JPH0234494Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a hook with a safety device that connects to a safety rope or the like.

[Conventional technology and its problems]

Generally, pole workers connect a safety rope to a pole safety belt fastened around their waist, and engage the hooks attached to the ends of the safety ropes with appropriate fixing members to perform pole work. There is.

By the way, if the hook of the hook is open, there is a risk of it coming off the fixing member, so the hook connected to the safety rope should be equipped with a safety device that can open and close the opening of the hook. It will be done.

As a conventional technology for the above-mentioned hook with a safety device, there is one disclosed in Japanese Utility Model Publication No. 11215/1983, for example. As shown in FIGS. 7 and 8, this hook with a safety device has one end of an opening/closing piece 22 rotatably supported by a pin 23 at the rear of one side of a hook body 21 having a hook 20 at its tip. A spring 24 is provided which biases the opening/closing piece 22 in a direction such that the other end of the opening/closing piece 22 comes into contact with the inner surface of the distal end portion of the hook portion 20.

Also, a pair of support pieces 25, 25 are attached to the center of one side of the hook body 21, and a lock lever 27 is swingably supported around a pin 26 supported by the support pieces 25 to open and close one end of the lock lever 27. An operation piece 28 facing the center of the side edge of the piece 22 and provided at the other end of the lock lever 27 is disposed opposite to the outer edge of the hook body 21 with a required spacing therebetween.

Further, a pin 26 supporting the lock lever 27
One end of the lock lever 27 is located outside of the opening/closing piece 2.
A spring 29 is attached to bias the lock lever 27 in a direction opposite to the side edge of the lock lever 27.

In the hook constructed as described above, since the lock lever 27 is L-shaped, it can be easily swung even by a hand wearing thick gloves or several pairs of gloves, so it has good operability. It is necessary to swing the lock lever 27 to separate one end of the lever 27 from the side edge of the opening/closing piece 22 and then swinging the opening/closing piece 22 to open the opening of the hook 20. Even if an object comes into contact with the opening/closing piece 22, the opening/closing piece 22 does not swing in the opening direction, and the hook portion 20 engaged with the fixing member can be maintained in the engaged state.

However, since the operating piece 28 of the lock lever 27 is configured to protrude sideways from the outer edge of the hook body 21, there is a high risk that the operating piece 28 will hit an obstacle, and if it hits an obstacle, the lock lever 27 will rotate. , since the opening/closing piece 22 is unlocked, there is a problem with reliability in terms of safety.

[Purpose of invention]

Therefore, the purpose of this invention is to solve the above problems and improve the safety of a hook with a safety device.

[Structure of the idea]

In order to achieve the above object, this invention provides a guard that protrudes laterally from the outer edge of the hook body around the attachment position of the lock lever on the hook body, and the surface of the guard is the rotation plane of the opening/closing piece. The structure is such that it is perpendicular to the plane and close to the plane that includes the pressing position of the operating piece of the lock lever.

[Effect]

With the above structure, when the operating piece of the lock lever hits an obstacle, the tip of the guard also hits the obstacle at the same time, thereby preventing the lock lever from rotating in the unlocking direction.

〔Example〕

Hereinafter, embodiments of this invention will be described based on FIGS. 1 to 6.

As shown in FIGS. 1 to 3, a hook 2 is provided at the tip of the flat hook body 1, and an opening/closing piece 3 for opening and closing the opening of the hook 2 is provided on the inside of the hook body 1. It is being

The opening/closing piece 3 is U-shaped as shown in FIG. 2, and the inner side of the hook body 1 can be fitted between the opposing plates 4, 4. This opening/closing piece 3
The rear end has a pin 5 at one end inside the hook body 1.
It is rotatably attached via a pair of plates 4, and is deflected by a spring 6 installed between a pair of plates 4, so that its tip abuts the inner surface of the tip of the hook 2.

Further, a lever support body 7 is attached to one side and the other side of the hook body 1, and a pin 9 is passed between a pair of supporting pieces 8 provided at both ends of the lever support body 7 and arranged oppositely. A pair of protrusions 11 provided on both sides of the lock lever 10 are rotatably supported.

A bent piece 13 is provided at the tip of the lock lever 10 and can be fitted into a notch 12 formed in the side edge of the plate 4 of the opening/closing piece 3. Further, an operating piece 14 is provided at the rear end of the lock lever 10 and is arranged oppositely between the outer edges of the hook body 1 at a required interval. When it comes into contact with the edge, the bent piece 1
3 can be removed from the notch 12.

The lock lever 10 is deflected in one direction by a spring 15 fitted on the outside of the pin 9, and the bent piece 13 at the tip fits into the notch 12 of the opening/closing piece 3, causing the opening/closing piece 3 to rotate in the opening direction. It prevents it from moving.

