JP2006009778A - Pump-up device and sealant injection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently supply compressed air into a pneumatic tire by suppressing fluctuation of drive current flowing in a drive motor when a piston is reciprocated in a cylinder. <P>SOLUTION: In an air pump 34, two cylinders 86, 88 are arranged in series along an axial direction of a crank shaft 84, and phase difference between a crank pin 108 which is a connecting point of a piston 120 and the crank shaft 84 and a crank pin 110 which is a connecting point of a piston 122 and the crank shaft 84 is set to 180°. Consequently, even if one piston 120 moves to discharge direction and moving load of the piston 120 in the cylinder 86 relatively increases, another piston 122 moves to a suction direction at that time and moving load of the piston 122 in the cylinder 88 decreases. Consequently, load fluctuation of two pistons mutually cancel, and drive current flowing in the drive motor 124 for rotating the crank shaft 84 can be kept roughly constant. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pump-up device for increasing the internal pressure of a pneumatic tire by supplying compressed air into the pneumatic tire, and for repairing the puncture of the pneumatic tire by injecting a sealing agent into the punctured pneumatic tire. The present invention relates to a sealing agent injection apparatus.

  In recent years, when a pneumatic tire (hereinafter simply referred to as a “tire”) is punctured, a sealing agent is injected into the tire in order to repair the puncture quickly without replacing the tire and wheels. 2. Description of the Related Art Sealing / pump-up devices in which a device and a pump-up device that pressurizes (pumps up) an internal pressure of a tire into which a sealing agent has been injected to a predetermined reference pressure are integrated. An example of this type of sealing / pump-up device is described in Patent Document 1. The sealing / pump-up device disclosed in Patent Document 1 includes a pressure-resistant container that contains a sealing agent and an air pump that is a supply source of compressed air, and the compressed air is supplied into the pressure-resistant container by the air pump. Thus, after injecting a prescribed amount of the sealing agent from the pressure vessel into the tire through the pressure hose due to the static pressure of the compressed air, the compressed air is supplied into the tire through the pressure vessel and the pressure hose to pump up the tire.

  By the way, as an air pump applied to the above-described sealing / pump-up device, for example, a reciprocating type as shown in FIG. 7 is often used. The air pump 410 is provided with a cylinder 412 and a piston 414 disposed in the cylinder 412 so as to be reciprocally movable. The piston 414 is connected to a crankshaft 416 via a connecting rod 418. In the air pump 410, the crankshaft 416 is rotated by torque from a drive motor (not shown), whereby the rotational motion of the crankshaft 416 is converted into reciprocating motion by the crankshaft 416 and the connecting rod 418, and the piston 414 is moved into the cylinder 412. Alternately move in the suction direction (downward) for expanding the volume of the cylinder and in the discharge direction (upward) for reducing the volume in the cylinder 412. At this time, when the piston 414 moves in the suction direction, air is sucked into the cylinder 412 from the suction port 420 provided at the top of the cylinder 412. Thereafter, when the piston 414 reaches the bottom dead center and moves in the discharge direction, the compressed air is discharged from the discharge port 422 provided at the top of the cylinder 412 while air is compressed in the cylinder 412 by the piston 414. The compressed air is supplied into the tire through a pressure hose or the like.

In addition to the air pump for supplying compressed air into the tire, the sealing / pump-up device sucks the sealing agent from the liquid container containing the sealing agent and pumps the sealing agent into the tire. As this liquid pump, for example, a reciprocating pump is used as in the case of an air pump.
Japanese Patent No. 3210863 (FIG. 1)

  By the way, in the air pump 410 as shown in FIG. 4, the crankshaft 416 is made heavy on the side opposite to the crankpin 426 in order to cancel the inertial force of the reciprocating piston 414 and suppress the generation of vibration and impact. A counterweight 424 is attached to the counterweight 424, or the counterweight 424 is formed integrally with the crankshaft 416. By balancing the mass distribution around the axis of the crankshaft 416 with the crankshaft 416 in this way, the occurrence of vibration and impact when the piston 414 reciprocates is suppressed, but the mass of the crankshaft 416 itself increases. As a result, the load on the drive motor increases.

  In the reciprocating air pump 410, when the piston 414 moves in the discharge direction and compresses the air in the cylinder 412, the movement load of the piston 414 relatively increases, and the piston 414 moves in the suction direction and moves to the cylinder 412. When air is sucked into the piston, the moving load of the piston 414 relatively decreases, and the driving current supplied to the driving motor also periodically varies according to the variation of the moving load of the piston 414.

  For this reason, when an air pump is used as a supply source of compressed air in the sealing / pump-up device and a drive current is supplied to the air pump from a battery mounted on the vehicle, the drive motor is used when the piston 414 moves in the discharge direction. In order to prevent the operation of the current breaker provided on the vehicle side when high current flows, the air pump must always be operated at a low efficiency (low work rate) with respect to the maximum capacity of the air pump. It is an impediment to shortening the tire pump-up time by the pump-up device.

  In addition to the air pump for supplying the compressed air into the tire, the sealing / pump-up device includes a liquid pump that sucks the sealing agent from the liquid container and pumps it into the tire. When the reciprocating type is used as the fluid pump, when the fluid pump is in operation, a high current flows through the drive motor when the piston moves in the discharge direction. The problem of having to operate in a state of low work rate occurs as in the case of an air pump.

  The first object of the present invention is to supply the compressed air efficiently into the pneumatic tire by suppressing the fluctuation of the drive current flowing in the drive motor when the piston is reciprocated in the cylinder in consideration of the above fact. An object of the present invention is to provide a pump-up device that can be used.

  In addition, the second object of the present invention is to take the above-mentioned fact into consideration and suppress fluctuations in the drive current flowing in the drive motor when the piston is reciprocated in the cylinder, so that the sealing agent is introduced from the liquid container into the pneumatic tire. It is an object of the present invention to provide a sealing agent injection device that can be efficiently supplied.

  A pump-up device according to claim 1 of the present invention is a pump-up device that supplies compressed air into a pneumatic tire to increase the internal pressure of the pneumatic tire, and discharges an intake port for sucking outside air and compressed air. And a plurality of cylinders each having discharge ports connected to a pneumatic tire, and a plurality of cylinders that are reciprocally movable in the plurality of cylinders, and when moving in the suction direction to expand the volume in the cylinders A plurality of pistons, each of which draws air from the suction port into the cylinder and discharges the air from the discharge port while compressing the air in the cylinder when moving in the discharge direction to reduce the volume in the cylinder; Clans that are connected to each other, rotate by torque from the outside, and alternately move the piston in the suction direction and the discharge direction. A shaft and a drive motor that is connected to the crankshaft so as to be able to transmit torque and that receives power from the outside to rotate the crankshaft; the number of installed cylinders is 2N (N is a natural number); The 2N cylinders are arranged in series along the axial direction of the crankshaft, and the connection points between the pistons arranged in the N cylinders and the crankshaft, respectively, and the remaining N cylinders The phase difference between the piston and the connecting point of the piston respectively disposed in the crankshaft is set to 180 °.

  In the pump-up device according to claim 1 of the present invention, 2N cylinders are arranged in series along the axial direction of the crankshaft, and are connected to the crankshafts of pistons respectively arranged in the N cylinders. By setting the phase difference between the connection point and the connection point between the pistons arranged in the remaining N cylinders and the crankshaft of 180 °, the N pistons move in the intake direction in the cylinders. In this case, when the remaining N pistons move in the discharge direction in the cylinder and the N pistons reach one dead center in the cylinder, the remaining N pistons move to the other in the cylinder. Since the dead point is reached, the same number (N) of the suction process for sucking air from the outside into the cylinder and the discharge process for discharging air from the cylinder while compressing the air inside the cylinder are always performed. It can be carried out in parallel by the ton.

  Further, in the pump-up device according to claim 1, the moving direction of the N pistons and the moving direction of the remaining N pistons are always opposite, and the N pistons and the remaining N pistons are the same. Since it reaches one dead center and the other dead center at the timing, the device can be operated in a state where the inertia force of the piston as a whole is always balanced, so a counter for canceling the piston inertia force on the crankshaft There is no need to provide weights.

  As a result, according to the pump-up device of the first aspect, even if the N pistons move in the discharge direction and the movement load of the N pistons increases relatively, at this time, the remaining N pistons Moves in the suction direction and the movement load of the remaining N pistons decreases, so that the influences of the load fluctuations of the 2N pistons cancel each other, and the rotational resistance of the crankshaft that reciprocates these 2N pistons The drive current flowing through the drive motor that rotates the crankshaft can be kept substantially constant, so that a current substantially equal to the rated current value that can be supplied by the vehicle battery can always be supplied to the drive motor. Furthermore, there is no need to provide a counterweight on the crankshaft to counteract the inertial force of the piston. It turned into to be able to reduce the load on the drive motor.

  Therefore, according to the pump-up device of the first aspect, it is possible to efficiently reduce the pump-up time for the pneumatic tire by increasing the supply efficiency of the compressed air to the pneumatic tire.

  A pump-up device according to claim 2 of the present invention is a pump-up device that supplies compressed air into a pneumatic tire to increase the internal pressure of the pneumatic tire, and includes a suction port for sucking outside air and compressed air. A plurality of cylinders each having a discharge port connected to a pneumatic tire for discharging and a reciprocating movement in each of the plurality of cylinders, and movement in a suction direction for expanding the volume in the cylinder A plurality of pistons, each of which draws air from the suction port into the cylinder and discharges the air from the discharge port while compressing the air in the cylinder when moving in the discharge direction to reduce the volume in the cylinder Are coupled to each other, and are rotated by torque from the outside and move the piston alternately in the suction direction and the discharge direction. A crankshaft and a drive motor that is connected to the crankshaft so as to be able to transmit torque and that rotates the crankshaft by receiving an external power supply. The number of cylinders installed is 2N (N is a natural number). N cylinders out of 2N are arranged in series along the axial direction of the crankshaft, and the remaining N cylinders are arranged in the circumferential direction around the crankshaft. Are arranged in series in different parts from each other and connected to the crankshaft of the piston respectively disposed in the N cylinders and the remaining N cylinders. The phase difference between the connecting point of the piston and the crankshaft is set to 0 °.

  In the pump-up device according to claim 2 of the present invention, N cylinders out of 2N are arranged in series along the axial direction of the crankshaft, and the remaining N cylinders are centered on the crankshaft. The N cylinders are arranged in series along the circumferential direction in a different part from each other, and the connection points between the pistons disposed in the N cylinders and crankshafts of the pistons and the remaining N cylinders are arranged. By setting the phase difference between the pistons arranged in the cylinders and the connection points with the crankshaft to 0 °, when the N pistons move in the intake direction in the cylinders, the remaining N pistons When the pistons in the cylinder move in the discharge direction and N pistons reach one dead center in the cylinder, the remaining N pistons reach the other dead center in the cylinder. The suction process for sucking air from the part into the cylinder and the discharge process for discharging air from the cylinder while compressing the air in the cylinder can always be performed in parallel by the same number (N) of pistons.

  Further, in the pump-up device according to claim 2, the moving direction of the N pistons is always opposite to the moving direction of the remaining N pistons, and the N pistons and the remaining N pistons are the same. Since one dead center and the other dead center are reached at the timing, it is possible to operate in a state where the inertia force of the piston as a whole is always balanced, so a counterweight for canceling the piston inertia force is provided on the crankshaft. There is no need to provide it.

  As a result, according to the pump-up device of the second aspect, even if the N pistons move in the discharge direction and the movement load of the N pistons increases relatively, at this time, the remaining N pistons Moves in the suction direction and the movement load of the remaining N pistons decreases, so that the influences of the load fluctuations of the 2N pistons cancel each other, and the rotational resistance of the crankshaft that reciprocates these 2N pistons The drive current that flows through the drive motor that rotates the crankshaft can also be kept substantially constant, so that the drive motor always has a maximum current value substantially equal to the rated current value that can be supplied by the vehicle battery. Since there is no need to provide a counterweight on the crankshaft to counteract the inertial force of the piston, The Yafuto by weight can reduce the load on the drive motor.

  Therefore, according to the pump-up device of the second aspect, it is possible to efficiently reduce the pump-up time for the pneumatic tire by increasing the supply efficiency of the compressed air to the pneumatic tire.

  Of the 2N cylinders, N cylinders are arranged in series along the axial direction of the crankshaft, and the remaining N cylinders are connected to the N cylinders along the circumferential direction around the crankshaft. Are arranged in series at different parts, specifically, when the opening angle of the N cylinders and the remaining N cylinders around the axis of the crankshaft is 180 ° (facing them to each other) And the opening angle of the N cylinders and the remaining N cylinders around the axis of the crankshaft is larger than 0 ° and smaller than 180 ° (when V-shaped arrangement is used). is there.

  The pump-up device according to claim 3 of the present invention is the pump-up device according to claim 1 or 2, wherein the power supply means is connected to a battery mounted on the vehicle and supplies power from the battery to the drive motor. It is characterized by having.

  A sealing agent injection device according to claim 4 of the present invention is a sealing agent injection device for inhaling a sealing agent accommodated in a liquid container and injecting the sealing agent into a pneumatic tire while pressurizing the sealing agent. A suction port that is connected to the liquid agent container and sucks a sealing agent from the liquid agent container, and a discharge port that discharges the sealing agent sucked from the liquid agent container in a pressurized state and is connected to a pneumatic tire. A plurality of formed cylinders and a plurality of cylinders are reciprocally disposed in the plurality of cylinders, respectively, and are moved from the liquid container to the inside of the cylinder through the suction port when moving in the suction direction for expanding the volume in the cylinders. The sealant in the cylinder is pressurized during movement in the discharge direction, which sucks the sealant into the cylinder and reduces the volume in the cylinder. A piston to be discharged from the discharge port, and a plurality of the pistons connected to each other and rotated by torque from the outside, and the piston is alternately moved in the suction direction and the discharge direction, and the crankshaft And a drive motor that rotates the crankshaft in response to an external power supply. The number of installed cylinders is 2N (N is a natural number), and the 2N cylinders are The crankshafts are arranged in series along the axial direction of the crankshaft, and are arranged in connection points of the pistons arranged in N cylinders with the crankshaft and in the remaining N cylinders, respectively. Further, the phase difference between the piston and the connection point with the crankshaft is set to 180 °.

  In the sealing agent injecting device according to claim 4 of the present invention, 2N cylinders are arranged in series along the axial direction of the crankshaft, and the piston crankshafts respectively arranged in the N cylinders; The phase difference between the connecting point of the piston and the connecting point of the crankshaft of the piston respectively disposed in the remaining N cylinders is set to 180 °, so that the N pistons move in the intake direction within the cylinder. When the remaining N pistons move in the discharge direction in the cylinder and the N pistons reach one dead center in the cylinder, the remaining N pistons move in the other in the cylinder. Therefore, there are a suction process for sucking the sealing agent from the liquid container into the cylinder and a discharge process for discharging the cylinder from the cylinder while pressurizing the sealing agent in the cylinder. Always be carried out concurrently by the same number of (N) by the piston.

  Further, in the sealing agent injecting device according to claim 4, the moving direction of the N pistons is always opposite to the moving direction of the remaining N pistons, and the N pistons and the remaining N pistons are Since one dead center and the other dead center are reached at the same timing, the device can be operated in a state where the inertial force of the piston as a whole is balanced, so that the inertial force of the piston on the crankshaft is canceled out. There is no need to provide a counterweight.

  As a result, according to the sealing agent injecting device of the fourth aspect, even if the N pistons move in the discharge direction and the movement load of the N pistons relatively increases, at this time, the remaining N pieces Since the pistons move in the suction direction and the movement load of the remaining N pistons decreases, the influence of the load fluctuations of the 2N pistons cancels each other, and rotation of the crankshaft that reciprocates these 2N pistons Since the resistance can be kept substantially constant and the drive current flowing through the drive motor that rotates the crankshaft can be kept substantially constant, a current substantially equal to the rated current value that can be supplied by the vehicle battery can always be supplied to the drive motor. In addition, there is no need to provide a counterweight on the crankshaft to counteract the inertial force of the piston. And weight can reduce the load on the drive motor.

  Therefore, according to the sealing agent injecting device of the fourth aspect, it is possible to increase the supply efficiency of the sealing agent to the pneumatic tire and efficiently reduce the time for injecting the sealing agent into the pneumatic tire.

  A sealing agent injecting device according to claim 5 of the present invention is a sealing agent injecting device for inhaling a sealing agent accommodated in a liquid agent container and injecting the sealing agent into a pneumatic tire while pressurizing the sealing agent. A suction port that is connected to the liquid agent container and sucks a sealing agent from the liquid agent container, and a discharge port that discharges the sealing agent sucked from the liquid agent container in a pressurized state and is connected to a pneumatic tire. A plurality of formed cylinders and a plurality of cylinders are reciprocally disposed in the plurality of cylinders, respectively, and are moved from the liquid container to the inside of the cylinder through the suction port when moving in the suction direction for expanding the volume in the cylinders. The sealant in the cylinder is pressurized during movement in the discharge direction, which sucks the sealant into the cylinder and reduces the volume in the cylinder. A piston to be discharged from the discharge port, and a plurality of the pistons connected to each other and rotated by torque from the outside, and the piston is alternately moved in the suction direction and the discharge direction, and the crankshaft And a drive motor that rotates the crankshaft in response to an external power supply. The number of cylinders installed is 2N (N is a natural number), and N of 2N Cylinders are arranged in series along the axial direction of the crankshaft, and the remaining N cylinders are arranged in series at different locations from the N cylinders along the circumferential direction around the crankshaft. And the connecting points of the pistons arranged in the N cylinders with the crankshaft, respectively, and the front The phase difference between the point of attachment to the rest of the N of the crank shaft of the pistons disposed respectively in the cylinder, characterized in that set to 0 °.

