U.S. patent application number 12/162542 was filed with the patent office on 2009-02-12 for yarn traverse guide.
This patent application is currently assigned to TORAY INDUSTRIES, INC. Invention is credited to Yusuke Hamabe, Yasunori Ota.
Application Number | 20090039189 12/162542 |
Document ID | / |
Family ID | 38309145 |
Filed Date | 2009-02-12 |
United States Patent
Application |
20090039189 |
Kind Code |
A1 |
Ota; Yasunori ; et
al. |
February 12, 2009 |
YARN TRAVERSE GUIDE
Abstract
A yarn traverse guide in which a plurality of yarn guides having
yarn introducing openings and yarn introducing passages formed
continuously from the yarn introducing openings are disposed at
intervals so that the positions of the yarn introducing openings
are not overlapped with each other.
Inventors: |
Ota; Yasunori; (Ehime,
JP) ; Hamabe; Yusuke; (Ehime, JP) |
Correspondence
Address: |
RATNERPRESTIA
P.O. BOX 980
VALLEY FORGE
PA
19482
US
|
Assignee: |
TORAY INDUSTRIES, INC
CHUO-KU
JP
|
Family ID: |
38309145 |
Appl. No.: |
12/162542 |
Filed: |
January 23, 2007 |
PCT Filed: |
January 23, 2007 |
PCT NO: |
PCT/JP2007/050948 |
371 Date: |
July 29, 2008 |
Current U.S.
Class: |
242/157.1 |
Current CPC
Class: |
B65H 57/14 20130101;
B65H 57/006 20130101; B65H 57/04 20130101 |
Class at
Publication: |
242/157.1 |
International
Class: |
B65H 57/28 20060101
B65H057/28 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 30, 2006 |
JP |
2006-020201 |
Claims
1. A yarn traverse guide comprising (a) a first guide member
forming a first yarn guide, (b) a second guide member forming a
second yarn guide, and (c) a guide attaching member for fixing said
first guide member and said second guide member, wherein (d) said
first guide member has a first yarn introducing port formed in a
peripheral segment thereof and a first yarn introducing passage
extending from said first yarn introducing port to inward of said
yarn introducing port, (e) said second guide member has a second
yarn introducing port formed in a peripheral segment thereof and a
second yarn introducing passage extending from said second yarn
introducing port to inward of said yarn introducing port, and (f)
said first yarn guide and said second yarn guide are fixed to said
guide attaching member in facing to each other through a clearance
between them in such a state that when said first yarn introducing
port and said second yarn introducing port are projected on the
same plane of projection, they do not overlap each other and in
such a state that when said first yarn introducing passage and said
second yarn introducing passage are projected on the same plane of
projection, they overlap each other at least partially.
2. A yarn traverse guide, according to claim 1, wherein an angle
formed between a first direction in which a center line of said
first yarn introducing passage extends from said first yarn
introducing port to outward of said first guide member and a second
direction in which a center line of said second yarn introducing
passage extends from said second yarn introducing port to outward
of said second guide member is more than 0 degree to less than 180
degrees on said same plane of projection.
3. A yarn traverse guide, according to claim 2, wherein at least
either the center line of said first yarn introducing passage or
the center line of said second yarn introducing passage is
straight.
4. A yarn traverse guide, according to claim 2, wherein at least
one of said first yarn introducing passage and said second yarn
introducing passage communicates, at its end, with a yarn
introducing passage extension extending in a direction different
from a direction of the center line of the at least one of the
first yarn introducing passage and the second yarn introducing
passage.
5. A yarn traverse guide, according to claim 2, wherein the
peripheral segment including said yarn introducing port of the at
least one of said first guide member and said second guide member
is formed to be curved outward of the at least one of the first
guide member and the second guide member.
6. A yarn traverse guide, according to claim 2, wherein each of
said first guide member and said second guide member is a
plate-like body.
7. A yarn traverse guide, according to claim 2, wherein either said
first guide member or said second guide member is a plate-like body
while the other of said first guide member or said second guide
member comprises two bars parallel to each other.
8. A yarn traverse guide, according to claim 7, wherein each of
said two bars is a rotatable roller.
9. A yarn traverse guide, according to claim 8, wherein the yarn
introducing passage of said plate-like body communicates, at its
end, with a yarn introducing passage extension extending in a
direction different from the direction of the center line of said
yarn introducing passage; and in the case where said yarn
introducing passage extension and the yarn introducing passage
formed between said rotatable rollers are projected on the same
plane of projection, they agree with each other in direction.
10. A yarn traverse guide comprising: guide members each having a
yarn introducing port formed in a peripheral segment thereof and a
yarn introducing passage extending from said yarn introducing port
inwardly from said peripheral segment; a guide attaching member
fixing the guide members such that they face each other with a
clearance between them; wherein when said yarn introducing ports of
said guide members are projected on a plane of projection, they do
not overlap each other; and wherein when said yarn introducing
passages of said guide members are projected on the same plane of
projection, they overlap each other at least partially.
11. A yarn traverse guide, according to claim 10, wherein an angle
formed between a center line of each of said yarn introducing
passages extending from each of said yarn introducing ports
outwardly is more than 0 degree to less than 180 degrees.
12. A yarn traverse guide, according to claim 11, wherein a center
line of at least one of said yarn introducing passages is
substantially straight.
13. A yarn traverse guide, according to claim 11, wherein at least
one of said yarn introducing passages communicates, at its end,
with a yarn introducing passage extension extending in a direction
different from a direction of the center line of the at least one
of the yarn introducing passages.
14. A yarn traverse guide, according to claim 11, wherein the
peripheral segment including said yarn introducing port of at least
one of said guide members is formed to be curved outwardly of the
at least one guide member.
15. A yarn traverse guide, according to claim 11, wherein each of
said guide members is a plate-like body.
16. A yarn traverse guide, according to claim 11, wherein one of
said guide members is a plate-like body while the other of said
guide members comprises two bars parallel to each other.
17. A yarn traverse guide, according to claim 16, wherein each of
said two bars is a rotatable roller.
18. A yarn traverse guide, according to claim 17, wherein the yarn
introducing passage of said plate-like body communicates, at its
end, with a yarn introducing passage extension extending in a
direction different from the direction of the center line of said
yarn introducing passage; and in the case where said yarn
introducing passage extension and the yarn introducing passage
formed between said rotatable rollers are projected on the same
plane of projection, they agree with each other in direction.
