YARN SPLICING DEVICE, WINDING UNIT, TEXTILE MACHINE AND
YARN SPLICING METHOD
BACKGROUND OE THE INVENTION
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.
2. Description of the Related Art
rn a yarn splicing device mounted to a textile machine
such as an automatic winder or the rike, after introducing
yarn ends of yarns that have been disconnected to an
untwisting section and then untwisting the yarns, the yarn
ends are spriced together. A method for untwisting the yarn
may be a method in which the yarn i-s untwisted by apprying
compressed air to the yarn. At this time, in a case where
the yarn is not sufficientry untwisted, when splicing the
yarn ends together, a defect in which a spriced portion of
the yarn is weak may occur.
rn the above-described method for untwisting the yarn,
one cause for the insufficient untwisting of the yarn may
be a defect in supply of the compressed air with which the
yarn is untwisted. Regarding this, for example, in a yarn
splicing device described in Japanese Examined patent
Pubrication No. 41219L8, pressure of a pipe adapted to
supply the compressed air to the untwisting section adapted
to untwist the yarn is detected by a pressure sensor, and
when reduction in pressure inside the pipe is detected, a
determination is made that there is a defect in an
electromagnetic varve adapted to contror- suppry of the
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compressed air. Accordingry, in the yarn spricing device
of Japanese Examined Patent publication No. 4]-27918, the
untwisting of the yarn is prevented from being
insufficient.
SUMMARY OF THE INVENTION
However, the cause for the insufficient untwisting
of the yarn does not always exist in the suppry of the
compressed air, and various causes may exist. Therefore,
in the yarn spricing device, detection of a defect in the
untwisting of the yarn itself is demanded.
An ob;ect of the present invention is to provide a
yarn spricing device capabre of detecting a defect in the
untwisting of the yarn, a winding unit, a textire machine
and a yarn splicing method.
A yarn splicing device of the present invention
adapted to sprice yarn ends together includes an untwisting
section adapted to introduce thereto, the yarn ends of yarns
that have been disconnected and to untwist the yarn ends,
and a yarn spricing section adapted to twist the yarn ends
together that have been untwisted by the untwisting
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sections.
untwist ing
untwi st ing
FIG.
according
t 1G.
device of
rLlT f/ -g.
The untwisting section is provided with an
monitoring section adapted to monitor an
state of the yarn end.
BR]EF DESCRIPT]ON OF THE DRAWINGS
1 is a front view illustrating a winding unit
to one embodiment of the present invention;
2 is a vertical sectional view of a yarn splicing
FIG. I;
3 is a diagram illustratinq a sectional
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structure of an untwisting section;
FIG. 4 is a diagram rll-ustrating a configuration of
a yarn winding unit;
FIG. 5A, 58, and 5C are each a diagram illustrating
an untwisting state; and
FIG. 6 is a diagram illustrating a sectional
structure of an untwisting section according to another
embodiment.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
A preferred embodiment of the present invention wiII
be hereinafter described in detail with reference to the
accompanying drawings. The same reference numeral-s are
denoted on the same or corresponding portions throughout
the drawings, and redundant description wiII be omitted.
IConf iguration of winding unit] As iIl-ustrated in FIG.
l, a winding unit 1 is adapted to wind a yarn Y from a yarn
supplying bobbin B around a package P. The yarn suppJ-ying
bobbin B is formed by a spinning machine at a previous stage
and is transported from the spinning machine in a state of
being set on a tray, for example. By arranging a plurality
of the winding units 1 side by side, an automatic winder
serving as a textile machine is formed.
The winding unit 1 includes a bobbin supporting
section (yarn supplying section) 2, a yarn unwinding
assisting device 3, a preclearer 4, a gate-type tenser 5,
a tension sensor 6, a Iower-yarn catching device (first
guiding section) '1, a yarn splicing device 10, a cutter 9,
a yarn clearer 11, an upper-yarn catching device (second
guiding section) 72 and a winding section 13 arranged in
this order from upstream (a lower side in this case) along
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a yarn path, whi-ch is a travelling path of the yarn y. Each
of the components is mounted to a machine base B.
The bobbin supporting section 2 is adapted to enabl-e
the yarn Y to be supplied by supporting the yarn supplying
bobbin B upright. The yarn unwinding assisting device 3
is adapted to contror a barroon of the yarn y unwound from
the yarn supplying bobbin B with a tuburar member arranged
above the yarn supprying bobbin B. The gate-type tenser
5 is adapted to appry a predetermined tension on the
traverring yarn Y by hording the yarn y in a zig-zag manner
with a pair of gates formed of a comb-teeth fixed gate and
a comb-teeth movabre gate. The tension sensor 6 is adapted
to measure the tension on the yarn y applied by the gate-type
tenser 5.
The precl-earer 4 is adapted to pre-regulate a passage
of a yarn defect, which is greater than a defined varue,
with a pair of regulating members arranged with the yarn
path therebetween. The yarn cfearer 11 is adapted to detect
a yarn defect such as a srub during winding of the yarn y.
