JP7239395B2 - boom sprayer - Google Patents

Description

The present invention relates to boom sprayers.

2. Description of the Related Art Conventionally, as a boom sprayer that sprays a chemical solution, the one described in Patent Document 1 below is known. The boom sprayer described in Patent Document 1 has a four-bar link device in the front part of the vehicle, and a front frame is connected to a front link of the four-bar link device. Vertical members extending in the vertical direction are fixed to both sides of the front frame in the vehicle left-right direction, respectively, and one end of a link rod is rotatably connected to the upper portion of the vertical member on one side in the vehicle left-right direction. A stator of the tilt cylinder is rotatably connected to the upper portion of the vertical member on the other side in the vehicle left-right direction. 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 central portion 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 vehicle left-right direction, and the link rod and the tilting cylinder form an inverted V shape when viewed in the vehicle front-rear direction. That is, a four-side (four-joint) link structure is formed by the upper part of the front frame that constitutes the upper side, the link rod and the tilting cylinder that constitute the oblique side, and the center boom that constitutes the lower side, and the center boom is attached to the front frame. It is supported so as to be able to swing in the left-right direction of the vehicle in a pendulum shape, and the horizontal control by the four-side link structure allows the center boom to become horizontal due to gravity. In this horizontal position, the mover of the tilt cylinder is in the retracted position. The horizontal means a direction perpendicular to the direction of gravity of the earth.

In such a boom sprayer, when traveling and working on flat ground (horizontal field), the vehicle is horizontal without tilting, and the center boom is horizontal and parallel to the left and right direction of the vehicle. On the other hand, in the case of a sloping field, the vehicle is tilted, while the center boom swings in the left-right direction of the vehicle and becomes horizontal due to horizontal control by gravity. In this case, the slider of the tilting cylinder is extended, and the center boom becomes parallel to the left-right direction of the tilted vehicle. In this state, the sliders of the lock cylinders, which are arranged on both sides in the left-right direction of the vehicle and to which the stator is fixed to the center boom, respectively extend and contact the left and right vertical members of the front frame, respectively, thereby rocking the center boom. Immobilized and locked. That is, in the case of an inclined field, the extension of the slider of the inclined cylinder causes the center boom to become 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 stops. This prevents the center boom from coming into contact with farmland and crops.

Japanese Unexamined Patent Application Publication No. 2017-143768

Thus, in the boom sprayer of Cited Document 1, the tilt cylinder and the lock cylinder are necessary to stop horizontal control of the center boom and fix the center boom in a state parallel to the left-right direction of the vehicle. There is a demand for a reduction in energy consumption and weight reduction.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and eliminates the need for the tilt cylinder and lock cylinder that have been used conventionally to stop the horizontal control of the center boom and to tilt and fix the center boom. To provide a boom sprayer capable of reducing the number of parts and reducing the weight.

The present invention comprises a vehicle (1), a horizontal control frame (18) provided on the vehicle (1) and extending in the lateral direction of the vehicle, and a horizontal control frame (18) capable of pendulum swinging in the lateral direction of the vehicle. A center boom (19) that is supported and becomes horizontal by gravity, and a center boom pressing lock member ( 26), and the center boom (19) is moved in a state in which 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 of the center booms (19). It is characterized by being fixed.

According to such a boom sprayer (100), when the boom sprayer (100) travels and works on, for example, a sloping farm field, the vehicle (1) tilts with respect to the horizontal and the horizontal control frame (18) is positioned horizontally. The center boom (19) about to become parallel to the left and right direction of the vehicle due to the uniform pressing of the center boom pressing lock members (26) provided on the horizontal control frame (18) and arranged on both sides in the left and right direction of the vehicle. is fixed with . Therefore, the tilt cylinder and the lock cylinder, which have been conventionally used to stop the horizontal control of the center boom (19) and tilt and fix the center boom (19), are no longer necessary, and the number of parts can be reduced and the weight can be reduced. can.

Here, the center boom pressing lock member (26) has an upper portion which has an axis in the longitudinal direction of the vehicle and is rotatably supported with respect to the horizontal control frame (18). If the roller (27) has a center and presses the center boom (19), when the center boom (19) inclines and becomes parallel to the left and right direction of the vehicle, the roller (27) rotates to center the center boom (19). Since the boom (19) is pushed, the center boom (19) can be smoothly pushed.

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). When 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, the horizontal control of the center boom (19) by the pendulum is stopped. It can be easily carried out by the operation of (30).

Thus, according to the present invention, it is possible to eliminate the need for the tilt cylinder and the lock cylinder that have been conventionally used to stop the horizontal control of the center boom and tilt and fix the center boom, thereby reducing the number of parts and reducing the weight. can be

It is the perspective view which looked at the boom sprayer which concerns on embodiment of this invention from front diagonally upper direction. FIG. 2 is a schematic perspective view showing a horizontal control device and a locking device in FIG. 1; FIG. 3 is an enlarged view of a horizontal control device, a center boom pressing lock member including a roller that constitutes a lock device, and a pull wire in FIG. 2 ; 4 is an enlarged view of a center boom pressing lock member including rollers and a pull wire in FIG. 3; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a boom sprayer according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a boom sprayer according to an embodiment of the present invention seen obliquely from the front, 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. 4 is an enlarged view showing a center boom pressing lock member including rollers and a pull wire constituting a lock device, and FIG. 4 is an enlarged view showing a center boom pressing lock member including a roller and a pull wire. The boom sprayer of this embodiment sprays a chemical solution, for example, on crops while traveling in a field, for example. In the following description, "front", "rear", "left", and "right" are directions with respect 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 .

In the front part of the vehicle 1, there is provided a driver's seat 4 which forms a space for a worker to sit on and which is used to perform driving operation and chemical solution spraying operation using a steering wheel 3, lever operation described later, and the like. A driver's seat 4 is covered with a roof 5 from above. The roof 5 is supported by roof pillars 6 erected from the sides of the driver's seat 4 on both sides in the left-right direction of the vehicle 1 . A granule spraying device 7 is provided in front of the handle 3 . The granule spraying device 7 includes a granule tank 8 containing granules as a drug, and sprays the granules in the granule tank 8 forward from a spray port 9 .

An engine room 10 that houses an engine is provided in the rear portion of the vehicle 1 . Between the driver's seat 4 and the engine room 10, a chemical liquid tank 11 for containing the chemical liquid sprayed from the boom device 2 is mounted. A boom receiver 12 extending in the lateral direction of the vehicle is fixed to the upper portion of the chemical liquid tank 11 . The vehicle 1 has a pair of front wheels 13 and a pair of rear wheels 14 . The front wheels 13 and rear wheels 14 are driven by the engine to rotate. In this embodiment, the front wheels 13 and the rear wheels 14 rotate because of the four-wheel drive, but the front wheels and rear wheels may be driven.

In front of the driver's seat 4 of the vehicle 1, a pair of four-joint 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-bar link mechanism 15 . When the four-bar link mechanism 15 is operated by an electric hydraulic cylinder (actuator) 16, a front link 17 extending in the vertical direction moves up and down.

As shown in FIGS. 1 to 3, the boom device 2 includes a horizontal control frame 18 extending in the lateral direction of the vehicle and fixed to the front link 17; It has 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 Figure 1).

As shown in FIG. 1, nozzle pipes 22 are attached to the center boom 19 and the side booms 21, respectively. there is The side booms 21 are extended so as to form a straight line with respect to the center boom 19 from the state shown in FIG. 1 when spraying the chemical solution. Then, while traveling by driving the engine, the chemical solution pump is driven, and the chemical solution in the chemical solution tank 11 is sprayed from the nozzles 23 through the nozzle pipes 22 of the center boom 19 and the side booms 21 . The side boom 21 is folded, as shown in FIG. 1, when not spraying the chemical solution, and is stored in a state in which the side boom 21 is diagonally rearward raised at a lateral position of the vehicle 1. As shown in FIG. The side booms 21 are 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 has a rectangular cylindrical shape. As shown in FIGS. 2 and 3, the pair of link rods 20 are arranged near the center in the left-right direction of the vehicle and inward in the left-right direction of the vehicle from the front link 17 fixed to the horizontal control frame 18. It shows the letter C. The link rod 20 has its upper end rotatably connected to the front and rear sides of the horizontal control frame 18 and its lower end rotatably connected to the center boom 19 front and rear.

In other words, a trapezoidal link 24, which is a type of four-bar link mechanism, is constructed 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 oblique sides. The center boom 19 supported by the horizontal control frame 18 via the link rod 20 in this manner can swing in the lateral direction of the vehicle like a pendulum, and becomes horizontal by horizontal control by gravity. That is, the trapezoidal link 24 constitutes a horizontal control device for making the center boom 19 horizontal. Here, the horizontal means a direction perpendicular to the direction of gravity of the earth, as described above.

