JP2854584B2 - Automatic repair control system for defective yarn of shuttleless loom - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing a defective yarn at the time of defective weft insertion in a shuttleless loom, and more particularly to a control method for automatically repairing a defective yarn.

2. Description of the Related Art When a weft insertion failure occurs during operation of a loom, the loom is stopped, and the winding device of the defective yarn removing device winds and removes the defective yarn. When winding the defective yarn, it is necessary to check whether the defective yarn has been normally removed. If defective winding of the defective yarn or breakage of the yarn occurs during the winding process, the defective yarn will remain in the woven fabric, and the quality of the woven fabric will be degraded. Therefore, the presence or absence of a defective yarn to be wound by the winding device is detected by a photoelectric sensor provided at a defective yarn guide port of the winding device, and the winding failure of the defective yarn and the breakage of the yarn are monitored.

For example, in the invention of Japanese Utility Model Laid-Open Publication No. Sho 62-41083, when the sensor detects that there is no defective yarn during the time originally required for the defective yarn to be wound by the winding device, the defective yarn breaks. Therefore, the winding of the winding device is stopped or the restart of the loom is prohibited. On the other hand, when the sensor detects that there is a defective yarn after the winding device is stopped, it is determined that the winding of the defective yarn is defective, and the restart of the weaving is prohibited.

Here, the set value of the winding time of the defective yarn in the winding device is set to be slightly longer than the time at which the defective yarn is actually wound. This is for reliably winding and removing the defective yarn. On the other hand, the above-mentioned "time originally required for the defective yarn to be wound by the winding device" is a set value of a monitoring time for detecting a broken yarn of the defective yarn, and is a value at which the defective yarn is actually wound. It is set slightly shorter than the deaf time. This is to avoid erroneous detection of a broken yarn of a defective yarn.

By the way, the set value of the winding time of the defective yarn and the set value of the monitoring time are set in the setter in advance by predicting the time when the defective yarn will be actually wound as described above. The actual winding time varies depending on the type of yarn, for example, the elasticity and thickness of the yarn. Therefore, it is necessary to set an appropriate time in consideration of these factors.

If the set value of the winding time is too short, the loom is started up with the defective yarn remaining, so that the quality of the woven fabric deteriorates. Conversely, if the set value of the winding time is too long, the idle time of the winding device of the defective yarn removing device becomes longer, and the operating rate of the loom decreases.

Also, if the set value of the monitoring time is too short, the non-monitoring time will be long, making it difficult to properly detect yarn breakage and winding failure of the defective yarn, which may lead to deterioration of the quality of the fabric. is there. On the other hand, if the set value of the monitoring time is too long, it is determined that the defective yarn is broken even though the defective yarn is normally removed, and the operating rate of the loom decreases.

Also, for example, even if an appropriate time can be set for one type of yarn, in a multicolor loom, since the type of weft yarn is often different, the set value of the winding time and the set value of the monitoring time are set. If the ratio is uniformly determined, the operating rate of the loom is reduced and the quality of the fabric is often reduced.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to set a proper set value of a winding time and a set value of a monitoring time according to a type of a weft in a shuttleless loom of a multicolor weave, thereby setting the quality of a woven fabric. It is an object of the present invention to provide a defective yarn automatic repair control device capable of improving the operating efficiency of a loom.

Means for Solving the Problems To achieve this object, the present invention relates to a multicolor weaving shuttleless loom, in which a defective weft insertion time is detected by a winding device that removes a defective yarn when a weft insertion defect is detected. And a monitoring circuit for monitoring a yarn signal from a sensor that detects whether or not the defective yarn is guided to the winding device, and a monitoring circuit that is provided according to the type of the weft yarn. A plurality of winding time setting circuits in which the winding times corresponding to the types are set, and a plurality of winding time setting circuits are provided according to the type of the weft yarn, and the monitoring time set values of the yarn signals corresponding to the types of the weft yarn are respectively set. A plurality of monitoring time setting circuits, and a first switching circuit having an input side connected to the plurality of winding time setting circuits and a weft selecting device for multicolor weaving, and an output side connected to the winding control circuit. And a second switching circuit having an input connected to the plurality of monitoring time setting circuits and the weft selecting device and an output connected to the monitoring circuit. And
The first switching circuit and the second switching circuit select a winding time setting circuit and a monitoring time setting circuit corresponding to a selection signal from the weft selecting device, and the winding control circuit and the monitoring circuit are selected. It operates based on the set values of the winding time setting circuit and the monitoring time setting circuit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a defective yarn automatic repair control device of the present invention will be described with reference to an embodiment based on the drawings.

