JP2750543B2 - Recording paper transport mechanism of recording device - Google Patents
Recording paper transport mechanism of recording deviceInfo
- Publication number
- JP2750543B2 JP2750543B2 JP1277710A JP27771089A JP2750543B2 JP 2750543 B2 JP2750543 B2 JP 2750543B2 JP 1277710 A JP1277710 A JP 1277710A JP 27771089 A JP27771089 A JP 27771089A JP 2750543 B2 JP2750543 B2 JP 2750543B2
- Authority
- JP
- Japan
- Prior art keywords
- recording paper
- gripper
- paper transport
- recording
- transport belts
- 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 - Fee Related
Links
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Color Electrophotography (AREA)
- Discharge By Other Means (AREA)
Description
【発明の詳細な説明】 〔概要〕 この発明は、たとえば、マルチドラム型カラー画像記
録装置などの記録装置の記録紙搬送機構に関するもので
あり、 記録紙搬送ベルトの周長を従来より短くすることがで
き、記録紙搬送機構の高さを低くし、それによって記録
装置の小型化およびコストの低下を図ることを目的と
し、 記録紙の先端部を掴んで搬送するグリッパの両端に取
り付けた一対の無端状のグリッパ搬送ベルトと、この無
端状のグリッパ搬送ベルトと感光ドラムとの間にそれぞ
れ配設した複数の無端状の記録紙搬送ベルトとよりな
り、この記録紙搬送ベルトの表面の高さを前記グリッパ
の上面の高さにほぼ一致させ、かつ、グリッパが記録紙
搬送ベルトに干渉しないようにこのグリッパが嵌合する
凹部を、この記録紙搬送ベルト上に形成するとともに、
この凹部とグリッパの位置を同期させて回動させるよう
にした記録装置の記録紙搬送機構において、前記記録紙
搬送ベルトの周長を、グリッパの取り付け間隔のn/mと
し（n,mは整数）、前記凹部を記録紙搬送ベルト上のｎ
箇所に形成したことを特徴とするものである。DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a recording paper transport mechanism of a recording apparatus such as a multi-drum type color image recording apparatus, for example, in which the circumference of a recording paper transport belt is made shorter than before. For the purpose of reducing the height of the recording paper transport mechanism, thereby reducing the size and cost of the recording apparatus, a pair of grippers attached to both ends of a gripper that grips and transports the leading end of the recording paper An endless gripper transport belt, and a plurality of endless recording paper transport belts respectively disposed between the endless gripper transport belt and the photosensitive drum, and the height of the surface of the recording paper transport belt is reduced. A concave portion is formed on the recording paper transport belt so as to substantially match the height of the upper surface of the gripper and to fit the gripper so that the gripper does not interfere with the recording paper transport belt. Along with
In the recording paper transport mechanism of the recording apparatus in which the positions of the concave portion and the gripper are rotated in synchronization with each other, the circumferential length of the recording paper transport belt is set to n / m of a mounting interval of the gripper (where n and m are integers). ), The concave portion is formed on the recording paper conveying belt by n
It is characterized in that it is formed at a location.
この発明は、たとえばマルチドラム型カラー画像記録
装置などの記録装置の記録紙搬送機構の改良に関するも
のである。The present invention relates to an improvement in a recording paper transport mechanism of a recording device such as a multi-drum type color image recording device.
近年、カラー画像記録装置の高速化が進むとともに、
そのニーズが増大している。In recent years, with the speeding up of color image recording devices,
Its needs are increasing.
第２図は従来のマルチドラム型カラー画像記録装置の
概略を示すものである。このマルチドラム型カラー画像
記録装置は、４個の感光ドラム1a,1b,1c,1dをそれぞれ
中心とするイエロー、マゼンタ、シアン、ブラックの４
色のカラー画像記録ユニットU1,U2,U3,U4と、記録紙搬
送機構７と、用紙カセット８と、ピックアップローラ９
と、定着ユニット13と、用紙トレイ12とを備えている。
前記カラー画像記録ユニットU1は、感光ドラム1aの周囲
に帯電器2aと、露光光学系3aと、現像器4aと、転写器5a
と、クリーナ6aとをそれぞれ備えて構成されている。他
のカラー画像記録ユニットも同様な構成であり、1b,1c,
1dは感光ドラム、2b,2c,2dは帯電器、3b,3c,3dは露光光
学系、4b,4c,4dは現像器、5b,5c,5dは転写器、6b,6c,6d
はクリーナである。FIG. 2 schematically shows a conventional multi-drum type color image recording apparatus. This multi-drum type color image recording apparatus has four photosensitive drums 1a, 1b, 1c, and 1d, each having a center of yellow, magenta, cyan, and black.
Color image recording units U 1 , U 2 , U 3 , U 4 , recording paper transport mechanism 7, paper cassette 8, pickup roller 9
And a fixing unit 13 and a paper tray 12.
The color image recording unit U 1 includes a charger 2a around the photosensitive drum 1a, a exposure optical system 3a, a developing device 4a, the transfer device 5a
And a cleaner 6a. Other color image recording units have the same configuration, and 1b, 1c,
1d is a photosensitive drum, 2b, 2c, 2d is a charger, 3b, 3c, 3d is an exposure optical system, 4b, 4c, 4d is a developing device, 5b, 5c, 5d is a transfer device, 6b, 6c, 6d
Is a cleaner.
各カラー画像記録ユニットU1〜U4の現像器4a〜4dには
それぞれ異なった色の現像剤が入っている。現像器4a,4
b,4cにはカラー記録に必要な３原色のイエロー、マゼン
タ、シアンの現像剤がそれぞれ用いられ、現像器4dには
黒補正のためにブラックの現像剤が用いられている。Containing the respective different color developer to the developing device 4a~4d of the color image recording unit U 1 ~U 4. Developing units 4a, 4
The three primary colors yellow, magenta and cyan required for color recording are used for b and 4c, respectively, and the black developer is used for black correction for the developing unit 4d.
前記記録紙搬送機構７は、歯付のタイミングベルトで
形成された無端状のグリッパ搬送ベルト10,10（他方の
グリッパ搬送ベルト10は第２図では図示しない）と、歯
付のタイミングベルトで形成された無端状の記録紙搬送
ベルト11a〜11cとで構成されている。このグリッパ搬送
ベルト10,10は、搬送する記録紙の幅方向両側に配置さ
れたプーリ14,14、15,15（他方のプーリ14,15は第２図
では図示しない）に掛け渡されている。また、このグリ
ッパ搬送ベルト10,10には、後述するように記録紙の先
端部を掴むグリッパが所定の配置間隔を置いて複数個取
り付けられている。プーリ15は駆動側であり図示しない
駆動系に接続されている。The recording paper transport mechanism 7 includes endless gripper transport belts 10 and 10 formed by a toothed timing belt (the other gripper transport belt 10 is not shown in FIG. 2), and a timing belt formed by a toothed timing belt. And endless recording paper transport belts 11a to 11c. The gripper transport belts 10, 10 are stretched over pulleys 14, 14, 15, 15 (the other pulleys 14, 15 are not shown in FIG. 2) arranged on both sides in the width direction of the recording paper to be transported. . Further, as described later, a plurality of grippers for gripping the leading end of the recording paper are attached to the gripper transport belts 10, 10 at predetermined intervals. The pulley 15 is on the drive side and is connected to a drive system (not shown).
このように構成されたマルチドラム型カラー画像記録
装置によるカラー画像の記録は次の手順で行われる。The recording of a color image by the multi-drum type color image recording apparatus thus configured is performed in the following procedure.
記録に際しては、用紙カセット８に収納されている記
録紙16をピックアップローラ９により記録紙搬送機構７
に繰り出すと同時に、各感光ドラム1a〜1dに順次各色の
信号に相当する潜像を形成する。潜像の形成は、各感光
ドラム1a〜1dの表面に対応する帯電器2a〜2dにより一様
に帯電させ、この上に露光光学系3a〜3dで露光すること
により行われる。これらの潜像は、現像器4a〜4dにより
現像されて、イエロー、マゼンタ、シアン、ブラックの
各カラートナー像となる。繰り出された記録紙16はその
先端の一部が、グリッパ搬送ベルト10に設けられたグリ
ッパにより掴まれて、さらに、記録紙搬送ベルト11a〜1
1cにより、各感光ドラム1a〜1dの下を通るように搬送さ
れる。この際、各転写器5a〜5dにより、各感光ドラム1a
〜1d上のトナー像は記録紙16上に重ねて転写される。そ
の後、記録紙16が定着ユニット13を通過する際に各色の
トナー像の定着が行われ、定着を完了した記録紙16は用
紙トレイ12上に排出される。At the time of recording, the recording paper 16 stored in the paper cassette 8 is moved by the pickup roller 9 to the recording paper transport mechanism 7.
At the same time, a latent image corresponding to each color signal is sequentially formed on each of the photosensitive drums 1a to 1d. The formation of the latent image is performed by uniformly charging the surfaces of the respective photosensitive drums 1a to 1d by the corresponding chargers 2a to 2d, and exposing the surfaces with the exposure optical systems 3a to 3d. These latent images are developed by the developing units 4a to 4d to become yellow, magenta, cyan, and black color toner images. A part of the leading end of the fed recording paper 16 is gripped by a gripper provided on the gripper transport belt 10, and further, the recording paper transport belts 11a to 11a
By 1c, the photosensitive drums 1a to 1d are conveyed so as to pass below them. At this time, each of the transfer devices 5a to 5d causes each of the photosensitive drums 1a
The toner images on .about.1d are transferred onto the recording paper 16 in an overlapping manner. Thereafter, when the recording paper 16 passes through the fixing unit 13, the toner images of the respective colors are fixed, and the recording paper 16 on which the fixing is completed is discharged onto the paper tray 12.
このようなマルチドラム型カラー画像記録装置では、
記録速度を速くすることが容易である反面、記録紙上で
の各色のトナー像の転写位置を合わせることが困難であ
り、記録紙を精度良く安定に搬送することが大きな課題
となっている。In such a multi-drum type color image recording apparatus,
While it is easy to increase the recording speed, it is difficult to match the transfer positions of the toner images of each color on the recording paper, and there is a great problem of accurately and stably transporting the recording paper.
このマルチドラム型カラー画像記録装置の記録紙搬送
機構７をさらに詳しく説明すると、第３図乃至第７図に
示すようになっている。The recording paper transport mechanism 7 of the multi-drum type color image recording apparatus will be described in more detail with reference to FIGS. 3 to 7.
第３図は駆動側のプーリ15,15側からこの記録紙搬送
機構７を見た斜視図、第４図はグリッパ搬送ベルト10,1
0間に取り付けるグリッパの部分の斜視図であり、駆動
側のプーリ15,15は駆動シャフト17の両端部に取り付け
られている。また、第３図には図示されていないが、従
動側のプーリ14,14もシャフトの両端部に取り付けられ
ている。そして、これらのプーリ14,14とプーリ15,15と
の間にそれぞれグリッパ搬送ベルト10,10が掛け渡され
ている。FIG. 3 is a perspective view of the recording paper transport mechanism 7 viewed from the pulleys 15 and 15 on the driving side, and FIG. 4 is a gripper transport belt 10 and 1.
FIG. 3 is a perspective view of a portion of a gripper attached between 0, and pulleys 15 on the drive side are attached to both ends of a drive shaft 17; Although not shown in FIG. 3, the driven pulleys 14, 14 are also attached to both ends of the shaft. The gripper transport belts 10, 10 are stretched between the pulleys 14, 14, and the pulleys 15, 15, respectively.
