JPH0223133A - Sheet delivery equipment - Google Patents

Sheet delivery equipment

Info

Publication number
JPH0223133A
JPH0223133A JP17422288A JP17422288A JPH0223133A JP H0223133 A JPH0223133 A JP H0223133A JP 17422288 A JP17422288 A JP 17422288A JP 17422288 A JP17422288 A JP 17422288A JP H0223133 A JPH0223133 A JP H0223133A
Authority
JP
Japan
Prior art keywords
suction
sheet
upper opening
suction fan
air
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
JP17422288A
Other languages
Japanese (ja)
Other versions
JP2744018B2 (en
Inventor
Hisao Nakajima
中島 久男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP63174222A priority Critical patent/JP2744018B2/en
Publication of JPH0223133A publication Critical patent/JPH0223133A/en
Application granted granted Critical
Publication of JP2744018B2 publication Critical patent/JP2744018B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To exactly suck and deliver a sheet without reduction in suction force by mounting a plurality of independent suction passages which guide suction air from an endless belt to a suction fan. CONSTITUTION:A delivery belt 2 is turned by driving rollers 9 and 10 and a suction fan 6 turns. The suction air generated by the turning of the suction fan 6 absorbs a sheet S on the delivery belt 2 via suction passages 4a to 4d of a suction duct 4 and the suction holes 3... of the delivery belt 2. When the sheet S reaches the position above the upper opening part 5a of the suction passage 4a at the upper side, the sheet S is absorbed up onto the delivery belt 2 by the force of the suction air in the suction passage 4a and delivered along with the turning of the delivery belt 2. At this time if the upper opening parts 5b to 5d except the upper opening part 5a are not covered with the sheet S, the quantity of suction air at the upper opening part 5a covered with the sheet S will not be reduced since the suction passages 4a to 4d are independent from each other.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 本発明は、複写機、プリンタ等の画像形成装置に配置さ
れてシートを搬送するシート搬送装置に係り、詳しくは
、ファンの吸気によって生じた負圧によりシートを搬送
ベルトに吸着して搬送するシート搬送装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a sheet conveying device disposed in an image forming apparatus such as a copying machine or a printer to convey sheets. The present invention relates to a sheet conveyance device that conveys a sheet by attracting it to a conveyance belt using negative pressure.

(■)従来の技術 従来、吸引ファンの吸気によフて生じる負圧を用いて、
シートを搬送ベルト上に吸着して搬送するシート搬送装
置がある。該シート搬送装置は、多数の吸引孔をもつ無
端の搬送ベルトと吸気を発生させる吸引プアンを有して
おり、またこれら搬送ベルトと吸引ファンとの間に吸気
ダクトを備えていて、該吸気ダクト及び上記吸引孔を介
して搬送ベルト上のシートを吸引するようになっている
。そして、上記吸気ダクトは、上記搬送ベルトに対向す
る複数の上開口部と吸引ファンに対向する下開口部を有
し、下開口部から複数の上開口部に枝分れするように分
岐する1個の吸気路をもっている。
(■) Conventional technology Conventionally, using the negative pressure generated by the intake air of a suction fan,
There is a sheet conveyance device that conveys a sheet by adsorbing it onto a conveyor belt. The sheet conveyance device has an endless conveyance belt with a large number of suction holes and a suction fan that generates suction air, and also includes an air intake duct between the conveyance belt and the suction fan. The sheet on the conveyor belt is sucked through the suction hole. The intake duct has a plurality of upper openings facing the conveyor belt and a lower opening facing the suction fan, and the intake duct branches from the lower opening into a plurality of upper openings. It has separate air intake passages.

(ハ)発明が解決しようとする課題 ところで、上述シート搬送装置では、搬送するシートの
サイズが小さかったり、またはシートの搬送初期及び終
期には、シートが複数の上開口部のすべてを被えない場
合がある。この場合、吸引ファンにより生じた吸気が抵
抗の少ないシートに被われていない上開口部に集中して
、シートに被われた上開口部でのシート吸引力が低下し
て、シートの搬送力を失する虞れがある。
(c) Problems to be Solved by the Invention By the way, in the above-mentioned sheet conveyance device, the size of the sheet to be conveyed is small, or the sheet does not cover all of the plurality of upper openings at the beginning and end of sheet conveyance. There are cases. In this case, the intake air generated by the suction fan concentrates on the upper opening that is not covered by the sheet, which has less resistance, and the sheet suction force at the upper opening that is covered by the sheet decreases, reducing the sheet conveyance force. There is a risk of losing it.

