JPH07116607A - Paper sorting device, and method for sorting and stacking paper - Google Patents

Abstract

PURPOSE:To make a user of paper feel comfortable by erasing the bar codes printed on the papers before delivering them to the user. CONSTITUTION:A paper sorting device is provided with a paper supply part 101 which supplies one by one a plurality of papers with printed bar codes repersenting the sorting information added to the papers for classification thereof, a bar code reader 102 for recognizing the sorting information of the papers by reading the bar code on the paper supplied from the paper supply part 101 and a bar code erasing part 104 for erasing the bar code after reading by the bar code reader. The paper sorting device is further provided with a sorting control part 103 for sorting out the papers based on the result of recognition by the bar code reader 102 and a stacking part 105 for stacking the papers sorted out by the sorting control part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention converts the destination information written on a paper sheet into a bar code or the like, prints the bar code on the paper sheet, and reads the bar code. The present invention relates to a paper sheet sorting apparatus and a paper sheet sorting method for sorting and stacking paper sheets according to destination information indicated by a barcode.

[0002]

2. Description of the Related Art A conventional paper sheet sorting apparatus prints a bar code corresponding to the destination information written on the paper sheet on the paper sheet, and reads the bar code to obtain the destination information. recognize. Then, the paper sheets are classified and accumulated according to the recognized destination information. According to this paper sheet sorting apparatus, it is not necessary to optically recognize the destination information and the like every time the paper sheets are sorted, and the work efficiency is greatly improved. This conventional paper sheet sorting apparatus is disclosed in Japanese Patent Laid-Open No. 57-110379.

FIG. 1 shows this conventional paper sheet sorting apparatus.
This will be described with reference to FIG.

Sheets 108 that have not been sorted and collected even once are set in the supply unit 101. Then, the paper sheets 108 sent from the supply unit 101 to the conveyance path 109 are
The optical character recognizing unit 102 recognizes a postal code, an address, etc. (hereinafter referred to as destination information) written on the paper sheet 108 based on the image data obtained by scanning the paper sheet 108. To be done. Then, the barcode printing unit 103 converts the destination information recognized by the optical character recognition unit 102 into a barcode. The barcode is printed on the paper sheet 108. Then, only for the first sorting work, the gate controller 10 is operated according to the destination information recognized by the optical character recognition unit.
Control 5 The conveyance direction of the paper sheet 108 is branched by the gate 106 driven by the gate controller 105. Then, the paper sheets 108 are sorted and stacked in the stacking unit 107 corresponding to the destination information.

In the second and subsequent sorting operations, first,
The paper sheet 108 on which the barcode is printed set in the supply unit 101 is sent to the transport path 109. Transport path 10
The barcode printed on the paper sheets on 9 is read by the barcode reader, and the corresponding destination information is recognized. Then, based on the destination information recognized by the barcode reader, the paper sheets 108 are sorted and stacked in the stacking unit 107 corresponding to the destination information as described above. This process is repeated until the end of classification.

As described above, when the paper sheets are first sorted, the destination information recognized by the optical character recognition unit such as the OCR is converted into a bar code and printed on the paper sheets. When classifying the categories, the destination information is recognized only by reading the barcode on the paper sheet.

[0007]

In this conventional paper sheet sorting apparatus, the bar code is still printed on the paper sheet delivered to the user. Therefore, the user who delivered the paper sheet with the stains and the like left by the barcode was very uncomfortable.

Further, in order to solve the above problems, although it cannot be confirmed with the naked eye, by irradiating with ultraviolet light or the like,
There is also a method of realizing both improvement of work efficiency and prevention of deterioration of user's mental state by printing a recognizable bar code on a paper sheet.

However, according to this method, it is very difficult to confirm the print quality of the barcode during the work division, and therefore, the recognition error or the rejection is likely to occur due to the deterioration of the print quality of the barcode.