Description
TECHNICAL FIELD
[0001] The present invention relates to a yarn traverse guide used
in a yarn winder that winds a running yarn around a rotating bobbin
while traversing the yarn.
BACKGROUND ART
[0002] A yarn winder for winding a running yarn around a rotating
bobbin while traversing the yarn comprises a yarn traverse guide
for guiding and traversing the running yarn in the axial direction
of the bobbin. As one of yarn traverse guides, known is a yarn
traverse guide having two free rollers (free rotating rollers)
disposed in parallel to each other through a clearance between
them, for controlling the running of a yarn against the force
acting on the yarn in the yarn running direction (tension) and the
force acting on the yarn in the traverse direction.
[0003] In this yarn traverse guide, the yarn running toward the
winding bobbin passes through the clearance between the two free
rollers, and the two free rollers are traversed in the axial
direction of the winding bobbin, to traverse the running yarn in
the axial direction of the winding bobbin while the yarn is wound
around the winding bobbin.
[0004] However, this yarn traverse guide has a problem that the
operation of introducing the yarn into the yarn traverse guide is
very difficult. To address this problem, a yarn traverse guide
comprising a ring guide and two free rollers disposed in parallel
to each other through a clearance between them is proposed in
Patent Document 1. The ring guide has an opening communicating from
outside to inside the ring guide at the position corresponding to
the clearance between the two free rollers. The yarn is introduced
from the opening into the clearance between the two free
rollers.
[0005] This conventional technique has greatly improved the
convenience of introducing the yarn into the yarn traverse guide.
However, with this conventional technique, if the force in the yarn
running direction or the force in the direction crossing the yarn
running direction but different from the traverse direction
(hereinafter this direction is merely called the direction
different from the traverse direction) acts on the yarn, the
position control of the running yarn by the yarn traverse guide
cannot be performed. That is, the conventional technique has a
disadvantage that the yarn can deviate from the yarn traverse
guide, not being able to be traversed any more.
[0006] In recent years, especially a turret (revolving) type yarn
winder as proposed in Patent Document 2 is popularly used. With the
turret (revolving) type yarn winder, in the turret (revolving)
movement or yarn cutting by a cutter when the yarn is transferred
from a fully loaded bobbin to an empty bobbin, the yarn deviates
from the yarn traverse guide, since the force in the axial
direction of the free rollers acts on the yarn. If this phenomenon
occurs, there arise such problems that the yarn deviating from the
yarn traverse guide and running toward the fully loaded bobbin is
kept in sliding contact with the frame of the winder, to be damaged
and that the cutting of the yarn by the cutter for transferring the
yarn to an empty bobbin cannot be performed.
[0007] On the other hand, Patent Document 3 proposes a yarn
traverse guide capable of relatively stably controlling the yarn
passage, namely, a yarn traverse guide that allows stable yarn
traversing without causing the yarn to deviate from the yarn
traverse guide even if the force in the yarn traveling direction
and the force in the direction different from the traverse
direction act on the yarn.
[0008] In this yarn traverse guide, a yarn disengagement prevention
hook crossing a yarn arresting groove formed near a yarn guide
portion is provided near the opening of the yarn arresting groove.
If this yarn traverse guide is used, the yarn can be stably
traversed without deviating from the yarn traverse guide even if
the force in the yarn running direction and the force in the
direction different from the traverse direction act on the yarn.
However, the yarn traverse guide has a problem that the operation
of introducing the yarn into the yarn traverse guide is difficult,
since the yarn disengagement prevention hook is obtrusive.
[0009] Patent Document 1: JP 58-123862 U
[0010] Patent Document 2: JP 05-193835 A
[0011] Patent Document 3: JP 02-132069 U
DISCLOSURE OF THE INVENTION
Problems to be Solved by the Invention
[0012] The object of the invention is to provide a yarn traverse
guide for solving the abovementioned problems of the prior art.
That is, the object of the invention is to provide a yarn traverse
guide that allows the yarn passage to be stably controlled against
not only the force in the yarn running direction but also the force
in the direction different from the traverse direction and also
allows easy yarn threading.
Means for Solving the Problems
[0013] The yarn traverse guide of the invention for achieving the
abovementioned object is as follows.
[0014] A yarn traverse guide comprising
[0015] (a) a first guide member forming a first yarn guide,
[0016] (b) a second guide member forming a second yarn guide,
and
[0017] (c) a guide attaching member for fixing the first guide
member and the second guide member,
[0018] wherein
[0019] (d) the first guide member has a first yarn introducing port
formed in a peripheral segment thereof and a first yarn introducing
passage extending from the first yarn introducing port to inward of
the first guide member,
[0020] (e) the second guide member has a second yarn introducing
port formed in a peripheral segment thereof and a second yarn
introducing passage extending from the first yarn introducing port
to inward of the second guide member, and
[0021] (f) the first yarn guide and the second yarn guide are fixed
to the guide attaching member in facing to each other through a
clearance between them in such a state that when the first yarn
introducing port and the second yarn introducing port are projected
on the same plane of projection, they do not overlap each other and
in such a state that when the first yarn introducing passage and
the second yarn introducing passage are projected on the same plane
of projection, they overlap each other at least partially.
[0022] In the yarn traverse guide of the invention, it is preferred
that the angle formed between the first direction in which the
center line of the first yarn introducing passage extends from the
first yarn introducing port to outward of the first guide member
and the second direction in which the center line of the second
yarn introducing passage extends from the second yarn introducing
port to outward of the second guide member is more than 0 degree to
less than 180 degrees on the same plane of projection.
[0023] In the yarn traverse guide of the invention, it is preferred
that at least either the center line of the first yarn introducing
passage or the center line of the second yarn introducing passage
is straight.
[0024] In the yarn traverse guide of the invention, it is preferred
that the first yarn introducing passage and/or the second yarn
introducing passage communicate(s), at their/its end(s), with a
yarn introducing passage extension(s) extending in the direction(s)
different from the direction(s) of the center line(s) of the yarn
introducing passage(s) concerned.
