JP3649455B2 - Hook with safety device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a hook with a safety device.
[0002]
[Prior art]
In general, when working at a high place, tighten a safety belt on the operator's waist and engage the hook at the top of the rope connected to the safety belt with a master rope or an appropriate structure. To prevent people from falling.
[0003]
By the way, if the hook is a normal hook having a collar at the tip, there is a risk that the hook will come off from an engaged object such as a master rope. Therefore, a hook with a safety device is used.
[0004]
As a hook with a safety device, the one shown in FIG. 3 is conventionally known. This hook is provided with a collar portion 21 at the tip end portion of the hook body 20, arranged on the inner side portion of the hook body 20, and an operating lever 23 provided so as to be swingable around a pin 22 is deflected by a spring 24. The tip is brought into contact with the inner surface of the tip of the flange 21, and a pin 26 is attached to a pin support piece 25 provided at the rear end of the operation lever 23.
[0005]
A spring 29 is incorporated between the lock body 28 and the lock lever 28 which is disposed on the outer side of the hook body 20 and can swing around the pin 27, and the pin 26 is attached to the tip of the lock lever 28. An arc-shaped long hole 30 to be inserted is provided, and an engagement hole 31 is formed at the end of the long hole 30.
[0006]
In the above hook, the operation lever 23 is prevented from swinging inward by the engagement of the pin 26 and the engagement hole 31, and the lock lever 28 is swung around the pin 27. Since it is necessary to open the opening of the collar portion 21 by swinging the operating lever 23 with the portion facing the pin 26, there is an advantage that it is safe.
[0007]
[Problems to be solved by the invention]
By the way, in the hook, since the inner diameter of the collar portion 21 is large and the angle formed by the operation lever 23 and the lock lever 28 is also large, it is easy to slip when the operation lever 23 and the lock lever 28 are simultaneously grasped with one hand. It is extremely difficult to continuously swing the levers 23 and 28 with one hand, and there is a disadvantage that the operability is poor.
[0008]
In addition, since the lock lever 28 is provided outside the hook body 20, an obstacle often collides with the lock lever 28 when the hook is engaged, and the lock lever 28 moves in the unlocking direction due to the collision. Since it swings, there is a problem in safety.
[0009]
In order to solve the problem, in the hook described in Japanese Utility Model Publication No. 5-9013, a lock lever is provided inside the hook body, and the tip of the lock lever is opposed to the inner surface of the tip of the operation lever. The swing in the opening direction is prevented.
[0010]
By the way, the hook described in the above publication has a structure in which a finger is inserted into a fingertip engaging window formed on the operation lever to swing the lock lever in the unlocking direction, and the fingertip engaging window is notched. In such a case, the engaged object such as the master rope with which the hook is engaged enters the fingertip engaging window and swings the lock lever in the unlocking direction and swings the operation lever in the opening direction. There is.
[0011]
The subject of this invention is providing the hook excellent in safety | security.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, the hook part is opened and closed from the inside at the rear end part of the hook body having the hook part at the tip, and is gripped together with the rear end part of the hook body. A rear end portion of an operating lever that swings in a direction to open the opening of the lever is swingably mounted, and a spring that deflects the operating lever in a direction in which the tip of the operating lever comes into contact with the inner surface of the front end of the flange portion is provided, The rear end of the lock lever that swings in the direction of releasing the lock of the control lever by preventing the control lever from swinging inward by abutting the tip against the inner surface of the tip of the control lever and pressing down with the fingertip Is attached to the central portion of the hook body so as to be swingable, and prevents the lock lever from swinging from the position where the tip of the lock lever faces the inner surface of the tip of the operation lever toward the inside of the collar. A stopper mechanism is provided, and a spring that deflects the lock lever in the direction in which the stopper mechanism operates is provided so that the operation lever is not swung in the opening direction by the fingertip when the lock lever is pushed down by the fingertip. The configuration is adopted.
[0013]
[Action]
As described above, since the lock lever is provided between the hook body and the operation lever, an obstacle does not collide with the lock lever, which is safe.
[0014]
In addition, since the tip of the lock lever is opposed to the inner surface of the tip of the operation lever to prevent the operation lever from swinging in the opening direction, the object to be engaged such as the master rope with which the hook is engaged is locked. Even if the lever collides and the lock lever is swung in the unlocking direction, the engaged object does not swing the operating lever in the opening direction. For this reason, the operation lever is held in a state in which the opening of the buttock is closed by the elasticity of the spring and is not opened and is safe.
[0015]
【Example】
Embodiments of the present invention will be described below with reference to FIGS.
[0016]
As shown in the figure, the hook body 1 has a flange 2 at the tip, and an operation lever 3 that opens and closes the opening of the flange 2 from the inside is provided on the inside of the hook body 1.
[0017]
