JP2000168968A - Paper sheet feeder - Google Patents

Paper sheet feeder

Info

Publication number
JP2000168968A
JP2000168968A JP10361956A JP36195698A JP2000168968A JP 2000168968 A JP2000168968 A JP 2000168968A JP 10361956 A JP10361956 A JP 10361956A JP 36195698 A JP36195698 A JP 36195698A JP 2000168968 A JP2000168968 A JP 2000168968A
Authority
JP
Japan
Prior art keywords
paper
transfer
sheets
sheet
tray
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10361956A
Other languages
Japanese (ja)
Inventor
Satoru Araaki
哲 荒明
Original Assignee
Ricoh Co Ltd
株式会社リコー
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 Ricoh Co Ltd, 株式会社リコー filed Critical Ricoh Co Ltd
Priority to JP10361956A priority Critical patent/JP2000168968A/en
Publication of JP2000168968A publication Critical patent/JP2000168968A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To enhance precision for a stopping position at the time when paper sheets are transferred from one paper sheet storing part to another paper sheet storing part in a tandem type paper sheet feeder. SOLUTION: Paper sheets P stacked in a right tray 1 are fed to an image forming part 4 one by one using a paper sheet feeding part 3. When the sheets P stacked on a bottom plate 6 of the right tray 1 run short, the bottom plate 6 is descended to a lower limit position, and the paper sheets P are transferred onto the right tray 1 by a transfer fence 14 of a left tray 2. After a bundle of the paper sheets P abuts to a side plate of the right tray 1, a filler 11a of a slider 11 blocks a pushing sensor 12, and a stop signal is output to a transfer motor 8. The transfer fence 14 pressed to the slider 11 by a compression spring 9 is evacuated until the slider 11 actually stops. The paper sheets P are surely transfered thereby to a paper sheet feeding position.

