JPH0742031B2 - Paper sheet deposition equipment - Google Patents

Description

Description: (a) Technical Field The present invention relates to a paper sheet stacking device such as a banknote storage device of an automatic transaction processing device that stacks and stores input paper sheets.

(B) Summary of the Invention In the paper sheet stacking apparatus according to the present invention, when the paper sheets stacked on the lift are pressed upward by two different pressure values,
A change in the thickness of the paper sheet due to the difference in the pressing force, that is, a means for measuring the height difference of the lift, and a means for determining the optimum position of the lift for feeding the paper sheet based on this height difference,
And a means for lowering the lift to that position, eliminating a jam when inserting a paper sheet.

(C) Conventional Technology and Its Deficiencies FIG. 4 shows a bill storage device of an automatic transaction processing device, which is an example of a paper sheet stacking device that has been conventionally used. The lift 1 for depositing banknotes in the case 2 is composed of a base 1a and an arm 1b, and the lift 1 is driven along a rail 3 by a belt 4. A roller 7 is arranged on the side of the upper end of the case 2, and the bills are placed on the base 1a by driving the roller 7.
Thrown on.

In order to insert the bills by the roller 7 without error, it is necessary to keep the error from the roller 7 to the upper end of the bills already accumulated to an appropriate length. That is, when the head is too small, the tip of the banknote ejected by the roller 7 may collide with the banknote already accumulated during the ejection to cause jamming of the banknote, and the head is too large. In this case, since the falling distance is long, the inserted banknotes fall in the vertical direction, and in this case also, the banknotes may be jammed.

Therefore, in order to maintain an appropriate head between the roller 7 and the upper end of the banknotes already deposited, the platform for depositing the banknotes is configured by the lift 1 so as to be movable up and down, and the banknotes deposited are stacked. It is configured to move up and down according to the height of.

Here, in order to perform proper control, it is necessary to accurately detect the position of the upper end of the accumulated banknotes.
The banknotes have creases, wrinkles, and the like while they are used, and the thickness when accumulated is not constant. Therefore, the height of the accumulated banknotes cannot be accurately calculated from the number of accumulated banknotes. In order to solve this and accurately detect the position of the upper end of the bill, the following detection methods have been conventionally proposed.

(1) Install a reflective optical sensor above the lift,
The position of the upper end is detected by the intensity of the light reflected at the upper end of the accumulated banknotes.

(2) A transmissive optical sensor is installed at a predetermined position that crosses the case 2 at a position with an appropriate drop from the roller 7, and when the accumulated bills block this optical sensor, the upper end of the bill reaches a predetermined position. Detect that you came.

(3) A mechanical switch that is turned on by depositing banknotes is installed at the predetermined position, and when the switch is turned on, it is detected that the upper end of the banknote has reached a predetermined position.

Further, without detecting the position of the upper end of the accumulated banknotes, (4) a claw is provided in the case 2, and the banknote is pushed down by the claw every time the banknote is inserted, and the roller 7 (insertion section) and the banknote are forcibly pushed. Leave a specified gap between the upper edge of and.

However, since the optical sensors are used in the methods (1) and (2), there is a problem in the reliability of the detection output due to paper dust and the like, and in the mechanical methods (3) and (4). Since the structure becomes complicated, there is a problem in mechanical reliability and an increase in cost cannot be avoided.

On the other hand, apart from the above method, a contact sensor is installed at the same height as the upper roller 7 of the lift 1, the lift 1 is raised every time a bill is inserted, and the upper end of the bills accumulated by this rise is the contact sensor. A method has also been proposed in which the lift 1 is stopped from rising when it comes into contact with the. However, since the deposited banknotes are wavy due to folds, wrinkles, etc., contact detection becomes unstable, and accurate top end detection cannot be performed. Moreover, even if the lift 1 is raised, the deposited banknotes will not be removed. Since it is not compressed, the number of sheets that can be stored in the case 2 could not be increased.

