JP3361240B2 - Boom sprayer equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a horizontal spray nozzle by a boom (jib) held by a self-propelled vehicle,
The present invention relates to a boom sprayer that sprays a chemical liquid over a wide range, and particularly to a boom sprayer device that can freely adjust the height of a spray nozzle.

[0002]

[Prior art]

A boom for spraying a liquid medicine in a liquid medicine tank by a power sprayer mounted on a tractor, which supports a spraying rod provided with a large number of spraying nozzles on a self-propelled vehicle such as a tractor by horizontally extending it horizontally by a boom. Sprayers are used. In a narrow area of arable land, in order to effectively use the control road on which the traveling vehicle runs, the spray rod is extended to the left and right sides, the left side is sprayed on the outward path, the spray rod is reversed on the return path and the right side on the opposite side is sprayed, A so-called single boom type boom sprayer device is also used.

In such a boom sprayer device, it is necessary to adjust the height of the nozzle according to the growth of the crop or according to the kind of the crop. Furthermore, the boom sprayer device of the one-boom type needs to reverse the boom every time it reaches the ridge end, and the frequently repeated operations of adjusting the height of these nozzles and reversing the boom are required each time. However, it is troublesome to leave the driver's seat of the self-propelled vehicle, and the work efficiency is reduced. Therefore, a simple and inexpensive boom sprayer device capable of automatically performing these operations in the driver's seat is desired.

[0005]

A first object of the present invention is to disclose a boom sprayer device capable of easily operating the height of a spray nozzle up and down in a driver's seat.

A second object of the present invention is to significantly change the height of the spray nozzle by changing the mounting position by attaching and detaching the boom according to the type of crop, and at the same time, the difference in the growth level of the crop. Accordingly, it is another object of the present invention to disclose a boom sprayer device that can be adjusted up and down in the driver's seat even during spraying of a chemical solution.

A third object of the present invention is to disclose an inexpensive one-boom type boom sprayer device capable of automatically performing a left-right reversing operation of a boom holding a spray rod in the driver's seat.

[0008]

The first gist of the present invention is to equip a self-propelled vehicle with a chemical liquid tank and a chemical liquid pressure-feeding means, and a vertical axis supported by the self-propelled vehicle is provided at predetermined vertical intervals. And a pair of swing arms is pivotally mounted at one end thereof so as to be swingable in the vertical direction, and the other end of each of the swing arms is pivotally mounted to the boom support body, whereby the vertical shaft serves as a fixed node. Four
A joint link is formed, and the telescopic drive means is rotatably supported at both ends thereof between the vertical shaft and any one of the swing arms or the boom support, and the boom support is provided with A boom sprayer device is characterized in that holding means for detachably supporting a boom having a spray rod is formed.

In the above, as the chemical liquid pressure-feeding means, for example, a chemical liquid conduit such as a pump driven by the engine output of the self-propelled vehicle and a hose connected to the discharge port of the pump is typical. The telescopic drive means is pivotally attached to the vertical shaft at one end, pivotally attached to the swing arm at the other end, and actuated so as to extend or reduce the distance between the pivot attachment portions. Then, it is typically screwed into an air cylinder, a hydraulic cylinder, or a motor-driven worm or a rotating female screw cylinder as shown in the embodiment described later, and is reciprocally driven in accordance with the forward and reverse rotations of the motor. For example, a motor cylinder composed of a screw shaft.

The boom that holds the spray rod has a vertical member (support) and a member (beam) that extends in the horizontal direction. The vertical member supports a truss-shaped beam member that extends horizontally, or a vertical member. An example is a suspension-supporting string such as a wire provided between the tip of a rod-shaped beam whose base end is supported by a member and the top of a vertical member. In some cases, instead of the rod-shaped beam member, a chemical liquid conduit made of a rigid tube also serves as the beam member. As a detachable holding means for the boom and the boom support, a screw rod provided on either one of the vertical member of the boom and the boom support is inserted into a through hole provided on the other, and the screw rod is inserted through the through hole of the screw rod. A commonly used locking structure can be adopted, such as a method of screwing a tightening screw to the protrusion to tighten and fix it, and a combination of a protrusion or a groove described in an embodiment described later and a hook fitted therein.

