KR20040082276A - Filling Bar Preventing Method and Apparatus - Google Patents

Abstract

PURPOSE: A weft bar preventing method and a device of a weaving machine are provided, thereby regulating a position before weaving and value of warp tension precisely. CONSTITUTION: A weft bar preventing method of a weaving machine comprises the steps of: (correcting operation of a position before weaving) rotating a clothes winding roll(28) to shift the position before weaving to a proper position; and (warp tension regulating operation) rotating a delivery beam to regulate warp tension to proper value. A weft bar preventing device comprises: a correcting device of the position before weaving rotating the clothes winding roll(28) to shift the position before weaving to the proper position; a warp tension regulating device rotating the delivery beam to regulate the warp tension to the proper value; and a main control device beginning common operation of the weaving machine after work preparing operation of the correcting device of the position before weaving and the warp tension regulating device.

Description

Filling Bar Preventing Method and Apparatus

Field of invention

The present invention relates to a method and an apparatus for preventing the weaving of a loom in which a correcting operation of a position immediately before and a setting operation of an inclination tension are performed before the operation of the loom.

Background of the Invention

In the loom, before the start of normal operation (normal operation), the lottery roll is rotated in the opposite direction to the rotation direction of the normal lottery roll (winding roll) by a value set in advance, and the immediately preceding position is rearward in the traveling direction of the inclination. After moving to (downstream) and rotating the delivery beam in the direction of rotation of the normal lottery roll by a predetermined value, finely adjusting the delivery side tilt tension, the loom which resumes normal operation is resumed. Known methods for preventing stomach are known (see, for example, Japanese Patent No. 2619863).

In general, when a cause of stoppage occurs, the loom waits (stops), and when the cause of recovery stops, the loom is restarted. The stop occurs due to many causes, and in addition, the time required for recovery may vary depending on the delay of arrival of the worker or the cause of the stop, and the time that the loom is stopped is not always the same.

For example, since the inclination increases due to the tension applied to the inclination and the weight of the inclination, the inclination tension decreases as the stopping time of the loom becomes longer. For this reason, in the loom in which the warp tension adjustment operation of adjusting the tension of the warp is performed at the time of the operation of the loom, the time required for the operation changes in accordance with the fluctuation state of the warp tension during stop.

Further, the operation preparation operation performed when starting the operation of the loom includes a previous position correcting operation of moving the entire inclination by rotating the delivery beam and the guide roller subsequent thereto, and correcting the position immediately before the body stroke position. do. When the immediately preceding position is corrected by the execution of the immediately preceding position correcting operation, the inclination tension changes.

As described above, the period required for the tension adjusting operation is generally influenced by the amount of change of the inclination tension (lowering amount) during the loom stop or the amount of correction of the immediately preceding position.

However, according to the studies of the inventors, it was confirmed that the degree of influence on the inclination tension of the immediately preceding position and the immediately preceding peripheral portion was different from that of the driven member such as the lottery roll and the sending beam. As a result, when the tension adjusting operation is completed before the last position correcting operation is completed, the gradient tension value (actual value) set by the tension adjusting operation is changed by the last position correcting operation.

In addition, the immediately preceding position correcting operation is completed in a substantially constant period. However, since the tension adjusting operation fluctuates in accordance with the fluctuation state of the inclined tension during stop, the end timing of the tension adjusting operation is before and after the end timing of the previous position correcting operation. As a result, the final inclination force (at the time of starting operation and the first body stroke) becomes uneven, and largely deviates from the desired tension value, resulting in anomalies.

Therefore, it is not always possible to prevent the step by simply performing the last position correction operation or the inclination tension adjustment operation, and there is a problem in terms of reliability.

Specifically, there is little intervening between the arrangement position of a lottery roll and the immediately before, and the space | interval between a lottery roll and a previous one is short. In addition, the amount of stretching of the fabric from the lottery roll to just before is smaller than the amount of stretching of the warp from immediately before to the delivery beam. Therefore, since the rotation of the lottery roll is transmitted to the fabric itself, the influence of the last position correction due to the rotation of the lottery roll is large, and the forward movement and the backward movement of the immediately preceding position can be accurately performed by the lottery roll.

Since the rotational force of the lottery roll is in contact with mechanical parts such as a heald, a body, and a dropper, it is difficult to accurately transmit the rotational force to the inclination due to the friction generated between the mechanical parts and the inclination. Therefore, the lottery roll is unsuitable for adjusting the inclination of the tension as compared with the delivery beam as described later.

Since the rotational force of the delivery beam directly winding the inclination is transmitted to the inclination reliably, the relationship between the rotational force of the delivery beam and the inclination tension is clear, and the delivery beam is a member suitable for tension adjustment.