[0025] In the yarn traverse guide of the invention, it is preferred
that the peripheral segment(s) including the yarn introducing
port(s) of the first guide member and/or the second guide member
are/is formed to be curved outward of the first guide member and/or
the second guide member.
[0026] In the yarn traverse guide of the invention, it is preferred
that each of both the first guide member and the second guide
member is a plate-like body.
[0027] In the yarn traverse guide of the invention, it is preferred
that either the first guide member or the second guide member is a
plate-like body while the other guide member comprises two bars
parallel to each other.
[0028] In the yarn traverse guide of the invention, it is preferred
that each of the two bars is a rotatable roller (free roller).
[0029] In the yarn traverse guide of the invention, it is preferred
that the yarn introducing passage of the plate-like body
communicates at its end with a yarn introducing passage extension
extending in the direction different from the direction of the
center line of the yarn introducing passage, and that in the case
where the yarn introducing passage extension and the yarn
introducing passage formed between the rotatable rollers are
projected on the same plane of projection, they agree with each
other in direction.
EFFECTS OF THE INVENTION
[0030] In the yarn traverse guide of the invention, even in the
case where the force in the yarn running direction and the force in
the direction different from the traverse direction act on the
yarn, the yarn does not deviate from the yarn traverse guide, and
the state where the yarn is stably arrested by the yarn traverse
guide can be sustained. The yarn traverse guide of the invention
allows the yarn to be easily threaded (introduced) into the yarn
traverse guide. The yarn traverse guide of the invention can be
suitably used in a yarn winder such as a turret (revolving) type
yarn winder, in which the force in the yarn running direction and
the force in the direction different from the traverse direction
act on the yarn during the automatic transfer of the yarn from a
fully loaded bobbin to an empty bobbin, though such forces do not
act on the yarn in the steady winding state.
BRIEF DESCRIPTION OF THE DRAWINGS
[0031] FIG. 1 is a schematic top view showing a first yarn guide in
an embodiment of the yarn traverse guide of the invention.
[0032] FIG. 2 is a schematic top view showing a second yarn guide
in the embodiment of the yarn traverse guide of the invention, used
in combination with the first yarn guide of FIG. 1.
[0033] FIG. 3 is a schematic top view showing the embodiment of the
yarn traverse guide of the invention, using the combination
comprising the first yarn guide of FIG. 1 and the second yarn guide
of FIG. 2.
[0034] FIG. 4 is a schematic front view showing the yarn traverse
guide of FIG. 3.
[0035] FIG. 5 is a schematic side view showing a portion of a yarn
winder to which the yarn traverse guide of FIG. 3 is attached.
[0036] FIG. 6 is a schematic front view showing the yarn winder of
FIG. 5, in which the yarn traverse guide is located almost at the
center of the traverse width.
[0037] FIG. 7 is a schematic front view showing the yarn winder of
FIG. 5, in which the yarn traverse guide is located at the left end
of the traverse width.
[0038] FIG. 8 is a schematic front view showing the yarn winder of
FIG. 5, in which the yarn traverse guide is located at the right
end of the traverse width.
[0039] FIG. 9 is a schematic top view showing a first yarn guide in
another embodiment of the yarn traverse guide of the invention.
[0040] FIG. 10 is a schematic top view showing a second yarn guide
in the other embodiment of the yarn traverse guide of the
invention, used in combination with the first yarn guide of FIG.
9.
[0041] FIG. 11 is a schematic top view showing the other embodiment
of the yarn traverse guide of the invention, using the combination
comprising the first yarn guide of FIG. 9 and the second yarn guide
of FIG. 10.
[0042] FIG. 12 is a schematic front view showing the yarn traverse
guide of FIG. 11.
[0043] FIG. 13 is a schematic side view showing a portion of a yarn
winder to which the yarn traverse guide of FIG. 11 is attached.
[0044] FIG. 14 is a schematic front view showing the yarn winder of
FIG. 13, in which the yarn traverse guide is located almost at the
center of the traverse width.
[0045] FIG. 15 is a schematic front view showing the yarn winder of
FIG. 14, in which the yarn traverse guide is located at the left
end of the traverse width.
[0046] FIG. 16 is a schematic front view showing the yarn winder of
FIG. 14, in which the yarn traverse guide is located at the right
end of the traverse width.
MEANINGS OF SYMBOLS
[0047] A: first guide member [0048] B: second guide member [0049]
C: first guide member [0050] D: second guide member [0051] TG1:
yarn traverse guide [0052] TG2: yarn traverse guide [0053] YW1:
yarn winder [0054] YW2: yarn winder [0055] a1: first yarn
introducing passage extension (yarn holding passage) [0056] a2:
second yarn introducing passage extension (yarn holding passage)
[0057] a3: first yarn introducing passage extension (yarn holding
passage) [0058] b1: first yarn introducing passage [0059] b1c:
center line [0060] b2: second yarn introducing passage [0061] b2c:
center line [0062] b3: first yarn introducing passage [0063] b3c:
center line [0064] b4: second yarn introducing passage [0065] b4c:
center line [0066] c1: first yarn introducing port [0067] c2:
second yarn introducing port [0068] c3: first yarn introducing port
[0069] c4: second yarn introducing port [0070] d1: angle [0071] d2:
angle [0072] e: clearance [0073] 1: yarn [0074] 1a: yarn [0075] 2:
traverse guide rail [0076] 2a: traverse guide rail [0077] 3:
pressure roller [0078] 3a: pressure roller [0079] 4: yarn package
[0080] 4a: yarn package [0081] 5: winding bobbin [0082] 5a: winding
bobbin [0083] 6a: bar (free roller) [0084] 6b: bar (free roller)
[0085] 7: guide attaching member (guide support) [0086] 7a: guide
attaching member (guide support) [0087] 11a: peripheral segment
[0088] 11b: peripheral segment [0089] 12a: peripheral segment
[0090] 12b: peripheral segment [0091] 13a: guide member attaching
portion [0092] 13b: guide member attaching portion [0093] 14a:
screw hole [0094] 14b: screw hole [0095] 15a: screw [0096] 15b:
screw. [0097] 16a: first direction [0098] 16b: second direction
[0099] 20: space portion [0100] 21a: peripheral segment [0101] 22a:
peripheral segment [0102] 23a: guide member attaching portion
[0103] 23b: guide member attaching portion [0104] 24a: screw hole
[0105] 24b: screw hole [0106] 25a: screw [0107] 25b: screw [0108]
26a: first direction [0109] 26b: second direction
THE BEST MODES FOR CARRYING OUT THE INVENTION
[0110] Embodiments of the yarn traverse guide of the invention are
explained below in reference to the drawings.
