JP7299771B2 - boom sprayer - Google Patents

Description

The present invention relates to boom sprayers.

Conventionally, as a boom sprayer that sprays chemical solutions, a center boom that can be raised and lowered and extends horizontally at the front of the vehicle is connected to both ends of the center boom so that it can rotate about a fulcrum. and a side boom that can move between an open position and a closed position that is rotated with respect to the center boom and folded to the side of the vehicle, and while traveling with the side boom opened, the center boom and A boom sprayer that sprays a chemical solution from a plurality of spray nozzles arranged along side booms is widely known.

A boom sprayer disclosed in Patent Document 1 below includes a boom stopper for preventing the side boom from rotating beyond the open position when moving the side boom from the closed position to the open position. This boom stopper is a bolt-shaped stopper that extends along the center boom and is fixed to the front surface of the end of the center boom. Further rotation of the side boom is prevented by abutting the end face of the side boom.

JP 2010-99564 A

As described above, in the boom sprayer of Patent Document 1, the boom stopper when opening the side booms has a bolt shape and protrudes forward from the front surface of the end portion of the center boom, thereby achieving compactness. is desired.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and it is possible to reduce the size of the side boom stopper when opening the side boom and to reduce the cost. The purpose is to provide a sprayer.

The present invention comprises a horizontally extending center boom (19), an end of which is rotatably connected to the end of the center boom (19) with a single axis (40) as a fulcrum, and a straight line with the center boom (19). a side boom (21) that moves between an open position arranged in a shape and a closed position that is rotated and folded with respect to the center boom (19); In a boom sprayer (100) capable of distributing ), the recesses (30, 32) are rotatably supported by a single shaft (40), and the inner surface (63) of the recess (30) of the center boom (19) or the recess ( 32), and when the side boom (21) is in the open position, the other end is fixed to the inner surface (63) of the recess (30) of the center boom (19) or the side boom. It is characterized by providing a stopper plate (61) that abuts against the other inner surface (64) of the recess (32) of (21) to prevent further rotation of the side boom (21).

According to such a boom player (100), one end of the stopper plate (61) as a boom stopper is attached to the inner surface (63) of the recess (30) at the end of the center boom (19) or the side boom (21). ) is fixed to either one of the inner surfaces (64) of the recess (32) at the end of the ), and when the side boom (21) is positioned in the open position in line with the center boom (19), the other end is fixed to the center boom (19) (19) or the other of the inner surface (63) of the recess (30) at the end of the side boom (21) or the inner surface (64) of the recess (32) at the end of the side boom (21) to rotate the side boom (21) further. The boom stopper is housed in the recesses (30, 32) instead of protruding forward from the front surface of the end of the center boom (19), so compactness can be achieved. At the same time, the cost can be reduced by using a simple stopper plate (61) as the boom stopper.

Here, specifically, as a configuration that favorably exhibits the above effect, the concave portions (30, 32) are U-shaped, and either the center boom (19) or the side booms (21) are arranged in a U-shape. The recessed portions (30, 32) of the letter are inserted into the recessed portions (30, 32) of the other U-shaped portion of the center boom (19) or the side boom (21) and supported by a single shaft (40), and the center boom ( 19) or one end of the stopper plate (61) is fixed to the inner surfaces (63, 64) of the web portions (31, 33) of the U-shaped recesses (30, 32) of either one of the side booms (21). , on the inner surface (63, 64) of the web portion (31, 33) of the other U-shaped recess (30, 32) of the center boom (19) or side boom (21), the other end of the stopper plate (61) are in contact with each other.

Thus, according to the present invention, it is possible to reduce the size of the stopper for the side boom when opening the side boom, and to reduce the cost.

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 side boom opening/closing device in FIG. 1; FIG. 4 is a perspective view of the ends of the center boom and the side booms when the side booms are positioned at the closed position, as seen obliquely from the upper rear; FIG. 4 is a perspective view of the ends of the center boom and the side booms when the side booms are positioned at the open position, as seen obliquely from the front and above; FIG. 3 is a schematic perspective view showing an operating portion of the side boom opening/closing device in FIGS. 1 and 2;

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 viewed obliquely from above, FIG. 2 is a schematic perspective view showing a side boom opening/closing device in FIG. 1, and FIG. 3 is a side boom closed position. Fig. 4 is a perspective view of the ends of the center boom and side booms when the side booms are in the open position, as seen from the rear and obliquely above. FIG. 5 is a perspective view seen obliquely from the front and above, and FIG. 5 is a schematic perspective view showing the operating portion of the side boom opening/closing device in FIGS. 1 and 2. FIG. 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 capable of traveling and a boom device 2 for spraying a chemical solution from the vehicle 1 .

