JPH11255485A - Preventing device for irregular winding and reverse winding in electric winch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability by preventing an irregular winding and a reverse winding from being generated in a wire rope, relating to a device preventing the irregular winding and reverse winding of the wire rope in an electric winch. SOLUTION: A swivel plate 12 is supported rotatively on a side wall of a drum 10, and a rotary unit 13 is provided rotatively on one end of the swivel plate 12. The rotary unit 13 receives pressing so as to press the periphery of a wire rope 17 wound on to the drum 10 by a spring 14 arranged in a side wall of a housing 19. In this way, by applying a load to the wire rope 17 even in a condition of no-load, the wire rope 17, even when it is lowered, is prevented from loosening, an irregular winding and a reverse winding can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing a wire rope from being wound or reversed in an electric winch.

[0002]

2. Description of the Related Art FIG. In the conventional turbulence prevention device, the wire rope 20 is usually guided by a rotating body 21 to perform hoisting and lowering. When the wire rope 20 becomes loose, the wire rope 20 comes off the rotating body 21 and comes into contact with the actuator 22 of the limit switch 24, and the limit switch 24 operates to automatically stop the lowering operation ( For example, Japanese Utility Model Application Laid-Open No. 4-135584
No.).

[0003]

In the above prior art, the detection device is used after the wire rope 20 has slackened. When the slack is detected, only the core 23 around which the wire rope 20 is wound rotates, and the wire rope 20 is wound. The rope 20 is in a state of turbulence. For this reason, all the wire ropes 20 have to be rewound, and the work has been time-consuming.

[0004] It is an object of the present invention to eliminate the above-mentioned disadvantages of the prior art and prevent the occurrence of wire rope turbulence.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric winch in which a motor is used to rotate a drum forward and reverse to wind up and down a wire rope. The swinging plate is provided with a rotating body at one end thereof, and the rotating body is provided in the housing with a spring for applying an appropriate pressure to the outer peripheral surface of the wire rope wound on the drum. You.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side sectional view of an electric winch, and FIG.
FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view when the wire rope 17 is excessively wound.

As shown in FIG. 2, the gear 3 on the end face of the shaft 2 of the motor 1 meshes with the gear 3, and a brake mechanism 4 and a pinion 5 are arranged coaxially with the gear 3. Pinion 5
Is meshed with the gear 6, and a pinion 7 is disposed coaxially with the gear 6. The pinion 7 meshes with a gear 8, and the gear 8 is fixed to a drum shaft 9 having a drum 10 fixed to an end face.

As described above, when the motor 1 rotates forward and backward, the drum 10 rotates forward and backward via each pinion and gear. The drum 10 is supported by a housing 19, and a support hook 11 is mounted on the housing 19.

The housing 19 has a swinging plate 1 in the shape of "H".
2 is supported, and a rotating body 13 is rotatably provided at one end of the rocking plate 12. A spring 14 is fixed to a side wall of a housing 19 with a fixing member 18 so that the rotating body 13 applies an appropriate pressure to the outer periphery of the wire rope 17 wound around the drum 10. Even when there is no load, since an appropriate load is applied to the wire rope 17, even when the wire rope 17 is lowered, the wire rope 17 is not loosened. Therefore, it is possible to prevent the wire rope 17 from being randomly wound.

If the drum 10 rotates too much even if the entire wire rope 17 is lowered, the wire rope 1
Since the winding 7 is reversed, a detector A15 is provided so as to be in contact with the other end of the swinging plate 12. When the wire rope 17 is wound down as shown in FIG. 1 and the drum 10 is substantially in the state, only the drum 14 is pressed.
2 moves in the direction B, and the other end of the oscillating plate 12 is
, The rotation of the motor 1 stops, and the drum 10 also stops at the same time.

Conversely, a detector B16 is provided so as to be in contact with the other end of the oscillating plate 12 so that the drum 10 does not rotate too much even if the entire wire rope 17 is wound. When the wire rope 17 is almost wound up as shown in FIG. 3, the swinging plate 12 moves in the direction C, and the other end of the swinging plate 12 activates the detector B16. 1 stops, and the drum 10 also stops at the same time.

[0012]

According to the present invention, since the wire rope is constantly pressed, even when the wire rope is lowered under no load, the wire rope does not loosen and does not wind up.
Also, it is possible to prevent reverse winding due to excessive lowering and excessive winding.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an electric winch showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating a state during a lower limit stopper operation, taken along the line AA in FIG. 1;
It is a line sectional view.

FIG. 3 is a diagram illustrating a state during an upper limit stopper operation, taken along the line AA in FIG. 1;
It is a line sectional view.

FIG. 4 is a side sectional view of a conventional electric winch.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Motor, 10 ... Drum, 12 ... Rocking plate, 13 ... Rotating body, 14 ... Spring, 15 ... Detector A, 16 ... Detector B,
17: wire rope, 18: fixing member.

Claims (3)

[Claims] 1. A drum is rotated forward and backward by a motor,
In an electric winch for hoisting and lowering a wire rope, a swing plate is rotatably supported by a housing for rotatably supporting the drum, and a rotating body is provided at one end of the swing plate, and the rotating body is attached to the drum. A device for preventing irregular winding and reverse winding of an electric winch, wherein a spring for applying an appropriate pressure to an outer peripheral surface of a wound wire rope is provided in the housing. 2. The electric winch according to claim 1, further comprising a detector provided at the other end of the rocking plate for detecting excessively lowering of the wire rope in the housing. Prevention device. 3. The electric winch according to claim 1, wherein a detecting device for detecting excessive winding of the wire rope is provided at the other end of the swinging plate. apparatus.