CN100546736C - Tube Bending Equipment - Google Patents

Abstract

The present invention provides a bending device capable of reducing the number of actuators, being easy to operate by hand, and capable of producing a tube subjected to high-precision bending even by an unskilled worker. In the state where the pipe (P) is accommodated between the groove of the bending die (12) and the groove of the pressure piece (14), the pipe (P) is restrained by the jig (15) and the bending die (12). The pressure member (14) bends the pipe (P) rotationally along the peripheral surface of the bending die (12), wherein the bending die (12) is movably provided in such a manner as to retreat from the bending position of the pipe (P), so that The bending die (12) moves to a bending position in conjunction with the bending operation of the pressure member (14), and retreats from the bending position in conjunction with the return operation of the pressure member (14).

Description

Tube Bending Equipment

The patent application of the present invention is a divisional application of the patent application for invention whose filing date is July 27, 2004, application number is 200480021893.2, and the title of the invention is "bending device for pipe".

technical field

The present invention relates to a pipe bending device, and more particularly to a pipe bending device suitable for manually bending a pipe.

Background technique

The basic configuration of the bending part of the pipe bending device is to include: a bending die that is arranged on a machine frame, has an arc-shaped peripheral surface, and has a groove formed on the peripheral surface, and is rotatable along the peripheral surface of the bending die. A pressure member provided on a machine frame having a groove at a position facing the groove of the bending die, and a state in which a tube is accommodated between the groove of the bending die and the groove of the pressure member provided on the frame This pipe is restrained by the jig of the above-mentioned bending die (for example, refer to Japanese Patent Application Laid-Open No. 10-211524 or Japanese Patent Laid-Open No. 2-284722).

In addition, in such a pipe bending device, the pipe is restrained to the bending die by clamps in a state where the pipe is accommodated between the groove of the bending die and the groove of the pressure member, and the pressure member is made to move along the bending die in this state. The tube is bent by rotating (revolving) its peripheral surface.

However, for example, a fuel supply pipe of an automobile needs to be piped in a narrow space limited in an engine room, so the pipe needs to be piped by three-dimensionally bending the pipe. In order to bend such a pipe by the above-mentioned bending processing device, the above-mentioned bending operation is performed, that is, the pipe is restrained by the clamp to the bending die in the state where the pipe is accommodated between the groove of the bending die and the groove of the pressure member. In this state, the pipe is bent by revolving the pressure member along the peripheral surface of the bending die, and then, the feeding operation is performed to advance the pipe by a predetermined amount and at the same time rotate the pipe by a predetermined angle, and then perform the above-mentioned bending operation again. Tube bending. Such bending operation and feeding operation are repeated to obtain a three-dimensionally curved tube.

In this way, in the above-mentioned pipe bending apparatus, revolution of the pressure member, restriction and release of the pipe by the clamp, feeding of the pipe, rotation of the pipe, and the like must be performed.

In the automatic pipe bending processing device, actuators are provided on the above-mentioned parts respectively, and the pipe can be bent three-dimensionally by controlling these actuators. However, when bending the pipe manually, all the above-mentioned operations must be performed manually. Not only is it cumbersome, but it is also impossible for unskilled workers to produce high-precision tubes.

Contents of the invention

Therefore, it is an object of the present invention to provide a pipe bending device that can reduce the number of actuators in the case of an automatic or semi-automatic bending device, and can perform bending in a manual operation. In some cases, it can be easily operated, and even unskilled workers can produce high-precision tubes.

In the pipe bending processing device of the present invention, there are: a bending die, a pressure piece, and a fixture; the bending die is arranged on a frame, has an arc-shaped peripheral surface, and grooves are formed on the peripheral surface; the pressure piece It is rotatably arranged on the frame along the peripheral surface of the bending die, and has a groove at a position opposite to the groove of the bending die; the clamp is arranged on the frame, and the pipe is accommodated in the Confining the pipe to the bending die in a state between the groove of the bending die and the groove of the pressure member; Next, the pipe is restricted by the clamp and the bending die, and in this state, the pressure member is rotated along the peripheral surface of the bending die to bend the pipe, and it is characterized in that: the bending die can The bending position of the bending position is retracted so that the bending die moves from the retreating position to the bending position with the bending action of the pressure piece, and the bending die moves from the bending position to the retreating position with the reset action of the pressure piece Location.

