YARN WINDING DEVICE, YARN WINDING METHOD, AND YARN WINDING SYSTEM
BACKGROUND OF THE INVENTION
1. Field of the Invention
5 The present invention r e l a t e s to a yarn winding device, a yarn
winding method, and a yarn winding system adapted to wind a yarn to
form a package.
2 . Description of the Related A r t
10 Japanese Patent PublicationNo. 3564817 discloses anautomatic
winderincludingapluralityofwindingunits. Onewindingunitwinds
ayarn, whichisunwound fromayarnsupplyingbobbin, aroundawinding
tube, which is supported by a cradle, while traversing with a winding
drum including a traverse groove to form a package.
15
As the remainingamountof the yarnof the yarn supplyingbobbin
reduces, theunwoundyarnandtheyarnsupplyingbobbintendto e a s i l y
rub against each other thus increasing the unwinding resistance, and
hence problems in that the tensionof the yarnincreases andunwinding
20 abnormality such as yarn breakage, sloughing (hoop drop-out), and
the l i k e e a s i l y generates a r i s e . In the automatic winder described
inJapanese Patent PublicationNo. 3564817, when the remaining amount
of the yarn becomes l e s s than or equal to a prescribed amount, the
tension to be applied on the yarn with the tensor is lowered. When
25 the remaining amount of the yarn further reduces and cannot be
respondedbysimplyreducingthetensionwiththetensor, t h e r o t a t i o n
speedofthetraversedrumisloweredtodeceleratethewindingspeed.
In Japanese Patent Publication No. 3564817, the s e t value of the
winding speed is constant i n a s t a t e that there is a great amount
30 of yarn remaining on the yarn winding bobbin ( u n t i l becoming less
than or equal to the prescribed amount).
BRIEF SUMMARY OF THE INVENTION
The behavior ( h e r e i n a f t e r r e f e r r e d to as yarn unwinding
property) of the yarn often differs depending on the yarn supplying
bobbin even if the yarn is unwound with the same condition for the
unwinding speed, and the like. For example, if there is an area where
the yarn is softly wound in the yarn supplying bobbin, sloughing,
5 in which the yarn becomes a ring-shaped clump and drops off, may occur
at the portion where the winding is soft if the yarn is unwound at
high speed in the automatic winder. Furthermore, if the winding
manner is common among the plurality of yarn supplying bobbins such
as when a great number of yarn supplying bobbins are simultaneously
10 manufactured with a spinning device, abnormality such as sloughing
easily occurs at substantially the same yarn unwinding position when
unwindingthe yarn fromthepluralityof yarn supplyingbobbins. Thus,
the unwinding abnormality tends to easily generate at the same yarn
unwinding position among the yarn supplying bobbins in which a
15 specific condition is the same.
In regards to this, in the conventional automatic winder such
as described in Japanese Patent Publication No. 3564817, the winding
speed in a state there is a great amount of yarn remaining on the
I yarn supplying bobbin is set constant. Thus, when using the yarn
I
20 supplying bobbin in which the sloughing and the like may possibly
occur at a specific yarn unwinding position, the unwinding of the
yarn of the entire yarn supplying bobbin is carried out with the
winding speed sufficiently lowered so that abnormality does not
generate at the relevant specific yarn unwinding position. In other
25 words, abnormality does not generate even if the yarn is wound at
a higher winding speed in a normal situation when unwinding the yarn
at a position other than the specific yarn unwinding position, but
in the prior art, the yarn is unwound at a low speed corresponding
to the specific yarn unwinding position even at such a position, and
30 as a result, the productivity is lowered.
It is an object of the present invention to enhance the
productivity by setting an appropriate winding speed in accordance
with the yarn unwinding property of the yarn supplying bobbin.
Ayarnwindingdevice of a first aspect includes a yarn supplying
1 @ section adapted to hold a yarn supplying bobbin; a winding section
adapted to wind a yarn unwound to one side in an axial direction from
the yarn supplying bobbin; a speed setting section adapted to set
a winding speed of the winding section; and a winding control section
5 adapted to control the winding section based on the winding speed
set by the speed setting section; wherein the winding control section
I functionsasanunwindingpositiondetectingsectionadaptedtodetect
a yarn unwinding position of the yarn supplying bobbin; the speed
setting section divides a winding range in which the yarn is wound
10 in the yarn supplying bobbin to a plurality of individual setting
ranges and sets the winding speed of the winding section for each
ofthepluralityofindividualsettingranges; andthewinding control
section controls the winding section to wind the yarn at the winding
speed set with respect to the range in which the yarn unwinding
15 position is locatedinaccordance within which range ofthe plurality
of individual setting ranges the detected yarn unwinding position
is located.
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 perspective view of an automatic winder according
to the present embodiment;
F I G . 2 is a front view of one winding unit of the automatic
winder;
F I G . 3 is a block diagram schematically illustrating an
25 electrical configuration of the automatic winder;
F I G . 4 is a front view of a yarn supplying bobbin;
F I G . 5 is a graph illustrating one example of a winding speed
control of an accumulating device corresponding to a yarn unwinding
position;
30 F I G . 6 is an explanatory view on determining weighting
coefficients of seven individual setting ranges according to an
alternative embodiment; and
F I G . 7 is a front view of one winding unit of an automatic winder
according to another alternative embodiment.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
I An embodiment of the present invention will now be described.
The present embodiment is an example in which the present invention
5 is applied to an automatic winder including a plurality of winding
units adapted to wind a yarn unwound from a yarn supplying bobbin
around a winding tube to form a package. FIG. 1 is a front view of
an automatic winder according to the present embodiment, and FIG.
2 is a front view of one winding unit 2 of the automatic winder.
I 10 As illustrated in FIG. 1, the automatic winder 1 (yarn winding
device) includes a plurality of winding units 2 arranged in a line
in a right and left direction of FIG. 1, a doffing device 3 arranged
in a freely travelling manner in a direction the plurality of winding
! units 2 are arranged, andamachinecontroldevice 4 adaptedtoperform
15 an overall control of the automatic winder 1. The machine control
device 4 is arranged at one end in the direction the winding units
2 are arranged in a line.
The automatic winder 1 is configured to transmit a command to
each of the plurality of winding units 2 from the machine control
20 device 4 , and wind a yarn Y unwound from a yarn supplying bobbin 8
around a winding tube 17 (see FIG. 2) to form a package P in each
winding unit 2. When a fully-wound package P is formed in a certain
winding unit 2, the doffing device 3 moves to above the relevant
winding unit 2 and changes the fully-wound package P with an empty
25 winding tube 17. The machine control device 4 controls the operation
of each winding unit 2, and also performs monitoring of the operation
state, the setting and storing of the operation parameters, and the
like. The machine control device 4 includes a display operation
section 50. The display operation section includes a display section
30 adapted to indicate the operation states of each winding unit 2 and
the doffing device 3, a button and a switch adapted to perform the
setting of the operation parameters, and the like of each winding
unit 2, and the like.
The detailed configuration of each winding unit 2 will now be
@ described. The winding unit 2 illustrated in F I G . 2 winds the spun
yarn Y unwound from the yarn supplying bobbin 8 around the winding
1 tube 17 while traversing to form into the package P of a prescribed
I
shape.
