CN101778786B

CN101778786B - Document delivery apparatus and method of controlling the same

Info

Publication number: CN101778786B
Application number: CN200780053705.8A
Authority: CN
Inventors: 镝木清忠
Original assignee: Banctec Japan Inc
Current assignee: Jim Press Spy Of Amada Co Ltd
Priority date: 2007-07-10
Filing date: 2007-07-10
Publication date: 2014-08-27
Anticipated expiration: 2027-07-10
Also published as: JP5595039B2; CN101778786A; JPWO2009008065A1; WO2009008065A1

Abstract

With respect to the delivery speed of forms delivery apparatus, the delivery speed is made variable in conformity with delivery conditions, such as form condition, size, thickness, paper quality and mixing thereof, in order to maximize the period of normal delivery. Accordingly, the highest processing efficiency of forms delivery apparatus is attained, and the speed of forms delivery is optimized.

Description

Document conveying apparatus and document conveying apparatus control method

Technical Field

The present invention relates to a document feeding device and a document feeding device control method, and more particularly, to a document feeding device and a document feeding device control method capable of reading information indicating a document such as a ticket conveyed at high speed and controlling conveyance based on the read information.

Background

In the state of the art, the document feeding device is focused on improving the processing speed, and competition is developed for the number of processed sheets per minute. However, it is necessary to increase the processing speed to increase the document conveying speed, and the state of the document causes many conveying failures (jams) due to the increase in the conveying speed, and conversely, the time until the processing is completed increases.

That is, when the transport speed of the document (ticket) is increased, due to the presence of special paper such as thin paper, carbon paper, pressure-sensitive paper, or due to the variety and size of the paper to be processed by the ticket, normal transport is not possible during high-speed transport, the stop time is rather increased, the time required for processing is increased in a sudden manner, and a long time is required for processing at the instantaneous processing speed described in the machine specification.

For example, the maximum processing capacity of a high-speed conveyor machine with the capacity to process 1,000 sheets per minute without stopping the machine is hourly

1,000 sheets × 60 min to 60,000 sheets/hr,

however, assuming that the time required for restarting the machine after stopping every 1,000 sheets due to the sheet state or the like, confirmation of the final sheet, removal of the sheet from the machine, correction, or the like is 3 minutes each time, the number of sheets that can be actually processed every 1 hour is 1 minute, and the stop time is 3 minutes for the operating time, that is, the actual operating time is 15 minutes for 1 hour. Thus, it is possible to prevent the occurrence of,

1,000 × 15 minutes (actual working time) 15,000 sheets/hour

The processing efficiency is reduced. On the contrary, in having

15,000 pieces/60 min-250 pieces/min

That is, when a machine having a processing capacity of 250 sheets per minute and a processing capacity of one fourth of the high-speed machines described above is continuously operated, the operation efficiency is completely equal.

For example, in this case, if it is assumed that the operation can be stably performed at a speed of 500 sheets per minute, the processing can be performed

500 sheets × 60 min is 30,000 sheets/hr,

a high processing efficiency of twice as high as that of a high speed machine of 1,000 sheets per minute or a low speed machine of 250 sheets per minute can be obtained.

As described above, it is considered that the processing efficiency is improved although the conveying speed is reduced as compared with the highest speed conveyance due to the type or state of the document to be conveyed.

However, even if the processing device needs to collect necessary information from the conveyance target or control the conveyance path in accordance with the collected information, and simply change the conveyance speed of the conveyance target such as a ticket, the processing device needs to adjust the control timing of the other control unit in accordance with the change in the conveyance speed, and adjust the timing of each of the other components individually again so as to perform processing in accordance with the conveyance speed, which requires a lot of work.

Disclosure of Invention

The present invention has been made in view of the above, and an object thereof is to provide a document conveying apparatus capable of performing continuous operation at a conveying speed optimized for a condition of an object to be conveyed, and the like.

The object of the present invention is to provide a document conveying device, for example, from the viewpoint that the processing efficiency is improved by the conveying speed corresponding to the state of the conveying object compared with the meaningless high-speed operation, for the mechanical operation of the document conveying device, and for example, for an image camera (a photographing camera), an OCR reader, a printer, and all other devices attached to the document conveying device, respective mechanism control timings for examining timings to be set for respective configurations corresponding to the conveying speed changed when the conveying speed is changed are prepared as list data, by referring to the list data, timing control of each configuration according to the conveyance speed can be performed, and the conveyance speed (processing speed) can be easily set according to the state of the object to be processed.

