JP3382009B2 - Paper processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper sheet for processing paper sheets.
The present invention relates to a kind processing apparatus .

[0002]

2. Description of the Related Art Heretofore, a stacking impeller has been used in a sheet stacking apparatus applied to a sheet stacking apparatus for determining and stacking various kinds of sheets. In this stacking impeller, paper sheets continuously conveyed by the conveying device are inserted one by one into a groove between the blades, and are stacked at a reduced speed.

Here, in order to prevent a paper jam or collision between a paper leaf and a blade, the rotation speed of the stacking impeller is set so that one paper sheet can enter one groove without fail when inserting the paper leaf. You need to control.

[0004] A first conventional control method of the rotation speed of the integrated impeller is as follows. 1 with an optical axis at a position crossing the transport path separated from the stack impeller entrance by a standard pitch of paper
Only one photoelectric sensor is arranged, and when a sheet traverses this portion, the sensor output changes and the leading end of the sheet is detected. A rotary encoder is connected to the integrated impeller so that the position of the rotating blade can be detected.

When the tip of the paper crosses the optical axis of the photoelectric sensor,
The control unit reads the value of the encoder by causing a change in the sensor output and using this as a trigger. From the value and the arrival time of the sheet from the photoelectric sensor to the entrance of the stacking impeller, the stacking impeller rotation speed required for the sheet to be inserted into the insertion point of the groove is determined, and the control of the stacking impeller rotation speed is performed. I do.

In addition to the above control method, there is a second control method using the pitch of a paper sheet (note). In this method, a photoelectric sensor is arranged immediately after the take-out device, and the sensor output changes when a sheet crosses the optical axis of the sensor.

Thus, the passage timing of the leading end of the paper sheet is detected. The note pitch is measured by instrumenting the reference clock generated by the oscillator with a counter from the time when the leading edge of the sheet is passed to the time when the leading edge of the next sheet is passed.

The sheet pitch is stored in a memory. The rotation speed of the stacking impeller is changed when the tip of the paper sheet to which a photoelectric sensor with an optical axis that crosses the conveyance path separated by a standard pitch of the paper sheet from the entrance of the stacking impeller crosses is to be inserted. The change is determined as follows.

When the leading end of the sheet passes through the photoelectric sensor, the value of an encoder connected to the stacking impeller is read, and the position of the blade is measured. There is a certain width at the position where paper can be inserted into the stacking impeller, and among the rotation speeds of the impeller for inserting the paper within this width, the paper pitch after the paper to be inserted is set. A rotation speed that minimizes the considered evaluation function is selected.

The following example is shown as the evaluation function J. J = (control amount) ² + Σ (amount of variation in sheet pitch resulting from the control) ² More specifically, the evaluation function J _i of the i-th note is given by the following equation.

[0011]

(Equation 1)

[0012]

By the way, in the above, the position of the blade when the leading end of the sheet passes through the photoelectric sensor occurs at the same probability at any position. However, depending on the position of the blade, the rotation speed of the stacking impeller may have to be greatly changed in order to insert the paper sheet into the insertion point of the groove.

At this time, a large control torque is required for the stepping motor driving the integrated impeller. Thereafter, when the processing speed of the paper sheet is increased, the standard pitch of the paper sheet is shortened, and the time available for control is shortened.

Therefore, the control torque required for the motor driving the integrated impeller also increases. To perform high-speed integration operation, a high-speed, high-torque motor is required.
Increasing the capacity of the motor is undesirable because it leads to an increase in the size, weight, and cost of the apparatus (first conventional control method).

[0015] In the second conventional control method,
The same problem as described above occurs when the first inserted paper sheet passes through the photoelectric sensor at a position separated by a standard pitch from the entrance of the stacking impeller.

Also, since the rotation speed of the impeller is changed when the leading end of the paper sheet arrives at a position closer to the standard pitch from the entrance of the accumulation impeller, the paper sheet one sheet before that does not reach the entrance of the accumulation impeller. In this case, the insertion position of the paper sheet is not guaranteed.

In this control method, the setting of the evaluation function (setting of the control weighting coefficient for each sheet) is based on an empirical determination method based on a sheet conveyance test, and a method of changing the setting for each sheet pitch error pattern. It is shown.

