JP2013035664A - Yarn winding device and yarn winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winding device that minimizes occurrences of sloughing during unwinding from a yarn feeding bobbin even when yarn winding is performed at a high speed, thereby increasing package production efficiency.SOLUTION: A yarn unwinding assisting device 20 of a yarn winding unit 1 includes a movable cylinder 31 that, during yarn unwinding from the yarn feeding bobbin 8, is to be put on to cap an end part on a side from which a yarn is unwound of the yarn feeding bobbin 8 to thereby regulate a bulge of a curved path of the yarn. An inner diameter of the movable cylinder 31 is≥28 mm and ≤30 mm.

Description

  The present invention relates to a yarn winding device that winds a yarn unwound from a yarn feeding bobbin, and a yarn unwinding method.

  Conventionally, automatic unwinding of bobbin yarns produced by a spinning machine, etc., removing yarn defects such as slabs, and splicing multiple yarns of bobbin yarns to form one package A winder is known. Among them, Patent Document 1 includes a yarn unwinding assisting device that regulates the bulge (also referred to as a balloon) of the unwound yarn in order to stabilize the yarn tension at the time of unwinding and prevent yarn breakage. Have been disclosed.

  The yarn unwinding assisting device of Patent Document 1 covers the upper end portion (the end portion on the yarn unwinding side) of the yarn feeding bobbin that is supported upright when the yarn is unwound, and unwinds the yarn from the yarn feeding bobbin. A movable cylinder body that follows and descends. By this movable cylinder, the yarn unwound from the yarn supplying bobbin is regulated so as not to swell beyond a certain level, and the balloon shape is stabilized, so that the yarn unwinding tension is stabilized and yarn breakage is prevented.

JP-A-10-29765

  Incidentally, in recent years, for the purpose of improving the package production efficiency, it is desired to wind the yarn from the yarn feeding bobbin at a higher winding speed. However, when the winding speed (yarn unwinding speed) is increased, the balloon at the time of yarn unwinding does not sufficiently expand. In particular, when the yarn amount of the yarn feeding bobbin becomes 1/3 or less, the balloon becomes small. As a result, so-called sluffing (ring omission) occurs in which yarns intertwined with fluff come out of the yarn feeding bobbin at a time, and yarn breakage is likely to occur. As described above, even if the winding speed is simply increased, the breakage of yarn due to the above-mentioned sluffing frequently occurs, and the production efficiency of the package is lowered.

  An object of the present invention is to provide a yarn winding device capable of suppressing the occurrence of sluffing when unwinding a yarn feeding bobbin as much as possible and improving the package production efficiency even when winding the yarn at high speed. is there.

Means for Solving the Problems and Effects of the Invention

A yarn winding device according to a first aspect of the present invention is a bobbin support portion that supports a yarn supply bobbin in which a yarn is wound around a core tube, and a yarn that has been unwound from the yarn supply bobbin that is supported by the bobbin support portion. A yarn winding portion that forms a package, and a yarn unwinding assist device that assists in unwinding the yarn from the yarn feeding bobbin,
The yarn unwinding assisting device is placed on the yarn unwinding side end of the yarn supplying bobbin when the yarn is unwound, and regulates the swelling of the yarn when unwound from the yarn supplying bobbin. And the cylindrical body has an inner diameter of 28 mm or more and 30 mm or less.

  According to the present invention, when the inner diameter of the cylinder covering the end of the yarn feeding bobbin on the yarn unwinding side is set within a range of 28 mm or more and 30 mm or less, the yarn is wound at a high winding speed. Even if it exists, a balloon will fully inflate and generation | occurrence | production of sluffing is suppressed.

  In the yarn winding device according to a second aspect of the present invention, in the first aspect, the yarn unwinding assisting device has a detecting means for detecting a yarn layer of the yarn feeding bobbin, and the cylindrical body is a member of the detecting means. According to the detection result, it moves in the cylinder axis direction and in the direction approaching the yarn layer.

  According to the present invention, the cylinder body can be moved in the cylinder axis direction following the progress of the yarn unwinding of the yarn supplying bobbin, so that the balloon shape can always be kept constant, and the yarn unwinding can be performed. Stabilize.

  In the yarn winding device according to a third aspect of the present invention, in the second aspect of the invention, the yarn unwinding assist device has a fixed throttle member having a throttle portion, and the cylindrical body surrounds the fixed throttle member. It is arrange | positioned and it is comprised so that it can move to the said cylinder-axis direction with respect to the said fixed aperture member.

  In the present invention, the cylinder that regulates the balloon moves in the cylinder axis direction with respect to the fixed throttle member having the throttle portion. For this reason, the yarn path is always regulated at the same position by the throttle portion of the fixed throttle member, and the balloon formed with the throttle portion as a base point is regulated by the movable cylinder, so that the balloon shape is further stabilized.

  According to a fourth aspect of the present invention, there is provided the yarn winding device according to the second or third aspect, wherein the yarn unwinding assist device includes a driving means for moving the cylindrical body in the cylinder axis direction, and driving of the driving means. It has a transmission mechanism which transmits force to the cylinder.

  In the present invention, since the dedicated drive means for moving the cylinder is provided, the movement of the cylinder can be controlled independently regardless of the operation of the other operating portions of the yarn winding device.

  The yarn winding device according to a fifth aspect of the present invention is characterized in that, in the fourth aspect, the drive means is a stepping motor.

  According to this, the movement of the cylinder can be easily controlled by adjusting the number of drive pulses of the stepping motor. Further, even when the cylinder becomes unable to move due to a trouble such as being caught by another member, the motor is stepped out and damage is prevented.

