YARN WINDING MACHINE, AND TEXTILE MACHINE INCLUDING THE YARN WINDING
MACHINE
BACKGROUND OF THE INVENTION
5 1. Field of the Invention
The present invention relates to a yarn winding machine and a
textile machine including the yarn winding machine.
2. Description of the Related Art
10 Conventionally, as an art in this field, there has been known
a yarn withdrawal method of a winding package disclosed in Japanese
Unexamined Patent Application Publication No. 2-75674. In the yarn
withdrawalmethodofthewindingpackage, whena suctionmouthadapted
to sucka yarn end fromthe winding package is adjacent tothe package,
15 an initial driving to reversely rotate a winding drum at a low speed
is started and, after the rotation is performed a set number of times,
the winding drum is switched to a normal reverse rotation, which is
faster.
20 SUMMARY OF THE INVENTION
In a yarn winding machine, when the yarn end from the package
is sucked and caught, a double withdrawal in which a yarn on a surface
of the package is also sucked and caught may occur, which may cause
defects to the package.
2 5 An object of the present invention is to provide a yarn winding
machine capable of preventing defects in the package.
A yarn winding machine according to the present invention
includes a winding unit main body adaptedto forma package by winding
a yarn, a first catching and guiding device provided in the winding
30 unit main body and adapted to suck and catch the yarn from the package
and to guide the yarn, a control section adapted to control the first
catching and guiding device to perform a first catching operation
at a catching region to suck and catch the yarn from the package by
the first catching and guiding device, a separating operation to
35 separate the first catching and guiding device farther away from the
package than the catching region to withdraw the yarn, which has been
sucked and caught by the first catching and guiding device from a
surface of the package, a guiding operation to guide the yarn to a
target region by the first catching and guiding device, and a second
catching operation at the catching region to suck and catch the yarn
fromthepackageagainbythe firstcatchingandguidingdevicebetween
the separating operation and the guiding operation, and a setting
section adapted to set a control value relating to adjustment of the
second catching operation by the first catching and guiding device.
B R I E F D E S C R I P T I O N O F THE DRAWINGS
F I G . 1 is a schematic view of an automatic winder including a
winder unit according to one embodiment;
F I G . 2 is a schematic view and a block diagram illustrating a
structure of the winder unit;
F I G . 3 is an enlarged left-side view of a portion in proximity
to a traverse device of the winder unit;
F I G . 4 is an enlarged right-side view illustrating a portion
in proximity to a cradle of the winder unit;
F I G . 5 is a left-side view of the winder unit;
F I G . 6 is a left-side view of the winder unit;
F I G . 7 is a left-side view of the winder unit;
F I G . 8 is a left-side view illustrating a package moving to a
non-contact position or a contact position;
F I G . 9 is a diagram illustrating a relation between rotational
speeds of the package and movements of an upper-yarn catching member;
F I G . 10 is a diagram illustrating a relation between the
rotational speeds of the package and the movements of the upper-yarn
catching member according to an alternative embodiment;
F I G . 11 is a diagram illustrating a relation between the
rotational speeds of the package and the movements of the upper-yarn
catching member according to a still further alternative embodiment;
F I G . 12 is a diagram illustrating a relation between the
rotational speeds of the package and the movements of the upper-yarn
catching member according to a still further alternative embodiment;
@ F I G . 13 is a diagram illustrating a relation between the
rotational speeds of the package and the movements of the upper-yarn
catching member according to a still further alternative embodiment;
F I G . 14 is a block diagram illustrating a schematic structure
5 of the winder unit and a machine setting device;
F I G S . 15 are each a schematic operation diagram according to
the embodiment of F I G . 13;
F I G . 15A illustrates a first catching operation of the
upper-yarn catching member;
10 F I G . 15B illustrates a separating operation of the upper-yarn
catching member;
F I G . 15C illustrates a second catching operation of the
upper-yarn catching member;
F I G . 15D illustrates a standby operation of the upper-yarn
15 catching member; and
F I G . 15E illustrates a guiding operation of the upper-yarn
catching member.
e DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
A preferred embodiment of the present invention will be
hereinafter described in detail with reference to the attached
drawings. The same reference numerals are denoted on the same or
5 corresponding portions throughout the drawings, and redundant
description will be omitted.
An overall configuration of an automatic winder (textile
machine) 1 including a winder unit (yarn winding machine) 10 of the
present embodiment will be described with reference to FIG. 1.
10 "Upstream" and "downstream" in the present specification respectively
indicate upstream and downstream in a travelling direction of a yarn
20 at the time of yarn winding.
As illustrated in FIG. 1, the automatic winder 10 includes as
main components, a plurality of the winder units 10 arranged next
15 to each other, an automatic doffing device 80 and a machine setting
device 90.
Each of the winder units 10 is capable of forming a package 30
by winding the yarn 20 unwound from a yarn supplying bobbin 21 while
traversing the yarn 20.
20 When the package 30 is fully wound in each winder unit 10, the
automatic doffing device 80 travels to a position of the relevant
winder unit 10 and removes the fully-wound package 30 from the winder
unit 10. The automatic doffing device 80 may supply an empty bobbin
to the winder unit 10 after removing the package 30.
2 5 The machine setting device 90 includes as main components, a
setting section (inputting section) 91 and a display section 92. The
setting section 91 is capable of performing setting to each winder
unit 10 when an operator inputs a predetermined set value (control
value) or selects anappropriate controlmethod. The display section
30 92 is capable of displaying a winding status of the yarn 20 of each
winder unit 10, contents of an occurred trouble, or the like.
Next, a configurationofthe winder unit10 willbe specifically
described with reference to FIGS. 2 to 8. As illustrated in FIG. 2,
each winder unit 10 includes a winding unit main body 16 and a unit
35 control section (control section) 50.
The winding u n i t main body 16 includes a yarn unwinding
a s s i s t i n g device 12, a t e n s i o n applying device 13, a s p l i c e r device
(yarn j o i n i n g d e v i c e ) 1 4 a n d a c l e a r e r (yarndefectdetectingsection)
15 s e q u e n t i a l l y arranged from a s i d e of t h e yarn supplying bobbin
5 21 i n a yarn t r a v e l l i n g path between t h e yarn supplying bobbin 21
and a contact r o l l e r 29.
A yarn supplying s e c t i o n 11 adapted t o supply t h e yarn 20 t o
a winding bobbin 22 is provided i n a lower p a r t of t h e winding u n i t
main body 16 i n a d i r e c t i o n of machine h e i g h t . The yarn supplying
10 s e c t i o n 11 is capable o f holding a t a predetermined p o s i t i o n , t h e
yarn supplyingbobbin 21 t r a n s p o r t e d b y a bobbin t r a n s p o r t i n g system,
which is not i l l u s t r a t e d .
By lowering a r e g u l a t i n g member 40 adapted t o cover a core tube
of t h e yarn supplying bobbin 21 i n conjunction w i t h unwinding of t h e
15 yarn20 f r o m t h e y a r n s u p p l y i n g b o b b i n 2 1 , theyarnunwindingassisting
device 12 a s s i s t s t h e unwinding o f t h e yarn 20 fromthe yarn supplying
bobbin 21. The r e g u l a t i n g member 40 makes contact with a b a l l o o n of
t h e yarn 20, which is formed i n an upper p o r t i o n of t h e yarn supplying
bobbin 21 with swinging and c e n t r i f u g a l f o r c e of t h e yarn 20 unwound
20 from t h e yarn supplying bobbin 21, and c o n t r o l s t h e balloon t o an
a p p r o p r i a t e s i z e t o a s s i s t t h e unwinding of t h e yarn 20. A sensor
(not i l l u s t r a t e d ) adapted t o d e t e c t a chase s e c t i o n of t h e yarn
supplying bobbin 2 1 i s p r o v i d e d i n p r o x i m i t y t o t h e regulatingmember
40. When t h e sensor d e t e c t s lowering o f t h e chase s e c t i o n , t h e yarn
25 unwinding a s s i s t i n g device 12 can lower t h e r e g u l a t i n g member 40 with
an a i r c y l i n d e r (not i l l u s t r a t e d ) , e . g . , following t h e chase s e c t i o n .
