JPH0362621B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a paper sheet sorting device that can selectively change the conveyance direction of paper sheets being conveyed by a belt at high speed.

[Technical background of the invention and its problems]

For example, paper sheets such as data cards and bank notes are usually stored in a stacked state, and such paper sheets are recorded and classified by information field.
To sort by a predetermined number of sheets, one by one is taken out and sent to a conveyance path, and on the way to this conveyance path, information on the sheet is read or the number of sheets passing is counted, and then It is necessary to change the conveying direction for each piece of information contained in the paper sheet or for each predetermined number of sheets, and to stack the sheets again in a stacked state.

As a method for transporting paper sheets, there is a belt transport method in which the paper sheets are taken out one by one and are held between a pair of belts running in contact with each other and transported to a predetermined position. Conventionally, in order to switch the conveyance direction of paper sheets to be conveyed according to the above-mentioned request using such belt conveyance, the following configuration is most commonly adopted. That is, in the middle of the conveyance path, the conveyor belts that are running in contact with each other are separated from each other and the conveyor belts are traveling in a skirt-like manner. Two guide pulleys are provided inside the conveyor belt that spreads out in the shape of a skirt, and each of these two guide pulleys is separately in contact with each belt of the pair of conveyor belts that spread out in the shape of a skirt, so that each of the two guide pulleys is provided with an independent pulley. A belt forming a first conveyance path and a second conveyance path is wound around the belt. In a substantially triangular space formed by the conveyor belt forming a skirt-like extension and the two guide pulleys, there is a separator that is angularly displaced in forward and reverse directions around an axis parallel to the axis of the guide pulley. This is the arranged configuration. This separator is shaped like a triangular prism with triangular sides, and is rotated forward or reverse depending on a switching command signal to the separator, so that the separator can be rotated forward or backward to connect one side of the separator to one of the conveyor belts forming a skirt-like extension. Paper sheets are conveyed through this gap. Then, it is fed into a conveyance path where one of the conveyor belts is in contact with a conveyor belt wound around a guide pulley located behind the separator, where it is pinched and conveyed to a predetermined position. Conventionally, a rotary solenoid or a motor capable of forward and reverse rotation has been used as a drive source for angularly displacing the separator in forward and reverse directions. A rotary solenoid is a linear solenoid that mechanically converts rotational motion into rotational motion. When using this method, a spring is used to force the reversal, and a pair of rotary solenoids that operate in the same manner are coaxially connected in opposite directions, and either one of the solenoid There is one that obtains forward and reverse rotation by exciting it. In addition, in the case where a motor capable of forward and reverse rotation is used, an external stopper is provided in order to obtain a constant angular displacement of the separator, and an arm attached to the rotating shaft hits the stopper to perform forward and reverse positioning.

The paper sheet sorting apparatus having the above-mentioned configuration has the following disadvantages because the separators are positioned by displacing the separators at a certain angle.

The number of parts increases, making the configuration extremely complex and increasing costs. In other words, a drive source that uses a rotary solenoid requires a spring or an additional rotary solenoid for forward and reverse rotation, and a drive source that uses a forward and reverse motor requires an arm and a stopper for positioning. Furthermore, the number of required parts increases.

Second, the separator has the disadvantage of poor high-speed response for forward/reverse switching. With spring type motors, the spring force is always acting in one direction, so if the spring is used to achieve reverse rotation, extra force must be generated to overcome this spring force during forward rotation, resulting in poor high-speed response. Become. When a pair of rotary solenoids are used, the solenoid becomes larger and the rotating part becomes longer (two parts), which increases the weight of the rotating part and increases the moment of inertia. In addition, when a forward/reverse motor is used, an arm is attached to the rotating shaft for positioning, which increases the weight of the separator due to the increased moment of inertia. This becomes a major obstacle to speeding up.

Due to the additional force applied to the shaft or the increased weight of the configuration, the power supply capacity is increased in all rotary shaft drive systems. In particular, with spring-type solenoids, the current cannot be maintained unless the current is maintained for an amount corresponding to the spring force, which can lead to problems with heat generation, and the rotating shaft vibrates at the end of the operation, which takes time to suppress the vibration. It takes,
It is not possible to set the exact position instantly.

In addition, in the case of a motor that uses a forward/reverse motor, positioning is performed by hitting the arm attached to the rotating shaft against the stopper. The separator may be damaged, a special material is required for the arm, the vibrations generated during a collision do not subside instantly, and the separator cannot be positioned accurately. There were drawbacks such as the paper becoming unstable and incoming paper sheets hitting the vibrating separator, causing jams. Furthermore, since the structure of the separator is approximately triangular prism-shaped, the separator has a large inertia, which is a major cause of hindering speed-up.

[Purpose of the invention]

The present invention has been made in view of these circumstances, and its purpose is to provide a paper sheet sorting device that can change the conveyance direction of paper sheets being conveyed by a belt at high speed. .

