JP3136443U - Safety belt buckle for work at height - Google Patents

Abstract

[PROBLEMS] To reduce the manufacturing cost while ensuring safety and reducing the number of parts to make a buckle of a safety belt for working at high places more compact and light.
A buckle body (1) includes a latch (10) that engages with an engagement hole (4) of a tongue plate (2), a second position that disengages from the engagement hole, and a latch that is always in a first position. A leaf spring 13 that urges toward the end, an operation lever 14 that moves the latch in the first position to the second position, and a lock mechanism that locks the operation lever so that the latch remains in the first position. Is provided. The operating lever has an operating portion 14b that rotates around a shaft 14d extending in the width direction of the buckle body and engages with a latch. The lock mechanism moves in the width direction of the buckle body, locks the operation lever to a position corresponding to the first position of the latch, a stop member 15 that takes the lock release position, and sets the stop member to the lock position at all times. It consists of a spring 16 that biases toward it.
[Selection] Figure 2

Description

  The present invention relates to a safety belt used at a high work site such as a construction site, and more particularly, to a buckle attached to a trunk belt thereof.

  Examples of conventional safety bands for working at high places include those described in Japanese Patent No. 3434314 and Japanese Patent No. 3462606. The safety belt for working at heights is intended for safety of workers at work sites at heights, including a torso belt for wearing on the operator, a lifeline with one end fixed to the torso belt, and the other end of the lifeline. It consists of a fixed hook.

  Then, while the torso belt is mounted on the operator's torso, the hook is engaged with an appropriate fixed object, and if the operator should fall, the operator can fix the fixed object through the hook, lifeline, and torso belt. Safety is ensured by being supported in a suspended state. The buckle consists of a buckle body attached to one end of the torso belt and a tongue-like member attached to the other end of the torso belt. The torso belt is wrapped around the torso of the operator, and a tongue plate is inserted into the buckle body. By joining, the safety belt is attached to the worker.

  This type of buckle is equipped with a mechanism that locks the tongue plate in a state where it is joined to the buckle body from the viewpoint of ensuring safety, so that the tongue plate cannot be easily removed from the buckle body unless the lock is released. Yes. In order to prevent the lock mechanism from being inadvertently released, the structure of the buckle has been complicated.

  For this reason, the number of parts constituting the buckle is considerably large, and there is a problem that the parts cost and the assembly cost increase. Furthermore, there is a problem that the buckle becomes large and heavy, which becomes an obstacle during work at an aerial work site.

  Therefore, the problem of the present invention is to prevent the lock mechanism from being inadvertently released and to secure sufficient strength, while reducing the number of parts and making the buckle of the safety belt for working at high places more compact and lighter. The purpose is to reduce this.

  In order to solve the above-mentioned problems, the present invention provides a tongue plate attached to one end of a waist belt of a safety belt for working at high places, and a tongue plate attached to the other end of the waist belt, and an insertion port of the tongue plate is connected to a tip portion. The tongue plate is formed with an engagement hole, and the buckle body is engaged with the engagement hole of the tongue plate inserted into the insertion port. A latch that takes a position of 1 and a second position that disengages from the engagement hole, a spring member that constantly biases the latch toward the first position, and a latch that is in the first position. Work at height, provided with an operation lever that moves to the second position against the biasing force of the spring member, and a lock mechanism that locks the operation lever so that the latch stays in the first position For safety belt buckle The operation lever is attached to the buckle body, and is rotatable about an axis extending in the width direction of the buckle body in response to the latch taking the first and second positions. The locking mechanism is guided so as to be movable along the width direction of the buckle body, and the operation lever corresponds to the first position of the latch. A locking member that is locked between a locking position, a locking member that is movable between a locking release position that allows rotation of the operating lever, and a second spring that constantly biases the locking member toward the locking position. A buckle of a safety belt for working at high places, which is characterized by comprising a member.

