JPH06345385A - Insulating device for crane - Google Patents

Abstract

PURPOSE:To secure insulation and further to freely change a direction of a hoisted object. CONSTITUTION:A device comprises a stopper 1 stoppable to a hook D provided in a hoist wire C of a crane A, mounting device 2 for mounting a hoist hook F of a hoisted object E and an insulator 3 for insulating between the stopper 1 and the mounting device 2, to respectively connect the stopper l to an upper end part and the mounting device 2 to a lower end part, of the insulator 3, and also at least one of the stopper 1 and the mounting device 2 is rotatably mounted relating to the insulator 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating device which is attached to a hoisting wire of a crane and prevents an electric shock accident of an operator who is hanging a suspended object via the wire. .

[0002]

2. Description of the Related Art Generally, when hoisting a crane under a high-voltage electric wire, the boom of the crane accidentally touches the high-voltage electric wire, so that an operator who is performing a ball mounting operation receives an electric shock.

Therefore, in the past, for example, Japanese Patent Publication No. 52-22
No. 182, a columnar insulator, an annular first wire inserted through a through hole formed in the insulator, and an annular wire wound around a groove formed on the outer periphery of the insulator. And a hook attached to a hoisting wire of a crane is locked to the first wire, and a hanging wire hung around a hoisting object is connected to the second wire. By doing so, the hoisting wire can be hoisted while the hoisting wire and the hoisting wire are insulated by the insulating device, and even if the boom accidentally touches the high voltage wire, I try to prevent the staff from getting an electric shock.

[0004]

By the way, in the above insulating device, the second wire and the first wire intersect with each other with the insulator interposed therebetween, and the second wire is the outer periphery of the insulator. Since it is only hung over the groove formed in the above, there is a possibility that this second wire comes out of the groove and comes into contact with the first wire, and insulation becomes impossible. When hoisting an object to be lifted, there is also a problem that the direction of the object to be hoisted cannot be freely changed.

The present invention has been developed in view of the above circumstances, and it is an object of the present invention to provide an insulating device for a hoisting machine which can surely insulate and can freely change the direction of a hoisted object. To provide.

[0006]

DISCLOSURE OF THE INVENTION The present invention, therefore, is an attachment body for attaching a locking body 1 which can be hooked to a hook D provided on a hoisting wire C of a crane A and a hooking member F of an object to be lifted E. 2 and an insulator 3 that insulates between the locking body 1 and the mounting body 2. The locking body 1 is provided at one end in the lengthwise direction of the insulating body 3, and the insulating body 3 is provided at the other end in the lengthwise direction. The attachment bodies 2 are connected to each other, and at least one of the locking body 1 and the attachment body 2 is rotatably attached to the insulator 3.

The insulator 3 is preferably made of porcelain, and when the insulator 3 is made of porcelain, the insulator 3
It is preferable to coat the outer surface of the insulator 3 with a cushioning material 7 so that the insulator 3 is not damaged when hit by the object.

[0008]

According to the present invention, the locking body 1 for locking the hook D of the hoisting wire C is attached to one end of the insulator 3 in the lengthwise direction, and the hanging object E is hooked to the other end in the lengthwise direction. Stop member F
Since the mounting body 2 for mounting the mounting body 2 is mounted and the locking body 1 and the mounting body 2 are at different positions with the insulating body 3 interposed therebetween, during the lifting work of the object E to be lifted by the crane A, Since the locking body 1 and the mounting body 2 do not come into contact with each other, and at least one of the locking body 1 and the mounting body 2 is rotatable with respect to the insulator 3, the hoisting of the crane A is performed. The direction of the attachment body 2 with respect to the wire C, in other words, the direction of the object to be lifted E can be freely changed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An insulating device S shown in the drawing is used by being connected to a hook D of a hoisting wire C extending from a boom B of a crane A, as schematically shown in FIG.
Basically, a locking body 1 that can be locked to the hook D of the hoisting wire C, a mounting body 2 to which the hooking member F of the object E to be lifted is mounted, and the locking body 1 and the mounting body 2. And an insulator 3 that insulates between the two.

