WINDING DEVICE AND YARN WINDING MACHINE INCLUDING THE SAME
BACKGROUND OF THE INVENTION
1. Field of the Invention
5 The present invention relatesto a winding device and
a yarn winding machine including the same.
2. Description of the Related Art
As a conventional textile machine, for example,
Japanese Patent Application Laid-open No. 2011-37608
10 discloses a textile machine including a winding device
adapted to wind a yarn around a bobbin held by a package
holding section to form a package. The winding device
includes the package holding section adapted to rotatably
support the bobbin or a package, a contact roller adapted
15 to rotatethepackagewhilemakingcontactwiththepackage,
and a switching mechanism (a drive mechanism) adapted to
move a position of the package by swinging the package
holding section with a swinging shaft as a center. When
an accumulation amount of a yarn accumulating device
20 arranged upstream of the winding device becomes less than
a predetermined amount, the switching mechanism is
controlled tomove the package holding section to a receded
position located away from the contact roller.
Accordingly, since a winding speed of the package is
25 decelerated, the accumulation amount in the yarn
accumulating device can be increased.
SUMMARY OF THE INVENTION
In such a winding device, if the package holding
30 section is not moved away from the contact roller at a
predetermined timing, since an appropriate accumulation
amountwouldnot be s e c u r e d i n t h e y a r n a c c u m u l a t i n g d e v i c e ,
adefectivepackagemaybeproduced. I f t h e p a c k a g e h o l d i n g
s e c t i o n is not moved away from t h e c o n t a c t r o l l e r by a
predetermined d i s t a n c e , a d e f e c t may be g e n e r a t e d on a
5 s u r f a c e of t h e package, f o r example, a scrambled package
may be formed. Therefore, a s t a b l e o p e r a t i o n of t h e
s w i t c h i n g mechanism i s demanded. The s t a b l e o p e r a t i o n of
t h e s w i t c h i n g mechanism i n c l u d e s , f o r example, r e l i a b l y
o p e r a t i n g t h e s w i t c h i n g mechanism a t t h e predetermined
10 t i m i n g , a n d / o r o p e r a t i n g t h e switchingmechanism s u c h t h a t
t h e package holding s e c t i o n i s r e l i a b l y m o v e d away f r o m t h e
c o n t a c t r o l l e r by t h e predetermined d i s t a n c e .
An o b j e c t 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
winding d e v i c e capable of s t a b l y o p e r a t i n g t h e s w i t c h i n g
15 mechanism adapted t o move t h e package holding s e c t i o n away
from t h e c o n t a c t r o l l e r , and a yarn winding machine
i n c l u d i n g t h e same.
Awinding d e v i c e comprises a package holding s e c t i o n
adapted t o r o t a t a b l y h o l d a package around which a yarn is
20 wound; a s w i t c h i n g mechanism adapted t o move t h e package
holding s e c t i o n from a winding p o s i t i o n t o a receded
p o s i t i o n , t h e winding p o s i t i o n b e i n g a p o s i t i o n where t h e
package holding s e c t i o n is l o c a t e d when t h e yarn is wound
around t h e package, and t h e receded p o s i t i o n being a
25 p o s i t i o n l o c a t e d away from t h e winding p o s i t i o n ; and a
c o n t r o l s e c t i o n a d a p t e d t o o p e r a t e t h e switchingmechanism
a f t e r t h e switchingmechanismhasmovedthepackageholding
s e c t i o n f r o m t h e receded p o s i t i o n t o t h e winding p o s i t i o n .
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1is a f r o n t v i e w i l l u s t r a t i n g a spinningmachine
according to one embodiment;
FIG. 2 is a side view illustrating a spinning unit
included in the spinning machine of FIG. 1;
FIG. 3 is a block diagram illustrating main
5 configurations of the spinning machine;
FIG. 4 is a perspective view illustrating a winding
device included in the spinning machine of FIG. 1;
FIG. 5 is a side view illustrating a state of the
winding device at the time of winding;
10 FIG. 6 is a side view illustrating a state of the
winding device when adjusting an accumulation amount;
FIG. 7 is a side view illustrating a state of the
winding device at the time of yarn joining operation;
FIG. 8 is a side view illustrating a state of the
15 winding device that has not been returned to an original
position; and
FIG. 9 is a flow chart illustrating control
processing in a unit controller.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
One embodiment will be described with reference to
the accompanying drawings. In description ofthe drawings,
the same reference numerals are denoted for the same
elements, and redundant description will be omitted. The
25 dimensional ratio sin the drawings donotnecessarilymatch
with the description. In the present specification,
"upstreamrra nd "downstream" respectively indicate upstream
and downstream in a travelling direction of a spun yarn
(yarn) 10 at the time of spinning. 4
3 0 As illustrated in FIG. 1, a spinning machine (yarn
winding machine) 1 includes a plurality of spinning units
2, a yarn joining cart 3, a blower box 4, and a motor box
5. The plurality of spinning units 2 is arranged in a row,
and each of the spinning units 2 is adapted to produce the
spun yarn 10 and to wind the spun yarn 10 around a package
5 45. The yarn joining cart 3 is adapted to perform a yarn
joining operation in a spinning unit 2 where the spun yarn
10 has been disconnected. The blower box 4 accommodates
anairsupplysourceadaptedtogenerate suction flow and/or
whirling flow in each section of the spinning unit 2, and
10 the like. The motor box 5 accommodates a motor adapted to
supply power to each section of the spinning unit 2, and
the like.
As illustrated in FIGS. 1 and 2, each spinning unit
2 includes a draft device 7, a pneumatic spinning device
15 (yarn supplying device) 9, a yarn accumulating device 12,
and a winding device 13 as main components in this order
from upstream towards downstream. The draft device 7 is
provided in proximity to an upper end of a frame 6 of the
spinning machine 1. A fiber bundle 8 fed from the draft
20 device 7 is spun by the pneumatic spinning device 9. The
spun yarn 10 produced by the pneumatic spinning device 9
is wound by the winding device 13 via a yarn accumulating
roller 21, and thus the package 45 is formed. In the
followings, a bobbin 48 with yarn layers of the spun yarn
25 10 wound therearound is referred to as the package 45.
The draft device 7 is adapted to produce the fiber
bundle 8 by stretching a sliver 15. The draft device 7
includes four pairs of rollers, which are a pair of back
rollers 16, a pair of third rollers 17, a pair of middle
30 rollers 19 equipped with apron belts 18, and a pair of front
rollers 20. Bottom rollers of each pair of rollers 16, 17,
19, 20 are driven by power from the motor box 5 or power
of an electric motor (not illustrated) arranged in each
spinning unit 2. Each pair of rollers 16, 17, 19, and 20
is respectively driven at rotational speeds that are
5 different from one another. Accordingly, the sliver 15
supplied from upstream is stretched and formed into the
fiberbundle 8, andthe fiberbundle 8is fedtothepneumatic
spinning device 9 located downstream.
