JP2002332198A - Temporary support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary support device that can temporarily support vertically lining electric wires as using a sub boom as it is without an increase in the strength thereof. SOLUTION: The temporary support device 30 comprises a turning part 31 pivotally mounted on an upper end of a vertical post 17, a sub boom supporting member 33 vertically swingably mounted on the turning part 31, the sub boom member 35 movably supported on the sub boom supporting member 33, a bracket 37 vertically swingably pivoted on a tip of the sub boom member 35, a load detector 40 mounted on the bracket 37, a temporary arm member 60 detachably mounted on mounting parts 38 attached to a top portion and a tip side wall portion 40a of the load detector 40, and electric wire supports 63 detachably mounted on the temporary arm member 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary support device, and more particularly, to a sub-boom attached to a tip of a boom, and an overhead cable provided at the tip of the sub-boom and arranged horizontally or vertically. And a supporting means for supporting the temporary support.

[0002]

2. Description of the Related Art When performing power distribution work such as replacement of insulators disposed on a power pole, an aerial work vehicle having a temporary support device at the tip of a telescopic boom that can be freely raised and lowered is generally used.
The temporary support device includes a sub-boom mounted at least at the tip of the boom so as to be able to move up and down, a bracket mounted at the tip of the sub-boom so as to be swingable in a vertical direction, and a load detection device mounted at a tip end side of the bracket. Vessels,
There is a configuration that includes a support unit attached to an upper portion of a load detector and supporting an electric wire that is laid in a horizontal direction. The support means is attached to the upper part of the load detector and is disposed on the temporary arm member extending in the horizontal direction so as to extend upward.

[0003] In order to replace the insulator attached to the utility pole by this aerial work vehicle, the telescopic boom is operated to move the temporary support device near the insulator to be replaced, and to replace the electric wire connected to the insulator. After supporting with a temporary support device in place of the pole to be supported, the electric wire is removed from the insulator and replaced with a new insulator.

[0004]

In the case where electric wires are laid between electric poles in a vertical direction, a temporary arm member extending in the horizontal direction is moved up and down to replace an insulator attached to the electric pole. It may be inserted between adjacent wires in the direction and moved below the wire temporarily supporting the support means, but if the gap between the adjacent wires is narrow, the wire may be moved below the wire temporarily supporting the support means. However, even if the support means can be moved below the wire temporarily supporting the wire, the temporary arm member or the like may come into contact with another wire adjacent thereto and damage the wire.
For this reason, it may not be possible to temporarily support the electric wire and replace the insulator.

Therefore, a method has been proposed in which a temporary arm member is vertically attached to a side wall portion of the load detector and moved below the wire for temporarily supporting the support means, and the wire is temporarily supported by the support means. However, in this method, the distance between the tip of the sub-boom and the support means for temporarily supporting the electric wire is increased, so that a large bending moment acts on the tip of the sub-boom. There is a fear that it will occur. As a result, there has been a demand for a temporary support device that can temporarily support vertically arranged electric wires by directly using the sub-boom that has been used so far.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and has a temporary support capable of temporarily supporting electric wires arranged in a horizontal direction and a vertical direction by directly using a sub-boom used up to now. It is intended to provide a device.

[0007]

In order to solve the above-mentioned problems, a temporary support device according to the present invention comprises a support member (for example, a sub-boom in the embodiment) attached to a base (for example, a sub-boom support member 33 in the embodiment). Member 35)
And support means (for example, the wire support 63 in the embodiment) for supporting an overhead cable (for example, the wire D in the embodiment) provided at the tip of the support member and arranged in a horizontal or vertical direction. A vertical load detector that detects a vertical load acting on the overhead cable when the overhead cable is supported by the support means, and detects a horizontal load acting on the overhead cable. A load detection unit (for example, the load detector 40 in the embodiment) in which the horizontal load detection unit and the horizontal load detection unit are arranged at right angles is attached to the tip of the support member.

[0008] According to the temporary support device having the above structure, when the overhead cable is supported by the support means,
When a vertical load acts on the support means from the overhead cable, the vertical load detector detects the vertical load, and when a horizontal load acts on the support means from the overhead cable, the horizontal load detector detects the horizontal load. I do.

Here, when temporarily supporting the overhead cables erected in the vertical direction, a load detector is attached to the tip side wall of the bracket attached to the tip of the sub-boom, and the load detector is attached to the tip side wall of the load detector. Compared with the conventional method in which the support means is attached, the present invention reduces the distance between the support means for temporarily supporting the overhead cable and the tip of the support member since the load detector is attached to the tip of the support member. be able to. As a result, the moment acting on the tip of the support member can be reduced, and the support member is used as it is without increasing the strength of the support member that has been used so far, and the support member is erected along the vertical direction by the support means. Can be temporarily supported.

