2
PNEUMATIC SPINNING DEVICE AND SPINNING MACHINE
BACKGROUND OF THE INVENTION
1. Field of the Invention
5 This invention relates to a pneumatic spinning
device and a spinning machine.
2. Description of the Related Art
There is known a pneumatic spinning device
10 including: a nozzle block provided with a spinning
chamber; and a hollow guide shaft body unit provided
with a fiber introduction port arranged in the spinning
chamber, in which the pneumatic spinning device is
capable of moving the hollow guide shaft body unit to
15 approach and separate with respect to the nozzle block
(see, for example, JP 2013-067895 A).
In the pneumatic spinning device as described above,
the hollow guide shaft body unit can be separated from
the nozzle block, and in that state, maintenance of the
20 hollow guide shaft body unit can be performed (for
example, visual confirmation, removal of fiber pieces,
replacement of components, and the like). Therefore, it
is convenient for an operator.
3
BRIEF SUMMARY OF THE INVENTION
An object of the present invention is to provide
a pneumatic spinning device and a spinning machine that
are more convenient for an operator.
5 A pneumatic spinning device comprises: a nozzle
block provided with a spinning chamber, a fiber guide
hole through which a fiber bundle is guided to the
spinning chamber, and a nozzle through which air to be
injected into the spinning chamber passes; a hollow guide
10 shaft body unit provided with a fiber introduction port
arranged in the spinning chamber; a first supporting
section configured to support the nozzle block; a second
supporting section attached to the first supporting
section to be swingable about a first shaft, the second
15 supporting section being configured to support the
hollow guide shaft body unit to be swingable about a
second shaft; and a link attached to the hollow guide
shaft body unit to be swingable about a third shaft, the
link being attached to the first supporting section to
20 be swingable about a fourth shaft, wherein in a cross
section orthogonal to an axial direction of the first
shaft, the third shaft and the fourth shaft are located
on an opposite side to the nozzle block with respect to
a first line segment connecting the first shaft and the
4
second shaft at a shortest distance, in the cross section,
a first angle formed by the first line segment and a
second line segment connecting the second shaft and the
third shaft at a shortest distance is an acute angle, in
5 the cross section, a second angle formed by an extension
line of the first line segment and an extension line of
a third line segment connecting the third shaft and the
fourth shaft at a shortest distance is smaller than the
first angle, a length of the second line segment is
10 shorter than a length of the first line segment, and a
length of the third line segment is shorter than a length
of the second line segment.
A spinning machine comprises: a draft device
configured to produce a fiber bundle; the pneumatic
15 spinning device, the pneumatic spinning device being
configured to twist the fiber bundle with a whirling
airflow to produce a yarn; and a winding device
configured to wind the yarn to form a package.
20 BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of a spinning machine
according to one embodiment;
FIG. 2 is a cross-sectional view of a part of a
pneumatic spinning device of one embodiment;
5
FIG. 3 is a side view of a pneumatic spinning
device of one embodiment;
FIG. 4 is a side view of the pneumatic spinning
device in a state where a nozzle block and a hollow guide
5 shaft body unit are located at a first separated
position; and
FIG. 5 is a side view of the pneumatic spinning
device in a state where the hollow guide shaft body unit
is located at a second separated position.
10
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Hereinafter, an embodiment of the present
invention will be described in detail with reference to
the drawings. Note that the same reference numerals are
15 denoted on the same or corresponding parts throughout
the drawings, and redundant description will be omitted.
[Configuration of spinning machine]
As illustrated in FIG. 1, a spinning machine 1
includes a plurality of spinning units 2 and a plurality
20 of unit controllers 100. The plurality of spinning units
2 are arranged in a row. Each spinning unit 2 drafts a
sliver S to produce a fiber bundle F, twists the fiber
bundle F by a whirling airflow to produce a yarn Y, and
winds the yarn Y around a bobbin B to form a package P.
6
Each unit controller 100 is provided for every
predetermined number (one or more) of the spinning units
2, and controls an operation of the spinning unit(s) 2.
The spinning machine 1 is provided with a machine control
5 device (not illustrated) that is a higher-level
controller of the plurality of unit controllers 100.
Hereinafter, an upstream side in a travelling
direction of the sliver S, the fiber bundle F, and the
yarn Y is referred to as "upstream side", and a
10 downstream side in the travelling direction is referred
to as "downstream side". One side (for example, a work
passage side) in a direction perpendicular to an
arrangement direction of the plurality of spinning units
2 in a horizontal direction is referred to as "front
15 side", and another side in such a direction is referred
to as "rear side". An upper side in a vertical direction
is referred to as "upper side", and a lower side in the
vertical direction is referred to as "lower side".
Each spinning unit 2 includes a draft device 3, a
20 pneumatic spinning device 4, a yarn monitoring device 5,
a yarn accumulating device 6, a yarn joining device 7,
a winding device 8, a first catching guide device 9a,
and a second catching guide device 9b. The draft device
3, the pneumatic spinning device 4, the yarn monitoring
7
device 5, the yarn accumulating device 6, the yarn
joining device 7, and the winding device 8 are arranged
in this order from the upstream side to the downstream
side.
5 As an example, the travelling direction of the
sliver S, the fiber bundle F, and the yarn Y from the
draft device 3 to the yarn accumulating device 6 is a
direction from the front side to the rear side, and is
inclined to the upper side with respect to the horizontal
10 direction. The travelling direction of the yarn Y from
the yarn accumulating device 6 to the winding device 8
is a direction from the lower side to the upper side,
and is inclined to the front side with respect to the
vertical direction. In each spinning unit 2, the
15 travelling direction of the yarn Y is switched in the
yarn accumulating device 6.
The draft device 3 drafts the sliver S to produce
the fiber bundle F. The pneumatic spinning device 4
produces the yarn Y by twisting the fiber bundle F
20 drafted by the draft device 3, with a whirling airflow.
