JP2003313755A - Device for detecting selvage warp thread - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent reduction of the quality of a woven fabric caused by sagging of a selvage by automatically detecting the yarn break of a selvage warp thread carrying out a shedding operation by moving upward and downward, and stopping the loom. <P>SOLUTION: A selvage warp thread sensor 16 is installed in a home position at which a pair of the selvages can be detected in a selvage device 1. The output terminal of the selvage warp thread sensor 16 is connected to an input terminal of a circuit 31 for detecting abnormality of the selvage warp thread to detect the pair of the selvage warp threads 2 moving upward and downward according to the weaving operation. The circuit 31 for detecting the abnormality of the selvage warp thread having the detected signal of the selvage warp thread sensor 16 inputted thereto compares a generated form of a detected signal from the selvage warp thread sensor 16 at normal weaving time, with a generated form of a detected signal from the selvage warp thread sensor 16 at abnormal weaving time, and outputs a signal of abnormality in the selvage warp thread when the generated forms are different. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a selvage device for a loom, which automatically detects a yarn breakage of selvage warp yarns.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 7-258943 discloses a control technique for a mottled ear forming device. In the ear forming device, the support gear coaxial with the sun gear is rotated by the drive gear, and the pair of planetary gears rotatably attached to the support gear is through the sun gear and the relay gear fixed to the machine base. It meshes and rotates. A pair of yarn guides are fixed to the planetary gears, and a yarn supplying bobbin is rotatably supported. A tension arm urged by a spring is provided, and the tension arm contacts the selvage warp between the yarn guide and the yarn supplying bobbin to apply tension to the selvage warp.

A pair of selvage warp yarns from the yarn supplying bobbin are connected to the front side of the woven fabric through corresponding yarn guides. When the yarn guide is rotated by the rotation of the support gear, the pair of selvage warp yarns sandwich and hold the weft yarns and form a twist selvage at the end of the woven fabric.

When a yarn breakage occurs due to the completion of consumption of the ear warp of the yarn supplying bobbin or the cutting of the ear warp, the regulation due to the contact between the tension arm and the ear warp is lost, and the tip of the tension arm swings to cause the machine base. The thread break sensor, which is fixed to the contact point, contacts the thread break sensor.

[0005]

As described above, the selvage warp yarns are detected through the tension arm, but the tension arm malfunctions due to the adhesion of the selvage warp yarns, the oil agent, and the fluff. Occasionally, mistakes are made, which compromises the quality of the woven fabric. Further, since the tension arm rotates together with the planetary gears, there is a danger that centrifugal force acts and malfunctions and the loom is stopped. Further, the unwinding tension from the yarn supplying bobbin may fluctuate, which may cause the tension arm to oscillate greatly, in which case the yarn breakage sensor may be contacted and falsely detected as a yarn breakage. The yarn breakage of the selvage warp occurs between the yarn guide and the weave mainly due to the friction associated with the weft insertion during weft insertion and reeding.In that case, the tension drop due to the yarn breakage occurs after passing through the yarn guide. It takes time until the tension arm reaches the tension arm and the thread breakage is detected, and due to the delay of the stop of the loom, ear loosening occurs and the quality of the woven fabric is impaired.

Therefore, an object of the present invention is to automatically detect the yarn breakage of the selvage warp yarns that move up and down and perform opening movement, to promptly stop the loom and prevent deterioration of fabric quality due to loosening of ears and the like. It is to be able to do it.

[0007]

According to the present invention, an ear warp thread sensor is provided at a fixed position capable of detecting a pair of ear warp threads, and an output end of the ear warp thread sensor is provided. Is connected to the input end of the selvage warp abnormality detection circuit, and a pair of selvage warp yarns that move up and down along with the weaving operation are detected by the selvage warp sensor, and the detection signal of this selvage warp sensor is input to the selvage warp abnormality detection circuit. The selvage warp abnormality detection circuit outputs the selvage warp abnormality signal when the generation mode of the detection signal is different from the generation mode of the detection signal from the selvage warp sensor of normal weaving.

More specifically, the selvage warp yarn breakage detecting device moves a pair of selvage warp yarns supplied from the yarn supply device and connected to the weaving cloth up and down by the movement of the yarn guide to open and close the selvage warp yarns. In the selvedge device that holds the ends of the weft yarns, the selvage warp sensor is installed at a fixed position fixed to the machine base that can detect a pair of selvage warp yarns, and the output end of this selvage warp sensor is input to the selvage warp abnormality detection circuit. It is connected to the end and the selvage warp that moves up and down with weaving operation is detected by the selvage warp sensor, and the detection signal of the selvage warp sensor is input to the selvage warp abnormality detection circuit, and the selvage warp abnormality detection circuit is used. The detection signal from the selvage warp sensor at the time of normal weaving is compared with the detection signal from the selvage warp sensor at the time of abnormal weaving, and an ear warp abnormal signal is output when the occurrence forms are different. (Claim 1).

Further, the selvage warp breakage detecting device moves a pair of selvage warp yarns, which are supplied from the yarn supply device and connected to the front of the weave, up and down by the movement of the yarn guide, and opens and closes, and the pair of selvage warp yarns holds the ends of the weft yarns. In the electric selvedge device, a selvage warp sensor having a detection area extending in the vertical direction is provided at a fixed position, and the output end of the selvage warp sensor is connected to the input end of the selvage warp abnormality detection circuit. With a pair of selvage warp sensors that move up and down with
The detection signal of the selvage warp sensor is input to the warp abnormality detection circuit, and the selvage warp abnormality detection circuit detects an abnormality in the selvage warp yarn when the form of the detection signal is different from that during normal weaving in the period in which the selvage warp yarn should be detected. A signal is output (claim 2).

The selvedge device forms a twisting selvage set, and the pair of thread guides are substantially centered on the warp line and face each other across the warp line, and the selvage warp threads are fixed to the machine base. The yarn guide is inserted into the yarn guide (claim 3).

The selvedge device is a planetary gear type twisting selvage device, in which the pair of thread guides are rotatably moved by the planetary gear mechanism about the warp line and are opposed to each other across the warp line. And the yarn feeder moves with its yarn guide (claim 4).

The selvage warp sensor detects selvage warp yarns between the yarn guide and the cloth fell (Claim 5) and is constituted by a photoelectric non-contact sensor (Claim 9) or a piezoelectric element type. It is composed of a contact sensor (claim 10).

The selvage warp yarn anomaly detection circuit detects when the number of selvage warp yarns detected by the selvage warp sensor is less than that during normal weaving within a predetermined period of the weaving cycle or within a predetermined time from a predetermined time of the weaving cycle. Then, an ear warp abnormal signal is output (claim 6). In addition, the other ear warp yarn abnormality detection circuit detects the detection interval of the ear warp yarns, and when the ear warp yarn sensor does not detect the ear warp yarns within a predetermined time or a predetermined period of the weaving cycle, An ear warp abnormal signal is output (Claim 7).

The period in which the selvage warp yarns are to be detected is the entire period of one cycle of weaving, and the detection region includes a vertical movement region of a pair of selvage warp yarns (claim 8).

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2 and 3 show an electric ear assembly device 1 driven by a dedicated motor as an example. The electric selvedge device 1 is usually installed on the yarn supplying side and the opposite yarn supplying side, but FIGS. 1, 2, and 3 exemplify only one side thereof.

In the electric selvedge device 1 of FIGS. 1, 2 and 3, a pair of selvage warp yarns 2 are respectively drawn from the yarn feeder 3 and passed through a balloon breaker 4, a tenser 5, an eyelet 6a and a guide 6b. It is drawn into the yarn guide hole 8a at the axis of the rotary shaft 8. Here, the yarn feeder 3, the balloon breaker 4, the tenser 5, the eyelet 6a, and the guide 6b of the selvage warp 2 are fixed to the machine base 18.
The yarn feeder 7 is configured.

The yarn breakage of the selvage warp yarn 2 in the yarn supplying device 7 is arranged between the eyelet 6a and the guide 6b.
It is adapted to be detected by the yarn feeding sensors 9a and 9b which are in contact with. The yarn feeding sensor 9a and the yarn feeding sensor 9b are constituted by, for example, microswitches, and each movable piece makes contact with the corresponding selvage warp yarn 2.

The two selvage warp yarns 2 are separated at the exit side of the yarn guide hole 8a at the shaft center of the rotary shaft 8, and a pair of yarn guides 11 are provided at each end of a propeller-shaped rotary arm 10 integral with the rotary shaft 8. And then pass between the two guide pins 12 and the woven cloth 13
Has reached 14 weaves. The rotary shaft 8 is the drive motor 1
5 is also the shaft of the motor rotor 15a. Drive motor 15
Is attached to the machine base 18 by a motor bracket 17, a mounting bolt 17a, and a vertically long mounting hole 17b so as to be positionally adjustable, and is driven by the electric selvedge control device 20 of FIG. 4 in synchronization with the weaving motion. .

As a result, the rotary arm 10 twists the two selvage warps 2 while sandwiching the ends of the wefts 19 between the two selvage warps 2 to form a twisted selvage tissue (leno selvage tissue). , Holds the end of the weft yarn 19. In addition, weft 19
Is weft-inserted into the openings 23 formed by the upper and lower warp yarns 22 and the upper and lower selvage warp yarns 2, and is beaten to the cloth cloth 14 of the woven fabric 13 by the reeds 24.

Incidentally, the rotating arm 10 is formed of a thin metal plate having flexibility, and the two guide pins 12 are held by the guide pin holder 25, and the two selvage warp yarns 2 are provided therebetween. Through this, the position of the selvage warp 2 in the weaving width direction is regulated while allowing the opening movement of the selvage warp 2 by the rotation of the rotary arm 10. Rotating arm 10 is woven cloth 1
When the two selvage warp yarns 2 form the largest opening 23 in the direction perpendicular to the plane of No. 3, and when the rotary arm 10 is rotated and becomes parallel to the plane of the woven fabric 13, Book selvage 2
Closes the opening 23 and enters a closed state.

Here, the rotary shaft 8 and the cloth cloth 14 of the rotary shaft 8
The rotary arm 10 fixed to the side end portion and having the pair of thread guides 11, the drive motor 15 for driving the rotary arm 10, and the electric selvedge control device 20 for controlling the rotation of the drive motor 15 include a thread guide drive device 21. Are configured.

As described above, the electric selvedge device 1 includes the woven cloth 13
The yarn guide driving device 2 on the delivery side of the cloth cloth 14 of
By intermittently rotating the drive motor 15 of No. 1 in 180 ° units in each weaving cycle, the pair of yarn guides 11 is rotated about the rotary shaft 8 on the warp line, and the pair of selvage warp yarns 2 is Twisting is performed, and the end portion of the weft yarn 19 is held by the twisted portion of the two selvage warp yarns 2. Of course, the pair of selvage warp yarns 2 are supplied from the pair of yarn supplying bodies 3 of the yarn supplying device 7 and are connected to the cloth cloth 14 of the woven cloth 13.

The yarn breakage of the selvage warp yarn 2 near the suture guide driving device 21 is detected by a non-contact selvage warp yarn sensor 16 attached to the guide pin holder 25. The selvage warp sensor 16 is, for example, an optical sensor, and includes a light projector 16a and a light receiver 16b. In this example, the light projector 16a and the light receiver 16b are opposed to each other on a line intersecting the space between the two guide pins 12 and the surface including the rotation shaft 8, and the pair of selvage warp yarns 2 that move vertically. A detection area is formed including a part of the vertical movement area of the.

Next, FIG. 4 shows a mutual connection of the electric selvedge control device 20 for controlling the drive motor 15, the selvage warp yarn breakage detection device 30 as a main part of the present invention, and the main control device 29 in the periphery thereof. Is shown.

In FIG. 4, the main controller 29 is the main motor 26.
The main shaft 27 of the loom is driven by the rotation of the
Detects the rotation angle of the main shaft 27 of the loom and the state of the loom stop from the output of the loom, and executes the control necessary for operating the loom.
A signal of yarn breakage occurrence is fetched from the electric selvage control device 20 to control the operating state of the electric selvage control device 20. The rotation angle signal as the output of the encoder 28 is, for example, 60 in a certain weaving cycle, as a predetermined period of the weaving cycle or a predetermined time from a predetermined time of the weaving cycle.
In order to specify from 0 to 60 in the next weaving cycle, a detection start signal and a detection end signal are sent to the selvage warp abnormality detection circuit 31.

During weaving, the electric selvedge control device 20 drives the drive motor 15 to intermittently rotate the drive motor 15 in 1/2 rotation (180 °) units for each weft insertion (one weaving cycle). Rotate to. Thereby, the pair of thread guides 11
Rotate and move by 1/2 turn, and open and close with the upper and lower selvage yarns 2.
And the upper and lower selvage warp yarns 2 are crossed with the weft-inserted weft yarns 19, and then the upper and lower selvage warp yarns 2 are closed.
The weft yarns 19 are sandwiched between the upper and lower selvage warp yarns 2 without being loosened, and are driven into the cloth fell 14 by the reeds 24. In this way, the two selvage warps 2 form a twisted selvage in the weave 14, and the end of the weft 19 is sandwiched between the selvage selvages to prevent the weft 19 from loosening.

Since the selvage warp yarns 2 on the yarn supplying side of the yarn guide 11 are twisted by the rotation of the yarn guide 11, the electric selvedge control device 20 periodically changes the rotation direction of the drive motor 15 and twists the yarn. To eliminate. Therefore, the counter 32 counts the number of motor half rotations of the drive motor 15, and reverses the rotation direction of the drive motor 15 every time the count value and the preset number of twists on the yarn feeding side match. The twisting direction is periodically changed to prevent the selvage warp yarn 2 from being cut by twisting.

During weaving, the selvage warp sensor 16 detects a motion associated with the rotational movement of the selvage warp yarn 2, and generates a detection signal each time the presence of the selvage warp yarn 2 is detected. Output to 31. The selvage warp yarn abnormality detection circuit 31 has a counter function and counts the detection signals of the selvage warp yarn 2 in the detection period based on the detection start signal and the detection end signal from the encoder 28.

FIG. 5 shows weft insertion and motor rotation (motor 15
Rotation), the ear warp detection (detection signal of the ear warp 2 by the ear warp sensor 16), and the ear warp abnormal signal (the output signal of the ear warp abnormal detection circuit 31) during the detection period.
Is shown on the rotation angle (time) axis.

In the example of FIG. 5, the detection start signal and the detection end signal are the same at a rotation angle of 60 °. When the rotation angle signal input from the encoder 28 reaches 60 °, the selvage warp abnormality detection circuit 31 causes the counter function to finish counting the detection signals of the selvage warp yarns 2 by the selvage warp sensor 16 in the previous detection period. The count number at that time is reset, and counting of the detection signal of the selvage warp 2 by the selvage warp sensor 16 is started in the next detection period.

In each detection period, when the count number of the selvage warp abnormality detection circuit 31 matches a predetermined value, the selvage warp abnormality detection circuit 31 determines that the selvage warp yarn 2 has no abnormality and outputs an selvage warp abnormality signal. Do not output. However, when the count number of the selvage warp abnormality detection circuit 31 is less than a predetermined value in a certain detection period, or when the count number is “1” in FIG. As the occurrence of yarn breakage, an abnormal selvage warp yarn signal is output to the electric selvedge control device 20. Here, the electric ear-set control device 20 is the main control device 2
A signal for stopping the loom due to the occurrence of yarn breakage is output to item 9. Therefore, at this point, the main controller 29
Immediately stops the loom.

In this example, since the yarn guide 11 makes a half rotation for each weft insertion, the predetermined value of the count number is "2".
In the reverse rotation of the yarn guide 11 for eliminating the twist on the yarn supplying side, the first reverse rotation makes one rotation instead of 1/2 rotation in order to keep the weft yarn 19 held, so the count number is "4". However, since it is 2 or more, it is not detected as a thread break.

Thus, the selvage warp abnormality detection circuit 31
The generation form of the detection signal from the selvage warp sensor 16 during normal weaving is compared with the generation form of the detection signal from the selvage warp sensor 16 during abnormal weaving, and these generation forms, that is, the signals from the selvage warp sensor 16 are compared. When the number of counts of the two is different, an ear warp abnormal signal is output.

A yarn breakage of the selvage warp yarn 2 between the cloth fell 14 and the yarn guide 11 and between the yarn guide 11 and the end of the rotary shaft 8 of the drive motor 15 on the cloth fell side is detected by the selvage warp sensor 16.
Yarn breakage on the upstream side of the guide 6b
It is detected by two contact-type yarn feeding sensors 9a and 9b. Of course, the yarn feeding sensor 9a or the yarn feeding sensor 9
When the yarn breakage of the selvage warp yarn 2 is detected by b, the electric selvage assembly control device 20 outputs a signal of yarn breakage occurrence to the main control device 29, so that the main control device 29 immediately stops the loom.

Next, the embodiment of FIG. 6 and FIG.
The selvage warp sensor 16 is constituted by a piezoelectric element type first selvage warp thread sensor 16c and a piezoelectric element type second selvage warp thread sensor 16d, and these are embedded in the middle of each of the pair of guide pins 12 to face each other, This is an example in which the selvage warp yarn abnormality detection circuit 31 is configured by a first timer circuit 31a and a second timer circuit 31b. The first timer circuit 31a and the second timer circuit 31b each have a first
It corresponds to the selvage warp sensor 16c and the second selvage warp sensor 16d.

FIG. 8 shows the weft insertion, the motor rotation (rotation of the motor 15), the first embodiment in the embodiment of FIGS. 6 and 7.
Ear warp detection (ear warp 2 by the first ear warp sensor 16c
Detection signal), a first timer circuit output (a selvage warp abnormal signal from the first timer circuit 31a), a second selvage warp detection (a detection signal of the selvage warp 2 by the second selvage warp sensor 16d), and a second timer circuit output (Ear warp yarn abnormal signal of the second timer circuit 31b) is shown on the rotation angle (time) axis of the main shaft 27.

In this example, the detection time is 1 for each weave.
It is set as 150 ms, which is longer than the cycle period. First timer circuit 31a, second timer circuit 31b
When receiving the detection signals of the corresponding first selvage warp thread sensor 16c and second selvage warp thread sensor 16d, each resets its own timer function and starts timing. Detection time (1
If a detection signal is not input within 50 ms), it is considered that a yarn breakage has occurred, and an ear warp yarn abnormal signal is sent to the electric selvedge controller 20.
Output to.

In the embodiment shown in FIG. 9, the selvage warp sensor 16 is used.
Is an optical sensor, and is composed of a long light projector 16a and a long light receiver 16b, and is arranged in parallel with and opposed to the two guide pins 12. The selvage warp sensor 16 (emitter 16a and photoreceiver 16b) is
It has an elliptical detection area that is long in the up-down direction.

FIG. 10 corresponds to the embodiment of FIG. 9 and has a configuration similar to that of the apparatus of FIG. 4, but the selvage warp abnormality detecting circuit 31 here has a comparator function. Therefore, regardless of the detection period, the level of the amount of light received from the light receiver 16b (output signal level) is always detected as the form of the detection signal and compared with a preset threshold value.

As shown in FIG. 11, when yarn breakage occurs, the sensor light receiving amount of the selvage warp sensor 16 (light receiver 16
Since the level of the received light amount of b) becomes higher than the threshold value,
The selvage warp abnormality detection circuit 31 regards the occurrence of yarn breakage and outputs an selvage warp abnormality signal to the electric selvage set controller 20. When the pair of selvage warp yarns 2 are overlapped at the time of closing, the light receiver 16b
The amount of light received by the photodetector 16 increases momentarily, but it is extremely short. Therefore, by adjusting the response of the photodetector 16b,
In the case of b, a momentary large level change in the amount of received light is not detected and it is not erroneously recognized as a yarn breakage occurrence.

In the embodiment shown in FIG. 12, the selvage warp sensor 16 detects cutting of the selvage warp yarn 2 between the yarn supplying body 3 and the yarn guide 11 and thread breakage due to consumption of the yarn supply from the yarn guide 11 to the cloth cloth 14. This is an example of detection by (light projector 16a / light receiver 16b). In this example, the selvage warp sensor 16 (light projector 16a
The light receiver 16b) is arranged near the rotational movement of the thread guide 11. The yarn breakage of the selvage warp yarn 2 from the yarn feeder 3 to the cloth fell 14 spreads to the selvage warp yarn 2 at the position of the selvage warp yarn sensor 16 (the light emitter 16a and the light receiver 16b), and the selvage yarn sensor 1
6 (light projector 16a / light receiver 16b).
Therefore, according to this example, the yarn feeding sensors 9a, 9b
Are no longer needed and have been omitted.

