US Patent No. 9,227,284

ROTARY TABLE DEVICE


Patent No. 9,227,284
Issue Date January 05, 2016 
Title Rotary Table Device
Inventorship Tomoya Itou, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 9,227,284

1. A rotary table device, comprising:
a case;
a motor stored in the case;
a table fixed to one end of an output shaft of the motor;
a discharge port discharging air from the inside of the case to the outside; and
a pressure regulating unit, wherein
the case has:
first and second spaces partitioned with a partitioning member;
a first air supply path supplying air to the first space;
a second air supply path supplying air to the second space; and
a check valve provided in the partitioning member, and wherein
the discharge port discharges the air from the second space to the outside of the case, and
the pressure regulating unit constantly regulates a pressure of the first space and a pressure of the second space to a pressure
higher than an outside pressure, and regulates the pressure of the first space to a pressure higher than the pressure of the
second space during a steady state, but regulates the pressure of the second space to a pressure higher than the pressure
of the first space at a certain timing.