一対のグリッパ搬送ベルト10,10の間には記録紙16の
先端部を掴むグリッパ18が所定の配置間隔を置いて複数
個取り付けられている。このグリッパ18はグリッパ搬送
ベルト10,10の間に架設された長尺の板状部材18aと、こ
の板状部材18aの上に記録紙16の先端部を掴むグリッパ
部材18bが適宜の間隔で複数個取り付けられて構成され
ている。Between the pair of gripper transport belts 10, 10, a plurality of grippers 18 for gripping the leading end of the recording paper 16 are attached at predetermined intervals. The gripper 18 includes a long plate-like member 18a spanned between the gripper transport belts 10 and 10, and a plurality of gripper members 18b holding the leading end of the recording paper 16 on the plate-like member 18a at appropriate intervals. It is configured to be attached individually.
このグリッパ18のグリッパ搬送ベルト10への取り付け
を第４図にしたがって説明する。すなわち、板状部材18
aの両端には垂直に立ち上がった取付片18cが設けられ、
この取付片18cには丸孔18dおよび弧状スロット18eが形
成されている。一方、グリッパ搬送ベルト10には一対の
取付金具18f,18fが固着され、この一対の取付金具18f,1
8fからはピン18f1,18f1が突出している。そして、一方
のピン18f1は丸孔18dに挿通され、また、他方のピン18f
1は弧状スロット18eに挿通され、これにより板状部材18
aはグリッパ搬送ベルト10,10の間に架設される。ここ
で、注目すべき点は、板状部材18aが丸孔18dに挿通され
たピン18f1の回りで回動自在となっていることであり、
これにより一対の取付金具18f,18fが駆動側のプーリ15
および従動側のプーリ14をスムーズに通過し得ることに
なる。The attachment of the gripper 18 to the gripper transport belt 10 will be described with reference to FIG. That is, the plate-like member 18
At both ends of a there is provided a vertically rising mounting piece 18c,
The mounting piece 18c has a round hole 18d and an arc-shaped slot 18e. On the other hand, a pair of mounting brackets 18f, 18f are fixed to the gripper transport belt 10, and the pair of mounting brackets 18f, 1
Pins 18f 1 and 18f 1 protrude from 8f. Then, one pin 18f 1 is inserted into the round hole 18d, and the other pin 18f 1
1 is inserted into the arc-shaped slot 18e, thereby
a is installed between the gripper transport belts 10,10. Here, it should be noted is that the plate-like member 18a is made rotatable in inserted through a pin 18f 1 around the round hole 18 d,
As a result, the pair of mounting brackets 18f, 18f
And it can pass through the driven pulley 14 smoothly.
前記板状部材18aに取り付けられたグリッパ部材18b
は、通常は適当な弾性ばねによって記録紙の掴位置に偏
倚させられており、記録紙16の先端縁を掴む際あるいは
その先端縁の掴状態を解放する際に、グリッパ部材18b
は弾性的偏倚力に抗して掴位置から解放位置に変位させ
られるようになっている。Gripper member 18b attached to the plate-like member 18a
Is normally biased by a suitable elastic spring to the gripping position of the recording paper, and when gripping the leading edge of the recording paper 16 or releasing the gripping state of the leading edge, the gripper member 18b
Is adapted to be displaced from the gripping position to the release position against an elastic biasing force.
グリッパ部材18bを掴位置から解放位置に変位させる
ために、前記駆動シャフト17にはグリッパ部材18bの数
に対応したカム盤19が取り付けられている。各カム盤19
は円盤の一部をほぼ半月形に切り取った形状をしてお
り、その弦部に突起19aが形成されている。なお、第６
図に図示されているように、従動側のプーリ14,14のシ
ャフト17′にも同様な形状のカム盤19′が取り付けられ
ている。In order to displace the gripper member 18b from the gripping position to the release position, the drive shaft 17 is provided with cam disks 19 corresponding to the number of the gripper members 18b. Each cam board 19
Has a shape in which a part of a disk is cut out in a substantially half-moon shape, and a projection 19a is formed on a chord thereof. The sixth
As shown in the figure, a cam disk 19 'having a similar shape is also attached to the shaft 17' of the driven pulleys 14, 14.
前記グリッパ18を構成する板状部材18aが駆動側のプ
ーリ15あるいは従動側のプーリ14を通過するとき、板状
部材18aはカム盤19,19′の弦部に当てられ、このとき弦
部に形成した突起19a,19a′は板状部材18aに形成された
孔を貫通してグリッパ部材18bに衝合させられ、これに
よりグリッパ部材18bは弾性的偏倚力に抗して記録紙の
掴位置から解放位置まで変位させられることになる。When the plate-shaped member 18a constituting the gripper 18 passes through the pulley 15 on the driving side or the pulley 14 on the driven side, the plate-shaped member 18a is brought into contact with the chords of the cam disks 19, 19 ', and at this time, The formed projections 19a and 19a 'pass through the holes formed in the plate-like member 18a and are brought into contact with the gripper member 18b, whereby the gripper member 18b is moved from the gripping position of the recording paper against the elastic biasing force. It will be displaced to the release position.
第３図では記録紙16が二点鎖線で示され、その記録紙
16の先端縁は、４個のグリッパ部材18bによって掴まれ
た状態となっている。また、第３図では駆動側のプーリ
15を図中矢印で示す方向に回転駆動され、そのため板状
部材18aは駆動側のプーリ15側に向かって移動させられ
ている。したがって、板状部材18aが駆動側のプーリ15
を通過することになり、このとき、グリッパ部材18bは
掴位置から解放位置まで変位させられて、記録紙16の先
端縁はグリッパ部材18bによる掴状態から解放されるこ
とになる。In FIG. 3, the recording paper 16 is indicated by a two-dot chain line.
The leading edge of 16 is in a state of being gripped by four gripper members 18b. In FIG. 3, the pulley on the driving side is shown.
15, the plate member 18a is moved toward the pulley 15 on the driving side. Therefore, the plate-like member 18a is
At this time, the gripper member 18b is displaced from the gripping position to the release position, and the leading edge of the recording paper 16 is released from the gripping state by the gripper member 18b.
このようなグリッパ部材18bの解放動作について第５
図および第６図を参照して以下に説明する。Regarding the release operation of the gripper member 18b, the fifth operation will be described.
This will be described below with reference to FIG. 6 and FIG.