Generally, in a pipe bending apparatus, the pipe needs to be advanced by a predetermined amount and, if necessary, rotated by a predetermined angle when performing the next bending process. The reason is that since the pipe is located in the groove of the bending die in the state where the bending process is completed, if the pipe is turned by a predetermined angle in this state, the side wall of the groove prevents the pipe from turning.

According to the bending device of the present invention, after the previous bending process is completed, when the pressure member is returned, the bending die can retreat from the bending position and be separated from the pipe in accordance with the movement of the pressure member. Therefore, even if the pipe is turned immediately after the previous bending process is completed, there is no fear that the pipe will come into contact with the groove of the bending die.

Therefore, by feeding the tube before the next bending process, the feeding and turning of the tube can be performed simultaneously, shortening the feeding operation time, and improving work efficiency.

Here, in the pipe bending apparatus of the above-mentioned invention, the bending die and the pressure member may be moved by a single drive mechanism, respectively. An operation plate is rotatably arranged on the frame, and the bending die and the pressure member are moved by rotating the operation plate. Furthermore, cam followers may be respectively arranged on the bending die and the pressure member, and at the same time, an operation plate may be rotatably arranged on the above-mentioned frame, and a cam follower corresponding to the two cam followers may be respectively formed on the operation plate. The cam groove opposite to the piece is used to move the bending die and the pressure piece respectively by rotating the operation plate.

In addition, in the pipe bending processing device of the present invention, a bending die, a pressure member, and a clamp are provided; the bending die is provided on a frame, and has an arc-shaped peripheral surface, and grooves are formed on the peripheral surface; The peripheral surface of the bending die is rotatably arranged on the frame, and there is a groove at a position opposite to the groove of the bending die; the clamp is arranged on the frame, and the tube is accommodated in the frame The pipe is confined to the bending die in a state between the groove of the bending die and the groove of the pressure member; the pipe is accommodated in a state between the groove of the bending die and the groove of the pressure member The pipe is restrained by the jig and the bending die, and the pressure member is rotated along the peripheral surface of the bending die in this state to bend the pipe. A stopper plate having a plurality of stopper pieces is provided, and the amount of movement of the pressure member is selectively restricted by moving the stopper plate.

Generally, in a tube bending machine, the bending angle of the tube is determined by the amount of rotation of the pressure member. Furthermore, in the pipe bending apparatus, a stopper is provided to limit the amount of bending of the pipe, and the accuracy of the bending angle is improved by setting the amount of rotation of the pressure member by the stopper. However, when the stopper is fixed, when the bending angle is different, it cannot correspond to it.

According to the pipe bending apparatus of the present invention, the stopper piece can be changed to a predetermined position by moving the stopper plate.

Therefore, for example, when a single tube needs to be bent at a plurality of places and the bending amounts are different, by moving the stopper to a predetermined position, these different bending processes can be continuously performed, and the work efficiency can be improved.

Here, in the pipe bending device of the above-mentioned invention, a gear that rotates in association with the rotation of the pressure member may be provided, and a sliding member having a rack may be disposed on the frame so that the tooth The bar is engaged with the gear, and the stop plate is arranged such that a plurality of stop pieces selectively face one end of the slide member.

In this case, processing of tubes requiring different bending angles can be continuously performed.

In addition, in the pipe bending apparatus of the above invention, a shaft may be rotatably supported by the frame, and the stopper plate may be provided on the shaft.

