JPH10181944A - Paper residual quantity detecting method of image former - Google Patents

Paper residual quantity detecting method of image former

Info

Publication number
JPH10181944A
JPH10181944A JP8345274A JP34527496A JPH10181944A JP H10181944 A JPH10181944 A JP H10181944A JP 8345274 A JP8345274 A JP 8345274A JP 34527496 A JP34527496 A JP 34527496A JP H10181944 A JPH10181944 A JP H10181944A
Authority
JP
Japan
Prior art keywords
paper
information
remaining amount
detecting
lift
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.)
Granted
Application number
JP8345274A
Other languages
Japanese (ja)
Other versions
JP3661322B2 (en
Inventor
Hiroyuki Nakamura
宏之 中村
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 JP34527496A priority Critical patent/JP3661322B2/en
Publication of JPH10181944A publication Critical patent/JPH10181944A/en
Application granted granted Critical
Publication of JP3661322B2 publication Critical patent/JP3661322B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To detect a residual quantity of paper so accurately without using a pulse motor and an encoder by calculating the residual quantity of load sheets of paper on a ramp with the working time of a motor till this ramp is made to go up and the paper arrives at a position where paper is feedable and the unit time corresponding to the paper information detected value. SOLUTION: In the case where a level sensor of a paper feed tray is turned on at a time when a power source of a copying machine is turned to ON at the opening of work, it is so judged that there is no supply of paper to the paper feed tray after the close of work since the power source has been turned off at the previous day, the residual quantity value of the paper at the close of work the day before is set up (St5) and it is displayed on a display part of the copying machine (St13). In the case where the level sensor is turned off, it is so judged that there is a supply of paper to the paper feed tray, and paper information in this paper feed tray and environmental information are detected (St7) and a lift motor is driven (St9), and time necessary for the lift-up of the paper and required information out of the paper information and the environmental information are all inputted into a preset operation expression and thus operation takes place (St11).

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、プリンタ、複写機
等の画像形成装置の用紙残量検知方法に関し、更に詳し
くは、記録シート(用紙)を昇降台に積載し、昇降台を
上昇させて用紙を装置本体の画像形成部に順次搬送する
給紙装置内の用紙残量検知方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the remaining amount of paper in an image forming apparatus such as a printer or a copying machine, and more particularly, to stacking a recording sheet (paper) on a lift and raising the lift. The present invention relates to a method for detecting a remaining amount of paper in a paper feeding device for sequentially transporting paper to an image forming unit of the apparatus main body.

【0002】[0002]

【従来の技術】例えば、複写機により両面コピーを行う
場合、途中で用紙がなくなると、1度で完了する作業を
2度にわたって行わなければならず、多くの手間、時間
がかかる。このような場合、作業前において用紙の残量
を検知することが特に重要となる。従来、用紙の残量を
検知する方法の一つに、用紙の積載される昇降台を小型
直流モータで駆動し、この小型直流モータの作動時間や
回転数を検出して用紙残量を検知するものがある。とこ
ろが、この小型直流モータは、駆動負荷によって回転速
度が変化するため、単純に作動時間や回転数を用いて用
紙残量を検知すれば、用紙のサイズ、紙質ごとで異なる
駆動負荷により検出値が変動し、正確な用紙残量を検知
することができない。
2. Description of the Related Art For example, when performing double-sided copying using a copying machine, if the paper runs out during the process, the operation to be completed at one time must be performed twice, which takes much labor and time. In such a case, it is particularly important to detect the remaining amount of paper before the operation. Conventionally, as one method of detecting the remaining amount of paper, an elevator on which the paper is loaded is driven by a small DC motor, and the operation time and rotation speed of the small DC motor are detected to detect the remaining amount of paper. There is something. However, since the rotation speed of this small DC motor changes depending on the driving load, simply detecting the remaining amount of paper using the operating time and the number of rotations will result in the detection value being different due to different driving loads depending on the paper size and paper quality. Fluctuates, and it is not possible to accurately detect the remaining amount of paper.

