JPH07304542A - Paper double feed detection device - Google Patents

Abstract

(57) [Summary] [Purpose] The user automatically uses the double feed detection level setting mode provided in the automatic certificate issuer to automatically set the threshold value for the paper to be used as a double feed. An object of the present invention is to provide a double feed detection device for sheets that can be set. A double feed detection level setting mode for determining a double feed detection level of a sheet of paper that a user wants to use is set by touching a touch panel 4 portion of an item displayed on the CRT display device 3. After that, the paper 1
The double feeding of sheets is determined based on the result detected by the sheet detection unit 80 in the state where the sheets are conveyed and the result detected by the sheet detection unit 80 in the state where the two sheets are conveyed in the conveying path 55 in a stacked state. CPU threshold value
13 is calculated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet double feed detecting device for detecting a double feed state of sheets conveyed on a conveying path.

[0002]

2. Description of the Related Art Conventionally, for example, in an automatic certificate issuing machine, when an applicant selects a certificate, printing is started by obtaining information from a database of the issuing machine, but printing is performed depending on environmental conditions at that time. Paper sometimes double-fed. In case of double feed, unprinted paper will be sent together with the printed paper. Therefore, discard all the double fed paper so that the unprinted paper does not reach the applicant in the automatic delivery machine. There are functions such as. In order to determine the presence / absence of such double feeding of paper, for example, one set or a plurality of sets of light emitting elements and light receiving sensors are used, a threshold value for detecting double feeding is set in advance, and the paper is placed between the light emitting elements and the light receiving sensors. After passing, the presence or absence of double feeding was determined by the amount of transmitted light at that time.

[0003]

However, in the conventional double-feeding detecting device as described above, the voltage level of the light-receiving sensor, which changes depending on the amount of light emitted from the light-emitting element, is adjusted within a predetermined range, and the paper used. However, there is a problem in that, when the types are different, the amount of transmitted light must be measured each time, and the threshold value for detecting double feeding must be changed.

The present invention has been made in order to solve the above-mentioned problems, and a user himself / herself uses a sheet double feed detection level setting mode to determine a sheet to be used as a sheet double feed threshold. The purpose is to be able to set the value automatically.

[0005]

In order to achieve this object, a sheet double feed detecting apparatus of the present invention sets a mode for determining a double feed detection level of a desired sheet to be used. In the mode set by the sheet detecting means for detecting the sheet conveyed in the conveying path and the double feed detection level setting means, the sheet detecting means detects the sheet while one sheet is conveyed in the conveying path. And a calculation unit that calculates a threshold value for determining the double feeding of the paper based on the result and the result of the detection by the paper detection unit in a state where the two papers are overlapped and conveyed on the conveyance path. .

Further, the paper detecting means is installed so as to oppose the light emitting means so as to face the conveying path, and oppose the light emitting means with the light emitting means sandwiched between the conveying paths, and the light is emitted from the light emitting means. And a light receiving means for receiving light,
The sheet being conveyed may be detected by the amount of transmitted light.

Further, the calculating means sets the paper to 1 in the conveying path.
One half of the amount of transmitted light obtained by adding the amount of transmitted light detected by the sheet detecting means in the state of conveying the sheets and the amount of transmitted light detected by the sheet detecting means in the state of stacking two sheets on the conveying path. The value may be the threshold value.

[0008]

In the paper multi-feed detection device of the present invention having the above-described configuration, the mode for determining the multi-feed detection level of the paper that the user wants to use is set by the multi-feed detection level setting means.

After that, based on the result detected by the sheet detecting means in the state where one sheet is conveyed to the conveying path and the result detected by the sheet detecting means in the state where two sheets are conveyed while being superposed on the conveying path. A threshold value for determining the double feeding of the paper is calculated by the calculation means.

Further, the sheet detecting means is installed so as to oppose the light emitting means so as to face the conveying path and the light emitting means so as to oppose the light emitting means with the conveying path interposed therebetween, and light is emitted from the light emitting means. And a light receiving means for receiving light,
The sheet being conveyed is detected by the amount of transmitted light received by the light receiving means.

Further, the calculating means sets the paper to 1 in the conveying path.
The half value of the amount of transmitted light obtained by adding the amount of transmitted light detected by the sheet detecting means in the state of conveying the sheets and the amount of transmitted light detected by the sheet detecting means in the state of stacking two sheets is the value Calculate as a threshold value.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in an automatic certificate issuing machine will be described below with reference to the drawings.

FIG. 2 shows an external view of the automatic certificate issuing machine according to this embodiment. As shown in FIG. 2, various information such as a user ID identification code including a personal identification number of each user is recorded on the front panel of the casing 1a of the automatic certificate issuing machine 1 of this embodiment. A card insertion slot 2a for inserting an ID card (not shown) is provided, and a well-known card reader 2 is provided behind the card insertion slot 2a. Above the card reader 2, a CRT display device 3 for displaying operating methods and guidance, and a CRT display device 3 are provided.
There is provided a well-known touch panel 4 on which a user can input desired information by directly touching the image portion displayed on. A call button 22 is provided near the magnetic card reader 2 to call an attendant when trouble occurs, and below the call button 22, a person using a wheelchair automatically issues the certificate. Machine 1
An assist bar 42 is provided so that it can be easily operated when using the.

Further, below the assist bar 42, a part of the casing 1a is such that the lower part of the knee of the person in the wheelchair can be accommodated so that the user of the wheelchair can easily use it. A space portion 43 having a size is formed, and the space portion 43
A shock absorbing sheet 44 is provided on the inner side surface of the shock absorbing sheet 44 to absorb a shock when a part of the wheelchair collides. Further, the height and position of each operation unit of the automatic certificate issuing machine 1 are laid out so that even a wheelchair user can easily operate.

On the right side of the touch panel 4, there are formed a coin insertion slot 5a and a bill insertion slot 6a for paying a fee, which are well-known coin mech 5 respectively.
And communicates with Bill Bali 6. Below the coin insertion slot 5a and the bill insertion slot 6a, an outlet 8 for taking out change and receipts and a laser printer 1 described later.
Discharge port 7 for discharging certificates such as resident cards printed in 1.
And are formed. Further, above the touch panel 4, there is provided an operation display device 10 indicating whether or not the certificate automatic issuing machine 1 is in a usable state.

Next, the automatic certificate issuing machine 1 will be described with reference to FIG.
The schematic configuration of will be described.

As shown in FIG. 1, a laser printer 11 is provided at the bottom of the housing 1a for printing predetermined matters on documents such as a resident's card.
The laser printer 11 is provided with a discharge port 11a for discharging printed documents. A conveyance path 55 for conveying a document upward is provided in the vicinity of the exit of the discharge port 11a. A plurality of light emitting diodes 81 as light emitting means, which are installed so as to face the transport path, are arranged below the transport path 55. The light emitting diodes 81 are disposed above the transport path 55 so as to face the light emitting means across the transport path. And a photo sensor 82 as a light receiving means for receiving the light emitted from the light emitting means.

In the conveyance path 55, the document judged as the double feeding by the light emitting diode 81 and the photo sensor 82 is separated by the separation chute 58 and dropped and stored in the storage part 59 at the lower right side. Documents that are not determined to be double-fed are conveyed to the left through the upper conveyance path 57 and are placed on the intermediate tray 60. When the number of documents is plural, the documents sequentially printed by the laser printer 11 sequentially pass through the transport paths 55 and 57, and are sequentially stacked and placed on the intermediate tray 60.

On the left side of the intermediate tray 60, there is arranged a paper discharge unit 53 consisting of a discharge unit 53b and a pressing unit 53a which are arranged opposite to each other. The discharge tray 53b and the pressing unit 53a are vertically driven by a vertical driving device (not shown) to form a gap. When the number of sheets is one, the sheet is placed on the discharge tray 53b through the gap, and the pressing unit 53 is held.
One sheet of paper sandwiched between a and
Is discharged to the outside through the opened discharge port 7. Further, when there are a plurality of documents, the intermediate tray 60 is switched upward as shown by the dotted line, the plurality of documents are bound by the stapler 14 described later, and tallyed by the tallying machine 15, and then the intermediate document. It is returned to the tray 60, and the intermediate tray 60 is returned downward again (shown by the solid line). Then, a gap is formed between the presser unit 53a and the discharge tray 53b, and after the bound document is inserted into this gap, the presser unit 53a is lowered to press the bound document downward. It is conveyed while being attached, and is discharged to the outside from the discharge port 7 in which the door 107 is opened.

Next, with reference to FIG. 3, an electrical control configuration of the automatic certificate issuing machine 1 will be described.

The automatic certificate issuing machine 1 of this embodiment operates according to a command from the CPU 13 connected to the host computer 31. The CPU 13 includes the card reader 2, the CRT display device 3, the touch panel 4, the coin mech 5, the bill burr 6, the laser printer 11 described above.
The call button 22 is connected, the journal printer 12 for printing a receipt, the paper detection unit 80 as a paper detection unit for detecting the paper printed by the laser printer 11 on the conveyance path, and the document conveyance A sheet conveying unit 51 for aligning and aligning, a stapler 14 for binding the edges of the documents when the laser printer 11 has a plurality of documents, and a signature for imprinting the documents. Machine 15, a voicing device 16 for audibly explaining an operation method, and a CPU 13
HDD1 for storing operation programs for controlling
7, a floppy disk device (FDD) 18, and a remote panel 3 for notifying a person in charge of the operating status of the automatic certificate issuing machine 1 and that the call button 22 has been pressed.
3 and 3 are connected.

Further, the host computer 31 has
A database 32 that stores data such as family register and address of each inhabitant is connected.

Next, the operation of the automatic certificate issuing machine 1 having the above configuration will be described with reference to the flowchart shown in FIG. In the automatic certificate issuing machine 1, the CPU 13 constantly monitors whether or not the ID card is inserted into the card insertion slot 2a (step 1, hereinafter, step is represented by S), and in this monitoring state, the CRT display device is displayed. In 3,
A card insertion screen for instructing the insertion of an ID card is displayed according to an instruction from the CPU 13. When detecting that the ID card is inserted, the CPU 13 instructs the card reader 2 to read the data. Card reader 2 has ID
The data recorded on the card is read, and the CPU 13
Transfer data to. The CPU 13 confirms whether the inserted ID card is a card for the automatic certificate issuing machine 1 (S2).

If this card is not the card for the automatic certificate issuing machine 1 (NO in S2), I from the card insertion slot 2a
The D card is ejected (S3), and that effect is displayed on the CRT display device 3
(S4). On the other hand, if the card is a card for the automatic certificate issuing machine 1 (YES in S2), the CPU 13
Displays the personal identification number input screen on the CRT display device 3 and at the same time sends a signal to the voicing device 16 to say "Please input the personal identification number" (S5). When the user touches the touch panel 4 and inputs the personal identification number (YES in S6)
S), the CPU 13 transmits the user ID identification code recorded on the ID card and the input personal identification number to the host computer 31. Host computer 31 is CP
The user ID identification code transmitted from U13 is collated with the personal identification number (S7), it is checked whether they match (S8), and the result is transmitted to the CPU 13.

If the password is not correct for the user ID identification code (NO in S8), the CPU 13 again
Display the password input screen on the CRT display device 3 (S
The password is re-input together with 5) (S6). If the personal identification number is correct (YES in S8), the CPU 13
While displaying the certificate selection screen on the CRT display device 3,
A signal is sent to the voicing device 16 to say "Please select the required certificate" (S10). The user selects the required certificate by touching the touch panel 4 on the portion where the required certificate is displayed (YES in S11). Next, the CPU 13 displays a copy number selection screen on the CRT display device 3 and sends a signal to the voicing device 16 to say "Please select the required number of copies" (S12). The user touches the touch panel 4 to select the required number of copies (YES in S13). Then, the CPU 13 calculates the fee for the certificate selected by the user, and CR is displayed on the fee input screen.
At the same time as displaying on the T display device 3, a signal is sent to the voicing device 16 to utter "Fee is XX yen. Please pay" (S14).

