JPH05330680A - Sheet conveyor device - Google Patents
Sheet conveyor deviceInfo
- Publication number
- JPH05330680A JPH05330680A JP4184808A JP18480892A JPH05330680A JP H05330680 A JPH05330680 A JP H05330680A JP 4184808 A JP4184808 A JP 4184808A JP 18480892 A JP18480892 A JP 18480892A JP H05330680 A JPH05330680 A JP H05330680A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- paper
- preventing member
- double
- sheet conveying
- 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
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ファクシミリ装置ある
いはプリンタ装置に適用されて好適な用紙搬送装置に関
し、特に複数枚同時に送られるいわゆる重送を防止して
１枚づつ用紙を搬送する搬送装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying apparatus suitable for being applied to a facsimile apparatus or a printer apparatus, and more particularly to a conveying apparatus for conveying a sheet one by one while preventing so-called double feeding in which a plurality of sheets are simultaneously fed. ..
【０００２】[0002]
【従来の技術】従来、この種の用紙搬送装置では、搬送
ローラに重送防止部材を所定の負荷を有して当接させ、
搬送ローラ、用紙および重送防止部材間に生じる摩擦力
の違いによって、用紙の重送を防止していた。これを図
に基づいて説明する。図７は従来の用紙搬送装置の側面
図である。同図において、２は硬質ゴムからなる搬送ロ
ーラ、３は用紙４を搬送ローラ２に導く用紙ガイド、６
は用紙押え板、７は先端が搬送ローラ２の表面に負荷Ｐ
を有して当接しているセパレータゴムの重送防止部材で
ある。2. Description of the Related Art Conventionally, in this type of sheet conveying apparatus, a double feed preventing member is brought into contact with a conveying roller with a predetermined load.
Due to the difference in frictional force generated between the conveying roller, the paper and the double feed preventing member, the double feed of the paper is prevented. This will be described with reference to the drawings. FIG. 7 is a side view of a conventional sheet conveying device. In the figure, 2 is a conveying roller made of hard rubber, 3 is a sheet guide for guiding the sheet 4 to the conveying roller 2, and 6 is a sheet guide.
Is a paper pressing plate, and 7 is a load P on the front surface of the conveying roller 2
And a separator rubber double feed preventing member which is in contact with and is in contact with.
【０００３】そして、これら３者間の摩擦力、すなわち
搬送ローラと用紙間の摩擦力をＧ、セパレータゴムと用
紙間の摩擦力をＦ、用紙間の摩擦力をｆとすると、Ｇ＞
Ｆ＞ｆの関係となるように各部材の材質を選択してい
る。これにより、１枚目の用紙を搬送ローラ２によって
搬送し、２枚目以降の用紙を重送防止部材７によって、
搬送を阻止し、用紙を１枚づつ搬送して、重送を防止し
ている。When the frictional force between these three members, that is, the frictional force between the conveying roller and the paper is G, the frictional force between the separator rubber and the paper is F, and the frictional force between the papers is f, G>
The material of each member is selected so that F> f. As a result, the first sheet is conveyed by the conveying roller 2, and the second and subsequent sheets are conveyed by the double feed prevention member 7.
The conveyance is blocked, and the sheets are conveyed one by one to prevent double feeding.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記し
た従来の用紙搬送構造においては、温度あるいは湿度等
の外部環境条件が変化すると、当初の設計条件である各
部材間の摩擦係数が変動し、これにともない各部材間の
摩擦力も変動し、特にｆがＦよりも大きくなって、重送
が発生してしまう。これを解消するには、予め、Ｆおよ
びＧを大きくするようにセパレータゴムと搬送ローラと
の材質を選択すればよいが、このようにすると用紙の取
り残し、すなわちピックミスが発生するという相反する
問題があった。また、ＦとＧを大きくすると、搬送ロー
ラの駆動モータの負荷も大きくなり、電力の消費も大き
くなってしまうという欠点があった。However, in the above-described conventional sheet conveying structure, when the external environmental conditions such as temperature or humidity change, the friction coefficient between the respective members, which is the original design condition, changes. Along with this, the frictional force between the respective members also fluctuates, and in particular f becomes larger than F, causing double feeding. To solve this, the materials of the separator rubber and the conveying roller may be selected in advance so as to increase F and G. However, this causes a conflicting problem that the paper is left behind, that is, a pick mistake occurs. there were. Further, when F and G are increased, the load on the drive motor of the conveying roller also increases, and the power consumption also increases.
