A cable drum receives a length of working cable that is wound in and out from the drum in response to powered rotation of the drum with an uppermost layer of working cable on the drum forming a working surface. A torque sensor in communication with the cable drum measures a torque applied to the cable drum due to tension on the working cable from a load. A drum height gauge is provided for measuring a height of the working surface of the cable on the cable drum. A processor receives the torque value from the torque sensor and the height of the working surface from the drum height gauge and computes a force applied to the length of working cable due to the load based on the torque and height of the working surface. The work performed by the cable may be calculated to assist in determining cable health.

Embedded hoist human-machine interface

A method and equipment for detecting (210) with smart glasses (130) used by the operator (140) an target (150; 120) intended by the operator; detecting (220) a driving command given by the operator; and responsively to the detection of the driving command steering (230) the loading member (1 16) or the load (150) towards said target.

Controlling of lifting device

Systems and devices are described for measuring tension in a guide wire in a tower service lift for ascending and descending wind turbine generator towers. The present disclosure also describes methods for measuring the tension in the guide wire as well as installing a device for measuring the tension in the guide wire.

Guide wire tension loss sensor

A system includes multiple lifting devices, where each lifting device includes a drum to draw in or let out a line, and a motor and transmission coupled to the drum to apply a torque thereto. A grouping module is provided to group the lifting devices for synchronized operation. A synchronization module monitors an amount of line that is drawn in or let out from each of the lifting devices and, based on the amount, adjusts operating parameters (e.g., position, speed, etc.) of one or more of the lifting devices in the group to substantially synchronize the amount of line drawn in or let out with other lifting devices in the group.

Synchronized Motorized Lifting Devices for Lifting Shared Loads

A restraining roller of a hook winch has a roller middle part and first and second roller end parts. The roller middle part is formed in a columnar shape. Each of the first and second roller end parts is formed in a roughly circular truncated cone shape. The widths of the first and second roller end parts are greater than the diameter of a wire rope. A difference in diameter between an inner end and outer end of each of the first and second roller end parts is less than the diameter of the wire rope. Taper angles of the first and second roller end parts are different from each other.

Winch for pipelayer and pipelayer equipped with same

A drum tensioning method is provided for operating a crane having a continuously reeved load hoist line, with a first end of the load hoist line connected to a first drum and a second end of the load hoist line connected to a second drum, with the load hoist line reeved through boom sheaves and a hook block The method includes the steps of applying a hold-back force to the second drum; applying a winding force to the first drum greater than the hold back force on the second drum; and applying the winding and hold back forces while limiting movement of the hook block, thereby spooling the load hoist line from the second drum through the boom sheaves and hook block to the first drum while maintaining tension in the load hoist line such that the load hoist line is wound under more tension on the first drum than it had previously been wound on the second drum

Drum tensioning method and apparatus for load hoist wire rope

PROBLEM TO BE SOLVED: To provide a rope tension system capable of performing lifting when an object must be descended by a crane at a required work field. SOLUTION: In the drum tension application method, a first end part of a load rolling-up line 24 is connected to a first drum, a second end part of the load rolling-up line is connected to a second drum, and the load rolling-up line is rolled-up while passing through a boom sheave and a hook block 26. The method includes a step for applying keeping back force to the second drum; a step for applying larger rolling-up force than the keeping back force to the second drum to the first drum; and a step for applying the rolling-up force and the keeping back force while restricting movement of the hook block. Thereby, the load rolling-up line is rolled-up while maintaining the tension of the load rolling-up line while passing from the second drum to the first drum through the boom sheave and the hook block. As a result. the load rolling-up line is rolled-up on the first drum by larger tension than the tension that it is previously rolled-up on the second drum. COPYRIGHT: (C)2011,JPO&INPIT

Drum tension application method and device for load lifting wire rope

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Drum tensioning method and apparatus for load hoist wire rope

Drum tension application method and device for load lifting wire rope