JPS6047365B2 - Tandem card driving method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for driving a tandem card.

In a tandem card, it is important to start and stop the first and second cylinders of the first and second cards in synchronization, and at the time of startup, it is important to start and stop the first and second cylinders at the same time. If a large deviation occurs and the first cylinder reaches the normal rotation speed earlier than the second cylinder, the thickness of the web in the second cylinder will increase and it will no longer be possible to perform a sufficient ordering action, resulting in a decrease in the quality of the spun sliver. Also, if there is a large difference in the time it takes for the first and second cylinders to stop and the first cylinder is stopped earlier than the second cylinder, web breakage may occur between the first and second cylinders. This causes sliver splicing work to be performed at the next start-up, resulting in a decrease in operating efficiency, waste of raw materials, and sliver unevenness.

Therefore, in order to solve the above problem, conventionally, the first cylinder of the first card and the first take-in roller were connected by the first motor.
The second cylinder and the second taker-in roller of the second card are operated by the second motor, and the other driving parts such as the first and second dolphers of the first and second cards, such as the cotton feeding part, the transfer roller part, and the stripping part. , the coiler parts (hereinafter also referred to as first, second, etc.) are driven by variable speed motors, and the starting and stopping of the visible speed motors is started and stopped by using a timer. A tandem card driving method has been proposed in which the tandem card is synchronized with the stoppage. However, in such a drive method, a timer is used to synchronize the start and stop of the speedable motor with the start and stop of the first and second motors, and when starting, the first and second cylinders The time it takes for the engine to reach its normal rotational speed and for it to come to a complete stop when stopped varies greatly depending on changes in the load applied to the first and second cylinders due to factors such as the tension of the belt and the presence or absence of a web. It is extremely difficult to set the correct time for the timer, and it is troublesome to have to change the set time repeatedly. Moreover, if the time setting of this timer is not accurate, the rotation and stop of the first and second There was a problem that the rotation and stop of the cylinders could not be synchronized, resulting in web clogging or web breakage between the first and second cylinders and the first and second dolphers. In addition, as mentioned above, the variable speed motor is automatically started after a predetermined set time has elapsed after starting the first and second motors, so there is no possibility of bend slipping or belt coming off due to bend clogging. For some reason, the first
, even when the second motor drive system is not rotating normally.
There was also a problem in that the first and second needles were rotated and the web became jammed. Therefore, an object of the present invention is to solve the above-mentioned problems, and the first and second needles, the cotton feeding section, etc. are operated by a needle motor that is separate from the first and second motors for driving the first and second cylinders. Even if it is a method of driving,
The rotation at the time of starting and stopping the first and second
By controlling the rotation of the motor drive system to follow the rotation, the rotation start and complete stop of the first and second slivers can be approximately synchronized with the rotation start and complete stop of the first and second motor drive systems, which improves the quality of the spun sliver. The purpose of this invention is to provide a method for driving a tandem card that can improve performance and work efficiency.

Next, embodiments of the present application will be described in detail with reference to the drawings.

In Figure 1, 1 is the first card, 2 is the second card, 3
numeral 4 indicates a cotton feeding section, numeral 4 a transfer roller section, numeral 5 a stripping section, and numeral 6 a coiler section.

In this first card, 7 is a first cylinder, 8 is a first take-in roller, 9 is a first flat, and 10 is a first dolpher. Also, in the second card 2, 11 is the second
cylinder, 12 is the second take-in roller, 13 is the second
The flat and 14 are the second dots. In the cotton feeding section 3, 15 is a feed roller, and in the transfer roller section 4, 16 is a stripping roller, and 17 is a transfer roller, which are disposed between the first doffer 10 and the second taker-in roller 12. In the stripping section 5, 18 is a doffing roller, 19 is a take-off roller, 20 is a bottom crush roller, 21 is a top crush roller, and the downstream side of the second dot 14 (first
(left side in the figure). The above coiler part 6
, 22 is a calendar roller, 23 is a coiler wheel, and 24 is a stable. Next, the drive mechanism of the tandem card as described above is constructed as shown in FIG. 2, and will be explained next.

