JPH02106535A - Paper sheet gathering and stacking device - Google Patents

Abstract

PURPOSE:To prevent jam even when paper sheets are carried diagonally or one over another in an abnormal posture, or even when nonstandardized paper sheets are conveyed by providing a drive control circuit for controlling drive of a rear stage conveying path based on a signal from a passing detecting means provided on a front stage conveying path. CONSTITUTION:When two paper sheets are sent out from a front stage conveying path 1 with a part of each paper sheet overlapped, the two paper sheets are carried to a rear stage conveying path 6 with a fixed amount of overlapping being held after the rear stage conveying path 6 starts since the rear end of the first paper sheet and the front end of the second paper sheet are not detected by a photosensor 5, and the rear stage conveying path 6 is stopped at a position where collision of the rear end of the second paper sheet is difficult to occur by detecting the rear end of the second paper sheet. When a twice-folded paper sheet is sent out from the front stage conveying path with its length in the direction of conveyance held in one-half the normal length, a fixed amount of overlapping with a preceding paper sheet is obtained similarly, and the rear end of the twice-folded paper sheet is stopped at a position where collision is extremely difficult to occur. Collision of the paper sheets thus does not occur at a delivery part between both stage conveying paths, and a stacking operation of least jam can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stacking device for paper sheets, and particularly to a stacking device for stacking paper sheets, and particularly for stacking paper sheets in a skewed manner (
The present invention relates to a paper sheet stacking device that can stably stack paper sheets even when there is an abnormal conveyance such as skew, double feed, or cycle abnormality, or when there are variations in the length of conveyed paper sheets.

[Conventional technology]

Conventionally, this type of apparatus includes a sheet overlap type stacker that stacks paper sheets while partially overlapping them in a conveyance path.

This device is described in Japanese Patent Application Laid-Open No. 60-27092,
By optically detecting banknotes that are conveyed at approximately equal intervals,
The sheets are intermittently fed one by one by a specified number of pulses, and then some of the sheets are overlapped. In other words, it was a mechanism for sheet overlap stacking.

[Problems to be Solved by the Invention] However, the above-mentioned conventional technology is not suitable for cases where a part of a sheet is skewed from the previous conveyance path or conveyed in duplicate, or when there is a standard problem among the sheets to be handled. No consideration is given to the case where something other than paper sheets is being conveyed.

In other words, when these items are being conveyed, if the rear conveyance path is sent a certain amount based on the front edge passage signal of the sheet, the position of the trailing edge of the sheet when the rear conveyance path stops will be the normal position. Unlike the case of paper sheets, there is a problem in that the trailing edge of the preceding banknote remains near the delivery end and jams are likely to occur.

Furthermore, if the trailing edge passage signal is used to send a certain amount of paper to the rear conveyance path, there is a problem in that when the leading edge of the paper sheet reaches the rear conveyance path, the latter conveyance path has not yet been activated and jams are likely to occur. Ta.

Furthermore, when the length of the paper sheet is smaller than a typical standard paper length, if a certain amount of paper is sent to the rear conveyance path based on the leading edge passage signal, the trailing edge of the preceding paper sheet and the following paper sheet will be There was a problem in that the leading edge of the paper collided with the other paper sheets, causing subsequent paper sheets to jam.

An object of the present invention has been made to solve the above-mentioned problems. Even when paper sheets in an abnormal position such as skewed or double-fed, or sheets other than standard sheets are conveyed, the paper sheets can be easily jammed. The purpose of the present invention is to provide a paper sheet stacking device that is not suitable for use.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a paper sheet stacking device which has a front-stage conveyance path and a rear-stage conveyance path and stacks conveyed paper sheets in a sheet overlap shape. A passage detection means for detecting skew feeding, double feeding, or cycle abnormality of paper sheets to be delivered is provided in the first stage conveyance path, and a drive control circuit is provided for controlling driving of the second stage conveyance path based on a signal from the detection means. It is characterized in that the passage detection means and a drive control circuit control the drive of a paper sheet forced fall means provided at or near the delivery section of the paper sheet input and accumulation mechanism. It is characterized by its use in circuits.

Then, a photosensor for optically detecting skew, weight, 1, or cycle abnormality of the paper sheets being conveyed is placed on the upstream side of the delivery section of the pre-stage conveyance path where the paper sheets are sent out. A plurality of sensors are provided perpendicularly to the conveyance direction, and based on the signal of the sensor that detects dark first among the sensors, the drive of the second stage conveyance path is started, and the drive of the second stage conveyance path is started based on all the light signals of the sensor. The present invention is characterized in that it includes a drive control circuit that stops driving the road.