[Summary of the invention]

According to the present invention, the first guide pulleys are provided facing each other in the middle of the conveyance path, and the first guide pulleys, which are guided by the guide pulleys, leave contact with each other, and each travel in a skirt-like manner. and a second main conveyor belt, and a second guide pulley located inside the main conveyor belt that expands into a skirt shape.
First and second auxiliary conveyor belts, which form a pair with the main conveyor belt wrapped around the second guide pulley and spread out in the form of a skirt, respectively, forming first and second conveyance paths, and skirt-shaped A switch that performs angular displacement in the forward and reverse directions around an axis parallel to the axes of the first and second guide pulleys, which is provided in a space formed between the main conveyor belt and the second guide pulley, which form a pair that spreads out. When the switching piece is angularly displaced in one direction or the other, one end of the separator is stopped by a part of the first guide pulley to position the angularly displaced separator.

Further, the separator is constructed by integrally fixing a plurality of switching pieces each having a cross section approximately in the shape of an alpha alphabet "A" at the center of the rotating shaft. The motor that drives this switching piece has a part of its magnetic circuit with low magnetic resistance and uses a permanent magnet in its rotor.

〔Effect of the invention〕

By configuring the paper sheet sorting device as described above, the number of parts of the device can be kept to the necessary minimum, and the separator is locked using the tip of the separator itself, so the following There is a similar effect.

This eliminates the need for movable members such as stopper arms that move integrally with the separator, making it possible to create a structure in which the separator is simply added to a single motor rotor, reducing the weight of the movable parts and enabling high-speed response. This shortens the operating time of the separator, and (A) when the belt conveyance speed is kept at the conventional speed, the number of sheets fed between the belts per unit time is increased and the pitch of the sheets conveyed is reduced. It is now possible to separate paper sheets even during transport, increasing the paper transport density and improving paper processing capacity per unit time. In this case, it becomes possible to separate the sheets even if the conveyance speed is increased, which has the effect of improving the throughput of sheets per unit time.

The distance between the locking position and the center of rotation of the separator can be effectively increased, and the impact force applied to the locking member (separator and first guide pulley) that locks the separator in response to rotational torque of the separator including the motor rotor can be reduced. This increases reliability and extends life.

The separator rotation shaft can be placed sufficiently away from the separator surface through which paper sheets pass, so even if the leading edge of the paper sheet being conveyed is torn, it will not hit the separator rotation shaft on the part that protrudes from the separator, and the jam will be prevented. Occurrence can be prevented.

The distance between the first guide pulley and the second guide pulley can be shortened (even if the separator size is the same as before, the first guide pulley is shifted to the second guide pulley side). (As a result, the distance between the first and second pulleys becomes narrower), the distance that the paper is guided by the separator becomes shorter, and the paper sheets being conveyed become very strained.
Even if the sheet is a weak sheet, the frequency of folding, wrinkles, etc., or jamming at the leading end of the sheet due to being guided and decelerated by the separator can be reduced to almost zero.

Furthermore, in addition to these effects, a forward-reverse rotation motor is used to drive the separator, and a permanent magnet is used in the rotor, so the motor itself locks when the separator is locked with the first guide pulley. Since it has the torque to hold the position, even if the motor is not energized or even when energized, the locking position is reliably maintained with only a very small current flowing, which helps save power. Another effect is that high speeds can be achieved without considering the problem of heat generation in the motor.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic overall configuration diagram showing an example of a paper sheet processing device equipped with a paper sheet sorting device of the present invention. That is, this device is broadly divided into a feeding device 1 that takes out paper sheets one by one from a stack of paper sheets and feeding them out, and a transfer device 2 that transports the paper sheets sent out from this feeding device 1 . , a collection device 3 that receives and stacks the paper sheets transferred by the first transfer device 2 one by one, and sends out this stacked layer.

The above-mentioned feeding device 1 includes a paper sheet loading table 17 which is mounted on a side surface of a vertical wall 12 of a mounting base 11 and which is controlled to rise and fall as shown by a solid line arrow 16 in the figure by a lifting mechanism 15 comprising a motor 13 and a ball screw 14.
and above the paper sheet mounting table 17,
Paper sheet stack X placed on the paper sheet mounting table 17
A rotary drum 18 is provided for suctioning and moving the paper sheets Y located at the top of the screen sequentially toward the left in the figure. The rotating drum 18 has an axial length smaller than the width of the paper sheet Y, is supported by a shaft extending perpendicular to the plane of the paper, and is rotationally controlled in the direction indicated by a solid arrow 19 in the figure. . Further, suction holes 20a and 20b are formed at two opposing locations on the peripheral wall of the rotating drum 18, respectively. Furthermore, inside the rotating drum 18, there is a suction nozzle 22 with a suction port 21 facing the inner surface of the drum peripheral wall.
is fixed stationary, and this suction nozzle 22 is connected to a suction pump 23. Therefore, this feeding device 1 has a suction hole 2 of the rotating drum 18.
Each time 0a, 20b passes the front surface of the suction port 21 of the suction nozzle 22, the paper sheet Y located in the uppermost layer is attracted to the circumferential surface of the rotary drum 18, and in this state, the paper sheet Y is caused to rotate as the rotary drum 18 rotates. The paper sheet Y is moved to the left in the figure. In addition, 24 in the figure
is a stack of paper sheets X placed on the paper sheet mounting table 17
A limit switch 25 is used to obtain a control signal to keep the height of the paper sheets Y located at the top layer of the stack X constant. It shows a spray nozzle that performs so-called "judgment" by spraying toward the end surface where it is located, and 2
7 is connected to the suction pump 28 and rotates the drum 18
It shows a suction duct that prevents two or more sheets of paper from being attracted to each other.

Thus, the paper sheets Y sent out from the above-described sending device 1 are sent to the first transfer device 2 . This first transfer device 2 includes a rotating drum 18
It is composed of two sets of so-called belt-type conveyors extending in parallel from the vicinity of both end faces to the left in the figure. Each set of conveyors consists of main conveyor belts 31a and 31b (hereinafter simply referred to as belts) which circulate in pairs above and below, and auxiliary conveyor belts 32 and 33 (hereinafter simply referred to as belts) which circulate in contact with these belts. ) and guide pulleys 34a, 34b, 34c,...34 that guide these belts.
It is mainly composed of s. belt 31a
The belt 31 is circulated by the guide pulleys 34a and 34b as shown by the solid line arrow 35 in the figure by a route that turns back near the end surface of the rotating drum 18.
The guide pulleys 34i, 34h, and 34g circulate around the lower left side of the rotary drum 18 as shown by the solid line arrow 36 in the figure. The belts 31a and 31b are in close contact between the guide pulleys 34g and 34n, and
A V-shaped clamping opening 37 is formed on the right side of the guide pulley 34g in the figure. The belt 31b
is formed to be shorter than the belt 31a, and the guide pulley 34n ¹ is located at a position closer to the rotating drum 18 than the folded position on the left side in the figure of the belt 31a.
It is folded back by And the belt 3
3 is stretched over the guide pulleys 34o and 34p so as to partially contact the belt 31b moving between the guide pulleys 34n ¹ and 34m, and is shown by the solid line arrow 38 in the figure.
The first discharge port 39 is circularly moved in the direction indicated by , and a first discharge port 39 is formed at the most extreme end of the contacting portion in the direction of movement. Similarly, the belt 32 is also connected to the guide pulley 34.
The guide pulleys ^34q , 34r, 34 are arranged so that a part of the belt 31a moves between the guide pulleys 34q, 34r, and 34c.
s and circulates in the direction shown by the solid line arrow 40 in the figure, forming a second discharge port 41 at the most extreme end of the contacting portion in the direction of movement. Each belt 31a, 31b, 32, 33 is connected to intermediate pulleys 43a, 43b provided on the back side of the mounting base 11, through which the rotational force of a motor 42 provided on the back side of the mounting base 11 forms a rotational force transmission mechanism. Specific guide pulleys 34e, 34f, 34 via 43c
A shaft protruding from the back side of the mounting base 11 of 1 receives a force via a drive belt, and is driven in each of the above-mentioned directions at a predetermined constant speed. Note that the rotating drum 18 is also rotationally driven via an intermediate pulley 43d that transmits rotation from the intermediate pulley 43b of the rotational force transmitting mechanism 43 to the rotating drum 18. Therefore, the paper sheet Y sent out by the rotating drum 18 is fed into the nipping opening 37 formed between the belts 31a and 31b, and then is held between the belts 31a and 31b. It is transferred to the left in the figure. When the belt 3 passes through the guide pulleys 34n ¹ and 34n ² , the separator 44
1b and the belt 33 are in contact, or the belt 31a and the belt 32 are in contact with each other. It is discharged diagonally downward from the discharge port 41. The paper sheets Y thus discharged are sent to the collection device 3.

The recovery device 3 includes a first recovery device 47 provided below the first outlet 39 and a second outlet 4.
1 and a second collector 48 provided below. The first and second collectors 48 are each equally formed, and taking the first collector 47 as an example, the configuration is as follows.
That is, the first collector 47 is supported in parallel to each other by axes provided directly below the first discharge port 39 and extending in a direction perpendicular to the plane of the paper, and rotates in the direction indicated by a solid line arrow 51a in the figure. A pair of recovery wheels 54a, 54b, so-called recovery stands 47b, 48b which are provided below the recovery wheels 54a, 54b and whose bottom plates are movable up and down, and upper ends of side walls of the recovery stands 47b, 48b located on the rotating drum 18 side. The stop plates 47c and 48c extend from the center to the vicinity of the center between the collection wheels 54a and 54b. The collection wheels 54a and 54b have a plurality of grooves 4 in the shape of an involute curve extending in the counter-rotation direction.
7d is formed. And each collection wheel 54
a and 54b are fixed to the shaft with the rotational direction positions of the grooves 47d aligned. In addition, the collection wheels 54a and 5 of the first and second collection devices 47 and 48
4b is connected to the rotating drum 18 via the drive belt and intermediate pulley 43e from the above-mentioned rotational force transmission mechanism.
The collection wheels 54a and 54b are rotated by one-half the number of grooves per half rotation of the groove. Therefore, for example, when a paper sheet Y is discharged from the first discharge port 39, this paper sheet Y is transferred to the collection wheel 5.
It advances into the groove 47d provided in the groove 4a, and finally begins to rotate together with the collection wheel 54a with most of it entering the groove 47d. Then, when it rotates to a certain position, the paper sheet Y
The leading end of the paper sheet Y hits the stop plate 47c, and the rotation of the paper sheet Y is forcibly stopped. Since the collection wheel 54a rotates at a constant speed, the paper sheet Y that had entered the groove 47d gradually slips out of the groove 47d from the rear end side, and finally comes out completely. Thereafter, it falls onto the bottom plate of the recovery platform 47b due to its own weight. Therefore, the paper sheets Y are accumulated one after another on the bottom plate. According to this device, the number of paper sheets Y entering the collection wheels 54a and 54b is counted using a counting device (not shown) consisting of, for example, a photo coupler and a counter, and this counted value is determined. For example,
When it reaches 100, switch the separator 44,
Thereafter, the transported paper sheets Y are transferred to the second transport path 4.
6 side, and at the same time the bottom plate of the collection stand 47b of the first collection device 47 (this is in multiple rows).
descend.

FIG. 2 is an enlarged side view showing an embodiment of the sorting device of the paper sheet processing apparatus in FIG. 1 of the present invention, and FIG. FIG. 4 is a plan view showing a cross section with a part cut away when viewed from the viewing direction; FIG. 4 is a schematic configuration diagram showing an example of the principle configuration of the drive motor and its control circuit in the present invention; FIG. , shows the torque characteristic curve of the drive motor in the present invention, FIG. 7 is a waveform diagram for explaining the operation of the present invention, and FIG. 9 is a longitudinal sectional view taken along a line and viewed in the direction of the arrow, and FIG. 9 is a longitudinal sectional view showing one operating state of the sorting device of the present invention in FIG. 8.

That is, in FIG. 2, the belts 31a,
The belt 31b is formed by a pair of belts 31a ¹ , 31a ² , 31b ¹ , and 31b ² arranged vertically in parallel. Then, the contact between the belts 31a ¹ - 31b ¹ is separated and the guide pulleys 34n ¹ and 34n ² and the respective belts 31a and 3 form a skirt-like expansion.
A space 5 located inside 1b and having an approximately triangular outline
The guide pulleys 34q and 34p forming the third
As shown in the figure, a cylindrical support shaft 5 is fixed in parallel to a mounting base 11 that constitutes a part of the pulley.
Bearings 57, 55, 5 on 1, 52, 53 respectively
It is rotatably supported via 6. At approximately the center of the space 50, a rotating shaft 61 of a drive motor 60 fixed to the back side of the mounting base 11 rotates the mounting base 11 to belts 31a ¹ and 31b ¹ located on the side away from the mounting base 11. Its end extends through. This rotating shaft 61 is located within the space 50 as shown in FIG. A belt 31 runs parallel to this rotating shaft 61.
A separator 44 located between a ¹ , 31b ¹ and 31a ² , 31b ² is fixed. The separator 44 has a shape similar to the contour of the space formed between the guide pulley and the respective belts 31a and 31b forming a skirt-like extension, for example, the shape of the letter "A" in the alphabet. The switching pieces 62 and 63 are used, and this switching piece 6
2, 63 apex side with belts 31a ¹ , 31a ² and 31
The switching pieces 62 and 63 are positioned so as to face the superimposing point side of b ¹ and 31b ² , and the side surfaces of the switching pieces 62 and 63 are parallel to the belt. Further, each of the switching pieces 62 and 63 is fixed by a connecting portion 64 in a positional relationship such that the switching pieces 62 and 63 are moved in parallel on the rotating shaft 61 to which the switching pieces 62 and 63 are fixed, and this connecting portion 64 is fixed to the rotating shaft 61. There is. The switching pieces 62 and 63 are made of a material having a low specific gravity and a low coefficient of friction, such as a processed product such as resin. The drive motor 60 has a rotor 70 connected to a rotating shaft 61, the principle structure of which is shown in FIG.
The rotor 70 is made of a permanent magnet and is surrounded by a stator 73 made of a material with low magnetic resistance and having two magnetic poles 71 and 72 at opposing positions.
Coils 74 and 75 each having the same number of turns in the same direction are connected in series to the magnetic poles 71 and 72, and a DC power supply circuit 76 is connected to both ends of the coils. That is, 74,
The wire 75 is wound so that when energized, the magnetic poles 71 and 72 exhibit magnetism with polarity in the same direction. The rotating shaft 61 has a rotor 70 made of permanent magnets and magnetic poles 7.
It rotates due to attraction and repulsion with the magnetism generated at 1 and 72. If the direction of the current flowing through the coils 74 and 75 is changed, magnetism with opposite polarity is generated in the magnetic poles 71 and 72, and the rotating shaft 61 rotates in the opposite direction. That is, since the magnetic poles 71 and 72 are provided at opposing positions on the stator 73, when the coil is not energized, the magnetic poles of the permanent magnets are the magnetic poles 71 and 72 provided on the stator 73.
Since the suction force is maximum when facing the rotor 72, the rotation of the rotor 70 stops at this position. In other words, the rotating shaft 61 has two opposing static positions facing the magnetic poles 71 and 72. Therefore, as shown in FIG.
A force F parallel to the axes 1 and 72 is received by the magnetic pole 71 as an attractive force and the magnetic pole 72 as a repulsive force. As shown in Figure 6, the radius of the rotor 70 is R, and the magnetic poles 71, 72
When the angle of the rotor 70 with respect to the axis is θ, the rotational torque of the rotor 70 is T=FRsinθ. From this point on, the rotor 70 rotates with a torque characteristic curve as shown in FIG. Therefore, the rotational torque is maximum at θ=90°, that is, when the rotating shaft 61 rotates 1/4 from one stationary position to the other stationary position. That is, in the present invention, the switching piece acts as an arm, and a part of the pulley including the support shaft acts as a stopper, and the point where the maximum torque passes is the point where the center of the rotating shaft 61 and the belts 31a, 31b in the space 50 contact. It is located on the line connecting the points.