The tension applying device 13 a p p l i e s a p r e d e t e r m i n e d t e n s i o n
on t h e t r a v e l l i n g yarn 20. The tension applying device 13 may be,
e . g . , a g a t e type i n w h i c h m o v a b l e c o m b t e e t h a r e a r r a n g e d w i t h r e s p e c t
30 t o f i x e d comb t e e t h . The movable comb t e e t h can be swung by a r o t a r y
solenoid such t h a t t h e movable comb t e e t h and t h e f i x e d comb t e e t h
can be engaged with each o t h e r o r r e l e a s e d from each o t h e r . The
tension applying device 13 may be, e . g . , a d i s c type o t h e r than t h e
above-described g a t e type.
35 The s p l i c e r device 1 4 j o i n s a l o w e r yarn fromthe yarn supplying
bobbin 21 and an upper yarn form t h e package 30 a t t h e time o f a yarn
cut performed by t h e c l e a r e r 15 upon d e t e c t i o n of a yarn d e f e c t , a t
t h e t i m e of a yarn breakage during unwinding of t h e yarn 20 from t h e
yarn supplying bobbin 21, o r t h e l i k e . As a yarn j o i n i n g device
adapted t o j o i n t h e upper yarn and t h e lower yarn i n such a manner,
a mechanical type, a type t h a t uses f l u i d such a s compressed a i r ,
or t h e l i k e may be employed.
The c l e a r e r 15 includes a c l e a r e r head 49 i n which a s e n s o r ( n o t
i l l u s t r a t e d ) adaptedtodetectathickness o f t h e yarn 20 is arranged,
and an analyzer 52 adapted t o process a yarn t h i c k n e s s s i g n a l from
t h e sensor. The c l e a r e r 15 d e t e c t s t h e yarn d e f e c t such a s a s l u b
by monitoring t h e yarn t h i c k n e s s s i g n a l from t h e sensor. A c u t t e r
39 is provided i n proximity t o t h e c l e a r e r head 49 t o immediately
cut t h e yarn 20 upon d e t e c t i o n of t h e yarn d e f e c t by t h e c l e a r e r 15.
The c l e a r e r 15 may d e t e c t a presence o r an absence of a foreign
substance included i n t h e yarn 20 a s a presence o r an absence of t h e
yarn d e f e c t .
Below and above t h e s p l i c e r device 1 4 , t h e r e a r e r e s p e c t i v e l y
provided a lower-yarn catching member (second catching and guiding
device) 25 adapted t o catch a yarn end from t h e yarn supplying bobbin
2 1 a n d t o g u i d e t h e y a r n e n d t o t h e s p l i c e r d e v i c e 1 4 , andanupper-yarn
catching member ( f i r s t catching and guiding device) 26 adapted t o
catch a yarn end from t h e package 30 and t o guide t h e yarn end t o
t h e s p l i c e r device 1 4 . The lower-yarn catching member 25 includes
a lower-yarn pipe arm 33 and a lower-yarn suction mouth 32 t h a t is
formed a t a t i p end of t h e lower-yarn pipe arm 33. The upper-yarn
catchingmember26includesanupper-yarnpipearm36andanupper-yarn
suction mouth ( s u c t i o n mouth) 35 t h a t is formed a t a t i p end of t h e
upper-yarn pipe arm 36.
The lower-yarn pipe arm 33 and t h e upper-yarn pipe arm 36 a r e
r e s p e c t i v e l y swingable with s h a f t s 34 and 37 a s a c e n t e r . An
a p p r o p r i a t e n e g a t i v e p r e s s u r e source is connected t o each of t h e
lower-yarnpipearm33 a n d t h e u p p e r - y a r n p i p e a r m 3 6 . In thismanner,
suction flow is generated i n t h e lower-yarn s u c t i o n mouth 32 and t h e
upper-yarn s u c t i o n mouth 35, and thereby t h e yarn ends of t h e upper
I member 25 by a motor 38. As t h e motor 38, v a r i o u s t y p e s of motors
such a s a servomotor, a s t e p motor, and an i n d u c t i o n motor may be
5 employed.
As i l l u s t r a t e d i n FIGS. 5 t o 7, t h e upper-yarn catching member
26 is arranged i n a movable manner such t h a t t h e upper-yarn suction
mouth 35 is located a t a catching region R1, a standby region R2 and
a yarn j o i n i n g region ( t a r g e t region) R3. The catching region R 1 is
10 located i n proximity t o t h e package 30 and is a region where t h e yarn
I
1 end 30a of t h e package 30 can be caught. The standby region R2 is
~ a region where t h e upper-yarn s u c t i o n mouth 35 is located f a r t h e r
I
away fromthepackage 3 0 t h a n t h e c a t c h i n g r e g i o n R l b y t h e upper-yarn
pipe arm 36 of t h e upper-yarn catching member 26 being swung i n a
I 15 d i r e c t i o n t o b e f a r t h e r away f r o m t h e p a c k a g e t h a n t h e catching region
R 1 . The yarn j o i n i n g region R3 is a region where t h e yarn end 30a,
which has been caught i n t h e c a t c h i n g r e g i o n R1, is guided t o t h e
s p l i c e r device 1 4 and is received and joined by t h e s p l i c e r device
1 4 . The standby region R2 and t h e yarn j o i n i n g region R3 a r e regions
20 where t h e upper-yarn catching member 26 is l o c a t e d when moving from
t h e catching region R1 t o t h e s p l i c e r device 1 4 .
As i l l u s t r a t e d i n FIG. 2, t h e w i n d i n g u n i t m a i n b o d y 1 6 i n c l u d e s
a c r a d l e 23 adapted t o support t h e winding bobbin 22 i n a removable
manner, and a contact r o l l e r 29 capable of r o t a t i n g i n contact with
25 a p e r i p h e r a l s u r f a c e of t h e winding bobbin 22 o r a p e r i p h e r a l s u r f a c e
o f t h e p a c k a g e 30. T h e w i n d i n g u n i t m a i n b o d y 1 6 i n c l u d e s i n p r o x i m i t y
t o t h e c r a d l e 23, an arm-type t r a v e r s e device 70 adapted t o t r a v e r s e
t h e yarn 20, and is capable of winding t h e yarn 20 around t h e package
30 while t r a v e r s i n g t h e yarn 20 with t h e t r a v e r s e device 70.
30 A guide p l a t e 28 is provided s l i g h t l y upstream of a t r a v e r s e
p o r t i o n and is adapted t o guide t h e upstream yarn 20 t o t h e t r a v e r s e
p o r t i o n . A c e r a m i c s t r a v e r s e fulcrum27 is arranged f a r t h e r upstream
I of t h e guide p l a t e 28. The t r a v e r s e device 70 t r a v e r s e s t h e yarn 20
I i n a winding width d i r e c t i o n of t h e package 30 (a d i r e c t i o n i n d i c a t e d
35 by an arrow i n FIG. 2) with t h e t r a v e r s e fulcrum 27 a s a fulcrum.
The c r a d l e 23 is capable of swinging with a swinging s h a f t 48
as a c e n t e r . An i n c r e a s e i n a yarn l a y e r diameter of t h e package 30
a s s o c i a t e d with winding of t h e yarn 20 around t h e winding bobbin 22
can be absorbed with swinging of t h e c r a d l e 23.
A package d r i v i n g motor 4 1 formed of a servomotor, e . g . , is
mounted t o t h e c r a d l e 23. The winder u n i t 10 winds t h e yarn 20 by
r o t a t i o n a l l y d r i v i n g t h e winding bobbin 22 with t h e package d r i v i n g
motor 4 1 . The package d r i v i n g motor 4 1 is capable of r o t a t i o n a l l y
d r i v i n g t h e winding bobbin 22 ( t h e package 30) i n a winding d i r e c t i o n
a s w e l l a s i n an unwinding d i r e c t i o n A.
When thewindingbobbin22 is s u p p o r t e d b y t h e c r a d l e 2 3 , amotor
s h a f t of t h e package d r i v i n g motor 4 1 is coupled t o t h e r e l e v a n t
winding bobbin 22 so a s not t o r e l a t i v e l y r o t a t e with r e s p e c t t o t h e
winding bobbin 22 (a so-called d i r e c t d r i v e system). Operation of
thepackagedrivingmotor41is controlledbyapackagedrivingcontrol
s e c t i o n ( c o n t r o l s e c t i o n ) 42. The package d r i v i n g c o n t r o l s e c t i o n
42 controlsthepackagedrivingmotor 4 1 t o o p e r a t e o r s t o p i n r e s p o n s e
t o a d r i v e s i g n a l from a u n i t c o n t r o l s e c t i o n 50. As t h e package
d r i v i n g motor 4 1 , v a r i o u s t y p e s of motors such a s a s t e p motor or
an induction motor may be employed without being l i m i t e d t o t h e
servomotor.
