| 摘要 |
A roller main body including a roller core and a roller holder that supports the roller main body. The roller main body includes a boss protruding from each of both side surfaces of an end portion of the roller core, and a rib formed on each of the both side surfaces of the roller core, the roller holder includes a groove portion that detachably and rotatably supports the boss, and a recess that fixes the roller main body by locking the rib of the roller main body that rotates about the boss, the groove portion includes a rotation sliding contact portion that rotatably slides the boss, and a guiding path portion that guides the boss to the rotation sliding contact portion, and the guiding path portion is formed to have a width smaller than a maximum diameter of the boss.
|
