JP3287918B2 - Safety belt hook - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety belt used at a work place at a high place such as a construction site, and more particularly to a hook provided at a tip of a lifeline and engaged with a fixed object at a work place at a high place. It is about.

[0002]

2. Description of the Related Art Safety belts are used to ensure the safety of workers at high-altitude work sites. A hook is provided at the tip of a lifeline, and the lifeline connects the hook and the body belt. Is wrapped around the body of the person as is well known. Therefore, when the hook is engaged with a fixed object at an aerial work site, when the worker falls, the worker's body can be supported by the hook, the lifeline, and the torso belt.

A narrow belt having a special configuration is described in Japanese Utility Model Laid-Open Publication No. 2-94569, and a narrow belt described in the same publication can be used as a lifeline of a safety belt.
In the narrow belt of the same publication, an outer cylinder bedding is woven by abrasion-resistant rigid fiber yarns, and a number of yarns made of high-strength rigid fibers such as aramid fibers are inserted into the outer cylinder bedding, and the outer cylinder In the above, the yarn of the high-strength rigid fiber is arranged so as to extend in the length direction of the outer sheath, and is closely arranged in the width direction and the thickness direction of the outer sheath, and the core body is constituted by the yarn of the high-strength rigid fiber. You. Therefore, the core body is provided with a large strength and can be protected by the outer tubular cloth, and the narrow belt disclosed in the publication can be used as a lifeline of the safety belt. Therefore, the narrow belt can be wound on the take-up reel, and the take-up reel can be mounted on the trunk belt, and the work can be performed with the narrow belt wound on a high-place work site such as a construction site. It is easy to use and can enhance functionality.

[0004] In the safety belt, recently, there has been a concern about the safety of the hook. As long as the hooks are engaged with fixed objects at the workplace at a height, when the worker crashes, the hook, lifeline and torso belt can support the worker's body and it is safe, It is not always the case that the hook does not accidentally come off for some reason, or when a worker crashes. Therefore, there is a demand for preventing the hook from coming off and enhancing its safety.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a safety belt which is provided at the tip of a lifeline of a safety belt and which is engaged with a fixed object at a work place at a high place. The purpose is to increase the safety.

[0006]

According to the present invention, the hook-shaped main body is combined with the stopper, and the stopper is attached to the base of the main body, and swings between the closed position and the open position. In the closed position, the stopper extends toward the distal end of the body, and the stopper closes the base and the distal end of the main body. In the open position, the stopper is pushed into the main body, thereby opening the base and the distal end of the main body. Further, a lock mechanism is provided between the main body and the stopper, the stopper is locked in its closed position, a handle is provided between the main body and the lock mechanism, and the locking action of the lock mechanism is released by the handle.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.

In FIG. 1, this is a hook of a safety belt, which has a hook-shaped body 1 and is mounted on the tip of a lifeline. In this embodiment, a belt hole 3 is formed in the base portion 2 of the main body 1, and a narrow belt of Japanese Utility Model Application Laid-Open No. 2-94569 is used as a lifeline, which is passed through the belt hole 3 of the main body 1 and folded. , Are overlapped doubly, and the overlapping portion is joined by the binding thread. Further, the narrow belt is wound on a take-up reel, the take-up reel is mounted on a trunk belt, and the trunk belt is wound around the body of the worker.

Further, a stopper 4 is attached to the base 2 of the main body 1. As shown in FIG. 4, the stopper 4 is formed by bending a metal plate and has a U-shaped cross section.
And the base 2 is inserted between both walls of the stopper 4. Further, the main body 1 and the stopper 4 are connected by the pin 5, and the stopper 4 can swing around the pin 5. The stopper 4 swings between the closed position and the open position. As shown in FIG. 1, in the closed position, the stopper 4 extends toward the distal end 6 of the main body 1, and the distal end 6 is inserted between both walls of the stopper 4. You. Therefore, the stopper 4 closes the space between the base 2 and the tip 6 of the main body 1. Also,
As shown in FIG. 3, in the open position, the stopper 4 is pushed into the main body 1, whereby the space between the base 2 and the distal end 6 of the main body 1 is opened.

Further, the locking mechanism comprises a main body 1 and a stopper 4
It is provided between them. The lock mechanism includes a lock member 7 and a pin 8, and the lock member 7 has a longitudinal groove 9 and a width groove 10 that are continuous with each other. Like the stopper 4, the lock member 7 is also formed by bending a metal plate, has a U-shaped cross section, is fitted to a predetermined portion of the main body 1, and the main body 1 is inserted between both walls of the lock member 8. The pin 8 is inserted into the width direction groove 10 of the lock member 7 and fixed to the main body 1. Further, the lock member 7 is inserted between both walls of the stopper 4 and is connected by the pin 11, and the lock member 7 can swing around the pin 11. Further, in this embodiment, a spring 12 is provided around the pin 11 and is engaged with the stopper 4 and the lock member 7.
Are elastically biased clockwise. Therefore, in the width direction groove 10 of the lock member 7, the terminal end is engaged with the pin 8. Further, the stopper 4 receives the reaction force of the spring 12, and the stopper 4 is elastically urged counterclockwise around the pin 5 so as to be kept at the closed position. Therefore,
The lock member 7 and the pin 8 act on the stopper 4, and as it is, the stopper 4 is locked in the closed position in FIG. 1 and cannot swing to the open position in FIG.

Further, a handle 13 is provided between the main body 1 and the lock mechanism. The handle 13 is also formed by bending a metal plate, has a U-shaped cross section, is disposed on the opposite side of the stopper 4, is fitted to the main body 1 and the lock member 7, and the main body 1 and the lock member 7 are both walls of the handle 13. Inserted between them. Further, the handle 13 and the main body 1 are connected by a pin 14, and the handle 13 is
4 can be swung around. Further, an auxiliary plate is provided on the inner surface of the handle 13, and the raised plate 1 is provided by the auxiliary plate.
5 is formed, and when the handle 13 is swung clockwise around the pin 14, the protrusion 15 can be engaged with the lock member 7.

Therefore, when the handle 13 is swung clockwise in this hook, the ridge 15 is engaged with the lock member 7 and the handle 13 locks the lock member 7.
Is pushed up. Therefore, as shown in FIG. 2, the lock member 7 swings counterclockwise around the pin 11, and the pin 8 is displaced along the width direction groove 10 of the lock member 7, and Reach. As a result, the locking action between the lock member 7 and the pin 8 is released. Therefore, in this state, when the stopper 4 is pressed against a fixed object at a work place at a high place, the stopper 4 swings around the pin 5,
It is pushed into the main body 1 and swings to the open position in FIG. Accordingly, the lock member 7 swings around the pin 11, and the pin 8 is displaced along the longitudinal groove 9 of the lock member 7. As a result, the space between the base portion 2 and the distal end 6 of the main body 1 is opened, and a fixed object at a work place at a high place is inserted into the main body 1. Therefore, the main body 1 is engaged with the fixed object at the work site at a high place.

Therefore, when the handle 13 is released thereafter, the spring 12 acts on the stopper 4 and the lock member 7, and the stopper 4 swings around the pin 5 and returns to the original position. Accordingly, the lock member 7 is
1, the pin 8 is displaced along the lengthwise groove 9 of the lock member 7 and reaches the widthwise groove 10. Further, the pin 8 is displaced along the width direction groove 10 of the lock member 7, and the end of the pin 8 engages with the pin 8 in the width direction groove 10. Therefore, the stopper 4 swings to the closed position in FIG. 1, and the stopper 4 closes the space between the base 2 and the tip 6 of the main body 1. Further, the lock member 7 and the pin 8 act on the stopper 4, and the stopper 4 is locked in the closed position in FIG. 1 and cannot swing to the open position in FIG. Therefore, thereafter, the main body 1 is maintained in a state of being engaged with the fixed object at the work site at a high place, and there is no possibility that the main body 1 is accidentally detached unless the locking operation of the locking member 7 and the pin 8 is released by the handle 13.

[0014]

As described above, according to the present invention, the stopper 4 closes the space between the base 2 and the distal end 6 of the main body 1 and locks the stopper 4 in its closed position. Therefore, as long as the main body 1 is kept engaged with the fixed object at the work site at a high place and the locking action of the locking mechanism is released by the handle 13, there is no possibility that the main body 1 is accidentally detached, and the safety and the expected Can achieve the purpose.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a side view showing a state in which a lock operation of a lock mechanism of FIG. 1 is released.

FIG. 3 is a side view showing a state in which the base and the tip of the main body of FIG. 1 are opened.

FIG. 4 is an exploded view of the hook of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Base 4 Stopper 6 Tip 7 Lock member 8 Pin 13 Handle

Claims (1)

(57) [Claims] 1. A hook mounted on the tip of a lifeline of a safety belt and engaged with a fixed object at a work place at a high place, comprising: a hook-shaped main body (1); a stopper (4); ) To the base (2) of the body (1), the stopper (4) extending toward the tip (6) of the body (1), and A) a closed position for closing between the base (2) and the tip (6);
It can be swung around the first pin (5) between an open position where it is pushed into the main body (1) and opens between the base (2) and the tip (6) of the main body (1); In the vicinity of the base (2), a lock member (7) provided between the main body (1) and the stopper (4), and a second pin (4) connecting the stopper (4) and the lock member (7). 11), wherein the lock member (7) is swingable around the second pin (11) with respect to the stopper (4), and further has a length formed on the lock member (7). Direction groove (9)
An upward width direction groove (10) formed in the lock member (7) and continuing in an L-shape at the end of the main body (1) side, of both ends of the length direction groove (9); A third pin (8) fixed to the body (1), inserted into the width direction groove (10) and locking the stopper (4) in the closed position; and around the second pin (11). The stopper (4) acts on the stopper (4) and the lock member (7) to elastically urge the stopper (4) to the closed position, and the third pin (8) pushes the lock member (7) to the third pin (8). Groove in width direction (1
A spring (12) elastically biased to be inserted into the handle (13), a handle (13), and a fourth connecting the handle (13) and the body (1).
A pin (14), wherein the handle (13) is swingable about the fourth pin (14) relative to the body (1), and further formed on the handle (13); (1
With the swing of 3), the lock member (7) is engaged with the lock member (7), and the lock member (7) is pushed up and swung, so that the third pin (8) moves along the width direction groove (10). A ridge (15) which displaces and reaches said longitudinal groove (9), whereby the locking action of said locking member (7) and said third pin (8) is released. Features safety belt hook.