JPS6333879Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a take-up roll drive device for a take-up machine.

When winding a web such as paper or film onto a winding roll in a winding machine, the winding roll is connected to the output shaft of a slip clutch, and the winding roll is rotated by the output shaft of the slip clutch. Generally taken. This winder guides the web through a feed roller to a take-up roll, and when the input shaft of the slip clutch is rotated at a higher rotational speed than its output shaft, the slip clutch applies torque to the take-up roll. tension can be created in the web between the feed roller and the take-up roll. Therefore, the web can be tightly wound. However, when the web is wound onto a take-up roll, the winding diameter of the take-up roll increases, so the number of revolutions of the take-up roll decreases, and the number of revolutions of the output shaft of the slip clutch also decreases. For this reason, in the past, there was a problem that the difference in rotational speed between the input shaft and the output shaft of the slip clutch was increased. Therefore, even if the difference in rotational speed between the input shaft and the output shaft increases, it is necessary to use a slip clutch with a large capacity to tolerate it, which has the disadvantage of increasing costs. .

Therefore, this invention aims to solve the above-mentioned conventional problem by maintaining a uniform difference in rotational speed between the input shaft and output shaft of the slip clutch even if the winding diameter of the take-up roll increases. It has been done. In particular, this invention connects the input shaft of the slip clutch to the output shaft of a continuously variable transmission, connects the input shaft of this transmission to a driving motor, connects the feed roller to the driving motor, and also connects the input shaft of the transmission to the driving motor. Connect the ratio adjustment shaft to the pilot motor. Further, a winding diameter detecting means for detecting the winding diameter of the take-up roll and a rotation speed detecting means for detecting the rotation speed of the feed roller are connected to the arithmetic circuit. Even if the winding diameter of the winding roll increases, the calculation circuit adjusts the winding diameter and feed of the winding roll so that the difference in rotational speed between the input shaft and the output shaft of the slip clutch is maintained evenly. Rotation speed detection that calculates the appropriate rotation speed of the input shaft of the slip clutch from the rotation speed of the roller, rotates the gear ratio adjustment shaft of the transmission using the pilot motor, and then detects the rotation speed of the input shaft of the slip clutch. The present invention is characterized in that it is provided with a feedback control mechanism for controlling the pilot motor in a feedback manner in response to a rotational speed detection signal from the detection means.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

In the figure, a take-up roll 1 is connected to an output shaft 2o of a slip clutch 2. The slip clutch 2 may be, for example, a so-called powder clutch adapted to be slipped by powder, or a mechanical slip clutch with a disk in slippable contact. It is guided to the take-up roll 1 via the winding roll 1.

An input shaft 2i of the slip clutch 2 is connected to an output shaft 6o of a continuously variable transmission 6 via a reduction gear 5, and an input shaft 6i of the transmission 6 is connected to a drive motor 7. The feed roller 4 is connected to a drive motor 7 via a reduction gear 8. Further, a servo motor 9 is used as a pilot motor, and a gear ratio adjusting shaft 6c of the transmission 6 is connected to the servo motor 9.

In this embodiment, a potentiometer 10 is used as a winding diameter detection means for detecting the winding diameter of the take-up roll 1. Furthermore, a DC tacho generator 11 is used as a rotation speed detection means for detecting the rotation speed of the feed roller 4, and similarly, a DC tacho generator 11 is used as a rotation speed detection means for detecting the rotation speed of the feed roller 4.
A DC tachometer generator 12 is used as rotation speed detection means for detecting the rotation speed of the input shaft 2i. The potentiometer 10 and the tacho generator 11 are connected to an arithmetic circuit 13. The arithmetic circuit 13 and the tacho generator 12 are connected to a comparator 14, and the comparator 14 is connected to the servo motor 9 via an amplifier 15. The comparator 14 and the amplifier 15 act as a feedback control mechanism that feedback-controls the servo motor 9 in response to the rotational speed detection signal of the tacho generator 12.

In the winding roll drive device for the winding machine configured as described above, the rotational speed N ₁ of the driving motor 7 is reduced by the speed reducer 8 and transmitted to the speed roller 4 . The feed roller 4 rotates at a reduced rotational speed n ₁ and feeds the web 3 toward the take-up roll 1 .
At the same time, the rotational speed _N1 of the drive motor 7 is transmitted to the input shaft 6i of the transmission 6, the speed is changed by the transmission 6, and the rotation speed N1 is transmitted to the output shaft 6o. Furthermore, after being decelerated by the speed reducer 5, it is transmitted to the input shaft 2i of the slip clutch 2. The slip clutch 2 has an output shaft 2o and a take-up roll 1.
is rotated at a rotation speed n ₂ corresponding to the rotation speed n ₁ of the feed roller 4. As a result, the web 3 is wound onto the take-up roll 1. In order to create tension in the web 3 being wound up, the input shaft 2i of the slip clutch 2 may be rotated at a higher rotational speed _n'2 than its output shaft 2o. The slip clutch 2 causes the input shaft 2i and the output shaft 2o to slip and absorbs the difference between their rotational speeds n' ₂ and n ₂ .
It acts to transmit torque from the input shaft 2i to the output shaft 2o. Therefore, torque can be applied to the take-up roll 1, and the feed roller 4 and the take-up roll 1
Tension can be created in the web 3 between them.
The web 3 is tightly wound onto the take-up roll 1 due to its tension.