An a n g l e s e n s o r (diameter a c q u i r i n g s e c t i o n ) 44 adapted t o
d e t e c t an angle of t h e c r a d l e 23 is mounted t o t h e swinging s h a f t
48. The a n g l e s e n s o r 44 is formed of a r o t a r y encoder, e . g . , and
t r a n s m i t s a n a n g l e s i g n a l , whichcorrespondstotheangleofthecradle
23, t o t h e u n i t c o n t r o l s e c t i o n 50. Since t h e angle of t h e c r a d l e
23 changes a s a wound diameter of t h e package 30 i n c r e a s e s , t h e
diameter of t h e package 30 can be detected by d e t e c t i n g a swing angle
of t h e c r a d l e 23 with t h e a n g l e s e n s o r 4 4 . Any a p p r o p r i a t e
c o n f i g u r a t i o n may be employed t o d e t e c t t h e diameter of t h e package
30 o t h e r than t h e a n g l e s e n s o r 4 4 . For example, a c o n f i g u r a t i o n t h a t
uses a Hall I C , an a b s o l u t e t y p e encoder, o r t h e l i k e may be employed
t o d e t e c t t h e diameter of t h e package 30.
Next, a l a y o u t of a c o n f i g u r a t i o n of t h e t r a v e r s e device 70 and
a c o n f i g u r a t i o n i n proximity t o t h e t r a v e r s e device 70 w i l l be
describedwith reference to F I G . 3. In the present embodiment, since
the contact roller 29 is arranged such that anaxial direction thereof
corresponds to a lateral direction of the winding unit main body 16,
a side view such as F I G . 3, e-g., can be a view in the axial direction
of the contact roller 29. In F I G . 3, rotation of the package 30 in
the winding direction is clockwise and rotation of the package 30
in the unwinding direction is counterclockwise.
As illustrated in F I G . 3, the traverse device 70 includes a
traverse driving motor 76, an output shaft 77 and a traverse arm
(traverse guide) 74.
The traverse driving motor 76 is adapted to drive the traverse
arm 74 and is formed of a servomotor or the like. As illustrated in
F I G . 2, operation of the traverse driving motor 76 is controlled by
a traverse control section 78. The traverse driving motor 76 may be
another motor such as a step motor or a voice coil motor.
T h e t r a v e r s e c o n t r o l s e c t i o n 7 8 i s formedofhardwaresuch
as a dedicated microprocessor or the like, and is adapted to control
the traverse driving motor 76 to operate or stop in response to a
signal from the unit control section 50.
Power of the traverse driving motor 76 is transmitted to a
base-end portion of the traverse arm 74 via the output shaft 77
illustrated in F I G . 3. Since a rotor of the traverse driving motor
76 forwardly and reversely rotates, the traverse arm 74 swings into
and/or out of the page of F I G . 3 (in a left-right direction (traverse
direction) in F I G . 2). The traverse arm 74 illustrated in F I G . 3
indicates a position at a traverse end portion.
A hook-shaped yarn guiding section 73 is formed at a tip-end
portion of the traverse arm 74. The yarn guiding section 73 can hold
and guide the yarn 20. The yarn guiding section 73 reciprocates in
a state of holding the yarn 20, thereby allowing traverse of the yarn
20.
Next, a configuration of the cradle 23 will be described in
further detail with reference to F I G . 4. As illustrated in F I G . 4,
the winding unit main body 16 includes a swinging plate 17 adapted
to be capable of swinging with the swinging shaft 48 as a center.
Thecradle23 swingswiththe swinging shaft48 as acenterinaunified
manner with the swinging plate 17. A spring 18 formed as a tension
spring for gradually decreasing contact pressure and an air cylinder
60 are both connected to the swinging plate 17. A predetermined
swinging torque can be applied to the cradle 23 by the spring 18 and
the air cylinder 60.
The air cylinder 60 is formed as a double-acting cylinder
including a piston 601 in an interior thereof. In FIG. 4, compressed
air of air pressure P1 and compressed air of air pressure P2 are
respectively supplied to a cylinder chamber in a right side and a
cylinder chamber in a left side of a drawing of the piston 601.
An electro-pneumatic regulator 61 is connected to a pipe that
suppliesthe compressedair ofthe air pressure P2 tothe air cylinder
60. The electro-pneumatic regulator 61 is capable of adjusting the
air pressure P2 steplessly. The electro-pneumatic regulator 61
controls the air pressure P2 based on a control signal input from
the unit control section 50.
In a configuration illustrated in FIG. 4, since force of the
air cylinder 60 to pull the cradle 23 increases when the air pressure
P2 is decreased, torque that causes the cradle 23 to swing to a front
side of the winding unit main body 16 with the swinging shaft 48 as
a center increases. Since the contact roller 29 is arranged closer
to the front side of the winding unit main body 16 than the swinging
shaft 48, contact pressure between the package 30 and the contact
roller 29 can be increased with the decrease of the air pressure P2.
On the contrary, since the force of the air cylinder 60 to pull the
cradle 23 decreases when the air pressure P2 is increased, torque
that causes the cradle 23 to swing to a rear side of the winding unit
main body 16 with the swinging shaft 48 as a center increases.
Consequently, the contact pressure between the package 30 and the
contact roller 29 can be weakened. By further increasing the air
pressure P2, the package 30 can even be located away from a surface
of the contact roller 29.
The air cylinder 60 can swing the cradle 23 and thereby move
thepackage 30. In this case, thepackage 30 canbemovedtoaposition
where the package 30 is located away from the contact roller 29 (a
position where the package is not in contact with the contact roller
29) and a position where the package is in contact with the contact
roller 29.
5 The unit control section 50 includes, e.g., a CPU, a RAM, a ROM,
an 1/0 port and a communication port. A program to control each
component of the winding unit main body 16 is recorded in the ROM.
Each section, which is provided in the winding unit main body 16,
and the machine setting device 90 are connected to the 1/0 port and
10 the communication port, which enables communication of control
information or the like. Consequently, the unit control section 50
can control operations of each section provided in the winding unit
main body 16.
The unit control section 50 transmits a drive signal to the
15 package driving control section 42 to control rotational driving (a
rotational speed) of the package driving motor 41. The unit control
section 50 controls movements of the lower-yarn catching member 25
and the upper-yarn catching member 26 (swings of the lower-yarn pipe
arm33andtheupper-yarnpipearm36). Specifically, theunit control
20 section 50 controls the motor 38 of the upper-yarn catching member
26 to perform a catching operation at the catching region R1 to suck
and catch the yarn 20, a standby operation to be under standby at
the standby region R2 and a guiding operation to guide the yarn 20
to the yarn joining region R3.
25 The unit control section 50 adjusts the standby operation of
the upper-yarn catching member 26 at the standby region R2 according
tothe package diameter ofthe package 30 detectedbythe angle sensor
44, a length of a yarn defect in the yarn 20 detected by the clearer
15 anda rotationalspeedofthepackage 30. The unit control section
30 50 adjusts atleastoneofa stoppedpositionoftheupper-yarn suction
mouth 35 at the standby region R2, a period of time the upper-yarn
suction mouth 35 is stopped at the standby region R2, a speed at which
the upper-yarn catching member 26 moves from the catching region R1
tothe standby regionR2, and acceleration ofthe upper-yarn catching
35 member 26 moving from the catching region R1 to the standby region
R2.
Specifically, the unit control section 50 sets, e. g., a period
of standby time (stopping time) of the upper-yarn catching member
26 at the standby region R2 based on the length of the yarn defect
in the yarn 20 detected by the clearer 15. The unit control section
50 sets both of a separation distance between the package 30 and the
catching region R 1 and a separation distance between the package 30
and the stopped position of the upper-yarn suction mouth 35 at the
standby region R2 to be large according to an increase in the diameter
of the package 30 detected by the angle sensor 44. That is, the unit
control section 50 controls the upper-yarn catching member 26 such
that the upper-yarn suction mouth 35 is farther away from the package
30 as the diameter of the package 30 becomes large. The unit control
section 50 sets the stopped position of the upper-yarn suction mouth
35 at the standby region R2 according to the rotational speed (a yarn
guiding speed) of the package 30.
The setting section 91 of the machine setting device 90
illustrated in FIG. 1 sets a number of rotations, which is a number
of times the package 30 is rotated at a yarn-end catching speed (to
be described later in detail) in the unwinding direction A when
continuation of the yarn 20 is disconnected (hereinafter referred
to as a "yarn disconnection and the like") by a yarn cut performed
by the clearer 15 upon detection of the yarn defect, a yarn breakage
during unwinding of the yarn 20 from the yarn supplying bobbin 21,
or the like. The setting section 91 sets the number of rotations of
the package 30 based on, e.g., the diameter of the package 30 detected
by the angle sensor 44, or the like. In a case, e.g., where the
diameter of the package 30 is small, the setting section 91 sets the
number of rotations large since the yarn end 30a is unlikely to come
off the surface of the package 30. In a case where the diameter of
the package 30 is large, the setting section 91 sets the number of
rotations small since the y a r n e n d 3 0 a i s l i k e l y t o c o m e o f f t h e surface
of the package 30. The setting section 91 transmits the set number
of rotations of the package 30 to the unit control section 50.
The setting section 91 may set the number of rotations of the
package 30 in the unwinding direction A at the time of yarn
disconnection based on information that has been set and input in
advance. In other words, the setting section 91 sets the number of
rotations ofthepackage 3 0 b a s e d o n i n f o r m a t i o n i n p u t fromthe setting
section 91 with a key operation and the like by an operator. In such
a configuration, the operator can set the number of rotations of the
package 30 to a desired number.
In the above-described winder unit 10, when the yarn
disconnection and the like occurs, the lower yarn and the upper yarn
are required to be joined by the splicer device 14. Thus, the lower
yarn from the yarn supplying bobbin 21 is required to be caught by
the lower-yarn suction mouth 32 and the upper yarn from the package
30 is required to be caught and withdrawn by the upper-yarn suction
mouth 35. Control of a withdrawal operation of the upper yarn and
a yarn withdrawal method both performed in the winder unit 10 will
be described in detail with reference to FIGS. 2 to 9.
As illustrated in FIG. 3, the surface of the package 30 is in
contact with the contact roller 29 during winding operation before
the yarn disconnection and the like occurs. As just described, a
position of the package 30 where the package 30 is in contact with
the contact roller 29 is hereinafter referred to as a "contact
position" and is indicated by a reference symbol "Q2" in FIGS. 4 and
8.
Immediately after the yarn disconnection and the like occurs
during the winding operation, the unit control section 50 transmits
a drive signal to the electro-pneumatic regulator 61. Since the
electro-pneumatic regulator 61 is driven based on the drive signal,
the air pressure P2 of the air cylinder 60 is changed, thereby, as
illustrated in FIGS. 5 and 8, causing the cradle 23 to be driven in
a direction to be located away from the contact roller 29. The unit
control section 50 transmits a drive signal to the traverse control
section 78 to drive the traverse driving motor 76 and causes the
traverse arm 74 to be under standby at a position located at one end
in the traverse direction.
The package 30 is moved away from the contact roller 29 and is
0 heldatapredeterminedpositionwherethepackage 3 0 i s not i n contact
with t h e contact r o l l e r 29. The p o s i t i o n of t h e moved package 30 a t
t h i s time is h e r e i n a f t e r r e f e r r e d t o a s a "non-contact p o s i t i o n " and
is i n d i c a t e d by a r e f e r e n c e symbol "Ql" i n FIG. 8. Simultaneously,
5 t h e u n i t c o n t r o l s e c t i o n 50 t r a n s m i t s a d r i v e s i g n a l t o t h e package
d r i v i n g c o n t r o l s e c t i o n 42 t o d e c e l e r a t e and s t o p t h e r o t a t i o n of
t h e package 30 and then t o s t a r t r o t a t i n g t h e package 30 i n t h e
unwinding d i r e c t i o n ( a d i r e c t i o n i n d i c a t e d by an arrow A ) . A t t h i s
t i m e , as i l l u s t r a t e d i n FIG. 9, t h e u n i t c o n t r o l s e c t i o n 50
10 r o t a t i o n a l l y d r i v e s t h e package d r i v i n g motor 4 1 a t t h e yarn-end
catching speed (a f i r s t speed).
The u n i t c o n t r o l s e c t i o n 50 s e t s t h e yarn-end catching speed,
e. g., a s follows. In t h e case where t h e diameter of t h e package 30
is small, s i n c e t h e yarn end 30a is u n l i k e l y t o come off t h e s u r f a c e
15 of t h e package 30, t h e u n i t c o n t r o l s e c t i o n 50 sets t h e yarn-end
catching speed so a s t o slowly r o t a t e t h e package 30. I n t h e case
where t h e diameter o f t h e package 30 is l a r g e , s i n c e t h e yarn end
30a is l i k e l y t o come o f f t h e s u r f a c e of t h e package 30, t h e u n i t
c o n t r o l s e c t i o n 50 sets t h e yarn-end catching speed f a s t e r i n
20 comparisonwiththecasewherethediameterofthepackage 3 0 i s small.
Furthermore, t h e u n i t c o n t r o l s e c t i o n 50 swings t h e upper-yarn
pipe arm 36 by t r a n s m i t t i n g a d r i v e s i g n a l t o t h e upper-yarn catching
member 26 and, as i l l u s t r a t e d i n FIGS. 5 and 9, moves t h e upper-yarn
suction mouth 35 t o a p o s i t i o n a t t h e catching region R 1 i n proximity
25 t o t h e s u r f a c e o f t h e p a c k a g e 3 0 . Then, underastatewherethepackage
30 a t t h e non-contact p o s i t i o n Q1 is being r o t a t e d a t t h e yarn-end
catching speed i n t h e unwinding d i r e c t i o n A, t h e upper-yarn suction
mouth 35 performs t h e c a t c h i n g o p e r a t i o n . With t h e above-described
c a t c h i n g o p e r a t i o n , t h e yarn end 30a of t h e upper yarn connected t o
30 t h e package 30 can be sucked and caught by t h e upper-yarn suction
mouth 35.
When t h e package 30 is r o t a t e d a t t h e yarn-end catching speed
t h e number of times set by t h e s e t t i n g s e c t i o n 91 and t h e yarn end
30a is sucked and caught by t h e upper-yarn s u c t i o n mouth 35 i n t h e
35 above-described catching operation, t h e u n i t c o n t r o l s e c t i o n 50
d r i v e s t h e c r a d l e 23 i n a d i r e c t i o n t o be c l o s e r t o t h e contact r o l l e r
29. Consequently, t h e package 30 r e t u r n s t o t h e contact p o s i t i o n Q2
where t h e package 30 is i n contact with t h e contact r o l l e r 29. A t
t h i s time, s i n c e t h e r o t a t i o n of t h e package 30 i n t h e unwinding
5 d i r e c t i o n A is continued, t h e package 30 is r o t a t e d i n t h e unwinding
d i r e c t i o n A while being i n contact with t h e contact r o l l e r 29, and
thereby t h e contact r o l l e r 29 r o t a t e s with t h e package 30.
When t h e yarn end 30a of t h e package 30 is sucked and caught
by t h e upper-yarn suction mouth 35, t h e u n i t c o n t r o l s e c t i o n 50
10 c o n t r o l s t h e upper-yarn catching member 26 t o swing t h e upper-yarn
pipe arm 36 and, a s i l l u s t r a t e d i n FIGS. 6 and 9, moves t h e upper-yarn
suction mouth 35 t o a p o s i t i o n a t t h e standby region R2 where t h e
upper-yarn suction mouth 35 is located away from t h e package 30 and
then s t o p s t h e u p p e r - y a r n suctionmouth 35. Simultaneously, t h e u n i t
15 c o n t r o l s e c t i o n 50 t r a n s m i t s a d r i v e s i g n a l t o t h e package driving
c o n t r o l s e c t i o n 42 and, a s i l l u s t r a t e d i n FIG. 9, r o t a t i o n a l l y d r i v e s
t h e package 30 a t t h e yarn guiding speed, which is f a s t e r than t h e
yarn-end catching speed, i n t h e unwinding d i r e c t i o n A. With t h e
above-described c a t c h i n g o p e r a t i o n , t h e upper yarn o f t h e package
20 30 is f u r t h e r sucked and caught by t h e upper-yarn s u c t i o n mouth 35.
