U.S. patent application number 13/702145 was filed with the patent office on 2013-06-06 for storage package for string-like material and method for storing string-like material.
This patent application is currently assigned to Mitsubishi Rayon Co., Ltd.. The applicant listed for this patent is Hiroyuki Fujiki, Yasuo Hiromoto, Masaki Kurashina, Toshinori Sumi. Invention is credited to Hiroyuki Fujiki, Yasuo Hiromoto, Masaki Kurashina, Toshinori Sumi.
Application Number | 20130140388 13/702145 |
Document ID | / |
Family ID | 45098102 |
Filed Date | 2013-06-06 |
United States Patent
Application |
20130140388 |
Kind Code |
A1 |
Kurashina; Masaki ; et
al. |
June 6, 2013 |
STORAGE PACKAGE FOR STRING-LIKE MATERIAL AND METHOD FOR STORING
STRING-LIKE MATERIAL
Abstract
A tubular storage package which stores a string-like material
includes a tubular core rod which is mounted in a center of a
bottom of the storage container, the string-like material is a
plurality of continuous loop shapes, a storage starting end of the
string-like material protrudes, and a winding center of each loop
of the plurality of loops is deviated around an axis of the storage
container and the loop is laminated.
Inventors: |
Kurashina; Masaki;
(Otake-shi, JP) ; Hiromoto; Yasuo; (Otake-shi,
JP) ; Sumi; Toshinori; (Otake-shi, JP) ;
Fujiki; Hiroyuki; (Otake-shi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Kurashina; Masaki
Hiromoto; Yasuo
Sumi; Toshinori
Fujiki; Hiroyuki |
Otake-shi
Otake-shi
Otake-shi
Otake-shi |
|
JP
JP
JP
JP |
|
|
Assignee: |
Mitsubishi Rayon Co., Ltd.
Tokyo
JP
|
Family ID: |
45098102 |
Appl. No.: |
13/702145 |
Filed: |
June 7, 2011 |
PCT Filed: |
June 7, 2011 |
PCT NO: |
PCT/JP2011/063074 |
371 Date: |
February 19, 2013 |
Current U.S.
Class: |
242/170 ;
242/476.7 |
Current CPC
Class: |
B65H 54/76 20130101;
B65H 2701/31 20130101; B65H 54/80 20130101 |
Class at
Publication: |
242/170 ;
242/476.7 |
International
Class: |
B65H 54/80 20060101
B65H054/80; B65H 54/76 20060101 B65H054/76 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 7, 2010 |
JP |
2010130365 |
Claims
1. A storage package, comprising: a storage container which stores
a string-like material; and a tubular core rod mounted in a center
of a bottom of the storage container, wherein the string-like
material is a plurality of continuous loop shapes, and each loop of
the plurality of loop shapes is laminated so that a winding center
is deviated around an axis of the storage container.
2. The storage package according to claim 1, wherein the plurality
of continuous loops have substantially the same shapes.
3. The storage package according to claim 1, wherein the
string-like material forming the plurality of loops is disposed so
as to enclose the core rod which is mounted on the storage
container.
4. The storage package according to claim 1, wherein at least a
portion of each loop of the plurality of loop shapes is disposed so
as to pass the vicinity of an outer wall of the core rod of the
storage container and the vicinity of an inner wall surface of the
storage container.
5. The storage package according to claim 1, wherein: the vicinity
of an outer wall of the core rod of the storage container is a
region in which a distance from the outer wall of the core rod is
within 30% of a difference between a radius of the storage
container and a radius of the core rod; and the vicinity of an the
inner wall surface of the storage container is a region within 30%
of the difference between the radius of the storage container and
the radius of the core rod.
6. The storage package according to claim 1, wherein a minimum
bending radius R of each loop of the plurality of loop shapes is
equal to or more than a radius of the core rod.
7. The storage package according to claim 1, wherein when a
distance between two adjacent points in which the loop shapes of
the string-like material cross is represented by a (mm) and an
outer diameter of the string-like material is represented by d (mm)
in the innermost circumference side of the storage container, such
that a relationship of d<a<10d is satisfied.
8. The storage package according to claim 1, wherein a height of
the tubular core rod is 100% to 150% of a highest lamination height
of the laminated string-like material.
9. The storage package according to claim 1, wherein the
string-like material is a hollow string.
10. The storage package according to claim 1, wherein the
string-like material is a hollow braided string.
11. The storage package according to claim 1, wherein a storage
starting end of the string-like material is disposed in a position
which is at least higher than a highest lamination height of the
laminated string-like material.
12. The storage package according to claim 11, wherein the storage
starting end of the string-like material protrudes outside the
storage container.
13. A method for storing a string-like material, the method
comprising the steps of: rotating a storage container such that
string-like materials disposed in the container cross at a certain
position while the storage container is rotated twice; deviating a
disposition trajectory of a the string-like material formed during
one period T (second) of a periodic change of a rotational speed R
(rpm) in a rotational direction of the storage container or in a
direction opposite to the rotational direction; and setting a
supply speed v (m/minute) of the string-like material, one period T
(second), and the rotational speed R (rpm) of the storage container
so that an average rotational speed R.sub.a (rpm) of the storage
container during one period T (second) satisfies Equation (1):
R.sub.a>v/L (1) wherein: L (m) is a circumference of the inner
wall surface side of the storage container; and the method stores
the string-like material in the rotating storage container by
periodically repeating a change pattern in which the rotational
speed R of the storage container is gradually decreased after being
gradually increased or the rotational speed R is gradually
increased after being decreased while the string-like material is
supplied into the storage container at a constant speed.
14. The method according to claim 13, further comprising: setting
the change pattern of the rotational speed (R) (rpm) of the storage
container so that a portion of the disposition trajectory of the
string-like material formed when the storage container is rotated
once passes through the vicinity of an outer wall of a core rod of
the storage container and the vicinity of an inner wall surface of
the storage container.
15. The method for storing the string-like material according to
claim 14, wherein: the vicinity of an outer wall of the core rod is
a region within 30% of a difference between a radius of the storage
container and a radius of the core rod; and the vicinity of an
inner wall surface is a region within 30% of the difference between
the radius of the storage container and the radius of the core
rod.
