| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk centering device capable of greatly improving the accuracy of centering as desired while a cost is suppressed to a minimum. SOLUTION: This disk centering device 1 for centering a disk having the diameter of a center hole including a toleranceΔset in the range of D to D+Δis provided with a practically cylindrical center part 50 having diameter of D-δ(0<δ<Δ), and N (N>=2) pieces of centering mechanisms CPM and CM2 differing in diameters from one another concentrically around the cylindrical central part 50. Each centering mechanism is provided with at least one group of three elastic entering pieces CP1-1, CP1-2 and CP1-3, and CP2-1, CP2-2 and CP2-3, positioned apart from one another on respective circumferences P1 and P2 in a circumferential direction. The group of centering pieces adjoining in a diameter direction are disposed in different positions when seen from a circumferential direction. Among the N pieces of centering mechanisms, the centering mechanism CP2 other than the centering mechanism CP1 of the largest diameter is provided with an elastic centering piece along a circumference P2 smaller in diameter than D+Δ.
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