According to the present invention, when the rotating shaft 61 rotates, the switching pieces 62 and 63 formed integrally therewith also rotate.
Switching pieces 62, 63 when rotated to one side or the other
As shown in FIGS. 8 and 9, the switching piece 62,
The tip of 63 is the pulley 34n ¹ or the pulley 34
It is arranged in a relationship that it contacts a part of either one of ⁿ² . Therefore, the switching pieces 62, 63 are the pulleys 34n ¹
Alternatively, either one of the pulleys ³⁴ⁿ² is locked, and the rotation of the rotating shaft 61 is restricted. At this time, coil 7
Even if the current flowing through the switches 4 and 75 is cut off, the magnetic attraction force of the permanent magnets is still working, so that the switching pieces 62 and 63 are held stationary at the position where they are locked by the pulley 34n ¹ or pulley 34n ² . The DC power supply circuit 76 has a circuit as shown in FIG. That is, 80 is a DC power supply, and the collector sides of NPN transistors 81 and 82 are connected in parallel to the + side of this power supply.
The emitter sides of these transistors 81 and 82 are further connected to the collector sides of NPN transistors 83 and 84, respectively, and the emitter sides are connected to one side terminal of the power source 80. The respective transistors 81,
82, 83, and 84 are diodes 88a, 88b, and 84 that are independently connected to each other so that the DC power applied between the collector and emitter is reverse biased.
8c and 88d are connected. The emitter collectors of the transistors 81 and 83 and the emitter collectors of the transistors 82 and 84 are connected to both ends of the series connected coils 74 and 75, respectively. and transistors 81,8
A control signal from a gate circuit 85 is supplied to the base of transistor 4, and a control signal from a gate circuit 86 is supplied to the bases of transistors 82 and 83. For example, the main conveyor belts 31a, 31 in FIG.
When a control signal is received from the paper sheet detection unit 49 provided in the transport area b, the gate circuit 85 directly supplies the signal to the transistors 81 and 84, and the gate circuit 86 receives a signal inverted by the inverter 87. and passes that signal through the transistor 8
2, 84, the transistor 8
1, 82, 83, and 84 are controlled to be conductive or nonconductive in a predetermined mode to energize the coils.

Next, the operation of the paper sheet sorting device configured as described above will be explained with reference to the operation waveform diagram of FIG. 7 and FIGS. 8 and 9.

First, let us consider before driving the drive motor 42, pumps 23, 28, and compressor 26. In this state, the switching pieces 62 and 63 are connected to the rotation shaft 6 of the motor 60.
Due to the torque characteristics shown in FIG. 5 due to the action of the permanent magnet 70 attached to 1, the tips of one side 62b, 63b of the switching pieces 62, 63 are locked to the guide pulley ³⁴ⁿ² as shown in FIG. It is still.
In FIG. 1, paper sheets X are now stacked on the paper sheet mounting table 17 in a stationary state as shown in FIG. Then, the drive motor 4 is operated from the operation section (not shown).
2. Drive compressor 26 and pumps 23 and 28. As a result, the intermediate pulleys 43a, 43b, 4
3c, 43d, 43e, drive belts, and guide pulleys 34a, 34b, .
The compressor 26 blows compressed air from the blowing nozzle, and at the same time the pumps 23 and 28 blow the compressed air to the suction nozzle 2.
The outside air is sucked out from the suction port 21 of No. 2 and the suction duct 27. In this state, preparations for starting the paper sheet processing operation are completed.

