JPS6344132Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a boom sprayer with an improved boom portion.

As shown in FIG. 1, a conventional boom sprayer is equipped with a frame-shaped boom body 2 that protrudes toward the side of a vehicle body 1 that can run, and the boom body 2 has a large number of nozzles. 3 is installed. A telescopic boom 4 is telescopically housed within the frame of the boom body 2. As shown in FIG. 2, the telescopic boom 4 is equipped with a large number of nozzles 6 each having an on-off valve 5. At the tip of the boom body 2 is an on-off valve 5.
An opening/closing operation piece 7 that can be engaged with the opening/closing levers 5a, 5b to perform opening/closing operations is attached. Therefore, when the telescopic boom 4 is extended, the opening/closing lever 5a of the on-off valve 5 is sequentially opened by the opening/closing operation piece 7, and when the telescopic boom 4 is retracted, the opening/closing lever 5b is opened/closed. Since it is closed by the piece 7, it is possible to eliminate uneven distribution of the chemical solution.

However, since the telescopic boom 4 is installed inside the frame of the boom body 2, in order to deliver the chemical solution from the chemical tank to the nozzle 6 of the telescopic boom 4, there is a gap between the tip of the boom body 2 and the tip of the telescopic boom 4. When a telescopic rigid conduit or coil hose is used, a similarly telescopic rigid guide rod must be installed to hang the coil hose, which complicates the structure. In addition, an on-off valve 5 is provided at the spout 6 of the telescopic boom 4.
Since the telescopic boom 4 is attached to each vehicle, the weight of the telescopic boom 4 increases, and the strength of the boom body 2 supporting the boom body 2 must be made strong, which causes problems such as an increase in the price of the entire vehicle and deterioration of fuel efficiency.

This invention was developed in view of the above-mentioned circumstances, and its purpose is to enable the telescopic boom to be telescopically extended substantially to the outside of the boom body by means of guide means formed along the sides of the boom body. An on-off valve is provided at each spout of the boom body, and an operating means is attached to the base of the telescopic boom to engage with an on-off lever of the on-off valve to open and close the on-off valve. The chemical solution tank and the nozzle of the telescopic boom can be easily connected through a pipe.
Furthermore, by making the telescoping boom lighter, the boom body can be formed more easily, and the entire vehicle can be made lighter, as well as a boom sprayer that is inexpensive and has good fuel efficiency.

This invention will be described in detail below based on the accompanying drawings.

FIG. 3 is a plan view showing a boom sprayer according to this invention. In the drawing, 10 is a vehicle body that can travel, and at the rear of the vehicle body 10, a plurality of nozzles 11 are arranged in a line at approximately regular intervals. will be placed. Further, at the rear of one side of the vehicle body 10, a boom body 12 is pivotally supported by a support shaft 13 so as to be swingable in a horizontal plane. A guide groove 15 is formed in one side of the boom body 12 along the longitudinal direction (as shown in FIG. 6). A telescopic boom 16 is extendably disposed within the guide groove 15, and the telescopic boom 16 has a roller 17 pivotally supported at the base of the telescopic boom 16 and a roller 18 pivotally supported at the tip of the boom body 12. It is said that it can be expanded and contracted by. Note that the guide groove 15 and the rollers 17 and 18 constitute a guide means. Further, a wire drum 20 rotatably driven by a hydraulic motor 19 is attached to the base of the boom body 12 (shown in FIG. 4).
One end 21 a of the wire rope 21 wound around the wire drum 20 is connected to the base of the telescopic boom 16 via a pulley 22 attached to the tip of the boom body 12 , and the other end 21 a of the wire rope 21 is connected to the base of the telescopic boom 16 .
1b is directly connected to the base of the telescopic boom 16.
and a wire drum 20 driven by a hydraulic motor 19
The rotation of the telescopic boom 16 causes the telescopic boom 16 to extend and retract.

