JPH02209335A - Sheet feeder - Google Patents

Sheet feeder

Info

Publication number
JPH02209335A
JPH02209335A JP1027204A JP2720489A JPH02209335A JP H02209335 A JPH02209335 A JP H02209335A JP 1027204 A JP1027204 A JP 1027204A JP 2720489 A JP2720489 A JP 2720489A JP H02209335 A JPH02209335 A JP H02209335A
Authority
JP
Japan
Prior art keywords
sheet
elastic body
vibration
elastic bodies
elastic
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
JP1027204A
Other languages
Japanese (ja)
Inventor
Yoshibumi Nishimoto
義文 西本
Masahiko Igaki
正彦 井垣
Kenichi Kataoka
健一 片岡
Hiroyuki Seki
裕之 関
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP1027204A priority Critical patent/JPH02209335A/en
Publication of JPH02209335A publication Critical patent/JPH02209335A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00Feeding articles separated from piles; Feeding articles to machines
    • B65H5/008Feeding articles separated from piles; Feeding articles to machines using vibrations

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

PURPOSE:To make any sheet conveyable as well as to improve conveying force and efficiency at that time by installing an elastic body in which a part or all of the surface contacting with the sheet is roughed, and constituting a friction factor between the elastic body and the sheet so as to be larger. CONSTITUTION:Two elastic bodies 5, 6 are connected to a grounded circuit as an electric conductor, and frequency voltage is impressed on a vibrator 1 by a generator 7 whereby vibration is generated in these elastic bodies 5, 6. Vibrators 2, 4 generate power with the vibration, and when the electric energy is dissipated at an energy absorbing part 8, the vibration is not reflected and it comes to a progressive wave. When each bending vibration of these elastic bodies 5, 6 comes to the progressive wave, an outer part of bending has a velocity component in reverse to the forward direction of the progressive wave, feeding a sheet in reverse to the forward direction of the progressive wave. At this time, each surface of these elastic bodies 5, 6 is formed into a rough surface by means of honing or etching, etc., so that a friction factor between the elastic bodies 5, 6 and the sheet is increased, thus conveying force and its efficiency can be improved.

Description

【発明の詳細な説明】 (発明の利用分野) 本発明は、計算機、複写機、ファクシミリ、ワードプロ
セッサ、タイプライタ、その他シート類を送る機構を具
備する各種機械に備えられたシート送り装置に関するも
のである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a sheet feeding device installed in a computer, a copying machine, a facsimile machine, a word processor, a typewriter, and other various machines equipped with a mechanism for feeding sheets. be.

(発明の背景) 従来この種の装置は、特開昭59−477243号公報
に開示されているように、シートを挟持する弾性体に進
行波を形成し、該シートを送るように構成されていた。
(Background of the Invention) Conventionally, this type of device has been configured to feed the sheet by forming a traveling wave in an elastic body that clamps the sheet, as disclosed in Japanese Patent Laid-Open No. 59-477243. Ta.

ここで、前記提案におけるシート搬送原理について第3
図を用いて説明する。
Here, we will discuss the third principle of sheet conveyance in the above proposal.
This will be explained using figures.

