JPH0977337A - Paper discharge device for picture image forming device - Google Patents
Paper discharge device for picture image forming deviceInfo
- Publication number
- JPH0977337A JPH0977337A JP7238261A JP23826195A JPH0977337A JP H0977337 A JPH0977337 A JP H0977337A JP 7238261 A JP7238261 A JP 7238261A JP 23826195 A JP23826195 A JP 23826195A JP H0977337 A JPH0977337 A JP H0977337A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- paper discharge
- sheet
- guide member
- discharge
- 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
Links
- 238000007650 screen-printing Methods 0.000 abstract 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Pile Receivers (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は孔版印刷装置の排紙
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper discharge device for a stencil printing machine.
【０００２】[0002]
【従来の技術】孔版印刷装置から排出された印刷用紙が
アーチ状（上に凸の形状）となって排紙装置の排紙台上
に載置された印刷用紙は、先に積載されている印刷用紙
（以下用紙という）の上面で滑落して、その幅方向中心
に対して偏心し、滑落した用紙どうしでの幅方向端縁の
位置が不揃いとなるという問題がある。この問題を解消
するため、従来のこの種の孔版印刷装置の排紙装置とし
て、排出されてアーチ状となった用紙の癖を矯正するた
めに排出経路中に用紙をＵ字形（逆アーチ状）に変形さ
せるように構成されたものがある。それは、（１）実開
平5-10367号公報、（２）特開平7-137920号公報、
（３）実開平5-26944号公報に開示されたものである。2. Description of the Related Art A printing paper discharged from a stencil printing machine has an arch shape (a convex shape upward) and a printing paper placed on a paper ejection tray of a paper ejection device is loaded first. There is a problem in that the printing paper (hereinafter referred to as paper) slips off on the upper surface and is eccentric with respect to the center in the width direction, and the positions of the edges in the width direction of the slipped paper become uneven. In order to solve this problem, as a paper discharge device of a conventional stencil printer of this type, the paper is U-shaped (reverse arched) in the discharge path in order to correct the peculiarities of the discharged paper that is arched. Some are configured to transform into. (1) Japanese Utility Model Laid-Open No. 5-10367, (2) Japanese Patent Laid-Open No. 7137920,
(3) It is disclosed in Japanese Utility Model Laid-Open No. 5-26944.
【０００３】（１）のものは、図５，６に示すようなも
のであって、排紙装置２ａの左右のサイドフェンス４
ａ，４ａ′には案内板41，41′が互いに対向して設けら
れており、案内板41，41′の案内部42，42′は排紙台３
上に突出する姿勢と、案内部42，42′が排紙台３上から
退く姿勢に動作できるものである。なお図５において、
１は孔版印刷装置、15は版胴、16はプレスローラ、17は
用紙排出搬送手段、18は分離爪をそれぞれ表す。このよ
うなものにあって、孔版印刷装置１の用紙排出口20から
排出された用紙７は、サイドフェンス４ａ，４ａ′の間
で案内部42，42′に両端部が支持され、ついで案内部4
2，42′が、図示しない案内部材回動手段によって用紙
７の排出タイミングに合わせて排紙台３上から退く方向
に回動され、案内部42，42′が排紙台３上から退くと、
用紙７はＵ字形となって自然落下して排紙台３上に載置
される。The type (1) is as shown in FIGS. 5 and 6, and the side fences 4 on the left and right sides of the sheet discharging device 2a.
Guide plates 41 and 41 'are provided on the a and 4a' so as to face each other, and the guide portions 42 and 42 'of the guide plates 41 and 41' are disposed on the paper ejection tray 3
It is possible to operate in such a posture as to project upward and in a posture in which the guide portions 42, 42 'recede from the top of the discharge tray 3. In addition, in FIG.
Reference numeral 1 is a stencil printer, 15 is a plate cylinder, 16 is a press roller, 17 is a sheet discharging and conveying means, and 18 is a separating claw. In such a structure, the paper 7 discharged from the paper discharge port 20 of the stencil printing machine 1 is supported at both ends by the guide portions 42, 42 'between the side fences 4a, 4a', and then the guide portion. Four
When the guide members 42, 42 ′ are retracted from the delivery tray 3 by the guide members pivoting means (not shown), the guide rollers 42, 42 ′ are pivoted in the direction of retracting from the delivery tray 3. ,
The paper sheet 7 is U-shaped and naturally falls and placed on the paper ejection tray 3.