5 The winding unit 2 includes a unit machine 10, a yarn supplying
section 11 adapted to unwind the yarn Y of the yarn supplying bobbin
8 andsupplythe yarnY, a yarnprocessingexecuting section12 adapted
to perform various processing on the yarn Y supplied from the yarn
I
supplying section 11, and a winding section 13 adapted to wind the
10 yarn Y processed by the yarn processing executing section 12 around
t h e w i n d i n g t u b e 1 7 t o f o r m t h e p a c k a g e P . T h e u n i t m a c h i n e 1 0 i n c l u d e s
an operation panel 25 having a display unit, an operation button,
and the like, and a unit control section 26 (see F I G . 3) . The yarn
supplying section 11, the yarn processing executing section 12, and
15 the winding section 13 are arranged in this order in a line from top
to bottom.
The yarn supplying section 11 includes a peg 15 adapted to
replaceably hold the yarn supplying bobbin 8, and an unwinding
assisting device 16 adapted to assist the unwinding of the yarn Y
20 from the yarn supplying bobbin 8. The peg 15 is in a vertical state
illustrated in F I G . 2 at the time of unwinding of the yarn Y (time
of yarn winding). The peg 15 tilts forward and backward (direction
perpendicular to the plane of drawing of F I G . 2) when driven by a
peg driving section 28 (see F I G . 3 ) , so that the empty yarn supplying
25 bobbin 8 can be discharged and a new yarn supplying bobbin 8 can be
received from a magazine (not illustrated).
The unwinding assisting device 16 lowers a tube body 30, which
is placed over the yarn supplying bobbin 8 5rom the upper side, as
the unwinding of the yarn Y advances to regulate the expansion
30 (balloon) of the yarn Y being unwound and stabilize the unwinding
tension. More specifically, the unwinding assisting device 16
includes the tube body 30, a holding member 35 adapted to hold the
tube body 30, and an optical sensor 36 attached to the holding member
35. The holding member 35 is raised and lowered up and down by a tube
() body drive motor 37 including a stepping motor, so that the tube body
30 and the optical sensor 36 also move up and down with the holding
member 35. The optical sensor 36 includes a light emitting element
36a and a light receiving element 36b arranged on both sides of the
5 yarn supplying bobbin 8, and the optical sensor 36 detects a chess
section 8a of the yarn supplying bobbin 8 (a tapered end on the yarn
unwinding side of a yarn layer of the yarn supplying bobbin 8: see
FIG. 4).
Whentheposition (yarnunwindingposition) ofthe chess section
10 8a lowers with the advancement of the unwinding of the yarn Y, the
chess section 8a is no longer detected by the optical sensor 36. A
signal for driving the tube body drive motor 37 and lowering the tube
body 30 is then transmitted from the unit control section 26 to a
motor driver 38. The motor driver 38 receiving the signal transmits
15 a pulse signal to the tube body drive motor 37, and moves the holding
member 35 toward a side (lower side) opposite to the yarn unwinding
side up to a position where the chess section 8a is detected by the
optical sensor 36. In this case, a count sectionarrangedinthemotor
driver 38 counts the number of pulse signals transmitted to the tube
20 body drive motor 37 to lower the tube body 30. The tube body 30 thus
lowers following the change in the yarn unwinding position, and the
position relationship of the tube body 30 and the chess section 8a
is maintained constant. When the yarn Y of the yarn supplying bobbin
8becomes considerablysmall, theballoonoftheunwoundyarnYbecomes
25 small and hence does not need to be regulated with the tube body 30,
whereby the tube body 30 is configured so as not to further lower
when reaching a prescribed lower limit position.
The winding section 13 includes a cradle (not illustrated)
adapted to rotatably grip the winding tube 17, and a traverse drum
30 18 rotatably driven by the drum driving section 27 (see FIG. 3) . A
spiral-shaped traverse groove 18a is formed on the circumferential
surface of the traverse drum 18, so that the yarn Y is traversed by
the traverse groove 18a. Since the traverse drum 18 is rotatably
driven while making contact with the package P formed on the winding
@tube 17 while t r a v e r s i n g t h e yarn Y with t h e t r a v e r s e groove 18a,
t h e package P is r o t a t e d by a c o n t a c t i n g f r i c t i o n with t h e t r a v e r s e
drum 18, and t h e yarn Y unwound from t h e yarn supplying bobbin 8 is
wound around t h e winding tube 17.
5 The y a r n p r o c e s s i n g e x e c u t i n g s e c t i o n 1 2 includes a yarn f i l l e r
19, a tension applying device 20, a yarn j o i n i n g device 21, and a
yarn c l e a r e r 22.
The yarn f i l l e r 19 is adapted t o d e t e c t presence o r absence of
t h e yarn Y between t h e unwinding a s s i s t i n g device 16 and t h e tension
10 a p p l y i n g d e v i c e 2 0 . T h e t e n s i o n a p p l y i n g d e v i c e 2 0 i s a d a p t e d t o a p p l y
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 Y. FIG. 2 i l l u s t r a t e s
a gate-type i n c l u d i n g a f i x e d comb t o o t h 20a and a movable comb t o o t h
20b driven by a t e n s i o n applying device d r i v i n g s e c t i o n 30 (see FIG.
3) , by way of example.
15 The yarn j o i n i n g device 21 j o i n s a lower yarn Y 1 from t h e yarn
supplying bobbin 8 and an upper yarn Y2 from t h e package P a t t h e
t i m e o f yarn cut by a c u t t e r 22a when a yarn d e f e c t is detected by
t h e y a r n c l e a r e r 2 2 , t o b e d e s c r i b e d l a t e r , a t t h e t i m e o f yarnbreakage
during t h e winding, o r a t t h e time o f r e p l a c i n g t h e yarn supplying I
20 bobbin 8. One example of t h e yarn j o i n i n g device 21 is an a i r s p l i c e r
a d a p t e d t o p e r f o r m t h e yarn j o i n i n g o p e r a t i o n b y g e n e r a t i n g a n a i r f l o w
and e n t a n g l i n g t h e f i b e r s of t h e lower yarn Y 1 and t h e upper yarn
Y2.
A lower yarn catching and guiding member 23 adapted t o catch
25 t h e lower yarn Y 1 from t h e yarn supplying bobbin 8 and guide t h e lower
yarn Y 1 t o t h e yarn j o i n i n g device 21, and an upper yarn catching
and guiding member 24 adapted t o catch t h e upper yarn Y2 from t h e
package P and t o guide t h e upper yarn Y2 t o t h e yarn j o i n i n g device
2 1 a r e a r r a n g e d o n t h e l o w e r s i d e a n d t h e u p p e r s i d e o f t h e yarn joining
30 device 21, r e s p e c t i v e l y . The lower yarn catching and guiding member
23 and t h e upper yarn catching and guiding member 24 both have one
e n d r o t a t a b l y a t t a c h e d t o t h e u n i t m a c h i n e 1 0 . Furthermore, t h e lower
yarn catching and guiding member 23 and t h e upper yarn catching and
guiding member 24 a r e r e s p e c t i v e l y driven by a lower yarn guiding
I a m e m b e r d r i v i n g s e c t i o n 31 and an upper yarn guiding member d r i v i n g
s e c t i o n 32 (both i l l u s t r a t e d i n FIG. 3) t o be swung up and down.
