JPH0522519Y2 - - Google Patents
Info
- Publication number
- JPH0522519Y2 JPH0522519Y2 JP873983U JP873983U JPH0522519Y2 JP H0522519 Y2 JPH0522519 Y2 JP H0522519Y2 JP 873983 U JP873983 U JP 873983U JP 873983 U JP873983 U JP 873983U JP H0522519 Y2 JPH0522519 Y2 JP H0522519Y2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- light
- detection
- feeder board
- pattern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 38
- 238000010586 diagram Methods 0.000 description 5
- 239000013256 coordination polymer Substances 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 101000878595 Arabidopsis thaliana Squalene synthase 1 Proteins 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Controlling Sheets Or Webs (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
【考案の詳細な説明】
〔考案の技術分野〕
本考案は、枚葉印刷機において、枚葉紙が重複
して供給されたことを検出するのに用いられる枚
葉紙の重複検出装置に関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a sheet duplication detection device used in a sheet-fed printing press to detect that sheets have been fed in duplicate. It is.
枚葉印刷機における枚葉紙の供給は、１枚ずつ
が正規に供給されることを要し、重複して供給さ
れると、脱刷を生ずると共に、枚葉紙が折り重な
つて印刷機構へ与えられ、ゴム胴のブランケツト
を損傷することにもなるため、一般に、枚葉紙の
透過光々量に基づき枚葉紙の重複を検出するもの
となつている。
The feeding of sheets in a sheet-fed printing press requires that each sheet be fed properly one by one, and if the sheets are fed repeatedly, this will cause off-printing and the sheets will overlap and cause the printing mechanism to Therefore, the overlap of sheets is generally detected based on the amount of light transmitted through the sheets.
第１図は、従来の枚葉紙供給機構を示す要部破
断側面図であり、傾斜状に設けたフイーダボード
１上に沿つて枚葉紙２が図上右方から左方へ逐次
供給され、下方から突出する前当３へ枚葉紙２の
前縁が押当して停止するものとなつているが、枚
葉紙２の１枚のみがその前縁にわたつて前当３へ
押当したか否かを検出するため、ランプ等を用い
た投光器４がフイーダボード１の下面側に設けて
あると共に、フイーダボード１の前当３近傍へ穿
設した透孔５および枚葉紙２を透過した投光器４
からの光線を、枚葉紙２の上面側において受光
し、枚葉紙２の光線透過度を検出するため、受光
素子を有する受光器６が設けてある。 FIG. 1 is a cutaway side view of a main part of a conventional sheet feeding mechanism, in which sheets 2 are sequentially fed from the right to the left in the figure along a feeder board 1 provided in an inclined manner. The front edge of the sheet 2 is pressed against the front abutment 3 protruding from below and stopped, but only one of the sheets 2 is pressed against the front abutment 3 over its leading edge. In order to detect whether or not the light has been transmitted, a light projector 4 using a lamp or the like is provided on the bottom side of the feeder board 1, and a light transmitter 4 that transmits light through a through hole 5 drilled near the front plate 3 of the feeder board 1 and the sheet 2. Floodlight 4
A light receiver 6 having a light receiving element is provided in order to receive the light beam from the upper surface of the sheet 2 and detect the light transmittance of the sheet 2.
なお、受光器６は、フイーダボード１の上方へ
側方から突出したシヤフト７へ係止される支持具
８により支持されており、支持具８とフイーダボ
ード１との間には、枚葉紙２の通過できる間隙が
形成されている。 The light receiver 6 is supported by a support 8 that is locked to a shaft 7 that projects above the feeder board 1 from the side, and between the support 8 and the feeder board 1 there is a A gap is formed through which it can pass.
第２図は、枚葉紙２に対する検出点の配置状況
を示す斜視図であり、枚葉紙２における余白部９
および絵柄印刷部１０にわたつて検出点１１ａ〜
１１ｄが配されており、余白部９の前縁側に対
し、第１図の構成による検出点１１ａ〜１１ｃを
設け、検出点１１ａ，１１ｂにより、枚葉紙２が
前当３に対し曲つた状態として供給された曲り検
出を行なうと共に、検出点１１ｃにより、枚葉紙
２が重複して供給された重複検出を行なう一方、
別途に設けた第１図と同様の構成により、枚葉紙
２の前縁より内方側の検出点１１ｄにおいて、枚
葉紙２が正規に供給されたとき、印刷機の印刷用
ローラを胴入れ状態とする胴入信号の検出を行な
つている。 FIG. 2 is a perspective view showing the arrangement of detection points on the sheet 2.
and the detection points 11a~ over the pattern printing section 10.
11d is arranged, and detection points 11a to 11c having the configuration shown in FIG. At the same time, the detection point 11c performs overlap detection when the sheet 2 is supplied in duplicate,
With a separately provided configuration similar to that shown in FIG. Detection of a signal to enter the state is being carried out.
しかし、第３図Ａ〜Ｃに斜視図を示すとおり、
互に重複する枚葉紙２ａ，２ｂが、検出点１１ｃ
においては重複せず、ずれた状態として供給さ
れゝば、重複検出を行なうことのできない欠点を
生ずる。 However, as shown in perspective views in FIGS. 3A to 3C,
The mutually overlapping sheets 2a and 2b are detected at the detection point 11c.
If the signals are supplied in a shifted state without overlapping, there will be a drawback that overlapping detection cannot be performed.
この対策としては、検出点１１ｃを枚葉紙２の
更に中央部寄りへ移動させればよいが、二度通し
印刷においては、枚葉紙２へすでに絵柄が印刷さ
れているうえ、枚葉紙２のほゞ中央部における重
複検出では、印刷機の動作上、横針装置により枚
葉紙２の横見当が規正される以前に重複検出を行
なわなばならないため、検出点へ位置する絵柄の
部位が変化し、これの濃淡に応じて受光器の検
出々力が変動するものとなり、重複検出を安定に
行なうことのできない欠点を生ずる。 As a countermeasure against this, the detection point 11c can be moved further toward the center of the sheet 2, but in double-pass printing, the image is already printed on the sheet 2, and the sheet In the case of overlap detection at the center of 2, due to the operation of the printing press, overlap detection must be performed before the horizontal register of sheet 2 is regulated by the horizontal needle device. As the area changes, the detection power of the photoreceiver changes depending on the density of the area, resulting in the disadvantage that overlapping detection cannot be performed stably.
本考案は、従来のかゝる欠点を一挙に排除する
目的を有し、供給された枚葉紙の絵柄印刷部と対
向する位置へ互に離間して複数の投光器を設ける
と共に、この各投光器と枚葉紙およびフイーダボ
ードを介して各個に対向する複数の受光器を設け
たうえ、これら各受光器のうち墨色の網目率の
ほゞ均一な範囲と対向する受光器の出力をスイツ
チにより選択し得るものとし、このスイツチによ
り選択された受光器の出力を検出回路へ与えるも
のとし、重複検出を安定に行なえる絵柄の範囲を
選択して重複検出を行なうものとした極めて効果
的な、枚葉紙の重複検出装置を提供するものであ
る。
The purpose of the present invention is to eliminate such drawbacks of the conventional method at once, by providing a plurality of projectors spaced apart from each other at positions facing the pattern printing portion of the supplied sheet, and by providing a plurality of projectors that are spaced apart from each other. In addition to providing a plurality of light receivers facing each other through sheets and feeder boards, the output of the light receiver facing a substantially uniform range of black mesh ratio among these light receivers can be selected by a switch. The output of the photoreceiver selected by this switch is applied to the detection circuit, and the range of patterns that can stably detect overlaps is selected to perform overlap detection. The present invention provides a duplication detection device.
以下、実施例を示す図によつて本考案の詳細を
説明するが、まず、本考案の原理から説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to figures showing embodiments, but first, the principle of the present invention will be explained.
第４図は、枚葉紙２へ印刷された絵柄の網目率
Ｍと、これの透過光に基づく受光器の出力電圧
VLとの関係図であり、Ｂは墨、Ｒは赤、Ｙは黄、
Ｉは藍の各色に応ずる特性を示し、出力電圧VL
は枚葉紙２が介在しない場合VL0となり、１枚の
枚葉紙２が介在する場合には、絵柄の色および網
目率Ｍに応じて図示のとおりに変化するが、Ｒ，
Ｙ，Ｉにおいては大幅に変化せず、Ｂにおいて大
幅に変化するものとなつている。 Figure 4 shows the mesh ratio M of the pattern printed on the sheet 2 and the output voltage of the light receiver based on the transmitted light.
This is a relationship diagram with V L , where B is black, R is red, Y is yellow,
I indicates the characteristics corresponding to each color of indigo, and the output voltage V L
is V L0 when there is no sheet 2, and when there is one sheet 2, it changes as shown in the figure depending on the color of the pattern and the mesh ratio M, but R,
Y and I do not change significantly, but B changes significantly.
なお、VLWは、印刷前の枚葉紙２が２枚介在す
る場合の出力電圧であり、絵柄がＲ，Ｙ，Ｉのい
ずれかであれば、その網目率Ｍに拘らず、重複検
出の判別レベルを鎖線により示すLDのとおりに
定めればよいものとなる。 Note that V LW is the output voltage when there are two sheets 2 before printing, and if the pattern is R, Y, or I, regardless of the mesh ratio M, overlap detection is possible. It is sufficient to set the discrimination level as shown by the chain line L D.
一方、絵柄がＢであれば、網目率Ｍに応じて出
力電圧VLは大幅に変化するものとなるが、変化
状態が急峻なため、検出点に網目率Ｍのほゞ均一
な総柄の範囲が常に対応するものとすれば、この
範囲の網目率Ｍにしたがつて、重複検出の判別レ
ベルLDを設定すればよい。 On the other hand, if the pattern is B, the output voltage V L will change significantly depending on the mesh ratio M, but since the change state is steep, the detection point will have an almost uniform overall pattern with a mesh ratio M. Assuming that the ranges always correspond, the discrimination level L D for overlapping detection may be set according to the mesh ratio M of this range.
このため、投光器と受光器との対向するものを
複数設けておき、これら投受光器の検出対象部位
の絵柄がＢである場合、これらの受光器から、Ｂ
（墨色）の網目率Ｍのほゞ均一な絵柄の範囲と対
向するものを選定し、選定した受光器の出力を検
出回路へ与えるものとすれば、絵柄の印刷された
枚葉紙２の重複検出を安定に行なうことができ
る。 For this reason, a plurality of emitters and receivers are provided that face each other, and if the pattern of the detection target area of these emitters and receivers is B, from these light receivers,
(black color) that faces the range of a substantially uniform pattern with a mesh ratio M, and if the output of the selected light receiver is given to the detection circuit, the sheets 2 on which the pattern is printed will overlap. Detection can be performed stably.
第５図以降は、以上の原理に基づく本考案の実
施例を示し、第５図は要部破断斜視図であり、フ
イーダボード１の前当３に前縁が押当する状態と
して供給された枚葉紙２の絵柄印刷部１０と対向
するフイーダボード１の下面側に、図上省略した
２台の投光器が互に離間して設けてあると共に、
フイーダボード１および枚葉紙２を介して２台の
投光器と各個に対向する位置へ２台の受光器６
ａ，６ｂが設けてあり、フイーダボード１のこれ
らと対向する部位には、透孔２１ａ，２１ｂが穿
設してある。 From FIG. 5 onwards, an embodiment of the present invention based on the above principle is shown, and FIG. 5 is a cutaway perspective view of the main part, in which the sheet is fed with its leading edge pressed against the front stop 3 of the feeder board 1. Two projectors (not shown in the figure) are provided spaced apart from each other on the lower surface side of the feeder board 1 facing the pattern printing section 10 of the paper sheet 2.
Two light receivers 6 are moved to positions facing each of the two light emitters via the feeder board 1 and sheet paper 2.
a, 6b are provided, and through holes 21a, 21b are bored in portions of the feeder board 1 facing these.
また、受光器６ａ，６ｂを支持するホルダ２２
ａ，２２ｂは、押ねじ２３ａ，２３ｂにより第１
図と同様なシヤフト７へ固定されており、押ねじ
２３ａ，２３ｂを緩めることにより、シヤフト７
に沿う水平方向へ受光器６ａ，６ｂを移動させる
ことが自在になつていると共に、透孔２１ａ，２
１ｂは、受光器６ａ，６ｂの移動方向に沿つた長
孔となつている。 Additionally, a holder 22 supporting the light receivers 6a and 6b is provided.
a, 22b are connected to the first
It is fixed to the shaft 7 similar to the figure, and by loosening the setscrews 23a and 23b, the shaft 7 can be removed.
The light receivers 6a, 6b can be freely moved in the horizontal direction along the through holes 21a, 2.
1b is a long hole along the moving direction of the light receivers 6a, 6b.
第６図は、投光器の斜視図であり、ランプＬを
保持する保持板３１には、第５図の透孔２１ａ，
２１ｂと同方向の長孔３２が穿設されており、断
面図を示す第７図のとおり、フイーダボード１へ
下面側から螺入しかつ長孔３２を貫通するねじ３
３により、フイーダボード１の下面側へ固定され
るものとなつている。 FIG. 6 is a perspective view of the projector, and the holding plate 31 that holds the lamp L has the through holes 21a shown in FIG.