However, mechanical parts such as heald, body, heald, dropper, and the like exist from the sending beam to the immediately preceding position, and the presence of these causes friction between the warp and the warp. For this reason, even if the inclination is shifted by rotating the delivery beam, it is difficult to be transmitted immediately before the friction due to the body or the like, and it becomes uneven at the position immediately after the correction operation by the delivery beam. Therefore, with regard to the adjustment of the immediately preceding position, the delivery beam is not suitable as compared with the lottery roll.

Therefore, it is understood that for fabrics in which it is necessary to precisely adjust the last position and the inclination tension together to prevent tipping, it is better to share the last position correction operation on the lottery roll and the inclination tension adjustment operation on the delivery beam. In addition, as described above, it is considered that the end of the tension adjustment operation after the immediately preceding position correction operation is most effective for the occurrence of the above stage.

An object of the present invention is to reliably prevent an upper end by precisely adjusting a value of an actual immediately preceding position or an inclined tension in a loom which performs a correcting operation of an immediately preceding position or an adjustment operation of an inclined tension prior to the normal operation of the loom.

The above and other objects of the present invention can be achieved by the present invention described below. Hereinafter, the content of the present invention will be described in detail.

1 is a schematic view of a weaving machine equipped with a gas stop prevention device according to the present invention.

FIG. 2 is a block diagram showing an embodiment of the winding control device constituting a part of the above-described prevention device shown in FIG.

3 is a block diagram showing an embodiment of a delivery control device constituting a part of the above-described prevention device shown in FIG.

4 is a time chart for explaining the operation of the above-described prevention apparatus shown in FIG.

5 is a block diagram showing a modification of the above-described prevention apparatus according to the present invention.

FIG. 6 is a graph showing output over time for explaining the operation of the speed compensator of the above-described prevention device shown in FIG.

7 is a block diagram showing another modified example of the above-described prevention apparatus according to the present invention.

Explanation of the main symbols in the drawings

I, II: feedback circuit S0: push signal

S1: Wound diameter signal S2: Transmission speed signal

S3: tension signal S4: spindle rotation angle signal

S5: Roll rotation angle signal S6: Operation signal

S7: Operation ready signal S8: Operation delay time signal

S9: Control start command signal S10: Basic speed signal

S11: Immediately before position control signal S12: Winding target value signal

S13: winding drive signal S14: speed signal

S15: Correction speed signal S16: Speed signal during normal operation

S17: Speed signal during operation S18: Speed signal

S19: Correction signal S20: Speed command value signal

S21: gain signal

t1: time (period) from the start of the last position correction operation to the start of the gradient tension adjustment operation

t2: Last position correction operation time (period)

t3: Gradient tension adjustment operation time (period)

t4: Time (period) in which the previous position correction operation and the gradient tension adjustment operation overlap

10: loom 12: warp

14: delivery beam 16: back roller

18: harness frame 20: reed

22: Immediately 24: Fabric

26: guide roller 28: lottery roll

30: press roll 32: wound beam

34: delivery motor 36, 56: gear mechanism

38: Diameter sensor 40: Transmission control device

42: taco generating device 44: gradient tension sensor

46: spindle 48, 50: motion conversion mechanism

52: weft 54: winding motor

58, 60: encoder 62: winding control device

64: winding torque adjusting mechanism 66: synchronous control unit

68: Immediate Position Control 70: Main Controller

72: operation button 74: switcher

76: drive amount signal generator 78: command generator

80: setting device 82: previous position correction amount setting device

84: basic rotation signal generator 86: adder

88: forward and backward counter 90, 114: driver

94: controller during operation 96: controller

98: control unit in operation 100: controller

102: basic speed signal generator 104: adder

106, 108: tension setter 110: diameter corrector

112: subtractor 116: speed compensator

The above step prevention method according to the present invention, the operation preparation includes a previous position correction operation for rotating the lottery roll to move the previous position to a predetermined position, and the gradient tension adjustment operation for rotating the delivery beam to adjust the tilt tension to a predetermined value. After the operation is finished, the present invention relates to a method for preventing a run of the loom normally. Such an end prevention method includes terminating the tilt tension adjusting operation after terminating the immediately preceding position correcting operation to end the operation preparation operation.

The above-mentioned prevention device according to the present invention includes a position corrector for rotating the lottery roll to move the position immediately before the predetermined position, an inclination tension adjuster for rotating the delivery beam to adjust the tilt tension to a predetermined value, and the position corrector immediately before. And a main controller for starting normal operation of the loom after the operation preparation operation of the inclination tension regulator is finished. The main controller finishes the operation preparation operation by terminating the gradient tension adjusting operation after terminating the immediately preceding position correcting operation.

The end of each of the immediately preceding position correcting operation and the gradient tension adjusting operation referred to here corresponds specifically to the completion of each predetermined operation, and the end of the operation is forcibly stopped due to an abnormality occurring during each operation. It doesn't work.

According to the present invention, after the last position is precisely adjusted by the last position correcting operation by the lottery roll, the inclined tension is adjusted to a predetermined value by the tilting tension adjusting operation by the sending beam to finish the operation preparation operation. The loom is normally operated. For this reason, both the position immediately before and the inclination tension which most influence the generation | occurrence | production of an upper stage can be adjusted correctly to a desired state.

As a result of the above, as in the prior art, for example, due to the change of the inclination tension during loom stop, the operation end time of the lottery roll is later than the operation end time of the delivery beam, and the position adjustment operation just before the inclination tension adjustment operation ends. By doing this, the final inclination tension immediately before the operation is set to a value which is greatly out of the desired tension value, so that inadequateity in which an upper stage occurs does not occur.

In addition, the above step prevention method may include starting the inclination tension adjusting operation after starting the immediately preceding position correction operation.

In addition, the above step prevention method may include starting the inclination tension adjustment operation after the last position correction operation ends.

In addition, the above-described step preventing method estimates each operation time of the immediately preceding position correcting operation and the tilt tension adjusting operation, and calculates the time difference between the start time of the preceding position correcting operation and the tilt tension adjusting operation based on each operating time. And determining the start time of the gradient tension adjusting operation based on the time difference.

The above step prevention method is selected according to an element in which the inclination of the inclination tension occurs from one value or a predetermined value between a time for starting the immediately preceding position correction operation and a time for starting the inclination tension adjustment operation. It may be a value.

Embodiment of the invention

Referring to FIG. 1, the warp yarn 12 in the loom 10 is immediately preceding the back beam 16, the plurality of heald frames 18, and the body 20 in the outgoing beam 14 in which the warp yarn is wound. (22). The woven fabric 24 reaches the lottery roll 28 as a take-up roll with the guide roller 26 interposed therebetween, and the lottery roll 28 and a pair of press rolls 30 at the front side 22. ) Is sent out to the winding beam 32 and wound around the winding beam 32.

The delivery beam 14 is rotated by the delivery motor 34 with a gear mechanism 36 constituted by a reduction mechanism such as a cog wheel interposed therebetween to send out the plurality of inclinations 12 in the form of a sheet. The amount of the inclination 12 wound around the delivery beam 14 decreases gradually with the transmission of the inclination 12 from the delivery beam 14. For this reason, the diameter of the delivery beam 14 is detected by the diameter sensor 38, and the detected diameter signal S1 is supplied to the delivery control apparatus 40. FIG. The rotation speed of the output shaft of the delivery motor 34 is detected by the taco generating device 42, and the detected delivery rotation speed signal S2 is supplied to the delivery control device 40.

The tension value (actual value) acting on the inclination 12 is detected by the inclination tension sensor 44 which detects the load acting on the back roller 16. The detected tension signal S3 is supplied to the delivery control device 40 as a thread tension actually acting on the inclination 12.

Each heald frame 18 is reciprocated up and down by the motion conversion mechanism 48 which receives the rotational movement of the main shaft 46 rotated by the main shaft motor (not shown), and opens the inclination 12 up and down. .

The body 20 is swung by the motion conversion mechanism 50 which receives the rotational movement of the main shaft 46, and puts the weft yarn 52 inserted in the opening of the inclination 12 in the immediately preceding 22.

The lottery roll 28 is rotated by a gear mechanism 56 composed of a deceleration mechanism such as a cog wheel that receives the rotational movement of the winding motor 54 to wind the fabric 24 together with the press roll 30. Export to).

The rotation angles of the main shaft 46 and the winding motor 54 are detected by the encoders 58 and 60, respectively. The detected main shaft rotation angle signal S4 and the roll rotation angle signal S5 are supplied to the winding control device 62. The main shaft rotation angle signal S4 is also supplied to the delivery control device 40.

The winding beam 32 is a winding torque adjusting mechanism 64 subjected to rotational movement of the spindle 46 so that the turning speed of the fabric 24 wound around the wrapping beam 32 is slightly faster than the speed at which the fabric 24 is sent. It rotates with a slip bearing (not shown) by it, and rotates to make the winding tension value of the cloth 24 constant.

With reference to Figs. 2 and 3, the winding control device 62 and the delivery control device 40, which act as one component of the breaking prevention device of the loom 10, will be explained. Will be described.

As shown in Fig. 2, the winding control device 62 includes a synchronous control unit 66 for controlling the rotation amount of the winding motor 54 when the loom 10 is in normal operation (normal operation). And a front position control section 68 for controlling the rotational amount of the winding motor 54 to correct the position of the front side 22 in the moving direction of the inclination 12 when the loom 10 is prepared for operation.

The push signal S0 when the operator presses the operation button 72 of the loom 10 at which the operator has stopped is input to the main controller 70. The main control unit 70 inputs the push signal S0 to output the operation preparation signal S7 to the drive amount signal generator 76 and the command generator 78, and thus the output control device 40 and the winding control device ( The operation preparation operation 62 is executed, and after the operation preparation operation is completed, the operation signal S6 is output to the switch 74 of the transmission control device 40 shown in FIG.

