JP2020191857A - Boom sprayer - Google Patents

Abstract

To provide a boom sprayer capable of reducing the number of components and reducing a weight thereof.SOLUTION: A boom sprayer is configured so that, when a boom sprayer 100 travels or performs a work on an inclined farm field or the like, for example, a vehicle 1 inclined with respect to a horizontal direction and a center boom 19 which intends to become in a horizontal state to a horizontal control frame 18, are fixed in a parallel state to a vehicle lateral direction by uniform pressing of a center boom pressing lock members 26 each of which is provided on each of both sides in a vehicle lateral direction and provided on the horizontal control frame 18, therefore an inclination cylinder and a lock cylinder which has been conventionally used for stopping horizontal control of the center boom 19 and inclining and fixing the center boom 19, can be eliminated.SELECTED DRAWING: Figure 2

Description

The present invention relates to a boom sprayer.

Conventionally, as a boom sprayer for spraying a chemical solution, the one described in Patent Document 1 below is known. In the boom sprayer described in Patent Document 1, a four-section link device is provided at the front of the vehicle, and a front frame is connected to the front link of the four-section link device. Vertical members extending in the vertical direction are fixed to both sides of the front frame in the left-right direction of the vehicle, and one end of the link rod is rotatably connected to the upper portion of the vertical members on one side in the left-right direction of the vehicle. Further, a stator of an inclined cylinder is rotatably connected to an upper portion of a vertical member on the other side in the left-right direction of the vehicle. A center boom extending in the left-right direction of the vehicle is arranged in front of the vehicle, and the other end of the link rod is rotatably connected to one side of the center of the center boom in the left-right direction of the vehicle. The mover of the tilting cylinder is rotatably connected to the other side of the center boom in the left-right direction of the vehicle, and the link rod and the tilting cylinder form a V shape in the front-rear direction of the vehicle. That is, a four-sided (four-section) link structure is formed by the upper part of the front frame forming the upper side, the link rod and the inclined cylinder forming the hypotenuse, and the center boom forming the lower side, and the center boom is relative to the front frame. It is supported so that it can swing in a pendulum shape in the left-right direction of the vehicle, and the center boom is made horizontal by gravity due to horizontal control by the four-sided link structure. In this horizontal state, the mover of the inclined cylinder is located in a degenerate position. The horizontal is the direction that intersects the direction of the earth's gravity at right angles.

In such a boom sprayer, when traveling and working on a flat ground (horizontal field), the vehicle is horizontal without tilting, and the center boom is parallel to the left-right direction of the vehicle and is horizontal. On the other hand, in the case of a sloping field where the field is sloping, the vehicle is tilted, while the center boom swings in the left-right direction of the vehicle by horizontal control by gravity to become horizontal. In this case, the mover of the tilting cylinder is extended, and the center boom is parallel to the tilted vehicle left-right direction. In this state, the movers of the lock cylinders, which are arranged on both sides in the left-right direction of the vehicle and whose stators are fixed to the center boom, extend respectively and come into contact with the left and right vertical members of the front frame, thereby shaking the center boom. It becomes immobile and is fixed (locked). That is, in the case of an inclined field, the extension of the mover of the inclined cylinder causes the center boom to be parallel to the vehicle left-right direction of the inclined vehicle and parallel to the inclined field, and the horizontal control of the center boom by the pendulum is stopped. By doing so, the center boom is prevented from coming into contact with farmland and crops.

JP-A-2017-143768

As described above, in the boom sprayer of Cited Document 1, an inclined cylinder and a lock cylinder are required to stop the horizontal control of the center boom and fix the center boom in a state parallel to the left-right direction of the vehicle, and the number of parts is large. It is required to reduce the weight and weight.

The present invention has been made to solve such a problem, and eliminates the need for the tilt cylinder and the lock cylinder conventionally used for stopping the horizontal control of the center boom and tilting and fixing the center boom. It is an object of the present invention to provide a boom sprayer capable of reducing the number of parts and the weight.

The present invention makes it possible to swing the vehicle (1), the horizontal control frame (18) provided on the vehicle (1) in the left-right direction of the vehicle, and the horizontal control frame (18) in a pendulum shape in the left-right direction of the vehicle. In the boom sprayer (100) provided with a center boom (19) that is supported and becomes horizontal by gravity, center boom pressing lock members (100) provided on the horizontal control frame (18) and arranged on both sides in the left-right direction of the vehicle ( The center boom (19) is provided with the center boom (19) in a state where the center boom (19) is parallel to the left-right direction of the vehicle by evenly pressing the center boom pressing lock member (26) against each center boom (19). It is characterized by being fixed.

