| 摘要 |
PROBLEM TO BE SOLVED: To eliminate obstacles such as an elongation of an ink sheet and the like even when printing with irregular printing densities is repeatedly carried out with a large-width printing head by constituting each wind core to be supported rotatably to a supporting shaft while a friction part is pressed to a friction part of an adjacent wind core or a friction part of the supporting shaft. SOLUTION: An urging spring 25 urges each of wind cores 16-19 to a friction part 20A of a supporting shaft 20 via a pressing member 22 when a tightening screw 24 is fastened. At this time, each wind core 16-19 is supported rotatably to the supporting shaft 20 while a friction part 16A-19A is pressed via spacer members 21, a pressing member 22 and a friction pad 23 to friction parts of the adjacent wind cores or the friction part 20A of the supporting shaft. Each wind core 16-19 integrally rotates with the supporting shaft 20 in the constitution when a take-up part 10 rotates. However, if a predetermined or more tension is applied to an ink sheet, each friction part, sliding resistance members 21C of the spacer members 21, a sliding resistance member 22C of the pressing member 22 and the friction pad 23 slide and therefore, each wind core rotates idly.
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