TRAVERSE GUIDE, WINDING UNIT, AND YARN WINDING MACHINE
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a traverse guide adapted to traverse
a yarn.
2. Description of the Related Art
Conventionally, there is known a traverse guide including an
arm section and a yarn hooking section. The arm section is an
elongatemember. Theyarnhookingsectionis connectedtoatip-end
of the arm section. The yarn hooking section is provided with a
groove or the like adapted to hook and hold the yarn. The traverse
guide can traverse the yarn with respect to a package by
reciprocating the arm section with a motor or the like with the
yarn hooking section holding the yarn. Japanese Unexamined Patent
PublicationNo. 2010-137944 discloses this type of traverse guide.
The traverse guide disclosed in Japanese Unexamined Patent
Publication No. 2010-137944 includes an arm section configured by
two plate materials, and a hook-like yarn hooking section. The two
plate materials configuring the arm section are arranged to face
each other with a gap. With this configuration, air resistance of
the arm section involved in reciprocating movement can be reduced,
and a load on the motor adapted to drive the arm section can be
reduced.
Japanese Unexamined Patent Publication No. 2010-137944
discloses a CFRP (Carbon Fiber Reinforced Plastics), a complex
material including inorganic fiber (glass fiber, ceramic fiber,
or the like) and/or organic fiber (aramid fiber, PBO
(Poly-p-phenylenebenzobisoxazole) fiber, ultrahigh molecular
weight polyethylene, or the like), analloyincludingalightweight
metal (magnesium, berylium, aluminum, titanium, or the like), and
the like for the material of the arm section.
W01999/047739describesprovidinginatraversearmincluding
a fork-shapedyarnguide, anabrasion resistantmember onboth s i d e s
of a slit of t h e yarn guide. However, how t h e abrasion r e s i s t a n t
member is attached t o t h e yarn guide is n o t d e s c r i b e d .
BRIEF SUMMARY OF THE INVENTION
The yarn hooking s e c t i o n is abraded by making contact with
t h e yarn. Therefore, t h e yarn hooking s e c t i o n is p r e f e r a b l y
configuredbyamemberhaving abrasion r e s i s t a n c e s u c h a s ceramics.
The ceramics has a r e l a t i v e l y heavy weight, and thus a load is
applied on t h e motor adapted t o d r i v e t h e arm s e c t i o n . Since t h e
yarn hooking s e c t i o n is connected t o one end of t h e a r m s e c t i o n ,
when r e c i p r o c a t i n g l y swinging t h e arm s e c t i o n with t h e o t h e r end
of t h e arm s e c t i o n as a swing s h a f t , f o r example, i n e r t i a becomes
l a r g e and t h e l o a d a p p l i e d on t h e motor i n c r e a s e s .
A member having t h e abrasion r e s i s t a n c e such a s ceramics
g e n e r a l l y has high hardness, and thus has low toughness and tends
t o e a s i l y break. The t r a v e r s e guide is provided t o t r a v e r s e t h e
yarncontinuouslyathighspeed, andhence improvement i n d u r a b i l i t y
is demanded.
An object of t h e p r e s e n t i n v e n t i o n is t o provide a t r a v e r s e
guide i n which d u r a b i l i t y of a yarn hooking s e c t i o n ( y a r n guiding
s e c t i o n ) is improved while a load on a motor adapted t o d r i v e t h e
arm-like t r a v e r s e guide is reduced.
A t r a v e r s e guide comprises an arm body including a frame body
on which a mounting groove is formed, t h e mounting groove being
arranged on a f i r s t end among ends i n a l o n g i t u d i n a l d i r e c t i o n of
t h e arm body and opened i n a d i r e c t i o n towards a second end, t h e
second end being an opposite end with r e s p e c t t o t h e f i r s t end i n
t h e l o n g i t u d i n a l d i r e c t i o n , and a yarn guiding s e c t i o n made of
ceramics arranged on a groove wall of t h e frame body and on which
a yarn hooking groove is formed t o be opened i n a d i r e c t i o n towards
t h e second end.
A winding u n i t comprises t h e t r a v e r s e guide, t h e t r a v e r s e
guide being adapted t o t r a v e r s e a yarn while hooking t h e yarn with
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the yarn hooking groove, a traverse guide driving section adapted
to drive the traverse guide, and a cradle adapted to hold a package
formed by the yarn being traversed by the traverse guide.
Ayarnwindingmachinecomprises a p l u r a l i t y o f w i n d i n g u n i t s .
