NOZZLE BLOCK, PNEUMATIC SPINNING DEVICE, AND SPINNING
MACHINE
BACKGROUND OF THE INVENTION
5 1. Field of the Invention
The present invention relates to a nozzle block, a
pneumatic spinning device, and a spinning machine.
2. Description of the Related Art
10 There has been known a pneumatic spinning device
including a nozzle block adapted to apply twists on an
introduced fiber with whirling airflow, and a hollow guide
shaft body unit including a fiber introducing port to which
the fiber applied with twist is introduced, and a passage
15 that guides the fiber introduced from the fiber introducing
port to the outside (see e.g., JP 2009-001935 A and JP
2003-193339 A).
The pneumatic spinning device is desired both to
ensure stable winding property (degree of twists applied
20 on the fiber) and to enhance the spinning speed (generating
speed of yarn).
However, when attempting to realize both the demands,
the tension applied on the yarn sometimes becomes too high
depending on the type of fiber.
25
BRIEF SUMMARY OF THE INVENTION
It is thus an object of the present invention to
provide a nozzle block, a pneumatic spinning device, and
a spinning machine capable of realizing both the ensuring
30 of stable winding property and the enhancement of the
spinning speed while suppressing the generation of high
3
tension at the yarn.
A nozzle block of the present invention includes: a
first block portion including a first space, to which a
fiber is introduced, and a plurality of first nozzles,
through which air injected to generate whirling airflow 5 low is
passed; a second block portion including a second space,
through which the air from the first space is passed; and
a third block portion including a third space, through which
the air from the second space is passed. The first space,
10 the second space, and the third space are aligned from a
first side toward a second side in a predetermined direction.
The second space is spread at a second inner surface tapered
angle from the first side toward the second side. The third
space is spread at a third inner surface tapered angle
15 greater than the second inner surface tapered angle from
the first side toward the second side. A height of the first
space in the predetermined direction is a value greater than
or equal to 3 mm and smaller than or equal to 8 mm. A height
of the second space in the predetermined direction is a
20 value greater than or equal to 30% and smaller than or equal
to 50% of a sum of the height of the second space in the
predetermined direction and a height of the third space in
the predetermined direction.
A pneumatic spinning device of the present invention
25 includes: a nozzle block, to which a fiber is introduced;
and a hollow guide shaft body unit including a fiber
introducing port, to which the fiber introduced to the
nozzle block is introduced, and a passage adapted to guide
the fiber introduced to the fiber introducing port to
30 outside. The nozzle block includes a first block portion
including a first space, to which the fiber is introduced,
4
and a plurality of first nozzles, through which air injected
to generate whirling airflow is passed, a second block
portion including a second space, through which the air from
the first space is passed, and a third block portion
including a third space, through which the air from 5 the
second space is passed. The first space, the second space,
and the third space are aligned from a first side toward
a second side in a predetermined direction. The second
space is spread at a second inner surface tapered angle from
10 the first side toward the second side. The third space is
spread at a third inner surface tapered angle greater than
the second inner surface tapered angle from the first side
toward the second side. The hollow guide shaft body unit
includes a first shaft body portion disposed across the
15 second space and the third space, and a second shaft body
portion disposed across the third space and a region on the
second side with respect to the third space. The first
shaft body portion and the second shaft body portion are
aligned from the first side toward the second side, the
20 first shaft body portion is spread at a first outer surface
tapered angle from the first side toward the second side,
the second shaft body portion is spread at a second outer
surface tapered angle greater than the first outer surface
tapered angle from the first side toward the second side,
25 and a distance between an end on the first side of the first
shaft body portion and a virtual plane formed by a boundary
between the second space and the third space is a value
greater than or equal to 3 mm and smaller than or equal to
9 mm.
30 A pneumatic spinning device of the present invention
includes: a nozzle block, to which a fiber is introduced;
5
and a hollow guide shaft body unit including a fiber
introducing port, to which the fiber introduced to the
nozzle block is introduced, a passage adapted to guide the
fiber introduced to the fiber introducing port to outside,
and a second nozzle, through which air injected to 5 the
passage is passed. The nozzle block includes a first block
portion including a first space, to which the fiber is
introduced, and a plurality of first nozzles, through which
air injected to generate whirling airflow is passed, a
10 second block portion including a second space, through
which the air from the first space is passed, and a third
block portion including a third space, through which the
air from the second space is passed. The first space, the
second space, and the third space are aligned from a first
15 side toward a second side in a predetermined direction. The
second space is spread at a second inner surface tapered
angle from the first side toward the second side. The third
space is spread at a third inner surface tapered angle
greater than the second inner surface tapered angle from
20 the first side toward the second side. The hollow guide
shaft body unit includes a first shaft body portion disposed
across the second space and the third space, and a second
shaft body portion disposed across the third space and a
region on the second side with respect to the third space.
25 The first shaft body portion and the second shaft body
portion are aligned from the first side toward the second
side. The first shaft body portion is spread at a first
outer surface tapered angle from the first side toward the
second side, and the second shaft body portion is spread
30 at a second outer surface tapered angle greater than the
first outer surface tapered angle from the first side toward
6
the second side.
A spinning machine of the present invention includes:
the pneumatic spinning device; a winding device adapted to
wind a yarn produced by the pneumatic spinning device to
form a package; and a measuring device adapted to m5 easure
a tension of the yarn between the pneumatic spinning device
and the winding device.
BRIEF DESCRIPTION OF THE DRAWINGS
10 FIG. 1 is a front view illustrating a spinning machine
according to one embodiment of the present invention;
FIG. 2 is a side view illustrating a spinning unit
of the spinning machine in FIG. 1;
FIG. 3 is a cross-sectional view illustrating a
15 pneumatic spinning device of the spinning unit in FIG. 2;
and
FIG. 4 is a cross-sectional view illustrating one
part of the pneumatic spinning device in FIG. 3.
20 DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
An embodiment of the present invention will be
hereinafter described in detail with reference to the
accompanying drawings. The same reference numerals are
denoted on the same or corresponding portions throughout
25 the drawings, and redundant description will be omitted.
