JP2009220974A - Package monitor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To monitor a package surface state during winding up a yarn by using a light emitting element and a light receiving element, and restrain a detection error at a defective yarn part that causes irregular reflection of light on a drum surface. <P>SOLUTION: The package monitor device 25 that monitors a surface of the package P during winding up a yarn includes the light emitting element 26 that emits light along the surface of the package P and the light receiving element 27 that receives light from the light emitting element 26. The light emitting element 26 and the light receiving element 27 are located at positions apart from around a contact point between the package P and a traversing drum 13 to be abutted to the package P in a circumference direction of the package P. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a package monitoring apparatus that monitors a surface of a package during winding of a yarn in a yarn winding machine that forms a package by winding the yarn around a winding tube.

  2. Description of the Related Art Conventionally, an automatic winder is known as a yarn winding machine that forms a package by winding a yarn around a winding tube. As disclosed in Patent Document 1, the automatic winder is based on a yarn defect detection device that detects and removes a defect present in a yarn unwound from a yarn feeding bobbin, and at the time of yarn breakage or by a yarn defect detection device. Two yarn end catching means for catching the yarn end on the package side and the yarn end on the yarn feeding bobbin side at the time of yarn defect removal (yarn cutting), and two pieces captured by the two yarn end catching means, respectively. A yarn joining device that joins the yarn, and a drive drum (traverse drum) that contacts the surface of the package formed on the winding tube supported by the cradle arm and that rotationally drives the package by contact friction are provided.

  Here, during the formation of the package (during winding of the yarn), the defect of the yarn itself is removed by the yarn defect detection device, so that it is not normal that a defective package is generated due to the yarn defect. However, it can be assumed that a defective package is generated when a yarn defect other than the defect of the yarn itself is mixed in the package. For example, when catching a yarn end on the package side by a yarn end catching means (suction mouse) at the time of yarn joining by a yarn joining device after yarn breakage or removal of a yarn defect, the yarn end is caught and simultaneously wound on the package. By pulling out the thread that has been pulled out (double lead), the thread jumps out of the package surface. It is also conceivable that lint floating around the surface adheres to the package surface. When such a yarn portion (defective yarn portion) jumping out from the surface of the package is wound around the package and once mixed inside the package, such a defective yarn portion is discovered before proceeding to the next process (that is, It is difficult to determine that the package is defective.

  Therefore, Patent Documents 1 to 3 disclose an apparatus for monitoring whether a defective yarn portion is present on the surface of the package during the formation of the package. This package monitoring device has a light emitting element and a light receiving element, and detects a defective yarn portion protruding from the surface of the package depending on whether or not light emitted from the light emitting element along the package surface is received by the light receiving element. It is possible to do. The light emitting element and the light receiving element are provided in the vicinity of the contact point between the package and the drum so that the detection position does not have to be changed according to the change in the winding diameter of the package.

JP-A-9-328256 Japanese Utility Model Publication No. 2-147468 Japanese Patent Laid-Open No. 10-182005

  In the above-described conventional package monitoring apparatus, the light emitting element and the light receiving element are provided near the contact point between the package and the traverse drum, so that the light emitted from the light emitting element is irregularly reflected on the surface of the traverse drum and is received by the light receiving element. The amount of light received is reduced. In this case, even in a normal state where there is no defective yarn portion on the package surface, it is determined that the light from the light emitting element is blocked by the yarn and the amount of received light is reduced. There is a risk that it will be mistakenly determined to be.

  FIG. 12 is a diagram showing a change in the package peripheral surface due to the package P being thickened. As shown in FIG. 12, the cradle arm that supports the package P increases in inclination as the package P becomes thicker, and the center of the package P moves to one side (left side in the figure) as indicated by a one-dot chain line in the figure. Move. Accordingly, in the vicinity of the contact point between the package P and the traverse drum 100, which is the sensing position of the light emitting element 101 and the light receiving element 102, the peripheral surface is shifted to the left in the drawing as the package P becomes larger in diameter. Move away from the sensing position. That is, when the sensing position of the light emitting element 101 and the light receiving element 102 is in the vicinity of the contact point between the package P and the drum 100, the detection accuracy of the defective yarn portion on the surface of the package P having a larger diameter is reduced. There is a problem.