Subsequently, t h e u n i t c o n t r o l s e c t i o n 50 c o n t r o l s t h e
upper-yarn catching member 26 t o swing t h e upper-yarn pipe arm 36
and, a s i l l u s t r a t e d i n FIGS. 7 and 9, moves t h e upper-yarn suction
mouth 35 t o t h e yarn j o i n i n g region R3. Simultaneously, t h e u n i t
25 c o n t r o l s e c t i o n 50 t r a n s m i t s a d r i v e s i g n a l t o t h e package d r i v i n g
c o n t r o l s e c t i o n 42 t o d e c e l e r a t e and s t o p t h e r o t a t i o n of t h e package
30. Consequently, t h e package 30 s t o p s t o be r o t a t i o n a l l y driven.
As described above, t h e yarn end 30a of t h e package 30 is caught by
theupper-yarnsuctionmouth35 a n d t h e y a r n 2 0 i s g u i d e d t o t h e s p l i c e r
30 device 1 4 .
When t h e yarn end 30a of t h e package 30 is guided t o t h e s p l i c e r
device 1 4 , t h e guided yarn end 30a is almost simultaneously guided
t o t h e c l e a r e r 15 a s w e l l . Since t h e c l e a r e r 15 is arranged along
a p a t h i n w h i c h t h e y a r n 2 0 t r a v e l s a t t h e t i m e o f y a r n w i n d i n g o p e r a t i o n ,
35 when t h e upper yarn is guided t o t h e s p l i c e r device 1 4 , which is a l s o
arranged along the yarn travelling path, by the upper-yarn catching
member 26, the upper yarn is simultaneously guided to the clearer
15. The clearer 15 is thus used as a yarn detecting device adapted
to determine whether or not the yarn from the package 30 has been
guided to the splicer device 14 by the upper-yarn catching member
26. More specifically, in a case where the clearer 15 can detect the
upper yarn that has been guided after a completion of the guiding
operation, a determination can be made that the yarn end 30a of the
package 30 has been successfully guided to the splicer device 14.
On the contrary, in a case where the clearer 15 cannot detect the
upper yarn that has been guided after the completion of the guiding
operation, a determination can be made that guiding of the yarn end
30a ofthe package 30tothe splicer device14 has failed. The guiding
failure may be a failure in the catching operation, a failure in the
guiding operation, or the like. In the case where the determination
is made that the guiding has failed, the unit control section 50
controls the upper-yarn catching member 26 to perform the catching
operation, the standby operation and the guiding operation again,
and causes the yarn end 30a of the package 30 to be guided to the
splicer device 14.
As described above, in the winder unit 10 of the present
embodiment, the unit control section 50 controls the upper-yarn
catching member 26 to perform the catching operation at the catching
region R1 to suck and catch the yarn end 30a of the package 30, and
then to perform the standby operation to stop and be under standby
at the standby region R2 where the upper-yarn catching member 26 is
farther away from the package 30 than the catching region R1. The
standby operation of the upper-yarn catching member 26 is adjusted
according to the diameter of the package 30, the length of the yarn
defect include dinthe yarn 20 and the rotationalspeedofthe package
30. Accordingly, this allows prevention of a double withdrawal in
the winder unit 10 in which a yarn 20 on the surface of the package
30 is also sucked and caught when the yarn end 30a is sucked from
the package 30. In addition, the yarn end 30a of the package 30 can
be reliably caught. In the winder unit 10, defect in the package 30
thus can be prevented.
In the present embodiment, when the upper-yarn catching member
26 is located at the standby region R2 after catching at the catching
region R1, the yarn end 30a of the package 30 rotating at the yarn-end
catching speed, the unit control section 50 controls the package
driving motor 41 to rotationally drive the package 30 at the yarn
guiding speed that is faster than the yarn-end catching speed.
Consequently, in the winder unit 10, the yarn 20 can be guided to
the splicer device14 atahigh speedby theupper-yarncatchingmember
26, thereby allowing reduction in time. In the winder unit 10,
operation efficiency thus can be improved.
In the present embodiment, the unit control section 50 controls
the package driving motor 41 to rotationally drive the package 30
at the yarn-end catching speed the number of rotations set by the
setting section 91. Then, after the package 30 is rotated the number
of rotations, theunit control section 50 controlsthepackagedriving
motor 41 to proceed to the operation of rotationally driving the
package 30 at the yarn guiding speed. In this manner, in the winder
unit 10, since an assumption is made without using a sensor or the
like that the upper-yarn catching member 26 has caught the yarn end
30a of the package 30, switching from the yarn-end catching speed
tothe yarnguiding speedcanbeperformedwitha simple configuration
and control.
In the present embodiment, when continuation of the yarn 20 is
disconnected, the unit control section 50 controls the traverse arm
74tobeunder standby atoneendin the traversedirection. Therefore,
in the winder unit 10, when performing the yarn joining operation
or the like upon the disconnection of the yarn 20, the yarn 20 can
be prevented from being caught in the traverse arm 74. Consequently,
damage on the traverse arm 74 and/or a disconnection of the yarn 20
guided by the upper-yarn catching member 26 can be prevented.
In the present embodiment, when the upper-yarn catching member
26 catches the yarn end 30a of the package 30, in other words, when
the upper-yarn suction mouth 35 of the upper-yarn catching member
26 is located at the catching region R1, the air cylinder 60 of the
winder unit 10 brings the package 30 and the contact roller 29 into
a non-contact state. Consequently, in the winder unit 10, when
catching the yarn end 30a of the package 30, the yarn end 30a can
be prevented from being sandwiched between the package 30 and the
contact roller 29 and from sticking to the surface of the package
30. In the winder unit 10, the yarn end 30a of the package 30 thus
can be reliably caught.
In the present embodiment, the upper-yarn catching member 26
is driven by the independently provided motor 38. In the winder unit
10, operation of the upper-yarn catching member 26 thus can be
independently and accurately controlled.
The present invention is not limited to the above-described
embodiment. As illustrated in F I G . 10, the unit control section 50
may control the package driving motor 41 such that the rotational
speed of the package 30 at the yarn-end catching speed is changed
in two stages. The yarn-end catching speed includes the first speed
at which the upper-yarn catching member 26 starts catching the yarn
end 30a of the package 30 and a second speed that is faster than the
first speed.
The unit control section 50 controls the package driving motor
41 such that the package 30 is rotated at the second speed after being
rotationally driven at the first speed. Consequently, the yarn end
30a ofthe package 30 canbe further reliablycaughtbythe upper-yarn
suction mouth 35 of the upper-yarn catching member 26.
As illustrated in F I G . 11, the unit control section 50
rotationally drives the package 30 at the yarn-end catching speed
in the unwinding direction A, and causes the upper-yarn suction mouth
35 of the upper-yarn catching member 26 to be located at the catching
region R1 to catch the yarn end 30a of the package 30. After
rotationally driving the package 30 in the unwinding direction A a
predetermined number of times, the unit control section 50 moves the
upper-yarn suction mouth 35 of the upper-yarn catching member 26 in
thedirectiontobelocatedaway fromthepackage 30, androtationally
drives the package 30 in the winding direction. Then, after
rotationally driving the package 30 in the winding direction a
predetermined number of times, the unit control section 50
rotationally drives the package 30 at the yarn-end catching speed
in the unwinding direction A, and causes the upper-yarn suction mouth
35 of the upper-yarn catching member 26 to be located at the catching
region R1 again.
Subsequently, the unit control section 50 rotationally drives
the package 30 at the yarn guiding speed in the unwinding direction
A, and causes the upper-yarn suction mouth 35 of the upper-yarn
catching member 26 to be located at the standby region R2.
Consequently, since a slack of the yarn 20 can be eliminated on the
package 30, the upper-yarn catching member 26 can be prevented from
catching the yarn 20 that exists on a surface layer of the package
30.
As illustrated in FIG. 12, when the upper-yarn catching member
26 is located at the catching region R1 and the standby region R2,
the unit control section 50 may control the rotational speed of the
package driving motor 41 to be constant.
In the above-described embodiment, the package 30 is
rotationallydrivendirectlybythepackagedrivingmotor 41, however,
in the present invention, a method in which the contact roller 29
is rotationally driven to rotate the package 30 may be also employed.
In this case, if the package 30 is moved to the non-contact position
Q1 and is rotated in the unwinding direction A, a mechanism for
rotating the package 30 in the unwinding direction A is further
provided in the winder unit 10. In the case of the method in which
the contact roller 29 is rotationally driven to rotate the package
30, the rotationalspeedofthepackage 30is notdirectlycontrolled,
but rotational speed of the contact roller 29 is controlled.
In the above-described embodiment, although the arm-type
traverse device 70 is described as an example, the traverse device
may be a drum having a traverse groove, a belt-type traverse or a
rod-type traverse. In a case of traversing with the drum having the
traverse groove, the package driving motor 41 directly drives the
drumhavingthetraverse groove. In this case, bymaking contact with
the driven drum having the traverse groove, the package 30 rotates
el in response to drive force from the drum having the traverse groove.
Therefore, at the time of the above-described withdrawal operation
oftheupper yarn, the package 30is rotatedintheunwindingdirection
A while being in contact with the drum having the traverse groove.
5 The above-described embodiment allows prevention ofthe double
withdrawal from the package 30, however, the double withdrawal is
not completely resolved. In particular, in a case where after the
double withdrawal occurs, the yarn 20 is cut and a yarn waste, which
isacutyarnend30a, is woundaroundthepackage 30, a serious problem
10 may occur in subsequent processing. In addition, in a case where the
upper yarn of the package 30 cannot be sucked and caught by the
upper-yarn suction mouth 35 in the catching operation or in a case
where a sucking and catching error occurs in which, e. g., the upper
yarn sucked and caught by the upper-yarn suction mouth 35 disengages
15 from the upper-yarn suction mouth 35, a yarn joining cycle (the
catching operation, the standby operation and the guiding operation)
needstobe repeatedas describedabove, which is not preferable since
operation efficiency is reduced.
Description will be made on an upper-yarn withdrawal operation
20 for preventing repetition of the yarn joining cycle in the case where
the upper yarn of the package 30 cannot be sucked and caught by the
upper-yarn suction mouth 35 or in the case where the sucking and
catching error in which, e.g., the upper yarn sucked and caught by
theupper-yarnsuctionmouth35disengages fromtheupper-yarnsuction
25 mouth 35 occurs. Redundant description of a configuration in common
with the above-described embodiment will be omitted.
As illustrated in FIGS. 13 and 15, the unit control section 50
rotationally drives the package 30 at the yarn-end catching speed
in the unwinding direction A, and causes the upper-yarn suction mouth
30 35 of the upper-yarn catching member 26 to be located at the catching
region R1 to perform a first catching operation to catch the yarn
end 30a of the package 30 (FIG. 15A). Subsequently, after
rotationally driving the package 30 in the unwinding direction A a
predetermined number of times in the first catching operation, the
35 unit control section 50 causes a separating operation to move the
upper-yarn suction mouth 35 i n a d i r e c t i o n t o be l o c a t e d away from
t h e package 30 (FIG. 15B) tobeperformed. In t h e present embodiment,
t h e upper-yarn s u c t i o n mouth 35 is moved t o t h e standby region R2
i n t h e s e p a r a t i n g o p e r a t i o n . T h e y a r n e n d 3 0 a o f t h e p a c k a g e 3 0 , which
s t i c k s t o t h e s u r f a c e o f t h e package 30, canbe peeled f r o m t h e s u r f a c e
of t h e package 30 by t h i s movement. Although t h e upper-yarn
withdrawal o p e r a t i o n can be performed by t h e s e p a r a t i n g operation,
t h e above-described yarn cut a f t e r t h e double withdrawal may occur
according t o a yarn type o r a yarn s t a t e . Furthermore, t h e case where
t h e upper yarn cannot be sucked and caught by t h e upper-yarn suction
mouth 35 or t h e sucking and catching e r r o r i n which t h e upper yarn
t h a t has been sucked and caught by t h e upper-yarn s u c t i o n mouth 35
disengage from t h e upper-yarn suction mouth 35 may occur.
T h e u n i t c o n t r o l s e c t i o n 5 0 t h u s c o n t r o l s t h e u p p e r - y a r n s u c t i o n
mouth 35 t o perform a second catching operation, which is a catching
o p e r a t i o n f o r t h e second t i m e , a f t e r t h e s e p a r a t i n g o p e r a t i o n and
before t h e standby o p e r a t i o n (FIG. 15C). In t h e second catching
operation, t h e upper-yarn suction mouth 35 is moved t o t h e catching
region R1 again and is caused t o perform t h e catching operation. In
t h e present embodiment, t h e f i r s t c a t c h i n g o p e r a t i o n t h a t is a
catching o p e r a t i o n f o r t h e f i r s t t i m e and t h e second catching
o p e r a t i o n t h a t is t h e c a t c h i n g o p e r a t i o n f o r t h e second t i m e a r e
performed. Since, a l s o i n t h e second catching operation, a catching
o p e r a t i o n is performed by t h e upper-yarn s u c t i o n mouth 35 a t t h e
catching r e g i o n R 1 a s i n t h e f i r s t catching operation, t h e yarnwaste,
which has been generated by t h e yarn cut a f t e r t h e double withdrawal,
can be sucked and removed by t h e upper-yarn catching member 26. In
a d d i t i o n , i n a case where t h e sucking and catching e r r o r occurs i n
t h e f i r s t c a t c h i n g o p e r a t i o n , t h e y a r n e n d 3 0 a t h a t c o u l d n o t b e caught
can be caught.
Subsequently, t h e u n i t c o n t r o l s e c t i o n 50 c o n t r o l s t h e
upper-yarn catching member 26 t o perform t h e standby operation t o
s t o p a n d b e under standby a t t h e standbyregionR2 wherethe upper-yarn
catching member 26 is l o c a t e d f a r t h e r away from t h e package 30 than
t h e c a t c h i n g r e g i o n R1 (FIG. 15D). The standby operation of t h e
upper-yarn catching member 26 is adjusted according t o t h e diameter
of t h e package 30, t h e length of t h e yarn d e f e c t included i n t h e yarn
20 a n d t h e r o t a t i o n a l s p e e d o f t h e package 30. T h i s allows prevention
of t h e double withdrawal i n t h e winder u n i t 10 i n which a yarn 20
on t h e surface o f t h e p a c k a g e 3 0 i s a l s o suckedandcaughtwhen sucking
t h e yarn end 30a from t h e package 30 and removing t h e yarn d e f e c t .
In a d d i t i o n , t h e yarn end 30a of t h e package 30 can be r e l i a b l y caught.
Then, t h e u n i t c o n t r o l s e c t i o n 5 0 p e r f o r m s t h e g u i d i n g o p e r a t i o n (FIG.
15E).
Although, i n t h e above-described embodiment, t h e upper-yarn
suction mouth 35 is stopped a t t h e standby region R2 i n t h e s e p a r a t i n g
operation, t h e s e p a r a t i n g o p e r a t i o n merely needs t o peel t h e yarn
end 30a of t h e package 30, which s t i c k s t o t h e s u r f a c e of t h e package
30, from t h e s u r f a c e of t h e package 30 by t h e movement. Therefore,
a s e p a r a t i n g r e g i o n i n w h i c h t h e u p p e r - y a r n s u c t i o n m o u t h 3 5 i s stopped
i n t h e s e p a r a t i n g o p e r a t i o n may be provided s e p a r a t e l y from t h e
standby region R2. The s e p a r a t i n g region is a region where t h e yarn
end 30a can be peeled from t h e s u r f a c e of t h e package 30 and, i f t h e
s e p a r a t i n g region is a p o s i t i o n where t h e yarn end 30a sucked and
caught by t h e upper-yarn s u c t i o n mouth 35 does not disengage from
theupper-yarn suctionmouth 35, a n o p e r a t o r candecide t h e s e p a r a t i n g
region a t h i s / h e r d i s c r e t i o n .
In t h e present embodiment, a c o n t r o l value r e l a t i n g t o
adjustment of t h e second c a t c h i n g o p e r a t i o n can be set i n d e t a i l by
t h e s e t t i n g s e c t i o n 91 t o r e l i a b l y remove t h e yarn waste and catch
t h e yarn end i n t h e second catching operation.
As i l l u s t r a t e d i n FIG. 1 4 , t h e u n i t c o n t r o l s e c t i o n s 50 of a
p l u r a l i t y of t h e winder u n i t s 10 a r e connected t o t h e machine s e t t i n g
device 90 t h a t includes t h e s e t t i n g s e c t i o n 91. In FIG. 1 4 , although
merely twowinder u n i t s 10 a r e described, s e v e r a l t e n s of winder u n i t s
10 can be connected. As described above, t h e motor 38 is connected
t o t h e u n i t c o n t r o l s e c t i o n 50, and t h e upper-yarn catching member
26 is driven by t h e motor 38. In t h e present embodiment, t h e machine
s e t t i n g device 90 includes t h e s e t t i n g s e c t i o n 91, however, a
c o n f i g u r a t i o n i n which each u n i t c o n t r o l s e c t i o n 50 includes an own
0 setting section may be employed.
