JPH028782B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a boom sprayer, and more particularly to a boom sprayer whose boom can be extended in either direction to the left or right of a traveling device.

As shown in FIG. 1, a conventional boom sprayer of this type has a sprayer main body 4 equipped with a chemical tank 3 that is removably attached to the rear of a traveling device 2 such as a tractor that can travel on wheels 1. At the rear central part of the sprayer main body 4, a first stage boom 6 is provided by a support shaft 5 so as to be able to swing almost horizontally over 180 degrees so as to extend from both left and right sides of the traveling device 2. A second-stage boom 7 is slidably installed on the boom 6 so as to be extendable and retractable in the longitudinal direction, and by swinging the first-stage boom 6 using a hydraulic cylinder or the like,
The boom is configured to be extendable from both the left and right sides of the traveling device 2.

However, in conventional boom sprayers, when the first-stage boom 6 is rocked to change the extension direction of the boom, the center of gravity moves to the rear of the traveling device 2, so there is a risk that the traveling device 2 will fall backwards. In addition, it takes time to swing and change the extension direction of the boom, resulting in a problem of very low work efficiency.

This invention was made in view of the above-mentioned circumstances, and its purpose is to attach a sprayer main body to a traveling device that can run on wheels in a removable manner, and to provide a sprayer main body with a chemical tank. A center boom that is long in the left and right direction is fixed to the main body, and a movable boom that can be extended in the left and right direction of the traveling device by a driving means is slid along the longitudinal direction of the center boom, and a plurality of movable booms are attached to the movable boom. A one-armed boom sprayer whose boom can be extended to both the left and right sides of the traveling device is obtained by communicating the nozzle with which the spray is applied to the chemical tank via an expandable hose. The purpose of the present invention is to provide a boom sprayer that is inexpensive, safe, and highly efficient.

The present invention will be explained in detail below with reference to the accompanying drawings.

FIG. 2 is a schematic plan view showing a boom sprayer according to the present invention. In the drawing, 10 is a traveling device such as a tractor that can run on wheels 11, and a sprayer is equipped with a chemical tank 12 at the rear of the traveling device 10. The main body 13 is detachably attached. At the rear of the sprayer main body 13 is a center boom 14 that is long in the left-right direction of the traveling device 10 and has a C-shaped cross section.
(shown in FIG. 5) is fixed via a mounting member 15. Inside the center boom 14, a movable boom 16 that is long in the left-right direction is engaged and slid along the longitudinal direction of the traveling device 10 so as to be extendable in the left-right direction.

3, 4, and 5 are rear views, cross-sectional views, and cross-sectional views showing the boom of the boom sprayer according to the present invention, in which a hydraulic motor 18 is connected to one end of the center boom 14 via a mounting member 17.
A pinion gear 19 and a sprocket 20 are fixed to the rotating shaft 18a of the hydraulic motor 18. A support shaft 22 is rotatably supported at the other end of the center boom 14 via a bearing member 21, and a pinion gear 23 and a sprocket 24 are fixed to the support shaft 22. And both sprockets 20 and 24
They are connected by a chain 25. Both pinion gears 19 and 23 are meshed with a rack 26 formed at the lower end of a protruding portion 16a formed along the longitudinal direction of the movable boom 16 and having an inverted L-shaped cross section. In addition, the hydraulic motor 18, pinion gear 1
9, 23, sprocket 20, 24, chain 2
5, rack 26, etc. constitute a driving means.

In addition, as shown in Figure 3, the center boom 1
4 and the movable boom 16, there are struts 27, 28, 2 vertically arranged upwardly facing each other.
9 and 30 are arranged, and support columns 27 and 2 respectively.
8. Supports 31 and 32 made of wires or rods are installed between the pillars 29 and 30, respectively, and a coiled extensible coil is suspended across these supports 31 and 32. A coil hose 33 is provided. 3 shows the case where the supports 29 and 30 on the movable boom 16 side are erected downward for easy understanding.
As shown in the figure, both ends of the coil hose 33 are connected to both booms 14 and 1 shown at points A and B, respectively.
6 in the same direction, and communicated with the drug tank 12 and a plurality of nozzles 34 (shown in FIGS. 4 and 5) fixed to the movable boom 16, respectively.

Since the boom sprayer according to the present invention has the configuration described above, the movable boom 16 is connected to the traveling device 1.
1, as shown in FIG. The coil hose 33 is slid to the right, and at this time, the part of the coil hose 33 suspended from the support body 32 is brought into a contracted state, and the drug tank 12 and the nozzle 34 are naturally communicated through the coil hose 33.

On the other hand, when extending the movable boom 16 to the left side of the traveling device 10, as shown in FIG. The moving boom 16 is slid to the left. At this time, the coil hose 33 is contracted and expanded at the portions suspended from the supports 31 and 32, respectively, contrary to the above, and similarly, the drug tank 12 and the nozzle 34 are communicated easily.

According to the boom sprayer according to the present invention, as described above, parts such as a shaft for swinging the boom, a hydraulic cylinder, a hydraulic valve, piping, and other transmission means in the conventional type are unnecessary, and the cost is reduced accordingly. can be achieved. In addition, as mentioned above, in the conventional system, there was a risk that the center of gravity would move backwards when the boom was rocked, causing the traveling device to overturn, but this invention does not have such a problem, and However, with this invention, the force was concentrated on the shaft for attaching the single-stage boom to the sprayer body, so it needed to be strong, so the sprayer body also had to be strong and heavy, but this invention In the boom sprayer, the center boom is fixed to the sprayer body, and when the movable boom is moved, the center of gravity does not move rearward, so the concentration of force is relatively small, so the overall structure can be made lightweight. can.

Further, since the movable boom also slides in the left and right directions, the moving operation can be performed in a relatively short time and more safely.

[Brief explanation of drawings]

1 is a schematic plan view showing a conventional boom sprayer, FIG. 2 is a schematic plan view showing a boom sprayer according to the present invention, FIG. 3 is a schematic rear view showing the boom of the boom sprayer shown in FIG. 2, and FIG. Figures and Figure 5 are - sectional views and - sectional views, Figure 6.
8 are explanatory diagrams showing the operation of the boom shown in FIG. 3 in an easy-to-understand manner. In the drawings, 10... traveling device, 11... wheels, 12... chemical tank, 13... sprayer body, 14... center boom, 16... moving boom, 18... motor (hydraulic motor), 18a...
Rotating shaft, 19, 23... Pinion gear, 26...
Rack, 27, 28, 29, 30... Prop, 3
1, 32...Support, 33...Hose (coil hose), 34...Nozzle.

Claims (1)

[Claims] 1. A sprayer main body is attached to a traveling device that can run on wheels, a chemical tank is provided on the sprayer main body, and a center boom that is long in the left and right direction is fixed to the sprayer main body, and a driving means is attached to the sprayer main body. Therefore, a movable boom that can be extended in the left-right direction of the traveling device is slid along the longitudinal direction of the center boom, and a plurality of nozzles attached to this movable boom are connected to the drug tank via extendable hoses. A boom sprayer that is connected. 2. The drive means comprises a motor mounted on the center boom, a pinion gear connected to a rotating shaft of the motor, and a rack meshed with the pinion gear and fixed to the center boom. A boom sprayer according to scope 1. 3. The hose is suspended from both supports installed between supports that are erected at both ends of the center boom and the movable boom to face each other, and the hose is suspended from both ends of the center boom and the movable boom in the same direction. The boom sprayer according to claim 1, wherein the boom sprayer is a coiled hose fixed to an end of the boom sprayer.