JPS6249367A - Positioning method for transfer position of form in copying machine - Google Patents

Positioning method for transfer position of form in copying machine

Info

Publication number
JPS6249367A
JPS6249367A JP60188352A JP18835285A JPS6249367A JP S6249367 A JPS6249367 A JP S6249367A JP 60188352 A JP60188352 A JP 60188352A JP 18835285 A JP18835285 A JP 18835285A JP S6249367 A JPS6249367 A JP S6249367A
Authority
JP
Japan
Prior art keywords
paper
copying machine
transfer
roller
gate
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.)
Granted
Application number
JP60188352A
Other languages
Japanese (ja)
Other versions
JPH0517547B2 (en
Inventor
Yasuo Iwasaki
寧夫 岩崎
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP60188352A priority Critical patent/JPS6249367A/en
Publication of JPS6249367A publication Critical patent/JPS6249367A/en
Publication of JPH0517547B2 publication Critical patent/JPH0517547B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Paper Feeding For Electrophotography (AREA)
  • Registering Or Overturning Sheets (AREA)

Abstract

PURPOSE:To completely remove the distortion of form transfer and to prevent a device from an image lacking phenomenon by forming an auxiliary carrying means for applying added power to form on the form carrying-in side of a resist roller. CONSTITUTION:A pair of slip rollers 7 are arranged on the resist roller 4 side of a form carrying path 6 and a gate 8 for opening/closing at the timing of the rotation of a photosensitive drum 2 is arranged on the leading end side of the path 6. Since the slip rollers 7 are formed by polyurethane foam and pivoted so as to be always rotated in the arrow directions each other, the rollers 7 carry the form 1 carried by a transport roller 3 to the forward side with 80-100gf carrying force to apply ahead power to the form 1, and when the leading end of the form 1 is abutted upon said gate 8, slip to stop the carrying of the form 1.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は複写機における用紙の転写位置合せ方法に関す
るもので、特に用紙搬゛送部にて搬送される用紙に座屈
変形を与え、その座屈変形による弾発力により用紙を前
進せしめて、感光体の潜像位置に用紙を合致させるよう
にしたことを特徴とする複写機における用紙の転写位置
合せ方法の改良に係るものである。
Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for aligning the transfer position of paper in a copying machine, and in particular to a method for applying buckling deformation to the paper being conveyed in a paper conveyance section. This invention relates to an improvement in a method for aligning paper transfer in a copying machine, characterized in that the paper is moved forward by elastic force caused by buckling deformation to match the position of a latent image on a photoreceptor.

[従来の技術] 一般に、電子写真複写機では感光体の潜像位置と用紙と
を合致させる必要があり、その方法として第4図に示す
ようなゲート(a)を用いた転写位置合せ方法が採用さ
れている。
[Prior Art] Generally, in an electrophotographic copying machine, it is necessary to match the position of the latent image on the photoreceptor with the paper, and a transfer alignment method using a gate (a) as shown in FIG. 4 is a method for this purpose. It has been adopted.

すなわちこの種の方法では、給紙装置(図示せず)から
1枚となって送り出された用紙(b)が、用紙搬送部の
最終端のトランスポートローラ(C)にて送られて用紙
(b)の先端がゲート(a)に突当たり、かつ用紙(b
)の後端部が円弧状のループ(bl)を作って一定のm
に達すると、上記トランスポートローラ(C)が停止し
、次いで一定のタイミングでゲート(a)が開放される
と用紙(1))の先端は、後端部のループ(bl)すな
わち座屈変形による弾発力によってレジストローラ(d
)まで前進し、常時回転するこのレジストローラ(d)
により感光ドラム(e)のm像位置へ送られるようにな
っている。
In other words, in this type of method, a sheet of paper (b) is sent out as a single sheet from a paper feeder (not shown), and is transported by a transport roller (C) at the final end of the paper transport section to form a sheet of paper (b). The tip of the paper (b) hits the gate (a) and the paper (b)
The rear end of ) forms an arc-shaped loop (bl) with a constant m
When the transport roller (C) stops, and then the gate (a) is opened at a certain timing, the leading edge of the paper (1)) is deformed by the loop (bl) at the rear end, that is, buckling deformation. The registration roller (d
) and rotates constantly (d)
The image is sent to the m image position on the photosensitive drum (e).

