| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin pulley to be mounted on a shaft fitted with a pin of such a structure that a first and a second groove to admit fitting of the pin are formed at the inside surface of a hole for fitting of the shaft formed in the pulley, the first groove being furnished with a stop for fitting and the second groove with a projection on the side nearer the operator, and that the pin is accommodated between the projection and stop by a snap fit, whereby it is practicable to consolidate the pulley with the shaft by a stable fixing force without drop of the working easiness for assembling. SOLUTION: A slope 21c inclining so that the groove depth lessens at least near the stop 21a is formed on the bottom surface B1 of the first groove 21, and the distance from the bottom surface B2 of the second groove 22 in a position just before the stop 21a is made approximately equal to the length of the pin 1a so as to facilitate insertion of the pin 1a, while it is arranged so that no gap is generated in the longitudinal direction after the assembly.
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