As illustrated in FIG. 1, a spinning machine 1
includes a plurality of spinning units 2, a yarn joining
cart 3, a doffing cart (not illustrated), a first end frame
4, and a second end frame 5. The plurality of the spinning
30 units 2 are arranged in a row. Each of the spinning units
2 is adapted to produce a yarn Y and to wind the yarn Y around
7
a package P. The yarn joining cart 3 is adapted to perform
a yarn joining operation in a spinning unit 2 after the yarn
Y is cut, or the yarn Y is broken for some reason in such
a spinning unit 2. The doffing cart is adapted to doff the
package P and to supply a new bobbin B to the spinning 5 unit
2 when the package P is fully-wound in a spinning unit 2.
The first end frame 4 accommodates, for example, a
collecting device adapted to collect a fiber waste, a yarn
waste, and the like generated in the spinning units 2. The
10 second end frame 5 accommodates an air supplying section
adapted to adjust air pressure of compressed air (air) to
be supplied to the spinning machine 1 and to supply the air
to each section of the spinning machine 1, a drive motor
adapted to supply power to each section of the spinning unit
15 2, and the like. The second end frame 5 is provided with
a machine control device 41, a display screen (display
section) 42, and input keys 43. The machine control
device 41 is adapted to intensively manage and control each
section of the spinning machine 1. The display screen 42
20 is capable of displaying information relating to set
contents and/or status, or the like of the spinning units
2. An operator can perform a setting operation of the
spinning units 2 by performing an appropriate operation
with the input keys 43.
25 As illustrated in FIGS. 1 and 2, each spinning unit
2 includes a draft device 6, a pneumatic spinning device
7, a yarn monitoring device 8, a tension sensor 9, a yarn
storage device 11, a waxing device 12, and a winding device
13 in this order from upstream in a travelling direction
30 of the yarn Y. A unit controller 10 is provided for every
predetermined number of the spinning units 2 and is adapted
8
to control operations of the spinning units 2.
The draft device 6 is adapted to draft a sliver (fiber
bundle) S. The draft device 6 includes a pair of back
rollers 14, a pair of third rollers 15, a pair of middle
rollers 16, and a pair of front rollers 17 in this 5 order
from upstream in a travelling direction of the sliver S.
Each pair of rollers 14, 15, 16, and 17 includes a bottom
roller and a top roller. The bottom roller is rotationally
driven by the drive motor provided in the second end frame
10 5 or by a drive motor provided in each spinning unit 2. An
apron belt 18a is provided with respect to the bottom roller
of the middle rollers 16. An apron belt 18b is provided
with respect to the top roller of the middle rollers 16.
The pneumatic spinning device 7 is adapted to produce
15 the yarn Y by twisting a fiber bundle (fiber) F, which has
been drafted by the draft device 6, with whirling airflow.
The yarn monitoring device 8 is adapted to monitor
information on the travelling yarn Y between the pneumatic
spinning device 7 and the yarn storage device 11, and to
20 detect presence or absence of a yarn defect based on the
information acquired by the monitoring. When detecting
the yarn defect, the yarn monitoring device 8 transmits a
yarn defect detection signal to the unit controller 10. The
yarn monitoring device 8 detects as the yarn defect, for
25 example, an abnormality in thickness of the yarn Y and/or
a foreign substance in the yarn Y. The yarn monitoring
device 8 also detects a yarn breakage or the like. The
tension sensor (measuring device) 9 is adapted to measure
tension of the travelling yarn Y between the pneumatic
30 spinning device 7 and the winding device 13, preferably
between the pneumatic spinning device 7 and the yarn storage
9
device 11, and to transmit a tension measurement signal to
the unit controller 10. When the unit controller 10
determines a presence of an abnormality based on a detection
result of the yarn monitoring device 8 and/or the tension
sensor 9, the yarn Y is cut in the spinning unit 5 2.
Specifically, by stopping air supply to the pneumatic
spinning device 7 to interrupt the production of the yarn
Y, the yarn Y is cut. Alternatively, the yarn Y may be cut
with a cutter separately provided.
10 The waxing device 12 is adapted to apply wax to the
yarn Y between the yarn storage device 11 and the winding
device 13.
The yarn storage device 11 is adapted to eliminate
a slack of the yarn Y between the pneumatic spinning device
15 7 and the winding device 13. The yarn storage device 11
has a function of stably feeding the yarn Y from the
pneumatic spinning device 7, a function of preventing the
yarn Y from slackening by accumulating the yarn Y fed from
the pneumatic spinning device 7 at the time of the yarn
20 joining operation or the like by the yarn joining cart 3,
and a function of preventing variation in the tension of
the yarn Y downstream of the yarn storage device 11 from
being propagated to the pneumatic spinning device 7.
The winding device 13 is adapted to wind the yarn Y
25 around a bobbin B to form a package P. The winding device
13 includes a cradle arm 21, a winding drum 22 and a traverse
guide 23. The cradle arm 21 is adapted to rotatably support
the bobbin B. The cradle arm 21 is swingably supported by
a support shaft 24 and is adapted to bring a surface of the
30 bobbin B or a surface of the package P into contact with
a surface of the winding drum 22 under appropriate pressure.
10
A drive motor (not illustrated) provided in the second end
frame 5 is adapted to simultaneously drive the winding drums
22 each provided in the plurality of the spinning units 2.
Accordingly, in each spinning unit 2, the bobbin B or the
package P is rotated in a winding direction. The 5 traverse
guide 23 of each spinning unit 2 is provided on a shaft 25
shared by the plurality of the spinning units 2. By the
drive motor in the second end frame 5 driving the shaft 25
to reciprocate in a direction of a rotational axis of the
10 winding drum 22, the traverse guide 23 traverses the yarn
Y in a predetermined width with respect to the rotating
bobbin B or package P.
After the yarn Y is cut, or is broken for some reason
in a spinning unit 2, the yarn joining cart 3 travels to
15 such a spinning unit 2 to perform the yarn joining operation.
