Sheet manufacturing apparatus

Abstract

A sheet manufacturing apparatus includes: a measurement portion that weighs paper pieces, in which the measurement portion includes: a first frame portion; a second frame portion separated from the first frame portion; a lid portion on which paper pieces to be weighed are placed in a closed state, and which transmits the weighed paper pieces to a downstream merging portion in an open state; a sensor portion that measures a mass of the paper pieces placed on the lid portion; and a shutter portion configured to close a space between the lid portion and the merging portion, the sensor portion is attached to the first frame portion, and the shutter portion is attached to the second frame portion.

What is claimed is: 
     
         1 . A sheet manufacturing apparatus comprising:
 a first measurement portion that weighs paper pieces, wherein   the first measurement portion includes:
 a first frame portion; 
 a second frame portion separated from the first frame portion; 
 a first lid portion on which paper pieces to be weighed are placed in a closed state, and which transmits the weighed paper pieces to a downstream transport pipe in an open state; 
 a first sensor portion that measures a mass of the paper pieces placed on the first lid portion; and 
 a first shutter portion configured to close a space between the first lid portion and the transport pipe, 
   the first sensor portion is attached to the first frame portion, and   the first shutter portion is attached to the second frame portion.   
     
     
         2 . The sheet manufacturing apparatus according to  claim 1 , wherein
 a vibration absorption portion is disposed between the first frame portion and the second frame portion.   
     
     
         3 . The sheet manufacturing apparatus according to  claim 1 , wherein
 the first lid portion is closed when the paper pieces are placed thereon and is opened when the paper pieces are transmitted to the transport pipe, and   the first shutter portion is opened in conjunction with an opening operation of the first lid portion.   
     
     
         4 . The sheet manufacturing apparatus according to  claim 3 , wherein
 the first shutter portion is closed in conjunction with a closing operation of the first lid portion by an urging force of a spring member.   
     
     
         5 . The sheet manufacturing apparatus according to  claim 4 , wherein
 the first measurement portion includes an opening/closing mechanism that opens and closes the first lid portion.   
     
     
         6 . The sheet manufacturing apparatus according to  claim 1 , further comprising:
 a second measurement portion that weighs paper pieces separately from the first measurement portion, wherein   the second measurement portion includes:
 a third frame portion; 
 a fourth frame portion separated from the third frame portion; 
 a second lid portion on which paper pieces to be weighed are placed in a closed state, and which transmits the weighed paper pieces to the transport pipe in an open state; 
 a second sensor portion that measures a mass of the paper pieces placed on the second lid portion; and 
 a second shutter portion configured to close a space between the second lid portion and the transport pipe, 
   the second sensor portion is attached to the third frame portion, and   the second shutter portion is attached to the fourth frame portion.   
     
     
         7 . The sheet manufacturing apparatus according to  claim 6 , wherein
 the first measurement portion and the second measurement portion weigh the paper pieces at different timings.   
     
     
         8 . The sheet manufacturing apparatus according to  claim 7 , wherein
 when the first lid portion is in the open state, the second lid portion is in the closed state, and paper pieces to be weighed are placed on the second lid portion, and   when the second lid portion is in the open state, the first lid portion is in the closed state, and the paper pieces to be weighed are placed on the first lid portion.   
     
     
         9 . The sheet manufacturing apparatus according to  claim 6 , wherein
 the first frame portion and the third frame portion are the same.