EP2987755A1

EP2987755A1 - Yarn winding device and automatic winder

Info

Publication number: EP2987755A1
Application number: EP15175718.4A
Authority: EP
Inventors: Masao Hirukawa
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2014-08-21
Filing date: 2015-07-07
Publication date: 2016-02-24
Anticipated expiration: 2035-07-07
Also published as: EP2987755B1; JP2016044016A; CN105384007B; CN105384007A

Abstract

A yarn storage section provided between a yarn supplying section and a package forming section includes a rotary storage drum (50) adapted to wind and store a yarn (Y). A traveler (73) adapted to move at a periphery of the rotary storage drum (50) by moving along an annular guide rail (72) extending to surround the outer peripheral surface of the rotary storage drum (50) in a peripheral direction is provided at an end on the package forming section side in an axial direction of the rotary storage drum (50). The traveler (73) includes an opening (73a) at an end on the yarn supplying section in the axial direction of the rotary storage drum (50). During yarn hooking operation on a winding unit, the yarn (Y) passed between the yarn supplying section and the package forming section is introduced to the traveler (73) from the opening (73a) to hook the yarn (Y) to the traveler (73), and the rotary storage drum (50) is rotated in this state to wind the yarn (Y) around the rotary storage drum (50), whereby the yarn (Y) is hooked to the rotary storage drum (50).

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a yarn winding device adapted to wind a yarn unwound from a yarn supplying bobbin to form a package, and an automatic winder including the yarn winding device.

2. Description of the Related Art

WO 2011/040546 A1 describes, as a winding unit of an automatic winder, a winding unit in which an accumulator adapted to store a yarn is provided between a yarn supplying section and a winding section. Furthermore, WO 2011/040546 A1 describes, as the accumulator, an accumulator including a rotary storage drum. The rotary storage drum unwinds the yarn from the yarn supplying bobbin and winds and stores the unwound yarn by rotating. The winding section pulls out the yarn stored on the rotary storage drum and winds the pulled-out yarn to form a package. An annular member made of a rubber material is wound around an end on the winding section side in an axial direction of the rotary storage drum. The yarn wound around the rotary storage drum is passed between the rotary storage drum and the annular member, and then fed towards the winding section. Thus, when the winding section pulls out the yarn from the rotary storage drum, the pulled-out yarn can be prevented from greatly bulging (balloon is prevented from being enlarged) towards an outer side by a centrifugal force with the annular member.
In WO 2011/040546 A1 , the yarn is passed between the rotary storage drum and the annular member, and then fed towards the winding section, as described above. Thus, when carrying out yarn hooking on the winding unit, the operator needs to carry out an operation of passing the yarn unwound from the yarn supplying bobbin through a gap between the rotary storage drum and the annular member, and then guiding the yarn to the winding section. As a result, the operation for yarn hooking becomes complex.

