US Patent No. 9,597,808

JOINT STRUCTURE CAPABLE OF OPTIMIZING MARGIN OF LENGTH OF UMBILICAL MEMBER, AND INDUSTRIAL ROBOT HAVING THE JOINT STRUCTURE


Patent No. 9,597,808
Issue Date March 21, 2017
Title Joint Structure Capable Of Optimizing Margin Of Length Of Umbilical Member, And Industrial Robot Having The Joint Structure
Inventorship Toshihiko Inoue, Yamanashi (JP)
Shunsuke Abiko, Yamanashi (JP)
Assignee Fanuc Corporation, Yamanashi (JP)

Claim of US Patent No. 9,597,808

1. A joint structure of an industrial robot, the industrial robot comprising:
an upper arm;
a forearm having a forearm base rotatably connected to the upper arm; and
an umbilical member extending from a lateral side of the upper arm and introduced to a lateral side of the forearm base,
wherein a motion range of the forearm relative to the upper arm is variable,
wherein the umbilical member has a margin of length corresponding to the motion range of the forearm, between the lateral
side of the upper and the lateral side of the forearm base, and

wherein the umbilical member has a length portion in addition to and adjacent to the margin of length for adjusting an overall
length of the margin of length corresponding to a change in the motion range of the forearm, the length portion being contained
in or held by the upper arm or the forearm base.