BACKGROUND OF THE INVENTION
[0001] The present invention relates to an interlacing device configured to interlace yarns.
[0002] Patent Literature 1 (Japanese Unexamined Patent Publication No.
2016-160550) recites a spun yarn take-up apparatus including an interlacing device configured
to interlace yarns. In this interlacing device, a plurality of yarn running spaces
are lined up on a single line. In each yarn running space, yarns are interlaced by
injecting fluid into the space while the yarns are running. Furthermore, in the interlacing
device of Patent Literature 1, a yarn is introduced into each yarn running space through
a slit (equivalent to a first yarn passage of the present invention) which extends
in the up-down direction and a yarn insertion gap (equivalent to a second yarn passage
of the present invention) which is connected to the lower end of the slit and extends
horizontally.
SUMMARY OF THE INVENTION
[0003] In the spun yarn take-up apparatus including the interlacing device recited in Patent
Literature 1, for example, insertion of a yarn into the slit of the interlacing device
is prohibited, and after yarn threading to parts other than the interlacing device
of the spun yarn take-up apparatus is completed, the prohibition is canceled, and
the yarn is introduced into the yarn running space via the slit and the yarn insertion
gap, by utilizing the tension of the yarn. However, in this case, at least some of
the yarns may not be inserted into the slits even after the prohibition of insertion
of yarns into the slit is canceled. The yarns not inserted into the slits are not
introduced into the yarn running spaces. In such a case, the yarns must be manually
introduced into the yarn running spaces by an operator.
[0004] An object of the present invention is to provide an interlacing device in which a
yarn is certainly inserted into a yarn introduction passage through which the yarns
is introduced into a yarn running space.
[0005] According to the first aspect of the invention, an interlacing device includes: an
interlacing portion configured to interlace a yarn; and a yarn introduction device
configured to introduce the yarn into the interlacing portion, the interlacing portion
including: a yarn running space in which the yarn runs; an injection unit configured
to inject air into the yarn running space; and a yarn introduction passage through
which the yarn is introduced into the yarn running space, the yarn introduction passage
including a first yarn passage which extends in a first direction orthogonal to a
yarn running direction in the yarn running space and has a yarn insertion slot at
an end on one side in the first direction, and the yarn introduction device including
an insertion member which presses the yarn from the one side toward the other side
in the first direction to insert the yarn into the first yarn passage through the
insertion slot.
[0006] According to this aspect, as the yarn is pressed from the one side toward the other
side in the first direction by the insertion member, the yarn is certainly inserted
into the first path extending in the first direction.
[0007] According to the second aspect of the invention, the interlacing device of the first
aspect is arranged such that, the yarn introduction passage further includes a second
yarn passage which is connected to an end of the first yarn passage on the other side
in the first direction and extends along a second direction which is orthogonal to
the yarn running direction and intersects with the first direction, and the yarn introduction
device further includes a movement member which presses, in the second direction,
the yarn inserted in the first yarn passage to move the yarn along the second yarn
passage.
[0008] After the yarn is inserted into the first yarn passage by the insertion member, the
yarn having been inserted into the first yarn passage may be caught in the second
yarn passage. According to the aspect above, as the yarn inserted into the first yarn
passage is pressed in the second direction by the movement member, the yarn moves
along the second yarn passage extending in the second direction.
[0009] According to the third aspect of the invention, the interlacing device of the second
aspect is arranged such that the yarn introduction device includes a common member
which functions as both the insertion member and the movement member and is configured
to press the yarn by exerting force including a component in the first direction and
a component in the second direction to the yarn.
[0010] According to this aspect, because the common member functioning as both the insertion
member and the movement member is provided, the structure of the interlacing device
is simple as compared to cases where the insertion member and the movement member
are independently provided.
[0011] According to the fourth aspect of the invention, the interlacing device of the third
aspect is arranged such that the common member is a swing member which is swung to
press the yarn.
[0012] According to this aspect, force having a component in the first direction and a component
in the second direction can be applied to the yarn Y by the swing member which has
a simple structure.
[0013] According to the fifth aspect of the invention, the interlacing device of the fourth
aspect is arranged such that the swing member is swung about a shaft which is parallel
to the yarn running direction.
[0014] According to this aspect, because the swing member is swung about the shaft parallel
to the yarn running direction, the length of a space required to provide the swing
member is short in the yarn running direction, and hence the interlacing device is
downsized in the yarn running direction.
[0015] According to the sixth aspect of the invention, the interlacing device of any one
of the second to fifth aspects is arranged such that the yarn introduction passage
further includes a third yarn passage which is connected to an end of the second yarn
passage opposite to the first yarn passage, and extends toward the one side in the
first direction from a junction with the second yarn passage.
