Crane

Abstract

This crane includes: a travel body that has a travel motor; a turning body that is provided above the travel body and has an upper device; a transmission member that is provided between the travel body and the turning body; and a power source that is provided to the travel body and that supplies electric power to both the travel motor and the upper device. The transmission member includes: a swivel joint unit that constitutes a flow path for a fluid to be supplied from the travel body to the turning body; a weak-electric-system slip ring unit that constitutes a transmission path for a signal to be transmitted from the travel body to the turning body; and a strong-electric-system slip ring unit that constitutes a cable way for electric power to be supplied from the power source to the upper device.

Dependencies are inferred from the claim text.