YARN SPLICING DEVICE, WINDING UNIT, TEXTILE MACHINE
AND YARN SPLICING METHOD
BACKGROUND OF THE INVENTION
5 1. Field of the Invention
The present invention relates to a yarn splicing
device, a winding unit, a textile machine and a yarn
splicing method.
10 2. Description of the Related Art
Conventionally, there is knownayarnsplicingdevice
disclosed in Japanese Patent Application Laid-open No.
6-78157 relating to a yarn splicing device for splicing a
first yarn end and a second yarn end together. Such a yarn
15 splicingdeviceincludesa first untwisting sectionadapted
to untwist the first yarn end by introdl-1-cingt he first yarn
end thereto and applying airflow on the first yarn end, a
second untwisting section adapted to untwist the second
yarn end by introducing the second yarn end thereto and
20 applyingairflowonthe second yarn end, anda yarn splicing
section adapted to splice the untwisted first yarn end and
second yarn end together.
SUMMARY OF THE INVENTION
25 In the conventional yarn splicing device described
above, a valve is provided in each of conduit pipes through
which compressed air is respectively guided to the first
untwisting section and the second untwisting section.
Normally in this case, the valves are simultaneously
30 controlled, and the compressed air is injected to the first
yarn end in the first untwisting section and to the second
yarn end i n t h e second untwisting s e c t i o n . Therefore, i n
a case where t w i s t i n g s t a t e s of t h e f i r s t yarn end and t h e
second yarn end d i f f e r from each o t h e r , f o r example, s i n c e
untwisting s t a t e s of t h e f i r s t yarn end and t h e second yarn
5 end d i f f e r from each o t h e r , f a v o r a b l e yarn s p l i c i n g of t h e
f i r s t yarn end and t h e second yarn end may be d i f f i c u l t .
The present invention ismade i n c o n s i d e r a t i o n o f t h e
above-describedcircumstances, a n d i t s o b j e c t is t o p r o v i d e
a yarn s p l i c i n g d e v i c e capable o f f a v o r a b l y p e r f o r m i n g y a r n
10 s p l i c i n g of t h e f i r s t yarn end and t h e second yarn end, a
winding u n i t , a t e x t i l e machine and a yarn s p l i c i n g m e t h o d .
To solve t h e above-described problems, a yarn
splicingdeviceaccordingtothepresent i n v e n t i o n is a yarn
s p l i c i n g device adapted t o s p l i c e a f i r s t yarn end and a
15 second yarn end t o g e t h e r , and i n c l u d e s a f i r s t u n t w i s t i n g
sectionadaptedtountwistthe f i r s t yarnendby i n t r o d u c i n g
t h e f i r s t y a r n e n d t h e r e t o a n d a p p l y i n g a i r f l o w on t h e f i r s t
yarn end, a second untwisting s e c t i o n adapted t o untwist
t h e second yarn end by i n t r o d u c i n g t h e second yarn end
20 t h e r e t o and applying a i r f l o w on t h e second yarn end, a yarn
s p l i c i n g s e c t i o n adapted t o s p l i c e t h e f i r s t yarn end and
t h e second yarn end t o g e t h e r t h a t have been r e s p e c t i v e l y
untwisted i n t h e f i r s t u n t w i s t i n g s e c t i o n and t h e second
u n t w i s t i n g s e c t i o n , and an u n t w i s t i n g a d j u s t i n g s e c t i o n
25 adapted t o a d j u s t u n t w i s t i n g s t a t e s of t h e f i r s t yarn end
and t h e second yarn end t h a t a r e r e s p e c t i v e l y untwisted i n
t h e f i r s t u n t w i s t i n g s e c t i o n and t h e second untwisting
s e c t i o n . The u n t w i s t i n g a d j u s t i n g s e c t i o n is adapted t o
cause a c t i o n of a i r f l o w on t h e f i r s t yarn end i n the f i r s t
30 u n t w i s t i n g s e c t i o n and a c t i o n of a i r f l o w on t h e second yarn
end i n t h e second u n t w i s t i n g s e c t i o n t o d i f f e r from each
other such that the untwisting states of the first yarn end
and the second yarn end are equal to each other.
BRIEF DESCRIPTION OF THE DRAWINGS
5 FIG. 1 is a front view of a winding unit according
to a first embodiment;
FIG. 2 is a front view of a yarn splicing device of
FIG. 1;
FIG. 3 is a configuration diagram illustrating main
10 sections of the yarn splicing device of FIG. 1;
FIG. 4 is a configuration diagram illustrating main
sections of a yarn splicing device according to a second
embodiment;
FIG. 5 is a configuration diagram illustrating main
15 sections of a yarn splicing device according to a third
embodiment; and
FIG. 6 is a schematic cross-sectional view
illustrating a flow ratio changing section of the yarn
splicing device of FIG. 5.
20
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Apreferred embodiment ofthe present invention will
be hereinafter described in detail with reference to the
accompanying drawings. The same reference numerals are
25 denoted on the same or corresponding portions throughout
the drawings, and redundant description will be omitted.
[A configuration of a winding unit]
First, a first embodiment of the present invention
willbedescribed. As illustratedin FIG. 1, awindingunit
30 1 is adapted to wind a yarn Y from a yarn supplying bobbin
B around a package P. The yarn supplying bobbin B is formed
b y a spinningmachine a t a p r e v i o u s s t a g e and is t r a n s p o r t e d
from t h e spinning machine i n a s t a t e of being s e t on a t r a y ,
f o r example. By arranging a p l u r a l i t y o f t h e w i n d i n g u n i t s
1 s i d e by s i d e , an automatic winder serving as a t e x t i l e
5 machine is formed.
The winding u n i t 1 includes a bobbin supporting
s e c t i o n (yarn supplying s e c t i o n ) 2, a yarn unwinding
a s s i s t i n g device 3, a p r e c l e a r e r 4 , a g a t e - t y p e t e n s e r 5,
a tension sensor 6, a lower-yarn catching device 7, a yarn
10 s p l i c i n g device 10, a c u t t e r 9, a yarn c l e a r e r 11, an
upper-yarn catching device 12 and a winding s e c t i o n 13
arranged i n t h i s order from upstream (a lower s i d e i n t h i s
c a s e ) along a y a r n path, which is a t r a v e l l i n g path of t h e
yarn Y. E a c h o f t h e components i s m o u n t e d t o amachinebase
15 8.
The bobbin supplying s e c t i o n 2 is adapted t o suppert
t h e yarn supplying bobbin B upright and t o supply t h e yarn
Y . The yarn unwinding a s s i s t i n g device 3 is adapted t o
c o n t r o l a balloon of t h e yarn Y unwound from t h e yarn
20 supplyingbobbin B w i t h a t u b u l a r m e m b e r a r r a n g e d a b o v e t h e
yarn supplyingbobbin B. The gate-type t e n s o r 5 is adapted
t o apply a predetermined t e n s i o n on t h e t r a v e l l i n g yarn Y
by holding t h e yarn Y i n a zig-zag manner w i t h a p a i r of
g a t e s formed of a comb t e e t h f i x e d g a t e and a comb t e e t h
25 movable g a t e . The t e n s i o n sensor 6 is adapted t o measure
t h e t e n s i o n on t h e yarn Y a p p l i e d by t h e gate-type t e n s o r
5.
T h e p r e c l e a r e r 4 is a d a p t e d t o p r e - r e g u l a t e a p a s s a g e
of a yarn d e f e c t , which is g r e a t e r than a defined value,
30 with a p a i r of r e g u l a t i n g members arranged i n t h e yarn path
therebetween. The yarn c l e a r e r 11 is adapted t o d e t e c t a
yarn d e f e c t such a s a s l u b during winding of t h e yarn Y .
