JPH0730490B2 - Electric feeding control device for loom - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an electric feed device for a loom that is effective for preventing a weft bar.

[Conventional technology]

When the weaving machine stops due to a weft insertion error, it is a general repair method in the case of a weft insertion error to reverse the loom to remove the defective weft insertion error and to restart the operation. At this time, a weaving bar called a stop mark is usually generated on the woven cloth. The cause of the loom is caused by the fact that the loom does not come to an appropriate position even when the loom is rotated in the reverse direction, and a transient insufficient beating force is generated when the loom is started. That is, when the weaving machine is stopped due to a weft insertion error and then the weaving machine is reversed by one rotation for repairing the weft thread, the take-up roll and the delivery beam are mechanically reversed by one rotation.

However, the cloth fell does not move by an amount corresponding to one rotation. The reason is that there is contact resistance due to friction between the warp threads and the breast beam. That is, as seen in FIG. 1, the tension between the delivery beam and the opening portion of the warp thread is F1, the tension between the opening portion and the breast beam is F2, and further between the breast beam and the take-up roll. When the tension is F3, there is a relation of F1 <F2 <F3 between the tensions when the loom is in operation. Therefore, even when trying to reverse the loom by the necessary rotation amount at the time of restoration, the weaving mouth has the same amount as the reverse rotation amount. This is because it does not move exactly by the amount.

[Object of Invention and Means for Solving the Problem]

Therefore, a first object of the present invention is to set the magnitude relation of the warp thread tension to the opposite state after the reverse operation of the loom.

Therefore, according to the present invention, after the weaving machine is rotated in the reverse direction to remove the defective yarn, only the delivery beam is further reversed in the correction step for restarting so that the warp yarn tension becomes F1>F2> F3. The tension difference (F2-F3) is set to be larger than the contact resistance due to the friction in the breast beam, and the cloth fell is moved further than the normal position.

However, even if the cloth fell is accurately moved to the desired position only by this operation, if the operation is started as it is, the tension of the warp yarn is high, and the winding of the woven fabric becomes insufficient at the start of the operation. There is a weaving bar called. Also, when the tension of the warp threads is returned to the normal tension in the state where the cloth fell is at the desired position, the cloth fell advances, so the beating force at the time of start-up is insufficient, and a so-called thin row is formed. Will occur.

Therefore, a second object of the present invention is to solve the shortage of the beating force in the initial stage of starting after the restoration of the weft thread by adjusting the position of the cloth fell.

Therefore, in the present invention, the tension of the warp thread is set to F1>F2> F3, and after the cloth fell is retracted from the desired position by reverse rotation,
The warp yarns are fed in the forward direction, and the cloth fell is set at a position slightly retracted from the normal position during steady operation, that is, the cloth fell is placed at a position commensurate with insufficient beating force.

By the way, conventionally, the series of operations as described above, that is, the adjustment of the tension of the warp thread and the adjustment of the cloth fell position are performed exclusively
It is not automated because it depends on the skill and intuition of the workers.

Therefore, the third object of the present invention is to realize the adjustment of the tension and the cloth fell by the automatic control when the loom is restarted,
This is to ensure that the weaving bar can be prevented.

Therefore, the present invention incorporates a sequence circuit inside the electric feed-out control device, and at the time of correction before restarting the loom,
The rotation direction and the rotation amount of the sending motor can be accurately controlled digitally in relation to the winding diameter of the sending beam.

Example 1 First, FIG. 1 shows a delivery route of the warp yarn 1. The warp yarn 1 is wound around the delivery beam 2, passes through the tension rolls 3 and becomes substantially horizontal, forms an opening 5 by the heald 4, and intersects with the weft yarn 7 at the portion of the weave 6, so that the warp 8 Woven cloth 9 is formed by the striking motion. As is well known, the woven cloth 9 is made up of a stationary breast beam 10, press rolls 11 and 12, and a take-up roll 13
After being wound around the outer periphery of the cloth, the cloth winding beam 14 is successively wound up.

The delivery beam 2 and the take-up roll 13 are then provided.
Are respectively driven by the feeding motor 15 and the loom driving motor 16. Of course, the motor 16 serves as a power source for other main movements of the loom.

