JPH08208053A - Paper sheet delivery device - Google Patents

Abstract

PURPOSE: To provide a paper sheet delivery device ensuring paper sheets to be delivered one by one, even when sheets superposed on top of each other are fed after a spell of sheet-free conditions at a gate. CONSTITUTION: A paper sheet delivery device has a delivery roller 2 actuated with a sheet delivery motor 1 for applying a transfer force to paper sheets, a gate 4 formed in space between the roller 2 and a reversing roller 3 above, and a reversing motor 5 reversed under torque smaller than frictional torque between the paper sheets and the roller 2, but larger than friction between each sheet. Regarding the device so formed, a paper sheet detection means 6 is laid in the vicinity of the gate 4 for detecting the existence of the paper sheets. According to this construction, the motor 1 drives the roller 2 at a slow speed, when a delivery process starts and, then, at a high speed when the means 6 detects a paper sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeding device for paper sheets such as banknotes, and more particularly to a friction between the paper sheets which is smaller than a friction torque between the feeding means for giving a conveying force to the paper sheets and the paper sheets. The present invention relates to a paper sheet feeding device having a separating means that is driven in reverse by a torque larger than the torque.

[0002]

2. Description of the Related Art As a feeding device as described above, there is a conventional device described in, for example, Japanese Patent Publication No. 61-44784. The structure of the paper sheet feeding device described in this publication is, as schematically shown in FIG. 7, feed rollers b and c made of friction members that generate a conveyance force for the paper sheet a, and the feed rollers b and c. A group of stacked paper sheets is provided with separation rollers d and e that are in pressure contact with the separation rollers d and e, and intermediate rollers f and g that are in contact with the separation rollers d and e and that are driven in the opposite direction to the feed rollers b and c. In this case, the sheet a is separated and conveyed one by one. At that time, the friction torque transmitted from the separation rollers d and e is Tm, and the separation rollers d and e are separated from the feed rollers b and c by one sheet. When the friction torque transmitted through the paper sheets of No. 2 is Tp and the friction torque transmitted from the feed rollers b and c through the two sheets of paper is Tpp, Tpp The friction torques Tm, Tp and Tpp have a relation of Tp>Tm> Tpp. It is obtained by, characterized in that the.

To explain this action, when the motor h is driven by the establishment of the above torque relationship, the feed rollers b and c rotate in the A direction, and the separation rollers d and e move in the B direction in response to this. Is rotated. On the other hand, the intermediate rollers f and g are rotated in the C direction by another motor i. As a result, the friction torque transmitted from the separation rollers d and e from the feed rollers b and c is naturally higher than the friction torque transmitted from the intermediate rollers f and g.
And slippage occurs between the separation rollers d and e.

Therefore, the feed rollers b and c and the separation rollers d and e are in a meshed state and no slip occurs between the rollers.

The lowest one of the sheets stacked next
A sheet of paper a includes feed rollers b and c and separation rollers d and e.
It is bitten in the gate portion j composed of and. Even in this state, the separation rollers d and e are rotated in the B direction.
That is, since the friction torque transmitted from the separation rollers d and e from the feed rollers b and c via the one sheet a is higher than the friction torque transmitted from the intermediate rollers f and g, the intermediate rollers f and g and the separation rollers d and e.

When two or more sheets are caught in the gate portion j, the separation rollers d and e are transmitted from the intermediate rollers f and g rather than the friction torque transmitted from the feed rollers b and c. Since the friction torque is higher than that of the rollers, slipping does not occur between the rollers, and slips occur between the paper sheets.

That is, when two or more sheets are inserted into the gate portion j, the separating rollers d and e are driven by the intermediate rollers f and g and rotate in the D direction. Is pushed back to prevent simultaneous feeding of multiple sheets.

[0008]

In the above conventional device,
When there is no paper sheet in the gate portion j, the separating rollers d and e are structured to rotate following the feed direction due to friction with the feed rollers b and c. When entering, slip occurs between the paper sheets, the lower paper sheets are fed out by the feed rollers b and c, and the upper paper sheets are returned to the stacking unit by the separation rollers d and e.

