Field of the Invention
[0001] The present invention relates to a yarn take-up winder that winds continuously supplied
yarns.
Background of the Invention
[0002] Yarn take-up winders are conventionally known which wind yarns continuously supplied
from a spinning machine. Common yarn take-up winders include a turret, a bobbin holder
supported by the turret and on which a plurality of bobbins are set, and a traverse
device that traverses a yarn being wound around the bobbin. The common yarn take-up
winders are further configured such that a plurality of yarns continuously supplied
from the spinning machine are wound around the respective bobbins set on the bobbin
holder while being traversed by the traverse device.
[0003] Moreover, as disclosed in, for example, the Unexamined Japanese Patent Application
Publication (Tokkai-Hei) No.
2004-75340, one known yarn take-up winder has two turrets arranged close to each other. In this
yarn take-up winder, bobbin holders supported by the two turrets are arranged parallel
to one another. A plurality of yarns continuously supplied from the spinning machine
can be simultaneously wound around bobbins set on each of the two bobbin holders located
at a winding position.
[0004] Furthermore, in the yarn take-up winder disclosed in the Unexamined Japanese Patent
Application Publication (Tokkai-Hei) No.
2004-75340, a yarn engaging member (initial yarn engaging guide) is provided between the two
bobbin holders located at the winding position to engage yarns on respective empty
bobbins (initial yarn engaging) before the yarns are wound around the bobbins. The
yarn engaging member is movable between a retract position where the yarn engaging
member is retracted from the bobbins (bobbin holder) and a yarn pressing position
where the yarn engaging member presses the yarns against the respective bobbins. The
yarn take-up winder is further configured such that with the plurality of yarns threaded
between the two bobbin holders located at the winding position, the yarn engaging
member advances from the retract position to the yarn pressing position to engage
the yarns on the plurality of bobbins (specifically, in yarn catching grooves formed
at ends of the respective bobbins) set on each of the two bobbin holders.
[0005] In the conventional yarn take-up winders, each of the yarn engaging members performs
yarn engaging with the bobbins (bobbin holder) located at the winding position. However,
in this yarn engaging operation, the yarn engaging may fail depending on the positional
relationship between the bobbin holder and the yarn engaging member.
[0006] In case the distance between the bobbin holder located at the winding position and
the yarn engaging member is relatively long, an angle at which the yarns are wound
around the bobbins become small when the yarn engaging member is moved to the yarn
pressing position and presses the yarn against the bobbins. As a result, the yarns
cannot be easily caught in the respective yarn catching grooves in the corresponding
bobbins, resulting in a failure in the yarn engaging. Furthermore, the angle at which
the yarns are wound around the respective bobbins can be increased by greatly advancing
the yarn engaging member from the retract position towards the yarns during the yarn
engaging. However, in this case, a part of each of the yarns gripped by the yarn engaging
member has a relatively large curvature. If the rate of curvature of the yarn increases,
traveling resistance of the yarn that generates at the curvature increases. As a result,
the yarns may not be sufficiently sucked by a suction gun. Furthermore, the increased
rate of curvature of the yarn makes the tension of the yarn unstable, increasing the
frequency at which the yarn engaging fails.
[0007] Meanwhile, if the yarn engaging member is located too close to the bobbin holder
located at the winding position, a space for threading each of the yarns to the vicinity
of the corresponding bobbin is narrowed. This makes it difficult to thread the yarns
before the yarn engaging. In particular, in the yarn take-up winder disclosed in the
Unexamined Japanese Patent Application Publication (Tokkai-Hei) No.
2004-75340, the yarn engaging member is located between the two bobbin holders supported by
the two turrets, respectively, and located at the winding position. Thus, the space
for the yarn threading is limited. If the bobbin holder at the winding position is
placed further closer to the yarn engaging member in order to reduce the rate of curvature
of the yarn at the initial yarn engaging, the space through which the yarns being
sucked by the suction gun are threaded is further narrowed. This makes it extremely
difficult to achieve the yarn threading. Furthermore, it is possible to operate the
suction gun to move the yarns located between the two bobbin holders closer to one
of the bobbin holders to reduce the curvature of each of the yarns with respect to
the bobbins set on such bobbin holder. However, the yarns for the other bobbin holder
are moved away from such bobbin holder. Consequently, the curvature of the yarn increases
with respect to the other bobbin holder.
