JPS5825134Y2 - Hook with safety device - Google Patents

Description

[Detailed description of the invention] This invention relates to a hook with a safety device attached to a safety belt.

When working at high places such as bridges or steel towers, a safety belt is usually attached to the waist, and a hook attached to the safety belt via a rope is engaged with a part of the steel tower to prevent a fall in the event of a misstep. I'm trying to prevent it.

The hook of the safety body used for the above-mentioned work has a large effective diameter, and in consideration of safety, a safety device is attached to the hook.

As an example of a hook with a safety device, an operating lever for opening and closing a hook formed on the hook body is swingably attached to the hook body, and a braking lever is provided on the hook body to prevent the operating lever from swinging. There has conventionally been a hook that allows the operating lever to be swung after the brake lever is operated.

However, in conventional hooks of this type, a braking lever is placed opposite the operating lever so that the hooking and unhooking work is performed with both hands. Extremely dangerous.

The object of this invention is to solve the above-mentioned drawbacks and to provide a hook with a safety device that allows the user to unhook and unhook the engaged position of an angle or the like with one hand.

This idea involves attaching a control lever for opening and closing the hook-release opening formed on the hook body so that it can swing toward the inside of the main body, overlapping the brake lever with the control lever, and using the central part as the control lever. When the operating lever is connected, the notch formed at the rear end of the brake lever engages with a fixed stopper pin provided on the hook body to prevent the operating lever from swinging, and the above-mentioned braking When the tip of the lever is pressed inward of the hook body to operate the brake lever and swing it relative to the bar, the above notch will be released from the stopper pin, and in this disengaged state. The insertion opening of the hook body can be opened by a swinging operation of the brake lever that presses the tip of the brake lever toward the inside of the hook body so that the brake lever engages with the operation lever in the swinging force direction. This is how it was done.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIGS. 2 and 3, the hook body 1 includes a U-shaped connecting rod portion 2 for connecting ropes, and a hook rod portion 3 is provided at one end of the connecting rod portion 2. A release opening 4 is formed between the end of the hook rod 3 and the other end of the connecting rod 2.

A U-shaped bracket 5 is provided between the opposing ends of the connecting rod portion 2.
is fixed, and one end of the operating lever 7 is supported via a pin 6 inserted into the bracket 5 and the other end of the connecting rod 2.

The operating lever 7 is provided with opposing side plates 8, 8, and one end of the side plate 8 is supported by the pin 6 so as to be able to swing freely toward the inside of the hook body 1. When the engaging pin 10 provided at the end of the hook rod portion 3 is fitted into the notch 9 formed at the other end of the side plate 8 by swinging outward, the hook body 1 is unlatched. The opening 4 is closed by this operating lever 7.

A spring 11 is supported on the pin 6 that supports the operating lever 7, and the notch 9 of the spring 11 is connected to the engagement pin 10.
The operating lever 7 is deflected so as to engage with.

The brake lever 12 disposed between the opposing side plates 8 of the operating lever 7 is provided with an opposing side plate 13, and the opposing side plate 1 is provided with an opposing side plate 13.
3 is supported by the operating lever 7 via a pin 14.

The rear end of the brake lever 12 located on the side of the connecting rod 2 is located inside the bracket 5, and a notch 15 is formed in the end thereof, and a stopper is provided in the bracket 5 corresponding to the notch 15. A pin 16 is formed.

Further, a protruding piece 17 is formed at the other end of the brake lever 12, and this protruding piece 17 protrudes laterally from the side plate 8 of the operating lever 7.

The pin 14 that supports the brake lever 12 is provided with a spring 18 whose elasticity is weaker than that of the operating lever deflection spring 11.
is supported, and the braking lever 12 is deflected by the elasticity of the spring 18 so that the notch 15 engages with the stopper pin 16.

Now, when the protrusion 17 is pressed inward to the hook body 1 to swing the brake lever 12, the notch 15 disengages from the stopper pin 16, and in this disengaged state, the brake lever 12 A portion 19 near the rear end engages with the operating lever 7.

Furthermore, when the operating lever 7 is swung toward the inside of the hook body 1, the brake lever 12 oscillates around the pin 6, but at the same time as the swiveling starts, the notch 15 is inserted into the stopper pin 16.
It is designed to engage with.

The hook shown in the embodiment has the above structure, and the hook is attached to the safety belt 20 via the rope 21, as shown in FIG.

Now, when the protruding piece 17 of the brake lever 12 is pressed inward of the hook body 1 to swing the brake lever 12,
As shown in FIG. 6, the engagement between the notch 15 and the stopper pin 16 is released, and after the engagement is released, the rear end portion 19 of the brake lever 12 comes into contact with the operating lever 7, and the brake lever 1
2 and the operating lever 7 engage in the rotational direction.

