JPH0331137A - Sheet feeder - Google Patents
Sheet feederInfo
- Publication number
- JPH0331137A JPH0331137A JP16449489A JP16449489A JPH0331137A JP H0331137 A JPH0331137 A JP H0331137A JP 16449489 A JP16449489 A JP 16449489A JP 16449489 A JP16449489 A JP 16449489A JP H0331137 A JPH0331137 A JP H0331137A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- vibrating bodies
- feeding device
- sheet feeding
- vibrating body
- 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
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 230000000750 progressive effect Effects 0.000 claims description 11
- 230000001141 propulsive effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/008—Feeding 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)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
この発明は、紙片等の薄葉体を移動させるシート送り装
置に関し、特に、計算機、複写機、ファクシミリ、ワー
ドプロセッサー、タイプライタ−1等の機器に装備する
紙送り装置として好適なシート送り装置に関するもので
ある。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sheet feeding device for moving thin sheets such as pieces of paper, and is particularly applicable to devices such as computers, copying machines, facsimile machines, word processors, and typewriters. The present invention relates to a sheet feeding device suitable as a paper feeding device to be installed.
[従来の技術]
進行性振動を生じるように圧電素子等の振動子によフて
励振されている一対の弾性体間に紙等のシートを挟持さ
せつつ該シートを移動させるシート送り装置が本出願人
によって提案されており、たとえば特開昭59−177
243号公報には本出願人の提案になるシート送り装置
の発明が開示されている。[Prior Art] A sheet feeding device that moves a sheet of paper while sandwiching the sheet between a pair of elastic bodies that are excited by a vibrator such as a piezoelectric element to generate progressive vibrations is currently available. It has been proposed by the applicant, for example, in Japanese Patent Application Laid-Open No. 59-177.
No. 243 discloses an invention of a sheet feeding device proposed by the present applicant.
このシート送り装置は、適度な押圧力で接する1組の弾
性材製の振動体間にシートを挟持し、該各振動体に進行
性振動波を発生させることにより、挟持したシートを搬
送するようにしたものである。両振動体には、2群の圧
電素子等の電気−機械エネルギー変換素子が接着又は圧
接され、各群間にはλ/4の奇数倍のづれかあるように
圧電素子が設置され、また各群内ては圧電素子がλ/2
のピッチて且交互に逆の伸細極性となるように配列され
ている。そして、面振動体の各一方の圧電素子群に面振
動体の固有振動数近傍の周波数(実際には一方の振動体
の固有振動数)の交流電界を印加すると供に、面振動体
の各他方の圧電素子群にはπ/2移相器を通してπ/2
だけ位相のつれた交流電界を印加することにより、各振
動体にシートの搬送面に対して対称に進行性振動波を発
生させる。This sheet feeding device sandwiches a sheet between a pair of vibrating bodies made of an elastic material that are in contact with each other with an appropriate pressing force, and conveys the sandwiched sheet by generating progressive vibration waves in each of the vibrating bodies. This is what I did. Two groups of electro-mechanical energy converting elements such as piezoelectric elements are bonded or pressed to both vibrating bodies, and the piezoelectric elements are installed so that there is an odd multiple of λ/4 between each group, and each Within the group, the piezoelectric element is λ/2
They are arranged at pitches such that they alternately have opposite elongation and narrowing polarities. Then, an alternating current electric field with a frequency near the natural frequency of the planar vibrator (actually the natural frequency of one vibrator) is applied to each piezoelectric element group on one side of the planar vibrator, and each piezoelectric element group of the planar vibrator is The other piezoelectric element group is connected to a π/2 phase shifter through a π/2 phase shifter.
By applying alternating current electric fields that are out of phase with each other, progressive vibration waves are generated in each vibrating body symmetrically with respect to the conveying surface of the sheet.
そして、振動体に進行性振動波が発生すると、圧電素子
か設けられている面と反対側の面の各点が一種の楕円運
動を行ない、面振動体の対向する面の各点がシート搬送
面に対し対称に楕円運動する結果、シートが摩擦力にて
搬送されることになる。When a progressive vibration wave is generated in the vibrating body, each point on the surface opposite to the surface on which the piezoelectric element is provided performs a kind of elliptical movement, and each point on the opposite surface of the surface vibrating body moves toward the sheet conveyance. As a result of the elliptical movement symmetrical to the plane, the sheet is conveyed by frictional force.