At this time, stop pieces corresponding to a plurality of different bending angles of one pipe are arranged around the stop plate, and the corresponding stop pieces are moved in sequence to be opposed to the sliding member by rotating the stop plate. In this way, the bending process of multiple tubes can be carried out continuously.

In addition, in the pipe bending apparatus of the above invention, the stopper plate may be composed of a plurality of divided pieces, and the divided pieces of the stopper plate may be detachably attached to the shaft.

In this case, attachment and detachment of the stopper plate to the shaft is facilitated.

In addition, in the pipe bending apparatus of the above invention, the rotation shaft of the pressure member and the shaft of the stopper plate may be connected (connected) to each other by a one-way clutch.

At this time, since the stopper piece of the stopper plate is moved to a predetermined position in conjunction with the bending operation of the pressure piece, the bending operation becomes relatively easy, and no special actuator for moving the stopper plate is required. Therefore, the simplification of the device is realized, thereby reducing the cost of the device and making it compact.

The disposition position of the above-mentioned one-way overrunning clutch may be any part of the power transmission mechanism between the rotation shaft of the pressure member and the shaft of the stopper plate.

For example, a gear that rotates in association with the rotation of the pressure member is provided, a gear is provided on the shaft of the stopper plate, and a sliding member having a rack is provided on the frame so that the The rack is meshed with the two gears, and the rotational motion of the rotating shaft is transmitted to the shaft of the stop plate through the gears, sliding parts, and gears, so that the stop plate is rotated. In the case of a mechanism, it only needs to be provided between the rotation shaft of the pressure member and the stopper plate.

In this case, it is preferable that the one-way clutch is arranged between the sliding member and the shaft of the stopper plate.

In addition, in the pipe bending processing device of the present invention, a bending die, a pressure member, and a clamp are provided; the bending die is provided on a frame, and has an arc-shaped peripheral surface, and grooves are formed on the peripheral surface; The peripheral surface of the bending die is rotatably arranged on the frame, and there is a groove at a position opposite to the groove of the bending die; the clamp is arranged on the frame, and the tube is accommodated in the frame The pipe is confined to the bending die in a state between the groove of the bending die and the groove of the pressure member; the pipe is accommodated in a state between the groove of the bending die and the groove of the pressure member The pipe is restrained by the jig and the bending die, and the pressure member is rotated along the peripheral surface of the bending die in this state to bend the pipe. Provide a rotatable feeding table equipped with a chuck, and at the same time, a cam groove is formed parallel to the moving direction of the feeding table, and a pin is arranged on the feeding table so that the front end of the pin is aligned with the moving direction of the feeding table. At the same time, the pin is connected with the chuck, and the pin moves along the cam groove with the action of advancing the feed table, and the movement is transmitted to the The chuck is rotated chuckingly.

Generally, in a pipe bending apparatus, when bending is performed continuously, the pipe is advanced by a predetermined amount and, if necessary, turned by a predetermined angle before the next bending.

According to the bending machine of the present invention, since the tube can be rotated by a predetermined angle as the feed table advances, the operability is good, and since the angle of the tube is set by the grooved cam, the accuracy is improved. In addition, since at least a special actuator for rotating the pipe is not required, the device can be simplified, thereby reducing the cost of the device and making it compact.

Here, in the pipe bending apparatus of the above-mentioned invention, a long columnar member may be disposed on the frame, the cam groove may be formed on the peripheral surface of the columnar member, and at the same time, the feed table may be freely rotatable. A pin is provided, and the pin is rotated along the cam groove as the feed table is moved forward, and the chuck is rotated so as to transmit the movement to the chuck.

In this case, it is preferable that the end portion of the columnar member is detachably arranged on the frame, and in this case, the columnar member different from the cam groove can be easily replaced.

In addition, in the above case, a pinion gear may be arranged on the rotary shaft of the chuck in the frame, and a rack gear meshing with the pinion gear may be slidably arranged on the feed table. , and at the same time, the pin is arranged on the rack, and the pin moves along the cam groove as the feed table moves forward, and the motion is transmitted to the rack and pinion through the rack and pinion. the chuck, causing it to rotate.

