JPH01231755A - Device for detecting number of sheet of discharged paper - Google Patents

Device for detecting number of sheet of discharged paper

Info

Publication number
JPH01231755A
JPH01231755A JP5414488A JP5414488A JPH01231755A JP H01231755 A JPH01231755 A JP H01231755A JP 5414488 A JP5414488 A JP 5414488A JP 5414488 A JP5414488 A JP 5414488A JP H01231755 A JPH01231755 A JP H01231755A
Authority
JP
Japan
Prior art keywords
paper
ribs
highest
sheets
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5414488A
Other languages
Japanese (ja)
Inventor
Atsushi Nagashima
長島　厚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP5414488A priority Critical patent/JPH01231755A/en
Publication of JPH01231755A publication Critical patent/JPH01231755A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
    • B65H2405/14—Details of surface
    • B65H2405/141—Reliefs, projections
    • B65H2405/1412—Ribs extending in parallel to feeding/delivery direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/30—Numbers, e.g. of windings or rotations

Landscapes

  • Pile Receivers (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

PURPOSE:To accurately detect the number of sheets by providing a sensor on the upper portion of a paper discharging portion on the extension of the highest rib among a plurality of ribs with different heights provided on a discharge tray and correcting the curl or wave of a sheet of paper without need for using a roller. CONSTITUTION:Three ribs 7 are provided on top of a discharge tray 4 along a discharging direction with the center rib 7 being the highest while both side ribs 7 lower than this. An actuator 2 for detecting the number of discharged sheets of paper is provided on the upper portion of the paper discharging portion 1 of a machine 3 on the extension of the center rib 7. Thereby, a sheet of paper 5 discharged out of the discharging portion 1 onto the tray 4 is curved by the ribs 7 and the highest portion thereof is detected by the actuator 2. Thus, the sheet of paper is carved in such a way that the center portion is the highest while both sides being lower by means of the three ribs 7 on the tray 4 and its own weight and the actuator detects the highest place thereof. The detection of the sheets of paper can be accurately carried out even when there are many curls or waves being formed.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明はプリンタ、複写機等の排出紙枚数検知装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for detecting the number of sheets ejected from printers, copying machines, etc.

（従来の技術） 従来、熱定着装置を備え、画像定着済みの用紙を機械の
上部に排出するようなプリンタや複写機においては、た
とえば、第３図に示すように用紙排出部１の上方に排出
紙の枚数を検知するためのアクチエータ２を配置して前
記機械３から排出トレイ４に排出する用紙の枚数を検知
するようにしていた。(Prior Art) Conventionally, in a printer or a copying machine that is equipped with a heat fixing device and that discharges paper on which an image has been fixed to the top of the machine, for example, as shown in FIG. An actuator 2 for detecting the number of sheets to be discharged is arranged to detect the number of sheets to be discharged from the machine 3 to the discharge tray 4.

しかし、このようなプリンタや複写機等は一般に図示省
略の定着装置から前記排出トレイ４に至るまでの用紙の
搬送路が非常に短く設計されていたため、画像定着の済
んだ用紙を前記排出トレイ３に未だ熱の冷めないうちに
排出せざるおえなかった。However, in such printers, copying machines, etc., the paper transport path from the fixing device (not shown) to the ejection tray 4 is generally designed to be very short. I had no choice but to evacuate it before the fever had cooled down.

そのために、前記用紙が外気に触れて急速に冷却されて
カールしたり、あるいはウェーブすることが多かった。For this reason, the paper is often exposed to the outside air and rapidly cooled, causing it to curl or wave.

この用紙のカールやウェーブは湿　。The curls and waves on this paper are damp.

気の多い環境下においては特に甚だしく、このような場
合、前記アクチエータ２によるセンシング・ポイントが
第４図に示す理想ポイントに対し、第５図および第６図
に示すようにバラツキが生じて用紙５の枚数を誤検知し
てしまうという欠点があった。This is especially severe in a crowded environment, and in such a case, the sensing point by the actuator 2 varies from the ideal point shown in FIG. 4 as shown in FIGS. 5 and 6, and the paper 5 This method has the disadvantage of incorrectly detecting the number of sheets.

（発明が解決しようとする問題点） この欠点を避けるため、従来は第３図に示すように用紙
排出部１のアクチエータ２の近傍にゴム製の羽根車状の
ローラ６等を配置し、この羽根車状のローラ６で前記排
出トレイｌ上に排出される用紙５のカールやウェーブ等
を矯正するようにしていた。(Problem to be Solved by the Invention) In order to avoid this drawback, conventionally, as shown in FIG. An impeller-shaped roller 6 is used to correct curls, waves, etc. of the paper 5 discharged onto the discharge tray 1.