The cutter 9 is adapted to cut the yarn y when the passage
of the yarn defect is regurated by the precrearer 4 or the
yarn defect is detected by the yarn clearer 11. The yarn
spricing device 10 is adapted to sprice a yarn end from the
package P and a yarn end from the yarn supprying bobbin B
at the time of cutting the yarn y by the cutter 9 or yarn
breakage of the yarn y.
The rower-yarn catching device 7 is mounted to the
machine base 8 in a swingable manner with an axial line q
as a center, and a suction mouth 7a is provided at a swinging
end t.hereof. The suction mouth 7a is swung between a part
above the yarn spricing device 10 and a part berow the
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preclearer 4. At the time of cutting the yarn y by the
cutter 9 or the yarn breakage of the yarn y, the lower-yarn
catching device 7 swings the suction mouth 7a to the part
below the precrearer 4 to suck a yarn end from a rower side
with the suction mouth 1 a, and then swings the suction mouth
7a to the part above the yarn splicing device 1O to guide
and deliver the yarn end from the lower side to the yarn
splicing device 10.
The upper-yarn catching device 12 is mounted to the
machine base B in a swingable manner with an axial line B
as a center, and a suction mouth l2a is provided at a swinging
end thereof. The suction mouth l2a is swung between a part
below the yarn spricing device 10 and the winding section
13. At the time of cutting the yarn y by the cutter 9 or
the yarn breakage of the yarn Y, the upper-yarn catching
device 72 swings the suction mouth 72a to a side of the
winding section 13 to suck a yarn end from an upper side
with the suction mouth l2a, and then swings the suction
mouth l2a to the part berow the yarn splicing device 1o to
guide and deliver the yarn end from the upper side to the
yarn splicing device 10.
The winding section 13 is adapted to wind the yarn
Y unwound from the yarn supplying bobbin B around the
package P to form a fully-wound package p. The winding
section 13 incrudes a winding drum 14 with a drum groove
14a formed thereover and a cradl-e 15 adapted to support the
package P in a rotatable manner. The cradl_e 15 brings a
surface of the package P into contact with a surface of the
winding drum 74 under appropriate contact pressure. By
rotating the package P tog'ether with the winding drum 14
being rotationarry driven with a motor, the winding section
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13 winds the yarn y around the package p while traversing
the yarn Y in a predetermined width.
A control- section 16, an input section 17 and a dispray
section 18 are provided in the machine base g. The contror
section 76 is adapted to contror each component of the
winding unit 1. The input section li serves as an
operational button, for example, and is used when an
operator sets various varues in the contror section 16, or
the rike. The dispray section 1B is adapted to dispray an
operational status or the rike of the winding unit 1. The
contror section 16 transmits/recej-ves various types of
information rerating to a winding operation tolfrom an
upper contror section provided in the automat-ic winder.
The upper contror section is adapted to controt an overarr
automatic winder by controlling.each contror section 15 of
the winding units 1.
IConfiguration of yarn splicing device] Next, a
configuration of the above-described yarn spricing device
10 will be described. rn the folrowing description, a side
of the package p and a side of the yarn supplying bobbin
B respectivety indicate an upper side and a l-ower side for
a convenient sake. simirarry, d side of the yarn path with
respect to the yarn splicing device 1o and an opposite side
of the yarn path side respectively indicate a front side
and a back side.
As irrustrated in FrG. 2, the yarn splicing devi-ce
10 includes a first untwisting section 4oA, a second
untwisting secLion 40B, a yarn spricing section 50 arranged
at a front side of the flrst untwisting section 40A and the
second untwisting section 40B, a pair of yarn drawing levers
B1 adapted to swing so as to sandwich the first untwisting
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section 40A and the second untwisting section 40B, and a
pair of twist stopping levers 82 adapted to swing so as to
sandwich the yarn spricing section 50. The yarn spricing
device 10 is mounted to the machine base B via a frame body
adapted to support each component of the yarn spricing
device 10.
Above the second untwisting section 4oB and berow the
first untwisting section 40A, a first guide plate 2l and
a second guide plate 22 are respectively arranged so as to
face each other with the yarn splicing section 50
therebetween. A guide groove 2la and a guide groove 21b
are formed in the first guide plate 21, and a guide groove
22a and a guide groove 22b are formed in the second guide
prate 22. The guide groove 2ta of the first guide prate
21 faces the guide groove 22a of the second guide pLaLe 22
in an upper-rower direction, and the guide groove 2]-.b of
the first guide plate 2l 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 yarn
end YA from the upper side that has been guided by the
upper-yarn catching devi ce 12 ) that has been drawn by one
of the yarn drawing revers B1 is introduced to the guide
groove 21a and the guide groove 22a facing each other in
the upper-lower direction. on the other hand, d ydrn end
YB from the lower side (that is, a yarn end yB from the rower
side that has been guided by the lower-yarn catching device
7 ) that has been drawn by the other of the yarn drawing levers
B1 is introduced to the guide groove 21b and the guide groove
22b facing each other in the upper-lower direction.
