KR200155521Y1 - Overwire prevention device in crane and hoist - Google Patents

Abstract

The present invention relates to a crane (Crane) and hoist (Hoist) over-wound prevention device, in particular installed in the upper portion of the hook wheel (1), the lifting table 16 is coupled to the lower, free rotating roller 22 on the top 14 and the holder 15 is installed, the body 20 through which one side main wire rope 5 passes, and the lower end is connected to the lower one side of the body 20, the upper end of the control limit switch 19 Operation wire rope 17 is connected to the), and the lower end is connected to both ends of the body 20, respectively, the upper end is characterized in that it is composed of a power wire rope 18 connected to the power limit switch 21 Crane and hoist over-wound preventive device.

Description

Crane and hoist over-wound prevention device

1 is a side view of a crane and hoist over-wound device according to the prior art.

Figure 2 is a side view of a crane and hoist over-wound device according to the prior art.

Figure 3 is a side view of the crane and hoist over-wound device according to the present invention.

Figure 4 is a perspective view of the main portion of the crane and hoist over-wound prevention apparatus according to the present invention.

Figure 5 is a plan view of the main portion of the crane and hoist over-wound device according to the present invention.

* Explanation of symbols for main parts of the drawings

1: hook wheel 2: limit switch

3: hoist control unit 4: hook

5: Main wire rope 7: Limit switch weight

8: hoist 9: holder

10: fixed wire rope 11: limit switch

12: striker 13: limit switch weight

14 roller axis 15 holder

16: lift 17: working wire rope

18: power wire rope 19: control limit switch

20: body 21: power limit switch

22: free rotation roller

The present invention relates to a crane and hoist over-wound prevention device, in particular, when limiting the hoisting and unloading operation distance of the crane and hoist, the first limit to the cam limit switch (Cam Limit Switch), It is related with the crane and hoist over-wound prevention device which is installed and used to emergency stop by the second limit switch when the over-wound occurs.

Conventionally, as shown in FIG. 1, when the operation is completed, the gap between the hoist 4 and the hook wheel 1 is narrow, and when the hoist 8 moves to the hoist side and stops, a slim phenomenon occurs for some reason such as a brake abnormality. If the hook wheel 10 is over-wound, a moment of deformation or breakage of the lever-type limit switch 2 is caused and the function of the limit switch is lost. There is a problem in that over-wound can not be prevented during the next operation.

In addition, as shown in FIG. 2, when the holder 9 is detached or shakes during operation, the limit switch weight 7 moves out of the striker 12 and overwound without emergency stop. Various problems, such as (9) is squeezed and broken between the main wire rope 5 and the hook wheel (1) occurs.

The present invention can solve the conventional problems as described above, can completely stop the equipment in an emergency to prevent the damage of the equipment itself even if a significant over-wound occurs, the crane and hoist that can ensure the operation of the equipment normally The purpose is to provide an over-wound prevention device.

In order to achieve the above object, the present invention is installed on the upper part of the hook wheel, and a lifter is coupled to the lower part, and a free rotating roller and a holder are installed on the upper part, and the main main rope is passed therebetween, and the lower part is the above. It is connected to one of the lower side of the body, the upper end is connected to the control limit switch, the operating wire rope, the lower end is connected to both ends of the body, the upper end is characterized by consisting of the power wire connected to the power limit switch Provide crane and hoist over-wound prevention device.

The present invention will be described in detail with reference to the drawings.

Figure 3 is a side view of the crane and hoist over-wound device according to the present invention, Figure 4 is a perspective view of the main part of the crane and hoist over-wound device according to the present invention, Figure 5 is a crane and hoist over-wound system according to the present invention A plan view of main parts of the prevention device.

The body 20 is formed so that the two sides of the plate shape is approximately socks shape spaced apart by the holder 15 and the lifting table 16 is installed to be located on the upper portion of the hook wheel (1), The lower end of the working wire rope 17 is connected to the front end of the left plate of the body 16 is coupled.

And the upper end of the operating wire rope (17) is connected to the coat roll limit switch 19, the control limit switch (19) has a built-in spring, when the operating wire rope (17) is loose, the hoist (8) by elasticity To stop the hoisting motion.

In addition, lower ends of the power wire ropes 18 are connected to both sides of the holder 15 positioned at the upper portion of the body 20, and the upper limit of the power wire ropes 18 is tightly coupled to the power limit switch 21. It is connected to be pulled.

At this time, when the power wire rope 18 is loosened, the power limit switch is operated by the elasticity of the spring embedded in the power limit switch 21, so that the main power is cut off, and then the hoisting operation of the hoist 8 is completely stopped.

On the other hand, the shaft 14 is coupled to the upper portion of the body 20 in parallel with the holder 15, and six free rotating rollers 22 are respectively attached to the shaft 14 so as to be rotatable and free. The right main wire rope 5 coupled to pass vertically between the rotary roller 22 and the holder 15 is moved up and down while contacting one or two of the centers of the free rotating rollers.

Here, when the hook wheel (1) is raised in the over-wound of the hoist (8), the free rotating roller 22 is rotated in contact with the outer peripheral surface and the right main wire rope (5) of the hook wheel, the rotation direction is the opposite direction This facilitates hoisting of the hookwheel.

The operation of the crane (Crane) and hoist (Hoist) over-wound prevention apparatus according to the present invention will be described with reference to FIGS.

When the hoist 8 is driven in the hoisting direction, the hook wheel 1 rotates and ascends, and finally comes into contact with the lower part of the limit switch weight 13 installed at the upper end.

At this time, the lifting wire 16 which is in contact with the upper portion of the hook wheel 1 is raised, the operation wire rope 17 is loosened, so that the control limit switch 19 is operated by a built-in spring, Using the operation signal as the hoist stop signal of the hoist 8 can prevent over-elevation.

Here, if the hook wheel (1) continues to ascend to the brake slim (Slip), etc. in spite of the operation of the control limit switch 19, the free rotation roller 22 is in contact with the main wire rope (5), the hook wheel in the opposite direction It turns.

When the free rotating roller 22 is raised, the two power wires 18 are loosened, and the power limit switch 21 is operated. As a result, the main power is cut off so that the hook wheel 1 is no longer raised. .

The present invention can completely shut down the equipment in an emergency to prevent the damage of the equipment itself even if a considerable over-wound occurs, and the operation of the equipment is provided with the accuracy of the usual equipment.

Claims (1)

The upper part of the hook wheel (1) is installed, the lifting table 16 is coupled to the lower part, and the free rotating rollers (22) and (14) and the holder (15) are installed on the upper side, and one side main rope (5) is disposed therebetween. The body 20 to be passed through, the lower end is connected to one side of the lower portion of the body 20, the upper end of the operation wire rope 17 is connected to the control limit switch 19, and the lower end both ends of the body 20 Crane and hoist over-wound device, characterized in that the upper end is composed of a power wire rope 18 connected to the power limit switch 21, respectively.