A s u c t i o n p o r t 2 3 a o f t h e lower yarn catching and guidingmember
23 sucks and catches t h e yarn end of t h e lower yarn Y 1 , and swings
5 from t h e lower s i d e t o t h e upper s i d e t o guide t h e lower yarn Y 1 t o
t h e yarn j o i n i n g device 21. A t t h e same t i m e , t h e upper yarn catching
and guiding member 24 h a s a suction mouth 24a swung t o a yarn end
catching p o s i t i o n proximate t o a c o n t a c t i n g p o i n t of t h e package P
and t h e t r a v e r s e drum 18, and again swung t o t h e lower s i d e a f t e r
10 s u c k i n g a n d c a t c h i n g t h e y a r n e n d o f t h e upper yarnY2 fromthepackage
P a t t h e yarn end catching p o s i t i o n t o guide t h e upper yarn Y2 t o
t h e yarn j o i n i n g device 21. The yarn j o i n i n g device 21 j o i n s t h e yarn
end of t h e lower yarn Y 1 guided by t h e lower yarn catching and guiding
member 23 and t h e yarn end of t h e upper yarn Y2 guided by t h e upper
15 yarn catching and guiding member 24 t o o b t a i n one yarn Y. The winding
of t h e yarn Y by t h e winding s e c t i o n 13 is thereby resumed.
The yarn c l e a r e r 22 acquires information on a t h i c k n e s s of t h e
t r a v e l l i n g yarn Y on a constant b a s i s . In o t h e r words, t h e yarn
c l e a r e r 22 corresponds t o a y a r n t h i c k n e s s d e t e c t i n g s e c t i o n i n t h e
20 invention of t h e present a p p l i c a t i o n . Furthermore, t h e yarn c l e a r e r
22 d e t e c t s an abnormality p o r t i o n a t where t h e yarn t h i c k n e s s is
t h i c k e r o r t h i n n e r by a constant amount o r more e x i s t i n g i n t h e yarn
Y a s a yarn d e f e c t based on t h e information of t h e yarn t h i c k n e s s .
The yarn c l e a r e r 22 includes a c u t t e r 22a, and t h e c u t t e r 22a
25 immediately c u t s t h e yarn Y when t h e yarn d e f e c t is detected by t h e
yarn c l e a r e r 22.
The yarn d e f e c t remains i n t h e upper yarn Y2 i f t h e yarn Y is
cut a f t e r t h e d e t e c t i o n of t h e yarn d e f e c t of t h e yarn c l e a r e r 22,
but t h e lower yarn Y 1 and t h e upper yarn Y2 a r e joined a f t e r removing
30 t h e yarn d e f e c t from t h e upper yarn Y2 i n t h e yarn j o i n i n g device
21.
The e l e c t r i c a l c o n f i g u r a t i o n o f t h e automatic winder l w i l l n o w
be described. As i l l u s t r a t e d i n FIG. 3, t h e machine c o n t r o l device
4 of t h e automatic winder 1 is communicably connected t o t h e u n i t
c o n t r o l section 26 ofthe pluralityofwinding units 2 and the control
section 52 of the doffing device 3. The machine control device 4
monitors the operation state of each winding unit 2 and the operation
state of the doffing device 3. The machine control device 4 includes
a display operation section 50, and a winding condition storage
section 51 adapted to store the winding condition of each winding
unit 2 set from the display operation section 50.
Theunit control section 26 ofeachwindingunit2 is configured
by a CPU (Central Processing Unit), which is an arithmetic processing
unit, a ROM (Read-Only Memory) storing programs to be executed by
the CPU and data to be used in the programs, a RAM (Random Access
Memory) adapted to temporarily store the data at the time of program
execution, aninput/output interface a d a p t e d t o p e r f o r m i n p u t / o u t p u t
of data with the outside, and the like. The unit control section 26
controls the operation of each device of the winding unit 2 described
above based on the winding condition transmitted from the machine
control device 4. The unit control section 26 is also communicable
with the control section 52 of the doffing device 3, and outputs a
signal for causing the doffing device 3 to perform the doffing
operation when the fully-wound package P is obtained.
The display operation section 50 includes a display 50a
(correspond to "notifying section" in the present invention) adapted
to display various information, and an operation button group 50b
(correspond to "input sectio.nW in the present invention) enabling
the operator to performvarious setting. When the operator operates
the operation button group 50b of the display operation section 50
of the machine control device 4 to input, the various winding
conditions foreachwindingunit2 canbe setandchanged. Thewinding
condition set (changed) in the display operation section 50 is stored
in the winding condition storage section 51. In particular, in the
present embodiment, the setting of the winding ,condition by the
display operation section 50 includes the setting of the package
winding speed (i. e., unwinding speed of the yarn Y from the yarn
supplying bobbin 8) of the winding section 13 corresponding to the
y a r n u n w i n d i n g p r o p e r t y o f t h e y a r n s u p p l y i n g b o b b i n 8 . I n t h e p r e s e n t
embodiment, t h e d i s p l a y o p e r a t i o n s e c t i o n 50 of t h e machine c o n t r o l
device 4 corresponds t o t h e "speed s e t t i n g s e c t i o n " i n t h e present
invention.
1 5 The u n i t c o n t r o l s e c t i o n 26 (winding c o n t r o l s e c t i o n ) adapted
I t o c o n t r o l t h e winding o p e r a t i o n of t h e winding s e c t i o n 13 r e f e r e n c e s
t h e s e t value of t h e winding speed s t o r e d i n t h e winding condition
storage s e c t i o n 51 t o c o n t r o l t h e r o t a t i o n speed of t h e t r a v e r s e drum
1 8 i n a c c o r d a n c e w i t h t h e y a r n u n w i n d i n g p o s i t i o n o f t h e y a r n s u p p l y i n g
10 bobbin 8 ( p o s i t i o n of chess s e c t i o n 8 a ) .
The s e t t i n g of t h e package winding speed according t o t h e yarn
unwinding property of t h e yarn supplying bobbin 8 w i l l be described
i n d e t a i l below. FIG. 4 is a f r o n t view of t h e yarn supplying bobbin
8. A core tube 8b of t h e yarn supplying bobbin 8 has a tapered tube
15 shape i n which t h e diameter of one end (upper end i n t h e f i g u r e ) i n
t h e a x i a l d i r e c t i o n is s m a l l e r t h a n t h e diameter of t h e o t h e r end
(lower end i n t h e f i g u r e ) . A range excluding both ends of t h e core
tube 8b is t h e winding range i n which t h e yarn Y is wound. I f t h e
yarn Y is wound around t h e e n t i r e region of t h e winding range
20 i l l u s t r a t e d i n FIG. 4, t h e yarn supplying bobbin 8 is i n a fully-wound
s t a t e . However, t h e yarn supplying bobbin used i n t h e automatic
winder 1 is not l i m i t e d t o t h e yarn supplying bobbin 8 i n t h e
fully-wound s t a t e , and t h e yarn supplying bobbin 8 i n which t h e yarn
is only wound up t o t h e middle from t h e lower end of t h e winding range
25 may be used.
