YARN WINDING MACHINE AND YARN WINDING METHOD
BACKGROUND OF THE INVENTION
1. Field of the Invention
5 The present invention relates to a yarn winding
machine adapted to wind a yarn into a package, and a yarn
winding method.
2. ~escri~tioonf the Related Art
10 A conventional yarn winding machine that is known
includes a yarn joining device adapted to join a yarn from
a supplying side and a yarn from a winding side when the
yarn is disconnected (including cases of when the yarn is
disconnected to remove a yarn defect and when the yarn is
15 unexpectedly disconnected) (see e.g., Japanese Unexamined
Patent Publication No. 2007-284812).
BRIEF SUMMARY OF THE INVENTION
It is an object of the present invention to provide
20 a yarn winding machine and a yarn winding method capable
of appropriately joining yarns.
This object is achieved by a yarn winding machine
accordingto claiml, andbya yarnwindingmethodaccording
to claim 9.
2 5 With regard tothe conventional yarn winding machine
described above, it has been found out that, when the
rotation of the package is stopped after guiding the yarn
from the winding side to the yarn joining device, the yarn
from the winding side may break or drawbacks may occur in
30 joining the yarn from the supplying side and the yarn from
the winding side at the time of the yarn joining operation
by t h e yarn j o i n i n g device.
A yarn winding machine comprises a yarn supplying
device adapted t o supply a yarn; a winding device adapted
t o forwardly r o t a t e a package and t o wind t h e yarn i n t o t h e
5 package; a yarn j o i n i n g d e v i c e adapted t o perform a yarn
j o i n i n g o p e r a t i o n t o join t h e yarn from t h e yarn supplying
device and t h e yarn from t h e winding device upon
disconnection of t h e yarn; a yarn guiding device adapted
t o perform a yarn guiding o p e r a t i o n t o guide t h e yarn from
10 t h e yarn supplying device and t h e yarn from t h e winding
d e v i c e u p o n d i s c o n n e c t i o n o f t h e yarn; a n d a c o n t r o l s e c t i o n
a d a p t e d t o c o n t r o l thepackage t o b e r e v e r s e l y r o t a t e d a f t e r
a completion of t h e yarn guiding o p e r a t i o n by t h e yarn
guiding device and before a s t a r t of t h e yarn j o i n i n g
15 o p e r a t i o n by t h e yarn j o i n i n g device.
A yarn winding method f o r supplying a yarn and
forwardly r o t a t i n g a package t o wind t h e yarn i n t o t h e
package, t h e method comprises t h e s t e p s of a f i r s t s t e p of
performing a yarn guiding o p e r a t i o n f o r guiding t h e
20 supplied yarn and t h e wound yarn t o a yarn j o i n i n g device
forperformingayarnjoiningoperationtojointhe supplied
yarn and t h e wound yarn upon disconnection of t h e yarn; and
a second s t e p of r e v e r s e l y r o t a t i n g t h e package a f t e r a
c o m p l e t i o n o f t h e yarn guidingoperationandbefore a s t a r t
25 of t h e yarn j o i n i n g o p e r a t i o n by t h e yarn j o i n i n g device.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a f r o n t view of a spinning machine, which
is a yarn winding machine, according t o one embodiment of
30 t h e present invention;
FIG. 2 is a s i d e view of a spinning u n i t , which is
a yarn winding unit, according to one embodiment of the
present invention;
FIG. 3 is a timing chart illustrating an operation
of the spinning unit from a middle of a yarn guiding
5 operation to a completion of the yarn joining operation;
FIG. 4 is a side view of the spinning unit at the time
of yarn disconnection;
FIG. 5 is a side view of the spinning unit during the
yarn guiding operation;
10 FIG. 6 is a side view of the spinning unit at the
completion of the yarn guiding operation;
FIG. 7 is a side view of the spinning unit at the time
of reversal-rotation of the package; and
FIG. 8 is a side view of the spinning unit during the
15 yarn joining operation.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Preferred embodiments of the present invention will
be hereinafter described in detail with reference to the
20 drawings. Inthedrawings, the same referencenumerals are
denoted for the same or corresponding portions, and
redundant description will be omitted.
As illustrated in FIG. 1, a spinning machine (yarn
winding machine) 1 includes a plurality of spinning units
25 (yarn winding units) 2, a yarn joining carrier 3, a blower
box 4, and a motor box 5. Each spinning unit 2 is adapted
to produce a yarn Y and to wind the yarn Y into a package
P. The yarn joining carrier 3 travels among the plurality
of spinning units 2 arranged in a line. The blower box 4
30 accommodates an air supply source, and the like for
generating a suction flow, a whirling airflow, or the like
at each section of the spinning unit 2. The motor box 5
accommodates a motor, and the like for supplying a power
to each section of the spinning unit 2. A unit controller
(control section) 10 is arranged in each spinning unit 2.
5 The unit controller 10 controls the operation of the
spinning unit 2 while communicating with a higher-level
controller (higher-level control section) (not
illustrated).
As illustrated in FIG. 1 and FIG. 2, each spinning
10 unit 2 includes a draft device (yarn supplying device) 6,
a spinning device (yarn supplying device) 7, a yarn clearer
8, a tension sensor 9, a yarn accumulating device 11, a
waxingdevice 12, andawindingdevice 13 in this order from
the upstream. Each device is directly or indirectly
15 supported by a frame 19 such that the upstream is the upper
side e , downstream is the lower side) in a machine
height direction. In the present embodiment, in a path
where the yarn Y travels (i.e., a yarn path), a side where
the yarn Y is produced is referred to as upstream and a side
20 where the yarn Y is wound is referred to as downstream.
