JPH09105053A - Control of weaving abnormality detection in weaving machine and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability of an operation for nullifying the detection function of a weaving abnormality detecting means. SOLUTION: A weaving abnormality detecting control device C2 comprises a nullifying circuit 29 connected to both a weaving machine controlling computer C1 and a warp end breakage detector 28 by a signal, a canceling switch 30 connected to both a rotary encoder 26 and the nullifying circuit 29 by a signal, a nullifying switch 31 connected to the nullifying circuit 29 and an effectuating switch 32. The rotary encoder 26 outputs a starting point signal to the canceling circuit 30 at every weft inserting. When the number of input times of the starting point signals showing the number Nx of weft inserting times reaches a fixed number No of weft inserting times, the canceling circuit 30 outputs a nullifying signal to the nullifying circuit 29 to become a nullifying means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weaving abnormality detection control method and apparatus in a loom equipped with weaving abnormality detecting means for detecting a weaving abnormality and outputting a weaving abnormality detection signal.

[0002]

2. Description of the Related Art Generally, a loom is equipped with a warp breakage detecting device for detecting warp breakage. In this type of detection device, a dropper suspended and supported by a warp falls along with the cutting of the warp, and an electric signal is output according to this drop. The output of this electric signal makes it possible to grasp the warp breakage. However, when the warp beam in the warp beam is consumed and a new warp beam is mounted on the loom and a new weaving operation is started, the tensions of the individual warp yarns are often not uniform. When the tension of the warp is weak, the dropper is in a dropped state even though the yarn is not broken, and an electric signal is output. The weaving is immediately stopped when the electric signal for detecting the yarn breakage is output. Therefore, as disclosed in Japanese Patent Laid-Open No. 57-176243, it is necessary to cut off the signal cable connected to the warp cutting detecting device at the start of new weaving.

[0003]

The disconnection on the signal cable is performed by removing the connector, and the connector is connected after the weaving progresses to such an extent that the tensions of the individual warp threads are uniform. However, in the work of removing and connecting such a connector, the operator must be on the side of the loom during this time, which is troublesome and time consuming.

Further, the jet loom is equipped with a weft detector for detecting the arrival or non-arrival of the weft inserted, but the weft inserted is caught on the warp due to insufficient warp tension at the start of new weaving. It is easy to make a weft insertion error. Therefore, although a measure to cut off the signal cable connected to the weft yarn detector is taken, this work is also troublesome.

An object of the present invention is to improve the workability of the work of invalidating the detection function of the weaving abnormality detecting means such as the warp cutting detecting device and the weft detecting device.

[0006]

To this end, the present invention is directed to a weaving machine equipped with weaving abnormality detecting means for detecting a weaving abnormality and outputting a weaving abnormality detection signal. After disabling the function of the abnormality detecting means, the function is automatically enabled after a predetermined weaving process.

According to the second aspect of the present invention, after the function of the weaving abnormality detecting means is invalidated, the weaving is started by turning on the start switch, and the validating of the function is automatically performed after a predetermined weaving progress. I chose

According to the third aspect of the invention, the function of the weaving abnormality detecting means is invalidated and validated by invalidating and validating the weaving abnormality detection signal. In the invention of claim 4, the weaving abnormality detecting means is a weft detector that detects whether or not the weft inserted in the jet loom has arrived. When the weaving abnormality detection signal is invalid, the weft detector continues to detect 2 Weaving was stopped when the detection signal of the number of times was output.

According to a fifth aspect of the present invention, there is provided a mode for invalidating the function of the weaving abnormality detecting means, and a weaving progress amount detecting means for detecting the weaving progress amount with switching to the invalidation mode of the invalidating means. And a weaving abnormality detection control device including a canceling unit that cancels the invalidation mode in the invalidating unit when the weaving progress amount detected by the weaving progress amount detection unit reaches a preset weaving progress amount. did.