[発明が解決しようとする問題点] しかしながら従来の方法では、搬送する用紙(b)の厚
薄により、用紙(b)先端の上記ゲート(a)が開放さ
れてからレジストローラ(d)の接触部までの到達する
時間にばらつきが生じるため、転写位置がずれるという
問題があった。
[Problems to be Solved by the Invention] However, in the conventional method, due to the thickness of the paper (b) to be conveyed, the contact portion of the registration roller (d) is closed after the gate (a) at the leading edge of the paper (b) is opened. There was a problem in that the transfer position was shifted due to variations in the time it took to reach the target.

すなわち厚紙と較べて薄紙の場合用紙の腰が弱いため、
薄い用紙(b)では第4図に示すように円弧状ループと
なる座屈変形による弾発力が弱く、そのttJ進力を強
くとることができないためにゲート(a)が開放されて
からレジストローラ(d)の接触部まで到達する時間が
、厚い用紙(d)と較べて若干遅くなるためであった。
In other words, thin paper is less stiff than thick paper,
In the case of thin paper (b), the elastic force due to the buckling deformation that forms an arcuate loop is weak as shown in Figure 4, and the ttJ propulsion force cannot be strong, so the resist is removed after the gate (a) is opened. This is because the time it takes for the paper to reach the contact portion of the roller (d) is slightly slower than for the thick paper (d).

このため従来においては第5図に示すように、用紙搬送
通路(f)の空間を若干狭くし、用紙(b)の後端部に
細かな多重の座屈変形を形成して用紙(b)の前進力を
増大させる方法が採られており、この方法によって用紙
の厚薄による上記レジストローラ(d)への到達時間の
差が小さくなるため、転写位置がずれるといった上記弊
害を防止できる長所を有していた。
For this reason, in the past, as shown in FIG. 5, the space of the paper conveyance path (f) is slightly narrowed, and fine multiple buckling deformations are formed at the trailing edge of the paper (b). This method reduces the difference in the time it takes for paper to reach the registration roller (d) depending on the thickness of the paper, so it has the advantage of preventing the above-mentioned disadvantages such as misalignment of the transfer position. Was.

しかしこの方法を採った場合、用紙の前進力の増大が図
れる反面、上記用紙(b)に形成されたループ状の小さ
な変形が感光ドラム(e)の転写域まで残り、この結果
感光ドラム(e)上の1−ナーの一部が用紙(b)へ転
写されなくなる“像抜け”現象が生ずる欠点があった。
However, when this method is adopted, although it is possible to increase the forward force of the paper, the small loop-shaped deformation formed on the paper (b) remains up to the transfer area of the photosensitive drum (e). ) has the disadvantage that a part of the 1-toner on the paper (b) is not transferred to the paper (b), resulting in an "image dropout" phenomenon.

[問題点を解決するための手段及び作用1本発明は以上
の問題点に着目して成されたもので、その課題とすると
ころは、細かな多重の座屈変形を形成することなく用紙
の前進力を増大させて、感光体の潜像位置との合致を確
実に行える複写機における用紙の転写位置合せ方法を提
供することにある。
[Means and effects for solving the problem 1 The present invention has been made by paying attention to the above problem, and its object is to solve the problem without forming multiple fine buckling deformations. It is an object of the present invention to provide a method for aligning paper transfer in a copying machine, which increases advancing force and ensures alignment with the position of a latent image on a photoreceptor.

