JP2008035750A - Spraying device - Google Patents

Abstract

Disclosed is a spraying device that is simple in structure and low in cost, and that can move a tank up and down lightly and quickly by one-touch manual operation.
A tank 4 is mounted on a rotary 2 of a self-propelled work vehicle, and stores a sprayed material therein, a spraying mechanism 5 provided at a lower part of the tank 4, and a lower part of the spraying mechanism 5. A spraying device formed by the spraying hose 6, wherein the tank 4 is swingably attached to the rotary 2 using a parallel link mechanism 20 so that the tank 4 can move up and down while maintaining a horizontal posture. 20 is provided with an elastic member 21 that biases the elasticity in the standing direction when the parallel link mechanism 20 is turned upright.
[Selection] Figure 1

Description

  This invention is applied to a self-propelled work vehicle such as a tractor, and a spraying device for spraying powdered or granular sprayed material such as fertilizer and seeds to straw, paddy, field, etc. The present invention relates to a spraying device in which the height position of a tank for storing an object is variable, and when the sprayed material is replenished, the tank can be operated at a position lower than its original height.

  The above-mentioned spraying device is attached to a rotary located at the rear of a self-propelled work vehicle such as a tractor, and the tank taken out via a spraying mechanism provided at the bottom of the tank while running the self-propelled work vehicle. The sprayed material inside is guided by a spraying hose and sprayed by being naturally dropped onto a paddy, a paddy field, a field or the like (see Patent Document 1).

  Such a spraying device sprays the sprayed material induced by the spraying hose by natural fall, so it is necessary to disperse the sprayed material evenly by placing the tank as high as possible to reduce the bending of the spraying hose. Become.

  Moreover, since the capacity | capacitance tank of the spraying apparatus attached to the rear part of a self-propelled work vehicle has a capacity | capacitance limit, it is necessary to replenish a sprinkling material during a spraying operation.

  In the above-mentioned spraying device, if the tank is at a high place, it is difficult to replenish the sprayed product to the tank during the spraying work, so it is necessary to place the tank below the original height when refilling the sprayed product. A spraying device has been proposed that allows it to be made.

  In the conventional spraying device capable of moving the above-described tank up and down, the lower ends of a pair of arms on the front and rear of the hitch member attached to the rear part of the rotary lie down from the standing state toward the rear of the rotary. The tank is attached to a connecting member that is pivoted so that it can be raised and lowered, and is pivoted to the upper end of both arms, and the rod of the hydraulic jack provided below the hitch member and the lower end of the one arm are connected via a link. When the hydraulic jack is contracted, the pair of arms lie down substantially horizontally toward the rear of the rotary so that the tank is in the lowered position, and the replenishment work of the sprayed material to the tank can be easily performed at a low position.

When the hydraulic jack is extended, the pair of arms rises, the tank rises in a horizontal position, is held at the original height position, and the sprinkled material can be sprayed (see Patent Document 2).
Japanese Utility Model Publication No. 4-6620 Utility Model Registration No. 3075574

  By the way, as described above, the hydraulic jack used for the vertical movement of the tank requires a plurality of lever operations for the expansion / contraction operation, which requires labor and time for the vertical movement of the tank. Because it is located at the rear lower part of the rotary, the lower part becomes lower, and there is a risk of colliding with the protruding part of the ground.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a spraying device that can move a tank up and down lightly and labor-saving lightly and quickly by one-touch manual work and that does not cause a collision with a protruding portion of the ground.

  In order to solve the above-described problems, the present invention is provided with a tank that is attached to a self-propelled work vehicle and that stores scattered matter therein, a spraying mechanism provided at a lower portion of the tank, In a spraying device formed by a spraying hose attached to the lower part, the spraying device is mounted on a self-propelled work vehicle so as to be able to move up and down while maintaining a horizontal posture using a parallel link mechanism. The link mechanism is provided with an elastic member that reduces the load when lifting the spraying mechanism by biasing the elasticity in the standing direction during the standing rotation.

  The above-mentioned spreading device is attached to the upper part of the rotary of the self-propelled work vehicle with a parallel link mechanism, and the swinging direction of the spreading device by the parallel link mechanism can be arranged along the lateral width direction of the rotary. .