In the invention of claim 6, the function of the weaving abnormality detecting means in claim 5 is invalidated and validated by invalidating and validating the weaving abnormality detection signal.
According to the invention of claim 7, a weaving abnormality detection control device is provided with a selection switch circuit for selecting either invalidation or activation, and the mode of the invalidation means is selected by selecting one of the selection switch circuits. I decided to make a decision.

According to the first and fifth aspects of the invention, in the invalidation mode for invalidating the function of the weaving abnormality detecting means,
Weaving does not stop due to the occurrence of a weaving abnormality that is the detection target of the weaving abnormality detecting means. When the weaving progress amount after the invalidation mode reaches a predetermined weaving progress amount, the invalidation mode is automatically canceled and the function of the weaving abnormality detecting means is enabled. After the activation mode is entered, the weaving abnormality is detected by the weaving abnormality detecting means, and the weaving is stopped. Disabling the function of the weaving abnormality detection means includes disabling the output weaving abnormality detection signal, disabling the output function of the weaving abnormality detection signal, and stopping the power supply to the weaving abnormality detection means.

According to the second aspect of the present invention, when the weaving progress amount after the start of weaving reaches the predetermined weaving progress amount before the activation switch is turned on and the weaving progress amount reaches a predetermined weaving progress amount, the invalidation mode is automatically canceled. Done in.

According to the third and sixth aspects of the present invention, the function of the weaving abnormality detecting means is invalidated by invalidating the weaving abnormality detecting signal output from the weaving abnormality detecting means.
According to the invention of claim 4, when the weft detector, which is a kind of weaving abnormality detecting means, continuously outputs the weaving abnormality detection signal twice, the weaving is stopped regardless of the invalidation mode. When the weaving abnormality detection signal is output twice in succession, there is a yarn feeding error on the yarn feeding route from the weft cheese to the weft inserting main nozzle, for example.

According to the invention of claim 7, when the weaving is started, the operation for selecting either the invalidation mode or the activation mode is performed through the control switch circuit. This selection is made, for example, when the weaving is restarted after the weaving is stopped due to the weaving abnormality.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 schematically shows a side view of the entire loom.
M is a loom drive motor, and the loom drive motor M is controlled by the loom control computer C1. Reference numeral 11 denotes a feed motor that can rotate forward and reverse independently of the loom drive motor M. The feed motor 11 drives the warp beam 12. The warp T sent out from the warp beam 12 passes through the back roller 13 and the tension roller 14 to the heald 1.
5 and reed 16. The woven cloth W is wound around the cross roller 21 via the expansion bar 17, the surface roller 18, the press roller 19 and the wrinkle guide member 20.

The tension roller 14 is attached to one end of the tension lever 22, and a predetermined tension is applied to the warp T by a tension spring 23 attached to the other end of the tension lever 22. Tension lever 2
2 is rotatably supported at one end of a detection lever 24, and a load cell 25 is connected to the other end of the detection lever 24. The warp tension is applied to the load cell 2 via the tension roller 14, the tension lever 22 and the detection lever 24.
5, the load cell 25 outputs an electric signal corresponding to the warp tension to the loom control computer C1.

The loom control computer C1 compares the preset tension with the detected tension grasped by the input signal, and determines the warp beam diameter grasped by the detection signal from the rotary encoder 26 for detecting the machine base rotation angle. Based on this, the rotation speed of the delivery motor 11 is controlled. The warp tension during the normal operation is controlled by this rotation speed control, so that weaving step generation during weaving is prevented.

The loom control computer C1 commands a forward rotation operation of the feed motor 11 by an ON signal from the start switch 27, and the feed motor 11 is driven based on a rotation speed detection signal from a rotary encoder 111 incorporated in the feed motor 11. Feedback control the rotation speed.

A warp cutting detector 28 is provided on the warp path after the tension roller 14. The warp cutting detection device 28 detects the cutting of the warp T. When the warp yarn T is cut, the dropper 281 drops, and the drop causes the warp yarn cutting detection device 28 to output a warp yarn cutting detection signal, which is a weaving abnormality detection signal, to the weaving abnormality detection control device C2.

The weaving abnormality detection control device C2 includes an invalidation circuit 29 signal-connected to the loom control computer C1 and the warp cutting detection device 28, a rotary encoder 26 and a cancellation circuit 30 signal-connected to the invalidation circuit 29.
It comprises an invalidation switch 31 and an activation switch 32 which are signal-connected to the invalidation circuit 29. A predetermined number of weft insertion times No is input and set by the input device 33 to the canceling circuit 30 serving as canceling means. The rotary encoder 26 cancels the origin signal every time weft insertion is performed.
The cancellation circuit 30 compares the input number Nx of the origin signal indicating the number of weft insertions with the predetermined number of weft insertions No. When the detected number of weft insertions Nx reaches a predetermined number of weft insertions No, the canceling circuit 30 outputs a canceling signal to the invalidating circuit 29 serving as invalidating means. The invalidation switch 31 and the validation switch 32 form a selection switch circuit.

FIG. 2 is a flow chart showing a weaving abnormality detection control program by the loom control computer C1 and the weaving abnormality detection control device C2. When the weaving is newly started after the warp beam 12 is replaced, the disabling switch 31 is turned on.
N is operated. The invalidation circuit 29 selects the invalidation mode by the output of the invalidation signal accompanying the ON operation of the invalidation switch 31. After selecting the disabling mode, start switch 27
When is turned on, the loom control computer C1 commands the start of weaving. When the detected number of weft insertions Nx after the start of weaving reaches the set number of weft insertions No, the canceling circuit 30 outputs a canceling signal to the invalidating circuit 29. The invalidation circuit 29 shifts from the invalidation mode to the validation mode in response to the input of the cancel signal.

When warp breakage occurs, the warp breakage detection device 28 outputs a warp breakage detection signal to the invalidation circuit 29. When the invalidation circuit 29 is in the valid mode, the invalidation circuit 29 outputs a weaving stop signal to the loom control computer C1 in response to the input of the warp cutting detection signal. The loom control computer C1 issues a weaving stop command in response to the input of the weaving stop signal. When the invalidation circuit 29 is in the invalidation mode, the invalidation circuit 29 invalidates the input warp cutting detection signal and does not output the weaving stop signal.

Immediately after the warp beam 12 is exchanged, the tensions of the individual warp threads T are often not uniform, and the dropper 281 suspended on the warp threads T having too low tension is in the same falling state as in the case of thread breakage. . If the warp cutting detection is performed in such a state, an unnecessary weaving stop will occur. In this embodiment, the warp cutting detection signal that is output is invalidated while the weft insertion number Nx after the new warp beam replacement has not reached the set weft insertion number No. The set weft insertion number No is set to about the number of weft insertions during the weaving state until the tensions of the individual warp threads T are equalized, and weaving stop due to insufficient tension of the warp threads after the start of new weaving does not occur. . Therefore, erroneous detection of warp breakage at the start of weaving after a new warp beam replacement can be avoided without the troublesome work of shutting off the signal cable in the warp cutting detection device, and unnecessary weaving stop can be avoided. It

After a weaving stop for some reason,
When the weaving is restarted, the validation switch 32 is turned on. Deactivating circuit 2 by turning ON the enabling switch 32
9 enters enable mode.

When the weaving is resumed, the tensions of the individual warps are equalized, and it is not necessary to invalidate the warp cutting detection signal. Therefore, when the weaving is restarted, the enabling switch 32 is turned off.
It is necessary to perform N operations to select the activation mode. The presence of the selection switch circuit including the invalidation switch 31 and the validation switch 32 is convenient for ensuring the validation of the function of the warp cutting detection device 28 when the weaving is restarted.

Next, a second embodiment shown in FIGS. 3 and 4 will be described. The same components as those in the first embodiment are denoted by the same reference numerals. In this embodiment, the jet loom is targeted. Reference numeral 34 denotes a winding type weft measuring and storing device.
The thread winding tube 341 is driven to rotate by a winding motor 342, and the weft Y is wound around the thread winding surface 343 by this rotation driving. The weft Y measured and stored by the weft measurement storage device 34 is injected from the weft insertion main nozzle 35,
It is inherited to the relay injection of the plurality of weft insertion auxiliary nozzles 36. A weft yarn detector 37 is installed at the weft insertion end, and the weft yarn detector 37 obtains information for determining whether or not the front end of the weft yarn Y has arrived.

Locking pins 38 are used to unwind and prevent the weft from being pulled out from the bobbin winding surface 343 of the weft measuring and storing device 34.
This is done by exciting and demagnetizing the electromagnetic solenoid 38 for driving 1. The excitation / demagnetization control of the electromagnetic solenoid 38 is performed by a command from the loom control computer C1, and the loom control computer C1 controls the excitation / demagnetization of the electromagnetic solenoid 38 based on the loom rotation angle detection information obtained from the rotary encoder 26. Further, the loom control computer C1 controls the operation of the winding motor 342.

The weft yarn Y unwound and unwound from the yarn winding surface 343 is detected by the weft yarn unwinding detector 39. When the number of unwinding detection from the weft unwinding detector 39 reaches a set number, the loom control computer C1 commands demagnetization of the electromagnetic solenoid 38, and the locking pin 381 engages with the thread winding surface 343 to unwind the weft unwinding. Prevent.

The weft-insertion pressure air jet from the weft-insertion main nozzle 35 is controlled by the demagnetization of the electromagnetic opening / closing valve 40.
The pressure air injection in the weft inserting auxiliary nozzle 36 is controlled by the excitation / demagnetization of the electromagnetic opening / closing valve 41. Each solenoid on-off valve 4
The excitation / demagnetization control of 0 and 41 is performed by a command from the loom control computer C1.

The weft yarn Y which has been normally inserted is cut by the electromagnetic cutter 42, and the subsequent weft insertion is continued. The electromagnetic cutter 42 is subjected to excitation / demagnetization control by the loom control computer C1, and the loom control computer C1 determines the electromagnetic cutter 42 for each weft insertion based on the yarn presence / absence information from the weft yarn detector 37.
Excitation and demagnetization are controlled. When a weft insertion error occurs, the loom control computer C1 immediately stops the operation of the loom drive motor M and the excitation / demagnetization control of the electromagnetic cutter 42, and the weft yarn Y1 having the weft insertion error and the succeeding weft yarn Y2 are cut. Stay connected without having to. The miss yarn Y1 is removed from the inside of the warp opening by a weft processing device (not shown) using the succeeding weft Y2 as a clue.

The weft detector 37 detects whether or not the weft has arrived, and if a weft insertion error that the weft does not arrive occurs, the weft detector 37 outputs a weft insertion error detection signal which is a weaving abnormality detection signal. Is output to the invalidation circuit 29.

FIG. 4 is a flow chart showing a weaving abnormality detection control program by the weaving machine control computer C1 and the weaving abnormality detection control device C2. The weft insertion error detection signal output while the weft insertion number Nx after the warp beam replacement does not reach the set weft insertion number No is invalidated. Therefore,
Set weft insertion count N from the start of weaving after warp beam replacement
The weaving stop is not performed by the output of the weft insertion error detection signal until o.

Due to uneven warp tension after the warp beam replacement, adjacent warp yarns may be entangled with each other, and weft-inserted weft yarns may be caught on the entangled warp yarns. However, since the woven cloth portion in the woven state after the start of new weaving is not used as a cloth product, the cloth defect in the woven portion can be ignored. Therefore, during weaving of the woven portion, even if the weft insertion error detection signal is invalidated and weaving is continued, no trouble occurs. Continuation of such weaving is convenient for increasing the operation rate of the loom.

Next, a third embodiment of FIG. 5 will be described. The device configuration is the same as that of the second embodiment. When the weft detector 37 outputs the weft insertion error detection signal twice in succession as shown in the flowchart of FIG. 5, the invalidation circuit 29 outputs the weaving stop signal even when the invalidation circuit 29 is in the invalidation mode. Is output to the loom control computer C1. As a case where weft insertion errors occur twice in succession, there is, for example, a yarn supply error to the weft insertion main nozzle 35. It is necessary to stop weaving when such a yarn feeding error occurs. In this embodiment, weaving abnormality detection control can be performed in response to the occurrence of yarn feeding error.

Next, a fourth embodiment shown in FIGS. 6 and 7 will be described. The same components as those in the first and second embodiments are designated by the same reference numerals. In this embodiment, the number of weft insertions Nx after the start of new weaving is the set number of weft insertions N
Before reaching o, both the functions of the warp cutting detection device 28 and the functions of the weft detector 37 are invalidated. Therefore, the same effects as those of the first and second embodiments can be obtained.

Next, a fifth embodiment shown in FIGS. 8 and 9 will be described. The same components as those in the second embodiment are denoted by the same reference numerals. In this embodiment, the sensor head 43
Are attached to the endless belt 44, and the endless belt 44 is reciprocally driven by a motor 45. As the endless belt 44 reciprocates, the sensor head 43 reciprocates above the woven fabric W in the weaving width direction. The sensor head 43 projects light onto the woven cloth W, picks up the reflected light, and determines the presence or absence of a defect on the woven cloth W based on the intensity of the reflected light.
When there is a defect on the woven cloth W, the sensor head 43 outputs a defect detection signal which is a weaving abnormality detection signal to the invalidation circuit 29.

While the number of weft insertions Nx after the start of new weaving does not reach the set number of weft insertions No, the invalidation circuit 29 invalidates the defect detection signal. It can be said that the cloth of the woven portion is full of defects, and the inspection of such a cloth portion is meaningless. According to this embodiment, it is possible to avoid stopping the weaving due to detection of meaningless cloth defects such as inspection of the woven portion.

Note that an embodiment in which the reciprocating operation of the sensor head 43 is not performed in the invalidation mode is also possible. In each of the above embodiments, the weaving abnormality detection signals such as the warp cutting detection signal, the weft insertion error detection signal, and the defect detection signal that have been output are invalidated, but the number of weft insertions after the start of a new weaving operation is set. An embodiment is also possible in which the weaving abnormality detection signal is not output before the number of times is reached. The sixth embodiment of FIGS. 10 and 11 is an example of an embodiment in which the weaving abnormality detection signal is not output. The same components as those in the first embodiment are denoted by the same reference numerals.

In this embodiment, the warp cutting detection device 28
The warp breakage detection signal output from the open / close switch circuit 4
6 to the loom control computer C1. The loom control computer C1 commands the stop of weaving in response to the input of the warp cutting detection signal. The invalidation circuit 47, which constitutes the weaving abnormality detection control device C2, controls the opening / closing of the opening / closing switch circuit 46. As shown in the flowchart of FIG. 11, the invalidation circuit 47 opens and closes the open / close switch circuit 46 while the weft insertion number Nx after the start of new weaving does not reach the set weft insertion number No.
Is opened. When the new weaving insertion number Nx reaches the set weft insertion number No, the invalidation circuit 47 closes the open / close switch circuit 46. Therefore, in the weaving state, the warp cutting detection signal is not output to the loom control computer C1 and the same effect as that of the first embodiment can be obtained.

The function of the weaving abnormality detecting means can be invalidated by stopping the power supply to the weaving abnormality detecting means in addition to the above-described embodiment. Inventions other than those described in the claims grasped from the above-described embodiment will be described below along with their effects. (1) In a loom equipped with a weaving abnormality detecting means for outputting a weaving abnormality detecting signal, after prohibiting the output of the weaving abnormality detecting signal from the weaving abnormality detecting means, the weaving abnormality detecting means outputs the weaving abnormality detecting means. Weaving abnormality detection selection method in a loom that allows the output of the weaving abnormality detection signal of

The same effect as the first embodiment can be obtained.
The effects of the embodiment will be described below. (1) In the embodiment employing the selection switch circuit including the invalidation switch 31 and the validation switch 32, it is convenient for ensuring the validation of the function of the warp cutting detection device 28 when the weaving is restarted. (2) Even when the invalidation circuit 29 is in the invalidation mode,
In the embodiment in which the weaving is stopped when the weft detector 37 outputs the weft insertion error detection signal twice in succession, the weaving abnormality detection control can be performed in response to the occurrence of the yarn feeding error.

