JPH0518394Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is useful for the extended boom and work platform of aerial work vehicles in work such as power distribution line work, insulator replacement work, and signboard installation work at high places. The present invention relates to a rocking prevention device for an aerial work vehicle that accurately prevents rocking and improves safety and work efficiency.

[Prior art] Currently, it is being used in various types of work including, for example, work to prevent salt damage to electric wire insulators, replacement work of insulators, work on distribution lines, work to install billboards and neon signs at high places, and painting work on buildings. As a working machine that is
There are known aerial work vehicles that automate and efficiently perform this work.

Such a high-altitude work vehicle has a workbench provided at the tip of the boom, and a worker rides on the workbench, and the worker operates the work equipment and the like to perform predetermined work. In this way, working with this aerial work vehicle offers benefits such as safety, work efficiency, and shortening of work time compared to the conventional work that involves setting up scaffolding or moving ladders. have By the way, since the workbench is moved to the work surface by rotating, raising and lowering, and extending and contracting the boom using the telescoping boom, it is necessary that the boom be stably held during work. In particular, the higher the location, the greater the need to maintain the boom stably.
However, booms and work platforms extended at high places are prone to swinging due to shifts in the center of gravity due to operations by workers on the work platform, operating conditions of the work equipment mounted on the work platform, strong winds, etc., making it difficult to perform stable work. In addition to this, the swinging of the boom and work platform poses danger to workers and causes unnecessary nerves and fatigue during work. The dot was hot.

[Means and actions for solving problems]

In consideration of the above-mentioned problems, the present invention provides an aerial work vehicle equipped with a movable work platform installed on a boom that is attached to a turntable mounted on a trolley or the like so that the boom can be retracted and retracted. or a first arm whose base end is rotatably attached to the workbench, a second arm whose base end is attached to the tip of the first arm so as to be freely bendable and extensible in a vertical plane, and a second arm that is extendably and retractably attached to the second arm. a third arm fitted into the third arm, and an engagement means that clamps the fixed structure etc. by pressing against the fixed structure etc. provided at the tip of the third arm;
It consists of a release cable that is inserted into each of the arms and pulled to release the clamping of the engagement means, and reliably prevents the swinging of the extended boom and the swinging of the work platform, making it safe. The present invention aims to provide a rocking prevention device for a high-altitude work vehicle that improves work efficiency.

〔Example〕

An embodiment of the present invention will be described below based on FIGS. 1 to 3.

Fig. 1 is a perspective view showing the working condition of an aerial work vehicle to which the present invention is attached, Fig. 2 is an explanatory diagram showing the state in which the present invention is attached to an aerial work vehicle, and Fig. 3 is an enlarged view of the main parts of the present invention. FIG.

In FIG. 1, reference numeral 1 denotes an aerial work vehicle used in the present invention, and this aerial work vehicle 1 is constructed as follows.

That is, in this aerial work vehicle 1, a turntable 2 is rotatably provided on a movable trolley, the base of a telescoping boom 3 is pivotally supported on the turntable 2, and the telescoping boom 3 is connected to the turntable 2 and telescopingly. It is configured to be raised and lowered by an undulation cylinder 4 provided between the booms 3, and to be extended and contracted by a telescoping cylinder 5 built into the telescoping boom 3. In addition, at the tip of the telescopic boom 3, a workbench 6 is moved up and down by a lifting cylinder (not shown), and is balanced by swinging cylinders (not shown) and balance cylinders (not shown) to the left and right. Retained.

Reference numeral 7 denotes a rocking prevention device according to the present invention, which will be described in this embodiment as a device that prevents the boom 3 and the workbench 6 from rocking by clamping the illustrated utility pole D.

The first arm 8 constituting this anti-swing device 7
a, the second arm 8b can be automatically bent via pivot joints 9 at both ends thereof. The anti-swing device 7 has a hole (not shown in the figure) in a bracket 10 protruding from the base end of the first arm 8a on a bracket 6a provided on the side of the workbench 6 so as to be rotatable in a horizontal plane. Fits onto the protruding mounting pin 11,
Fixing the bracket 6a and bracket 10 with the pin 12
The base end of the first arm 8a is rotatably attached to the workbench 6.