弾性体11及び12により、シート13は適度の押圧で
挟持されている0弾性体11.12にはそれぞれ進行性
の曲げ振動(進行波)が形成されており、これら進行波
の位相差は空間的に180°になるように構成されてい
るので、それぞれの弾性体11.12の曲げ振動はシー
ト13側に各々の凸部分が常に対向するように進行する
。このとき、弾性体11.12の表面の、例えば凸部分
のある質点に注目すると、該質点は一般には楕円軌道を
描く運動をする。第3図中において、弾性体11につい
て言えば、進行波が右方向へ進む場合、上記質点は図に
示したように時計回りの楕円軌跡を描くことになる。し
たがって、凸部の質点の運動方向は弾性体11.12い
ずれも振動の進行方向とは逆方向となり、これがシート
13を移送する力として働くことになる。
The sheet 13 is held between the elastic bodies 11 and 12 with moderate pressure. Progressive bending vibrations (travelling waves) are formed in each of the elastic bodies 11 and 12, and the phase difference between these traveling waves is Since the bending vibration of each of the elastic bodies 11 and 12 advances so that the convex portions of the respective elastic bodies always face the sheet 13 side. At this time, if attention is paid to, for example, a mass point with a convex portion on the surface of the elastic body 11, 12, the mass point generally moves in an elliptical orbit. In FIG. 3, regarding the elastic body 11, when the traveling wave moves to the right, the mass point will draw a clockwise elliptical locus as shown in the figure. Therefore, the moving direction of the mass points of the convex portions of the elastic bodies 11 and 12 is opposite to the direction of vibration, and this acts as a force to transport the sheet 13.

一方、凹部においては、進行方向と同方向のシート移送
力が発生するが、凸部に比較して圧力が小さいので、シ
ート13と弾性体11.12の摩擦力は小さく、シート
移送力も小さくなるので、シート移送力の総和としては
、前述した曲げ。
On the other hand, in the concave portion, a sheet transporting force is generated in the same direction as the traveling direction, but the pressure is smaller than that in the convex portion, so the frictional force between the sheet 13 and the elastic body 11, 12 is small, and the sheet transporting force is also small. So, the total sheet transport force is the bending mentioned above.

振動の進行方向とは逆方向に働くことになる。It acts in the opposite direction to the direction of vibration.

第4図は前述の如きシート移送力を発生する装置の一例
を示すものであり、図中、11.12及び13は前述し
た弾性体及びシートである。又、14−1. 14−2
.15−1(不図示)、15−2は前記弾性体11.1
2上に固着された振動子、16は押圧支持部材、17−
1. 17−2は支持側板、18は底板である。
FIG. 4 shows an example of a device that generates the sheet conveying force as described above, and in the figure, reference numerals 11, 12 and 13 are the elastic body and sheet described above. Also, 14-1. 14-2
.. 15-1 (not shown) and 15-2 are the elastic bodies 11.1
A vibrator fixed on 2, 16 a pressing support member, 17-
1. 17-2 is a support side plate, and 18 is a bottom plate.

弾性体12は底板18により支持され、弾性体11は押
圧支持部材16により支持されている。
The elastic body 12 is supported by a bottom plate 18, and the elastic body 11 is supported by a pressing support member 16.

また該弾性体11は前記押圧支持部材13の有するバネ
性により、シート13を適当な力で押圧して前記弾性体
12と共に該シート13を挟持している0弾性体11.
12に各々の振動子にある周波電圧が印加されて振動が
加えられることにより、前述の如く各々の凸部が常に対
向するようになっているので、シート移送力が発生し、
図中矢印の方向へのシート搬送が行われる。尚図中矢印
は両方向を指しているが、これは振動の進行方向を切り
換えることによってシート搬送の方向を反転できること
を意味している。
Further, the elastic body 11 presses the sheet 13 with an appropriate force due to the spring properties of the pressing support member 13, and holds the sheet 13 together with the elastic body 12.
By applying a certain frequency voltage to each vibrator 12 and applying vibration, the respective convex portions are always facing each other as described above, so that a sheet conveying force is generated.
The sheet is conveyed in the direction of the arrow in the figure. Note that the arrows in the figure point in both directions, which means that the direction of sheet conveyance can be reversed by switching the direction of vibration.

第5図及び第6図は、振動体を別の構成により実現した
装置の一例(主要部分のみ示しである)を示すものであ
る。
FIGS. 5 and 6 show an example of a device (only the main parts are shown) in which the vibrating body is realized with a different configuration.