While accumulating the yarn Y on a yarn accumulating
roller to absorb fluctuation of tension generated in the
yarn Y on the downstream side of the yarn accumulating
device 6, the yarn accumulating device 6 stably draws
8
out the yarn Y from the pneumatic spinning device 4.
The winding device 8 winds the yarn Y drawn out by
the yarn accumulating device 6 onto the bobbin B to form
the package P. The winding device 8 has a cradle arm 8a
5 and a winding drum 8b. The cradle arm 8a rotatably
supports the bobbin B. The winding drum 8b rotates the
bobbin B or the package P while making contact with the
bobbin B or the package P. On a surface of the winding
drum 8b, a traverse groove (not illustrated) is formed
10 for traversing the yarn Y when winding the yarn Y.
The yarn monitoring device 5 monitors information
of the travelling yarn Y and detects the presence or
absence of a yarn defect on the basis of the monitored
information. When detecting the yarn defect, the yarn
15 monitoring device 5 transmits a yarn defect detection
signal to the unit controller 100. When receiving the
yarn defect detection signal, in order to cut the yarn
Y, the unit controller 100 stops production of the fiber
bundle F by the draft device 3 and production of the
20 yarn Y by the pneumatic spinning device 4, to interrupt
supply of the yarn Y. When receiving the yarn defect
detection signal, the unit controller 100 may operate,
for example, a cutter (not illustrated) to cut the yarn
Y. In this case, the yarn monitoring device 5 may have
9
the cutter.
The yarn joining device 7 joins the yarn Y from
the pneumatic spinning device 4 and the yarn Y from the
package P, when the yarn Y is cut or the yarn Y is broken
5 for some reason. The yarn joining device 7 is a splicer
device configured to twist yarn ends by a whirling
airflow. Each of the first catching guide device 9a and
the second catching guide device 9b is swingable about
a base end portion. Before the yarn joining is performed,
10 the first catching guide device 9a is swung toward the
lower side to catch the yarn Y from the pneumatic
spinning device 4 with a suction airflow, and then is
swung toward the upper side to guide the yarn Y from the
pneumatic spinning device 4 to the yarn joining device
15 7. Before the yarn joining is performed, the second
catching guide device 9b is swung toward the upper side
to catch the yarn Y from the package P by a suctioned
airflow, and then is swung toward the lower side to guide
the yarn Y from the package P to the yarn joining device
20 7.
[Configuration of pneumatic spinning device]
As illustrated in FIG. 2, the pneumatic spinning
device 4 includes a nozzle block 10 and a hollow guide
shaft body unit 20.
10
The nozzle block 10 has a fiber guiding section 11,
a whirling airflow generation section 12, and a first
holder 13.
The fiber guiding section 11 is provided with a
5 fiber guide hole 11a. The whirling airflow generation
section 12 is provided with a spinning chamber 14, a
plurality of first nozzles (air injection holes) 15, and
an opening 16. The first holder 13 has a frame shape
and defines a space 17. The fiber bundle F is guided to
10 the spinning chamber 14 through the fiber guide hole 11a
from a pair of rollers 3a located most downstream among
the plurality of pairs of rollers included in the draft
device 3. Each of the first nozzles 15 is formed in the
whirling airflow generation section 12 so that the air
15 to be injected into the spinning chamber 14 passes
through. In the spinning chamber 14, a whirling airflow
is generated by air injection from the plurality of first
nozzles 15, and the fiber bundle F introduced from the
fiber guide hole 11a is whirled by the whirling airflow.
20 The opening 16 has a truncated cone shape that widens
toward the downstream side. The opening 16 is formed
continuously from the spinning chamber 14, and opens to
the space 17 on the downstream side.
Inside the spinning chamber 14, a distal end
11
portion 18a of a needle 18 held by the fiber guiding
section 11 is arranged.
The hollow guide shaft body unit 20 includes a
hollow guide shaft body 21, a guide pipe 22, a supporting
5 member 23, a fixing member 24, and a second holder
(holder) 25.
The hollow guide shaft body 21 includes a distal
end portion 21a, a main body portion 21b, and a flange
portion 21c. The distal end portion 21a has a truncated
10 cone shape that widens toward the downstream side. The
main body portion 21b has a tubular shape and is
connected to a downstream end portion of the distal end
portion 21a. The flange portion 21c surrounds a
downstream end portion of the main body portion 21b. At
15 the distal end portion 21a, a fiber introduction path 26
is provided. An upstream opening of the fiber
introduction path 26 is a fiber introduction port 27.
The fiber introduction path 26 also has an opening to an
inside of the main body portion 21b. The hollow guide
20 shaft body 21 is integrally formed of ceramic, for
example.
The guide pipe 22 is provided with a yarn passage
22a and a plurality of second nozzles 22b. The yarn
passage 22a has an opening on the upstream side and the
12
downstream side. Each second nozzle 22b has an opening
inside the yarn passage 22a and outside the guide pipe
22, at an upstream end portion of the guide pipe 22.
The supporting member 23 is provided with a housing
5 hole 23a, a yarn lead-out path 23b, and a pipe connection
port 23c. The housing hole 23a has an opening on the
upstream side. The yarn lead-out path 23b has an opening
in the housing hole 23a and on the downstream side. The
pipe connection port 23c has an opening inside the
10 housing hole 23a and outside the supporting member 23.
The pipe connection port 23c is connected with an air
supply pipe 60 through which air to be supplied to the
hollow guide shaft body unit 20 passes. At the upstream
end portion of the supporting member 23, a male screw
15 23d is provided.
The fixing member 24 is a cap-shaped nut provided
with a flange portion 24a. In the hollow guide shaft
body unit 20, the guide pipe 22 is arranged in the
housing hole 23a of the supporting member 23, and the
20 hollow guide shaft body 21 is arranged on the upstream
end portion of the supporting member 23 so as to cover
an upstream end portion of the guide pipe 22. In the
hollow guide shaft body unit 20, the fiber introduction
path 26 of the hollow guide shaft body 21 and the yarn
13
passage 22a of the guide pipe 22 are connected, and the
yarn passage 22a of the guide pipe 22 and the yarn leadout path 23b of the supporting member 23 are connected.