第５図の（ａ）に示すように、板状部材18aが駆動側
のプーリ15に到達した時点では、グリッパ部材18bは記
録紙16の先端縁を掴んだ状態にある。板状部材18aが第
５図の（ａ）の状態から更に駆動側のプーリ15側に巻き
込まれて、第５図の（ｂ）に示す位置に来ると、板状部
材18aはカム盤19の弦部に当てられる直前となるが、こ
の時点でもグリッパ部材18bはまだ記録紙16の先端縁を
掴んだ状態にある。第５図の（ｃ）に示すように、板状
部材18aがカム盤19の弦部に完全に当てられた状態とな
ると、この弦部に形成された突起19aがグリッパ部材18b
と衝合させられて、グリッパ部材18bは弾性的偏倚力に
抗して掴位置から解放位置まで変位させられ、これによ
り記録紙16の先端縁がグリッパ部材18bによる掴状態か
ら解放させられることになる。板状部材18aが第５図の
（ｃ）に示す位置からグリッパ搬送ベルト10の下側走行
部側に向かって移動させられると、板状部材18aはカム
盤19の弦部から離れ、これによりグリッパ部材18bはこ
れに及ぼされる弾性点偏倚力でもって再び掴位置まで変
位させられることになる。As shown in FIG. 5A, when the plate member 18a reaches the pulley 15 on the driving side, the gripper member 18b is in a state of gripping the leading edge of the recording paper 16. When the plate-like member 18a is further wrapped around the pulley 15 on the driving side from the state shown in FIG. 5A and reaches the position shown in FIG. 5B, the plate-like member 18a Immediately before being applied to the chord portion, the gripper member 18b still holds the leading edge of the recording paper 16 at this time. As shown in FIG. 5 (c), when the plate-like member 18a is completely brought into contact with the chord of the cam board 19, the projection 19a formed on the chord becomes the gripper member 18b.
The gripper member 18b is displaced from the gripping position to the release position against the elastic biasing force, whereby the leading edge of the recording paper 16 is released from the gripping state by the gripper member 18b. Become. When the plate-like member 18a is moved from the position shown in FIG. 5C toward the lower traveling portion side of the gripper transport belt 10, the plate-like member 18a moves away from the chord portion of the cam disk 19, whereby The gripper member 18b is again displaced to the gripping position by the elastic point biasing force exerted thereon.
第６図には板状部材18aが従動側のプーリ14を通過す
る際のグリッパ部材18bの解放作動が示されている。こ
の解放作動は第５図に示した場合と実質的に同じであ
る。すなわち、第６図の（ａ）に示すように、グリッパ
18を構成する板状部材18aが従動側のプーリ14に到達し
た時点では、グリッパ部材18bは掴位置である。板状部
材18aが（ａ）の状態から更にプーリ14側に巻き込まれ
て（ｂ）に示す位置に来ると、グリッパ部材18bはカム
盤19′の弦部に当てられる直前となるが、この時点でも
グリッパ部材18bはまだ掴位置である。（ｃ）に示すよ
うに板状部材18aがカム盤19′に完全に当てられた位置
になると、突起19a′がグリッパ部材18bと衝合させられ
て、グリッパ部材18bは弾性的偏倚力に抗して掴位置か
ら解放位置まで変位させられる。このようなグリッパ部
材18bの解放状態は板状部材18aがグリッパ搬送ベルト10
の上側走行部に向かってほぼ水平状態となるまで維持さ
れ、その間に前記ピックアップローラ９から給紙された
記録紙16の先端縁がグリッパ部材18bによって捉えら
れ、板状部材18aがカム盤19′の弦部から離れると、グ
リッパ部材18bは弾性的偏倚力でもって掴位置に偏倚さ
せられて、記録紙16の先端縁はグリッパ部材18bによっ
て確実に掴まれ、その後、板状部材18aの移動に伴って
記録紙16は搬送させられることになる。FIG. 6 shows the releasing operation of the gripper member 18b when the plate-like member 18a passes through the driven pulley 14. This release operation is substantially the same as that shown in FIG. That is, as shown in FIG.
When the plate-like member 18a forming the member 18 reaches the driven pulley 14, the gripper member 18b is at the gripping position. When the plate-like member 18a is further wrapped around the pulley 14 side from the state of (a) and comes to the position shown in (b), the gripper member 18b is immediately before being brought into contact with the chord of the cam board 19 '. However, the gripper member 18b is still at the gripping position. When the plate-like member 18a comes to a position where the plate-like member 18a is completely brought into contact with the cam disk 19 'as shown in FIG. 9C, the projection 19a' is brought into abutment with the gripper member 18b, and the gripper member 18b resists the elastic biasing force. To be displaced from the gripping position to the release position. In such a released state of the gripper member 18b, the plate-like member 18a is
The recording paper 16 fed from the pickup roller 9 is caught by the gripper member 18b while the plate-like member 18a is held by the cam plate 19 '. Away from the chord, the gripper member 18b is biased to the gripping position by an elastic biasing force, and the leading edge of the recording paper 16 is reliably gripped by the gripper member 18b, and then the plate-like member 18a is moved. Accordingly, the recording paper 16 is conveyed.
なお、第３図ではグリッパ18は１個だけ示されている
が、実際には一対のグリッパ搬送ベルト10,10の走行方
向に沿って適当な間隔で複数個のグリッパ18が取り付け
られていることは言うまでもない。Although only one gripper 18 is shown in FIG. 3, a plurality of grippers 18 are actually mounted at appropriate intervals along the traveling direction of the pair of gripper transport belts 10, 10. Needless to say.
また、第３図では示されていないが、グリッパ搬送ベ
ルト10,10と各感光ドラム1a〜1dとで囲まれた位置に、
それぞれ記録紙搬送ベルト11a〜11cがその上面をグリッ
パ18とほぼ同一面になるように配設されている。Although not shown in FIG. 3, at positions surrounded by the gripper transport belts 10, 10 and the photosensitive drums 1a to 1d,
Each of the recording paper transport belts 11a to 11c is disposed so that the upper surface thereof is substantially flush with the gripper 18.