  Further, one end of the elastic member is coupled to the self-propelled work vehicle side pivot point of one link of the parallel link mechanism, and the other end is coupled to the tank side pivot point of the other link of the parallel link mechanism. The elastic member may be formed of a gas spring or a coil spring that always contracts between the two coupling points.

  Here, the mounting structure of the spraying device to the rotary is provided with a bifurcated lower mounting bracket on the fixed bracket fixed on the outer cylinder of the drive shaft provided at the upper portion of the rotary, and the horizontal width of the rotary is mounted on this lower mounting bracket. The lower end of the pair of links arranged along the direction is pivoted with a pin, and a bifurcated upper mounting bracket is attached to the upper end of the pair of links with a pin. A parallel link mechanism that can be horizontally laid down from the state of standing on the outer cylinder to the outside in the lateral width direction of the rotary is configured, and a tank holding frame that is fitted by fitting a tank on the upper surface of the upper mounting bracket is fixed, Each of the links and the tank holding frame are provided with handles for raising and lowering.

  The pair of links have the same length, and when they are upright, the link is located so that the pivot point of the link located on the outer side of the rotary is located below the link located on the inner side. The link spring does not cause interference when it falls, and the gas spring or coil spring is contracted so that the lower pivot point of the link located outside and the upper pivot point of the link located inside are obliquely connected. Thus, the elasticity of the standing direction is urged to the parallel link mechanism.

  According to the present invention, the spraying device is mounted on a self-propelled work vehicle so as to be able to move up and down while maintaining a horizontal posture using a parallel link mechanism, and the parallel link mechanism is mounted in the upright direction during the upright rotation. Since an elastic member that urges elasticity is provided, the vertical movement of the spraying device can be performed by the combination of the parallel link mechanism and the elastic member, the structure is simple and the manufacturing cost is low, and the heavy spraying device is elasticized after replenishment work. By the elasticity of the member, it can be lifted lightly by hand and returned to a high position, and the vertical movement operation of the spraying device can be efficiently performed with one touch.

  Further, by combining an elastic member with the parallel link mechanism, there is no occurrence of a protruding portion at the rear lower part of the rotary, and there is no trouble in traveling of the self-propelled work vehicle.

  Furthermore, by arranging the swinging direction of the spraying device along the horizontal width direction of the rotary, it is convenient because replenishment work of the sprayed material to the spraying device can be performed from the front and rear and the lateral direction of the self-propelled work vehicle. is there.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in the figure, a self-propelled work vehicle 1 such as a tractor has a rotary 2 connected to the rear, and a spraying device 3 is attached to both sides in the width direction at the upper part of the rotary 2 in a symmetrical arrangement. Yes.

  The spraying device 3 includes a hopper-like tank 4 for storing sprayed material therein, a spraying mechanism 5 provided at the lower part of the tank 4, and a plurality of spraying hoses 6 attached to the lower part of the spraying mechanism 5. The powdered and granular sprinkles such as fertilizer and seeds stored in the tank 4 are naturally dropped by the spray hose 6 and sprayed on the straw, paddy field, field and the like.

  The mounting structure for attaching the spraying devices 3 located on the left and right to the upper part of the rotary 2 is the same, and the outer cylinder 7 of the drive shaft provided on the upper part of the rotary 2 is sandwiched from above and below and fixed by fastening with bolts. A bracket 8, a lower mounting bracket 11 mounted on the fixing bracket 8, and a pair of brackets 10 protruding in a bifurcated manner on the upper surface of the base plate 9, and lower ends of the lower mounting bracket 11 with pins 12 and 13 And a pair of links 14 and 15 arranged in the horizontal width direction of the rotary 2, and a bifurcated upper mounting bracket pivotally supported by pins 16 and 17 on the upper ends of the pair of links 14 and 15 18 and a flat U-shaped tank holding frame 19 that is fixed in a horizontal state to a mounting base 18a provided on the upper surface of the upper mounting bracket 18 and that is fitted and attached to the tank 4 to form the pair. In tank 14, 15 and upper and lower mounting brackets 11 and 18 constitute the water lying losses can become parallel link mechanism 20 from the state erected in the lateral direction outer side of the rotary 2 onto the outer tube 7.

  The pair of links 14 and 15 have the same length, and the pin 12 serving as a pivot point of the link 14 positioned on the outer side in the lateral width direction of the rotary 2 when the link 14 and 15 are standing upright is the pin 13 of the link 15 positioned on the inner side. The link 14 and 15 do not interfere with each other during horizontal lying down.

