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Sheet size detecting device

a detecting device and sheet technology, applied in the direction of transportation and packaging, thin material processing, article separation, etc., can solve the problems of inability to detect sheet sizes in time, large size of detecting devices, etc., and achieve the effect of low cos

Inactive Publication Date: 2005-03-10
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] Accordingly, an object of the present invention is to provide a sheet size detecting device which can detect sheet sizes by means of a compact structure, and which can be provided at low cost.

Problems solved by technology

Due to the necessity of using a large number of sensors, the sheet size detecting device is inevitably large in size and costly.

Method used

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  • Sheet size detecting device
  • Sheet size detecting device
  • Sheet size detecting device

Examples

Experimental program
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first embodiment

[0022] (First Embodiment)

[0023]FIG. 1 shows the outward appearance of the manual insertion tray11 as well as part of the internal structure of the tray 11. The tray 11 has two guides 12 and 13 each having a substantially “L”-shaped cross section. The guides 12 and 13 are movable in the longitudinal direction of the tray 11 in accordance with the size of sheets to be used. Each of the L-shaped guides is made up of two plates, one plate being parallel to the manual insertion tray 11, and the other plate being perpendicular thereto. Sheets are stored between the plates that are perpendicular to the manual insertion tray 11.

[0024] Guide 12 is integrally assembled with a rack gear 14. The rack gear 14 is in mesh with a pinion gear 16 which is rotatable around an axis perpendicular to the moving direction of the guide 12. Likewise, guide 13 is integrally assembled with a rack gear 15. This rack gear 15 is also in mesh with the pinion gear 16 and extends in parallel to the rack gear 14 de...

second embodiment

[0044] (Second Embodiment)

[0045] The second embodiment of the present invention will now be described. Structural elements that are similar or correspond to those of the first embodiment are denoted by the same reference numerals, and a detailed description of such structural elements will be omitted.

[0046]FIG. 7 is a schematic diagram showing how a sheet size is detected according to the second embodiment of the present invention.

[0047] In the manual insertion tray 11 of the first embodiment, the rack gear 15 is provided with the bit generating sections 19 and 20. The manual insertion tray of the second embodiment does not employ this structure. In place of this structure, a pinion gear 16 rotatable on an axis of rotation is provided with circular bit generating sections 41 and 43. Bit generating section 41 includes a projected portion extending in the rotating direction of the pinion gear 16, and a depressed portion 42 formed at the predetermined position of the projected portio...

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PUM

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Abstract

A sheet size detecting device is provided with the following a tray in which sheets are stored, guides that can be adjusted in position in accordance with the size of sheets stored in the tray, and bit generation sections that are moved in synchronism with movement of the guides. The device detects bits based on the movement of the bit generation sections, and the number of bits detectable is larger than the number of bit generation sections by at least one. The device detects the size of sheets stored in the tray on the basis of the correspondence between the combination of detected bits and the sizes of sheets which can be stored in the tray.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application is a continuation of U.S. application Ser. No. 10 / 383,677, filed Mar. 10, 2003, the entire contents of which are incorporated herein by reference. [0002] This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2002-097552, filed Mar. 29, 2002, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] The present invention relates to a sheet size detecting device for detecting the size of sheets stored in a position. [0005] 2. Description of the Related Art [0006] Copying machines, printers or facsimile machines have a function of detecting the size of sheets stored in a predetermined position. The sheet size detection is realized by optical sensors that are selected or used in accordance with the size of sheets. The sensors are made to detect a sheet, for example when a platen cover...

Claims

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Application Information

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IPC IPC(8): B65H1/04B65H1/00
CPCB65H1/04B65H1/266B65H2403/411B65H2511/10B65H2557/23B65H2553/25B65H2220/03
Inventor FURUKAWA, KIMIAKI
Owner KK TOSHIBA