The pneumatic spinning device 9 is adapted to twist
10 the fiber bundle 8 by use of whirling airflow to produce
the spun yarn 10. Although detailed description and
drawings are omitted, the pneumatic spinning device 9
includes a fiber guiding section, a whirling airflow
generatingnozzle, andahollowguideshaftbody. The fiber
15 guiding section is adapted to guide the fiber bundle 8 fed
from the draft device 7 to a spinning chamber formed inside
the pneumatic spinning device 9. The whirling airflow
generating nozzle is arranged around a path of the fiber
bundle 8 and is adapted to generate the whirling airflow
20 inthespinningchamber. Withthewhirling airflow, a fiber
end of the fiber bundle 8 inside the spinning chamber is
inverted and whirled. The hollow guide shaft body is
adapted to guide the spun yarn 10 from the spinning chamber
to outside the pneumatic spinning device 9. The pneumatic
25 spinning device 9 is controlled to be driven/stopped by a
unit controller 30 (see FIG. 3).
The yarn accumulating device 12 is provided
downstream of the pneumatic spinning device 9. The yarn
accumulating device 12 includes the yarn accumulating
30 roller 21, a yarn hooking member 22, an upstream guide 23,
an electric motor 25, a downstream guide 26, and an
accumulation amount sensor 27.
The yarn hooking member 22 is adapted to guide the
spun yarn 10 to an outer peripheral surface of the yarn
accumulating roller 21 by rotating together with the yarn
5 a c c u m u l a t i n g r o l l e r 2 1 w i t h t h e spun yarn10 hookedthereon.
The yarn hooking member 22 is supported in a relatively
rotatable manner with respect to the yarn accumulating
roller 21.
The yarn accumulating roller 21 is adapted to
10 temporarily accumulate the spun yarn10 bywinding the spun
yarn 10 around the outer peripheral surface thereof. The
yarn accumulating roller 21 is rotationally driven at a
constant rotational speed by the electric motor 25
controlled by the unit controller 30. With this
15 configuration, the spun yarn 10 that has been guided to the
outer peripheral surface of the yarn accumulating roller
21 by the yarn hooking member 22 is tightly wound around
the yarn accumulating roller 21 by the rotation of the yarn
accumulating roller 21 and pulls a spun yarn 10 located
20 upstreamofthe yarn accumulatingdevice 12. Accordingly,
the spun yarn 10 can be continuously drawn from the
pneumatic spinning device 9.
The accumulation amount sensor 27 is adapted to
detect in a non-contacting manner, an accumulation amount
25 of the spun yarn 10 wound around the yarn accumulating
roller 21 and to transmit a detection signal to the unit
controller 30.
The upstream guide 23 is arranged slightly upstream
of the yarn accumulating roller 21. The upstream guide 23
30 is adapted to appropriately guide the spun yarn 10 to the
outer peripheral surface of the yarn accumulating roller
21. The upstream guide 23 prevents twists of the spun yarn
10 that propagate fromthe pneumatic spinning device 9 from
propagating to downstream of the upstream guide 23.
A yarn clearer 52 is provided on a front surface side
5 of the frame 6 of the spinning machine 1 (a side of a worker
passage) and between the pneumatic spinning device 9 and
the yarn accumulating device 12. The yarn clearer 52 is
adapted to monitor a thickness of the travelling spun yarn
10 and/or a presence and an absence of a foreign substance
10 in the spun yarn 10. The yarn clearer 52 transmits a yarn
defect detection signal to the unit controller 30 when
detecting a yarn defect of the spun yarn 10.
When receiving the yarn defect detection signal, the
unit controller 30 immediately stops injection of
15 compressed air fromthewhirlingairflowgeneratingnozzle
of the pneumatic spinning device 9. Accordingly, the
whirling airflow is stopped and thereby twisting the fiber
bundle 8 is stopped, and introduction of the fiber bundle
8 into the pneumatic spinning device 9 is also stopped.
20 Then, a continuous state of fibers is disconnected in the
pneumatic spinning device 9, and the spun yarn 10 is
disconnected. Subsequently, the unit controller 30
further stops the draft device 7 and the like.
The unit controller 30 transmits a control signal to
25 the yarn joining cart 3 to cause the yarn joining cart 3
to travel to the relevant spinning unit 2. Then, the unit
controller 30 drives the pneumatic spinning device 9 and
the like again, causes the yarn joining cart 3 to perform
the yarn joining operation, and restarts winding in the
30 relevantspinningunit2. At this time, afterthepneumatic
spinning device 9 has restarted spinning and before the
winding is restarted, the yarn accumulating device 12
eliminates slackening of the spun yarn 10 by accumulating
the spun yarn 10, which is continuously fed from the
pneumatic spinning machine 9, around the yarn accumulating
5 roller 21.
As illustrated in FIG. 2, the yarn joining cart 3
includes a splicer (a yarn joining device) 43, a suction
pipe 44, and a suction mouth 46. When a yarn breakage or
a yarn cut has occurred in a certain spinning unit 2, by
10 a control signal from the unit controller 30, the yarn
joining cart 3 drives wheels 42 and travels on a rail 41
(see FIG. 1) fixed to the frame 6 to such a spinning unit
2, and stops to perform the yarn joining operation.
The suctionpipe 44 is capableofverticallyswinging
15 with an axis as a center. The suction pipe 44 is adapted
to suck and catch a yarn end (an upper yarn) fed from the
pneumatic spinning device 9 and to guide the caught yarn
end to the splicer 43. The suction mouth 46 is capable of
vertically swinging with an axis as a center. The suction
20 mouth 46 is adapted to suck and catch a yarn end (a lower
yarn) from the package 45 supported by the winding device
13 and to guide the caught yarn end to the splicer 43.
Althoughdetaileddescription on the splicer 43is omitted,
the upper yarn and the lower yarn can be joined by twisting
25 the yarn ends together with the whirling airflow.
As illustrated in FIGS. 4 and 5, the winding device
13 includes a package holding section 71, a first switching
mechanism (switching mechanism) 60, a second switching
mechanism (switching mechanism) 80, a contact roller 91,
30 a traverse device 93, and the unit controller 30 (see FIG.
3) serving as a control section. The winding device 13
moves the package holding section 71 to a first position
and a second position by operating the first switching
mechanism 60 and the second switching mechanism 80. Each
of the first position and the second position is set in
5 advance.
In the following description, based on a vertical
relation of the package holding section 71 in a state
illustrated in FIGS. 4 and 5, wordings including concepts
of "upper" and "lower" may be used in description of
10 positional relation of each section. When using wordings
includingconcepts of "front" a n d " b a c k " i n t h e d e s c r i p t i o n
of the positional relation of each section, front side of
the spinning machine 1 (a left side of FIG. 5) is referred
to as "front" and back side of the spinning machine 1 (a
15 right side of FIG. 6) is referred to as "back". In side
views ofthepackageholding section 71illustratedinFIGS.
5 to 8, illustration of a sandwich arm 75a on the front side
in the drawings is omitted.
The contact roller 91 is adapted to rotate in contact
20 with an outer peripheral surface of the package 45. The
traverse device 93 includes a traverse guide 76 capable of
guiding the spun yarn 10. By driving the contact roller
91 with an electric motor (not illustrated) while
reciprocatingthetraverse guide 76 with a drive means (not
25 illustrated), the winding device 13 rotates the package 45
in contact with the contact roller 91 while traversing the
spun yarn 10, and winds the spun yarn 10 around the package
45.
As illustrated in FIGS. 4 and 5, the package holding
30 section 71 is adapted to rotatably hold the package 45 and
includes a fixed portion 73 fixed to the frame 6 and a
swinging portion 75 capable of swinging forward and
backward with r e s p e c t t o t h e f i x e d portion 73.
