| 摘要 |
<p>The present invention provides a movement device, which is capable of automatically eliminating a clearance between a contact body and a support rail without increasing preload and even with abrasion of the contact body and the support rail, so that the device has no play. A preload device 8 comprises: a rotatable rotation body 10 being connected to a contact body 7 at a position displaced from a rotation axis b of the rotation body, wherein the contact body 7 is moved to and away from the support rail 2 when the rotation body is rotated; a first urging member 18 urging the rotation body 10 to rotate in a direction in which the contact body 7 is in contact with the support rail 2; a base member 12 covering at least a part of an outer circumferential face or an inner circumferential face of the rotation body 10 and having a facing surface formed such that the distance between the facing surface and the rotation body 10 is gradually increased in the direction of the rotation of the rotation body 10 caused by the urging force of the first urging member 18; and a peripheral member 20 being provided between the rotation body 10 and the facing surface of the base member 12 so as to be in contact with the facing surface and the rotation body 10.</p> |
