JPH05301647A - Paper sheet separating device - Google Patents

Abstract

PURPOSE:To simplify mechanism and reduce noise by placing a paper feed roller and a separating roller into pressure contact, and using an ultrasonic- driven actuator as the driving means of a pickup roller and the paper feed roller. CONSTITUTION:When a delivery command is given to paper sheets 2 stacked in a hopper 1 from the outside, supply voltage of frequency in an ultrasonic region shifted by 90 deg. in phase is applied to vibrators 15R, 15L. A pickup roller 4 and a delivery roller 6 are rotated in the direction of arrow marks by advancing the vibrator 15L side phase by 90 deg. in relation to the vibrator 15R side phase. The pickup roller 4 delivers the paper sheet in pressure contact in the direction of a paper supply port 5, and the paper sheet 2 delivered into the delivery roller 6 and a separating roller 7 is pulled out, as it is, unless being duplicately fed, by a pair of pull rollers 8, 9 at low load by one-way clutches in the pickup roller 4 and feed roller 6 and delivered into a carrier path.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a banknote depositing / dispensing machine operating in a bank or an OCR used in a securities company.
The present invention relates to a paper sheet separating device used for the above.

[0002]

2. Description of the Related Art Conventionally, various types of paper sheet separating devices of this kind have been developed. In general, a plurality of sheets stacked in the hopper are fed by a pickup roller, and the fed sheets are separated one by one by a sheet feeding roller and a separation roller provided opposite to each other. It is to be transported.

Further, a paper sheet separating and feeding apparatus which solves the problem that the coefficient of friction between the surface members of the sheet feeding roller and the separating roller changes due to the change of the temperature state, resulting in a state of double feeding or paper feeding failure. However, it is disclosed in Japanese Patent Application Laid-Open No. 62-161649. This makes it possible to move the separation roller arranged opposite to the paper feed roller, to provide a temperature detection means inside the device, and to detect an appropriate amount of overlap between the paper feed roller and the separation roller by the temperature detection means. According to the temperature inside the apparatus, an overlap amount control means for automatically controlling in stages is provided. As a result, even if the temperature inside the apparatus changes and the temperature changes on the surface members of the paper feed roller and the separation roller, the overlap amount corresponding to the friction coefficient can always be obtained and reliable paper feeding can be performed. Is.

[0004]

However, in the above apparatus, it is necessary to adjust the distance between the paper feed roller and the separation roller, and if a mechanism for that purpose is provided, the mechanism becomes complicated and the cost becomes high. Furthermore, there is a problem of noise generated by the paper feed roller and the separation roller during separation.

In order to eliminate the above-mentioned problems, the present invention uses an ultrasonically driven actuator as a drive actuator for the pickup roller and the paper feed roller by pressing the paper feed roller and the separation roller into contact with each other. It is an object of the present invention to provide a paper sheet separating apparatus which has a low price and a low price, and a low noise by using an actuator outside the audible frequency range.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a storage portion accumulating paper sheets, a pair of left and right pickup rollers arranged below the storage portion, and a front end side of the storage portion. And a pair of left and right feed rollers arranged opposite to each other, and a pair of left and right separation rollers arranged so as to face the feed roller. The pickup roller is rotated to feed the paper sheet from the storage portion and the separation roller. In the paper sheet separating device that feeds the sheet between the sheet feeding device and the feeding roller and the separating roller to separate the sheets one by one, the pickup roller and the feeding roller include a one-way clutch,
Further, by separately providing left and right actuators that use vibration as drive actuators, the pickup roller and the delivery roller can be independently driven.

[0007]

The power supply voltage having a phase shifted frequency is applied to the left and right independent actuators on the sheets accumulated in the storage section. This causes the pickup roller and the delivery roller to rotate. Then, the pickup roller sends out the pressure-contacted paper sheet, and the paper sheet sent to the feeding roller and the separation roller is sent to the transport path as it is, if not double-fed.

[0008]

1 is a side view showing an embodiment of a paper sheet separating apparatus according to the present invention, FIG. 2 is a front view of a roller driving section of the paper sheet separating apparatus, and FIG. 3 is a roller driving apparatus. It is a side view of a part. In the figure, 1 is a hopper, 2 is a paper sheet, 3 is a weight plate, 4 is a pickup roller having a high friction member on the outer circumference, 5 is a paper feed port, 6 is a paper feed roller having a high friction member on the outer circumference, 7 Is a separation roller having a high friction member on the outer circumference, and 8 and 9 are pull rollers for pulling out the paper sheet 2.

Roller drive units 100a and 100b have the same structure. In this embodiment, the configuration and operation will be described using the roller driving unit 100a. Reference numeral 10 is a one-way clutch, 11 is a bearing, 13L and 13R are vibrators made of an elastic body, 14 is a plate-like piezoelectric element, and 15L and 15R are vibrating bodies to which the plate-like piezoelectric element 14 is closely adhered to both upper and lower surfaces. The plate-shaped piezoelectric element 14 expands and contracts in the longitudinal direction when a voltage is applied, and the vibrating body 1
The primary bending vibration as shown in FIG. 2 is generated in 5L and 15R. 15a and 15b are vibrating bodies 15L and 1
Reference numeral 5R is a hole formed in a portion corresponding to a node of a vibration mode generated when the piezoelectric element 14 causes bending vibration.