  In the sealing agent injecting device according to claim 5 of the present invention, N cylinders out of 2N are arranged in series along the axial direction of the crankshaft, and the remaining N cylinders are centered on the crankshaft. Are arranged in series in a portion different from the N cylinders along the circumferential direction, and a connection point between the pistons disposed in the N cylinders and a crankshaft of the piston and the remaining N cylinders. Since the phase difference between the pistons arranged in the cylinders and the connection point with the crankshaft of the pistons is set to 0 °, when the N pistons move in the suction direction in the cylinders, the remaining N When one piston moves in the discharge direction in the cylinder and N pistons reach one dead center in the cylinder, the remaining N pistons reach the other dead center in the cylinder. In addition, the suction process for sucking the sealing agent from the liquid container into the cylinder and the discharge process for discharging the cylinder from the cylinder while pressurizing the sealing agent in the cylinder are always performed in parallel by the same number (N) of pistons. Can do.

  Further, in the sealing agent injecting device according to claim 5, the moving direction of the N pistons and the moving direction of the remaining N pistons are always opposite, and the N pistons and the remaining N pistons are Since it reaches one dead center and the other dead center at the same timing, it can be operated in a state where the inertia force of the piston as a whole is always balanced, so the counterweight for canceling the piston inertia force on the crankshaft Need not be provided.

  As a result, according to the pump-up device of the fifth aspect, even if the N pistons move in the discharge direction and the movement load of the N pistons increases relatively, the remaining N pistons at this time Moves in the suction direction and the movement load of the remaining N pistons decreases, so that the influences of the load fluctuations of the 2N pistons cancel each other, and the rotational resistance of the crankshaft that reciprocates these 2N pistons The drive current that flows through the drive motor that rotates the crankshaft can also be kept substantially constant, so that the drive motor always has a maximum current value substantially equal to the rated current value that can be supplied by the vehicle battery. Since there is no need to provide a counterweight on the crankshaft to counteract the inertial force of the piston, The Yafuto by weight can reduce the load on the drive motor.

  Therefore, according to the pump-up device of the fifth aspect, it is possible to increase the supply efficiency of the sealing agent to the pneumatic tire and efficiently reduce the injection time of the sealing agent to the pneumatic tire.

  Of the 2N cylinders, N cylinders are arranged in series along the axial direction of the crankshaft, and the remaining N cylinders are connected to the N cylinders along the circumferential direction around the crankshaft. Are arranged in series at different parts, specifically, when the opening angle of the N cylinders and the remaining N cylinders around the axis of the crankshaft is 180 ° (facing them to each other) And the opening angle of the N cylinders and the remaining N cylinders around the axis of the crankshaft is larger than 0 ° and smaller than 180 ° (when V-shaped arrangement is used). is there.

  A sealing agent injection device according to claim 6 of the present invention is the sealing agent injection device according to claim 4 or 5, wherein the sealing agent injection device is connected to a battery mounted on a vehicle and supplies electric power from the battery to the drive motor. It has a supply means, It is characterized by the above-mentioned.

  As described above, according to the pump-up device of the present invention, when the piston is reciprocated in the cylinder, the fluctuation of the drive current flowing through the drive motor is suppressed, and the compressed air is efficiently supplied into the pneumatic tire. Can supply.

  Moreover, according to the sealing agent injecting device according to the present invention, when the piston is reciprocated in the cylinder, the fluctuation of the driving current flowing through the driving motor can be suppressed, and the sealing agent can be efficiently supplied into the pneumatic tire.

Hereinafter, a sealing and pump-up device according to an embodiment of the present invention will be described.
[First Embodiment]
(Configuration of sealing / pump-up device)
FIG. 1 shows a sealing / pump-up device according to a first embodiment of the present invention. The sealing / pump-up device 30 repairs a tire with a sealing agent without replacing the tire and the wheel when a pneumatic tire (hereinafter simply referred to as “tire”) mounted on a vehicle such as an automobile punctures. Then, the internal pressure is re-pressurized (pumped up) to a predetermined reference pressure.

  As shown in FIG. 1, the sealing / pump-up device 30 includes a box-shaped casing 32 as an outer shell, and an air pump 34 is disposed in the casing 32 as a compressed air supply source. . In the casing 32, a liquid agent container 40 for accommodating the sealing agent 36 is disposed. The liquid agent container 40 contains a sealing agent in an amount (for example, 400 g to 600 g) specified for each type of tire to be repaired by the sealing / pump-up device 30.

  Here, the liquid container 40 is formed of a resin such as polyethylene or polypropylene. As the liquid container 40, a container having a pressure resistance considerably lower than a pressure (reference pressure) defined as an internal pressure of a general pneumatic tire can be used, and a container having a special airtight structure needs to be used. Nor. Further, the liquid agent container 40 is provided with an air receiving port 39 at the top plate portion on the upper end side along the height direction, and is provided with a liquid agent discharge port 38 at the bottom plate portion on the lower end side.

  As shown in FIG. 1, the air pump 34 is provided with an air suction portion 41 and an air supply portion 43. The air suction portion 41 and the air supply portion 43 include an air suction port 42 and an air supply port 44. Are open. When operating, the air pump sucks air from the outside through the air suction port 42, pressurizes the suction air at a predetermined compression ratio, and discharges the air through the air supply port 44. The air pump 34 has a compression capacity capable of compressing atmospheric air to about 0.5 MPa to 1.0 MPa. One end of a common pipe 46 made of a pressure hose, pipe, or the like is connected to the air supply port 44, and an air switching valve 48 is connected to the other end of the common pipe 46. As the air switching valve 48, a three-way (three-port) electromagnetic valve having one intake port 49 and two discharge ports 50 and 51 is used.

  Here, a common pipe 46 is connected to the suction port 49 of the air switching valve 48, and one exhaust port 50 is connected to a first air pipe 54 made of a piping material having sufficient pressure resistance such as a pressure hose and a metal pipe. One end is connected, and the other exhaust port 51 is connected to one end of a second air pipe 56 made of a fluid hose or the like. As the common pipe 46 and the first air pipe 54, it is necessary to use a pipe that can withstand a pressure obtained by multiplying the reference pressure of the tire 20 by a predetermined safety factor (usually 2.0 to 5.0). In addition, the reference pressure of the tire 20 varies widely depending on the type of vehicle and the like, but is appropriately set within a range of 0.20 MPa to 0.30 MPa for a passenger car.

  The other end of the second air pipe 56 is connected to the air receiving port 39 of the liquid agent container 40. Accordingly, the discharge port 51 of the air switching valve 48 communicates with the air receiving port 39 of the liquid agent container 40 through the second air pipe 56. Further, one end of a liquid injection pipe 58 is connected to the liquid agent discharge port 38 of the liquid agent container 40 from a hose for low-pressure fluid or the like.

  As shown in FIG. 1, similarly to the air switching valve 48, the sealing / pump-up device 30 is provided with a gas-liquid switching valve 60 having two suction ports 61 and 62 and one discharge port 63. The other end of the liquid injection pipe 58 and the other end of the first air pipe 54 are connected to the two suction ports 61 and 62 in the gas-liquid switching valve 60, respectively. One end of a joint hose 66 is connected to the discharge port 63 of the gas-liquid switching valve 60. An adapter 68 that can be screwed to the tire valve 22 of the tire 20 is disposed at the other end of the joint hose 66. As the joint hose 66, one having a pressure resistance substantially equal to that of the common pipe 46 and the first air pipe 54 is used. Specifically, the joint hose 66 is preferably a pressure hose reinforced with nylon fiber or the like.

  As shown in FIG. 1B, the adapter 68 is formed in a substantially cylindrical shape, and a hollow hole 68A penetrating in the axial direction is formed in the adapter 68. A female screw portion 68B that can be screwed into the male screw portion 22A of the tire valve 22 is formed on the inner peripheral surface of the hollow hole 68A. In addition, the adapter 68 has a valve pressing portion 69 extending in an arch shape in the radial direction in the hollow hole 68A. On the other hand, a rod-shaped valve core 23 is slidably disposed between the closed position and the open position along the axial direction in the cylindrical tire valve 22 having a diameter smaller than that of the adapter 68. The valve core 22 is always biased to the illustrated closed position by a biasing member (not shown) such as a coil spring built in the tire valve 22.

  Here, when the adapter 68 is screwed to the tire valve 22, the pressing portion 69 in the adapter 68 presses the valve core 23 toward the root side of the tire valve 22, and resists the urging force of the urging member from the closed position to the open position. Slide to. Thus, when the sealing agent 36 and compressed air are supplied into the tire 20, the joint hose 66 is simply screwed to the tire valve 22 without removing the valve core 23 from the tire valve 22. The tire 20 communicates with the inside of the tire 20 through the tire valve 22. When the adapter 68 is removed from the tire valve 68, the valve core 69 that has been in the open position returns to the closed position by the biasing force of the biasing member, thereby closing the tire valve 68.

  The sealing / pump-up device 30 is provided with an operation panel 70 having a start / stop button 72 and a gas-liquid switching button 74 outside the casing 32, and a current breaker 76 and a power circuit 78 are provided inside the casing 32. It has been. A two-core power cable 80 is connected to the power circuit 78 via a current breaker 76. A plug 82 that can be inserted into and removed from a cigar socket (not shown) installed in the vehicle is provided at the front end of the power cable 80. By inserting the plug 82 into the cigar socket, the plug 82 is attached to the vehicle. Power can be supplied to the power supply circuit 78 from the mounted battery. The power supply circuit 78 controls the operations of the air pump 34 and the switching valves 48 and 60 in response to operations on the start / stop button 72 and the gas-liquid switching button 74, respectively.