The boom sprayer device according to the first aspect is
In the driver's seat of the extension / contraction drive means, the boom support body forming a four-bar link with the vertical shaft, which is a fixed joint, is expanded / contracted with respect to the vertical shaft by expanding / contracting the expansion / contraction drive means by rotating the direction switching valve and the motor switch. By setting the length of the vertical swing arm and the length between the boom support and the vertical swing arm, it is possible to move up and down while changing from a vertical posture to an inclined posture or vice versa. it can.

The change in inclination of the boom support to the left and right due to the expansion and contraction of the expansion and contraction drive means becomes smaller as the four-bar link approaches the parallel link. Therefore, by adjusting the length of the expansion / contraction drive means, it is possible to properly maintain the distance between the chemical liquid spraying target and the spray nozzle, and it is possible to uniformly spray the chemical liquid. In particular, when the field is a sloping ground, by tilting the boom support with respect to the vertical axis, there is an effect that the distance between the spray target and the nozzle can be adjusted to be the same.

As a special case of the four-joint link, a pair of upper and lower swing arms are made equal in length, and the distance between the pivot parts at both ends of the pair of swing arms is made equal to form a parallel link. There are cases. In this case, the boom support body is vertically moved (always in parallel with the vertical axis) by the expansion / contraction operation of the expansion / contraction drive means. Therefore, when the field is flat, it is advantageous to use parallel links because it is easy to adjust the nozzle position due to the difference in height of the crops.

In a four-bar link having a vertical shaft as a fixed bar, one of the upper and lower rocking arms or both rocking arms may be composed of a member whose length can be freely adjusted. For example, even when making parallel links,
By changing the length of one swing arm, the boom support can be tilted to the left and right with respect to the vertical axis, and the attitude of the boom with respect to the tilted ground can be controlled. As the member whose length can be adjusted, a double tube structure expandable member that can be fixed to any length by a fixing means, a square rod in which through holes are arranged at a predetermined pitch interval, and a playable member on the square rod. A combination of a perforated sheath body to be fitted and a fixing pin that simultaneously penetrates the hole and the through hole of the sheath body, or the expansion / contraction drive means can be mentioned. In particular, when the telescopic drive means is used as the swing arm, the tilt of the boom can be freely adjusted in the driver's seat.

According to a second aspect of the present invention, in the boom sprayer device defined by the first aspect, the boom supporting member pivotally supports the other ends of the pair of swing arms at a predetermined interval. And a boom support rod provided in parallel with the connecting rod and supported rotatably and fixedly with respect to the connecting rod. In the boom sprayer device, the holding means for detachably supporting the engaging portions formed at a plurality of positions are formed at a plurality of positions at the same pitch interval.

As in the first aspect, the boom sprayer device according to the second aspect has height adjusting means for moving the boom support up and down in the driver's seat, and one of the vertical members constituting the boom. The engaging portion provided on the supporting column and the holding means provided on the boom support rod side are provided at a plurality of positions at the same pitch, thereby changing the connecting point between the holding means and the engaging portion. Can significantly change the height of the boom. Therefore, the rough height is determined according to the object to be sprayed, and the nozzle height can be adjusted more finely by the mechanism defined in the first summary. Since the boom support rod can rotate with respect to the connecting rod, the boom that interferes when the boom sprayer device simply travels can be easily accommodated along the side surface of the self-propelled vehicle and traveled.

According to a third aspect of the present invention, in the boom sprayer device defined by the above second aspect, the boom support rod and the columns constituting the boom are both prisms, and a holding means provided on the boom support rod. One of the locking portions provided on the column is composed of protrusions projecting on the right and left sides of the prism at a constant pitch interval on the prism, and the other is provided on the prism at the same pitch interval. The boom sprayer device is characterized in that it is composed of a locking piece that can be locked to the projection while sandwiching the prism from the left and right sides.

This shows an embodiment of the boom sprayer device in the second aspect, in which both the column and the boom support rod are prisms so that when they are fixed, their surfaces come into contact with each other. By selecting the locking portion and the holding means, there is no rattling between the boom support rod and the support after fixing, the mutual contact surfaces strengthen the fixed state, and with a simple structure, Firmly holds long booms.

