JP2991648B2 - Buckle for safety belt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buckle of a safety belt used when working at a high place in construction work, electric work and the like.

[0002]

A buckle of a safety belt for working at a high place which has been conventionally used is provided with a surplus portion of a belt circling around a waist in a metal frame in a pull-in type or a folded type. In this case, the fixing piece is clamped between a fastening piece that floats in the frame and one side of the frame or the like to fix the length. The safety belt is thus wrapped around the waist of the worker, a rope is tied to a D-ring provided at a predetermined portion of the belt, and a hook provided at the tip of the rope is locked to the structure, so that the safety belt can be used during the work. It was connected with workers to prevent crashes. In recent years, a narrow belt is used instead of a rope, and a belt is wound around a reel attached to a waist belt.

[0003] Wrapping a safety belt using a conventional buckle around the waist when working at a high place does not take much time, but as described above, the buckle that has been adopted for the safety belt is used. There are two types, a retractable type and a folded type. Some workers who wear safety belts for the first time, and those who have obtained a different type of buckle from the past, have mistakenly inserted the extra belt end, When a load was applied to the part, it could come off, leading to an accident.

[0004]

Accordingly, in the present application, the problem is solved by disclosing a buckle in which a tongue plate provided at the other end is inserted and connected to a main body provided at one end of the belt. is there.

[0005]

2. Description of the Related Art Conventionally, articulated buckles are used in a wide variety of applications such as firefighting suits, suitcases, and hanging of light-weight articles. Seat belt buckles, such as those for seats, were typical. These seat belts have a high level of connection strength in order to withstand large G such as at the time of collision of a car, sudden turning of a jet fighter, flowering of a parachute at the time of emergency escape, and the like. However, in any case, considering the necessity of removing the belt and making an emergency evacuation, such a buckle has sufficient connection strength because it is a reasonable method to release the connection of the buckle. In addition, it was designed to be released quickly. For example, in a seat belt for an automobile, even a full harness type belt buckle may be provided with a structure in which, when an accident occurs, all the belts are released by a single operation.

On the other hand, in a safety belt for working at high places, the buckle must not be disconnected during work at high places, and its use has been postponed in the past. However, the problem of incorrect operation as described above,
There is also the trend of the world seeking fashionable equipment,
The demand for safety belts with articulated buckles has increased.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present application, a high-strength connection is possible by a simple operation, the connection state is not released in an unexpected state, and it is easy to release after the work is completed. Disclose a buckle.

[0008] As a representative of the conventionally used articulated buckle, when a seat belt buckle of an automobile is lifted and its mechanism is viewed, the basic structure is such that a tongue plate having a square hole provided at one end of the belt is attached to a belt or the like. When inserted into the main body at the end, the locking member biased by the spring in the main body is temporarily removed by the entry of the tongue plate, and when the square hole is inserted up to the locking member position, it engages with the square hole, The connection state is maintained. Therefore, the connection is easily released by pressing the lock member directly or indirectly against the spring and disengaging the square hole and the lock member. Even if there is a difference in the shape of the square hole of the tongue plate, and whether the lock member rotates about one point as a fulcrum, moves up and down, moves left and right, or performs a complex operation of them And a buckle formed by engagement of the lock member with the square hole and release thereof.

According to the present invention, in order to securely maintain the connected state, the tip of a tongue engaging projection 6 provided on a lock member 7 which rotates upward with the tongue plate insertion opening 4 as a fulcrum is extended to form an eaves-like shape. To form a polymer piece 61, the polymer piece 61
Then, the leading edge 32 of the engagement opening 31 of the tongue plate 3 is brought into contact with the overlap. At the time of this polymerization contact, the tongue plate 3
The distal end is pressed by the contact member 9 in a direction opposite to the entry direction, that is, the engaging edge 31 distal end edge 32 is strongly inserted below the overlapping piece portion 61, and more firm engagement is performed.

