PROBLEM TO BE SOLVED: To adjust a cylinder capacity according to the amount of dog dung.SOLUTION: A fastening machine screw 11 of a metal fixture 9 is loosened or fastened to rotate a turntable 4, and the length of a line 7 is changed, to thereby expand/contract a cylinder 2.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】犬の糞の量に応じて筒の容量を調節することを得る。【解決手段】固定金具9の締めつけビス11を弛め或いは締めつけて、回転板4を回転させ、線7の長さを変えて、筒2の伸縮を計る。【選択図】図2