JP2785481B2 - Paper feeding device - Google Patents

Description

The present invention relates to an apparatus for feeding paper sheets, such as a paper feeder, which is internally configured in an automatic transaction machine that handles paper sheets such as banknotes, for example.
More specifically, the present invention relates to a paper sheet feeding device having a high feeding adjustment capability.

(B) Conventional technology In general, this type of paper sheet feeding device sends out the paper sheets stored by a feed roller disposed at a feeding position of a paper sheet storage unit, and outputs the sent paper sheets. Sheets are fed out one by one by an overlap type feed roller and a gate roller that regulate the feeding out of one sheet (for example, see Japanese Unexamined Patent Publication No.
-280141).

In this case, the payout gap of the overlap portion is always set to an optimum value, and stable payout without defective feed is executed. When the gap is weak, or when foreign matter such as tape or glue is attached, there is a limit to the correction capacity only by adjusting the gap at the overlapped portion. Let me do it.

Furthermore, when the paper quality changes due to changes in temperature or humidity, or when the friction coefficient of various roller peripheral surfaces changes due to aging or ink adhesion, the feed force of the feed roller and the stopping force of the feed roller and gate roller And the feeding performance is degraded, and this is a factor of causing feeding defects such as skew, jam, continuous feeding, and emptying.

(C) Problems to be Solved by the Invention The present invention achieves high reliability by adjusting the feed force of the feed roller and adjusting the stopping force by the feed roller and the gate roller in two steps. An object of the present invention is to provide a paper sheet feeding device that executes stable feeding.

(D) Means for Solving the Problems The present invention relates to a feed roller that feeds out stored paper sheets, and a separation unit that controls one of the fed paper sheets by a feed roller and a gate roller. A feed force adjusting means for disposing the feed rollers at both side positions in the sheet width direction and independently adjusting the pressing force of both rollers, Gap adjusting means for independently adjusting the gaps between the feed roller and the gate roller opposed to both sides in the feed width direction of the separation unit, and feeding for detecting the feeding timing degree and the skew degree of the paper sheet. The paper sheet feeding device includes a state detecting unit and a control unit that controls the pressing force adjusting unit and the gap adjusting unit based on detection data of the feeding state detecting unit.

According to the present invention, when paper sheets are fed out of the storage unit one by one, the feeding state detecting means detects the current feeding timing of the sheet flow, the degree of skew, and the like. Based on the data, the control means individually and independently adjusts the optimum pressing force such as pressurization and decompression for the feed rollers on both sides of the pressing force adjusting means, and when this pressing adjustment operation is performed, the abnormal paper If there is room for correction due to leaves, etc., a re-correction operation is performed by the gap adjusting means located at the subsequent stage.

(F) Effects of the Invention As described above, the paper sheet fed out is controlled by the two-stage adjusting means in which the pressing force adjusting means and the gap adjusting means are combined.
Perform the feeding operation while always maintaining the perfect feeding posture.

For this reason, changes in paper quality and aging of paper sheets due to the effects of temperature and humidity, fluctuations in the friction coefficient of various rollers due to ink adhesion, and paper sheets with strong bending habits, ultra-thin paper sheets, and ultra-soft paper sheets Even in the case of various kinds of paper sheets, such as this, it keeps an appropriate payout performance by following this change, and executes a reliable and stable payout operation.

(G) Embodiment One embodiment of the present invention will be described in detail below with reference to the drawings.

The drawings show a bill feeding device. In FIGS. 1 to 3, the bill feeding device 11 is provided with left and right initial feeding rollers disposed along a feeding path 14 of a bill 13 fed from a bill storage box 12. R1, R2 and left and right feed rollers R3, R4
And left and right gate rollers R5 and R6, left and right feeding detection sensors S1 and S2, bill upper limit detection switch S3, timing detection sensor S4, left and right pressing force adjustment mechanisms 15, 16 and left and right gap adjustment It is composed of mechanisms 22 and 23.

The above-mentioned bill storage box 12 presses and biases the stacked bills 13 upward from below with a bill pressing plate 17 that moves up and down by a bill urging motor M1, and the pressed and urged upper facing position includes: An upper limit detection switch S3 for detecting an upper limit position suitable for feeding the bill 13 and initial feeding rollers R1 and R2 divided into left and right are arranged, and the initial feeding rollers R1 and R2 are coaxial in the feeding width direction. The above-mentioned bill 13 is pressed and urged and received here, and the received top-most bill 13 is brought into contact with the rollers R1 and R2 in a contact-compatible state. Waiting.

When driving these left and right initial feed rollers R1 and R2, the rotational transmission force from the initial feed motor M2 having a built-in clutch is transmitted via the horizontal shaft 18 and both transmission belts B1 and B2 which are installed in the feed width direction. Drive is transmitted to both rollers R1 and R2,
By rotating these two rollers R1 and R2, the banknotes 13 on the upper surface are sequentially fed out from the banknote storage box 12 in an initial feeding operation.

