JP2007269420A - Paper feeding device and paper feeding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent overflow and interruption of feeding of a flow rate leveling part and to enhance uniformness of a flow rate at a downstream conveying part and throughput of the whole device. <P>SOLUTION: The paper feeding device is provided with the flow rate leveling part 30 for temporarily accumulating the papers 1 fed from an upstream conveying part 20 and feeding the accumulated papers 1 to the downstream conveying part 40 while picking up them in every constant amount. The device detects an accumulation amount of the papers in the flow rate leveling part 30 at the multi-stage and controls a conveying speed of the papers 1 at the upstream conveying part 20 at the multi-stage based on the detected accumulation amount. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a paper sheet supply apparatus and a paper sheet supply method for supplying paper sheets such as postal items, and more particularly to temporarily storing paper sheets supplied from an upstream conveying unit and storing the stored paper sheets. The present invention relates to a paper sheet supply apparatus and a paper sheet supply method including a flow leveling unit that picks up a certain amount of leaves and supplies them to a downstream conveyance unit.

  2. Description of the Related Art A paper sheet supply device that supplies paper sheets such as mail is known (for example, see Patent Document 1). This type of paper sheet supply device temporarily accumulates paper sheets supplied from the upstream conveying unit, and also picks up the accumulated paper sheets by a certain amount and supplies them to the downstream conveying unit. It has. Thereby, in the paper sheet processing apparatus connected downstream, a certain amount of paper sheets are supplied, and processing for each paper sheet, for example, postmarking stamping processing, optical destination reading / recognition processing, destination This makes it possible to carry out the sorting process according to the certainty.

FIG. 6 is a plan view showing a flow leveling unit of a conventional paper sheet supply apparatus.
As shown in this figure, the flow leveling unit 100 detects the accumulation unit 102 that temporarily accumulates the paper sheets 1 sent from the upstream conveyance unit 101, and the accumulation amount of the paper sheets 1 in the accumulation unit 102. An accumulation amount detection means 103 and a pickup feeder mechanism 104 that picks up the sheets 1 accumulated in the accumulation unit 102 one by one and sends them downstream are also provided. , A vacuum suction chamber 106 that sucks the paper sheet 1 through the suction belt 105, a reverse roller 107 that rotates in a direction opposite to the conveying direction of the paper sheet 1, and a winding around the reverse roller 107 The reverse belt 108, the bottom belt 109 that supports the bottom side of the paper sheet 1, and the position of the paper sheet 1 sent from the suction belt 105 to the downstream conveyance unit 110. A plurality of sheet detector 111a~111e for detecting is configured by a driving roller 112 for normally and reversely driving the suction belt 105.

In the flow leveling unit 100 configured as described above, the sheets 1 that are overlapped or sent from the upstream transport unit 101 at indefinite intervals are accumulated in the accumulation unit 102 in a standing posture. At this time, the paper sheet 1 is sent in the downstream direction by the bottom belt 109 until the leading end abuts against the reverse belt 108.
Of the paper sheets 1 stored in the storage unit 102, the paper sheet 1 that is in contact with the suction belt 105 is sucked by the suction belt 105, and is conveyed downstream as the suction belt 105 travels. At this time, even if the next adjacent paper sheet 1 is simultaneously conveyed by mutual friction, it is pushed back to the accumulating unit 102 side by the reverse belt 108 traveling at a low speed in the direction opposite to the traveling direction of the suction belt 105. Only one sheet 1 adsorbed by the adsorbing belt 105 is sent to the downstream conveyance unit 110.

When the leading end portion of the paper sheet 1 sent out by the suction belt 105 is sandwiched between the belts of the downstream conveyance unit 110 and detected by the paper sheet detector 111a, the driving roller 112 is driven according to this detection signal. Is stopped. At this time, the proximal end side of the paper sheet 1 is sucked and held by the suction belt 105, but the transport force of the downstream transport unit 110 is stronger than this suction force. Is torn off and transported downstream.
When the paper sheet 1 sandwiched between the belts of the downstream transport unit 110 is sent out from the flow leveling unit 100, the interval between the next paper sheet 1 sent out is one of the paper sheet detectors 111a to 111e. Is detected. When an appropriate interval is detected by the paper sheet detectors 111a to 111e, the driving roller 112 is driven, the suction belt 105 starts to travel again, and the subsequent paper sheet 1 sucked by the suction belt 105 is moved. It is sent out toward the downstream conveyance unit 110.
Japanese Patent No. 2604382