[0010]

In order to solve the above-mentioned problems, the paper sheet sorting apparatus of the present invention is a bar corresponding to sorting information added to a paper sheet for sorting the paper sheet. By reading the bar code on the paper sheet supplied from the paper sheet supply unit and the paper sheet supply unit that supplies a plurality of paper sheets on which codes are printed one by one, A bar code reader that recognizes the sorting information, a bar code erasing unit that erases the bar code after the bar code is read by the bar code reader, and the paper sheet based on the recognition result in the bar code reader. A control unit that controls sorting and a stacking unit that stacks the paper sheets sorted by the control unit are provided.

Then, the paper sheets on which the barcodes are printed are supplied one by one from the paper sheet supply unit. By reading the bar code printed on the supplied paper sheet with the bar code reader, the classification information of the paper sheet is recognized. Next, after the bar code is read, the bar code erasing unit erases the bar code. Finally, the paper sheets are sorted and collected in the stacking unit based on the sorting information recognized by the barcode reader.

Further, in order to solve the above-mentioned problems, the paper sheet sorting apparatus of the present invention includes a paper sheet supply unit for supplying a plurality of paper sheets to a conveying path one by one, and the paper sheet supply unit. A bar code reader that detects a bar code on a paper sheet supplied from a printer and recognizes the classification information added to the paper sheet by reading the bar code; and the bar code reader, When a code is not detected, an optical character recognition unit for recognizing the classification information of the paper sheet by optically recognizing the character pattern described on the paper sheet, and the optical character recognition. A bar code printing unit for converting the sorting information recognized in a unit into a corresponding bar code, and printing the bar code on the paper sheet; and the bar code after the bar code is read by the bar code reader. A bar code erasing section for erasing, a control section for classifying and controlling the paper sheet based on the classification information recognized by the bar code reader or the optical character recognition section, and the paper sheet classified by the control section. And a stacking unit for stacking.

In this paper sheet sorting apparatus,
Whether or not it is the final sorting work is set in the control unit, and the paper sheets are supplied one by one from the paper sheet supply unit. In this case, it does not matter whether the bar code is printed on the paper sheet. When a barcode is printed on the supplied paper sheet, the barcode is read by a barcode reader to recognize the sorting information of the paper sheet. Further, when the barcode is not printed on the paper sheet, the destination information written on the paper sheet is recognized by the optical character recognition unit. Here, in the case where the sorting work of this time is set in advance by the control unit as the final sorting work, the barcode already printed on the paper sheet is erased by the barcode erasing unit.
Further, when it is set that it is not the final sorting operation, the barcode corresponding to the destination information recognized by the optical character recognition section is printed on the sheet by the barcode printing section. Then, according to the destination information recognized by the barcode reader or the destination information recognized by the optical character recognition unit, the paper sheets are sorted and stacked in the stacking unit.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a block diagram showing the configuration of the first embodiment, and FIG. 2 is a block diagram for explaining the operation of the bar code erasing section.

As shown in FIG. 1, a plurality of paper sheets 108 on which a bar code is already printed are set in the supply unit 101. Then, the supply unit 101 feeds the paper sheets 108 to the conveyance path 109 one by one. Barcode reader 10
2 reads the barcode of the paper sheet 108 sent from the supply unit 101. Then, the destination information corresponding to the read barcode is recognized. This destination information indicates the postal code, address, etc. written on the paper sheet. Control unit 10
Step 3 determines whether or not this paper sheet sorting operation is the final sorting operation. This may be set in advance by the control unit 103 whether or not it is the final classification before the classification work.
Then, when it is the final sorting work, the control unit 103
Drives the bar code erasing unit 104. Further, the control unit 103 controls the gate controller 105 based on the destination information recognized by the barcode reader 102. Further, when it is not the final sorting work, the control unit 1
03 does not drive the bar code erasing unit 104,
The gate controller 105 is controlled based on the destination information recognized by the barcode reader 102. The barcode erasing unit 104 receives the drive signal output from the control unit 103 and erases the barcode on the paper sheet. The gate controller 105 drives a gate provided in each of the plurality of integrated units 107 based on a control signal output from the control unit 103. By driving this gate, the conveyance direction of the paper sheet 109 is branched. Therefore, the paper sheets 108 are sorted and stacked in the desired stacking unit 107 corresponding to the destination information recognized by the barcode reader 102.

Further, a configuration for driving the bar code erasing section 104 will be described. As shown in FIG. 2, the register 202 stores the print position information of the barcode on the paper sheet 108 read by the barcode reader 102. The direction changing unit 201, depending on which side of the paper sheet 108 the bar code read by the bar code reader 102 is printed on, may change the paper sheet 10 as necessary.
Reverse the direction of 8. When detecting the leading edge of the paper sheet 108 being conveyed, the paper sheet detection unit 203 outputs a detection signal to the delay circuit 204. The delay circuit 204 keeps the paper sheet detecting unit 20 for a predetermined time according to the conveyance speed of the paper sheet 108.
3 delays the detection signal output from the drive control unit 20.
Output to 5. That is, the delay circuit 204 controls the paper sheet 10.
After the sheet 8 passes through the sheet detection unit 203, the sheet detection unit 2 is moved for the time to move to the position of the barcode erasing unit 104.
The detection signal output from 03 is delayed. Drive controller 2
Reference numeral 05 reads the print position information stored in the register 202 at the timing of receiving the signal from the delay circuit 204. Further, the drive control unit 205, based on the print position information read from the register 202 and the timing at which the signal output from the delay circuit 204 is received, the paper sheet 1
The position where the bar code 08 is printed is accurately detected. Then, the barcode erasing unit 104 is driven so as to erase the detected barcode.

Next, the operation of the first embodiment will be described with reference to FIGS.

FIG. 3 is a flow chart for explaining the operation procedure of the first embodiment. First, it is set in advance in the control unit 103 whether or not the sorting work of this time is the final one (S301). Here, the final sorting refers to the case where the paper sheets finally sorted by this sorting work are delivered to the user. Then, the paper sheet 108 on which the barcode corresponding to the destination information such as the postal code and the address is printed in advance is set in the supply unit 101. Then, the paper sheet 108 is sent from the supply unit 101 to the transport path 109 one by one (S302). The barcode printed on the paper 108 being conveyed is read by the barcode reader 102, and the destination information corresponding to the read barcode is recognized (S30).
3). Further, the control unit 103 determines whether or not the sorting work of the paper sheets 108 is final (S304).

Here, when the control unit 103 determines that it is not the final division, the bar code reader 102
The paper sheets 108 are sorted and stacked in the desired stacking unit 107 based on the destination information recognized in (S306).

When the control section 103 determines that the sheet is the final section, the bar code erasing section 104 erases the bar code on the paper sheet 108 (S3).
05). Further, based on the destination information recognized by the barcode reader 102, the paper sheets 108 are sorted and stacked in the desired stacking unit 107 (S306).

In this way, after the final classification is completed, for the paper sheets which are only delivered to the user, the bar code is delivered before the paper sheets are delivered. Erased. Therefore, since the bar code is not printed on the paper sheet delivered to the user, it does not make the user's mind worse. Furthermore, in the end, in order to erase the barcode on the paper sheet, during sorting work,
The barcode may be visible to the naked eye. As described above, if the presence of the barcode can be visually confirmed during the sorting operation, the printing quality of the barcode can be easily confirmed. Then, the efficiency and accuracy of the sorting work can be significantly improved.

In this embodiment, the paper sheet sorting apparatus for sorting the paper sheets having the bar code printed in advance has been described. Here, a paper sheet sorting apparatus including a means for printing a barcode on a paper sheet will also be briefly described with reference to FIG.