しかし、このようなプリンタや複写機等は構成が複雑に
なり、コスト高になるという問題があった。However, such printers, copying machines, etc. have a problem of complicated configurations and high costs.

本考案はこの問題を解決するためになされたもので、前
記用紙に発生するカールやウェーブを羽根車状のローラ
等を使用せずに矯正して、その枚数を正確に検知できる
排出紙枚数検知装置を提供することを目的とする。The present invention has been developed to solve this problem, and is capable of correcting the curls and waves that occur on the paper without using impeller-like rollers, etc., and detecting the number of ejected sheets accurately. The purpose is to provide equipment.

（問題を解決するための手段および作用）熱定着装置を
備え、この定着装置から排出トレイまでの用紙の搬送距
離が短いプリンタ、複写機等において、排出トレイ上に
高さの異なるリブを複数、用紙の排出方向に沿って設け
、その最も高いリブの延長線上にある機械の用紙排出部
の上方に用紙の枚数を検知するためのセンサを配置する
これにより、前記機械から排出トレイ上に排出される用
紙をリブで、排出方向に沿って中央部を高く、両サイド
を低く湾曲させ、その最も高い部分を前記センサにより
検知する。(Means and effects for solving the problem) In printers, copying machines, etc. that are equipped with a heat fixing device and have a short conveyance distance for paper from the fixing device to the ejection tray, a plurality of ribs of different heights are installed on the ejection tray. A sensor for detecting the number of sheets of paper is placed along the paper ejection direction, and above the paper ejection section of the machine on the extension line of the highest rib.This allows the paper to be ejected from the machine onto the ejection tray. The paper is curved with ribs so that the center part is high and both sides are curved low along the discharge direction, and the highest part is detected by the sensor.

このようにすれば、従来のプリンタや複写機等のように
羽根車状のローラ等を使用しないでも前記センサによる
用紙のセンシングポイントが安定するので、排出紙の枚
数が正確に検知できる。In this way, the paper sensing point by the sensor is stabilized even without using impeller-like rollers as in conventional printers, copying machines, etc., and the number of ejected papers can be accurately detected.

（実施例） 以下本発明を図面に示す実施例に基づいて詳細に説明す
る。(Example) The present invention will be described in detail below based on an example shown in the drawings.

第１図は本発明の一実施例であるプリンタの斜視図であ
る。FIG. 1 is a perspective view of a printer that is an embodiment of the present invention.

機械３には排出トレイ４を上部に配置する。この排出ト
レイ４の上面にはリブ７を三個、用紙の排出方向に沿っ
て設ける。リブ７は中央に位置するものを最も高く設け
、そのサイドの両リブ７は、これよりも低めに設ける。The machine 3 has a discharge tray 4 arranged at the top. Three ribs 7 are provided on the upper surface of the discharge tray 4 along the paper discharge direction. The ribs 7 located in the center are provided at the highest level, and the ribs 7 on the sides are provided lower than this.

この中央のリブ７の延長線にあたる機械３の用紙排出部
ｌの上方に排出用紙の枚数を検知するためのアクチエー
タ２を配置する。An actuator 2 for detecting the number of ejected sheets is arranged above the paper ejecting section l of the machine 3, which is an extension of the central rib 7.

これにより、前記機械３の用紙排出部１から排出トレイ
４上に排出される用紙５を前記リブ７で、第２図に示す
ように湾曲させ、その最も高い部分を前記アクチエータ
２で検知する。As a result, the paper 5 discharged from the paper discharge section 1 of the machine 3 onto the discharge tray 4 is curved by the rib 7 as shown in FIG. 2, and the actuator 2 detects the highest part of the curve.

このようにすれば、前記機械３から排出される用紙は排
出トレイｌ上に設けた三個のリブ７と、自重とによって
第２図に示すように中央部を高く、その両サイドが低く
湾曲され、この湾曲された最も高い箇所を前記アクチエ
ータ２は検知することになる。In this way, the paper discharged from the machine 3 is curved by the three ribs 7 provided on the discharge tray 1 and its own weight, with the central part being high and the both sides thereof being low and curved, as shown in FIG. The actuator 2 detects the highest curved point.

したがって（たとえ、湿気の多い環境下において、前記
用紙５にカールやウェーブが発生することが多くても、
アクチエータ２による用紙５の枚数検知は正確を期すこ
とができる。Therefore (even if the paper 5 often curls or waves in a humid environment,
The actuator 2 can accurately detect the number of sheets of paper 5.

なお、本発明は上記実施例に限定されなければならない
理由はなく、たとえば前記排出トレイ４上に設けるリブ
７は三個よりも多くても良く、また用紙５の枚数を検知
するアクチエータ２は、これを光学センサに変えても良
いことはいうまでもない。It should be noted that there is no reason why the present invention should be limited to the above-mentioned embodiment. For example, the number of ribs 7 provided on the ejection tray 4 may be more than three, and the actuator 2 for detecting the number of sheets of paper 5 may be It goes without saying that this may be replaced with an optical sensor.

