JPH09277183A - Working arm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a working arm which is capable of being stored compactly and easily, and can prevent its workability from being deteriorated at the time of storage. SOLUTION: A lifting member 11 is disposed on an arm supporting member 17 disposed inside a working bench 24 so as to lift freely and a horizontal swivel arm 12 is disposed on the lifting member 11 so as to rotate horizontally. On the horizontal swivel arm 12, the first derricking arm 13 is disposed so as to conduct free horizontal rotation and derricking, and the second derricking arm 14b is disposed on the first derricking arm 13 for free horizontal rotation and derricking. A working device mounting arm, on the top of which a working device is fitted, is formed on the second derricking arm 14b so as to be attached and detached freely. These respective arms 12 and so on are located at a position which is inside the working bench 24 and lower than a top end surface 24b of the working bench 24, in a stored condition folded with each other being overlapped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is attached to a workbench of an aerial work vehicle, and a work device is attached to a tip end of the workbench to assist the work of a worker on the workbench to efficiently work at a high place. Work arm for doing well.

[0002]

2. Description of the Related Art When power distribution work is carried out on an upper part of a power pole, a boom is provided on a vehicle body so that the boom can be moved up and down and extended, and a worktable on which a worker can ride is provided at a tip of the boom. Work vehicles are used. Further, a work arm is often provided on the work table for the purpose of safely performing construction (so-called “hot-line construction”) in a state where power is supplied to the power distribution equipment and reducing the labor of the operator.

The working arm is constructed such that a working device such as a cable cutter or a stripping tool is detachably attached to the tip thereof. Furthermore, these working devices are formed by a plurality of arm members so that they can be moved to a desired working position, and each arm member is configured to be able to move up and down and rotate horizontally. When the work arm is not used, the work arm is removed from the work table so as not to hinder the work, or is folded near the work table so as to be folded at the pivotal support of each arm member.

[0004]

However, if the work arm is configured to be detachable, the attachment / detachment work is complicated and the labor of the operator increases. Also, even if it is a foldable structure, when the folded work arm is located outside the workbench, it is necessary to take care not to interfere with the work or interfere with the electric wire during work. There is a problem that workability becomes poor.

The present invention has been made in view of these problems, and does not increase the burden on the operator.
It is an object of the present invention to provide a working arm that is compact and can be stored easily, and that does not deteriorate workability even during storage.

[0006]

In order to achieve such an object, in the working arm of the present invention, an elevating member is arranged to be movable up and down with respect to an arm supporting member arranged inside a work table. are doing. A horizontal swivel arm is horizontally rotatably attached to the elevating member, and a first oscillating arm that is horizontally swivelable and undulating is attached to an upper surface of the horizontal swivel arm. Further, a second hoisting arm that is horizontally rotatable and hoistable is attached to the upper surface of the first hoisting arm, and a work device attaching arm having a work device attached to its tip is detachably attached to the second hoisting arm. Has become.

In the working arm thus constructed, the horizontal swivel arm can be oriented in a desired direction by raising the elevating member to project the horizontal swivel arm above the workbench. Further, by horizontally swinging and hoisting the first undulating arm and the second undulating arm, the work device can be moved to a desired work position via the work device mounting arm.

After the work is completed, the work device mounting arm is removed from the second undulating arm, and the horizontal oscillating arm, the first undulating arm and the second undulating arm are pivoted respectively so that they are vertically stacked and the first undulating arm is laid. The arm and the second hoisting arm are laid down substantially horizontally, and the elevating member is lowered with respect to the arm supporting member to be in a retracted state. In this stored state, the horizontal swing arm,
The first undulating arm and the second undulating arm are located inside the work table and below the upper end surface of the work table or on the substantially upper surface of the work table. The approximate upper surface of the workbench means a position equal to or slightly protruding from the upper surface of the workbench.

As a result, the work arm in the retracted state does not project from the work table, or even if it projects from the work table, the amount of the work arm is a little. Therefore, when the work arm is not used, the work arm interferes with an electric wire or a utility pole. There is no fear. further,
The horizontal swivel arm, the first undulating arm and the second undulating arm are stored so as to be stacked vertically in a stepwise manner, so that the storage state is compact and the work space in the workbench is not unnecessarily narrowed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, FIG. 5 shows an aerial work vehicle equipped with a work arm according to the present invention.
This will be described with reference to FIG. At the rear of the vehicle body 21 of the aerial work vehicle 20, there is provided a telescopic boom 23 telescopically (nested) composed of a plurality of boom members.
It is attached to a swivel base 22 which can swivel with respect to each other so as to be able to rise and fall freely. At the tip of the boom 23, a vertical state is always maintained by a leveling mechanism (not shown), and the work table 2
4 is horizontally swingable. Work table 24
An operator on board can move to an arbitrary height through the operations of the swivel base 22 and the boom 23.

A work arm 10 is attached to the work table 24. This working arm 10 is shown in FIGS.
As also shown in FIG. 3, an elevating member 11 extending vertically upward from the arm supporting member 17, and a horizontal arm (horizontal rotating arm) 12 that is horizontally rotatable with respect to the elevating member 11 and extends horizontally. An up-and-down arm (first up-and-down arm) 13 which is configured to be horizontally rotatable with respect to the horizontal arm 12 and is also configured to perform up-and-down motion, and is arranged at the tip of the up-and-down arm 13 so as to be vertically swingable. An oscillating balancer 14 provided, an FRP arm (working device mounting arm) 15 configured to be attachable to and detachable from the oscillating balancer 14, and a working device 16 arranged at the tip of the FRP arm 15. It consists of

The elevating member 11 comprises a plurality of rollers 11a which are arranged side by side in the vertical direction, and the arm supporting member 1 which is arranged inside the side surface located in front of the workbench 24.
It is configured to be able to move up and down with respect to 7. The arm support member 17 is provided with an elevating rail 17a, and the roller 1
1a is arranged so that it can be raised and lowered with respect to the elevation rail 17a. The lifting member 11 is lifted and lowered by a hydraulic cylinder (not shown) provided in the mounting base 17 and is held at a desired lifting position. It should be noted that instead of the plurality of rollers 11a, a slider may be used to guide the ascent and descent.

At the upper end of the lifting member 11, the horizontal arm 1
2 is disposed so as to be horizontally rotatable with respect to the elevating member 11. An up-and-down arm support member 13 a is pivotally supported on the upper surface of the tip end of the horizontal arm 12 so as to be horizontally rotatable with respect to the horizontal arm 12. Then, the undulating arm support member 13a
An up-and-down arm 13 is pivotally supported on the up-and-down arm 13.

The hoisting arm 13 is provided with a hoisting balancer such as a hydraulic telescopic cylinder, a gas cylinder or a spring (not shown), and hoisting the hoisting arm 13 against a load acting in the direction of hoisting the hoisting arm 13. Let Thereby, the undulating arm 13 can be held at a desired angle. The holding force of the undulating balancer is configured to be adjustable according to the change in the load acting on the tip of the undulating arm 13.

A swing balancer support member 13b is provided on the upper surface of the tip end of the hoisting arm 13 so as to keep the upper surface 13c in a horizontal state at all times regardless of the hoisting angle of the hoisting arm 13. Here, various configurations are conceivable in order to keep the posture of the swing balancer support member 13b always constant, but as an example, it is conceivable to configure the undulating arm 13 using a parallel link mechanism.

A swing balancer 14 composed of a swing balancer base 14a and an FRP arm holding member (second undulating arm) 14b is attached to the swing balancer support member 13b. The swing balancer base 14a is horizontally swingably attached to the swing balancer support member 13b, and the FRP arm holding member 14b is rotatably supported on the swing balancer base 14a.

The FRP arm holding member 14b is detachably provided with an FRP arm 15 having a working device 16 detachably attached to the tip thereof. The FRP arm 15 has a main body formed in a cylindrical shape, and is attached to the FRP arm holding member 14b by inserting the engagement protrusion 14c into the inner peripheral space of the main body. After that, a fixing screw or the like is used. Firmly held.

The swing balancer 14 thus configured
Is configured to elevate the FRP arm 15 against the load acting in the direction in which the FRP arm 15 is laid down, so that the FRP arm 15 can be held at a desired angle. The holding force of the undulating balancer 14 can be adjusted according to changes in the weight of the FRP arm 15 and the working device 16 arranged at the tip.

Here, various configurations are conceivable as the configuration of the swing balancer 14, similar to the configuration of the undulating balancer, but in this working arm, a plurality of compression springs are connected in series inside the swing balancer 14. It is arranged so that the holding force can be adjusted by changing the spring constant by gradually changing the combination of these springs.

The working device 1 is attached to the tip of the FRP arm 15.
6 are provided. The working device 16 is configured to be attachable to and detachable from the FRP arm 15, and is replaceable according to the work content. The working device 16
Examples thereof include a hand that is capable of freely gripping / opening and swiveling an object, a torque wrench for attaching / detaching a bolt, a cable cutter, and a peeling tool.

Here, the F on which the FRP arm 15 is formed
Since the RP is an insulating material, even if the object with which the work device 16 contacts is in the energized state, the object and the workbench 24 are electrically insulated from each other. It is possible to safely carry out live work without electric shock.

When performing work using the work arm 10 thus constructed, first, the boom 23 is raised and raised.
After the workbench 24 is moved to a high place by performing the extension operation, the operator who has boarded the workbench 24 lifts and lowers the work arm 10 of the work arm 10 shown in FIGS. 1 and 2.
Perform the ascending operation. Then, the horizontal arm 12 is swung to orient the horizontal arm 12 in the working direction, the hoisting arm 13 is swung, and the elevating operation is performed.
The work device 16 is moved to the work position by performing ups and downs (swings) of the RP arm 15.

In the working arm 10, the hoisting / turning operation of each arm is performed manually (manually) by the operator, but the present invention is not limited to this, and the hoisting cylinder or turning can be performed. Ups and downs by a motor etc.
The lifting / lowering member 1 may be configured to perform a turning operation.
The raising / lowering operation of 1 may be manually performed.

Here, since the undulating operation of the balance arm 13 and the swinging operation of the FRP arm 15 are performed in a state in which the weight is balanced by the undulating balancer and the swing balancer 14, when the manual operation is performed, the operator needs to do so. It does not require much labor, and the thrust can be reduced even when using a cylinder or the like. In addition, it is preferable to provide 14 stoppers on the undulating balancer and the oscillating balancer so that the balance arm 13 can be fixed at a desired angle during the undulating operation and the FRP arm 15 oscillating operation.

When the working device 16 is to be replaced, FIG.
As shown in FIG. 4, after the horizontal arm 12 is swung inside the workbench 24, the hoisting arm 13 is laid down at the depression angle and the FRP arm holding member 14b is vertically erected, so that the work carried on the workbench 24 can be performed. Working device 1
Position the FRP arm 15 so that 6 can be reached.

After the work is completed, first, the horizontal arm 12 is swung from the working state shown in FIG. 3 until it becomes parallel to the front surface 24a of the workbench 24, and the hoisting arm 13 is tilted so as to overlap the horizontal arm 12. Perform the turning operation at the same time. Next, after removing the FRP arm 15 from the FRP arm holding member 14b, the FRP arm holding member 14b is laid down so as to overlap the undulating arm 13. Thereby, each arm 12, 13 and the FRP arm holding member 1
4b is folded in parallel with the front surface 24a while alternately stacking in the vertical direction.

Thereafter, while the working arm 10 is maintained in the folded state, the raising / lowering member 11 is moved down so that the arms 12, 13 and the FRP arm holding member are provided in the space above the mounting base 17 in the workbench 24. 14b is stored. It should be noted that the work arm 10 is mounted on the work table 2 in this manner.
4, the upper surface 14c of the FRP arm holding member 14b located at the uppermost part of the working arm 10 in the folded state does not protrude from the upper surface 24b of the workbench, or is substantially aligned with the upper surface 24b. The upper and lower strokes of the lifting member 11 and the space above the mounting base 17 are formed. Thereby, the working arm 10 can be compactly stored in the workbench 24.

[0028]

As described above, according to the working arm of the present invention, the horizontal rotation and the hoisting operation of each arm member enables
The work device can be easily moved to the work position. After the work is completed, the arm for attaching the work device is detached, and then the swing operation and the fall operation of each arm are performed, whereby the arm members are folded so as to be stacked. Further, by lowering the elevating member in this state, it can be compactly stored in the workbench. As a result, the work can be performed safely and efficiently because it does not interfere with the work and there is no need to worry about interference with electric wires, electric poles, etc. located near the work table during the work.

[Brief description of drawings]

1 is a sectional view taken along the line I-I in FIG. 2 showing a retracted state of a working arm according to the present invention.

FIG. 2 is a partial cross-sectional view showing a side surface of the storage state.

FIG. 3 is a side view showing a working state of the working arm according to the present invention.

FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 1, showing a state in which the work arm is replaced with the work device.

FIG. 5 is a side view of an aerial work vehicle including the work arm.

[Explanation of symbols]

 10 Working Arm 11 Elevating Member 12 Horizontal Arm 13 Elevating Arm (First Elevating Arm) 14 Swing Balancer 14b FRP Arm Holding Member (Second Elevating Arm) 15 FRP Arm (Working Device Attachment Arm) 16 Working Device 24 Workbench

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinobu Kakuda, Shinji village, Tone-gun, Tone-gun, Gunma Prefecture 414-1 Higashimine Sugawa, Aichi Corporation (72) Inventor, Tsutomu Kobayashi, Shinne-mura, Tone-gun, Gunma Prefecture, 414 -1 Aichi Corporation Shinjiko Factory

Claims (1)

[Claims] 1. A workbench that is vertically movable with respect to the vehicle body by an elevating device provided on the vehicle body,
A work arm for assisting a work performed by a worker on the work table, the arm support member being provided inside the work table, and the work support arm being vertically movable with respect to the arm support member. Lifted member, a horizontal swing arm mounted on the lift member so as to be horizontally swingable, and a first swingable arm which is horizontally swingable and can be raised and lowered with respect to the horizontal swing arm. An undulating arm, a second undulating arm attached to the upper surface of the first undulating arm so that the undulating arm can be horizontally swiveled and undulated with respect to the first undulating arm; A working device mounting arm detachably attached to the undulating arm, wherein the working device mounting arm is removed from the second undulating arm, and the horizontal swing arm and the first undulating arm are provided. And the second undulating arm are respectively swung to vertically overlap each other, the first undulating arm and the second undulating arm are laid down substantially horizontally, and the elevating member is lowered with respect to the arm supporting member. In the retracted state, the horizontal swing arm, the first undulating arm and the second undulating arm are located inside the work table and below the upper end surface of the work table or on a substantially upper surface of the work table. Working arm characterized by