BOBBIN SUPPORTING DEVICE AND YARN WINDING MACHINE
BACKGROUND OF THE INVENTION
1. Field of the Invention
5 The present invention mainly relates to a bobbin
supporting device including a cradle adapted to support a
winding bobbin.
2. Description of the Related Art
10 As described in Japanese Unexamined Patent
Publication No. 2013-67478, a yarn winding machine such as
an automatic winder includes a cradle adapted to support
a winding bobbin as one component of the bobbin supporting
device. A pair of bearings is attached to the cradle. The
15 winding bobbin is rotatably gripped so as to be sandwiched
with the pair of bearings. A package drive motor is driven
and the package (winding bobbin) is rotated in this state,
so that the yarn is wound into the package.
Furthermore, the automatic winder includes a lever
20 handle for opening/closing the cradle to attach and detach
the winding bobbin. Vibration generated by the drive of
the package drive motor is transmitted to the lever handle.
Thus, a vibration absorbing member adapted to suppress the
vibration transmitted from the package drive motor is
25 provided on a supporting section of the lever handle.
Japanese Unexamined Patent Publication No.
2013-67478 describes suppressing the vibration transmitted
to the lever handle, but does not describe suppressing the
vibration transmitted to other portions.
30 For example, when the vibration is transmitted to the
portion supporting the cradle (frame of winding unit, or
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the like), the component attached to such a portion may
break, or erroneous operation may occur. In particular,
the generated vibration may become large depending on the
shape of the package, and wear, breakage, and the like of
5 the component may easily occur.
BRIEF SUMMARY OF THE INVENTION
The present invention has been made in view of the
above circumstances, and a main object thereof is to provide
10 a bobbin supporting device and a yarn winding machine having
a configuration in which the vibration generated by the
rotation of the package is less likely to be transmitted
to a member supporting the cradle.
The problems to be solved by the present invention
15 are as described above, and now, the means for solving such
problems will be described.
According to an aspect of the present invention, a
bobbin supporting device having the following
configuration is provided. That is, the bobbin supporting
20 device includes a base member, a cradle, and a rotation
supporting section. The cradle is supported by being
attached to the base member, and includes arms. The
rotation supporting section is attached to the arm and is
adapted to rotatably support a winding bobbin for winding
25 a yarn. The rotation supporting section includes a
rotation member that rotates with the winding bobbin. A
vibration preventing member is provided between the
rotation member and the base member.
According to another aspect of the present invention,
30 a yarn winding machine having the following configuration
is provided. That is, the yarn winding machine includes
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the above-described bobbin supporting device, and a yarn
supplying section adapted to hold a yarn supplying bobbin,
wherein the yarn unwound from the yarn supplying bobbin is
wound around the winding bobbin supported by the rotation
5 supporting section.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view of an automatic winder according
to one embodiment of the present invention;
10 FIG. 2 is a side view of a winding unit;
FIG. 3 is a perspective view illustrating a
configuration of a bobbin supporting device;
FIG. 4 is a cross-sectional view of a first rotation
supporting section;
15 FIG. 5 is a graph illustrating that transmission of
vibration is suppressed by the first rotation supporting
section of the present embodiment;
FIG. 6 is a cross-sectional view of a first swing shaft
attachment section;
20 FIG. 7A is a graph of a comparative example to be
compared with FIG. 7B;
FIG. 7B is a graph illustrating that transmission of
vibration is suppressed by the first swing shaft attachment
section of the present embodiment;
25 FIG. 8 is a cross-sectional view of a coupling area
of a first shaft attachment member and a first coupling
section;
FIG. 9A is a graph of a comparative example to be
compared with FIG. 9B;
30 FIG. 9B is a graph illustrating that transmission of
vibration is suppressed by a second coupling section of the
5 / 38
present embodiment; and
FIG. 10 is a cross-sectional view of the first
rotation supporting section according to another
embodiment.
5
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
An automatic winder according to an embodiment of the
present invention will be described below with reference
to the drawings. FIG. 1 is a front view illustrating a
10 schematic configuration of an automatic winder 1 according
to the present embodiment.
As illustrated in FIG. 1, an automatic winder (yarn
winding machine) 1 includes a plurality of winding units
10 arranged side by side, a machine control device 12, and
15 a doffing device 13 as main components.
The machine control device 12 is configured to be
communicable with each winding unit 10. An operator of the
automatic winder 1 appropriately operates the machine
control device 12 to collectively manage the plurality of
20 winding units 10.
Each of the winding units 10 is configured to unwind
the yarn 14 from a yarn supplying bobbin 16, and wind the
yarn 14 around a winding bobbin 19 while traversing the yarn
14. The winding unit 10 forms a package 22 in the above
25 manner.
Each winding unit 10 includes a unit control section
50 on one side (right side of FIG. 1) of the yarn supplying
bobbin 16, the package 22, and the like. The unit control
section 50 includes, for example, a CPU and a ROM. The ROM
30 stores a program for controlling each section of the winding
unit 10. The CPU executes the program stored in the ROM.
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When the package 22 is fully wound (state in which
prescribed amount of yarn is wound) in each winding unit
10, the doffing device 13 travels to the position of the
relevant winding unit 10, detaches the fully wound package,
5 and sets an empty winding bobbin 19.
Next, with reference to FIG. 2, a description will
be made on a configuration of the winding unit 10. As
illustrated in FIG. 2, the winding unit 10 includes a yarn
supplying section 15 and a winding section 17.
10 The yarn supplying section 15 is configured to hold
the yarn supplying bobbin 16 placed on a conveying tray (not
illustrated) at a predetermined position. Thus, the yarn
14 can be appropriately unwound from the yarn supplying
bobbin 16. The yarn supplying section 15 is not limited
15 to the conveying tray type, and for example, may be a
magazine type.
The winding section 17 includes a cradle 18, a winding
bobbin 19, and a winding drum 20 as main components.