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view of an automatic winder according to
one embodiment of the present invention;
FIG. 2 is a front view and a block diagram of a winder unit;
FIG. 3 is a schematic side view of a traverse device;
FIG. 4 is a perspective view showing a configuration of an
arm body and a yarn guiding piece;
FIG. 5A is a view showing a step formed between the arm body
and the yarn guiding piece;
FIG. 5B is a view showing a state in which the step is covered
by an adhesive; and
FIG. 6 is a perspective view describing a mounting method of
the arm body and the yarn guiding piece.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Embodiments of the invention will be hereinafter described.
First, an overall configuration of an automatic winder 1 according
to an embodiment will be described with reference to FIG. 1.
"Upstream" and "downstream" respectively refer to upstream and
downstream in a travelling direction of a yarn at the time of yarn
winding. As illustrated in FIG. 2 and the like, in the present
embodiment, since a yarn 20 unwound from a yarn supplying bobbin
21 in a yarn supplying section 16 is wound by a winding section
17, the yarn supplying section 16 side is the upstream and the
winding section 17 side is the downstream.
As illustrated in FIG. 1, the automatic winder (yarn winding
machine) 1 includes a plurality of winder units (winding units)
10 arranged in line, an automatic doffing device 8, and a machine
control device 90.
Each winder u n i t 10 is configured t o wind t h e yarn 20 unwound
from t h e yarn supplying bobbin 21 around a winding bobbin 22 while
t r a v e r s i n g t h e yarn 20 t o form a package 30.
When t h e package 30 is f u l l y wound i n one of t h e winder u n i t s
10, t h e automatic doffing device 8 t r a v e l s t o a p o s i t i o n of t h e
r e l e v a n t winder u n i t 10 t o c o l l e c t t h e fully-wound package 30 and
supply a winding bobbin (empty winding bobbin) 22 around which t h e
yarn 20 is not wound. The automatic doffing device 8 may only
c o l l e c t t h e fully-wound package 30 and may not supply t h e empty
winding bobbin 22. The automatic doffing device 8 may not c o l l e c t
the fully-wound package 30 and may only supply the empty winding
bobbin 22.
The machine c o n t r o l device 90 includes an o p e r a t i o n s e c t i o n
91 and a d i s p l a y s e c t i o n 92. An operator may input a predetermined
set value o r select an appropriate c o n t r o l method by o p e r a t i n g t h e
o p e r a t i o n s e c t i o n 91. The s e t t i n g is thereby made on each winder
u n i t 10. The d i s p l a y s e c t i o n 92 may d i s p l a y winding s t a t u s of t h e
yarn 20 i n each winder u n i t 10, content of t r o u b l e t h a t occurred,
and t h e l i k e .
Next, a d e s c r i p t i o n w i l l be made on a d e t a i l e d c o n f i g u r a t i o n
of t h e winder u n i t 10 with reference t o F I G . 2 and F I G . 3. Each
w i n d e r u n i t 1 0 i n c l u d e s a w i n d i n g u n i t m a i n b o d y 1 1 a n d a u n i t c o n t r o l
s e c t i o n 50.
The u n i t c o n t r o l s e c t i o n 50 includes, f o r example, a Central
P r o c e s s i n g u n i t (CPU), anda ReadOnlyMemory (ROM). TheROM s t o r e s
a program f o r c o n t r o l l i n g each component of t h e winding u n i t main
body 11. The CPU executes t h e program s t o r e d i n t h e ROM.
The winding u n i t main body 11 includes a yarn supplying
s e c t i o n 1 6 , ayarn-unwindingassistingdevice12, a t e n s i o n a p p l y i n g
device 13, a s p l i c e r device 1 4 , a c l e a r e r (yarn q u a l i t y measuring
device) 15, and t h e winding s e c t i o n 17 arranged i n t h i s order from
t h e yarn supplying bobbin 21 along a yarn t r a v e l l i n g path between
t h e yarn supplying bobbin 21 and t h e winding bobbin (winding tube,
paper tube, c o r e t u b e ) 22.
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i n t h e yarn 20 as t h e yarn d e f e c t .
