| 摘要 |
PURPOSE:To relief the attaching operation without reducing the holding force of a type wheel by a method in which an expansible section is provided between plural fitted portions elastically with a rotary shaft in such a way as to enable the fitting to be stepwise released when removed from the rotary shaft. CONSTITUTION:When a rubber cap 10 fixed to the wheel body 9 with an adhesive 11 is pulled to the farther direction from a rotary shaft 2, the non-bonded portion 10a and beveled portion 10b of the cap 10 are extended. The large- diameter portion 2aa of the shaft 2a is relatively biased to downside of a fitting hole 12 and comes out of the fitting hole 12, and on further pulling, the type wheel is completely removed from the rotary shaft 2. |
