JP2011144029A - Yarn winding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn winding device capable of catching a yarn end of yarn wound to a package with high accuracy. <P>SOLUTION: A yarn end catching device 70 of the yarn winding device 100 includes: a suction arm 8 for pulling out the yarn Y from the package P by approaching or separating a suction mouse 8a to/from the package P by moving so as to be turnable by catching the yarn end of the yarn Y wound to the package P by the suction mouse 8a formed at a tip; a negative pressure device 31 for generating negative pressure for sucking the yarn end of the yarn Y wound to the package P by the suction mouse 8a; and a suction force varying mechanism 60 for varying a suction force of the suction mouse 8a. The suction force varying mechanism 60 varies the suction force acting on a surface of the package P by the suction mouse 8a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique of a yarn winding device.

  2. Description of the Related Art Conventionally, a yarn winding device that winds a yarn by rotating a bobbin and forms a package is known. The yarn winding device winds the yarn while continuously determining the presence or absence of a defective portion of the yarn.

  When a defective part is found in the yarn unwound from the yarn supplying bobbin, the yarn winding device adjusts the yarn quality of the yarn to be constant by removing the defective part. For this reason, the yarn winding device cuts the yarn and removes the defective portion, and then joins the yarn end portions of the yarn together to wind up again as a single yarn (see, for example, Patent Document 1). ).

  However, if the yarn is cut during the process of forming the package, one end of the cut yarn is wound around the package and the already wound yarn and the fluff are entangled. In some cases, the end of the wound yarn cannot be captured and pulled out even if suction is performed using a suction mouse.

  For example, Patent Document 2 discloses a technique in which a yarn loop of a yarn is unwound and pulled out from a package by reciprocating a suction nozzle opening (suction mouse). However, since this technique reciprocates the suction nozzle opening (suction mouse) with a relatively long stroke to bring it close to or away from the surface of the package, it reduces the suction force when it is separated. In some cases, the drawing action of the yarn deteriorated.

JP 2009-46268 A JP-A-10-167777

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a yarn winding device that can capture a yarn end portion of a yarn wound around a package with high accuracy.

  Next, means for solving this problem will be described.

That is, the first invention is a yarn winding device for winding a yarn supplied from a yarn supplying bobbin and forming a package.
The yarn winding device includes a yarn end capturing device that captures a yarn end of the yarn wound around the package and draws the yarn from the package.
The yarn end catching device captures the yarn end of the yarn wound around the package with a suction mouth formed at the tip and swivels to bring the suction mouth close to the package. Or a suction arm that pulls out the yarn from the package at a distance,
A negative pressure device for generating a negative pressure for sucking a yarn end of the yarn wound around the package by the suction mouse;
A suction force variation mechanism that varies the suction force of the suction mouse,
The suction force fluctuation mechanism is a suction position where the suction mouse exerts a suction force on the surface of the package and sucks the yarn end portion of the yarn wound around the package, and the suction mouse moves to the surface of the package. The suction force exerted on the surface is changed.

  In a second aspect based on the first aspect, the suction force fluctuation mechanism sucks the yarn end portion of the yarn wound around the package by the suction mouth exerting a suction force on the surface of the package. In the suction position, the suction arm is controlled to vibrate, and thereby the vibration generating device varies the suction force exerted on the surface of the package by the suction mouse.

According to a third invention, in the second invention, the vibration generator includes a stepping motor that rotates the suction arm in synchronization with a pulse signal;
A stopper that restricts the pivoting movement of the suction arm toward the package;
Even after the suction arm abuts against the stopper, the stepping motor is driven so as to pivot the suction arm toward the package side, and the suction arm is vibrated so that the suction mouse is placed on the surface of the package. And a control device that varies the suction force exerted.

  In a fourth aspect based on the first aspect, the suction force fluctuation mechanism sucks the yarn end portion of the yarn wound around the package by the suction mouth exerting a suction force on the surface of the package. In the suction position, the suction mouth is a suction flow rate changing mechanism that varies the suction amount by changing the suction flow rate exerted on the surface of the package by the suction mouse.