【０００４】（２）のものは、図７に示すようであっ
て、排紙装置２ｂの排紙台３上には一対のサイドフェン
ス４ｂ，４ｂ′が設けられており、サイドフェンス４
ｂ，４ｂ′には窓43が設けられていて、この窓43の外側
には風車状の誘導部材30が回転自在に設けられている。
誘導部材30の円柱状の本体31は水平で用紙７の排出方向
に平行な回転軸32に支持され、本体31の外周面に設けら
れた４枚の板状の誘導部３３のみが窓４３からサイドフ
ェンス４ｂ，４ｂ′の内側に突出しているものである。
このようなものにあって、孔版印刷装置から排出された
用紙７は、アーチ状にカールしており、用紙７の側端縁
は誘導部33に支持されて、誘導部33が回転する間に自重
でＵ字形に矯正されて排紙台３上に載置される。The type (2) is as shown in FIG. 7, in which a pair of side fences 4b and 4b 'are provided on the discharge tray 3 of the discharge device 2b.
A window 43 is provided in b and 4b ', and a windmill-shaped guide member 30 is rotatably provided outside the window 43.
The columnar main body 31 of the guide member 30 is supported by a rotary shaft 32 which is horizontal and parallel to the discharge direction of the sheet 7, and only four plate-like guide portions 33 provided on the outer peripheral surface of the main body 31 from the window 43. It projects inside the side fences 4b and 4b '.
In such a case, the sheet 7 discharged from the stencil printing apparatus is curled in an arch shape, and the side edge of the sheet 7 is supported by the guide portion 33, and while the guide portion 33 rotates. The paper is corrected to have a U-shape by its own weight and placed on the paper output tray 3.
【０００５】（３）ものは、図８に示すようであって、
排紙装置２ｃの排紙台３上には一対のサイドフェンス４
ｃ，４ｃ′が設けられており、サイドフェンス４ｃ，４
ｃ′の内側面には、下側よりも上側が内方に突出した段
差面44，44′となっている。また、サイドフェンス４
ｃ，４ｃ′の用紙が導入される側は排紙方向について上
り勾配となった用紙滑走面45，45′となっており、段差
面44，44′と連続しているものである。なお図８におい
て10′は開口、38はサイドフェンス４ｃ，４ｃ′を排出
方向と直交方向に用紙のサイズに対応して変位させる手
段、39はエンドフェンス５を用紙のサイズに対応して前
後に変位させる手段をそれぞれ表す。このようなものに
あって、孔版印刷装置から排出された用紙は、用紙滑走
面45，45′によってＵ字形に矯正され、段差面44，44′
によって同形状に保持されながら滑走してエンドフェン
ス５に到達する。その後用紙は自重で落下し、段差面4
4，44′を外れたところでＵ字形の矯正が開放されて排
紙台３上に積載される。The item (3) is as shown in FIG.
A pair of side fences 4 is provided on the delivery tray 3 of the delivery device 2c.
c, 4c 'are provided, and the side fences 4c, 4c
On the inner side surface of c ', there are stepped surfaces 44, 44' that project upward inward from the lower side. Also, the side fence 4
The paper introduction side of c, 4c 'is a paper sliding surface 45, 45' having an upward slope in the paper discharge direction, and is continuous with the step surfaces 44, 44 '. In FIG. 8, 10 'is an opening, 38 is a means for displacing the side fences 4c, 4c' in the direction orthogonal to the discharge direction in accordance with the size of the paper, 39 is the end fence 5 in the front-back direction corresponding to the size of the paper. The means for displacing each are shown. In such a case, the paper discharged from the stencil printing machine is corrected into a U-shape by the paper sliding surfaces 45 and 45 ', and the step surfaces 44 and 44'.
While sliding in the same shape, it glides and reaches the end fence 5. After that, the paper falls under its own weight, and the step surface 4
The U-shaped straightening is opened when it departs from 4, 44 ', and the paper is stacked on the discharge tray 3.
【０００６】[0006]
【発明が解決しようとする課題】前記のような従来の排
紙装置は、（１）のようなものは、用紙の排出タイミン
グに合わせて案内部材を駆動させるので、その機構と、
駆動制御が複雑となり、コストがかかり、耐久性と、動
作の信頼性が低く、（２）のようなものは、誘導部の突
出状態が回転の途中で異なり、排出される用紙に十分な
Ｕ字形の矯正を与えるだけの突出量とならない状態の場
合もあり、また回転部分の回転トルクの設定も難しく、
（３）のようなものは、Ｕ字形の矯正を与えた後のサイ
ドフェンス案内面は用紙の排出方向及び下方に一様であ
り、用紙落下方向を整えるガイドの機能は有しておら
ず、用紙が落下するときの姿勢も用紙の先端側から落下
するのか後端側から落下するのか定まらずにエンドフェ
ンスに衝突する時の高さ方向にばらつきを生じ、また段
差面を外れたところでＵ字形の矯正が開放されて排紙台
上に落下するので、用紙の良好な紙揃えが出来ないとい
う問題がある。In the conventional sheet discharging device as described above, the one as in (1) drives the guide member in accordance with the sheet discharging timing.