However, when the web 3 is wound onto the take-up roll 1, the winding diameter D of the take-up roll 1 increases, so the number of rotations of the take-up roll 1, that is, the number of revolutions _n2 of the output shaft 2o of the slip clutch 2 increases. Decrease. For this reason, conventionally the input shaft 2i of the slip clutch 2
As mentioned above, there is a problem in that the difference between the rotational speeds n' ₂ and n ₂ of the output shaft 2o is increased.

In this take-up roll drive device, the winding diameter D of the take-up roll 1 is detected by a potentiometer 10,
The winding diameter detection signal is sent from the potentiometer 10 to the arithmetic circuit 13. Furthermore, the rotation speed n ₁ of the feed roller 4 is detected by the tacho generator 11 , and the rotation speed detection signal is sent from the tacho generator 11 to the arithmetic circuit 13 . Then, the calculation circuit 13 adjusts the winding diameter D and feed of the take-up roll 1 so that the difference between the rotational speeds n' ₂ and n ₂ of the input shaft 2i and the output shaft 2o of the slip clutch 2 is maintained substantially uniform. The appropriate rotational speed _n'2 of the input shaft 2i of the slip clutch 2 is calculated from the rotational speed _n1 of the roller 4.

Since the web 3 is sent by the feed roller 4, its speed U is determined by the diameter d and the rotation speed of the feed roller 4.
determined by n ₁ . The take-up roll 1 rotates at a rotation speed n ₂ according to the winding diameter D, and the web 3 is rotated at a speed U.
Wind up. The relationship is expressed by the following equation.

U=πdn ₁ =πDn ₂ Therefore, the number of rotations of the take-up roll 1, that is, the number of rotations n ₂ of the output shaft 2o of the slip clutch 2, is n ₂ = d/Dn ₁ The appropriate number of rotations of the input shaft 2i of the slip clutch 2. Number of revolutions
n' ₂ is: n' ₂ = n ₂ + α = d/Dn ₁ + α In short, the difference between the rotational speeds n' 2 and n ₂ of the input shaft 2i and output shaft 2o of the slip clutch ₂ is maintained at the set value α. Thus, the appropriate rotational speed _n'2 of the input shaft 2i of the slip clutch 2 can be calculated from the winding diameter D of the take-up roll 1 and the rotational speed _n1 of the feed roller 4. The set value α can be arbitrarily set within the allowable heat capacity of the slip clutch 2.

The calculated value of the calculation circuit 13 is sent to the comparator 14, amplifier 15, and servo motor 9 as its output signal. With this, the servo motor 9
is driven, the gear ratio adjustment shaft 6c of the continuously variable transmission 6 rotates, and the gear ratio of the transmission 6 is adjusted. As a result, the rotational speed of the input shaft 2i of the slip clutch 2 is
n' ₂ is adjusted so that the difference between the rotational speeds n' ₂ and n ₂ of the input shaft 2i and the output shaft 2o is kept uniform, that is, at the set value α.

Further, as is well known, the continuously variable transmission 6 normally has unique speed change characteristics. It is inevitable that this speed change characteristic affects the rotational speed _n'2 of the input shaft 2i of the slip clutch 2. Therefore, the drive amount of the servo motor 9 and the rotation speed n' ₂ of the input shaft 2i do not correspond perfectly. In this take-up roll drive device, the rotation speed n' ₂ of the input shaft 2i of the slip clutch 2 is detected by a tachometer generator 12, and the rotation speed detection signal is sent from the tachometer generator 12 to a comparator 14.
sent to. The comparator 14 is the arithmetic circuit 13
The output signal of the tachometer generator 12 is compared with the detection signal of the tacho generator 12, and the difference is sent to the amplifier 15 and the servo motor 9 as an output signal. As a result, the servo motor 9 is subjected to feedback control. Therefore, the speed change characteristics of the continuously variable transmission 6 are compensated, and the rotational speed n' ₂ of the input shaft 2i is accurately adjusted to the appropriate rotational speed n' ₂ calculated by the calculation circuit 13. Therefore, the rotational speeds n′ ₂ , n ₂ of the input shaft 2i and the output shaft 2o
The difference is kept completely uniform.

