JPH07126963A - Method for detecting mispick in pile fabric loom - Google Patents

Abstract

PURPOSE:To avoid stopping a loom due to the occurrence of mispick which can be overlooked. CONSTITUTION:This method for detecting mispick in a pile fabric loom is to carry out the terry motion of an expansion bar 6 for guiding a woven fabric (W) by the operation of a servo motor 22, detect the presence of the occurrence of the mispick in weft yarn jetted from a picking main nozzle 28 with a weft yarn detector 40, stop the operation of a driving motor (M) of the loom with a loom controlling computer (C0) when the input of a detected mispick signal outputted from the weft yarn detector 40 is continuously detected in two picking cycles and continue the operation of the loom driving motor (M) when the input is not continuously detected in the two picking cycles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft insertion error detecting method in a pile loom which forms a pile by changing the relative distance between the reed hitting position of the reed and the cloth fell position.

[0002]

2. Description of the Related Art In a weaving machine, a weft detector for detecting whether or not a weft is properly inserted is used as a weft insertion error detection device, and weaving is stopped when the weft insertion error detection device detects a weft insertion error. To be done. The pile weaving machine also performs the same weft insertion error detection, and when weft insertion abnormality is detected, weaving is stopped. Even if weaving is stopped, the weft thread that has been miss-inserted is struck in the front of the woven cloth, and therefore the work of removing the mis-weft insertion from the front cloth of the woven cloth is performed.

[0003]

Since a weft insertion error during pile formation in a pile loom directly affects pile formation, when a weft insertion error occurs during pile formation, weaving is stopped and the weft insertion error weft yarn is formed. Must be removed from the front of the woven fabric. On the other hand, depending on the type of fabric, it may be possible to overlook a weft insertion error at the border portion. In such a case, if the weft insertion error occurs, the weaving machine operating rate improves if weaving is continued. However, in a jet loom, for example, a weft insertion error in the case where the main nozzle for weft insertion causes a yarn clogging cannot be overlooked.

An object of the present invention is to improve the operating rate of a loom by determining whether or not to stop weaving according to the occurrence of weft insertion errors in the pile loom.

[0005]

To this end, the present invention changes the relative distance between the beating position of the reed and the front position of the woven fabric to form a pile, and when a weft insertion error occurs, the weft insertion is performed. A pile loom equipped with a weft insertion error detection device that outputs a weft insertion error detection signal is targeted. In the invention according to claim 1, weaving is performed when the weft insertion error detection signal is output during weaving of a pile weave pattern. When the weaving of the border weave pattern is stopped, the weft insertion error detection signal is at least the weft insertion 2
The weaving was stopped when the output was output continuously in cycles.

In the invention of claim 2, weaving is stopped when the weft insertion error detection signal is output during the weaving of the pile weave pattern, and the weft insertion error detection signal indicates the same color weft when the weaving of the border weave pattern is performed. Regarding the weft insertion, the weaving was stopped when at least two weft insertion cycles were output in succession.

[0007]

According to the first aspect of the present invention, when weft insertion errors occur consecutively during the formation of a border, the weft insertion errors are considered to occur after the preset number of weft insertion cycles, and the weaving is stopped. Is done. The weaving is stopped even when the weft insertion error during pile formation is only one cycle of weft insertion.

In the invention according to claim 2, when weft insertion of the same color weft occurs at the time of border formation, when a weft insertion error occurs continuously for a preset number of weft insertion cycles, the same weft insertion of the same color weft is performed thereafter. Weaving is halted on the assumption that mistakes will occur. The weaving is stopped even when the weft insertion error during pile formation is only one cycle of weft insertion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a jet loom will be described below with reference to FIGS.

FIG. 1 shows a side surface of the entire loom, and 1 is a warp beam for a plain weave. The ground warp T fed from the warp beam 1 for plain weave by the operation of a feed motor (not shown)
Is passed through the heddle 4 and the deformed reed 5 through the back roller 2 and the tension roller 3. The woven cloth W is passed through the expansion bar 6, which is a terry motion member, the surface roller 7, and the guide rollers 8 and 9, and the cross roller 1
It is wound up to 0.

A pile warp beam 11 is supported above the ground warp beam 1. The pile warp yarn Tp sent out from the pile warp beam 11 by the operation of a sending motor (not shown) is passed through the heddle 4 and the deformed reed 5 through the tension roller 12.