Drive control becomes complicated, costly, durability and operation reliability are low, and in the case of (2), the protruding state of the guide portion is different during the rotation, so that the amount of U In some cases, the amount of protrusion is not enough to correct the letter shape, and it is difficult to set the rotation torque of the rotating part.
In the case of (3), the side fence guide surface after applying the U-shaped correction is uniform in the paper discharge direction and in the lower direction, and does not have a guide function for adjusting the paper falling direction. The attitude of the paper when it falls is uncertain whether it falls from the front end side or the rear end side of the paper, and there is variation in the height direction when it collides with the end fence. Since the straightening of the sheet is released and the sheet is dropped onto the sheet discharge tray, there is a problem that the sheets cannot be properly aligned.
【０００７】そこでこの発明の目的は、前記のような従
来の排紙装置のもつ問題を解消し、簡単な構造で安価で
あり、排出された用紙にＵ字形の矯正を与えて落下さ
せ、排紙台上に積載された用紙の紙揃えを良好に行うこ
とができる孔版印刷装置の排紙装置を提供するにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional paper discharge device, to have a simple structure and at a low cost, to give a U-shaped correction to the discharged paper, and to drop it. It is an object of the present invention to provide a paper ejection device of a stencil printing device that can favorably align papers stacked on a paper tray.
【０００８】[0008]
【課題を解決するための手段】請求項１に記載の発明
は、前記のような画像形成装置の排紙装置において、排
紙台上に、用紙排出方向において対向して平行に設けら
れ、排出方向と直交方向に変位可能なサイドフェンス
と、排出された用紙の前縁を衝止するエンドフェンスと
を設け、前記サイドフェンスの内側面上部に、内側への
突出量が排紙方向に進むにしたがって小さくなる用紙案
内部材を設けたことを特徴とするものである。請求項２
に記載の発明は、請求項１に記載の発明において、用紙
案内部材の用紙を案内する上面が用紙排出方向と直交す
る方向において内側に下り勾配を有していることを特徴
とするものである。請求項３に記載の発明は、請求項１
に記載の発明において、用紙案内部材の内側面が、用紙
排出方向と直交する方向において、上から下へ外側に向
かって傾斜していることを特徴とするものである。請求
項４に記載の発明は、請求項１に記載の発明において、
用紙案内部材の用紙搬送方向前端部の上面が、用紙搬送
方向と直交する方向にあって用紙案内部材の突出量の最
大点とサイドフェンスの内側面とを結ぶ稜線を一辺とし
て孔版印刷装置本体の用紙排出口方向に向かって下り勾
配となり、用紙排出方向と直交する方向で内側に下り勾
配となる用紙導入部を有することを特徴とするものであ
る。請求項５に記載の発明は、請求項１に記載の発明に
おいて、サイドフェンスが複数の空気抜き開口を有し、
それらの開口の開口面積が排紙方向に順次大きくなるこ
とを特徴とするものである。According to a first aspect of the present invention, there is provided a discharge device for an image forming apparatus as described above, wherein the discharge device is provided on a discharge table in parallel and facing each other in the sheet discharge direction. A side fence that is displaceable in the direction orthogonal to the direction and an end fence that stops the leading edge of the discharged paper are provided, and the amount of inward protrusion in the upper part of the inner side surface of the side fence advances in the paper discharge direction. Therefore, it is characterized in that a small paper guide member is provided. Claim 2
In the invention described in claim 1, the upper surface of the paper guide member for guiding the paper has a downward slope inward in the direction orthogonal to the paper discharge direction. . The third aspect of the present invention is the first aspect.
In the invention described in (3), the inner side surface of the paper guide member is inclined from the upper side to the lower side in the direction orthogonal to the paper discharge direction. The invention according to claim 4 is the same as the invention according to claim 1,
The upper surface of the front end portion of the paper guide member in the paper conveyance direction is in a direction orthogonal to the paper conveyance direction, and the ridge line connecting the maximum point of the projection amount of the paper guide member and the inner side surface of the side fence is taken as one side of the stencil printing machine main body. It is characterized in that it has a paper introduction portion that has a downward slope toward the paper discharge port direction and a downward slope toward the inside in the direction orthogonal to the paper discharge direction. The invention according to claim 5 is the invention according to claim 1, wherein the side fence has a plurality of air vent openings,
It is characterized in that the opening area of these openings gradually increases in the paper discharge direction.
