JP2012149365A - Warp feeding method and device in loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably carry out control for maintaining tension of a warp in a desired state during a warp feeding operation in which a warp is continuously fed while a loom being stopped.SOLUTION: A warp feeding method in a loom in which a delivering device 5 and a winding device 8 use as a drive source a delivering motor 5c and a winding motor 8c independent of a main driving motor of the loom, respectively, the method comprises: carrying out a warp feeding operation by driving the delivering motor 5c and the winding motor 8c while the main driving motor being stopped, and detecting tension of a warp during the warp feeding operation; comparing a warp tension value based on the detection with a preset reference value of warp tension; and, when the warp tension value deviates from the reference value, carrying out tension control for returning the warp tension to the reference value, according to a control aspect preset by applying the delivering motor 5c and the winding motor 8c as control targets.

Description

  The present invention relates to warp feeding when a loom stops, and more particularly to a technique for maintaining a warp tension in a desired state during a warp feeding operation.

  Generally, a loom during weaving sends out warp yarns with a warp sending device (hereinafter also simply referred to as “feeding device”), and the woven fabric is taken up with a weaving device (hereinafter simply referred to as “winding device”). In some cases, an operation of sending a warp may be performed other than during weaving. Hereinafter, the operation of sending the warp to the delivery device side is also referred to as “reversing” the loom, and the operation of sending the warp to the winding device side is also referred to as “forward rotation” of the loom.

  For example, there is an operation of returning the pre-weaving position (warp) to the delivery device side by about one or two wefts, such as inversion of the weaving of the loom performed at the time of repairing a weft insertion error. In addition to the operation, there is an operation of driving the feeding device and the winding device to feed the warp over several tens of centimeters or several meters (hereinafter, such an operation is referred to as “warp feed (operation)”). It may be done.

  As one of such warp feeding operations, for example, there is a rewinding operation in a loom for weaving a woven fabric having a coarse weft density such as a stale weaving portion in a tire cord fabric. The rewinding operation is an operation in which when a weaving wad unacceptable in quality is found in the woven fabric, the loom is reversed to restore the weaving portion to a pre-weaving position for repair.

  Since the woven fabric having a low weft density is weak in holding the weft by the warp, the weft can be pulled out from the woven fabric portion without performing the opening operation of the warp with the reverse of the loom. Therefore, in the case of a weaving operation of a loom that weaves a fabric with a coarse weft density, after removing the weft yarn up to the weaving portion from the weaving portion in advance, only the feeding device and the winding device are continued in the reverse direction. An operation of driving and sending the warp to the delivery device side, that is, a warp feeding operation is performed. In a normal weaving operation of the loom, the operation of opening the warp yarn by the opening device and removing the weft yarn from the woven fabric portion is performed a plurality of times while reversing the loom.

  In addition, as another warp feeding operation, for example, when the loom is running, there is an operation of continuously driving only the feeding device and the winding device in the normal rotation direction to continuously send the warp to the winding device side. . Thus, the warp feeding operation includes a case where the warp is sent to the feeding device side and a case where the warp is sent to the winding device side.

  As a conventional technique related to a warp feeding operation in a loom, there is one disclosed in Patent Document 1. The prior art relates to the transfer (warp feed operation) of the warp yarn to the weaving device side (winding device side) when the machine (finishing) is applied, and includes a feed motor and a take-up motor independent of the main drive motor of the loom. While driving forward, the warp is transferred and the tension is controlled to transfer the warp with a constant tension. Further, when the warp tension exceeds the set tension during the warp transfer, the feeding motor and the take-up motor are stopped.

  In the above prior art, during the warp feeding operation, the take-up motor is driven at a preset constant rotational speed, and the tension control is performed by the deviation between the detected detected tension of the warp and the set reference tension. This is done by controlling the speed of the feed motor based on (tension deviation). That is, in the prior art, an attempt is made to keep the warp tension constant by controlling only the feeding motor.

  However, in the case of this prior art, the speed of the feed motor is controlled according to the generated tension deviation, so when a large tension deviation occurs temporarily, especially when the detected tension value greatly exceeds the reference tension value. When this occurs, the feed motor is controlled to greatly increase the speed accordingly. Therefore, as a result of the control, the tension decreases and the tension deviation is eliminated. However, since the speed change amount (acceleration quantity) is large when the deviation occurs, the rotational speed of the feed motor is wound after the deviation is eliminated. Control to return to the rotational speed corresponding to the rotational speed of the take-up motor is not in time, and conversely, the warp tension changes in a direction of increasing beyond the reference tension value. As a result, hunting occurs in the control, and time is required until the tension is stabilized at the reference tension value.

Japanese Patent Laid-Open No. 2-269841

  Accordingly, an object of the present invention is to stably perform control for maintaining the tension of the warp in a desired state during the warp feeding operation in which the warp is continuously sent while the loom is stopped. is there.