The c u t t e r 9 i s a d a p t e d t o c u t t h e y a r n y w h e n t h e y a r n d e f e c t
is detected by t h e yarn c l e a r e r 11. The yarn s p l i c i n g
device 10 is adapted t o s p l i c e a yarn end (one yarn end)
5 on a s i d e of t h e package P and a yarn end ( t h e o t h e r yarn
end) on a s i d e of t h e yarn supplying bobbin B a t t h e time
of c u t t i n g t h e yarn Y by t h e c u t t e r 9 o r a t t h e time of yarn
breakage of t h e yarn Y.
The lower-yarn catching device 7 is mounted t o t h e
10 machine base 8 i n a swingable manner with an a x i a l l i n e oc
as a c e n t e r , anda suctionmouth 7 a i s p r o v i d e d a t a swinging
end t h e r e o f . The s u c t i o n mouth 7a is swung between a p a r t
above t h e yarn s p l i c i n g device 10 and a p a r t below t h e
p r e c l e a r e r 4 . A t t h e time of c u t t i n g t h e yarn Y by t h e
15 c u t t e r 9 o r a t t h e time o f yarn breakage of t h e yarn Y, t h e
lower-yarncatchingdevice 7 is a d a p t e d t o swingthe s u c t i o n
mouth 7a t o t h e p a r t below t h e p r e c l e a r e r 4 t o suck a yarn
end from a lower s i d e with t h e s u c t i o n mouth 7a, and then
t o swing t h e s u c t i o n mouth 7a t o t h e p a r t above t h e yarn
20 s p l i c i n g device 10 t o d e l i v e r t h e yarn end from t h e lower
s i d e t o t h e yarn s p l i c i n g device 10.
The upper-yarn catching device 12 is mounted t o t h e
machine base 8 i n a swingable manner with an a x i a l l i n e P
a s a c e n t e r , a n d a s u c t i o n m o u t h 1 2 a i s p r o v i d e d a t a s w i n g i n g
25 end t h e r e o f . The s u c t i o n mouth 12a is swung between a p a r t
below t h e yarn s p l i c i n g device 10 and t h e winding s e c t i o n
13. A t t h e time of c u t t i n g t h e yarn Y by t h e c u t t e r 9 or
a t t h e time of yarn breakage of t h e yarn Y, t h e upper-yarn
catching device 12 is adapted t o swing t h e suction mouth
30 12a t o a s i d e of t h e winding s e c t i o n 13 t o suck a yarn end
from an upper s i d e , and then t o swing t h e s u c t i o n mouth 12a
to the part below the yarn splicing device 10 to deliver
the yarn end fromthe upper side tothe yarn splicing device
10.
The winding section 13 is adapted to wind the yarn
5 Y unwound from the yarn supplying bobbin B around the
package P to form a fully-wound package P. The winding
section 13 includes a winding drum 14 with a drum groove
14a formed thereon and a cradle 15 adapted to support the
package P in a rotatable manner. The cradle 15 causes a
10 surface of the package P to make contact with a surface of
the winding drum14 under an appropriate contact pressure.
By rotating the package P together with the winding drum
14 being rotationally driven with a motor, the winding
section 13 winds the yarn Y around the package P while
15 traversing the yarn Y in a predetermined width.
Themachinebase 8 is providedwith a control section
16, an input section 17 and a display section 18. The
control section 16 is adapted to control each component of
the winding unit 1. The input section 17 serves as, for
20 example, an operation button or the like, and is used when
an operator sets various values to the control section 16,
or the like. The display section 18 is adapted to display
an operational status or the like of the winding unit 1.
The control section 16transmits/receives various types of
25 information relating to a winding operation to/from an
upper control section provided in the automatic winder.
The upper control section is adapted to control an overall
automatic winder by controlling the control sections 16
each provided in the winding units 1.
30 [A configuration of a yarn splicing device]
Next, a configuration of the above-described yarn
splicing device 10 will be described. In the following
description, a side of the package P and a side of the yarn
supplying bobbin B respectively indicate an upper side and
a lower side for convenience sake. Similarly, a side of
5 the yarn path with respect to the yarn splicing device 10
and an opposite side of the yarn path side respectively
indicate a front side and a back side.
As illustrated in FIG. 2, the yarn splicing device
10 includes a first untwisting section 40A, a second
10 untwistingsection40B, a yarn splicingsection50 arranged
at a front side of the first untwisting section 40A and the
seconduntwistingsection 40B, apairofyarndrawinglevers
81adaptedto swing to sandwich the first untwisting section
40A and the second untwisting section 40B, and a pair of
15 twist stopping levers 82 adapted to swing to sandwich the
. .
yarn splicing section 50. The yarn spllclng device 10 is
mounted to the machine base 8 via a frame body adapted to
support each component of the yarn splicing device 10.
Above the second untwisting section 40B andbelow the
20 first untwisting section 40A, a first guide plate (first
regulating section) 21 and a second guide plate (second
regulating section) 22 are respectively arranged so as to
face each other with the yarn splicing section 50
therebetween. A guide groove 21a and a guide groove 21b
25 are formed overthe first guide plate 21, and a guide groove
22a and a guide groove 22b are formed over the second guide
plate 22. The guide groove 21a of the first guide plate
21 faces the guide groove 22a of the second guide plate 22
in an upper-lower direction, and the guide groove 21b of
30 the first guide plate 21 faces the guide groove 22b of the
second guide plate 22 in the upper-lower direction.
A yarn end YA from the upper side (that is, a first
yarn end, which is a yarn end YA from the upper side guided
by the upper-yarn catching device 12) drawn by one of the
yarn drawing levers 81 is introduced to the guide groove
5 21a and the guide groove 22a facing each other in the
upper-lower direction. On the other hand, a yarn end YB
from the lower side (that is, a second yarn end, which is
a yarn end YB from the lower side guided by the lower-yarn
catching device 7) drawn by the other of the yarn drawing
10 levers 81isintroducedtothe guide groove 21bandtheguide
groove 22b facing each other in the upper-lower direction.
A first gripping section 60A is provided above the
first guide plate 21, and a first cutting section 70A is
provided above the second guide plate 22. The first
15 gripping section 60Ais adaptedto grip the yarnendYA from
the upper side, which has been introduced to the guide
groove 21a, at a first gripping position 69A. The first
cutting section 70A is adapted to cut the yarn end YA from
the upper side, which has been introduced to the guide
20 groove 22a, at a first cutting position 79A under a state
where the yarn end YA from the upper side is gripped by the
first gripping section 60A.
A second gripping section 60B is provided below the
second guide plate 22, and a second cutting section 70B is
25 provided below the first guide plate 21. The second
gripping section 60Bis adaptedto grip the yarn end YB from
the lower side, which has been introduced to the guide
groove 22b, at a second gripping position 69B. The second
cutting section 70B is adapted to cut the yarn end YB from
30 the lower side, which has been introduced to the guide
groove 21b, at a second cutting position 79B under a state
where t h e yarn end YB from t h e lower s i d e is gripped by t h e
second gripping s e c t i o n 60B.
As described above, t h e f i r s t guide p l a t e 21 is
arranged between t h e f i r s t gripping s e c t i o n 60A and t h e
5 f i r s t c u t t i n g s e c t i o n 70A, and is adapted t o r e g u l a t e
movement of t h e yarn end YA from t h e upper s i d e i n a f i r s t
d i r e c t i o n ( a l e f t - r i g h t d i r e c t i o n i n t h i s c a s e ) t h a t is
v e r t i c a l t o a d i r e c t i o n i n which t h e f i r s t gripping s e c t i o n
60A and t h e f i r s t c u t t i n g s e c t i o n 70A face each o t h e r ( t h a t
10 is, a d i r e c t i o n along t h e yarn p a t h ) . The second guide
p l a t e 22 is arranged between t h e second gripping s e c t i o n
60B and t h e second c u t t i n g s e c t i o n 70B, and is adapted t o
r e g u l a t e movement of t h e yarn end YB from t h e lower s i d e
i n a second d i r e c t i o n ( t h e l e f t - r i g h t d i r e c t i o n i n t h i s
15 c a s e ) t h a t is v e r t i c a l t o a d i r e c t i o n i n which t h e second
g r i p p i n g s e c t i o r , 60Bandthe s z c o n d c u t t i n g s e c t i o n 7 0 B f a c e
each o t h e r ( t h a t is, t h e d i r e c t i o n along t h e yarn p a t h ) .
By i n t r o d u c i n g t h e r e t o t h e yarn end YA from t h e upper
s i d e t h a t has been cut by t h e f i r s t c u t t i n g s e c t i o n 70A and
20 applying flow of u n t w i s t i n g a i r on t h e yarn end YA under
t h e s t a t e w h e r e t h e y a r n e n d Y A f r o m t h e u p p e r s i d e i s g r i p p e d
by t h e f i r s t gripping s e c t i o n 60A, t h e f i r s t u n t w i s t i n g
s e c t i o n 40A is adapted t o untwist t h e yarn end YA. By
i n t r o d u c i n g t h e r e t o t h e yarn endYB fromthe lower s i d e t h a t
25 has been cut by t h e second c u t t i n g s e c t i o n 70B and applying
flow o f u n t w i s t i n g a i r on t h e yarn end YB under t h e s t a t e
where t h e yarn end YB from t h e lower s i d e is gripped by t h e
second gripping s e c t i o n 60B, t h e second u n t w i s t i n g s e c t i o n
40B is adapted t o untwist t h e yarn end YB. In o t h e r words,
30 t h e f i r s t u n t w i s t i n g s e c t i o n 40A i n t r o d u c e s t h e r e t o t h e
yarn end YA from an upper s i d e i n a v e r t i c a l d i r e c t i o n ( t h a t
is, one side in a predetermined direction) along a
horizontal direction (a direction that crosses the
predetermined direction), which is a direction of a yarn
travelling path formed between the bobbin supporting
5 section2 andthewindingsection13. The seconduntwisting
section 40B introduces thereto the yarn end YB from a lower
side in the vertical direction (the other side in the
predetermined direction) along the horizontal direction.
In this case, directions of gravity actions with respect
10 to the yarn end YA in the first untwisting section 40A and
the yarn end YB in the second untwisting section 40B are
different from each other.
Under a state where the yarn end YA from the upper
side is gripped by the first gripping section 60A and the
15 yarn end YB from the lower side is gripped by the second
gripping section 60G, the yarn splicing section 50 is
adapted to twist the yarn end YA from the upper side that
has been untwisted by the first untwisting section 40A and
the yarn end YB from the lower side that has been untwisted
20 by the second untwisting section 40B together. When the
yarn end YA and the yarn end YB are twisted together by the
yarn splicing section 50, the yarn end YA and the yarn end
YB are respectivelydrawn fromthe first untwisting section
40A and the second untwisting section 40B by the yarn
25 drawing levers 81, and tip-end portions of the yarn end YA
a n d t h e y a r n e n d Y B a r e h e l d i n p r o x i m i t y t o t h e y a r n s p l i c i n g
section 50 by the twist stopping levers 82.
As illustrated in FIG. 3, the yarn splicing device
10 according to the present embodiment includes an
30 untwisting air supplying section (compressed air supplying
section) 45, a first electromagnetic valve (first valve
portion) 46A, a second electromagnetic valve (second valve
portion) 46B and a control section 47.
The untwisting air supplying section 45 is adapted
to supply untwisting air as compressed air and may be an
5 air compressor or the like, for example. A main flow path
48M formed of a pipe or the like is connected to the
untwistingai-r supplying section 45. Afirst flowpath 48A
and a second flow path 48B both formed of a pipe or the like
are connected to the main flow path 48M at downstream
10 thereof via a branch portion X. Accordingly, after being
circulated through the main flow path 48M and branched at
the branch portion X, the untwisting air supplied from the
untwisting air supplying section 45 is circulated to the
first untwisting section 40A through the first flow path
15 48A and to the second untwisting section 40B through the
second flow path 48B.
The first electromagnetic valve 46A is adapted to
permit/block the circulation of the untwisting air to the
first untwisting section 40A and is arranged in the first
20 flow path 48A. The second electromagnetic valve 46B is
adapted to permit/block the circulation of the untwisting
air to the second untwisting section 40B and is arranged
in the second flow path 48B. The first electromagnetic
valve 46A and the second electromagnetic valve 46B are
25 connected to the control section 47, and opening/closing
thereof is controlled by the control section 47.
By controlling at least either of opening/closing
timings of the first electromagnetic valve 46A and the
second electromagnetic valve 46B, the control section 47
30 is able to control a timing of injecting the untwisting air
and a period of time the untwisting air is injected such
t h a t a supply amount of t h e untwisting a i r supplied t o t h e
f i r s t u n t w i s t i n g s e c t i o n 40A ( h e r e i n a f t e r r e f e r r e d t o a s
a " f i r s t u n t w i s t i n g a i r supply amount") a n d a supply amount
of t h e u n t w i s t i n g a i r supplied t o t h e second u n t w i s t i n g
5 s e c t i o n 40B ( h e r e i n a f t e r r e f e r r e d t o as a "second
untwisting a i r supply amount") a r e changed so a s t o d i f f e r
from each o t h e r . Accordingly, t h e c o n t r o l s e c t i o n 47
causes a c t i o n of t h e a i r f l o w on t h e yarn end YA i n t h e f i r s t
u n t w i s t i n g s e c t i o n 4 O A a n d a c t i o n o f t h e a i r f l o w on t h e yarn
10 end YB i n t h e second u n t w i s t i n g s e c t i o n 40B t o d i f f e r from
each o t h e r t o a d j u s t t h e u n t w i s t i n g s t a t e s of t h e yarn end
YA and t h e yarn end YB such t h a t t h e u n t w i s t i n g s t a t e s a r e
equal t o each o t h e r .
[ o p e r a t i o n s of t h e yarn s p l i c i n g device]
15 Next, t h e above-described o p e r a t i o n s of t h e yarn
s p i i c i n y device 10 ( t h a t is, a method f o r yarn s p l i c i n g
p e r f o r m e d i n t h e y a r n s p l i c i n g d e v i c e 1 0 ) w i l l b e d e s c r i b e d .
As i l l u s t r a t e d i n F I G . 2, s i n c e t h e yarn drawing
l e v e r s 81 swing t o a s i d e of t h e f i r s t u n t w i s t i n g s e c t i o n
20 40A and t h e second u n t w i s t i n g s e c t i o n 40B, t h e yarn end YA
from t h e upper s i d e t h a t has been guided by t h e upper-yarn
c a t c h i n g d e v i c e 12 (see F I G . 1) and t h e yarn end YB from
t h e lower s i d e t h a t has been guided by t h e lower-yarn
c a t c h i n g d e v i c e 7 (see FIG. 1) a r e drawn t o t h e s i d e of t h e
25 f i r s t u n t w i s t i n g s e c t i o n 40A and t h e second untwisting
s e c t i o n 40B. Consequently, t h e yarn end YA from t h e upper
sideisintroducedtotheguide groove 21a o f t h e f i r s t guide
p l a t e 21, t h e guide groove 22a of t h e second guide p l a t e
22, and a yarn s p l i c i n g nozzle 51 of t h e yarn s p l i c i n g
30 s e c t i o n 50. S i m i l a r l y , t h e yarn end YB from t h e lower s i d e
is introduced t o t h e guide groove 21b of t h e f i r s t guide
plate 21, the guide groove 22b of the second guide plate
22, and the yarn splicing nozzle 51 of the yarn splicing
section 5 0 . When being introduced to the yarn splicing
nozzle 51, the yarn end YA from the upper side and the yarn
5 end YB from the lower side are arranged in an accommodating
section 52 via a guide inclined portion 53.