16. The method according to claim 13, wherein R.sub.a satisfies
Equation (2): 6v/5L<R.sub.a<4v/L (2).
17. The method according to claim 13, further comprising: setting a
bending radius R of the disposition trajectory of the string-like
material so that a relationship of L/4.pi.<R<L<2.pi. is
satisfied.
18. The method according to claim 13, wherein d<a<10d is
satisfied when a distance between a starting point and an ending
point of the disposition trajectory of the string-like material
formed during one period T (second) of a periodic change of the
rotational speed R (rpm) is represented by a (mm) and an outer
diameter of the string-like material is represented by d (mm).
19. The method according to claim 13, further comprising: setting
the change pattern of the rotational speed R (rpm) of the storage
container so that the disposition trajectory of the string-like
material formed when the storage container is rotated twice
encloses a rotating shaft of the storage container.
20. The method according to claim 13, wherein R.sub.a satisfies
Equation (3): 6v/5L<R.sub.a<12v/5L (3).
21. The method according to claim 13, wherein Equation (4) is
satisfied when a change width of the rotational speed of the
storage container is represented by R.sub.w (rpm):
0.64R.sub.a<R.sub.w<2R.sub.a (4).
22. The method according to claim 13, further comprising: supplying
the string-like material to the storage container from above the
storage container and the vicinity of the inner wall surface.
23. The method according to claim 13, wherein the string-like
material is a hollow string.
24. The method according to claim 13, wherein the string-like
material is a hollow braided string.
Description
TECHNICAL FIELD
[0001] The present invention relates to a storage package for a
string-like material and a method for storing the string-like
material.
[0002] The present application claims priority based on Japanese
Patent Application No. 2010-130365, filed Jun. 7, 2010, the content
of which is incorporated herein by reference.
BACKGROUND ART
[0003] As a method for storing a string-like material in a tubular
container, in PTL 1, a method is disclosed in which the string-like
material is supplied at a constant speed while a cylindrical
container is rotated, the rotational speed of the cylindrical
container is changed according to a predetermined rotational speed
pattern, and thus, the string-like material is disposed in a spiral
shape. According to this method, storage efficiency and storage
stability of the string-like material can be improved using a
simple storage mechanism.
[0004] In PTLs 2 and 3, a wire winder in which wires are stored in
the entire cylindrical container is disclosed.
[0005] Specifically, the winder disclosed in PTL 2 is a mechanism
in which a driver for winding the wire around the container is
disposed in a hollow unit of a fixed hollow cylindrical container
and the driver rotates a capstan, which discharges the wire above
the container storage unit, around a central axis of the container
while rotating the capstan. In addition, the winder includes a
swing mechanism which changes an inclination of a rotating shaft of
the capstan at a period different from the period of the
revolution.
[0006] The winder disclosed in PTL 3 includes a mechanism in which
a turntable rotating a storing medium, which is referred to as a
winding carrier and which winds and laminates the wire, is provided
to the wire discharged at a constant speed, and the turntable
eccentrically revolves while minutely rotating.
[0007] According to the winders disclosed in PTLs 2 and 3, the wire
inside the container can be stored at a trajectory which is
circular and in which each circle is deviated in the rotational
direction of the container or an opposite direction thereof. In the
above-described storage, the string-like material can be uniformly
stored inside the container.
CITATION LIST
Patent Literature
[0008] [PTL 1] Japanese Unexamined Patent Application, First
Publication No. 2009-263052 [0009] [PTL 2] Japanese Unexamined
Patent Application, First Publication No. H2-221072 [0010] [PTL 3]
Japanese Unexamined Patent Application, First Publication No.
S63-57476
SUMMARY OF THE INVENTION
Technical Problem
[0011] In the method for storing the string-like material disclosed
in PTL 1, the string-like material is stored in a spiral shape.
However, when the stored string-like material is discharged from
the storage container at a resting state, the string-like material
may be entangled. This is considered to be because the magnitude of
the twisting of the discharged string-like material is different
depending on the size of the spiral circle and twisting is easily
generated.
[0012] Moreover, in the storage mechanism of the wire disclosed in
PTLs 2 and 3, power is transmitted via several gears or shafts from
a single drive system and drives other rotations, and thus, the
mechanism is complicated. Moreover, when the storage form is
adjusted, there is a problem in that a member-changing operation
such as changing gears and adjusting a gear ratio, or the like is
required.
[0013] An object of the present invention is to provide a method
for storing a string-like material capable of uniformly storing the
string-like material inside a container according to a trajectory,
which is circular and in which each circle is deviated in a
rotational direction of the container or an opposite direction
thereof, even by a simple storage mechanism, and in which
disadvantages such as entanglement do not easily occur when the
string-like material is discharged from a resting state, and a
storage package in which the string-like material is stored in the
storage container.
Solution to the Problem
[0014] [1] A storage package for a string-like material which
stores the string-like material and is a tubular shape,
including:
[0015] a storage container which stores the string-like material;
and
[0016] a tubular core rod which is mounted on a center of a bottom
of the storage container,
[0017] wherein the string-like material is a plurality of
continuous loop shapes, and each loop of the plurality of loops is
laminated so that a winding center is deviated around an axis of
the storage container.
[0018] [2] In the storage package for a string-like material
described in [1], the plurality of continuous loops have
substantially the same shapes.
[0019] [3] In the storage package for a string-like material
according to [1] or [2], the string-like material which forms the
plurality of loops is disposed so as to enclose the core rod which
is mounted on the storage container.
[0020] [4] In the storage package for a string-like material
according to any one of [1] to [3], at least a portion of each loop
of the plurality of loops is disposed so as to pass the vicinity of
an outer wall of the core rod of the storage container and the
vicinity of an inner wall surface of the storage container.
[0021] [5] In the storage package for a string-like material
according to any one of [1] to [4], the vicinity of the outer wall
of the core rod of the storage container is a region in which a
distance from the outer wall of the core rod is within 30% of a
difference between the radius of the storage container and the
radius of the core rod, and the vicinity of the inner wall surface
of the storage container is a region within 30% of the difference
between the radius of the storage container and the radius of the
core rod.
