JPH059013Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a hook with a safety device.

[Conventional technology and its problems]

Generally, when working at high places, a safety belt is fastened around the waist of the worker, and the hook at the end of the rope connected to the safety belt is engaged with a main rope stretched at high places to prevent the worker from falling. I am trying to achieve this.

By the way, since it is necessary to change the tensioning position of the above-mentioned main rope in accordance with changes in the working position, hooks with safety devices are usually attached to both ends.

A prior art example of the above-mentioned safety hook is shown in FIG. This hook has a hook 21 at the tip of the hook body 20, and an operating lever 23, which is arranged inside the hook body 20 and is swingable about a pin 22, is deflected by a spring 24. A pin 26 is attached to a pin support piece 25 provided at the rear end of the operating lever 23, with its tip abutting the inside of the tip of the hook portion 21.

Further, a spring 29 is installed between the hook body 20 and a lock lever 28 which is arranged on the outside of the hook body 20 and is swingable about a pin 27, and the tip of the lock lever 28 is attached to the pin 27.
6 is inserted into the arc-shaped long hole 30, and the long hole 3
An engagement hole 31 is formed at the end of the 0.

In the above hook, the pin 26 and the engagement hole 3
1, the operating lever 23 is prevented from rotating, and the locking lever 28 is pivoted about the pin 27, and the operating lever 23 is pivoted with the end of the elongated hole 30 facing the pin 26. Since it is necessary to open the opening of the hook portion 21, there is an advantage that it is safe.

However, since the hook is hooked onto and removed from a suitable structure, the inner diameter of the hook portion 21 is large, and the angle formed by the operating lever 23 and the lock lever 28 is also extremely large. Therefore, if the operating lever 23 and the locking lever 28 are held simultaneously with one hand, they will slip, and it is extremely difficult to swing the locking lever 28 and the operating lever 23 continuously with one hand, resulting in poor operability.

[Purpose of invention]

Therefore, the purpose of this invention is to eliminate the above-mentioned disadvantages and improve the operability of a hook with a safety device.

[Structure of the idea]

In order to achieve the above object, this invention is such that the rear end of an operating lever having a pair of side plates is swingably attached to the inner rear part of a hook body having a hook at its tip, and the tip of the operating lever is attached to the hook. A spring is provided for deflecting the operating lever in a direction in which it comes into contact with the inner side of the tip of the operating lever, and a fingertip engagement window is formed at the tip of the side plate of the operating lever, and when the tip faces the fingertip engagement window, the operating lever is closed. A rear end portion of a lock lever for preventing rotation is swingably attached to the inner center portion of the hook body, and a stopper mechanism is provided for preventing rotation of the lock lever in a state in which the lock lever prevents rotation of the operation lever. The structure includes a spring that deflects the lock lever in the direction in which it operates.

[Effect]

With the above configuration, the tip of the lock lever faces the back of the operating lever that closes the opening of the hook from the inside, so even if an appropriate obstacle comes into contact with the operating lever, the operating lever will not rotate. It's safe.

In addition, by grasping the hook body and inserting your fingertip into the fingertip engagement window, you can use your fingertip to push down the tip of the lock lever and pull the operating lever. The swing in the opening direction can be operated continuously with one hand.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 and 2.

As shown in the figure, the hook body 1 has a hook portion 2 at its tip, and an operating lever 3 for opening and closing the opening of the hook portion 2 from the inside is arranged on the inside of the hook body 1.

The operating lever 3 has a pair of side plates 4, 4, and the rear end of the side plate 4 is swingably attached to the inner rear end of the hook body 1 with a pin 5.

A spring 6 is installed between the rear end of the operating lever 3 and the inner edge of the hook body 1, and the elasticity of the spring 6 deflects the operating lever 3 in one direction, so that the tip end is connected to the tip of the hook 2. The opening of the hook portion 2 is closed by contacting the inside.

Further, a fingertip engagement window 7 is provided at the tip of the side plate 4 of the operating lever 3. This fingertip engagement window 7
may be a notch as shown in the figure, or a hole as shown by the chain line A in FIG. The lock lever 8, whose tip end faces the fingertip engagement window 7, is provided with a pair of side plates 9, and a pair of support pieces 10 connected to the rear end of the side plates 9 are attached via pins 11 to the inner center of the hook body 1. It is swingably supported by the section.