The vehicle 1 includes a substantially rectangular body frame 50 elongated in the front-rear direction. A driver's seat 4 is provided on the front part of the vehicle body frame 50 to form a space for a worker to sit and perform driving operation by the steering wheel 3, chemical solution spraying operation, 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 lateral sides of the vehicle body frame 50 . A granule spraying device 7 is provided in front of the handle 3 . The granule spraying device 7 has a granule tank 8 containing granules in its upper part, and an air blower 51 for sending out the granules in its lower part. there is The granule spraying device 7 sprays the granules in the granule tank 8 forward from the injection port 9 .

An engine room 10 that houses an engine is provided on the rear portion of the vehicle body frame 50 . Between the driver's seat 4 and the engine room 10 on the body frame 50, a chemical liquid tank 11 is mounted to contain the chemical liquid sprayed from the boom device 2. - 特許庁A boom receiver 12 extending in the lateral direction of the vehicle is fixed to the upper portion of the chemical liquid tank 11 . A pair of front wheels 13 and a pair of rear wheels 14 are provided on the vehicle body frame 50 on both sides thereof in the vehicle left-right direction. 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. Reference numeral 52 denotes a loading platform fixed to the body frame 50. As shown in FIG.

In front of the driver's seat 4 in the body frame 50, four-bar link mechanisms 15 forming a pair in the left-right direction of the vehicle are arranged so as to extend forward. The boom device 2 is supported by a vehicle body frame 50 via a four-bar link mechanism 15 . The four-bar link mechanism 15 has a vertically extending rear link 53 fixed to the vehicle body frame 50 side, and a stay 55 that spans between lower links 54, 54 extending in the vehicle longitudinal direction. The rear end of the stator of the electric hydraulic cylinder 16 as an actuator is pivotally attached to the stay 55, and the tip of the slider is pivotally attached to the horizontal control frame 18, which will be described later. By operating the four-bar link mechanism 15, the vertically extending front side link 17 moves up and down (vertically moves), and the horizontally extending center boom 19, which will be described later, moves up and down.

The boom device 2 includes a horizontal control frame 18 extending in the lateral and horizontal directions of the vehicle and fixed to the front link 17 , and a center frame 18 arranged in parallel below the horizontal control frame 18 and longer in the lateral direction of the vehicle than the horizontal control frame 18 . A pair of left and right link rods 20 connecting the boom 19, the horizontal control frame 18 and the center boom 19, and a pair of side booms rotatably connected to both ends of the center boom 19 with a shaft portion 40 serving as a single axis as a fulcrum. 21 and. The pair of link rods 20 has an inverted V shape when viewed in the front-rear direction of the vehicle. and are rotatably connected to the rear side.

That is, a trapezoidal link, which is a type of four-bar link mechanism, is configured 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. Here, horizontal means a direction perpendicular to the direction of gravity of the earth.

A nozzle pipe 22 is attached to each of the center boom 19 and the side booms 21, and each nozzle pipe 22 is provided with a plurality of nozzles 23 for chemical spray along the longitudinal direction (see also FIG. 2). . When spraying the chemical solution, the side booms 21 are spread from the closed position shown in FIG. 1 to the open position aligned with the center boom 19 with the shaft portion 40 as a fulcrum (see FIG. 4).

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 to the closed position 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. 2 and 4, the end of the center boom 19 is provided with a recess 30 recessed toward the end opposite to the end (toward the center of the center boom 19). there is The recessed portion 30 is U-shaped, and a web portion 31 of the recessed portion 30 is fixed to the end face of the center boom 19 so as to open outward in the longitudinal direction of the vehicle and in the axial direction of the center boom 19 .

As shown in FIGS. 2 to 4, the end of the side boom 21 is also provided with a recess 32 recessed toward the end opposite to the end. The recess 32 has a U-shape, and a web portion 33 of the recess 32 is fixed to the end surface of the side boom 21 . As shown in FIGS. 2 and 4, the upper flange portion 34 of the recess 32 rests on the upper flange portion 35 of the recess 30 of the center boom 19 and the lower flange portion 36 of the recess 32 rests on the center boom. 19 under the lower flange portion 37 of the recess 30 . That is, the U-shaped concave portion 30 of the center boom 19 is inserted into the U-shaped concave portion 32 of the side boom 21 . In this state, the shaft portion 40 is attached to the upper flange portion 35 of the recess 30, the upper flange portion 34 of the recess 32, the lower flange portion 37 of the recess 30, and the lower flange portion 36 of the recess 32. The concave portion 30 and the concave portion 32 are rotatably supported by the shaft portion 40 .

