JPH0770830A - Method and device for driving rotation flat of card - Google Patents

Abstract

PURPOSE:To prevent the deterioration of a card sliver on the acceleration or deceleration of a cylinder in a card in which the cylinder and its rotation flat are rotated with different motors. CONSTITUTION:A cylinder 1 is rotated with a main motor MM, and the rotation speed is transmitted to a control device 20 through a rotation detector 14. The control device 20 determines the synchronous travel speed of a rotation flat 9 from the rotation speed of the cylinder 1 and the ratio of the travel speed of the rotation flat to a cylinder rotation speed set in a setting device 21, and a signal for the synchronous travel speed is outputted to a variable speed motor M so as to give the synchronous travel speed. The travel speed of the rotation flat 9 is consequently synchronized with the cylinder rotation flat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for driving a rotary flat of a card (carding machine).

[0002]

2. Description of the Related Art A conventionally known rotary flat of a card is driven from a cylinder rotary shaft through a belt and a gear transmission system. When it is desired to change the traveling speed of the rotary flat depending on the type of fiber, the amount of foreign matters, etc., the gear in the transmission system is changed. In order to eliminate the trouble of changing gears, we have a flat motor for rotating flat drive in addition to the main motor that rotates the cylinder.
It is known that a flat motor travels from this flat motor through a stepped pulley.

[0003]

In the conventional motor having the main motor and the flat motor separately, since the main motor and the flat motor are not synchronously controlled,
Cylinders and rotary flats that differ greatly in inertia do not accelerate or decelerate synchronously when starting or stopping, and the cylinders and rotary flats are mechanically linked to each other, which is closer to starting and stopping than known ones. There is a problem that the quality of the card sliver that is spun out sometimes deteriorates.
An object of the present invention is to provide a main motor and a flat motor separately, and a driving method for performing a flat gear shift so as to reduce quality deterioration of a card sliver spun at the time of cylinder acceleration or deceleration. To get the equipment.

[0004]

[Means for Solving the Problems] In order to solve the above problems,
According to a first aspect of the present invention, in a card including a cylinder and a rotary flat that travels above the cylinder, each of which is independently driven by a main motor and a flat motor, the card is synchronized with acceleration or deceleration of the cylinder. It is characterized by changing the flat traveling speed. Further, as a device suitable for carrying out this method, in claim 2, a rotary flat that can run along the upper part of the cylinder is provided, and the drive system of the rotary flat is separated from the cylinder drive system to form a rotary flat drive system. In a card to which a flat motor that runs a rotation flat independently of the main motor of the cylinder drive system is connected, this flat motor is used as a variable speed motor, and a rotation detector that detects cylinder rotation is connected to the cylinder drive system. A control device for controlling the rotation of the variable speed motor in synchronization with the rotation of the cylinder based on a signal from the rotation detector is provided.

[0005]

According to the second aspect of the present invention, the rotation detector detects the cylinder rotation speed (rotation speed), and based on this detection signal, the control device synchronously controls the rotation of the variable speed motor as the flat motor. As a result, the traveling of the rotation flat is shifted in synchronization with the cylinder rotation. Therefore, when the cylinder is accelerated or decelerated, the traveling speed of the rotation flat is synchronized, and it is possible to prevent the quality deterioration of the card sliver that has conventionally occurred at the time of acceleration or deceleration of the cylinder, and
By using the variable speed motor, the traveling speed of the rotary flat can be changed according to the cotton material without changing gears.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is a cylinder, 2 is a doffer, and 3 is a take-in roller, which are rotatably supported on a frame (not shown). A flat device 4 is provided above the cylinder 1. In the flat device 4, a flat drive shaft 5 is rotatably supported on an upper portion of a flexible bend (not shown) fixed on the frame. Flat drive sprockets 6 are wedged at both ends of the flat drive shaft 5 in the machine width direction. A large number of rotary flats 9 are connected endlessly by connecting both ends of the machine flat width direction to flat chains 8 on the left and right sides of the machine base width direction, respectively, and the endless rotary flats 9 are directly wound around the chain sprocket 6. is there. Reference numeral 7 is a circular ring that guides an endless rotating flat 9. Therefore, when the chain sprocket 6 is rotated, a large number of rotating flats 9 run on the upper part of the cylinder 1 along the guide surface of the upper part of the cylinder bend in the direction of the arrow in the drawing, and between the cylinder 1 and the take-in roller. Contaminants, neps, leaf scum, etc. in the fibers supplied via 3 are removed, and a carding action is performed in which the fibers are carded in a certain direction. In some cases, the flat drive shaft 5 is arranged above the doffer 2. In this case, the traveling direction of the rotary flat 9 is opposite to that in the case of FIG.