【０００５】したがって、本発明は上記した従来の問題
点あるいは欠点に鑑みてなされたものであり、その第１
の目的とするところは、駆動モータの負荷を大きくせず
に、確実に重送を防止する用紙搬送装置を提供すること
にある。また、第２の目的をするところは、外部の環境
条件に対応し、確実に重送を防止する用紙搬送装置を提
供することにある。Therefore, the present invention has been made in view of the above-mentioned problems and drawbacks of the prior art.
It is an object of the present invention to provide a sheet conveying device that reliably prevents double feeding without increasing the load on the drive motor. Another object of the present invention is to provide a sheet conveying device that can cope with external environmental conditions and reliably prevent double feeding.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
に、本発明に係る用紙搬送装置は、用紙を搬送する搬送
ローラと、この搬送ローラの表面に負荷を有して当接し
て２枚目以降の用紙の搬送を阻止する用紙押え板とから
なる用紙搬送装置において、前記用紙押え板に搬送ロー
ラと接する重送防止部材を設けると共に、電圧を印可す
ることにより厚み方向に撓み振動を行う圧電素子を固着
したものである。また、本発明に係る用紙搬送装置は、
前記圧電素子への交流電圧の印加をＯＮ、ＯＦＦさせた
ものである。また、本発明に係る用紙搬送装置は、外部
環境条件の変化に対応して前記圧電素子の振動の振幅を
変化させたものである。また、本発明に係る用紙搬送装
置は、前記重送防止部材をシリコンとしたものである。In order to achieve this object, a sheet conveying apparatus according to the present invention comprises a conveying roller for conveying a sheet and two sheets which are in contact with the surface of the conveying roller with a load. In a paper conveying device including a paper pressing plate for preventing the conveyance of paper from the eyes onward, a multi-feed preventing member that is in contact with the conveying roller is provided on the paper pressing plate, and bending vibration is performed in the thickness direction by applying a voltage. The piezoelectric element is fixed. In addition, the sheet conveying device according to the present invention,
The application of an alternating voltage to the piezoelectric element is turned on and off. Further, the sheet conveying device according to the present invention changes the amplitude of vibration of the piezoelectric element in response to changes in external environmental conditions. Further, in the paper feeding device according to the present invention, the double feed preventing member is made of silicon.
【０００７】[0007]
【作用】本発明によれば、圧電素子を印可することによ
り、用紙押え板が振動し、これにより重送防止部材、用
紙および搬送ローラが振動して、特に高温多湿時に摩擦
力が増大する用紙間の摩擦力が低下する。また、圧電素
子への交流電圧の印加をＯＮ、ＯＦＦさせることによ
り、瞬間的に重送防止部材と用紙との間の摩擦力の低下
が緩和される。また、圧電素子の振幅が大小変化するこ
とにより、重送防止部材と用紙との摩擦力が変化する。According to the present invention, when the piezoelectric element is applied, the sheet pressing plate vibrates, which causes the double feed preventing member, the sheet and the conveying roller to vibrate, and the frictional force increases especially at high temperature and high humidity. The frictional force between them decreases. Further, by turning on / off the application of the AC voltage to the piezoelectric element, the reduction of the frictional force between the double feed preventing member and the paper is alleviated instantaneously. Further, the frictional force between the double feed prevention member and the paper changes as the amplitude of the piezoelectric element changes.