Further, in FIG. 12, the pair of thread guides 11 are
The planetary gear mechanism 33 rotates (revolves) in a direction opposite to the rotation (revolution) direction during rotation (revolution).

In FIG. 12, the drive motor 15 is attached to the base 34, and the drive gear 35 of the drive motor 15 is attached.
Meshes with a large driven gear 36. Driven gear 3
6 is a support shaft 37 attached to the base 34
The shaft 38 is rotatable by a bearing 38, and a total of four shafts 39 and 40 arranged at the side surface are used to form a pair of relay gears 41, a pair of planet gears 42, and a yarn feeding bobbin 43 integrated with each planet gear 42. It supports the thread guide 11.

The sun gear 44 fixed to the support shaft 37 is in mesh with the relay gear 41 and the planet gear 42 in order. Sun gear 44, relay gear 41 and planetary gear 4
As for the number of teeth of 2, the driven gear 36 is 1/2 around the sun gear 44.
It is set so that each planetary gear 42, the yarn supplying bobbin 43 integrated with the planetary gears 42, and the yarn guide 11 rotate once during rotation. The drive motor 15 is continuously rotating and rotates the driven gear 36 in the same direction by ½ rotation during one cycle of weaving. As a result, the pair of yarn guides 11 opens and closes the selvage warp yarn 2 every time the weft is inserted, holds the end portion of the weft yarn 19 and forms an ear tissue.

[0045]

According to the first aspect of the present invention, in the ear assembly device,
The selvage warp yarn breakage detection device detects a pair of selvage warp yarns that move up and down along with the weaving operation by the selvage warp yarn sensor, and inputs the output signal of the selvage warp sensor to the selvage warp yarn abnormality detection circuit to detect the selvage warp yarn abnormality. The circuit generates a signal from the selvage warp sensor during normal weaving and compares it with a signal from the selvage warp sensor during abnormal weaving, and outputs an abnormal selvage warp signal when the occurrence forms differ. To do. With this configuration, the detection area of the selvage warp sensor is always fixed including the predetermined height position, and even if the detection area of the selvage warp sensor is narrow due to the vertical movement of the selvage warp, the selvage warp can be reliably detected. Become. That is, during normal weaving, the selvage warp that moves up and down at the timing interlocked with the rotation of the loom can be detected, and during yarn breakage, only the uncut yarn can be reliably detected at a predetermined height position. Also, during normal weaving,
It is possible to reliably detect the selvage warp yarns that move up and down at the timing linked to the rotation of the loom, and it is possible to reliably detect only the uncut yarns at the time of yarn breakage. Therefore, the selvage warp abnormality detection circuit to which the detection signal from the selvage warp sensor is input can accurately detect the selvage warp abnormality signal when the yarn breakage, which is different from the normal weaving state, can be detected. Further, the selvage warp is detected without moving through the yarn guide and constantly contacting the selvage warp to regulate the displacement, thereby eliminating thread breakage and eliminating the displacement regulation by the selvage warp. Therefore, it is possible to eliminate a yarn breakage detection error due to a malfunction or malfunction of the selvage warp sensor component.

According to the second aspect, in the electric selvedge device, the selvage warp sensor having a detection region extending in the vertical direction is provided at a fixed position, and the output end of the selvage warp sensor is input to the selvage warp abnormality detection circuit. A pair of selvage warp yarns that are connected to the ends and move up and down in accordance with the weaving operation are detected by the selvage warp sensor, and the detection signal of the selvage warp sensor is input to the selvage warp abnormality detection circuit to detect the selvage warp abnormality. The detection circuit
When the shape of the detection signal is different from that during normal weaving in the period in which the selvage warp should be detected, the selvage warp abnormality signal is output. With this configuration, the selvage warp yarn sensor is fixed to the machine base and provided at a fixed position, so that the detection area is fixed and stable detection is possible. In addition, when the preset selvage warp should be detected, or when the detection area includes the entire up and down movement area of the selvage warp, the shape of the detection signal such as the signal level is monitored, and when it is different from normal weaving. Then, an ear warp abnormal signal is output.

