JPS6231657A - Paper sheet stacking device - Google Patents

Abstract

PURPOSE:To take the paper sheet smoothly into stacking impeller by making constant the relation between the position of the tip of paper sheet and the rotary position of said impeller. CONSTITUTION:A paper currency is carried on a carrying path 1 and detected through a detector 2. Upon elapse of predetermined time after provision of detection signal from the detector 2, the control section 21 will decide that the tip of paper currency has carried to the point A thus to read out the count in a counter 22. Then the control section 21 will read out the number of pulses corresponding with said count from ROM 23. Consequently, the control section 21 will produce the driving pulse of such frequency as corresponding with the number of pulse thus to rotate the step motor 9 with correspondence to said driving pulse. Consequently, the tip of paper currency will arrive to the inlet of impeller, then taken in smoothly with correspondence to the point (a) between the vanes (a), (a).

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a paper sheet stacking device that stacks transported paper sheets, such as banknotes, one by one using a stacking impeller.

[Technical background of the invention and its problems] Conventionally, as a control method for a stepping motor that drives an accumulating impeller, the driving frequency of the stepping motor is adjusted according to the timing of the banknotes being conveyed, as shown in FIG. 7(a). (
As shown in b), it has been changed to a square shape or a staircase. In such a method, although it is easy to calculate the frequency, there is a risk that the stepping motor may step out because the rising or falling torque of the frequency may become infinite. When this step-out occurs, the relationship between the position of the tip of the bill and the rotational position of the stacking impeller cannot be kept constant, and when the bill reaches the inlet of the stacking impeller, the rotational position of the stacking impeller It was not possible to make the rotational positions the same. For this reason, there was a drawback that banknotes could not be smoothly taken into the accumulating impeller.

[Object of the invention] This invention was made in view of the above circumstances, and its object is to make it possible to maintain a constant relationship between the position of the leading edge of paper sheets and the rotational position of the accumulating impeller. , the rotational position of the accumulating impeller can always be the same when the paper sheets reach the inlet of the accumulating impeller, and the paper sheets can be smoothly taken into the accumulating impeller. An object of the present invention is to provide a paper sheet stacking device.

[Summary of the Invention] In order to achieve the above object, the present invention provides a method for stacking paper sheets conveyed from a conveyance path by sandwiching the sheets one by one between the blades of a stacking impeller and guiding them to a stacking section. In the stacking device, a drive amount detection means detects the amount of drive by the drive means for driving the accumulation impeller, and a transportation detection means detects paper sheets provided on the conveyance path and conveyed through the conveyance path;
The drive means is driven at a conveyance speed according to the detection result by the drive amount detection means when detected by the conveyance detection means.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. ) In FIGS. 1 and 2, banknotes (paper sheets) P are conveyed on a conveyance path 1 at a constant speed in the direction of the arrow shown in the figures. A detector 2 for detecting the leading edge of the banknote P is provided on the conveyance path 1. This detector 2 is a well-known device consisting of a light emitting element and a light receiving element. Further, at the terminal end of the conveyance path 1, an accumulation impeller 3 is provided in a nested manner with the conveyance path 1. This accumulation impeller 3 collects banknotes P conveyed through the conveyance path 1 one by one by means of a vane plate 3.
This is for taking in between the blades a and 3b and stacking them in the lower stacking section 4 in a plane direction. The accumulation impeller 3 is rotatably supported by a shaft 5, and includes two blade plates 3a, 3b, a pulley 6, and a timing plate 7 fixed by a holder 8.

A timing belt 11 is wrapped around the pulley 6 and a pulley 10 fixed to the stepping motor 9. Thereby, the accumulation impeller 3, that is, the blade plates 3a and 3b, rotate in synchronization with the rotation of the stepping motor 9.

The blade plates 3a and 3b each include a ring-shaped impeller main body 12, and a plurality of blades a whose base end protrudes radially from the holder 8 direction with respect to the circumferential surface of the ring-shaped impeller main body 12 and which are bent in a predetermined direction. It is composed of... The blades a, . . . are formed in a spiral shape so that the distance between the tips is wide and the distance gradually narrows toward the base end.

