Patent ID: 7134657

Claim:
A sheet material guiding mechanism for guiding the edge portion of sheet material, comprising: a guide member slidable within a slidable region, while being fixable at a position corresponding to the size of the sheet material; a regulating portion provided for said guide member for regulating the position of the sheet material by abutting against the edge portion of the sheet material; and a fixation releasing portion provided for said guide member capable of releasing the fixed condition of said guide member by depression, wherein said fixation releasing portion is opposed to the edge portion of the sheet material when said regulating portion is in contact with the edge portion of the sheet material and provided at a position where said fixation releasing portion is not in contact with the edge portion of the sheet material, a knurling section is formed for a sliding surface of said guide member, and a knurling counterpart is formed for said guide member to engage with the knurling section, and the knurling counterpart is supported by support means and said support means is elastically deformed if said fixation releasing portion is pressed in a direction apart from the sheet material so that the knurling counterpart is spaced apart from the knurling section and moved in a direction to separate said guide member from the sheet material.