JP2001063834A - Paper feeding device - Google Patents
Paper feeding deviceInfo
- Publication number
- JP2001063834A JP2001063834A JP24442099A JP24442099A JP2001063834A JP 2001063834 A JP2001063834 A JP 2001063834A JP 24442099 A JP24442099 A JP 24442099A JP 24442099 A JP24442099 A JP 24442099A JP 2001063834 A JP2001063834 A JP 2001063834A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- sheet
- loading table
- pressing
- feeding device
- 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
Links
Landscapes
- Controlling Sheets Or Webs (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複写機、印刷機及
びファクシミリの如き画像形成機に装備され、表面に画
像を形成すべきシート状紙を送出する給紙装置、更に詳
しくは積載台上に積載された複数枚のシート状紙のうち
の最上位の紙を吸引して送出する吸引送出手段を具備す
る形態の給紙装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder mounted on an image forming machine such as a copying machine, a printing machine, and a facsimile machine for feeding a sheet of paper on which an image is to be formed on a surface, and more particularly, on a loading table. The present invention relates to a sheet feeding device having a suction sending unit that sucks and sends out the top sheet out of a plurality of sheet-like sheets stacked on a sheet.
【０００２】[0002]
【従来の技術】特開平６−１０７３４７号公報には、画
像形成機に装備される給紙装置として、積載された複数
枚のシート状紙のうちの最上位の紙を吸引して送出する
形態の、一般に吸引式と称される給紙装置が開示されて
いる。かかる給紙装置は、シート状紙収容手段、紙浮上
及び分離手段、並びに吸引送出手段を具備している。シ
ート状紙収容手段は、作用位置とこの作用位置から引き
出された非作用位置との間を移動自在に装着された可動
枠体と、この可動枠体に昇降動自在に装着された積載台
とを含んでいる。可動枠体が非作用位置に引き出されて
積載台上に複数枚のシート状紙が所要とおりに積載さ
れ、しかる後に可動枠体が作用位置に戻されて、積載台
上に積載された複数枚のシート状紙が紙浮上及び分離手
段並びに吸引送出手段に対して所要とおりに位置せしめ
られる。紙浮上及び分離手段は、積載台上に積載された
複数枚のシート状紙の上部前端に送風し、上部の数枚の
紙を浮上せしめると共に最上位の紙をそれより下の紙か
ら分離せしめる。吸引送出手段は多数の吸引孔が形成さ
れた無端ベルトを含んでおり、積載台上の最上位の紙を
ベルト表面に吸引し、吸引した紙をベルトの回転によっ
て所要方向に送出する。送出された紙は、搬送ローラ対
から構成することができる搬送手段に供給され、次いで
所要搬送径路を通して搬送される。2. Description of the Related Art Japanese Unexamined Patent Publication No. Hei 6-107347 discloses a form in which a top sheet of a plurality of stacked sheets is sucked and sent as a sheet feeder provided in an image forming machine. A paper feeder generally referred to as a suction type is disclosed. Such a paper feeder is provided with a sheet-shaped paper storage means, a paper floating / separating means, and a suction / delivery means. The sheet-shaped paper storage means includes a movable frame movably mounted between an operation position and a non-operation position pulled out of the operation position, and a loading table movably mounted on the movable frame. Contains. The movable frame is pulled out to the non-operating position, a plurality of sheets of paper are stacked on the loading table as required, and then the movable frame is returned to the operating position, and the plurality of sheets stacked on the loading table are thereafter returned. Is positioned as required with respect to the paper floating and separating means and the suction and delivery means. The paper floating and separating means blows air to the upper front end of the plurality of sheet-like papers stacked on the loading table, causes the upper several sheets to float, and separates the uppermost paper from the lower paper. . The suction and delivery means includes an endless belt having a large number of suction holes formed therein, sucks the topmost paper on the loading table onto the belt surface, and delivers the sucked paper in a required direction by rotation of the belt. The delivered paper is supplied to a conveying means which can be constituted by a pair of conveying rollers, and then conveyed through a required conveying path.
【０００３】給紙装置には、更に、紙押え及び検出手段
も配設されている。この紙押圧及び検出手段は、支持部
材、積載台に向かう方向及びこれから離れる方向に所定
範囲に渡って移動自在に支持部材に装着された押圧部
材、及び押圧部材の位置を検出するための検出機を含ん
でいる。押圧部材はその下端が積載台上の複数枚のシー
ト状紙のうちの最上位の紙に押圧され、これによって上
記紙浮上・分離手段からの送風によって積載台上の紙が
後方に移動せしめられるのを阻止する。また、押圧部材
を位置即ち高さを検出器によって検出することによっ
て、押圧部材の下端が押圧されているところの積載台上
の最上位の紙の高さが検出される。積載台上の紙が相当
枚数消費され、積載台上の最上位の紙の高さが所定閾値
より低くなると、積載台が所要量だけ上昇せしめられ
る。[0003] The paper feeder is further provided with paper holding and detecting means. The paper pressing and detecting means includes a supporting member, a pressing member movably mounted on the supporting member in a direction toward and away from the loading table over a predetermined range, and a detector for detecting the position of the pressing member. Contains. The lower end of the pressing member is pressed against the uppermost sheet of the plurality of sheet-like sheets on the loading table, whereby the paper on the loading table is moved rearward by the air from the paper floating / separating means. To block. Further, by detecting the position, that is, the height, of the pressing member by the detector, the height of the uppermost sheet on the loading table where the lower end of the pressing member is pressed is detected. When a considerable number of sheets on the loading table are consumed and the height of the topmost sheet on the loading table becomes lower than a predetermined threshold, the loading table is raised by a required amount.
【０００４】[0004]
【発明が解決しようとする課題】而して、上述した形態
の従来の給紙装置には、次の通りの解決すべき問題が存
在する。積載台上に積載されているシート状紙を寸法が
異なったシート状紙に交換する場合には、可動枠体を作
用位置から非作用位置に引き出すことが必要であるが、
この際には可動枠体の引き出しに先立って、積載台上に
積載されているシート状紙の最上位の紙に押圧されてい
る押圧部材を上方に移動せしめて最上位の紙から上方に
離隔せしめることが必要である。また、積載台上に複数
枚のシート状紙を積載した後に、可動枠体を非作用位置
から作用位置に戻す際にも、押圧部材を上方に移動せし
めて、積載台上の最上位の紙に押圧部材が作用しないよ
うにせしめることが必要である。さもなくば、可動枠体
の引き出しに応じて積載台が移動せしめられる際に、押
圧部材による押圧によって最上位の紙の移動が阻止さ
れ、最上位の紙が、そしてまた場合によってはその下方
に位置する数枚の紙も、積載台から脱落してしまう。然
るに、従来の給紙装置においては、必要に応じて押圧部
材を上方に移動せしめて積載台上の最上位の紙から上方
に離脱せしめる好適手段が配設されておらず、押圧部材
を上方に移動せしめるための煩雑な手動操作が必要であ
る。However, the conventional paper feeder of the above-described embodiment has the following problems to be solved. When replacing the sheet-like paper loaded on the loading table with a sheet-like paper having a different size, it is necessary to pull out the movable frame from the working position to the non-working position.
In this case, prior to pulling out the movable frame, the pressing member pressed against the uppermost sheet of the sheet-like paper stacked on the stacking table is moved upward to separate it upward from the uppermost sheet. It is necessary to make a mistake. Also, after stacking a plurality of sheets of paper on the loading table, when returning the movable frame from the non-operating position to the operating position, the pressing member is moved upward, and the uppermost sheet on the loading table is moved. It is necessary to prevent the pressing member from acting. Otherwise, when the loading table is moved in accordance with the withdrawal of the movable frame, the movement of the topmost paper is prevented by the pressing by the pressing member, and the topmost paper and, if necessary, below it. Several sheets of paper fall off the loading platform. However, in the conventional paper feeder, there is no suitable means for moving the pressing member upward as needed to separate the pressing member upward from the uppermost sheet on the loading table. A complicated manual operation for moving is required.
【０００５】更に、従来の給紙装置においては、積載台
上から最上位の１枚と共にこれに付随してその直ぐ下方
の１枚或いは数枚の紙も同時に送出されてしまう所謂重
送が発生する、或いは紙浮上及び分離手段及び吸引送出
手段が作動せしめられたにもかかわらず積載台上から最
上位の紙も送出されない所謂給紙不良が発生する、こと
が少なくなかった。Further, in the conventional sheet feeding apparatus, a so-called double feed occurs in which one or several sheets immediately below the uppermost sheet from the loading table are simultaneously sent together with the uppermost sheet. In other words, a so-called paper feeding failure occurs in which the top sheet is not fed from the loading table even though the paper floating / separating means and the suction feeding means are operated.
【０００６】本発明は上記事実に鑑みてなされたもので
あり、その第一の技術的課題は、シート状紙収容手段の
可動枠体が作用位置から非作用位置に移動せしめられる
際、そしてまた非作用位置から作用位置に移動せしめら
れる際には、押圧部材が自動的に上方に位置せしめられ
る、新規且つ改良された給紙装置を提供することであ
る。[0006] The present invention has been made in view of the above-mentioned facts, and a first technical problem thereof is that when the movable frame of the sheet-like paper storage means is moved from the working position to the non-working position, and SUMMARY OF THE INVENTION It is an object of the present invention to provide a new and improved sheet feeding device in which a pressing member is automatically positioned upward when moved from a non-operation position to an operation position.
【０００７】本発明の第二の目的は、積載台上から複数
枚の紙が送出されてしまう重送、及び積載台上から紙が
送出されない給紙不良の発生が充分に少ない、新規且つ
改良された給紙装置を提供することである。A second object of the present invention is to provide a new and improved double feed in which a plurality of sheets are sent out from the loading table and a paper feed failure in which the sheets are not sent out from the loading table are sufficiently reduced. The purpose of the present invention is to provide an improved paper feeder.
【０００８】[0008]
【課題を解決するための手段】本発明の一局面において
は、上記第一の技術的課題を達成するために、紙押え及
び検出手段の支持部材が、押圧及び検出位置と離隔位置
との間を移動自在に装着されシート状紙収容手段の可動
枠体が作用位置に移動せしめられると、紙押え及び検出
手段の支持部材が押圧及び検出位置に位置せしめられ
て、押圧部材が積載台上に積載されたシート状紙の最上
位の紙に押圧せしめられ、シート状紙収容手段の可動枠
体が作用位置から非作用位置に向けて移動される際に
は、紙押え及び検出手段の支持部材が押圧及び検出位置
から離隔位置に移動せしめられて、押圧部材が該積載台
上に積載されたシート状紙の最上位の紙から上方に離隔
せしめられる。According to one aspect of the present invention, in order to achieve the first technical problem, a supporting member of a paper presser and a detector is provided between a pressing and detecting position and a separating position. When the movable frame of the sheet-shaped paper storage means is moved to the operation position, the support member of the paper presser and the detection means is positioned at the pressing and detecting positions, and the pressing member is placed on the loading table. When the movable frame body of the sheet-shaped paper storage means is moved from the working position to the non-working position by being pressed against the uppermost sheet of the stacked sheet-shaped paper, the supporting member of the paper pressing and detecting means is provided. Is moved from the pressing and detecting position to the separating position, and the pressing member is separated upward from the uppermost sheet of the sheet-like sheets stacked on the stacking table.
【０００９】即ち、本発明の一局面に従えば、上記第一
の技術的課題を達成する給紙装置として、複数枚のシー
ト状紙が積載される、昇降動自在に装着された積載台を
含むシート状紙収容手段と、該積載台上に積載された複
数枚のシート状紙の上部前端に送風する紙浮上及び分離
手段、該積載台上に積載された複数枚のシート状紙のう
ちの最上位の紙を吸引して送出するための吸引送出手段
と、支持部材、該積載台に向かう方向およびこれから離
れる方向に所定範囲に渡って移動自在に該支持部材に装
着された押圧部材及び該押圧部材の位置を検出するため
の検出器を含む紙押え及び検出手段とを具備する給紙装
置において、該シート状紙収容手段は作用位置と該作用
位置から引き出された非作用位置との間を移動自在に装
着された可動枠体を含み、該積載台は該可動枠体に装着
されており、該紙押え及び検出手段の該支持部材は、押
圧及び検出位置と離隔位置との間を移動自在に装着され
ており、該シート状紙収容手段の該可動枠体が該作用位
置に移動せしめられると、該紙押え及び検出手段の該支
持部材が該押圧及び検出位置に位置せしめられて、該押
圧部材が該積載台上に積載されたシート状紙の最上位の
紙に押圧せしめられ、該シート状紙収容手段の該可動枠
体が該作用位置から該非作用位置に向けて移動される際
には、該紙押え及び検出手段の該支持部材が該押圧及び
検出位置から該離隔位置に移動せしめられて、該押圧部
材が該積載台上に積載されたシート状紙の最上位の紙か
ら上方に離隔せしめられる、ことを特徴とする給紙装置
が提供される。That is, according to one aspect of the present invention, as a paper feeder for achieving the first technical problem, a loading table on which a plurality of sheet-like papers are loaded and which is mounted to be movable up and down is provided. Sheet-containing paper containing means, paper floating and separating means for blowing the upper front end of a plurality of sheets of paper stacked on the loading table, and a plurality of sheets of paper loaded on the loading table. A suction sending means for sucking and sending the uppermost paper of the support member, a support member, a pressing member movably mounted on the support member in a direction toward and away from the loading table over a predetermined range, and In a paper feeder comprising a paper presser and a detector including a detector for detecting the position of the pressing member, the sheet-like paper storage means is provided between an operation position and a non-operation position pulled out of the operation position. Movable frame body movably mounted between Wherein the loading table is mounted on the movable frame, and the support member of the paper presser and the detecting means is movably mounted between a pressing and detecting position and a separating position, and the When the movable frame of the paper storage means is moved to the operation position, the support member of the paper presser and the detection means is positioned at the pressing and detecting position, and the pressing member is loaded on the loading table. When the movable frame of the sheet-shaped paper receiving means is moved from the working position to the non-working position, the paper pressing and detecting means is pressed. The supporting member is moved from the pressing and detecting position to the separating position, and the pressing member is separated upward from the uppermost sheet of the sheet-like paper stacked on the stacking table. Is provided.
【００１０】好適実施形態においては、該紙押え及び検
出手段は該支持部材を該離隔位置に弾性的に偏倚する弾
性偏倚部材を含み、該シート状紙収容手段の該可動枠体
が該作用位置に移動せしめられると、該可動枠体が該支
持部材に当接して該弾性偏倚手段の弾性偏倚作用に抗し
て該支持部材を該押圧及び検出位置に移動せしめる。該
シート状紙収容手段の該給紙枠体は該作用位置から実質
上水平に前方に引き出されて該非作用位置に移動せしめ
られ、該可動枠体にはその後面から後方に突出する当接
片が配設されており、該シート状紙収容手段の該可動枠
体が該作用位置に移動せしめられると、該当接片が該支
持部材に当接する。該紙押え及び検出手段の該支持部材
は該押圧及び検出位置と該離隔位置との間を旋回動自在
に装着されている。In a preferred embodiment, the paper holding and detecting means includes an elastic biasing member for elastically biasing the support member to the separated position, and wherein the movable frame of the sheet-like paper receiving means is in the operating position. When the movable frame is moved, the movable frame abuts on the support member and moves the support member to the pressing and detecting position against the elastic biasing action of the elastic biasing means. The sheet feeding frame of the sheet-shaped paper accommodating means is pulled out substantially horizontally forward from the working position and is moved to the non-working position, and the movable frame has a contact piece projecting rearward from a rear surface thereof. Is disposed, and when the movable frame of the sheet-shaped paper accommodating means is moved to the operating position, the contact piece comes into contact with the support member. The support member of the paper holding and detecting means is mounted so as to be pivotable between the pressing and detecting position and the separated position.
【００１１】本発明の他の局面においては、上記第一の
技術的課題を達成するために、シート状紙押圧及び検出
手段には、押圧部材を積載台に向けて弾性的に偏倚する
弾性押圧手段、及び選択的に作用せしめられて弾性押圧
手段の弾性偏倚作用に抗して押圧部材を積載台から離隔
する方向に移動せしめるための押圧解除手段を配設し、
該シート状紙収容手段の可動枠体が作用位置に移動せし
められると、押圧解除手段の解除作用が消失せしめられ
て、押圧部材が積載台上に積載されたシート状紙の最上
位の紙に押圧せしめられ、シート状紙収容手段の可動枠
体が作用位置から非作用位置に向けて移動される際に
は、押圧解除手段の解除作用によって、押圧部材が該積
載台上に積載されたシート状紙の最上位の紙から上方に
離隔せしめられる。In another aspect of the present invention, in order to achieve the first technical problem, the sheet-like paper pressing and detecting means includes an elastic pressing member which elastically biases the pressing member toward the loading table. Means, and press release means for selectively acting to move the pressing member away from the loading table against the elastic biasing action of the elastic pressing means,
When the movable frame of the sheet-shaped paper accommodating means is moved to the operation position, the releasing action of the pressing release means is lost, and the pressing member is moved to the uppermost sheet of the sheet-shaped paper loaded on the loading table. When the movable frame body of the sheet-shaped paper accommodating means is moved from the working position to the non-working position by being pressed, the pressing member is released by the pressing releasing means so that the pressing member is stacked on the loading table. It is spaced upwardly from the topmost sheet of paper.
【００１２】即ち、本発明の他の局面に従えば、上記第
一の技術的課題を達成する給紙装置として、複数枚のシ
ート状紙が積載される、昇降動自在に装着された積載台
を含むシート状紙収容手段と、該積載台上に積載された
複数枚のシート状紙の上部前端に送風する紙浮上及び分
離手段、該積載台上に積載された複数枚のシート状紙の
うちの最上位の紙を吸引して送出するための吸引送出手
段と、支持部材、該積載台に向かう方向およびこれから
離れる方向に所定範囲に渡って移動自在に該支持部材に
装着された押圧部材及び該押圧部材の位置を検出するた
めの検出器を含む紙押え及び検出手段とを具備する給紙
装置において、該シート状紙収容手段は作用位置と該作
用位置から引き出された非作用位置との間を移動自在に
装着された可動枠体を含み、該積載台は該可動枠体に装
着されており、該シート状紙押圧及び検出手段は、選択
的に作用せしめられて該押圧部材を該積載台から離隔す
る方向に移動せしめるための押圧解除手段を含み、該シ
ート状紙収容手段の該可動枠体が該作用位置に移動せし
められると、該押圧解除手段の解除作用が消失せしめら
れて、該押圧部材が該積載台上に積載されたシート状紙
の最上位の紙に押圧せしめられ、該シート状紙収容手段
の該可動枠体が該作用位置から該非作用位置に向けて移
動される際には、該押圧解除手段の解除作用によって、
該押圧部材が該積載台上に積載されたシート状紙の最上
位の紙から上方に離隔せしめられる、ことを特徴とする
給紙装置が提供される。That is, according to another aspect of the present invention, as a paper feeder for achieving the first technical problem, a loading table on which a plurality of sheet-like papers are loaded and which is mounted so as to be movable up and down. And a sheet floating and separating means for blowing air to the upper front end of the plurality of sheets stacked on the stacking table, and a plurality of sheets of paper stacked on the stacking table. A suction and delivery means for sucking and delivering the uppermost sheet of the paper, a support member, and a pressing member movably mounted on the support member in a direction toward and away from the loading table over a predetermined range. And a paper holding device including a paper presser and a detector including a detector for detecting the position of the pressing member, wherein the sheet-shaped paper storage unit has an operating position and a non-operating position pulled out from the operating position. Movable frame movably mounted between Wherein the loading table is mounted on the movable frame, and the sheet-shaped paper pressing and detecting means is selectively actuated to move the pressing member in a direction away from the loading table. When the movable frame of the sheet-shaped paper accommodating means is moved to the operating position, the releasing action of the pressing releasing means is lost, and the pressing member is loaded on the loading table. When the movable frame of the sheet-shaped paper storage means is moved from the working position to the non-working position, the pressing release means is released. By action
A sheet feeding device is provided, wherein the pressing member is separated upward from a topmost sheet of the sheet-like sheets stacked on the stacking table.
【００１３】該押圧解除手段は電磁ソレノイドから構成
されているのが好都合である。Conveniently, the pressing release means comprises an electromagnetic solenoid.
【００１４】本発明の更に他の局面においては、上記第
二の技術的課題を達成するために、積載台上のシート状
紙の最上位の紙に対する、紙押え及び検出手段の押圧部
材の押圧位置、押圧力、及び又は接触面積が所定範囲に
設定される。In another aspect of the present invention, in order to achieve the second technical problem, the pressing member of the paper press and the detecting means presses the uppermost sheet of the sheet-like paper on the loading table. The position, pressing force, and / or contact area are set within a predetermined range.
【００１５】即ち、本発明の更に他の局面に従えば、上
記第二の技術的課題を解決するための給紙装置として、
複数枚のシート状紙が積載される、昇降動自在に装着さ
れた積載台を含むシート状紙収容手段と、該積載台上に
積載された複数枚のシート状紙の上部前端に送風する紙
浮上及び分離手段、該積載台上に積載された複数枚のシ
ート状紙のうちの最上位の紙を吸引して送出するための
吸引送出手段と、支持部材、該積載台に向かう方向およ
びこれから離れる方向に所定範囲に渡って移動自在に該
支持部材に装着された押圧部材及び該押圧部材の位置を
検出するための検出器を含む紙押え及び検出手段とを具
備する給紙装置において、該シート状紙収容手段の該積
載台上には、寸法が異なった複数種のシート状紙が選択
的に載置され、複数種のシート状紙のいずれが該積載台
上に載置される場合も前縁が所定位置に整合せしめら
れ、該紙押え及び検出手段の該支持部材は、該積載台上
のシート状紙の送出方向における位置が調節自在であ
る、ことを特徴とする給紙装置が提供される。That is, according to still another aspect of the present invention, as a sheet feeding device for solving the second technical problem,
Sheet-shaped paper storage means including a stacking table movably mounted thereon, on which a plurality of sheet-shaped papers are stacked, and paper blowing to the upper front end of the plurality of sheet-shaped papers stacked on the stacking table Floating and separating means, suction sending means for sucking and sending the topmost sheet of the plurality of sheet-like sheets stacked on the loading table, and a support member, a direction toward the loading table and from there. A paper feeder comprising: a pressing member movably attached to the supporting member in a direction away from the supporting member; and a paper presser and a detecting unit including a detector for detecting a position of the pressing member. When a plurality of types of sheet-shaped papers having different dimensions are selectively placed on the loading table of the sheet-shaped paper storing means, and any of the plurality of types of sheet-shaped papers is loaded on the loading table. The front edge is also aligned with the predetermined position, and The support member means, located in the delivery direction of the sheet-like paper on the stacking table is adjustable, sheet feeding apparatus according to claim is provided that.
【００１６】好適実施形態においては、該紙押え及び検
出手段は、該積載台上のシート状紙の送出方向及びその
逆方向に該支持部材を移動せしめるための電動モータを
含んでいる。該電動モータは、該積載台上のシート状紙
の送出方向及びその逆方向に延びる雄ねじ軸、及び該雄
ねじ軸に螺着された雌ねじブロックを介して、該支持部
材に駆動連結されている。In a preferred embodiment, the paper holding and detecting means includes an electric motor for moving the supporting member in a direction in which the sheet-like paper is sent out on the loading table and in the opposite direction. The electric motor is drivingly connected to the support member via a male screw shaft extending in a direction in which the sheet-like paper is sent out on the loading table and in a direction opposite thereto, and a female screw block screwed to the male screw shaft.