Various data used for calculating the basic speed of the winding motor 54 including the body stroke density and the amount of correction of the immediately preceding position at the time of the operation preparation operation are set in advance in the position correction amount setter 82 in advance.

The drive amount signal generator 76 receives the operation preparation signal S7, thereby performing the immediately preceding position correction operation for a period of time t2 shown in Fig. 4D. In the last position correcting operation, the drive amount signal generator 76 converts the amount of drive (rotation amount) of the winding motor 54 into a previous position control signal in pulse form on the basis of the amount of correction set in the last position corrected amount setter 82. ) Is supplied to one input terminal of the adder 86 of the synchronization controller 66.

The synchronization control unit 66 calculates the basic speed of the winding motor 54 based on the body stroke density and the main shaft rotation angle signal S4 set in the immediately preceding position correction amount setter 82, and the winding motor 54. It has a basic amount of rotation signal generator (84) for driving.

The basic rotational amount signal generator 84 rotates the take-up motor 54 at a speed corresponding to the basic rotational speed of the main shaft 46 during the normal operation of the loom 10, thereby causing the main shaft 46 of the loom 10 to rotate. The amount of rotation corresponding to the amount of rotation can be rotated.

Specifically, the basic rotation amount signal generator 84 receives the main shaft rotation angle signal S4 during normal operation of the loom 10 and based on various data such as the main shaft rotation angle signal S4 and the body stroke density received. , The basic rotation amount signal S10 in pulse form corresponding to the basic speed of the winding motor 54 is supplied to the other input terminal of the adder 86.

The adder 86 inputs together with the immediately preceding position control signal S11 on the pulse input to one input terminal and the basic rotation amount signal S10 on the pulse input to the other terminal. The adder 86 outputs the pulsed phase signals from the two input terminals as the winding target value signal S12 to the addition terminal of the normal and reverse counter 88.

In the operation preparation period, since the loom 10 is not normally operated, that is, the main shaft 46 is not rotating, the basic rotation amount signal generator 84 adds the basic rotation amount signal S10 in pulse form. It does not output to the part 86. For this reason, the pulse-shaped winding target value signal S12 output from the adder 86 to the normal and reverse counter 88 becomes only the signal from the drive amount signal generator 76, that is, the last position control signal S11.

The stationary counter 88 calculates the last position control signal S11 inputted from the adder 86 and transmits the calculated value to the pulse rotational rotation angle supplied from the encoder 60 connected to the output shaft of the winding motor 54. Subtract with the signal S5. The calculated value of the stationary counter 88 is supplied to the driver 90 as the winding drive signal S13.

The driver 90 is an amplifying circuit for amplifying an input signal to rotate the winding motor 54. If the winding driving signal S13 from the stationary counter 88 is positive, the driver 90 is rotated forward and negative. The reverse winding motor 54 is rotated in reverse. As a result, the position immediately before the inclination 12 is moved to a desired position.

In the illustrated example, the stationary counter 88 winds up the winding drive signal S13 having a value proportional to the difference between the winding target value signal S12 and the roll rotation angle signal S5 with the driver 90 interposed therebetween. Since the motor 54 is supplied to the motor 54, the stationary counter 88 and the driver 90 together with the encoder 60 form a direct feedback circuit I including only a proportional element for the winding motor 54. . Therefore, even if a difference occurs between the winding target value signal S12 and the roll rotation angle signal S5, the winding motor 54 is driven to eliminate the difference.

For example, the winding motor 54 is a servo motor, and the feedback circuit I is comprised by the well-known circuit which controls this.

When the command generator 78 inputs the operation preparation signal S7 to this, the time t1 shown in Fig. 4E has elapsed based on the operation delay time signal S8 set in the setter 80. After the operation, the control start command signal S9 is outputted to the switch 74 shown in FIG.

As shown in FIG. 3, the transmission control device 40 controls the tension signal S3 output from the gradient tension sensor 44 when the controller 96 of the control unit 94 operates and the controller of the control unit 98 operates. 100). In operation, the controller 94 includes a basic speed signal generator 102 to which a body stroke density signal or a main shaft rotation angle signal S4 of the main shaft 46 is input.

The basic speed signal generator 102 is configured in the same manner as the basic rotational amount signal generator 84 of the winding control device 62 and acts the same, and the speed signal S14 corresponding to the basic speed is added to the addition unit 104. Output to one input terminal. The controllers 96 and 100 are receiving the tension setting values T1 and T2 set in the tension setters 106 and 108, respectively.

The controller 96 calculates the difference between the mounting force detected by the gradient tension sensor 44 and the tension setting value (tension target value) set in the tension setter 106, and corrects the obtained tension difference by a PID controller or the like. The correction speed signal S15 corresponding to the rotation speed to be converted is converted, and the converted correction speed signal S15 is output to the other input terminal of the adder 104.

The adder 104 adds the speed signal S14 and the correction speed signal S15 to output the normal operation speed signal S16 to the switcher 74.