In this state, the fixing member 24 is engaged with the
5 flange portion 21c of the hollow guide shaft body 21,
and is screwed with the male screw 23d of the supporting
member 23.
The second holder 25 holds the supporting member
23. In the hollow guide shaft body unit 20, the hollow
10 guide shaft body 21 can be attached to and detached from
the second holder 25 by attaching and detaching the
fixing member 24 to and from the supporting member 23.
That is, the second holder 25 detachably holds the hollow
guide shaft body 21.
15 During the spinning operation of the pneumatic
spinning device 4, the flange portion 24a of the fixing
member 24 is in contact with the first holder 13. In
this state, the hollow guide shaft body unit 20 is
positioned with respect to the nozzle block 10, and the
20 space 17 is closed. In a state where the hollow guide
shaft body unit 20 is positioned with respect to the
nozzle block 10, a part of the hollow guide shaft body
21 (specifically, the distal end portion 21a and the
upstream end portion of the main body portion 21b) is
14
arranged in the opening 16 of the whirling airflow
generation section 12 with a gap C, and the fiber
introduction port 27 of the hollow guide shaft body 21
is arranged in the spinning chamber 14.
5 The spinning operation of the pneumatic spinning
device 4 will be described. At a start of the spinning
operation, air is injected from the plurality of first
nozzles 15 into the spinning chamber 14, and air is
injected from the plurality of second nozzles 22b into
10 the yarn passage 22a. This causes the fiber bundle F
supplied from the draft device 3 to be introduced into
the spinning chamber 14 through the fiber guide hole 11a,
and the introduced fiber bundle F to be led out to the
downstream side through the yarn passage 22a and the
15 yarn lead-out path 23b. Note that the air injected from
each second nozzle 22b passes through the air supply
pipe 60, a space outside the guide pipe 22 in the housing
hole 23a, and a space between the inside of the hollow
guide shaft body 21 and the outside of the guide pipe
20 22, to reach the second nozzles 22b.
After that, the injection of air from the plurality
of first nozzles 15 to the spinning chamber 14 is
continued, and the injection of air from the plurality
of second nozzles 22b to the yarn passage 22a is stopped.
15
As a result, in the spinning chamber 14, fiber ends of
the fiber bundle F are reversed and whirled around the
distal end portion 21a of the hollow guide shaft body 21
by the whirling airflow, and the fiber bundle F is
5 actually twisted. At this time, the distal end portion
18a of the needle 18 arranged in the spinning chamber 14
prevents the twists in the fiber bundle F from being
propagated to upstream. The yarn Y produced by actually
twisting the fiber bundle F is led out to the downstream
10 side through the yarn passage 22a and the yarn lead-out
path 23b. Note that the air injected from the plurality
of first nozzles 15 into the spinning chamber 14 flows
into the space 17 functioning as a decompression chamber,
through the gap C between the hollow guide shaft body 21
15 and the opening 16, to be discharged together with the
fibers that have not become the yarn Y.
As illustrated in FIG. 3, the pneumatic spinning
device 4 further includes a first supporting section 30,
a second supporting section 40, a link 50, the air supply
20 pipe 60, a regulating section 71, an air cylinder (a
driving section) 72, a first coil spring 73, a second
coil spring 74, and a yarn detector 75. Hereinafter, a
travelling direction of the fiber bundle F and the yarn
Y is referred to as an X direction, a direction
16
perpendicular to the X direction in the horizontal
direction is referred to as a Y direction, and a
direction perpendicular to both the X direction and the
Y direction is referred to as a Z direction.
5 The first supporting section 30 supports the nozzle
block 10. The first supporting section 30 has a pair of
first supporting members 31 arranged in parallel in the
Y direction. Each first supporting member 31 extends
along the Z direction. The nozzle block 10 is supported
10 by the first supporting section 30 by fixing the first
holder 13 of the nozzle block 10 to an upper end portion
of each first supporting member 31. The first supporting
section 30 further includes a bracket 32 configured to
support the link 50 and the air supply pipe 60. The
15 bracket 32 includes a pair of mounting plates 32a
arranged in the Y direction.
The second supporting section 40 is attached to
the first supporting section 30 so as to be swingable
about a first shaft 81. The hollow guide shaft body
20 unit 20 is supported by the second supporting section 40
so as to be swingable about a second shaft 82. The
second supporting section 40 has a pair of second
supporting members 41 arranged in the Y direction. Each
second supporting member 41 extends along the Z direction.
17
The second supporting section 40 is configured to
be swingable about the first shaft 81 by a lower end
portion of each second supporting member 41 being
connected to a lower end portion of each first supporting
5 member 31 via the first shaft 81. The second supporting
member 41 has an upper end portion on a side where the
hollow guide shaft body unit 20 is arranged and a lower
end portion on an opposite side thereto. The first
supporting member 31 has an upper end portion on a side
10 where the nozzle block 10 is arranged and a lower end
portion on an opposite side thereto. In the present
specification, "upper end portion" and "lower end
portion" are names for convenience in the description
with reference to FIG. 3, for example, and are not names
15 that limit an actual direction.
The second supporting section 40 is configured to
be swingable about the second shaft 82 by an upper end
portion of each second supporting member 41 being
connected to the second holder 25 of the hollow guide
20 shaft body unit 20 via the second shaft 82. That is,
the second shaft 82 is provided to the second holder 25
of the hollow guide shaft body unit 20. Respective
center lines of the first shaft 81 and the second shaft
82 extend along the Y direction.
18
The link 50 is attached to the hollow guide shaft
body unit 20 so as to be swingable about a third shaft
83. The link 50 is attached to the first supporting
section 30 so as to be swingable about a fourth shaft
5 84. The link 50 has a pair of link members 51 arranged
in the Y direction. The link 50 is configured to be
swingable about the third shaft 83 by one end portion of
each link member 51 being connected to the second holder
25 of the hollow guide shaft body unit 20 via the third
10 shaft 83. The link 50 is configured to be swingable
about the fourth shaft 84 by another end portion of each
link member 51 being connected to each mounting plate
32a of the bracket 32 via the fourth shaft 84.
Respective center lines of the third shaft 83 and the
15 fourth shaft 84 extend along the Y direction.
When viewed from the Y direction, the third shaft
83 and the fourth shaft 84 are located on an opposite
side to the nozzle block 10 with respect to a first line
segment S1 connecting the first shaft 81 and the second
20 shaft 82 at a shortest distance. "When viewed from the
Y direction" is the same as when viewed in a cross
section orthogonal to an axial direction of the first
shaft 81. When viewed from the Y direction, a first
angle θ1 formed by the first line segment S1 and a second
19
line segment S2 connecting the second shaft 82 and the
third shaft 83 at a shortest distance is an acute angle.
When viewed from the Y direction, a second angle θ2
formed by an extension line of the first line segment S1
5 and an extension line of a third line segment S3
connecting the third shaft 83 and the fourth shaft 84 is
less than the first angle θ1. When viewed from the Y
direction, a length of the second line segment S2 is
shorter than a length of the first line segment S1, and
10 a length of the third line segment S3 is shorter than a
length of the second line segment S2.
In the present embodiment, when viewed from the Y
direction, a distance (shortest distance) between the
third shaft 83 and the second shaft 82 is shorter than
15 a distance (shortest distance) between the third shaft
83 and the first shaft 81. Further, a distance (shortest
distance) between the fourth shaft 84 and the second
shaft 82 is shorter than a distance (shortest distance)
between the fourth shaft 84 and the first shaft 81. That
20 is, when viewed from the Y direction, the third shaft 83
and the fourth shaft 84 are located on the second shaft
82 side with respect to a midpoint of the first line
segment S1 in a direction parallel to the first line
segment S1.
20
Each link member 51 is provided with a convex
portion 52 and a concave portion 53. On each mounting
plate 32a of the bracket 32, a pin 33 is provided. When
the link 50 is swung about the fourth shaft 84 toward
5 the nozzle block 10, the pin 33 comes into contact with
an outer surface of the convex portion 52. When the
link 50 is swung about the fourth shaft 84 toward the
opposite side to the nozzle block 10, the pin 33 comes
into contact with the inner surface of the concave
10 portion 53. In the pneumatic spinning device 4, the
convex portion 52, the concave portion 53, and the pin
33 constitutes the regulating section 71. The
regulating section 71 is provided to the first supporting
section 30 and the link 50, and regulates a swing range
15 of the hollow guide shaft body unit 20 about the second
shaft 82.
The air cylinder 72 is a driving section configured
to separate the hollow guide shaft body unit 20 that is
in contact with the nozzle block 10, from the nozzle
20 block 10. A base end portion of a cylinder tube 72a of
the air cylinder 72 is swingably attached to a frame
(not illustrated) of the spinning unit 2 (see FIG. 1).
A distal end portion of a piston rod 72b of the air
cylinder 72 is attached to the second supporting section
21
40.
The first coil spring 73 is extended between the
frame of the spinning unit 2 and the second supporting
section 40. The first coil spring 73 urges the second
5 supporting section 40 so that the nozzle block 10 and
the hollow guide shaft body unit 20 are located in a
spinning position while being in contact with each other.
The spinning position is a position of the nozzle block
10 and the hollow guide shaft body unit 20 when the
10 spinning operation is performed, and is a position where
the fiber guiding section 11 of the nozzle block 10 is
close to the pair of rollers 3a of the draft device 3.
In the pneumatic spinning device 4, by the first
supporting section 30 coming into contact with a first
15 stopper 91 provided on the frame of the spinning unit 2,
a state is maintained in which the nozzle block 10 and
the hollow guide shaft body unit 20 are located at the
spinning position.
The second coil spring 74 is extended between the
20 first supporting section 30 and the second supporting
section 40. The second coil spring 74 urges the second
supporting section 40 so that the hollow guide shaft
body unit 20 comes into contact with the nozzle block
10.
22
The yarn detector 75 is attached to the second
supporting section 40 so as to be placed over a pair of
second supporting members 41. The yarn detector 75
detects the fiber bundle F or the yarn Y led out from
5 the hollow guide shaft body unit 20.
The air supply pipe 60 has a pipe joint section 61,
a first pipe section 62, and a second pipe section 63.
The pipe joint section 61 is attached to the first
supporting section 30 so as to be swingable about a fifth
10 shaft 85. Specifically, the pipe joint section 61 is
swingably attached to the fifth shaft 85 that is provided
between the pair of mounting plates 32a in the bracket
32.
The pipe joint section 61 is provided with a first
15 connection port 61a and a second connection port 61b.
The first connection port 61a faces an opposite
side to the first supporting section 30. To the first
connection port 61a, one end portion of the first pipe
section 62 is connected. Another end portion of the
20 first pipe section 62 is connected to an air supply
source (not illustrated). That is, the first pipe
section 62 is connected to the air supply source and the
first connection port 61a. The first pipe section 62 is
an elastic pipe.
23
The second connection port 61b faces toward the
hollow guide shaft body unit 20. To the second
connection port 61b, one end portion of the second pipe
section 63 is connected. Another end portion of the
5 second pipe section 63 is connected to the pipe
connection port 23c (see FIG. 2) of the hollow guide
shaft body unit 20. That is, the second pipe section 63
is connected to the second connection port 61b and the
hollow guide shaft body unit 20. The second pipe section
10 63 is an elastic pipe.
