| 摘要 |
PURPOSE:To extend the life of the bellows by coupling one or multiple supports fitted to the upper flange on the bellows and the middle of the bellows with an upper plate or the upper and lower plates and further other support. CONSTITUTION:The bellows 1 is divided into an upper portion and a lower portion equally in length by a support 2. An upper flange 8 is screwed to a screw shaft 7, and a wire 9 is wound around a pulley 10 then fixed to an upper plate 6. The wire 9 is adjusted so that the upper and lower bellows 3, 4 are made equal in length. When the screw shaft 7 is rotated, the upper flange 8 is moved up and down. At this time, the support 2 is coupled with a wire 9 and moved by half the movement of the upper flange 8, thereby the ratio between deflections of the upper bellows and the lower bellows 4 is invariably constant and their extensions become almost equal. Accordingly, both bellows divided by the support are almost equal in length when they are initially set and also after the movement, thus their extensions are almost equal invarially and the life can be extended. |