  By the way, in this type of paper sheet supply device, the upstream conveyance unit is driven and controlled in accordance with the amount of paper sheets stored in the flow leveling unit. For example, the flow leveling unit 100 shown in FIG. 6 includes an amount detection lever 103a that swings according to the accumulated thickness of the paper sheet 1, and a micro switch 103b that detects the swing position of the amount detection lever 103a. If the accumulated amount of the paper sheet 1 exceeds a predetermined amount, the upstream transport unit 101 is stopped in response to the micro switch 103b being turned off, and the paper sheet 1 When the accumulation amount becomes smaller than a predetermined amount, the driving of the upstream transport unit 101 is resumed in response to the micro switch 103b being turned off. Thereby, the accumulation amount of the paper sheets 1 in the accumulation unit 102 is kept substantially constant.

  However, in the control method as described above, it is not possible to follow a large variation in the amount of paper sheets input to the paper sheet supply device, and there is a possibility that overflow or supply interruption may occur in the flow rate adjustment unit. For example, in a situation where there is a large amount of paper sheets on the upstream conveyance unit in the drive stop state, a large amount of paper sheets are supplied to the flow rate adjustment unit at the same time when the upstream conveyance unit is restarted. There is a possibility that overflow occurs in the section or paper sheets are clogged on the upstream transport section side. On the other hand, in a situation where there are few paper sheets on the upstream conveying unit, even if driving of the upstream conveying unit is resumed, sufficient paper sheets are not supplied to the flow leveling unit, so that it is accumulated in the flow leveling unit. There is a possibility that the paper will be lost and the supply will be interrupted. Such an overflow or supply interruption in the flow leveling unit not only lowers the uniformity of the flow rate in the downstream conveyance unit, but also decreases the throughput of the entire apparatus.

  The present invention has been considered in view of the above circumstances, and prevents the overflow of the flow leveling unit and the supply interruption, and improves the uniformity of the flow rate in the downstream transport unit and the throughput of the entire apparatus. An object of the present invention is to provide a paper supply device and a paper sheet supply method.

  In order to achieve the above object, the paper sheet supply apparatus of the present invention temporarily accumulates the paper sheets supplied from the upstream conveyance unit and picks up the accumulated paper sheets by a certain amount to the downstream conveyance unit. A paper sheet supply device including a flow rate leveling unit to supply, an accumulation amount detection unit that detects the accumulation amount of paper sheets in the flow rate leveling unit in multiple stages, and an accumulation detected by the accumulation amount detection unit Based on the quantity, an upstream conveyance speed control means for controlling the conveyance speed of the paper sheets in the upstream conveyance section in multiple stages is provided.

In this way, the accumulated amount of paper sheets in the flow leveling unit is detected in multiple stages, and based on the detected accumulated amount, the conveyance speed of the paper sheets in the upstream conveying unit is controlled in multiple stages, Since it is possible to satisfactorily follow fluctuations in the input amount of paper sheets, it is possible to prevent the flow leveling unit from overflowing and being interrupted, and to improve the flow rate uniformity in the downstream transport unit and the overall throughput of the apparatus.
In addition, compared to the conventional paper sheet supply device that controls the ON / OFF of the upstream conveyance section, the conveyance speed change of the upstream conveyance section becomes smoother, so that damage to paper sheets due to a sudden change in the conveyance speed is prevented. it can.

Further, the paper sheet supply apparatus of the present invention is configured such that the number of conveyance speed control stages by the upstream conveyance speed control means is larger than the number of accumulation amounts detected by the accumulation amount detection means.
In this way, it is possible to more smoothly change the conveyance speed of the upstream conveyance unit while avoiding frequent fluctuations in the amount detection level in the accumulation amount detection means.

Further, in the paper sheet supply apparatus according to the present invention, the upstream conveyance speed control unit reads the amount detection level of the accumulation amount detection unit every predetermined time, and conveys the upstream conveyance unit corresponding to the current amount detection level. In determining the speed level, the current amount detection level, the past amount detection level, and the past transport speed level are used.
In this way, it is possible to perform control in consideration of temporal changes in the accumulation amount and the conveyance speed, so that it is possible to further improve followability with respect to fluctuations in the input amount of paper sheets.

Also, the paper sheet supply method of the present invention temporarily stores the paper sheets supplied from the upstream conveyance unit, and at a flow rate for picking up the accumulated paper sheets by a certain amount and supplying them to the downstream conveyance unit. A method of supplying paper sheets using a paper cutting unit, wherein the accumulated amount of paper sheets in the flow rate smoothing unit is detected in multiple stages, and based on the detected accumulated amount, the amount of paper sheets in the upstream conveying unit is detected. This is a method for controlling the conveyance speed in multiple stages.
In this way, the accumulated amount of paper sheets in the flow leveling unit is detected in multiple stages, and based on the detected accumulated amount, the conveyance speed of the paper sheets in the upstream conveying unit is controlled in multiple stages, Since it is possible to satisfactorily follow fluctuations in the input amount of paper sheets, it is possible to prevent the flow leveling unit from overflowing and being interrupted, and to improve the flow rate uniformity in the downstream transport unit and the overall throughput of the apparatus.
In addition, compared to the conventional paper sheet supply device that controls the ON / OFF of the upstream conveyance section, the conveyance speed change of the upstream conveyance section becomes smoother, so that damage to paper sheets due to a sudden change in the conveyance speed is prevented. it can.

Further, the paper sheet supply method of the present invention is a method in which the number of control stages of the conveyance speed is greater than the number of detection stages of the accumulated amount.
In this way, it is possible to more smoothly change the conveyance speed of the upstream conveyance unit while avoiding frequent fluctuations in the amount detection level.

Also, the paper sheet supply method of the present invention detects the accumulated amount of paper sheets in the flow leveling unit every predetermined time, and determines the transport speed level of the upstream transport unit corresponding to the current amount detection level. In this case, the current amount detection level, the past amount detection level, and the past transport speed level are used.
In this way, it is possible to perform control in consideration of temporal changes in the accumulation amount and the conveyance speed, so that it is possible to further improve followability with respect to fluctuations in the input amount of paper sheets.

As described above, according to the present invention, the accumulated amount of paper sheets in the flow leveling unit is detected in multiple stages, and the conveyance speed of the paper sheets in the upstream conveying unit is determined in multiple stages based on the detected accumulated amount. By controlling the flow rate, it is possible to satisfactorily follow fluctuations in the input amount of paper sheets, so that overflow of the flow leveling unit and supply interruption are prevented, and flow rate uniformity in the downstream transport unit and overall throughput of the apparatus are improved. be able to.
In addition, compared to the conventional paper sheet supply device that controls the ON / OFF of the upstream conveyance section, the conveyance speed change of the upstream conveyance section becomes smoother, so that damage to paper sheets due to a sudden change in the conveyance speed is prevented. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic plan view showing an overall configuration of a paper sheet supply apparatus according to an embodiment of the present invention.
As shown in this figure, the paper sheet supply apparatus according to the present embodiment includes an input unit 10, an upstream conveyance unit 20, a flow rate leveling unit 30, a downstream conveyance unit 40, and a control unit 50, and includes a downstream conveyance unit. The paper sheet 1 is supplied to the paper sheet processing apparatus 60 connected downstream of 40.
The input unit 10 includes an input port 11 into which the paper sheet 1 is input and a known paper sheet transport mechanism 12 that sends out the input paper sheet 1 to the upstream transport unit 20. The paper transport mechanism 12 has a fixed transport speed regardless of the amount of paper 1 loaded.
The upstream transport unit 20 includes a paper sheet transport mechanism 21 that sends the paper sheet 1 fed from the input unit 10 to the flow leveling unit 30. As this paper sheet transport mechanism 21, a known one is used, but a paper transport speed is variable, and a mechanism controlled by the control unit 50 in multiple stages (8 stages in the present embodiment) is used.

The flow leveling unit 30 includes a storage unit 31 that temporarily stores the paper sheets 1 sent from the upstream transport unit 20, a storage amount detection unit 32 that detects a storage amount of the paper sheets 1 in the storage unit 31, A pickup feeder mechanism 33 that picks up the sheets 1 stored in the storage unit 31 one by one and sends them downstream is configured. The configurations of the storage unit 31 and the pickup feeder mechanism 33 are substantially the same as those of the conventional example shown in FIG.
The downstream transport unit 40 includes a known paper sheet transport mechanism 41 that sends the paper sheet 1 fed from the flow leveling unit 30 to the paper sheet processing device 60.
The control unit 50 is configured using a microprocessor or the like, and controls the operation of the paper sheet supply apparatus according to a program written in advance in a memory or the like.

FIG. 2 is a schematic plan view showing accumulated amount detection means of the paper sheet supply apparatus according to the embodiment of the present invention.
The accumulated amount detection means 32 provided in the flow rate leveling unit 30 detects the accumulated amount of the paper sheet 1 in the accumulation unit 31 in multiple stages (in this embodiment, three stages). For example, as shown in FIG. 2, the accumulation amount detection means 32 of the present embodiment is an amount detection lever 32a that swings around the fixed shaft 32b in accordance with the layer thickness of the sheets 1 accumulated in the accumulation unit 31. And two lever position detection sensors 32c and 32d for detecting the swing position of the amount detection lever 32a. The lever position detection sensors 32c and 32d are constituted by transmission type optical sensors (photo interrupters) that detect the swing position of the quantity detection lever 32a based on the shielding of the light projecting / receiving path by the quantity detection lever 32a. When the swing position of the lever 32a is a position corresponding to the amount detection level 1, both lever position detection sensors 32c and 32d are OFF, and the swing position of the amount detection lever 32a is a position corresponding to the amount detection level 2. In some cases, only the first lever position detection sensor 32c is ON, and when the swing position of the amount detection lever 32a is a corresponding position of the amount detection level 3, both lever position detection sensors 32c and 32d are ON. Become. As a result, the accumulation amount of the paper sheets 1 in the accumulation unit 31 can be detected in three stages.

  The amount detection level detected in multiple stages by the accumulated amount detection means 32 is read into the control unit 50 every predetermined time. Based on the read current amount detection level, the past amount detection level, and the transport speed level of the upstream transport unit 20 applied at that time, the control unit 50 selects the upstream transport unit suitable for the current amount detection level. The transport speed level of 20 is determined, and the transport speed of the upstream transport unit 20 is controlled based on the determined transport speed level.

Hereinafter, a specific example of the upstream conveyance speed control by the control unit 50 will be described.
FIG. 3 is a correlation diagram illustrating the operation of the paper sheet supply apparatus according to the embodiment of the present invention, and FIG. 4 is a graph illustrating the operation of the paper sheet supply apparatus according to the embodiment of the present invention.
In the present embodiment, the amount detection level of the accumulated amount detection means 32 is set to three levels, the transport speed level of the upstream transport unit 20 is set to eight levels, and the correlation shown in FIG. 3 is provided between the amount detection level and the transport speed level. The conveyance speed level is determined so that the relationship is generated.
For example, the current amount detection level is 2, the previous amount detection level recorded in the control unit 50 is 2, and the conveyance speed level at that time is 3 (position A in FIG. 3). If the previous amount detection level is 2 and the transport speed level at that time is 4 (position B in FIG. 3), the transport speed level of the upstream transport section 20 is 2 (position C in FIG. 3). .

Also, the current amount detection level is 2, the previous amount detection level is 1, and the transport speed level at that time is 7 (position D in FIG. 3), and the previous amount detection level is 1. If the transport speed level at that time is 7 (position E in FIG. 3), the transport speed level of the upstream transport section 20 is 6 (position F in FIG. 3).
By controlling in this way, as shown in FIG. 4, even if there is a variation in the amount of sheets fed into the loading unit 10, the amount of sheets fed out from the flow leveling unit 30 is in a stable state. .

Hereinafter, a specific control procedure for realizing such upstream conveyance speed control will be described with reference to a flowchart.
FIG. 5 is a flowchart showing a control procedure of the paper sheet supply apparatus according to the embodiment of the present invention.
As shown in this figure, in the upstream conveyance speed control (upstream conveyance speed control means) executed in the control unit 50, first, it is determined whether or not it is the reading time of the amount detection level (S1). The reading of the amount detection level is performed at predetermined time intervals (every fixed time). If the determination result is YES, after reading the amount detection level detected by the accumulated amount detection means 32 (S2), The presence / absence of the previous amount detection level is determined (S3).

Here, when there is no previous amount detection level, it is determined that the operation is started, and a reference transport speed level preset for each amount detection level is set to an initial value according to the current amount detection level (S4). Is set to the conveyance speed level (S5, S6, S7). For example, when the amount detection level is 1, 7 is set as the initial value for the transport speed level (S5), and when the amount detection level is 2, the transport speed level is set as 2 as the initial value (S6). When the amount detection level is 3, 0 is set as the initial value for the conveyance speed level (S7).

  On the other hand, when the work is not started, the current amount detection level and the previous amount detection level are compared (S8). If the current amount detection level and the previous amount detection level are different, Level-up processing (previous transport speed level + 1) or level-down processing (previous transport speed level-1) is performed. For example, if the current amount detection level is greater than the previous amount detection level, after confirming that the transport speed level is not the lower limit level 0 (S9), the transport speed level is lowered by one step (S10), If the current amount detection level is smaller than the previous amount detection level, after confirming that the transport speed level is not the upper limit level 7 (S11), the transport speed level is increased by one level (S12).

When the current amount detection level and the previous amount detection level are the same, the current amount detection level is determined (S13), and the level-up process or the level-down process using the reference transport speed level of each amount detection level as a target value I do. For example, even in a situation where the amount detection level remains 1 and does not change, level up processing is performed with reference to the reference transport speed level 7 of the amount detection level 1 (S14, S15), and the amount detection level remains 2 Even in a situation where there is no change, a level up process or a level down process is performed with the reference transport speed level 2 of the quantity detection level 2 as a target (S15, S16, S17), and the quantity detection level remains unchanged at 3. Even so, the level down process is performed with the reference transport speed level 0 of the amount detection level 3 as a target (S17, S18).
When the transport speed level is determined, the current amount detection level is set to the previous amount detection level (S19), and then the transport speed control of the upstream transport unit 20 is performed based on the determined transport speed level (S20).

The paper sheet supply apparatus of the present embodiment configured as described above temporarily accumulates the paper sheets 1 supplied from the upstream conveyance unit 20, and picks up the accumulated paper sheets 1 by a certain amount. In this case, the paper sheet supply apparatus includes a flow leveling unit 30 that supplies the downstream conveyance unit 40, and detects the accumulated amount of paper sheets in the flow leveling unit 30 in multiple stages and based on the detected accumulated amount. Therefore, since the transport speed of the paper sheet 1 in the upstream transport unit 20 is controlled in multiple stages, the amount of paper input can be changed compared to a conventional paper sheet supply apparatus that controls the upstream transport unit 20 to be turned on and off. It can follow well. Thereby, overflow of the flow leveling unit 30 and supply interruption can be prevented, and the flow rate uniformity in the downstream transport unit 40 and the throughput of the entire apparatus can be improved.
Further, since the change in the conveyance speed of the upstream conveyance unit 20 is smoother than that of the conventional paper sheet supply device that controls the upstream conveyance unit 20 to be turned on / off, the paper sheet 1 is damaged due to a sudden change in the conveyance speed. Can also be prevented.

  Further, in the paper sheet supply apparatus of the present embodiment, the number of control stages of the transport speed in the upstream transport speed control is larger than the number of stages of detection of the storage amount by the storage amount detection means 32, so the amount detection level in the storage amount detection means 32 Thus, the change in the conveyance speed of the upstream conveyance unit 20 can be made smoother while avoiding frequent fluctuations.

  Further, in the paper sheet supply apparatus according to the present embodiment, when the amount detection level of the accumulated amount detection unit 32 is read every predetermined time, and the conveyance speed level of the upstream conveyance unit 20 corresponding to the current amount detection level is determined. Because the current amount detection level, the past amount detection level, and the past transport speed level are used, it is possible to control the accumulated amount and the temporal change of the transport speed, and as a result, The followability to fluctuations can be further improved.

  Needless to say, the present invention is not limited to the embodiment. For example, in the above-described embodiment, the case where the amount detection level is 3 steps and the conveyance speed level is 8 steps has been described, but it goes without saying that the number of steps of the amount detection level and the conveyance speed level is not limited to the number of steps of this embodiment. In other words, the number of level detection level steps and the number of conveyance speed level steps to be used can be selected according to the required flow leveling performance and design restrictions, and the amount detection level shown in FIG. The correlation of the conveyance speed level is also reviewed.

  In the above embodiment, the amount detection level of the accumulated amount detection means is fetched at regular intervals, and the current amount detection level is supported by using the current amount detection level, the past amount detection level, and the past transport speed level. However, instead of reading the amount detection level of the accumulation amount detection means at regular intervals, the elapsed time from the past change point when the amount detection level of the accumulation amount detection means has changed. Even when the transport speed level is determined based on this elapsed time, the transport speed control can be performed in consideration of the temporal change in the accumulated amount. In addition, the amount detection level and the conveyance speed level can be fixedly associated with each other without considering the temporal change in the amount detection level.

  As an example of the quantity detector, in FIG. 2, the quantity detection level is set to 3 by detecting the position of the quantity detection lever whose swing angle changes according to the accumulated quantity of paper sheets with two optical sensors. Although an example of detection in stages has been shown, it is also possible to set the amount detection level more finely (that is, increase the number of steps of the amount detection level) by increasing the number of sensors that detect the position of the amount detection lever. is there. Further, it is possible to set the amount detection level more finely by detecting the position of the amount detection lever using an optical distance sensor or the like.

  The present invention temporarily stores the paper sheets supplied from the upstream conveyance unit, and supplies the paper sheets with a flow amount leveling unit that picks up the accumulated paper sheets by a certain amount and supplies them to the downstream conveyance unit. The present invention is applied to an apparatus and a paper sheet supply method using the apparatus. In particular, the present invention can be suitably used for a paper sheet supply device for supplying paper sheets to a postmark stamp processing machine, a destination reading recognition processing machine and a sorting machine, or a printed paper sorting machine and an inspection device.

It is a schematic plan view which shows the whole structure of the paper sheet supply apparatus which concerns on embodiment of this invention. It is a schematic plan view which shows the accumulation amount detection means of the paper sheet supply apparatus which concerns on embodiment of this invention. It is a correlation diagram which shows the effect | action of the paper sheet supply apparatus which concerns on embodiment of this invention. It is a graph which shows the effect | action of the paper sheet supply apparatus which concerns on embodiment of this invention. It is a flowchart which shows the control procedure of the paper sheet supply apparatus which concerns on embodiment of this invention. It is a top view which shows the flow volume leveling part of the paper sheet supply apparatus which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper sheet 10 Input part 11 Input port 12 Paper sheet conveyance mechanism 20 Upstream conveyance part 21 Paper sheet conveyance mechanism 30 Flow volume adjustment part 31 Accumulation part 32 Accumulation amount detection means 32a Amount detection lever 32c Lever position detection sensor 32d Lever Position detection sensor 33 Pickup feeder mechanism 40 Downstream transport unit 41 Paper sheet transport mechanism 50 Control unit 60 Paper sheet processing apparatus

Claims (6)

A paper sheet supply apparatus that temporarily stores paper sheets supplied from an upstream conveyance unit, and includes a flow leveling unit that picks up the accumulated paper sheets by a certain amount and supplies them to a downstream conveyance unit. ,
Accumulated amount detection means for detecting the accumulated amount of paper sheets in the flow leveling unit in multiple stages;
An upstream paper feed speed control means for controlling the paper feed speed in the upstream transport section in multiple stages based on the accumulated quantity detected by the accumulated quantity detection means.   2. The paper sheet supply apparatus according to claim 1, wherein the number of stages of conveyance speed control by the upstream conveyance speed control means is greater than the number of accumulation stages detected by the accumulation amount detection means.   When the upstream conveyance speed control means reads the quantity detection level of the accumulated quantity detection means at predetermined time intervals and determines the conveyance speed level of the upstream conveyance unit corresponding to the current quantity detection level, the current quantity detection is performed. 3. The paper sheet supply apparatus according to claim 1, wherein a level, a past amount detection level, and a past transport speed level are used. This is a paper sheet supply method using a flow leveling unit that temporarily accumulates paper sheets supplied from the upstream conveyance unit and picks up the accumulated paper sheets by a certain amount and supplies them to the downstream conveyance unit. And
Detecting the accumulated amount of paper sheets in the flow leveling section in multiple stages;
A paper sheet supply method, wherein the paper sheet conveyance speed in the upstream conveyance unit is controlled in multiple stages based on the detected accumulated amount.   5. The paper sheet supply method according to claim 4, wherein the number of control stages of the conveyance speed is greater than the number of detection stages of the accumulated amount.   When the accumulated amount of paper sheets in the flow leveling unit is detected every predetermined time, and the transport speed level of the upstream transport unit corresponding to the current amount detection level is determined, the current amount detection level, the past 6. The paper sheet supply method according to claim 4, wherein an amount detection level and a past conveyance speed level are used.

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