| 摘要 |
PURPOSE:To install the second arm in any direction in 180 deg. by installing the second connection part and the third connection part which can connect the second link at a symmetrical position having a turning axis line as center onto the second arm and forming a pair of supporting parts which axially support the second arm in turnable manner onto the first arm and each of which has a same shape. CONSTITUTION:The supported part of the second arm 13 is supported onto the supporting part of the first arm 12, when used as floor-placed type, and the first connection part of the first link 12 and the second connection part 16 of the second arm 13 are connected through the second link 20. When used as a ceiling-suspended type, the second arm 13 is supported onto the supporting part of the first arm 12 reversely to the direction in case of the floor-placed type, and the first connection part of the first link 21 and the third connection part 17 of the second arm 13 are connected through the second link 20. |