【０００９】[0009]
【発明の実施の形態】図１〜４に示すこの発明の実施形
態において、前記従来と同様の部分については同一の符
号を引用して説明を省略し、主として異なる部分につい
て説明する。図１に示すこの発明の第１実施形態は、図
示しない孔版印刷装置の用紙排出口側に連結され、排出
された用紙を積載する排紙装置２の排紙台３上に、用紙
排出方向において対向して平行に設けられ、排出方向と
直交方向に用紙のサイズに対応して変位可能なサイドフ
ェンス４，４′と、排出された用紙の前縁を衝止するエ
ンドフェンス５とを設け、サイドフェンス４，４′の内
側面上部に、内側への突出量が矢印Ａで示す排紙方向に
進むにしたがって小さくなる用紙案内部材６，６′を設
けたものである。また、サイドフェンス４，４′は、図
示しないが、排出された用紙を確実に用紙案内部材６，
６′の用紙導入側である上面（用紙滑走面）６ａ，６
ａ′に載置させて搬送させるように、用紙排出方向後端
部において、外側に向くように形成してもよく、また、
用紙を案内する上面６ａ，６ａ′は、用紙排出方向にあ
って、排紙台３の面と平行にしているが、用紙排出方向
に対してやや下り勾配を有するように傾斜させてもよ
い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention shown in FIGS. 1 to 4, the same parts as those in the prior art are referred to by the same reference numerals, and the description thereof will be omitted. The first embodiment of the present invention shown in FIG. 1 is connected to the sheet discharge port side of a stencil printing machine (not shown) and is placed on a sheet discharge tray 3 of a sheet discharge device 2 for stacking discharged sheets in the sheet discharge direction. Side fences 4 and 4 ', which are provided in parallel to each other and can be displaced in a direction orthogonal to the discharge direction in accordance with the size of the sheet, and an end fence 5 for stopping the leading edge of the discharged sheet, are provided. Paper guide members 6 and 6 ′ are provided on the inner side upper portions of the side fences 4 and 4 ′ so that the inward projection amount decreases in the paper discharge direction indicated by the arrow A. Although not shown, the side fences 4 and 4'reliably guide the discharged paper to the paper guide members 6 and 6.
Upper surface (paper sliding surface) 6a, 6 which is the paper introduction side of 6 '
It may be formed so as to face outward at the rear end portion in the paper discharge direction so as to be placed on a'and conveyed.
Although the upper surfaces 6a and 6a 'for guiding the paper are in the paper discharge direction and parallel to the surface of the paper discharge tray 3, they may be inclined so as to have a slight downward slope with respect to the paper discharge direction.
【００１０】このようなものにあって、印刷が終了して
図示しない孔版印刷装置の排出口から排出された用紙
は、用紙案内部材６，６′の上面６ａ，６ａ′を滑走し
て搬送され、その先端部がエンドフェンス５に衝突する
と同時に、用紙の先端ほど用紙案内部材６，６′の上面
６ａ，６ａ′の突出量が少ないので用紙を支える抵抗力
が少なくて上面６ａ，６ａ′を中央方向にスライドしな
がら、用紙の先端から除々に落下し始め、その後、後端
が落下して排紙台３の上に積載される。このとき、用紙
には先端から後端に順次Ｕ字形状に矯正が与えられるの
で、空気抵抗も少なくてスムースに落下する。また、用
紙の先端がエンドフェンス５に衝突したとき、用紙の高
さ位置は用紙案内部材６，６′によって規制されてお
り、落下のばらつきをおさえることができるうえ、先端
が後端より早く落下するので、用紙はエンドフェンス５
側へ寄ろうとする力が働き搬送方向の積載のばらつきも
なく、さらに着地の際も、先端から除々に後端へと着地
が行われるので用紙間に溜った空気もスムースに排除す
ることができて、先端から軟着地することからエンドフ
ェンス５に対する用紙の衝撃がすくなくて紙ずれが少な
くてすみ、良好に紙揃えがなされて載置される。In such a case, the sheet discharged from the discharge port of the stencil printing device (not shown) after printing is completed, slides on the upper surfaces 6a and 6a 'of the sheet guide members 6 and 6'and is conveyed. At the same time that the leading edge of the sheet collides with the end fence 5, the amount of protrusion of the upper surfaces 6a, 6a 'of the sheet guiding members 6, 6'becomes smaller toward the leading edge of the sheet. While sliding in the central direction, the paper gradually begins to drop from the front end, and then the rear end drops and is stacked on the paper ejection tray 3. At this time, since the U-shaped correction is sequentially applied to the paper from the front end to the rear end, the air resistance is small and the paper falls smoothly. Further, when the front end of the paper collides with the end fence 5, the height position of the paper is regulated by the paper guide members 6 and 6 ', so that the variation in the fall can be suppressed and the front end falls earlier than the rear end. So the paper is end fence 5
There is no variation in the stacking in the transport direction due to the force that tends to move toward the side, and even when landing, the air gradually accumulates from the leading edge to the trailing edge, so the air accumulated between the sheets can be smoothly removed. Since the soft landing is performed from the tip, the paper impact on the end fence 5 is small and the paper misalignment is small, so that the paper can be placed in good alignment.
【００１１】図２に示す第２実施形態は、用紙案内部材
の用紙を案内する上面６ａ，６ａ′に用紙排出方向と直
交する方向において内側に下り勾配を付けた点で第１実
施形態と相違するものである。さらに、この用紙案内部
材６，６′の内側面６ｂ，６ｂ′が用紙排出方向と直交
する方向において上から下へ外方向にアーチ形状の傾斜
を付けたものである。このようなものにあって、用紙の
落下に対する抵抗のばらつきを少なくすることができ
て、紙の厚さや、サイズが異なっても、Ｕ字形状に矯正
を与えてスムースに落下させる。また、この傾斜面に凹
凸、またはゴムなどの摩擦抵抗の大きい部材８を設けた
ものである。この内側面６ｂ，６ｂ′の傾斜を第１実施
形態に用いてもよい。The second embodiment shown in FIG. 2 is different from the first embodiment in that the upper surfaces 6a, 6a 'of the paper guide member for guiding the paper have a downward slope inward in the direction orthogonal to the paper discharge direction. To do. Further, the inner side surfaces 6b, 6b 'of the paper guide members 6, 6'are provided with an arch-shaped inclination from the upper side to the lower side in the direction orthogonal to the paper discharge direction. In such a case, it is possible to reduce the variation in resistance to the drop of the paper, and even if the paper has a different thickness or size, the U-shape is corrected and dropped smoothly. Further, a member 8 having a large frictional resistance such as unevenness or rubber is provided on the inclined surface. The inclination of the inner side surfaces 6b and 6b 'may be used in the first embodiment.
【００１２】このようなものにあって、用紙案内部材
６，６′の内側面６ｂ，６ｂ′に形成されたアーチ形状
の傾斜によって、用紙７の両側縁をガイドして開放させ
ずに落下させ、両側縁に落下に対する抵抗を与えて用紙
７の排出方向の中央部の落下速度を両側縁より速めて、
落下時に与えたＵ字形の矯正を維持させて、落下を開始
した用紙が、通常逆Ｕ字形のアーチ形の形状に戻るのを
防止し、落下中にアーチ形に戻ることによって生じる排
紙台３上の紙揃えが不良となることを防止している。そ
して傾斜面に凹凸、またはゴムなどの摩擦抵抗の大きい
部材８を設けたので、用紙７の両側縁に対する落下の抵
抗が増大して前記の動作が効果的に行われ、良好に紙揃
えが行われて排紙台３の上に載置される。In such a case, due to the arch-shaped inclination formed on the inner side surfaces 6b, 6b 'of the sheet guide members 6, 6', both side edges of the sheet 7 are guided and dropped without being opened. By giving resistance to the fall to both side edges, the drop speed of the central portion of the sheet 7 in the discharge direction is made faster than the both side edges,
The U-shaped correction provided at the time of dropping is maintained to prevent the paper that has started to drop from returning to the shape of an inverted U-shaped arch, and the paper ejection tray 3 generated by returning to the arch during the drop. It prevents the top paper alignment from becoming defective. Since the member 8 having a large frictional resistance, such as unevenness or rubber, is provided on the inclined surface, the resistance of the paper 7 to the both side edges of the paper 7 increases, the above operation is effectively performed, and the papers are aligned well. Then, it is placed on the sheet ejection tray 3.
【００１３】図３に示す第３実施形態は、第１実施形態
において、用紙案内部材６，６′の上面６ａ，６ａ′を
延長して、用紙搬送方向と直交する方向にあって用紙案
内部材６，６′の突出量の最大点Ｂと、サイドフェンス
４，４′の内側面と用紙案内部材６，６′の突出量の最
大点Ｂにおける上面６ａ，６ａ′の交点Ｃとを結ぶ稜線
Ｄを一辺として孔版印刷装置本体の用紙排出口方向に向
かって下り勾配となり、用紙排出方向と直交する方向で
内側に下り勾配となるようにして用紙導入部９を形成し
たものである。この用紙導入部９においてサイドフェン
ス４，４′を外側に偏向させている。この実施形態を第
２実施形態に用いてもよい。The third embodiment shown in FIG. 3 differs from the first embodiment in that the upper surfaces 6a and 6a 'of the paper guide members 6 and 6'are extended so that the paper guide member is in a direction orthogonal to the paper conveying direction. A ridge line that connects the maximum point B of the protrusion amount of 6 and 6'and the intersection point C of the upper surfaces 6a and 6a 'at the maximum point B of the protrusion amount of the sheet guide members 6 and 6'to the inner surfaces of the side fences 4 and 4'. The sheet introducing portion 9 is formed so that the side D is a downward slope toward the sheet discharge port of the stencil printing apparatus main body, and the inside is a downward slope in a direction orthogonal to the sheet discharge direction. The side fences 4 and 4'are deflected outward in the paper introducing section 9. This embodiment may be used in the second embodiment.
【００１４】このようなものにあって、排出口から排出
された用紙の先端の高さのばらつきや、紙幅方向ずれの
ばらつきが発生しても、用紙案内部材６，６′の上面６
ａ，６ａ′に用紙を用紙導入部９によって確実に導入し
て搬送することができ、また用紙導入部９を設けないで
用紙案内部材６，６′の高さを排出口の高さより低くし
て、用紙を上面６ａ，６ａ′に導入して排紙台３の上に
落下させるものに比べて、用紙案内部材６，６′を排出
口の高さにまですることができて、用紙の積載量を多く
することができる。In such a case, even if the height of the leading edge of the sheet discharged from the discharge port or the deviation in the sheet width direction is varied, the upper surfaces 6 of the sheet guide members 6 and 6'can be used.
The paper can be reliably introduced into the a, 6a 'by the paper introducing section 9 and conveyed, and the height of the paper guiding members 6, 6'can be made lower than the height of the discharge port without providing the paper introducing section 9. The paper guide members 6, 6'can be set to the height of the discharge port as compared with the case where the paper is introduced onto the upper surfaces 6a, 6a 'and dropped on the paper discharge tray 3. The loading capacity can be increased.
【００１５】図４に示す第４実施形態は、第３実施形態
において、サイドフェンス４，４′が複数の空気抜き開
口101…10nを有し、それらの開口101…10nの開口面積が
排紙方向に進むにしたがって大きくなるように形成した
ものである。この開口101…10nの形状はサイドフェンス
４，４′の単位面積当りに設けられる開口面積が排紙方
向に進むにしたがって大きくなるようにすればよいの
で、図に示すような逆三角形に限らず、四角形であって
もよい。また、この実施形態の開口101…10nを第１，２
実施形態に用いてもよい。In the fourth embodiment shown in FIG. 4, in the third embodiment, the side fences 4 and 4'have a plurality of air vent openings 10 1 ... 10 n , and the opening areas of these openings 10 1 ... 10 n . Is formed so as to increase in the sheet discharge direction. The shape of the openings 10 1 ... 10 n may be set so that the opening area provided per unit area of the side fences 4 and 4 ′ becomes larger as it goes in the paper discharge direction. The shape is not limited and may be a quadrangle. Further, the opening 10 1 ... 10 n of the embodiment the first and second
You may use for embodiment.
【００１６】このようなものにあって、用紙の排出方向
先端側に行くにしたがって開口面積が大きいので、空気
抵抗が減少していって用紙の先端側の落下が早まり、排
出方向後端側においては開口面積を小さくしてあり、ま
たは空けずにおいて、空気抵抗を高めてゆっくりと落下
させるので、用紙が落下する姿勢を前下がりで維持して
エンドフェンス５に衝突させ、その際、エンドフェンス
５に衝突する衝撃は、このような構成を有しないものに
比べて弱くなっており、かつ、用紙がその先端から後端
へと排紙台３上に落下して、着地後の紙間の空気の排出
が速やかに行われ、紙間の残留空気による用紙の動きを
防止して、良好に紙揃して排紙台３の上に載置される。
また、前記のようにゆっくりと落下させるので、印刷面
を乾燥させる時間も確保することができる。In such a case, since the opening area is larger toward the leading end side of the sheet in the sheet discharging direction, the air resistance is reduced and the leading edge of the sheet drops faster, so that the trailing edge side in the sheet discharging direction is reduced. Has a small opening area or increases the air resistance to slowly drop without vacant space, so that the attitude of dropping the paper is kept frontward downward to collide with the end fence 5, and at that time, the end fence 5 The impact of colliding with the paper is weaker than that without such a structure, and the paper drops from the leading edge to the trailing edge onto the paper output tray 3, and the air between the paper sheets after landing is reduced. The sheets are quickly ejected, the sheets are prevented from moving due to the residual air between the sheets, and the sheets are properly aligned and placed on the sheet ejection tray 3.
In addition, since it is slowly dropped as described above, it is possible to secure a time for drying the printing surface.
