JPH06135676A - Crane hook slip-off preventing device - Google Patents

Abstract

PURPOSE:To provide a slip-off preventing device for a crane hook which can be installed completely, possesses the high safety and can be mounted and demounted speedily. CONSTITUTION:A crane hook slip-off preventing device is constituted of a crane hook 1, supporting point part 2 installed on the trunk of the crane hook, slip-off preventing metal fitting 6 which consists of a rod shaped metal fitting equipped with a handle and permits the revolution pushing-in/out through the supporting point part 2, and recessed part 7 which is formed in the crane hook top edge inner wall part into which the top edge of the slip-off preventing metal fitting 6 is fitted and can be mounted and demounted. Through, as for the conventional crane hook-off preventing device in, the slip-off preventing metal fitting intrudes, together with a suspended load, inside the hook, and is restrained because of the diameter of the suspended load, and can not be returned, and safety is not obtained, while in this application, the slip-off preventing metal fitting consists of a metal fitting equipped with a handle which can be revolved and pushed and pulled through a fulcrum point, and even in case of the suspended load having a large diameter, the prevention for the slip-off from a crane hook is secured speedily and safely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane hook retaining device. Specifically, it can be rotated and removed,
The present invention relates to a crane hook disengagement prevention device with improved convenience and safety.

[0002]

2. Description of the Related Art A conventional crane hook retaining device is
As shown in FIG. 4, a type has been used in which a retaining metal fits inside a hook together with a suspended load, and when the suspended load is attached to the hook, it returns to its original state by a spring.

In this case, if the diameter of the suspended load becomes large, the diameter of the suspended load interferes with the diameter of the suspended load, and the stopper metal does not return.

[0004]

The prior art has the problem that the retaining metal fittings do not function when the diameter of the suspended load increases, so that the present invention is fast and can handle suspended loads of large diameter. It is to propose a device that can safely prevent the crane hook from slipping off.

[0005]

In order to achieve the above object, the crane hook disengagement device according to the present invention is provided with a fulcrum portion on the crane hook body and a handle which can be rotated and pushed and pulled through the fulcrum portion. And a recess provided in the inner wall of the tip of the crane hook so that the tip of the retainer can be fitted and fixed.

Further, in order to securely fix the retaining metal, the fulcrum has a suction plate and the handle has a magnet catch.

1, 2, and 3 showing an embodiment of the present invention.
Follow along. The crane hook 1 is provided with a fulcrum portion 2 on the hook body, and the fulcrum portion is composed of a pin 4 and a collar 5 which are rotatably connected by a spring pin 3.

The stopper metal 6 has a substantially frame shape and is composed of a metal member with a handle which can be pushed and pulled through a guide hole provided in a collar 5 which constitutes the fulcrum portion 2 of the crane hook 1.

Further, a concave portion 7 is provided on the inner wall portion of the tip of the crane hook 1 so that the tip is fitted and fixed when the disengagement prevention metal fitting 6 is mounted. For the purpose of ensuring the mounting, a suction plate 8 is mounted on the fulcrum portion 2 of the crane hook 1, and a magnetic catch is provided on the handle portion of the disengagement stopper 6. The suction plate 8 has holes for inserting the pins 4 on both side surfaces, and is fixed to the fulcrum portion.

[0010]

[Operation] By providing a fulcrum portion on the crane hook body, and by making it a retaining device composed of a metal fitting with a handle that can be rotated and pushed through the fulcrum, when the tip of the metal fitting is fitted into the concave portion of the crane hook during mounting. (State (b) in FIG. 2) The magnet catch and the suction plate are in close contact with each other with the maximum suction force, so they are firmly fixed, and the disengagement stopper cannot be disengaged from the crane hook.

Further, when the metal fitting is pulled out (state (b) in FIG. 2), it is rotated by the own weight of the handle and the tip of the metal fitting is lifted up, which does not hinder the attachment / detachment of the suspended load.

[0012]

EFFECTS OF THE INVENTION By using the slip-off prevention metal fitting made of a metal fitting with a handle that can be rotated and pushed and pulled through a fulcrum portion, it is possible to prevent slipping off the crane hook quickly and safely even with a heavy load. Further, the retaining metal is attracted and fixed to the crane hook by the magnet at the set position.

[Brief description of drawings]

FIG. 1 is a schematic view of a crane hook of the present invention.

FIG. 2 is a schematic view of a crane hook and a crane hook retaining device according to the present invention.

FIG. 3 is a schematic view of a crane hook and a crane hook disengagement prevention device as viewed in the direction of arrows a to a in FIG.

FIG. 4 is a conceptual diagram of a conventional crane hook and a crane hook disengagement prevention device in a state where a diameter of a suspended load is small.

FIG. 5 is a conceptual diagram of a conventional crane hook and a crane hook disengagement prevention device in a state where the diameter of a suspended load is large.

[Explanation of symbols]

 1 Crane hook 2 Support point 3 Spring pin 4 Pin 5 Collar 6 Detachment metal fitting 7 Recessed portion 8 Adsorption plate 9 Magnetic catch 10 Conventional crane hook 11 Conventional disengagement metal fitting ) The state where the stopper is open

Claims (2)

[Claims] Claims: 1. A crane hook, a fulcrum portion provided on the crane hook body, a slip-off prevention metal fitting made of a metal fitting with a handle that can be rotated and pushed and pulled through the fulcrum portion, and the tip of the slip-out prevention metal fitting can be inserted and removed. Crane hook disengagement device composed of a recess provided in the inner wall of the tip of the crane hook. 2. The retaining metal fitting is securely fixed,
The crane hook disengagement prevention device according to claim 1, wherein a suction plate provided at a fulcrum portion of the crane hook body, and a magnetic catch that attracts the suction plate are provided at the handle portion.