  Based on the above-mentioned problems, the present invention has a warp feeding method and apparatus in a loom configured as follows. That is, the warp feeding method of the present invention is a loom in which the feeding device and the winding device are driven by the feeding motor and the winding motor independent of the main driving motor of the weaving machine, while the main driving motor is stopped. The warp feeding operation is performed by driving the feeding motor and the winding motor, and the warp tension is detected during the warp feeding operation, and the warp tension value based on the detection is compared with a preset reference value of the warp tension. When the warp tension value deviates from the reference value, the tension control for returning the warp tension to the reference value is executed according to a control mode set in advance with the feeding motor and the winding motor as control targets. To do.

  The “warp tension value (based on detection)” is not limited to the detection value itself, but also includes an average value obtained from the detection value. The “reference value for warp tension” is not limited to a specific value, but includes a range (allowable range) having an upper limit value and a lower limit value.

  In the control mode, when the warp is sent to the delivery device, the delivery motor is decelerated or stopped when the warp tension value exceeds the reference value, and the warp tension value is set to the reference value. When the value is below the value, the winding motor is set to decelerate or stop, and when the warp is sent to the winding device side, when the warp tension value exceeds the reference value, the winding The take-up motor may be decelerated or stopped, and the feeding motor may be set to decelerate or stop when the warp tension value falls below the reference value.

  Further, in the control mode, the deviation between the warp tension value and the reference value is divided by a preset ratio and assigned to the control of the feeding motor and the winding motor, and the deviation assigned to each is eliminated. It may be set to control the driving of the feed motor and the winding motor.

  Further, in the control mode, a permissible threshold value for the deviation between the warp tension value and the reference value is set in advance, and when the deviation is equal to or less than the permissible threshold value, the tension control is performed on one of the feeding motor or the winding motor. When the deviation exceeds the allowable threshold, the tension control may be set to be executed by both the feeding motor and the winding motor.

  The warp feeding device of the present invention is based on a loom having a feeding motor and a winding motor as a driving source, the feeding device and the winding device being independent from the main drive motor of the loom, and can be manually operated by an operator. An operation switch for driving the warp feeding operation by driving the feeding motor and the winding motor when the loom is stopped, and a tension detector for detecting the warp tension during the warp feeding operation And a warp feed control device that controls driving of the feed motor and the take-up motor in accordance with the operation of the operation switch, and the warp feed control device further comprises a reference for warp tension during the warp feed operation. A storage device in which the control mode of the feeding motor and the winding motor during the warp feeding operation is set and stored, the warp tension value based on the detection value by the tension detector, and the reference value And a comparator that outputs a deviation signal including a deviation direction when the warp tension value deviates from the reference value and a deviation occurs, and is set in the storage unit based on the deviation signal from the comparator. And a controller for controlling driving of the feed motor and the take-up motor in accordance with the control mode.

  The “deviation signal” referred to above is not limited to indicating the magnitude (value) of the deviation but may indicate whether or not a deviation has occurred. The “deviation direction” mentioned above indicates whether the deviation is “+” (plus) or “−” (minus). In the present invention, the deviation in the + direction means a deviation when the warp tension value is smaller than the reference value (lower limit of the allowable range), and the deviation in the − direction means that the detected value is the reference value (allowable range). The upper limit value).

  Compared with the conventional warp tension control during the warp feeding operation in which only the feeding motor is controlled based on the tension deviation, the present invention executes the tension control during the warp feeding operation with the feeding motor and the winding motor as control targets. Therefore, when a large tension deviation occurs temporarily, in particular, even when a tension deviation in which the warp tension value is significantly lower than the reference value occurs, the tension can be quickly stabilized.

  Further, if the control mode of the tension is controlled to decelerate or stop the feeding motor or the take-up motor according to the direction of the deviation and the speed increase control is not performed, the warp tension can be easily controlled. Become.

  If the tension deviation to be eliminated is divided into two parts, one deviation is eliminated by controlling the delivery motor, and the other deviation is eliminated by controlling the take-up motor, the speed change of the delivery motor and take-up motor can be reduced. It can be reduced, hunting can be suppressed, and the time until the warp tension converges to the reference tension value can be shortened.

  When the deviation is less than the set threshold value, the tension control is executed by one of the sending motor and the winding motor, and when the deviation exceeds the threshold value, the tension control is executed by both the sending motor and the winding motor. Therefore, for example, when the tension deviation is large, the large deviation can be quickly reduced by first controlling both the sending motor and the winding motor to increase the speed of one motor and decelerating the other. When the deviation is less than the set threshold value, the tension control is switched, and the tension control is executed by only one of the delivery motor and the take-up motor. When the warp tension is converged to the reference tension value, The control and the control of the winding motor can be prevented from affecting each other, and the deviation can be eliminated by stable control.