(ニ)  課題を解決するための手段 本発明は、上述課題を解消することを目的とするもので
あって、例えば第1図及び第2図を参照して示すと、シ
ート(S)を吸引する多数の吸引孔(3−)を有する無
端ベルト(2)と、該無端ベルト(2)上にシート(S
)を吸着するように吸気する吸引ファン(6)と、を備
えてなるシート搬送装置(1)において、それぞれ一方
の開口部(5a、5b、5c、5d)を前記無端ベルト
(2)に対抗しかつ他方の開口部(8a、8b。
(d) Means for Solving the Problems The present invention aims to solve the above-mentioned problems, and for example, as shown in FIGS. 1 and 2, a sheet (S) is an endless belt (2) having a large number of suction holes (3-), and a sheet (S) on the endless belt (2);
), in which one opening (5a, 5b, 5c, 5d) is opposed to the endless belt (2). and the other opening (8a, 8b).

8c、8d)を前記吸引ファン(6)に対向して該吸引
ファン(6)の吸気を前記無端ベルト(2)から吸引フ
ァン(6)へと誘導する互いに独立した複数の吸気路(
4a、4b、4c、4d)を備えたことを特徴とするも
のである。
8c, 8d) facing the suction fan (6) and guiding the intake air of the suction fan (6) from the endless belt (2) to the suction fan (6).
4a, 4b, 4c, 4d).

(1作用 上述構成に基づき、無端ベルト(2)上に送り込まれた
シート(S)が吸気路(4a、4b、4c、4d)の一
方の開口部(5a、5b、5c。
(1) Based on the above-described configuration, the sheet (S) fed onto the endless belt (2) passes through one opening (5a, 5b, 5c) of the intake path (4a, 4b, 4c, 4d).

5d)に達すると、吸引ファン(6)によって生じた吸
気が吸気路(4a、4b、4c、4d)及び無端ベルト
(2)の吸引孔(3・・・)を介してシート(S)を無
端ベルト(2)上に吸引する。そして、一方の開口部(
5a、5b、5c、5d)の全てがシート(S)に被わ
れていなくても、シート(S)に被われた吸気路におけ
る吸気が減少することがなく、シート(S)は確実に無
端ベルト(2)上に吸着され、該無端ベルト(2)の回
転に従って搬送される。
5d), the intake air generated by the suction fan (6) passes through the intake passages (4a, 4b, 4c, 4d) and the suction holes (3...) of the endless belt (2), and then the sheet (S). Suction onto the endless belt (2). And one opening (
5a, 5b, 5c, 5d) are not all covered by the sheet (S), the intake air in the intake passage covered by the sheet (S) will not decrease, and the sheet (S) will definitely be endless. It is attracted onto the belt (2) and conveyed as the endless belt (2) rotates.

なお、上記符号は参照のために示すものであって、なん
ら構成を限定するものではない。
Note that the above symbols are shown for reference and do not limit the configuration in any way.

(へ) 実施例 以下、図面に沿って、本発明の実施例について説明する
(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

複写機の機体内に配置されたシート搬送装置1は、第1
図及び第2図に示すように、対向して配置された駆動ロ
ーラ9,10を有しており、該駆動ローラ9,10はモ
ータ等の駆動源に駆動されて矢印方向に回転する。また
、該駆動ローラ9゜10には、無端の搬送ベルト2が2
条並行に巻掛けられており、該搬送ベルト2には多数の
吸引孔3・・・が設けられている。上記搬送ベルト2に
臨んで吸引ファン6が配置されており、該吸引ファン6
の回転により生じた吸気は矢印方向に放出される。
A sheet conveying device 1 disposed inside the body of the copying machine includes a first
As shown in the drawings and FIG. 2, it has drive rollers 9 and 10 that are arranged to face each other, and the drive rollers 9 and 10 are driven by a drive source such as a motor and rotate in the direction of the arrow. Further, an endless conveyor belt 2 is attached to the drive rollers 9 and 10.
The conveyor belt 2 is wound in parallel lines, and the conveyor belt 2 is provided with a large number of suction holes 3 . A suction fan 6 is arranged facing the conveyor belt 2, and the suction fan 6
The intake air generated by the rotation of is released in the direction of the arrow.

一方、上記吸引ファン6の上方には吸気ダクト4が配置
されており、該吸気ダクト4には互いに独立した4個の
上下に貫通する吸気路4a、4b、4c、4dが設けら
れている。そして、これら4個の吸気路4a、4b、4
c、4dはそれぞれ上開口部5a、5b、5c、5dを
有し、また下開口部8a、8b、8.c、8dを有して
おり、上開口部5a、5b、5c、5dが搬送ベルト2
に対向し、また下開口部8a、8b、8c、8dが吸引
ファン6に対向するようになつている。
On the other hand, an air intake duct 4 is arranged above the suction fan 6, and the air intake duct 4 is provided with four mutually independent air intake passages 4a, 4b, 4c, and 4d that penetrate vertically. These four intake paths 4a, 4b, 4
c, 4d have upper openings 5a, 5b, 5c, 5d, respectively, and lower openings 8a, 8b, 8. c, 8d, and the upper openings 5a, 5b, 5c, 5d are the conveyor belt 2.
The lower openings 8a, 8b, 8c, and 8d are arranged to face the suction fan 6.

本実施例は以上のような構成よりなるので、シートSは
他の図示しない搬送機構によって搬送ベルト2上に送り
込まれる。この際、搬送ベルト2は駆動ローラ9,10
によって回転され、また吸引ファン6が回転している。
Since this embodiment has the above-described configuration, the sheet S is fed onto the conveyor belt 2 by another conveyance mechanism (not shown). At this time, the conveyor belt 2 is
The suction fan 6 is also rotating.

そして、吸引ファン6の回転によって発生した吸気が吸
気ダクト4の各吸気路4a、4b、4c、4d及び搬送
ベルト2の各吸気孔3・・・を介して搬送ベルト2上の
シートSを吸引するようになっていて、シートSが搬送
されて上流側の吸気路4aの上開口部5a上に到達する
と、シートSは該吸気路4aにおける吸気によりて搬送
ベルト2上に吸着されて、搬送ベルト2の回転に従って
搬送される。
Then, the intake air generated by the rotation of the suction fan 6 suctions the sheet S on the conveyor belt 2 through each intake path 4a, 4b, 4c, 4d of the intake duct 4 and each intake hole 3 of the conveyor belt 2. When the sheet S is conveyed and reaches the upper opening 5a of the intake path 4a on the upstream side, the sheet S is attracted onto the conveyor belt 2 by the intake air in the intake path 4a, and the sheet S is conveyed. It is conveyed as the belt 2 rotates.

この際、上記上開口部5a以外の上開口部5b、5c、
5dがシートSに被われていなくとも、各吸気路4a、
4b、4c、4dは互いに独立していて、上記シートS
に被われた上開口部5aにおける吸気量すなわち吸引力
は減少することがない。
At this time, upper openings 5b, 5c other than the upper opening 5a,
Even if 5d is not covered by the sheet S, each intake passage 4a,
4b, 4c, and 4d are independent of each other, and the sheets S
The amount of intake air, that is, the suction force at the upper opening 5a covered by the upper opening 5a does not decrease.

そして、シートSは搬送ベルト2に吸着されて更に搬送
されて、下流側の上開口部5b上に達すると、該上開口
部5bと上流側の上開口部5aとにおけるそれぞれの吸
気によって搬送ベルト2上に吸着されて搬送される。ま
た、該シートSは、上流側の上開口部5aからはずれた
後も、下流側の上開口部5bにおいて吸気路4bの吸気
によりて吸引されて所定部まで搬送される。なお、シー
トSが他の下開口部5c、5dに到達した際にも上記同
様に搬送ベルト2上に吸着される。
Then, the sheet S is attracted to the conveyor belt 2 and further conveyed, and when it reaches the top opening 5b on the downstream side, the sheet S is sucked into the conveyor belt 2 by the suction air from the upper opening 5b and the upper opening 5a on the upstream side. 2 and transported. Further, even after the sheet S is removed from the upper opening 5a on the upstream side, it is sucked by the intake air from the air intake path 4b at the upper opening 5b on the downstream side and is conveyed to a predetermined portion. Note that when the sheet S reaches the other lower openings 5c and 5d, it is also attracted onto the conveyor belt 2 in the same manner as described above.

なお、長さの相違等吸気路4a、4b、4c。Note that the intake paths 4a, 4b, and 4c have different lengths.

4dの条件が異なる場合に、下開口部8a、8b、8c
、8dの開口面積を例えばシャッタ等を用いて増減させ
ることによって、上開口部5a。
When the conditions of 4d are different, the lower openings 8a, 8b, 8c
, 8d by increasing or decreasing the opening area of the upper opening 5a using, for example, a shutter.

