JP2018174740A - Boom sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deterioration and breakage of a side boom and an actuator, facilitate assembling, and compactify a space for achieving an opening/closing function.SOLUTION: When longitudinal inertial force acts on a side boom 11 by the start and stop of a boom sprayer or the traveling of bad roads while the side boom 11 is in an open-state, a shaft 34 of an opening/closing device 20 is made to move in an axial direction, and is buffered by a damper spring 39 and a safe spring 37. When the external force by an obstacle acts on the side boom 11 when traveling in the traveling direction, the side boom 11 is turned to the rear and is buffered by the safe spring 37. As for the runout to the longitudinal direction when the side boom 11 returns to an open position, it is buffered like the inertial force. Components of the opening/closing device 20 are arranged linearly to facilitate assembling. The components are arranged linearly and the need for securing a turning area of an arm and an extension area of a moving element intersecting with a center boom is eliminated, and thereby a space for achieving an opening/closing function is made compact.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a boom sprayer.

  Conventionally, a center boom disposed at the front of the vehicle body and extending in the horizontal direction, an open position pivotally connected to both ends of the center boom with one axis as a fulcrum and aligned with the center boom in the horizontal direction, A boom comprising a side boom movable to a closed position where it is pivoted relative to the boom and folded to the side of the machine body, and an opening / closing device which rotates the side boom to be positioned at an open position and a closed position The sprayer is known (for example, refer patent document 1).

  The opening and closing device of the boom sprayer includes an actuator having a stator (telescopic device 88) fixed to the center boom and a mover (the telescopic device 89) extending back and forth with respect to the stator and intersecting the center boom. The arm is rotatably connected at one end to the center boom and the other end is connected to the arm rotatably connected to the end of the mover, the contact member fixed to the arm, and the contact member. A plurality of disc springs stacked between the bolt head, the head of the bolt and the abutment member, a nut screwed onto the male screw of the bolt and abutted against the abutment member; A coil spring interposed between the end side and the end of the mover and the other end of the arm, and a stopper projecting from the end of the side boom. Then, in Patent Document 1, when the mover extends, the arm pivots and the side boom pivots by 90 ° to be in the closed position, while the mover retracts and the arm pivots to the opposite side. When the side boom pivots by 90 ° and is in the open position aligned with the center boom, the stopper of the side boom abuts against the bolt head and the arm abuts against the stopper body provided on the center boom It has become.

JP 2000-176338 A

  Here, in a state where the center boom and the side boom are linearly arranged, the side boom receives an external force due to an obstacle such as a standing tree and is rotated backward, and then returns to the original position by the biasing force of the coil spring. The stopper of the side boom is in contact with the head of the bolt, and a plurality of disc springs between the head of the bolt and the contact member are supposed to buffer the impact of the side boom. Because the head and the head of the bolt abut directly, the side boom may be deteriorated and broken. Further, when the center boom and the side boom are linearly arranged in this manner, the arm connected to the mover abuts against the stopper body of the center boom, so that the actuator may be deteriorated or damaged. In addition, when moving the side boom between the open position and the closed position, it is necessary to secure the pivoting area of the arm and secure the extension area of the mover extending forward while crossing the center boom. There is also the problem that a certain amount of space is required to achieve the function.

  The present invention has been made to solve such problems, and it is possible to provide a boom sprayer that can prevent deterioration and breakage of a side boom and an actuator, and can make a space achieving an open / close function compact. To aim.

  The boom sprayer (100) according to the present invention is pivoted around the one axis (30) as a fulcrum at the center boom (10) disposed at the front of the fuselage (3) and extending horizontally, and at both ends of the center boom (10). It is possible to move to an open position aligned horizontally in a straight line with the center boom (10) and to a closed position where it is pivoted relative to the center boom (10) and folded to the side of the machine (3) A boom sprayer (100) comprising: a side boom (11); and an opening / closing device (20) for turning the side boom (11) to be positioned at an open position and a closed position, ) Has a stator (31) and a mover (32) moving back and forth with respect to the stator (31) and is disposed on the end side of the center boom (10) along the longitudinal direction of the center boom (10) And An actuator (19), a shaft (34) arranged to extend toward the actuator (19) along the longitudinal direction of the center boom (10), and a center boom (10), the shaft (34) being inserted A support portion (35) for supporting the shaft (34), and a first spring interposed between the end portion (36) of the shaft (34) closer to the actuator (19) and the support portion (35) 37) and a second spring (39) interposed between the other end (38) of the shaft (34) and the support (35), and one end (36) of the shaft (34) ) Is pivotably connected to either the end of the mover (32) or the end (33) of the stator (31) with the first axis (48) parallel to the one axis (30) as a fulcrum The end of the mover (32) or the stator The other end of the 31) (33), the side boom (11), is characterized in uniaxial (30) and pivotally be coupled as a fulcrum parallel second axis (50).

