JPH10205586A - Annular hook provided with locking mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an opening and closing member from being inadvertently opened in use of an annular hook, so as to improve reliability, by freely opening and closing the opening and closing member only when a lock member is moved to one end of a V-shape bent elongated hole. SOLUTION: When an opening and closing member 4 is opened or closed, a lock member 8 is moved to the end of an upper side elongated hole part 7a in a state where the opening and closing member 4 is in the closing position. When the opening member 4 is pressed in the opening direction against a spring 6, the lock member 8 is moved in the upper side elongated hole 7a of the side plate of the opening and closing member 4 by the opening movement taking a pivot shaft 5 as the axis, and the opening and closing member 4 is opened as shown by a broken line. When the opening and closing member 4 is locked in the closing position, the lock member 8 is moved to the lower end of the bent elongated hole 7. The lock member 8 passes a part to which spring force is strongly applied inward from the bent spring plate 9 by strong spring force and settled on the lower end of the bent elongated hole 7. Therefore, the opening and closing member 4 can not be moved and kept locked in the closing position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an annular hook having an opening mechanism mainly used by being assembled to a chain or the like. More specifically, the present invention relates to a locking mechanism for opening and closing an opening of an annular hook. The present invention relates to an annular hook with an opening mechanism having an additional function.

[0002]

2. Description of the Related Art As an annular hook with an opening to be used by being attached to a chain or the like, a wire having a predetermined length is bent into a U-shape at two places to form an open portion between both ends of the wire, and one end is formed at one end. Attaching the base end of the opening / closing member to the pivot, urging the opening / closing member in the closing direction by interposing a spring in the pivot portion, and engaging and disengaging the free end of the opening / closing member to the other corresponding end to open the opening. An annular hook configured to open and close has been put to practical use.

[0003] An annular hook with an opening of this kind is used, for example, for connecting two chains, and is handled without concern that this is present in the chain. By simply pressing the member against the spring, the member can be easily formed and the use of the chain is facilitated.

However, as described above, when an open-ended annular hook having a structure in which a spring is interposed in a pivot portion and an opening / closing member is urged in a closing direction is used for connection of a chain, etc., it is difficult to handle the chain. There is a possibility that the opening and closing member is opened for some reason and the chain is inadvertently detached, which is unreliable.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention provides a locking member which can lock the opening / closing member in a closed position by a simple operation, and a pivotal portion formed on a hook body and an abutment with the pivotal portion. A state in which the locking member is moved to one end of the bent-shaped elongated hole by manual operation and is securely held by being movably arranged in the bent-shaped elongated hole provided in the side plate of the opened / closed member. It is an object of the present invention to provide a highly reliable annular hook with an opening that allows the opening / closing member to be opened only by the opening.

[0006]

In order to achieve the above object, an annular hook with an opening mechanism according to claim 1 of the present invention has an opening portion of the hook body at a pivot formed on the hook body. An opening / closing member that opens and closes is pivotally attached via a pivot, and a side plate formed on the opening / closing member is attached to a pivoting portion surface, and the opening / closing member coincides with the side plate and the pivoting portion in a closed position behind the pivot. A rectangular bent hole is provided, and the upper slot formed from the middle of the bent slot to the upper end of the hole is set on an arc line centered on the pivot, and the middle bent portion of the bent slot is set. And a lower slot extending from the lower end to the lower end of the hole is set by gradually changing the distance to the pivot, and a rod-shaped lock member parallel to the pivot is movably inserted into the bent elongated hole, and the lock An elastic member for holding the elastic member at an end of the bent elongated hole is disposed in the bent elongated hole of the pivot portion.

Here, in the state where the lock member is moved to the upper end of the bent elongated hole with the opening / closing member in the closed position,
Since the upper slot of the bending hole is set on an arc line centered on the pivot, the opening and closing member is moved around the pivot and the locking member moves the upper slot of the side plate of the opening and closing member. The opening and closing member can be opened and closed. Further, in a state where the lock member is moved to the lower end portion of the bent slot in a state where the opening and closing member is in the closed position, the lower slot portion of the bent slot is set by gradually changing the distance from the pivot. Therefore, if the lock member is present at the lower end of the bent elongated hole, the opening / closing member cannot be moved and is locked at the closed position.

