| 摘要 |
PROBLEM TO BE SOLVED: To prevent a coupler rubber from being inversely mounted in a front and back direction and to enable visual confirmation of the mounting direction after mounting. SOLUTION: The connecting structure of a drive shaft consists of a drive side coupler 23a arranged on an output shaft 21 side of an engine, a driven side coupler 23b arranged on a drive shaft 22 side and a coupler rubber 40 arranged between the both couplers 23a and 23b. At least a part 41a of the coupler rubber 40 is exposed between the both couplers 23a and 23b and a mark 41b for indicating the mounting direction of the coupler rubber 40 is arranged on the exposed part 41a.
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