The setting section 91 includes a time setting section 911
adaptedto seta periodof time in which the second catching operation
is performed, and a number-of-rotation setting section 912 adapted
5 to set the number of rotations for the second catching operation.
The unit control section 50 controls the upper-yarn catching member
26 to perform the second catching operation based on at least either
one of the period of time set by the time setting section 911 or the
number of rotations set by the number-of-rotation setting section
10 912.
In a case where both the period of time and the number of
rotations are set in the setting section 91 as the control value
relating to the adjustment of the second catching operation, a
determination canbemade which setting is to be applied on a priority
15 basis. In a case, e.g., where production efficiency is considered
important, the period of time is applied on a priority basis and,
in a case where product quality is considered important, the number
of rotations is applied on a priority basis. In a case the number
of rotations is applied on a priority basis, a yarn waste can be
20 reliably removed by rotating a predetermined number of rotations.
Furthermore, since the diameter of the package 30 becomes large as
the yarn 20 is wound, as the winding operation proceeds, time for
rotating the package one time becomes longer. Thus, the number of
rotations may be applied at the time of a small diameter in which
25 a wound amount of the package 30 is small and thereby the time for
one rotation of the package 30 is short. The period of time may be
applied at the time of a large diameter in which the wound amount
of the package 30 is large and thereby the time for one rotation of
the package 30 is long.
When the clearer 15 cannot detect the upper yarn that has been
guided after the completion of the guiding operation, the
determination can be made that guiding of the yarn end 30a of the
package 30 to the splicer device 14 has failed. The guiding failure
may be a failure in the first catching operation, a failure in the
35 second catching operation, a failure in the guiding operation, or
the like. In a case where the determination is made that the guiding
has failed, the unit control section 50 controls the upper-yarn
catching member 26 to perform a repeating operation in which the
catching operation, the standby operation and the guiding operation
are repeated. With this configuration, since there is performed the
repeating operation in which each of the operations is repeated by
the upper-yarn catching member 26 in the case where guiding of the
yarn 20 from the package 30 to the yarn joining device 14 has failed,
guiding of the yarn 20 from the package 30 can be performed again
without manual operation by the operator. The unit control section
50 is configured capable of setting the control value relating to
the adjustment of the second catching operation of the upper-yarn
catching member 26 in performingthe repeating operation. With this
configuration, in the case where guiding of the yarn 20 from the
package 30 to the splicer device 14 has failed, the second catching
operationbytheupper-yarncatchingmember26 canbe controlledunder
a different condition when the repeating operation to repeat each
ofthe above-described operations is being performed. The period of
time or the number of rotations of the second catching operation,
e.g., can be sufficiently large. Consequently, success rate of the
guiding of the yarn 20 from the package 30 can be improved.
Furthermore, since the repeating operation is performed only at the
time of the guiding failure, even if the period of time and the number
of rotations are sufficiently large, operation time is not
considerably extended.
In the above-described embodiment, the diameter of the package
30 is detected by detecting the swing angle of the cradle 23 with
the angle sensor 44. However, the diameter of the package 30 may be
detected by another method. The diameter of the package 30 can be
acquired based on, e.g., a total length of the yarn 20 wound around
the package 30, a winding speed of the yarn 20 and a yarn type (a
thickness or the like of the yarn 20).
The diameter ofthe package 30mayalsobe acquiredbymeasuring
time fromthe s t a r t o f w i n d i n g t h e y a r n 2 0 . Inacasewherethewinding
speed and the yarn type (the thickness or the like of the yarn 20)
are known, the diameter of the package 30 can be acquired by
calculating based on the time elapsed from the start of winding the
yarn 20. By storing in the unit control section 50 in advance, a
relation between the time elapsed from the start of winding and the
diameter of the package 30, the diameter of the package 30 can be
acquired based on the elapsed time. When the winding is interrupted
by the yarn disconnection, the yarn joining operation, or the like,
measurement of the time elapsed from the start of winding is
interrupted.
The diameter of the package 30 may also be calculated based on
a travelling speed of the yarn 20. Specifically, a traverse angle
is calculated by the travelling speed and a traverse speed of the
yarn20. Furthermore, aperipheralspeedofthepackage30isacquired
based on the traverse angle and the yarn travelling speed. Then, the
diameter ofthe package 30 is calculatedbasedon the rotational speed
and the peripheral speed of the package 30.
In the yarn winding machine, the control section performs the
first catching operation, which is performed for the first time as
a catching operation at the catching region to suck and catch the
yarn from the package, and the second catching operation, which is
a catching operation performed for the second time. By the second
catching operation, a yarn waste, which is generated by a yarn cut
performedafteradoublewithdrawaloccurs, canbe suckedandremoved.
In addition, in a case where a sucking and catching error occurs in
the first catching operation, the yarn end that could not be caught
can be caught. Furthermore, since the setting section adapted to
adjust the secondcatching operation is provided, the second catching
operation can be performed under an optimal condition that suits a
yarn winding condition. Accordingly, this preferably allows
removing the yarn waste and catching the yarn end that could not be
caught.
In one embodiment, the yarn winding machine further includes
a yarn supplying section adaptedto supply the yarn tobe woundaround
the package, a second catching and guiding device adapted to catch
the yarn from the yarn supplying section and to guide the yarn, a
yarn joining device adapted to join the yarn from the package guided
by the first catching and guiding device and the yarn from the yarn
supplying section guided by the second catching and guiding device
when continuation of the yarn is disconnected between the yarn
supplying section and the package, and the yarn detecting device
providedinapathwheretheyarntravelsduringyarnwindingoperation
and adapted to determine whether or not the yarn from the package
has been guided to the yarn joining device by the first catching and
guiding device. The target region is a receiving position where the
yarn joining device receives the yarn. Since this configuration
allows the determination to be made whether or not the yarn from the
package has been guided to the yarn joining device, a determination
can be made whether or not to be able to perform yarn joining by the
yarn joining device, which is a next step. In addition, with the
above-described configuration, since determinations whether or not
the yarn joining has been performed are collectively made after
carrying out the catching operation, the separating operation, the
standby operation and the guiding operation two times, waiting time
can be saved in comparison with a configuration in which the
determination is made between the operations. Furthermore, since
success rate of catching the yarn is improved by performing the
catching operation two times, entire operationefficiencyis improved
by collectively making the determinations. When a large amount of
failures occurs, operation efficiency may be reduced in some cases
by collectively making the determinations, however, in this case,
the entire operation efficiency can be improved by adjusting the
second catching operation with the setting section and by improving
the success rate.
In one embodiment, in a case where a determination is made by
the yarn detecting device that guiding of the yarn from the package
to the yarn joining device by the first catching and guiding device
has failed, the control section controls the first catching and
guiding device to perform a repeating operation in which each of the
first catching operation, the separating operation, the second
catching operation and the guiding operation is repeated by the first
catchingandguidingdevice. Withthis configuration, ina casewhere
the guiding of the yarn from the package to the yarn guiding device
has failed, since the repeating operation in which each of the first
catching operation, the separating operation, the second catching
operation and the guiding operation is repeatedby the first catching
and guiding device is performed, the guiding of the yarn from the
package can be performed again without manual operation by an
operator.
In one embodiment, the setting section is configured to be
capable of setting the control value relating to the adjustment of
the secondcatching operationby the firstcatchingandguidingdevice
in performing the repeating operation. With this configuration, in
the case where the guiding of the yarn from the package to the yarn
joining device has failed, the first catching and guiding device can
be controlled under a different condition when performing the
repeating operation in which each of the first catching operation,
the separating operation, the second catching operation and the
guiding operation is performed. Consequently, success rate of
guiding of the yarn from the package is improved.
The setting section includes at least either one of a time
setting section adapted to set a period of time in which the second
catching operation is performed or a number-of-rotation setting
sectionadaptedto set the number of rotations forthe secondcatching
operation. The control section controls the first catching and
guiding device to perform the second catching operation based on,
as the control value relatingtothe adjustment ofthe secondcatching
operation, at least either one of the period of time set by the time
setting section or the number of rotations set by the
number-of-rotation setting section. Consequently, the second
catching operation can be performed under an optimal condition that
suits production purpose.
In one embodiment, the control section controls the first
catching and guiding device to perform the second catching operation
with a priority on the period of time in a case where the setting
section sets both the period of time with the time setting section
and the number of rotations with the number-of-rotation setting
section. Withthis configuration, since the periodof time is applied
on a priority basis, the second catching operation is prevented from
unnecessarily taking time, thereby improving production efficiency.