すなわち本発明は、給紙部から送り出される用紙を、用
紙搬送部の終端部においてゲートにより一時待機させる
と同時にこの用紙に座屈変形を与え、適宜タイミングに
合せて上記ゲートを開放して用紙をレジストローラに突
入させ、この用紙を感光体の潜像位置に合致させて供給
するようにした複写機における用紙の転写位置合せ方法
において、上記レジストローラの用紙搬入側には用紙に
前進力を付与するための補助搬送手段を配設することに
より、用紙の前進力を増大させてその先端の上記レジス
トローラの接触部までの到達時間のばらつきを無くし、
もって感光体の潜像位置に合致すべく用紙を供給できる
ようにしたものである。
That is, in the present invention, the paper sent out from the paper feed section is temporarily held by a gate at the terminal end of the paper transport section, and at the same time the paper is subjected to buckling deformation, and the gate is opened at an appropriate timing to release the paper. In a method for aligning paper transfer in a copying machine, in which paper is fed into a registration roller so as to match the position of a latent image on a photoconductor, a forward force is applied to the paper on the paper input side of the registration roller. By arranging an auxiliary conveyance means for the purpose of increasing the forward force of the paper and eliminating variations in the time it takes for the leading edge of the paper to reach the contact portion of the registration roller,
This makes it possible to feed paper so as to match the position of the latent image on the photoreceptor.

[実施例] 以下本発明の実施例を添附図面を幸照にして詳細に説明
する。
[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

第1図は本発明の用紙の転写位置合せ方法の実施態様を
示す説明図で、給紙装置(図示せず)から送出された用
41t(1)を、感光ドラム(2)側へ搬送する搬送部
の終端部に位置するトランスポートローラ(3)と、感
光ドラム(2)へ用紙(1)を供給するレジストローラ
(4)との間に、複数のガイド板(5)をもって用紙搬
送通路(6)が形成されており、この用紙搬送通路(6
)のレジストローラ(4)側に一対のスリップローラ(
7)が配設されていると共に、用紙搬送通路(6)の先
端側には上記感光ドラム(2)の回転にタイミングを合
せて開閉動作するゲート(8)が配設されている。
FIG. 1 is an explanatory diagram showing an embodiment of the paper transfer alignment method of the present invention, in which a sheet of paper 41t (1) sent out from a paper feeder (not shown) is conveyed to the photosensitive drum (2) side. A paper transport path is provided with a plurality of guide plates (5) between the transport roller (3) located at the end of the transport section and the registration roller (4) that supplies the paper (1) to the photosensitive drum (2). (6) is formed, and this paper conveyance path (6) is formed.
) on the registration roller (4) side of the pair of slip rollers (
7), and a gate (8) that opens and closes in synchronization with the rotation of the photosensitive drum (2) is provided at the leading end of the paper conveyance path (6).

そして上記一対のスリップローラ(7)は、発泡ポリウ
レタンにて形成され、第2図に示すように互いに矢印方
向へ常時回eするように軸受されて配設されており、上
記トランスポートローラ(3)にて搬送される用紙(1
)を80〜100grの搬送力でもって前方側へ搬送し
て、用紙(1)に前進力を付与すると共に、用紙(1)
先端が上記ゲート(8)に突当たるとスリップして用紙
(1)の搬送を停止するように形成されている。
The pair of slip rollers (7) are made of foamed polyurethane, and are disposed on bearings so as to constantly rotate in the direction of the arrow as shown in FIG. ) conveyed by paper (1
) is conveyed to the front side with a conveyance force of 80 to 100gr to apply forward force to the paper (1), and at the same time
It is formed so that when the leading edge hits the gate (8), it slips and stops conveying the paper (1).

