JPH06264337A - Cloth roll monitoring apparatus - Google Patents

Abstract

PURPOSE:To accurately and properly detect the abnormality in the winding of woven cloth on a cloth roll according to the weaving state. CONSTITUTION:The apparatus is provided with a rotor 38 rotating according to the motion of woven cloth 26, a cloth roll 34 rotated by a driving apparatus 36 to wind the woven cloth 26 and a rotation detection means 41 to detect the rotation state of the rotor 38. The apparatus is further provided with a transfer speed detection means 41 to detect the normal transfer speed of the woven cloth 26, a threshold value calculation means 44 to calculate a prescribed threshold value for judging the rotation state of the cloth roll 34 based on the normal transfer speed of the woven cloth 26 detected by the transfer speed detection means 41 and a comparison means 42 to compare the value obtained by the rotation detection means 41 with the threshold value obtained by the threshold value calculation means 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross roll monitoring device for a cloth winding device that winds a woven fabric sent from a loom on a cross roll.

[0002]

2. Description of the Related Art Conventionally, in a cloth winding device that winds a woven fabric sent from a loom on a cross roll, a device for monitoring the driving state of the cross roll is a woven fabric cut on an empty cloth roll. Japanese Patent Laid-Open No. 1-110063 discloses a device that detects whether or not the tip portion is securely wound.
Or JP-A-2-52839. This detection method utilizes the fact that the roll shaft center connected to the cross roll shaft is connected to the drive shaft via a friction clutch. That is, when the empty cross roll is driven, the friction clutch does not slip and the roll shaft center rotates at a rotation speed equal to the rotation speed of the drive shaft. However, when the cloth is wrapped around the cloth roll,
A load is applied and the friction clutch slips. Therefore, a change in the number of revolutions of the roll shaft center due to this slip or a difference in the number of revolutions of the drive shaft and the roll shaft center is detected, and this difference is compared with a predetermined threshold value to ensure that the cloth roll is woven on the cross roll It is judged whether it has been wrapped.

[0003]

Since the cross roll monitoring device for the cloth winding device of the above-mentioned prior art sets the threshold value for comparison to a constant value, the rotation speed of the loom or the driving density is changed. Even when the moving speed of the woven fabric is changed, the difference in the number of rotations may occur, and it may be determined that the weaving is normal but abnormal. This change in the number of revolutions and the shot density usually occurs when the gimmick of the weaving product is changed, and the threshold value of the cross roll monitoring device must be changed each time the change is made. Further, even during the weaving of the same woven fabric, there are cases in which control is performed to positively change the rotational speed and the shot density according to the pattern and the like.
However, the conventional cross roll monitoring device cannot be used for such a woven fabric.

The present invention has been made in view of the above-mentioned problems of the prior art.
An object of the present invention is to provide a cross roll monitoring device capable of accurately and appropriately detecting a weaving condition.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a rotating body such as a cross roll or a drive roller which rotates with the movement of a woven fabric, a cross roll around which a woven fabric is wound by being driven by a drive device, and the above rotating body. Rotation detecting means for detecting the rotation state of the woven fabric, the moving speed detecting means for detecting the moving speed of the woven fabric to be woven in the normal state, and the normal state of the woven fabric detected by the moving speed detecting means. Based on the moving speed of, the threshold value calculating means for calculating a predetermined threshold value for judging the rotation state of the cross roll, the value obtained by the rotation detecting means, and the threshold value calculating means. It is a cross roll monitoring device provided with a comparison means for comparing the obtained threshold value.

The moving speed detecting means is the rotation detecting means for detecting the number of rotations of the rotating body.
A storage device for storing a normal value of the rotation speed obtained by the rotation detection means is provided, and the output of the storage device is input to the threshold value calculation means, and the threshold value is calculated based on the output of the storage device. It is something. Further, the moving speed detecting means includes a loom control device that outputs the number of revolutions and the driving density of the loom, and a cloth moving speed calculator that calculates the moving speed of the woven fabric based on the number of rotations and the driving density of the loom. It consists of Further, the cross roll monitoring device of the present invention,
At a predetermined time, there is a judging device for judging the winding abnormality of the woven cloth based on the output of the comparing means, and the judging device determines the value obtained by the rotation detecting means based on the output of the comparing means. When it is smaller than the threshold value, a loom stop signal is output.