A fifth aspect of the present invention is the boom sprayer device defined by the above-mentioned first, second or third aspect, wherein the vertical axis is braked via a power transmission means having a torque limiter. A one-boom type boom sprayer device is characterized in that it is configured to be rotated right and left by a motor with means.

In a boom sprayer device of a so-called one-boom type, in which the boom is provided so as to project to one side of the self-propelled vehicle, and the boom is inverted 180 degrees on the return path and the other side is sprayed, Although it may be inverted manually, it is desirable to perform the inversion operation by an appropriate vertical axis drive means. As the drive means, a well-known drive method such as a method in which a crankshaft is attached to a vertical shaft and is driven by a reciprocating linear motion means, or a method in which a gear or a pulley is attached and connected to a rotary drive means can be adopted. .

As an example thereof, it is possible to exemplify a case in which the vertical shaft is rotated left and right by a motor with a brake via a power transmission means having a torque limiter. As a motor with a brake, a brake motor that uses a frictional force to operate when the energization of the motor circuit is stopped, or a motor that short-circuits the motor coil when the energization of the motor circuit is stopped to actuate a magnetic brake by back electromotive force Is. In the case of a manual reversing mechanism, a fixing means for pressing the boom swing or displacement is required, but in the case of a motor with a brake, it is not necessary and the state can be fixed by stopping at any position. it can.
In the drive means according to the fifth aspect, the motor with the brake means prevents displacement of the boom during spraying, and the torque limiter buffers the shock when an unreasonably large force is applied to the boom, and the torque limiter Prevent damage.

[0022]

1 is a front view of a boom sprayer device according to the present invention, in which a chemical tank 2 is provided on a self-propelled vehicle 1 composed of a crawler belt vehicle traveling by an internal combustion engine.
And a spray rod 50 horizontally supported by the boom 30. The boom 30 is connected by a vertical column 31, a horizontal beam 32, and a suspension support wire 33 so as to form a triangle.
Are horizontally supported in a state in which they can be folded back to the beam 32 side. The spray rod 50 is held along such a beam with the nozzles 10a, ...

On the front surface of the self-propelled vehicle 1, there is formed a rectangular frame 1b extending upward from the front end of the frame 1a of the self-propelled vehicle 1, and in the vicinity of the central portion of the rectangular frame 1b, The vertical shaft 3 is rotatably supported by the bearings 1c and 1d. A driven sprocket 3a is attached to the upper end of the vertical shaft 3 so as to rotate integrally with the vertical shaft 3, and the sprocket 3a has a rectangular frame 1a.
The output shaft of the brake motor M fixed to b is rotated by a drive sprocket 4 attached via a torque limiter (not shown) via an endless chain 4a that is wound.

An upper oscillating arm 6 and a lower oscillating arm 7 are provided at the upper and lower portions of the vertical shaft 3, respectively, at one ends 6a and 7 respectively.
At a, it is swingably supported in the vertical direction. At the other ends 6b and 7b of the upper and lower swing arms 6 and 7, a connecting rod 8 having a length equal to the distance between the one ends 6a and 7a of the swing arms is provided at its upper end 8a and lower end 8b. Parallel links having the vertical shaft 3 as a fixed joint are formed by pivoting the respective shafts. The connecting rod 8 and a boom supporting rod 9 described later form a boom supporting body.

Between the lower end of the vertical shaft 3 and the upper swing arm 6, a motor cylinder 5 serving as a telescopic drive means.
Is installed. The motor cylinder 5 includes a drive motor 5a, a screw rod 5b screwed to a female screw member (not shown) that is normally and reversely driven by the motor 5a through a reduction gear train, and a pivot at the lower end near the lower end of the vertical shaft. Wearing screw rod 5
It is composed of a cylinder 5c that guides b, and expands and contracts by rotating the motor 5a forward and backward to drive the upper swing arm 6 to which the screw rod 5b is pivoted vertically. As a result, the connecting rod 8 forming the parallel link moves vertically while maintaining the vertical posture.