The cylinder shaft 10 of the cylinder 1 has a gear,
Alternatively, a cylinder drive system 15 composed of a belt transmission system or the like is connected to the cylinder drive system 15, and a constant speed main motor MM is connected to the cylinder drive system 15. A rotation detector 14 for detecting the rotation speed (rotation speed) of the cylinder 1 is connected to the cylinder drive system 15. On the other hand, a flat drive system 16 separated from the cylinder drive system 15 is connected to the flat drive shaft 5, and the flat drive system 16 is also composed of a gear or a belt transmission device. A variable speed motor M as a flat motor is connected. The variable speed motor M is
In this embodiment, a general-purpose motor whose variable speed is controlled by an inverter device in the control device described later is used, but a servo motor may be used as the variable speed motor.

Next, the control device 20 includes a setting device 21 and a control unit 25. In the setting device 21, the ratio of the traveling speed of the rotary flat 9 to the rotational speed of the cylinder 1 during the spinning operation is set according to the cotton material. The control unit 25 includes a calculation unit 26 and an inverter device 27 as an output unit,
In the calculation unit 26, the synchronous traveling speed of the rotation flat 9 is calculated from the rotation speed (rotation speed) of the cylinder 1 input from the rotation detector 14 and the speed ratio (set value) set in the setting device 21, The synchronous traveling speed signal is output to the variable speed motor M via the inverter device 27 so as to obtain the calculated synchronous traveling speed.

Prior to the activation of the card, a rotary flat 9 with respect to the cylinder 1 is set in the setter 21 according to the type of cotton material.
Set the traveling speed ratio of. Then, the main motor MM is activated. Then, the cylinder 1 is accelerated according to the line A indicating the rotation speed of the cylinder 1 in FIG. When the cylinder 1 rotates, the rotation detector 14 detects the rotation speed of the cylinder 1 and transmits it to the control device 20. Control device 20
Then, the synchronous traveling speed of the rotary flat 9 is calculated from the transmitted current rotational speed of the cylinder 1 and the speed ratio of the setting device 21, and a synchronous traveling speed signal is output to the variable speed motor M based on the calculation result. . As a result, the rotating flat 9
In the acceleration zone Z1 of the cylinder 1, the traveling speed of the rotating flat 9 is accelerated in synchronization with the acceleration of the cylinder 1, as indicated by the line B indicating the flat traveling speed in FIG. In the steady rotation range Z2 in which the rotation speed of the cylinder 1 becomes the constant rotation speed H1 determined by the rated rotation of the main motor MM and the rotation transmission ratio determined by the cylinder drive system 15, the rotation flat 9 correspondingly. Also this cylinder 1
Traveling is controlled at a constant traveling speed V1 obtained by multiplying the constant rotation speed of the above by the speed ratio. When a stop command is given to the main motor MM that was driving the cylinder 1, the cylinder 1
Enters into deceleration rotation due to its inertia. In this deceleration zone Z3 as well, the rotation speed of the cylinder 1 is transmitted from the rotation detector 14 to the control device 20, and the traveling speed of the rotation flat 9 is decelerated in synchronization with the deceleration of the cylinder 1, similarly to during acceleration. At the same time as the cylinder stops, the rotary flat 9 also stops.

Thus, when the cylinder 1 is accelerated or decelerated,
Since the speed of the rotary flat 9 is changed in synchronism with the rotation of the cylinder 1, even if the cylinder 1 and the rotary flat 9 are driven by different motors, the carding action performed between the cylinder 1 and the rotary flat 9 is impaired. I can't. Further, the traveling speed of the rotary flat 9 depending on the cotton material may be changed only by changing the speed ratio to the setter 21, and the operator may change the gear or change the belt of the stepped pulley as in the conventional case. There is no work to get your hands dirty. In addition, the setter 21 sets a predetermined steady rotation speed (H
The steady running speed (V1) of the rotation flat 9 for 1) is set and input, the speed ratio between the two is calculated by the calculation unit, and the rotation flat is calculated from this speed ratio and the rotation speed of the cylinder 1 from the rotation detector 14. 9 may be speed-controlled.