It is explanatory drawing which shows the outline of the tire cord loom to which this invention is applied. It is explanatory drawing which shows the outline | summary of control of the tire cord loom to which this invention is applied. It is a control block diagram of a tire cord loom to which the present invention is applied. It is a block diagram of the warp feed control device in one embodiment of the present invention.

  With reference to FIG. 1, a loom for weaving a tire cord fabric to which the present invention is applied (hereinafter also referred to as “tire cord loom” or simply “loom”) will be described. The tire cord fabric is a type of woven fabric for rubber reinforcement used for the production of the carcass layer that is the skeleton of a rubber tire.The tire cord fabric includes a weave portion with a very low weft density and a tabby weave portion with a dense weft density. Contains. Further, the suede woven portion is a portion that becomes a main body of the tire cord fabric, whereas the tabby woven portion is formed with a predetermined length in the warp direction before and after the weaving of the suede woven portion. This is a portion for preventing the collapsed weave portion having a coarse weft density from being broken and maintaining the woven form of the tire cord fabric.

  In FIG. 1, the tire cord loom mainly includes a yarn feeding portion 1 for feeding a large number of warps 1a as a horizontal warp row 1b and a weft not shown in the warp row 1b. Thus, a weaving device 2 as a weaving portion to be a woven fabric 2a and a separate winding device 3 as a winding portion for winding the woven fabric 2a are provided independently.

  The yarn supplying portion 1 includes a creel device (not shown) and a tension device 4. In a creel device (not shown), a large number of support members (pegs) are provided in a multi-stage and multi-row shape, and a large number of yarn feeders are arranged in order on these support members. The warp la is pulled out from a large number of yarn feeders on the creel device and led to the tension device 4.

  The tension device 4 aligns a large number of warps 1a pulled out from the creel device in a horizontal row, and a plurality of guides in order to make the tension of the warps 1a pulled out from different yarn feeders substantially uniform. Tension is applied to the warp row 1b by the roller 4a and the dancer roll 4b. The warp string 1b having the uniform tension is supplied to the weaving apparatus 2.

  The weaving apparatus 2 is a portion corresponding to a loom body in a normal loom, and its configuration is basically the same as that of a normal loom. However, in a normal loom, the warp string 1b is wound around a delivery beam mounted on the loom body, and the warp string 1b wound around the delivery beam is rotated to the delivery beam by rotating the delivery beam. In contrast to this, in the illustrated tire cord loom, the warp string 1b supplied from the tension device 4 is fed by the feeding device 5 in the weaving apparatus 2 to supply the warp string 1b to the woven fabric weaving section 7. is doing.

  The weaving apparatus 2 will be described with reference to FIG. The weaving device 2 includes, as main components, a feeding device 5 that sends out the warp row 1b, a tension detector 6 that detects the tension of the warp row 1b (hereinafter also referred to as “warp tension”), and a collar frame of the opening device. 7a, a weft insertion device (not shown), a woven fabric weaving section 7 for weaving the woven fabric 2a including a reed, and a winding device 8 for winding the woven fabric 2a.

  The delivery device 5 includes a nip roll 5a, a delivery roll 5b, and a delivery motor 5c that rotationally drives the delivery roll 5b. The warp row 1b is wound around and sandwiched between the nip roll 5a and the delivery roll 5b, and is sent out to the winding device 8 side by rotating the delivery roll 5b in the normal rotation direction during weaving. The delivery motor 5c is a motor independent of the main drive motor of the loom, and its rotational drive is controlled by the delivery control device 10. The delivery control device 10 adjusts the delivery amount of the warp row 1b, that is, the rotational speed of the delivery motor 5c so that the tension of the warp row 1b becomes a desired tension. Details of the transmission control device 10 will be described later.

  The warp string 1b fed from the feeding device 5 is wound around the tension roll 6b via the guide roll 6a and guided to the woven fabric weaving section 7. A tension detector 6 is connected to the tension roll 6b, and the tension detector 6 detects the tension of the warp string 1b during weaving. In this embodiment, the tension detector 6 also serves as a tension detector as a constituent of the present invention for detecting the warp tension during the warp feeding operation described later. Of course, in addition to the tension detector 6, a dedicated tension detector for detecting the warp tension during the warp feeding operation may be provided.

  In the woven fabric weaving section 7, the warp row 1b is opened by a heel frame 7a, and wefts are woven by a weft insertion device or a cocoon (not shown), and the woven fabric 2a is woven. The woven fabric 2a woven is sent out to the separate winding device 3 side shown in FIG.

  The winding device 8 includes two press rolls 8a, a clothes winding roll 8b against which the press rolls 8a are pressed, and a winding motor 8c that drives the clothing winding roll 8b. The woven fabric 2a woven by the woven fabric weaving section 7 is guided to the winding device 8 side via the guide roll 7b, and is wound around the press roll 8a, the clothing roll 8b, and the press roll 8a in this order. During weaving, the clothing winding roll 8b rotates in the forward rotation direction and is fed to the separate winding device 3 side. The winding motor 8c is a motor independent of the main drive motor of the loom, and the rotational drive thereof is controlled by the winding control device 20. At the time of weaving, the winding control device 20 rotates the winding motor 8c in synchronization with the rotation of the main shaft 9 of the loom with a rotation amount corresponding to the weft density set in the loom control device 30. Details of the winding control device 20 will be described later.