BRIEF SUMMARY OF THE INVENTION

It is an object of the present invention to provide a yarn winding device capable of easily carrying out yarn hooking, and an automatic winder including the yarn winding device.
A yarn winding device according to the present invention includes a yarn supplying section including a bobbin supporting section adapted to support a yarn supplying bobbin around which a yarn spun by a ring spinning machine is wound; a yarn storage section adapted to store the yarn from the yarn supplying bobbin; a package forming section adapted to pull out the yarn stored in the yarn storage section and wind the yarn to form a package; a yarn defect detection device adapted to detect a yarn defect in the yarn spun by the ring spinning machine and cut the yarn to remove the yarn defect when the yarn defect is detected; and a yarn joining section provided between the yarn supplying section and the yarn storage section and adapted to join the yarn from the yarn supplying section and the yarn from the yarn storage section when the yarn is cut by the yarn defect detection device or when the yarn of the yarn supplying bobbin runs out and a new yarn supplying bobbin is supplied to the yarn supplying section, wherein the yarn storage section includes a rotary storage drum adapted to wind and store the yarn from the yarn supplying bobbin by rotating, the rotary storage drum includes a drum body adapted to store the yarn by winding the yarn, and a yarn regulating section provided at an end on the package forming section side in an axial direction of the drum body and adapted to regulate movement of the pulled-out yarn when the yarn is pulled out from the drum body towards the package forming section, and the yarn regulating section is configured to hook the yarn passed between the yarn supplying section and the package forming section and to wind the yarn around the rotary storage drum when the rotary storage drum is rotated in the yarn hooked state.
According to the present invention, when the yarn is pulled out from the rotary drum to the package forming section, the movement of the pulled-out yarn is regulated by the yarn regulating section. Thus, the pulled-out yarn is held, and the slackening of the yarn stored on the drum body can be prevented. Furthermore, according to the present invention, the yarn regulating section is configured to be able to hook the yarn passed between the yarn supplying section and the package forming section. Thus, the yarn can be hooked to the yarn regulating section after crossing the yarn between the yarn supplying section and the package forming section, so that the yarn hooking operation on the yarn regulating section can be easily carried out. Furthermore, by carrying out the yarn hooking operation on the yarn regulating section and then rotating the rotary storage drum, the yarn is wound around the rotary drum and the yarn hooking operation on the rotary storage drum is carried out. The yarn hooking operation on the rotary drum thus can be easily carried out.
In the yarn winding device according to the present invention, the rotary storage drum unwinds and stores the yarn from the yarn supplying bobbin by rotating.
According to the present invention, since the yarn is unwound from the yarn supplying bobbin and stored by rotating the rotary storage drum, a structure for unwinding the yarn from the yarn supplying bobbin apart from the rotary storage drum is not necessary.
In the yarn winding device according to the present invention, a portion of the yarn regulating section is located on a yarn path of the yarn passed between the yarn supplying section and the package forming section, and the yarn is hooked to the yarn regulating section by rotating the rotary storage drum with the yarn passed between the yarn supplying section and the package forming section.
According to the present invention, when the rotary drum is rotated with the yarn passed between the yarn supplying section and the package forming section, the yarn is automatically hooked to the yarn regulating section. Therefore, the operator does not need to perform the operation of manually hooking the yarn to the yarn regulating section, whereby the yarn hooking operation on the yarn winding device can be simplified.
The yarn winding device according to the present invention further includes a yarn storage amount detecting section adapted to detect a storage amount of the yarn stored on the rotary storage drum; and a first control section adapted to control the device, wherein the first control section causes the package forming section to continue a package forming operation of pulling out and winding the yarn from the yarn storage section and causes the package forming section to reduce a pull-out speed of the yarn from the yarn storage section during the package forming operation as the storage amount of the yarn detected by the yarn storage amount detecting section becomes smaller when causing the yarn joining device to carry out a yarn joining operation.
According to the present invention, when pulling out the yarn from the yarn storage section to form the package during the yarn joining operation, since the pull-out speed of the yarn from the yarn storage section to the package forming section is reduced as the remaining amount of the yarn stored in the yarn storage section becomes smaller, a time during which the package forming operation can be continued with the unwinding of the yarn from the yarn supplying package stopped can be increased. Thus, the time that can be used for the yarn joining operation can be increased without increasing the amount of yarn to be stored in the yarn storage section.
In the yarn winding device according to the present invention, the yarn regulating section includes a yarn hooking section configured to be movable in a peripheral direction of the rotary storage drum along an outer peripheral surface of the rotary storage drum, and configured to hook the yarn passed between the yarn supplying section and the package forming section.
According to the present invention, when the yarn is pulled out from the rotary storage drum to the package forming section, the movement of the pulled-out yarn is regulated by the yarn hooking section. Thus, the pulled-out yarn is held, and the yarn wound around the rotary storage drum can be prevented from slackening. When the yarn is pulled out from the rotary storage drum to the package forming section, the yarn hooking section moves in the peripheral direction of the rotary storage drum along the outer peripheral surface of the rotary storage drum together with the pulled-out yarn, and thus can smoothly pull out the yarn. Moreover, according to the present invention, the yarn hooking operation can be carried out on the rotary drum by rotating the rotary drum with the yarn passed between the yarn supplying section and the package forming section hooked to the yarn hooking section.
In the yarn winding device according to the present invention, the yarn regulating section includes an annular guide rail that surrounds the outer peripheral surface of the rotary storage drum in the peripheral direction, and a traveler serving as the yarn hooking section configured to be movable along the guide rail and configured to hook the yarn passed between the yarn supplying section and the package forming section.
According to the present invention, when the yarn is pulled out from the rotary storage drum to the package forming section, the movement of the pulled-out yarn is regulated by the traveler. Thus, the pulled-out yarn is held, and the yarn wound around the rotary storage drum can be prevented from slackening. When the yarn is pulled out from the rotary storage drum to the package forming section, the traveler moves in the peripheral direction of the rotary storage drum along the outer peripheral surface of the rotary storage drum together with the pulled-out yarn, and thus can smoothly pull out the yarn. Moreover, according to the present invention, the yarn hooking operation can be carried out on the rotary drum by rotating the rotary drum with the yarn passed between the yarn supplying section and the package forming section hooked to the traveler.
In the yarn winding device according to the present invention, the traveler includes an opening through which the yarn passed between the yarn supplying section and the package forming section is introduced, and the yarn hooking operation is carried out by introducing the yarn from the opening.
According to the present invention, the yarn passed between the yarn supplying section and the package forming section can be hooked to the traveler by simply introducing the yarn to the traveler from the opening.
In the yarn winding device according to the present invention, the yarn regulating section further includes a resistance applying section adapted to apply a resistance that inhibits the movement with respect to the rotary storage drum on the traveler.
According to the present invention, when the traveler moves along the outer peripheral surface of the rotary storage drum in conjunction with the yarn being pulled out from the rotary storage drum to the package forming section, the resistance that inhibits the movement with respect to the rotary storage drum is applied to the traveler so that the tension to be applied to the yarn to be pulled out can be increased. If the resistance that inhibits the movement of the traveler with respect to the rotary drum is too small, the traveler does not move and the yarn may not be hooked to the rotary storage drum even if the rotary storage drum is rotated with the yarn hooked to the traveler. In the present invention, the resistance that inhibits the movement with respect to the rotary storage drum is applied to the traveler by the resistance applying section. Therefore, when the rotary storage drum is rotated with the yarn hooked to the traveler, the traveler reliably moves in conjunction with the rotation of the rotary storage drum. The yarn thus can be reliably hooked to the rotary storage drum.
In the yarn winding device according to the present invention, the resistance applying section includes a contact plate which is provided on the package forming section side of the traveler in the axial direction of the rotary storage drum and adapted to make contact with the traveler.
According to the present invention, the resistance that inhibits the movement with respect to the rotary storage drum can be applied to the traveler by bringing the contact plate provided on the rotary storage drum into contact with a movement guide.
In the yarn winding device according to the present invention, the traveler is made of a metal material, and the resistance applying section includes a magnet provided on the rotary storage drum.
According to the present invention, the resistance that inhibits the movement with respect to the rotary storage drum can be applied to the traveler by a magnetic force generated between the traveler made of a ferromagnetic material and a magnet provided on the rotary storage drum.
In the yarn winding device according to the present invention, the magnet is provided on the guide rail.
According to the present invention, the resistance that inhibits the movement with respect to the rotary storage drum can be applied to the traveler by a magnetic force between the traveler made of a ferromagnetic material and a magnet provided on the guide rail.
In the yarn winding device according to the present invention, the rotary storage drum includes a base material that is made of a metal material and that faces the traveler, and the resistance applying section includes a magnet provided on the traveler.
According to the present invention, the resistance that inhibits the movement with respect to the rotary storage drum can be applied to the traveler by a magnetic force between the magnet provided on the traveler and a ferromagnetic portion of the rotary storage drum.
In the yarn winding device according to the present invention, the resistance applying section includes a resistance applying brush which is provided on the rotary storage drum and adapted to make contact with the traveler.
According to the present invention, the resistance that inhibits the movement with respect to the rotary storage drum can be applied to the traveler by providing the resistance applying brush that makes contact with the traveler on the rotary storage drum.
In the yarn winding device according to the present invention, the yarn regulating section includes a rod-shaped member provided on an end face on the package forming section side in the axial direction of the rotary storage drum, rotatably supported by a central shaft of the rotary storage drum, and extending in a radial direction of the rotary storage drum, a distal end of the rod-shaped member being the yarn hooking section.
According to the present invention, when the yarn is pulled out from the rotary storage drum to the package forming section, the movement of the pulled-out yarn is regulated by the rod-shaped member. Thus, the pulled-out yarn is held, and the yarn wound around the rotary storage drum can be prevented from slackening. When the yarn is pulled out from the rotary storage drum to the package forming section, the rod-shaped member rotates together with the pulled-out yarn and thus can smoothly pull out the yarn. Moreover, the yarn hooking operation can be carried out on the rotary drum by rotating the rotary drum with the yarn passed between the yarn supplying section and the package forming section hooked to the yarn hooking section of the rod-shaped member.
In the yarn winding device according to the present invention, the yarn regulating section further includes a resistance applying section adapted to apply a resistance that inhibits the rotation with respect to the rotary storage drum on the rod-shaped member.
According to the present invention, when the rod-shaped member is rotated in conjunction with the yarn being pulled out from the rotary storage drum to the package forming section, the rod-shaped member receives the resistance that inhibits the rotation with respect to the rotary storage drum so that the tension to be applied to the yarn to be pulled-out can be increased. If the resistance that inhibits the rotation with respect to the rotation drum received by the rod-shaped member is too small, the rod-shaped member does not rotate even if the rotary storage drum is rotated with the yarn hooked to the rod-shaped member, and the yarn hooking operation may not be carried out on the rotary storage drum. In the present invention, the resistance that inhibits the movement with respect to the rotary storage drum is applied to the rod-shaped member by the resistance applying section. Therefore, when the rotary storage drum is rotated with the yarn hooked to the rod-shaped member, the rod-shaped member reliably rotates in conjunction with the rotation of the rotary storage drum. The yarn hooking operation thus can be reliably carried out on the rotary storage drum.
In the yarn winding device of the present invention, the rod-shaped member is made of a ferromagnetic material, and the resistance applying section includes a magnet provided on an end face of the package forming section side in the axial direction of the rotary storage drum.
According to the present invention, the resistance that inhibits the rotation with respect to the rotary storage drum can be applied to the rod-shaped member by a magnetic force generated between the rod-shaped member made of a ferromagnetic material and a magnet provided on the rotary storage drum.
In the yarn winding device according to the present invention, the resistance applying section includes a first resistance applying brush which is provided on an end face of the package forming section side in the axial direction of the rotary storage drum and adapted to make contact with a portion extending in a radial direction of the rotary storage drum of the rod-shaped member.
According to the present invention, the resistance that inhibits the rotation with respect to the rotary storage drum can be applied to the rod-shaped member by providing the first resistance applying brush that makes contact with the portion extending in the radial direction of the rotary storage drum of the rod-shaped member on the end face in the axial direction of the rotary storage drum.
In the yarn winding device according to the present invention, the resistance applying section includes a second resistance applying brush which is provided at a portion extending in a radial direction of the rotary storage drum of the rod-shaped member and adapted to make contact with an end face on the package forming section side in the axial direction of the rotary storage drum.
According to the present invention, the resistance that inhibits the rotation with respect to the rotary storage drum can be applied to the rod-shaped member by providing the second resistance applying brush that makes contact with the end face in the axial direction of the rotary storage drum at the portion extending in the radial direction of the rotary storage drum of the rod-shaped member.
In the yarn winding device according to the present invention, the yarn regulating section includes a yarn regulating brush which is provided on the rotary storage drum and adapted to make contact with a yarn pulled out from the rotary storage drum towards the package forming section.
According to the present invention, the movement of the yarn pulled out from the rotary storage drum is regulated by being caught at bristles of the yarn regulating brush. Thus, the pulled-out yarn is held, and the yarn wound around the rotary storage drum can be prevented from slackening. Furthermore, the yarn can be hooked to the yarn regulating brush by bringing the yarn passed between the yarn supplying section and the package forming section into contact with the yarn regulating brush and hooking the yarn to the bristles of the yarn regulating brush, and the yarn can be hooked to the rotary storage drum by rotating the rotary storage drum under this state.
In the yarn winding device according to the present invention, the yarn regulating section includes a ring member wound around an outer peripheral surface of the rotary storage drum, and the ring member includes a yarn passage through which the yarn passed between the yarn supplying section and the package forming section is introduced from a region on an outer side to a region on an inner side of the ring member in the radial direction of the rotary storage drum.
According to the present invention, the movement of the yarn pulled out from the rotary storage drum is regulated by being brought into contact with the ring member. Thus, the pulled-out yarn is held, and the yarn wound around the rotary storage drum can be prevented from slackening. Furthermore, the yarn can be hooked to the winding member by introducing, through the yarn passage, the yarn passed between the yarn supplying section and the package forming section from the region on the outer side to the region on the inner side in the radial direction of the winding member of the rotary drum, and the yarn can be hooked to the rotary storage drum by rotating the rotary storage drum under this state.
In the yarn winding device according to the present invention, the ring member is spirally wound around the outer peripheral surface of the rotary storage drum in a range longer than one turn in the peripheral direction, and a gap formed between portions overlapping each other in the ring member is the yarn passage.
According to the present invention, the ring member is spirally wound in a range longer than one turn in the peripheral direction of the rotary storage drum, so that the gap to become the yarn passage can be formed between the portions overlapping each other in the spirally-wound ring member.
An automatic winder according to the present invention is an automatic winder in which a plurality of the yarn winding devices according to the present invention are arranged, the automatic winder further including a yarn hooking device adapted to hook the yarn of the yarn supplying bobbin supported by the bobbin supporting section of the plurality of yarn winding devices to the package forming section; and a second control section adapted to control operations of the yarn winding device and the yarn hooking device; wherein the second control section causes the yarn hooking device to hook the yarn passed between the yarn supplying section and the package forming section of the plurality of yarn winding devices to the package forming section, and to hook the yarn passed between the yarn supplying section and the package forming section to the rotary storage drum by rotating the rotary storage drum with the yarn hooked to the yarn regulating section.
According to the present invention, the yarn can be automatically hooked to the package forming section and the rotary storage drum in the plurality of yarn winding devices of the automatic winder.
According to the present invention, the yarn can be hooked to the yarn regulating section after the yarn is passed between the yarn supplying section and the package forming section, so that the yarn can be easily hooked to the yarn regulating section. Furthermore, by carrying out the yarn hooking operation on the yarn regulating section and then rotating the rotary storage drum, the yarn is wound around the rotary drum and the yarn hooking operation on the rotary storage drum is carried out. The yarn hooking operation on the rotary drum thus can be easily carried out.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view illustrating a schematic configuration of an automatic winder according to an embodiment of the present invention;
FIG. 2 is a block diagram illustrating a schematic electrical configuration of the automatic winder according to the embodiment of the present invention;
FIG. 3 is a view illustrating a schematic structure of a winding unit seen from an arrangement direction;
FIG. 4 is a view illustrating a yarn storage section 13 of FIG. 3 and a portion at a periphery thereof in an enlarged manner;
FIG. 5A is a cross-sectional view taken along an axial direction of a rotary storage drum, and FIG. 5B is a view of the rotary storage drum seen from a package forming section side;
FIG. 6 is a view illustrating a state of the yarn storage section when a yarn is passed between the yarn supplying section and the package forming section in an initial yarn hooking operation;
FIG. 7 is a view illustrating a state of the yarn storage section when the yarn hooking operation on a traveler is carried out in the initial yarn hooking operation;
FIG. 8 is a flowchart illustrating a flow of operations of the winding unit;
FIG. 9 is a view illustrating a state of the yarn storage section when the yarn hooking operation on the rotary storage drum is carried out in the initial yarn hooking operation;
FIG. 10A is a flowchart illustrating a flow of a yarn defect removing operation, FIG. 10B is a flowchart illustrating a flow of a yarn breakage recovering operation, and FIG. 10C is a flowchart illustrating a flow of a bobbin replacing operation;
FIG. 11 is a flowchart illustrating a flow of control of a rotation speed of the rotary storage drum during normal winding;
FIG. 12 is a flowchart illustrating a flow of control of a rotation speed of the winding drum;
FIG. 13 is a view corresponding to FIG. 6 according to a first alternative embodiment;
FIG. 14 is a view corresponding to FIG. 5A according to a second alternative embodiment;
FIG. 15A is a view corresponding to FIG. 5A according to a third alternative embodiment, and FIG. 15B is a view corresponding to FIG. 5A according to a fourth alternative embodiment;
FIG. 16 is a view corresponding to FIG. 5A according to a fifth alternative embodiment;
FIG. 17A is a view corresponding to FIG. 5A according to a sixth alternative embodiment, and FIG. 17B is a view corresponding to FIG. 5B according to the sixth alternative embodiment;
FIG. 18A is a view corresponding to FIG. 5A according to a seventh alternative embodiment, and FIG. 18B is a view corresponding to FIG. 5B according to the seventh alternative embodiment;
FIG. 19 is a view corresponding to FIG. 4 according to an eighth alternative embodiment;
FIG. 20A is a view corresponding to FIG. 5A according to the eighth alternative embodiment, and FIG. 20B is a view corresponding to FIG. 5B according to the eighth alternative embodiment;
FIG. 21A is a view corresponding to FIG. 5A according to a ninth alternative embodiment, and FIG. 21B is a view corresponding to FIG. 5B according to the ninth alternative embodiment;
FIG. 22A is a view corresponding to FIG. 5A according to a tenth alternative embodiment, and FIG. 22B is a view corresponding to FIG. 5B according to the tenth alternative embodiment;
FIG. 23A is a view of a rotary storage drum according to an eleventh alternative embodiment seen in the same direction as FIG. 4, and FIG. 23B is a view of FIG. 23A seen from the package forming section side excluding a flange;
FIG. 24 is a view corresponding to FIG. 4 according to a twelfth alternative embodiment; and
FIG. 25A is a view corresponding to FIG. 5A according to a thirteenth alternative embodiment, and FIG. 25B is a view corresponding to FIG. 5B according to the thirteenth alternative embodiment.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

A description will be made on a preferred embodiment of the present invention.

(Overall configuration of automatic winder)

As illustrated in FIGS. 1 and 2, an automatic winder 1 according to the present embodiment includes a plurality of winding units 2 ("yarn winding device" of the present invention), an automatic doffing device 3 ("yarn hooking device" of the present invention), and a control device 4. The plurality of winding units 2 are arranged in a predetermined arrangement direction (left and right direction in FIG. 1). The winding unit 2 winds a yarn Y unwound from a yarn supplying bobbin Bk, around which the yarn spun by a ring spinning machine is wound, around a winding bobbin Bm to form a package P. The winding unit 2 includes a first control section 10, and the operation of the winding unit 2 is controlled by the first control section 10. The automatic doffing device 3 is arranged above the plurality of winding units 2. The automatic doffing device 3 moves in the arrangement direction across the plurality of winding units 2, and is adapted to collect the package P formed by the winding unit 2, mount an empty winding bobbin Bm, and carry out a predetermined yarn hooking operation on this winding bobbin Bm. The automatic doffing device 3 also includes a second control section 9, and the operation of the automatic doffing device 3 is controlled by the second control section 9. The control device 4 is electrically connected to the first control section 10 of each of the plurality of winding units 2 and the second control section 9 of the automatic doffing device 3, and carries out instructions of control to each control section 9, 10, reception of signals from each control section 9, 10, and the like.

(Winding unit)

Next, a description will be made on the winding unit 2. As illustrated in FIGS. 3 to 5B, the winding unit 2 includes a yarn supplying section 11, a package forming section 12, a yarn storage section 13, and a yarn processing section 14. A front and back direction in FIGS. 3, 4, and 5A is a direction orthogonal to both the arrangement direction and a vertical direction. In FIG. 4, a yarn guiding member 52, a blow-down nozzle 53, and a guide member 97 are illustrated in cross-section.

(Yarn supplying section)

The yarn supplying section 11 includes a yarn supplying bobbin supporting section 21 ("bobbin supporting section" of the present invention) adapted to support the yarn supplying bobbin Bk, around which the yarn spun by the ring spinning machine is wound, a yarn unwinding assisting device 22, and a remaining yarn sensor 23. The yarn supplying section 11 further includes a bobbin supplying device (not illustrated) adapted to supply a new yarn supplying bobbin Bk to the yarn supplying bobbin supporting section 21. The bobbin supplying device may be a magazine type supplying device, a tray type supplying device, and the like. When all the spun yarn Y (hereinafter simply referred to as yarn Y) is pulled out from the yarn supplying bobbin Bk supported by the yarn supplying bobbin supporting section 21, the yarn supplying section 11 discharges the empty bobbin held by the yarn supplying bobbin supporting section 21, and the bobbin supplying device supplies a new yarn supplying bobbin Bk to the yarn supplying bobbin supporting section 21.
The yarn unwinding assisting device 22 lowers a regulating member 26 placed over a core tube of the yarn supplying bobbin Bk in conjunction with the unwinding of the yarn Y from the yarn supplying bobbin Bk, thus assisting the unwinding of the yarn Y from the yarn supplying bobbin Bk. The regulating member 26 makes contact with the yarn Y unwound from the yarn supplying bobbin Bk to suppress the yarn Y from greatly bulging towards a radially outer side of the yarn supplying bobbin Bk by a centrifugal force at the time of unwinding the yarn Y, thus assisting the unwinding of the yarn Y from the yarn supplying bobbin Bk. The remaining yarn sensor 23 is provided at a portion in proximity to a lower end portion of the yarn supplying bobbin Bk supported by the yarn supplying bobbin supporting section 21. The remaining yarn sensor 23 is provided to detect whether or not the yarn Y is remaining on the yarn supplying bobbin Bk.

(Package forming section)

The package forming section 12 includes a cradle 30 (not illustrated in detail) configured to be able to hold the winding bobbin Bm, and a winding drum 31 adapted to traverse the yarn Y and to rotate the winding bobbin Bm. The cradle 30 is configured to swing in a direction of approaching or separating with respect to the winding drum 31, whereby the package P is brought into contact with or separated from the winding drum 31. A spiral-shaped traverse groove 31a is formed on an outer peripheral surface of the winding drum 31, and by guiding the yarn Y along the traverse groove, the yarn Y is traversed in an axial direction (perpendicular direction in the plane of drawing of FIG. 3) of the winding bobbin Bm.
The winding drum 31 can be driven by a winding drum motor 35, and when the winding drum 31 is rotated, the winding bobbin Bm brought into contact with the winding drum 31 or the package P formed by winding the yarn Y around the winding bobbin Bm is caused to rotate accompanying the rotation of the winding drum 31, so that the yarn Y is wound around the winding bobbin Bm.

(Yarn storage section)

The yarn storage section 13 is provided to store the yarn Y unwound from the yarn supplying bobbin Bk, and includes a rotary storage drum 50, a yarn guide 51, the yarn guiding member 52, the blow-down nozzle 53, an upper limit yarn sensor 55a, a lower limit yarn sensor 55b, a lowest limit yarn sensor 55c, and the like.
The rotary storage drum 50 is a drum rotatable about an axis C tilted with respect to the vertical direction, and the yarn Y is stored on the rotary storage drum 50 by winding the yarn Y around the rotary storage drum 50, as will be described later. The rotary storage drum 50 includes a drum body 61, a flange 62, and a yarn regulating section 63.
The drum body 61 is a cylindrical member made of a metal material. In an internal space 61a of the drum body 61, a wall portion 61b is provided at a central part in the axial direction. A rotation shaft 43a of a storage drum motor 43 is attached to the wall portion 61b. When the storage drum motor 43 is driven, the rotary storage drum 50 rotates. A tapered portion 61c, which diameter becomes smaller towards the package forming section 12 side (upper right side in FIG. 4), is provided at an end on the yarn supplying section 11 side (lower left side of FIG. 4) of the drum body 61. A portion on the package forming section 12 side of the tapered portion 61c of the drum body 61 is a straight portion 61d having a constant diameter. The straight portion 61d is a portion for winding and storing the yarn Y supplied from the yarn supplying bobbin Bk.
The flange 62 is a circular member when seen from the axial direction of the rotary storage drum 50, and is inserted into the internal space 61a of the drum body 61 from the package forming section 12 side (upper right side in FIG. 4). The flange 62 projects out towards the package forming section 12 side from the internal space 61a. The flange 62 has substantially the same diameter as the internal space 61a at the portion inserted into the internal space 61a, and the portion that projects out from the internal space 61a is a tapered portion 62a in which the diameter becomes larger towards the package forming section 12.
The yarn regulating section 63 includes a base material 71, a guide rail 72, a traveler 73 ("yarn hooking section" of the present invention), a contact plate 74 ("resistance applying section" of the present invention), and a holding plate 75.
The base material 71 is a member having a circular column shape, and is fixed to a surface on the package forming section 12 side of the flange 62. The guide rail 72 is an annular member made of a metal material that surrounds the outer peripheral surface of the base material 71 in a peripheral direction. The guide rail 72 includes a bulged portion 72a, a bent portion 72b, and a rail portion 72c. The bulged portion 72a is fixed to the outer peripheral surface of the base material 71, and projects out towards the radially outer side of the rotary storage drum 50 from the outer peripheral surface of the base material 71. The bent portion 72b is formed by bending the end on the outer side of the bulged portion 72a by about 90° towards the package forming section 12. The rail portion 72c extends from the distal end of the bent portion 72b to both sides in the radial direction of the rotary storage drum 50.
The traveler 73 is a substantially C-shaped member made of a metal material, and is attached to the rail portion 72c of the guide rail 72 with a C-shaped opening 73a directed towards the yarn supplying section 11 in the axial direction of the rotary storage drum 50. Thus, the traveler 73 is movable in the peripheral direction of the rotary storage drum 50 along the outer peripheral surface of the rotary storage drum 50 by moving along the rail portion 72c of the guide rail 72. As will be described later, the yarn Y can be introduced from the opening 73a to the traveler 73.
The contact plate 74 is a circular plate-shaped body having a diameter larger than that of the base material 71, and is arranged on an upper surface of the base material 71. The contact plate 74 is made of polytetrafluoroethylene. The portion that projects farther out towards the radially outer side of the rotary storage drum 50 than the base material 71 of the contact plate 74 is brought into contact with an upper end portion of the traveler 73. Thus, when the traveler 73 is moved along the guide rail 72 (moved with respect to the rotary storage drum 50), the movement of the traveler 73 is inhibited by a frictional force generated between the contact plate 74 and the traveler 73. In other words, in the present embodiment, the frictional force between the traveler 73 and the contact plate 74 becomes a resistance that inhibits the movement of the traveler 73 with respect to the rotary storage drum 50.
The holding plate 75 is a circular plate-shaped body having a diameter slightly smaller than that of the contact plate 74, and is arranged on the upper surface of the contact plate 74. The holding plate 75 is made of nitrile butadiene rubber (NBR). The contact plate 74 and the holding plate 75 are fixed to the base material 71 with a bolt (not illustrated) passed through the contact plate 74 and the holding plate 75. The contact plate 74 is thereby pushed towards the traveler 73 by the holding plate 75. Furthermore, the degree of pushing of the contact plate 74 of the holding plate 75 is adjusted by adjusting the degree of tightening of the bolt, so that the magnitude of the frictional force generated between the moving traveler 73 and the contact plate 74 can be adjusted.
The yarn guide 51 is arranged on the package forming section 12 side of the rotary storage drum 50, and is located on the axis C of the rotary storage drum 50. The yarn Y stored on the rotary storage drum 50 is hooked to the yarn guide 51, and then pulled out towards the package forming section 12.
The yarn Y wound around the rotary storage drum 50 is hooked to the traveler 73 and the yarn guide 51 on the package forming section 12 side, and then pulled out towards the package forming section 12. When the yarn Y is pulled out from the rotary storage drum 50, the movement of the pulled-out yarn Y is regulated by the traveler 73. The pulled-out yarn Y is thereby held, and the yarn Y wound around the rotary storage drum 50 is prevented from slackening.
In the present embodiment, when the yarn Y is pulled out from the rotary storage drum 50 towards the package forming section 12, the traveler 73 is moved in the peripheral direction of the rotary storage drum 50 along the outer peripheral surface of the rotary storage drum 50 together with the pulled-out yarn Y. The yarn Y thus can be smoothly pulled out. In this case, the traveler 73 receives the resistance that inhibits the movement with respect to the rotary storage drum 50 by the frictional force generated between the traveler 73 and the contact plate 74, and thus the tension applied to the pulled-out yarn Y can be increased compared to the case where the contact plate 74 is not provided.
The yarn guiding member 52 is a tubular member extending in a straight form, and is arranged such that one end faces the tapered portion 61c of the rotary storage drum 50. The yarn Y that travelled from the yarn supplying section 11 side to the yarn guiding member 52 thus travels through an internal flow path 52a of the yarn guiding member 52 to be guided to the tapered portion 61c by the yarn guiding member 52. Therefore, when the rotary storage drum 50 is rotated, the yarn Y is first wound around the tapered portion 61c. The yarn Y wound around the tapered portion 61c is moved to the straight portion 61d along the outer peripheral surface of the tapered portion 61c and stored at the straight portion 61d.
The blow-down nozzle 53 is arranged adjacent to the yarn guiding member 52, and includes a yarn flow path 53a connected to the internal flow path 52a of the yarn guiding member 52, and a blow-down flow path 53b connected to the yarn flow path 53a and extending in a manner inclined with respect to the yarn flow path 53a. A pressure air source 82 is connected to the blow-down flow path 53b via an electromagnetic valve 81.
When the electromagnetic valve 81 is opened, the pressure air of the pressure air source 82 flows into the yarn flow path 53a through the blow-down flow path 53b, whereby an airflow from the yarn guiding member 52 towards the opposite side (guide member 97 side to be described later) is generated in the yarn flow path 53a. Thus, during the yarn joining operation, the yarn end of the yarn Y from the yarn storage section 13 located on the rotary storage drum 50 is sucked and the yarn Y from the yarn storage section 13 is pulled out.
The upper limit yarn sensor 55a is arranged to face the outer peripheral surface of the end on the package forming section 12 side in the axial direction of the drum body 61. The lower limit yarn sensor 55b is arranged to face the outer peripheral surface of a middle portion in the axial direction of the drum body 61. The lowest limit yarn sensor 55c is arranged to face the outer peripheral surface of the end on the yarn supplying section 11 side in the axial direction of the drum body 61. The yarn sensors 55a to 55c are sensors adapted to detect presence and/or absence of the yarn Y. Depending on which of the yarn sensors 55a to 55c detects the yarn Y, it is possible to know how much yarn Y is stored on the rotary storage drum 50. In the present embodiment, the yarn sensors 55a to 55c collectively correspond to a yarn storage amount detecting section according to the present invention.