Further, a wing tfla is provided on the circumference of the timing plate 7.

The same number of slits are equally spaced, and each blade a,...
It is set up correspondingly. A detector 13 including a light emitting element and a light receiving element is provided near the circumference of the timing plate 7 so as to sandwich the timing plate 7 therebetween. This detector 13 is for detecting the rotational position of the vanes 3a, 3b.

The setting position of the detector 2 is such that the tip of the banknote P is the blade plate 3a.
, 3b (point E), the leading edge of the next banknote P is conveyed at the proper position (point A) at a predetermined distance from 8 points. In this case, the transport time by the transport path 1 from the position of the detector 2 to point A is td, and A
The transport time by transport path 1 from point to point E is 1. There's a lot of yelling.

Next, FIG. 3 explains the electric circuit.

That is, 21 is a control section that controls the entire system.

This control section 21 resets a counter 22 in response to a detection signal from the detector 13, and counts up in response to a drive pulse of the stepping motor 9. Further, after a predetermined time has elapsed (after td) after the detection signal is supplied from the detector 2, the control unit 21 controls the stepping motor 9 according to the number of pulses read from the table in the ROM 23, based on the count number of the counter 22 at this time. It is what drives the. For example, if the count value when the tip of banknote P reaches point A is "3" (reference value), RO
"10" pulses are read out from M23. Also, in the case of other count values, a predetermined number of pulses are read out from the ROM 23 as shown in Table 1 below. In this case, if the count value is "3", there is no need to accelerate or decelerate, so as shown by the solid line in Figure 4,
Reference frequency f! When the stepping motor 9 is driven by , and the count value is r9.10.0.1.2J, the acceleration table becomes the reference frequency f as shown by the dashed line in the same figure.
1 to the maximum frequency f2, and then the reference frequency f again.
1 to drive the stepping motor 9, and when the count value is r4.5, 6.7.8J, the deceleration table becomes The stepping motor 9 is driven by changing the frequency to f3 and then returning to the reference frequency f1, and the area at this time becomes the number of pulses. To increase the number of pulses, the maximum frequency f2 may be increased, and to decrease the number, the minimum frequency f2 may be decreased. At the time of rising and falling (time t1) mentioned above, the frequency is gradually changed to prevent stepping motor 9 from stepping out, and during this period, the load torque applied to stepping motor 9 is prevented from exceeding the maximum torque. It has become.

The contents of the ROM 23, that is, the contents of the table, are as follows: Control is completed for each banknote during the time that the banknote P is conveyed from point A to point E, that is, t5 seconds, and the banknote P after tgsec is
The number of pulses is determined so that the relationship between the tip of the impeller 9 and the rotational position of the collecting impeller 9 is always the same. As a result, no matter what timing the banknote P is conveyed, the leading edge of the banknote P will be as shown in FIG. 5(a).
A predetermined position (point a) between the blades a and a is always captured in correspondence. At point a, the movement between blades a, that is, the movement of one blade a, is as shown in FIG. 5(b).
When corresponding to 10 driving pulses of the stepping motor 9, this is the third pulse.

Note that when the pitch of the bills P being conveyed is greater than or equal to to, the processing for the next bill is not executed during the operation using the table of the ROM 23, so that the receiving position does not change.

Further, the control section 21 rotates the stepping motor 9 by driving the driver 24,
By driving the driver 25, a motor 26 corresponding to the transport path 1 is rotated.

Next, the operation in such a configuration will be explained.

For example, now, the control unit 21 resets the counter 22 in response to a signal from the detector 13. Next, the control section 21 counts up the counter 22 for each drive pulse of the stepping motor 9. At this time, the drive pulse is generated according to the reference frequency f1.