The draft device 6 drafts a sliver S to generate a
fiber bundle F (i. e., drafts the fiber bundle F) . The draft
device 6 include a back roller pair 14, a third roller pair
15, a middle roller pair 17 provided with an apron belt 16,
25 anda frontrollerpair18. Thebottomrollers ofthe roller
pairs 14, 15, 17, and 18 are driven at different rotation
speedsby the power fromthemotorbox 5 or anelectricmotor
(not illustrated) arranged for every spinning unit 2. The
draft device 6 thus drafts the sliver S supplied from the
30 upstream to generate the fiber bundle F, and supplies the
fiber bundle F to the downstream spinning device 7.
The spinning device 7 is an a i r - j e t s p i n n i n g d e v i c e
a d a p t e d t o p r o d u c e t h e y a r n Y b y a p p l y i n g t w i s t s t o t h e f i b e r
bundle F with a whirling a i r f l o w . More s p e c i f i c a l l y (but
n o t i l l u s t r a t e d ) , t h e s p i n n i n g d e v i c e 7 i n c l u d e s a spinning
5 chamber, a f i b e r guiding s e c t i o n , a w h i r l i n g a i r f l o w
g e n e r a t i o n n o z z l e , andahollowguideshaftbody. The f i b e r
guiding s e c t i o n is adapted t o guide t h e f i b e r bundle F
supplied from t h e upstream d r a f t device 6 t o t h e spinning
chamber. The whirling a i r f l o w g e n e r a t i o n nozzle is
10 arrangedataperipheryofthepathonwhichthe f i b e r b u n d l e
F t r a v e l s , and generates a w h i r l i n g a i r f l o w i n t h e spinning
chamber. This whirling a i r f l o w causes t h e f i b e r end o f t h e
f i b e r bundle F guided i n t o t h e spinning chamber t o be
i n v e r t e d and whirled. The hollow guide s h a f t body is
15 adapted t o guide t h e spun yarn Y t o t h e o u t s i d e of t h e
s p i n n i n g d e v i c e 7 from t h e spinning chamber.
The yarn c l e a r e r 8 d e t e c t s t h e yarn d e f e c t of t h e
t r a v e l l i n g y a r n y b e t w e e n t h e s p i n n i n g d e v i c e 7 a n d t h e yarn
accumulating device 11. The yarn c l e a r e r 8 d e t e c t s , f o r
20 example, t h i c k n e s s a b n o r m a l i t y o f t h e yarnY and/or foreign
substances contained i n t h e yarn Y a s t h e yarn d e f e c t . The
tension sensor 9 is adapted t o measure a t e n s i o n of t h e
t r a v e l l i n g y a r n y b e t w e e n t h e s p i n n i n g d e v i c e 7 a n d t h e yarn
accumulating device 11. The waxing device 12 is adapted
25 t o apply wax t o t h e t r a v e l l i n g yarn Y between t h e yarn
accumulating device 11 and t h e winding device 13.
The yarn accumulating device 11 is adapted t o
accumulate t h e t r a v e l l i n g yarn Y between t h e spinning
device 7 and t h e winding device 13. The yarn accumulating
30 device 11 has a f u n c t i o n of s t a b l y p u l l i n g out t h e yarn Y
from t h e s p i n n i n g d e v i c e 7, a f u n c t i o n of accumulating t h e
yarn Y fed from t h e s p i n n i n g d e v i c e 7 t o prevent t h e yarn
Y from s l a c k e n i n g d u r i n g t h e yarn j o i n i n g operation, and
a function of a d j u s t i n g t h e tension of t h e yarn Y from t h e
winding device 13 t o p r e v e n t a f l u c t u a t i o n i n t h e tension
5 of t h e yarn Y from t h e winding device 13 from propagating
toward t h e spinning device 7.
The winding device 13 forwardly r o t a t e s t h e package
P t o w i n d t h e y a r n Y i n t o a package P and forms a fully-wound
package P. The winding device 13 includes a c r a d l e arm 21,
10 a winding drum 22, and a t r a v e r s e device 23. The c r a d l e
a r m 2 1 i s swingablysupportedbya supporting s h a f t 2 4 . The
c r a d l e arm 21 brings a s u r f a c e of a r o t a t a b l y - s u p p o r t e d
bobbin B or a s u r f a c e of t h e package P ( i . e . , t h e bobbin
B wound with t h e yarn Y) i n t o contact with t h e s u r f a c e of
15 thewindingdrum22 a t a n a p p r o p r i a t e p r e s s u r e . Thewinding
drum 22 is driven by a d r i v i n g source (not i l l u s t r a t e d )
commonly arranged f o r a p l u r a l i t y of spinning u n i t s 2 t o
forwardly r o t a t e t h e package P making contact with t h e
winding drum 22. The t r a v e r s e device 23 is driven through
20 a s h a f t 25 shared among t h e p l u r a l i t y of spinning u n i t s 2,
and t r a v e r s e s t h e yarn Y over a p r e s c r i b e d width with
r e s p e c t t o t h e forwardly r o t a t i n g package P.
The yarn j o i n i n g c a r r i e r 3 t r a v e l s among t h e
p l u r a l i t y of spinning u n i t s 2 arranged i n a l i n e t o join
25 t h e disconnected yarn Y i n each spinning u n i t 2. The yarn
j o i n i n g c a r r i e r 3 includes a s p l i c e r (yarn j o i n i n g device)
26, a s u c t i o n p i p e ( y a r n g u i d i n g d e v i c e ) 27, a suctionmouth
( y a r n g u i d i n g d e v i c e ) 28, anda reversal-rotationmechanism
29. In t h e yarn j o i n i n g c a r r i e r 3, t h e s u c t i o n pipe 27 is
30 swingably supported by a supporting s h a f t 31, and t h e
suction mouth 28 is swingably supported by a supporting
shaft 32.
The splicer 26 performs the yarn joining operation
of joining the yarn Y from the spinning device 7 and the
yarn Y from the winding device 13 upon disconnection of the
5 yarn Y. The suction pipe 27 sucks and catches a yarn end
of the yarn Y fed from the spinning device 7 and guides the
yarn Y from the spinning device 7 to the splicer 26 upon
disc'onnection of the yarn Y. The suction mouth 28 sucks
and catches a yarn end of the yarn Y from the winding device
10 13 and guides the yarn Y from the winding device 13 to the
splicer 26 upon disconnection ofthe yarn Y. That is, upon
disconnection of the yarn Y, the suction pipe 27 and the
suction mouth 28 perform the yarn guiding operation of
guiding the yarn Y from the spinning device 7 and the yarn
15 Y from the winding device 13 to the splicer 26. When the
cradle arm 21 is swung so as to separate the package P from
the winding drum 22, the reversal-rotation mechanism 29
brings the surface of a reversal-rotation roller 29a into
contact with the surface of the package P at an appropriate
20 pressure to reversely rotate the package P.
Next, with reference to the timing chart of FIG. 3,
a description will be made on the operation of the spinning
unit 2 of when the yarn Y is disconnected (yarn winding
method performed by the spinning unit 2). A case in which
25 the yarn Yis disconnected includes a case in which the yarn
Y is disconnected to remove the yarn defect and a case in
which the yarn Y is unexpectedly disconnected.
When the yarn Y is disconnected to remove the yarn
defect, the unit controller 10 determines that the yarn Y
30 is disconnectedbyperformingthe control to disconnect the
y a r n Y b y t h e u n i t c o n t r o l l e r 1 0 i t s e l f . Morespecifically,
when receiving a yarn defect detection signal fromthe yarn
clearer 8 while the yarnYis beingproducedandbeingwound
into the package PI the unit controller 10 stops the
operations of the draft device 6 and the spinning device
5 7 to disconnect the yarn Y. At this timing, the unit
controller 10 determines that the yarn Y is disconnected.
When the yarn Y is unexpectedly disconnected, the unit
controller 10 determines that the yarn Y is disconnected
based on a yarn detection signal transmitted from a yarn
10 travelling sensor (not illustrated) arranged at a
predetermined position on the yarn path. In this case as
well, the unit controller 10 stops the operations of the
draft device 6 and the spinning device 7.
As illustratedin FIG. 4, whenadeterminationismade
15 that the yarn Y is disconnected, the unit controller 10
swings the cradle arm 21 after the yarn Y from the winding
device 13 is wound into the package PI and operates a brake
mechanism (not illustrated) arranged on the cradle arm 21.
The forward rotation of the package P is thereby stopped
20 with the package P separated from the winding drum 22. The
unit controller 10 then transmits to the yarn joining
carrier 3, a control signal indicating the spinning unit
2 of which the determination has been made that the yarn
Yis disconnected. The yarn joining carrier 3thustravels
25 to the front of the relevant spinning unit 2 and stops
thereat.
As illustrate din FIG. 5, the suctionpipe 27 is swung
towardthedownstreamofthe spinningdevice 7 andgenerates
the suction flow. Since the unit controller 10 resumes the
30 operations of the draft device 6 and the spinning device
7 at this point of time, the suction pipe 27 can suck and
catch the yarn end of the produced spun yarn Y. The suction
pipe 27 is then swung to a predetermined position before
returning tothe original position (standby position), and
performs the yarn guiding operation of guiding the yarn Y
5 from the spinning device 7 to the splicer 26.
Meanwhile, as illustrated in F I G . 5, the suction
mouth 28 is swungtoproximity ofthe surface ofthe package
P and generates the suction flow. At this point of time,
the reversal-rotation mechanism 29 brings the
10 reversal-rotation roller 29a into contact with the package
P and reversely rotates the package P at a first
reversal-rotation speed V1 (period to T1 of F I G . 3), and
thus the suction mouth 28 can suck and catch the yarn end
of the yarn Y-unwound from the package P. The suction mouth
15 28 is then swung to a predetermined position before
returning tothe original position (standby position), and
performs the yarn guiding operation of guiding the yarn Y
from the winding device 13 to the splicer 26. While the
suctionmouth 28 is performingthe yarn guiding operation,
20 the reversal-rotation mechanism 29 reversely rotates the
package P ata second reversal-rotation speedV2 lower than
the first reversal-rotation speed V1 (period from T2 to T3
of F I G . 3). As described above, the unit controller 10
performs control to reversely rotate the package P while
25 the suction mouth 28 is performing the: yarn guiding
operation (first step).
After the yarn guiding operationofthe suctionmouth
28 is completed, as illustrated in F I G . 6, the
reversal-rotation mechanism 29 once stops the
30 reversal-rotation of the package P (period from T4 to T5
of F I G . 3). Then, as illustrated in F I G . 7, the
r e v e r s a l - r o t a t i o n m e c h a n i s m 2 9 a g a i n r e v e r s e l y r o t a t e s t h e
package P a t a t h i r d r e v e r s a l - r o t a t i o n speed V3 lower than
t h e second r e v e r s a l - r o t a t i o n speed V2 (period from T6 t o
T7 of FIG. 3 ) . As described above, a f t e r t h e completion
5 of t h e yarn guiding operation by t h e s u c t i o n mouth 28 and
before t h e s t a r t of t h e yarn j o i n i n g o p e r a t i o n by t h e
s p l i c e r 26, t h e u n i t c o n t r o l l e r 1 0 performs c o n t r o l t o once
s t o p t h e r e v e r s a l - r o t a t i o n o f t h e p a c k a g e P a n d t o r e v e r s e l y
r o t a t e t h e package P again (second s t e p ) .