Subsequently, t h e y a r n e n d Y A f r o m t h e u p p e r side that
has been introduced to the guide groove 21a of the first
guide plate 21 is gripped in proximity to the guide groove
10 21a by the first gripping section 60A (a first gripping
process). Similarly, the yarn end YB from the lower side
that has been introduced to the guide groove 22b of the
second guide plate 22 is gripped in proximity to the guide
groove 22b by the second gripping section 60B (a second
15 gripping process). Then, the yarn end YA from the upper
side that has been introduced to the guide groove 22a of
the second guide plate 22 is cut in proximity to the guide
groove 22a by the first cutting section 70A under a state
of being gripped by the first gripping section 60A (a first
20 cutting process) . Similarly, the yarn end YB from the lower
side that has been introduced to the guide groove 21b of
the first guide plate 21 is cut in proximity to the guide
groove 21b by the second cutting section 70B under a state
of being gripped by the second gripping section 60B (a
26 second cutting process) .
Subsequently, by the first untwisting section 40A
injecting untwisting air from an injection hole into an
untwisting nozzle 43, the yarn end YA from the upper side
that has been cut by the first cutting section 70A is
30 introducedtoanduntwistedbythe first untwisting section
40A under the state of being gripped by the first gripping
section 60A (a first untwisting process). Similarly, by
the second untwisting section 40B injecting untwisting air
from an injection hole into an untwisting nozzle 43, the
yarn end YB from the lower side that has been cut by the
5 second cutting section 70B is introduced to and untwisted
by the second untwisting section 40B under the state of
being gripped by the second gripping section 60B (a second
untwisting process).
Subsequently, since the yarn drawing levers 81
10 further swing to the side of the first untwisting section
40A and the second untwisting section 40B, the yarn end YA
from the upper side is drawn from the first untwisting
section 40A and the yarn end YB from the lower side is drawn
from the second untwisting section 40B. Then, the tip-end
15 portions of the yarn end YA from the upper side and the yarn
end YE from the lower sidc are held in proximity to the yarii
splicing section 50 by the twist stopping levers 82 that
have swung with the yarn drawing levers 81. Then, by the
yarn splicing section 50 injecting yarn splicing air from
20 an injection hole into the accommodating section 52, the
yarn end YA from the upper side that has been untwisted by
the first untwisting section 40A and the yarn end YB from
the lower side that has been untwisted by the second
untwisting section 40B are twisted together (a yarn
25 splicing process) . At this time, the yarn end YA from the
upper side is under the state of being gripped by the first
gripping section 60Aandthe yarn endYB fromthe lower side
is under the state of being gripped by the second gripping
section 60B.
30 Subsequently, the yarn drawing levers 81 and the
twist stopping levers 82 swing to an opposite side of the
first untwisting section 40A and the second untwisting
section 40Br and the first gripping section 60A and the
second gripping section 60B release the gripping.
Accordingly, the yarn Y connected by splicing the yarn end
5 YA from the upper side and the yarn end YB from the lower
side returns to the yarn path in the front side of the yarn
splicing device 10.
In the above-described first untwisting process and
seconduntwistingprocess, the control section 47 controls
10 the first electromagnetic valve 46A and the second
electromagnetic valve 46B independently fromeach other to
change at least either of an opening/closing timing (a
timing of permitting/blocking the circulation of the
untwisting air) of the first electromagnetic valve 46A or
15 an opening/closingtiming (atiming ofpermitting/blocking
the circulation of the untwisting air) of the second
electromagnetic valve 46B. In such a manner, the first
untwistingair supply amount (a first compressedair supply
amount) and the second untwisting air supply amount (a
20 second compressed air supply amount) are caused to differ
fromeach other, thereby allowingthe action ofthe airflow
on the yarn end YA in the first untwisting section 40A and
the action of the airflow on the yarn end YB in the second
untwisting section 40B to differ from each other such that
25 the untwisting states of the yarn end YA and the yarn end
YB are equal to each other.
Consequently, since even when twisting states ofthe
yarn end YA and the yarn end YB differ from each other, the
untwisting air is injected according to the yarn end YA and
30 the yarn end YB, the untwisting states of the yarn end YA
and the yarn end YB, which are respectively untwisted in
the first untwisting section 40A and the second untwisting
section 40B, are adjusted so as to be equal to each other.
For example, in a case where the yarn end YA is easier to
be untwisted than the yarn end YB, the opening/closing
5 timings of the first electromagnetic valve 46A and the
second electromagnetic valve 46B are appropriately
controlledto reduce the first untwisting air supply amount
more than the second untwisting air supply amount such that
the untwisting states of the yarn end YA and the yarn end
10 YB are equal to each other.
According to the present embodiment, the actions of
the airflow on the yarn endYAandthe yarn endYB are caused
to differ from each other such that the untwisting states
of the yarn end YA and the yarn end YB are equal to each
15 other. Thus, for example, even in a case where twisting
of the yarn end YA and the yarn end YB has directional
properties and twisting states of the yarn end YA and the
yarn end YB differ from each other, or in a case where
directions of injection of the untwisting air towards the
20 y a r n e n d Y A a n d t h e y a r n e n d Y B a r e d i f f e r e n t f r o m a d i r e c t i o n
of gravitational force and are not absolutely symmetric,
each of the yarn end YA and the yarn end YB can be
sufficiently untwisted under untwisting conditions that
respectively suit each property of the yarn end YA and the
25 yarn end YB. Accordingly, since adjustment can be made to
equalize the untwisting states, the yarn splicing of the
untwisted yarn end YA and yarn end YB can be favorably
performed.
Further, in the present embodiment, as described
30 above, with untwisting adjustment for changing the first
untwisting air supply amount and the second untwisting air
supply amount, the untwisting states of the yarn end YA and
the yarn end YB can be changed so as to be equal to each
other. In other words, the first electromagnetic valve 46A
and the second electromagnetic valve 46B are respectively
5 providedinthe first flow path 48A and the second flow path
48B, and by individually controlling the opening/closing
timi ngs thereof, the f i rst untwisting air supply amount and
the second untwisting air supply amount are changed so as
to differ from each other, allowing adjustment to equalize
10 the untwisting states of the yarn end YA and the yarn end
YB.
Since the air supply amounts can be changed with the
opening/closingtimings ofthe first electromagnetic valve
46Aandthe secondelectromagneticvalve 46B, inthe present
15 embodiment, the untwisting states of the yarn end YA and
the yarnendYBcanbe changedwitha simrjlevalvemechanisx.
In the winding unit 1 of the present embodiment,
setting of the yarn splicing device 10 provided in the
winding unit 1 can be easily changed by control. In a
20 textile machine such as an automatic winder including a
plurality of the winding units 1, or the like, the settings
ofthe yarn splicingdevices 10 eachprovidedinthewinding
units 1 can be simultaneously changed.
In the present embodiment, instead of or in addition
25 to the control of the opening/closing timings of the first
electromagnetic valve 46A and the second electromagnetic
valve 46B, by adjusting at least either of valve opening
degrees of the first electromagnetic valve 46A and the
second electromagnetic valve 46B, the first untwisting air
30 supply amount and the second untwisting air supply amount
may be adjusted such that the untwisting states of the yarn
end YA and the yarn end YB are equal to each other.
