Abstract:
A sheet handling apparatus is presented that includes a first module arranged along a sheet conveyance route from the upstream to the downstream thereof, and a second module arranged adjacent to the first module. The first module includes a first control part to transmit destination information and category information of discriminated sheets and to execute conveyance control to the sheet residing along the first conveyance route. The second module includes a second control part to execute conveyance control to the sheets residing along the second conveyance route, and to transmit information of the number of sheets in each category stacked in the first stacking device. The first control part is configured to execute a cross-check to determine whether the information of the number of sheets in each category received from the second control part matches the information of the number of sheets transmitted to the second control part.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2009-041113, filed on Feb. 24, 2009, the entire contents of all of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     The present invention relates to an apparatus and a method to handle sheets such as securities. Particularly, the present invention relates to a sheet handling apparatus accompanying a long conveyance route to execute conveyance control of sheet by multiple CPUs (Central Processing Unit) and the handling method. 
     BACKGROUND 
     The sheet handling apparatus which handles sheets, such as negotiable securities, takes out those sheets one by one from a bundle of multiple sheets, for example, one thousand sheets using a sheet take-out device, sends out the sheets to the conveyance route and conveys the sheets at a predetermined pitch. Then the sheet handling apparatus discriminates kinds of conveyed sheets, for example the classification of negotiable securities and quality state, for example discrimination of genuine sheet, mutilated sheet, rejectable sheet, etc., are discriminated with a discriminating device, and appoints destination for every classification and for every quality. 
     Based on the discrimination result of sheets, the conveyance control part makes the sheets to be conveyed to their appointed destinations by controlling sorting gates arranged along the conveyance route. The conveyed sheets are stacked in the stacking devices provided to the terminations of individual branch conveyance routes. An impeller type stacking device is used for the stacking device as a measure of stacking, while absorbing the bearer rate of the sheets conveyed at high speed. 
     The stacking device stacks those sheets taken in from the conveyance route in a temporary storage. When an amount of the stacked sheets reaches predetermined number of sheets, for example, one hundred sheets, they are tied up in a one hundred sheets bundle with a banding band, such as a wrapper band. 
     Multiple sheets reside simultaneously on the conveyance route, and they are conveyed at a high speed. A destination information set up by the discrimination result obtained by the above-described discriminating device for every sheet is transmitted to a control part, by being continuously shifted during the conveyance of the sheets. That is, in each passing a sensor or a so-called shift-sensor arranged along a conveyance route, the destination information as attributes of the sheets is also transmitted to the control part in accompanying the conveyance of the sheets. As a result, when a sheet is detected by sensor, the destination information which is the attribute of sheets is discriminated. The sheet is then conveyed to the above-described stacking device based on the destination information in every time that the sorting gate is driven. 
     As is clear from the above description, the sheets are stacked in a last stacking device, by at least the destination information of the sheet is transmitted in the form of shift processing. As described above, since multiple sheets are conveyed along the conveyance route at a high speed and thus the control of the destination information of the sheets is required immediacy, the destination information of the sheets has been conventionally controlled by a single CPU. In order to fill the demand of immediacy, a technique to control only a required minimum control item in the form of shift processing has been used. 
     On the other hand, in order to respond to diversification of the kind of sheets to be handled, a necessity of executing the shift processing control operation by distributing to multiple CPUs has arisen, and then a measure for the distributing execution has been also been examined. However, only the destination information has been conventionally subjected for the shift processing control operation. Meanwhile, as disclosed in the Japanese Patent Application Publication No. 6-162324, there is known a money receiving and disbursing apparatus which memorizes a quantity of some denomination bills stacked in some bill storage on a conveyance route. 
     In the prior art apparatus, a sorting gate arranged on an upstream in the conveyance direction of the stacking devices are sorted with destination information using a shift style manner. Thereby, the apparatus does not require bill denomination information of each sheet (money). Therefore, even if a malfunction that a sheet discriminated as a first classification is stacked in a stacking device to stack a second classification, while another sheet discriminated as the second classification is stacked in the stacking device to stack the first classification (so-called “interfusion of each other”) has occurred, there is a problem that the malfunction is overlooked. 