  According to a sixth aspect of the present invention, in the fourth aspect of the invention, the drive means is an air cylinder.

  Since the cylinder can be linearly moved by the forward / backward drive of the rod of the air cylinder, the configuration of the transmission mechanism is simplified.

  The yarn winding device according to a seventh aspect of the present invention is characterized in that, in any of the fourth to sixth aspects, the transmission mechanism is a screw mechanism.

  By using a screw mechanism for the transmission mechanism, it is possible to accurately control the movement of the cylinder. Also, there is an advantage that the current state is maintained when the power of the drive unit is lost.

  An eighth aspect of the present invention is the yarn winding device according to any one of the fourth to sixth aspects, wherein the transmission mechanism includes a transmission belt connected to the cylindrical body.

  By adopting a configuration in which the driving force is transmitted by a transmission belt that does not use an oil agent such as a lubricant, it is possible to reduce the occurrence of problems due to the fluff drifting around the yarn winding device adhering to the transmission mechanism.

  According to a ninth aspect of the present invention, there is provided the yarn winding device according to any one of the first to eighth aspects, wherein the cylindrical body includes a straight cylindrical portion having a constant inner diameter, and an end portion of the straight cylindrical portion on the yarn feeding bobbin side. And a taper cylinder part having a taper shape whose diameter increases toward the outer end, and the inner diameter of the straight cylinder part is 28 mm or more and 30 mm or less.

  By forming the tapered tube portion at the end of the straight tube portion on the yarn feeding bobbin side, the unwinded yarn is smoothly guided into the straight tube portion, and thus further stabilizing the unwinding tension of the yarn, and The effect of suppressing fluff is obtained. In the cylindrical body having such a configuration, since the restriction of the balloon is made at the end of the straight cylindrical portion (connection portion with the tapered cylindrical portion), the inner diameter of the straight cylindrical portion is set to 28 mm or more and 30 mm or less. Is good.

  A yarn winding device according to a tenth aspect of the present invention is the yarn winding device according to any one of the first to ninth aspects, wherein the axis of the core tube of the yarn feeding bobbin coincides with the axis of the cylindrical body. It is characterized by comprising posture adjusting means for adjusting the posture of the yarn feeding bobbin during dredging.

  If the inner diameter of the cylinder is small, the balloon can be widened when winding the yarn at a high winding speed, and the occurrence of sluffing during yarn unwinding is suppressed. The yarn feeding bobbin is easy to contact. In this regard, in the present invention, the posture adjusting means can match the axis of the yarn feeding bobbin and the axis of the cylinder, so even if the clearance between the cylinder and the core tube of the yarn feeding bobbin is small, Contact between the cylinder and the yarn feeding bobbin is less likely to occur.

  According to an eleventh aspect of the present invention, in the yarn winding device according to any one of the first to ninth aspects, the bobbin support portion is inserted into the core tube of the yarn supplying bobbin and cooperates with the core tube. It has a plurality of three or more protruding pieces to be held.

  When the yarn feeding bobbin is held by only two projecting pieces, the posture stability is slightly low, and the axis of the core tube and the axis of the cylinder are likely to be displaced. According to the present invention, since the core tube is held by the three or more projecting pieces, it is possible to maintain a state in which the axis of the core tube is aligned with the axis of the cylindrical body.

  In a yarn winding device according to a twelfth aspect of the present invention, in any one of the first to ninth aspects, the bobbin support portion includes a core member inserted into the core tube of the yarn feeding bobbin, and a periphery of the core member And an elastic member that comes into close contact with the inner surface of the core tube when the core member is inserted into the core tube.

  According to the present invention, the posture of the yarn supplying bobbin is stable because the elastic member disposed around the core member is in close contact with the inner surface of the core tube in a state where the core member is inserted into the core tube of the yarn supplying bobbin. To do. Accordingly, it is possible to maintain a state where the axis of the core tube is aligned with the axis of the cylinder.

  A yarn unwinding method according to a thirteenth aspect of the present invention is a method of unwinding a yarn from a yarn supplying bobbin in which a yarn is wound around a core tube. In a state where the shaft center of the yarn bobbin coincides, the end of the core tube having an outer diameter of 17 mm or more and 22 mm or less is covered with the yarn unwinding side, and the swelling of the yarn unwound from the yarn feeding bobbin is It is characterized by being restricted by the body.

  According to the present invention, since the core tube of the yarn supplying bobbin and the axial center of the cylinder body are aligned, the cylindrical body is put on the end portion of the yarn supplying bobbin. Even if the clearance is small, contact between the cylinder and the yarn feeding bobbin is unlikely to occur. Accordingly, the inner diameter of the cylindrical body can be set to a diameter of 28 mm or more and 30 mm or less, which is slightly larger than the outer diameter of the core tube of the yarn feeding bobbin, so that even when winding the yarn at a high winding speed. Even so, the balloon of the yarn to be unwound is sufficiently inflated, and the occurrence of sluffing is suppressed.

  In a thirteenth aspect of the yarn unwinding method according to the thirteenth aspect, when the outer diameter of the core tube of the yarn feeding bobbin is not less than 17 mm and not more than 20 mm, a cylindrical body having an inner diameter of 28 mm is used. When the outer diameter of the core tube is larger than 20 mm and not larger than 22 mm, a cylindrical body having an inner diameter of 30 mm is used.

  When the thickness of the core tube of the yarn feeding bobbin to be used is different, by using a cylinder with an appropriate inner diameter for each core tube, the yarn feeding bobbin can be used at any speed. The occurrence of sluffing can be suppressed while winding.