[0007]

According to the cross roll monitoring apparatus of the present invention, the rotation state of the rotating body rotating with the movement of the woven cloth is determined by the moving speed detecting means based on the actual moving speed of the woven cloth in the normal state. By comparing with a threshold value calculated based on the above, abnormal winding of the woven cloth around the cross roll is detected, and predetermined control such as stopping of the loom is performed. Therefore, even when weaving is performed while changing the moving speed of the woven fabric, the threshold value for determining the presence or absence of abnormality is set according to the moving speed of the woven fabric, so that the winding operation is accurate and precise. It is possible to detect an abnormality.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. In a loom provided with a cross roll monitoring device of this embodiment, as shown in FIG. 2, a warp yarn 12 wound around a delivery beam 10 is , The tension roll 14 and the heddle 16 to the weft inserting section 18. An opening 22 for the warp yarn 12 is formed in the weft insertion portion 18 for weft insertion by a weft insertion device (not shown), and a reed 24 is provided swingably. The woven cloth 26, which has been weft-inserted, beaten, and woven, is wound around a winding roller 28, and then passed through a guide roller 30 and then wound around a cross roll 34 provided in a cloth winding device 32 by a predetermined amount.

The cloth winding device 32 is a so-called contact winding type cloth winding device, and as shown in FIG.
A drive roller 37, which is a rotating body that is rotated by 6, and a driven roller 38, which is a rotatably provided rotating body, are attached in parallel to each other. The drive roller 37 and the driven roller 38 support the side surface of the cross roll 34 around which the woven cloth 26 is wound and are driven to rotate.
Further, between the driving roller 37 and the driven roller 38 of the cloth winding device 32, the cloth 26 is securely wound around the shaft center 35 of the cross roll 34 at the beginning of winding the cloth end of the cloth 26. As it goes, a cross guide 50 is provided in close proximity to the shaft center 35 with a predetermined interval according to the curvature of the shaft center 35.

The drive motor 36 is connected to a control device (not shown) that outputs a drive signal via an amplifier 39. Further, the cloth winding device 32 is provided with a cross roll monitoring device 40 for monitoring the rotation state of the cross roll 34. The cross roll monitoring device 40 includes the driven roller 3
A tacho generator 41, which is a rotation detecting unit that detects the number of revolutions of the eight, is provided coaxially with the driven roller 38, and a signal obtained by the tacho generator 41 is input to a comparator 42 that is a comparing unit. The tacho generator 41 is also a moving speed detecting means for detecting the moving speed of the woven cloth, and its output is also input to the storage device 43. A threshold calculator 44, which is a threshold calculator for calculating and outputting a threshold, is connected to the comparator 42, and the output of the comparator 42 is input to a determiner 46 that outputs a loom stop signal. ing. Then, the determiner 46 is provided with the drive roller 3
The drive signal for driving 7 is input through the on-delay circuit 48 that delays the rising edge of the drive signal by a predetermined time T.

The threshold value calculated by the threshold value calculator 44 is a value obtained by multiplying the output of the storage device 43 storing the output of the tachogenerator 41 by a predetermined coefficient k, for example, k = 0.8. Tachometer 4 stored in storage device 43
The output of 1 is a value when a predetermined measurement command signal is issued. The measurement command signal is a signal for turning on the measurement mode switch by a manual switch, a signal issued after a lapse of a predetermined time after which the loom is in a steady operation state after starting the loom, a signal for changing the loom rotation speed, or a driving density changed. The signals are appropriately combined. Also, this memory 4
As the value to be stored in 3, a plurality of output values may be read within a predetermined period and an average value thereof may be stored.