【0003】このような検知精度の低下を解決するため
に、例えば、実開昭62−121234号公報記載に開
示されるペーパ残量表示装置では、駆動モータの回転に
伴い発生するパルス数を検出し、この積算値に基づいて
用紙残量を検知している。また、特開昭58−2223
5号公報記載に開示されるシート残量検出装置では、シ
ート載置台下限位置からの離れを検出するとともに、シ
ート載置台を駆動するパルスモータのパルス信号を検出
し、このパルス信号を所定の設定値から減算カウントす
ることにより、用紙残量を検知している。このようなパ
ルスモータを用いたものでは、駆動負荷に対して出力の
変動がなく、比較的精度良く用紙残量を検知することが
できる。一方、特開平6−191676号公報記載に開
示される用紙残量検出装置では、小型直流モータを用
い、この小型直流モータの回転速度を例えば光学式エン
コーダで検出し、予め作成しておいた回転速度と用紙残
量との関係データから用紙残量を導き出している。この
方法によれば、出力変動の生じる小型直流モータを用い
た場合においても比較的精度良く用紙残量を検知するこ
とができた。
In order to solve such a decrease in detection accuracy, for example, a paper remaining amount display device disclosed in Japanese Utility Model Laid-Open Publication No. 62-112234 detects the number of pulses generated with the rotation of a drive motor. The remaining amount of paper is detected based on the integrated value. Further, Japanese Patent Application Laid-Open No. 58-2223
The sheet remaining amount detecting device disclosed in Japanese Patent Application Laid-Open No. 5-200595 detects a distance from a lower limit position of the sheet mounting table, detects a pulse signal of a pulse motor for driving the sheet mounting table, and sets the pulse signal to a predetermined setting. The remaining amount of paper is detected by counting down from the value. In the apparatus using such a pulse motor, the output does not change with respect to the driving load, and the remaining amount of paper can be detected relatively accurately. On the other hand, in the apparatus for detecting the amount of remaining paper disclosed in Japanese Patent Application Laid-Open No. 6-191676, a small DC motor is used, and the rotation speed of the small DC motor is detected by, for example, an optical encoder. The remaining amount of paper is derived from the relationship data between the speed and the remaining amount of paper. According to this method, the remaining amount of paper can be detected with relatively high accuracy even when a small DC motor causing output fluctuations is used.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上述し
た駆動モータの回転に伴い発生するパルス数を用いて用
紙残量を検知する方法、或いはパルスモータを駆動し、
このパルスモータからのパルス信号を用いて用紙残量を
検知する方法では、構成が複雑となるとともに、高価な
パルスモータが必要となり、コストアップの原因につな
がる問題を有していた。また、小型直流モータを使用
し、その回転速度を光学式エンコーダで検出する方法で
は、安価な小型直流モータが使用できるものの、その回
転速度の検出に高価なエンコーダを使用しなければなら
ず、結局コストアップとなる問題を有していた。本発明
は上記状況に鑑みてなされたもので、高価なパルスモー
タやエンコーダ等を用いずに、用紙の残量を高精度に検
知することのできる画像形成装置の用紙残量検知方法を
提供することにある。
However, a method of detecting the remaining amount of paper using the number of pulses generated with the rotation of the drive motor, or driving the pulse motor,
The method of detecting the remaining amount of paper using a pulse signal from the pulse motor has a problem that the configuration is complicated and an expensive pulse motor is required, which leads to an increase in cost. In the method of using a small DC motor and detecting the rotation speed with an optical encoder, an inexpensive small DC motor can be used, but an expensive encoder must be used to detect the rotation speed. There was a problem that cost was increased. The present invention has been made in view of the above circumstances, and provides a method for detecting a remaining amount of paper in an image forming apparatus capable of detecting the remaining amount of paper with high accuracy without using an expensive pulse motor, encoder, or the like. It is in.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
の本発明に係る画像形成装置の用紙残量検知方法は、昇
降台に積載した用紙の残量を検出する画像形成装置の用
紙残量検知方法において、前記昇降台に積載した用紙の
用紙情報を検出し、駆動モータを作動して前記用紙が給
紙可能な位置に到達するまで前記昇降台を上昇させ、該
駆動モータの前記作動に要した時間を求め、一定量の用
紙をリフトアップするのに要する単位時間を前記用紙情
報ごとに予め記憶しておき、前記用紙情報検出値に対応
する該単位時間と前記作動時間とを用いて前記昇降台に
積載してある用紙の残量を算出することを特徴とするも
のである。そして、前記用紙情報は、用紙サイズ情報と
することができる。また、前記用紙情報は、用紙サイズ
情報及び紙質情報であってもよい。更に、前記用紙情報
は、用紙サイズ情報、紙質情報及び環境情報であっても
よい。また、前記用紙情報は、前記昇降台に積載してあ
る用紙量に応じて定めたものとすることもできる。
According to a first aspect of the present invention, there is provided a method for detecting a remaining amount of paper in an image forming apparatus, the method comprising: detecting a remaining amount of paper loaded on an elevator; In the detection method, the paper information of the paper loaded on the lift table is detected, and the drive motor is operated to raise the lift table until the sheet reaches a position where the paper can be fed. The required time is obtained, a unit time required to lift up a certain amount of paper is stored in advance for each of the paper information, and the unit time and the operating time corresponding to the paper information detection value are used. It is characterized in that the remaining amount of the paper loaded on the elevator is calculated. The paper information can be paper size information. Further, the paper information may be paper size information and paper quality information. Further, the paper information may be paper size information, paper quality information, and environmental information. Further, the paper information may be determined according to the amount of paper loaded on the elevator.