[0016] According to this aspect, as the yarn is pressed by the insertion member and the
movement member, the yarn is moved to the junction between the second yarn passage
and the third yarn passage. Thereafter, as the pressing of the yarn by the insertion
member and the movement member is canceled, the yarn moves in the third yarn passage
and reaches the yarn running space, on account of the tension of itself.
[0017] According to the seventh aspect of the invention, the interlacing device of any one
of the first to sixth aspects is arranged such that the yarn introduction device is
provided upstream of at least the interlacing portion in the yarn running direction.
[0018] According to this aspect, as a yarn part upstream of the interlacing portion in the
yarn running direction is pressed by the yarn introduction device, the yarn is inserted
into the first yarn passage. When a running yarn is pressed by the yarn introduction
device, a pressed part of the yarn is temporarily restricted. On this account, a part
downstream of the pressed part of the yarn temporarily has increased tension, with
the result that the yarn path becomes stable. Meanwhile, a part upstream of the pressed
part of the yarn temporarily has decreased tension and is slackened, with the result
that the yarn path becomes unstable. According to the aspect above, because the yarn
introduction device is provided upstream of the interlacing portion in the yarn running
direction, a yarn part with a stable yarn path, which is downstream of a part of the
yarn pressed by the yarn introduction device, is introduced into the interlacing portion.
On this account, according to the aspect above, the yarn is easily introduced to the
interlacing portion as compared to cases where the yarn introduction device is provided
downstream of the interlacing portion in the yarn running direction.
[0019] According to the eighth aspect of the invention, the interlacing device of the seventh
aspect further includes a yarn guide which is provided upstream of the interlacing
portion in the yarn running direction, the yarn introduction device being provided
at least between the interlacing portion and the yarn guide in the yarn running direction.
[0020] When the yarn guide is provided upstream of the interlacing portion and the yarn
introduction device is provided upstream of the yarn guide in the yarn running direction,
the movement of the yarn in the interlacing portion when the yarn is pressed by the
yarn introduction device may be obstructed by the yarn guide. According to the aspect
above, the yarn introduction device is provided between the interlacing portion and
the yarn guide in the yarn running direction. On this account, the movement of the
yarn in the interlacing portion is not obstructed by the yarn guide when the yarn
is pressed by the yarn introduction device.
[0021] The present invention makes it possible to certainly introduce the yarn into the
yarn introduction passage.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022]
FIG. 1 is a schematic diagram of a spun yarn take-up apparatus.
FIG. 2 is a perspective view showing the outline of an interlacing device.
FIG. 3 shows the interlacing device of FIG. 2 when viewed from one side in the height
direction.
FIG. 4 shows the interlacing device of FIG. 2 when viewed from the right side.
FIG. 5 is a cross section of a part of an interlacing portion taken along a plane
which is parallel to the left-right direction and the height direction.
FIG. 6 is a block diagram illustrating an electric structure of the interlacing device
and a controller.
FIG. 7 corresponds to FIG. 3 and shows a state in yarn threading.
FIG. 8 corresponds to FIG. 4 and shows a state in yarn threading.
FIG. 9 corresponds to FIG. 3 and shows a state in which a yarn regulation bar is returned
to a regulation cancellation position and a swing member is moved to a pressing completion
position.
FIG. 10 corresponds to FIG. 4 and shows a state in which the yarn regulation bar is
returned to the regulation cancellation position and the swing member is moved to
the pressing completion position.
FIG. 11(a) shows a state in which a yarn outside a yarn introduction passage is pressed
by a swing member. FIG. 11(b) shows a state in which a yarn in a first yarn passage
is pressed by the swing member. FIG. 11(c) shows a state in which a yarn in a second
yarn passage is pressed by the swing member. FIG. 11(d) shows a state in which a yarn
in a third yarn passage and a yarn running space is pressed by the swing member.
FIG. 12 relates to an interlacing portion of a modification and corresponds to FIG.
5.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0023] The following will describe a preferred embodiment of the present invention.
(Spun Yarn Take-Up Apparatus)
[0024] As shown in FIG. 1, a spun yarn take-up apparatus 1 takes up synthetic fiber yarns
Y spun out from a spinning apparatus 2 and formed of filaments f, and forms packages
P by winding the yarns Y onto bobbins B, respectively. The description below is given
on the premise that the up-down direction, front-back direction, and left-right direction
in FIG. 1 are respectively the up-down direction relative to the spun yarn take-up
apparatus 1, the front-back direction relative to the spun yarn take-up apparatus
1, and the left-right direction relative to the spun yarn take-up apparatus 1.
[0025] The spun yarn take-up apparatus 1 includes members such as a cooling unit 3, an oil
supply unit 4, a drawing unit 5, take-up rollers 6 and 7, an interlacing device 8
(an interlacing device of the present invention), and a winding device 9. In the spinning
apparatus 2, polymer supplied from a polymer supplier (not illustrated), which is
a gear pump, for example, is extruded downward through spinnerets 2a which are lined
up in the left-right direction (the direction away from the viewer of FIG. 1). As
a consequence, yarns Y formed of filaments F are spun out while being lined up in
the left-right direction.