As i l l u s t r a t e d i n FIG. 4 , thewinding range o f t h e yarn supplying
bobbin 8 is divided t o a f i r s t range A1 and a second range A2. The
f i r s t range A1 is a range l o c a t e d on t h e yarn unwinding s i d e (upper
s i d e ) of t h e winding range. I f t h e chess s e c t i o n 8a is l o c a t e d within
30 t h e f i r s t range A l , t h e chess s e c t i o n 8a is d e t e c t e d by t h e o p t i c a l
sensor 36 (see FIG. 2) t h a t moves up and down ( a x i a l d i r e c t i o n of
t h e yarn supplying bobbin 8) with t h e tube body 30 of t h e unwinding
a s s i s t i n g device 15. The second range A2 is a range located on t h e
opposite s i d e of t h e yarn unwinding s i d e i n t h e winding range, and
i s located f u r t h e r on t h e lower s i d e than t h e d e t e c t i n g p o s i t i o n of
the o p t i c a l sensor 3 6 w h e n t h e t u b e b o d y 30 o f t h e u n w i n d i n g a s s i s t i n g
device 15 is a t t h e lower l i m i t p o s i t i o n . That is, t h e chess s e c t i o n
8a is i n t h e f i r s t range i f t h e chess s e c t i o n 8a can be detected by
t h e o p t i c a l sensor 36, and t h e chess s e c t i o n 8a is i n t h e second range
i f t h e chess s e c t i o n 8a cannot be d e t e c t e d with t h e o p t i c a l sensor
36.
When t h e yarn Y is unwound from t h e yarn supplying bobbin 8,
t h e yarn Y wound i n t h e f i r s t range A1 is f i r s t unwound, and a f t e r
a l l t h e yarn Y i n t h e f i r s t range A1 is unwound, t h e yarn Y i n t h e
second range A2 is unwound. That is, a s t a t e t h e yarn Y is unwound
from t h e f i r s t range A1 is a s t a t e i n which t h e yarn Y of t h e yarn
supplying bobbin 8 is s u f f i c i e n t l y remained, and a s t a t e t h e yarn
Y is unwound from t h e second range A2 is a s t a t e t h e yarn Y is b a r e l y
remained.
When t h e yarn Y is unwound from t h e f i r s t range A1 l o c a t e d on
t h e yarn unwinding s i d e , t h e unwound yarn Y forms a big balloon, so
t h a t t h e yarn y does not rub a g a i n s t t h e yarn supplying bobbin 8 a t
t h e t i m e of unwinding and t h e unwinding r e s i s t a n c e is small. Thus,
abnormality such a s yarn breakage and sloughing is l e s s l i k e l y t o
occur even i f t h e unwinding speed of t h e yarn Y (winding speed of
t h e winding s e c t i o n 13) is increased. I f t h e yarn Y is unwound from
t h e second range A2 on t h e opposite s i d e of t h e yarn unwinding s i d e ,
t h e balloon becomes small, and thus t h e unwound yarn Y e a s i l y rubs
a g a i n s t t h e yarn supplying bobbin 8 and t h e unwinding r e s i s t a n c e
becomes l a r g e . Thus, yarnbreakage and sloughing e a s i l y o c c u r i f t h e
u n w i n d i n g s p e e d o f t h e y a r n Y i s h i g h . Thewinding s p e e d o f t h e w i n d i n g
s e c t i o n 13 when t h e yarn unwinding p o s i t i o n (chess s e c t i o n 8a) is
i n t h e second range A2 is s e t t o a value lower than i n t h e f i r s t range
A1 by t h e d i s p l a y o p e r a t i o n s e c t i o n 50.
Furthermore, a s i l l u s t r a t e d i n FIG. 4 , t h e f i r s t range A1 is
divided i n t o seven i n d i v i d u a l s e t t i n g ranges Ala t o Alg i n t h e a x i a l
d i r e c t i o n o f t h e c o r e t u b e 8 b i n o r d e r f r o m t h e t o p . Thewinding speed
of t h e winding s e c t i o n 13 is i n d i v i d u a l l y set f o r each of t h e seven
ranges Ala t o Alg by t h e d i s p l a y o p e r a t i o n s e c t i o n 50. The u n i t
c o n t r o l s e c t i o n 26 c o n t r o l s t h e winding s e c t i o n 13 such t h a t t h e yarn
is wound a t a predetermined winding speed corresponding t o t h e
i n d i v i d u a l s e t t i n g range i n which t h e yarn unwinding p o s i t i o n is
5 located when t h e yarn Y is unwound a t a c e r t a i n p o s i t i o n of t h e yarn
supplying bobbin 8.
In which one of t h e seven ranges Ala t o Alg of t h e f i r s t range
A1 t h e c u r r e n t yarn unwinding p o s i t i o n ( p o s i t i o n of chess s e c t i o n
8a) is a t can be d e t e c t e d i n t h e following manner. The o p t i c a l sensor
10 36 f o r d e t e c t i n g t h e chess s e c t i o n 8a is a t t a c h e d t o t h e holdingmember
35 (see FIG. 2 ) , and t h e r i s i n g / l o w e r i n g amount from t h e o r i g i n a l
p o s i t i o n o f t h e h o l d i n g m e m b e r 35whenthe chess s e c t i o n 8 a i s detected
by t h e o p t i c a l sensor 36 can be acquired from t h e number of pulses
t r a n s m i t t e d from t h e motor d r i v e r 38 t o t h e tube body d r i v e motor
15 37 including t h e stepping motor. The t r a n s m i t t e d number of pulses
is s t o r e d i n t h e c o u n t s e c t i o n o f t h e m o t o r d r i v e r 3 8 . Theunit c o n t r o l
s e c t i o n 26 acquires t h e lowering amount from t h e o r i g i n a l p o s i t i o n
of t h e holding member 35 ( o p t i c a l sensor 36) from t h e number of pulses
t r a n s m i t t e d from t h e motor d r i v e r 38 t o t h e tube body d r i v e motor
20 37, and d e t e c t s t h e height p o s i t i o n of t h e chess s e c t i o n 8a ( a x i a l
p o s i t i o n of t h e yarn supplying bobbin 8 ) , t h a t is, yarn unwinding
p o s i t i o n therefrom. In t h e present embodiment, t h e o p t i c a l sensor
36 f o r d e t e c t i n g t h e chess s e c t i o n 8a of t h e yarn supplying bobbin
8 c o r r e s p o n d s t o t h e " y a r n d e t e c t i n g s e n s o r " i n t h e p r e s e n t invention.
25 The u n i t c o n t r o l s e c t i o n 26 t h a t d e t e c t s t h e p o s i t i o n of t h e chess
s e c t i o n 8a from t h e number of pulses t r a n s m i t t e d t o t h e tube body
d r i v e motor 37 corresponds t o t h e "unwinding p o s i t i o n d e t e c t i n g
s e c t i o n " inthepresentinventionadaptedtodetecttheposition (yarn
unwinding p o s i t i o n ) of t h e chess s e c t i o n 8a of t h e yarn supplying
30 bobbin 8. In t h e present embodiment, t h e count s e c t i o n is arranged
i n t h e motor d r i v e r , but t h e count s e c t i o n may be arranged i n t h e
u n i t c o n t r o l s e c t i o n 26.
The winding speed of t h e seven ranges Ala t o Alg of t h e f i r s t
range A1 is s e t from t h e d i s p l a y o p e r a t i o n s e c t i o n 50 based on t h e
information related to the yarn unwinding property such as at which
position of the yarn supplying bobbin 8 the yarn Y is unwound when
the abnormality such as yarnbreakage and sloughing easilygenerates.
More specifically, if conditions such as the shape of the yarn
5 supplying bobbin 8 (shape of the core tube 8b and the shape of the
yarn layer), the yarn type, or the winding manner (tight or loose
winding manner) of the yarn in the spinning device when manufacturing
the yarn supplyingbobbin 8 differ, the position ofthe yarn supplying
bobbin 8 the yarn Y is unwound when the abnormality easily generates
10 changes. Thus, the winding speeds of the seven ranges Ala to Alg of
the first range A1 are respectively set based on the various types
of conditions that influence the yarn unwinding property.
Alternatively, the machine control device 51 may automatically set
the winding speeds with respect to the seven ranges Ala to Alg based
15 on such conditions when the operator inputs the various types of
conditions from the display operation section 50.
FIG. 5 illustrates a set example of a winding speed control
corresponding to the yarn unwinding position. This is an example of
when using the yarn supplying bobbin 8 in which abnormality easily
20 generates the most in the range Alf and the range Alg and the
abnormality easily generates next in the range Ala and the range Alb.
In this case, as illustrated in FIG. 5, the winding speed VA of the
range Alf and the range Alg is set to be the smallest, and the winding
speed VB of the range Ala and the range Alb is set to be the next
25 smallest, and the winding speed VC of other ranges Alc to Ale is set
to be the largest. The winding speed of the second range A2 is set
to V2 that is further lower than the VA, which is the lowest speed
in the first range Al.
In the present embodiment described above, the winding speed
30 of the winding section 13 can be set and changed by the display
operation section 50 in accordance with the yarn unwinding property
of the yarn supplying bobbin 8. Thus, the yarn can be wound as high
speed as possible in a range the unwinding abnormality does not
generate, which enhances the productivity.
e More specifically, the winding range (first range Al) in which
the yarn of the yarn supplying bobbin 8 is wound is divided into seven
individual setting ranges Ala to Alg, and the winding speed of the
winding section is set for eachofthe seven individual setting ranges
Alato Alg. Thus, even if the unwinding abnormalityeasilygenerates
at a specific yarn unwinding position in the first range A1 of the
yarn supplying bobbin 8, the winding speed can be lowered when
unwinding the yarn at the yarn unwinding position and the winding
speedcanbeincreasedwhenunwindingthe yarnat other yarnunwinding
positions. Thus, the yarn can be wound as high speed as possible in
the range the unwinding abnormalitydoes not generate, which enhances
the productivity of the package P.
An alternative embodiment in which various changes are made on
the embodiment described above will now be described. The same
reference numerals are denoted on the components having a
configuration similar to the embodiment described above, and the
description will be appropriately omitted.
11 The winding speed for each of the seven ranges Ala to Alg
may be set based on the data of the yarn unwinding position of when
the abnormality actually generated and the winding speed collected
at the time of bobbin use in the past. The setting of the winding
speed based on the past abnormality information will be described
below using an example.
The winding speed Vlx of the winding section 13 with respect
tothe range Alx (x is any of ato g) ofthe first range A1 is calculated
with the equation Vlx = VO + wx x AV, where VO is the reference speed,
wx is the weighting coefficient, and AV is the increasing speed. The
information on the frequency of abnormality generation of when the
yarn Y is unwound from the range Alx, which is collected from the
data at the time of yarn winding in the past, is directly input from
the display operation section 50 by the operator and stored in the
winding condition storage section 51 of the machine control device
4. Themachine control device 4 determinesthe weighting coefficient
wx based on the information on the frequency of the abnormality
Ogeneration. In this aspect, the winding condition storage section
51 of the machine control device 4 corresponds to the "abnormality
i n f o r m a t i o n s t o r a g e s e c t i o n " i n t h e p r e s e n t i n v e n t i o n a d a p t e d t o s t o r e
the information related tothe frequencyofthe unwinding abnormality
on each individual setting range Ala to Alg. Furthermore, in this
aspect, thedisplay operation section 50 ofthemachinecontrol device
4 that determines the weighting coefficient wx corresponds to the
"speed setting section" in the present invention adapted to set the
winding speed with reference to the information related to the
frequency ofthe unwinding abnormality. The unit control section 26
of each winding unit 2 may determine the weighting coefficient wx
with reference to the information related to the frequency of the
unwindingabnormalitystoredinthewindingconditionstorage section
51.
The setting method of the weighting coefficient wx is not
particularly limited, but may be set in the following manner, for
example. FIG. 6 is an explanatory view on determining the weighting
coefficients ofthe seven individual setting ranges. First, initial
values of all weighting coefficients wx are set to 0. In other words,
the initial value of the winding speed of each range = reference speed
vo .
The winding of the package P is started at the initial value,
a n d i n f o r m a t i o n o n t h e p r e s e n c e / a b s e n c e o f g e n e r a t i o n o f t h e u n w i n d i n g
abnormality in the relevant yarn supplying bobbin 8 as well as in
which range the unwinding abnormality is generated if the unwinding
abnormality is generated are acquired every time one yarn supplying
bobbin 8 is used up. The weighting coefficient wx is increased by
one in the range in which the unwinding abnormality does not generate
and the weighting coefficient wx is reduced by one in the range in
which the unwinding abnormality is generated in the seven individual
setting ranges Ala to Alg. In the example of FIG. 6, the abnormality
is generated once in the ranges Ala and Alb and the abnormality is
generated twice in the ranges Alf, Alg while five yarn supplying
bobbins are used up. This is repeated to acquire the limit speed at
*which the unwinding abnormality does not generate for each of the
seven ranges Ala to Alg.
In the present embodiment, the embodiment in which the winding
of the package P is started, the information on the presence/absence
~ 5 of generation of the unwinding abnormality in the relevant yarn
supplyingbobbin 8 as well as inwhich range the unwindingabnormality
is generated if the unwinding abnormality is generated are acquired
every time one yarn supplying bobbin 8 is used up, and the weighting
coefficient in the range in which the unwinding abnormality is
10 generated is changed to change the setting speed of the individual
setting range has been described, but this is not the sole case. The
information on the presence/absence of generation of the unwinding
abnormality in the relevant yarn supplying bobbin 8 detected in the
abovemannerandinwhichrangetheunwindingabnormalityis generated
15 if the unwinding abnormality is generated are acquired, and the
informationmaybe usedtoperformmaintenance on the spinningdevice.
Iftheunwindingabnormalityis generated, the informationon inwhich
range the unwinding abnormality is generated is acquired, so that
the cause the yarn supplying bobbin 8, in which the unwinding
20 abnormality generates, is spun may be estimated or specified in the
step of spinning one yarn supplying bobbin 8 in the spinning device.
The cause the yarn supplying bobbin 8, in which the unwinding
abnormality generates, is spun includes stopping of the spinning
device due to blackout, end of lifespan of the consumable articles,
25 and the like.
If a tray transporting device adapted to transport the yarn
supplying bobbin 8 from the spinning device to the winding unit 2
with the transportation tray is arranged, the storage section is
attached to the transportation tray, and the information on the
30 spinning unit that spun the yarn supplying bobbin is recorded in such
storage section sothat the spinningunitthat spun the yarn supplying
bobbin 8 in which the unwinding abnormality is generated can be
specified. Furthermore, since in which range of the one yarn
supplyingbobbin 8 the unwinding abnormalityis generatedis acquired
a s the information of the unwinding abnormality, the spinning step
that became the cause of generation of the unwinding abnormality
(spinning length from the start of spinning of the yarn supplying
bobbin tothe area where the yarn ofthe unwinding abnormalityportion
is spun) can be specified when the spinning unit that spun the yarn
supplying bobbin 8, in which the unwinding abnormality is generated,
spins the yarn supplying bobbin 8. Furthermore, the unit control
section 26 includes a notifying section 50a adapted to notify the
specification result when specification of the spinning unit that
spun the yarn supplying bobbin 8 in which the unwinding abnormality
is generated and the step that became the cause of occurrence of
drawback is carried out.
2) In the embodiment described above, the first range A1 of the
winding range is divided into a plurality of (seven) individual
setting ranges, and then the winding speed is set for each of the
plurality of individual setting ranges. In other words, a plurality
of discrete winding speeds is set with respect to the first range
Al. On the contrary, a continuous function expression between the
yarnunwindingpositionofthe yarn supplyingbobbin 8 andthewinding
speed of the winding section 13 may be obtained, and the winding speed
may be continuously calculated from the detected yarn unwinding
position in accordance with the function expression.
31 In the embodiment described above, the chess section 8a is
not detected with the optical sensor 36 in the second range A2, but
if the remaining amount of the yarn can be detected even in the second
range A2, the winding speed can be controlled in accordance with the
yarn unwinding position for the second range A2 as well, similar to
the first range Al. In order to detect the yarn unwinding position
in the second range A2, for example, image analysis by a camera may
be used.
Alternatively, a pluralityof optical sensors 36maybe fixedly
installedinalineverticallyatthe side ofthe yarnsupplyingbobbin
8, and the position of the chess section 8a may be detected with the
plurality of optical sensors 36. In this variant, the chess section
8a can be detected not only in the second range A2 but in the entire
I winding range including the first range A1 by vertically arranging
I the plurality of optical sensors 36 over the entire winding range
including the first range Al.
5 43 The detection of the yarn unwinding position of the yarn
supplying bobbin 8 can be carried out without using sensors such as
the optical sensor 36. For example, the yarn unwinding position of
the yarn supplyingbobbin 8maybedetected (presumed) fromthewinding
time of the package P by the winding section 13. The yarn unwinding
10 position of the yarn supplying bobbin 8 may be detected (presumed)
from the length of yarn wound into the package P. The length of the
yarn wound into the package P can be detected from the number of
rotations of the traverse drum 18, for example. Alternatively,
detection may be directly made by a yarn length detecting sensor
15 arranged on a yarn travelling path.
51 As illustrated in FIG. 7, a yarn accumulating roller 60 (yarn
I accumulating device) adapted to wind the yarn unwound from the yarn
I supplying bobbin and temporarily accumulate the yarn may be arranged
1 between the yarn supplying section 11 and the winding section 13
20 (package forming section). The winding section 13 winds the yarn Y
unwound from the yarn accumulating roller 60 around the winding tube
17 to form the package P. With such a configuration, the yarn
accumulated in the yarn accumulating roller 60 can be supplied to
the winding section 13 even under a situation where the yarn Y is
25 not supplied from the yarn supplying bobbin 8 such as when replacing
the yarn supplying bobbin 8, when yarn breakage occurs, and the like.
The interruption of the winding operation of the winding section 13
is thus suppressed as much as possible, and the productivity of the
package P enhances.
30 When applying the present invention on the winding unit 2
including the yarn accumulating roller 60, the winding speed of the
yarn accumulating roller 60 is set in accordance with the yarn
unwinding position of the yarn supplying bobbin 8. That is, the
unwinding speed of the yarn Y from the yarn supplying bobbin 8 is
controlled by controlling the winding speed of the yarn accumulating
roller 6 0 l o c a t e d b e t w e e n t h e y a r n s u p p l y i n g s e c t i o n 1 1 a n d t h e w i n d i n g
section 13. In this case, the lowering in the quality of the package
P is suppressed compared to when controlling the winding speed of
5 the winding section 13 that forms the package P.
61 In the embodiment described above, the fact that the yarn
unwinding position where the unwinding abnormality tends to easily
generate differs among the yarn supplying bobbins 8 is seen as a
problem, and hence the winding speed of the winding section 13 is
10 set in accordance with the yarn unwinding position of the yarn
supplying bobbin 8. However, the winding speed may be set according
to the difference in other yarn unwinding properties. For example,
in the spinning device, the unwinding abnormality such as yarn
breakage and sloughing tends to easily generate overall in the yarn
15 supplying bobbin 8 in which the yarn is loosely wound at low tension,
compared to the yarn supplying bobbin 8 in which the yarn is tightly
wound at a defined tension. Thus, if the yarn of the yarn supplying
bobbin8islooselywound, thewinding speedis suppressedlowoverall.
The tube body 30 arranged in the unwinding assisting device 16
20 of the present invention also includes a tube body with a slit, in
which a slit for passing the yarn is formed at one portion.
The yarn is unwound to one side in the axial direction from the
yarn supplying bobbin, and the yarn is wound by the winding section.
In the present invention, the winding range in which the yarn is wound
25 in the yarn supplyingbobbinis dividedinto apluralityofindividual
setting ranges, and the winding speed of the winding section is set
for each of the plurality of individual setting ranges. Therefore,
for example, the winding speed can be set in accordance with the yarn
unwinding property such that the yarn is unwound at a high winding
30 speed at the portion where the yarn is wound at a defined strength,
and the yarn is unwound at a low winding speed at a portion where
the yarn is wound looser than the defined strength so that the
unwinding abnormality such as sloughing does not generate. That is,
if the unwinding abnormality easily generates at a specific yarn
u n w i n d i n g p o s i t i o n within t h e winding range of t h e yarn supplying
bobbin, t h e winding speed is s e t t o be slow when unwinding a t such
a s p e c i f i c yarn unwinding p o s i t i o n and t h e winding speed is s e t f a s t
when unwinding a t o t h e r p o s i t i o n s . Thus, t h e yarn can be wound as
high speed a s p o s s i b l e i n a range t h e unwinding abnormality does not
generate, which enhances t h e p r o d u c t i v i t y .
A yarn winding device of a second aspect according t o t h e f i r s t
aspect f u r t h e r includes a yarn d e t e c t i n g sensor adapted t o d e t e c t
an end on t h e yarn unwinding s i d e of a yarn l a y e r wound around t h e
yarn supplying bobbin; an unwinding a s s i s t i n g device, which includes
a t u b e body and which is adapted t o a s s i s t t h e unwinding of t h e yarn
while moving i n t h e a x i a l d i r e c t i o n of t h e yarn supplying bobbin
accompanyingthe advancement o f t h e unwinding o f t h e yarn; a s t e p p i n g
motor adapted t o move t h e tube body toward a s i d e opposite t o t h e
yarn unwinding s i d e along t h e a x i a l d i r e c t i o n of t h e yarn supplying
bobbin i n accordance with t h e d e t e c t i o n of t h e yarn by t h e yarn
d e t e c t i n g s e n s o r ; andacountsectionadaptedtocountnumberofpulses
t r a n s m i t t e d t o t h e steppingmotor t o d r i v e t h e steppingmotor; wherein
t h e unwinding p o s i t i o n d e t e c t i n g s e c t i o n d e t e c t s t h e c u r r e n t yarn
unwinding p o s i t i o n from t h e number of pulses counted by t h e count
s e c t i o n when t h e tube body is moved.
