US20130140388A1

US20130140388A1 - Storage package for string-like material and method for storing string-like material

Info

Publication number: US20130140388A1
Application number: US13/702,145
Authority: US
Inventors: Masaki Kurashina; Yasuo Hiromoto; Toshinori Sumi; Hiroyuki Fujiki
Original assignee: Mitsubishi Rayon Co Ltd
Current assignee: Mitsubishi Chemical Corp
Priority date: 2010-06-07
Filing date: 2011-06-07
Publication date: 2013-06-06
Also published as: WO2011155497A1; CN103108822A; JPWO2011155497A1; KR20130025940A; JP5226871B2; KR101434806B1; CN103108822B

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.

Description

TECHNICAL FIELD

The present invention relates to a storage package for a string-like material and a method for storing the string-like material.
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

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.
In PTLs 2 and 3, a wire winder in which wires are stored in the entire cylindrical container is disclosed.
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.
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.
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

[PTL 1] Japanese Unexamined Patent Application, First Publication No. 2009-263052
[PTL 2] Japanese Unexamined Patent Application, First Publication No. H2-221072
[PTL 3] Japanese Unexamined Patent Application, First Publication No. S63-57476

SUMMARY OF THE INVENTION

Technical Problem

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.
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.
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

[1] A storage package for a string-like material which stores the string-like material and is a tubular shape, including:
a storage container which stores the string-like material; and
a tubular core rod which is mounted on 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 loops is laminated so that a winding center is deviated around an axis of the storage container.
[2] In the storage package for a string-like material described in [1], the plurality of continuous loops have substantially the same shapes.
[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.
[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.
[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.
[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.
[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.
[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.
[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.
[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.
[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.
[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.
[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_a(rpm) of the storage container during one period T (second) satisfies a condition represented by the following Equation (1).
R _a >v/L (1)
(In Equation (1), L (m) is a circumference of the inner wall surface side of the storage container).
[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.
[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.
[16] In the method for storing the string-like material according to any one of [13] to [15], R_asatisfies a condition of the following Equation (2).
6v/5L<R _a<4v/L (2)
[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/4π<R<L<2π is satisfied.
[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).
[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.
[20] In the method for storing the string-like material according to any one of [13] to [19], R_asatisfies a condition of the following Equation (3).
6v/5L<R _a<12v/5L (3)
[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_w(rpm).
0.64R _a <R _w<2R _a (4)
[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.
[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.
[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

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

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.

FIG. 2 is a longitudinal cross-sectional view of a storage container which configures the storage apparatus shown in FIG. 1.

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.

FIG. 4 is a graph showing an example of a change pattern of rotational speed R.

FIG. 5 is a view showing another shape of the disposition trajectory of the string-like material.

FIG. 6 is a view showing still another shape of the disposition trajectory of the string-like material.

FIG. 7 is a graph showing another example of the change pattern of the rotational speed R.

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.

FIG. 9 is a graph showing still another example of the change pattern of the rotational speed R.

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.

FIG. 11 is a graph showing the change pattern of the rotational speed in Example 1.

FIG. 12 is a graph showing the change pattern of the rotational speed in Comparative Example 1.

FIG. 13 is a view showing the disposition trajectory of a braided string in Comparative Example 1.

FIG. 14 is a longitudinal cross-sectional view of a storage package of the present invention.

FIG. 15 is a longitudinal cross-sectional view showing another shape of the storage package of the present invention.

FIG. 16 is a view showing a region in which a portion of the string-like material is disposed.