[0022] [6] In the storage package for a string-like material
according to any one of [1] to [5], a minimum bending radius R of
each loop of the plurality of loops is equal to or more than the
radius of the core rod.
[0023] [7] In the storage package for a string-like material
according to any one of [1] to [7], when a distance between two
adjacent points in which the loop shapes of the string-like
material cross is represented by a (mm) and an outer diameter of
the string-like material is represented by d (mm) in the innermost
circumference side of the storage container, a relationship of
d<a<10d is satisfied.
[0024] [8] In the storage package for a string-like material
according to any one of [1] to [7], the height of the tubular core
rod is 100% to 150% of the highest lamination height of the
laminated string-like material.
[0025] [9] In the storage package for a string-like material
according to any one of [1] to [8], the string-like material is a
hollow string.
[0026] [10] In the storage package for a string-like material
according to any one of [1] to [9], the string-like material is a
hollow braided string.
[0027] [11] In the storage package for a string-like material
according to any one of [1] to [10], a storage starting end of the
string-like material is disposed in a position which is at least
higher than the highest lamination height of the laminated
string-like material.
[0028] [12] In the storage package for a string-like material
according to [11], the storage starting end of the string-like
material protrudes outside the storage container.
[0029] [13] A method for storing a string-like material, which
stores the string-like material in a rotating tubular storage
container by periodically repeating a change pattern in which a
rotational speed R (rpm) of the storage container is gradually
decreased after being gradually increased or the rotational speed R
is gradually increased after being decreased while the string-like
material is supplied into the storage container at a constant
speed, including the steps of: generating a place in which
string-like materials disposed in the container cross while the
storage container is rotated twice, deviating a disposition
trajectory of the string-like material formed during one period T
(second) of a periodic change of the rotational speed R (rpm) in a
rotational direction of the storage container or a direction
opposite to the rotational direction, and setting a supply speed v
(m/minute) of the string-like material, one period T (second), and
the rotational speed R (rpm) of the storage container so that an
average rotational speed R.sub.a (rpm) of the storage container
during one period T (second) satisfies a condition represented by
the following Equation (1).
R.sub.a>v/L (1)
[0030] (In Equation (1), L (m) is a circumference of the inner wall
surface side of the storage container).
[0031] [14] The method for storing the string-like material
according to [13], further including the step of: setting the
change pattern of the rotational speed (R) (rpm) of the storage
container so that a portion of the disposition trajectory of the
string-like material formed when the storage container is rotated
once passes through the vicinity of an outer wall of a core rod of
the storage container and the vicinity of an inner wall surface of
the storage container.
[0032] [15] In the method for storing the string-like material
according to [14], the vicinity of the outer wall of the core rod
is a region within 30% of a difference between the radius of the
storage container and the radius of the core rod, and the vicinity
of the inner wall surface is a region within 30% of the difference
between the radius of the storage container and the radius of the
core rod.
[0033] [16] In the method for storing the string-like material
according to any one of [13] to [15], R.sub.a satisfies a condition
of the following Equation (2).
6v/5L<R.sub.a<4v/L (2)
[0034] [17] The method for storing the string-like material
according to any one of [13] to [16], further including the step
of: setting a bending radius R of the disposition trajectory of the
string-like material so that a relationship of
L/4.pi.<R<L<2.pi. is satisfied.
[0035] [18] In the method for storing the string-like material
according to any one of [13] to [17], d<a<10d is satisfied
when a distance between a starting point and an ending point of the
disposition trajectory of the string-like material formed during
one period T (second) of a periodic change of the rotational speed
R (rpm) is represented by a (mm) and an outer diameter of the
string-like material is represented by d (mm).
[0036] [19] The method for storing the string-like material
according to any one of [13] to [18], further including the step
of: setting the change pattern of the rotational speed R (rpm) of
the storage container so that the disposition trajectory of the
string-like material formed when the storage container is rotated
twice encloses a rotating shaft of the storage container.
[0037] [20] In the method for storing the string-like material
according to any one of [13] to [19], R.sub.a satisfies a condition
of the following Equation (3).
6v/5L<R.sub.a<12v/5L (3)
[0038] [21] In the method for storing the string-like material
according to any one of [13] to [20], a condition of the following
Equation (4) is satisfied when a change width of the rotational
speed of the storage container is represented by R.sub.w (rpm).
0.64R.sub.a<R.sub.w<2R.sub.a (4)
[0039] [22] The method for storing the string-like material
according to any one of [13] to [21], further including the step
of: supplying the string-like material to the storage container
from above the storage container and the vicinity of the inner wall
surface.
[0040] [23] In the method for storing the string-like material
according to any one of [13] to [22], the string-like material is a
hollow string.
[0041] [24] In the method for storing the string-like material
according to any one of [13] to [23], the string-like material is a
hollow braided string.
Advantageous Effects of the Invention
[0042] According to a method for storing a string-like material,
the string-like material can be uniformly stored inside a container
according to a trajectory, which is circular and in which each
circle is deviated in a rotational direction of the container or an
opposite direction thereof, even by a simple storage mechanism, and
disadvantages such as entanglement do not easily occur when the
string-like material is discharged from a resting state.
BRIEF DESCRIPTION OF DRAWINGS
[0043] FIG. 1 is a schematic side view showing a storage apparatus
which is used in an embodiment of a method for storing a
string-like material of the present invention.
[0044] FIG. 2 is a longitudinal cross-sectional view of a storage
container which configures the storage apparatus shown in FIG.
1.
[0045] FIG. 3 is a view showing a disposition trajectory of the
string-like material in the embodiment of the method for storing
the string-like material of the present invention.
[0046] FIG. 4 is a graph showing an example of a change pattern of
rotational speed R.
[0047] FIG. 5 is a view showing another shape of the disposition
trajectory of the string-like material.
[0048] FIG. 6 is a view showing still another shape of the
disposition trajectory of the string-like material.
[0049] FIG. 7 is a graph showing another example of the change
pattern of the rotational speed R.
[0050] FIG. 8 is a view showing the disposition trajectory of the
string-like material which is formed in the change pattern shown in
FIG. 7.
[0051] FIG. 9 is a graph showing still another example of the
change pattern of the rotational speed R.