At the center of the front and rear of the loom, a three-pronged intermediate lever 13 is arranged so as to be rotatable around a support shaft 13a.
A support lever 14 is arranged at the rear of the loom so as to be rotatable around a support shaft 14a, and a tension roller 12 is supported by the support lever 14. The support lever 14 and the intermediate lever 13 are connected by a rod 15. A support lever 16 is provided at the front of the loom so as to be rotatable around a support shaft 16a, and the expansion lever 6 is supported by the support lever 16. The support lever 16 and the intermediate lever 13 are connected by a rod 17.

A positive cam type terry motion cam 20 and a worm wheel 21 are fixed to the drive shaft 19 above the intermediate lever 13. A servo motor 22 is arranged near the drive shaft 19 and the drive worm 22
a meshes with the worm wheel 21. The servo motor 22 rotates in one direction, and the terry motion cam 20 rotates in one direction. Servo motor 22 is subjected to operation control of the control computer C _1, the control computer C ₁ operates controls the servo motor 22 on the basis of the pile weave pattern.

This embodiment is premised on the weaving of the three weft towel design shown in FIGS. 4 (a) and 4 (b). Y ₁ is a first pick weft, and Y ₂ and Y ₃ are loose pick wefts. P indicates a beating position. Wb is a border.

A cam lever 23 is swingably supported by a support shaft 23a immediately above the drive shaft 19. A bifurcated displacement direction conversion lever 24 is disposed laterally of the cam lever 23 so as to be rotatable around a support shaft 24a. The displacement direction changing lever 24 and the cam lever 23 are connected by a link 25. Displacement direction change lever 24 and intermediate lever 1
3 is connected by a rod 26. Therefore, the swing displacement of the cam lever 23 due to the rotation of the terry motion cam 20 causes the link 25, the displacement direction changing lever 24, the rod 26, the intermediate lever 13, the rod 17, and the support lever 16.
Is transmitted to the expansion bar 6 via. Due to this displacement transmission, the expansion bar 6 is rotationally displaced about the support shaft 16a. The swing displacement of the cam lever 23 is transmitted to the tension roller 12 via the intermediate lever 13, the rod 15 and the support lever 14. By this displacement transmission, the support levers 14 and 16 rotate in the same direction, and the tension roller 12 and the expansion bar 6 are displaced in the same direction by the same amount. Therefore, the path of the pile warp threads Tp and the path of the woven cloth W are displaced, and the cloth fell W ₁ of the woven cloth W is displaced.

A weft processing device 27 is installed on the side of the cloth fell W ₁ of the woven cloth W. A weft processing device 2 based on FIG.
7 will be described. A weft-insertion prevention nozzle 29 is installed directly below the weft-insertion main nozzle 28, and a weft-introducing duct 30 is installed directly above it. Weft introduction duct 3
A suction pipe 31 is installed behind the 0 exit,
The outlet side of the suction pipe 31 is curved toward a dust box (not shown), and a blow nozzle 32 is connected to this curved portion.

The weft insertion main nozzle 28, the weft insertion prevention nozzle 29, the weft introduction duct 30, and the suction pipe 31 are all mounted on a sley, and they integrally swing as the sley swings. Each of these members 28, 29, 3
A weft take-up motor 33 is provided in the rear of the swing region of 0, 31.
Is installed, and an air cylinder 34 is installed above it. A drive roller 35 is operatively connected to the weft take-up motor 33, and a driven roller 36 is attached to a drive rod of the air cylinder 34. The driven roller 36 is pressed against the drive roller 35 by the protruding operation of the air cylinder 34.

A limit switch type weft yarn detector 37 is attached to the drive rod of the air cylinder 34.
The detection needle 37a of the weft yarn detector 37 sweeps through the region between the weft yarn introduction duct 30 and the suction pipe 31 as the air cylinder 34 projects.

The nozzles 28, 29, 32 are all connected to a pressure air supply tank (not shown) via two-way valve type electromagnetic valves V ₁ , V ₂ , V ₃ . The air cylinder 34 is connected to the pressurized air supply tank via a three-way valve type electromagnetic valve V ₄ . Weft insertion main nozzle 2
An electromagnetic cutter 38 is arranged between the injection port 8 and the inlet of the weft introduction duct 29. An electromagnetic cutter 39 is arranged near the side of the cloth fell W ₁ . The electromagnetic cutter 39 cuts and separates the repulsed weft yarn from the weft-insertion main nozzle 28 every weft-insertion cycle.

The electromagnetic cutter 38, the electromagnetic valves V _{2 to} V ₄ and the weft take-up motor 3 constituting the weft processing device 27.
3 receives the command control of the loom control computer C ₀ together with the electromagnetic valve V ₁ and the electromagnetic cutter 39. That is, the weft processing device 27 receives the operation control of the loom control computer C ₀ . The loom control computer C ₀ is connected pile weave pattern device 18, the loom control computer C ₀
Reads out the pile weave pattern from the pile weave pattern device 18 and sends it to the control computer C ₁ .

