JPH09242740A - Hook of safety belt for elevated spot work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guarantee safety of an operator by preventing a hook from falling off from a nail by sideslipping in the lengthwise direction of a foot hooking nail even if the operator misses his footing at an electric pole work site. SOLUTION: A closing member 5 is rotatably connected to a base part 2 to a hook main body 1 by a rivet 6. The closing member 5 takes a closing position to close a U-shaped curved part 1b of the hook main body and an opening position to open it. The engaging edge 8 which is formed so that a distance from the rivet 6 gradually reduces in the direction for proceeding to the tip of the U-shaped curved part of the hook main body 1 and is pressed against a foot hooking nail 4 to engage with the hook main body 1 when the closing member 5 is put in the closing position, is formed in the closing member 5. The closing member 5 is always energized toward the closing position by a spring 17. A claw 18 is formed on the inside edge of the U-shaped curved part.

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 for working in high places, and more particularly to a safety belt hook used at a utility pole work site.

[0002]

2. Description of the Related Art Conventionally, a safety belt for working at a high place has been used in the field of utility pole work to ensure the safety of workers. In this aerial work safety belt, the hook is fixed to the tip of the lifeline, the hook and the torso belt are connected by the lifeline, and the torso belt is attached to the body of the worker.

This hook has a hook-shaped main body and a stopper which is attached to the base of the main body and rotates between a closed position and an open position. In the closed position, the stopper faces the tip of the main body. In the open position, the stopper is pushed into the main body to open between the base and the tip of the main body. Further, a lock mechanism that can lock the stopper in the closed position is provided. Then, after the main body is hooked on the foot hook at the open position of the stopper, the hook is engaged with the foot hook by rotating and locking the stopper to the closed position.

In this way, as shown in FIG. 4, the worker wearing the torso belt 40 engages the hook 42 with the appropriate foot hook 41, and after climbing the utility pole 43 to a certain height,
Remove the hook 42 once, and then use the next suitable foot hook 41.
The operation of engaging the hook 42 with the power pole 43 and climbing the utility pole 43 to a certain height is repeated, and when climbing to a predetermined position on the upper part of the utility pole, the hook 42 is also engaged with a suitable foot hook at this time. I do. After the work is completed, as in the case of climbing the utility pole 43, the hooks 42 are sequentially engaged with the appropriate foot hooks 41, and the utility pole 43 is dismounted while being removed. Even if the worker steps off the foot, the worker is supported by the foot-hooking nail 41 through the hook 42, the lifeline 44 and the trunk belt 40, and is prevented from falling.

In this case, as shown in FIG. 5, foot hooks have various diameters and cross-sectional shapes, and the hooks must be adapted to all of these foot hooks. Therefore, in the conventional hook 42, the hook 4
The main body 45 and the stopper 46 surround the footholding nail 41 with play when the footrest nail 2 is engaged with the footholding nail 41. Therefore, when the hook 42 is engaged with the foot hook 41, the hook 42 does not fall off in the radial direction of the foot hook 41, but can easily move in the length direction of the foot hook 41.
If the diameter of the hook is relatively small, the hook 42 may fall off the head of the foot hook 41. On the other hand, in the unlikely event that the worker falls, the worker is swung like a pendulum around the hook 42 that engages with the hook 41 of the telephone pole 43. As a result, the hook 42 slides along the foot-hooking nail 41 in the length direction of the nail, and the hook 42 jumps outward from the head of the foot-hooking nail 41 and falls off, which may not ensure the safety of the operator.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to remove a foot from a nail by slipping the hook sideways in the length direction of the nail on the utility pole even if the operator steps off the foot at the pole utility site. This is to ensure that the safety of workers is sufficiently secured.

