JPS6236536Y2 - - Google Patents

Description

[Detailed explanation of the invention] In boom sprayers, etc., which are used for disinfecting vast vegetable fields and have a boom with a total width of 10 m or more when extended, the long boom can be folded when moving, etc. It is necessary to retract the boom, and various mechanisms for this purpose have been proposed, but the present invention aims to provide a boom tube suitable for use in a telescoping boom.

Next, the present invention will be explained in detail based on the embodiment shown in the figures.

The illustrated embodiment is an example in which the pipe material according to the present invention is used as an intermediate boom in a three-stage telescoping boom of a boom sprayer. This pipe material 5 (hereinafter referred to as intermediate boom) is made of aluminum alloy or the like, and has a substantially rectangular cross section and has a chemical liquid pipe section 4 integrally provided at the bottom.
It is a thin-walled, lightweight extruded hollow tube material.
A band groove portion 11 having an inward U-shaped cross section is integrally provided on both sides thereof and protrudes along the longitudinal direction.

This intermediate boom 5 is inserted into the frame-shaped base boom 1, and the upper side 6 and lower side 7 of the band groove part 11 are inserted.
Then, the upper guide roller 2 and the lower guide roller 3, which are rotatably supported on the inside of the base boom 1, are brought into contact with each other, and the intermediate boom 5 is connected to the base boom 1.
It is held in a flexible manner.

Furthermore, the tip boom 9 of the intermediate boom 5 is inserted, and the inner guide rollers 10 rotatably supported on both sides of the tip boom 9 are held between the inner U-shaped openings 8 of the band grooves 11, and the tip boom 9
is provided on the intermediate boom 5 so as to be extendable and retractable.
By providing spray nozzles 12 at predetermined intervals in the chemical liquid pipe section 4 of each of the above booms, and operating the intermediate boom 5 and the tip boom 9 by an appropriate means using an electric motor, a hydraulic motor, etc. as a drive source, the boom can be operated. A multi-stage telescoping boom for a sprayer is completed.

As described above, the telescopic boom tube material according to the present invention is
Since the inside and outside of the band grooves provided on the sides can be used as guide surfaces for the guide rollers, the overall configuration of the telescopic boom can be simplified, and the section modulus is considerably larger than that of a simple rectangular cross section, making it easier for the boom to Since it has increased strength, it can be made thinner and lighter, making it suitable as a boom material for various multi-stage telescoping booms.

It is also possible to design the band groove part to have an outwardly facing U-shaped cross section as shown at 11' in FIG.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a multi-stage telescopic boom using pipe materials according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the - arrow in Fig. 1, and Fig. 3 is a diagram showing another embodiment of Fig. 2. It is. 5...Hollow pipe material, 11...Groove portion.

Claims (1)

[Scope of utility model registration request] A tube material for a telescopic boom, which is formed by providing a groove portion 11 having a substantially U-shaped cross section along the longitudinal direction of the side surface of a hollow tube material 5.