At the time of release, the tongue plate 3 is
9 once against the elasticity of
When the engagement with the leading edge 32 is released and the operating piece 71 that is simultaneously connected to the lock member 7 and protrudes to both outsides of the case 10 is pressed down,
The engagement between the lock member 7, that is, the main body 2 and the tongue plate 3 is released. With the above configuration, 2
A buckle for a heavy safety belt can be obtained.

The engagement between the tongue engaging projections 6 of the lock member 7 and the tongue plate 3 ensures the strength, and the engagement between the overlapping piece portion 61 and the front edge 32 of the engagement opening 31 ensures the lock member 7.
That is, the movement of the operation piece 71 is restricted. During use of the safety belt at a high place, it is conceivable that the operation piece 71 is pushed down against the user's will. For example, if an object is picked up, being pushed by it remains a possibility. Even in such a case, the overlapping piece 61 and the tongue plate 3
The engagement of the leading edge 32 of the engagement opening 31 is pressed and secured by the contact member 9, the operation piece 71 does not move, and the lock member 7 cannot rotate in the release direction.

Further, the fact that the operation piece 71 cannot be pushed down unless the tongue plate 3 is further pushed in than in the normal connected state means that the belt 1 is not moved down in use, so that the operation piece 71 is conscious to some extent. Since it is wound around the waist and abdominal pressure is applied, pressing the tongue plate 3 in the direction to further tighten it is naturally an operation that the worker performs with consciousness It is unlikely that such an effect would occur by chance. As described above, it can be said that the basic structure and appearance of the conventional buckle are similar to those of a conventional seatbelt-like buckle and have a sufficient function for a safety belt.

[0013]

An embodiment of the present invention will be described. First, the tongue plate 3 is punched from a high-strength steel plate, and a belt insertion opening is provided at the base end, and a rectangular engagement opening 31 is provided at a position where a predetermined length is inserted from the narrowed end. The engagement opening 31 has a size capable of accommodating at least a half of the distal end portion of the tongue engagement projection 6 of the lock member 7 described later. The main body 2 is also punched out of a high-tensile steel plate, is narrower than the belt insertion port provided at the base end, and the front end is bent inward from both sides to accommodate the lock member 7, In addition, in order to use as a slide guide on the upper surface when the tongue plate 3 is inserted, it is formed widely. The leading end is narrowed again, and a notch is provided vertically in the center. The two parts are folded back in a V shape toward the inside, and the base of the lock member 7 is received at the bottom of the V valley. A leaf spring 5 is set in the groove. The upper limit of the rotation of the lock member 7, which is turned upward by the leaf spring 5, is set by the lock member contact piece 12. The lock member abutting piece 12 has a substantially U-shaped cross section separately formed on a plate between the lock member 7 and the belt insertion opening.
The contact member support member 11 in the shape of a letter is fixed, and is provided so as to protrude near its tip.

The lock member 7 has at one end an operation piece 71 projecting symmetrically to both sides, and at the other end a hole for mounting the leaf spring 5.
72, and the tongue engaging projection 6 is bulged at the intermediate portion. It is the two operation pieces 71 that limit the rotation of the lock member 7 by contacting the lock member contact piece 12 described above.

The tongue engaging projection 6 is formed by forming a substantially H-shaped notch groove near the operation piece, and swelling the lower end of the notch groove toward the mounting hole 72 of the leaf spring 5 so as to become gradually lower. An eaves-shaped overlapping piece 61 is provided at the tip, which is the top of the stack. At the bottom of the contact member support member 11, a contact member 9 urged by a spring 8, which is turned in the direction of the lock member 7, is provided so as to bridge both sides. The abutting member 9 has a protrusion that limits the rotation of itself, does not contact the lock member 7 when the tongue plate 3 is not inserted, and allows the lock member 7 to rotate freely. is there. When the tongue plate 3 enters from the tongue plate insertion port, it comes into contact with the contact material 9 and
When the leading edge 32 of the engagement opening 31 of the tongue plate 3 exceeds the overlapping piece 61 of the tongue engagement projection 6, the locking member 7 is rotated.
Is rotated upward by the leaf spring 5 and released from the tongue plate 3, the engagement edge 31 of the leading edge 32 and the overlapping piece 61 are engaged, and the contact member 9 is held so as to maintain the engaged state. By pressing the tongue plate 3, the two are securely engaged. In order to release this engagement state, the tongue plate 3 is pushed in more than the length of the overlapping piece portion 61 against the elasticity of the contact member 9, and the engagement between the leading edge 32 of the engaging opening 31 and the overlapping piece portion 61 is performed. When the operation piece 71 is pushed down at the position where the mating is released, the tongue plate 3
Can be removed.

The above structure is covered with a resin cover to prevent rust and to prevent malfunction due to entry of small pieces. However,
The slit for moving the operation piece 71 of the lock member 7 and the tongue plate insertion opening are open, and the operation piece 71 also protrudes to both outer sides.

FIGS. 6 to 9 show a second embodiment of the present invention, in which the contact member 9 is of a sliding type, and a spring 81 is arranged to press the contact member 9. The support piece 13 of the spring 81 is provided upright at the end of the material support member 11, but the operation and effect are the same.

FIG. 12 shows a third embodiment of the present invention. As in the second embodiment, the contact member 9 is of a front-rear slide type, and a portion corresponding to the contact member support member 11 is a resin cover. 14
Thus, the configuration is provided on the case 10 side, but the operation and effect are equivalent.

[0019]

As described above, by using the present invention, it is possible to obtain a buckle which can be easily connected, has no unexpected detachment during connection, and can be separated by a simple operation even when the connection is released. Things. Due to the double safety device with different operating directions, there is no unintentional disconnection by any action during the connection. This is due to the need to operate in the direction to further tighten the belt fastened to the waist at the time of release, so that it was released, it was designed that it can not be released unless it is a conscious operation It can be said that this is not only a double safety device but also a triple safety system that adds the user's will.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of the present invention with a part cut away.

FIG. 2 is a right side view of the first embodiment of the present invention with a part cut away.

FIG. 3 is a bottom view of the first embodiment of the present invention with a part cut away.

FIG. 4 is a sectional view showing a fitted state of the first embodiment of the present invention.

FIG. 5 is a front view of a fitted state of the first embodiment of the present application.

FIG. 6 is a front view of a second embodiment of the present invention, with a portion cut away.

FIG. 7 is a right side view of the second embodiment of the present invention with a part cut away.

FIG. 8 is a bottom view of the second embodiment of the present invention, with a portion cut away.

FIG. 9 is a sectional view showing a fitted state of the second embodiment of the present application.

FIG. 10 is a perspective view of the present application.

FIG. 11 is an exploded perspective view of the first embodiment of the present application.

FIG. 12 is an exploded perspective view of a case according to a third embodiment of the present application.

FIG. 13 is a front view of a safety belt using the buckle of the present application.

[Explanation of symbols]

 1 Belt 2 Main body 3 Tongue plate 4 Insertion opening 5 Spring 6 Tongue engagement projection 7 Lock member 8 Spring 9 Contact material 10 Case 11 Contact material support material 12 Lock member contact piece 13 Support piece 31 Engagement opening 32 Front edge 61 Overlap piece 71 Operation piece 72 Hole 81 Spring

Claims (1)

(57) [Claims] A main body fixed to one end of a belt;
The tongue plate 3 is provided at the other end and is inserted into and engaged with the main body 2. With the tongue plate insertion opening 4 as a fulcrum, the main body 2 is constantly urged upward by a spring 5 to rotate the tongue. A lock member 7 having a projection 6 and a tongue plate which is located at the tip of the lock member 7 and enters
3 is provided with a contact material 9 provided with a spring 8 in a direction to push out, and the leading end of the tongue engaging projection 6 rides on the leading edge 32 of the engaging opening 31 provided in the tongue plate 3 to polymerize for a predetermined length. When the engagement between the main body 2 and the tongue plate 3 is released, the tongue plate
3 is further pushed in to disengage with the overlapping piece 61, and then the operating piece 71 formed by the extension of the lock member 7 protruding to both sides outside the case 10 is pushed down to engage with the tongue engaging projection 6. A buckle for a safety belt, characterized by a configuration to unravel.