【０００８】[0008]
【実施例】以下、本発明の実施例を図に基づいて説明す
る。図１は本発明に係る用紙搬送装置の側面図である。
これらの図において、従来技術と同一の構成については
同一の符号を付しており、詳細な説明は省略する。本発
明の特徴とするところは、重送防止部材７が貼り付けら
れた反対側の用紙押え板６の根元部分に、厚み方向に分
極処理が施され、電圧を印加させると厚み方向に撓み振
動を行う圧電セラミックス８を貼着した点にある。圧電
セラミックス８に交流電圧を印可させると、圧電セラミ
ックス８が振動し、これにより用紙押え板６が振動し、
この振動は重送防止部材７から用紙４に伝達されて、振
動する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a sheet conveying device according to the present invention.
In these figures, the same components as those of the conventional technique are designated by the same reference numerals, and detailed description thereof will be omitted. The feature of the present invention is that the base portion of the sheet pressing plate 6 on the opposite side to which the multi-feed preventing member 7 is attached is polarized in the thickness direction, and when a voltage is applied, bending vibration occurs in the thickness direction. The point is that the piezoelectric ceramics 8 for performing is attached. When an alternating voltage is applied to the piezoelectric ceramics 8, the piezoelectric ceramics 8 vibrates, which causes the paper pressing plate 6 to vibrate.
This vibration is transmitted from the double feed preventing member 7 to the paper 4 and vibrates.
【０００９】図２は重送防止部材７と搬送ローラ２との
間に用紙４を５枚はさみ、用紙押え板６を２．９４Ｎの
加圧力で搬送ローラ２に押し付け、搬送ローラ２を停止
したままの状態での常温常湿時と高温高湿時（３５℃、
８５％ＲＨ）における無振動状態（０Ｖ）と振動状態
（１５ＶOr２０Ｖ）での各用紙の引張り力を測定した結
果の表とグラフである。ここで、用紙の一番下の搬送ロ
ーラ２と接している用紙を１枚目とし、順次２枚目、３
枚目、とし、一番上の重送防止部材７と接している用紙
を５枚目としている。重送防止部材７にはシリコンを採
用している。In FIG. 2, five sheets of paper 4 are sandwiched between the double feed preventing member 7 and the conveying roller 2, the sheet pressing plate 6 is pressed against the conveying roller 2 with a pressing force of 2.94 N, and the conveying roller 2 is stopped. Normal temperature and normal humidity and high temperature and high humidity (35 ℃,
It is a table and a graph of the result of having measured the pulling force of each paper in a non-vibration state (0V) and a vibration state (15VOr20V) in 85% RH. Here, the first sheet is the sheet that is in contact with the lowermost conveyance roller 2 of the sheet, and the second sheet and the third sheet are sequentially arranged.
The fifth sheet is the sheet that is in contact with the uppermost double-feed preventing member 7. Silicon is used for the double feed prevention member 7.
【００１０】これらの表、図面からわかるように、高
温、高湿になると用紙同士の摩擦力が増加して重送しや
すくなる。また、圧電セラミックス８を振動させた場
合、２、３および４枚目の用紙間の引抜き力が小さくな
り、特に、高温、高湿時において顕著である。しかも
１、５枚目での落ち込みは少ない。これらのことから、
用紙押え部材６を振動させることにより、特に高温高湿
時に用紙４と搬送ローラ２間および重送防止部材７間の
摩擦力が低下すると共に、用紙４間同士の摩擦力が、そ
れ以上に大幅に低下することがわかる。このことから、
用紙押え部材６を振動させることにより、２枚目以降の
用紙が重送されることが防止され、１枚目の用紙のみが
搬送される。そして、特に従来重送が発生しやすかった
高温高湿時において、重送防止に効果があることがわか
る。As can be seen from these tables and drawings, when the temperature and humidity are high, the frictional force between the sheets increases and it becomes easy to perform double feeding. Further, when the piezoelectric ceramics 8 is vibrated, the pulling force between the second, third and fourth sheets becomes small, which is particularly remarkable at high temperature and high humidity. Moreover, there is little drop in the first and fifth sheets. from these things,
By vibrating the paper pressing member 6, the frictional force between the paper 4 and the transport roller 2 and between the double feed preventing member 7 is reduced particularly at high temperature and high humidity, and the frictional force between the papers 4 is further increased. It can be seen that it drops to. From this,
By vibrating the sheet pressing member 6, it is possible to prevent the second and subsequent sheets from being double-fed, and only the first sheet is conveyed. Further, it can be seen that there is an effect in preventing double feed, especially at high temperature and high humidity where double feed is likely to occur conventionally.
