JPH08225300A - Insulation covering device for apparatus used for crane operation and work at high elevation - Google Patents

Abstract

PURPOSE: To easily put and remove an insulation covering device when putting and removing a work floor in an apparatus which has the removable work floor for work at high elevation on the top end of a crane boom and is used in common for crane operation and work at high elevation. CONSTITUTION: An insulation covering device 2 covering a top end 82 of a crane boom 8 comprises an insulation cover of a boom side 21 mounted on the top end 82 of the crane boom 8 and an insulation cover of a work floor side 22 mounted on the work floor 15 such that the insulation cover of a work floor side 22 can rotate from a position where it is received in the work floor 15 to a mounting position where it can cover the under side of the insulation cover of a boom side 21 when the work floor 15 is mounted on the crane boom 8. A cover 33 which is baised in a direction abutting on the insulation cover of a boom side 21 at the mounting point is rotatably mounted on the insulation cover of a work floor side 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating cover device having a detachable work floor and used for both crane work and work at high places.

[0002]

2. Description of the Related Art Generally, a crane device is used for crane work such as lifting a load, and an aerial work device is used for aerial work, but it is also possible to use a boom of the crane device for aerial work. If this is done, it is convenient for work, and the equipment cost can be reduced. Therefore, a combined device for crane work and aerial work has been proposed, which is provided with a work floor for aerial work that is detachable at the tip of the crane boom (Japanese Patent Laid-Open No. 5-32).
398).

When performing work near an electric wire using such a device, it is necessary to attach an insulating cover as an insulating measure for preventing electric shock.

[0004]

In the case of a dedicated high-altitude work apparatus, it is not necessary to attach or detach the work floor, so that the insulating cover is not required to be attached or detached. On the other hand, the combined work device for crane work and work at high places has a removable work floor,
It is desirable that the insulating cover can be easily attached and detached when the work floor is attached and detached.

However, the conventional insulating cover is not easy to put on and take off, and there is a possibility that a worker forgets to put on the insulating cover and works. The present invention solves such a problem in a combined device for crane work and work at high altitude. Thus, the present invention is a combined device for crane work and aerial work, which is equipped with a work floor for detachable work at the tip of a crane boom, and can be easily attached and detached when the work floor is attached and detached. It is an object of the present invention to provide an insulating cover device that prevents a worker from forgetting to put on the insulating cover and working.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a combined device for crane work and aerial work provided with a work bed for aerial work which is attachable to and detachable from the tip of the crane boom. The cover device can be rotated from the boom side insulation cover attached to the tip of the crane boom to the attachment position that covers the lower side of the boom side insulation cover from the storage position inside the work floor when the work floor is attached to the crane boom. The above-mentioned problem is solved by constructing the work floor side insulating cover attached to the work floor.

The hoisting angle of the crane boom is changed by pivotally attaching a rotatable lid to the upper part of the work floor side insulating cover, which is biased in the direction of contact with the boom side insulating cover at the mounting position. Be prepared to deal with cases.

[0008]

[Operation] When performing work at height, attach the work floor to the tip of the crane boom, and rotate the work floor side insulation cover from the storage position in the work floor to the attachment position that covers the lower side of the boom side insulation cover. To fix. The tip of the crane boom is covered by the boom side insulation cover and the work floor side insulation cover within the reach of a person riding on the work floor. The person's electric shock is prevented.

Since the work floor side insulating cover is in the storage position in the work floor when it is not rotated to the mounting position, the worker cannot get on the work floor, and therefore he / she forgets to put on the insulating cover before working. There is no fear. When moving the work floor to the work position by hoisting and retracting the crane boom, the tilt of the work floor changes when the crane boom hoists.Therefore, give the work floor an equal angular velocity in the direction opposite to the hoisting of the crane boom. Some of them are provided with a mechanism for holding them horizontally, but this may cause an opening between the boom side insulating cover and the work floor side insulating cover due to the upright state of the crane boom. However, a rotatable lid is pivotally attached to the upper part of the work floor side insulation cover, and if it is urged to abut the boom side insulation cover at the mounting position, the work floor will be lifted as the crane boom rises and falls. Even if the installation angle of the crane to the crane boom changes, there is no opening between the boom side insulation cover and the work floor side insulation cover.

When performing a crane operation, after rotating the work floor side insulating cover from the mounting position to the storage position inside the work floor, if the work floor is removed from the crane boom, only the boom side insulating cover is removed. Once installed, it can be used like a normal crane device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view showing a state of high-side work of a device for both crane work and high-place work provided with an insulating cover device according to an embodiment of the present invention, and FIG. Side view showing the state of crane work of a combined device for crane work and aerial work, FIG.
4 is a front view of the insulating cover device, FIG. 5 is a plan view of the insulating cover device, FIG. 6 is an explanatory view showing a storage position of the work floor side insulating cover, and FIG. 7 is a vertical sectional view of the work floor side insulating cover. 8 is an explanatory view showing a state in which the mounting angle of the work floor with respect to the crane boom is changed.

In this embodiment, a combined device 1 for crane work and work at high places has a column 7 rotatably erected on a traveling carriage (not shown) and a base end portion at the upper end portion of the column 7. It is provided with a crane boom 8 which is pivotally mounted and capable of expanding and contracting, and a work floor 15 which is detachably attached to the tip of the crane boom 8 for work at high places. The work floor 15 is made of a non-conductive material such as FRP.

A speed increaser 11 is provided at the base end 81 of the crane boom 8 and a speed reducer 12 is provided at the front end 82 of the crane boom 8. The speed increaser 11 and the speed reducer 12 extend and contract. The transmission rod 13 is connected. A pivot shaft 16 is pivotally supported by bearings 51 at a lower portion of the tip end portion 82 of the crane boom 8, and seats 52 for attaching and detaching the work floor 15 are fixed to both ends of the pivot shaft 16. In this embodiment, the pivot 16 also serves as the pivot of the pulley 70 for hanging the crane hook. The seat 52 has a prismatic shape and has a pin hole 53 formed in the front surface. The work floor 15 is provided with a crown-shaped mounting seat 56 on the upper part of the frame 55, and a lock pin 57 for inserting into the pin hole 53 of the receiving seat 52 on the lower part thereof. By mounting the mounting seat 56 on the receiving seat 52 and inserting the lock pin 57 into the pin hole 53, the work floor 15 is mounted on the tip portion 82 of the crane boom 8.

A transmission mechanism (not shown) is provided between the speed reducer 12 and the pivot 16 of the seat 52, and the work floor 15 is rotated horizontally at a constant angular velocity in a direction opposite to the ups and downs of the crane boom 8. Can be held. The tip end portion 82 of the crane boom 8 is provided with an insulating cover device 2 that covers it. The insulation cover device 2 includes a boom side insulation cover 21.
And the work floor side insulating cover 22.

On the left and right side surfaces of the upper end of the tip end portion 82 of the crane boom 8, upper brackets 23, which are bent so that their upper portions project laterally, are welded and fixed. A lower bracket 24, which is U-shaped in a plan view and protrudes to the left and right for a predetermined length, is welded and fixed to the rear side of the lower portion of the tip end portion 82 of the crane boom 8 slightly above the pivot shaft 16. Vertical brackets 25 are welded and fixed to both side ends of 24. The boom-side insulating cover 21 is a cover made of a non-conductive material such as FRP formed so as to cover the front surface, the left and right side surfaces, and the upper surface of the tip end portion 82 of the crane boom 8, and the upper bracket 23 and the vertical bracket 25. Are fixed with bolts 26 and nuts 27, respectively.

The work floor side insulating cover 22 is a cover made of a non-conductive material such as FRP formed below the boom side insulating cover 21 so as to cover the front surface and the left and right side surfaces of the tip portion 82 of the crane boom 8. And the front surface thereof extends downward to form a mounting portion 28 to the work floor 15. A rod 29 is horizontally mounted on the rear surface of the lower end portion of the mounting portion 28, and the rod 29 is rotatable in a hollow member 30 fixed to the inner surface of the rear surface of the work floor 15 and vertically predetermined. It is inserted so that it can move freely.

A hook member 31 is fixed above the hollow member 30 on the inside of the rear surface of the work floor 15, and a vertical slot 32 for engaging with the hook member 31 is provided in the mounting portion 28. There is. A lid 33 is rotatably attached to an upper part of the work floor side insulating cover 22 by a mounting pin 34. The lid 33 is provided with a spring 3 provided around the mounting pin 34.
5, the work floor side insulating cover 22 is urged in a direction in which it is brought into contact with the front surface of the boom side insulating cover 21 at the position where the work floor side insulating cover 22 is attached to the crane boom 8. Working floor side insulation cover 22
With the crane removed from the crane boom 8, the lid 3
3 is a stopper 3 provided on the side surface of the work floor side insulating cover 22
It rotates to the position where it abuts 6.