In the operation of the loom of this embodiment, first, as is well known, the warp yarn 12 fed from the feed beam 10 is interlaced with the weft yarn 20 put in the weft inserting portion 18 to form a woven fabric 26. , And is wound around the cross roll 34.
To start winding the cross roll 34 around the shaft center 35, first, the fully wound cross roll 34 is moved to the side, and the shaft center 35 of the empty cross roll 34 is placed between the drive roller 37 and the driven roller 38. The woven cloth 26 is cut, and the cloth end on the loom side is wound around the shaft center 35. Axis 35 of cross roll 34
The leading end portion of the woven fabric 26 wound around the shaft goes around the shaft center 35 to reach the contact portion between the drive roller 37 and the shaft center 35, and is further guided by the cross guide 50 to follow the driven roller 38 and the shaft center 35. Sent between and. Then, this cloth edge is sandwiched between the woven cloths 26 that are sequentially fed out, and the cloth edges of the woven cloth 26 are reliably wound. After that, as the woven cloth 26 is woven, the diameter of the woven cloth 26 wound around the cross roll 34 increases, and when the woven cloth 26 reaches a predetermined weaving length, the cross roll 34 is replaced.

Next, the operation and operation of the cross roll monitoring device 40 of this embodiment will be described with reference to FIGS. In this embodiment, when the loom operating signal indicating the operating state of the loom is L, that is, when the cross roll replacement signal indicating that the loom is stopped and the cross roll 34 is being replaced is H, the drive signal of the drive roller 37 becomes L. The drive of the drive motor 36 is stopped and the drive roller 37 is stopped. After the operation of the loom is started and the exchange of the cross roll 34 is completed, the drive signal of the drive motor 36 becomes H, and the drive roller 37 rotates. The drive signal is also input to the on-delay circuit 48, and the output of the on-delay circuit 48 becomes H after a predetermined time T after the drive signal becomes H, and the determination output of the determiner 46 is output.

A drive signal is output and the drive motor 3
When 6 operates, the drive roller 37 rotates, and this rotation is transmitted to the driven roller 38 via the cross roll 34. At this time, as described above, the tip end of the woven fabric 26 has the shaft center 35.
Wrapped around. When the woven cloth 26 is wound, the cross roll 34 rotates and the driven roller 38 starts to rotate, and the rotation speed is output from the tachogenerator 41. The output of the tachogenerator 41 is converted into a DC output signal corresponding to the rotation speed and is input to the comparator 42. And
The comparator 42 compares the threshold value with the threshold value from the threshold value calculator 44, and when it is equal to or higher than the threshold value, the output of the comparator 42 becomes H.

Here, the driven roller 38 does not rotate because the cross roll 34 has not rotated before the winding of the woven cloth 26, and after the winding is reliably performed, the rotation of the driven roller 38 is stable. To do. Therefore, in order to delay the determination signal of the determination device 46 based on the output of the comparator 42 for a predetermined period T which is longer than the period until the rotation of the driven roller 38 is stabilized, the drive signal is input to the determination device 46 via the on-delay circuit 48. It is what is made.

The output of the tachogenerator 41 is stored in the memory 43 by a measurement command signal issued at a time when the loom and the cloth winding device 32 should be in a predetermined steady operation state, and is stored by the threshold calculator 44. A value obtained by multiplying the value by a predetermined coefficient k, for example, k = 0.8 is output to the comparator 42 as a threshold value. The measurement command signal of this embodiment is a manual signal, a signal issued after a predetermined time has elapsed after the loom is started and the loom is in a steady operation state, and after a period shorter than T, or a signal in which the loom rotational speed is changed, or This is a signal that changes the implantation density.

Then, the output of the tacho generator 41 after a predetermined period T from the start of rotation of the drive roller 37 by the on-delay circuit 48 is a threshold value calculated from the output value of the tacho generator 41 in the steady state as described above. If it is lower, the output of the comparator 42 becomes L,
A loom stop signal is output. On the contrary, when the output of the tacho generator 41 after the lapse of a predetermined period T from the start of the rotation of the drive roller 37 is equal to or more than the calculated threshold value, the loom stop signal is not output and the woven cloth is wound. Be seen. And
Even during the subsequent operation of the loom, the rotation of the driven roller 38 is constantly compared by the comparator 42 as the output of the tachogenerator 41, and the comparison result is input to the determiner 46.
The loom stop signal can be obtained even when abnormal rotation of the cross roll 34 occurs during operation of the loom. here,
When the number of revolutions of the loom is changed, the output value of the tacho generator stored in the storage unit 43 is also changed by the change signal, and the threshold value is calculated by the threshold value calculator 44 based on the changed value. It is calculated and output to the comparator 42.

The abnormalities of the cloth winding device 32 are as follows: (1) When the cloth end after the exchange of the cross roll is not reliably wound around the shaft center 35 of the cross roll 34 and is jammed between the shaft center 35 and the drive roller 37, (2) When the driving torque of the driving roller is too large and the driving roller 37 slips between the cross roll 34 and the driving roller 37, (3) the driving torque of the driving roller 34 is too small and the driving roller 37 is If it stops or rotates only below the weaving speed of the woven fabric 26,
(4) The drive mechanism of the drive roller 37 may fail and the drive roller may not rotate. In the case of (1) above, the driven roller does not rotate, but the drive roller 37 rotates at a high speed equal to or higher than a predetermined value. Further, in the case of (2) above, the drive roller rotates at a high speed equal to or higher than a predetermined value, and the driven roller 38 stops or rotates at a low speed. Further, in the case of (3) above, both the driving roller 37 and the driven roller 38 rotate at a low speed below a predetermined value or stop. In the case of the above (4) abnormality, the drive roller 37
Does not rotate, the driven roller 38 also does not rotate.

Therefore, according to the cross roll monitoring apparatus of this embodiment, the threshold value of the threshold value calculator 44 is the value obtained from the output value of the tachogenerator 41 obtained when the driven roller 38 is normally rotating. Since it is based on this, it is not necessary to change the setting of the threshold value for each normal change of the moving speed of the woven fabric, and it is possible to detect abnormal winding of the cloth edge and abnormal rotation of the cloth winding device 32 during the loom operation. It is possible to detect accurately and precisely.

Next, a second embodiment of the present invention will be described with reference to FIG.
A description will be given based on FIG. Here, the same members as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. In the cross roll monitoring device 60 of this embodiment, the rotary encoder 61 detects the rotation of the driven roller 38, which is a rotating body. The output of the rotary encoder 61 is input to the first counter 62 and the second counter 63, and the outputs of the first and second counters 62 and 63 are respectively the first comparator 64 and the second comparator 65. Are typing in. Here, the set of the rotary encoder 61 and the first and second counters 62 and 63 constitutes the rotation detecting means of the present invention. The first comparator 64 and the second comparator 65 are respectively connected to threshold value calculators 66 and 67 which are threshold value calculating means, and a predetermined threshold value to be compared is input. ing. The output of the first comparator 64 is input to the first determiner 68, and the output of the second comparator 65 is input to the second determiner 69. Also, the first counter 6
No. 2 is reset by the winding start signal, and this winding start signal is also input to the first judging device 68 via the timer 70 of T1 time. In addition, the second counter 63
Is reset by an oscillator 71 that generates a pulse every predetermined period T2, and the output of the oscillator 71 is the second judging device 6
It is also connected to 9.

The threshold calculators 66 and 67 include a memory 7
The output of 2 is connected, and the storage device 72 has a tacho-generator 73 attached to the winding roller 28 of the woven cloth 26.
The output of is input. This tacho generator 73
A moving speed detecting means for detecting the moving speed of the woven cloth. Furthermore, the measurement command signal similar to that of the first embodiment is input to the memory 72. In addition, the threshold calculators 66, 6
7, the coefficient k multiplied by the output value of the tacho generator 73 is calculated by the threshold calculator 66 input to the first comparator 64 and the threshold calculator 66 input to the second comparator 65. The value differs from that of the device 67. This is because the normal rotation state at the time of winding the woven cloth immediately after the replacement of the cross roll 34 and the normal rotation state of the cloth winding device 32 are different. However, the values may be set to approximately equal values.