Next, FIG. 2 shows a control system of the feeding motor 15. The main part of this control system, that is, the electric feed-out control device 17 of the present invention is connected to the motor 15 via an addition point 18 and a drive amplifier 19. This motor 15
A tachogenerator 20 and an encoder 21 are mechanically connected to the. The tachogenerator 20 is connected to the addition point 18, and the encoder 21 and the winding diameter detector 22 provided in the part of the delivery beam 2 are both connected to the electric delivery control device 17. The electric feed-out control device 17 inputs a weft insertion error signal A, a preparation signal B, an operation signal C, a tension signal D of the warp thread 1, a motor rotation signal E, and a winding diameter signal F, and outputs a speed command signal G. And perform necessary sequential control.

Next, FIG. 3 shows the configuration of the electric feed-out control device 17.

A part of the electric feed-out control device 17 constitutes a tension feedback system in order to generate a speed command signal G by inputting the tension signal D and the winding diameter signal F.
That is, the input terminal 25 for the tension signal D is connected to the relay contact 63.
It is connected to the input end of, for example, a PID type control amplifier 28 via b through a summing point 27 together with a tension setting device 26. The control amplifier 28 is connected to the output terminal 32 via the sample hold circuit 29, the relay contact 67a, and the addition point 31. The characteristics of the control amplifier 28 are
It can be adjusted by the PID setter 30.

On the other hand, the input terminal 33 of the winding diameter signal F is connected to the input terminals of the function generators 35 and 42 for winding diameter correction, respectively. The above function generator 35 is a speed setter for forward and reverse rotation on the input end side.
Amplifier for forward rotation connected to 34 and branched at the output side
36, through an inverting amplifier 37 for reverse rotation and relay contacts 60a and 58a, it is connected to an addition point 38, and further, via a timer contact 64a, it is connected to the addition point 31.

Further, the function generator 42 has a relay contact 60 on the input end side.
Connected to the forward rotation amount setting device 39 by b, the reverse rotation amount setting device 40 at the time of lateral stop by the relay contacts 58b and 57a, and further connected to the reverse rotation amount setting device 41 other than the lateral stop by relay contacts 58b and 57b. The output end is connected to one input end of the comparison rotation 46 via the A / D converter 43.

The input terminal 44 for the motor rotation signal E is connected to the other input terminal of the comparison circuit 46 via the counter 45.
Further, the output terminal of the comparison circuit 46 is a timer contact 64b,
One shot multivibrator 47, amplifier 48,
It is connected to the matching operation relay 49 connected to the power supply terminal 50. In addition, in order to return the counter 45 to the initial state, a relay contact is placed between the clear terminal and the earth 69.
58c, 60c and an inverting circuit 68 are connected in series, and the inverting circuit 68 is connected to the power supply terminal 70 by a resistor 71 at the input end.

Further, the input terminals 51, 52 and 53 of the misfeeding signal A, the preparation signal B and the operation signal C are relays 65, 66 and 67, respectively.
Is connected to the power supply terminal 54 by.

The electric feed-out control device 17 of the present invention is provided with a sequence circuit 24 that uses the weft insertion error signal A, the preparation signal B, and the operation signal C as input conditions to prevent the weft.
This sequence circuit 24 has a relay between the power terminals 55 and 56.
57, 58, 59, 60, 61, and timer relays 62, 63, 64
Is equipped with. That is, a relay for misplacement
57 is connected in series between the power supply terminals 55 and 56 together with the relay contact 65a and the normally closed relay contact 67b. Then, for this relay contact 65a, hold relay contact 5
7c is connected in parallel. In addition, the relay 58 for reverse rotation
Are connected in series to the power supply terminals 55 and 56 by a relay contact 66a and a normally-closed type relay contact 59b. In addition, the relay 59 for storing reverse rotation complete has the power supply terminal 56 at one end.
, And the other end is connected to the other power supply terminal 55 by a normally closed type relay contact 67c and relay contacts 49a and 58d. A timer relay 62 is connected in parallel to the relay 59, and a series-connected relay contact 58
A relay contact 59a is connected in parallel to d and 49a. In addition, the relay 60 for forward rotation at the time of misinsertion is
The relay contacts 62a and 57d and the normally closed relay contact 61b are connected between the power supply terminals 55 and 56. The relay 61 for storing the normal rotation completion is connected in series to the power supply terminals 55, 56 by the relay contacts 60d, 49b and the normally closed relay contact 67d, and the relay contacts 60d, 49b are used for holding. The relay contact 61a is connected in parallel. Furthermore, the timer relays 63 and 64 are respectively connected by the relay contact 67e.
The relay contacts 60e and 58e connected in parallel are connected between the power supply terminals 55 and 56, respectively. Of these relay contacts or timer contacts, those that are in interlocking relationship are shown with the same numeral symbols, and the alphabetical subscript a,
It is distinguished by b..f.

Next, the operation of the present invention will be described with reference to FIGS. 4 and 5.

When the electric feed-out control device 17 receives the "H" level operation signal C from the main control device of the loom, the relay 67 for operation sets the relay contacts 67a, 67e to the ON state by the operation relay 67. When the loom is in steady rotation, the timer relay 63
Has set its contact 63b to the ON state, the tension signal D is output together with the output of the tension setter 26 and the control amplifier 28.
Will be input.

That is, the initial tension F1 of the warp thread 1 is given by the tension setter 26, and the tension signal D as a feedback signal is given.
At the same time, it is sent to the control amplifier 28 via the addition point 27. Here, the control amplifier 28 performs the proportional operation, the integral operation, and the derivative operation as necessary set by the PID setter 30, and outputs the signal via the sample hold circuit 29, the relay contact 67a, and the adder 31 to the speed command. The signal G is output from the output terminal 32. Therefore, the drive amplifier 19
Controls the rotation speed of the motor 15 on the basis of the speed command signal G to set the target rotation speed. Since the rotation of the motor 15 is detected by the tachogenerator 20 and is negatively fed back to the addition point 18, the rotation speed of the motor 15 is corrected to a speed value close to the target value under the feedback control. . On the other hand, since the motor 16 is for driving the loom, it always rotates at a constant speed. In such a steady operation state, since the timer contact 64a is in the off state, the output from the winding diameter correction function generator 35 is not applied to the addition point 31.

When a weft insertion error occurs during weaving, the operation signal C changes to the “L” level. Therefore, the relay 67 sets the relay contact 67a to the off state to stop the rotation of the motor 15. Also, the relay contacts 67b, 67c, 67d are returned to the ON state, and the relay contact 67e is set to the OFF state. At the same time, "H" level weft insertion error signal A
Relay 65a, the relay contacts 65a
By closing, the relay 57 for storing the misreading is activated. At this time, the relay 57 closes its holding relay contact 57c and stores the occurrence state of the misinsertion,
At the same time, the relay contact 57a is turned on, and the normally closed relay contact 57b is turned off.

Of course, when the "H" level operation signal C disappears, the loom drive motor 16 is also delayed and set to a stopped state based on the conventional control method. Usually, when the weaving machine stops due to this weft insertion error, the rotating system of the loom is rotating at a high speed, so that an appropriate braking time is set from the time when the weft insertion error signal A is generated to the stop. That is, the weaving machine usually beats the weft thread 7 having a weft insertion error from the time when the weft insertion error signal A is generated, the warp thread 1 forms the opening 5 for the next weft insertion, and the next weft thread 7 is formed. Is stopped inside the opening 5. Therefore, the time when the operation signal C changes to the "L" level is actually delayed by the braking time from the time when the weft insertion error occurs.

While the loom is stopped, a worker carries out a preparatory work, that is, a work of reversing the loom, feeding the yarn, and removing defective yarn. That is, as shown in FIG. 5 (a), the worker first pulls out the weft yarn 7 that has been inserted into the weft, and then sets both the delivery beam 2 and the winding roll 13 to 1
By reversing by the amount corresponding to the pick, the warp thread 1 is set to the open state at the portion of the defective weft thread 7'in FIG. 7B, and the defective weft thread 7'is pulled out. At this time, the new cloth fell 6 ′ two picks before the stop time should theoretically return from the cloth fell position P at the time of normal weaving by an amount equivalent to two picks, but the contact resistance due to the friction described above From the existence, the figure (b)
It returns only a little like. In this way, the preparation work is completed.