[0008] As described above, the lock member is required to move the bent elongated hole in a state where the opening / closing member is in the closed position, and to hold the bent elongated hole at the upper end portion or the lower end portion, that is, to be settled. Here, the elastic member for holding the lock member at the end of the bent elongated hole is constituted by a thin two-fold bent spring plate almost in contact with the entire bent elongated hole of the pivot portion as in the invention according to claim 2. Preferably, the upper end of the bent slot is formed so that the spring force of the separated ends of the bent spring plate acts in the direction of sandwiching the lock member. With such a configuration, the spring force of the separated ends of the bent spring plate increases as the lock member moves toward the upper end of the bent elongated hole. The movement of the lock member can only be performed by artificial means. After the lock member is moved to the upper end portion of the bent slot, the lock member is held at the upper end portion of the bent slot even if the user releases his / her hand.

On the other hand, in order to hold the lock member at the lower end of the bent elongated hole, the intermediate folded portion of the bent spring plate is rounded at the lower end of the bent elongated hole. A holding portion is formed, and a distorted portion in which a spring force acts more inward is formed at a portion where the lock member enters and exits from the holding portion. When the member moves to the lower end portion of the bent slot, it is preferable to provide a small mountain-shaped projection that overcomes the spring force of the bent spring plate below the pivotal edge of the bent slot in the side plate. With this configuration, when the lock member is moved to the lower end portion of the bent elongated hole in a state where the opening / closing member is in the closed position, the lock member passes through a strained portion where a spring force acts strongly inward of the spring plate,
In addition, in correspondence with this distorted portion, the bent portion of the side plate passes over the small ridge having the narrowed hole width and is calmly held at the lower end portion of the bent long hole.

[0010] Further, as this kind of an annular hook having an opening mechanism, generally, when connecting two chains,
It is used to connect the chains with each other when assembled to one of the ends of the chain, but it may be attached to the end of the chain and used as a simple hook. Therefore, a hook-shaped connecting portion having an open portion is formed behind the pivotally attached portion of the hook body, and the free end of the bar-shaped curved portion formed in the hook-shaped connecting portion is provided. It is preferable that the opening portion can be closed by deforming by deepening the curve by hammering from the outside. According to this structure, not only can the chain end ring be connected to the hook body portion with the opening / closing member and the hook-shaped connecting portion can be used as a freely detachable hook, but also one chain can be used to connect the two chains. It can be conveniently used to separate and connect the chains with each other when assembled at the end.

Further, according to a general chain structure,
Although it has almost no untwisting function, the hook body and the hook-shaped connecting portion are separated from each other as in the invention according to claim 6, and the connecting shaft projecting toward the rear of the pivoting portion of the hook body is provided. When the penetrating joint is rotatably penetrated to the non-deformable base formed on the hook-shaped connecting part, the chain that is freely rotated at the connecting part between the hook body and the hook-shaped connecting part to exhibit the untwisting function is used. Make it more convenient.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of an annular hook with a stopper according to the present invention, FIG. 2 is a partial cross-sectional front view showing a state in which the opening and closing member can be opened and closed, and FIG. FIG. 4 is a partial cross-sectional front view showing a locked state, and FIG. 4 is a perspective view of an elastic member.

In each of the drawings, reference numeral 1 denotes a hook body, and the hook body 1 is formed by bending a wire at two places in a U-shape.
A pivot portion 2 is provided inside the hook body 1, and an opening 3 is formed between the pivot portion 2 and one end 1 a of the hook body 1.

Reference numeral 4 denotes an opening / closing member whose base end is pivotally connected to the pivoting portion 2 via a pivot 5, and whose free end is engaged and disengaged with the end portion 1a of the hook body 1 to open and close the opening portion 3. Numeral 4 is bent into a U-shape in cross section by molding of a plate material, and is opened and closed toward the inside of the hook body 1. A pivot 5 connects a side plate 4 a formed on the opening / closing member 4 to a pivoting portion 2. It is inserted into a shaft hole which is attached to the upper side and is bored from the side plate 4a to the pivot portion 2. A spring 6 is interposed in the pivot 5 in the opening / closing member 4 to urge the opening / closing member 4 in the closing direction.

Reference numeral 7 denotes a rectangular slotted hole formed at the rear of the pivot 5 and formed in the side plate 4a and the pivoting portion 2 respectively. Both rectangular holes formed in the side plate 4a and the pivoting portion 2 are provided. The bent long hole is formed so as to match when the opening / closing member 4 is in the closed position. The upper long hole 7a extending from the middle bent portion of the bent long hole 7 to the upper end of the hole is connected to the pivot 5. The lower elongate hole 7b is set on an arc line having the center as the center, and extends from the middle part of the elongate hole 7 to the lower end of the hole, and the distance to the pivot 5 is gradually changed.

