JPS61257889A - Automatic release hook - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an automatic release hook used when lifting heavy objects such as cranes, winches, and the like.

<Prior art> Generally, when lifting a heavy object, moving it to a predetermined location, and unloading it, it is necessary to remove the crane hook from the hook of the crane, etc., from the sling wire, the engagement hook of the container, or the eye bolt. However, in the past, for example, when carrying out port cargo handling work, settling fish reefs in the sea, or dumping heavy objects into a rift, disengaging the hook is a dangerous and difficult task, so it is difficult to remove the load. There is a known mechanism in which one end of the operating wire is locked to a pin or cam that clamps the hook, and when unloading, the other end of the wire is pulled manually to release the clamp. It is being

<Problems to be solved by the invention> However, with the method of releasing the hook using a wire, it is necessary to follow the movement of the hook by winding the wire, which makes it difficult for the crane operator to operate the wire. In addition, there are problems such as the movement of the hook or impact causing the clamp release to malfunction.

<Means for Solving the Problems> The hook of the present invention for solving the above-mentioned problems has seven hooks 4 rotatably supported in the main body frame 1.
A clamp claw 4c forming a clamp surface 4b is provided on the outer periphery of the proximal end of the seven claws 4, and the back surface thereof is a cam surface having a clamp key operation surface 4d, and the tip contacts the clamp surface 4b. A slidingly movable clamp key 5 that engages, a belt spring 9 that slides and drives the clamp key 5, and a load that slides under a load and causes the force storage spring 9 to store force for operating the clamp key. The present invention is characterized in that a transmission block 6 is housed within the main body frame 1.

<Function> In the automatic release hook of the present invention, the clamp key 5 is moved to the clamp position after the seven hook 4 is reversely rotated by a certain angle past its load position A2, and the seven hook 4 is returned to the load position A2. By doing so, the clamp key 5 and the clamp claw 4c of the 7-piece 4 are brought into contact engagement, and by applying a load to the 7-piece 4 and the load transmission block 6, the load transmission block 6 is slid, and the clamp key 5 is applied to the force storage spring 9. 5 is stored, and in this state, the 7 hook 4 is in a state where it receives the entire load of the cargo in the direction of forward rotation.

When the load applied to the 7-crew 4 becomes unloaded due to unloading, etc., the clamping surface 4 of the clamp key 5 and the 7-crew 4
The contact friction with b suddenly decreases, and the clamp key 5 slides in the clamp release direction due to the stored force of the power storage spring 9, the clamp of the hook 4 is released, and the 77 lever 4 rotates in the forward direction due to its own weight. The lifting lobes 18, eye bolt rings, and other locking parts that are locked to the hook 4 fall due to their own weight or the load of the load, and unloading is completed.

When setting the hook 4 to the load position, set the 7 hook 4 to the load position A.
By rotating 2 in the opposite direction until it exceeds a certain angle,
The clamp key 5 slides to a position where it can come into contact with the clamping surface 4b of the hook 4, and the clamping becomes possible.

<Example> To explain in detail the example shown below, FIGS. 1 to 3 are internal side views showing one example of the structure and operating state of the hook of the present invention. On the inner surface, four parts 2a to 2f are formed so that each part described below can rotate or slide while maintaining a constant state as necessary,
Seven hooks 4 are rotatably supported by a pongee 3 in the lower end recess 2a.

The tip of the seven hooks 4 forms a hanging portion 4a that protrudes from the main body 1, and a clamp claw 4c that forms a clamp surface 4b is provided at the rear upper portion of the base end, and a clamp key operation surface 4d is provided on the back side of the hook 4. The outer periphery of the proximal end of the hook forms a cam surface.

A clamp key 5 that can be raised and lowered is accommodated in a vertically straight concave portion (keyway) 2b connected to the fourth part 2a on the shaft 3 of the seven hooks 4, and a load transmission block is placed above the four part 2b. 4 parts 2 that accommodate 6 in a freely sliding manner up and down
c are consecutively provided.

A cylindrical spring case 7 is connected to the upper end of the clamp key 5, and a cylindrical spring case 7 is provided at the lower end of the spring case 7.
A flange-shaped spring receiver 8 is attached, a force storage spring 9 is mounted on the outside, and a connecting rod 10 connecting the load transmission block 6 is inserted at the upper end.

On the other hand, a straight groove-like recess 2d running in the same direction as the four-part 2b is formed at the rear of the four parts 2b, and inside the groove-like recess 2d, the lower end contacts the operation surface 4d of the seven hooks 4 and slides up and down. A slide rod 11 is housed therein.

Further, a clamp rod 12 for engaging and disengaging the block is accommodated in a recess 2e that is horizontally open on the back surface of the load transmission block housing recess 2c, and is slidable with the rear end of the clamp rod 12. The upper end of the rod 11 is connected to the link 13 within the link actuation recess 2f,
The vertical movement of the slide rod 11 and the horizontal movement of the clamp rod 12 are interlocked with each other. The clamp rod 12 is equipped with a spring 19 that always urges the lock l'12 toward the fourth portion 2c.

A hole 14 is provided at the rear of the lower end of the main body 1 into which one end of a lifting rope 18 is inserted, and the load transmission block 6 is also provided with a link-shaped suspension ring 15 (see FIGS. 4 and 5) and a bottle-shaped Hanging hole 16 into which a locking rod (not shown) etc. is inserted
is installed protrudingly.

Reference numeral 17 denotes a stopper provided on the main body 1 to prevent the other end of the lifting rope 18, which is secured to the lifting portion 4a of the 7-piece 4, from falling off during work, and is usually protruded outward by a spring or the like. The lobe hook is structured so that it rotates inward when pushed from the outside, and returns to its original position after being released.

As mentioned above, a flat cover 20 that closes the open surfaces of the four parts 2a to 2f is attached to the side surface of the main body 1 which accommodates various parts in the recesses 2a to 2f, and this cover 20 allows the recesses 2a to 2f to be It becomes a more sealed state, and each of the four parts can be filled with grease or the like to provide lubrication, as well as to prevent seawater and other foreign substances from entering.

Next, the operation of the hook of the present invention will be explained based on Figs. 1 to 4. When the 7th hook 4 in Fig. The surface 4c pushes up the slide rod 11 in the direction b, and at the same time operates the clamp rod 12 in the direction C, causing the load transmission block 6 and the clamp key 5, which were locked at the tip of the rod and located above, to fall in the direction d, and When the claw 4 is rotated in the C direction to return to the posture A2, the tip of the clamp key 5 comes into contact with the clamp surface 4b of the clamp claw 4c, and the link 4 is clamped and becomes ready for loading.

From the state shown in FIG.
1 is hung on the suspension ring 15 and the crane 7tsuk 21 is raised, the load transmission block 6 moves upward in the h direction,
Along with this, the direct connection rod 10 operates in the i direction, but since the clamp key 5 is engaged with the pawl 4c and receives a load, it does not rise, and the force storage spring 9 is pressed and the clamp key 5 is pulled up. Accumulate energy in the direction.

With the clamp 4 in position A2, the tip of the clamp rod 12 moves in the f direction by the spring 19, and the fourth part 2c
(At the same time, the slide rod 11 is lowered in the g direction.) However, when the load transmission block 6 is raised in the 11 direction, one end of the load transmission block 6 is pushed in, and after passing, the lower end of the clamp rod 12 is re-projected. It is locked and clamped at the tip.

In the state shown in Fig. 2, loading and unloading using the 7-crew 4 progresses, and when the 7-crew 4 is lowered and becomes unloaded, the clamp key 5 is raised in the direction 11 by the force storage spring 9, and the clamp claw 4c Now that the clamp key 5 has been removed, lift the hook body 1 and the 7 hooks 4 will be released! The rope 18 rotates in the forward direction, changes from A3 to A4, and the rope 18 automatically falls and comes off.

FIG. 6 shows another embodiment of the present invention, and in this example, the load transmission block 6 has contact with the operation surface 4d, which is a cam surface of the rotating hook 4, and a hole provided in the load transmission block 6. 14 (the lifting hole 16 is formed directly in the main body and the cover), and the lifting rope 18 is passed through the lifting rope 18 for sliding operation. A rack portion 6a is carved on one side of the load transmission block 6, and teeth 22a that engage with the rack portion 6a are carved on a part of the circumferential surface to operate a spring that rotates when the load transmission block 6 slides. A cam 22 is provided.

Furthermore, the force storage spring 9 is a leaf spring that contacts the circumferential surface of the cam 22, has one end fixed inside the main body 1, and the other end fixed to the side surface of the clamp key 5, and rotates the cam 22.
That is, this is a mechanism in which the leaf spring is deflected by the load transmission block 6 sliding under load, thereby storing force for key sliding.

This 8! In the structure, the clamp key 5, which applies a load to the rope 18 in the state shown in FIG.
Power is stored in When the 7-piece 4 is in an unloaded state, the clamp key 5 slides upward by the power spring 9, and the 7
The clamp of the claw 4 is released, and the rope 18 is removed by rotating in the forward direction due to the weight of the claw 4. At the same time, the load transmission block 6 is slid up by the operating surface 4d, and then the seven hooks 4 are rotated in the opposite direction, so that the seven hooks 4 are clamped in the load position as shown in FIG.

<Effects of the Invention> As a result of the above-described configuration of the present invention, once a load is applied to the hook by lifting a load, the clamped state of the hook is reliably maintained until the load is unloaded and the hook becomes unloaded. When it is lowered and the hook becomes unloaded, the hook is automatically released and the engagement of the rope etc. is released without requiring any other operation, allowing easy operation and safe and reliable work.

Further, unlike the conventional method, there is no need for means or manpower for releasing the 77-hour clamp, so the work efficiency and other economic efficiency are also very high.

[Brief explanation of drawings]

1 to 3 are side views showing the internal structure and operating condition of the hook of the present invention, FIGS. 4 and 5 are side views and front views showing the external appearance and operating condition, and FIG. It is a side view which shows the internal structure of the hook which shows an Example. 1 Near 7ri main body 2a - 2f: Recessed part 3: Pongee
4: Hook 4a: Hanging part 4b: Clamp surface 4c: Clamp claw 4d: Operation surface 5: Clamp key 6: Load transmission block 7: Spring case 8 Spring receiver 9: M cover spring 1o:
Connecting rod 11 Varnished rod 12: Clamp rod 13: Link 14: Hole 15: Suspension ring 16: Suspension hole 17: Retainer 18: Lifting rope 19 Nispring

Claims (1)

[Claims] 1) A rotatably supported hook is provided in the main body frame, and a clamp claw that forms a clamping surface is provided on the outer periphery of the proximal end of the hook, and a clamp key operation surface is formed on the back of the clamp claw. a clamp key that is slidably movable and whose tip has a cam surface that contacts and engages the clamp surface; a force storage spring that slides and drives the clamp key; and a clamp key that slides under a load and is attached to the force storage spring. The automatic release hook is provided with a load transmission block that stores power for operation and is housed within the main body frame.