| 摘要 |
PURPOSE:To simplify the structure of a device, to reduce the device in size and to simplify coupling and tension control operations by providing a device for controlling the tension of a circular belt used in a bucket elevator or the like between the end portions of the belt. CONSTITUTION:A rotating roller body 1 has a concave-convex surface 2 fixed by contact friction of a belt surface on the peripheral surface thereof, and a belt clamping plate 5 is fixed to the peripheral surface of the roller body 1 through a suitable belt fitting gap 4. A pivotal handle 8 including a ratchet mechanism 7 is supported on a rotary shaft 6 of the roller body 1, and one belt end portion 11 is secured to fixing means. The other belt end portion is inserted in the above belt fitting gap 4 to be clamped by the belt clamping plate 5 and the concave-convex surface 2 of the rotating roller body 1. As occasion demands, the pivotal handle 8 is operated to rotate the rotating roller 1, thereby to control the tension of a circular belt 10. |
