JPS6188387A - Sheet paper discriminator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field to which the Invention Pertains] The present invention relates to a Gibutsu discrimination device fif used in an automatic printing machine, etc.
A sheet of paper is conveyed between opposing poles formed by opposing four detection poles, such as fi, and the state of the sheet is determined by detecting the static capacitance between the opposing electrodes. paper sheet discrimination device,
In particular, the present invention relates to an electrode groove structure capable of sensitively detecting foreign substances such as dirt attached to paper sheets and cellophane tape stuck to paper sheets.

[Prior art and its problems]

In the conventional disaster prevention equipment, the condition of paper sheets, such as the presence or absence of such paper sheets, their stacking status, and the presence or absence of foreign objects stuck to them, was initially determined mechanically using a needle-like probe. A method of detecting the thickness of paper sheets and driving a microswitch, or a method of projecting light onto the paper sheets and detecting the amount of transmitted light using a light/shield element were adopted, but the former method Blow≠
Since this is a method of expanding the thickness of the paper sheet by bringing the tip of the paper into contact with the paper sheet, it is possible to use paper sheets with multiple overlapping Chijiba rolls or cellophane tape attached to the four branches. A machine for distinguishing between a sheet of paper and a normal sheet/top (not only is the hot spring in step 4 extremely difficult, but also the needle-like bulge vibration that occurs due to the presence of folds in the sheet) There is a problem that malfunctions in the discrimination operation are likely to occur due to the vibration of the forging mechanism that feeds the paper sheets, and the latter method may be affected by external light, If the paper sheet is attached to a transparent tape, there is a problem of not being able to detect foreign matter. Parallel plate detection/tortoise: A capacitance discriminator that detects the condition of paper products by frost-feeding the paper sheets between the poles and detecting the static magnetism '4jkC between both detection poles. It has become common (Special application 1973)
8-5739).

FIG. 4 shows the operation of such nP cosmetic discriminator 4.
I + ll to do brother June: 1 raw -, I m j 53
4.4 '+'jb L (1 o'clock + 1 B1 =, the vertical position indicates the above-mentioned Shizusha container C, and 'l' indicates that the conveyed paper sheet is between both detection electrodes. The time when I started entering, '4
is the time when the paper sheet is sent out from the pole after the rain detection t, t is the time when a foreign object such as the speaker starts appearing on the paper sheet, and t is the time when the foreign object (( This is the time when the photon is emitted.co is the C (D value) when the paper iJ term is not inserted between the rain detection electrodes, and CI is the time between the four rain detection electrodes (if A9 of this paper sheet is pasted). The value of C when the missing part is inserted,
'4 is the value of C when the paper sheet with the foreign object pasted between the four rain detection poles is inserted, and ΔC1 and ΔC2 are the difference expressed by (11 formula ζ), respectively. It is capacitance.

In the above-mentioned capacitance type discriminator, when a paper sheet passes between opposing rain detection electrodes, a temporal change in capacitance, such as the fourth column 4, is detected. 1. , gl? <, △C0 is, for example, 50 (pF) humidity, whereas △C2 is, for example, 2 (pF).
(PF', a change in capacitance of about 1 is caused by noise incident on the detection voltage, etc., and C, which is the basis of ΔCzK3,
Since ΔC2 easily occurs in the value of I, it is difficult for conventional paper sheet discrimination devices that operate based on ΔCt to detect ΔC2. Therefore, it is difficult to detect ΔC2 with high sensitivity. The problem is that it doesn't work.

[Purpose of the invention]

The present invention solves the problems of the conventional capacitance-type ÷j separation apparatus as described above, and can easily determine whether a foreign object such as cellophane tape is attached or not. Adult leaf L'i'
The purpose is to provide illuminations j and f.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention has a Φ feeding path for paper sheets; In Gibun Sekibetsuhan + 4'''□, which uses Tsukasa's 1 Jyo' Shinyo Zen as 1 to determine the state of 4' Ushihacho, the above-mentioned attack crawl (Yu is faced by multiple groups of Ansu and Sho; and these elements are opposed to each other (if and FK are used to detect static changes in the 1% direction of the route divided by each).Thus:
9. Multiple sets of element facing electrodes are arranged so that the width of the transmission wave is all waved, and the capacitance between the element facing electrodes is individually detected; As a result, detection is performed on the part of the paper sheet to which a foreign object such as cellophane tape has been affixed. Therefore, it is possible to obtain a paper sheet discriminating device that is capable of discriminating paper sheets.

