JP3104667U - Rope detachable hook with untwist - Google Patents

Abstract

PROBLEM TO BE SOLVED: Since a use environment of a safety belt is almost at a work site, a rope portion is easily contaminated with oil, mud, paint and the like. In addition, there is a situation in which the strength is always deteriorated due to damage due to the falling of a welding spark or contact with a sharp iron member. In addition, when a three-strand rope is used as a cause of deterioration in the strength of other ropes, kink may occur, and the rope portion is replaced. However, such replacement involves a large economic burden such as transportation cost. Was. Therefore, a solution to the problem of replacing the safety belt rope portion and a problem of preventing kink of the rope have been demanded.
SOLUTION: One end of a rope 1 is formed in a loop shape 11, a small-diameter loop portion 12 is formed in the other end after a predetermined length, and provided at a base end portion by a connecting member 3 inserted through the loop portion 12. A hook that can be detachably attached to the end of the rotating member 5 is employed.
[Selection diagram] Fig. 1

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety belt for fall prevention used when working at heights, and more particularly to a hook for a fall prevention rope connecting between a belt wound around a waist and a building.

In general, a rope or a narrow woven belt is used between the belt portion of the fall prevention safety belt and the hook for hooking the structure.
In the case of a rope, one end is connected to a substantially D-shaped ring provided on a belt portion, and the other end is connected to a hook having a hook portion for hooking a structure. When using a narrow woven belt, the take-up device is fixed on the belt part, and a hook is sewn to the end of the narrow woven belt wound up and stored in the take-up device, allowing the belt length to be stretchable. Was to do. In any of the methods, the rope portion made of the rope or the narrow woven belt is fixedly connected to the belt portion, and therefore, the problem remains.

When using a safety belt, the use environment is almost always a work site, and therefore, it is easily contaminated with oil, mud, paint and the like. Particularly, the tendency of the rope portion connecting the belt and the hook is stronger than that of the belt portion constantly wound around the waist.
Further, in addition to being soiled, there is a high possibility that the most important function of the safety belt, that is, the function of supporting the load in the event of a crash, is impaired.
The hook is connected and hooked to the structure, but it comes into contact with the structure immediately after painting, the spark of welding comes down, and it contacts with sharp iron members, so the rope part of the safety belt in use is There is always a situation where strength is deteriorated due to damage.

Therefore, in order to prevent the strength of the rope part, which is also the lifeline of the safety belt, from deteriorating, attempts have been made to attach a cover to the rope part, increase the rope diameter of the rope part, or increase the width of the narrow belt. However, it did not lead to full-scale adoption due to reduced usability.
As a countermeasure against the decrease in strength, damage and fouling of the rope portion as described above, at present, there is a feeling that the method in which only the rope portion is replaced with a new one is calm.
Replacing the rope with a new one involves an economic burden, but is often used because it is cheaper than replacing the safety belt itself.

However, the cause of the strength deterioration of the rope was not only such, but also the twist of the rope was often observed.
This is a phenomenon that occurs when a three-strand rope is employed, but the kink may cause the rope to untwist. A rope manufactured in a state in which the three-strand rope is weakly twisted is processed as a rope portion of a safety belt, and in the repeated hanging action during use, sudden twist return, so-called kink may occur. . As mentioned above, the belt and the rope of the safety belt are fixedly connected, and the hook at the end of the rope is also fixedly connected. Should be performed with the rotation of, but if performed with the rotation in the reverse direction of twisting, kink will occur. When a fall load is applied to the kink-forming rope portion, the rope breaks with a considerably lower load than normal. This is the kink position, where the nylon fiber mainly used for the rope is in a solidified state, and the high elongation characteristic of nylon cannot be obtained, so the load is concentrated at this position and rope cutting occurs Things.
As described above, there has been a need to solve the problem of replacing the rope portion of the safety belt and the problem of preventing the return of the twist of the rope.
JP-A-62-36750 Japanese Utility Model Publication No. 2-65944

  This safety belt is used to prevent crashes when working at high altitudes.However, as it is used repeatedly, it solves the problem of strength degradation that occurs only in the rope and the problem of kink that occurs in the rope. .