(Yarn processing section)

The yarn processing section 14 is arranged between the yarn supplying section 11 and the yarn storage section 13, and includes a lower yarn blow-up device 91, a tensor (yarn tension applying device) 92, an upper yarn catching device 93, a yarn joining device 94, a lower yarn catching device 95, and a yarn clearer (yarn defect detection device) 96 arranged in this order from the lower side (yarn supplying section 11 side). The yarn processing section 14 also includes the guide member 97 in addition to the structures arranged along the vertical direction.
The lower yarn blow-up device 91 is connected to the pressure air source (not illustrated), and generates the upward airflow to blow up the yarn Y from the yarn supplying section 11 towards the yarn joining device 94 at the time of the yarn joining operation.
The tensor 92 applies a prescribed tension on the yarn Y unwound from the yarn supplying bobbin Bk. The tensor 92 may be, for example, a gate type tensor in which movable comb teeth are arranged with respect to fixed comb teeth.
The upper yarn catching device 93 is connected to a negative pressure source (not illustrated), and sucks and catches the yarn Y from the yarn storage section 13 to introduce the yarn Y from the yarn storage section 13 to the yarn joining device 94 at the time of the yarn joining operation, as will be described later.
The yarn joining device 94 joins the yarn Y from the yarn supplying section 11 and the yarn Y from the yarn storage section 13 when a yarn defect occurs, when the yarn breaks by tension, when replacing the bobbin, and the like. The yarn joining device 94 may be a mechanical type or a type that uses fluid such as compressed air.
The lower yarn catching device 95 is connected to the negative pressure source (not illustrated), and sucks and catches the yarn Y from the yarn supplying section 11 blown up by the lower yarn blow-up device 91 to introduce the yarn Y from the yarn supplying section 11 into the yarn joining device 94.
The yarn clearer 96 detects the yarn defect in the yarn spun by the ring spinning machine and the presence and/or absence of the yarn by monitoring the thickness of the yarn Y with an appropriate sensor. The yarn clearer 96 includes a cutter (not illustrated) adapted to cut the yarn Y when the yarn defect is detected.
The guide member 97 is arranged on the side (right side in FIG. 3) opposite from the yarn guiding member 52 of the blow-down nozzle 53, and vertically extends between the height at which the blow-down nozzle 53 is arranged and the height at which the upper yarn catching device 93 is arranged. A vertically-extending yarn path 97a opened at both ends is formed inside the guide member 97. The yarn path 97a is bent towards the blow-down nozzle 53 (upper left side in FIG. 3) at the upper end portion to face the yarn flow path 53a of the blow-down nozzle 53. The lower end portion of the yarn path 97a is bent towards the upper yarn catching device 93 (left side in FIG. 3) to face the upper yarn catching device 93. A slit 97b extending over the entire length of the guide member 97 is formed at the side wall of the left side (blow-down nozzle 53 and upper yarn catching device 93 side) in FIG. 3 of the guide member 97.
Thus, as described above, the airflow is generated in the yarn flow path 53a by opening the electromagnetic valve 81 during the yarn joining operation, so that when the yarn Y from the yarn storage section 13 is pulled out, the pulled-out yarn Y is introduced into the upper end portion of the yarn path 97a of the guide member 97 from the blow-down nozzle 53. The yarn Y introduced to the upper end portion of the yarn path 97a is guided to the lower end portion of the yarn path 97a along the wall surface of the yarn path 97a, and sucked by the upper yarn catching device 93, as indicated by a chain double dashed line in FIGS. 3 and 4. The yarn Y sucked by the upper yarn catching device 93 is pulled out to the outside of the guide member 97 from the slit 97b by being pulled towards the left side in FIG. 3, and introduced into the yarn joining device 94.
Next, a description will be made on the first control section 10 of the winding unit 2. The first control section 10 includes a CPU (Central Processing Unit), which is an arithmetic processing unit, a ROM (Read Only Memory) storing a control program to be executed by the CPU and data used in the control program, and a RAM (Random Access Memory) for temporarily storing the data during execution of the program, and carries out reception of a signal from the remaining yarn sensor 23, the yarn sensors 55a to 55c, the yarn clearer 96, and the like, control of the operation of the yarn unwinding assisting device 22, the winding drum motor 35, the storage drum motor 43, the electromagnetic valve 81, the yarn joining device 94, the cutter of the yarn clearer 96, and the like.
Next, a description will be made on the operation of the winding unit 2.

(First yarn hooking operation)

Prior to forming the package P in the automatic winder 1 (winding unit 2), the yarn hooking operation on the winding unit 2 is carried out. The procedure of carrying out the yarn hooking operation on the winding unit 2 is as follows. The operator first unwinds the yarn Y from the yarn supplying bobbin Bk, and sets the yarn Y on the yarn unwinding assisting device 22, the lower yarn blow-up device 91, the tensor 92, and the yarn guide 51 in this order, and fixes the yarn Y to the winding bobbin Bm. In this case, as illustrated in FIG. 6, the yarn Y pulled out towards the upper side from the tensor 92 is hooked directly to the yarn guide 51 without being passed through the yarn flow path 53a of the blow-down nozzle 53 and the internal flow path 52a of the yarn guiding member 52. The yarn Y fixed to the winding bobbin Bm is hooked to the winding bobbin Bm by the automatic doffing device 3.
As illustrated in FIG. 7, by setting the yarn Y as described above, the operator then introduces the portion, proximate to the traveler 73, of the yarn Y passed between the yarn supplying section 11 and the package forming section 12 into the traveler 73 from the opening 73a. The yarn hooking operation on the traveler 73 is thereby carried out. In this case, if the traveler 73 is at a position spaced apart from the yarn Y of the rail portion 72c, the traveler 73 is brought close to the yarn Y by being moved along the rail portion 72c and then the yarn Y is introduced into the traveler 73. Thus, in the present embodiment, the yarn Y passed between the yarn supplying section 11 and the package forming section 12 is introduced into the traveler 73 from the opening 73a of the traveler 73 to carry out the yarn hooking operation on the traveler 73, whereby the yarn hooking operation on the traveler 73 can be easily carried out.
After carrying out the yarn hooking operation on the traveler 73, the power of the winding unit 2 is turned ON and the like to cause the winding unit 2 to start the operation. As illustrated in FIG. 8, the winding unit 2 first starts the rotation of the rotary storage drum 50 by the control of the first control section 10 (S101). The yarn Y is thereby unwound from the yarn supplying bobbin Bk. Furthermore, as illustrated in FIG. 9, the traveler 73 is rotated in conjunction with the rotation of the rotary storage drum 50, and the unwound yarn Y is wound around the outer peripheral surface of the rotary storage drum 50, whereby the yarn hooking operation on the rotary storage drum 50 is carried out.
As opposed to the present embodiment, if the contact plate 74 is not provided and the resistance that inhibits the movement of the traveler 73 with respect to the rotary storage drum 50 is too small, the traveler 73 does not rotate even if the rotary storage drum 50 is rotated, and the yarn Y unwound from the yarn supplying bobbin Bk may not be wound around the outer peripheral surface of the rotary storage drum 50 (yarn hooking operation may not be carried out on the rotary storage drum 50). On the contrary, in the present embodiment, the contact plate 74 is provided, so that the resistance that inhibits the movement with respect to the rotary storage drum 50 is applied to the traveler 73. Therefore, as described above, the traveler 73 rotates in conjunction with the rotation of the rotary storage drum 50, and the yarn hooking operation can be carried out on the rotary storage drum 50.
This state is maintained until the yarn hooking operation on the rotary storage drum 50 is completed (S102: NO), and when the yarn hooking operation on the rotary storage drum 50 is completed (S102: YES), the rotation of the winding drum 31 is started (S103). Thus, in the winding unit 2, a storing operation in which the yarn Y of the yarn supplying bobbin Bk is unwound and the unwound yarn Y is stored by being wound around the outer peripheral surface of the rotary storage drum 50 by the rotation of the rotary storage drum 50, and a package forming operation in which the yarn Y stored on the rotary storage drum 50 is pulled out and the pulled-out yarn Y is wound around the winding bobbin Bm while being traversed by the rotation of the winding bobbin Bm that rotates in conjunction with the rotation of the winding drum 31 are carried out.
In the present embodiment, by rotating the rotary storage drum 50 as described above, the yarn Y of the yarn supplying bobbin Bk is unwound, and the unwound yarn Y can be stored by being wound around the rotary storage drum 50. Therefore, in the present embodiment, it is not necessary to provide a mechanism for unwinding the yarn Y from the yarn supplying bobbin Bk and the like separately from the rotary storage drum 50.
While the yarn defect is not detected (S104 : NO), the yarn is not broken by tension (S105: NO), and the yarn Y is remaining on the yarn supplying bobbin Bk (S106: NO), the normal winding in which both the storing operation and the package forming operation are carried out is continued. When the yarn defect is detected (S104: YES), a yarn defect removing operation, to be described later, is carried out (S107), and the process returns to S104. When the yarn breakage is detected (S105: YES), a yarn breakage recovering operation, to be described later, is carried out (S108), and the process returns to S104. When there is no remaining yarn Y on the yarn supplying bobbin Bk (S106: YES), a bobbin replacing operation, to be described later, is carried out (S109), and the process returns to S104.
In the present embodiment, when the yarn defect is detected by the yarn clearer 96, determination is made that the yarn defect is detected in S104. When the yarn Y is not detected by the yarn clearer 96 and the detection is made that there is remaining yarn Y on the yarn supplying bobbin Bk by the remaining yarn sensor 23, determination is made that the yarn breakage occurred by tension in S105. When the yarn Y is not detected by the yarn clearer 96 and the detection is made that there is no more remaining yarn Y on the yarn supplying bobbin Bk by the remaining yarn sensor 23, determination is made that there is no remaining yarn on the yarn supplying bobbin Bk in S106.

(Yarn defect removing operation)

Next, a description will be made on the yarn defect removing operation of S107. As illustrated in FIG. 10A, in the yarn defect removing operation, the yarn Y is first cut by the cutter of the yarn clearer 96 (S201). Then, the rotation (storing operation) of the rotary storage drum 50 is stopped (S202). Thus, the yarn end of the yarn Y from the yarn storage section 13 (package forming section 12) of the cut yarn Y is located on the outer peripheral surface of the rotary storage drum 50 or in proximity thereto, and the yarn end of the yarn Y from the yarn supplying section 11 is drooped towards the lower side from the lower yarn blow-up device 91.
Next, the yarn Y from the yarn storage section 13 is pulled out towards the yarn supplying section 11 (S203). More specifically, in S203, the rotary storage drum 50 is first rotated in a direction opposite to that of the storing operation, and the electromagnetic valve 81 is opened to generate the airflow in the yarn flow path 53a from the blow-down flow path 53b. The yarn end of the yarn Y from the yarn storage section 13 located on the outer peripheral surface of the rotary storage drum 50 is then sucked from the yarn guiding member 52, and the sucked yarn end of the yarn Y from the yarn storage section 13 is pulled out to the lower end portion of the yarn path 97a through the internal flow path 52a of the yarn guiding member 52, the yarn flow path 53a of the blow-down nozzle 53, and the yarn path 97a of the guide member 97, as described above.
In the present embodiment, the yarn Y is not passed through the yarn flow path 53a of the blow-down nozzle 53 and the internal flow path 52a of the yarn guiding member 52 in the first yarn hooking operation, but the yarn Y is passed through these passages according to the operation of the S203.
Then, the yarn Y from the yarn storage section 13 pulled out to the lower end portion of the yarn path 97a in S203 is introduced to the yarn joining device 94 by being sucked with the upper yarn catching device 93, as described above, (S204). The yarn Y from the yarn supplying section 11 is then blown up by the lower yarn blow-up device 91, and the blown-up yarn Y is sucked and caught by the lower yarn catching device 95 to introduce the yarn Y from the yarn supplying section 11 to the yarn joining device 94 (S205). Note that S205 may be carried out after S202, and before S203, S204 or in parallel with S203 and S204.
The yarn joining device 94 then carries out the yarn joining operation of the introduced yarn Y from the yarn supplying section 11 and the yarn Y from the yarn storage section 13 (S206). After the completion of the yarn joining operation, the rotation (storing operation) of the rotary storage drum 50 is resumed (S207), and the process returns to S104.

(Yarn breakage recovering operation)

Next, a description will be made on the yarn breakage recovering operation of S108. As illustrated in FIG. 10B, in the yarn breakage recovering operation, the rotation (storing operation) of the rotary storage drum 50 is first stopped (S301). Then, the yarn Y from the yarn supplying section 11 and the yarn Y from the yarn storage section 13 are respectively introduced to the yarn joining device 94 (S302). In S302, the yarn Y from the yarn supplying section 11 and the yarn Y from the yarn storage section 13 are introduced to the yarn joining device 94 according to the procedure similar to S204 and S205 described above, for example. Furthermore, at this time, depending on the position where the yarn breakage occurred, the yarn Y from the yarn storage section 13 is pulled out similarly to S203, and the pulled-out yarn Y from the yarn storage section 13 is introduced to the yarn joining device. The yarn joining device 94 then executes the yarn joining operation of the introduced yarn Y from the yarn supplying section 11 and the yarn Y from the yarn storage section 13 (S303). After the completion of the yarn joining operation, the rotation (storing operation) of the rotary storage drum 50 is resumed (S304), and the process returns to S104.

(Bobbin replacing operation)

Next, a description will be made on the bobbin replacing operation of S109. As illustrated in FIG. 10C, in the bobbin replacing operation, the rotation (storing operation) of the rotary storage drum 50 is first stopped (S401). Then, the yarn supplying bobbin Bk, with no yarn remaining thereon, is discharged from the yarn supplying bobbin supporting section 21, and a new yarn supplying bobbin Bk is supplied from the bobbin supplying device to the yarn supplying bobbin supporting section 21 (S402). Then, the yarn Y from the yarn supplying section 11 and the yarn Y from the yarn storage section 13 are respectively introduced to the yarn joining device 94 (S403). In S403, the yarn Y from the yarn supplying section 11 and the yarn Y from the yarn storage section 13 are introduced to the yarn joining device 94 according to the procedure similar to S204 and S205 described above, for example. In the bobbin replacing operation, the introduction of the yarn Y from the yarn storage section 13 to the yarn joining device 94 in S403 may be carried out before S402. The yarn joining device 94 then executes the yarn joining operation of the introduced yarn Y from the yarn supplying section 11 and the yarn Y from the yarn storage section 13 (S404). After the yarn joining operation is completed, the rotation (storing operation) of the rotary storage drum 50 is resumed (S405), and the process returns to S104.

(Rotation speed of rotary storage drum during normal winding)

Next, a description will be made on the rotation speed of the rotary storage drum 50 during the normal winding in which both the storing operation and the package forming operation are carried out using a flowchart of FIG. 11. The flow of FIG. 11 is started when the normal winding is started, that is, when both the storing operation and the package forming operation are started. During the normal winding, when the amount of yarn Y stored on the rotary storage drum 50 is small and the yarn Y is not detected by the upper limit yarn sensor 55a (S501: NO), the rotary storage drum 50 is rotated at a predetermined rotation speed Vc1 (S502). The rotation speed Vc1 is a rotation speed at which the unwinding speed of the yarn Y from the yarn supplying bobbin Bk becomes faster than the pull-out speed of the yarn Y from the rotary storage drum 50 when the winding drum 31 is rotated at a rotation speed Vm1, as will be described later. Therefore, while the rotary storage drum 50 is being rotated at the rotation speed Vc1, the amount of yarn Y stored on the rotary storage drum 50 increases.
When the yarn Y is detected by the upper limit yarn sensor 55a (S501: YES), the rotary storage drum 50 is rotated at a rotation speed Vc2 lower than the rotation speed Vc1 (S503). The rotation speed Vc2 is a rotation speed at which the unwinding speed of the yarn Y from the yarn supplying bobbin Bk becomes lower than the pull-out speed of the yarn Y from the rotary storage drum 50 when the winding drum 31 is rotated at the rotation speed Vm1, as will be described later. Therefore, while the rotary storage drum 50 is being rotated at the rotation speed Vc2, the amount of yarn Y stored on the rotary storage drum 50 is reduced.
While the normal winding is continued (S504: YES), the rotation speed of the rotary storage drum 50 is controlled as in S501 to S503. Thus, the amount of yarn Y stored on the rotary storage drum 50 is maintained at an amount close to the storage amount corresponding to the upper limit yarn sensor 55a. When the normal winding is not continued, such as when the rotation of the rotary storage drum 50 is stopped as in S202, S301, S401, and the like, the flow of FIG. 11 is terminated.