Summary of the Invention
[0008] An object of the present invention is to provide a yarn take-up winder configured
to, in engaging yarns on respective empty bobbins, reduce the curvature of each of
the yarns when the yarns are moved closer to the respective bobbins, for reliably
engaging to the yarns.
[0009] A yarn take-up winder according to a first aspect of the present invention includes
bobbin holders on each of which bobbins are set, two turrets, a turret driving means,
a traverse device, and a contact roller. The two turrets rotatably support the at
least two bobbin holders, respectively, and can also be rotated. The turret driving
means rotationally drives the two turrets. The traverse device traverses yarns being
wound around the respective bobbins. The contact roller is provided so that the contact
roller can make contact with the bobbins. Each of the bobbin holders can move to a
winding position where the bobbins set on the bobbin holder make contact with the
contact roller, and a standby position where the bobbins set on the bobbin holder
do not make contact with the contact roller. A yarn engaging member is provided inward
with respect to the two bobbin holders located at the winding position. The yarn engaging
member engages the yarns on the respective bobbins set on each of the two bobbin holders
at the winding position. Each of the two bobbin holders located at the winding position
is configured to be movable to a yarn engaging position located inward with respect
to the winding position.
[0010] According to the present invention, to engage the yarns on the respective bobbins,
the bobbin holders can be moved to the yarn engaging position located inward with
respect to the winding position. Thus, the yarns can be engaged on the respective
bobbins under a state in which the bobbins are located close to the yarns. This makes
it possible to ensure a sufficient angle at which the yarns are wound around the respective
bobbins, while reducing the curvature of each of the yarns at a part thereof which
is gripped by the yarn engaging member. Therefore, during initial yarn engaging, the
yarns can be more reliably engaged on the respective bobbins.
[0011] Furthermore, in the yarn take-up winder according to the present invention, arrangements
such as the traverse device and the contact roller which perform yarn winding are
respectively provided for each of the two bobbin holders supported by the two turrets,
respectively, and located at the winding position. Therefore, even if an attempt is
made to move the winding position itself of the bobbin holders closer to the yarn
engaging member in order to provide the bobbin holders and the yarn engaging member
close to one another during the initial yarn engaging, there is a space restriction
for moving the traverse device and the contact roller or the like. Thus, in the present
invention, the winding position of the bobbin holders is set at a relatively outward
position where the traverse device and the contact roller are prevented from interfering
with each other. For the initial yarn engaging performed by the yarn engaging member,
only the bobbin holders are moved to the yarn engaging position located inward with
respect to the winding position.
[0012] According to a second aspect of the present invention, in the yarn take-up winder,
the yarn engaging member is movable to a retract position, a yarn pressing position
and a yarn gripping position. The retract position is a position where the yarn engaging
member does not make contact with the yarns.
[0013] The yarn pressing position is a position located outward with respect to the retract
position and at which the yarn engaging member presses the yarns against the respective
bobbins. The yarn gripping position is a position located between the retract position
and the yarn pressing position and at which the yarn engaging member grips the yarns.
[0014] According to the present invention, the yarn engaging member moves from the retract
position to the yarn gripping position, and grips the yarns at the yarn gripping position.
The yarn engaging member further moves to the yarn pressing position, where the yarn
engaging member can press the gripped yarns against the respective bobbins. Consequently,
the yarns can be reliably engaged on the respective bobbins.
[0015] According to a third aspect of the present invention, in the yarn take-up winder,
before each of the two bobbin holders moves from the winding position to the yarn
engaging position, the yarn engaging member moves from the yarn gripping position
to the retract position.
[0016] According to the present invention, immediately before the yarn engaging, the yarn
engaging member is located at the retract position. Therefore, compared with a case
in which the yarn engaging member remains at the yarn gripping position where the
yarn engaging member has gripped the yarns, a larger space can be obtained for yarn
paths at the bobbin holders located at the winding position. Thus, the bobbins can
be moved further closer to the respective yarns, reducing the curvature of each of
the yarns.