After that, when the correction work is performed, that is, when the loom is restarted, the work is started by adjusting the cloth fell 6 to an appropriate position. That is, as shown in FIG. 4 (a) by the operation of the worker, the "H" level preparation signal B is input to the sending-out control device 17 for a fixed time T1 on the time axis t, so that the preparation relay is prepared. 66
Excites the reverse relay 58 by closing the relay contact 66a for the fixed time T1. Therefore, in the relay 58, the corresponding relay contacts 58a, 58b, 58d, 58e are set to the ON state, and the relay contacts 58c are set to the OFF state. When this relay contact 58c turns off,
Since the inverting circuit 68 generates a signal for returning the initial state to the clear input terminal of the counter 45, the count value of the counter 45 is set to "0" at this stage, and the motor rotation signal E is counted thereafter. It becomes possible. When the relay contact 58e is closed, the timer relay 64 becomes
Set a and 64b to ON after a short time delay. Therefore, the speed signal from the speed setter 34 is converted into a signal that is inversely proportional to the winding diameter signal by the function generator 35, and is output from the adding point 31 via the inverting amplifier 37, the relay contact 58a, the adding point 38 and the timer contact 64a. The speed command signal G in the reverse rotation direction is sent to the terminal 32.

On the other hand, since the relay contacts 57a and 58b are in the ON state, the reverse rotation amount signal of the reverse rotation amount setting device 40 is output by the function generator 42 to the winding diameter signal F.
Is converted into a signal inversely proportional to, and is sent to one input end of the comparison circuit 46 via the A / D converter 43. Here, the function generator 42 is provided in order to make the movement amount of the warp yarn 1 at the cloth fell 6 constant regardless of the size of the winding diameter. In this way, at the beginning of the correction work, the motor 15
Will reverse at a certain speed V15.

The reverse rotation of the motor 15 is detected by the encoder 21 as a digital motor rotation signal E and is input to the counter 45 from the input terminal 44. Here, the counter 45 detects the rotation amount of the motor 15 and sends the rotation amount to the comparison circuit 46. Therefore, the comparison circuit 46 compares the reverse rotation amount preset by the reverse rotation amount setting device 40 with the actual reverse rotation amount in the reverse direction, generates a “H” level match signal when both match, and turns on the timer contact 64b. After that, it is sent to the one-shot multivibrator 47. In this way, the one-shot multivibrator 47 sets the contacts 49a and 49b to the ON state for that time period by driving the coincidence signal output relay 49 for a certain time period. The timer contact 64b is provided to prevent the occurrence of a false match signal at the initial stage of rotation.

In this way, when the relay contact 49a is set to the on state, the other relay contacts 58d and 67c are both set to the on state, so the relay 59 immediately operates,
The holding relay contact 59a is set to the ON state, the reverse rotation completion state is stored, and the relay contact 59b is set to the OFF state, whereby the relay 58 is brought into the non-excitation state. Therefore, the relay contact 58a is set to the OFF state, the speed signal from the speed setter 34 is cut off, and the reverse movement is stopped after a lapse of time T2 from the start of reverse rotation, for example. At the same time, since the relay contact 58c is set to the ON state, the counter 45 is cleared.

At the same time, the timer relay 62 is in the excited state, and the timer contact 62a is set to the ON state for a certain time. At this time, the forward rotation relay 60 is energized, and the relay contacts 60a, 60b, 60d, and 60e are all set to the on state, and the relay contact 60c is set to the off state.
Also at this time, the timer relay 64 sets the timer contacts 64a and 64b to the ON state after a short time delay, and the relay contact 60c enables the counter 45 to count the motor rotation signal E. Set to state. In this way
The speed signal from the speed setter 34 is
The signal is converted by the function generator 35 as a signal that is inversely proportional to the winding diameter signal F, and passes through the amplifier 36, the relay contact 60a, the adding point 38, the timer contact 64a, and the adding point 31, and the output terminal 32.
Sent to the drive amplifier 19. For this reason the drive amplifier
19 rotates the motor 15 in the forward rotation direction at a given speed V15 in the latter half of the correction work.