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、複写機、プリンタ
等の画像形成装置に用いられる給紙装置に関し、特に二
つの用紙収容部を並列に配置したタンデムタイプの給紙
装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder used for an image forming apparatus such as a copying machine and a printer, and more particularly to a tandem type paper feeder in which two paper storage units are arranged in parallel.
【0002】[0002]
【従来の技術及び発明が解決しようとする課題】二つの
用紙収容部を並列に配置し、第一用紙収容部の用紙がな
くなると自動的に第二用紙収容部に収容されていた用紙
を第一用紙収容部に移送し、連続的に給紙することで、
通常の給紙トレイの2倍の枚数が積載可能ないわゆるタ
ンデムタイプの給紙装置がある。このような装置でタン
デムトレイの移送駆動手段としてはDCモータを使用す
るのが一般的である。
2. Description of the Related Art Two paper storage units are arranged in parallel, and when the first paper storage unit runs out of paper, the paper stored in the second paper storage unit is automatically replaced by the second paper storage unit. By transferring to one paper storage unit and feeding paper continuously,
There is a so-called tandem type sheet feeding device capable of stacking twice the number of sheets of a normal sheet feeding tray. In such a device, a DC motor is generally used as a tandem tray transfer drive unit.
【0003】しかしながら、移送のための待ち時間を短
くするには移送速度を速くしなければならず、そうする
とDCモータのイナーシャによるオーバーラン量が大き
くなってしまい、用紙が第一収容部の横側板に突き当た
ってからも駆動手段が回転するので、駆動手段に過度な
負荷がかかったり、逆に用紙が横側板に突き当たる(正
規の給紙位置)前に移送が終了したりしていた。
[0003] However, in order to shorten the waiting time for the transfer, the transfer speed must be increased, so that the amount of overrun due to the inertia of the DC motor becomes large, and the paper is transferred to the side plate of the first storage unit. Since the driving means rotates even after hitting the paper, an excessive load is applied to the driving means, and conversely, the transfer ends before the paper hits the horizontal side plate (regular paper feeding position).
【0004】本発明は、上記従来の問題点にかんがみ、
停止精度のすぐれた高価なモータを用いずに移送フェン
スに移送方向のバッファをもたせることで、用紙の停止
位置精度の向上を図った給紙装置を提供することを目的
とする。
The present invention has been made in view of the above-mentioned conventional problems,
It is an object of the present invention to provide a paper feeder in which a stop position accuracy of a sheet is improved by providing a transfer fence with a buffer in a transfer direction without using an expensive motor having excellent stop accuracy.
【0005】また本発明は、用紙補給の際に用紙端面の
基準となる移送フェンスを固定し、用紙セット性を低下
させないことを図った給紙装置を提供することを目的と
する。
It is another object of the present invention to provide a paper feeding device in which a transfer fence serving as a reference for a paper end surface when paper is replenished is fixed so that the paper setting property is not reduced.
【0006】[0006]
【課題を解決するための手段】本発明の給紙装置のうち
請求項1に係るものは、上記目的を達成するために、複
数枚の用紙を積載する第一用紙収容部と、該第一用紙収
容部の用紙を1枚ずつ給紙する給紙手段と、上記第一用
紙収容部の用紙を給紙位置まで上昇させる昇降手段と、
上記第一用紙収容部の横方向に並列に配置された第二用
紙収容部と、該第二用紙収容部の用紙を上記第一用紙収
容部へ一括して移送する移送手段とを有する給紙装置に
おいて、上記移送手段が、上記用紙の移送が完了したこ
とを検知する第一の検知手段と、該第一の検知手段が検
知する突部を有する移動部材と、該移動部材を駆動する
駆動手段と、上記移動部材がホーム位置に位置すること
を検知する第二の検知手段と、積載される用紙の水平方
向を規制しかつ移送時には用紙を上記第一用紙収容部へ
押す移送フェンスとからなり、該移送フェンスを上記移
動部材に対し水平方向に移動可能に取り付けてなること
を特徴とする。
According to a first aspect of the present invention, there is provided a sheet feeding device for storing a plurality of sheets, a first sheet storing portion for storing a plurality of sheets, and Paper feeding means for feeding the paper in the paper storage unit one by one, elevating means for raising the paper in the first paper storage unit to a paper feeding position,
A paper feeder comprising: a second paper storage unit arranged in parallel in the lateral direction of the first paper storage unit; and a transfer unit that collectively transfers the sheets of the second paper storage unit to the first paper storage unit. In the apparatus, the transfer unit detects a completion of the transfer of the sheet, a first detecting unit, a moving member having a protrusion detected by the first detecting unit, and a drive for driving the moving member. Means, a second detecting means for detecting that the moving member is located at the home position, and a transfer fence for regulating the horizontal direction of the stacked sheets and pressing the sheets to the first sheet storage portion during transfer. And the transfer fence is attached to the moving member so as to be movable in a horizontal direction.
【0007】同請求項2に係るものは、給紙位置を基準
とした時、積載した用紙の後端部より手前に上記移送部
材が移動する位置に上記第一の検知手段を配置したこと
を特徴とする。
According to a second aspect of the present invention, the first detecting means is disposed at a position where the transfer member moves before the trailing end of the stacked sheets with reference to the sheet feeding position. Features.
【0008】同請求項3に係るものは、上記移送フェン
スを上記移動部材に対して固定する固定部材を有し、該
固定部材が上記ホーム位置から移動すると固定を解除す
