Embodiments disclosed herein relate to a protection device and/or system that may include a thimble capable of being placed over a transmission line, such as an electrical power cord, to provide protection in the form of cut resistance, abrasion resistance, and/or impact resistance. In some embodiments, a plurality of thimbles can be placed over the transmission line to form an overlapping arrangement to protect a desired length of the transmission line. While each thimble may be rigid, semi-rigid, and/or flexible, the arrangement can maintain flexibility to allow for many degrees of movement of the electrical power cord even as it is cladded in the protection system.

A permanent electromagnetic holder is provided with: a first magnet; a second magnet; and a coil, the first magnet being configured such that magnetic pole surfaces of different magnetic poles are oriented in a thrust direction of an axial center orthogonal to the attracting surface, the second magnet being configured such that magnetic pole surfaces of different magnetic poles are oriented in the thrust direction of the axial center and being disposed outside the first magnet, the coil being disposed between the first magnet and the second magnet, the first magnet, the second magnet, and the coil being arranged so as to overlap in the radial direction of the axial center, and an operation of switching an attraction ON/OFF state being carried out by switching a magnetizing direction of the first magnet through instantaneous energization of the coil when the attraction ON/OFF state is switched.

A permanent electromagnetic holder is provided with: a first magnet; a second magnet; and a coil, the first magnet being configured such that magnetic pole surfaces of different magnetic poles are oriented in a thrust direction of an axial center orthogonal to the attracting surface, the second magnet being configured such that magnetic pole surfaces of different magnetic poles are oriented in the thrust direction of the axial center and being disposed outside the first magnet, the coil being disposed between the first magnet and the second magnet, the first magnet, the second magnet, and the coil being arranged so as to overlap in the radial direction of the axial center, and an operation of switching an attraction ON/OFF state being carried out by switching a magnetizing direction of the first magnet through instantaneous energization of the coil when the attraction ON/OFF state is switched.

A piling machine includes a main body unit including a traveling device, a pile driver that performs piling, and a moving device that is connected to the main body unit and moves the pile driver. A control device performs piling while the traveling device is traveling (e.g., while the main body unit is moving). This reduces the number of times the traveling device stops, and thus, the number of times of acceleration and deceleration can also be reduced. In this way, energy efficiency can be improved.

The present disclosure relates to an apparatus and method for loading and unloading cargo of air mobility, in which cargo loading and unloading may be automated without the aid of human resources, as well as enabling loading and unloading of cargo in a required location without an air mobility landing. The apparatus includes a winch installed in a cargo hold of an air mobility, a multiarticulated robot arm suspended from the winch, and a gripper provided on an end of the multiarticulated robot arm and capable of gripping a container.

The present disclosure relates to an apparatus and method for loading and unloading cargo of air mobility, in which cargo loading and unloading may be automated without the aid of human resources, as well as enabling loading and unloading of cargo in a required location without an air mobility landing. The apparatus includes a winch installed in a cargo hold of an air mobility, a multiarticulated robot arm suspended from the winch, and a gripper provided on an end of the multiarticulated robot arm and capable of gripping a container.