As explained above, according to this invention, the winding roll 1 is connected to the output shaft 2o of the slip clutch 2, the input shaft 2i of the slip clutch 2 is connected to the output shaft 6o of the continuously variable transmission 6, and the An input shaft 6i of the machine 6 is connected to a driving motor 7. moreover,
A feed roller 4 is connected to a drive motor 7. Therefore, the feed roller 4 is driven by the drive motor 7.
is driven, the feed roller 4 rotates at a constant rotation speed _n1 , and the web 3 is fed by the feed roller 4. At the same time, the same drive motor 7 drives the transmission 6, the slip clutch 2, and the take-up roll 1. Take-up roll 1 is feed roller 4
rotates at a rotation speed n ₁ and a corresponding rotation speed n ₂ . Regarding the input shaft 2i and the output shaft 2o of the slip clutch 2, the input shaft 2i rotates at a rotational speed n' ₂ larger than the output shaft 2o, and the input shaft 2i and the output shaft 2o of the slip clutch 2 slip. Therefore, torque is applied to the take-up roll 1, and the web 3
The web 3 can be wound onto the take-up roll 1 and wound tightly.

Further, according to this invention, the gear ratio adjusting shaft 6c of the transmission 6 is connected to the pilot motor 9.
A winding diameter detection means 10 for detecting the winding diameter D of the take-up roll 1 and a rotation speed detection means 11 for detecting the rotation speed _n1 of the feed roller 4 are connected to an arithmetic circuit 13. The appropriate rotational speed _n'2 of the input shaft _2i of the slip clutch 2 is calculated from the winding diameter D of the take-up roll 1 and the rotational speed n1 of the feed roller 4, and the pilot motor 9 controls the transmission 6. The gear ratio adjustment shaft 6c is operated and rotated. As a result, even if the winding diameter D of the take-up roll 1 increases, the input shaft 2i of the slip clutch 2 is substantially
The difference between the rotational speeds n' ₂ and n ₂ of the output shaft 2o and the output shaft 2o can be kept uniform. Therefore, there is no need to use a slip clutch 2 with a large capacity, and the cost can be reduced. Furthermore, according to this invention, the rotation speed n' ₂ of the input shaft 2i of the slip clutch 2 is detected by the rotation speed detection means 12,
The pilot motor 9 is feedback-controlled in response to the rotational speed detection signal. Thereby, the speed change characteristics of the continuously variable transmission 6 can be compensated, and the rotational speed _n'2 of the input shaft 2i of the slip clutch 2 can be adjusted accurately.

Furthermore, according to this invention, the feed roller 4 and the take-up roll 1 are driven by the same driving motor 7. Therefore, the feed roller 4 and the take-up roll 1 can be driven simultaneously and perfectly synchronized. Moreover, the single driving motor 7 can be used for both the feed roller 4 and the take-up roll 1, and there is no need to provide a motor dedicated to the feed roller 4 or the take-up roll 1. Therefore, the cost can be reduced.

[Brief explanation of drawings]

The drawing is a block diagram showing an embodiment of this invention. 1... Winding roll, 2... Slip clutch,
3... Web, 4... Feed roller, 6... Continuously variable transmission, 7... Drive motor, 9... Servo motor,
10... Potentiometer, 11, 12... Tacho generator, 13... Arithmetic circuit, 14... Comparator, 15... Amplifier.

Claims (1)

[Scope of utility model registration request] A take-up roll is connected to an output shaft of a slip clutch, the take-up roll is rotated by the output shaft of the slip clutch, and a web such as paper or film is guided to the take-up roll via a feed roller, rotating the input shaft of the slip clutch at a higher rotational speed than the output shaft thereof, applying torque to the take-up roll by the slip clutch to create tension in the web between the feed roller and the take-up roll; In a winding machine configured to tightly wind a web onto a winding roll, an input shaft of the slip clutch is connected to an output shaft of a continuously variable transmission;
The input shaft of the transmission is connected to a driving motor, the feed roller is connected to the driving motor, the gear ratio adjustment shaft of the transmission is connected to a pilot motor, and the winding diameter of the take-up roll is adjusted. A winding diameter detecting means for detecting the rotational speed of the feed roller and a rotational speed detecting means for detecting the rotational speed of the feed roller are connected to an arithmetic circuit, and the arithmetic circuit is connected to the pilot motor. In order to maintain a uniform difference in rotational speed, the calculation circuit calculates the appropriate rotational speed of the input shaft of the slip clutch from the winding diameter of the take-up roll and the rotational speed of the feed roller. rotating the gear ratio adjustment shaft of the transmission by;
Further, the present invention is characterized in that it is provided with a rotation speed detection means for detecting the rotation speed of the input shaft of the slip clutch, and a feedback control mechanism for feedback controlling the pilot motor in response to a rotation speed detection signal from the detection means. Take-up roll drive device.