Reference numeral 8 denotes a lock member movably inserted into the bent elongated hole 7. The lock member 8 in the embodiment is constituted by a rod-shaped body parallel to the pivot 5, and both ends of the lock member 8 are provided on the side plate 4a surface of the opening / closing member 4. A rounded knob head 8a is formed by projecting, and a fingertip is applied to the knob heads 8a at both ends of the lock member 8 from outside, and the lock member 8 is held parallel to the pivot 5.
Is like being manipulated.

Reference numeral 9 denotes a bent slot 7 of the pivot portion 2 of the hook body 1.
The elastic member 9 of the embodiment is an elastic member disposed in
It is composed of a thin two-fold bent spring plate that is almost entirely in contact with the bent slot 7. At the upper end of the bent slot 7, as shown in FIG. The holding member 9a is formed so as to oppose the lock member 8 so as to oppose the locking member 8 and round the middle two-folded portion of the bent spring plate corresponding to the lower end of the bent elongated hole 7 with respect to the holding portion 9a. A distorted portion 9b is formed in the portion where the lock member 8 enters and exits so that the spring force acts more inward. In addition, as the entrance when the lock member 8 moves to the lower end portion of the bent elongated hole 7 of the side plate 4a corresponding to the distorted portion 9b, a small mountain-shaped projection 10 is provided below the pivotal side edge of the bent elongated hole 7 of the side plate 4a. In this case, the width of the bent elongated hole 7 is reduced so that the lock member 8 can move over the small mountain-shaped protrusion 10.

Reference numeral 11 denotes a hook-shaped connecting portion formed behind the pivotal connection portion 2 of the hook main body 1. The hook-shaped connecting portion 11a has a bar-shaped curved portion 11a extending at the rear portion of the hook main body 1, and a free end portion 11b of the bar-shaped curved portion 11a.
Is formed close to the rear portion of the hook body 1 to form an open portion 12.

In the above configuration, when the opening / closing member 4 is opened / closed, the lock member 8 is moved to the upper end of the bent slot 7, that is, the upper slot 7 while the opening / closing member 4 is in the closed position.
This is performed while moving to the end of a. Here, since the upper slot 7a is set on an arc line centered on the pivot 5, when the opening / closing member 4 is pressed in the opening direction against the spring 6, the opening / closing member 4 pivots on the pivot 5. Lock member 8
Moves the upper slot 7a of the side plate 4a of the opening / closing member 4, and the opening / closing member 4 is opened as shown by the broken line in FIG.

When the opening / closing member 4 is locked in the closed position, the locking member 8 is moved to the lower end of the bent elongated hole 7, that is, the end of the lower elongated hole 7b while the opening / closing member 4 is in the closed position. Let it. Here, the lock member 8 passes through a distorted portion 9b in which the spring force acts more strongly inwardly of the spring plate, and also has a chevron shape in which the width of the bent elongated hole 7 of the side plate 4a is reduced corresponding to the distorted portion 9b. It moves over the small protrusion 10 and moves to the end of the lower elongated hole 7b of the bent elongated hole 7, and settles in the holding portion 9a formed on the bent spring plate. In this manner, when the lock member 8 is present at the end of the lower elongated hole portion 7b set by gradually changing the distance from the pivot 5, the opening / closing member 4 does not move, and moves to the closed position as shown in FIG. Stays locked. Therefore,
Unless the lock member 8 is manually operated, the opening / closing member 4 does not move.

In the above-described embodiment, the hook-shaped connecting portion 11 is formed integrally with the rear portion of the hook main body 1. However, as shown in FIGS. 5 and 6, the hook-shaped connecting portion 11 is connected to the hook main body 1. The portion 11 is formed as a separate body, and the pivot portion 2 of the hook body 1 is
The connecting shaft 13 may be protruded rearward, and the connecting shaft 13 may be rotatably penetrated to a shaft hole formed in the non-deformable base 11 c formed in the hook-shaped connecting portion 11. With this configuration, the hook body 1 and the hook-shaped connecting portion 1
1 relatively rotates freely, and thus exhibits a untwisting function. Further, in any of the above-described embodiments, the rod-shaped curved portion 11a formed on the hook-shaped connecting portion 11 is hammered from the outside at the free end portion 11b, so that the rod-shaped curved portion 11a is deepened and deformed, The opening 12 can be closed (see FIG. 6).

[0023]

The present invention is embodied in the form described above and has the following effects.

The locking member is moved to one end of the bent-shaped long hole so that the opening and closing member can be freely opened and closed, and is moved to the other end to elastically hold the opening and closing member to close the opening position. As a result, the opening / closing member is prevented from being opened carelessly during use of the annular hook, and the reliability of the closed annular hook is increased.

