Paper transportation device

Abstract

A paper transportation device 100 is provided with an obliquely transported condition detection unit 404 and a sensor movement controller 402. The obliquely transported condition detection unit 404 is configured to detect an obliquely transported condition of a sheet of paper based on a detection result of the travel-directional front end of the sheet of paper by obliquely transported condition detection sensors 113 a and 113 b. The obliquely transported condition detection sensors 113 a and 113 b are arranged in predetermined positions on a document transportation path. The sensor movement controller 402 is configured to move the obliquely transported condition detection sensors 113 a and 113 b in accordance with the width size of the sheet of paper.

1 . A paper transportation device, comprising:
 a disposition plate, at least one sheet of paper being disposed thereon;   a paper transportation path being configured to transport the sheet of paper, the paper transportation path having a transporting member transporting the sheet of paper;   a guide member being configured to guide the sheet of paper disposed on the disposition plate to the paper transportation path;   a pair of sensors detecting a transportation directional front end of the sheet of paper, the sensors being arranged on the paper transportation path, at least one of the sensors being allowed to move in a paper width direction perpendicular to the paper transportation direction; and   a sensor movement controller being configured to control an interval between the pair of sensors by moving the pair of sensors based on the width of the sheet of paper.   
   
   
       2 . The paper transportation device according to  claim 1 , further comprising an obliquely transported condition detection unit that detects an obliquely transported condition of the sheet of paper on the paper transportation path based on the detection result by the pair of sensors. 
   
   
       3 . The paper transportation device according to  claim 2 , further comprising
 a pair of side portion transportation members that transports width directional opposed end portions of the sheet of paper, respectively, the side portion transportation members being allowed to be separately operated, the side portion transportation members being arranged in the paper width direction in predetermined intermediate positions on the paper transportation path, and   a correction unit that controls operation of the side portion transportation members based on the detection result by the obliquely transported condition detection unit.   
   
   
       4 . The paper transportation device according to  claim 1 , further comprising
 a pair of alignment plates that align width directional opposed sides of the sheet of paper, the alignment plates being arranged on the disposition plate, at least either of the alignment plates being allowed to move in the paper width direction, the alignment plates including extended portions, respectively, the extended portions extending from the pair of alignment plates in the paper transportation direction, and   wherein the sensors are arranged in the extended portions, respectively.   
   
   
       5 . The paper transportation device according to  claim 3 , further comprising
 a pair of alignment plates that align width directional opposed sides of the sheet of paper, the alignment plates being arranged on the disposition plate, at least one of the alignment plates being allowed to move in the paper width direction, the alignment plates including extended portions, respectively, the extended portions extending in the paper transportation direction, and   wherein each of the sensors and each of the side portion transportation members are arranged in each of the extended portions.   
   
   
       6 . The paper transportation device according to  claim 1 , further comprising
 a pair of auxiliary members, the auxiliary members arranged on the lower surface of the paper transportation path, at least one of the auxiliary members being allowed to move in the paper width direction, and   wherein the sensors are arranged in the auxiliary members, respectively.   
   
   
       7 . The paper transportation device according to  claim 6 , further comprising
 a plurality of sensors that detect a paper size by detecting at least two of the four corners of a plurality of kinds of paper disposed on the disposition plate   wherein the sensor movement controller moves the pair of sensors based on the detection result of the plurality of sensors.   
   
   
       8 . The paper transportation device according to  claim 3 , further comprising
 a pair of auxiliary members, the auxiliary members arranged on the lower surface of the paper transportation path, at least one of the auxiliary members being allowed to move in the paper width direction, and   wherein each of the sensors and each of the side portion transportation members are arranged in each of the auxiliary members.