FIG. 1 is a block diagram showing a control device for automatically repairing defective yarn of a shuttleless loom of the present invention.

The defective yarn removing device 11 has a winding device 13 for winding and removing the defective yarn 12, and the winding device 13 is driven by a driving motor. Then, the defective yarn 12 is guided to the winding device 13 by the guide nozzle 15, and when the guidance is completed, the defective yarn 12 is
Cut off at Further, the defective yarn removing device 11
The loom control device 19 and the control device 20 have a sensor 18 for detecting whether the winding device 12 is guided by the winding device 13.
It operates based on the command from. The defective yarn removing device 11 is disclosed in detail in Japanese Patent Application Laid-Open No. 62-184146.

Next, the loom control device 19, which originally controls the loom, receives the weft stop signal a indicating the occurrence of the defective yarn 12 and performs control for automatic repair of the defective yarn 12 by inputting a weft stop signal a. Is stopped so that the defective yarn 12 can be supplied to the defective yarn removing device 11, and a start command b is issued to the defective yarn removing device 11 to guide the defective yarn 12 to the winding device 13. Is issued a winding start command c.

The control device 20 receives a winding start command c from the loom control device 19.
In response to this, a drive command d is issued to the defective yarn removing device 11 to perform control for removing the defective yarn. That is, the take-up control circuit 21 inputs the winding start command c, between the set winding time on the winding time setting circuit 22 setting value T _1, in order to drive the winding device 13, the winding device 13 drive motors 14
Is issued a drive command d. Thereby, the defective yarn 12 is wound by the winding device 13. On the other hand, the control device 20 includes a monitoring circuit 23.
Is provided, the monitoring circuit 23, until the monitoring time set value T ₂ set in the monitoring time setting circuit 24 from the input time point of the winding start command c has elapsed, the yarn signal e from the sensor 18 It monitors that there is a state. Accordingly, during the winding operation, the yarn breakage or the like occurs in the defective yarn 12, and the yarn signal e
When there is no state, the monitoring circuit 23 generates an abnormal signal f to the winding control circuit 21. This abnormal signal f
Is issued, measures to stop the winding device 14 and prohibit the restart of the loom are taken.

The control device 20 is provided with a yarn signal time measuring circuit 25, and the take-up time set in the take-up time setting circuit 22 sets values T ₁ and monitoring time set value T set in the monitoring time setting circuit 24 a _second reference measurement time T ₀ is stored.

FIG. 2 is a block diagram showing details of a winding time setting circuit 22, a monitoring time setting circuit 24, and a yarn signal time measuring circuit 25 of the control device 20.

Winding time setting circuit 22 inputs the winding start command c, the winding start command c is time or winding time from the time when the input T _A has been wound up time calculated by the set value calculation unit 26 to match the set value T ₁ and outputs a winding end command g. Winding start command c the time calculating unit 27 calculates the winding time t _A from the time it is entered. That is, when the winding start command c is input to the reference pulse train generator 28 of the time calculating unit ₂₇ , the counter 29 sets the winding start designation c
There counts the number of pulses from the time of the input, and outputs to the comparator 30 and the count value as the winding time T _A.

On the other hand, the comparator 30 is supplied with the take-up time set value T ₁ calculated by the set value calculation unit 26, the count value is the winding time setting as the winding time T _A of the comparator 30 in the counter 29 determines whether matches the value T _1, issues a winding termination instruction g If it matches.

Calculation of the set value calculator winding time set value T ₁ of the 26, the measurement time is inputted from the yarn signal time measuring circuit 25 T ₀ and setter
It is obtained by adding the margin time ΔT ₁ set in 31 to the adder 32.

Monitoring time setting circuit 24 also has the same configuration as that of the take-up time setting circuit 22, subtracts the monitoring time set value T ₂ of the set value calculation unit configuration from the 33 measurement time T ₀ 34 margin time [Delta] T ₂ set in subtracted in vessel 35 to calculate the monitoring time set value T ₂ in. On the other hand, the winding start command c monitoring time T _B from being input is calculated by the time calculation unit 36. That is, it is calculated by counting the number of reference pulses generated by the reference pulse train generator 37 from the time when the winding start command c is input by the counter 38. Then, compared with the monitoring time set value T ₂ which is obtained by the subtractor 35 and the counted value as the monitoring time T _B in the comparator 39 outputs a match when the sensor detects end instruction h.