Further, the lock member is provided in parallel with the pivot, and its movement is held parallel to the pivot by pinching both ends of the lock member with a fingertip, and resists the spring force of the elastic member disposed in the bent elongated hole. Since the movable member cannot be moved unless it is manually operated, the lock member does not move freely during use of the hook by locking the opening / closing member in the closed position, and the safety is high.

The elastic member for elastically holding the lock member at the end of the bent elongated hole is constituted by a thin bent spring plate, and this is inserted into the bent elongated hole of the pivot portion so as to substantially cover the entire surface of the elongated hole. Since the spring member is disposed so as to be in contact with the spring member and the spring force is exerted on the lock member at the end of the bent elongated hole, the structure can be provided simply and inexpensively.

Further, since the hook-shaped connecting portion is formed behind the pivotally attached portion of the hook main body, the hook end portion is connected to the chain end ring so that it can be conveniently used as a simple hook which can be detached freely. is there.

Further, the hook-shaped connecting portion can make the opening portion as a hook closeable, and can be rotatably penetratingly connected to the hook body via a connecting shaft. The twisting and untwisting function is freely performed between them to make the use of the chain connected more convenient.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an annular hook with a stopper according to the present invention.

FIG. 2 is a partial cross-sectional front view showing a state in which the opening and closing member can be opened and closed.

FIG. 3 is a partial cross-sectional front view showing a state in which an opening / closing member is closed and locked in operation.

FIG. 4 is a perspective view of an elastic member.

FIG. 5 is a partial cross-sectional front view showing a state in which the opening and closing member can be opened and closed according to another embodiment.

FIG. 6 is a partial cross-sectional front view showing a state in which the bar-shaped curved portion of the hook-shaped connecting portion is deformed and the opening is closed in the embodiment shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hook main body 2 Pivot part 3 Opening part 4 Opening / closing member 4a Side plate 5 Axis 7 Bending long hole 7a Upper long hole 7b Lower long hole 8 Lock member 9 Elastic member 9a Holding part 9b Distortion part 9c Spring plate both ends 10 Mountain shape Small protrusion 11 Hook-shaped connecting part 11a Bar-shaped curved part 11b Free end part 11c Non-deformable base part 12 Opening part 13 Coupling shaft

Claims (6)

[Claims] An opening / closing member for opening and closing the opening of the hook body is pivotally attached to a pivoting portion formed on the hook body via a pivot, and a side plate formed on the opening / closing member is brought into contact with a surface of the pivoting portion. An open / closed bent hole is provided in each of the side plate and the pivoted portion at the back of the pivot so that the opening / closing member matches at the closed position, and an upper slot extending from the middle of the bent slot to the upper end of the hole. The part is set on an arc line centered on the pivot, and the lower slot is extended from the middle of the bent slot to the lower end of the hole, and the distance to the axis is gradually changed. A rod-shaped lock member parallel to the pivot is movably inserted into the hole, and an elastic member for holding the lock member at the end of the bent elongated hole is disposed in the bent elongated hole of the pivot portion. An annular hook with a locking mechanism. 2. The elastic member is constituted by a thin two-fold bent spring plate almost in contact with the entire surface of the bent elongated hole of the pivot portion, and the upper end of the bent elongated hole has the spring force of the separated ends of the bent spring plate. 2. An annular hook with an opening stop mechanism according to claim 1, wherein the lock member acts in a direction to sandwich the lock member. 3. The lower end of the bent slot has an intermediate portion 2 between the bent spring plates.
The holding portion is formed by rounding the folded portion, and a distorted portion is formed at a portion where the lock member enters and exits from the holding portion, where a spring force acts more inwardly. An annular hook with an opening mechanism as described. 4. A feature in which, when the lock member moves to the lower end portion of the bent elongated hole, a small angle-shaped protruding portion which gets over the spring force of the bent spring plate is provided below the pivot side edge of the bent elongated hole of the side plate. An annular hook with an opening mechanism according to claim 2 or 3. 5. A hook-shaped connecting portion having an open portion is formed behind the pivotally connected portion of the hook body, and the free end of the bar-shaped curved portion formed in the hook-shaped connecting portion is hammered from the outside. The annular hook with an opening prevention mechanism according to claim 1, wherein the bar-shaped curved portion is deformed by deepening the curve so that the open portion can be closed. 6. A hook body and a hook-shaped connecting portion are formed separately, and a connecting shaft protruding toward a rear portion of a pivot portion of the hook body is rotatably connected to an undeformed base formed on the hook-shaped connecting portion. 6. An annular hook with an opening mechanism according to claim 5, wherein the hook is penetrated.