  As shown in FIG. 1, the woven fabric 2 a sent out from the winding device 8 is wound up by the separate winding device 3. The separate winding device 3 includes a driving roller 3a that is driven to rotate, and a rotatable driven roller 3b, and a cloth winding roll 3c around which one end of the woven cloth 2a is wound is placed on these rollers. During weaving, the cloth winding roll 3c is brought into contact with the driving roller 3a and rotated, whereby the woven cloth 2a is wound around the cloth winding roll 3c through the guide roller 3d and the driven roller 3b.

  Next, with reference to FIG. 3, the configurations of the feeding control device 10 and the winding control device 20 and their operations during weaving will be described, and the warp feeding operation when the loom is stopped is also a characteristic part of the present invention. The warp feed control device 40 that operates sometimes will also be described.

  As described above, the delivery control device 10 adjusts the delivery amount of the warp row 1b, that is, the rotational speed of the delivery motor 5c, so that the tension of the warp row 1b becomes a desired tension during weaving. The average tension calculator 13 of the delivery control device 10 receives the signal of the tension value of the warp string 1b detected by the tension detector 6 and the signal of the rotation angle of the main shaft 9 detected by the encoder 9a. The tension calculator 13 samples the tension value at every preset sampling period based on a predetermined rotation angle of the main shaft 9 and the average value of the tension values sampled within a predetermined period (hereinafter referred to as “average tension”). Is calculated). The calculated average tension signal is output to the subtraction terminal of the tension addition point 12.

  A target tension signal set in advance in the target tension setting unit 11 is input to the addition terminal of the tension addition point 12. The tension addition point 12 calculates the tension deviation from the input average tension signal and the target tension signal, and outputs the tension deviation signal to the correction speed calculator 14.

  The corrected speed calculator 14 has proportional, integral and differential control elements, for example, and operates periodically according to a predetermined clock signal, thereby calculating a speed correction value based on the tension deviation and correcting the speed. A value signal is output to the command speed calculator 16. A basic speed signal is also output from the basic speed calculator 15 to the command speed calculator 16.

  The basic speed calculator 15 receives signals from the loom control device 30 regarding the set rotational speed of the loom and the weft density of the woven fabric (both set values). The basic speed calculator 15 receives the signals. The basic speed is calculated from the set rotational speed and the weft density, and a signal of the basic speed is output to the command speed calculator 16.

  The command speed calculator 16 corrects the basic speed obtained from the basic speed calculator 15 with the speed correction value obtained from the corrected speed calculator 14, and adds a correction speed signal obtained by correcting the basic speed to a speed addition point 17. Output to the addition terminal. The switch 19 is for switching the control means of the feed motor 5c between weaving and at the time of warp feeding operation when the loom stops, which will be described later. In FIG. 3, the switch 19 is in a state during weaving.

  A tacho generator 5d for detecting the rotational speed of the feed motor 5c is connected to the subtraction terminal of the speed adding point 17. Based on the output of the tachometer generator 5d, the speed addition point 17 calculates the rotational speed of the delivery motor 5c, and the calculated rotational speed of the delivery motor 5c and the correction speed from the command speed calculator 16 are calculated. The rotational speed deviation is output to the control amplifier 18.

  The control amplifier 18 outputs a drive signal for eliminating the rotational speed deviation to the delivery motor 5c, and increases or decreases the rotational speed of the delivery motor 5c. As previously described, during weaving, the delivery control device 10 compares the warp tension detected by the tension detector 6 with the target tension, calculates a tension deviation, and rotates the delivery motor 5c so as to eliminate the tension deviation. The tension of the warp row 1b is maintained at a desired tension by increasing / decreasing the speed and controlling the feed amount of the warp row 1b.

  On the other hand, the winding control device 20 controls the rotational speed of the winding motor 8 c according to the rotational speed of the main shaft 9. A pulse train signal based on the rotation angle of the main shaft 9 detected by the encoder 9a and a signal relating to the weft density from the loom control device 30 are input to the frequency multiplier 21 of the winding control device 20, and the frequency multiplier 21 converts the pulse rate of the pulse train signal so as to correspond to the input weft density, and calculates the target rotation amount of the winding motor 8c per one rotation of the main shaft 9. The pulse train signal of the calculated target rotation amount is output to the addition terminal of the addition point 25 for the rotation amount. The switch 24 is for switching the control means of the take-up motor 8c between weaving and at the time of warp feeding operation when the loom stops, which will be described later. In FIG. 3, the switch 24 is in a state during weaving.