  An object of the present invention is to monitor a package surface state during winding of a yarn using a light emitting element and a light receiving element, and to suppress erroneous detection of a defective yarn portion due to irregular reflection of light on the drum surface.

Means for Solving the Problems and Effects of the Invention

A package monitoring device according to a first aspect of the present invention is a package monitoring device for monitoring the surface of a package during yarn winding of a yarn winding machine for winding a yarn around a winding tube to form a package.
A light-emitting element that emits light along the surface of the package; and a light-receiving element that receives light from the light-emitting element, and the sensing position by the light-emitting element and the light-receiving element is both in the package and the package. It is arrange | positioned in the position away in the circumferential direction of the said package from the contact vicinity with the drum which contacts.

  According to this configuration, the light emitting element and the light receiving element are located at positions away from the vicinity of the contact point between the package and the drum in the circumferential direction of the package. Therefore, irregular reflection of the light emitted from the light emitting element on the surface of the drum is reduced, and a decrease in the amount of light received by the light receiving element is suppressed. Therefore, it is possible to prevent a normal package having no defective yarn portion from being erroneously detected as a defective package.

  In the present invention, the term “defective yarn portion” refers not only to the yarn portion that is wound on the package or connected to the yarn to be wound from now on, but is not connected to the yarn to be wound from the outside. Including attached lint etc.

  In the package monitoring device according to a second aspect of the present invention, in the first aspect, the sensing position by the light emitting element and the light receiving element is arranged at a position where the distance from the package surface is smaller than the distance from the drum surface. It is characterized by being.

  According to this configuration, since the light emitting element and the light receiving element are disposed closer to the package surface than the drum surface, it is possible to prevent erroneous detection of a defective yarn portion due to irregular reflection of light on the drum surface.

According to a third aspect of the present invention, in the first or second aspect, the yarn winding machine moves to the vicinity of the surface of the package at the time of yarn breakage or yarn cut, and Having yarn end catching means for catching,
The sensing position by the light emitting element and the light receiving element is located at a position farther in the circumferential direction of the package than the yarn end catching position of the yarn end catching means from the contact point of the package and the drum. It is.

  In order to perform yarn splicing at the time of yarn breakage or at the time of yarn cutting when removing the yarn defect, the yarn end catching means moves to the yarn end catching position near the contact point between the package and the drum, and the yarn on the package side Capture the edge. At this time, since the light emitting element and the light receiving element are separated from the contact between the package and the drum in the circumferential direction of the package rather than the yarn end catching position of the yarn end catching means, the yarn end catching means moved to the yarn end catching position is It does not interfere with the light emitted from the light emitting element. Therefore, erroneous detection of the defective yarn portion due to light being blocked by the yarn end capturing means at the time of capturing the yarn end does not occur, and detection of the defective yarn portion is stopped at the time of capturing the yarn end in order to prevent such erroneous detection. Such control is also unnecessary.

  In the package monitoring device according to a fourth aspect of the present invention, in any one of the first to third aspects, at least a predetermined amount of yarn is wound around the winding tube at a sensing position by the light emitting element and the light receiving element. The defective yarn portion protruding from the surface of the package in proximity to the surface of the package within a predetermined separation distance range can be detected.

  When the light-emitting element and the light-receiving element are at positions away from the contact points between the package and the drum in the package circumferential direction, the distances between the light-emitting element and the light-receiving element and the surface of the package change according to changes in the winding diameter of the package. Therefore, when the positions of the light emitting element and the light receiving element are fixed, it is difficult for the light emitting element and the light receiving element to be close to the package surface and accurately detect the defective yarn portion in all winding diameter ranges. The defective yarn portion can be detected only in a specific winding diameter range corresponding to the fixed position of the light emitting element and the light receiving element. Therefore, in such a case, the specific winding diameter range is preferably a winding diameter range in which defective yarn portions are particularly likely to occur.

  Here, it is generally known that, as the winding diameter of the package increases, so-called end face drop is likely to occur, in which the yarn falls from the axial end face of the package. One reason for this is considered to be that as the winding diameter increases, the peripheral speed of the surface of the package increases and the centrifugal force acting on the yarn increases. As described above, when the end face of the package is dropped, when the yarn end is broken and the yarn end catching means catches the yarn end on the package side, the thread end catching means is fallen together with the thread end to be originally caught. Threads are also captured at the same time, and double threading is likely to occur, and defective yarn portions are likely to occur on the package surface. Therefore, when the winding diameter of the package that enables detection of defective yarn portions is limited to a certain range, especially when a certain amount of yarn is wound up and the winding diameter of the package increases, It is preferable that the light emitting element and the light receiving element are arranged so that the defective yarn portion can be reliably detected with respect to the surface.

  In the package monitoring device according to a fifth aspect of the present invention, in any one of the first to fourth aspects of the invention, the sensing position by the light emitting element that detects the defective yarn portion and the light receiving element depends on a change in the winding diameter of the package. Accordingly, the position can be changed.

  According to this configuration, since the positions of the light emitting element and the light receiving element that detect the defective yarn portion can be changed according to the change in the winding diameter of the package, the winding diameter of the package that enables accurate detection of the defective yarn portion. The range expands.

  Next, an embodiment of the present invention will be described. This embodiment is an example in which the present invention is applied to an automatic winder provided with a number of winding units that wind a yarn unwound from a yarn supplying bobbin around a winding tube to form a winding package. FIG. 1 is a front view showing a schematic configuration of an automatic winder according to the present embodiment, and FIG. 2 is a front view of one winding unit of the automatic winder.

  As shown in FIGS. 1 and 2, the automatic winder 1 can run in a row along a large number of winding units 2 (yarn winding machines) arranged in a row and along these many winding units 2. The doffing device 3 provided in the machine 1 and the machine control device 4 that controls the entire automatic winder 1 are provided. The machine base control device 4 is disposed on one end side of the winding units 2 in the row direction.

  Then, the automatic winder 1 sends a command from the machine control device 4 to the winding unit control devices 30 of a number of winding units 2, and the yarns unwound from the yarn feeding bobbins in each winding unit 2. Is wound around a winding tube to form a package. When a full package is formed in a certain winding unit 2, the doffing device 3 moves over the winding unit 2 and replaces the full package with an empty winding tube. .

  Next, the detailed configuration of each winding unit 2 will be described. FIG. 3 is a side view of the upper portion of the winding unit 2. The winding unit 2 shown in FIGS. 2 and 3 winds the spun yarn unwound from the yarn feeding bobbin B while winding it around the winding tube 11 to form a package P having a predetermined length and a predetermined shape. .

  The winding unit 2 includes a unit frame 10 as a machine base, a cradle 12 that is provided on the unit frame 10 and rotatably holds the winding tube 11, and a traverse drum that is rotatably supported by the unit frame 10. 13. As shown in FIGS. 2 and 3, on the front surface of the upper end portion of the unit frame 10, a notification unit 14 made of a lamp, a buzzer, or the like is provided to notify the operator that the winding unit 2 is in an abnormal state. Is provided.

  As shown in FIG. 3, the cradle 12 includes two holders 15 that rotatably hold both ends of the winding tube 11 and two holders 15 on both sides in the axial direction of the winding tube 11 (package P). Two cradle arms 16 to support are provided.

  The traverse drum 13 is formed of a metallic material having a glossy surface, and is rotationally driven by a drum drive motor 40 (see FIG. 6) stored in the unit frame 10. A spiral traverse groove 13a is formed on the circumferential surface of the traverse drum 13, and the spun yarn Y is traversed by the traverse groove 13a. The winding unit 2 rotates in a state where the traverse drum 13 is in contact with the package P formed on the winding tube 11 while traversing the spun yarn Y by the traverse groove 13a. The package P is rotated by contact friction with the bobbin 13 and the yarn unwound from the bobbin B is wound up.

  Further, as shown in FIG. 2, in the yarn traveling path between the yarn feeding bobbin B and the traverse drum 13, the unwinding assisting device 17, the yarn feeler 18, and the tension applying device 19 are sequentially arranged from the yarn feeding bobbin B side. A yarn joining device 20 and a yarn clearer 21 (yarn defect detecting device) are provided.

  The unwinding assisting device 17 assists the unwinding of the yarn from the yarn supplying bobbin B by lowering the cylindrical body covering the core tube together with the unwinding of the yarn supplying bobbin B. The yarn feeler 18 detects the presence or absence of the spun yarn Y between the unwinding assisting device 17 and the tension applying device 19. The tension applying device 19 applies a predetermined tension to the traveling spun yarn Y. In the example shown in FIG. 2, a gate type in which movable comb teeth 19b are arranged with respect to fixed comb teeth 19a is used. The comb teeth 19b can be swung so that the comb teeth 19b are engaged or opened, and the swiveling is performed by a rotary solenoid.

  The yarn joining device 20 is used to remove the lower yarn and the package on the yarn feeding bobbin B side when the yarn is cut to remove the yarn defect detected by the yarn clearer 21 described below or when the yarn breaks during unwinding. The upper thread on the P side is spliced. FIG. 2 shows a disk splicer having disk-like disk members 20a and 20b as the yarn joining device 20, and the disk members 20a and 20b sandwich the lower thread Y1 and the upper thread Y2. In this state, the disk members 20a and 20b are rubbed together, and the lower yarn Y1 and the upper yarn Y2 are untwisted and twisted to be spliced.

  The yarn clearer 21 is for detecting a defect of the spun yarn Y, and a signal corresponding to the thickness of the spun yarn Y from the clearer is processed by an appropriate analyzer, so that a yarn defect such as a slab is removed. To detect. Further, the clearer 21 is provided with a cutter 21a for cutting a yarn when a yarn defect is detected.

  Above and below the yarn joining device 20, a lower yarn catching guide member 22 that catches and guides the lower yarn Y1 on the yarn feeding bobbin B side and guides it to the yarn joining device 20, and an upper yarn Y2 on the package P side is caught. An upper thread catching guide member 23 for guiding to the device 20 is provided. When the yarn breaks during unwinding or when the yarn clearer 21 cuts the yarn, the suction port 22a of the lower yarn catching guide member 22 catches the yarn end of the lower yarn Y1 at the position shown in FIG. The lower thread Y1 is guided to the yarn splicing device 20 by turning upward. At the same time, the upper yarn catching guide member 23 has its suction mouth 23a (yarn end catching means) from the position shown in FIG. 2 to the yarn end catching position in the vicinity of the contact point between the package P and the traverse drum 13 (FIG. 3). To the position indicated by the two-dot chain line in FIG. 2), the yarn end of the upper yarn Y2 is captured from the package P at this yarn end catching position, and then turned downward again to guide the upper yarn Y2 to the yarn joining device 20. It is like that.

  By the way, when winding of the package P proceeds while the package P is being wound and the defective yarn portion that has jumped out (or adhered) to the surface of the package P is generated, the defective yarn portion is transferred to the package P. May cause a defective package.

  For example, at the time of yarn joining by the yarn joining device 20, which is performed after yarn breakage by the cutter 21a when removing the yarn breakage due to tension fluctuation during winding or the yarn defect detected by the yarn clearer 21, the upper yarn catching guide member 23, the suction mouth 23a moves to the yarn end catching position and catches the yarn end on the package P side. At this time, simultaneously with catching the yarn end, the yarn Y already wound on the package P is also taken. By pulling out (double lead-out), the pulled-out yarn Y may be wound on the package P in a state of jumping out from the surface of the package P.

  In addition, when the tension of the yarn Y unwound from the yarn feeding bobbin B is momentarily reduced, a part of the yarn Y is broken, and the twisted portion (also referred to as “billi”) is wound on the package P. Sometimes. Alternatively, it is conceivable that the yarn waste floating around the winding unit 2 is wound in a state where it adheres to the surface of the package P.

  Therefore, the winding unit 2 of the present embodiment is provided with a package monitoring device 25 that monitors the quality of the surface of the package P (more specifically, the presence or absence of defective yarn portions on the surface of the package P) during winding of the yarn. ing. FIG. 4 is an enlarged top view of the winding unit 2 showing the positional relationship between the package P, the traverse drum 13, and the package monitoring device 25, and FIG. 5 is a left side view of FIG. As shown in FIGS. 2 to 4, the package monitoring device 25 receives light from a light emitting element 26 provided so as to face each other in the horizontal direction on the front side of the winding unit 2 (front side in FIG. 2). And an element 27.

  The light emitting element 26 is disposed on the upper end surface of the unit frame 10 positioned on the right side of the traverse drum 13 and irradiates light horizontally (leftward) along the surface of the package P. On the other hand, the light receiving element 27 is disposed on the end of the drum cover 28 covering the traverse drum 13 opposite to the unit frame 10 (left end in FIG. 2) via the bracket 29 so as to face the light emitting element 26. It is attached. Thus, the light emitting element 26 and the light receiving element 27 are at the same height position, and the straight line (sensing position) connecting the light emitting element 26 and the light receiving element 27 is parallel to the tangent line (tangential plane) between the package P and the drum 13. Yes.

  Thus, when there is no defective yarn portion protruding from the surface of the package P, the light irradiated horizontally from the light emitting element 26 along the surface of the package P is received by the light receiving element 27. On the other hand, as shown by a two-dot chain line in FIG. 5, when the defective yarn portion Yb exists on the surface of the package P, a part of the light emitted from the light emitting element 26 is blocked by the defective yarn portion Yb, By reducing the amount of light received by the light receiving element 27, the defective yarn portion Yb can be detected.

  Here, as in the conventional configuration, when the light emitting element 26 and the light receiving element 27 are provided in the vicinity of the contact point between the package P and the traverse drum 13, the light emitted from the light emitting element 26 is made of metal and has a gloss. There is a problem in that the amount of light that is irregularly reflected on the surface of the drum 13 and received by the light receiving element 27 is reduced. Therefore, in the present embodiment, as shown in FIGS. 4 and 5, the light emitting element 26 and the light receiving element 27 of the package monitoring device 25 are in the vicinity of the contact point between the package P and the drum 13 that contacts the lower surface of the package P. To the package P in a circumferential direction (front diagonally upward). That is, the light emitting element 26 and the light receiving element 27 are disposed so as to be separated from the surface of the drum 13. Therefore, irregular reflection of the light emitted from the light emitting element 26 on the surface of the drum 13 is reduced, and a decrease in the amount of light received by the light receiving element 27 is suppressed. Therefore, the normal package P without the defective yarn portion Yb is a defective package. Is prevented from being detected by mistake.

  In addition, as shown in FIG. 3, the light emitting element 26 and the light receiving element 27 are rotated from below at the time of yarn joining from the contact point of the package P and the drum 13, and the yarn end catching position of the suction mouth 23a of the upper yarn catching guide member 23 Further, it is arranged at a position (upward position) further away in the circumferential direction of the package P. Therefore, the suction mouth 23a that has moved to the yarn end catching position when the upper yarn Y2 catches the yarn end does not interfere with the light emitted from the light emitting element 26. Therefore, erroneous detection due to light being blocked by the suction mouse 23a at the time of capturing the yarn end does not occur, and in order to prevent such erroneous detection, the defective yarn portion caused by the light emitting element 26 and the light receiving element 27 at the time of capturing the yarn end is detected. Control such as stopping detection is also unnecessary.

  As described above, when the light emitting element 26 and the light receiving element 27 are separated from the contact point between the package P and the drum 13 in the circumferential direction, the light emitting element 26 and the light receiving element 27 The distance from the surface of the package P changes slightly. FIG. 6 is a diagram showing a change in the package peripheral surface due to the winding of the package P. As shown in FIG. 6, the inclination angle of the cradle arm 16 increases with the winding thickness of the package P, so that the center of the package P moves rearward (leftward in the figure) as shown by the alternate long and short dash line in FIG. 6. Then, the position of the peripheral surface of the package P changes. However, as described above, even if the distances between the light emitting element 26 and the light receiving element 27 and the surface of the package P are slightly changed according to the change in the winding diameter of the package P, the package 13 is suppressed while suppressing irregular reflection of light on the surface of the drum 13. In order to accurately detect the defective yarn portion Yb protruding from the P surface, the distance between the light emitting element 26 and the light receiving element 27 is always the distance from the surface of the drum 13 regardless of the winding diameter of the package P. It is preferable that it is arranged at a position smaller than that.

  On the other hand, if the light emitting element 26 and the light receiving element 27 are separated too far from the contact point between the surface of the package P and the drum 13 (for example, the top position of the package P (position A in FIG. 5)), the package P The change in the distance between the light emitting element 26 and the light receiving element 27 and the surface of the package P with respect to the change in the winding diameter becomes larger. Therefore, in such a case, the winding diameter range of the package P in which the defective yarn portion Yb can be reliably detected close to the surface of the package P is narrowed. Therefore, it is preferable that the light emitting element 26 and the light receiving element 27 are disposed at positions that are not separated from the contact point in the circumferential direction of the package P. In this case, the change in the distance between the light emitting element 26 and the light receiving element 27 and the surface of the package P with respect to the change in the winding diameter of the package P is reduced, and the winding diameter range of the package P in which the defective yarn portion can be accurately detected. Becomes larger.

  Further, as in the present embodiment, the positions of the light emitting element 26 and the light receiving element 27 are fixed, and a defective yarn portion is detected only within a specific package winding diameter range corresponding to the positions of the light emitting element 26 and the light receiving element 27. If possible, the specific winding diameter range is preferably a winding diameter range in which defective yarn portions are particularly likely to occur.

  Here, it is generally known that as the winding diameter of the package P becomes larger, the yarn Y falls from the end face in the rotation axis direction of the package P, so-called end face drop is likely to occur. One reason for this is considered to be that the centrifugal force acting on the yarn Y wound around the surface of the package P increases as the winding diameter increases. In this way, when the suction mouth 23a captures the yarn end on the package P side for piecing in a state where the end face of the package P has fallen, the suction mouth 23a has the end face together with the yarn end to be originally captured. The fallen yarn Y is also captured at the same time, and double squeezing is likely to occur, and a defective yarn part due to this double squeezing tends to occur.

  Therefore, in particular, the light emitting element 26 and the light receiving element 27 are wound around the winding tube 11 with a predetermined amount or more of yarn (for example, a yarn amount with which the package winding diameter is 50% or more of the maximum package diameter). When the winding diameter becomes sufficiently large, the defective yarn portion that protrudes from the surface of the package P so as to be close to the surface of the package P within a predetermined distance range so as not to cause erroneous detection due to being too close. It is preferable that Yb can be detected.

  An example of a specific sensing position for performing the above detection is shown below. As shown in FIG. 6, a straight line 61 (sensing position) connecting the light emitting element 26 and the light receiving element 27 is a half-winding package P1 (package diameter R is half (R2) of the diameter (R1) of the full-winding package P1. Of a certain package) is included in a virtual vertical surface 60 that hangs down from the frontmost surface, and is located in the vicinity of the peripheral surface of the half-winding package P2. At this position, even if the package diameter changes from the half-winding package P2 to the full-winding package P1, the change in the peripheral surface of the package P is smaller than the vicinity of the contact point between the package P and the drum 13. That is, by setting the sensing position of the light emitting element 26 and the light receiving element 27 to the position shown in FIG. 6, compared to the conventional configuration (see FIG. 11), the defective yarn portion from the half-winding package P2 to the full-winding package P1 is reduced. Detection can be performed with higher accuracy.

  When winding the cone-shaped package P as in the present embodiment, the above-described sensing position may be set for each of the large-diameter side and small-diameter side package diameters. For example, the light emitting element 26 determines the sensing position based on the large diameter side, and the light receiving element 27 determines the sensing position based on the small diameter side. Thus, by determining the sensing position, the sensing position along the package surface is defined, and the entire width of the package surface can be monitored.

  Next, the control configuration of the winding unit 2 will be described. FIG. 7 is a block diagram showing a control configuration of the winding unit 2. A winding unit control device 30 that controls the winding unit 2 is provided in the unit frame 10 (see FIG. 2) of the winding unit 2. The winding unit control device 30 includes a CPU (Central Processing Unit) which is an arithmetic processing unit, a ROM (Read-Only Memory) in which a program executed by the CPU and data used for the program are stored, and program execution It is sometimes composed of a RAM (Random Access Memory) for temporarily storing data and an input / output interface for inputting / outputting data to / from the outside.

  The winding unit control device 30 winds the yarn Y unwound from the yarn supplying bobbin B around the winding tube 11 to form a package P, a yarn winding control unit 31 that controls a series of yarn winding operations, and package monitoring And a quality determination unit 32 that determines the quality of the package P based on a signal from the device 25. The functions of the yarn winding control unit 31 and the quality determination unit 32 are realized by the CPU described above executing a control program stored in the ROM.

  The yarn winding control unit 31 controls the drum drive motor 40 that drives the traverse drum 13 on the basis of a command sent from the machine control device 4 that controls the overall operation of the automatic winder 1, and the traverse drum 13. Thus, the winding tube 11 is rotated to form the package P on the winding tube 11. When the yarn breakage occurs during winding of the yarn, or when the yarn is cut by the cutter 21a to remove the yarn defect detected by the yarn clearer 21, the yarn joining device 20 is controlled. Thus, the upper yarn Y2 on the package P side and the lower yarn Y1 on the yarn feeding bobbin B side are spliced.

  When the defective yarn portion is detected on the surface of the package P by the light emitting element 26 and the light receiving element 27 of the package monitoring device 25, the quality judging unit 32 judges that the quality of the package is bad and takes up the yarn. The yarn winding operation controlled by the control unit 31 is temporarily stopped. At the same time, the quality determination unit 32 operates the notifying unit 14 provided on the unit frame 10 such as a lamp or a buzzer to notify the operator that a defective package has occurred.

  Next, modified embodiments in which various modifications are made to the embodiment will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.

  1] In the above embodiment, the light emitting element 26 and the light receiving element 27 of the package monitoring device 25 are provided on the front side of the winding unit 2 in the direction in which the suction mouth 23a approaches when catching the lower thread. As shown in FIG. 8, the light emitting element 26 and the light emitting element 27 may be provided on the back side of the winding unit 2. In this case, the light emitting element 26 and the light receiving element 27 can be arranged regardless of the yarn end capturing position of the suction mouse 23a.

  2] When the light emitting element 26 and the light receiving element 27 are only one set and the positions thereof are fixed as in the above embodiment, the light emitting element 26 and the light receiving element according to the change in the winding diameter of the package P. Since the distance between the surface 27 and the surface of the package P changes, in some cases, the package winding diameter range in which the defective yarn portion can be detected is limited to a narrow range. Therefore, the light-emitting element 26 and the light-receiving element 27 that detect the defective yarn portion may be configured so that the position can be changed according to the change in the winding diameter of the package P.

  For example, as shown in FIG. 9, the light emitting element 26 and the light receiving element 27 are provided on the cradle arms 16 on both sides supporting the package P, respectively, and the light emitting element 26 or the light receiving element 27 is longitudinally provided on each cradle arm 16. A plurality may be provided in the direction.

  In this embodiment, as shown in FIG. 9A, when the package P has a small diameter, the light emitting element 26a and the light receiving element 27a located on the most distal side (package P side) of the cradle arm 16 are Since it is closest to the surface, the defective yarn portion on the surface of the package P is detected by the pair of light emitting elements 26a and light receiving elements 27a. On the other hand, as shown in FIG. 9B, when the diameter of the package P is increased, the light-emitting element 26b positioned on the base end side (opposite side of the package P) of the cradle arm 16 than the one used when the diameter is small is received. The element 27b is closest to the surface of the package P, and the defective yarn portion on the surface of the package P is detected by the one set of the light emitting element 26b and the light receiving element 27b. That is, as the winding diameter of the package P increases, the positions of the light emitting element 26 and the light receiving element 27 that detect the defective yarn portion are changed to the proximal end side of the cradle arm 16.

  Alternatively, the position of the pair of the light emitting element 26 and the light receiving element 27 can be changed, and the position of the pair of the light emitting element 26 and the light receiving element 27 may be changed according to a change in the winding diameter of the package P. Specific examples of this configuration are given below.

  10 (a) and 10 (b), the light emitting element 26 and the light receiving element 27 are provided on the cradle arms 16 on both sides supporting the package P so as to be movable in the longitudinal direction with respect to the cradle arm 16, respectively. Yes. In addition, as the inclination angle of the cradle arm 16 increases with the winding of the package P, the light emitting element 26 and the light receiving element 27 provided on the cradle arm 16 are pulled through the springs 50, respectively, and the cradle arm 16 is pulled. The position is changed to the base end side of the arm 16.

  Further, in the configuration shown in FIGS. 11A and 11B, the light emitting element 26 and the light receiving element 27 are provided on the cradle arms 16 on both sides supporting the package P so as to be movable in the longitudinal direction with respect to the cradle arm 16. At the same time, the cradle arm 16 is provided with an angle detection sensor 51 for detecting the inclination angle. The light emitting element 26 and the light receiving element 27 provided on the cradle arm 16 are connected to an actuator 52 such as a motor or a hydraulic cylinder that drives the light emitting element 26 and the light receiving element 27 in the longitudinal direction of the cradle arm 16. Has been. Then, the actuator 52 drives the light emitting element 26 and the light receiving element 27 according to the inclination angle of the cradle arm 16 detected by the angle detection sensor 51, so that the light emitting element 26 and the light receiving element 27 are connected to the base of the cradle arm 16. The position is changed to the end side.

  3] In the above embodiment, the drum (the traverse drum 13) that contacts the package P is a drive drum that rotationally drives the package P by frictional contact. However, the drum is provided for purposes other than the purpose of driving the package P by the drum. The present invention can be applied even if it is. For example, driving means such as a motor that directly drives the winding tube 11 is provided separately from the drum, and the drum that contacts the surface of the package P mainly applies contact pressure to adjust the surface shape of the package P. The case where it is provided for the purpose of giving may be sufficient.

  4] As shown in FIG. 2 and FIG. 3, the winding unit of the above embodiment forms a cone-shaped package with one end in the axial direction having a smaller diameter than the other end. A cheese-like package having a constant diameter may be formed.

  5] In the above embodiment, the light emitting element 26 and the light receiving element 27 are provided at both end positions of the package P. However, after the light emitting element 26 and the light receiving element 27 are arranged on one end side of the package, the package and the like are arranged. A reflection member that reflects light from the light emitting element 26 may be provided on the end side, and the light receiving element 27 may receive the light reflected by the reflection member.

1 is a front view schematically showing an automatic winder according to an embodiment. It is a front view of a winding unit. It is a left view of the upper part of a winding unit. It is the upper part enlarged view of a winding unit which shows the positional relationship of a package, a traverse drum, and a package monitoring apparatus. FIG. 5 is a left side view of FIG. 4. It is a figure which shows the change of the package surrounding surface by the winding thickness of a package. It is a block diagram which shows the control structure of a winding unit. It is an upper part enlarged view of the winding unit which concerns on a change form. It is an upper part enlarged view of the winding unit which concerns on another modification, (a) shows a state with a small package diameter, and (b) shows a state with a large package diameter. It is the upper part enlarged view of the winding unit which concerns on another modification, (a) shows a state with a small package diameter, (b) shows a state with a large package diameter, respectively. It is the upper part enlarged view of the winding unit which concerns on another modification, (a) shows a state with a small package diameter, (b) shows a state with a large package diameter, respectively. It is a figure which shows the change of the package surrounding surface by the winding thickening of the package P in a prior art.

Explanation of symbols

2 Winding unit 11 Winding tube 13 Traverse drum 23 Upper thread catching guide member 23a Suction mouse (yarn end catching means)
25 Package monitoring device 26 Light emitting element 27 Light receiving element P Package Y Yarn Yb Defective yarn portion

Claims (5)

A package monitoring device for monitoring the surface of a package during yarn winding of a yarn winding machine for winding a yarn around a winding tube to form a package,
A light emitting element that emits light along the surface of the package, and a light receiving element that receives light from the light emitting element,
The sensing position by the light emitting element and the light receiving element is arranged at a position away from the vicinity of the contact point between the package and the drum contacting the package in the circumferential direction of the package. .   The package monitoring apparatus, wherein a sensing position by the light emitting element and the light receiving element is arranged at a position where a distance from the package surface is smaller than a distance from the drum surface. The yarn winding machine has yarn end catching means that moves near the surface of the package at the time of yarn breakage or yarn cut and catches the yarn end on the package side,
The sensing position by the light emitting element and the light receiving element is located at a position farther in the circumferential direction of the package than the yarn end catching position of the yarn end catching means from the contact point between the front package and the drum. The package monitoring apparatus according to claim 1 or 2.   The sensing position by the light emitting element and the light receiving element is close to the package surface within a predetermined distance range when at least a predetermined amount of yarn is wound around the winding tube, and from the package surface. The package monitoring apparatus according to claim 1, wherein the defective yarn portion that has jumped out can be detected.   The sensing position by the said light emitting element and the said light receiving element which detects the said defective thread part is comprised so that a position can be changed according to the change of the winding diameter of the said package. The package monitoring apparatus in any one.

Images