A weft detector 40, which serves as a weft insertion error detection device, is installed on the weft insertion end side. When the weft insertion is normally performed, the tip of the weft Y reaches the installation position of the weft detection device 40. To reach. When the tip of the weft Y does not reach the installation position of the weft detector 40, a weft insertion error detection signal is output to the loom control computer C ₀ . The loom control computer C ₀ determines whether or not a weft insertion error detection signal is input from the weft detector 40 within a predetermined period of one weft insertion cycle.

FIG. 5 is a flow chart showing a weaving stop control program when a weft insertion error occurs, and the loom control computer C ₀ executes the weaving stop control according to this program.

When weaving a pile weave pattern, the weft detector 4
When 0 outputs the weft insertion error detection signal, the loom control computer C ₀ determines that the weft insertion is abnormal, and the loom drive motor M,
The excitation / demagnetization control of the electromagnetic valve V ₁ and the opening / closing control of the electromagnetic cutter 39 are stopped, and the alarm device 41 is activated. The machine stand stops at the crank angle position immediately before the beating. The defective weft yarn Y ₀ is woven into the cloth fell W ₁ of the woven fabric W as shown in FIG.

When the defective weft Y ₀ is the loose pick weft Y ₂ or Y ₃ , the defective weft Y ₀ is manually removed from the warp shed. Defective weft Y ₀ is the first pick weft Y
_When it is ₁ , the first pick weft Y ₁ and the loose pick wefts Y ₃ , Y ₂ are manually removed from the warp shed.

When the weft yarn detector 40 outputs a weft insertion error detection signal during the weaving of the border weave pattern, the loom control computer C ₀ adds and counts this input detection. When the weft insertion error detection signal is input also in the next weft insertion cycle, the loom control computer C ₀ counts the detected count value n up to the previous weft insertion cycle by adding one input detection this time. When the input of the weft insertion error detection signal is not detected in this weft insertion cycle, the detection count value n up to the previous weft insertion cycle is cleared to zero.

When the detected count value n does not reach the preset value N, the loom control computer C ₀ does not command the weaving stop and the weft processing operation of the weft processing device 27. The set value N is input and set by the input device 42, and in this embodiment, N = 2. When the detected count value n reaches a preset value N, the loom control computer C ₀ commands the weaving stop. The loom drive motor M reverses a predetermined amount after stopping. By this reversal, the maximum opening of the warp is formed.

The weaving machine control computer C ₀ controls the weft processing operation of the weft processing apparatus 27 as well as stopping the weaving. First, the electromagnetic valves V ₂ and V ₃ are excited. Electromagnetic valve V ₂
The weft-insertion-preventing nozzle 29 ejects when the magnetic field is excited, and the blow nozzle 32 ejects when the electromagnetic valve V ₃ is excited. The weft inserting main nozzle 28 is a weft Y that follows the defective weft Y _0.
Inject f for 1 pick and stop the injection. The trailing weft Yf is introduced into the weft introduction duct 30 by the jetting action of the weft insertion prevention nozzle 29.

The crank angle position when the warp yarn is in the maximum opening formation position is the angular position where the sley retracts to the last retracted position, and the region between the weft yarn introducing duct 30 and the suction pipe 31 is the gripping region of the rollers 35 and 36. Overlap. The succeeding weft yarn Yf passes through the gripping regions of the rollers 35 and 36 and reaches the inside of the suction pipe 31. Next, the air cylinder 34 is projected by the excitation of the electromagnetic valve V ₄ , and the driven roller 36 is brought into pressure contact with the drive roller 35. By this pressure contact, the succeeding weft Yf is clamped between the rollers 35 and 36.

The jet of the blow nozzle 32 acts on the succeeding weft yarn Yf in the suction pipe 31, and the rollers 35 and 36.
Tension is applied to the succeeding weft yarn Yf between the suction pipe 31 and the suction pipe 31. The detection needle 37a of the weft detector 37 contacts the tensioned subsequent weft Yf, and the weft detector 37 is turned on.
To do. When the weft yarn detector 37 is turned on, the electromagnetic valve V ₂ is demagnetized and the weft insertion preventing nozzle 29 stops jetting. Then, the electromagnetic cutter 39 is operated, and the succeeding weft Yf is cut and separated between the jet port of the weft insertion main nozzle 28 and the inlet of the weft introduction duct 30.