  In the above configuration, preferably, the buckle body includes a base and a cover that are coupled to each other, and the latch includes a protrusion corresponding to the engagement hole of the tongue plate, and is rotatable to the base at one end edge. The spring member is arranged between one end side of the latch and the base. The first position and the second position can be taken within the rotation range. The operation lever has an L-shaped cross section, and includes a rod-shaped protrusion provided on both sides of one end, an operating part engaged with the latch provided on the other end, and an inner part of the operating part. A locking projection provided on a side surface and an operation surface provided on the outer side surface of the one end side, and the operation lever is accommodated in an opening formed in a rear end portion of the cover, It is pivotally supported by the cover at the protrusion. When the operation surface is in the same plane as the cover surface, the operation lever is in a position corresponding to the first position of the latch, When the surface is pushed into the opening by the user's finger, the operation lever is rotated to move the latch at the first position to the second position.

  Further, the restraining member of the locking mechanism has an elongated shape, is attached to the inside of the cover, and is guided so as to be movable along the width direction of the buckle body, and the restraining member is provided on one end side. And when the operation lever is in a position corresponding to the first position of the latch, the restraining member is the second operation surface. The operating surface is in the same plane as the second opening formed on the side surface of the cover, and the main body of the restraining member engages with the locking protrusion of the operating lever to take the locking position, When the second operation surface is pushed into the second opening by the user's finger and aligned with the stepped portion of the restraining member 15 and the locking projection of the operation lever, the unlocking position is taken. And said lock It said second spring member structure, the disposed between the other end of the restraining member and the cover, it is preferable that has a spring which urges the braking members constantly the locked position.

  According to the present invention, the number of parts constituting the buckle of the safety belt for working at high places can be greatly reduced, thereby making the buckle structure simple and compact and reducing the weight of the buckle. As a result, the manufacturing cost of the buckle can be greatly reduced.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a trunk belt of a safety belt for working at a high place to which a buckle according to the present invention is attached, and FIG. 2 is an exploded perspective view of the buckle of FIG. FIG. 3 is a series of perspective views of the buckle body of FIG. 1 as viewed from the inside of the cover, and is a diagram for explaining the relationship between the operation lever and the lock mechanism.
Referring to FIG. 1, a buckle according to the present invention includes a tongue plate 2 attached to one end of a waist belt 3 of a safety belt for working at high places, and a box-type buckle body 1 attached to the other end of the waist belt 3. It is made up of. Although not shown, one end of a lifeline is fixed to the body belt 3, and a hook is fixed to the other end of the lifeline.

  Next, referring to FIG. 2, an engagement hole 4 is formed in the tongue plate 2. The buckle body 1 includes a cover 5, a base 6 and a back plate 7, and the cover 5, the base 6 and the back plate 7 are fixed by a set screw 8. The base 6 is attached to the other end of the body belt 3, and an insertion port 9 for inserting the tongue plate 2 is formed at the tip of the cover 5.

  Walls 12 and 17 are formed at the tip and both sides of the base 6, respectively. The wall 12 at the tip of the base 6 has an inwardly curved semi-cylindrical cross section, and the walls 17 on both sides of the base 6 have an inverted L-shaped cross section. The wall 12 is formed lower than the wall 17, and the tongue plate 2 inserted from the insertion port 9 of the cover 5 guides in the gap between the upper surface of the wall 12 and the lower surface of the horizontal portion of the wall 17. The tongue plate 2 is inserted until the tip of the tongue plate 2 comes into contact with the receiving member 18.

  The base 6 is provided with a latch 10. The latch 10 includes a protrusion 11 having a size corresponding to the engagement hole 4 of the tongue plate 2, one end abuts against the inner surface of the wall 12 of the base 6, and can rotate around the end edge of the one end. It has become. In this rotation range, the latch 10 is engaged with the engagement hole 4 of the tongue plate 2 by the protrusion 11 and is separated from the engagement hole 4 of the tongue plate 2. Can be taken. Further, the one piece 13a side of the leaf spring 13 having a V-shaped cross section is coupled to the latch 10 and the other piece side 13b is fixed to the base 16. The latch 10 is supported by the leaf spring 13 and always has the first position. It is elastically biased to take.