The connecting rod 8 has a prismatic shape, and shaft attachment pieces 8 are provided at two upper and lower positions on the side surface of the rod 8 opposite to the vertical shaft 3.
c and 8d are projected. A columnar boom support rod 9 is provided in parallel with the connecting rod 8, and shaft attachment pieces 9c and 9d provided corresponding to the shaft attachment pieces 8c and d are provided on the side surface of the boom support rod 9. , Is pivotally supported by being in contact with the shaft mounting pieces 8c and 8d so as to be rotatably supported by the connecting rod 8 at a slight interval. A fixed arm 8e parallel to the side surface of the connecting rod 8 which is perpendicular to the side surface having the shaft attachment pieces 8c and d extends from the side surface opposite to the vertical shaft 3 at its tip. A semicircular ring 8f is fixedly provided in the vicinity.

On the other hand, at a position of the boom support rod 9 corresponding to the fixed arm 8e, a hook 10a which can be hooked on the ring 8f and a base end of the hook 10a are pivotally supported (10).
There is provided a fixing means 10 having a lever piece 10b for d) and a bearing piece 10c that is fixed to the boom support rod and rotatably supports (10e) the lever piece 10b. In this fixing means 10, with one side surface of the boom support rod abutting on the fixed arm 8e, the hook 10a is hooked on the ring 8f, the lever piece 10b is rotated, and the fulcrum 10d of the hook is fulcrum 10e of the lever piece. By reversing with respect to, the fixed arm 8e can be fixed to the side surface of the boom support rod.

On the side surface of the boom support rod 9 on which the shaft mounting pieces 9c and 9d are provided, a screw ring 9a is horizontally provided.
However, a plurality of locations (3 in the embodiment
Fixed). In this screw ring 9a, ...
The screw rod 11 is screwed, and the head 11 of the screw rod 11 is screwed.
The a and the tip 11b together form a boom holding means by being provided so as to project on both sides of the boom support rod 9 in the width direction thereof. The boom support body is configured by combining the boom support rod and the connecting rod.

On the other hand, the supporting column 31 of the boom 30 is provided with locking pieces 34, 34, ... According to the pitch intervals of the screw rings 9a, 9a ,. The locking piece 34 is
It is fixedly provided on both sides of the pillar 31 made of a prism and sandwiching the pillar 31. The other side of the locking piece has locking pieces according to the diameter of the screw rod. A cutout portion 34a is formed by cutting out from the lower side to the middle.
The notch 34a abuts one surface of the pillar 31 made of a prism on the surface of the boom support rod 9 also made of a prism, and the locking piece 34 is fitted so as to sandwich the side surface of the boom support rod 9 from both sides. At this time, it is provided at a position where it can be fitted to both ends of the screw ring 9a.

In the above embodiment, the case where the boom is held by the combination of the locking piece and the screw rod is shown.
The horizontal shaft protruding from the column is fitted into the through hole provided on the boom support rod, and the retaining means is detachably provided at the end of the horizontal shaft, or the boom support rod is composed of a hollow square pipe. Well-known means such as a method of forming a substantially T-shaped cutout in this and a T-shaped projection on the side surface of the support and fixing the projection by dropping it into the cutout can be employed.

Further, in the above-exemplified embodiment, instead of the lower swing arm 7, a length-adjustable member is used, so that the total length when it is most reduced is shorter than the length of the lower swing arm 7. Using a motor cylinder that can
If both ends thereof are pivotally attached in a vertically rotatable manner, the support column 31 can be tilted to the left or right as needed in FIG. 4 by the expansion and contraction operation of the motor cylinder, and the tip end side of the spray rod 50 can be tilted. It can be moved up and down according to the inclination of the field. Of course, even if the upper swing arm 6 is replaced with a motor cylinder, the operation is reversed, but the same effect can be obtained.

[0032]

In the boom sprayer device having such a configuration, in FIG. 3, the screw rods 11, 11 to which the boom locking pieces 34, 34 are to be locked are selected according to the length of the crop, and By rotating the head 11a, the locking piece on one side is tightened and fixed between the screw ring 9a and the head 11a, and further, the chemical liquid pressure-feeding hose and the spray rod supported by the boom (not shown) are connected. To do. When traveling to the spraying area with the boom attached, the fixing means 10 is released, and the boom support rod 9 is rotated with respect to the connecting rod 8 to move the beam 32a of the boom 30 to the beam 32a. In the state of being folded back to the side and shortened in length, the vehicle is held by one of the L-shaped pieces 1g provided at appropriate positions on both side surfaces of the self-propelled vehicle to proceed.

