JPH07257880A - Method and tool for stopping swings of hook block - Google Patents

Abstract

PURPOSE:To provide a method and tool for stopping swings of a hook block of mobile crane, with which the hook block can be fixed safely and certainly by a simple operating procedure. CONSTITUTION:Four wire holes 3 are provided in a damper material in a circular form some greater than the horizontal plane of the upper part of a hook block 1. One of them is made greater in the diameter than the others because a wire fixture is attached there. Using a bolt and nut 6, a chain or a wire 5 are installed while penetrating the center of the buffer material in the left- right direction. A chain fixture 7 is installed on a sheave at the tip of a boom, and the chain or wire 5 is hitched and hung, and a wire rope 8 and the wire fixture are threaded through the wire holes 3. The oversurface of the buffer material is recessed. Another method is such that a hook block swing stopping tool 2 and hook block 1 are fastened. Furthermore, it is acceptable that a spring is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hook block steady rest and a steady rest method for preventing a swing of a hook block and absorbing a shock in a mobile crane.

[0002]

2. Description of the Related Art Conventionally, as a method of fixing a hook block when a mobile crane travels, a hook block is pulled by a wire from a vehicle body and fixed on a loading platform in front of or behind a crane vehicle. It was necessary to climb up and down the loading platform to work. When there is a load, it is impossible to fix it on the loading platform,
I could only fix the front of the car. Recently, there is a hook-in system, but it is expensive and cannot be installed on an old crane vehicle. Sometimes, timber was put in as a simple steadying method. Suspension equipment (Shokai Sho 56-16228
In 1), the hook is designed to prevent a shock when a large pulling force is applied when the load is hung on the hook, and the purpose is different from the steady rest of the hook block. The hook block of a mobile crane (actual Kaihei 3-82389) is expensive and has a drawback that it cannot be attached to old vehicle models.

[0003]

This has the following drawbacks. (1) In order to stop the steady, it is necessary to fix it with a wire from the vehicle body, and for that reason, it is necessary to climb up and down to the loading platform,
It was very troublesome. In addition, a lumber was sandwiched between the boom end sheave and the hook block to prevent the hook block from swaying. At that time, the timber fell off and it was very dangerous. (2) If you only have a driver, you have to do the wire hanging work in front of the loading platform or the vehicle body by yourself.
I was working on a blind while watching the wire tension. For this reason, when the wire is hung in front of the vehicle body, the work from the driver's seat is in a blind spot, so that the frame of the vehicle body is often rolled up and damaged. (3) When the vehicle was stowed forward, an accident could occur due to the wire rope obstructing the view. Since the boom was stretched from the front of the car body, the damage of the accident when hitting a running car was quite serious. (4) When retracted to the rear, hooks and wires could get in the way and hinder loading. When splitting the wire into two parts to prevent the hook block from swaying, it was often overwound. The present invention has been made to eliminate these drawbacks.

[0004]

In order to achieve the above object, the hook block steady rest according to the present invention is a cushioning material having a circular shape which is slightly larger than the upper horizontal surface of the hook block (1). Provide four wire holes (3) in the. Since one of the four wire holes (3) is attached with the wire stopper (4), the hole is larger than the other three holes. It is configured by penetrating the center of the cushioning material to the left and right and attaching a chain or wire (5) using bolts and nuts (6). The chain or wire (5) is hooked and hung on the chain stopper (7) provided on the boom tip sheave, and the wire rope (8) and the wire stopper (4) are passed through the four wire holes (3). Wind up the wire rope (8) until it comes into close contact with the boom end sheave.
The upper surface of the cushioning material can accommodate a boom tip sheave of any shape, and is provided with a recess for improving the stability of the contact surface. It is also possible to fix the hook block steady rest (2) and the hook block (1). In this case,
A flat iron (10) is sandwiched between the hook block (1) and the hook block steady rest (2), and fixed with bolts and nuts (6). A method using a spring (9) is also conceivable. In this case, the upper part and the lower part of the spring (9) are fixed to the flat iron (10) respectively, four wire holes (3) are opened in the flat iron (10), and the wire rope (8) is passed through. Attach the chain or wire (5) attached to the upper flat iron (10) to the chain stopper (7) of the boom tip sheave.
It hangs and is used.

[0005]

The hook block steadying device (2) constructed as described above is hung by hanging the chain or wire (5) on the chain stopping device (7) provided on the boom tip sheave. Wire ropes (8) in four wire holes (3),
Wind the wire rope (8) through the wire stopper (4) until it comes into close contact with the boom tip sheave. As it rolls up, the hook block stop (2) stops under the boom tip sheave. In this state, the hook block steady rest (2) fixes the hook block (1) to prevent runout, and at the same time makes it possible to absorb shock. There is also a method in which a flat iron (10) is sandwiched and fixed between the hook block steady rest (2) and the hook block (1). Also in this case, the wire rope (8) is wound up until it comes in close contact with the sheave at the tip of the boom, whereby the hook block (1) is fixed, and it is possible to prevent shake and absorb shock. Further, there is a method of using a spring (9). In this case, there is an advantage that the degree of winding is visible.