As t h e yarn is unwound from t h e yarn supplying bobbin, t h e
positionoftheendontheyarnunwindingsideoftheyarnlayerlowers.
The tube body of t h e unwinding a s s i s t i n g device is moved i n t h e a x i a l
d i r e c t i o n of t h e yarn supplying bobbin accompanying t h e advancement
o f t h e u n w i n d i n g o f t h e yarn 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 t o r e g u l a t e
t h e expansion ( b a l l o o n ) of a yarn Y being unwound and t o s t a b i l i z e
t h e unwinding t e n s i o n . More s p e c i f i c a l l y , t h e tube body is moved
toward t h e s i d e opposite t o t h e yarn unwinding s i d e along t h e a x i a l
d i r e c t i o n of t h e yarn supplying bobbin by t h e stepping motor i n
a c c o r d a n c e w i t h t h e d e t e c t i o n o f t h e y a r n b y t h e y a r n d e t e c t i n g s e n s o r .
In t h i s case, where t h e c u r r e n t yarn unwinding p o s i t i o n is a t , t h a t
is, a t which p o s i t i o n i n t h e a x i a l d i r e c t i o n of t h e yarn supplying
bobbin t h e end on t h e yarn unwinding s i d e of t h e yarn l a y e r is a t
@ can be detected from the movement amount of the tube body. The
movement amount ofthe tube body can be graspedby counting the number
of pulses transmitted to the stepping motor when the tube body is
moved. Therefore, the yarn unwinding position ofthe yarn supplying
I
I 5 bobbin can be detected. ~
Ina yarnwinding device of athirdaspectaccordingtothe first
or secondaspect, the speed setting section includes an input section
adapted to input a set value of the winding speed with respect to
each of the plurality of individual setting ranges.
10 According tothe present invention, the operator may input from
the input section to set the winding speed for each of the plurality
of individual setting ranges of the yarn supplying bobbin.
A yarn winding device of a fourth aspect according to the first
or second aspect further includes an abnormality information storage
15 section adapted to store information related to frequency of an
unwinding abnormality generated when the yarn is unwound in each of
thepluralityofindividualsetting ranges; wherein the speed setting
section references the information related to the frequency of the
unwinding abnormality stored in the abnormality information storage
20 section to set the winding speed for each of the plurality of
individual setting ranges.
According to the present invention, the winding speed for each
of the plurality of individual setting ranges is set from the
information related to the frequency of the unwinding abnormality
25 at the time of yarn winding in the past for each of the plurality
of individual setting ranges. Therefore, the winding speed can be
appropriately set according to the generation tendency of the
unwinding abnormality such as at which yarn unwinding position the
unwinding abnormality easily generates.
30 A yarn winding device of a fifth aspect according to any one
of first to fourth aspects further includes a package forming section
adaptedtowindthe yarnunwound fromthe yarn supplyingbobbin around
a winding tube to form a package; wherein the winding section is a
yarn accumulating device arrangedbetweenthe yarn supplying section
I forming section winds the yarn unwound from the yarn accumulating
device around the winding tube.
5 The yarn accumulating device is arranged between the yarn
supplying section and the package forming section to temporarily
accumulate the yarn unwound fromthe yarn supplying bobbin, so that
the yarn accumulated in the yarn accumulating device can be supplied
to the package forming section even under a situation where the yarn
10 is not supplied from the yarn supplying bobbin such as when replacing
the yarn supplying bobbin, when yarn breakage occurs, and the like.
The interruption of the winding operation of the package forming
section is thus suppressed as much as possible, and the productivity
of the package enhances. According to the present invention, in the
15 yarn winding device including the yarn accumulating device, the
winding speedofthe yarn accumulatingdeviceis controlledaccording
to the yarn unwinding position of the yarn supplying bobbin. That
is, the winding speed of the yarn accumulating device located between
the yarn supplying section and the package forming section is
20 controlled to control the yarn unwinding speed of the yarn from the
yarn supplying bobbin, so that the lowering in the quality of the
package is suppressed compared to when controlling the winding speed
of the package forming section.
Ayarn winding method of a sixth aspect relates to a yarn winding
25 method for winding a yarn unwound from a yarn supplying bobbin, the
method including the steps of dividing a winding range in which the
yarn is wound in the yarn supplying bobbin into a plurality of
individual setting ranges and setting a winding speed corresponding
to a yarn unwinding property for each of the plurality of individual
30 setting ranges; and winding the yarn unwound from the yarn supplying
bobbin at the set winding speed.
In the present invention, thewinding speedis set inaccordance
with the yarn unwinding property of the individual range, for each
of the plurality of individual setting ranges of the winding range
()of the yarn supplying bobbin. Thus, the yarn can be wound as high
speed as possible in a range that the unwinding abnormality does not
generate, which enhances the productivity.
A yarn winding device of a seventh aspect includes a yarn
supplying section adapted to hold a yarn supplying bobbin; a winding
sectionadaptedtowinda yarnunwoundtoone side inanaxial direction
from the yarn supplying bobbin; a winding control section adapted
to control the winding section; an unwinding position detecting
section adapted to detect a yarn unwinding position of the yarn
supplying bobbin; and an abnormality information storage section
adapted to store information related to an unwinding abnormality
includingthe yarn unwinding position when the unwinding abnormality
of the yarn is generated; wherein the winding control section
specifies a drawbackof a spinning device that spun the yarn supplying
bobbin, in which the unwinding abnormality generates, from the
abnormalityinformationstoredintheabnormalityinformation storage
section.
In the present invention, since the spinning device that spun
theyarnsupplyingbobbininwhichtheunwindingabnormalitygenerates
can be specified in the yarn winding device, the drawbacks can be
quickly responded.
A yarn winding device of an eighth aspect further includes a
notifying section adapted to notify a specification result when the
winding control section specifiesthe drawbackofthe spinningdevice
that spun the yarnsupplyingbobbininwhichtheunwindingabnormality
generates.
In the present invention, since the specification result ofthe
drawback of the spinning device is notified by the notifying section,
the operator can be quickly notified of the drawback of the spinning
device.
A yarn winding system of a ninth aspect including the yarn
winding device according to the seventh or eighth aspect, a spinning
device including a plurality of spinning units adapted to spin the
yarn supplying bobbin; and a tray transporting device adapted to
t r a n s p o r t t h e yarn supplying bobbin between t h e yarn winding device
a n d t h e s p i n n i n g d e v i c e ; whereinthetraytransportingdeviceincludes
a t r a n s p o r t a t i o n t r a y adapted t o mount and t r a n s p o r t t h e yarn
supplyingbobbin, anda s t o r a g e s e c t i o n a r r a n g e d i n t h e t r a n s p o r t a t i o n
5 t r a y ; t h e s t o r a g e s e c t i o n s t o r e s information r e l a t e d t o t h e spinning
u n i t t h a t s p u n t h e yarn supplyingbobbinmountedonthetransportation
~ t r a y ; and t h e winding c o n t r o l s e c t i o n s p e c i f i e s t h e spinning u n i t
t h a t spun t h e yarn supplying bobbin, i n which t h e unwinding
abnormality generates, and s p e c i f i e s a spinning s t e p t h a t became t h e
10 cause o f generation o f t h e unwinding a b n o r m a l i t y i n t h e spinning u n i t
f r o m t h e i n f o r m a t i o n s t o r e d i n t h e s t o r a g e s e c t i o n a n d t h e abnormality
information s t o r e d i n t h e abnormality information s t o r a g e s e c t i o n .
