| 摘要 |
<p>PURPOSE:To permit the actions of bending, distortion, expansion, shrinkage, etc., to be performed freely by a method in which the tops of an adjacent upright fixing frame and an inverted fixing frame are connected with an expandible and variable beam and the variable beam is allowed to optionally expand or shrink by a driver. CONSTITUTION:The top 2a of a triangular upright fixing frame 2 and the tops 2'b and 2'c of a triangular inverted fixing frame 2' and the top 2'a of the fixing frame 2' and the tops 2b and 2c of the fixing frame 2 are connected with variable beams 3, respectively. The top 2a of the frame 2 and the top 2'a of the frame 2' are connected with a variable beam 3' to form a multi-joint arm 1. The driving part 7 of the fixing housing 6 of the variable beams 3 and 3' is operated to turn a rotary bar 5 in relation to a fixed bar 4, and the beams 3 and 3' are expanded or contracted with a jack 8.</p> |
