| 摘要 |
PROBLEM TO BE SOLVED: To provide a manipulator properly operable for a long period under a high temperature condition. SOLUTION: Pin support holes 16, 17 are provided on an upper part 4a and a lower plate part 4b of a frame 3 of a manipulator. First bushes 21, 22 made of cast iron are inserted into the pin support holes 16, 17 in an interference fit state. A pin insertion hole 18 is provided on an arm 5 inserted between the upper plate part 4a and the lower plate part 4b. A second bush 22 made of cast iron is inserted into the pin insertion hole 18 in an interference fit state. A support pin 6 is inserted into pipe holes 21a, 21a of the first bushes 21, 21, in a clearance fit state and pipe hole 22a of the second bush 22. A stop part 27 is integrally protruded outward in the radius direction from an upper part of the support pin 6. A retaining ring 29 is installed detachably in a peripheral groove 28 on a lower part of the support pin 6 to prevent the support pin 6 from moving in the vertical direction.
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