Optical fiber carrying tube package and support member for optical fiber carrying tube package

Abstract

To provide an optical fiber carrying tube package capable of storing a long optical fibber carrying tube and capable of winding out as required.SOLUTION: An optical fiber carrying tube package 1 comprises: an optical fiber carrying tube 11 which has a long cylindrical shape and has one or more optical fibers in a cylindrical wall; a wound body 12 in which the optical fiber carrying tube 11 is wound on a bobbin 21 having a columnar trunk part 22, a flange part 23 existing on both ends of the trunk part 22 and a rotational shaft 24 penetrating through the trunk part 22; and a box body 31 for housing the wound body 12. The box body 31 has a lower box 32 whose upper part is opened and an upper box 33 attachably and detachably closing the opening part of the lower box 32. The lower box 32 has a bearing part 34 for rotatably holding the rotational shaft 24.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to optical fiber carrier tube packages and support members for optical fiber carrier tube packages. [Background technology]

[0002] As a sensor capable of monitoring the displacement of a structure using an optical fiber, for example, an optical fiber carrying tube equipped with an optical fiber is used. The optical fiber carrying tube is, for example, a long plastic tube integrally equipped with an optical fiber extending in the axial direction of the plastic tube. The optical fiber carrying tube is laid in a desired location, and the optical fiber is connected to a measuring instrument. The measuring instrument can constantly monitor changes in strain (bending, stretching, twisting), pressure, and temperature occurring in the plastic tube from frequency or phase changes of Rayleigh scattering of the optical fiber.

[0003] Patent Document 1 proposes a storage box for transporting wires such as coaxial cables and electric wires, which rotatably stores bobbins around which wires are wound, and which can be unwound as needed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Registered Utility Model No. 3038095 Summary of the Invention [Problem to be solved by the invention]

[0005] However, optical fibers are difficult to handle because they are prone to breaking under stress, and it is difficult to apply the techniques used for coaxial cables, electric wires, etc. to optical fiber support tubes. SUMMARY OF THE INVENTION The present invention is directed to an optical fiber carrying tube package that can store a long optical fiber carrying tube and can be unwound as needed. [Means for solving the problem]

[0006] The present invention has the following aspects. <1> an optical fiber carrying tube having a long cylindrical shape and having one or more optical fibers in the cylindrical wall; a bobbin having a cylindrical body, flanges at both ends of the body, and a rotation shaft passing through the body, and the optical fiber carrying tube is wound around the bobbin; a box body that accommodates the wound body, The box body includes a lower box having an open top and an upper box that detachably closes the opening of the lower box, The optical fiber carrying tube package, wherein the lower box has a bearing portion that rotatably holds the rotation shaft. <2> The upper box has an openable side surface parallel to the axial direction of the rotation shaft. <1> The optical fiber support tube package according to claim 1. <3> The openable side surface has an easy-to-open portion extending in a direction perpendicular to the axial direction of the rotation shaft. <2> The optical fiber support tube package according to claim 1. <4> A friction material is present in the lower box, which presses the bobbin in a direction parallel to the axial direction of the rotation shaft. <1> ~ <3> The optical fiber support tube package according to any one of claims 1 to 4. <5> The bobbin has a fixing member that fixes the optical fiber carrying tube in contact with the inner surface of the flange portion of the bobbin. <1> ~ <4> The optical fiber support tube package according to any one of claims 1 to 4. <6> The lower box has one or more hand holes on a side surface perpendicular to the axial direction of the rotation shaft. <1> ~ <5> The optical fiber support tube package according to any one of claims 1 to 4. <7> A locking hole for locking an anti-tip member is provided on a side surface of the lower box that is perpendicular to the axial direction of the rotation shaft. <1> ~ <6> The optical fiber support tube package according to any one of claims 1 to 4. <8> The lower box and the upper box are made of resin cardboard. <1> ~ <7> The optical fiber support tube package according to any one of claims 1 to 4. <9> The aforementioned <1> ~ <8> A plate-shaped support member for supporting the optical fiber support tube package according to any one of the preceding claims, A support member for an optical fiber carrying tube package, having a plurality of V-shaped grooves on the upper surface arranged continuously in the groove width direction, one wall surface of each V-shaped groove abutting the bottom surface of the optical fiber carrying tube package, and the other wall surface abutting the side surface of the optical fiber carrying tube package. [Effects of the Invention]