A lower yarn guiding pipe 25 f o r catching t h e lower yarn from
t h e yarn supplying bobbin 21 and guiding t h e lower yarn t o t h e
s p l i c e r device14 is arrangedbelowthe s p l i c e r device 1 4 . Anupper
yarn guiding pipe 26 f o r catching t h e upper yarn from t h e package
30 and guiding t h e upper yarn t o t h e s p l i c e r device 1 4 is arranged
above t h e s p l i c e r device 1 4 . The lower yarn guiding pipe 25 and
t h e upper yarn guiding pipe 26 can r e s p e c t i v e l y swing with s h a f t s
33 and 35 as a c e n t e r . A suction port 32 is formed a t a t i p - e n d
of t h e lower yarn guiding pipe 25. A suction mouth 34 is arranged
at a tip-end of the upper yarn guiding pipe 26. An appropriate
n e g a t i v e p r e s s u r e s o u r c e ( n o t i l l u s t r a t e d ) i s c o n n e c t e d t o t h e lower
yarn guiding pipe 25 and t h e upper yarn guiding pipe 26. The lower
yarn g u i d i n g p i p e 25 and t h e upper yarn g u i d i n g p i p e 26 can generate
a suction flow a t t h e suction port 32 and t h e suction mouth 34 t o
suck and catch yarn ends of t h e upper yarn and t h e lower yarn.
Thewinding s e c t i o n 1 7 includes a c r a d l e 23, a t r a v e r s e device
27, and a contact r o l l e r 29.
The c r a d l e 23 removably holds t h e winding bobbin 22. The
c r a d l e 23 can swing towards a f r o n t s i d e and a back s i d e of t h e
winder u n i t 10, and can absorb an i n c r e a s e i n a yarn l a y e r diameter
of t h e package 30 accompanying t h e winding of t h e yarn 20 around
t h e winding bobbin 22. I n o t h e r words, even i f t h e yarn l a y e r
diameter of t h e package 30 changes accompanying t h e winding of t h e
yarn 20, a surface of t h e package 30 can be a p p r o p r i a t e l y made i n
contact w i t h a surface of t h e contact r o l l e r 29. By winding t h e
yarn 20 around t h e conical winding bobbin 22, t h e c r a d l e 23 and
t h e t r a v e r s e d e v i c e 2 7 c a n f o r m t h e c o n i c a l p a c k a g e 3 0 a s i l l u s t r a t e d
i n FIG. 2.
Apackagedrivingmotor (winding t u b e d r i v i n g s e c t i o n ) 41such
a s a servo motor is provided on t h e c r a d l e 23. The winding s e c t i o n
17 r o t a t a b l y d r i v e s t h e winding bobbin 22 with t h e package d r i v i n g
motor 4 1 t o w i n d t h e yarn20 around t h e surface o f t h e w i n d i n g b o b b i n
22 (or t h e surface of package 30). An operation of t h e package
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driving motor 41 is controlled by the unit control section 50. A
package-driving-motor control section may be provided
independently from the unit control section 50, and the operation
of the package driving motor 41 may be controlled by the
package-driving-motor control section.
The contact roller 29 is arranged to make contact with a
peripheral surface ofthewinding bobbin 22 or aperipheralsurface
of the package 30. The contact roller 29 is rotated accompanying
the rotation of the winding bobbin 22 or the package 30.
The traverse device 27 is an arm-type traverse device, and
traverses the yarn 20 with respect to the surface of the package
30. The winding section 17 is adapted to wind the yarn 20 into the
package 30 while traversing the yarn 20 by the traverse device 27.
As illustrated in FIG. 3, the traverse device 27 includes a
traverse guide 28, a traverse guide driving motor (traverse guide
driving section) 45, and a guide plate 52.
The traverse guide 28 is an elongate member adapted to swing
about a supporting axis. A yarn hooking groove 70a (see FIG. 5A
and the like, to be described later) is formed at a first end (side
close to the yarn 20, tip-end side) of the traverse guide 28 so
that the yarn 20 can be hooked. A second end (basal end side) of
the traverse guide 28 is fixed to a drive shaft 45a of the traverse
guide drive motor 45 while being reinforced by a boss portion 46.
The traverse guide driving motor 45 is configured by a servo
motor, for example, and is provided to drive the traverse guide
28. The traverse guide driving motor 45 may be configured by other
appropriate motors such as a brushless DC motor, a stepping motor,
a voice coil motor, or the like. The detailed shape and the
structure of the traverse guide 28 will be described later.
The traversedevice27 drivesthetraverseguidedrivingmotor
45 to reciprocate the traverse guide 28 with the yarn 20 hooked
at the first end (the yarn hooking groove 70a) of the traverse guide
28. The traverse device 27 thus reciprocates the first end of the
traverse guide 28 in a winding width direction of the ,package 30
to traverse the yarn 20 with respect to the surface of the package
30. The winder unit 10 thus winds the yarn 20 around the winding
bobbin 22 while traversing the yarn 20 at a predetermined speed
to a prescribed winding width, and forms a yarn layer formed on
an outer peripheral surface of the winding bobbin 22 at a desired
density.
