JPH0742022B2 - Paper sheet stacking device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a paper sheet stacking device that stacks paper sheets that have been conveyed one by one, and in particular ensures that the blades are taken into the impeller. The present invention relates to a paper sheet stacking device suitable for carrying out.

[Conventional technology]

In a conventional device of this type, as described in, for example, Japanese Patent Application Laid-Open No. 59-153756, an impeller rotates by sequentially inserting paper sheets conveyed by a conveying means between the blades and stacking them. The paper sheets inserted between the blades were removed near the box, and the paper sheets were collected in the collection box.

Further, as in the apparatus described in Japanese Patent Laid-Open No. 61-130160, when the paper sheets are conveyed at regular intervals, between the continuous blades, and in the case of double feeding, the impeller The speed was reduced and the paper sheets were taken between the blades and accumulated in the accumulating device.

[Problems to be solved by the invention]

In such a device, when the preceding paper sheet is insufficiently inserted between the blades or when the conveyed paper sheet has a skew or double feed, the following paper sheet should be inserted. A part of the paper sheets preceding the entrance between the wings will remain. As a result, the succeeding paper sheets may interfere with the preceding paper sheets and may not be captured between the blades and may not be normally accumulated.

An object of the present invention is to provide a paper sheet stacking device capable of normally stacking paper sheets regardless of the transportation state of the paper sheets and the inserted state of the paper sheets between the blades of the impeller. To do.

[Means for solving problems]

The purpose is to convey an impeller having a plurality of blades on the circumference for accumulating the conveyed paper sheets, and to rotate the paper sheets fed between the blades together with the impeller. The impeller driving means, a separating means for separating the transferred paper sheets from the impeller again, and the paper sheets conveyed by the conveying means to the paper sheet intake side of the impeller. Between the blades of the blade and the conveying state at the time of capturing, the detecting means for detecting the rotation phase of the impeller, and the paper sheets taken into the impeller based on signals from these detecting means. In a paper sheet stacking device comprising a control means for selecting a method of taking in between the blades according to the transportation state and controlling the speed of the impeller by the impeller driving means, the control means is configured so that the paper sheets being conveyed are normal. Transport to If it is present, it is taken in between the blades that have skipped one blade, and if the paper sheets are conveyed in a skewed manner, they are taken in between the continuous blades, and the paper sheets are conveyed in an overlapping manner. In some cases, it is achieved by controlling the speed of the impeller so that the paper sheets are taken in between the same blades.

[Action]

When the paper sheets are taken into the impeller in a skewed or double-fed state, the rotational phase of the impeller is controlled accordingly, and the paper is fed by a small feeding resistance between the blades, and The space between the sheet and the succeeding paper sheets becomes large, and mutual interference hardly occurs.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. Belts 1 and 3 are rubber belts and are wound around rollers 2 and 12 and 4 and 14 with initial tension. The rollers 12 and 14 are rotatably provided with respect to the shafts 12a and 14a. The rollers 2 and 4 rotate integrally with the shafts 2a and 4a. Axis 2a, 4a
Is connected to another drive means (not shown). The above-mentioned belts 1 and 3 are impellers 5 that rotate so as to face each other and come into contact with each other.
Place a space 5 on the side of. A stopper 6, which is a detaching means for detaching the paper sheets from the impeller 5, is fixed to the stacking box 7, and is arranged on the side of the impeller 5 so as to enter the impeller 5 in the radial direction. The accumulation box 7 is vacant above the impeller 5 and even when a predetermined paper sheet 8 is accumulated, the upper surface of the paper sheet 8 has a depth such that it does not come into contact with the impeller 5. Have It is a detection unit that detects the timing and the conveyance state of the paper sheets taken into the impeller 5. The sensors 9 and 19 are transmissive sensors and the light emitting part 9a
And a light receiving portion 9b (the light emitting portion and the light receiving portion of the sensor 19 are not shown)
The output voltage of the light receiving unit 9b changes when a light blocking member such as a paper sheet is interposed between the light emitting unit 9a and the light receiving unit 9b. Although not shown, the sensor 19
The same applies to the operations of the light emitting unit and the light receiving unit in. These sensors 9, 19 are on the side of the belt 3 and
The sheets sandwiched between 1, 3 are arranged at a position where they can pass between the light emitting part and the light receiving part of the sensors 9, 19. The impeller 5 described above is rotatably supported by the housing 16 integrally with the shaft 15. The impeller 5 has blades 5a, 5 having a curvature on the outer circumference thereof.
The a ', 5b, 5b', etc. are arranged at equal pitches on the circumference. On the other hand, the shaft 15 of the impeller 5 is connected to a motor 10 having a built-in encoder 11 which is a detecting means for detecting the rotational phase of the impeller 5.