In the former case, it is difficult to evaluate whether the set value is optimum, and the evaluation function may not be stable.
In the latter case, since the current rotation speed of the impeller is not taken into account in the pattern of the sheet pitch error, it is not necessarily optimal to reduce the control torque of the impeller drive motor.

In the first and second conventional control systems, one sensor is installed at a position separated by a predetermined distance from the stacking entrance, and the rotation speed of the impeller is determined only by the timing at which the sheet passes therethrough. The cause of the above problem is that the control is performed.

In view of the above, the present invention has been made in view of the above points, and has a plurality of sensors arranged on a conveyance path, and a sheet pitch, a rotation speed of an impeller, and blade position information are measured in advance. By performing the integration operation using the result, it is possible to reduce the rotation speed fluctuation of the integration impeller drive motor and prevent an increase in the control torque, thereby reducing the size and cost of the device. It is an object of the present invention to provide a paper sheet processing apparatus which can be achieved.

[0021]

A paper sheet processing apparatus according to the present invention.
The paper supply means supplies paper sheets one by one,
Conveying means for conveying the paper sheets supplied by the means;
It has several blades, and the above blades and blades rotate
Between the paper sheet and the paper sheet to be conveyed
The impeller to be guided and the paper sheets guided by the impeller
A stacking unit for stacking
At predetermined intervals in the direction, and
At least two detecting means for detecting the fed sheets
And the impeller based on the detection results of these detecting means.
From the impeller and the other from the impeller
To the detecting means and the paper sheet by the conveying means
The paper sheet is detected by each of the detection means from the
Measures the time taken to reach the impeller from the location
Measuring means, and the blade
It is necessary for the above paper sheets to enter between the blades of the car.
A calculating means for determining the rotation speed of the impeller
According to the rotation speed of the impeller obtained by the calculation means,
Control means for controlling the rotation speed of the impeller.
Has been established.

[0022]

[0023]

[0024]

[0025]

According to the paper sheet processing apparatus of the present invention as described above, a plurality of sensors are arranged on the transport path, and the paper pitch, the rotation speed of the impeller, and the blade position information are measured in advance, and the result is obtained. By performing the integration operation by using the above, it is possible to reduce the fluctuation of the rotation speed of the motor for driving the integration impeller, thereby preventing an increase in the control torque, and achieve a reduction in size and cost of the apparatus. be able to.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an example of the overall configuration of a sheet discriminating apparatus (sheet processing apparatus) to which the present invention is applied. The paper sheet discriminating apparatus includes a take-out unit 1, a transport discriminating unit 2, a sorting unit 3, and a stacking unit 4.

The paper sheets 10 are transported upward on the paper feed table 14 in a stacked state, separated one by one by the take-out rotor 11, and fed into the transport path 20 constituting the transport determination unit 2.

A discriminating section (not shown) is arranged on the transport path 20, and discriminates one sheet at a time. The stacking unit 4 is divided into a first stacking unit 4a and a second stacking unit 4b, and the transport direction of the paper sheet 10 is sorted according to the result of the determination.

The sorting is performed by a sorting gate 31 provided on the transport path 20. Each stacking device unit 4a, 4b of the stacking unit 4 is provided with a stacking impeller 41,
Receiving and stopping the paper sheet 10 conveyed at high speed,
Collect again.

Photoelectric sensors 51 for checking passage of the paper sheet 10 are provided at several places on the transport path 20. The photoelectric sensor 51 is used for taking out the paper sheet 10, confirming insertion into the passage stacking unit 4 on the transport path 20, and calculating the paper sheet pitch and the paper sheet transport speed.

Here, the sheet pitch is an interval between the leading ends of the sheets (notes) conveyed adjacent to each other. FIG. 2 shows a configuration example of the stacking unit 4.

The integrated impeller 41 includes a stepping motor 42
Is driven to rotate. The rotational position of the accumulation impeller 41 is monitored by a rotary encoder 43, and this data is transmitted to an impeller controller (described later).