[0052] FIG. 10 is a view showing the disposition trajectory of the
string-like material which is formed in the change pattern shown in
FIG. 9.
[0053] FIG. 11 is a graph showing the change pattern of the
rotational speed in Example 1.
[0054] FIG. 12 is a graph showing the change pattern of the
rotational speed in Comparative Example 1.
[0055] FIG. 13 is a view showing the disposition trajectory of a
braided string in Comparative Example 1.
[0056] FIG. 14 is a longitudinal cross-sectional view of a storage
package of the present invention.
[0057] FIG. 15 is a longitudinal cross-sectional view showing
another shape of the storage package of the present invention.
[0058] FIG. 16 is a view showing a region in which a portion of the
string-like material is disposed.
[0059] FIG. 17 is a view showing a distance between two adjacent
points, in which loop shapes of the string-like material cross, in
the innermost circumferential side of the storage container.
DESCRIPTION OF EMBODIMENTS
[0060] <String-Like Material>
[0061] As a string-material used in the present invention, a hollow
string-like material is appropriately used in which a cross-section
perpendicular to a central axis in a longitudinal direction has an
approximately circular shape and which includes a structure having
one or more spaces along the longitudinal direction in the inner
portion. As a specific example of the string-like material, there
are string-materials which are braided from multifilament such as
hollow netted strings or braided strings and have high flexibility.
Among these, for example, from the viewpoint of particularly
exerting effects of the present invention, a hollow string such as
the hollow netted string or the hollow braided string is
preferable, and the hollow braided string is more preferable.
[0062] Moreover, as for string-like materials, in addition to the
hollow string-like material, a solid string-like material can be
used.
[0063] In addition, as for the string-like material, a hollow or
string-like support for supporting a hollow porous membrane which
is used as a filtration film may be used.
[0064] The outermost diameter of the string-like material is not
particularly limited, and the dimension of approximately 1 to 5 mm
is preferable in the present invention.
[0065] <Storage Apparatus>
[0066] FIG. 1 shows an embodiment of a storage apparatus which
performs a storage method of the present invention. A storage
apparatus 10 of the present example includes a storage container 12
which stores a string-like material 11, a rotating table 13 which
rotates the storage container 12, and a supply guide 14 which fixes
a supply position of the string-like material 11.
[0067] (Storage Container)
[0068] An outer diameter of the storage container 12 is
appropriately selected according to a storage amount of the
string-like material 11, a discharging form of the string-like
material 11, or the like.
[0069] In the present embodiment, as shown in FIG. 2, a core rod 15
is mounted in the center of the storage container 12. Due to the
flexibility of the string-like material 11, a portion in which the
string-like material is not disposed may occur in the center of the
storage container 12. However, if the core rod 15 is mounted, the
portion in which the string-like material 11 is not disposed can be
embedded, and thus, the storing form is more stable.
[0070] In addition, the height of the core rod is preferably 100 to
150% of the highest lamination height of the laminated string-like
material.
[0071] Here, "the highest lamination height" means the distance
from the bottom surface of the storage container 12 to the highest
point in which the string-like material is laminated.
[0072] (Rotating Table)
[0073] The rotating table 13 which rotates the storage container 12
is not particularly limited if it can easily install the storage
container 12 and can periodically change rotational speed R.
Preferably, the rotating table 13 is a driving type table which can
set the change pattern of the rotational speed R of the storage
container 12 in advance and includes a controller function which
can input a program to change the pattern of the rotational speed
R.
[0074] (Supply Guide)
[0075] In the present embodiment, the supply guide 14 is mounted
above the storage container 12 and in the vicinity of the inner
wall surface of the storage container 12. Here, the "vicinity of
the inner wall surface" means a range within approximately ten
times the outer diameter a (approximately 2.5 mm in a case of the
braided string) of the string-like material from the inner wall
surface. In this way, if the supply guide 14 is mounted, the
string-like material 11 can be uniformly stored inside the storage
container 12.
[0076] The supply guide 14 is not particularly limited if the
string-like material 11 can pass through and the supply position of
the string-like material 11 can be fixed. However, the supply guide
preferably has a ring shape which is larger than the outer diameter
of the string-like material 11. In addition, the surface of the
ring shape is more preferably a smooth shape without burrs or the
like.
[0077] <Storage Method>
[0078] An embodiment of a method for storing the string-like
material 11 using the storage apparatus 10 will be described.
[0079] In the present embodiment, the string-like material 11 is
stored in the storage container 12 by periodically repeating a
change pattern in which the rotational speed R (rpm) of the storage
container 12 is gradually decreased after being gradually increased
or the rotational speed R is gradually increased after being
decreased while the string-like material 11 is supplied into the
rotating storage container 12 at a constant speed via the supply
guide 14. At this time, as shown in FIG. 3, a supply speed v
(m/minute) of the string-like material 11, one period T (second),
and the rotational speed R (rpm) of the storage container 12 are
set so that places P in which the string-like material 11 crosses
are formed in a disposition trajectory of the string-like material
11 which is formed when the storage container 12 is rotated
twice.
[0080] Moreover, the supply speed v (m/minute) of the string-like
material 11, one period T (second), and the rotational speed R
(rpm) of the storage container 12 are set so that the disposition
trajectory of the string-like material 11 formed during one period
T of the periodic change of the rotational speed R is deviated in a
direction opposite to the rotational direction of the storage
container 12.
[0081] In addition, the supply speed v (m/minute) of the
string-like material 11, one period T (second), and the rotational
speed R (rpm) of the storage container 12 are set so that an
average rotational speed R.sub.a (rpm) of the storage container 12
satisfies the condition represented by the following Equation
(1).
R.sub.a>v/L (1)
[0082] In addition, in Equation (1), L (m) is the circumference of
the inner wall surface side of the tubular container (the storage
container 12 in the present embodiment).
[0083] The average rotational speed R.sub.a is preferably set so as
to satisfy the following Equation (2).
6v/5L<R.sub.a<4v/L (2)
[0084] The average rotational speed R.sub.a is more preferably set
so as to satisfy the following Equation (3).