第5図はトラック状の振動子19−1. 19−2が固
着された同じくトラック状の弾性体20−1.20−2
によりシート13を挟持する構成であり、振動子19−
1. 19−2への周波電圧印加により弾性体20−1
.20−2に進行性の曲げ振動を形成するどとにより、
シート移送力を発生させる点は、前記第4図図示装置と
同様である。
FIG. 5 shows a track-shaped vibrator 19-1. Similarly track-shaped elastic body 20-1.20-2 to which 19-2 is fixed
The structure is such that the sheet 13 is held between the vibrator 19-
1. By applying a frequency voltage to 19-2, elastic body 20-1
.. By creating progressive bending vibration in 20-2,
The point of generating the sheet conveying force is similar to the apparatus shown in FIG. 4 above.

第6図は第5図図示装置のシート給送方向から見た断面
図で、左右で段差を設けている。これは、弾性体20−
1.20−2の左側と右側でシート移送力の方向が逆向
きに働いている為、逆向きとなる側(第6図中右側)の
移送力をシート13に働かせないようにするためである
FIG. 6 is a cross-sectional view of the apparatus shown in FIG. 5 as viewed from the sheet feeding direction, and there is a level difference on the left and right sides. This is the elastic body 20-
1. Since the direction of the sheet transport force is acting in opposite directions on the left and right sides of 20-2, this is to prevent the transport force on the opposite side (the right side in Figure 6) from acting on the sheet 13. be.

ところで、上記の様な従来装置においては、弾性体のシ
ートと接触する面は鏡面もしくはそれに準する面だった
ので、以下のような問題点を有していた。
By the way, in the conventional device as described above, the surface of the elastic body that comes into contact with the sheet is a mirror surface or a similar surface, and therefore has the following problems.

(1)シートとの摩擦係数が低く、よって移送力が小さ
く、且つ効率の面にも難があった。
(1) The friction coefficient with the sheet was low, so the transfer force was small, and there were also problems in terms of efficiency.

(2)シートが樹脂フィルム等の鏡面に近いものであっ
た場合、吸着現象を起こし、搬送不能になることがあっ
た。
(2) If the sheet is a resin film or other similar material, an adsorption phenomenon may occur and transport may become impossible.

(発明の目的) 本発明の目的は、上述した問題を解決し、どのようなシ
ートであっても搬送可能とすると共に、その時の移送力
及び効率を向上させることのできるシート送り装置を提
供することである。
(Object of the Invention) An object of the present invention is to provide a sheet feeding device that can solve the above-mentioned problems, can transport any kind of sheet, and can improve the transporting force and efficiency at the time. That's true.

(発明の特徴) 上記目的を達成するために、本発明は、シートと接触す
る面の、一部或は全部が粗面にされた弾性体を備え、以
て、該弾性体とシートとの摩擦係数を大きくするように
したことを特徴とする。
(Features of the Invention) In order to achieve the above object, the present invention includes an elastic body whose surface that comes into contact with the sheet is partially or completely roughened, so that the contact between the elastic body and the sheet is improved. It is characterized by an increased coefficient of friction.

(発明の実施例) 以下、本発明を図示の実施例に基づいて詳細に説明する
(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

第1図は本発明の一実施例を示すものであり、1.2,
3.4は圧電素子からなる振動子、5゜6はシート(不
図示)と接触する面が粗面にされた弾性体、7は周波電
圧を前記振動子1〜4に印加する発振器、8はエネルギ
ー吸収部である。
FIG. 1 shows an embodiment of the present invention, 1.2,
3.4 is a vibrator made of a piezoelectric element; 5.6 is an elastic body with a roughened surface in contact with a sheet (not shown); 7 is an oscillator that applies a frequency voltage to the vibrators 1 to 4; 8; is the energy absorbing part.

振動子1.2は弾性体5に接着剤等で固着されている。The vibrator 1.2 is fixed to the elastic body 5 with adhesive or the like.

同様に、振動子3.4は弾性体6に接着剤等で固着され
ている。また、弾性体5と6は適当な力で押えられてい
る。該実施例では、弾性体5と6が導電体として接地回
路に接続されており、発振器7により振動子1に周波電
圧(交流電界)を印加することにより該弾性体5と6に
振動が発生する。振動子2と4は前記弾性体5と6の振
動に伴い発電する。その発電された電気エネルギーは抵
抗などから成るエネルギー吸収部8により散逸させられ
る。よってその振動は反射されずに進行波となる。弾性
体5.6の曲げ振動が進行波となるとき、その表面の1
点に注目すると、その軌跡は前述したように楕円を描い
ている。したがって、曲げの外側の部分は常に進行波の
進行方向と逆向きの速度成分を持つことになり、シート
は常に曲げの外側の部分と接触するために、進行波の進
行方向とは逆向きに送られる。第1図においては、左か
ら右へシートは送られる。
Similarly, the vibrator 3.4 is fixed to the elastic body 6 with adhesive or the like. Further, the elastic bodies 5 and 6 are held down with an appropriate force. In this embodiment, the elastic bodies 5 and 6 are connected to a ground circuit as conductors, and vibration is generated in the elastic bodies 5 and 6 by applying a frequency voltage (alternating current electric field) to the vibrator 1 by an oscillator 7. do. The vibrators 2 and 4 generate electricity as the elastic bodies 5 and 6 vibrate. The generated electrical energy is dissipated by an energy absorbing section 8 made of a resistor or the like. Therefore, the vibration becomes a traveling wave without being reflected. When the bending vibration of the elastic body 5.6 becomes a traveling wave, 1 of the surface of the elastic body 5.6 becomes a traveling wave.
If you pay attention to the point, its trajectory will draw an ellipse as described above. Therefore, the outside part of the bend always has a velocity component in the opposite direction to the traveling direction of the traveling wave, and since the sheet is always in contact with the part outside the bend, it has a velocity component in the opposite direction to the traveling direction of the traveling wave. Sent. In FIG. 1, sheets are fed from left to right.

ところで、実験の結果より、以下に述べるようなシート
類、特に紙類等を搬送する場合には弾性体5.6の表面
が従来のように鏡面であることは好ましくないことが分
かった。そこで前述したように弾性体5と6の表面を、
ホーニング加工又はエツチング等によりを粗面とするこ
とにより、シートと弾性体5.6との摩擦係数が増大し
、移送力及びその効率が向上するという結果が得られた
。さらに、オーバーへッドブロジェクタで使用される透
明樹脂フィルムを搬送した場合、鏡面加工された従来の
様な弾性体ではシートと弾性体が吸着現象を起こし、搬
送不能になることがあったが、上記実施例装置により実
験を行ったところ、そのような現象は全く起きなかった
By the way, from the results of experiments, it has been found that it is not preferable for the surface of the elastic body 5.6 to have a mirror surface as in the past when conveying sheets such as those described below, especially papers. Therefore, as mentioned above, the surfaces of the elastic bodies 5 and 6 are
By roughening the surface by honing or etching, the coefficient of friction between the sheet and the elastic body 5.6 was increased, and the transfer force and its efficiency were improved. Furthermore, when transporting a transparent resin film used in an overhead projector, a conventional mirror-finished elastic body would cause an adhesion phenomenon between the sheet and the elastic body, making it impossible to convey the film. When we conducted an experiment using the example device, no such phenomenon occurred.

第2図は本発明の別の実施例を示すものであり、弾性体
9.10に振動効果を得る為の振動片9a、10aが設
けられており、その振動片のシートと接触する面を粗面
にし、同様の効果を得るようにしている。その他の部分
については第1図実施例と全く同様であるので、その詳
細については省略する。
FIG. 2 shows another embodiment of the present invention, in which an elastic body 9.10 is provided with vibrating pieces 9a and 10a for obtaining a vibration effect, and the surfaces of the vibrating pieces that come into contact with the sheet are shown. The surface is roughened to achieve the same effect. Since the other parts are completely the same as the embodiment shown in FIG. 1, the details thereof will be omitted.

