JP2612431B2 - Ball removal hook - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sling and a ball removing hook for hanging a hanging base attached to a heavy object when moving the heavy object using a crane or the like.

[0002]

2. Description of the Related Art Conventionally,
In order to suspend heavy objects with a crane, wire ropes were entangled, bundled, slung, and lifted with simple hooks.

FIG. 5 is a diagram showing a simple hook.

Normally, the pawl is pressed against the hook member from the inside of the hook by the force of the spring. However, when hooking the hanging base, the pawl is manually pushed against the spring force inside the hook against the spring force. Hook the former on the hook.

When a suspended load is applied to the hook, a hook whose opening is closed by its own weight is also used. The hooks include, for example, Martec Hook (trade name), Latch Lock (trade name), and the like.

FIG. 4 is a diagram of these conventional hooks.

[0007] These hooks are provided with an unlocking lever as will be described later. When the hanging point of the suspended load is to be removed from the hook, the hanging lever must be manually operated to release the hanging point from the hook member. did not become. Therefore, when the height of the suspended load is high, the work of removing the hanging base is a work at a high place, which involves not only danger but also extremely low work efficiency.

The present invention has been devised in order to solve such a problem. Even if the height of the suspended load is high, the hook can be unlocked by pulling a pull cord from the ground. The present invention also provides a ball removing hook that can remove a hanging point of a suspended load.

[0009]

In order to solve the above-mentioned problems, an arm provided with an extension lever provided with a first pulley on a lock release lever of a conventional hook, and provided with a second pulley on a hook member. A is attached in the same direction as the hook release lever, and an arm B having a third pulley is attached to the annular portion of the lock member in the same direction as the hook release lever. On the opposite side, a hanging hook releasing claw is provided along the hook member, and the pulling line fixed to the arm A or the arm B is hung downward via the first pulley, the second pulley, and the third pulley.

[0010] From the ball removal hook holding the hanging point of the suspended load,
When releasing the hanging stand to lower the suspended load, loosen the tension of the suspended wire rope until the hanging stand does not apply a gravitational load to the hook member, and pull the pulling line from the ground to remove the hanging stand from the hook member. Shall be released.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 4 is a view of a conventional hook.

The hook is provided with a groove 1a in the upper part of the hook member 1.
The lock member 2 is inserted into the groove 1 a and pivotally attached to the hook member 1 with the pin 3. A projection 2b is provided on the pin 3 of the lock member 2, and an upper portion forms a ring 2a. In the groove 1a of the hook member 1, an unlocking lever 5 provided with a projection 5a, which is close to the pin 3 and meshes with the projection 2b of the hook member 2 with the pin 4, is pivotally mounted.

When a suspended load is applied, the suspension is locked by the lock member 2 due to the load applied to the ring 2a of the lock member 2 and the hook member. When removing the hanging base,
Loosen the wire rope suspended until the load is no longer applied to the hook member 1, press the lock release lever 5 downward from above to rotate the protrusion 5 a by hand, and rotate the lock member 2.
Is unlocked with the projection 2b, and the lock member 2 is rotated around the pin 3 to open between the hook member 1 and
Release the hanging base manually.

FIG. 1 is a view showing a state in which a suspended load is suspended by a ball removing hook of the present invention. The extension lever 7 provided with the first pulley 6 is added to the lock release lever 5 by bolting or welding on a conventional hook.

An arm A10 having a second pulley 8 is attached to the hook member 1 in the same direction as the extension lever 7.

An arm B11 having a third pulley 9 is attached to the ring 2a of the lock member 2 in the same direction as the extension lever 7.

Pull cord 1 fixed to the tip of arm A10
2 hangs downward through the third pulley 9, the second pulley 8, and the first pulley 6 in this order.

The lock member 2 is provided with a hanging base release claw 13 on the side opposite to the unlocking side so as to be along the hook member. The suspension release claws 13 may be provided on both side surfaces of the hook member 1.

The hook member 1 has a hanging base 14 for hanging a load.

FIG. 2 shows a state in which the suspended load is lowered from the state shown in FIG. 1 to the ground, for example, and the tension of the wire rope is relaxed.
It is a figure showing the state where lock was released.

FIG. 3 is a view showing a state in which the pull cord is further pulled from the state of FIG. 2, the lock member 2 is opened, and the hanging source release claw 13 pushes the hanging member 14 of the suspended load to remove it from the hook member 1. It is.

In order to smoothly pull the pull cord 12 in the release direction, a hole is formed in the arm A10, and the arm A10 penetrates through the hole and hangs down.

FIG. 6 is a diagram showing an example in which a precast concrete plate in which a suspension base is buried is moved by using a hook.

Further, in order to prevent the lock from being unnecessarily released when an inadvertent force or an unreasonable force acts on the towline 12, a safety device for the towline 12 to be cut or pulled out halfway. 20 is attached.

[0026]

The effects of the present invention are as follows.

When the suspended load is moved by a crane or the like, the use of the ball removal hook of the present invention eliminates the need for manual work at a high place to release the suspension base, even if the height of the suspended load is high. The suspension can be easily released simply by pulling the tow line from the ground. Therefore, safety of work can be ensured and troublesome manual work is avoided, which contributes to reduction of man-hours.

[Brief description of the drawings]

FIG. 1 is a view showing a state where a suspended load is suspended by a ball removing hook of the present invention.

FIG. 2 shows a state in which the suspended load is lowered from the state of FIG. 1 to the ground, for example, and the tension of the wire rope is relaxed, the pulling rope 12 is pulled, and the protrusion 5a of the lock release lever 5 is rotated to release the lock. FIG.

FIG. 3 is a view showing a state in which the pulling line is further pulled from the state of FIG. 2, the lock member 2 is opened, and the hanging base release claw 13 pushes the hanging base 14 of the suspended load and is detached from the hook member 1.

FIG. 4 is a view of a conventional hook.

FIG. 5 shows a simple hook.

FIG. 6 is a diagram illustrating an example in which a precast concrete plate in which a suspension base is embedded is transported using hooks.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hook member, 1a ... Groove, 2 ... Lock member, 2a ... Ring, 2b ... Projection, 3 ... Pin,
4 ... pin, 5 ... lock release lever, 5a ...
Projection, 6 first pulley, 7 extension lever, 8
2nd pulley, 9 ... third pulley, 10 ... arm A,
11: Arm B, 12: Pulling line, 13: Hanging hook release claw, 14: Hanging hook, 15: Crane hook, 16: Sling wire rope, 17: Shackle , 18 ... the ball removing hook of the present invention, 19 ... for example a precast concrete plate, 20 ... safety device

Claims (1)

(57) [Claims] An extension lever provided with a first pulley is attached to a lock release lever of a conventional hook, and a second member is attached to a hook member.
An arm A with a pulley is attached in the same direction as the hook release lever, and an arm B with a third pulley is attached to the annular portion of the lock member in the same direction as the hook release lever. Is provided on the side opposite to the unlocking side with a hanging release claw along the hook member, and pulls the towing line fixed to the arm A or the arm B downward through the first pulley, the second pulley, and the third pulley. A ball removal hook characterized by hanging on a hook.