10 Next, a s i l l u s t r a t e d i n FIG. 8, when t h e
r e v e r s a l - r o t a t i o n mechanism 29 s t o p s t h e resumed
r e v e r s a l - r o t a t i o n o f t h e p a c k a g e P, t h e s p l i c e r 2 6 p e r f o r m s
t h e yarn j o i n i n g o p e r a t i o n ( p e r i o d from T8 t o T 1 1 of FIG.
3 ) . More s p e c i f i c a l l y , when moved by a p r e s c r i b e d amount
15 t o w a r d t h e y a r n p a t h , t h e s p l i c e r 2 6 o p e r a t e s y a r n g a t h e r i n g
l e v e r s 26a t o perform t h e yarn g a t h e r i n g o p e r a t i o n of t h e
yarn Y from t h e s p i n n i n g d e v i c e 7 and t h e yarn Y from t h e
winding d e v i c e 1 3 (period from T8 t o T9 of FIG. 3 ) . After
t h e yarn g a t h e r i n g o p e r a t i o n is completed ( t i m e p o i n t of
20 T9 of FIG. 3 ) , t h e s p l i c e r 26 disconnects t h e yarn Y from
t h e spinning device 7 and t h e yarnY fromthe winding device
13 a t a predetermined p o s i t i o n , and performs t h e yarn
j o i n i n g o p e r a t i o n of t h e yarn end of t h e yarn Y from t h e
spinning device 7 and t h e yarn end of t h e yarn Y from t h e
25 w i n d i n g d e v i c e 1 3 w i t h t h e o p e r a t i o n o f t h e w h i r l i n g a i r f l o w
(period from T9 t o TI0 of FIG. 3 ) . After t h e yarn joining
o p e r a t i o n is completed ( t i m e p o i n t of TI0 of FIG. 3 ) , t h e
s p l i c e r 26 operates t h e yarn g a t h e r i n g l e v e r s 26a and
cancels t h e yarn g a t h e r i n g o p e r a t i o n of t h e joined yarn Y
30 (period from TI0 t o T 1 1 of FIG. 3 ) .
After t h e yarn j o i n i n g o p e r a t i o n of t h e s p l i c e r 26
is completed (time point of TI1 of FIG. 3), the unit
controller 10 operates the suction pipe 27, the suction
mouth 28, and the reversal-rotation roller 29a to return
to the original position (standby position) of the yarn
5 joining carrier 3. As illustrated in FIG. 2, the unit
controller 10 then swings the cradle arm 21, brings the
package Pinto contact with the windingdrum22, and resumes
the winding by the winding device 13.
As described above, in the spinning unit 2, when the
10 yarn Y is disconnected, the package P is reversely rotated
after the completion of the yarn guiding operation by the
suction pipe 27 and the suction mouth 28, and before the
start of the yarn joining operation by the splicer 26.
Since the tension of the yarn Y from the winding device 13
15 is thus loosened, the yarn Y from the winding device 13 can
be suppressedfrombreakingorthedrawbacks are suppressed
from occurring in the yarn joining operation. With the
spinningmachine 1, the yarnY canbe appropriately joined.
In the spinning unit 2, the package P is reversely
20 rotated while the suction pipe 27 and the suction mouth 28
perform the yarn guiding operation, and the
reversal-rotation of the package P is once stopped and the
package P is reversely rotated again after the completion
of the yarn guiding operation by the suction pipe 27 and
25 the suctionmouth28 andbefore the start ofthe yarn joining
operation by the splicer 26. Since the reversal-rotation
of the package P is once stopped, the reversal-rotation
speed and/or reversal-rotation amount of when reversely
rotating the package P again can be easily controlled.
30 Inthe spinningunit2, whenthepackage Pis reversely
rotated after the completion of the yarn guiding operation
by the suction pipe 27 and the suction mouth 28 and before
the start of the yarn joining operation by the splicer 26,
the unit controller 10 can adjust at least one of the
reversal-rotation speed or the reversal-rotation amount of
5 the package P. The tension of the yarn Y from the winding
device 13 thus can be appropriately loosened according to
the diameter of the package P, type of the yarn Y, and/or
yarn count of the yarn Y, and the like.
As specific examples, the following adjustment is
10 made forthe reversal-rotation speed. As the suction force
of the suction mouth 28 becomes greater, the yarn Y is more
likely to easily break. Therefore, in such a case, the
reversal-rotation speed is made faster. As the yarn Y has
lower stretching properties, the yarn Y is more likely to
15 easily break. Therefore, in such a case, the
reversal-rotation speed is made faster. As the twist of
the yarn Y becomes stronger, a kink (a state in which the
yarn Y becomes frizzled and the yarn Y is wound to a spiral
form with the fiber of a part of the yarn Y as a central
20 core) is more likely to easily occur. Therefore, in such
a case, the reversal-rotation speed is made slower. As the
yarn Y becomes thinner, the yarn Y is more likely to easily
break. Therefore, in such a case, the reversal-rotation
speed ismade faster. The following adjustment ismade for
25 the reversal-rotation amount. As the diameter of the
package P becomes larger, the reversal-rotation amount is
increased to enable the reversal-rotation reliably. As
the yarn Y has lower stretching properties, the yarn Y is
more likely to easily break. Therefore, in such a case,
30 the reversal-rotation amount is increased. As the twist
of the yarn Y becomes stronger, the yarn Y is more likely
t o e a s i l y entangle when being slackened. Therefore, i n
such a c a s e , t h e r e v e r s a l - r o t a t i o n amount is reduced. As
t h e yarn Y becomes t h i n n e r , t h e yarn Y is more l i k e l y t o
e a s i l y break. Therefore, i n such a c a s e , t h e
5 r e v e r s a l - r o t a t i o n amount is increased.