A long hole 32 is bored in the same direction as 21b, and as shown in FIG.
3, it is fixed to the lower surface side of the feeder board 1.
たゞし、ねじ３３を緩めれば、長孔３２の範囲
内において移動自在であり、２台の投光器と受光
器６ａ，６ｂとは、互に対向して水平方向へ移動
自在となつている。 However, by loosening the screw 33, it can be moved freely within the range of the elongated hole 32, and the two projectors and receivers 6a and 6b can be moved horizontally facing each other. .
なお、フイーダボード１の透孔２１には、透明
アクリル板等のカバー３４が嵌入してある。 Note that a cover 34 such as a transparent acrylic plate is fitted into the through hole 21 of the feeder board 1.
第８図は、回路構成を示す図であり、各投光器
のランプL1，L2に対する電源Ｅの供給は、スイ
ツチSS1により選択されると共に、可変抵抗器
VR1により通電々流が調整され、発光々量の設定
が行なわれるものとなつており、受光器６ａ，６
ｂの受光トランジスタQ1，Q2は、スイツチSS1に
より選択され、これらの出力が、トランジスタ
Q3以降の検出回路へ選択のうえ与えられるもの
となつている。 FIG. 8 is a diagram showing the circuit configuration, and the supply of power E to the lamps L 1 and L 2 of each floodlight is selected by switch SS 1, and the supply of power E to lamps L 1 and L 2 of each floodlight is selected by switch SS 1 and
The current flow is adjusted by VR 1 , and the amount of light emitted is set.
The light-receiving transistors Q 1 and Q 2 of b are selected by the switch SS 1 , and their outputs are
It is selectively given to the detection circuits from Q 3 onwards.
受光トランジスタQ1またはQ2の出力は、抵抗
器R1〜R3およびトランジスタQ3の回路を介し、
増幅器Ａにより増幅されたうえ、シユミツト回路
SHTによりレベル判別がなされ、枚葉紙２の重
複と判断されゝば、同回路SHTから出力が生じ、
ドライバおよび表示灯等からなる表示回路DPを
駆動し、重複検出の表示を行なう。 The output of the light-receiving transistor Q 1 or Q 2 passes through a circuit of resistors R 1 to R 3 and transistor Q 3 ,
In addition to being amplified by amplifier A, the Schmitt circuit
Level discrimination is performed by SHT, and if it is determined that sheet 2 is duplicated, an output is generated from the same circuit SHT,
It drives a display circuit DP consisting of a driver, an indicator light, etc., and displays the detection of duplicates.
また、印刷機の回転部と係合したカムおよびス
イツチ等により与えられる検出タイミング信号
TSと、シユミツト回路SHTの出力とが同時に生
ずれば、ANDゲートＧを介し同回路SHTの出力
が重複信号DSとして送出される。 Also, detection timing signals given by cams and switches engaged with the rotating part of the printing press.
If TS and the output of the Schmitt circuit SHT occur simultaneously, the output of the circuit SHT is sent out via the AND gate G as a duplicate signal DS.
したがつて、重複信号DSにより枚葉紙２の重
複供給が報知され、これを用いて印刷機の自動停
止制御等を行なうことができる。 Therefore, the duplication signal DS notifies the user of the duplication of sheets 2, and can be used to control the automatic stop of the printing press.
なお、スイツチSS1は、枚葉紙２の絵柄上、例
えば、各投受光器の検査対象部位の絵柄が墨色で
ある場合、墨色の網目率Ｍのほゞ均一な範囲と対
向する受光器を選択するものとして操作され、選
択した受光器と対向する絵柄の範囲における墨色
の網目率Ｍに応じて可変抵抗器VR1が調整され
る。 In addition, if the pattern of the sheet 2 is such that, for example, the pattern of the area to be inspected on each emitter/receiver is black, the switch SS 1 can detect the photoreceiver facing a substantially uniform range of black mesh ratio M. It is operated as a selection, and the variable resistor VR 1 is adjusted according to the black mesh ratio M in the range of the picture facing the selected light receiver.
第９図は、他の実施例を示す回路構成図であ
り、受光器６ａ，６ｂに太陽電池SB1，SB2を用
いると共に、重複検出に比較器CPを用いており、
スイツチSS1により選択した太陽電池SB1または
SB2の出力を、トランジスタQ11および抵抗器R11
による増幅器によつて増幅のうえ、抵抗器R12を
介して比較器CPの一方の入力へ与えると共に、
電源電圧＋Ｖを抵抗器R13および定電圧ダイオー
ドZD1により安定化した後、ポテンシヨメータ
VR2により分圧した基準電圧を比較器CPの他方
の入力へ与えており、基準電圧に応じて判別レベ
ルを設定している。 FIG. 9 is a circuit configuration diagram showing another embodiment, in which solar cells SB 1 and SB 2 are used for the light receivers 6a and 6b, and a comparator CP is used for overlap detection.
Solar cell SB 1 or selected by switch SS 1
Connect the output of SB 2 to transistor Q 11 and resistor R 11
is amplified by an amplifier, and is applied to one input of the comparator CP via a resistor R12 .
After stabilizing the supply voltage +V with resistor R 13 and voltage regulator diode ZD 1 , potentiometer
The reference voltage divided by VR 2 is applied to the other input of the comparator CP, and the discrimination level is set according to the reference voltage.
したがつて、スイツチSS1の操作に応じ、枚葉
紙２の絵柄上、例えば、各投受光器の検査対象部
位の絵柄が墨色である場合、墨色の網目率Ｍの変
化が少ない範囲を検出対象部位として任意に選定
できるため、枚葉紙２の供給位置が変化しても、
重複検出を安定に行なうことができる。 Therefore, according to the operation of the switch SS 1 , if the pattern of the sheet 2 is black, for example, the pattern of the inspection target area of each emitter/receiver is black, a range in which the mesh ratio M of the black color changes little is detected. Since the target part can be selected arbitrarily, even if the feeding position of the sheet 2 changes,
Duplicate detection can be performed stably.
たゞし、スイツチSS1の操作によつても不十分
な場合は、相対向する投光器および受光器を同時
に移動させ、墨色の網目率Ｍの変化が少ない範囲
と対向する状態とすればよい。 However, if the operation of the switch SS 1 is not sufficient, the emitter and the light receiver facing each other may be moved at the same time so that they face a range in which the black mesh ratio M has little change.
このほか、投光器および受光器は、状況に応じ
て各複数を用いればよく、検出回路の構成も選定
が任意であるうえ、移動できる投光器および受光
器をいずれかの１組のみとしても同様であり、移
動方向を横方向のみならず、縦方向としてもよ
く、種々の変形が自在である。 In addition, a plurality of emitters and receivers may be used depending on the situation, and the configuration of the detection circuit can be selected arbitrarily. The moving direction may be not only the horizontal direction but also the vertical direction, and various modifications are possible.
たゞし、投光器および受光器の移動方向は、枚
葉紙２の縦方向が前当３により規正されるため、
縦方向に対する絵柄の網目率変化は少なく、横方
向に対する網目率変化が大きいことにより、横方
向へ移動自在とすることが効果的である。 However, since the longitudinal direction of the sheet 2 is regulated by the front plate 3, the moving direction of the emitter and the receiver is
Since the change in mesh ratio of the pattern in the vertical direction is small and the change in mesh ratio in the horizontal direction is large, it is effective to make the pattern freely movable in the horizontal direction.
以上の説明により明らかなとおり本考案によれ
ば、印刷済の枚葉紙に対しても重複検出が確実か
つ安定に行なえるものになると共に、中央部に近
い絵柄印刷部において検出を行なうため、直前に
供給された枚葉紙の後縁がフイーダボード上から
完全に送出される以前に重複検出を行なえるもの
となり、検出時点が従来に比して早く設定され、
検出々力に基づく印刷機の制御に時間的な余裕が
生じ、停止制御等が良好に行なわれるものとなる
等、枚葉紙の重複検出において多大な効果が得ら
れる。
As is clear from the above explanation, according to the present invention, duplication detection can be performed reliably and stably even on printed sheets, and since the detection is performed in the pattern printing area near the center, Duplicate detection can be performed before the trailing edge of the sheet fed just before is completely fed out from the feeder board, and the detection point can be set earlier than before.
There is ample time to control the printing press based on the detection force, and stop control and the like can be performed effectively, resulting in great effects in detecting duplicate sheets.