The f i x e d portion 73 is f i x e d t o the frame 6 located
below t h e contact r o l l e r 91. S p e c i f i c a l l y , t h e f i x e d
5 p o r t i o n 73 is screwed t o t h e frame 6 i n a screwed portion
73a provided i n t h e f i x e d p o r t i o n 73.
In a lower end of a lower f i x e d p o r t i o n 73b of t h e
f i x e d p o r t i o n 73, a p a i r of r o t a t i o n l i n k s 73d and 73d is
provided. The r o t a t i o n l i n k s 73d and 73d a r e coupled t o
10 each o t h e r with a r o t a t i o n s h a f t 73c t h a t passes through
i n a t h i c k n e s s d i r e c t i o n ( a d i r e c t i o n inwhich t h e spinning
u n i t s 2 a r e arranged) w i t h t h e lower f i x e d p o r t i o n 73b
therebetween. A lower end 60a of a case of t h e f i r s t
switching mechanism 60, which is t o be described l a t e r , is
15 c o u p l e d t o o n e r o t a t i o n l i n k 7 3 d a t a p r e d e t e r m i . n e d p o s i t i o n
located away from t h e r o t a t i o n s h a f t 73c i n a d i r e c t i o n of
r o t a t i o n diameter of t h e r o t a t i o n s h a f t 73c (a r o t a t i o n
diameter d i r e c t i o n ) . A t i p end 82a of a p i s t o n rod 82 of
a s i n g l e - a c t i n g c y l i n d e r 81 included i n t h e second
20 switching mechanism 80, which is t o be described l a t e r , is
c o u p l e d t o t h e o t h e r r o t a t i o n l i n k 7 3 d a t a p o s i t i o n l o c a t e d
away from t h e r o t a t i o n s h a f t 73c i n t h e r o t a t i o n diameter
d i r e c t i o n . An upper end 81a of a case of t h e s i n g l e - a c t i n g
c y l i n d e r 81 is coupled t o an upper end of t h e lower f i x e d
25 p o r t i o n 73b.
The swinging portion 75 is supported with r e s p e c t t o
t h e f i x e d p o r t i o n 73 and i s capable of swinging about a
support s h a f t (swinging s h a f t ) 70. The swinging portion
75 includes a main body p o r t i o n 75f and two sandwich arms
30 ( t h e sandwich arm 75a and t h e sandwich arm 75b).
The main body p o r t i o n 75f is swingably provided with
r e s p e c t t o t h e support s h a f t 70 f i x e d t o t h e f i x e d portion
73. In o t h e r words, t h e main body p o r t i o n 75f i s swingably
providedwith r e s p e c t t o t h e frame 6. A t i p end of a p i s t o n
rod 61 of t h e f i r s t switching mechanism 60, which is t o be
5 described l a t e r , is coupled t o a back end portion 75g of
the main body p o r t i o n 75f.
The sandwich arms 75a and 75b extend s u b s t a n t i a l l y
p a r a l l e l t o each o t h e r and hold t h e package 45 i n a
sandwiching manner. The sandwich arms 75a and 75b a r e
10 i n t e g r a l l y formedwiththemainbodyportion 75f. That is,
t h e sandwich arms 75a and 75b swing with r e s p e c t t o t h e
support s h a f t 70 t o g e t h e r with t h e main body p o r t i o n 75f.
Bobbin holders 75c and 75c a r e r e s p e c t i v e l y provided
onthesandwicharm75aandthesandwicharm75b." Thebobbin
15 holders 75c and 75c a r e r e s p e c t i v e l y provided a t p o s i t i o n s
t o face each o t h e r . One bobbin holder 75c is r o t a t a b l y
provided on t h e sandwich arm 75a via a bearing. The other
bobbin holder 7 5 c i s r o t a t a b l y p r o v i d e d on t h e sandwich arm
75b v i a a bearing. The package holding s e c t i o n 71 holds
20 t h e package 45 by sandwiching t h e package 45 with t h e two
bobbin holders 75c and 75c. The package 45 is r o t a t e d
t o g e t h e r with t h e two bobbin holders 75c and 75c with
r e s p e c t t o t h e swinging p o r t i o n 75 by d r i v e power of t h e
contact r o l l e r 91.
2 5 The sandwich arm 75a is supported by an
opening/closing s h a f t 75d and is swingably provided about
the opening/closing s h a f t 7 5 d so a s tomove c l o s e t o or away
from t h e sandwich arm 75b. The sandwich arm 75a i s urged
by a b u i l t - i n s p r i n g (not i l l u s t r a t e d ) i n a d i r e c t i o n of
30 moving c l o s e t o t h e sandwich arm 75b.
An o p e r a t i n g l e v e r 75e t h a t extends f u r t h e r upward
from a position of the bobbin holder 75c is mounted at an
upper end portion of the sandwich arm 75a. The operating
lever 75e is operated when the bobbin 48 or the package 45
is attached to or removed from the bobbin holders 75c and
5 75c.
The first switching mechanism 60 is adapted to
appropriately bring the package 45 into contact with the
contact roller 91. The first switching mechanism 60 is
formed as a double-acting air pressure cylinder, and as
10 illustrated in FIG. 4, includes the piston rod 61, a piston
62 fixed to the piston rod 61, a contact-pressure port 63,
a reverse-pressure port 64, and a lifter port 68 as main
components.
Air is supplied fromthe contact-pressure port 63 and
15 the reverse-pressure port 64 into the case of the first
switching mechanism 60. When there is a difference in air
pressure between air suppliedtothe contact-pressure port
63 and air supplied to the reverse-pressure port 64, the
air pushe st he piston 62 anddrivesthe piston rod 61. When
20 the piston rod 61 is pushed upward, the back end portion
75g of the main body portion 75f is lifted up, and the
swingingportion 75is swungto a front side ofthe spinning
unit 2 (a left direction of FIG. 5) with the support shaft
70 as a center. As a result, the package 45 is moved in
25 a direction in which the package 45 is located away from
the contact roller 91. On the other hand, when the piston
rod 61 is pushed downward, the back end portion 75g of the
main body portion 75f is pulled downward, and the package
holding section 71 is swung to a back side of the spinning
30 unit 2 (a right direction of FIG. 5) with the support shaft
70 as a center. As a result, the package 45 is pressed
against the contact roller 91. The contact-pressure port
63is connectedto a contact-pressure compressedair source
65 provided within the blower box 4. The reverse-pressure
port 64 is connectedtothe contact-pressure compressedair
5 source 65 via a depressurization valve 67.
The first switching mechanism 60 moves the package
holding section 71 from a winding position (a position of
the swinging portion 75 illustrated in FIG. 5), which is
a position of the package holding section 71 when the spun
10 y a r n 1 0 i s w o u n d a r o u n d t h e p a c k a g e 45,tothe first position
(a receded position: a position of the swinging portion 75
illustrated in FIG. 6), which is a position located away
from the winding position. In other words, the first
switchingmechanism60movesthepackage 45 fromthewinding
15 position to the first position.
Compressed air is supplied from the lifter port 68
into the case of the first switching mechanism 60. The
lifter port 68 is connectedto a first compressedair source
69. The lifter port 68 is provided separately from the
20 reverse-pressure port 64 to move the piston rod 61 slightly
upward. An electromagnetic valve (not illustrated) is
a r r a n g e d b e t w e e n t h e l i f t e r p o r t 6 8 andthe first compressed
air source 69, and the unit controller 30 controls whether
to supply compressed air to the lifter port 68.