A fifth invention is the shutter according to the fourth invention, wherein the suction flow rate changing mechanism changes an opening area of an internal passage of a suction pipe connected from the negative pressure device to the suction arm,
The shutter increases or decreases the opening area of the internal passage of the suction pipe to vary the suction force exerted on the surface of the package by the suction mouth.

  As effects of the present invention, the following effects can be obtained.

  According to the first to fourth aspects of the invention, when the yarn end of the yarn wound around the package is captured, the suction mouse exerts a suction force on the surface of the package and the yarn wound around the package. The suction force exerted on the package can be varied at the suction position for sucking the yarn end of the strip. As a result, even when the yarn fluffs are entangled by being wound around the package, the yarn end portion of the yarn is effectively applied by applying an impact by a suction action with a strong and weak amplitude to the surface of the package. Can be captured with high accuracy.

1 is a side view showing an overall configuration of a yarn winding device 100. FIG. FIG. 4 is a diagram showing the turning movement of the suction arm 8 and the operation of the stopper mechanism 10. It is a flowchart which shows the operation | movement aspect of the yarn winding apparatus 100. It is a figure which shows cutting operation | movement S120 of the yarn winding apparatus 100. It is one figure which shows arrangement | positioning operation | movement S130 of the yarn winding apparatus 100. It is another figure which shows arrangement | positioning operation | movement S130 of the yarn winding apparatus 100. FIG. 7A is a perspective view showing the configuration of the stepping motor 12. FIG. 7B is a cross-sectional view of the stepping motor 12. FIG. 8A is a schematic diagram showing the positional relationship between the small teeth 12ct of the magnetic poles in the A phase and the small teeth 12at and 12bt of the first rotor 12a and the second rotor 12b. FIG. 8B is a schematic diagram showing the positional relationship between the small teeth 12ct of the magnetic pole in the B phase and the small teeth 12at and 12bt of the first rotor 12a and the second rotor 12b. FIG. 8C is a schematic diagram showing the positional relationship between the small teeth 12ct of the magnetic pole in the C phase and the small teeth 12at and 12bt of the first rotor 12a and the second rotor 12b. It is a figure which shows the vibration of the suction mouse 8a. FIG. 2 is a side view showing the overall configuration of the yarn winding device 200. 2 is an exploded view showing a configuration of a shutter 21. FIG.

  First, the yarn winding device 100 according to the first embodiment of the present invention will be described.

  FIG. 1 is a side view showing the overall configuration of the yarn winding device 100. In addition, the arrow in a figure has shown the feed direction of the yarn Y. FIG.

  The yarn winding device 100 includes a yarn unwinding auxiliary device 2, a gate tensor 3, a yarn splicing device 4, a yarn clearer 5, and a traverse drum 6 along the feeding direction of the yarn Y unwound from the yarn supplying bobbin 1. , A bobbin 7 is provided. The main body of the yarn winding device 100 is provided with a suction arm 8, a bobbin yarn pull-out arm 9, a stopper mechanism 10, and the like.

  The yarn unwinding assisting device 2 assists the unwinding of the yarn Y from the yarn supplying bobbin 1. The yarn unwinding assisting device 2 assists unwinding by restricting the yarn Y unwound from the yarn supplying bobbin 1 from spreading due to the centrifugal force and appropriately adjusting the tension applied to the yarn Y. It is said.

  The gate tensor 3 applies a predetermined tension to the yarn Y sent from the yarn supplying bobbin 1 to the bobbin 7 and keeps this tension constant. The gate tensor 3 adjusts the tension applied to the yarn Y by applying the yarn Y to each comb constituting the comb-tooth member, and enables high-speed winding by the bobbin 7.

  The yarn joining device 4 joins the yarn ends of the yarn Y. For example, when the yarn Y is cut to remove the defective portion of the yarn Y, the yarn splicing device 4 joins the yarn end portions of the yarn Y that has been cut and divided. The yarn splicing device 4 provided in the yarn winding device 100 uses an air splicer device that splics the yarn end portions using a swirling flow of air.