第１図乃至第３図は従来例を示し、第１図は枚
葉紙供給機器の要部破断側面図、第２図は検出点
の配置状況を示す斜視図、第３図は枚葉紙がずれ
て重複した状態により供給された状況の斜視図、
第４図は絵柄の網目率と受光器の出力電圧との関
係を示す図、第５図以降は本考案の実施例を示
し、、第５図は要部破断斜視図、第６図は投光器
の斜視図、第７図は投光器の取付状況を示す側断
面図、第８図および第９図は回路構成を示す図で
ある。
１……フイーダボード、２……枚葉紙、３……
前当、６ａ，６ｂ……受光器、７……シヤフト、
１０……絵柄印刷部、２１，２１ａ，２１ｂ……
透孔、２２ａ，２２ｂ……ホルダ、２３ａ，２３
ｂ……押ねじ、３１……保持板、３２……長孔、
３３……ねじ、Ｌ，L1，L2……ランプ、Q1，Q2
……受光トランジスタ、SS1……スイツチ、SB1，
SB2……太陽電池。
Figures 1 to 3 show conventional examples, Figure 1 is a cutaway side view of the main parts of the sheet feeding device, Figure 2 is a perspective view showing the arrangement of detection points, and Figure 3 is a sheet feeding device. a perspective view of the situation provided by the misaligned and overlapping condition;
Fig. 4 is a diagram showing the relationship between the mesh ratio of the pattern and the output voltage of the light receiver, Fig. 5 and subsequent figures show examples of the present invention, Fig. 5 is a cutaway perspective view of the main part, and Fig. 6 is the emitter. FIG. 7 is a side sectional view showing how the projector is attached, and FIGS. 8 and 9 are diagrams showing the circuit configuration. 1...Feeder board, 2...Sheet paper, 3...
Front cover, 6a, 6b...Receiver, 7...Shaft,
10...Picture printing section, 21, 21a, 21b...
Through hole, 22a, 22b...Holder, 23a, 23
b...Press screw, 31...Retaining plate, 32...Long hole,
33...Screw, L, L1 , L2 ...Lamp, Q1 , Q2
...Photodetector transistor, SS 1 ...Switch, SB 1 ,
SB 2 ...Solar battery.
Claims (1)
として供給された枚葉紙の絵柄印刷部と対向す
る位置へ互に離間して設けた複数の投光器と、 該各投光器と前記枚葉紙およびフイーダボー
ドを介して各個に対向する位置へ設けた複数の
受光器と、 前記フイーダボードの前記各投光器および受
光器と対向する部位へ設けた透孔と、 前記各受光器のうち墨色の網目率のほゞ均一
な範囲と対向する受光器の出力を選択し得るス
イツチと、 このスイツチにより選択された受光器の出力
が与えられる検出回路と からなることを特徴とする枚葉紙の重複検出装
置。 (2) 複数の投光器および受光器中の少なくともい
ずれかを互に対向して水平方向へ移動自在にす
ると共に、フイーダボードの透孔を前記移動方
向に沿つた長孔としたことを特徴とする実用新
案登録請求の範囲第１項記載の枚葉紙の重複検
出装置。[Scope of Claim for Utility Model Registration] (1) A plurality of floodlights provided spaced apart from each other in positions facing the pattern printing portion of the sheet supplied with the leading edge pressed against the front end of the feeder board; , a plurality of light receivers provided at positions facing each of the light emitters, the sheet of paper, and the feeder board; a through hole provided in a portion of the feeder board facing each of the light emitters and the light receiver; It is characterized by comprising a switch capable of selecting the output of the light receiver that faces the almost uniform range of black mesh ratio among the light receivers, and a detection circuit to which the output of the light receiver selected by this switch is given. Sheet duplication detection device. (2) A practical use characterized in that at least one of a plurality of projectors and light receivers is made to face each other and can move freely in the horizontal direction, and the through hole of the feeder board is a long hole along the movement direction. A sheet duplication detection device according to claim 1 of the patent registration claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP873983U JPS59116337U (en) | 1983-01-25 | 1983-01-25 | Sheet duplication detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP873983U JPS59116337U (en) | 1983-01-25 | 1983-01-25 | Sheet duplication detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59116337U JPS59116337U (en) | 1984-08-06 |
| JPH0522519Y2 true JPH0522519Y2 (en) | 1993-06-10 |
Family
ID=30140220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP873983U Granted JPS59116337U (en) | 1983-01-25 | 1983-01-25 | Sheet duplication detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59116337U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4766520B2 (en) * | 2006-05-15 | 2011-09-07 | 株式会社リコー | Image forming device, paper type detection device |
-
1983
- 1983-01-25 JP JP873983U patent/JPS59116337U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59116337U (en) | 1984-08-06 |
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