JPH0629119B2 - Paper transport device - Google Patents
Paper transport deviceInfo
- Publication number
- JPH0629119B2 JPH0629119B2 JP59171844A JP17184484A JPH0629119B2 JP H0629119 B2 JPH0629119 B2 JP H0629119B2 JP 59171844 A JP59171844 A JP 59171844A JP 17184484 A JP17184484 A JP 17184484A JP H0629119 B2 JPH0629119 B2 JP H0629119B2
- Authority
- JP
- Japan
- Prior art keywords
- conveyor belt
- peripheral surface
- sheet
- paper
- inner peripheral
- 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.)
- Expired - Lifetime
Links
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
- B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
- B65H43/02—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable detecting, or responding to, absence of articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/16—Delivering or advancing articles from machines; Advancing articles to or into piles by contact of one face only with moving tapes, bands, or chains
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は複写機等に用いることができる用紙搬送装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device that can be used in a copying machine or the like.
従来例の構成とその問題点 従来、複写機等において、種々の用紙に複写機すことが
可能なものが提供されている。その用紙の一つとして官
製はがき（以下はがきと称す）があり、これに複写でき
ることは大きな利点である。しかし、はがきは他の用紙
に比べて大きさが小さく、しかも厚みが大きい為、装置
の中を搬送することは困難であり、トラブルも起こし易
かった。Configuration of Conventional Example and Problems Thereof Conventionally, a copying machine or the like that can be used for copying various types of paper has been provided. One of the paper sheets is a postcard manufactured by the government (hereinafter referred to as a postcard), and being able to copy on it is a great advantage. However, since postcards are smaller in size and thicker than other papers, it is difficult to convey them through the apparatus, and troubles are likely to occur.
以下、図面を参照しながら従来の用紙搬送装置について
説明する。第１図は従来の用紙搬送装置の概略構成図で
あり、１は感光体、２は用紙であり、周知の手段によっ
て感光体１上のトナー像が転写された後に剥離され、ベ
ルト３上に乗せられて定着器４まで搬送され、定着器４
でトナー像を定着された後に排紙トレイ５上に積載され
る。ベルト３は表面に細かい突起３ａを有している。そ
の突起３ａは用紙との接触面積を減らして搬送力を高め
たり、ベルト上の汚れを用紙に付着させないためにあ
る。定着器４は熱ローラ６、加圧ローラ７、案内板８よ
り構成されており、周知の如く用紙が定着器を通過する
時にシワが発生するのを防ぐ為、案内板８は中央部が熱
ローラ６、加圧ローラ７の接線よりやや高くなってい
る。ところが、はがみは通常の用紙より厚いのでベルト
３に密着しにくく搬送力も弱い為、第１図に点線９で示
すようにその先端が熱ローラ６に当接したままで加圧ロ
ーラ７との間にかみ込ます、下面はベルト３上に乗った
ままですべり（厳密にいえば突器３ａ上をすべり）前に
進まないという状態になり、紙づまりを起こすという問
題点を有していた。Hereinafter, a conventional sheet conveying device will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a conventional sheet conveying apparatus. Reference numeral 1 is a photoconductor, 2 is a sheet, and the toner image on the photoconductor 1 is transferred by a well-known means and then peeled off. The fixing device 4 is loaded and conveyed to the fixing device 4.
After the toner image is fixed by (1), the toner image is stacked on the discharge tray 5. The belt 3 has fine protrusions 3a on its surface. The protrusions 3a are provided to reduce the contact area with the paper to enhance the carrying force and prevent dirt on the belt from adhering to the paper. The fixing device 4 is composed of a heat roller 6, a pressure roller 7 and a guide plate 8. As is well known, in order to prevent wrinkles from being generated when a sheet passes through the fixing device, the guide plate 8 is heated at the center. It is slightly higher than the tangent line of the roller 6 and the pressure roller 7. However, since the edge is thicker than ordinary paper, it is difficult for the edge to come into close contact with the belt 3 and the conveyance force is weak, and therefore, as shown by the dotted line 9 in FIG. There is a problem that the lower surface of the belt 3 remains on the belt 3 (strictly speaking, it slips on the protrusion 3a) and does not advance to the front, which causes a paper jam.
発明の目的 本発明の目的は、はがきも確実に搬送することのできる
用紙搬送装置を提供することにある。OBJECT OF THE INVENTION It is an object of the present invention to provide a paper transporting device that can reliably transport postcards.