[0006]

EXAMPLES Examples of the present invention will be described below. (A) The wire hole (3) is formed in the buffer material having a circular shape slightly larger than the upper horizontal surface of the hook block (1).
4 places are provided. (B) Since the wire fastener (4) is attached to one wire hole (3), it should be larger than the other holes. (C) The center of the cushioning material is penetrated to the left and right, and the chain or wire (5) is attached using bolts and nuts (6). (D) Install a chain stopper (7) on the boom end sheave. The present invention has the above-mentioned structure, and when this is used, the chain or wire (5) is attached to the chain stopper (7).
The wire rope (8) and the wire stopper (4) are passed through the four wire holes (3). And
Wind up the wire rope (8) until it comes into close contact with the boom end sheave. By doing so, the swing of the hook block is prevented and the shock is absorbed. The cushioning material can be made of various materials, but it is assumed to be made of rubber.
The upper surface of the cushioning material can accommodate a boom tip sheave of any shape, and is provided with a recess for improving the stability of the contact surface. There is also a method of fixing the hook block steady rest (2) and the hook block (1). Furthermore,
There is also a method of using a spring (9). in this case,
Flat iron (10) on top and bottom of spring (9)
Then, the flat iron (10) is provided with four wire holes (3) and the wire rope (8) is passed through. The chain or wire (5) is attached to the upper flat iron (10) using bolts and nuts (6), and hooked and hung on the chain stopper (7) provided on the boom end sheave. This has the advantage that the degree of winding is visible. If the bottom surface of the boom tip sheave is not horizontal, in order to improve stability,
It is recommended to use hook block steady rests with different left and right thickness. The shape of the hook block steady rest is not limited to a circular shape, and other polygonal shapes are also conceivable. Reusing old tires to make hook block steady rests is an excellent way to use resources effectively. Further, the wire hole may be a notch shape.

[0007]

【The invention's effect】

(1) It is not necessary to fix it with a wire when the steady rest is used, and work efficiency is improved because it is not necessary to go up and down to the platform. It is safe because no timber is needed. (2) Even if there is only a driver, one person can work safely. (3) Since there is no need to store it in the front, an accident due to the obstruction of the field of view of the wire rope is eliminated. (4) When retracted to the rear, the hook block can be steady without worrying about the load. (5) The car will not be damaged as it will not be overwound. (6) It is possible to easily hold the hook block steady without involving complicated work. (7) The extent of the damage in the case of a rear-end collision will be considerably lighter than in the case of storing the car in front as before. (8) It can be manufactured at a considerably lower cost than conventional ones.

[Brief description of drawings]

FIG. 1 is a perspective view of a hook block steady rest of the present invention.

FIG. 2 is a perspective view of the hook block steady rest when the wire hole is cut out.

FIG. 3 is a view showing a state in which a hook block steady rest is attached to a position near a boom tip sheave.

FIG. 4 is a view showing a state where the hook block steady rest is fixed to a position above the hook block.

FIG. 5 is a view showing a state where a hook block steady rest using a spring is attached.

FIG. 6 is a view showing a state where the hook block steady rest is wound up to a position in which the hook block steady rest is brought into close contact with the boom end sheave.

FIG. 7 is a sectional view of a hook block steady rest.

FIG. 8 is a side view showing the shape of the hook block steady rest when the surface of the boom tip sheave in contact with the hook block steady rest is oblique.

[Explanation of symbols] 1 hook block 2 hook block steady rest 3 wire hole 4 wire stopper 5 chain or wire 6 bolt / nut 7 chain stopper 8/8 'wire rope 9 spring 10 flat iron

Claims (3)

[Claims] (A) Four wire holes (3) are provided in a buffer material having a circular shape slightly larger than the upper horizontal surface of the hook block (1). Since one of the four wire holes (3) is attached with the wire stopper (4), the hole is larger than the other three holes. The chain or wire (5) is attached using bolts and nuts (6) with the center of the cushioning material penetrating left and right. A chain stopper (7) is provided on the boom end sheave, and a chain or wire (5) is hooked and hung, and a wire rope (8) and a wire stopper (4) are passed through the four wire holes (3). Wind up the wire rope (8) until it comes into close contact with the boom end sheave. A hook block steady rest and a steady rest method, wherein a shock absorbing material is sandwiched between wire ropes (8) of a crane to prevent swing of the hook block and absorb shock. (B) A hook block steady rest characterized in that the upper surface of the cushioning material can accommodate a boom tip sheave of any shape and has a recess for improving the stability of the contact surface. 2. The hook block steady rest (2) and the hook block (1) are fixed to each other.
Hook block steady rest described. 3. An upper part and a lower part of a spring (9) are fixed to a flat iron (10), and four wire holes (3) are opened in the flat iron (10) to pass a wire rope (8). A hook block steady rest characterized by attaching a chain or wire (5) to an upper flat iron (10) using bolts and nuts (6), and hooking and hanging it on a chain stopper (7) provided on a boom end sheave Ingredient