  2 and 3, the buckle body 1 is also provided with an operation lever 14 that moves the latch 10 in the first position to the second position against the urging force of the leaf spring 13. . The operation lever 14 has an L-shaped cross section, and has rod-shaped protrusions 14d on both sides of one end and an operating portion 14b that engages the latch 10 on the other end. The operating lever 14 further has a locking projection 14c provided on the inner surface of the operating portion 14b.

  The operation lever 14 is accommodated in an opening 5a formed at the rear end of the cover 5, and is pivotally supported by the cover 5 at a bar-shaped protrusion 14d, so that the latch 10 can take the first and second positions. Thus, the buckle body 1 is rotatable around the axis of the rod-shaped protrusion 14d extending in the width direction. An operation surface 14 a is provided on one end side of the operation lever 14. When the operation surface 14a is in the same plane as the cover 5 surface, the operation lever 14 is in a position corresponding to the first position of the latch 10, and the operation surface 14a is moved into the opening 5a by the user's finger. By being pushed in, the operation lever 14 rotates to move the latch 10 in the first position to the second position.

  2 and 3, the buckle body 1 is provided with a lock mechanism that locks the operation lever 14 so that the latch 10 remains in the first position. The lock mechanism has an elongated restraining member 15 attached to the inside of the cover 5 and guided so as to be movable along the width direction of the buckle body 1. The restraining member 15 has an operation surface 15b on one end side and a step portion 15a on the center.

When the operation lever 14 is in a position corresponding to the first position of the latch 10, the restraining member 15 has its operation surface 15 b in the same plane as the opening 5 b formed on the side surface of the cover 5 and is restrained. The main body of the member 15 engages with the locking projection 14c of the operation lever 14 to take a lock position where the operation lever 14 is locked (see FIG. 3A). Further, when the operation surface 15b of the stop member 15 is pushed into the opening 5b by the user's finger, the step 15a of the stop member 15 and the locking projection 14c of the operation lever 14 are aligned (see FIG. 3B). The restraining member 15 takes a lock release position that allows the operation lever 14 to rotate (see FIG. 3C).
The lock mechanism further includes a spring 16 that is disposed between the other end of the stop member 15 and the cover 5 and urges the stop member 15 toward the lock position at all times.

  Next, a method for operating the buckle according to the present invention will be described. FIG. 4 is a diagram for explaining the connection and separation operation between the buckle body and the tongue plate of the buckle of FIG. 1. For the sake of clarity, FIG. 4 illustrates the operations of the tongue plate, the latch, and the operation lever, and details of other components are omitted.

  First, referring to FIG. 4A, in a state where the tongue plate 2 is not inserted into the buckle body 1, the latch 10 is in the first position, the operation lever 14 is in the corresponding position, and is latched in the operating portion 14b. 10 is engaged. The operation lever 14 is locked at this position by a lock mechanism.

  When the safety belt for working at high altitude is attached to the user, the torso belt 3 is wound around the torso of the user, and the tongue plate 2 is inserted into the insertion port 9 of the buckle body 1 as shown in FIG. 4B. The In this case, as the tongue plate 2 is introduced into the buckle body 1 from the insertion port 9, the latch 10 is once pushed down slightly from the first position. However, as shown in FIG. When the protrusion 11 of the latch 10 is in contact with the member 18 and aligned with the engagement hole 4 of the tongue plate 2, the protrusion 11 protrudes into the path of the tongue plate 2 and engages with the engagement hole 4. 10 takes the first position.

  Thus, the tongue plate 2 is coupled to the buckle body 1 and the torso belt 3 is attached to the user's torso. At this time, since the operation lever 14 is locked by the lock mechanism (see FIG. 3A), the operation lever 14 is not carelessly operated and the engagement state between the latch 10 and the tongue plate 2 is not released. Person can work safely.

