DESCRIPTION
YARN PULL-OUT DEVICE, YARN WINDING DEVICE, AND YARN JOINING METHOD
TECHNICAL FIELD
[0001] The present invention relates mainly to a yarn pull-out device that pulls out a yarn from 5 rom a
winding part.
BACKGROUND ART
[0002] A yarn pull-out device is conventionally known that pulls out a yarn end of a package for
10 performing yarn joining or the like. The yarn pull-out device includes a wound yarn catch and
guide device and a detection part. The wound yarn catch and guide device sucks and catches the
yarn from the package. The detection part detects the yarn caught by the wound yarn catch and
guide device. By detecting the yarn by the detection part (or after a predetermined time elapsed
from detection) the wound yarn catch and guide device allows the sucking and catching operation to
15 be completed. Patent Documents 1 and 2 disclose this kind of a yarn pull-out device.
[0003] A yarn pull-out device of Patent Document 1 has a suction nozzle that catches a yarn of a
package. This suction nozzle is configured to swing. A sensor (detection part) is provided within
a suction port of a distal end of a suction nozzle. Patent Document 2 also discloses that a yarn
pull-out device has a sensor (detection part) provided at a distal end of a suction mouth that catches a
20 yarn of a package.
PRIOR-ART DOCUMENTS
PATENT DOCUMENTS
[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 1997-31769
3
Patent Document 2: Japanese Unexamined Utility Model Application Publication No.
1991-102562
SUMMARY OF THE INVENTION
PROBLEMS TO BE SOLVED BY THE INVENTI5 ON
[0005] Wiring for the supply of electricity and the input/output of data are connected to a detection
part for detecting a yarn. Thus, when the detection part is attached to a wound yarn catch and guide
device that is movable, it is necessary to devise the attaching position and the length of wiring and
the like so that the wound yarn catch and guide device can move. Even when the attaching position
10 of wiring is devised, loading on wiring is less likely to be prevented. Then, a short lifetime of
wiring cannot be prevented. Particularly, a yarn pull-out device in Patent Document 1 significantly
involves the above-described problem because a detection part is attached in the farthest position
from a pivot shaft (the position at which a movement distance is the largest).
[0006] A detection part is arranged in a part having a short movement distance (near the pivot shaft
15 or downstream side), and thereby the above-described problem can be reduced. In this case,
however, it takes a long time until a wound yarn catch and guide device catches and detects a yarn.
This leads to an increase in a time for such as the yarn joining.
[0007] The present invention has been made in view of the circumstances described above, and a
primary object of the present invention is to provide a yarn pull-out device capable of quickly
20 detecting a pulled out yarn without applying load on wiring of a detection part for detecting a yarn
pulled out from a package.
MEANS FOR SOLVING THE PROBLEMS AND EFFECTS THEREOF
[0008] Problems to be solved by the present invention are as described above, and next, means for
4
solving the problems and effects thereof will be described.
[0009] In a first aspect of the present invention, a yarn pull-out device that pulls out a yarn from a
winding part for winding the yarn to form a package is provided. That is, the yarn pull-out device
includes a wound yarn catch and guide device and a detection part. The wound yarn catch and
guide device has a move and catch part that moves from a waiting position to a catching position 5 on in
the winding part side, sucks and catches a wound yarn that is a yarn in the winding part side. The
detection part detects a wound yarn caught by the wound yarn catch and guide device. The move
and catch part approaches the detection part by moving from the waiting position to the catching
position. The detection part detects the presence or absence of the wound yarn within the move and
10 catch part that is moved to the catching position.
[0010] Accordingly, the detection part is arranged at the different position from the move and catch
part. Thereby, no load is applied to wiring that is connected to the detection part even when the
move and catch part is moved. Consideration for load applied to wiring is not necessary and
therefore the wound yarn can be detected at any position.
15 [0011] It is preferable that the yarn pull-out device is configured as follows. That is, the detection
part includes a light emitting part and a light receiving part. The light emitting part emits light
toward a detecting position within the move and catch part. The light receiving part receives light
which is reflected at the detecting position from emitted light from the light emitting part or which is
passed through the detecting position from emitted light from the light emitting part. A light
20 passing part for passing through light emitted from the light emitting part is provided in the move
and catch part.
[0012] Accordingly, a light sensor is adopted for a detection part and thereby a wound yarn within
a move and catch part can be easily detected from outside of the move and catch part.
[0013] It is preferable that the yarn pull-out device is configured as follows. That is, the move and
5
catch part includes a suction port and a pipe part. The suction port approaches an outer
circumferential surface of the package and sucks a yarn end of the package. The pipe part is
connected to the suction port. The wound yarn catch and guide device further includes a shaft part
as a reference point when the suction port approaches the package. The light passing part is
provided in the pipe 5 part.
[0014] Accordingly, a position at which a wound yarn passes through is likely to be assumed in the
pipe part as compared with the suction port. This can achieve a high accuracy of detection. The
light passing part is provided on the pipe part located on the suction port side relative to the shaft part
and therefore the yarn end can be detected at an early stage. This can improve the efficiency of
10 winding.
[0015] In the yarn pull-out device, it is preferable that the inside of the pipe part has a guide portion
for guiding a wound yarn sucked by the suction port to the detecting position.
[0016] Accordingly, the wound yarn is guided to the detecting position and therefore the accuracy
of detection is improved. Particularly, even when the distance between a suction port and a
15 package is changed, a wound yarn can be detected accurately.
[0017] In the yarn pull-out device, it is preferable that the light passing part is a clear plate provided
in at least a part of the pipe part.
[0018] Accordingly, leakage of negative pressure out of the pipe part can be prevented. This can
prevent a decrease of sucking power and also prevent a sucked wound yarn from going out of the
20 light passing part.
[0019] In the yarn pull-out device, it is preferable that the light passing part is a notch having a
through hole provided in at least a part of the pipe part.
[0020] Accordingly, the detection part can directly detect a wound yarn within the move and catch
part. This can improve the accuracy of detection.
6
[0021] It is preferable that the yarn pull-out device is configured as follows. That is, the suction
port is a slit-like opening that extends parallel to a rotation axis direction of the package. The pipe
part includes a cylindrical portion and a connecting portion. The cylindrical portion has an air
passage having a circular cross-section. The connecting portion is connected to the end of the
cylindrical portion. The cross-section shape of the cylindrical portion is changed from a circula5 r
shape to a slit shape in order to connect the cylindrical portion and the opening. The light passing
part is provided in the connecting portion side of the cylindrical portion.
[0022] Accordingly, a light passing part is provided at a position kept out of a connecting portion.
This can improve the accuracy of detection. Moreover, the light passing part is provided on a side
10 close to the suction port in the cylindrical portion. This can further shorten a detection time of a
wound yarn.
[0023] In the yarn pull-out device, it is preferable that the light passing part is provided at a
circumferential surface of the cylindrical portion, the circumferential surface in a side opposed to the
detection part when the wound yarn catch and guide device catches a wound yarn.
15 [0024] Accordingly, the light passing part is opposed to the detection part when the move and catch
part moves to a catching position. This can achieve a simple layout. The light passing part is still
opposed to the detection part even when the catching position of the move and catch part is slightly
changed due to a package in a lump. This can detect a wound yarn without any troubles.
[0025] In the yarn pull-out device, it is preferable that a reflection part, which is located inside the
20 cylindrical portion and reflects a emitted light, is provided in a side opposite to the light passing part
across the detecting position.
[0026] Accordingly, the wound yarn is detected using the reflection light and thereby even colored
wound yarn can be detected accurately.
[0027] In the yarn winding device, it is preferable that the detection part is attached to the winding
7
part.
[0028] Accordingly, a detection part is arranged in a winding part, and thereby the distance
between the detection part and a package decreases. This can detect whether the wound yarn is
caught by a move and catch part or not, at an early stage.
[0029] It is preferable that the yarn winding device is configured as follows. That is, the ya5 rn
winding device further includes a yarn feed part and a yarn joining device. The yarn feed part has a
yarn for being wound by the winding part. The yarn joining device performs the yarn joining of a
wound yarn and a yarn in the yarn feed part side when the yarn is disconnected between the winding
part and the yarn feed part. The yarn pull-out device guides the wound yarn to the yarn joining
10 device.
[0030] Accordingly, a time required for the yarn joining can be shortened. Additionally, the
minimum required wound yarn is sucked and then a yarn in a package-side is guided to a yarn
joining device. This can minimize the amount of yarn which is cut and removed at a time of yarn
joining.
15 [0031] In the yarn winding device, the detection part is preferably attached to a metal part of the
winding part.
[0032] This can allow the detection part to be grounded and dissipate heat.
[0033] It is preferable that the yarn winding device is configured as follows. That is, the winding
part includes a support part, an auxiliary roller, a driving source, a traverse mechanism and a power
20 transmission mechanism. The support part rotatably supports a package. The auxiliary roller
assists the winding of yarn while coming in contact with the package and thereby the package is
accordingly rotated. The auxiliary roller is rotated by the driving source. The traverse mechanism
traverses a yarn. The power transmission mechanism transmits driving force generated from the
driving source to the package, in a state where the package is away from the auxiliary roller, and
8
thereby the package is rotated.
[0034] Accordingly, a yarn of a package can be caught in a state where the package is away from
the auxiliary roller, and therefore a yarn is not stuck to the package. This can reduce the probability
of the failure of catching a yarn. Additionally, using a power transmission mechanism can achieve
a configuration at the lower cost, as compared with a configuration provided a driving sourc5 e
separately. Furthermore, a rotation speed of a package, a rotation direction and the like can be
controlled by controlling the driving source.
[0035] In a second aspect of the present invention, a yarn joining method performed by the yarn
winding device is provided. That is, the yarn joining method includes a catching step, a detecting
10 step, a waiting step and a guiding step. In the catching step, a sucking and catching operation, in
which the wound yarn catch and guide device approaches the package and then the package is
rotated in the reverse direction from the winding direction in order to catch a wound yarn, is
performed. In the detecting step, the wound yarn catch and guide device detects sucking and
catching of the wound yarn. In the waiting step, the sucking and catching operation is continued
15 until a setting time elapses from the detection of sucking and catching of the wound yarn. In the
guiding step, the wound yarn is guided to the yarn joining device after the waiting step is completed.
[0036] Accordingly, the amount of the wound yarn appropriate for being guided to the yarn joining
device can be sucked and caught. This can suppress the amount of yarn wasted at a time of yarn
joining.
20 [0037] It is preferable that, the yarn joining method further includes a yarn defect sucking and
waiting step, which further waits until a yarn defect is sucked by the wound yarn catch and guide
device after the waiting step.
[0038] Accordingly, the yarn defect sucking and waiting step for removing a yarn defect is further
performed. This can prevent the yarn defect from remaining on a package.
9
BRIEF DESCRIPTION OF THE DRAWINGS
[0039] [FIG. 1] A front elevational view of an automatic winder according to an embodiment of the
present invention.
[FIG. 2] A side view of a winding 5 unit.
[FIG. 3] An enlarged side view and an enlarged plan view showing a winding part and a
yarn pull-out device therearound.
[FIG. 4] An enlarged perspective view showing a winding part and a yarn pull-out device
therearound.
10 [FIG. 5] A diagram showing a pattern of a detection part.
[FIG. 6] A cross-sectional perspective view and a cross-sectional view of a pipe part in an
upper yarn catch and guide device.
[FIG. 7] An enlarged side view showing the first half of the operation of a winding part at a
time of catching an upper yarn.
15 [FIG. 8] An enlarged side view showing the latter half of the operation of a winding part at a
time of catching an upper yarn.
[FIG. 9] A flowchart showing the process at a time of sucking and catching a yarn from a
package and guiding to a yarn joining device.
[FIG. 10] An enlarged plan view for explaining an example of the position of a contact
20 roller.
[FIG. 11] An enlarged side view showing a first modification of a winding part.
[FIG. 12] An enlarged plan view showing a second modification of a winding part.
EMBODIMENT FOR CARRYING OUT THE INVENTION
10
[0040] Next, an automatic winder according to an embodiment of the present invention will be
described with reference to the drawings. Fig. 1 is a front elevational view showing a schematic
configuration of an automatic winder 1 according to this embodiment.
[0041] As shown in Fig. 1, an automatic winder (yarn winding device) 1 mainly includes a plurality
of winding units 10 arranged side by side, a machine controller 12, and a doffing device 5 13.
[0042] The machine controller 12 can communicate with each of the plurality of winding units 10.
An operator of the automatic winder 1 operates the machine controller 12 appropriately and thereby
manages the plurality of winding units 10 collectively.
[0043] Each of the winding units 10 is configured to unwind a yarn 14 from a yarn feed bobbin 16,
10 and wind on a wound bobbin 19 while traversing the yarn 14. In the above-described manner, the
winding unit 10 forms a package 22.
[0044] Each of the winding units 10 includes a unit control section 50 on one side of the yarn feed
bobbin 16, the package 22 and the like (a right side of Fig. 1). The unit control section 50 includes,
for example, a CPU and a ROM. A program for controlling each configuration of the winding units
15 10 is stored in the ROM. The CPU executes the program stored in the ROM.
[0045] When the package 22 reaches full winding (a state where the prescribed amount of yarn is
wound) in each of the winding units 10, a doffing device 13 travels to a position of each of the
winding units 10, removes the full winding package and sets an empty bobbin 19.