On the other hand, the forward rotation amount signal from the forward rotation amount setting device 39 is the relay contact.
It is input to the function generator 42 via 60b, becomes an analog signal inversely proportional to the winding diameter signal F, and then becomes a digital signal by the A / D converter 43, and is sent to the comparison circuit 46. Here, as in the previous reverse rotation, the comparison circuit 46
The actual forward rotation amount of 15 is compared with the set value, and when they match each other, a "H" level match signal is generated. At this time, relay 49
Relay 61a by closing relay contacts 49a, 49b.
To excite. This relay 61 is a relay contact for holding it.
61a is set to the ON state, the forward rotation completion state is stored, and the relay contact 61b is set to the OFF state so that the relay 60 is de-energized.
Set 0b, 60d, and 60e to the off state, and set the relay contact 60c to the on state. Therefore, the speed signal from the speed setter 34 is cut off, for example, at the time T3
After that, the forward rotation motion is stopped. In this way, when a weft insertion error occurs, the reverse rotation and the forward rotation operation in the series of correction work after the preparation work are completed.

The reverse rotation of the sending-out motor 15 in the above correction work causes the tension difference (F2-F3) to be made larger than the contact resistance due to the friction in the breast beam 10 to further retract the cloth fell 6, and FIG. ), The movement amount Δ is larger than the regular cloth fell position P.
Corresponding to moving backward by L. In this way, the amount of movement of the cloth fell 6 is set to a constant value for the type of the warp thread 1 by the correction operation, regardless of the change in the winding diameter of the warp thread 1 with the delivery beam 2.

Further, the rotation of the motor 15 in the forward rotation direction after that is performed by the cloth fell 6
As shown in FIG. 5 (d), the normal position of the cloth fell P
This corresponds to setting the position P ′ which is slightly retracted. This return amount Δ1 is used to enhance the beating force when the loom is started. The feed amount (ΔL−Δ1) in the advancing direction is effective for alleviating the high force of the warp yarn 1 and preventing the occurrence of thick steps in the initial stage of the subsequent activation. Therefore, this new cloth fell position P ′ is a harmony point between prevention of the weft due to the lack of the beating force at the initial stage of activation and prevention of the thick run due to the increase in the tension of the warp yarn 1. In this way, the appropriate tension of the warp thread 1 and the appropriate weft position P'are automatically set.

Since the series of reverse operation and the normal operation described above are automatically performed during the constant time T1 regardless of the winding diameter, the warp yarn 1 stretches substantially during this time. Therefore,
Since the uncertain factor at the stage of such correction work is eliminated, the effect of preventing the weaving bar is further ensured. The fixed time T1 of the preparation signal B is set by a one-shot multivibrator or the like on the side of the main controller of the loom. However,
The function generator 35 can be omitted when it is not necessary to complete the above-described series of reverse rotation operation and forward rotation operation within the fixed time T1. Even in this case, the effect of preventing the weft can be obtained.

After that, or immediately after that, when the operation signal C of "H" level is input by the operation of the worker, the corresponding relay 67 sets the relay contacts 67a and 67e to the ON state and the other relay contacts 67b. , 67c, 67d are turned off. Therefore, the timer relay 63 is delayed by a certain time.
It is excited under T4, and the relays 57, 59, 61 and the timer relay 62 are prohibited from operating. Of course, in synchronization with this, the loom drive motor 16 immediately rotates the loom. At this time, the rotation speed V16 of the motor 16 has a normal rising characteristic and reaches a steady speed after a certain time. On the other hand, the timer relay 63 keeps the timer contact 63 for a certain time T4.
Hold a in the on state and then return it to the off state. Therefore, the sample hold circuit 29 is held in the hold mode for a certain period of time T4 and starts the motor 15 at the rotation speed immediately before the motor 15 is stopped. After that, the timer contact 63b is turned on and the sample and hold circuit 29 is in the sample mode, so that the control amplifier 28
Receives the signal from the tension setter 26 and the tension signal D of the feedback system, and generates a steady speed signal G. This speed signal G is sent to the drive amplifier 19 from the output terminal 32 via the sample hold circuit 29. In this way, the delivery motor 15 reaches the steady-state rotation speed.

Here, the rising of the motor 15 is set to be steeper than that of the motor 16. This is because the loom 6 is returned to the regular loom position P before the loom drive motor 16 reaches a steady rotational speed.

When the loom is stopped for a reason other than a weft insertion error, it is not necessary to rotate the motor 15 in the forward direction in advance during the correction operation. Therefore, as shown in FIG. 4 (b), the time T2 for the reverse rotation of the motor 15 is set to be shorter than that at the time of stopping due to the misinsertion. The reverse rotation amount at this time is set by the reverse rotation amount setting device 41. In other words, since the relay 65 does not enter the starting state except when the side stops, the relay 57 does not enter the excitation state,
Therefore, in the correction stage, the signal from the reverse rotation amount setting device 41 is sent to the function generator 42 via the relay contact 58b. After that, by the same operation as the reverse rotation already described, the motor
15 will be reversed by the required amount of rotation. In this way, even when the weaving is not stopped, the motor 15 is rotated in the reverse direction so that the lowering of the beating force at the initial stage of starting the loom is corrected by the backward movement of the weft 6, so that the occurrence of the loom is caused. It can be surely prevented.

Second Embodiment Next, FIG. 6 shows another embodiment for driving the relay 49 for coincidence operation. The delivery control device 17 in this embodiment indirectly measures the winding diameter of the delivery beam 2 by counting the rotation amount of the delivery motor 15 per revolution of the loom during operation of the loom, A signal with a feed amount equivalent to one pick is generated. Therefore, in this embodiment, the winding diameter detector 22 is unnecessary.

That is, the input terminal 44 of the motor rotation amount signal E is connected to one input end of each of the digital multipliers 74, 75 and 76 via the counter 45, the other counter 72 and the latch 73. On the other hand, the input terminal 77 of the one-rotation signal J of the loom is
Relay contact 67f and one-shot multivibrator 7
8 to branch to the load input terminal of the latch circuit 73, and then to the counter via the one-shot multivibrator 79.
It is connected to each of the 72 clear terminals. The other input terminals of the digital multipliers 74, 75, and 76 are the digital setter 80 for setting the forward rotation ratio, the digital setter 81 for setting the reverse rotation ratio when the wedling stops, and the reverse ratio setting other than the wedling stop. Are respectively connected to the digital setters 82 for.
The output terminal of the digital multiplier 74 is connected to the relay contact 60b.
Is connected to one input terminal of the comparison circuit 46, and the other digital multipliers 75 and 76 are similarly relayed via relay contacts 57a and 57b by a common relay contact 58b. The other internal configuration of the device 17 is
It is similar to that of FIG.

During the operation of the loom, the digital motor rotation amount signal E from the encoder 21 is input to the counter 72 and accumulated. On the other hand, the one-rotation signal J of the loom is input to the clear input end of the counter 72 and the load input end of the latch 73 via the one-shot multivibrators 78 and 79 when the operation signal C exists. Therefore, every time the loom rotates once, the calculated value of the counter 72 is input to the latch 73, and then the counter 72 is returned to the initial state. In this way, during the operation of the loom, the rotation amount of the feeding motor 15 is stored in the latch 73 for each revolution of the loom. Therefore, the output signal of the latch 73 is a feed amount signal corresponding to one pitch and has a value corrected by the size of the winding diameter of the delivery beam 2. And
These are input to the respective digital multipliers 74, 75, 76.

On the other hand, since the number corresponding to the required feed amount is preset in the digital setters 80, 81, 82, the digital multiplier 75,
The reference numeral 76 feeds the reverse rotation amount signal H for stoppage and the reverse rotation amount signal K other than stoppage to one input end of the comparison circuit 46, respectively. Further, the digital multiplier 74 sends the rotation amount signal I in the forward rotation direction at the time of stopping to the one input end of the comparison circuit 46 via the relay contact 60b. In this way, the reverse rotation amount and the normal rotation amount are digitally set.

In the above embodiment, the actual rotation amount of the feed motor is detected, and the feed motor is rotated in the reverse and forward directions under the feedback control. However, instead of this, the delivery motor may be rotated under open loop control.

〔The invention's effect〕

 In the present invention, the following unique effects are obtained.