[0026] The yarns Y spun out from the spinnerets 2a of the spinning apparatus 2 travel along
a yarn path through the cooling unit 3, the oil supply unit 4, the drawing unit 5,
the take-up roller 6, the interlacing device 8, and the take-up roller 7, while being
lined up in the left-right direction. The yarns Y are distributed in the front-back
direction from the take-up roller 7, and are then wound onto the bobbins B at the
winding device 9.
[0027] The cooling unit 3 includes a plurality of cylindrical cooling cylinders 10. Each
cooling cylinder 10 is provided below the corresponding spinneret 2a of the spinning
apparatus 2. The yarns Y spun out from the spinnerets 2a of the spinning apparatus
2 run downward in internal spaces 10a of the cooling cylinders 10, along the axial
direction of the cooling cylinder 10. A flow adjustment section 10b is provided around
the internal space 10a. Cooling wind supplied from an unillustrated pressurized air
supplier flows into the internal space 10a while being adjusted by the flow adjustment
section 10b. The flow adjustment section 10b mainly performs the adjustment in such
a way that the flow rate of the cooling wind flowing into the internal space 10a is
more or less even in the circumferential direction of the cooling cylinder 10.
[0028] The oil supply unit 4 includes oil supply guides 11 which are provided below the
respective cooling cylinders 10. The oil supply guide 11 gathers filaments F spun
out from the spinneret 2a into a single yarn Y, and applies oil to the yarn Y (filaments
F).
[0029] The drawing unit 5 is provided below the oil supply unit 4. The drawing unit 5 includes:
a heat retaining box 12; and heating rollers (not illustrated) accommodated in the
heat retaining box 12. By the heating rollers, the drawing unit 5 draws the yarns
Y while heating them.
[0030] The yarns Y drawn by the drawing unit 5 are sent to the winding device 9 by the take-up
rollers 6 and 7. The interlacing device 8 is provided between the take-up roller 6
and the take-up roller 7 to interlace filaments F constituting each yarn Y. The details
of the interlacing device 8 will be given later.
[0031] The winding device 9 includes members such as a frame 13, a turret 14, two bobbin
holders 15, a supporting frame 16, a contact roller 17, and a traverse unit 18. The
winding device 9 simultaneously winds the yarns Y sent from the take-up roller 7 onto
the bobbins B by rotating the bobbin holder 15, so as to form packages P.
[0032] The turret 14 is a disc-shaped member and is attached to the frame 13. The turret
14 is rotationally driven by a motor which is not illustrated. The two bobbin holders
15 are cantilevered by the turret 14 to extend in the front-back direction. To each
bobbin holder 15, cylindrical bobbins B are attached to be lined up along the axial
direction of the bobbin holder 15. As the turret 14 rotates, the positions of the
two bobbin holders 15 are switched between an upper winding position and a lower retracted
position.
[0033] The supporting frame 16 is a frame-shaped member which is long in the front-back
direction. This supporting frame 16 is fixed to the frame 13. A roller supporting
member 19 which is long in the front-back direction is attached to a lower part of
the supporting frame 16 so as to be vertically movable relative to the supporting
frame 16. The roller supporting member 19 supports the contact roller 17 in a rotatable
manner. The contact roller 17 extends in the axial direction of the bobbin holders
15. As this contact roller 17 makes contact with a package P under the formation and
the contact roller 17 applies a predetermined contact pressure to the package P, the
shape of the package P is adjusted.
[0034] The traverse unit 18 includes traverse guides 18a lined up in the front-back direction.
The traverse guides 18a are driven by a motor (not illustrated) and are configured
to reciprocate in the front-back direction. As each traverse guide 18a to which the
yarn Y is threaded reciprocates, the yarn Y is wound onto the corresponding bobbin
B while being traversed about a fulcrum guide 18b.
(Interlacing Device)
[0035] Now, the interlacing device 8 will be detailed. As shown in FIG. 2 to FIG. 5, the
interlacing device 8 includes a base 20, an interlacing portion 21, upstream yarn
guides 22, downstream yarn guides 23, a yarn regulation bar 24, and a swing member
25 (a common member of the present invention). In the interlacing device 8, yarns
Y run in a yarn running direction which is inclined relative to the front-back direction
so as to be a positive slope in the rearward direction. Furthermore, hereinafter,
a direction orthogonal to both the yarn running direction and the left-right direction
(a second direction in the present invention) is defined as a height direction of
the interlacing device 8 (a first direction in the present invention), and one side
and the other side in the height direction are defined as shown in FIG. 2.
[0036] The base 20 is substantially rectangular parallelepiped in shape. An interlacing
portion 21 is constructed such that interlacing pieces 26 are lined up in the left-right
direction on a surface of the base 20 on one side in the height direction. The interlacing
portion 21 includes yarn running spaces 31, yarn introduction passages 32, and injection
passages 33. The yarn running spaces 31 are formed in the respective interlacing pieces
26. The yarn running space 31 is substantially elliptical in shape and is long in
the left-right direction when viewed in the yarn running direction. In the yarn running
direction, the yarn running space 31 extends over the entire length of the interlacing
piece 26 and is open at the both ends.
[0037] The yarn introduction passages 32 are passages provided for the respective yarn running
spaces 31 to introduce the yarns Y to the yarn running spaces 31. In the yarn running
direction, the yarn introduction passage 32 extends over the entire length of the
interlacing piece 26 and is open at the both ends. The yarn introduction passage 32
includes a first yarn passage 36, a second yarn passage 37, and a third yarn passage
38.
[0038] The first yarn passage 36 is a gap formed between two neighboring interlacing pieces
26, and extends in the height direction at a substantially upper half of the interlacing
piece 26. One end in the height direction of the first yarn passage 36 is an insertion
slot 36a from which the yarn Y is inserted.
[0039] The second yarn passage 37 is connected to the other end of the first yarn passage
36 in the height direction, and extends rightward from the junction with the first
yarn passage 36. The third yarn passage 38 is connected to the right end of the second
yarn passage 37, and extends toward the one side in the height direction from the
junction with the second yarn passage 37. An end on the one side in the height direction
of the third yarn passage 38 is connected to the yarn running space 31.
[0040] A substantial left half of the surface on the one side in the height direction of
the interlacing piece 26 is an inclined surface 26a which is inclined relative to
the left-right direction so as to be a negative slope in the leftward direction if
it is assumed that the height direction is the vertical direction. A substantial right
half of the surface on the one side in the height direction of the interlacing piece
26 is an inclined surface 26b which is inclined relative to the left-right direction
so as to be a negative slope in the rightward direction if it is assumed that the
height direction is the vertical direction. As such, the inclined surfaces 26a and
26b are positioned on the respective sides of the first yarn passage 36 in the left-right
direction, and the yarn Y is guided by the inclined surfaces 26a and 26b and inserted
into the first yarn passage 36.
[0041] The injection passages 33 are provided for the respective yarn running spaces 31.
One injection passage 33 is formed for each interlacing piece 26 and extends in the
height direction. A leading end (end on the one side) of the injection passage 33
is an injection port 33a which is open to a wall surface of the junction between the
second yarn passage 37 and the third yarn passage 38, on the other side in the height
direction. The injection port 33a therefore opposes the yarn running space 31 across
the third yarn passage 38 in the height direction. A lower end portion of the injection
passage 33 is connected to a fluid supply source 40 via a fluid supply path 41. A
valve 39 is provided on the fluid supply path 41. When the valve 39 is opened, fluid
such as air supplied from the fluid supply source 40 is supplied to the injection
passage 33 via the fluid supply path 41, and is injected into the yarn running space
31 from the injection port 33a of the injection passage 33. As a result, a swirling
flow is generated in the yarn running space 31, and the filaments F forming the yarn
Y running in the yarn running space 31 are interlaced.
[0042] In the present embodiment, a combination of the injection passage 33, the fluid supply
source 40, the fluid supply path 41, and the valve 39 is equivalent to an injection
unit of the present invention.
[0043] The upstream yarn guides 22 are provided upstream of the interlacing portion 21 in
the yarn running direction and on the surface of the base 20 on the one side in the
height direction, and are lined up in the left-right direction. Each upstream yarn
guide 22 is a column extending in the height direction. The downstream yarn guides
23 are provided downstream of the interlacing portion 21 in the yarn running direction
and on the surface of the base 20 on the one side in the height direction, and are
lined up in the left-right direction. Each downstream yarn guide 23 is a column similar
to the upstream yarn guide 22. The upstream yarn guides 22 and the downstream yarn
guides 23 are substantially symmetrical in position in the left-right direction. Because
the yarn Y running in the yarn running direction passes between the neighboring upstream
yarn guides 22 and between the neighboring downstream yarn guides 23, the movement
of the yarn Y in the left-right direction is regulated, and the yarn path is defined.
The yarn guides 22 and 23 have a function of supporting the yarn Y when the yarn Y
is interlaced at the interlacing portion 21.
[0044] As described below, the yarn regulation bar 24 prevents the yarn Y from being introduced
into the yarn running space 31 at the time of yarn threading to the spun yarn take-up
apparatus 1. The yarn regulation bar 24 is a substantially columnar member which extends
in the left-right direction over the interlacing pieces 26 (the upstream yarn guides
22 and the downstream yarn guides 23) and has an axis extending in the left-right
direction. The yarn regulation bar 24 is cantilevered at a leading end portion of
a lever 42. The lever 42 is swingable about a shaft 43 extending in the left-right
direction, and is swung about the shaft 43 by a lever driver 51 (see FIG. 6). When
the yarns Y having been spun out are taken up in the spun yarn take-up apparatus 1,
as shown in FIG. 2 to FIG. 4, the yarn regulation bar 24 is positioned downstream
in the yarn running direction of the downstream yarn guides 23 and is on the other
side in the height direction of the yarn paths in the interlacing device 8. (Hereinafter,
this position may be referred to as a regulation cancellation position.) When the
yarn regulation bar 24 is at the regulation cancellation position, the yarn regulation
bar 24 does not interfere with the yarns Y and does not prevent the yarns Y from entering
the yarn running spaces 31.
[0045] As described below, the swing member 25 is provided to introduce the yarns Y into
the yarn running spaces 31. The swing member 25 is a long plate-shaped member. The
length of the swing member 25 is longer than the interlacing portion 21 in the left-right
direction. The swing member 25 is positioned between the interlacing portion 21 and
the upstream yarn guides 22 in the yarn running direction. The swing member 25 is
swingable about a shaft 44 which is to the left of the interlacing pieces 26 (the
upstream yarn guides 22 and the downstream yarn guides 23) and is parallel to the
yarn running direction. The swing member 25 is swung about the shaft 44 by a swing
member driver 52 (see FIG. 6). When the yarns Y having been spun out are taken up
in the spun yarn take-up apparatus 1, as shown in FIG. 2 to FIG. 5, the swing member
25 is postured so that the length thereof is substantially parallel to the height
direction, and is at a position out of the yarn paths of the interlacing device 8
(hereinafter, this position may be referred to as a pressing cancellation position).
The swing member 25 at the pressing cancellation position does not interfere with
the yarns Y running in the interlacing device 8.
[0046] In the present embodiment, as shown in FIG. 6, the controller 50 controls operations
of the lever driver 51, the swing member driver 52, and the valve 39 of the interlacing
device 8.
(Introduction of Yarns into Interlacing Device)
[0047] Now, a method of performing yarn threading to the spun yarn take-up apparatus 1 will
be described. In the spun yarn take-up apparatus 1, after yarn threading to the oil
supply guide 11, the heating roller of the drawing unit 5, and the take-up rollers
6 and 7 is performed, yarn threading to the interlacing device 8 (i.e., introduction
of the yarn into the yarn running space 31 and yarn threading to the yarn guides 22
and 23) is performed. Subsequently, yarn threading to the fulcrum guides 18b and the
bobbins B is performed.
[0048] Before the yarn threading to parts other than the interlacing device 8 in the spun
yarn take-up apparatus 1, the controller 50 controls the lever driver 51 to swing
the lever 42, with the result that the yarn regulation bar 24 is at a position (hereinafter,
this position may be referred to as a regulation position) which is on one side in
the height direction of the interlacing portion 21, as shown in FIG. 7 and FIG. 8.
Thereafter, the operator performs yarn threading to the parts other than the interlacing
device 8 in the spun yarn take-up apparatus 1. In so doing, the operator places the
yarns onto the yarn regulation bar 24. On this account, at the time of the yarn threading
to the parts other than the interlacing device 8 in the spun yarn take-up apparatus
1, yarn threading of the yarns Y to the interlacing device 8 (i.e., introduction of
the yarn into the yarn running space 31 and yarn threading to the yarn guides 22 and
23) is prohibited by the yarn regulation bar 24.
[0049] After the yarn threading to the parts other than the interlacing device 8 in the
spun yarn take-up apparatus 1 is completed, the controller 50 controls the lever driver
51 to swing the lever 42, with the result that the yarn regulation bar 24 returns
from the regulation position to the regulation cancellation position, as shown in
FIG. 9 and FIG. 10. Thereafter, the controller 50 controls the swing member driver
52 to swing the swing member 25 from the pressing cancellation position to a position
(hereinafter, this position may be referred to as a pressing completion position)
where the length of the swing member 25 is substantially parallel to the left-right
direction. Subsequently, the controller 50 controls the swing member driver 52 to
return the swing member 25 from the pressing completion position to the pressing cancellation
position.
[0050] When the yarn regulation bar 24 is returned to the regulation cancellation position,
the regulation of the yarns Y by the yarn regulation bar 24 is canceled, and the yarns
Y are threaded to the upstream yarn guides 22 and the downstream yarn guides 23 on
account of the tensions of the yarns Y. At this stage, a part of each yarn Y, which
is above the interlacing portion 21, moves on account of the tension T of itself.
The tension T is force exerted toward the yarn running space 31. As a result of this
movement of the yarns Y, all yarns Y may be introduced into the yarn running spaces
31. However, at least some of the yarns Y may be outside the yarn introduction passages
32 as they are caught on one of the inclined surfaces 26a and 26b, or may be caught
in the yarn introduction passages 32.
[0051] Thereafter, when the swing member 25 is moved from the pressing cancellation position
to the pressing completion position, the yarns Y are pressed by the swing member 25.
In this connection, before reaching the pressing completion position, the swing member
25 makes contact with and presses the yarns Y, while the length of the swing member
25 is inclined relative to the left-right direction. On this account, as shown in
FIG. 11(a) to FIG. 11(d), the pressing force E with which the swing member 25 presses
the yarn Y includes a component E1 (hereinafter, a component E1 in the height direction)
exerted from the one side to the other side in the height direction and a component
E2 (hereinafter, a component E2 in the left-right direction) exerted from the left
side to the right side.
[0052] Therefore, as shown in FIG. 11(a), when pressed by the swing member 25, the yarn
Y outside the yarn introduction passage 32 is inserted into the first yarn passage
36 through the insertion slot 36a, mainly on account of the component E1 in the height
direction of the pressing force E. Furthermore, as shown in FIG. 11(b), when pressed
by the swing member 25, the yarn Y inside the first yarn passage 36 is moved to the
junction between the first yarn passage 36 and the second yarn passage 37, mainly
on account of the component E1 in the height direction of the pressing force E.
[0053] Furthermore, as shown in FIG. 11(c), when pressed by the swing member 25, the yarn
Y either at the junction between the first yarn passage 36 and the second yarn passage
37 or in the second yarn passage 37 is moved to the junction between the second yarn
passage 37 and the third yarn passage 38, on account of the component E2 in the left-right
direction of the pressing force E and the tension T.
[0054] Furthermore, as shown in FIG. 11(d), when pressed by the swing member 25, the yarn
Y in the third yarn passage 38 and the yarn running space 31 is moved to the junction
between the second yarn passage 37 and the third yarn passage 38, mainly on account
of the component E1 in the height direction of the pressing force E.
[0055] In this way, when the swing member 25 reaches the pressing completion position, all
yarns Y have been moved to the junction between the second yarn passage 37 and the
third yarn passage 38 as shown in FIG. 11(d).
[0056] Thereafter, the pressing of the yarns Y by the swing member 25 is canceled as the
swing member 25 is returned from the pressing completion position to the pressing
cancellation position. As a result, the yarn Y having been moved to the junction between
the second yarn passage 37 and the third yarn passage 38 is moved to the one side
in the height direction in the third yarn passage 38 on account of the tension T of
itself, and is introduced into the yarn running space 31.
(Advantageous Effects)
[0057] As described above, when the regulation by the yarn regulation bar 24 is canceled
after yarn threading to parts other than the interlacing device 8 of the spun yarn
take-up apparatus 1 is performed, the yarns Y may be introduced into the yarn running
spaces 31 on account of their tensions, but some of the yarn Y may not be introduced
into the yarn running spaces 31 because, for example, they are not inserted into the
yarn introduction passages 32 or caught in the yarn introduction passages 32. For
this reason, in the present embodiment, the yarns Y are pressed by the swing member
25 after the cancelation of the regulation by the yarn regulation bar 24, and then
the pressing of the yarns Y by the swing member 25 is canceled. This causes all yarns
Y to be introduced into the yarn running spaces 31.
[0058] In the present embodiment, the yarn introduction passage 32 includes the first yarn
passage 36 extending in the height direction, the second yarn passage 37 connected
to the first yarn passage 36 and extending in the left-right direction, and the third
yarn passage 38 connected to the second yarn passage 37 and extending in the height
direction. On this account, to reach the yarn running space 31, the yarn Y is required
to move in the first yarn passage 36 in the height direction and then change the moving
direction and move in the second yarn passage 37 in the left-right direction, and
further change the moving direction and move in the third yarn passage 38 in the height
direction. The yarn Y is therefore likely to be caught before reaching the yarn running
space 31 if the yarn Y is moved solely by the tension of itself.
[0059] In this regard, in the present embodiment, as the yarn Y is pressed by the swing
member 25, pressing force E having the component E1 in the height direction and the
component E2 in the left-right direction is applied to the yarn Y. With this arrangement,
as described above, the yarn Y pressed by the swing member 25 moves in the first yarn
passage 36 and in the second yarn passage 37 in order, and reaches the junction between
the second yarn passage 37 and the third yarn passage 38. Thereafter, as the pressing
of the yarn Y by the swing member 25 is canceled, the yarn Y moves in the third yarn
passage 38 and reaches the yarn running space 31, on account of the tension of itself.
[0060] In regard to the above, in the present embodiment, because one swing member 25 exerts
the pressing force E having the component E1 in the height direction and the component
E2 in the left-right direction to the yarn Y, the structure of the interlacing device
8 is simple as compared to cases where a member which presses the yarn Y in the height
direction to insert the yarn Y into the first yarn passage 36 and a moving member
which presses the yarn Y in the left-right direction to move the yarn Y in the left-right
direction are independently provided.
[0061] In the present embodiment, as the yarn Y is pressed by the swing member 25 which
is swung about the shaft 44, the pressing force E having a component E1 in the height
direction and a component E2 in the left-right direction can be applied to the yarn
Y by a simple structure. In this connection, because the shaft 44 is parallel to the
yarn running direction, the length of a space required to swing the swing member 25
is short in the yarn running direction, and hence the interlacing device 8 is downsized
in the yarn running direction.
[0062] In addition to the above, when the swing member 25 presses a running yarn Y, a pressed
part of the yarn Y is temporarily restricted. On this account, a part downstream of
the pressed part of the yarn Y temporarily has increased tension, with the result
that the yarn path becomes stable. Meanwhile, a part upstream of the pressed part
of the yarn Y temporarily has decreased tension and is slackened, with the result
that the yarn path becomes unstable. For this reason, in the present embodiment, the
swing member 25 is provided upstream of the interlacing portion 21 in the yarn running
direction. With this arrangement, a yarn part with a stable yarn path, which is downstream
of a part of the yarn pressed by the swing member 25 in the yarn running direction,
is introduced into the interlacing portion 21. The yarn Y is therefore easily introduced
into the interlacing portion 21, as compared to cases where the swing member 25 is
provided downstream of the interlacing portion 21.
[0063] Being different from the present embodiment, assume that the swing member 25 is provided
upstream of the upstream yarn guides 22 in the yarn running direction. In such a case,
because the upstream yarn guides 22 are provided between the swing member 25 and the
interlacing portion 21, the movement of a part of the yarn Y running at the interlacing
portion 21 may be obstructed by the upstream yarn guide 22 when the yarn Y is pressed
by the swing member 25.
[0064] In this regard, in the present embodiment, the swing member 25 is provided between
the interlacing portion 21 and the upstream yarn guides 22 in the yarn running direction.
On this account, the movement of the yarn Y in the interlacing portion 21 is not obstructed
by the upstream yarn guide 22 when the yarn Y is pressed by the swing member 25.
[0065] A preferred embodiment of the present invention has been described. It should be
noted that the present invention is not limited to the above-described embodiment,
and various changes, substitutions, and alterations can be made herein without departing
from the spirit and scope of the invention as defined by the appended claims.
[0066] While in the embodiment above the upstream yarn guides 22 are provided upstream of
the interlacing portion 21 in the yarn running direction and the swing member 25 is
provided between the upstream yarn guides 22 and the interlacing portion 21, the disclosure
is not limited to this arrangement. For example, when the interlacing device 8 includes
only the downstream yarn guides 23 among the upstream yarn guides 22 and the downstream
yarn guides 23, the swing member 25 may be provided upstream of the interlacing portion
21 in the yarn running direction.
[0067] While in the embodiment above the swing member 25 is provided upstream of the interlacing
portion 21 in the yarn running direction, the disclosure is not limited to this arrangement.
For example, the swing member 25 may be provided downstream of the interlacing portion
21 in the yarn running direction. Alternatively, swing members 25 are provided both
upstream and downstream of the interlacing portion 21 in the yarn running direction.
[0068] When the swing member 25 is provided downstream of the interlacing portion 21 in
the yarn running direction, if the interlacing device 8 includes a plurality of downstream
yarn guides 23 as in the embodiment above, the swing member 25 may be provided between
the interlacing portion 21 and the downstream yarn guides 23 in the yarn running direction.
With this arrangement, the movement of the yarn Y in the interlacing portion 21 is
not obstructed by the downstream yarn guide 23 when the yarn Y is pressed by the swing
member 25.
[0069] While in the embodiment above the swing member 25 is swingable about the shaft 44
which is parallel to the yarn running direction, the disclosure is not limited to
this arrangement. The swing member 25 may be swingable about a shaft which is slightly
inclined relative to the yarn running direction.
[0070] While in the embodiment above the yarn Y is pressed by the swingable swing member
25, the disclosure is not limited to this arrangement. For example, the yarn Y may
be pressed by a member (the common member of the present invention) which moves in
a parallel manner in a direction orthogonal to the yarn running direction and intersecting
with the height direction and the left-right direction. Also in this case, pressing
force having a component in the height direction and a component in the left-right
direction can be applied to the yarn Y.
[0071] While, in the embodiment above, force having a component in the height direction
and a component in the left-right direction is applied to the yarn Y by one swing
member 25, the disclosure is not limited to this arrangement. For example, in the
embodiment above, an insertion member which presses the yarn Y in the height direction
to insert the yarn Y into the first yarn passage 36 through the insertion slot 36a
and a movement member which presses, in the left-right direction, the yarn Y inserted
into the first yarn passage 36 to move the yarn Y in the left-right direction along
the second yarn passage 37 may be independently provided instead of the swing member.