【００１７】また、本発明の更に他の局面に従えば、複
数枚のシート状紙が積載される、昇降動自在に装着され
た積載台を含むシート状紙収容手段と、該積載台上に積
載された複数枚のシート状紙の上部前端に送風する紙浮
上及び分離手段、該積載台上に積載された複数枚のシー
ト状紙のうちの最上位の紙を吸引して送出するための吸
引送出手段と、支持部材、該積載台に向かう方向および
これから離れる方向に所定範囲に渡って移動自在に該支
持部材に装着された押圧部材及び該押圧部材の位置を検
出するための検出器を含む紙押え及び検出手段とを具備
する給紙装置において、該紙押え及び検出手段の該押圧
部材は、１０乃至８０ｇの圧力で該積載台上のシート状
紙の最上位の紙に押圧せしめられ、及び／又は該紙押え
及び検出手段の該押圧部材の下端と該積載台上のシート
状紙の最上位の紙との接触面積は１００ｍｍ２ 以下で
あり、及び／又は該紙押え及び検出手段の該押圧部材
は、該積載台上からの紙の送出方向に見て紙の後縁から
５０ｍｍ以内の位置で、該積載台上の最上位の紙に押圧
せしめられる、ことを特徴とする給紙装置が提供され
る。According to still another aspect of the present invention, a sheet-like paper accommodating means including a loading table on which a plurality of sheet-like papers are loaded and which is mounted to be movable up and down, and on the loading table. Paper floating and separating means for blowing air to the upper front end of a plurality of stacked sheets of paper, for sucking and sending out the topmost sheet of the plurality of sheets of paper stacked on the loading table. A suction sending means, a supporting member, a pressing member movably mounted on the supporting member in a direction toward and away from the loading table over a predetermined range, and a detector for detecting a position of the pressing member. In the paper feeder provided with the paper holding and detecting means, the pressing member of the paper holding and detecting means is pressed by the pressure of 10 to 80 g against the uppermost sheet of the sheet-like paper on the loading table. And / or the paper presser and the detector The contact area between the lower end of the pressure member and the uppermost sheet of the sheet-like paper on the loading table is 100 mm2 or less, and / or the pressing member of the paper presser and the detecting unit is configured to control the paper from the loading table. The paper feeder is characterized in that the paper is pressed against the uppermost paper on the loading table at a position within 50 mm from the trailing edge of the paper when viewed in the feeding direction.
【００１８】好ましくは、該紙押え及び検出手段の該押
圧部材は、２０乃至６０ｇの圧力で該積載台上のシート
状紙の最上位の紙に押圧せしめられる。該シート状紙押
圧及び検出手段は、該押圧部材を該積載台に向けて弾性
的に偏倚する弾性押圧手段を含むのが好都合である。該
紙押え及び検出手段の該押圧部材の下端は略半球形状で
あるのが好ましい。該紙押え及び検出手段の該押圧部材
は、該積載台上からの紙の送出方向に見て紙の後縁から
３０ｍｍ以内の位置で、該積載台上の最上位の紙に押圧
せしめられるのが好適である。Preferably, the pressing member of the paper pressing and detecting means is pressed against the uppermost sheet of the sheet-like paper on the loading table with a pressure of 20 to 60 g. Conveniently, the sheet-like paper pressing and detecting means includes elastic pressing means for elastically biasing the pressing member toward the loading table. It is preferable that the lower end of the pressing member of the paper pressing and detecting means has a substantially hemispherical shape. The pressing member of the paper holding and detecting means is pressed against the uppermost paper on the loading table at a position within 30 mm from the trailing edge of the paper when viewed in the paper feeding direction from the loading table. Is preferred.
【００１９】[0019]
【発明の実施の形態】以下、本発明に従って構成された
給紙装置の好適実施形態を図示している添付図面を参照
して、更に詳細に説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sheet feeder constructed in accordance with the present invention.
【００２０】図１及び図２には、本発明に従って構成さ
れた給紙装置の好適実施形態の主要構成要素が簡略に図
示されている。複写機、印刷機及びファクシミリの如き
画像形成機のハウジング（図示していない）内に装備さ
れる図示の給紙装置は、全体を番号２で示すシート状紙
収容手段を具備している。このシート状紙収容手段２は
上面が開放された箱形状である可動枠体４を含んでい
る。可動枠体４は適宜の装着手段を介して前後方向（図
１において紙面に垂直な方向、図２において左右方向）
に実質上水平に移動自在に装着されており、図１及び図
２に図示する作用位置とかかる作用位置から前方（図２
において右方）に引き出された非作用位置とに選択的に
位置付けることができる。可動枠体４内には実質上水平
に延在する矩形平板でよい積載台６が適宜の装着手段
（図示していない）を介して昇降動自在に装着されてい
る。積載台６には適宜の伝動手段（図示していない）を
介して電動モータでよい昇降動手段（図示していない）
が接続されており、かかる昇降動手段の作動によって積
載台６が昇降動せしめられる。可動枠体２が上記非作用
位置に引き出されて積載台６上に複数枚のシート状紙８
が積載され、しかる後に可動枠体４が図１及び図２に図
示する作用位置に移動せしめられる。後に更に言及する
如く、初期設定時においては積載台６はその上に積載さ
れた紙８の最上位の紙８が図１に符号Ｐ１で示す高さに
なる位置まで上昇せしめられる。積載台６上に積載され
た紙８の相当枚数が積載台６上から送出されて、最上位
の紙８の位置が図１に符号Ｐ０で示す高さ以下になる
と、積載台６が所定距離だけ上昇せしめられて、最上位
の紙８の位置が図１に符号Ｐ１で示す高さにせしめられ
る。従って、積載台６上の積載された紙８の最上位の紙
８の位置は上記高さＰ１とＰ０との間に維持される。図
１に明確に図示する如く、可動枠体２の片端壁１０（即
ちシート状紙の搬送方向に見て下流端、図１において右
端に配置された端壁１０）は、上記高さＰ０よりも幾分
低くせしめられており、従って積載台６上に積載された
シート状紙８の上部前端縁は、可動枠体４の片端壁１０
に遮られることなく下流側（図１において右側）に露呈
せしめられている。FIGS. 1 and 2 schematically show the main components of a preferred embodiment of a sheet feeding apparatus constructed according to the present invention. The illustrated paper feeder provided in a housing (not shown) of an image forming machine such as a copying machine, a printing machine, and a facsimile includes a sheet-shaped paper storage unit indicated by reference numeral 2 as a whole. The sheet-shaped paper accommodating means 2 includes a box-shaped movable frame 4 having an open upper surface. The movable frame 4 is moved in a front-rear direction (a direction perpendicular to the paper surface in FIG. 1 and a left-right direction in FIG. 2) via an appropriate mounting means.
1 and 2 is mounted so as to be movable horizontally, and the operation position shown in FIGS.
And the inoperative position extended to the right). A loading table 6, which may be a rectangular flat plate extending substantially horizontally, is mounted in the movable frame 4 via a suitable mounting means (not shown) so as to be able to move up and down. Elevating means (not shown) which may be an electric motor via an appropriate transmission means (not shown) on the loading table 6
Is connected, and the loading table 6 is moved up and down by the operation of the elevating means. The movable frame 2 is pulled out to the non-operating position, and a plurality of sheets 8
Are loaded, and then the movable frame 4 is moved to the operating position shown in FIGS. As will be further described later, at the time of the initial setting, the loading table 6 is raised to a position where the uppermost sheet 8 of the sheets 8 stacked thereon is at a height indicated by a symbol P1 in FIG. When the equivalent number of papers 8 loaded on the loading table 6 is sent out from the loading table 6 and the position of the uppermost paper 8 becomes lower than the height indicated by the symbol P0 in FIG. And the position of the topmost paper 8 is raised to the height indicated by reference numeral P1 in FIG. Accordingly, the position of the uppermost sheet 8 of the stacked sheets 8 on the stacking table 6 is maintained between the heights P1 and P0. As clearly shown in FIG. 1, one end wall 10 of the movable frame 2 (that is, the downstream end as viewed in the sheet conveying direction, the end wall 10 disposed at the right end in FIG. 1) is higher than the height P0. Is slightly lowered, so that the upper front edge of the sheet-like paper 8 stacked on the loading table 6 is in contact with one end wall 10 of the movable frame 4.
It is exposed to the downstream side (right side in FIG. 1) without being obstructed.
【００２１】主として図１を参照して説明を続けると、
図示の給紙装置は、全体を番号１２で示す紙浮上及び分
離手段、及び全体を番号１４で示す吸引送出手段も具備
している。紙浮上及び分離手段１２は、紙の送出方向に
対して垂直な方向、即ち紙の幅方向（画像形成機の前後
方向であり、図１において紙面に垂直な方向、図２にお
いて左右方向）に延在する送風ダクト１６を含んでお
り、かかる送風ダクト１６には浮上のための送風口１８
と分離のための送風口２０とが形成されている。送風ダ
クト１６には送風ファン（図示していない）が接続され
ており、送付ファンが作用せしめられると、図１に矢印
で示す如く送風口１８及び２０から空気が排出される。
吸引送出手段１４は、紙８の送出方向に間隔をおいて配
設された被駆動軸２６及び従動軸２８を含んでいる。被
駆動軸２６にはその軸線方向に間隔をおいて複数個（例
えば４個）の被駆動ローラ３０が固定され、同様に従動
軸２８にもその軸線方向に間隔をおいて複数個（例えば
４個）の従動ローラ３２が固定されている。被駆動ロー
ラ３０の各々と従動ローラ３２の各々とには、夫々、無
端ベルト３４が巻き掛けられている。無端ベルト３４の
各々には適宜の間隔をおいて多数の通気孔（図示してい
ない）が形成されている。被駆動軸２６は適宜の伝動手
段を介して電動モータ（図示していない）に駆動連結さ
れており、電動モータが付勢されると、無端ベルト３４
の各々は矢印３８で示す方向に回転駆動せしめられる。
上記被駆動軸２６と従動軸２８との間には、紙８の送出
方向に対して垂直な方向に延びる吸引ダクト４０が配設
されている。この吸引ダクト４０の下面には、無端ベル
ト３４の各々に対向して位置する複数個（例えば４個）
の吸引開口４２が形成されている。吸引ダクト４０には
吸引ファン（図示していない）が接続されており、吸引
ファンが作用せしめられると、無端ベルト３４の各々の
通気孔及び吸引ダクト４０の吸引開口４２の各々を通し
て空気が吸引される。Continuing the description mainly with reference to FIG.
The illustrated paper feeder is also provided with a paper floating and separating unit generally indicated by reference numeral 12 and a suction sending unit generally indicated by reference numeral 14. The paper floating and separating means 12 is arranged in a direction perpendicular to the paper feeding direction, that is, in the width direction of the paper (the front-rear direction of the image forming machine; It includes an extending air duct 16, which has an air outlet 18 for floating.
And an air outlet 20 for separation. A blower fan (not shown) is connected to the blower duct 16, and when the blower fan is operated, air is discharged from the blower openings 18 and 20 as indicated by arrows in FIG.
The suction and delivery means 14 includes a driven shaft 26 and a driven shaft 28 which are arranged at intervals in the paper 8 delivery direction. A plurality of (for example, four) driven rollers 30 are fixed to the driven shaft 26 at intervals in the axial direction, and a plurality of (for example, 4) rollers are also provided at the driven shaft 28 at intervals in the axial direction. ) Driven rollers 32 are fixed. An endless belt 34 is wound around each of the driven rollers 30 and each of the driven rollers 32. A large number of ventilation holes (not shown) are formed on each of the endless belts 34 at appropriate intervals. The driven shaft 26 is drivingly connected to an electric motor (not shown) via an appropriate transmission means. When the electric motor is energized, the endless belt 34 is driven.
Are driven to rotate in the direction indicated by the arrow 38.
Between the driven shaft 26 and the driven shaft 28, a suction duct 40 extending in a direction perpendicular to the paper 8 feeding direction is provided. On the lower surface of the suction duct 40, a plurality (for example, four) located opposite to each of the endless belts 34 is provided.
Are formed. A suction fan (not shown) is connected to the suction duct 40, and when the suction fan is operated, air is sucked through each ventilation hole of the endless belt 34 and each of the suction openings 42 of the suction duct 40. You.