[Practice of the invention]

First, the basic operating principle of the present invention will be explained. That is, Mi
In the conventional discriminator that detects the increase in capacitance △C2 caused by the binding of foreign matter to Class 41, as described in J, external noise, etc. causes a change in ΔC1 to the same extent as the value of ΔC2. The sensitivity of the discriminating operation was poor due to the presence of noise, but now the ratio ΔCt/
Considering ΔC,=k, it is thought that ΔC1 also undergoes changes due to external noises at the same rate as the fluctuations that occur in ΔC2 due to these factors, so there is no foreign matter in such a ratio. Shadow of extraneous noise etc. when determining the presence or absence of adhesion 1
, and k is obviously ΔC,
If iA is small, it will be a large shift. In other words, in order to determine the presence or absence of a foreign object, the conventional static detection type detection device uses a static detection hole (with a wide detection area) that covers the entire width of the conveyance path of the paper sheet.・There is a set of facing
If k is determined using the detection a, which has a smaller area than the detection tjL pole, this k will be affected by external noise, etc. Since the occurrence of foreign matter is less likely to occur and the value of k is large, it becomes easier to determine whether a foreign object is attached or not. In this way, in the static/α capacitance type discriminator, ΔC1+ΔC2 is detected using a detection voltage with a small area, and ΔC2/Δ
The basic operating principle of the present invention is to obtain C1 and perform the discrimination operation.

FIG. 1 is a schematic diagram of the one-pointed terminal of the paper sheet discriminating device according to the present invention which employs the above-mentioned operating principle, and FIG. 42 is a plan view of the main parts of the device shown in FIG. , FIG. 3 is a straight side view of the 1-year-old boy shown in FIG.

In FIGS. 1 and 3, reference numeral 1 indicates a conveyance path in which paper sheets 2 to be determined are conveyed by a transport mechanism (not shown), and numerals 3 and 4 indicate the conveyance path 1 through φ! They are the bottom plate and the top plate, respectively. Both the bottom plate 3 and the top plate 4 are fixed to the projecting body 5. Arrow P is the conveyance direction of the paper sheet 2, and FIG. Lower blowout 1cf, pole, above-mentioned
6 is an element facing IJ consisting of detection electrodes 6a and 6b, i
4. The machines 6a and 6b are both shaped like a flat plate); Electrical insulating members 5c and 6d are attached to the lower frame member 7 and the upper frame member 8, respectively, whose ends are fixed to
has been fixed through. 9 is 4@6 a, 6 b
This is a gap in the vertical direction of the conveyance path 1 formed between the two.

6* is a conductor that connects the insulating member 6C and the frame member 7 to rt A L/ S to take out the potential of the bottom 6a. - Edis 6b through shellfish,
It is a conductor wire designed to take out the position.

10a and lla are flat plates that are sent along with the electrode 6a and insulatively fixed to the frame member 7. 1tiflj, 10b and 11b are mounted on the frame parallel to and opposite to the Kll poles 10a and 11a, respectively, similarly to the electrode 6b. The flat plate +i fixed to the material 8, LO is 'd'i'ff1lOa and 10b
The reference numeral 11 designates the electrodes 11 and 11, each of which is a calibrator counter electrode, which is formed in the feed path 1 by being electrified as described above.

lQe and 10f are the conductor wires for taking out each tiL of the fertile poles 10a and 10b, lie and llf are 'KL!
11a and llb, and take out the 4th position of each, and it is 4 green. 12.13; P is a guide forming the side wall of the conveyance path 1, W is the ・ii, S of the conveyance path l, element facing 4, 6 degrees, 10.11 is the guide forming the side wall of the conveyance path 1 as shown C+i+2 +, 9 are placed at 14 intervals. 14 is a lower frame member which is 1f higher than the frame member 7 and horizontally hung between the casings 5 and 5 so as to be parallel to the frame member 7 so that it becomes At 'JFI under the leaf c transmission; Reference numeral 15 denotes an upper rack which is horizontally hung between the cylinders 5 and 5 in a position that is located downstream of the sheet material 8 and opposite to the sheet material 14 and is parallel to the material 14. Materials 16b and 17b are the same as ``4 and 6b'' and are completely attached to the frame 15. 16 is flat and opposite to 'iM!k 16 b, and is attached to the lower frame member 14 with 'jIL 6a'. Similarly, a flat plate iii t;'i 16 a fixed insulatingly
and Ig fallen 16 b, and each of these opposing 'j'
Jsu'% is formed in the above-described manner so that the opposing elements formed on the conveyance path 1 are -+4 and 17 are ii+nu
b and a flat plate electrode 17a fixed to the lower frame member 14, with both electrodes facing each other; : It is a summary. 16e and 16f were made to have 9- and 9-year-old nationals in each of the 4th day of the 1st and 16th, and 17e,
17f is the same conductor wire as J Jun, $6e, 6f, which takes out the 4th position of each screw in I°C Eme 17. The opposite sides 16 and 17 are also arranged at intervals in the width direction of the conveyance path 1.