An operation of the traverse guide driving motor 45 is
controlled by the unit control section 50. However, instead of
being controlled by the unit control section 50, a dedicated
traverse control section may be provided, and the traverse guide
drivingmotor 45maybe controlledby t h i s t r a v e r s e c o n t r o l s e c t i o n .
The guide plate 52 is arranged upstream of the traverse guide 28.
The guide plate 52 bends a yarn path of the yarn 20 located upstream
of the guide plate 52 towards the contact roller 29 to guide the
yarn 20 such that the yarn 20 can be caught by the traverse guide
28.
Next, the shape and the structure of the traverse guide 28
will be described in detail with reference to F I G . 4 to F I G . 6.
The traverse guide 28 includes an arm body 60, and a yarn
guiding piece (yarn guiding section) 70. The arm body 60 is an
elongate plate-like member made with a light weight metal such as
magnesium alloy or aluminum alloy, or a high strength resin. The
arm body 60 includes an arm section 61, a bent section 62, and a
hooking section (frame body) 63.
The arm section 61 occupies a majority of the arm body 60.
The arm section 61 has a plurality.of holes formed at a central
part, and a shaft hole 61a, a key groove 61b, and fixing holes 61c
formed at the second end. The hole formed in the arm section 61
may be one or may be omitted.
The shaft hole 61a is formed as a circular hole. The drive
shaft 45a of the traverse guide driving motor 45 is inserted to
the shaft hole 61a. The key groove 61b is formed as a groove having
a rectangular cross-sectional contour, and is a groove adapted to
couple with the drive shaft 45a. Three fixing holes 61c are formed
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to surround the shaft hole 61a. The fixing holes 61c are holes for
fixing the boss portion 46. Screw holes are formed on the boss
portion 46 so as to correspond with a position of the fixing holes
61c. The boss portion 46 can be fixed to the traverse guide 28 by
aligning the screw holes and the fixing holes 61c and tightening
with bolts or the like. The number of fixing holes 61c is not
particularly limited.
The bent section 62 is formed between the arm section 61 and
the hooking section 63. The bent section 62 is bent in a direction
in which the hooking section 63 approaches the contact roller 29.
Since a free length (length of the yarn 20 from the traverse guide
28 until making contact with the contact roller 29) can be reduced,
a behavior of the yarn 20 can be stabilized. Therefore, the winder
unit 10 can form a high quality package 30.
The hooking section 63 is a section constituting the first
end of the arm body 60, and is formed in a frame shape and a hook
shape. Thehooking section 63is formedwithamountinggroove 63a,
a guide surface 63b, and a positioning section 63c.
The mounting groove 63a is formed to be elongate in a
longitudinal direction ofthe armbody 60 when seeninthethickness
direction of the arm body 60 (see FIG. 5A). The mounting groove
63a is formed to open the end on one side of the long hole (direction
towards the second end of the arm body 60). The yarn guiding piece
70 is attached to an inner side of the mounting groove 63a. The
hooking section 63 holdsthe yarnguidingpiece 70 so as to surround
the yarn guiding piece 70.
The guide surface 63b is a surface formed diagonally from an
outer side to an inner side of the hooking section 63 (opening
section of the mounting groove 63a). The guide surface 63b guides
the yarn 20 to the yarn hooking groove 70a during the catching of
the yarn 20 by the traverse guide 28.
The positioning section 63cis usedto determine the position
when mounting the yarn guiding piece 70 to the arm body 60. The
positioning section 63c is the step-like section formed on a wall
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s u r f a c e c o n s t i t u t i n g t h e mounting groove 63a.
The yarn guiding piece 70 is mounted on a groove wall of t h e
hooking s e c t i o n 63 ( i n n e r s i d e of t h e mounting groove 63a). The
y a r n g u i d i n g p i e c e 7 0 i s m a d e w i t h c e r a m i c s . Theyarnhookinggroove
70a, a guide surface 70b, and a s t e p - l i k e s e c t i o n 70c a r e formed
i n t h e yarn guiding piece 70.
The yarn hooking groove 70a has a same shape a s t h e mounting
groove 63a. The yarn hooking groove 70a is a groove formed t o open
an end on one s i d e ( d i r e c t i o n towards t h e second end of t h e arm
body 60) of t h e long h o l e ( e l o n g a t e shape) . The yarn hooking groove
7 0 a i s formed suchthatalongitudinaldirectionofthe yarnhooking
groove 70a coincides with t h e l o n g i t u d i n a l d i r e c t i o n of t h e arm
body 60. After t h e yarn 20 is caught by t h e t r a v e r s e guide 28, t h e
yarn 20 is located i n s i d e t h e yarn hooking groove 70a. When t h e
wall surface of t h e yarn hooking groove 70a pushes t h e yarn 20
accompanying t h e r e c i p r o c a t i n g movement of t h e t r a v e r s e guide 28,
t h e yarn 20 is t r a v e r s e d with r e s p e c t t o t h e package 30. The yarn
hooking groove 70a of t h e present embodiment is formed t o be closed
i n a d i r e c t i o n towards t h e f i r s t end of t h e arm body 60 and opened
i n a d i r e c t i o n towards t h e second end. Even i f a f o r c e i n t h e
d i r e c t i o n towards t h e f i r s t end a c t s on t h e yarn 20, t h e yarn 20
is not displaced from t h e yarn hooking groove 70a.
The guide surface 70b is formed t o l i n e a r l y continue t o t h e
guide surface 63b of t h e arm body 60. When catching t h e yarn 20
by t h e t r a v e r s e guide 28, t h e yarn 20 is guided t o t h e yarn hooking
groove 70a v i a t h e guide surface 63b and t h e guide s u r f a c e 70b.
Since t h e yarn 20 can be guided t o t h e proximity o f t h e yarn hooking
groove 70a by forming t h e guide surface 70b, t h e t r a v e r s e guide
28 can r e l i a b l y catch t h e yarn 20.
The s t e p - l i k e s e c t i o n 70c is used f o r p o s i t i o n i n g when
m o u n t i n g t h e y a r n g u i d i n g p i e c e 7 0 t o t h e a r m b o d y 6 0 . The s t e p - l i k e
s e c t i o n 70c is formed on an o u t e r p e r i p h e r a l s u r f a c e of t h e yarn
guiding piece 70. The s t e p - l i k e s e c t i o n 70c is formed i n a shape
t h a t corresponds with t h e p o s i t i o n i n g section. 63c. The p o s i t i o n
of the yarn guiding piece 70 can be determined by aligning the
step-like section 70c and the positioning section 63c.
Substantially the entire outer peripheral surface ofthe yarn
guiding piece 70 is covered by the hooking section 63 of the arm
body 60. Thus, the arm body 60 can reliably hold the yarn guiding
piece 70.
Next, processes of mounting the yarn guiding piece 70 to the
arm body 60 will be described with reference to FIG. 5A, FIG. 5B,
and FIG. 6.
In the present embodiment, the yarn guiding piece 70 is
mounted on the arm body 60 by an adhesive. Specifically, the
operator applies the adhesive on at least one of the wall surface
constituting the mounting groove 63a and the outer peripheral
surface of the yarn guiding piece 70. In this case, the operator
adjusts an application amount of the adhesive so that the adhesive
is slightly squeezed out from the boundary between the arm body
60 and the yarn guiding piece 70 when adhering.
The operator then inserts the yarn guiding piece 70 to the
mounting groove 63a from one side in the thickness direction of
the arm body 60 (see FIG. 6). Accordingly, the position of the yarn
guiding piece 70 is determined at an area where the positioning
section 63c and the step-like section 70c make contact, and the
arm body 60 and the yarn guiding piece 70 can be adhered to one
another.
A step may be formed at the boundary between the arm body 60
and the yarn guiding piece 70. The yarn 20 may get caught at such
a step and a yarn breakage may occur. The step that becomes a cause
of yarn breakage may be a step formed at a boundary between the
guide surface 63b and the guide surface 70b (see reference symbol
A in FIG. 5A), or may be a step formed at a boundary between a basal
end of the yarn guiding piece 70 and the arm body 60 (see reference
symbol B in FIG. 5A) .
Inthe present embodiment, the adhesive is appliedto a degree
in which the adhesive is slightly squeezed out from the boundary
between the arm body 60 and the yarn guiding piece 70. By
intentionallymaking the adhesive to be squeezed out at the portion
of the step, the step may be made smooth, or a gradual protrusion
that covers the step can be formed (see FIG. 5B). In FIG. 5B, the
adhesive is illustrated to be protruding at two specific areas,
but the adhesive may be applied to cover other boundary.
The traverse guide 28 of the present embodiment includes the
arm body 60 and the yarn guiding piece 70. The arm body 60 includes
the hooking section 63 on which the mounting groove 63a is formed.