[0007] According to the present invention, an optical fiber carrying tube package capable of storing a long optical fiber carrying tube and being unwound as required, and a support member for the optical fiber carrying tube package, can be obtained. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view of an optical fiber support tube package according to an embodiment of the present invention. [Figure 2] 2 is a front view of the optical fiber carrying tube package of FIG. 1. [Figure 3] 2 is an explanatory diagram of a method for unpacking the optical fiber carrying tube package of FIG. 1. FIG. [Figure 4] 10A and 10B are explanatory diagrams of a method of using the optical fiber carrying tube package. [Figure 5] 10A is a cross-sectional view showing a modified example of an optical fiber carrying tube package, and FIG. 10B is an enlarged cross-sectional view of a main part taken along line BB. [Figure 6] FIG. 10 is a front view showing a modified example of the optical fiber carrying tube package. [Figure 7] FIG. 10 is a perspective view showing a modified example of the optical fiber carrying tube package. [Figure 8] 1A and 1B are perspective views showing a support member for an optical fiber carrying tube package according to one embodiment of the present invention, in which FIG. 1A is a perspective view showing a state of use, and FIG. 1B is an enlarged view of a main portion. DETAILED DESCRIPTION OF THE INVENTION

[0009] In this specification and claims, the use of "to" indicating a range of values ​​means that the values ​​before and after it are included as the lower and upper limits.

[0010] Hereinafter, an optical fiber carrying tube package according to an embodiment of the present invention will be described with reference to the drawings. The following diagrams are schematic diagrams for easily explaining the configuration.

[0011] 1 and 2 show an optical fiber carrying tube package according to one embodiment of the present invention, with FIG. 1 being a cross-sectional view taken along line II in FIG. 2, and FIG. 2 being a front view. The optical fiber carrying tube package (hereinafter also simply referred to as "package") 1 of this embodiment includes a wound body 12 in which an optical fiber carrying tube 11 is wound around a bobbin 21, and a box 31 that houses the wound body 12. Hereinafter, the thickness direction of the box 31 is defined as the X direction, the height direction as the Y direction, and the width direction as the Z direction. The direction of the axis Q of the rotation shaft 24 of the bobbin 21 is the X direction.

[0012] <Optical fiber carrying tube> The optical fiber carrying tube 11 is a long cylindrical tube having one or more optical fibers inside the cylindrical wall. The cylindrical wall of the optical fiber carrying tube 11 is preferably a cured product of a resin composition (hereinafter also referred to as a resin layer). The resin composition contains a resin, and may further contain optional components such as additives as necessary. The cylindrical wall may consist of one resin layer, or may be a laminate of two or more resin layers. Each resin layer may contain one type of resin, or two or more types of resin. Examples of resins include polyolefin resins such as polyethylene, polypropylene, polybutene, ethylene-vinyl acetate copolymer, and ethylene-α-olefin copolymer. Examples of polyethylene include low-density polyethylene (LDPE, density: 910 kg / m 3 More than 930kg / m 3 less than 930 kg / m), medium density polyethylene (MDPE, density: 930 kg / m 3 More than 942kg / m 3 less than 942 kg / m 3 (The above are some examples.)

[0013] The outer diameter of the optical fiber carrying tube 11 is not particularly limited, but is preferably, for example, 20 mm to 50 mm, and more preferably 30 mm to 40 mm, in order to easily obtain good accuracy in measurements using the optical fiber carrying tube 11. The thickness of the tube wall is preferably, for example, 2.5 mm to 10 mm, and more preferably 3 mm to 5 mm. The length of the optical fiber carrying tube 11 wound around the bobbin 21 can be set to a length that does not cause these inconveniences: if it is too short, one optical fiber carrying tube will not be able to cover the desired measurement range, making it difficult to connect the optical fiber carrying tubes, and if it is too long, it will be heavy and will swell, making it difficult to transport and handle. For example, it may be 4 m to 1000 m, and preferably 10 m to 100 m.

