JPH09188923A - Spinning frame and yarn twister equipped with yarn brekage detector and detection of yarn breakage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide both a spinning frame and a yarn twister equipped with a high performance and inexpensive yarn breakage detector and further a method for detecting the yarn breakage. SOLUTION: This spinning frame is equipped with a yarn breakage detector S and obtained by installing the yarn breakage detector S capable of detecting the presence or absence of yarns leading from front rollers to each snail wire 18 in the spinning frame capable of threading the yarns from the front rollers having a front bottom roller 15 provided with a pneumatic suction port 19 thereunder through the snail wire 18 and a ring onto each bobbin. Furthermore, the yarn twister is provided with the yarn breakage detector S. The yarn breakage detector S is equipped with both a long frame having openings opposite to the running positions of the yarns from the respective spindles and a base plate 4, attached to the frame and having both a region for detecting the presence or absence of the running of the yarns from the respective spindles and optically detecting sensors 5 installed in the base plate 4 at an interval. The detector S is installed in a state so as to detect only the presence or absence of the yarns present in yarn paths formed between the front rollers and the snail wires 18 without detecting the presence or absence of the yarn in a yarn path formed between the pneumatic suction port 19 and the snail wire 18 when the yarn breakage occurs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning machine equipped with a yarn breakage detection device, a twisting machine and a yarn breakage detecting method, and more specifically, to detect whether or not a yarn sent from a front roller of the spinning machine or the twisting machine is running. The present invention relates to a spinning machine equipped with a yarn breakage detection device, a twisting machine, and a yarn breakage detection method.

[0002]

2. Description of the Related Art Conventionally, in ring spinning machines and the like, thread breaks have been processed manually by a person who regularly circulates them. However, in recent years when further speeding up and labor saving are required, thread breaks can be detected quickly. It is extremely important to deal with it. As a method for detecting this yarn breakage, for example, Japanese Patent Publication No. 57-2041
Japanese Patent No. 1 discloses a method of detecting a natural vibration peculiar to a ring when a traveler rotates on the ring.

Further, Japanese Patent Laid-Open No. 5-86518 discloses that
There is described a device that amplifies static electricity charged on a yarn due to vibration or the like when the yarn is swirling in a snell wire, and shapes the waveform of the static electricity to detect yarn breakage.

[0004]

However, in the former method, it is necessary to bring the sensor for detecting the vibration into direct contact with the ring, and in addition to the influence of the vibration of the adjacent ring, the influence of the vibration of the spinning machine main body. Also, the detection performance is extremely low. Moreover, there is a buildup of cotton wool around the ring, and the cleaning surface and operation are uncertain and unsatisfactory, and there is a problem that it has not been put to practical use.

The latter device using static electricity not only complicates the device but also has a problem in terms of price, and since a detector for detecting static electricity is set on the back side of the lappet, the spun yarn is caught during doffing. There are defects such as easy breakage.

The present invention has been made in view of such conventional problems, and it is an object of the present invention to provide a spinning machine, a twisting machine and a yarn breakage detecting method equipped with a high performance and inexpensive yarn breakage detecting device. To aim.

[0007]

In order to achieve the above object, a spinning machine equipped with a yarn breakage detecting device of the present invention comprises a ring from a front roller, in which a pneumatic tire is installed below a front bottom roller, through a snail wire. In the spinning machine for winding, the yarn breakage detecting device for detecting the presence or absence of the yarn from the front roller to the snail wire is provided, and the yarn breakage detecting device has a long length having an opening facing the traveling position of the yarn of each weight. And a substrate attached to the frame for detecting the traveling of the thread from each cone and a substrate provided with an optical detection sensor at intervals, and the snare wire from the front roller. The presence / absence of a yarn in the yarn path formed between the pneumograph and the snare wire is detected, and the presence of the yarn in the yarn path formed between the pneumatic and snare wire is detected. Those characterized by comprising attached to the machine frame in a state which is not detected.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A yarn breakage detection device applied to the present invention is a yarn breakage detection device having an optical detection sensor, in which yarn breakage occurs and is a target object between a front roller and a snell wire. The presence / absence of yarn is detected. The yarn is composed of a light emitting element and a light receiving element for receiving the reflected light. If there is no spun yarn between them, the reflected light is not received and the yarn breakage can be detected extremely normally. However, abnormal thread breakage, such as slab thread breakage, increases ballooning between the snell wire and the traveler and is caught by the slab catcher (member for preventing co-breakage) of the snell wire and cuts. In this case, one end of the cut spun yarn is gripped by the slab catcher, and the other end is sucked by the pneumatic material under the front bottom roller to cause a fixed yarn breakage. In other words, the spun yarn is actually cut, but a state where the yarn is not broken is created, and the optical detection sensor receives the reflected light and determines that the yarn is not broken. There was a problem.