そしてこのように構成された転写位置合せ装置において
は、第1図に示すように給紙装置から送出された用紙(
1)がトランスボートローラ(3)並びに上記スリップ
ローラ(7)に搬送されてその先端が上記ゲート(8)
に突当たると、上記スリップローラ(7)は、その搬送
力が用紙(1)のもつ腰より弱いためにスリップして用
紙の搬送を停止すると共に、上記用紙(1)については
、トランスボートローラ(3)の作用により用紙搬送通
路(6)内のスリップローラ(7)とトランスボートロ
ーラ(3)間において一重の円弧状ループ、すなわち座
屈変形(1a)が形成される。
In the transfer alignment device configured in this way, as shown in FIG.
1) is conveyed to the transport roller (3) and the slip roller (7), and the tip thereof is connected to the gate (8).
When the slip roller (7) hits the transport roller (7), its transport force is weaker than the stiffness of the paper (1), so it slips and stops transporting the paper. Due to the action (3), a single arcuate loop, that is, a buckling deformation (1a), is formed between the slip roller (7) and the transport roller (3) in the paper conveyance path (6).

そして用紙(1)の一定員が用紙搬送通路(6)内に達
すると、トランスボートローラ(3)が停止し、次いで
一定のタイミングでゲート(8)が開放されると、用紙
(1)の先端はその後端部の座屈変形(1a)による弾
発力と、上記スリップローラ(7)の搬送力との合成力
によってレジストローラ(4)まで前進し、常時回転す
るレジストローラ(4)によって感光ドラム(2)の潜
像位置に合致すべく供給される。
When a certain number of sheets of paper (1) reaches the paper transport path (6), the transport roller (3) stops, and then, when the gate (8) is opened at a certain timing, the paper (1) The tip advances to the registration roller (4) by the combined force of the elastic force due to the buckling deformation (1a) of the rear end and the conveying force of the slip roller (7), and is moved by the constantly rotating registration roller (4). It is supplied to match the position of the latent image on the photosensitive drum (2).

このとき上記用紙(1)に作用する力(F)並びに上記
ゲート(8)が開放されて、用紙(1)先端が上記レジ
ストローラ(4)へ前進するときの加速度(α)は、以
下の関係式にて表すことができる。
At this time, the force (F) acting on the paper (1) and the acceleration (α) when the gate (8) is opened and the leading edge of the paper (1) advances toward the registration roller (4) are as follows. It can be expressed by a relational expression.

F−f、+f2−γ  ・・・■ F−mα       ・・・■ (但しflは座屈変形による用紙の弾発力、f2はスリ
ップローラによる用紙の 前進力、γはスリップローラの摩擦 力、mは用紙搬送通路内の用紙の重 量をそれぞれ示している。) また0式及び0式から α−(f、+f2−γ)/m  ・・・■そして用紙(
1)が厚い場合には、用紙の腰が強くかつ上記スリップ
ローラ(7)と強く圧接するため、用紙の弾発力(fl
)及び用紙の前進力(f2)は薄い用紙(1)より大き
くなるが、摩擦力(γ)及び用紙の重量(m)も薄い用
紙(1)より大きいため、上記0式から導かれる厚紙並
びに薄紙の加速度(α)は略同−となる。
F-f, +f2-γ ...■ F-mα ...■ (where fl is the elastic force of the paper due to buckling deformation, f2 is the forward force of the paper due to the slip roller, γ is the frictional force of the slip roller, m indicates the weight of the paper in the paper conveyance path.) Also, from the 0 formula and the 0 formula, α-(f, +f2-γ)/m ... ■ and the paper (
1) is thick, the paper is stiff and comes into strong pressure contact with the slip roller (7).
) and the advancing force (f2) of the paper are larger than the thin paper (1), but the frictional force (γ) and the paper weight (m) are also larger than the thin paper (1), so the thick paper and The acceleration (α) of the thin paper is approximately the same.

また用紙(1)が薄い場合には、用紙の腰が弱くて用紙
(1)の弾発力(fl)は小さいが、スリップローラ(
7)による前進力(f2)が加わるため、薄紙に作用す
る力(F)は充分となる。
In addition, if the paper (1) is thin, the elasticity (fl) of the paper (1) is small because the paper is weak, but the slip roller (
Since the forward force (f2) due to 7) is added, the force (F) acting on the thin paper becomes sufficient.

