JPH0431277Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a marking device that makes erasable marks on the side of the base fabric at defective areas such as thread breaks in the fabric on a loom such as a tufting machine. be.

(Prior art) To explain the looms that weave tufted carpets, a tufting machine weaves a carpet by inserting pile threads into the base fabric using a large number of needles, and the woven long carpet is wound up by a winding machine. To go.

Tufting machines have a large number of needles, e.g.
A pile is formed on the base fabric using over 1000 needles and loopers that correspond to those needles, but if the thread threaded through the needles breaks or a problem occurs in the weaving process, the tufting machine is immediately removed. must be stopped. Several types of thread breakage detection devices have been proposed that detect thread breakage optically or mechanically. The tufting machine is stopped.
If a yarn break is detected, either repair it immediately or mark it on the side fabric so that it can be repaired first before the fabric is wound on the winder. The marked mark is visually monitored, and when the mark is near, the base fabric feeder is manually stopped and the defective part is repaired. After the repair is completed, the base fabric feed is started again and the next mark appears. Workers will continue to monitor until

(Problem that the invention aims to solve) Marks placed on the base fabric of tufted carpets serve as marks for repairing broken threads later.
It must be able to be erased after repair. A device has been proposed that uses ink to mark trouble spots on the base fabric of a loom (Japanese Patent Application Laid-Open No. 1982-
However, since the ink mark cannot be erased later, it cannot be applied to the tufted machine to which the present invention is applied.

The object of the present invention is to provide a marking device that makes a mark that can be erased later on the side of a woven fabric in a defective area.

(Means for Solving the Problems) The marking device of the present invention includes a base that is disposed on the base fabric at the side of the woven fabric and supported movably in the width direction of the base fabric, and a base that is moved. A drive source, a yoke holding member that slidably supports the yoke to prevent it from falling by itself, is supported in a vertically slidable manner on a base and is biased upward, and a presser for pushing down the yoke. When the metal fitting, the drive source that drives this presser metal fitting, and the marking signal for marking are input, the force that pushes down the yoke is pushed down and the base is moved a certain distance in the width direction of the base fabric, and then the force that pushes down the yoke is applied. and a control circuit that controls both of the drive sources to release the base and return the base to its original position.

In a preferred embodiment of the present invention, a sensor for detecting yarn breakage is provided, and the control circuit inputs the output signal of the sensor as a marking signal, and automatically performs processes from yarn breakage detection to marking.

(Function) When a marking signal is input to the control circuit, a mark is placed by pressing the yoke against the base fabric at that time and pulling it a certain length in the width direction of the base fabric. Thereafter, the force pushing down the cheese yoke is released, and the cheese yoke is returned to its original position in a state where it is separated from the base fabric due to the force pushing it upward, and one marking operation is completed.

If a thread breakage detection sensor is further provided, a mark is automatically placed on the base fabric on the side of the woven fabric when a thread breakage is detected in the loom.

(Embodiment) FIG. 1 shows a tufting machine to which the present invention is applied.

1 is the tufting machine body, and the base fabric 2 wound into a roll is passed through the tufting machine 1 through rollers.
supplied to Pile threads are pushed through the base fabric 2 by a large number of needles 3 and loopers to form a pile, and a woven fabric such as a carpet is woven.

The tufting machine 1 further includes a thread breakage sensor 4 that optically detects thread breakage, and a marking device 5 that marks the base fabric on the side of the woven fabric in a color different from that of the base fabric.
is provided.

A tufting control switch 6 inputs an on/off signal for operating the tufting machine 1. 7 is the ON/OFF operation of the tufting machine 1.
This is a tufting control section that controls turning off and also controls the operation of the marking device 5. The tufting control section 7 turns the tufting machine 1 on or off according to the signal from the switch 6, and when the signal for detecting thread breakage from the thread breakage sensor 4 is input, it stops the tufting machine 1 and turns the tufting machine 1 off at that point. The operation of marking the base fabric by the marking device 5 is controlled.

The woven fabric sent out from the tufting machine 1 is supplied to the dancer section 8. The dancer section 8 includes a plurality of rollers, and by moving the lower roller in the vertical direction, the winding operation of the winding machine 10 and the tufting machine 1 are independently turned on and off. We are making it possible to do so.

In the winding machine 10, the woven fabric is wound up by a roller driven by a winding motor 11.

A repair work station 9 is provided between the dancer section 8 and the winder 10. The repair work station 9 is provided with a mark detection sensor 13 that detects marks provided on the base fabric on the sides of the woven fabric. 14 is a switch for turning on and off the operation of the winding machine 10. 12 is a winding control unit that controls the operation of the winding motor 11, and a mark detection sensor 13
The detection signal and the input signal from the switch 14 are input to the winding control section 12. The winding control section 12 stops the winding motor 11 upon receiving the detection signal from the mark detection sensor 13. The winding motor 11 can be automatically started after a certain period of time after it has been stopped, or it can be left unstarted. Switch 1 while motor 11 is stopped
When the on signal from 4 is input, the winding control section 1
2 starts the motor 11.

FIG. 2 shows a specific example of the yarn breakage sensor 4 used in one embodiment. This thread breakage sensor has already been proposed by the present inventors (Patent Application No. 1983).
-Refer to issue 202060).

A pile system 21 is passed through the needle 3, and the needle 3 penetrates the base fabric 2 in each cycle, collaborating with a looper 22 provided under the base fabric 2 to form a pile 23 on the base fabric 2. continue to form. When forming a cut pile on the base fabric 2, the knife 24 cooperating with the looper 22 is operated.

In order to constitute a thread breakage sensor, a light source 25 is provided on one side of the thread 21 passed through the needle 3, and an optical fiber 26 is provided on the other side with the thread 21 interposed therebetween. The light source 25 is, for example, an arrangement of LEDs (light emitting diodes) along the arrangement of the needles 3. The light from the light source 25 becomes parallel light rays and is irradiated in the direction of the optical fiber 26. When the needle 3 is located near the top of the thread 21, the light from the light source 25 reaches the light receiving end 26a of the optical fiber 26.
The optical fiber 26 is fixed by a support 27 so as to block the light from entering the optical fiber 26. The rear end of the optical fiber 26 is connected to the interface 2.
It is optically connected to the optical sensor 29 of 8.

The optical fiber 26 is the needle 3 of the tufting machine.
The needles are provided in correspondence with the number of needles.
An optical sensor 29 is provided for each optical fiber 26, and the output signal of each optical sensor 29 is sent to the tufting control section 7 via a cable 30.

The operation of the yarn breakage sensor 4 is linked with the operation of the tufting machine 1, and the optical sensor 29 detects yarn breakage at the timing when the needle 10 is located near the uppermost position. In the normal state when the thread 21 is inserted through the needle 3, the light from the light source 25 passes through the thread 21.
However, when the thread breaks, the light from the light source 25 is received by the optical fiber 26 and transmitted to the optical sensor 29 because the thread 21 is no longer present. . When the tufting control unit 7 detects thread breakage based on the signal from the sensor 4, it issues an alarm with an alarm buzzer, displays the number of needles in which the thread breakage has occurred, and stops the tufting machine 1. , the marking device 5 marks the base fabric on the side of the woven fabric where the yarn breakage has occurred.

A specific example of the marking device 5 is shown in FIGS. 3 and 4. FIG. 3 is a schematic side view, and FIG. 4 is a schematic front view.

An L-shaped presser metal fitting 32 is rotatably supported on a base 31 by a fulcrum 33. Presser metal fitting 32
The shaft of a cylinder 34 operated by pneumatic pressure is attached to the base end of the presser 34, and the presser metal fitting 32 rotates around the fulcrum 33 by the operation of the cylinder 34. The tip of the presser metal fitting 32 comes into contact with the tip of the yoke 35 that is supported by the base 31 so as to be slidable in the vertical direction,
Press the yoke 35 downward. Chiyoke 3
5 is biased upward at the portion supported by the base 31.

The base 31 is also supported for horizontal movement and is driven by a pneumatically actuated cylinder 36. 37 and 38 are electromagnetic valves that supply and discharge compressed air to and from the cylinders 34 and 36, respectively. 39 is a control circuit which inputs signals from the manual input contact 40 and the external input contact 41, and controls the cylinder 34,
Control 36. The external contact 41 is connected to the tufting control section 7, and a signal is input from the external contact 41 via the control section 7 when the thread breakage sensor 4 detects thread breakage.

A cover 42 is provided at the bottom of the yoke 35, and the base fabric 2 on the side of the woven fabric woven by a tufting machine passes through the cover 42. cylinder 36
The operating direction is the width direction of the base fabric 2.

Since the number of teeth yoke 35 decreases with use, the control circuit 39 is provided with a buzzer or a lamp 43 in order to notify when it is time to replace the teeth yoke 35 based on the amount of rotation of the presser metal fitting 32.

The mechanism of the marking device is shown in more detail in FIGS. 5 and 6.