A stopper part 12 that can come into contact with the side edge of the hook body 1 is provided at the rear end of the lock lever 8, and when the stopper part 12 comes into contact with the side edge of the hook body 1, the tip of the lock lever 8 The part faces the fingertip engagement window 7, and the tip faces the operation lever 3.
This prevents the operation lever 3 from swinging in the direction of opening the hook portion 2 while facing the back surface of the hook portion 2.

A spring 13 is attached to the pin 11 that supports the lock lever 8, and the elasticity of the spring 13 causes the lock lever 8 to move in the direction in which the stopper portion 12 of the lock lever 8 comes into contact with the side edge of the hook body 1.
is biased.

The hook with a safety device shown in the embodiment has the above-mentioned structure, and in this hook, like the conventional hook, the lock lever 8 is swung, and then the operation lever 3 is swung to lock and release the hook 2. Let's do it.

Now, by holding the rear end of the hook body 1 and inserting a fingertip into the fingertip engagement window 7 of the operating lever 3, the tip of the lock lever 8 can be pushed with the fingertip. When the tip of the lock lever 8 is pressed, the lock lever 8 swings around the pin 11, so that the tip of the lock lever 8 separates from the back surface of the operating lever 3, and the operating lever 3 is unlocked. Therefore, by pulling the operating lever 3, the operating lever 3 swings around the pin 5 to open the opening of the hook 2, allowing the hook 2 to be hooked onto and removed from an appropriate structure.

When the operating lever 3 is swung by the operation of grasping the operating lever 3 in the above-mentioned work of engaging and disengaging, the fingertips grasping the operating lever 3 face the opening of the hook 2, so the hook Although the effective diameter of the hook 2 becomes smaller and the fingertip gets in the way of hooking and unhooking the hook 2, insert the fingertip into the fingertip engagement window 7 and press the operating lever 3.
Since the hook part 2 is swung, the fingertips do not get in the way when hooking and unhooking the hook portion 2, and the hooking and unhooking work can be carried out effectively.

After hanging the hook 2 on a suitable structure, when the fingertip is pulled out from the fingertip engagement window 7, the operating lever 3 swings due to the elasticity of the spring 6, and the tip comes into contact with the inside of the tip of the hook 2. The lock lever 8 is also swung by the elasticity of the spring 13 so that its tip faces the back surface of the operating lever 3, so that the operating lever 3 can be locked.

In the case of the embodiment, the lock lever 8 is provided with a stopper portion 12 to prevent the lock lever 8 from rotating, but the rotation preventing mechanism is not limited to this, for example,
A protrusion may be provided on the inner surface of the operating lever 3, with which the tip of the lock lever 8 can come into contact.

〔effect〕

As described above, in this invention, a fingertip engagement window is provided on the side plate of the operation lever, and the tip of the lock lever is exposed to the fingertip engagement window, so that the fingertip inserted into the fingertip engagement window can be used to The lock lever and operation lever can be reliably swung.

Therefore, with this invention, it is possible to operate the hook on and off with one hand, and the lock lever and operation lever can be swung continuously, improving the operability of the hook. .

In addition, since the lock lever and operation lever are swung by the fingertip inserted into the fingertip engagement window, the fingertip does not get in the way when hooking and unhooking the hook in the open state, making it possible to do the hooking and unhooking work smoothly. .

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of a hook with a safety device according to this invention, FIG. 2 is a cross-sectional plan view of the same, and FIG. 3 is a front view showing a conventional hook. DESCRIPTION OF SYMBOLS 1...Hook body, 2...Hook part, 3...Operation lever, 4...Side plate, 6...Spring, 7...Fingertip engagement window, 8...Lock lever, 12...Stopper part, 13... spring.

Claims (1)

[Scope of utility model registration request] The rear end of the operating lever, which has a pair of side plates, is swingably attached to the inner rear part of the hook body that has a hook at the tip, and the operating lever is moved in a direction so that the tip of the operating lever comes into contact with the inner side of the tip of the hook. A fingertip engaging window is formed at the tip of the side plate of the operating lever, and the rear end of the lock lever that prevents rotation of the operating lever is provided with a spring that deflects the operating lever when the tip of the operating lever faces the fingertip engaging window. The lock lever is swingably attached to the inner center of the main body, and at a position where the lock lever stops the operating lever from rotating, a stopper mechanism is provided to prevent the lock lever from rotating, and a spring is provided to deflect the lock lever in the direction in which the stopper mechanism operates. Hook with safety device.