JPH0357223B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a stable running control method for controlling the stable running of a fabric, and a device used therefor.

[Prior art] When performing treatments such as scouring, bleaching, and dyeing on a strip of fabric, the fabric is transferred from another process to a processing machine, or the fabric is supplied to a processing machine, and the fabric is taken out, etc., continuously. Therefore, the fabric is sequentially run in the longitudinal direction. This state is schematically shown in the 9th
As shown in the figure. In the figure, 1 is a processing tank, and a fabric 6 is introduced into the processing tank 1 and taken out using four rolls 2, 3, 4, and 5. Further, 7 and 8 are drive rolls that cause the fabric 6 to run in the direction of the arrow.

[Problem that the invention seeks to solve]

In such running of the fabric 6, stable running is maintained if the fabric 6 is not tangled due to twisting or slack, but if tangles occur due to processing in the processing tank 1, the fabric 6 will not be tangled. It is not easy to take out the fabric, and the running of the fabric 6 tends to be delayed.
If the fabric 6 is pulled by forcefully rotating the drive rolls 7 and 8 in this state, the fabric 6 may be damaged or
In severe cases, the fabric 6 may be cut. Therefore, in order to avoid the above situation,
A worker is always placed on the fabric take-out side of the treatment tank 1 to monitor the running state of the fabric 6, and if the fabric 6 becomes tangled and the running is delayed, the worker unravels it manually or if the tangle cannot be unraveled. The driving rolls 7 and 8 are stopped at this time. Therefore, a worker must constantly monitor the running state of the fabric 6, and this has become a major problem as other processes are being streamlined. In contrast, a rotating roll (hereinafter referred to as a "sub rotating roll") that rotates following the running of the fabric
Attempts have been made to automatically monitor the running of the fabric 6 by reading the rotation of the fabric 6 with a single sensor and notifying a reduction in rotational speed or stoppage of rotation with an abnormal signal. However, when the fabric 6 is rolled up onto the secondary rotating roll and tries to return to its original position, a sudden reverse rotation may occur. Due to the high speed, the sensor cannot detect it as a speed abnormality. When the fabric 6 runs,
Since reversal of the slave rotating roll as described above often occurs, there is no practical value unless an abnormality can be detected even in the above case. Therefore, it is desired to establish a method that can detect not only speed abnormalities but also forward rotation and reverse rotation of the slave rotating roll.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a method and a control device for use in the method that can automatically control stable running of a fabric by detecting speed abnormalities and reverse rotations of the slave rotating roll. shall be.

[Means for solving problems]

In order to achieve the above object, the present invention attaches a small piece-shaped detection plate to a rotating roll that rotates following the running of the fabric so as to rotate integrally with the rotating roll, and connects two sensors A and B. are arranged at different positions on the rotation trajectory of the detection plate, and the sensors A and B are arranged at different positions on the rotation locus of the detection plate.
The movement of the detection plate passing through is continuously detected and the rotation status of the rotating roll is replaced with an electrical signal.
This is a method for controlling the stable running of a fabric, which ensures stable running of the fabric by comparing this with a preset control value and controlling the running of the fabric. The first method is to provide a stable running control method for a fabric in which the signal pattern is set to be different when the rotating roll rotates forward and backward, so that not only the rotational speed of the rotating roll but also forward rotation and reverse rotation can be differentiated and controlled. The gist is a small piece-shaped detection plate that rotates integrally with a rotating roll that rotates to follow the running of the fabric, and a small piece-shaped detection plate that is placed on the rotation trajectory of this detection plate and that continuously detects the movement of the detection plate and generates an electrical signal. Sensor A, which is also placed on the rotation locus of this detection plate but at a different position from the above sensor A, continuously detects the movement of the detection plate with a phase shift from the above sensor A. a sensor B that replaces the detection signal with an electrical signal; a measuring means that measures the rotational speed of the rotary roll from the detection signal of the sensor A or the sensor B; and the rotational speed output from the measuring means is within an appropriate speed range. a first determining means that determines whether the speed is out of the proper speed range and outputs an abnormal signal if the speed is out of the appropriate speed range; and a first determining means that determines whether the rotating roll is in a normal rotation state or a reverse rotation state from the continuous signal pattern of both the sensor A and the sensor B. A second discriminating means for discriminating whether the fabric is reversed and outputting an abnormal signal when the fabric is reversed, and a running stop means for stopping the running of the fabric in response to the abnormal signal output from either of the two discriminating means. The second gist is the stable running control system.