従って搬送する用紙(1)の厚薄に関係なく、上記ゲー
ト(8)が開放されてからレジストローラ(4)の接触
部まで到達する時間が略同−になるため、用紙(1)を
感光ドラム(2)の潜像位置に合致させることができる
Therefore, regardless of the thickness of the paper (1) to be conveyed, the time from the opening of the gate (8) to the contact point of the registration roller (4) is approximately the same. It is possible to match the position of the latent image in (2).

尚この実施例においては、用紙(1)に前進力を付与す
るための補助搬送手段として一対のスリップローラ(ア
)が使用されているが、本発明はこの構成に限定される
ものではなく、例えば第3図に示すように上記スリップ
ローラ(7)に替えて、適宜ゴム材にて形成され、≠の
表面に微小な小孔が穿設されて常時矢印方向へ回動する
ローラ(9)と、この内側に設けられ、上面側が開放さ
れた断面略C形状のバキュームボックス(10)とから
構成されるバキューム型のスリップローラ(11)を使
用しても同様の効果を得ることができる。
In this embodiment, a pair of slip rollers (A) are used as auxiliary conveyance means for applying forward force to the paper (1), but the present invention is not limited to this configuration. For example, as shown in FIG. 3, instead of the slip roller (7), there is a roller (9) made of an appropriate rubber material, with minute holes bored in its surface and constantly rotating in the direction of the arrow. A similar effect can be obtained by using a vacuum-type slip roller (11) comprising a vacuum box (10) provided inside the vacuum box (10) and having an approximately C-shaped cross section with an open upper surface.

[発明の効果] 本発明は以上のように、レジストローラの用紙搬入側に
用紙に前進力を付与するための補助搬送手段を設けてい
るため、細かな多重の座屈変形を形成することなく用紙
の前進力を増大させることができる。
[Effects of the Invention] As described above, the present invention is provided with the auxiliary conveying means for applying forward force to the paper on the paper inlet side of the registration roller, so that the paper can be transported without forming multiple fine buckling deformations. The forward force of the paper can be increased.

従って用紙を、その厚薄に関係なく略同−タイミングで
上記レジストローラの接触部まで到達させることかでき
るため、感光体の潜像位置に用紙を合致させることがで
き、用紙への転写のばらつきを皆無にすることができる
と共に、像抜は現象を防止できる効果を有している。
Therefore, regardless of the thickness of the paper, it is possible to reach the contact portion of the registration roller at approximately the same timing, so the paper can be aligned with the latent image position on the photoreceptor, and variations in transfer to the paper can be reduced. Image removal has the effect of preventing the phenomenon.

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

第1図は本発明の転写位置合せ方法の実IM態様を示す
説明図、第2図はその一部拡大図、第3図は本発明にお
ける補助搬送手段であるバキューム型のスリットローラ
の断面図を示し、また第4図及び第5図は従来の転写位
置合せ方法を示す説明図である。 [符号説明] (1)・・・用紙  (1a)・・・座屈変形(2)・
・・感光ドラム (3)・・・トランスポートローラ (4)・・・レジストローラ  (5)・・・ガイド板
(6)・・・用紙搬送通路 (7)・・・スリップロー
ラ(8)・・・ゲート  (9)・・・ローラ(10)
・・・バキュームボックス (11)・・・バキューム型のスリップローラ特 許 
出 願 人 富士ゼロックス株式会社代  理  人 
 弁理士  中  村  智  廣 (外2名)第4図 第5図 第1図 第2図 1:用紙 9:ローラ 11:バキュ1ど、!2、リスリ・ンフ0o−ラ第3@
FIG. 1 is an explanatory diagram showing an actual IM mode of the transfer positioning method of the present invention, FIG. 2 is a partially enlarged view thereof, and FIG. 3 is a sectional view of a vacuum type slit roller which is the auxiliary conveyance means in the present invention. 4 and 5 are explanatory diagrams showing a conventional transfer positioning method. [Explanation of symbols] (1)...Paper (1a)...Buckling deformation (2)
... Photosensitive drum (3) ... Transport roller (4) ... Registration roller (5) ... Guide plate (6) ... Paper conveyance path (7) ... Slip roller (8) ... ...Gate (9) ...Roller (10)
...Vacuum box (11) ...Vacuum type slip roller patent
Applicant: Fuji Xerox Co., Ltd. Agent
Patent Attorney Tomohiro Nakamura (2 others) Figure 4 Figure 5 Figure 1 Figure 2 Figure 1: Paper 9: Roller 11: Vacuum 1! 2. Lisri Nfu 0o-ra No. 3 @