発明の構成 本発明の用紙搬送装置は、上記目的を達成するため、通
常は内周側へ突出部を有する搬送ベルトとこの突出部を
搬送ベルトの外周側へ突出可能な突出作動手段と、用紙
通過検出センサとを設け、用紙通過検出センサがはがみ
の通過を検出した時、突出作動手段が動作して搬送ベル
トの突出部を搬送ベルトの外周側へ突出させ、突出部が
はききの後端を押して確実に搬送することができるよう
に構成したものである。In order to achieve the above-mentioned object, the sheet conveying apparatus of the present invention has a conveying belt which normally has a protruding portion on the inner peripheral side, a protrusion actuating means capable of protruding this protruding portion to the outer peripheral side of the conveying belt, and A passage detection sensor is provided, and when the paper passage detection sensor detects the passage of the paper, the projecting actuating means operates to project the projecting portion of the transport belt to the outer peripheral side of the transport belt, and the projecting portion removes the postcard. The rear end is pushed so that the rear end can be reliably conveyed.
実施例の説明 以下、本発明の実施例について図面を参照しながら説明
する。第２図は本発明の一実施例による用紙搬送装置の
概略構成図を示すものである。ここでは第１図による従
来例とは一部のみ異なるので共通部分には同一符号を付
し、説明は省略する。２０は搬送ベルトであり、２カ所
に内周側へ突出した突出部２０ａを有している。２ヶ所
の突出部２０ａはベルト２０の周長を２等分するような
位置に配設してある。いいかえれば、ベルト２０の半周
ごとに突出部２０ａが配設されている。この突出部20a
はその周辺に第５図および第６図に示すように切抜部を
設けることにより構成されており、後述する手段により
内周側から突出部２０ａを押した時、外周側へ突出し易
いようになっている。２１は用紙通過検出センサであ
り、本実施例では光反射型のセンサを用いており、用紙
がこの上を通過している時間を検出をするようになって
いる。２２はカム部２２ａを有する突出作動レバーであ
り、支軸２３を中心に回動可能に搬送ベルト２０の内周
側に設けられており、端部に掛けられたバネ２４によっ
て通常はカム部２２ａが搬送ベルト２０の内周面より離
れた位置にあるようになっている。２５はソレノイドで
あり、そのプランジャ２５ａは突出作動レバー２２の一
端に係合しており、動作時にはバネ２４の力に抗して突
出作動レバー２２を通常位置とは逆の方向に回動させ、
第３図に示すようにカム部２２ａが搬送ベルト２０の内
周面に接する位置まで作動させるようになっている。な
お、ソレノイド２５は用紙通過検出センサ２１がはがき
の通過を検出した時のみ、一定時間だけ動作するように
なっている。ここで、一定時間とは、本実施例のよう
に、ベルト２０の半期ごとに突出部２０ａが設けられて
いる場合は、ベルト２０が半周回転する時間である。Description of Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a schematic block diagram of a sheet conveying device according to an embodiment of the present invention. Here, since only a part is different from the conventional example shown in FIG. 1, common parts are given the same reference numerals and description thereof is omitted. Reference numeral 20 denotes a conveyor belt, which has two protruding portions 20a protruding toward the inner peripheral side. The two protruding portions 20a are arranged at positions that divide the circumference of the belt 20 into two equal parts. In other words, the protruding portion 20a is provided for each half circumference of the belt 20. This protrusion 20a
Is formed by providing a cutout portion in the periphery thereof as shown in FIGS. 5 and 6, and when the protrusion 20a is pushed from the inner peripheral side by means described later, it is easy to protrude to the outer peripheral side. ing. Reference numeral 21 denotes a paper passage detection sensor, which uses a light reflection type sensor in the present embodiment, and detects the time when the paper is passing over this. Reference numeral 22 denotes a projecting actuating lever having a cam portion 22a, which is provided on the inner peripheral side of the conveyor belt 20 so as to be rotatable about a support shaft 23. Normally, the cam portion 22a is provided by a spring 24 hung on the end portion. Is located apart from the inner peripheral surface of the conveyor belt 20. Reference numeral 25 is a solenoid, and its plunger 25a is engaged with one end of the protrusion actuating lever 22, and during operation, the protrusion actuating lever 22 is rotated in the direction opposite to the normal position against the force of the spring 24.
As shown in FIG. 3, the cam portion 22a is operated to a position where it comes into contact with the inner peripheral surface of the conveyor belt 20. The solenoid 25 operates for a fixed time only when the paper passage detection sensor 21 detects the passage of a postcard. Here, the fixed time is the time during which the belt 20 rotates half a turn when the protrusion 20a is provided every half year as in the present embodiment.
