JP3833377B2 - Safety belt hook - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a safety belt hook useful for a safety belt that prevents a worker at high altitude at a construction site or the like from falling.
[0002]
[Prior art]
Conventionally, as this type of safety belt hook, for example, as described in Utility Model Registration No. 3010393, a hook body connected to the safety belt side and an opening / closing member that opens and closes a locking portion of the hook body The safety belt side and the scaffold side are connected by opening the opening / closing member and locking the anchoring member on the scaffolding side to the anchoring portion. Further, the safety belt hook includes a lock mechanism that holds the opening / closing member in a closed state, thereby preventing an inadvertent opening operation of the opening / closing member.
[0003]
[Problems to be solved by the invention]
However, the conventional safety belt hook requires a two-step operation such as opening the opening / closing member after releasing the lock mechanism when locking the locking member on the scaffolding side to the locking portion of the hook body. For this reason, the operation at the time of locking becomes complicated, and the worker who frequently moves the scaffold has become very troublesome to attach and detach the safety belt and the scaffold.
[0004]
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 capable of easily attaching and detaching the safety belt side and the scaffold side.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention includes a hook body connected to a safety belt side and an opening / closing member that opens and closes a locking portion provided on one end side of the hook body. In the safety belt hook in which the anchoring member on the scaffolding side is locked to the locking part of the hook main body by opening the hook, the opening / closing member is rotatably supported on one end side of the locking part for one or more rotations. A support mechanism, a lock member that is movably provided in the longitudinal direction of the hook body, and that holds the open / close member in a closed state by engaging with the tip of the open / close member; and the lock member and the open / close member only in a predetermined rotational direction. One-way movable mechanism that allows engagement and disengagement of the hook, and an operation member that is connected to the lock member and is provided on the other end side of the hook body so as to be movable and rotatable in the longitudinal direction and the circumferential direction of the hook body, respectively. equipped with a door, With a configuration such that engagement between the locking member and the opening and closing member by moving in the longitudinal direction of the hook body is released toward the work member on the opposite side of the locking portion, towards the operating member locking portion By moving the hook body in the longitudinal direction and rotating to a predetermined position in the circumferential direction of the hook body, the operation member is configured to be restricted from moving in the other longitudinal direction of the hook body . As a result, when the safety band hook is locked to the anchoring member on the scaffolding side, the engagement member between the lock member and the opening / closing member is moved by the one-way movable mechanism by bringing the opening / closing member of the hook body into contact with the locking member. The engagement is released, and the opening / closing member rotates to open the locking portion of the hook body. As a result, the locking member is housed in the locking portion of the hook body, the opening / closing member rotates once, the tip of the opening / closing member is again engaged with the lock member by the one-way movable mechanism, and the locking portion is closed. The Also, when removing the safety belt hook from the anchoring member on the scaffold side, the operating member is rotated in the circumferential direction of the hook body and moved in the longitudinal direction of the hook body toward the opposite side of the anchoring portion. The locking member is disengaged from the tip of the opening / closing member, the engagement between the locking member and the opening / closing member is released, and the locking portion is opened.
[0006]
According to a second aspect of the present invention, in the safety band hook according to the first aspect, the support mechanism includes a pair of plate-like portions facing each other at a distance so as to allow the passage of the opening / closing member, and a base of the opening / closing member. It comprises a spindle that rotatably supports the end side on each plate-like portion. Thus, in addition to the operation of the first aspect, since the opening / closing member passes between the plate-like portions, the opening / closing member can be rotated more than once, so the support mechanism is configured with a simple structure. The
[0007]
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 proximal end portion and a distal end portion that are rotatably connected to each other, and the proximal end portion and the distal end portion are formed. The one-way movable mechanism is configured by connecting the rotations in a predetermined direction from a predetermined position so as to be restricted. Thus, in addition to the operation of the first or second aspect, the lock member and the opening / closing member are engaged and disengaged from each other by rotating the proximal end portion and the distal end portion in a predetermined direction. The direction movable mechanism is configured by a simple structure.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 to 5 show an embodiment of the present invention. FIG. 1 is a front view of a safety belt hook, FIG. 2 is a side view thereof, and FIGS.