As a result of earnestly studying this problem, as a result of providing an insensitive region in the detection sensor, the sensor can be attached at a position where the yarn can be broken within the range from the front nip point in the case of normal yarn break to the yarn path angle range of the snell wire. Since the yarn path angle changes when it is put in the sensitive area, hooked by the slab catcher and sucked by the pneumatic tire, that is, in the case of false thread breakage, the dead zone in front of the intersection of the optical axis of the detection sensor within this yarn path angle range. The position where the sensor is attached is determined so that the false thread breakage occurs in the part, and the sensor determines that the thread breaks, and can detect perfectly both normal thread breakage and false thread breakage. Furthermore, since the yarn breakage detection device of the present invention has a simple structure including the frame and the substrate,
It is inexpensive, and the frame and the substrate may be connected or separated in the longitudinal direction of the spinning machine according to the number of spindles, and the number of spindles can be easily accommodated regardless of the size of the spinning machine.

A yarn breakage detecting device applied to the present invention will be described below based on embodiments.

FIG. 1 (partially omitted perspective view) shows a frame of a detection device according to one embodiment.

As shown in FIG. 1, the frame 1 has an elongated shape, and the front surface 1a faces the traveling position of the yarn of each weight in the spinning machine described later, and the front face 1a has the traveling direction of the yarn of each weight. A plurality of (for example, 12) quadrangular openings 2 corresponding to are formed at equal intervals. Mounting brackets 3 for mounting the frame 1 on a spinning machine stand are provided in the vicinity of both ends of the frame 1.

A substrate mounted on the frame 1 is shown in FIG. 2 (a partially omitted plan view).

The substrate 4 has a plurality (for example, six) of optical detection sensors 5 arranged at equal intervals corresponding to the openings 2 of the frame 1, and the front surface 5 a of the detection sensors 5 is the frame 1. It emerges from the opening 2. Connectors 6 are provided on both ends of the board 4.
a and 6b are provided, and a connector 8 for connection is connected to one connector 6a via a lead wire 7.

Therefore, according to the number of spindles of the spinning machine, the substrate 4
By connecting the connector 8 to the connector 6b of another adjacent substrate 4, the substrate 4 can be electrically connected in the longitudinal direction of the spinning machine. Of course, the frames 1 are also connected in the longitudinal direction of the spinning machine according to the number of substrates 4 connected. The substrate 4 can be electrically connected in the longitudinal direction of the spinning machine. Of course, the frame 1 is also connected in the longitudinal direction of the spinning machine according to the number of connections of the substrates 4.

In this embodiment, the optical detection sensor 5 is
Two light emitting elements are arranged inwardly at intervals so that each light emission intersects in the traveling range of the thread, and two light emitting elements are arranged between the two light emitting elements so as to receive the light reflected by the thread. Although it has a light receiving element, FIG. 3 shows the optical axes of the light emitting element and the light receiving element.

FIG. 3 is a plan view (a) and a side view (b) for explaining the relationship between the optical axis of the detection sensor on the substrate and the yarn traveling position in the yarn breakage detection device according to the present invention.

In FIG. 3, the two light emitting elements of the thread breakage detection sensor 5 are arranged at an angle of about 15 ° with respect to the light receiving elements, and the intersection of the optical axes of both light emitting elements is the farthest point Q of detection. The optical axis is set to be 90 ° with respect to the yarn passing through the farthest point Q. Farthest point Q
By setting the optical axis to 90 ° with respect to the running of the yarn in the range of about 15 ° from the farthest point Q (total angle of 30 °), detection from the farthest point Q closer to the detection sensor 5 side can be performed. If the yarn traveling range d is set to the closest point P, that is, between PQ, the traveling of the yarn can be reliably detected by the detection sensor 5 in this range d. Also, by tilting the light emitting element at an angle of 15 ° with respect to the light receiving element, interference with an adjacent detection sensor can be effectively avoided.

The angle formed by the light emitting element and the light receiving element, in other words, the angle formed by the optical axes of light emitted from both light emitting elements is 3
It does not have to be 0 °, but may be in the range of 15 to 30 °. If it is set at 15 °, the angles formed by both the light emitting element and the light receiving element may be set at 7.5 °. However, 30 ° is preferable from the viewpoint of detection sensitivity and the like. Here, by the way, the distance L1 from the front surface 5a of the detection sensor 5 to the farthest point Q and the distance L2 from the front surface 5a to the closest point P.
Is, for example, L1 = 30 mm and L2 = 20 mm, and the traveling range d in this case is 10 mm. Then, the light reflected by the yarn located in the traveling range d is received by the light receiving element,
When the reflected light is received, a signal with a yarn is output, and when the reflected light is not received, a yarn breakage signal is output.

Further, when a broken thread enters the dead zone portion before the optical axis of the light emitting element, a thread break signal is output.

FIG. 4 is a plan view for explaining the detection range of the detection sensor in the yarn breakage detection device applied to the present invention.

One of the two light emitting elements, the light emitting element 9
a emits light in a region between A and B in FIG. 4, another light emitting element 9b emits light in a region between C and D in FIG. 4, and a region where light of both light emitting devices overlap ( (Area G in the figure), the presence of the thread Y from the front roller to the snare wire is detected to detect the presence or absence of the thread Y, while in the dead zone area (area H in the figure) where the light from both light emitting elements is not applied. A yarn path formed between the pneumatic tire and the snail wire due to yarn breakage is present so that the presence or absence of a yarn in this yarn path is not detected. The light receiving element 9c
Receives the reflected light of the yarn in the area between E and F.

FIG. 5 is a partial view showing an example of a spinning machine to which the yarn breakage detecting device according to the present invention is attached. FIG.
FIG. 6 is an enlarged view of a main part of the spinning machine shown in FIG. 5.

The position setting of the yarn breakage detecting device differs depending on the stand angle of various spinning machines, the distance between the nip point and the snell wire, etc., but normally, as shown in FIG. 6, for example, as shown in FIG. The position of the front surface 5a of the detection sensor 5 between the spun yarn and the spun yarn is 10 to 30 mm in front of the vertical line of the front bottom roller (H1), and 30 to 50 mm below the horizontal line of the center (V1). By setting it within the range of (1), it is possible to judge that the false yarn breakage is a yarn breakage and further improve the detection capability of the detection device as a whole.

The position of the pneumatic (suction port) 19 is
Front bottom roller center 0 to 20m in front of vertical line
Position between m (H2), 15-30 below the central horizon
The position of the snare wire (center) 18 is 50 to 150 mm in front of the front vertical line of the front bottom roller (H3) and 50 to 200 mm below the center horizontal line. Position between (V3)
The position of the yarn breakage detecting device is set in the spinning machine in the range.

The spinning machine of FIG. 5 has a part (upper part) thereof.
Although only shown, the roving thread W from the roving thread bobbin 12 suspended on the creel 11 erected on the spinning frame 10 is shown.
Is wound around the bobbin 17 through the top roller 14 and the bottom roller 15 of the roller stand 13, and further through the lappet angle portion snell wire 18.

There are various structures of the spinning frame,
The yarn breakage detection device of the present invention is not limited to the above spinning machine, but is attached to the above spinning machine at the above position.

In this embodiment, the detecting device S is located between the center vertical line of the front bottom roller and the spun yarn by fitting the fitting provided on the frame 1 to the fitting attached to the spinning machine roller stand. The front bottom roller is fixed at a position 10 to 30 mm from the center vertical line and 30 to 50 mm below the center horizontal line. At this time, the front surface 1a of the frame 1 is, of course, directed toward the yarn running side, and can be easily removed during maintenance or regular cleaning. In addition, the frame 1 has a substrate 4
Is provided, and the detection sensor 5 on the substrate 4 is exposed to the opening 2 of the frame 1.