A first gripping section 5oA is provided above the
first guide plate 21, and a first cutting section 7oA is
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provided above the second guide prate 22. The first
gripping section 60A is adapted to grip at a first gripping
position 69A, the yarn end yA from the upper side that has
been introduced to the guide groove 2ra. Under a state
where the yarn end YA from the upper side is being gripped
by the first gripping section 6oA, the first cutting section
70A is adapted to cut at a first cutting position 79A, the
yarn end YA from the upper side that has been introduced
to the guide groove 22a.
In addition, a second gripping sectlon 6OB is
provided be]ow the second guide prate 22, and a second
cutting section 70B is provided berow the first guide plate
21. The second gripping section GOB is adapted to grip at
a second gripping positlon 698, the yarn end yB from the
rower side that has been introduced to the guide groove 22b.
Under a state where the yarn end yB from the rower side is
being gripped by the second gripping section 5oB, the second'
cutting section 70B is adapted to cut at a second cutting
position 798, the yarn end yB from the lower side that has
been introduced to the guide groove 2tb.
As described above, the first guide plate 2l is
arranged between the first gripping section GOA and the
first cutting section 70A and is adapted to regurate
movement of the yarn end yA from the upper side in a first
direction (a left-right dlrection in this case) verticar
to a direction in which the first gripping section G0A and
the first cutting section 70A face each other (that is, a
direction along the yarn path) . The second guide plaLe 22
is arranged between the second gripping section 608 and the
second cutting section 70B and is adapted to regurate
movement of the yarn end yB from the lower side in a second
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direction (the left-right direction in this case) vertical
to a direction in which the second gripping section 608 and
the second cutting section 7OB face each other (that is,
the dlrection along the yarn path) .
Under the state where the yarn end YA from the upper
side is being gripped by the first gripping section 60A,
the first untwisting section 40A is adapted to introduce
thereto, the yarn end YA from the upper side that has been
cut by the first cutting section 70A and to untwist the yarn
end YA. As illustrated in FIGS. 2 and 3, the first
untwisting section 40A is provided wj-th an in;ection hole
44 communicati-ng with an untwisting space S where the yarn
end YA is untwisted. The injection hole 44 ts arranged in
a side of an introduction opening 4OAa of the yarn end yA
in the first untwisting section 40A (on a Ieft side of the
drawings) . The injection hole 44 ts arranged at a position
about 5 mm inward from the introduction opening 4OAa, for
example. The injection hole 44 is adapted to inject
untwisting air (compressed air) to the untwisting space S.
An air supply source (not illustrated) is connected to the
injection hole 44.
Under the state where the yarn end yB from the lower
side is being gripped by the second gripping section 60B,
the second untwisting section 40B is adapted to introduce
thereto, the yarn end YB from the lower side that has been
cut by the second cutting section 70B and to untwist t.he
yarn end YB. As illustrated in FIGS. 2 and 3, the second
untwisting section 40B is provided with an injection hore
44 communicating with an untwisting space s where the yarn
end YB is untwisted. The injection hore 44 is arranged in
a side of an introduction opening 4OBa of the yarn end yB
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in the second untwisting section 4OB.
As illustrated in FIG. 3, a first sensor 90 and a
second sensor 92, which are an untwisting monitoring
section, are provided in each of the first untwi_sting
section 40A and the second untwisting section 4oB. The
first sensor 90 is an opticar sensor, and incrudes a right
projecting section 90a and a tight receiving section 90b.
The light projecting section 90a and the right receiving
section 90b are arranged at positions so as to face each
other with the untwlsting space S therebetween. The second
sensor 92 is an opticar sensor. and incrudes a right
projecting sect:-on 92a and a liqht receiving section 92b.
The right prolecting section 92a and the light receiving
section 92b are arranged at positions so as to face each
other with the untwisting space S therebetween. The first
untwisting section 40A and the second untwisting section
40B have simirar configurations with each other. Next, the
first untwisting section 40A wirt be described as an
example.
The first sensor 90 is arranged in the side of the
introduction opening 4OAa of the yarn end yA in the first
untwisting section 40A. The first sensor 90 is arranged
downstream of the injection hole 44 in a direction where
the untwisting air frows in the untwisting space s. The
second sensor 92 is arranged downstream of the first sensor
90 in the direction where the untwisting air flows. rn
other words, the injection hole 44, the first sensor 90 and
the second sensor 92 are arranged in this order from the
side of the introduction opening 4OAa in the first
untwistinq section 40A.
The first sensor 90 and the second sensor 92 are
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adapted to detect the yarn end yA. when the yarn end yA
is positioned between the light projecting section 90a and
the light receiving section 90b (between the riqht
projecting section 92a and the riqht receiving section 92b),
the first sensor 90 outputs a detection signar. The first
sensor 90 and the second sensor 92 each outputs the
detection signar to a determining section 19 of the contro]
section 16.