Therefore, in the case of a sloping farm field, the vehicle 1 is slanted, while the center boom 19 is leveled by horizontal control to swing 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 flat land (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 this embodiment, as shown in FIGS. 2 to 4, the horizontal control frame 18 has shaft portions 25 extending in the vehicle front-rear direction through both ends of the horizontal control frame 18 on the outside in the vehicle left-right direction of the front link 17 and extending horizontally. It is rotatably supported by the control frame 18 . Upper portions of flat plate-shaped lock plates 26 as center boom pressing lock members are fixed to both ends of the shaft portion 25 so as to sandwich the horizontal control frame 18 from the vehicle front-rear direction. Between the lower portions of the lock plate 26, a roller 27 having an axis in the vehicle front-rear direction and extending in the vehicle front-rear direction is arranged. supported by The rollers 27 contact upper surfaces of the center boom 19 on both sides in the left-right direction of the vehicle.

Protruding portions 28 are provided as intermediate portions protruding forward of the vehicle between upper and lower portions of front lock plates 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 Figure 2). When the pull wire 29 is pulled by operating the driver's seat lever 30, the lock plate 26 rotates about the shaft portion 25, the roller 27 presses the center boom 19, and the center boom 19 is parallel to the left-right direction of the vehicle 1. In this state, the movement is stopped and fixed. A trapezoidal link 24 functioning as a horizontal control device, a lock plate 26 having rollers 27, a pull wire 29, and a driver's seat lever 30 constitute a lock device 31 for stopping the horizontal control of the center boom 19 (Fig. 2). reference).

According to the boom sprayer 100 configured in this way, when the boom sprayer travels and works on, for example, a sloped field, the driver operates the driver's seat lever 30 and pulls the pull wire 29 . Then, the vehicle 1 tilting with respect to the horizontal and the center boom 19 trying to become horizontal with respect to the horizontal control frame 18 are evenly pressed by the lock plates 26 arranged on both sides of the horizontal control frame 18 in the left and right direction of the vehicle, and the center boom is lifted. 19 is fixed in parallel with the left-right direction of the vehicle. That is, when the center boom 19 is pressed by the lock plate 26, the horizontal control of the center boom 19 by the pendulum is forcibly stopped, and the center boom 19 is fixed parallel to the left-right direction of the vehicle, and the center boom is moved to farmland or the like. It can run and work on sloping fields without coming into contact with crops. Therefore, the tilting cylinder and the lock cylinder, which are conventionally used to stop the horizontal control of the center boom 19 and tilt and fix the center boom 19, are not necessary, and the number of parts can be reduced and the weight can be reduced.

Further, when the center boom 19 is tilted and becomes parallel to the left-right direction of the vehicle, the center boom 19 can be smoothly pressed because the rollers 27 press the center boom 19 while rotating.

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.

In addition, since the center boom 19 can always be parallel to the left-right direction of the vehicle, the side booms 21 are securely accommodated in the boom receivers 12 when the side booms 21 are retracted, and there is no possibility that they will come off. Also, when the side boom 21 is retracted, there is no possibility that the side boom 21 will hit the vehicle 1 and be damaged.

Although the present invention has been specifically described based on the embodiments, the present invention is not limited to the above embodiments. For example, in the above embodiments, the center boom pressing lock member is replaced by a flat lock plate. Although 26 is used, it may be a rod-shaped member or a rod having a U-shaped tip that rotatably supports the roller.

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

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

Claims (3)

A vehicle (1), a horizontal control frame (18) provided in the vehicle (1) and extending in the vehicle left-right direction, and supported by the horizontal control frame (18) so as to be swingable in the vehicle left-right direction in a pendulum shape. , a center boom (19) horizontal by gravity, and
center boom pressing lock members (26) provided on the horizontal control frame (18) and arranged on both sides in the left and right direction of the vehicle,
The center boom ( A boom sprayer (100) characterized in that the center boom (19) is fixed in a state in which the center boom (19) is parallel to the lateral direction of the vehicle. The center boom pressing lock member (26) is
The upper part thereof has an axis in the longitudinal direction of the vehicle and is rotatably supported with respect to the horizontal control frame (18),
2. The boom sprayer (100) according to claim 1, further comprising a roller (27) having an axis in the longitudinal direction of the vehicle and 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 the pull wire (29),
3. The boom sprayer according to claim 2, wherein the center boom pressing lock member (26) presses the center boom (19) when the pull wire (29) is pulled by operating the driver's seat lever (30). (100).

Images