At the stage of the correction work during the stoppage of the loom due to a weft insertion error, the feed-out control device rotates the feed-out beam in the opposite direction to increase the tension of the warp thread, and after that, by rotating the feed-out motor in the forward direction, Regardless of the presence of contact resistance in the breast beam, the cloth fell can be accurately set at a position slightly retracted from the normal weaving position. In other words, by temporarily reversing the delivery motor excessively, the cloth fell can be moved with a tension sufficient to overcome the contact resistance, so the influence of the contact resistance is eliminated,
The cloth fell can be reliably retracted. Further, by subsequently rotating the delivery motor in the normal direction, the cloth fell can be accurately set to a position slightly retracted from the normal position. Therefore, even in the initial stage of the start of the loom, an appropriate repulsive force can be obtained, and it is possible to prevent the occurrence of the loom when the loom is stopped. And since these rotation amount controls can be automatically performed by sequence control, complicated operations required at the initial stage of starting the loom are eliminated, and the starting operation can be simplified,
The burden on workers can be reduced.

In addition, during normal rotation or reverse rotation during a stop period due to such a mis-insertion error, the function generator uses the winding diameter signal as an input condition, or the counter and rich inputs the motor rotation signal as an input condition, and Since a signal for setting the forward rotation amount or the reverse rotation amount is generated in an inversely proportional state,
Regardless of the winding diameter of the warp thread of the sending beam, the amount of forward rotation or reverse rotation during the correction work during the stop period can always be set to a constant value for that warp thread. It is possible to reliably realize the effect of preventing the weaving bar.

[Brief description of drawings]

FIG. 1 is a skeleton diagram showing a warp yarn feeding route and a woven fabric winding route, FIG. 2 is a block diagram of a control system of a feeding motor, FIG. 3 is a block diagram of a feeding control device, and FIG. FIG. 5 is a time chart of speed control of the delivery motor, FIG. 5 is an explanatory view showing a moving state of the cloth fell, and FIG. 6 is a block diagram of a main part of another embodiment of the delivery control device. 1 ... Warp thread, 2 ... Delivery beam, 5 ... Aperture, 6
…… Origuchi, 9 …… Woven cloth, 10 …… Breast beam, 13 ……
Take-up roll, 14 …… Cloth winding beam, 15 …… Motor for feeding controlled object, 16 …… Motor for driving loom, 17
...... Electrical feed control device of the present invention, 19 ...... Drive amplifier, 22 ...... Roll diameter detector, 24 ...... Sequence circuit, 26 ......
Tension setting device, 28 ... Control amplifier, 29 ... Sample and hold circuit, 31 ... Adding point, 32 ... Output terminal, 34 ...
Speed setter, 35, 42 ... Function generator for roll diameter correction,
39 …… Forward rotation amount setting device, 40, 41 …… Reverse rotation amount setting device, 43 ……
A / D converter, 45 …… Counter, 46 …… Comparison circuit, 49 ……
Matching relays, 57, 58, 59, 60, 61 ... Relays,
62, 63, 64 …… Timer relay, 65, 66, 67 …… Relay, 72 …… Counter, 73 …… Latch, 74, 75, 76 …… Digital multiplier.

Claims (3)

[Claims] 1. An electric feed-out control device for a loom that controls the rotation of a feed-out motor so that the warp tension reaches a target tension, and the amount of rotation of the feed-out motor in the reverse direction and the forward direction is inversely proportional to the winding diameter of the feed beam. A rotation amount setting means for outputting a signal, and prior to starting the loom stopped due to a weft insertion error, reverses the feed motor based on the rotation amount signal in the reverse rotation direction,
After setting the cloth fell to a position retracted from the normal cloth cloth position by the movement amount, the feed motor is rotated in the normal direction based on the rotation amount signal in the forward rotation direction, and the cloth cloth is returned by the returning distance from the normal cloth cloth position. An electric feed control device for a loom, comprising a sequence circuit for setting the retracted position and then restarting the loom at the returning amount position. 2. The rotation amount setting means is composed of a function generator which receives signals from the reverse rotation amount setting device and the normal rotation amount setting device and a winding diameter signal of the outgoing beam and generates a signal inversely proportional to the winding diameter. The electric feed control device for the loom according to claim 1, wherein 3. A means for detecting the feed amount signal corresponding to one pick of the loom by inputting the rotation amount signal of the feed motor and the one rotation signal of the loom, and the rotation amount setting means for reversing the feed amount signal and The electric feed-out control device for a loom according to claim 1, wherein the electric feed-out control device comprises a plurality of multipliers each of which receives a magnification signal from a setting device for forward rotation.