The first cylinder 7 of the first and second cards 1 is connected to the first motor I.
The first take-in roller 8 and the first flat 9 are rotated in the direction of the arrow by the first cylinder 7 via the belts 27, 28, etc., respectively. It is becoming driven. Second
The second cylinder 11 of the card 2 is rotationally driven in the direction of misprint by the second motor IM2 via the belt 30, etc.
The taker-in roller 12 and the second flat 13 are rotated by the second cylinder 11 in the direction of misprinting via belts 31, 32, etc. The first motor IMl and the second motor IM2 are AC general-purpose motors, and constitute a cylinder motor. In addition, the above first
, the parts rotationally driven by the second motors IMl and IM2 will be referred to as first and second motor drive systems, respectively. Also, the first card 1
The first transfer roller 10 of the transfer roller section 4 is driven to rotate in the direction of the arrow by the third motor IM3 via the gear 34, etc., and the stripping roller 6 of the transfer roller section 4
The transfer roller 17 is rotationally driven in the direction of the arrow by a gear 34a meshing with the gear 34a, and the transfer roller 17 is rotationally driven in the direction of the arrow by a gear 34b meshing with the gear 34a. Further, the second document 14 of the second card 2 is the fourth
The rollers 18 to 21 of the stripping section 5 are driven to rotate in the direction of the arrow by the motor IM4 through a gear train 37, etc. It's getting old. The above third motor IM
The third motor IM4 and the fourth motor IM4 are AC general-purpose motors, and constitute a document motor. In addition, the above third and fourth
The parts rotationally driven by motors 1M3 and IM4 are
, a fourth motor drive system. The feed roller 15 of the cotton feeding section 3 is rotationally driven in the direction of the arrow by the second needle 14 via the clutch 38, side shaft 39, etc.
The calendar roller 22, coiler wheel 23, and can table 24 of the coiler section 6 are rotatably driven in the direction of the arrow by the gear 36 via a clutch 40 and the like. Reference numerals 41 and 42 designate rotation detectors capable of detecting the rotational speeds of the first and second taker rollers 8 and 12 and outputting detected values corresponding to the rotational speeds at that time; 2 taker in rollers 8, 12 shaft 8a
, 12a, and a pulse generator PGl configured to output a pulse signal every time the teeth of the detection gears 41a, 42a pass through the detection section.
, PG2.

Next, the first motor IMl, the second motor IM2, and the third motor
The drive circuit of motor IM3 and fourth motor IM4 is shown in Fig. 3.
It is constructed as shown in FIG. 4, and will be explained next.