[0017] Other features, elements, processes, steps, characteristics and advantages of the
present invention will become more apparent from the following detailed description
of preferred embodiments of the present invention with reference to the attached drawings.
Brief Description of the Drawings
[0018]
Figure 1 is a front view of a yarn take-up winder according to an embodiment of the
present invention in which yarn threading has been completed.
Figure 2 is a side view of the yarn take-up winder in Figure 1.
Figure 3 is a block diagram schematically showing the electrical configuration of
the yarn take-up winder.
Figure 4 is a front view of the yarn take-up winder in which yarns are being gripped.
Figure 5 is a side view of the yarn take-up winder in which the yarns are being regulated.
Figure 6 is a front view of the yarn take-up winder in which yarn engaging is being
performed.
Figure 7 is a front view of the yarn take-up winder in which the yarn engaging has
been completed.
Detailed Description of the Preferred Embodiment
[0019] An embodiment of the present invention will be described. As shown in Figure 1, a
spinning machine (not shown in the drawings) continuously supplies a plurality of
(in the present embodiment, sixteen) yarns Y via two rollers 2 and 3 to a yarn take-up
winder 1. In the present embodiment, the yarns Y are filaments made up of synthetic
fibers. A yarn guide 4 is provided between the yarn take-up winder 1 and a downstream-side
roller 3 located on a downstream side in a yarn traveling direction, to separate the
plurality of yarns Y from one another at predetermined intervals. The yarn take-up
winder 1 is configured such that a plurality of yarns Y supplied from the spinning
machine via the rollers 2, 3 and the yarn guide 4 are wound around a plurality of
bobbins 20.
[0020] As shown in Figure 1 and Figure 2, the yarn take-up winder 1 includes two disc-shaped
turrets 11, bobbin holders 12 and 13, two contact rollers 14, two traverse devices
15, and a yarn engaging device 16 or the like. Each of the turrets 11 is rotatably
provided in a unit frame 10. The bobbin holders 12 and 13 are rotatably supported
by the respective turrets 11 and configured such that the plurality of bobbins 20
are set on the bobbin holders 12 and 13. Each of the contact rollers 14 is provided
such that the contact rollers 14 can make contact with the bobbins 20 set on the bobbin
holders 12 and 13. Each of the traverse devices 15 is a device that traverses the
yarn Y being wound around the corresponding bobbin 20. Each of the yarn engaging devices
16 is a device that engages the yarn Y on the empty bobbin 20 (initial yarn engaging).
[0021] In the description below, for arrangements that form a pair by right and left such
as the turrets 11 and the bobbin holders 12 and 13, an addition of "a" to a reference
numeral indicates that the component is positioned in the right in Figure 1. An addition
of "b" to a reference numeral indicates that the component is positioned in the left
in Figure 1.
[0022] The two disc-shaped turrets 11 (11a and 11b), respectively, are rotatably provided
in the unit frame 10 in parallel to a vertical plane. Two bobbin holders 12 and 13
are fixed at two respective positions that are symmetric with respect to a rotating
center of the respective turrets 11. The two bobbin holders 12 and 13 extend horizontally
in a direction that orthogonal to the turrets 11. The bobbin holders 12 and 13, supported
by the respective turrets 11, rotate integrally with the turrets 11. A plurality of
(in the present embodiment, eight) the bobbins 20 are set on each of a total of four
bobbin holders 12a, 13a, 12b, 13b, supported by the two turrets 11, so that the bobbins
20 are arranged in an axial direction of each of the bobbin holders 12 and 13. As
shown in Figure 2, a yarn catching groove 21 is formed at an axial end of each of
the bobbins 20 to catch the yarn Y when yarn engaging is performed as described below.
[0023] Each of the two turrets 11 is driven and rotated by a turret driving motor 42 (see
Figure 3: turret driving means). By rotating the turrets 11 by turret driving motors
42, the two bobbin holders 12 and 13 supported by the respective turrets 11 are moved
to a winding position P1 (P1a, P1b) and a standby position P2 (P2a, P2b). The winding
position P1 (P1a, P1b) is a position where the bobbins 20 are made contact with the
contact roller 14 to wind the yarns Y around the respective bobbins 20. The standby
position P2 (P2a, P2b) is a position in a point symmetry with the winding position
P1 (P1a, P1b) with respect to a rotating center of each of the turrets 11. That is,
it is possible to alternately switch the bobbin holder 12 located at the winding position
P1 in Figure 1 and the bobbin holder 13 located at the standby position P2 in Figure
1. Further, when switching the bobbin holders 12 and 13, the two turrets 11 are rotated
in opposite directions. Specifically, the right turret 11a rotates clockwise in Figure
1, while the left turret 11b rotates counterclockwise in Figure 1.
[0024] A total of four bobbin holders 12a, 13a, 12b, 13b supported by the two turrets 11
are each driven and rotated by a bobbin driving motor 43 (see Figure 3). The two bobbin
holders 12, that is, the right and left bobbin holders 12, located at the winding
position P1, rotate to wind the yarns Y around the respective bobbins 20 set on each
of the bobbin holders 12.
[0025] The two contact rollers 14 and the two traverse devices 15 are supported by respective
elevating and lowering frames 17 arranged capable of elevating and lowering with respect
to the unit frame 10. The two contact rollers 14 and the two traverse devices 15 are
movable integrally with the respective elevating and lowering frames 17 in a vertical
direction.
[0026] When winding the yarns Y around the respective bobbins 20 on the bobbin holder 12
located at the winding position P1, each of the contact rollers 14 directly makes
contact with a surface of each of the bobbins 20 or with a surface of a yarn layer
(package) formed around each of the bobbins 20. Accordingly, when the yarns are wound
around the respective bobbins 20, the yarn layer formed around each of the bobbins
20 is pressed to adjust the shape of the package and to increase the hardness of the
package.
[0027] The traverse devices 15 have a plurality of traverse guides 18 arranged in two lines
in the axial direction of the two bobbin holders 12 located at the winding position
P1, in association with the plurality of bobbins 20 respectively, set on each of the
bobbin holders 12. The traverse guides 18 are driven and reciprocated in the axial
direction of the bobbin holders 12 by a driving mechanism (not shown in the drawings)
in order to wind the yarns Y around the respective bobbins 20 while traversing the
yarns Y within a predetermined traverse range.
[0028] The elevating and lowering frames 17 have a plurality of traverse support point guides
19 arranged in two lines in the axial direction of the two bobbin holders 12 located
at the winding position P1, in association with the plurality of bobbins 20 set on
each of the bobbin holders 12. When winding the yarns Y around the respective bobbins
20, each of the traverse support point guides 19 is fixed at an axially central position
of the corresponding bobbin 20. Meanwhile, for initial yarn engaging in which the
yarns Y are engaged on the respective empty bobbins 20, the traverse support point
guides 19 are moved toward an axially leading end (left in Figure 2: operator side)
of each of the bobbin holders 12 by a fluid cylinder or the like (see Figure 2).
[0029] With each of the traverse support point guides 19 located at the axially central
position of the corresponding bobbin 20 and each of the yarns Y held by the corresponding
traverse support point guide 19, the traverse guides 18 reciprocates in the axial
direction of the bobbin holders 12 located at the winding position P1. Accordingly,
the yarns Y are wound around the respective bobbins 20 while being traversed within
the predetermined traverse range.
[0030] Furthermore, the elevating and lowering frames 17 have two yarn disengaging guides
22, that is, a right yarn disengaging guide and a left yarn disengaging guide 22.
Each of the yarn disengaging guides 22 can advance and recede with respect to yarn
paths (traveling paths for the yarns Y before yarn engaging) in order to disengage
the yarns Y from the respective traverse guides 18 when the yarn engaging devices
16, described below, engage the yarns on the respective empty bobbins 20. Moreover,
the elevating and lowering frames 17 have two yarn regulating guides 23, that is,
a right yarn regulating guide and a left yarn regulating guide, which regulate the
yarns Y supplied from above to the positions corresponding to the yarn catching grooves
21 on the bobbins 20, on which the respective yarns Y are to be caught during the
initial yarn engaging.
[0031] Next, the yarn engaging device 16 will be described. The yarn engaging device 16
includes a guide support 24 and the yarn enagaging members 25 movably coupled to the
guide support 24.
[0032] The guide support 24 is located between the two bobbin holders 12a and 12b, that
is, the right bobbin holder 12a and the left bobbin holder 12b, located at the winding
positions P1a and P1b. The guide support 24 is provided upright from the bottom of
the unit frame 10. A plurality of (in the present embodiment, eight) yarn engaging
members 25 are provided on both right and left side edges of the guide support 24,
and arranged in an axial direction of the bobbin holders 12. Further, the yarn engaging
members 25 are provided for each of the plurality of the bobbins 20 set on each of
the bobbin holders 12.
[0033] Each of the yarn engaging members 25 is a member that is elongate in one direction
and has gripping portions 26 at a leading end thereof. The yarn engaging member 25
can be moved in the axial direction of the bobbin holders 12 by being driven by driving
means such as a fluid cylinder.
[0034] Each of the yarn engaging members 25 is coupled to the guide support 24 via a link
mechanism (not shown in the drawings). The yarn engaging member 25 is movable via
the link mechanism to a retract position (see Figure 1), a yarn gripping position
(see Figure 4) and a yarn pressing position (see Figures 6 and 7). The yarn gripping
position is a position where the yarn engaging member 25 is retracted from the corresponding
bobbin 20. The yarn gripping position is a position where the yarn engaging member
25 is located slightly outward (yarn path side) with respect to position to grip the
yarn Y. The yarn pressing position is a position where the yarn engaging member 25
is located further outward with respect to the yarn gripping position to press the
yarn Y against the corresponding bobbin 20.
[0035] In the present embodiment, the right and left yarn engaging members 25 are arranged
between the two bobbin holders 12a and 12b; the yarn engaging members 25 perform a
yarn engaging operation on the bobbins 20 set on each of the two bobbin holders 12a
and 12b located at the winding position P1. Consequently, the yarn take-up winder
1 can be made compact to reduce the overall dimensions thereof.
[0036] Next, the electrical configuration of the yarn take-up winder 1 will be briefly described
with reference to a block diagram of Figure 3. As shown in Figure 3, a control device
40 that controls the whole yarn take-up winder 1 includes a central processing unit
(CPU) that is an arithmetic processing device, a read-only memory (ROM) that stores
programs to be executed by the CPU and data to be used for the programs, a random
access memory (RAM) that temporarily stores data during the execution of the programs,
and the like. In accordance with instructions input via an operation box 41 on the
yarn take-up winder 1, the control device 40 controls the operations of appropriate
portions of the yarn take-up winder 1 such as the turret driving motor 42 that drives
and rotates the turrets 11, a bobbin driving motor 43 that drives and rotates the
bobbin holders 12 and 13, and the fluid cylinders or the like which drive the traverse
devices 15, the yarn engaging devices 16, and the various guides including the yarn
traverse support guides 19, the yarn disengaging guides 22, and the yarn regulating
guides 23.
[0037] The operation (particularly during initial yarn engaging) of the yarn take-up winder
1 will be described with reference to Figures 1, 2 and Figures 4 to 7.
[0038] When an operator inputs a predetermined instruction to the yarn take-up winder 1
via the operation box 41, the control device 40 controls the appropriate portions
of the yarn take-up winder 1 in accordance with the input instruction. Accordingly,
the yarn engaging operation and winding operation of the yarns Y are simultaneously
performed on the plurality of bobbins 20 set on each of the two bobbin holders 12a
and 12b located at the winding positions P1a and P1b.
[0039] First, as shown in Figures 1 and 2, before the yarns are engaged on the respective
empty bobbins 20 set on each of the two bobbin holders 12a and 12b located at the
winding position P1, the plurality of traverse support point guides 19 corresponding
to the plurality of bobbins 20 set on each of the bobbin holders 12a and 12b are gatherd
toward the leading end side(the left side in Figure 2) of the elevating and lowering
frame 17. Furthermore, under a state in which the yarn engaging members 25 of the
yarn engaging device 16 are respectively retracted to the retract position between
the two bobbin holders 12a and 12b located at the winding position P1, the yarn engaging
members 16 are gathered toward the leading end (that is, operator side) of the guide
support 24.
[0040] Under such a state, while being sucked by the suction gun 50, a plurality of yarns
Y continuously fed from a spinning machine (not shown in the drawings) via the rollers
2, 3 and the yarn guide 4 are engaged on the plurality of traverse support point guides
19, respectively, which have been gathered toward the leading end side of the elevating
and lowering frame 17 as described above.
[0041] Moreover, as shown in Figure 2, a position where the suction gun 50 performs suction
is fixed to the leading end side of the unit frame 10, and the plurality of yarns
Y engaged on the respective traverse support point guides 19 are gathered toward the
leading end side. Then, under such a state, as shown in Figure 1, the yarns Y are
threaded through the space between each of the two bobbin holders 12a and 12b located
at the winding positions P1a and P1b and the yarn engaging members 25 located at the
retract position. Furthermore, at this time, the yarn disengaging guide 22 is moved
forward to prevent the threaded yarns Y from being engaged on the traverse guide 18
of the traverse device 15.
[0042] Next, as shown in Figure 4, the right and left yarn engaging members 25 are slightly
opened and moved to the yarn gripping position, located slightly outward (yarn path
side) with respect to the retract position shown in Figure 1. At this time, the yarns
Y are gripped by the gripping portions 26 provided at the leading end of the corresponding
yarn engaging members 25.
[0043] Subsequently, as shown in Figure 5, the plurality of traverse support point guides
19 with the yarns Y engaged thereon and the plurality of yarn engaging members 25
gripping the respective yarns Y are moved towards a base end side (the right side
in Figure 5) of each of the bobbin holders 12. Then, each of the yarn engaging members
25 is positioned so as to face the yarn catching groove 21 formed at an end portion
of the corresponding bobbin 20. Furthermore, at this time, each of the yarn regulating
guides 23 is moved forward to regulate the yarns Y with respect to the axial direction
of the bobbin holder 12 so as to prevent the yarns Y gripped by the respective yarn
engaging members 25 from being displaced from a position where the yarns Y lie along
the respective yarn catching grooves 21.
[0044] Next, as shown in Figure 6, the turret driving motor 42 rotates (backward rotation)
the two turrets 11 in the directions opposite to the direction in which the turrets
11 are rotated to switch the bobbin holders 12 and 13 (forward rotation). That is,
as shown by arrows in Figure 6, the right side turret 11 is rotated counterclockwise
while the left side turret 11 is rotated clockwise.
[0045] Then, the two bobbin holders 12a and 12b located at the winding positions P1a and
P1b are moved to the yarn engaging positions P3a and P3b located inward with respect
to the winding positions P1a and P1b (yarn engaging members 25 side). Accordingly,
the bobbins 20 set on the two bobbin holders 12a and 12b are moved closer to the respective
yarn paths (traveling paths for the yarns Y) than when the bobbin holders 12a and
12b are respectively located at the winding positions P1a and P1b.
[0046] Next, as shown in Figure 7, the right and left yarn engaging members 25 are further
opened and moved to the yarn pressing position where the yarn engaging members 25
are located further outward with respect to the yarn gripping position (yarn path
side) shown in Figure 4. Accordingly, the plurality of yarns Y gripped by the gripping
portions 26 of the plurality of yarn engaging members 25 are pressed against the corresponding
bobbins 20. The yarns Y are thus engaged on the respective yarn catching grooves 21
of the corresponding bobbins 20.
[0047] As described above, the two bobbin holders 12a and 12b located at the winding positions
P1a and P1b are moved to the yarn engaging positions P3a and P3b, respectively, located
inward with respect to the winding positions P1a and P1b (yarn engaging member 25
side). Then, with the empty bobbins 20 located close to the yarns Y, the right and
left yarn engaging members 25 move forward to the yarn pressing position to engage
the yarns Y on the respective bobbins 20. As a result, it possible to obtain a sufficient
angle at which the yarns Y are wound around the respective bobbins 20, while reducing
the curvature of each of the yarns Y at a part thereof gripped by the gripping portion
26. Thus, during the initial yarn engaging, the yarns Y can be more reliably engaged
on the respective bobbins 20.
[0048] Furthermore, each of the yarn engaging members 25 moves from the retract position
(see Figure 1) to the yarn gripping position (see Figure 4) to reliably grip the yarns
Y, and then moves to the yarn pressing position (see Figure 6) to press the gripped
yarns Y against the respective bobbins 20. As a result, the yarns Y can be more reliably
engaged on the respective bobbins 20.
[0049] In the yarn engaging operation performed by each of the yarn engaging members 25
as described above, after the yarn engaging member 25 moves to the yarn gripping position
to allow the gripping portion 26 to grip the yarns Y as shown in Figure 4, the yarn
engaging member 25 may be returned to the retract position shown in Figure 1 again.
Then, for the yarn engaging shown in Figure 6, the yarn engaging member 25 may be
advanced from the retract position to the yarn pressing position. In this case, immediately
before the yarn engaging (before the yarn engaging member 25 advances to the yarn
pressing position), a larger space can be obtained inward with respect to the winding
position P1 (yarn path side) than in a case in which the yarn engaging member 25 remains
at the yarn gripping position where the yarn engaging member 25 has moved to grip
the yarns Y. As a result, the bobbin holders 12a and 12b can be moved to the yarn
engaging position located more inward (yarn path side). That is, during the yarn engaging,
the bobbins 20 can be moved closer to the respective yarns Y to reduce the curvature
of each of the yarns Y.
[0050] Once the yarns Y are engaged on the respective bobbins 20 set on each of the two
bobbin holders 12a and 12b as described above, the yarn regulating guide 23 and the
yarn disengaging guide 22 are retracted as shown in Figure 7. Accordingly, the regulation
of the positions of the yarns Y in the axial direction of the bobbin holders 12 by
the yarn regulating guide 23 is canceled. In addition, a state in which the yarns
Y are disengaged from the traverse guide 18 by the yarn disengaging guide 22 is also
canceled. Accordingly, the yarns Y are caught by the traverse guide 18.
[0051] Moreover, the turret driving motor 42 rotates (forward rotation) the two turrets
11 in directions opposite to the directions in which the turrets 11 are rotated during
the yarn engaging. That is, in Figure 7, the right turret 11a is rotated clockwise,
while the left turret 11b is rotated counterclockwise.
[0052] Accordingly, the two bobbin holders 12a and 12b located at the yarn engaging positions
P3a and P3b respectively return to the winding positions P1a and P1b located outward
with respect to the yarn engaging positions P3a and P3b. Under this state, the traverse
guides 18 are reciprocated in the axial direction of each of the bobbin holders 12
to traverse the yarns Y with the respective traverse support point guides 19 as a
traverse center. At the same time, the bobbin driving motor 43 rotates the bobbin
holders 12 to wind the yarns Y around the plurality of the bobbins 20 set on the bobbin
holders 12.
[0053] Furthermore, when a predetermined amount of yarn Y is wound around each of the bobbins
20 set on each of the bobbin holders 12 located at the winding position P1 and a fully
wound package is formed, the turret driving motor 42 rotates the two turrets 11 forward
to switch the bobbin holder 12 located at the winding position P1 and the bobbin holder
13 placed at the standby position P2.
[0054] Then, the yarns Y are wound around the plurality of bobbins 20 set on the bobbin
holder 13 that have newly arrived at the winding position P1.
[0055] The embodiment of the present invention has been described. However, the present
invention is not limited to the above-described embodiment. Many variations may be
made to the embodiment without departing from the spirit of the present invention.
An example of such a variation will be described below.
[0056] In the yarn take-up winder according to the above-described embodiment, the bobbin
driving motor 43 directly drives and rotates the bobbin holders 12 and 13 to wind
the yarns Y around the respective bobbins 20. However, the yarn take-up winder may
be a winder adopting a friction drive method in which the contact roller 14, which
makes contact with the bobbins 20, is driven and rotated by a motor or the like to
rotate the bobbins 20 by the contact friction between the contact roller 14 and the
bobbins 20.