  As the current breaker 76, for example, a fuse type is used. The current breaker 76 is connected in series to one conductor in a power cable 80 composed of two conductors via a pair of external contacts (not shown). As a result, when an overcurrent exceeding the allowable current flows through the power supply circuit 78 and the fuse is blown, the power cable 80 becomes non-conductive and the power supply from the vehicle battery to the power supply circuit 78 is cut off.

  The air pump 34 is configured as an in-line two-cylinder reciprocating type. As shown in FIG. 2, the air pump 34 is provided with a crankshaft 84 that is rotatably supported by a bearing (not shown). Two cylinders 86 and 88 arranged in series along the axial direction of the crankshaft 84 are provided. In these cylinders 86 and 88, compression chambers 87 and 89, which are cylindrical spaces, are formed, respectively. Further, as shown in FIG. 2B, a suction port 90 and a discharge port 92 are opened at the tops of the cylinders 86 and 88. The suction port 90 and the discharge port 92 have a suction direction and a discharge direction, respectively. A suction valve 94 and a discharge valve 96 that allow fluid (air) to flow only in the direction are arranged to be openable and closable. Here, the suction port 90 and the discharge port 92 of the cylinders 86 and 88 are connected to the air suction port 42 and the air supply port 44 through pipes 98 and 100, respectively.

  As shown in FIG. 2 (A), pistons 120 and 122 are accommodated in cylinders 86 and 88, respectively, so as to be capable of reciprocating along a radial direction centering on axis S of crankshaft 84. These pistons 120 and 122 alternately move in the suction direction (arrow V direction) for expanding the internal volume of the compression chambers 87 and 89 and in the discharge direction (arrow E direction) for reducing the internal volume of the compression chambers 87 and 89. . At this time, when the pistons 120 and 122 move in the suction direction of the compression chambers 87 and 89, air is sucked into the compression chambers 87 and 89 through the suction port 90, and when the pistons 120 and 122 move in the discharge direction, The air in the compression chambers 87 and 89 is discharged from the discharge port 92 while being compressed by the pistons 120 and 122.

  The crankshaft 84 is formed with three crank portions 102, 104, 106 each formed in a disc shape, the crank portion 102 and the crank portion 104 are connected by a crank pin 108, and the crank portion 104 Are connected by a crank pin 110. Here, the dimension from the shaft center S to the crankpin 108 is equal to the dimension from the crankpin 110, and the phase difference between the crankpin 108 and the crankpin 110 in the rotation direction about the shaft center S is 180 °. Is set to

  The two pistons 120 and 122 are connected to the crankshaft 84 via connecting rods 112 and 114. Here, the connecting rods 112 and 114 are rotatably connected to the pistons 120 and 122 via piston pins 128 provided at the pistons 120 and 122 at one end and the other ends of the connecting rods 112 and 114 at the crankshaft 84. The crankpins 108 and 110 are connected so as to be relatively rotatable. As a result, when the crankshaft 84 is rotated by torque from a drive motor 124 described later, the rotational movement of the crankshaft 84 is caused by the crankshaft 84 and the connecting rods 112 and 114 along the radial direction around the axis S. , 122 are converted into reciprocating movements, and the pistons 120, 122 move alternately in the cylinders 86, 88 in the suction direction and the discharge direction (arrow E direction).

  At this time, in the air pump 34, the two cylinders 86 and 88 are arranged in series along the axial direction of the crankshaft 84, and the crankpin 108, which is a connection point of the piston 120 with the crankshaft 84, Since the phase difference with the crank pin 110, which is the connection point with the crankshaft 84, is set to 180 °, when one piston 120 moves in the suction direction within the cylinder 86, the other piston 122 moves to the cylinder. When the piston moves in the discharge direction within 88 and one piston 120 reaches one dead center within the cylinder 86, the other piston 122 reaches the other dead center within the cylinder 86.

  As shown in FIG. 2A, a DC drive motor 124 is connected to the crankshaft 84 through a reduction gear 126 so as to transmit torque. When DC power is supplied from the power supply circuit 78 (see FIG. 1), the drive motor 124 transmits torque corresponding to the current value to the crankshaft 84 via the reducer 126 and rotates the crankshaft 84 in one direction. Let

  Here, in the air pump 34, the piston diameter (diameter) is preferably set to 10 mm to 40 mm, and the piston stroke is set to 4 mm to 30 mm. As the drive motor 124, for example, RS550VC7525 made by Mabuchi can be used. Under these conditions, when the air pump 34 is operated using a battery (rated voltage 12 V, rated current 15 A) mounted on the vehicle as a power source, if the piston diameter is smaller than 10 mm, the compressed air is discharged from the pistons 120 and 122. If a sufficient amount is not obtained and the piston diameter exceeds 40 mm, the driving torque required for rotation of the crankshaft 84 increases. Therefore, the rotation speed of the crankshaft 84 cannot be increased, and the pistons 120 and 122 As a result, a sufficient discharge amount of compressed air cannot be obtained. If the piston stroke is smaller than 3 mm, the compression ratio of the air in the compression chambers 87 and 89 is insufficient, and the necessary air pressure cannot be obtained. If the piston stroke exceeds 30 mm, it is necessary when the crankshaft 84 rotates. Therefore, the rotational speed of the crankshaft 84 cannot be increased, and a sufficient amount of compressed air discharged from the pistons 120 and 122 cannot be obtained.

  Next, the sealing agent 36 used for the sealing / pump-up device 30 will be described. The sealing agent 36 includes rubber latex such as SBR (styrene butadiene rubber) latex, NBR (acrylonitrile-butadiene rubber) latex, rubber latex of a mixture of SBR latex and NBR latex, and an aqueous dispersion or an emulsion thereof. It has a resin adhesive added in the state.

  Further, the sealing agent 36 may be mixed with a fiber material or whisker made of polyester, polypropylene, glass or the like, or a filler (filler) made of calcium carbonate, carbon black or the like in order to improve the sealing performance against the puncture hole. In addition, silicate or polystyrene particles may be mixed in order to stabilize the sealing performance.

  In addition to the above-described components, anti-freezing agents such as glycol, ethylene-glycol, and propylene glycol, antifoaming agents, pH adjusters, and emulsifiers are generally added to the sealing agent 36.

(Operation and action of sealing / pump-up device)
Next, an operation procedure for repairing the punctured tire 20 using the sealing / pump-up device 30 according to the present embodiment will be described.

When puncture occurs in the tire 20, first, the operator screws the adapter 68 to the tire valve 22 in the tire 20 and connects the joint hose 66 to the punctured tire 20. At this time, the air pump 34 is stopped, and the air switching valve 48 is in a position (pressurization position) where the suction port 49 communicates with the discharge port 51. On the other hand, the gas-liquid switching valve 60 is in a position where the discharge port 63 communicates with the suction port 61 and closes the liquid injection pipe 58, and the sealing agent 36 in the liquid container 40 passes through the liquid injection pipe 58 due to its own weight. Is prevented from leaking out. At this time, the gas-liquid switching valve 60 opens the first air pipe 54, but is closed by the air switching valve 48, so that the compressed air supplied by the air pump 34 is contained in the first air pipe 54. Next, the operator inserts the plug 82 of the power cable 80 into the socket of the cigarette lighter of the vehicle and then presses the start / stop button 72 of the operation panel 70. In conjunction with this, the power circuit 78 operates the air pump 34 to send compressed air into the liquid agent container 40 through the common pipe 46 and the second air pipe 56.

  The power supply circuit 78 switches the communication destination of the discharge port 63 in the gas-liquid switching valve 60 from the discharge port 62 to the discharge port 63 when a predetermined time has elapsed from the operation of the air pump 34. Thereby, the inside of the liquid agent container 40 communicates with the inside of the tire 20 through the liquid injection pipe 58 and the joint hose 66, and the sealing agent 36 is pushed out from the inside of the liquid agent container 40 by its own weight and the static pressure of the compressed air. Is injected into the tire 20 through the injection pipe 58 and the joint hose 66. As a result, the sealing agent 36 is pushed out of the liquid container 40 under the static pressure of the compressed air.

  At this time, the static pressure of the air layer portion in the liquid agent container 40 is set according to the viscosity of the sealing agent 36, and the sealing agent 36 is removed from the liquid agent container 40 even if it is considerably lower than the reference pressure of the tire 20. The time for injecting into the tire 20 can be effectively shortened. Specifically, the static air pressure in the liquid agent container 40 is set in the range of 0.05 MPa to 0.15 MPa according to the viscosity of the sealing agent 36, and the higher the viscosity of the sealing agent 36 in this range, the higher the pressure. Is set.

  When the sealing agent 36 is injected from the liquid container 40 into the tire 20, the power pump 78 rotates the air pump 34 at a lower speed than when the tire 20 is pumped up so that the static pressure in the liquid container 40 does not increase rapidly. It is preferable to control so as to.

  When the injection of a predetermined amount of the sealing agent 36 from the liquid container 40 into the tire 20 is completed, the operator presses the gas-liquid switch button 74 on the operation panel 70. The completion of the injection of the predetermined amount of the sealing agent 36 may be determined by using the time from the start of injection as a parameter, and a transparent window portion is provided in the liquid agent container 40, and an operator can remove the sealing agent 36 through the window portion. The injection amount may be confirmed.