第７図に示すように、この記録紙搬送ベルト11a〜11c
は、その周速がグリッパ搬送ベルト10,10の周速と等し
く回動し、周長がグリッパ搬送ベルト10,10に取り付け
た各グリッパ18の取付け間隔に等しくなっており、か
つ、各記録紙搬送ベルト11a〜11cの一箇所にグリッパ18
が嵌合する凹部20が形成されている。そして、この記録
紙搬送ベルト11a〜11cに形成した凹部20とこれに嵌合し
たグリッパ18の位置を同期させて回動させることによ
り、記録紙搬送ベルト11a〜11cとグリッパ搬送ベルト1
0,10に取り付けたグリッパ18とが互いに干渉せず、か
つ、記録紙16を感光ドラム1a〜1d面に接触させる高さに
支持することができる。As shown in FIG. 7, the recording paper transport belts 11a to 11c
Has a circumferential speed that is equal to the circumferential speed of the gripper transport belts 10, 10, the circumferential length is equal to the mounting interval of each gripper 18 mounted on the gripper transport belts 10, 10, and the recording paper Gripper 18 is provided at one location of the conveyor belts 11a to 11c.
A recess 20 is formed in which is fitted. The concave portions 20 formed in the recording paper transport belts 11a to 11c and the positions of the grippers 18 fitted thereto are rotated in synchronization with each other, whereby the recording paper transport belts 11a to 11c and the gripper transport belt 1 are rotated.
The grippers 18 attached to the recording papers 0 and 10 do not interfere with each other and can support the recording paper 16 at a height at which the recording paper 16 comes into contact with the surfaces of the photosensitive drums 1a to 1d.
従来の記録紙搬送機構では、記録紙搬送ベルトの周長
をグリッパの取付け間隔に等しくしている。そのため、
記録装置の全長を短くするために、各感光ドラムの間隔
を小さくすると、記録紙搬送ベルトを縦に長く引き回さ
なければならず、したがって、記録装置の高さが高くな
り、記録装置の小型化の障害となっていた。In the conventional recording paper transport mechanism, the circumference of the recording paper transport belt is made equal to the gripper mounting interval. for that reason,
If the interval between the photosensitive drums is reduced in order to shorten the overall length of the recording apparatus, the recording paper transport belt must be extended vertically, and thus the height of the recording apparatus increases, and the size of the recording apparatus becomes small. Had been an obstacle to the transformation.
この発明は、このような課題に鑑みて創案したもので
あり、記録紙搬送ベルトの周長を従来より短くすること
ができ、記録紙搬送機構の高さを低くし、それによって
記録装置の小型化、コストの低下を図ることを目的とし
たものである。The present invention has been made in view of such a problem, and can reduce the circumference of the recording paper transport belt compared to the related art, reduce the height of the recording paper transport mechanism, and thereby reduce the size of the recording apparatus. It is intended to reduce the cost and cost.
この発明は、前記のような課題を解決するため、第１
図に示すように、記録紙の先端部を掴んで搬送するグリ
ッパ18の両端に取り付けた一対の無端状のグリッパ搬送
ベルト10と、この無端状のグリッパ搬送ベルト10と感光
ドラム1a〜1dとの間にそれぞれ配設した複数の無端状の
記録紙搬送ベルト11a〜11cとよりなり、この記録紙搬送
ベルト11a〜11cの表面の高さを前記グリッパ18の上面の
高さにほぼ一致させ、かつ、グリッパ18が記録紙搬送ベ
ルト11a〜11cに干渉しないように、このグリッパ18が嵌
合する凹部20を、この記録紙搬送ベルト11a〜11c上に形
成するとともに、この凹部20とグリッパ18の位置を同期
させて回動させるようにした記録装置の記録紙搬送機構
７において、前記記録紙搬送ベルト11a〜11cの周長を、
グリッパ18の取り付け間隔のn/mとし（n,mは整数）、前
記凹部20を記録紙搬送ベルト11a〜11c上のｎ箇所に形成
したことを特徴とする記録装置の記録紙搬送機構とした
ものである。SUMMARY OF THE INVENTION The present invention provides a
As shown in the figure, a pair of endless gripper transport belts 10 attached to both ends of a gripper 18 that grips and transports the leading end of the recording paper, and a pair of the endless gripper transport belt 10 and the photosensitive drums 1a to 1d. And a plurality of endless recording paper transport belts 11a to 11c, each of which has a surface height substantially equal to the height of the upper surface of the gripper 18, and In order to prevent the gripper 18 from interfering with the recording paper transport belts 11a to 11c, a concave portion 20 into which the gripper 18 fits is formed on the recording paper transport belts 11a to 11c, and the positions of the concave portion 20 and the gripper 18 are set. In the recording paper transport mechanism 7 of the recording apparatus in which the recording paper transport belts 11a to 11c are rotated in synchronization with each other,
The recording paper transport mechanism of the recording apparatus is characterized in that the attachment interval of the gripper 18 is set to n / m (n and m are integers), and the concave portion 20 is formed at n places on the recording paper transport belts 11a to 11c. Things.
この発明は、前記のような手段により、記録紙の最大
長に応じて決定される一対の無端状のグリッパ搬送ベル
ト10へのグリッパ18の取り付け間隔に対して、記録紙搬
送ベルト11a〜11cの周長を従来より短くすることがで
き、記録紙搬送機構７の高さを低くし、それによって記
録装置の小型化およびコストの低下を図ることができ
る。According to the present invention, the recording paper transport belts 11a to 11c can be mounted on the pair of endless gripper transport belts 10 at intervals determined by the means described above according to the maximum length of the recording paper. The circumference can be made shorter than before, and the height of the recording paper transport mechanism 7 can be reduced, thereby reducing the size and cost of the recording apparatus.
以下、この発明の実施例を図面を用いて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図はこの発明の記録装置の記録紙搬送機構の実施
例を示す図であり、前記従来例と同一部には同一符号を
付けて説明する。すなわち、所定間隔で配設した一対の
無端状のグリッパ搬送ベルト10,10の間に、複数のグリ
ッパ18が一定の間隔で取り付けられている。このグリッ
パ18の取り付け間隔は、各グリッパ18間に記録紙の全長
を収容できる距離が必要であり、記録装置の使用する記
録紙の最大長に応じて決定されている。FIG. 1 is a view showing an embodiment of a recording paper transport mechanism of a recording apparatus according to the present invention. The same parts as those in the conventional example are denoted by the same reference numerals. That is, a plurality of grippers 18 are attached at regular intervals between a pair of endless gripper transport belts 10, 10 arranged at predetermined intervals. The mounting interval of the grippers 18 needs to be large enough to accommodate the entire length of the recording paper between the grippers 18, and is determined according to the maximum length of the recording paper used by the recording apparatus.
記録紙は転写時に感光ドラム1a〜1dに接触する必要が
あり、したがって、グリッパ搬送ベルト10,10と各感光
ドラムとで囲まれた位置に、記録紙搬送ベルト11a〜11c
がその上面をグリッパ18とほぼ同一面になるように配設
されている。そして、記録紙の先端縁はグリッパ18の上
面にほぼ一致する位置に掴まれている。このようにする
には、後述するような手段によって、グリッパ18は各感
光ドラム1a〜1dおよび各記録紙搬送ベルト11a〜11cとの
干渉を避けねばならない。The recording paper must contact the photosensitive drums 1a to 1d at the time of transfer.Therefore, the recording paper transport belts 11a to 11c are located at positions surrounded by the gripper transport belts 10, 10 and the respective photosensitive drums.
Are arranged such that the upper surface thereof is substantially flush with the gripper 18. The leading edge of the recording paper is gripped at a position substantially coincident with the upper surface of the gripper 18. To do so, the gripper 18 must avoid interference with the photosensitive drums 1a to 1d and the recording paper transport belts 11a to 11c by means described later.
この記録紙搬送ベルト11a〜11cの周長は、グリッパ18
の取り付け間隔のn/m（n,mは整数）、第１図に示す実施
例では2/3になっている。また、この記録紙搬送ベルト1
1a〜11cは、図示しないが歯付のタイミングベルトで構
成され、その背面に低硬度のゴムスポンジを張り合わせ
ることにより、肉厚を増している。各記録紙搬送ベルト
11a〜11cのｎ箇所、この実施例においては２箇所に、ゴ
ムスポンジの無い外周が凹んだ凹部20が形成されてい
る。この凹部20は、前記グリッパ18の長さ、厚さ共に収
まる大きさになっている。各記録紙搬送ベルト11a〜11c
は、各感光ドラム1a〜1dに対応する転写器5a〜5dの間に
設けられ、上側に前記グリッパ18の上面とほぼ同一の平
面をつくるようにプーリ21,21の間に掛け渡されてい
る。The circumference of the recording paper transport belts 11a to 11c is
The attachment interval is n / m (n and m are integers), which is 2/3 in the embodiment shown in FIG. Also, this recording paper transport belt 1
Each of 1a to 11c is constituted by a toothed timing belt (not shown), and the thickness thereof is increased by attaching a low-hardness rubber sponge to the back surface thereof. Each recording paper transport belt
In n places 11a to 11c, two places in this embodiment, concave portions 20 having no rubber sponge and having a concave outer periphery are formed. The recess 20 is sized to accommodate both the length and the thickness of the gripper 18. Each recording paper transport belt 11a to 11c
Is provided between the transfer units 5a to 5d corresponding to the respective photosensitive drums 1a to 1d, and is bridged between the pulleys 21 and 21 so as to form a plane substantially the same as the upper surface of the gripper 18 on the upper side. .
グリッパ搬送ベルト10,10と各記録紙搬送ベルト11a〜
11cは等しい速度で回動する。各ベルトの直線移動する
部分の速度は、各プーリのピッチ円半径と回転速度によ
って決まるため、それぞれ歯付のグリッパ搬送ベルト1
0,10と各記録紙搬送ベルト11a〜11cの速度は、各プーリ
の駆動軸を各プーリの外周に形成した歯数に応じて一定
の速度比で回転させれば容易に一致させることができ
る。各記録紙搬送ベルト11a〜11cの上面は、先端をグリ
ッパ18で掴まれた記録紙の後部が垂れ下がらないように
支持する高さに調整されている。グリッパ18の搬送周期
１ピッチにつき、すなわち、次のグリッパ18が回動して
来るまでに各記録紙搬送ベルト11a〜11cは1.5回回動
し、グリッパ18は各記録紙搬送ベルト11a〜11cの凹部20
に丁度合う位置にあって回動されるため、グリッパ18と
各記録紙搬送ベルト11a〜11cとが干渉しないようになっ
ている。Gripper transport belts 10 and each recording paper transport belt 11a to
11c rotates at the same speed. The speed of the linearly moving portion of each belt is determined by the pitch circle radius and the rotation speed of each pulley.
The speeds of 0, 10 and each of the recording paper transport belts 11a to 11c can be easily matched by rotating the drive shaft of each pulley at a constant speed ratio according to the number of teeth formed on the outer periphery of each pulley. . The upper surface of each of the recording paper transport belts 11a to 11c is adjusted to a height at which the rear end of the recording paper gripped by the gripper 18 is supported so as not to hang down. Each recording paper transport belt 11a to 11c rotates 1.5 times for one pitch of the transport cycle of the gripper 18, that is, until the next gripper 18 rotates, and the gripper 18 becomes a concave portion of each of the recording paper transport belts 11a to 11c. 20
The gripper 18 and the recording paper transport belts 11a to 11c do not interfere with each other.
記録紙の後部では、各記録紙搬送ベルト11a〜11cの凹
部20にかかる部分があるが、この凹部20の幅や長さは十
分短く、また、記録紙にはいわゆる“こし”があるた
め、この部分で記録紙が撓んでしまうことはない。In the rear part of the recording paper, there is a portion that covers the concave portion 20 of each of the recording paper transport belts 11a to 11c. However, since the width and length of the concave portion 20 are sufficiently short, and the recording paper has a so-called "strain", The recording paper does not bend at this portion.
