A lifting aid for an attic ladder includes a track system having a plurality of attachment means configured to secure about a corresponding number of attic ladder rungs. A hand winch is secured to the base of the device and is in mechanical operation with a tray which runs up and down the attic ladder to which the track system is secured.

A lifting device includes a drive, a speed change gear device arranged above the drive and configured to be rotatable by means of the drive, a transmission device connected to the speed change gear device and a lifting mechanism fixed in the transmission device, and the speed change gear device is fixed to a side wall of the transmission device. Under an action of the drive and a speed change of speed change gear device, a gravity of a weight suspended on the lifting device is converted, so that the weight is lifted under a small force. The lifting device can also be driven via an electric hand tool. In addition, a first transmission device and a second transmission device are provided with a safety device to lock the lifting device when reaching a top, so as to prevent the lifting device from slipping to cause injuries.

A hoist system that includes a hook; a cable connected to the hook; a motor configured to move the hook and the cable; and an overload protection device (OLPD) configured to limit loads imparted on one or more of the hook, the cable, and the motor. The hoist system further includes an overload protection device (OLPD) slip detection system configured to detect activation of the overload protection device (OLPD).

A rope swinging safety system that aims to eliminate the safety risks caused by a rope swinging process in rope cranes, automatically calculates the amount of swinging depending on the angle of the rope or the diameter of the safe working area, allows parameter adjustment manually or by a remote controller, prevents erroneous adjustments, prevents lifting process when a determined swinging limit is reached so that it can be adapted to different situations easily, and is capable of electronically transmitting to the remote controller, a device and a remote controller consist of the system.

A lifting apparatus for a highly-mounted device includes a main body installed at a predetermined height so that a drum for winding a wire rope and a first driving motor for giving a rotating force to the drum are installed thereto; a lifting body suspended from the wire rope and having a device coupling portion provided at a lower end thereof; an accommodation structure located at a lower portion of the main body and having an open lower portion so as to be coupled with the lifting body; a stopper installed at the accommodation structure and caught by a suspending protrusion provided to the lifting body to give an anti-falling function for the lifting body; and an upper contact point and a lower contact point respectively installed at the main body and the lifting body to make contact with each other when the lifting body is moved up.

A lifting apparatus for a highly-mounted device includes a main body installed at a predetermined height so that a drum for winding a wire rope and a first driving motor for giving a rotating force to the drum are installed thereto; a lifting body suspended from the wire rope and having a device coupling portion provided at a lower end thereof; an accommodation structure located at a lower portion of the main body and having an open lower portion so as to be coupled with the lifting body; a stopper installed at the accommodation structure and caught by a suspending protrusion provided to the lifting body to give an anti-falling function for the lifting body; and an upper contact point and a lower contact point respectively installed at the main body and the lifting body to make contact with each other when the lifting body is moved up.

Monitoring the temperature of the brush of the motor on an electric winch during operation and restricting the operation of the motor within a cooling range in order to minimize downtime and maximize runtime.

Monitoring the temperature of the brush of the motor on an electric winch during operation and restricting the operation of the motor within a cooling range in order to minimize downtime and maximize runtime.

A low-power wire rope safety diagnosis method and a system thereof are provided. Since a sensor should be continuously turned on to allow a plurality of sensor nodes to diagnose safety of a wire rope in real time and it consumes much power, there is provided a method and system which can perform the safety diagnosis only when a movement is detected while being in a standby mode to reduce the power consumption, and determine a defect more correctly and consistently by utilizing deep learning when defects are determined through a wire rope safety diagnosis.

A low-power wire rope safety diagnosis method and a system thereof are provided. Since a sensor should be continuously turned on to allow a plurality of sensor nodes to diagnose safety of a wire rope in real time and it consumes much power, there is provided a method and system which can perform the safety diagnosis only when a movement is detected while being in a standby mode to reduce the power consumption, and determine a defect more correctly and consistently by utilizing deep learning when defects are determined through a wire rope safety diagnosis.