  In conjunction with the depression of the gas-liquid switching button 74, the power supply circuit 78 switches the communication destination of the discharge port 63 of the gas-liquid switching valve 60 from the suction port 62 to the suction port 61. The communication destination of the port 49 is switched from the discharge port 51 to the discharge port 50. Thereby, the compressed air supplied from the air pump 34 is supplied into the tire 20 through the first air pipe 54 and the joint hose 66, and the tire 20 is inflated by increasing the internal pressure of the tire 20.

  Thereafter, when the operator confirms that the internal pressure of the tire 20 has become the specified pressure using a pressure gauge (not shown) provided in the air pump 34, the operator presses the start / stop button 72 again. In conjunction with this, the power supply circuit 78 stops the power supply to the air pump 34. Next, the operator removes the adapter 68 from the tire valve 22 and disconnects the joint hose 66 from the tire 20.

  Immediately after completing the inflation with the specified pressure of the tire 20, the worker uses the tire 20 into which the sealing agent 36 has been injected to travel preliminarily for a certain distance. As a result, the sealing agent 36 is uniformly diffused into the tire 20, and the sealing agent 36 is filled in the puncture hole to close the puncture hole. After completion of the preliminary traveling, the operator confirms the internal pressure of the tire 20 and then screwes the adapter 68 of the joint hose 66 to the tire valve 22 again as necessary, and operates the air pump 34 to bring the tire 20 to the specified internal pressure. Pressurize. Thereby, when the puncture repair of the tire 20 is completed and the joint hose 66 is removed from the tire 20, normal running using the tire 20 becomes possible.

  In the sealing / sealing / pump-up device 30, the load on the drive motor 124 rises abnormally due to some cause during operation of the air pump 34, such as damage to the air pump 34, or the power cable 80 is leaked due to electric leakage from the power circuit 78. When an overcurrent exceeding the allowable current flows, the overcurrent also flows through the current breaker 76 connected in series with the power cable 80. Therefore, when an overcurrent continues to flow through the power cable 80 beyond a predetermined response time, the current breaker 76 operates and cuts off the power supply from the vehicle battery to the power circuit 78 through the power cable 80.

  In the air pump 34 of the sealing and pump-up device 30 according to the embodiment of the present invention described above, the two cylinders 86 and 88 are arranged in series along the axial direction of the crankshaft 84 and the crankshaft of the piston 120 is arranged. The phase difference between the crank pin 108, which is the connection point of the piston 122, and the crank pin 110, which is the connection point of the crank shaft 84 of the piston 122, is set to 180 °. When moving in the suction direction, when the other piston 122 moves in the discharge direction in the cylinder 88 and one piston 120 reaches one dead point in the cylinder 86, the other piston 122 moves to the cylinder 86. The other dead center is reached, so that air is sucked into the cylinders 86 and 88 from the outside. And a discharge step of discharging from the cylinder 86, 88 while compressing the air in the cylinder 86, 88 can be always performed in parallel by the piston 120 and 122 of one by one.

  Further, in the air pump 34 of the sealing / pump-up device 30, the moving direction of the piston 120 and the moving direction of the piston 122 are always opposite to each other, and one dead center and the other dead center of the piston 120 and the piston 122 are at the same timing. Therefore, since it is possible to operate with the inertia force of the pistons 120 and 122 as a whole being balanced, it is not necessary to provide a counterweight for canceling the inertia force of the pistons 120 and 122 on the crankshaft 84. .

  As a result, according to the air pump 34 of the sealing / pump-up device 30 according to the present embodiment, one piston 120 moves in the discharge direction, and the movement load of the piston 120 in the cylinder 86 relatively increases. However, at this time, the remaining one piston 122 moves in the suction direction, and the movement load of the piston 122 in the cylinder 88 is reduced. Therefore, the load fluctuations of the two pistons 120 and 122 are canceled each other. Since the rotational resistance of the crankshaft 84 for reciprocating the two pistons 120 and 122 can be kept substantially constant, and the drive current flowing through the drive motor 124 for rotating the crankshaft 84 can also be kept substantially constant, the vehicle A current substantially equal to the rated current value that can be supplied by this battery can always be supplied to the drive motor 124. , Further the need to provide a counterweight for canceling the inertia force of the piston 120, 122 is eliminated in the crankshaft 84, the crankshaft 84 can reduce the load of lighter to the drive motor.

  Therefore, according to the sealing / pump-up device 30 according to the present embodiment, it is possible to increase the supply efficiency of the compressed air to the pneumatic tire and efficiently reduce the injection time and the pump-up time of the sealing agent 36 to the tire 20.

  In the sealing / pump-up device 30 according to the present embodiment, only the case where the air pump 34 has two cylinders arranged in series has been described, but the number of cylinders is 2N (N is a natural number) ( For example, in an air pump in which these cylinders are arranged in series in a row along the axial direction of the crankshaft, the connection points (crankpins) of N pistons with the crankshaft ) And the connection point (crank pin) of the remaining N pistons with the crankshaft is set to 180 °, the N pistons move in the discharge direction as in the air pump 34 of the present embodiment. Since the remaining N pistons move in the suction direction, the influence of the load fluctuations of the 2N pistons cancels each other, and these 2N pistons Maintaining the rotational resistance of the crankshaft for reciprocating a ton substantially constant, and may be lighter crankshaft omitted counterweight, obtained an effect that.

(Modified air pump)
Next, a modified example of the air pump applicable to the sealing / pump-up device 30 according to the first embodiment of the present invention will be described. FIG. 3 shows an air pump 130 applicable to the sealing / pump-up device 30 instead of the air pump 34 shown in FIG. Note that, in the air pump 130 according to this modification, the same reference numerals are given to the same parts as the air pump 34 shown in FIG.

  The air pump 130 is configured as a reciprocating type of opposed two cylinders, and as shown in FIG. 3, the air pump 130 is provided with a crankshaft 132 rotatably supported by a bearing (not shown), Two cylinders 134 and 136 extending along the radial direction of the crankshaft 84 are provided. Here, the one cylinder 134 and the other cylinder 136 are arranged at different locations along the circumferential direction around the axis S of the crankshaft 132, and the axes of the cylinders 134 and 136 are arranged. The opening angle centered on S is 180 °.

  In these cylinders 134 and 136, compression chambers 138 and 140, which are cylindrical spaces, are formed, respectively. Further, as shown in FIG. 3B, a suction port 142 and a discharge port 144 are opened at the tops of the cylinders 134 and 136. The suction port 94 and the discharge port 144 are connected to the suction port 142 and the discharge port 144, respectively. A valve 96 is arranged to be openable and closable. As shown in FIG. 3A, pistons 146 and 148 are accommodated in cylinders 134 and 136, respectively, so as to be capable of reciprocating along a radial direction centering on axis S of crankshaft 132.

  The crankshaft 132 is formed with two crank portions 150 and 152 each formed in a disc shape, and the crank portion 150 and the crank portion 152 are connected by a crank pin 158. The two pistons 146 and 148 are connected to the crankshaft 132 via connecting rods 154 and 156. Here, the two connecting rods 154 and 156 are connected to the pistons 146 and 148 so that their one ends are relatively rotatable via piston pins 160 and 162 provided on the pistons 146 and 148, respectively. Are connected to the same crank pin 158 in the crankshaft 132 so as to be relatively rotatable. As a result, when the crankshaft 132 is rotated by the torque from the drive motor 124, the rotational movement of the crankshaft 132 is converted into the reciprocating movement of the pistons 146 and 148 along the radial direction about the axis S. , 148 are alternately moved in the cylinders 134, 136 in the suction direction and the discharge direction (arrow E direction).

  At this time, in the air pump 130, the two cylinders 134 and 136 are arranged so as to extend in the radial direction of the crankshaft 132, respectively, and the opening angle between one cylinder 134 and the other cylinder 136 is set to 180 °. When the pistons 146 and 148 disposed in the two cylinders 134 and 136 are connected to the same crank pin 158 in the crankshaft 132, one piston 146 moves in the suction direction in the cylinder 134. When the other piston 148 moves in the discharge direction in the cylinder 136 and one piston 146 reaches one dead center in the cylinder 134, the other piston 148 moves in the cylinder 136 to the other dead center. To reach.

  Here, in the air pump 130, for the same reason as in the case of the air pump 34, the piston diameter (diameter) is preferably set to 10 mm to 40 mm and the piston stroke is set to 4 mm to 30 mm.

  In the air pump 130 described above, as in the case where the air pump 34 shown in FIG. 2 is used, the suction process for sucking air from the outside into the cylinders 134 and 136 and the air in the cylinders 134 and 136 are compressed. The discharge process of discharging from the cylinders 134 and 136 can always be performed in parallel by the same number (one) of pistons, and the device is in a state where the inertial forces of the two pistons 146 and 148 are always balanced. Therefore, it is not necessary to provide a counterweight for canceling out the inertial force of the pistons 146 and 148 on the crankshaft 132. Therefore, the sealing / pump-up device 30 using the air pump 130 can also increase the efficiency of supplying compressed air to the tire 20 and efficiently shorten the time for injecting the sealing agent 36 and the pump-up time into the tire 20.