The document conveying apparatus according to the present invention has an advantage that an optimum document processing can be performed at a conveying speed according to the type or state of the conveying object.

Drawings

Fig. 1 is a block diagram for explaining a schematic operation of control according to an embodiment of the present invention.

Fig. 2 is a diagram showing a configuration example of the speed parameter file of the present embodiment.

Fig. 3 is a block diagram showing a schematic configuration of the entire document processing apparatus according to the present embodiment.

Fig. 4 is a flowchart for explaining the conveyance speed change control according to the present embodiment.

Detailed Description

An embodiment according to the present invention is explained below with reference to the drawings. First, a schematic operation of the present embodiment will be described with reference to fig. 1.

< brief description of the operation >

In the present embodiment, the main control unit 100 shown in fig. 1 is constituted by a microcomputer system constituted by an LSI (large scale integrated circuit), for example, and controls the entire system of the present embodiment. The conveying mechanism is controlled by a mechanism driving motor 250 and a mechanical speed control unit 200.

The mechanism driving motor 250 constituting the conveying mechanism drives and controls all of the conveying systems of the plurality of units at each stage, and the machine speed control unit 200 performs drive control so that the plurality of driving motors operate in cooperation to achieve the same conveying speed.

The main control section 100 controls an image pickup unit including a camera control section 300, an image scanning camera 350, and the like, and can control the image scanning camera 350 and the like which read image information (entire image of the object and the like) indicated on the conveyance object via the camera control section 300.

The print control section 400 and the printing mechanism 450 constitute a printing unit, and the main control section 100 prints information indicating that a ticket or the like has been processed at the time when the ticket or the like is conveyed to a predetermined position where the printing mechanism 450 of the printing unit is disposed.

The reading control unit 500 and various reading devices constitute a reading unit, and the reading control unit 500 controls the various reading devices 550 that read various information and the like indicated in a specific area of the conveyance target object.

The rotary sheet storage control unit 600 and the rotary storage control motor 650 constitute a stacking unit, and the rotary storage control motor 650 rotationally drives a plurality of spiral rotary blades for reliably and safely storing a delivery target (sheet) in the stacker. In an actual apparatus, such a stacking unit is provided to the extent of the number of pockets, 10 stacking units are connected if the accommodating pocket is 10 pockets, 20 stacking units are connected if the accommodating pocket is 20 pockets, only one stacking unit is connected if there is only one pocket, and in the case of accommodating sheets in the own stacking unit, the rotary sheet accommodating control section 600 drives the rotary accommodating control motor 650 while separately accommodating sheets from the conveying path into the own unit.

The main control unit 100 may be constituted by a microcomputer system, and performs various controls according to a stored operation program. In the present embodiment, the conveyance target objects such as sheets stored in the hopper portion are separated and conveyed one by one under the control of the machine speed control portion 200.

The camera control unit 300 captures all image data by the image camera 350 at the timing when the object to be conveyed is conveyed to the arrangement position of the image camera 350, reads the entire image of the object to be transmitted, and sends the image to the main control unit 100.

The main control unit 100 associates the read image with the analysis result of the information read by the read control unit 500 for the same ticket sent subsequently, and stores the result in the database 900.

The results of the image analysis of the specific region by the reading control section 500 and the main control section 100 include, for example: bill specific information such as an invoice number and a bill number; ticket issuance destination information; ticket use destination information; information to be processed such as money amount information; date and time information that should be processed, etc. This information is analyzed by various necessary identification programs in accordance with the specification of the processing target object, and arbitrary information at an arbitrary location is analyzed.

The database 900 is configured to register the entire image of the processing target object and the necessary analysis result as information of the ticket to be transported, and to be accessible from the microcomputer system of the request source requesting the processing, if necessary. In addition, access is not allowed except to the trusted source.

The printing mechanism 450 is disposed downstream of the image camera 350 on the conveying path, and prints, for example, a mark indicating completion of processing so that the processing object can be confirmed at any time by accessing the image information later at least if the entire image is normally taken in. Thus, even if a mistake is made later and the processing is performed again, the already processed article can be easily determined.

The rotary sheet accommodation control section 600 and the rotary accommodation control motor 650 constitute a stacking unit, and preferably, the structure of the stacking unit is the same as that described in japanese patent application laid-open No. 2003-54812, which was previously filed by the inventor. According to this configuration, conveyed articles can be stacked reliably and safely regardless of the state, conveying speed, number, thickness, and size of the conveyed articles.

< description of conveyance speed Change control >

In each of the configurations shown in fig. 1, it is considered that a jam occurs in the middle of the process at a high conveyance speed due to the specification and the state of the object to be conveyed by the machine speed control unit 200. In this case, even if the conveying speed is simply changed, consistency of the processing timing of other configurations cannot be obtained.

That is, the timing when the object reaches the arrangement position of each structure, the timing when the operation is actually started, and the timing when the operation is ended differ for each structure due to the conveyance speed, and conventionally, after the conveyance speed is changed, each timing must be adjusted.

In the present embodiment, control timing information of each configuration is acquired in advance for each conveyance speed and type or state of the conveyance target by a test run or the like, and is held as the speed parameter file 150. When it is necessary to change the conveyance speed, an optimum parameter information set is selected from the changed conveyance speed and the conveyance object.

When one of the parameter information sets is selected, the main control unit 100 reads the speed parameter information set selected from the speed parameter file 150 as the operation timing of each control unit.

Then, by performing drive control based on the speed parameter information, conveyance can be performed at the selected conveyance speed. The structure of such a speed parameter file 150 is illustrated in fig. 2. In the example of fig. 2, parameters for each of 400, 500, 600, 800, and 1000 sheets of paper at a conveyance speed are registered, and as the type of the conveyance target object at each conveyance speed, there are registered, in general, "special paper" having poor stiffness such as "thin paper" and "copy paper" having a thin thickness, "thick paper" having high stiffness, "mixed ticket" in which a plurality of types of thin films are mixed or conveyed in a state of being bound together, and "large paper" in which a large film is conveyed.

However, the present invention is not limited to the above examples, and any article such as a home-delivery invoice, securities, a check, a deposit paper, and a business-specific invoice may be a transport target. Alternatively, the parameters may be selected depending on the installation location of the system or the ambient climate during operation, for example, when the humidity is high such as in stormy weather in which the stiffness of the paper is low, or when the humidity is low such as in fine weather in which the stiffness of the paper is high, depending on the environmental conditions.

< description of the overall operation of the apparatus >

Next, a schematic configuration of the entire device of the present embodiment including the above configuration will be described with reference to fig. 3. Fig. 3 is a block diagram showing a schematic configuration of the entire document processing apparatus according to the present embodiment. The document processing apparatus (hereinafter, also simply referred to as an apparatus) includes a hopper device (hopper unit) 10 that separately conveys stacked documents (for example, "sheets") as objects to be conveyed one by one, a reading device (recording unit) 20, a discriminating device (time unit) 30, and a stacking device 40.

The mechanical speed control unit 200 and the mechanism drive motor 50 control the transport speed of a not-shown transport belt that transports documents to the respective devices. In this embodiment, holes are opened at regular intervals on the conveyor belt, and air is sucked from the back side and moved in a state where the object to be conveyed is sucked onto the conveyor belt. Therefore, even an article such as a receipt having poor stiffness can be reliably conveyed.

The hopper device 10 is a device for separating and conveying documents, sheets, and the like (hereinafter, they will be collectively referred to as "sheets" for simplicity of explanation), which are placed thereon, and separates sheets having various thicknesses and which are not necessarily bound, in a single bundle, and conveys them to the reading device 20.

In the reading apparatus 20 of the present embodiment, the image pickup unit (two units for front and back image pickup), the printing unit, and the reading unit shown in fig. 1 are sequentially built in and arranged in one housing, and as will be described later, the conveyance state of the sheet conveyed by the hopper apparatus 10 is detected, or the image information of all the front and back surfaces of the sheet is read from the upper and lower surfaces of the conveyance path by the image camera 350, and the main control unit 100 performs predetermined image analysis processing and the like together with the information read by the various kinds of reading devices 550.

When a sheet conveyed by the hopper device 10 is conveyed to the position of each of the reading devices 550, information on a predetermined area on the front or back surface of the sheet is electronically taken in by each of the reading devices 550, and the information is read as an image of characters or the like described in the predetermined area of the sheet, or a change in magnetic or electric signals, and the information is analyzed mainly by the action of the main control unit 100 to extract the contents of the description. The information introduced electronically is not limited to such image information, and may be magnetic data or barcode information, and the type of data is not limited.

The determination device 30 is located at the rear (downstream side) of the reading device 20, and can determine, by a method described later, whether the sheet fed from the reading device 20 is a sheet of a single structure (single sheet), whether the sheet is in a state in which another sheet is added (for example, a so-called double sheet accompanied by a sheet feed or a flyer), whether the sheet is not conveyed in a state in which a single sheet is overlapped with another single sheet, or the like.

The stacker device 40 functions as a document storage unit on the downstream side of the determination device 30, and places the delivered sheets on a sorting stacker (pocket) in response to an instruction corresponding to the analysis result from the main control unit 100 or the like.

Further, the scanner includes a monitoring unit 60 functioning as an operation unit, a display unit, or the like, and is used for an operator to input various kinds of operation information, to display an operation state of the apparatus, or to visually display an image read by the reading device 20.

< description of automatic control operation of conveyance speed >

In the apparatus of the present embodiment having the above configuration, it is possible to perform the reading and analysis processing of the ticket information and to control the conveying speed. Next, the control of the conveying speed will be described with reference to the flowchart of fig. 4. Since the normal sheet conveyance control, sheet information reading discrimination control, and stack storage control are the same as those of the known document processing method, detailed description thereof will be omitted.

First, in step S101, for example, a conveyance speed and a sheet type to be set first are selected from the touch panel of the monitoring unit 60 according to a state of a sheet, a required processing amount, and the like. The main control section 100 that receives the selection result takes in the selected parameter from the speed parameter file 150 shown in fig. 2 as an initial value. Thereafter, the process proceeds to step S3.

In step S3, the target operation rate is calculated and registered in the database 900 as the target operation rate. The target operation rate is set to 100% when the target amount of processing can be performed, by calculating a processing target amount per unit time calculated from the selected conveyance speed and conveyance target object type. That is, the number of times of transmission errors allowed within a fixed time is determined, and the target operation rate is determined by whether or not the number of times is suppressed within the determined number of times.

Next, in step S105, a measurement time that is a basis for determining whether the selected conveyance speed is appropriate is initialized. Then, in the next step S107, if it is the first, the speed parameter value corresponding to the conveyance speed specified by the initial value read in step S101 is transferred to each unit.

For example, if the mixed sheets are processed at the transport speed 800, the machine speed control unit 200 sets the transport speed to 800 sheets per minute based on "m 84" acquired as the speed control parameter information (S10). The camera control unit 300 sets "g 84" as parameter information, and sets timing for starting image capturing, image capturing range information, and the like (S20). "p 84" is set in the print control section 400, the print timing is controlled based on the set parameter information (S30), and "r 84" is set as parameter information in the read control section 500, and the information of the ticket area based on the set parameter information is read by the corresponding reading device (S40). The rotary accommodation control unit 600 sets pocket control parameter information "S84" and accommodates the ticket in the pocket according to the set parameter information (S50).

In the processing of step S10, the variable speed of the mechanical speed control unit 200 is associated, for example, the variable speed of the mechanical speed of the transport mechanism in the sheet processing is associated in all the following devices, and the start and processing time at which the operation should be performed at the changed correct time in each of the additional devices are generated and transmitted.

That is, carry out

(1) Variable speed mapping for sheet cut-out mechanism

(2) Variable speed mapping of sheet transport mechanism

(3) The ticket tracing control circuit part is corresponding to the variable speed.

In the process of step S20, the variable speed of the photographing time of the camera control unit 300 corresponds to the change of the sheet transport speed of the image camera 350, and the photographing time of the camera changes, thereby causing shading in the photographed image. To solve this problem, the camera control section 300 has a digital light amount amplifier, amplifies the light amount according to the transport speed parameter sent from the main control section 100, and automatically captures an image with a correct light amount for the changed transport speed.

In the processing of step S30, variable speed matching of the printing time to the printing mechanism 450 of the print control section 400 is performed. The printing mechanism 450 is constituted by an inkjet printer, for example. Therefore, when the conveying speed is changed, the size of the printed characters is lengthened or shortened. To avoid this, the print control unit 400 has a function of calculating the size of a print character font according to the transport speed parameter issued by the main control unit 100, and automatically printing characters of the same size at the changed transport speed.

In the processing of step S40, the reading control unit 500 performs variable speed matching, and automatically performs reading time control for the conveying speed according to the change in the conveying speed parameter of each reading device, for example, a character reader, a barcode reader, a symbol recognition reader, or an image reader.

In the processing of step S50, variable speed matching of the rotational storage control unit 600 is performed, and the sheet storage speed is automatically controlled to an optimum speed for the changed transport speed based on the transport speed parameter sent from the main control unit 100, as in the case of the other control units.

Thus, control is achieved that can process the mixed sheets at a conveying speed of 800 sheets per minute without performing fine adjustment by only supplying parameter information to each unit.

Next, in step S107, the flow proceeds to step S109, and the hopper device 10 and the machine speed control unit 200 are activated to start driving the conveyor belt and start separating and conveying sheets to be processed one by one from the hopper device 10. Then, the sheet is transported, the sheet information is read, and pocket control is performed according to the read result, thereby performing sheet processing.

Next, in steps S110 to S114, the main control unit 100 monitors the conveyance state for a predetermined time period (measurement time) from the start of conveyance. First, in the processing of step S110, a conveyance failure is detected by a conveyance failure detection sensor or the like not shown in the figure, or a reading/printing failure is detected, and it is checked whether or not conveyance of a ticket is stopped. The conveyance of the sheets is stopped when a sheet is detected to jump up and cannot be conveyed correctly, when double feeding in which two or more sheets are conveyed is detected, or when the sheet is not in an appropriate shape (when the sheet is fed obliquely). After that, the operator returns the unprocessed sheets including the erroneously conveyed sheets to the hopper device again, and performs the processing for restarting the apparatus.

If the stop/restart processing is not performed in step S110, the process proceeds to step S114. On the other hand, when the stop/restart process is performed, the process proceeds to step S112, and the stop count counting unit that counts the number of stops completes one count. Then, the process proceeds to step S114.

In step S114, it is checked whether or not the measurement time has elapsed. If the measurement time has elapsed, the process returns to step S110 to monitor the occurrence of the conveyance failure. However, when the measurement time has elapsed, the process proceeds to step S120, where the time during which the conveyance is actually stopped is cumulatively calculated, and the actual operation rate is calculated.

Next, in step S122, the actual operation rate calculated in step S120 is compared with the actual operation rate as the target value in step S103. As a result, if the actual operation rate does not reach the target operation rate, or if many transport errors occur, the process proceeds to step S124. In this case, since the conveyance error is reduced if the conveyance is performed at a speed lower than the current conveyance speed, the conveyance speed is selected to be one step slower, the corresponding speed parameter information is read out from the speed parameter file 150 and introduced, and the process proceeds to step S126. For example, in the case where 800 sheets per minute is selected as the conveyance speed, speed parameter information corresponding to the conveyance speed of 600 sheets per minute is introduced.

On the other hand, if the actual operation rate is equal to or higher than the target operation rate in step S122, that is, if the conveyance error is small, the process proceeds to step S130. In this case, since there is a possibility that the conveyance can be performed at a high speed higher than the current conveyance speed, the conveyance speed is selected to be one step faster, the corresponding speed parameter information is read out from the speed parameter file 150 and introduced, and the process proceeds to step S126. For example, when 800 sheets per minute is selected as the conveyance speed, the corresponding speed parameter information of the conveyance speed of 1,000 sheets per minute is introduced.

In step S126, it is checked whether the newly selected conveying speed is above the highest conveying speed or below the lowest speed. When the speed is equal to or higher than the maximum speed or equal to or lower than the minimum speed, the conveyance speed control is not meaningful, and therefore the conveyance speed control process ends.

On the other hand, when the conveyance speed newly selected in step S16 is within the range of the highest conveyance speed or the lowest conveyance speed, the process proceeds to step S105, and the conveyance speed is changed according to the new speed parameter.

As described above, according to the present embodiment, if there are many conveyance errors, the conveyance speed is reduced, and if there are no conveyance errors, the processing can be performed at a faster conveyance speed, and the most efficient sheet conveyance processing is always realized.

That is, the following is prevented: the sheet transport control is realized in the shortest time that can be realized by the machine by repeating the jam while carrying out the highest-speed transport that can be realized by the machine, or by carrying out the processing at a slow transport speed although the processing can be actually carried out at a faster transport speed.

Further, even if the switching of the conveyance speed is performed, it is only necessary to set the speed parameter information registered in advance in each unit, and it is not necessary to perform fine adjustment, so that the switching of the conveyance speed can be easily performed, and the workload involved in the change can be minimized. Therefore, control for automatically changing the conveyance speed is realized.

However, the change of the transport speed is not always automatically performed until the change of the transport speed is completed, and the change of the transport speed may be instructed, and for example, a notification of the contents that the processing can be performed at a high speed, a warning that the transport speed is slowed, or the like is displayed on the monitor 60, and the transport of the ticket is started while waiting for an instruction of the operator to keep the transport speed unchanged, to increase the transport speed, or to decrease the transport speed. In this case, instead of determining and monitoring the measurement time, the processing of steps S120 and S122 may be performed by observing the occurrence of a jam at the same transport speed in the past at the time of restart after the occurrence of a jam.

Industrial applicability of the invention

The invention provides a document conveying device and a control method of the document conveying device, which can continuously operate according to the condition of the conveyed object by using the optimum conveying speed suitable for the condition, and further can perform timing control of each structure according to the conveying speed, and as a result, the conveying speed (processing speed) can be easily set according to the state of the processed object.

Claims

1. A document conveying device having an imaging unit, a printing unit, a reading unit, and a stacking unit, the document conveying device being capable of acquiring information indicated on a processing object while conveying the processing object along a conveying path, the document conveying device comprising:

a conveying mechanism for holding a plurality of documents as the processing objects, sucking the held processing objects by air sucked from a plurality of holes provided in the conveying path, and separating and conveying the processing objects one by one,

a conveying speed control mechanism for controlling the conveying speed of the conveying mechanism,

an information acquiring means for acquiring necessary information from the processing object,

a parameter holding means for holding control parameters of the conveying speed control means and the information acquisition means for each of the conveying speeds controllable by the conveying speed control means in accordance with the type and state of the object to be processed,

a conveyance condition monitoring unit that monitors a conveyance condition of the processing target in the conveyance unit;

the control parameters include control timing information of the image pickup unit, the printing unit, the reading unit, and the stacking unit, which is acquired in advance for each of the conveying speed and the type and state of the object to be processed,

the conveyance condition monitoring means obtains an actual operation rate from an occurrence time of a conveyance abnormality of the processing object based on a monitoring result of the conveyance condition in a predetermined measurement time, calculates a conveyance error occurrence frequency from the actual operation rate and a preset target operation rate, selects a parameter having a slow conveyance speed as one of the parameter information among the control parameters held by the parameter holding means based on a type and a state of the processing object and a processing request when it is determined that the conveyance error occurrence frequency is high, and sets the selected parameter in the conveyance speed control means and the information acquisition means, wherein the conveyance speed control means and the information acquisition means perform a document conveyance process at a time when the conveyance speed is slowed down based on the set parameter information, and the image capturing means, The printing unit, the reading unit, and the stacking unit operate based on the control timing information corresponding to the selected parameter with the slow conveying speed.

2. A document conveying device having an imaging unit, a printing unit, a reading unit, and a stacking unit, the document conveying device being capable of acquiring information indicated on a processing object while conveying the processing object along a conveying path, the document conveying device comprising:

the conveyance condition monitoring means obtains an actual operation rate from an occurrence time of a conveyance abnormality of the processing object based on a monitoring result of the conveyance condition in a predetermined measurement time, calculates a conveyance error occurrence frequency from the actual operation rate and a preset target operation rate, selects a parameter having a high conveyance speed as one of parameter information among the control parameters held by the parameter holding means based on a type and a state of the processing object and a processing request when it is determined that the conveyance error occurrence frequency is low, and sets the selected parameter in the conveyance speed control means and the information acquisition means, wherein the conveyance speed control means and the information acquisition means perform document conveyance processing at a timing when the conveyance speed is increased based on the set parameter information, and wherein the image pickup means, the printing means, the image capture means, The reading unit and the stacking unit operate based on the control timing information corresponding to the selected parameter having the high conveying speed.

3. A method for controlling a document conveying device having an imaging unit, a printing unit, a reading unit, and a stacking unit, capable of acquiring information indicated on a processing object while conveying the processing object along a conveying path, includes: a conveying mechanism that holds a plurality of documents as the processing objects, sucks the held processing objects with air sucked from a plurality of holes provided in the conveying path, and separates and conveys the processing objects one by one; the conveying speed control mechanism is used for controlling the conveying speed of the conveying mechanism; an information acquisition means for acquiring necessary information from the processing object; a parameter holding means for holding control parameters of the conveying speed control means and the information acquisition means for each conveying speed that can be controlled by the conveying speed control means, in accordance with the type and state of the object to be processed; a conveyance condition monitoring unit that monitors a conveyance condition of the processing target in the conveyance unit; wherein,

the control parameters include control timing information of the image pickup unit, the printing unit, the reading unit, and the stacking unit acquired in advance for each of the conveyance speed and the type and state of the processing object, the conveyance condition monitoring means calculates an actual operation rate from an occurrence time of the conveyance abnormality of the processing object based on a monitoring result of the conveyance condition in a predetermined measurement time, calculates a conveyance error occurrence frequency from the actual operation rate and a preset target operation rate, and selects a parameter having a slow conveyance speed as one of the parameter information among the control parameters held by the parameter holding means based on the type and state of the processing object and a processing request when it is determined that the conveyance error occurrence frequency of the processing object is high, and supplies the selected parameter to the conveyance speed control means and the information acquisition means, the conveying speed control means and the information acquisition means perform the document conveying process at a timing when the conveying speed is slowed down based on the selected parameter information of the provided conveying condition monitoring means, and the image pickup unit, the printing unit, the reading unit, and the stacking unit operate based on the control timing information corresponding to the selected parameter of the conveying speed that is slow.

4. A method for controlling a document conveying device having an imaging unit, a printing unit, a reading unit, and a stacking unit, capable of acquiring information indicated on a processing object while conveying the processing object along a conveying path, includes: a conveying mechanism that holds a plurality of documents as the processing objects, sucks the held processing objects with air sucked from a plurality of holes provided in the conveying path, and separates and conveys the processing objects one by one; the conveying speed control mechanism is used for controlling the conveying speed of the conveying mechanism; an information acquisition means for acquiring necessary information from the processing object; a parameter holding means for holding control parameters of the conveying speed control means and the information acquisition means for each conveying speed that can be controlled by the conveying speed control means, in accordance with the type and state of the object to be processed; a conveyance condition monitoring unit that monitors a conveyance condition of the processing target in the conveyance unit; wherein,

the control parameters include control timing information of the image pickup unit, the printing unit, the reading unit, and the stacking unit acquired in advance for each of the conveyance speed and the type and state of the processing object, the conveyance condition monitoring means calculates an actual operation rate from an occurrence time of the conveyance abnormality of the processing object based on a monitoring result of the conveyance condition in a predetermined measurement time, calculates a conveyance error occurrence frequency from the actual operation rate and a preset target operation rate, and selects a parameter having a high conveyance speed as one of the parameter information among the control parameters held by the parameter holding means based on the type and state of the processing object and a processing request when it is determined that the conveyance error occurrence frequency of the processing object is low, and supplies the selected parameter to the conveyance speed control means and the information acquisition means, the conveying speed control means and the information acquisition means perform document conveying processing at a timing when the conveying speed is increased based on the selected parameter information of the provided conveying condition monitoring means, and the image pickup unit, the printing unit, the reading unit, and the stacking unit operate based on the control timing information corresponding to the selected parameter at which the conveying speed is high.