ることを特徴とする。
[0008] According to a third aspect of the present invention, there is provided a fixing member for fixing the transfer fence to the moving member, and releasing the fixing when the fixing member moves from the home position.
【0009】[0009]
【発明の実施の形態】以下本発明の実施の形態を図面を
参照して説明する。図1は本発明に係る給紙装置の一実
施形態を用いた画像形成装置の断面図(A)及び第二用
紙収容部である左トレイの移送機構を示す斜視図(B)
であり、図2は図1の装置の第一用紙収容部である右ト
レイの上昇機構を示す斜視図(A)及び下限センサの設
置形態を拡大して示す斜視図(B)である。図中1は第
一用紙収容部(以後右トレイという。)、2は第二用紙
収容部(以後左トレイという。)、3は給紙部、4は画
像形成部(詳細な図示は省略してある。)、5は昇降モ
ータ、6は底板、7は下限センサ、8は移送モータ、9
は圧縮スプリング、10は横側板、11はスライダ、1
2は押し付けセンサ、13はホーム検知センサ、14は
移送フェンス、15はベースである。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of an image forming apparatus using an embodiment of a sheet feeding device according to the present invention (A), and a perspective view (B) showing a transfer mechanism of a left tray that is a second sheet storage unit.
2 is a perspective view (A) showing a raising mechanism of a right tray, which is a first sheet storage unit of the apparatus of FIG. 1, and an enlarged perspective view (B) showing an installation form of a lower limit sensor. In the drawing, reference numeral 1 denotes a first paper storage unit (hereinafter referred to as a right tray), 2 denotes a second paper storage unit (hereinafter referred to as a left tray), 3 denotes a paper feed unit, and 4 denotes an image forming unit (detailed illustration is omitted). 5 is a lifting motor, 6 is a bottom plate, 7 is a lower limit sensor, 8 is a transfer motor, 9
Is a compression spring, 10 is a side plate, 11 is a slider, 1
2 is a pressing sensor, 13 is a home detection sensor, 14 is a transfer fence, and 15 is a base.
【0010】右トレイ1は、ワイヤ16で底板6を吊
り、昇降モータ5でワイヤ16を巻き取りあるいは巻き
出しして底板6を昇降動させる。右トレイ1に積載され
ている用紙Pは、給紙部3によって一枚ずつ画像形成部
4に給紙される。右トレイ1に積載されている用紙Pが
なくなると、昇降モータ5が逆転して底板6が下限セン
サ7で検知されるまで下降する。下限センサ7が底板6
を検知すると、左トレイ2側の移送モータ8が正転する
ことで移送フェンス14を右トレイ1側に移動させ、左
トレイ2に積載されている用紙Pを右トレイ1の底板6
上へ移送し始める。
The right tray 1 suspends the bottom plate 6 with the wire 16 and winds or unwinds the wire 16 with the elevating motor 5 to move the bottom plate 6 up and down. The sheets P stacked on the right tray 1 are fed one by one to the image forming unit 4 by the sheet feeding unit 3. When the sheets P stacked on the right tray 1 are exhausted, the elevating motor 5 rotates reversely and descends until the bottom plate 6 is detected by the lower limit sensor 7. Lower limit sensor 7 is bottom plate 6
Is detected, the transfer fence 14 is moved to the right tray 1 side by the forward rotation of the transfer motor 8 on the left tray 2 side, and the sheets P stacked on the left tray 2 are moved to the bottom plate 6 of the right tray 1.
Start transferring to the top.
【0011】用紙Pの束が右トレイ1の横側板10に突
き当たってからスライダ11に設けられているフィラー
11aが押し付けセンサ12を遮蔽すると、図示せぬ制
御回路から移送モータ8へ停止信号が出される。圧縮ス
プリング9によりスライダ11に押し付けられている移
送フェンス14は、移送モータ8への停止信号が出され
てから、実際にスライダ11が停止するまで待避してい
るので、確実に用紙Pは給紙位置(横側板10に突き当
たった位置)に移送される。
When the filler 11a provided on the slider 11 shields the pressing sensor 12 after the bundle of sheets P abuts the horizontal side plate 10 of the right tray 1, a stop signal is sent to the transfer motor 8 from a control circuit (not shown). It is. Since the transfer fence 14 pressed against the slider 11 by the compression spring 9 is retracted until the slider 11 actually stops after the stop signal to the transfer motor 8 is issued, the sheet P is reliably fed. It is transferred to a position (a position where it abuts on the lateral side plate 10).
【0012】図3は移送部の構成を示す断面図、図4は
固定部材の構成を示す断面図である。図中17は固定部
材、18は段ネジである。固定部材17は、段ネジ18
でスライダ11に締結されており、垂直方向に移動可能
で、移送中は自重で下側に位置して移送フェンス14の
稼動領域から待避している。スライダ11の停止後に移
送モータ8が逆転し、スライダ11は元の位置のほうへ
移動していってホーム検知センサ13がフィラー11a
を検知した後に停止する。その際、図4に示すように、
べース15の突起部15aに乗り上げて上方に移動し、
移送フェンス14を固定する。このため、ユーザーが用
紙Pを補給する際、移送フェンス14に用紙Pを突き当
ててセットしても用紙Pの後端の基準となりうる。
FIG. 3 is a sectional view showing the structure of the transfer section, and FIG. 4 is a sectional view showing the structure of the fixing member. In the figure, 17 is a fixing member, and 18 is a step screw. The fixing member 17 includes a shoulder screw 18.
And is movable in the vertical direction, and is located under the own weight during the transfer and is evacuated from the operating area of the transfer fence 14. After the slider 11 stops, the transfer motor 8 rotates in the reverse direction, the slider 11 moves to the original position, and the home detecting sensor 13 detects the filler 11a.
Stop after detecting At that time, as shown in FIG.
Riding on the projection 15a of the base 15 and moving upward,
The transfer fence 14 is fixed. For this reason, when the user replenishes the paper P, the rear end of the paper P can be used as a reference even if the user sets the paper P against the transfer fence 14.
【0013】[0013]
【発明の効果】請求項1の給紙装置は、以上説明してき
たように、複数枚の用紙を積載できる第一用紙収容部の
横方向に並列に配置された第二用紙収容部の用紙を第一
用紙収容部へ一括して移送する移送手段が、用紙の移送
が完了したことを検知する第一の検知手段と、第一の検
知手段が検知する突部を有する移動部材と、移動部材を
駆動する駆動手段と、移動部材がホーム位置に位置する
ことを検知する第二の検知手段と、積載される用紙の水
平方向を規制しかつ移送時には用紙を第一用紙収容部へ
押す移送フェンスとからなり、この移送フェンスを移動
部材に対し水平方向に移動可能に取り付けてなるので、
用紙が第一用紙収容部内でそれ以上移動できないように
するための部位に突き当たってから、用紙を直接に押し
ている移送フェンスが待避するようになるので、駆動手
段に過度な負荷が掛からないようになるという効果があ
る。
According to the first aspect of the present invention, as described above, the paper of the second paper storage unit arranged in parallel in the lateral direction of the first paper storage unit capable of loading a plurality of papers is used. A transfer unit that collectively transfers the sheet to the first sheet storage unit, a first detection unit that detects that the transfer of the sheet is completed, a moving member having a protrusion that the first detection unit detects, and a moving member Drive means for driving the moving member, a second detecting means for detecting that the moving member is located at the home position, and a transfer fence for regulating the horizontal direction of the stacked sheets and for pushing the sheets to the first sheet storage portion during transfer. Since this transfer fence is attached to the moving member so that it can move in the horizontal direction,
Since the transfer fence directly pushing the paper is retracted after hitting the part for preventing the paper from moving any more in the first paper storage part, the driving means is not overloaded. It has the effect of becoming.
【0014】請求項2の給紙装置においては、給紙位置
を基準とした時、積載した用紙の後端部より手前に移送
部材が移動する位置に第一の検知手段を配置したので、
用紙が第一用紙収容部内でそれ以上移動できないように
なってから移送完了が検知されるので、上記共通の効果
に加え、用紙が正規の給紙位置に確実に移送されるとい
う効果がある。
According to the second aspect of the present invention, the first detecting means is disposed at a position where the transfer member moves before the trailing end of the stacked sheets with respect to the sheet feeding position.
Since the completion of the transfer is detected after the paper cannot move any more in the first paper storage portion, in addition to the above-mentioned common effect, there is an effect that the paper is surely transferred to the regular paper feed position.
【0015】請求項3の給紙装置においては、移送フェ
ンスを移動部材に対して固定する固定部材がホーム位置
から移動すると固定を解除するようにしたので、移送フ
ェンスがホーム位置に位置しているときは固定部材によ
り移送フェンスが固定されるので、上記共通の効果に加
え、セット時に用紙を移送フェンスに突き当てても移動
せず、セット時の用紙後端の基準になりうるという効果
がある。
In the sheet feeder according to the third aspect, the fixing member for fixing the transfer fence to the moving member is released when the fixing member moves from the home position, so that the transfer fence is located at the home position. In some cases, since the transfer fence is fixed by the fixing member, in addition to the above-described common effect, the sheet does not move even if the sheet hits the transfer fence at the time of setting, and has an effect that the sheet can be used as a reference for the trailing edge of the sheet at the time of setting. .
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明に係る給紙装置の一実施形態を用いた画
像形成装置の断面図(A)と第二用紙収容部である左ト
レイの移送機構を示す斜視図(B)である。
FIG. 1A is a cross-sectional view of an image forming apparatus using an embodiment of a sheet feeding device according to the present invention, and FIG. 1B is a perspective view showing a transfer mechanism of a left tray serving as a second sheet storage unit.
【図2】図1の装置の第一用紙収容部である右トレイの
上昇機構を示す斜視図(A)及び下限センサの設置形態
を拡大して示す斜視図(B)である。
FIGS. 2A and 2B are a perspective view illustrating a raising mechanism of a right tray, which is a first sheet storage unit of the apparatus of FIG. 1, and an enlarged perspective view illustrating an installation form of a lower limit sensor.
【図3】図1の装置の移送部の構成を示す断面図であ
る。
FIG. 3 is a cross-sectional view illustrating a configuration of a transfer unit of the apparatus of FIG.
【図4】図1の装置の固定部材の構成を示す断面図であ
る。
FIG. 4 is a cross-sectional view illustrating a configuration of a fixing member of the device of FIG.
【符号の説明】[Explanation of symbols]
1 第一用紙収容部 2 第二用紙収容部 3 給紙部 4 画像形成部 5 昇降モータ 6 底板 7 下限センサ 8 移送モータ 9 圧縮スプリング 10 横側板 11 スライダ 11a フィラー 12 押し付けセンサ 13 ホーム検知センサ 14 移送フェンス 15 べース 15a 突起部 16 ワイヤ 17 固定部材 18 段ネジ REFERENCE SIGNS LIST 1 First paper storage unit 2 Second paper storage unit 3 Paper feed unit 4 Image forming unit 5 Elevating motor 6 Bottom plate 7 Lower limit sensor 8 Transfer motor 9 Compression spring 10 Side plate 11 Slider 11a Filler 12 Press sensor 13 Home detection sensor 14 Transfer Fence 15 base 15a protrusion 16 wire 17 fixing member 18 step screw