According to the third aspect, the selvedge device forms a twisting selvage set, the pair of yarn guides are substantially centered on the warp line and face each other across the warp line, and the selvage warp yarns are machine base. It is inserted into the yarn guide from the yarn feeder fixed to. According to this structure, the yarn feeding device does not rotate together with the yarn guide, so that the yarn feeding device can be provided at a position apart from the yarn guide and further away from the warp, and the interference between the yarn guide and the warp and the rotation balance of the yarn guide are considered. I don't need it,
It is possible to continuously use a plurality of yarns by increasing the amount of yarns to be fed or by tying a tail yarn of a yarn to a stubby yarn of the next yarn. As a result, the consumption situation of the yarn supply can be easily observed, and the supply of the yarn supply can be performed without stopping the loom.

According to the present invention, the selvedge device is a planetary gear type twisting selvage device, and the pair of thread guides are rotated by the planetary gear mechanism about the warp line.
Further, they are opposed to each other across the warp line, and the yarn feeding device moves together with its yarn guide. According to this structure, the yarn feeder rotates integrally with the yarn guide, and therefore the selvage warp yarns between the yarn guide and the yarn feeder are not twisted, and the yarn guide needs to be reversely rotated in order to cancel the twist. There is no.

According to the present invention, the selvage warp sensor detects the selvage warp yarn between the yarn guide and the cloth fell, so that the detection area is the selvage warp yarn between the thread guide and the cloth fell. When the yarn breaks on the path between the yarn guide and the cloth fell, the selvage warp yarns do not immediately enter the detection area, and the yarn break can be detected quickly.

According to a sixth aspect of the present invention, the selvage warp yarn anomaly detection circuit has a detection count of selvage warp yarns within a predetermined period of a weaving cycle or within a predetermined time from a predetermined time of the weaving cycle more than that during normal weaving. Since the abnormal signal is output when the number is small, malfunctions in the signal processing (counting) process can be reduced.

According to a seventh aspect of the present invention, the selvage warp abnormality detecting circuit detects the selvage warp yarn detection interval and detects an abnormality when the selvage warp yarns are not detected within a predetermined time or within a predetermined period of the weaving cycle. Since the signal is output, the yarn breakage can be quickly detected by adjusting the predetermined amount.

According to claim 8, the period in which the selvage warp yarns are to be detected is the entire period of one cycle of weaving, and the detection region includes the vertical motion region of a pair of selvage warp yarns. It is possible to cope with the yarn breakage of the selvage warp in this mode, and it is not necessary to set the detection timing, which facilitates the detection.

According to the ninth aspect, since the selvage warp yarn sensor is a photoelectric non-contact sensor, the yarn breakage can be detected without applying force to the selvage warp yarn. According to the tenth aspect, since the selvage warp sensor is a piezoelectric element type contact sensor, yarn breakage can be detected in a state of being linked to the tension of the selvage warp.

[Brief description of drawings]

FIG. 1 is a side view of an ear assembly device.

FIG. 2 is a plan view of the ear assembly device.

FIG. 3 is a front view of a main part of the ear assembly device.

FIG. 4 is a block diagram of a drive motor control system.

FIG. 5 is an explanatory diagram of operations and signals during weaving on the rotation angle of the main shaft.

FIG. 6 is an enlarged front view of the main parts of the ear assembly device in another embodiment.

FIG. 7 is a block diagram of a control system of a drive motor according to another embodiment.

FIG. 8 is an explanatory diagram of operations and signals during weaving on the rotation angle of the main shaft in another embodiment.

FIG. 9 is an enlarged front view of the main parts of the ear assembly device in another embodiment.

FIG. 10 is a block diagram of a control system of a drive motor according to another embodiment.

FIG. 11 is an explanatory diagram of operations and signals during weaving on the rotation angle of the main shaft in another embodiment.