The first motor IMl and the second motor IM2 have normally open contacts MSl-Al and MS2-a1 of the electromagnetic switches MSl and MS2, respectively.
is connected to the power supply R-S-T via the third motor IM3.
, the fourth motor IM4 are both normally open contacts M of the electromagnetic contactor MC.
Power supply R・S via C-a1 and inverter device 1NV
Connected to OT. This inverter device INV can be a commercially available AC variable speed control device (generally called 1 inverter) that can change the rotational speed of an AC motor by changing the frequency. , a detailed explanation of this will be omitted. Magnetic contactor M of input terminals 43 and 44 of this inverter device INV
are connected to each other through normally open contacts MC-A2 of C, and . The input terminals 45 and 46 are connected so that a set voltage of the rotation speed setting circuit DSC is applied, and the inverter device 1NV controls the third and fourth motors IM3 according to this set voltage.
, the rotational speed of IM4 is controlled. This rotation speed setting circuit. In the DSC, 47 is a terminal to which a constant DC voltage is applied, which is connected to a tuning terminal 48 via a resistor R, and this tuning terminal 48 is connected to a low-speed setting via a normally closed contact RYH-b1 of a relay RYH for high-speed operation. are connected to the high/speed setting volume ■RH via the normally open contact RYH-a1 of the relay RYH. In addition, the terminal 49 of the above-mentioned low speed setting volume ■RL is a normally closed contact RYH-
Terminal 50 of high-speed setting volume VRH via B2.
are connected to the input terminals 45 through normally open contacts RYH-A2, respectively.
are connected to each other. Next, the tuning terminal 48 is connected so that the output voltage of the tuning circuit SCC is applied thereto. In this tuning circuit SCC, F1 and FV2 are the frequencies of the pulses sent from the rotation detectors 41 and 42, and the output voltages of both the first and second taker-in rollers 8 and 12 when their rotational speeds are the rated rotational speeds. A frequency-to-voltage converter (
(hereinafter referred to as converters FVl and JFV2). Therefore,
The output voltages of the converters FVl and FV2 show values corresponding to the increase and deceleration of the rotational speeds of the first and second taker-in rollers 8 and 12. Input side terminal 5 of these converters FVl, F■2
1 and 52 are pulse generators P of the rotation detectors 41 and 42;
Gl and PG2, respectively, and output terminals 53 and 54 are connected to the tuning terminal 48 via diodes Dl and D2, respectively. The above diodes Dl and D2 are the tuning terminal 4
8 is connected so that it is controlled by the lower of the voltages at the output terminals 53 and 54. FIG. 4 shows a drive control circuit for the first to fourth motors IMl to IM4. In this drive control circuit, PBl is the first and second
Switches for starting motors IMl and IM2 and PB2 are switches for stopping synchronization, which are connected to the electromagnetic switches MSl and M
A starting switch P is connected in series to each of S2.
When Bl is closed, it is normally open, 01S1-A2, MS2-A2
is excited so that the electromagnetic switches MSl and MS2 are self-contacted. E is the above electromagnetic switch MSl, MS
2 is connected in parallel to the timer, and the set time is the time from when the first and second motors IMl and IM2 are started until the first and second motor drive systems reach normal spinning operating speeds. The time is set. PB3 is a synchronization starting switch, which is connected in parallel with the starting switch PBl, and also connects the timer T in line with the electromagnetic contactor MC.
It is connected via the normally closed contact TR-b1 of R. P.B.
L is a switch for low-speed operation of the third and fourth motors IM3 and IM4, which is connected in parallel to the synchronization start switch PB3, and when these low-speed operation switch PBL or synchronization start switch PB3 is closed, electromagnetic contact occurs. The contactor MC is energized, the normally open contact MC-A3 is closed, and the electromagnetic contactor MC is activated.
is becoming excited. PBH is a switch for high-speed operation of the third and fourth motors IM3 and IM4, and a timer TR is connected in series to the above-mentioned relay RYH for high-speed operation and the auxiliary relay RYA connected in parallel to this relay RYH. is connected via the normally open contact TR-a1 of
When H is closed, auxiliary relay RYA is energized and normally open contact RY
A-a1 is closed and the high-speed operation switch RYH is energized. PBS is a switch for stopping the third and fourth motors IM3 and IM4. Furthermore, the drive circuit is provided with the following safety device 55.
That is, the pulse generator PGl of the rotation detectors 41 and 42
, When the number of pulses per unit time of either one of the pulse signals output from PG, that is, the pulse frequency is larger than a predetermined set value, the normally open contact -a1 closes, and when it is smaller than this set value, the normally open contact MD-a1 opens. Detector M designed like this
D is attached. The immediate setting values for this detector are the first,
The pulse frequency is set to a value several percent lower than the pulse frequency during normal rotation of the second taker-in rollers 8, 12. When the value falls below a set value that is several percent lower, this detector MD detects and opens the normally open contact MD-a1. The normally open contact MD-a1 of the detector MD is connected in parallel to the normally closed contact TR-b1 of the timer TR, which is connected in series to the electromagnetic contactor MC, and is connected to the first and second motor drive systems. reaches the normal spinning speed and timer T
After the normally closed contact TR1b1 of R is opened, the electromagnetic contactor MC is energized via the normally open contact TR1a1 of this detector. In addition, a normally open contact RYS-b1 that opens when a spinning abnormality such as sliver breakage occurs is connected to the self-holding circuit of the electromagnetic contactor MC, and a self-holding circuit of the high-speed operation relay RYR is connected to reduce wrap. A normally closed contact RLC-b1 which is sometimes open is connected. Furthermore,
A normally closed contact RFC-b1, which opens when the can is full, is connected in series to the high-speed operation relay RYH and in parallel to the auxiliary relay RYA. Next, the operation of the above configuration will be explained with reference to FIG.

In FIG. 5, the solid line represents the rotational speed of the first cylinder 7 of the first motor drive system, the two-dot chain line represents the rotational speed of the second cylinder 11 of the second motor drive system, and the dots represent the rotational speed of the third and fourth motors. The rotational speeds of the first and second shuttles 10 and 14 of the drive system are shown, respectively. Now, when the synchronization starting switch PB3 is closed at the point in time (a), the electromagnetic switches MSl, MS2, timer TR, and electromagnetic contactor MC are energized and self-maintained, thereby causing the first and second motors IMl, IM2 is started at the same time and the first and second cylinders 7, 11 and the first,
The rotation of the second taker-in rollers 8 and 12 is increased. In this case, since the loads applied to the first motor drive system and the second motor drive system are substantially equal, the speeds of the first motor drive system and the second motor drive system are increased at substantially the same speed. The rotation detector 4 is detected by the rotation of these first and second taker rollers 12.
The detection gears 41a and 42a also rotate. Therefore, the pulse generators PGl, PG2 transmit pulse signals so that the voltages at the output side terminals 53, 54 of the transformers FVl, FV2 in the tuning circuit SCC change to the first and second taker in rollers 8, 1.
2, so that until then the voltage from the tuning terminal 48 through the diodes Dl, D2 to the converter FVl
, the current flowing into FV2 decreases and the tuning terminal 48
voltage increases. In this case, the voltage at the tuning terminal 48 is controlled by the rotation of the first and second taker rollers 8 and 12 at the time of startup, which has a slower speed increase, that is, by the voltage at the output side terminals 53 and 54, which has a lower voltage increase. and is increased according to this lower voltage. When the voltage at the tuning terminal 48 begins to rise as described above, the voltage at the terminal 49 of the low-speed setting volume RL of the first and second converters 10 and 14 also rises, and the direct current input to the inverter device 1NV. Voltage begins to rise.
When this DC voltage becomes larger than the followable voltage (a set voltage set close to the followable voltage may be used) for producing the minimum output frequency by the inverter 1NV, the inverter 1NV will be turned off at the time of (b). The third and fourth motors IM3 and IM4 begin to rotate. The rotational speed of the first and second converters 10, 14 at the minimum output frequency of the inverter device 1N2 is indicated by P1, and the rotational speed of the first cylinder 7 when producing this minimum output frequency is indicated by P2. Since the speed increases of the third and fourth motors IM3 and IN4 are performed collectively by the inverter device 1NV, these speed increases are performed at the same speed increase and in synchronization. Next, when the voltages at the output terminals 53 and 54 rise and the lower voltage at the output terminals 53 and 54 reaches the potential at the tuning terminal 48 at the point in time (c), the voltage at the first and second terminals increases.
Even if the taker-in rollers 8, 12 are rotated faster, the voltage at the tuning terminal 48 is kept constant,
0 and 14 are rotated at a constant speed at a predetermined low speed set by the low speed setting volume VRL. The low rotational speed of the first and second transfers 10, 14 at this point in time (c) is indicated by P3. Next, the first and second taker rollers 8, 12
When the rotational speed of the second cylinder 11, which is slow to increase in speed, is increased to a speed P5 slightly lower than the normal rotational speed, the detector MD of the safety device 55 is activated at the time of (d). When activated, the normally open contact MD-a1 is closed. After that, when the time T for increasing the speed of the first and second cylinders 7 and 11 to the normal rotation speed has elapsed, the timer TR is activated at the time point (e), and the normally closed contact sum -b1 is normally In the open circuit, the normally open contact TR-a1 is closed. In this case, even though the normally closed contact TR-b1 of the timer TR is open, the normally open contact MD-a1 is closed, so the magnetic contactor MC is maintained in the excited state, and the third and fourth motors IM3 and IM4 are stopped. It's never done. After that, the first and second cylinders 7, 1
1, the first and second taker in rollers 8, 12, etc., and at the time (f), the first and second taker in rollers 10
When the high-speed operation switch PBH of , 14 is closed, the high-speed operation relay RYH and the auxiliary relay RYA are excited and self-maintained, and the normally closed contact RYH- of the rotation speed setting circuit DSC is closed.
b1 is opened, and normally open contact RYH-a1 is closed.
Therefore, instead of the previous low speed setting volume VRL, the high speed setting volume. The terminal 50 voltage of the volume VRH is input to the inverter device 1N■, and the third and fourth motor IM3
, IM4 is switched to high speed rotation. As a result, the first
The second ports 10 and 14 are high-speed setting volume VRH.
The speed is increased to the speed P4 set in , and the rotation is performed at a constant speed at this high speed P4. In addition, the above-mentioned high-speed operation switch PBH
If the first and second motor drive systems are closed before reaching normal rotational speed, the normally open contact TR-a1 of the timer TR is open, so the first and second motor drive systems 10
, 14 are never switched to the high speed side. Next, during the above-mentioned normal spinning operation state, although the illustration in FIG. Alternatively, if the rotation speed is slightly lower than the normal rotation speed, that is, the speed at which the detector MD operates due to some reason such as a belt coming off, the normally open contact MD-a1 of the safety device 55 opens and the magnetic contactor MC is de-energized. Unraveled, third and fourth motor I
Driving of M3 and IM4 is stopped.

Therefore, the rotation of the first and second dolphers 10 and 14, the transfer roller stripping section 5, the cotton feeding section 3, and the coiler section 6 is immediately stopped, and as a result, the rotation of the 71st taker roller 8 and the feed roller It is possible to prevent web clogging between the rollers 15 and between the second taker-in roller 12 and the transfer roller 17. In addition, as mentioned above, the detector M
When D is activated, it is preferable to notify the worker of the abnormality using a warning buzzer, lamp, etc. Next, when in the normal spinning operation state, at the point in time (g), the stop switches PBS of the first and second printers 10 and 14 are opened,
Normally closed contact RYS-b is closed due to an abnormality such as fryer breakage.
1 opens, the self-holding of the electromagnetic contactor MC is released and the electromagnetic contactor MC becomes de-energized, thereby stopping the driving of the third and fourth motors IM3 and IM4, and the first and fourth motors IM3 and IM4 are stopped. The second converters 10, 14, etc. are immediately stopped.When the low-speed starting switch PBL is then closed at point (h), if the cause of the abnormality has been removed, the electromagnetic contactor MC is re-energized and self-maintaining. and the third and fourth modes IM3
, IM4 is activated at low speed and the first and second ports 10,1
The 4th class is rotated at low speed. After that, when the high-speed operation switch PBH is closed at point (1), the high-speed operation relay RY
H and auxiliary relay RYA are energized again, and the first and second transfers 10, 14, etc. are rotated at high speed. Next, in the above normal spinning operation state, when the normally closed contact RFC-b1 of the deceleration signal relay becomes open due to the full can at time (j),
The high-speed operation relay RYH is de-energized and the first and second transfers 10, 14, etc. are switched to low-speed rotation. Thereafter, when the counter is reset at point (k) after replacing the can, the high-speed operation relay RYH is energized and the first and second transfers 10 and 14 are switched to high-speed rotation. Although not shown, in normal spinning operation, the normally closed contact RLC of the deceleration signal relay due to the decrease in laps.
-b1 is opened, the high-speed operation relay RYH and the auxiliary relay RYA are de-energized, and the first and second transfer relays 10
, 14, etc. are switched to low-speed rotation, and after replacing the wrap, when the high-speed operation switch PBH is closed, the high-speed operation relay RYH and auxiliary relay RYA are energized again, and the first and second converters 10, 14, etc. Can be switched to high speed rotation. Next, when the tuning stop switch PB2 is opened at point (1), the excitation of the electromagnetic switches MSl, MS2 and the timer TR is released, and the driving of the first and second motors IMl, IM2 is stopped. First and second cylinders 7, 11
The rotational speed of the first and second taker in rollers 8 and 12 gradually decreases due to elliptical rotation, and the normally open contact TR-a1 of the timer TR opens. , 14, etc. are switched to low speed rotation. And the first
, when the rotational speed of the second taker-in rollers 8 and 12, which is faster in deceleration, begins to decrease than the rotational speed at the time (c) above, the voltage at the tuning terminal 48 also changes to the second taker-in roller, which is faster in deceleration. The voltage input to the terminal 45 of the inverter device 1NV starts to decrease in accordance with the degree of deceleration of the roller 12, and as a result, the rotational speed of the third and fourth motors IM3 and IM4 is decreased, and the rotational speed of the first and second motors is reduced. The rotational speed of 10, 14, etc. is also reduced. These third and fourth motors IM3,
The rotational speed of the IM 4 is decreased while following the rotation of the first and second taker-in rollers 8 and 12 that is decelerated faster, that is, the rotation that is decelerated earlier. When the rotational speed of the second cylinder 11 becomes lower than the rotational speed P2 at the time (m), the voltage at the terminal 45 of the inverter INV becomes lower than the lowest frequency unfollowable voltage indicated as the set voltage, and the inverter The 1NV output becomes no voltage and the third
, the driving of the fourth motors 1M3 and IM4 is stopped, and the driving of the first, fourth motors 1M3 and IM4 is stopped.
The rotation of the second shuttles 10, 14, etc. is completely stopped. The second cylinder 11, second taker-in roller 12, etc. are completely stopped at point (n) after a slight delay, and then (
At time 0), the rotation of the first cylinder 10 and the first taker-in roller 8 is completely stopped. As above, the first and second
The rotation of the dotshua 10, 14, etc. is the first and second cylinder 7.
, 11, etc., the web is completely stopped immediately before the complete stop, so that web breakage at the time of stopping is reliably prevented. Further, the first and second cylinders 10, 11, etc. are connected to the inverter device 1.
The NV always synchronizes and completely stops almost simultaneously, thereby preventing web disturbance. In addition, in the above example,
The dower motor is composed of two motors, a third motor and a fourth motor, but it is possible to construct this with one motor and transmit the rotational force from the first dower side to the second dower side. Alternatively, it may be configured with three or more motors so that the cotton feeding section and the coiler section are driven by separate motors.