（発明の効果） 以上説明したように本考案によれば、たとえ定着装置か
ら排出トレイまでの距離の短い複写機やプリンタ等とい
えども、また湿気の多い環境下においても常に安定して
排出紙の枚数を検知できる効果がある。(Effects of the Invention) As explained above, according to the present invention, even if the distance from the fixing device to the output tray is short, such as a copying machine or a printer, even in a humid environment, the paper can be output stably. This has the effect of being able to detect the number of sheets.

しかも、そのための手段は排出トレイ上に高さの異なる
リブを複数設け、その最も高いリブの館長線上にある機
械の用紙排出部の上方にセンサを配置するといった簡単
な構成で済むから、従来の用紙排出部の近傍にゴム製の
羽根車状のローラ等も設けるといったもの等に比較して
きわめて低コストで済むという効果もある。Moreover, the means for achieving this can be as simple as providing multiple ribs of different heights on the ejection tray and placing a sensor above the paper ejection section of the machine on the director line of the highest rib. Another advantage is that the cost is extremely low compared to a method in which a rubber impeller-like roller or the like is provided near the paper discharge section.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例・であるプリンタの斜視図、
第２図は本発明のセンサによる排出トレイ上の用紙のセ
ンシングポイントを示す図、第３図は従来のプリンタの
斜視図、第４図、第５図、第６図は従来のセンサによる
排出トレイ上の用紙のセンシングポイントを示す図であ
る。 １・・・用紙排出部、２・・・アクチエータ、３・・・
機械、４・・・排出トレイ、５・・・用紙、６・・・羽
根車状のローラ、７・・・リブ。 第１図FIG. 1 is a perspective view of a printer which is an embodiment of the present invention.
Fig. 2 is a diagram showing the sensing points of paper on the ejection tray by the sensor of the present invention, Fig. 3 is a perspective view of a conventional printer, and Figs. 4, 5, and 6 are illustrations of the ejection tray by the conventional sensor. FIG. 7 is a diagram showing sensing points on the upper paper. 1... Paper discharge section, 2... Actuator, 3...
Machine, 4... Ejection tray, 5... Paper, 6... Impeller-shaped roller, 7... Rib. Figure 1

Claims (1)

【特許請求の範囲】[Claims] 熱定着装置を備えたプリンタ、複写機等において、排出
トレイ（４）上に高さの異なるリブ（７）を複数設け、
その最も高いリブ（７）の延長線上にある用紙排出部（
１）の上方に排出紙の枚数を検知するセンサを配置した
ことを特徴とする排出紙枚数検知装置。In printers, copying machines, etc. equipped with a heat fixing device, a plurality of ribs (7) of different heights are provided on the ejection tray (4),
The paper ejection section (
1) A device for detecting the number of ejected sheets, characterized in that a sensor for detecting the number of ejected sheets is arranged above the device.
JP5414488A 1988-03-08 1988-03-08 Device for detecting number of sheet of discharged paper Pending JPH01231755A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5414488A JPH01231755A (en) 1988-03-08 1988-03-08 Device for detecting number of sheet of discharged paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5414488A JPH01231755A (en) 1988-03-08 1988-03-08 Device for detecting number of sheet of discharged paper

Publications (1)

Publication Number Publication Date
JPH01231755A true JPH01231755A (en) 1989-09-18

Family

ID=12962365

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5414488A Pending JPH01231755A (en) 1988-03-08 1988-03-08 Device for detecting number of sheet of discharged paper

Country Status (1)

Country Link
JP (1) JPH01231755A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03192051A (en) * 1989-12-19 1991-08-21 Fuji Xerox Co Ltd Double feed detecting device for paper form
DE19752027A1 (en) * 1997-11-24 1998-10-22 Computer Ges Konstanz Stacking device for single sheets
US7377635B2 (en) * 2004-01-21 2008-05-27 Silverbrook Research Pty Ltd Printer unit employing vertically disposed media storage and collection areas
JP2010097044A (en) * 2008-10-17 2010-04-30 Oki Data Corp Sheet stacking device and image-forming device
JP2010168176A (en) * 2009-01-23 2010-08-05 Ricoh Co Ltd Sheet stacking tray, stacking device, and image forming device
US7883194B2 (en) 2004-01-21 2011-02-08 Silverbrook Research Pty Ltd Printer cartridge with printing fluid, printhead and blotter
US7934789B2 (en) 2004-01-21 2011-05-03 Silverbrook Research Pty Ltd Drive mechanism of printhead cradle
US7946679B2 (en) 2004-01-21 2011-05-24 Silverbrook Research Pty Ltd Print cradle for retaining pagewidth print cartridge
US7950784B2 (en) 2004-01-21 2011-05-31 Silverbrook Research Pty Ltd Compressible ink refill cartridge
US7950792B2 (en) 2004-01-21 2011-05-31 Silverbrook Research Pty Ltd Inkjet printer refill cartridge with sliding moldings
US7954920B2 (en) 2004-01-21 2011-06-07 Silverbrook Research Pty Ltd Inkjet printer assembly with driven mechanisms and transmission assembly for driving driven mechanisms
US7959274B2 (en) 2004-01-21 2011-06-14 Silverbrook Research Pty Ltd Cartridge unit incorporating printhead and ink feed system
US7971960B2 (en) 2004-01-21 2011-07-05 Silverbrook Research Pty Ltd Printhead integrated circuit having longitudinal ink supply channels reinforced by transverse walls