【００２２】シート状紙収容手段２から紙８を１枚づつ
送出する際には、紙浮上及び分離手段１２においては、
送風ダクト１６の送風口１８及び２０から空気が排出さ
れる。送風口１８から排出される空気は、主として、積
載台６上に積載されている複数枚の紙８のうちの上部の
数枚の前部に向けて流動せしめられ、上部の数枚の紙８
の前部を上方に浮上せしめ、最上位の紙８を無端ベルト
３４に吸引せしめる。送風口２０から排出される空気
は、無端ベルト３４に吸引された最上位の紙８とその直
ぐ下方の紙８との間に流動せしめられ、最上位の紙８と
その直ぐ下方の紙８とを分離する。一方、吸引送出手段
１４においては無端ベルト３４の通気孔及び吸引開口４
２を通して空気が吸引され、これによって無端ベルト３
４の下方走行部の下面に、積載台６上から浮上せしめら
れた最上位の紙８が吸引される。そして、かかる紙８が
無端ベルト３４の矢印３８で示す方向への回転に応じて
図１において右方及び上方に送出され、案内板４４及び
４６間を通して搬送ローラ４８及び５０に供給される。
而して、紙浮上及び分離手段１２及び吸引送出手段１４
自体の構成は、本発明に従って構成された給紙装置の新
規な特徴をなすものではなく、それ故にこれらの構成の
詳細については、本明細書では説明を省略する。When the paper 8 is sent out one by one from the sheet-like paper storage means 2, the paper floating and separating means 12
Air is discharged from the air outlets 18 and 20 of the air duct 16. The air discharged from the blowing port 18 is mainly caused to flow toward the upper front part of the plurality of paper sheets 8 stacked on the loading table 6, and the upper several paper sheets 8.
Is lifted upward, and the topmost paper 8 is sucked by the endless belt 34. The air discharged from the air outlet 20 is caused to flow between the uppermost paper 8 sucked by the endless belt 34 and the paper 8 immediately below the uppermost paper 8, and the uppermost paper 8 and the paper 8 immediately below the uppermost paper 8. Is separated. On the other hand, in the suction sending means 14, the ventilation holes and suction openings 4 of the endless belt 34 are provided.
Air is sucked through the endless belt 3
The uppermost sheet 8 floated from the loading table 6 is sucked to the lower surface of the lower traveling portion 4. The paper 8 is sent rightward and upward in FIG. 1 in response to the rotation of the endless belt 34 in the direction indicated by the arrow 38, and is supplied to the conveying rollers 48 and 50 through the space between the guide plates 44 and 46.
Thus, the paper floating / separating means 12 and the suction / delivery means 14
The configuration itself does not constitute a novel feature of a paper feeder configured according to the present invention, and therefore details of these configurations will not be described herein.
【００２３】給紙装置には、更に、全体を番号５２で示
す紙押え及び検出手段も配設されている。図１及び図２
と共に図３を参照して説明すると、図示の実施形態にお
いては、画像形成機のハウジング（図示していない）の
後部には、直立基壁５４が配設されている。そして、こ
の基壁５４には図３において上下方向に間隔をおいて一
対のブラケット５６及び５８が固定されている。基壁５
４から延出するブラケット５６及び５８には、案内軸６
０が固定されていると共に雄ねじ軸６２が回転自在に装
着されている。案内軸６０と雄ねじ軸６２は実質上水平
に且つ相互に平行に延びている。雄ねじ軸６２には雄ね
じ６４が形成されている。紙押え及び検出手段５２は可
動部材６６を含んでおり、この可動部材６６は両側壁６
８及び７０並びに後壁７２を有する。案内軸６０は可動
部材６６の両側壁６８及び７０を貫通して延びており、
可動部材６６は案内軸６０に沿って移動自在に、従って
シート状紙８の送出方向に移動自在に、案内軸６０に装
着されている。可動部材６６の両側壁６８及び７０の各
々には雌ねじブロック７２及び７４が固定されており、
これらの雌ねじブロック７２及び７４にはシート状紙８
の送出方向に延びる雌ねじ孔が形成されている。上記雄
ねじ軸６２は雌ねじブロック７２及び７４を通って延在
せしめられており、その雄ねじ６４が雌ねじブロック７
２及び７４の雌ねじ孔に螺合せしめられている。雄ねじ
軸６２は適宜の伝動手段を介してパスルモータであるの
が好都合である電動モータ７６に駆動連結されている。
電動モータ７６が付勢されて雄ねじ軸６２が回転せしめ
られると、可動部材６６が案内軸６０及び雄ねじ軸６２
に沿って移動せしめられる。可動部材６６の側壁６８に
は、図３において下方に突出せしめられた被検出片７８
が一体に形成されている。一方、上記ブラケット５６に
は発光素子と受光素子とから構成された光学式検出器８
０が固定されている。図３に明確に図示する如く、可動
部材６６が図３に実線で示す基準位置に位置せしめられ
ている時には、被検出片７８が光学式検出器８０の両素
子間に位置し、これによって可動部材６６が基準位置に
位置せしめられていることが検出される。The paper feeder is further provided with a paper pressing and detecting means, generally indicated by reference numeral 52. 1 and 2
Referring to FIG. 3, an upright base wall 54 is provided at the rear of the housing (not shown) of the image forming apparatus. A pair of brackets 56 and 58 are fixed to the base wall 54 at intervals in the vertical direction in FIG. Base wall 5
The brackets 56 and 58 extending from
0 is fixed and the male screw shaft 62 is rotatably mounted. The guide shaft 60 and the male screw shaft 62 extend substantially horizontally and mutually parallel. A male screw 64 is formed on the male screw shaft 62. The paper holding and detecting means 52 includes a movable member 66, and the movable member 66
8 and 70 and a rear wall 72. The guide shaft 60 extends through both side walls 68 and 70 of the movable member 66,
The movable member 66 is mounted on the guide shaft 60 so as to be movable along the guide shaft 60, and thus movable in the feeding direction of the sheet-shaped paper 8. Female screw blocks 72 and 74 are fixed to both side walls 68 and 70 of the movable member 66, respectively.
These female screw blocks 72 and 74 have a sheet of paper 8
A female screw hole extending in the feeding direction is formed. The male screw shaft 62 extends through the female screw blocks 72 and 74, and the male screw 64 of the male screw shaft 62 is
2 and 74 are screwed into the female screw holes. The male screw shaft 62 is drivingly connected via suitable transmission means to an electric motor 76, which is conveniently a pulse motor.
When the electric motor 76 is energized and the male screw shaft 62 is rotated, the movable member 66 moves to the guide shaft 60 and the male screw shaft 62.
Is moved along. On the side wall 68 of the movable member 66, a detected piece 78 projected downward in FIG.
Are integrally formed. On the other hand, the bracket 56 has an optical detector 8 composed of a light emitting element and a light receiving element.
0 is fixed. As is clearly shown in FIG. 3, when the movable member 66 is located at the reference position shown by the solid line in FIG. 3, the detected piece 78 is located between the two elements of the optical detector 80, whereby the movable member is movable. It is detected that the member 66 is located at the reference position.
【００２４】図２及び図３を参照して説明を続けると、
上記可動部材６６には支持部材８２が装着されている。
図示の支持部材８２は金属薄板に切断加工、曲げ加工等
の機械加工を加えることによって形成されており、シー
ト状紙８の幅方向、図３において左右方向、に延在する
帯状壁８４を有する。支持部材８２には帯状壁８４の両
側縁から実質上鉛直に上方に延びる両側壁８６及び８８
も形成されており、かかる両側壁８６及び８８の後端部
は可動部材６６の両側壁６８及び７０間に配置され、上
記案内軸６０に旋回自在に装着されている。支持部材８
２にはその帯状壁８４の後端から下方に垂下する垂下壁
９２が形成されており、一方可動部材６６の後壁７２は
両側壁６８及び７０の下縁を越えて下方に延出せしめら
れており、相互に対向する垂下壁９２と後壁７２との間
には圧縮コイルばねでよい弾性偏倚手段９４が介在せし
められている。図２に明確に図示する如く、支持部材８
２の垂下壁９２に関連せしめて、上記シート状紙収容手
段２における可動枠体４の後面には、実質上水平に後方
に突出する当接片９６が配設されている。可動枠体４が
図２に図示する作用位置に移動せしめられると、当接片
９６が支持部材８２の垂下壁９２に当接せしめられ、弾
性偏倚手段９４の弾性偏倚作用に抗して支持部材８２を
図２に実線で示す押圧及び検出位置に移動せしめる。支
持部材８２が押圧及び検出位置に位置せしめられている
時には、その帯状壁８４は実質上水平に延在せしめられ
ている。シート状紙収容手段２の可動枠体４が図２にお
いて右方に移動せしめられ、当接片９６が支持部材８２
の垂下壁９２から離隔せしめられると、弾性偏倚手段９
４の弾性偏倚作用によって支持部材８２は図２に二点鎖
線で示す離隔位置に移動せしめられる。Continuing the description with reference to FIGS. 2 and 3,
A support member 82 is mounted on the movable member 66.
The illustrated support member 82 is formed by subjecting a thin metal plate to machining such as cutting and bending, and has a band-shaped wall 84 extending in the width direction of the sheet-shaped paper 8, that is, in the left-right direction in FIG. 3. . The support member 82 has two side walls 86 and 88 extending substantially vertically upward from both side edges of the strip-shaped wall 84.
The rear ends of the side walls 86 and 88 are disposed between the side walls 68 and 70 of the movable member 66, and are pivotally mounted on the guide shaft 60. Support member 8
2 has a hanging wall 92 hanging downward from the rear end of the band-shaped wall 84, while the rear wall 72 of the movable member 66 extends downward beyond the lower edges of the side walls 68 and 70. An elastic biasing means 94, which may be a compression coil spring, is interposed between the hanging wall 92 and the rear wall 72 facing each other. As clearly shown in FIG.
In relation to the second hanging wall 92, a contact piece 96 is provided on the rear surface of the movable frame 4 in the sheet-shaped paper accommodating means 2 to project substantially horizontally rearward. When the movable frame 4 is moved to the operation position shown in FIG. 2, the contact piece 96 is brought into contact with the hanging wall 92 of the support member 82, and the supporting member 96 is opposed to the elastic biasing action of the elastic biasing means 94. 82 is moved to the pressing and detecting position indicated by the solid line in FIG. When the support member 82 is located at the pressing and detecting position, the strip wall 84 extends substantially horizontally. The movable frame 4 of the sheet-shaped paper accommodating means 2 is moved rightward in FIG.
When separated from the hanging wall 92, the elastic biasing means 9
The support member 82 is moved to the separated position shown by the two-dot chain line in FIG.
【００２５】図１乃至図３を参照して説明すると、支持
部材８２の帯状壁８４の前縁には装着手段が配設されて
おり、かかる装着手段に押圧部材９８が装着されてい
る。装着手段は帯状壁８４の前縁から上方に延びる直立
壁１００、この直立壁１００の片側縁から前方に延びる
側壁１０２及びこの側壁１０２の上縁から水平に延びる
上壁１０４を有する。直立壁１００の下半部には案内ブ
ロック１０６が固定されている。この案内ブロック１０
６には貫通案内孔が形成されている。案内孔の断面形状
は円形でよい。案内ブロック１０６の案内孔に整合せし
めて上壁１０４にも円形穴が形成されている。図示の実
施形態における押圧部材９８は上壁１０４の孔と案内ブ
ロック１０６の案内孔に挿通せしめられた丸棒部材から
形成されている。押圧部材９８の下端は半球状であるの
が好都合である（その理由については後述する）。押圧
部材９８の中間部には案内ブロック１０６の案内孔の内
径よりの大きな外径を有するフランジ１０８が形成され
ている。押圧部材９８の上部には圧縮コイルばねでよい
弾性押圧手段１１０が被嵌されている。かかる弾性押圧
手段１１０は上壁１０４とフランジ１０８との間に介在
せしめられており、押圧部材９８を下方に弾性的に偏倚
する。押圧部材９８の下方への移動はそのフランジ１０
８が案内ブロック１０６の上面に当接することによって
制限される。押圧部材９８のフランジ１０８には図１に
おいて左方に図３において下方に延びる被検出片１１２
が付設されている。一方、装着手段の側壁１０２の内面
には、発光素子と受光素子とから構成された光学的検出
器１１４が固定されている。後に更に言及する如く、押
圧部材９８が上下動せしめられる際には被検出片１１２
が検出器１１４の発光素子と受光素子との間を通過せし
められる。Referring to FIGS. 1 to 3, a mounting means is provided on the front edge of the strip-shaped wall 84 of the support member 82, and a pressing member 98 is mounted on the mounting means. The mounting means has an upright wall 100 extending upward from the front edge of the strip-shaped wall 84, a side wall 102 extending forward from one edge of the upright wall 100, and an upper wall 104 extending horizontally from the upper edge of the side wall 102. A guide block 106 is fixed to the lower half of the upright wall 100. This guide block 10
6 is provided with a through guide hole. The cross-sectional shape of the guide hole may be circular. A circular hole is also formed in the upper wall 104 in alignment with the guide hole of the guide block 106. The pressing member 98 in the illustrated embodiment is formed of a round bar member inserted through the hole of the upper wall 104 and the guide hole of the guide block 106. The lower end of the pressing member 98 is advantageously semi-spherical (the reason for which will be described later). A flange 108 having an outer diameter larger than the inner diameter of the guide hole of the guide block 106 is formed at an intermediate portion of the pressing member 98. An elastic pressing means 110, which may be a compression coil spring, is fitted over the pressing member 98. The elastic pressing means 110 is interposed between the upper wall 104 and the flange 108 and elastically biases the pressing member 98 downward. The downward movement of the pressing member 98 is caused by its flange 10
8 is limited by contact with the upper surface of the guide block 106. A detection piece 112 extending leftward in FIG. 1 and downward in FIG. 3 is provided on the flange 108 of the pressing member 98.