The mounting groove 63a is located at the first end of the arm body
60 and is opened in t h e d i r e c t i o n towards the second end. The yarn
guiding piece 70 is made of ceramics and is arranged on the groove
wall ofthe hooking section 63. The yarn guidingpiece 70 is formed
with the yarn hooking groove 70a opened in the direction towards
the second end of the arm body 60.
The traverse guide 28 excels in abrasion resistance since the
portion that makes contact with the yarn 20 is made of ceramics.
Since the hooking section 63 is arranged to cover the yarn guiding
piece 70, the yarn guiding piece 70 can be reliably held and
durability is improved.
In the traverse guide 28 of the present embodiment, the arm
body 60 and the yarn guiding piece 70 are adhered by the adhesive.
Since a fixing hole or the like for fixing the yarn guiding piece
70 to the arm body 60 is not required to be formed, a manufacturing
cost of the traverse guide 28 can be suppressed.
In the traverse guide 28 of the present embodiment, the arm
body 60 and the yarn guiding piece 70 are adhered by the adhesive
such that the adhesive covers the boundary between the mounting
groove 63a and the yarn guiding piece 70. Even if a step is formed
at the boundarybetweenthemounting groove 63a and the yarn guiding
piece 70, the yarn 20 can be prevented from getting caught at the
step during the catching of the yarn 20 by the traverse guide 28
and the like. Therefore, occurrence of yarn breakage and the like
can be prevented.
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In the traverse guide 28 of the present embodiment, the
positioning section 63c adapted to position the yarn guiding piece
70 with respect to the arm body 60 is formed on the arm body 60.
Since the positioning accuracy of the yarn guiding piece 70 can
be improved, the step formed at the boundary between the mounting
groove 63a and the yarn guiding piece 70 can be reduced.
In the traverse guide 28 of the present embodiment, the
positioning section 63c is formed so that the yarn guiding piece
70 can be inserted to the mounting groove 63a from one side in the
thickness direction of the arm body 60. Since the position of the
yarn guiding piece 70 can be easily determined, the operator can
promptly carry out a mounting operation.
In the traverse guide 28 of the present embodiment, the yarn
hooking groove 70a is formed in a long hole shape (elongate shape)
with a basal end side opened. A longitudinal direction of the long
hole coincides with a longitudinal direction of the arm body 60.
Since the length of the yarn hooking groove 70a thus can be made
relatively long, the yarn 20 is less likely to be displaced from
the yarn hooking groove 70a while being traversed.
In the traverse guide 28 of the present embodiment, the arm
body 60 and the yarn guiding piece 70 respectively includes the
guide surfaces 63b and 70b adapted to guide the yarn 20 to the yarn
hooking groove 70a. Since the guide surface is formed on both the
arm body 60 and the yarn guiding piece 70, the yarn 20 can be guided
to the proximity of the yarn hooking groove 70a during the catching
of the yarn 20 by the traverse guide 28. Therefore, the traverse
guide 28 can reliably catch the yarn 20.
The preferred embodiments ofthe present invention have been
describedabove, butthe structures describedabovemay bemodified
as below.
The material of the arm body 60 is preferably a light weight
metal or a resin, as described in the above embodiment, but may
be other materials such as the material disclosed in Japanese
Unexamined Patent Publication No. 2010-137944. The other
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materials ofthe armbody 60include, for example, a carbon composite
material, specifically, fiber-reinforced plastic including carbon
fiber, boron fiber, and aramid fiber or the like.
The first end of the arm body 60 may not be formed in a hook
shape as long as the first end has a frame shape and is provided
with the mounting groove.
T h e y a r n g u i d i n g p i e c e 7 0 i s n o t l i m i t e d t o t h e shapedescribed
in the above embodiment. For example, the guide surface 70b may
not be provided.
In the embodiment described above, the positioning section
63c and the step-like section 70c are formed in a step-form, but
may have a configuration other than the step-form. For example,
the projection projecting to an inner side from the mounting groove
63a may be formed, and a recess having a shape corresponding to
such a projection may be formed on the outer peripheral surface
of the yarn guiding piece 70.
A mounting method of the yarn guiding piece 70 with respect
to the arm body 60 is not limited to the adhesive, and for example,
a bolt or the like may be used.
An example of a general cone winding package has been
describedinthe above embodiment byway of example, butthe package
formed by the winder unit 10 may be a winding package of which an
end surface is tapered or a cheese-shaped package.