Consequently, with the valve opening degrees (that
is, reduced amounts) ofthe first electromagnetic valve 4 6 ~
and the second electromagnetic valve 46B, the first
5 untwisting air supply amount and the second untwisting air
supplyamount canbe changedsoastodiffer fromeachother.
Further, since timings of supplying the untwisting air to
the first untwisting section 40A and the second untwisting
section 40B canbe same, control canbe simplified. In this
10 case, the first electromagnetic valve 46A and the second
electromagneticvalve 46Brespectivelyformthe first valve
portion and the second valve portion.
In the present embodiment, the first electromagnetic
valve 46A and the second electromagnetic valve 46B are
15 controlled by the control section 47, but instead of or in
addition to this, the control may be performed by the
control section 16 provided in the winding unit 1 or by an
upper control section provided in the automatic winder.
In the present embodiment, the first electromagnetic
20 valve 46A and the second electromagnetic valve 46B are
adjustedunderthe automatic control by the control section
47 to simplify change of setting, but the first
electromagnetic valve 46A and the second electromagnetic
valve 46B can be manually adjusted without providing the
25 control section 47. The adjustment ofthe opening/closing
timings and the valve opening degrees of the first
electromagnetic valve 46A and the second electromagnetic
valve 46B is not limited, and may be appropriately set such
that the untwisting states of the yarn end YA and the yarn
30 end YB are equal to each other. In the description above,
the first electromagnetic valve 46A, the second
electromagnetic valve 46B, and the control section 47 form
an untwisting adjusting section.
Next, a second embodiment of the present invention
will be described. In a description of the present
5 embodiment, features that are different from the first
embodiment will be mainly described.
As illustrated in FIG. 4, a yarn splicing device 110
according to the present embodiment differs from the
above-describedyarnsplicingdevice10 (see FIG. 3) inthat
10 a f i r s t p r e s s u r e a d j u s t m e n t v a l v e 1 4 1 A a n d a secondpressure
adjustment valve 141B are further included therein.
The first pressure adjustment valve 141A is provided
upstreamofthe first electromagneticvalve 46Ainthe first
flow path 48A, and is adapted to adjust pressure of the
15 untwisting air circulatinginthe first flow path 48A. The
second pressure adjustment valve 141B is provided upstream
of the second electromagnetic valve 46B in the second flow
path 48B, and is adapted to adjust pressure of the
untwisting air circulating in the second flow path 48B. As
20 the first pressure adjustment valve 141A and the second
pressure adjustment valve 141B, a pressure reducing valve
or the like are used, for example. The first pressure
adjustment valve 141A and the second pressure adjustment
valve 141B are connected to the control section 47, and
25 amounts of the pressure adjustment are controlled by the
control section 47.
By controlling at least one of the first
electromagnetic valve 46A, the second electromagnetic
valve 46B, the first pressure adjustment valve 141A and the
30 second pressure adjustment valve 141B, the control section
47 changes the first untwisting air supply amount and the
second untwisting air supply amount so as to differ from
each other and thereby adjust sthe untwisting states ofthe
yarn end YA and the yarn end YB such that the untwisting
states are equal to each other. In this case, the first
5 pressure adjustment valve 141A and the second pressure
adjustment valve 141B respectively form a first reducing
section and a second reducing section.
Also in the present embodiment, each of the yarn end
YA and the yarn end YB can be sufficiently untwisted under
10 untwisting conditionsthat respectively suiteachproperty
of the yarn end YA and the yarn end YB. Accordingly, since
adjustment can be made to equalize the untwisting states,
the yarn splicing of the yarn end YA and the yarn end YB
can be favorably performed.
15 In the present embodiment, as described above, the
first p~essure adjustmei-~t valve 14111 arid the secoi-id
pressure adjustment valve 141B are respectively provided
in the first flow path 48A and the second flow path 48B.
Consequently, with the pressure of the untwisting air
20 circulating in the first flow path 48A and the second flow
path 48B, the first untwisting air supply amount and the
second untwisting air supply amount are changed so as to
differ fromeach other, a l l o w i n g a d j u s t m e n t t o e q u a l i z e t h e
untwisting states of the yarn end YA and the yarn end YB.
25 In the present embodiment, although adjustment can
be made to equalize the untwisting states of the yarn end
YA and the yarn end YB by cooperatively operating the first
electromagnetic valve 46A, the second electromagnetic
valve 46B, the first pressure adjustment valve 141A and the
30 second pressure adjustment valve 141B, the first
electromagnetic valve 46A and the second electromagnetic
valve 46B may not be provided depending on the case.
In the present embodiment, the first pressure
adjustment valve 141A and the second pressure adjustment
valve 141B are adjusted under an automatic control by the
5 control section 47 to simplify change of setting, but the
first pressure adjustment valve 141A and the second
pressure adjustment valve 141B can be manually adjusted
without providing the control section 47. The pressure of
the untwisting air adjusted by the first pressure
10 adjustment valve 141A and the second pressure adjustment
valve141Bis not limited, andmaybeappropriatelysetsuch
that the untwisting states of the yarn end YA and the yarn
end YB are equal to each other. In the description above,
the first electromagnetic valve 46A, the second
15 electromagnetic valve 46B, the first pressure adjustment
valve ?4?A, the second pressure adjustment valve 141B and
the control section 47 form an untwisting adjusting
section.
Next, a third embodiment of the present invention
20 will be described. In a description of the present
embodiment, features that are different from the first
embodiment will be mainly described.
As illustrated in FIG. 5, a yarn splicing device 210
according to the present embodiment differs from the
25 above-describedyarnsplicingdevice10 (see FIG. 3) inthat
an electromagnetic valve 242 instead of the first
electromagnetic valve 46A and the second electromagnetic
valve 46B, anda flow ratio changing section 243 are further
included therein.
30 The electromagnetic valve 242 is providedinthemain
flowpath 48~andisa d a p t e d t o p e r m i t / b l o c k t h e c i r c u l a t i o n
of t h e u n t w i s t i n g a i r i n t h e main flow path 48M. The
electromagnetic valve 242 is connected t o t h e c o n t r o l
s e c t i o n 47, and an opening/closing t h e r e o f is c o n t r o l l e d
by t h e c o n t r o l s e c t i o n 47.
5 The flow r a t i o changing s e c t i o n 243 is a flow r a t i o
switching valve adapted t o change a r a t i o ( h e r e i n a f t e r
simply r e f e r r e d t o as a "flow r a t i o " ) between flow of t h e
untwisting a i r c i r c u l a t i n g t o t h e f i r s t flow path 48A and
flow of t h e u n t w i s t i n g a i r c i r c u l a t i n g t o t h e second flow
10 path 48B, and is p r o v i d e d i n t h e b r a n c h p o r t i o n x . The flow
r a t i o changing s e c t i o n 243 is connected t o t h e c o n t r o l
s e c t i o n 47, and t h e flow r a t i o is c o n t r o l l e d by t h e c o n t r o l
s e c t i o n 47. As i l l u s t r a t e d i n FIG. 6, t h e flow r a t i o
changing s e c t i o n 243 i n c l u d e s a housing 243a and a main
15 valve body 243b.
The housing 243a has a t u b u l a r shape with an a x i s L1
a s a c e n t e r . The main flow path 48M i s connected and
communicated t o t h e housing 243a. The f i r s t flow path 48A
and t h e second flow path 48B a r e connected andcommunicated
20 t o t h e housing 243a. The f i r s t f l o w p a t h 48Aandthe second
flow path 48B a r e r e s p e c t i v e l y adjacent t o one s i d e and t h e
o t h e r s i d e o f t h e m a i n flow path 48Min an a x i s L l d i r e c t i o n .
The main valve body 243b has a bowl shape and is
provided i n t h e housing 243a so a s t o c l o s e openings a t end
25 p o r t i o n s of t h e main flow path 48M, t h e f i r s t flow path 48A
a n d t h e s e c o n d f l o w p a t h 4 8 B . P i s t o n s 2 4 3 c a r e r e s p e c t i v e l y
connected t o both end p o r t i o n s of t h e main valve body 243b
i n t h e a x i s L1 d i r e c t i o n . The main valve body 243b i s
a d a p t e d t o s l i d e along t h e a x i s L l d i r e c t i o n i n conjunction
30 with movements of t h e p i s t o n s 243c. For example, under a
s t a t e (an i l l u s t r a t e d s t a t e ) where t h e m a i n v a l v e body 24333
is positionedclosestto a side ofthe second flow path 48B,
an internal space V of the main valve body 243b is
communicated to the main flow path 48M, a part of the first
flow path 48A and the second flow path 48B.
5 The pistons 243c are arranged such that side valve
chambers 243d are respectively provided at both internal
end portions of the housing 243a in the axis L1 direction.
The pistons 243c slide along the axis L1 direction when the
sub valve chambers 243d are pressurized or depressurized.
10 In the flow ratio changing section 243, the pistons
243c are moved a predetermined distance under the control
of the control section 47, and thereby the main valve body
243b is moved the predetermined distance. Accordingly,
since a ratio between opening areas of the first flow path
15 48Aandthe second flowpath 4 8 B w i t h r e s p e c t t o t h e i n t e r n a l
space V of the main valve body 243b (an opening balance
between the first flow path 48A and the second flow path
48B) is changed, the flow ratio can be favorably changed.
Also in the present embodiment, each of the yarn end
20 YA and the yarn end YB is sufficiently untwisted under
untwisting conditionsthat respectively suiteachproperty
of the yarn end YA and the yarn end YB. Accordingly, since
adjustment can be made to equalize the untwisting states,
the yarn splicing of the yarn end YA and the yarn end YB
26 can be favorably performed.
In the present embodiment, as described above, one
electromagnetic valve 242 and the flow ratio changing
section 243 are provided. Accordingly, the first
untwisting air supply amount and the second untwisting air
30 supply amount are changed so as to differ from each other,
thereby allowing adjustment to equalize the untwisting
states of the yarn end YA and the yarn end YB.
In the present embodiment, the flow ratio changing
section 243 is provided, but the present invention is not
limitedthereto. Various configurations adaptedto change
5 the flow rate may be provided. In addition, the flow ratio
adjusted by the flow ratio changing section 243 is not
limited, and may be appropriately set such that the
untwisting states of the yarn end YA and the yarn end YB
are equal to each other.
10 Embodiments of the present invention have been
described above, but the present invention is not limited
to the above-described embodiments. In the
above-described embodiments, the yarn splicing device 10
is applied to the winding unit 1 of the automatic winder,
15 for example, but a yarn splicing device of the present
invention may be applied to a winding unit of a spinning
machine, a working carriage adapted to move between a
plurality of winding units, or the like. In a case where
theyarnsplicingdeviceofthepresentinventionis applied
20 to the winding unit of the spinning machine, a yarn
supplying section of the present invention is formed of a
draft device adapted to supply a spun yarn and a spinning
device, or the like.
The untwisting adjusting sections of the
25 above-describedembodiments cause the first untwisting air
supply amount and the second untwisting air supply amount
to differ from each other, but the present invention is not
limited thereto. In short, the action of the airflow on
the yarn end YA in the first untwisting section 40A and the
30 action of the airflow on the yarn end YB in the second
u n t w i s t i n g s e c t i o n 4 0 B m e r e l y n e e d t o d i f f e r f r o m e a c h o t h e r
such that the untwisting states of the yarn end YA and the
yarn end YB are equal to each other.
For example, an untwisting adjusting section may
cause a length of the yarn end YA introduced to the first
5 untwisting section 40A and a length of the yarn end YB
introduced to the second untwisting section 40B to differ
from each other such that the untwisting states of the yarn
end YA and the yarn end YB are equal to each other.
Specifically, in the present embodiment, the untwisting
10 adjusting section (not illustrated) is a yarn guiding
section, and there may be provided a lever position
adjustment mechanism capable of adjusting a positional
relationship of the pair of yarn drawing levers (lever
portion) 81 with respect to each other.
15 Consequently, by adjusting the positional
relationship of the pair of yarn drawing levers 81 with
respect to each other, the lengths of the yarn end YA and
the yarn end YB that are respectively introduced to the
first untwisting section 40A and the second untwisting
20 section 40B are caused to differ from each other.
Accordingly, adjustment can be made to equalize the
untwisting states of the yarn end YA and the yarn end YB.
Further, since a yarn guiding section used in a normal yarn
splicing operation can be used, providing a special member
25 separately is not required.
Instead of or in addition to the lever position
adjustment mechanism, the following configuration may be
provided. That is, a configuration in which the first
gripping position 69A in the first gripping section 60A is
30 moved may be provided to adjust the length of the yarn end
YA introduced to the first untwisting section 40A. A
configuration in which the second gripping position 69B in
the second gripping section 60B is moved may also be
provided to adjust the length of the yarn end YB introduced
to the second untwisting section 40B.
5 The above-described "equal" indicates not only an
absolutelyequalcase, butalsoa substantially equal case,
a case where equalization is intended, or the like, and
tolerates a manufacturing error or variation, for example.
In addition, if a yarn has directional properties, the
10 untwisting states of the yarn end YA and the yarn end YB
may differ from each other. In such a case, making similar
appearances of the yarn end YA and the yarn end YB at the
time of being untwisted is also included.
In each of the above-described embodiments, the
15 action of the airflow on the yarn end YA in the first
untwisting section 40A and the action of the airflow on the
yarn end YB in the second untwisting section 40B are caused
to differ from each other such that the untwisting states
of the yarn end YA and the yarn end YB are equal to each
20 other. Needless to say, when twisting states of the yarn
endYAandthe y a r n e n d Y B a r e e q u a l t o e a c h o t h e r , theaction
of the airflow on the yarn end YA in the first untwisting
section 40A and the action of the airflow on the yarn end
YB in the second untwisting section 40B can be set to be
25 same.
In the yarn splicing device, actions of the airflow
on the first yarn end and the second yarn end are caused
todiffer fromeachother, andtherebytheuntwisting states
of the first yarn end and the second yarn end can be made
30 equal to each other. Therefore, for example, in a case
where twisting states of the first yarn end and the second
yarn end differ from each other, adjustment can be made to
equalize the untwisting states of the first yarn end and
the second yarn end by untwisting each of the first yarn
end and the second yarn end under untwisting conditions,
5 which respectively suit the first yarn end and the second
yarn end. Accordingly, the yarn splicing of the untwisted
first yarn end and second yarn end can be favorably
performed.
The untwisting adjusting section includes a
10 compressed air supplying section adapted to supply
compressed air to the first untwisting section and the
second untwisting section. The untwisting adjusting
section is preferably adapted to cause a first compressed
air supply amount, which is a supply amount of the
15 compressed air supplied from the compressed air supplying
section to the first untwisting section, and a second
compressed air supply amount, which is a supply amount of
the compressed air supplied from the compressed air
supplying section to the second untwisting section, to
20 differ from each other such that the untwisting states of
the first yarn end and the second yarn end are made equal
to each other. Accordingly, the first compressed air
supply amount and the second compressed air supply amount
are caused to differ from each other, thereby allowing
25 adjustment to equalize the untwisting states of the first
yarn end and the second yarn end.