A band-shaped guard 16 is extended between the outer edges of the pair of support pieces 8 of the lever support 7, and the guard 16 faces the outer upper part of the operation piece portion 14 of the lock lever 10. Further, the surface of the guard 16 is orthogonal to the rotation plane of the opening/closing piece 3, and the surface of the guard 16 is perpendicular to the rotation plane of the opening/closing piece 3,
It is arranged close to a plane including the pressing position No. 4.

The hook shown in the embodiment has the above-mentioned structure, and when engaging the hook with the fixed member, grip the opening/closing piece 3 and the lock lever 10, rotate the lock lever 10 by pushing in the operating piece 14, and release it from the notch 12. Remove the bent piece 13, then tighten the opening/closing piece 3 or press the opening/closing piece 3 against the fixed member and rotate the opening/closing piece 3 around the pin 5 to open the opening of the hook 2 and attach it to the fixed member. engage.

After engaging the hook portion 2 with the fixed member, the opening/closing piece 3
When the pressure is released, the opening/closing piece 3 rotates due to the elasticity of the spring 6 and its tip comes into contact with the inner surface of the tip of the hook 2, and the operating piece 14 of the lock lever 10
When the pressure is released, the lock lever 10 rotates due to the elasticity of the spring 15, the bending piece 13 fits into the notch 12, and the opening/closing piece 3 is held in a state in which the opening of the hook 2 is fully closed.

In the above-mentioned engaged state, when an obstacle A shown by a chain line in FIG. 2 comes into contact with the pressed position of the operation piece 14, the guard 16 also comes into contact with the obstacle A at the same time, so the lock lever 10 does not rotate. . Therefore, the opening/closing piece 3 is held in a state in which the opening of the hook portion 2 is closed by the lock lever 10, which is extremely safe.

4 to 6 show other embodiments of the hook according to this invention. As shown, the lever support 7 includes an elongated support plate 17 .
Guards 16' are provided at both ends of one side of the plate, and a clamping piece 18 facing the support plate 17 is provided at the side edge of each guard 16'. Further, a support piece 8 is formed on the opposite edge of each clamping piece 18.

This lever support body 7 includes a support plate 17 and a clamping piece 1.
The outer edge of the hook body 1 is fitted between the outer edge of the lock lever 10 and the outer edge of the lock lever 10 supported by the support piece 8, and each guard 16' is connected to the outer surface of the operating piece 14 of the lock lever 10 supported by the support piece 8. They are arranged approximately on the same plane.

In the above embodiment as well, when the obstacle A comes into contact with the operation piece 14 of the lock lever 10, the obstacle A also comes into contact with the guard 16', thus preventing the lock lever 10 from rotating due to the contact with the obstacle. be able to.

In the embodiment, the lever support 7 is provided with guards 16, 16', but the hook body 1 may be provided with a guard, or a member provided with a guard may be attached to the hook body.

〔effect〕

As described above, this invention provides a guard around the operation piece of the lock lever that prevents the opening/closing piece from rotating in the opening direction, so that when an obstacle comes into contact with the operation part, the obstacle is protected. Since the lock lever is also made to hit at the same time, it is possible to reliably prevent the lock lever from rotating due to contact with an obstacle, further increasing the safety of the hook.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the hook according to this invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is an exploded perspective view showing the same lock lever and lever support. , FIG. 4 is a partial perspective view showing an embodiment of the above hook, FIG. 5 is a sectional view of the same, FIG. 6 is a perspective view of the lever support body of the above, and FIG.
The figure is a plan view showing a conventional hook, and FIG. 8 is a sectional view taken along the line - in FIG. 7. DESCRIPTION OF SYMBOLS 1...Hook body, 2...Hook portion, 3...Opening/closing piece, 7...Lever support body, 10...Lock lever, 14...Operation piece part, 16, 16'...Guard.

Claims (1)

[Claims for Utility Model Registration] (1) A hook body having a hook at the tip, a swingable opening/closing piece for opening and closing the opening of the hook, and a tip facing the side of the opening/closing piece, An L-shaped lock lever that prevents the swinging of the opening/closing piece by contacting the lock lever is attached, and the lock lever is swung by pressing the operating piece facing the outer edge of the hook body of the lock lever, and then the opening/closing piece is opened. In a hook with a safety device that can be operated, a guard is provided around the mounting position of the lock lever on the hook body and projects laterally from the outer edge of the hook body, and the guard surface is aligned with the rotation plane of the opening/closing piece. A hook with a safety device, characterized in that the hook is located close to a plane that is perpendicular to the plane and includes the pressing position of the operating piece of the lock lever. (2) The hook with a safety device according to claim 1, wherein the guard is provided with a lock lever on a support.