The engaging body 1 has a pair of facing pieces 11 facing each other at the upper end thereof, and a bolt 12 is inserted and held between the facing pieces 11, and an annular wire 13 is attached to the bolt 12.
On the other hand, a bulge portion 14 that bulges radially outward is integrally formed on the lower end portion of the locking body 1 while straddling.

The mounting body 2 is formed with a pair of facing pieces 21 facing each other at the lower end thereof, and a bolt 22 is inserted and held between the facing pieces 21, and an annular wire 23 is attached to the bolt 22.
On the other hand, a hanging hook F for hanging the object E to be lifted is attached to the wire 23. Further, a fitting groove 24 into which a connecting flange 61 of a connecting rod 6 described later is rotatably fitted, and an insertion port 25 into which the connecting flange 61 is inserted into the fitting groove 24 are provided at an upper end portion of the mounting body 2.
An insertion opening 26 for inserting the connecting rod 6 upward from the fitting groove 24 and a pin hole 27 opening at the bottom of the fitting groove 24 are provided.

On the other hand, the insulator 3 is made of a porcelain insulator 4 comprising a substantially cylindrical body portion 41 having an upper end opening closed and a collar portion 42 extending radially outward from the outer periphery of the lower end portion of the body portion 41.
And a cap 5 made of casting to be attached to the body portion 41 of the insulator 4.
And a connecting rod 6 made of casting which is assembled in the body portion 41, and the cap 5 is attached to the insulator 4
While being fitted and fixed to the outer periphery of the body portion 41 of the connecting rod 6 through the cement 50, the upper end side of the connecting rod 6 is fixed in the body portion 41 through the cement 60, and the lower end side of the connecting rod 6 is formed into the insulator. 4 is projected below. A connecting flange 61 is formed integrally with the lower end of the connecting rod 6 to rotatably connect the mounting body 2. Further, a connecting portion 51 that rotatably connects the locking body 1 is provided on the upper portion of the cap 5, and the connecting portion 51 is a bulge formed integrally with the lower end portion of the detection body 1. A fitting groove 52 into which the portion 14 is rotatably fitted, an insertion opening 53 into which the bulged portion 14 is inserted into the fitting groove 52, and the locking body 1 is inserted upward from the fitting groove 52. It includes an insertion port 54 and a pin hole 55 that opens at the bottom of the fitting groove 52.

Further, in the embodiment shown in the drawings, the outer peripheral surface of the collar portion 42 of the insulator 4 is covered with a cushioning material 7 made of silicon rubber, while the insulator 3 has a withstand voltage characteristic of 44.5 kV and 700 A. It has withstand current characteristics.

In order to assemble the locking body 1 to the insulating body 3, the bulging portion 14 is inserted into the fitting groove 52 through the insertion opening 53 of the cap 5, and the engagement is performed. The lower end side of the stopper body 1 is passed through the insertion port 54, and then the locking body 1 is lifted with respect to the cap 5 so that the bulging portion 14 is brought into contact with the upper surface of the fitting groove 52. At the same time, the split pin 56 is inserted into the pin hole 55, and the split pin 56 receives the lower surface of the bulging portion 14 to prevent the bulging portion 14 from coming off the fitting groove 52. The locking body 1 is rotatably connected to the cap 5.

Assembling of the attachment body 2 to the insulator 3 is performed by inserting the connection flange 61 of the connection rod 6 into the fitting groove 24 of the attachment body 2 through the insertion port 25. The rod 6 is inserted into the insertion opening 26, the connecting flange 61 is brought into contact with the upper surface of the fitting groove 24, and the split pin 28 is inserted into the pin hole 27 so that the connecting flange 61 is fitted. The attachment body 2 is rotatably connected to the connection rod 6 by preventing the attachment body 2 from coming off from the groove 24.