第8図はこのような進行性振動波によるシート搬送力の
発生原理を説明する概略図で、振動体1及び2によりシ
ートSを適度な押圧力で挟持し、振動体1及び2には図
に示すように進行性振動が生じているものとする。この
とき、面振動体1及び2の表面のある質点に注目すると
、質点は一般には楕円軌道を描く運動をする。そして、
振動体1について言えは、進行性振動波が図中φで示す
右方向に進む場合、表面の質点は時計回りの楕円軌跡を
描くことになる。ここで、振動体1及び2に生じる進行
性振動波の位相差か空間的に 180゛ になるように
圧電素子に対する印加電圧の位相が制御されているので
、各振動体の進行性振動波はシートを対称面とする対称
波形となり、シート側に凸となる部分が常に対向するよ
うに進行する。また、前記白部分の質点の6動方向は振
動体1及び2において、それぞれの振動の進行方向とは
逆方向であるので、この場合は矢印←方向にシート搬送
力が発生する。一方、シートに対して凹となる部分にお
いては進行方向と同方向にシート搬送力が働くが凸部に
比較して圧力が小さいのでシートと振動体の摩擦力も小
さく、従ってシート搬送力も小さいため、シート搬送力
の総和としては、進行性振動波の進行方向とは逆方向に
働くことになる。FIG. 8 is a schematic diagram illustrating the principle of generation of sheet conveying force by such progressive vibration waves. Assume that progressive vibration is occurring as shown in . At this time, when paying attention to a certain mass point on the surface of the planar vibrating bodies 1 and 2, the mass point generally moves in an elliptical orbit. and,
Regarding the vibrating body 1, when the progressive vibration wave moves in the right direction as indicated by φ in the figure, the mass points on the surface draw a clockwise elliptical locus. Here, since the phase of the voltage applied to the piezoelectric element is controlled so that the phase difference between the progressive vibration waves generated in the vibrating bodies 1 and 2 becomes 180° spatially, the progressive vibration waves of each vibrating body are The waveform becomes symmetrical with the sheet as the plane of symmetry, and the waves progress so that the convex portions toward the sheet always face each other. Furthermore, since the six moving directions of the mass points in the white portion are opposite to the directions of vibration of the vibrators 1 and 2, in this case, a sheet conveying force is generated in the direction of the arrow ←. On the other hand, in the concave portions of the sheet, the sheet conveying force acts in the same direction as the traveling direction, but the pressure is smaller than in the convex portions, so the frictional force between the sheet and the vibrating body is also small, and therefore the sheet conveying force is also small. The total sheet conveying force acts in a direction opposite to the traveling direction of the progressive vibration waves.
第2図は前述のシート送り原理に基いて構成されたシー
ト送り装置の一例であり、本装置も本出願人によって提
案されているものである。FIG. 2 shows an example of a sheet feeding device constructed on the basis of the above-mentioned sheet feeding principle, and this device has also been proposed by the applicant.
このシート送り装置は、振動体として第2図に示すよう
なランニングトラック形の平面形状をもつ一対の環状振
動体3及び4を使用したものであり、各環状振動体の非
対向面には前述の圧電素子の如き電歪振動子5及び6が
固定されている。これらの電歪振動子5及び6はそれぞ
れ2群に分割され、その一方の群には他方の群に印加さ
れる電圧よりも90@だけ位相のずれた交流電圧が印加
されるようになっている。電歪振動子5及び6の2群に
互いに位相の異る2種の交流電圧が別々に印加されると
、前述の理論により各環状振動体3及び4には周方向に
沿って進行する進行波振動が生じ、シートSは進行波振
動の進む方向とは逆向きの力を各環状振動体から受けて
動かされる。ランニングトラック形の環状振動体を使用
するシート送り装置は該振動体の直線部分に生ずる進行
波振動をシート搬送力として利用するものであり、この
シート送り装置では該振動体の直線部分がシート送り方
向と平行になるように該振動体が配置される。このシー
ト送り装置は該振動体の配置位置によって2種類に分け
ることができ、第2図に示したシート送り装置は該振動
体3及び4がシートSの巾方向の中央に配置されている
。この型式のシート送り装置の場合、環状振動体3及び
4の二つの直線部分3a、3b (4a。This sheet feeding device uses a pair of annular vibrating bodies 3 and 4 having a running track-shaped planar shape as shown in FIG. 2 as vibrating bodies. Electrostrictive vibrators 5 and 6 such as piezoelectric elements are fixed. These electrostrictive vibrators 5 and 6 are each divided into two groups, and an alternating current voltage that is out of phase by 90 @ than the voltage applied to the other group is applied to one group. There is. When two types of alternating current voltages having different phases are applied separately to the two groups of electrostrictive vibrators 5 and 6, according to the above-mentioned theory, each annular vibrator 3 and 4 has a movement that progresses along the circumferential direction. Wave vibration occurs, and the sheet S is moved by receiving a force from each annular vibrating body in a direction opposite to the direction in which the traveling wave vibration advances. A sheet feeding device that uses a running track-shaped annular vibrating body utilizes traveling wave vibration generated in a straight section of the vibrating body as a sheet conveying force. The vibrating body is arranged parallel to the direction. This sheet feeding device can be divided into two types depending on the arrangement position of the vibrating body. In the sheet feeding device shown in FIG. 2, the vibrating bodies 3 and 4 are disposed at the center of the sheet S in the width direction. In the case of this type of sheet feeding device, two straight sections 3a, 3b (4a) of the annular vibrating bodies 3 and 4.
