JPS6011920Y2 - Boom insulation cover - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an insulating cover for a boom used in an aerial work vehicle, a crane vehicle, or the like.

Conventionally, aerial work vehicles or crane vehicles used for power distribution work, etc. have been equipped with a cover made of an insulating material such as FRP on the outer circumferential surface of the boom to prevent electric shock accidents caused by contact between the boom and electric wires. It is being covered with

However, because conventional insulating covers were installed so that the inner circumferential surface was in contact with the outer circumferential surface of the boom, rainwater, dust, etc. could accumulate in the gap between the insulating cover and the boom, significantly reducing the insulation performance. there were.

This invention was made in view of the above circumstances,
A first cover with a U-shaped cross section that covers the bottom surface of the boom and the left and right sides of the boom along the longitudinal direction of the boom is provided at a distance from the outer peripheral surface of the boom, and the top surface of the boom and the left and right sides of the first cover are provided along the longitudinal direction of the boom. By installing the second cover, which has a U-shaped cross section and covers along the direction, and separates it from the top surface of the boom and the left and right sides of the first cover, the insulating cover of the boom can prevent rainwater and dust from adhering to it and maintain its insulation performance. The purpose is to provide

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 shows an aerial work vehicle, in which a lower boom 3 and an upper boom 4 are sequentially pivoted to a turntable 2 provided on a vehicle body 1, a work platform 5 is held at the tip of the upper boom 4, and a lower boom 3 and the upper boom 4 are undulated by the expansion and contraction of the undulation cylinder 6 and the bending cylinder 7.
Bend and stretch.

An insulating cover 89 is attached to the outer periphery of the upper boom 4, and as shown in FIG.
The second cover 9 has a U-shaped cross section with side plates 8b, 8b on both ends of the roof plate 9a, and the second cover 9 has side plates 9b, 9 on both ends of the roof plate 9a.
The first cover 8 and the second cover 9 are both made of a material with excellent electrical insulation properties such as FRP using polyester.

Brackets 10.10' made of an insulating material are fixed to both sides of the upper boom 4 at regular intervals along the longitudinal direction of the upper boom 4.
The side plates 8b, sb of the first cover 8 and the side plates 9b, 9b of the second cover 9 are attached to the side plates 12.12' through insulating bushes 11.11' by insulating bolts 12.12'.

The bottom plate 8a of the first cover 8 is the bottom surface 4c of the upper boom 4.
The side plates 8b, 8b of the first cover 8 are spaced apart from the side plates 4b, 4b of the upper boom 4, and the second cover 9
The roof plate 9a is separated from the upper surface 4a of the upper boom 4,
The side plates 9b, 9b of the second cover 9 are the side plates 8 of the first cover 8.
b and 8b.

Next, the effect will be explained.

Since the outer circumferential surface of the upper boom 4, the first cover 8, and the second cover 9 are provided separately from each other, rainwater that has entered between the upper boom 4, the first cover 8, and the second cover is removed from the first cover. The longitudinal end of the cover 8 or the first
Side plates 8b, 8b of cover 8 and side plate 9b of second cover 9,
It flows down from between the rainwater and the rainwater and does not stay inside the rainwater, and dust, etc. also flows down with the rainwater and does not land on the inside.

The outer peripheral surface of the upper boom 4 is ventilated with the outside of the cover, and the ventilation path is formed by the side plates 8b, 8b of the first cover 8 and the side plates 9b, 9b of the second cover 9, and has a sufficient length. This does not impede insulation performance, and since it has good ventilation, any water droplets that remain inside will dry out in a short time.

As described above, the present invention prevents insulation performance from deteriorating due to rainwater, dust, etc. in a boom with an insulating cover attached, so it can improve the safety of aerial work vehicles, crane vehicles, etc. that have an insulating cover attached to the boom. It is valid.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of an aerial work vehicle, and FIG. 2 is a cross-sectional view taken along the line ■-■ of FIG. 1. 4... Upper boom, 8. Song, 1st cover,
9...second cover, 10.10'...curve bracket, 11.11'...curve bush, 12,12'...curve/bolt.

Claims (1)

[Scope of utility model registration request] A first cover having a U-shaped cross section that covers the lower surface of the boom and the left and right side surfaces of the boom along the longitudinal direction of the boom is provided spaced apart from the outer peripheral surface of the boom.
Insulating power of the boom characterized in that a second cover having a U-shaped cross section that covers the left and right sides of the cover along the longitudinal direction of the boom is provided spaced apart from the top surface of the boom and the left and right sides of the first cover. −