| 摘要 |
PROBLEM TO BE SOLVED: To make it unnecessary to distinguish between two parts of wire demarcated with a nonskid material when the nonskid material is fitted into a recessed part of a wire drum by fitting the nonskid material at the center position of the length of the wire. SOLUTION: The wire drum 61, second and third pulleys 62, 63 are freely rotatably fitted to a frame 60 of a copier. The wire drum 61 is rotated and driven by a stepping motor 100. The spherical nonskid material 70a is fitted at the center position of the length of the wire 70. On the other hand, the recessed part where the nonskid material 70a is fitted is formed on the outer peripheral surface of the wire drum 61. Thus, the fixed position of the wire 70 to frames 60 on both ends, the fitted position of the wire drum 61 to the frame 60 and the number of windings of the wire 70 around the wire drum 61 are designed so that wire driving mechanism is exactly assembled when the nonskid material 70a is fitted at the center of the length of the wire 70.
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