Is attached. On the other hand, an optical detector 114 composed of a light emitting element and a light receiving element is fixed to the inner surface of the side wall 102 of the mounting means. As will be further described later, when the pressing member 98 is moved up and down, the detected piece 112
Is passed between the light emitting element and the light receiving element of the detector 114.
【００２６】図１乃至図３を参照して説明を続けると、
図示の実施形態においては、シート状紙収容手段２の積
載台６上に複数枚のシート状紙８を積載する際には、紙
８の寸法にかかわらず、紙８の前縁を積載台６の所定位
置に整合せしめて且つ紙８の幅方向中心を積載台６の所
定位置に整合せしめて、積載台６上に紙８が積載され
る。図１及び図２には、積載台６上にＪＩＳ規格Ａ４寸
法の紙８を所謂横配置で、即ち紙８自体の長手方向が紙
８の送出方向に対して垂直になる（図１において紙面に
垂直な方向、図２において左右方向になる）ように積載
した状態が図示されている。積載台６上に複数枚の紙８
が積載された可動枠体４が非作用位置から作用位置に移
動せしめられる際には、紙押え及び検出手段５２の支持
部材８２は弾性偏倚手段９４の弾性偏倚作用によって図
２に二点鎖線で示す離隔位置にあり、積載台６上に積載
された複数枚のシート状紙８の移動が押圧部材９８によ
って干渉乃至阻害されることはない。可動枠体４が図１
及び図２に図示する作用位置まで移動せしめられると、
可動枠体４に配設された当接片９６が支持部材８２の垂
下壁９２に作用することによって、支持部材８２が図２
に二点鎖線で示す離隔位置から図１及び図２に実線で示
す押圧及び検出位置に旋回動せしめられる。この際、充
分な枚数のシート状紙８が積載台６上に積載されている
場合には、最上位の紙８は図１に符号Ｐ１で示す高さと
符号Ｐ０で示す高さとの間に位置し、押圧部材９８は弾
性押圧手段１１０の偏倚作用によって最上位の紙８に押
圧せしめられる。最上位の紙８が符号Ｐ０で示す位置よ
りも下方である場合には、押圧部材９８に付設されてい
る被検出片１１２が検出器１１４の検出域よりも下方に
位置する。この場合には、被検出片１１２が検出器１１
４の検出域を通過してその上方になるまで（従って、検
出器１１４が被検出片１１２を一旦検出してから再び検
出しなくなるまで）、積載台６が上昇せしめられる。か
くすると、積載台６上の最上位の紙８は図１に符号Ｐ１
で示す高さに位置付けられる。積載台６から相当数の紙
８が送出されて、最上位の紙８が図１に符号Ｐ０で示す
位置になると、押圧部材９８の被検出片１１２が検出器
１１４の検出域を通過してその下方になる。かくする
と、積載台６の最上位の紙８が図１に符号Ｐ１で示す高
さになるまで再び積載台６が上昇せしめられる。図２を
参照することによって理解されるとおり、シート状紙収
容手段２の可動枠体４が作用位置に位置せしめられ、紙
押え及び検出手段５２の支持部材８２が押圧及び検出位
置に位置せしめられると、押圧部材９８は紙８の幅方
向、即ち送出方向に対して垂直な方向（従って図２にお
いて左右方向）において紙８の中心にて、積載台６上の
最上位の紙８に押圧せしめられる。上述した如く、異な
った寸法のシート状紙８が積載台６上に積載される場合
も、常に紙８の中心は所定位置に整合せしめられるの
で、押圧部材９８は紙８の幅方向中心にて紙８に押圧せ
しめられる。Continuing the description with reference to FIGS. 1 to 3,
In the illustrated embodiment, when stacking a plurality of sheets of paper 8 on the loading table 6 of the sheet-like paper storage means 2, regardless of the size of the paper 8, the leading edge of the paper 8 is attached to the loading table 6. The paper 8 is stacked on the loading table 6 by aligning the center of the paper 8 in the width direction with the predetermined position of the loading table 6. 1 and 2, the paper 8 of JIS A4 size is arranged in a so-called horizontal arrangement on the loading table 6, that is, the longitudinal direction of the paper 8 itself is perpendicular to the sending direction of the paper 8 (in FIG. (In the direction perpendicular to FIG. 2, the horizontal direction in FIG. 2). Plural sheets of paper 8 on loading table 6
When the movable frame 4 on which the sheet is loaded is moved from the non-operation position to the operation position, the support member 82 of the paper pressing and detecting means 52 is moved by the two-dot chain line in FIG. The movement of the plurality of sheet-like papers 8 at the separated positions shown and stacked on the stacking table 6 is not interfered or hindered by the pressing member 98. The movable frame 4 is shown in FIG.
And when moved to the working position illustrated in FIG.
When the contact piece 96 provided on the movable frame 4 acts on the hanging wall 92 of the support member 82, the support member 82
1 and 2 from the separated position shown by the two-dot chain line to the pressing and detecting position shown by the solid line in FIGS. At this time, when a sufficient number of sheet-like papers 8 are stacked on the loading table 6, the uppermost paper 8 is positioned between the height indicated by the reference symbol P1 and the height indicated by the reference symbol P0 in FIG. Then, the pressing member 98 is pressed against the uppermost paper 8 by the biasing action of the elastic pressing means 110. When the uppermost sheet 8 is located below the position indicated by the reference symbol P0, the detection target 112 attached to the pressing member 98 is located below the detection area of the detector 114. In this case, the detection target 112 is the detector 11
The loading table 6 is raised until it passes through the detection area 4 and goes above it (thus, until the detector 114 detects the detection target 112 once and stops detecting it again). Thus, the uppermost paper 8 on the loading table 6 is indicated by the reference sign P1 in FIG.
It is positioned at the height indicated by. When a considerable number of papers 8 have been sent out from the loading table 6 and the topmost paper 8 has reached the position indicated by the symbol P0 in FIG. 1, the detected piece 112 of the pressing member 98 passes through the detection area of the detector 114. Below it. Thus, the loading table 6 is raised again until the topmost sheet 8 of the loading table 6 reaches the height indicated by the reference numeral P1 in FIG. As can be understood by referring to FIG. 2, the movable frame 4 of the sheet-shaped paper accommodating means 2 is positioned at the operation position, and the support member 82 of the paper holding and detecting means 52 is positioned at the pressing and detecting position. The pressing member 98 presses the uppermost paper 8 on the loading table 6 at the center of the paper 8 in the width direction of the paper 8, that is, in the direction perpendicular to the feeding direction (therefore, the horizontal direction in FIG. 2). Can be As described above, even when sheets 8 of different sizes are stacked on the stacking table 6, the center of the sheet 8 is always aligned with a predetermined position. The paper 8 is pressed.
【００２７】而して、本発明者等の経験によれば、所要
のとおりの良好な給紙を安定して遂行し得るようになす
ためには、（１）積載台６上の最上位の紙８に対する押
圧部材９８の押圧力、（２）積載台６上の最上位の紙８
と押圧部材９８の下端との接触面積、及び（３）積載台
６上の最上位の紙８の後縁から押圧部材９８の下端が接
触する位置までの、紙送出方向における長さが重要であ
ることが判明した。According to the experience of the present inventors, in order to stably perform the required excellent sheet feeding, (1) the uppermost sheet on the loading table 6 The pressing force of the pressing member 98 against the paper 8; (2) the uppermost paper 8 on the loading table 6;
(3) the length in the paper feeding direction from the trailing edge of the uppermost paper 8 on the loading table 6 to the position where the lower end of the pressing member 98 contacts is important. It turned out to be.
【００２８】最初に押圧力について言及すると、本発明
者等の経験によれば、積載台６上の最上位の紙８に対す
る押圧部材９８の押圧力は１０乃至８０ｇ、特に２０乃
至６０ｇであるのが好適である。押圧力が過剰に小さい
と、上記紙浮上及び分離手段１２及び吸引送出手段１４
が作動せしめられた際に、上から２枚面の紙８或いはこ
れに加えてさらのその下方の数枚の紙８が後方に移動し
てしまう傾向が発生する。一方、押圧力が過剰に大きく
なると、最上位の紙８と２枚目の紙８との間の接触が過
大になり、最上位の紙８と共に２枚目の紙８の送出され
てしまう重送が発生する、或いは過大な押圧力に起因し
て最上位の紙８の送出も阻止されてしまう給紙不良が発
生する傾向がある。First, referring to the pressing force, according to the experience of the present inventors, the pressing force of the pressing member 98 against the uppermost paper 8 on the loading table 6 is 10 to 80 g, particularly 20 to 60 g. Is preferred. If the pressing force is excessively small, the paper floating / separating means 12 and the suction / delivery means 14
Is activated, there is a tendency that the two sheets of paper 8 from the top or, in addition to this, a few sheets of paper 8 below it tend to move backward. On the other hand, if the pressing force becomes excessively large, the contact between the uppermost paper 8 and the second paper 8 becomes excessive, and the weight of the second paper 8 sent out together with the uppermost paper 8 is increased. There is a tendency that a feeding failure occurs, in which feeding occurs or feeding of the topmost paper 8 is prevented due to excessive pressing force.
【００２９】積載台６上の最上位の紙８と押圧部材９８
の下端との接触面積は可及的に小さいことが望ましく、
１００ｍｍ２ 以下であるのが好ましい。接触面積が過
大になる、特に紙８の幅方向における接触長さが長くな
ると、最上位の紙８と２枚目の紙８との間を流動して両
者を分離する空気流の流れが過剰に阻害され、これに起
因して最上位の紙８と共に２枚目の紙８も送出されてし
まう重送が発生する傾向がある。最上位の紙８と押圧部
材９８の下端との接触面積を可及的に小さくし、且つ押
圧部材９８の下端が接触することによる紙８の損傷を確
実に回避するためには、押圧部材９８の下端を略半球形
状にせしめるのが好適である。The uppermost sheet 8 on the loading table 6 and the pressing member 98
It is desirable that the contact area with the lower end of the
It is preferably 100 mm2 or less. If the contact area becomes excessively large, especially if the contact length in the width direction of the paper 8 becomes long, the flow of the air flow which flows between the uppermost paper 8 and the second paper 8 and separates them is excessive. This tends to cause a double feed in which the second sheet 8 is sent out together with the top sheet 8. In order to minimize the contact area between the uppermost paper 8 and the lower end of the pressing member 98 and to avoid the damage of the paper 8 due to the contact of the lower end of the pressing member 98, the pressing member 98 is required. It is preferable to make the lower end of the lens substantially hemispherical.