[0010] In the temporary support device having the above-described structure, a mounting portion capable of selectively mounting the support means may be provided on an upper portion and a side portion of the load detecting means.

According to the temporary support device having the above structure, when temporarily supporting the overhead cables erected in the vertical direction, the support means is mounted on the mounting portion provided on the side of the load detecting means. Further, when temporarily supporting the overhead cables laid horizontally in a horizontal direction, the supporting means is mounted on a mounting portion provided above the load detecting means. In this way, by mounting the support means to the mounting portion disposed on either the upper part or the side part of the load detection means, not only the overhead cables laid horizontally and also vertically, but also the vertical cables The erected overhead cable can be temporarily supported.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. This embodiment shows an aspect of an aerial work vehicle provided with a temporary support device at the tip of a boom that is attached to a vehicle body so as to be able to move up and down, extend and retract, and pivot.

Before describing the temporary support device according to the present invention, an aerial work vehicle equipped with the temporary support device will be described. As shown in FIG. 1, the aerial work vehicle 1 is configured with a truck as a base, has a driving cabin 5 at a front portion of a vehicle body 3, and has both left and right sides of the vehicle body behind the driving cabin 5. An outrigger jack 7 that protrudes outward and lifts and supports the vehicle body 3 is disposed in the portion. At the rear of the vehicle body 3, there is provided a swivel table 9 which is driven by a rotation motor 11 built in the vehicle body 3 and is configured to be capable of horizontal rotation.

A boom 13 having a base end pivotally attached thereto is mounted on an upper portion of the swivel table 9, and the boom 13 is configured to be able to move up and down by an up-and-down cylinder 17. The boom 13 is configured to be telescopically moved by a telescopic cylinder 15 built in a nested combination of a base boom 13a, an intermediate boom 13b, and a distal boom 13c. At the tip of the tip boom 13c, a vertical post 17 which is always operated and controlled to be vertical regardless of the up-and-down angle of the boom 9
Is pivoted. A work table 21 is attached to the upper part of the vertical post 17 via a horizontal arm 19 so as to be pivotable.

Next, the temporary support device 30 will be described. The temporary support device 30 includes a rotating part 31 pivotally attached to the upper end of the vertical post 17, a sub-boom support member 33 attached to the upper part of the rotating part 31 so as to be vertically swingable,
A sub-boom member (support member) 35 movably supported by the sub-boom support member 33; a bracket (connecting means) 37 pivotally connected to the tip of the sub-boom member 35 so as to be vertically swingable; A mounted load detector 40, a provisional arm member 60 detachably attached to the upper portion and the tip side wall of the load detector 40, and a provisional arm member 6
0 and a wire support 63 that is detachably attached to the cable support.

The sub-boom support member 33 has an insertion hole (not shown) through which the sub-boom member 35 is inserted. The sub-boom member 35 is inserted into the insertion hole, and the sub-boom support member 33 and the sub-boom member 35 are formed. The sub-boom member 35 is configured to be fixed to the sub-boom support member 33 by passing a fixing pin through a positioning hole (not shown). The bracket 37 is configured so that the swing angle can be adjusted to a predetermined angle in accordance with the elevation angle of the sub-boom member 35 and fixed.

A load detector 40 is provided above the bracket 37.
Is attached. As shown in FIG. 2, the load detector 40 includes a horizontal load detector 41 extending in the left-right direction and a vertical load detector 51 extending in the vertical direction. The horizontal load detector 41 is mounted on the bracket 37 so as to extend in the horizontal direction, and is formed so as to surround the horizontal slide rail 42 from above and from both left and right directions. A pair of horizontal urging springs 44 disposed on the left and right sides of the lower part of the horizontal slide rail 42 to urge a force against the moving direction of the horizontal bracket 43, and the movement of the horizontal bracket 43. And a horizontal movement detection sensor 45 for detecting

The horizontal bracket 43 is attached to the horizontal slide rail 42 so that the horizontal bracket 43 does not come off the horizontal slide rail 42 even when a force is applied in the vertical direction. The horizontal biasing spring 44 is mounted in a compressed state, and is configured so that the horizontal bracket 43 moves in the left-right direction when a horizontal load of a predetermined value or more is applied. A pair of horizontal movement detection sensors 45 are provided inside the left and right wall portions of the horizontal bracket 43 in order to detect that the horizontal bracket 43 has moved in any of the left and right directions. The horizontal movement detection sensor 45 is a micro switch and has an operation piece (not shown), and a dog (not shown) attached to the horizontal slide rail contacts the operation piece to detect the movement of the horizontal bracket 43. Is configured.