The controller 100 obtains the difference between the mounting force detected by the gradient tension sensor 44 and the tension setting value set in the tension setter 108, and outputs the obtained tension difference according to the tension difference from the gain controller. It converts into the time velocity signal S17, and outputs the converted operation | movement speed signal S17 to the other input terminal of the switch 74.

The switcher 74 selectively switches the input normal operation speed signal S16 or operation speed signal S17 on the basis of the input of the operation signal S6 or the operation control start command signal S9, The selected signal S16 or S17 is output as the speed signal S18 to the diameter corrector 110.

When the time t1 elapses after the operation button 72 is pressed, the command generator 78 outputs the control start command signal S9 during operation to the switcher 74 (see Fig. 4C). The switch 74 is inputted with the control start command signal S9 during operation to put the control unit 98 in a selected state during operation and uses the speed signal S17 as the speed signal S18 to the diameter corrector 110 during operation. Output

In both the operation and the normal operation, the value of the speed signal S18 selected by the switch 74 corresponds to the speed of the inclination 12 to be emitted from the transmission beam 14. However, since the inclined winding diameter of the sending beam 14 decreases gradually with the sending of the inclination 12, in order to keep the inclined sending amount from the sending beam 14 constant, the rotational speed of the sending beam 14 is adjusted to the winding diameter. It needs to be corrected accordingly. Therefore, the speed signal S18 from the switcher 74 is corrected based on the diameter signal S1 detected by the diameter sensor 38.

The diameter corrector 110 corrects the speed signal S18 from the switcher 74 based on the diameter signal S1 from the diameter sensor 38 and subtracts the correction signal S19 from the subtractor 112. Output to one input terminal.

As a result, the delivery control device 40 enters the selected state for the controller 100 for a period of time t3 (see Fig. 4E), and causes the delivery motor 34 to perform the tilt tension adjusting operation. The time t3 is set to another time due to tension deviation or internal gain of the controller. Therefore, several times t3 are measured and calculated | required previously in the state in which the gradient tension value differs.

The inclination tension adjustment operation is performed so that the tension of the inclination 12 is adjusted to the tension setting value T2 set in the tension setter 108 even if the immediately preceding position correction operation is performed.

The rotation speed of the output shaft of the delivery motor 34 is detected by the taco generating device 42 connected to the output shaft, and is output to the other input terminal of the subtraction section 112 as the delivery rotation speed signal S2.

The subtraction section 112 subtracts the delivery rotation speed signal S2 from the selected speed signal S18, outputs the result of the subtraction to the driver 114, and drives the delivery motor 34. Therefore, the transmission control apparatus 40 is one structure of the feedback circuit II which controls the transmission motor 34 so that the speed of the inclination 12 sent from the transmission beam 14 may become the speed according to the correction signal S19. It acts as an element.

As shown in Fig. 4, the time t1, t2, t3 is such that after the last position correcting operation is completed, the inclination tension adjustment operation is completed (specifically, having a relationship of t2 < t1 + t3), and the main control device 70 ), And the previous position correction amount setter 82 and the setter 80 are preset. For this reason, there exists an overlapping time t4 (from when time t1 elapses after the operation button 72 is pressed until after time t2 elapses after the operation button 72 is pressed). Therefore, the loom 10 corrects the position immediately before and adjusts the inclination tension.

Preferably, the relationship between the time t3 and the time t1 is made into a database in advance in response to the tension deviation, and the time t1 is read out from the setter 80 in response to the deviation detected immediately before the operation of the loom 10 is prepared. Determine time t1 and start each operation.

However, even if the last position correction operation and the gradient tension adjustment operation are performed at the same time, the position of immediately before 22 is hardly influenced by the gradient tension adjustment operation, and is mainly adjusted by the last position correction operation.

More specifically, as described above, mechanical parts such as heald frame 18, body 20, heald, and dropper exist between the sending beam 14 and the immediately preceding 22, and are inclined with these. Since friction occurs with (12), even if the inclined 12 is moved by rotating the delivery beam 14, most of such movement is absorbed by the friction of the heald frame 18, the body 20, and the like. The position immediately before 22 rarely moves forward and backward in the inclined movement direction.

In addition, since there is little intervening between the lottery roll 28 and the immediately before 22, and the space | interval between the lottery roll 28 and the immediately before 22 is small, the inclination movement direction by rotation of the lottery roll 28 is carried out. Movement of the fabric 24 to the fabric is reliably transmitted to the fabric 24 itself. For this reason, the position of immediately before 22 is reliably moved to the upstream or downstream in the oblique movement direction by rotating the lottery roll 28 by a position correction operation immediately before. Therefore, the occurrence of the stomach is surely prevented.

When time t2 elapses after the operation button 72 is pressed, the previous position correcting operation is completed, but the inclination tension adjusting operation is continuously performed. However, the position immediately before 22 is hardly deviated even if the inclination tension adjustment operation is performed.