The u n i t c o n t r o l l e r 10 s t o r e s information i n d i c a t i n g
t h e type of yarn Y t o be wound, and thus t h e u n i t c o n t r o l l e r
10 can a d j u s t a t l e a s t one of t h e r e v e r s a l - r o t a t i o n speed
o r t h e r e v e r s a l - r o t a t i o n amount of t h e package P based on
10 t h e s t o r e d information i n d i c a t i n g t h e type o f yarn Y. The
information i n d i c a t i n g t h e type of yarn Y t o be wound may
b e i n p u t t o t h e u n i t c o n t r o l l e r 1 0 b y t h e o p e r a t o r i n a d v a n c e
The u n i t c o n t r o l l e r 10 can d e t e c t t h e r o t a t i o n number of
t h e f r o n t r o l l e r p a i r 18 of t h e d r a f t device 6, and c a i c u l a t e
15 t h e diameter of t h e package P based on t h e d e t e c t i o n r e s u l t
o f t h e rotationnumber o f t h e f r o n t r o l l e r p a i r 1 8 , t h e time
from t h e s t a r t of winding of one package P, t h e information
i n d i c a t i n g t h e type of yarn Y, t h e diameter of t h e bobbin
B and t h e t r a v e r s e speed, and t h e l i k e . A sensor capable
20 ofdetectingthediameterofthepackage Pmaybe s e p a r a t e l y
arranged.
In t h e spinning u n i t 2, t h e yarn supplying device
adapted t o supply t h e yarn Y is configured by t h e ' d r a f t
device 6 and t h e s p i n n i n g d e v i c e 7. The s p i n n i n g d e v i c e
25 7 is an a i r - j e t spinning device adapted t o produce t h e yarn
Y by applying t w i s t s t o t h e f i b e r bundle F w i t h a whirling
a i r f l o w . A high q u a l i t y yarn Y thus can be e f f i c i e n c y
supplied.
In t h e spinning machine 1, t h e d r a f t device 6, t h e
30 spinning device 7, and t h e winding d e v i c e 1 3 a r e arranged
i n e a c h o f t h e p l u r a l i t y o f s p i n n i n g u n i t s 2, a n d t h e s p l i c e r
26, t h e suction pipe 27, and t h e s u c t i o n mouth 28 a r e
arranged i n t h e yarn j o i n i n g c a r r i e r 3 t h a t t r a v e l s among
t h e p l u r a l i t y of spinning u n i t s 2. Thus, t h e s p l i c e r 26,
t h e s u c t i o n p i p e 27, and t h e suction mouth 28 a r e shared
5 among t h e p l u r a l i t y of spinning u n i t s 2, whereby t h e
s t r u c t u r e of t h e spinning u n i t 2 can be s i m p l i f i e d . The
yarn j o i n i n g c a r r i e r 3 may be arranged i n p l u r a l s i n one
s p i n n i n g m a c h i n e 1 i n a c c o r d a n c e w i t h t h e n u m b e r o f s p i n n i n g
u n i t s 2.
10 One embodiment of t h e p r e s e n t i n v e n t i o n has been
described above, but t h e p r e s e n t i n v e n t i o n is not l i m i t e d
t o t h e above embodiment. For example, i n t h e embodiment
described above, each device is arranged i n t h e machine
height d i r e c t i o n such t h a t t h e yarnY supplied fromanupper
15 s i d e is wound a t t h e lower s i d e , but i n t h e yarn winding
u n i t and t h e yarn winding machine o f t h e present invention,
eachdevicemaybe arranged such t h a t t h e spun yarn supplied
from t h e lower s i d e is wound a t t h e upper s i d e . I n t h e
t r a v e l l i n g d i r e c t i o n of t h e yarn Y, t h e t e n s i o n sensor 9
20 may be arranged upstream of t h e yarn c l e a r e r 8. The u n i t
c o n t r o l l e r 10 may be arranged, not f o r each spinning u n i t
2, but f o r each group of t h e p l u r a l i t y of spinning u n i t s
2. A p a r t of o r a l l of t h e c o n t r o l described a s c o n t r o l
performed by t h e u n i t c o n t r o l l e r 10 may be c a r r i e d out by
25 o t h e r c o n t r o l l e r s such a s t h e high-order c o n t r o l l e r , and
t h e l i k e .
In t h e embodiment described above, t h e brake
mechanism arranged on t h e c r a d l e arm 21 is used t o s t o p t h e
forward r o t a t i o n of t h e package P, b u t a package stopping
30 mechanismarrangedinthe yarn j o i n i n g c a r r i e r 3maybe used.
In t h i s case, i n t h e spinning u n i t 2, t h e c r a d l e arm 21 is
f i r s t swung and t h e package P is separated away from t h e
winding drum 22. A t t h i s t i m e , t h e package P continues t o
forwardly r o t a t e through i n e r t i a . The yarn j o i n i n g
c a r r i e r 3 t h e n t r a v e l s t o t h e f r o n t o f t h e r e l e v a n t spinning
5 u n i t 2 and s t o p s t h e r e a t . The yarn j o i n i n g c a r r i e r 3 then
swings t h e package stopping mechanism t o be brought i n t o
contact with t h e package P, thus stopping t h e forward
r o t a t i o n of t h e package P.
In t h e embodiment described above, t h e u n i t
10 c o n t r o l l e r 10 c o n t r o l s t h e yarn j o i n i n g c a r r i e r 3, but a
c a r r i e r c o n t r o l l e r ( c a r r i e r c o n t r o l s e c t i o n ) arranged
s e p a r a t e from t h e u n i t c o n t r o l l e r 10 may c o n t r o l t h e yarn
j o i n i n g c a r r i e r 3. In t h i s case, a yarn j o i n i n g request
s i g n a l is f i r s t t r a n s m i t t e d from t h e u n i t c o n t r o l l e r 10 t o
15 thehigh-order controller. Thehigh-order controllerthat
received t h e yarn j o i n i n g request s i g n a l i n s t r u c t s t h e
c a r r i e r c o n t r o l l e r t o perform t h e yarn j o i n i n g o p e r a t i o n
i n t h e s p i n n i n g u n i t 2 i n c l u d i n g t h e u n i t c o n t r o l l e r 1 0 t h a t
t r a n s m i t t e d t h e yarn j o i n i n g request s i g n a l . The c a r r i e r
20 c o n t r o l l e r then c o n t r o l s t h e s u c t i o n p i p e 27, t h e suction
mouth 28, t h e s p l i c e r 26, and t h e l i k e t o perform t h e yarn
j o i n i n g o p e r a t i o n i n t h e r e l e v a n t spinning u n i t 2.
In t h e embodiment described above, t h e yarn
accumulating device 11 has a function of p u l l i n g out t h e
25 yarn Y from t h e spinning device 7. In t h e yarn winding u n i t
and t h e yarn winding machine of t h e present invention, t h e
yarnmaybepulledoutwithadeliveryrollerandaniproller
from t h e yarn supplying device adapted t o supply t h e yarn.
In t h e embodimentdescribedabove, t h e d i s c o n n e c t i o n o f t h e
30 y a r n y a t t h e t i m e o f d e t e c t i n g t h e yarn d e f e c t is performed
by t h e s t o p of t h e whirling a i r f l o w i n t h e spinning device
7 . In t h e yarn winding u n i t and t h e yarn winding machine
of t h e present invention, t h e disconnection of t h e yarn a t
t h e time of d e t e c t i n g t h e yarn d e f e c t may be performed with
a c u t t e r .
5 Intheembodimentdescribedabove, t h e yarn supplying
device adapted t o supply t h e yarn Y is configured by t h e
d r a f t d e v i c e 6 and t h e spinning device 7. Other yarn
supplying devices such a s a yarn supplying device
configured t o supply t h e yarn from a bobbin, around which
10 t h e yarn is wound, may be applied t o t h e yarn winding u n i t
and t h e yarn winding machine of t h e present invention.
I f t h e s p i n n i n g d e v i c e i s t h e a i r - j e t s p i n n i n g d e v i c e ,
. t h e spinning device may f u r t h e r i n c l u d e a needle held by
t h e f i b e r guiding s e c t i o n a n d a r r a n g e d t o protrude i n t o t h e
15 spinning chamber t o prevent t h e t w i s t s of t h e f i b e r bundle
from being propagated toward t h e upstream of t h e spinning
device. In place of t h e needle, t h e spinning device may
prevent t h e t w i s t s o f t h e f i b e r b u n d l e frombeingpropagated
toward t h e upstream of t h e s p i n n i n g d e v i c e by a downstream
20 end of t h e f i b e r guiding s e c t i o n . The s p i n n i n g d e v i c e may
i n c l u d e a p a i r of a i r - j e t nozzles adapted t o apply t w i s t s
i n opposite d i r e c t i o n s from each o t h e r .
In t h e embodimentdescribedabove, a t l e a s t a p o r t i o n
of t h e bottom r o l l e r s of t h e d r a f t device 6 and t h e s h a f t
25 25 of t h e t r a v e r s e device 23 a r e driven by t h e power from
t h e motor box 5 ( e . , common among t h e p l u r a l i t y of
spinning u n i t s 2 ) . Each s e c t i o n ( e . g . , t h e d r a f t device
6, t h e s p i n n i n g d e v i c e 7, t h e winding device 13, etc. ) of
t h e spinning u n i t 2 may be driven independently f o r each
30 spinning u n i t 2.
In t h e embodiment described above, t h e u n i t
c o n t r o l l e r 10 c o n t r o l s t h e r e v e r s a l - r o t a t i o n mechanism 29
t o r e v e r s e l y r o t a t e t h e package P a f t e r t h e completion of
t h e yarn guiding o p e r a t i o n by t h e s u c t i o n p i p e 27 and t h e
suction mouth 28 and before t h e yarn j o i n i n g o p e r a t i o n by
5 t h e s p l i c e r 26. The p r e s e n t i n v e n t i o n is not l i m i t e d
t h e r e t o . I f t h e winding device 13 is driven independently
f o r e a c h s p i n n i n g u n i t 2 , t h e u n i t c o n t r o l l e r 1 0 m a y c o n t r o l
t h e winding device 13 t o r e v e r s e l y r o t a t e t h e package P
a f t e r t h e completion of t h e yarn guiding o p e r a t i o n by t h e
10 s u c t i o n p i p e 2 7 a n d t h e suctionmouth28 andbefore t h e s t a r t
o f t h e yarn j o i n i n g o p e r a t i o n b y t h e s p l i c e r 26. In e i t h e r
c o n f i g u r a t i o n , t h e p a c k a g e Pcanbeappropriatelyreversely
r o t a t e d .
In t h e embodiment described above, a f t e r t h e
15 c o m p l e t i o n o f t h e yarn j o i n i n g o p e r a t i o n b y t h e suction pipe
27 and t h e suction mouth 28 and before t h e s t a r t of t h e yarn
j o i n i n g o p e r a t i o n by t h e s p l i c e r 26, t h e r e v e r s a l - r o t a t i o n
of t h e package P is once stopped and then t h e package P is
r e v e r s e l y r o t a t e d again. The present invention is not
20 l i m i t e d t h e r e t o . The package P may be continued t o
r e v e r s e l y r o t a t e while g r a d u a l l y reducing t h e
r e v e r s a l - r o t a t i o n speed, f o r example, from while t h e
suction pipe 27 and t h e s u c t i o n mouth 28 a r e performing t h e
yarn guiding o p e r a t i o n u n t i l t h e s p l i c e r 26 s t a r t s t h e yarn
25 j o i n i n g o p e r a t i o n .
In t h e embodiment described above, t h e
r e v e r s a l - r o t a t i o n of t h e package P a f t e r t h e completion of
t h e yarn j o i n i n g o p e r a t i o n by t h e s u c t i o n pipe 27 and t h e
suction mouth 28 and before t h e s t a r t of t h e yarn joining
30 o p e r a t i o n by t h e s p l i c e r 26 is stopped before t h e yarn
gathering o p e r a t i o n of t h e yarn Y by t h e yarn gathering
levers 26a. The present invention is not limited thereto.
The reversal rotation of the package P may be stopped after
the yarn gathering operation of the yarn Y by the yarn
gathering levers 26a and before the yarn joining operation
5 of the yarn ends by the splicer 26.
A yarn winding machine includes a yarn supplying
device adapted to supply a yarn; a winding device adapted
to forwardly rotate a package and to wind the yarn into the
package; a yarn joining device adapted to perform a yarn
10 joining operation to join the yarn from the yarn supplying
device and the yarn from the winding device upon
disconnection of the yarn; a yarn guiding device adapted
to perform a yarn guiding operation to guide the yarn from
the yarn supplying device and the yarn from the winding
15 device tothe yarn joining device upon disconnection ofthe
yarn; and a control section adapted to control the package
to be reversely rotated after a completion of the yarn
guiding operation by the yarn guiding device and before a
start of the yarn joining operation by the yarn joining
20 device.
When the yarn is disconnected (including cases of
when the yarn is disconnected to remove a yarn defect and
when the yarn is unexpectedly disconnected), the package
is reversely rotated after the completion of the yarn
25 guiding operationby the yarn guiding device andbefore the
start of the yarn joining operation by the yarn joining
device. The tension of the yarn from the winding device
thusbecomes loose, wherebytheyarnfromthewindingdevice
can be suppressed from breaking and the drawbacks can be
30 s u p p r e s s e d f r o m o c c u r r i n g d u r i n g t h e y a r n j o i n i n g o p e r a t i o n .
The yarn thus can be appropriately joined.
The yarn winding machine f u r t h e r i n c l u d e s a
r e v e r s a l - r o t a t i o n mechanism adapted t o r e v e r s e l y r o t a t e
t h e package; wherein t h e c o n t r o l s e c t i o n may be adapted t o
c o n t r o l t h e r e v e r s a l - r o t a t i o n mechanism t o r e v e r s e l y
5 r o t a t e t h e package a f t e r t h e completion o f t h e yarn guiding
o p e r a t i o n by t h e yarn guiding device and before t h e s t a r t
of t h e yarn j o i n i n g operation by t h e yarn j o i n i n g device.
A l t e r n a t i v e l y , t h e c o n t r o l s e c t i o n may be adapted t o
c o n t r o l t h e winding device t o r e v e r s e l y r o t a t e t h e package
10 a f t e r t h e completion of t h e yarn guiding o p e r a t i o n by t h e
y a r n g u i d i n g d e v i c e a n d b e f o r e t h e s t a r t o f t h e yarn joining
o p e r a t i o n b y t h e yarn j o i n i n g device. The package thus can
be a p p r o p r i a t e l y r e v e r s e l y r o t a t e d .
Duringthe yarnguidingoperationbythe yarn guiding
15 device, t h e c o n t r o l s e c t i o n may be adapted t o r e v e r s e l y
r o t a t e t h e package, and a f t e r t h e completion of t h e yarn
guiding o p e r a t i o n b y t h e yarn guiding device a n d b e f o r e t h e
s t a r t of t h e yarn j o i n i n g o p e r a t i o n by t h e yarn joining
device, t h e c o n t r o l s e c t i o n may be adapted t o once s t o p
20 r e v e r s a l - r o t a t i o n of t h e package and then t o r e v e r s e l y
r o t a t e t h e package again. Since t h e r e v e r s a l - r o t a t i o n of
t h e package is once stopped, t h e r e v e r s a l - r o t a t i o n speed
and/or reversal-rotationamount ofwhen r e v e r s e l y r o t a t i n g
t h e package again can be e a s i l y c o n t r o l l e d .
25 When c o n t r o l l i n g t h e package t o b e r e v e r s e l y r o t a t e d ,
t h e c o n t r o l s e c t i o n may be adapted t o a d j u s t a t l e a s t one
ofareversal-rotationspeedandareversal-rotationamount
of t h e package. The tension of t h e yarn from t h e winding
device can be a p p r o p r i a t e l y loosened according t o t h e
30 diameter o f t h e p a c k a g e , type o f t h e yarn, a n d / o r y a r n c o u n t
of t h e yarn, and t h e l i k e .
The yarn supplying device may include a d r a f t device
adapted t o d r a f t a f i b e r bundle, and a s p i n n i n g d e v i c e
adapted t o apply t w i s t s t o t h e f i b e r bundle and t o generate
t h e yarn. A high q u a l i t y yarn thus can be e f f i c i e n c y
5 supplied.
The spinningdevicemaybe a n a i r - j e t spinning device
adapted t o apply t h e t w i s t s t o t h e f i b e r bundle and t o
generate t h e yarn by a w h i r l i n g a i r f l o w . A higher q u a l i t y
yarn thus can be e f f i c i e n t l y supplied.
10 The yarn winding machine may f u r t h e r include a
p l u r a l i t y of yarn winding u n i t s , each winding u n i t
i n c l u d i n g t h e yarn supplyingdevice andthewinding device;
and a t l e a s t one yarn j o i n i n g c a r r i e r i n c l u d i n g t h e yarn
j o i n i n g device and t h e yarn guiding d e v i c e . The yarn
15 j o i n i n g device and t h e yarn guiding device can be shared
a m o n g t h e p l u r a l i t y o f y a r n w i n d i n g u n i t s , t h u s simplifying
t h e s t r u c t u r e of t h e yarn winding u n i t .
A yarn winding method is a yarn winding method f o r
supplying a yarn and forwardly r o t a t i n g a package t o wind
20 t h e yarn i n t o t h e package, t h e m e t h o d i n c l u d i n g a f i r s t s t e p
and a second s t e p . In t h e f i r s t s t e p , a yarn guiding
o p e r a t i o n f o r guiding a supplied yarn and a wound yarn t o
a yarn j o i n i n g device f o r performing a yarn j o i n i n g
o p e r a t i o n t o j o i n t h e supplied yarn and t h e wound yarn is
25 performed upon disconnection of t h e yarn. In t h e second
s t e p , t h e package is r e v e r s e l y r o t a t e d a f t e r a completion
o f t h e yarn guiding o p e r a t i o n a n d b e f o r e a s t a r t o f t h e yarn
j o i n i n g o p e r a t i o n by t h e yarn j o i n i n g device. Similar t o
t h e yarn winding machine described above, t h e yarn can be
30 a p p r o p r i a t e l y joined.

WE CLAIM
1. A yarn winding machine comprising:
a yarn supplying device adapted to supply a yarn;
a winding device adapted to forwardly rotate a
5 package and to wind the yarn into the package;
a yarn joining device adapted to perform a yarn
joining operation to join the yarn from the yarn supplying
device and the yarn from the winding device upon
disconnection of the yarn;
10 a yarn guiding device adapted to perform a yarn
guiding operation to guide the yarn fromthe yarn supplying
device and the yarn from the winding device upon
disconnection of the yarn; and
a control section adapted to control the package to
15 be reversely rotated after a completion of the yarn guiding
operation by the yarn guiding device and before a start of
the yarn joining operation by the yarn joining device.
2. The yarn winding machine according to claim 1,
20 further comprising a reversal-rotation mechanism adapted
to reversely rotate the package;
wherein the control section is adaptedto control the
reversal-rotation mechanism to reversely rotate the
package after the completion of the yarn guiding operation
25 by the yarn guiding device and before the start of the yarn
joining operation by the yarn joining device.
3. The yarn winding machine according to claim 1,
wherein the control section is adapted to control the
30 winding device to reversely rotate the package after the
completionoftheyarnguidingoperationbytheyarnguiding
device and before the start of the yarn joining operation
by the yarn joining device.
4. The yarn winding machine according to any one of
5 claim 1 through claim 3, wherein during the yarn guiding
operation by the yarn guiding device, the control section
is adapted to reversely rotate the package, and
after the completion of the yarn guiding operation
by the yarn guiding device and before the start of the yarn
10 joining operation by the yarn joining device, the control
section is adapted to once stop reversal-rotation of the
package and then to reversely rotate the package again.
5. The yarn winding machine according to any one of
15 claim 1 through claim 4, wherein when controlling the
package to be reversely rotated, the control section is
adapted to adjust at least one of a reversal-rotation speed
and a reversal-rotation amount of the package.
20 6. The yarn winding machine according to any one of
claim 1 through claim 5, wherein the yarn supplying device
includes a draft device adapted to draft a fiber bundle,
and a spinning device adapted to apply twists to the fiber
bundle and to generate the yarn.
25
7. The yarn winding machine according to any one of
claim 6, wherein the spinning device is an air-jet spinning
device adapted to apply the twists to the fiber bundle and
to generate the yarn by a whirling airflow.
30
8. The yarn winding machine according to any one of
claim 1 through claim 7, f u r t h e r comprising:
a p l u r a l i t y of yarn winding u n i t s , each winding u n i t
i n c l u d i n g t h e yarn supplyingdeviceandthewindingdevice ;
and
5 a t l e a s t one yarn j o i n i n g c a r r i e r including t h e yarn
j o i n i n g device and t h e yarn guiding d e v i c e .
9. A yarn winding method f o r supplying a yarn and
forwardly r o t a t i n g a package t o wind t h e yarn i n t o t h e
10 package, t h e method comprising t h e s t e p s of:
a f i r s t s t e p o f performing a yarn guiding operation
f o r guiding t h e supplied yarn and t h e wound yarn t o a yarn
j o i n i n g device f o r performing a yarn j o i n i n g o p e r a t i o n t o
j o i n t h e suppliedyarnandthewoundyarnupondisconnection
15 of t h e yarn; and
a second s t e p o f r e v e r s e l y r o t a t i n g t h e p a c k a g e a f t e r
a completion of t h e yarn guiding o p e r a t i o n and before a
s t a r t of t h e yarn j o i n i n g o p e r a t i o n by t h e yarn j o i n i n g
device.
20
10. Ayarnwindingmachine, s u b s t a n t i a l l y a s h e r e i n
described with r e f e r e n c e to accompanying drawings and
examples.
25 11. A yarn winding method, s u b s t a n t i a l l y a s herein
described with r e f e r e n c e t o accompanying drawings and
examples.