When the user inputs a fee (YE in S15)
S), the CPU 13 confirms that the fee has been collected, transmits a command to the card reader 2, and the card insertion slot 2
Eject the ID card from a. After that, when it is detected that the ID card is taken out, a screen notifying that the certificate is being created is displayed on the CRT display device 3. In addition, a signal is also sent to the vocalization device 16 to say "I am currently preparing a certificate, please wait" (S
17).

Following the above-mentioned preparation guidance,
The CPU 13 requests the host computer 31 for data necessary for issuing a certificate. The host computer 31 searches the database 32, extracts necessary information from data such as the user ID identification code obtained from the ID card and the selected document type, and transmits the necessary information to the CPU 13. The CPU 13 sends the data transferred from the host computer 31 to the laser printer 11 for printing (S
18).

After that, whether or not the printed sheets are double-fed is compared with a threshold value described later and a voltage value related to the amount of transmitted light measured by the double-feed detection unit 80 (S22). In the case of double feed, the voltage relating to the amount of transmitted light by the double feed detection unit 80 becomes lower than the voltage in the case of non-double feed. Therefore, when the voltage related to the amount of transmitted light is smaller than or equal to the threshold value (NO in S22), it is determined that the multi-feed is performed, the above-described multi-feed processing is performed (S24), and then the printing is performed again. Therefore, the processing shifts to S18.

If it is not determined in S22 that the multi-feeding has occurred (YES in S22), the certificate printed by the laser printer 11 is bound at its end by the stapler 14 and is stamped by the tallying machine 15. , Is discharged from the discharge port 7 (S19). After that, the CPU 13 displays the end screen on the CRT display device 3 and sends a signal to the voicing device 16 to say "Certificate is complete. Please take care. Be careful not to forget receipts and cards." (S20).

After a while, the CPU 13 displays the same card insertion screen as described above on the CRT display device 3, and repeats the above operation. Also, the remote panel 3
3 is provided in the hand of the person in charge, and when the user presses the call button 22 or when the printing paper in the automatic certificate issuing machine 1 runs out, these are displayed by a lamp or a buzzer. Notify the staff.

Next, with reference to FIGS. 2 and 5, the procedure for setting the double-feed detection level for automatically determining the threshold value for determining double-feed of the present invention will be described.
The program shown in FIG. 5 is started by touching the "maintenance mode" item displayed on the touch panel 4 as the double feed detection level setting means for setting the mode for determining the double feed detection level of the paper to be used. To be done.

First, on the CRT display device 3, a message "Do you want to set the double feed detection level?" Is displayed (S3).
4) By touching the touch panel 4 in the portion where NO is displayed (NO in S34), the mode for determining the double feed detection level of the sheet to be used ends. In addition, by touching the portion where YES is displayed in S34 (YES in S34), the CRT display device 3
The message "Please set the paper for which the double feed detection level is set in the laser printer" is displayed above (S35), and then "Could you set the paper in the printer?" On the CRT display device 3 as well. It is displayed (S36).

The user sets the desired paper in the laser printer 11 and touches the touch panel 4 on the portion where YES is displayed (YES in S36), whereby the automatic certificate issuing machine 1 sets the double feed detection level setting mode. Then, the operation is started, and the above-mentioned sheets are sent out one by one without printing from the laser printer 11 (S37). NO in S36
By touching the touch panel 4 in the portion where is displayed (NO in S36), the process proceeds to S35.

The fed paper is laser printer 11
Of the light emitted from the upper discharge port 11a, passes through the conveyance path 55, reaches the double feed detection unit 80 including the light emitting diode 81 and the photo sensor 82, and only the amount of light transmitted through the paper out of the light emitted from the light emitting diode 81. Is received by the photo sensor 82. At this time, there are n pairs of the light emitting diode 81 and the photo sensor 82, and m
If the measurement is performed twice, the voltage values received by the photosensor 82 and photoelectrically converted are Vs1-1 to Vs1-m, Vs2-1 to Vs2-m,
The data is stored in the HDD 17 as Vsn-1 to Vsn-m (S38). In order to obtain more accurate data, it is preferable that the number of times of sampling m be as large as possible in one sheet of paper. The sheet that has passed the double feed detection unit 80 passes through the conveyance path 57, is continuously discharged onto the intermediate tray 60, further passes through the sheet discharge unit 53, and is automatically issued with a certificate from the discharge port 7. It is discharged from inside the machine 1.

After that, "glue two sheets of paper you want to use and set them in the laser printer.", CRT
It is displayed on the display device 3 (S39).

Further, "Have you loaded paper in the printer?" Is displayed on the CRT display device 3 (S40).
The user sets, on the laser printer 11, two sheets of the same paper set as the one set in S36, and YES.
If you touch the part on the touch panel 4 displayed as (S4
If YES, the automatic certificate issuing machine 1 starts to operate again as described above, and the laser printer 11 sends out the set of the above-mentioned two sheets of paper one by one (S41). The S
In 40, when the part on the touch panel 4 where NO is displayed is touched (NO in S40), the process proceeds to S39. The fed paper is output from the upper discharge port 11a of the laser printer 11, passes through the conveyance path 55,
In the same manner as described above, the photo sensor 82 receives only the amount of light emitted from the light emitting diode 81 that has passed through the double feed detection unit 80 and transmitted through two sheets of paper. The voltage value data received and photoelectrically converted by the photo sensor 82 is Vw1-1 to Vw1-m, Vw2-1 to Vw2-m, V.
It is stored in the HDD 17 as wn-1 to Vwn-m (S
42).

Thereafter, the paper passes through the transport path 57 and is continuously discharged onto the intermediate tray 60. When all the sheets are discharged in this way, they pass through the sheet discharge unit 53 and are discharged from the inside of the automatic certificate issuing machine 1 through the discharge port 7.

Further, the CPU 13 calculates the sum of the voltage values measured m times when each double-feed detection unit 80 has one sheet of paper. That is, Σ (Vs1) = Vs1−1 + Vs1−2 + ...
+ Vs1−m, similarly, Σ (Vs2) ... Σ (Vsm) is obtained. Next, the total of the measured voltages when two sheets of paper are stacked is calculated. That is, Σ (Vw1), Σ (Vw2) ... Σ (Vw
m) is calculated. Further, the paper 1 of each double feed detection unit 80
Add the measured total value when the number of sheets is one and the total value when two sheets of paper are overlaid, and halve the value m
The value divided by is the threshold value of the double feed detection unit, and for example, Vx1 = {Σ (Vs1) + Σ (Vw1)} /
(2 × m), Vx2 = {Σ (Vs2) + Σ (Vw2)} / (2
× m) ... Vxn = {Σ (Vsn) + Σ (Vwn)} / (2
Xm) is calculated (S43).

Then, "Do you want to register this paper?" Is displayed on the CRT display device 3 and it is determined whether or not the threshold value is stored (S44). When the YES item on the touch panel 4 is touched (YES in S44), "Please input the paper name" is displayed on the CRT display device 3 (S45), and when the user inputs the paper name (S46). Y
ES), the threshold values Vx1, Vx2, ..., Vxn for the double feed detection units 1, 2, ... N are stored in the HDD 17 together with the sheet name (S47). After that, the double feed detection level setting mode ends, and the process proceeds to S1 in FIG. If the user does not enter the paper name (S46
No), continue to display "Please enter the paper name" (S
45). If NO is selected in S44, S1
Processing shifts to.

In the step S43, the sheet is set to the transport path 1 in the mode set by the double feed detection level setting means.
With the result detected by the paper detection means in the state of conveying the sheets,
It functions as a calculating unit that calculates a threshold value for determining the double feeding of the sheets on the basis of the result detected by the sheet detecting unit in a state where the two sheets are conveyed in an overlapping manner. As is clear from the above description, the double-feeding sheet detection apparatus of this embodiment can detect double-feeding of various types of sheets without mechanical adjustment.

