| 摘要 |
PROBLEM TO BE SOLVED: To stabilize hammering characteristics of printing hammers by reducing a shift between a hammer pin pitch and a comb yoke pitch for specific printing hammers which generate the shift of approximately one dot interval, when only a hammer spring is specially designed in terms of printing densities of 180 dpi and 160 dpi while the other parts are shared in a hammer mechanism part constituted with a plurality of printing hammers arranged. SOLUTION: For the specific printing hammers which generate the shift of approximately one dot interval between the hammer pin pitch and the comb yoke pitch of the hammer mechanism part, the hammers are disposed by shifting the hammer pin pitch by one dot. The shift between the hammer pin pitch and the comb yoke pitch is thus reduced, so that the hammering characteristics of the printing hammers can be stabilized.
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