It is a side view of one winding unit of an automatic winder. It is a side view of a yarn unwinding auxiliary device. It is a front view of a yarn unwinding auxiliary device. It is a perspective view of a fixed aperture member and a movable cylinder. It is a figure explaining posture adjustment of a yarn feeding bobbin. It is the external view of the yarn feeding bobbin used in the Example. It is a graph which shows the generation | occurrence | production number of the sluffing about the bobbin A of an Example. It is a graph which shows the generation | occurrence | production number of the sluffing about the bobbin B of an Example. It is a front view of the yarn unwinding auxiliary device of the modified form. It is an enlarged view of the bobbin support part of another modification.

  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 (yarn winding devices) for winding a yarn unwound from a yarn supplying bobbin around a winding tube to form a winding package. It is. The automatic winder has a configuration in which a large number of winding units forming one package are arranged in one direction. FIG. 1 is a side view of one winding unit of an automatic winder. In FIG. 1, the right side is defined as the front side (front side) where the operator works on the winding unit 1, and the left side is defined as the rear side (back side) on the opposite side.

  As shown in FIG. 1, each winding unit 1 includes a bobbin supply device 2, a bobbin support unit 3, a yarn winding unit 4, and a unit control unit 5 that controls each part of the winding unit 1. Yes. The winding unit 1 holds the yarn supplying bobbin 8 supplied from the bobbin supplying device 2 by the bobbin support portion 3 and traverses the spun yarn Y unwound from the yarn supplying bobbin 8 while winding the winding tube 1. 6 to form a package P having a predetermined shape.

  The bobbin supply device 2 stores a plurality of cylindrical yarn supply bobbins 8 formed by winding yarn around the core tube 9 and supplies one of the stored yarn supply bobbins 8 to the bobbin support portion 3. . Specifically, the bobbin supply device 2 includes a columnar magazine 10 that houses a plurality of yarn feeding bobbins 8, and a plurality of yarn feeding bobbins 8 that are arranged below the magazine 10 and housed in the magazine 10. A guide chute 11 is provided for dropping one while guiding one toward the bobbin support 3. A support frame 12 is detachably provided on the machine base 7 of the winding unit 1 by, for example, screwing, and the magazine 10 and the guide chute 11 are vertically oriented so as to face the peg 16 of the bobbin support portion 3. Each is attached to the support frame 12 in a posture slightly inclined forward with respect to the direction.

  The magazine 10 is configured to be rotatable about a rotation shaft 13 attached to the support frame 12. The magazine 10 is formed with a plurality of bobbin accommodation holes (not shown) that are arranged in the circumferential direction and each accommodate a yarn feeding bobbin 8. A bobbin receiving plate 14 that receives a plurality of yarn feeding bobbins 8 respectively accommodated in a plurality of bobbin accommodating holes is provided below the magazine 10. The bobbin receiving plate 14 is formed with a notch (not shown). When the magazine 10 rotates and a yarn supplying bobbin 8 is positioned above the notch, the yarn supplying bobbin 8 is notched. It is comprised so that it may fall to the guide chute 11 via a part.

  The guide chute 11 has a pair of left and right opening / closing members 15, and guides the yarn feeding bobbin 8 that has dropped from the magazine 10 to the bobbin support 3 when the opening / closing member 15 is in an open state. When the opening / closing member is in the closed state, the yarn feeding bobbin 8 is prevented from dropping from the magazine 10 to the bobbin support 3.

  The bobbin support 3 is inserted into the lower end of the core tube 9 of the yarn feeding bobbin 8 to hold the bobbin 8 and the yarn feeding bobbin 8 held by the peg 16 to the outside of the bobbin support 3. Has a jumping plate 17 that is discharged.

  The peg 16 has a projecting first holding piece 16a and a projecting second holding piece 16b having a shorter length than the first holding piece 16a. The holding piece 16b can swing in the front-rear direction. Further, the second holding piece 16b can also be rotated relative to the first holding piece 16a, whereby the first holding piece 16a and the second holding piece 16b can be opened and closed.

  When the yarn feeding bobbin 8 is supplied from the bobbin supplying device 2, the first holding piece 16a and the second holding piece 16b are tilted forward while being closed, and are guided by the guide chute 11 from the magazine 10 and fall obliquely. Two holding pieces 16 a and 16 b are inserted into the lower end portion of the core tube 9 of the yarn feeding bobbin 8. Next, the second holding piece 16b is rotated with respect to the first holding piece 16a and the both holding pieces 16a and 16b are opened, and further, the both holding pieces 16a and 16b are respectively rotated to the rear side, As shown in FIG. 1, the yarn feeding bobbin 8 is held in an upright posture. As will be described later, the upright posture of the yarn feeding bobbin 8 becomes a reference posture at the time of yarn unwinding.

  When the yarn feeding bobbin 8 is held in an upright state by the pegs 16, the jumping plate 17 stands by in the horizontal state shown in FIG. 1. At this time, the lower end of the yarn feeding bobbin 8 is placed on the jumping plate 17. It is in contact. From this state, the jumping plate 17 rotates forward, and the yarn feeding bobbin 8 placed thereon is jumped forward to discharge the yarn feeding bobbin 8.

  The above-described rotation of the peg 16 and the rotation of the jump plate 17 are driven by a support unit motor 18 that is controlled by the unit control unit 5 and is a stepping motor.

  In the yarn traveling path between the bobbin support portion 3 and the yarn winding portion 4, the yarn unwinding assist device 20, the tension applying device 21, the yarn joining device 22, the clearer 23, and the waxing device 24 are sequentially arranged from the bobbin support portion 3 side. Is arranged.