[0046] Next, a configuration of a winding unit 10 will be described with reference to Fig. 2. As
20 shown in Fig. 2, the winding unit 10 includes a yarn feed part 15 and a winding part 17.
[0047] The yarn feed part 15 holds a yarn feed bobbin 16, which is placed on a transport tray (not
shown), at a predetermined position. This can appropriately unwind the yarn 14 from the yarn feed
bobbin 16. The type of the yarn feed part 15 is not limited to a transport tray type. For example, a
magazine type may be used.
11
[0048] The winding part 17 mainly includes a cradle (support part) 18, a wound bobbin 19 and a
winding drum (auxiliary roller) 20.
[0049] The cradle 18 has a pair of a rotation support portions. The cradle 18 can rotatably support
the wound bobbin 19 (or a package 22) by tucking the wound bobbin 19 at the rotation support
portion. The cradle 18 is configured to switch between a state where a supported package 22 c5 omes
in contact with the winding drum 20 and a state where the package 22 is moved away from the
winding drum 20.
[0050] The winding drum 20 traverses the yarn 14 onto a surface of the package 22, and also drives
the package 22 to rotate. The winding drum 20 is driven in rotation by a drum drive motor (driving
10 source) 21. The winding drum 20 is driven in rotation while being in contact with an outer
circumference of the package 22, and thereby the package 22 can be accordingly rotated. A
traverse groove (traverse mechanism) having a spiral shape is provided in an outer circumferential
surface of the winding drum 20. The yarn 14 wound from a yarn feed bobbin 16 is wound on a
surface of a package 22 while being traversed in a constant width by the traverse groove. This can
15 form the package 22 having the constant winding width. Other members arranged in the winding
part 17 will be described later.
[0051] Each of the winding units 10 has an unwinding assist device 25, a tension applying device
27, a yarn joining device 38 and a clearer 40 arranged in this order from a yarn feed part 15 side, in a
yarn travel path between the yarn feed part 15 and the winding part 17. An upper yarn catch and
20 guide device (wound yarn catch and guide device) 30 and a lower yarn catch and guide device 34 are
arranged near the yarn joining device 38. In the following description, an upstream side and a
downstream side with respect to a travel direction of the yarn 14 may be simply referred to as
“upstream side” and “downstream side”.
[0052] The unwinding assist device 25 includes a restricting member 26 that is able to overlie a
12
core tube of a yarn feed bobbin 16. The restricting member 26 having a substantially cylindrical
shape is arranged so as to come in contact with a balloon, which is formed at an upper portion of a
yarn layer of the yarn feed bobbin 16. The balloon is a portion where the yarn 14 unwound from
the yarn feed bobbin 16 is thrown around by the centrifugal force. The restricting member 26 is
brought into contact with the balloon, and therefore the yarn 14 comes in contact with the balloon 5 oon of
the yarn 14. This can prevent the yarn 14 from being excessively thrown around. Thus, the yarn
14 can be unwound from the yarn feed bobbin 16 appropriately.
[0053] The tension applying device 27 applies a predetermined tension to the yarn 14 that is
traveling. In this embodiment, the tension applying device 27 is configured as a gate type in which
10 a movable comb is arranged relative to a fixed comb. The movable comb is driven such that the
combs are brought into an engaged state with each other. The yarn 14 passes while being bent
between the combs having the engaged state, so that an appropriate tension is applied to the yarn 14.
This can improve the quality of a package 22. The tension applying device 27 is not limited to the
above-described gate type. For example, a disk type tension applying device can also be used.
15 [0054] The yarn joining device 38 performs yarn joining between the yarn 14 (lower yarn) in a yarn
feed part 15 side and the yarn 14 (upper yarn, wound yarn) in a winding part 17 side when the yarn
14 is disconnected between the yarn feed part 15 and the winding part 17 for some reason. In this
embodiment, the yarn joining device 38 is configured as a splicer device for twisting yarn ends
together using a swirl air stream generated by compressed air. The yarn joining device 38 is not
20 limited to the above-described splicer device. For example, a knotter of machine type can also be
used.
[0055] The upper yarn catch and guide device 30 catches an upper yarn when the yarn 14 is
disconnected. The upper yarn catch and guide device 30 includes a shaft part 31, a pipe part 32 and
a suction port 33. The pipe part 32 can be rotated around the shaft part 31 (a reference point when
13
the suction port 33 approaches a package 22) from a waiting position (a solid line in Fig. 2) of the
yarn feed part 15 side to a catching position (a dot-dash line in Fig. 2) of the winding part 17 side, by
the control of a unit control section 50 The upper yarn catch and guide device 30 is connected to a
negative pressure source (not shown), and generates suction stream in the suction port 33. In this
configuration, the suction port 33 catches the upper yarn at the catching position and returns to 5 the
waiting position. This can guide the upper yarn to the yarn joining device 38. In this manner, the
pipe part 32 and the suction port 33 of the upper yarn catch and guide device 30 move and catch the
yarn 14, and therefore the pipe part 32 and the suction port 33 are collectively referred to as a move
and catch part 30a. In this embodiment, an end portion of the suction port 33 at one side is
10 extended, and effects thereby will be described later.
[0056] The lower yarn catch and guide device 34 includes a shaft part 35, a pipe part 36 and a
lower yarn catch suction port 37, similarly to the upper yarn catch and guide device 30. The lower
yarn catch suction port 37 can shift around the shaft part 35 and also generate suction stream,
similarly to the suction port 33. In this configuration, the lower yarn catch and guide device 34 can
15 catch a lower yarn and guide it to a yarn joining device 38.
[0057] The clearer 40 has a sensor (not shown). The clearer 40 monitors a yarn thickness signal
from the sensor, and thereby detects a yarn defect such as a slab. A cutter 41 is provided near the
clearer 40, for immediately cutting the yarn 14 when the clearer 40 detects a yarn defect. The
detection results by the sensor may be analyzed in a processing unit within the clearer 40, or may be
20 analyzed in the unit control section 50.
[0058] As a result of the above, the winding unit 10 can wind the yarn 14 on the wound bobbin 19
and form the package 22.
[0059] Next, members included in the winding part 17 will be described with reference to Fig. 3.
[0060] As shown in Fig. 3, the winding part 17 includes not only a winding drum 20, a package 22
14
or the like, but also an air stream ejection part 60, a contact roller (power transmission mechanism)
64 and a detection part 68. A configuration having an upper yarn catch and guide device 30 and the
detection part 68 is referred to as a yarn pull-out device 28.
[0061] The air stream ejection part 60 includes air passages 61 for passing compressed air, and
nozzles 62 for ejecting compressed air passed through the air passages 61. The nozzles 62 a5 re
arranged at both ends in a winding shaft direction of the package 22, as shown in Fig. 3 (b). Each
of the nozzles 62 can eject air stream toward the center portion of the package 22.
[0062] Accordingly, for example, even when the yarn 14 is located at an end portion in the winding
shaft direction while separating the package 22 from the winding drum 20, air stream allows the yarn
10 14 to move into the center portion in the winding shaft direction. This can prevent cob-webbing.
[0063] A surface of a contact roller 64 is made of a soft material (for example, a rubber material
such as NBR). The contact roller 64 is a member for rotating the package 22 in a reverse direction
by a drum drive motor 21. The contact roller 64 is rotatably connected to one end portion of a first
link part 65. Accordingly, the contact roller 64 can be shifted around another end portion of the
15 first link part 65 as a rotation shaft. A second link part 66 is rotatably connected to a middle portion
of the first link part 65. The second link part 66 is movable by means of driving force of solenoid,
air cylinder or the like.
[0064] In this configuration, the second link part 66 is pulled toward the left side of Fig. 3 (a), as
shown in Fig. 8 (a) described later, and thereby the contact roller 64 comes in contact with the
20 winding drum 20 and the package 22. In this state, the drum drive motor 21 is driven in the rotation
direction during a winding operation, and thereby the package 22 can rotate in a reverse direction.
[0065] Although any material can be used for the contact roller 64, adoption of a soft material as
described in this embodiment can prevent damages of the package 22 and the winding drum 20.
[0066] The detection part 68 is configured as a light sensor and determines success or failure in
15
catching the yarn 14 of the package 22 by the suction port 33. The detection part 68 is fixed to the
winding part 17 with an appropriate member (details thereof will be described later) and maintained
at a constant position irrespective of the rotation of the winding drum 20 and the shifting of the
suction port 33.
[0067] The pipe part 32 of an upper yarn catch and guide device 30 has a light passing pa5 rt
(detection window) 69. The light passing part 69 is configured in a manner such that, for example,
the recess provided on the surface of the pipe part 32 serves as a transparent plate (a material for
passing light, such as acryl or polycarbonate). The light passing part 69 may be flat not forming the
recess by cutting out the surface of the pipe part 32 and arranging the transparent plate alternatively.
10 A configuration without the transparent plate may be adoptable. When the transparent plate is
arranged, leakage of negative pressure from the pipe part 32 can be prevented. This can prevent the
reduction of the suction force. On the other hand, when the transparent plate is not arranged, the
detection part 68 can detect a yarn 14 directly. This can improve the accuracy of detection.
[0068] The detailed description of the detection part 68 and the pipe part 32 will be given with
15 reference to Fig. 4 to Fig. 6. As shown in Fig. 4, the winding part 17 includes a detection part
mounting plate 81 and a winding part support plate 82.
[0069] The detection part 68 is mounted near an end portion of the front side of the detection part
mounting plate 81. The detection part mounting plate 81 is fixed to the winding part support plate
82 with a bolt or the like near an end portion of the back side. The detection part mounting plate 81
20 and the detection part 68 are supported by the winding part support plate 82.
[0070] The winding part support plate 82 is a metal member for supporting peripheral parts of the
winding drum 20. The winding part support plate 82 that is made of metal enables the detection
part 68 to be grounded and enables heat to be dissipated. The winding part support plate 82 can
support not only the detection part 68 but also other parts. Thereby, a special part for supporting
16
the detection part 68 is not required. This can suppress an increase of the number of parts.
[0071] As shown in Fig. 5 (a), the detection part 68 of this embodiment includes a light emitting
part 68a and a light receiving part 68b. The light emitting part 68a emits light toward a position
where a yarn 14 is passed within the pipe part 32 (detecting position). The light receiving part 68b
receives light that is emitted by the light emitting part 68a and reflected by the yarn 14. T5 he
detection part 68 determines the presence or absence of the yarn 14 depending on the intensity of
light that is received by the light receiving part 68b. That is, when the light receiving part 68b
receives light having the predetermined intensity or more, the detection part 68 determines that the
yarn 14 is present (the yarn 14 is caught by a move and catch part 30a successfully).
10 [0072] Any configuration may be adoptable for the detection part 68. For example, a
configuration shown in Fig. 5 (b) to Fig. 5 (d) may be adoptable.
[0073] In an example shown in Fig. 5 (b), the pipe part 32 has a reflection plate 32d within the side
opposite to the detection part 68 (the side opposite to the detection part 68 (light passing part 69)
across a detecting position). In the example shown in Fig. 5 (b), the light receiving part 68b
15 receives light after light emitted by the light emitting part 68a is reflected by the reflection plate 32d.
Here, in a case that the yarn 14 is present within the pipe part 32, light is shielded by the yarn 14.
Thereby, the intensity of light received by the light receiving part 68b is reduced. In this manner,
the detection part 68 determines the presence or absence of the yarn 14 (success or failure in catching
the yarn 14). By using light shielding of the yarn 14 instead of light reflection by the yarn 14, it is
20 possible to perform above determination even when the yarn is a colored yarn that absorbs light
(particularly, black yarn).
[0074] In an example shown in Fig. 5 (c), light is reflected by means of the inside surface of the
pipe part 32 instead of the reflection plate 32d. This can determine the presence or absence of the
yarn 14 in a simple configuration although the accuracy of detection of the yarn 14 is reduced.
17
[0075] In Fig. 5 (b) and Fig. 5 (c), the light emitting part 68a and the light receiving part 68b are
perpendicular to the longitudinal direction of the yarn 14, however, they may be arranged along the
longitudinal direction of the yarn 14. In this case, the yarn 14 shields not only light emitted by the
light emitting part 68a but also light reflected by the reflection plate 32d. This leads to a great
reduction in the intensity of light. Therefore, the accuracy of determination of the presence 5 or
absence of the yarn 14 can be improved.
[0076] In an example shown in Fig. 5 (d), the light emitting part 68a and the light receiving part
68b are arranged across the light passing part 69 (detecting position) of the pipe part 32. Light
emitted by the light emitting part 68a is directly received by the light receiving part 68b after the
10 yarn 14 shields light. Accordingly, similarly to the case of Fig. 5 (b) and Fig. 5 (c), using light
shielding by the yarn 14 can determine the presence or absence of the yarn 14. In a configuration of
Fig. 5 (d), the cost can be reduced since a reflection plate is not required, and the labor of cleaning
the reflection plate can be saved.
[0077] The detection part 68 is not limited to a light sensor as long as the yarn 14 within the pipe
15 part 32 is detected. Although a touch sensor or the like may also be used, using the light sensor can
easily detect the yarn 14 from the outside.
[0078] Next, details of the pipe part 32 and the light passing part 69 will be described. As shown
in Fig. 4, the pipe part 32 has a cylindrical portion 32a and a connecting portion 32b. The
cylindrical portion 32a is a portion in a shaft part 31 side and has an air passage having a
20 circular-shaped cross-section. The connecting portion 32b is connected to an end portion on the
suction port 33 side of the cylindrical portion 32a. The cross-section shape of the connecting
portion 32b is changed from circular to slit in order to connect the cylindrical portion 32a and the
suction port 33. The suction port 33 is a slit-like opening that extends parallel to the rotation shaft
direction of the package 22.
18
[0079] In this embodiment, the light passing part 69 is provided on the cylindrical portion 32a of
the pipe part 32, to be more specific, on the connecting portion 32b side of the center portion of the
cylindrical portion 32a. Thus, the light passing part 69 is provided on the side close to the suction
port 33 of the cylindrical portion 32a. This can reduce time until the yarn 14 is detected. Since
the connecting portion 32b has a wide width, the position where the yarn 14 passes through depen5 ds
on the portion where the suction port 33 catches the yarn 14. Therefore, the light passing part 69 is
provided at the position behind the connecting portion 32b, and thereby reduction of the accuracy of
detection of the yarn 14 can be prevented.
[0080] As shown in Fig. 4, the light passing part 69 is opposed to the detection part 68 when the
10 suction port 33 is located at the catching position. This can achieve a natural and simple layout.
The light passing part 69 is still opposed to the detection part 68 even when the catching position of
the suction port 33 is changed slightly due to the package 22 being in a lump. This can detect the
yarn 14 without any troubles.
[0081] In Patent Document 1 and 2, a detection part is provided in a suction port in order to quickly
15 detect a yarn sucked and caught by the suction port. However, this configuration puts a burden on
wiring that is extended from the detection part each time the suction port shifts, and then wiring is
deteriorated. Another configuration, where the detection part is provided at a shaft part 31 or
further inside of the shaft part 31 (sucking direction downstream side as an opposite side of the
suction port), is conventionally known. However, in this configuration, a yarn is not detected until
20 the yarn sucked and caught by the suction port reaches the shaft part. This involves problems of
increasing in a detection time, a waste of yarn and a yarn joining time.
[0082] In this respect, in the configuration of this embodiment, success or failure in catching a yarn
14 can be determined without putting a burden on wiring because a position of a detection part 68 is
fixed. The light passing part 69 uncovers the inside of the pipe part 32 (particularly, upstream side
19
of sucking direction) when the suction port 33 is located at the catching position. This can quickly
detect the presence or absence of the yarn 14, as compared with a configuration in which the
detection part 68 is provided in the shaft part 31.
[0083] As shown in Fig. 6, a guide portion 32c is arranged within the pipe part 32 (cylindrical
portion 32a). The guide portion 32c is a plate-like member and arranged on an upstream side in 5 a
sucking direction of a light passing part 69. The guide portion 32c is arranged so as to slightly
incline relative to a vertical cross-section of the cylindrical portion 32a (such that a side farther from
the suction port 33 is located at the sucking direction upstream side). The guide portion 32c
includes a first guide portion 321 and a second guide portion 322.
10 [0084] The first guide portion 321 is provided near an inner edge of a side farther from the suction
port 33 (a side opposite to the light passing part 69). The first guide portion 321 sucks the yarn 14
sucked by the suction port 33 and guides to the second guide portion 322.
[0085] The second guide portion 322 is provided in a side near the suction port 33 (near the light
passing part 69). A recess is formed in the second guide portion 322 and thereby guides the yarn 14.
15 This can improve the accuracy of detection of the yarn 14.
[0086] In a case that a recess is formed in the light passing part 69 and a transparent plate is not
arranged in a notch, the positional relationship between the detection part 68 and the light passing
part 69 is adjusted such that at least a part of the detection part 68 penetrates the light passing part 69
when the suction port 33 catches a yarn of the package 22 (see Fig. 8 (a)). Accordingly, success or
20 failure in catching the yarn 14 can be determined at the position near the suction port 33. As
described above, in a case that such as a transparent plate is arranged in a notch, the yarn 14 can be
detected with the sufficient accuracy of detection.
[0087] Next, an operation of the winding part 17 when the suction port 33 catches the yarn 14 of
the package 22 will be described with reference to Fig. 7 to Fig. 9. The following description of the
20
operation is merely an illustrative example, a part of the process order may be changed and some
processes may be simultaneously performed. A part of the process may be omitted and an other
process may be added.
[0088] Fig. 7 (a) shows a state during a winding operation by the winding part 17. At this time,
the contact roller 64 does not come in contact with neither the wound bobbin 19 nor a winding 5 drum
20.
[0089] After that, in a case that the yarn 14 is disconnected when a yarn defect is detected by the
clearer 40 and the yarn 14 being cut by the cutter 41 (in a case of Yes in S101), the unit control
section 50 winds the yarn 14 of the winding part 17 side into the package 22 and drives the cradle 18,
10 and thereby the package 22 is moved away from the winding drum 20 (a state shown in Fig. 7 (b)).
The unit control section 50 ejects air stream from the nozzle 62 of the air stream ejection part 60
toward the center portion in a winding shaft direction of the package 22. This can prevent
cob-webbing. Moreover, the unit control section 50 allows the move and catch part 30a (the pipe
part 32 and the suction port 33) to swirl from the waiting position to the catching position in order to
15 catch the yarn 14 of the package 22 (S102, catching step).
[0090] Next, the unit control section 50 drives the second link part 66 by a solenoid or the like, and
thereby the contact roller 64 is moved in contact with the package 22 and the winding drum 20 (a
state shown in Fig. 8 (a)). Accordingly, driving force of the drum drive motor 21 can be
transmitted to the package 22 via the winding drum 20 and the contact roller 64. The contact roller
20 64 enables a reverse rotation of the package 22 without changing the rotation direction of the
winding drum 20. The contact roller 64 may come in contact after a rotation speed is reduced to
some extent, in order to prevent damages of the package 22 and the winding drum 20.
[0091] The unit control section 50 generates suction stream in the suction port 33 that is located
near the package 22 before and after a reverse rotation of the package 22. Accordingly, the suction
21
port 33 can catch the yarn 14 of the package 22.
[0092] In this embodiment, the package 22 is away from the winding drum 20. This can prevent
the yarn 14 from sticking to the package 22, and improve the probability of catching of the yarn 14.
The suction port 33 is located between the package 22 and the winding drum 20, and thereby the
yarn 14 can be surely caught. Moreover, in the suction port 33 of this embodiment, an edge port5 ion
located at the winding drum 20 side is extended. This can further improve the probability of
catching of the yarn 14.
[0093] As described above, the move and catch part 30a approaches the detection part 68 by
shifting to the catching position. Therefore, the yarn 14 caught by the suction port 33 is detected by
10 the detection part 68 via the light passing part 69. This can check success or failure in catching the
yarn 14 at an early stage. When the move and catch part 30a is shifted (moved) to the catching
position, it is assumed that “the move and catch part 30a approaches the detection part 68” even in
any state, where the move and catch part 30a is standing still before the detection part 68, the move
and catch part 30a comes in contact with the detection part 68, and the detection part 68 is located
15 within the move and catch part 30a.
[0094] Next, the unit control section 50 determines whether the detection part 68 detects the yarn
14 or not (S103, detecting step). The unit control section 50 performs a first waiting process (S104,
waiting step) and a second waiting process (S105, yarn defect sucking and waiting step) when the
detection part 68 detects the yarn 14. The sucking and catching operation of the suction port 33 is
20 continued during the first waiting process and the second waiting process.
[0095] The first waiting process is a process that continues to suck a predetermined amount of the
yarn 14, in order to prevent being out of (being not enough) the yarn 14 when the yarn 14 is guided
to the yarn joining device 38 by shifting the move and catch part 30a toward the lower side. The
second waiting process is a process that continues to suck a predetermined amount of the yarn 14, in
22
order to remove a yarn defect detected by the clearer 40 after sucking (in order to prevent a yarn
defect from remaining in the package 22).
[0096] The unit control section 50 releases a sucking and catching operation and guides the yarn 14
to the yarn joining device 38 after the first waiting process and the second waiting process (S106).
[0097] The unit control section 50 allows a lower yarn catch and guide device 34 to shift and ca5 tch
a lower yarn, simultaneously with catching of an upper yarn, and guide it to the yarn joining device
38. After that, the yarn joining device 38 performs yarn joining between the upper yarn and the
lower yarn, and thereby a winding operation is restarted (a state shown in Fig. 8 (b)).
[0098] Next, a position for arranging the contact roller 64 and an effect depending on the position
10 will be described with reference to Fig. 10.
[0099] The contact roller 64 is preferably arranged at an end portion, not the center portion in a
winding shaft direction, so as not to disturb catching of the yarn 14 by the suction port 33. The
contact roller 64 is arranged at an end portion (position A or position C) on a side opposite to the unit
control section 50 among end portions in the winding shaft direction. Thereby, a space is formed
15 around the contact roller 64 and the contact roller 64 is positioned at a near side. This can facilitate
a mounting/dismounting operation of the contact roller 64.
[0100] The contact roller 64 can be arranged in a front side of the device or a back side of the
device. In a case of arranging the contact roller 64 in the front side of the device (position A or
position B), a space is formed around the contact roller 64 although catching of the yarn 14 by the
20 suction port 33 is slightly disturbed. This can facilitate the mounting/dismounting operation of the
contact roller 64. In a case that the contact roller 64 is arranged in the front side of the device, as
shown in Fig. 8 (a), the contact roller 64 comes in contact with the package 22 and the winding drum
20 such that the contact roller 64 is meshed with the package 22 and the winding drum 20.
Therefore, the contact roller 64 surely comes in contact with the package 22 and the winding drum
23
20.
[0101] On the other hand, in a case of arranging the contact roller 64 in the back side of the device
(position C or position D), catching of the yarn 14 by the suction port 33 is not disturbed at all
although the mounting/dismounting operation of the contact roller 64 is difficult due to a small space
around the contact roller 5 64.
[0102] Therefore, it is preferable that an optimum position is selected depending on such as the
positional relationship of the winding part 17, the form of the suction port 33 and the like.
[0103] Next, a first modification of the above-described embodiment will be described with
reference to an enlarged side view of Fig. 11. In a description of the first and second modifications,
10 members identical or similar to those of the above-described embodiment will be denoted by the
same corresponding reference signs on the drawings, and a description thereof may be sometimes
omitted.
[0104] The above-described embodiment is a configuration having one contact roller 64, however,
the first modification is a configuration having three contact rollers 64. Also in a configuration
15 having three contact rollers 64, as shown in Fig. 11, the contact rollers 64 enable a reverse rotation of
the package 22 without changing a rotation direction of the winding drum 20. Therefore, the
odd-number of the contact rollers 64 is preferable.
[0105] Next, a second modification of the above-described embodiment will be described with
reference to an enlarged plan view of Fig. 12.
20 [0106] In the above-described embodiment and the first modification, driving force of the drum
drive motor 21 is transmitted to the package 22 by the contact roller 64. In the second modification,
driving force of the drum drive motor 21 is transmitted to the package 22 by a support part relaying
power transmission mechanism (power transmission mechanism) 70 via the cradle 18 (in more detail,
the rotation support portion). Each part of the support part relaying power transmission mechanism
24
70 will be described as follows.
[0107] The support part relaying power transmission mechanism 70 includes a power transmission
shaft 71, a belt 72, a power transmission shaft 73, a gear 74, a gear 75, a clutch 76 and a power
transmission shaft 77.
[0108] The power transmission shaft 71 is a rotation shaft of the winding drum 20 and rota5 table
integrally with the winding drum 20. Driving force transmitted to the power transmission shaft 71
is transmitted to the power transmission shaft 73 via the belt 72. The power transmission shaft 71
and the power transmission shaft 73 have same rotation direction due to the transmission via the belt
72.
10 [0109] Driving force transmitted to the power transmission shaft 73 is transmitted to the clutch 76
via the gear 74 mounted to the power transmission shaft 73 and the gear 75 meshes with the gear 74.
The power transmission shaft 73 rotates in a reverse direction relative to the power transmission
shaft 71 or the like because the gear 75 meshes with the gear 74.
[0110] The clutch 76 can switch between a state where the transmitted driving force is transmitted
15 to the power transmission shaft 77 and a state where the transmitted driving force is not transmitted
to the power transmission shaft 77. The power transmission shaft 77 is configured to rotate
integrally with a rotation support portion for rotatably supporting the package 22. The power
transmission shaft 77 rotates in the same direction as the gear 75 (in a reverse direction relative to the
power transmission shaft 71), and thereby the package 22 is rotated in a reverse direction relative to
20 the winding drum 20.
[0111] In the above-described manner, driving force of the drum drive motor 21 can be transmitted
to the package 22. The clutch 76 allows the package 22 to quickly rotate in a reverse direction.
This can reduce time of yarn joining or the like and improve the efficiency of winding. A support
part relaying power transmission mechanism 70 of the second modification is merely illustrative, and
25
there are appropriately changeable components.
[0112] As described above, the above-described yarn pull-out device 28 includes an upper yarn
catch and guide device 30 and a detection part 68. The upper yarn catch and guide device 30 has a
move and catch part 30a that moves from a waiting position to a catching positon in the winding part
17 side, sucks and catches a wound yarn of a yarn in the winding part 17 side. The detection par5 t
68 detects a wound yarn caught by the upper yarn catch and guide device 30. The move and catch
part 30a approaches the detection part 68 by moving from the waiting position to the catching
position (that is, the detection part 68 is provided in a position other than the position of the move
and catch part 30a). The detection part 68 detects the presence or absence of the wound yarn within
10 the move and catch part 30a moved to the catching position.
[0113] Accordingly, even if the move and catch part 30a is moved, a burden is not put onto wiring
connected to the detection part 68 since the detection part 68 is arranged in a position that differs
from the move and catch part 30a. Moreover, a wound yarn can be detected at a position near a
suction port 33 of the move and catch part 30a because consideration for a burden on wiring is
15 unnecessary. This can reduce time of yarn joining.
[0114] In another aspect of the present invention, the winding part 17 of an automatic winder (yarn
winding device) 1 of this embodiment includes a cradle (supporting part) 18, a winding drum
(auxiliary roller) 20, a drum drive motor (driving source) 21, a traverse groove (traverse mechanism)
of the winding drum 20 and a power transmission mechanism (a contact roller 64 or a support part
20 relaying power transmission mechanism 70). The cradle 18 rotatably supports the package 22.
The winding drum 20 comes in contact with the package 22 and assists in winding a yarn 14, and
thereby the package 22 is accordingly rotated. The winding drum 20 is rotated by the drum drive
motor 21. The traverse groove is for traversing the yarn 14. In a state where the package 22 is
away from the winding drum 20, the power transmission mechanism transmits driving force
26
generated from the drum drive motor 21 to the package 22 and thereby the package 22 is rotated.
[0115] Accordingly, the yarn 14 does not stick to the package 22 since the yarn 14 of the package
22 can be caught in a state where the package 22 is away from the winding drum 20. This can
reduce the probability of failure in catching the yarn 14. Using the power transmission mechanism
enables to achieve the cost reduction, as compared with a configuration having a drum drive mot5 or
21 separately. Moreover, a rotation speed, a rotation direction of the package 22 and the like can be
controlled by controlling the drum drive motor 21.
[0116] In the above-described embodiment and the first modification, the power transmission
mechanism is the contact roller 64. The contact roller 64 transmits driving force generated from the
10 drum drive motor 21 to the package 22 and thereby the winding drum 20 is rotated by coming in
contact with a surface of the winding drum 20.
[0117] Accordingly, driving force by which the winding drum 20 is rotated can be transmitted to
the package 22 with a simple configuration.
[0118] In the above-described automatic winder 1, the contact roller 64 is in contact with a surface
15 of the winding drum 20 and a surface of the package 22. This can transmit driving force by which
the drum 20 is rotated to the package 22.
[0119] Accordingly, even in a case that the contact roller 64 has a small diameter and a short length,
driving force by which the winding drum 20 is rotated can be transmitted to the package 22.
[0120] In the above-described automatic winder 1, the contact roller 64 comes in contact with a
20 surface of an end portion in a winding shaft direction.
[0121] Accordingly, the contact roller 64 can be arranged in a position where catching of a yarn
end of the package 22 is not disturbed.
[0122] The above-described automatic winder 1 includes a unit control section (control part) 50
which controls at least the winding part 17 and is arranged in one side of a winding shaft direction of
27
the package 22. The contact roller 64 comes in contact with a surface of one end portion side,
where the unit control section 50 is not arranged, of both end portions in the winding shaft direction
of the package 22.
[0123] Accordingly, there is a space since the unit control section 50 (a casing of the unit control
section 50) is not located near the contact roller 64. This allows to easily mount/dismount t5 he
contact roller 64.
[0124] In the above-described automatic winder 1, it is preferable that the contact roller 64 comes
in contact with a surface in a device’s front side of the package 22.
[0125] Accordingly, there is a space since wiring or the like does not exist near the contact roller 64.
10 This allows to easily mount/dismount the contact roller 64.
[0126] In the above-described automatic winder 1, the contact roller 64 may come in contact with a
surface of a back side of the device of the package 22.
[0127] Accordingly, the contact roller 64 can be arranged in a position where catching the yarn 14
is not disturbed since the yarn 14 is normally caught in a device’s front side of the package 22.
15 [0128] In the above-described automatic winder 1, an odd-number of the contact rollers 64 (for
example, one contact roller 64) is preferably arranged.
[0129] Accordingly, the package 22 is rotated in a reverse direction without changing the rotation
direction of the winding drum 20.
[0130] In the above-described automatic winder 1, a portion where the contact roller 64 comes in
20 contact with the package 22 is made of soft material.
[0131] This can prevent damages of a surface of the package 22 and the winding drum 20.
[0132] In the second modification, a power transmission mechanism is a support relaying power
transmission mechanism 70 which transmits driving force of the drum drive motor 21 to the package
22 via a cradle 18 (in more detail, a rotation support portion).
28
[0133] Accordingly, driving force can be transmitted such that a surface of the package 22 and the
winding drum 20 does not come in contact with the contact roller 64. This can prevent damages of
a surface of the package 22.
[0134] In the above-described automatic winder 1, the support part relaying power transmission
mechanism 70 includes a clutch 76 which can switch transmission and non-transmission of drivi5 ng
force from the drum drive motor 21.
[0135] Accordingly, for example, the package 22 is quickly rotated in a reverse direction. This
can reduce time of yarn joining or the like and improve the efficiency of winding.
[0136] In the above-described configuration, in a state where the package 22 is away from the
10 winding drum 20, a space formed thereby includes an air stream ejection part 60 which ejects air
stream from an end portion in a winding shaft direction of the package 22 toward the center portion
of the package 22.
[0137] This can prevent cob-webbing, and thereby the probability of failure in catching the yarn 14
of the winding part 17 side can be further reduced.
15 [0138] The above-described automatic winder 1 includes a yarn feed part 15, a yarn joining device
38 and an upper yarn catch and guide device (yarn catch and guide device) 30. The yarn feed part
15 has a yarn feed bobbin 16 in which the yarn 14 for being wound by the winding part 17 is wound.
The yarn joining device 38 joins the yarn 14 of the winding part 17 side with that of the yarn feed
part 15 side when the yarn 14 is disconnected between the winding part 17 and the yarn feed part 15.
20 The upper yarn catch and guide device 30 catches the yarn 14 of the winding part 17 side and guides
to the yarn joining device 38.
[0139] Accordingly, in a configuration of the present invention, a continuous catching of the yarn
14 can be prevented due to the low probability of failure in catching the yarn 14. Therefore, the
high efficiency of winding can be achieved.
29
[0140] The above-described automatic winder 1 includes a detection part 68 which determines
success or failure in catching an upper yarn by the upper yarn catch and guide device 30. The
detection part 68 is fixed to the winding part 17 and then detects the presence or absence of the yarn
14 within the upper yarn catch and guide device 30 when the upper yarn catch and guide device 30
catches the upper ya5 rn.
[0141] Accordingly, success in catching the upper yarn can be immediately detected and thereby a
suction port 33 is quickly moved toward the yarn joining device 38 side. Therefore, time of yarn
joining can be reduced and the efficiency of winding can be improved.
[0142] In the above-described automatic winder 1, the upper yarn catch and guide device 30
10 includes a suction port 33 which sucks and catches a yarn of the winding part 17 side at a location
between the package 22 and the winding drum 20. A part of end portions of the suction port 33 is
extended. The extended part is located in the winding drum 20 side at a time of catching a yarn of
the winding part 17 side.
[0143] This can further reduce the probability of failure in catching a yarn of the winding part 17
15 side.
[0144] While some preferred embodiments and modifications of the present invention have been
described above, the above-described configurations can be changed, for example, as follows.
[0145] In the above-described configurations, the contact roller 64 comes in contact with the
package 22 and the winding drum 20. Instead of the package 22, a member for rotating integrally
20 with the package 22 (a wound bobbin 19, a power transmission shaft 77 or the like) may be
adoptable. Also, instead of the winding drum 20, a member rotating integrally with the winding
drum 20 (power transmission shaft 71 or the like) may be adoptable.
[0146] Although the above description shows that a traverse is performed by the winding drum 20
having a traverse groove, a traversing device of arm type, belt type or rotary type is adoptable. In
30
this case, a roller without a traverse groove may be used as an auxiliary roller.
[0147] The present invention is not limited to an automatic winder, but also applied to another yarn
winding device such as a rewinding machine and a fine spinning machine (for example, an air
spinning machine or an open end spinning machine).
5
DESCRIPTION OF THE REFERENCE NUMERALS
[0148] 1 automatic winder
28 yarn pull-out device
30 upper yarn catch and guide device (wound yarn catch and guide device)
10 30a move and catch part
31 shaft part
32 pipe part
32a cylindrical portion
32b connecting portion
15 32c guide portion
32d reflection plate
33 suction port
50 unit control section
68 detection part
20 68a light emitting part
68b light receiving part
69 light passing part
31
WE CLAIM:
1. A yarn pull-out device for pulling out a yarn from a winding part that winds the yarn to form a
package comprising:
a wound yarn catch and guide device including a move and catch part for sucking a5 nd
catching a wound yarn that is a yarn in the winding part side by moving from a waiting position to a
catching position in the winding part side; and
a detection part for detecting the wound yarn caught by the wound yarn catch and guide
device;
10 the move and catch part that approaches the detection part by moving from the
waiting position to the catching position,
the detection part that detects the presence or absence of the wound yarn inside the
move and catch part moved to the catching position.
15 2. The yarn pull-out device according to claim 1, wherein
the detection part includes:
a light emitting part for emitting light to a detecting position within the move and
catch part; and
a light receiving part for receiving light that is emitted by the light emitting part and
20 reflected at the detecting position, or that is emitted by the light emitting part and passed through the
detecting position,
a light passing part at which light emitted by the light emitting part is passed through is
provided in the move and catch part.
32
3. The yarn pull-out device according to claim 2, wherein
the move and catch part includes:
a suction port for sucking a yarn end of the package by approaching an outer
circumferential surface of the package; and
a pipe part connected to the 5 suction port,
the wound yarn catch and guide device further includes a shaft part as a reference point
when the suction port approaches the package,
the light passing part is provided on the pipe part.
10 4. The yarn pull-out device according to claim 3, wherein
a guide portion for guiding a wound yarn that is sucked by the suction port to the detecting
position is provided within the pipe part.
5. The yarn pull-out device according to claim 4, wherein
15 the light passing part is a transparent plate provided in at least a part of the pipe part.
6. The yarn pull-out device according to claim 4, wherein
the light passing part is a notch provided in at least a part of the pipe part so as to penetrate
through the pipe part.
20
7. The yarn pull-out device according to claims 5 or 6, wherein
the suction port is a slit-like opening that extends parallel to a rotation axis direction of the
package,
the pipe part includes:
33
a cylindrical portion having a circular cross-section to which an air passage is
formed; and
a connecting portion connected to an end portion of the cylindrical portion, the
connecting portion having a cross-section of which changes from circular to slit in order to connect
the cylindrical portion and the opening5 ,
the light passing part is provided on the connecting portion side of the cylindrical portion.
8. The yarn pull-out device according to claim 7, wherein
the light passing part is provided on a circumferential surface of the cylindrical portion, the
10 circumferential surface on a side opposed to the detection part when the wound yarn catch and guide
device catches a wound yarn.
9. The yarn pull-out device according to claim 8, wherein
a reflection part for reflecting a emitted light is provided within the cylindrical portion, on a
15 side opposed to the light passing part across the detecting position.
10. A yarn winding device including the yarn pull-out device and the winding part according to any
one of claims 1 to 9, wherein
the detection part is mounted to the winding part.
20
11. The yarn winding device according to claim 10, further comprising:
a yarn feed part for arranging a yarn for being wound by the winding part; and
a yarn joining device for joining a wound yarn with a yarn on the yarn feed part side when
the yarn is disconnected between the winding part and the yarn feed part,
34
wherein
the yarn pull-out device guides the wound yarn to the yarn joining device.
12. The yarn winding device according to claims 10 or 11, wherein
the detection part is mounted to a metal part of the winding part5 .
13. The yarn winding device according to any one of claims 10 to 12, wherein
the winding part includes:
a support part for rotatably supporting a package;
10 an auxiliary roller for assisting a yarn winding while coming in contact with the
package, and causing the package to be accordingly rotated;
a driving source for causing the auxiliary roller to be rotated;
a traverse mechanism for traversing a yarn; and
a power transmission mechanism for transmitting a driving force generated from
15 the driving source to the package and thereby rotating the package, in a state where the package is
away from the auxiliary roller.
14. A yarn joining method performed by the yarn winding device according to any one of claims 11
to 13, comprising:
20 a catching step for performing a sucking and catching operation, in which the wound yarn
catch and guide device approaches and then the package is rotated in the reverse direction from the
winding direction, in order to catch a wound yarn;
a detection step for detecting for sucking and catching of the wound yarn by the wound yarn
catch and guide device;
35
a waiting step for continuing the sucking and catching operation until a setting time elapses
from a detection of sucking and catching of the wound yarn; and
a guiding step for guiding the wound yarn to the yarn joining device after completion of the
waiting step.
5
15. The yarn joining method according to claim 14, wherein
a yarn default sucking and waiting step for further waiting until a yarn defect is sucked by
the wound yarn catch and guide device after the waiting step.