A paper sheet 10 on which a bar code is not printed
8 is set in the supply unit 101. Then, the supply unit 101
The paper sheets 108 are sent to the transport path 109 one by one.
The optical character recognition unit 401 recognizes the destination information described on the paper sheet 108 based on the image data obtained by scanning the paper sheet 108 being conveyed. In the barcode printing unit 402, the optical character recognition unit 40
The recognition result in 1 is converted into a barcode corresponding to the recognition result, and the barcode is printed on the paper sheet 108. Furthermore, the gate controller 105 is controlled based on the recognition result in the optical character recognition unit 401, and the paper sheets 108 are sorted and stacked in a desired stacking unit 107.

As a result, the bar code corresponding to the destination information is printed on all the paper sheets 108 sorted and collected in the stacking unit 107. As will be described in detail later, in the barcode printing unit 402, a barcode that can be erased by the barcode erasing unit 104 shown in FIG. 1 is printed on the paper sheet 108.

Next, a second embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. FIG. 5 is a block diagram showing the configuration of the second embodiment, but the configuration of the second embodiment other than the control unit 501 is the same as the configuration already shown in FIGS. 1 and 4. Therefore, the description of the overlapping portion is omitted.

The control unit 501 controls the bar code reader 102 when the bar code is printed on the paper sheet 108.
The gate controller 105 is controlled according to the destination information recognized in. If the bar code is not printed on the paper sheet 108, the gate controller 10 is operated according to the destination information recognized by the optical character recognition unit 401.
Control 5 Further, when the final sorting work is being performed, the bar code erasing unit 104 is driven.

Next, a method of sorting paper sheets using the paper sheet sorting apparatus of the second embodiment will be described with reference to FIGS. 5 and 6.

FIG. 6 is a flow chart for explaining the operation procedure of the second embodiment. First, it is set in advance in the control section 501 whether or not the sorting work of this time is the final one (S601). Then, the plurality of paper sheets 108 to be classified
Is set in the supply unit 101. Here, it does not matter whether the bar code is printed on the paper sheet 108 set in the supply unit 101. Further, it is possible that the paper sheets on which the bar code is printed and the paper sheets on which the bar code is not printed are mixed. Then, the paper sheets 108 set in the supply unit 101 are supplied to the transport path 109 one by one (S602). The bar code reader 102 determines whether or not a bar code is printed on the paper sheet 108 being conveyed (S603).

When the bar code is printed on the paper 108, the bar code is read by the bar code reader 102 and the destination information corresponding to the bar code is recognized (S606). Further, the control unit 501 determines whether or not this sorting work is final (S605). If it is determined that the work is not the final sorting work, the sheets are sorted and collected according to the destination information recognized by the barcode reader 102 (S61).
0). In this case, since the sorting work is performed again on the paper sheets 108 sorted and stacked in the stacking unit 107, the barcodes are still printed. If it is determined that the sorting work is the final sorting work, the barcode erasing unit 104 erases the barcode on the paper sheet 108 (S606). Further, the sheets are sorted and accumulated according to the destination information recognized by the barcode reader 102 (S
610). In this case, no barcode remains on the paper sheets 108 sorted and collected in the stacking unit 107.

If it is determined in S603 that the bar code is not printed on the paper sheet 108, the optical character recognizing unit 401 recognizes the characters written on the paper sheet, and thereby the destination information is obtained. Is recognized (S607).
Further, the control unit 501 determines whether or not this sorting work is final (S608). Here, when it is determined that the final sorting operation is performed, the sheets are sorted and stacked in the stacking unit 107 according to the destination information recognized by the optical character recognition unit 401 (S610).
In this case, the paper sheets 1 sorted and collected in the stacking unit 107
No bar code is printed on 08. If the control unit 501 determines that the sorting work is not the final sorting work, the barcode printing unit 503 prints a barcode on the sheet (S609). Further, the paper sheets are sorted and collected in the stacking unit 107 according to the destination information recognized by the optical character recognition unit 401 (S610). In this case, the paper sheets 10 sorted and collected in the stacking unit 107
A bar code is printed on 8.