Further, the spinning machine front bottom roller 1
5 and an enlarged view around the bobbin 17 are shown in FIG. The lappet angle 16 moves up and down according to the position where the spun yarn Y from the bottom roller 15 is wound around the bobbin 17. At this time, the distance from the detection sensor 5 to the yarn traveling position changes, but the distance between the farthest point Q and the closest point P that can be detected corresponds to the yarn traveling range d as described with reference to FIG. Therefore, there is no problem in detecting whether or not the yarn is running. In addition, the slab catcher 20 attached to the snell wire 18
Even if the yarn is entangled with the yarn and the yarn breaks, and the other end of the broken yarn is sucked into the pneumatic 19, the yarn cut in the dead zone before the optical axis of the optical detection sensor crosses Since it enters, it becomes possible to detect a thread breakage.

Further, the light receiving portion including the light receiving element is used as an optical synchronization detecting circuit, and the pulse period of the light emitting portion including the light emitting element is 13
0 μs, pulse width 8 μs, emission wavelength 800 to 9
By setting a filter for colored yarn on the front surface 5a of the detection sensor 5 (especially immediately before the light receiving element) with a thickness of 50 nm, the resistance to ambient light is increased, and not only white thin yarn but also thin colored yarn It is also possible to stably detect.

In the above embodiments, the present invention is applied to a spinning machine, but the present invention can also be applied to a twisting machine for twisting a plurality of yarns instead of a roving yarn.

Further, in the above embodiment, when the optical detection sensor 5 detects the yarn breakage, when the spindle driving motor is commonly driven by one spinning machine by a belt or the like, the yarn breakage occurs. The motor is decelerated or stopped according to the number. However, in the case where one drive motor is provided for each weight,
In other words, in the single spindle drive motor, if each of the weights related to the yarn breakage is individually stopped, the other weights that have not been yarn breakage operate as they are, so that spinning is efficient.

As another embodiment, when the optical detection sensor 5 of the above embodiment detects a yarn breakage, the roving yarn is supplied in response to the yarn breakage detection signal in order to reduce wasteful consumption of the roving yarn. You may make it stop. If the suction force of the pneumatic tire is reduced or the operation is stopped in response to the yarn breakage detection signal, the power consumption can be reduced accordingly. Furthermore, as still another embodiment, a yarn breakage detection signal from the optical detection sensor 5 is used to turn on (or turn off) only the entire spinning machine or only an illumination lamp that illuminates a partial region related to the yarn breakage. The main motor of the spinning machine may be stopped. As still another embodiment, an automatic thread tethering machine that is movable to the left and right of the spinning machine is provided, or in the case where a thread breakage is detected, the automatic thread tethering machine is located at a position corresponding to the optical detection sensor. May be moved so that the yarn splicing operation is automatically performed.

Also, of course, it is possible to confirm the occurrence of abnormal weights from the number of yarn breakage detection signals from the optical detection sensor. For a spinning machine with abnormalities, stop the machine and perform sufficient maintenance. You can also

Furthermore, in the entire factory where dozens of spinning machines are installed, the yarn breakage status of each spinning machine can be electrically grasped, so that the lighting control of the entire factory and the operation status of various motors can be confirmed. It is also possible to perform fine control such as control.

[0036]

Since the spinning machine equipped with the yarn breakage detecting device of the present invention has the above-described structure, the yarn is entangled with the member for preventing co-breakage attached to the snell wire and the yarn breaks, Even if the other end of the thread is sucked into the pneumatic tire, the broken thread enters the dead zone before the optical axis of the optical detection sensor crosses, so it is possible to detect thread breakage. Becomes

Moreover, the apparatus itself is inexpensive because it has a simple structure composed of a frame and a substrate, and the frame and the substrate may be connected or separated in the longitudinal direction of the spinning machine according to the number of weights. It can easily support the number of spindles regardless of the size of the spinning machine.

Therefore, by applying the detection device of the present invention to a spinning machine, for example, early detection of roller winding, reduction of pneumatic waste, production control, reduction of stand-up work, quality improvement,
Many problems such as unmanned operation by interlocking with the roving stop device can be solved.

[Brief description of the drawings]

FIG. 1 is a partially omitted perspective view showing an embodiment of a frame of a yarn breakage detection device applied to the present invention.

FIG. 2 is a partially omitted perspective view showing an embodiment of a substrate of a yarn breakage detection device applied to the present invention.

FIG. 3 is a plan view (a) and a side view (b) for explaining the relationship between the optical axis of the detection sensor on the substrate and the yarn traveling position in the yarn breakage detection device applied to the present invention.