  The yarn unwinding assisting device 20 lowers the movable cylindrical body 31 that covers the upper end portion of the yarn supplying bobbin 8 as the unwinding of the yarn Y progresses, so that the yarn Y during unwinding (balloon) Regulate and thereby stabilize the unwinding tension. The detailed configuration of the yarn unwinding assisting device 20 will be described later.

  The tension applying device 21 is for applying a predetermined tension to the traveling yarn Y. As the tension applying device 21, for example, a gate type device having a fixed comb tooth and a movable comb tooth disposed so as to be movable with respect to the fixed comb tooth can be used.

  The yarn joining device 22 includes a yarn on the yarn feeding side (lower yarn) at the time of yarn cutting performed by the clearer 23 described below by detecting a yarn defect, or at the time of yarn breakage during yarn unwinding from the yarn feeding bobbin 8. The yarn on the winding side (upper yarn) is spliced. As the yarn joining device 22, for example, an untwisting nozzle that untwists each of the upper yarn end and the lower yarn end, and a twisting device that twists the untwisted yarn ends by causing a swirling air flow to act on them. A so-called pneumatic yarn splicing device (air splicer) having a nozzle can be used.

  The clearer 23 is for detecting a yarn defect such as a slab, and is provided with a cutter for cutting a yarn when the yarn defect is detected. The waxing device 24 is for applying wax to the yarn Y.

  Above and below the yarn joining device 22, the lower yarn catching guide member 25 that sucks and catches the lower yarn on the bobbin 8 side and guides it to the yarn joining device 22, and the upper yarn on the package P is sucked and caught and the yarn joining device 22. An upper thread catching guide member 26 is provided for guiding the upper thread. The upper thread catching guide member 26 is formed in a pipe shape, and is arranged so as to be pivotable up and down about a shaft 26a, and a mouse 26b is provided at the tip thereof. Similarly, the lower thread catching and guiding member 25 is also configured in a pipe shape, and is disposed so as to be pivotable up and down about a shaft 25a, and a suction port 25b is provided at the tip thereof. Furthermore, an appropriate negative pressure source is connected to the upper thread catching guide member 26 and the lower thread catching guide member 25, and air is sucked from the mouse 26b and the suction port 25b at the distal end to capture the thread end. Can be done.

  The yarn winding unit 4 includes a cradle 27 having a pair of cradle arms that rotatably and detachably supports the winding tube 6, and the surface of the winding tube 6 supported by the cradle 27, or the winding tube 6. A traverse drum 28 that can contact the surface of the formed package P is provided. The yarn winding unit 4 rotates the traverse drum 28 by a drum drive motor (not shown) in a state where the traverse drum 28 is in contact with the winding tube 6 (or the surface of the package P). The winding tube 6 is driven to rotate (following) while traversing and the package P is formed on the outer periphery of the winding tube 6.

  Next, the detailed configuration of the yarn unwinding assisting device 20 will be described. FIG. 2 is a side view of the yarn unwinding assisting device 20, and FIG. 3 is a front view of the yarn unwinding assisting device 20. However, in FIG. 3, a part is shown in cross section for easy understanding of the drawing. As shown in FIGS. 1 to 3, the yarn unwinding assisting device 20 includes a fixed throttle member 30 fixed to the machine base 7, a movable cylinder 31 that can be moved up and down with respect to the fixed throttle member 30, and a yarn feeding bobbin. A chess portion detection sensor 32 (detection means) for detecting eight chess portions 8a (tapered yarn layer portion at the upper end portion where the yarn is unwound), an elevating mechanism 33 for moving the movable cylinder 31 up and down, and the like. Have.

  As shown in FIGS. 1 to 3, the fixed throttle member 30 and the movable cylinder 31 are positioned above the yarn feeding bobbin 8 held in an upright posture by the bobbin support portion 3. FIG. 4 is a perspective view of the fixed throttle member 30 and the movable cylinder 31. The fixed throttle member 30 is provided in a fixed manner on the machine base 7 of the winding unit, and at the lower end of the fixed throttle member 30 is a throttle portion 30a that regulates the yarn path of the yarn unwound from the yarn supplying bobbin 8. Is provided.

  The movable cylinder 31 has a straight cylinder part 31a whose inner diameter does not change in the cylinder axis direction, and a tapered cylinder part 31b which is formed at the lower end of the straight cylinder part 31a and whose diameter increases downward. The straight cylinder part 31 a of the movable cylinder 31 is arranged so as to surround the fixed throttle member 30, and the throttle part 30 a of the fixed throttle member 30 is accommodated inside the straight cylinder part 31 a of the movable cylinder 31. ing. The movable cylindrical body 31 is placed on the upper end portion of the yarn supplying bobbin 8 in a state where the axis is aligned with the core tube 9 of the yarn supplying bobbin 8 in the upright posture (reference posture at the time of yarn unwinding). .

  As described above, in this embodiment, the bobbin supply device 2 adopts a configuration in which the yarn feeding bobbin 8 is obliquely dropped from the magazine 10 to the bobbin support portion 3 via the guide chute 11 as shown in FIG. However, when the yarn feeding bobbin 8 drops onto the peg 16 of the bobbin support portion 3, the fixed throttle member 30 and the movable cylindrical body 31 bring the yarn end of the yarn feeding bobbin 8 to the inside of each. It has a guiding structure. Specifically, as shown in FIG. 4, the fixed throttle member 30 has a guide portion 30b that guides the yarn end to the throttle portion 30a. Further, in the movable cylindrical body 31, a slit 31c is formed over the entire length from the straight cylindrical portion 31a to the tapered cylindrical portion 31b, and the straight cylindrical portion 31a protrudes outward from the edge of the slit 31c, and the yarn end is formed into the slit 31c. A guide portion 31d for guiding is provided. With these configurations, the yarn end of the falling yarn supplying bobbin 8 is guided to the inside from the slit 31c of the movable cylindrical body 31 by the yarn shifting lever (not shown) and the guide portion 31d, and further into the straight cylindrical portion 31a. It is guided to the throttle portion 30a of the fixed throttle member 30 that is housed.

  As shown in FIG. 3, a pair of left and right cover members 34 are attached to the side surface of the movable cylinder 31 so as to sandwich the upper end portion of the yarn feeding bobbin 8. The chess portion detection sensor 32 is a transmissive photosensor including a light emitting element 32a and a light receiving element 32b, and is provided on a pair of cover members 34 so that the light emitting element 32a and the light receiving element 32b face each other. Further, as can be seen from FIG. 2, the optical path from the light emitting element 32a to the light receiving element 32b passes through a position slightly outside the core tube 9 of the yarn feeding bobbin 8 in the upright posture. Only when the yarn is wound around the yarn layer, the yarn layer (chess portion 8a) is detected by blocking the light by the yarn layer. As shown in FIG. 1, the detection result of the chess portion detection sensor 32 (the detection signal of the chess portion 8 a) is sent to the unit controller 5.

  The elevating mechanism 33 that elevates and lowers the movable cylinder 31 includes an elevating motor 35 (driving means) that is a stepping motor and a screw mechanism 36 (transmission mechanism) that transmits the driving force of the elevating motor 35 to the cover member 34. The screw mechanism 36 includes a screw shaft 37 that is directly connected to the drive shaft of the elevating motor 35 and extends in the vertical direction, and a nut member 38 that is screwed into the screw shaft 37 and connected to the cover member 34. A guide shaft 39 extending vertically is inserted through the nut member 38. When the screw shaft 37 is rotationally driven by the driving force of the elevating motor 35, the nut member 38 moves up and down along the guide shaft 39, so that the cover member 34 and the movable cylinder connected to the nut member 38 are obtained. The body 31 and the chess portion detection sensor 32 attached to the cover member 34 move up and down integrally.

  As shown in FIG. 1, the unit controller 5 controls the lifting motor 35 according to the detection result of the chess part detection sensor 32 (whether or not the chess part 8a is detected). That is, when the unwinding of the yarn proceeds and the yarn layer of the chess portion 8a is no longer detected by the chess portion detection sensor 32, the lifting motor 35 is controlled and the chess portion detection sensor 32 detects the chess portion 8a again. The movable cylinder 31 is lowered along the cylinder axis direction until it is done.

  In the yarn unwinding assisting device 20 described above, the movable cylinder 31 is lowered and placed on the upper end portion of the yarn feeding bobbin 8, and winding (yarn unwinding) is performed in this state. As shown in FIG. 3, the movable cylinder 31 restricts the balloon of the yarn Y unwound from the chess portion 8a from inflating beyond a certain level. Accordingly, the tension of the unwound yarn is stabilized. Further, the tapered cylinder portion 31b is formed at the lower end portion of the straight cylinder portion 31a of the movable cylinder 31 so that the unwound yarn is smoothly guided into the straight cylinder portion 31a. The effect of further stabilization and suppression of fluff can be obtained.

  Further, in the present embodiment, the movable cylinder 31 is moved in the cylinder axis direction by the lifting mechanism 33 following the progress of the yarn unwinding of the yarn supplying bobbin 8, so that it is movable with the chess portion 8 a of the yarn supplying bobbin 8. The balloon can always be kept in the same shape by keeping the distance from the cylinder 31 constant, and the yarn unwinding is stabilized. Further, the yarn path is always restricted at the same position by the restricting portion 30a of the fixed restricting member 30, and the balloon formed with the restricting portion 30a as the base point is restricted by the movable cylinder 31, so that the balloon shape is further stabilized. .

  In addition, since a dedicated driving means (lifting motor 35) for moving the movable cylinder 31 is provided, the movable cylinder 31 can be independently operated regardless of the operation of the other operation parts of the winding unit 1. Movement control can be performed. Further, by using a stepping motor as a driving means for the movable cylinder 31, the movement of the movable cylinder 31 can be easily controlled by adjusting the number of drive pulses of the stepping motor. Furthermore, even when the movable cylinder 31 is caught by another member due to a malfunction and cannot be moved, the motor 35 is stepped out, so that damage is prevented. Further, by using the screw mechanism 36 as a transmission mechanism for transmitting the driving force of the lifting motor 35, the movement control of the movable cylinder 31 can be performed with high accuracy. There is also an advantage that the current state is maintained when the driving force of the lifting motor 35 is lost.

  Incidentally, in the automatic winder described above, in order to increase the production efficiency of the package P of each winding unit 1, it is desirable to increase the yarn winding speed in the yarn winding unit 4 (for example, a winding speed of 1700 m / min or more). However, for this reason, when the yarn unwinding speed of the yarn supplying bobbin 8 is increased, the yarn layer is small, so that the balloon does not sufficiently inflate, and the yarn may be unwound without forming the balloon. As a result, the yarn immediately after unwinding tends to rub against the surface of the yarn layer, so that it is easy for slacking (ring-out) to occur and yarn breakage frequently occurs. This state often occurs particularly when the yarn amount of the yarn supplying bobbin 8 becomes 1/3 or less of the full winding.

