SEALING DEVICE FOR JOINT SECTION OF ROBOT AND ARTICULATED ROBOT

PROBLEM TO BE SOLVED: To surely prevent the leakage of lubricant and dust from a driving mechanism assembled in a joint section of a robot and surely prevent the intrusion of foreign matter into the joint part from external environment of the robot. SOLUTION: This sealing device 10 provided to a first joint section 16 of a robot is formed with overlapped seal portions 116 and 118 having a multi-stage configuration, provided for a first driving mechanism 34. The first seal portion 116 is provided with a first contact seal element 122 sealing a first inter-member gap 120 defined adjacent to a lubricant retaining section (a vacant place 108a, a reducer 42 and bearings 44, 46 and 48) provided in the driving mechanism 34. The second seal portion 118 arranged outside the first seal portion 116 is provided with a second contact seal element 126 sealing a second inter-member gap 124 defined in a circumferential wall of the first joint section 16, the circumferential wall defining an accommodation space 108 for accommodating the first driving mechanism 34. COPYRIGHT: (C)2008,JPO&INPIT