JPS6026057Y2 - Wire rope loosening jig - Google Patents

Description

[Detailed description of the invention] The present invention relates to a wire rope slack prevention jig, more specifically, a wire rope slack prevention jig used for lifting or hanging relatively light scaffolding boards, steel plates, etc. This relates to a stopper jig.

Generally, when lifting a relatively light weight object such as a scaffolding board, a wire rope is wrapped around the object to be lifted such as a scaffolding board, and then a simple fastening jig is attached to one end of the wire rope. is hung in the middle of the wire rope so that the wire rope surrounds the object to be lifted into a triangular shape, and tension is applied to the wire rope to tighten the object and lift it.

In this state, when lifting a hoisted object manually or using a crane or the like and moving it to a predetermined transport position, the tightening jig and the wire rope are simply in contact with each other, so the hoisted object is When the wire rope comes into contact with surrounding fixed objects and a shock is applied to the object being lifted, the tightening of the wire rope begins to loosen.

When such a phenomenon occurs, there is a danger that the suspended object may come off the wire rope and fall, causing harm to the human body.

Therefore, in the past, various jigs have been proposed to prevent the wire rope from becoming loose.

An example is shown in FIG.

In FIG. 1, the reference numeral 1 indicates a wire rope, and one end 1a of the wire rope is connected to one end of a simple fastening jig 8.

After the wire rope 1 is wound around a suspended object (not shown in FIG. 1), the fastening jig 8 is hooked onto the upper side of the suspended object in the middle of the wire rope 1.

On the other hand, the reference numeral 3 indicates a locking jig, and the locking jig 3 consists of a pair of left and right gripping pieces 3a and 3b, both of which are rotatably supported by a shaft 4.

A torsion coil spring 5 is wound around the shaft 4, and a closing force is applied to the tip side of each clamping piece 3at3b, that is, the side of the fastening jig 8.

This locking jig 3 is installed in advance at an arbitrary position in the middle of the wire rope 1 as shown in the figure.
Wrap the wire rope 1 around the object to be lifted, hook the wire rope 1 onto the tightening jig 8 to tighten the wire rope 1, grasp the clamping piece 3at3b and move it while loosening the tip side, as shown in FIG. Tightening jig 8 hooked on
Place the tip against the side of the

An anti-slip member 3c is provided inside the tips of the clamping pieces 3a and 3b of this anti-loosening jig 3 to clamp the wire rope 1 from both sides and prevent the wire rope 1 from slipping. It has been devised to prevent positional deviations from occurring in this state.

However, the anti-slip member 3c of the jig 3 having such a structure
In this case, not only because the contact area with the wire rope 1 cannot be made large, but also because the wire rope 1 is clamped by the force of the spring 5, which has a relatively small spring constant, there is a problem in the process of lifting and moving the lifted object. If an impact is applied to the suspended object, the wire rope 1 will become unfastened and will no longer function as a loosening jig.

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional wire rope loosening jig, which has an extremely simple structure and is configured to prevent the wire rope from loosening. is intended to provide.

In the present invention, in order to achieve the above-mentioned purpose, as a wire rope loosening jig, a through hole for the wire rope having an inner diameter slightly larger than the outer dimension of the wire rope is formed, and A structure is adopted in which the axial direction of the through hole is bent into a serpentine shape.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

FIG. 2 and subsequent figures illustrate one embodiment of the present invention, and in each figure, the same parts as in FIG. 1 are given the same reference numerals, and their explanation will be omitted.

FIGS. 2 to 4 show a locking jig according to the present invention. In this embodiment, the locking jig 6 is formed of a metal pipe, and has a flange portion 6a on one end thereof. It is provided.

As shown in FIG. 2, this locking jig 6 is bent in a serpentine shape, and the axis of the through hole 6b formed in the center of the jig 6 is also bent in a serpentine shape, similar to the shape of the vibrator. .

The inner diameter of the through hole 6b is slightly larger than the outer diameter of the wire rope 1, and is formed to have a size such that the wire rope 1 can be inserted almost freely.

On the other hand, the reference numeral 8 denotes a fastening jig, and as shown in detail in FIG. It has a locking piece 10 which is freely supported on the shaft.

The locking piece 10 has the tip of a torsion coil spring 11 shown by a broken line wound around the shaft 9 locked, so that the locking piece 10 always has the habit of rotating in the open direction.

The tip of the locking piece 10 contacts the inside of the bent portion 8b at the tip of the hook-shaped main body 8a, and its rotation is restricted.