At this time, the untwisting adjusting section
further includes a first valve portion adapted to
p e r m i t / b l o c k c i r c u l a t i o n o f t h e compressedair tothe first
30 untwisting section, a second valve portion adapted to
permit/block circulation of the compressed air to the
second u n t w i s t i n g s e c t i o n , and a c o n t r o l s e c t i o n adapted
t o c o n t r o l t h e f i r s t valve p o r t i o n and t h e second valve
p o r t i o n . The u n t w i s t i n g a d j u s t i n g s e c t i o n is p r e f e r a b l y
a d a p t e d t o cause t h e f i r s t compressed a i r supply amount and
5 t h e second compressedair supply amount t o d i f f e r fromeach
o t h e r by c h a n g i n g w i t h t h e c o n t r o l s e c t i o n , a t l e a s t e i t h e r
of a timing of permitting/blocking t h e c i r c u l a t i o n of t h e
compressed a i r by t h e f i r s t valve p o r t i o n o r a t i m i n g o f
permitting/blocking t h e c i r c u l a t i o n of t h e compressed a i r
10 by t h e secondvalve p o r t i o n . In t h i s case, w i t h t h e timings
of permitting/blocking by t h e f i r s t valve p o r t i o n and t h e
second valve p o r t i o n , t h e f i r s t compressed a i r supply
amount and t h e second compressed a i r supply amount can be
changed so a s t o d i f f e r from each o t h e r .
15 The u n t w i s t i n g a d j u s t i n g s e c t i o n p r e f e r a b l y f u r t h e r
5
includzs a f i r s t reducing s e c t i o n provide d i n a f i r s t flow
path through which t h e compressed a i r is c i r c u l a t e d t o t h e
f i r s t u n t w i s t i n g s e c t i o n , and a second reducing s e c t i o n
p r o v i d e d i n a second flow path throughwhich t h e compressed
20 a i r is c i r c u l a t e d t o t h e second u n t w i s t i n g s e c t i o n . The
u n t w i s t i n g a d j u s t i n g sectionispreferablyadaptedtocause
t h e f i r s t compressed a i r supply amount and t h e second
compressed a i r supply amount t o d i f f e r from each o t h e r by
a d j u s t i n g a t l e a s t e i t h e r of an amount reduced by t h e f i r s t
25 reducingsectionoranamountreducedbythe secondreducing
s e c t i o n . In t h i s case, with the reduced amounts of t h e
f i r s t reducing s e c t i o n a n d t h e second reducing s e c t i o n , t h e
f i r s t compressed a i r supply amount and t h e second
compressed a i r supply amount can be changed so as t o d i f f e r
30 from each o t h e r .
The u n t w i s t i n g a d j u s t i n g s e c t i o n p r e f e r a b l y f u r t h e r
i n c l u d e s a c o n t r o l s e c t i o n adapted t o c o n t r o l a t l e a s t
e i t h e r of t h e amount reduced by t h e f i r s t reducing s e c t i o n
or t h e amount reduced by t h e second reducing s e c t i o n . In
t h i s case, change of s e t t i n g can be s i m p l i f i e d .
5 The yarn s p l i c i n g device p r e f e r a b l y f u r t h e r i n c l u d e s
a main flow path through which t h e compressed a i r s u p p l i e d
from t h e compressed a i r supplying s e c t i o n is c i r c u l a t e d ,
a f i r s t flow path connected t o a downstream p o r t i o n of t h e
main flow path v i a a branch p o r t i o n and through which t h e
10 compressed a i r is c i r c u l a t e d t o t h e f i r s t u n t w i s t i n g
s e c t i o n , and a second flow path connected t o t h e downstream
p o r t i o n of t h e main flow path v i a t h e branch p o r t i o n and
throughwhichthe compressedair is c i r c u l a t e d t o t h e second
u n t w i s t i n g s e c t i o n . The u n t w i s t i n g a d j u s t i n g s e c t i o n
15 p r e f e r a b l y i n c l u d e s a flow r a t i o changing s e c t i o n provided
at- tho branch p o r t i o n and adapted t o cause t h e f i r s t
compressed a i r supply amount and t h e second compressed a i r
supply amount t o d i f f e r from each o t h e r by changing a r a t i o
between a flow o f t h e compressedair c i r c u l a t e d t o t h e f i r s t
20 flow path and a flow of t h e compressed a i r c i r c u l a t e d t o
t h e second f l o w p a t h . I n t h i s case, with changingthe r a t i o
between t h e flows respectivelycirculatedtothe f i r s t flow
path and t h e second flow path, t h e f i r s t compressed a i r
supply amount and t h e second compressed a i r supply amount
25 can be chdrlyed so a s t o d i f f e r from each o t h e r .
The u n t w i s t i n g a d j u s t i n g s e c t i o n is p r e f e r a b l y
adapted t o cause a l e n g t h of t h e f i r s t yarn end introduced
t o t h e f i r s t u n t w i s t i n g s e c t i o n and a l e n g t h of the second
yarn end introduced t o t h e second u n t w i s t i n g s e c t i o n t o
30 d i f f e r from each o t h e r such t h a t t h e u n t w i s t i n g s t a t e s of
t h e f i r s t yarn end and t h e second yarn end a r e equal t o each
other. Accordingly, the lengths of the first yarn end and
the second yarn end respectively introduced to the first
untwisting section and the second untwisting section are
changed so as to differ from each other, thereby allowing
5 adjustment to equalize the untwisting states of the first
yarn end and the second yarn end.
At this time, the untwisting adjusting section is a
yarn guiding section adapted to respectively guide the
first yarn end and the second yarn end from the first
10 untwisting sectionandthe seconduntwisting section tothe
yarn splicing section and preferably includes a pair of
lever portions adapted to guide the first yarn end and the
second yarn end, and a lever position adjustment mechanism
capable of adjusting a positional relationship ofthe pair
15 ofleverportionswithrespecttoeachother. Inthis case,
by adjusting the positional relationship of the pair of
lever portions with respect to each other, lengths of the
first yarn end and the second yarn end respectively
introducedintothe first untwisting sectionandthe second
20 untwisting section can be changed. Further in this case,
since a yarn guiding section used in a normal yarn splicing
operation can be used, providing a special member
separately is not required.
In some cases, the first untwisting section
25 introduces thereto the first yarn end from one side in a
predetermined direction, and the second untwisting section
introduces thereto the second yarn end from the other side
in the predetermined direction along a direction that
crosses the predetermined direction.
30 A winding unit according to the present invention
includes the above-described yarn splicing device, a yarn
supplying section adapted to supply a yarn and a winding
section adapted to wind the yarn. The predetermined
direction is adirectionof apathinwhichthe yarntravels,
and the path is formed between the yarn supplying section
5 and the winding section. Thus, in the winding units, the
yarn splicing of the first yarn end and the second yarn end
canbe favorablyperformed. Inaddition, change of setting
of the yarn splicing device provided in the winding unit
can be easily controlled.
10 Atextile machine according tothe present invention
includes a plurality of the winding units. Thus, in the
textile machine, the yarn splicing of the first yarn end
and the second yarn end can be favorably performed. In
addition, changes ofthe settings ofapluralityofthe yarn
15 splicing devices each provided in the plurality of winding
units can be simultaneously controlled.