  According to such a boom sprayer (100), with the side boom (11) in the open position, the boom sprayer (100) starts or stops, travels on a rough road, etc. When the inertial force in the longitudinal direction works, the shaft (34) supported by the support portion (35) of the center boom (10) moves in the axial direction, and the inertial force to the rear of the side boom (11) is the shaft Buffered by the first spring (37) between one end (36) of the (34) and the support (35), the forward inertial force is supported by the other end (38) of the shaft (34) Buffered by the second spring (39) between the part (35). In addition, when an obstacle such as a standing tree collides with the side boom (11) while traveling in the traveling direction (while advancing), the first spring (the shaft (34) moves to the other axial end side) 37) is compressed and flexed, the side boom (11) pivots rearward with the one axis (30) as a fulcrum, and the first spring (37) buffers the external force. Then, the shake in the front-rear direction when the side boom (11) returns to the open position is buffered by the first spring (37) and the second spring (39) as in the case of the above-mentioned inertial force. As described above, when the side boom (11) is in the open position, it is possible to buffer inertial force, external force, and shake, and as a result, deterioration and breakage of the side boom (11) and the actuator (19) can be prevented. , Can protect obstacles. In addition, because the components of the switchgear (20) are arranged in a straight line, assembly is easy. In addition, since the components of the opening / closing device (20) are linearly arranged in this manner, it is not necessary to secure the extension region of the mover extending forward, crossing the pivot region of the arm and the center boom of the prior art. The space for achieving the opening and closing function becomes compact.

  Here, the side boom stopper (27) provided on the side boom (11) and the side boom stopper (27) provided on the center boom (10) when the side boom (11) is in the closed position And a center boom stopper (28) for abutting and preventing further rotation of the side boom (11), the stopper (27, 28) being in contact with each other, the center boom of the actuator (19) When the remaining stroke of the mover (32) is contracted, the shaft (34) moves toward the end of the mover (32) by the remaining stroke while the second spring (39) is contracted. For this reason, in the state where the stoppers (27, 28) are in contact with each other, the impact load does not act on the actuator (19) even if the remaining stroke is shortened.

  As described above, according to the present invention, it is possible to provide a boom sprayer that can prevent deterioration and breakage of a side boom and an actuator, is easy to assemble, and has a compact space for achieving the open / close function.

It is the perspective view which looked at the boom sprayer which concerns on embodiment of this invention from diagonally upper front. FIG. 2 is an enlarged perspective view showing an end of the opening / closing device and the center boom in FIG. 1 and an end of a side boom. It is a fragmentary sectional view which shows the part except the actuator of the switchgear in FIG.1 and FIG.2. It is the figure which looked at the opening and closing device and the end of a center boom, and the end of a side boom from the upper part in the state where a side boom was located in a closed position, and is a figure for explaining operation of a opening and closing device. It is the figure which looked at the opening and closing device and the end of a center boom, and the end of a side boom from the upper part in the state where a side boom was located in an open position, and is a figure for explaining operation of a opening and closing device.

  Hereinafter, a preferred embodiment of a boom sprayer according to the present invention will be described with reference to the attached drawings. FIG. 1 is a perspective view of a boom sprayer according to an embodiment of the present invention viewed obliquely from the upper front, and FIG. 2 is an enlarged perspective view showing an end of an opening / closing device and a center boom and an end of a side boom. 3 is a partial sectional view showing a portion of the opening and closing device excluding the actuator, and FIG. 4 is a top view of the end of the opening and closing device and the center boom and the end of the side boom when the side boom is in the closed position. FIG. 5 is a view for explaining the operation of the opening and closing device, and FIG. 5 is a view of the end of the opening and closing device and the center boom and the end of the side boom as viewed from above when the side boom is in the open position FIG. 8 is a diagram for explaining the operation of the switchgear.

  As shown in FIG. 1, a boom sprayer 100 as a passenger management device is a self-propelled type, and includes a vehicle 1 and a boom nozzle device 2 for spraying a chemical solution from the vehicle 1. In the following description, “front”, “rear”, “left”, and “right” are directions based on the boom sprayer 100.

  The vehicle 1 includes a vehicle body frame 3 as a substantially rectangular airframe (frame) long in the front-rear direction. A traveling device 4 that enables the vehicle body frame 3 to travel is provided below both sides in the left-right direction orthogonal to the front-rear direction of the vehicle body frame 3. A driver's seat 5 is disposed at the front of the vehicle body frame 3, and an engine room 6 is disposed at the rear, and a chemical solution tank 7 for storing a chemical solution between the driver's seat 5 and the engine room 6. Is placed.

  The traveling device 4 includes traveling wheels and a crawler 15. The traveling wheels are sprocket wheels (drive wheels: drive wheels) 16 disposed at the rear of the vehicle body frame 3 and below the engine room 6 and on both sides in the left and right direction, and at the front of the vehicle body frame 3 below the driver's seat 5 and in the lateral direction It has an idler wheel (a free wheel: guide wheel) 17 disposed on both sides and a plurality of road wheels (traveling wheels) 18 on the ground side. The wheels 16 to 18 are rotatably supported on the vehicle body frame 3 side, and the crawler 15 is wound around the wheels 16 to 18. The traveling device 4 can travel by driving an engine in the engine room 6.

  A four-bar linkage 8 is installed at the front end of the vehicle body frame 3 so as to extend forward. The boom nozzle device 2 is supported by a vehicle body frame 3 via a four-bar link device 8. By operating the four-bar linkage 8 by the expansion and contraction of the motor-driven hydraulic cylinder 9 as an actuator, the center boom 10 of the boom nozzle device 2 fixed to the front link of the four-bar linkage 8 is moved up and down. It has become. Thus, the vertical position of the boom nozzle device 2 is adjusted.

  The center boom 10 of the boom nozzle device 2 extends in the horizontal direction and extends in the lateral direction of the vehicle body frame 3. Side booms 11 and 11 are connected to the left and right ends of the center boom 10, respectively. The side booms 11 are pivotable relative to the center boom 10 with a pivoting center shaft 30 (see FIG. 2) as an axis located at both ends of the center boom 10 as an axis. A nozzle pipe 12 is attached to each of the center boom 10 and each side boom 11, and a plurality of chemical solution spraying nozzles 13 are provided in each nozzle pipe 12 along the longitudinal direction.

  Each side boom 11 is driven by an opening / closing device 20 (see FIG. 2) including an actuator 19 and is folded as shown and located at a closed position as shown in FIG. It is stored at a position in a state of being slanted backward and upward. When the chemical solution is sprayed, the side booms 11, 11 are rotated and spread out in a straight line with respect to the center boom 10 and positioned at the open position (see FIG. 5).

  Here, the connection structure between the center boom 10 and the side boom 11 and the opening / closing device 20 will be specifically described.

  First, the connection structure between the center boom 10 and the side boom 11 will be described. As shown in FIG. 2, a center boom bracket 21 having a U-shaped cross section is fixed to the end of the center boom 10. The center boom bracket 21 has a central portion 22 having a U-shaped cross section fixed to the end of the center boom 10, and the side portions 23 project perpendicularly from both ends of the central portion 22 to face each other. It is arranged to be open.

  A U-shaped side boom bracket 24 is also fixed to the end of the side boom 11. Similarly to the center boom bracket 21, the side boom bracket 24 also includes a central portion 25 and side portions 26 and 26. As shown in FIG. 5, the side boom bracket 24 generally faces the center boom bracket 21 with the side boom 11 in the open position, and the center portion 22 of the center boom bracket 21 and the center portion 25 of the side boom bracket 24 Are disposed parallel to each other and opened in the front-rear direction (vertical direction in the drawing).

  As shown in FIG. 2, the center boom bracket 21 and the side boom bracket 24 are connected via the pivot center shaft 30, and the side boom 11 is rotated with the pivot center shaft 30 as a fulcrum with respect to the center boom 10. It is possible to move. Further, among the upper side portions 26 of the side boom bracket 24, an end closer to the actuator 19 and closer to the center boom 10 (the end on the lower left side in FIG. 4, the end on the upper left side in FIG. 5) A side boom stopper is in contact with the center boom stopper 28.

  At the rear of the upper end surface of the center boom 10, there is provided a center boom stopper 28 which protrudes further rearward than the rear and protrudes upward and abuts on the central portion 22 of the center boom bracket 21 (see FIGS. 4 and 5). ). The center boom stopper 28 is formed in a flat plate shape, and when the side boom 11 is in the closed position shown in FIG. 2, the side boom stopper 27 abuts to prevent further rotation of the side boom 11. belongs to.

