| 摘要 |
PURPOSE: A roller including a bearing and a clutch bearing is provided to optionally select the bearing whenever necessary by switching the position, and to enhance the driving force of the roller. CONSTITUTION: A roller comprises: a supporting stand(100) supporting and fixing the shaft by inserted into both ends of the shaft; a bearing(300) installed in one side of a body of the shaft; a clutch bearing(500) installed in the other side of the body of the shaft; a roller(600) connected the outside of the bearing or the clutch bearing to move to the side; and an attachable stopper installed in between the bearing and the clutch bearing not to be separated from the bearing. The stopper in formed in a larger diameter than the bearing while being installed to the shaft.
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