In the present application, the problem is solved by a hook provided with a detachable structure of the rope portion and a untwisted structure.
The hook of the present application has a small diameter in which one is formed in a ring shape so as to be connected to the ring of the safety belt belt portion, and the other is provided with a thimble which can be connected to the rotating member of the untwisted structure provided at the base end portion of the hook by the connecting member. The problem is solved by combining a special replacement rope with the limb.

By adopting the above-mentioned rope with detachable and untwisted hooks of the present configuration, if the strength of the rope portion of the safety belt deteriorates, it can be replaced promptly, and at the same time, the kink generated in the rope portion is prevented. Is what you can do.
Replacement of the damaged rope by adopting the rope with the detachable hook of the present application can be done in a short time by the worker himself by cutting and abandoning the rope part of the safety belt in use and replacing it instead. Therefore, there is no need to return to the manufacturer and hesitate to repair / replace the product while worrying about the reduction in strength. This also has an economic effect that the transportation cost can be reduced. What is more important is that the ropes can be replaced properly, thus preventing a crash.

To describe the embodiment of the present application in detail,
In the present application, as shown in the figure, one end of the rope 1 is formed in a loop shape 11, a small-diameter loop portion 12 is formed at the other end after a predetermined length, and a bolt of the connecting member 3 inserted into the loop portion 12 is used. The hook 2 can be detachably attached to the end of the rotating member 5 provided at the base end of the hook 2.

  As shown in FIG. 2, the replacement rope corresponding to the hook with a detachable and untwisted rope according to the present invention is obtained by fitting a thimble 13 to the loop 12 of the rope 1 and performing a treatment for preventing abrasion. .

  As shown in FIGS. 3 and 4, the rotating member 5 of the present application is formed by piercing a Y-shaped bolt 6 attached to the base end of the large-diameter hook 2 and a bottom piece of the U-shaped metal fitting 7 to the Y-shaped bolt 6. The nuts 61 are fitted together to prevent the nuts from coming off.

As described above, the replacement of the replacement rope to the hook with the detachable rope of the present invention is performed by disposing the connecting member 3 on the U-shaped metal fitting 7 via the collar 4 on the loop portion 12 of the rope 1 as described above. Since the bolts are simply inserted through the collar 4, tightened, and the nuts 31 are screwed together, they can be easily attached.
Since the loop 12 at the end of the rope 1 is equivalent to the end of the rope which is attached to a normal hook, it is small and does not become bulky.

FIG. 5 shows an example of a safety belt to which the hook with a detachable and untwisted rope of the present invention is attached. A loop 11 of the rope 1 is inserted into a ring 9 provided through a trunk belt 8, and a hook is attached to the loop 11. 2 can be easily mounted. Further, the hook 2 side can be easily attached by the bolt of the connecting member 3 as described above.
Therefore, if the rope is damaged, the operator can replace it by purchasing a replacement rope next time.

FIG. 1 is a front view of a rope to which a hook with a detachable twist return cable of the present application is attached. The front view of the replacement rope attached to the hook of the present application. The perspective view of the main part of the hook of this application. FIG. 4 is a perspective view of a replacement state of a replacement rope with a hook of the present application. The front view which shows an example of the safety belt to which this application hook was attached.

Explanation of reference numerals

1 rope
11 annular
12 limbs
13 thimble 2 hook 3 connecting member
31 Nut 4 Collar 5 Rotating member 6 Y-shaped bolt
61 Nut 7 U-shaped bracket 8 Body belt 9 Ring

Claims (1)

  One end of the rope 1 is formed into a ring shape 11 and has a small-diameter loop portion 12 at the other end after a predetermined length. Rope detachable hook with untwist, characterized in that it can be connected and detached freely.

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