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 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.

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.

A brake device comprising: a brake receiver pivotally supported in a non-rotatable manner on the drive shaft and including a flange part and a boss part; a female screw member pivotally supported in a rotatable manner on the drive shaft and screwed to a male screw part; a ratchet wheel including ratchet teeth provided on an outer peripheral side and configured to restrict a rotation direction to one direction; a brake plate arranged between the ratchet wheel and at least one of the flange part and the female screw member; and at least one pawl member engaging, on a tip side, with a valley part located between adjacent ratchet teeth, and meshing with the ratchet tooth, wherein the ratchet teeth include tall teeth and short teeth lower in projection height from a rotation center of the ratchet wheel than the tall teeth.

A brake device comprising: a brake receiver pivotally supported in a non-rotatable manner on the drive shaft and including a flange part and a boss part; a female screw member pivotally supported in a rotatable manner on the drive shaft and screwed to a male screw part; a ratchet wheel including ratchet teeth provided on an outer peripheral side and configured to restrict a rotation direction to one direction; a brake plate arranged between the ratchet wheel and at least one of the flange part and the female screw member; and at least one pawl member engaging, on a tip side, with a valley part located between adjacent ratchet teeth, and meshing with the ratchet tooth, wherein the ratchet teeth include tall teeth and short teeth lower in projection height from a rotation center of the ratchet wheel than the tall teeth.

A hand operated pulling and lifting hoist includes: a change gear that engages with a switching pawl fitting provided for an operation lever to convert a manual force applied to the operation lever into a hoist driving force; a fixed support ring disposed for the rotatable mounting of the operation lever about a driving member that is set about the drive shaft to transmit the hoist driving force to the drive shaft; a pivotable support ring formed on the operation lever and rotatably fitted to an internal circumference of the fixed support ring; and a driving-member contact prevention part on the change gear to prevent contact between the pivotable support ring and the driving member.

A hand operated pulling and lifting hoist includes: a change gear that engages with a switching pawl fitting provided for an operation lever to convert a manual force applied to the operation lever into a hoist driving force; a fixed support ring disposed for the rotatable mounting of the operation lever about a driving member that is set about the drive shaft to transmit the hoist driving force to the drive shaft; a pivotable support ring formed on the operation lever and rotatably fitted to an internal circumference of the fixed support ring; and a driving-member contact prevention part on the change gear to prevent contact between the pivotable support ring and the driving member.

The Wedge-Lock Safe-T-Puller is a tool that provides a safe and simple way to extract a T-post. The tool uses a captured sliding shackle that travels along a wedge to provide a positive grip between the bumps on a T-post and the Post Alignment Groove on the post side of the Wedge-Lock. Using a lifting shackle or sling attached to the lifting eye at the top of the tool, force is exerted vertically, causing the tool with its wedge to slide up the T-post thereby tightening the sliding shackle against the front of the T-post. This sliding action causes the wedge and sliding shackle to “lock” together to grip the T-post. The greater the force applied, the tighter the wedge and shackle grip. The Wedge-Lock Safe-T-Puller is intended to be operated with mechanical lifting equipment such as a front-end loader, track hoe, backhoe, Skid Steer Loader, etc. The tool may also be used in conjunction with lever and stand type manual or hydraulic extractors.

A lever hoist includes a housing in which a load chain wheel and a driveshaft driving the load chain wheel are mounted, as well as a safety brake. A load chain is movable via the load chain wheel. The safety brake brings about an emergency braking in the event of excessive rotational speed of the driveshaft. The safety brake has a locking disc with teeth and a control disc with control cams. The locking disc and the control disc are rotatable in relation to one another in a limited manner. A catch hook is movable in a swivelling manner and has a latch contour and a sensing contour. The sensing contour rests on the control. In response to exceeding a defined rotational speed, the sensing contour lifts off the control disc. The latch contour rotates towards the locking disc and engages with a locking tooth of the locking disc.