JP2893619B2 - 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 improved paper sheet feeding performance.

(B) Prior art Generally, as shown in FIGS. 8 and 9, this type of paper sheet feeding apparatus is stored by a feed roller 82 disposed at a feeding position of a paper sheet storage unit 81. The paper sheets 83 are sent out, and the overlapped feed roller 84 and the gate roller 85 for controlling the output of the sent paper sheets 83 are fed out one by one.

However, at the time of this feeding, the paper quality changes due to changes in temperature and humidity, the friction coefficient of various roller peripheral surfaces changes due to aging, the amount of overlap changes, and paper sheets having a strong folding habit. In the case of various paper sheets such as ultra-thin paper sheets and ultra-soft paper sheets, the balance between the feed force of the feed roller and the stopping force of the feed roller and the gate roller is lost, and the feeding performance is reduced, This has been 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 always stabilizes the balance between the feed force of the feed roller and the stopping force of the feed roller and the gate roller, thereby achieving stable feeding without defective feeding. It is an object of the present invention to provide a paper sheet feeding device to be executed.

(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, A feeding state detecting means for detecting a feeding timing degree and a skew degree of the paper sheet, and a control means for controlling the pressing force adjusting means based on the detection data of the feeding state detecting means. This is a feeding device.

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 degree, skew degree, and the like of the paper sheets, and this detection is performed. 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.

(F) Effect of the Invention As a result, the pressing force adjusting means outputs the optimum correction value corresponding to the current detection data, and the feed force of the feed roller and
The balance between the stopping force of the feed roller and the gate roller is always maintained normally.

Therefore, changes in the paper quality of paper sheets due to the effects of temperature and humidity, and changes in the friction coefficient of various rollers due to aging, fluctuations in the amount of overlap, and paper sheets with extremely kinks, ultra-thin paper sheets, and ultra-soft paper Even in the case of various kinds of paper sheets, such as paper sheets, an appropriate payout performance is always maintained by following this change, and a reliable and stable payout operation is promoted.

(G) Embodiment One embodiment of the present invention will be described below in detail 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, a bill upper limit detection switch S3, a timing detection sensor S4, and left and right pressing force adjustment mechanisms 15 and 16.

The above-mentioned bill storage box 12 is a bill pressing plate 17 that moves up and down by a pulse motor M1, and presses and presses the stacked banknotes 13 upward from below.
Upper limit detection switch S3 for detecting the upper limit position suitable for feeding banknote 13 and initial feeding roller R divided into left and right.
1 and R2, of which the initial feeding rollers R1 and R2 are arranged in two parts on the coaxial line in the feeding width direction, and the above-mentioned bill 13 is pressed and urged to be received and received there. The stopped uppermost banknote 13 is provided in a contact correspondence state in which the banknote 13 can be fed out by the rollers R1 and R2.

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 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 controlled by the right and left pressing force adjusting mechanisms 15 and 16 so that both rollers R1 and R2 are moved.
Are provided so that the pressing force on the bill 13 can be adjusted independently.

The above-described pressing force adjusting mechanisms 15 and 16 include left and right pressing motors M3 and
The rotation transmission force from M4 is transmitted to the left and right pressing force transmission belts B3 and B4.
Left and right pressing arms 19, 20 supported on a horizontal shaft 18 through
The pressing arms 19 and 20 that have received the rotation transmitting force individually and downwardly move the rollers R1 and R2 pivotally attached to the distal ends of the arms 19 and 20 with the horizontal shaft 18 as a fulcrum. To adjust the pressure.

The feed position of the feed path 12 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 to detect one rotation operation of the feed roller and control the timing of dispensing one bill 13.

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

Then, on the basis of these detection data, the feeding force is controlled while adjusting the pressing forces of the left and right initial feeding rollers R1 and R2 individually to adjust to the optimum feeding state. 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. Is a state diagram of a pressing experiment result showing the relationship, as seen in the area distribution characteristics of this figure, there is a tendency to continuously feed the bills 13 in proportion to the magnitude of the pressing force, and the amount of overlap amount It is recognized that there is a tendency for emptying to occur in proportion to the feed force.By adjusting both the pressing force and the overlap amount to maintain the feed force and the stopping force in a well-balanced manner, the optimum feeding is achieved. A stable condition range is obtained.

Further, even if the friction coefficient of the various rollers fluctuates, or as shown in FIG. In the same manner, the condition variation corresponds in parallel to the above characteristic, and the proper feeding performance is always maintained even for various condition variations.

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.

Using the bill feeding device 11 configured as described above, the bill 13
Are fed one by one, first, the initial feeding motor M2 is driven to rotate the left and right initial feeding rollers R1, R2. Thereby, the bills 13 in the feeding standby state 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 71 individually and independently adjusts the optimum pressing force such as pressurization and depressurization for the left and right pressing force adjustment mechanisms 15 and 16. For example, the tendency of continuous feeding, the tendency of emptying, the tendency of skew, etc. are detected by the left and right feeding detection sensors S1 and S2 and the timing detection sensor S4, and if this detection data appears to precede the reference feeding timing, that side The pressing force is reduced according to the detected data amount, and if it is delayed, the pressing force on that side is increased according to the detected data amount. In this manner, the pressed and adjusted banknote 13 is always fed out and corrected to a normal feeding state, and is fed stably.

As described above, the pressing force adjusting mechanism outputs the optimum correction value corresponding to the current detection data of the bill to be fed, and the feed force of the initial feeding roller and the stopping force by the feed roller and the gate roller are output. In order to maintain a normal balance at all times, changes in the paper quality of the banknotes due to the effects of temperature and humidity, changes in the friction coefficient of various rollers due to aging, changes in the amount of overlap, and furthermore, banknotes with extremely kinks, ultrathin paper, Even in the case of various kinds of banknotes and papers such as soft papers, following this change, an appropriate payout performance is always maintained, and a reliable and stable payout operation is promoted.

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, and similarly, the paper sheet corresponds to the banknote 13. The pressing force adjusting means corresponds to the left pressing force adjusting mechanism 15 and the right pressing force adjusting mechanism 16, and the feed rollers correspond to the left initial feeding roller R1 and the right initial feeding roller R2 to detect the feeding state. The means corresponds to the left extension detection sensor S1, the right extension detection sensor S2, the upper limit detection switch S3, and the timing detection sensor S4, and the control means corresponds to the CPU 71. However, the present invention is not limited only to the above configuration.

[Brief description of the drawings]

1 to 7 show an 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 bill feeding. 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 a strong bending habit of a bill. FIG. 7 is a perspective view showing an example, FIG. 7 is a control circuit block diagram of a bill feeding device, FIG. 8 is a side view of a main part showing a conventional bill feeding device, and FIG. 9 is a plan view of a main portion showing a conventional bill feeding device. It is. 11… Bill feeding device, 13… Bill 15,16… Pressure adjustment mechanism R1, R2… Initial feeding roller R3, R4… Feed roller R5, R6… Gate roller S1, S2… Feeding detection sensor S4… Timing detection sensor M3, M4 ... Pressing motor, 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; feeding state detecting means for detecting a feeding timing degree and a skew degree of a sheet; and detection data of the feeding state detecting means. And a control means for controlling the pressing force adjusting means based on the above.