5b、5c、5cにおける吸気量を同一にすることがで
きる。
The intake air amounts in 5b, 5c, and 5c can be made the same.

(ト)発明の詳細 な説明したように、本発明によれば、それぞれ無端ベル
トに対向する開口部を有し、かつ互いに独立した複数の
吸気路を備えたので、シートが無端ベルトに対向する開
口部を全て被わない場合でも、吸引力を低下させること
なくシートを無端ベルト上に確実に吸着して搬送するこ
とができる。
(g) As described in detail, according to the present invention, a plurality of air intake passages each having an opening facing the endless belt and being independent from each other are provided, so that the seat faces the endless belt. Even if the openings are not completely covered, the sheet can be reliably attracted and conveyed onto the endless belt without reducing the suction force.

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

第1図は本発明の実施例に係るシート搬送装置の側断面
図、第2図はその平面図である。 S・・・シード   1・・・シート搬送装置   2
・・・無端ベルト(搬送ベルト)   3・・・吸弓孔
   4 a 、 4 b 、 4 c 、 4 c 
・・・吸気路5 a 、 5 b 、 5 c 、 5
 c−=一方の開口部(上開口部)    6・・・吸
引ファン   8a、8b、8c、8c・・・他方の開
口部(下開口部)。
FIG. 1 is a sectional side view of a sheet conveying device according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. S... Seed 1... Sheet conveyance device 2
...Endless belt (conveyor belt) 3...Suction holes 4a, 4b, 4c, 4c
...Intake path 5a, 5b, 5c, 5
c-=one opening (upper opening) 6... suction fan 8a, 8b, 8c, 8c... other opening (lower opening).

Claims (1)

【特許請求の範囲】 1、シートを吸引する多数の吸引孔を有する無端ベルト
と、該無端ベルト上に前記シートを吸着するように吸気
する吸引ファンと、を備えてなるシート搬送装置におい
て、 それぞれ一方の開口部を前記無端ベルトに 対向しかつ他方の開口部を前記吸引ファンに対向して該
吸引ファンの吸気を前記無端ベルトから前記吸引ファン
へと誘導する互いに独立した複数の吸気路を備えたこと
を特徴とするシート搬送装置。
[Scope of Claims] 1. A sheet conveying device comprising: an endless belt having a large number of suction holes for suctioning a sheet; and a suction fan for suctioning air so as to suction the sheet onto the endless belt; A plurality of mutually independent air intake paths each having one opening facing the endless belt and the other opening facing the suction fan to guide intake air from the suction fan from the endless belt to the suction fan. A sheet conveying device characterized by:
JP63174222A 1988-07-12 1988-07-12 Sheet transport device Expired - Fee Related JP2744018B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63174222A JP2744018B2 (en) 1988-07-12 1988-07-12 Sheet transport device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63174222A JP2744018B2 (en) 1988-07-12 1988-07-12 Sheet transport device

Publications (2)

Publication Number Publication Date
JPH0223133A true JPH0223133A (en) 1990-01-25
JP2744018B2 JP2744018B2 (en) 1998-04-28

Family

ID=15974859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63174222A Expired - Fee Related JP2744018B2 (en) 1988-07-12 1988-07-12 Sheet transport device

Country Status (1)

Country Link
JP (1) JP2744018B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013054566A1 (en) * 2011-10-12 2013-04-18 株式会社コスモグラフ Page-turning reader device and feeder device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4948076A (en) * 1972-09-11 1974-05-09
JPS54115870A (en) * 1978-02-27 1979-09-08 Masaharu Matsuo Belt paper feeder
JPS6352845U (en) * 1986-09-26 1988-04-09

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4948076A (en) * 1972-09-11 1974-05-09
JPS54115870A (en) * 1978-02-27 1979-09-08 Masaharu Matsuo Belt paper feeder
JPS6352845U (en) * 1986-09-26 1988-04-09

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013054566A1 (en) * 2011-10-12 2013-04-18 株式会社コスモグラフ Page-turning reader device and feeder device
KR20140063844A (en) * 2011-10-12 2014-05-27 가부시키가이샤 코스모그래프 Page-turning reader device and feeder device
JPWO2013054566A1 (en) * 2011-10-12 2015-03-30 株式会社コスモグラフ Page turning reader and feeder device
US9077827B2 (en) 2011-10-12 2015-07-07 Cosmograph Inc. Page-turning reader device and feeder device

Also Published As

Publication number Publication date
JP2744018B2 (en) 1998-04-28

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