DEVICE FOR DETECTING THICKNESS OF PAPER SHEET

摘要

A mass thickness detector is provided that the structure is minimized by reducing the mounting space of the driving roller. A mass thickness detector(1) comprises a standard roller(2), a driving roller(4) which is arranged side by side toward the axial direction of the standard roller and can be displaced, detection means which detects the displacement of the driving roller when the paper currency is inserted in both rollers. The concave part and convex part are formed side by side toward the peripheral surface direction of the driving roller.