  When the safety work belt for high-altitude work is removed from the user, the operation surface 15b of the locking member 15 of the lock mechanism is pushed by the user's finger to unlock the operation lever 14 (see FIG. 3B). The operating surface 14a of the operating lever 14 is pushed by the user's finger, whereby the operating lever 14 rotates around the rod-shaped protrusion 14d as shown in FIG. 4D, and the latch 10 operates the operating lever 14. The part 14b is moved from the first position to the second position. At this time, the tongue plate 2 is restrained by the upper surface of the receiving member 18 and does not follow the rotation of the latch, and the protrusion 11 of the latch 10 is easily detached from the engagement hole 4 of the tongue plate 2. Thus, the engagement between the tongue plate 2 and the latch 10 is released, and the tongue plate 2 is extracted from the buckle body 1.

  When the user's finger is released from the operation surface 14a of the operation lever 14 after being pulled out of the tongue plate 2 from the buckle body 1, the operation lever 14 has the latch 10 attached to the leaf spring 13 as shown in FIG. 4A. As the force returns to the first position, it rotates to return to the original position (see FIG. 4A). Further, the user's finger is separated from the operation surface 15b of the restraining member 15, and the restraining member 15 returns to the locked position by the urging force of the spring 16 (see FIG. 3A).

  FIG. 5 is an exploded perspective view of another embodiment of the present invention. The embodiment shown in FIG. 5 differs from the embodiment shown in FIGS. 1 to 4 only in the configuration of the operation lever and the lock mechanism. Therefore, in FIG. 5, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 5, in this embodiment, the operation lever 14 ′ has an operation block 14 a ′ having a wedge-shaped cross section and rod-shaped protrusions 14 d ′ formed on both sides of the operation block 14 a ′. The operation lever 14 ′ is arranged so that the operation block 14 a ′ protrudes from an opening 5 a ′ formed on the upper surface of the cover 5. The operation lever 14 ′ is pivotally supported by the cover 5 at the rod-shaped protrusion 14 d ′. Corresponding to the second position, it can be rotated around the axis of the rod-shaped protrusion 14d ′. When the operation block 14a ′ is in the position that protrudes most from the opening 5a ′, the operation lever 14 ′ is in a position corresponding to the first position of the latch 10, and the operation block 14 ′ is moved by the user's finger. By being pushed into the opening 5a ′, the operation lever 14 ′ is rotated to move the latch 10 at the first position to the second position.

  In this embodiment, the lock mechanism has an elongated plate-like restraining member 15 ′ attached inside the cover 5 and guided so as to be movable along the width direction of the buckle body 1. The restraining member 15 'has an operation projection 15b' on one side and a restraining projection 15a 'on the other side. The operation protrusion 15b 'is exposed from the opening 5b' formed at the rear end of the cover 5, and can move in the opening 5b 'as the stop member 15' moves.

When the operation lever 14 'is at a position corresponding to the first position of the latch 10, the restraining member 15' has its operation projection 15b 'on one end of the opening 5b' and the stop projection 15a 'is operated. The locking position for locking the operation lever 14 ′ is achieved by contacting the locking projection 14c ′ of the lever 14 ′. Further, the operation protrusion 15b ′ of the stop member 15 ′ is moved to the other end side of the opening 5b ′ by the user's finger, so that the stop protrusion 15a ′ of the stop member 15 ′ and the locking protrusion of the operation lever 14 ′. 14c 'leaves | separates and the stop member 15' takes the lock release position which accept | permits rotation of the operation lever 14 '.
The lock mechanism further includes a spring 16 that is disposed between one end of the stop member 15 ′ and the cover 5 and constantly biases the stop member 15 ′ toward the lock position.