After the operation of the electromagnetic cutter 39, the weft take-up motor 33 is operated. The succeeding weft yarn Yf cut and separated from the weft insertion main nozzle 28 is the weft take-up motor 33.
Is taken to the suction pipe 31 side. Due to this take-up action, the defective weft yarn Y ₀ is also pulled out from the warp yarn opening. All defective weft yarns Y ₀ are rollers 35,
When the weft yarn detector 37 passes through the gripping region of 36, the weft yarn detector 37 is turned off. The loom control computer C ₀ commands the operation stop of the weft thread take-up motor 33 and the demagnetization of the electromagnetic valves V ₄ and V ₃ based on the yarn non-detection. After the rollers 35 and 36 are separated and the blow nozzle 32 is stopped, the loom control computer C ₀ reverses the loom drive motor M to move the machine base to a crank angle position suitable for resuming weaving, and then resumes weaving. .

Since the weft take-up amount in the weft processing device 27 can be grasped by the rotation amount of the drive roller 35, the success or failure of the miss yarn removal process can be grasped by the weft presence / absence detection of the weft detector 37 and the rotation amount of the drive roller 35. If the miss yarn removal process fails, the alarm device 41 is activated,
Weaving is not restarted.

A single weft insertion error during pile formation cannot be overlooked because it adversely affects the pile formation, but a single weft insertion error during formation of the border Wb may be overlooked depending on the type of pile fabric. There are cases. Even when such a weft insertion error occurs in the border Wb which may be overlooked, if the weaving is stopped, the operation rate of the loom is reduced. However, in this embodiment, the weft insertion error detection signal output from the weft insertion detector 40, which serves as a weft insertion error detection device, continuously performs two weft insertion cycles at the time of border weaving.
Weaving is stopped only when ₀ is detected. Therefore, when a weft insertion error that may be overlooked occurs, the weaving is not stopped, and the operation rate of the loom is improved.

In the case where weft insertion errors occur continuously for two cycles of weft insertion, for example, the main nozzle 2 for weft insertion is used.
There is a weft jam in No. 8. Or pile warp T
Due to the low tension of p, the warp handling becomes defective and the warps are entangled with each other, which induces continuous weft insertion errors. Occurrence of a weft insertion error due to such an unobservable cause induces a weft insertion error over successive weft insertion cycles. Therefore, in the case of weft insertion errors that occur continuously for two weft insertion cycles, by stopping the weaving, it is possible to solve the cause of the weft insertion errors that cannot be overlooked even during border formation. That is, when the yarn clogging in the weft inserting main nozzle 28 is the cause of the weft insertion error, the processing operation by the weft processing device 27 fails, and the cause can be specified. . When warp entanglement is the cause, continuous weft insertion mistakes frequently occur, so the cause can be identified by storing the occurrence frequency.

When the set value N is an integer value of 3 or more, the operating rate of the loom is further improved. If N = 1, the weaving is stopped immediately when a weft insertion error occurs even when weaving the border Wb.

The invention is of course limited only to the embodiment described above.
However, the embodiment shown in FIGS. 6 to 9 is also possible.
is there. In this embodiment, as shown in FIG. 6, for weft insertion
Main nozzles 28A and 28B are used. Electromagnetic bal
Bu Va₁Is the pressure air supplied to the main nozzle 28A for weft insertion.
Supply is controlled and solenoid valve Vb₁Is the main nozzle for weft insertion
Control the pressure air supply to 28B. Maino for weft insertion
The slur 28A is a main nose for weft insertion of weft ya.
The le 28B inserts a weft Yb having a different color from the weft Ya.
In this embodiment, as shown in FIGS. 7A and 7B, the weft Y
a is continuously wefted twice, and the weft Yb is continuous with the weft Ya.
Weft insertion pattern in which weft insertion is performed once during the continuation insertion.
Is set. This weft insertion pattern is used for the loom control
Pewter C₀Input to the loom control computer.
Data C₀Is a solenoid valve V based on this weft insertion pattern.
a ₁, Vb₁Control the demagnetization of.

The loom control computer C ₀ is the weft detector 4
Based on the input of the weft insertion error detection signal from 0, the weaving stop control program shown in the flowcharts of FIGS. 8 and 9 is executed.

When the weft insertion error detection signal is output during weaving the border Wb, the loom control computer C ₀ counts the input detection. If the miss yarn is the weft yarn Ya, the current input detection one time is added to the detection count value n ₁ up to the previous weft insertion cycle. Miss yarn is weft Y
In the case of b, one input detection this time is added to the detection count value n ₂ up to the previous weft insertion cycle.