Here, in S605 and S608, the control unit 501 determines whether or not the sorting work is final. This determination is the same for all the paper sheets 108 set in the supply unit 101. Supply unit 1
No different judgment is made for each paper sheet sent from 01. For example, if the paper sheets are only delivered to the user after the sorting work, the paper sheet sorting work at this time is set in advance as the final sorting. That is, the paper sheets 1 that are sorted and collected in the stacking unit 107 in S610.
In the case of 08, for example, in the case of the final sorting work, the bar code is not printed. If it is not the final sorting operation, the bar codes are printed on all the paper sheets 108.

In each of the above embodiments, an example in which the bar code printing section and the bar code erasing section are controlled according to whether or not the final classification has been described has been described. However, the bar code is supplied for each sheet fed. It is also possible to determine whether the paper sheet is allowed to remain or the paper sheet for which the barcode should be erased, and to control the barcode printing section and the barcode erasing section according to the determination result.

Next, specific configurations of the bar code printing section 402 and the bar code erasing section 104 in each of the above embodiments will be described with reference to FIGS. 7 to 13.

FIG. 7 is a sectional view showing the construction of an embodiment of the bar code printing section, and FIG. 8 is a sectional view taken along line XX in FIG.

As shown in FIG. 7, the bar code printing section 40
2 is a platen roller 7 that supports the paper sheets 108 being conveyed.
01, and a printer head 702 that taps a portion of the paper sheet 108 supported by the platen roller 701 via a ribbon tape 704. Ribbon tape 70
4 is provided in the ribbon cartridge 703, and 2
With one roller, it shifts each time it is used. The ribbon tape 704 is shown in FIG.
As shown in FIG. 7, the printer head 702 side has a double structure, and the base portion 705 is added to the printer head 702 side, and the weakly viscous ink 706 is added to the paper sheet 108 side.

Then, the base portion 705 of the ribbon tape 704 is connected to the printer head 804 in the same manner as lettering.
Then, the ink 706 is struck by hitting the paper sheet 108.
Transfer to. Here, with regard to the barcode printing method, the control timing of the printer head 804, and the like, well-known means may be used, and thus detailed description thereof will be omitted.

Next, the bar code erasing unit 104 for erasing the bar code printed on the sheet by the bar code printing unit 402 shown in FIGS. 7 and 8 is shown in FIGS.
This will be described with reference to 0.

FIG. 9 is a sectional view showing the construction of an embodiment of the bar code erasing section, and FIG.
FIG.

As shown in FIG. 9, the bar code erasing unit 10
4 is a platen roller 7 that supports the paper sheet 108 being conveyed.
01 and a pusher roller 901 that presses a portion of the paper sheet 108 supported by the platen roller 701 via the ribbon tape 902. Ribbon tape 9
02 is provided in the ribbon cartridge 703,
It is designed so that it shifts each time it is used by two rollers. Then, as shown in FIG. 10, the ribbon tape 902 has a double structure, and the pusher roller 901 side is the base portion 112 and the paper sheet 108 side is
A substance 903 having strong adhesiveness is added.

Then, when the bar code printed portion on the paper sheet 108 is conveyed to the portion supported by the platen roller 701, the pusher roller 901 is driven. The pusher roller 901 holds down the base portion of the ribbon tape 902, so that the highly adhesive portion of the ribbon tape 902 is pressed against the barcode printed portion. Since the barcode is printed with weakly viscous ink 706,
The ink 706 is peeled off by the strong viscous substance 903. In this way, the barcode on the paper sheet 108 can be erased.

Next, another specific example of the bar code printing section 402 and the bar code erasing section 104 will be described with reference to FIG.

FIG. 11 is a perspective view showing the construction of another embodiment of the bar code printing section, which is a bar code printing section 402.
Includes an ink jet type blowing unit 111. Then, the ink used for the fountain pen or the like is blown from the blowing portion 111 to print the barcode on the paper sheet 108.

Further, FIG. 11 shows the construction of the bar code erasing section 104 for erasing the bar code printed by the bar code printing section 402. The bar code erasing section 104 also has an ink jet type ejection section 121. Prepare Then, the bar code is erased by blowing a chlorine-based solution called ink erasing from the blowing section 121 onto the bar code printed portion on the paper sheet 108.