At this time, it is preferable to form the cam groove by arranging blocks having a part of the cam groove on the frame. In this case, the formation of the cam groove is easy, and the cost of locally changing the shape of the cam groove can be reduced.

In addition, in the pipe bending device of the above-mentioned invention, the pin can be freely arranged in the cam groove.

At this time, when the pin is returned to the initial position, the pin can be returned in a state in which the pin is disengaged from the cam groove, and the return operation of the pin is easy.

In addition, in the pipe bending apparatus of the above-mentioned invention, a positioning mechanism for the feed table may be provided.

At this time, the feed rate of the tube is correct, and the machining accuracy is also improved accordingly.

In addition, in the pipe bending processing device of the present invention, a bending die, a pressure member, and a clamp are provided; the bending die is provided on a frame, and has an arc-shaped peripheral surface, and grooves are formed on the peripheral surface; The peripheral surface of the bending die is rotatably arranged on the frame, and there is a groove at a position opposite to the groove of the bending die; the clamp is arranged on the frame, and the tube is accommodated in the frame The pipe is confined to the bending die in a state between the groove of the bending die and the groove of the pressure member; the pipe is accommodated in a state between the groove of the bending die and the groove of the pressure member The pipe is restrained by the jig and the bending die, and the pressure member is rotated along the peripheral surface of the bending die in this state to bend the pipe so as to retract from the bending position of the pipe. The bending die is movably arranged so that the bending die is moved to a bending position in association with the bending action of the pressure member, and retracted from the bending position in association with the reset action of the pressure member; at the same time, in the The frame is movably equipped with a stop plate with a plurality of stop pieces, and by moving the stop plate, the movement amount of the pressure piece is selectively limited, so that the distance between the stop plate and the pressure piece The bend action moves in relation.

According to the bending machine of the present invention, since the stopper plate is moved in conjunction with the bending operation of the pressure member to select the stopper piece of the stopper plate, the operation becomes easy, and there is no need to move the stopper plate. The special actuator, therefore, the device is simplified, thereby the cost of the device is reduced and the structure is compact.

Description of drawings

Fig. 1 is a perspective view conceptually showing the whole of the pipe bending device of the present invention.

Fig. 2 is an exploded perspective view showing a bending portion of the pipe bending device of the present invention.

Fig. 3 is an exploded perspective view showing part of a bending angle setting unit of the pipe bending device of the present invention.

Fig. 4 is a perspective view showing another embodiment of the cam groove of the pipe bending device of the present invention.

Fig. 5 is a perspective view partially showing a modified example of the cam groove shown in Fig. 4 .

Fig. 6 is a perspective view showing another arrangement of the one-way clutch of the pipe bending device of the present invention.

Detailed ways

The present invention will be described below based on the embodiments shown in the drawings.

As shown in FIG. 1 , this pipe bending device includes: a bending unit 10 for bending a pipe, a bending angle setting unit 40 for determining the bending angle of the pipe, and a device for determining the feeding amount and bending direction of the pipe. The feed unit 60 and the like.

As shown in detail in FIG. 2 , the bending portion 10 is provided with a substrate 11 above the frame 1 with a gap therebetween. The base plate 11 is provided with a bending die 12 , a bending die operating piece 13 , a pressure member 14 , and a jig 15 , and a shaft 16 is rotatably supported between the frame 1 and the base plate 11 . Furthermore, one end portion of the operation plate 17 is integrally provided on the shaft 16 .

The bending die 12 has a partially arc-shaped peripheral surface 12a, and an arc-shaped groove 18 for accommodating the pipe P is formed on the peripheral surface 12a. The cross-section of the arc-shaped groove 18 is substantially semicircular. In addition, a hole 19 is perforated in the lower surface of the bending die 12 as indicated by a dotted line in FIG. 2 . And, the bending die 12 is slidably held on the base plate 11 by a guide 20 provided on the base plate 11 .

