| 摘要 |
The invention relates to an apparatus for longitudinally dividing sheet material, said apparatus comprising a cutter bar (1) that is oriented crosswise to the movement direction of the sheet material and is provided with a guide (7) on which knife holders (2) are positioned such that they can be displaced. The knife holders are respectively provided with a immobilizing brake (18), comprising at least one movable brake block (18.1, 18.2), which acts via at least one force means (21) upon a parallel braking surface (20.1, 20.2), arranged so as to extend in longitudinal direction on the cutter bar. The force means is designed to immobilize the knife holder to be positioned ob the cutter bar (1) during the operation, wherein the force exerted by the brake block is oriented in the guide plane defined by the guide. The device is further provided with a positioning device (10) that is guided along the cutter bar (1) for positioning the individual knife holders (2). The positioning device comprises a coupling means (13) that can be activated and can be made to engage in the respective knife holder to be positioned and, upon engagement, releases the brake block (18.1, 18.2) of the immobilizing brake (18) from the braking surface (20.1, 20.2).
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