Although the ink jet type blowing means is used for both the bar code printing section 402 and the bar code erasing section 104, a bubble jet type blowing means may be used.

In the bar code erasing unit 104, the chlorine-based solution is sprayed onto the paper sheet 108 from the blowing unit 121, but the present invention is not limited to this example. For example, a means for applying a chlorine-based ink to the bar code printed portion on the paper sheet 108 may be used.

Next, another specific example of the bar code printing section 402 and the bar code erasing section 104 will be described with reference to FIGS.
2 and FIG. 13 will be described.

FIG. 11 is a perspective view showing the structure of the bar code printing unit 402, and the structure thereof has already been described, and will be omitted. In this specific example, the ink ejected from the ejection unit 121 onto the paper sheet 108 is reflected at a wavelength in the visible region. That is, it can be seen by the human eye. Further, when irradiated with ultraviolet light, the ink is excited and emits light. Further, the ink can be erased by applying heat to the ink. A bar code is printed on the paper sheet 108 by spraying the ink having such characteristics from the blowing section 121.

FIG. 12 is a block diagram showing a configuration of the bar code erasing unit 104 for erasing the bar code printed by the bar code printing unit 402, and FIG. 13 is a sectional view taken along line ZZ in FIG. . Then, the barcode erasing unit 104 includes the platen roller 701 that supports the paper sheet 108 being conveyed, and the heater 122 inside the heat insulating case 123.
Heater roller 12 which is kept at a predetermined temperature by
1 and. Then, the paper sheets 108 passing between the heater roller 121 and the platen roller 701 are heated by the heater roller 121. Therefore, the bar code printed on the paper sheet 108 is erased by applying heat.

The bar code printing section 402 and the bar code erasing section 104 are applicable to both the first embodiment and the second embodiment described above.

[0051]

As described above, in the paper sheet sorting apparatus of the present invention, the bar code printed on the paper sheets is erased before being delivered to the user, and therefore, it can be used. This has the effect of improving the person's image and not giving discomfort to the recipient.

Further, since the bar code on the paper sheet can be printed by using a substance which can be visually confirmed, the printing quality of the bar code can be confirmed. As a result, the efficiency and accuracy of the sorting work can be greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a block diagram illustrating an operation of a bar code erasing unit in FIG.

FIG. 3 is a flowchart showing a procedure of a method of sorting and accumulating paper sheets according to the first embodiment.

FIG. 4 is a block diagram showing a configuration of a paper sheet sorting apparatus including a barcode printing unit.

FIG. 5 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 6 is a flowchart showing a procedure of a method for sorting and accumulating paper sheets according to the second embodiment.

FIG. 7 is a sectional view showing an outline of an embodiment of a bar code printing unit.

8 is a cross-sectional view taken along line XX in FIG.

9 is a cross-sectional view showing a bar code erasing unit that erases the bar code printed by the bar code printing unit shown in FIG.

10 is a sectional view taken along line YY in FIG.

FIG. 11 is a perspective view showing the outline of another embodiment of the barcode printing unit or the outline of another embodiment of the barcode erasing unit.

FIG. 12 is a sectional view showing the outline of still another embodiment of the bar code erasing unit.

13 is a sectional view taken along line ZZ of FIG.

FIG. 14 is a block diagram showing an outline of a conventional paper sheet sorting apparatus.

