| 摘要 |
A belt supporting device includes a first support member for supporting a belt pulley, the member having a smaller width than that of the outer peripheral surface of the pulley, an endless belt wound on the pulley, a second support member for forming between the endless belt wound on the pulley and the second support member a space for extracting the endless belt in the axial direction of the pulley, and a positioning member located movably in and out of the space to maintain the space by entering the space and to thereby position the first and second support members.
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