The wefts Ya and Yb are weft-inserted in the order of (Ya, Ya, Yb), and the loom control computer C ₀ adds the detection count value n ₁ for the input detection of the weft insertion error detection signal for the weft Ya. And zero, and the detection count value n ₂ for the input detection of the weft insertion error detection signal for the weft Yb is added and cleared to zero. That is, when the weft thread Ya to be inserted next to the weft thread Ya that has been miss-inserted has a weft insertion error, the detection count value n
_One input detection is added to 1 and counted. When the weft yarn Ya to be inserted next to the weft yarn Ya which has made a weft insertion error does not have a weft insertion error, the detection count value n ₁ is cleared to zero. Similarly, when the weft yarn Yb to be inserted next to the weft yarn Yb that has made a weft insertion error has a weft insertion error, the detected count value n
_One input detection is added to 1 and counted. When the weft yarn Yb to be inserted next to the weft yarn Yb that has made a weft insertion error does not have a weft insertion error, the detection count value n ₁ is cleared to zero.

If the detected count value n ₁ or n ₂ does not reach the preset value N, the loom control computer C ₀
Does not command weaving to stop. Detection count value n ₁ or n ₂
When the value reaches a preset value N, the loom control computer C ₀ commands the stop of weaving and the operation of the weft processing device 27.

As described above, in the multicolor weft insertion, the weaving operation is improved by performing the weaving stop control based on the presence or absence of continuous weft insertion errors regarding the wefts of the same color.
Further, the cause of occurrence of a weft insertion error such as a thread clogging in the main weft insertion nozzle which cannot be overlooked can be identified in the same manner as in the above-mentioned embodiment. The warp entanglement can be specified by storing the continuous occurrence frequency of weft insertion errors as in the above-described embodiment.

[0041]

As described above in detail, in the invention according to claim 1, weaving is stopped when the weft insertion error detection signal is output during the weaving of the pile weave pattern, and during the weaving of the border weave pattern. The weaving is stopped when the weft insertion error detection signal is continuously output for at least two weft insertion cycles. Therefore, the weaving stop can be avoided when a single weft insertion error that can be overlooked during border weaving is avoided. It has an excellent effect that the operation rate of can be improved.

According to a second aspect of the present invention, at the time of weaving a border weave pattern in multicolor weft insertion, the weft insertion error detection signal indicates at least weft insertion 2 for weft insertion of the same color weft.
Since weaving is stopped when the output is continuous in cycles, even in multi-color wefting, weaving stoppage can be avoided by avoiding a single weft insertion error that can be overlooked during border weaving and weaving operation rate can be improved. It has an excellent effect that it can be improved.

[Brief description of drawings]

FIG. 1 is a side view of the entire loom.

FIG. 2 is a plan sectional view showing a weft processing device and a weft insertion error detection device.

FIG. 3 is a plan sectional view showing a processing operation of the weft processing apparatus.

4 (a) and 4 (b) are cross-sectional views each showing a three-weft towel structure and a border structure.

FIG. 5 is a flowchart showing a weaving stop control program.

FIG. 6 is a plan sectional view showing another example.

7 (a) and 7 (b) are cross-sectional views showing a three-weft towel structure and a border structure in a two-color weft insert.

FIG. 8 is a flowchart showing a weaving stop control program.

FIG. 9 is a flowchart showing a weaving stop control program.

[Explanation of Codes] 40 ... A weft detector that serves as a weft insertion error detection device, C ₀ ... A loom control computer that performs weaving stop control.

Claims (2)

[Claims] 1. A weft insertion error in which a weft insertion error detection signal is output when a weft insertion error occurs when a pile is formed by changing the relative distance between the beating position of the reed and the cloth fell position. In a pile loom equipped with a detection device, weaving is stopped when the weft insertion error detection signal is output during weaving of a pile weave pattern, and at the time of weaving a border weave pattern, the weft insertion error detection signal is at least 2 cycles of weft insertion. A weft insertion error detection method in a pile loom that stops weaving when continuously outputting. 2. A weft insertion error that outputs a weft insertion error detection signal when a weft insertion error occurs when a pile is formed by changing the relative distance between the reed beating position of the reed and the cloth fell position. In a pile loom for multicolor weft insertion equipped with a detection device, weaving is stopped when the weft insertion error detection signal is output during pile weaving pattern weaving, and the weft insertion error detection signal is output during border weaving pattern weaving. Is a weft insertion error detection method in a pile loom that stops weaving when at least two weft insertion cycles are continuously output for weft insertion of the same color weft.