6v/5L<R.sub.a<12v/5L (2)
[0085] The lower limit of Equation (2) is a case where the
string-like material is transferred at a maximum length while the
storage container is rotated once, that is, is a minimum average
rotational speed, and the upper limit of Equation (2) is a case
where the string-like material is transferred at a minimum length
while the storage container is rotated once, that is, is a maximum
average rotational speed.
[0086] The lower limit of Equation (3) is the same value as
Equation (2), and the upper limit of Equation (3) is a maximum
average rotation speed in a case where the string-like material is
transferred at a minimum length when one loop has a shape for
necessarily enclosing the center of the container while the storage
container is rotated once.
[0087] As shown in FIG. 4, the change pattern in which the
rotational speed R of the storage container 12 is increased or
decreased is periodically repeated while the string-like material
is supplied into the rotating storage container 12 at a constant
speed, and thus, the position in the circumferential direction of
the storage container 12 in which the string-like material 11 is
disposed can be changed.
[0088] In the present invention, the radius of the arc of the
string-like material is decreased by increasing the rotational
speed R, the radius of the arc of the string-like material 11 is
increased by decreasing the rotational speed R, and thus, the
disposition trajectory of the string-like material 11 can be a
circular trajectory which is eccentric from the rotating shaft. For
example, as shown in FIG. 3, the disposition trajectory which is
circular and in which the core rod 15 is disposed in the circle can
be formed.
[0089] In addition, as shown in FIG. 16, the preferable aspect of
the change pattern of the rotational speed R (rpm) of the storage
container 12 is set so that a portion of the disposition trajectory
of the string-like material 11 formed when the storage container 12
is rotated once passes through the vicinity 31 of the core rod
outer wall of the storage container and the vicinity 32 of the
inner wall surface of the storage container. Here, as the "vicinity
of the core rod outer wall", a distance d2 from the outer wall of
the core rod is preferably within 30% of a difference d1 between
the radius of the storage container and the radius of the core rod.
Moreover, as the "vicinity of the inner wall surface", a distance
d3 from the inner wall of the storage container is preferably
within 30% of the difference d1 between the radius of the storage
container and the radius of the core rod.
[0090] The "container radius of the storage container" or the
"radius of the storage container" means the distance from the
center of the storage container 12 to the inner wall surface of the
storage container.
[0091] A portion of the disposition trajectory of the string-like
material 11 formed when the storage container 12 is rotated once
sets the change pattern of the rotational speed R (rpm) so that the
distance d2 from the outer wall of the core rod is within 30% of
the difference d1 between the radius of the storage container and
the radius of the core rod and the distance d3 from the inner wall
of the storage container is within 30% of the difference d1 between
the radius of the storage container and the radius of the core rod,
and thus, the string-like material can be more uniformly stored in
the storage container 12.
[0092] In addition, FIG. 3 shows a case where d2 and d3 pass
through ranges of 0% to 30% of d1 respectively.
[0093] If a portion of the disposition trajectory of the
string-like material 11 passes through an intermediate region 12a
and an outer circumferential region 12b, the string-like material
11 can be more uniformly stored further in the entire storage
container 12.
[0094] In addition, in the present embodiment, the change pattern
of the rotational speed R (rpm) of the storage container 12 is set
so that the disposition trajectory of the string-like material 11
formed when the storage container 12 is rotated twice encloses the
rotating shaft C of the storage container 12. If the disposition
trajectory of the string-like material 11 formed when the storage
container 12 is rotated twice encloses the rotating shaft C of the
storage container 12, when the core rod 15 is mounted on the
container 12, the storing form is easily stable. Moreover, since
the length of the string-like material 11 which is stored per
rotation of the container when the string-like material 11 is
stored in the container 12 can be lengthened, anchorage of the
string-like material 11 per unit length is decreased, and thus,
entanglement does not easily occur when the string-like material 11
is discharged in a state where the container 12 is in a resting
state.
[0095] In addition, from the viewpoint of the storage efficiency,
when a distance between a circular starting point and a circular
ending point of the string-like material 11 formed during one
period T is represented by a (mm) and an outer diameter of the
string-like material 11 is represented by d, one period T is
preferably set so as to satisfy a condition of d<a<10d. If
d<a is satisfied, it is possible to suppress the adjacent loops
from being laminated in the height direction, and if a<10d is
satisfied, the string-like material can be stored in a dense state
in the storage package.
[0096] (Setting of Change Pattern of the Rotational Speed R)
[0097] The change pattern of the rotational speed R can be set
according to the following method in order to make the disposition
trajectory shown in FIG. 3.
[0098] First, when the change pattern of the rotational speed R is
set, the average rotational speed R.sub.a of the change pattern of
the rotational speed R is set.
[0099] Thereby, the stored length of the string-like material 11
per rotation of the storage container 12 is obtained. In the
disposition trajectory shown in FIG. 3, the length of the
string-like material 11 in one circle corresponds to the stored
length of the string-like material 11 per rotation of the storage
container 12.
[0100] Moreover, simultaneously, one circle of the string-like
material 11 to be obtained is formed, the circumference length is
measured, and the stored length L.sub.r (m/revolution) of the
string-like material 11 per rotation of the storage container 12 is
obtained from the measured value.
[0101] Moreover, the average rotational speed R.sub.a (rpm) is
obtained from the stored length L.sub.r (m/revolution) and the
supply speed v (m/minute) of the string-like material 11.
Specifically, R.sub.a is obtained from R.sub.a=v/L.sub.r.
[0102] Subsequently, one period T (refer to FIG. 4) of the periodic
change of the rotational speed R is determined.
[0103] Thereby, time (rotational period T.sub.a) per rotation of
the container from the average rotational speed R.sub.a determined
as above is determined from T.sub.a=60/R.sub.a.
[0104] Moreover, a deviation angle between the circular disposition
trajectory of the string-like material 11 formed during one
revolution of the storage container 12 and the circular disposition
trajectory formed during the next one revolution of the storage
container 12 is determined. At this time, in order to provisionally
determine the period T, the deviation angle may be provisionally
determined by estimating the disposition shape of the string-like
material 11 formed as shown in FIG. 3. From the viewpoint of the
storage efficiency, it is preferable having the deviation angle as
small as possible. However, if the deviation angle is too small,
the lamination height of the string-like material 11 is increased,
and thus, to the contrary effect, there is a concern that the
storage efficiency may be decreased. Thereby, preferably, the
deviation angle is appropriately corrected while observing the
storing state.