     Furthermore, since the sensing operations of the sensors requires immediacy, it has been configured that the sensing operations of the sensors has been controlled in the form of shift processing with a single CPU. However, in accompanying a growing of the sheet handling apparatus in size, a number of sensors also increase. As a result, the single CPU has failed to complete controls over multiple sensors. Therefore, the shift processing control operation has become to be executed by distributing with multiple CPUs. 
     Conventionally, in case of executing the shift processing control operation with multiple CPUs, only the information of the last destination of the sheets was made as an attribute of the sheets. Therefore, the information of the stacking device that is capable of controlling and then storing the sheets residing on the conveyance route is only a number of sheets. Therefore, even if disagreement occurred between a number of sheets fed into the apparatus (number of fed sheets) and a number of sheets stacked in the stacking device (number of stacked sheets), there was a problem that look-back reviews of the number of stacked sheets for each classification could not executed. 
     Furthermore, since the stacking device can not execute controlling and then storing the information regarding classification of the sheets (bills), it was impossible to know the classification of frequently handled bills at a maintenance service. Therefore, there was a problem that an optimal maintenance service corresponding to the frequently handled classification could not be executed. 
     Furthermore, since a final machine inspection of the number of sheets upon termination of the sheet handling operation is made with only the number of stacked sheets, classification information can not be utilized for the inspection of the number of sheets. 
     Meanwhile, since the money processor disclosed in the Japanese Patent Application Publication No. 6-162324 fails to have a function of processing the classification information in the form of shift operation, the processor has a drawback that it is impossible to be adapted for a large equipment which comprises multiple conveyance routes. 
     SUMMARY 
     An object of the present invention is to provide a sheet handling apparatus and a sheet handling method which is able to recognize occurrence of malfunction. 
     An aspect of the present disclosure relates to sheet handling apparatus comprising: a first module arranged along a sheet conveyance route from the upstream to the downstream thereof, and a second module arranged adjacent to the first module, wherein the first module including: a take-out part to take out sheets one by one from sheet bundle fed into a supply part; a first conveyance route to convey the taken out sheets with the take-out part; a discriminating device to discriminate classification of the sheets conveyed along the first conveyance route; and a first control part to transmit destination information and classification information of the sheet discriminated by the discriminating device and to execute a conveyance control to the sheet residing along the first conveyance route, and wherein the second module including: a second conveyance route to convey further the sheets conveyed from the first module; a first stacking device to stack the sheet conveyed along the second conveyance route based on the destination information and classification information received from the first module in each classification; and a second control part to execute a conveyance control to the sheet residing along the second conveyance route, and to transmit information of the number of sheets in each classification stacked in the first stacking device, wherein the first control part is configured to execute a cross-check whether the information of the number of sheets in each classification received from the second control part matches with the destination information and the information of the number of sheets transmitted to the second control part or not. 
     Another aspect of the present disclosure relates to a sheet handling method in the sheet handling apparatus comprising a first module arranged along a sheet conveyance route from the upstream to the downstream thereof, and a second module arranged adjacent to the first module, comprises: taking out sheets one by one from sheet bundle fed to s supply part in the first module sending out the taken-out sheets and conveying the sheets along a first conveyance route; discriminating the classification of the sheet being conveyed; transmitting information of the discriminated classification of the sheet to the second module and then controlling the conveyance of the sheet along the first conveyance route; conveying further the sheet conveyed from the first conveyance route along a second conveyance route in the second module; stacking the sheet conveyed among the second conveyance route in each classification based on the classification information transmitted from the first module controlling the conveyance of the sheet along the second conveyance route, and transmitting information of the number of stacked sheets in each classification to the first module; and executing a cross-check whether the information of the number of sheets in each classification received from the second control part matches with the information of the number of sheets transmitted to the second control part or not. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram showing the sheet handling apparatus according to the present invention for executing shift processing to the classification information by multiple CPUs; 
         FIG. 2  is a block diagram illustrating the shift processing control operation by multiple CPUs in one embodiment of the present invention; 
         FIG. 3  is a flow chart illustrating an operation of the first module constituting the sheet handling apparatus of the present invention; 
         FIG. 4  is a flow chart illustrating an operation of the discriminating device  6  provided in the first module constituting the sheet handling apparatus of the present invention; and 
         FIG. 5  is a flow chart illustrating a conveyance operation of the second module constituting the sheet handling apparatus of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     Hereafter, an embodiment of the present invention will be described with reference to the attached drawings,  FIGS. 1 to 5 . 
       FIG. 1  is a schematic diagram of the sheet handling apparatus  100  for executing shift processing to the classification information by multiple CPUs according to the present invention. 
     The sheet handling apparatus  100  sequentially takes out a current uppermost sheet P one by one from sheet bundle input therein in block, for example, a bundle of one thousand sheets, and then conveys them into a discriminating device  6 . The sheets are then discriminated their classification in the discriminating devise  6 . The sheet handling apparatus  100  sort the sheets based on the discrimination result and then executes operations such as stacking, banding, etc. 
     In this embodiment, a case of that the sheet handling apparatus  100  is constituted by three modules M 1  to M 3  will be described. 
     In this embodiment, conveyance monitoring area is also partitioned to three sections in conformity with the number of modules, for manufacturing and fabrication of the apparatus easy. In this embodiment, although the number of modules constituting the sheet handling apparatus and the number of the conveyance monitoring areas are made equal, the number of modules and the number of the conveyance monitoring area are not necessarily be equal according to the size of the sheet handling apparatus. That is, the sheet handling apparatus may be so constituted that two conveyance monitoring areas are assigned to one module. Or the sheet handling apparatus may be so constituted that two modules are assigned to one conveyance monitoring area. That is, although the size of conveyance monitoring area depends on the processing speed of CPU, the size of module is decided depending on provisions in manufacturing and fabrication. In this embodiment, a case of that the number of conveyance monitoring areas and the number of modules are equal to each other, for convenience of explanation. 
     The first module M 1  is constituted by supply part  1 , take-out rotor (take-out part)  2 , conveyance route  3 , discriminating device  6 , rejectable sheet stacking device  16 , multiple sensor PC 11  to PC 15  (first sensors), and sorting gate G 11 . These structural elements are controlled by first module control CPU  10 . 
     A bundle of sheets, for example, a bundle of one thousand sheets Ps fed to the supply part  1  are loaded on the backup plate  1 A. The backup plate  1 A is driven with a drive motor (not shown), and raised until the uppermost end of the bundle of the sheets Ps on the backup plate  1 A comes to the sheet take-out position of the take-out position of the take-out rotor  2 . 
     When a sheet P residing at the uppermost end of the bundle is raised to the take-out position, the sheet P at the uppermost end of the bundle is detected, and the sheets P coming up to uppermost end of the bundle Ps one after the other in every time that the take-out roller  2  goes into 360-degree roll are sequentially sent out one by one to the conveyance route  3 . Therefore, the taken-out sheets P are sent out to the conveyance route  3  at about regular intervals. Meanwhile, the position of the backup plate  1 A is controlled by the drive motor of the backup plate  1 A so as that the uppermost end sheet P comes to the take-out position. 
     The sheet P taken out by the take-out rotor  2  is detected the classification and the quality such as physical property, shape, damage, etc. of the sheet P are discriminated by the discriminating device  6 . As a result of this discrimination, they are sorted to normal sheets (genuine sheets), defect sheets (mutilated sheets), and sheets impossible to classification discrimination and quality discrimination (rejectable sheets). 
     As a result of this discrimination, the sheets impossible to classification discrimination and quality discrimination (rejectable sheets) are stacked in the rejectable sheet stacking device  16 . 
     The second module M 2  is constituted by the sorting gates G 21  and G 22  destinations of the sheets based on the discrimination result obtained by the discriminating device  6 , and stacking/banding devices for executing stacking and banding to the sheets sorted by the sorting gates G 21  and G 22 . In this embodiment, the stacking/banding devices  21  and  22  stack therein the sheets discriminated as genuine ones of the first classifications. 
     Along the conveyance route in the second module M 2 , multiple sensors PC 21  to PC 25  (second sensors) monitoring sheets conveyed in the second module M 2 . 
     As a result of discrimination by the discriminating device  6 , the sheets P discriminated as genuine sheets or mutilated sheets by the sorting gate G 11  are sorted to left-hand side. While the sheets P discriminated as sheets impossible to classification discrimination and quality discrimination (rejectable sheets) are sorted to right-hand side. 
     In case of that the sheet P sorted by the sorting gate G 11  is a genuine one of the first classification, they are conveyed further to the stacking/banding device  21  by the sorting gate G 21 . The sheets P conveyed to the stacking/banding device  21  are stacked in a temporary storage of the stacking/banding device  21 . When the number of the stacked sheets P reaches one hundred, they are moved to a banding device and banded therein. Then a bundle of one hundred genuine sheets is formed. 
     When the number of the sheets stacked in the temporary storage of the stacking/banding device  21  reaches one hundred, sorting gate G 22  is driven to sort sheets conveyed following the former one hundred sheets to stacking/banding device  22  if the following sheets are genuine ones of the first classifications. Like this, during the genuine ones of the first classifications are being stacked in the temporary storage of stacking/banding device  22 , the sheets of one hundred sheets already stacked in the temporary storage of stacking/banding device  21  are banded by the banding device of stacking/banding device  21  as described above. Then a bundle of one hundred sheets is formed by the banding device. 
     When the number of the sheets stacked in the temporary storage of stacking/banding device  22  reaches one hundred, still further sheets conveyed following the sheets already stacked in the stacking/banding device  22  are stacked in the temporary storage of the other stacking/banding device  21 . Then a bundle of one hundred sheets is formed by the banding device of the stacking/banding device  21 . 
     In case of that sheets are discriminated as the second classification ones by the discriminating device  6 , sheet handling the same as that executed by stacking/banding devices  21  and  22  are executed by stacking/banding devices  31  and  32  in module M 3 . 
     The module M 3  is provided with stacking/banding devices  31  and  32  for stacking sheets discriminated as second classifications by the discriminating device  6 . Furthermore, the module M 3  is provided with sorting gate G 31  and G 32  assigned to the stacking/banding devices  31  and  32  for stacking the second classifications, and sensors PC 31  to PC 36 . 
     Sheets discriminated as mutilated sheets (nonnegotiable sheets) by the discriminating device  6  is conveyed to cutting device  34 . 
     In the cutting device  34 , first cutter blade  34 A in which multiple discoidal cutting blades are mounted to a rotating shaft and second cutter blade  34 B having a constitution the same as that of the first cutter blade  34 A are provided in a nested state with each other. The first and second cutter blades  34 A and  34 B rotate in keeping contact with each other, and cut mutilated sheets conveyed thereto. 
       FIG. 2  is a block diagram illustrating the shift processing control operation by multiple CPUs in one embodiment of the present invention. 
     The first module M 1  is provided with discrimination CPU  6 A which constitutes first module control CPU  10  for controlling the whole of the first module M 1  and discrimination CPU  6 A. The first module control CPU  10  and the discrimination CPU  6 A are connected to LAN (Local Area Network)  50 . 
     To the first module control CPU  10 , the supply part  1 , the sensors PC 11  to PC 15 , the sorting gate G 11 , and a conveying motor (not shown) are connected. Thereby those elements are controlled by the first module control CPU  10 . 
     The second module M 2  is provided with second module control CPU  20  for controlling the whole of the second module M 2 . The second module control CPU  20  is then connected to the LAN  50 . 
     To the second module control CPU  20 , the stacking/banding devices  21  and  22 , the sensors PC 21  to PC 25 , the sorting gates G 21  and G 22 , and a conveying motor (not shown) are connected. Thereby those elements are controlled by the second module control CPU  20 . 
     The third module M 3  is provided with third module control CPU  30  for controlling the whole of the third module M 3 . The third module control CPU  30  is then connected to the LAN  50 . 
     To the third module control CPU  30 , the stacking/banding devices  31  and  32 , the sensors PC 31  to PC 36 , the sorting gates G 31  and G 32 , a conveying motor (not shown), and the cutting device  34  are connected. Thereby those elements are controlled by the third module control CPU  30 . 
     As described above, the first module control CPU  10 , the second module control CPU  20 , the third module control CPU  30 , and the discrimination CPU  6 A are mutually connected by the LAN  50 . 
     The second module control CPU  20  and the third module control CPU  30  are connected further to maintenance service CPU  120  via USB interface. According to this connection, stacking information stored in the second module control CPU  20  and the third module control CPU  30  can be called up. 
     Herein now, conveyance control operation for the sheet P by sensors according to the present embodiment will be described. 
     A bundle of one thousand sheets Ps is loaded in block on the backup plate  1 A of the supply part  1 , and taken-out of the sheets in the block is started. At the start of sheet taking-out operation, the backup plate  1 A goes up. Then the sheets P are taken out one by one from the take-out rotor  2  and sent out to the conveyance route  3 . The sheet P sent out to the conveyance route  3  is conveyed by the above-described manner, and discriminated by the discriminating device  6 . Until the sheets P are sorted and then stacked and further a bundle of one hundred sheets is formed, the operations are as noted above. Now, one example of the conveyance operation of the sheet handling apparatus  100  constituted as described above will be described in reference to  FIGS. 3 and 4 . 
       FIG. 3  is a flow chart illustrating actions executed in the first module M 1  constituting the sheet handling apparatus  100 . When the sheet P is sent out to the conveyance line  3  by the take-out rotor  2 , the sheet P is detected by sensor PC 11  (ACT 1 ). The detected sheet P is discriminated by the discriminating device  6 . Then a time interval “T 11  ·12” until it reaches sensor PC 12  from sensor PC 11  is measured (ACT 2 ). This time interval “T 11 ·12” means the time that the sheet P passes the space between the sensors PC 11  and PC 12 . 
     Therefore, the measurement of the passing time interval “T 11 ·12” is made by measuring the time interval from the time that the sensor PC 11  turned ON to the time that the sensor PC 12  turned ON, in every time, for example 200 μsec. This measurement can be made by taking advantage of interrupt timer of the first module control CPU  10  for controlling the first module M 1 . Or the measurement can be made by a hardware timer (not shown) which is externally controlled by the first module control CPU  10 . 
     The admissibility of the passing time length is judged by the Equation (I) as shown below. As a result of judgment by the Equation I, if the passing time length is within a stipulated range, the passing time length is judged as normal (ACT 4 ; “Yes”).
 
( T 11·12 −ΔT )≦ T 11·12≧( T 11·12 +ΔT )  (I)
 
     Here, “T 11 ·12” represents the interval between the times the sheet P passes the sensors PC 11  and PC 12 . “ΔT” represents Tolerance. 
     On the other hand, in case of that the passing time interval “T 11 ·12” departs from the stipulated range shown in the Equation (I) (ACT 3 ; “No”), it is judged an occurrence of sheet jamming (ACT 14 ). 
     In ACT 4 , if the sheet P is detected by sensor PC 12  (ACT 4 ; “Yes”), passing time interval “T 12 ·13” between the times that the sheet P passes through sensors PC 12  and PC 13  is measured (ACT 5 ). This passing time interval “T 12 ·13” are checked by the Equation (I). If the passing time interval “T 12 ·13” is within the stipulated range, the passing time length is judged as normal (ACT 7 , “Yes”). 
     On the other hand, if the passing time interval “T 12 ·13” departs from the stipulated range (ACT 6 ; “No”), it is judged an occurrence of sheet jamming (ACT 14 ). 
     In a similar way as described above, if passing time interval “T 13 ·14” between the times that the sheet P passes through sensors PC 13  and PC 14  (ACT 8 ) and the discrimination result by the discriminating device  6  indicates that the sheet P is rejectable sheet, passing time interval “T 13 ·15” between the times that the sheet P passes through sensors PC 13  and PC 15  is also measured (ACT 11 ). 
     If the result of measurement is within stipulated range, the passing time interval is judged as normal (ACT 9 ; “Yes” or ACT 12 ; “Yes”). If the result of measurement departs from the stipulated range, it is judged an occurrence of sheet jamming (ACT 9 ; “No” or ACT 12 ; “No”). 
       FIG. 4  is a flow chart illustrating an operation of the discriminating device  6  provided in the first module M 1  which constitutes the sheet handling apparatus  100  of the present invention. The operation of the discriminating device  6  is executed by discrimination CPU  6 A. 
     The operation is executed by discrimination CPU  6 A in parallel to the conveying operation of the first module M 1  which is controlled by the first module control CPU  10 . 
     The discriminating device  6  is constituted by multiple detection parts, such as shape detection part, reflected light detection part, transmitted light detection part, magnetism detection part, fluorescence detection part, and thickness detection part, etc. The discriminating device  6  executes classification discrimination, destination discrimination, authenticity discrimination, and normal sheet/damaged sheet discrimination, by integrating the detection results of the multiple detection parts. 
     At the beginning, the discriminating device  6  executes authenticity (genuine/counterfeit) discrimination of sheet detected by each of the above-described detection parts (ACT 40 ). In the authenticity discrimination, primarily physical property of the sheet as a medium to be detected is discriminated. 
     If the sheet is discriminated as genuine one (ACT 40 ; “genuine sheet”) as a result of the authenticity discrimination, the discriminated sheet is further discriminated whether the sheet is first classification or not (ACT 41 ). 
     In case of that the sheet is judged as the first classification as a result of discrimination, the sheet is further discriminated whether the sheet is normal sheet or damaged sheet (ACT 42 ). In case of that the sheet is discriminated as normal as the result of discrimination (ACT 42 ; “normal sheet”), the discriminating device  6  gives notice of that the sheet is normal one of the first classification to the first module control CPU  10  (ACT 43 ). 
     In ACT 42 , if the sheet is discriminated as damaged sheet (ACT 42 ; “damaged sheet”), the discriminating device  6  gives notice of that the sheet is damaged one of the first classification to the first module control CPU  10  (ACT 47 ). 
     Next, in ACT 41 , if it is discriminated that the sheet is not the first classification (ACT 41 ; “No”), it is discriminated that the sheet is second classification or not (ACT 44 ). In case of that the sheet is judged as the second classification as a result of discrimination (ACT 44 ; “Yes”), the sheet is further discriminated whether the sheet is normal sheet or damaged sheet (ACT 45 ). In case of that the sheet is discriminated as normal as the result of discrimination (ACT 45 ; “normal sheet”), the discriminating device  6  gives notice of that the sheet is normal one of the second classification to the first module control CPU  10  (ACT 46 ). 
     Next, if the sheet is discriminated as damaged sheet as a result of discrimination in ACT 42  (ACT 42 ; “damaged sheet”) or the sheet is discriminated as damaged sheet as a result of discrimination in ACT 45  (ACT 45 ; “damaged sheet”), the discriminating device  6  gives notice of that the respective sheets are damaged ones of the first classifications to the first module control CPU  10  (ACT 47 ). 
     Next, if the sheet is discriminated as being distinctly counterfeit sheet in the authenticity discrimination in ACT 40  (ACT 40 ; “counterfeit sheet/undiscriminatable sheet”), or if it is discriminated that the sheet is not the second classification in ACT 44  (ACT 33 ; “No”), the discriminating device  6  gives notice of that the sheet is counterfeit sheet or undiscriminatable sheet to the first module control CPU  10  (ACT 48 ). 
     The first module control CPU  10  receives the discrimination result by the discriminating device  6 , and then decides stacking place which is the destination of the sheet based on the discrimination result. 
     That is, the first module control CPU  10  changes the sorting gate G 11  based on the discrimination result. Therefore, the sorting gate G 11  is changed so as that the sheet P discriminated as genuine sheet or mutilated sheet is conveyed to the module M 2  or the M 3  module M 3 . On the other hand, the gate G 11  is changed so as that the sheets discriminated as “counterfeit sheet or undiscriminatable sheet” are handled as rejectable sheet, so that they are conveyed toward the rejectable sheet stacking device  16  provided in the first module M 1 . 
       FIG. 5  is a flow chart illustrating operations of the module M 2  constituting the sheet handling apparatus  100  of the present invention. Second module M 2  is provided with stacking/banding devices  21  and  22  for stacking and banding normal ones of the first classifications. Third module M 3  is provided with stacking/banding devices  31  and  32  for stacking and banding normal ones of the second classifications. However, since the basic operation is common, operations of the stacking/banding devices  21  and  22  will be described, but descriptions of portions in the stacking/banding devices  31  and  32  which are common to those in the stacking/banding devices  21  and  22  will be omitted. 
     In this embodiment, the first module control CPU  10  of the first module M 1  and the second module control CPU  210  of the second module M 2  are connected by the LAN  50 . Therefore, classification information and destination information based on the discrimination result of the discriminating device  6  in the first module M 1 , destination information, and sheet length information by sensor PC 14  are noticed to the second module control CPU  20  of the second module M 2  from the first module control CPU  10  through LAN  50  (ACT 20 ). Based on these information, the conveyance control operation by multiple CPUs will be described. 
     The sheet P conveyed to the second module M 2  is detected by sensor PC 21  (ACT 21 ). 
     Second module control CPU  20  controls the sorting gates G 21  and G 22  based on the classifications information and the destination information which were received from first module control CPU  10 , and conveys the sheets to the stacking/banding device  21  or the stacking/banding device  22  set up for every classification. For example, in case of that the classifications discriminated with the discriminating device  6  is a genuine one of the first classifications, the discriminating device  6  controls the sorting gate G 21  so as to convey the classifications to stacking/banding device  21 . That is, every time that a sheet is detected by a sensor and then conveyed upstream from downstream of the conveyance route, the classification information and the destination information are transmitted to the control part as attributes of the sheets by being executed shift processing. Although conventionally only a destination information was executed shift processing, the present invention is characterized by that classification information and destination information are executed shift processing. 
     This shift processing is also executed in case of that the sheets are conveyed from the first module M 1  to the second module M 2  and a case of that the sheets are conveyed from the second module M 2  to the third module M 3  as described later. As a result of this shift processing, even if destinations differ for every classification of sheets, stacking to each stacking/banding device becomes possible. 
     As a result, in case of that a sheet conveyed to stacking/banding device  21  is detected by sensor PC 22 , the stacked number of the first classifications is up-counted. That is, the number of sheets actually conveyed to stacking/banding device assigned to the first classifications is calculated (counted number C 1 ). 
     This result of counting (counted number C 1 ) is transmitted to first module control CPU  10  from second module control CPU  20  through LAN  50 . 
     In first module control CPU, the number of sheets to be stacked in stacking/banding device  21  is calculated based on the above-described classification information of the sheets (counted number C 2 ). 
     Next, first module control CPU  10  cross-checks the counted number C 1  and the counted number C 2  which were received from second module control CPU. According to the cross-check, destination information is set up based on the classification information discriminated by the discriminating device  6 . When interfusion of the sheets has occurred, the occurrence of intrusion malfunction can be recognized by checking whether the sheet has been conveyed to the stacking device based on the destination information. Furthermore, according to the cross-check, if destinations of multiple sheets residing between the discriminating device  6 , and stacking/banding device are different, it is confirmed that the control of the sheets with shift processing has been surely executed. 
     Although a case where the sheets conveyed to stacking/banding device is detected by sensor PC 22  has been described above, the present invention is not limited to the case. For example, there is another way of detecting that sheet was actually taken into the impeller  21 A by sensor (not shown) which detects that the sheets was taken into the impeller  21 A. However, since the general meaning of the present invention is not limited to the detection manner of the sheets taken into the impeller  21 A, the detailed explanation of the detection manner is omitted. 
     Further, in response to the thing that sensor PC 21  is turned ON, the sheet length measurement by sensor PC 21  is started. Specifically, the time length of that the sensor PC 21  is turned ON is calculated by counting predetermined cycle clocks, for example, 200 microseconds cycle clocks (ACT 22 ). 
     Further, passing time interval T 21 ·22 until sheet reaches sensor PC 22  from sensor PC 21  is monitored (ACT 24 ). As a result of this monitoring, passing time interval T 21 ·22 is verified likely by the Equation I. If the passing time interval is within stipulated range, it will be judged normal (ACT 25 ; “Yes”). 
     On the other hand, in case of that passing time interval T 21 ·22 departs from the stipulated range (ACT 25 ; “No”), it is judged an occurrence of sheet jamming (ACT 26 ). 
     In ACT 23 , if OFF state of sensor PC 21  is detected (No of ACT 23 ), the sheet length measurement by sensor PC 21  stops, and the sheet length measurement by sensor PC 21  is started from the time that the sheet P passes sensor PC 21  (ACT 28 ). The sheet length measured by the above-described manner and the sheet length noticed from the first module control CPU  10  are judged whether the same or not (ACT 29 ). 
     On this occasion, the sheet length measured by sensor PC 14  which is a sensor resting on the most downstream position of the conveyance route in the first module M 1  of the nearest conveyance route is used. This depends on provision for being able to deem that the conveyance route is continued when results of sheet length measurements according to sensors near the connecting region of different modules are same. That is, the sheet length information transmitted from first module control CPU  10  which is a CPU arranged in upstream module and the sheet length information measured in the second module M 2  are compared with each other, and then based on the comparison result a chipped sheet is discriminated. Here, the chipped sheet means a sheet which is partially missing. Therefore, in this embodiment, sheet length is discriminated by comparing measurement results of sensors PC 14  and PC 21  arranged near the connecting region between the first module M 1  and the second module M 2  (ACT 29 ). 
     At a time of measuring sheet length, on occasion when the sheet length discriminated by the sensor PC 21  is short in compared to the sheet length discriminated by the sensor PC 14 , the sheet is judged as chipped sheet (ACT 30 ). 
     As described above, in this embodiment of the present invention, the sheet handling apparatus is compartmented to modules to the extent possible of controlling conveyance by single CPU even if the apparatus grows in size and the conveyance line increases in length. Each module is connected by LAN and the length of the conveyed sheet P is measured by module located on the upstream of the conveyance route. Thus, conveyance control for the sheet P becomes possible to executed by multiple CPUs, even in the occasion that the sheet P is conveyed through multiple modules by transmitting the data of sheet length of the sheet P as sheet length information to following module. 
     On occasion of increasing sheet classification to be handled, the above-described embodiment can be installed further the module M 4  in between the module M 2  and the module M 3 . Since CPUs are equipped in each module, conveyance controllability is equivalent to that in the case of that the module M 2  is not equipped. 
     Even in this case, since the conveyance control is executed in similar to the way of conveyance control in the first module control CPU  10  and the second module control CPU  20 . 
     The third module control CPU  30  counts the number of sheets (counted number C 3 ) practically conveyed to each stacking/banding device in every classification by changing over the sorting gates G 11 -G 32 , based on the sheet length information and the classification information transmitted from the first module control CPU (first control part)  10 . 
     The third module control CPU  30  transmits the counted number C 3  to the first module control CPU  10 . 
     The first module control CPU  10  cross-checks whether the counted number C 3  received from the third module control CPU  30  coincides the number counts in every classification transmitted to the third module control CPU  30 . As a result of this cross-check, if the discrimination results has agreed, this agreement shows that the sheet handling is executed normally. 
     As described above, in case of more module is installed, classification information and destination information are transmitted to the control CPU in each module through the LAN. 
     Control CPU of each module controls the conveyance of the sheet to be conveyed to the stacking/banding device in each module, counts the number of sheets practically conveyed into the stacking/banding device in each module, and then transmits the count to the first module control CPU  10 . 
     The first module control CPU  10  becomes to cross-check whether the count of every classification received from the control CPU in each module through the LAN coincides the number of sheets transmitted to each module. 
     As described above, even if the system is large and executes a conveyance control with multiple CPUs, the sheet handling apparatus and handling method of the present invention, is able to obtain an effect similar to that as if executing the conveyance control by single CPU, by the classification information and destination information are transmitted from the first module control CPU to the second module control CPU. Furthermore, since the classification information is transmitted as attribute incidental to the destination information of the sheets subjected to detection thereto, malfunction of interfusion of sheets to each other, etc. can be prevented.