JPH02139458A - Delivery control device of weaving machine - Google Patents

Abstract

PURPOSE:To prevent occurrence of weaving bar by compensating a kick back amount by an amount of revolution of weaving machine after restarting of weaving machine or an amount of reverse rotation of delivery motor followed by pick finding operation. CONSTITUTION:A counter 26 measures an amount theta of reverse rotation of a delivery motor M by output of a rotary encoder EN and the amount is compared with a set amount alpha0 of reverse rotation provided as an output of a multiplication device 33 by a comparator 23. When theta=theta0 the comparator 23 generates output, flip-flop 24 is reset and a weaving machine is restarted. A kick back amount compensating means 30 compensates a kick back amount K by correcting the amount theta of reverse rotation of the delivery motor M depending upon number n of operating cycles after restarting of weaving machine.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a weaving machine feed-out control device, in particular, a system for controlling the weaving machine when the weaving machine stops for a short period of time within several cycles after being restarted. This invention relates to a delivery control device for a loom that is improved so that steps do not occur.

Conventional technology When a loom that is constantly in operation stops, the automatic reversing operation is applied to set the loom to a predetermined machine rotation angle position, and the cause of the stop is fixed, such as when a workman pulls out defective weft threads. It is best to wait in a state convenient for repair operations.
This operation is generally referred to as the automatic indexing 1-operation. If the cause of the stoppage is latching, 1. The loom is
Thereafter, the weaver increments and reverses the weaving process to the maximum opening angle position, removes defective weft threads, and manually reverses the rotation angle to a predetermined starting rotation angle position, and then restarts the weaving process.

When performing such a reversal operation, it is necessary to always move the weaving cloth position to the normal state by rotating the warp beam delivery motor in the opposite direction. In general, the amount of reverse rotation required is equivalent to one pick of warp threads each time the loom's mechanical rotation angle crosses 0 degrees. It is possible to effectively prevent a weaving stage (hereinafter referred to as a stop stage) due to a reverse operation. .

On the other hand, the loom cannot obtain sufficient reed beating force for several cycles immediately after startup, and while the loom is stopped, the warp threads elongate, which causes the weaving stage (hereinafter referred to as the startup stage) to elongate. ) occurs. In order to prevent the startup stage, when restarting the loom, only the °C1 delivery motor is further rotated in the reverse direction.
It is necessary to move the weaving front position back toward the warp beam side from the iE standard weaving front position, and this is particularly called a kickback operation. Generally, the amount of kickback at this time is
Depending on the weaving structure, type of warp, etc., it is necessary to set the required amount in the longitudinal direction of the warp to be more than one pick of the warp.

Now, if we consider the case when the loom stops due to weft stop (
(Fig. 5), immediately after the loom stops, among the weft yarns WoSWl, W2, etc. inserted into the woven fabric W, the weft yarn Wo closest to the regular front position A is at the weft stop. This is the defective weft that caused the problem ((1) in the same figure). Therefore, if the loom is automatically reversed by the pick-up operation to a predetermined machine rotation angle at which the warp yarns Y1 and Y2 close, the delivery simulator is reversely rotated accordingly, so that the weft yarn Wo is 1 Move back by the pick amount ((2) in the same figure)
). Therefore, the craftsman can further pull out the weft yarn Wo by rotating the loom in reverse order and opening the warp yarns Y1 and Y2 by the maximum amount.

Subsequently, when the loom is reversed again and set at a predetermined mechanical rotation angle position for starting, the delivery motor is also operated to rotate in the reverse direction ((3) in the same figure).

Next, when the loom is restarted, a kickback operation is further performed ((4) in the figure). In other words, since the reed striking force in the few cycles immediately after restarting is weak, for example, the beat line in the first cycle after restarting is 3 in the figure.
It remains at the position shown by 1, and the beat lines in the second, third, and so on cycles are 132, B3, and so on in the same figure.
The cloth front position in each cycle immediately after startup gradually approaches the regular cloth sleeve position A. Therefore, at the time of restart, if a kickback operation is performed using a kickback amount K that matches the beat line B1 of the first cycle, the occurrence of the startup stage can be effectively prevented. In addition, from the second cycle onward, the weaving position gradually approaches the regular weaving position A (this is because the warp tension in each cycle is detected and the unwinding distance of the unwinding motor is optimally controlled). This is because the control system operates.