[Effect]

With this configuration, even when sheets are being conveyed in poor conveyance conditions, such as skewed sheets or double-fed sheets, the latter conveyance path will detect the leading edge of the sheets first among the multiple sensors installed. It starts when the leading edge of one paper sheet reaches a certain position based on the detected sensor signal, and the subsequent conveyance path is stopped when the trailing edge of the paper sheet reaches a certain position based on the sensor signal that last detects the trailing edge of the paper sheet. It stops at a fixed position where it is least likely to collide with the front end of the paper sheet, and at this time, the front end of the paper sheet is always held between the rear transport path by limiting the transfer distance of the receiver. Therefore, these sheets are sent to the subsequent conveyance path with a constant amount of sheet overlap without colliding with each other at the ends of the sheets, so that jams do not occur and the sheets are in a stable sheet overlap state. Paper leaves can be accumulated.

〔Example〕

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

FIG. 1 shows an embodiment of the present invention. Reference numeral 1 denotes an earlier conveyance path for conveying paper sheets 2a one by one at intervals. Each belt is held and conveyed by a pulley 4a.

4b, and the pulleys 4a, 4b are rotated at a constant speed by a drive motor (not shown). Near the rear end of the conveyance path 1 at the front stage, there are two photosensors 5a and 5b for detecting paper sheets.
There are several. The set positions of the photosensors 5a and 5b function as drive control reference points for the later-described transport path.

Paper sheets 2b and 2c in which some of the sheets overlap.

The conveyance path 6 in the latter stage that conveys the material 2d is a bell h7a.

Paper sheets 2b, 2c, and 2d are held and conveyed by 7b,
Each belt is driven by pulleys 9a and 9b connected to a step motor 8 by a transmission mechanism (not shown).

The paper sheets sent out from the rear conveyance path 6 are stored in the storage box 1.
It is stored in o.

The front conveyance path 1 is provided with a brush wheel 11 that rotates coaxially and in the same direction as the pulley 4b and has brushes embedded in its circumference.

The distance between the paper sheet delivery point 12 of the front-stage conveyance path 1 and the paper-sheet clamping start point 13 of the rear-stage conveyance path 6, that is, the transfer distance for paper sheet receiving, is half the width of the regular paper sheet. The front-stage conveyance path and the rear-stage conveyance path 6 are arranged so that the number is 1 or less. Note that reference numeral 14 represents a pulley, and 15 represents a brush.

Whether the paper sheet being conveyed is skewed or not is determined by the time difference between the two sensors when the sensor signal changes from light to dark, and in the case of double feeding, the level of the amount of transmitted light per sheet. You can also tell by the changes.

In the case of complex conditions such as when skew feeding and double feeding occur at the same time, it becomes difficult to judge.Therefore, in this embodiment, although the sensor configuration is simple, by using the control method described later, 9 skew feeding and double feeding are possible. Even in the case of 9-cycle abnormality, or in the case of a combination of these, it is indirectly determined and processed.

The latter conveyance path 6 is driven by a stepping motor 8 that is controlled based on signals detected by photosensors 5a and 5b. This control method will be explained in detail with reference to FIG. For example, when the front end of a paper sheet 2a that has been fed diagonally passes through the photosensors 5a and 5b, the photosensor 5a side detects the front end of the paper sheet first, and the output signal of this photosensor is in the light state. The state changes from to dark. This output signal 20 shown in FIG. 3 is used to start timer A 21 in the control section. This timer A
Calculated in advance by subtracting the time it takes for the step motor 8 to reach the target speed from the start of driving from the time it takes for the front end of a to be conveyed the distance from the photosensor 5 to the clamping start point 13 of the rear conveyance path 6. A time is set, and when the timer A reaches this time, that is, when the time is up, a motor drive start signal 22 is output, and the step motor 8 is started to be driven through the step motor drive driver 23. At this time, the driving speed of the step motor 8 is set so that the conveyance speed of the latter conveyance path 6 during driving is equal to or lower than the constant conveyance speed of the former conveyance path 1. On the other hand, the rear end of the paper sheet 2a that has come in diagonally is detected by the photo sensor 5.
When passing through, the photo sensor 5b side or the trailing edge of the sheet is detected last.

The output signal of this photosensor changes from a dark state to a light state. Using this output signal 24.

Start timer B 25 in the control section. This timer B has a photo sensor 5b at the rear end of the paper sheet 2a.
The time required for the step motor 8 to decelerate from the opening speed and stop is calculated in advance from the time it takes for the paper sheet 2b to be scraped down by the brush of the brush wheel 11 like the rear end 2b' of the sheet 2b. The calculated time is set,
When the timer B times out to this time, a motor spitting stop signal 26 is issued, and the step motor 8 is decelerated and stopped through the step motor drive driver 23.

For each paper sheet conveyed on the front conveyance path 1, the third
By repeating the control shown in the figure and controlling according to the control flowchart shown in Fig. 4, the paper sheets are conveyed on the latter conveyance path in a state where some of them overlap by a certain amount of overlap, that is, in a sheet overlap shape. Become so.

To explain the control flowchart in FIG.
Alternatively, for items that have been conveyed diagonally, after 32 "Stack stop instruction?" in the flowchart, 33
If YES, after processing 34 "Timer A start", 35
``Is the timer time up?'' Repeat steps 41, ``Detecting the trailing side of the trailing edge of paper sheets?'' and 35 until the timer times up. After that, if 37 "Do you detect the trailing side of the trailing edge of the paper sheet?" is YES, after processing 38 "Timer B start j," 39 "Is timer B time up?" Until the time is up, repeat steps 45, ``Detect the leading edge of the leading edge of the sheet?'' and 39. When the time is up, output the ``motor drive stop command'' of 40, and 33, ``Detect the leading edge of the leading edge of the sheet?''. Return to “Detect side?”
Repeat these controls.

On the other hand, if a short sheet of paper is being conveyed due to a folded sheet, after processing 33.34.

Since the trailing side of the trailing edge of the paper sheet is detected before timer A times up at 35 "Timer time up?", it processes 41.42 "Timer B start", and at 43 timer A times up. At that point, 44 "motor drive start command" is output.

After that, until timer B times up, 39.4
5 is repeated, and when the time is up, the "motor drive stop command" of 40 is outputted and the process returns to 33.

Furthermore, if the subsequent sheet is conveyed with a shorter sheet interval than the standard, that is, with a short feed,
Timer B time up? After J, process 45 "Detect the leading edge of the front edge of the paper sheet?J" and process 46 "Timer A start", and when 47 Timer B reaches time-up, 48 "Motor drive stop command" is output, and the process returns to step 35 to continue processing.

According to this embodiment, even when two sheets are sent out from the front conveyance path with no gap between them and some of them overlap, the rear conveyance path 6 is activated by detecting the leading edge of the first sheet. , the rear end of the first sheet and the front end of the second sheet are connected to the photo sensor 5.
Since the overlapping amount is not detected, the sheet is sent to the rear conveyance path 6 while maintaining the same amount of overlap, and when the trailing edge of the second sheet is detected, the rear conveyance path 6 detects that the rear edge of the second sheet collides the most. Stop in a position where this is unlikely to occur. In addition, one paper sheet is folded in half, and the length in the conveyance direction becomes half of the normal value, so that
Even when the folded paper sheet is fed out from the folded paper sheet, a certain amount of overlap with the preceding paper sheet is obtained in the same manner as described above, and the rear end of the folded paper sheet stops at the position where collision is least likely to occur. In this manner, the paper sheets do not collide with each other at the transfer section of the receiver between the two stages of conveyance paths, and stacking with less jamming is possible.

So far, we have described a photosensor that detects optically, but it is also possible to perform the same control using a feather-touch microswitch that detects a single mechanical quantity or a sensor that uses a piezoelectric element.

5 to 7 are diagrams showing the case where the piezoelectric element is used as a general application. In FIGS. 5 and 6, a driven roller 51 is rotatably attached to a driven roller shaft 53 and is provided in pressure contact with a driving roller 52. As shown in FIGS. A shim 55 and a piezoelectric body 54 are attached to the driven roller shaft 53 via a flattened bearing (not shown), and have a structure that bends in response to displacement of the driven roller shaft.

Therefore, when one paper sheet 2a is conveyed, the output voltage changes as the piezoelectric body bends as shown in the graph of FIG. 7, and the entry of the paper sheet can be detected.

In the case of double feeding, it can be determined from the fact that this output voltage level becomes high.

Note that the reference numeral 56 is a lead wire.

FIGS. 8 and 9 are examples in which the present invention is applied to other elements. These figures show the automated teller machine (ATM), which has become mainstream in recent years, in which banknotes are accumulated in the same safe so that deposited banknotes can also be used as payment banknotes.

This is an example in which the present invention is applied to the collection side of a device having a recycle box that can be fed out. Portions corresponding to the same structural parts as in FIG. 1 are indicated by the same symbols.

FIG. 8 shows that the banknotes between the front conveyance path 1 and the rear conveyance path 6 are made into a sheet overlapping shape at the transfer section, and then passed through the rear conveyance path 6 by a brush wheel 11 attached to the terminal end of the banknotes. It is a device that is loaded and accumulated. The control of the present invention can be applied to this device as is. In this case, the sensor is often a photo sensor, but since it is generally installed near the detection part where the mounting density is high, it is difficult to remove the sensor if it breaks down.
This causes inconveniences such as inconvenience in installation. Therefore, in this embodiment, the detection section includes the lenses 61a, 61b and the hospital motion control circuit 62.
For signal transmission, plastic optical fibers, which are inexpensive and easy to process, are used to improve reliability.