The cradle 18 is attached to a unit frame (base member)
20 11 of the winding unit 10. The cradle 18 rotationally
supports the package 22 so as to sandwich the winding bobbin
19. The cradle 18 is configured to be switchable between
a state of bringing the supporting package 22 into contact
with the winding drum 20 and a state of separating the
25 package 22 from the winding drum 20.
The winding drum 20 is provided to traverse the yarn
14 on the surface of the package 22 and to rotate the package
22. The winding drum 20 is rotationally driven with a drum
drive motor (not illustrated). The package 22 is rotated
30 by driving and rotating the winding drum 20 with the outer
periphery of the package 22 making contact with the winding
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drum 20. A spiral shaped traverse groove is formed on the
outer circumferential surface of the winding drum 20. The
yarn 14 unwound from the yarn supplying bobbin 16 is wound
around the surface of the package 22 while being traversed
5 at a constant width by the traverse groove. The package
22 having a constant wound width is thereby formed. Other
members arranged on the winding section 17 will be described
later.
Each winding unit 10 has a configuration in which an
10 unwinding assisting device 25, a tension applying device
27, a yarn joining device 38, and a clearer 40 are arranged
in this order from the yarn supplying section 15 on a yarn
travelling path between the yarn supplying section 15 and
the winding section 17. Furthermore, an upper yarn
15 catching and guiding device (yarn catching and guiding
device) 30 and a lower yarn catching and guiding device 34
are arranged in proximity to the yarn joining device 38.
In the following description, upstream and downstream in
the travelling direction of the yarn 14 are sometimes simply
20 referred to as “upstream” and “downstream”.
The unwinding assisting device 25 includes a
regulating member 26 that can be placed over a core tube
of the yarn supplying bobbin 16. The regulating member 26
is formed in a substantially tubular shape, and is arranged
25 to make contact with a balloon formed at an upper part of
the yarn layer of the yarn supplying bobbin 16. The balloon
is the portion where the yarn 14 unwound from the yarn
supplying bobbin 16 is swung by centrifugal force. By
bringing the regulating member 26 into contact with the
30 balloon, the tension is applied on the yarn 14 of the balloon,
thus preventing the yarn 14 from being swung in excess. The
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yarn 14 thus can be appropriately unwound from the yarn
supplying bobbin 16.
The tension applying device 27 applies a
predetermined tension on the travelling yarn 14. In the
5 present embodiment, the tension applying device 27 is
configured as a gate type in which movable comb teeth are
arranged with respect to fixed comb teeth. The movable comb
teeth are urged such that the comb teeth mesh with each other.
The yarn 14 is passed between the meshed comb teeth while
10 being bent, to apply an appropriate tension on the yarn 14
and improve the quality of the package 22. However, the
tension applying device 27 is not limited to the gate type
tension applying device, and for example, a disc type
tension applying device may be adopted.
15 The yarn joining device 38 joins the yarn 14 (lower
yarn) from the yarn supplying section 15 and the yarn 14
(upper yarn) from the winding section 17 when the yarn 14
is disconnected for some reason between the yarn supplying
section 15 and the winding section 17. In the present
20 embodiment, the yarn joining device 38 is configured as a
splicer device adapted to twist yarn ends by a whirling
airflow generated by compressed air. However, the yarn
joining device 38 is not limited to the splicer device, and
for example, a mechanical knotter and the like may be
25 adopted.
The upper yarn catching and guiding device 30 is a
device adapted to catch the upper yarn when the yarn 14 is
disconnected. The upper yarn catching and guiding device
30 is configured by a shaft portion 31, a pipe member 32,
30 and a suction port 33. By the control of the unit control
section 50, the pipe member 32 can by swung towards the yarn
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supplying section 15 and the winding section 17 with the
shaft portion 31 as the center of swing. Furthermore, the
upper yarn catching and guiding device 30 is connected to
a negative pressure source (not illustrated), and can
5 generate a suction flow at the suction port 33. According
to such a configuration, the suction port 33 can catch the
upper yarn and guide the upper yarn to the yarn joining
device 38 (state of solid line of FIG. 2).
Similarly to the upper yarn catching and guiding
10 device 30, the lower yarn catching and guiding device 34
is configured by a shaft portion 35, a pipe member 36, and
a lower yarn catching suction port 37. Similarly to the
suction port 33, the lower yarn catching suction port 37
can be swung with the shaft portion 35 as the center of swing,
15 and the suction flow can be generated. According to such
a configuration, the lower yarn catching and guiding device
34 can catch the lower yarn and guide the lower yarn to the
yarn joining device 38 (state of solid line of FIG. 2).
The clearer 40 includes a sensor (not illustrated)
20 adapted to detect the thickness of the yarn joining device
38. The clearer 40 detects a yarn defect such as slub by
monitoring the yarn thickness signal from the sensor. A
cutter 41 is provided in proximity to the clearer 40, and
immediately cuts the yarn 14 when the clearer 40 detects
25 the yarn defect. The detection result of the sensor may
be analyzed by the processing section in the clearer 40 or
may be analyzed by the unit control section 50.
Accordingly, the winding unit 10 can wind the yarn
14 around the winding bobbin 19 to form the package 22.
30 Next, a description will be made on a bobbin
supporting device 5 with reference to FIG. 3. The bobbin
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supporting device 5 includes a unit frame 11, a cradle 18,
and a pair of rotation supporting sections (first rotation
supporting section 64 and second rotation supporting
section 68), to be described later.
5 As illustrated in FIG. 3, the cradle 18 is configured
as a metal frame having a substantially U-shape.
Specifically, the cradle 18 is configured by a first arm
61, a second arm 62, and a connecting portion 63. The first
arm 61 and the second arm 62 are respectively connected to
10 both ends of the connecting portion 63. The first arm 61,
the second arm 62, and the connecting portion 63 are
integrally configured.
