To provide a cylindrical shaft with good accuracy on shape and dimensions, to provide a carrying roller which allows cost and weight to be reduced and furthermore suppresses conveyance irregularity, and to provide a carrying unit and a printer device using this carrying roller.
The cylindrical shaft 16 is formed in a cylindrical shape by making a pair of ends face each other by press working, having a seam between the ends. The seam 80 includes a center straight line part 86, which is provided at the center part in the axial direction of the cylindrical shaft 16 and formed in a straight line approximately parallel to the axial direction of the cylindrical shaft 16, and bent parts 85, which have a plurality of crossing parts 85b, which are provided at both sides of the center part and extend in a direction crossing the axial direction of the cylindrical shaft 16, and a connecting straight line part 85a, which connects the ends of a pair of the crossing part 85b. The connecting straight line part 85a has a first straight line part 87b, which connects the ends at one side of the crossing part 85b, and a second straight line part 87c, which connects the ends at the other side of the crossing part and is shorter than the first straight line part 87b. A distance d6 between the ends of the center part is structured to be shorter than a distance d7 between a pair of ends of the second straight line part 87c.
ONO KATSUNORI
OZAWA KENJI
| JP2007203343A | 2007-08-16 | |||
| JP2007203342A | 2007-08-16 | |||
| JPH11156461A | 1999-06-15 | |||
| JPH07119811A | 1995-05-12 | |||
| JP2008068977A | 2008-03-27 | |||
| JP2007203342A | 2007-08-16 | |||
| JPH11156461A | 1999-06-15 | |||
| JPH07119811A | 1995-05-12 | |||
| JP2008068977A | 2008-03-27 | |||
| JP2007203343A | 2007-08-16 |
Masatake Shiga
Kazunori Onami
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