2 5 When compressed air is supplied to the lifter port
68, as illustrated in FIG. 6, the piston rod 61 is pushed
slightly upward (by a distance L11 illustrated in FIG. 6),
and the back end portion 759 of the main body portion 75f
is slightly lifted up. The sandwich arms 75a and 75b are
30 slightly swung to the front side of the spinning unit 2 (a
left direction of FIG. 6) with the support shaft 70 as a
c e n t e r , and t h u s t h e package 45 is s l i g h t l y moved away (by
a d i s t a n c e L12 i l l u s t r a t e d i n FIG. 6) from t h e c o n t a c t
r o l l e r 91. Such a movement of t h e package holding s e c t i o n
71 ( t h e .package 45) is performed when making f i n e
5 adjustments t o a winding s p e e d o f t h e spun yarn 10 t o a d j u s t
t h e accumulation amount of t h e spun yarn 10 i n t h e yarn
accumulating d e v i c e 12. When t h e package holding s e c t i o n
71 is moved from t h e winding p o s i t i o n t o t h e f i r s t p o s i t i o n
by t h e f i r s t s w i t c h i n g mechanism 60, t h e spun yarn 10 is
10 maintained t o be engaged with t h e t r a v e r s e guide 76. That
is, whilebeingtraversedbythetraverse guide 76, t h e spun
yarn 10 is wound around t h e package 45.
The second s w i t c h i n g mechanism 80 is adapted t o move
t h e package holding s e c t i o n 71 from t h e winding p o s i t i o n
15 ( t h e p o s i t i o n o f t h e s w i n g i n g p o r t i o n 7 5 i l l u s t r a t e d i n F I G .
5) t o t h e second p o s i t i o n (a receded p o s i t i o n : a p o s i t i o n
of t h e swinging p o r t i o n 75 i l l u s t r a t e d i n FIG. 7 ) . The
second p o s i t i o n i s a p o s i t i o n l o c a t e d f u r t h e r away f r o m t h e
winding p o s i t i o n than t h e f i r s t p o s i t i o n ( t h e receded
20 p o s i t i o n : t h e p o s i t i o n of t h e swinging p o r t i o n 75
i l l u s t r a t e d i n FIG. 6 ) . In o t h e r words, t h e second
switchingmechanism80movesthepackage 45 fromthewinding
p o s i t i o n t o t h e second p o s i t i o n . As i l l u s t r a t e d i n FIGS.
2 and 4 , t h e second s w i t c h i n g mechanism 80 i n c l u d e s t h e
25 s i n g l e - a c t i n g c y l i n d e r 8 1 a d a p t e d t o move t h e package
holding s e c t i o n 71 from t h e winding p o s i t i o n t o t h e second
p o s i t i o n , and a s p r i n g (an e l a s t i c member) 84 adapted t o
m o v e t h e p a c k a g e h o l d i n g s e c t i o n 7 1 f r o m t h e s e c o n d p o s i t i o n
t o t h e winding p o s i t i o n . The s i n g l e - a c t i n g c y l i n d e r 81
30 i n c l u d e s t h e p i s t o n rod 82, a p i s t o n 83 f i x e d t o t h e p i s t o n
rod 82, and a p o r t 86 a s main components. An
electromagnetic valve (not illustrated) is arranged
between the port 86 and the second compressed air source
89, and the unit controller 30 controls whether to supply
compressed air to the port 86.
5 Compressed air is supplied from the port 86 into the
case ofthe single-acting cylinder 81. When the compressed
air is suppliedtotheport 86 and the piston rod 82 is drawn
into the case, as illustrated in F I G . 7, the rotation link
73d is rotated about the rotation shaft 73c (in a
10 counterclockwise direction of F I G . 7). With this rotation,
the lower end 60a of the case of the first switching
mechanism 60 is pushed upward by the rotation link 73d.
Accordingly, the entire first switching mechanism 60 is
pushedupwardwith a relativelygreat stroke (bya distance
15 L21 illustrated in F I G . 7) . As a result, the back end
portion 75g of the main body portion 75f is lifted with a
relatively great stroke. The sandwich arms 75a and 75b are
relatively greatly swung to the front side of the spinning
unit 2 (a left direction of F I G . 7) with the support shaft
20 70 as a center, and thus the package 45 is moved away from
the contact roller 91 relatively greatly (by a distance L22
illustrated in F I G . 7). The distance L22 is longer than
the distance L12.
Suchamovementofthepackageholding section 71 (the
25 package 45) by the second switching mechanism 80 is
performed immediately after a yarn breakage has occurred
and/or before a yarn joining operation is performed by the
splicer 43. When the package holding section 71 is moved
from the winding position to the second position by the
30 second switching mechanism 80, the spun yarn 10 is
disengaged from the traverse guide 76. That is, since the
spun yarn 10 is not traversed by the traverse guide 76, a
bunch-winding is formed on the package 45.
The unit controller 30 illustrated in FIG. 3 is a
portion inwhichvarious types of control processin gin the
5 winding device 13 are performed, and is formed of a Central
Processing Unit (CPU), a Read Only Memory (ROM), a Random
Access Memory (RAM), a hard disk, and the like. The various
types of control processing in the unit controller 30 are,
for example, formed as software in which a program stored
10 in the ROM is loaded onto the RAM and is performed in the
CPU. A portion in which the various types of control
processing are performed in the unit controller 30 may be
formed as hardware.
The unit controller 30 controls the first switching
15 mechanism 60 and the second switching mechanism 80 to move
the package holding section 71 (the package 45) to any one
ofthe winding position, the first position, and the second
position at a predetermined timing. In other words, the
unit controller 30 controls the first switching mechanism
20 60 or the second switching mechanism 80 to move the package
holding section 71 away from the winding position at the
predetermined timing. In the following description, a
control performed to move the package holding section 71
away from the winding position by operating the first
25 switching mechanism 60 or the second switching mechanism
80 will be referred to as a "move-away control". As
described later, the move-away control in the present
embodiment includes a " l i f t - u p c o n t r o 1 " t o m o v e t h e p a c k a g e
holding section 71 from the winding position to the first
30 position, and a "retreat control" to move the package
holding section 71 from the winding position to the second
p o s i t i o n .
When winding t h e spun yarn 10 around t h e package 45
by r o t a t i n g t h e package 45 i n c o n t a c t with t h e c o n t a c t
r o l l e r 91 while t r a v e r s i n g t h e spun yarn 10, t h e u n i t
5 c o n t r o l l e r 30 p o s i t i o n s t h e package holding s e c t i o n 71 a t
t h e winding p o s i t i o n .
When a d j u s t i n g t h e winding s p e e d o f t h e spun yarn 10
and t h e r e b y a d j u s t i n g t h e accumulation amount of t h e spun
yarn 10 i n t h e yarn accumulating device 12, t h e u n i t
10 c o n t r o l l e r 30 movesthe package holding s e c t i o n 7 1 f r o m t h e
winding p o s i t i o n t o t h e f i r s t p o s i t i o n by o p e r a t i n g t h e
f i r s t s w i t c h i n g mechanism 60 ( t h e l i f t - u p c o n t r o l ) .
I r n r n e d i a t e l y a f t e r a y a r n b r e a k a g e h a s o c c u r r e d a n d / o r
b e f o r e t h e s p l i c e r 43 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 ,
15 t h e u n i t c o n t r o l l e r 30 moves t h e package holding s e c t i o n
71 from t h e winding p o s i t i o n t o t h e second p o s i t i o n by
o p e r a t i n g t h e second s w i t c h i n g mechanism 80 ( t h e r e t r e a t
c o n t r o l ) .
In t h e winding d e v i c e 1 3 of t h e p r e s e n t embodiment,
20 a f t e r t h e second s w i t c h i n g mechanism 80 has moved t h e
package holding s e c t i o n 71 from t h e second p o s i t i o n t o t h e
w i n d i n g p o s i t i o n , t h e u n i t c o n t r o l l e r 30 r e t u r n s t h e second
switchingmechanism 80 t o an i n i t i a l s t a t e by o p e r a t i n g t h e
f i r s t switchingmechanism 60. The i n i t i a l s t a t e i n d i c a t e s
25 a s t a t e of t h e second s w i t c h i n g mechanism 80 b e f o r e t h e
second s w i t c h i n g mechanism 80 moves t h e package holding
s e c t i o n 7 1 f r o m t h e winding p o s i t i o n t o t h e s e c o n d p o s i t i o n
(a s t a t e of t h e second s w i t c h i n g mechanism 80 i l l u s t r a t e d
i n FIG. 5 ) . This c o n t r o l by t h e u n i t c o n t r o l l e r 30 w i l l
30 h e r e i n a f t e r be r e f e r r e d t o a s a "reset c o n t r o l " . The u n i t
c o n t r o l l e r 30 of t h e p r e s e n t embodiment o p e r a t e s t h e f i r s t
switching mechanism 60 and returns the first switching
mechanism 60 to an original position (a position of the
first switching mechanism 60 illustrated in F I G . 5) to
return the second switching mechanism 80 to the initial
5 state.
Specifically, as illustrated in F I G . 8, in a state
in which the spring 84 of the second switching mechanism
80 is contracted, in other words, in a state in which the
second switching mechanism 80 is not in the initial state,
10 the unit controller 30 operates the first switching
mechanism 60. At this time, since the rotation link 73d
is rotatable in a clockwise direction, the rotation link
73d is rotated in the clockwise direction by operation of
the first switching mechanism 60. By the rotation of the
15 rotationlink73d, the lower end 60aofthe caseofthe first
switching mechanism 60 is moved downward. That is, a
position of the first switching mechanism 60 is moved to
the original position (the position of the first switching
mechanism 60 illustrated in F I G . 5). Simultaneously with
20 this movement, the tip end 82a of the piston rod 82 in the
second switchingmechanism80 ismovedin a right direction
of F I G . 8, andthe s p r i n g 8 4 i s p u l l e d i n t h e r i g h t d i r e c t i o n .
Accordingly, the second switchingmechanism 80 is returned
to the initial state as illustrated in F I G . 5.
2 5 The reset control by the unit controller 30 described
above is performed before the first switchingmechanism 60
moves the package holding section 71tothe first position.
To describe in further details, the above-described reset
control is performed after the yarn joining operation is
30 performed by the splicer 43 and before a next adjustment
of the accumulation amount of the spun yarn 10 in the yarn
accumulating device 12 is performed. In other words, the
reset control is performed after the retreat control has
been performed and before a next lift-up control is
performed.
5 The reset control will be described with reference
to FIG. 9. In a case in which the yarn joining operation
is requiredtobeperformed, for example, when the spun yarn
10 is disconnected, theunit controller 30movesthepackage
holding section 71 to the second position by operating the
10 second switching mechanism 80 (step S1) . When confirming
that the package holding section 71 has moved to the second
p o s i t i o n , t h e u n i t c o n t r o l l e r 3 0 m o v e s t h e y a r n j o i n i n g c a r t
3 to a predetermined position and causes the splicer 43 to
perform the yarn joining operation (step S2).
15 Then, the unit controller 30 determines whether or
notapredeterminedperiodoftime (forexample, 30 seconds)
has elapsed after the yarn joining operation (may be after
performing the retreat control) (step S3). When
determining that the predetermined period of time has
20 elapsed (step S3: YES), the unit controller 30 performs the
reset control (step S4). The operation of the first
switching mechanism 60 in the reset control may be one time
or a pluralityoftimes. Furthermore, the operation ofthe
first switching mechanism 60 in the reset control may be
25 continuous or intermittent.
Subsequently, the unit controller 30 monitors a
detection signal transmitted fromthe accumulation amount
sensor 27 and determines whether or not the accumulation
amount of the spun yarn 10 in the yarn accumulating device
30 12 is a predetermined amount or less (step S5). When
determining that the accumulation amount of the spun yarn
10 in the yarn accumulating device 12 is the predetermined
amount or less (step S5: YES), the unit controller 30
performs the lift-up control (step S6).
Next, effects of the above-described winding device
5 1 3 and the spinning machine 1 including the same will be
described.
In the winding device 13 of the above-described
embodiment, after the second switching mechanism 80 has
moved the package holding section 71, the unit controller
10 30 returns the second switching mechanism 80 to the initial
state. Specifically, in the winding device 13 of the
above-described embodiment, after performing the retreat
control by the unit controller 30, the reset control is
always performed. Further specifically, after performing
15 the retreat control, the unit controller 30 performs the
reset control to operate the first switching mechanism 60
(to perform an ON/OFF control) regardless of the
accumulation amount of the spun yarn 10 in the yarn
accumulating device 12. In such a manner, the second
20 switching mechanism 80 is reliably returned to the initial
state. Consequently, the package holding section 71 can
be reliably moved (lifted up) from the winding position to
the first position atapredeterminedtiming. That is, the
first switchingmechanism 60 canbe stably operated and the
25 lift-upby the first switchingmechanism 60 canbe reliably
performed.
As illustrated in FIG. 5, the second switching
m e c h a n i s m 8 0 i n t h e w i n d i n g d e v i c e 1 3 o f t h e a b o v e - d e s c r i b e d
embodiment uses the spring 84 as a member for moving the
30 package holding section 71 from the second position to the
winding position. When the package holding section 71 is
moved fromthe winding position tothe second position, the
spring 84 is switched to a contracted state (see F I G . 7).
Byusingelastic forceofthe spring 84whichtriestoreturn
to an original state (see F I G . 5) from the contracted state
5 (see F I G . 7), the second switching mechanism 80 can return
the package holding section 71 from the second position to
the winding position.
However, as illustrated in F I G . 8, there may be a case
in which the spring 84 in the second switching mechanism
10 80 remains contracted even after the package holding
section 71 has been returned to the winding position, in
other words, there may be a case in which the second
switching mechanism 80 has not been completely returnedto
the initial state. When the lift-up control is performed
15 by the unit controller 30 under such a state, operation of
the first switching mechanism 60 may be absorbed by the
second switching mechanism 80. That is, since the lower
end 60a of the case of the first switching mechanism 60 is
in a movable state (the rotation link 73d is in a movable
20 state in the clockwise direction), even when the first
switching mechanism 60 is operated, the main body portion
75f ofthe swinging portion 75maynotbemovedbyan assumed
amount.
In the winding device 13 of the above-described
25 embodiment, the first switching mechanism 60 is returned
to the original position by operating the first switching
mechanism 60 by the unit controller 30, and thus the second
switching mechanism 80 is returned to the initial state.