The rotation control of the impeller 5 is performed by the following configuration. The impeller 5 having the blades 5a, 5a ', 5b, 5b' ... at equal pitches on the circumference is rotationally driven by an impeller drive motor 10. Axis of impeller 5
15 is connected to the encoder 11. The encoder 11 detects whether the impeller 5 is at a position where it is rotated somewhat from the reference position (hereinafter, referred to as a rotation phase). The impeller drive motor 10 described above uses the conveyance position of the paper sheet detected by the sensors 9 and 19 and the rotational phase of the impeller 5 obtained from the encoder 11 as shown in FIG. When a sheet arrives at the impeller 5, a predetermined rotational phase (θ _{1 to} θ ₁ + θ) between the second blade (the blades 5a and 5a 'in FIG. 3) from the blade inserted by the preceding paper sheet. ₂ ) It has an arithmetic circuit or a table for speed control so that the paper sheets following it may plunge, and the rotation control of the impeller 5 is performed by this.

Next, the sheet stacking operation in the above-described embodiment will be described.

The conveyed state of the paper sheet conveyed by the belts 1 and 3 is detected by the sensors 9 and 19.

First, when the outputs of the sensors 9 and 19 change from light to dark at the same time, the sheet is normally conveyed. In this state, the speed control of the impeller 5 is performed based on the signal from the sensor 9 or 19 and the signal from the encoder 11. FIG. 4 is a flow chart of the control means for controlling the speed of the impeller 5 based on the signal from the sensor 9 or 19 and the signal from the encoder 11 described above.

The conveyance position of the paper sheet and the rotation phase of the impeller 5 detected by the sensor 9 or 19 and the encoder 11 are respectively calculated by an arithmetic circuit.
Added to 21. The arithmetic circuit 21 obtains the difference Δθ between the predicted rotation phase of the impeller 5 and the control target value when the paper sheet reaches the impeller 5 based on these signals. Then, due to this Δθ, the impeller drive motor control circuit 22 increases the rotation angle of the impeller 5 to be controlled by Δθ.

As a result, the impeller 5 takes in one sheet between the two blades and the paper sheets in a predetermined region between the blades (target rotation phase region θ _{1 to} θ ₁ + θ ₂ ).

FIG. 5 shows the conveyance state of the paper sheets that are nipped and conveyed based on the light and dark signals of the sensors 9 and 19 described above,
3 is a flow chart of speed control means for controlling the speed of the motor 10. FIG.

Paper sheets that are nipped and conveyed by belts 1 and 3 are
When passing through 9,19, the time when the output of the sensor 9,19 changes from light to dark changes according to the transport state. That is, when the paper is conveyed without skew, the sensors 9, 19
Both output change from light to dark at the same time,
If they are conveyed in a skewed or double-feed state, there will be a difference in the output change time from light to dark of the sensors 9 and 19. In this case, the impeller 5 is controlled as shown in the flow chart of FIG. Now, the time when the output of the sensors 9 and 19 changes from light to dark is t
_{With 1} and t ₂ , the difference between the times t ₁ and t ₂ is first obtained by the subtractor 23. Further, the selection circuit 24 monitors the dark paper duration time t _υ of the sensor output of the sensors 9 and 19 that has changed from light to dark first, and the arithmetic circuit 25 monitors the output from the sensors 9 and 19. The dark continuation time t _S of the sensors 9 and 19 is calculated from the time t ₁ and t ₂ at the time of change, from the transport speed Vm / s of the paper sheet, assuming that the paper sheet is transported in a skewed state. Next, this calculation result and the dark duration time t _L of the actual sensor output are compared by the comparator 26, and if the difference t _A between these times is positive, it is judged as a double feed state and the rotation speed of the impeller 5 is reduced. Then, these paper sheets are taken in between the same blades, and if the time difference t _A is zero or a negative value, it is judged as a skew state, the rotation speed of the impeller is controlled to a predetermined value, and this paper sheet and the succeeding paper sheets are controlled. And between the other blades or between the next blade after skipping one blade. Sensors 9 and 19 calculated by the above-described arithmetic circuit 25 when the leading edge of the paper sheet passes
From the times t ₁ and t ₂ when the output of the light changes from dark to light, the dark time predicted value t _S of the sensor 19 assuming that the paper sheet is skewed is the conveyance speed Vm / s of the paper sheet and the paper sheet. Uniquely determined from the size of the kind, However, Wo: width of paper sheet in the conveying direction.

 B: Amount of misalignment of paper sheets due to skew.

 S: The distance between the sensor installation positions.

Can be expressed as

With the above configuration, the following operation becomes possible. That is, when the paper sheets nipped and conveyed by the belts 1 and 3 have no skew or double feed, they are inserted between the blades of the impeller 5 within a predetermined area, and between the blades 5a and 5a '. 5b and 5
One sheet is taken into the impeller during b ', and when the conveyed paper sheets are in a skewed state, they are taken into a predetermined area between adjacent blades. Further, when the sandwiched conveyed paper sheets are in the double feed state, the rotation speed of the impeller 5 becomes lower than the rotation speed in the normal conveyance state, and these paper sheets are taken in between the same blades. . The paper sheets taken into the impeller 5 are transferred with the rotation of the impeller 5, then locked by the stopper 6 and separated from the impeller 5 again to be stored in the stacking box 7.

According to this embodiment, the paper sheets can be sent between the blades of the impeller with a small resistance regardless of the state of conveyance of the paper sheets being conveyed, and the paper sheets can be moved to a sufficiently deep position between the blades. In addition to accumulating paper sheets with good alignment,
Even if a paper sheet is conveyed in a skewed state or a double-feed state, or if it cannot be captured with a sufficient depth between the blades, it is possible to prevent interference with subsequent sheets and perform a normal stacking operation. Is possible.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, paper sheets can be normally accumulated regardless of the conveyance state of the conveyed paper sheets and the insertion state of the paper sheets between the blades of the impeller.

[Brief description of drawings]

FIG. 1 is a schematic side view for explaining an embodiment of the present invention, FIG. 2 is a schematic front view of an essential portion of FIG. 1, and FIG. 3 is a view for explaining a rotation phase of an impeller in FIG. 4 and 5 are flow charts for explaining the rotation control of the impeller in the embodiment shown in FIG. 1,3 …… Belt, 5 …… Impeller, 9, 19 …… Sensor, 10…
... impeller drive motor, 11 ... encoder, 21 ... arithmetic circuit, 22 ... impeller drive motor control circuit, 23 ... subtractor,
24 …… Selection circuit, 25 …… Calculation circuit, 26 …… Comparator.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Itsuki Utami, Ikegami No. 1, Haruoka-cho, Owariasahi-shi, Aichi Prefecture Asahi Factory, Hitachi, Ltd. (56) References JP-A-61-130160 (JP, A) 60-11866 (JP, Y2)

Claims (1)

[Claims] 1. An impeller in which a plurality of blades are arranged on the circumference for accumulating conveyed paper sheets, and paper sheets fed between the blades are rotated together with the impeller to be transferred. The impeller driving means, the separating means for separating the transferred paper sheets from the impeller again, and the paper sheets conveyed by the conveying means to the paper sheet intake side of the impeller. Detecting means for detecting the timing of taking in between the blades of the car and the transport state at the time of taking in, detecting means for detecting the rotational phase of the impeller, and paper sheets taken into the impeller based on signals from these detecting means In the paper sheet stacking device, which comprises a control means for selecting the method of taking in between the blades according to the transport state and controlling the speed of the impeller by the impeller driving means, the control means Transfer normally If it is present, it is taken in between the blades that have skipped one blade, and if the paper sheets are conveyed in a skewed manner, they are taken in between the continuous blades, and the paper sheets are conveyed in an overlapping manner. In some cases, the paper sheet stacking device is characterized in that the speed of the impeller is controlled so that the paper sheets are taken in between the same blades.