In such a state, the banknote P is conveyed along the conveyance path 1 and detected by the detector 2. Then, after a predetermined time (td time) has elapsed since the detection signal was supplied from the detector 2, the control unit 21 determines that the leading edge of the banknote P has been conveyed to point A, and the value of the counter 22 at this time is "4". Load. Next, the control unit 21 sets the number of pulses corresponding to the count value to R.
Read from OM23. In this case, the count value is "4" and the number of pulses is "9". As a result, the control unit 21 generates a drive pulse at a frequency corresponding to the number of pulses, and the stepping motor 9
Rotate. Then, the count value of the counter 22 becomes “1”.
3'', the tip of the banknote P is attached to the blades 3a and 3b.
reach the entrance.

As a result, the tip of the bill P is smoothly taken into the bill P in correspondence with the point a between the blades a.

Note that the signal waveforms of the main parts in the above operation are as shown in FIG.

As mentioned above, even if the pitch of the bills being conveyed is various, it is possible to accurately control the rotational position of the blades to always be constant when the tip of the bill reaches the inlet of the accumulating impeller. As a result, banknotes can be taken in smoothly.

Alternatively, both of these may be changed to five pulses of deceleration or acceleration. Also, when changing the frequency during acceleration or deceleration, slow-up and slow-down controls were performed to prevent step-out, but if the range of fluctuation is within the self-start frequency range of the stepping motor, There is no need for the above control, and the frequency may be changed instantaneously.

[Effects of the Invention] As described in detail above, according to the present invention, the relationship between the position of the leading edge of paper sheets and the rotational position of the stacking impeller can be made constant, and the paper sheets can be It is possible to provide a paper sheet stacking device that can ensure that the rotational position of the stacking impeller is the same when it reaches the entrance of the car, and that allows paper sheets to be smoothly taken into the stacking impeller. .

[Brief explanation of the drawing]

Figures 1 to 6 are for explaining one embodiment of the present invention. Figure 1 shows the configuration of the main part of the paper sheet stacking device, and Figure 2 shows the configuration of the stacking impeller. Figure 3 is a schematic block diagram of the main parts of the electric circuit, Figure 4 shows the acceleration,
A diagram for explaining the frequency of the drive pulse during deceleration, Figure 5 is a diagram for explaining the optimal intake position by the integrating impeller, and Figure 6 is a signal waveform diagram for explaining the main parts of the operation. FIG. 7 is a diagram for explaining a conventional method of changing the frequency of a stepping motor. DESCRIPTION OF SYMBOLS 1... Conveyance path, 2... Detector, 3... Accumulating impeller, 3a, 3b... Vane plate, a~... Vane, 4...
- Accumulating unit, 6.10... Pulley, 7... Timing plate, 9... Stepping motor, 11... Timing belt, 21... Control unit, 22... Counter, 2
3...ROM, 24°25...driver. Applicant's agent Patent attorney Takehiko Suzue Figure 3, Figure 4!11

Claims (6)

[Claims] (1) In a paper sheet stacking device that stacks paper sheets conveyed from a conveyance path by sandwiching them one by one between the blades of a stacking impeller and guiding them to a stacking section, a drive that drives the stacking impeller. means, a drive amount detection means for detecting the amount of drive by the drive means, a conveyance detection means provided on the conveyance path for detecting paper sheets conveyed on the conveyance path, and a conveyance detection means for detecting a sheet conveyed on the conveyance path; a control means for driving the drive means at a conveyance speed according to a detection result by a drive amount detection means at a time. (2) The set position of the conveyance detection means is a position when the previous paper sheet on the conveyance path corresponds to the blade of the accumulating impeller. The paper sheet stacking device described. (3) The paper sheet stacking device according to claim 1, wherein the drive amount detection means detects which position between the blades corresponds to a conveyance path. . (4) The sheet stacking device according to claim 1, wherein a conveyance speed corresponding to the drive amount by the drive amount detection means is stored in a table. (5) The paper sheet stacking device according to claim 1, wherein the driving means drives the stacking impeller using a stepping motor and a timing belt. (6) The paper sheet stacking device according to claim 4, wherein the conveying speed is the number of steps of a stepping motor.