BOBBIN SETTING DEVICE AND YARN WINDING MACHINE
BACKGROUND OF THE INVENTION •
1. Field of the Invention
5 The present invention relates to a configuration of
a bobbin setting device provided in a yarn winding machine.
Specifically, the present invention relates to a
configuration of a gripping section in the bobbin setting
device adapted to grip a bobbin to be newly set.
10 2. Description of the Related Art
A yarn winding machine such as a fine spinning machine
and an automatic winder is a machine that winds a yarn around
a bobbin. A yarn winding machine of this kind includes a
pair of bobbin holders adapted to rotatably support the
15 bobbin. For example, Japanese Patent Application
Laid-open No. 04-29570 (Patent Document 1) discloses a
cradle adapted to hold the bobbin by sandwiching the bobbin
in an axial direction of the bobbin by a fixed holder and
a movable holder.
20 One of the bobbin holders (the movable holder) is
adapted to be movable in a direction to be close to the other
of the bobbin holders (the fixed holder) or in a direction
to be away from the other of the bobbin holders (the fixed
holder) . By bringing the bobbin holders close to each other
25 in a state in which a winding bobbin is arranged between
the pair of bobbin holders, the winding bobbin is sandwiched
in the axial direction by the bobbin holders, and the
winding bobbin can be held at a predetermined position. By
moving the bobbin holders away from each other, the winding
30 bobbin held by the bobbin holders can be removed.
In such a yarn winding machine, there is known a bobbin
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setting device adapted to supply the bobbin to a position
between the bobbin holders. For example, Patent Document
1 describes an automatic doffing device adapted to
transport the bobbin to the position between the fixed
5 holder and the movable holder of the cradle. The automatic
doffing device includes an arm provided with a gripping
section adapted to grip an empty bobbin. By the arm
vertically swinging while the gripping section is gripping
the empty bobbin, the empty bobbin is transported to the
10 position between the bobbin holders.
As a problem of a conventional art, Patent Document
1 points out that when the movable holder is moved towards
the fixed holder after the arm has transported the empty
bobbin to the position between the bobbin holders, a
15 movement of the empty bobbin is restricted by the gripping
section. Patent Document 1 describes that a positional
displacement of an end of the bobbin that is required to
be held by the fixed holder is magnified by such a problem
of the conventional art, and thereby an error occurs in
20 setting the empty bobbin.
To solve the above problem, Patent Document 1
discloses a configuration in which there is provided a
sliding mechanism for moving the empty bobbin in the axial
direction until an end portion of the empty bobbin
25 transported to the position between both holders of the
cradle becomes close to the fixed holder. Patent Document
1 describes that an error in setting the empty bobbin to
the cradle can be prevented by such a configuration.
30 SUMMARY OF THE INVENTION
The configuration of Patent Document 1 requires a
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sliding mechanism formed of a link mechanism and a cam
element to move the arm in a sliding manner, which causes
a problem that a configuration of the doffing device becomes
complicated.
5 The configuration of Patent Document 1 requires an
operation in which after the empty bobbin has been
transported to the position between the pair of bobbin
holders, the sliding mechanism is operated and the empty
bobbin is moved in a parallel manner to position the end
10 of the bobbin. Therefore, there is a concern that time
required for setting the empty bobbin may be longer in
comparison with a conventional bobbin setting device.
An object of the present invention is to provide a
bobbin setting device that can prevent an error in setting
15 the bobbin with a simple configuration.
A bobbin setting device comprises a bobbin gripping
section adapted to grip a bobbin; and a sliding mechanism
adapted to enable the bobbin gripping section to slide with
the bobbin gripped by the bobbin gripping section in an
20 axial direction of the bobbin by an external force applied
to the bobbin.
A yarn winding machine comprises the bobbin setting
device; a yarn supplying section adapted to supply a yarn
to be wound around the bobbin; and a bobbin supporting
25 section arranged movable between a supporting position
where the bobbin supporting section can support the bobbin
and a releasing position where the support is released,
wherein the bobbin supporting section is adapted to push
the bobbin gripped by the bobbin gripping section in the
30 axial direction when the bobbin supporting section moves
from the releasing position towards the supporting position,
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and the bobbin gripping section is adapted to slide with
the bobbin by a force of the bobbin supporting section
pushing the bobbin.
5 BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view illustrating an overall
structure of a fine spinning machine according to an
embodiment of the present invention;
FIG. 2 is a vertical sectional view of the fine
10 spinning machine;
FIG. 3 is a perspective view illustrating structures
of a bobbin gripping section and a sliding mechanism;
FIG. 4A is a back view illustrating a supporting
position of a movable holder;
15 FIG. 4B is a back view illustrating a releasing
position of the movable holder;
FIG. 5 is a vertical sectional view illustrating a
state in which a spun yarn is being caught by a suction pipe
during a doffing operation of a fully-wound package;
20 FIG. 6 is a vertical sectional view illustrating a
state in which a cradle is operated by a cradle operating
arm;
FIG. 7 is a vertical sectional view illustrating a
state when the spun yarn makes contact with a yarn guiding
25 member;
FIG. 8 is a vertical sectional view illustrating a
state in which a bobbin is supplied to a position between
bobbin holders;
FIG. 9 is a back view illustrating the state in which
30 the bobbin is supplied to the position between the bobbin
holders;
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FIG. 10 is a back view illustrating a state in which
the supplied bobbin is fixed to the bobbin holders; and
FIG. 11 is a back view illustrating a state in which
bunch winding is being formed.
5
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
A fine spinning machine (a yarn winding machine)
according to an embodiment of the present invention will
be described with reference to the accompanying drawings.
10 In the present specification, "upstream" and "downstream"
respectively indicate upstream and downstream in a
traveling direction of a yarn at the time of spinning.
A fine spinning machine 1 as a yarn winding machine
illustrated in Fig. 1 includes a number of spinning units
15 (winding units) 2 arranged side by side, a yarn joining
vehicle 3, and a doffing vehicle 4.
As illustrated in Fig. 1, each of the spinning units
2 includes a yarn supplying section 11, a yarn monitoring
device 49, a yarn accumulating device 12, and a winding
20 section 13 in this order from upstream to downstream. Each
spinning unit 2 is adapted to wind a spun yarn 10 supplied
from the yarn supplying section 11 around a bobbin 48 to
produce a package 45 (a bobbin 48 around which a
predetermined length of the spun yarn 10 is wound) . Each
25 spinning unit 2 includes a unit controller (not
illustrated) adapted to control each component.
The yarn supplying section 11 includes a drafting
device 7 and a spinning device 9.
The drafting device 7 is adapted to produce a fiber
30 bundle 8 by drafting a sliver 15. As illustrated in Fig.
2, the drafting device 7 includes four pairs of rollers,
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which are a pair of back rollers 16, a pair of third rollers
17, a pair of middle rollers 19, and a pair of front rollers
20. An apron belt 19 is provided to each roller of the pair
of middle rollers 19.