Then, the yarn signal time measuring circuit 25, a weft successfully picking, when pulled out the withdrawal speed of the optimum to the weft, and stores the measured time T ₀ required for its withdrawal. The counter 41 counts the number of pulses generated by the reference pulse train generator 40 from the time when the thread signal e from the sensor 18 is present to the time when it is absent,
Stored in the memory 42 the count value as the measurement time T _0. This measurement time T ₀ is measured in advance and stored.

What was in obtaining the measurement time T ₀ which is stored in the yarn signal time measuring circuit 25, kept electrically disconnect the yarn signal time measuring circuit 25 from the winding time setting circuit 22 and the monitoring time setting circuit 24. Then, in the set value calculation units 26 and 33 of the winding time setting circuit 22 and the monitoring time setting circuit 24, values longer than the time when the defective yarn is actually wound are set. .

In such a state, a simulated cross stop signal a is generated during the normal operation of the loom. When the simulated weft stop signal a is input, the loom control device 19 determines that a weft insertion defect has occurred, stops the loom, and simultaneously executes the defective yarn removing device 11.
To start the operation of removing the defective yarn 12.

That is, the loom control device 19 stops the weft insertion nozzle 16, stops the loom, and then starts the guide nozzle 15,
The defective yarn 12 is guided to the winding device 14, and the defective amount yarn is cut out by the cutter 17. Then, a winding start command c is issued to the control device 20.

Since the signal supplied to the loom control device 19 is a simulated weft stop signal a, the weft removed as a defective yarn is a normally inserted weft.

Next, the winding speed of the poorly wefted yarn varies depending on the type of yarn, the weaving density, and the like. Therefore, the weaving machine sets the optimum winding speed for the weft yarn being weft-inserted. That is, the winding device 14
Is controlled so as to match the set winding speed.

When the winding start command c is output from the loom control device 19 to the control device 20, the control device 20 outputs a drive command d to the drive motor 14 of the winding device 13, and the set optimum winding speed is set. Drives the winding device 13. On the other hand, the sensor 18 starts detecting a defective thread from the time point when the winding start designation c is input.
Since the winding time setting circuit 22 and the monitoring time setting circuit 24 are set to values longer than the time when the defective yarn 12 will be actually wound, before the winding of the defective yarn 12 is completed. The winding device 14 stops, or the sensor 18
It does not stop the detection of 12.

Since the yarn signal time measuring circuit 25 starts counting time when the detected yarn signal e is present, the winding start command c is output from the loom controller 19 when the winding signal e is output. The counting will be started. This is because when the winding start command c is output, the defective yarn is
This is because 12 is in the guided state and the thread signal e is present.

When the winding of the defective yarn 12 is completed, the yarn signal e from the sensor 18 is absent, and the yarn signal time measurement circuit 25 stops counting. Thereby, the actual winding time of the defective yarn is measured, and at the same time, the measuring time T ₀
Will be stored as On the other hand, when the yarn signal e is absent, the monitoring circuit 23 detects this and outputs an abnormal signal f to the winding control circuit 21, so that the winding device 14 is stopped, whereby the measuring time T ₀ The measurement ends. In addition,
When storing the temporarily measurement time T ₀ to the yarn signal time measuring circuit 25, the input of the yarn signal e to the yarn signal time measuring circuit 25 is not required.

In the above description, the measurement of the measurement time T ₀ is the case of single performs multiple measurements may be the measurement time T ₀ takes its average value.

Next, the winding time set value T ₁ and the monitoring time set value T
₂ is determined as follows based on the measured time T _D measured as described above.

(1) For the measurement time T ₀ , a predetermined margin time ΔT ₁ ,
Add and subtract ΔT ₂ to set.

T ₁ = T ₀ + ΔT ₁ T ₂ = T ₀ −ΔT ₂ The setting value calculation units 26 and 33 shown in FIG. 2 show the case of this setting.

(2) The measurement time T _0, set by the counting example 1.1 and 0.9 of the ratio determined in advance.

T ₁ = T ₀ × 1.1 T ₂ = T ₀ × 0.9 Here, the coefficient 1.1 or 0.9 is determined in consideration of the operation safety factor of the device.

As described above, each of the winding time setting value to the take-up time setting circuit 22 and the monitoring time setting circuit 24 T ₁ and monitoring time set value T ₂ is set.

Figure 3 is a time chart showing the relationship between measurement time T ₀ and the take-up time setting T ₁ and monitoring time set value T _2.