  The yarn clearer 5 searches for a defective portion of the yarn Y. The yarn clearer 5 irradiates the yarn Y using a light emitting diode or the like as a light source and detects the amount of reflected light from the yarn Y to determine the presence or absence of a defective portion. Further, a cutter (not shown) that cuts the yarn Y when the yarn clearer 5 finds a defective portion of the yarn Y is provided near the yarn clearer 5.

  The traverse drum 6 rotates the bobbin 7 and the package P formed on the bobbin 7 while traversing the yarn Y. The traverse drum 6 is rotated by a motor (not shown) and stabilizes the tension applied to the yarn Y by keeping the winding speed of the yarn Y constant. Further, the traverse drum 6 prevents the bias of the yarn Y in the package P by traversing the yarn Y.

  The suction arm 8 is a suction duct that is pivotally attached to the main body of the yarn winding device 100. A suction mouth 8a is provided at the tip of the suction arm 8, and the yarn end wound around the package P can be captured and held by sucking air from the suction mouse 8a. . Further, the suction arm 8 can pivot downward while holding the yarn Y, and the yarn Y is disposed at a predetermined position of the yarn splicing device 4. The suction arm 8 is connected to the negative pressure duct 30 by a suction pipe 20. Therefore, the negative pressure device 31 can supply a negative pressure to the suction arm 8a via the negative pressure duct 30, the suction pipe 20, and the suction arm 8, and can generate a suction force to the suction mouth 8a.

  The bobbin yarn pull-out arm 9 is a suction duct that is pivotally attached to the main body of the yarn winding device 100. A suction mouth 9a is provided at the tip of the bobbin thread pull-out arm 9. By sucking air from the suction mouth 9a, the thread end on the yarn feeding bobbin 1 side can be captured and held. Yes. Further, the bobbin yarn pull-out arm 9 can turn upward while holding the yarn Y, and the yarn Y is arranged at a predetermined position of the yarn splicing device 4.

  The stopper mechanism 10 is configured to place the suction mouth 8a at an optimum suction position for capturing the yarn end by restricting the pivoting movement of the suction arm 8 toward the package P. The stopper mechanism 10 is configured such that the suction mouth 8a can always be arranged at the optimum suction position with respect to the package P whose diameter is increased by winding the yarn Y.

  Here, the configuration that enables the pivoting movement of the suction arm 8 will be described, and the operation of the stopper mechanism 10 will be described.

  FIG. 2 is a diagram illustrating the turning movement of the suction arm 8 and the operation of the stopper mechanism 10. In addition, the arrow in a figure has shown the turning direction of the suction arm 8, and the operation direction of each member which comprises the stopper mechanism 10. FIG.

  A stepping motor 12 is incorporated in the main body of the yarn winding device 100 as a drive device that enables the suction arm 8 to turn. An output gear 13 is fixed to the output shaft 12 d of the stepping motor 12, and the output gear 13 and the input gear 14 fixed to the suction arm 8 are connected via a power transmission belt 15. As a result, the stepping motor 12 is driven in synchronization with the pulse signal by receiving the pulse signal transmitted from the control device 40, and can turn the suction arm 8 upward or downward.

  The stopper mechanism 10 will be described. First, the cradle 10a that rotates according to the diameter of the package P rotates the cam 10c via the rod 10b. And the stopper 10d arrange | positioned so that the cam 10c may be touched will be pushed by this cam 10c. In other words, the stopper mechanism 10 moves the stopper 10d to a position corresponding to the diameter of the package P, thereby bringing the stopper 10d and the suction arm 8 into contact with each other, thereby restricting the pivoting movement of the suction arm 8. It is.

  The above is the overall configuration of the yarn winding device 100 according to the first embodiment of the present invention. Next, when a defective portion is found in the yarn Y, the defective portion is removed and the yarn end portions are joined together. An operation mode of the yarn winding device 100 will be described.

  FIG. 3 is a flowchart showing an operation mode of the yarn winding device 100. 4 is a diagram showing a cutting operation S120 of the yarn winding device 100, and FIGS. 5 and 6 are diagrams showing an arrangement operation S130 of the yarn winding device 100. FIG. In addition, the arrow in a figure has shown the turning direction of the suction arm 8 and the bobbin thread | yarn pull-out arm 9. FIG.