Therefore, in order to hook the wire rope 1, if the locking piece 10 is pressed against the free end of the wire rope 1 midway, the locking piece 10 resists the force of the torsion coil spring 11 and the fifth
In the figure, the wire rope 1 is rotated counterclockwise at the bent portion 8.
It will not slip unless you push the locking piece 10 open with your fingertips.

On the other hand, the locking jig 6 is fitted onto the wire rope 1 with its flange portion 6a facing the fastening jig 8.

When the anti-loosening jig 6 is attached to the wire rope 1, the through hole 6b of the jig 6 is meandering, so that it hardly shifts due to the frictional force between the relatively rigid outer peripheral surface of the wire rope 1 and the through hole 6b. in a state.

However, when the wire rope 1 is set against the loosening jig 6,
If the wire rope 1 is pulled lightly by hand, it can be deformed along the curved through hole 6b, so that the locking jig 6 can be freely moved forward and backward.

However, when a relatively large tensile load is applied to the wire rope 1 and it becomes straightened, the distance between it and the inner peripheral surface of the through hole 6b,
In particular, in FIG. 7, the bent portions A and B of the locking jig 6 are
At this point, the loosening jig 6 cannot move relative to the wire rope 1 because a larger frictional force acts.

Next, a method of using the locking jig according to the present invention constructed as above will be explained.

As shown in FIGS. 6 and 7, the wire rope 1 is wound around the object 12, and the fastening jig 8 is attached to the wire rope 1.
Hook it in the middle and tighten wire rope 1.

In this state, the loosening jig 6 is lowered along the wire rope 1 and the bottom surface of the flange portion 6a is pressed against the fastening jig 8.

In this state, as shown in FIG. 6, when the wire rope 1 is attached to a crane or the like and the lifted object 12 is lifted, the wire rope 1 becomes straight due to the load of the lifted object 12.

Then, as mentioned above, between the wire rope 1 and the inner circumferential surface of the bent through hole 6a, especially A and B in FIG.
A large frictional force acts at the point, and even if the fastening jig 8 tries to slip, the loosening jig 6 prevents this.

Therefore, even if the object 12 hits a surrounding fixed object and an impact load is applied to the object 12 during lifting, the wire rope 1 will not loosen.

In this way, it is possible to prevent the wire rope from loosening using the loosening prevention jig 6 having an extremely simple structure.

By the way, in the above-mentioned embodiment, an example was shown in which the locking jig 6 was formed of a metal pipe, but what is necessary is to curve the through hole, and if the through hole is curved, the pipe will fit. Of course, it may be formed as a block instead of a shape.

Furthermore, in the embodiment described above, the through hole has a gentle S.
The wire rope is bent into a letter shape, but if the wire rope is bent into a more complicated serpentine shape or into a zigzag shape, the frictional force between the wire rope and the through hole will further increase, making it difficult to tighten the wire rope. The loosening prevention effect can be further improved.

As is clear from the above description, according to the present invention, a wire rope loosening device is formed by forming a through hole with an inner diameter slightly larger than the outer diameter of the wire rope, and bending this through hole into a serpentine shape. The device is used in contact with the wire rope tightening jig, which has an extremely simple structure and has the excellent effect of reliably preventing the wire rope from loosening. There is.

[Brief explanation of the drawing]

Figure 1 is a front view illustrating the structure of a conventional locking jig.
Figures 2 to 7 illustrate an embodiment of the present invention.
Fig. 2 is a front view, Fig. 3 is a right side view of Fig. 2, Fig. 4 is a bottom view of Fig. 3, Fig. 5 is a plan view of the fastening jig, and Fig. 6 is a hanging object. Above is a perspective view showing the procedure, Figure 7 is the 6th
It is an enlarged front view taken along the c-c line in the figure. 1... Wire rope, 6... Wire rope loosening jig, 6a... Flange part,
6b...Through hole, 8...Tightening jig, 1
2...The hanging is a thing.

Claims (1)

[Scope of utility model registration request] A wire rope loosening jig, which is formed by forming a through hole with an inner diameter slightly larger than the outer diameter of the wire rope and bending the axis of this through hole in a serpentine shape, is passed through the through hole. The device is attached to a wire rope, the wire rope is wound around the object being lifted, the wire rope is tightened using a wire rope tightening jig, and one end of the loosening jig is brought into contact with this tightening jig. This wire rope loosening jig is capable of preventing loosening of the tightening of the wire rope by lifting the object.