According to such a boom sprayer (100), when the boom sprayer (100) is traveling or working on an inclined field or the like, the boom sprayer (100) is horizontal with respect to the vehicle (1) and the horizontal control frame (18) that are inclined with respect to the horizontal. The center boom (19) to be formed is parallel to the vehicle left-right direction by evenly pressing the center boom pressing lock members (26) provided on the horizontal control frame (18) and arranged on both sides in the vehicle left-right direction. It is fixed with. This eliminates the need for the tilt cylinder and lock cylinder that were conventionally used to stop the horizontal control of the center boom (19) and tilt and fix the center boom (19), reducing the number of parts and reducing the weight. it can.

Here, the upper portion of the center boom pressing lock member (26) has an axial center in the vehicle front-rear direction and is rotatably supported with respect to the horizontal control frame (18), and the lower portion thereof is an axis in the vehicle front-rear direction. If the center boom (19) is provided with a roller (27) for holding the heart and pressing the center boom (19), when the center boom (19) is tilted and parallel to the vehicle left-right direction, the roller (27) rotates and the center. Since the boom (19) is pressed, the center boom (19) can be pressed smoothly.

Further, an intermediate portion (28) between the upper portion and the lower portion of the center boom pressing lock member (26) is connected to the driver's seat lever (30) via a pull wire (29), and the driver's seat lever (30) When the center boom pressing lock member (26) presses the center boom (19) by pulling the pull wire (29) by the operation of, the driver's seat lever stops the horizontal control of the center boom (19) by the pendulum. This can be easily performed by the operation of (30).

As described above, according to the present invention, it is possible to eliminate the need for the tilt cylinder and the lock cylinder conventionally used for stopping the horizontal control of the center boom and tilting and fixing the center boom, reducing the number of parts and reducing the weight. Can be changed.

It is a perspective view which looked at the boom sprayer which concerns on embodiment of this invention from the front diagonally above. It is a schematic perspective view which shows the horizontal control device and the lock device in FIG. FIG. 2 is an enlarged view showing a center boom pressing lock member including a roller constituting a horizontal control device and a locking device in FIG. 2, and a pull wire. FIG. 3 is an enlarged view showing a center boom pressing lock member including a roller and a pull wire in FIG.

Hereinafter, preferred embodiments of the boom sprayer according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a boom sprayer according to an embodiment of the present invention viewed from diagonally above and forward, FIG. 2 is a schematic perspective view showing a horizontal control device and a lock device in FIG. 1, and FIG. 3 is a horizontal control device. , The center boom pressing lock member including the roller constituting the locking device and the pull wire are enlarged, and FIG. 4 is an enlarged view showing the center boom pressing lock member including the roller and the pull wire. The boom sprayer of the present embodiment is for spraying a chemical solution on a crop, for example, while traveling in a field, for example. In the following description, "front", "rear", "left", and "right" are directions with reference to the boom sprayer.

As shown in FIG. 1, the boom sprayer 100 is self-propelled and includes a vehicle 1 and a boom device 2 for spraying a chemical solution from the vehicle 1.

A driver's seat 4 is provided in the front portion of the vehicle 1 to form a space for an operator to sit on, and to perform a driving operation by the handle 3, a chemical spraying operation, a lever operation described later, and the like. The driver's seat 4 is covered from above by the roof 5. The roof 5 is supported by roof pillars 6 erected from the sides of the driver's seat 4 on both sides of the vehicle 1 in the left-right direction. A granule spraying device 7 is provided in front of the handle 3. The granule spraying device 7 includes a granule tank 8 for accommodating granules as a drug, and sprays the granules in the granule tank 8 forward from the spray port 9.

An engine room 10 for accommodating an engine is provided at the rear of the vehicle 1. A chemical solution tank 11 for accommodating the chemical solution sprayed from the boom device 2 is mounted between the driver's seat 4 and the engine room 10. A boom receiver 12 extending in the left-right direction of the vehicle is fixed to the upper portion of the chemical solution tank 11. The vehicle 1 includes a pair of front wheels 13 and a pair of rear wheels 14. The front wheels 13 and the rear wheels 14 are rotated by driving the engine. In the present embodiment, since the four-wheel drive is used, the front wheels 13 and the rear wheels 14 rotate, but front-wheel drive and rear-wheel drive may be used.

In front of the driver's seat 4 of the vehicle 1, paired four-bar link mechanisms 15 are arranged in the left-right direction of the vehicle so as to extend forward. The boom device 2 is supported by the vehicle 1 via a four-section link mechanism 15. When the four-bar link mechanism 15 is operated by the expansion / contraction operation of the electrohydraulic cylinder (actuator) 16, the front link 17 extending in the vertical direction of the four-bar link mechanism 15 moves up and down.

As shown in FIGS. 1 to 3, the boom device 2 has a horizontal control frame 18 extending in the left-right direction of the vehicle and fixed to the front link 17, and a vehicle arranged below the horizontal control frame 18 from the horizontal control frame 18. It includes a center boom 19 that is long in the left-right direction, a pair of left and right link rods 20 that connect the horizontal control frame 18 and the center boom 19, and a pair of side booms 21 that are connected to both ends of the center boom 19 ( (See FIG. 1).

As shown in FIG. 1, nozzle pipes 22 are attached to the center boom 19 and the side boom 21, respectively, and each nozzle pipe 22 is provided with a plurality of nozzles 23 for spraying chemicals along the longitudinal direction. There is. When spraying the chemical solution, the side boom 21 is expanded so as to be linear with respect to the center boom 19 from the state shown in FIG. Then, the chemical pressure feeding pump is driven while traveling by driving the engine, and the chemical liquid in the chemical liquid tank 11 is sprayed from the nozzle 23 via the nozzle pipe 22 of the center boom 19 and the side boom 21. The side boom 21 is folded as shown in FIG. 1 when the chemical solution is not sprayed, and is stored in a state of being diagonally raised backward at the lateral position of the vehicle 1. The side boom 21 is housed at both ends of the boom receiver 12 in the retracted state.

As shown in FIGS. 3 and 4, the horizontal control frame 18 is formed in a rectangular tubular shape. As shown in FIGS. 2 and 3, the pair of link rods 20 are arranged closer to the center in the vehicle left-right direction and inside the vehicle left-right direction than the front link 17 fixed to the horizontal control frame 18, and are viewed in the vehicle front-rear direction. It has a C shape. The upper end of the link rod 20 is rotatably connected to the front side and the rear side of the horizontal control frame 18, and the lower end portion thereof is rotatably connected to the front side and the rear side of the center boom 19.

That is, the trapezoidal link 24, which is a kind of four-node link mechanism with the horizontal control frame 18 as the upper side, the center boom 19 as the lower side, and the pair of link rods 20 as the hypotenuse, is configured. The center boom 19 supported by the horizontal control frame 18 via the link rod 20 can swing in a pendulum shape in the left-right direction of the vehicle, and becomes horizontal by horizontal control by gravity. That is, the trapezoidal link 24 constitutes a horizontal control device that makes the center boom 19 horizontal. Here, the horizontal is a direction that intersects the direction of the earth's gravity at right angles, as described above.

Therefore, in the case of a sloping field where the field is sloping, the vehicle 1 is tilted, while the center boom 19 is leveled by horizontal control that swings in the left-right direction of the vehicle due to gravity. That is, the center boom 19 is not parallel to the left-right direction of the vehicle. On the other hand, in the case of a flat ground (horizontal field), the vehicle 1 does not tilt, and the center boom 19 is parallel to the left-right direction of the vehicle and becomes horizontal.

Further, particularly in the present embodiment, as shown in FIGS. 2 to 4, in the horizontal control frame 18, shaft portions 25 penetrate in the vehicle front-rear direction and are horizontal at both ends on the lateral side of the vehicle from the front link 17. It is rotatably supported by the control frame 18. An upper portion of a flat plate-shaped lock plate 26 as a center boom pressing lock member is fixed to both ends of the shaft portion 25 so as to sandwich the horizontal control frame 18 from the front-rear direction of the vehicle. Rollers 27 having an axial center in the vehicle front-rear direction and extending in the vehicle front-rear direction are arranged between the lower portions of the lock plates 26, and the shaft portions on both ends of the rollers 27 can rotate through the lock plates 26. Is supported by. The rollers 27 abut on the upper surfaces of the center boom 19 on both sides of the vehicle in the left-right direction.

A projecting portion 28 as an intermediate portion projecting to the front of the vehicle is provided in the middle between the upper portion and the lower portion of the lock plate 26 on both sides in the left-right direction of the vehicle. A pull wire 29 is connected to the protrusion 28, and the pull wire 29 is connected to a driver's seat lever 30 arranged on the front side of the driver's seat 4. (See FIG. 2). When the pull wire 29 is pulled by operating the driver's seat lever 30, the lock plate 26 rotates with the shaft portion 25 as a fulcrum, the roller 27 presses the center boom 19, and the center boom 19 is parallel to the vehicle left and right direction of the vehicle 1. In the state of, the movement is stopped and fixed. A lock device 31 for stopping the horizontal control of the center boom 19 is configured by a trapezoidal link 24 functioning as a horizontal control device, a lock plate 26 provided with a roller 27, a pull wire 29, and a driver's seat lever 30 (FIG. 2). reference).

According to the boom sprayer 100 configured in this way, when the boom sprayer travels and works on, for example, an inclined field, the driver operates the driver's seat lever 30 to pull the pull wire 29. Then, the vehicle 1 tilted with respect to the horizontal and the center boom 19 that is about to be horizontal with respect to the horizontal control frame 18 are uniformly pressed by the lock plates 26 arranged on both sides of the horizontal control frame 18 in the left-right direction of the vehicle, and the center boom 19 is pressed. 19 is fixed in a state of being parallel to the left-right direction of the vehicle. That is, the horizontal control of the center boom 19 by the pendulum is forcibly stopped by the pressure on the center boom 19 by the lock plate 26, and the center boom 19 is parallel to the left and right direction of the vehicle and fixed, and the center boom is on the farmland or It is possible to run and work on sloped fields without touching crops. Therefore, the tilt cylinder and the lock cylinder conventionally used for stopping the horizontal control of the center boom 19 and tilting and fixing the center boom 19 are not required, the number of parts can be reduced, and the weight can be reduced.

Further, when the center boom 19 is tilted and parallel to the vehicle left and right direction, the roller 27 presses the center boom 19 while rotating, so that the center boom 19 can be pressed smoothly.

Further, since the lock plate 26 presses the center boom 19 by pulling the pull wire 29 by operating the driver's seat lever 30, the horizontal control of the center boom 19 by the pendulum can be easily stopped by operating the driver's seat lever 30. Can be done.

Further, since the center boom 19 can always be parallel to the left-right direction of the vehicle, there is no possibility that the side boom 21 will surely fit in the boom receiver 12 and come off when the side boom 21 is retracted. Further, when the side boom 21 is retracted, there is no risk of the side boom 21 hitting the vehicle 1 and being damaged.

Although the present invention has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment. For example, in the above embodiment, the center boom pressing lock member is a flat plate-shaped lock plate. Although it is set to 26, it may be a rod-shaped member, a rod having a U-shaped tip and rotatably supporting the roller, or the like.

Further, in the above embodiment, the application to the self-propelled boom sprayer is described, but the application can also be applied to the towed boom sprayer.

1 ... Vehicle, 18 ... Horizontal control frame, 19 ... Center boom, 26 ... Lock plate (center boom pressing lock member), 27 ... Roller, 28 ... Protruding part (middle part), 29 ... Pull wire, 30 ... Driver's seat lever, 100 ... Boom sprayer.

Claims (3)

The vehicle (1), the horizontal control frame (18) provided on the vehicle (1) and extending in the left-right direction of the vehicle, and the horizontal control frame (18) are supported so as to be swingable in the left-right direction of the vehicle in a pendulum shape. In a boom sprayer (100) equipped with a center boom (19) that is horizontal due to gravity,
A center boom pressing lock member (26) provided on the horizontal control frame (18) and arranged on both sides in the left-right direction of the vehicle is provided.
By evenly pressing the center boom pressing lock member (26) against the center boom (19), the center boom (19) is fixed in a state where the center boom (19) is parallel to the vehicle left-right direction. A boom sprayer (100) characterized by being played. The center boom pressing lock member (26) is
The upper part thereof has an axial center in the front-rear direction of the vehicle and is rotatably supported with respect to the horizontal control frame (18).
The boom sprayer (100) according to claim 1, further comprising a roller (27) having an axial center in the front-rear direction of the vehicle and for pressing the center boom (19). An intermediate portion (28) between the upper portion and the lower portion of the center boom pressing lock member (26) is connected to the driver's seat lever (30) via a pull wire (29).
The boom sprayer according to claim 2, wherein the center boom pressing lock member (26) presses the center boom (19) by pulling the pull wire (29) by operating the driver's seat lever (30). (100).

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