[Swing operation of pneumatic spinning device]
In the pneumatic spinning device 4, when the
spinning operation is stopped, for example, the nozzle
block 10 and the hollow guide shaft body unit 20 are
15 swung to a second separated position via a first
separated position, and the maintenance and the like of
the hollow guide shaft body unit 20 is performed. As
illustrated in FIG. 4, the first separated position is
a position where the nozzle block 10 and the hollow guide
20 shaft body unit 20 have been swung about the first shaft
81 so as to be separated from the pair of rollers 3a of
the draft device 3 while being in contact with each other.
The second separated position is a position where the
hollow guide shaft body unit 20 has been swung about the
24
first shaft 81 so as to be separated from the nozzle
block 10 located at the first separated position, as
illustrated in FIG. 5. Hereinafter, the swing operation
of the pneumatic spinning device 4 will be described
5 with reference to FIGS. 4 and 5. Note that, in FIGS. 4
and 5, the air cylinder 72 and the first coil spring 73
are not illustrated.
When the air cylinder 72 extends in a state where
the nozzle block 10 and the hollow guide shaft body unit
10 20 are located at the spinning position (see FIG. 3),
the second supporting section 40 is swung about the first
shaft 81 against an urging force of the first coil spring
73. As a result, as illustrated in FIG. 4, the nozzle
block 10 and the hollow guide shaft body unit 20 are
15 swung about the first shaft 81 so as to be separated
from the pair of rollers 3a of the draft device 3 while
being in contact with each other. Note that the nozzle
block 10 and the hollow guide shaft body unit 20 are
swung while being in contact with each other due to the
20 action of the urging force of the second coil spring 74.
When the air cylinder 72 (see FIG. 3) further
extends while the nozzle block 10 and the hollow guide
shaft body unit 20 are located at the first separated
position (see FIG. 4), the second supporting section 40
25
is further swung about the first shaft 81 against the
urging force of the first coil spring 73 (see FIG. 3)
and the second coil spring 74. As a result, as
illustrated in FIG. 5, the hollow guide shaft body unit
5 20 is swung about the first shaft 81 so as to be separated
from the nozzle block 10 located at the first separated
position. Note that a state where the nozzle block 10
is located at the first separated position is maintained
by the contact of the first supporting section 30 with
10 a second stopper 92 provided on the frame of the spinning
unit 2.
As illustrated in FIG. 5, when the hollow guide
shaft body unit 20 is swung about the first shaft 81 so
as to be separated from the nozzle block 10 located at
15 the first separated position, the hollow guide shaft
body unit 20 is swung about the second shaft 82 toward
an opposite side to the first shaft 81 by a four-node
link mechanism including the first shaft 81, the second
shaft 82, the third shaft 83, and the fourth shaft 84.
20 In the present embodiment, the first shaft 81, the second
shaft 82, the third shaft 83, and the fourth shaft 84
are arranged such that when the second supporting section
40 is swung about the first shaft 81 with respect to the
first supporting section 30 such that the hollow guide
26
shaft body unit 20 in contact with the nozzle block 10
is separated from the nozzle block 10, the hollow guide
shaft body unit 20 is swung about the second shaft 82
toward the first shaft 81 and then is swung about the
5 second shaft 82 toward the opposite side to the first
shaft 81.
Before starting (restarting) of the drafting
operation by the draft device 3 and the spinning
operation by the pneumatic spinning device 4, the hollow
10 guide shaft body unit 20 located at the second separated
position moves so as to come into contact with the nozzle
block 10, and then the nozzle block 10 and the hollow
guide shaft body unit 20 move from the first separated
position to the spinning position. After the nozzle
15 block 10 and the hollow guide shaft body unit 20 are
located at the spinning position, the drafting operation
by the draft device 3 and the spinning operation by the
pneumatic spinning device 4 are started (restarted).
[Action and effect]
20 In the pneumatic spinning device 4, when the second
supporting section 40 is swung about the first shaft 81
with respect to the first supporting section 30 such
that the hollow guide shaft body unit 20 in contact with
the nozzle block 10 is separated from the nozzle block
27
10 (hereinafter, such an operation is referred to as
"opening operation"), the hollow guide shaft body unit
20 is accordingly swung about the second shaft 82 toward
the opposite side to the first shaft 81 (hereinafter,
5 such an operation is referred to as "oscillating
operation"). Therefore, according to the pneumatic
spinning device 4, for example, convenience for an
operator is further improved as compared with when the
oscillating operation of the hollow guide shaft body
10 unit 20 is not performed in association with performance
of the opening operation of the hollow guide shaft body
unit 20.
In the pneumatic spinning device 4, in a cross
section (FIG. 3) orthogonal to an axial direction of the
15 first shaft 81, a distance (shortest distance) between
the third shaft 83 and the second shaft 82 is shorter
than a distance (shortest distance) between the third
shaft 83 and the first shaft 81, and a distance (shortest
distance) between the fourth shaft 84 and the second
20 shaft 82 is shorter than a distance (shortest distance)
between the fourth shaft 84 and the first shaft 81. This
allows, when the opening operation of the hollow guide
shaft body unit 20 is performed, the oscillating
operation of the hollow guide shaft body unit 20 to be
28
largely performed in the latter half of the opening
operation. As a result, it is possible to prevent
physical interference of the hollow guide shaft body
unit 20 with the nozzle block 10 when the opening
5 operation of the hollow guide shaft body unit 20 is
performed.
In the pneumatic spinning device 4, the first shaft
81, the second shaft 82, the third shaft 83, and the
fourth shaft 84 are arranged such that when the second
10 supporting section 40 is swung about the first shaft 81
with respect to the first supporting section 30 such
that the hollow guide shaft body unit 20 in contact with
the nozzle block 10 is separated from the nozzle block
10, the hollow guide shaft body unit 20 is swung about
15 the second shaft 82 toward the first shaft 81 and then
is swung about the second shaft 82 toward the opposite
side to the first shaft 81. This makes it possible to
prevent physical interference of the hollow guide shaft
body unit 20 with the nozzle block 10 when the opening
20 operation of the hollow guide shaft body unit 20 is
performed, by effectively using the gap C formed between
the hollow guide shaft body unit 20 and the nozzle block
10 when the hollow guide shaft body unit 20 is in contact
with the nozzle block 10.
29
In the pneumatic spinning device 4, the air supply
pipe 60 has the pipe joint section 61 attached to the
first supporting section 30 so as to be swingable about
the fifth shaft 85. This makes it possible to prevent
5 physical interference of the air supply pipe 60 with
each section of the pneumatic spinning device 4 when the
opening operation and the oscillating operation of the
hollow guide shaft body unit 20 are performed.
In the pneumatic spinning device 4, the pipe joint
10 section 61 is provided with the first connection port
61a facing an opposite side to the first supporting
section 30 and the second connection port 61b facing
toward the hollow guide shaft body unit 20. This enables
optimization of arrangement of the air supply pipe 60.
15 In the pneumatic spinning device 4, in the air
supply pipe 60, the first pipe section 62 connected to
the first connection port 61a is an elastic pipe, and
the second pipe section 63 connected to the second
connection port 61b and the hollow guide shaft body unit
20 20 is an elastic pipe. Accordingly, the opening
operation and the oscillating operation of the hollow
guide shaft body unit 20 can be prevented from being
obstructed by the air supply pipe 60.
In the pneumatic spinning device 4, the hollow
30
guide shaft body unit 20 has the second holder 25
provided with the second shaft 82, and the hollow guide
shaft body 21 detachably held by the second holder 25.
Accordingly, the hollow guide shaft body 21 can be easily
5 attached to and detached from the second holder 25 during
maintenance.
In the pneumatic spinning device 4, a swing range
of the hollow guide shaft body unit 20 about the second
shaft 82 is regulated by the regulating section 71
10 provided to the first supporting section 30 and the link
50. This allows the hollow guide shaft body unit 20 to
be accurately positioned with respect to the nozzle block
10 in each of a state where the hollow guide shaft body
unit 20 is in contact with the nozzle block 10 and a
15 state where the hollow guide shaft body unit 20 is
separated from the nozzle block 10. Furthermore, the
link 50 can be prevented from swinging more than expected
and becoming unable to return to its original state.
In the pneumatic spinning device 4, the air
20 cylinder 72 separates the hollow guide shaft body unit
20 that is in contact with the nozzle block 10, from the
nozzle block 10. Accordingly, the opening operation and
the oscillating operation of the hollow guide shaft body
unit 20 can be automatically and reliably performed.
31
In the pneumatic spinning device 4, the first shaft
81, the second shaft 82, the third shaft 83, and the
fourth shaft 84 may be provided in parallel with each
other. Accordingly, the opening operation and the
5 oscillating operation of the hollow guide shaft body
unit 20 can be reliably performed with a compact
configuration.

The present invention is not limited to the
10 embodiment described above. For example, the distance
between the third shaft 83 and the second shaft 82 need
not be shorter than the distance between the third shaft
83 and the first shaft 81. The distance between the
fourth shaft 84 and the second shaft 82 need not be
15 shorter than the distance between the fourth shaft 84
and the first shaft 81.
The first shaft 81, the second shaft 82, the third
shaft 83, and the fourth shaft 84 may be arranged such
that when the second supporting section 40 is swung about
20 the first shaft 81 with respect to the first supporting
section 30 such that the hollow guide shaft body unit 20
in contact with the nozzle block 10 is separated from
the nozzle block 10, the hollow guide shaft body unit 20
is swung about the second shaft 82 toward the opposite
32
side to the first shaft 81 without being swung about the
second shaft 82 toward the first shaft 81.
The driving section that separates the hollow guide
shaft body unit 20 in contact with the nozzle block 10
5 from the nozzle block 10 may be an actuator (a motor or
the like) other than the air cylinder 72.
The configuration of the pneumatic spinning device
4 is also not limited to the embodiment described above.
For example, the fiber guiding section 11 of the nozzle
10 block 10 need not be provided with the needle 18. Each
section may be formed to have a different number of
components from the embodiment. For example, the fiber
guiding section 11 and the whirling airflow generation
section 12 may be integrally configured. Each section
15 of the pneumatic spinning device 4 is not limited to the
illustrated shape.
The pneumatic spinning device 4 may not be provided
with the yarn detector 75.
In the spinning unit 2, the travelling direction
20 of the yarn Y has been switched in the yarn accumulating
device 6, but the travelling direction of the yarn Y
need not be switched in the yarn accumulating device 6.
In the spinning unit 2, each device may be arranged such
that the yarn Y supplied at the upper side is wound at
33
the lower side.
In order to draw out the yarn Y from the pneumatic
spinning device 4, a delivery roller and a nip roller
may be arranged between the pneumatic spinning device 4
5 and the yarn accumulating device 6. When the delivery
roller and the nip roller are provided, instead of the
yarn accumulating device 6, there may be provided a slack
tube that absorbs slackening of the yarn Y with a suction
airflow, a mechanical compensator, or the like.
10 The yarn monitoring device 5 may be arranged
between the yarn accumulating device 6 and the winding
device 8.
The yarn joining device 7, the first catching guide
device 9a, and the second catching guide device 9b may
15 be provided in a yarn joining cart that is movable along
an arrangement direction of the spinning units 2. A
yarn drawing device that draws the yarn Y from the
package P when yarn joining is performed may be provided
to a doffing cart that can move along the arrangement
20 direction of the spinning units 2.
The yarn joining device 7 may be a mechanical
knotter or the like. Alternatively, yarn joining may be
performed by restarting the draft of the sliver S by the
draft device 3 and the production of the yarn Y by the
34
pneumatic spinning device 4 in a state where the yarn Y
from the package P has been reversely fed to the
pneumatic spinning device 4. In this case, the second
nozzle 22b is formed in the hollow guide shaft body 21
5 so that air is injected in a direction in which the yarn
Y can be reversely fed.
