WO2006030661A1

WO2006030661A1 - Core yarn spinning machine, method of determining presence or absence of core of core yarn, and method of servicing in core yarn spinning machine

Info

Publication number: WO2006030661A1
Application number: PCT/JP2005/016261
Authority: WO
Inventors: Shinichi Satomi; Kei Inoue
Original assignee: Murata Kikai Kabushiki Kaisha
Priority date: 2004-09-16
Filing date: 2005-09-05
Publication date: 2006-03-23
Also published as: JPWO2006030661A1; CN101018900B; EP1801271A1; EP1801271A4; CN101018900A; JP4529977B2

Abstract

A core yarn spinning machine (1) having a spinning apparatus (9) spinning a core yarn and a winding device (12) winding up the spun core yarn (10), comprising a slab catcher (35) determining the presence or absence of the core of the core yarn (10). In the spinning apparatus (9), the spun core yarn (10) is led into the slab catcher (35) in a pre-winding time from the start of the spinning of the core yarn (10) to the start of winding of the core yarn (10) by the winding device (12). When the core yarn is led into the slab catcher, the presence of the core is explicated more than in a time after the winding of the core yarn (10) is started by the winding device (12).

Description

Specification

Core yarn spinning machine, core yarn core yarn presence / absence determination method, and core yarn spinning machine service method

Technical field

[0001] The present invention relates to a core yarn spinning machine capable of determining the presence or absence of a core yarn. The present invention also relates to a core yarn presence / absence determination method for determining whether or not a core yarn has a core yarn contained therein. Furthermore, the present invention relates to a method for performing some service in a core yarn spinning machine.

Background art

[0002] The core yarn spinning machine disclosed in Patent Document 1 is based on an elastic yarn as a core yarn supplied from an elastic yarn supply device and a fiber bundle (covering fiber) drafted by a draft device. The core yarn is manufactured by air spinning with an air spinning device to wrap the core yarn with the covering fiber. Also, this core yarn spinning machine is a slab catcher (yarn monitoring means) that detects yarn defects such as yarn unevenness on the take-up device that winds the core yarn as a package and the core yarn fed to the take-up device! Is provided. Further, the elastic yarn supply device is provided with an elastic yarn detection sensor for detecting the elastic yarn, and when the sensor detects that there is no elastic yarn, the spinning operation is automatically stopped. Yes.

Patent Document 1: Japan 'Japanese Unexamined Patent Publication No. 2002-363834 (Fig. 4, paragraph number 0058 for elastic yarn detection sensor (reference numeral 3 2))

Disclosure of the invention

Problems to be solved by the invention

[0003] In Patent Document 1, since the elastic yarn detection sensor is provided on the upstream side of the pneumatic spinning device, the elastic yarn is detected by the pneumatic spinning device even though the elastic yarn sensor detects the elastic yarn. It is conceivable that it is not inside the covering fiber on the downstream side. For example, when spinning the core yarn, the elastic yarn passes through the side of the pneumatic spinning device and is sucked into the suction nozzle. Power may also be spun out. If such a coreless yarn is wound on a package, the knocking quality is markedly lowered.

[0004] The present invention has been made in view of the above circumstances, and a purpose thereof is a detection method capable of reliably detecting whether or not a core yarn is contained in a core yarn, and such a detection is possible. It is to provide a core yarn spinning machine.

Another object of the present invention is to provide means capable of performing such detection while shortening the operation stop time of the textile machine as much as possible.

Means and effects for solving the problems

[0005] The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

[0006] According to a first aspect of the present invention, there is provided a core yarn spinning machine configured as follows. That is, a spinning device that spins the core yarn and a winding device that winds the spun core yarn are provided. Core yarn presence / absence determining means for determining the presence / absence of the core yarn of the core yarn is provided, and before the winding until the core yarn is started to be cut by the winding device after the spinning of the core yarn is started in the spinning device. At this time, the collected core yarn is introduced into the core yarn presence / absence determining means.

[0007] Thus, the presence or absence of the core yarn can be determined before the core yarn is wound, and the yarn without the core yarn can be prevented from being wound on the package. Therefore, a good quality take-up package can be formed.

In addition, this time before the winding is, specifically, when the yarn is spliced to connect the starting end of the core yarn that has started spinning in the spinning device after the yarn breakage and the end of the core yarn wound around the winding device. At the time of doffing where the full package wound up by the take-up device is replaced with an empty take-up tube not wound with yarn and the yarn is attached to the take-up tube. This is the time before the thread is attached. When doffing, this includes the case where the thread is not yet wound by the tapping device and only the work of attaching the thread to the empty tapping tube attached to the tapping device is performed.

[0008] In the above-described core yarn spinning machine, when the core yarn is introduced into the core yarn presence / absence determining means, the core yarn is scraped by the scraping device when the core yarn is introduced. It is preferable to make the presence of the core yarn more obvious than the time after starting.

In other words, when the core yarn is introduced into the core yarn presence / absence determining means, if the presence of the core yarn becomes more obvious than the time after the start of the cutting by the scooping device, the determination by the core yarn presence / absence determining means is more reliably performed. It can be carried out. In addition, since the core yarn is manifested by using the core yarn before it is cut by the winding device, the core yarn whose core yarn has been made visible is wound by the winding device to reduce the quality. There is nothing.

Here, the manifestation of the presence of the core yarn is a process of making the presence of the core yarn noticeable, for example, if there is a core yarn. (This refers to, for example, the process of loosening the elastic core yarn core yarn, which will be described later), or the processing to increase the ratio of the core yarn thickness to the total core yarn thickness. Say.

[0009] In the core yarn spinning machine, the core yarn of the core yarn is a cocoon yarn, and the core yarn presence / absence determining means includes a core yarn having a thickness of the core yarn or a variation thereof being larger than a threshold value. It is preferable that the presence of the core yarn is made obvious by reducing the tension of the core yarn or loosening the core yarn from the time after the start of the winding.

That is, when the core yarn of the core yarn is an elastic yarn rich in stretchability, the normal yarn having the core yarn contracts depending on the tensile force in the length direction and expands in the radial direction. For this reason, when the core yarn is weakened or loosened from the time after the start of cutting, in the case of a normal core yarn having a core yarn, the thickness of the core yarn detected by the core yarn presence / absence determining means or its There is a tendency for fluctuations to increase. On the other hand, in the case of an abnormal core yarn without a core yarn, the above-mentioned tendency is not observed. Therefore, the core yarn is weakened or slackened from the time after the start of cutting, and the core yarn is detected based on whether the core yarn thickness detected by the core yarn presence / absence judging means is larger than a predetermined value. If it is determined whether or not there is a core yarn, it is possible to accurately detect whether or not the core yarn has a core yarn.

[0010] In the core yarn spinning machine, the core yarn presence / absence determining means is also a yarn monitoring means at a timing after the start of the winding, and the core yarn presence / absence determining means sets a threshold value for determining the presence / absence of the core yarn. It is preferable to have it separately from the yarn monitoring threshold value at the time after the start of picking. As a result, the core yarn presence / absence determining means and the yarn monitoring means can be made common, and both the presence / absence of the core yarn and the yarn monitoring can be accurately performed using different threshold values according to the purpose.

[0011] According to a second aspect of the present invention, in the core yarn presence / absence determination method for determining the presence / absence of a core yarn in the core yarn, the core yarn in which the presence of the core yarn is made more obvious than in a normal state is obtained. A method for determining the presence or absence of a core yarn of a core yarn, which is led to a detection unit for detecting the thickness of the core yarn, and determines that the core yarn is present when the thickness of the core yarn detected by the detection unit or a variation thereof is larger than a predetermined value. Is provided.

[0012] That is, when the core yarn is made more obvious than in the normal state, the normal core yarn having the core yarn is detected in comparison with the abnormal core yarn without the core yarn. The thickness of the core yarn detected at the part or the variation thereof increases. Therefore, if the presence or absence of the core yarn is determined based on whether the thickness of the core yarn detected by the detection unit or its variation is greater than a predetermined value! /, Whether or not the core yarn is contained in the core yarn is determined. Can be accurately detected.

[0013] In the core yarn core yarn presence / absence determination method, when the core yarn is an elastic yarn, the presence of the core yarn is less pronounced than in a normal state, or This is preferably done by loosening the core yarn.

[0014] That is, when the core yarn of the core yarn is an elastic yarn rich in stretchability, the normal yarn having the core yarn contracts depending on the tensile force in the length direction and expands in the radial direction. For this reason, if the tension of the core yarn is weakened or slackened from the normal state, in the case of a normal core yarn having a core yarn, the thickness of the core yarn detected by the detection unit or its variation tends to increase. is there. On the other hand, in the case of an abnormal core yarn without a core yarn, the above tendency is not observed. Accordingly, when the core yarn is weakened or slackened from the normal state and the presence or absence of the core yarn is determined based on whether the thickness of the core yarn detected by the detection unit or the variation thereof is larger than a predetermined value, It is possible to accurately detect whether or not the core thread has a force.

[0015] According to a third aspect of the present invention, there is provided a service method in a core yarn spinning machine, wherein a core yarn presence / absence determining means for determining presence / absence of a core yarn of a core yarn at the time of the service. A service method in a core yarn spinning machine is provided for guiding a core yarn.

[0016] Thereby, during any service work in the core yarn spinning machine, for example, during the yarn splicing work accompanied by the spinning start work or during the doffing work, the presence / absence of the core yarn is determined by the core yarn presence / absence determining means. By making the determination, it is possible to reliably detect the absence of the core yarn of the core yarn without increasing the take-up stop time of the spinning machine, and to prevent deterioration of the package quality.

[0017] In the service method described above, it is preferable that the guide to the core yarn presence / absence determining means of the core yarn is performed at a timing before the service for the yarn take-up is finished.

As a result, it is easy to end the core yarn presence / absence determination during the service time, and the increase in the spinning stoppage time of the spinning machine can be suppressed.

[0018] In the service method described above, it is preferable that the determination is made at the timing before the service is completed.

Thereby, the increase in the take-up stop time of the spinning machine can be made zero. In addition, since the core yarn presence / absence judgment is performed at the timing before the service is terminated and the recapture is resumed, even if the determination of the absence of core yarn is made by the core yarn presence / absence judging means, it is easy to recover the abnormal force. It is.

[0019] According to a fourth aspect of the present invention, there is provided a core yarn spinning machine configured as follows. That is, it has a unit for spinning and winding the core yarn, and a service device for providing a service to the unit. Core yarn presence / absence determining means for determining the presence / absence of core yarn of the core yarn, and guide means for capturing the core yarn at the time of servicing the unit and guiding the captured core yarn to the core yarn presence / absence determining means are provided.

[0020] Thereby, the core yarn can be easily guided to the core yarn presence / absence determining means by the core means capturing the core yarn at the time of service. Therefore, the presence / absence of core yarn can be reliably determined during service work.

[0021] In the core yarn spinning machine, the core yarn presence / absence determining means is provided in the unit, the service device is disposed facing the unit, and the guiding means is configured to connect the core yarn to the core yarn presence / absence. It is preferable that a movable guide for guiding to the judging means is provided on the service device side. Thus, the core yarn can be easily guided from the service device to the core yarn presence / absence determining means by moving the guide.

[0022] In the core yarn spinning machine, it is preferable that the guide is retracted to the service device side when the service is not performed.

As a result, the guide is retracted to the service device side at times other than during service, so that interference between the traveling core yarn or unit side parts and the guide is avoided, and smooth scraping becomes possible.

[0023] In the core yarn spinning machine, the guide rotates the retracted state force and extends to the yarn path side of the core yarn to capture the core yarn and guide it to the core yarn presence / absence determining means. Is preferred.

Thereby, the core yarn can be accurately guided to the core yarn presence / absence determining means. In addition, the guide can be made compact in the retracted state before turning and extending, and the service device can be downsized.

In the core yarn spinning machine, it is preferable that the core yarn presence / absence determining means also serves as a yarn defect detecting means installed on the unit side.

This eliminates the need for specially determining the presence / absence of the core yarn and further simplifies the configuration.

[0025] Preferably, in the core yarn spinning machine, a plurality of units are arranged in parallel, and the service device is configured to be able to travel between the plurality of units. This makes it possible to handle a plurality of units with a single service device, thereby further simplifying the configuration and reducing manufacturing costs.

Brief Description of Drawings

FIG. 1 is a front view of a core yarn spinning machine according to an embodiment of the present invention.

FIG. 2 is a side view showing the core yarn spinning machine as a longitudinal section.

FIG. 3 is a block diagram of a slab catcher that functions as a core yarn presence / absence judging means of the core yarn spinning machine.

[Fig. 4] A graph showing the difference in the output voltage of the light receiving part of the slab catcher depending on the presence or absence of the core yarn inside the core yarn. [5] Front view of core yarn spinning machine according to second embodiment of the present invention.

6] Side view of the core yarn spinning machine as a longitudinal section.

[ ₇ ] Block diagram of a slab catcher that functions as a core yarn presence / absence judging means of the core yarn spinning machine.

圆 8] Side view showing how the doffing operation of the doffing cart is started, the full package is removed, and the core yarn is sucked up and supplemented with a suc- sion pipe in the same core yarn spinning machine.

FIG. 9 is a side view showing that the state force of FIG. 8 also pulls the core yarn downward and guides the core yarn to the slab catcher by the guide.

FIG. 10 is a block diagram of a slab catcher that functions as a core yarn presence / absence determining means, corresponding to FIG.

[11] Perspective view from the doffing cart side showing the state of the guide immediately after the doffing operation in the doffing cart is started.

FIG. 12] A perspective view showing a state where the guide is turned in the retracted state, is extended to the spinning unit side, and the yarn path is brought close by the yarn guide plate.

FIG. 13 is a perspective view showing a state in which the pneumatic cylinder is further extended to guide the core yarn to the slab catcher.

FIG. 14 is a perspective view showing a state in which the yarn path is removed from the yarn gathering plate.

FIG. 15 is a perspective view showing a state where the guide for the yarn path is completed.

Explanation of symbols

1 Core yarn spinning machine

2 Spinning unit

9 Spinning equipment

11 Yarn feeder

12 Trapping device

22 Elastic thread (core thread)

35 Slab catcher (yarn defect detector, core yarn presence / absence judgment device, core yarn presence / absence judgment means) 43 Yarn splicing device 44 Succession pipe (capturing and introducing means, core yarn revealing means)

101 core yarn spinning machine

102 units (spinning unit)

104 doffing equipment (service equipment, service cart)

110 core yarn

122 Elastic thread (core thread)

135 Slab catcher (core yarn presence / absence judging means, core yarn presence / absence judging device, thread defect detecting means

)

158 Guide

188 Suction pipe (core yarn catching means, core yarn revealing means)

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a preferred first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a core yarn spinning machine 1 having a large number of spinning units 2 arranged side by side. The spinning machine 1 is equipped with a yarn splicing carriage (service device) 3, a blower box 4, and a prime mover box 5 that are provided so as to be able to run in the direction in which the spinning units 2 are arranged.

As shown in FIG. 1, each spinning unit 2 has a draft device 7, a spinning device 9, a yarn feeding device 11 and a take-up device 12 as main components. The draft device 7 is provided in the vicinity of the upper end of the casing 6 of the spinning machine 1, and the fiber bundle 8 sent from the draft device 7 is spun by the spinning device 9. A spun yarn (coir) 10 discharged from the spinning device 9 is sent downward, and a slab catcher (yarn defect detector, yarn monitoring means) for detecting a yarn defect, cutting the yarn and removing the defective yarn portion. ) After 35, the take-up device 12 winds it up on a bobbin as a take-up tube to form a knock 45. For example, the slab catcher 35 can be considered to have a function of detecting a defect in thickness unevenness of the yarn, a function of detecting foreign matter mixed in the spun yarn 10, or a combination of these functions.

As shown in FIG. 2, the draft device 7 is for drawing a sliver 13 into a fiber bundle 8, and a middle roller 1 7 on which a knock roller 14, a third roller 15, and an apron belt 16 are mounted. The front roller 18 consists of four rollers.

[0032] The yarn feeder 11 includes a delivery roller 19 supported by the casing 6 of the spinning machine 1 body, And a top-up roller 20 provided so as to come into contact with the delivery roller 19. With this configuration, the core yarn 10 discharged from the spinning device 9 is sandwiched between the delivery roller 19 and the up-roller 20, and the delivery roller 19 is driven to rotate, so that the core yarn 10 is sent to the take-up device 12 side. Yes.

An elastic yarn supply device 23 is provided above the draft device 7. The elastic yarn 22 supplied from the elastic yarn supply device 23 is joined to the fiber bundle 8 from between the front roller 18 and the middle roller 17, passes through the front roller 18 together with the fiber bundle 8, and reaches the spinning device 9. It is configured to be introduced.

In the elastic yarn supply device 23, each spinning unit includes a rotating roller 26 that rotates in contact with the peripheral surface of the elastic yarn package 25, and a motor 24 that rotationally drives the rotating roller 26 via a belt 28. Installed every two. The elastic yarn sleeve / cage 25 is rotatably supported by a cradle arm 27 pivotally supported! RU

[0035] With the above configuration, the elastic yarn 22 unwound from the elastic yarn package 25 passes through the air soccer device 30, a clamp cutter device (not shown), and the supply guide cylinder 31, and is slightly upstream of the front roller 18. To the position and introduced into the spinning device 9 together with the fiber bundle 8. Then, the fiber bundle 8 is wound around the outer periphery of the elastic yarn 22 by the swirling air flow generated by the spinning device 9, and the core yarn 10 having the elastic yarn rich in elasticity as the core yarn is spun, and the yarn feed It is sent further downstream by device 11. Note that the peripheral speed of the delivery roller 19 of the yarn feeder 11 is configured to be greater than the peripheral speed of the rotating roller 26, so that the elastic yarn 22 is stretched to a predetermined stretch ratio (for example, 3 times). Thus, the fiber bundle 8 is wound by the spinning device 9 and spun.

As shown in FIG. 1, the yarn splicing carriage 3 is provided so as to travel along a rail 41 provided on a casing 6 of the spinning machine 1 main body. The yarn splicing cart 3 includes, for example, a yarn splicing device 43 made of a splicer, and a core yarn 10 that is provided on the yarn splicing cart 3 so as to be freely raised and lowered, and is rotated around an axis while being discharged from the spinning device 9. The suction pipe 44 that captures the yarn end while sucking it and guides it to the yarn joining device 43 and the yarn joining cart 3 are provided so as to be able to be lifted and lowered, and is supported rotatably by the take-up device 12 while turning around the shaft. A suction mouse 46 that sucks and captures the yarn end from the package 45 and guides it to the yarn splicing device 43. [0037] A slab catcher 35 and a cutter device 36 are provided on the front side of the casing 6 of the spinning machine 1, and the core yarn 10 spun by the spinning device 9 passes through the detection portion of the slab catcher 35. It is like that. The slab catcher 35 monitors the thickness of the traveling core yarn 10 and transmits a yarn defect detection signal when a fine yarn portion or a thick yarn portion (yarn defect) of the core yarn 10 is detected. Upon receiving this signal, the controller of the spinning unit 2 immediately operates the cutter device 36 to cut the core yarn 10, and at the same time stops the draft device 7, the spinning device 9, the elastic yarn supply device 23, etc. Make the joint truck 3 self-propelled to the front of the spinning unit 2. Thereafter, the spinning device 9 and the elastic yarn supply device 23 are re-driven to cause the yarn splicing cart 3 to perform yarn splicing to resume spinning and winding.

As shown in FIG. 3, the slab catcher (yarn clearer) 35 includes a light projecting unit 37 having a light emitting element power such as an LED and a light receiving unit 38 made of a photoelectric conversion element. I have. The size (area) of the shadow formed on the light receiving unit 38 as a result of the light projected from the light projecting unit 37 being blocked by the core yarn 10 can be converted into a voltage signal by the light receiving unit 38. It has become. As the light receiving unit 38 of the present embodiment, a photoelectric conversion element having such a characteristic that the voltage value increases almost in proportion to the size of the shadow is used.

The slab catcher controller 51 is a known microcomputer, and includes a CPU (arithmetic unit), a ROM, a RAM (storage unit), and an interface (not shown). The storage means is provided with an appropriate program. By the above hardware and this software, the control unit 56, the storage unit 52, the comparison unit 53, the light projection control unit 55, etc. are provided inside the slab catcher controller 51. Has been built.

[0040] The storage unit 52 is mainly configured by a RAM, and stores a voltage value range (allowable voltage value) corresponding to the allowable range of the thickness of the normal core yarn 10, that is, a threshold value for yarn monitoring. Apart from that, a threshold for determining the presence / absence of a core yarn described later can also be stored. The control unit 56 controls the overall operation and communicates with the controller on the spinning unit 2 side. A comparison unit 53 is configured inside the control unit 56, and the comparison unit 53 compares the voltage value input from the light receiving unit 38 with the allowable voltage value.

[0041] With this configuration, the voltage signal from the light receiving unit 38 is successively sent to the slab catcher controller 51. Input and monitor the change in the thickness of the running core yarn 10. That is, when the thickness (contour thickness) of the traveling core yarn 10 varies, the size of the shadow formed on the light receiving unit 38 varies, which appears as a variation in the voltage value output from the light receiving unit 38. This voltage value is digitally converted by the AZD converter 54 and then input to the comparison unit 53 where it is compared with the allowable voltage value. If the core yarn 10 has a yarn defect such as a thick yarn portion or a thin yarn portion, and the yarn defect passes through the detection unit 39, the output voltage value of the light receiving unit changes and falls outside the allowable voltage value range. The control unit 56 of the slab catcher controller 51 that has detected this by the comparison unit 53 sends a yarn defect signal to the control unit 57 of the spinning unit 2 controller. When this is received, the spinning unit 2 side immediately sends a signal to the cutter device 36 to cut the core yarn 10, and a request for yarn joining operation by the yarn joining device 43 is generated. At the same time, the spinning device 9, the elastic yarn supplying device 23, the draft device 7 and the like are stopped, and the winding is interrupted. After that, the control unit 57 of the spinning unit 2 sends a signal to the control unit 60 of the yarn splicing cart 3 so that the spinning unit 2 moves to the position of the spinning unit 2. When the yarn splicing cart 3 arrives at the position of the spinning unit 2, the driving of the spinning device 9, the elastic yarn supplying device 23, etc. is resumed and the yarn splicing cart 3 performs a predetermined yarn splicing operation. The starting end of the core yarn 10 and the end of the core yarn 10 on the package 45 side are joined together for piecing.

Note that the drive voltage of the light projecting unit 37 can be changed by the variable voltage source 48, and the light projecting control unit 55 of the slab catcher controller 51 is connected to the variable voltage source 48. With this configuration, even if deterioration or temperature drift of the light projecting unit 37 occurs, the voltage value that the variable voltage source 48 gives to the light projecting unit 37 is changed so that the light projecting control unit 55 compensates for it. ing. As a result, stable yarn defect detection is realized.

[0043] The above operation is a normal operation of the slab catcher 35 when the core yarn 10 is wound by the take-up device 12. In this embodiment, the slab catcher 35 is used at the time of yarn splicing (in other words, the spinning machine In the device 9, when the spinning of the core yarn 10 is started and the force is before the core yarn 10 is started to be picked up by the picking device 1 2), it is determined whether the elastic yarn 22 is contained in the core yarn 10 or not. It also functions as a determination device for determining whether This configuration will be described below.

[0044] That is, thread breakage occurs in the core yarn 10, or the yarn defect of the core yarn 10 is slab catch When the core yarn 10 is cut by the cutter device 36 and is detected by the cutter 35, the yarn splicing carriage 3 connects the core yarn 10 on the spinning device 9 side that has started spinning and the yarn on the take-up device 12 side to the yarn joining device. The device 43 will splice the yarn. At this stage, the harvesting of the core yarn 10 by the harvesting device 12 is stopped.

At this time, the core yarn 10 spun in the spinning device 9 and sucked and captured by the suction pipe 44 has its yarn path passing through the detection unit 39 and the cutter device 36 of the slab catcher 35 as shown in FIG. Be guided to. As a result, the core yarn 10 that is continuously spun from the spinning device 9 is fed by the yarn feeding device 11, passes through the cutter device 36 and the light projecting unit 37, and is then sucked into the suction pipe 44. Become.

[0046] The suction of the core yarn 10 by the suction pipe 44 is performed by the suction flow generation source 62. The suction force of the suction flow generation source 62 is slightly weaker than the yarn feeding force of the yarn feeding device 11. The suction force setting unit 61 of the controller of the yarn joining cart 3 is set so that Therefore, the tension of the core yarn 10 between the yarn feeding device 11 and the succession pipe 44 is smaller than the tension of the core yarn 10 in the upstream portion of the yarn feeding device 11.

[0047] Here, the core yarn 10 of the present embodiment is spun by winding the fiber bundle 8 around the elastic yarn 22 as a core yarn in a stretched state, so that the tension is weakened, Alternatively, in the state where no tension is applied at all, the core yarn 10 contracts in the length direction and slightly expands in the radial direction. Further, the core yarn 10 is contracted by the elastic force of the elastic yarn 22 to exhibit a sharp edge. In particular, in the present embodiment, the suction force of the suction pipe 44 is set to be weak as described above, so that the core yarn 10 between the yarn feeding device 11 and the suction pipe 44 is formed by the yarn joining device 43. Compared to the time when the yarn splicing is completed and the core yarn 10 is re-taken by the take-up device 12, the radial expansion tendency and the chiseling tendency appear more strongly, and the elastic yarn 22, which is the core yarn of the core yarn 10, appears. Existence will be revealed.

[0048] Therefore, when the normal core yarn 10 having the elastic yarn 22 is spun by the spinning device 9, the spun core yarn 10 passes through the slab catcher 35 between the yarn feeding device 11 and the suction pipe 44. The area of the shadow formed on the light receiving unit 38 increases, and the output voltage of the light receiving unit 38 increases. Therefore, rather than detecting the actual thickness of the core yarn 10, it is possible to detect the distance between the shadow outlines as seen from the radial direction as the outline thickness. , Radial expansion can be detected. In addition, due to the above-described margin, fluctuation (variation) in the output voltage of the light receiving unit 38 increases. On the other hand, when the defective core yarn not containing the elastic yarn 22 is spun from the spinning device 9 for some reason, the above-mentioned radial expansion tendency does not appear. The output voltage of 38 hardly increases. In addition, since almost no blur occurs, the fluctuation of the output voltage of the light receiving unit 38 is small.

Using this, in the slab catcher controller 51, as described above, a predetermined threshold voltage for core yarn presence / absence determination is stored in the storage unit 52, and the voltage value input from the light receiving unit 38 is stored in the storage unit 52. The comparator 53 determines whether the force exceeds the threshold. As a result, if the voltage value is greater than or equal to the threshold value, it is determined that the core yarn 10 is normal with the elastic yarn 22, and if the voltage value is lower than the threshold value, it is determined that the core yarn is not defective with no inertia yarn 22. It is.

[0050] If it is determined that the elastic yarn 22 has entered and is a bad core yarn, the control unit 56 of the slab catcher controller 51 notifies the control unit 57 on the spinning unit 2 side that there is no core yarn. Send. Upon receiving this, the spinning unit 2 side immediately cuts the defective yarn with the cutter device 36, and again performs the returning operation similar to that at the time of the yarn breakage. Alternatively, the abnormality may be notified and stopped, and the operator may remove the abnormality manually.

[0051] In order to confirm the effect of this configuration, the inventor of the present application has made a normal yarn containing the elastic yarn 22 and a core yarn containing only the covering yarn (abnormal core yarn) containing the elastic yarn 22. For threading (the state after thread take-up by the take-up device 12 is started) and at the time of yarn splicing (before starting the take-up of the thread by the take-up device 12 and using the suction pipe 44 to In each of the cases where the yarn was sucked and the yarn was weakly stretched), an experiment was conducted in which the detector 39 of the slab catcher 35 was passed through and the tendency of the output voltage value of the light receiver 38 was examined.

[0052] FIG. 4 (A) shows the results of a core yarn having a thickness of Ne 30 that was spun in a state where an elastic yarn having a thickness of 40 denier was stretched 3.1 times. The average voltage value at the time of cutting was about 3. IV, while it was about 4. IV at the time of splicing.

[0053] On the other hand, FIG. 4 (B) shows the results for Ne30-thick yarns spun only with covering fibers (without elastic yarns) assuming an abnormal core yarn. In this case, the voltage value at the time of thread take-up and the voltage value at the time of yarn splicing remained almost unchanged, and averaged about 3. IV. [0054] As is clear from comparison between Figs. 4 (A) and (B), the output voltage value is about IV between the normal core yarn with elastic yarn and the abnormal core yarn without elastic yarn at the time of yarn splicing. There is a difference. Therefore, if the threshold is set to 3.6 V, for example, and stored in the storage unit 52 and used for the determination in the comparison unit 53, it can be accurately determined whether or not the elastic yarn 22 is contained in the core yarn 10. Become.

[0055] In the present embodiment, as described above, the slab catcher 35 for determining the presence or absence of the core yarn (elastic yarn) 22 of the core yarn 10 is provided, and the spinning device 9 starts spinning the core yarn 10 and the force is The core yarn 10 that has been spun is introduced into the slab catcher 35 at a time before the winding of the core yarn 10 by the take-up device 12, that is, at the time of yarn joining service by the yarn joining device 43. The configuration is such that the presence or absence of the elastic yarn 22 is determined. Therefore, the presence or absence of the core yarn of the core yarn 10 can be reliably determined with a simple configuration. The determination of the presence / absence of the core yarn is performed after the spinning device 9 starts spinning the core yarn 10 and before the take-up by the take-up device 12 is performed. The core yarn 10 is not wound on the winding device 12.

[0056] Further, in the present embodiment, after the start of spinning, the core yarn 10 is sucked weakly by the suction pipe 44, and the core yarn (elastic yarn) 22 is present more than after the start of the scooping by the scooping device 12. It is introduced into the slab catcher 35 in a manifested state. Therefore, the presence or absence of the elastic yarn 22 in the core yarn 10 can be accurately determined.

[0057] In the present embodiment, the core yarn of the core yarn 10 is an elastic yarn 22, and the slab catcher 35 has a core yarn (elastic yarn) having a thickness larger than a predetermined threshold value. It is determined that 22 is present. The manifestation of the presence of the core yarn (elastic yarn) 22 is performed by reducing the tension of the core yarn 10 or slackening the core yarn 10 from the time after the start of the winding.

That is, in this embodiment, since the core yarn is the elastic yarn 22 rich in elasticity, the normal core yarn 10 having the core yarn contracts in the radial direction depending on the tensile force in the length direction. Inflate. For this reason, if the core yarn 10 is weakened or slackened more than after the start of the harvesting by the harvesting device 12 (during harvesting), the normal core yarn 10 having the core yarn is detected by the slab catcher 35. The core yarn 10 tends to be thicker. On the other hand, the core In the case of an abnormal core yarn without yarn, the above tendency does not appear. Therefore, the presence or absence of the core yarn (elastic yarn 22) by the slab catcher 35 can be accurately determined.

Further, in the present embodiment, the presence or absence of the core yarn is determined before the start of the cutting by the winding device 12 because the defect of the core yarn 10 is monitored after the start of the cutting by the winding device 12. This is a slab catcher 35 as a thread monitoring means. The slab catcher 35 as the core yarn presence / absence determining means has a threshold for determining the presence / absence of a core yarn separately from the threshold for monitoring the yarn during spinning. Therefore, the core yarn presence / absence judging means and the yarn monitoring means can be made common, and at the same time, the slab catcher 35 can use both different threshold values according to the purpose for both the presence / absence of the core yarn and the yarn monitoring. be able to.

[0059] In the present embodiment, the core yarn 10 is guided to the detection unit 39 of the slab catcher 35 that detects the contour of the core yarn 10, and the thickness of the core yarn 10 detected by the detection unit 39 is larger than a predetermined threshold value. Therefore, it is determined that the elastic yarn 22 is inside the core yarn 10. Therefore, the presence or absence of the core yarn of the core yarn 10 can be reliably determined with a simple configuration.

[0060] The first preferred embodiment of the present invention has been described above. However, for example, various modifications as shown below can be implemented for the above configuration.

(1) In the above embodiment, when determining the presence or absence of the core yarn, whether or not the core yarn is present is determined by whether or not the output voltage of the light receiving unit 38 corresponding to the size of the contour (contour thickness) exceeds a predetermined threshold value. For example, the slab catcher controller 51 has a function to calculate the variation (variation) of the output voltage of the light receiving unit 38, for example, the standard deviation, and the presence or absence of the core yarn depends on whether or not the variation exceeds a predetermined threshold value. May be determined. Further, the presence / absence of the core yarn may be determined in combination with both the thickness of the core yarn detected by the light receiving unit 38 and the fluctuation (variation) thereof.

[0062] (2) The slab catcher as a yarn defect detector or a core yarn presence / absence determination device is not limited to a so-called photoelectric type, and for example, a capacitance type slab catcher can be adopted.

(3) In the above embodiment, the core yarn presence / absence determination device is also used as a slab catcher, but a core yarn presence / absence determination device may be provided separately from the slab catcher. However, it is desirable to make the slab catcher also serve as a core yarn presence / absence judging device in terms of further simplifying the configuration. Next, a preferred second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0065] Fig. 5 shows a spinning machine 101 for core yarn spinning provided with a large number of spinning units 102 arranged side by side. The spinning machine 101 includes a yarn joining cart 103 provided in the traveling direction in a direction in which the spinning units 102 are arranged, and a doffing cart (service carriage, service provided) that can be run independently of the yarn joining cart. Equipment) 104, blower box 180, and prime mover box 181.

As shown in FIG. 5, each spinning unit 102 has a draft device 107, a spinning member 109, a yarn feeding device 111, and a winding device 112 as main components. The draft device 107 is provided in the vicinity of the upper end of the casing 106 of the spinning machine 101. The draft device 107 is fed from a fiber bundle (covering fiber) 108 sent from the draft device 107 and an elastic yarn supply device 123 described later. The coming elastic yarn (core yarn) 122 is configured to be spun by the spinning member 109. The core yarn 110 as the spun yarn discharged from the spinning member 109 is fed downward by the yarn feeding device 111, passes through the cutter device 136 and the slab catcher (yarn defect detecting means) 135, and is then wound by the winding device 112. To form a knock 145.

[0067] As shown in FIG. 6, the draft device 107 is for drawing a sliver 113 into a fiber bundle 108, and includes a middle roller 117 on which a knock roller 114, a third roller 115, and an apron belt 116 are mounted. It consists of four rollers, front roller 118!

[0068] The yarn feeder 111 includes a delivery roller 139 supported by the casing 106 of the spinning machine 101, and a -up roller 140 provided so as to be able to come into contact with and separate from the delivery roller 139. The core yarn 110 discharged from the spinning member 109 is sandwiched between the delivery roller 139 and the -up roller 140, and the delivery roller 139 is rotationally driven, so that the core yarn 110 is sent to the winding device 112 side.

As shown in FIG. 5 and FIG. 6, the elastic yarn supply device 123 includes a rotating roller 126 for driving the elastic yarn package 125 for each spinning unit 102. The elastic yarn package 125 is rotatably supported by a cradle arm 127 that is pivotally supported, and is configured to contact the circumferential surface of the rotating roller 126. The rotating rollers 126 are connected to the motors 124 via the roller 128 for each spinning tube 102.

[0070] This elastic yarn supply device 123 is controlled by the motor 124 when the elastic yarn 122 is broken. The driving of the rotating roller 126 is stopped, and the rotation of the elastic yarn package 125 can be stopped individually for each spinning unit 102.

[0071] The elastic yarn 122 unwound from the elastic yarn package 125 passes through the air soccer device 130, a clamp cutter device (not shown), and the supply guide tube 131, and is supplied to a position slightly upstream of the front roller 118. It is introduced into the spinning member 109 together with the fiber bundle 108. Then, the fiber bundle 108 is wound around the outer periphery of the elastic yarn 122 by the swirling air flow generated by the spinning member 109, the core yarn 110 is spun, and is further sent downstream by the yarn feeding device 111. The peripheral speed of the delivery roller 139 of the yarn feeding device 111 is configured to be larger than the peripheral speed of the rotating roller 126, so that the elastic yarn 122 is stretched to a predetermined stretch ratio (for example, 3 times). Thus, the fiber bundle 108 is wound around the spinning member 109 and spun.

[0072] The scraping device 112 is configured such that both ends in the axial direction of a bobbin (trapping tube) 148 as a core of the package 145 can be rotatably held, and a driving drum 179 is brought into contact with the peripheral surface of the bobbin 148. The bobbin 148 is rotated so that the core yarn 110 can be taken up.

[0073] As shown in FIGS. 5 and 6, the yarn joining cart 103 is provided with a carriage 142, a splicer 143 such as a splicer provided on the carriage 142, and a carriage 142 that can be raised and lowered. Suction pipe 144 that sucks and catches the yarn end that has been discharged from spinning member 109 and passed through yarn feeding device 111 while turning around, and guided to yarn joining device 143. A suction mouth 146 that sucks and captures the yarn end from a package 145 that is rotatably supported by the take-up device 112 while rotating around the shaft, and guides the yarn end to the yarn joining device 143. .

As shown in FIG. 6, a traveling space 150 of the yarn splicing carriage 103 is formed inside the casing 106 on the rear side. The traveling space 150 is formed in an elongated shape along the direction in which the spinning units 102 are lined up. Rails 141 are disposed above and below the traveling space 150, and traveling wheels 149 are provided below the carriage 142. With this configuration, the yarn splicing carriage 103 can travel in the traveling space 150 by driving the traveling wheels 149 while being guided in the traveling direction by the rails 141. Yes.

[0075] A slab catcher 135 and a cutter device 136 are provided on the front side of the casing 106 of the spinning machine 101 and slightly below the yarn feeder 111, and the slab catcher 135 is detected. The core yarn 110 spun by the spinning member 109 is allowed to pass through before being wound by the tacking device 112. The slab catcher 135 monitors the thickness of the running core yarn 110 and sends a yarn defect detection signal when it detects a fine yarn or thick yarn (yarn defect) of the core yarn 110! / ヽThe Upon receiving this signal, the controller of the spinning unit 102 immediately operates the cutter device 136 to cut the core yarn 110, and stops the draft device 107, the spinning member 109, the elastic yarn supply device 123, etc. The bogie 103 is caused to self-propel to the spinning unit 102. Thereafter, the spinning member 109 and the elastic yarn supplying device 123 are driven again, and the yarn joining cart 103 performs yarn joining to resume spinning and winding.

As shown in FIG. 7, the slab catcher (yarn tarrar) 135 includes a light projecting unit 137 made of a light emitting element such as an LED and a light receiving unit 138 made of a photoelectric conversion element in its detection unit 159. Yes. The size (area) of a shadow formed on the light receiving unit 138 as a result of the light projected from the light projecting unit 137 being blocked by the core yarn 110 can be converted into a voltage signal by the light receiving unit 138. It is summer. In the present embodiment, a photoelectric conversion element having such a characteristic that the voltage value increases in proportion to the size of the shadow is used for the light receiving unit 138.

In FIG. 7, the slab catcher controller 151 is formed by a known microcomputer and includes a CPU (calculation means), ROM, RAM (storage means) and an interface (not shown). An appropriate program is stored in the storage means, and the control unit 156, the storage unit 152, the comparison unit 153, the light projection control unit 155, etc. are constructed inside the slab catcher controller 151 by the hard disk and this software. Has been.

The storage unit 152 is mainly configured by a RAM, and can store a voltage value range (allowable voltage value) corresponding to the allowable range of the thickness of the normal core yarn 110, that is, a threshold value for yarn monitoring. It is configured. The range of the allowable voltage value is determined by one or both of the upper threshold and the lower threshold depending on the yarn defect to be detected. The storage unit In addition to the above-described threshold value for monitoring the yarn, 152 is configured to be able to store a threshold value for determining the presence / absence of a core yarn described later. The control unit 156 controls the entire operation and performs communication with the controller on the spinning unit 102 side. The control unit 156 includes a comparison unit 153. The comparison unit 153 compares the voltage value input from the light receiving unit 138 with the threshold value for yarn monitoring.

[0079] With this configuration, voltage signals from the light receiving unit 138 are successively input to the slab catcher controller 151 to monitor changes in the thickness of the traveling core yarn 110. That is, when the thickness (contour thickness) of the traveling core yarn 110 changes, the size of the shadow formed on the light receiving unit 138 changes, which appears as a change in the voltage value output from the light receiving unit 138. This voltage value is digitally converted by the AZD converter 154, and then input to the comparison unit 153, where it is compared with the threshold value for yarn monitoring. If there are yarn defects such as thick yarn and thin yarn in the core yarn 110 and the yarn defect passes through the detection unit 159, the fluctuation of the output voltage value of the light receiving unit increases and is determined by the threshold value for yarn monitoring. Out of range. The control unit 156 of the slab catcher controller 151 that has detected this by the comparison unit 153 sends a yarn defect signal to the control unit 157 of the controller of the spinning unit 102. When this is received, the spinning unit 102 side immediately sends a signal to the cutter device 136 to cut the core yarn 110, and a request for a yarn splicing operation by the yarn splicing device 143 occurs. At the same time, the spinning member 109, the elastic yarn supply device 123, the draft device 107, etc. are stopped, and the winding is interrupted. Thereafter, the control unit 157 of the spinning unit 102 causes the yarn splicing carriage 103 to self-travel to the position of the spinning unit 102. When the yarn joining cart 103 arrives at the position of the spinning unit 102, the driving of the spinning member 109, the elastic yarn supplying device 123, etc. is resumed, and the yarn joining cart 103 performs a predetermined yarn joining operation, so that the spinning side The core yarn 110 and the core yarn 110 on the package 145 side are spliced.

Note that the drive voltage of the light projecting unit 137 can be changed by the variable voltage source 147, and the light projecting control unit 155 of the slab catcher controller 151 is connected to the variable voltage source 147. With this configuration, even if deterioration or temperature drift of the light projecting unit 137 occurs, the voltage value that the variable voltage source 147 gives to the light projecting unit 137 is changed so that the light projecting control unit 155 compensates for it. It has become. As a result, stable yarn defect detection is realized. [0081] The doffing cart 104 is provided independently of the yarn splicing cart 103, and as shown in FIGS. 5 and 6, along the traveling path 186 provided in the front portion of the spinning machine 101 main body. The spinning unit 102 can run in the direction in which it is arranged. The traveling direction of the doffing carriage 104 is elongated along the direction in which the spinning units 102 that are the same as the yarn joining carriage 103 are arranged. Further, the doffing carriage 104 is arranged so as to face each spinning unit 102 on the front side across the traveling path of the core yarn 110.

As shown in FIG. 5 and FIG. 6, the doffing carriage 104 has a carriage casing 185 that can travel on the traveling path 186 by traveling wheels 187. The carriage casing 185 is provided with a suction pipe 188 as a core yarn capturing means, a chuck 189, and a bunching device (not shown). The suction pipe 188 is provided on the carriage casing 185 so as to be able to be lifted and retracted in order to catch the yarn end discharged from the spinning member 109 while sucking it and guide it to the take-up device 112. A chicker 189 is rotatably provided in the cart casing 185 in order to supply an empty bobbin 148 to the scraping device 112.

[0083] Further, a guide 158 is installed in the upper part of the carriage casing 185, and thereby guides the core yarn 110 to the slab catcher 135 during the doffing operation. The detailed configuration of this guide 158 will be described later.

A mounting area 195 for a full package 145 is set in front of the traveling path 186 of the doffing cart 104. On the other hand, as shown in FIG. 5, the bogie casing 185 of the doffing bogie 104 is configured in a front view gate type and includes a knock passage 193. As shown in FIG. 6, the package passage 193 is provided with an inclined floor 194 that becomes lower as it approaches the mounting area 195 described above. In this configuration, the full package 145 removed by releasing the pinching of the bobbin 148 of the scraping device 112 passes through the inside of the package passage 193 on the inclined floor 194, and is placed in the mounting area 195. It falls into the shallow groove 196 formed in and stops. The full package 145 thus moved to the placement area 195 is collected by the worker and sent to the next process.

Next, the doffing operation (doffing service) by the doffing cart 104 will be described with reference to FIG. [0086] Among the plurality of spinning units 102, when a sensor (not shown) detects that the package 145 is full in a spinning unit 102, the controller of the spinning machine 101 detects the back of the draft device 107. The roller 114, the third roller 115, and the spinning member 109 are stopped, and the rotational driving of the package 145 is stopped in the scraping device 112. Then, a signal is sent to the doffing cart 104, and it travels to the front of the spinning unit 102. FIG. 6 shows a state where the doffing carriage 104 has traveled to the target spinning unit 102 and stopped. It is also possible to output a full warning signal from the spinning unit 102 when the knock-up has been wound up to near full, and move the doffing cart 104 to the corresponding unit 102 in advance and wait. It is.

[0087] After the doffing cart 104 is stopped, the doffing cart 104 releases the support state of the full package 145 by appropriately operating the towing device 112 as shown in FIG. The full package 145 removed from the harvesting device 112 rolls on the inclined floor 194, passes through the package passage 193 in the doffing cart 104, falls into the groove 196 in the mounting area 195, and is stationary. To do.

[0088] Almost simultaneously with the removal of the full package 145, the doffing carriage 104 rotates the suction pipe 188 obliquely upward and is extended by a pneumatic cylinder (not shown), and the suction port thereof is the delivery roller of the yarn feeder 111. 139 and move to just downstream of the top roller 140 (FIG. 8). Then, the core yarn 110 spun on the spinning member 109 side is sucked and captured.

Further, as shown in FIG. 9, the chucker 189 sets an empty bobbin 148 that is stocked in the inside of the carriage casing 185 and is not wound with a thread, on the scooping device 112. Further, the suction pipe 188 in the extended state is retracted as shown in FIG. 9 and rotated downward to suck in the yarn end of the yarn spun from the spinning member 109 and The bobbin 148 is guided to the vicinity, and a bunch scissor device (not shown) is used to bunch the bobbin 148 to attach the thread! /.

At this time, as shown in FIG. 9, the guide 158 of the carriage casing 185 advances so as to project to the spinning unit 102 side, and is stretched between the yarn feeder 111 and the suction pipe 188. The core yarn 110 is guided by the guide plate 173 at the tip so that the yarn path passes through the detection portion of the slab catcher 135. In this state, the slab catcher 13 The presence / absence of the core yarn of the core yarn 110 according to 5 is determined. This core yarn presence / absence determination method will be described later.

[0091] Immediately after the end of the above-described bunch dredging, the doffing cart 104 brings the empty bobbin 148 into contact with the drive drum 179 and resumes the core yarn 110 scraping. This completes the doffing operation (doffing service), and the chicakka 189 and the suction pipe 188 and the guide 158 return to the initial positions shown in FIG. The operation of the choker 189, the suction pipe 188 and the guide 158 described above is a series of movements by the camshaft (not shown) supported by the doffing carriage 104 being driven by an electric motor (not shown). As done.

Next, determination of the presence or absence of the core yarn of the core yarn 110 by the slab catcher 135 will be described. FIG. 10 is a block diagram of a slab catcher that functions as a core yarn presence / absence determining means, and corresponds to FIG.

That is, as described above with reference to FIG. 6 and FIG. 7, the slab catcher 135 is provided for detecting a yarn defect when the core yarn 110 is wound by the winding device 112. It also functions as a determination device that determines whether or not the elastic yarn 122 is contained in the core yarn 110 during the doffing service of the full package. Hereinafter, this configuration will be described.

That is, at the time of the doffing service by the above-described doffing cart 104, the spinning-side core yarn 110 sucked and captured by the suction pipe 188 is drawn downward for the bunch rod 1S. As shown in FIG. 9, when the guide 158 of the doffing carriage 104 advances to the spinning unit 102 side, it is guided so as to pass through the detection unit of the slab catcher 135 and the cutter device 136. As a result, as shown in FIG. 10, the core yarn 110 continuously spun from the spinning member 109 is fed by the yarn feeding device 111 and passes through the light projecting portion 137 of the cutter device 136 and the slab catcher 135. It will be sucked into the suction pipe 188.

[0095] Here, the core yarn 110 of the present embodiment is spun by winding the fiber bundle 108 around the elastic yarn 122 as a core yarn in a stretched state. It shrinks in the length direction and slightly expands in the radial direction. Further, the core yarn 110 exhibits a sharpness due to the elastic force of the elastic yarn 122. In particular, if the suction force of the suction pipe 188 is set to be weak, it is weakened between the yarn feeder 111 and the suction noise 188. As the core yarn 110 is stretched, its radial expansion tendency and sharpening tendency appear more strongly.

[0096] Therefore, when the normal core yarn 110 passes through the slab catcher 135 between the yarn feeder 111 and the suction pipe 144 during doffing, the area of the shadow formed on the light receiving unit 138 increases, and The output voltage of the part 138 increases. In addition, due to the above-described margin, fluctuation (variation) in the output voltage of the light receiving unit 138 increases. On the other hand, when a defective core yarn having no elastic yarn 122 spun for some reason is spun from the spinning member 109, the radial expansion tendency as described above does not appear. The output voltage of 138 hardly increases. In addition, since there is almost no blurring, the fluctuation of the output voltage of the light receiving unit 138 is small.

Using this, the slab catcher controller 151 stores the threshold voltage for core yarn presence / absence determination in the storage unit 152 in addition to the threshold for yarn monitoring as described above, and inputs it from the light receiving unit 138. The comparison unit 153 determines whether the applied voltage value exceeds the threshold value. As a result, if the voltage value is equal to or higher than the threshold value, it is determined that the elastic yarn 122 is included and the core yarn 110 is normal, and if the voltage value is below the threshold value, the elastic yarn 122 is included and the core yarn is not satisfactory. Judgment is made.

[0098] When it is determined that the elastic yarn 122 has entered! / Inferior and a bad core yarn, the control unit 156 of the slab catcher controller 151 sends a core yarn absence detection signal to the control unit 157 on the spinning unit 102 side. send. Upon receiving this, the spinning unit 102 immediately cuts the defective core yarn with the cutter device 136, notifies the abnormality, stops, and prompts the operator to remove the abnormality.

[0099] The determination principle of the presence / absence of the core yarn is substantially the same as the determination of the presence / absence of the core yarn performed at the time of yarn joining in the first embodiment described above (see the experimental result in FIG. 4). Therefore, also in the second embodiment, the presence or absence of the elastic yarn 122 as the core yarn can be accurately detected.

Next, the configuration of the guide 158 for guiding the core yarn 110 to the slab catcher 135 during the doffing will be described in detail with reference to FIG. 11 and subsequent drawings. Figure 11 shows the state of the guide immediately after the doffing operation in the doffing cart is started. It is the seen perspective view. FIG. 12 is a perspective view showing a state in which the guide is also swung in the retracted state force and is extended toward the spinning unit, and the yarn path is brought close by the yarn guide plate. FIG. 13 is a perspective view showing a state in which the pneumatic cylinder is further extended to guide the core yarn to the slab catcher. FIG. 14 is a perspective view showing a state in which the yarn path is removed from the yarn gathering plate force. FIG. 15 is a perspective view showing a state in which the guide for the yarn path is completed.

[0101] As shown in FIG. 11, this guide 158 is installed on the upper surface of the carriage casing 185 of the doffing carriage 104, and has the first arm 161 and the second arm 162 that are stacked one above the other. I have. These two arms 161 and 162 are rotatably supported around a support shaft 167 erected on the upper surface of the carriage casing 185. A drive arm 160 is rotatably provided inside the carriage casing 185, and the tip of the drive arm 160 is connected to one end of the first arm 161 via a rod 168. The drive arm 160 is connected to the force shaft, not shown, for driving the suction pipe 188, the chucker 189, and the like in association with each other.

[0102] The first arm 161 and the second arm 162 are each formed by bending the tip side into a hook shape, and a thread removing plate 171 is provided at the tip of the first arm 161, and the tip of the second arm 162 is provided. A yarn gathering plate 172 is attached to each. The support shaft 167 incorporates an urging panel (not shown) so that the second arm 162 is rotated relative to the first arm 161 in the clockwise direction in FIG. Be energized. However, the rotation is restricted by the protrusion 164 formed on the second arm 162 abutting on the first arm 161.

A pneumatic cylinder 163 is installed on the upper surface of the second arm 162 located on the upper side of the two arms 161 · 162. A guide plate 173 for guiding the yarn path is fixed to the tip of the movable portion of the pneumatic cylinder 163. A guide groove 174 into which the core yarn 110 can be inserted is formed at the cylinder extension side end of the guide plate 173.

[0104] With the above configuration, FIG. 11 shows a state in which the suction pipe 188 of the doffing carriage 104 is retracted while capturing the core yarn 110 while sucking the wick I. As shown in FIG. 11, the guide 158 retreats without protruding from the upper part of the doffing cart 104 until the tip of the succession pipe 188 passes in front of the slab catcher 135 and descends further downward. The state is maintained. [0105] Immediately after the tip of the suction pipe 188 passes downward in front of the slab catcher 135, the drive arm 160 is driven by a camshaft (not shown). As shown in FIG. Then, the first arm 161 is pulled through the rod 168 and rotated. The second arm 162 is also rotated so as to follow the first arm 161 by an urging panel built in the support shaft 167. As a result, the yarn guide plate 172 of the second arm 162 comes into contact with the core yarn 110 and moves its yarn path slightly to the right. In this state, the yarn removing plate 171 of the first arm 161 is not in contact with the yarn path.

In the state shown in FIG. 12, the pneumatic cylinder 163 is in a retracted state, and the above-described guide plate 173 is located slightly in front of the yarn path of the core yarn 110 (on the doffing carriage 104 side). In FIG. 12, the force illustrated so that the yarn path of the core yarn 110 and the guide groove 174 of the guide plate 173 overlap each other. In the state of FIG. 12, the core yarn 110 has not yet been inserted into the guide groove 174.

[0107] At the timing shown in Fig. 12 when the above-described two arms 161 · 162 have finished turning and the arms 161 · 162 2 have protruded from the doffing carriage 104, compressed air is supplied to the pneumatic cylinder 163, and the pneumatic cylinder 163 extends. As a result, as shown in FIG. 13, the guide plate 173 advances while the core yarn 110 is inserted into the guide groove 174, and is positioned just below the slab catcher 135 on the spinning unit 102 side. As a result, the core yarn 110 delivered from the yarn feeder 111 is guided by the guide plate 173 and the guide groove 174 so as to pass through the cutter device 136 and the slab cutter 135.

Immediately after advancement of the guide plate 173, the drive arm 160 further rotates the first arm 161 through the rod 168. The second arm 162 also attempts to rotate following the biasing panel built in the support shaft 167, but the rotation is fixed to the upper surface of the trolley casing 185, the regulation protrusion formed on the second arm 162. It is blocked by touching the stopper 166. As a result, as shown in FIG. 14, only the first arm 161 turns slightly, and the thread removing plate 171 at the tip thereof contacts the core yarn 110, and the yarn path is moved further to the right side. The second arm 162 comes off the thread guide plate 172. The first arm 161 is swung back (thread removal operation) in a short time. As a result, as shown in FIGS. 15 and 9, the core yarn 110 is guided only by the guide groove of the guide plate 173. It becomes. Figure The core yarn presence / absence determination shown in FIG. 10 is performed until the first arm 161 is returned to its original state.

[0109] The above is the guide operation for the core yarn 110 for determining the presence or absence of the core yarn of the guide 158. After the presence or absence of the core yarn by the slab catcher 135, the pneumatic cylinder 163 is retracted and the guide plate 173 is doffed. The core yarn 110 is pulled out from the guide groove 174 of the guide plate 173 by being pulled back to the cart 104 side. Then, the two arms 161 and 162 are turned by the driving arm 160 so as to return to the original retracted position. Thus, the series of operations of the guide 158 is completed, and the guide 158 returns to the retracted state of FIG.

[0110] It should be noted that the guide to the core yarn 110 by the guide 158 is completed at a stage before the completion of the doffing operation of the doffing carriage 104 (referring to a series of operations including collection of a full package and a bunch basket). Thus, more specifically, the operation timing of each arm 161 · 162 and the pneumatic cylinder 163 is determined so that the bunch by the above-described bunch device is completed. That is, the presence / absence determination of the core yarn can be performed simultaneously during the doffing operation, and the working time is shortened. In particular, by setting the timing to end the core yarn presence / absence determination by the slab catcher 135 at the time before the bunch wrinkle, the work time can be made almost zero. Even when the slab catcher 135 determines that the core yarn has no core yarn, the abnormal force can be easily restored because the slab catcher 135 is in a state before the bunch.

[0111] As described above, in the core yarn spinning machine 101 of the present embodiment, the core yarn presence / absence determining means for determining the presence or absence of the core yarn of the core yarn 110 at the time of the doffing service by the doffing cart 104 is provided. The core yarn 110 is guided to the slab catcher 135. Accordingly, it is possible to perform the core yarn presence / absence determination operation in parallel during the doffing operation, and it is possible to reliably detect the absence of the core yarn of the core yarn without increasing the operation stop time of the spinning unit 102.

[0112] Further, the guidance of the core yarn 110 to the slab catcher 135 is performed at the timing before the end of the doffing service. Therefore, it becomes easy to finish the core yarn presence / absence determination of the core yarn 110 during the doffing service time, and an increase in the take-up stop time of the spinning unit 102 can be suppressed.

[0113] More specifically, the slab catcher 135 has a core yarn presence / absence judgment capability. By doing so at the timing before starting, the increase in the take-up stop time of the spinning unit 102 can be made zero. In addition, since the presence or absence of core yarn is determined at the timing before the doffing service is finished and recapture is resumed, even if the determination of no core yarn is made by the slab catcher 135, it is easy to recover abnormal force It is.

[0114] In addition, the doffing truck 104 that performs the above-described doffing service captures the core yarn 110 by the suction pipe 188 in the doffing service for the spinning unit 102, and the captured core yarn 110 is moved to the spinning unit 102 side. The slab catcher 135 installed in That is, when the doffing carriage 104 captures the core yarn 110 by the suction pipe 188 for doffing, the core yarn 110 can be easily guided to the slab catcher 135 of the spinning unit 102. Therefore, the presence or absence of the elastic yarn 122 by the slab catcher 135 can be reliably determined.

[0115] Further, the slab catcher 135 is provided in the spinning unit 102, and the doffing carriage 104 is arranged to face the spinning unit 102, and the core yarn 110 is placed on the slab catcher 104 on the doffing carriage 104 side. A movable guide 158 for guiding to 135 is provided. Therefore, by moving the guide 158, the core yarn 110 can be easily guided from the doffing carriage 104 to the slab catcher 135 on the spinning mute 102 side facing it.

[0116] Further, the guide 158 is configured to be retracted to the doffing cart 104 side except during doffing work. Therefore, except when guiding the core yarn 110, the guide 158 is retracted to the hoisting carriage 104 side as shown in FIG. 11 and FIG. 8, so the traveling core yarn 110, spinning unit 102, and yarn joining carriage 103 side. Interference between the parts and the guide 158 is avoided, and the core yarn spinning machine 101 can be operated smoothly. This effect is exhibited particularly well when the doffing device (doffing carriage 104) is configured to run between a plurality of spinning units 102 as in this embodiment. That is, since the guide 158 is retracted when the doffing carriage 104 travels, the guide 158 is prevented from interfering with the parts on the spinning unit 102 side, and the running of the doffing carriage 104 and the operation of each spinning unit 102 are prevented. Become smooth.

[0117] Further, the guide 158 is configured to capture the core yarn 110 and guide it to the slab catcher 135 by the turning operation and the extension operation of the core yarn 110 toward the yarn path. Therefore, to the slab catcher 135 on the spinning unit 102 side facing the doffing cart 104, I can guide the core yarn 110. Further, in the retracted state before turning and extending, the guide 158 can be stored in a compact space as shown in FIG. 11, and the doffing carriage 104 can be easily downsized.

Furthermore, the core yarn presence / absence determining means also serves as a slab catcher 135 installed on the spinning unit 102 side for detecting yarn defects. Therefore, it is not necessary to provide a special device for determining the presence or absence of the core yarn, and the configuration is further simplified.

[0119] The core yarn spinning machine 101 of the present embodiment has a plurality of spinning units 102, and the doffing carriage 104 is configured to be able to travel between the plurality of spinning units 102. Therefore, the doffing service for a plurality of spinning units 102 can be handled by one doffing cart 104, and the configuration is further simplified by reducing the number of doffing devices required. Therefore, the manufacturing cost can be reduced.

[0120] The preferred embodiment of the present invention has been described above, but the technical scope of the present invention is not limited to the above configuration, and can be implemented with the following modifications, for example.

[0121] (1) The service in the core yarn spinning machine is not limited to the doffing service, and for example, a yarn splicing service can be considered. That is, a yarn splicing cart that can travel along the above-described travel path 186 (that is, so as to face the spinning unit 102) may be provided, and the yarn splicing cart may be provided with the guide 158. In this case, it is preferable that the guide of the yarn path to the slab catcher 135 is performed by the guide 158 at the timing before the yarn joining service by the yarn joining cart is completed.

[0122] (2) Further, the core yarn presence / absence determining means in the second embodiment described above is a force used in combination with the slab catcher 135 as in the first embodiment. Separate from 135, a core yarn presence / absence determining means may be provided.

[0123] (3) In the above embodiment, when determining the presence or absence of the core yarn, whether or not the output voltage of the light receiving unit 138 corresponding to the size of the contour (contour thickness) exceeds the predetermined threshold is determined. For example, the slab catcher controller 151 has a function of calculating the fluctuation of the output voltage of the light receiving unit 138, for example, the standard deviation, and the core yarn is determined depending on whether or not the fluctuation exceeds a predetermined threshold value. You may determine the presence or absence of. Further, the presence / absence of the core yarn may be determined in combination with both the thickness of the core yarn detected by the light receiving unit 138 and its fluctuation. Here The “outline thickness” in this case refers to the distance between the outlines of the shadows seen when viewed from the radial direction that is not the actual thickness of the core yarn 110.

(4) The slab catcher as the yarn defect detector or the core yarn presence / absence determination device is not limited to the so-called photoelectric type in the second embodiment, as in the first embodiment. For example, a capacitive slab catcher can be employed.

(5) The guide 158 is a force that guides the core yarn 110 by turning operation → extension operation. For example, the guide 158 guides the core yarn 110 only by turning operation or extension operation. You can also However, it is preferable that the turning operation and the extension operation are sequentially performed as in the above-described embodiment in that the guide 158 at the retracted position can be accommodated in a compact space without interfering with other components.

[0126] (6) The doffing carriage 104 is configured to be able to travel between the spinning units 102. However, the doffing apparatus is not limited thereto, and the doffing apparatus may be simply arranged so as not to move.

[0127] (7) The present invention is not limited to the spinning machine including the spinning member having the above-described configuration, and can be applied to a spinning machine including a spinning member having another configuration.

(8) The present invention is not limited to the determination of the presence / absence of the core yarn in the doffing operation of the doffing carriage 104, and includes the determination of the presence / absence of the core yarn in the yarn joining operation of the yarn joining carriage 103. In this case, the guiding means corresponds to the suction pipe 144. In other words, “service” includes both yarn splicing and doffing.

Claims

The scope of the claims

[1] In a core yarn spinning machine comprising a spinning device for spinning a core yarn and a winding device for winding the spun core yarn,

Core yarn presence / absence determining means for determining the presence / absence of the core yarn of the core yarn, and the force before starting the winding of the core yarn by the winding device after starting the spinning of the core yarn in the spinning device And a core yarn spinning machine, wherein the spun core yarn is introduced into the core yarn presence / absence determining means.

[2] The core yarn spinning machine according to claim 1, wherein when the core yarn is introduced into the core yarn presence / absence judging means, the core yarn is started to be scraped by the scraping device when the core yarn is introduced. A core yarn spinning machine characterized by the fact that the presence of the core yarn becomes more apparent than later.

[3] The core yarn spinning machine according to claim 2, wherein the core yarn of the core yarn is an elastic yarn, and the core yarn presence / absence determining means has a thickness of the core yarn or a variation thereof larger than a threshold value. It is determined that the core yarn is present, and the presence of the core yarn is manifested by reducing the tension of the core yarn or slackening the core yarn from the time after the start of the winding. The core yarn spinning machine that is the feature.

[4] The core yarn spinning machine according to any one of claims 1 to 3, wherein the core yarn presence / absence determining means is also a yarn monitoring means at a time after the start of the winding, and the presence / absence determination of the core yarn The core yarn spinning machine is characterized in that the means has a threshold value for determining the presence / absence of a core yarn separately from the threshold value for monitoring the yarn at the time after the start of winding.

[5] In the core yarn presence / absence determination method for determining the presence or absence of the core yarn in the core yarn,

The core yarn that makes the presence of the core yarn more obvious than in the normal state is led to a detection unit that detects the thickness of the core yarn,

A core yarn presence / absence determination method characterized by determining that the core yarn is present when the thickness of the core yarn detected by the detection unit or the variation thereof is larger than a predetermined value.

[6] The core yarn presence / absence determination method of the core yarn according to claim 5,

The core yarn of the core yarn is 弹 ¾ yarn, The core yarn presence / absence determination method is characterized in that the manifestation of the presence of the core yarn is performed by weakening the tension of the core yarn or loosening the core yarn from a normal state.

[7] A service method in a core yarn spinning machine, characterized in that at the time of the service, the core yarn is guided to a core yarn presence / absence judging means for judging the presence / absence of the core yarn in the core yarn. Method.

[8] The service method according to claim 7, wherein the service is performed at a timing before the end of the service.

[9] The service method according to claim 8, wherein the determination of the presence / absence of a core yarn by the core yarn presence / absence determining means is performed at a timing before the service ends. Service methods in

[10] In a core yarn spinning machine having a unit for spinning and winding a core yarn, and a service device for providing a service to the unit,

A core yarn presence / absence determining means for determining the presence or absence of the core yarn of the core yarn;

Guiding means for capturing the core yarn at the time of service to the unit, and guiding the captured core yarn to the core yarn presence / absence determining means;

Core yarn spinning machine, characterized in that

[11] The core yarn spinning machine according to claim 10, wherein the core yarn presence / absence determining means is provided in the unit, the service device is arranged facing the unit, and the guiding means A core yarn spinning machine characterized in that a movable guide for guiding to the core yarn presence / absence determining means is provided on the service device side.

[12] The core yarn spinning machine according to claim 11, wherein the guide is sometimes retracted to the service device side when the service is not performed.

[13] The core yarn spinning machine according to claim 12, wherein the guide captures the core yarn by turning and retracting to the yarn path side of the core yarn, and the presence or absence of the core yarn. A core yarn spinning machine characterized by being guided to a judging means.

[14] The core yarn spinning machine according to any one of claims 10 to 13, wherein the core yarn presence / absence determining means also serves as a yarn defect detecting means installed on the unit side. Core yarn spinning machine.

[15] The core yarn spinning machine according to any one of claims 10 to 14, wherein a plurality of units are arranged in parallel, and the service device is configured to be able to travel between the plurality of units. Core yarn spinning machine characterized by