  The opening / closing device 20 is disposed behind the center boom 10, and operates the actuator 19 for rotating the side boom 11 to move it to the open position and the closed position, and the force acting on the actuator 19 and the side boom 11. And a buffer 29 for buffering.

  The actuator 19 has a stator 31 and a mover 32 that advances and retracts (extends / retracts) with respect to the stator 31. Here, an electrohydraulic cylinder is adopted as being particularly preferable here. It may be The actuator 19 is disposed along the longitudinal direction of the center boom 10 and on the end side. Then, the end 33 of the stator 31 is connected to the back side of the side boom 11 (details will be described later).

  As shown in FIGS. 2 and 3, the shock absorber 29 is provided on a shaft 34 (see FIG. 3) arranged to extend along the longitudinal direction of the center boom 10 and toward the actuator 19, and provided on the center boom 10. And a safety spring (coil spring: first spring) 37 interposed between the support portion 35 for supporting the shaft 34 and the one end 36 of the shaft 34 near the actuator 19 and the support portion 35; And a damper spring (coil spring: second spring) 39 interposed between the other end 38 of the shaft 34 and the support portion 35.

  Specifically, as shown in FIG. 3, male screws 40 and 41 are respectively provided on both ends of the shaft 34, and the female screw 43 of the stroke adjustment fitting 42 is provided on the male screw 40 on one end 36. It is screwed in and fixed. The fixed position is such that the center boom 10 and the side booms 11 and 11 form a straight line when the mover 32 of the actuator 19 is extended as much as possible. A cylindrical spacer 44 which is extrapolated to the shaft 34 and inserted into the safety spring 37 is disposed on the support 35 side of the stroke adjustment fitting 42. At one end side of the spacer 44, a flange portion 46 is provided which is in contact with the stroke adjustment fitting 42 via a nut 45, and the safety spring 37 is disposed between the flange portion 46 and the support portion 35. A nut 47 is screwed into and fixed to the male screw 41 on the other end 38 of the shaft 34, and the damper spring 39 is disposed between the nut 47 and the support portion 35.

  As shown in FIG. 2, the stroke adjustment fitting 42 constituting one end side 36 of the shaft 34 is connected to the end of the mover 32 via a first shaft 48 parallel to the rotation center shaft 30, The stroke adjustment fitting 42 and the end of the mover 32 are pivotable about the first shaft 48. Further, the end 33 of the stator 31 is connected to the bracket 49 on the back surface of the side boom 11 via the second shaft 50 parallel to the rotation center shaft 30, and fixed with the second shaft 50 as a fulcrum The end 33 of the child 31 and the side boom 11 are rotatable. The shaft 34, the springs 37 and 39, the mover 32, the stator 31 and the like are arranged in a straight line along the longitudinal direction of the center boom 10.

  In such a boom sprayer 100, at the time of non-operation, as shown in FIG. 1, FIG. 2 and FIG. It is folded and stored.

  At the time of work, the actuator 19 of the opening / closing device 20 is driven to extend the mover 32 (forward), and as shown in FIG. It moves to the open position, and is aligned with the center boom 10 in the left-right direction and is spread out so as to form a straight line with the center boom 10. In this state, while traveling, the power sprayer of the engine room 6 shown in FIG. 1 is driven, the chemical solution in the chemical solution tank 7 is supplied to the nozzle pipe 12, and the chemical solution is sprayed from the nozzle 13. In addition, the nozzle 13 is abbreviate | omitted in FIG.4 and FIG.5.

  In particular, in the present embodiment, with the side boom 11 positioned at the open position shown in FIG. When the inertial force in the front-rear direction shown in the figure acts, the shaft 34 supported by the support portion 35 of the center boom 10 moves in the axial direction, and the inertial force to the rear of the side boom 11 is supported by one end 36 of the shaft 34 Buffered by the safety spring 37 between the portion 35 and forward, the inertial force is buffered by the damper spring 39 between the other end 38 of the shaft 34 and the support 35.

  In addition, when an external force that causes an obstacle such as a standing tree to collide with the side boom 11 acts while traveling in the traveling direction (while advancing), the safety spring 37 is compressed by movement of the shaft 34 to the other axial end side. While being bent, the side boom 11 pivots rearward with the pivoting center shaft 30 as a fulcrum, and the safety spring 37 buffers the collision force. Then, the shake in the front-rear direction when the side boom 11 returns to the open position is buffered by the safety spring 37 and the damper spring 39 as in the case of the above-described inertial force.

  As described above, according to the present embodiment, it is possible to buffer the inertial force, the external force, and the shake in the state where the side boom 11 is located at the open position, and as a result, the deterioration and breakage of the side boom 11 and the actuator 19 can be prevented. And protect the obstacles.