As irlustrated in FrG. 4, the control section 16
incl-udes the determining section 19. The determining
section 19 is adapted to determine whether or not the yarn
end YA has been untwisted in the first untwisting secti_on
40A. After receiving the detection resurts (monitoring
resurts) output from the first sensor 90 and the second
sensor 92, the determining section 19 determines based on
the detection results, whether or not the yarn end yA has
been untwisted. Specificarly, based on a rength of the yarn
end YA before a start of untwisting and a rength of the yarn
end YA of when the untwisting of the yarn end yA ends, the
determining section 19 determines whether or not the yarn
end YA has been untwisted.
As irlustrated in FrG. 58, in a case where the yarn
end YA is detected by the first sensor 90 and the yarn end
YA is not detected by the second sensor 92, Lhe determining
section 19 determines that the yarn end yA has been
untwisted without an abnormarity. on the other hand, as
illustrated in FrG. 5A, in a case where the yarn end yA is
not detected by the first sensor 90, the determining section
19 det.ermines that the yarn end yA has not been untwisted
(in other words, a defect has occurred in the untwisting) .
Furthermore, as il-rustrated in FrG. 5c, in a case where the
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yarn end YA is detected by the second sensor 92, the
determining section 19 determines that the yarn end yA has
been excessively untwisted (in other words, the defect has
occurred in the untwisting) . rn a case where the yarn end
YA is continuously detected by the second sensor 92 for a
predetermined period of time, the determining section 19
determines that the yarn end yA has been excessively
untwisted. That is, in a case where the yarn end yA is
detected by the second sensor 92 one time for ress than the
predetermined perlod of time, the determining section 19
determines that fibers have fl-own from the yarn end yA, for
example.
In a case where after the yarn end yA is continuously
detected by the second sensor 92 for the predetermined
period of time, the yarn end YA is detected onry by the first
sensor 90, the determining section 19 determines that a tip
end of the yarn end YA has flown and the yarn end yA has
been excessively untwisted.
rn a case of determining that the defect has occurred
in the untwisting of the yarn end yA, the determining
section 19 outputs an alarm signal to the dispray section
18, notifying that the defect has occurred. After
receiving the al-arm signar output from the determining
section L9, the dispray section 1B is adapted to perform
a display i-ndicating that the defect has occurred in the
untwisting of the yarn end yA (an unt.wisting state of the
yarn end YA is not favorabre) . At this time, an ararm tone
may be sounded with the dispray in the dispray section 18.
when the alarm signar is output from the determining section
79, the control section 16 stops a yarn spricing operation
in the yarn splicing device 19. Since a configuration of
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the second untwisting section 40B is similar to a
configuration of the first untwisting section 4OA, a
description of the second untwisting section 4oB wirr be
omitted.
Referring back to FIG. 2, under a state where the yarn
end YA from the upper side is being gripped by the first
gripping section 50A and the yarn end yB from the l_ower side
is being gripped by the second gripping section 50B, the
yarn spricing 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 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 respectively
drawn from the first untwistrng section 4oA and the second
untwisting section 40B by the yarn drawing Ievers 81, and
tip-end portions of the yarn end YA and the yarn end yB are
held in proximity to the yarn splicing section 5o by the
twist stopping levers 82.
IOperations of yarn splicing device] Next,
operations of the above-described yarn spricing device 10
(that is, a yarn splicing method performed in the yarn
splicing device 10) wiII be described.
As illustrated in FIG. 2, since the yarn drawing
revers B1 swing to a side of the first untwisting section
40A and the second untwisting section 40B, the yarn end yA
from the upper side that has been guided by the upper-yarn
guiding device 12 and the yarn end yB from the rower side
that has been guided by the lower-yarn catching device j
are drawn to the side of the first untwisting section 40A
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and the second untwisting section 40B. Accordingly, the
yarn end YA from the upper side is introduced to the guide
groove 21a of the first guide plate 21, the guide groove
22a of the second guide plate 22, and a yarn splicing nozzLe
51 of the yarn splicing section 50. Similarly, the yarn
end YB from the lower side is introduced to the guide groove
2lb of the first guide plate 21, the guide groove 22b of
the second guide plate 22, and the yarn splicing nozzle 51
of the yarn splicing section 50. When being introduced to
the yarn splicing nozzle 57, the yarn end YA from the upper
side and the yarn end YB from the Iower side are arranqed
in an accommodating section 52 vla a guide inclined portion
53.
Subsequently, the yarn end YA from the upper side that
has been introduced to the guide groove 2la of the first
guide plate 21 is gripped in proximity to the guide groove
27aby the first gripping section 60A. SimiIarIy, the yarn
end YB from the l-ower side that has been introduced to the
guide groove 22b of the second guide pLate 22 is gripped
in proxlmity to the guide groove 22b by the second gripping
section 50B. Then, the yarn end YA from the upper side that
has been introduced to the guide groove 22a of the second
guide plate 22 ts cut in proximity to the guide groove 22a
by the first cutting section 70A under the state of being
gripped by the first gripping section 60A. SimiIarIy, the
yarn end YB from the lower side that has been introduced
to the guide groove 2lb of the first guide plate 21 is cut
in proximity to the guide groove 21b by the second cutting
section 70B under the state of being gripped by the second
gripping section 608.