The above insulating device S is designed to withstand a tensile load of about 30 tons.

In the figure, G indicates a steel tower of the transmission line.

In the insulating device S having the above structure, as schematically shown in FIG. 4, the wire 13 attached to the locking body 1 is hooked on the hook D of the hoisting wire C, while the attachment body 2 is attached. The object to be lifted E is hooked on the lifting hook F provided on the wire 23 for use.

By the way, when the object to be lifted E is hooked on the lifting hook F, the locking body 1 to the mounting body 2 are freely rotatable with respect to the insulator 3.
Since the direction of the lifting hook F can be freely changed, the work of hooking the object E to be lifted on the lifting hook F can be smoothly performed, and the locking body is provided on the upper end side of the insulator 3. 1 is attached, the attachment body 2 is attached to the lower end side of the insulator 3, and the locking body 1 and the attachment body 2 are located apart from each other with the insulator 3 interposed therebetween. During the lifting operation of the object E to be lifted by A, the locking body 1 and the mounting body 2 do not come into inadvertent contact with each other.

Further, in the above embodiment, since the outer peripheral surface of the collar portion 42 is covered with the cushioning material 7, even when the collar portion 42 hits an object during the lifting operation of the object E to be lifted,
The insulator 4 is less likely to be inadvertently damaged.

In the above embodiments, the locking body 1 and the mounting body 2 are rotatably connected to the insulator 3, but only one of them is rotatably connected to the insulator 3. You may do it.

[0022]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the locking body 1 that can be locked to the hook D provided on the hoisting wire C of the crane A is provided.
And the mounting body 2 for mounting the hooking member F for the object to be lifted E
And an insulator 3 for insulating between the locking body 1 and the mounting body 2.
The locking body 1 is connected to one end of the insulator 3 in the lengthwise direction, and the mounting body 2 is connected to the other end of the lengthwise direction, and at least one of the locking body 1 and the mounting body 2 is connected. Rotatably attached to the insulator 3, the locking body 1 and the attachment body 2 are located at different positions with the insulator 3 interposed therebetween. The locking body 1 and the mounting body 2 do not come into contact with each other during the lifting work of the above, and further, the locking body 1 or the mounting body 2 is rotated freely with respect to the insulating body 3 by the rotation operation of the locking body 1 or the mounting body 2. The direction of the stop member F can be freely changed, and the work of hooking the hanging object E to the hook member F can be smoothly performed.

Further, according to the present invention, by forming the insulator 3 from a porcelain and covering the outer surface of the insulator 3 with the cushioning material 7, the insulation performance can be improved,
Even if the insulator 3 collides with an object during the lifting operation of the object to be lifted E, damage to the insulator 3 can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of an insulating device for a crane.

FIG. 2 is a partially cutaway front view showing an enlarged main part of an insulating device for a crane.

FIG. 3 is a sectional view taken along line XX in FIG.

FIG. 4 is a schematic explanatory view showing a usage state of the crane insulating device.

[Explanation of symbols]

 1 Locking body 2 Mounting body 3 Insulator 7 Cushioning material A Crane C Hoisting wire E Lifting object F Lifting hook (Hooking member)

Claims (2)

[Claims] 1. A hoisting wire (C) for a crane (A).
(1) An insulating device to be mounted on a hook, which can be locked to a hook (D) provided on the winding wire (C).
And an attachment body (2) for attaching the hooking member (F) of the object to be lifted (E), and an insulator (3) for insulating between the locking body (1) and the attachment body (2). Consists of the insulator (3)
The locking body (1) is connected to one end in the lengthwise direction of the locking body (1) and the mounting body (2) is connected to the other end in the lengthwise direction of the locking body (1) and at least one of the mounting body (2). Is rotatably attached to the insulator (3), the insulating device for a crane. 2. The crane insulation device according to claim 1, wherein the insulator (3) is made of porcelain, and the outer surface of the insulator (3) is covered with a cushioning material (7).