Further, a second arm 8b is provided at the tip of the first arm, the base end of which is attached to the second arm 8b so as to be bendable and extensible within a vertical plane,
A third arm 8c is provided by being telescopically fitted into the second arm 8b. And this third arm 8c
There is a horseshoe-shaped chuck 1 that holds the telephone pole D at the tip of the
3 (engaging means) is attached.

By the way, the expansion and contraction of the third arm 8c is similar to that of the second arm 8c.
It can be expanded and contracted by a telescoping cylinder 14 attached to the arm 8b.

The telescopic cylinder 14 can be operated by being connected to, for example, a controller installed on the aerial work vehicle 1 via a cylinder hose 15 shown in the figure.

Further, the chuck 13 is rotatable by having a bifurcated mounting member 13b protruding from the tip of the third arm 8c, and a base end of which is pivoted to both ends of the mounting member 13b via pins 13c, 13c. Both claws 13a,
13a, and both claw portions 13a, 1
Half fan-shaped cam plates 16, 16 having teeth portions 16a, 16a facing each other are attached to the inner side of the base end of 3a. Further, on the mounting member 13b, ratchet claws 17, 17 which elastically contact and engage with the teeth 16a, 16a of the cam plates 16, 16 are attached to the pivot pins 17a, 17.
17a. The engagement of the ratchet claws 17, 17 that have engaged with the teeth 16a, 16a of the cam plates 16, 16 is released by inserting them into the first, second, and third arms 8a, 8b, 8c. By pulling the facing release cable 20 on the workbench 6 side, the joint member 19 and rod 1 attached to the tip of the release cable 20 are removed.
Both the ratchet pawls 17, 17 are rotated through the cam plate 1 through the cam plate 1.
It is released from the teeth 16a, 16a of 6 and 16.
In addition, in the figure, 21, 21 are springs stretched between the cam plates 17, 17 and both claw parts 13a, 13a;
2 and 22 are ratchet pawls 17 and 17 and teeth 16
Spring for pressing a, 16a, 23, 23
is a pad for crimping onto the telephone pole D fixed to the inner surface of the tip of the chuck 13.

Further, in this embodiment, the swing prevention device 7 is attached to the workbench 6, but it may be attached to an appropriate position at the tip of the telescopic boom 3, and a locking device 7 for preventing the workbench 6 from swinging may be installed. The compound is utility pole D in this example.
Of course, the present invention is not limited to this, and may be engaged with various fixation constructs.

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

First, in order to perform predetermined work such as live wire work or insulator replacement work, the aerial work vehicle 1 is placed at a desired position near the utility pole D and fixed with the outriggers 24, and then the vehicle 1 is placed in the position shown in FIG. As shown in FIG. 2, the anti-swing device 7 is attached to the workbench 6 in a folded state. Then, the telescopic boom 3 is raised and extended to the working position by operating the hoisting cylinder 4 and the telescopic cylinder 5, and the work platform 6 is moved up and down and rotated appropriately according to the predetermined work to set the optimal working position. do.

Thereafter, the first and second arms 8a and 8b of the anti-swing device 7 are operated (from the folded state to the unfolded state) in order to engage the anti-swing device 7 according to the present invention at an appropriate position on the utility pole D. , in the illustrated example, the side is bent in a substantially L-shape), and the chuck 1 at the tip of the third arm 8c is fixed.
3. Grasp telephone pole D. That is, the telescopic cylinder 1
4, the third arm 8c is extended toward the utility pole D, and the chuck 13 (both claws 13a, 13a are open as shown in FIG. 3) is pressed against the utility pole D. As a result, the cam plate 16,1
6 rotates against the springs 21, 21, and the chuck 13, that is, both the claws 13a, 13a, are closed to grip the telephone pole D, and at the same time, the cam plate 1
The ratchet pawls 17, 17 engage with the tooth portions 16a, 16a provided on the two pawls 13a, 13.
The closed state of a is maintained. The flyer pawls 17, 17 are elastically engaged with the teeth 16a, 16a of the cam plates 16, 16 by the action of springs 22, 22. Therefore, the chuck 13 is firmly fixed to the utility pole D, and the telescopic boom 3 of the aerial work vehicle 1 connected to the swing prevention device 7 and the work platform 6 are prevented from swinging due to movement of the worker's center of gravity or due to strong winds. Swinging can be reliably prevented, allowing the worker to perform predetermined work with peace of mind, improving work efficiency and shortening work time.