【００１１】これは、用紙押え部材に振動を与えること
によって、用紙４間に断続的に隙間が生じて、この結果
用紙４間の摩擦力が低下するものである。ところで、用
紙押え部材６に振動を与えることによって、上述したよ
うに、５枚目の用紙（図１においては重送防止部材７と
接触している最上位の用紙４ｃに相当する）と重送防止
部材７との間の摩擦力も低下し、温湿度の外部条件が種
々変化して、この摩擦力の低下により、この最上位の用
紙４ｃが重送される場合が生じる。This is because when the paper pressing member is vibrated, gaps are intermittently formed between the papers 4 and, as a result, the frictional force between the papers 4 is reduced. By vibrating the sheet pressing member 6, as described above, the fifth sheet (corresponding to the uppermost sheet 4c in contact with the double sheet feeding preventing member 7) and the double sheet are fed. The frictional force with the prevention member 7 is also reduced, the external conditions of temperature and humidity are variously changed, and the reduction of this frictional force may cause the uppermost sheet 4c to be double-fed.
【００１２】そこで、これを防止するために、本発明の
第２の実施例として、圧電セラミックス８への交流電圧
印加をＯＮ、ＯＦＦさせ、用紙押え部材６の振動を断続
的に停止させている。このような構成とすることによ
り、用紙押え部材６の重送防止部材７と用紙４ｃとの摩
擦力の低下を緩和して、用紙４ｃの重送を防止すること
が可能となる。この場合、ＯＦＦ状態をＯＮ状態の時間
よりも短くして、用紙押え部材６の振動停止時間を瞬間
的とすることが、用紙４間の間の摩擦力を低下させるこ
とがなく、用紙４間の間の重送防止を妨げることがな
い。このＯＦＦ状態の時間は、そのときの外部環境に応
じて長さを可変できることは勿論である。Therefore, in order to prevent this, as a second embodiment of the present invention, the application of an AC voltage to the piezoelectric ceramics 8 is turned on and off to intermittently stop the vibration of the sheet pressing member 6. .. With such a configuration, it is possible to mitigate the reduction in the frictional force between the double feed preventing member 7 of the paper pressing member 6 and the paper 4c and prevent the double feeding of the paper 4c. In this case, by making the OFF state shorter than the ON state time and making the vibration stopping time of the sheet pressing member 6 instantaneous, the friction force between the sheets 4 is not reduced, and It does not hinder the prevention of double feed during the period. It goes without saying that the length of the OFF state time can be changed according to the external environment at that time.
【００１３】ところで、圧電セラミックス８に電圧を印
加させると、図３に示すように用紙押え板６の先端は振
幅Ｌを有して振動する。振幅Ｌの大きさは、印加する電
圧の大小によって制御され、また、振動周波数は印加す
る電圧の周波数によって決まる。重送防止部材７と用紙
４との間に生じる摩擦力Ｆは、重送防止部材７が静止状
態にあるとき最も大きく、重送防止部材７と用紙４とが
接触、離間を繰り返す状態が発生すると、静摩擦状態か
ら動摩擦状態に移行し、摩擦力が小さくなる。しかも、
離間状態が接触状態よりも長くなればなるほど、より小
さくなる。By the way, when a voltage is applied to the piezoelectric ceramics 8, the front end of the paper pressing plate 6 vibrates with an amplitude L as shown in FIG. The magnitude of the amplitude L is controlled by the magnitude of the applied voltage, and the vibration frequency is determined by the frequency of the applied voltage. The frictional force F generated between the multi-feed preventing member 7 and the sheet 4 is the largest when the multi-feed preventing member 7 is in a stationary state, and a state occurs in which the double-feed preventing member 7 and the sheet 4 repeatedly contact and separate. Then, the static friction state is changed to the dynamic friction state, and the friction force is reduced. Moreover,
The longer the separation state is than the contact state, the smaller the separation state is.