It is a perspective view of the trunk belt of the safety belt for work in high places where the buckle by this invention was attached. It is a disassembled perspective view of the buckle of FIG. FIG. 2 is a series of perspective views of the buckle body of FIG. 1 as viewed from the inside of the cover, and is a diagram illustrating a relationship between an operation lever and a lock mechanism. It is a figure explaining connection and isolation | separation operation | movement with the buckle main body and tongue plate of the buckle of FIG. It is a disassembled perspective view of another Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Buckle main body 2 Tongue plate 3 Trunk belt 4 Engagement hole 5 Cover 5a, 5b Opening 6 Base 7 Back plate 8 Set screw 9 Insert 10 Latch 11 Projection part 12 Wall 13 Leaf spring 14 Operation lever 14a Operation surface 14b Operation part 14c Locking projection 14d Bar-shaped projection 15 Stopping member 15a Stepped portion 15b Operation surface 16 Spring 17 Wall 18 Receiving member

Claims (3)

It consists of a tongue plate attached to one end of the waist belt of the safety belt for working at high places, and a box-shaped buckle body attached to the other end of the waist belt and having an insertion port for the tongue plate at the tip. The tongue plate is formed with an engagement hole, and the buckle body is disengaged from the engagement hole at a first position to be engaged with the engagement hole of the tongue plate inserted into the insertion port. A latch that takes a second position, a spring member that constantly biases the latch toward the first position, and the latch that is in the first position against the biasing force of the spring member. In a buckle of a safety belt for working at high places provided with an operation lever that is moved to a position 2 and a lock mechanism that locks the operation lever so that the latch stays in the first position.
The operation lever is attached to the buckle body, and is rotatable about an axis extending in the width direction of the buckle body in response to the latch taking the first and second positions. An actuating portion engaging the latch;
The lock mechanism is guided so as to be movable along the width direction of the buckle body, and locks the operation lever at a position corresponding to the first position of the latch, and rotates the operation lever. A work at a high place, comprising: a restraining member that is movable between an allowable unlocking position; and a second spring member that constantly biases the restraining member toward the locking position. Safety belt buckle.   The buckle body has a base and a cover coupled to each other, and the latch includes a protrusion corresponding to the engagement hole of the tongue plate, and is pivotally supported by the base at one end edge so as to rotate. The first position and the second position can be taken within a movement range, and the spring member is a leaf spring disposed between one end side of the latch and the base, and The lever has an L-shaped cross section, has a rod-shaped protrusion provided on both sides of one end, an operating portion that engages with the latch provided on the other end, and a latch provided on the inner surface of the operating portion. A protrusion and an operation surface provided on the outer surface on the one end side, wherein the operation lever is accommodated in an opening formed in a rear end portion of the cover, and the rod-shaped protrusion is pivotally supported on the cover. Can be rotated around the axis of the rod-shaped protrusion When the operation surface is in the same plane as the cover surface, the operation lever is in a position corresponding to the first position of the latch, and the operation surface is in the opening by a user's finger. 2. The high place according to claim 1, wherein the operating lever rotates by being pushed into the first position, and the latch in the first position is moved to the second position. 3. Work safety belt buckle.   The restraining member of the locking mechanism has an elongated shape, is attached to the inside of the cover, is guided to be movable along the width direction of the buckle body, and the restraining member is provided on one end side. 2 operation surfaces and a step portion provided at the center, and when the operation lever is at a position corresponding to the first position of the latch, the restraining member is the second operation surface. Is in the same plane as the second opening formed in the side surface of the cover, and the main body of the restraining member engages with the locking projection of the operation lever to take the locking position, while the second opening When the operation surface is pushed into the second opening by a user's finger and aligned with the stepped portion of the restraining member 15 and the locking projection of the operation lever, the unlocking position is taken. In front of the locking mechanism The second spring member is a spring that is disposed between the other end of the restraining member and the cover, and constantly biases the restraining member toward the lock position. The safety belt buckle for high-altitude work described in 2.

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