FIG. 4 is a plan view illustrating a detection range of a detection sensor in the yarn breakage detection device applied to the present invention.

FIG. 5 is a partial view showing an example of a spinning machine equipped with the yarn breakage detection device according to the present invention.

FIG. 6 is an enlarged view of a main part of the spinning machine shown in FIG.

[Explanation of symbols]

 1: Frame 2: Opening 3: Mounting bracket 4: Substrate 5: Optical detection sensor 6: Connector 7: Lead wire 8: Connector 9a, 9b: Light emitting element 9c: Light receiving element 10: Spinning machine frame 11: Creel 12: Coarse 12: Coarse Thread bobbin 13: Roller stand 14: Top roller 15: Bottom roller 16: Lapette angle 17: Bobbin 18: Snell wire 19: Pneumatic 20: Slab catcher S: Thread breakage detector W: Coarse thread Y: Spun thread

Claims (10)

[Claims] 1. A spinning machine for winding a ring from a front roller, which has a pneumatic structure below a front bottom roller, through a snail wire, and a thread breakage detecting device for detecting the presence / absence of a thread from the front roller to the snare wire. The yarn breakage detection device is provided with an elongated frame having an opening facing the traveling position of the yarn of each weight, an area attached to this frame for detecting the traveling of the yarn from each cone, and an optical detection. And a substrate provided with a sensor provided at a distance, and detects the presence or absence of a yarn in a yarn path formed between the front roller and the snare wire, and a yarn breakage occurs and A fine thread equipped with a thread breakage detection device, characterized in that it is attached to the machine base in a state in which the presence or absence of a thread in the thread path formed with the snail wire is not detected. Machine. 2. An optical sensor is located between the center vertical line of the front bottom roller and the spun yarn, and is located 10 to 30 mm from the center vertical line of the front bottom roller and 30 to 50 mm below the center horizontal line. A spinning machine equipped with the yarn breakage detection device according to claim 1, wherein the spinning machine is attached. 3. The thread breakage detecting device according to claim 1, wherein the long frame and the substrate are connected in the longitudinal direction of the machine base in accordance with the number of weights. Spinning machine. 4. The optical detection sensor receives two light-emitting elements, which are arranged inward and are spaced from each other so that the optical axes of each light emission intersect in the traveling range of the thread, and the light reflected by the thread. 4. A spinning machine equipped with the yarn breakage detecting device according to claim 1, wherein the spinning machine comprises a light receiving element arranged between two light emitting elements. 5. The light emitting device has a maximum wavelength of 800 to 950n.
The spinning machine equipped with the yarn breakage detecting device according to claim 4, wherein the spinning machine emits m infrared light, and an intersecting angle of optical axes of light emitted from both light emitting elements is 15 to 30 °. 6. The spinning machine according to claim 5, wherein a filter for colored yarn is arranged in front of the light receiving element. 7. A weight driving motor is provided for each cone, and the weight driving motor is individually stopped by a yarn absence detection signal of the optical detection sensor. A spinning machine equipped with the yarn breakage detection device according to any one of 6 above. 8. The yarn breakage detecting device according to claim 1, wherein the supply of the roving yarn is stopped in response to the yarn absence detection signal of the optical detection sensor. A spinning machine equipped. 9. A yarn breakage detecting device for detecting the presence or absence of a yarn from the front roller to the snail wire in a twisting machine for winding a ring from the front roller having a pneumatic under the front bottom roller via a snail wire. The yarn breakage detection device is provided with an elongated frame having an opening facing the traveling position of the yarn of each weight, an area attached to this frame for detecting the traveling of the yarn from each cone, and an optical detection. And a substrate provided with a sensor provided at a distance, and detects the presence or absence of a yarn in a yarn path formed between the front roller and the snare wire, and a yarn breakage occurs and A twist equipped with a yarn breakage detection device characterized in that it is attached to the machine base in a state where the presence or absence of a yarn in the yarn path formed with the snail wire is not detected. Machine. 10. A spinning machine or a twisting machine for winding a ring from a front roller in which a pneumatic is installed below a front bottom roller to a ring via a snail wire, and each spindle is formed between the front roller and the snare wire. Of a spinning machine or a twisting machine, characterized in that it detects the presence or absence of a yarn in the yarn path, and does not detect the presence or absence of a yarn in the yarn path formed between the pneumatic and snare wire due to thread breakage. Thread breakage detection method.