【００１４】図４に示すように、重送防止部材７の振幅
Ｌを大きくすると、用紙４ｂが二点鎖線で示した位置か
ら実線で示した位置に復帰するまでに時間を要し、それ
だけ用紙４ｂは、重送防止部材７と接触している時間が
離間している時間よりも短くなり、摩擦力Ｆが小さくな
る。したがって、重送防止部材７と用紙４ｂ間の摩擦力
Ｆの大小は、重送防止部材７の振幅Ｌの大きさによって
決まり、振幅Ｌは圧電セラミックス８に印加する電圧の
大きさによって制御されるので、摩擦力Ｆは圧電セラミ
ックス８に印加する電圧を制御することによって、可変
することができる。As shown in FIG. 4, when the amplitude L of the double feed preventing member 7 is increased, it takes time for the paper 4b to return from the position shown by the chain double-dashed line to the position shown by the solid line, and that much paper. 4b, the contact time with the double feed prevention member 7 becomes shorter than the separated time, and the frictional force F becomes smaller. Therefore, the magnitude of the frictional force F between the double feed prevention member 7 and the sheet 4b is determined by the magnitude of the amplitude L of the double feed prevention member 7, and the amplitude L is controlled by the magnitude of the voltage applied to the piezoelectric ceramics 8. Therefore, the frictional force F can be varied by controlling the voltage applied to the piezoelectric ceramics 8.
【００１５】本発明の第３の実施例は、この点に注目
し、図５（ａ）に示すように、重送防止部材と用紙間の
摩擦力Ｆが初期設定時において予め大きくなるように重
送防止部材の材質を選択してある。この状態において
は、用紙押え板６に負荷ｐが加わっているときにＦ1が
Ｇ1とほぼ同一の大きさとなり、用紙の取り残し、いわ
ゆるピックミスが生じる。したがって、常温常湿時にお
いては、圧電セラミックス８に電圧を印加し重送防止部
材７を振動させて、図５（ｂ）に示すように摩擦力Ｆを
初期設定時よりも低下させる。これによりＧ1に対して
Ｆ2を充分に低くして、ピックミスを防止する。また、
このときＦ2はｆ2よりも充分に大きくしてあるので、用
紙の重送が生じることはない。In the third embodiment of the present invention, paying attention to this point, as shown in FIG. 5A, the frictional force F between the multi-feed preventing member and the paper is increased in advance at the time of initial setting. The material of the double feed preventing member is selected. In this state, when the load p is applied to the paper pressing plate 6, F 1 becomes almost the same size as G 1, and the paper is left behind, so-called pick error occurs. Therefore, at room temperature and normal humidity, a voltage is applied to the piezoelectric ceramics 8 to vibrate the double-feed preventing member 7 to reduce the frictional force F as compared with the initial setting as shown in FIG. 5B. This makes F 2 sufficiently lower than G 1 to prevent picking mistakes. Also,
At this time, since F 2 is made sufficiently larger than f 2 , double feeding of paper does not occur.
【００１６】次に、外部環境が変化して高温高湿になる
と、用紙４間の摩擦係数が高くなり、このためｆが大き
くなり、ｆ3がＦ2に近接して用紙の重送が発生し易い状
態となる。この状態になると、図示しない検知手段によ
って、高温高湿状態を検知して、圧電セラミックス８に
印加している電圧を下げるように制御する。これによ
り、重送防止部材７の振動の振幅Ｌが小さくなり、重送
防止部材７と用紙４間の摩擦力Ｆは大きくなり、図５
（ｃ）に示すように初期設定時に近づいて、Ｆ3がｆ3よ
りも充分に大きくなり用紙４の重送は防止される。電圧
の下げ幅は、高温高湿状態の程度によって、Ｆ3とｆ3と
の差が適正の幅となるように制御される。Next, when the external environment is changed to high temperature and high humidity, the coefficient of friction between the sheets 4 becomes high, so that f becomes large and f 3 comes close to F 2 to cause double feeding of sheets. It becomes easy to do. In this state, the detection means (not shown) detects a high temperature and high humidity state and controls so that the voltage applied to the piezoelectric ceramics 8 is lowered. As a result, the amplitude L of the vibration of the multi-feed preventing member 7 is reduced, and the frictional force F between the multi-feed preventing member 7 and the sheet 4 is increased.