In this series of controls, kickback ff1K is
This can be easily achieved by measuring the winding diameter of the warp beam and reversing the delivery motor by the amount of reverse rotation 0 represented by θ=/D (Japanese Patent Laid-Open No. 61-8
Publication No. 3355). Furthermore, when considering the elongation of the warp yarns Y1 and Y2, it is sufficient to reflect the elapsed time from the stop F of the loom to the restart of the loom in the reverse rotation village θ. By measuring and storing the amount of rotation θp and using this as a unit and determining the amount of reverse rotation θ using θ-aθp (a is an appropriate constant), the kickback ff1K can be determined without measuring the winding diameter of the warp beam. (the same publication).

In view of the problem to be solved by the invention, when using such conventional technology, if the loom stops within a very short period of time within several cycles after restarting the loom, there is a risk that weaving steps may occur. be. In other words, as mentioned above, within a few cycles immediately after restarting the loom, the weaving cloth position that has been retreated by the kickback operation does not return to the normal cloth cloth position. On the other hand, if you perform a reverse rotation operation of the delivery motor and a kickback operation as the loom reverses, as in the case of stopping and restarting after a long period of operation, the amount of retraction of the loom when restarting This is because the number of stages becomes excessive and, on the contrary, the generation of four stages is avoided.

In general, malfunctions of weft inserting parts such as weft inserting valves that create fluid jets for weft flying, locking pins of drum-type weft length measuring devices, and opening failures due to various mechanical causes are temporary. Therefore, if the cause of the loom stopping is incompletely removed, the loom often stops immediately after being restarted. Therefore, if the start-up operation of the loom is repeated without removing these causes of stoppage, deviations from the normal loom position will accumulate, resulting in the formation of four tiers with significant negative layers.

Therefore, in view of the actual state of the prior art, it is an object of the present invention to measure the loom rotation m after restarting the loom, and thereby calculate the amount of kickback or the amount of reverse rotation of the feed motor associated with the pick-up operation. By making this correction, even if the time from restart to stop is a short period of several cycles, it is possible to maintain the weaving cloth position optimally and effectively prevent the occurrence of weaving steps. An object of the present invention is to provide a delivery control device for a loom.

Means for Solving the Problems The structure of the present invention for achieving the above object is such that when preventing the starting stage each time a kickback operation is performed,
Kickback amount correction means is provided, which includes a rotation amount detector that detects the amount of loom rotation after the loom is started, and a correction amount calculator that determines the amount of kickback correction based on the amount of loom rotation from the rotation amount detector. The gist of the back amount correction means is to correct the kickback amount in accordance with the rotation amount of the loom.

In addition, in the case where the stop stage is prevented by reverse rotation of the feed motor corresponding to the feed amount for one pick of warp threads in conjunction with the pick-up operation, a reverse rotation amount correcting means with a similar structure is provided, and the loom The amount of reverse rotation of the delivery motor may be corrected depending on the amount of rotation.

Furthermore, in a device that performs both the kickback operation and the reverse rotation of the feed motor accompanying the pick-up operation, both a kickback amount correction means and a reverse rotation amount correction means are provided, and the amount of rotation of the loom is According to this, correction may be made to both the amount of kickback and the amount of reverse rotation of the delivery motor.

Therefore, with this configuration, if the loom stops for a short period of time within several cycles after the loom is restarted, the weaving front position will be adjusted to accommodate the kickback caused by the previous stop and restart. There is a possibility that the influence of the backward motion of the weaving cloth remains due to the operation, but this influence can be eliminated by adjusting the kickback amount at the next restart according to the amount of loom rotation after the loom starts. It is possible to completely eliminate the noise by correcting it so that it is smaller than the normal case after long-term operation.

This also applies to the reverse rotation of the feed-out motor accompanying the feed-out operation. Therefore, the configuration of the reverse rotation amount correcting means may be exactly the same as that of the kickback amount correcting means.

In addition, in the case of a device that performs both kickback operation and reverse rotation of the feed-out motor accompanying the opening operation, the amount of kickback and the amount of reverse rotation have the same effect on the movement of the cloth cloth position. Since the kickback amount correction means and the reverse rotation amount correction means have the same configuration, it is sufficient to correct both of them.

Example Examples will be described below with reference to the drawings.

The feed-out control device for a loom is a closed-loop control system in which a tension sensor 11 and a winding diameter sensor 12 are used as detection ends, and a feed-out motor M is used as an operating end (Fig. 1).
, a summing point 14 , a drive amplifier 15 , and a kickback control device 20 including a kickback amount correction means 30 .

The warp yarns Y are wound around a warp beam WB driven by a feed-out motor M, and are pulled out toward a breast roll (not shown) via a tension roll 1゛R.
The upper warp Y1 and the lower warp Y2 are separated by a heddle (not shown) and opened, and beaten by a reed (not shown) to form a woven fabric. A delivery motor M having a speed generator G and a rotary encoder EN is directly connected to the warp beam WB.

'J/7 sensor 11 is, for example, tension roll 1
``A load cell element that detects the force applied to R,
The output is the tension T of the warp Y, and the control device main body 13
has been entered. The winding diameter sensor 12 detects the warp beam WB.
This is an arbitrary type of sensor that detects the winding diameter of the winding diameter, and its output is also input to the control device main body 13.

The output of the control device main body 13 is the kick pack control device @20
through the relay contact Ryb included in the summing point 14
Its output is connected to the delivery motor M via the drive amplifier 15. Addition point 14
The output of the speed generator 1゛G is fed back to the subtraction terminal of .

The kickback control device 20 includes, in addition to the kickback amount correction means 30, a kickback amount setter 21, a kickback amount calculator 22, a comparator 23, and a counter 26 as main components.

The outputs of the kickback amount setting device 21 and the winding diameter sensor 12 are input to the kickback amount calculator 22, and the outputs are input to the multiplier 3 included in the kickback amount correction means 30.
3 to the comparator 23. Further, the output of the rotary encoder EN is connected to the other input of the comparator 23 via the counter 26.

The output of the comparator 23 is connected to the recent terminal R of the flip-flop 24, and the set terminal S thereof receives a kickback command signal S1 from a loom control circuit (not shown). The output terminal Q of the flip-flop 24 is branch-connected to a relay Ry and a one-shot pulse generator 25, and the output of the latter is connected to a clear terminal C of a counter 26. A speed setter ST is connected to the other addition terminal of the summing point 14 via a relay contact Rya, and the relay contact Rya is driven by the relay Ry together with the aforementioned relay contact Ryb.

The kickback amount correction means 30 includes a starting counter 31;
A correction amount calculator 32 and the above-mentioned multiplier 33 are serially connected in this order, and the starting counter 31 receives a zero degree signal S2 whose signal source is an encoder for detecting the mechanical rotation angle of a loom (not shown) and a zero degree signal S2 (not shown). A loom operating signal S3 from a loom control circuit that does not operate is input.

During normal operation of the loom, relay Ry is in the reset state, so relay contact Ryb is closed and relay contact Ry
a is open, the control device main body 13 uses the tension T of the warp Y from the tension sensor 11 and the winding diameter of the warp beam WB from the winding diameter sensor 12 to control the feed-out motor M.
By driving and controlling the warp yarns Y, the tension 1'' of the warp yarns Y can be maintained at a predetermined value. Generally, the tension T reaches its peak at the time of beating the reed, so keeping the tension 1' at a predetermined value means that the warp Y by the delivery motor M is maintained so that the fabric front position is maintained at the normal position. The transmission control will be executed. Note that the winding diameter is determined by the feed motor M.
This is used to prevent the delivery m of the warp yarn Y from varying depending on the winding diameter and to keep the closed loop gain of the control system constant.

When the loom stops due to some cause of loom stoppage, the control device main body 13 stops its operation in response to a stop signal from a loom control circuit (not shown), so that the feed motor M
The fabric also stops, and therefore the loom position remains as it is at that moment.

In conjunction with the pick-up operation after the loom stops and the subsequent manual reverse operation, the feed-out motor M performs a reverse rotation operation corresponding to the feed-out amount of one pick of the warp Y at that time by a reverse rotation control circuit (not shown). , to deal with fluctuations in the loom position due to removal of defective wefts, etc.

Subsequently, prior to restarting the loom, a kickback command signal S1 is generated, so the flip-flop 24 is set and the relay Ry is activated. Therefore, since the speed setter ST is connected to the summing point 14 via the relay contact Rya, the delivery motor M can rotate in reverse at a constant speed set in the speed setter ST. On the other hand, the counter 26 is cleared by the output of the one-shot pulse generator 25 at the same time as the relay Ry is activated, and then the reverse rotation amount θ of the delivery motor M can be measured by the output of the rotary encoder EN. This reverse rotation amount θ is compared with a set reverse rotation mθ0 given as an output of a multiplier 33 in a comparator 23.

The comparator 23 compares the input reverse rotation mθ with the set reverse rotation mθ0, and when 0=00, generates an output and resets the flip-flop 24, so that the relay RY is reset. , then the loom is immediately restarted. Further, the control device main body 13 can simultaneously start the delivery control by the delivery motor M. That is, at this time, the kickback operation performed by the delivery motor M rotates the delivery motor M by the reverse rotation amount θ=
The rotation is reversed by 00.

The setting device [01 rotation amount θ0 is calculated by the kickback amount calculator 22 and the kickback amount correction means 30 based on the kickback setting value a set in the kickback amount setting device 21. In other words, kickback now
If the set value a is set in units of 1 pick of warp yarn Y, then 1, + vine back ■ Calculator 22
Using the winding diameter from the winding diameter sensor 12, the reference setting reverse rotation ■θol can be calculated by θol=ay/D. However, here, Ko=ay represents the set kickback amount at this time, so when the kickback correction amount δ input to the multiplier 33 is δ=1, it becomes θ0−θo1, The kickback operation of the set kickback claw Ko can be realized.

On the other hand, the activation counter 31 of the kickback amount correction means 30
inputs the zero degree signal S2 and the loom operation signal S3, and measures and stores the loom operating time up to the time of the previous loom stop in units of 360 degrees of mechanical rotation angle of the loom. That is, since the starting counter 31 can output the number n of operating cycles of the loom up to the time when the loom stopped last time,
If the human output characteristics of the correction amount calculator 32 are determined as shown in FIG. 2, for example, the kickback correction amount δ corresponding to the number of driving cycles n can be obtained as the output of the correction amount calculator 32. Using 00=6001, the set reverse rotation amount θ0 can be obtained.

Therefore, if the human output characteristics of the complementary τEUt calculator 32 are adapted to the movement characteristics of the beat lines B1, B2, etc. for each cycle immediately after restart (Fig. 5), then It is possible to effectively eliminate the effects of the kickback motion caused by That is, the kickback amount correction means 30 at this time operates to correct the kickback ftK by correcting the reverse rotation amount of the delivery motor M, which is 0, according to the number n of operation cycles after the loom is started. It is something that

Another embodiment of the kickback amount calculation unit 22 does not use the winding diameter, but the set reverse rotation ff1Oo1 in the kickback operation.
Figure 3). That is, if the binary counter 22b is driven by the output of the AND gate 22a which receives the zero temperature signal S2 and the loom operation signal S3 as input, the level of the output of the binary counter 22b will be reversed every cycle of the loom during operation. do. Therefore,
Output of rotary encoder EN and binary counter 22
If another AND gate 22c is provided which receives the output of loom B as an input, and its output is counted by a counter 22d, the rotation amount Op of the delivery motor M per cycle of the loom can be obtained as the content of the counter 22d. This corresponds to one pick of warp Y being sent out ffl y.

However, the counter 22d is cleared by 1 via the one-shot pulse generator 22e and by the rising edge of the output of the binary counter 22b. If the rotation amount θp of the delivery motor M measured in this way is transferred to the latch 22f and stored by the output of another one-shot pulse generator 22g that operates at the falling edge, the contents of the latch 22f are as follows. Since it is possible to obtain the rotation amount θp of the feed motor M corresponding to the feed my for one pick immediately before the table stops, the multiplier 22h is used to calculate 001=aθp as follows.
The set reverse rotation range θ01 can be calculated.

The starting counter 31 and the correction amount calculator 32 are respectively a counter 31a which inputs the zero degree signal S2, a one-shot pulse generator 31b1 which leads the loom operating signal S3 to the clear terminal C of the counter 31a, a decoder 32a, and a relay R.
I 5R2-Rn and setting device STI, Sr1...ST
(FIG. 4). The counter 31a measures the number n of operation cycles after the loom operation signal S3 is generated, while the decoder 32a measures one of the relays R1, R2, . . .
relay contacts R1a, R2a,
...R2n sets the setting device STI, S'I'2...
- One of the set values δ1, δ2, . . . δn of S'l'n can be selected and output as the kickback correction amount δ.

However, when the number of digits in counter 3] and a overflows,
Decoder 32a shall operate relay Rn,
The set value δn selected by relay Rn is δn-1
You can leave it as .

In the above explanation, zero degree Iha No. S2 is simply for counting the number n of operating cycles of the loom in units of 360 degrees of mechanical rotation angle of the loom, so it does not correspond to the actual mechanical rotation angle of 0 degrees. It is not necessary to indicate the angle, and it may indicate any other angle within 0 to 360 degrees.

In addition, since the start counter 31 measures the operating time of the loom after starting the loom in units of 360 degrees of machine rotation angle, instead of this, the resolution of the encoder for detecting the machine rotation angle of the loom is set to the minimum. The rotation of the loom itself may be measured using an arbitrary machine rotation angle as a unit. Furthermore, when the starting curve of the loom is fixed, an appropriate timer may be provided to measure the elapsed time after starting the loom. Furthermore, the rotation of the loom may be determined by the difference between the rotation angles of each machine when the loom is started and when it is stopped. That is, the activation counter 31 is
It is sufficient to use a rotation m detector that can accurately detect the loom rotation after the loom starts, or an alternative amount.
If the output is not an integer, the input/output characteristics (FIG. 2) of the correction amount calculator 32 may be given as a continuous curve. Since the accurate kickback correction amount δ can be determined in accordance with the rotation of the loom after starting the loom, it is possible to realize a more precise correction operation.

The kickback control device 20 according to each of the following embodiments includes:
The same structure 1 can be directly applied to the reverse rotation operation of the delivery motor M accompanying the I'' delivery operation.

That is, for example, in FIG. 1, the kickback command signal S1 is set as the reverse rotation command signal S4, and the following:
Kickback amount setting device 21, kickpack amount calculator 22
, Kirapack group setting value a1 kickback compensation "E amount δ,
Reverse rotation amount setter 21, reverse rotation amount calculator 22, respectively.
By replacing the reverse rotation amount setting value a with the reverse rotation correction amount δ, the reverse rotation control device 20 can be formed, and at this time, the kickback amount correction means 30 also becomes the reverse rotation amount correction means 30. E] During the unwinding operation, by outputting a reverse rotation command signal S4 from a loom control circuit (not shown),
The delivery motor M can be controlled to rotate backward by a predetermined reverse rotation amount θ=00.

Generally, the reverse rotation m of the feed motor M accompanying the feed operation
Since O need only correspond to one pick feed ff1y of the warp Y, the reverse rotation m set value a is set to a-1.

If the kickback ff1K at restart is set to a value that does not exceed the delivery claw y by 1 big of the warp Y, the kickback operation will be performed when the loom rotation amount after restart is within several cycles. The influence caused by this does not exceed the feed-out amount y for one pick, and therefore, this can be effectively eliminated by correcting the reverse rotation ■θ of the feed-out motor M that accompanies the feed-out operation.

Further, the delivery motor M is controlled by these reverse rotation control devices 20.
and the kickback control device 20. Since both the reverse rotation amount θ of the feed-out motor M during the pick-up operation and the kickback IK during the kickback operation can be corrected in accordance with the loom rotation amount, the kickback ff1K is equal to 1 of the warp Y. -Even if it exceeds the pick amount send-out my, it can not only be handled without any problem, but also by combining the correction amount for each department, it is possible to realize a layer-accurate correction operation. .

Effects of the Invention As described in 2, according to the present invention, the kickback correction amount is determined based on the rotating star detector that detects the amount of rotation of the loom after starting the loom, and the amount of rotation of the loom from the rotation amount detector. By providing a kickback amount correction means that corrects the coarse kickback according to the amount of rotation of the loom, it is possible to correct the previous kickback when the loom stops for a short period of time within several cycles after restarting. Even if the influence of the operation remains, the current kickback amount can be set to correct it by erasing it, so it is possible to effectively prevent the occurrence of weaving steps due to restarting. This has an excellent effect.

Furthermore, if a reverse rotation amount correcting means having a similar configuration is provided, the occurrence of the weaving rows that are missed in the same case can be prevented. It is also possible to prevent the reverse rotation m of the delivery mortar accompanying the operation by compensating the pressure, and furthermore, by using both the reverse rotation amount correction means and the kickback amount correction means,
- There is an excellent effect that layer-accurate correction operation can be realized.

[Brief explanation of the drawing]

FIGS. 1 and 2 show an embodiment, with FIG. 1 being an explanatory diagram of the overall system, and FIG. 2 being an input/output characteristic diagram of the correction-m arithmetic unit. FIG. 3 and FIG. 4 are main part system explanatory diagrams showing different embodiments, respectively. FIG. 5 is an operation diagram showing a conventional example. M... Delivery motor K... Kickback amount θ... Reverse rotation amount δ... Kickback correction amount, reverse rotation correction amount 30...
Kickback amount correction means, reverse rotation amount correction means 32... correction amount calculator

Claims (1)

[Scope of Claims] 1) In a loom delivery control device that prevents the startup stage by reversely rotating the delivery motor corresponding to a predetermined amount of kickback when restarting the loom, detecting the amount of rotation of the loom after starting the loom. A kickback amount correcting means is provided, the kickback amount correcting means comprising a rotation amount detector that detects the amount of rotation of the loom, and a correction amount calculator that determines a kickback correction amount based on the amount of rotation of the loom from the rotation amount detector. A delivery control device for a loom, characterized by correcting an amount of kickback according to an amount of rotation. 2) In a loom delivery control device that prevents a stop stage by reverse rotation of the delivery motor corresponding to the delivery amount for one pick of warp threads as a result of the start-up operation after the loom has stopped, the amount of loom rotation after the loom is started. A reverse rotation amount correction means is attached, which includes a rotation amount detector for detecting the amount of rotation of the loom, and a correction amount calculator that determines the amount of correction for reverse rotation of the delivery motor based on the amount of rotation of the loom from the rotation amount detector. A feed-out control device for a loom, wherein the amount correction means corrects the amount of reverse rotation of the feed-out motor in accordance with the amount of rotation of the loom. 3) With the start-up operation after the loom has stopped, the stop stage is prevented by reverse rotation of the delivery motor, which is equivalent to the delivery amount for one pick of warp threads, and when the loom is restarted, A feed-out control device for a loom that prevents a starting stage due to reverse rotation of a feed-out motor, comprising a kickback amount correction means as set forth in claim 1, and a reverse rotation amount correction means as set forth in claim 2. A loom, wherein the kickback amount correction means and the reverse rotation amount correction means correct the kickback amount and the reverse rotation amount of the delivery motor, respectively, according to the rotation amount of the loom. delivery control device.