WINCH APPARATUS HAVING AUTOMATIC TENSION FUNCTION

Title:

WINCH APPARATUS HAVING AUTOMATIC TENSION FUNCTION

Document Type and Number:

WIPO Patent Application WO/2019/093253

Kind Code:

A3

Abstract:

[Problem] To use pulleys and position sensors to automatically carry out the operations of winding up, winding out, and stopping and thereby easily add an automatic tension function to a generic winch, thus providing a low cost winch with a quick turn-around time. [Solution] Two pulleys across which a wire rope spans are configured such that the distance between the pulleys can be modified in accordance with the tension of the wire rope. If the tension increases, the distance between the pulleys decreases and a position sensor operates, as a result of which the winch shifts to winding out operation and the distance between the pulleys is increased by the action of force from rodless cylinders. If the tension decreases, the distance between the pulleys increases and a different position sensor operates, as a result of which the winch shifts to winding up operation and the distance between the pulleys decreases. These operations to let out and pull in the wire rope are performed repeatedly on the basis of the operation of the two position sensors, thereby controlling the tension of the wire rope to a constant tension.

Inventors:

URAKAMI FUKASHI (JP)

Application Number:

PCT/JP2018/040920

Publication Date:

July 04, 2019

Filing Date:

November 04, 2018

Export Citation:

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Assignee:

URAKAMI LLC (JP)

International Classes:

B66D1/50

Foreign References:

JP2003238080A	2003-08-27
JPS4319502B1	1968-08-23
JPS60234091A	1985-11-20
JPH01220696A	1989-09-04
JPH0445099A	1992-02-14

Other References: