JPH1080655A - Boom sprayer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the height of a spray nozzle changeable drastically. SOLUTION: A chemical tank and a chemical forcibly feeding means are provided on a self-traveling vehicle. On a vertical shaft 3 provided on the vehicle, a parallel link taking the shaft 3 as a fixed knot is formed, and a boom supporting rod 9 is made vertically movable by an extension and contraction driving means 5. On the boom supporting rod 9, holding means 11 for freely attachably and detachably supporting engaging pieces 34 formed on a support 31 of a boom in plural places at a prescribed pitch spacing are formed in plural places at the same pitch spacing. Thus, a boom for horizontally supporting an atomizing pole is adjusted by the extension and contraction driving means 5 and the selection of the joined position of the engaging pieces 34 and the holding means 11 to adjust the height of a nozzle 51 drastically, then chemicals are sprayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a horizontal spray nozzle supported by a boom (jib) held by a self-propelled vehicle.
The present invention relates to a boom sprayer that sprays a chemical solution over a wide area, and more particularly to a boom sprayer device that can freely adjust the height of a spray nozzle.

[0002]

[Prior art]

[0003] A boom for supporting a spray rod provided with a large number of spray nozzles in a vehicle such as a tractor by extending substantially horizontally in a lateral direction by a boom, and spraying a chemical solution in a chemical solution tank by a power sprayer mounted on the tractor. Sprayers are used. In a narrow place of arable land, in order to make effective use of the control road on which the traveling vehicle runs, the spray rod is extended to one side on 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.

[0004] 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 type of crop. In addition, the boom sprayer device of the single boom type needs to reverse the boom every time the ridge end is reached, and frequently repeats the adjustment of the height of the nozzles and the reversal of the boom each time. 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 that can perform these operations automatically in the driver's seat is desired.

[0005]

SUMMARY OF THE INVENTION A first object of the present invention is to disclose a boom sprayer device that can easily raise and lower the height of a spray nozzle 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 a boom according to the type of crop and changing the degree of growth of the crop. Accordingly, it is an object to disclose a boom sprayer device which can be adjusted up and down in a 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 which can automatically perform a left-right reversal operation of a boom holding a spray rod in a driver's seat.

[0008]

A first gist of the present invention is to provide a chemical liquid tank and a chemical liquid feeding means on a self-propelled vehicle, and to have a predetermined interval in a vertical direction on a vertical axis supported by the self-propelled vehicle. A pair of swing arms are pivotally mounted at one end thereof in a vertically swingable manner, and the other end of each of the swing arms is pivotally connected to a boom support so that the vertical axis is a fixed joint. 4
A knot link is formed, and the telescopic drive means is rotatably supported at both ends between the vertical axis and any one of the swing arms or between the boom support and the boom support. A holding means for detachably supporting a boom having a spray rod is provided.

In the above description, a typical example of the chemical liquid pressure feeding means is a chemical liquid conduit such as a pump driven by an engine output of a self-propelled vehicle and a hose connected to a discharge port of the pump. The expansion / contraction drive means is pivotally attached at one end to the vertical axis, and is pivotally attached to the swing arm at the other end, and is operated so as to extend or reduce the distance between the pivot portions. Typically, an air cylinder or a hydraulic cylinder, or a motor-driven worm or a rotating female screw cylinder as shown in the embodiment described below, is screwed, and reciprocally driven according to the forward / reverse rotation of the motor. The motor cylinder includes a screw shaft and the like.

The boom holding the spray rod has a vertical member (post) and a member (beam) extending in the horizontal direction. The vertical member supports a truss-like beam material extending horizontally, A rod-shaped beam member having a base end supported by a member and an upper end of a vertical member interposed between and supported by a suspending string such as a wire may be used. In some cases, instead of the rod-shaped beam, a chemical solution conduit formed of a rigid tube also serves as the beam. As a detachable holding means for the boom and the boom support, a screw rod provided on one of the vertical member of the boom and the boom support is inserted into a through hole provided on the other, and a through hole of the screw rod is provided. A commonly used locking structure such as a method of screwing a fastening screw into the protruding portion and fastening and fixing the same, and a combination of a projection or a groove described later in the embodiment and a hook fitted to the same can be adopted.

[0011] The boom sprayer device according to the first gist comprises:
When the telescopic drive means is in the driver's seat, the telescopic drive means is expanded or contracted by a rotation direction switching operation of a direction switching valve or a motor switch, so that the boom support which forms a four-joint link with the vertical axis, which is a fixed joint, is By setting the length of the vertical swing arm and the length between the joints of the boom support and the vertical swing arm, it is possible to move up and down while changing from the vertical posture to the inclined posture or vice versa. it can.

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

As a special case of the four-bar link, a parallel link is constituted by making the pair of upper and lower swing arms equal length and making the distance between the pivotal joints at both ends of the pair of swing arms equal. There are cases. In this case, the boom support always moves up and down while maintaining the vertical posture (the posture parallel to the vertical axis) by the expansion and contraction operation of the expansion and contraction drive unit. Therefore, when the field is flat, the parallel link is advantageous because the nozzle position can be easily adjusted according to the difference in crop height.

In a four-joint link having a vertical axis as a fixed joint, either one of the upper and lower swing arms or both swing arms can be constituted by members whose length can be freely adjusted to be shorter or longer. For example, even when making parallel links,
By changing the length of one swing arm, the boom support can be tilted left and right with respect to the vertical axis, and the posture of the boom with respect to the slope can be controlled. The length-adjustable member may be a double-pipe expandable member that can be fixed at an arbitrary length by a fixing means, a square bar having through holes arranged at a predetermined pitch, and a play on the square bar. A combination of a perforated sheath body to be fitted and a fixing pin penetrating the hole and the through hole of the sheath body at the same time, or the above-mentioned expansion / contraction drive means can be cited. In particular, when the telescopic drive means is used as the swing arm, the inclination of the boom can be freely adjusted in the driver's seat.

According to a second aspect of the present invention, there is provided a boom sprayer device defined by the first aspect, wherein the boom supporter pivotally supports the other end of the pair of swing arms at a predetermined interval. And a boom support rod arranged in parallel with the connecting rod and rotatably and fixedly supported with respect to the connecting rod, wherein the boom support rod has a fixed pitch interval between the columns constituting the boom. The boom sprayer device is characterized in that holding means for detachably supporting the locking portions formed at a plurality of locations are formed at a plurality of locations at the same pitch interval.

The boom sprayer device according to the second aspect has height adjusting means for moving the boom support up and down in a driver's seat, as in the first aspect, and includes one vertical member constituting the boom. By providing the locking portion provided on one of the pillars and the fixed portion provided on the boom support rod side at the same pitch at a plurality of locations,
The height of the boom can be significantly changed by changing the coupling location between the fixing portion and the locking portion. 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 gist. Since the boom support rod can rotate with respect to the connecting rod, when the boom sprayer device simply travels, the boom that becomes an obstacle can be easily stored and traveled along the side surface of the self-propelled vehicle.

According to a third aspect of the present invention, there is provided a boom sprayer device defined by the second aspect, wherein the boom support rod and the column forming the boom are both prisms, and a holding means provided on the boom support rod. Either one of the locking portions provided on the column is formed of projections provided on the left and right 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 the boom sprayer device is constituted by a locking piece that can be locked to the projection while holding the prism of the right and left sides.

This shows an embodiment of the boom sprayer device according to the second aspect, in which the column and the boom support rod are both prisms, and when fixed, the surfaces of the columns are in contact with each other. By selecting the locking portion and the holding means, there is no play between the fixed boom support rod and the support, the contact surfaces of each other are strengthened in a fixed state, and a simple configuration is adopted. The long boom can be firmly held.

According to a fifth aspect of the present invention, there is provided a boom sprayer apparatus defined by the first, second, or third aspect, wherein the vertical axis is controlled by a power transmission means having a torque limiter. A single boom type boom sprayer device characterized in that it is configured to be rotated left and right by a motor with means.

In a so-called single boom type boom sprayer device of the type in which a boom is provided to protrude to one side of a self-propelled vehicle and the boom is turned 180 degrees on the return path and the opposite side is sprayed, the boom is provided. The reversal operation may be performed manually, but it is desirable to perform the reversal operation using a suitable vertical axis driving unit. As the driving means, a known driving method such as a method in which a crankshaft is attached to a vertical shaft and driven by a reciprocating linear moving means, or a method in which a gear or a pulley is attached and connected to a rotary driving means, can be adopted. .

As one example, a case where the vertical shaft is rotated left and right by a motor with a brake via power transmission means having a torque limiter can be exemplified. Examples of a motor with a brake include a brake motor in which a brake mechanism that uses frictional force is activated when the power to the motor circuit is stopped, and a motor that short-circuits the motor coil when the power to the motor circuit is stopped to actuate a magnetic brake by back electromotive force. It is. In the case of a manual reversing mechanism, a fixing means to suppress the boom swing and displacement is required, but in the case of a motor with a brake, this is not necessary, and the motor is stopped at any position and the state is fixed. it can.
In the driving means according to the fifth aspect, the motor with the brake means prevents the displacement of the boom during spraying, and the torque limiter buffers the impact when an unduly large force is applied to the boom, thereby reducing the impact of the apparatus. Prevent damage.