As shown in (c), when approaching the initial setting, F 3 becomes sufficiently larger than f 3 , and double feeding of the paper 4 is prevented. The voltage reduction range is controlled so that the difference between F 3 and f 3 is an appropriate range depending on the degree of high temperature and high humidity.
【００１７】なお、外部環境として、温度および湿度を
検知する方法を挙げたが、これに限定されることなく、
用紙の重送に関係する他の外部環境を検知して圧電セラ
ミックスを制御してもよいことは勿論である。また、Ｆ
の大きさを変化させるために、重送防止部材７の振動の
振幅Ｌのみを制御したが、重送防止部材７の振動の周波
数の変化を組み合わせることにより、より効果が高ま
る。Although a method of detecting temperature and humidity is given as the external environment, the present invention is not limited to this.
Of course, the piezoelectric ceramics may be controlled by detecting another external environment related to the double feeding of the sheets. Also, F
Although only the amplitude L of the vibration of the multi-feed preventing member 7 was controlled in order to change the magnitude of, the effect is further enhanced by combining the change in the frequency of the vibration of the multi-feed preventing member 7.
【００１８】図６は本発明の第４の実施例をとして、重
送防止部材７の材質をシリコン、ネオプレンおよびウレ
タンを採用した場合の用紙４の１枚目、２枚目および３
枚目の摩擦力を用紙押え板６に振動を付与した場合、し
ない場合との比較を測定した結果の表とグラフである。
この測定の結果から、ネオプレンは１枚目が大きく減少
し、２枚目および３枚目の減少は少なく、減少幅は同程
度である。ウレタンは、１枚目および２枚目が大きく減
少し、３枚目の減少は少ない。これらに対して、シリコ
ンは、１枚目および３枚目の減少が少なく、かつ２枚目
の減少が大きくなり、重送防止部材の材質として他の２
部材よりも良好であることがわかる。FIG. 6 shows a fourth embodiment of the present invention in which the first, second, and third sheets of paper 4 are used when the material of the double feed prevention member 7 is silicon, neoprene, or urethane.
9 is a table and a graph of the results of comparison between the case where the first sheet friction plate 6 is vibrated and the case where it is not vibrated.
From the results of this measurement, neoprene showed a large decrease in the first sheet, a small decrease in the second sheet and the third sheet, and the extent of decrease was almost the same. For urethane, the first and second sheets showed a large decrease, and the third sheet showed a small decrease. On the other hand, in the case of silicon, the decrease in the first and third sheets is small, and the decrease in the second sheet is large.
It can be seen that it is better than the member.
【００１９】なお、本実施例では、重送防止部材７を用
紙押え板６の搬送ローラ２側に貼り付け、圧電セラミッ
クス８をその反対側に固着しているが、これに限定され
ず、重送防止部材７を圧電セラミックス８側に貼り付け
てもいいし、圧電セラミックス８を搬送ローラ２側に固
着しても、上述した同一の作用効果が得られることは勿
論である。In this embodiment, the double feed prevention member 7 is attached to the side of the sheet pressing plate 6 on the conveying roller 2 and the piezoelectric ceramics 8 is fixed to the opposite side. However, the present invention is not limited to this. Needless to say, even if the feed preventing member 7 is attached to the piezoelectric ceramics 8 side or the piezoelectric ceramics 8 is fixed to the conveying roller 2 side, the same effect as described above can be obtained.
【００２０】[0020]
【発明の効果】以上説明したように本発明によれば、用
紙押え板に搬送ローラと接する重送防止部材を設けると
共に、電圧を印可することにより厚み方向に撓み振動を
行う圧電素子を固着し、用紙押え板を振動させることに
より用紙間に隙間を発生させて、用紙間の間の摩擦力を
減少させたので、重送防止部材による重送防止が確実に
行われる。しかも、重送防止部材に圧電素子を固着する
という極めて簡単な構造によって行うことができ、この
ため安価で、かつ小型の装置を提供できる効果がある。As described above, according to the present invention, the sheet pressing plate is provided with the double feed preventing member which is in contact with the conveying roller, and the piezoelectric element for bending and vibrating in the thickness direction is fixed by applying the voltage. Since the gap between the sheets is generated by vibrating the sheet pressing plate and the frictional force between the sheets is reduced, the double feeding prevention member surely prevents the double feeding. In addition, it can be performed by an extremely simple structure in which the piezoelectric element is fixed to the double feed preventing member, and therefore, there is an effect that an inexpensive and small device can be provided.
【００２１】また、圧電素子への交流電圧の印加をＯ
Ｎ、ＯＦＦさせ、断続的に用紙押え板の振動を停止させ
て重送防止部材とこれに接触している最上位の用紙との
摩擦力が振動によって減少するのを緩和したので、最上
位の用紙は確実に重送防止部材によって搬送が防止され
る。また、圧電素子の振幅を外部環境条件の変化に対応
して変化させるようにしたので、重送防止部材と用紙間
の摩擦力を外部環境条件の変化により変動する用紙間の
摩擦力と常に一定の差を有するように制御でき、このた
め外部環境条件の変化に対しても重送を防止できる。Further, the application of AC voltage to the piezoelectric element
Since the vibration of the sheet pressing plate is stopped intermittently by N and OFF to reduce the reduction of the frictional force between the double feed prevention member and the uppermost sheet in contact with it due to the vibration, The sheet is surely prevented from being conveyed by the double feed prevention member. Also, since the amplitude of the piezoelectric element is changed in response to changes in external environmental conditions, the frictional force between the double feed prevention member and the paper is always the same as the frictional force between the paper that changes due to changes in the external environmental conditions. Therefore, it is possible to prevent the double feed even when the external environmental conditions change.
【図１】本発明に係る用紙搬送装置の側面図である。FIG. 1 is a side view of a sheet conveying device according to the present invention.
【図２】本発明に係る用紙搬送装置における用紙押え板
に振動を付与した場合、付与しない場合との各用紙の引
抜き力の比較を示し、（ａ）は表であり、（ｂ）はグラ
フである。2A and 2B show a comparison of pulling-out force of each sheet with and without vibration applied to the sheet pressing plate in the sheet conveying apparatus according to the present invention, FIG. 2A is a table, and FIG. Is.
【図３】本発明に係る用紙搬送装置の第３の実施例を示
す要部動作図である。FIG. 3 is a principal part operation view showing a third embodiment of the sheet conveying device according to the present invention.
【図４】本発明に係る用紙搬送装置の第３の実施例を示
す要部の詳細動作図である。FIG. 4 is a detailed operation diagram of essential parts showing a third embodiment of the sheet transporting device according to the invention.
【図５】本発明に係る用紙搬送装置の第３の実施例にお
ける搬送ローラ、重送防止部材および用紙間の摩擦力の
変化図である。FIG. 5 is a change diagram of a frictional force between a conveyance roller, a double feed prevention member, and a sheet in a third example of the sheet conveyance device according to the present invention.
【図６】本発明に係る用紙搬送装置の第４の実施例を示
し、重送防止部材の材質の違いによる用紙押え板に振動
を付与した場合、付与しない場合との各用紙の引抜き力
の比較を示し、（ａ）は表であり、（ｂ）はグラフであ
る。FIG. 6 shows a fourth embodiment of the paper feeding apparatus according to the present invention, showing the pulling force of each paper when vibration is applied to the paper pressing plate due to the difference in material of the double feed prevention member and when it is not applied. A comparison is shown, (a) is a table and (b) is a graph.