本実施例によれば、シートが接触する弾性体5.6、或
は9.10の面を粗面にしている為、移送力及びその効
率が共に向上し、更に吸着現象によるシート搬送不能と
なることを防止することが可能となる。
According to this embodiment, since the surface of the elastic body 5.6 or 9.10 with which the sheet comes into contact is roughened, both the conveying force and its efficiency are improved, and furthermore, the sheet cannot be conveyed due to the adsorption phenomenon. It is possible to prevent this from happening.

(変形例) 本実施例では、弾性体の表面にホーニング加工又はエツ
チング等によりを粗面を形成したが、搬送方向と直交す
る方向に多数の溝を形成しても同様の効果が得られる。
(Modification) In this embodiment, a rough surface was formed on the surface of the elastic body by honing or etching, but the same effect can be obtained by forming a large number of grooves in a direction perpendicular to the conveyance direction.

さらに、多孔質或はボアの多い材料を用いても同様の効
果を得ることができる。
Furthermore, similar effects can be obtained by using porous or porous materials.

(発明の効果) 以上説明したように、本発明によれば、シートと接触す
る面の、一部或は全部が粗面にされた弾性体を備え、以
て、該弾性体とシートとの摩擦係数を大きくするように
したから、どのようなシートであっても搬送可能とする
と共に、その時の移送力及び効率を向上させることがで
きる。
(Effects of the Invention) As explained above, according to the present invention, the elastic body is provided with a part or all of the surface in contact with the sheet being roughened, so that the contact between the elastic body and the sheet is improved. Since the coefficient of friction is increased, any type of sheet can be conveyed, and the conveying force and efficiency at that time can be improved.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例を示す側面図、第2図は本発
明の他の実施例を示す側面図、第3図は第1図 図、第5図は同じく他の従来装置の構成例を示す斜視図
、第6図は第5図シート給送方向よりの断面図である。 1.2,3.4・・・・・・振動子、5.6・・・・・
・弾性体、7・・・・・・発振器、8・・・・・・エネ
ルギー吸収部、91o・・・・・・弾性体。
FIG. 1 is a side view showing one embodiment of the present invention, FIG. 2 is a side view showing another embodiment of the present invention, FIG. 3 is the same as FIG. 1, and FIG. 5 is a side view of another conventional device. FIG. 6 is a perspective view showing a configuration example, and FIG. 6 is a sectional view taken from the sheet feeding direction of FIG. 1.2, 3.4... vibrator, 5.6...
- Elastic body, 7... Oscillator, 8... Energy absorption section, 91o... Elastic body.

Claims (1)

【特許請求の範囲】[Claims] (1)シートと接触する面の、一部或は全部が粗面にさ
れた弾性体と、該弾性体に固着される振動子と、該振動
子に周波電圧を印加して前記弾性体に進行波を形成し、
前記弾性体面に押圧されるシートに移送力を与えて搬送
させるシート搬送手段とを備えたシート送り装置。
(1) An elastic body whose surface that comes into contact with the sheet is partially or completely roughened, a vibrator fixed to the elastic body, and a frequency voltage applied to the vibrator to cause the elastic body to forming a traveling wave,
A sheet feeding device comprising: a sheet conveying means for conveying the sheet by applying a conveying force to the sheet pressed against the elastic body surface.
JP1027204A 1989-02-06 1989-02-06 Sheet feeder Pending JPH02209335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1027204A JPH02209335A (en) 1989-02-06 1989-02-06 Sheet feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1027204A JPH02209335A (en) 1989-02-06 1989-02-06 Sheet feeder

Publications (1)

Publication Number Publication Date
JPH02209335A true JPH02209335A (en) 1990-08-20

Family

ID=12214571

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1027204A Pending JPH02209335A (en) 1989-02-06 1989-02-06 Sheet feeder

Country Status (1)

Country Link
JP (1) JPH02209335A (en)

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