As described above, the traverse device 27 is not limited to
a configuration of reciprocating the traverse guide 28 within a
substantially horizontal plane with respect to an installation
surface of the winder unit 10. For example, as in Japanese
Unexamined Patent Publication No. 2010-137944, a configurationmay
be adopted in which the longitudinal direction of the traverse arm
is substantially perpendicular to the installation surface of the
winder unit.
The package driving motor 41 is not limited to a servo motor,
andmaybevarious types ofmotors suchasa stepmotoror aninduction
motor. The contact roller 29 may be driven with an appropriate
driving device and the package 30 may be rotated accompanying the
rotation of the contact roller 29.
The yarn winding machine is not limited to the automatic
winder, and can be applied to other yarn winding machines such as
a re-winding machine, a fine spinning machine (e.g., an air-jet
spinning machine, an open-end spinning machine), and the like.
According to a first aspect of the present invention, a
traverse guide includes an arm body and a yarn guiding section.
The arm body includes a frame body on which a mounting groove is
formed. The mounting groove is arranged on a first end among ends
inalongitudinaldirectionofthe armbodyandopenedina d i r e c t i o n
towards a second end, the second end being an opposite end with
respect to the first end in the longitudinal direction. The yarn
guiding section is made of ceramics. The yarn guiding section is
arranged on a groove wall of the frame body. A yarn hooking groove
is formed in the yarn guiding section and is opened in a direction
towards the second end.
Since a contacting area of a yarn during traversing is made
of ceramics, the traverse guide excels in abrasion resistance.
Since the frame body of the arm body is arranged to cover the yarn
guiding section, the yarn guiding section can be reliably held and
durability is improved.
In the above traverse guide, the armbody and the yarn guiding
section are preferably adhered by adhesive. Since a fixing hole
and the like for fixing the yarn guiding section to the arm body
is not required to be formed, a manufacturing cost of the traverse
guide can be suppressed.
In the above traverse guide, the armbody and the yarn guiding
section are preferably adhered by the adhesive such that the
adhesive covers a boundarybetweenthemounting groove and the yarn
guiding section. Even if a step is formed at the boundary between
the mounting groove and the yarn guiding section, the yarn can be
prevented from getting caught at the step during catching of the
yarn by the traverse guide and the like. Therefore, occurrence of
16
yarn breakage and t h e l i k e can be prevented.
In t h e above t r a v e r s e guide, a p o s i t i o n i n g s e c t i o n adapted
t o p o s i t i o n t h e yarn guiding s e c t i o n with r e s p e c t t o t h e arm body
is p r e f e r a b l y formed on t h e arm body. Accordingly, s i n c e p o s i t i o n
accuracy (mounting accuracy) of t h e yarn guiding s e c t i o n can be
improved, t h e s t e p formed a t t h e boundary between t h e mounting
groove and t h e yarn guiding s e c t i o n can be made small.
I n t h e above t r a v e r s e guide, t h e p o s i t i o n i n g s e c t i o n is
p r e f e r a b l y formed such t h a t t h e yarn guiding s e c t i o n is i n s e r t e d
i n t o t h e mounting groove from one s i d e i n a thickness d i r e c t i o n
of t h e arm body. Accordingly, s i n c e a p o s i t i o n of t h e yarn guiding
s e c t i o n can be e a s i l y determined, an operator can promptly c a r r y
out a mounting operation.
I n t h e above t r a v e r s e guide, t h e yarnhookinggrooveis formed
i n an elongate shape with one end opened. A l o n g i t u d i n a l d i r e c t i o n
of t h e elongate yarn hooking groove coincides with a l o n g i t u d i n a l
d i r e c t i o n o f t h e a r m b o d y . Sincealengthoftheyarnhookinggroove
can be made r e l a t i v e l y long, t h e yarn is less l i k e l y t o be d i s p l a c e d
from t h e yarn hooking groove while being t r a v e r s e d .
I n t h e above t r a v e r s e guide, a m a t e r i a l of t h e arm body
p r e f e r a b l y i n c l u d e s atleastoneofmagnesiumalloy, aluminumalloy,
and r e s i n . Since t h e magnesium a l l o y , t h e aluminum a l l o y , and t h e
r e s i n a r e g e n e r a l l y l i g h t e r than t h e ceramics, a s compared t o a
case where t h e e n t i r e t r a v e r s e guide (or t h e e n t i r e frame body)
is made of ceramics, t h e t r a v e r s e guide can be made l i g h t w e i g h t .
Therefore, theloadofthemotoradaptedtodrivethetraverseguide,
f o r example, can be suppressed.