Numeral 12 is a roller for giving a rotational force to the vibrators 13L and 13R, and two pickup rollers 4 or feeding rollers 6 via a stepped shaft portion 12a, a bearing 11, and a one-way clutch 10. It is fastened with screws or the like so as to clamp at the stepped shaft portion. Further, the roller 12 has no support in the vertical direction, and the roller 12 is placed on the vibrators 13L and 13R by gravity, and the roller 12 is illustrated so that it is always positioned on the vibrator 13 in the horizontal direction. A stopper for any of these is provided. 16 is a vibrating body 15L, 15
By inserting the bolt 17 into the R hole 15a, the vibrator 1
It is a housing for fastening and fixing 5L and 15R. The separating roller 7 is directly driven by a low-torque, high-speed rotating DC motor (not shown), and is normally provided in pressure contact with the feeding roller 6.

The operation of the present embodiment will be described in detail below with reference to the operation explanatory diagrams of the roller driving section shown in FIGS. 1 to 3 and 4. When a feeding command is given to the paper sheets 2 accumulated in the hopper 1 by an external control system (not shown), the vibrating body 15
A power source voltage having a frequency in the ultrasonic region with a phase shifted by 90 ° is applied to R and 15L. By advancing the phase on the vibrating body 15L side by 90 ° from the phase on the vibrating body 15R side, FIG.
As shown in, the pickup roller 4 and the delivery roller 6 rotate in the direction of arrow a. The operation at this time is shown in FIG. 4, and the operation order is (a) → (b) → (c) →
(D) → (a) is repeated. Then, the pickup roller 4 sends out the pressed paper sheet 2 in the direction of the paper feed port 5, and the paper sheet 2 sent to the feeding roller 6 and the separation roller 7 is directly fed if it is not double-fed.
The one-way clutch inside the pickup roller 4 and the feed roller 6 pulls it out with a low load and feeds it into a transport path (not shown). Further, according to the present invention, the pickup roller 4 and the feed roller 6 are
Since they can be independently driven, the structure is such that the skew and the sheet interval can be easily controlled at the time of feeding.

Note that, after the designated number of sheets have been fed out after the sheet has been separated and fed, the sheet 2 remaining between the delivery roller 6 and the separation roller 7 is normally stopped in that state until the next delivery, and the sheet is removed. When the sheets are collectively taken out, only the residual paper sheets 2 are separated and fed out and fed to the accumulating section, or are recirculated to the accommodating section in the separating section and accumulated. Here, the frequency of the power supply applied to the vibrator is in the ultrasonic range, but it goes without saying that the same applies to the low frequency range. Further, although the lower separation is adopted, it goes without saying that the same may be applied to a method in which a separating portion is attached as the upper separation, and the roller 12 portion is pulled from above by a bias spring and brought into pressure contact with the vibrator 13.

[0013]

As described above in detail, according to the present invention, the means for press-contacting the feed roller and the pickup roller and the actuator for driving the pickup roller and the feed roller are placed outside the human audible frequency range, and Since the means for independently driving is provided, the cost is reduced by simplifying the mechanism of the part for adjusting the distance between the feed roller and the reverse roller, the noise generated by the feed roller and the pickup roller at the time of separation is reduced, and the left and right independent driving is performed. The effect of facilitating skew correction control by the feed roller and the pickup roller can be expected.

[Brief description of drawings]

FIG. 1 is a side view of a paper sheet separating apparatus according to the present invention.

FIG. 2 is a front view of a roller driving unit of the paper sheet separating apparatus according to the present invention.

FIG. 3 is a side view of a roller driving unit of the paper sheet separating apparatus according to the present invention.

FIG. 4 is an operation explanatory diagram of the paper sheet separating apparatus according to the present invention.

[Explanation of symbols]

 1 Hopper 2 Paper Sheet 3 Stacking Plate 4 Pickup Roller 6 Feeding Roller 7 Separation Roller 10 One-Way Clutch 12 Roller 13L, 13R Vibrator 14 Plate Piezoelectric Element 15L, 15R Vibrating Body 16 Housing 100a, 100b Roller Drive Unit

Claims (2)

[Claims] 1. A storage unit accumulating paper sheets, a pair of left and right pickup rollers arranged below the storage unit, a pair of left and right delivery rollers disposed on the front end side of the storage unit, and the delivery roller. It has a pair of left and right separation rollers arranged opposite to each other, and rotates the pickup roller to feed the paper sheet from the storage section between the delivery roller and the separation roller, and the delivery roller and the separation roller remove the paper sheet. In a paper sheet separating device that separates sheets one by one, by incorporating a one-way clutch in the pickup roller and the feeding roller, and further providing actuators that use vibration as drive actuators on the left and right independently,
A paper sheet separating apparatus, wherein the pickup roller and the feeding roller can be independently driven. 2. The paper sheet separating apparatus according to claim 1, wherein as the drive actuator, two primary flexural vibrators provided in parallel are used, and an ultrasonic wave region is used as a vibration frequency. ..