Rotary cutoff apparatus

摘要

Rotary cutoff apparatus is provided with a knife cylinder (1), which has a knife (2) arranged on its outer circumferential surface and is rotatably supported, and an anvil member (7) with which a free edge of the knife (2) can be brought into contact upon rotation of the knife cylinder (1), whereby a travelling band-shaped sheet (101) is nipped between the knife (2) and the anvil member (7) and is hence cut off. The knife (2) is supported on the knife cylinder (1) via a spring (36) having spring force sufficient to bear cutting force required to cut off the band-shaped sheet (101) so that the knife (2) is displaceable in a loaded direction upon cutting off the band-shaped sheet (101). The rotary cutoff apparatus can be arranged, for example, in a production line for a band-shaped sheet material such as a corrugated fiberboard sheet. The apparatus permits easy speed control without needing high-level skill or technique and also allows ready replacement of its anvil member.