That is, when operating the first switching mechanism 60
30 in a state in which the second switching mechanism 80 is
not in the initial state as illustrated in FIG. 8 (in the
s t a t e i n which t h e s p r i n g 84 i s c o n t r a c t e d ) , s i n c e t h e
r o t a t i o n l i n k 73d is i n t h e movable s t a t e i n t h e clockwise
d i r e c t i o n , t h e r o t a t i o n l i n k 7 3 d i s r o t a t e d i n t h e clockwise
d i r e c t i o n . With t h e r o t a t i o n o f t h e r o t a t i o n l i n k 73d, t h e
5 lower end 60a of t h e case of t h e f i r s t s w i t c h i n g mechanism
60 i s moved downward. In o t h e r words, t h e f i r s t s w i t c h i n g
m e c h a n i s m 6 0 i s m o v e d t o t h e o r i g i n a l p o s i t i o n ( t h e p o s i t i o n
o f t h e f i r s t switchingmechanism 60 i l l u s t r a t e d i n FIG. 5 ) .
Simultaneously with t h e movement, t h e t i p end 82a of t h e
10 p i s t o n rod 82 i n t h e second s w i t c h i n g mechanism 80 i s moved
i n t h e r i g h t d i r e c t i o n i l l u s t r a t e d i n FIG. 8, a n d t h e s p r i n g
84 is p u l l e d i n t h e r i g h t d i r e c t i o n . Accordingly, t h e
secondswitchingmechanism80 c a n b e r e t u r n e d t o t h e i n i t i a l
s t a t e a s i l l u s t r a t e d i n FIG. 5. Consequently, t h e package
15 holding s e c t i o n 7 1 c a n be r e l i a b l y moved ( l i f t e d up) from
t h e winding p o s i t i o n t o t h e f i r s t p o s i t i o n a t t h e
predetermined t i m i n g . That i s , t h e f i r s t switching
mechanism 60 can be s t a b l y o p e r a t e d .
One embodiment of t h e p r e s e n t i n v e n t i o n has been
20 d e s c r i b e d 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-described embodiment, a n d v a r i o u s changes may
bemade without d e p a r t i n g f r o m t h e scope o f t h i s i n v e n t i o n .
D e s c r i p t i o n has been made with an example t h a t i n t h e
winding device 13 of t h e above-described embodiment, a
25 s w i t c h i n g mechanism adapted t o move t h e package holding
s e c t i o n 7 1 f r o m t h e w i n d i n g p o s i t i o n t o t h e r e c e d e d p o s i t i o n
( t h e f i r s t p o s i t i o n and t h e second p o s i t i o n ) is formed of
t h e f i r s t s w i t c h i n g mechanism 60 and t h e second switching
mechanism 80, 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
30 s u c h a n example. For example, t h e s w i t c h i n g mechanism
adapted t o move the package holding s e c t i o n 7 1 from t h e
winding position to the receded position may be formed of
one or more than three switching mechanisms. Even in this
case, if a reset control to return all the switching
mechanisms to the initial state is performed by operating
5 at least one switching mechanism, the switching mechanism
adapted to move a package away from a contact roller can
be stably operated.
Description has beenmade with an example that in the
winding device 13 of the above-described embodiment, the
10 first switching mechanism 60 is configured as a
double-actingairpressure cylinder. However, the present
invention is not limited to such an example, and for example,
similar to the second switching mechanism 80 in the
above-described embodiment, a first switching mechanism
15 may include a single-acting cylinder adapted to move a
package holding section from the winding position to the
first position and a spring (an elastic member) adapted to
move the package holding section from the first position
to the winding position. Even with such a configuration,
20 by operating the single-acting cylinder of the first
switching mechanism, the first switching mechanism can be
returned to an initial state. Consequently, the package
holding section can be reliably moved (lifted up) from the
winding position to the first position at a predetermined
25 timing. That is, the first switching mechanism can be
stably operated, and the lift-up by the first switching
mechanism can be reliably performed.
Description has been made with an example in which
the unit controller 30 of the above-described embodiment
30 performs the reset control after an elapse of a
predetermined period of time after performing the retreat
control, but the present invention is not limited to such
an example. For example, the accumulation amount sensor
27 may detect that the accumulation amount of the spun yarn
10 in the yarn accumulating roller 21 has reached a
5 predetermined amount, which is different from the
accumulation amount to performthe lift-up control, and the
unit controller 30 may perform the reset control based on
a signal from the accumulation amount sensor 27.
In the spinning machine 1 and the spinning unit 2 in
10 the above-describedembodiment, the spun yarn10 is fed from
the pneumatic spinning device 9 by the yarn accumulating
roller 21 adapted to accumulate the spun yarn 10 by winding
a certain amount of the spun yarn 10 therearound. A spun
yarn may be fed from a pneumatic spinning device by a
15 delivery roller and a nip roller.
In the spinning machine 1 and the spinning unit 2 in
the above-described embodiment, the spun yarn 10 is
disconnectedby stopping whirling airflow ofthe pneumatic
spinning device 9 at the time of detecting a yarn defect.
20 However, a spun yarn may be disconnected by a cutter.
In the spinning machine 1 and the spinning unit 2 in
the above-described embodiment, a yarn path is arranged
such that the spun yarn 10 travels downward from the draft
device 7 locatedin anupperpart toward sthe winding device
25 13 located in a lower part. However, the yarn path may be
arranged such that a spun yarn travels from the lower part
towards the upper part.
In the spinning machine 1 and the spinning unit 2 in
the above-described embodiment, the traverse guide 76 of
30 the traverse device 93 is commonly driven among the
plurality of spinning units 2. Each section of a spinning
unit (for example, a draft device, a pneumatic spinning
device, a yarn winding device, etc. ) may be independently
driven in each spinning unit 2.
In the above-described embodiment, description has
5 been made with an example in which the unit controller 30
adapted to perform control of the entire spinning machine
1 performs various types of control processing in the
winding device 13. However, for example, a controller
dedicatedtothe various types of control processin gin the
10 winding device 13 may be provided in the winding device 13.
A winding device according to one aspect of the
present invention includes a package holding section
adapted to rotatably hold a package around which a yarn is
wound, a switching mechanism adapted to move the package
15 holding section fromawindingposition, whichisaposition
where the package holding section is located when the yarn
is wound around the package, to a receded position, which
is a position located away from the winding position, and
a control section adapted to operate the switching
20 mechanism after the switching mechanism has moved the
package holding section from the receded position to the
winding position.
In the winding device with the above configuration,
if the switching mechanism is not returned to an initial
25 state after the switching mechanism has moved the package
holding section from the receded position to the winding
position, a defect may occur during a next operation. That
is, the switching mechanism may not be reliably operated
at a predetermined timing or the switching mechanism may
30 not be operated to reliably recede the package holding
sectionby a predetermined amount. In the above-described
winding device, after the switchingmechanismhasmovedthe
package holding section, the control section returns the
switching mechanism to the initial state by operating the
switching mechanism. In such a manner, the switching
5 mechanism can be reliably operated at the predetermined
timing, and the package holding section can be reliably
moved to the receded position. Consequently, the
switching mechanism can be stably operated.
In one embodiment, the receded position may include
10 a first position and a second position that is located
further away from the winding position than the first
position. In this case, the switching mechanism may
include a first switching mechanism adapted to move the
package holding section from the winding position to the
15 first position and a second switching mechanism adapted to
move the first switching mechanism to move the package
holding section from the winding position to the second
position.
