| 摘要 |
PROBLEM TO BE SOLVED: To provide a roll paper unit capable of preventing roll paper from coming off due to vibration.SOLUTION: A roll paper unit 3 includes a left support frame 9 and a right support frame 10 supporting a roll paper support shaft 14. Each of support frames 9 and 10 includes respectively: shaft insertion ports 22 and 25; bearing parts 21 and 24 rotatably supporting supported parts 14c of the roll paper support shaft 14; guide grooves 23 and 26 guiding the supported parts 14c which are inserted into the shaft insertion part 22 and 25, to the bearing parts 21 and 24. The left guide groove 23 of the left support frame 9 and the right guide groove 26 of the right support frame 10 are different in shapes viewed from a printer width direction. When roll paper 11 moves in one direction among radial directions due to vibration, one of the left and right supported parts 14c of the roll paper support shaft 14 interferes with an inside wall of the left guide groove 23 or an inside wall of the right guide groove 26 to prevent the roll paper 11 from coming off. |
