JPS636312Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a hose that supplies pressure oil or electricity to working equipment at the tip of a multi-stage boom, such as a pole-erecting truck with a drilling device at the tip or an aerial work vehicle with a work platform. The present invention relates to supporting devices such as cables, and particularly to supporting devices such as hoses and cables for vehicles having multi-stage booms of three or more stages.

Conventionally, for pole-erecting vehicles equipped with a drilling device, there is one in which this drilling device is mounted on a two-stage boom.
The extension and retraction stroke of the boom was short, and therefore the distance between the hoses installed from the base boom to the tip boom was short, so there was no particular problem in installing them as they were.

However, in order to expand the working range of the drilling device, if the drilling device can be fixed to the tip boom side of a multi-stage boom of three or more stages, pressure oil cannot be supplied to the tip of the multi-stage boom using a flexible hose. The amount of deflection due to the weight of the supply increases,
There were drawbacks such as the bending radius of the bent portion becoming unstable.

This idea was made with attention to this point, and in a multi-stage boom with three or more stages, a support device for flexible hoses and cables is provided at the tip of the intermediate boom, and the weight of the flexible hoses and cables is reduced. The purpose of this is to eliminate the bending caused by flexible hoses and cables, and at the same time extend the life of flexible hoses and cables.

Hereinafter, an embodiment of the present invention will be explained based on the drawings, taking a pole-erecting vehicle as an example. 1 is a base boom, inside the boom 1 is an intermediate boom 2, and inside this intermediate boom 2 is a tip end boom. The booms 3 are slidably inserted into each boom, and are extended and contracted by an appropriate drive device provided on each boom.

By the way, at each tip of the base boom 1 or the tip boom 3 described above, a drilling device 5 is selectively fixedly provided via a support bracket 4.
A pressure oil supply device 7 is disposed on the drive motor 6 of the drilling device 5.

This supply device 7 is connected to the base boom 1 from the pressure source.
A flexible hose 9 is guided to the connection port A at the tip of the base boom 1 by fixed piping, and one end of the flexible hose 9 is connected to the connection port A along a holding member 8 made of a steel band having an arcuate cross section, and fixed to the side surface of the base boom 1. After storing the length corresponding to the extension and contraction strokes of the tip boom and the intermediate boom in the case 10, the intermediate boom 2 is moved through a support device 11 rotatably attached to the side of the tip of the intermediate boom 2.
The other end is pivotally connected to the connection port B of the support bracket 4.

Note that a fixed pipe 12 is provided between this connection port B and the above-mentioned hydraulic motor 6.

The support device 11 that linearly supports the flexible hose 9 is composed of a shaft 13 and a roller 14.
is fixed to the side surface of the tip of the intermediate boom 2, and is configured to rotatably support the roller 14 on its shaft.

As described above, the flexible hose 9 is reliably supported at a substantially intermediate position between the base boom 1 and the tip boom 3 by the flexible hose support device, and smooth movement can be expected as the boom expands and contracts.

In addition, in this example, only the oil supply to the drilling device of the pole-erecting vehicle was explained, but it is not limited to the pressure oil supply device, and it is also possible to supply electric cable or pressure oil and electricity at the same time. In addition, it can also be used for aerial work vehicles.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a side view of the boom used in the pole-erecting vehicle of this invention when it is extended, Fig. 2 is a sectional view taken from the - line in Fig. FIG. 1 is a sectional view taken along the - direction in FIG. 1... Base boom, 2... Intermediate boom, 3... Tip boom, 8... Holding member, 9... Flexible hose,
11...Support device.

Claims (1)

[Scope of utility model registration request] In a vehicle having a multi-stage boom, which is configured to supply pressure oil, electricity, etc. to the tip boom side of a multi-stage boom consisting of at least three stages of a base boom, an intermediate boom, and a tip boom, using flexible hoses, cables, etc. In addition to placing a holding member made of a spring steel strip along a flexible hose, cable, etc.,
A support device for hoses, cables, etc. for a vehicle having a multistage boom, characterized in that a roller for supporting the hoses and cables is rotatably supported on the intermediate boom.