| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem wherein positioning accuracy is lower in a line direction than in the column direction that employs abutting because the positioning accuracy of a replacing print unit is determined in the line direction by engagement of a pin with a round hole in a conventional technology. SOLUTION: A replacing jig comprises: a positioning through square hole whose side has a length equal in dimension to a diameter of a positioning hole of the print unit; a plate wherein at least three sets of positioning through slots, whose line-direction dimension equal to the hole diameter of the positioning hole is set to be a dimension on a short side, are arranged in a hammer mechanism part with a prescribed pitch and provided by being alternately disposed with the same pitch as that of the positioning hole of the print unit; and a plurality of positioning pins which are equal in diameter to the positioning holes of the print unit, the through square holes provided in the plate, and the positioning holes of the print unit, passed through the through slots. COPYRIGHT: (C)2004,JPO&NCIPI
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