The vertical load detector 51 is provided with the horizontal bracket 4
A vertical slide rail 53 attached to a distal end of a connection member 52 connected to the upper left side of the third and extending upward, and attached to the distal end of the vertical vertical slide rail 53 so as to surround the vertical slide rail 53 from the distal end side and left and right sides. A vertical bracket 54 that moves vertically on the vertical slide rail 53 and is sandwiched between the upper right side of the vertical bracket 54 and the upper left side of the horizontal bracket 43.
A vertical urging spring 55 for urging a force (upward force) that resists downward movement of the vertical bracket 54, and a vertical movement detecting sensor 56 for detecting the movement of the vertical bracket 54.

The vertical bracket 54 is attached to the vertical slide rail 53 so that the vertical bracket 54 does not come off the vertical slide rail 53 even when a force acts in the left-right direction. The vertical biasing spring 55 has a small elastic coefficient and a large elastic coefficient arranged in series. With this configuration, a small vertical load can be detected. still,
The vertical biasing spring 55 may be constituted by one spring and attached in a compressed state.

A pair of vertical movement detecting sensors 56 are provided inside the left side walls of the horizontal bracket 43 to detect that the vertical bracket 54 has moved in the vertical direction. The vertical movement detection sensor 56 is a horizontal movement detection sensor 45.
, And has an operation piece (not shown), which is configured to come into contact with a dog 57 attached to the vertical bracket 54 to detect the movement of the vertical bracket 54. A mounting portion 58 protruding outward is attached to an upper portion and a left side wall portion of the vertical bracket 54. The mounting portion 58 is formed with two mounting holes 58a arranged with a predetermined gap.

As shown in FIG. 3, the provisional arm member 60 is rod-shaped, and a fastening jig such as a bolt (not shown) is connected to the mounting portion 58 at a substantially central portion thereof while being attached to the mounting portion 58.
A fixing portion 60a that is fixed to pass through 8a is provided. An electric wire support 63 is detachably attached to the temporary arm member 60. As shown in FIG. 1, the wire support 63 has a protrusion 62 configured to be detachable from the temporary arm member 60.
And a four-sided roller 65 attached to the upper part of the protrusion 62
And is configured. The four-sided roller 65 has four rollers arranged in opposition to form an electric wire insertion hole 66 through which the electric wire passes inside these rollers. One end of the roller on the tip side is swingable with a fulcrum, and the other end is configured to be fixed to an adjacent member (not shown).

Next, with regard to the operation of the temporary support device 30 according to the present invention, a replacement operation for replacing insulators while supporting wires installed vertically and arranged in a vertical direction will be described. FIG.
It is assumed that the aerial work vehicle 1 shown in (1) moves to the work site and the vehicle body 3 is lifted and supported by the outrigger jack 7.

First, before describing the operation of temporarily supporting the electric wires erected in the vertical direction by the temporary support device 30,
The operation in the case of temporarily supporting the electric wires D arranged in the horizontal direction will be described. First, as shown in FIG.
The fixing part 60a of the temporary arm member 60 is mounted on the mounting part 58 disposed on the upper part of the robot to make it horizontal. Then, the electric wire D is passed through the four-sided roller 65 of the electric wire support 63 mounted above the pivot position P of the bracket 37, and the electric wire D is passed through the electric wire support 6
3 temporarily supported. Here, since the wire support 63 can be disposed above the pivot position P, when a vertically downward load F acts on the wire support 63 from the wire D, the pivot position P at the tip of the sub-boom member 35 is applied. , The vertical downward load F acts.

Next, a description will be given of the operation of temporarily supporting the electric wires erected in the vertical direction. First, the fixing portion 60a of the temporary arm member 60 is attached to the attachment portion 58 attached to the side of the load detector 40 in the vertical direction. Then, as shown in FIG. 3, the work table 21 is moved to move the four-sided roller 65 of the wire support 63 near the wire D1 connected to the insulator to be replaced. When the four-sided roller 65 moves near the electric wire D, the electric wire D1 is passed through the four-sided roller 65 through the electric wire D1.
1 is provisionally supported by the wire support 63. Then, the electric wire D is removed from the insulator (not shown) attached to the telephone pole (not shown), and the insulator is replaced.

Here, a vertically downward load F caused by the weight of the electric wire D1 acts on the four-sided roller 65 to cause the sub-boom member 35 to rotate.
A bending moment M acting on a pivot position P of the bracket 37 pivotally connected to the tip of the bracket 37 will be considered. When the load F acts on the electric wire support 63, the load F is transmitted to the vertical bracket 54 of the vertical load detector 51 shown in FIG. The bracket 54 is moved downward. When the load F and the urging force of the vertical urging spring 55 are balanced, the vertical bracket 54
Stops, and the vertical movement detection sensor 56 detects the load F.