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

<String-Like Material>
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.
Moreover, as for string-like materials, in addition to the hollow string-like material, a solid string-like material can be used.
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.
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.
<Storage Apparatus>
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.
(Storage Container)
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.
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.
In addition, the height of the core rod is preferably 100 to 150% of the highest lamination height of the laminated string-like material.
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.
(Rotating Table)
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.
(Supply Guide)
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.
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.
<Storage Method>
An embodiment of a method for storing the string-like material 11 using the storage apparatus 10 will be described.
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.
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.
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_a(rpm) of the storage container 12 satisfies the condition represented by the following Equation (1).
R _a >v/L (1)
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).
The average rotational speed R_ais preferably set so as to satisfy the following Equation (2).
6v/5L<R _a<4v/L (2)
The average rotational speed R_ais more preferably set so as to satisfy the following Equation (3).
6v/5L<R _a<12v/5L (2)
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.
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.
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.
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.
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.
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.
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.
In addition, FIG. 3 shows a case where d2 and d3 pass through ranges of 0% to 30% of d1 respectively.
If a portion of the disposition trajectory of the string-like material 11 passes through an intermediate region 12 a and an outer circumferential region 12 b, the string-like material 11 can be more uniformly stored further in the entire storage container 12.
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.
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.
(Setting of Change Pattern of the Rotational Speed R)
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.
First, when the change pattern of the rotational speed R is set, the average rotational speed R_aof the change pattern of the rotational speed R is set.
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.
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_r(m/revolution) of the string-like material 11 per rotation of the storage container 12 is obtained from the measured value.
Moreover, the average rotational speed R_a(rpm) is obtained from the stored length L_r(m/revolution) and the supply speed v (m/minute) of the string-like material 11. Specifically, R_ais obtained from R_a=v/L_r.
Subsequently, one period T (refer to FIG. 4) of the periodic change of the rotational speed R is determined.
Thereby, time (rotational period T_a) per rotation of the container from the average rotational speed R_adetermined as above is determined from T_a=60/R_a.
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.
Time ΔT (second) for generating the deviation angle Δθ(°) is obtained from ΔT=T_a·)Δθ/360(°).
Moreover, one period T is T_a+ΔT. Therefore, one period T can be obtained from T_a+T_a·Δθ/360.
In addition, if ΔT (second) is 0 second, T=T_ais satisfied, the rotation angle of the storage container 12 during one period of the periodic change of the rotational speed R becomes 360°, 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, ΔT is not 0.
Moreover, the change width of the rotational speed R is determined.
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.
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.
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_aand 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.
Moreover, if necessary, from the viewpoint of the storage efficiency, one period T may be further finely adjusted. That is, the deviation angle Δθ(°) can be decreased by performing a fine correction which decreases ΔT (second), and thus, the storage efficiency can be further increased.
As described above, the change pattern of the rotational speed R is set by determining the average rotational speed R_a, one period T, and the change width of the rotational speed R.
When the change width of the rotational speed R is represented by R_w(rpm), R_wpreferably satisfies the following Equation (4).
0.64R _a <R _w<2R _a (4)
If the change width R_wis less than 0.64R_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_a, there is a concern that the loop of the string-like material may not be finely stored in the storage package.
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.
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_aof the storage container 12 is measured, and when the rotational pattern is not the target rotational pattern, preferably, the average rotational speed R_ais finely adjusted.
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_a(rpm) satisfies R_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_a(rpm) does not satisfy R_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.
(Storage Package)
FIG. 14 shows an example of a storage package which stores the string-like material according to the present invention.
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.
The plurality of loop shapes of the laminated string-like material preferably have substantially the same shape as one another.
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.
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.
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.
Here, the storage package 20 includes the following configurations (1) to (3).
(1) The storage container 12
(2) The tubular core rod 15 which is mounted in the center of the bottom of the storage container 12
(3) The string-like material 11 which forms the plurality of continuous loop shapes
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.
“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.
“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.
Moreover, “the outer wall of the core rod” means the outer circumferential surface of the core rod 15.
According to the above-described disposition, load collapse of the stored string-like material does not easily occur.
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.
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.
The outer diameter of the string-like material is preferably 0.5 mm to 5.0 mm.
The inner diameter of the storage container is preferably 400 mm to 500 mm.
The height of the storage container is preferably 500 mm to 1000 mm.
The outer diameter of the core rod is preferably 100 mm to 150 mm.
The storage package according to the present invention may include a cover on the upper portion of the storage container.
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.
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.
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.
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.
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.
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.
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.
Moreover, as shown in FIG. 5, the disposition trajectory of the string-like material 11 passes through the outer circumferential region 12 b. However, the disposition trajectory may be a trajectory which does not pass through the intermediate region 12 a.
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.
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.
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_a−ΔT, that is, to T_a−T_a−Δθ/360.
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.
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).
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

Hereinafter, the present invention will be specifically described according to Examples. However, the present invention is not limited thereto.
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.
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.
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.
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

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_a: 1.75 rpm) was set. Here, the circumference L of the inner wall surface side of the tubular container is 0.45 m×π≅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=1.75>v/L.
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.
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

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_a: 2.7 rpm) was set. Here, the circumference L of the inner wall surface side of the tubular container is 0.45 m×π≅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.
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.
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

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

- 10: storage apparatus
- 11: string-like material
- 12: storage container
- 12 a: intermediate region
- 12 b: outer circumferential region
- 13: rotating table
- 14: supply guide
- 15: core rod
- 20: storage package
- 22: laminated string-like material
- 23: storage starting end
- 25: cover
- 30: storage package

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_a(rpm) of the storage container during one period T (second) satisfies Equation (1):

R _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_asatisfies Equation (2):

6v/5L<R _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/4π<R<L<2π 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_asatisfies Equation (3):

6v/5L<R _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_w(rpm):

0.64R _a <R _w<2R _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.