[0014] <Bobbin> The bobbin 21 has a cylindrical body 22, flanges 23 at both ends of the body 22, and a rotating shaft 24 that penetrates the body 22. The body 22 and the rotating shaft 24 rotate integrally around an axis Q. The optical fiber carrying tube 11 is wound around the circumferential surface of the body 22 to form a wound body 12. In the figure, the symbol 11a indicates the end of the optical fiber carrying tube 11. If the diameter of the body 22 is too small, the optical fiber is likely to break due to stress, but if it is too large, it is difficult to transport and handle, so the diameter can be set to a size that does not cause these inconveniences. For example, it may be 0.5 m to 5 m, and preferably 1 m to 3 m. The thickness of the trunk 22 in the direction of the axis Q (direction X) can be set to a size that does not cause these inconveniences, since if it is too small, the winding work of the optical fiber carrying tube 11 becomes difficult, and if it is too large, the transportation and handling becomes difficult. For example, it may be 20 m to 1000 m, and preferably 30 m to 500 m.

[0015] The flange 23 is plate-shaped. In this embodiment, the planar shape of the flange 23 when viewed from the direction of the axis Q is circular, but is not limited to this. For example, it may be polygonal. The diameter of the flange 23 (the diameter of the circumscribing circle in the case of a polygon) can be set to a size that does not cause these inconveniences: if it is too small, the winding work of the optical fiber carrying tube 11 becomes difficult, and if it is too large, the transportation and handling becomes difficult. For example, it may be 0.8 to 6 m, and preferably 1.5 to 4 m. The difference between the diameter of the trunk portion 22 and the diameter of the flange portion 23 can be set to a value that does not cause these inconveniences, since if it is too small, the winding work of the optical fiber carrying tube 11 becomes difficult, and if it is too large, the transportation and handling becomes difficult. For example, it may be 0.01 m to 1.0 m, and preferably 0.04 m to 0.7 m. The thickness t of the flange 23 in the direction of the axis Q (direction X) can be set to a value that avoids problems such as bending and failure to maintain its shape if it is too thin, and increasing the weight and making it difficult to transport and handle if it is too thick. For example, it may be 1.0 mm to 10.0 mm, and preferably 2.0 mm to 8.0 mm.

[0016] The rotating shaft 24 is rod-shaped. In this embodiment, the shape of the rotating shaft 24 when viewed from the direction of the axis Q is circular, but is not limited to this. For example, it may be polygonal. The diameter of the rotating shaft 24 (the diameter of the circumscribed circle in the case of a polygon) can be set to a size that does not cause these problems: if it is too small, the contact area between the lower box 32 and the rotating shaft 24 will be small, causing stress concentration and risk of deformation or breakage, and if it is too large, resistance will increase, making unwinding workability difficult. For example, it may be 50 mm to 1000 mm, and preferably 200 mm to 500 mm.

[0017] Examples of materials for the body 22, flange 23, and rotating shaft 24 include paper, olefin resin, and metal. In terms of water resistance and strength, olefin resin may be used, and polyethylene or polypropylene is preferred. There is no particular limitation on the manufacturing method of the bobbin 21. The body portion 22, the flange portion 23, and the rotating shaft 24 may be integrally molded. The rotating shaft 24 may be inserted into an integrally molded product of the body portion 22 and the flange portion 23. The body portion 22 and the flange portion 23 may be molded separately and then integrated.

[0018] <Box body> The box body 31 has a lower box 32 and an upper box 33. The lower box 32 is open at the top, and the upper box 33 is open at the bottom. The upper box 33 is a detachable cover that closes the opening 32a of the lower box 32. Box body 31 is a rectangular parallelepiped. Lower box 32 has a rectangular bottom surface 32b and four side surfaces. Upper box 33 has a rectangular top surface 33b and four side surfaces. Lower box 32 houses the lower part including rotation shaft 24 of bobbin 21, and upper box 33 houses the upper part including rotation shaft 24 of bobbin 21. When upper box 33 is placed over lower box 32, there is an overlapping area (overlapping portion) 35 where the upper part of lower box 32 and the lower part of upper box 33 overlap.

[0019] A bearing 34 that rotatably holds the rotation shaft 24 of the bobbin 21 is provided on a side surface 32c of the lower box 32 that is perpendicular to the X direction. For example, as shown in FIG. 2, a U-shaped notch extending in the Y direction can be provided in the center of the upper end (opening 32a) of the side surface 32c, and the bottom of the notch can serve as the bearing 34. The distance from the bottom surface 32b of the lower box 32 to the bearing 34 (bottom of the notch) is set so that the lower end of the bobbin 21 does not come into contact with the bottom surface 32b when the rotation shaft 24 of the bobbin 21 is held by the bearing 34. For example, the distance y1 between the lower end of the bobbin 21 and the bottom surface 32b in the Y direction is preferably 5 mm to 200 mm, and more preferably 10 mm to 100 mm. Furthermore, with the rotating shaft 24 of the bobbin 21 held by the bearing portion 34, the distance y2 from the upper end of the rotating shaft 24 to the opening 32a of the lower box 32 is preferably, for example, 5 mm to 400 mm, and more preferably 50 mm to 100 mm.

[0020] The distance from the top surface 33b of the upper box 33 to the opening 33a is not constant, and the opening 33a is made up of a first opening 331 with a large overlapping portion 35, a second opening 332 with a small overlapping portion 35, and a notch 333 located between them. The notch 333 is concave-shaped with its depth direction in the Y direction, and comes into contact with the upper end of the rotating shaft 24 when the rotating shaft 24 of the bobbin 21 is held in the bearing portion 34. The distance from the top surface 33b of the upper box 33 to the notch 333 (the bottom of the notch) is set so that the upper end of the bobbin 21 does not come into contact with the top surface 33b when the rotating shaft 24 is held in the bearing portion 34. For example, the distance y3 between the upper end of the bobbin 21 and the top surface 33b in the Y direction is preferably 5 mm to 200 mm, and more preferably 10 mm to 100 mm. Furthermore, when the rotating shaft 24 of the bobbin 21 is held in the bearing portion 34, the distance y4 from the upper end of the rotating shaft 24 to the second opening 332 of the upper box 33 is preferably 5 mm to 400 mm, and more preferably 50 mm to 100 mm. The distance y5 from the upper end of the rotating shaft 24 to the first opening 331 of the upper box 33 is preferably 5 mm to 800 mm, and more preferably 50 mm to 300 mm.

[0021] The size of the box body 31 in the Z direction is set so that the bobbin 21 does not come into contact with the side surface 32d perpendicular to the Z direction of the lower box 32 when the rotation shaft 24 of the bobbin 21 is held by the bearing portion 34. For example, the distance z1 in the Z direction between the end of the bobbin 21 and the side surface 32d is preferably 5 mm to 200 mm, and more preferably 10 mm to 100 mm.

[0022] The ratio of the thickness in the X direction to the dimensions in the Y and Z directions of the box 31 is small. For example, the height in the Y direction and the width in the Z direction may be 6 to 35 times, and preferably 7 to 25 times, the thickness in the X direction of the box 31.

