Sheet manufacturing apparatus

Abstract

A sheet manufacturing apparatus includes a sheet forming unit that forms a strip-shaped sheet by accumulating a material containing fibers and then compressing the material and a transport unit including a plurality of transport rollers arranged in a transport direction of the sheet to transport the strip-shaped sheet, a cut sheet, and a sheet. The transport unit includes an upstream transport unit including a first transport roller group including some of the plurality of transport rollers, a downstream transport unit including a second transport roller group including, among the plurality of transport rollers, a plurality of transport rollers installed downstream of the first transport roller group in the transport direction, and a sheet sensor that detects an abnormality in transport of the sheet in the transport unit. The upstream transport unit includes an opening mechanism that performs an opening operation when the sheet sensor detects the abnormality.

What is claimed is: 
     
         1 . A sheet manufacturing apparatus comprising:
 a sheet forming unit that forms a sheet by accumulating a material containing fibers and then compressing the material; and   a transport unit including a plurality of transport rollers arranged in a transport direction of the sheet to transport the sheet, wherein   the transport unit includes   an upstream transport unit including a first transport roller group including some of the plurality of transport rollers,   a downstream transport unit including a second transport roller group including, among the plurality of transport rollers, a plurality of transport rollers installed downstream of the first transport roller group in the transport direction, and   an abnormality detection sensor that detects an abnormality in transport of the sheet in the transport unit, and   the upstream transport unit includes an opening mechanism that performs an opening operation when the abnormality detection sensor detects the abnormality.   
     
     
         2 . The sheet manufacturing apparatus according to  claim 1 , further comprising a sheet retraction portion, wherein
 the upstream transport unit is brought into an open state by the opening operation, and   in the open state, the sheet formed by the sheet forming unit deviates from a transport path in the transport direction and moves to the sheet retraction portion.   
     
     
         3 . The sheet manufacturing apparatus according to  claim 2 , wherein
 the opening mechanism includes a movable unit that rotates around a rotating shaft as the opening operation, and   the upstream transport unit is brought into the open state by rotation of the movable unit.   
     
     
         4 . The sheet manufacturing apparatus according to  claim 3 , wherein
 the first transport roller group includes a first transport roller,   the first transport roller includes a pair of an upper roller and a lower roller, and   the upper roller is installed in the movable unit.   
     
     
         5 . The sheet manufacturing apparatus according to  claim 1 , wherein the downstream transport unit includes a cutter that cuts the sheet. 
     
     
         6 . The sheet manufacturing apparatus according to  claim 1 , wherein
 when the abnormality detection sensor detects the abnormality,   a supply of the material is stopped upstream of the sheet forming unit, and formation of the sheet using the material remaining in the sheet forming unit is continued, and   an operation of the second transport roller group is stopped in the transport unit.   
     
     
         7 . The sheet manufacturing apparatus according to  claim 6 , wherein the formation of the sheet in the sheet forming unit is stopped after a predetermined time elapses since the operation of the second transport roller group is stopped.