[0007]

In order to solve such a problem, the present invention provides a straight line portion and a U extending from the straight line portion.
A hook body that is composed of a U-shaped curved portion, a base portion of the straight portion is fixed to a tip of a lifeline of a safety belt for working at high places, and a hook body that engages with a foot hook by the U-shaped curved portion; and a base portion of the hook body. A rotation shaft attached to the hook body, and is rotatably mounted around the rotation shaft, and rotates from the position of the linear portion of the hook body toward the tip of the U-shaped curved portion. A closing member for closing the U-shaped curved portion of the hook body, and a closing member formed on the closing member so that the distance from the rotating shaft gradually decreases along the direction toward the tip of the U-shaped curved portion of the hook body. When the closing member is in its closed position, it is arranged between the closing member and the hook body and an engaging edge pressed against the foot hook that engages the hook body, and keeps the closing member at all times. The closed position A safety belt for working in high places, comprising: a spring for urging the hook body toward at least one side; and at least one claw formed on an inner edge of the U-shaped curved portion of the hook body and engaging with the foot hook. It is a configuration of the hook.

With the above construction, when the safety belt for high places is used, the hook closing member is pushed by the operator's hand from the closed position toward the straight portion of the hook main body against the biasing force of the spring. It is pushed in and rotated to the open position where the U-shaped curved portion of the hook body is opened. Then, the U-shaped curved portion is hooked on the foot hook. After that, the closing member is rotated to the closed position by the biasing force of the spring. In the closed position, the engagement edge of the closure member is pressed against the foot hook. At the same time, the hook body U
The claw of the character-shaped curved portion engages with the foot hook. Thus,
The hook securely engages the footrest nail, thus preventing the hook from skidding in the lengthwise direction of the footrest nail.

At this time, the engaging edge of the closing member is formed so that the distance from the rotation axis of the closing member gradually decreases along the direction toward the tip of the U-shaped curved portion of the hook body. In the closed position of the closing member, the distance between the inner edge of the U-shaped curved portion of the hook body and the engaging edge of the closing member may change depending on the rotation angle of the closing member. As a result, even if the diameter of the foot hook is large or small, the closing member reliably engages the foot hook at the closed position at the angular position according to the diameter of the foot hook.

Preferably, the hook of the safety belt for high places work according to the present invention further comprises a locking means for locking the closing member at a plurality of angular positions in the closing position of the closing member, and the locking means. Is a locking pin that is provided so as to project from the closing member and that is arranged parallel to the rotating shaft,
A second rotating shaft attached to a linear portion of the hook body and arranged in parallel with the rotating shaft; and a lock member rotatably attached around the second rotating shaft, It is formed on the lock member, and the locking pin is fitted into it,
A slot having a shape that absorbs the rotational movement of the closing member, and two or more recesses formed at one side edge of the slot to accommodate the locking pin at each of the plurality of angular positions of the closing member. The spring further urges the locking member in a direction in which the recess of the slot is pressed against the locking pin.

Alternatively, the hook of the safety belt for high places work according to the present invention further comprises:
The locking member includes locking means for locking the closing member at a plurality of angular positions, the locking means protruding from a straight portion of the hook body, the locking pin being arranged in parallel with the rotating shaft, and the closing means. A second rotating shaft attached to the member and arranged parallel to the rotating shaft; a lock member rotatably attached around the second rotating shaft; and a lock member formed on the lock member. , A slot having a shape for absorbing the rotational movement of the closing member, into which the locking pin is fitted, and the locking formed at one side edge of the slot at each of the plurality of angular positions of the closing member A second recess disposed between the closure member and the locking member and two or more recesses for receiving the pins, and biasing the locking member in a direction in which the recess of the slot is pressed against the locking pin. spring It is provided.

Due to such locking means, the closing member is
At its closed position, it is locked at a plurality of angular positions depending on the size of the foot hook. As a result, it is reliably prevented that the closing member suddenly rotates to the open position and opens the U-shaped curved portion of the hook body.