(Rotation speed of winding drum)

Next, a description will be made on the rotation speed of the winding drum 31 using a flowchart of FIG. 12. The flow of FIG. 12 is started at the start of the package forming operation.
At the start of the package forming operation, the winding drum 31 is rotated at the predetermined rotation speed Vm1 (S601). While the storing operation is being carried out (while the rotary storage drum 50 is rotating) (S602: NO), the rotation speed of the winding drum 31 is maintained at Vm1.
When the rotation (storing operation) of the rotary storage drum 50 is stopped (S602: YES) in S201, S301, S401, described above, the rotation speed of the winding drum 31 is maintained at Vm1 (S604) when the yarn Y is detected by the lower limit yarn sensor 55b (S603: YES). When the yarn Y is not detected by the lower limit yarn sensor 55b (S603: NO) but the yarn Y is detected by the lowest limit yarn sensor 55c (S605: YES), the rotation speed of the winding drum 31 is decelerated to Vm2, which is lower than Vm1 (S606). When the yarn Y is not detected even with the lowest limit yarn sensor 55c (S605: NO), the rotation of the winding drum 31, that is, the package forming operation is stopped (S607). Thus, in the present embodiment, while the storing operation is stopped, the rotation speed of the winding drum 31 (pull-out speed of the yarn Y from the rotary storage drum 50 in the package forming operation) is reduced as the amount of yarn Y stored on the rotary storage drum 50 becomes smaller.
Until the storing operation is resumed in S207, S305, and S404 (S608: NO), the rotation speed of the winding drum 31 is controlled as described in S603 to S607, and when the storing operation is resumed in S207, S305, S404 (S608: YES), the process returns to S601.
In the present embodiment, the yarn Y unwound from the yarn supplying bobbin Bk is stored on the rotary storage drum 50, and hence the package forming operation can be continued even when the storing operation is stopped in S201, S301, and S401 as described above. However, since the yarn Y is not supplied to the rotary storage drum 50 while the storing operation is stopped, the amount of yarn Y stored on the rotary storage drum 50 is reduced by continuing the package forming operation.
On the contrary, in the present embodiment, the package P can be efficiently formed by rotating the winding drum 31 at the rotation speed Vm1, which is the same as that during the normal winding, when the amount of yarn Y stored on the rotary storage drum 50 is large (when the amount of yarn Y is greater than or equal to the storage amount corresponding to the lower limit yarn sensor 55b). When the amount of yarn Y stored on the rotary storage drum 50 becomes small (when the amount of yarn Y is smaller than the storage amount corresponding to the lower limit yarn sensor 55b), the rotation speed of the winding drum 31 is set to Vm2, which is lower than Vm1. The reduction of the yarn Y stored on the rotary storage drum 50 can be suppressed, and the time during which the package forming operation is continued can be increased. As a result, the time that can be used for the yarn joining operation and the like can be increased. Furthermore, when the amount of yarn Y stored on the rotary storage drum 50 is further reduced and is hardly stored (when the amount of yarn Y is smaller than the storage amount corresponding to the lowest limit yarn sensor 55c), the rotation (package forming operation) of the winding drum 31 is stopped. Thus, the case where there is completely no yarn Y on the rotary storage drum 50 can be prevented.
Alternative embodiments in which various changes are made on the present embodiment will now be described.
In the above-described embodiment, the yarn Y is not passed through the yarn flow path 53a of the blow-down nozzle 53 and the internal flow path 52a of the yarn guiding member 52 in the first yarn hooking operation, but the present invention is not limited thereto. The yarn Y may be passed through the yarn flow path 53a and the internal flow path 52a in the first yarn hooking operation.
In the above-described embodiment, as illustrated in FIG. 6, the operator hooks the yarn Y passed between the yarn supplying section 11 and the package forming section 12 on the traveler 73 as illustrated in FIG. 7, and then starts the rotation of the rotary storage drum 50, but the present invention is not limited thereto. In one alternative embodiment (first alternative embodiment), as illustrated in FIG. 13, the rotary storage drum 50 is arranged at a position where a movement path (one portion of yarn regulating section 63) along the rail portion 72c of the traveler 73 intersects the yarn Y passed between the yarn supplying section 11 and the package forming section 12 similarly to FIG. 6 (located on a yarn path of the yarn Y passed between the yarn supplying section 11 and the package forming section 12).
In this case, the yarn hooking operation on the traveler 73 by the operator is not carried out and the rotation of the rotary storage drum 50 is started. Then, a portion that overlaps the movement path of the traveler 73 of the yarn Y passed between the yarn supplying section 11 and the package forming section 12 is introduced from the opening 73a to the traveler 73, so that the yarn hooking operation on the traveler 73 is automatically carried out. In this case, the traveler 73 functions as a yarn hooking section. Thereafter, the rotary storage drum 50 is further rotated, so that the yarn hooking operation on the rotary storage drum 50 is carried out, similarly to the above-described embodiment.
In this case, compared to the above-described embodiment, the degree of freedom in the arrangement of the rotary storage drum 50 is lowered but the operator does not need to manually carry out the yarn hooking operation on the traveler 73, and thus the burden of the operator in the first yarn hooking operation can be reduced.
In the above-described embodiment, the resistance that inhibits the movement with respect to the rotary storage drum 50 is applied to the traveler 73 by bringing the contact plate 74 into contact with the traveler 73, but the present invention is not limited thereto.
In another alternative embodiment (second alternative embodiment), as illustrated in FIG. 14, a rubber magnet plate 101 ("resistance applying section" in the present invention) is arranged in place of the contact plate 74 at a position where the contact plate 74 (see FIG. 5B) is arranged in the above-described embodiment. In this case, the magnetic force generated between the traveler 73 and the rubber magnet plate 101 becomes the resistance that inhibits the movement of the traveler 73 with respect to the rotary storage drum 50. Furthermore, in this case, the magnetic force generated between the traveler 73 and the rubber magnet plate 101 attracts the traveler 73 towards the package forming section 12.
In another alternative embodiment (third alternative embodiment), as illustrated in FIG. 15A, an annular magnet 106 ("resistance applying section" in the present invention) is arranged on the bulged portion 72a of the guide rail 72 instead of providing the contact plate 74 (see FIG. 5B). The magnet 106 is, for example, a neodymium magnet. In this case, the magnetic force generated between the traveler 73 and the magnet 106 becomes the resistance that inhibits the movement of the traveler 73 with respect to the rotary storage drum 50. In this case, the magnetic force of the traveler 73 and the magnet 106 attracts the traveler 73 towards the yarn supplying section 11.
In the third alternative embodiment, a tapered portion 62a of the flange 62 is formed longer in the axial direction of the rotary storage drum 50 than the above-described embodiment, and extends towards the package forming section 12 side farther than in the case of the above-described embodiment. Thus, the yarn Y once hooked to the traveler 73 is less likely to fall off from the traveler 73. The tapered portion 62a of the flange 62 in the third alternative embodiment is not limited to being long in the axial direction of the rotary storage drum 50 as described above, and may be similar to that in the above-described embodiment, as illustrated in FIG. 15B (fourth alternative embodiment).
In another alternative embodiment (fifth alternative embodiment), as illustrated in FIG. 16, a magnet 111 (resistance applying section) is provided at an end on an inner side in the radial direction of the rotary storage drum 50 of the traveler 73. In this case, the magnetic force generated between the magnet 111 provided on the traveler 73 and the base material 71 made of a ferromagnetic material facing the magnet 111 becomes the resistance that inhibits the movement of the traveler 73 with respect to the rotary storage drum 50. In the present embodiment, the base material 71 corresponds to a ferromagnetic portion according to the present invention.
The magnet 111 may be provided at a portion different from the fifth alternative embodiment that faces any portion made of a ferromagnetic metal material of the rotary storage drum 50 of the traveler 73. In this case, the portion facing the magnet 111 of the rotary storage drum 50 corresponds to the ferromagnetic metal portion of the present invention.
In another alternative embodiment (sixth alternative embodiment), as illustrated in FIGS. 17A and 17B, the yarn regulating section 63 includes a resistance applying brush 116 ("resistance applying section" in the present invention) in place of the contact plate 74 and the holding plate 75. The resistance applying brush 116 extends over the entire periphery of the outer peripheral surface at the upper end portion of the outer peripheral surface of the base material 71, and makes contact with the traveler 73. In this case, when the traveler 73 is moved along the guide rail 72, the resistance that inhibits the movement with respect to the rotary storage drum 50 is applied to the traveler 73 by bringing the traveler 73 into contact with the resistance applying brush 116.
Furthermore, the configuration of applying the resistance that inhibits the movement with respect to the rotary storage drum 50 on the traveler 73 such as the contact plate 74, the rubber magnet plate 101, the magnets 106, 111, and the resistance applying brush 116 may not be provided. For example, if the sliding resistance between the traveler 73 and the guide rail 72 is large to a certain extent, the tension to be applied to the yarn Y pulled out towards the package forming section 12 from the rotary storage drum 50 can be increased even if a configuration for applying the resistance that inhibits the movement with respect to the rotary storage drum 50 on the traveler 73 is not separately provided. Since the traveler 73 moves in conjunction with the rotation of the rotary storage drum 50 during the first yarn hooking operation the yarn hooking operation can be carried out on the rotary storage drum 50.
The configuration of the guide rail and the traveler is not limited to that described in the embodiment. In another alternative embodiment (seventh alternative embodiment), as illustrated in FIGS. 18A and 18B, a guide rail 121 is arranged in place of the guide rail 72 and a traveler 122 is arranged in place of the traveler 73 in the sixth alternative embodiment. The guide rail 121 includes a bulged portion 121a bulged out towards the radially outer side of the rotary storage drum 50 from the outer peripheral surface of the base material 71, and a rail portion 121b extending from the distal end of the bulged portion 121a to both upper and lower sides. The traveler 122 is attached to the rail portion 121b such that an opening 122a is on the inner side in the radial direction of the rotary storage drum 50.
In this case as well, similarly to the above-described embodiment, the movement of the yarn Y pulled out from the rotary storage drum 50 towards the package forming section 12 is regulated by the traveler 122. Thus, the pulled-out yarn Y is held, and the yarn Y wound around the rotary storage drum 50 is prevented from slackening.
Furthermore, in this case as well, the yarn Y passed between the yarn supplying section 11 and the package forming section 12 is introduced to the traveler 122 from the opening 122a, so that the yarn hooking operation can be carried out on the traveler 122. In this case, the traveler 122 functions as the yarn hooking section. Moreover, when the rotary storage drum 50 is rotated with the yarn hooked to the traveler 122, the yarn can be hooked to the rotary storage drum 50.
In the seventh alternative embodiment, similarly to the sixth alterative embodiment, the resistance that inhibits the movement with respect to the rotary storage drum 50 is applied to the traveler 122 by the resistance applying brush 116, but also in the seventh alternative embodiment, the resistance that inhibits the movement with respect to the rotary storage drum 50 may be applied to the traveler 122 by the contact plate 74, the rubber magnet plate 101, and the magnets 106, 111.
In the above-described embodiment and the first to seventh alternative embodiments, the travelers 73, 122 are substantially C-shaped members having openings 73a, 122a, and the yarn hooking operation can be carried out on the travelers 73, 122 by introducing the yarn Y passed between the yarn supplying section 11 and the package forming section 12 from the openings 73a, 122a. However, the present invention is not limited thereto. The travelers 73, 122 may be configured such that the yarn Y passed between the yarn supplying section 11 and the package forming section 12 can be hooked with a configuration different from the above.