In addition, other driving parts such as the first and second dosing machines are driven directly by the dosing motor, but the dosing motor is configured to be driven via a changing machine.
The drive of the transmission, that is, the gear ratio, may be controlled to follow the rotation of the first and second motor drive systems that is slower to increase speed when starting, and to the rotation that is faster to decelerate when stopped.
Further, the rotation detector may be arranged to detect the rotational speed of a rotating body other than the first and second taker-in rollers, for example, the first and second cylinders, or a contact type may be used.
Furthermore, the speed of the dower motor is changed by changing the frequency using an inverter device.
The speed may be changed by other methods such as primary voltage control. As described above, in the present invention, the first cylinder, the first take-in roller, and the first flat of the first card are operated by the first motor, and the second cylinder, the second take-in roller, and the second flat of the second card are operated by the first motor. flat with the second motor, the first
, other driving parts such as the first and second printers of the second card are driven by the printer motors either directly or via a transmission, so that the load applied to the first and second motor drive systems is reduced. This makes it possible to easily synchronize the rise time and rotation stop timing of the first and second cylinders, and also to make the rotational speeds of the first and second cylinders substantially equal to each other. Even when the rotational speed fluctuates, it can always be maintained at a predetermined speed, thereby reducing web disturbance and weight fluctuations of the sliver during operation, and improving the quality of the spun sliver.