Next, when a switch is activated from an external operation unit (not shown) to drive the motor 13 for raising and lowering the sheet loading table 17, the rotational movement of the motor 13 is transmitted to the ball screw 14, and the loading table 17 is gently raised. The raising of the mounting table 17 is determined by a limit switch provided at the upper part of the mounting table 17.
This also positions the top layer of the stacked paper sheets X. The uppermost paper sheet Y of the positioned paper sheets 21 and the conveyor belts 31a, 31
It is sent to the polymerization part of b. When the leading edge of the paper reaches the overlapping part of the chiyodo belt, the suction of the paper by the rotating drum 18 is released, and the friction between the transport belt and the paper causes the paper to move to the belt 31a,
31b and travels. By repeating this operation intermittently and continuously, the paper sheets X stacked on the mounting table 17 are continuously taken out. Paper sheets Y that have passed through the detection unit 49 and arrived at the separator 44
When the tip enters the triangular space 50 shown in FIG. 2, the tip becomes free. However, the paper sheet Y whose leading edge is now free tries to move in the conveying direction due to the backing of the belt, but the leading edge of the sheet Y collides with the sides 62a and 63a of the switching pieces 62 and 63, so the conveying direction cannot be changed. Lower belt 31b ¹ , 31
Proceed along b ² . Then, the leading end of the paper sheet Y is fed into the first conveyance path 45 formed between the guide pulley 34p and the auxiliary conveyance belt 33 wound around the guide pulley 34p. The paper sheets discharged from the first conveyance path 45 are received by a collection wheel 54a and accumulated on a collection table 47b.

The operation when it is desired to switch the conveyance direction of the paper sheet being conveyed in this way from the detection unit 49 to the direction shown in FIG. 9 for a predetermined period of time will be described.

That is, as shown in FIG. 7A from the detection unit 49,
A case will be described in which it is desired to maintain the positions of the switching pieces 62 and 63 shown in FIG. 9 and to connect the sheet conveyance operation for the time from _t1 to _t2 . That is, when the power supply circuit 76 is supplied with a control signal from the detection unit 49 shown in FIG.
6, the gate circuit 85 is triggered by the rising edge of the control signal A, and passes a pulse having a pulse width τ ₁ at time t ₁ as shown in FIG. 7B. The control signal RO is then supplied to the bases of the transistors 81 and 84, and as a result, the transistors 81 and 84 become conductive during the pulse width τ ₁ of the control signal RO. At this time, the gate circuit 86 is supplied with a signal obtained by inverting the control signal A by the inverter 87, so the gate circuit 86, which is supplied with the control signal of the falling edge of the pulse, outputs a pulse at the timing of time _t1 . cannot be obtained. Therefore transistors 82,8
3 remains non-conducting. Therefore, the DC current is 80
Current flows from the + side terminal of transistor 81 → coil 7
A current flows in the order of 5→coil 74→transistor 84, forming a closed loop that returns to the negative side terminal of the DC power supply. At this time, the coils 74 and 75 are wound so that the magnetic poles 71 and 72 of the motor 60, which are opposite to the magnetic pole of the permanent magnet 70, have the same magnetism as the polarity of the permanent magnet, so repulsion occurs and the motor rotates. Torque is generated. and rotating shaft 61
rotates, and the direction of the switching pieces 62, 63 is switched. The tip of one side 62a, 63a of the switching pieces 62, 63 is connected to the guide pulley 3.
The rotating shaft 61 is stopped by contacting a part of ⁴ⁿ¹ . When the transistors 81 and 84 are conductive, the polarity generated in the magnetic poles 71 and 72 and the polarity of the permanent magnet 70 are opposite to each other due to different polarity of magnetism. 6
2 and 63 are stationary and locked at that position.
Even when the conduction period of the transistors 81 and 84 with the pulse width τ ₁ has passed and the transistors 81 and 84 become non-conductive, the permanent magnet 70 continues to attract the magnetic poles 71 and 72, so the rotating shaft 61 is rotated by this attractive force. The stationary state is maintained. Then, the paper sheets Y sent from the conveyor belt are transferred to the other side 62b of the switching pieces 62, 63,
63b and the main conveyance belt 31a, and is fed into a second conveyance path 46 formed by the conveyance belt 31b and the belt 32 wound around the guide pulley 34q.

Then, when the time _t2 in FIG. 9, at which the conveyance period for the paper sheet Y ends, arrives, the control signal A becomes a falling control signal. Therefore, there is no particular control signal output from the gate circuit 85. However, since the gate circuit 86, which is supplied with a control signal obtained by inverting the control signal A obtained through the inverter 87, is supplied with a signal at the rising edge, the gate circuit 86 is triggered as shown in FIG. 7C. A control signal with a pulse width τ ₂ is obtained. This control signal C is supplied to the bases of transistors 82 and 83, making them conductive. And from the + side of the DC power supply 80, the transistor 82 → the coil 74
A current flows in the order of →coil 75 →transistor 83, forming a closed loop that returns to one side of the DC power supply 80. The direction of the current flowing through the coils 74, 75 is opposite to that when the transistors 81, 84 are in a conductive state at time _t2 , as shown in FIG. A magnetic pole having the same polarity as that of the permanent magnet 70 is generated, causing repulsion and generating rotational torque in the motor 60. Then, the rotating shaft 61 rotates and the directions of the switching pieces 62, 63 are switched, and as shown in FIG.
The tips of the other sides 62b and 63b of the guide pulley 34n2 are engaged with a portion of the guide pulley ³⁴ⁿ² and remain stationary at that position.