At the same time, the load F is applied to the horizontal load detector 4.
1 and a bending moment M at a pivot position P between the bracket 37 and the boom member 35 via the bracket 37 and the like.
(That is, M = FL). Here, the horizontal distance L between the electric wire D1 supported by the four-sided rollers 65 and the pivot position P of the bracket 37 is short. This is because the load detector 40 is disposed above the distal end of the sub-boom member 35, so that the projecting distance L1 of the distal end side wall portion 40a of the load detector 40 projecting leftward from the pivot position P is small. .
As a result, the magnitude of the bending moment M acting on the pivot position P can be reduced.

For this reason, instead of the vertical load F, the bending moment M is applied to the sub-boom member 35 manufactured in consideration of the vertical load F acting from the above-described wires arranged in the horizontal direction and the weight of the temporary arm member 60. Even if it works, there is no possibility that the strength of the sub-boom member 35 used so far will be insufficient.
As a result, the vertically arranged electric wires D can be temporarily supported by using the sub-boom member 35 that has been used so far.

In the above-described embodiment, the distal end side wall portion 40a of the load detector 40 projects from the pivot position P by a distance L1.
In the example shown in FIG. 3, the load detector 40 is moved to the base end side of the sub-boom member 35 so that the temporary arm member 60 in the vertical state is
And so on. Further, in the above-described embodiment, as shown in FIG. 2, an example is shown in which the mounting portion 58 is provided separately on the upper portion of the vertical load detecting portion 51 and on the tip side wall portion, but the present invention is not limited to this. As shown in FIG. That is, the mounting portion 58 is integrally formed so as to straddle the upper portion of the vertical load detecting portion 51 and the front end side wall portion. Two mounting holes 58a are provided at both left and right ends of the upper portion of the mounting portion 58, and the mounting portion 5 extending below and below the left mounting hole 58a of the two mounting holes 58a.
Another mounting hole 58a is provided at the lower part of the mounting hole 8a. Thus 3
By arranging the two mounting holes 58a, the mounting hole 58a (the hole indicated by the arrow A) provided in the center can be used when the fixing part 60a is mounted on the upper part of the vertical load detecting part 51 and when the fixing part 6 is mounted.
0a can be used as a common mounting hole 58a when mounting the vertical load detecting portion 51 on the front end side wall portion.

[0030]

As described above, according to the temporary support device of the present invention, the vertical load for detecting the vertical load applied from the overhead cable when the overhead cable is supported by the support means. Attaching load detecting means, which has a detecting section and a horizontal load detecting section that detects a horizontal load acting on the overhead cable from a horizontal direction at a right angle, to the tip of the supporting member, the supporting section is vertically arranged by the supporting means. In the case where the overhead cable is temporarily supported, the load detector is attached to the tip of the support member, so that the distance between the support means for temporarily supporting the overhead cable and the tip of the support member can be reduced. As a result, the moment acting on the tip of the support member can be reduced,
The supporting member can be used as it is without increasing the strength of the supporting member used so far, and the overhead cable erected in the vertical direction can be temporarily supported by the supporting means.

[Brief description of the drawings]

FIG. 1 is a front view of an aerial work vehicle equipped with a temporary support device according to an embodiment of the present invention.

2A and 2B show a temporary support device according to an embodiment of the present invention, wherein FIG. 2A is a plan view of the temporary support device, and FIG. 2B is a front view of the temporary support device; (C) is a right side view of the temporary support device.

FIG. 3 is a front view for explaining the operation of the temporary supporting device according to the embodiment of the present invention.

FIG. 4 is a front view of the load detector according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 30 Temporary support device 33 Sub-boom support member (base) 35 Sub-boom portion (support member) 40 Load detector (connection means, load detection means) 41 Horizontal load detection section 51 Vertical load detection section 58 Mounting section 63 Wire support (support) Means) D Electric wire (flight cable)

Claims (2)

[Claims] 1. A temporary support device comprising: a support member attached to a base; and a support means provided at a tip of the support member and supporting an overhead cable which is installed horizontally and vertically. A vertical load detector that detects a vertical load acting on the overhead cable when the overhead cable is supported by the support means; and detects a horizontal load acting on the overhead cable. A temporary load detecting means in which a horizontal load detecting section is disposed at a right angle to the horizontal load detecting section. 2. The temporary support device according to claim 1, further comprising a mounting portion on an upper portion and a side portion of said load detecting device, wherein said mounting portion can be selectively mounted.