Subsequently, by the first untwisting section 40A
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injecting the untwisting air from the injection hole 44 into
an untwisting nozzte 43, the yarn end yA from the upper side
that has been cut by the first cutting section 70A is
introduced to and then untwisted by the first untwisting
section 40A under the state of being gripped by the first
gripping section 50A (an untwisting process) . Similarly,
by the second untwisting secti-on 4 oB in; ecting the
untwisting air from the injection hore 44 into an untwisting
nozzle 43, the yarn end yB from the rower side that has been
cut by the second cutting section 7oB is introduced to and
then untwisted by the second untwistj-ng section 40B under
the state of being gripped by the second gripping section
608 (the untwisting process)
At this time, the yarn end yA, yB is detected by the
first sensor 90 and the second sensor 92 (a monitoring
process) . Based on the detection resurts output from the
first sensor 90 and the second sen sor 92, the determining
section 19 determines whether or not the yarn end yA, yB
has been untwisted (a determinati-on process) . when the
determining section 19 has determined that the untwisting
of the yarn end YA, YB is favorably being performed, the
operation is continued. on the other hand, when the
determining section 19 has determined that the defect has
occurred in the untwisting of the yarn end yA, yB, an alarm
is disprayed in the dispray section 18. simurtaneously,
the yarn splicing operation in the yarn spricing device 1o
is stopped by the contro1 section 16.
After the untwisting of the yarn end yA, yB is
respectivery performed by the first untwisting section 4oA
and the second untwisting section 4oB, by the yarn drawing
revers B1 further swinging to the side of the first
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untwisting section 4oA 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
.l-ower side is drawn from the second untwisting sect.ion 40B.
Then, the tip-end portion of the yarn end yA from the upper
side and the tip-end portion of the yarn end yB from the
l-ower side are herd in proximity to the yarn spricing
sectlon 50 by the twist stopping l-evers B2 that have swung
together with the yarn drawing levers 81. Then, by the yarn
spricing section 50 injecting yarn splicing air from an
in;ection hole 54 into the accommodating section 52, the
yarn end YA from the upper side that has been untwisted by
the first untwisting section 4oA and the yarn end yB from
the rower side that has been untwisted by the second
untwisting section 40B are twisted together (a yarn
splicing process). At this time, the yarn end yA from the
upper side is being gripped by the first gripping section
60A, and the yarn end yB from the rower side is being grlpped
by the second gripping section 608.
Subsequently, the yarn drawing levers g1 and the
twist stopping l-evers 82 are swung to an opposite side of
the first untwisting section 4oA and the second untwisting
section 40B, and the first gripping section 5oA and the
second gripping section G0B release the gripping.
Accordingry, the yarn y connected by splicing the yarn end
YA from the upper side and the yarn end yB from the rower
side returns to the yarn path at a front side of the yarn
splicing device 10.
IEffects] As described above, in the yarn spicing
device 10, the first sensor 90 and the second sensor 92 are
provided in each of the first untwisting section 40A and
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the second untwisting section 40B. The first sensor 90 and
the second sensor 92 detect a position of the yarn end yA
in the untwisting space s of the first untwisting section
40A. The first sensor 90 and the second sensor 92 detect
a position of the yarn end YB in the untwisting space s of
the second untwisting section 40B. Based on the detection
results from the first sensors 90 and the second sensors
92, the determining section 19 determines an untwisting
state of the yarn end YA, YB, that is, whether or not the
yarn end YA, YB has been untwisted. Accordingly, in the
yarn splicing device 10, the defect in the untwisting of
the yarn end YA, YB can be detected.
In the present embodiment, in the direction where the
untwisting air flows, the first sensor 9o and the second
sensor 92 are arranged downstream of the injection hore 44
adapted to inject the untwisting air. Accordingly, in the
yarn splicing device 10, fibers can be prevented from
adhering to or accumulating in the Iiqht prolecting
sections 90a, 92a and the light receiving sections 90b, g2b
by the untwisting air. Thus, in the yarn spricing device
10, detection accuracy of the yarn end yA, yB can be
prevented from decreasing.
In the present embodiment, the yarn splicing device
10 includes the first sensors 9o and the second sensors 92.
The first sensor 90 and the second sensor 92 are arranged
in this order from the side of the introduction opening 4OAa
of the yarn end YA in the first untwisting section 4oA.
simirarry, the first sensor 9o and the second sensor 92 are
arranged in this order from the side of the introduction
opening 4OBa of the yarn end yB in the second untwisting
section 40B. Accordingly, in a case where the yarn end yA,
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YB is not detected by the first sensor 90, the determining
section 19 of the winding unit 1 determines that the yarn
end YA, YB has not been untwisted. fn addition, in a case
where the yarn end YA, YB is detected by the second sensor
92, the determining section 19 of the winding unit 1
determines that the yarn end YA, yB have been excessively
untwisted. Thus, in the winding unit l, a determination
can be favorably made whether or not the yarn end yA, yB
has been untwisted.
fn the present embodiment, in a case of determining
that the defect has occurred in the untwisting of the yarn
end YA, YB, the determining section 19 outputs the al-arm
signar to the display section 18, notifying that the defect
has occurred, and the display section 1B performs the
dispray indicating that the defect has occurred in the
untwisting of the yarn end YA, YB (the untwisting state is
not favorabfe) . Accordingly, in the automatic winder
provided with the yarn spricing device 10, the defect of
the untwisting has occurred in the yarn spricing device 10
of which winding unit 1 can be easily specified.
One embodiment of the present invention has been
described, but the present invention is not limited to the
above-described embodiment. Eor example, in the
above-described embodiment, the first sensor 9l and the
second sensor 92 are provided as the untwisting monitoring
section, but a configuration of providing either of the
first sensor 91 or the second sensor 92 may be employed.
rn the configuration of providing onry either of the first
sensor 90 or the second sensor 92, in a case where the sensor
is arranged at a position of the first sensor 90, a detection
can be made whether or not the yarn end yA, yB has been
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untwisted, and in a case where the sensor is arranged at
a position of the second sensors 92, a detection can be made
whether or not the yarn end YA, YB has been excessively
untwi sted .
Furthermore, in addition to the above-described
embodiment, a configuration of providing a third sensor may
be employed. The third sensor is arranged further
downstream of the second sensor 92 in the direction where
the untwisting air fl-ows. The third sensor is adapted to
detect flbers that have flown by the untwisting. fn a case
where after the yarn end YA, YB is continuously detected
by the second sensor 92 for the predetermined period of time,
flown fibers are detected by the third sensor and the yarn
end YA, YB is detected only by the first sensor 90, a
determining section determines that the tip-end portion of
the yarn end YA, YB has been flown and that the yarn end
YA, YB has been excessively untwisted.
A yarn splicing device may incl_ude only the third
sensor. At this time, based on an amount of the yarns
(fibers) that have flown from a start of untwisting of the
yarn end YA, YB until the untwisting of the yarn end yA,
YB ends, the determining section determines whether or not
the yarn end YA, YB has been untwisted. In a case where
flown fibers are not detected at aII, for example, the
determining section 19 determines that the yarn end yA, yB
has not been untwisted. In a case where the flown fibers
are detected, the determining section 19 determines that
the yarn end YA, YB has been untwisted. Furthermore, in
a case where the frown fibers are detected a predetermined
or more number of times, for example, the determining
section 19 determines that the yarn end yA, yB has been
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excessively untwisted.
rn the above-described embodiment, a transmissive
optical sensor is employed as the first sensor 90 and the
second sensor 92, but an untwisting monitoring section may
be a refrective opticar sensor or the rike, for exampre.
rn the above-described embodiment, the untwisting
states are determined by detecting the position of the yarn
end YA in the untwi-sting space s of the first untwisting
section 40A and the position of the yarn end yB in the
untwisting space s of the second untwisting section 40B.
However, for exampre, dfl image or a video picture of the
yarn end YA, YB that has been respectivery introduced to
each untwisting space S of the first untwisting section 4oA
and the second untwisting section 40B may be obtained, and
then the untwisting state of the yarn end yA, yB may be
determined based on the image or the video picture.
rn the above-described embodiment, a configuration
in which the in;ection hole 44 adapted to inject the
untwisting air is provided in each of the first untwisting
section 40A and the second untwisting section 40B is
described as one exampre, but a form of injecting the
untwisting air may be another. FrG. 6 is a diagram
irrustrating a sectional structure of an untwisting section
according to another embodiment. As irrustrated in FrG.
6, untwisting air is injected from a side of an introduction
mouth 41Aa of an untwisting pipe 43A to an untwisting
section 47 by an air in;ecting section 44A adapted to
function as a part of the untwisting section 41. A form
of in;ection of the untwisting air is not rimited in
particular.
In the yarn splicing device, the untwisting section
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is provided with the untwisting monitoring section adapted
to monitor the untwisting state of the yarn. Accordingry,
in the yarn splicing device, the untwisting state of the
yarn itserf can be recogni-zed. rn the yarn spricing device,
a defect in the untwisting of the yarn can thus be detected.
consequentry, in the yarn spricing device, the defect can
be prevented from occurring in a spliced portion of the
yarn.
rn one embodiment, the untwisting section includes
a space to which the yarn end is introduced, and compressed
air is suppried to the space. The untwisting monitoring
section may monitor the untwisting state of the yarn end
in the space. Accordingly, in the yarn spricing device,
the untwisting state of the yarn end can be monitored at
a position where the yarn end is untwisted. rn the yarn
splicing device, the defect in the untwisting of the yarn
can thus be detected during or immediatery after an
untwisting operation.
rn one embodiment, the untwisting section is provided
with an injection hore adapted to inject the compressed air
to the space. The untwisting monitoring section may be
arranged downstream of the injection hole in a direction
in which the compressed air injected from the injection hole
frows. Accordingly, in the yarn spricing device, fibers
can be prevented from adhering to or accumurating in the
untwisting monitoring section by the compressed air. rn
the yarn spricing device, detection accuracy of the yarn
end in the untwisting monitoring section can be prevented
from decreasing.
rn one embodiment, the untwisting monitoring section
may be an opticar sensor including a right projecting
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section and a light receiving section. Accordingly, in the
yarn splicing device, a posj_tion of the yarn end can be
detected without making contact with the yarn end.
In one embodiment, a plurality of the Iight
projecting sections and a plurality of the light receiving
sections may be arranged in the directi-on in which the
compressed air fl-ows in the untwisting section. when the
yarn end is untwisted with the compressed air in the
untwisting sectj-on, a Iength of the yarn end becomes Iong.
In the yarn splicing device, since the plurality of Iight
projecting sections and the plurality of light receiving
sections are provided, for example, dn untwisting state
where the yarn end is not untwisted, that is, a state where
the yarn end is not stretched, or an excessive untwisting
state where the yarn end is excessively untwisted, that is,
a state where the yarn end is excessivery stretched can be
detected. fn the yarn splicing device, the defect in the
untwisting of the yarn end can thus be favorabry detected.
A winding unit of the present invention includes the
above-described yarn splicing device, a yarn supplying
section adapted to enabl-e a yarn to be supptied, a winding
section adapted to wind the yarn, a first guiding section
adapted to catch a yarn end from the yarn supprying section
and to guide the yarn end to the yarn splicing device, and
a second guiding section adapted to catch a yarn end from
the winding section and to quide the yarn end to the yarn
splicing device.
The winding unit incrudes the above-described yarn
splicing device. Accordingly, in the winding unit, the
yarn ends can be prevented from being spliced together under
a state where the defect has occurred in the untwisting of
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the yarn end. Therefore, in the winding unit, since the
yarn having the defect in a spriced portion thereof can be
prevented from being wound in the winding section, quarity
of the yarn wound in the winding section can be maintained.
fn one embodiment, the winding unit further incfudes
a contror section adapted to control operations of the
untwisting section, the yarn splicing section, the first
guiding section and the second guiding section. The
control section incrudes a determining section adapted to
determine based on a monitoring resurt of the untwisting
monitoring section, whether or not the yarn end has been
untwisted, and when a determination is made by the
determining section that the defect has occurred in the
untwisting of the yarn end, a yarn splicing operation in
the yarn spllcing device may be stopped. Accordingly, in
the winding unit, the yarn end that has been insufficiently
untwisted can be prevented from being spticed.
In one embodiment, based on a length of the yarn end
before a start of the untwisting and a length of the yarn
end of when the untwisting ends, the determining section
may determine whether or not the yarn end has been untwisted.
Accordingry, in the windlng unit, the determination can be
accuratery made whether or not the yarn end has been
untwisted.
In one embodi-ment, based on an amount of yarns flown
from a start of the untwisting of the yarn end until the
untwisting of the yarn end ends, the determining section
may determine whether or not the yarn end has been untwisted.
Accordingry, in the winding unit, the determination can be
accuratery made whether or not the yarn end has been
untwisted.
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A textire machine of the present. invention incrudes
the above-described winding unit, an upper-contror section
adapted to controf each contror section of the winding units,
and a display section adapted to dispray an operationar
status of the winding unit. when the determination is made
by the determini-ng section that the defect has occurred in
the untwisting of the yarn end, the display section performs
display accordingly.
rn the textile machine, when a determlnation is made
by the determining section that the defect has occurred in
the untwisting of the yarn end, the dispray section performs
dispray accordingry. consequently, l-n the textire machine,
the defect in the untwisting has occurred in the yarn
spricing device of which winding unit can be easily
specified.
The yarn splicing method of the present invention for
splicing yarn ends together incfudes an untwi-sting process
of introducing the yarn ends of yarns that have been
disconnected and untwisting the yarn ends, a yarn spricing
process of twistlng the yarn ends together that have been
untwisted in the untwisting process, a monitoring process
of monitoring an untwisting state of the yarn end in the
untwisting processf and a determination process of
determlning based on a monitoring result of the untwisting
state of the yarn end in the monitoring process, whether
or not the yarn end has been untwisted. When a
determination is made in the determination process that a
defect has occurred in the untwisting of the yarn end, a
yarn splicing operation is stopped.
The yarn spricing method incrudes the determination
process of determining based on the monitoring resul-t of
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the untwisting state of the yarn end in the monitoring
process, whether or not the yarn end has been untwisted,
and when the determination is made that the defect has
occurred in the untwisting of the yarn end. the yarn
splicing operation is stopped. Accordingly, in the yarn
spricing method, the yarn end that has been insufficientry
untwisted can be prevented from being spriced. rn the yarn
spricing method, a yarn of which spriced portion is weak
or a yarn of which spriced portion having poor appearance
can thus be prevented from beinq wound, thereby arrowi_ng
prevention of deterioration in quality.
fn one embodiment, in the determination process,
based on a rength of the yarn end before a start of the
untwisting and a length of the yarn end of when the
untwisting ends, the determination may be made whether or
not the yarn end has been untwisted. Accordingry, in the
yarn splicing method, the determination can be accuratery
made whether or not the yarn end has been untwisted.
In one embodiment, in the determination process,
based on an amount of yarns flown from a start of the
untwisting of the yarn end until the untwisting of the yarn
end ends, the determination may be made whether or not the
yarn end has been untwisted. Accordingly, in the yarn
spricing method, the determination can be accuratery made
whether or not the yarn end has been untwisted.
With the present invention, the defect
untwisting of the yarn can be detected.
in the
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Vrle CIaim:
1. A yarn spliclng device adapted to splice yarn ends
together, comprising:
an untwisting section adapted to introduce thereto,
the yarn ends of yarns that have been disconnected and to
untwj-st the yarn ends; and
a yarn splicing section adapted to t.wist the yarn ends
together that have been untwisted by the untwisting
sections,
wherein the untwisting section is provided with an
untwisting monitoring section adapted to monitor an
untwisting state of the yarn end.
2. The yarn splicing device according to claim 1,
wherein the untwisting section incrudes a space to which
the yarn end is introduced, and compressed air is suppried
to the space, and
the untwisting monitoring section is adapted to
monitor the untwisting state of the yarn end in the space.
3. The yarn splicing device according to claim 2,
wherein the untwisting section is provided with an
injection hole adapted to inject the compressed air to the
space, and
the untwisting monitoring section is arranged
downstream of the injection hore in a direction in which
the compressed air injected from the injection hol-e frows.
4. The yarn spricing device according to craim 2 or
craim 3, wherein the untwisti-ng monitoring section is an
opticar sensor including a right prolecting section and a
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light receiving section.
5. The yarn splicing device according to claim 4,
wherein a plurality of the light projecting sections and
a prurarity of the right receiving sections are arranged
in the direction in which the compressed air flows in the
untwisting section.
6. A winding unit comprising:
the yarn splicing device according to any one of claim
1 through cl-aim 5;
a yarn supplying section adapted to enable a yarn to
be supplied;
a winding section adapted to wind the yarn,.
a first guiding section adapted to catch a yarn end
from the yarn supplying section and to guide the yarn end
to the yarn splicing device; and
a second guiding section adapted to catch a yarn end
from the winding section and to guide the yarn end to the
yarn splicing device.
1. The winding unit according to claim 6, further
comprising a contror section adapted to contror operations
of the untwisting section, the yarn splicing section, the
first guiding section and the second guiding section,
wherein the control section incrudes a determining
section adapted to determine based on a monitoring resurt
of the untwisting monitoring section , whether or not Lhe
yarn end has been untwisted, and
when a determination is made by the determining
section that a defect has occurred in untwisting of the yarn
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end, a yarn splicing operation in the yarn splicing device
is stopped.
8. The winding unit according to claim 7, wherein
based on a length of the yarn end before a start of the
untwisting and a length of the yarn end of when the
untwisting ends, the determining section is adapted to
determine whether or not the yarn end has been untwisted.
9 . The winding unit accordlng to claim 7, wherein
based on an amount of yarns flown from a start of the
untwisting of the yarn end until the untwisting of the yarn
end ends, the determining section is adapted to determine
whether or not the yarn end has been untwisted.
10. A textile machine comprising:
the winding unit according to any one of claim 1
through claim 9;
an upper control section adapted to control each
control section of the winding units;
a display section adapted to display an operational
status of the winding unit,
wherein when the determination is made by the
determining section that the defect has occurred in the
untwisting of the yarn end, the display section is adapted
to perform a display indicating that the defect has occurred
in the untwisting of the yarn end.
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together
A yarn splicing method for splicing yarn ends
comprising:
untwisting process of introducing the yarn ends
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of yarns that have been dj-sconnected and untwisting the yarn
ends;
a yarn splicing process of twisting the yarn ends
together that have been untwisted in the untwj_sting
process;
a monitoring process of monitoring an untwisting
state of the yarn end in the untwisting process; and
a determination process of determining based on a
monitoring result of the untwisting state of the yarn end
in the monitoring process, whether or not the yarn end has
been untwisted,
wherein when a determination is made in the
determinat.ion process that a defect has occurred in
untwisting of the yarn end, a yarn splicing operation is
stopped.
12. The yarn splicing method according to claim 11,
wherein in the determination process, based on a length of
the yarn end before a start of the untwisting and a length
of the yarn end of when the untwisting ends, the
determination is made whether or not the yarn end has been
untwisted.
13. The yarn splicing method according to claim 11,
wherein in the determination process, based on an amount
of yarns fl-own from a start of the untwisting of the yarn
end until the untwisting of the yarn end ends, the
determination is made whether or not the yarn end has been
untwisted.