[0013]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view showing one embodiment of a hook for a safety belt for working at high places according to the present invention. FIG. 1A shows a state in which the hook is engaged with a foot hook having a large diameter, and FIG. , (C) shows a state in which the hook is engaged with a foot hook having a small diameter, and (C) shows a state in which the closing member of the hook is in the open position.
FIG. 2 is an exploded perspective view of the hook shown in FIG.

As shown in FIGS. 1 and 2, the hook of the safety belt for working at high places according to the present invention comprises a hook body 1 having a straight portion 1a and a U-shaped curved portion 1b extending from the straight portion 1a. I have it. The base portion 2 of the straight portion 1a of the hook body 1 is provided with the tip 3 of the lifeline of the safety belt for working at high places.
Is fixed to the foot and is hooked by the U-shaped curved portion 1b.
Is adapted to be engaged.

Although not shown, the lifeline is wound on a take-up reel, the take-up reel is attached to the trunk belt, and the trunk belt is attached to the body of an operator. .

A closing member 5 is attached to the base portion 2 of the hook body 1. As shown in FIG. 2, the closure member 5
Arranges two L-shaped metal plates in parallel with each other so that their one side faces face each other, and connects the L-shaped vertical legs to each other in the vicinity of the L-shaped connecting portion. It consists of The tip of the L-shaped vertical leg 5a of the closing member 5 is connected to the base 2 of the hook main body 1 by the rivet 6 with the hook main body 1 sandwiched between both walls of the rivet 6. It can be rotated around.

In this way, the closing member 5 rotates from the position of the linear portion 1a of the hook body 1 toward the tip 7 of the U-shaped curved portion 1b to close the U-shaped curved portion 1b (see FIG. (See A) and (B)) and the hook body 1 from the closed position.
Of the U-shaped curved portion 1b.
The open position (see FIG. 1 (C)) is opened. At this time, the hook body 1 is inserted between both walls of the closing member 5 so that the rotational movement of the closing member 5 is not hindered.

As shown in FIGS. 1A and 1B,
When the closing member 5 is in the closed position, the L-shaped longitudinal leg 5a of the closing member 5 extends towards the tip 7 of the U-shaped curved portion 1b of the hook body 1 and the tip 7 of the hook body 1 is closed. The L-shaped lateral leg 5b of the closure member 5 is inserted between both walls of the member 4 and extends towards the straight portion 1a of the hook body 1 between which the straight portion 1a is inserted. To be done.

In the closed position, the L-shaped lateral leg 5b of the closing member 5 closes the opening of the U-shaped curved portion 1b of the hook body 1 and at the same time the L-shaped lateral portion of the closing member 5. The engaging edge 8 of the leg 5b is adapted to be pressed against the foot hook 4 which engages with the U-shaped curved portion 1b of the hook body 1.

At this time, the engaging edge 8 of the closing member 5 is
Rivet 6 along the direction toward the tip 7 of the hook body 1.
Since the distance from is gradually decreased, the inner edge of the U-shaped curved portion 1b of the hook body 1 and the closing member 5 are closed at the closing position of the closing member 5 depending on the rotation angle of the closing member 5. The distance from the engagement edge 8 may change. as a result,
Even if the diameter of the foot hanging nail 4 is large or small, the closing member 5 is in the closed position at an angular position according to the diameter of the foot hanging nail 4,
The engagement edge 8 ensures engagement with the foot hook. In addition, in order to engage the foot hook 4 more reliably, the engagement edge 8 may be formed with continuous teeth in the length direction thereof.

As shown in FIG. 1C, in the open position,
The hook body 1 is inserted between both walls of the L-shaped vertical leg 5a of the closing member 5, and the L-shaped vertical leg 5a is inserted into the hook body 1.
, And the U-shaped curved portion 1b of the hook body 1 is open.

