| 摘要 |
PROBLEM TO BE SOLVED: To facilitate disassembling and reassembling of an arm mechanism.SOLUTION: A parallel link part 10 of an arm mechanism 4 includes an upper hem link 11, an lower hem link 12, and a pair of lower arms 13 and 14 which constitute a parallelogram, and the lower arms 13 and 14 are rotatably connected to the upper hem link 11 at proximal ends 15 and 17 and rotatably connected to the lower hem link 12 at distal ends 16 and 18. One end 19 of the upper hem link 11 is rotatably connected to the distal end 8 of the upper arm 6 so that the rotary shaft A2 of the upper hem link 11 is orthogonal to the rotary shafts A3 and A4 of the proximal ends 15 and 17 of the lower arms 13 and 14. One end 20 of the lower hem link 12 is rotatably connected to a bracket 3 so that the rotary shaft 5A of the lower hem link 12 is orthogonal to the rotary shafts A6 and A7 of the distal ends 16 and 18 of the pair of lower arms 13 and 14. One end 19 of the upper hem link 11 and one end 29 of the lower hem link 12 are detachably attached to the upper arm 6 and the bracket 3 respectively. |