  Further, according to the present embodiment, since the components of the opening / closing device 20 are linearly arranged, assembly is easy. Further, as described above, since the components of the opening / closing device 20 are linearly arranged, it is not necessary to secure the extension region of the moving element extending forward, crossing the pivoting region of the prior art arm or the center boom. The space to achieve the has become compact.

  Then, when the work is completed, the actuator 19 of the opening / closing device 20 is driven to retract the mover 32, and as shown in FIG. As shown in FIGS. 2 and 4, the side boom stopper 27 of the side boom 11 abuts on the center boom stopper 28 of the center boom 10, and the side boom 111 is in the closed position.

  When the remaining stroke of the mover 32 of the actuator 19 is contracted in such a state where the stoppers 27 and 28 are in contact with each other, the shaft 34 remains toward the end of the mover 32 while the damper spring 39 is contracted. Move for the stroke of For this reason, in the state where the stoppers 27 and 28 are in contact with each other, the impact load does not act on the actuator 19 even if the remaining stroke is shortened.

  As mentioned above, although the present invention was concretely explained based on the embodiment, the present invention is not limited to the above-mentioned embodiment, For example, in the above-mentioned embodiment, safety spring 37 and damper spring 39 are preferred as especially preferable. For example, a coil spring is used, but another spring such as a disc spring may be used.

  Moreover, in the said embodiment, although it is set as the type which hangs the crawler 15 around traveling wheels, such as a sprocket wheel 16 and an idler wheel 17, etc., the traveling device 4 is applicable also to the type which travels with front and rear wheels. It is.

  In the above embodiment, one end 36 of the shaft 34 and the end of the mover 32 are rotatably connected with the first shaft 48 as a fulcrum, and the end 33 of the stator 31 and the side boom 11 Is rotatably connected with the second shaft 50 as a fulcrum but, conversely, the one end 36 of the shaft 34 and the end 33 of the stator 31 are rotatably connected with the first shaft 48 as a fulcrum It is also possible to configure so that the end of the mover 32 and the side boom 11 can be pivotably connected with the second shaft 50 as a fulcrum, even if configured in this manner as in the above embodiment. Play an important role.

  The present invention is also applicable to, for example, a boom sprayer of the type mounted on a tractor or the like.

  Reference Signs List 3 body frame (body) 10 10 center boom 11 side boom 19 actuator 20 opening and closing device 27 side boom stopper 28 center boom stopper 30 rotation center axis (uniaxial) 31 ... Stator, 32 ... mover, 33 ... end of stator, 34 ... shaft, 35 ... support part, 36 ... shaft one end side, 37 ... safety spring (first spring), 38 ... shaft other end side, 39: Damper spring (second spring), 48: first axis, 50: second axis, 100: boom sprayer.

Claims (2)

A center boom (10) disposed at the front of the fuselage (3) and extending horizontally, and pivotably connected to both ends of the center boom (10) with a single axis (30) as a fulcrum, 10) A side boom (11) movable to an open position aligned in the lateral direction in a straight line and a closed position rotated relative to the center boom (10) and folded to the side of the machine (3) A boom sprayer (100) comprising: an opening / closing device (20) for rotating the side boom (11) to position the side boom (11) at the open position and the closed position,
The switchgear (20) is
A stator (31) and a mover (32) moving back and forth with respect to the stator (31) are disposed on the end side of the center boom (10) along the longitudinal direction of the center boom (10) The actuator (19)
A shaft (34) arranged to extend along the longitudinal direction of the center boom (10) toward the actuator (19);
A support portion (35) provided on the center boom (10), the shaft (34) being inserted and supporting the shaft (34);
A first spring (37) interposed between the support (35) and one end (36) of the shaft (34) near the actuator (19);
And a second spring (39) interposed between the other end (38) of the shaft (34) and the support (35);
The one end (36) of the shaft (34) is parallel to the one axis (30) at either the end of the mover (32) or the end (33) of the stator (31). The first shaft (48) is pivotably connected as a fulcrum,
The other end of the end of the mover (32) or the end (33) of the stator (31) supports a second axis (50) parallel to the one axis (30) at the side boom (11) A boom sprayer (100), characterized in that it is pivotably connected. A side boom stopper (27) provided on the side boom (11);
When the side boom (11) is provided at the center boom (10) and the side boom (11) is positioned at the closed position, the side boom stopper (27) abuts, and further rotation of the side boom (11) A boom sprayer (100) according to claim 1, characterized in that it comprises a center boom stop (28) for blocking.

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