【００３０】更に、積載台６上の最上位の紙８の後端か
ら押圧部材９８の下端が接触する位置までの、紙８の搬
送方向における長さＬは５０ｍｍ以下、特に３０ｍｍ以
下であるのが好適である。上記長さＬが過剰に大きくな
ると、最上位の紙８と押圧部材９８の下端との接触位置
よりも後方における最上位の紙８と２枚目の紙との相互
接触長さが必然的に長くなり、それ故に最上位の紙８と
共に２枚目の紙８も送出されてしまう重送が発生する傾
向が発生する。既に言及した如く、図示の実施形態にお
いては、紙８の寸法にかかわらず紙８の前縁を積載台６
の所定位置に整合せしめて積載台６上に紙８が積載され
る。従って、紙８の送出方向寸法によって紙８の後縁の
位置が変化する。そこで、本発明に従って構成された給
紙装置においては、積載台６上の紙８の寸法に応じて、
押圧部材９８が装着されている支持部材８２の、紙８の
送出方向における位置を調節自在にせしめている。図示
の実施形態においては、電動モータ７６を作動せしめて
雄ねじ軸６２を回転せしめ、かくして支持部材８２が装
着されている可動部材６６を案内軸６０に沿って移動せ
しめて、押圧部材９８の位置を調節する。ＪＩＳ規格Ａ
４寸法の紙８を紙８自体の長手方向が積載台６の幅方向
（従って送出方向に対して垂直な方向）になるように積
載台６上に積載する場合には、押圧部材９８は図１及び
図３に実線で示す位置に位置せしめられるが、ＪＩＳ規
格Ｂ５寸法の紙８を紙８自体の長手方向が積載台６の幅
方向（従って送出方向に対して垂直な方向）になるよう
に積載台６上に積載する場合には、押圧部材９８は図１
及び図３に二点鎖線で示す位置まで移動せしめられる。
図示の実施形態においては、電動モータ７６を作動せし
めて可動部材６６を移動せしめ、押圧部材９８の位置を
自動的に調節せしめているが、所望ならば、例えば可動
部材６６を手動で所要位置まで移動せしめて、押圧部材
９８の位置を調節するようになすこともできる。Further, the length L in the transport direction of the paper 8 from the rear end of the uppermost paper 8 on the loading table 6 to the position where the lower end of the pressing member 98 comes into contact is 50 mm or less, particularly 30 mm or less. Is preferred. If the length L becomes excessively large, the mutual contact length between the uppermost paper 8 and the second paper behind the contact position between the uppermost paper 8 and the lower end of the pressing member 98 is inevitably increased. As a result, there is a tendency that double feed occurs in which the second sheet 8 is sent together with the top sheet 8. As already mentioned, in the illustrated embodiment, the leading edge of the paper 8 is connected to the loading table 6 regardless of the dimensions of the paper 8.
The paper 8 is stacked on the loading table 6 while being aligned with the predetermined position. Therefore, the position of the trailing edge of the paper 8 changes depending on the size of the paper 8 in the sending direction. Therefore, in the paper feeder configured according to the present invention, the size of the paper 8 on the
The position of the support member 82 on which the pressing member 98 is mounted in the paper 8 sending direction is adjustable. In the illustrated embodiment, the electric motor 76 is operated to rotate the male screw shaft 62, and thus the movable member 66 on which the support member 82 is mounted is moved along the guide shaft 60, and the position of the pressing member 98 is changed. Adjust. JIS standard A
When the paper 8 of four dimensions is loaded on the loading table 6 such that the longitudinal direction of the paper 8 itself is in the width direction of the loading table 6 (therefore, the direction perpendicular to the feeding direction), the pressing member 98 is not shown. 1 and 3, the paper 8 of the JIS standard B5 size is placed such that the longitudinal direction of the paper 8 itself is the width direction of the loading table 6 (therefore, the direction perpendicular to the sending direction). When loading on the loading table 6, the pressing member 98
And it is moved to the position shown by the two-dot chain line in FIG.
In the illustrated embodiment, the electric motor 76 is operated to move the movable member 66, and the position of the pressing member 98 is automatically adjusted. However, if desired, for example, the movable member 66 is manually moved to a required position. By moving it, the position of the pressing member 98 can be adjusted.
【００３１】図４は、積載台６上の最上位の紙８に対す
る押圧部材９８の押圧を選択的に解除するための押圧解
除手段１１６が配設されている変形実施形態を図示して
いる。この変形実施形態においては、紙押え及び検出手
段５２における支持部材８２は可動部材６６に固定され
ている（所望ならば、支持部材８２を可動部材６６と一
体に形成することもできる）。支持部材８２の先端部に
支持ブラケット１１８が固定されており、押圧解除手段
１１６は支持ブラケット１１８上に装着された電磁ソレ
ノイド１２０を含んでいる。支持ブラケット１１８には
支持ピン１２２が固定されており、この支持ピン１２２
にはリンク部材１２４が旋回自在に装着されている。リ
ンク部材１２４は第一のアーム１２６と第二のアーム１
２８とを有し、第一のアーム１２６は押圧部材９８のフ
ランジ１０８の下方まで延びており、第二のアーム１２
８は電磁ソレノイド１２０の出力ピン１３０に旋回自在
に連結されている。積載台６上の複数枚のシート状紙８
を積載して可動枠体４（図１及び図２）を作用位置に移
動せしめる際には、電磁ソレノイド１２０は除勢されて
いる。かかる状態においては、電磁ソレノイド１２０に
配設されているコイルばね１３２の弾性偏倚作用によっ
てリンク部材１２４は二点鎖線で示す押圧解除位置に偏
倚せしめられ、かかるリンク部材１２４の第一のアーム
１２６が押圧部材９８を弾性押圧手段１１０の弾性偏倚
作用に抗して二点鎖線で示す離隔位置に上昇せしめてお
り、押圧部材９８の下端は積載台６上の最上位の紙８の
最大高さよりも上方に離隔せしめられている。従って、
可動枠体４を作用位置まで移動せしめる際に、積載台６
上に積載されている紙８に押圧部材９８が干渉すること
はない。可動枠体４が作用位置まで移動せしめられる
と、適宜の検出器（図示していない）によってこれが検
出されて電磁ソレノイド１２０が付勢され、リンク部材
１２４は実線で示す位置に旋回せしめられる。かくする
と、リンク部材１２４の第一のアーム１２６は押圧部材
９８のフランジ１０８から下方に離隔する。かかる状態
においては、押圧解除手段１１６の解除作用が消失さ
れ、押圧部材９８は弾性押圧手段１１０の作用によって
下方に弾性偏倚され、押圧部材９８の下端が積載台６上
の最上位の紙８に押圧される。可動枠体４が作用位置か
ら非作用位置に引き出される際にも、例えば可動枠体４
を引き出すのに先立って画像形成機のハウジング（図示
していない）の前扉が開放されると、適宜の検出器（図
示していない）によってこれが検出され電磁ソレノイド
１２０を除勢され、従ってリンク部材１２４の第一のア
ーム１２６が押圧部材９８を上昇せしめ、積載台６上の
最上位の紙８から上方に離隔せしめる。それ故に、可動
枠体４を作用位置から非作用位置に引き出す際にも、積
載台６上の紙８が押圧部材９８に干渉されることがな
い。図示の変形実施形態においては、押圧部材９８を上
昇せしめて積載台６上の紙８から離隔せしめる時には電
磁ソレノイド１２０を除勢し、押圧部材９８を積載台６
上の紙８に押圧せしめる際には電磁ソレノイド１２０を
付勢しているが、所望ならば、押圧部材９８を上昇せし
めて積載台６上の紙８から離隔せしめる時には電磁ソレ
ノイド１２０を付勢し、押圧部材９８を積載台６上の紙
８に押圧せしめる際には電磁ソレノイド１２０を除勢す
るように構成することも可能であることは多言するまで
もない。FIG. 4 shows a modified embodiment in which a pressing release means 116 for selectively releasing the pressing of the pressing member 98 against the uppermost sheet 8 on the loading table 6 is provided. In this modified embodiment, the support member 82 of the paper holding and detecting means 52 is fixed to the movable member 66 (if desired, the support member 82 can be formed integrally with the movable member 66). A support bracket 118 is fixed to the distal end of the support member 82, and the pressing release means 116 includes an electromagnetic solenoid 120 mounted on the support bracket 118. A support pin 122 is fixed to the support bracket 118.
Is provided with a link member 124 so as to be pivotable. The link member 124 includes the first arm 126 and the second arm 1
28, the first arm 126 extends below the flange 108 of the pressing member 98, and the second arm 12
Reference numeral 8 is pivotally connected to an output pin 130 of the electromagnetic solenoid 120. Plural sheets of paper 8 on loading table 6
When the movable frame 4 (FIGS. 1 and 2) is moved to the operating position by loading the electromagnetic solenoid 120, the electromagnetic solenoid 120 is deenergized. In such a state, the link member 124 is biased to the pressing release position shown by the two-dot chain line by the elastic biasing action of the coil spring 132 provided in the electromagnetic solenoid 120, and the first arm 126 of the link member 124 is moved. The pressing member 98 is raised to the separated position shown by the two-dot chain line against the elastic biasing action of the elastic pressing means 110, and the lower end of the pressing member 98 is higher than the maximum height of the uppermost paper 8 on the loading table 6. It is separated upward. Therefore,
When moving the movable frame 4 to the operation position, the loading table 6
The pressing member 98 does not interfere with the paper 8 stacked thereon. When the movable frame 4 is moved to the operation position, this is detected by an appropriate detector (not shown), the electromagnetic solenoid 120 is energized, and the link member 124 is turned to the position shown by the solid line. Thus, the first arm 126 of the link member 124 is separated downward from the flange 108 of the pressing member 98. In such a state, the releasing action of the pressing release means 116 is lost, the pressing member 98 is elastically biased downward by the action of the elastic pressing means 110, and the lower end of the pressing member 98 is placed on the uppermost sheet 8 on the loading table 6. Pressed. When the movable frame 4 is pulled out from the operating position to the non-operating position, for example,
When the front door of the housing (not shown) of the image forming machine is opened prior to drawing out, the detector is detected by a suitable detector (not shown), and the electromagnetic solenoid 120 is de-energized. The first arm 126 of the member 124 raises the pressing member 98 and separates the pressing member 98 upward from the uppermost sheet 8 on the loading table 6. Therefore, even when the movable frame 4 is pulled out from the operation position to the non-operation position, the paper 8 on the loading table 6 is not interfered by the pressing member 98. In the illustrated modified embodiment, when the pressing member 98 is raised to separate from the paper 8 on the loading table 6, the electromagnetic solenoid 120 is deenergized and the pressing member 98 is moved to the loading table 6.
The electromagnetic solenoid 120 is energized when pressing the paper 8 on the upper side. However, if desired, the electromagnetic solenoid 120 is energized when the pressing member 98 is raised and separated from the paper 8 on the loading table 6. Needless to say, the electromagnetic solenoid 120 may be deenergized when the pressing member 98 is pressed against the paper 8 on the loading table 6.
【００３２】[0032]
【発明の効果】本発明の給紙装置においては、シート状
紙収容手段の可動枠体が作用位置から非作用位置に移動
せしめられる際、そしてまた非作用位置から作用位置に
移動せしめられる際には、押圧部材が自動的に上方に位
置せしめられ、積載台上に積載されているシート状紙に
押圧部材が干渉するこが確実に回避される。According to the paper feeding apparatus of the present invention, when the movable frame of the sheet-shaped paper accommodating means is moved from the working position to the non-working position and also from the non-working position to the working position. In this configuration, the pressing member is automatically positioned at the upper side, and it is possible to reliably prevent the pressing member from interfering with the sheet-like paper stacked on the stacking table.
【００３３】また、本発明の給紙装置においては、積載
台上から複数枚の紙が送出されてしまう重送、及び積載
台上から紙が送出されない給紙不良の発生が充分に防止
乃至抑制される。Further, in the paper feeding apparatus of the present invention, the occurrence of a double feeding in which a plurality of papers are sent out from the loading table and a paper feeding failure in which the papers are not sent out from the loading table are sufficiently prevented or suppressed. Is done.