  Therefore, the inner diameter d2 of the movable cylindrical body 31 in FIG. 3 is larger than the outer diameter D1 of the upper end portion of the core tube 9 of the yarn feeding bobbin 8 so that the balloon is sufficiently inflated even when winding the yarn at a high winding speed. Is also set to a slightly larger value. Specifically, with respect to the outer diameter D1 (17 mm or more and 22 mm or less) of the upper end portion of the core tube 9 of the yarn feeding bobbin 8, the inner diameter d2 of the straight cylinder portion 31a of the movable cylinder 31 is 28 mm or more and 30 mm or less. ing. In this way, by reducing the inner diameter of the movable cylinder 31, the upper part of the balloon is narrowed, and conversely, the balloon can be continuously formed in the lower part close to the thread layer. As a result, the yarn immediately after unwinding does not easily come into contact with the surface of the yarn layer, and sluffing is prevented.

  In the winding unit 1, when two or more types of yarn feeding bobbins 8 having different diameters of the core tube 9 are selectively used, the winding unit 1 has an inner diameter corresponding to each of the two or more types of yarn feeding bobbins 8. The movable cylinder 31 may be used. Hereinafter, an example in which two types of yarn feeding bobbins 8 having different outer diameters of the core tube 9 are used will be described. When the outer diameter D1 of the upper end portion of the core tube 9 of the yarn supplying bobbin 8 is 17 mm or more and 20 mm or less, the movable cylinder 31 having an inner diameter of 28 mm is used, and the outer diameter D1 of the upper end portion of the core tube 9 is 20 mm. If it is larger than 22 mm, the movable cylinder 31 having an inner diameter of 30 mm is used. In this way, by using the movable cylinder 31 having a corresponding inner diameter for each of a plurality of types of yarn feeding bobbins 8 having different diameters of the core tube 9, any yarn feeding bobbin 8 can be used for high-speed yarn feeding. The occurrence of sluffing can be suppressed while winding.

  If the inner diameter of the movable cylinder 31 is reduced, the clearance between the movable cylinder 31 and the yarn supplying bobbin 8 when the movable cylinder 31 is put on the yarn supplying bobbin 8 is reduced. Even if it is slightly tilted from the upright posture (the posture in which the movable cylinder 31 and the axis coincide with each other), which is the standard posture of the kite, the movable barrel 31 contacts the yarn feeding bobbin 8 and causes unwinding failure. Therefore, the winding unit 1 of the present embodiment further has a configuration for keeping the yarn supplying bobbin 8 in an upright posture and aligning the axis of the core tube 9 of the yarn supplying bobbin 8 with the axis L of the movable cylinder 31. (Attitude adjustment means).

  In the present embodiment, the posture adjustment of the yarn feeding bobbin 8 is performed using the detection result of the chess portion detection sensor 32. FIG. 5 is a view for explaining the posture adjustment of the yarn supplying bobbin 8. When the yarn supplying bobbin 8 is supplied to the bobbin support portion 3 by the bobbin supplying device 2, the peg 16 is rotated rearward after the yarn supplying bobbin 8 is held by the peg 16 (see FIG. 1) of the bobbin supporting portion 3. Then, as shown in FIG. 5A, the yarn feeding bobbin 8 is in an upright posture. However, the axis of the yarn feeding bobbin 8 at this time may be slightly inclined with respect to the axis L of the movable cylinder 31. There are several possible reasons for this. In particular, the peg 16 of this embodiment is configured to hold the yarn feeding bobbin 8 with only two holding pieces 16a and 16b, and the posture of the yarn feeding bobbin 8 is likely to be wobbled. It is mentioned that stability is somewhat low.

  Therefore, the axis of the yarn feeding bobbin 8 is made to coincide with the axis L of the movable cylinder 31 as follows. First, in the state of FIG. 5A before adjusting the posture of the yarn supplying bobbin 8, the movable cylinder 31 is waiting on the upper side (the state where it is not covered with the yarn supplying bobbin 8). Nothing is detected. From this state, the unit controller 5 controls the support motor 18 that drives the peg 16 to rotate (swing) the yarn feeding bobbin 8 to the front side (right side in the figure). As shown, the rotation is stopped when the upper end portion of the yarn feeding bobbin 8 is detected by the chess portion detection sensor 32.

  Here, the storage unit included in the unit control unit 5 drives the support unit motor 18 by the number of pulses from the position where the yarn feeding bobbin 8 is detected by the chess portion detection sensor 32 in FIG. If the bobbin 8 is swung to the rear side (left side in the figure), it is stored in advance whether the movable cylinder 31 and the axial center coincide with each other. Therefore, the unit control section 5 outputs the number of pulses stored in the storage section to the support section motor 18 and swings the yarn feeding bobbin 8 backward by an angle corresponding to the number of pulses. Thereby, the axis of the yarn feeding bobbin 8 can be made to coincide with the axis L of the movable cylinder 31.

  In this way, by aligning the axis of the core tube 9 of the yarn supplying bobbin 8 with the axis L of the movable cylinder 31, the movable cylinder 31 is lowered to cover the end of the yarn supplying bobbin 8. Even if the clearance between the movable cylindrical body 31 and the core tube 9 of the yarn supplying bobbin 8 is small, the movable cylindrical body 31 and the yarn supplying bobbin 8 are unlikely to contact each other. Accordingly, the inner diameter of the movable cylindrical body 31 can be set to a diameter of 28 mm or more and 30 mm or less, which is slightly larger than the outer diameter of the core tube 9 of the yarn feeding bobbin 8, thereby enabling high winding speed. Even when the yarn is wound, the balloon of the yarn to be unwound is sufficiently inflated, and the occurrence of sluffing is suppressed.