Next, FIG. 3 shows another example of the synchronous traveling control. Here, during deceleration, the rotation flat 9
In the following description, the speed difference between the steady rotation speed V1 and the stop is divided into three equal parts and the speed is decelerated stepwise by 1/3 · V1. As shown in FIG. 3, in the setter 21, in order to decelerate the rotary flat 9 by ⅓ · V1, the traveling speed 2/3 of the rotary flat 9 corresponding to the cylinder speed range from H1 to H2. V1 is the traveling speed 1/3 of the rotating flat 9 corresponding to the speed range from the cylinder rotation speeds H2 to H3. V1 is the traveling speed of the rotating flat 9 corresponding to the speed range below the cylinder rotation speed H3. (Zero) is set as speed data, respectively. In this case, during deceleration, the cylinder rotation speed changes from the rotation detector 14 to the control device 2.
0, the arithmetic unit 26 of the control device 20 determines which speed section the current cylinder rotation speed is in, reads the traveling speed of the rotary flat 9 corresponding to the speed section from the setter 21, and When the synchronous traveling speed signal is output to the variable speed motor M via the inverter device 27 so that the traveling speed becomes the speed, the traveling speed of the rotary flat 9 is synchronously decelerated in a stepwise manner, and becomes equal to or lower than the cylinder rotational speed H3.
The speed is reduced according to a predetermined deceleration gradient of the inverter device 27, and the traveling of the rotary flat 9 is stopped in synchronization with the cylinder stop. Such step-synchronous shift may be performed during cylinder acceleration.

When the traveling control shown in FIG. 2 is performed, the control device is not limited to the above-mentioned one, and as shown in FIG. 4, the pulse signal output frequency from the rotation detector (tacho sensor) 14 for measuring the cylinder rotation speed is changed. A converter 31 for converting into a voltage, an amplifier 32 for amplifying this voltage, a setting volume 21a for setting the rotation speed of the variable speed motor M so that the rotation speed of the rotation flat 9 with respect to the cylinder rotation speed has a predetermined ratio, and an inverter. The control device 20a may be configured from the device 27. Also with this configuration, as shown in FIG. 2, the rotation flat 9 travels in synchronization with the cylinder rotation, and corresponding to the cotton material, only the setting value of the setting volume 21a is changed,
The steady traveling speed V1 of the rotary flat 9 can be changed.

[0013]

As described above, according to the present invention, in the case where the cylinder and the rotation flat are rotated by different motors, the rotation flat is shifted in synchronization with acceleration or deceleration of the cylinder, The deterioration of the quality of the card sliver that occurred during cylinder acceleration or deceleration can be prevented, and the flat motor that drives the rotary flat is a variable speed motor, so that only a command from the control device can be used to change gears. It is possible to easily change the steady running speed of the rotating flat according to the cotton material without performing.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of the present invention.

FIG. 2 is a velocity diagram showing a state of synchronous control of a cylinder and a rotation flat.

FIG. 3 is a velocity diagram showing a state in which the traveling speed of the rotary flat is synchronously changed stepwise.

FIG. 4 is another example of the control device.

[Explanation of symbols]

1 cylinder, 9 rotation flat, 14 rotation detector,
15 cylinder drive system, 16 flat drive system, 20
Control device, 21 setting device, 25 control unit, MM main motor, M variable speed motor

Claims (4)

[Claims] 1. A card comprising a cylinder and a rotary flat traveling above the cylinder, each of which is driven independently by a main motor and a flat motor, and the flat is synchronized with acceleration or deceleration of the cylinder. A rotation flat driving method for a card, characterized by changing a running speed. 2. A rotary flat that can run along the upper part of the cylinder is provided, the drive system of the rotary flat is separated from the cylinder drive system, and the rotary flat drive system is provided with the rotary flat independently of the main motor of the cylinder drive system. In a card to which a flat motor for running is connected, this flat motor is used as a variable speed motor, a rotation detector for detecting cylinder rotation is connected to the cylinder drive system, and a variable speed is detected based on a signal from the rotation detector. A rotation flat drive device for a card, comprising a control device for controlling rotation of a motor in synchronization with rotation of a cylinder. 3. The control device comprises a setting device for setting a traveling speed ratio of the rotation flat to the cylinder rotation speed, and a synchronous traveling speed signal of the rotation flat based on a detection signal from the rotation detector and a setting value of the setting device. 3. The rotary flat drive device for a card according to claim 2, further comprising a controller for outputting the variable speed motor to the variable speed motor. 4. The setting device, wherein the control device sets speed data for changing the synchronous traveling speed of the rotation flat in a stepwise manner with respect to the cylinder rotation speed during acceleration or deceleration of the cylinder, and the rotation detector. 3. The card rotation flat drive device according to claim 2, further comprising a control unit for outputting a rotation flat synchronous traveling speed signal to a variable speed motor in accordance with a detection signal from the motor and the speed data.