In the winding device 8, the traverse groove may
not be formed on the surface of the winding drum 8b, and
a traverse device provided separately may traverse the
10 yarn Y when the yarn Y is wound on the bobbin B by. In
the winding device 8, the bobbin B may be driven to
rotate, and the winding drum 8b making contact with the
bobbin B may be rotated accordingly.
A pneumatic spinning device according to the
15 present invention includes: a nozzle block provided with
a spinning chamber, a fiber guide hole through which a
fiber bundle is guided to the spinning chamber, and a
nozzle through which air to be injected into the spinning
chamber passes; a hollow guide shaft body unit provided
20 with a fiber introduction port arranged in the spinning
chamber; a first supporting section configured to
support the nozzle block; a second supporting section
that is attached to the first supporting section to be
swingable about a first shaft, and is configured to
35
support the hollow guide shaft body unit to be swingable
about a second shaft; and a link that is attached to the
hollow guide shaft body unit to be swingable about a
third shaft, and is attached to the first supporting
5 section to be swingable about a fourth shaft. In a cross
section orthogonal to an axial direction of the first
shaft, the third shaft and the fourth shaft are located
on an opposite side to the nozzle block with respect to
a first line segment connecting the first shaft and the
10 second shaft at a shortest distance, a first angle formed
by the first line segment and a second line segment
connecting the second shaft and the third shaft at a
shortest distance is an acute angle in the cross section,
a second angle formed by an extension line of the first
15 line segment and an extension line of a third line
segment connecting the third shaft and the fourth shaft
at a shortest distance is smaller than the first angle
in the cross section, a length of the second line segment
is shorter than a length of the first line segment, and
20 a length of the third line segment is shorter than a
length of the second line segment.
In this pneumatic spinning device, when the second
supporting section is swung about the first shaft with
respect to the first supporting section such that the
36
hollow guide shaft body unit in contact with the nozzle
block is separated from the nozzle block (in this section,
such an operation is referred to as "opening operation"),
the hollow guide shaft body unit is accordingly swung
5 about the second shaft toward an opposite side to the
first shaft (in this section, such an operation is
referred to as "oscillating operation"). Therefore,
according to this pneumatic spinning device, for example,
convenience for an operator is further improved as
10 compared with when the oscillating operation of the
hollow guide shaft body unit is not performed in
association with performance of the opening operation of
the hollow guide shaft body unit.
In the pneumatic spinning device of the present
15 invention, in a cross section, a shortest distance
between the third shaft and the second shaft may be
shorter than a shortest distance between the third shaft
and the first shaft, and, in a cross section, a shortest
distance between the fourth shaft and the second shaft
20 may be shorter than a shortest distance between the
fourth shaft and the first shaft. This allows, when the
opening operation of the hollow guide shaft body unit is
performed, the oscillating operation of the hollow guide
shaft body unit to be largely performed in the latter
37
half of the opening operation. As a result, it is
possible to prevent physical interference of the hollow
guide shaft body unit with the nozzle block when the
opening operation of the hollow guide shaft body unit is
5 performed.
In the pneumatic spinning device of the present
invention, the first shaft, the second shaft, the third
shaft, and the fourth shaft may be arranged such that
when the second supporting section is swung about the
10 first shaft with respect to the first supporting section
such that the hollow guide shaft body unit in contact
with the nozzle block is separated from the nozzle block,
the hollow guide shaft body unit is swung about the
second shaft toward the first shaft and then is swung
15 about the second shaft toward the opposite side to the
first shaft. This makes it possible to prevent physical
interference of the hollow guide shaft body unit with
the nozzle block when the opening operation of the hollow
guide shaft body unit is performed, by effectively using
20 a gap formed between the hollow guide shaft body unit
and the nozzle block when the hollow guide shaft body
unit is in contact with the nozzle block.
The pneumatic spinning device of the present
invention may further include an air supply pipe through
38
which air to be supplied to the hollow guide shaft body
unit passes, and the air supply pipe may have a pipe
joint section attached to the first supporting section
to be swingable about a fifth shaft. This makes it
5 possible to prevent physical interference of the air
supply pipe with each section of the pneumatic spinning
device when the opening operation and the oscillating
operation of the hollow guide shaft body unit are
performed.
10 In the pneumatic spinning device of the present
invention, the pipe joint section may be provided with
a first connection port facing an opposite side to the
first supporting section and a second connection port
facing toward the hollow guide shaft body unit. This
15 enables optimization of arrangement of the air supply
pipe.
In the pneumatic spinning device of the present
invention, the air supply pipe may further have a first
pipe section connected to the first connection port, and
20 a second pipe section connected to the second connection
port and the hollow guide shaft body unit, and each of
the first pipe section and the second pipe section may
be an elastic pipe. Accordingly, the opening operation
and the oscillating operation of the hollow guide shaft
39
body unit can be prevented from being obstructed by the
air supply pipe.
In the pneumatic spinning device of the present
invention, the hollow guide shaft body unit may have a
5 holder provided with the second shaft, and a hollow guide
shaft body detachably held by the holder. Accordingly,
the hollow guide shaft body can be easily attached to
and detached from the holder during maintenance.
The pneumatic spinning device of the present
10 invention may further include a regulating section that
is provided to the first supporting section and the link,
and is configured to regulate a swing range of the hollow
guide shaft body unit about the second shaft. This
allows the hollow guide shaft body unit to be accurately
15 positioned with respect to the nozzle block in each of
a state where the hollow guide shaft body unit is in
contact with the nozzle block and a state where the
hollow guide shaft body unit is separated from the nozzle
block.
20 The pneumatic spinning device of the present
invention may further include a driving section
configured to separate the hollow guide shaft body unit
that is in contact with the nozzle block from the nozzle
block. Accordingly, the opening operation and the
40
oscillating operation of the hollow guide shaft body
unit can be automatically performed.
In the pneumatic spinning device of the present
invention, the driving section may be an air cylinder.
5 Accordingly, the opening operation and the oscillating
operation of the hollow guide shaft body unit can be
reliably performed.
In the pneumatic spinning device of the present
invention, the first shaft, the second shaft, the third
10 shaft, and the fourth shaft may be provided in parallel
with each other. Accordingly, the opening operation and
the oscillating operation of the hollow guide shaft body
unit can be reliably performed with a compact
configuration.
15 A spinning machine according to the present
invention includes: a draft device configured to produce
a fiber bundle; the pneumatic spinning device described
above configured to twist the fiber bundle with a
whirling airflow to produce a yarn; and a winding device
20 configured to wind the yarn to form a package.
According to this spinning machine, the
convenience of the pneumatic spinning device for an
operator is further improved.

WE CLAIM:
1. A pneumatic spinning device (4) comprising:
a nozzle block (10) provided with a spinning
chamber (14), a fiber guide hole (11a) through which a
5 fiber bundle (F) is guided to the spinning chamber (14),
and a nozzle (15) through which air to be injected into
the spinning chamber (14) passes;
a hollow guide shaft body unit (20) provided with
a fiber introduction port (27) arranged in the spinning
10 chamber (14);
a first supporting section (30) configured to
support the nozzle block (10);
a second supporting section (40) attached to the
first supporting section (30) to be swingable about a
15 first shaft (81), the second supporting section (40)
being configured to support the hollow guide shaft body
unit (20) to be swingable about a second shaft (82); and
a link (50) attached to the hollow guide shaft body
unit (20) to be swingable about a third shaft (83), the
20 link (50) being attached to the first supporting section
(30) to be swingable about a fourth shaft (84),
wherein
in a cross section orthogonal to an axial direction
of the first shaft (81),
42
the third shaft (83) and the fourth shaft (84) are
located on an opposite side to the nozzle block (10)
with respect to a first line segment (S1) connecting the
first shaft (81) and the second shaft (82) at a shortest
5 distance,
in the cross section, a first angle (θ1) formed by
the first line segment (S1) and a second line segment
(S2) connecting the second shaft (82) and the third shaft
(83) at a shortest distance is an acute angle,
10 in the cross section, a second angle (θ2) formed
by an extension line of the first line segment (S1) and
an extension line of a third line segment (S3) connecting
the third shaft (83) and the fourth shaft (84) at a
shortest distance is smaller than the first angle (θ1),
15 a length of the second line segment (S2) is shorter
than a length of the first line segment (S1), and
a length of the third line segment (S3) is shorter
than a length of the second line segment (S2).
20 2. The pneumatic spinning device (4) as claimed
in claim 1, wherein
in the cross section, a shortest distance between
the third shaft (83) and the second shaft (82) is shorter
than a shortest distance between the third shaft (83)
43
and the first shaft (81), and
in the cross section, a shortest distance between
the fourth shaft (84) and the second shaft (82) is
shorter than a shortest distance between the fourth shaft
5 (84) and the first shaft (81).
3. The pneumatic spinning device (4) as claimed
in claim 1 or 2, wherein the first shaft (81), the second
shaft (82), the third shaft (83), and the fourth shaft
10 (84) are arranged such that when the second supporting
section (40) is swung about the first shaft (81) with
respect to the first supporting section (30) to allow
the hollow guide shaft body unit (20) in contact with
the nozzle block (10) to be separated from the nozzle
15 block (10), the hollow guide shaft body unit (20) to be
swung about the second shaft (82) toward the first shaft
(81) and then swung about the second shaft (82) toward
an opposite side to the first shaft (81),
20 4. The pneumatic spinning device (4) as claimed
in any one of claims 1 to 3, comprising an air supply
pipe (60) through which air to be supplied to the hollow
guide shaft body unit (20) passes, wherein
the air supply pipe (60) has a pipe joint section
44
(61) attached to the first supporting section (30) to be
swingable about a fifth shaft (85).
5. The pneumatic spinning device (4) as claimed
5 in claim 4, wherein the pipe joint section (61) is
provided with a first connection port (61a) facing an
opposite side to the first supporting section (30), and
a second connection port (61b) facing toward the hollow
guide shaft body unit (20).
10
6. The pneumatic spinning device (4) as claimed
in claim 5, wherein
the air supply pipe (60) has a first pipe section
(62) connected to the first connection port (61a), and
15 a second pipe section (63) connected to the second
connection port (61b) and the hollow guide shaft body
unit (20), and
each of the first pipe section (62) and the second
pipe section (63) is an elastic pipe.
20
7. The pneumatic spinning device (4) as claimed
in any one of claims 1 to 6, wherein the hollow guide
shaft body unit (20) has a holder (25) provided with the
second shaft (82), and a hollow guide shaft body (21)
45
detachably held by the holder (25).
8. The pneumatic spinning device (4) as claimed
in any one of claims 1 to 7, comprising a regulating
5 section (71) provided to the first supporting section
(30) and the link (50), the regulating section (71) being
configured to regulate a swing range of the hollow guide
shaft body unit (20) about the second shaft (82).
10 9. The pneumatic spinning device (4) as claimed
in any one of claims 1 to 8, comprising a driving section
(72) configured to separate the hollow guide shaft body
unit (20) that is in contact with the nozzle block (10),
from the nozzle block (10).
15
10. The pneumatic spinning device (4) as claimed
in claim 9, wherein the driving section (72) is an air
cylinder (72).
20 11. The pneumatic spinning device (4) as claimed
in any one of claims 1 to 10, wherein the first shaft
(81), the second shaft (82), the third shaft (83), and
the fourth shaft (84) are provided in parallel with each
other.
46
12. A spinning machine comprising:
a draft device (3) configured to produce a fiber
bundle (F);
5 the pneumatic spinning device (4) as claimed in
any one of claims 1 to 11, the pneumatic spinning device
(4) being configured to twist the fiber bundle (F) with
a whirling airflow to produce a yarn (Y); and
a winding device (8) configured to wind the yarn
10 (Y) to form a package (P).