【0006】この画像形成装置の用紙残量検知方法で
は、一定量の用紙をリフトアップするのに要する単位時
間を用紙情報ごとに予め求めておき、昇降台に積載して
ある実際の用紙の用紙情報を検出することで、積載して
ある用紙固有の単位時間を求め、この単位時間に基づ
き、実際に検出した駆動モータ作動時間を用いるので、
用紙条件の違いによって生ずる誤差を排除することがで
き、駆動負荷によって回転速度の変化する小型直流モー
タを用いても、特別な装置を設けることなく、高精度な
用紙の残量検知が可能となる。
In this method of detecting the remaining amount of paper in the image forming apparatus, a unit time required to lift up a fixed amount of paper is previously obtained for each piece of paper information, and the actual paper loaded on the elevator is loaded. By detecting the information, the unit time peculiar to the loaded paper is obtained, and based on the unit time, the actually detected drive motor operation time is used.
It is possible to eliminate an error caused by a difference in paper conditions, and to detect a remaining amount of paper with high accuracy without using a special device even when using a small DC motor whose rotation speed changes depending on a driving load. .

【0007】[0007]

【発明の実施の形態】以下、本発明に係る画像形成装置
の用紙残量検知方法の好適な実施の形態を図面を参照し
て詳細に説明する。図1は本発明に係る用紙残量検知方
法の手順を示すフローチャート、図2は本発明に係る用
紙残量検知方法の給紙状態での手順を示すフローチャー
ト、図3は情報テーブルの説明図、図4は本発明に係る
用紙残量検知方法を実施する装置の概略構成図である。
本発明に係る用紙残量検知方法は、画像形成装置が次の
3つの状態であるときに分けて検知を行う。第一の状態
は、始業時に、複写機の電源をONし、複写機が動作状
態に入ったとき。第二の状態は、動作中の複写機におい
て、昇降台(給紙トレイ)1を一旦引き出し、用紙3の
補給や交換等を行った後、再び給紙トレイ1を装着した
とき。第三の状態は、動作状態の複写機が複写のため給
紙状態にあるときである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method for detecting a remaining amount of paper in an image forming apparatus according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a flowchart showing a procedure of a remaining paper amount detecting method according to the present invention, FIG. 2 is a flowchart showing a procedure in a paper supply state of the remaining paper amount detecting method according to the present invention, FIG. FIG. 4 is a schematic configuration diagram of an apparatus for performing the remaining paper amount detecting method according to the present invention.
In the method for detecting the remaining amount of paper according to the present invention, the detection is separately performed when the image forming apparatus is in the following three states. The first state is when the copier is turned on at the start of operation and the copier enters an operating state. The second state is when the elevating platform (paper feed tray) 1 is once pulled out of the operating copier, the paper 3 is supplied or replaced, and then the paper feed tray 1 is mounted again. The third state is when the copier in the operating state is in the paper feeding state for copying.