  As shown in FIG. 3, the operation mode of the yarn winding device 100 mainly includes a search operation S110, a cutting operation S120, an arrangement operation S130, and a yarn splicing operation S140.

  The search operation S110 is an operation for searching for a defective portion of the yarn Y. As described above, the yarn clearer 5 provided in the yarn winding device 100 determines the presence or absence of a defective portion of the yarn Y by detecting the amount of reflected light from the yarn Y.

  The cutting operation S120 is an operation of cutting the yarn Y when the yarn clearer 5 finds a defective portion of the yarn Y. As described above, the cutter attached in the vicinity of the yarn clearer 5 cuts the yarn Y when the yarn clearer 5 finds a defective portion of the yarn Y.

  As a result, as shown in FIG. 4, the upper yarn YU that is downstream from the cut portion of the yarn Y is wound around the package P. Further, the lower yarn YR upstream from the cut portion of the yarn Y is held by the suction mouth 9 a of the bobbin yarn pull-out arm 9. The defective portion of the yarn Y is wound around the package P as a part of the upper yarn YU.

  The arrangement operation S <b> 130 is an operation for arranging the yarn Y that has been cut and divided at a predetermined position of the yarn splicing device 4. As shown in FIG. 5, first, the suction arm 8 pivots upward to capture and hold the yarn end portion of the yarn Y (upper yarn YU). Then, as shown in FIG. 6, the suction arm 8 pivots downward while holding the yarn Y (upper yarn YU) and moves the yarn Y (upper yarn YU) to a predetermined position of the yarn splicing device 4. ). Further, the bobbin yarn pull-out arm 9 pivots upward while holding the yarn Y (lower yarn YR), and arranges the yarn Y (lower yarn YR) at a predetermined position of the yarn splicing device 4.

  The arrangement operation S130 will be specifically described with reference to FIGS. 5 and 6. First, the suction arm 8 is pivoted upward until it comes into contact with the stopper 10d. At this time, the suction arm 8 is controlled so that the turning speed is reduced just before contacting the stopper 10d. That is, the suction arm 8 turns at a high speed immediately after starting to turn upward, and turns at a low speed just before contacting the stopper 10d. In the present embodiment, two steps of high speed and low speed are used. However, a control configuration in which the turning speed is gradually decreased can be employed.

  Thus, when the suction arm 8 contacts the stopper 10d and the turning movement is restricted, the suction mouse 8a has moved to a predetermined suction position. And the suction mouth 8a can capture | acquire the thread | yarn end part of the thread | yarn Y (upper thread | yarn YU) wound up by this package P by giving a suction force to the package P, and hold | maintains this.

  Thereafter, the suction arm 8 pivots downward while holding the yarn end of the yarn Y (upper yarn YU), and arranges the yarn Y (upper yarn YU) at a predetermined position of the yarn splicing device 4. To do. Since the yarn Y (upper thread YU) is sucked by the suction mouse 8a, it is stretched from the suction mouse 8a to the package P.

  On the other hand, the bobbin yarn pull-out arm 9 pivots upward while holding the yarn Y (lower yarn YR) on the yarn supplying bobbin 1 side, and moves the yarn Y (lower yarn) to a predetermined position of the yarn splicing device 4. YR). Since the yarn Y (lower thread YR) is sucked by the suction mouse 9a, it is stretched from the suction mouse 9a to the yarn feeding bobbin 1.

  The yarn splicing operation S140 is an operation of splicing the yarn end portions of the yarn Y (upper yarn YU) and the yarn Y (lower yarn YR). As described above, the yarn splicing device 4 splices the yarn ends of the yarn Y using the swirl flow of air.

  The yarn joining operation S140 will be specifically described. First, the yarn joining device 4 draws the yarn Y (upper yarn YU) and the yarn Y (lower yarn YR) and guides them to the yarn joining hole. Then, the yarn splicing device 4 fixes the yarn Y (upper yarn YU) and the yarn Y (lower yarn YR) by a clamping operation and then cuts the yarn using the cutter. As a result, the defective portion wound around the package P as a part of the upper thread YU is sucked and removed by the suction mouth 8a.