The yarn joining cart 3 includes a yarn joining device 26,
a suction pipe 27 and a suction mouth 28. The suction pipe
27 is swingably supported by a support shaft 31, and is
adapted to catch the yarn Y from the pneumatic spinning
20 device 7 and to guide the caught yarn Y to the yarn joining
device 26. The suction mouth 28 is swingably supported by
a support shaft 32, and is adapted to catch the yarn Y from
the winding device 13 and to guide the caught yarn Y to the
yarn joining device 26. The yarn joining device 26 is
25 adapted to join the guided yarns Y together. The yarn
joining device 26 is a splicer using compressed air, a
piecer using a seed yarn, a knotter adapted to join the yarns
Y together in a mechanical manner, or the like.
When the yarn joining cart 3 performs the yarn joining
30 operation, the package P is rotated in an unwinding
direction (reversely rotated). At this time, the cradle
11
arm 21 is moved by an air cylinder (not illustrated) such
that the package P is located away from the winding drum
22, and the package P is reversely rotated by a
reversely-rotating roller (not illustrated) provided in
5 the yarn joining cart 3.
The configuration of the pneumatic spinning device
7 will be described more specifically with reference to FIGS.
3 and 4. In the following description, upstream and
downstream in a travelling direction of the fiber bundle
10 F and the yarn Y are respectively referred to as "upstream"
and "downstream" simply.
As illustrated in FIG. 3, the pneumatic spinning
device 7 includes a fiber guiding section 50, a nozzle block
60, and a hollow guide shaft body unit 70. The fiber guiding
15 section 50, the nozzle block 60, and the hollow guide shaft
body unit 70 are aligned on a line L from a first side (i.e.,
upstream) toward a second side (i.e., downstream) in a
direction (predetermined direction) along the line L.
The fiber guiding section 50 includes a guiding hole
20 51 adapted to guide the fiber bundle F supplied from the
draft device 6. The fiber guiding section 50 is provided
with a needle 52 disposed along the line L such that a distal
end portion 52a is located downstream.
In a space formed between the nozzle block 60 and the
25 hollow guide shaft body unit 70, the pneumatic spinning
device 7 applies twist on the fiber bundle F guided from
the fiber guiding section 50 with the whirling airflow. The
nozzle block 60 includes a first block portion 61, a second
block portion 62, and a third block portion 63. The first
30 block portion 61, the second block portion 62, and the third
block portion 63 are aligned from upstream toward
12
downstream and are, for example, integrally formed. The
fiber guiding section 50 is disposed at an end on a first
side of the first block portion 61.
The first block portion 61 includes a first space 64,
to which the fiber bundle F is introduced, and a 5 plurality
of first nozzles 65 through which air injected to generate
the whirling airflow is passed. The plurality of first
nozzles 65 are, for example, provided at an equiangular
interval around the line L. The number of first nozzles
10 65 is five. The second block portion 62 includes a second
space 66 through which the air from the first space 64 is
passed. The third block portion 63 includes a third space
67 through which the air from the second space 66 is passed.
An opening on the first space 64 side of each first nozzle
15 65 is located at a boundary between the first block portion
61 and the second block portion 62. That is, the first block
portion 61 includes at least a part of each first nozzle
65. The opening on the first space 64 side of each first
nozzle 65 may be located in the first block portion 61 or
20 may be located in the second block portion 62.
As illustrated in FIG. 4, the first space 64, the
second space 66, and the third space 67 are aligned from
the upstream toward the downstream, and are formed
continuously. The first space 64 is a circular truncated
25 cone shaped space that spreads from the upstream toward the
downstream at a first inner surface tapered angle and that
has the line L as a center line. The second space 66 is
a circular truncated cone shaped space that spreads from
the upstream toward the downstream at a second inner surface
30 tapered angle and that has the line L as a center line. The
third space 67 is a circular truncated cone shaped space
13
that spreads from the upstream toward the downstream at a
third inner surface tapered angle and that has the line L
as a center line.
Focusing on a virtual plane including the line L, the
first inner surface tapered angle is an angle formed by 5 two
intersecting lines of an inner surface 64a defining the
first space 64 and the virtual plane. Focusing on a virtual
plane including the line L, the second inner surface tapered
angle is an angle formed by two intersecting lines of an
10 inner surface 66a defining the second space 66 and the
virtual plane. Focusing on a virtual plane including the
line L, the third inner surface tapered angle is an angle
formed by two intersecting lines of an inner surface 67a
defining the third space 67 and the virtual plane. The
15 third inner surface tapered angle is greater than the second
inner surface tapered angle, and the second inner surface
tapered angle is greater than the first inner surface
tapered angle. The angles mentioned above are angles
smaller than 180 degrees. When the intersecting lines are
20 curved lines, the lines are approximated to a straight line.
A height H1 of the first space 64 in the direction
along the line L is a value greater than or equal to 3 mm
and smaller than or equal to 8 mm. A height H2 of the second
space 66 in the direction along the line L is a value greater
25 than or equal to 30% and smaller than or equal to 50% of
a sum of the height H2 of the second space 66 in the direction
along the line L and a height H3 of the third space 67 in
a direction along the line L. For example, the sum of the
height H2 and the height H3 is a value greater than or equal
30 to 8 mm and smaller than or equal to 18 mm. The height H1
of the first space 64 is a distance (hereinafter when simply
14
referred to as “distance”, this means “distance in the
direction along the line L”) between a virtual plane
including a contacting surface with the fiber guiding
section 50 in the nozzle block 60, and a virtual plane formed
by a downstream end of the first space 64 (boundary be5 tween
the first space 64 and the second space 66, the boundary
formed on the inner surface of the nozzle block 60). The
height H2 of the second space 66 is a distance between a
virtual plane formed by an upstream end of the second space
10 66 (boundary between the first space 64 and the second space
66, the boundary formed on the inner surface of the nozzle
block 60), and a virtual plane formed by a downstream end
of the second space 66 (boundary 60a between the second
space 66 and the third space 67, the boundary 60a formed
15 on the inner surface on the nozzle block 60). The height
H3 of the third space 67 is a distance between a virtual
plane formed by an upstream end of the third space 67
(boundary 60a between the second space 66 and the third
space 67, the boundary 60a formed on the inner surface of
20 the nozzle block 60), and a virtual plane including an end
face on the downstream of the nozzle block 60.
A distance between an end face 53 exposed to the first
space 64 in the fiber guiding section 50 and the upstream
end of a first shaft body portion 81 is a value greater than
25 or equal to 2 mm and smaller than or equal to 8 mm. A distance
between the upstream end of the first shaft body portion
81 and a virtual plane formed by the boundary 60a between
the second space 66 and the third space 67 is a value greater
than or equal to 3 mm and smaller than or equal to 9 mm.
30 As illustrated in FIG. 3, the hollow guide shaft body
unit 70 includes a hollow guide shaft body 80, a guiding
15
pipe 71, a supporting member 72, and a fixing member 73.
The hollow guide shaft body 80 includes a first shaft
body portion 81, a second shaft body portion 82, and a third
shaft body portion 83. The first shaft body portion 81,
the second shaft body portion 82, and the third shaft 5 ft body
portion 83 are aligned from upstream toward downstream and
are, for example, integrally formed by ceramic. A flange
83a is provided at the downstream end of the third shaft
body portion 83.
10 The first shaft body portion 81 is provided with a
fiber introducing path 85 opened toward the inner side of
the hollow second shaft body portion 82 and the third shaft
body portion 83. The opening on the upstream of the fiber
introducing path 85 is a fiber introducing port 86 to which
15 the fiber bundle F introduced to the nozzle block 60 is
introduced.
The guiding pipe 71 is provided with a passage 74
adapted to guide the fiber bundle F introduced to the fiber
introducing port 86 to the outside. The passage 74 is
20 opened toward the upstream and the downstream on the line
L. The downstream inner diameter of the passage 74 is
greater than the upstream inner diameter of the passage 74.
A plurality of second nozzles 75, through which the air
injected into the passage 74 is passed, is provided at the
25 upstream end of the guiding pipe 71. The plurality of
second nozzles 75 are, for example, disposed at an
equiangular interval around the line L.
The supporting member 72 is provided with an
accommodation hole 76 opened toward the upstream and a yarn
30 deriving path 77 opened toward the upstream and the
downstream. The upstream end of the yarn deriving path 77
16
is connected to the downstream end of the accommodation hole
76. The inner diameter of the yarn deriving path 77 is
substantially equal to the inner diameter of the portion
on the downstream of the passage 74 of the guiding pipe 71,
and is smaller than the inner diameter of the 5 accommodation
hole 76. An air supplying tube 78 communicating with the
accommodation hole 76 is attached to the supporting member
72. A male screw 72a is formed at the upstream end of the
supporting member 72.
10 The fixing member 73 is a cap-shaped nut including
a flange 73a. In the hollow guide shaft body unit 70, the
guiding pipe 71 is disposed in the accommodation hole 76
of the supporting member 72, and the hollow guide shaft body
80 is disposed at the upstream end of the supporting member
15 72 so as to cover the upstream end of the guiding pipe 71.
Thus, the fiber introducing path 85 of the hollow guide
shaft body 80 and the passage 74 of the guiding pipe 71 are
connected, and the passage 74 of the guiding pipe 71 and
the yarn deriving path 77 of the supporting member 72 are
20 connected. Under such a state, the fixing member 73 is
screw fitted to the male screw 72a of the supporting member
72 while engaging the flange 83a of the hollow guide shaft
body 80.
As illustrated in FIG. 4, the first shaft body portion
25 81 is a circular truncated cone shaped portion that spreads
from the upstream toward the downstream at a first outer
surface tapered angle and that has the line L as a center
line. The second shaft body portion 82 is a circular
truncated cone shape portion that spreads from the upstream
30 toward the downstream at a second outer surface tapered
angle and that has the line L as a center line. The first
17
shaft body portion 81 is a portion downstream of the
upstream end of the hollow guide shaft body 80. This
upstream end is a portion where the upstream opening of the
fiber introducing port 86 is provided, and is a rounded
5 portion.
Focusing on a virtual plane including the line L, the
first outer surface tapered angle is an angle formed by two
intersecting lines of an outer surface 81a of the first
shaft body portion 81 and the virtual plane. Focusing on
10 a virtual plane including the line L, the second outer
surface tapered angle is an angle formed by two intersecting
lines of an outer surface 82a of the second shaft body
portion 82 and the virtual plane. The second outer surface
tapered angle is greater than the first outer surface
15 tapered angle. The angles mentioned above are angles
smaller than 180 degrees. When the intersecting lines are
curved lines, the lines are approximated to a straight line.
The first shaft body portion 81 is disposed across
the second space 66 and the third space 67 with respect to
20 the nozzle block 60. The second shaft body portion 82 is
disposed across the third space 67 and a region (exterior
to the third space 67) downstream of the third space 67 with
respect to the nozzle block 60. That is, the boundary 60a
at which the inner surface angle is switched, the boundary
25 60a provided between the second space 66 and the third space
67, is located upstream of the boundary 80a at which the
outer surface tapered angle is switched, the boundary 80a
provided between the first shaft body portion 81 and the
second shaft body portion 82.
30 Thus, the first space 64 functions as an inverting
region R1 of inverting the fiber guided by the fiber guiding
18
section 50. A region surrounded by the inner surface 66a
and the outer surface 81a of the first shaft body portion
81 in the second space 66 functions as a whirling region
R2 of whirling the inverted fiber. A region surrounded by
the inner surface 67a and the outer surface 81a of the 5 first
shaft body portion 81 and the outer surface 82a of the second
shaft body portion 82 in the third space 67 functions as
an exhausting region R3 discharging the air injected from
the plurality of first nozzles 65 and passed through the
10 inverting region R1 and the whirling region R2. In the
pneumatic spinning device 7, the flange 73a of the fixing
member 73 is brought into contact with a holder (not
illustrated) supporting the nozzle block 60 during the
spinning operation to maintain the position relationship
15 described above.
The spinning operation of the pneumatic spinning
device 7 configured as above will now be described. At the
start of the spinning operation, the air is injected from
the plurality of first nozzles 65 into the nozzle block 60,
20 and the air is injected from the plurality of second nozzles
75 to the passage 74. Thus, the fiber bundle F introduced
from the draft device 6 to the first space 64 through the
guiding hole 51 is derived downstream through the passage
74 and the yarn deriving path 77. The air injected from
25 each second nozzle 75 is supplied through the air supplying
tube 78, a region on the outer side of the guiding pipe 71
in the accommodation hole 76 of the supporting member 72,
and a region on the outer side of the guiding pipe 71 on
the inner side of the second shaft body portion 82 and the
30 third shaft body portion 83 of the hollow guide shaft body
80.
19
Thereafter, the injection of air from the plurality
of first nozzles 65 to the first space 64 is continued, and
the injection of air from the plurality of second nozzles
75 to the passage 74 is stopped. The fibers configuring
the fiber bundle F are thereby inverted and whirled at 5 the
periphery of the fiber introducing port 86 so that actual
twist is applied on the fiber bundle F by the whirling
airflow generated from the inverting region R1 across the
whirling region R2. At this time, the twists of the fiber
10 bundle F are prevented from being propagated toward the
upstream of the pneumatic spinning device 7 by the needle
52. The yarn Y produced by applying actual twists on the
fiber bundle F is passed through the passage 74 and the yarn
deriving path 77, and derived toward the downstream. The
15 air injected from the plurality of first nozzles 65 is
passed through the inverting region R1 and the whirling
region R2 and discharged from the exhausting region R3 along
with the fiber not configuring the yarn Y. During the
spinning operation, the tension of the yarn Y is measured
20 by the tension sensor 9, and the value of the measured
tension is displayed on the display screen 42. Therefore,
the operator can check if the yarn Y is being produced at
the intended tension by checking the value displayed on the
display screen 42.
25 As described above, in the nozzle block 60, the height
H1 of the first space 64 in the direction along the line
L is a value greater than or equal to 3 mm and smaller than
or equal to 8 mm. Thus, both the ensuring of stable winding
property and the enhancement of the spinning speed can be
30 realized. In the nozzle block 60, the height H2 of the
second space 66 in the direction along the line L is a value
20
greater than or equal to 30% and smaller than or equal to
50% of the sum of the height H2 of the second space 66 in
the direction along the line L and the height H3 of the third
space 67 in a direction along the line L. Thus, the
generation of high tension can be suppressed at the 5 yarn
Y. Thus, with the nozzle block 60, both the ensuring of
stable winding property and the enhancement of the spinning
speed can be realized while suppressing the generation of
high tension at the yarn Y. High tension is, for example,
10 a tension higher by a predetermined value than the tension
of when the yarn Y having the intended quality is produced.
In the pneumatic spinning device 7, the first shaft
body portion 81 is disposed across the second space 66 and
the third space 67 with respect to the nozzle block 60, and
15 the second shaft body portion 82 is disposed across the
third space 67 and the region downstream of the third space
67 with respect to the nozzle block 60. That is, in the
pneumatic spinning device 7, the boundary 60a at which the
inner surface tapered angle is switched, the boundary 60a
20 provided between the second space 66 and the third space
67, is located upstream of the boundary 80a at which the
outer surface tapered angle is switched, the boundary 80a
provided between the first shaft body portion 81 and the
second shaft body portion 82. Thus, both the ensuring of
25 stable winding property and the enhancement of the spinning
speed can be realized while suppressing the generation of
high tension at the yarn Y. In particular, at the start
of the spinning operation, when the air is injected from
the plurality of first nozzles 65 into the nozzle block 60
30 and the air is injected from the plurality of second nozzles
75 into the passage 74, the generation of high tension is
21
suppressed at the fiber bundle F even while applying
sufficient temporary twist on the fiber bundle F, so that
the fiber bundle F can be reliably drawn into the pneumatic
spinning device 7.
In the nozzle block 60, the third inner 5 surface
tapered angle of the third space 67 is greater than the
second inner surface tapered angle of the second space 66,
and the second inner surface tapered angle of the second
space 66 is greater than the first inner surface tapered
10 angle of the first space 64. Thus, both the ensuring of
stable winding property and the enhancement of the spinning
speed can be more reliably realized.
In the nozzle block 60, the number of first nozzles
65 is five. Thus, both the ensuring of stable winding
15 property and the enhancement of the spinning speed can be
more reliably realized.
The fiber guiding section 50 adapted to guide the
fiber bundle F to the first space 64 is provided in the
pneumatic spinning device 7. Thus, the fiber bundle F can
20 be reliably guided to the first space 64.
In the pneumatic spinning device 7, the distance
between the end face 53 exposed to the first space 64 in
the fiber guiding section 50 and the upstream end of the
first shaft body portion 81 is a value greater than or equal
25 to 2 mm and smaller than or equal to 8 mm. Thus, both the
ensuring of stable winding property and the enhancement of
the spinning speed can be realized.
In the pneumatic spinning device 7, the distance
between the upstream end of the first shaft body portion
30 81 and the virtual plane formed by the boundary 60a between
the second space 66 and the third space 67 is a value greater
22
than or equal to 3 mm and smaller than or equal to 9 mm.
Thus, the generation of high tension can be suppressed at
the yarn Y.
In the spinning machine 1, the tension sensor 9
adapted to measure the tension of the yarn Y between 5 n the
pneumatic spinning device 7 and the winding device 13 is
provided. With this configuration, it is possible to check
whether or not the tension of the yarn Y is appropriate.
In the spinning machine 1, the display screen 42
10 adapted to display the value of the tension measured by the
tension sensor 9 is provided. The value of the tension of
the yarn Y is thereby notified to the operator.
An embodiment of the present invention has been
described above, but the present invention is not limited
15 to the above-described embodiment.
The height H1 of the first space 64 in the direction
along the line L may be set to take a value greater than
or equal to 8% and smaller than or equal to 15% of the average
fiber length of the fibers configuring the fiber bundle F.