  A pulse generator 8d for detecting the amount of rotation of the winding motor 8c is connected to the subtraction terminal of the addition point 25 for the amount of rotation via a minute period 23. In the minute period 23, the pulse rate of the pulse train signal of the pulse generator 8d is changed to match the pulse rate of the pulse train signal of the pulse generator 8d with the pulse rate of the pulse train signal of the target rotation amount. The addition point 25 for the rotation amount calculates a rotation amount deviation from the pulse train signal of the target rotation amount and the pulse train signal of the pulse generator 8d, and outputs it to the control amplifier 22.

  The control amplifier 22 outputs a drive signal that eliminates the rotation amount deviation to the winding motor 8c, and increases or decreases the rotational speed of the winding motor 8c. As previously described, during weaving, the winding control device 20 drives the winding motor 8c to rotate in synchronization with the rotation of the main shaft 9 of the loom with a rotation amount corresponding to the weft density set in the loom control device 30. Let

  Now, the warp feed control device 40, which is a characteristic part of the present invention and operates at the time of warp feed operation when the loom stops, has the warp feed device together with the feed device 5, the winding device 8, the operation switches A and B, and the tension detector 6. Is configured. Further, the warp feed control device 40 is connected to the loom control device 30, the feed control device 10, and the winding control device 20.

  The operation switches A and B for executing the warp feeding operation are connected to the loom control device 30. In the illustrated example, the operation switch A is used for continuously feeding the warp row 1b to the feeding device 5 side. The operation switch B functions as a forward warp feeding operation for continuously feeding the warp row 1b to the winding device 8 side. When the operation switch A or B is manually operated by the operator while the loom is stopped, the loom control device 30 outputs an operation command signal for causing the warp feed control device 40 to execute the warp feed operation. .

  Each of the feed control device 10 and the take-up control device 20 is provided with the above-described switches 19 and 24, and the warp feed control device 40 is connected to the feed control device 10 and the winding via the switches 19 and 24. Connected to the control device 20. Each switching device 19, 24 is controlled by the loom control device 30, and is switched to the warp feed control device 40 side when the operation switch A or B is operated.

  The configuration of the warp feed control device 40 will be described with reference to FIG. In the illustrated example, the warp feed control device 40 includes a basic speed generator 41, a storage device 42, a detection controller 43, a comparator 44, and a controller 45.

  The basic speed generator 41 generates a speed command value for rotationally driving the feed motor 5c and the take-up motor 8c at the basic speed when the warp row 1b is fed at a predetermined speed. It is. The speed command value signal is output to the addition points 47 and 48, and the addition point 17 of the sending control device 10 and the addition point 25 of the winding control device 20 are transmitted via the addition points 47 and 48. Is output to the addition terminal.

  In the storage device 42, in addition to the rotational speeds of the sending motor 5c and the winding motor 8c, which are the basis of the speed command value of the basic speed generator 41, the reference value of the warp tension during the warp feeding operation, Control modes of the feed motor 5c and the take-up motor 8c are set. Note that the reference value of the warp tension is set as a range (allowable range) instead of a specific value.

  Further, in this embodiment, as a control mode of the feeding motor 5c and the winding motor 8c during the warp feeding operation, a control mode is set to decelerate one of the feeding motor 5c and the winding motor 8c by a predetermined deceleration amount. Shall be. More specifically, in the case of sending the warp to the delivery device 5 side (during reverse warp feed), if the warp tension value exceeds the reference value, the rotational speed of the feed motor 5c is reduced by a predetermined amount, and the warp tension is increased. When the value falls below the reference value, the rotational speed of the winding motor 8c is set to be reduced by a predetermined amount. Further, when the warp is sent to the winding device 8 side (at the time of forward warp feeding), when the warp tension value exceeds the reference value, the rotational speed of the winding motor 8c is reduced by a predetermined amount, and the warp is drawn. When the tension value falls below the reference value, the rotational speed of the delivery motor 5c is set to be reduced by a predetermined amount. A motor that is not subject to deceleration is driven at a constant basic speed. It is assumed that the predetermined deceleration amount used for the deceleration control is set in the storage unit 42 together with the control mode.

  The detection controller 43 is connected to the tension detector 6, and a detection signal corresponding to the detected value of the warp tension is input from the tension detector 6. Further, a clock signal generator 46 is connected to the detection controller 43, and a clock pulse signal having a constant frequency is input from the clock signal generator 46. The detection controller 43 counts the clock pulses, and outputs the detected value from the tension detector 6 at that time as a warp tension value to the comparator 44 for each preset count value (for each sampling period).

  The warp tension value detected by the tension detector 6 and output to the comparator 44 is not limited to the detection value itself detected for each sampling period as described above, but a plurality of detected values detected during the sampling period. The average value may be used. In that case, it is assumed that a detection period shorter than the sampling period (for example, each time the clock pulse is generated) is set, and a plurality of detection values are obtained during the sampling period. The detection controller 43 may be provided with a function for averaging the detection values. The sampling period and the detection period may be set by the main shaft rotation angle of the loom.