In the winding device with such a configuration,
20 after the second switching mechanism has moved the package
holding section to the second position, for some reasons,
the second switching mechanism may not be returned to the
initial state, which is a state of the second switching
mechanism before the package holding section is moved to
25 the second position. In this case, even if the first
switching mechanism is operated, the package holding
section cannot be moved to an assumed first position. The
reason is that a position ofthe first switchingmechanism,
which moves in conjunction with movement of the second
30 switchingmechanism, is displacedfromanoriginalposition.
In thewinding device ofthe above-describedone embodiment,
the control section returns the first switching mechanism
to the initial state by operating the first switching
mechanism. That is, by operating the first switching
mechanism, the position of the first switching mechanism
5 is returned to an original position. Furthermore, since
the second switching mechanism moves in conjunction with
themovement ofthe first switchingmechanism, by operating
the first switching mechanism, the second switching
mechanism can be returned to the initial state. In such
10 a manner, the position of the first switching mechanism can
be reliably returned to the original position. By
operating the first switchingmechanisminthis state, the
package holding section can be moved to the first position
that is assumed at the time of designing. Consequently,
15 the first switching mechanism can be reliably operated at
the predetermined timing, and the package holding section
can be reliably moved to the first position.
In one embodiment, the control sectionmay return the
second switching mechanism to the initial state before the
20 firstswitchingmechanismmovesthepackageholdingsection
from the winding position to the first position.
According to the winding device with the above
configuration, at a desired timing to move the package
holding section to the first position, the package holding
25 section can be reliably moved to the first position.
Inone embodiment, the secondswitchingmechanismmay
include a single-acting cylinder adapted to move the
package holding section from the winding position to the
second position and an elastic member adapted to move the
30 package holding section from the second position to the
winding position.
In t h e winding d e v i c e with such a c o n f i g u r a t i o n ,
a f t e r t h e s i n g l e - a c t i n g c y l i n d e r of t h e second s w i t c h i n g
mechanism has moved t h e package holding s e c t i o n t o t h e
second p o s i t i o n , f o r some reasons, t h e e l a s t i c member of
5 t h e second s w i t c h i n g mechanism may not be r e t u r n e d t o t h e
i n i t i a l s t a t e , which i s a s t a t e o f t h e e l a s t i c m e m b e r b e f o r e
thepackageholdingsectionismovedtothe s e c o n d p o s i t i o n .
In t h i s c a s e , even i f t h e f i r s t s w i t c h i n g mechanism is
o p e r a t e d , t h e package holding s e c t i o n cannot be moved t o
10 t h e assumed f i r s t p o s i t i o n . In t h e winding device of t h e
above-described one embodiment, t h e c o n t r o l s e c t i o n
r e t u r n s t h e f i r s t s w i t c h i n g m e c h a n i s m t o t h e i n i t i a l s t a t e
by o p e r a t i n g t h e f i r s t s w i t c h i n g mechanism. That is, by
o p e r a t i n g t h e f i r s t s w i t c h i n g mechanism, t h e p o s i t i o n of
15 t h e f i r s t s w i t c h i n g mechanism can be r e t u r n e d t o t h e
o r i g i n a l p o s i t i o n . Furthermore, s i n c e t h e second
s w i t c h i n g mechanismmoves i n c o n j u n c t i o n w i t h t h e movement
of t h e f i r s t s w i t c h i n g mechanism, by o p e r a t i n g t h e f i r s t
s w i t c h i n g mechanism, t h e e l a s t i c member of t h e second
20 s w i t c h i n g mechanism i s r e t u r n e d t o t h e i n i t i a l s t a t e . In
suchamanner, t h e p o s i t i o n o f t h e f i r s t s w i t c h i n g m e c h a n i s m
can be r e l i a b l y r e t u r n e d t o t h e o r i g i n a l p o s i t i o n . By
o p e r a t i n g t h e f i r s t s w i t c h i n g mechanism i n t h i s s t a t e , t h e
package holding s e c t i o n can be moved t o t h e assumed f i r s t
25 p o s i t i o n . Consequently, t h e f i r s t switchingmechanismcan
be r e l i a b l y o p e r a t e d a t t h e p r e d e t e r m i n e d t i m i n g , and t h e
package holding s e c t i o n can be r e l i a b l y moved t o t h e f i r s t
p o s i t i o n .
According t o t h e winding device with t h e above
30 c o n f i g u r a t i o n , t h e second s w i t c h i n g mechanism adapted t o
move t h e package holding s e c t i o n f r o m t h e winding p o s i t i o n
to the second position can be configured at a low cost.
In one embodiment, the winding device may further
include a contact roller adapted to rotate in contact with
the package when the package holding section is located at
5 the winding position.
In one embodiment, a yarn winding machine may include
the above-described winding device, a yarn accumulating
device arranged upstream ofthe winding device and adapted
toaccumulatethe yarn suppliedfromayarnsupplyingdevice,
10 and a yarn joining device adapted to perform a yarn joining
operationto jointhe yarn fromthe yarnaccumulatingdevice
and the yarn from the winding device. In this case, the
control sectionmaymove the package holding section tothe
first positionwhen a d j u s t i n g a n a c c u m u l a t i o n a m o u n t o f t h e
15 yarn in the yarn accumulating device, and may move the
package holding section to the second position when
performing the yarn joining operation by the yarn joining
device.
According to the yarn winding machine with the above
20 configuration, even when the accumulation amount of the
yarn in the yarn accumulating device decreases, by moving
the package holding section to the first position and
relatively reducing a speed in which the yarn is unwound
fromthe yarn accumulating device, the accumulation amount
25 of the yarn is increased. Furthermore, even when a yarn
breakage or the like occurs, by moving the package holding
section to the second position, a yarn end of the yarn is
prevented from being entangled with a member in proximity
to the package. In the yarn winding machine with such a
30 configuration, the control section moves the package
holding section from the winding position to the second
position forthe yarn joining operationby the yarn joining
device. Then, regardless ofthe accumulation amount ofthe
yarn in the yarn accumulating device, the control section
operates the first switchingmechanism (performs an ON/OFF
5 control) to return the second switching mechanism to the
initial state. In such a manner, when moving the package
holding section from the winding position to the first
position to adjust the accumulation amount of the yarn in
the yarn accumulating device, the second switching
10 mechanism is always in the initial state. Consequently,
since the package holding section can be reliably moved to
the first position at the predetermined timing, the
accumulation amount of the yarn can be reliably adjusted.
Furthermore, an occurrence of a defect such as damage, for
15 example, on a surface of the package caused by the package
holding section that has not moved an assumed distance can
be reduced.
In one embodiment, the control sectionmay return the
second switching mechanism to the initial state after the
20 yarn joining operation is performed by the yarn joining
device and before the accumulation amount of the yarn in
the yarn accumulating device is adjusted.
According to the yarn winding machine with the above
configuration, the accumulation amount of the yarn can be
25 reliably adjusted and the defect such as damage on the
surface of the package can be reduced.
In one embodiment, the control sectionmay return the
second switching mechanism to the initial state after an
elapse of a predetermined period of time after the yarn
30 joining operation is performed by the yarn joining device.
According to the yarn winding machine with the above
c o n f i g u r a t i o n , t h e f i r s t switchingmechanism can be s t a b l y
o p e r a t e d w i t h a s i m p l e s e t t i n g .
