SHEET STACKING UNIT, AND SHEET CONVEYING DEVICE AND IMAGE FORMING APPARATUS EACH INCLUDING THE SHEET STACKING UNIT
First Claim
1. A sheet stacking unit comprising:
- a placement body;
a sheet stacking plate on which sheets are to be stacked together with the placement body;
a cursor which is movable on an upper surface of the placement body in a widthwise direction perpendicular to a sheet conveyance direction and which is brought into contact with widthwise side faces of the sheets placed on the sheet stacking plate to align the sheets;
a rack coupled to the cursor and extending along the widthwise direction;
a pinion provided in the placement body to make up a rack and pinion mechanism in cooperation with the rack;
a detection sensor which is placed opposite the rack and which has a light-emitting portion and a light-receiving portion;
a plurality of detection-object parts which are, placed in the rack along the widthwise direction and which are to be detected by the detection sensor while the cursor is set in specified positions; and
a controller which detects a position of the cursor in correspondence to an output of the detection sensor to thereby identify a widthwise size of the sheet, whereinthe plurality of detection-object parts have optical characteristics of reflectivities or transmissivities, which are different from one another, with respect to light emitted from the light-emitting portion, andthe controller identifies the widthwise size of the sheet on a basis of output values from the detection sensor which detects light reflected or transmitted by the detection-object parts.
1 Assignment
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Accused Products
Abstract
A sheet stacking unit of the disclosure includes a sheet stacking plate, a cursor, and a detection sensor. The cursor includes an alignment part for performing widthwise alignment of a document, and a rack extending along the widthwise direction. The detection sensor is placed opposite the rack, and has a light-emitting portion and a light-receiving portion. A plurality of detection-object parts placed in the rack along the widthwise direction have optical characteristics of different reflectivities or transmissivities from one another with respect to light emitted from the light-emitting portion. The controller detects a widthwise size of the document on a basis of output values from the detection sensor which detects light reflected or transmitted by the detection-object parts.
10 Citations
12 Claims
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1. A sheet stacking unit comprising:
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a placement body; a sheet stacking plate on which sheets are to be stacked together with the placement body; a cursor which is movable on an upper surface of the placement body in a widthwise direction perpendicular to a sheet conveyance direction and which is brought into contact with widthwise side faces of the sheets placed on the sheet stacking plate to align the sheets; a rack coupled to the cursor and extending along the widthwise direction; a pinion provided in the placement body to make up a rack and pinion mechanism in cooperation with the rack; a detection sensor which is placed opposite the rack and which has a light-emitting portion and a light-receiving portion; a plurality of detection-object parts which are, placed in the rack along the widthwise direction and which are to be detected by the detection sensor while the cursor is set in specified positions; and a controller which detects a position of the cursor in correspondence to an output of the detection sensor to thereby identify a widthwise size of the sheet, wherein the plurality of detection-object parts have optical characteristics of reflectivities or transmissivities, which are different from one another, with respect to light emitted from the light-emitting portion, and the controller identifies the widthwise size of the sheet on a basis of output values from the detection sensor which detects light reflected or transmitted by the detection-object parts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification