Crane

A crane, comprising:

• a traveling body including first devices that serve to allow the traveling body to travel;
• and
• a swivel body swivelably supported on the traveling body and including second devices for achieving crane work, wherein:
• power feeding and communication are performed between the traveling body and the swivel body,
• the traveling body includes a power supply device, a lower transmission and reception device for feeding electrical power from the power supply device to the swivel body and for transmitting and receiving a data signal to and from the swivel body, and a lower controller that receives detected signals from the first devices and controls the first devices and the traveling body, and transfers the electrical power from the power supply device to the first devices and the lower transmission and reception device,
• the swivel body includes an upper transmission and reception device for receiving the electrical power fed from the lower transmission and reception device and for transmitting or receiving the data signal to or from the lower transmission and reception device, and an upper controller that receives detected signals from the second devices and controls the second devices and the swivel body and transfers electrical power received by the upper transmission and reception device to the second devices, and
• the receiving and feeding of the electrical power and the transmitting and receiving of the data signal between the lower transmission and reception device and the upper transmission and reception device are performed wirelessly.