[Explanation of symbols]

 101 Paper Sheet Supply Section 102 Bar Code Reader 103 Control Section 104 Bar Code Erasing Section 105 Gate Controller 106 Gate 107 Stacking Section 108 Paper Sheet 109 Conveying Path 401 Optical Character Recognition Section 402 Bar Code Printing Section 501 Control Section 701 Platen Roller 702 Printer head 704 Ribbon tape 705 Base portion 706 Ink 901 Pusher roller 902 Ribbon tape 903 Highly viscous substance 111 Blowing portion 121 Heater roller 122 Heater 123 Insulation case

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunio Hiromori 1-1-1, Shinurashima-cho, Kanagawa-ku, Yokohama, Kanagawa Prefecture NEC Robot Engineering Co., Ltd. (72) Inventor Ri Kubota Kanagawa-ku, Yokohama, Kanagawa 1-chome, Shin-Urashima-cho 25 NEC Electric Robot Engineering Co., Ltd.

Claims (7)

[Claims] 1. A paper sheet supply unit for supplying, one by one, a plurality of paper sheets on which a bar code corresponding to classification information for classifying the paper sheets added to the paper sheets is printed. By reading the barcode on the paper sheet supplied from the paper sheet supply unit, a barcode reader that recognizes the sorting information of the paper sheet, and after the barcode is read by the barcode reader,
A bar code erasing unit that erases the bar code, a control unit that classifies and controls the paper sheets based on a recognition result in the bar code reader, and a stacking unit that stacks the paper sheets that are sorted by the control unit. A paper sheet sorting apparatus comprising: 2. A bar code is printed on the paper sheet using a weakly sticky ink, and the bar code erasing section is provided with a strong sticky substance on the part where the bar code is printed. By pressing
The paper sheet sorting apparatus according to claim 1, further comprising means for removing the weakly adhesive ink. 3. A bar code is printed on the paper sheet by an ink that can be erased by reacting with a chlorine-based solution, and the bar code erasing section is provided on a portion where the bar code is printed. The paper sheet sorting apparatus according to claim 1, further comprising a unit for spraying a chlorine-based solution. 4. A bar code is printed on the paper sheet with an ink that reflects at a wavelength in the visible region and is erasable by heating, and the bar code erasing unit prints the bar code. The paper sheet sorting apparatus according to claim 1, further comprising means for applying heat to the portion. 5. A paper sheet supply unit for supplying a plurality of paper sheets to a conveyance path one by one, and a bar code on the paper sheet supplied from the paper sheet supply unit is detected and the bar thereof is detected. A bar code reader that recognizes the classification information added to the paper sheet by reading a code, and a character written on the paper sheet when the bar code is not detected in the bar code reader. By optically recognizing a pattern by an optical character, an optical character recognition unit that recognizes the classification information of the paper sheet, and the classification information recognized by the optical character recognition unit is converted into a corresponding barcode, and the barcode A bar code printing unit for printing on the paper sheet, and after the bar code is read by the bar code reader,
A barcode erasing unit that erases the barcode, a control unit that controls the sorting of the paper sheets based on the sorting information recognized by the barcode reader or the optical character recognizing unit, and the sorting unit A paper sheet sorting apparatus, comprising: a stacking unit that stacks the paper sheets. 6. A first step of supplying a plurality of paper sheets one by one, and recognizing the sorting information of the paper sheets by reading a bar code printed on the supplied paper sheets. And a third step of erasing the barcode after the barcode is read in the second step, and the paper sheet based on the sorting information recognized in the second step. A method of classifying and accumulating paper sheets, comprising: a fourth step of classifying and classifying the paper sheets; and a fifth step of accumulating the classified paper sheets. 7. A first step of presetting whether or not it is a final sorting operation, a second step of supplying a plurality of paper sheets one by one, and printing on the supplied paper sheets. The third step of recognizing the sorting information of the paper sheet by reading the barcode that is printed, and when the barcode is not printed on the paper sheet,
The fourth step of recognizing the destination information written on the paper sheet by the optical character recognition means and the bar already printed on the paper sheet when the final sorting operation is set in advance. A fifth step of erasing the code, and a fifth step of printing a bar code corresponding to the destination information recognized by the optical character recognizing means on the paper sheet when it is set not to be the final sorting operation. 6 and the sixth step of classifying the paper sheet according to the destination information recognized by reading the barcode or the destination information recognized by the optical character recognition means. A method for collecting paper sheets.