【0008】最初に、第一の状態における用紙残量検知
手順を図1に基づき説明する。先ず、始業時に、複写機
の電源がONされた際(st1)、給紙トレイ1のレベ
ルセンサ5のON/OFFを確認する(st3)。レベ
ルセンサ5がONの状態であれば、複写機の電源をOF
Fした前日の終業時以後に、給紙トレイ1へ用紙3が補
給されなかったものと判断し、前日の終業時における用
紙3の残量値を設定して(st5)、複写機の表示部に
表示する(st13)。
First, the procedure for detecting the remaining amount of paper in the first state will be described with reference to FIG. First, at the start of operation, when the power of the copying machine is turned on (st1), it is checked whether the level sensor 5 of the sheet feeding tray 1 is on or off (st3). If the level sensor 5 is ON, the power of the copying machine is turned off.
F, it is determined that the paper 3 has not been replenished to the paper feed tray 1 after the end of the previous day, and the remaining amount of the paper 3 at the end of the previous day is set (st5). (St13).

【0009】一方、レベルセンサ5がOFFとなってい
るときには、電源をOFFした前日の終業時以後に、給
紙トレイ1へ用紙3が補給されたと判断し、給紙トレイ
1内の用紙情報、環境情報を検出する(st7)。
On the other hand, when the level sensor 5 is OFF, it is determined that the paper 3 has been supplied to the paper feed tray 1 after the end of the day before the power was turned off, and the paper information in the paper feed tray 1 is determined. Environment information is detected (st7).

【0010】この用紙情報は、駆動モータ(リフトモー
タ)7の出力を変動させるファクタで、例えば、B5、
A4、A3等の用紙サイズ情報、普通紙、OHP用紙等
の紙質情報等である。また、環境情報は、用紙重量の増
減に係わる湿度等の情報である。用紙サイズ情報は用紙
サイズ検出センサ、紙質情報はOHP識別センサ又は紙
質選択スイッチ等の周知技術を用いて求めることがで
き、環境情報は湿度センサ、用紙含水センサ等の周知技
術を用いて求めることができる。
This paper information is a factor for changing the output of the drive motor (lift motor) 7 and includes, for example, B5,
Paper size information such as A4 and A3, and paper quality information such as plain paper and OHP paper. Further, the environmental information is information such as humidity relating to the increase and decrease of the paper weight. The paper size information can be obtained by using a known technology such as an OHP identification sensor or a paper quality selection switch, and the environmental information can be obtained by using a known technology such as a humidity sensor and a paper moisture sensor. it can.

【0011】次いで、リフトモータ7を駆動し(st
9)、レベルセンサ5がONする位置まで用紙3をリフ
トアップする。この際、リフトアップに要した時間を記
憶演算手段9に記憶しておく。次いで、記憶演算手段9
に記憶してある前日の終業時における用紙残量をリセッ
トし、st7で検出した用紙情報、環境情報のうち必要
な情報と、リフトアップに要した時間とを、予め設定し
てある以下の演算式1に入力して演算を行う(st1
1)。
Next, the lift motor 7 is driven (st
9) The paper 3 is lifted up to a position where the level sensor 5 is turned ON. At this time, the time required for the lift-up is stored in the storage operation means 9. Next, the storage operation means 9
The remaining amount of paper at the end of the previous day stored in the previous day is reset, and the necessary information out of the paper information and environmental information detected in st7 and the time required for lift-up are calculated in advance by the following calculation. Calculation is performed by inputting the expression 1 (st1
1).

【0012】TZ =(T0 −TL )/TT ……演算式1 但し、TZ :用紙残量相当時間値(用紙残量値) T0 :用紙0のときにリフトアップに要する時間 TL :実際に要したリフトアップ時間 TT :一定量の用紙をリフトアップするのに要する単位
時間 である。
T Z = (T 0 −T L ) / T T Equation 1 where T Z : paper remaining time (paper remaining value) T 0 : lift-up required for paper 0 time T L: is a unit required to lift up a certain amount of paper time: actually required lift-up time T T.

【0013】演算式1で、(T0 −TL )は、現在給紙
トレイ1に残っている用紙3のリフトアップに要する時
間を示す。従って、(T0 −TL )を、一定量の用紙を
リフトアップするのに要する単位時間(TT )で除する
ことで、用紙残量値(TZ )を得ることができる。ま
た、T0 、TT の値は、上述の用紙情報、環境情報によ
って異なるものであり、st7で検出した用紙情報、環
境情報に該当する値を、それぞれ予め調べて記憶演算手
段9に記憶しておいた図3に示す用紙サイズテーブル1
1、紙質テーブル13、含水テーブル15から求めて用
いる。
In Equation 1, (T 0 −T L ) indicates the time required for lifting up the paper 3 currently remaining in the paper feed tray 1. Therefore, by dividing (T 0 −T L ) by the unit time (T T ) required to lift up a certain amount of sheets, the remaining sheet value (T Z ) can be obtained. Further, the values of T 0 and T T are different depending on the above-mentioned paper information and environmental information. The values corresponding to the paper information and environmental information detected in st7 are checked in advance and stored in the storage arithmetic means 9. Paper size table 1 shown in FIG. 3
1, the paper quality table 13 and the water content table 15 are used.

【0014】従って、演算式1で得た用紙残量値
(TZ )と、単位時間(TT )にリフトアップできる用
紙3の一定量(例えば、A4を10枚)とを記憶演算手
段9にて乗ずることで、用紙残量が算出されることにな
る。これを、新たな用紙残量として再設定し、複写機の
表示部に表示する(st13)。
Therefore, the remaining amount of paper (T Z ) obtained by the equation (1) and a certain amount of paper 3 (for example, 10 sheets of A4) which can be lifted up in the unit time (T T ) are stored in the arithmetic operation means 9. , The remaining amount of paper is calculated. This is reset as a new paper remaining amount and displayed on the display unit of the copying machine (st13).

【0015】残量表示は、段階的に分けて表示すること
ができる。例えば、最大積載量をNとしたとき、 (用紙残量値) (表示例) 0のとき NO PAPER 1(TT のリフトアップ量)〜N/4のとき LOW PAPER N/4〜2N/4のとき 1/2 PAPER 2N/4〜3N/4のとき 3/4 PAPER 3N/4〜Nのとき FULL PAPER の如きである。
The display of the remaining amount can be divided and displayed step by step. For example, when the maximum load capacity was N, LOW when the (paper remaining value) (lift-up amount of T T) NO PAPER 1 when (Display Example) 0 ~N / 4 PAPER N / 4~2N / 4 When 1 / 2PAPER 2N / 4 to 3N / 4 3/4 PAPER When 3N / 4 to N, it is like FULL PAPER.

【0016】また、単位時間(TT )は、正確には上述
の用紙情報、環境情報の他、用紙3の残量によっても異
なる。従って、用紙残量を段階的に定め、この段階に応
じたそれぞれ異なる単位時間を求めておくことで、更に
精度の高い単位時間(TTH)を得ることができる。この
残量に応じて調べた単位時間(TTH)を図3に示す用紙
残量テーブル17に用紙残量別情報として記憶してお
き、上述の演算式1の分母に用いれば、用紙3の残量検
知を更に高精度なものにすることができる。
In addition, the unit time (T T ) depends on the remaining amount of paper 3 in addition to the above-mentioned paper information and environmental information. Therefore, the unit time (T TH ) with higher accuracy can be obtained by determining the remaining amount of paper step by step and obtaining different unit times according to this step. The unit time (T TH ) determined according to the remaining amount is stored in the remaining sheet amount table 17 shown in FIG. It is possible to make the remaining amount detection more accurate.

