JP4789262B2 - Paper feeder - Google Patents
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- JP4789262B2 JP4789262B2 JP2006315670A JP2006315670A JP4789262B2 JP 4789262 B2 JP4789262 B2 JP 4789262B2 JP 2006315670 A JP2006315670 A JP 2006315670A JP 2006315670 A JP2006315670 A JP 2006315670A JP 4789262 B2 JP4789262 B2 JP 4789262B2
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Description
本発明は、プリンタの給紙装置に関するものである。 The present invention relates to a paper feeding device for a printer.
従来は、最上位用紙の上面位置を検出する方式は最上位用紙の上面に接触させた遮蔽板が所定位置に設置された光学式デジタルセンサをON/OFFする方式や光学式アナログセンサの電圧変化を監視し、検出電圧にて最上位用紙の上面位置を一定に保つようになっている(例えば、特許文献1、2参照)。また、光学式アナログセンサに弾性部材を遮蔽板として用いている(例えば、特許文献3参照)。
Conventionally, a method for detecting the upper surface position of the uppermost sheet is a method for turning on / off an optical digital sensor in which a shielding plate in contact with the upper surface of the uppermost sheet is installed at a predetermined position, or a voltage change of the optical analog sensor. The upper surface position of the uppermost sheet is kept constant by the detection voltage (see, for example,
用紙の上部をエアー噴き出しにより分離し、吸着搬送ベルトによって用紙を吸着し、送り出す用紙給紙装置にとって、最上位用紙の上面位置を常に一定に保つことは安定した給紙を達成するためには不可欠である。 For the paper feeding device that separates the top of the paper by air blowing, sucks the paper by the suction conveyance belt, and sends it out, it is indispensable to always keep the top surface of the topmost paper constant. It is.
そのため、最上位用紙の上面位置の検出は分離のためのエアーによる用紙の浮上、ばたつきに影響されないように用紙後端部に一定荷重以上の重量をもった遮蔽板を用紙の上面に接触するように配置し、所定位置に設置された光学式センサの検出の有無で、トレイを上昇させて用紙の上面位置を一定に保つ。光学式センサは一般的にON/OFFを検出するデジタルセンサを用いられている場合が多いが、用紙のカールなどの影響による高さのばらつきを補正できるようにアナログセンサを用いることが、より安定した上面位置の検出に有効である。光学式アナログセンサの場合は発光側の光が遮蔽板によって遮られる光量の変化を受光側が電圧に変えて検出しているため、遮蔽板の移動位置のばらつきによっては光の回り込みによって正しい検出ができない場合がある。 Therefore, detection of the upper surface position of the uppermost sheet is made so that a shielding plate having a weight of a certain load or more is brought into contact with the upper surface of the sheet so as not to be affected by floating or flapping of the sheet by air for separation. The tray is raised and the upper surface position of the paper is kept constant by detecting whether or not the optical sensor installed at a predetermined position is detected. In general, digital sensors that detect ON / OFF are often used as optical sensors, but it is more stable to use analog sensors so that variations in height due to the effects of paper curl can be corrected. It is effective for detecting the upper surface position. In the case of an optical analog sensor, the light receiving side detects the change in the amount of light blocked by the light shielding side by changing the voltage to the light receiving side. There is a case.
そのため、弾性遮蔽部材を配置し、かつ、該弾性遮蔽部材は遮蔽板より大きくし、アナログセンサの検出面に接触させることで、正確な用紙の上面位置を検出するようにした給紙装置が知られている。本構成を図3、図4により説明する。 For this reason, there is known a paper feeding device in which an elastic shielding member is disposed and the elastic shielding member is made larger than the shielding plate and is brought into contact with the detection surface of the analog sensor so as to accurately detect the upper surface position of the paper. It has been. This configuration will be described with reference to FIGS.
図3、図4において、用紙ホッパ(図示せず)内トレイ1上に積載された用紙2の上位部分はエアー噴き出し機構4によって先端を分離され、最上位用紙3のみが吸着搬送機構5によって吸着され送り出される。吸着搬送機構5で用紙2を1枚ずつ正確に送り出すためにはエアー噴き出し機構4の噴き出しエアーを常に安定して用紙枚数に当てることが用紙2を分離するために必要である。そのため、噴き出しエアーによる用紙浮上のばたつきに影響を受けないようにするために、一定以上の重量で用紙を押さえることのできる遮蔽板6を最上位用紙3の後端上面に接触させ、遮蔽板6の高さを光学式アナログセンサ7にて検出し、用紙2の上面位置を検出してトレイ1を上下に可動させる機構(図示せず)によって、用紙2の上面位置を一定に保つ。光学式アナログセンサ7は、発光部8と受光部9が対向して配置されている。一般に、発光部8はLEDランプ、受光部9はCCDセンサにて構成されており、発光部8は光を受光部9に照射し、受光部9は受ける光量を電圧に変える。遮蔽板6の位置が変われば受光される光量も変化するために位置が検出できる。遮蔽板6は光学式アナログセンサの発光部8と受光部9の間を可動する。そのため、遮蔽板6は発光部8の光の回り込みの影響を受けなくするため受光部9側に近い位置を可動するようにしている。また、遮蔽板6は案内板等(図示せず)によって、発光部8と受光部9のほぼ一定位置を可動するようになっている。しかしながら、遮蔽板6は噴き出しエアーによる用紙2の浮上のばたつきを押さえるための重量と剛性を必要とするため受光部9に対してわずかながら離す必要がある。そのため、発光部8からの光の回り込みが起き、正確な検出ができない場合がある。そこで、図4に示すように遮蔽板6に弾性遮蔽部材10を付加することにより、受光部9に接触させている。
3 and 4, the upper portion of the
ところが図4の構成では、弾性遮蔽部材10は遮蔽板6の可動方向と平行に貼り付けられているものの、弾性遮蔽部材10と光学式アナログセンサ7の受光面9と接触する面とは逆の面に貼り付けられている(図4のCとD)。即ち、弾性遮蔽部材10と光学式アナログセンサ7の受光部9と接触する面Cは、弾性遮蔽部材10と遮蔽板6と接触する面(貼り付け面)Dとは逆の面となっている。このため、弾性遮蔽部材10が繰り返し接触、可動することによって、楔のように貼り付け面に力が加わり、弾性遮蔽部材10が浮き上がったり、剥離等が発生するという課題があった。
However, in the configuration of FIG. 4, the
本発明は、弾性遮蔽部材の浮き上がり、剥離等を防止して、安定した信頼性の高い給紙装置を提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a stable and highly reliable paper feeding device by preventing the elastic shielding member from being lifted and peeled off.
上記目的は、トレイに積載された用紙の上部を浮上、分離のためのエアー噴き出し手段と、前記トレイ上の最上位の用紙を吸着して搬送する搬送ベルトから構成され、最上位の用紙の上面を検出するために発光面と受光面とを有する光学式アナログセンサを用いて最上位用紙の上面位置を常に一定位置に保つため、用紙の上面とともに可動し上面位置を検出させる遮蔽板に弾性遮蔽部材を配置し、且つ前記遮蔽板および前記弾性遮蔽部材を前記光学式アナログセンサの前記発光面と前記受光面との間に位置するように配置し、前記弾性遮蔽部材を前記光学式アナログセンサの前記受光面に接触させた給紙装置において、前記遮蔽板の発光面側の面を遮蔽板第1面とし、前記遮蔽板の受光面側の面を遮蔽板第2面としたとき、前記遮蔽板は、前記弾性遮蔽部材を前記遮蔽板第2面側から遮蔽板第1面側へ通すための挿通部を有し、前記弾性遮蔽部材は、前記遮蔽板の可動方向と平行に配置され、前記挿通部を通して前記弾性遮蔽部材と前記受光面と接触する面が、前記弾性遮蔽部材と前記遮蔽板第1面とが接触する面と同一面になるように、且つ前記弾性遮蔽部材の一端が前記受光面に接触し、他端が前記遮蔽板第1面に接触するように配置されたことを特徴とする。また、トレイに積載された用紙の上部を浮上、分離のためのエアー噴き出し手段と、前記トレイ上の最上位の用紙を吸着して搬送する搬送ベルトから構成され、最上位の用紙の上面を検出するために発光面と受光面とを有する光学式アナログセンサを用いて最上位用紙の上面位置を常に一定位置に保つため、用紙の上面とともに可動し上面位置を検出させる遮蔽板に弾性遮蔽部材を配置し、且つ前記遮蔽板および前記弾性遮蔽部材を前記光学式アナログセンサの前記発光面と前記受光面との間に位置するように配置し、前記弾性遮蔽部材を前記光学式アナログセンサの前記受光面に接触させた給紙装置において、前記遮蔽板の発光面側の面を遮蔽板第1面とし、前記遮蔽板の受光面側の面を遮蔽板第2面としたとき、前記遮蔽板は、前記弾性遮蔽部材を前記遮蔽板第2面側から遮蔽板第1面側へ通すための穴部を有し、前記弾性遮蔽部材は、前記遮蔽板の可動方向と平行に配置され、前記穴部を通して前記弾性遮蔽部材と前記受光面と接触する面が、前記弾性遮蔽部材と前記遮蔽板第1面とが接触する面と同一面になるように、且つ前記弾性遮蔽部材の一端が前記受光面に接触し、他端が前記遮蔽板第1面に接触するように配置されたことを特徴とする。 The above object comprises air blowing means for floating and separating the upper part of the paper loaded on the tray, and a conveying belt for adsorbing and conveying the uppermost paper on the tray, and the upper surface of the uppermost paper. An optical analog sensor having a light emitting surface and a light receiving surface is used to detect the image, and the upper surface of the uppermost sheet is always kept at a fixed position. A member is disposed, and the shielding plate and the elastic shielding member are disposed so as to be positioned between the light emitting surface and the light receiving surface of the optical analog sensor, and the elastic shielding member is disposed on the optical analog sensor. In the sheet feeding device in contact with the light receiving surface, when the light emitting surface side surface of the shielding plate is a shielding plate first surface and the light receiving surface side surface of the shielding plate is a shielding plate second surface, the shielding is performed. The board is in front The elastic shielding member has an insertion portion for passing the elastic shielding member from the second surface side of the shielding plate to the first surface side of the shielding plate, and the elastic shielding member is disposed in parallel with the movable direction of the shielding plate and passes through the insertion portion. The surface in contact with the elastic shielding member and the light receiving surface is flush with the surface in contact with the elastic shielding member and the first surface of the shielding plate, and one end of the elastic shielding member is on the light receiving surface. The other end is disposed so as to be in contact with the first surface of the shielding plate. Also, it consists of air blowing means for floating and separating the top of the paper loaded on the tray, and a transport belt that sucks and transports the top paper on the tray, and detects the top surface of the top paper In order to maintain the upper surface position of the uppermost sheet at a constant position by using an optical analog sensor having a light emitting surface and a light receiving surface, an elastic shielding member is provided on the shielding plate that moves with the upper surface of the sheet and detects the upper surface position. And the shielding plate and the elastic shielding member are arranged so as to be positioned between the light emitting surface and the light receiving surface of the optical analog sensor, and the elastic shielding member is disposed on the light receiving surface of the optical analog sensor. In the sheet feeding device in contact with the surface, when the light-emitting surface side surface of the shielding plate is a shielding plate first surface and the light-receiving surface side surface of the shielding plate is a shielding plate second surface, the shielding plate is The elasticity A hole for passing the shielding member from the second surface side of the shielding plate to the first surface side of the shielding plate, and the elastic shielding member is arranged in parallel with the movable direction of the shielding plate, A surface in contact with the elastic shielding member and the light receiving surface is flush with a surface in contact with the elastic shielding member and the first surface of the shielding plate, and one end of the elastic shielding member is in contact with the light receiving surface. The other end is arranged so as to contact the first surface of the shielding plate.
本発明によれば、安価、簡易な取り付けによって、遮蔽部材の浮き上がり、剥離等を防止することができ、かつ、安定した信頼性の高い給紙装置を提供することができる。 According to the present invention, it is possible to provide a stable and highly reliable paper feeding device that can prevent the shielding member from being lifted, peeled off, and the like by inexpensive and simple attachment.
以下に、本発明の実施例を図1、2、5、6に基づいて説明する。 Embodiments of the present invention will be described below with reference to FIGS.
図1は、本発明の実施例の側面図を示す。図2は、図1のA部拡大図でB方向から見た図である。なお、図1、2において、図3、4と同じ符号は同じ部分を示し、説明を省略する。 FIG. 1 shows a side view of an embodiment of the present invention. FIG. 2 is an enlarged view of part A of FIG. 1 as viewed from the B direction. 1 and 2, the same reference numerals as those in FIGS.
図1、2において、6aは遮蔽板であり、10aは弾性遮蔽部材である。遮蔽板6aは図5に示すように可動方向と平行にその下部を逆コの字形状としている。図2に示すように、弾性遮蔽部材10aは、遮蔽板6aの可動方向と平行に配置し、かつ、弾性遮蔽部材10aと光学式アナログセンサ7の受光面9とが接触する面Cが、弾性遮蔽部材10aと遮蔽板6aとが接触する面Dと同一面になるように貼り付けられている(図2のCとD)。
1 and 2, 6a is a shielding plate, and 10a is an elastic shielding member. As shown in FIG. 5, the lower part of the
なお、本実施例では、遮蔽板6aの下部を逆コの字形状としたが、例えば図6に示すように遮蔽板に角穴6bを設け、この角穴6bの中に弾性遮蔽部材10aを通すような構成としても同様の効果が得られる。
In this embodiment, the lower part of the
上記したように、弾性遮蔽部材10aと光学式アナログセンサ7の受光部9とが接触する面Cが、弾性遮蔽部材10aと遮蔽板6aとが接触する面Dと同一面になるように、逆コの字形状の間を通して、弾性遮蔽部材10aを遮蔽板6aの下部に貼り付けることによって、弾性遮蔽部材10aは遮蔽板6aの逆コの字形状の上側に案内、保護される。また、繰り返しの可動に対しても貼り付け部分に負荷がかからないようになる。
As described above, the surface C where the elastic shielding member 10a and the light receiving portion 9 of the
1はトレイ、2は用紙、3は最上位の用紙、4はエアー噴き出し機構、5は吸着搬送機構、6,6aは遮蔽板、7は光学式アナログセンサ、8は発光部、9は受光部、10,10aは弾性遮蔽部材である。 1 is a tray, 2 is a sheet, 3 is a top sheet, 4 is an air ejection mechanism, 5 is a suction conveyance mechanism, 6 and 6a are shielding plates, 7 is an optical analog sensor, 8 is a light emitting unit, and 9 is a light receiving unit. 10 and 10a are elastic shielding members.
Claims (3)
前記遮蔽板の発光面側の面を遮蔽板第1面とし、前記遮蔽板の受光面側の面を遮蔽板第2面としたとき、
前記遮蔽板は、前記弾性遮蔽部材を前記遮蔽板第2面側から遮蔽板第1面側へ通すための挿通部を有し、
前記弾性遮蔽部材は、前記遮蔽板の可動方向と平行に配置され、前記挿通部を通して前記弾性遮蔽部材と前記受光面と接触する面が、前記弾性遮蔽部材と前記遮蔽板第1面とが接触する面と同一面になるように、且つ前記弾性遮蔽部材の一端が前記受光面に接触し、他端が前記遮蔽板第1面に接触するように配置されたことを特徴とする給紙装置。 To detect the upper surface of the uppermost sheet, comprising air blowing means for floating and separating the paper loaded on the tray, and a conveying belt that sucks and conveys the uppermost sheet on the tray In order to keep the upper surface position of the uppermost paper at a constant position using an optical analog sensor having a light emitting surface and a light receiving surface, an elastic shielding member is arranged on a shielding plate that moves with the upper surface of the paper and detects the upper surface position. And the shielding plate and the elastic shielding member are disposed so as to be positioned between the light emitting surface and the light receiving surface of the optical analog sensor, and the elastic shielding member is disposed on the light receiving surface of the optical analog sensor. In the paper feeder that is in contact,
When the surface on the light emitting surface side of the shielding plate is a shielding plate first surface and the surface on the light receiving surface side of the shielding plate is a shielding plate second surface,
The shielding plate has an insertion portion for passing the elastic shielding member from the shielding plate second surface side to the shielding plate first surface side,
The elastic shielding member is disposed in parallel with the movable direction of the shielding plate, and the surface that contacts the elastic shielding member and the light receiving surface through the insertion portion is in contact with the elastic shielding member and the first surface of the shielding plate. The sheet feeding device is arranged so as to be flush with a surface to be touched, and one end of the elastic shielding member is in contact with the light receiving surface, and the other end is in contact with the first surface of the shielding plate. .
前記遮蔽板の発光面側の面を遮蔽板第1面とし、前記遮蔽板の受光面側の面を遮蔽板第2面としたとき、
前記遮蔽板は、前記弾性遮蔽部材を前記遮蔽板第2面側から遮蔽板第1面側へ通すための穴部を有し、
前記弾性遮蔽部材は、前記遮蔽板の可動方向と平行に配置され、前記穴部を通して前記弾性遮蔽部材と前記受光面と接触する面が、前記弾性遮蔽部材と前記遮蔽板第1面とが接触する面と同一面になるように、且つ前記弾性遮蔽部材の一端が前記受光面に接触し、他端が前記遮蔽板第1面に接触するように配置されたことを特徴とする給紙装置。 To detect the upper surface of the uppermost sheet, comprising air blowing means for floating and separating the paper loaded on the tray, and a conveying belt that sucks and conveys the uppermost sheet on the tray In order to keep the upper surface position of the uppermost paper at a constant position using an optical analog sensor having a light emitting surface and a light receiving surface, an elastic shielding member is arranged on a shielding plate that moves with the upper surface of the paper and detects the upper surface position. And the shielding plate and the elastic shielding member are disposed so as to be positioned between the light emitting surface and the light receiving surface of the optical analog sensor, and the elastic shielding member is disposed on the light receiving surface of the optical analog sensor. In the paper feeder that is in contact,
When the surface on the light emitting surface side of the shielding plate is a shielding plate first surface and the surface on the light receiving surface side of the shielding plate is a shielding plate second surface,
The shielding plate has a hole for passing the elastic shielding member from the shielding plate second surface side to the shielding plate first surface side,
The elastic shielding member is arranged in parallel to the movable direction of the shielding plate, and the surface that contacts the elastic shielding member and the light receiving surface through the hole is in contact with the elastic shielding member and the first surface of the shielding plate. The sheet feeding device is arranged so as to be flush with a surface to be touched, and one end of the elastic shielding member is in contact with the light receiving surface, and the other end is in contact with the first surface of the shielding plate. .
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CN106608553B (en) * | 2015-10-23 | 2022-11-01 | 杭州惠宝机电股份有限公司 | Double fan box adsorption paper feeding device that induced drafts |
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JPH05319582A (en) * | 1992-05-25 | 1993-12-03 | Ricoh Co Ltd | Paper feeder |
JPH10120212A (en) * | 1996-10-18 | 1998-05-12 | Canon Inc | Sheet feeding device |
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JP2006143399A (en) * | 2004-11-19 | 2006-06-08 | Ricoh Printing Systems Ltd | Paper feeding device |
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