A rotation lock device comprising: a stopper support member rotating integrally with a shaft-shaped member; a stopper member supported by the stopper support member in a state of being slidable; a holding means configured to hold the stopper member; an urging means configured to urge the holding means toward a first rotation direction with respect to the stopper member; and a stopper locking means configured to stop a rotation of the shaft-shaped member by engaging with the stopper member, wherein when the shaft-shaped member accelerates the rotation toward the first rotation direction, a holding force for the stopper member by the holding means is decreased and/or released by an inertial load of the holding means to cause the stopper member to project from the predetermined position to a position where the stopper member engages with the stopper locking means to thereby stop the rotation of the shaft-shaped member.

A winch apparatus includes a frame; a support coupler mounted to the frame at a support end; an axle mounted to the frame; a sensor connected to the axle, detecting strain in the axle, and outputting a corresponding signal; a spool rotatably disposed around the axle and including a ratchet wheel and a receiving surface; an elongate flexible member received on the receiving surface and secured to the spool; a handle to actuate the spool and increase tension on the elongate flexible member and including a grip end and a mounting end rotatably mounted to the frame; and a pawl mounted to the handle and positioned to actuate the ratchet wheel.

A winch apparatus includes a frame; a support coupler mounted to the frame at a support end; an axle mounted to the frame; a sensor connected to the axle, detecting strain in the axle, and outputting a corresponding signal; a spool rotatably disposed around the axle and including a ratchet wheel and a receiving surface; an elongate flexible member received on the receiving surface and secured to the spool; a handle to actuate the spool and increase tension on the elongate flexible member and including a grip end and a mounting end rotatably mounted to the frame; and a pawl mounted to the handle and positioned to actuate the ratchet wheel.

A handle-engaging assembly for releasably engaging a winch hoist handle in a winch hoist, where the winch hoist comprises a frame with an integral handle-receiving socket that is adapted to receive the handle. There is a pull pin assembly that comprises a spring-loaded pin that is constructed and arranged to be manipulated such that it engages with or disengages from an opening in the handle

A handle-engaging assembly for releasably engaging a winch hoist handle in a winch hoist, where the winch hoist comprises a frame with an integral handle-receiving socket that is adapted to receive the handle. There is a pull pin assembly that comprises a spring-loaded pin that is constructed and arranged to be manipulated such that it engages with or disengages from an opening in the handle

A winch apparatus includes a frame; a support coupler mounted to the frame at a support end; an axle mounted to the frame; a sensor connected to the axle, detecting strain in the axle, and outputting a corresponding signal; a spool rotatably disposed around the axle and including a ratchet wheel and a receiving surface; an elongate flexible member received on the receiving surface and secured to the spool; a handle to actuate the spool and increase tension on the elongate flexible member and including a grip end and a mounting end rotatably mounted to the frame; and a pawl mounted to the handle and positioned to actuate the ratchet wheel.

A winch apparatus includes a frame; a support coupler mounted to the frame at a support end; an axle mounted to the frame; a sensor connected to the axle, detecting strain in the axle, and outputting a corresponding signal; a spool rotatably disposed around the axle and including a ratchet wheel and a receiving surface; an elongate flexible member received on the receiving surface and secured to the spool; a handle to actuate the spool and increase tension on the elongate flexible member and including a grip end and a mounting end rotatably mounted to the frame; and a pawl mounted to the handle and positioned to actuate the ratchet wheel.

A winch puller includes a frame having two sideboards spaced from each other. Each of the two sideboards includes first and second ends. The frame further includes a first bracket connected to the first ends of the two sideboards. The frame further includes a second bracket connected to the second ends of the two sideboards. The first bracket includes an intermediate section. A first hook includes a connecting rod mounted to the intermediate section of the first bracket. The first bracket is located between the first hook and the two sideboards. The connecting rod is an integral one-piece member. A ratchet wheel is rotatably mounted between the two sideboards by an axle. A lever is mounted to the axle.

An arrangement for aligning a raised load has a rigid carrier element and tension cords secured to and extending down from the carrier element. The lower ends of the tension cords are provided for securing at load engagement points on the load. One tension cord has a length adjustment device extending between upper and lower connection points. The length adjustment device has a housing pivotably secured to the upper connection point. A drive shaft is mounted rotatably in the housing. A drive wheel, a friction disc brake, a load wheel, and a gear mechanism, coupling the drive shaft to the load wheel, are arranged on the drive shaft. The load wheel has over its circumference chain link cavities for individual chain links of a chain sling guided around the load wheel. The chain sling is secured by one of its ends at the lower connection point.

An arrangement for aligning a raised load has a rigid carrier element and tension cords secured to and extending down from the carrier element. The lower ends of the tension cords are provided for securing at load engagement points on the load. One tension cord has a length adjustment device extending between upper and lower connection points. The length adjustment device has a housing pivotably secured to the upper connection point. A drive shaft is mounted rotatably in the housing. A drive wheel, a friction disc brake, a load wheel, and a gear mechanism, coupling the drive shaft to the load wheel, are arranged on the drive shaft. The load wheel has over its circumference chain link cavities for individual chain links of a chain sling guided around the load wheel. The chain sling is secured by one of its ends at the lower connection point.