The accumulation entrance sensor 45 monitors whether or not the leading end of the paper sheet (coupon) conveyed by the conveyance path 20 has passed. The ticket conveyed by the conveying path 20 is inserted into a groove between the blades of the stacking impeller 41 and decelerated, and then scraped out from the groove by the scraping plate 44 to be collected by the stacking box 4.
6 are integrated.

FIG. 3 shows an example of the configuration of the impeller control unit. The control computer 100 transmits an operation command for instructing start and stop of rotation of the impeller 41, initialization, and the like, receives a notice of operation completion of the stacking impeller 41 by the operation command, and sets a sheet insertion position after the stacking operation is completed. , The integrated data such as the impeller rotation speed and the sheet pitch are received.

The integration master 101 is the control computer 10
0 and relay the communication between the impeller controller 102. The impeller controller 102 starts, stops, and initializes the rotation of the impeller 41 in accordance with an instruction from the control computer 100, stores the accumulated data in a memory, and transmits the accumulated data after the end of the accumulation operation.

The plurality of sensors 21 and error in an integrated impeller rotation
Using the information from the encoder 43 , the impeller control 102 calculates the impeller rotation speed so that the sheet is inserted into the groove of the stacking impeller 41, and controls the stepping motor 42 based on the result. I do.

In the present invention, two control modes are prepared for controlling the rotation speed of the stacking impeller, and the control is performed by switching the modes according to the paper sheet conveyance status. FIG.
FIG. 1 is a schematic diagram showing the state of transporting a paper sheet.

The paper sheet 10 is transferred to the transport path 20 by 10 _-a , 10 _-b ,
... The order is 10- _e . At this time, the paper sheet 10 _-a is the first paper sheet inserted into the transport path 20,
_-b and 10 _-c are continuously _supplied .

The input and transfer timing is delayed by 10- _d and the input and transported 10- _e is continuously input and transported because the input and transfer timing is delayed due to, for example, a take-out mistake in the extraction rotor 11. Here, the transport status of the paper sheet is classified into two types.

One is the case where the sheet is first fed and conveyed to the conveyance path as in 10 _{-a, and} the case where the sheet is fed and conveyed with a delay in the conveyance timing as in 10 _-d and the other is 10 _-b ,
This is the case of paper sheets continuously fed and conveyed, such as 10 _-c and 10 _-e .

In the former case, the first control mode is used, and in the latter case, the integrated impeller rotation speed control method of the second control mode is used. FIG. 5 is a schematic view showing the arrangement of sensors for checking the transport status of a paper sheet.

The n sheets of paper transport check sensors 21 are arranged at predetermined intervals on the transport path 20 from the take-out unit 1 to the stacking unit 4, and whether the leading edge of the paper sheet has passed by each sensor is checked. Checking whether or not.

The position of the sensor 21- _i for checking the sheet conveyance is determined by the distance L _i (i = 1 to 1) from the stacking entrance sensor 45.
n). In paper pitch paper sheet transport check sensor 21 _-1, and is measured as the time from the paper sheet tip passage to the next of the paper tip passage, the measurement results are stored in the memory of the impeller controller 102.

The selection of the stacking impeller rotation speed control mode is performed based on the number of sheets passing through the respective sheet conveyance check sensors 211 _-n and information on sheet conveyance including the sheet pitch. FIG.
3 shows a flowchart of the sheet picking and stacking operation.

The order of accumulation, transportation, and removal (step S
The operation starts at (1, S2, S3). When the removal of the sheet starts, the impeller controller 102 selects the impeller rotation speed control mode from the signal from the sheet conveyance check sensor 21 _1-n and the information of the sheet conveyance, and the sheet enters the groove of the impeller. The impeller rotation speed is controlled to be inserted (step S
4, S5, S6).

When the removal of the paper sheets is completed, it is confirmed that the last paper sheet has been accumulated, and then the removal operation, the conveyance path operation, and the rotation of the impeller are stopped (steps S7 and S8). FIG. 7 shows the shape of the stacking impeller and the range in which paper sheets can be inserted.

The accumulation impeller 41 has 12 blades, and the shape of the groove of the blade is an involute curve. The insertion position of the sheet is the angle θ (rad) measured clockwise from the tip of the blade 41- _a at the position when the tip of the sheet reaches the outer periphery of the impeller.
It represents.

At this time, the range of θ _L < θ < θ _{H is} the position where the sheet can be inserted, the range of 0 < θ <θ _L is forward, θ _H <θ <A.
Is defined as the rear. θ _L and θ _H (rad) are determined by the speed at which the sheet enters the impeller, the angle of entry, the shape of the sheet, the shape of the impeller, the rotation speed, and the like. The value is set so that the rear end of the leaf is not hit by the blade 41- _b .

FIG. 8 is a flowchart of the control of the rotation speed of the stacking impeller for the first inserted paper sheet in the first control mode. Here, K represents the order of arrangement of the sheet conveyance check sensors 21 _{1-n from} the take _- out unit 1 to the stacking unit 4 (see FIG. 5).

As described above, the n-sheet transport check sensors are arranged n. At the time of START, the impeller 41 has already been rotated, and the rotation speed at this time is determined by the sheet take-out pitch determined by the take-out unit 1 and the number of blades of the stacking impeller 41, and the pick-up is performed continuously. When the number of blades is N [sheets] and the take-out pitch is P (s), the blade rotation speed W (rad) is the rotation speed required for inserting the inserted paper sheet into the groove between the blades that has become one by one.
/ S) is represented by W = 2π / (NP).

Using the rotary encoder 43 (FIG. 2), the position of the blade of the impeller at the time when the leading end of the first sheet inserted into the conveyance path has passed the sheet conveyance check sensor 21 _-1 (FIG. 5). Detection and measurement are performed (steps S11 and S12).

A sheet transport check sensor 2 from the stacking entrance
1 distance to _-1 L ₁ than the conveying speed of the paper that is set in advance (Fig. 5) and the conveying path, seen time until sheet reaches the integrated inlet.

[0053] From this time and the position of the current blade, impeller rotational speed W _r required to insert the paper into the insertion range of the impeller is determined (step S13). Here, when changing the rotation speed of the impeller, the current rotation speed W of the impeller is
If the difference between the rotational speed W _r to ₀ and change is large, it would be required a large driving torque to the stepping motor 42 (FIG. 2) for driving the impeller.

The maximum drive torque that can be generated in the stepping motor 42 is determined. If the stepping motor is driven beyond this, the motor will cause a misstep or the like, and the desired control cannot be performed.

[0055] Therefore, to change the to multiplied by a gain factor G _K to the difference in rotational speed W _r and the current rotational speed W _O required amount plus the current rotational speed W _O rotational speed WCNT (step S14).

The gain coefficient G _K can be set to a different value for each sheet transport check sensor. Coefficient G _K
Must be set so that the maximum driving torque is not exceeded when the stepping motor is driven, and that the paper is finally inserted into the insertable range of the stacking impeller.

Here, as an example, the gain coefficient G _K (G _K ) is inversely proportional to the distance from the accumulation entrance to the conveyance check sensor, and the gain coefficient G _K becomes 1 in the conveyance check sensor 21 _-n (FIG. 5). = L _n / L _K ). According to the gain coefficient G _K , when the paper sheet is far from the stacking inlet, the rotation speed fluctuation of the impeller is kept small in consideration of the possibility that disturbance such as the fluctuation of the paper sheet conveyance speed may be caused after that, and the waste is reduced. It is thought that the possibility of disturbance becomes lower as the paper approaches the stacking entrance while avoiding any speed fluctuations, so the rotation speed fluctuation amount is increased, and finally the papers are collected by the impeller. It can be inserted within the insertable range (step S15).

The above control is performed for each sheet transport check sensor, and the control is terminated when the leading edge of the sheet has passed the stacking entrance sensor 45 (FIG. 2) (step S16). Also, the paper sheet 10 _{-d in} which the pitch with the previous paper sheet is widened (FIG. 4)
Is controlled when the leading edge of the previous sheet 10- _c (FIG. 4) crosses the stacking entrance sensor from the sensor for checking the sheet transport that the leading edge of the sheet 10- _d (FIG. 4) passes next. Take control.

FIG. 9 shows a flowchart of the control of the accumulation impeller rotation speed in the control mode 2. Here, K represents the order of the paper sheets inserted into the conveyance path, and FIG. 9 shows that K = 2 assuming that the second paper sheet is continuously input after the first paper sheet is input into the conveyance path. Has started to control.

The sheet to be controlled is the K-th sheet. (K-1) The rotation speed of the impeller, the position of the blade, and (K-1)
-1) Sheet K and K-th sheet, K-th sheet and (K
+1) The time interval between the K-th sheet and the (K +) sheet when the blade continues to rotate at the current blade rotation speed using the time interval between the K-th sheet
1) Calculate the expected insertion position of the second sheet (step S)
21, S22, S23).

The expected insertion position is calculated as follows. FIG.
FIG. 0 shows a schematic view of the expected insertion position of the paper leaf tip. Where β
₀ (rad) is the insertion position of the leading end of the (K-1) th sheet,
β ₁ and β ₂ (rad) are the expected insertion positions of the leading ends of the Kth and (K + 1) th sheets.

The pitch of the (K-1) th sheet and the Kth sheet is T ₁ (sec), the pitch of the Kth sheet and the (K + 1) th sheet is T ₂ (sec), and the current blade Set the vehicle rotation speed to W ₀ (r
ad / sec), and one pitch angle of the blade is A (rad), β ₁ = β ₀ + W ₀ × T ₁ −A, and β ₂ = β
_{0 + W 0 × (T 1} + T 2) becomes a -2A.

[0063] However, if the (K + 1) th or if spacing sheet is not present is free wide T ₂ are the standard paper sheet pitch (Fig. 10). The expected insertion position pattern of the paper sheet is generated based on which of the three ranges (front, insertable, and rear) shown in FIG. 7 contains β ₁ and β ₂ obtained here. (Step S24).

In this pattern, each of β ₁ and β ₂ is 3
In order to classify the number of sheets into three, 9 patterns are obtained by raising to the power of 3 (where n is the number of paper sheets for which the expected insertion position is obtained), the number of patterns becomes 3 ⁿ .

When the K-th sheet is continuously rotated at the rotation speed among the impeller rotation speeds at which the K-th sheet is inserted into the insertable range, the (K + 1) th sheet can be inserted. The rotation speed is selected so as to be inserted into or in the vicinity thereof, and the rotation speed of the impeller is changed (step S2).
5, S26).

FIG. 11 shows an example of the expected insertion position pattern of the paper sheet into the impeller and the control of the impeller rotation speed. When beta ₁ and the beta ₂ is within the insertable range both the impeller rotational speed to keep the current rotational speed without changing.

When β ₁ is forward and β ₂ is within or behind the insertable range, the rotation speed is set so that the K-th sheet is inserted at the position of θ _L. beta ₁ is when the rear beta ₂ is the front or insertable range for the rotation speed to be inserted to the position of the K-th paper theta _H.

Β ₁ is forward or within the insertable range,
If β ₂ is forward, the (K + 1) th sheet of the rotation speed for inserting the Kth sheet into the insertable range is θ _L
The rotation speed is set at a position close to.

If β ₁ is backward in the insertable range and β ₂ is backward, the (K + 1) th sheet of the rotational speed of inserting the K-th sheet into the insertable range is θ. _The rotation speed is set at a position close to _H.

Then, when the above control is performed on all the sheets, the control is terminated (step S27). According to the integrated impeller rotation speed control device of the present invention as described above, the rotation speed fluctuation of the impeller is selected by selecting the rotation speed control method of the integrated impeller in response to a change in the paper sheet conveyance condition. Therefore, the maximum driving torque required for the impeller driving motor can be kept low.

In addition, the control of the rotation speed of the stacking impeller for the paper sheet initially fed into the conveyance path or the paper sheet whose distance from the previously input paper sheet has widened is controlled from a position distant from the stacking entrance. A long time can be used for control to start, and the maximum control torque of the integrated impeller drive motor can be reduced.

Further, for continuous paper sheets, the current control amount can be determined by taking into account the future control amount by dividing the pattern according to the expected insertion positions of a plurality of paper sheets. Therefore, the maximum control torque of the motor for driving the integrated impeller is determined. Can be reduced.

Further, by setting the number of paper sheets for calculating the expected insertion position to n and classifying the pattern into 3 ⁿ patterns, the control program can be simplified and the time required for the calculation can be shortened.

[0074]

Therefore, according to the present invention, as described in detail above, a plurality of sensors are arranged on the transport path, and the sheet pitch, the rotation speed of the impeller, and the blade position information are measured in advance. By performing the integration operation by using, the rotation speed fluctuation of the integration impeller driving motor can be reduced to prevent an increase in the control torque, and as a result, the size and cost of the device can be reduced. The paper processing place that I got
It is possible to provide a processing device . In addition, the transport means
In the middle part, a small number provided at predetermined intervals in the transport direction
One from the impeller based on the detection results of the two detection means.
To the other detection means and the other detection from the impeller
The distance to the means and the transport of the paper sheet by the transport means
From the speed, the sheet was detected by each of the detecting means.
Measure the time it takes to reach the impeller from the location and
From the measurement results of above, the paper between the impeller blades
Calculate the rotation speed of the impeller required for the leaves to enter.
Of the impeller according to the rotation speed of the impeller.
By controlling the rolling speed, the impeller blades
Paper sheet processing station that allows the paper sheets to enter between
Processing equipment can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a paper sheet discriminating apparatus to which an embodiment of the present invention is applied.

FIG. 2 is a detailed configuration diagram of an accumulation unit in FIG. 1;

FIG. 3 is a block diagram of an impeller control unit according to the present invention.

FIG. 4 is a schematic view of a paper sheet conveyance state according to the present invention.

FIG. 5 is a schematic diagram of a sheet conveyance check sensor device according to the present invention.

FIG. 6 is a flowchart of paper sheet taking out and stacking operations according to the present invention.

FIG. 7 is a detailed view of an integrated impeller according to the present invention.

FIG. 8 is a flowchart of control mode 1 according to the present invention.

FIG. 9 is a flowchart of control mode 2 according to the present invention.

FIG. 10 is a schematic diagram of a predicted insertion position of a paper leaf tip according to the present invention.

FIG. 11 is a diagram showing an example of a predicted sheet insertion position pattern according to the present invention.

[Explanation of symbols]

4a: first stacking unit, 4b: second stacking unit, 10: sheet, 11: take-out rotor, 14 ...
Paper feed table, 20: conveyance path, 31: division gate, 41: accumulation impeller, 42: stepping motor, 43: rotary encoder, 44: scraping plate, 45: accumulation entrance sensor,
46: accumulation box, L _i : distance (i = 1 to n) from the accumulation entrance sensor 45 to the paper sheet conveyance check sensor 21- _i , 5
1. Photoelectric sensor.

Claims (3)

(57) [Claims] 1. A supply means for supplying sheets one by one , and a transporter for transporting the sheets supplied by the supply means.
A step and a plurality of blades, the blades and the blades
Enter the above-mentioned conveyed paper between the root and the predetermined direction
And a stacking unit for stacking paper sheets guided by the impeller
At a predetermined interval in the conveyance direction in the middle of the conveyance means.
Is detected, and the paper sheet conveyed by the conveying means is detected.
Based on at least two detection means and the detection result of each of these detection means,
The distance to one detecting means and the other
Distance to the knowledge means and conveyance of the paper sheet by the conveyance means
From the feeding speed, the paper sheet is detected by each of the detecting means.
Measure the time it takes to reach the impeller from the place
Measuring means, from the measurement result of the measuring means,
Of the impeller required to allow the paper sheets to enter during
Calculating means for determining the rotational speed, and the rotational speed of the impeller determined by the calculating means.
Therefore, control means for controlling the rotation speed of the impeller and
A paper sheet processing apparatus comprising: 2. The calculation means according to claim 1, wherein
From the fruits to obtain the tip passage time for multiple sheets,
The time required to pass the leading edge of the acquired sheets
By performing certain calculations, the impeller blades and blades
The rotation speed required to enter the paper
The paper sheet processing apparatus according to claim 1, wherein
Place. 3. The computer according to claim 1, wherein the calculating means is configured to control the operation of the impeller based on
The distance to the detection means that detected the leaves and the above impeller
Based on the ratio to the distance to the detection means closest to the impeller
3. The paper sheet according to claim 2, wherein the calculation is performed.
Type processing equipment.