CLIP MOVEMENT SPEED MEASUREMENT DEVICE AND CLIP MOVEMENT SPEED MEASUREMENT METHOD OF DRAWING DEVICE

摘要

A fiber-optic sensor (70) (measurement means) provided in a drawing device (10) measures a passing time of each of a plurality of protrusions (60a, 60b) that are formed at the tips of a clip (20) at intervals along a movement direction of the clip (20) and protrude in a direction crossing the movement direction of the clip (20). Then, a control unit (80) (calculation means) calculates a movement speed (v) of the clip (20) on the basis of each time (t1, t2) measured by the fiber-optic sensor (70) at which each of the plurality of protrusions (60a, 60b) has passed.