4b)が共にシートSに接しているとシートSは二つの
直線部分3a及び3bから互いに逆向きの力を受けて進
まなくなってしまうため、該振動体の一方の直線部分3
b及び4bの対向面の肉厚は第3図に示されるようにシ
ートSに接触しないように肉薄に設計されている。第2
図に示したシート送り装置では、環状振動体3及び4に
矢印f1方向の進行振動が生ずると、シートSはそれに
接触している一方の直線部分3a及び4aから推力を受
けて振動の進行方向とは逆向きに矢印f2の方向に動か
される。4b) are both in contact with the sheet S, the sheet S will receive forces from the two straight sections 3a and 3b in opposite directions and will not advance.
The opposing surfaces of b and 4b are designed to be thin so as not to come into contact with the sheet S, as shown in FIG. Second
In the sheet feeding device shown in the figure, when a traveling vibration occurs in the annular vibrating bodies 3 and 4 in the direction of the arrow f1, the sheet S receives a thrust from one of the straight portions 3a and 4a in contact with the annular vibrating bodies 3 and 4, and the sheet S receives a thrust in the traveling direction of the vibration. It is moved in the direction of arrow f2, which is the opposite direction.
ランニングトラック形の環状振動体を使用するシート送
り装置として該環状振動体をシートSの側縁に配置した
形式のものかある。第4図及び第5図はこの形式のシー
ト送り装置の側面図と分解斜視図とを示したものである
。この形式のシート送り装置では、ランニングトラック
形の環状振動体7及び8c半部のみがシートSに接触す
るようにシート走行路に面して配置され、該振動体の他
の半部はシート走行路の外側に配置されている。該振動
体7及び8のそれぞれの対向面には振動の進行方向(環
状振動体の周方向)に対して直角な溝8a(7a)と該
溝8a(7a)によって隔てられた歯形状の突部8b
(7b)とが交互に形成されている。このシート送り装
置におけるシート送り動作も第2図に示した装置とほぼ
同じであり、電歪振動子5及び6に励振されて該環状振
動体7及び8に第7図(a)の矢印f3の方向の進行振
動が生ずると、シー+−Sは該振動体の直線部分と平行
に且つ該振動の進行方向とは逆向きに矢印f4の方向へ
動かされてゆく。As a sheet feeding device using a running track-shaped annular vibrating body, there is a type in which the annular vibrating body is arranged at the side edge of the sheet S. 4 and 5 show a side view and an exploded perspective view of this type of sheet feeding device. In this type of sheet feeding device, only halves of the running track-shaped annular vibrating bodies 7 and 8c are disposed facing the sheet traveling path so as to contact the sheet S, and the other half of the vibrating bodies are disposed facing the sheet traveling path. located outside the road. The opposing surfaces of each of the vibrating bodies 7 and 8 are provided with a groove 8a (7a) perpendicular to the direction of vibration (circumferential direction of the annular vibrating body) and a tooth-shaped protrusion separated by the groove 8a (7a). Part 8b
(7b) are formed alternately. The sheet feeding operation in this sheet feeding device is also almost the same as the device shown in FIG. When a traveling vibration occurs in the direction of , the sea+-S is moved in the direction of arrow f4 parallel to the straight portion of the vibrating body and in the opposite direction to the direction of travel of the vibration.