[0009]
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, a lock member 3 for holding the opening / closing member 2 in a closed state, and a lock. An operation member 4 for operating the member 3 is configured.
[0010]
The hook body 1 has a locking portion 1a curved in a substantially C shape on one end side, and a connecting ring 1b to which a belt on the safety belt side (not shown) is connected is attached to the other end of the hook body 1. Further, one end side and the other end side of the locking portion 1a are formed by a pair of plate-like portions 1c facing each other with a space therebetween.
[0011]
The opening / closing member 2 includes a base end portion 2a that is rotatably supported on one end side of the locking portion 1a, and a distal end portion 2b that is rotatably supported by the base end portion 2a. The distal end portions 2b are formed to have a width that can pass between the plate-like portions 1c of the hook body 1. That is, the opening / closing member 2 is disposed between each plate-like portion 1c so as to be able to close between one end and the other end of the locking portion 1a, and each plate around the support shaft 2c on one end side of the locking portion 1a. It is possible to make one or more revolutions by passing between the portions 1c. That is, a support mechanism is constituted by each plate-like portion 1c and the support shaft 2c. In addition, the base end portion 2a and the tip end portion 2b are connected to each other via a support shaft 2d so as to partially overlap each other, so that the clockwise rotation in the figure is restricted from a position that is substantially linear with each other. It has become. That is, a one-way movable mechanism is configured by the base end portion 2a, the tip end portion 2b, and the connection structure thereof.
[0012]
The locking member 3 is disposed on the other end side of the locking portion 1a, and a concave engaging portion 3a capable of engaging the tip of the opening / closing member 2 is provided at one end thereof. Further, a long hole 3 b for connecting to the operation member 4 is provided on the other end side of the lock member 3, and the long hole 3 b is formed in a straight line in the width direction of the hook body 1.
[0013]
The operation member 4 is formed of a cylindrical member inserted on the other end side of the hook body 1 and is provided so as to be movable and rotatable in the longitudinal direction and the circumferential direction of the hook body 1, respectively. A substantially L-shaped long hole 4a is provided on the peripheral surface of the operation member 4, and a pin 4b fixed on the hook body 1 side is fitted into the long hole 4a. The operation member 4 is fixed with a pin 4c that fits into the elongated hole 3b of the lock member 3. 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. Yes. That is, the operation member 4 can move 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 the pin 4b extends in the circumferential direction of the hook body 1. When it is located in the long hole 4a, the movement of the hook body 1 in the longitudinal direction is restricted.
[0014]
When the safety band hook configured as described above is locked to the anchoring 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. The proximal end portion 2a and the distal end portion 2b of the opening / closing member 2 rotate 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 centered on the support shaft 2c. It rotates in the inner direction of the locking part 1a. As a result, the locking member A is accommodated in the locking portion 1a of the hook body 1, and the opening / closing member 2 passes between the plate-like portions 1c on one end side of the locking portion 1a as shown in FIG. Make a full turn. As a result, the distal end portion 2 b of the opening / closing member 2 is engaged again with the engaging portion 3 a of the lock member 3, and the locking portion 1 a is closed by the opening / closing member 2. In this case, the operation member 4 is positioned on the locking portion 1 a side, and the lock member 3 is held at a position where it can engage with the opening / closing member 2.
[0015]
Further, when removing the safety belt hook from the anchoring member A on the scaffold side, as shown in FIG. 5, the operating member 4 is rotated in the circumferential direction of the hook body 1 and moved in the direction opposite to the anchoring portion 1a. . As a result, the engaging portion 3a of the lock member 3 is disengaged from the tip end portion 2b of the opening / closing member 2, and the opening / closing member 2 is rotated outwardly of the locking portion 1a, whereby the locking portion 1a is opened and locked. Removed from member A.