  Next, specific examples in which the effects of the present invention are verified will be described. Here, two types of yarn feeding bobbins having different core tube diameters and the like were used, and the winding of the yarn was performed by changing the inner diameter of the movable cylinder for each.

(Yarn feeding bobbin)
FIG. 6 shows an external view of the yarn feeding bobbin used in this example. Table 1 shows the yarn types and the values of main dimensions shown in FIG. 6 for two types of yarn feeding bobbins. The yarn counts in Table 1 are indicated in English cotton counts.

(Movable cylinder)
For the movable cylinder, the inner diameter of the straight cylinder (d2 in FIG. 3) is 28 mm (hereinafter referred to as φ28), 30 mm (φ30), 32 mm (φ32), 34 mm (φ34), and 38 mm (respectively). A total of 5 types of φ38) were used. However, among the above-mentioned five types of movable cylinders, φ28 and φ32 are used for the small diameter bobbin A (core tube outer diameter D1 = 18.1 mm), and φ30, φ34, and φ38 are the large diameter bobbins 8 ( (Core tube outer diameter D1 = 20.4 mm).

(inspection result)
For each of the two types of yarn feeding bobbins, bobbin A and bobbin B in Table 1, sluffing (rings) per yarn feeding bobbin when winding the yarn while changing the winding speed and the diameter of the movable cylinder The number of occurrences of omission was measured. The results are shown in FIGS. In addition, in FIG. 8, the movable cylinder with the largest diameter of φ38 has a lot of sluffing even at a relatively low winding speed of 1400 to 1500 m / min, and the winding speed is further increased. Furthermore, since it can be easily predicted that sluffing frequently occurs, verification at a winding speed of 1600 m / min or more is not performed.

  With respect to the bobbin A in FIG. 7, in the movable cylinder of φ32, the occurrence of sluffing is extremely increased as the winding speed is increased, whereas in φ28, even at the time of high-speed winding of 1700 m / min, The occurrence of sluffing is very low. Also, in the bobbin B of FIG. 8, when a movable cylinder having a small diameter of φ30 is used, the occurrence of sluffing is extremely less than that of the larger diameter movable cylinders φ34 and φ38. From the above, it can be seen that when the inner diameter of the movable cylindrical body is 28 mm or more and 30 mm or less, the effect of suppressing the sluffing becomes very high.

  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, as shown in FIG. 1, the bobbin supply device 2 is a so-called magazine type that drops from the magazine 10 to the peg 16 of the bobbin support 3, and is supplied when it drops from the magazine 10. In order to introduce the yarn end of the yarn bobbin 8 into the interior, the fixed throttle member 30 and the movable cylindrical body 31 are provided with guide portions 30a and 31d, a slit 31c, and the like (see FIG. 4). However, if the yarn ends are inserted in the axial direction with respect to the fixed throttle member 30 and the movable cylindrical body 31, the fixed throttle member 30 and the movable cylindrical body 31 have a simple annular or cylindrical shape without a break. A thing can also be adopted. For example, the bobbin supply device 2 has a tray on which the yarn supplying bobbin 8 is inserted, and supplies the yarn supplying bobbin 8 to the yarn unwinding position below the movable cylinder 31 together with this tray. In the case of a winder (for example, Japanese Patent Laid-Open No. 8-127471), the above configuration can be particularly preferably employed.

2] The elevating mechanism 33 of the movable cylinder 31 is not limited to the elevating motor 35 (stepping motor) and the screw mechanism 36 of the above embodiment.

  For example, an air cylinder may be used as the driving means instead of the stepping motor. In this case, since the movable cylinder 31 can be linearly moved by the forward / backward drive of the rod of the air cylinder, the configuration of the transmission mechanism that transmits the driving force of the driving means to the movable cylinder 31 is simplified.

  Further, as shown in FIG. 9, the transmission mechanism of the elevating mechanism 33 has a transmission belt 40 connected to the movable cylinder 31, and the driving force of the driving means (elevating motor 35 in the figure) is transmitted via the transmission belt 40. Then, it may be transmitted to the movable cylinder 31. In this way, by adopting a configuration in which the driving force is transmitted by the transmission belt 40 that does not use an oil agent such as a lubricant, the occurrence of problems due to the fluff drifting around the winding unit 1 being entangled in the transmission mechanism is reduced. Can do.

3] In the above-described embodiment, the yarn unwinding assisting device 20 includes the fixed throttle member 30 having the throttle portion 30a. However, the fixed throttle member 30 is omitted, and the restriction of the balloon is restricted only by the movable cylinder 31. It may be configured to do.

4] In the above-described embodiment, the movable cylinder 31 is moved up and down as the yarn unwinding proceeds. However, the cylinder may always be fixed at a predetermined position.

5] In the above embodiment, the chess portion detection sensor 32 that detects the chess portion 8a at the time of yarn unwinding is used, and the yarn feeding bobbin 8 before the yarn unwinding is in the reference posture (the cylindrical body 31 and the shaft center). However, a dedicated sensor for detecting whether or not the yarn feeding bobbin 8 is in the reference posture may be provided.

  Alternatively, if the posture stability of the yarn feeding bobbin 8 by the bobbin support portion 3 is high and the yarn feeding bobbin 8 can always be held in the reference posture during yarn unwinding, the yarn feeding bobbin 8 as described above is used. It is not necessary to adjust the posture. Examples of the configuration of the bobbin support portion having such a high posture stability include the following.