On the other hand, a shaft hole 21 is provided through one end of the bending die operating piece 13, a pin 22 is erected on the upper surface of the other end, and a cam follower 23 is arranged on the lower surface of the middle portion.

And, the bending die action piece 13, through the arc-shaped long hole 24 formed in the base plate 11, the pin 22 is clearance fit in the hole 19 of the bending die 12, so that the shaft 25 inserted into the shaft hole 21 of the bending die action piece 13 and the through hole The holes 26 provided in the base plate 11 are locked, thereby being rotatably held by the base plate 11 .

The pressure member 14 is in the shape of a roll, and a groove 27 having a semicircular cross section is formed on its peripheral surface 14a. In addition, the pressure member 14 is rotatably held on the plate 28 . In addition, a cam follower 29 is arranged under one end portion of the plate 28 .

In addition, the plate 28 of the pressure member 14 is rotatably supported by inserting the shaft 31 into the shaft hole 30 provided at the other end, and locking its front end with the hole 32 provided in the base plate 11 . Substrate 11.

The jig 15 is a cubic block, and on one side thereof, a groove 33 having a semicircular cross section is formed. In addition, the jig 15 is fixed on the substrate 11 .

The operation panel 17 has a handle 34 at one end and a shaft hole 35 at the other end. In the operation plate 17 , a cam groove 36 is formed around the shaft hole 35 , and a cam groove 37 is formed outside the cam groove 36 . The cam groove 37 is formed in an "L" shape by a groove portion 37a formed concentrically with the shaft hole 35 and a groove portion 37b formed in the escape direction from the shaft hole 35 .

In addition, the operation plate 17 is fitted with the shaft hole 35 and the shaft 16, and is integrated with each other by a key or the like. In addition, the cam groove 36 is engaged with the cam follower 23 of the bending die operating piece 13 , and the cam groove 37 is engaged with the cam follower 29 of the pressure member 14 .

In the bending section 10 thus constituted, at the initial position of the operation panel 17 shown in FIG. Location).

From this state, when the operation plate 17 is operated, the cam follower 23 engaged with the groove portion 36a of the cam groove 36 of the operation plate 17 is pushed against the inner surface of the groove portion 36a (the surface on the shaft hole 35 side). ), the bending die action piece 13 rotates, and the bending die 12 moves to the bending processing position direction through the pin 22 of the bending die action piece 13. On the other hand, the cam follower 29 of the plate 28 is not moved by the cam groove 37 because it engages with the groove portion 37a of the cam groove 37, that is, because it engages with the groove portion 37a formed concentrically with the shaft hole 35. Therefore, the pressure member 14 stays at the initial position.

When the operation plate 17 is further operated, the cam follower 29 is pushed against one side of the groove portion 37b of the cam groove 37, whereby the plate 28 rotates around the shaft 31, and the pressure member 14 revolves relative to the bending die 12. On the other hand, the cam follower 23 reaches the groove portion 36b of the cam groove 36, and moves within the groove portion 36b. However, since the groove portion 36b is formed concentrically with the shaft hole 35, the cam follower 23 is not affected by the movement of the cam groove 36, and therefore, the bending die 12 stays at the bending working position.

In the pipe bending angle setting unit 40 , as shown in detail in FIG. 3 , bearings 41 , 41 are provided on the frame 1 , and a shaft 42 is mounted on these bearings 41 , 41 . One end of the shaft 42 is loosely fitted with a sleeve 44 through a one-way overrunning clutch 43 , and a gear 45 is fixedly arranged at one end of the sleeve 44 .

A disc-shaped stopper plate 46 is disposed at the other end of the shaft 42 . The stopper plate 46 has a cylindrical sleeve 47 at the center. And, this stopper plate 46 and bushing 47, as shown in FIG. 49 is fixed on the shaft 42. In addition, a plurality of stop pieces 50 protrude from the periphery of the stop plate 46 . The stopper piece 50 is formed of a bolt, and the protrusion amount can be set by screwing the bolt with the stopper plate 46 .

In addition, a gear 51 is fixed to the shaft 16 of the operation plate 17 of the bending portion 10 , and a rod member 52 is slidably provided on the frame 1 . Racks 53, 54 are formed on the bar member 52, and these racks 53, 54 mesh with gears 51, 45, respectively.

In addition, in the pipe bending angle setting unit 40 , a gear 55 is fixed to the shaft 16 of the operation plate 17 of the bending unit 10 , and a rod member 56 is slidably provided on the frame 1 . An end portion of the rod-shaped member 56 is arranged to face one of the stopper pieces 50 of the stopper plate 46 . A rack 57 is formed on the bar member 56 and the rack 57 is engaged with the gear 55 .

Then, in the pipe bending angle setting unit 40, when the operation panel 17 is operated in the bending direction, the gear 51 rotates accordingly. The rotation of the gear 51 is transmitted to the rod-shaped member 52 through the rack 53, and the rod-shaped member 52 is moved in one direction. In this way, the gear 45 is rotated by the rack 54 , and then the sleeve 44 is rotated, but its power is blocked by the one-way clutch 43 and cannot be transmitted to the shaft 42 . Therefore, the stopper plate 46 stops at its position without turning.

On the other hand, when the operation panel 17 is operated in the bending direction, the gear 55 rotates accordingly, and the rotation is transmitted to the rod member 56 through the rack 57 to move the rod member 56 toward the stopper plate 46 . And, when the tip of the rod-shaped member 56 abuts against the stop piece 50 of the stop plate 46 , the movement of the rod-shaped member 56 stops there. Therefore, the operation panel 17 can no longer be rotated.

When the bending process is completed and the operation panel 17 is reset, the gear 51 reversely rotates accordingly. The rotation of the gear 51 is transmitted to the rod-shaped member 52 through the rack 53, and the rod-shaped member 52 is moved in one direction. In this way, the gear 45 is rotated by the rack 54 , and the sleeve 44 is further rotated. At this time, the power of the bushing 44 is transmitted to the shaft 42 through the one-way overrunning clutch 43 to make the stop plate 46 rotate. And, the stop piece 50 of the stop plate 46 advances one step in the state where the operation panel 17 is fully reset.

On the other hand, when the operation plate 17 is reset, the gear 55 reversely rotates accordingly, and the rotation is transmitted to the rod member 56 through the rack 57, so that the rod member 56 moves in the direction opposite to the stopper plate 46 . And, in the state where the operation panel 17 is completely reset, the bar member 56 is reset to its original position.

In the feed unit 60 , as shown in FIG. 1 , a feed stand 61 is provided on the frame 1 so as to be slidable, and a handle 62 is rotatably arranged on the feed stand 61 . A chuck 63 is rotatably arranged on the feed table 61 , and claws 64 , 64 for holding the pipe P are arranged on the chuck 63 in a scalable manner. And, the jaws 64 , 64 are scaled by means of the operating lever 65 . In addition, a pulley 66 for rotating the claws 64 , 64 is arranged on the chuck 63 . Further, the pulley 66 transmits power through a pulley 67 provided in parallel with the pulley and a belt 68 wound around these pulleys 66 , 67 .

On the other hand, the frame 1 is provided with a bearing 69 that cantileverly supports the columnar member 70 in a detachable manner. The columnar member 70 has a cam groove 71 on its surface, and the other end is fitted into the center hole 72 of the pulley 67 . In addition, a support plate 73 is protruded from the pulley 67 , and a pin 74 is arranged at the front end of the support plate 73 . The pin 74 is provided on the support plate 73 so as to be retractable, is biased in a protruding direction by a spring not shown, and has its tip fitted into the cam groove 71 of the columnar member 70 .

In addition, a positioning plate 75 is disposed on the frame 1 . A notch 76 is formed on the positioning plate 75 .

When the feed table 61 is advanced by holding the handle 62 , the pipe P held by the claws 64 , 64 of the chuck 63 is fed. Simultaneously, the pin 74 advances along the cam groove 71 of the cylindrical member 70, and the pulley 67 rotates therewith. The rotational motion of the pulley 67 is transmitted to the chuck 63 through the belt 68 and the pulley 66, and the pipe P held by the claws 64 and 64 is rotated. Then, the feed table 61 is positioned by fitting the handle 62 into the next notch 76 .

The tube bending processing apparatus configured in this way is operated as follows to perform tube bending processing.

First, the root end of the pipe P is held on the chuck 63 of the feeding unit 60 so that the front end of the pipe P is positioned between the bending die 12 of the bending unit 10 , the pressure member 14 and the clamp 15 .

In addition, the stop piece 50 of the stop plate 46 of the bending angle setting part 40 is adjusted to the initial position.

In this state, when the operation panel 17 is moved in the bending processing direction, the bending die 12 moves to the bending processing position, and the front end portion of the pipe P is clamped between the jig 15 and the bending die 12, while the pipe P is restrained under pressure. Between the groove 27 of the piece 14 and the groove 18 of the bending die 12.

When the operation plate 17 is further moved in the bending direction, the pressure member 14 revolves along the peripheral surface of the bending die 12 to deform the pipe P along the groove 18 of the peripheral surface 12 a of the bending die 12 .

Simultaneously, the rod member 56 of the bending angle setting portion 40 moves toward the stopper plate 46 . Furthermore, when the front end of the rod-shaped member 56 abuts against the stop piece 50 of the stop plate 46, the operation panel 17 cannot be operated 17 anymore.

When the operation panel 17 is operated in the opposite direction (return direction), the bar member 56 is separated from the stop piece 50 of the stop plate 46 . In addition, as the rod member 52 moves, the shaft 42 rotates through the gear 45 , the sleeve 44 , and the one-way clutch 43 , thereby rotating the stopper plate 46 . Then, when the bar-shaped member 52 returns to its original position, the next stop piece 50 of the stop plate 46 moves to a predetermined position. During this period, the bending die 12 returns to its original position.

Next, the handle 62 of the feeding unit 60 is operated to advance the feeding table 61 . Thus, the pin 74 rotates along the cam groove 71 of the column member 70, and the chuck 63 rotates accordingly. And, if the handle 62 reaches the next notch 76 of the positioning plate 75 , then turn the handle 62 downward to make it fall into the notch 76 .

Therefore, while the pipe P is fed by a predetermined length, it is rotated by a predetermined angle.

By repeating such operations, a three-dimensionally curved pipe P can be obtained.

The pipe P referred to in the present invention includes not only so-called hollow pipes but also solid rods.

In addition, in the bending part 10 of the above-mentioned embodiment, the bending die operation piece 13 is rotatably mounted on the base plate 11, and the cam follower 23 and the pin 22 are arranged on the bending die operation piece 13, and the operation is performed by them. The plate 17 is in contact with the bending die 12 , but the cam follower 23 may be directly provided on the bending die 12 so that the cam follower engages with the cam groove 36 of the operation plate 17 . At this time, it is of course necessary to change the shape of the grooved cam 36 .

In addition, in the bending part 10 of the above-mentioned embodiment, the pressure member 14 is provided on the plate 28, and the plate 28 is rotatably arranged on the base plate 11. At the same time, the cam follower 29 is arranged on the plate 28, The pressure piece 14 is connected with the operation plate 17, but the pressure piece 14 can also be rotatably arranged on the base plate 11, and at the same time, the cam follower 29 is directly arranged on the pressure piece 14, so that the cam follower and the operation plate can be connected. The cam groove 37 of the plate 17 engages.

In addition, in the above-described embodiment, the cam groove 71 is formed on the columnar member 70 in the feed portion 60 , but it may be formed on the upper surface of the plate member 77 as shown in FIG. 4 .