[0016]
Thus, according to the safety belt hook of the present embodiment, the opening / closing member 2 that closes the locking portion 1a of the hook main body 1 is rotated once in the inner direction of the locking portion 1a, and the locking portion 1a is closed again. Therefore, the opening / closing member 2 can be locked to the locking member A by a simple operation such as bringing the opening / closing member 2 into contact with the locking member A, and attachment / detachment work between the safety belt side and the scaffold side is extremely easy. It can be carried out. Moreover, since the opening / closing member 2 can be rotated one or more times by passing the opening / closing member 2 between the plate-like portions 1c, the support mechanism can be configured with a simple structure. Furthermore, since the lock member 3 and the opening / closing member 2 are engaged with each other and released from each other by rotating the proximal end portion 2a and the distal end portion 2b of the opening / closing member 2, the one-way movable mechanism can be simplified. Can be configured by structure.
[0017]
In the above embodiment, the unidirectional movable mechanism is configured by the base end portion 2a and the distal end portion 2b of the opening / closing member 2 and its connection structure. However, as another unidirectional movable mechanism, for example, an elastic member such as a spring is used. It is also possible to comprise a retractable member or the like urged in the protruding direction by the member.
[0018]
【The invention's effect】
As described above, according to the safety band hook of the first aspect, the safety band side and the scaffold can be secured to the locking member by a simple operation such as bringing the opening / closing member into contact with the locking member. The attachment / detachment work to and from the side can be performed very easily, and is particularly effective for workers who often move the scaffold.
[0019]
According to the safety band hook of claim 2, in addition to the effect of claim 1, the support mechanism can be configured with a simple structure, which is extremely advantageous for practical use.
[0020]
According to the safety band hook of claim 3, in addition to the effect of claim 1 or 2, the one-way movable mechanism can be configured with a simple structure, which is extremely advantageous in practical use.
[Brief description of the drawings]
FIG. 1 is a front view of a safety belt hook according to an embodiment of the present invention. FIG. 2 is a side view of the safety belt hook. FIG. 3 is an operation explanatory diagram of the safety belt hook. Operational diagram of [Fig.5] Operational diagram of safety belt hook [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Hook main body, 1a ... Locking part, 2 ... Opening / closing member, 3 ... Lock member, 4 ... Operation member, A ... Locking member.

Claims (3)

A hook body connected to the safety belt side and an opening / closing member that opens and closes a locking portion provided on one end side of the hook body, and the scaffold side connection to the locking portion of the hook body by opening the opening / closing member. In the safety belt hook that is designed to lock the stop member,
A support mechanism for supporting the opening / closing member on one end side of the locking portion so as to be rotatable more than one rotation;
A lock member that is provided so as to be movable in the longitudinal direction of the hook body, and that holds the open / close member in a closed state by engaging the tip of the open / close member;
A one-way movable mechanism that allows engagement and disengagement of the lock member and the opening / closing member only in a predetermined rotation direction;
An operation member connected to the lock member and provided on the other end side of the hook body so as to be movable and rotatable in the longitudinal direction and the circumferential direction of the hook body ,
It is configured so that the engagement between the lock member and the opening / closing member is released by moving the operation member in the longitudinal direction of the hook body toward the opposite side of the locking portion ,
The operation member is moved in the longitudinal direction of the hook body toward the locking portion side and rotated to a predetermined position in the circumferential direction of the hook body so that the operation member is restricted from moving in the other longitudinal direction of the hook body. safety belt hook, characterized in that the configuration was. The support mechanism includes a pair of plate-like portions facing each other at a distance so as to allow passage of the opening / closing member, and a support shaft that rotatably supports the base end side of the opening / closing member on each plate-like portion. The safety belt hook according to claim 1, wherein the safety belt hook is configured. By forming the opening / closing member from a proximal end and a distal end that are rotatably connected to each other, and connecting the proximal end and the distal end to each other so as to be restricted from rotating 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.

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