20 The first space 64 may not be a circular truncated cone shape,
and may be a circular cylinder shape. In FIG. 4, the end
face 53 exposed to the first space 64 in the fiber guiding
section 50 is in plane with the contacting surface with
respect to the first block portion 61 in the fiber guiding
25 section 50, but the end face 53 may be located upstream of
the contacting surface or maybe located downstream of the
contacting surface. The number of first nozzles 65 may be
3, 4, 6, or the like. The value of the tension measured
by the tension sensor 9 may be displayed on the display
30 screen provided for each spinning unit 2. The display
screen may also display information other than the value
23
of the measured tension.
The hollow guide shaft body unit 70 may not include
the second nozzle 75. In the hollow guide shaft body unit
70, the first shaft body portion 81, and the second shaft
body portion 82 and the third shaft body portion 83 5 are
formed as separate bodies, and the first shaft body portion
81 formed as a separate body from the second shaft body
portion 82 and the third shaft body portion 83 may
integrally include the upstream end of the guiding pipe 71
10 where the second nozzle 75 is provided (see FIG. 3). In
such a case, the second shaft body portion 82 and the third
shaft body portion 83 which are formed as separate bodies
from the first shaft body portion 81 may be integrally
formed with the fixing member 73.
15 In FIG. 4, the inner surface 64a, the inner surface
66a, and the inner surface 67a are illustrated as straight
lines. However, at least one of the inner surface 64a, the
inner surface 66a, and the inner surface 67a may be a curve.
In FIG. 4, the boundary 60a is illustrated to have a pointed
20 corner formed by two straight lines, but such a portion may
be formed by a curve. Such a curve is formed in the
direction of projecting into the nozzle block 60. The inner
surface 66a and the inner surface 67a may not be directly
connected, and a curve-shaped connecting portion, for
25 example, may be provided between the inner surface 66a
illustrated as a straight line and the inner surface 67a
illustrated as a straight line. This is the same for the
inner surface 64a and the inner surface 66a.
In FIG. 4, the outer surface 81a and the outer surface
30 82a are illustrated as straight lines. However, at least
one of the outer surface 81a or the outer surface 82a may
24
be a curve. In FIG. 4, the boundary 80a is illustrated to
have a pointed corner formed by two straight lines, but such
a portion may be formed by a curve. Such a curve is formed
in the direction of projecting into the hollow guide shaft
body 80. The outer surface 81a and the outer surface 5 ce 82a
may not be directly connected, and a curve-shaped
connecting portion, for example, may be provided between
the outer surface 81a illustrated as a straight line and
the outer surface 82a illustrated as a straight line.
10 The pneumatic spinning device 7 may not include the
needle 52, and may prevent the twists of the fiber bundle
F from being propagated to upstream of the pneumatic
spinning device 7 by the downstream end of the fiber guiding
section 50.
15 In the spinning unit 2, the yarn storage device 11
has a function of feeding the yarn Y from the pneumatic
spinning device 7, but the yarn Y may be fed from the
pneumatic spinning device 7 with a delivery roller and a
nip roller. In a case of feeding the yarn Y from the
20 pneumatic spinning device 7 with the delivery roller and
the nip roller, a slack tube adapted to absorb the slack
of the yarn Y with suction airflow, a mechanic compensator,
or the like may be provided instead of the yarn storage
device 11.
25 In the spinning machine 1, each device is disposed
such that the yarn Y supplied at an upper side is wound at
a lower side in a direction of a machine height. However,
each device may be disposed such that the yarn Y supplied
at the lower side is wound at the upper side.
30 In the spinning machine 1, at least one of the bottom
rollers in the draft device 6, and the traverse guide 23
25
are driven by power from the second end frame 5 (that is,
in common with the plurality of spinning units 2). However,
each section (for example, the draft device 6, the pneumatic
spinning device 7, the winding device 13, or the like) of
the spinning unit 2 may be driven independently 5 for each
spinning unit 2.
In the travelling direction of the yarn Y, the tension
sensor 9 may be disposed upstream of the yarn monitoring
device 8. The unit controller 10 may be provided for every
10 spinning unit 2. In the spinning unit 2, the waxing device
12, the tension sensor 9, and the yarn monitoring device
8 may be omitted.
FIG. 1 illustrates that the spinning machine 1 winds
a cheese package P, but the spinning machine 1 can also wind
15 a conical package P. In a case of the conical package P,
a slack of the yarn Y occurs by traversing the yarn Y, but
the slack can be absorbed with the yarn storage device 11.
A material and a shape of each component are not limited
to the above-mentioned material and shape, and various
20 materials and shapes can be adopted.
A nozzle block of the present invention includes: a
first block portion including a first space, to which a
fiber is introduced, and a plurality of first nozzles,
through which air injected to generate whirling airflow is
25 passed; a second block portion including a second space,
through which the air from the first space is passed; and
a third block portion including a third space, through which
the air from the second space is passed. The first space,
the second space, and the third space are aligned from a
30 first side toward a second side in a predetermined direction.
The second space is spread at a second inner surface tapered
26
angle from the first side toward the second side. The third
space is spread at a third inner surface tapered angle
greater than the second inner surface tapered angle from
the first side toward the second side. A height of the first
space in the predetermined direction is a value greater 5 r than
or equal to 3 mm and smaller than or equal to 8 mm. A height
of the second space in the predetermined direction is a
value greater than or equal to 30% and smaller than or equal
to 50% of a sum of the height of the second space in the
10 predetermined direction and a height of the third space in
the predetermined direction.
As the height of the first space in the predetermined
direction is greater than or equal to 3 mm and smaller than
or equal to 8 mm, both the ensuring of stable winding
15 property and the enhancement of spinning speed can be
realized. As the height of the second space in the
predetermined direction is a value greater than or equal
to 30% and smaller than or equal to 50% of a sum of the height
of the second space in the predetermined direction and the
20 height of the third space in the predetermined direction,
generation of high tension can be suppressed at the yarn.