Detection of banknotes is performed by a semiconductor sensor 63 in the drive control circuit 62.
The infrared rays are emitted by the plastic optical fiber 64.
The infrared rays are transmitted through the lens 61a on the light-emitting side and emitted by the lens 61a on the light-emitting side, and the received light is passed from the lens 61b on the light-receiving side to the plastic optical fiber 64, and then the infrared rays are converted into electrical signals by the photocoupler 65, which is composed of an optical connector, a light-receiving element, etc. Same as sensor.

Can be detected in light and dark. The reference numeral 66 is a motor driver, and the reference numeral 67 is a banknote that has been deposited.

FIG. 9 shows a recycling box that does not have a downstream conveyance path and is equipped with a stacking device in which banknotes that have been conveyed for a certain period of time can be put into the storage box 10 as they are. In this device, when dispensing banknotes for payment after 4J5 stacks of banknotes, for example, it is desirable to shorten the processing time to this point as much as possible. Therefore, considering the miniaturization of the recycling box, the upper end surface of the stacked banknotes 67 when one banknote is stacked and the upper end surface of the banknote when the banknotes are fed out in the post-processing are moved up and down by a push plate on the lower surface of the stacked banknotes (not shown), and are kept at a constant level. However, it is better to minimize the difference in the position of the top end of the stacked banknotes in both cases.

Therefore, it is desirable that the upper end position of the banknotes when stacking banknotes is as high as possible in order to stack the banknotes in an orderly manner. The stacked banknotes that are in contact with the banknotes may be pulled out in the rotational direction, resulting in misalignment, which may become an obstacle when paying out banknotes in post-processing. Therefore, the brush wheel 11 only needs to be activated when banknotes are conveyed, and the control of the present invention can be applied. In addition, in FIG. 9, in order to make this possible, the pulley at the end of the conveyance path is an idle pulley 68, and the brush wheel 11 located laterally on the same axis
can be rotated independently by a step motor 8.

[Effects of the Invention] As described above, according to the present invention, the paper sheets being conveyed one after another from the previous conveyance path are skewed, double fed, and even regular standard sheets are Even if the paper sheets are of different lengths, there is no collision between the paper sheets, and the paper sheets are reliably sent to the subsequent conveyance path while partially overlapping, so that a paper sheet stacking device with fewer jams can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the configuration of an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, FIG. 3 is a configuration diagram of the operation control section of this embodiment, and FIG. A control flowchart explaining the operation control section, and FIGS. 5 to 7 show other embodiments using piezoelectric elements. FIG. 5 is a perspective view, FIG. 6 is a cross-sectional view, and FIG. 7 is an output voltage diagram. Graphs showing changes over time, and FIGS. 8 and 9 are cross-sectional views showing examples of application of the present invention. 1... Pre-stage conveyance path, 2... Paper sheets, 5...
Photo sensor, 6... Rear conveyance path, 8... Step motor, 11... Brush wheel, 54... Piezoelectric body, 62... Plastic optical fiber 68... Idle pulley.

Claims (1)

[Scope of Claims] 1. In a paper sheet stacking device that has a front-stage conveyance path and a rear-stage conveyance path and stacks conveyed paper sheets in a sheet overlap shape, the conveyed paper sheets are A passage detecting means for detecting skew feeding, double feeding, or cycle abnormality is provided in the first stage conveyance path, and a drive control circuit is provided for controlling driving of the second stage conveyance path based on a signal from the detection means. paper sheet stacking device. 2. The paper sheet stacking apparatus according to claim 1, wherein the passage detecting means is an optical detecting means such as a photosensor, a CCD image sensor, or an image pickup tube sensor. 3. The paper sheet stacking apparatus according to claim 1, wherein the passage detection means is a mechanical detection means such as a feather touch microswitch or a sensor using a piezoelectric element. 4. The apparatus according to claim 1, 2 or 3, wherein the passage detecting means and the drive control circuit are provided in a paper sheet forced drop means provided at or near a delivery section of the paper sheet input and accumulation mechanism. A paper sheet stacking device characterized in that it is used in a circuit that controls drive. 5. In a sheet stacking device that has a front-stage conveyance path and a rear-stage conveyance path and stacks conveyed paper sheets in a sheet overlapping manner, skewing and double feeding of the conveyed paper sheets can be avoided. Alternatively, a plurality of photosensors for optically detecting cycle abnormalities are provided on the upstream side of the delivery section of the front-stage transport path through which the paper sheets are sent out, perpendicular to the transport direction of the paper sheets; The invention is characterized by comprising a drive control circuit that starts driving the latter conveyance path based on a signal from a sensor that first detects dark, and stops driving the latter conveyance path based on all light signals from the sensor. paper sheet stacking device. 6. The paper sheet stacking device according to claim 5, wherein the photosensor transmits signals from the front and rear edge detection sections of the paper sheets to the control circuit using plastic optical fibers.