各転写器5a〜5dでは記録紙を下側から支持するものは
なく、転写電界が一様に加わるため転写むらのない高品
質の画像が得られる。この転写紙5a〜5dで記録紙搬送ベ
ルト11a〜11cによって下側から支持されない部分は十分
短く、また、記録紙が存在する特には転写電界が加わる
ため、記録紙は各感光ドラム1a〜1dに静電吸着し、垂れ
下がることはない。In each of the transfer units 5a to 5d, there is no support for the recording paper from below, and a high-quality image without transfer unevenness is obtained because the transfer electric field is uniformly applied. The portions of the transfer papers 5a to 5d that are not supported from below by the recording paper transport belts 11a to 11c are sufficiently short.Moreover, since the recording paper is present, and particularly a transfer electric field is applied, the recording paper is applied to each photosensitive drum 1a to 1d. It is electrostatically attracted and does not hang down.
なお、以上説明した実施例においては、各記録紙搬送
ベルト11a〜11cの周長を、グリッパ18の取付け間隔の2/
3とし、凹部20を各記録紙搬送ベルト11a〜11c上の２箇
所に設けたが、他の実施例として、各記録紙搬送ベルト
11a〜11cの周長を、グリッパ18の取付け間隔の整数分の
１とし、凹部20を各記録紙搬送ベルト11a〜11c上の１箇
所に設けても実施可能である。In the embodiment described above, the circumferential length of each of the recording paper transport belts 11a to 11c is set to 2 / (the mounting interval of the gripper 18).
3, and two concave portions 20 are provided on each of the recording paper transport belts 11a to 11c.
The present invention is also applicable to a case in which the circumference of 11a to 11c is set to a fraction of the mounting interval of the gripper 18, and the recess 20 is provided at one place on each of the recording paper transport belts 11a to 11c.
この発明は、以上説明したように、記録紙の先端部を
掴んで搬送するグリッパの両端に取り付けた一対の無端
状のグリッパ搬送ベルトと、この無端状のグリッパ搬送
ベルトと感光ドラムとの間にそれぞれ配設した複数の無
端状の記録紙搬送ベルトとよりなり、この記録紙搬送ベ
ルトの表面の高さを前記グリッパの高さにほぼ一致さ
せ、かつ、グリッパが記録紙搬送ベルトに干渉しないよ
うにこのグリッパが嵌合する凹部を、この記録紙搬送ベ
ルト上に形成するとともに、この凹部とグリッパの位置
を同期させて回動させるようにした記録装置の記録紙搬
送機構において、前記記録紙搬送ベルトの周長を、グリ
ッパの取り付け間隔のn/mとし（n,mは整数）、前記凹部
を記録紙搬送ベルト上のｎ箇所に形成したことを特徴と
する記録装置の記録紙搬送機構としたので、記録紙搬送
ベルトの周長を従来より短くすることができ、記録紙搬
送機構の高さを低くし、それによって記録装置の小型化
およびコストの低下を図ることができる。As described above, according to the present invention, a pair of endless gripper transport belts attached to both ends of a gripper for gripping and transporting the leading end of a recording sheet, and between the endless gripper transport belt and the photosensitive drum A plurality of endless recording paper transport belts, each of which is arranged so that the height of the surface of the recording paper transport belt is substantially equal to the height of the gripper, and the gripper does not interfere with the recording paper transport belt. The recording paper transport mechanism of the recording apparatus, wherein a concave portion in which the gripper is fitted is formed on the recording paper transport belt, and the concave portion and the position of the gripper are rotated in synchronization with each other. The belt has a circumferential length of n / m (n and m are integers) of a gripper mounting interval, and the concave portion is formed at n positions on the recording paper transport belt. Since the mechanism, the circumferential length of the recording paper conveying belt can be made shorter than conventionally, to reduce the height of the recording paper transport mechanism, whereby it is possible to reduce the size and costs of the recording apparatus.
第１図はこの発明の記録装置の記録紙搬送機構の実施例
を示す図、第２図は従来一般のマルチドラム型カラー画
像記録装置の概略を示す図、第３図はこのマルチドラム
型カラー画像記録装置を構成する従来の記録紙搬送機構
を駆動側のプーリ側から見た斜視図、第４図は同グリッ
パ搬送ベルト間に取り付けるグリッパの部分の斜視図、
第５図および第６図は同グリッパによる記録紙の掴み、
および解放動作の説明図、第７図は同記録紙搬送機構を
構成するグリッパ搬送ベルトと記録紙搬送ベルトの部分
を詳細に示した図である。 1a〜1d……感光ドラム 2a〜2d……帯電器 3a〜3d……露光光学系 4a〜4d……現像器 5a〜5d……転写器 6a〜6d……クリーナ ７……記録紙搬送機構 ８……用紙カセット ９……ピックアップローラ 10……グリッパ搬送ベルト 11a〜11c……記録紙搬送ベルト 12……用紙トレイ 13……定着ユニット 14……プーリ 15……プーリ 16……記録紙 17……駆動シャフト 18……グリッパ 18a……板状部材 18b……グリッパ部材 18c……取付片 18d……丸孔 18e……弧状スロット 18f……取付金具 18f1……ピン 19,19′……カム盤 19a,19a′……突起 20……凹部 21……プーリFIG. 1 is a view showing an embodiment of a recording paper transport mechanism of a recording apparatus of the present invention, FIG. 2 is a view schematically showing a conventional general multi-drum type color image recording apparatus, and FIG. FIG. 4 is a perspective view of a conventional recording paper transport mechanism constituting the image recording apparatus as viewed from a pulley side on a driving side; FIG. 4 is a perspective view of a gripper portion attached between the gripper transport belts;
FIGS. 5 and 6 show the gripper gripping the recording paper.