Claims (3)

【特許請求の範囲】[Claims] (1)給紙部から送り出される用紙を、用紙搬送部の終
端部においてゲートにより一時待機させると同時にこの
用紙に座屈変形を与え、適宜タイミングに合せて上記ゲ
ートを開放して用紙をレジストローラに突入させ、この
用紙を感光体の潜像位置に合致させて供給するようにし
た複写機における用紙の転写位置合せ方法において、上
記レジストローラの用紙搬入側には用紙に前進力を付与
するための補助搬送手段を配設し、この手段による用紙
の前進力と上記座屈変形による用紙の弾発力との合成力
により、上記用紙をレジストローラに突入させて感光体
の潜像位置に合致すべく用紙を供給することを特徴とす
る複写機における用紙の転写位置合せ方法。
(1) The paper sent out from the paper feed section is temporarily held by a gate at the end of the paper transport section, and at the same time the paper is subjected to buckling deformation, and the gate is opened at an appropriate timing to transfer the paper to the registration rollers. In a paper transfer positioning method in a copying machine in which the paper is fed by aligning it with the latent image position on the photoreceptor, the paper feed side of the registration roller is used to apply a forward force to the paper. An auxiliary conveying means is provided, and the combined force of the advancing force of the paper by this means and the elastic force of the paper due to the buckling deformation causes the paper to rush into the registration rollers and match the position of the latent image on the photoreceptor. 1. A method for aligning paper transfer in a copying machine, characterized in that paper is fed so as to be aligned in a copying machine.
(2)上記補助搬送手段が一対のスリップローラにより
構成されていることを特徴とする特許請求の範囲第1項
記載の複写機における用紙の転写位置合せ方法。
(2) A method for positioning paper transfer in a copying machine according to claim 1, wherein the auxiliary conveyance means is constituted by a pair of slip rollers.
(3)上記補助搬送手段がバキューム型のスリップロー
ラにより構成されていることを特徴とする特許請求の範
囲第1項記載の複写機における用紙の転写位置合せ方法
(3) A method for positioning paper transfer in a copying machine according to claim 1, wherein the auxiliary conveying means comprises a vacuum type slip roller.
JP60188352A 1985-08-29 1985-08-29 Positioning method for transfer position of form in copying machine Granted JPS6249367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60188352A JPS6249367A (en) 1985-08-29 1985-08-29 Positioning method for transfer position of form in copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60188352A JPS6249367A (en) 1985-08-29 1985-08-29 Positioning method for transfer position of form in copying machine

Publications (2)

Publication Number Publication Date
JPS6249367A true JPS6249367A (en) 1987-03-04
JPH0517547B2 JPH0517547B2 (en) 1993-03-09

Family

ID=16222121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60188352A Granted JPS6249367A (en) 1985-08-29 1985-08-29 Positioning method for transfer position of form in copying machine

Country Status (1)

Country Link
JP (1) JPS6249367A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7858182B2 (en) 2004-08-31 2010-12-28 Teijin Techno Products Limited Wholly aromatic polyamide fibers excellent in processability and adhesiveness

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099550A (en) * 1973-12-29 1975-08-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099550A (en) * 1973-12-29 1975-08-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7858182B2 (en) 2004-08-31 2010-12-28 Teijin Techno Products Limited Wholly aromatic polyamide fibers excellent in processability and adhesiveness

Also Published As

Publication number Publication date
JPH0517547B2 (en) 1993-03-09

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