  For example, as shown in FIG. 10, the bobbin support portion includes a core member 41 inserted into the core tube 9 of the yarn feeding bobbin 8, and an annular elastic member 42 made of rubber or the like disposed around the core member 41. It may have. After the core member 41 is inserted into the core tube 9 in a state where the diameter of the annular elastic member 42 is not increased as shown in FIG. 10A, the diameter is not shown in FIG. 10B. The diameter is expanded by the mechanism and is in close contact with the inner surface of the core tube 9. Thereby, the posture of the yarn feeding bobbin 8 is stabilized, and the state where the axis of the core tube 9 is aligned with the axis of the movable cylinder 31 can be maintained. Further, the elastic member may be a bag-like (balloon-like) inflated by air injection.

  Alternatively, the bobbin support portion has three or more projecting pieces each inserted into the core tube 9 of the yarn feeding bobbin 8, and the three or more projecting pieces cooperate to hold the core tube 9. (Although not illustrated, for example, a configuration disclosed in Japanese Patent Laid-Open No. 2006-89284). When the yarn feeding bobbin 8 is held by only two projecting pieces as in the peg 16 (see FIG. 1) of the above embodiment, the posture is slightly shaken, and the axis of the core tube 9 and the cylindrical body Although it is easy to shift from the shaft center, the yarn feeding bobbin 8 is held by a plurality of three or more projecting pieces, whereby the state where the shaft center of the core tube 9 is aligned with the shaft center of the cylindrical body can be maintained.

DESCRIPTION OF SYMBOLS 1 Winding unit 6 Winding pipe 8 Feeding bobbin 8a Chess part 9 Core pipe 20 Thread unwinding auxiliary device 30 Fixed throttle member 30a Throttle part 31 Movable cylinder 31a Straight cylinder part 31b Tapered cylinder part 32 Chess part detection sensor 35 Elevation Motor 36 Screw mechanism 40 Transmission belt 41 Core member 42 Elastic member P Package

Claims (14)

A bobbin support for supporting a yarn feeding bobbin in which a thread is wound around a core tube;
A yarn winding portion that winds the yarn unwound from the yarn feeding bobbin supported by the bobbin support portion to form a package;
A yarn unwinding assisting device for assisting unwinding of the yarn from the yarn feeding bobbin,
The yarn unwinding assist device is:
When unwinding the yarn, it has a cylindrical body that covers the end of the yarn feeding bobbin on the yarn unwinding side and regulates the swelling of the yarn when unwound from the yarn feeding bobbin,
An inner diameter of the cylindrical body is 28 mm or greater and 30 mm or less. The yarn unwinding assisting device has a detecting means for detecting a yarn layer of the yarn feeding bobbin;
2. The yarn winding device according to claim 1, wherein the cylindrical body moves in a direction of the cylindrical axis and in a direction approaching the yarn layer in accordance with a detection result of the detection unit. The yarn unwinding assist device has a fixed throttle member provided with a throttle part,
3. The yarn winding device according to claim 2, wherein the cylindrical body is disposed so as to surround the fixed throttle member, and is configured to be movable in the cylindrical axis direction with respect to the fixed throttle member.   3. The yarn unwinding assist device includes drive means for moving the cylinder in the cylinder axis direction, and a transmission mechanism that transmits the driving force of the drive means to the cylinder. Or the yarn winding device according to 3.   The yarn winding device according to claim 4, wherein the driving means is a stepping motor.   The yarn winding device according to claim 4, wherein the driving means is an air cylinder.   The yarn winding device according to any one of claims 4 to 6, wherein the transmission mechanism is a screw mechanism.   The yarn winding device according to any one of claims 4 to 6, wherein the transmission mechanism includes a transmission belt connected to the cylindrical body. The cylindrical body includes a straight cylindrical portion having a constant inner diameter, and a tapered cylindrical portion having a tapered shape that is continuous with an end portion of the straight cylindrical portion on the yarn feeding bobbin side and increases in diameter toward the outer end. ,
The yarn winding device according to any one of claims 1 to 8, wherein an inner diameter of the straight tube portion is 28 mm or more and 30 mm or less.   Characterized in that it comprises posture adjusting means for adjusting the posture of the yarn feeding bobbin during yarn unwinding so that the axis of the core tube of the yarn feeding bobbin coincides with the axis of the cylindrical body. The yarn winding device according to any one of claims 1 to 9.   The said bobbin support part is inserted in the said core pipe of the said yarn feeding bobbin, and has a some 3 or more some protrusion piece which hold | maintains the said core pipe in cooperation. A yarn winding device according to claim 1.   The bobbin support portion is disposed around a core member inserted into the core tube of the yarn feeding bobbin, and an inner surface of the core tube when the core member is inserted into the core tube The yarn winding device according to claim 1, further comprising an elastic member that is in close contact with the yarn. A method of unwinding a yarn from a yarn feeding bobbin in which a yarn is wound around a core tube,
A cylindrical body having an inner diameter of 28 mm or more and 30 mm or less is arranged at the end portion on the yarn unwinding side of the core tube having an outer diameter of 17 mm or more and 22 mm or less in a state where the axial center of the cylindrical body is aligned with the axial center of the yarn feeding bobbin. Cover,
A yarn unwinding method characterized by restricting the swelling of the yarn unwound from the yarn supplying bobbin by the cylindrical body. When the outer diameter of the core tube of the yarn feeding bobbin is 17 mm or more and 20 mm or less, use a cylinder having an inner diameter of 28 mm,
The yarn unwinding method according to claim 13, wherein when the outer diameter of the core tube is larger than 20 mm and not larger than 22 mm, a cylindrical body having an inner diameter of 30 mm is used.