The present invention is not limited to the embodiments described in detail above, and various modifications can be made without departing from the spirit of the invention.

For example, in the present embodiment, the user stacks two sheets of paper he wishes to use and glues them on the laser printer 11. When the amount of transmitted light of one sheet of paper is measured, the certificate is automatically issued. It is also possible that the stapler 14 in the machine 1 automatically ejects the two stacked sheets from the outlet 7 and sets the sheets as they are in the laser printer 11. By doing so, it is possible to save the user the trouble of overlapping and pasting two sheets of paper.

Further, the present invention can be widely used for a printing apparatus, a copying machine, etc., which involves the conveyance of paper.

[0044]

As is apparent from the above description, according to the paper multi-feed detection device of the present invention, the mode for determining the multi-feed detection level of the paper that the user wants to use is set by the mode setting means. Set. Then, put the paper 1 in the transport path.
With the result detected by the paper detection means in the state of conveying the sheets,
Since the calculating unit calculates the threshold value for determining the double feeding of the sheets on the basis of the result detected by the sheet detecting unit in the state where the two sheets are stacked and conveyed on the conveying path, various types of sheets are used. Double feeds can be detected without mechanical adjustment.

Further, the paper detecting means is installed so as to face the conveying path and a light emitting means, and is arranged so as to face the light emitting means with the conveying path interposed therebetween, and light is emitted from the light emitting means. And a light receiving means for receiving light,
Since the sheet being conveyed is detected by the amount of transmitted light received by the light receiving means, it is possible to detect double feeding with a simple configuration.

Further, the calculating means sets the paper to 1 in the transport path.
The half value of the amount of transmitted light obtained by adding the amount of transmitted light detected by the sheet detecting means in the state of conveying the sheets and the amount of transmitted light detected by the sheet detecting means in the state of stacking two sheets is the value Since it is calculated as the threshold value, it is possible to obtain an effect such that double feeding can be detected accurately in correspondence with various sheets.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an automatic certificate issuing machine.

FIG. 2 is an external view of an automatic certificate issuing machine.

FIG. 3 is a block diagram showing an electrical configuration of an automatic certificate issuing machine.

FIG. 4 is a flowchart showing a flow of operations of an automatic certificate issuing machine.

FIG. 5 is a flowchart showing a procedure for setting a double-feed detection level for a sheet for setting a threshold value for determining a double-feed in the automatic certificate issuing machine.

[Explanation of symbols]

 1 Certificate Automatic Delivery Machine 3 CRT Display Device 4 Touch Panel 7 Ejection Port 11 Laser Printer 13 CPU 17 HDD 51 Paper Transport Unit 55 Transport Path 57 Transport Path 80 Double Feed Detection Unit 81 Light Emitting Diode 82 Photo Sensor

Claims (3)

[Claims] 1. A double-feed detection level setting means for setting a mode for determining a double-feed detection level of a sheet to be used, a sheet detection means for detecting a sheet conveyed on a conveyance path, and the double-feed detection. In the mode set by the level setting means, the result detected by the sheet detecting means in the state where one sheet is conveyed to the conveying path and the result detected by the sheet detecting means in the state where two sheets are conveyed in the conveying path in an overlapping manner And a calculation unit that calculates a threshold value for determining the double feeding of the sheet based on the result. 2. The paper detecting means is installed so as to face the conveying path and a light emitting means, and is arranged so as to face the light emitting means across the conveying path, and the light is emitted from the light emitting means. 2. The multi-feeding sheet detection device according to claim 1, wherein the multi-sheet feeding detection device is configured by a light receiving unit that receives light and detects the sheet being conveyed by the amount of transmitted light. 3. The calculating means detects the amount of transmitted light detected by the paper detecting means in the state where one sheet is conveyed to the conveying path, and the sheet detecting means in the state where two sheets are stacked on the conveying path. 2 of the amount of transmitted light that is obtained by adding the amount of transmitted light
The double-feed detection device for paper according to claim 1, wherein a value of one-half is set as the threshold value.