As shown in FIGS. 2 and 3, at the upper flange portion 34 of the recess 32 of the side boom 21, the web portion 31 of the recess 30 of the front side and the center boom 19 in the state where the side boom 21 is located in the closed position. A bolt 41 protrudes upward at the near position, and one end of the compression coil spring 38 is locked to this bolt 41 . The other end of the compression coil spring 38 is engaged with an angle 39 positioned a predetermined distance from the recess 30 of the center boom 19 toward the center of the center boom 19 . The compression coil spring 38 functions to assist opening and closing of the side boom 21 when the side boom 21 is opened and closed by opening and closing levers 43 and 44 (details will be described later).

In addition, in the flange portion 34 above the concave portion 32 of the side boom 21, a pin is provided on the rear side when the side boom 21 is in the closed position and near the web portion 31 of the concave portion 30 of the center boom 19. 42 projects downward, and the tip of a pull wire 49 is pivotally attached to the pin 42 . A pull wire 49 passes through the angle 39 and is connected to an operation portion 48 (see FIG. 1) arranged on the front side of the driver's seat 4 . The operation unit 48 is for lever operation, and generally includes open/close levers 43 and 44, a horizontal control lock lever 56, and a cover 45, as shown in FIGS.

A pull wire 49 on the left side of the vehicle is connected to the opening/closing lever 43 on the left side of the vehicle, and a pull wire 49 on the right side of the vehicle is connected to the opening/closing lever 44 on the right side. When the opening/closing levers 43 and 44 are pulled, the side boom 21 is moved to the closed position by the pull wire 49, and when the opening/closing levers 43 and 44 are released, the side boom 21 is moved to the open position. The connecting portions of the opening/closing levers 43 and 44 to the pull wire 49 are covered with a cover 45. A slit (long hole) 47 provided in the cover 45 through which the opening/closing levers 43 and 44 move is provided with the opening/closing levers 43 and 44. A notch 46 is provided for locking 44 . By hooking the opening/closing levers 43 and 44 to the notch 46, the opening/closing levers 43 and 44 can be locked at that position. A short horizontal control lock lever 56 adjacent to the right opening/closing lever 44 is an operation lever for locking the aforementioned horizontal control of the center boom 19 (forcibly stopping the horizontal control). A side boom opening/closing device for opening/closing the side boom 21 is composed of the opening/closing levers 43 and 44, the cover 45 including the notch 46, the pull wire 49, and the compression coil spring 38. As shown in FIG.

Further, as shown in FIG. 3, the end of the center boom 19 is provided with a stopper bolt 60 that acts as a stopper when the side boom 21 is closed. A stopper plate 61 is provided as a stopper when opening.

As shown in FIG. 3 , the stopper bolt 60 is fixed to the rear end of the center boom 19 via a plate 62 protruding rearward and arranged along the center boom 19 . When the side boom 21 is positioned at the closed position, the head of the stopper bolt 60 abuts the side end surface of the web portion 33 of the recess 32 of the side boom 21 to prevent further rotation.

As shown in FIG. 4 , the stopper plate 61 is configured as a substantially rectangular flat plate, and one end face of the stopper plate 61 is fixed to the inner surface 63 of the web portion 31 of the recess 30 of the center boom 19 . The stopper plate 61 is arranged substantially parallel to the upper and lower flange portions 35 and 37 of the U-shaped concave portion 30 of the center boom 19 and extends in the axial direction of the center boom 19 . ing. When the side boom 21 is positioned at the open position, the end surface of the stopper plate 61 on the other end side contacts the inner surface 64 of the web portion 33 of the concave portion 32 of the side boom 21 to prevent further rotation.

According to the boom sprayer 100 configured in this manner, when the boom sprayer 100 travels and works, for example, in a field or the like, the operator first operates the open/close levers 43 and 44 as described with reference to FIG. unlock the That is, the opening/closing levers 43 and 44 caught in the notch 46 on the upper stage are moved to the slit 47 and released. Then, referring to FIG. 2, the biasing force of the compression coil spring 38 causes the side boom 21 to start opening, and then the side boom 21 opens due to its own weight. When the side boom 21 is opened by its own weight, the opening force is suppressed by the biasing force of the compression coil spring 38, and the side boom 21 opens slowly. At the same time, the opening/closing levers 43 and 44 move downward in the slit 47 .

Then, when the side boom 21 is positioned at the open position, as shown in FIG. further rotation of is blocked.

