JPH0439264Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a device that supports arms and electric wires when traveling in work vehicles such as temporary support construction vehicles that perform electrical work and rebuilding of utility poles. The present invention relates to a center pole support device that allows a center pole to be supported on the side of a boom.

[Prior art and its problems]

Conventionally, in order to efficiently rebuild utility poles while the line is live, the wires and arms were removed from the pole to be replaced, and the wires were supported using temporary arms equipped with arm grips and wire supports. In the current state, the utility poles have been rebuilt, arms are attached to the rebuilt poles, and the wires that were supported by temporary arms are being attached to the arms.

By the way, as shown in FIG. 4, the temporary arm 20 is attached to a center pole 24 that is pivotally supported by a bracket 23 fixed to the tip of a boom 22 of a work vehicle 21, and is used for construction work such as rebuilding a utility pole. Sometimes, the boom 22 is extended in the direction of the existing utility pole to be constructed, and an actuator 25 such as a hydraulic cylinder is used to raise the center pole 24 parallel to the existing utility pole so that it faces the pole, and the temporary arm 20 is used to extend the center pole 24 toward the existing utility pole. They carry out designated work such as rebuilding utility poles. When not in operation, the center pole 24 is configured to be stored parallel to the vehicle body below the boom 22 which is folded down by the actuator 25 and stored, as shown in the figure. ing.
Therefore, when the center pole 24 is in the retracted state, the bracket 23 fixed to the tip of the boom 22
Since the center pole 24 is located in a state where it hangs down, the boom 22 has to be in a high position when it is in a collapsed state, which inevitably causes the work vehicle 21 to fall down.
This raises the overall height of the vehicle, resulting in problems such as a lack of stability when the work vehicle 21 travels.

[Means and actions for solving problems]

In view of the above-mentioned problems, the present invention provides a work vehicle in which a center pole equipped with a temporary arm having an arm gripping device, a wire support, etc. is attached to the end of the boom so as to be able to raise and lower. A rotating member is swingably attached to the side and lower side of the boom, and the center pole is attached to the tip of the rotating member so as to be able to rise and fall, so that the undulating state of the boom is made as low as possible, It is an object of the present invention to provide a center pole support device that reduces the overall height of the vehicle including the boom to increase stability during running, thereby solving the above-mentioned problems.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

In FIG. 1, 1 is a working vehicle, and a rotatable turntable 2 is provided at the rear of the working vehicle 1.
A boom 4 is attached to the turntable 2, which is rotatable, undulating, and extendable by means of an undulating cylinder 3 and a built-in telescopic cylinder. 5 is boom 4
This center pole 5 is attached to the center pole 5, and a temporary arm 7 equipped with a utility pole arm gripping device (not shown) and a wire support 6 is attached to the center pole 5.

The center pole support device according to the present invention will be explained based on FIGS. 2 and 3.

Reference numeral 8 denotes a bracket having a U-shaped planar shape provided at the tip of the boom 4, and its both sides 8a, 8
Hanging parts 8b, 8b are extended to a, and this hanging part 8
A rotating member 9 is pivotally supported by b and 8b. Reference numeral 10 denotes a rotating cylinder, and the upper part of the rotating cylinder 10 is pivotally supported by the bracket 8 by arms 11, 11 protruding along both sides 8a, 8a of the bracket 8.
The lower rod ends of the rotary member 9 are attached to bearings 12, 12 protruding from approximately the center of the rotary member 9.

The center pole 5 is attached substantially parallel to the boom 4 via a joint member 13a pivotally supported at the lower end of the rotating member 9. 14 is an actuator consisting of a hydraulic cylinder that raises and lowers the center pole 5;
4 is pivotally supported by a bracket 9a provided protruding from the rear side of the rotating member 9, and its lower rod end is attached to a hinge portion 13c of a joint member 13b provided toward the rear of the center pole 5.

The operation of the present invention configured as described above will be explained below.

During work such as rebuilding a utility pole, the boom 4 is extended in the direction of the existing utility pole to be constructed by operating the hoisting cylinder 3, and the actuator 1
4, the center pole 5 moves to the rotating member 9.
As shown by the imaginary line in the same figure, with the shaft support of the joint member 13a as a rotation fulcrum, it stands vertically,
This center pole 5 is erected until it is parallel to the existing utility pole and faces the utility pole, and predetermined work such as rebuilding the existing utility pole described above is performed using the temporary arm 7. When not working, the boom 4 is retracted by operating the luffing cylinder 3, and the boom 4 is retracted and positioned above the vehicle body.
When the rotary cylinder 10 is actuated to retract the rod from the state shown in the figure, the rotary member 9 rotates to a position substantially perpendicular to the boom 4 using the shaft support of the rotary member 9 as a rotation fulcrum, and Accordingly, the center pole 5 also rotates upward as shown by the arrow shown in FIG. 3a, and the center pole 5 is positioned on the side of the boom 4 (see FIG. 1). Therefore, the center pole 5 is not located below the boom 4 when the center pole 5 is not in operation, and the boom 4 can be lowered accordingly.

[Effect of idea]

As described above, the present invention provides a work vehicle in which a center pole equipped with a temporary arm having an arm gripping device, a wire support, etc. is attached to the tip of the boom so as to be able to raise and lower. Since the rotating member is swingably attached to the side and bottom side, and the center pole is attached to the tip of the rotating member so that it can be raised and lowered, the center pole is attached to the boom when not in operation. Since the boom is not located at a lower position, the lodging state of the boom is lowered, making the retracted state of the boom very stable, and the overall height of the vehicle including the boom is lower, so the work vehicle when traveling is lowered. It has excellent effects such as increased stability.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of a working vehicle equipped with a center pole support device according to the present invention, and FIG. 2 is a main part of the center pole support device according to the present invention. Perspective view showing 3rd
Figure a is a side view of the same, Figure b is a front view of the same, and Figure 4 is a side view showing a conventional example. 1...Work vehicle, 2...Turntable, 3...
Lifting cylinder, 4...boom, 5...center pole, 6...wire support, 7...false arm, 8...
Bracket, 8a, 8a...Both sides, 8b, 8b
... hanging part, 8c ... upper side, 9 ... rotating member,
9a... Bracket, 10... Rotating cylinder, 1
1... Arm, 12... Bearing, 13a, 13b...
...Joint member, 13c...Hinge part, 14...
...actuator.

Claims (1)

[Scope of utility model registration request] In a work vehicle in which a center pole equipped with a temporary arm equipped with an arm gripping device, a wire support, etc. is attached to the tip of the boom so that it can be raised and lowered, the tip of the boom has a center pole that swings to the sides and bottom of the boom. A center pole support device characterized in that a rotating member is movably attached, and the center pole is attached to the tip of the rotating member so that it can be raised and lowered.