  The comparator 44 is connected to the storage device 42 and the detection controller 43, and a warp tension reference value signal is input from the storage device 42, and a warp tension value signal is input from the detection controller 43. Then, the comparator 44 compares the inputted warp tension value with the reference value, and indicates the occurrence of deviation when the warp tension value deviates from the reference value (allowable range) (when deviation occurs). A deviation signal (including information on the direction of deviation) is output to the controller 45. Specifically, when the warp tension value is smaller than the lower limit value of the reference value (allowable range), a deviation signal indicating that a deviation in the + direction has occurred is output to the controller 45. When the detected value is larger than the upper limit value of the reference value (allowable range), a deviation signal indicating that a minus direction deviation has occurred is output to the controller 45.

  The controller 45 is connected to the comparator 44, and the deviation signal is input from the comparator 44. When the deviation signal is input, the controller 45 sends a correction speed signal corresponding to the deceleration amount set in the storage device 42 on the downstream side of the basic speed generator 41 in accordance with the control mode described above. The data is output to the subtraction terminals of the addition points 47 and 48 on the device 10 side or the winding control device 20 side.

  Next, the operation of the warp feed control device 40 will be described. In the following description, a case where a rewinding operation, that is, a reverse warp feeding operation is performed will be described. As described above, the wrinkle returning operation is an operation for returning a weaving portion to a pre-weaving position for repair when a weaving wad unacceptable in quality is found in the woven fabric. In the case of forward warp feeding operation, the relationship between the direction of deviation and the motor to be controlled is reversed.

  During the weaving of the tire cord fabric, when an unacceptable weave or the like is found in the woven portion of the woven fabric, the operator operates the stop button (not shown) of the loom to stop the loom.

  Next, a rewinding operation is performed in order to start the weaving again from the position where the weaving occurs. In the case of the woven portion of the tire cord fabric, the weft density is very coarse, so that the weft yarn can be pulled out from the warp row without opening the warp yarn as in a normal fabric. Therefore, in the rewinding operation of the tire cord loom, first, all the wefts up to the portion where the weaving or the like is generated are removed from the warp row, and then the operation switch A shown in FIG. To operate.

  When the operation switch A is turned on, the control unit of the delivery motor 5c is switched from the command speed calculator 16 or the like to the warp feed control device 40 by the switch 19. Similarly, the control subject of the winding motor 8c is switched from the double cycle 21 or the like to the warp feed control device 40. The warp feeding control device 40 starts reverse rotation driving of the feeding motor 5c and the winding motor 8c at the basic speed, and the feeding motor 5c and the winding motor 8c are the feeding roll 5b and the winding device of the feeding device 5 shown in FIG. Eight clothes winding rolls 8b are driven in reverse to start warp feeding operation in which the warp string 1b is continuously fed to the delivery device 5 side.

  Even during the warp feeding operation, the warp tension is detected by the tension detector 6 as in the weaving operation. The detection controller 43 of the warp feed control device 40 samples the detection signal indicating the detection value of the tension detector 6 for each preset count value (sampling cycle), and compares the sampled detection value as the warp tension value. Output to the device 44.

  The comparator 44 to which the warp tension value is input from the detection controller 43 compares the input warp tension value with the reference value (allowable range) of the warp tension set in the storage unit 42. As a result of the comparison, when a deviation occurs when the warp tension value deviates from the allowable range indicated as the reference value, a deviation signal indicating the direction of the deviation is output to the controller 45. Specifically, when the warp tension value is smaller than the lower limit value of the reference value (allowable range), a deviation signal indicating that a deviation in the + direction has occurred is output to the controller 45. When the detected value is larger than the upper limit value of the reference value (allowable range), a deviation signal indicating that a minus direction deviation has occurred is output to the controller 45.

  When the controller 45 receives the deviation signal in the + direction or the − direction from the comparator 44, the controller 45 corrects to reduce the speed with respect to the addition points 48 and 47 on the winding control device 20 side or the sending control device 10 side. Output speed signal. Specifically, it is as follows.

  When the deviation signal from the comparator 44 indicates a deviation in the + direction, that is, when the actual tension becomes low and the warp tension value becomes smaller than the lower limit value of the reference value (allowable range), the winding is performed. A correction speed signal corresponding to the deceleration amount set in the storage device 42 is output to the addition point 48 on the control device 20 side. As a result, the speed command value from the basic speed generator 41 is corrected by the correction speed signal, and the rotation speed of the winding motor 8c that has been driven to rotate at the basic speed is reduced by the deceleration amount. As a result, the amount of warp fed by the winding device 8 (= the amount of warp fed by the dressing roll 8b per unit time) decreases and the warp tension tends to increase, and the deviation is eliminated.