In one embodiment, the control section is adapted to control
the first catching and guiding device to perform the second catching
operationwitha priorityon the number of rotations in the case where
the setting section sets both the periodof time with the time setting
section and the number of rotations with the number-of-rotation
setting section. With this configuration, since the number of
rotations is applied on a priority basis, which allows rotation of
the package as much as required in the second catching operation,
prevention of the yarn waste from mixing in and prevention of a yarn
catching error can be both realized, thereby improving production
quality.
In one embodiment, the yarn detecting device serves as a yarn
defect detecting device adapted, in a case where a yarn defect is
included in the yarn being wound around the package, to detect the
yarn defect. With this configuration, the yarn detecting device can
double as the yarn defect detecting device, thereby allowing a
configuration of the yarn winding machine to be simplified.
In one embodiment, the yarn supplying section is configured to
be capable of setting a yarn supplying bobbin around which a yarn
is wound. With this configuration, in an automatic winder, yarn
joining operation is appropriately performed and thereby winding the
yarn around the package can be smoothly resumed in the yarn w'inding
machine.
In one embodiment, a textile machine including a plurality of
the yarn winding machines further includes a machine setting device
adapted to control each of the yarn winding machines. The setting
section is arranged in the machine setting device. With this
configuration, since setting of the yarn winding machine provided
in plural can be collectively changed by the setting section in the
machine setting device, change in the setting is not required to be
performed in every yarn winding machine, thereby saving trouble of
6 the Operator-
With t h e present invention, d e f e c t i n t h e package can' be
prevented.

".. ,\ && .A I '
sb-6 1 We Claim: P$ 3 A,, ~ 1. A yarn winding machine (10) comprising: 10\3
a winding u n i t main body (16) adapted t o form a package (30)
by winding a yarn (20) ;
5 a firstcatchingandguidingdevice (26) p r o v i d e d i n t h e w i n d i n g
u n i t main body (16) and adapted t o suck and catch t h e yarn (20) from
t h e package (30) and t o guide t h e yarn (20) ; c h a r a c t e r i z e d by
a c o n t r o l s e c t i o n (50) adapted t o c o n t r o l t h e f i r s t catching
and guiding device (26) t o perform a first c a t c h i n g o p e r a t i o n a t a
10 c a t c h i n g r e g i o n ( R l ) t o suck and catch t h e yarn (20) from t h e package
( 3 0 ) , a s e p a r a t i n g o p e r a t i o n t o s e p a r a t e t h e f i r s t catching and
guiding device (26) a t t h e catching region ( R l ) from t h e package (30)
t o withdraw t h e yarn ( 2 0 ) , which has been sucked and caught, from
a surface of t h e package ( 3 0 ) , a guiding o p e r a t i o n t o guide t h e yarn
15 (20) t o a t a r g e t region (R3), and a second c a t c h i n g o p e r a t i o n a t t h e
catching region ( R l ) t o suck and catch t h e yarn (20) from t h e package
(30) againbetweenthe separatingoperationandtheguidingoperation;
and
a s e t t i n g s e c t i o n (91) adapted t o set a c o n t r o l value r e l a t i n g
20 t o adjustment of t h e second c a t c h i n g o p e r a t i o n by t h e f i r s t catching
and guiding device (26) .
2. The yarn winding machine ( 1 0 ) according t o claim 1, f u r t h e r
comprising:
2 5 a yarn supplying s e c t i o n (11) adapted t o supply t h e yarn (20)
t o be wound around t h e package ( 3 0 ) ;
a second catching and guiding device (25) adapted t o catch t h e
yarn (20) from t h e yarn supplying s e c t i o n (11) and t o guide t h e yarn
(20) ;
a yarn j o i n i n g device ( 1 4 ) adapted t o j o i n t h e yarn (20) from
t h e package (30) guided by t h e f i r s t catching and guiding device (26)
and t h e yarn (20) from t h e yarn supplying s e c t i o n (11) guided by the
second catching and guiding device (25) when c o n t i n u a t i o n of t h e yarn
(20) between t h e package (30) and t h e yarn supplying s e c t i o n (11)
35 is disconnected; and
.. C"" * k s E +.- ~--"C ' &* ~f * ~, ,& P",$" 7' ,d' !n ,: !+ .+: 1
q) $"\? d.% , . ; L.; ,- . --*
1;;4d . ' *
a yarn detecting device (15) provided in a path where the yarn
(20) travels during yarn winding operation, the yarn detecting device
(15) being adapted to determine whether or not the yarn (20) from
the package (30) has been guided to the yarn joining device (14) by
the first catching and guiding device (26),
whereinthe target region (R3) isadaptedto serveasareceiving
position where the yarn joining device (14) receives the yarn (20).
3. The yarn winding machine (10) according to claim 1 or claim
2, wherein the control section (50) is adapted to control the first
catching and guiding device (26) to perform a repeating operation
to perform each of the first catching operation, the separating
operation, the second catching operation and the guiding operation
again in a case where a determination is made by the yarn detecting
device (15) that guiding of the yarn (20) from the package (30) to
the yarn joining device (14) by the first catching and guiding device
(26) has failed.
4. The yarn winding machine (10) according to claim 3, wherein
the setting section (91) is adapted to be capable of setting a control
value relating to adjustment of the second catching operation by the
first catching and guiding device (26) in performing the repeating
operation.
5. The yarn winding machine (10) according to any one of claim
1 through claim 4, wherein the setting section (91) includes at least
either one of a time setting section (911) adapted to set a period
of time in which the second catching operation is performed or a
number-of-rotation setting section (912) adapted to set the number
of rotations for the second catching operation, the control section
(50) is adapted to control the first catching and guiding device (26)
to perform the second catching operation based on at least either
one of the period of time set by the time setting section (911) or
the number of rotations set by the number-of-rotation setting section
(912).
I
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4. AL. 20\3 3~lq311
I e s* $:
6. The yarn winding machine ( 1 0 ) according t o claim 5, wherein
t h e c o n t r o l s e c t i o n (50) is adapted t o c o n t r o l t h e f i r s t catching
andguiding device (26) t o p e r f o r m t h e second c a t c h i n g o p e r a t i o n with
5 a p r i o r i t y on t h e period of t i m e i n a case where t h e s e t t i n g s e c t i o n
(91) s e t s both of t h e period of t i m e with t h e time s e t t i n g s e c t i o n
(911) andthenumber of r o t a t i o n s with t h e number-of-rotation s e t t i n g
s e c t i o n (912) .
10 7. The yarn winding machine (10) according t o claim 5, wherein
t h e c o n t r o l s e c t i o n (50) is adapted c o n t r o l t h e f i r s t catching and
guiding device (26) t o perform t h e second catching o p e r a t i o n with
a p r i o r i t y on t h e number of r o t a t i o n s i n t h e case where t h e s e t t i n g
s e c t i o n (91) s e t s both of t h e period of t i m e with t h e time s e t t i n g
15 s e c t i o n (911) andthenumber of r o t a t i o n s w i t h t h e number-of-rotation
s e t t i n g s e c t i o n (912).
8. The yarn winding machine (10) according t o any one of claim
2 through claim 7, wherein i n a case where a yarn d e f e c t is included
20 i n t h e yarn (20) being wound around t h e package ( 3 0 ) , t h e yarn
d e t e c t i n g device (15) is a yarn d e f e c t d e t e c t i n g s e c t i o n (15) adapted
t o d e t e c t t h e yarn d e f e c t .
9. The yarn winding machine (10) according t o claim 8, wherein
25 a yarn supplying bobbin around which a yarn is wound can be s e t i n
t h e yarn supplying bobbin (11) .
10. A t e x t i l e machine (1) comprising a p l u r a l i t y of t h e yarn
winding machines (10) according t o any one of claim 1 through claim
30 9, t h e t e x t i l e machine (1) f u r t h e r including a machine s e t t i n g device
(90) adaptedtocontroleachofthe yarnwindingmachines ( l o ) , wherein
t h e s e t t i n g s e c t i o n (91) is provided i n t h e machine s e t t i n g device
(90)
11. Ayarnwindingmachine, s u b s t a n t i a l l y a s h e r e i n d e s c r i b e d
with reference
Dated this
to accompanying drawings and
day of November 2013
b."' 7
examples.
A
Of Anand and Anand Advocates
Agent for the Applicant