FIG. 7 is a view showing the gripper transport belt and the recording paper transport belt constituting the recording paper transport mechanism in detail. 1a to 1d photosensitive drums 2a to 2d chargers 3a to 3d exposure optical systems 4a to 4d developing devices 5a to 5d transfer devices 6a to 6d cleaners 7 recording paper transport mechanism 8 Paper cassette 9 Pickup roller 10 Gripper transport belt 11a to 11c Recording paper transport belt 12 Paper tray 13 Fixing unit 14 Pulley 15 Pulley 16 Recording paper 17 Drive shaft 18 Gripper 18a Plate member 18b Gripper member 18c Mounting piece 18d Round hole 18e Arc-shaped slot 18f Mounting bracket 18f 1 Pin 19, 19 ' 19a, 19a '... Projection 20 ... Recess 21 ... Pulley
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−216169（ＪＰ，Ａ) 特開 平２−257164（ＪＰ，Ａ) 特開 平２−166474（ＪＰ，Ａ) 実開 昭62−194639（ＪＰ，Ｕ) 実開 昭62−103557（ＪＰ，Ｕ) 実開 昭62−100951（ＪＰ，Ｕ) 実開 昭58−191156（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-216169 (JP, A) JP-A-2-257164 (JP, A) JP-A-2-166474 (JP, A) 194639 (JP, U) Japanese Utility Model Showa 62-103557 (JP, U) Japanese Utility Model Showa 62-100951 (JP, U) Japanese Utility Model Showa 58-191156 (JP, U)
Claims (1)
（18）の両端に取り付けた一対の無端状のグリッパ搬送
ベルト（10）と、この無端状のグリッパ搬送ベルト（1
0）と感光ドラム（1a〜1d）との間にそれぞれ配設した
複数の無端状の記録紙搬送ベルト（11a〜11c）とよりな
り、この記録紙搬送ベルト（11a〜11c）の表面の高さを
前記グリッパ（18）の上面の高さにほぼ一致させ、か
つ、グリッパ（18）が記録紙搬送ベルト（11a〜11c）に
干渉しないようにこのグリッパ（18）が嵌合する凹部
（20）を、この記録紙搬送ベルト（11a〜11c）上に形成
するとともに、この凹部（20）とグリッパ（18）の位置
を同期させて回動させるようにした記録装置の記録紙搬
送機構（７）において、 前記記録紙搬送ベルト（11a〜11c）の周長を、グリッパ
（18）の取り付け間隔のn/mとし（n,mは整数）、前記凹
部（20）を記録紙搬送ベルト（11a〜11c）上のｎ箇所に
形成したことを特徴とする記録装置の記録紙搬送機構。A pair of endless gripper transport belts (10) attached to both ends of a gripper (18) for gripping and transporting the leading end of a recording paper, and the endless gripper transport belt (1).
0) and the photosensitive drums (1a to 1d) and a plurality of endless recording paper transport belts (11a to 11c), respectively. The height of the surface of the recording paper transport belt (11a to 11c) is increased. The height of the gripper (18) is approximately equal to the height of the upper surface of the gripper (18), and the recess (20) into which the gripper (18) fits so that the gripper (18) does not interfere with the recording paper transport belt (11a to 11c). ) Are formed on the recording paper transport belts (11a to 11c), and the positions of the recess (20) and the gripper (18) are rotated in synchronization with each other. In (1), the circumference of the recording paper transport belt (11a to 11c) is set to n / m (n and m are integers) of an attachment interval of the gripper (18), and the concave portion (20) is formed by 11c) A recording paper transport mechanism for a recording apparatus, wherein the recording paper transport mechanism is formed at n positions above.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1277710A JP2750543B2 (en) | 1989-10-25 | 1989-10-25 | Recording paper transport mechanism of recording device |
| US07/480,684 US4972234A (en) | 1989-02-17 | 1990-02-15 | Endless belt with recess for receiving sheet feeding grippers |
| DE69011892T DE69011892T2 (en) | 1989-02-17 | 1990-02-16 | Sheet feeder. |
| EP90301676A EP0383612B1 (en) | 1989-02-17 | 1990-02-16 | Sheet transporting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1277710A JP2750543B2 (en) | 1989-10-25 | 1989-10-25 | Recording paper transport mechanism of recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03138667A JPH03138667A (en) | 1991-06-13 |
| JP2750543B2 true JP2750543B2 (en) | 1998-05-13 |
Family
ID=17587237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1277710A Expired - Fee Related JP2750543B2 (en) | 1989-02-17 | 1989-10-25 | Recording paper transport mechanism of recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2750543B2 (en) |
-
1989
- 1989-10-25 JP JP1277710A patent/JP2750543B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03138667A (en) | 1991-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4972234A (en) | Endless belt with recess for receiving sheet feeding grippers | |
| JPH0915990A (en) | Image forming device and belt transporting device as well as image forming method | |
| US4739371A (en) | Low cost belt module | |
| JP2750543B2 (en) | Recording paper transport mechanism of recording device | |
| JP2660930B2 (en) | Image forming device | |
| JP3911921B2 (en) | Continuous paper processing device and tractor | |
| JP3001993B2 (en) | Image carrier belt traveling device | |
| JPH05134486A (en) | Belt driving device for image forming device | |
| JP3596747B2 (en) | Image forming device | |
| JPS6041568Y2 (en) | Sheet conveyance device in electronic copying machine | |
| JPH0414755Y2 (en) | ||
| JP3074054B2 (en) | Image forming device | |
| JPH09169448A (en) | Image forming device | |
| JPH03253876A (en) | Color recorder | |
| JPH03251866A (en) | Color recorder | |
| JPH0551147A (en) | Sheet conveyor device for electrophotographic device | |
| JP2769356B2 (en) | Multicolor image forming device | |
| JPH03261974A (en) | Color recording device | |
| JP2663950B2 (en) | Recording paper transport mechanism | |
| JP3919397B2 (en) | Image forming apparatus | |
| JPH0662240B2 (en) | Sheet separation device | |
| JPH07152216A (en) | Image forming device | |
| JP2535405Y2 (en) | Image forming device | |
| JP3306225B2 (en) | Paper transport device | |
| JPH02105186A (en) | Image forming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |