JPH11164897A - Safety belt hook - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety belt hook which can facilitate attaching and detaching operations between the safety belt side and the footing side. SOLUTION: By bringing an opening and closing member 2 of a hook body 1 into contact with a stopping member A on the footing side, a base end 2a and the front end 2b of the opening and closing member 2 rotate mutually centering on a spindle 2c, the front end 2b is disengaged from an engaging part 3a of a lock member 3, and the opening and closing member 2 rotates centering on the spindle 2c in the inward direction of a stopping part 1a. Thereby, the stopping member A is housed inside the stopping part 1a of the hook body 1, and the opening and closing member 2 makes one turn passing through each plate-like part 1c on one end side of the stopping part 1a. As a result, the front end 2b of the opening and closing member 2 engages again with the engaging part 3a of the lock member 3, and the stopping part 1a is closed by the opening and closing member 2. Further, by rotating an operation member 4 in the circumferential direction of the hook body 1 to move it in the opposite direction of the stopping part 1a, the engaging part 3a of the lock member 3 is disengaged from the front end 2b of the opening and closing member 2, whereby the opening and closing member 2 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety belt hook useful as a safety belt for preventing a worker at a high place from falling down at a construction site or the like.

[0002]

2. Description of the Related Art Conventionally, as a hook for a safety belt of this type, for example, as described in Japanese Utility Model Registration No. 3010393, a hook main body connected to the safety belt side and a hook portion of the hook main body are connected. Opening and closing member for opening and closing,
2. Description of the Related Art There is known a structure in which a safety band side and a scaffold side are connected by opening an opening / closing member and locking a scaffold-side locking member to a locking portion. Further, the safety belt hook includes a lock mechanism for holding the opening / closing member in a closed state, thereby preventing an inadvertent opening operation of the opening / closing member.

[0003]

However, in the conventional safety belt hook, when the locking member on the scaffold side is locked to the locking portion of the hook body, the locking mechanism is released and then the opening and closing member is opened. This requires two-stage operation, such as the operation of the vehicle, which complicates the operation at the time of anchoring, and for workers who often move the scaffold, attaching and detaching work between the safety belt and the scaffold side is extremely troublesome. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a safety belt hook which can easily perform attachment / detachment work between a safety belt side and a scaffold side. It is in.

[0005]

In order to achieve the above object, according to the present invention, there is provided a hook body connected to a safety belt side, and an opening / closing member for opening and closing a locking portion of the hook body. In a safety belt hook in which the locking member on the scaffold side is locked to the locking portion of the hook body by opening the opening and closing member, the opening and closing member can be rotated at least one rotation to one end side of the locking portion. A lock mechanism for holding the open / close member in a closed state by engaging with the tip of the open / close member; and allowing and disengaging the lock member and the open / close member only in a predetermined rotation direction. A one-way movable mechanism, and an operation member for releasing engagement between the lock member and the opening / closing member by a predetermined operation. This allows
When locking the safety belt hook to the locking member on the scaffold side,
By bringing the opening and closing member of the hook body into contact with the locking member, the engagement between the lock member and the opening and closing member is released by the one-way movable mechanism, and the opening and closing member rotates to open the locking portion of the hook body. . As a result, the locking member is accommodated in the locking portion of the hook body, the opening / closing member rotates once, and the tip of the opening / closing member is again engaged with the locking member by the one-way movable mechanism to close the locking portion. You. Further, when removing the safety belt hook from the locking member on the scaffold side, by operating the operation member, the engagement between the locking member and the opening / closing member is released, and the locking portion is opened.

According to a second aspect of the present invention, in the safety belt hook according to the first aspect, the support mechanism includes a pair of plate-shaped portions facing each other at an interval so as to allow passage of the opening / closing member. And a support shaft rotatably supporting the base end of the member on each plate-like portion. Thus, in addition to the function of the first aspect, the opening / closing member can rotate more than one rotation by passing the opening / closing member between the respective plate-shaped portions, so that the support mechanism has a simple structure. You.

According to a third aspect of the present invention, in the safety band hook according to the first or second aspect, the opening / closing member is formed of a base end and a front end which are rotatably connected to each other. The one-way movable mechanism is configured by connecting the parts to each other so as to restrict the rotation only from a predetermined position in a predetermined direction. Thereby, claim 1 or 2
In addition to the above-described operation, the base member and the base member are rotated in a predetermined direction, whereby the lock member and the opening / closing member are engaged and disengaged from each other. Be composed.

[0008]

1 to 5 show an embodiment of the present invention. FIG. 1 is a front view of a hook for a safety belt, and FIG.
Is a side view thereof, and FIGS. 3 to 5 are explanatory diagrams of its operation.

The safety belt hook includes a hook body 1 connected to the safety belt side, an opening / closing member 2 rotatably attached to the hook body 1, and a locking member 3 for holding the opening / closing member 2 in a closed state. And an operation member 4 for operating the lock member 3.

The hook main body 1 has a substantially C-shaped locking portion 1a at one end, and a connection ring 1b to which a belt (not shown) of the safety belt is connected is attached to the other end of the hook main body 1. ing. One end and the other end of the locking portion 1a are formed by a pair of plate-like portions 1c facing each other at an interval.

The opening / closing member 2 comprises a base 2a rotatably supported at one end of the locking portion 1a, and a distal end 2b rotatably supported by the base 2a. The portion 2a and the tip 2b are each formed to have a width allowing passage between the plate-like portions 1c of the hook body 1. That is, the opening / closing member 2 is disposed between the plate-shaped portions 1c so as to be able to close between one end and the other end of the locking portion 1a, and each plate is arranged around a support shaft 2c on one end side of the locking portion 1a. More than one rotation can be made by passing between the portions 1c. That is, a support mechanism is constituted by each plate-like portion 1c and the support shaft 2c. Further, the base end portion 2a and the front end portion 2b are connected to each other via a support shaft 2d so as to partially overlap with each other, so that the clockwise rotation in the drawing is restricted from a substantially linear position. Has become. That is, the one-way movable mechanism is constituted by the base end 2a, the front end 2b, and the connection structure thereof.

The lock member 3 is disposed at the other end of the locking portion 1a, and at one end thereof is provided a concave engaging portion 3a with which the tip of the opening and closing member 2 can be engaged. A long hole 3b for connecting to the operation member 4 is provided at the other end of the lock member 3, and the long hole 3b is formed in a straight line in the width direction of the hook body 1.

The operating member 4 is a cylindrical member inserted into the other end of the hook main body 1 and is provided so as to be movable and rotatable in the longitudinal direction and the circumferential direction of the hook main body 1, respectively. A substantially L-shaped elongated hole 4a is provided on the peripheral surface of the operation member 4, and a pin 4b fixed to the hook body 1 side is provided in the elongated hole 4a.
Is inserted. The operating member 4 includes a lock member 3.
A pin 4c fitted into the long hole 3b is fixed, and the other end of the lock member 3 and the operation member 4 are connected to each other via the pin 4c so as to be movable in the circumferential direction. That is, the operation member 4 is movable in the longitudinal direction of the hook body 1 by positioning the pin 4b in the elongated hole 4a extending in the longitudinal direction of the hook body 1, and extends the pin 4b in the circumferential direction of the hook body 1. When the hook body 1 is located in the elongated hole 4a, the movement of the hook body 1 in the longitudinal direction is restricted.

When the safety belt hook configured as described above is to be locked to the locking member A on the scaffold side, the opening / closing member 2 of the hook body 1 is brought into contact with the locking member A as shown in FIG. As a result, the base end portion 2a and the distal end portion 2b of the opening / closing member 2 rotate relative to each other about the support shaft 2d, the distal end portion 2b is disengaged from the engaging portion 3a of the lock member 3, and the opening / closing member 2 is connected to the support shaft 2c. Is rotated inward of the locking portion 1a. Thereby, the locking member A is housed in the locking portion 1a of the hook body 1, and the opening / closing member 2 passes between the respective plate-like portions 1c on one end side of the locking portion 1a as shown in FIG. One turn. As a result, the distal end portion 2b of the opening / closing member 2 is again engaged with the engaging portion 3a of the lock member 3, and the locking portion 1a is closed by the opening / closing member 2. In this case, the operation member 4 is located on the locking portion 1a side, and the lock member 3 is held at a position where it can be engaged with the opening / closing member 2.

When the safety belt hook is to be removed from the locking member A on the scaffold, the operating member 4 is rotated in the circumferential direction of the hook body 1 as shown in FIG. Move to As a result, the engaging portion 3a of the lock member 3 is disengaged from the distal end portion 2b of the opening / closing member 2, and the opening / closing member 2 is rotated outward of the locking portion 1a, whereby the locking portion 1a is opened and locked. Removed from member A.

As described above, according to the safety belt hook of the present embodiment, the opening / closing member 2 for closing the locking portion 1a of the hook body 1 is rotated once inward of the locking portion 1a, and the locking portion is again rotated. Since the opening / closing member 2 is configured to be closed, the opening / closing member 2 can be locked to the locking member A by a simple operation such as contact with the locking member A, and the attachment / detachment work between the safety belt side and the scaffold side can be performed. It can be done very easily. Further, since the opening / closing member 2 is allowed to make one or more rotations by passing the opening / closing member 2 between the plate-shaped portions 1c, the support mechanism can be configured with a simple structure. Further, by rotating the base end 2a and the distal end 2b of the opening / closing member 2 relative to each other, the locking member 3 and the opening / closing member 2 are engaged and disengaged from each other. It can be configured by the structure.

In the above embodiment, the one-way movable mechanism is constituted by the base end 2a and the distal end 2b of the opening / closing member 2 and the connecting structure thereof. It is also possible to use a resilient member that is urged in the protruding direction by an elastic member such as the above.

[0018]

As described above, according to the safety belt hook of the first aspect, the opening / closing member can be locked to the locking member by a simple operation such as contacting the locking member. The attachment / detachment work between the safety belt side and the scaffold side can be performed extremely easily, which is particularly effective for workers who frequently move the scaffold.

According to the safety belt hook of the second aspect, in addition to the effect of the first aspect, the support mechanism can be configured with a simple structure, which is extremely advantageous for practical use.

According to the safety belt hook of the third aspect, in addition to the effects of the first and second aspects, the one-way movable mechanism can be constituted by a simple structure, which is extremely advantageous for practical use. .

[Brief description of the drawings]

FIG. 1 is a front view of a safety belt hook showing an embodiment of the present invention.

FIG. 2 is a side view of a safety belt hook.

FIG. 3 is a diagram illustrating the operation of the safety belt hook.

FIG. 4 is an explanatory view of the operation of the safety belt hook.

FIG. 5 is an explanatory view of the operation of the safety belt hook.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hook main body, 1a ... Lock part, 2 ... Opening / closing member, 3 ... Lock member, 4 ... Operating member, A ... Lock member.

Claims (3)

[Claims] 1. A hook body connected to the safety belt side, and an opening / closing member for opening and closing a hooking portion of the hook body, and the scaffolding side fastening to the hooking portion of the hook body by opening the opening / closing member. In a safety belt hook configured to lock a member, a support mechanism that supports the opening / closing member at one end side of the locking portion so as to be rotatable one or more rotations, and an opening / closing member that is engaged with a tip of the opening / closing member. A lock member for holding the lock member in a closed state, a one-way movable mechanism for allowing engagement and disengagement of the lock member and the open / close member only in a predetermined rotation direction, and engagement of the lock member and the open / close member by a predetermined operation And an operating member for releasing the hook. 2. A pair of plate-shaped portions facing each other at an interval so as to allow passage of the opening / closing member, and a base end side of the opening / closing member rotatably supported by each plate-shaped portion. 2. A safety belt hook according to claim 1, wherein said hook comprises a supporting shaft. 3. The opening / closing member is formed of a base end and a tip end which are rotatably connected to each other, so that the base end and the tip end are restricted from rotating from each other only in a predetermined direction from a predetermined position. The safety belt hook according to claim 1 or 2, wherein the one-way movable mechanism is configured by being connected to the hook.