To provide a method and a wind-up part by which, after a coating tape covering a carrier tape for supplying parts is wound up by a wind-up part, it can be easily collected, and to provide a part supply device.

The part supply device is comprised of a reel unit 29 which is intermittently driven by the part supply device, a reel cap 31 which is fitted to the reel unit 29 in freely attachable and detachable manner, and a wind-up ring 51 which is held between the reel unit 29 and the reel cap 31. In the wind-up part 9 of the part supply device, a separation part is provided on the wind-up ring 51 to mutually shift the separation part in the axial direction of the wind-up ring 51 after the coating tape is wound up, so as to release a tightening force by the coating tape and to collect the coating tape. The separation part is shifted in the radius direction of the ring to avoid overlapping, so that both separation surfaces of the separation part can be made projected and recessed, respectively.

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