As illustrated in FIG. 3, the first rotation
supporting section (rotation supporting section) 64 is
15 attached to the distal end of the first arm 61. The second
rotation supporting section 68 is attached to the distal
end of the second arm 62. The first rotation supporting
section 64 and the second rotation supporting section 68
sandwich the winding bobbin 19 in an axis line direction
20 thereof to support the winding bobbin 19 (package 22). In
the following description, the direction in which the pair
of rotation supporting sections sandwiches the package 22
(the axis line direction of the winding bobbin 19) is
referred to as a “sandwiching direction”.
25 In the present embodiment, the cradle 18 is
configured to support a cone shaped (tapered shape) package
22. The first rotation supporting section 64 supports a
large diameter side of the package 22, and the second
rotation supporting section 68 supports a small diameter
30 side of the package 22.
The first rotation supporting section 64 includes a
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first rotation member (rotation member) 65 that makes
contact with the winding bobbin 19 and rotates with the
package 22. The second rotation supporting section 68
includes a second rotation member 69 that makes contact with
5 the winding bobbin 19 and rotates with the package 22. The
first rotation member 65 and the second rotation member 69
are arranged to face each other so that the respective
rotation axes coincide with each other.
According to such a configuration, the first rotation
10 member 65 is fitted to the large diameter side of the winding
bobbin 19, and the second rotation member 69 is fitted to
the small diameter side of the winding bobbin 19 to
rotatably support the package 22. The first rotation
supporting section 64 includes a slide mechanism 66 for
15 moving the first rotation member 65 in the sandwiching
direction. The detailed configuration of the slide
mechanism 66 will be described later.
A first swing shaft attachment section (cradle swing
supporting section) 120 projecting out from the surface is
20 formed on the unit frame 11 of the winding unit 10. A first
adjusting section 70 is attached to the first swing shaft
attachment section 120. A second adjusting section 75 is
attached to the first adjusting section 70, and the cradle
18 is attached to the second adjusting section 75.
25 Hereinafter, the first adjusting section 70 and the second
adjusting section 75 will be described.
The first adjusting section 70 includes a first swing
shaft 71 and a first shaft attachment member 72. The first
swing shaft 71 is arranged so that the axial direction and
30 the sandwiching direction are the same. The first swing
shaft 71 is rotatably supported by the unit frame 11 (first
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swing shaft attachment section 120). The height of the
cradle 18 can be adjusted by swinging (rotating) the first
swing shaft 71. Thus, when the cradle 18 is swung upward
(upward direction of FIG. 2) with advancement of the winding
5 of the yarn 14, the increase in diameter by the winding of
the package 22 can be absorbed.
The first shaft attachment member 72 is configured
to be integrally rotatable with the first swing shaft 71.
The first shaft attachment member 72 is a substantially
10 U-shaped member, and includes a first member 72a and a
second member 72b arranged to face each other. Each of the
first member 72a and the second member 72b is provided with
a through-hole in a direction orthogonal to the first swing
shaft 71. The second adjusting section 75 is attached to
15 the first adjusting section 70 using the through-hole.
The second adjusting section 75 includes a second
swing shaft 76 and a second shaft attachment member 77. The
second swing shaft 76 is arranged so that the axial
direction is orthogonal to the first swing shaft 71 and the
20 sandwiching direction. The second swing shaft 76 is
attached so as to pass through the through-hole formed in
the first member 72a and the second member 72b. The heights
of the first arm 61 and the second arm 62 (specifically,
difference between the heights of the first arm 61 and the
25 second arm 62) can be adjusted by swinging (rotating) the
second swing shaft 76.
The second shaft attachment member 77 is configured
to be integrally rotatable with the second swing shaft 76.
A through-hole (not illustrated) is formed in the second
30 shaft attachment member 77. By inserting a bolt or the like
in this long hole and fastening the bolt, the second
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adjusting section 75 can be attached to the cradle 18.
A coupling section 80 couples the first adjusting
section 70 and the second adjusting section 75, and swings
the first swing shaft 71 and the second swing shaft 76 in
5 conjunction with each other. The coupling section 80
includes a first coupling section 81 and a second coupling
section 82. An insertion hole, to which the second swing
shaft 76 can be inserted, is formed in the second coupling
section 82. The second swing shaft 76 is inserted to the
10 insertion hole and the bolt is fastened to fix the second
swing shaft 76 to the second coupling section 82. The first
coupling section 81 can couple the second coupling section
82 and the first shaft attachment member 72 by inserting
and fastening a bolt 83 and the like. According to such
15 a configuration, the first swing shaft 71 and the second
swing shaft 76 can be coupled with each other. The coupling
section 80 is integrally swung with the second adjusting
section 75.
Next, a description will be made on the slide
20 mechanism 66 with reference to FIG. 4. FIG. 4 is a
cross-sectional view (specifically, end face view
illustrating the shape of a cut plane) of the first rotation
supporting section 64.
The slide mechanism 66 can move the first rotation
25 member 65 in the sandwiching direction. As illustrated in
FIG. 4, the slide mechanism 66 includes a bearing holding
member 91, bearings 92a, 92b, a shaft 93, a bush 94, and
a casing section 95.
The shaft 93 is a rotation shaft of the first rotation
30 member 65. The first rotation member 65 is attached to the
distal end of the shaft 93 in a relatively non-rotatable
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manner. The shaft 93 is attached to the bearing holding
member 91 via the bearings 92a, 92b. The bearing holding
member 91 is a cylindrical member, and includes, on the
outer peripheral surface thereof, three annular groove
5 portions 91a, 91b, 91c in this order from the first rotation
member 65 side.
O-rings (vibration preventing members) 111, 112 are
attached to the annular groove portions 91a, 91c,
respectively. Furthermore, an annular packing member 113
10 having a Y-shaped cross-section, for example, is attached
to the annular groove portion 91b.
Two bushes 94 are arranged side by side on the outer
side of the bearing holding member 91. A casing section
95 is arranged on the outer side of the bush 94. With the
15 arrangement of the O-rings 111, 112 between the bearing
holding member 91 and the casing section 95, the vibration
generated on one side is less likely to be transmitted to
the other side. What kind of vibrations is suppressed by
the O-rings 111, 112 will be described later.
20 The casing section 95 is a cylindrical member in which
a first rotation member 65 side is opened and a bottom
surface is formed on the opposite side. The first arm 61
is fixed to proximity of the end on the bottomed side of
the casing section 95. The bearing holding member 91 and
25 the like are inserted inside the casing section 95. The
slide mechanism 66 can move the bearing holding member 91,
and the like along the inner peripheral surface of the
casing section 95.
A pressure chamber 95a is formed in proximity to the
30 end on the bottomed side of the casing section 95. A first
spring 96 configured as a compression coil spring is
15 / 38
arranged inside the pressure chamber 95a. The first spring
96 urges the bearing holding member 91 towards the first
rotation member 65 (towards left side in FIG. 4). Since
the first rotation member 65 is urged towards the second
5 rotation member 69, the winding bobbin 19 can be sandwiched
and supported with a pair of rotation supporting sections.
Furthermore, the cradle 18 includes an operation
lever 100 for sliding the slide mechanism 66. As
illustrated in FIG. 3, the operation lever 100 has its basal
10 end attached to the cradle 18 via a supporting shaft 101.
A grip section (not illustrated) is provided to an end on
the opposite side of the operation lever 100. A slide
mechanism connecting portion 102 is formed at a portion in
the middle in the longitudinal direction of the operation
15 lever 100, and the operation lever 100 and the member on
the slide side are coupled. According to such a
configuration, the bearing holding member 91 and the like
can be moved in the sandwiching direction by swinging the
operation lever 100.
20 Therefore, when the operation lever 100 is operated
to swing, the first rotation member 65 can be moved in a
direction (rightward direction in FIG. 4) of moving away
from the second rotation member 69 against the urging force
of the first spring 96. The distance of the first rotation
25 member 65 and the second rotation member 69 is thereby
separated to release the sandwiching of the winding bobbin
19, whereby the winding bobbin 19 can be attached and
detached.
An air supplying hole (not illustrated) is formed in
30 the pressure chamber 95a, and the compressed air can be
supplied into the pressure chamber 95a. The packing member
16 / 38
113 seals the pressure chamber 95a to prevent the compressed
air from leaking from the pressure chamber 95a. A second
spring 97 is arranged in an internal space of the bearing
holding member 91. The second spring 97 is configured as
5 a compression coil spring, and exerts an urging force in
a direction in which the first rotation member 65 and a brake
shoe 98 provided in the bearing holding member 91 are
separated. When the compressed air is supplied into the
pressure chamber 95a, the bearing holding member 91 can be
10 moved towards the first rotation member 65 (leftward
direction in FIG. 4). The brake shoe 98 is thereby pushed
against the first rotation member 65, so that the rotation
of the winding bobbin 19 can be decelerated.
The vibration preventing structure adopted in the
15 present embodiment will now be described.
In the yarn winding machine, in particular, the
automatic winder 1 adapted to wind the yarn 14 at high speed
as in the present embodiment, vibration is generated when
the package 22 rotates. Such vibration becomes
20 particularly large when winding the package 22 of an
irregular shape (asymmetrical shape). The vibration
generated in the package 22 is transmitted to the cradle
18 via the first rotation supporting section 64. The
vibration transmitted to the cradle 18 is transmitted to
25 the unit frame 11 via the second adjusting section 75 and
the first swing shaft 71. A great number of components are
attached to the unit frame 11, and thus such components may
be affected when the vibration is transmitted to the unit
frame 11. In particular, various types of control devices
30 are attached to the unit frame 11, and a substrate arranged
inside the control device is susceptible to vibration, and
17 / 38
hence the possibility of causing malfunction becomes
higher.
In view of the above, the present embodiment includes
a plurality of configurations that prevent the vibration
5 generated by the rotation of the package 22 from being
transmitted to the unit frame 11. First, the vibration
preventing structure provided in the first rotation
supporting section 64 will be described.
As described above, the vibration generated by the
10 rotation of the package 22 is less likely to be transmitted
to the casing section 95 (furthermore, cradle 18) by
arranging the O-rings 111, 112 on the outer peripheral
surface of the bearing holding member 91.
FIG. 5 is a graph illustrating results of experiment
15 conducted to check the effect of the vibration preventing
structure. A configuration in which the O-rings 111, 112
are not arranged between the bearing holding member 91 and
the casing section 95 is adopted as a comparative example.
In this experiment, the winding of the yarn is first carried
20 out using the winding unit of the comparative example to
measure the vibration by measuring acceleration with an
acceleration sensor, and thereafter, the winding of the
yarn is carried out using the winding unit of the present
embodiment to measure the vibration. As illustrated in the
25 graph of FIG. 5, it was confirmed that the vibration can
be suppressed by using the first rotation supporting
section 64 of the present embodiment.
The vibration is less likely to be transmitted to
areas close to the generation source of the vibration by
30 preventing the vibration with the first rotation supporting
section 64 as described above, and thus the vibration of
18 / 38
not only the unit frame 11 but also the cradle 18 can be
suppressed.
The vibration preventing structure provided between
the first adjusting section 70 and the unit frame 11 will
5 now be described.
FIG. 6 is a cross-sectional view of a connecting area
of the first swing shaft 71 and the unit frame 11. As
described above, the first swing shaft 71 is fixed by being
inserted to a first swing shaft attachment section 120. As
10 illustrated in FIG. 6, the first swing shaft attachment
section 120 includes second bearings 121, 122 for rotatably
holding the first swing shaft 71, and a second bearing
holding member 123 arranged on the outer side of the second
bearings 121, 122.
15 Vibration preventing covers (vibration preventing
members) 124, 125 are attached further on the outer side
of the second bearing holding member 123. The vibration
preventing covers 124, 125 are cylindrical members made of
resin. The vibration generated by the rotation of the
20 package 22 is less likely to be transmitted to the unit frame
11 by arranging the vibration preventing covers 124, 125
on the outer side of the second bearing holding member 123.
In particular, by preventing the vibration between the
first adjusting section 70 and the unit frame 11, not only
25 the vibration generated by the rotation of the package 22
but the vibration generated by the cradle 18 is also less
likely to be transmitted to the unit frame 11. The
vibration preventing cover 124 is not limited to being made
of resin, and may be made of other materials (e.g., rubber).
30 FIGS. 7A and 7B are graphs illustrating results of
experiment conducted to check the effect of the vibration
19 / 38
preventing structure. FIG. 7A is a graph in which the
vibration of when the winding of the yarn is carried out
with a configuration (comparative example) not including
the vibration preventing covers 124, 125 is measured with
5 a three-axis acceleration sensor. The magnitude of the
acceleration by the acceleration sensor indicates the
magnitude of the vibration. FIG. 7B is a graph in which
the vibration of when the winding of the yarn 14 is carried
out with a configuration not including the O-rings 111, 112
10 and a below-described vibration preventing rubber
(vibration preventing member) 132 using the first swing
shaft attachment section 120 of the present embodiment is
measured. As illustrated in the graph of FIG. 7B, it was
confirmed that the vibration can be suppressed by using the
15 first swing shaft attachment section 120 of the present
embodiment.
The vibration preventing structure arranged at the
connecting area of the first adjusting section 70 and the
second adjusting section 75 will now be described.
20 As described above, the first adjusting section 70
and the second adjusting section 75 are coupled by arranging
the first coupling section 81 so as to extend over the first
shaft attachment member 72 and the second coupling section
82, and fastening the bolt 83 and the like. Therefore, the
25 first shaft attachment member 72 and the second coupling
section 82 are integrally fixed by the bolt 83. In view
of the above, the vibration preventing member is arranged
at the periphery of the bolt 83 to suppress the vibration
transmitted from the second coupling section 82 to the first
30 shaft attachment member 72.
Specifically, as illustrated in FIG. 8, a bolt
20 / 38
inserting portion 131, to which the bolt 83 can be inserted,
is attached to the first coupling section 81. A cylindrical
vibration preventing rubber 132 made of rubber is arranged
on the outer side of the bolt inserting portion 131 and on
5 the head side of the bolt 83, and a cylindrical protecting
member 133 made of resin, for example, is arranged in
proximity to the end on the opposite side.
The vibration generated by the rotation of the
package 22 is thus less likely to be transmitted to the first
10 shaft attachment member 72. The first adjusting section
70 and the second adjusting section 75 are members normally
used when the yarn 14 is wound using the cradle 18. By
realizing the vibration preventing structure using such
members, the number of components can be suppressed. The
15 vibration preventing rubber 132 is not limited to being made
of rubber, and may be made of other materials (e.g., resin).
The protecting member 133 is not limited to resin, and may
be made of materials other than resin.
FIGS. 9A and 9B are graphs illustrating results of
20 experiment conducted to check the effect of the vibration
preventing structure. FIG. 9A is a graph in which the
vibration of when the winding of the yarn is carried out
with a configuration (comparative example) in which the
vibration preventing rubber 132 and the like is not arranged
25 in the second coupling section 82, is measured. FIG. 9B
is a graph in which the vibration of when the winding of
the yarn 14 is carried out with a configuration not
including the O-ring 111 and the vibration preventing
covers 124, 125 using the second coupling section 82 of the
30 present embodiment, is measured. As illustrated in the
graph of FIG. 9B, whether the vibration can be suppressed
21 / 38
using the second coupling section 82 of the present
embodiment is checked.
As described above, in the present embodiment, the
vibration preventing structure is provided at three areas
5 from the first rotation supporting section 64 to the unit
frame 11, but the number of vibration preventing structures
to be provided is arbitrary and at least one vibration
preventing structure merely needs to be provided.
As described above, the bobbin supporting device 5
10 includes the unit frame 11, the cradle 18, and the pair of
rotation supporting sections (first rotation supporting
section 64 and second rotation supporting section 68). The
cradle 18 is supported by being attached to the unit frame
11, and includes the first arm 61 and the second arm 62.
15 The pair of rotation supporting sections is attached to the
first arm 61 and the second arm 62, respectively, and
rotatably supports the winding bobbin 19 for winding the
yarn. The pair of rotation supporting sections includes
the pair of rotation members (first rotation member 65 and
20 second rotation member 69) that rotates with the winding
bobbin 19. The O-rings 111, 112 are arranged at least
between the first rotation supporting section 64 and the
unit frame 11.
Thus, the vibration generated by the rotation of the
25 package 22 is less likely to be transmitted to the unit frame
11 supporting the cradle 18, and thus components (e.g.,
substrate) susceptible to the vibration attached to the
unit frame 11 can be prevented from being broken. Since
the range in which the vibration is transmitted can be
30 narrowed, noise generated in the bobbin supporting device
5 can be suppressed.
22 / 38
Furthermore, in the bobbin supporting device 5 of the
present embodiment, the O-rings 111, 112 are preferably
arranged between the first rotation member 65 and the cradle
18.
5 Thus, the vibration generated by the rotation of the
package 22 is less likely to be transmitted not only to the
unit frame 11 but also to the cradle 18, and thus the cradle
18 and the components attached to the cradle 18 can be
prevented from being worn or broken.
10 Moreover, the bobbin supporting device 5 of the
present embodiment further includes the first rotation
supporting section 64, the bearings 92a, 92b, and the
bearing holding member 91. The bearings 92a, 92b rotatably
support the first rotation member 65. The bearing holding
15 member 91 holds the bearings 92a, 92b. The O-rings 111,
112 are formed in an annular shape, and are arranged at the
outer periphery of the bearing holding member 91.
Thus, the vibration generated by the rotation of the
package 22 is transmitted to the cradle 18 via the bearings
20 92a, 92b and the bearing holding member 91, but the
vibration in the entire peripheral direction can be
suppressed since the O-rings 111, 112 have an annular shape.
In the bobbin supporting device 5 of the present
embodiment, the first rotation supporting section 64
25 includes the hollow casing section 95 that is arranged at
the outer periphery of the bearing holding member 91 and
that movably supports the bearing holding member 91 in the
rotation axis direction of the first rotation member 65.
The O-rings 111, 112 are arranged to make contact with the
30 inner periphery of the casing section 95.
The O-rings 111, 112 are thereby held so as to be
23 / 38
sandwiched by the bearing holding member 91 and the casing
section 95, and the vibration preventing effect thus can
be stably exhibited.
In the bobbin supporting device 5 of the present
5 embodiment, the pressure chamber 95a, to which the fluid
is sent to move the bearing holding member 91 with respect
to the casing section 95, is formed on the inner side of
the casing section 95. An annular packing member for
preventing the fluid from leaking from the pressure chamber
10 95a is formed side by side with the O-rings 111, 112 on the
outer periphery of the bearing holding member 91.
Thus, the vibration generated by the rotation of the
package 22 is less likely to be transmitted even in the first
rotation supporting section 64 that can move the bearing
15 holding member 91 with respect to the casing section 95 for
braking and the like of the package 22, for example.
Furthermore, in the bobbin supporting device 5 of the
present embodiment, a plurality of O-rings 111, 112 are
arranged side by side in the rotation axis direction of the
20 first rotation member 65. The O-rings 111, 112 are arranged
on one side with respect to the packing member in the
rotation axis direction of the first rotation member 65,
and the O-rings 111, 112 are also arranged on the other side
with respect to the packing member.
25 The O-rings 111, 112 are thus provided to sandwich
the packing member, so that the vibration, in particular,
can be suppressed at the periphery of the packing member.
The sealability of the pressure chamber 95a thus can be
improved while exhibiting the vibration preventing effect.
30 Next, a description will be made on another
embodiment with reference to FIG. 10. In the description
24 / 38
of the present embodiment, the same reference numerals are
denoted in the drawing on the same or corresponding
configurations as those in the above-described embodiment,
and the description thereof may be omitted.
5 In the above-described embodiment, the O-rings 111,
112 serving as the vibration preventing members are
arranged on the outer periphery of the bearing holding
member 91. With regard to this, O-rings 114, 115 serving
as the vibration preventing members of the present
10 embodiment are arranged between the first rotation
supporting section 64 and the first arm 61. Specifically,
a projection 95b, which projects out towards the radially
outer side, is formed on the outer periphery of the casing
section 95 of the present embodiment, and an annular groove
15 95c is formed in the projection 95b. An annular groove 95d
is also formed on the bottomed side of the projection 95b.
The O-ring 114 and the O-ring 115 are respectively arranged
in the annular groove 95c and the annular groove 95d.
The first arm 61 includes an inner peripheral side
20 supporting portion 61a and an outer peripheral side
supporting portion 61b at a portion where the first rotation
supporting section 64 is attached. The inner peripheral
side supporting portion 61a is, for example, a ring-shaped
member, and is attached to the inner side (outer peripheral
25 side supporting portion 61b) of the through-hole formed at
the end of the first arm 61. The inner peripheral side
supporting portion 61a is provided with a step difference
so as to correspond to the portion where the projection 95b
is formed.
30 According to such a configuration, the O-rings 114,
115 are arranged between the first rotation supporting
25 / 38
section 64 and the first arm 61, and thus the vibration can
be suppressed from being transmitted from the first
rotation supporting section 64 to the first arm 61. In
particular, in the above-described embodiment, the O-rings
5 111, 112 are arranged in the slide mechanism 66, and thus
there is a possibility that the O-rings 111, 112 may be worn.
Since the casing section 95 and the first arm 61 are not
configured to slide, the wear of the O-rings 114, 115 can
be suppressed and the lifespan can be extended.
10 In the present embodiment, the two bushes 94a, 94b
are arranged spaced apart from one another. The packing
member 113 is arranged between the bush 94a and the bush
94b. Therefore, the present embodiment differs from the
above-described embodiment also in that the packing member
15 113 directly makes contact with the casing section 95.
The preferred embodiment of the present invention has
been described above, but the above-described
configuration may be modified as below.
In the above-described embodiments, there has been
20 described an example in which the vibration preventing
member such as the O-rings 111, 112 is arranged in the first
rotation supporting section 64 on the large diameter side,
but the vibration preventing member such as the O-ring may
be arranged in the second rotation supporting section 68
25 on the small diameter side as long as the effect of
preventing vibration can be obtained.
The cradle 18 may not include a pair of arms, and may
include only one arm. In this case, one rotation supporting
section is attached to one arm, and the vibration preventing
30 member merely needs to be provided between the rotation
member of the rotation supporting section and the unit frame
26 / 38
11.
The number and the position of the O-ring to be
arranged on the outer side of the bearing holding member
91 are arbitrary, and can be appropriately changed. The
5 shape, the number, and the position of the bush 94 that
covers the bearing holding member 91 are also arbitrary.
For example, two bushes 94 are arranged in the
above-described embodiment, but only one bush 94 may be
arranged. Furthermore, the bush may be arranged between
10 the O-ring 111 and the packing member 113, or between the
O-ring 112 and the packing member 113. The vibration may
be prevented by using the packing member 113 instead of the
O-ring.
The type of bush 94 is arbitrary, and a configuration
15 may be adopted in which the oil supply amount is very small
or zero, or a normal bush.
In the above-described embodiment, the bearing
holding member 91 and the like are moved along the
sandwiching direction using the compressed air, but the
20 bearing holding member 91 and the like may be moved using
other fluids.
In the above-described embodiment, the vibration
preventing member described above is used so that the
vibration of the package 22 is less likely to be transmitted
25 to the unit frame 11. Alternatively, if another supporting
member that supports the cradle 18 and other components
exists, for example, the vibration preventing member may
be used to suppress the vibration transmitted to such a
supporting member.
30 In the above-described embodiment, there has been
described an example in which the present invention is
27 / 38
applied to the automatic winder, but the present invention
may also be applied to a yarn winding machine (e.g.,
pneumatic spinning machine, open end spinning machine, yarn
twisting machine, and the like) adapted to wind the yarn
5 to form the package.
According to an aspect of the present invention, a
bobbin supporting device having the following
configuration is provided. That is, the bobbin supporting
device includes a base member, a cradle, and a rotation
10 supporting section. The cradle is supported by being
attached to the base member, and includes arms. The
rotation supporting section is attached to the arm and is
adapted to rotatably support a winding bobbin for winding
a yarn. The rotation supporting section includes a
15 rotation member that rotates with the winding bobbin. A
vibration preventing member is provided between the
rotation member and the base member.
Thus, the vibration generated by the rotation of the
package is less likely to be transmitted to the base member
20 supporting the cradle, and thus components (e.g.,
substrate) susceptible to vibration which are attached to
the base member can be prevented from being broken. Since
the vibration of the components attached to the base member
can be suppressed, the number of vibrating components can
25 be reduced, whereby noise generated in the bobbin
supporting device can be suppressed.
The above-described bobbin supporting device
preferably has the following configuration. That is, the
cradle includes a pair of arms. The rotation supporting
30 sections are attached to each of the pair of arms, and each
rotation supporting section includes the rotation member.
28 / 38
The vibration preventing member is provided at least
between the rotation member on one side and the base member.
In the above-described bobbin supporting device, the
vibration preventing member is preferably arranged between
5 the rotation member and the cradle.
Thus, the vibration generated by the rotation of the
package is less likely to be transmitted not only to the
base member but also to the cradle, and the cradle as well
as the components attached to the cradle can be prevented
10 from being worn and broken.
The above-described bobbin supporting device
preferably has the following configuration. That is, the
rotation supporting section further includes a bearing and
a bearing holding member. The bearing is adapted to
15 rotatably support the rotation member. The bearing
holding member is adapted to hold the bearing. The
vibration preventing member is formed in an annular shape
and is arranged at an outer periphery of the bearing holding
member.
20 Thus, the vibration generated by the rotation of the
package is transmitted to the cradle via the bearings and
the bearing holding member, but the vibration in the entire
peripheral direction can be suppressed since the vibration
preventing member has an annular shape.
25 The above-described bobbin supporting device
preferably has the following configuration. That is, the
rotation supporting section further includes a hollow
casing section arranged at an outer periphery of the bearing
holding member and adapted to support the bearing holding
30 member so as to be movable in a rotation axis direction of
the rotation member. The vibration preventing member is
29 / 38
arranged to make contact with an inner periphery of the
casing section.
The vibration preventing members are thereby held so
as to be sandwiched by the bearing holding member and the
5 casing section, so that the vibration preventing effect can
be stably exhibited.
The above-described bobbin supporting device
preferably has the following configuration. That is, a
pressure chamber, to which fluid is sent to move the bearing
10 holding member with respect to the casing section, is formed
on an inner side of the casing section. An annular packing
member, adapted to prevent the fluid from leaking from the
pressure chamber, is arranged side by side with the
vibration preventing member at the outer periphery of the
15 bearing holding member.
Thus, the vibration generated by the rotation of the
package is less likely to be transmitted even in the
rotation supporting member that can move the bearing
holding member with respect to the casing section for
20 package brake and the like, for example.
The above-described bobbin supporting device
preferably has the following configuration. That is, a
plurality of the vibration preventing members are arranged
side by side in a rotation axis direction of the rotation
25 member. The vibration preventing member is arranged on one
side with respect to the packing member in the rotation axis
direction of the rotation member, and the vibration
preventing member is arranged on the other side with respect
to the packing member.
30 The vibration preventing members are thus provided
to sandwich the packing member, so that the vibration, in
30 / 38
particular, can be suppressed at the periphery of the
packing member. The sealability of the pressure chamber
thus can be improved while exhibiting the vibration
preventing effect.
5 In the above-described bobbin supporting device, the
vibration preventing member is preferably arranged between
the rotation member and the arm of the cradle.
Thus, the arms generally support the rotation
supporting section so that the rotation supporting section
10 does not move relatively, and thus the wear of the vibration
preventing member can be prevented.
In the above-described bobbin supporting device, the
vibration preventing member is preferably an O-ring.
The vibration generated by the rotation of the
15 package thus can be suppressed using the inexpensive and
stout vibration preventing member.
The above-described bobbin supporting device
preferably has the following configuration. That is, the
bobbin supporting device further includes a cradle swing
20 supporting section adapted to support the cradle with the
base member such that the cradle is swingable with respect
to the base member. The vibration preventing member is
provided between the base member and the cradle swing
supporting section.
25 Thus, not only the vibration generated by the
rotation of the package, but also the vibration of the
cradle itself is less likely to be transmitted to the base
member.
The above-described bobbin supporting device
30 preferably has the following configuration. That is, the
cradle swing supporting section includes a second bearing
31 / 38
and a second bearing holding member. The second bearing
is adapted to rotatably support the cradle. The second
bearing holding member is adapted to hold the second bearing.
The vibration preventing member is a cylindrical member
5 attached to the outer periphery of the second bearing
holding member. The cradle swing supporting section is
attached to the base member via the cylindrical member.
The vibration generated by the rotation of the
package thus can be suppressed using the vibration
10 preventing member having a simple shape.
In the above-described bobbin supporting device, the
vibration preventing member is preferably made of resin.
The vibration generated by the rotation of the
package thus can be suppressed to an appropriate degree.
15 The above-described bobbin supporting device
preferably has the following configuration. That is, the
bobbin supporting device includes a first adjusting section
and a second adjusting section. The first adjusting
section is swingable with a first swing shaft as a center
20 with respect to the base member. The second adjusting
section is attached to the first adjusting section and swung
with a second swing shaft, direction of which being
different from that of the first swing shaft, as a center
to adjust a tilt of a rotation axis of a package. The
25 vibration preventing member suppresses vibration from
being transmitted from the second adjusting section to the
first adjusting section.
Thus, the vibration generated by the rotation of the
package is less likely to be transmitted using a
30 conventionally provided member that adjusts the tilt of the
package. Therefore, the number of components can be
32 / 38
reduced as compared to the configuration in which an
attachment section and the like of the vibration preventing
member are newly provided.
The above-described bobbin supporting device
5 preferably has the following configuration. That is, the
bobbin supporting device includes a coupling section
adapted to couple the first adjusting section and the second
adjusting section. The vibration preventing member is
arranged in the coupling section.
10 Thus, the vibration from the second adjusting section
to the first adjusting section is transmitted via the
coupling section, whereby the vibration transmitted to the
base member can be effectively suppressed by arranging the
vibration preventing member in the coupling section.
15 In the above-described bobbin supporting device, the
vibration preventing member is preferably made of rubber.
The vibration generated by the rotation of the
package thus can be further suppressed.
According to another aspect of the present invention,
20 a yarn winding machine having the following configuration
is provided. That is, the yarn winding machine includes
the above-described bobbin supporting device, and a yarn
supplying section adapted to hold a yarn supplying bobbin,
wherein the yarn unwound from the yarn supplying bobbin is
25 wound around the winding bobbin supported by the rotation
supporting section.
Thus, in the yarn winding machine, the effect that
the vibration generated by the rotation of the package is
less likely to be transmitted to the member supporting the
30 cradle can be realized.
33 / 38

We claim:
1. A bobbin supporting device characterized by
comprising:
5 a base member;
a cradle that is supported by being attached to the
base member and that includes arms; and
a rotation supporting section attached to the arm and
adapted to rotatably support a winding bobbin for winding
10 a yarn,
wherein the rotation supporting section includes a
rotation member that rotates with the winding bobbin, and
a vibration preventing member is arranged between the
rotation member and the base member.
15
2. The bobbin supporting device according to claim
1, characterized in that the vibration preventing member
is arranged between the rotation member and the cradle.
20 3. The bobbin supporting device according to claim
2, characterized in that
the rotation supporting section further includes
a bearing adapted to rotatably support the rotation
member, and
25 a bearing holding member adapted to hold the bearing,
and
the vibration preventing member is formed in an
annular shape and is arranged at an outer periphery of the
bearing holding member.
30
4. The bobbin supporting device according to claim
34 / 38
3, characterized in that
the rotation supporting section further includes
a hollow casing section arranged at an outer
periphery of the bearing holding member and adapted to
5 support the bearing holding member so as to be movable in
a rotation axis direction of the rotation member, and
the vibration preventing member is arranged to make
contact with an inner periphery of the casing section.
10 5. The bobbin supporting device according to claim
4, characterized in that
a pressure chamber, to which fluid is sent to move
the bearing holding member with respect to the casing
section, is formed on an inner side of the casing section,
15 and
an annular packing member, adapted to prevent the
fluid from leaking from the pressure chamber, is arranged
side by side with the vibration preventing member at the
outer periphery of the bearing holding member.
20
6. The bobbin supporting device according to claim
5, characterized in that
a plurality of the vibration preventing members (111,
112) are arranged side by side in a rotation axis direction
25 of the rotation member, and
the vibration preventing member is arranged on one
side with respect to the packing member in the rotation axis
direction of the rotation member, and the vibration
preventing member is arranged on the other side with respect
30 to the packing member.
35 / 38
7. The bobbin supporting device according to claim
2, characterized in that the vibration preventing member
is arranged between the rotation member and the arm of the
cradle.
5
8. The bobbin supporting device according to any one
of claims 3 to 7, characterized in that the vibration
preventing member is an O-ring.
10 9. The bobbin supporting device according to claim
1, characterized by further comprising:
a cradle swing supporting section adapted to support
the cradle with the base member such that the cradle is
swingable with respect to the base member,
15 wherein the vibration preventing member is arranged
between the base member and the cradle swing supporting
section.
10. The bobbin supporting device according to claim
20 9, characterized in that
the cradle swing supporting section includes
a second bearing adapted to rotatably support the
cradle, and
a second bearing holding member adapted to hold the
25 second bearing,
the vibration preventing member is a cylindrical
member attached to an outer periphery of the second bearing
holding member, and
the cradle swing supporting section is attached to
30 the base member via the cylindrical member.
36 / 38
11. The bobbin supporting device according to claim
10, characterized in that the vibration preventing member
is made of resin.
5 12. The bobbin supporting device according to claim
1, characterized by further comprising:
a first adjusting section swingable with a first
swing shaft as a center with respect to the base member;
and
10 a second adjusting section attached to the first
adjusting section and swung with a second swing shaft,
direction of which being different from that of the first
swing shaft, as a center to adjust a tilt of a rotation axis
of a package,
15 wherein the vibration preventing member suppresses
vibration from being transmitted from the second adjusting
section to the first adjusting section.
13. The bobbin supporting device according to claim
20 12, characterized by further comprising:
a coupling section adapted to couple the first
adjusting section and the second adjusting section,
wherein the vibration preventing member is arranged
in the coupling section.
25
14. The bobbin supporting device according to claim
13, characterized in that the vibration preventing member
is made of rubber.
30 15. The bobbin supporting device according to any
one of claims 1 to 14, characterized in that
37 / 38
the cradle includes a pair of the arms,
the rotation supporting section is attached to each
of the pair of arms and includes the rotation member, and
the vibration preventing member is arranged at least
5 between the rotation member on one side and the base member.
16. A yarn winding machine characterized by
comprising:
the bobbin supporting device according to any one of
10 claims 1 to 15; and
a yarn supplying section adapted to hold a yarn
supplying bobbin,
wherein the yarn unwound from the yarn supplying
bobbin is wound around the winding bobbin supported by the
15 rotation supporting section.