The right and left initial feeding rollers R1 and R2 are applied to both rollers R1 and R2 by pressing force adjusting mechanisms 15 and 16 on the left and right.
Are provided so that the pressing contact force can be adjusted independently of each other.

The above-described pressing force adjusting mechanisms 15 and 16 include left and right pressing force motors M.
3, the rotation transmission force from M4 is transmitted to the left and right pressing force transmission belts B3, B
Left and right pressing arms 19, 20 supported on a horizontal shaft 18 via 4
The pressing arms 19, 20 which have received the rotation transmitting force have the horizontal shaft 18 as a pivot point, and the left and right initial feeding rollers R1, R2 pivotally attached to the distal ends of the arms 19, 20 face downward. The pressure can be adjusted independently of each other.

The feed position of the feed path 14 includes left and right feed rollers R3 and R4 each of which is provided with a high-friction member 21 such as a rubber material for performing one-sheet feed per rotation on a part of the peripheral surface, and a feed direction. The left and right gate rollers R5, R6 for controlling one sheet take-out that regulate the rotation of the sheet are opposed to a so-called overlap type in which irregularities are made to correspond to the separation to promote separation, and one of the feed rollers R3 has a timing detection sensor S4. Is arranged, the rotation of the feed roller is detected, and the timing of feeding one banknote 13 is controlled so that the banknote 13 is fed at a constant pitch.

The above-mentioned left and right gap adjusting mechanisms 22 and 23 have the same mechanism on the left and right. Among them, if the left gap adjusting mechanism 22 shown in FIG. 1 is described as an example, a tilting lever that supports the gate roller R5 while allowing it to tilt. 24, and a gap adjusting motor M5 for adjusting the amount of tilt of the tilt lever 24 to adjust the amount of overlap between the gate roller R5 and the feed roller R3.

The above-described tilting lever 24 is formed in a G-shape, and the gate roller R5 described above is pivotally attached to the G-shaped protruding piece 25 at the intermediate portion, and the gate roller R5 connects the upper end pivot support portion 26 of the tilting lever 24. The gate roller R5 is biased and supported toward the feed roller R3 by a biasing action of a biasing spring 27 which is allowed to tilt at the tilting fulcrum and is connected to the lower end of the tilting lever 24.

A gap adjusting motor M5 is provided below the tilt lever 24.
Are opposed to each other. This gap adjusting motor M5 is equipped with a lead screw 28 that moves forward and backward by pulse output, and by moving this lead screw 28 forward, pushes the lower part of the tilting lever 24 in the reverse biasing direction to slightly displace the gate roller R5. Then, fine adjustment is made in the direction to widen the facing gap between the gate roller R5 and the feed roller R3.

Conversely, by retracting the lead screw 28, the lower part of the tilting lever 24 is tilted in the direction in which the urging force of the urging spring 27 acts, thereby displacing the gate roller R5 by a small amount.
Fine adjustment is made in the direction to narrow the gap between R5 and feed roller R3.

In this case, the left and right gap adjustment mechanisms 22 and 23 are individually driven by left and right independent gap adjustment motors M5 and M6, and the gate rollers R5 and R6 that are left and right independently are interlocked with each other by a predetermined amount. Fine-tuned.

Further, left and right feed-out detection sensors S1 and S2 are arranged at the rear position of these rollers R3 to R6 in the conveying width direction, and as shown in FIG. The state is detected.

Then, based on these detection data, the pressing forces of the left and right initial feeding rollers R1, R2 are individually adjusted to adjust the optimum feeding pressing state, and when this pressing adjustment operation is performed, abnormal bills and the like are generated. If there is room for correction due to this, the feeding control is performed while performing the re-correction operation by the gap adjustment mechanisms 22 and 23 located at the subsequent stage.

As a result, the bill 13 to be dispensed is corrected and dispensed to a proper dispensing state in which deviations in the dispensing timing degree and the skew degree are eliminated.

FIG. 5 shows the pressing force that affects the feed force of the initial feeding rollers R1 and R2, and the overlap amount that affects the stopping force of the bill separator by the feed rollers R3 and R4 and the gate rollers R5 and R6. It is a state diagram of the pressing experiment result showing the relationship, as seen in the area distribution characteristics of this figure, the bill 13 tends to advance in proportion to the magnitude of the pressing force,
In addition, it is recognized that emptying tends to occur in proportion to the magnitude of the overlap amount, and the pressing force and the overlap amount of these two are adjusted to maintain the feeding force and the stopping force in a well-balanced manner. As a result, an optimum feeding condition stable region can be obtained.

Further, even in the case of fluctuations in the coefficient of friction of various rollers, or in the case of various types of paper such as banknotes 13 with a strong kinking tendency or extremely thin paper or extremely soft paper, as shown in FIG. In the same manner, condition fluctuations corresponding to parallel conditions are obtained, and an appropriate feeding performance is always maintained even for various condition fluctuations.

