Patent attributes
Provided is a rotary joint that allows a case body to be made compact. A rotary joint includes: a cylindrical case body having a plurality of first flow passages formed therein; a shaft body having a plurality of second flow passages formed therein; rolling bearings and provided in an annular space formed between the case body and the shaft body; a plurality of tubular members provided in the annular space and each having a third flow passage formed for connecting the first flow passage and the second flow passage; a first seal configured to prevent leak of a fluid flowing through the first flow passage and the third flow passage; and a second seal configured to prevent leak of a fluid flowing through the third flow passage and the second flow passage.