【0017】次に、第二の状態における用紙残量検知手
順を説明する。第二の状態は、上述したように、動作中
の複写機において、給紙トレイ1を再装着したときの状
態であるため、第一の状態で、レベルセンサ5がOFF
となっているときと同じ状態となる。従って、図1のs
t7以降の手順と同様の手順を行うことにより用紙3の
残量を検知し、表示することができる。
Next, the procedure for detecting the remaining amount of paper in the second state will be described. As described above, the second state is a state in which the sheet feeding tray 1 is remounted in the operating copier, and therefore, in the first state, the level sensor 5 is turned off.
Is the same as when. Therefore, s in FIG.
By performing the same procedure as the procedure after t7, the remaining amount of the paper 3 can be detected and displayed.

【0018】次に、第三の状態における用紙残量検知手
順を図2に基づき説明する。この状態では、上述したよ
うに、複写機が給紙状態にあり、給紙トレイ1から用紙
3を画像形成部へ供給している(st15)。用紙3の
給紙により、給紙トレイ1のレベルセンサ5がOFFに
なったことを確認したなら(st17)、リフトモータ
7を単位時間(TT )駆動させて、用紙3をリフトアッ
プする(st19)。
Next, the procedure for detecting the remaining amount of paper in the third state will be described with reference to FIG. In this state, as described above, the copying machine is in the paper feeding state, and the paper 3 is being supplied from the paper feeding tray 1 to the image forming unit (st15). The feeding of the sheet 3, the level sensor 5 of the paper feed tray 1 if it was confirmed that became OFF (ST17), the lift motor 7 a unit time (T T) was driven to lift up the sheet 3 ( st19).

【0019】この際、用紙3のシフトアップは、レベル
センサ5がONするか否かにかかわらず、単位時間(T
T )だけリフトアップする。これにより、重い用紙、軽
い用紙等による時間の誤差を排除することができる。従
って、単位時間(TT )だけリフトアップしたのである
から、用紙残量値(TZ )から1を減じて(st2
1)、これに単位時間(TT )にリフトアップできる用
紙3の一定量を乗ずることで、単位時間(TT )リフト
アップした後の用紙残量が算出されることになる。つま
り、単位時間(TT )にリフトアップした用紙3の一定
量を給紙トレイ1に積載してある用紙3から減じること
で、現在の用紙残量が検出されることになる(st2
3)。これを、新たな用紙残量として再設定し、複写機
の表示部に表示する(st25)。
At this time, the shift up of the sheet 3 is performed in the unit time (T) regardless of whether the level sensor 5 is turned on.
T ) just lift up. As a result, time errors due to heavy paper, light paper, and the like can be eliminated. Accordingly, since the lift has been performed by the unit time (T T ), 1 is subtracted from the remaining sheet value (T Z ) (st 2
1), by multiplying the fixed amount of the sheet 3 can be lifted up to the unit time (T T), so that the unit time (T T) remaining paper after the lift-up is calculated. That is, the current remaining amount of paper 3 is detected by subtracting a certain amount of the paper 3 lifted up per unit time (T T ) from the paper 3 loaded on the paper feed tray 1 (st2).
3). This is reset as a new paper remaining amount and displayed on the display unit of the copying machine (st25).

【0020】なお、上述の実施形態で説明した用紙情報
(用紙サイズ情報、紙質情報)、環境情報、用紙残量別
情報は、全ての情報、或いはそれぞれ所望のものを用い
て演算を行うことができる。従って、用紙サイズ情報の
みを用いることとすれば、用紙サイズ情報テーブルのみ
を記憶しておき、用紙サイズ情報のみを検出し、用紙サ
イズ情報テーブルから検出値に相当するT0 、TT を求
めて演算を行う。
The paper information (paper size information, paper quality information), environmental information, and information on the remaining amount of paper described in the above-described embodiment can be calculated using all information or desired information. it can. Therefore, if only the paper size information is used, only the paper size information table is stored, only the paper size information is detected, and T 0 and T T corresponding to the detected values are obtained from the paper size information table. Perform the operation.

【0021】また、用紙サイズ情報、紙質情報を用いる
場合には、用紙サイズ情報テーブル、紙質情報テーブル
を記憶しておき、用紙サイズ情報、紙質情報を検出し、
用紙サイズ情報テーブル、紙質情報テーブルからそれぞ
れの検出値を満足するT0 、TT を求めて演算を行う。
このとき、T0 、TT は、用紙サイズ情報テーブル、紙
質情報テーブルを階層的(図3参照)、又はマトリック
ス的な情報として記憶しておくことで、例えば用紙3が
A4サイズで、且つ紙質が紙である場合のT0、T
T (例えば、T0 =4、TT =0.2)を特定すること
ができる。
When the paper size information and the paper quality information are used, the paper size information table and the paper quality information table are stored, and the paper size information and the paper quality information are detected.
The calculation is performed by obtaining T 0 and T T that satisfy the respective detection values from the paper size information table and the paper quality information table.
At this time, T 0 and T T are stored in a paper size information table and a paper quality information table as hierarchical (see FIG. 3) or matrix information. T 0 and T when is paper
T (for example, T 0 = 4, T T = 0.2) can be specified.

【0022】[0022]

【発明の効果】以上詳細に説明したように、本発明に係
る画像形成装置の用紙残量検知方法によれば、用紙情報
を検出し、駆動モータの作動時間を求め、一定量の用紙
をリフトアップするのに要する単位時間を記憶してお
き、用紙情報検出値に対応する単位時間と作動時間とを
用いて用紙の残量を検知するようにしたので、駆動負荷
によって出力の変化する小型直流モータの欠点を補い、
高価なパルスモータやエンコーダ等を用いずに、安価な
小型直流モータを用いて用紙の残量を高精度に検知する
ことができる。また、新たな部材を追加することなく、
ソフトウエアの変更のみで実施できるので、既存装置に
対しても容易に用紙残量検知機能を付加することができ
る。
As described above in detail, according to the method for detecting the amount of remaining paper in the image forming apparatus according to the present invention, the paper information is detected, the operation time of the drive motor is obtained, and a certain amount of paper is lifted. The unit time required to raise the paper is stored, and the remaining amount of paper is detected using the unit time corresponding to the paper information detection value and the operation time. Make up for the shortcomings of the motor,
The remaining amount of paper can be detected with high accuracy using an inexpensive small DC motor without using an expensive pulse motor or encoder. Also, without adding new members,
Since the present invention can be implemented only by changing software, a function for detecting the remaining amount of paper can be easily added to an existing apparatus.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明に係る用紙残量検知方法の手順を示す
フローチャートである。
FIG. 1 is a flowchart illustrating a procedure of a remaining paper amount detecting method according to the present invention.

【図2】 本発明に係る用紙残量検知方法の給紙状態で
の手順を示すフローチャートである。
FIG. 2 is a flowchart showing a procedure in a paper supply state of the paper remaining amount detection method according to the present invention.

【図3】 情報テーブルの説明図である。FIG. 3 is an explanatory diagram of an information table.

【図4】 本発明に係る用紙残量検知方法を実施する装
置の概略構成図である。
FIG. 4 is a schematic configuration diagram of an apparatus for executing a remaining paper amount detecting method according to the present invention.

【符号の説明】[Explanation of symbols]

1 給紙トレイ(昇降台) 3 用紙 7 駆動モータ 9 記憶演
算手段
DESCRIPTION OF SYMBOLS 1 Paper feed tray (elevation platform) 3 Paper 7 Drive motor 9 Storage calculation means

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 昇降台に積載した用紙の残量を検出する
画像形成装置の用紙残量検知方法において、 前記昇降台に積載した用紙の用紙情報を検出し、 駆動モータを作動して前記用紙が給紙可能な位置に到達
するまで前記昇降台を上昇させ、 該駆動モータの前記作動に要した時間を求め、 一定量の用紙をリフトアップするのに要する単位時間を
前記用紙情報ごとに予め記憶しておき、 前記用紙情報検出値に対応する該単位時間と前記作動時
間とを用いて前記昇降台に積載してある用紙の残量を算
出することを特徴とする画像形成装置の用紙残量検知方
法。
1. A sheet remaining amount detecting method for an image forming apparatus for detecting a remaining amount of sheets loaded on an elevator, detecting sheet information of sheets loaded on the elevator, and operating a driving motor to drive the sheet. The elevator is raised until the paper reaches a position where paper can be fed, the time required for the operation of the drive motor is obtained, and the unit time required to lift up a certain amount of paper is previously determined for each of the paper information. Storing the remaining amount of sheets loaded on the elevator using the unit time corresponding to the detected sheet information value and the operation time. Amount detection method.
【請求項2】 前記用紙情報は、用紙サイズ情報である
ことを特徴とする請求項1記載の画像形成装置の用紙残
量検知方法。
2. The method according to claim 1, wherein the paper information is paper size information.
【請求項3】 前記用紙情報は、用紙サイズ情報及び紙
質情報であることを特徴とする請求項1記載の画像形成
装置の用紙残量検知方法。
3. The method according to claim 1, wherein the paper information is paper size information and paper quality information.
【請求項4】 前記用紙情報は、用紙サイズ情報、紙質
情報及び環境情報であることを特徴とする請求項1記載
の画像形成装置の用紙残量検知方法。
4. The method according to claim 1, wherein the paper information is paper size information, paper quality information, and environmental information.
【請求項5】 前記用紙情報は、前記昇降台に積載して
ある用紙量に応じて定めたものであることを特徴とする
請求項1記載の画像形成装置の用紙残量検知方法。
5. The method according to claim 1, wherein the sheet information is determined according to an amount of sheets stacked on the elevator.
JP34527496A 1996-12-25 1996-12-25 Paper remaining amount detection method of image forming apparatus Expired - Fee Related JP3661322B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34527496A JP3661322B2 (en) 1996-12-25 1996-12-25 Paper remaining amount detection method of image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34527496A JP3661322B2 (en) 1996-12-25 1996-12-25 Paper remaining amount detection method of image forming apparatus

Publications (2)

Publication Number Publication Date
JPH10181944A true JPH10181944A (en) 1998-07-07
JP3661322B2 JP3661322B2 (en) 2005-06-15

Family

ID=18375490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34527496A Expired - Fee Related JP3661322B2 (en) 1996-12-25 1996-12-25 Paper remaining amount detection method of image forming apparatus

Country Status (1)

Country Link
JP (1) JP3661322B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006347672A (en) * 2005-06-15 2006-12-28 Kyocera Mita Corp Paper feeding device and image forming device with the same
JP2008127154A (en) * 2006-11-21 2008-06-05 Kyocera Mita Corp Method of computing stacked quantity of sheet material and method of computing supply quantity of sheet material in paper feeding device, and paper feeding device
US8025284B2 (en) 2008-12-02 2011-09-27 Fuji Xerox Co., Ltd. Remaining sheet volume detecting apparatus and image forming apparatus
US8302959B2 (en) 2008-10-27 2012-11-06 Fuji Xerox Co., Ltd. Remaining sheet volume detecting apparatus and image forming apparatus
JP2014136640A (en) * 2013-01-18 2014-07-28 Canon Inc Sheet feeder and image forming apparatus
JP2019189395A (en) * 2018-04-24 2019-10-31 キヤノン株式会社 Sheet feeding device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006347672A (en) * 2005-06-15 2006-12-28 Kyocera Mita Corp Paper feeding device and image forming device with the same
JP2008127154A (en) * 2006-11-21 2008-06-05 Kyocera Mita Corp Method of computing stacked quantity of sheet material and method of computing supply quantity of sheet material in paper feeding device, and paper feeding device
US8302959B2 (en) 2008-10-27 2012-11-06 Fuji Xerox Co., Ltd. Remaining sheet volume detecting apparatus and image forming apparatus
US8025284B2 (en) 2008-12-02 2011-09-27 Fuji Xerox Co., Ltd. Remaining sheet volume detecting apparatus and image forming apparatus
JP2014136640A (en) * 2013-01-18 2014-07-28 Canon Inc Sheet feeder and image forming apparatus
JP2019189395A (en) * 2018-04-24 2019-10-31 キヤノン株式会社 Sheet feeding device

Also Published As

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