  In addition, as the air pump 130 according to the modified example, the description has been made only for the two cylinders that are opposed to each other. However, the number of cylinders as a whole is 2N (N is a natural number) (for example, 4, 6 cylinders). N cylinders are arranged in series in a line along the axial direction of the crankshaft, and the remaining N cylinders are arranged along the circumferential direction centered on the axis S of the crankshaft 132. Even with an air pump arranged in series in a different part from the N cylinders, if the phase difference between the crankpin to which the N pistons are connected and the crankpin to which the remaining N pistons are connected is set to 0 °. Similarly to the air pump 130 according to the modified example, when the N pistons move in the discharge direction, the remaining N pistons move in the suction direction. Cancel the influence of load fluctuation to each other, keeping the rotational resistance of these 2N number of piston crankshaft for reciprocating substantially constant, and may be lighter crankshaft omitted counterweight, obtained an effect that.

Further, in the air pump 130, the opening angle between the one cylinder 134 and the other cylinder 136 is 180 °. However, the opening angle around the axis S of the N cylinders and the remaining N cylinders is set as the opening angle. Even when the angle is larger than 0 ° and smaller than 180 ° (when arranged in a V shape), the phase difference between the crankpin to which the N pistons are connected and the crankpin to which the remaining N pistons are connected is 0 °. If this is set, the effects of maintaining the rotational resistance of the crankshaft for reciprocating the 2N pistons, and reducing the weight of the crankshaft by omitting the counterweight can be obtained in the same manner as in the opposite arrangement. It is done.
[Second Embodiment]
(Configuration of sealing / pump-up device)
FIG. 4 shows a tire sealing / pump-up device according to a second embodiment of the present invention. Similar to the first sealing / pump-up device 30, the sealing / pump-up device 230 repairs the tire with a sealing agent when the tire is punctured without replacing the tire and the wheel. The internal pressure is pumped up to the pressure. In the sealing / pump-up device 230 according to the second embodiment, the same parts as those in the first sealing / pump-up device 30 are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 4, the sealing / pump-up device 230 includes a box-shaped casing 232 as an outer shell, and the sealing agent 36 is provided in the casing 232 from the liquid container 234 to the inside of the tire 20. A liquid supply pump 236 for supplying the liquid is disposed. In the vicinity of the bottom of the liquid agent container 234, a discharge port 235 is provided for discharging the stored sealing agent 16 to the outside.

  The liquid supply pump 236 has a liquid agent inlet port 238 and a liquid agent supply port 240 that are open to the outside. The liquid agent inlet port 238 is connected to the discharge port 235 of the liquid agent container 234 via the connection pipe 242. Yes. The liquid supply pump 236 sucks the sealing agent 36 in the liquid agent container 234 through the connection pipe 242 when operating, and discharges the sealing agent 36 from the liquid agent supply port 240 while pressurizing the sealing agent 36. The liquid supply pump 236 has a liquid supply port 240 connected to the suction port 62 of the gas-liquid switching valve 60 via a liquid supply pipe 244. On the other hand, the air supply port 44 of the air pump 34 is connected to the suction port 61 of the gas-liquid switching valve 60 via the air pipe 246.

  In the sealing / pump-up device 230 according to this embodiment, the sealing agent 36 is sucked from the liquid agent container 234 by the liquid supply pump 236, and the sealing agent 36 is fed into the tire 20 through the joint hose 66. Is adopted. Accordingly, only the static pressure of the sealing agent 36 acts on the liquid agent container 234, and the internal pressure of the tire 20 does not directly act on the liquid agent container 234. As a result, as the liquid agent container 234, one having a pressure resistance lower than that of the liquid agent container 40 according to the first embodiment can be used, and it is not necessary to adopt a special airtight structure.

  The liquid supply pump 236 is basically configured as an in-line two-cylinder reciprocating type similar to the air pump 34. However, since the sealing agent 36 has a property as an incompressible fluid, the settings of the opening and closing timings of the intake valve and the exhaust valve, the stroke of the piston, the rotational speed of the crankshaft, and the like are different from those of the air pump 34.

  As shown in FIG. 5, the liquid supply pump 236 is provided with a crankshaft 248 rotatably supported by a bearing (not shown), and is arranged in series along the axial direction of the crankshaft 248. Two cylinders 250 and 252 are provided. In these cylinders 250 and 252, pressurizing chambers 251 and 253, which are columnar spaces, are formed, respectively. Further, as shown in FIG. 5B, a suction port 254 and a discharge port 256 are opened at the tops of the cylinders 250 and 252. The suction port 254 and the discharge port 256 have a suction direction and a discharge direction, respectively. A suction valve 258 and a discharge valve 260 that allow fluid (sealing agent 36) to flow only in the direction are arranged to be openable and closable. Here, the suction ports 254 and the discharge ports 256 of the cylinders 250 and 252 are connected to the liquid agent suction port 238 and the liquid agent supply port 240 through the internal pipes 262 and 264, respectively.

  As shown in FIG. 5A, pistons 266 and 268 are accommodated in cylinders 250 and 252 so as to be reciprocally movable along a radial direction centering on axis S of crankshaft 248, respectively. The pistons 266 and 268 are alternately arranged in a suction direction (arrow V direction) for expanding the internal volume of the pressurizing chambers 251 and 253 and a discharge direction (arrow E direction) for reducing the internal volume of the pressurizing chambers 251 and 253. Moving. At this time, when the pistons 266 and 268 move in the suction direction in the pressurization chambers 251 and 253, the sealing agent 36 is sucked into the pressurization chambers 251 and 253 through the suction port 254, and the pistons 266 and 268 move in the discharge direction. When moved, the sealing agent 36 in the pressurizing chambers 251 and 253 is pressurized and discharged from the discharge port 256 by the pistons 266 and 268.

  The crankshaft 248 is formed with three crank portions 270, 272, and 274 each formed in a disc shape, and the crank portion 270 and the crank portion 272 are connected by a crank pin 276, and the crank portion 272 And the crank portion 274 are connected by a crank pin 278. Here, the dimension from the axis S to the crankpin 276 is equal to the dimension from the crankpin 278, and the phase difference between the crankpin 276 and the crankpin 278 in the rotational direction about the axis S is 180 °. Is set to

  The two pistons 266 and 268 are connected to the crankshaft 248 via connecting rods 280 and 282. Here, the connecting rods 280 and 282 are rotatably connected to the pistons 266 and 268 at one end portions thereof via piston pins 284 provided on the pistons 266 and 268, and the other end portions thereof are connected to the crankshaft 248. The crankpins 276 and 278 are connected to each other so as to be relatively rotatable. As a result, when the crankshaft 248 is rotated by torque from a drive motor 288 described later, the rotational movement of the crankshaft 248 is caused by the crankshaft 248 and the connecting rods 280 and 282 to move the piston 266 along the radial direction about the axis S. , 268 reciprocating motion, the pistons 266, 268 move alternately in the cylinders 250, 252 in the suction direction and the discharge direction (arrow E direction).

  At this time, in the liquid supply pump 236, the two cylinders 250 and 252 are arranged in series along the axial direction of the crankshaft 248, and the crankpin 276, which is a connection point between the piston 266 and the crankshaft 248, and the piston Since the phase difference with respect to the crank pin 276 that is a connection point of the 266 with the crankshaft 248 is set to 180 °, when one piston 266 moves in the intake direction in the cylinder 250, the other piston 268 Moves in the discharge direction in the cylinder 252 and when one piston 266 reaches one dead center in the cylinder 250, the other piston 268 reaches the other dead center in the cylinder 252.

  As shown in FIG. 5A, a DC drive motor 288 is connected to the crankshaft 248 via a speed reducer 290 so that torque can be transmitted. When DC power is supplied from the power supply circuit 78 (see FIG. 4), the drive motor 288 transmits torque corresponding to the current value to the crankshaft 248 via the speed reducer 290 and rotates the crankshaft 248 in one direction. Let

(Operation and action of sealing / pump-up device)
Next, an operation procedure for repairing the punctured tire 70 using the sealing / pump-up device 230 according to the present embodiment will be described.

  When puncture occurs in the tire 70, first, the operator connects the joint hose 66 to the punctured tire 70 by screwing the adapter 68 to the tire valve 22 of the tire 20. Next, the operator inserts the plug 82 at the tip of the power cable 80 into a socket of a cigarette lighter of the vehicle, and then presses the start / stop button 74 on the operation panel 70. In conjunction with this, the power supply circuit 78 communicates the suction port 62 of the gas-liquid switching valve 60 to the discharge port 63 and operates the liquid supply pump 236 in conjunction with this. As a result, the liquid supply pump 236 sucks the sealing agent 36 in the liquid agent container 234 into the cylinders 250 and 252 and pressurizes the sealing agent 36 sucked into the cylinders 250 and 252 with the pistons 266 and 268 while supplying liquid. 244, the gas-liquid switching valve 60 and the joint hose 66 are supplied into the tire 20.

  When the operator completes the injection of a predetermined amount of the sealing agent 36 from the liquid container 234 into the tire 20, the operator presses the gas-liquid switching button 74 on the operation panel 70. The completion of the injection of the predetermined amount of the sealing agent 36 may be determined by using the time from the start of injection as a parameter, and a transparent window portion is provided in the liquid agent container 40, and an operator can remove the sealing agent 36 through the window portion. The injection amount may be confirmed.

  In conjunction with the depression of the gas-liquid switching button 74, the power supply circuit 78 stops the liquid supply pump 236, and after switching the communication destination of the discharge port 63 of the gas-liquid switching valve 60 from the suction port 62 to the suction port 61, The air pump 34 is activated. Thereby, the compressed air supplied from the air pump 34 is supplied into the tire 20 through the air pipe 246, the gas-liquid switching valve 60 and the joint hose 66, and the tire 20 is inflated by increasing the internal pressure of the tire 20.

  Thereafter, when the operator confirms that the internal pressure of the tire 20 has become the specified pressure using a pressure gauge (not shown) provided in the air pump 34, the operator presses the start / stop button 72 again. In conjunction with this, the power supply circuit 78 stops the power supply to the air pump 34. Next, the operator removes the adapter 68 from the tire valve 22 and disconnects the joint hose 66 from the tire 20, and after performing preliminary travel as in the case of the first embodiment, sealing and pump-up as necessary. The apparatus 230 pumps up the tire 20 to a specified pressure.

  In the liquid supply pump 236 of the sealing / pump-up device 230 according to the embodiment of the present invention described above, the two cylinders 250 and 252 are arranged in series along the axial direction of the crankshaft 248 and the piston 266 According to the first embodiment, the phase difference between the crank pin 276 that is the connection point with the crank shaft 248 and the crank pin 278 that is the connection point between the crank shaft 248 of the piston 268 is set to 180 °. Similarly to the case where the air pump 34 is operated, even if one piston 266 moves in the discharge direction and the movement load of the piston 266 in the cylinder 250 relatively increases, at this time, the remaining one The piston 268 moves in the suction direction, and the movement load of the piston 268 in the cylinder 252 is reduced. , The load fluctuations of the two pistons 266 and 268 cancel each other, the rotational resistance of the crankshaft 248 that reciprocally moves the two pistons 266 and 268 is kept substantially constant, and the drive motor that rotates the crankshaft 248 Since the drive current flowing through the 288 can also be kept substantially constant, a current substantially equal to the rated current value that can be supplied by the battery of the vehicle can always be supplied to the drive motor 288, and the pistons 266 and 268 are further connected to the crankshaft 248. Since it is not necessary to provide a counterweight for canceling the inertial force, the weight of the crankshaft 248 can be reduced and the load on the drive motor can be reduced.

  Therefore, the sealing / pump-up device 230 according to the present embodiment can also efficiently reduce the time for injecting the sealing agent 36 into the tire 20 by increasing the supply efficiency of the sealing agent 36 to the pneumatic tire by the liquid supply pump 236. In addition, the efficiency of supplying compressed air to the tire 20 by the air pump 34 can be increased, and the pump-up time for the tire 20 can be efficiently shortened.

  In the sealing / pump-up device 230 according to the present embodiment, only the case where the liquid supply pump 236 uses two cylinders arranged in series has been described, but the number of cylinders is 2N (N is a natural number). In an air pump in which the cylinders are arranged in series in a line along the axial direction of the crankshaft (for example, four or six cylinders), the connection points of the N pistons with the crankshaft ( If the phase difference between the connecting point (crankpin) between the crankpin) and the crankshafts of the remaining N pistons is set to 180 °, the N pistons can be moved in the same manner as the feed pump 236 of this embodiment. Since the remaining N pistons move in the suction direction when moving in the discharge direction, the influences of load fluctuations of the 2N pistons cancel each other, and these 2N Maintaining the rotational resistance of the crankshaft for reciprocating the piston to substantially constant, and may be lighter crankshaft omitted counterweight, obtained an effect that.

  In the sealing / pump-up device 230 according to the present embodiment, the air compressor 34 in which cylinders are arranged in series is used as the air compressor. Instead of the air compressor 34, the air according to the modified example of the first embodiment is used. Even if the compressor 134 is used, it goes without saying that the effect of improving the efficiency of supplying compressed air to the tire 20 and effectively shortening the pump-up time for the tire 20 can be obtained.

(Modification of feed pump)
Next, a modified example of the feed pump applicable to the sealing / pump-up device 230 according to the second embodiment of the present invention will be described. FIG. 6 shows a liquid supply pump 300 applicable to the sealing / pump-up device 230 in place of the liquid supply pump 236 shown in FIG. In the liquid supply pump 300 according to this modification, the same reference numerals are given to the same parts as those of the liquid supply pump 236 shown in FIG.

  The feed pump 300 is configured as a reciprocating type with two opposed cylinders. As shown in FIG. 6, the feed pump 300 has a crankshaft 302 rotatably supported by a bearing (not shown). Two cylinders 304 and 306 extending along the radial direction of the crankshaft 302 are provided. Here, one cylinder 304 and the other cylinder 306 are arranged at different locations along the circumferential direction centering on the axis S of the crankshaft 302, and the axes of these cylinders 304 and 306 are arranged. The opening angle centered on S is 180 °.

  In these cylinders 304 and 306, pressurizing chambers 405 and 407, which are cylindrical spaces, are formed, respectively. Further, as shown in FIG. 6B, a suction port 308 and a discharge port 310 are opened at the tops of the cylinders 304 and 306. The suction port 312 and the discharge port 310 are connected to the suction port 308 and the discharge port 310, respectively. A valve 314 is arranged to be openable and closable. As shown in FIG. 6A, pistons 328 and 330 are housed in cylinders 304 and 306, respectively, so as to be capable of reciprocating along a radial direction centering on the axis S of the crankshaft 302.

  The crankshaft 302 is formed with two crank portions 316 and 318 each formed in a disk shape, and the crank portion 316 and the crank portion 318 are connected by a crank pin 328. The two pistons 328 and 330 are connected to the crankshaft 302 via connecting rods 320 and 322. Here, the two connecting rods 320 and 322 are connected to the pistons 328 and 330 in such a manner that one ends of the connecting rods 320 and 322 are relatively rotatable via piston pins 324 and 326 provided on the pistons 328 and 330, respectively. Are connected to one crankpin 328 in the crankshaft 302 so as to be relatively rotatable. Accordingly, when the crankshaft 302 is rotated by the torque from the drive motor 288, the rotational motion of the crankshaft 302 is converted into the reciprocating motion of the pistons 328 and 330 along the radial direction around the axis S, and the piston 328 , 330 alternately move in the suction direction and the discharge direction (arrow E direction) in the cylinders 304, 306.

  At this time, in the liquid supply pump 300, the two cylinders 304 and 306 are arranged so as to extend in the radial direction of the crankshaft 302, respectively, and the opening angle between one cylinder 304 and the other cylinder 306 is 180 °. At the same time, the pistons 328 and 330 respectively disposed in the two cylinders 304 and 306 are connected to the same crank pin 328 in the crankshaft 302, so that one piston 328 moves in the suction direction in the cylinder 304. When the other piston 330 moves in the discharge direction in the cylinder 306 and one piston 328 reaches one dead center in the cylinder 304, the other piston 330 moves in the other direction in the cylinder 306. Reach dead center.

  Also in the liquid supply pump 300 described above, as in the case where the liquid supply pump 236 shown in FIG. 5 is used, the suction step of sucking the sealing agent 36 from the outside into the cylinders 304 and 306 and the sealing in the cylinders 304 and 306 are performed. The discharge process of discharging from the cylinders 304 and 306 while pressurizing the agent 36 can always be performed in parallel by the same number (one) of pistons, and the inertial force of the two pistons 328 and 330 Therefore, it is not necessary to provide a counterweight for canceling the inertia force of the pistons 328 and 330 on the crankshaft 302. Therefore, the sealing / pump-up device 230 using the liquid supply pump 300 also increases the supply efficiency of the sealing agent 36 to the pneumatic tire by the liquid supply pump 236, thereby efficiently injecting the sealing agent 36 into the tire 20. In addition, the efficiency of supplying compressed air to the tire 20 by the air pump 34 can be increased, and the pump-up time for the tire 20 can be efficiently shortened.

  In addition, as the liquid supply pump 300 according to the modified example, only the cylinder having two cylinders opposed to each other has been described, but the total number of cylinders is 2N (N is a natural number) (for example, 4, 6 cylinders). The N cylinders are arranged in series in a line along the axial direction of the crankshaft, and the remaining N cylinders are arranged along the circumferential direction around the axis S of the crankshaft 302. Even in a liquid supply pump arranged in series in a different part from the N cylinders, the phase difference between the crankpin to which the N pistons are connected and the crankpin to which the remaining N pistons are connected is 0 °. As in the air pump 130 according to the modified example, when the N pistons move in the discharge direction, the remaining N pistons move in the suction direction. Cancel the influence of load fluctuation to each other, keeping the rotational resistance of these 2N number of piston crankshaft for reciprocating substantially constant, and may be lighter crankshaft omitted counterweight, obtained an effect that.

  Further, in the liquid supply pump 300, the opening angle between the one cylinder 304 and the other cylinder 306 was 180 °, but the opening centered around the axis S of the N cylinders and the remaining N cylinders. Even when the angle is larger than 0 ° and smaller than 180 ° (V-shaped arrangement), the phase difference between the crankpin to which the N pistons are connected and the crankpin to which the remaining N pistons are connected is also determined. If the angle is set to 0 °, the rotational resistance of the crankshaft for reciprocating the 2N pistons can be kept substantially constant, and the effect of being able to reduce the weight of the crankshaft by omitting the counterweight is the same as in the case of opposing arrangement. Is obtained.

  A conventional single cylinder and opposed two-cylinder air pump (Comparative Examples 1 and 2), an in-line two-cylinder air pump shown in FIG. 2 (Example 1), and an opposed two-cylinder air pump shown in FIG. 3 (Example 2). Table 1 below shows the results of operation while applying no pressure to the discharge ports or applying pressure load (= 0.25 MPa).

ここで、比較例１〜２及び実施例１〜２のエアポンプでは、それぞれピストン径／ストロークを３０ｍｍ／１６ｍｍに設定すると共に、吸入口及び吐出口の口径を４．２ｍｍに設定し、駆動モータとしてはマブチ製のＲＳ５５０ＶＣ７５２５を用い、駆動モータからクランクシャフトへのギヤ比は、それぞれ０．１６９に設定した。また電源としては車両に搭載されるバッテリー（定格電圧：１２Ｖ、定格電流：１５Ａ）を用い、このバッテリーと駆動モータとの間に定格電流が１５Ａに設定されたヒューズを介装し、このヒューズを電流遮断器とした。

Here, in the air pumps of Comparative Examples 1 and 2 and Examples 1 and 2, the piston diameter / stroke is set to 30 mm / 16 mm, and the inlet and outlet diameters are set to 4.2 mm. Used RS550VC7525 manufactured by Mabuchi, and the gear ratio from the drive motor to the crankshaft was set to 0.169, respectively. In addition, a battery (rated voltage: 12V, rated current: 15A) mounted on the vehicle is used as a power source, and a fuse with a rated current set to 15A is interposed between the battery and the drive motor. A current breaker was used.

  As is clear from the above [Table 1], the air pumps of Examples 1 and 2 can obtain approximately twice as much compressed air as that of Comparative Example 1 under both no load and load conditions. The current is only about 1.5 times that of Comparative Example 1. Further, in the air pumps of Examples 1 and 2, although the compressed air substantially equivalent to that of Comparative Example 2 is obtained under no load and under the load condition, the driving current required at this time is reduced to about the same as that of Comparative Example 2. It can be suppressed to 75%. Further, in Comparative Example 2, the current value (maximum current value) of the drive current increased to nearly 20 A, so the fuse (15 A) interposed between the battery and the drive motor was blown out in a relatively short time.

It is a block diagram which shows the structure of the sealing and pump-up apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the air pump applicable to the sealing pump-up apparatus shown by FIG. It is a block diagram which shows the modification of the air pump applicable to the sealing pump-up apparatus shown by FIG. It is a block diagram which shows the structure of the sealing and pump up apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the liquid supply pump applicable to the sealing pump-up apparatus shown by FIG. It is a block diagram which shows the modification of the feed pump applicable to the sealing pump-up apparatus shown by FIG. 1 is a configuration diagram showing a conventional air pump applicable to a tire sealing / pump-up device.

Explanation of symbols

30 Sealing / pump-up device 34 Air pump 76 Current breaker (power supply means)
78 Power supply circuit (power supply means)
80 Power cable (Power supply means)
82 plug (power supply means)
84 Crankshaft 84 Drive motor 86, 88 Cylinder 90 Suction port 92 Discharge port 108 Crank pin (connection point)
110 Crankpin (connection point)
120, 122 Piston 124 Drive motor 130 Air pump 132 Crankshaft 134, 136 Cylinder 142 Suction port 144 Discharge port 146, 148 Piston 158 Crank pin (connection point)
230 Sealing / pump-up device 236 Liquid supply pump 300 Liquid supply pump

Claims (6)

A pump-up device for increasing the internal pressure of a pneumatic tire by supplying compressed air into the pneumatic tire,
A plurality of cylinders each having a suction port for sucking outside air and a discharge port for discharging compressed air and connected to a pneumatic tire;
Each of the plurality of cylinders is disposed so as to be able to reciprocate, and when moving in the suction direction for expanding the volume in the cylinder, air is sucked into the cylinder from the suction port to reduce the volume in the cylinder. A piston that discharges from the discharge port while compressing air in the cylinder when moving in the discharge direction;
A plurality of the pistons are connected to each other, rotated by torque from the outside, and a crankshaft that alternately moves the pistons in the suction direction and the discharge direction;
A drive motor that is coupled to the crankshaft so as to be able to transmit torque and that receives power from the outside to rotate the crankshaft;
The number of installed cylinders is 2N (N is a natural number), and the 2N cylinders are arranged in series along the axial direction of the crankshaft,
A phase difference between a connection point of the piston disposed in each of the N cylinders with the crankshaft and a connection point of the piston disposed in each of the remaining N cylinders. A pump-up device that is set to 180 °. A pump-up device for increasing the internal pressure of a pneumatic tire by supplying compressed air into the pneumatic tire,
A plurality of cylinders each having a suction port for sucking outside air and a discharge port for discharging compressed air and connected to a pneumatic tire;
Each of the plurality of cylinders is disposed so as to be able to reciprocate, and when moving in the suction direction for expanding the volume in the cylinder, air is sucked into the cylinder from the suction port to reduce the volume in the cylinder. A piston that discharges from the discharge port while compressing air in the cylinder when moving in the discharge direction;
A plurality of the pistons are connected to each other, rotated by torque from the outside, and a crankshaft that alternately moves the pistons in the suction direction and the discharge direction;
A drive motor that is coupled to the crankshaft so as to be able to transmit torque and that receives power from the outside to rotate the crankshaft;
The number of cylinders installed is 2N (N is a natural number), and N cylinders out of 2N are arranged in series along the axial direction of the crankshaft, and the remaining N cylinders are connected to the crankshaft. And arranged in series in a different part from the N cylinders along the circumferential direction centered on the
Positions of connecting points of the pistons arranged in the N cylinders with the crankshaft and connecting points of the pistons arranged in the remaining N cylinders with the crankshafts, respectively. A pump-up device characterized in that the phase difference is set to 0 °.   3. The pump-up device according to claim 1, further comprising power supply means connected to a battery mounted on the vehicle and supplying power from the battery to the drive motor. A sealing agent injection device for inhaling a sealing agent contained in a liquid container and injecting the sealing agent into a pneumatic tire while pressurizing the sealing agent,
An inlet that is connected to the liquid container and sucks a sealing agent from the liquid container, and a discharge port that discharges the sealing agent sucked from the liquid container in a pressurized state and is connected to a pneumatic tire, respectively. A plurality of formed cylinders;
A plurality of cylinders are arranged so as to be able to reciprocate, and when moving in the suction direction for expanding the volume in the cylinder, a sealing agent is sucked from the liquid container into the cylinder through the suction port, and the cylinder A piston that discharges from the discharge port while pressurizing the sealing agent in the cylinder when moving in the discharge direction to reduce the volume inside;
A plurality of the pistons are connected to each other, rotated by torque from the outside, and a crankshaft that alternately moves the pistons in the suction direction and the discharge direction;
A drive motor that is coupled to the crankshaft so as to be able to transmit torque and that receives power from the outside to rotate the crankshaft;
The number of installed cylinders is 2N (N is a natural number), and the 2N cylinders are arranged in series along the axial direction of the crankshaft,
A phase difference between a connection point of the piston disposed in each of the N cylinders with the crankshaft and a connection point of the piston disposed in each of the remaining N cylinders. A sealing agent injecting apparatus characterized by being set to 180 °. A sealing agent injection device for inhaling a sealing agent contained in a liquid container and injecting the sealing agent into a pneumatic tire while pressurizing the sealing agent,
An inlet that is connected to the liquid container and sucks a sealing agent from the liquid container, and a discharge port that discharges the sealing agent sucked from the liquid container in a pressurized state and is connected to a pneumatic tire, respectively. A plurality of formed cylinders;
Each of the cylinders is disposed so as to be reciprocally movable, and when moving in a suction direction for expanding the volume in the cylinder, a sealing agent is sucked into the cylinder from the liquid container through the suction port, and the cylinder A piston that discharges from the discharge port while pressurizing the sealing agent in the cylinder when moving in the discharge direction to reduce the volume inside;
A plurality of the pistons are connected to each other, rotated by torque from the outside, and a crankshaft that alternately moves the pistons in the suction direction and the discharge direction;
A drive motor that is coupled to the crankshaft so as to be able to transmit torque and that receives power from the outside to rotate the crankshaft;
The number of installed cylinders is 2N (N is a natural number), and N cylinders out of 2N are arranged in series along the axial direction of the crankshaft, and the remaining N cylinders are connected to the crankshaft. And arranged in series in a different part from the N cylinders along the circumferential direction centered on
Positions of connecting points of the pistons arranged in the N cylinders with the crankshaft and connecting points of the pistons arranged in the remaining N cylinders with the crankshafts, respectively. A sealing agent injection device characterized in that the phase difference is set to 0 °.   6. The sealing agent injection device according to claim 4, further comprising power supply means connected to a battery mounted on the vehicle and supplying power from the battery to the drive motor.

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