More specifically, as described above, mechanical parts such as heald frame 18, body 20, a heald, a dropper, and the like exist between the delivery beam 14 and the position immediately before 22. Friction occurs in the furnace slope 12. For this reason, even if the inclination 12 is moved by rotating the delivery beam 14, it is hard to convey to the immediately preceding 22 by the friction of the heald frame 18, the body 20, etc. Therefore, even if the inclination tension adjustment operation is performed, the position of immediately before 22 is hardly moved, and the occurrence of the upper end is surely prevented.

In addition, since the rotational force of the delivery beam 14 is correctly transmitted to the inclination 12 wound around the transmission beam 14, the relationship between the rotational force of the delivery beam 14 and the tension of the inclination 12 is clear, and the inclination is It is suitable for adjustment of tension.

When the time t3 elapses, the gradient tension adjusting operation is completed. As a result, the immediately preceding position correction operation and the gradient tension adjustment operation are completed once.

Subsequently, the main controller 70 outputs the operation signal S6 to the switch 74 and causes the loom 10 to start normal operation.

As shown in Fig. 3, the switch 74 inputs the operation signal S6 to put the control unit 94 in the selected state during operation, and the speed signal S16 in the normal operation as the speed signal S18. Output to 110).

As described above, the controller 96 corrects the speed signal S15 corresponding to the rotational speed to be corrected so that the tension value of the inclination 12 becomes the tension setting value T1 set in the tension setter 106. ) And outputs the converted correction speed signal S15 to one input terminal of the adder 104.

During normal operation, the basic rotational amount signal generator 84 and the basic speed signal generator 102 shown in Figs. 2 and 3 are respectively based on the body stroke density, the rotation angle signal S4 of the rotating main shaft 46, and the like. The basic rotational amount signal S10 and the speed signal S14 corresponding to the moving speed of the fabric 24 according to the weaving are output to the other input terminals of the adders 86 and 104.

In addition, the drive amount signal generator 76 does not output the last position control signal S11 to the adder 86 because the last position correction operation has been completed.

The above-mentioned last position correcting operation has been described in the case where the tilt tension adjusting operation is started after the start of the last position correcting operation and the last position correcting operation is terminated thereafter. However, the tilt tension adjusting operation is started after the last position correcting operation is finished. You may have to. In this case, a signal indicating the end of the last position correcting operation (operation completion) may be output from the winding control device 62 to the delivery control device 40 to start the tilt tension adjusting operation.

In the above embodiment, the inclination tension adjustment operation is started after the time t1 has elapsed since the start of the immediately preceding position correction operation. However, when the inclination tension adjustment operation time t3 is sufficiently large relative to the previous position correction operation time t2, the time t1 is set. It may be shortened, or it may be set to time t1 = 0 (that is, to start the previous position correction operation and the gradient tension adjustment operation simultaneously).

Moreover, in this invention, it can also be modified as follows. For example, it can be considered that the length of the inclination tension adjustment period is changed by the amount of decrease in the inclination tension generated during the loom stopping period. More specifically, the problem is less likely to occur when stopping for a long period of time, but when the cause of the stop is recovered quickly and the amount of decrease in the gradient tension is small, the period required for the gradient tension adjustment operation is shortened. In other words, when the recovery is made quickly, it is conceivable that the end of the previous position correcting operation is later than the end of the inclination tension adjusting operation, resulting in a problem similar to the conventional one. Therefore, preferably, when the amount of deviation of the inclination tension immediately before the operation preparation is small, the time t1 is lengthened so that the end of the inclination tension adjustment operation is made later than the end of the previous position correction operation. Preferably, the inclination tension deviation signal is input to the setter 80 shown in Fig. 2, and a plurality of times t1 are set according to the tension deviation, and when the operation preparation signal S7 is generated, the detected tension deviation is applied. Based on this, the corresponding time difference, time t1, is configured to be selectable.

Referring to Fig. 5, the delivery control device 40 and the winding control device 62 change the last position control signal S11 value of the last position correcting operation based on the inclination tension value, and adjust the last position correcting operation time. Adjust

More specifically, the control unit 98 at the time of operation of the delivery control device 40 is the tension value (T2) set in the tension setter 108 and the tension signal (S3) detected by the gradient tension sensor 44 The difference [Delta] T of the tension values is output to the controller 100 and output to the speed corrector 116.

The speed compensator 116 receives the speed command value signal S20 that is greater than 1 according to the difference ΔT of the tension values in order to speed up the immediately preceding position correction operation in accordance with the decrease of the difference ΔT of the tension values. ) Is output to the drive amount signal generator 76. The relationship between ΔT and K may have a relationship based on a table previously measured by an experiment or may have a relationship represented by a specific calculation formula. In this case, the gradient tension adjusting operation time t3 is set constant.

When the speed command value signal S20 is input, the driving amount signal generator 76 multiplies the value set in the last position correction amount setter 82 by K and outputs it to the adder 86 as the last position control signal S11. . As a result, the last position control signal S11 becomes larger than the last position control signal S11 output from the drive amount signal generator 76 shown in FIG. In other words, the rotational speed of the lottery roll 28 at the time of the last position correction operation is made faster than the rotational speed of the lottery roll 28 at the time of the normal immediately previous position correction operation, and the time required for the last position correction operation is shortened. . In this manner, the inclination tension adjustment operation ends after the last position correction operation ends.

In Fig. 6, the horizontal axis represents the time axis, and the vertical axis represents the winding speed corresponding to the last position control signal S11 output from the drive amount signal generator 76. The area of the part shown by the diagonal line has shown the movement amount (last position correction amount) of the immediately preceding 22 position.

6A and 6B, it can be seen that as the winding speed is increased, the last position correction operation time t2 is shortened. For this reason, by shortening the last position correction operation period, the end timing of the tension adjustment operation can be delayed in appearance.

Referring to Fig. 7, the feeding control device 40 and the winding control device 62 change the speed signal S17 value during the operation of the gradient tension adjusting operation based on the setting value of the last position correction amount setting device 82. By doing so, an example of adjusting the time taken for the tilt tension adjusting operation is shown.

When the last position correction amount is set to a large value, the tension adjustment operation time is apparently lengthened by reducing the output value of the speed signal S17 during the operation of the tension adjustment operation, thereby delaying the end timing of the tension adjustment operation.

Specifically, when the last position correcting operation time t2 is independent of the set correction amount of the last position (i.e., is driven at a speed calculated so that the last position correcting operation time t2 is constant), the controller moves during operation ( The value of the gain signal S21 of the gain corrector 118 of 100 is reduced.

The above-described prevention device shown in Fig. 7 obtains the inclination tension adjustment operation time t3 once, and obtains the gain signal S21 in the tension adjustment operation or the speed command value signal of the immediately preceding correction operation from the relationship with the last position correction operation time t2. By changing (S20), the end time of the tension adjustment operation may be later than the end time of the previous position correction operation.

More specifically, the winding control device 62 outputs the value set in the last position correction amount setter 82 to the gain corrector 118. The gain corrector 118 outputs to the controller 100 a gain signal S21 corresponding to a positive real number K2 of 1 or less, depending on the value set in the last position correction amount setter 82.

When the gain signal S21 is input, the controller 100 multiplies the value of the difference between the tension setter 108 and the tension signal S3 by the coefficient K2 having a value of less than 1, and thus the speed during operation. It outputs as signal S17. Thereby, the operation speed signal S17 becomes a value smaller than the operation speed signal S17 output by the controller 100 shown in FIG. In other words, the rotational speed of the delivery beam 14 at the time of the gradient tension adjustment operation is made later than the rotational speed of the delivery beam 14 at the time of the normal tension adjustment operation, and the period required for the gradient tension adjustment operation is lengthened. Thereby, by lengthening the time required for the inclination tension adjustment operation, the end timing of the immediately preceding position correction operation is apparent.

6 and 7, the speed correction amount and the gain are changed when a large value is set for the previous position correction amount. However, in this invention, it can also be modified as follows.

For example, it can be considered that the length of the inclination tension adjustment period is changed by the amount of decrease in the inclination tension generated during the loom stopping period. More specifically, a problem is unlikely to occur when stopping for a long period of time, but when the cause of the stop is quickly recovered and the amount of decrease in the gradient tension is small, the period required for the gradient tension adjustment operation is shortened. In other words, when the recovery is quick, it is conceivable that the end of the previous position correcting operation is later than the end of the inclination tension adjusting operation, resulting in a problem similar to the conventional one.

For this reason, preferably, when the amount of deviation of the inclination tension immediately before the operation preparation is small, speed correction is performed so as to reduce the speed during the previous position correction operation, or the gain of the gain compensator is reduced so that the rotational speed of the delivery beam is reduced. The end of the tilt tension adjusting operation may be later than the end of the previous position correcting operation. Preferably, the slope tension deviation signal is input to the speed corrector and the gain corrector shown in Figs. 6 and 7, and a plurality of correction coefficients and gains are set in accordance with the tension deviation, and when the operation preparation signal S7 is generated, Based on the detected tension deviation, the corresponding correction coefficient or gain is configured to be selectable.

In addition, each operation time of the last position correction operation and the inclination tension adjustment operation is estimated, and the time difference between the start timings of the last position correction operation and the inclination tension adjustment operation is determined based on each operation time, and the previous position correction is made based on the time difference. The operation and the tilt tension adjusting operation may be started.

The time difference between the timing at which the immediately preceding position correction operation is started and the timing at which the gradient tension adjustment operation is started may be a value selected according to one value or an element that causes unevenness of the gradient tension from a preset value. For example, as an element in which the inclination of the inclination tension occurs, the inclination tension setting value, the inclination opening amount, and the like are considered in addition to the stop time of the loom as described above. As related to the inclined opening amount, the main shaft crank angle and the like when the loom is in a stationary state are considered.

The rotation speed of the lottery roll 28 at the time of the last position correction operation may be made faster than the rotation speed of the lottery roll 28 at the time of the normal last position correction operation, and the period required for the last position correction operation may be shortened.

The rotational speed of the delivery beam 14 at the time of the gradient tension adjustment operation may be made later than the rotational speed of the delivery beam 14 at the time of the normal immediately preceding position correction operation, and the period required for the gradient tension adjustment operation may be lengthened.

The speed difference between the rotational speed of the lottery rolls 28 during the last position correction operation and the rotational speed of the lottery rolls 28 during the normal position correction operation is uneven from one value or a preset value. It is good also as a value selected according to this generation factor.

The lottery roll 28 may be rotated forward or backward in the period during which the operation is ready for operation. More specifically, the previous position correcting operation is not limited to being performed only once when preparing the loom for operation, and may be performed twice. For two runs, rotate both in the same direction (for example, both forward or reverse), or rotate in different directions (forward to reverse, or reverse to forward). It is also possible.

On the other hand, the inclination tension adjustment operation may be performed for each immediately preceding position correction operation or may be performed during the last immediate position correction operation. The previous position correcting operation is not limited to two times but can be performed three times or more.

In the detection of the inclination tension, the inclination tension sensor 44 detects the load acting on the back roller 16 to detect the tension of the entire inclination. However, the tension of the inclination 12 may be detected.

The inclination tension sensor 44 which detects the load acting on the back roller 16 may be a form which detects the distortion and displacement of the back roller 16. FIG.

Although the inclination tension sensor 44 is provided in the back roller 16 so that the load acting on the back roller 16 may be provided, it may be provided in any of the members which contact the inclination 12 or the cloth 24.

Although the loom 10 shown in FIG. 1 to FIG. 4 controls the lottery roll 28 and the sending beam 14 by another circuit, it is comprised so that the lottery roll 28 and the sending beam 14 may be controlled by a single control circuit. You may also

The generators 76, 78, 84, the controllers 96, 100, the diameter corrector 110, and the feedback circuits I, II may be realized by software processing using a microcomputer in addition to hardware processing.

The present invention may be applied to the switching loom 10. For example, in the loom which selectively switches the plurality of weft densities according to the number of weft insertion picks, the amount of immediately preceding position correction operation at the time of operation is set according to the weft density at the time of operation. Alternatively, in the loom for switching the inclined target tension in accordance with the change in the weft density, the target inclination tension during operation is set in accordance with the target inclination tension corresponding to the weft density during operation.

Although the internal structure of the controller 96 was PID control, a well-known controller may be sufficient and a more simplified control may be sufficient as it. The simplified control may include a comparator for comparing the inclination tension with a set value and a speed command output circuit for switching the speed command output state according to the comparison result, and outputting a low speed command value in the direction of eliminating tension deviation. The output may be stopped when the set tension is reached.

The present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit thereof.

In the loom prevention method and apparatus which concerns on this invention, in the loom which performs the correction | amendment operation of an immediate position, or the operation | movement adjustment of inclination tension before a normal operation of a loom, it is certain that an upper edge is precisely adjusted by adjusting the value of actual position immediately before inclination tension. It has the effect of the invention which can be prevented.

Simple modifications and variations of the present invention can be readily used by those skilled in the art, and all such variations or modifications can be considered to be included within the scope of the present invention.

Claims (6)

After the operation preparation operation including the last position correcting operation of rotating the lottery roll to move the last position to a predetermined position and the tilt tension adjusting operation of rotating the delivery beam to adjust the tilt tension to a predetermined value, the loom is normally operated. In the above prevention method of driving, And terminating the operation preparation operation by terminating the inclination tension adjustment operation after terminating the immediately preceding position correction operation. The method of claim 1, further comprising starting the inclination tension adjustment operation after starting the immediately preceding position correction operation. The method of claim 2, further comprising starting the tilt tension adjusting operation after the last position correcting operation ends. 3. The method according to claim 2, wherein the respective operating times of the immediately preceding position correcting operation and the inclined tension adjusting operation are estimated, and the time difference between the starting time of the immediately preceding position correcting operation and the inclined tension adjusting operation is determined based on each operating time. And determining the start time of the inclination tension adjustment operation based on the time difference. 5. The method according to claim 4, wherein the time difference between the timing at which the immediately preceding position correction operation is started and the timing at which the tilt tension adjustment operation is started is selected according to an unevenness of the tilt tension from one value or a preset value. Preventing the upper end of the loom, characterized in that the value. A previous position corrector for rotating the lottery roll to move the previous position to a predetermined position; A gradient tension regulator for rotating the delivery beam to adjust the gradient tension to a predetermined value; In the above-mentioned prevention device of the loom including a main control device for starting the normal operation to the loom after the operation of the previous position corrector and the inclination tension regulator is finished, And the main control device terminates the tilt tension adjusting operation after the last position correcting operation ends, and ends the operation preparation operation.