Furthermore, the yarn regulating section is not limited to one including the traveler and the guide rail for guiding the traveler. In another alternative embodiment (eighth alternative embodiment), as illustrated in FIGS. 20A and 20B, a yarn regulating section 130 includes a base material 131 and a flyer 132 ("rod shaped member" in the present invention). The base material 131 is a substantially circular column shaped member, and is arranged at a central part of the upper surface of the flange 62. The flyer 132 is made of a metal material and the like, and includes two portions 132a, 132b. The portion 132a is arranged on an axis C of the rotary storage drum 50, extends parallel to the axial direction of the rotary storage drum 50, and is rotatably supported by the base material 131. The portion 132b extends to the outer side of the flange 62 in the radial direction of the rotary storage drum 50 from the distal end of the portion 132a.
An annular rubber magnet plate 133 is provided at an end on an outer side in the radial direction of a surface on the package forming section 12 side in the axial direction of the flange 62, and the rubber magnet plate 133 faces the portion 132b of the flyer 132. Thus, in the eighth alternative embodiment, the magnetic force generated between the flyer 132 made of a ferromagnetic material and the rubber magnet plate 133 becomes a resistance that inhibits the rotation of the flyer 132 with respect to the rotary storage drum 50. In the eighth alternative embodiment, the yarn Y pulled out from the rotary storage drum 50 towards the package forming section 12 is hooked to the distal end ("yarn hooking section" in the present invention) of the portion 132b of the flyer 132, and then hooked to the yarn guide 51 and pulled out towards the package forming section 12.
In this case, the movement of the yarn Y pulled out from the rotary storage drum 50 towards the package forming section 12 is regulated by the flyer 132. Thus, the pulled-out yarn Y is held, and the yarn Y wound around the rotary storage drum 50 is prevented from slackening.
In this case, in conjunction with the pulled-out yarn Y moving in the peripheral direction of the rotary storage drum 50 along the outer peripheral surface of the rotary storage drum 50, the flyer 132 is rotated and the distal end of the portion 132b is moved in the peripheral direction of the rotary storage drum 50 along the outer peripheral surface of the rotary storage drum 50. The yarn Y thus can be smoothly pulled out. In this case, the flyer 132 receives the resistance that inhibits the rotation with respect to the rotary storage drum 50 by the magnetic force generated between the flyer 132 and the rubber magnet plate 133, and thus the tension to be applied to the yarn Y to be pulled out can be increased compared to the case where the rubber magnet plate 133 is not provided.
Furthermore, in this case, the yarn Y passed between the yarn supplying section 11 and the package forming section 12 is hooked to the portion 132b of the flyer 132 in the first yarn hooking operation. The yarn Y is thereby hooked to the flyer 132. When the rotary storage drum 50 is rotated under this state, the flyer 132 rotates in conjunction with the rotation of the rotary storage drum 50, and the yarn Y is wound around the rotary storage drum 50. The yarn hooking operation on the rotary storage drum 50 is thereby carried out. In this case, as described above, the resistance that inhibits the rotation with respect to the rotary storage drum 50 is applied to the flyer 132 by the magnetic force generated between the flyer 132 and the rubber magnet plate 133, so that the flyer 132 reliably rotates in conjunction with the rotation of the rotary storage drum 50. The yarn hooking operation on the rotary storage drum 50 thus can be reliably carried out.
In another alternative embodiment (ninth alternative embodiment), as illustrated in FIGS. 21A and 21B, in place of the rubber magnet plate 133 in the eighth alternative embodiment, a resistance applying brush 136 ("first resistance applying brush" in the present invention) that makes contact with the portion 132b of the flyer 132 is provided on an end face on the package forming section 12 side in the axial direction of the flange 62. In this case, the force which the rotating flyer 132 receives from the resistance applying brush 136 becomes the resistance that inhibits the rotation of the flyer 132 with respect to the rotary storage drum 50.
In another alternative embodiment (tenth alternative embodiment), as illustrated in FIGS. 22A and 22B, in place of the rubber magnet plate 133 in the eighth alternative embodiment, a resistance applying brush 141 ("second resistance applying brush" in the present invention) that makes contact with the upper surface of the flange 62 is provided on the portion 132b of the flyer 132. In this case, the force which the resistance applying brush 141 provided in the rotating flyer 132 receives from the flange 62 becomes the resistance that inhibits the movement of the flyer 132 with respect to the rotary storage drum 50.
In the eighth to tenth alternative embodiments, for example, the portion for preventing the hooked yarn Y from falling off may be provided at the distal end of the portion 132b of the flyer 132, such as the portion where the distal end of the portion 132b of the flyer 132 is bent towards the yarn supplying section 11 in the axial direction of the rotary storage drum 50.
In the above examples, the yarn regulating section includes the traveler that moves in the peripheral direction of the rotary storage drum 50 along the outer peripheral surface of the rotary storage drum 50 by moving along the guide rail, or the flyer whose distal end moves in the peripheral direction of the rotary storage drum 50 along the outer peripheral surface of the rotary storage drum 50 by rotating about the center axis of the rotary storage drum, but the present invention is not limited thereto. The yarn regulating section may have a different configuration of including a yarn hooking section configured to be movable in the peripheral direction of the rotary storage drum 50 along the outer peripheral surface of the rotary storage drum 50 and configured to be able to hook the yarn Y passed between the yarn supplying section 11 and the package forming section 12.
Furthermore, the yarn regulating section is not limited to including the yarn hooking section configured to be movable in the peripheral direction of the rotary storage drum 50 along the outer peripheral surface of the rotary storage drum 50. In another alternative embodiment (twelfth alternative embodiment), as illustrated in FIGS. 23A and 23B, a yarn regulating section 150 includes a ring member 151. The ring member 151 is a circular ring shaped member made of CFRP (Carbon Fiber Reinforced Plastic) and the like. The ring member 151 is spirally wound over a range slightly shorter than two turns ("range longer than one turn" in the present invention) in the peripheral direction of the rotary storage drum 150 around an end on the package forming section 12 side in the axial direction of the straight portion 61d of the drum body 61. Both ends in the peripheral direction of the ring member 151 are respectively bent so as to be curved towards the radially outer side of the rotary storage drum 50. In the twelfth alternative embodiment, the ring member 151 is prevented from falling off from the rotary storage drum 150 by the tapered portion 62a of the flange 62. The yarn Y pulled out from the rotary storage drum 50 towards the package forming section 12 is passed between the ring member 151 and the rotary storage drum 150, and reaches the yarn guide 51.
In this case, the yarn Y pulled out from the rotary storage drum 50 towards the package forming section 12 makes contact with the ring member 151, and the movement of the yarn Y is thereby regulated. The pulled-out yarn Y is thereby held, and the yarn Y wound around the rotary storage drum 50 is prevented from slackening.
In this case, the yarn Y passed between the yarn supplying section 11 and the package forming section 12 in the first yarn hooking operation is inserted to a gap 151a ("yarn path" in the present invention) between the portions overlapped with each other in the spirally-wound ring member 151, from one end of the ring member 151, and the inserted yarn Y is moved along the peripheral direction of the ring member 151, as indicated by an arrow A in FIGS. 23A and 23B. The yarn Y is then moved in the order of Y1, Y2, Y3 indicated by a chain double dashed line in FIG. 23A, and is introduced to the inner side of the ring member 151 (between ring member 151 and rotary storage drum 150). The yarn hooking operation on the ring member 151 is thereby carried out. When the rotary storage drum 150 is rotated under this state, the ring member 151 integrally rotates with the rotary storage drum 150, and the yarn Y is wound around the rotary storage drum 150 (yarn hooking operation on the rotary storage drum 150 is carried out).
The ring member is not limited to that described in the eleventh alternative embodiment. For example, the ring member may be spirally wound across a range longer than one turn in the peripheral direction of the rotary storage drum 50, as opposed to the eleventh alternative embodiment. Furthermore, the ring member is not limited to being spirally wound over the range longer than one turn in the peripheral direction of the rotary storage drum 50. The ring member may have a different structure that includes a yarn passage for introducing the yarn Y passed between the yarn supplying section 11 and the package forming section 12 from a region on an outer side to a region on an inner side of the ring member in the radial direction of the rotary storage drum 50.
In another alternative embodiment (twelfth alternative embodiment), as illustrated in FIG. 24 and FIGS. 25A and 25B, a yarn regulating section 155 includes a yarn regulating brush 156 in place of the guide rail 72, the traveler 73, the contact plate 74, and the holding plate 75 (see FIGS. 5A and 5B) in the yarn regulating section 63 according to the above-described embodiment. The yarn regulating brush 156 is provided on the outer peripheral surface of the base material 71 across the entire periphery. The yarn Y pulled out from the rotary storage drum 50 towards the package forming section 12 is passed through a region where the yarn regulating brush 156 is arranged to reach the yarn guide 51.
In this case, the movement of the yarn Y pulled out from the rotary storage drum 50 towards the package forming section 12 is regulated by being caught at bristles of the yarn regulating brush 156. The pulled-out yarn Y is thereby held, and the yarn Y wound around the rotary storage drum 50 is prevented from slackening.
In this case, the yarn Y passed between the yarn supplying section 11 and the package forming section 12 is brought closer to the yarn regulating brush 156 during the yarn hooking operation. The yarn Y thereby gets caught at the bristles of the yarn regulating brush 156, and the yarn Y is hooked to the yarn regulating brush 156. When the rotary storage drum 50 is rotated under this state, the yarn regulating brush 156, to which the yarn Y is caught, integrally rotates with the rotary storage drum 50, and the yarn Y is wound around the rotary storage drum 50 (yarn is hooked to the rotary storage drum 50).
In the above-described embodiment, while the package forming operation is stopped, the rotation speed of the winding drum 31 is assumed as Vm1 when the storage amount of the yarn Y on the rotary storage drum 50 is greater than or equal to an amount corresponding to the lower limit yarn sensor 55b, and the rotation speed of the winding drum 31 is assumed as Vm2, which is lower than Vm1, when the storage amount of the yarn Y on the rotary storage drum 50 is smaller than the amount corresponding to the lower limit yarn sensor 55b and greater than or equal to an amount corresponding to the lowest limit yarn sensor 55c, but the present invention is not limited thereto. For example, the storage amount of the yarn Y in the rotary storage drum 50 may be more finely detected, and the rotation speed of the winding drum 31 may be gradually lowered as the storage amount of the yarn in the rotary storage drum 50 becomes smaller. Alternatively, while the package forming operation is stopped, the winding drum 31 may be rotated at a constant rotation speed regardless of the storage amount of the yarn Y in the rotary storage drum 50.
In the above-described embodiment, the rotation speed of the rotary storage drum 50 is controlled as illustrated in the flowchart of FIG. 11, and the rotation speed of the winding drum 31 is controlled as illustrated in the flowchart of FIG. 12, but the present invention is not limited thereto. One of the control of the rotation speed of the rotary storage drum 50 or the control of the rotation speed of the winding drum 31 may be the control different from the above-described embodiment.
Furthermore, in the above-described embodiment, the yarn Y of the yarn supplying bobbin Bk is unwound and the unwound yarn Y is wound around the rotary storage drum 50 by rotating the rotary storage drum 50, but the present invention is not limited thereto. For example, a device for unwinding the yarn Y of the yarn supplying bobbin Bk may be provided separately from the rotary storage drum 50, and the rotary storage drum 50 may wind and store the yarn Y unwound by such a device by rotating.