Now, at some point t _1, the horizontal blind signal a loom control device
Suppose that it is input to 19. Loom control device 19, the loom start the defective yarn removing device 11 is stopped, to begin repair of the defective yarn from the point t _1. When to the control device 20 at the next time t ₂ the winding start command c is issued, the winding time T _A is started counting at the time calculation unit 27 of the take-up time setting circuit 22. On the other hand, the monitoring time T _B is started counting at the time calculation unit 36 of the monitoring time setting circuit 24.

When the monitoring time T _B is equal to the set value T ₂ at time t _3,
The monitoring by the sensor 18 ends, and the sensor detection end command h is output from the monitoring time setting circuit 24.

In the present invention, the time required for winding the defective yarn 12, since using actual measurement time T _0, the winding of its end t ₄ to become the defective yarn 12 ends. The time ΔT _B of the difference between the measurement time T ₀ and the monitoring time set value T ₂ is the sensor detection invalid time. In the present invention, this time ΔT _B is the monitoring time set value based on the measurement time T _0. since it determined by defining a T _2, a suitable value.

Then, the time t ₅ when the winding time T _A is the set value T ₁
Therefore, the winding end command g is output from the winding time setting circuit 22. In this case, the winding time set value T ₁
The time ΔT _A of the difference between the measurement time T ₀ and the measurement time T ₀ is the idling time of the winding device. In the present invention, the time ΔT _A is the measurement time
Since the T ₀ on the basis determined by determining the winding time set value T _1, a suitable value.

If the type of yarn is one kind, or may be the configuration, when the shuttleless loom for weaving multi-colored, as shown in FIG. 4, the take-up time set value T ₁ and monitoring in accordance with the type of yarn configured to switch the time set value T _2.

FIG. 4 shows a block configuration of the control device 20 in the case of two-color weaving. The winding time setting circuit 22 and the monitoring time setting circuit 24 are provided according to the yarn types A and B, respectively. When, for example, the yarn A is selected by the weft selecting device 43, the switching circuit 44 and the switching circuit 45 use the winding time setting circuit 22A and the monitoring time setting circuit 24A.
Is selected, and each of these setting circuits 22A, set the winding time 24A set value T _1A and monitoring time on the basis of the set value T _2A, the motor for driving the winding device 13 in the take-up control circuit 21
Then, the monitoring circuit 23 monitors the yarn signal e of the defective yarn from the sensor 18. The same applies when the yarn B is selected.

Here, the yarn signal time measuring circuit 25 is provided with a memory 42 according to the number of yarn types, and the measuring time T ₀ according to each yarn.
Are stored separately in advance.

According to the present invention, the winding time and the monitoring time are switched according to the yarn type during a series of weaving in conjunction with the weft yarn selection device, so that the repair period can be shortened and the appropriate time according to the yarn type. Monitoring can be performed, which improves the utilization rate of the loom.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a defective yarn automatic repair control device of the present invention, FIG. 2 is a block diagram showing a part of the control device of the present invention in detail, and FIG. 3 explains the operation of the present invention. FIG. 4 is a block diagram of the control device of the present invention in the case of two-color weaving. 11 ... defective yarn removing device, 12 ... defective yarn, 13 ... winding device, 21 ... winding control circuit, 22 ... winding time setting circuit, 23 ... monitoring circuit, 24 ... monitoring time setting circuit.

Claims (1)

(57) [Claims] 1. A winding control circuit for controlling a winding time of a defective yarn in a winding device for removing a defective yarn when a weft insertion defect is detected in a shuttleless loom of a multicolor weave; A monitoring circuit for monitoring a yarn signal from a sensor for detecting whether or not the yarn is being guided to the winding device; and a monitoring circuit provided according to the type of the weft yarn, and the winding time corresponding to the type of the weft yarn is set. A plurality of winding time setting circuits provided in accordance with the type of the weft thread, and a plurality of monitoring time setting circuits each provided with a monitoring time setting value of the yarn signal corresponding to the type of the weft thread; and A first switching circuit having a side connected to the plurality of winding time setting circuits and a weft selecting device for multicolor weaving, and an output side connected to the winding control circuit; A second switching circuit connected to the path and the weft selecting device and having an output side connected to the monitoring circuit, wherein the first switching circuit and the second switching circuit respond to a selection signal from the weft selecting device. A corresponding winding time setting circuit and monitoring time setting circuit are selected, and the winding control circuit and the monitoring circuit of the shuttleless loom operating based on the set values of the selected winding time setting circuit and monitoring time setting circuit. Automatic defect repair control device.