| 摘要 |
A FIRST GUIDE ROLLER (52A) ABUTTING THE TOP SURFACE OF A CARRIER SIDE BELT, AND A FOURTH GUIDE ROLLER (52D) ABUTTING THE BOTTOM SURFACE OF A RETURN SIDE BELT ARE ARRANGED AS A PAIR TO BE FIXED TO A BRACKET (45) THROUGH A SUPPORTING PIECE HAVING A FLAT SPRING (47, 47) OR A CUSHION RUBBER, WHILE A SECOND GUIDE ROLLER (52B) ABUTTING THE BOTTOM SURFACE OF A CARRIER SIDE BELT, AND A THIRD GUIDE ROLLER (52C) ABUTTING THE TOP SURFACE OF A RETURN SIDE BELT ARE ARRANGED AS A PAIR TO BE FIXED TO A BRACKET THROUGH A SUPPORTING PIECE HAVING A FLAT SPRING OR A CUSHION RUBBER SO AS TO BE PROVIDED BETWEEN THE BELT CARRIER SIDE AND THE RETURN SIDE IN A ROTATABLE MANNER. WHEN A BELT IS REPLACED, THE SECOND AND THIRD GUIDE ROLLERS ARE ROTATED BY 90° SO THAT THEY ARE SEPARATED FROM THE THICKEST PART OF THE BELT END, WHICH ALLOWS THE BELT TO BE REPLACED.
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