Since the element facing 6L poles 6, 10, 11, 16, and 17 are each formed as one as described above, the conductors 1Ge, 6f,
10e, 10f, lie, llf, 16e, 16f, 1
7e and 17f, the static 4 volume 1 between each opposing tit ball is detected, but in this case, the above-mentioned 5 pairs of weekly pairs are detected.
Tanikudou 1, 1. I"t, ' of the transport path 1, which is divided into sections, is arranged so that one direction of the C1--9 transport path is all circulated depending on the detection range. 18 is a signal element to which the above-mentioned grooves +6c to 17f are connected, and this processing section 18 is connected to the above-mentioned Compensation officer C0
6111 is first set, and when the paper sheet 2 is generally fed between each opposite side -+t4M, the static formation volume ric, , c2 described above is
After measuring ΔC1 and ΔC2 according to equation (1),
Furthermore, it is configured to perform a calculation of ΔC2/ΔC1 to determine whether or not a foreign object is attached to the paper sheet 2. Reference numeral 19 denotes an insertion opening for inserting paper sheets 2 into the conveyance path 1, and 20 denotes a storage (not shown) for storing low-sized sheets 2 that have been conveyed to the downstream conveyance path after passing through the counter electrodes 6 to 17. A paper sheet discriminating device 21 is composed of the above-mentioned parts.

Since the Goku-class discrimination device Jt21 is constructed as described above, the sheet of paper A2 is placed between the upper and lower detection electrodes constituting each of the opposing electrodes 6 to 17 (generally fed). and,
The signal processing unit 18 calculates △Ct/ for each of the opposing signals 6 to 17.
Calculation of ΔC5 is performed and k is not affected by external noise etc.
is obtained, and this k is large because the area of the detection electrode is small, so in such a discriminating device d21, it is difficult to detect whether there is an abnormality such as sellotape attached to the paper sheet 2. is determined with good sensitivity.

It is clear from the above-mentioned principle of operation that the discrimination device 1-121 can detect stains on paper sheets 2. Discriminator: Element counter electrodes 6 to 1 in <21
7 are disposed in the width direction of the conveyance path 1 as described above, no matter which part of the material 12 has a foreign material affixed to it, this foreign material will be removed without exception.

It is clear from the above explanation that in the present invention, the number of sets of d-shaped meshes between element pairs and the arrangement λ of the element-opposed 4-shaped meshes are not limited to those of the above-described embodiments.

〔Effect of the invention〕

As mentioned above, in the present invention, f around low -ffj
i,) The low-leaf material is sent η to the opposite side +'J, ``:;'i that was hit on the z feed path, and the electrostatic charges between the opposite sides ゛4 are detected to detect the paper sheet. In a paper sheet discriminating device that performs state discrimination, the counter-discriminator is made up of a plurality of sets of element counter-electrons, and each of these element counter-electrons is responsible for static kicking capacity in the ■ direction of the conveyance path. Multiple sets of elements and the same electrodes are arranged so that the entire width of the 'Lυ feed path is covered by the knee! detection range, and the capacitance between the elements and the crown electrodes is individually detected. With this configuration, the static capacitance of the portion of the paper sheet vA to which a foreign object such as cellophane tape is attached is detected at the electrode facing the element, and as a result, the presence or absence of a foreign object can be detected with high sensitivity. A paper sheet discriminator that can distinguish between 1t and 100%.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of one example of the present invention, Fig. 2 C is a plan view of the main part in Fig. 1, and Fig. 3 is an X in Fig. 1.
-X section side view. 1... Conveyance path, 2... Paper leaf fβ, 6, 10, 11, 1
6.17... Element counter electrode, 21... Paper sheet discrimination device, W, width of conveyance path. Figure 2 Figure 3 C Figure 4 ``Procedural amendment written form'' 3. To correct... ・Relationship with B f'l= Output Address River, il ::+:',,)Ll,-I'
ll J 151 name +523) Fuji'-si,,4. ”Company address: 1-1-5 Tanabeshinden, Kawasaki-ku, Kawasaki City, Amended Directive [J attached Showa g
Year 0/JI Amano 1-16, number of inventions increased by amendment The following sentence is added to the end of the fourth line of page 13 of the specification of contents of the amendment. "Figure 4 is a characteristic diagram for explaining the operation of the electrostatic 8-line type discriminator."! Kiritoi and Yamaguchi 1

Claims (1)

[Claims] In a paper sheet discriminating device that transports the paper sheet between opposing electrodes provided on a paper sheet transport path and detects the capacitance between the opposing electrodes to determine the state of the paper sheet, The counter electrode is made up of a plurality of sets of element counter electrodes, and the width direction of the transport path is entirely covered by a capacitance detection range in the width direction of the transport path that is assigned to each of the element counter electrodes. arranging the plurality of sets of element facing electrodes;
A paper sheet discrimination device characterized in that the electrostatic capacitance between the element facing electrodes is individually detected.