Claims (3)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 複数枚の用紙を積載する第一用紙収容部
    と、該第一用紙収容部の用紙を1枚ずつ給紙する給紙手
    段と、上記第一用紙収容部の用紙を給紙位置まで上昇さ
    せる昇降手段と、上記第一用紙収容部の横方向に並列に
    配置された第二用紙収容部と、該第二用紙収容部の用紙
    を上記第一用紙収容部へ一括して移送する移送手段とを
    有する給紙装置において、上記移送手段が、上記用紙の
    移送が完了したことを検知する第一の検知手段と、該第
    一の検知手段が検知する突部を有する移動部材と、該移
    動部材を駆動する駆動手段と、上記移動部材がホーム位
    置に位置することを検知する第二の検知手段と、積載さ
    れる用紙の水平方向を規制しかつ移送時には用紙を上記
    第一用紙収容部へ押す移送フェンスとからなり、該移送
    フェンスを上記移動部材に対し水平方向に移動可能に取
    り付けてなることを特徴とする給紙装置。
    A first sheet storage unit for stacking a plurality of sheets, a sheet feeding unit for feeding sheets of the first sheet storage unit one by one, and a sheet feeding unit for feeding the sheets of the first sheet storage unit Elevating means for raising to a position, a second paper storage unit arranged in parallel in the lateral direction of the first paper storage unit, and collectively transferring the paper in the second paper storage unit to the first paper storage unit And a moving member having a protrusion that is detected by the first detecting unit, and that the first detecting unit detects that the transfer of the sheet is completed. Driving means for driving the moving member, second detecting means for detecting that the moving member is located at the home position, regulating the horizontal direction of the stacked sheets, and transferring the sheets to the first sheet during transfer. And a transfer fence that pushes the container into the storage section. A sheet feeding device, which is attached to a member so as to be movable in a horizontal direction.
  2. 【請求項2】 給紙位置を基準とした時、積載した用紙
    の後端部より手前に上記移送部材が移動する位置に上記
    第一の検知手段を配置したことを特徴とする請求項1の
    給紙装置。
    2. The apparatus according to claim 1, wherein the first detecting means is arranged at a position where the transfer member moves before a trailing end of the stacked sheets with respect to a sheet feeding position. Paper feeder.
  3. 【請求項3】 上記移送フェンスを上記移動部材に対し
    て固定する固定部材を有し、該固定部材が上記ホーム位
    置から移動すると固定を解除することを特徴とする請求
    項1の給紙装置。
    3. The sheet feeding device according to claim 1, further comprising a fixing member for fixing the transfer fence to the moving member, wherein the fixing member is released when the fixing member moves from the home position.
JP10361956A 1998-12-03 1998-12-03 Paper sheet feeder Pending JP2000168968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10361956A JP2000168968A (en) 1998-12-03 1998-12-03 Paper sheet feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10361956A JP2000168968A (en) 1998-12-03 1998-12-03 Paper sheet feeder

Publications (1)

Publication Number Publication Date
JP2000168968A true JP2000168968A (en) 2000-06-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP10361956A Pending JP2000168968A (en) 1998-12-03 1998-12-03 Paper sheet feeder

Country Status (1)

Country Link
JP (1) JP2000168968A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8585037B1 (en) 2012-11-08 2013-11-19 Xerox Corporation Tandem media tray using mid-tray sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8585037B1 (en) 2012-11-08 2013-11-19 Xerox Corporation Tandem media tray using mid-tray sensor

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