  Thereafter, the yarn splicing device 4 performs a twisting operation of twisting the untwisted yarn ends after performing the untwisting operation to untwist the yarn ends by the swirling flow of air. The twisting operation is a process in which yarn ends that have been untwisted are twisted using a swirling flow of air formed in the opposite direction to that during the untwisting operation.

  In this way, the yarn winding device 100 can remove the defective portion of the yarn Y, and by joining together the yarn end portions of the yarn Y (upper yarn YU) and the yarn Y (lower yarn YR), It is possible to wind it as a single yarn Y again.

  The operation mode of the yarn winding device 100 has been described above. Next, when the suction mouth 8a captures the yarn end of the yarn Y (upper yarn YU) wound around the package P in the arrangement operation S130. A configuration for varying the suction force exerted on the package P will be described.

  First, the stepping motor 12 that rotates the suction arm 8 will be described in detail. As described above, the stepping motor 12 is an electric motor that is driven in synchronization with the pulse signal by receiving the pulse signal transmitted from the control device 40. In addition, although the control apparatus 40 in this embodiment is a constant voltage drive system that creates a pulse signal by cutting off a DC voltage, it may be a constant current drive system that creates a pulse signal by cutting off a DC current. .

  7A is a perspective view showing the configuration of the stepping motor 12, and FIG. 7B is a cross-sectional view thereof. In addition, the arrow in a figure has shown the rotation direction of the output shaft 12d.

  As shown in FIGS. 7A and 7B, the stepping motor 12 mainly includes a first rotor 12a, a second rotor 12b, a stator 12c, and an output shaft 12d.

  The first rotor 12a and the second rotor 12b are rotors formed in a substantially cylindrical shape, and are magnetized so that the first rotor 12a has an N pole and the second rotor 12b has an S pole. A plurality of small teeth 12 at and 12 bt are provided on the outer peripheral surfaces of the first rotor 12 a and the second rotor 12 b, and these small teeth 12 at and 12 bt are arranged so as to be shifted from each other by a half pitch ( (See FIGS. 8A, 8B, and 8C.) Further, an output shaft 12d is fitted into the first rotor 12a and the second rotor 12b, and the output shaft 12d is rotated integrally with the rotors 12a and 12b.

  The stator 12c is a stator having a plurality of magnetic poles provided on the inner peripheral surface thereof, and each magnetic pole constitutes a so-called electromagnet that is excited when a current flows through its winding. The stator 12c forms a magnetic phase by a pair of opposing magnetic poles, and has a plurality of magnetic phases of A phase, B phase, C phase,... As shown in the drawing. Each magnetic pole is provided with a plurality of small teeth 12ct so as to face the first rotor 12a and the second rotor 12b.

  Assuming that a current flows through the A-phase winding in such a configuration, the magnetic poles forming the A-phase are excited and have the polarity of the S-pole. As a result, the small teeth 12ct of the magnetic poles constituting the A phase and the small teeth 12at of the first rotor 12a having the polarity of the N pole attract each other, and at the same time, the polarities of the small teeth 12ct of the magnetic poles constituting the A phase and the polarity of the S pole Since the small teeth 12bt of the second rotor 12b have repulsion with each other, the output shaft 12d rotates and shifts to a stable point.

  Next, when energization is switched from the A phase to the B phase and a current flows through the B phase winding, the magnetic poles constituting the B phase are excited and have the polarity of the N pole. Thereby, the small teeth 12ct of the magnetic poles constituting the B phase and the small teeth 12bt of the second rotor 12b having the polarity of the S pole attract each other, and at the same time, the polarities of the small teeth 12ct of the magnetic pole constituting the B phase and the polarity of the N pole Since the small teeth 12at of the first rotor 12a have repulsion with each other, the output shaft 12d rotates and shifts to the next stable point.

  In this way, the stepping motor 12 can rotate the output shaft 12d by a predetermined angle by sequentially switching energization in the A phase, B phase, C phase,... Further, the output shaft 12d can be reversely rotated every predetermined angle by sequentially switching energization in the reverse direction. Thereby, the stepping motor 12 enables the suction arm 8 to pivot upward or downward.

