To simplify the fitting/removing work to a side plate and improve work efficiency at the time of maintenance in particular by providing a holding member holding a bearing in a notch section and an exciting means provided at least on one of the bottom section of the notch section and the holding member and exciting a pair of bearings in the approaching directions.
When a clip holder 220 is to be removed, a coupling release knob 236 is held and pressed toward a column member 224, then a coupling pawl 232 continued to the coupling release knob 236 is released from a coupling hole 234, and the clip holder 220 can be moved. When the coupling release knob 236 is held and lifted, the clip holder 220 can be removed. When the clip holder 220 is removed, the nip pressure applied to a bearing 204 is also released, and the bearing 204 can be removed. When the clip holder 220 is fitted, the bearing 204 is held and the nip pressure can be applied concurrently, and the work efficiency for removing or re-fitting a roller R can be improved.
MIYAMOTO SHINICHI
YAMAMOTO CHISATO
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