In t h e present invention, s i n c e t h e spinning u n i t t h a t spun t h e
yarn supplying bobbin, i n which t h e unwinding abnormality generates,
15 can be s p e c i f i e d , and t h e spinning s t e p i n which t h e unwinding
abnormality is generated i n t h e r e l e v a n t spinning u n i t can be
s p e c i f i e d , t h e operator can graspmore d e t a i l e d drawback information
and t h e maintenance performance enhances.

W E CLAIMS
1. A yarn winding device comprising:
a yarn supplying s e c t i o n adapted t o hold a yarn supplying
5 bobbin ;
a winding s e c t i o n adapted t o wind a yarn unwound t o one s i d e
i n an a x i a l d i r e c t i o n from t h e yarn supplying bobbin ;
a speed s e t t i n g s e c t i o n adapted t o set a winding speed of t h e
winding s e c t i o n ; and
10 awindingcontrolsectionadaptedto c o n t r o l thewinding s e c t i o n
based on t h e winding speed set by t h e speed s e t t i n g s e c t i o n ;
c h a r a c t e r i z e d i n t h a t :
t h e winding c o n t r o l s e c t i o n f u n c t i o n s a s an unwinding p o s i t i o n
d e t e c t i n g s e c t i o n adapted t o d e t e c t a yarn unwinding p o s i t i o n of t h e
15 yarn supplying bobbin ;
t h e speed s e t t i n g s e c t i o n d i v i d e s a winding range i n which t h e
yarn is woundinthe yarn supplyingbobbintoapluralityofindividual
s e t t i n g ranges (Ala t o Alg) and sets t h e winding speed of t h e winding
s e c t i o n f o r each of t h e p l u r a l i t y of i n d i v i d u a l s e t t i n g ranges (Ala
20 t o Alg); and
thewindingcontrolsectioncontrolsthewindingsectiontowind
t h e yarn a t t h e winding speed set with r e s p e c t t o t h e range i n which
t h e yarn unwinding p o s i t i o n is l o c a t e d i n accordance with i n which
range of t h e p l u r a l i t y of i n d i v i d u a l s e t t i n g ranges (Ala t o Alg) t h e
25 d e t e c t e d yarn unwinding p o s i t i o n is l o c a t e d .
2. The yarn winding device according t o claim 1, f u r t h e r
comprising:
a yarn d e t e c t i n g sensor adapted t o d e t e c t an end on t h e yarn
30 unwindingside o f a yarn layerwoundaroundthe yarn supplyingbobbin;
an unwinding a s s i s t i n g device, which includes a t u b e body and which
is adapted t o a s s i s t t h e unwinding of t h e yarn while moving i n t h e
a x i a l d i r e c t i o n of t h e yarn supplying bobbin accompanying t h e
advancement of t h e unwinding of t h e yarn;
a stepping motor adapted to move the tube body toward a side
opposite to the yarn unwinding side along the axial direction of the
yarn supplying bobbin in accordance with the detection of the yarn
by the yarn detecting sensor ; and
5 a count section adapted to count number of pulses transmitted
to the stepping motor to drive the stepping motor ; characterized
in that the unwinding position detecting section detects the current
yarnunwindingposition fromthe number of pulses countedbythe count
section when the tube body is moved.
10
3. The yarn winding device according to claim 1 or 2,
characterized in that the speed setting section includes an input
section adapted to input a set value of the winding speed with respect
to each of the plurality of individual setting ranges (Ala to Alg) .
15
4. The yarn winding device according to claim 1 or 2, further
comprising an abnormality information storage section adapted to
store information related to frequency of an unwinding abnormality
generated when the yarn is unwound in each of the plurality of
20 individual setting ranges (Ala to Alg); characterized in that
the speed setting section references the information related
to the frequency of the unwinding abnormality stored in the
abnormality information storage section to set the winding speed for
each of the plurality of individual setting ranges (Ala to Alg).
25
5. The yarn winding device according to any one of claims 1
to 4, further comprising a package forming section adapted to wind
the yarn unwound from the yarn supplying bobbin around a winding tube
to form a package; characterized in that
30 the winding section is a yarn accumulating device arranged
between the yarn supplying section and the package forming section
to wind and temporarily accumulate the yarn unwound from the yarn
supplying bobbin ; and
the package forming sectionwinds the yarnunwound fromthe yarn
@accumulating device around the winding tube.
6 . A yarn winding method for winding a yarn unwound from a yarn
supplying bobbin, the method comprising the steps of:
5 dividing a winding range in which the yarn is wound in the yarn
supplying bobbin into a plurality of individual setting ranges (Ala
to Alg) and setting a winding speed corresponding to a yarn unwinding
property for each of the plurality of individual setting ranges (Ala
to Alg) ; and
10 winding the yarn unwound from the yarn supplying bobbin at the
set winding speed.
7. A yarn winding device comprising:
a yarn supplying section adapted to hold a yarn supplying
15 bobbin ;
a winding section adapted to wind a yarn unwound to one side
in an axial direction from the yarn supplying bobbin ;
a winding control section adapted to control the winding
section ;
20 anunwindingpositiondetecting sectionadaptedtodetecta yarn
unwinding position of the yarn supplying bobbin ; and
an abnormality information storage section adapted to store
information related to an unwinding abnormality including the yarn
unwinding position when the unwinding abnormality of the yarn is
25 generated; characterized in that
the winding control section specifies a drawback of a spinning
device that spun the yarn supplying bobbin , in which the unwinding
abnormality generates, from the abnormality information stored in
the abnormality information storage section.
30
8. The yarn winding device according to claim 7, further
comprising a notifying section adapted to notify a specification
result when the winding control section specifies the drawback of
the spinning device that spun the yarn supplying bobbin in which the
unwinding abnormality generates.
9. A yarn winding system comprising:
the yarn winding device according to claim 7 or 8;
5 a spinning device including a plurality of spinning units
adapted to spin the yarn supplying bobbin ; and
a tray transporting device adapted to transport the yarn
supplying bobbin between the yarn winding device and the spinning
device; characterized in that
10 the tray transporting device includes a transportation tray
adapted to mount and transport the yarn supplying bobbin , and a
storage section arranged in the transportation tray;
the storage section stores information related to the spinning
unitthatspuntheyarnsupplyingbobbinmountedonthetransportation
15 tray; and
the winding control section specifies the spinning unit that
spun the yarn supplying bobbin , in which the unwinding abnormality
generates, and specifies a spinning step that became the cause of
generation of the unwinding abnormality in the spinning unit from
20 the information stored in the storage section and the abnormality
information stored in the abnormality information storage section.
10. A yarn winding device, substantially as herein described with
reference to accompanying drawings and examples.
11. A yarn winding method for winding a yarn unwound from a yarn
supplying bobbin, substantially as herein described with reference
to accompanying drawings and examples.