5 Although a detailed structure of the spinning device
9 is not illustrated, in the present embodiment, the
spinning device 9 is configured as a pneumatic spinning
device adapted to produce the spun yarn 10 by applying
twists to the fiber bundle 8 using whirling airflow.
10 The winding section 13 is adapted to wind the spun
yarn 10 supplied from the yarn supplying section 11 around
the bobbin 48. The winding section 13 includes a winding
drum (a contact roller) 74, a traverse guide 76 capable of
guiding the spun yarn 10, and a cradle 70.
15 The winding drum 74 is adapted to be rotationally
driven while making contact with an outer peripheral
surface of the bobbin 48. By driving the winding drum 74
by an electric motor, which is not illustrated, the winding
section 13 rotates the bobbin 48 in contact with the winding
20 drum 74 with the rotation of the winding drum 74.
Accordingly, the spun yarn 10 is wound around the bobbin
48. The traverse guide 76 is reciprocated in a direction
substantially parallel to an axis of the bobbin 48. By
reciprocating the traverse guide 7 6 while the spun yarn 10
25 is being guided to the traverse guide 76, the spun yarn 10
to be wound around the bobbin 48 can be traversed.
The cradle 70 includes a support shaft 73, a cradle
arm 71 capable of swinging with the support shaft 73 as a
center, and a pair of bobbin holders (a bobbin supporting
30 section) 72a and 72b adapted to support the bobbin 48.
The bobbin holders 72a and 72b are each provided
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rotatable with respect to the cradle arm 71. As illustrated
in Fig. 4A, the bobbin holders 72a and 72b are adapted to
support the bobbin 48 in a rotatable manner about the axis
thereof by sandwiching the bobbin 48 in an axial direction.
5 As illustrated in Fig. 1, in the present embodiment, the
axial direction of the bobbin 48 substantially corresponds
to a direction (a left-right direction of Fig. 1) in which
the spinning units 2 are arranged. In the drawings, the
bobbin 48 and the cradle arm 71 in Fig. 1 and the bobbin
10 48 and the cradle arm 71 in Figs. 4A and 4B are illustrated
opposite to each other in a left-right direction since Fig.
1 is a front view and Figs. 4A and 4B are back views. In
other words, Figs. 4A and 4B are views of the cradle arm
71 when seen from an opposite side (a back side of the fine
15 spinning machine 1) of Fig. 1. Figs. 9 to 11 to be described
later are also back views.
One of the bobbin holders (a movable holder) 72a is
arranged to be capable of moving close to/away from the
other of the bobbin holders (a fixed holder) 72b. In a state
20 (Fig. 4A) in which the bobbin 48 is supported by the bobbin
holders 72a and 72b, a position of the movable holder 72a
is referred to as a "supporting position" . When the movable
holder 72a is moved in a direction away from the fixed holder
72b from this state, the bobbin 48 supported by the bobbin
25 holders 72a and 72b is released. A position of the movable
holder 72a at this time is referred to as a "releasing
position" (Fig. 4B).
The cradle 70 of the present embodiment is capable
of supporting a conical (tapered) bobbin 48. Specifically,
30 the movable holder 72a supports an end portion on a small
diameter side of the bobbin 48, and the fixed holder 72b
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supports an end portion on a large diameter side of the
bobbin 48. The large diameter side.of the bobbin 48 may
be referred to as a "fixed holder side of the bobbin", and
the small diameter side of the bobbin 48 may be referred
5 to as a "movable holder side of the bobbin".
A cradle lifter (a cancelling section) , which is not
illustrated, adapted to swing the cradle arm 71 around the
support shaft 73 is connected to the cradle arm 71. By
swinging the cradle arm 71 by the cradle lifter, the bobbin
10 48 supported by the bobbin holders 72a and 72b can be moved
to a position located away from the winding drum 74.
Accordingly, contact between the bobbin 48 and the winding
drum 74 can be cancelled.
The yarn accumulating device 12 is provided between
15 the spinning device 9 and the winding section 13. The yarn
accumulating device 12 includes a yarn accumulating roller
21 adapted to rotate with a predetermined amount of the spun
yarn 10 wound therearound. The yarn accumulating roller
21 is rotationally.driven at a constant rotational speed
20 by an electric motor 25. By winding the spun yarn 10 around
the yarn accumulating roller 21, the yarn accumulating
device 12 can temporarily accumulate the spun yarn 10
between the yarn supplying section 11 and the winding
section 13.
25 By temporarily accumulating the spun yarn 10 by the
yarn accumulating roller 21, the yarn accumulating device
12 functions as a kind of buffer between the yarn supplying
section 11 and the winding section 13. Accordingly, a
defect (for example, a slackening of the spun yarn 10) in
30 a case where a supplying speed of the spun yarn 10 from the
yarn supplying section 11 and a winding speed of the spun
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yarn 10 in the winding section 13 do not correspond to each
other for some reason can be prevented from occurring, and
thus stable winding of the spun yarn 10 can be realized.
The yarn monitoring device 49 is provided between the
5 spinning device 9 and the yarn accumulating device 12. The
spun yarn 10 produced by the spinning device 9 passes the
yarn monitoring device 4 9 before being accumulated by the
yarn accumulating device 12. The yarn monitoring device
49 is adapted to monitor quality of the travelling spun yarn
10 10 and to transmit a yarn defect detection signal to the
unit controller (not illustrated) when detecting some kind
of abnormality.
The yarn joining vehicle 3 is adapted to be capable
of travelling in the direction (the left-right direction
15 of Fig. 1) in which the spinning units 2 are arranged. After
a yarn breakage or a yarn cut has occurred in the spinning
unit 2 for some reason, the yarn joining vehicle 3 joins
disconnected yarn ends. As illustrated in Figs. 1 and 2,
the yarn joining vehicle 3 includes a yarn joining device
20 43, yarn guiding sections 44 and 46, and traveling wheels
42. After a yarn breakage or a yarn cut has occurred in
a certain spinning unit 2, the yarn joining vehicle 3
travels to such a spinning unit 2 by driving the traveling
wheels 42. The yarn joining vehicle 3 then sucks and
25 catches disconnected yarn ends and introduces the caught
yarn ends to the yarn joining device 43 by the yarn guiding
sections 44 and 46. The yarn joining device 43 joins the
introduced yarn ends together. The yarn joining device 43
of the present embodiment is configured as a pneumatic
30 splicer adapted to join the yarn ends by applying whirling
airflow and twisting the yarn ends together.
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The doffing vehicle 4 is capable of traveling in the
direction (the left-right direction of Fig. 1) in which the
spinning units 2 are arranged. As illustrated in Figs. 1
and 2, the doffing vehicle 4 includes a bobbin setting
5 device 60. The bobbin setting device 60 is adapted to be
capable of performing a bobbin setting operation of
supplying the bobbin 48 to the cradle 70 and preparing for
winding of the spun yarn 10, and a doffing operation of
removing a fully-wound package 45 (the package 45 in a state
10 where winding of a predetermined length of the spun yarn
10 has been completed) from the cradle 70. Travelling
wheels 92 are mounted to a lower portion of the doffing
vehicle 4. When receiving an instruction to perform the
bobbin setting operation and/or the doffing operation to
15 a certain spinning unit 2, the doffing vehicle 4 travels
to such a spinning unit 2 by driving the travelling wheels
92 . The doffing vehicle 4 then stops at the spinning unit
2, for which the instruction has been made, and performs
the bobbin setting operation and/or the doffing operation.
20 The bobbin setting device 60 includes an arm member
51, a suction pipe (a yarn catching and guiding device) 88,
and a cradle operating arm (opening/closing mechanism) 89
as a configuration to perform the bobbin setting operation.
The suction pipe 88 is adapted to be capable of
25 swinging and extending/contracting. The suction pipe 88
catches the spun yarn 10 discharged from the spinning device
9 by sucking, and guides the caught spun yarn 10 to the
winding section 13.
The cradle operating arm 89 is capable of moving the
30 movable holder 72a in the direction to be close to the fixed
holder 72b or the direction to be away from the fixed holder
10 / 3 9
72b by operating the cradle arm 71 of the spinning unit 2.
The movable holder 72a can be moved between the supporting
position (a position illustrated in Fig. 4A) and the
releasing position (a position illustrated in Fig. 4B) by
5 the cradle operating arm 89.
The arm member 51 is swingable with a swing shaft 111
as a center. The bobbin setting device 60 includes an arm
drive section 56 (an air pressure cylinder in this
embodiment) adapted to drive and swing the arm member 51.
10 As illustrated in Fig. 3, the arm member 51 mainly
includes the bobbin gripping section 52, a gripping section
drive cylinder (a gripping-section drive source) 55, a
bunch-winding roller 53, a bunch-winding motor 54, and a
yarn guiding member 31.
15 The bobbin gripping section 52 is arranged in
proximity to a tip-end portion (a tip-end region) of the
arm member 51 and is capable of gripping the bobbin 48. The
bobbin gripping section 52 includes a fixed gripping
section 113 and a movable gripping section 114. The bobbin
20 gripping section 52 grips the bobbin 48 by sandwiching the
bobbin 48 in a radial direction with the fixed gripping
section 113 and the movable gripping section 114.
The fixed gripping section 113 and the movable
gripping section 114 are supported by a movable casing 65,
25 which is to be described later. The fixed gripping section
113 is fixedly provided to the movable casing 65. The
movable gripping section 114 is adapted to be movable in
a direction to be close to the fixed gripping section 113
or a direction to be away from the fixed gripping section
30 113. By moving the movable gripping section 114 , a gripping
state in which the bobbin gripping section 52 is gripping
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the bobbin 48 and a released state (a state in which the
gripping of the bobbin 48 has been released) in which the
bobbin gripping section 52 has released the bobbin 48 can
be switched. The gripping-section drive cylinder 55 is a
5 drive source to move the movable gripping section 114.
The bunch-winding roller 53 is provided in proximity
to the bobbin gripping section 52. The bunch-winding
roller 53 rotationally drives the bobbin 48 when performing
bunch winding to the bobbin 48. In proximity to the
10 bunch-winding roller 53, the bunch-winding motor 54, which
is a drive source of the bunch-winding roller 53, is
arranged. A driving force generated by the bunch-winding
motor 54 is transmitted to the bunch-winding roller 53 by
a transmission mechanism (e.g. , a belt and a pulley) , which
15 is not illustrated. Bunch winding is to form a straight
winding and fix the spun yarn 10 around the bobbin 48 when
starting to wind the spun yarn 10 around a new bobbin 48.
Operations of the bunch winding will be described later.
The bunch-winding roller 53 is provided to be movable
20 in a direction to make contact with the bobbin 48 or a
direction to be away from the bobbin 48 . The bobbin setting
device 60 is adapted such that a movement of the
bunch-winding roller 53 and an opening/closing operation
of the bobbin gripping section 52 are mechanically in
25 conjunction with each other. In the gripping state, the
bunch-winding roller 53 is arranged to recede to a position
away from the bobbin 48. In the released state, the
bunch-winding roller 53 is arranged to advance to a position
where the bunch-winding roller 53 can make contact with the
30 bobbin 48.
As described above, during a period of time in which
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the bobbin 48 is being gripped by the bobbin gripping
section 52, the bunch-winding roller 53 recedes to the
position away from the bobbin 48 . The bunch-winding roller
53 does not disturb gripping of the bobbin 48 by the bobbin
5 gripping section 52. When performing the bunch winding,
the gripping of the bobbin 48 by the bobbin gripping section
52 is released. Accordingly, the bunch-winding roller 53
advances to the position where the bunch-winding roller 53
can make contact with the bobbin 48. Therefore, by
10 rotationally driving the bunch-winding roller 53 in this
state, the bobbin 48 being in contact with the bunch-winding
roller 53 is rotated and the bunch winding can be performed
to the bobbin 48.
The yarn guiding member 31 is arranged in proximity
15 to the bobbin gripping section 52. A yarn hooking groove
32 is formed on the yarn guiding member 31. The yarn hooking
groove 32 is formed in proximity to the end portion on the
large diameter side of the bobbin 48 gripped by the bobbin
gripping section 52. The yarn hooking groove 32 guides the
20 spun yarn 10 to the end portion on the large diameter side
of the bobbin 48 when performing the bunch-winding.
Next, a characteristic configuration of the present
embodiment will be described.
In the bobbin setting device 60 of this embodiment,
25 the arm member 51 includes a sliding mechanism 63 adapted
to enable the bobbin gripping section 52 (the fixed gripping
section 113 and the movable gripping section 114) to slide.
As illustrated in Fig. 3, the sliding mechanism 63
includes a fixed casing 64 , the movable casing (a supporting
30 member) 65, slide shafts 66, and an urging member 69.
The fixed casing 64 is fixed to a tip end of the arm
13 / 3 9
member 51 in a relatively unmovable manner. The movable
casing 65 is configured as a member different from the fixed
casing 64 . The movable casing 65 is relatively movable with
respect to the fixed casing 64.
5 The slide shafts 66 are a round-bar-like member. The
slide shafts 66 are arranged in a direction parallel to the
axis of the bobbin 48 gripped by the bobbin gripping section
52 . In the sliding mechanism 63 of the present embodiment,
as illustrated in Fig. 3, two slide shafts 66 are provided.
10 The two slide shafts 66 are arranged parallel to each other.
The fixed casing 64 includes a first supporting wall
64a and a second supporting wall 64b that are plate-like
and are arranged substantially orthogonal to a longitudinal
direction of the slide shafts 66 (see Figs. 3 and 9) . The
15 first supporting wall 64a and the second supporting wall
64b are arranged facing each other. Holes (not
illustrated) through which the slide shafts 66 are inserted
are formed through each of the first supporting wall 64a
and the second supporting wall 64b. The slide shafts 66
20 are inserted through the holes of the first supporting wall
64a and the second supporting wall 64b.