[0111] The yarn traverse guide of the invention comprises a first
guide member forming a first yarn guide, a second guide member
forming a second yarn guide, and a guide attaching member for
fixing these yarn guides in certain positional relationships. FIGS.
1 through 4 show an embodiment of the yarn traverse guide of the
invention.
[0112] FIG. 1 is a top view showing a first guide member A forming
a first yarn guide. In FIG. 1, the first guide member A is formed
as a semi-circular plate-like body. The first guide member A has a
first yarn introducing port c1 formed in a portion of a
semi-circular peripheral segment 11a and a first yarn introducing
passage b1 extending from the first yarn introducing port c1 to
inward of the first guide member A. The first yarn introducing port
c1 and the first yarn introducing passage b1 communicating with it
are formed with a slit provided in the plate-like body.
[0113] The straight peripheral segment 12a of the first guide
member A is bent upward to form a guide member attaching portion
13a. The guide member attaching portion 13a has screw holes 14a
used for attaching.
[0114] The yarn passage of the yarn is formed in the direction from
the top side of the first guide member A toward the bottom side, or
in the direction from the bottom side toward the top side. For
threading the yarn into the first yarn guide, the yarn is
introduced from the first yarn introducing port c1 into the first
yarn introducing passage b1.
[0115] In the first guide member A, the first yarn introducing
passage b1 communicates, at its end, with a first yarn introducing
passage extension (yarn holding passage) a1 extending in the
direction different from the direction of the center line of the
first yarn introducing passage b1. In FIG. 1, the center line of
the first yarn introducing passage b1 is straight, but the center
line can also be curved. In the case of a curve, it is preferred
that the curve is smoothly bent, since the yarn moves along the
first yarn introducing passage b1 while it runs in the vertical
direction.
[0116] FIG. 2 is a top view showing a second guide member B forming
a second yarn guide. In FIG. 2, the second guide member B is formed
as a semi-circular plate-like body. The second guide member B has a
second yarn introducing port c2 formed in a portion of a
semi-circular peripheral segment 11b and a second yarn introducing
passage b2 extending from the second yarn introducing port c2 to
inward of the second guide member B. The second yarn introducing
port c2 and the second yarn introducing passage b2 communicating
with it are formed as a slit in the plate-like body.
[0117] The straight peripheral segment 12b of the second guide
member B is bent downward to form a guide member attaching portion
13b. The guide member attaching portion 13b has screw holes 14b
used for attaching.
[0118] The yarn passage of the yarn is formed in the direction from
the top side of the second guide member B toward the bottom side,
or in the direction from the bottom side toward the top side. For
threading the yarn into the second yarn guide, the yarn is
introduced from the second yarn introducing port c2 into the second
yarn introducing passage b2.
[0119] In the second guide member B, the second yarn introducing
passage b2 communicates, at its end, with a second yarn introducing
passage extension (yarn holding passage) a2 extending in the
direction different from the direction of the center line of the
second yarn introducing passage b2. In FIG. 2, the center line of
the second yarn introducing passage b2 is straight, but the center
line can also be curved. In the case of a curve, it is preferred
that the curve is smoothly bent, since the yarn moves along the
second yarn introducing passage b2 while it runs in the vertical
direction.
[0120] FIG. 3 is a schematic top view showing an embodiment of the
yarn traverse guide of the invention, using the combination
comprising the first yarn guide of FIG. 1 and the second yarn guide
of FIG. 2. FIG. 4 is a schematic front view showing the yarn
traverse guide of FIG. 3. In FIGS. 3 and 4, the yarn traverse guide
TG1 comprises the first guide member A forming the first yarn
guide, the second guide member B forming the second yarn guide, and
a guide attaching member (guide support) 7 fixing these
members.
[0121] In the upper portion of the guide support 7, the first guide
member A is fixed to the guide support 7 by the screws 15a inserted
into the screw holes 14a formed in the guide member attaching
portion 13a. In the lower portion of the guide support 7, the
second guide member B is fixed to the guide support 7 by the screws
15b inserted in the screw holes 14b formed in the guide member
attaching portion 13b, in facing to the first guide member A, with
a clearance e formed against the first guide member A.
[0122] The first guide member A and the second guide member B are
fixed to the guide support 7 in such a manner as to establish the
following three positional relationships.
[0123] The first positional relationship is such that when the
first yarn introducing port c1 and the second yarn introducing port
c2 are projected on the same plane of projection, they do not
overlap each other. In this positional relationship, it can be
prevented that the running yarn traversed by the yarn traverse
guide TG1 deviates from the yarn traverse guide TG1 during
traversing.
[0124] The second positional relationship is such that when the
first yarn introducing passage b1 and the second yarn introducing
passage b2 are projected on the same plane of projection, they
overlap each other at least partially. In this positional
relationship, the running yarn traversed can pass through the yarn
traverse guide TG1 straight in the steady state of traversing.
[0125] The third positional relationship is such that the first
guide member A and the second guide member B keep a clearance e
between them. In this positional relationship, the yarn can be
easily threaded into the yarn traverse guide TG1. That is, this
positional relationship facilitates the introduction of the yarn
from the first yarn introducing port c1 of the first guide member A
into the first yarn introducing passage b1 and the introduction of
the yarn from the second yarn introducing port c2 of the second
guide member B into the second yarn introducing passage b2.
[0126] The dimension of the clearance e is selected, considering
the thickness of the wound yarn, etc., and it is preferred that the
dimension is in the range of 1 mm to 50 mm. A more preferred range
is 5 mm to 10 mm.
[0127] FIG. 3 shows the angle d1 formed between the first direction
16a in which the center line b1c of the first yarn introducing
passage b1 extends from the first yarn introducing port c1 to
outward of the first guide member A and the second direction 16b in
which the center line b2c of the second yarn introducing passage b2
extends from the yarn introducing port c2 to outward of the second
guide member B. It is preferred that the angle d1 is in the rage of
more than 0 degree to less than 180 degrees, for such reasons that
it can be prevented that the yarn is disengaged from the yarn
traverse guide TG1 while the yarn is traversed, and that the
threading of the yarn into the yarn traverse guide TG1 can be
facilitated. It is more preferred that the angle d1 is in the range
of 1 degree to 90 degrees.
[0128] In FIGS. 1 through 3, the center line b1c of the first yarn
introducing passage b1 and the center line b2c of the second yarn
introducing passage b2 are respectively straight, but they can also
be curved. In the case where the center line is a curve, the first
direction 16a at the first yarn introducing port c1 is the
tangential direction of the curve at the first yarn introducing
port c1, or the second direction 16b at the second yarn introducing
port c2 is the tangential direction of the curve at the second yarn
introducing port c2. It is preferred that the center lines b1c and
b2c and the first and second yarn introducing passages b1 and b2
are respectively straight, since the threading of the yarn into the
yarn traverse guide TG1 is easier.
[0129] In the embodiment shown in FIGS. 1 through 4, further, the
first yarn introducing passage extensional is formed in the first
guide member A, and the second yarn introducing passage extension
a2 is formed in the second guide member B. The first yarn
introducing passage extensional and the second yarn introducing
passage extension a2 are in such a positional relationship that
when they are projected on the same plane of projection, they
overlie each other.
[0130] The first yarn introducing passage extensional and the
second yarn introducing passage extension a2 are not essential in
the yarn traverse guide of the invention. However, they allow the
yarn to be more stably controlled by the yarn traverse guide. That
is, the first yarn introducing passage extensional and the second
yarn introducing passage extension a2 allow the yarn to be
traversed more stably without allowing the yarn to deviate from the
yarn traverse guide even in the case where the force in the yarn
running direction and the force in the direction different from the
traverse direction act on the yarn. So, it is preferred that the
first yarn introducing passage extensional is provided at the end
of the first yarn introducing passage b1 and that the second yarn
introducing passage extension a2 is provided at the end of the
second yarn introducing passage b2. Meanwhile, in the case where
the first yarn introducing passage extension a1 and the second yarn
introducing passage extension a2 do not exist, the yarn passes
through the first yarn introducing passage b1 of the first guide
member A and the second yarn introducing passage b2 of the second
guide member B.
[0131] It is preferred that the peripheral segment 11a including
the first yarn introducing port c1 of the first guide member A is
formed to be curved outward of the first guide member A as shown in
FIG. 1, and/or that the peripheral segment 11b including the second
yarn introducing port c2 of the second guide member B is formed to
be curved outward of the second guide member B as shown in FIG.
2.
[0132] In the case where the peripheral segment(s) 11a and/or the
peripheral segment 11b are/is curved outward of the guide
member(s), when the yarn traverse guide TG1 is driven for
traversing, the yarn introduced from the yarn introducing port c1
or c2 of one yarn guide into the yarn introducing passage b1 or b2
moves on the curved surface formed by the peripheral segment 11a or
11b of the other yarn guide, being introduced from the yarn
introducing port c1 or c2 of the yarn guide into the yarn
introducing passage b1 or b2. Thus, the yarn can be automatically
passed into the yarn traverse guide TG1 and introduced into the
steady traverse position in the yarn introducing passage.
[0133] FIG. 5 is a schematic side view showing a portion of a yarn
winder YW1 equipped with the yarn traverse guide TG1 of the
invention shown in FIGS. 3 and 4. The yarn winder YW1 per se is a
known conventional yarn winder.
[0134] FIG. 5 shows a rotating winding bobbin 5, a yarn package 4
formed around the winding bobbin 5, a pressure roller 3 rotating in
contact with the surface of the yarn package 4, a transverse guide
rail 2 positioned in the axis direction of the winding bobbin above
the pressure roller 3, a yarn traverse guide TG1 supported by the
traverse guide rail 2 for traversing in the direction of the
traverse guide rail 2, and a yarn 1 traversed by the yarn traverse
guide TG1 while being wound around the winding bobbin 5 and while
being kept in contact with the pressure roller 3.
[0135] In FIG. 5, the support and drive mechanisms of the winding
bobbin 5, the support and drive mechanisms of the pressure roller
3, the support mechanism of the traverse guide rail 2 and the drive
mechanism of the yarn traverse guide TG1 are not shown, but they
are widely known as conventional mechanisms.
[0136] FIGS. 6, 7 and 8 are schematic front views of the yarn
winder YW1 of FIG. 5. FIG. 6 shows the state where the yarn
traverse guide TG1 is located at the center of the traverse width.
FIG. 7 shows the state where yarn traverse guide TG1 is located at
the left end of the traverse width. FIG. 8 shows the state where
the yarn traverse guide TG1 is located at the right end of the
traverse width.
[0137] The yarn traverse guide TG1 moves continuously rightward in
the drawings along the traverse guide rail 2 over a desired
traverse width from the position of the yarn traverse guide TG1
shown in FIG. 7, via the position of the yarn traverse guide TG1
shown in FIG. 6 to the position of the yarn traverse guide TG1
shown in FIG. 8. Then, the yarn traverse guide TG1 changes its
direction, to move leftward, for completing one cycle of
reciprocation. Thereafter, the reciprocation is continued, and
during the continued reciprocation, the running yarn 1 is wound
around the winding bobbin 5 while being traversed by the yarn
traverse guide TG1, to form the yarn package 4.
[0138] FIGS. 9 through 12 show another embodiment of the yarn
traverse guide of the invention.
[0139] FIG. 9 is the top view of a first guide member C forming a
first yarn guide. In FIG. 9, the first guide member C is formed as
a semi-circular plate-like body, and has a space portion 20 inward
of the plate-like body. The first guide member C has a first yarn
introducing port c3 formed in a portion of a semi-circular
peripheral segment 21a and a first yarn introducing passage b3
extending from the first yarn introducing port c3 toward the space
portion 20. The first yarn introducing port c3 and the first yarn
introducing passage b3 communicating with it are formed with a slit
provided in the plate-like body.
[0140] The straight peripheral segment 22a on the side opposite to
the semi-circular peripheral segment 21a of the first guide member
C is bent upward, to form a guide member attaching portion 23a. The
guide member attaching portion 23a has screw holes 24a formed for
attaching.
[0141] The yarn passage of the yarn is formed in the direction from
the top side of the first guide member C toward the bottom side, or
in the direction from the bottom side toward the top side. For
threading the yarn into the first yarn guide, the yarn is
introduced from the first yarn introducing port c3 into the first
yarn introducing passage b3.
[0142] In the first guide member C, further, the first yarn
introducing passage b3 communicates, at its end, with a first yarn
introducing passage extension (yarn holding passage) a3 extending
in the direction different from the direction of the center line of
the first yarn introducing passage b3. FIG. 9 shows a case where
the center line of the first yarn introducing passage b3 is
straight, but it can also be curved. In the case of a curve, it is
preferred that the curve is smoothly curved, since the yarn moves
along the first yarn introducing passage b3 while running in the
vertical direction. The first yarn introducing passage extension a3
is open on the space portion 20 side to the space portion 20.
[0143] The first yarn introducing passage extension a3 is not
essential in the yarn traverse guide of the invention. However, if
the yarn traverse guide has the first yarn introducing passage
extension a3, the yarn can be more stably controlled by the yarn
traverse guide. That is, owing to the first yarn introducing
passage extension a3, even in the case where the force in the yarn
running direction and the force in the direction different from the
traverse direction act on the yarn, the yarn is not disengaged from
the yarn traverse guide and can be traversed more stably.
Therefore, it is preferred that the first yarn introducing passage
extension a3 is formed at the end of the first yarn introducing
passage b3. Meanwhile, in the case where the first yarn introducing
passage extension a3 does not exist, the yarn passes through the
first yarn introducing passage b3 and the space portion 20.
[0144] FIG. 10 is a top view showing a second guide member D
forming a second yarn guide. In FIG. 10, the second guide member D
comprises two bars 6a and 6b disposed parallel to each other with a
clearance kept between them, and a guide member attaching portion
23b to which the two bars 6a and 6b are attached. The clearance
between the two bars 6a and 6b forms a second yarn introducing
passage b4, and the inlet of the clearance forms a second yarn
introducing port c4. The guide member attaching portion 23b has
screw holes 24b formed for attaching.
[0145] The yarn passage of the yarn is formed in the direction from
the top side of the second guide member D toward the bottom side,
or in the direction from the bottom side toward the top side. For
introducing the yarn into the second yarn guide, the yarn is
introduced from the second yarn introducing port c4 into the second
yarn introducing passage b4.
[0146] In FIG. 10, the two bars 6a and 6b are free rollers
rotatably attached to the guide member attaching portion 23b, but
can also be non-rotating fixed bars. However, since the running
yarn is introduced into the second yarn introducing passage b4 and
runs in contact with the two bars 6a and 6b during traversing, it
is preferred that the two bars 6a and 6b are free rollers for
decreasing the damage to the yarn.
[0147] FIG. 11 is a schematic top view of the other embodiment of
the yarn traverse guide of the invention, using the combination
comprising the first yarn guide of FIG. 9 and the second yarn guide
of FIG. 10. FIG. 12 is a schematic front view showing the yarn
traverse guide of FIG. 11. In FIGS. 11 and 12, the yarn traverse
guide TG2 comprises the first guide member C forming the first yarn
guide, the second guide member D forming the second yarn guide, and
a guide attaching member (guide support) 7a to which these members
are fixed.
[0148] The first guide member C is fixed to the guide support 7a by
the screws 25a inserted in the screw holes 24a formed in the guide
member attaching portion 23a in the upper portion of the guide
support 7a. The second guide member D is fixed to the guide support
7a by the screws 25b inserted in the screw holes 24b formed in the
guide member attaching portion 23b, with a clearance e formed
against the first guide member C, in the lower portion of the guide
support 7a.
[0149] The first guide member C and the second guide member D are
fixed to the guide support 7a in such a manner as to establish the
following three positional relationships.
[0150] The first positional relationship is such that when the
first yarn introducing port c3 and the second yarn introducing port
c4 are projected on the same plane of projection, they do not
overlap each other. In this positional relationship, it can be
prevented that the running yarn traversed by the yarn traverse
guide TG2 deviates from the yarn traverse guide TG2 during
traversing.
[0151] The second positional relationship is such that when the
first yarn introducing passage b3 and the second yarn introducing
passage b4 are projected on the same plane of projection, they
overlap each other at least partially. In this positional
relationship, the running yarn traversed can pass through the yarn
traverse guide TG1 straight in the steady state of traversing.
[0152] The third positional relationship is such that the first
guide member C and the second guide member D keep a clearance e
between them. In this positional relationship, the yarn can be
easily threaded into the yarn traverse guide TG2. That is, this
positional relationship facilitates the introduction of the yarn
from the first yarn introducing port c3 of the first guide member C
into the first yarn introducing passage b3 and the introduction of
the yarn from the second yarn introducing port c4 of the second
guide member D into the second yarn introducing passage b4.
Meanwhile, the dimension of the clearance e is selected as in the
case of the abovementioned yarn traverse guide TG1.
[0153] FIG. 11 shows the angle d2 formed between the first
direction 26a in which the center line b3c of the first yarn
introducing passage b3 extending from the first yarn introducing
port c3 to outward of the first guide member C and the second
direction 26b in which the center line b4c of the second yarn
introducing passage b4 extending from the second yarn introducing
port c4 to outward of the second guide member D. The value of the
angle d2 is selected as in the case of the abovementioned yarn
traverse guide TG1.
[0154] In the yarn traverse guide TG2, to facilitate the
introduction of the yarn into the yarn traverse guide TG2, it is
preferred that when the first guide member C and the second guide
member D are projected on the same plane of projection, the tips of
the two bars (free rollers) 6a and 6b of the second guide member D
are positioned inside the peripheral segment 21a of the first guide
member C. In this case, if the first guide member C has the first
yarn introducing passage extension a3, it is more preferred for
preventing the yarn from deviating from the yarn traverse guide TG2
that the first yarn introducing passage extension a3 and the second
yarn introducing passage b4 of the second guide member D agree with
each other in direction.
[0155] In the yarn traverse guide TG2, while the yarn is in the
steady winding state, the running yarn passes through the second
yarn introducing passage b4 of the second guide member D and is
traversed by the bars (free rollers) 6a and 6b. In this state, it
is preferred that when the first guide member C and the second
guide member D are projected on the same plane of projection, the
central position of the space portion 20 of the first guide member
C and the position of the second yarn introducing passage b4 of the
second guide member D agree with each other. In this positional
relationship, while the yarn is in the steady winding state, the
state in which the running yarn that is being traversed does not
contact the first guide member C occurs, and the fuzz caused by the
rubbing of the traversed running yarn by the first guide member C
can be prevented. The yarn traverse guide TG2 having this
positional relationship is suitable as a yarn traverse guide for a
winder of a yarn such as carbon fibers likely to be fuzzed by
rubbing contact with an object.
[0156] In the yarn traverse guide TG2, to facilitate the threading
of the yarn into the yarn traverse guide TG2, it is preferred that
the peripheral segment 21a of the first guide member C is formed to
be curved outward. If the peripheral segment 21a is formed like
this, the yarn can be automatically introduced into the first yarn
introducing passage b3 from the first yarn introducing port c3 when
the yarn traverse guide TG2 is driven for traversing and threading
the yarn.
[0157] FIG. 13 is a schematic side view showing a portion of a yarn
winder YW2 equipped with the yarn traverse guide TG2 of the
invention shown in FIGS. 11 and 12. The yarn winder YW2 per se is a
known conventional yarn winder.
[0158] FIG. 13 shows a rotating winding bobbin 5a, a yarn package
4a formed around the winding bobbin 5a, a pressure roller 3a
rotating in contact with the surface of the yarn package 4a, a
traverse guide rail 2a positioned in the axial direction of the
winding bobbin 5a, above the pressure roller 3a, a yarn traverse
guide TG2 supported by the traverse guide rail 2a for traversing in
the direction of the traverse guide rail 2a, and a yarn 1a
traversed by the yarn traverse guide TG2 while being wound around
the winding bobbin 5a and while being kept in contact with the
pressure roller 3a.
[0159] In FIG. 13, the support and drive mechanisms of the winding
bobbin 5a, the support and drive mechanisms of the pressure roller
3a, the support mechanism of the traverse guide rail 2a and the
drive mechanism of the yarn traverse guide TG2 are not shown, but
they are widely known as conventional mechanisms.
[0160] FIGS. 14, 15 and 16 are schematic front views of the yarn
winder YW2 of FIG. 13. FIG. 14 shows the state where the yarn
traverse guide TG2 is located at the center of the traverse width.
FIG. 15 shows the state where the yarn traverse guide TG2 is
located at the left end of the traverse width. FIG. 16 shows the
state where the yarn traverse guide TG2 is located at the right end
of the traverse width.
[0161] The yarn traverse guide TG2 moves continuously rightward in
the drawings along the traverse guide rail 2a over a desired
traverse width from the position of the yarn traverse guide TG2
shown in FIG. 15, via the position of the yarn traverse guide TG2
shown in FIG. 14 to the position of the yarn traverse guide TG2
shown in FIG. 16. Then, the yarn traverse guide TG2 changes its
direction, to move leftward, for completing one cycle of
reciprocation. Thereafter, the reciprocation is continued, and
during the continued reciprocation, the running yarn 1a is wound
around the winding bobbin 5a while being traversed by the yarn
traverse guide TG2, to form the yarn package 4a.
[0162] The yarn traverse guide TG1 and the yarn traverse guide TG2
explained above are modes in which a first yarn guide formed as a
first guide member and a second yarn guide formed as a second guide
member are installed together, but in the yarn traverse guide of
the invention, the number of combined guides is not limited to two,
and can also be three or more. However, considering the production
cost of the yarn traverse guide and the maintenance of the yarn
winder, a yarn traverse guide comprising two yarn guides is more
economical.
[0163] The guide members used in the yarn traverse guide of the
invention are only required to be made of a material having
sufficient strength against the force applied by the yarn and the
force applied by traverse motion. Examples of the material include
carbon steel, stainless steel, ceramic, etc. It is preferred that
the surface roughness of the guide members at the portions in
contact with the yarn is 0.4 to 3.2 as the center line mean
roughness Ra measured according to JIS B 0601.
[0164] Examples of the invention and comparative examples are
explained below.
[0165] In the examples, whether or not a yarn could be stably
traversed without deviating from the yarn traverse guide was
observed while the force in the yarn running direction and the
force in the direction different from the traverse direction were
respectively allowed to act on the yarn. In this observation, the
stability of yarn passage control was referred to as an indicator.
Particularly, whether or not the yarn deviated from the yarn
traverse guide whenever the winding bobbin (paper tube) was moved
in the direction of leaving from the pressure roller was judged at
five traverse sites, namely, by locating the yarn traverse guide
traversing within a traverse width of 150 mm at 0 mm site (an end
of the traverse width), 150 mm site (the other end of the traverse
width), 75 mm site (the center of the traverse width), 37.5 mm site
(the center between 0 mm site and 75 mm site), and 112.5 mm site
(the center of 75 mm site and 150 mm site). The deviation of the
yarn from the yarn traverse guide refers to the state where the
yarn is disengaged from the yarn traverse guide and cannot be
traversed by the yarn traverse guide any more.
[0166] In the examples, whether or not the yarn could be easily
introduced (threaded) into the yarn traverse guide was judged as
follows. A yarn was wound around a winding bobbin (paper tube) at
the center, and the winding bobbin (paper tube) was kept in contact
with the pressure roller. Then, whether or not the yarn could be
automatically introduced into the yarn traverse guide during the
first one cycle of traversing (reciprocation) and whether or not
the yarn deviated from the yarn traverse guide during the next one
cycle of traversing (reciprocation) were observed. A case where the
yarn could be automatically introduced into the yarn traverse guide
and did not deviate is expressed as "Good," and a case where the
yarn could not be automatically introduced into the yarn traverse
guide or deviated is expressed as "Poor."
EXAMPLE 1
[0167] The yarn traverse guide TG1 shown in FIG. 3 was attached to
a turret (revolving) type yarn winder (EKTW-CA winder produced by
Kamitsu Seisakusho Ltd.), and a carbon fiber bundle produced by
carbonizing polyacrylonitrile fibers was wound around a winding
bobbin (paper tube) having an outer diameter of 80 mm, with a
traverse width of 150 mm at a yarn speed of 7 m/min.