  The stepping motor 12 releases the synchronization by receiving the pulse signal transmitted from the control device 40 even after the suction arm 8 comes into contact with the stopper 10d, and vibrates the suction position of the suction mouse 8a with respect to the package P. Is possible.

  Here, a mode in which the suction position of the suction mouse 8a with respect to the package P is vibrated by releasing the synchronization with the pulse signal transmitted from the control device 40 will be described in detail.

  FIG. 8A is a schematic view showing the positional relationship between the small teeth 12ct of the magnetic pole in the A phase and the small teeth 12at and 12bt of the first rotor 12a and the second rotor 12b, and FIG. It is the schematic which shows the positional relationship of tooth 12ct and each small tooth 12at * 12bt of the 1st rotor 12a and the 2nd rotor 12b. FIG. 8C is a schematic diagram showing the positional relationship between the small teeth 12ct of the magnetic pole in the C phase and the small teeth 12at and 12bt of the first rotor 12a and the second rotor 12b. In addition, the arrow in a figure has shown the direction where each small tooth 12at * 12ct (12bt * 12ct) mutually attracts by magnetic force, and the rotation direction of each rotor 12a * 12b, ie, the rotation direction of the output shaft 12d.

  As described above, the suction movement of the suction arm 8 is restricted by contacting the stopper 10d when the suction arm 8 is turned upward. FIG. 8A1 shows the positional relationship between the small teeth 12ct of the magnetic pole in the A phase immediately before the suction arm 8 contacts the stopper 10d and the small teeth 12at and 12bt of the rotors 12a and 12b.

  As shown in FIG. 8A1, when the small teeth 12ct of the magnetic pole having the polarity of the S pole and the small teeth 12at of the first rotor 12a having the polarity of the N pole are attracted to each other, the output shaft 12d rotates in the right direction in the figure. And try to move to a stable point.

  However, when the suction arm 8 comes into contact with the stopper 10d, the rotation of the output shaft 12d is forcibly stopped, and the positional relationship between the small teeth 12ct of the magnetic poles and the small teeth 12at and 12bt of the rotors 12a and 12b is shown in FIG. 8A2. It will stop in the state shown. At this time, the suction mouse 8a is in a state where movement to the package P side is restricted at a position close to the package P (see the solid line in FIG. 9). This position is a suction position where the suction mouth 8a applies a suction force to the surface of the package P to suck the yarn end portion of the yarn Y wound around the package P. The output shaft 12d is stably stopped when the small teeth 12ct of the magnetic pole and the small teeth 12at of the first rotor 12a attract each other.

  Thereafter, as shown in FIG. 8B1, the stepping motor 12 switches the energization by receiving the pulse signal even after the rotation of the output shaft 12d stops, and the magnetic poles constituting the B phase are excited and the N poles are excited. It will have polarity.

  Then, the small teeth 12ct of the magnetic pole having the polarity of the N pole and the small teeth 12bt of the second rotor 12b having the polarity of the S pole are attracted to each other, and the output shaft 12d is stabilized by rotating in the left direction in the figure. Move to the point. That is, the stepping motor 12 does not rotate the output shaft 12d in synchronization with switching of energization from the A phase to the B phase, but releases the synchronization and reversely rotates (referred to as a step-out phenomenon). At this time, the suction mouse 8a is in a state of being separated from the package P because the suction arm 8 slightly moves in the direction of turning downward, although slightly (see the two-dot chain line in FIG. 9). The output shaft 12d is stably stopped at the position shown in FIG. 8B2 when the small teeth 12ct of the magnetic pole and the small teeth 12bt of the second rotor 12b attract each other.

  After that, the stepping motor 12 switches energization by receiving the pulse signal, and the magnetic pole constituting the C phase is excited to have the polarity of the S pole.

  Then, as shown in FIG. 8C1, the small teeth 12ct of the magnetic pole having the polarity of the S pole and the small teeth 12at of the first rotor 12a having the polarity of the N pole come to attract each other, and the output shaft 12d It tries to shift to a stable point by rotating in the direction.