However, at the start of counting, or even during counting, when there is no paper sheet at the gate due to feeding failure or the like, the separation rollers d and e have inertia of rotation in the feeding direction. Since the paper would get stuck, even if two sheets of paper next entered, they would be sent out without being reversed. This inertia becomes larger as the rotation speed of the separation rollers d and e becomes faster.

In order to prevent such feeding error due to inertia of the separating rollers d and e, simply slowing down the rotation speed of the feeding rollers b and c leads to a decrease in processing speed, which is not preferable.

In view of this, the present invention provides a paper sheet feeding device capable of reliably feeding out one sheet at a time even when multiple sheets are fed in after a state in which there is no paper sheet continued in the gate portion. The purpose of the invention is to eliminate the drawbacks of the prior art.

[0012]

In order to achieve the above object, the present invention provides a feeding mechanism that is driven by a driving means and applies a conveying force to paper sheets, a gate portion formed in contact with the feeding mechanism, and a paper sheet. A sheet feeding device having a separating mechanism that is reversely driven by a torque that is smaller than a friction torque between a leaf and a feeding mechanism and is larger than a friction between sheets and a sheet feeding device. A sheet detecting means for detecting the presence or absence of a sheet is provided, the feeding mechanism is driven at a low speed at the start of feeding, and is driven at a high speed when the sheet detecting means detects a sheet. According to a second aspect of the present invention, the paper sheet detection means for detecting the presence or absence of paper sheets and the clocking means are provided near the gate portion, and the feeding mechanism is configured to detect the paper sheets by the paper sheet detection means. Leaves have been inspected for a certain time Driven at slow speed when it is not,
It is characterized in that the paper sheet detection means is driven at a high speed when the paper sheet is detected.

[0013]

According to the above construction, in the first aspect, the feeding mechanism is driven at a slow speed at the start of feeding. At this time, since no paper sheet has entered the gate portion, the separation roller is driven and rotated by the feeding mechanism. When the delivered paper sheet is detected by the paper sheet detection means, the delivery mechanism is driven at a high speed. When the number of paper sheets that have entered the gate portion is one, the separating mechanism continues to rotate. When two sheets of paper have entered, the separating mechanism reverses to separate the upper paper. Since the drive speed of the feeding mechanism before the paper sheet enters, that is, the driven rotation speed of the separating mechanism is slow, the inertia of the separating mechanism is small and the sheet is immediately reversed.

According to the present invention, the time from the detection of the paper sheet by the paper sheet detection means to the detection of the next paper sheet is measured by the time measurement means, and the paper sheet has a predetermined time. If not detected, the feeding mechanism is driven at a low speed, and when the fed paper sheet is detected by the paper sheet detecting means, the feeding mechanism is driven at a high speed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

In the illustrated embodiment, a case where a bill is handled as a paper sheet is illustrated, and the feeding device thereof is driven by a feeding motor 1 as an example of a driving means, as shown in FIGS. 1 and 2. A feeding roller 2 that constitutes a feeding mechanism that gives a conveying force to P, and a gate portion 4 formed between an upper portion of the feeding roller 2 and a reverse roller 3 that constitutes a separating mechanism, a banknote P, and a feeding roller 2. A reverse rotation motor 5 driven by a torque smaller than the friction torque between the banknotes and larger than the friction between the banknotes, and detecting the presence or absence of the banknote P in the vicinity of the gate section 4. Means 6 are provided. The feeding motor 1 drives the feeding roller 2 at a low speed at the start of feeding, and drives the feeding roller 2 at a high speed when the paper sheet detecting unit 6 detects the banknote P. In addition, in the vicinity of the gate portion 4, a clocking means (not shown) is provided in addition to the paper sheet detection means 6 for detecting the presence or absence of the banknote P, and the paper sheet detection means 6 is provided with a predetermined paper currency P. If it is not detected for a time or more, the feeding motor 2 is driven at a low speed, and when the paper sheet detecting means 6 detects the banknote P, it is driven at a high speed.

Specifically, one feeding roller 2 and two driving pulleys sandwiching the feeding roller 2 are provided at the center of a first driving shaft 7 driven counterclockwise in the figure by the feeding motor 1. 8 and 8 are attached. Further, the feeding motor 1 is capable of shifting in two stages of high speed and low speed. At high speed, the peripheral speed of the feeding belt 2 to the feeding roller 2 and the pulley 8 is rotated at about 2600 mm / s,
It is designed to rotate at about 325 mm / s at low speed.

Drive pulleys 8,8 and rear pulleys 10,1
The feeding belts 11 and 11 are wound between 0 and are driven counterclockwise in the drawing. Delivery belts 11, 11
A stacking unit 12 that receives the banknotes P to be processed in a stacked state is formed above the. Feeding belt 11,1
The upper surface of 1 is exposed in the stacking unit 12, and the lowest banknote among the banknotes P stacked in the stacking unit 12 is the belt 11, 1.
Touch 1. Note that the stacking unit 12 is provided with a bill insertion detection sensor 13 that detects whether or not a bill P has been inserted.

A reversing roller 3 which receives a counterclockwise drive in the figure from a reversing motor 5 is arranged above the feeding roller 2, and a gate portion 4 is formed between the reversing roller 3 and the feeding roller 2. It Then, the torque limiter 1 is provided on the drive transmission path from the reverse rotation motor 5 to the reverse rotation roller 3.
4 is arranged and the reverse rotation roller 3 is driven in reverse if no load is applied to the reverse rotation roller 3, but is not driven in reverse if a load (stop, reverse rotation) of a predetermined value or more is applied to the reverse rotation roller 3. The torque limiter 14 is set to a torque smaller than the friction torque between the bill P and the feeding roller 2 or between the feeding roller 2 and the reverse rotation roller 3 and larger than the friction torque between the bills P and P.

The reversing roller 3 is swingably supported by a swinging member 16 whose base portion is supported by a pulley shaft 15. The swinging member 16 is pulled downward by a tension spring 17 so that the reversing roller 3 is fed out. Pressed on 2. Further, in the gate portion 4, a bill feeding detection sensor 18 is arranged, the detection line of which crosses the bill conveying surface and which detects whether or not a bill has entered the gate portion.

As described above, the paper sheet detecting means 6 is composed of the bill insertion detection sensor 13 and the bill feeding detection sensor 18.

In addition, although not shown, the timing means shown in the block diagram of FIG. 6 can be synchronized with the detection results of the bill feeding detection sensor 13 and the bill insertion detection sensor 18.

In FIGS. 1 and 2, reference numeral 19 is a belt for transmitting rotation from the reverse rotation motor 5 to the torque limiter 14.
Reference numeral 0 is a belt for transmitting rotation from the torque limiter 14 to the shaft 15, and 21 is a belt for transmitting rotation from the shaft 15 to the reverse rotation roller 3.

Next, the operation when the bills are fed by the feeding device will be described.

The movements of the feeding roller 2 and the reverse rotation roller 3 during the feeding operation are shown in FIGS. 3A to 3D, and the relationship between the detection state of the bill feeding detection sensor 18 and the drive control of the feeding roller 2 is shown in FIG. And shown in FIG.

In the standby state, since the banknote P does not exist in the gate portion 4, the banknote payout detection sensor 18 is in a light-transmitting state, and the payout roller 2 is stopped by stopping the belts 11 and T = 0 in FIG. In the position.

When the banknotes P are set in the stacking unit 12 and a start button (not shown) is pressed, the feeding motor 1 and the reverse rotation motor 5 are driven. At this time, since the feeding motor 1 is driven at a low speed, the feeding motor 1 is gradually accelerated from the speed 0, and becomes constant when reaching 325 mm / s, and becomes the state of T1 in FIG. The reverse rotation roller 3 is the feeding roller 2
Immediately after the contact, and a torque stronger than the set value of the torque limiter 14 is received from the delivery roller 2, the drive roller rotates in the delivery direction against the drive from the reverse rotation motor 5.
The state of (a) is obtained. It should be noted that if the bill insertion detection sensor 13 remains in the translucent state, it is determined that there is no bill, and the feeding motor 1 and the reverse rotation motor 5 are not driven.

The lowermost banknote P by the feeding belt 11
When the bill P is detected by the bill feeding detection sensor 18, the feeding motor 1 is switched to high speed driving as shown at T2 in FIG.

The behavior of the feeding roller 1 and the reverse rotation roller 3 when the bill is normally fed out and one bill P is fed into the gate portion 4 is as shown in FIG. 3 (b). At this time, the bill P is fed by the feeding roller 2 in the feeding direction. The reverse rotation roller 3 is driven in the reverse rotation direction from the reverse rotation motor 5, but since the friction torque received from the banknote P is larger, the reverse rotation roller 3 is driven to rotate in the feeding direction.

In the double feed state in which two banknotes have entered the gate portion 4, the lower banknote P is in contact with the payout roller 2 and therefore receives the carrying force in the payout direction, and the upper banknote P is fed. Since it is in contact with the reverse rotation roller 3, it receives a conveying force in a direction opposite to the feeding direction. Here, the feeding roller 2 and the bill P
Friction torque between the banknotes P and the banknotes P,
Comparing the friction torque between the reverse rotation roller 3 and the bill P, the friction torque between the bills P and P is the smallest, and therefore slippage occurs here.

Since the set value of the torque limiter 14 is larger than the friction torque between the banknotes P and the banknotes P, the reverse rotation roller 3 is not driven to rotate in the feeding direction.

Therefore, the lower banknote P is fed by the feeding roller 2
Is conveyed in the feeding direction by the above, the upper banknote P is fed back by the reverse rotation roller 3, and the banknote is reliably separated.

When the upper bill P is returned to the stacking unit 12 and the double feeding is canceled, the reverse rotation roller 3 comes into contact with the bill P conveyed by the feeding roller 2 and is driven to rotate in the feeding direction due to the relation of the torque value. Then, the state shown in FIG. 3D is obtained.

However, in the state in which the reverse rotation roller 3 comes into contact with the delivery roller 2 and is driven to rotate in the delivery direction, the reverse rotation roller 3 has an inertia to rotate in the delivery direction, and the inertia is that of the reverse rotation roller 4. The higher the rotation speed (in this case, the rotation speed of the payout roller 2 that gives rotation to the reverse rotation roller 3), the higher the rotation speed, and the slower the rotation speed, the lower the rotation speed.

In the case of the device of the present invention, the bill P that has been fed is detected by the bill feeding detection sensor 18 as shown in T of FIG.
Since the feeding roller is driven at a low speed up to 2, the inertia of the driven reverse rotation roller 3 is small, and even if the double-fed banknote P enters there, it can be reliably separated. Further, after the bill feeding detection sensor 18 detects the bill P, the feeding roller 2 is driven at a high speed, so that the processing speed can be increased.

The banknotes P set in the stacking unit 12 are fed to the gate unit 4 by the feeding belts 11 and 11 in order from the lowest order, and fed while being separated one by one by the feeding roller 2 and the reverse rotation roller 3.

If the transparent state of the bill payout detection sensor 18 continues for a predetermined time ΔT in FIG. 4 and the bill insertion detection sensor 13 is also in the translucent state, it means that the payout process is completed. The drive of the feeding motor 1 is judged and stopped as shown at T4 in FIG.

Not only at the start of counting, but also when the bill P is not fed out for a predetermined time even during the counting process, that is, when the transparent state of the bill feeding detection sensor 18 continues for a predetermined time, the feeding motor 1 is rotated at a low speed. Switch to drive. Then, when the paper sheet delivery detection sensor 18 detects the banknote P again, it is returned to the high speed drive and the normal delivery process is performed.

This will be specifically described with reference to FIG.

The end of the bill P is the bill feeding detection sensor 18
When the next banknote P is not detected and the banknote insertion detection sensor 13 is in the light-shielded state even after the preset predetermined time ΔT has passed after passing through the detection line of T3 as in T3, The drive of the motor 1 is switched to the low speed drive.
When the next banknote P is detected by the banknote payout sensor 13 as indicated by T5, the high speed drive is switched to the normal processing.