【図１】本発明に従って構成された給紙装置の好適実施
形態を示す簡略断面図。FIG. 1 is a simplified cross-sectional view illustrating a preferred embodiment of a sheet feeding device configured according to the present invention.
【図２】図１の給紙装置の簡略横断面図。FIG. 2 is a simplified cross-sectional view of the sheet feeding device of FIG.
【図３】図１の給紙装置に配設されている紙押え及び検
出手段を示す部分平面図。FIG. 3 is a partial plan view showing a paper presser and a detector provided in the paper feeding device of FIG. 1;
【図４】紙押え及び検出手段の変形実施形態を示す部分
正面図。FIG. 4 is a partial front view showing a modified embodiment of the paper pressing and detecting means.
２：シート状紙収容手段 ４：可動枠体 ６：積載台 ８：シート状紙 １２：紙浮上及び分離手段 １４：吸引送出手段 ５２：紙押え及び検出手段 ６０：案内軸 ６２：雄ねじ軸 ６４：雄ねじ ６６：可動部材 ７２：雌ねじブロック ７４：雌ねじブロック ７６：電動モータ ７８：被検出片 ８０：検出器 ８２：支持部材 ９４：弾性偏倚手段 ９６：当接片 ９８：押圧部材 １１０：弾性押圧手段 １１２：被検出片 １１４：検出器 １１６：押圧解除手段 １２０：電磁ソレノイド 2: Sheet-shaped paper storing means 4: Movable frame 6: Loading table 8: Sheet-shaped paper 12: Paper floating and separating means 14: Suction sending means 52: Paper holding and detecting means 60: Guide shaft 62: Male screw shaft 64: Male screw 66: movable member 72: female screw block 74: female screw block 76: electric motor 78: detected piece 80: detector 82: support member 94: elastic biasing means 96: abutting piece 98: pressing member 110: elastic pressing means 112 : Detected piece 114: Detector 116: Press release means 120: Electromagnetic solenoid
───────────────────────────────────────────────────── フロントページの続き (72)発明者 淵 昌巳 大阪市中央区玉造１丁目２番28号 三田工 業株式会社内 (72)発明者 山本 清典 大阪市中央区玉造１丁目２番28号 三田工 業株式会社内 Ｆターム(参考） 3F048 AA02 AA04 AA05 BA01 BB02 CB12 DA01 DC02 EB02 3F343 FA02 FB02 FB03 FB05 FC01 GA01 GB01 GC01 GD01 HA17 HA27 HB04 HD16 JB05 JB27 JB28 JD28 KB05 KB20 LA14 LC11 LD10 LD11 MA02 MA13 MA14 MA32 MC17 MC23 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masami Fuchi 1-2-28 Tamazo, Chuo-ku, Osaka Mita Kogyo Co., Ltd. (72) Inventor Kiyonori Yamamoto 1-2-28 Tamazo, Chuo-ku, Osaka Mita F-term (reference) in Kogyo Co., Ltd.
Claims (23)
動自在に装着された積載台を含むシート状紙収容手段
と、該積載台上に積載された複数枚のシート状紙の上部
前端に送風する紙浮上及び分離手段、該積載台上に積載
された複数枚のシート状紙のうちの最上位の紙を吸引し
て送出するための吸引送出手段と、支持部材、該積載台
に向かう方向およびこれから離れる方向に所定範囲に渡
って移動自在に該支持部材に装着された押圧部材及び該
押圧部材の位置を検出するための検出器を含む紙押え及
び検出手段とを具備する給紙装置において、 該シート状紙収容手段は作用位置と該作用位置から引き
出された非作用位置との間を移動自在に装着された可動
枠体を含み、該積載台は該可動枠体に装着されており、 該紙押え及び検出手段の該支持部材は、押圧及び検出位
置と離隔位置との間を移動自在に装着されており、 該シート状紙収容手段の該可動枠体が該作用位置に移動
せしめられると、該紙押え及び検出手段の該支持部材が
該押圧及び検出位置に位置せしめられて、該押圧部材が
該積載台上に積載されたシート状紙の最上位の紙に押圧
せしめられ、 該シート状紙収容手段の該可動枠体が該作用位置から該
非作用位置に向けて移動される際には、該紙押え及び検
出手段の該支持部材が該押圧及び検出位置から該離隔位
置に移動せしめられて、該押圧部材が該積載台上に積載
されたシート状紙の最上位の紙から上方に離隔せしめら
れる、 ことを特徴とする給紙装置。1. A sheet-like paper storage means including a stacking table movably mounted on which a plurality of sheet-like sheets are stacked, and an upper part of the plurality of sheet-like sheets stacked on the loading table. Paper floating and separating means for blowing to the front end, suction and sending means for sucking and sending the uppermost sheet of a plurality of sheet-like paper sheets stacked on the loading table, a support member, and the loading table A presser member mounted on the support member movably over a predetermined range in a direction toward and away from the presser member, and a paper presser and a detection unit including a detector for detecting the position of the presser member. In the paper device, the sheet-shaped paper accommodating means includes a movable frame movably mounted between an operation position and a non-operation position pulled out from the operation position, and the loading table is mounted on the movable frame. And the support of the paper presser and the detection means. The material is mounted movably between a pressing and detecting position and a separating position, and when the movable frame of the sheet-shaped paper accommodating means is moved to the operating position, the material of the sheet pressing and detecting means is moved. The support member is positioned at the pressing and detecting position, and the pressing member is pressed against the uppermost sheet of the sheet-like paper stacked on the loading table, and the movable frame of the sheet-like paper accommodating means is provided. When the body is moved from the working position to the non-working position, the supporting member of the paper presser and the detecting means is moved from the pressing and detecting position to the separated position, and the pressing member is moved. A sheet feeding device, which is separated upward from the uppermost sheet of sheet-like sheets stacked on a stacking table.
離隔位置に弾性的に偏倚する弾性偏倚部材を含み、該シ
ート状紙収容手段の該可動枠体が該作用位置に移動せし
められると、該可動枠体が該支持部材に当接して該弾性
偏倚手段の弾性偏倚作用に抗して該支持部材を該押圧及
び検出位置に移動せしめる、請求項１記載の給紙装置。2. The paper holding and detecting means includes an elastic biasing member for elastically biasing the support member to the separated position, and the movable frame of the sheet-shaped paper receiving means is moved to the operating position. 2. The sheet feeding device according to claim 1, wherein the movable frame body abuts on the support member to move the support member to the pressing and detecting position against the elastic biasing action of the elastic biasing means.
作用位置から実質上水平に前方に引き出されて該非作用
位置に移動せしめられ、該可動枠体にはその後面から後
方に突出する当接片が配設されており、該シート状紙収
容手段の該可動枠体が該作用位置に移動せしめられる
と、該当接片が該支持部材に当接する、請求項２記載の
給紙装置。3. The paper feeding frame of the sheet-shaped paper accommodating means is pulled substantially horizontally forward from the working position and is moved to the non-working position. 3. The feeding device according to claim 2, wherein a projecting contact piece is provided, and when the movable frame of the sheet-shaped paper storage means is moved to the operation position, the contact piece comes into contact with the support member. Paper equipment.
押圧及び検出位置と該離隔位置との間を旋回動自在に装
着されている、請求項１から３までのいずれかに記載の
給紙装置。4. The paper holding and detecting means according to claim 1, wherein said support member of said paper pressing and detecting means is mounted so as to be pivotable between said pressing and detecting position and said separated position. Paper feeder.
動自在に装着された積載台を含むシート状紙収容手段
と、該積載台上に積載された複数枚のシート状紙の上部
前端に送風する紙浮上及び分離手段、該積載台上に積載
された複数枚のシート状紙のうちの最上位の紙を吸引し
て送出するための吸引送出手段と、支持部材、該積載台
に向かう方向およびこれから離れる方向に所定範囲に渡
って移動自在に該支持部材に装着された押圧部材及び該
押圧部材の位置を検出するための検出器を含む紙押え及
び検出手段とを具備する給紙装置において、 該シート状紙収容手段は作用位置と該作用位置から引き
出された非作用位置との間を移動自在に装着された可動
枠体を含み、該積載台は該可動枠体に装着されており、 該シート状紙押圧及び検出手段は、選択的に作用せしめ
られて該押圧部材を該積載台から離隔する方向に移動せ
しめるための押圧解除手段を含み、 該シート状紙収容手段の該可動枠体が該作用位置に移動
せしめられると、該押圧解除手段の解除作用が消失せし
められて、該押圧部材が該積載台上に積載されたシート
状紙の最上位の紙に押圧せしめられ、 該シート状紙収容手段の該可動枠体が該作用位置から該
非作用位置に向けて移動される際には、該押圧解除手段
の解除作用によって、該押圧部材が該積載台上に積載さ
れたシート状紙の最上位の紙から上方に離隔せしめられ
る、 ことを特徴とする給紙装置。5. A sheet-like paper storage means including a stacking table movably mounted on which a plurality of sheet-like sheets are stacked, and an upper portion of the plurality of sheet-like sheets stacked on the loading table. Paper floating and separating means for blowing to the front end, suction and sending means for sucking and sending the uppermost sheet of a plurality of sheet-like paper sheets stacked on the loading table, a support member, and the loading table A presser member mounted on the support member movably over a predetermined range in a direction toward and away from the presser member, and a paper presser and a detection unit including a detector for detecting the position of the presser member. In the paper device, the sheet-shaped paper accommodating means includes a movable frame movably mounted between an operation position and a non-operation position pulled out from the operation position, and the loading table is mounted on the movable frame. The sheet-shaped paper pressing and detecting means. And press release means for selectively acting to move the pressing member in a direction away from the loading table. When the movable frame of the sheet-like paper storage means is moved to the operation position. The releasing action of the pressing release means is lost, and the pressing member is pressed against the uppermost sheet of the sheet-like paper stacked on the loading table, and the movable frame of the sheet-like paper storing means is When the pressing member is moved from the working position toward the non-working position, the pressing member is released upward from the uppermost sheet of the sheet-like paper stacked on the stacking table by the releasing operation of the pressing release means. A sheet feeding device, which is separated from the sheet feeding device.
成されている、請求項５記載の給紙装置。6. The sheet feeding device according to claim 5, wherein said pressing release means is constituted by an electromagnetic solenoid.
動自在に装着された積載台を含むシート状紙収容手段
と、該積載台上に積載された複数枚のシート状紙の上部
前端に送風する紙浮上及び分離手段、該積載台上に積載
された複数枚のシート状紙のうちの最上位の紙を吸引し
て送出するための吸引送出手段と、支持部材、該積載台
に向かう方向およびこれから離れる方向に所定範囲に渡
って移動自在に該支持部材に装着された押圧部材及び該
押圧部材の位置を検出するための検出器を含む紙押え及
び検出手段とを具備する給紙装置において、 該シート状紙収容手段の該積載台上には、寸法が異なっ
た複数種のシート状紙が選択的に載置され、複数種のシ
ート状紙のいずれが該積載台上に載置される場合も前縁
が所定位置に整合せしめられ、 該紙押え及び検出手段の該支持部材は、該積載台上のシ
ート状紙の送出方向における位置が調節自在である、 ことを特徴とする給紙装置。7. A sheet-like paper storage means including a stacking table movably mounted on which a plurality of sheet-like sheets are stacked, and an upper part of the plurality of sheet-like papers stacked on the stacking table. Paper floating and separating means for blowing to the front end, suction and sending means for sucking and sending the uppermost sheet of a plurality of sheet-like paper sheets stacked on the loading table, a support member, and the loading table A presser member mounted on the support member movably over a predetermined range in a direction toward and away from the presser member, and a paper presser and a detection unit including a detector for detecting the position of the presser member. In the paper device, a plurality of types of sheet-shaped papers having different dimensions are selectively placed on the loading table of the sheet-shaped paper storage means, and any of the plurality of types of sheet-shaped papers is placed on the loading table. Also when placed, the leading edge is aligned with the predetermined position, The support member of the paper pressing and detection means includes a sheet feeding device located in the delivery direction of the sheet-like paper on the stacking table is adjustable, it is characterized.