以上のように構成された用紙搬送装置の動作をはがきを
搬送する場合で説明する。従来例でも説明したように感
光体１上のトナー像を転写された後にはく離されたはが
き９は搬送ベルト２０上に乗って定着器４に向って搬送
される。この時、用紙通過検出センサ２１がはがきの通
過を検出すると、ソレノイド２５が動作し、突出作動レ
バー２２を回動させ、第３図に示すようにカム部２２ａ
が搬送ベルト２０の内周面に接する。一方、はがき９は
進行して先端が熱ローラ６に当接して一時止まる。搬送
ベルト２０は回転しているので、やがて第４図に示すよ
うに突出部２０ａが突出作動レバー２２のカム部２２ａ
上を通過すると、突出部２０ａはカム部２２ａによって
搬送ベルト２０の外周側へ突出され、その端面がはがき
９の後端を押してさらに前進させるので、はがき９は熱
ローラ６と加圧ローラ７の間にかみ込まれて定着器４を
通過し、排紙トレイ５上に積載される。ソレノイド２５
は一定時間だけ動作を続けた後に停止するので、突出作
動レバー２２は再び元の位置に戻る。以後も用紙通過検
出センサ２１がはがきの通過を検出した時だけソレノイ
ド２５が動作し、前述した一連の動作がくり返される。The operation of the sheet transporting device configured as described above will be described in the case of transporting a postcard. As described in the conventional example, the postcard 9 that has been peeled off after the toner image on the photoconductor 1 is transferred is carried on the carrying belt 20 toward the fixing device 4. At this time, when the paper passage detection sensor 21 detects the passage of the postcard, the solenoid 25 operates to rotate the protrusion actuating lever 22 to move the cam portion 22a as shown in FIG.
Contacts the inner peripheral surface of the conveyor belt 20. On the other hand, the postcard 9 advances and its tip comes into contact with the heat roller 6 and temporarily stops. Since the conveyor belt 20 is rotating, the projecting portion 20a eventually becomes the cam portion 22a of the projecting operating lever 22 as shown in FIG.
When passing over, the projecting portion 20a is projected to the outer peripheral side of the conveyor belt 20 by the cam portion 22a, and its end face pushes the rear end of the postcard 9 to further advance the postcard 9, so that the postcard 9 includes the heat roller 6 and the pressure roller 7. It is sandwiched between them, passes through the fixing device 4, and is stacked on the paper discharge tray 5. Solenoid 25
Continues to operate for a certain period of time and then stops, so that the protrusion actuating lever 22 returns to the original position again. Thereafter, the solenoid 25 operates only when the paper passage detection sensor 21 detects the passage of the postcard, and the series of operations described above is repeated.
なお、はがき以外の用紙が通過するときは、ソレノイド
２５は動作しないので、搬送ベルト２０の突出部２０ａ
も外周側へは突出せず、用紙を平坦に搬送する。また、
本実施例ではベルト２０の突出部２０ａが２ヶ所のみの
場合で説明したが、突出部２０ａは複数ヶ所設けてもよ
く、ソレノイドの動作時間は突出部２０ａの数に応じて
適宜設定すればよいことはいうまでもない。When a sheet other than a postcard passes, the solenoid 25 does not operate, so that the protruding portion 20a of the conveyor belt 20 is not operated.
Does not project to the outer peripheral side, and the paper is conveyed flat. Also,
In this embodiment, the case where the belt 20 has only two protruding portions 20a has been described, but a plurality of protruding portions 20a may be provided, and the operating time of the solenoid may be appropriately set according to the number of the protruding portions 20a. Needless to say.
発明の効果 以上の説明から明らかなように本発明は、内周側へ突出
部を有する搬送ベルトと、前記突出部を搬送ベルトの外
周側へ突出させる突出作動手段と、用紙通過検出センサ
とを設け、用紙通過検出センサによってはがきの通過を
検出した時、突出作動手段が動作するようにしたので、
前記突出部を搬送ベルトの外周側へ突出させ、突出部が
はがきの後端を押して確実な搬送をすることができる用
紙搬送装置を実現することができるものである。EFFECTS OF THE INVENTION As is apparent from the above description, the present invention includes a conveyor belt having a protrusion on the inner peripheral side, a protrusion actuating means for protruding the protrusion to the outer peripheral side of the conveyor belt, and a sheet passage detection sensor. When the passage of the postcard is detected by the paper passage detection sensor, the protrusion actuating means operates.
It is possible to realize a sheet conveying device in which the projecting portion is projected to the outer peripheral side of the transport belt, and the projecting portion pushes the rear end of the postcard for reliable transport.
【図面の簡単な説明】 第１図は従来の用紙搬送装置の概略構成図、第２図は本
発明の一実施例による用紙搬送装置の概略構成図、第３
図および第４図は同実施例の動作態様図、第５図は同実
施例の要部の拡大斜視図、第６図は第５図の一部拡大図
である。 ２０……搬送ベルト、２０ａ……突出部、２１……用紙
通過検出センサ、２２……突出作動レバー、２５……ソ
レノイド。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a conventional sheet transport device, FIG. 2 is a schematic configuration diagram of a sheet transport device according to an embodiment of the present invention, and FIG.
FIG. 4 and FIG. 4 are operation mode diagrams of the same embodiment, FIG. 5 is an enlarged perspective view of a main part of the same embodiment, and FIG. 6 is a partially enlarged view of FIG. 20 ... Conveyor belt, 20a ... Projection part, 21 ... Paper passage detection sensor, 22 ... Projection actuating lever, 25 ... Solenoid.
Claims (1)
面と同一高さであり、内周面へは所定の高さだけ突出し
ている突出部を有する搬送ベルトと、この搬送ベルトの
内周面に設けられ、前記搬送ベルトの内周面から離れた
第１の位置と前記搬送ベルトの内周面に接する第２の位
置の間を移動可能で、前記第２の位置にあるときは前記
搬送ベルトの突出部を搬送ベルトの外周面側へ突出させ
る突出作動手段と、用紙が通過したことを検出する用紙
通過検出手段と、前記搬送ベルト上を通過した用紙を受
けるローラ手段と、前記搬送ベルトとローラ手段間に設
けられ、中央部がローラ対の接線より高くなった案内板
とを具備し、前記用紙通過検出手段がはがきまたはその
長さに相当する用紙の通過を検出した場合のみ、前記突
出作動手段が所定時間だけ第２の位置に動作して前記搬
送ベルトの突出部を外周面側へ突出させ、前記用紙の後
端に前記突出部を係合させるように構成したことを特徴
とする用紙搬送装置。1. A conveyor belt having a protrusion which is normally at the same height as the outer peripheral surface at least at one position in the traveling direction and protrudes toward the inner peripheral surface by a predetermined height, and the conveyor belt. When it is in the second position, it is movable between a first position provided on the inner peripheral surface and separated from the inner peripheral surface of the conveyor belt and a second position in contact with the inner peripheral surface of the conveyor belt. A projecting actuating means for projecting the projecting portion of the conveyor belt to the outer peripheral surface side of the conveyor belt; a sheet passage detecting means for detecting passage of a sheet; and roller means for receiving the sheet having passed on the conveyor belt. In the case where the paper passage detection means is provided between the conveyor belt and the roller means and has a guide plate whose central portion is higher than the tangent line of the roller pair, and the paper passage detection means detects the passage of a postcard or a paper corresponding to the length thereof. Only, the protrusion actuating means is predetermined Operate only in the second position between is protruded to the outer peripheral surface of the projecting portion of the conveyor belt, a sheet conveying apparatus characterized by being configured to engage the protruding portion to the rear end of the sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59171844A JPH0629119B2 (en) | 1984-08-17 | 1984-08-17 | Paper transport device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59171844A JPH0629119B2 (en) | 1984-08-17 | 1984-08-17 | Paper transport device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6151454A JPS6151454A (en) | 1986-03-13 |
| JPH0629119B2 true JPH0629119B2 (en) | 1994-04-20 |
Family
ID=15930813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59171844A Expired - Lifetime JPH0629119B2 (en) | 1984-08-17 | 1984-08-17 | Paper transport device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0629119B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688715B2 (en) * | 1986-06-23 | 1994-11-09 | キヤノン株式会社 | Image forming device |
| JPH03180864A (en) * | 1989-12-11 | 1991-08-06 | Canon Inc | Image forming device |
| JPH03283893A (en) * | 1990-03-30 | 1991-12-13 | Nec Corp | Call signal detection circuit |
| JP4906619B2 (en) * | 2007-07-19 | 2012-03-28 | Ｔｐｒ株式会社 | Combination of piston and piston ring |
-
1984
- 1984-08-17 JP JP59171844A patent/JPH0629119B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6151454A (en) | 1986-03-13 |
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