[Effect]

That is, the present invention numerically detects the rotational state of a rotary roll that rotates following the running of the fabric, and if there is an abnormality in the rotational state, the running is stopped to ensure stable running of the fabric. I made it controllable. In particular, in the present invention, an abnormality in the rotational state is detected not only by the rotational speed, but also whether the rotating roll is in a normal rotation state or a reversed state. A major feature is that even if the rotating roll rotates at a constant speed in the opposite direction due to a piece of fabric, it can be detected as a running abnormality.

Next, the present invention will be explained in detail based on examples.

〔Example〕

FIG. 1 shows an embodiment of a stable running control device for a fabric used in the present invention. In the figure, 10 is a rotating roll that contacts the fabric 6 and rotates to follow the running of the fabric 6, and 11 is attached to the tip of the rotating shaft of the rotating roll 10 at right angles to the axis so as to rotate together with the rotating roll 10. semicircular detection plate, 12,
13 is a sensor sensitive to the approach of the detection plate 11, such as a proximity switch. And the above sensor 1
2 and 13 are connected to a control device 14 consisting of a known computer. This control device 14 is
Upon receiving the signals from the sensors 12 and 13, the fabric 6
A stop signal is issued to the drive source 15a of the drive roll 15 that runs the drive roll 15.

In this device, as the semicircular detection plate 11 rotates, the sensors 12 and 13 move the detection plate 11 as follows.
Detects the rotation status of. That is, in the state shown in FIG. 2, both sensors 12 and 13 are turned on, and in the state shown in FIG.
turns on. From this state, the detection plate 11
In the state shown in Figure 4, where the sensor is further rotated 90 degrees, sensor 1
2 and 13 are both turned off, and in the state shown in FIG. 5 in which the detection plate 11 is further rotated 90 degrees from this state, the sensor 12 is turned on and the sensor 13 is turned off. Therefore, if the detection signals of the sensors 12 and 13 in this case are shown continuously every 90 degree rotation of the detection plate 11, a pattern as shown in FIG. 6 will be obtained. In the figure, ◯ indicates on and × indicates off.

Furthermore, when the detection plate 11 rotates in the direction opposite to the arrow from the state shown in FIG. 2, the relationship between the detection plate 11 and the sensors 12 and 13 is as follows:
FIG. 3 and the above are reversed, and the detection signal pattern is as shown in FIG. 7.

In this way, in the above device, different signal patterns can be obtained depending on the rotation direction of the detection plate 11, that is, the rotation direction of the rotating roll 10.

On the other hand, details of the control device 14 are shown in FIG. Built into the control device 14 are a first storage means, a first determination means, a second storage means, a second determination means, a measurement means, and a drive stop signal output means.

Reverse control in this device is performed as follows. That is, first, a signal pattern is stored in the first storage means in the control device 14 during normal rotation of the rotary roll 10 (rotation direction during normal fabric running). On the other hand, the sensor 1 is always present in the first discrimination means.
A continuous signal pattern is obtained by inputting detection signals from 2 and 13, and is compared with the stored pattern to determine whether it is different or different. When a signal pattern different from the stored pattern is determined (when the rotary roll 10 is reversed), a drive stop signal is immediately output from the drive stop signal output means to the drive source 15a of the drive roll 15, thereby stopping the running of the fabric 6. It can be stopped.

In addition, this device is capable of not only the above-mentioned reversal control, but also
The rotation speed of the rotating roll 10 can also be controlled. That is, first, the upper and lower limits of the rotational speed of the rotary roll 10 are stored in the second storage means in the control device 14. On the other hand, the sensor 12,
The rotational speed of the rotary roll 10 is constantly detected by measuring the signal pattern of any one of the sensors 13 with a measuring means in the control device 14, and the value is inputted to the second determining means. When the detected value exceeds the stored appropriate range (when the rotational speed is abnormal), a drive stop signal is immediately output from the drive stop signal output means to the drive source 15a of the drive roll 15, and as described above, Running of the fabric 6 can be stopped.

Therefore, if this device is used, it is possible to automatically detect abnormal running of the fabric 6, that is, running at a speed that deviates from the proper speed, or reverse running of the rotating roll 10, and stop the running, so that the worker can stop the running. This eliminates the need for constant monitoring, resulting in significant labor savings.

In the above embodiment, instead of stopping the running of the fabric 6, by attaching an inverter or the like to the drive source 15a and calculating in the control device 14 how much the rotational speed has deviated from the appropriate range,
It is also conceivable to automatically adjust the drive of the drive roll 15 so that the rotation is within an appropriate range. However, normally, when abnormal rotation of the rotating roll 10 occurs, some kind of trouble has occurred in the running process of the fabric 6, and unless this trouble is investigated and resolved, the stable running of the fabric will not be restored. Therefore, it can be said that it is practical to temporarily stop running and have the operator investigate and solve the problem at that stage.

In the present invention, the shape of the detection plate 11 and the arrangement of the sensors 12 and 13 are not limited to the above embodiments, but can be any shape as long as the condition that different signal patterns are obtained when the rotary roll 10 rotates forward and reverse is satisfied. There is no problem with setting it like this.

Further, as the sensors 12 and 13 used, in addition to the proximity switch exemplified in the above embodiment, various sensors such as a micro switch and a photoelectric switch can be used.

〔Effect of the invention〕

As described above, according to the present invention, if there is an abnormality in the running of the fabric, the running is automatically stopped, so that the stable running of the fabric can be maintained even if the operator does not constantly monitor the running of the fabric. Become. In particular, in the present invention, running abnormalities are not only detected by the rotational speed of the rotating rolls, but also whether the rotating rolls are rotating in the forward or reverse direction. A great advantage is that even if the rotating roll rotates in the opposite direction at a constant speed due to sticking or fabric breakage, it can be detected as a running abnormality.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the stable running control device for fabric used in the present invention, and FIGS. 2, 3, 4, and 5 show the relationship between the detection plate and two sensors. Explanatory drawings, FIGS. 6 and 7 are schematic diagrams of detection signal patterns by sensors, FIG. 8 is a configuration diagram showing an example of a control device used in the present invention, and FIG. 9 is an explanatory diagram showing normal running of a fabric. It is. 10...Rotating roll, 11...Detection plate, 12,
13...sensor, 14...control device, 15...drive roll, 15a...drive source.

Claims (1)

[Claims] 1. A small piece-shaped detection plate is attached to a rotating roll that rotates following the running of the fabric so as to rotate integrally with the rotating roll, and two sensors A and B are connected to the detection plate. The movement of the detection plates placed at different positions on the rotation locus and passing through the sensors A and B is continuously detected, and the rotation state of the rotation roll is replaced with an electrical signal, which is converted into a preset control value. A method for controlling the stable running of a fabric, which ensures stable running of the fabric by controlling the running of the fabric in contrast to the above, in which the signal pattern of the sensors A and B that detect the movement of the detection plate is set to the normal rotation of the rotating roll. A stable running control method for a fabric, characterized in that not only the rotational speed of a rotary roll but also forward rotation and reverse rotation can be differentiated and controlled by setting different settings for when the rotation speed and reverse rotation occur. 2. A small piece-shaped detection plate that rotates integrally with a rotating roll that rotates to follow the running of the fabric, and a small piece-shaped detection plate that is placed on the rotation trajectory of this detection plate, and that continuously detects the movement of the detection plate and generates an electrical signal. Sensor A is also placed on the rotation trajectory of this detection plate and at a different position from the sensor A, and the movement of the detection plate is detected by
A sensor B that continuously detects the sensor A with a phase shift and replaces it with an electrical signal, a measuring means that measures the rotational speed of the rotating roll from the detection signal of the sensor A or the sensor B, and the measuring means a first determining means for determining whether or not the rotational speed output from the sensor A is within a proper speed range and outputting an abnormal signal if the rotational speed is outside the proper speed range;
and a second determining means that determines whether the rotating roll is in a normal rotation state or a reverse rotation state based on continuous signal patterns of both sensors B and outputs an abnormal signal when the rotating roll is in a reverse rotation state, and an output from one of the two determination means described above. 1. A stable fabric running control device comprising: a running stop means for stopping the running of the fabric in response to an abnormal signal received by the fabric. 3 The detection plate is semicircular, and the identification pattern of the two sensors A and B is one in which both sensors A and B detect the detection plate, and one in which only one of sensors A and B detects the detection plate. The following four patterns are set to be repeated in this order: an identification pattern in which both sensors A and B detect the detection plate, an identification pattern in which only one sensor detects the detection plate, and an identification pattern in which only one sensor detects the detection plate. The stable running control device for a fabric according to claim 2.