| 摘要 |
PROBLEM TO BE SOLVED: To reduce manufacturing cost, to compact an arranging space and to continuously carry out carrier motion. SOLUTION: A plural number of unidirectional clutches 15, 16 are provided on a rotational driving shaft 14 of sprockets 11, 12 for carriage to move a chain 13 for carriage, and a plural number of sprockets 17, 18 on which these unidirectional clutches 15, 16 are provided are driven by differring timing from each other by a plural number of air cylinders 23, 24 through chains 21, 22 for driving, etc. Consequently, it is possible to certainly, favourably and continuously drive the chain 13 for carriage, and it is safe even when it is arranged at a dangerous site where combustible gas is handled. Additionally, manufacturing cost is also comparatively low, and so much of a setting space is not required.
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