That is, according to the paper sheet sorting operation using the switching pieces 62 and 63 of the present invention, the switching pieces have a configuration in which the switching pieces are approximately in the shape of Alphabet's "A" and are connected at the center of the rotation axis, and the switching pieces can be used even when stationary. Since it has a simple structure that is locked to a guide pulley, the moment of inertia of the movable part is small, and as a result, it starts rotating at high speed in the direction of rotation due to the rotational torque generated by the motor. . When the switching pieces 62 and 63 rotate by a certain angle, they reach the bodies of the guide pulleys 34n ¹ and 34n ² , and
This locks it in place. At this time, the switching piece 62,
Since there is a large distance between the rotating shaft 61 of 63 and the guide pulleys 34n ¹ and 34n ² at the locking position, the separator and guide pulley 34n receive rotational torque of the separator and lock the separator at the time of locking. ¹ or 34n ² is small, and since the rotating shaft 61 is located close to the bottom of the triangular space 50, when the paper passes through it, it is sufficiently far away from the separator surface and cannot be conveyed. Even if the leading edge of the paper sheet torn is torn, it will continue along the surface of the switching pieces 62, 63 without hitting the rotating shaft 61, and the guide pulleys 34n ¹ , 34n ² and 34
Since the distance between p and 34g is shortened, the distance that the conveyed sheet is guided by the switching pieces 62 and 63 is short, and the conveyed sheet is a very weakly strained sheet. Even if the sheet is guided by the switching pieces 62 and 63, the conveying speed of the sheet is only slightly reduced, and the frequency of folds, wrinkles, or jams that tend to occur at the leading edge of the sheet is reduced to almost zero. Furthermore, the locking position is reliably held from time _t1 to time _t2 by the aforementioned holding torque of the drive motor 60. Motor 60 when locked
Current no longer flows through the coils 74 and 75.

Even when all operations are completed and the motor 42, compressor 26, and pumps 23 and 26 are turned off, the switching pieces 62 and 63 remain in the positions defined in FIG. 8 and the operations are completed.

[Other embodiments of the invention]

According to the embodiment of the present invention described above, as ^shown in ^FIG .
Since the cylindrical fixed frame 58 is integrally formed with the outer ring of the switch, the locking portions of the switching pieces 62 and 63 rotate. According to this other embodiment, if the portion of the guide pulley where the switching piece is locked is fixed to the inner ring of the bearing, the portion where the switching piece is locked on the guide pulley will not rotate. As a result, the contact portion between the switching piece and the guide pulley does not slide, so it does not wear out and has an extremely long service life.

A detailed description will be given below with reference to the drawings. 10th
11 is a side view showing another embodiment of the paper sheet sorting device according to the present invention, and FIG. 11 is a longitudinal sectional view showing a portion taken along line CC in FIG. 10 in the direction of arrows.

That is, in FIG. 11, two pairs of main conveyor belts 250 are disposed in parallel, forming a pair at the upper and lower sides.
251 comes out of contact with the guide pulleys 252a and 252b to form a skirt-like expansion,
The upper belt 250 overlaps with a belt 254 that is wrapped around a guide pulley 253 and runs in the direction of the arrow, and thereafter the belt 25 is moved to a predetermined location (not shown).
0 and 254 are arranged so as to run in contact with each other. A separator 257 is disposed between the guide pulleys 252a, 252b and the guide pulleys 253 and 255, with its rotating shaft 258 perpendicular to the mounting base 259 as shown in FIG. The separator 257 is composed of two switching pieces 257a and 257b, each of which is orthogonal to the rotating shaft 258 and whose cross-sectional shape is approximately the shape of an "A" in Alphabetical, and is integrally connected at the center of rotation. The guide pulley 252a and the guide pulley 252b have the same structure. That is, the first
As shown in FIG. 0 with a partially cutaway cross section, support shafts 260, 261 fixed to the mounting base 259
are led out parallel to the rotating shaft 258 of the separator 257, and bearings 2 are attached to the supporting shafts 260, 261.
Cylindrical fixing frame 2 that fixes the inner rings of 62 and 263
64 and 265 are integrally fixed, and this fixed frame 2
64 and 265 are formed so as not to contact the outer rings of the bearings 262 and 263. Therefore, the fixed frames 264, 265 do not rotate. On the outer periphery of this fixed frame, outer sheaths 266 and 267, such as anti-vibration rubber, which have extremely good shock absorbing power, are formed.
The guide pulleys 253 and 255 have the same structure as the guide pulleys 34p and 34q described in the previous embodiment. Other components that have the same configuration as those in the previous embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The operation of the paper sheet sorting device according to another embodiment having the above configuration will be explained with reference to FIG. 11 as well. That is, as shown in FIG. 11, a part of the guide pulley side end of the switching piece 257b is engaged with an outer cover 266 formed on the fixed frame 264, and is formed between the conveyor belt 251b and the switching piece 257b. At this time, the paper sheet 273 enters the space where the fixed frame 264 is fixed to the support shaft 260.
The outer cover 266 fixed to 64 also does not rotate. Therefore, the outer sheath 266 and the switching piece 257b are simply in contact with each other and will not wear out. In addition, when switching the conveyance direction, the outer sheath formed around the fixed frame uses anti-vibration rubber that has good shock absorption ability, so it can suppress the rebound when the switching piece contacts the pulley. .