A plurality of nozzles 23, which are jet ports, are arranged at approximately constant intervals on the boom main body 12, and each nozzle 23 is equipped with an on-off valve 24.
An opening/closing lever 25 is formed on the opening/closing valve 24 . Further, each nozzle 23 is connected by a connecting pipe 26 attached to the boom main body 12 (shown in FIG. 6),
The base of the connecting pipe 26 is connected to a chemical tank (not shown). A wire 29 is stretched across the upper part of the boom body 12 between support rods 27 and 28 erected at the tip and base ends of the boom body 12, and a coil hose 30 is suspended from the wire 29. The base of the coil hose 30 is connected to the aforementioned chemical tank, and the tip of the coil hose 30 is connected to a nozzle 31 that will be described later.

The above-mentioned telescopic boom 16 is provided with the above-mentioned plurality of nozzles 31, which are jet ports, at approximately constant intervals. Each nozzle 31 is connected by a connecting pipe 32, and the base of the connecting pipe 32 is connected to a flexible connecting hose 33.
It is connected to the tip of the coil hose 30 described above. Further, a triangular plate-shaped opening/closing operation piece 34 serving as an operating means is attached to the base of the telescopic boom 16 via a support plate 35 so as to be able to engage with the opening/closing lever 25 of the aforementioned opening/closing valve 24 .

Since the boom sprayer according to this invention is as described above, when spraying a chemical, first the boom body 12 is swung to protrude to the side of the vehicle body 10, and the hydraulic motor 19 is used to drive the wire drum. 20 in the direction of arrow A, and
make a stretching motion. At this time, the opening/closing operation piece 34 engages with the opening/closing lever 25 of the nozzle 23 of the boom body 12 in order from the base end side to open the opening/closing valve 24, and when the opening/closing valve 24 is in the extended state, all the nozzles 23 are ejected. It becomes possible.

When narrowing the spraying width during the spraying work, when the wire drum 20 is similarly rotated in the direction of arrow B and the telescopic boom 16 is retracted, the opening/closing lever of the nozzle 23 on the tip side of the boom body 12 The opening/closing operation pieces 34 are engaged in order from 25 onwards, and the opening/closing valve 2
4 is in the closed state, and the nozzle 31 of the telescopic boom 16
It is possible to prevent the medicine from being sprayed in duplicate, and it is possible to eliminate uneven spraying of the medicine.

At this time, according to this invention, the telescopic boom 16 is telescopically disposed substantially on the outer side of the boom main body 12 by the guide means formed along the side of the boom main body 12. Since the base of the telescopic boom 16 is always exposed to the outside when the telescopic boom 16 is extended or contracted, it is difficult to This also does not require any special equipment on the telescopic boom 16 side, and can be facilitated by, for example, being connected to the connecting pipe 32 located at the base of the telescopic boom 16 by a simple flexible connecting hose 33. .

In addition, the nozzle 31 of the telescopic boom 16 is not equipped with an on-off valve unlike conventional ones, but is mounted on the nozzle 23 on the boom body 12 side, so the weight of the telescopic boom 16 can be reduced. Therefore, the structure of the guide means that supports the telescopic boom 16 can be made relatively simple as described above, and the weight of the vehicle as a whole can be reduced.
Moreover, it has the advantage of being inexpensive and having better fuel efficiency, and its utility value is remarkable.

[Brief explanation of the drawing]

1 and 2 are rear views and side views of the nozzle of a conventional boom sprayer, FIG. 3 is a plan view of the boom sprayer according to this invention, and FIGS. 4 to 6 are plan views of the same boom, They are a rear view and a side sectional view. In the drawings, 10...vehicle body, 12...
...Boom body, 15...Guide groove, 16...Telescopic boom, 17, 18...Roller, 23, 31...Spout (nozzle), 24...Opening/closing valve, 25...Opening/closing lever, 34...Operation means (opening/closing operation piece).

Claims (1)

[Scope of utility model registration request] A boom sprayer is provided with a boom main body having a large number of nozzles attached to a vehicle body that can run, and a telescopic boom having a large number of nozzles attached to the boom main body that is extendable and retractable, wherein the telescopic boom is connected to the boom main body. is telescopically disposed substantially on the outer side of the boom body by means of guide means formed along the sides of the boom body, an opening/closing valve is provided at each spout of the boom body, and an on-off valve is provided at the base of the telescoping boom. A boom sprayer comprising an operating means that engages with an opening/closing lever of the opening/closing valve to open/close the opening/closing valve.