| 摘要 |
PURPOSE:To make centering performable so smoothly with a small chuting value, by installing a centering roller in both directions, in the frame installed as being opposed to both right and left sides of a running passage free of rotation in both directions. CONSTITUTION:A centering roller 11 in both directions and another centering roller 12 in a longitudinal direction (forward direction) both are installed in an upper part of a frame 3, and the centering roller 11 for both directions is installed at the outside while the centering roller 12 for the longitudinal direction at the inside, respectively. And, since centering in both directions of a load 8 is carried out with the roller 11, frictional resistance is as small as negligible whereby the load is smoothly chutable and, what is more, a chuting value gets off with a small one. Likewise, centering in the forward direction is carried out by the roller 12 so that it is smoothly performable. Since a vertical travel in the load 8 is small enough, such possibilities that the load 8 and the frame 3 are made to interfere with each other and the load 8 drops from the frame 3 may not happen there. |