A yarn splicing method according to the present
invention is a yarn splicing method for splicing a first
yarn end and a second yarn end together. The yarn splicing
20 method includes an untwisting process of untwisting the
first yarn end by introducing the first yarn end and
applying airflow on the first yarn end and untwisting the
second yarn end by introducing the second yarn end and
applyingairflowonthe second yarn end, anda yarn splicing
25 process of splicing the first yarn end and the second yarn
end together that have been untwisted in the untwisting
process. In the untwisting process, action of the airflow
on the first yarnendandactionofthe airflow onthe second
yarn end are caused to differ from each other such that
30 untwisting states of the first yarn end and the second yarn
end are made equal to each other. Thus, according to this
yarn splicing method, the yarn splicing of the first yarn
end and the second yarn end can be favorably performed.
The present invention enables the yarn splicing of
the first yarn end and the second yarn end to be favorably
5 performed.
We claim:
1. A yarn splicing device adapted to splice a first
yarn end and a second yarn end together, comprising:
a first untwisting section adapted to untwist the
5 first yarn end by introducing the first yarn end thereto
and applying airflow on the first yarn end;
a second untwisting section adapted to untwist the
second yarn end by introducing the second yarn end thereto
and applying airflow on the second yarn end;
10 a yarn splicing section adapted to splice the first
yarn end and the second yarn end together that have been
respectively untwisted in the first untwisting section and
the second untwisting section; characterized by
an untwisting adjusting section adapted to adjust
15 untwisting states of the first yarn end and the second yarn
end respectively untwisted in the first untwisting section
and the second untwisting section,
wherein the untwisting adjusting section is adapted
to cause action of the airflow on the first yarn end in the
20 first untwisting section and action of the airflow on the
second yarn end in the second untwisting section to differ
fromeach other such that the untwisting states ofthe first
yarn end and the second yarn end are equal to each other.
2 5 2. The yarn splicing device according to claim 1,
further comprising a compressed air supplying section
adapted to supply compressed air to the first untwisting
section and the second untwisting section, wherein the
untwisting adjusting section is adapted to cause a first
30 compressed air supply amount and a second compressed air
supply amount to differ from each other such that the
untwisting states of the first yarn endand the second yarn
endare equal to eachother, the first compressedair supply
amountbeinga supplyamountofcompressedairsuppliedfrom
the compressed air supplying section to the first
5 untwisting section and the second compressed air supply
amountbeingasupplyamountofcompressedairsuppliedfrom
the compressed air supplying section to the second
untwisting section.
10 3. The yarn splicing device according to claim 2,
wherein the untwisting adjusting section includes:
a first valve portion adapted to permit/block
circulation of the compressed air to the first untwisting
section;
15 a second valve portion adapted to permit/block
circulation of the compressed air to the second untwisting
section; and
a control section adapted to control the first valve
portion and the second valve portion, and
20 the untwisting adjusting section is adapted to cause
the first compressed air supply amount and the second
compressed air supply amount to differ from each other by
changing with the control section, at least either of a
timing of permitting/blocking the circulation of the
25 compressed air by the first valve portion or a timing of
permitting/blocking the circulation of the compressed air
by the second valve portion.
4. The yarn splicing device according to claim 2,
30 wherein the untwisting adjusting section includes:
a first reducing sectionprovidedina first flowpath
throughwhich t h e compressedair i s c i r c u l a t e d t o t h e f i r s t
untwisting s e c t i o n ; and
a second reducing s e c t i o n provided i n a second flow
path through which t h e compressed a i r is c i r c u l a t e d t o t h e
5 second untwisting s e c t i o n , and
t h e untwisting a d j u s t i n g s e c t i o n is adapted t o cause
t h e f i r s t compressed a i r supply amount and t h e ,second
compressed a i r supply amount t o d i f f e r from each o t h e r by
a d j u s t i n g a t l e a s t e i t h e r of an amount reduced by t h e f i r s t
10 r e d u c i n g s e c t i o n o r a n a m o u n t r e d u c e d b y t h e s e c o n d r e d u c i n g
s e c t i o n .
5. The yarn s p l i c i n g device according t o claim 4,
wherein t h e u n t w i s t i n g a d j u s t i n g s e c t i o n f u r t h e r i n c l u d e s
15 a c o n t r o l s e c t i o n adapted t o c o n t r o l a t l e a s t e i t h e r of t h e
amount reduced by t h e f i r s t reducing s e c t i o n o r t h e amount
reduced by t h e second reducing s e c t i o n .
6. The yarn s p l i c i n g device according t o claim 2,
20 c h a r a c t e r i z e d by
a main flow path through which t h e compressed a i r
supplied from t h e compressed a i r supplying s e c t i o n is
c i r c u l a t e d ;
a f i r s t flow path connected t o a downstream p o r t i o n
25 o f t h e m a i n flowpathviaabranchportion, andthroughwhich
t h e compressed a i r is c i r c u l a t e d t o t h e f i r s t untwisting
s e c t i o n ; and
a second flow path connected t o t h e downstream
p o r t i o n of t h e main flow path v i a t h e branch p o r t i o n , and
30 throughwhichthecompressedairiscirculatedtothe second
u n t w i s t i n g s e c t i o n ,
wherein the untwisting adjusting section includes a
flow ratio changing section provided at the branch portion
andadaptedto cause the first compressedair supply amount
and the second compressed air supply amount to differ from
5 each other by changing a ratio between a flow of the
compressed air circulated to the first flow path and a flow
of the compressed air circulated to the second flow path.
7. The yarn splicing device according to claim 1,
10 wherein the untwisting adjusting section is adapted to
cause a length ofthe first yarn endintroducedtothe first
untwisting section and a length of the second yarn end
introduced to the second untwisting section to differ from
each other such that the untwisting states of the yarn end
15 and the yarn end are equal to each other.
8. The yarn splicing device according to claim 7,
w h e r e i n t h e u n t w i s t i n g a d j u s t i n g s e c t i o n i s ayarnguiding
section adapted to respectively guide the first yarn end
20 and the second yarn end from the first untwisting section
and the second untwisting section to the yarn splicing
section, and
the untwisting adjusting section includes:
a pair of lever portions adapted to guide the first
25 yarn end and the second yarn end; and
a lever position adjustment mechanism capable of
adjusting a positional relationship of the pair of lever
portions with respect to each other.
30 9. The yarn splicing device according to any one of
claims 1 through 8, wherein the first untwisting section
is adapted to introduce thereto the first yarn end from one
side in a predetermined direction along a direction that
crosses the predetermined direction, and
the seconduntwisting section is adaptedtointroduce
5 thereto the second yarn end from the other side in the
predetermined direction along the direction that crosses
the predetermined direction.
10. A winding unit characterized by
10 the yarn splicing device according to any one of
claims 1 through 8;
a yarn supplying section adapted to supply a yarn;
and
a winding section adapted to wind the yarn.
15
11. A winding unit characterized by
the yarn splicing device according to claim 9;
a yarn supplying section adapted to supply a yarn;
and
20 a winding section adapted to wind the yarn,
wherein the predetermined direction is a direction
of a path in which the yarn travels, the path being formed
between the yarn supplying sectionandthewinding section.
2 5 12. A textile machine characterized by a plurality
of the winding units according to claim 10 or claim 11.
13. A yarn splicing method is a yarn splicing method
forsplicinga firstyarnendandasecondyarnendtogether,
30 comprising:
an untwisting process of untwisting the first yarn
end by introducing the first yarn end and applying airflow
on the first yarn end and untwisting the second yarn end
by introducing the second yarn end and applying airflow on
the second yarn end; and
5 a yarn splicing process of splicing the first yarn
end and the second yarn end together that have been
untwisted in the untwisting process, wherein
in the untwisting process, action of the airflow on
the first yarn end and action of the airflow on the second
10 yarn end are caused to differ from each other such that
untwisting states of the first yarn end and the second yarn
end are equal to each other.