To start spraying, the boom 30 is rotated 90 degrees from the side of the vehicle to project the boom in the lateral direction, the hook 10a of the fixing means is hooked on the ring 8f, and the lever piece 10b is rotated and inverted. , Fix the connecting rod and the boom support rod. Of course, the boom can be attached after fixing the connecting rod and the boom support rod. Next, in the driver's seat, the switch of the motor cylinder 5 is operated in the forward and reverse directions to extend and contract the motor cylinder 5 and adjust the height of the spray rod 50 to a desired position. After spraying on one side of the vehicle traveling direction, the brake motor M is operated to reverse the boom, and the chemical liquid is sprayed while retracting while the boom is moving backward, and the spraying on both sides of the vehicle is completed.

[0034]

With the boom sprayer device according to the first aspect of the present invention, even when the spraying target is high or low, or when the spray cannot reach the target due to the influence of wind, the boom sprayer device can be freely moved even while traveling. The height of the spray nozzle can be adjusted up and down, and uniform spraying of the chemical liquid can be performed. When spraying the drug solution to crops with different heights and the required height adjustment of the nozzle cannot be covered by the vertical movement of the boom support, by changing the connecting position of the holding means and the locking part, The height of the boom can be changed significantly. Therefore, spraying can be performed for almost all crops. In addition, since the boom support rod can rotate with respect to the connecting rod, the boom, which is an obstacle when the boom sprayer device simply travels, can be easily accommodated along the side surface of the self-propelled vehicle for traveling. it can.

According to the boom sprayer device of the second aspect of the present invention, the column and the boom support rod are
Both are prisms, and by selecting the locking portion and the holding means so that when they are fixed, their surfaces abut, there is no backlash between the boom support rod and the support after fixing. The mutually abutting surfaces strengthen the fixed state, and with a simple structure, it is possible to firmly hold the horizontally long boom.

[Brief description of drawings]

FIG. 1 is an explanatory view of a boom sprayer device of the present application as viewed from the front.

FIG. 2 is an explanatory view of the device of FIG. 1 viewed from the right side.

FIG. 3 is an explanatory diagram showing a state in which the boom is separated from the vehicle.

FIG. 4 is an explanatory view showing a state in which the boom is attached to the boom support.

FIG. 5 is an explanatory diagram showing a configuration of a boom support.

FIG. 6 is an AA cross-sectional explanatory view of FIG.

7 is a cross-sectional view taken along line BB of FIG.

[Explanation of symbols]

1 self-propelled vehicle 2 chemical tank 3 vertical axis M motor 5 motor cylinder 6, 7 Swing arm 8 connecting rod 9 Boom support rod 10 Fixing means 11 screw rod 30 boom 31 props 34 Locking piece 50 spray rod 51 spray nozzle

Claims (2)

(57) [Claims] 1. A self-propelled vehicle equipped with a chemical liquid tank and a chemical liquid pressure-feeding means, and a pair of swing arms provided at a vertical interval on a vertical axis supported by the self-propelled vehicle at predetermined intervals. In the vertical direction so as to be swingable in the vertical direction, and the other end of each swinging arm is pivotally connected to the support of the boom having the spray rod to form a four-joint link having the vertical shaft as a fixed joint. A boom sprayer device in which a telescopic drive means is pivotally supported between the vertical shaft and any one of the swing arms or a boom support body, wherein the boom support body comprises a pair of swing arm arms. The boom support rod includes a connecting rod that pivotally supports the other end of the connecting rod at a predetermined interval, and a boom supporting rod that is arranged in parallel with the connecting rod and is supported so as to be rotatable and fixable with respect to the connecting rod. Is fixed to the columns that make up the boom. Pitch holding means interval for removably supporting the engaging portion formed at a plurality of locations in the boom sprayer apparatus characterized by being formed in a plurality of locations at the same pitch interval. 2. A boom supporting rod and a supporting column constituting the boom are both prisms, and one of a holding means provided on the boom supporting rod and a locking portion provided on the supporting column has a fixed pitch interval on the prism. And the other is a locking piece that is provided on both the left and right sides of the prism, and the other is a locking piece that is provided on the prism at the same pitch interval and that can hold the one prism from both the left and right sides and can be locked to the protrusion. The boom sprayer device according to claim 1, wherein the boom sprayer device is configured.