As a result, the same effect as at the start of counting can be obtained.

Furthermore, changing the speed of the feeding belts 11 and 11 when the feeding of the bills P is delayed delays the accumulated bills and is expected to have the effect of promoting the normal feeding.

FIG. 6 is a block diagram showing the configuration of the feeding device of the present invention, and shows that the feeding motor 1 and the reverse rotation motor 3 are driven based on the respective signals input to the control section.

The rollers in the illustrated embodiment may be replaced by belts, and the belts may be replaced by rollers, and the selection is arbitrary. Further, the rotation speed of the feeding mechanism is not limited to the high / low second speed, and may be gradually changed in three or more steps or infinitely.

[0045]

As described above, according to the present invention, the feeding mechanism that is driven by the driving means and applies the conveying force to the paper sheet, and the gate portion formed in contact with the reversing mechanism above the feeding mechanism. A sheet feeding device having a separating mechanism driven in reverse by a torque smaller than a friction torque between the sheet and the feeding mechanism and larger than a friction between the sheets. Near the section,
By providing the paper sheet detection means for detecting the presence or absence of paper sheets, at the start of feeding by the drive means for feeding, the feeding mechanism is driven at a slow speed, and the paper sheet detection means When the sheet is detected, the sheet is driven at a high speed, and in the claim 2, the sheet feeding means and the timing means for detecting the presence or absence of the sheet are provided in the vicinity of the gate portion, so that the feeding mechanism is configured to feed the sheet. If the paper sheet is not detected in the class detection means for a predetermined time or more, the feeding drive means is driven at a slow speed, and when the paper sheet detection means detects a paper sheet, the paper sheet is driven at a high speed. Even when multiple sheets are fed after the state where there are no sheets at the gate portion continues, the sheets can be reliably separated and fed one by one.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts showing an embodiment of a paper sheet feeding device according to the present invention.

FIG. 2 is a side view of FIG. 1 viewed from the direction of arrow A.

3A and 3B show a relationship between movements of a feeding roller and a reverse rotation roller in FIG. 2, where FIG. 3A is a standby state diagram, FIG. 3B is an entry state diagram of one banknote, and FIG. , (D) is a multi-feed cancellation state diagram.

FIG. 4 is a relational diagram of the detection results of the bill insertion detection sensor and the bill feeding detection sensor in FIG. 2 and the speed control of the feeding means.

5 is a relational diagram of the detection results of the bill insertion detection sensor and the bill feeding detection sensor in FIG. 2 and the speed control of the feeding means.

FIG. 6 is a control block diagram of the device of the present invention.

FIG. 7 is a perspective view showing a structure of a conventional sheet feeding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Feeding motor 2 Feeding roller 3 Reverse rotation roller 4 Gate section 5 Reverse rotation motor 6 Paper sheet detecting means

Claims (2)

[Claims] 1. A friction mechanism between a feeding mechanism driven by a driving means for giving a conveying force to a paper sheet, a gate portion formed in contact with the feeding mechanism, and a paper sheet and the feeding mechanism. In a paper sheet feeding device having a separation mechanism that is reversely driven by a torque larger than the friction between paper sheets, a paper sheet detection means for detecting the presence or absence of paper sheets is provided near the gate portion, The sheet feeding device is characterized in that the feeding mechanism is driven at a low speed at the start of feeding, and is driven at a high speed when the sheet detecting means detects a sheet. 2. The friction torque between the paper sheet and the feeding mechanism, which is driven by the driving means and applies a conveying force to the paper sheet, a gate portion formed in contact with the feeding mechanism, and less than a friction torque between the paper sheet and the feeding mechanism. In a paper sheet feeding device having a separation mechanism that is reversely driven by a torque larger than the friction between the paper sheets, a paper sheet detecting means for detecting the presence or absence of paper sheets near the gate part, and a clocking means. The feeding mechanism is driven at a slow speed when a paper sheet is not detected by the paper sheet detecting means for a predetermined time or more, and is driven at a high speed when the paper sheet detecting means detects a paper sheet. A paper sheet feeding device characterized in that.