[Modified example of the invention]

In the embodiment described above, the switching pieces 62, 63, 25 each have an alpha-abbet "A" shape in cross section.
7a and 257b are not limited to two, but may be one or three or more. Further, the switching piece may be placed outside the conveyor belt running in parallel. Further, the switching piece that is engaged with the guide pulley is not limited to the embodiment, and various modifications can be considered. That is, the gist of the present invention is that the switching piece acts as an arm, and a part of the pulley including the support shaft acts as a stopper.

Further, the conveyor belt is not limited to two belts running in parallel, and may be one or three or more conveyor belts.

Furthermore, although the embodiments of the present invention have been described using ball bearings as the guide pulley, the guide pulley is not limited to this example, and it goes without saying that a pulley using a sliding bearing can also be used.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an example of the principle configuration of a paper sheet processing device according to the present invention, FIG. 2 is a side view showing an embodiment of a paper sheet sorting device according to the present invention, and FIG. , a partially cutaway plan view taken along line A-A in FIG. 2 in the arrow direction, FIG.
4 is a characteristic diagram showing the torque curve of the main motor shown in FIG. 4, FIG. 6 is a schematic diagram showing the operating principle of the main motor shown in FIG. 4, and FIG. 7 is a paper sheet of the present invention. Waveform diagram for explaining the operation of the classification device, No. 8
The figure is a vertical cross-sectional view when FIG. 3 is cut along the line B-B and viewed in the direction of the arrow, FIG. 9 is a vertical cross-sectional view for explaining one operation of FIG. 8, and FIG. Plan view showing another embodiment of the paper sheet sorting device according to the invention, No. 11
The figure is a longitudinal cross-sectional view when FIG. 10 is cut along the line CC and viewed in the direction of the arrows. In addition, 31a, 31b...main conveyor belt, 34
a, 34b...34s...Guide pulley, 44...
Separator, 60... Drive motor, 61... Rotating shaft, 61, 63... Switching piece, 76... Drive power source.

Claims (1)

[Scope of Claims] 1. First and second main conveyor belts that are guided by first guide pulleys and then come out of contact with each other and run in a skirt-like expansion, and the main conveyance belt that spreads out in a skirt-like manner. First and second main conveyor belts, which are provided inside the belt and extend into a skirt shape, each forming a first and a second conveyance path.
A second guide pulley around which an auxiliary conveyor belt is wound, and the axes of the first and second guide pulleys are located in a space formed between the second guide pulley and the conveyor belt that spreads out like a skirt. A rotating shaft that can be rotated in forward and backward directions and which is guided out substantially parallel to the rotating shaft, and a switching piece fixed to the rotating shaft, the switching piece and the first guide pulley being connected to each other when the rotating shaft rotates. A relationship in which the tip end on the first guide pulley side is locked by the first guide pulley, and the first guide pulley regulates forward and reverse angular displacement of the switching piece due to rotation of the rotating shaft. is positioned within the space, and the switching piece and the first main conveyor belt or the second main conveyor belt form first and second paths, and the first A paper sheet sorting device characterized in that it is configured to switch between a conveyance path and a second conveyance path. 2. The paper sheet sorting device according to claim 1, wherein the first guide pulley has a rotating part supported by a ball bearing. 3. The paper sheet sorting device according to claim 2, wherein the switching piece is locked to a frame fixed to a bearing outer ring of the first guide pulley. 4. The paper sheet sorting device according to claim 3, wherein the switching piece is made of a material having a low specific gravity and a low coefficient of friction. 5. The paper sheet sorting device according to claim 2 or 4, wherein the switching piece is a processed resin product. 6. The paper sheet sorting device according to claim 2, wherein the switching piece is locked to a fixed frame that fixes a bearing inner ring of the first guide pulley. 7. The paper sheet sorting device according to claim 6, wherein the portion of the fixed frame to which the switching piece is locked is made of a material with good shock absorption ability. 8. The rotating shaft has a static position at a predetermined rotational angle, and a characteristic curve such that the torque for rotational driving at a position at a rotational angle of approximately 1/2 of this rotational angle is the maximum torque. The paper sheet sorting device according to claim 1, characterized in that it is driven using a motor. 9. The motor has magnetic poles at opposite positions of the stator, and by using a motor in which the rotor is composed of a permanent magnet, the magnetic pole is attracted by the attractive force of the permanent magnet, and the switching piece is attached to the guide pulley. 9. The paper sheet sorting device according to claim 8, wherein the paper sheet sorting device maintains a locked state. 10. Claim 1, characterized in that a position above the 1/2 rotation angle of the rotating shaft of the motor is located on a line connecting a contact portion of a conveyor belt that spreads like a skirt and the center of the rotating shaft. The paper sheet sorting device according to item 8 or 9. 11. The paper sheet sorting device according to claim 1, wherein a plurality of said switching pieces are fixed to a rotating shaft between said conveyor belts running in parallel. 12. The paper sheet sorting device according to claim 1 or 11, wherein the switching piece has a shape having an outline of an alpha alphabet "A". 13. The paper sheet sorting device according to claim 11 or 12, wherein the plurality of switching pieces are integrally formed at a connecting portion.