In order to support the chi yoke, the base 31 is provided with a cylinder 44 into which the chi yoke is placed. Ru.
The cylinder 44 is slidably supported on the base 31,
It is biased upward. A pin 45 is provided on the side of the cylinder 44, and the pin 45 is held down by a holding fitting 46. The presser metal fitting 46 is attached to the tip of an L-shaped lever 47, and the base end of the lever 47 is rotatably supported by a pin 48.
The intermediate portion of the lever 47 is supported by a pin 49 at the rear end of the cylinder 34, and rotates about the pin 48 as the cylinder 34 operates.

The cylinder 36 is the base 3 in FIGS. 5 and 6.
1 so as to operate in the opposite direction to that shown in FIG.

FIG. 7 shows a specific example of the mark detection sensor 13 and a portion of the winding control section 12 that operates in conjunction with the sensor output.

The base fabric 2 on the side of the woven fabric passes through the gap between the cover 60. A light source 50 such as an incandescent bulb or an LED is provided to irradiate light onto the base fabric 2 on the side of the base fabric 2.
Color sensor 51 to receive reflected light from
is provided. 52 is an amplifier that amplifies the detection signal of the color sensor 51; 53 is a differentiation circuit that differentiates the output of the amplifier 52; 54 inputs the differentiated signal; when the differentiated signal exceeds a certain level, the signal is output for a predetermined period of time; This is a timer that outputs . 55 is an amplifier that operates relays 56 and 57 in response to a signal from timer 54. relay 5
6 is a relay that stops the winding motor 11, and 57 is a relay that sounds an alarm buzzer to notify the operator.

Next, the operation of this embodiment will be explained.

First, the operation of marking the base fabric 2 with a tie yoke using the marking device 5 when the thread breakage sensor 4 detects a thread breakage will be described.

The yoke 35 is made of a material different in color from the base fabric 2.

When the thread breakage sensor 4 detects thread breakage, the tufting control unit 7 stops the tufting machine 1,
Along with sounding the alarm buzzer, the marking device 5
Activate. The marking device 5 first operates in the direction in which the cylinder 34 extends, and the presser metal fitting 46
By slightly lowering the cylinder 44 in which the yoke 35 is placed, the yoke 35 is pressed against the base fabric 2 by rotating the presser metal fitting 32 counterclockwise in the figure. In this state, the cylinder 36 is then operated in the contracting direction in FIG. 3 and in the extending direction in FIG. 5 to move the base 31 horizontally to the right in the figure. As a result, the yoke 35 is pressed and rubbed against the base fabric 2, and a mark is made.

After traveling a certain distance, the cylinder 36 stops operating. Next, the cylinder 34 operates in the direction of contraction, the presser metal fitting 32 rotates clockwise in the figure, the force pressing down on the chain yoke 35 is released, and the presser metal fitting 46
By slightly moving upward, the tube 44 holding the jaw yoke 35 is lifted slightly upward by the spring force. As a result, the contact between the chain yoke 35 and the base fabric 2 is released. Thereafter, the cylinder 36 operates in the opposite direction to return the base 31 to its original position. This completes the operation of marking the base fabric 2.

Next, the operation of the mark detection sensor 13 will be explained.

In FIG. 7, when a marked part of the base fabric 2 on the side of the woven fabric passing through the cover 60 comes, the color sensor 51 detects the color according to the difference in wavelength between the color of the base fabric 2 and the color of the mark. , sends outputs of different voltage levels to the amplifier 52 when detecting the base fabric 2 and when detecting the mark. The signal from amplifier 52 is differentiated, and timer 54 outputs a signal for activating relays 56 and 57 for a certain period of time. This causes the winding motor 11 to stop and the buzzer to sound, and during this time, workers at the repair work station 9 repair the broken thread. After a certain period of time has elapsed, the winding motor 11 is automatically started. If the repair is completed early, the operator can start the winding timer 11 by pressing the control switch 14 before the time set by the timer 54 has elapsed. Conversely, if the repair is not completed within a certain period of time, the take-up motor 11 can be stopped by pressing the switch 14.

