PURPOSE:To absorb the twisting of hoses, generated in a wrist device and an arm, by the rotation of a tool supporting member. CONSTITUTION:In order to absorb the rotational torsion of hoses caused by the rotation of a third shaft 39 for rotating a wrist device, there is provided a third space 48 for accommodating hoses 43, 44, 45 disposed in such a way as to surround the third shaft 39 spirally. A second space 47 is further provided to accommodate the extended part of the third shaft 39 and the first extended part 40, 41, 42 of the hose group, and a first space 50 for accommodating the second extended parts 54, 55, 56 of the hose group is formed inside the wrist device. The inner end parts of the first extended parts 40, 41, 42 of the hose group are fixedly supported by a supporting plate 49 fixed to an arm cover.
展开▼