【００１７】[0017]
【発明の効果】この発明は、前記のようであって、請求
項１に記載の発明は、前記のような画像形成装置の排紙
装置において、排紙台上に、用紙排出方向において対向
して平行に設けられ、排出方向と直交方向に変位可能な
サイドフェンスと、排出された用紙の前縁を衝止するエ
ンドフェンスとを設け、前記サイドフェンスの内側面上
部に、内側への突出量が排紙方向に進むにしたがって小
さくなる用紙案内部材を設けたので、簡単な構造で安価
であり、用紙が先端側からエンドフェンスに寄る作用力
によって搬送方向に良好に紙揃えして積載することがで
きるとともに、紙サイズや厚さに影響されずに用紙のＵ
字形の矯正が先端から除々に移動しながら行われて、落
下に対する空気抵抗がすくなくて、落下がスムースであ
るという効果がある。請求項２に記載の発明は、用紙案
内部材の用紙を案内する上面が用紙排出方向と直交する
方向において内側に下り勾配を有しているので、落下に
対する抵抗が少なくて、紙サイズや厚さに影響されずに
落下と、用紙のＵ字形の矯正とがスムースに行われると
いう効果がある。請求項３に記載の発明は、用紙案内部
材の内側面が、用紙排出方向と直交する方向において、
上から下へ外側に向かって傾斜しているので、落下中の
用紙のＵ字形の矯正の姿勢を維持することができるとい
う効果がある。請求項４に記載の発明は、用紙案内部材
の用紙搬送方向前端部の上面が、用紙搬送方向と直交す
る方向にあって用紙案内部材の突出量の最大点とサイド
フェンスの内側面とを結ぶ稜線を一辺として孔版印刷装
置本体の用紙排出口方向に向かって下り勾配となり、用
紙排出方向と直交する方向で内側に下り勾配となる用紙
導入部を有するので、用紙先端部の片側または両側の下
カールや、幅方向にずれがあっても、確実に排出された
用紙を案内部材の上面に導入して搬送することができる
という効果がある。請求項５に記載の発明は、サイドフ
ェンスが複数の空気抜き開口を有し、それらの開口の開
口面積が排紙方向に順次大きくなるので、用紙の着地を
先端から除々に後端へと移動することができ、着地後の
紙間の空気を除去できて用紙の動きがなくて良好に紙揃
えして積載することができるという効果がある。The present invention is as described above, and the invention according to claim 1 is such that in the paper discharge device of the image forming apparatus as described above, it faces the paper discharge table in the paper discharge direction. Side fences provided in parallel with each other and displaceable in a direction orthogonal to the discharge direction, and an end fence for stopping the leading edge of the discharged sheet are provided. Since a paper guide member that becomes smaller as it advances in the paper discharge direction is provided, the structure is simple and inexpensive, and the paper is favorably aligned and stacked in the conveying direction by the action force of the paper from the leading edge side toward the end fence. And the U of the paper is not affected by the paper size and thickness.
The correction of the letter shape is performed while gradually moving from the tip, and there is an effect that the air resistance against the drop is small and the drop is smooth. According to the second aspect of the present invention, the upper surface of the paper guide member that guides the paper has a downward slope inward in the direction orthogonal to the paper discharge direction. There is an effect that the falling and the correction of the U-shape of the sheet are smoothly performed without being affected by the above. According to a third aspect of the present invention, the inner side surface of the sheet guide member is in a direction orthogonal to the sheet discharge direction,
Since it is inclined from the top to the bottom toward the outside, there is an effect that it is possible to maintain the posture of correcting the U-shape of the falling paper. In the invention according to claim 4, the upper surface of the front end portion of the paper guide member in the paper conveyance direction is in a direction orthogonal to the paper conveyance direction, and connects the maximum point of the protrusion amount of the paper guide member and the inner side surface of the side fence. Since the ridge has one side as a downward slope toward the paper discharge port of the stencil printing machine body, and has a paper introduction part that has a downward slope toward the inside in the direction orthogonal to the paper discharge direction, one side or both sides of the leading edge of the paper Even if there is a curl or a deviation in the width direction, there is an effect that the discharged sheet can be surely introduced onto the upper surface of the guide member and conveyed. In the invention according to claim 5, the side fence has a plurality of air vent openings, and the opening areas of these openings gradually increase in the paper discharge direction, so that the landing of the paper is gradually moved from the front end to the rear end. Therefore, it is possible to remove the air between the sheets of paper after landing, and to move the sheets of paper without any movement so that the sheets can be properly aligned and stacked.
【図１】この発明の第１実施形態の要部斜視図である。FIG. 1 is a perspective view of an essential part of a first embodiment of the present invention.
【図２】同上の第２実施形態の正断面図である。FIG. 2 is a front sectional view of a second embodiment of the above.
【図３】同上の第３実施形態の要部斜視図である。FIG. 3 is a perspective view of an essential part of a third embodiment of the above.
【図４】同上の第４実施形態の要部斜視図である。FIG. 4 is a perspective view of an essential part of a fourth embodiment of the above.
【図５】従来の画像形成装置の排紙装置の概略縦断面図
である。FIG. 5 is a schematic vertical sectional view of a paper discharge device of a conventional image forming apparatus.
【図６】同上の排紙装置の概略正面図である。FIG. 6 is a schematic front view of the same paper discharge device.
【図７】同上の他の排紙装置のサイドフェンスの要部斜
視図である。FIG. 7 is a perspective view of a main part of a side fence of another sheet discharging device of the above.
【図８】同上のさらに他の排紙装置のサイドフェンスの
斜視図である。FIG. 8 is a perspective view of a side fence of still another paper discharge device of the above.