As the yarn breakage sensor 4, various types of sensors other than the one shown in FIG. 2 can be used. For example, there is a method of detecting thread breakage using reflected light (see Japanese Patent Laid-Open No. 60-34662), and a method of detecting thread breakage by converging the shadows of multiple stitch rows onto a single photoelectric element using a light-receiving lens (special (Refer to Japanese Patent Application Laid-Open No. 60-34663), a method for mechanically detecting that the loop can no longer be hung on the threading part of the looper (Refer to Japanese Patent Application Laid-Open No. 60-134058), An electrical method that detects thread breakage from the energized state when the needle passes the side of the looper by establishing a potential difference between them (see Japanese Patent Laid-Open No. 151361/1983)
Various types of yarn breakage sensors have been proposed, and when a yarn breakage sensor is used in the present invention, any of these types of yarn breakage sensors can be used.

It is also possible to carry out marking without using a yarn breakage sensor. For example, a worker monitors thread breakage and presses a switch 6 when a thread breakage occurs, and the tufting control section 7 stops the tufting machine 1 in response to a signal from the switch 6, and the marking device 5 Marking may be performed by activating .

Further, when the worker presses the switch 6 when the thread breakage is detected, the tufting control section 7 stops the tufting machine 1, and when the worker further presses the manual input contact 40 of the marking device 5 shown in FIG. The marking device 5 may also be activated.

The marking device 5 does not necessarily have to be used. It is also possible to have a worker monitor thread breakage as in the past, stop the tufting machine 1 when a thread breakage is detected, and manually mark the base fabric 2.

In the mark detection sensor 13, for example, the timer 5
4 is not provided, and when a mark is detected, the winding motor 1
1, and after the repair is completed, the worker turns on switch 1.
The motor 11 may be started by pressing 4.

Although the embodiment shows a method of marking the base fabric using a chiyoke, the means for applying the mark is not limited to the chiyoke, and may be any means that can be attached with a color different from that of the base fabric.

Although the mark detection sensor 13 uses a color sensor to receive reflected light, it is not limited to the color sensor, and a light receiving element that detects the intensity of reflected light, such as a photodiode or a phototransistor, may be used.

The mark detection sensor 13 also differentiates the detection signal of the light-receiving element and performs mark detection using the differentiated signal, but the mark detection is performed by comparing the amplified output of the color sensor and other light-receiving elements with a threshold value. You may also do this.

As the mark detection sensor 13, the embodiment shows one that detects optically, but for example, a metal piece is pasted as the mark, and the mark detection sensor detects the difference in conductivity between the base fabric and the metal piece mark. It is also possible to change to other detection methods, such as attaching a small piece of magnetic material as a mark and having the mark detection sensor detect the lines of magnetic force from the mark.

(Effects of the invention) With the present invention, it is possible to press a tie yoke onto the base fabric to mark defective areas such as thread breaks, so these marks can be erased later. Also,
Since the length of the mark is constant and the distance from the edge of the base fabric is also constant, it is easy to optically detect the mark during repair.

Furthermore, by providing a thread breakage detection sensor, the marking device can automatically mark defective locations using the sensor's output signal, making it possible to automate the process from thread breakage detection to marking. Defects caused by thread breakage can be reliably reduced, and manufacturing costs can also be reduced.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a tufting machine to which the present invention is applied, Fig. 2 is a block diagram showing a thread breakage sensor used in one embodiment, and Fig. 3 is a schematic side view showing a marking device used in one embodiment. , FIG. 4 is a schematic front view thereof, FIG. 5 is a side view showing a mechanical part of the marking device, FIG. 6 is a plan view thereof, and FIG. 7 is a configuration diagram showing a mark detection sensor in one embodiment. DESCRIPTION OF SYMBOLS 1... Tufting machine, 2... Base fabric, 3... Needle, 4... Thread breakage sensor, 5... Marking device, 7... Tufting control section, 9... Repair work place, 10... Winding machine , 11... Winding motor, 12... Winding control unit, 13... Mark detection sensor, 14... Winding control switch, 50... Light source, 51... Color sensor.

Claims (1)

[Claims for Utility Model Registration] (1) A base disposed on the base fabric at the side of the woven fabric and supported movably in the width direction of the base fabric, a driving source for moving the base, and a chiyoke. A yoke holding member that supports the yoke so as to be slidable to the extent that it does not fall by itself, is supported so as to be slidable in the vertical direction on the base and is biased upward, a presser metal fitting for pressing down the yoke, and this presser. When the drive source that drives the metal fittings and the marking signal for marking are input, the yoke is pushed down to move the base a certain distance in the width direction of the base fabric, and then
1. A marking device comprising: a control circuit that controls the drive source to release the force pushing down the yoke and return the base to its original position. (2) The marking device according to claim 1, wherein the control circuit inputs an output signal of a sensor for detecting yarn breakage as a marking signal, and automatically performs the process from yarn breakage detection to marking.