  The parallel link mechanism 20 is provided with an elastic member 21 that reduces the load when lifting the spraying device 3 by biasing the elasticity in the standing direction when the links 14 and 15 are turned upright.

  The elastic member 21 uses a gas spring or a coil spring as shown in the figure, and this elastic member 21 has a pin 12 that serves as a lower pivot point of the link 14 located outside and an upper pivot of the link 15 located inside. The pin 17 that is a stopping point is contracted so as to be obliquely connected, and the pins 12 and 17 are attracted to urge the parallel link mechanism 20 in the standing direction.

  In the above mounting structure, the lower mounting brackets 11 on both sides are configured such that the base plates 9 are coupled to each other by a gate-shaped frame 22 and a handle 23 for raising and lowering is provided on the outer piece of the tank holding frame 19.

  On the lower surface of the tank holding frame 19, the stopper rod 24 is pivotally suspended in its hanging state so as to be swingable in the undulating direction of the links 14 and 15 at a position close to the upper mounting bracket 18. When the stopper plate 25 is fixed to the upper end of the sprayer and the spraying device 3 in which the tank 4 is emptied is lowered as shown in the right side of FIG. By tilting 24 by hand and locking its lower notch stepped portion to the stopper plate 25, the parallel link mechanism 20 that is going to stand up due to the elasticity of the elastic member 21 is tilted slightly upward from the horizontal. In this state, the rotation in the standing direction is locked, and the lowering position of the spraying device 3 is maintained even if the hand is released.

  Moreover, when the spraying device 3 is held in the lowered position and the tank 4 is filled with sprayed material, the weight of the spraying device 3 increases, so that the elasticity of the elastic member 21 is overcome and the parallel link mechanism 20 is linked. 14 and 15 are rotated slightly downward in a substantially horizontal state in which they overlap with each other, so that the stopper plate 25 is also lowered to be separated from the stopper rod 24, and the lower end notch stepped portion is unlocked from the stopper plate 25, The parallel link mechanism 20 can be turned in the standing direction.

  As shown in FIG. 3, an upright holding plate 26 that abuts against the vertical column 22 a of the portal frame 22 is fixed to the upper mounting bracket 18 to push up the spraying device 3 to the raised position. Thus, the upright state of the parallel link mechanism 20 is held by the abutment of the upright holding plate 26 against the vertical column 22a of the portal frame 22.

  Although not shown in the drawings, in order to stabilize the upright posture of the parallel link mechanism 20, the upright holding plate 26 is a bolt screwed from the upright holding plate 26 to the vertical column 22a in a contact state of the portal frame 22 with the vertical column 22a. It is possible to detachably fix it by detachable or to detachably fix it from the upright holding plate 26 to the vertical column 22a by a latch fitting attached to one of the upright holding plate 26 or the vertical column 22a.

  In addition, the handle 27 for raising and lowering the spraying device 3 by directly raising and lowering the parallel link mechanism 20 at a position close to the upper end on the outer surface of the one link 14 in the parallel link mechanism 20 directly with an inclination angle with respect to the link 14. It is fixed.

  The spraying device of the present invention is configured as described above. When the self-propelled work vehicle 1 is traveled and sprayed material is sprayed from the spraying device 3, it is shown on the left side of FIG. 1, FIG. 2, and FIG. Further, by pushing up the tank 4, the links 14 and 15 of the parallel link mechanism 20 are brought upright, and the tank 4 is held at the original height position for spraying.

  At this time, the upright holding plate 26 abuts on the vertical column 22a of the gate-shaped frame 22 so that the parallel link mechanism 20 to which the upright elasticity is given by the elastic member 21 stands up stably, and the stopper rod 24 is suspended by its own weight. is doing.

  Next, when the tank 4 becomes empty and the tank 4 is replenished with the sprayed material, the handle 4 is held in the state where the tank 4 is held at the original height, and the horizontal direction of the rotary 2 is increased. When the link 14 and 15 are pulled down outward, the links 14 and 15 fall outward with the lower end pins 12 and 13 as fulcrums, and the elastic member 21 expands when the distance between the upper and lower coupling points to the links 14 and 15 increases. By rotating the mounting bracket 18 in a horizontal state, the tank 4 is lowered while rotating outward along the lateral width direction of the rotary 2 in a horizontal posture, and the links 14 and 15 immediately before being substantially horizontal. As shown on the right side of FIG. 4, when the stopper rod 24 is pushed and the lower end is locked to the stopper plate 25, the rotation of the parallel link mechanism 20 in the standing direction is locked. As shown on the right side of Tank 4 becomes lowered position, as shown in FIG. 5, supplying work of spraying material to this tank 4 will be performed comfortably with a low position.

