| 摘要 |
PROBLEM TO BE SOLVED: To provide an image formation apparatus capable of preventing a transfer unit from being displaced in a direction opposite from a direction of insertion into an apparatus body with pressing force to a rotary shaft of a tension roller that the transfer unit comprises when the rotary shaft moves out of a positioning groove.SOLUTION: An image formation apparatus 10 comprises: a guide groove part 42 for a rotary shaft 49 extended in an insertion direction from an end of a rail member 38 on the side of an opening 41; a positioning groove 101 recessed in a guide surface for the rotary shaft at the guide groove part; a press member 103 provided rotatably on a support shaft, as a fulcrum, provided more on the opening side than the positioning groove and extending in an axial direction, and pressing the rotary shaft in a groove depth direction of the positioning groove; and a lower surface part 114, as a contact part of the press member for the rotary shaft, applying press force to the rotary shaft in the groove depth direction in a sinking state in which the rotary shaft is located at the sinking position and also applying second press force to the rotary shaft in the insertion direction in an escape state in which the rotary shaft is located at an escape position against the first press force.SELECTED DRAWING: Figure 7 |