[0105] Time .DELTA.T (second) for generating the deviation angle
.DELTA..theta.(.degree.) is obtained from
.DELTA.T=T.sub.a).DELTA..theta./360(.degree.).
[0106] Moreover, one period T is T.sub.a+.DELTA.T. Therefore, one
period T can be obtained from
T.sub.a+T.sub.a.DELTA..theta./360.
[0107] In addition, if .DELTA.T (second) is 0 second, T=T.sub.a is
satisfied, the rotation angle of the storage container 12 during
one period of the periodic change of the rotational speed R becomes
360.degree., and thus, the deviation for every one period T in the
circular disposition trajectory of the string-like material 11 is
not present. This case does not become the disposition trajectory
in which the circles are slightly deviated as shown in FIG. 3.
Therefore, .DELTA.T is not 0.
[0108] Moreover, the change width of the rotational speed R is
determined.
[0109] The larger the change width of the rotational speed R, the
larger the eccentricity of the trajectory of the string-like
material 11 from the rotating shaft of the storage container 12. In
addition, the smaller the change width of the rotational speed R,
the smaller the eccentric state. If the change width is 0, the
trajectory of the string-like material 11 has the rotating shaft C
as the center.
[0110] Since the change width also depends on the flexibility or
the supply speed of the string-like material 11, even though the
intended disposition trajectories are the same as each other, the
change width cannot be univocally determined, and it is necessary
to appropriately select the change width according to the
flexibility or the supply speed of the string-like material 11.
[0111] Thereby, first, the change width of the rotational speed R
is provisionally set, and the trajectory of the string-like
material 11 in the change pattern of the rotational speed R (the
average rotational speed and one period are represented by R.sub.a
and T respectively) is observed. The obtained trajectory is close
to the center of the rotating shaft C, and thus, when the
trajectory is required so as to be distant from the rotating shaft
C, the change width of the rotational speed R is increased. The
obtained trajectory is distant from the center of the rotating
shaft, and thus, when the obtained trajectory is required so as to
be close to the rotating shaft C, the change width of the
rotational speed R is decreased. Thereafter, the trajectory of the
string-like material 11 is observed again, and the change width is
adjusted when the observed trajectory is different from the desired
trajectory. The change width is determined by repeating the
adjustment of the change width.
[0112] Moreover, if necessary, from the viewpoint of the storage
efficiency, one period T may be further finely adjusted. That is,
the deviation angle .DELTA..theta.(.degree.) can be decreased by
performing a fine correction which decreases .DELTA.T (second), and
thus, the storage efficiency can be further increased.
[0113] As described above, the change pattern of the rotational
speed R is set by determining the average rotational speed R.sub.a,
one period T, and the change width of the rotational speed R.
[0114] When the change width of the rotational speed R is
represented by R.sub.w (rpm), R.sub.w preferably satisfies the
following Equation (4).
0.64R.sub.a<R.sub.w<2R.sub.a (4)
[0115] If the change width R.sub.w is less than 0.64R.sub.a, the
loop of the string-like material is not eccentric, and there is a
concern that the loop may not be disposed in the vicinity of the
outer wall of the core rod or the vicinity of the inner wall of the
container. In addition, if the change width is larger than
2R.sub.a, there is a concern that the loop of the string-like
material may not be finely stored in the storage package.
[0116] In addition, the rotation of the storage container 12 is
carried out by the rotation of a motor which drives the rotating
table. However, in general, it is difficult to smoothly change the
rotational speed of the motor. Therefore, it does not need to
strictly follow the change pattern of the rotational speed R
obtained as described, and the rotational speed R may be changed in
a step shape while having the change pattern as the target
value.
[0117] Moreover, it is also considered that the change pattern of
the set rotational speed R and the change pattern of an actual
rotational speed R are different from each other. When the
deviation angle AO is small, and if the target change pattern is
different, a great influence may occur. Thus, the rotational period
T.sub.a of the storage container 12 is measured, and when the
rotational pattern is not the target rotational pattern,
preferably, the average rotational speed R.sub.a is finely
adjusted.
[0118] As described above, in the method for manufacturing the
string-like material of the present embodiment in which a place
where the string-like material 11 crosses is generated in the
disposition trajectory of the string-like material 11, formed when
the storage container 12 is rotated twice, and the disposition
trajectory of the string-like material 11 formed during one period
T (second) is deviated in the direction opposite to the rotational
direction of the storage container 12, and the average rotational
speed R.sub.a (rpm) satisfies R.sub.a>V/L, even with the simple
storage mechanism, then the string-like material 11 can be
uniformly stored inside the storage container 12 according to the
trajectory which is circular and in which each circle is deviated
in the direction opposite to the rotational direction of the
storage container 12. In addition, since the twisting is decreased
when the string-like material 11 is discharged from the storage
container 12 at a resting state, the twisting is decreased, and an
occurrence such as entanglement can be prevented. Moreover, in a
case where the place in which the string-like material 11 crosses
is not generated in the disposition trajectory of the string-like
material 11, when the average rotational speed R.sub.a (rpm) does
not satisfy R.sub.a>v/L, the disadvantage when the string-like
material 11 is discharged cannot be prevented. When the circular
trajectory of the string-like material 11 is not deviated, a
uniform storage is not easily performed.
[0119] (Storage Package)
[0120] FIG. 14 shows an example of a storage package which stores
the string-like material according to the present invention.
[0121] A storage package 20 according to the present invention
includes the storage container 12, and the tubular core rod 15
which is mounted in the center of the bottom of the storage
container 12. In the storage container 12, the string-like material
11 forms a plurality of continuous loop shapes, and each loop is
stored in a state where the winding center of the loop is deviated
around the core rod 15 and the loop is laminated.
[0122] The plurality of loop shapes of the laminated string-like
material preferably have substantially the same shape as one
another.
[0123] Here, the "substantially same shape" may be the state in
which the string-like material 11 stored in the storage container
12 forms the plurality of continuous loop shapes and the winding
center of each loop is deviated around the core rod 15 and the loop
is laminated, and means that the substantially same shape also
includes a shape in which each loop shape of the string-like
material 11 is not completely the same.
[0124] The string-like material 11 which forms the plurality of
loops is preferably disposed so as to enclose the core rod 15
mounted on the storage package 20.
[0125] At least a portion of each loop of the plurality of loops is
more preferably disposed so as to pass the vicinities of the outer
wall of the core rod and the inner wall surface of the storage
container.
[0126] Here, the storage package 20 includes the following
configurations (1) to (3).
[0127] (1) The storage container 12
[0128] (2) The tubular core rod 15 which is mounted in the center
of the bottom of the storage container 12
[0129] (3) The string-like material 11 which forms the plurality of
continuous loop shapes
[0130] In addition, the "vicinity of the outer wall of the core
rod" and the "vicinity of the inner wall surface" are the same as
the above-described definition.
[0131] "Being disposed so as to enclose the core rod" means that
the laminated string-like material 11 encloses the core rod and
forms the plurality of loop shapes.
[0132] "Being disposed so as to pass the vicinity of the outer wall
of the core rod and the vicinity of the inner wall surface of the
storage package" means that a portion of the string-like material
11 which forms the plurality of laminated loop shapes passes the
regions of the vicinity of the outer wall of the core rod and the
vicinity of the inner wall surface of the storage container 12.
[0133] Moreover, "the outer wall of the core rod" means the outer
circumferential surface of the core rod 15.
[0134] According to the above-described disposition, load collapse
of the stored string-like material does not easily occur.
[0135] Moreover, a storage starting end 23 of the string-like
material is preferably disposed in a position which is at least
higher than the highest lamination height of the laminated
string-like material and more preferably protrudes outside the
storage container 12. Thereby, the connection of the string to the
string-like material which is stored in the next storage container
is easily performed.
[0136] Here, the "storage starting end" is the end of the
string-like material 11 stored in one storage package 20 and means
a portion in which the string is connected to the string-like
material which is stored in the next container.
[0137] The outer diameter of the string-like material is preferably
0.5 mm to 5.0 mm.
[0138] The inner diameter of the storage container is preferably
400 mm to 500 mm.
[0139] The height of the storage container is preferably 500 mm to
1000 mm.
[0140] The outer diameter of the core rod is preferably 100 mm to
150 mm.
[0141] The storage package according to the present invention may
include a cover on the upper portion of the storage container.
[0142] FIG. 15 shows a storage package 30 which includes the cover.
The storage package 30 according to the present invention includes
the tubular core rod 15 which is mounted in the center of the
bottom of the storage container 12. In the storage container 12,
the string-like material 11 forms the plurality of continuous loop
shapes, and each loop is stored in the state where the winding
center of the loop is deviated around the core rod 15 and the loop
is laminated. Moreover, the storage container 12 includes the cover
25 on the upper portion. The storage starting end 23 of the
string-like material may protrude from the cover through the inner
wall surface of the storage container 21. According to the
above-described disposition, the string connection to the
string-like material which is stored in the next storage container
is easily performed.
[0143] A minimum bending radius R of each loop of the plurality of
loops of the string-like material stored in the storage package is
preferably equal to or more than the radius of the core rod 15.
According to the setting, the anchored state at the time of the
discharging becomes uniform, and a bending tendency does not easily
remain in the string-like material.
[0144] The bending radius R of the plurality of loops may be
constant from the starting point of the loop to the ending point,
or may be changed.
[0145] As shown in FIG. 17, in the storage packages 20 or 30
according to the present invention, when the distance between the
adjacent two points (P1 and P2) in which the loop shapes of the
string-like material 11 cross is represented by a (mm) and the
outer diameter of the string-like material 11 is represented by d
(mm) in the innermost circumference side of the storage container
12, a relationship of d<a<10d is preferably satisfied.
[0146] Here, "the innermost circumference side of the storage
container 12" means a portion in which the distance from the center
of the storage container 12 is the closest distance.
[0147] If d<a is satisfied, it is possible to suppress the
adjacent loops from being laminated in the height direction, and if
a<10d is satisfied, the string-like material 11 can be stored in
a dense state in the storage container 12.
[0148] In addition, the present invention is not limited to the
above-described embodiment. For example, in FIG. 3, the disposition
trajectory of the string-like material 11 shows the circular
trajectory which is eccentric from the rotating shaft. However, the
disposition trajectory is not limited to the circular shape.
[0149] Moreover, as shown in FIG. 5, the disposition trajectory of
the string-like material 11 passes through the outer
circumferential region 12b. However, the disposition trajectory may
be a trajectory which does not pass through the intermediate region
12a.
[0150] In addition, as shown in FIG. 6, the disposition trajectory
of the string-like material 11 formed when the storage container 12
is rotated twice may not enclose the rotating shaft C of the
storage container 12.
[0151] Moreover, as shown in FIG. 7, the change pattern of the
rotational speed R may be a pattern in which the storage container
12 is rotated once or more during two periods 2T of the periodic
change of the rotational speed R. In the pattern in which the
storage container 12 is rotated once or more during two periods 2T
of the periodic change of the rotational speed R, as shown in FIG.
8, an elliptical disposition trajectory can be formed. Moreover, as
shown in FIG. 9, the change pattern may be a pattern in which the
storage container 12 is rotated twice or more during three periods
3T of the periodic change of the rotational speed R. In the pattern
in which the storage container 12 is rotated twice or more during
three periods 3T of the periodic change of the rotational speed R,
as shown in FIG. 10, a trefoil shaped disposition trajectory may be
formed.
[0152] The circular trajectory of the string-like material 11 may
also be deviated in the rotational direction of the storage
container 12. In this case, one period T of the periodic change of
the rotational speed R is set to T.sub.a-.DELTA.T, that is, to
T.sub.a-T.sub.a-.DELTA..theta./360.
[0153] Moreover, in the present invention, the supply guide 14 may
not be mounted above the storage container 12 and in the vicinity
of the inner wall surface of the storage container 12. For example,
the supply guide may be mounted above the storage container 12 and
in the vicinity of the center of the rotating shaft.