In the operation of the cross roll monitoring device 60 of this embodiment, first, the rotation of the driven roller 38 is output as a rotation pulse by the rotary encoder 61, and
It is counted by the second counters 62 and 63. The first counter 62 starts counting by the winding start signal of the woven cloth, and the second counter 63 is reset by the drive signal of the drive roller 37 every T2 period while being reset.
Count the period.

First, when detecting the abnormal rotation of the driven roller 38 immediately after the replacement of the cross roll, that is, the defective winding of the cloth edge, the output of the first counter 62 is compared by the first comparator 64. The first counter 62 starts counting by the winding start signal, and the count value is input to the comparator 64. If the cloth edge is not wound normally, the count number does not increase because the cross roll 34 does not rotate and the driven roller 38 does not rotate. Therefore, T1
The count value after the period becomes a value lower than the threshold value R1 calculated from the output of the tacho generator 73 attached to the winding roller 28, the comparison output of the first comparator 64 becomes L, and the first determination is made. The container 68 outputs a loom stop signal. On the other hand, the cloth edge normally wraps around the cross roll, and T1
When the count value after the period becomes a value higher than the threshold value R1, the first judging device 68 does not output the loom stop signal. The first counter 62 does not count more than a predetermined count value after the period T1 and has a constant output until it is reset by the next winding start signal.

Next, in the case of abnormal rotation of the cloth winding device 32 during steady operation, the output of the second counter 63 is compared with the threshold value R2 input to the second comparator 67, and every predetermined T2 period. The second judging device 69 outputs a loom stop signal according to the output value of the comparator 65. That is, as described in the first embodiment, the rotation of the driven roller is reduced or stopped due to the cloth winding abnormality even during the steady operation.
When the count value for each 2 is smaller than the threshold value R2 calculated from the output of the tacho generator 73 attached to the winding roll 28, it indicates that the rotation state of the driven roller 38 is not normal, and the second determining device is used. 69 outputs a loom stop signal. Similar to the first embodiment, the threshold values R1 and R2 are also calculated by the output of the tacho generator 73 at the time when the predetermined measurement command signal is output, and the normal operating state at that time. It is calculated based on the output value in.

The cross roll monitoring apparatus of this embodiment can also reliably and automatically detect abnormal rotation in the changed state even when the cloth moving speed normally changes during operation. Not only at the beginning of winding the woven cloth, but also abnormal rotation during weaving can be reliably detected.

Next, a third embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. The cross roll monitoring device 80 of this embodiment is similar to the cross roll monitoring device of the second embodiment, except that the threshold value calculators 66 and 67 are used.
The loom control device 81 and the fabric movement speed calculator 82 are used as the woven fabric movement speed detection means for obtaining the data input to the loom. The loom control device 81 controls the operation of the loom, and outputs the number of revolutions and the driving density of the loom among the control signals to the cloth moving speed calculator 82, and the cloth moving speed calculator 82 moves the cloth. The speed is calculated. Furthermore, if necessary, the weaving shrinkage rate may be multiplied by the woven cloth moving speed. Then, the timing of calculating the cloth moving speed is based on the calculation command signal which is the same signal as the measurement command signal.

The cross-roll monitoring apparatus of this embodiment also has the same operation and operation as those of the second embodiment, and the same effect can be obtained. Furthermore, the movement speed of the woven cloth can be detected from the data from the loom control device 81 only by software calculation, and the device can be simplified. Furthermore, since the value input to the threshold value calculator does not take data from the actual drive roller etc., the value at the time of abnormality of the loom or the cloth winding device is not input, and the wrong threshold value is input. Never calculated.

The cross roll monitoring device of the present invention is
The cloth winding device is not limited to the above-described embodiment, but can be applied to a so-called center drive type cloth winding device in addition to the contact winding type. Further, the rotating body to be monitored may be any of the driven roller, the driving roller and the cross roll itself in the contact winding type cloth winding device, and may be the cross roll itself in the case of the center drive type cloth winding device. Further, the moving speed detecting means of the woven cloth indicates a rotation state from a winding roller, a guide roller of the loom, a driving roller of the cloth winding device, a driven roller, a cross roller, and the like which rotate with the movement of the woven cloth. Alternatively, the moving speed of the woven fabric may be calculated based on the loom control data from the control device, as in the third embodiment. When calculating this cloth movement speed, the loom rotation speed is
Either the set rotation speed or the actual rotation speed obtained by measuring the number of picks per unit time may be used.

When the drive roller of the contact winding type cloth winding device is employed as the rotating body to be monitored, the rotation speed may be lower than a predetermined value or higher than a predetermined value depending on each mode of the abnormality described above. Therefore, both upper and lower thresholds are set, and if the rotational speed of the drive roller deviates from both of these thresholds, it is determined to be abnormal. On the other hand, if the driven roller of the contact winding type cloth winding device is adopted as the rotating body to be monitored as in each of the above-described embodiments, all abnormal modes can be obtained only by comparing with one lower threshold value. Can be detected, and there is an effect that the circuit configuration for abnormality determination can be simplified.

Further, in the cross roll monitoring device of the present invention, in order to guarantee that the data of the cloth moving speed inputted to the comparator calculating means is a normal value, it is obtained by the cloth moving speed detecting means. The obtained value is compared with a predetermined threshold value, and when it is less than or equal to the threshold value, it may not be output to the threshold value calculating means.

[0031]

Since the cross roll monitoring device of the present invention monitors the rotating body of the cloth winding device such as a cross roll based on the normal moving speed of the cloth obtained when the loom is rotating normally, Even if the setting of the moving speed is changed or the weaving speed is normally changed, it is not necessary to change the setting of the threshold value input to the comparing means each time. Therefore, the abnormal winding of the cloth edge and the abnormal rotation of the cross roll during the operation of the loom can be accurately and precisely detected.

[Brief description of drawings]

FIG. 1 is a block diagram of a cross roll monitoring device according to a first embodiment of the present invention.

FIG. 2 is a schematic explanatory diagram of a loom provided with the cross roll monitoring device according to the first embodiment.

FIG. 3 is a time chart showing the operation of the cross roll monitoring apparatus of the first embodiment.

FIG. 4 is a block diagram of a cross roll monitoring device according to a second embodiment of the present invention.

FIG. 5 is a time chart showing the operation of the cross roll monitoring system according to the second embodiment.

FIG. 6 is a partial block diagram of a cross roll monitoring device according to a third embodiment of the present invention.

[Explanation of symbols]

 32 cloth winding device 34 cross roll 36 motor 37 drive roller 38 driven roller 40 cross roll monitoring device 41 tacho generator 42 comparator 44 threshold value calculator 46 judger

Claims (4)

[Claims] 1. A rotating body that rotates with movement of a woven fabric,
In a cross roll monitoring device provided with a cross roll which is rotationally driven by a drive device and around which a woven fabric is wound, and a rotation detection means which detects a rotational state of the rotating body, movement of the woven fabric to be woven in a normal state. A moving speed detecting means for detecting the speed, a threshold calculating means for calculating a threshold value which is a judgment criterion based on the moving speed of the woven cloth detected by the moving speed detecting means, and the rotation detecting means. A cross-roll monitoring device, comprising: a comparison unit that compares the obtained value with the threshold value obtained by the threshold value calculation unit. 2. The moving speed detecting means is the rotation detecting means for detecting the number of rotations of the rotating body, and is provided with a memory for storing a normal value of the number of rotations obtained by the rotation detecting means. 2. The cross roll monitoring device according to claim 1, wherein the output of the container is input to the threshold value calculating means to calculate the threshold value. 3. The locomotive speed detection means outputs a rotational speed and a driving density of the loom, and a cloth moving speed calculation for calculating a moving speed of the woven cloth based on the rotational speed and the driving density of the loom. A container comprising a container and a container.
The described cross roll monitoring device. 4. The rotating body is a driven roller of a contact winding type cloth winding device, and the output of the comparing means determines a winding abnormality of the woven cloth based on the output of the comparing means at a predetermined time. 3. The weaving machine stop signal is input when the value obtained by the rotation detecting means based on the output of the comparing means is smaller than the threshold value. 3. The cross roll monitoring device described in 3.