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03192051A (en) * 1989-12-19 1991-08-21 Fuji Xerox Co Ltd Double feed detecting device for paper form
DE19752027A1 (en) * 1997-11-24 1998-10-22 Computer Ges Konstanz Stacking device for single sheets
US7946679B2 (en) 2004-01-21 2011-05-24 Silverbrook Research Pty Ltd Print cradle for retaining pagewidth print cartridge
US7971960B2 (en) 2004-01-21 2011-07-05 Silverbrook Research Pty Ltd Printhead integrated circuit having longitudinal ink supply channels reinforced by transverse walls
US7686446B2 (en) * 2004-01-21 2010-03-30 Tobin Allen King Vertical desktop printer
US7934789B2 (en) 2004-01-21 2011-05-03 Silverbrook Research Pty Ltd Drive mechanism of printhead cradle
US7938519B2 (en) 2004-01-21 2011-05-10 Silverbrook Research Pty Ltd Refill unit for refilling one of a number of ink compartments
US7857436B2 (en) 2004-01-21 2010-12-28 Silverbrook Research Pty Ltd Ink refill unit with incremental ink ejection mechanism
US7883194B2 (en) 2004-01-21 2011-02-08 Silverbrook Research Pty Ltd Printer cartridge with printing fluid, printhead and blotter
US7887169B2 (en) 2004-01-21 2011-02-15 Silverbrook Research Pty Ltd Ink refill unit with incremental ink ejection accuated by print cartridge cradle
US7914140B2 (en) 2004-01-21 2011-03-29 Silverbrook Research Pty Ltd Printer unit with LCD touch screen on lid
US7914136B2 (en) 2004-01-21 2011-03-29 Silverbrook Research Pty Ltd Cartridge unit assembly with ink storage modules and a printhead IC for a printer
US7959274B2 (en) 2004-01-21 2011-06-14 Silverbrook Research Pty Ltd Cartridge unit incorporating printhead and ink feed system
AU2004314466B2 (en) * 2004-01-21 2008-06-26 Memjet Technology Limited A printer unit employing vertically disposed media storage and collection areas
US7942502B2 (en) 2004-01-21 2011-05-17 Silverbrook Research Pty Ltd Print engine cradle with maintenance assembly
US7938518B2 (en) 2004-01-21 2011-05-10 Silverbrook Research Pty Ltd Ink refill unit for an ink reservoir
US7938530B2 (en) 2004-01-21 2011-05-10 Silverbrook Research Pty Ltd Cradle unit for a printer cartridge
US7946697B2 (en) 2004-01-21 2011-05-24 Silverbrook Research Pty Ltd Printing fluid supply device with channeled absorbent material
US7377635B2 (en) * 2004-01-21 2008-05-27 Silverbrook Research Pty Ltd Printer unit employing vertically disposed media storage and collection areas
US7950784B2 (en) 2004-01-21 2011-05-31 Silverbrook Research Pty Ltd Compressible ink refill cartridge
US7950792B2 (en) 2004-01-21 2011-05-31 Silverbrook Research Pty Ltd Inkjet printer refill cartridge with sliding moldings
US7954920B2 (en) 2004-01-21 2011-06-07 Silverbrook Research Pty Ltd Inkjet printer assembly with driven mechanisms and transmission assembly for driving driven mechanisms
US8777217B2 (en) 2008-10-17 2014-07-15 Oki Data Corporation Sheet stacking device and image forming device
US8016287B2 (en) 2008-10-17 2011-09-13 Oki Data Corporation Sheet stacking device and image forming device
JP2010097044A (en) * 2008-10-17 2010-04-30 Oki Data Corp Sheet stacking device and image-forming device
JP2010168176A (en) * 2009-01-23 2010-08-05 Ricoh Co Ltd Sheet stacking tray, stacking device, and image forming device

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