Furthermore, even in the case of a driving method in which the first and second transfers are driven by a transfer motor separate from the first and second motors as described above, the drive of the transfer motor or transmission is started. At times, the rotation speed of the first and second motor drive systems is controlled to follow the rotation speed of the slower speed increase, and when stopped, the rotation speed of the first and second motor drive systems is controlled to follow the rotation speed of the speed increase speed of the slow speed increase. When the rotational speed of the faster one of the first and second motor drive systems becomes lower than the set speed, the drive motor or transmission is stopped when the speed exceeds the set speed. Therefore, it is necessary to ensure that the rotation of the first and second pullers is started immediately after the rotation of the first and second cylinders is started, and that the first and second pullers are completely stopped immediately before the first and second cylinders are completely stopped. This makes it possible to prevent web clogging and web breakage that occur during startup and shutdown, and improve the quality of the spun sliver and work efficiency. In addition, as mentioned above, since the startup of the transfer motor or transmission is performed after checking the rotation of the first and second motor drive systems, there is no possibility that some abnormality may occur in the first and second motor drive systems. Even when the rotation of the first and second motor drive systems is stopped, it is possible to prevent wave damage to clothing, etc. and generation of sparks due to web clogging. Furthermore, even if the driving method is such that the starting and stopping of the first and second drivers are synchronized with the starting and stopping of the first and second cylinders as described above, the synchronization is performed by the driver's motor or speed changer. When the machine is driven, the rotation of the first and second motor drive systems is controlled to follow the slow speed increase, and when the machine is stopped, the speed of the first and second motor drive systems is controlled to follow the speed of the slow speed deceleration. The driving mechanism between the dower and the first and second cylinders can be greatly simplified, which has the effect of being able to be implemented at low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a schematic side view of the tandem card, FIG. 2 is a plan view showing the drive device, FIGS. 3 and 4 are electrical circuit diagrams of the drive device, and FIG. The figure is an explanatory diagram of the operation. 1...First card, 2...Second card, 7...First cylinder, 8...First take-in roller, 9...... 1st flat, 10...
...First dosing force, 11...Second cylinder, 12...Second take-in roller, 13...
...2nd flat, 14...2nd flat,
IMl... 1st motor, IM2... 2nd motor, IM3... 3rd motor (motor for dolphins), IM4... 4th motor (motor for dolphins). motor).

Claims (1)

[Claims] 1. The first cylinder, the first take-in roller, and the first flat of the first card are operated by the first motor, and the second cylinder of the second card is operated by the first motor.
The cylinder, the second taker-in roller, and the second flat are directly driven by a second motor, and the other drive parts such as the first and second dosers of the first and second cards are directly driven by one or more dossier motors, respectively. The motor or transmission is driven by the first or second motor drive system, whichever speeds up more slowly, when started, and when stopped, the first or second motor drive system is driven via a transmission. A method for driving a tandem card, characterized in that control is performed to follow the rotation of the faster decelerating one. 2. The document motor is composed of a third motor and a fourth motor, the third motor drives the first document and transfer roller of the first card, and the fourth motor drives the second document and strips the second card. 2. The method of driving a tandem card according to claim 1, wherein the third and fourth motors are speed-controlled at the same time.