When working at a high place, the work floor 15 is attached to the tip 82 of the crane boom 8, and the work floor side insulating cover 22 is lifted from the storage position in the work floor 15 shown in FIG. The attachment of the insulating cover 2 is easily completed by rotating the boom side insulating cover 21 to a mounting position that covers the lower side and engaging the elongated hole 32 with the hook member 31. The tip end portion 82 of the crane boom 8 is covered by the boom-side insulating cover 21 and the work-floor-side insulating cover 22 within the reach of a person who rides on the work floor 15.
Even if the user accidentally contacts the electric wire, the electric shock of the worker is prevented.

Since the work floor side insulating cover 22 is in the storage position in the work floor 15 when it is not rotated to the mounting position,
The worker cannot get on the work floor 15, and therefore there is no risk of forgetting to attach the insulating cover 2 to work. When the work floor 15 is moved to the work position by hoisting and retracting the crane boom 8, when the crane boom 8 hoists, the work floor 15 is rotated at a constant angular velocity in the opposite direction of the hoisting of the crane boom 8 to maintain the horizontal position. can do. At this time, the mounting angle of the work floor 15 with respect to the crane boom 8 changes with the ups and downs of the crane boom 8. However, the upper cover 33 of the work floor insulating cover 22 is always attached to the boom side insulating cover 21. Since it is biased, no opening is formed between the boom side insulating cover 21 and the work floor side insulating cover 22.

When carrying out a crane operation, the work floor side insulating cover 22 is lifted to release the engagement between the elongated hole 32 and the hook member 31, and after rotating from the attachment position to the storage position in the work floor 15. When the work floor 15 is removed from the crane boom 8, only the boom side insulating cover 21 as shown in FIG. 2 is attached, so that it can be used in the same manner as a normal crane device.

[0021]

As described above, the insulating cover device for combined use of crane work and aerial work according to the present invention is easily attached and detached when the work floor is attached and detached, and the worker attaches the insulating cover. There is no risk of forgetting to work, and you can safely work in high places. Further, there is an effect that the insulating cover does not get in the way when the crane work is performed.

[Brief description of drawings]

FIG. 1 is a side view showing a state of an aerial work of a device for both crane work and aerial work provided with an insulating cover device according to an embodiment of the present invention.

FIG. 2 is a side view showing a state of crane work of a device for both crane work provided with an insulating cover device and work at high places.

FIG. 3 is a side view of an insulating cover device.

FIG. 4 is a front view of an insulating cover device.

FIG. 5 is a plan view of an insulating cover device.

FIG. 6 is an explanatory view showing a storage position of a work floor side insulating cover.

FIG. 7 is a vertical cross-sectional view of a work floor side insulating cover.

FIG. 8 is an explanatory diagram showing a state in which the mounting angle of the work floor with respect to the crane boom has changed.

[Explanation of symbols]

 1 Combined device for crane work and work at high places 2 Insulation cover 7 Column 8 Crane boom 11 Speed increaser 12 Speed reducer 13 Telescopic transmission rod 15 Work floor 16 Axis 21 Boom side insulation cover 22 Work floor side insulation cover 23 Upper bracket 24 Bottom Bracket 25 Vertical bracket 28 Mounting part 29 Rod 30 Hollow member 31 Hook member 32 Long hole 33 Lid 52 Receiving seat 56 Mounting seat 57 Lock pin

Claims (2)

[Claims] 1. A combined device for crane work and aerial work, comprising an attachable / detachable work floor at the tip of the crane boom, which is an insulating cover device for covering the tip part of the crane boom. The boom side insulation cover attached to the tip of the workbed and the work floor when it is attached to the crane boom are rotatably attached to the work floor from the storage position inside the work floor to the mounting position that covers the lower side of the boom side insulation cover. Insulation cover device for combined use of crane work and work at high places, which consists of a work floor side insulation cover. 2. The crane according to claim 1, wherein a rotatable lid that is urged in a direction in which it abuts against the boom side insulating cover is pivotally attached to an upper portion of the work floor side insulating cover. Insulation cover device for combined use of work and work at height.