FIG. 12 is an enlarged cross-sectional view of a main part of an ear assembly device according to another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electric selvage device 2 Selvage warp 3 Yarn supply body 4 Balloon breaker 5 Tencer 6a Eyelet 6b Guide 7 Yarn supply device 8 Rotating shaft 8a Yarn guide holes 9a, 9b Yarn supply sensor 10 Rotating arm 11 Yarn guide 12 Guide pin 13 Woven cloth 14 Weave 15 Drive motor 15a Motor rotor 16 Ear warp sensor 16a Floodlight
16b Light receiver 16c 1st selvage warp sensor 16d 2nd selvage warp sensor 17 Motor bracket 17a Mounting bolt
17b Installation hole 18 Machine base 19 Weft 20 Electric selvage control device 21 Thread guide drive device 22 Warp 23 Opening 24 Reed 25 Guide pin holder 26 Main motor 27 Main shaft 28 Encoder 29 Main control device 30 Ear warp breakage detection device 31 Ear warp yarn abnormality Detection circuit 31a First timer circuit 31b Second timer circuit 32 Counter 33 Planetary gear mechanism 34 Base 35 Drive gear 36 Driven gear 37 Support shaft 38 Bearing 39 Shaft 40 Shaft 41 Relay gear 42 Planetary gear 43 Spinning bobbin 44 Sun gear

Claims (10)

[Claims] 1. A selvedge device for holding a weft end by a pair of selvage warps by vertically moving and opening and closing a pair of selvage warps, which are supplied from a yarn supply device and connected to a weave, by a pair of selvage warps. An ear warp sensor is installed at a fixed position that can detect the selvage of the selvage, and the output end of this selvage warp sensor is connected to the input end of the selvage warp abnormality detection circuit. With the selvage warp sensor, the detection signal of the selvage warp sensor is input to the selvage warp abnormality detection circuit, and the selvage warp abnormality detection circuit detects the detection signal from the selvage warp sensor during normal weaving. An ear warp yarn breakage detecting device, which outputs an ear warp yarn abnormal signal when the occurrence type is different. 2. An electric selvedge device for moving a pair of selvage warp yarns, which are fed from the yarn supply device and connected to the front of the weave, up and down by the movement of the yarn guide to open and close, and to hold the ends of the weft yarns by the pair of selvage warp yarns. A pair of selvage warp sensors having a detection area extending in the vertical direction is provided at a fixed position, and the output end of the selvage warp sensor is connected to the input end of the selvage warp abnormality detection circuit. The ear warp yarn is detected by the ear warp yarn sensor, and the detection signal of the ear warp yarn sensor is input to the warp yarn abnormality detection circuit, and the ear warp yarn abnormality detection circuit detects the form of the detection signal in the period in which the ear warp yarn should be detected. An selvage warp yarn breakage detecting device, which outputs an abnormal selvage warp yarn signal when it is different from the normal weaving. 3. The selvedge device forms a twisting selvage, and the pair of yarn guides are substantially centered on the warp line and face each other across the warp line, and the selvage warp yarns are fixed to the machine base. The selvage warp breakage detecting device according to claim 1 or 2, wherein the yarn guide is inserted from the yarn device. 4. The selvedge device is a planetary gear type twisting selvage device, wherein the pair of thread guides are rotatably moved by the planetary gear mechanism about the warp line and are opposed to each other across the warp line. The selvage yarn breakage detecting device according to claim 1 or 2, wherein the yarn feeding device moves together with its yarn guide. 5. The selvage warp yarn breakage detection device according to claim 1, wherein the selvage warp sensor detects selvage warp yarns between the yarn guide and the cloth fell. . 6. The selvage warp abnormality detecting circuit has a smaller number of selvage warp yarns detected by the selvage warp sensor than during normal weaving within a predetermined period of the weaving cycle or within a predetermined time from a predetermined time of the weaving cycle. The selvage warp breakage detection device according to claim 1, wherein the selvage warp abnormal signal is output at times. 7. The selvage warp abnormality detection circuit detects a selvage warp detection interval, and when the selvage warp sensor does not detect selvage warp threads within a predetermined time period or a predetermined period of a weaving cycle, The selvage warp breakage detecting device according to claim 1, wherein a warp abnormal signal is output. 8. The period for detecting the selvage warp is 1
The selvage warp yarn breakage detecting device according to claim 2, wherein the detection region includes a vertical movement region of a pair of selvage warp yarns during the entire period of the cycle. 9. The selvage warp yarn breakage detecting device according to claim 1, wherein the selvage warp yarn sensor is constituted by a photoelectric non-contact sensor. 10. The selvage warp yarn breakage detecting device according to claim 1, wherein the selvage warp yarn sensor is constituted by a piezoelectric element type contact sensor.