[発明が解決しようとする課題]
第2図及び第4図に示した従来のシート送り装置ではシ
ートSの先端が該環状振動体の第2の円弧部に進入しよ
うとする時(第6図(a)及び第7図(a)に示す位置
にシートSが右向き方向に動いてきた時)に、第6図(
bl 及び第7図(b)に示すようにシートSの先端S
1が環状振動体3,4,7.8の第2の円弧部の3c4
c、7c、Beの内周縁の稜(角部)3d4d、7d、
8dにひっかかってシートsの進行が不可能になってし
まうことがあった。[Problems to be Solved by the Invention] In the conventional sheet feeding device shown in FIGS. 2 and 4, when the leading edge of the sheet S is about to enter the second arc portion of the annular vibrating body (see (a) and the position shown in FIG. 7(a) when the seat S moves in the rightward direction).
bl and the tip S of the sheet S as shown in FIG. 7(b).
1 is the second circular arc portion 3c4 of the annular vibrating body 3, 4, 7.8
c, 7c, inner periphery edge (corner) 3d4d, 7d,
There were cases where the sheet s got caught in the 8d and became unable to advance.
本発明の目的は、前記の如き従来装置の欠点を除き、改
良したシート送り装置を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide an improved sheet feeding device that eliminates the drawbacks of the prior art devices as described above.
[課題を解決するための手段コ
本発明では、該環状振動体3,4,7.8の内周縁の稜
3d、4d、7d、8dに面取り加工を施してテーパー
面3c、4c、7c、8cを形成させることによりシー
トSの先端が環状振動体間のシート送りギャップに容易
に進入できるようにしたことを特徴とする。[Means for Solving the Problems] In the present invention, the edges 3d, 4d, 7d, 8d of the inner peripheral edges of the annular vibrating bodies 3, 4, 7.8 are chamfered to form tapered surfaces 3c, 4c, 7c, 8c, the leading end of the sheet S can easily enter the sheet feeding gap between the annular vibrating bodies.
[実 施 例]
第1図に、本発明により改良されたシート送り装置の要
部示す。同図に示されるように、本発明のシート送り装
置では、環状振動体34.7.8の内周縁の稜にテーパ
ー面3e。[Example] Fig. 1 shows the main parts of a sheet feeding device improved according to the present invention. As shown in the figure, in the sheet feeding device of the present invention, the annular vibrating body 34.7.8 has a tapered surface 3e on the ridge of the inner peripheral edge.
4e、7e、8eを形成したので、図において左側から
右側へ向って動いてきたシートSの先端が環状振動体3
(7)及び4(8)の円弧部3c (7c)及び4c
(8c)のシート進入ギャップに容易に進入することが
でき、従って、本発明の装置ではシートが詰まってしま
うことがなく、常に円滑な装置動作が可能となる。4e, 7e, and 8e, the tip of the sheet S moving from the left side to the right side in the figure is the annular vibrating body 3.
(7) and 4 (8) arc portions 3c (7c) and 4c
The sheet can easily enter the sheet entrance gap (8c), and therefore, in the apparatus of the present invention, the sheet does not become jammed, and smooth operation of the apparatus is always possible.
[発明の効果コ
以上に説明したように、本発明では環状振動体の内周縁
の稜にテーパー面を形成したので、シート送りを常に円
滑に行うことができる。[Effects of the Invention] As explained above, in the present invention, since a tapered surface is formed on the ridge of the inner peripheral edge of the annular vibrating body, sheet feeding can always be performed smoothly.
第1図(a)は本発明による改良されたシート送り装置
の一部の平面図、第1図(b)は第1図(a)のb−b
矢視断面図、第2図は従来のシート送り装置の一例を示
す斜視図、第3図は第2図のIII −II+矢視断面
図、第4図は従来の別のシート送り装置の側面図、第5
図は第4図に示したシート送り装置の環状振動体の拡大
斜視図、第6図(a)は第2図に示したシート送り装置
においてシート送りに障害が発生する時のシートと環状
振動体との相対的位置関係を示した平面図、第6図(b
)は第6図(a)のb−b矢視断面図、第7図(a)は
第4図に示したシート送り装置においてシート送りに障
害が発生する時のシートと環状振動体との相対的位置関
係を示した平面図、第7図(b)は第7図(a)におけ
るb−b矢視断面図、第8図は本発明及び従来技術によ
るシート送り装置におけるシート送り原理を説明するた
めの図、である。
3.4,7.8・・・環状振動体
S・・・シート
3a、3b・・・直線部
3c・・・円弧部
3e、4e、7e
5.6・・・電歪振動子
8e・・・テーパー面FIG. 1(a) is a plan view of a portion of the improved sheet feeding device according to the present invention, and FIG. 1(b) is taken along line bb of FIG. 1(a).