At this time, it is necessary to change the movement of the pin 74 moving in the horizontal direction along the cam groove 71 into the turning movement of the chuck 63 .

Therefore, in the embodiment shown in FIG. 4 , the pinion 78 is fixedly installed on the rear end portion of the rotary shaft 63a of the chuck 63, and at the same time, the rack 79 is slidably arranged on the feed table 61, and the pinion 74 is arranged on the rack, thereby realizing this structure.

In this embodiment, when the feed table 61 is advanced, the pin 74 moves along the cam groove 71 accordingly. Accordingly, the rack 79 moves in a direction (arrow direction) perpendicular to the advancing direction of the feed table 61 . The movement of the rack 79 is transmitted to the pinion 78 to rotate the chuck 63 .

The cam groove 71 formed on the above-mentioned plate-like member 77 can also be as shown in FIG. The cam grooves 71 are formed to fix them to the plate member 77 .

In addition, in the above-mentioned embodiment, in the bending angle setting part 40, a one-way overrunning clutch is arranged between the sleeve 44 provided with the gear 45 and the shaft 42 provided with the stopper plate 46, but it may also be used as shown in FIG. As shown, the gear 43a is formed on the shaft 42, and the claw 43b is arranged on the rod-shaped member 52, whereby the one-way overrunning clutch 43 is constituted.

Industrial Applicability

The pipe bending apparatus of the present invention described above is easy to operate when bending by manual operation, and even an unskilled worker can produce a pipe with high-precision bending, so it is particularly suitable for bending pipes by manual operation. Make a bend.

Claims (7)

1. A bending processing device for a pipe, which is provided with: a bending die, a pressure piece and a clamp; the bending die is arranged on a frame, has an arc-shaped peripheral surface, and grooves are formed on the peripheral surface; the pressure piece is arranged along the The peripheral surface of the bending die is rotatably arranged on the frame, and there is a groove at a position opposite to the groove of the bending die; the clamp is arranged on the frame, and the tube is accommodated in the frame The pipe is confined to the bending die in a state between the groove of the bending die and the groove of the pressure member; the pipe is accommodated in a state between the groove of the bending die and the groove of the pressure member The tube is restrained by the jig and the bending die, and the pressure member is rotated along the peripheral surface of the bending die in this state to bend the tube, characterized in that: A feed table is movably arranged on the frame, and the feed table is equipped with a chuck freely rotatable. At the same time, a cam groove is formed parallel to the moving direction of the feed table. A pin is movably arranged on the table, and the front end of the pin is engaged with the cam groove, and at the same time, the pin is connected with the chuck, and the feed table is moved forward, so that the A pin moves along the cam slot, transferring this motion to the chuck causing it to rotate. 2. The pipe bending processing device according to claim 1, wherein a long columnar member is arranged on the frame, and the cam groove is formed on the peripheral surface of the columnar member, and at the same time, it is rotatable in the The feed table is provided with a pin, and the pin is rotated along the cam groove as the feed table is moved forward, and the motion is transmitted to the chuck to rotate the chuck. 3. The pipe bending apparatus according to claim 2, wherein the end portion of the columnar member is detachably arranged on the frame. 4. The pipe bending device according to claim 1, wherein on the frame, a pinion gear is arranged on the rotary shaft of the chuck, and is slidably arranged on the feed table. A rack meshing with the pinion is provided, and at the same time, the pin is arranged on the rack, and the pin moves along the cam groove as the feed table moves forward, and passes through the rack. And the pinion transmits this movement to the chuck so that the chuck turns. 5 . The pipe bending device according to claim 4 , wherein blocks having a part of the cam groove are arranged on the frame to form the cam groove. 6 . 6 . The pipe bending device according to claim 1 , wherein the pin is arranged in the cam groove so as to be able to move in and out. 7 . 7 . The pipe bending device according to claim 1 , wherein a positioning mechanism for the feeding table is provided. 8 .

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