Claims

A yarn winding device (2) comprising:
a yarn supplying section (11) including a bobbin supporting section (21) adapted to support a yarn supplying bobbin (Bk) around which a yarn is wound;

a yarn storage section (13) adapted to store the yarn from the yarn supplying bobbin (Bk);

a package forming section (12) adapted to pull out the yarn stored in the yarn storage section (13) and wind the yarn to form a package;

a yarn defect detection device (96) adapted to detect a yarn defect in the yarn spun by the ring spinning machine and cut the yarn to remove the yarn defect when the yarn defect is detected; and

a yarn joining device (94) provided between the yarn supplying section (11) and the yarn storage section (13) and adapted to join the yarn from the yarn supplying section (11) and the yarn from the yarn storage section (13) when the yarn is cut by the yarn defect detection device (96) or when the yarn of the yarn supplying bobbin (Bk) runs out and a new yarn supplying bobbin (Bk) is supplied to the yarn supplying section (11),

wherein the yarn storage section (13) includes a rotary storage drum (50) adapted to wind and store the yarn from the yarn supplying bobbin (Bk) by rotating,

the rotary storage drum (50) includes

a drum body (61) adapted to store the yarn by winding the yarn, characterized by

a yarn regulating section (63, 130, 150, 155) provided at an end on the package forming section (12) side in an axial direction of the drum body (61) and adapted to regulate movement of the pulled-out yarn when the yarn is pulled out from the drum body (61) towards the package forming section (12), and

the yarn regulating section (63, 130, 150, 155) is configured to hook the yarn passed between the yarn supplying section (11) and the package forming section (12) and to wind the yarn around the rotary storage drum (50) when the rotary storage drum (50) is rotated in the yarn hooked state.
The yarn winding device (2) according to claim 1, characterized in that the rotary storage drum (50) unwinds the yarn from the yarn supplying bobbin (Bk) and stores the yarn by rotating.
The yarn winding device (2) according to claim 1 or 2, characterized in that
a portion of the yarn regulating section (63, 130, 150, 155) is located on a yarn path of the yarn passed between the yarn supplying section (11) and the package forming section (12), and
the yarn is hooked to the yarn regulating section (63, 130, 150, 155) by rotating the rotary storage drum (50) with the yarn passed between the yarn supplying section (11) and the package forming section (12).
The yarn winding device (2) according to any one of claims 1 to 3, characterized by further comprising:
a yarn storage amount detecting section (55a to 55c) adapted to detect a storage amount of the yarn stored on the rotary storage drum (50); and

a first control section (10) adapted to control the device,

wherein the first control section (10) causes the package forming section (12) to continue a package forming operation of pulling out and winding the yarn from the yarn storage section (13) and causes the package forming section (12) to reduce a pull-out speed of the yarn from the yarn storage section (13) during the package forming operation as the storage amount of the yarn detected by the yarn storage amount detecting section (55a to 55c) becomes smaller when causing the yarn joining device (94) to carry out a yarn joining operation.
The yarn winding device (2) according to any one of claims 1 to 4, characterized in that the yarn regulating section (63, 130) includes a yarn hooking section (73, 122, 132b) configured to be movable in a peripheral direction of the rotary storage drum (50) along an outer peripheral surface of the rotary storage drum (50), and configured to hook the yarn passed between the yarn supplying section (11) and the package forming section (12).
The yarn winding device (2) according to claim 5, characterized in that the yarn regulating section (63) includes
an annular guide rail (72, 121) that surrounds the outer peripheral surface of the rotary storage drum (50) in the peripheral direction, and
a traveler (73, 122) serving as the yarn hooking section configured to be movable along the guide rail (72, 121) and configured to hook the yarn passed between the yarn supplying section (11) and the package forming section (12).
The yarn winding device (2) according to claim 6, characterized in that the traveler (73, 122) includes
an opening (73a, 122a) through which the yarn passed between the yarn supplying section (11) and the package forming section (12) is introduced, and
the yarn hooking operation is carried out by introducing the yarn from the opening (73a, 122a).
The yarn winding device (2) according to claim 6 or 7, characterized in that the yarn regulating section (63) further includes a resistance applying section (74, 101, 106, 111) adapted to apply a resistance that inhibits the movement with respect to the rotary storage drum (50) on the traveler (73, 122).
The yarn winding device (2) according to claim 8, characterized in that the resistance applying section includes a contact plate (74) which is provided on the package forming section (12) side of the traveler (73) in the axial direction of the rotary storage drum (50) and adapted to make contact with the traveler (73) .
The yarn winding device (2) according to claim 8, characterized in that the traveler (73) is made of a metal material, and the resistance applying section includes a magnet (101, 106, 111) provided on the rotary storage drum (50).
The yarn winding device (2) according to claim 10, characterized in that the magnet (106) is provided on the guide rail (72).
The yarn winding device (2) according to claim 8, characterized in that the rotary storage drum (50) includes a base material (71) that is made of a ferromagnetic material and that faces the traveler (73), and
the resistance applying section includes a magnet (111) provided on the traveler (73).
The yarn winding device (2) according to claim 8, characterized in that the resistance applying section includes a resistance applying brush (116) which is provided on the rotary storage drum (50) and adapted to make contact with the traveler (73).
The yarn winding device (2) according to claim 5, characterized in that
the yarn regulating section (130) includes a rod-shaped member (132) provided on an end face on the package forming section (12) side in the axial direction of the rotary storage drum (50), rotatably supported by a central shaft of the rotary storage drum (50), and extending in a radial direction of the rotary storage drum (50), a distal end of the rod-shaped member (132) being the yarn hooking section.
The yarn winding device (2) according to claim 14, characterized in that the yarn regulating section (130) further includes a resistance applying section (133, 136, 141) adapted to apply a resistance that inhibits the rotation with respect to the rotary storage drum (50) on the rod-shaped member (132).
The yarn winding device (2) according to claim 15, characterized in that
the rod-shaped member (132) is made of a ferromagnetic material, and the resistance applying section includes a magnet (133) provided on an end face on the package forming section (12) side in the axial direction of the rotary storage drum (50).
The yarn winding device (2) according to claim 15, characterized in that the resistance applying section includes a first resistance applying brush (136) which is provided on an end face on the package forming section (12) side in the axial direction of the rotary storage drum (50) and adapted to make contact with a portion extending in a radial direction of the rotary storage drum (50) of the rod-shaped member (132).
The yarn winding device (2) according to claim 15, characterized in that the resistance applying section includes a second resistance applying brush (141) which is provided at a portion extending in a radial direction of the rotary storage drum (50) of the rod-shaped member (132) and adapted to make contact with an end face on the package forming section (12) side in the axial direction of the rotary storage drum (50).
The yarn winding device (2) according to any one of claims 1 to 4, characterized in that the yarn regulating section (155) includes a yarn regulating brush (155) which is provided on the rotary storage drum (50) and adapted to make contact with a yarn pulled out from the rotary storage drum (50) towards the package forming section (12).
The yarn winding device (2) according to any one of claims 1 to 4, characterized in that the yarn regulating section (150) includes a ring member (151) wound around an outer peripheral surface of the rotary storage drum (50), and
the ring member (151) includes a yarn passage (151a) through which the yarn passed between the yarn supplying section (11) and the package forming section (12) is introduced from a region on an outer side to a region on an inner side of the ring member (151) in the radial direction of the rotary storage drum (50).
The yarn winding device (2) according to claim 20, characterized in that the ring member (151) is spirally wound around the outer peripheral surface of the rotary storage drum (50) in a range longer than one turn in the peripheral direction, and
a gap (151a) formed between portions overlapping each other in the ring member (151) is the yarn passage.
An automatic winder (1) in which a plurality of the yarn winding devices (2) according to any one of claims 1 to 21 are arranged, the automatic winder (1) characterized by further comprising:
a yarn hooking device (3) adapted to hook the yarn of the yarn supplying bobbin (Bk) supported by the bobbin supporting section (21) of the plurality of yarn winding devices (2) to the package forming section (12); and

a second control section (9) adapted to control operations of the yarn winding device (2) and the yarn hooking device (3),

wherein the second control section (9) causes the yarn hooking device (3)

to hook the yarn passed between the yarn supplying section (11) and the package forming section (12) of the plurality of yarn winding devices (2) to the package forming section (12), and

to hook the yarn passed between the yarn supplying section (11) and the package forming section (12) to the rotary storage drum (50) by rotating the rotary storage drum (50) with the yarn hooked to the yarn regulating section (63, 130, 150, 155).