[0168] The angle d1 between the two yarn guides (the first yarn
guide as the guide member A and the second yarn guide as the guide
member B) constituting the yarn traverse guide TG1 was set at 90
degrees, and the clearance e was set at 10 mm.
[0169] As shown in Table 1, whenever the winding bobbin (paper
tube) was moved in the direction of leaving from the pressure
roller, the yarn did not deviate from the yarn traverse guide TG1
irrespective of the position of the yarn traverse guide TG1.
Further, when the winding bobbin (paper tube) having the yarn wound
around it at the center was merely brought into contact with the
pressure roller, the yarn could be automatically introduced into
the yarn traverse guide TG1. The carbon fiber bundle wound around
the winding bobbin showed some fuzz, but it was trivial.
EXAMPLE 2
[0170] The yarn traverse guide TG2 shown in FIG. 11 was attached to
a turret (revolving) type yarn winder (EKTW-CA winder produced by
Kamitsu Seisakusho Ltd.), and a carbon fiber bundle produced by
carbonizing polyacrylonitrile fibers was wound around a winding
bobbin (paper tube) having an outer diameter of 80 mm, with a
traverse width of 150 mm at a yarn speed of 7 m/min.
[0171] The angle d2 between the two yarn guides (the first yarn
guide as the guide member C and the second yarn guide as the guide
member D) constituting the yarn traverse guide TG2 was set at 50
degrees, and the clearance e was set at 5 mm.
[0172] As shown in Table 1, whenever the winding bobbin (paper
tube) was moved in the direction of leaving from the pressure
roller, the yarn did not deviate from the yarn traverse guide TG2
irrespective of the position of the yarn traverse guide TG2.
Further, when the winding bobbin (paper tube) having the yarn wound
around it at the center was merely brought into contact the
pressure roller, the yarn could be automatically introduced into
the yarn traverse guide TG2. The carbon fiber bundle wound around
the winding bobbin did not show fuzz.
COMPARATIVE EXAMPLE 1
[0173] A carbon fiber bundle was wound around a winding bobbin
(paper tube) as described in Example 1, except that the yarn
traverse guide as shown in FIGS. 3 and 4 of Patent Document 3 was
used.
[0174] In the yarn traverse guide used, the yarn arresting groove,
the yarn disengagement prevention hook and the yarn guide portion
were respectively disposed to ensure that the clearance between the
yarn arresting groove and the tip portion of the yarn disengagement
prevention hook became 1 mm and that the end portion of the yarn
disengagement prevention hook became flush with the yarn guide
portion positioned on the other side of the yarn arresting groove
(for facing the 0 mm site direction).
[0175] As shown in Table 1, whenever the winding bobbin (paper
tube) was moved in the direction of leaving from the pressure
roller, the yarn did not deviate from the yarn traverse guide
irrespective of the position of the yarn traverse guide. However,
when the winding bobbin (paper tube) having the yarn wound around
it at the center was merely brought into contact with the pressure
roller, the yarn could not be automatically introduced into the
yarn traverse guide. Therefore, the yarn was introduced into the
yarn traverse guide manually. The carbon fiber bundle wound around
the winding bobbin showed some fuzz, but it was trivial.
COMPARATIVE EXAMPLE 2
[0176] A carbon fiber bundle was wound around a winding bobbin
(paper tube) as described in Comparative Example 1, using the yarn
traverse guide used in Comparative Example 1. However, the yarn
arresting groove and the yarn disengagement prevention hook were
disposed to ensure that the clearance between the yarn arresting
groove and the tip portion of the yarn disengagement prevention
hook became 10 mm.
[0177] As shown in Table 1, when the winding bobbin (paper tube)
having the yarn wound around it at the center was merely brought
into contact with the pressure roller, the yarn could be
automatically introduced into the yarn traverse guide. However,
when the winding bobbin (paper tube) was moved in the direction of
leaving from the pressure roller, the yarn deviated from the yarn
traverse guide with the yarn traverse guide located at 112.5 mm
site and 150 mm site. The carbon fiber bundle wound around the
winding bobbin showed some fuzz, but it was trivial.
COMPARATIVE EXAMPLE 3
[0178] A carbon fiber bundle was wound around a winding bobbin
(paper tube) as described in Example 1, except that the yarn
traverse guide described in Patent Document 1 was used.
[0179] As shown in Table 1, when the winding bobbin (paper tube)
having the yarn wound around it at the center was merely brought
into contact with the pressure roller, the yarn could be
automatically introduced into the yarn traverse guide. However,
when the winding bobbin (paper tube) was moved in the direction of
leaving from the pressure roller, the yarn deviated from the yarn
traverse guide irrespective of the position of the yarn traverse
guide. The carbon fiber bundle wound around the winding bobbin did
not show fuzz.
TABLE-US-00001 TABLE 1 Stability of yarn passage control Whether or
not the yarn deviated from the Yarn traverse guide intro- Site (mm)
duction 0 37.5 75 112.5 150 Example 1 Easy Did not Did not Did not
Did not Did not Example 2 Easy Did not Did not Did not Did not Did
not Comparative Difficult Did not Did not Did not Did not Did not
Example 1 Comparative Easy Did not Did not Did not Did Did Example
2 Comparative Easy Did Did Did Did Did Example 3
INDUSTRIAL APPLICABILITY
[0180] In the yarn traverse guide of the invention, even in the
case where the force in the yarn running direction and the force in
the direction different from the traverse direction act on the
yarn, the yarn does not deviate from the yarn traverse guide, and
the state where the yarn is stably arrested by the yarn traverse
guide can be sustained. The yarn traverse guide of the invention
allows the yarn to be easily threaded into the yarn traverse guide.
The yarn traverse guide of the invention can be suitably used in a
yarn winder such as a turret (revolving) type yarn winder, in which
the force in the yarn running direction and the force in the
direction different from the traverse direction act on the yarn
during the automatic transfer of the yarn from a fully loaded
bobbin to an empty bobbin, though such forces do not act on the
yarn in the steady winding state.
* * * * *