| 摘要 |
<p>The known press roll elevator in a double facer in the prior art of the type that there are provided press roll groups, in each of which press rolls for a corrugated cardboard sheet rotatably supported between tip end portions of respective pairs of arms adapted to swing in the traveling direction of the sheet about fulcrum shafts on the both side frames of the double facer, are disposed at intervals along the traveling direction of the sheet, and the press rolls are elevated and lowered by swing motion of the aforementioned arms, is improved in order to facilitate adjustment and other maintenance works for the press roll elevator. The improvements reside in that common rails adapted to be reciprocated along the traveling direction of the sheet and associated with protrusions which butt against the respective arms to swing them, are provided, and differences between the fulcrum intervals between the respective fulcrum shafts and the protrusion intervals between the corresponding intervals are successively varied in the traveling direction of the sheet.</p> |