[0043]

As described above in detail, after the function of the weaving abnormality detecting means is invalidated, the function of the weaving abnormality detecting means is automatically enabled after the predetermined weaving progress. It has an excellent effect that switching from invalidation to validation can be automatically performed without relying on human hands.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment.

FIG. 2 is a flowchart showing a weaving abnormality detection control program.

FIG. 3 is a front view showing a second embodiment.

FIG. 4 is a flowchart showing a weaving abnormality detection control program.

FIG. 5 is a flowchart showing a weaving abnormality detection control program according to the third embodiment.

FIG. 6 is a side view showing a fourth embodiment.

FIG. 7 is a flowchart showing a weaving abnormality detection control program.

FIG. 8 is a front view showing a fifth embodiment.

FIG. 9 is a flowchart showing a weaving abnormality detection control program.

FIG. 10 is a side view showing a sixth embodiment.

FIG. 11 is a flowchart showing a weaving abnormality detection control program.

[Explanation of symbols]

26 ... A rotary encoder serving as a weaving progress amount detecting means,
28 ... Warp cutting detection device which is weaving abnormality detection means, 29
... invalidating circuit that serves as invalidating means, 30 ... canceling circuit that serves as canceling means, 31 ... invalidating switch that constitutes the selection switch circuit, 32 ... enabling switch that constitutes the selection switch circuit, 37 ... weaving abnormality detecting means Weft yarn detector 43, sensor head 47 serving as weaving abnormality detection means
... Invalidation circuit serving as invalidation means, C2 ... Weaving abnormality detection control device.

Claims (7)

[Claims] 1. A weaving machine having a weaving abnormality detecting means for detecting a weaving abnormality and outputting a weaving abnormality detection signal, wherein the function of the weaving abnormality detecting means is disabled, and then the function is performed after a predetermined weaving progress. A weaving abnormality detection control method for a loom that is automatically enabled. 2. The weaving abnormality detecting means is disabled, the weaving is started by turning on a start switch, and the function is automatically validated after a predetermined weaving progress.
A weaving abnormality detection control method for a loom according to. 3. The weaving in the loom according to claim 1, wherein the function of the weaving abnormality detecting means is invalidated and validated by invalidating and validating a weaving abnormality detection signal. Anomaly detection control method. 4. The weaving abnormality detecting means is a weft detector that detects whether or not the weft inserted in the jet loom has arrived, and the weft yarn detector detects the weaving abnormality detection signal twice in succession. The weaving abnormality detection control method for a loom according to claim 3, wherein the weaving is stopped when the weaving abnormality detection signal is output. 5. A weaving machine provided with a weaving abnormality detecting means for detecting a weaving abnormality and outputting a weaving abnormality detecting signal, wherein a weaving abnormality detecting means has a disabling mode for disabling the function and a enabling function for enabling the function. A disabling means for taking any one of the modes, a weaving progress amount detecting means for detecting a weaving progress amount along with the switching of the invalidating means to the invalidation mode, and a weaving detected by the weaving progress amount detecting means. A weaving abnormality detection control device for a loom, comprising: a canceling unit that cancels the invalidation mode of the invalidating unit when the amount of progress reaches a preset amount of weaving. 6. The weaving abnormality detection control device for a loom according to claim 5, wherein the function of the weaving abnormality detecting means is invalidated and validated by invalidating and validating a weaving abnormality detection signal. 7. The method according to claim 5, further comprising a control switch circuit for selecting either invalidation or validation, and determining the mode of the invalidation means by selecting one of the selection switch circuits. 2. A weaving abnormality detection control device for a loom according to item 1.