In the nozzle block of the present invention, the
first space may be spread at a first inner surface tapered
angle smaller than the second inner surface tapered angle
25 from the first side toward the second side. Thus, both the
ensuring of stable winding property and the enhancement of
the spinning speed can be more reliably realized.
In the nozzle block of the present invention, the
number of plurality of first nozzles may be five. Thus,
30 both the ensuring of stable winding property and the
enhancement of the spinning speed can be more reliably
27
realized.
A pneumatic spinning device of the present invention
includes: a nozzle block, to which a fiber is introduced;
and a hollow guide shaft body unit including a fiber
introducing port, to which the fiber introduced to 5 the
nozzle block is introduced, and a passage adapted to guide
the fiber introduced to the fiber introducing port to
outside. The nozzle block includes a first block portion
including a first space, to which the fiber is introduced,
10 and a plurality of first nozzles, through which air injected
to generate whirling airflow is passed, a second block
portion including a second space, through which the air from
the first space is passed, and a third block portion
including a third space, through which the air from the
15 second space is passed. The first space, the second space,
and the third space are aligned from a first side toward
a second side in a predetermined direction. The second
space is spread at a second inner surface tapered angle from
the first side toward the second side. The third space is
20 spread at a third inner surface tapered angle greater than
the second inner surface tapered angle from the first side
toward the second side. The hollow guide shaft body unit
includes a first shaft body portion disposed across the
second space and the third space, and a second shaft body
25 portion disposed across the third space and a region on the
second side with respect to the third space. The first
shaft body portion and the second shaft body portion are
aligned from the first side toward the second side, the
first shaft body portion is spread at a first outer surface
30 tapered angle from the first side toward the second side,
the second shaft body portion is spread at a second outer
28
surface tapered angle greater than the first outer surface
tapered angle from the first side toward the second side,
and a distance between an end on the first side of the first
shaft body portion and a virtual plane formed by a boundary
between the second space and the third space is a v5 alue
greater than or equal to 3 mm and smaller than or equal to
9 mm.
According to the pneumatic spinning device, both the
ensuring of stable winding property and the enhancement of
10 the spinning speed can be realized while suppressing the
generation of high tension at the yarn.
A pneumatic spinning device of the present invention
includes: a nozzle block, to which a fiber is introduced;
and a hollow guide shaft body unit including a fiber
15 introducing port, to which the fiber introduced to the
nozzle block is introduced, a passage adapted to guide the
fiber introduced to the fiber introducing port to outside,
and a second nozzle, through which air injected to the
passage is passed. The nozzle block includes a first block
20 portion including a first space, to which the fiber is
introduced, and a plurality of first nozzles, through which
air injected to generate whirling airflow is passed, a
second block portion including a second space, through
which the air from the first space is passed, and a third
25 block portion including a third space, through which the
air from the second space is passed. The first space, the
second space, and the third space are aligned from a first
side toward a second side in a predetermined direction. The
second space is spread at a second inner surface tapered
30 angle from the first side toward the second side. The third
space is spread at a third inner surface tapered angle
29
greater than the second inner surface tapered angle from
the first side toward the second side. The hollow guide
shaft body unit includes a first shaft body portion disposed
across the second space and the third space, and a second
shaft body portion disposed across the third space and 5 a
region on the second side with respect to the third space.
The first shaft body portion and the second shaft body
portion are aligned from the first side toward the second
side. The first shaft body portion is spread at a first
10 outer surface tapered angle from the first side toward the
second side, and the second shaft body portion is spread
at a second outer surface tapered angle greater than the
first outer surface tapered angle from the first side toward
the second side.
15 According to the pneumatic spinning device, both the
ensuring of stable winding property and the enhancement of
the spinning speed can be realized while suppressing the
generation of high tension at the yarn. In particular, at
the start of the spinning operation, when the air is
20 injected from the plurality of first nozzles into the nozzle
block and the air is injected from the second nozzle into
the passage, the generation of high tension can be
suppressed at the fiber bundle even while applying
sufficient temporary twist on the fiber bundle so that the
25 fiber bundle can be reliably drawn into the pneumatic
spinning device.
In the pneumatic spinning device of the present
invention, the distance between the end on the first side
of the first shaft body portion and the virtual plane formed
30 by the boundary between the second space and the third space
may be a value greater than or equal to 3 mm and smaller
30
than or equal to 9 mm. Thus, the generation of high tension
can be suppressed at the yarn.
The pneumatic spinning device of the present
invention may further include a fiber guiding section
adapted to guide the fiber to the first space. Thus, 5 the
fiber can be reliably guided to the first space.
In the pneumatic spinning device of the present
invention, the distance between the end face exposed to the
first space in the fiber guiding section and the end on the
10 first side of the first shaft body portion is a value greater
than or equal to 2 mm and smaller than or equal to 8 mm.
Thus, both the ensuring of stable winding property and the
enhancement of the spinning speed can be realized.
A spinning machine of the present invention includes:
15 the pneumatic spinning device; a winding device adapted to
wind a yarn produced by the pneumatic spinning device to
form a package; and a measuring device adapted to measure
a tension of the yarn between the pneumatic spinning device
and the winding device.
20 According to the pneumatic spinning device, both the
ensuring of stable winding property and the enhancement of
the spinning speed can be realized while suppressing the
generation of high tension at the yarn. Since the tension
of the yarn is measured, for example, whether or not the
25 tension of the yarn Y is appropriate can be checked.
The spinning machine of the present invention may
further include a display section adapted to display a value
of the tension measured by the measuring device. The value
of the tension of the yarn thus can be notified to the
30 operator.
According to the present invention, a nozzle block,
31
a pneumatic spinning device, and a spinning machine capable
of realizing both the ensuring of stable winding property
and the enhancement of the spinning speed while suppressing
the generation of high tension at the yarn can be provided.