[0023] If the bobbin 21 were rotatable while the rotation axis 24 of the bobbin 21 was held by the bearing portion 34, the bobbin 21 would rotate with the heavier part of the wound body 12 facing downward, making it impossible to adjust the position of the end 11a of the optical fiber carrying tube 11. In order to prevent the bobbin 21 from rotating, it is preferable to provide a friction material 36 that presses the bobbin 21 in a direction parallel to the axis Q direction (X direction). For example, as shown in FIG. 1 , the rotary shaft 24 is inserted through an annular friction material 36, and the friction material 36 is interposed at a position sandwiched between the inner surface of the lower box 32 and the bobbin 21. The friction material 36 contacts the lower box 32 and the bobbin 21 and presses them in the X direction, allowing the bobbin 21 to rotate while applying frictional force to prevent the bobbin 21 from rotating. The friction material 36 can be made of an elastic material such as a resin foam or rubber. By making the thickness of the friction material 36 in the X direction slightly larger than the size of the gap between the inner surface of the lower box 32 and the bobbin 21, it is possible to press them in the X direction and effectively apply frictional force.

[0024] As shown in FIG. 3, the upper box 33 has an opening mechanism that allows a side surface 33d of the rotating shaft 24 that is parallel to the axis Q to be opened. In this embodiment, the side surface 33d has an easy-open portion 41 extending in a direction (Y direction) perpendicular to the axis Q direction. As shown in FIG. 3(a), the easy-open portion 41 has a strip-shaped weakened portion 41a and an opening string 41b attached vertically inside the weakened portion 41a. The end of the opening string 41b is exposed to the outside at the lower end of the side surface 33d. The weakened portion 41a can be formed, for example, by making a slit in the Y direction at any position on the side surface 33d, aligning the slit and fixing it with tape. 3(b) and (c), by pulling the tear string 41b outward, a tear is formed in the weakened portion 41a, and the side surface 33d is opened, thereby making it possible to unwind the optical fiber carrying tube 11 from the package 1. 3(d), the upper box 33 may be removed to expose the top of the bobbin 21. Because the second opening 332 with a small overlapping portion 35 is formed between the open side surface 33d and the rotation shaft 24, the upper box 33 can be easily removed by lifting it up and sliding it in the Z direction.

[0025] Examples of materials for the lower box 32 and the upper box 33 include cardboard and metal. The cardboard may be paper cardboard or resin cardboard. Resin cardboard is preferred from the viewpoints of water resistance and strength. The material for the resin cardboard may be an olefin resin, and polyethylene or polypropylene is preferred. The thickness of the cardboard can be set to a value that avoids these inconveniences: if it is too thin, it will bend and unable to maintain its shape, and if it is too thick, it will be heavy and difficult to transport and handle. For example, it may be 1.0 mm to 10.0 mm, and preferably 2.0 mm to 8.0 mm.

[0026] <How to use> A wound body 12 is prepared by winding an optical fiber carrying tube 11 of a desired length around a bobbin 21, and is housed in a lower box 32. At this time, the bearing portion 34 rotatably holds the rotating shaft 24 of the bobbin 21. Next, the upper box 33 is placed over the opening 32a of the lower box 32 to complete the package 1. At this time, the bottom of the notch portion 333 abuts against the upper end of the rotating shaft 24. When the wound body 12 is housed in the lower box 32, or after it is housed in the lower box 32 and before the upper box 33 is placed over it, the unwinding tip of the optical fiber carrying tube 11 is adjusted to a desired position. When using the optical fiber carrying tube 11, the package 1 is opened and the optical fiber carrying tube 11 is unwound. When unpacking the package 1, the side surface 33d parallel to the axis Q direction of the upper box 33 may be opened to allow the optical fiber carrying tube 11 to be unwound, or the upper box 33 may be removed to allow the optical fiber carrying tube 11 to be unwound.

[0027] According to this embodiment, the box body 31 that rotatably houses the wound body 12 is divided into a lower box 32 and an upper box 33, and the upper box 33 can be removed, so that the package 1 can be easily opened and the optical fiber carrying tube 11 can be unwound. For example, as shown in Fig. 4, the optical fiber carrying tube 11 wound around the bobbin 21 can be pulled out in a downward direction (D1), a sideways direction (D2), or an upward direction (D3) as needed.

[0028] Furthermore, since the optical fiber carrying tube 11 requires a large winding diameter, workability is impaired if the unwinding tip of the optical fiber carrying tube 11 is located below the bobbin inside the package 1. According to this embodiment, by providing the friction material 36, the unwinding tip of the optical fiber carrying tube 11 can be adjusted to a desired position.

[0029] <Modification> As shown in Fig. 5, the bobbin 21 of this example has a fixing member 51 that fixes the optical fiber carrying tube 11 in contact with the inner surface of the flange portion 23. As shown in Fig. 5(a), it is preferable that two fixing members 51 fix the tip end of the optical fiber carrying tube 11 at the start of winding and the tip end of the winding (unwinding tip), respectively. The positions at which the two fixing members 51 are provided are not particularly limited. For example, the two fixing members 51 may be spaced apart evenly in the circumferential direction of the flange portion 23, or may be offset to one side as shown in Fig. 5(a). An offset to one side is preferable because it allows the winding of the optical fiber carrying tube 11 to be aligned. The fixing member 51 is not particularly limited as long as it can hold the optical fiber carrying tube 11 in contact with the inner surface of the flange 23. For example, as shown in Fig. 5(b), a leaf spring that biases the optical fiber carrying tube 11 in a direction pressing it against the flange 23 can be used.

[0030] According to this example, the unwinding work becomes easier by fixing the tip end (unwinding tip) of the optical fiber carrying tube 11 with the fixing member 51. Furthermore, fixing the tip end at the start of winding can prevent the tube from collapsing during unwinding.

[0031] <Other variations> As shown in Fig. 6, the lower box 32 of this example has one or more handle holes 52 on a side surface 32c perpendicular to the axis Q. The shape of the handle holes 52 is preferably a rectangle or an elongated hole whose longitudinal direction faces upward from the outside to the inside. The acute angle θ formed between the longitudinal direction of the handle hole 52 and the Z direction is preferably 5° to 80°, for example, and more preferably 15° to 60°. In the Y direction, the distance y52 from the bottom surface 32b of the lower box 32 to the upper end of the handle hole 52 is preferably 300 mm to 1500 mm, for example, and more preferably 500 mm to 1200 mm. According to this example, the presence of the handle holes 52 makes it easy to lift and carry the package 1.

[0032] <Other variations> As shown in Fig. 7, a locking hole 53 for locking an anti-tip member may be provided on a side surface 32c of the lower box 32 that is perpendicular to the axis Q. The locking hole 53 is preferably provided in an area where no bobbin 21 is present when the box 1 is viewed in plan from the X direction. For example, the locking hole 53 is preferably provided near a lower corner of the lower box 32. In the Y direction, the distance y53 from the bottom surface 32b to the lower end of the locking hole 53 is preferably 100 mm to 1300 mm, for example, and more preferably 300 mm to 1000 mm. The tip-prevention material can be, for example, a connecting cord 54 and a support 55. Locking holes 53 are provided in each of the lower corners of the lower box 32, and both ends of the connecting cord 54 are locked into the locking holes 53. By hanging the connecting cord 54 connecting the lower corners of the lower box 32 on, for example, a support 55 fixed to the ground, the package 1 can be prevented from tipping over.

[0033] Since the ratio of the thickness in the X direction to the dimensions in the Y and Z directions of the packaging body 1 is small, when the bottom surface 32b is placed facing downwards, the packaging body 1 is likely to tip over in a direction where the side surface 32c faces downwards. However, according to this example, the packaging body 1 can be prevented from tipping over by engaging the anti-tip material with the engaging hole 53.

[0034] <Supporting member> The support member 61 of this embodiment is a plate-like member that supports the optical fiber carrying tube package 1. As shown in Figure 8, the support member 61 has multiple V-shaped grooves on its upper surface. The V-shaped grooves are continuous in the groove width direction. One wall surface of the V-shaped groove is a bottom contact surface 61a that contacts the bottom surface 32b of the packaging body 1. It is preferable that the width W of the bottom contact surface 61a is the same as the thickness (dimension in the X direction) of the bottom surface 32b of the packaging body 1. The other wall surface of the V-shaped groove is a side contact surface 61b that contacts the side surface 32c of the packaging body 1. When the support member 61 is placed on a horizontal surface, the acute angle A formed between the bottom contact surface 61a and the horizontal plane can be set appropriately within a range of more than 0° and not more than 45°. In order to further expand the upper limit of the Y direction of the box body 31, the angle is preferably 9° or more, and more preferably 15° or more. In terms of loading efficiency, the angle is preferably 40° or less, and more preferably 20° or less.

[0035] The distance (height) H from the bottom surface of the support member 61 to the highest point of the V-shaped groove can be set to a distance that does not cause inconveniences, such as poor load stability if it is too small, or narrowing the upper limit of the Y direction of the box body 31 if it is too large. For example, it may be 10 mm to 300 mm, and preferably 50 mm to 200 mm. Examples of materials for the support member 61 include paper, olefin resin, urethane resin, styrene resin, phenol resin, polyimide resin, and silicone resin.

[0036] The support member 61 for the optical fiber carrying tube package of this embodiment can hold the package 1 in an angled position. Therefore, by using the support member 61, the package 1 can be stably stored even in a space that is lower in height in the Y direction than the package 1. Furthermore, the support member 61 of this embodiment can support multiple optical fiber carrying tube packages 1 collectively. [Explanation of symbols]

[0037] 1 package 11 Optical fiber support tube 11a End 12 Winding body 21 Bobbin 22 Torso 23 Tsuba 24 Rotation Axis 31 Box body 32 Lower box 32a opening 32b Bottom 32c side 32d side 33 Upper box 33a opening 33b Top 33d Side 34 Bearing section 35 Overlap 36 Friction material 41 Easy opening part 41a Weakened part 41b Opening string 51 Fixing member 52 Handle hole 53 Locking hole 54 Connecting cord 55 Post 61 Support member 61a Bottom contact surface 61b Side contact surface 331 First Opening 332 Second Opening 333 Notch

Claims

1. an optical fiber carrying tube having a long cylindrical shape and having one or more optical fibers in a cylindrical wall; a bobbin having a cylindrical body, flanges at both ends of the body, and a rotation shaft passing through the body, and the optical fiber carrying tube is wound around the bobbin; a box body that accommodates the wound body, The box body includes a lower box having an open top and an upper box that detachably closes the opening of the lower box, The optical fiber carrying tube package, wherein the lower box has a bearing portion that rotatably holds the rotation shaft.

2. 2. The optical fiber carrier tube package according to claim 1, wherein the upper box has an openable side surface parallel to the axial direction of the rotating shaft.

3. 3. The optical fiber carrier tube package according to claim 2, wherein the openable side surface has an easy-to-open portion extending in a direction perpendicular to the axial direction of the rotation shaft.

4. 2. The optical fiber carrier tube package according to claim 1, wherein a friction material is present in the lower box to press the bobbin in a direction parallel to the axial direction of the rotation shaft.

5. 2. The optical fiber carrier tube package according to claim 1, wherein the bobbin has a fixing member that fixes the optical fiber carrier tube in contact with an inner surface of the flange portion of the bobbin.

6. 2. The optical fiber carrier tube package according to claim 1, wherein the lower box has one or more handle holes on a side surface perpendicular to the axial direction of the rotation shaft.

7. 2. The optical fiber carrier tube package according to claim 1, wherein said lower box has a locking hole on a side surface perpendicular to the axial direction of said rotation shaft for locking an anti-tip member.

8. 2. The optical fiber carrying tube package according to claim 1, wherein the lower box and the upper box are made of corrugated cardboard made of resin.

9. A plate-shaped support member for supporting the optical fiber carrying tube package according to any one of claims 1 to 8, A support member for an optical fiber carrying tube package, having a plurality of V-shaped grooves on the upper surface arranged continuously in the groove width direction, one wall surface of the V-shaped groove abutting the bottom surface of the optical fiber carrying tube package, and the other wall surface abutting the side surface of the optical fiber carrying tube package.

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