２ 排紙装置 ３ 排紙台 ４，４′ サイドフェンス ５ エンドフェンス ６，６′ 用紙案内部材 ６ｂ，６ｂ′ 内側面 ７ 用紙 ９ 用紙導入部 101…10n 開口 Ｄ 稜線2 Paper discharging device 3 Paper discharging table 4, 4'side fence 5 End fence 6, 6'Paper guiding member 6b, 6b 'Inner side 7 Paper 9 Paper introducing section 10 1 ... 10 n Open D Ridge
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高橋 正紀 宮城県柴田郡柴田町中名生神明堂３番地の １ 東北リコー株式会社内 (72)発明者 八島 央宗 宮城県柴田郡柴田町中名生神明堂３番地の １ 東北リコー株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masanori Takahashi, 3rd Nakameibu Shinmeidou, Shibata-cho, Shibata-gun, Miyagi Prefecture 1 Tohoku Ricoh Co., Ltd. No. 1 inside Tohoku Ricoh Co., Ltd.
Claims (5)
排紙台を有する画像形成装置の排紙装置において、排紙
台上に、用紙排出方向において対向して平行に設けら
れ、排出方向と直交方向に変位可能なサイドフェンス
と、排出された用紙の前縁を衝止するエンドフェンスと
を設け、前記サイドフェンスの内側面上部に、内側への
突出量が排紙方向に進むにしたがって小さくなる用紙案
内部材を設けたことを特徴とする排紙装置。1. A sheet discharging device of an image forming apparatus having a sheet discharging tray for stacking sheets to be discharged after image formation, the sheet discharging device being provided on the sheet discharging table in parallel and facing each other in the sheet discharging direction. A side fence that can be displaced in the orthogonal direction and an end fence that stops the leading edge of the ejected paper are provided, and the amount of inward projection decreases at the upper part of the inner side surface of the side fence as it advances in the paper ejection direction. A paper discharge device comprising a paper guide member.
紙排出方向と直交する方向において内側に下り勾配を有
していることを特徴とする請求項１に記載の排紙装置。2. The paper discharge device according to claim 1, wherein an upper surface of the paper guide member for guiding the paper has a downward slope inward in a direction orthogonal to the paper discharge direction.
と直交する方向において、上から下へ外側に向かって傾
斜していることを特徴とする請求項１に記載の排紙装
置。3. The paper ejection device according to claim 1, wherein an inner side surface of the paper guide member is inclined outward from the top to the bottom in a direction orthogonal to the paper ejection direction.
紙搬送方向と直交する方向にあって用紙案内部材の突出
量の最大点とサイドフェンスの内側面とを結ぶ稜線を一
辺として孔版印刷装置本体の用紙排出口方向に向かって
下り勾配となり、用紙排出方向と直交する方向で内側に
下り勾配となる用紙導入部を有することを特徴とする請
求項１に記載の排紙装置。4. The stencil printing with the ridgeline connecting the maximum point of the protrusion amount of the paper guide member and the inner side surface of the side fence as one side, in which the upper surface of the paper guide member on the paper introduction side is in the direction orthogonal to the paper conveyance direction. 2. The paper discharge device according to claim 1, further comprising a paper introducing section that has a downward slope toward a paper discharge port of the apparatus body and has a downward slope toward the inside in a direction orthogonal to the paper discharge direction.
有し、それらの開口の開口面積が排紙方向に順次大きく
なることを特徴とする請求項１に記載の排紙装置。5. The paper ejection device according to claim 1, wherein the side fence has a plurality of air vent openings, and the opening areas of the openings are sequentially increased in the paper ejection direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23826195A JP3686135B2 (en) | 1995-09-18 | 1995-09-18 | Paper discharge device of image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23826195A JP3686135B2 (en) | 1995-09-18 | 1995-09-18 | Paper discharge device of image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0977337A true JPH0977337A (en) | 1997-03-25 |
| JP3686135B2 JP3686135B2 (en) | 2005-08-24 |
Family
ID=17027558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23826195A Expired - Fee Related JP3686135B2 (en) | 1995-09-18 | 1995-09-18 | Paper discharge device of image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3686135B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1160009A (en) * | 1997-08-06 | 1999-03-02 | Dainippon Printing Co Ltd | Stacker device |
| JP2015042460A (en) * | 2013-08-26 | 2015-03-05 | 株式会社リコー | Stencil printing machine |
-
1995
- 1995-09-18 JP JP23826195A patent/JP3686135B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1160009A (en) * | 1997-08-06 | 1999-03-02 | Dainippon Printing Co Ltd | Stacker device |
| JP2015042460A (en) * | 2013-08-26 | 2015-03-05 | 株式会社リコー | Stencil printing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3686135B2 (en) | 2005-08-24 |
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