FIG. 7 shows a control circuit block diagram of the bill feeding device. The CPU 71 controls the output degree of each of the motors M1 to M4 according to the detection data detected and input from each of the detection sensors S1 to S4 and the program stored in the ROM 72. The necessary control data is stored in the RAM 73.

The above-described CPU 71 individually and independently adjusts the optimum pressing force by the right and left pressing force adjusting mechanisms 15 and 16 located inside the banknote storage box 12, and if there is room for correction at this time, the subsequent steps are performed. Left and right gap adjustment mechanism 2 located outside the bill storage box 12
2, 23, a mechanism for performing two-stage adjustment control so that the left and right gaps are finely adjusted and a re-correction operation is performed.

Using the bill feeding device 11 configured as described above, the bill 13
First, the initial drive motor M2 is driven to rotate the left and right initial feed rollers R1 and R2. Thereby, the bills 13 waiting on the uppermost surface of the bill storage box 12 are fed out one by one from the bill storage box 12.

At this time, the initial dispensing state of the bill 13 to be dispensed is detected by the left and right dispensing detection sensors S1, S2 and the timing detection sensor S4, thereby detecting the current dispensing timing degree, skew degree, and the like of the bill. Based on the data, the CPU 7 adjusts the left and right pressing force
In contrast, the optimal pressing force such as pressurization / decompression is adjusted individually and independently.

For example, the left and right feeding detection sensors S1, S1
2 and the timing detection sensor S4. In this case, if the detection data precedes the reference feeding timing, the pressing force on that side is reduced according to the detection data amount, and if the detection data is delayed, the pressing force on that side is used as the detection data amount. Increase accordingly. As a result, the feeding is corrected to a normal feeding state and the feeding is stabilized.

However, at this time, if there is room for correction such as skew due to the abnormal abnormal banknote even after the pressing adjustment operation, the adjustment operation is further performed via the left and right gap adjustment mechanisms 22 and 23 at the subsequent stage.

For example, when a right leading skew state occurs after the pressing adjustment, the right gap adjusting mechanism 23 narrows the right gap and regulates the right leading, while the left gap adjusting mechanism 22 widens the left gap to the left. To promote the sending of As a result, the skew is corrected, and the feeding can be optimized.

As described above, the bill to be fed out is controlled by a two-stage adjusting mechanism combining the pressing force adjusting mechanism and the gap adjusting mechanism.
The feeding operation is performed while always being kept in the perfect feeding posture.

For this reason, changes in the paper quality and aging of the banknotes due to the effects of temperature and humidity, and changes in the coefficient of friction of various rollers due to the adhesion of ink, and in the case of various banknotes such as banknotes with strong kinks, ultrathin banknotes, and ultrasoft banknotes Even so, an appropriate payout processing performance is always maintained by following this change, and a reliable and stable payout operation is executed.

In correspondence between the present invention and the configuration of the above-described embodiment, the paper-sheet feeding device of the present invention corresponds to the banknote feeding device 11 of the embodiment. The pressing force adjusting means corresponds to the left pressing force adjusting mechanism 15 and the right pressing force adjusting mechanism 16, and the gap adjusting means includes the left gap adjusting mechanism 22 and the right gap adjusting mechanism.
23, the feed roller corresponds to the left initial feeding roller R1 and the right initial feeding roller R2, and the feeding state detecting means includes a left feeding detection sensor S1, a right feeding detection sensor S2, and an upper limit detection switch. Although the control means corresponds to S3 and the timing detection sensor S4, and the control means corresponds to the CPU 71, the present invention is not limited to only the configuration of the above-described embodiment.

[Brief description of the drawings]

1 to 7 show one embodiment of the present invention, FIG. 1 is a side view showing a bill feeding device, FIG. 2 is a plan view showing a bill feeding device, and FIG. 3 is a bill feeding state. FIG. 4 is a time chart showing a detection state of feeding of a bill, FIG. 5 is a pressing state diagram showing a relationship between a pressing force and an overlap amount, and FIG. 6 is an example of a strong bending habit of a bill. FIG. 7 is a control circuit block diagram of the bill feeding device. 11… Bill feeding device, 13… Bill 15,16… Pressure adjustment mechanism 22,23… Gap adjustment mechanism R1, R2… Initial feeding roller R3, R4… Feed roller R5, R6… Gate roller S1, S2: Feeding-out detection sensor S4: Timing detection sensor, 71: CPU

Claims (1)

(57) [Claims] A feed roller for feeding stored paper sheets;
What is claimed is: 1. A sheet feeding apparatus comprising: a separation unit configured to control one sheet sent out by a feed roller and a gate roller, wherein the feed roller is disposed at both sides in a sheet width direction. Pressing force adjusting means for individually and independently adjusting the pressing force of the two rollers; and independently adjusting the opposing gaps between the feed roller and the gate roller opposed to both sides in the feed width direction of the separation unit. A gap adjusting unit that controls the pressing force adjusting unit and the gap adjusting unit based on detection data of the feeding state detecting unit that detects a feeding timing degree and a skew degree of the paper sheet. A paper sheet feeding device comprising: