JP3177357B2 - Jet loom operation control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet loom operation control device capable of maximizing overall operation efficiency while maintaining a stable weft insertion operation in a jet loom.

[0002]

2. Description of the Related Art In a jet loom, particularly an air jet loom, weft insertion may become unstable due to a change in flight characteristics of a weft used for weaving. This is considered to be mainly due to a change in the air resistance of the yarn due to a change in the yarn physical properties such as the thickness of the yarn and the size of the fluff in the longitudinal direction of the weft.

In order to maintain a stable weft insertion operation even when the flight characteristics of the weft change, the arrival angle of the weft (a weft of a predetermined length is inserted into the warp opening, and the leading end of the weft is Focusing on the loom machine angle that reaches the anti-weft insertion side, the same applies hereinafter), when the arrival angle deviates from a predetermined target arrival angle and an arrival angle deviation occurs, the start angle (weft insertion operation starts) And a technique for correcting and controlling the weft insertion air pressure (for example, JP-A-3-40837). In this case, based on the arrival angle deviation, first, the start angle is corrected and controlled, and then the air pressure is corrected and controlled, thereby improving the overall control response and realizing a stable weft insertion operation. Can be.

[0004]

According to the conventional technique, the weaving condition of the loom is controlled so as to achieve a predetermined reaching angle. There is a problem that the time from the completion to the completion is too long, and the overall operation efficiency is suppressed low, which is irrational. That is, at this time, the loom is forced to operate at a low speed even though there is room to further increase the rotation speed.

Accordingly, an object of the present invention is to provide a stable weft insertion by giving priority to the correction control of the weft insertion condition, including the rotation speed of the loom, as a control object, in consideration of the problems of the prior art. An object of the present invention is to provide a jet loom operation control device capable of maximizing the operation efficiency of a loom while maintaining operation.

[0006]

In order to achieve the above object, the present invention comprises a deviation detecting means for detecting an arrival angle deviation from a weft arrival angle and a target arrival angle, and an arrival angle from the deviation detecting means. A weft insertion control device that corrects the reference value of the weft insertion condition based on the deviation, and the set rotation speed is corrected according to the correction amount of the weft insertion control device, and the weft insertion control device is corrected by controlling the rotation speed of the loom The gist of the present invention is to provide a rotation speed control device for eliminating the amount.

The deviation detecting means detects the arrival angle deviation of each weft inserted in the multicolor weft, and the weft insertion control device is provided for each weft, and based on the arrival angle deviation of each weft from the deviation detecting means. By correcting the reference value of the weft insertion condition, the rotation speed control device can correct the set rotation speed in accordance with the correction amount of each weft insertion control device.

Further, the rotation speed control device can correct the set rotation speed in accordance with the average value, the minimum value or the maximum value of the correction amount of each weft insertion control device.

[0009]

According to the structure of the invention, the weft insertion control device corrects the reference value of the weft insertion condition based on the arrival angle deviation from the deviation detecting means, and the rotation speed control device corrects the correction amount of the weft insertion control device. The set rotation speed of the loom is corrected in accordance with.
Therefore, the rotation speed control device at this time can eliminate the correction amount in the weft insertion control device and control the rotation speed of the loom so that the weft insertion condition matches the reference value. That is, the weft insertion control device can correct and control the weft insertion condition prior to the control of the rotation speed by the rotation speed control device by correcting the reference value of the weft insertion condition. In addition, the reference value of the weft insertion condition, when the weft insertion control device to control the start angle as the weft insertion condition, refers to the reference start angle, when the air pressure for weft insertion is the control target,
Refers to the reference air pressure.

When the deviation detection means detects the arrival angle deviation of each weft, the weft insertion control device provided for each weft corrects the reference value of the weft insertion condition based on the arrival angle deviation of each weft, and The control device corrects the set rotation speed in accordance with the correction amount of each weft insertion control device. Therefore, a similar operation state can be realized in a loom that performs multicolor weft insertion.

When the rotation speed control device operates according to the average value of the correction amount of the weft insertion control device, the loom continues operating at a rotation speed at which the average value of the arrival angle deviation of each weft is eliminated. When operating in accordance with the minimum value and the maximum value of the correction amount, the loom uses a rotation speed at which the arrival angle deviation of the weft having the worst flight characteristics or the best weft is eliminated. Driving can be continued.

[0012]

Embodiments will be described below with reference to the drawings.

The jet loom operation control device includes a deviation detecting means 10, a weft insertion control device 20, and a rotation speed control device 30.
(FIG. 1).

The arrival angle detector 11 of the deviation detecting means 10 receives the weft signal S1 from the weft feeler WF and the angle signal S2 from the encoder EN. It is assumed that the weft feeler WF is installed on the non-weft insertion side of a loom (not shown), and detects that the inserted weft has reached the non-weft insertion side and outputs a weft signal S1. The encoder EN is connected to a main shaft of a loom (not shown) and detects a loom mechanical angle θ to output an angle signal S2.
Is output. The output of the arrival angle detector 11 is input to the comparing means 12 as an arrival angle θe, and the setting means 12a for setting the target arrival angle θeo is provided to the comparing means 12.
Is attached.

The output of the comparing means 12 is supplied to the weft insertion control device 2
It is connected to a zero correction amount calculator 21. The output of the correction amount calculator 21 is connected to the on-off valve V via a summing point 22 and a timing controller 23. A setting device 22a is connected to another addition terminal of the summing point 22. I have. Incidentally, the angle signal S2 from the encoder EN is also input to the timing controller 23. Here, the on-off valve V is interposed between an air source (not shown) and an air nozzle NZ for weft insertion. The weft (not shown) opens the on-off valve V to activate the air nozzle NZ. The weft is inserted into the warp shedding via an air jet from the NZ.

The output of the correction amount calculator 21 is also branched to the correction amount calculator 31 of the rotation speed control device 30. The output of the correction amount calculator 31 is the summing point 32, the control amplifier 3
3 is connected to the drive motor M. However, the drive motor M is a driving motor of a loom (not shown), and a setting device 32 a is connected to another addition terminal of the addition point 32.

The setting device 22a of the weft insertion control device 20 includes:
The reference start angle θo is set. Here, the reference start angle θo is a reference value of the start angle θs. Therefore,
Assuming that the correction amount θd from the correction amount calculator 21 is 0, the adding point 22 at this time is a start angle θs = θo + θd = θ.
is output to the timing controller 23, and the timing controller 23 compares the loom mechanical angle θ from the encoder EN with the start angle θs, thereby opening the on-off valve V at θ = θs and starting the weft insertion operation. it can. Note that the timing controller 23 closes the on-off valve V after a predetermined time has elapsed, and ends the weft insertion operation.

The weft for weft insertion is supplied from a yarn supplying body and stored in a length measuring storage device. Therefore, the weft is θ
When the weft insertion nozzle NZ is operated at = θs to start unwinding from the length measuring and storing device, weft insertion is performed by an air jet from the weft insertion nozzle NZ. Thereafter, when the predetermined length is unwound from the length measuring and storing device, the rear end is locked, and in the final stage of weft insertion, the front end reaches the position of the weft feeler WF on the side opposite to the weft insertion side. , The weft feeler WF can generate the weft signal S1.

The arrival angle detector 11 of the deviation detecting means 10
Outputs the loom mechanical angle θ when the weft signal S1 is generated from the weft feeler WF to the comparison means 12 as the arrival angle θe. Therefore, the comparing means 12 is provided with the arrival angle detector 1
Is compared with the target arrival angle θeo from the setting device 12a, and the arrival angle deviation Δθe = θeo−θe
Can be calculated and output to the correction amount calculator 21 of the weft insertion control device 20.

The correction amount calculator 21 converts the arrival angle deviation Δθe from the deviation detection means 10 into a correction amount θd for the start angle θs, and outputs the correction amount θd to the summing point 22. Therefore, the weft insertion controller 20 at this time corrects the reference start angle θo based on the arrival angle deviation Δθe, and the start angle θs = θo
At + θd, the next and subsequent weft insertion operations can be performed.

The correction amount θd from the correction amount calculator 21 is also branched and input to the correction amount calculator 31 of the rotation speed control device 30. That is, the rotation speed control device 30 converts the correction amount θd into the rotation speed correction amount Nd via the correction amount calculator 31. Further, the set rotation speed No is set in the setter 32a. Therefore, the summing point 32 is set at the target rotational speed Ns.
= No + Nd can be output to the control amplifier 33,
The rotation speed control device 30 can control the rotation speed of the drive motor M, that is, the rotation speed N of the loom so that N = Ns = No + Nd. However, the control amplifier 33 feeds back the rotation speed of the drive motor M via a speed detector (not shown), and controls the rotation speed of the drive motor M so as to match the target rotation speed Ns.

The operation of the rotation speed control device 30 described above is shown in FIG.
Can be illustrated as follows. However, in FIG. 2, the horizontal axis is the time axis t, and the vertical axis passing t = 0 is the rotation speed N of the loom. The horizontal axis is the set rotation speed N = No.
And a point X is set on the vertical axis at an appropriate position above the position of N = No.

When the rotational speed of the loom N = No, the loom mechanical angle θ = 0 (degrees), θ = θo, θ = θs, θ = θe, θ = 3.
Each time t = -ta, t = 0, t =
ts, t = te and t = tb are defined on the horizontal axis. However,
θo is the reference start angle, θs = θo + θd is the start angle, θ
e is the arrival angle. At this time, the point X and t =
The straight lines Ba, Bs, Be, and Bb connecting the points -ta, t = ts, t = te, and t = tb respectively have the following relations when the rotational speed N of the loom fluctuates.
= 0 (degrees), θ = θs, θ = θe, and θ = 360 (degrees). The timings change in inverse proportion to the rotational speed N of the loom. However, the rotation speed N of the loom at this time is on the vertical axis so that the distance x from the point X to the horizontal axis is x = (No / N) xo. . For example, N = N1> No on the vertical axis
Is located at a distance x1 = (No / N1) xo <from the point X.
xo.

The time difference Td = ts, Tw = te− on the horizontal axis
ts represents the time corresponding to the correction amount θd and the time required for weft insertion when the rotational speed of the loom N = No. Therefore, if a straight line Be1 that passes through the point of t = ts on the horizontal axis and is parallel to the straight line Be is taken, the straight line Be1 becomes the time Tw required for weft insertion.
Is kept constant, the start angle θ with respect to the rotational speed N of the loom.
Show how s should change over time. That is, when the loom is operating at the set speed N = No,
For some reason, the time Tw required for weft insertion changes and the arrival angle θe fluctuates, and the arrival angle deviation Δθe = θeo−θe>
When 0 occurs, the correction amount calculator 21 calculates the arrival angle deviation Δ
By outputting the correction amount θd> 0 in accordance with θe, the weft insertion control device 20 can immediately correct and recover the arrival angle θe = θeo by setting the start angle θs = θo + θd.

At this time, the rotation speed control device 30
The correction amount calculator 31 generates a correction amount Nd corresponding to the correction amount θd, and controls the rotation speed N of the loom by correcting the set rotation speed No so that N = Ns = No + Nd = N1> No. . Here, N = N1> No is the rotation speed of the loom corresponding to the intersection of the straight line Be1 and the vertical axis, and the rotation speed N =
By setting N1, Td = 0 and .theta.d = 0 can be realized.

[0026]

Other Embodiments When n-color (n.gtoreq.2) multi-color weft insertion is performed by a loom, the deviation detecting means 10 is provided with n comparing means 12, 12,... An AND gate 13 is provided between the detector 11 and each comparing means 12, and the output of each comparing means 12 can be connected to a weft insertion control device 20, 20,... Provided for each weft. Each AND gate 13 is also supplied with a weft selection signal Swi (i = 1, 2,... N) corresponding to each weft.
Also, the starting angles θsi (i = 1, 2,... N) corresponding to the respective wefts are extracted from the weft insertion control devices 20, 20 and input to the averaging means 41. It is connected to the rotation speed control device 30 via the means 42. Note that a setting unit 42a is additionally provided to the comparing means 42.

Each comparing means 12 determines the arrival angle θei (i = 1, 2,...) Of each weft selected by the weft selection signal Swi.
n) and the target arrival angle θeo from the setting device 12a, the arrival angle deviation Δθei (i =
1, 2,... N) are calculated and output to the corresponding weft insertion control device 20. Therefore, each weft insertion control device 20 sets the start angle θs = θ for each weft based on the arrival angle deviation Δθei.
Correction control of si can be performed.

On the other hand, the averaging means 41
The start angle θsi from 0, 20... Is input, the average value θsa is calculated, and the comparing means 42 compares the average value θsa with the set start angle θso from the setting unit 42a to obtain a start angle deviation Δθs. = Θso−θsa to the rotation speed control device 30. Therefore, the rotation speed control device 30 at this time corrects the set rotation speed No in accordance with the average value of the correction amounts θd of the weft insertion control devices 20, 20,... To control the rotation speed N of the loom. it can. Start angle θ from each weft insertion control device 20
si is, in the weft insertion control device 20, θsi = θs =
This is because θo + θd corresponds to the correction amount θd in the weft insertion control device 20.

Here, the setting start angle θso set in the setting device 42a is set to θso = θo when the reference start angles θo set in the setting devices 22a of the weft insertion control devices 20 are all the same value. If the reference start angle θo is different for each weft, a representative value may be selected as the set start angle θso.

In FIG. 3, the averaging means 41 may be replaced with a minimum value selecting means for selecting the minimum value of the start angle θsi or a maximum value selecting means for selecting the maximum value of the start angle θsi. Starting angle θsi = θs among n-color wefts
The rotation speed N of the loom can be controlled by focusing on the correction amount θd that is the smallest or the correction amount θd that is the largest. The averaging means 41 may directly input and average the correction amount θd of each weft insertion control device 20 instead of the start angle θsi of each weft insertion control device 20. These can be omitted from the container 42a. However, at this time, when the correction amount θd has a positive or negative sign, the minimum value selecting means selects the minimum value having a positive sign or the minimum value having a negative sign and outputs the selected value to the rotation speed control device 30. Alternatively, the maximum value selection means may select the maximum value of a positive sign or the maximum value of a negative sign.

The deviation detecting means 10, 1 shown in FIGS.
0 is the measuring means 14 and the reference timing generator 1
5, the arrival angle deviations Δθe and Δθei may be detected temporally (FIGS. 4A and 4B). Since the reference timing generator 15 generates a reference timing signal St corresponding to the target arrival angle θeo at θ = θeo, each measuring means 14 outputs the weft signal S1 from the weft feeler WF and
The arrival angle deviations Δθe and Δθei can be calculated by measuring the time difference between each occurrence and the reference timing signal St. However, each measuring means 14 inputs the rotational speed N of the loom at that time, and converts the measured time difference into a loom mechanical angle.

Further, each measuring means 14 in FIG. 4 may be replaced with a simple slow speed discriminating means. That is, the slow speed determining means receives the weft signal S1 and the reference timing signal St, determines which of them has been input earlier in time, and outputs the determination result to the correction amount calculator 21. When the weft signal S1 is generated earlier than the reference timing signal St, the correction amount calculator 21 outputs a constant correction amount θd = + Δθ to the summing point 22 according to the result of the determination by the slow speed determining means. If the error occurs late, a certain amount of correction θd
= −Δθ can be output. Therefore, in the present invention, the arrival angle deviation Δθe from the deviation detection means 10 is
Δθei includes not only the value actually measured via the comparing means 12 and the measuring means 14 but also the result of the discrimination by the slow speed discriminating means.

In the above description, each weft insertion control device 2
The control object of 0 is the weft insertion nozzle NZ instead of the on-off valve V.
It may be a pressure regulating valve for regulating the air pressure supplied to the air. That is, each weft insertion control device 20 can correct the reference value of the weft insertion condition consisting of the reference start angle θo or the reference air pressure instead of the reference start angle θo based on the arrival angle deviations Δθe and Δθei. However, in general, the correction amount calculator 21 of the weft insertion control device 20 calculates the reference start angle θo
Is corrected, the correction amount θd having the same sign as the arrival angle deviations Δθe and Δθei may be output. However, when correcting the reference air pressure, the correction amount θd having the different sign is output. For example, if the flight characteristics of the weft deteriorate and the arrival angle deviations Δθe and Δθei become negative, the start angle θs becomes θs =
The correction must be made so that θo + θd <θo, but the air pressure at this time needs to be corrected in a direction higher than the reference air pressure.

The correction amount calculators 21 and 31 may include a dead band element and a limiter element inside. For example, the correction amount calculator 21 of FIG. 1 may respond only to the arrival angle deviation Δθe equal to or more than a certain amount and output a certain amount of correction θd.

In each of the above embodiments, the time when the weft reaches the non-weft insertion side is determined by the fact that the weft of a predetermined length is unwound from the length measuring and storing device in place of the weft signal S1 from the weft feeler WF. Or a signal indicating that the rear end is locked. The present invention can be applied to not only an air jet loom but also a water jet loom.

[0036]

As described above, according to the present invention, by combining the deviation detecting means, the weft insertion control device, and the rotation speed control device, the weft insertion control device can
While correcting the reference value of the weft insertion condition, the rotation speed control device corrects the set rotation speed corresponding to the correction amount of the weft insertion control device, and finally, the correction amount in the weft insertion control device is eliminated. The loom speed of the loom can be realized,
There is an excellent effect that the operation of the loom can be continued at the maximum rotational speed capable of maintaining a stable weft insertion operation, and the overall operation efficiency can be maximized.

The deviation detecting means detects the arrival angle deviation of each weft, and the weft insertion control means provided for each weft corrects the reference value of the weft insertion condition of each weft based on the arrival angle deviation of each weft. For example, a similar effect can be achieved in a loom that performs multicolor weft insertion.

[Brief description of the drawings]

FIG. 1 is a block diagram of the overall configuration

FIG. 2 is an operation explanatory diagram.

FIG. 3 is a diagram corresponding to FIG. 1 showing another embodiment.

FIG. 4 is a block diagram of a main part showing another embodiment.

[Explanation of symbols]

 N: rotation speed No: set rotation speed θeo: target arrival angle θe, θei (i = 1, 2,... N): arrival angle Δθe, Δθei (i = 1, 2,... N): arrival angle deviation θd: correction amount 10 ... deviation detecting means 20 ... weft insertion control device 30 ... rotation speed control device

Continuation of the front page (56) References JP-A-59-71459 (JP, A) JP-A-2-200846 (JP, A) JP-A-61-34258 (JP, A) JP-A-2-229245 (JP) JP-A-4-57940 (JP, A) JP-A-3-40837 (JP, A) JP-A-62-121057 (JP, A) JP-A-4-316643 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) D03D 47/28-47/38 D03D 51/12

Claims (3)

(57) [Claims] 1. A deviation detecting means for detecting an arrival angle deviation from an arrival angle of a weft and a target arrival angle, and a weft insertion control device for correcting a reference value of weft insertion conditions based on the arrival angle deviation from the deviation detection means. And a rotation speed control device for correcting the set rotation speed in accordance with the correction amount of the weft insertion control device, controlling the rotation speed of the loom, and eliminating the correction amount of the weft insertion control device. Room operation control device. 2. The deviation detecting means detects an arrival angle deviation of each weft to be multicolored, and the weft insertion control device includes:
Provided for each weft, correct the reference value of the weft insertion conditions based on the arrival angle deviation of each weft from the deviation detection means, the rotation speed control device, corresponding to the correction amount of each of the weft insertion control device 2. The method according to claim 1, wherein the set rotation speed is corrected.
An operation control device for a jet loom as described in the above. 3. The rotation speed control device according to claim 2, wherein the rotation speed control device corrects the set rotation speed in accordance with an average value, a minimum value, or a maximum value of the correction amounts of the weft insertion control devices. Operation control device for jet looms.