KR102171193B1 - A hook with a mechanical crash prevention device during wire break of a single wire type hoist - Google Patents

Abstract

The present invention relates to a single wire type hoist with a hook formed to raise and lower the load body to move the load body while the wire is wound and unrolled, and the wire is smoothly rotated when the load body is raised and lowered by the hook. In a hook comprising a drum-shaped sheave to be released and wound:
When the wire breaks, a sudden increase in rotational speed of the sheave 115 and an instantaneous acceleration are sensed, and the flowing fluid strikes the ball that was stopping the springs 111-1 and 111-2 to separate the springs 111-1,111. -2) When the wire pressing parts 112-1 and 112-2 operate while pressing the wires from both sides of the sheave 115 and failing from one side, press the other side to fix the sheave to prevent the hook from falling. It relates to a hook formed to prevent falling when the wire is broken, characterized in that.

Description

A hook with a mechanical crash prevention device during wire break of a single wire type hoist}

The present invention relates to a hook formed with a mechanical fall prevention device when the wire breaks in a single wire type hoist,

More specifically

In a single wire type hoist, a hook is formed to lift and lower the load to move the load while the wire is wound up and down as it is unwound, and the wire is smoothly unwound and wound while rotating when the load is raised and lowered by the hook. In the hook comprising a drum type sheave:

When the wire breaks, a sudden increase in rotational speed of the sheave 115 and an instantaneous acceleration are sensed, and the flowing fluid strikes the ball that was stopping the springs 111-1 and 111-2 to separate the springs 111-1,111. -2) When the wire pressing parts 112-1 and 112-2 operate while pressing the wires from both sides of the sheave 115 and failing from one side, press the other side to fix the sheave to prevent the hook from falling. It relates to a hook formed to prevent falling when the wire is broken, characterized in that.

delete

delete

delete

delete

Fall prevention devices such as electric or air type are installed in the crane itself to prevent fall accidents due to the breakage of the wire of the crane, but these fall prevention devices are mainly installed on double wire type hoists, and single wire type hoists are fall prevention devices. Was not able to be installed, and due to this, physical and human damage is occurring due to a wire breakage and fall.

In the present invention, in order to prevent a fall when a wire of a single wire type hoist is broken, the electric and electronic method is excluded from the hook for suspending the load, and a fall prevention device that operates mechanically is formed. Is formed so that the hook is suspended from the unbroken wire by hitting the ball to stop the spring while the spring is operated, and the wire pressing part squeezes the wire to the sheave to prevent the hook from falling on the unbroken wire. Since the pressing operation must be operated, it is formed in a mechanical type with excellent safety and agility, excluding electrical and electronic methods to prevent malfunction.

As a prior art, a configuration in which two hooks are formed to prevent fall by forming two hooks in Utility Model Registration No. 20-0232990 is disclosed, but two hooks are used to prevent wire breakage due to the flow of the load body.

In order to prevent the single wire type hoist from falling when the wire is broken, when the wire is broken, the rotational speed of the sheave is instantaneously accelerated, and the wire is compressed and fixed to the sheave by a wire pressing unit that operates instantly. It is an object of the invention to provide a hook formed with a mechanical fall prevention device formed so that the load body is suspended from falling.

In order to achieve such an object, the present invention provides a hook formed to raise and lower a load body to move the load body while moving up and down as the wire is wound and unwound in a single wire type hoist, and a hook formed to raise and lower the load body on the hook. In the hook comprising a drum-type sheave to smoothly unwind and wind the wire while rotating when:

When the wire breaks, a sudden increase in rotational speed of the sheave 115 and an instantaneous acceleration are sensed, and the flowing fluid strikes the ball that was stopping the springs 111-1 and 111-2 to separate the springs 111-1,111. -2) When the wire pressing parts 112-1 and 112-2 operate while pressing the wires from both sides of the sheave 115 and failing from one side, press the other side to fix the sheave to prevent the hook from falling. It relates to a hook formed to prevent falling when the wire is broken, characterized in that.

delete

delete

delete

delete

The double wire type hoist has a fall prevention device installed on the hoist body when the wire breaks, but the single wire type hoist falls off with the hook detached when the wire is broken, so it was not possible to install a fall prevention device until now.

In the present invention, the principle of a mechanical fall prevention device installed to prevent a fall when falling from an elevator, etc., is formed directly on a hook that suspends a load in the air. When the wire is cut, the rotation speed of the hook rapidly increases and the rotation speed at the moment of fall. The fluid flowing by the change separates the ball that stops the spring, and while the spring operates, the wire pressurizes the wire to the sheave to fix it.

Since two wire pressers are formed on both sides and operate, even if the wire presser installed on the broken side due to an instant fall fails to join, the wire presser installed on the unbroken side succeeds in pressing.

As described above, the present invention was able to prevent a fall when a wire breaks by implementing a mechanical fall prevention device directly on the hook of a single wire type hoist for lifting and lowering the load body and moving key.

In Registration No. 10-0848994, an elevator governor that prevents an elevator from falling is known by a pressing device that operates by a change in rotational speed by installing a sheave on a fixed base installed on the roof of a building, etc., and the present invention is the same as the governor principle. Therefore, the detailed description of the governor is omitted.

The present invention implements a mechanical fall prevention device on a hook that moves up and down by walking a load on a single wire type hoist, so that the hook on the non-breaking wire is suspended by an instantaneous operation from breaking the wire to pressing. This fall prevention device can be applied not only to a hoist hook but also to a single wire type crane hook that works similarly, and this fall prevention function prevents damage to property and personnel caused by a hook fall accident due to wire breakage. It greatly contributes to the prevention of safety accidents.

Figure 1: shows an embodiment of the fall prevention device formed on the hook of the present invention.

As shown in Figure 1, the single wire type hoist is formed so that one wire 136 descends from the hoist, is wound around the sheave 115, and rises back to the hoist, so that when the wire is broken, the hook is separated even if the wire is fixed in the hoist. Because it falls, a fall prevention device is implemented on the hook itself.

When a break occurs in one of the wires, the sheave 115 falls and the rotational speed is instantaneously accelerated, and the catch 113 senses this instantaneous acceleration and separates the flowing fluid by striking the ball that was stopping the spring. When is separated, the springs 111-1 and 111-2 are operated and the wire pressing units 112-1 and 112-2 are operated to press the wire to be fixed to the sheave.

It goes without saying that the present invention can be embodied in a hook that lifts and moves a load in a device having a similar structure such as a crane as well as a hoist.

The configuration of the present invention is not limited to the above embodiments, and includes various embodiments that can be implemented within the general technical scope.

111-1,111-2: spring 112-1,112-2: wire press 113: catch 115: sheave 136: wire

Claims (1)

In a single wire type hoist, a hook is formed to lift and lower the load to move the load while the wire is wound up and down as it is unwound, and the wire is smoothly unwound and wound while rotating when the load is raised and lowered by the hook. In the hook comprising a drum type sheave:

When the wire breaks, a sudden increase in rotational speed of the sheave 115 and an instantaneous acceleration are sensed, and the flowing fluid strikes the ball that was stopping the springs 111-1 and 111-2 to separate the springs 111-1,111. -2) When the wire pressing parts 112-1 and 112-2 operate while pressing the wires from both sides of the sheave 115 and failing from one side, press the other side to fix the sheave to prevent the hook from falling. Hook formed to prevent falling when the wire breaks characterized.

Images