  The elasticity of the elastic member 21 is set so as to push up the weight of the spraying device 3 in which the tank 4 is empty, so that the parallel link mechanism 20 rotates in the standing direction by the engagement of the stopper rod 24 and the stopper plate 25. Thus, the lowered position is maintained even when the hand is released from the handle 23 or 27.

  Moreover, the parallel link mechanism 20 arranges the swinging direction of the spraying device 3 along the horizontal width direction of the rotary 2 so that the replenishment work of the sprayed material to the lowered tank 4 is performed by the self-propelled work vehicle 1. This can be done from the front and back and from the side.

  When the sprayed material is filled in the tank 4, the weight of the spraying device 3 increases, so that the elasticity of the elastic member 21 is overcome and the parallel link mechanism 20 is slightly rotated downward in a substantially horizontal state where the links 14 and 15 overlap. As a result, the stopper plate 25 is also lowered to be separated from the stopper rod 24, and the lower end notch stepped portion is automatically unlocked from the stopper plate 25.

  In order to return the tank 4 filled with the sprinkling material to the original height position, it is sufficient to hold the handle 23 or 27 and apply a force to push the tank 4 back upward. 13 is pivoted about a fulcrum, and at this time, the contraction elasticity of the elastic member 21 urges the links 14 and 15 to be elastic in the standing direction, thereby reducing the load when the tank 4 is pushed up. Even if the tank 4 is replenished with powder and increases in weight, it can be returned to its original raised position with a light force.

  In this way, by combining the elastic member 21 with the parallel link mechanism 20, after the replenishment work, the heavier tank 4 can be lightly lifted by hand with the assistance of the elasticity of the elastic member 21 and returned to the high position. The vertical movement operation of the tank 4 can be efficiently and labor-saving with one touch.

The side view which shows the state at the time of spraying which the tank of the spraying apparatus which concerns on this invention exists in a high position The vertical side view which expands and shows the state at the time of spraying which the tank of the spraying device concerning this invention is in a high position The perspective view which shows the state at the time of tank lowering which shows a parallel link mechanism The front view which shows the state at the time of spraying which the tank of the spraying apparatus which concerns on this invention is in a high position, and the state which pulled down the tank Front view showing the working state of replenishing sprayed tanks in the sprayer's lowered tank

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-propelled work vehicle 2 Rotary 3 Spraying device 4 Tank 5 Spraying mechanism 6 Spraying hose 7 Outer cylinder 8 Fixing bracket 9 Base plate 10 Bracket 11 Lower mounting bracket 12, 13 Pin 14, 15 Link 16, 17 Pin 18 Upper mounting bracket 19 Tank holding frame 20 Parallel link mechanism 21 Elastic member 22 Portal frame 23 Handle 24 Stopper rod 25 Stopper plate 26 Standing holding plate 27 Handle

Claims (3)

  In a spraying device formed by a tank that is attached to a self-propelled work vehicle and that stores sprinkled material therein, a spraying mechanism provided at the bottom of the tank, and a spraying hose attached at the bottom of the spraying mechanism The spraying device is mounted on a self-propelled work vehicle so as to be able to move up and down while maintaining a horizontal posture using a parallel link mechanism, and this parallel link mechanism is provided with elasticity in the standing direction when the stand is turned. A spraying device comprising an elastic member that reduces the load when lifting the spraying mechanism by applying force.   The spraying device is attached to an upper part of a rotary of a self-propelled work vehicle by a parallel link mechanism, and the swinging direction of the spraying device by the parallel link mechanism is arranged along the lateral width direction of the rotary. Item 2. A spraying device according to item 1.   One end of the elastic member is coupled to a self-propelled work vehicle side pivot point of one link of the parallel link mechanism, and the other end is coupled to a tank side pivot point of the other link of the parallel link mechanism. The spraying device according to claim 1 or 2, wherein the member is formed of a gas spring or a coil spring that always contracts between both coupling points.

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