| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to perform maintenance management for a part of a grindstone having a substantially circular form, not the entire thereof.SOLUTION: A processing device is equipped with a transportation mechanism part and a grindstone unit 20. The transportation mechanism part transports a conical roller, of which a large end face is directed to a radial direction outside, while revolving the rotating roller around a vertical line P. The grindstone unit 20 has a grindstone surface 23 on an inner peripheral side, said grindstone surface 23 having a whole shape which is substantially circular form with removal of a part of a circle around the vertical line P and slidably contacting the large end face of the conical roller. The grindstone unit 20 has a pedestal 21 of which a whole shape is a substantially circular form and is fixed to a device body 15, and a grindstone body 22 which is independent from the pedestal 21 and is detachably attached to the pedestal 21. The grindstone body 22 has a whole shape of a substantially circular form and has the grindstone surface 23 on an inner peripheral side thereof. The grindstone body 22 is divided into plural segments 25 which are disposed along a circumferential direction. |