[0022]

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

A rectangular frame 1b extending upward from the front end of the frame 1a of the vehicle 1 is formed on the front surface of the vehicle 1. Around the center of the rectangular frame 1b, The vertical shaft 3 is rotatably supported by 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 is
B is rotated by a driving sprocket 4 attached to an output shaft of a brake motor M fixedly mounted on the shaft b via a torque limiter (not shown) through a wound endless chain 4a.

An upper swing arm 6 and a lower swing arm 7 are provided above and below the vertical shaft 3, respectively, at one end 6a, 7 respectively.
In FIG. 7 (a), it is pivotally supported in a vertically swingable manner. At the other end 6b, 7b of each of the upper and lower swing arms 6, 7, a connecting rod 8 having a length equal to the distance between the one ends 6a and 7a of the swing arm is provided at its upper end 8a and lower end 8b. By being pivotally connected to each other, parallel links having the vertical axis 3 as a fixed node are formed. The connecting rod 8 and a boom support rod 9 described later constitute a boom support.

Between the vicinity of the lower end of the vertical shaft 3 and the upper swing arm 6, there is provided a motor cylinder 5 as a telescopic drive means.
Is interposed. The motor cylinder 5 includes a drive motor 5a, a screw rod 5b screwed into a female screw member (not shown) driven forward and reverse by a motor 5a through a reduction gear train, and a lower end pivotally connected to a lower end of the vertical shaft. Dressing screw rod 5
and a cylinder 5c for guiding the upper and lower arms 6a and 6b, which expands and contracts by rotating the motor 5a forward and backward, and drives the upper swing arm 6 to which the screw rod 5b is pivoted up and down. Thereby, the connecting rod 8 forming the parallel link moves up and down while maintaining the vertical posture.

The connecting rod 8 has a prismatic shape, and has two shaft mounting pieces 8 at upper and lower positions on the side opposite to the vertical axis 3 of the rod 8.
c and 8d are protrudingly provided. A prism-shaped boom support rod 9 is provided parallel to and in parallel with the connecting rod 8, and shaft mounting pieces 9c and 9d provided on the side surfaces of the boom support rod 9 corresponding to the shaft mounting pieces 8c and d. , Are rotatably supported at a slight distance from the connecting rod 9 by being in contact with the shaft attachment pieces 8c and 8d and supporting the shaft. The connecting rod 8 is provided with a fixed arm 8e extending from a side surface perpendicular to the side surface having the shaft attachment pieces 8c and d to a side opposite to the vertical shaft 3 and extending from the side surface. A semicircular ring 8f is fixed 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).
A fixing means 10 having a lever piece 10b to be d) and a bearing piece 10c fixed to the boom support rod and rotatably supporting (10e) the lever piece 10b is provided. In a state where one side surface of the boom support rod is in contact with the fixing arm 8e, the hook 10a is hung on the ring 8f, the lever piece 10b is rotated, and the fulcrum 10d of the hook is moved to the fulcrum 10e of the lever piece. , The fixing arm 8e can be fixed to the side surface of the boom support rod.

On the side surface of the boom support rod 9 where the shaft attachment pieces 9c and 9d are provided, a screw ring 9a is provided in a horizontal direction.
However, at a predetermined pitch interval, a plurality of locations (in the embodiment, 3
Locations). This screw ring 9a, ...
The screw rod 11 is screwed, and the head 11 of the screw rod 11 is
Both a and the tip 11b protrude from both sides of the boom support rod 9 in the width direction of the boom support rod 9, thereby constituting a boom holding unit. A boom support is constituted by a combination of such a boom support rod and the connecting rod.

On the other hand, on the support 31 of the boom 30, locking pieces 34, 34,... Are provided in accordance with the pitch intervals of the screw rings 9a, 9a,. The locking piece 34
A pair is provided on both sides of a prism 31 composed of a prism, and is fixed by a half so as to sandwich it, and a locking piece is provided on the other side of the locking piece according to the diameter of the screw rod. A cutout portion 34a is formed by being cut 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 engaging 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 bar has been described.
A horizontal shaft protruding from a support is fitted into a through hole provided in a boom support rod, and a retaining means is detachably provided at the end of the horizontal shaft, or the boom support rod is formed of a hollow square pipe. A well-known means such as a method of forming a substantially T-shaped notch therein, forming a T-shaped protrusion on the side surface of the column, and fixing this by dropping into the notch can be employed.

Further, in the embodiment exemplified above, instead of the lower swing arm 7, a member whose length can be adjusted to be shorter or shorter, 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 the motor cylinder is extended and retracted at both ends so as to be rotatable in the vertical direction, the column 31 can be inclined left and right as necessary in FIG. 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 operation and effect can be obtained.

[0032]

In the boom sprayer apparatus having such a configuration, in FIG. 3, the screw rods 11, 11 to which the locking pieces 34, 34 of the boom are to be locked are selected according to the height of the crop, and By turning the head 11a, the locking piece on one side is tightened and fixed between the screw ring 9a and the head 11a, and further, a chemical liquid pressure feeding hose (not shown) is connected to the spray rod supported by the boom. I 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 a state where the length of the self-propelled vehicle is reduced by being turned back to the side, the vehicle is held by one of L-shaped pieces 1g provided at appropriate places on both side surfaces of the self-propelled vehicle.

When spraying is started, the boom 30 is turned 90 degrees from the side of the vehicle to extend 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 turned and reversed. Then, the connecting rod and the boom support rod are fixed. Of course, the boom can be mounted after the connecting rod and the boom support rod are fixed. Next, in the driver's seat, the switch of the motor cylinder 5 is operated in the forward and reverse directions to expand and contract the motor cylinder 5 and adjust the height of the spray rod 50 to a desired position. After spraying on one side in the vehicle traveling direction, the brake motor M is operated, the boom is turned over, and when the chemical solution is sprayed while moving backward, the spraying on both sides of the vehicle is completed.

[0034]

According to the boom sprayer device of the present invention, the height of the spray nozzle can be freely adjusted even during traveling when the object to be sprayed has a height or when the spray cannot reach the object due to the wind. It can be adjusted up and down, and can spray a uniform chemical solution. When spraying chemicals on crops of different heights, if the necessary height adjustment of the nozzle cannot be covered by the vertical movement of the boom support, the locking piece is moved to a higher (or lower) position. By using it fixed on a threaded rod, it is possible to make a drastic change, and it is possible to spray almost all crops.

Further, the single-boom type device is very convenient in a small-scale field, because the device is small and can be manufactured at low cost, and there is no waste in use, and the device can be turned easily.
There was a trouble that the boom reversing operation had to be repeated many times. However, in the device of the present application, the reversing operation is only the switching operation of the switch in the driver's seat, and the adoption of the brake motor eliminates the displacement of the boom during traveling,
In addition, a torque limiter is interposed even if an excessive force is applied to the boom, such as when the motor is overloaded during boom reversal or spraying, or when the boom collides with an obstacle during spraying. Therefore, there is no damage to the motor and the like.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of the device of FIG. 1 as viewed from a right side.

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

FIG. 4 is an explanatory view showing a state in which the boom is mounted on a boom support.

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

FIG. 6 is an explanatory sectional view taken along line AA of FIG. 5;

FIG. 7 is a sectional view taken along the line BB of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Self-propelled vehicle 2 Chemical liquid 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 Support post 34 Locking piece 50 Spray rod 51 Spray nozzle

Claims (6)

[Claims] A self-propelled vehicle is provided with a chemical tank and a chemical solution pumping means, and a pair of swing arms are provided at one end of a vertical axis supported by the self-propelled vehicle at predetermined intervals in a vertical direction. The pivotal arm is pivotally connected in the vertical direction in the vertical direction, and the other end of each of the pivoting arms is pivotally connected to a boom support to form a four-bar link having the vertical axis as a fixed node. A holding means for pivotally supporting the expansion / contraction driving means between the arm and any one of the swing arms or the boom support, and a holding means for detachably supporting the boom having the spray rod is formed on the boom support. A boom sprayer device comprising: 2. The boom sprayer device according to claim 1, wherein the four-joint link having a vertical axis as a fixed joint forms a parallel link. 3. The boom sprayer device according to claim 1, wherein one or both of the pair of swing arms is constituted by a member whose length is adjustable. 4. A connecting rod for pivotally supporting the other ends of a pair of swing arms at a predetermined distance from each other, a boom support, and a boom supporting member arranged in parallel with the connecting rod to rotate and fix to the connecting rod. And a holding means for detachably supporting locking portions formed at a plurality of locations on a column constituting the boom at a constant pitch with respect to the boom supporting rod. The boom sprayer device according to any one of claims 1 to 3, wherein the boom sprayer device is formed at a plurality of locations at a pitch interval of: 5. A boom support rod and a column constituting the boom are both formed of prisms, and one of a holding means provided on the boom support rod and a locking portion provided on the column is provided at a constant pitch interval between the prisms. The other is a locking piece that is provided at the same pitch interval on the right and left sides of the prism and can be locked to the projection while holding the one prism from both the left and right sides. The boom sprayer device according to any one of claims 1 to 4, wherein the boom sprayer device is configured. 6. The boom according to claim 1, wherein the vertical shaft is rotated left and right by a motor with brake means via power transmission means having a torque limiter. Sprayer equipment.