The operation lever 3 has a pair of side plates 4 and 4, and the rear end portion of the side plate 4 is attached to the rear end portion of the hook body 1 by a pin 5 so as to be rotatable. A spring 6 is assembled between the operation lever 3 and the rear end of the hook body 1. The spring 6 presses the operating lever 3 outward, and the tip of the operating lever 3 abuts against the inner surface of the tip of the hook 2 by the pressing, thereby closing the opening of the hook 2.
[0018]
A lock lever 7 is provided between the operation lever 3 and the hook body 1. The lock lever 7 has a pair of side plates 8, and the rear end portions of the side plates 8 are rotatably attached to the hook body 1 by pins 9. The lock lever 7 prevents the operation lever 3 from swinging in a direction to open the opening of the flange portion 2 in a state where the front end faces the inner surface of the front end portion of the operation lever 3.
[0019]
The operation of the stopper mechanism 10 prevents the lock lever 7 from swinging from the position facing the inner surface of the distal end portion of the operation lever 3 toward the inside of the flange portion 2.
[0020]
The stopper mechanism 10 includes a stopper piece 11 provided on the inner surface of the distal end portion of the operation lever 3, and the operation lever 3 is prevented from swinging toward the flange portion 2 by contact with the stopper piece 11.
[0021]
Instead of the stopper piece 11, the rear end of the lock lever 7 can be brought into contact with the inner edge of the hook body 1, and the lock lever 7 is directed from the lock position to the inside of the flange portion 2 by contact with the inner edge. May be prevented from swinging. A spring 12 is attached to the pin 9 that supports the lock lever 7, and the spring 12 deflects the lock lever 7 in a direction in which the tip of the lock lever 7 engages with the stopper piece 11.
[0022]
The hook with the safety device shown in the embodiment has the above-described structure, and this hook, like the conventional hook, swings the lock lever 7 and then swings the operating lever 3 so that the collar portion 2 is moved to the master rope or the like. To be engaged with the engaged portion.
[0023]
Now, when the rear end of the hook body 1 and the operation lever 3 are gripped, a fingertip is inserted inside the hook body 1 and the lock lever 7 is pushed down with the fingertip, the lock lever 7 swings around the pin 9. Thus, the tip of the operating lever 3 is separated from the inner surface of the tip of the operating lever 3, so that the lock of the operating lever 3 is released.
[0024]
Therefore, when the operation lever 3 is gripped, the operation lever 3 swings inward, the opening of the collar portion 2 is opened, and the collar portion 2 can be engaged with an engaged portion such as a master rope.
[0025]
When the grip of the operation lever 3 is released after the hook portion 2 is engaged with the engaged portion, the operation lever 3 swings outward due to the elastic force of the spring 6, and the tip portion is brought into contact with the inner surface of the tip portion of the hook portion 2. At the same time, the lock lever 7 swings toward the flange portion 2 due to the elastic force of the spring 12, and its tip end portion abuts against the stopper piece 11.
[0026]
At this time, since the distal end of the lock lever 7 faces the inner surface of the distal end portion of the operation lever 3, the operation lever 3 cannot be swung in the opening direction, and the operation lever 3 is in a locked state in which the opening of the flange portion 2 is closed. Retained.
[0027]
Further, even when the engaged object collides with the lock lever 7, only the lock lever 7 swings in the unlocking direction, and the operation lever 3 closes the opening of the flange 2 by the elasticity of the spring 6. Therefore, it is safe because the hook does not come off from the engaged object.
[0028]
【The invention's effect】
As described above, in the hook according to the present invention, even when the engaged object with which the hook is engaged collides with the lock lever, only the lock lever swings and the operation lever closes the opening of the hook. Since it is held in the state, the hook hook part does not come off from the engaged object, which is safe.
[0029]
In addition, since a lock lever is provided between the operation lever and the hook body, it is possible to prevent an obstacle from colliding with the lock lever, and the lock lever swings or deforms in the unlocking direction. Compared with a hook provided on the outside of the hook body, the lock lever is easier to grip and the operation lever is inserted, and one finger is inserted inside the hook body. Since the lock lever is swung, the hook can be opened and closed smoothly.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a hook according to the present invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
Reference Signs List 1 hook body 2 collar 3 operation lever 6 spring 7 lock lever 10 stopper mechanism 12 spring

Claims (1)

After the operation lever that swings in the direction to open the opening of the hook part by opening and closing the opening of the hook part from the inside at the rear end part of the hook body having the hook part at the tip and grasping it with the rear end part of the hook body A spring for deflecting the operating lever is provided so that the end of the operating lever is swingably mounted, and the tip of the operating lever is in contact with the inner surface of the front end of the flange. The operation lever is prevented from swinging inward, and the rear end of the lock lever that swings in the direction of releasing the lock of the control lever by pushing down with the fingertip is attached to the central portion of the hook body so as to be swingable. A stopper mechanism is provided to prevent the lock lever from swinging from the position where the tip of the lock lever faces the inner surface of the tip of the operation lever toward the inside of the collar, and this stopper mechanism operates. A spring for deflecting the locking lever in direction is provided, said lock lever upon operation of the lock release pressing down by fingertips, safety devices with hooks on the operating lever by the finger tip is prevented from being swung in the opening direction.

Images