The insertion member is, for example, a long member which extends parallel to the
left-right direction and over the interlacing pieces 26, and moves in a parallel manner
in the height direction. The movement member may be a comb-teeth member, for example.
Alternatively, at least one set of the yarn guides 22 and 23 may be arranged to be
movable in the left-right direction as a movement member.
[0072] In addition to the above, the yarn Y may not be pressed by force having a component
in the height direction and a component in the left-right direction. For example,
a movement member for moving the yarn Y in the left-right direction may not be provided
when an insertion member pressing the yarn Y in the height direction to insert the
same into the first yarn passage is provided. In this case, a yarn Y which is not
inserted into the first yarn passage and a yarn Y caught in the first yarn passage
are pressed by the insertion member and moved to the junction between the first yarn
passage and the second yarn passage. With this arrangement, thereafter, movement of
the yarn Y along the second yarn passage on account of its tension is facilitated.
The yarn Y is therefore likely to be introduced into the yarn running space 31 as
compared to cases where no insertion member is provided.
[0073] While in the embodiment above the second yarn passage 37 extends to be parallel to
the left-right direction orthogonal to the height direction in which the first yarn
passage 36 extends, the disclosure is not limited to this arrangement. The second
yarn passage 37 may extend in a direction which is orthogonal to the running direction
in the interlacing device 8 and is inclined relative to the left-right direction.
[0074] While in the embodiment above the yarn introduction passage 32 through which the
yarn is introduced into the yarn running space 31 includes the first yarn passage
36, the second yarn passage 37, and the third yarn passage 38, the disclosure is not
limited to this arrangement.
[0075] For example, according to a modification, an interlacing device 101 is formed of
interlacing pieces 102 lined up in the left-right direction, as shown in FIG. 12.
The interlacing device 101 includes yarn running spaces 103, yarn introduction passages
104, and injection passages 105.
[0076] The yarn running space 103 is substantially elliptical in shape and is long in the
height direction when viewed in the yarn running direction. The yarn introduction
passage 104 includes a first yarn passage 106 and a second yarn passage 107. The first
yarn passage 106 is a gap between two neighboring interlacing pieces 102. The first
yarn passage 106 extends in the height direction, and one end in the height direction
of the first yarn passage 106 is an insertion slot 106a from which the yarn Y is inserted.
The second yarn passage 107 is connected to the other end of the first yarn passage
106 in the height direction, extends rightward from the junction with the first yarn
passage 106, and is connected to the yarn running space 103 at the right end.
[0077] The injection passage 105 is formed in each interlacing piece 102 and extends in
the height direction. At an upper end portion of the injection passage 105, an injection
port 105a is formed to open in the left inner wall surface of the first yarn passage
106. With this arrangement, the injection port 105a of each interlacing piece 102
opposes, in the left-right direction, the yarn running space 103 of the interlacing
piece 102 which is directly to the right of the each interlacing piece 102. The injection
passage 105 is connected to a fluid supply source 109 via a fluid supply path 108.
A valve 110 is provided on the fluid supply path 108. When the valve 110 is opened,
fluid such as air supplied from the fluid supply source 109 is injected into the yarn
running space 103 from the injection port 105a. As a result, a swirling flow is generated
in the yarn running space 103, and the yarn Y is interlaced.
[0078] In this interlacing device 101, as the controller 50 controls the swing member driver
52 to swing the swing member 25 from the pressing cancellation position to the pressing
completion position, pressing force including a component in the height direction
and a component in the left-right direction is exerted to the yarn Y. Therefore, when
pressed by the swing member 25, the yarn Y outside the yarn introduction passage 104
is inserted into the first yarn passage 106 through the insertion slot 106a, mainly
on account of the component in the height direction of the pressing force. Furthermore,
when pressed by the swing member 25, the yarn Y inside the first yarn passage 106
is moved in the first yarn passage 106 and reaches the junction with the second yarn
passage 107, mainly on account of the component in the height direction of the pressing
force. Furthermore, when pressed by the swing member 25, the yarn Y inside the second
yarn passage 107 is moved in the second yarn passage 107 and reaches the yarn running
space 103, mainly on account of the component in the left-right direction of the pressing
force.
[0079] Alternatively, the yarn introduction passage may include only the first yarn passage,
and the first yarn passage may be directly connected to the yarn running space. In
this case, as the yarn Y is pressed in the height direction, the yarn Y is introduced
into the yarn running space via the first yarn passage. In this case, a movement member
for moving the yarn Y in the left-right direction is unnecessary, when an insertion
member pressing the yarn Y in the height direction to insert the same into the first
yarn passage is provided.