The hook for a safety belt for high places work according to the present invention further comprises locking means for locking the closing member 5 at a plurality of angular positions in its closed position. The locking means, as shown in FIG.
It has a locking pin 9 arranged in parallel with the rivet 6 and a lock member 10 rotatably attached to the linear portion 1 a of the hook body 1. The lock member 10 is formed by bending a metal plate, has a U-shaped cross section, and has a closing member 5
Also, the closing member 5 and the hook body 1 are fitted to the hook body 1, and are inserted between both walls of the lock member 10. Further, the lock member 10 is connected to the linear portion 1 a of the hook body 1 by a connecting pin 11 arranged parallel to the rivet 6 and is rotatable around the connecting pin 11. The connecting pin 11 penetrates the lock member 10 and the hook body 1, and both ends thereof project to the outside of the lock member 10. A first operation handle 14 is attached to the U-shaped connecting portion of the lock member 10.

The lock member 10 has a slot 12 in the wall on the side of the locking pin, and the locking pin 9 is fitted into the slot 12. The slot 12 extends substantially in the lengthwise direction of the lock member 10 and has a shape that absorbs the rotational movement of the closing member 5. Further, on the side edge of the slot 12 on the base side of the hook body 1, two recesses for accommodating the locking pin 9 are provided at each of the two angular positions when the closing member 5 is in the closed position,
That is, the outermost first recess 1 when viewed from the connecting pin 11.
3a and a second concave portion 13b adjacent to the inside thereof are formed. In this case, the concave portion on the outer side as viewed from the connecting pin 11 is formed to be deeper than the concave portion on the inner side.

As shown in FIGS. 1A and 1B,
When the locking pin 9 is housed in the first recess 13a, the closing member 5 takes the first angular position in which it is rotated by the maximum angle in the closed position, and the inside of the U-shaped curved portion 1b of the hook body 1 is taken. The distance between the edge and the engaging edge 8 of the closing member 5 is the smallest, and when the locking pin 9 is housed in the second recess 13b, the closing member 5 is in the closed position more than the first angular position. The second angular position rotated by a small angle is taken, and the distance between the inner edge of the U-shaped curved portion 1b and the engaging edge 8 of the closing member 5 is increased.

In this embodiment, there are two recesses, but it is of course possible to form two or more recesses, and in this case, there are two or more angular positions in the closed position of the closing member 5. The locking pin 9 can be accommodated in each.

A second operation handle 15 is rotatably attached to the linear portion 1a of the hook body 1. The second operation handle 15 is also a bent metal plate, has a U-shaped cross section, and is fitted to the linear portion 1a of the hook body 1. The linear portion 1a is the second operation handle 1
5 is inserted between both walls. Second operation handle 15
Is connected to the hook body 1 by a rivet 16 arranged parallel to the connecting pin 11, and is rotatable around the rivet 16.

Coil-shaped springs 17 are arranged around both ends of the connecting pin 11. One end of each spring 17 is fixed to the lock member 10, and the other ends are connected to each other.
This connecting portion abuts on the inner side surface of the U-shaped connecting portion of the second operating handle 15, and the locking member 10 rotates clockwise with respect to the connecting pin 11 in FIG. 1, while the second operating handle 15 moves , The rivet 16 is always urged counterclockwise. Further, by the biasing of the lock member 10 in this manner, the closing member 5 is constantly biased toward the closed position.

In this case, in order to make the biasing force against the closing member 5 stronger, a pair of coil-shaped springs are arranged around the rivet 6 in the gap between the hook body 1 and the closing member 5, and each spring of each spring is arranged. One end is fixed to the closing member 5 and the other ends are connected to each other, and this connecting portion is connected to the hook body 1
It is also possible to urge the closing member 5 by the elastic force of this spring by contacting the closing member 5.

On both sides of the U-shaped connecting portion of the U-shaped curved portion 1b of the hook body 1, a metal plate 19 having the same shape as this surface and having two claws 18 formed on the inner curved edge thereof.
Are attached by rivets 20. In this case, at least one claw needs to be formed for each metal plate, and the metal plate 19 may be attached only to one surface of the U-shaped connecting portion of the U-shaped curved portion 1b. . Further, in this embodiment, the metal plate provided with the claws is attached to the U-shaped curved portion, but the claws may be integrally formed on the inner edge of the U-shaped curved portion.