5
32
We claim:
1. A nozzle block (60) comprising:
a first block portion (61) including a first space
(64), to which a fiber (F) is introduced, and a 5 plurality
of first nozzles (65), through which air injected to
generate whirling airflow is passed;
a second block portion (62) including a second space
(66), through which the air from the first space (64) is
10 passed; and
a third block portion (63) including a third space
(67), through which the air from the second space (66) is
passed,
wherein
15 the first space (64), the second space (66), and the
third space (67) are aligned from a first side toward a
second side in a predetermined direction,
the second space (66) is spread at a second inner
surface tapered angle from the first side toward the second
20 side,
the third space (67) is spread at a third inner surface
tapered angle greater than the second inner surface tapered
angle from the first side toward the second side,
a height (H1) of the first space (64) in the
25 predetermined direction is a value greater than or equal
to 3 mm and smaller than or equal to 8 mm, and
a height (H2) of the second space (66) in the
predetermined direction is a value greater than or equal
to 30% and smaller than or equal to 50% of a sum of the height
30 (H2) of the second space (66) in the predetermined direction
and a height (H3) of the third space (67) in the
33
predetermined direction.
2. The nozzle block (60) according to claim 1,
wherein the first space (64) is spread at a first inner
surface tapered angle smaller than the second inner 5 surface
tapered angle from the first side toward the second side.
3. The nozzle block (60) according to claim 1 or 2,
wherein a number of the first nozzles (65) is five.
10
4. A pneumatic spinning device (7) comprising:
a nozzle block (60), to which a fiber (F) is
introduced; and
a hollow guide shaft body unit (70) including a fiber
15 introducing port (86), to which the fiber (F) introduced
to the nozzle block (60) is introduced, and a passage (74)
adapted to guide the fiber (F) introduced to the fiber
introducing port (86) to outside,
wherein
20 the nozzle block (60) includes
a first block portion (61) including a first
space (64), to which the fiber (F) is introduced, and a
plurality of first nozzles (65), through which air injected
to generate whirling airflow is passed,
25 a second block portion (62) including a second
space (66), through which the air from the first space (64)
is passed, and
a third block portion (63) including a third
space (67), through which the air from the second space (66)
30 is passed
the first space (64), the second space (66), and the
34
third space (67) are aligned from a first side toward a
second side in a predetermined direction,
the second space (66) is spread at a second inner
surface tapered angle from the first side toward the second
side5 ,
the third space (67) is spread at a third inner surface
tapered angle greater than the second inner surface tapered
angle from the first side toward the second side,
the hollow guide shaft body unit (70) includes
10 a first shaft body portion (81) disposed across
the second space (66) and the third space (67), and
a second shaft body portion (82) disposed
across the third space (67) and a region on the second side
with respect to the third space (67),
15 the first shaft body portion (81) and the second shaft
body portion (82) are aligned from the first side toward
the second side,
the first shaft body portion (81) is spread at a first
outer surface tapered angle from the first side toward the
20 second side,
the second shaft body portion (82) is spread at a
second outer surface tapered angle greater than the first
outer surface tapered angle from the first side toward the
second side, and
25 a distance between an end on the first side of the
first shaft body portion (81) and a virtual plane formed
by a boundary (60a) between the second space (66) and the
third space (67) is a value greater than or equal to 3 mm
and smaller than or equal to 9 mm.
30
5. A pneumatic spinning device (7) comprising:
35
a nozzle block (60), to which a fiber (F) is
introduced; and
a hollow guide shaft body unit (70) including a fiber
introducing port (86), to which the fiber (F) introduced
to the nozzle block (60) is introduced, a passage 5 e (74)
adapted to guide the fiber (F) introduced to the fiber
introducing port (86) to outside, and a second nozzle (75),
through which air injected to the passage (74) is passed,
wherein
10 the nozzle block (60) includes
a first block portion (61) including a first
space (64), to which the fiber (F) is introduced, and a
plurality of first nozzles (65), through which air injected
to generate whirling airflow is passed,
15 a second block portion (62) including a second
space (66), through which the air from the first space (64)
is passed, and
a third block portion (63) including a third
space (67), through which the air from the second space (66)
20 is passed,
the first space (64), the second space (66), and the
third space (67) are aligned from a first side toward a
second side in a predetermined direction,
the second space (66) is spread at a second inner
25 surface tapered angle from the first side toward the second
side,
the third space (67) is spread at a third inner surface
tapered angle greater than the second inner surface tapered
angle from the first side toward the second side,
30 the hollow guide shaft body unit (70) includes
a first shaft body portion (81) disposed across
36
the second space (66) and the third space (67), and
a second shaft body portion (82) disposed
across the third space (67) and a region on the second side
with respect to the third space (67),
the first shaft body portion (81) and the second shaf5 t
body portion (82) are aligned from the first side toward
the second side,
the first shaft body portion (81) is spread at a first
outer surface tapered angle from the first side toward the
10 second side, and
the second shaft body portion (82) is spread at a
second outer surface tapered angle greater than the first
outer surface tapered angle from the first side toward the
second side.
15
6. The pneumatic spinning device (7) according to
claim 5, wherein a distance between an end on the first side
of the first shaft body portion (81) and a virtual plane
formed by a boundary (60a) between the second space (66)
20 and the third space (67) is a value greater than or equal
to 3 mm and smaller than or equal to 9 mm.
7. The pneumatic spinning device (7) according to
any one of claims 4 to 6, further comprising a fiber guiding
25 section (50) adapted to guide the fiber (F) to the first
space (64).
8. The pneumatic spinning device (7) according to
claim 7, wherein a distance between an end face (53) exposed
30 to the first space (64) in the fiber guiding section (50)
and the end on the first side of the first shaft body portion
37
(81) is a value greater than or equal to 2 mm and smaller
than or equal to 8 mm.
9. A spinning machine (1) comprising:
the pneumatic spinning device (7) according to 5 any
one of claims 4 to 8;
a winding device (13) adapted to wind a yarn (Y)
produced by the pneumatic spinning device (7) to form a
package (P); and
10 a measuring device (9) adapted to measure a tension
of the yarn (Y) between the pneumatic spinning device (7)
and the winding device (13).
10. The spinning machine (1) according to claim 9,
15 further comprising a display section (42) adapted to
display a value of the tension measured by the measuring
device (9).