In one embodiment, t h e y a r n accumulating device may
i n c l u d e a y a r n accumulating r o l l e r adapted t o t e m p o r a r i l y
5 accumulate t h e yarn by r o t a t i n g while t h e yarn is being
wound around an o u t e r p e r i p h e r a l s u r f a c e t h e r e o f .
In one embodiment, t h e yarn winding machine may
f u r t h e r i n c l u d e a t r a v e r s e g u i d e p r o v i d e d i n d e p e n d e n t l y
from a c o n t a c t r o l l e r adapted t o r o t a t e i n c o n t a c t with t h e
10 package, a n d a d a p t e d t o t r a v e r s e t h e yarn t o b e woundaround
t h e p a c k a g e . I n t h i s c a s e , w h e n t h e p a c k a g e h o l d i n g s e c t i o n
is moved t o t h e f i r s t p o s i t i o n by t h e f i r s t s w i t c h i n g
mechanism, t h e yarn i s l o c a t e d a t a p o s i t i o n where t h e yarn
can be t r a v e r s e d by t h e t r a v e r s e g u i d e . When t h e package
15 holding s e c t i o n i s moved t o t h e second p o s i t i o n by t h e
second s w i t c h i n g mechanism, t h e yarn is l o c a t e d a t a
p o s i t i o n where t h e yarn cannotbetraversedbythetraverse
guide and a bunch-winding may be formed on t h e package.
According t o t h e yarn winding machine, even when an
20 amount o f t h e yarnwoundaroundthe y a r n a c c u m u l a t i n g r o l l e r
d e c r e a s e s , by moving t h e package holding s e c t i o n from t h e
winding p o s i t i o n t o t h e f i r s t p o s i t i o n , t h e yarn is wound
a t a speed f a s t e r t h a n a speed i n which t h e yarn is unwound
from t h e yarn accumulating r o l l e r , and thus t h e
25 accumulation amount of t h e yarn i n t h e yarn accumulating
r o l l e r can be i n c r e a s e d . Furthermore, even when t h e yarn
breakage o r t h e l i k e o c c u r s , s i n c e t h e bunch-winding is
formed on t h e package by moving t h e package holding s e c t i o n
from t h e winding p o s i t i o n t o t h e second p o s i t i o n , t h e yarn
30 end can be p r e v e n t e d from being e n t a n g l e d with t h e member
i n proximity t o t h e package.
WE CLAIM
1. A winding device comprising:
a package holding section adapted to rotatably hold
a package around which a yarn is wound;
5 a switching mechanism adapted to move the package
holding section from a winding position to a receded
position, the winding position being a position where the
package holding section is located when the yarn is wound
around the package, and the receded position being a
10 position located away from the winding position; and
a control section adapted to operate the switching
mechanism after the switching mechanism has moved the
package holding section from the receded position to the
winding position.
15
2. The winding device according to claim 1, wherein
the control section is adapted to operate the switching
mechanism to return the switching mechanism to an initial
state after the switching mechanism has moved the package
20 holding section from the receded position to the winding
position, the initial state being a state of the switching
mechanismbefore the package holding section is moved from
the winding position to the receded position.
2 5 3 . The winding device according to claim 1 or claim
2, wherein the receded position includes a first position
and a second position, the second position being located
further away from the winding position than the first
position, and
30 the switching mechanism includes:
a first switching mechanism adapted to move the
package holding s e c t i o n from t h e winding p o s i t i o n t o t h e
f i r s t p o s i t i o n ; and
a second s w i t c h i n g mechanism adapted t o move t h e
f i r s t s w i t c h i n g mechanism t o move t h e package holding
5 s e c t i o n from t h e winding p o s i t i o n t o t h e second p o s i t i o n .
4 . The winding device according t o claim 3, wherein
t h e c o n t r o l s e c t i o n i s adapted t o r e t u r n t h e second
s w i t c h i n g mechanism t o t h e i n i t i a l s t a t e b e f o r e t h e f i r s t
10 switchingmechanismmovesthe package holding s e c t i o n from
t h e winding p o s i t i o n t o t h e f i r s t p o s i t i o n .
5. The winding device according t o claim 4 , wherein
t h e second s w i t c h i n g mechanism i n c l u d e s :
15 a s i n g l e - a c t i n g c y l i n d e r a d a p t e d t o move t h e package
holding s e c t i o n from t h e winding p o s i t i o n t o t h e second
p o s i t i o n ; and
a n e l a s t i c m e m b e r a d a p t e d t o m o v e t h e p a c k a g e holding
s e c t i o n from t h e second p o s i t i o n t o t h e winding p o s i t i o n .
20
6. The winding d e v i c e a c c o r d i n g t o any one of claim
1 through claim 5, f u r t h e r comprising a c o n t a c t r o l l e r
adapted t o r o t a t e i n c o n t a c t with t h e package when t h e
p a c k a g e h o l d i n g sectionislocatedatthewindingposition.
7 . A yarn winding machine comprising:
t h e winding d e v i c e according t o any one of claim 1
through claim 6;
a yarn accumulating d e v i c e a r r a n g e d upstream of t h e
30 winding d e v i c e and adapted t o accumulate t h e yarn s u p p l i e d
from a y a r n s u p p l y i n g d e v i c e ; and
a yarn joining device adapted to perform a yarn
joining operation to join the yarn from the yarn
accumulating device and the yarn from the winding device,
wherein the control section is adapted to move the
5 package holding section to the first position when
adjusting an accumulation amount of the yarn in the yarn
accumulating device, and to move the package holding
section to the second position when performing the yarn
joining operation by the yarn joining device.
10
8. The yarn winding machine according to claim 7,
wherein the control section is adaptedto return the second
switching mechanism to the initial state after the yarn
joining operation is performed by the yarn joining device
15 and before the accumulation amount of the yarn in the yarn
accumulating device is adjusted.
9. The yarn winding machine according to claim 7 or
claim 8, wherein the control section is adapted to return
20 the second switching mechanism to the initial state after
an elapse of a predetermined period of time after the yarn
joining operation is performed by the yarn joining device.
10. The yarn winding machine according to any one
25 of claim 7 through claim 9, wherein the yarn accumulating
device includes a yarn accumulating roller adapted to
temporarily accumulate the yarn by rotating while the yarn
is being wound around an outer peripheral surface thereof.
11. The yarn winding machine according to any one
of claim 7 through claim 10, further comprising a traverse
g u i d e p r o v i d e d i n d e p e n d e n t l y from a c o n t a c t r o l l e r , and
a d a p t e d t o t r a v e r s e t h e yarn t o b e woundaroundthe package,
t h e c o n t a c t r o l l e r being adapted t o r o t a t e i n c o n t a c t with
t h e package,
5 wherein when t h e package holding s e c t i o n is moved t o
t h e f i r s t p o s i t i o n by t h e f i r s t s w i t c h i n g mechanism, t h e
y a r n i s l o c a t e d a t a p o s i t i o n w h e r e t h e y a r n c a n b e t r a v e r s e d
by t h e t r a v e r s e g u i d e , and
when t h e package holding s e c t i o n is moved t o t h e
10 s e c o n d p o s i t i o n b y t h e secondswitchingmechanism, t h e yarn
is located at a position where the yarn can not be traversed
by the traverse guide and a bunch-winding i s formed on the
package.