(D) Object of the invention In view of the above drawbacks, the present invention minimizes the change in the mechanical structure of a banknote storage device that has already been put into practical use, and optimizes the upper end and the insertion section of banknotes stacked with a simple structure. It is an object of the present invention to provide a paper sheet stacking device capable of maintaining a high head.

(E) Configuration and Effect of the Invention The present invention relates to a lift capable of moving up and down for accumulating sheets fed from a feeding unit, a first pressure value and a first pressure value installed above the lift. A pressure sensor that detects a second pressure value that is also large, and the lift is raised or lowered, and the pressure sensor pressing force of the paper sheets accumulated on the lift becomes the first pressure value. A lift position and a height difference measuring means for measuring a height difference between the lift position when the pressure value reaches the second pressure value, and a pressure sensor corresponding to the height difference, from a position where a pressure sensor measures the second pressure value. A table that stores the amount of lowering of the lift until the drop from the input portion to the upper end of the paper sheet reaches a position suitable for paper sheet insertion, and when the height difference measuring means measures the height difference, Refer to the table for the height difference and And having means for lowering the door, the.

According to the present invention configured as described above, the lift for accumulating the paper sheets is raised, so that the accumulated paper sheets are once compressed upward. In this compression step or the step of lowering the lift after the compression, the height difference of the lift when the pressure sensor detects the first and second pressure values is measured. Based on this height difference, the distance for lowering the lift is determined by referring to the table.

The height difference is due to the number of accumulated paper sheets, folds, and swelling due to wrinkles. When the lift is lowered from the compressed state of the paper sheets to the state in which the paper sheets are uncompressed, the paper thickness is set in consideration of how much the compressed thickness (height difference) is restored. The lift descent distance for preparation must be determined. The descending distance of the lift is stored in the table in consideration of the restoration amount. By lowering the lift by the descending distance read out from this table, the paper sheet feeding unit and the accumulated paper sheets are stored. It is possible to keep the height difference with the upper end of. Further, since the operation of temporarily compressing the paper sheets upward is included during the detection operation, the accumulated paper sheets remain compressed to some extent even if the compression is released, and the paper sheets can be accumulated. The number of paper sheets can be increased.

(F) Embodiment A paper sheet storage device according to an embodiment of the present invention will be described with reference to the drawings. The same components as those of the conventional banknote storage device shown in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted.

A first pressure detection lever 16 and a second pressure detection lever 14 are swingably mounted coaxially with the roller 7. Protrusions 16a and 14a are formed above the tips of the first pressure detection lever 16 and the second pressure detection lever 14. When the first and second pressure detection levers 16 and 14 rotate upward, the protrusions 16a and 14a
Photosensors 12 and 11 are installed at the positions where is moved. These photosensors 11 and 12 are connected to the sensor interface 18, and input an ON signal to the sensor interface 18 when the protrusions 16a and 14a block light. The sensor interface 18 is connected to a microcomputer 19, which is a control unit. First pressure detection lever
16 rotates downward due to its own weight, and rotates upward when a force equal to or greater than its own weight is applied from below.
Turn on 12. Further, at the tip of the second pressure detection lever 14, a detection roller 13 for smoothly rotating the lever is rotatably provided. Further, the second pressure detection lever 14 is biased by a spring 15 so that the tip of the lever rotates downward. Therefore, the first pressure value (P1) is a force for lifting the weight of the first pressure detection lever 16, and the second pressure value (P2) is the second pressure detection against the biasing force of the spring 15. It is a force for lifting the lever 14. Generally P1 ＝
100gw, P2 = 500gw is set. Photo sensor 11,1
The second pressure detecting lever 14, the spring 15, and the first pressure detecting lever 16 correspond to the pressure sensor of the present invention.

A pulse motor 8'is used as a motor for moving the lift 1 up and down, and the amount of lift of the lift 1 can be accurately measured by counting the number of pulses applied to the pulse motor 8 '. The microcomputer 19 controls the pulse motor 8'via the motor controller 20. The microcomputer 19 outputs a pulse for driving the pulse motor 8'to the motor controller 20 and counts the number of pulses.