Next, a method of operating the hook according to the present invention will be described. Normally, the locking pin 10 has the first recess 13a.
And the closure member 5 assumes a first angular position in the closed position. From this state, the first and second operation handles 14 and 15 are grasped by the operator's hand, the lock member 10 is rotated counterclockwise through the first operation handle 14, and the second operation handle 15 is moved. Rotate clockwise. As a result, after the locking pin 9 comes out of the first recess 13a and comes into contact with the side edge of the slot 12 opposite to the first recess 13a, the locking pin 9 is pushed by this side edge, and along with this, in the slot. Is moved toward the connecting pin 11. With the movement of the locking pin 9, the closing member 5 rotates toward the open position, and when the locking pin 9 abuts the inner edge of the slot 12, the closing member 5 takes the open position. (See FIG. 1C).

The U-shaped curved portion 1 of the hook body 1
When b is engaged with the foot hook 4, the operator's hand is separated from the first and second operation handles 14 and 15. At that time, the lock member 10 rotates clockwise, whereby the locking pin 9 is pushed by the side edge of the slot 12 on the concave side, and the first and second concave portions 13 a, 1
Exercise towards 3b. With the movement of the locking pin 9, the closing member 5 rotates toward the closed position.

When the closing member 5 is rotated to the closed position and the foot hook 4 has a large diameter, as shown in FIG. 1A, the engaging edge 8 of the closing member 5 causes the engaging hook 8 to move.
When it is pressed against, the closing member 5 assumes the second angular position, and as shown in FIG. 1 (B), when the foot hook 4 has a small diameter, the engaging edge 8 of the closing member 5 is put on the foot. When pressed against the nail 4, the closure member 5 assumes the first angular position.

Then, when the closing member 5 assumes the second angular position, the locking pin 9 is housed in the second recess 13b.
At this time, even if a force that causes the closing member 5 to suddenly rotate toward the open position acts, the locking pin 9 does not move.
Abutting the edge of 3b, the closure member 5 remains locked in the second angular position. Also, in this locked state,
The claw 18 engages with the foot hook 4. When the closure member 5 assumes the first angular position, the locking pin 9 is housed in the first recess 13a, and as before, the closure member 5 is locked in the first angular position and the pawl 18 rests on the foot. Engage nail 4.

In this way, the hook of the safety belt for high places work according to the present invention has the claw 1 of the U-shaped curved portion 1b of the hook body 1.
In the state where the closing member 5 is in pressure contact with the footrest nail 4 that is locked to 8, the footrest nail 4 is engaged and locked. Therefore, even if the operator steps off the foot, the hook is The nail 4 does not skid in the length direction and does not fall off the nail 4. In this way, the safety of workers at the utility pole work site is guaranteed. Moreover, the hook of the safety belt for high places work according to the present invention can be reliably engaged with the foot hook even if the diameter of the foot hook is different or the cross-sectional shape is different.

The operation of rotating the closing member 5 from the locked state at the first or second angular position to the open position is as follows.
As described above.

FIG. 3 is a plan view showing another embodiment of the hook of the safety belt for working at high places according to the present invention. FIG. 3A shows a state in which the hook is engaged with a foot hook having a small diameter.
(B) shows a state in which the hook is engaged with a foot hook having a large diameter, and (C) shows a state in which the hook closing member is in the open position. The embodiment shown in FIG. 3 is different from the embodiment shown in FIG. 1 only in the shape of the closing member and the structure of the locking means. Therefore, the same components as those of the embodiment of FIG.

According to the embodiment of FIG. 3, the closure member 30 comprises
Two substantially fan-shaped metal plates are arranged parallel to each other with one side surface facing each other, and one of the radial edges of the fan shape is connected. Then, the fan-shaped apex portion of the closing member 30 is connected to the base portion 2 of the hook main body 1 by the rivet 6 so that the hook main body 1 is sandwiched between both walls of the closing member 30 and is rotatable around the rivet 6. There is.

In this way, the closing member 30 has a closed position (see FIGS. 3A and 3B) that closes the U-shaped curved portion 1b and a U-shaped bending, similar to the closing member 5 of the embodiment shown in FIG. Part 1b
The open position (see FIG. 3 (C)) is opened. At this time, the hook body 1 is inserted between both walls of the closing member 30 so that the rotational movement of the closing member 30 is not hindered.

As shown in FIGS. 3A and 3B,
When the closure member 30 is in the closed position, one radial edge 30a of the sector of the closure member 30 extends towards the tip 3 of the hook body 1 and the other radial edge 30b of the closure member 30 is a straight portion of the hook body 1. It extends toward 1 a, and the tip 3 of the hook body 1 and the linear portion 1 a are inserted between both walls of the closing member 30.

Therefore, in the closed position, the closing member 30 closes the opening of the U-shaped curved portion 1b of the hook body 1, and at the same time, the circumferentially extending engagement edge 31 of the closing member 30 causes the hook body 1 to move. 1 U-shaped curved portion 1
It is adapted to be pressed against the foot hook 4 which engages with b.

A pair of coiled springs 32 are arranged around the rivet 6 in the gap between the hook body 1 and the closing member 30. One end of each spring 32 is fixed to the connecting portion of the closing member 30, the other ends thereof are connected to each other, and the connecting portion is brought into contact with the side edge of the linear portion 1a of the hook body 1, whereby the elasticity of the spring 32 is increased. The closing member 30 is constantly urged toward the closed position by the force.

Since the distance from the rivet 6 of the engaging edge 31 of the closing member 30 gradually decreases along the direction toward the tip 7 of the hook body 1, in the closed position of the closing member 30, The distance between the inner edge of the U-shaped curved portion 1b of the hook body 1 and the engaging edge 31 of the closing member 30 changes depending on the rotation angle of the closing member 30. Therefore, even if the diameter of the foot hook 4 is large or small, the closing member 3
In the closed position, 0 is an angular position corresponding to the diameter of the foot-hooking nail 4, and the engaging edge 31 reliably engages the foot-hooking nail. In order to ensure the engagement by the foot hooks 4, the engagement edge 31 may be formed with continuous teeth in the length direction thereof.

As shown in FIG. 3C, in the open position,
The hook body 1 is inserted between both walls of the closing member 30, and the closing member 30 overlaps the straight portion 1a of the hook body 1,
The U-shaped curved portion 1b of the hook body 1 is open.

The hook according to the invention further comprises locking means for locking the closure member 30 in its closed position in a plurality of angular positions. The locking means is the closure member 3
It has a locking pin 33 projecting from 0 and arranged parallel to the rivet 6, and a locking member 34 rotatably attached to the closing member 30. The lock member 34 is formed by bending a metal plate, has a U-shaped cross section, and is fitted between the linear portion 1 a of the hook body 1 and the closing member 30, and the hook body 1 is placed between both walls of the lock member 34. ,Also,
The hook body 1 and the lock member 34 are inserted between both walls of the closing member 30. The locking member 34 is a rivet 6
The closure member 30 by means of rivets 35 arranged parallel to the
Is connected in the vicinity of one radial edge 30 a of the fan shape and is rotatable around the rivet 35.

The lock member 34 has a slot 36 in the wall on the locking pin side, and the locking pin 33 is fitted into the slot 36. The slot 36 extends substantially in the length direction of the lock member 34 and has a shape that absorbs the rotational movement of the closing member 30. Further, at the side edge of the slot 36 on the side of the tip 7 of the hook body, two recesses for accommodating the locking pins 33, that is, the rivet 35, are provided at the two angular positions of the closing member 30 in the closed position. The outermost first recess 37a and the second inner recess 37a adjacent to the inner recess 37a.
A recess 37b is formed. At this time, the rivet 35
As seen from the above, the outer recess is formed to be deeper than the inner recess.

As shown in FIGS. 3A and 3B,
When the locking pin 33 is housed in the first recess 37a, the closing member 30 is rotated by the maximum angle in the closed position.
When the locking pin 33 is housed in the second concave portion 37b, the gap between the inner edge of the U-shaped curved portion 1b of the hook body and the engaging edge 31 of the closing member becomes the smallest and the locking pin 33 is housed in the second recess 37b. In the closed position, the closing member 30 takes the second angular position which is rotated by an angle smaller than the first angular position, and the gap between the inner edge of the U-shaped curved portion 1b and the engaging edge 31 is larger. It is supposed to be.

In this case, by forming the two or more recesses, the locking pin 33 can be housed in each of the two or more angular positions of the closing member 30 in the closed position.

A pair of coiled springs 38 are arranged around the rivet 35 in the gap between the closing member 30 and the locking member 34. And each spring 38
One end of the lock member 34 is fixed to the lock member 34 and the other end thereof is connected to each other, and the connecting portion abuts on the inner surface of the portion connecting the two fan-shaped closing members, and the lock member 34 has the rivet 35 in FIG. Is always biased clockwise.

Next, a method of operating the hook will be described. Normally, the locking pin 33 is housed in the first recess 37a, and the closing member 30 takes the first angular position in the closed position. From this state, the edge 30a of the closing member 30 and the leading edge of the locking member 34 are gripped by the operator's hand, the locking member 34 rotates counterclockwise, and the closing member 30 rotates clockwise. As a result, the locking pin 33 comes out of the first recess 37a and comes into contact with the side edge of the slot 36 on the side opposite to the first recess 37a, and then, while being pushed by this side edge, in the slot. To the rivet 35. With the movement of the locking pin 33, the closing member 30
Pivots towards the open position and the locking pin 33 engages the slot 3
When it abuts against the inner edge of 6, the closing member 30 assumes the open position (see FIG. 3 (C)).

The U-shaped curved portion 1 of the hook body 1
When b is engaged with the foot hook 4, the operator's hand is separated from the closing member 30 and the locking member 34. At that time, the locking member 34 rotates clockwise, whereby the locking pin 33 is pushed by the side edge of the slot 36 on the concave side, and moves in the slot toward the first and second concave portions 37a and 37b. To do. With the movement of the locking pin 33,
The closing member 30 rotates toward the closed position.

When the closing member 30 is rotated to the closed position,
If the foot hook 4 has a large diameter, the closing member 30
When the engaging edge 31 of the is pressed against the foot hook 4, the closure member 30 assumes the second angular position (FIG. 3B).
If the footrest nail 4 has a small diameter, the closing member 30 assumes the first angular position when the engagement edge 31 is pressed against the footrest nail 4 (see FIG. 3A).

When the closing member 30 assumes the second angular position, the locking pin 33 is housed in the second recess 37b. At this time, even if a force that suddenly rotates the closing member 30 toward the open position acts, the locking pin 33 abuts on the edge of the second recess 37b, and the closing member 30 moves at the second angle. It remains locked in position. Further, in this locked state, the claw 18 engages with the footrest nail 4. When the closure member 30 is in the first angular position, the locking pin 33 engages the first recess 3
7a, the closing member 30 is locked in the first angular position and the pawl 18 engages the foot hook 4 as before.

It goes without saying that the same effects as in the case of the embodiment of FIG. 1 can be obtained in this embodiment as well.

[0054]

As described above, according to the present invention,
Since the hook engages with the footrest nail in a state where the closing member is in pressure contact with the footrest nail locked to the claw of the U-shaped curved portion of the hook body, even if the operator steps off the foot, The hook does not skid along the length of the foot hook and thus does not fall off the nail. Moreover,
The hook according to the present invention is different in the diameter of the foot hook,
Further, even if the cross-sectional shapes are different, it is possible to reliably engage the foot hook. Thus, according to the present invention, the safety of the worker is sufficiently ensured at the power pole work site.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a hook for a safety belt for work at high places according to the present invention, (A) showing a state where the hook is engaged with a large-diameter hook, and (B) shows , (C) shows the state where the hook is engaged with the foot hook with a small diameter.
Fig. 6 shows the hook closing member in the open position, respectively.

2 is an exploded perspective view of the hook shown in FIG. 1. FIG.

FIG. 3 is a plan view showing another embodiment of the hook of the safety belt for high places work according to the present invention, (A) shows a state where the hook is engaged with a foot hook having a small diameter, (B). Shows the state where the hook is engaged with a large diameter foot hook (C)
Shows respective states in which the closing member of the hook is in the open position.

FIG. 4 is a diagram showing an example of use of a conventional safety belt for work at high places at a pole work site.

FIG. 5 is a perspective view showing various examples of foot hooks on a utility pole.

[Explanation of symbols]

 1 Hook body 1a Straight part 1b U-shaped curved part 2 Base part 3 Tip of lifeline 4 Foot hooking 5 Closing member 6 Rivet 7 Tip 8 Engagement edge 9 Locking pin 10 Locking member 11 Connecting pin 12 Slots 13a, 13b Recessed 14th 1 operation handle 15 2nd operation handle 16 rivet 17 spring 18 claw 20 rivet

Claims (3)

[Claims] 1. A straight line portion and U extending from the straight line portion
A hook body that is composed of a U-shaped curved portion, the base portion of the straight portion is fixed to the tip of the lifeline of the safety belt for working at high places, and the U-shaped curved portion engages with the foot hook, and the base portion of the hook body. A pivot shaft attached to the hook body, and the pivot body is pivotably mounted around the pivot shaft and pivots from the position of the linear portion of the hook body toward the tip of the U-shaped curved portion. A closing member for closing the U-shaped curved portion of the hook body, the closing member being formed on the closing member so that the distance from the rotation axis gradually decreases along the direction toward the tip of the U-shaped curved portion of the hook body. When the closing member is in its closed position, it is disposed between the closing member and the hook body, the engaging edge being pressed against the foot hook that engages the hook body, and the closing member is always Said closed A spring urged toward a position, and an inner edge of the U-shaped curved portion of the hook body,
A hook for a work belt for high places, comprising at least one claw that engages with the foot hook. 2. In the closed position of the closing member, there is provided locking means for locking the closing member at a plurality of angular positions, the locking means protruding from the closing member and parallel to the rotating shaft. A locking pin disposed on the hook body, a second rotating shaft attached to the linear portion of the hook body and arranged in parallel with the rotating shaft, and rotatable about the second rotating shaft. A lock member attached to the lock member; a slot formed in the lock member; the lock pin is fitted into the lock member to absorb a rotational movement of the closing member; At least one of the plurality of angular positions of the member, the spring has the lock member, and the recess of the slot has the locking pin. Push The hook for a safety belt for high places work according to claim 1, wherein the hook is biased in the direction of being kicked. 3. In the closed position of the closing member, there is provided locking means for locking the closing member at a plurality of angular positions, the locking means protruding from the linear portion of the hook body, A locking pin arranged parallel to the shaft, a second rotating shaft attached to the closing member and arranged parallel to the rotating shaft, and rotatable about the second rotating shaft. A lock member attached to the lock member; a slot formed in the lock member; the lock pin is fitted into the lock member to absorb a rotational movement of the closing member; Two or more recesses that house the locking pin at each of the plurality of angular positions of the member, and the lock member is disposed between the closure member and the lock member, and the recess of the slot engages the lock member. Stop pin The hook for a safety belt for working at high places according to claim 1, further comprising a second spring that biases the spring in a direction in which the belt is pressed against.