  On the other hand, when the deviation signal from the comparator 44 indicates a deviation in the negative direction, that is, when the actual tension becomes higher and the warp tension value becomes larger than the upper limit value of the reference value (allowable range), A correction speed signal corresponding to the deceleration amount set in the storage device 42 is output to the addition point 47 on the delivery control device 10 side. As a result, the delivery motor 5c that has been rotationally driven at the basic speed is decelerated by the deceleration amount. As a result, the amount of warp taken up by the delivery device 5 (= the amount of warp fed by the delivery roll 5b per unit time) decreases and the warp tension tends to decrease, and the deviation is eliminated.

  The comparator 44 performs the above-described comparison operation every time the warp tension value is input from the detection controller 43, and stops the output of the deviation signal when the deviation is eliminated as a result of the control. As a result, the controller 45 stops outputting the correction speed signal, and both the feed motor 5c and the take-up motor 8c are again driven to rotate at the basic speed. If the deviation is still not eliminated as a result of the comparison operation, the comparator 44 continues to output the deviation signal, thereby decelerating the feed motor 5c or the take-up motor 8c according to the set control mode. Control, that is, control that is driven in a state where the rotational speed of the feed motor 5c or the take-up motor 8c is decelerated by a predetermined deceleration amount is continued.

  In the control mode, one of the feed motor 5c and the take-up motor 8c is decelerated by a predetermined deceleration amount according to the direction of deviation. However, in this control mode, instead of the deceleration, the feed motor 5c or The winding motor 8c may be stopped. In that case, setting of the deceleration amount with respect to the storage device 42 becomes unnecessary.

  Moreover, in the said control aspect, it is good also as what changes a deceleration amount according to the magnitude | size of deviation instead of what decelerates only by predetermined deceleration amount. In this case, the deviation signal also includes information on the magnitude of the deviation, and a plurality of deceleration amounts corresponding to the magnitude of deviation (size range) are set in the storage device 42, and the controller 45 The deceleration amount may be selected based on the deviation signal output from the comparator 44.

  Furthermore, the present invention is not limited to performing only one of the deceleration control and the stop control, and it is also possible to perform control so as to switch between deceleration and stop according to the magnitude of the deviation. In that case, an allowable value of deviation for which deceleration control is performed is set in the storage device 42. If the magnitude of the deviation is equal to or smaller than the allowable value, the deceleration control is performed, and the magnitude of the deviation indicates the allowable value. What is necessary is just to set it as the control aspect which performs the said stop control when exceeding. In this case, the deceleration control may be the one that decelerates by the predetermined deceleration amount, or the deceleration amount that changes according to the magnitude of the deviation.

  The preferred embodiment of the present invention has been described above. However, the control mode used in the warp feeding method of the present invention is not limited to that of the above-described embodiment, and the control mode described in the following modifications 1 and 2 also includes the present invention. It is also possible to implement.

[Modification 1]
In the above embodiment, the driving of one of the feeding motor 5c and the winding motor 8c is controlled based on the direction of warp feeding and the direction of deviation, but instead of this, a control mode for eliminating the deviation It is conceivable that the driving of the delivery motor 5c and the winding motor 8c are controlled simultaneously. Specifically, when a warp tension deviation occurs, the deviation signal output from the comparator 44 to the controller 45 includes not only the deviation direction but also information on the magnitude of the deviation. In order to eliminate the deviation by only controlling one of the sending motor 5c and the take-up motor 8c, a certain percentage of the generated deviation is calculated in cooperation with the control of both motors. The control is performed to eliminate the remainder, and the remainder is controlled by controlling the winding motor 8c.

  For example, if the ratio is set to 50% on the sending side and 50% on the winding side, the sending control device 10 controls the sending motor 5c so as to eliminate the deviation of D / 2 in order to eliminate the generated deviation D. And the winding control device 20 controls the winding motor 8c so as to eliminate the deviation of D / 2. In this case, the controller 45 in the warp feed control device 40 calculates a speed correction amount that eliminates each deviation, and adds the corrected speed signal to each of the sending control device 10 side and the winding control device 20 side. Output to matching points 47 and 48.

[Modification 2]
As another modified example, an allowable threshold value of deviation is set in the storage device 42 in advance, and if the deviation is smaller than the allowable threshold value, the deviation of the deviation is controlled by one of the feeding motor 5c and the winding motor 8c. If the deviation is large and the deviation exceeds a permissible threshold, the control of the first modification (tension control by controlling both the feed motor 5c and the take-up motor 8c) is executed. Good. In this case, the storage device 42 in the warp feed control device 40 is set with an allowable threshold value, and the control target when the deviation is equal to or less than the allowable threshold value is controlled by either the sending device 10 side or the winding device 20 side. It is set whether or not.

  In this case, when the deviation is equal to or smaller than the allowable threshold value, the control mode of the above-described embodiment is executed, and when the deviation exceeds the allowable threshold value, the control mode of the first modification example is used. Good. Further, as a control when the deviation exceeds the allowable threshold, instead of the control of the first modification, for example, one of the feeding motor 5c and the take-up motor 8c is increased by a predetermined amount according to the deviation direction or You may make it drive-control based on the warp tension which decelerated and detected the other motor.