Therefore, when the brake lever 12 is further swung in the same direction as above, the operating lever 7 is also swung in the same direction, and the opening 4 for unlatching the hook body 1 is opened.

By the above operation, the hook body 1 is unlatched by opening the opening 4 for removing the hook body 1.
can be engaged with any member, and when the above member is positioned inside the hook rod portion 3 and the suppression of the projection piece 17 is released, the operating lever 7 and the brake lever are activated by the restoring elasticity of each spring 11.18. 12 returns to the state shown in Figure 2,
The notch 9 of the operating lever 7 engages with the engagement pin 10.

When the operating lever 7 is pressed toward the inside of the hook body 1 while the hook body 1 is engaged with an arbitrary member,
Since the brake lever 12 swings around the pin 6 together with the operating lever 7, the notch 15 of the brake lever 12 engages with the stopper pin 16, and this engagement prevents the operating lever 7 from swinging. , the hook body 1 can be held in an engaged state.

As shown in FIGS. 1 and 2, a bent piece 22 is formed outward from the other end of the side plate 8 facing the operating lever 7, and this bent piece 22 is bent outward from the other end of the side plate 8 facing the operating lever 7. By being flush with the piece 17, the safety belt 20
In the working state when using the brake lever 12, the protrusion 1 of the brake lever 12
7 can be prevented from engaging with any other member and being pushed inward.

The attachment of the stopper pin 16 that engages with the notch 15 of the brake lever 12 is not limited to that shown in FIG. 2; for example, as shown in FIG. 4, the stopper pin 16 may be welded to one end of the connecting rod portion 2. By adopting the above-mentioned mounting method, the bracket 5 can be omitted.

Further, as shown in FIG. 4, by forming an arc-shaped long hole 23 with the pin 6 in the center in the opposing side plate 8 of the operating lever 7, and inserting the end of the stopper pin 16 into this long hole 23. , the operating lever 7 can be swung within a range limited by the stopper pin 16.

In the case of the embodiment, when the notch 15 of the rear end corner of the brake lever 12 and the stopper pin 16 are not engaged,
Although the end 19 of the brake lever 12 is adapted to engage with the operating lever 7, the pin 14 is attached to the opposite side plate 8 of the operating lever 7.
An arc-shaped elongated hole is formed with a center at They may be engaged, and the shape of the notch 15 is arbitrary.

As described above, when the brake lever is swung relative to the operating lever, the notch formed in the brake lever disengages from the stopper pin provided on the hook body, and this disengagement occurs. In this state, a part of the brake lever engages with the control lever, and the control lever can be swung together with the brake lever in the release direction, making it possible to hook and remove large hook bodies with a large inner diameter of the hook rod with one hand. In addition, when the operating lever is swung toward the inside of the main body while the hook body is engaged, the notch of the brake lever engages with the stopper pin to prevent the operating lever from swinging inward. Therefore, even if the operating lever is pressed by mistake, the operating lever cannot be opened and is therefore safe.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the hook according to this invention in use, Fig. 2 is a partially cutaway front view of the same hook, Fig. 3 is a vertical side view of Fig. 2, and Fig. 4 is a front view of the hook according to this invention. 5 is a partially cutaway front view showing another embodiment of such a foot; FIG. 5 is a vertical side view of FIG. 4; FIG. 6 is a partially cutaway front view showing the operating state of the brake lever shown in FIG. 2. It is. 1...Hook body, 2...Connecting rod part,
3... Hook rod part, 4... Opening for hook removal, 7... Operating lever 11... Sprinkle link, 12... Braking Lever 15...
・Notch, 16... Stopper pin, 18...
... Spring, 19 ... End.

Claims (1)

[Scope of utility model registration request] A hook body 1 has a rope connecting part 2 at one end and a U-shaped hook rod part 3 at the other end, and is swingably connected to one end of the hook body 1 so that the hook body 1 can be unlatched. an operating lever 7 that opens and closes the opening 4 from inside the main body 1; a spring 11 that deflects the operating lever 7 in a direction to fully close the opening 4; and a swinging mechanism whose central portion is supported by the operating lever 7. A notch 15 is provided at the rear end of the brake lever 12, which is located in the direction of the rope connecting portion 2, and is engageable with a stopper pin 16 provided at one end of the hook body 1. A spring 18 is provided for deflecting the brake lever 12 in a direction in which the notch 15 engages with the stopper pin 16, and the elasticity of the spring 18 is made weaker than the elasticity of the spring 11 for deflecting the operating lever. The formation position of the notch 15 is regulated so that the notch 15 engages with the stopper pin 16 when the lever 7 is swung toward the inside of the hook body 1, and the stopper pin 16 is regulated by swinging the brake lever 12. When the engagement between the brake lever 12 and the notch 15 is released, a part of the brake lever 12 engages with the operating lever 7 in the rotational direction.