[0154] In addition, in the present invention, the shape of the
container is not limited to the cylinder and may be a tubular
container in which the bottom surface has a polygon (rectangle,
hexagon, octagon, or the like).
[0155] Moreover, the shape of the core rod mounted on the storage
container is preferably a cylindrical shape. However, the shape of
the core rod is not limited to a cylindrical shape.
EXAMPLES
[0156] Hereinafter, the present invention will be specifically
described according to Examples. However, the present invention is
not limited thereto.
[0157] As the stored string-like material, a braided string having
an outer diameter of about 2.5 mm and an inner diameter of about
1.8 mm in which raw polyester yarns ("84dtex-72fil" made by NANYA),
circularly made while being bundled five times, was used. The
braided string was supplied to a container while being continuously
braided at a speed of 100 m/hour and was stored.
[0158] The configuration shown in FIG. 1 was used as a storage
apparatus. As the storage container 12, a cylindrical paper drum
was used, which had a structure in which the core rod 15 having the
outer diameter of about 130 mm was mounted on the center of the
internal volume having the inner diameter of about 450 mm and the
height of about 820 mm.
[0159] The rotating table 13 was used which had a structure which
was rotated by the driving of a brushless DC motor (made by the
ORIENTAL COMPANY) controllable in the range of 0.4 to 20 rpm. A
change pattern program was input in a sequence in advance, and the
rotational speed R was changed by a system in which the rotational
speed command was output to the motor driver according to the
change pattern of the rotational speed R from the sequence at the
same time of pushing a start button.
[0160] As the supply guide 14, a snail guide (made by the YUASA
THREAD GUIDE INDUSTRY COMPANY) having a hole diameter of about 6 mm
was used. The supply guide 14 was mounted above the storage
container 12 and in the vicinity of the inner wall surface of the
storage container 12. Thereby, the braided string dropped through
the supply guide 14 and substantially contacted the inner wall
surface of the storage container 12.
Example 1
[0161] The period T and the rotational speed R were set so that the
place in which the braided string crossed twice was generated in
the disposition trajectory of the braided string formed when the
storage container 12 was rotated twice as shown in FIG. 3, and the
disposition trajectory of the braided string formed during one
period T was circular and the circle was deviated in the direction
opposite to the rotational direction of the container using the
above-described storage apparatus 10. Specifically, the change
pattern of the rotational speed R of a step shape shown in FIG. 11
(one period T: 34 seconds and average rotational speed R.sub.a:
1.75 rpm) was set. Here, the circumference L of the inner wall
surface side of the tubular container is 0.45
m.times..pi..apprxeq.1.41 mm, and if 100 m/hour of the supply speed
v of the braided string is converted per minute, it becomes 1.67
m/minute. Therefore, it is satisfied that v/L.apprxeq.1.18/minute
and the average rotational speed Ra=1.75>v/L.
[0162] According to the change pattern of the rotational speed R,
the braided string (string-like material) 11 was stored inside the
storage container 12 while the storage container 12 was rotated. As
a result, the braided strings of the amount of about 10,000 m were
stored during the storage time of about 100 hours according to the
disposition trajectory shown in FIG. 3. Moreover, in the present
example, the disposition trajectory of the string-like material 11
formed when the storage container 12 was rotated once, passed
through the intermediate region and the outer circumferential
region, and the disposition trajectory of the string-like material
11 formed when the storage container 12 was rotated twice, became
the trajectory enclosing the rotating shaft C of the storage
container.
[0163] This storing form was not easily collapsed, and when the
braided string was discharged at a speed of 10 m/minute from the
stationary storage container 12, the braided string could be stably
discharged without occurrence of entanglement.
Comparative Example 1
[0164] The period T and the rotational speed R were set so that the
place in which the braided string crossed was not generated in the
disposition trajectory of the braided string formed when the
storage container 12 was rotated twice, and the disposition
trajectory of the braided string formed during one period T was
formed in a spiral shape using the above-described storage
apparatus 10. Specifically, the change pattern of the rotational
speed R of a step shape shown in FIG. 12 (one period T: 52 minutes
and average rotational speed R.sub.a: 2.7 rpm) was set. Here, the
circumference L of the inner wall surface side of the tubular
container is 0.45 m.times..pi..apprxeq.1.41 mm, and if 100 m/hour
of the supply speed v of the braided string is converted per
minute, it becomes 1.67 m/minute. Therefore, it is satisfied that
v/L=1.18/minute and the average rotational speed
Ra=2.75>v/L.
[0165] According to the change pattern of the rotational speed R,
the braided string (string-like material) 11 was stored inside the
storage container 12 while the storage container 12 was rotated. As
a result, as shown in FIG. 13, the braided string could be disposed
in a spiral shape having the core rod 15 as the axis. In addition,
the braided strings of the amount of about 10,000 m were stored
during the storage time of about 100 hours.
[0166] In this storage, gaps were partially formed in the vicinity
of the inner wall surface of the storage container 12 and in the
vicinity of the core rod 15, and the braided string was dropped to
the portions and was stored. Thereby, when the braided string was
discharged at a speed of 10 m/minute from the stationary storage
container, the braided string was caught and could not be smoothly
discharged. Moreover, in the disposition of the spiral shape, since
the twisting was increased at the time of discharging and the
braided string was discharged in a twisted state, the braided
string was deviated from the guide on its path or was caught.
INDUSTRIAL APPLICABILITY
[0167] Since a string-like material forms a plurality of continuous
loop shapes and each loop is stored in a storage container in a
state where a winding center of the loop is deviated and the loop
is laminated, the string like-material can be uniformly stored and
disadvantages such as entanglement do not easily occur when the
string-like material is discharged from the resting state, and
thus, for example, a storage package of the string-like material
according to the present invention is appropriately used for
storing a hollow shaped string-like material.
REFERENCE SIGNS LIST
[0168] 10: storage apparatus [0169] 11: string-like material [0170]
12: storage container [0171] 12a: intermediate region [0172] 12b:
outer circumferential region [0173] 13: rotating table [0174] 14:
supply guide [0175] 15: core rod [0176] 20: storage package [0177]
22: laminated string-like material [0178] 23: storage starting end
[0179] 25: cover [0180] 30: storage package
* * * * *