The operation of the banknote storage device will be described with reference to the flowchart of FIG. Step n1 (Hereafter, simply refer to step ni
say ni. ), If one of the photo sensors 11 and 12 is turned on, it is determined that the upper end of the accumulated banknotes has already hit the upper end, and the lift 1 is lowered until the photo sensor 12 that detects P1 is turned off. (N2), the detection operation starts. Lift 1 until photo sensor 12 turns on and detects P1
Is raised (n3, FIG. 3 (A)), and lift 1 is raised while counting the number of rotation pulses of the pulse motor 8 '(n4). When the photo sensor 11 is turned on to detect P2 (n5), the lift 1 is stopped from rising and the counting of the pulse number is also ended (n6, FIG. 3 (B)).

This count value is a. a changes depending on the folds of the accumulated banknotes, gaps due to wrinkles, and the number of banknotes. Here, the larger the value of a, the larger the gap between the bills or the larger the number of bills. Therefore, it can be said that the compressed distance before reaching P1 is long. According to this, when the banknote is compressed until P2 is detected, the amount of restoration of the thickness when the compression is released also becomes large. This restoration amount is h (h ₁ to h ₅ )
Is approximated by. Assuming that the ideal head from the roller 7 to the upper end of the accumulated paper sheets is H, the lift 1 is raised until P2 is detected, and then the actual head from the roller 7 to the upper end of the paper sheets is H. The descending distance H ′ of the lift 1 for
Can be obtained by H '= H + h.

The following table is a table for obtaining the restoration amount h from the pulse number a.

Here, it is _{a 1 <a 2 <a 3} <a 4 <a 5 <a 6 0 <h 1 <h 2 <h 3 <h 4 <h 5.

Since the value of h can be easily obtained by an experiment, it suffices to set an appropriate numerical value for a _{1 to} a ₆ to create the above table.

H is read by referring to the above table with the pulse number a at n7 of the Float. By calculating H'at n8 and lowering the lift 1 by H'at n9, it is possible to maintain the optimum head between the upper end of the accumulated banknotes and the roller 7 (Fig. 3 (C)). n4 corresponds to the height difference measuring means of the present invention, and n7
~ N9 corresponds to the "means for lowering the lift by referring to the tail at a height difference" of the present invention.

Although P1 and P2 are measured in the process of raising the lift 1 in the above embodiment, P1 and P2 may be measured in the lift lowering process after once being compressed. In this case, since the pressure value is detected after being compressed once, the value of h is different from the above table and approximates to the descending distance according to the pulse number a.

[Brief description of drawings]

FIG. 1 is a flow chart showing the operation of the banknote storage device according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the above embodiment, and FIGS. 3 (A), (B) and (C) are the above embodiments. FIG. 4 is a diagram showing a stacking bill upper end detection operation of FIG. 4, and FIG. 4 is a schematic configuration diagram of a conventional bill storage device. 8 '... Pulse motor, 11,12 ... Photo sensor, 14 ...
… Second pressure detection lever, 15 …… Spring, 16 …… First pressure detection lever,

Claims (1)

[Claims] 1. A lift capable of moving up and down for accumulating paper sheets input from an input section, a first pressure value installed above the lift, and a second pressure value larger than the first pressure value. And a lift position when the lift is raised or lowered, and the pressure sensor pressing force of the paper sheets accumulated on the lift reaches the first pressure value, and a second Height difference measuring means for measuring the height difference with the lift position when the pressure value is reached, and the height sensor corresponding to the height difference, from the position where the pressure sensor measures the second pressure value, from the input section to the paper sheet. A table that stores the amount of lowering of the lift until the height difference to the upper end of the sheet reaches an appropriate position for inserting paper sheets, and when the height difference measuring means measures the height difference, refer to the table with the height difference. And means for lowering the lift, Sheet deposition device comprising a.