The core supply detection device of the pencil tool in the pencil plotter

摘要

(57) Abstract Objective The pencil which uses the knock type pencil toolIn the plotter the case where the delivery it does the new core overs and shorts of the feed per revolutionIt prevents. Constitution In flank frame 25 of drafting board 4 electrode 7 of paira, it provides 7b and joints to the continuity detection terminal of control unit 24ru. The occasion where the delivery it does the core inside knock tube 12 of pencil tool 8Pen head 5 to fall, the core support plunger of conductivityPressure welding doing 10 in electrode 7a and 7b, continuity electrode 7a and 7bIt can point. Next, pen head 5 to rise, the fixing knock pre-Pressure welding doing knock tube 12 in to, 23 the delivery it does the core. DropTo repeat rise, the core inside core support plunger 10 the rubber phosphorusWhen it is pressed in to gu 22, as for core support plunger 10 the pencilWhile it is pushed in to inside axial 9 pencil tool 8 rises.As for control section 24, when pen head 5 specified quantity h rising,With the continuity of electrode 7a and 7b end opportunity of giving core operation formatStopping/deciding it does.