【図７】従来の用紙搬送装置の側面図である。FIG. 7 is a side view of a conventional sheet conveying device.
２ 搬送ローラ ３ 用紙ガイド ４ 用紙 ６ 用紙押え板 ７ 重送防止部材 ８ 圧電セラミックス 2 Transport rollers 3 Paper guide 4 Paper 6 Paper retainer plate 7 Double feed prevention member 8 Piezoelectric ceramics
【手続補正書】[Procedure amendment]
【提出日】平成５年４月２０日[Submission date] April 20, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図２[Name of item to be corrected] Figure 2
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図２】本発明に係る用紙搬送装置における用紙押え板
に振動を付与した場合、付与しない場合との各用紙の引
抜き力の比較を示し、（ａ）は図表であり、（ｂ）はグ
ラフである。[2] When applying vibration to the paper pressing plate in the sheet conveying apparatus according to the present invention, shows a comparison of pull-out force of the paper and if not granted, a (a) is Chart, (b) is It is a graph.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図６[Name of item to be corrected] Figure 6
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図６】本発明に係る用紙搬送装置の第４の実施例を示
し、重送防止部材の材質の違いによる用紙押え板に振動
を付与した場合、付与しない場合との各用紙の引抜き力
の比較を示し、（ａ）は図表であり、（ｂ）はグラフで
ある。FIG. 6 shows a fourth embodiment of the paper feeding apparatus according to the present invention, showing the pulling force of each paper when vibration is applied to the paper pressing plate due to the difference in material of the double feed prevention member and when it is not applied. shows the comparison, (a) is a diagram table, (b) it is a graph.
Claims (4)
ローラの表面に負荷を有して当接して２枚目以降の用紙
の搬送を阻止する用紙押え板とからなる用紙搬送装置に
おいて、前記用紙押え板に搬送ローラと接する重送防止
部材を設けると共に、電圧を印可することにより厚み方
向に撓み振動を行う圧電素子を固着したことを特徴とす
る用紙搬送装置。1. A paper transporting apparatus comprising: a transport roller for transporting a paper; and a paper retainer plate having a load on the surface of the transport roller and abutting against the surface of the transport roller to prevent the transport of the second and subsequent sheets of paper. A sheet conveying device, comprising: a sheet pressing plate provided with a double feed preventing member that is in contact with a conveying roller; and a piezoelectric element that flexibly vibrates in the thickness direction when a voltage is applied.
前記圧電素子への交流電圧の印加をＯＮ、ＯＦＦさせた
ことを特徴とする用紙搬送装置。2. The sheet conveying apparatus according to claim 1,
A sheet conveying device, wherein application of an alternating voltage to the piezoelectric element is turned on and off.
外部環境条件の変化に対応して前記圧電素子の振動の振
幅を変化させたことを特徴とする用紙搬送装置。3. The sheet conveying apparatus according to claim 1,
A sheet conveying device, wherein the amplitude of vibration of the piezoelectric element is changed in response to changes in external environmental conditions.
前記重送防止部材をシリコンとしたことを特徴とする用
紙搬送装置。4. The sheet conveying apparatus according to claim 1,
A sheet conveying device, wherein the double feed preventing member is made of silicon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4184808A JPH05330680A (en) | 1991-08-29 | 1992-06-19 | Sheet conveyor device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24244791 | 1991-08-29 | ||
| JP3-242447 | 1991-08-29 | ||
| JP4184808A JPH05330680A (en) | 1991-08-29 | 1992-06-19 | Sheet conveyor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05330680A true JPH05330680A (en) | 1993-12-14 |
Family
ID=17089233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4184808A Pending JPH05330680A (en) | 1991-08-29 | 1992-06-19 | Sheet conveyor device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05330680A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015054732A (en) * | 2013-09-10 | 2015-03-23 | 株式会社サム技研Ｉｉ | Sheet feeder |
-
1992
- 1992-06-19 JP JP4184808A patent/JPH05330680A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015054732A (en) * | 2013-09-10 | 2015-03-23 | 株式会社サム技研Ｉｉ | Sheet feeder |
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