In t h e above t r a v e r s e guide, a guide surface adapted t o guide
t h e yarn t o t h e yarn hooking groove is p r e f e r a b l y formed on each
of t h e arm body and t h e yarn guiding s e c t i o n . Since t h e guide
surface is formed on both t h e arm body and t h e yarn guiding s e c t i o n ,
t h e yarncanbeguidedtoproximityoftheyarnhookinggrooveduring
t h e catching of t h e yarn by t h e t r a v e r s e guide. Therefore, t h e
t r a v e r s e guide can r e l i a b l y catch t h e yarn.
17
According t o a second aspect of t h e p r e s e n t i n v e n t i o n , a
winding u n i t includes t h e t r a v e r s e guide, a t r a v e r s e guide d r i v i n g
s e c t i o n , and a c r a d l e . The t r a v e r s e guide i s adapted t o t r a v e r s e
t h e yarn while hooking t h e yarn with t h e yarn hooking groove. The
t r a v e r s e guide driving s e c t i o n is adapted t o d r i v e t h e t r a v e r s e
guide. The c r a d l e is adapted t o hold a package formed by t h e yarn
being t r a v e r s e d by t h e t r a v e r s e guide.
Since t h e l o a d a p p l i e d on t h e t r a v e r s e guide d r i v i n g s e c t i o n
can be reduced, t h e winding u n i t can t r a v e r s e t h e yarn a t high speed
by t h e t r a v e r s e guide. As a r e s u l t , production e f f i c i e n c y of t h e
winding u n i t can be improved.
According t o a t h i r d aspect of t h e p r e s e n t i n v e n t i o n , a yarn
windingmachine includes a pluralityofwindingunits. The package
can be e f f i c i e n t l y formed by t h e p l u r a l i t y of winding u n i t s .

WE CLAIM
1. A traverse guide comprising:
an arm body including a frame body on which a mounting groove
is formed, the mounting groove being arranged on a first end among
ends in a longitudinal direction of the arm body and opened in a
direction towards a second end, the second end being an opposite
end with respect to the first end in the longitudinal direction,
and
a yarn guiding section made of ceramics arranged on a groove
wall of the frame body and on which a yarn hooking groove is formed
to be opened in a direction towards the second end.
2. The traverse guide according to claim 1, wherein the arm
body and the yarn guiding section are adhered by adhesive.
3. The traverse guide according to claim 2, wherein the arm
body and the yarn guiding section are adhered by the adhesive such
that the adhesive covers a boundary between the mounting groove
and the yarn guiding section.
4. The traverse guide according to anyone of claimlthrough
claim 3, wherein a positioning section adapted to position the yarn
guiding section with respect to the arm body is formed on the arm
body.
5. The traverse guide according to claim 4, wherein the
positioning section is formed such that the yarn guiding section
is inserted into the mounting groove from one side in a thickness
direction of the arm body.
6. The traverse guide according to anyone of claimlthrough
claim 5, wherein the yarn hooking groove is formed in an elongate
shape with one end opened, and a longitudinal direction of the
elongate yarn hooking groove coincides with a longitudinal
19
ziirection of t h e arm body.
7. The t r a v e r s e guide according t o anyone of c l a i m l t h r o u g h
claim 6, wherein m a t e r i a l of t h e arm body includes a t l e a s t one
of magnesium a l l o y , aluminum a l l o y , and r e s i n .
8. The t r a v e r s e guide according t o anyone of c l a i m l t h r o u g h
claim 7, wherein a guide surface adapted t o guide a yarn t o t h e
yarn hooking groove is formed on each of t h e arm body and t h e yarn
guiding s e c t i o n .
9. A winding u n i t comprising:
t h e t r a v e r s e guide according t o any one of claim 1 through
claim 8, t h e t r a v e r s e guide being adapted t o t r a v e r s e a yarn while
hooking t h e yarn with t h e yarn hooking groove,
a t r a v e r s e guide driving sectionadaptedtodrivethetraverse
guide, and
a c r a d l e adapted t o hold a package formed by t h e yarn being
t r a v e r s e d by t h e t r a v e r s e guide.
10. Ayarnwindingmachine comprising a p l u r a l i t y of winding
u n i t s according t o claim 9.
11. A t r a v e r s e guide, s u b s t a n t i a l l y a s herein described
with reference t o accompanying drawings and example.
12. Awinding u n i t , s u b s t a n t i a l l y a s herein d e s c r i b e d w i t h
r e f e r e n c e t o accompanying drawings and example.
Dated this O Sd~ay of June 2012
Of Anand
Agents for the Applicants