シート状紙の送出方向及びその逆方向に該支持部材を移
動せしめるための電動モータを含んでいる、請求項７記
載の給紙装置。8. The feeding device according to claim 7, wherein said paper pressing and detecting means includes an electric motor for moving said supporting member in a direction in which the sheet-like paper is sent out on said loading table and in a direction opposite thereto. Paper equipment.
紙の送出方向及びその逆方向に延びる雄ねじ軸、及び該
雄ねじ軸に螺着された雌ねじブロックを介して、該支持
部材に駆動連結されている、請求項８記載の給紙装置。9. The electric motor is driven by the support member via a male screw shaft extending in the sheet feeding direction on the loading table and in the opposite direction, and a female screw block screwed to the male screw shaft. 9. The paper feeding device according to claim 8, wherein the paper feeding device is connected.
降動自在に装着された積載台を含むシート状紙収容手段
と、該積載台上に積載された複数枚のシート状紙の上部
前端に送風する紙浮上及び分離手段、該積載台上に積載
された複数枚のシート状紙のうちの最上位の紙を吸引し
て送出するための吸引送出手段と、支持部材、該積載台
に向かう方向およびこれから離れる方向に所定範囲に渡
って移動自在に該支持部材に装着された押圧部材及び該
押圧部材の位置を検出するための検出器を含む紙押え及
び検出手段とを具備する給紙装置において、 該紙押え及び検出手段の該押圧部材は、１０乃至８０ｇ
の圧力で該積載台上のシート状紙の最上位の紙に押圧せ
しめられる、 ことを特徴とする給紙装置。10. A sheet-like paper accommodation means including a loading table mounted on a plurality of sheets and movably mounted thereon, and an upper part of the plurality of sheet-like sheets loaded on the loading table. Paper floating and separating means for blowing to the front end, suction and sending means for sucking and sending the uppermost sheet of a plurality of sheet-like paper sheets stacked on the loading table, a support member, and the loading table A presser member mounted on the support member movably over a predetermined range in a direction toward and away from the presser member, and a paper presser and a detection unit including a detector for detecting the position of the presser member. In the paper device, the pressing member of the paper pressing and detecting means may have a weight of 10 to 80 g.
The sheet feeding device is pressed against the uppermost sheet of the sheet-like paper on the loading table by the pressure of the sheet feeding device.
は、２０乃至６０ｇの圧力で該積載台上のシート状紙の
最上位の紙に押圧せしめられる、請求項１０記載の給紙
装置。11. The paper feeding device according to claim 10, wherein said pressing member of said paper pressing and detecting means is pressed against the uppermost sheet of sheet-like paper on said loading table with a pressure of 20 to 60 g.
押圧部材を該積載台に向けて弾性的に偏倚する弾性押圧
手段を含む、請求項１０又は１１記載の給紙装置。12. The sheet feeding apparatus according to claim 10, wherein said sheet-shaped paper pressing and detecting means includes elastic pressing means for elastically biasing said pressing member toward said loading table.
下端と該積載台上のシート状紙の最上位の紙との接触面
積は１００ｍｍ２ 以下である、請求項１０から１２ま
でのいずれかに記載の給紙装置。13. The sheet holding and detecting means according to claim 10, wherein a contact area between a lower end of said pressing member and an uppermost sheet of sheet-like paper on said loading table is 100 mm 2 or less. A paper feeder according to claim 1.
下端は略半球形状である、請求項１３記載の給紙装置。14. The paper feeder according to claim 13, wherein a lower end of said pressing member of said paper presser and detector has a substantially hemispherical shape.
は、該積載台上からの紙の送出方向に見て紙の後縁から
５０ｍｍ以内の位置で、該積載台上の最上位の紙に押圧
せしめられる、請求項１０から１４のいずれかに記載の
給紙装置。15. The uppermost paper on the loading table at a position within 50 mm from the trailing edge of the paper when viewed in the direction in which the paper is sent out from the loading table. The sheet feeding device according to claim 10, wherein the sheet feeding device is pressed against the sheet feeding device.
は、該積載台上からの紙の送出方向に見て紙の後縁から
３０ｍｍ以内の位置で、該積載台上の最上位の紙に押圧
せしめられる、請求項１５記載の給紙装置。16. The uppermost sheet on the loading table at a position within 30 mm from the trailing edge of the sheet when viewed in the direction in which the sheet is sent out from the loading table. The sheet feeding device according to claim 15, wherein the sheet feeding device is pressed against the sheet feeding device.
降動自在に装着された積載台を含むシート状紙収容手段
と、該積載台上に積載された複数枚のシート状紙の上部
前端に送風する紙浮上及び分離手段、該積載台上に積載
された複数枚のシート状紙のうちの最上位の紙を吸引し
て送出するための吸引送出手段と、支持部材、該積載台
に向かう方向およびこれから離れる方向に所定範囲に渡
って移動自在に該支持部材に装着された押圧部材及び該
押圧部材の位置を検出するための検出器を含む紙押え及
び検出手段とを具備する給紙装置において、 該紙押え及び検出手段の該押圧部材の下端と該積載台上
のシート状紙の最上位の紙との接触面積は１００ｍｍ２
以下である、 ことを特徴とする給紙装置。17. A sheet-like paper storage means including a loading table on which a plurality of sheet-like sheets are stacked and movably mounted thereon, and an upper portion of the plurality of sheet-like sheets loaded on the loading table. Paper floating and separating means for blowing to the front end, suction and sending means for sucking and sending the uppermost sheet of a plurality of sheet-like paper sheets stacked on the loading table, a support member, and the loading table A presser member mounted on the support member movably over a predetermined range in a direction toward and away from the presser member, and a paper presser and a detection unit including a detector for detecting the position of the presser member. In the paper device, a contact area between a lower end of the pressing member of the paper holding and detecting means and an uppermost sheet of the sheet-like paper on the loading table is 100 mm 2.
A sheet feeding device, which is as follows.
下端は略半球形状である、請求項１７記載の給紙装置。18. The paper feeding device according to claim 17, wherein a lower end of the pressing member of the paper presser and the detector has a substantially hemispherical shape.
降動自在に装着された積載台を含むシート状紙収容手段
と、該積載台上に積載された複数枚のシート状紙の上部
前端に送風する紙浮上及び分離手段、該積載台上に積載
された複数枚のシート状紙のうちの最上位の紙を吸引し
て送出するための吸引送出手段と、支持部材、該積載台
に向かう方向およびこれから離れる方向に所定範囲に渡
って移動自在に該支持部材に装着された押圧部材及び該
押圧部材の位置を検出するための検出器を含む紙押え及
び検出手段とを具備する給紙装置において、 該紙押え及び検出手段の該押圧部材は、該積載台上から
の紙の送出方向に見て紙の後縁から５０ｍｍ以内の位置
で、該積載台上の最上位の紙に押圧せしめられる、 ことを特徴とする給紙装置。19. A sheet-shaped paper storage means including a stacking table movably mounted thereon, on which a plurality of sheet-shaped sheets are stacked, and an upper portion of the plurality of sheet-shaped sheets stacked on the stacking table. Paper floating and separating means for blowing to the front end, suction and sending means for sucking and sending the uppermost sheet of a plurality of sheet-like paper sheets stacked on the loading table, a support member, and the loading table A presser member mounted on the support member movably over a predetermined range in a direction toward and away from the presser member, and a paper presser and a detection unit including a detector for detecting the position of the presser member. In the paper device, the pressing member of the paper presser and the detecting unit may be disposed on the uppermost paper on the loading table at a position within 50 mm from a trailing edge of the paper when viewed in the paper sending direction from the loading table. A sheet feeding device, which is pressed.
は、該積載台上からの紙の送出方向に見て紙の後縁から
３０ｍｍ以内の位置で、該積載台上の最上位の紙に押圧
せしめられる、請求項１９記載の給紙装置。20. The pressing member of the paper holding and detecting means is located at a position within 30 mm from a trailing edge of the paper as viewed in a direction in which the paper is sent out from the loading table, and is a topmost paper on the loading table. The sheet feeding device according to claim 19, wherein the sheet feeding device is pressed against the sheet feeding device.
は、寸法が異なった複数種のシート状紙が選択的に載置
され、複数種のシート状紙のいずれが該積載台上に載置
される場合も前縁が所定位置に整合せしめられ、 該紙押え及び検出手段の該支持部材は、該積載台上のシ
ート紙の送出方向における位置が調節自在である、請求
項１９又は２０記載の給紙装置。21. A plurality of types of sheet-like papers having different dimensions are selectively placed on the loading table of the sheet-type paper storing means, and any one of the plurality of types of sheet-like papers is placed on the loading table. The front edge is also aligned with a predetermined position even when the sheet is placed on the sheet support, and the position of the support member of the sheet presser and the detecting means in the sheet sheet feeding direction on the stacking table is adjustable. Or the paper feeding device according to 20;
のシート紙の送出方向及びその逆方向に該支持部材を移
動せしめるための電動モータを含んでいる、請求項２１
記載の給紙装置。22. The paper holding and detecting means includes an electric motor for moving the supporting member in a direction in which the sheet paper is sent out on the loading table and in a direction opposite thereto.
Paper feeder as described.
紙の送出方向及びその逆方向に延びる雄ねじ軸、及び該
雄ねじ軸に螺着された雌ねじブロックを介して、該支持
部材に駆動連結されている、請求項２２記載の給紙装
置。23. The electric motor is drivingly connected to the support member via a male screw shaft extending in a direction in which the sheet paper is sent out on the loading table and in a direction opposite thereto, and a female screw block screwed to the male screw shaft. 23. The paper feeding device according to claim 22, wherein the feeding is performed.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24442099A JP3739608B2 (en) | 1999-08-31 | 1999-08-31 | Paper feeder |
| US09/599,512 US6412769B1 (en) | 1999-06-28 | 2000-06-23 | Paper feeder |
| US10/107,355 US6595511B2 (en) | 1999-06-28 | 2002-03-28 | Paper feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24442099A JP3739608B2 (en) | 1999-08-31 | 1999-08-31 | Paper feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001063834A true JP2001063834A (en) | 2001-03-13 |
| JP3739608B2 JP3739608B2 (en) | 2006-01-25 |
Family
ID=17118403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24442099A Expired - Fee Related JP3739608B2 (en) | 1999-06-28 | 1999-08-31 | Paper feeder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3739608B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006327778A (en) * | 2005-05-27 | 2006-12-07 | Ricoh Printing Systems Ltd | Paper feeding device |
| JP2009029577A (en) * | 2007-07-27 | 2009-02-12 | Komori Corp | Position adjusting method and device for part to be adjusted in sheet processing machine |
| JP2011162277A (en) * | 2010-02-04 | 2011-08-25 | Ricoh Co Ltd | Sheet feeding device and image forming apparatus |
| CN103072832A (en) * | 2011-10-26 | 2013-05-01 | 夏普株式会社 | Feeder and image forming apparatus provided with the feeder |
| JP2013095565A (en) * | 2011-11-02 | 2013-05-20 | Ricoh Co Ltd | Recording medium supplying device and image forming apparatus |
-
1999
- 1999-08-31 JP JP24442099A patent/JP3739608B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006327778A (en) * | 2005-05-27 | 2006-12-07 | Ricoh Printing Systems Ltd | Paper feeding device |
| JP4495637B2 (en) * | 2005-05-27 | 2010-07-07 | 株式会社リコー | Paper feeding device and electrophotographic apparatus provided with the same |
| JP2009029577A (en) * | 2007-07-27 | 2009-02-12 | Komori Corp | Position adjusting method and device for part to be adjusted in sheet processing machine |
| JP2011162277A (en) * | 2010-02-04 | 2011-08-25 | Ricoh Co Ltd | Sheet feeding device and image forming apparatus |
| CN103072832A (en) * | 2011-10-26 | 2013-05-01 | 夏普株式会社 | Feeder and image forming apparatus provided with the feeder |
| CN103072832B (en) * | 2011-10-26 | 2016-02-17 | 夏普株式会社 | Paper feed and possess the image processing system of this paper feed |
| JP2013095565A (en) * | 2011-11-02 | 2013-05-20 | Ricoh Co Ltd | Recording medium supplying device and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3739608B2 (en) | 2006-01-25 |
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