| 摘要 |
When a carriage 16 is positioned in an end portion in the direction indicated by arrow B in a scanning area thereof, an attachment 46 is in contact with a main frame side wall 1a of a plotter 1, and turns in the direction indicated by arrow D against the enabling force in the direction indicated by arrow C of a helical torsion coil spring 50, so that an image position detector 40 is stored in a storage unit 16c of the carriage 16.
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