2 is a perspective view showing an example of a conventional sheet feeding device, FIG. 3 is a sectional view taken along arrows III-II+ of FIG. 2, and FIG. 4 is a side view of another conventional sheet feeding device. Figure, 5th
The figure is an enlarged perspective view of the annular vibrating body of the sheet feeding device shown in Fig. 4, and Fig. 6 (a) shows the sheet and annular vibration when a failure occurs in sheet feeding in the sheet feeding device shown in Fig. 2. A plan view showing the relative positional relationship with the body, Fig. 6(b)
) is a sectional view taken along the line bb in FIG. 6(a), and FIG. 7(a) shows the relationship between the sheet and the annular vibrating body when a failure occurs in sheet feeding in the sheet feeding device shown in FIG. 4. FIG. 7(b) is a plan view showing the relative positional relationship, FIG. 7(b) is a sectional view taken along the line bb in FIG. 7(a), and FIG. This is a diagram for explaining. 3.4, 7.8...Annular vibrating body S...Sheets 3a, 3b...Straight portion 3c...Circular portions 3e, 4e, 7e 5.6...Electrostrictive vibrator 8e...・Tapered surface
Claims (1)
環状振動体に周方向に進行する進行性振動を生じさせる
ための振動子と、を有 し、移送すべきシートを該環状振動体間に挟みつけつつ
該環状振動体の振動により該シートに推進力を加えて移
動させるシート送り装置において、 該環状振動体の内周縁の稜部にテーパー面 を形成したことを特徴とするシート送り装 置。[Scope of Claims] 1. A device comprising a pair of annular vibrating bodies disposed opposite to each other and a vibrator for generating progressive vibrations that proceed in the circumferential direction in the annular vibrating bodies, and which is to be transported. In a sheet feeding device that moves a sheet by applying a propulsive force to the sheet by vibration of the annular vibrating body while sandwiching the sheet between the annular vibrating bodies, a tapered surface is formed on the ridge of the inner peripheral edge of the annular vibrating body. A sheet feeding device featuring:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16449489A JPH0331137A (en) | 1989-06-27 | 1989-06-27 | Sheet feeder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16449489A JPH0331137A (en) | 1989-06-27 | 1989-06-27 | Sheet feeder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0331137A true JPH0331137A (en) | 1991-02-08 |
Family
ID=15794229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16449489A Pending JPH0331137A (en) | 1989-06-27 | 1989-06-27 | Sheet feeder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0331137A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5484216A (en) * | 1992-12-03 | 1996-01-16 | Canon Kabushiki Kaisha | Supporting device for a vibration driven actuator |
US5945771A (en) * | 1993-01-22 | 1999-08-31 | Canon Kabushiki Kaisha | Vibration wave driven motor and a printing apparatus |
-
1989
- 1989-06-27 JP JP16449489A patent/JPH0331137A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5484216A (en) * | 1992-12-03 | 1996-01-16 | Canon Kabushiki Kaisha | Supporting device for a vibration driven actuator |
US5945771A (en) * | 1993-01-22 | 1999-08-31 | Canon Kabushiki Kaisha | Vibration wave driven motor and a printing apparatus |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5274294A (en) | Vibration wave driven motor | |
JPS59177243A (en) | Sheet feed device | |
JPH0331137A (en) | Sheet feeder | |
JP2687233B2 (en) | Sheet feeder | |
EP0404158B1 (en) | Sheet feeding apparatus | |
JP2705820B2 (en) | Vibration wave motor device | |
JPS61224880A (en) | Vibration wave motor | |
JPH03190578A (en) | Oscillation wave motor | |
JP2725873B2 (en) | Sheet feeder | |
JPH0336129A (en) | Sheet feeding device | |
JPH02193835A (en) | Sheet feed device | |
JPS6277071A (en) | Linear elastic wave motor | |
JPH0331138A (en) | Sheet feeder | |
JPH0342444A (en) | Sheet feeder | |
JPH0331139A (en) | Sheet feeder | |
JPH0331136A (en) | Sheet feeder | |
JPH03256947A (en) | Sheet feed device | |
JPH01110070A (en) | Driving method for supersonic motor | |
JPH0342443A (en) | Sheet feeder | |
JPH02209338A (en) | Sheet feeder | |
JPS63291250A (en) | Method and device for regulating tape | |
JPH02209334A (en) | Sheet feeder | |
JPH01117672A (en) | Driving method for ultrasonic motor | |
JPH0323131A (en) | Sheet feeder | |
JPH01110071A (en) | Driving method for supersonic motor |