The slide shafts 66 are fixed to the movable casing
65. Accordingly, the movable casing 65 is supported with
respect to the fixed casing 64 via the slide shafts 66.
25 Since the slide shafts 66 are inserted through the holes
of each of the first supporting wall 64a and the second
supporting wall 64b, the movable casing 65 can be slid in
the longitudinal direction of the slide shafts 66 (the
direction parallel to the axis of the bobbin 48).
30 In the present embodiment, the bobbin setting device
60 includes two slide shafts 66 arranged parallel to each
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other. The two slide shafts 66 thus function as rails to
guide the slide of the movable casing 65, enabling the
movable casing 65 to slide while maintaining a position of
the movable casing 65. Accordingly, the movable casing 65
5 can be stably and smoothly slid.
The bobbin gripping section 52 (the fixed gripping
section 113 and the movable gripping section 114) is
supported by the movable casing 65. The bobbin gripping
section 52 is thus slidable integrally with the movable
10 casing 65. Accordingly, the bobbin gripping section 52 can
be slid with respect to the arm member 51 in the direction
parallel to the axis of the bobbin 48.
In this embodiment, the gripping-section drive
cylinder 55 is also supported by the movable casing 65. The
15 gripping-section drive cylinder 55 thus slides integrally
with the bobbin gripping section 52. A positional
relationship between the bobbin gripping section 52 and the
gripping-section drive cylinder 55 is not changed by the
slide. Accordingly, a transmission mechanism of a driving
20 force from the gripping-section drive cylinder 55 to the
bobbin gripping section 52 can be simplified.
The bunch-winding roller 53 and the bunch-winding
motor 54 are fixedly provided to the arm member 51. The
bunch-winding roller 53 and the bunch-winding motor 54 do
25 not slide with respect to the arm member 51. The yarn
guiding member 31 is also fixedly provided to the arm member
51. The yarn guiding member 31 does not slide with respect
to the arm member 51.
The urging member 69 is a spring (a compression coil
30 spring) . The urging member 69 is arranged to urge the
bobbin gripping section 52 towards the small diameter side
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(a side of the movable holder 72a) of the bobbin 48 gripped
by the bobbin gripping section 52 . Accordingly, the bobbin
gripping section 52 can be held at a position close to the
small diameter side (the side of the movable holder 72a)
5 of the bobbin 48 within a range of a stroke of the slide.
A position where the bobbin gripping section 52 is held by
an urging force of the urging member 69 is referred to as
a "standard position" of the bobbin gripping section 52.
The urging member 69 urges the bobbin gripping section 52
10 towards the standard position. Since the bobbin gripping
section 52 can be held at the standard position with the
above-described configuration, the bobbin gripping section
52 can be prevented from unintentionally sliding by a shock
and/or a vibration. A state in which the bobbin gripping
15 section 52 is being held at the standard position is
illustrated in Figs. 3 and 9.
An arrangement of the urging member 69 will be
specifically described. As illustrated in Figs. 3 and 9,
the urging member 69 is arranged between the first
20 supporting wall 64a of the fixed casing 64 and the movable
casing 65. One slide shaft 66 is inserted through an axial
center of the urging member (spring) 69. Accordingly, the
urging member 69 can be prevented from being removed, and
the bobbin gripping section 52 (and the gripping-section
25 drive cylinder 55) can be urged in the direction parallel
to the slide shaft 66 (the axial direction of the bobbin
48). The urging member 69 -of the present embodiment is
mounted to each of the two slide shafts 66 (see Fig. 3).
A flow when the bobbin setting device 60 performs the
30 doffing operation and the bobbin setting operation will be
described with reference to Figs. 5 to 11.
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When a sensor (not illustrated) detects that the
package 45 has been fully wound in a certain spinning unit
2, the unit controller of such a spinning unit 2 stops the
spinning device 9, and swings the cradle arm 71 to a left
5 side of Fig. 2 (a front side of the fine spinning machine
1) by controlling the cradle lifter of the winding section
13. Accordingly, the fully-wound package 45 is moved away
from the winding drum 74, and thereby rotation of the
package 45 is stopped.
10 The unit controller brings the doffing vehicle 4 to
a position of the spinning unit 2. The doffing vehicle 4
travels to a position to face the specified spinning unit
2 . The bobbin setting device 60 of the doffing vehicle 4
operates the cradle operating arm 89 and removes the
15 fully-wound package 45 from the winding section 13 of the
spinning unit 2. A state at this time is illustrated in
Fig. 5. Specifically, the movable holder 72a of the cradle
70 is moved to the "releasing position" by the cradle
operating arm 89. Accordingly, the fully-wound package 45
20 supported by the movable holder 72a and the fixed holder
72b is removed from the winding section 13.
The removed fully-wound package 45 is guided to a
placing section 82 located below the spinning unit 2 (a
state of Fig. 6) . In this embodiment, the placing section
25 82 has a function as a conveyor. The package 45 is
transported by the conveyor in the direction in which the
spinning units 2 are arranged, and is automatically
gathered in one place. The placing section 82 may be
adapted not to have the conveyor function, and the packages
30 45 on the placing section 82 may be manually collected by
a worker. As described above, the doffing operation
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(removal of the fully-wound package 45) is completed.
While performing the doffing operation, the bobbin
setting device 60 extends the suction pipe 88 upward (see
Fig. 5) . Almost simultaneously, the unit controller of the
5 spinning unit 2 starts driving the drafting device 7 and
the spinning device 9. The suction pipe 88 sucks and
catches a yarn end of the spun yarn 10 discharged from the
spinning device 9 that has started driving. The bobbin
setting device 60 moves the suction pipe 88 downward while
10 the suction pipe 88 is sucking the spun yarn 10. A state
at this time is illustrated in Fig. 6.
At a timing similar to this, the bobbin setting device
60 grips the bobbin 48 stocked in an upper portion of the
doffing vehicle 4 by the bobbin gripping section 52. Then,
15 by driving the arm drive section 56 and swinging the arm
member 51, the bobbin setting device 60 causes the bobbin
gripping section 52 that has gripped the bobbin 48 to
advance to the winding section 13 of the spinning unit 2
(Fig. 7). At this time, the yarn guiding member 31 of the
20 arm member 51 makes contact with the spun yarn 10 being
sucked and caught by the suction pipe 88. A state in which
the spun yarn 10 makes contact with the yarn guiding member
31 is illustrated in Fig. 7. The spun yarn 10 that has made
contact with the yarn guiding member 31 is introduced to
25 the yarn hooking groove 32.
By further swinging the arm member 51 from the state
of Fig. 7, the bobbin 48 can be supplied to a position between
the bobbin holders 72a and 72b (states of Figs. 8 and 9) .
At this time, the arm member 51 is swung while maintaining
30 a state in which the spun yarn 10 is introduced to the yarn
hooking groove 32.
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As described above, the bobbin gripping section 52
is urged towards the standard position by the urging member
69. Since a force opposing to the urging force of the urging
member 69 is not acting in a state (a state of Fig. 9)
5 immediately after the bobbin 48 has been supplied to the
position between the bobbin holders 72a and 72b, the bobbin
gripping section 52 is held at the standard position by the
urging force. As illustrated in Fig. 9, in this state, the
yarn hooking groove 32 is located between the end portion
10 on the large diameter side of the bobbin 48 and the fixed
holder 72b when seen in the radial direction of the bobbin
48 gripped by the bobbin gripping section 52. The spun yarn
10 is thus guided by the yarn hooking groove 32 so as to
pass between the end portion on the large diameter side of
15 the bobbin 48 and the fixed holder 72b.
Next, the bobbin setting device 60 moves the movable
holder 72a in the direction to be close to the fixed holder
72b by driving the cradle operating arm 89. Accordingly,
the movable holder 72a makes contact with the end portion
20 on the small diameter side of the bobbin 48 gripped by the
bobbin gripping section 52 and pushes the bobbin 48 towards
the fixed holder 72b.
A force (a force other than the gripping force of the
bobbin gripping section 52) of the movable holder 72a
25 pushing the bobbin 48 is transmitted to the bobbin gripping
section 52 via the bobbin 48. As described above, the
bobbin setting device 60 of the present embodiment includes
the sliding mechanism 63 that enables the bobbin gripping
section 52 to slide in the axial direction of the bobbin
30 48. Therefore, by the force of the movable holder 72a
pushing the bobbin 48, the bobbin gripping section 52 that
19 / 3 9
is gripping the bobbin 48 can be slid towards the fixed
holder 72b.
When sliding the bobbin gripping section 52 towards
the fixed holder 72b, a force that opposes to the urging
5 force of the urging member 69 is required. The urging force
of the urging member 69 is thus set to be smaller than the
force of the movable holder 72a pushing the bobbin 48.
Accordingly, the movable holder 72a pushes the bobbin 48
against the urging force of the urging member 69, and
10 thereby the bobbin gripping section 52 gripping the bobbin
48 can be slid towards the fixed holder 72b.
As described above, since the bobbin gripping section
52 can be slid with the bobbin 48 by the movable holder 72a
pushing the bobbin 48, the movement of the movable holder
15 72a is not disturbed. Accordingly, the movable holder 72a
can be moved to the supporting position.
When the movable holder 72a is moved to the supporting
position, the end portion on the large diameter side of the
bobbin 48 that has slid by being pushed by the movable holder
20 72a makes contact with the fixed holder 72b. Accordingly,
the bobbin 48 can be sandwiched by the bobbin holders 72a
and 72b, and is thus fixed (a state of Fig. 10). At this
time, the spun yarn 10 being guided by the yarn hooking
groove 32 is sandwiched by the end portion on the large
25 diameter side of the bobbin 48 and the fixed holder 72b,
and is thus fixed (see Fig. 10).
As described above, with the configuration of this
embodiment, under the state in which the bobbin 48 continues
being gripped by the bobbin gripping section 52, the bobbin
30 48 can be fixed between the bobbin holders 72a and 72b. In
this manner, since the bobbin 48 can be fixed (the bobbin
20 / 39
setting operation can be performed) while maintaining the
gripping by the bobbin gripping section 52, a position of
the bobbin 48 is stable, and the bobbin 48 can be reliably
fixed between the bobbin holders 72a and 72b. An error in
5 setting the bobbin 48 thus can be reliably prevented.
In the fine spinning machine 1 as described in the
present embodiment, when the bobbin setting operation is
being performed by the bobbin setting device 60, the bobbin
48 is located away from the winding drum (the contact
10 roller) 74. Therefore, in a conventional bobbin setting
device, when fixing the bobbin 48 to the bobbin holders 72a
and 72b, the position of the bobbin 48 is likely to be
unstable. With the configuration of the present
embodiment, since the bobbin 48 gripped by the bobbin
15 gripping section 52 is fixed between the bobbin holders 72a
and 72b, even when the bobbin 48 is located away from the
winding drum 74, the position of the bobbin 48 does not
become unstable. An error in setting the bobbin 48 thus
can be reliably prevented.
20 As described above, the sliding mechanism 63 slides
the bobbin gripping section 52 by the force of the bobbin
48 being pushed by the movable holder 72a. The driving
force for sliding the bobbin gripping section 52 is
transmitted to the bobbin gripping section 52 via the bobbin
25 48. Therefore, a drive transmission mechanism for
transmitting the driving force for sliding the bobbin
gripping section 52 is not required. The bobbin setting
device 60 of the present embodiment thus does not include
the drive transmission mechanism for transmitting the
30 driving force for sliding the bobbin gripping section 52
to the bobbin gripping section 52. Accordingly, the bobbin
21 / 3 9
setting device 60 can be simply configured.
In the present embodiment, the bobbin gripping
section 52 is slid with the movement of the movable holder
72a. Therefore, an operation is not stopped for the
5 movement of "sliding the bobbin gripping section 52". As
a result, the setting operation of the bobbin 48 can be
performed in a period of time equivalent to a period of time
conventionally required.
As described above, since the yarn guiding member 31
10 of the present embodiment is fixed to the arm member 51 and
arranged not to slide, a positional relationship between
the bobbin 48 and the yarn hooking groove 32 is changed
before and after the slide. Specifically, as illustrated
in Fig. 10, in the state in which the bobbin 48 is fixed
15 between the bobbin holders 72a and 72b (in a state after
the bobbin 48 has been pushed and slid by the movable holder
72a) , the yarn hooking groove 32 is arranged at a position
overlapping with a portion in proximity to the end portion
on the large diameter side of the bobbin 48 when seen from
20 the radial direction of the bobbin 48. The spun yarn 10
is thus guided by the yarn hooking groove 32 to pass a
position where the spun yarn 10 overlaps with the portion
in proximity to the end portion on the large diameter side
of the bobbin 48.
25 After fixing the bobbin 48 between the bobbin holders
72a and 72b, the bobbin setting device 60 releases the
gripping of the bobbin 48 by the bobbin gripping section
52. Accordingly, since the bobbin 48 is released from the
bobbin gripping section 52, the bobbin gripping section 52
30 slides to the standard position by the urging force of the
urging member 69 (Fig. 11) . In this manner, after the
22 / 3 9
bobbin gripping section 52 has released the bobbin 48, the
bobbin gripping section 52 can be returned to the original
standard position by the urging force of the urging member
69. Furthermore, in conjunction with the release of the
5 gripping of the bobbin 48 from the bobbin gripping section
52, the bunch-winding roller 53 advances to a position where
the bunch-winding roller 53 makes contact with the bobbin
48 fixed between the bobbin holders 72a and 72b (an
illustration is omitted).
10 At a timing similar to this, a cutter 33 provided to
the bobbin setting device 60 cuts the spun yarn 10 at a
position between the bobbin 48 and the suction pipe 88 (Fig.
10). The spun yarn 10 that has been cut is sucked by the
suction pipe 88.
15 The bobbin setting device 60 rotates the bobbin 48
by rotationally driving the bunch-winding roller 53 under
a state in which the bunch-winding roller 53 is making
contact with the bobbin 48. Accordingly, the spun yarn 10
that has been guided by the yarn hooking groove 32 is wound
20 in proximity to the end portion on the large diameter side
of the bobbin 48, and thereby bunch-winding is formed (a
state of Fig. 11).
When the bunch-winding has been completed, the arm
drive section 56 is driven to cause a bobbin supplying
25 section 50 to recede into the doffing vehicle 4. The unit
controller swings the cradle arm 71 by driving the cradle
lifter and brings the bobbin 48 into contact with the
winding drum 74. Accordingly, the bobbin 48 is
rotationally driven and winding of the spun yarn 10 is
30 started.
As described above, the bobbin setting device 60 of
23 / 39
the present embodiment includes the bobbin gripping section
52 and the sliding mechanism 63. The bobbin gripping
section 52 grips the bobbin 48. The sliding mechanism 63
enables the bobbin gripping section 52 to slide with the
5 bobbin 48 gripped by the bobbin gripping section 52 in the
axial direction of the bobbin 48 by the force (the force
other than the gripping force of the bobbin gripping section
52) applied to the bobbin 48.
Since the bobbin gripping section 52 can be slid in
10 the axial direction of the bobbin 48, the movement of the
bobbin 48 is not disturbed. Accordingly, an error in
setting the bobbin 48 can be prevented. Since the slide
of the bobbin gripping section 52 is executed by the force
applied to the bobbin 48 gripped by the bobbin gripping
15 section 52, a drive source or the like for the slide is not
required to be provided separately. Accordingly, the
bobbin setting device 60 can be simply configured.
Furthermore, since the bobbin gripping section 52 is slid
by the force applied to the bobbin 48, a special movement
20 for the slide is not required, and thus an extra time for
the slide movement is not required. Time required for
setting the bobbin 48 thus does not become long.
The bobbin setting device 60 of the present
embodiment includes the bobbin gripping section 52 and the
25 sliding mechanism 63 . The bobbin gripping section 52 grips
the bobbin 48 . The sliding mechanism 63 enables the bobbin
gripping section 52 to slide in the axial direction of the
bobbin 48 gripped by the bobbin gripping section 52. The
bobbin setting device 60 is not provided with a structure
30 for transmitting the driving force for the slide to the
bobbin gripping section 52.
24 / 39
With this configuration, the bobbin gripping section
52 is slid by the force applied to the bobbin 48. In other
words, the driving force for the slide is transmitted to
the bobbin gripping section 52 via the bobbin 48 . Therefore,
5 the structure for transmitting the driving force to the
bobbin gripping section 52 is not required to be provided
separately. Accordingly, the bobbin setting device 60 can
be simply configured.
The sliding mechanism 63 of the present embodiment
10 includes the movable casing 65 and the slide shaft 66. The
movable casing 65 supports the bobbin gripping section 52.
The slide shaft 66 is arranged in parallel with the axial
direction of the bobbin 48 gripped by the bobbin gripping
section 52, and slidably supports the movable casing 65.
15 By providing the slide shaft 66, the bobbin gripping section
52 can be stably and smoothly slid.
The bobbin setting device 60 of the present
embodiment further includes the gripping-section drive
cylinder 55 that switches the bobbin gripping section 52
20 between the gripping state in which the bobbin gripping
section 52 is gripping the bobbin 48 and the released state
in which the bobbin gripping section 52 has released the
bobbin 48. The sliding mechanism 63 enables the
gripping-section drive cylinder 55 to slide with the bobbin
25 gripping section 52.
In this manner, by sliding the bobbin gripping
section 52 and the gripping-section drive cylinder 55
together, the positional relationship between the bobbin
gripping section 52 and the gripping-section drive cylinder
30 55 is not changed before and after the slide. Accordingly,
the transmission mechanism of the driving force from the
25 / 39
gripping-section drive cylinder 55 to the bobbin gripping
section 52 can be easily configured.
The bobbin setting device 60 of the present
embodiment includes the urging member 69 that urges the
5 bobbin gripping section 52 towards the standard position.
By the urging force of the urging member 69, the bobbin
gripping section 52 can be held at the standard position.
Accordingly, the bobbin gripping section 52 can be
prevented from unnecessarily sliding by a vibration and/or
10 a shock, and the position of the bobbin 48 gripped by the
bobbin gripping section 52 can be stabilized.
In the bobbin setting device 60 of the present
embodiment, the urging member 69 is a spring. The urging
member 69 urges the bobbin gripping section 52 in a
15 direction opposite to the direction of the force (the force
of the movable holder 72a pushing the bobbin 48) applied
to the bobbin 48 gripped by the bobbin gripping section 52.
Thus, the bobbin gripping section 52 that has released the
gripping of the bobbin 48 can be returned to the standard
20 position by the urging force of the urging member 69.
The bobbin setting device 60 of the present
embodiment includes the arm member 51, the bobbin gripping
section 52, the sliding mechanism 63, and the urging member
69. The arm member 51 is swingable. The bobbin gripping
25 section 52 is arranged at the tip-end region of the arm
member 51, and grips the bobbin 48. The sliding mechanism
63 enables the bobbin gripping section 52 to slide with
respect to the arm member 51 in the axial direction of the
bobbin 48 gripped by the bobbin gripping section 52. The
30 urging member 69 urges the bobbin gripping section 52
towards the standard position.
26 / 39
Since a whole arm member slides in a configuration
of Patent Document 1, fluttering or the like may occur at
a base-end portion of the arm member and thereby the arm
member cannot be smoothly slid. As in the present
5 embodiment, if the bobbin gripping section 52 is adapted
to be slid with respect to the arm member 51, the whole arm
member is not required to be slid. In this manner, since
only the bobbin gripping section 52 required to be slid is
slid, the bobbin gripping section 52 can be smoothly slid.
10 The fine spinning machine 1 of the present embodiment
includes the bobbin setting device 60, the yarn supplying
section 11, and the bobbin holders 72a and 72b. The yarn
supplying section 11 supplies the spun yarn 10 to be wound
around the bobbin 48. The bobbin holder 72a is arranged
15 movable between the supporting position where the bobbin
holders 72a and 72b can support the bobbin 48 and the
releasing position where the support is released. The
bobbin holder 72a is adapted to push the bobbin 48 gripped
by the bobbin gripping section 52 in the axial direction
20 when moving from the releasing position to the supporting
position. By the force of the bobbin holder 71a pushing
the bobbin 48, the bobbin gripping section 52 slides with
the bobbin 48.
With the above-described configuration, the movement
25 of the bobbin holder 72a from the releasing position to the
supporting position is not disturbed by the bobbin gripping
section 52. Accordingly, the bobbin 48 can be
appropriately supported by the bobbin holder 72a that has
been moved to the supporting position.
30 In the fine spinning machine 1 of the present
embodiment, the yarn supplying section 11 includes the
2 7 / 3 9
drafting device 7 and the spinning device 9. The drafting
device 7 drafts the fiber bundle 8. The spinning device
9 is the pneumatic spinning device that produces the spun
yarn 10 by applying twists to the fiber bundle 8, which has
5 been supplied from the drafting device 7, using the whirling
airflow. Since the bobbin setting operation does not take
time, the spun yarn 10 continuously spun from the spinning
device 9 during the bobbin setting operation can be
prevented from being wasted.
10 The fine spinning machine 1 of the present embodiment
includes the winding drum 74 and the cradle lifter. The
winding drum 74 makes contact with the bobbin 48 when the
spun yarn 10 is wound around the bobbin 48. The cradle
lifter cancels the contacting state of the bobbin 48 and
15 the winding drum 74 when the bobbin setting device 60 sets
the bobbin 48 to the bobbin holders 72a and 72b. Since the
bobbin setting device 60 of the present embodiment includes
the above-described configuration, the bobbin 48 can be
reliably set even in an unstable situation in which the
20 bobbin 48 is not in contact with the winding drum 74.
Although a preferred embodiment of the present
invention is described above, the configuration may be
modified as follows, for example.
The configuration of the present invention is not
25 limited to a fine spinning machine, and may be applied to
a bobbin setting device of another kind of yarn winding
machine (an automatic winder, for example).
In the above-described embodiment, the bobbin 48
gripped by the bobbin gripping section 52 is described as
30 a conical bobbin. However, the bobbin gripping section 52
may be capable of gripping a cheese (cylindrical) bobbin.
28 / 39
The configuration of the sliding mechanism 63 may be
appropriately changed, and is not limited to the above
configuration in which the fixed casing 64, the movable
casing 65, and the two slide shafts 66 are provided.
5 In the above embodiment, the gripping-section drive
cylinder 55 is slid with the bobbin gripping section 52.
The gripping-section drive cylinder (the gripping drive
section) 55 may be arranged not to slide. In this case,
since the positional relationship between the bobbin
10 gripping section 52 and the gripping-section drive cylinder
55 is changed by the slide, a transmission mechanism of
drive from the gripping-section drive cylinder 55 to the
bobbin gripping section 52 is preferably further provided.
In the above embodiment, the bobbin gripping section
15 52 is formed of the fixed gripping section 113 and the
movable gripping section 114, and the fixed gripping
section 113 is fixedly provided to the movable casing 65.
In other words, in the bobbin gripping section 52 of the
above-described embodiment, a gripping section (the
20 movable gripping section 114) movable with respect to the
movable casing 65 is only one. However, the configuration
of the bobbin gripping section 52 is not limited thereto,
and two movable gripping sections that are movable with
respect to the movable casing 65 may be provided.
25 According to an aspect of the present invention, a
bobbin setting device includes a bobbin gripping section
and a sliding mechanism. The bobbin gripping section is
adapted to grip a bobbin. The sliding mechanism is adapted
to enable the bobbin gripping section to slide with the
30 bobbin gripped by the bobbin gripping section in an axial
direction of the bobbin by an external, force. The external
29 / 39
force may be a force other than a gripping force of the bobbin
gripping section, applied to the bobbin.
Since the bobbin gripping section can be slid in the
axial direction of the bobbin, the movement of the bobbin
5 is not disturbed. Accordingly, an error in setting the
bobbin can be prevented. Since the slide of the bobbin
gripping section is executed by an external force, such as
the force other than the gripping force of the bobbin
gripping section applied to the bobbin gripped by the bobbin
10 gripping section, a drive source or the like for the sliding
is not required to be provided separately. Accordingly,
the bobbin setting device can be simply configured.
Furthermore, since the bobbin gripping section is slid by
the force applied to the bobbin, a special movement for the
15 slide is not required, and thus an extra time for the slide
movement is not required. Time required for setting the
bobbin thus does not become long.
According to another aspect of the present invention,
a bobbin setting device includes a bobbin gripping section
20 and a sliding mechanism. The bobbin gripping section is
adapted to grip a bobbin. The sliding mechanism is adapted
to enable the bobbin gripping section to slide in an axial
direction of the bobbin gripped by the bobbin gripping
section. The bobbin setting device is not provided with
25 a structure adapted to transmit a driving force for the
slide to the bobbin gripping section.
With a configuration according to the another aspect,
since the bobbin gripping section is slid by the force
applied to the bobbin, the driving force for the slide is
30 transmitted to the bobbin gripping section via the bobbin.
Therefore, the structure for transmitting the driving force
30 / 39
to the bobbin gripping section is not reguired to be
provided separately. Accordingly, the bobbin setting
device can be simply configured.
In the bobbin setting device, the sliding mechanism
5 preferably includes a supporting member adapted to support
the bobbin gripping section, and a slide shaft arranged in
parallel with the axial direction of the bobbin gripped by
the bobbin gripping section and adapted to slidably support
the supporting member.
10 By providing the slide shaft as described above, the
bobbin gripping section can be stably and smoothly slid.
The bobbin setting device preferably further
includes a gripping-section drive source adapted to switch
the bobbin gripping section between a gripping state in
15 which the bobbin gripping section is gripping the bobbin
and a released state in which the bobbin gripping section
has released the bobbin. The sliding mechanism is adapted
to enable the gripping-section drive source to slide with
the bobbin gripping section.
20 In this manner, by sliding the bobbin gripping
section and the gripping-section drive source together, a
positional relationship between the bobbin gripping
section and the gripping-section drive source is not
changed before and after the slide. Accordingly, a
25 transmission mechanism of the driving force from the
gripping-section drive source to the bobbin gripping
section can be simply configured.
The bobbin setting device preferably includes an
urging member adapted to urge the bobbin gripping section
30 towards a standard position.
By the urging force of the urging member, the bobbin
31 / 3 9
gripping section can be held at the standard position.
Accordingly, the bobbin gripping section can be prevented
from unnecessarily sliding by a vibration and/or a shock,
and thereby a position of the bobbin gripped by the bobbin
5 gripping section can be stabilized.
In the bobbin setting device, the urging member is
preferably a spring. The spring is adapted to urge the
bobbin gripping section in a direction opposite to a
direction of the force, which is a force other than the
10 gripping force of the bobbin gripping section, applied to
the bobbin gripped by the bobbin gripping section.
Accordingly, the bobbin gripping section that has
released the holding of the bobbin can be returned to the
standard position by the urging force of the spring.
15 According to further another aspect of the present
invention, a bobbin setting device includes an arm member,
a bobbin gripping section, a sliding mechanism, and an
urging member. The arm member is swingable. The bobbin
gripping section is arranged at a tip-end region of the arm
20 member and is adapted to grip a bobbin. The sliding
mechanism is adapted to enable the bobbin gripping section
to slide with respect to the arm member in an axial direction
of the bobbin gripped by the bobbin gripping section. The
urging member is adapted to urge the bobbin gripping section
25 towards a standard position.
Since a configuration of Patent Document 1 is a
configuration in which a whole arm member is slid,
fluttering or the like occurs at a base-end portion of the
arm member and thus the whole arm member cannot be smoothly
30 slid in some cases. Therefore, as described above, by
configuring the bobbin gripping section to slide with
32 / 39
respect to the arm member, the whole arm member is not
required to be slid. In this manner, since only the bobbin
gripping section that is required to be slid is slid, the
bobbin gripping section can be smoothly slid.
5 According to another aspect of the present invention,
a yarn winding machine includes the above-described bobbin
setting device, a yarn supplying section, and a bobbin
supporting section. The yarn supplying section is adapted
to supply a yarn to be wound around the bobbin. The bobbin
10 supporting section is arranged movable between a supporting
position where the bobbin supporting section can support
the bobbin and a releasing position where the support is
released. The bobbin supporting section is adapted to push
the bobbin gripped by the bobbin gripping section in the
15 axial direction when the bobbin supporting section moves
from the releasing position towards the supporting position.
The bobbin gripping section is adapted to slide with the
bobbin by a force of the bobbin supporting section pushing
the bobbin.
20 When moving the bobbin supporting section from the
releasing position to the supporting position, the bobbin
supporting section pushes the bobbin. By the force for
pushing the bobbin in this manner, the bobbin gripping
section gripping the bobbin can be slid. With the
25 above-described configuration, the movement of the bobbin
supporting section from the releasing position to the
supporting position is not disturbed by the bobbin gripping
section. Accordingly, by the bobbin supporting section
that has moved to the supporting position, the bobbin can
30 be appropriately supported.
In the yarn winding machine, the yarn supplying
3 3 / 3 9
section preferably includes a drafting device and a
pneumatic spinning device. The drafting device is adapted
to draft a fiber bundle. The pneumatic spinning device is
adapted to produce a yarn by applying twists to the fiber
5 bundle, which has been supplied from the drafting device,
using whirling airflow.
In the yarn winding machine including the pneumatic
spinning device, even when the bobbin is being set by the
bobbin setting device, the yarn is continuously spun from
10 the pneumatic spinning device. In order to not waste the
yarn, setting the bobbin needs to be promptly and smoothly
performed. By applying the bobbin setting device of the
present invention to the yarn winding machine including the
pneumatic spinning device, the yarn is prevented from being
15 wasted and the bobbin can be efficiently set.
The above-described yarn winding machine preferably
includes a contact roller and a cancelling section. The
contact roller is adapted to make contact with the bobbin
when the yarn is wound around the bobbin. The cancelling
20 section is adapted to cancel a contacting state of the
bobbin and the contact roller when the bobbin setting device
sets the bobbin to the bobbin supporting section.
Since the position of the bobbin is likely to be
unstable in a state in which the contact between the bobbin
25 and the contact roller has been cancelled, bobbin setting
in this state used to fail in some cases due to such an
unstability. However, with the configuration of the
present invention, an error in setting the bobbin can be
prevented, and thus the bobbin can be reliably set even in
30 an unstable situation in which the bobbin is not in contact
with the contact roller.
34 / 39
We Claim
1. A bobbin setting device comprising:
a bobbin gripping section adapted to grip a bobbin;
and
5 a sliding mechanism adapted to enable the bobbin
gripping section to slide with the bobbin gripped by the
bobbin gripping section in an axial direction of the bobbin
by an external force applied to the bobbin.
10 2. The bobbin setting device according to claim 1,
wherein the force is a force other than a gripping force
of the bobbin gripping section.
3. The bobbin setting device according to clam 1,
15 wherein the bobbin setting device does not comprise a
structure adapted to transmit a driving force for the slide
to the bobbin gripping section.
4 . The bobbin setting device according to any one
20 of claims 1 through 3, wherein the sliding mechanism
includes:
a supporting member adapted to support the bobbin
gripping section; and
a slide shaft arranged in parallel with the axial
25 direction of the bobbin gripped by the bobbin gripping
section and adapted to slidably support the supporting
member.
5. The bobbin setting device according to any one
30 of claim 1 through claim 4, further comprising a
gripping-section drive source adapted to switch the bobbin
35 / 39
gripping section between a gripping state in which the
bobbin gripping section is gripping the bobbin and a
released state in which the bobbin gripping section has
released the bobbin,
5 wherein the sliding mechanism is adapted to enable
the gripping-section drive source to slide with the bobbin
gripping section.
6. The bobbin setting device according to any one
10 of claim 1 through claim 5, further comprising an urging
member adapted to urge the bobbin gripping section toward
a standard position.
7. The bobbin setting device according to claim 6,
15 wherein the urging member is a spring, and the spring is
adapted to urge the bobbin gripping section in a direction
opposite to a direction of the force applied to the bobbin
gripped by the bobbin gripping section, the force being a
force other than the gripping force of the bobbin gripping
20 section.
8. The bobbin setting device according to any one
of claims 1 through 5, comprising:
a swingable arm member;
25 a bobbin gripping section arranged at a tip-end
region of the arm member and adapted to grip a bobbin;
wherein the sliding mechanism is adapted to enable
the bobbin gripping section to slide with respect to the
arm member in an axial direction of the bobbin gripped by
30 the bobbin gripping section; and
an urging member adapted to urge the bobbin gripping
3 6 / 3 9
section towards a standard position.
9. A yarn winding machine comprising:•
the bobbin setting device according to any one of
5 claim 1 through claim 8;
a yarn supplying section adapted to supply a yarn to
be wound around the bobbin; and
a bobbin supporting section arranged movable
between a supporting position where the bobbin supporting
10 section can support the bobbin and a releasing position
where the support is released,
wherein the bobbin supporting section is adapted to
push the bobbin gripped by the bobbin gripping section in
the axial direction when the bobbin supporting section
15 moves from the releasing position towards the supporting
position, and
the bobbin gripping section is adapted to slide with
the bobbin by a force of the bobbin supporting section
pushing the bobbin.
20
10. The yarn winding machine according to claim 9,
wherein the yarn supplying section includes:
a drafting device adapted to draft a fiber bundle;
and
25 a pneumatic spinning device adapted to produce the
yarn by applying twists to the fiber bundle, which has been
supplied from the drafting device, using whirling airflow.
11. The yarn winding machine according to claim 9
30 or claim 10, further comprising:
a contact roller adapted to make contact with the
37 / 39
bobbin when the yarn is wound around the bobbin; and
a cancelling section adapted to cancel a contacting
state of the bobbin and the contact roller when the bobbin
setting device sets the bobbin to the bobbin supporting
section.