  The present invention is not limited to the rewinding operation of the tire cord loom shown in the present embodiment, and the weft density of the woven fabric to be woven is coarse and the weft can be removed from the woven fabric without opening the warp ( For example, the present invention can also be applied to a rewinding operation in a loom for weaving gum tape base fabric, gauze and the like. Further, the present invention can also be applied to a warp feeding operation performed when the machine is hooked (in this case, the feeding motor and the winding motor are driven to rotate forward).

DESCRIPTION OF SYMBOLS 1 Yarn supply part 1a Warp 1b Warp string 2 Weaving apparatus (weaving part)
2a Woven fabric 3 Separate winding device (winding part)
3a driving roller 3b driven roller 3c cloth winding roll 3d guide roller 4 tension device 4a guide roller 4b dancer roll 5 sending device 5a nip roll 5b sending roll 5c sending motor 5d tachometer 6 tension detector 6a guide roll 6b tension roll 7 weaving section 7a Lash frame 7b Guide roll 8 Winding device 8a Press roll 8b Clothing roll 8c Winding motor 8d Pulse generator 9 Spindle 9a Encoder 10 Feed control device 11 Target tension setting device 12 Tension point 13 Average tension calculator 14 Correction Speed calculator 15 Basic speed calculator 16 Command speed calculator 17 Addition point 18 Control amplifier 19 Switch 20 Winding control device 21 Doubler 22 Control amplifier 23 Divider 24 Switcher 25 Addition point 30 Loom control device 40 Warp feed controller Device 41 Basic speed generator 42 Memory 43 Detection controller 44 Comparator 45 Controller 46 Clock signal generator 47 Addition point 48 Addition point A Operation switch B Operation switch

Claims (5)

In the loom using the feeding motor (5c) and the winding motor (8c) as driving sources, the feeding device (5) and the winding device (8) are independent of the main drive motor of the loom,
While the main drive motor is stopped, the feeding motor (5c) and the winding motor (8c) are driven to perform the warp feeding operation, and the warp tension is detected during the warp feeding operation. The warp tension value based on this is compared with a preset reference value of warp tension, and when the warp tension value deviates from the reference value, the feeding motor (5c) and the winding motor (8c) are controlled in advance. A warp feeding method in a loom, wherein tension control for returning the warp tension to the reference value is executed according to a set control mode.   In the control mode, when the warp is sent to the delivery device (5) side, when the warp tension value exceeds the reference value, the delivery motor (5c) is decelerated or stopped, and the warp tension is When the value falls below the reference value, the winding motor (8c) is set to decelerate or stop, and when the warp is sent to the winding device (8), the warp tension value is When the reference value is exceeded, the winding motor (8c) is decelerated or stopped, and when the warp tension value falls below the reference value, the feeding motor (5c) is set to decelerate or stop. The warp feeding method in the loom according to claim 1.   In the control mode, the deviation between the warp tension value and the reference value is divided by a preset ratio and assigned to the control of the feeding motor (5c) and the winding motor (8c), and the deviation assigned to each The warp feeding method in the loom according to claim 1 or 2, wherein the driving of the feeding motor (5c) and the winding motor (8c) is controlled so as to eliminate the problem.   In the control mode, a permissible threshold value of the deviation between the warp tension value and the reference value is set in advance, and when the deviation is equal to or less than the permissible threshold value, one of the feeding motor (5c) and the winding motor (8c) The tension control is executed in step (b), and when the deviation exceeds the allowable threshold, the tension control is executed by both the feeding motor (5c) and the winding motor (8c). A warp feeding method in a loom according to claim 2 or claim 3. In the loom using the feeding motor (5c) and the winding motor (8c) as driving sources, the feeding device (5) and the winding device (8) are independent of the main drive motor of the loom,
An operation switch (A, B) that can be manually operated by an operator for driving the feeding motor (5c) and the winding motor (8c) while the loom is stopped to execute a warp feeding operation. An operation switch (A, B), a tension detector (6) that detects the tension of the warp during the warp feeding operation, and the operation of the operation switch (A, B), the feeding motor (5c) and the A warp feed control device (40) for controlling the drive of the winding motor (8c),
Further, the warp feed control device (40) is set with a reference value of the warp tension during the warp feed operation and control modes of the feed motor (5c) and the take-up motor (8c) during the warp feed operation. The stored memory (42) and the warp tension value based on the value detected by the tension detector (6) were compared with the reference value, and the warp tension value deviated from the reference value, resulting in a deviation. A comparator (44) that outputs a deviation signal including a deviation direction, and the delivery motor (44) according to the control mode set in the memory (42) based on the deviation signal from the comparator (44). 5c) and a controller (45) for controlling the driving of the winding motor (8c).

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