After the predetermined construction work is completed, the rocking prevention device 7 is removed (stored) by the operator pulling the release cable 20.

That is, the ratchet pawls 17, 17 are connected to the spring 2.
2, 22, this ratchet claw 1
7, 17 and the teeth 16a, 16a are disengaged from each other. As a result, the cam plates 16, 16 are rotated by the tension of the springs 21, 21, and the chuck 1 is rotated.
Both claw parts 13a, 13a of 3 are expanded, and the cam plate 1
6 and 16 are restored to their old positions, and chuck 13 is on telephone pole D.
Release the grip. Thus, the telescopic cylinder 14 is operated to retract the third arm 8c and store it in the second arm 8b, and the first and second arms 8a and 8b are folded and attached to the workbench 6 for storage.

[Effect of idea]

As described above, the present invention provides an aerial work vehicle equipped with a movable work platform installed on a boom that is attached to a turntable mounted on a trolley or the like so that it can be raised and retracted. a first arm whose base end is rotatably attached; a second arm whose base end is attached to the distal end of the first arm so as to be bendable and extensible in a vertical plane; and a second arm that is telescopically fitted into the second arm. a third arm, an engagement means provided at the tip of the third arm for clamping the fixed structure etc. by coming into pressure contact with the fixed structure etc., and an engaging means inserted into each arm and pulled by the above-mentioned arms. Since it is constructed with a release cable that releases the grip of the telescopic boom, telescopic cylinder, work platform, etc., it is reliably prevented from swinging, and the worker can concentrate on the specified work such as power distribution line work. It is extremely effective in improving work efficiency and shortening work time, and has excellent effects such as contributing to ensuring worker safety.

[Brief explanation of drawings]

The drawings show an embodiment of the rocking prevention device for an aerial work vehicle according to the present invention, and FIG. 1 is a perspective view showing the working state of the aerial work vehicle equipped with the present invention, and The figure is an explanatory view showing the state in which the present invention is attached to an aerial work vehicle, and FIG. 3 is an enlarged plan view of the main part of the present invention. 1...Aerial work vehicle, 2...Turntable, 3
...Telescopic boom, 4...Luffing cylinder, 5...
Telescopic cylinder, 6... workbench, 6a... bracket, 7... rocking prevention device, 8a... first arm, 8b... second arm, 8c... third arm,
9... Pivot joint, 10... Bracket, 11... Mounting pin, 12... Fixing pin, 13... Chack,
13a, 13a...Claw portion, 13b...Mounting material, 1
3c, 13c... Pin, 14... Telescopic cylinder, 15... Cylinder hose, 16, 16...
...Cam plate, 16a, 16a...Tooth portion, 17, 17
... Ratchet claw, 17a, 17a ... Pivot pin, 18, 18 ... Rod, 19 ... Joint member, 20 ... Release cable, 21, 21, 2
2, 22...Spring, 23...Crimp part,
24...Outrigger, D...Telephone pole.

Claims (1)

[Scope of utility model registration request] In an aerial work vehicle equipped with a movable work platform installed on a boom that is attached to a turntable mounted on a trolley or the like so as to be able to rise and fall, the base end is attached to the boom or the work platform so as to be freely pivotable. a first arm, a second arm whose base end is attached to the distal end of the first arm so as to be bendable and extensible in a vertical plane;
a third arm telescopically inserted into the arm;
an engaging means provided at the tip of the third arm that clamps the fixed construct etc. by coming into pressure contact with the fixed construct etc., and a clamping means released by the engaging means by being inserted into each arm and being pulled. A rocking prevention device for an aerial work vehicle, characterized by comprising a release cable.