  However, when the suction arm 8 comes into contact with the stopper 10d again, the rotation of the output shaft 12d is forcibly stopped, and the positional relationship between the small teeth 12ct of the magnetic poles and the small teeth 12at and 12bt of the rotors 12a and 12b is shown in FIG. It will stop in the state shown in 8C2. At this time, the suction mouse 8a is in a state of being close to the package P because the suction arm 8 finely moves in the direction in which the suction arm 8 pivots upward (see the solid line in FIG. 9). The output shaft 12d is stably stopped when the small teeth 12ct of the magnetic pole and the small teeth 12at of the first rotor 12a attract each other.

  Thus, the stepping motor 12 can cancel the synchronization by receiving the pulse signal transmitted from the control device 40 even after the suction arm 8 contacts the stopper 10d. The stepping motor 12 repeats forward rotation and reverse rotation for each pulse signal, so that the suction arm 8 can be repeatedly finely moved and the suction mouse 8a can be repeatedly finely moved, that is, vibrated at the suction position. is there.

  As described above, in the present embodiment, the stepping motor 12, the stopper 10d, and the control device 40 constitute the vibration generating device 50 that vibrates the suction mouse 8a (see FIG. 2). The vibration generating device 50 functions as a suction force fluctuation mechanism 60 that fluctuates the suction force of the suction mouse 8a (see FIG. 2). The suction arm 8, the negative pressure device 31, and the suction force fluctuation mechanism 60 constitute a yarn end capturing device 70 (see FIG. 1).

  With such a configuration, when the yarn end portion of the yarn Y (upper yarn YU) wound around the package P is captured, the suction force exerted on the package P can be varied. As a result, even when the fluff of the yarn Y is entangled by being wound around the package P, the suction mouth exerts a suction force on the surface of the package and the yarn end portion of the yarn wound around the package. The yarn end portion of the yarn Y can be effectively lifted by applying an impact by a suction action having a strong and weak amplitude to the surface of the package P at the suction position for sucking the yarn, and can be captured with high accuracy. It becomes possible.

  The stepping motor 12 in the present embodiment is a so-called HV type stepping motor, but may be, for example, a VR type stepping motor or a PM type stepping motor, and the above-described configuration can be realized in any case. .

  Next, the yarn winding device 200 according to the second embodiment of the present invention will be described. The yarn winding device 200 according to the present embodiment differs from the yarn winding device 100 according to the first embodiment in that the shutter 21 is used as a configuration that varies the suction force exerted on the package P. However, the same components as those in the above-described yarn winding device 100 are denoted by the same reference numerals, and different portions will be mainly described.

  FIG. 10 is a side view showing the overall configuration of the yarn winding device 200. In addition, the arrow in a figure has shown the feed direction of the yarn Y. FIG.

  The yarn winding device 200 includes a yarn unwinding assisting device 2, a gate tensor 3, a yarn splicing device 4, a yarn clearer 5, and a traverse drum 6 along the feeding direction of the yarn Y unwound from the yarn supplying bobbin 1. , A bobbin 7 is provided. The main body of the yarn winding device 200 is provided with a suction arm 8, a bobbin yarn pull-out arm 9, a stopper mechanism 10, and the like.

  In the yarn winding device 200 according to this embodiment, the suction pipe 20 connected to the suction mouth 8a of the suction arm 8 is provided with a shutter 21.

  The shutter 21 adjusts the opening area of the internal passage of the suction pipe 20. The shutter 21 adjusts the opening area of the internal passage of the suction pipe 20 so that when the suction mouth 8a captures the yarn end portion of the yarn Y (upper yarn YU) wound around the package P, the package is used. The suction force exerted on P is varied.

  FIG. 11 is an exploded view showing the configuration of the shutter 21. In addition, the arrow in a figure has shown the rotation direction of the control board 21b, and the flow of the air suck | inhaled from the suction mouth 8a.

  The shutter 21 is configured such that passage holes 21a and 21a communicating with the suction pipe 20 can be opened and closed using a control plate 21b, and the control plate 21b is rotated by a motor (not shown) such as a stepping motor.

  As a result, when the control plate 21b is rotated in the opening direction to increase the opening area of the internal passage of the suction pipe 20, the suction force of the suction mouth 8a increases, and the control plate 21b is rotated in the closing direction. If the opening area of the internal passage of the suction pipe 20 is reduced, the suction force of the suction mouth 8a is reduced.

  As described above, in this embodiment, the shutter 21 constitutes the vibration generating device 50 that varies the suction force of the suction mouse 8a (see FIG. 10). Further, this vibration generating device functions as a suction flow rate changing mechanism 80 for changing the suction force of the suction mouse 8a (see FIG. 10).

  With such a configuration, when the yarn end portion of the yarn Y (upper yarn YU) wound around the package P is captured, the suction force exerted on the package P can be varied. Thus, even when the fluff is entangled by being wound around the package P, the suction mouth applies a suction force to the surface of the package and sucks the yarn end portion of the yarn wound around the package. The yarn end of the yarn Y can be effectively lifted by applying an impact by suction action with strong and weak amplitude to the surface of the package P at the position, and the yarn end of the yarn Y can be moved with high accuracy. It is possible to capture.

DESCRIPTION OF SYMBOLS 1 Yarn feeding bobbin 2 Thread unwinding auxiliary device 3 Gate tensor 4 Yarn splicing device 5 Yarn clearer 6 Traverse drum 7 Bobbin 8 Suction arm 8a Suction mouse 9 Bobbin thread pull-out arm 9a Suction mouse 10 Stopper mechanism 10d Stopper 12 Stepping motor 12a First One rotor 12at Small teeth 12b Second rotor 12bt Small teeth 12c Stator 12ct Small teeth 12d Output shaft 20 Suction pipe 21 Shutter 21a Passage hole 21b Control plate 50 Vibration generator 60 Suction force fluctuation mechanism 70 Yarn end portion capture device 80 Suction flow rate change Mechanism 100 Yarn winding device 200 Yarn winding device P Package Y Yarn YU Upper yarn YR Lower yarn

Claims (5)

In a yarn winding device for winding a yarn supplied from a yarn feeding bobbin and forming a package,
The yarn winding device includes a yarn end capturing device that captures a yarn end of the yarn wound around the package and draws the yarn from the package.
The yarn end catching device captures the yarn end of the yarn wound around the package with a suction mouth formed at the tip and swivels to bring the suction mouth close to the package. Or a suction arm that pulls out the yarn from the package at a distance,
A negative pressure device for generating a negative pressure for sucking a yarn end of the yarn wound around the package by the suction mouse;
A suction force variation mechanism that varies the suction force of the suction mouse,
The suction force fluctuation mechanism is a suction position where the suction mouse exerts a suction force on the surface of the package and sucks the yarn end portion of the yarn wound around the package, and the suction mouse moves to the surface of the package. A yarn winding device characterized by varying the suction force exerted on the yarn.   The suction force fluctuation mechanism regulates the suction arm and vibrates at a suction position where the suction mouth applies a suction force to the surface of the package and sucks a yarn end of the yarn wound around the package. The yarn winding device according to claim 1, wherein the yarn winding device is a vibration generating device that varies the suction force exerted on the surface of the package by the suction mouse. The vibration generator includes a stepping motor that rotates the suction arm in synchronization with a pulse signal;
A stopper that restricts the pivoting movement of the suction arm toward the package;
Even after the suction arm abuts against the stopper, the stepping motor is driven so as to pivot the suction arm toward the package side, and the suction arm is vibrated so that the suction mouse is placed on the surface of the package. The yarn winding device according to claim 2, comprising a control device that varies the suction force exerted.   The suction force fluctuation mechanism is a suction position where the suction mouse exerts a suction force on the surface of the package to suck the yarn end portion of the yarn wound around the package, and the suction mouse moves to the surface of the package. 2. The yarn winding device according to claim 1, wherein the yarn winding device is a suction flow rate changing mechanism that varies a suction amount by changing a suction flow rate exerted on the yarn. The suction flow rate changing mechanism is a shutter that changes an opening area of an internal passage of a suction pipe connected from the negative pressure device to the suction arm,
5. The yarn winding device according to claim 4, wherein the shutter increases or decreases an opening area of an internal passage of the suction pipe to change a suction force exerted on the surface of the package by the suction mouth. .

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