On the other hand, when the side boom 21 is retracted to the closed position shown in FIG. 1, the driver pulls the open/close levers 43 and 44 forward, as described with reference to FIG. Then, the pull wire 49 is pulled and the side boom 21 is closed. At this time, the biasing force of the compression coil spring 38 acts to pull the side boom 21, so that the driver's pulling force on the opening/closing levers 43 and 44 is reduced.

Then, the driver pulls the opening/closing levers 43 and 44 all the way, hooks the opening/closing levers 43 and 44 to the notch 46 on the upper stage, and locks the opening/closing levers 43 and 44 . In this state, the head of the stopper bolt 60 comes into contact with the side end surface of the web portion 33 of the concave portion 32 of the side boom 21 (see FIG. 3), and further rotation of the side boom 21 is prevented. is in the closed position.

According to the boom player 100 of this embodiment having such a configuration, one end of the stopper plate 61 as a boom stopper is fixed to the inner surface 63 of the recess 30 at the end of the center boom 19, and the side boom 21 is When positioned at the open position aligned linearly with the center boom 19, the other end of the stopper plate 61 abuts against the inner surface 64 of the recess 32 at the end of the side boom 21 to prevent further rotation of the side boom 21. The boom stopper does not project forward from the front surface of the end of the center boom 19, but is accommodated in the recesses 30 and 32. Therefore, the boom stopper is simply a stopper plate 61. As a result, low cost can be achieved.

The present invention has been specifically described above based on the embodiment, but the present invention is not limited to the above embodiment. Although it is fixed to the inner surface 63 of the portion 31, the stopper plate 61 is an L-shaped flat plate, and one end of the L-shaped flat plate is fixed to the inner surface of the upper flange portion 35 or the lower flange portion 37 of the recess 30. Alternatively, the other end of the L-shaped flat plate may abut against the inner surface 64 of the web portion 33 of the recess 32 of the side boom 21 when the side boom 21 is positioned at the open position.

Also, instead of fixing one end of the stopper plate to the inner surface of the recess 30 of the center boom 19, the other end of the stopper plate is fixed to the inner surface of the recess 32 of the side boom 21, and the side boom 21 is positioned at the open position. Sometimes one end of the stop plate may abut the inner surface 63 of the web portion 31 of the recess 30 of the center boom 19 .

In the above embodiment, it is particularly preferable to insert the recessed portion 30 of the center boom 19 into the recessed portion 32 of the side boom 21 . You can change it.

Moreover, in the above embodiment, the side booms 21 are connected to both ends of the center boom 19, but the boom sprayer connected to only one end of the center boom 19 is also applicable.

Further, in the above embodiment, application to the self-propelled boom sprayer 100 is described, but it can also be applied to a tow-type boom sprayer and further to a mounted boom sprayer.

DESCRIPTION OF SYMBOLS 19... Center boom, 21... Side boom, 30, 32... Recessed part, 31, 33... Web part, 40... Shaft part (single axis), 61... Stopper plate, 63, 64... Inner surface, 100... Boom sprayer.

Claims (2)

a horizontally extending center boom (19);
An open position and the center boom (19) having an end portion rotatably connected to the end portion of the center boom (19) with one axis (40) as a fulcrum, and aligned linearly with the center boom (19). a side boom (21) for movement between a closed position pivoted and folded relative to
The center boom (19) and the side boom (21) are configured to be able to spray a chemical solution,
The end of the center boom (19) and the end of the side boom (21) are each provided with a recess (30, 32) recessed toward the end opposite to the respective end, the recess (30, 32) are rotatably supported by the one shaft (40),
One end is fixed to either the inner surface (63) of the recess (30) of the center boom (19) or the inner surface (64) of the recess (32) of the side boom (21). ) is located in the open position, the other end is on the other of the inner surface (63) of the recess (30) of the center boom (19) or the inner surface (64) of the recess (32) of the side boom (21). A boom sprayer (100) comprising a stopper plate (61) that abuts and prevents further rotation of the side boom (21). The recesses (30, 32) are U-shaped,
The U-shaped concave portion (30, 32) of either the center boom (19) or the side boom (21) is aligned with the U-shaped recess (30, 32) of the other of the center boom (19) or the side boom (21). inserted into the recesses (30, 32) and supported by the one shaft (40);
The stopper plate (61 ) is fixed, and
The inner surfaces (63, 64) of the web portions (31, 33) of the U-shaped recesses (30, 32) of the center boom (19) or the side boom (21) are provided with the stopper plate (61). The boom player (100) of claim 1, wherein said other end abuts.

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