JPH0542261U - Cable laminated winding structure - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the shrinkage of the interlayer film, and to prevent the winding disorder or collapse of the cable due to the shrinkage. [Structure] When the cable 2 is wound around the winding shaft 1 in layers,
A plurality of interlayer films 3 were wound in the width direction of the winding shaft 1 so that the width direction end portions 4 and 5 thereof were adjacent to each other. When the width of the winding shaft 1 is W, the outer diameter of the cable 2 is D, and the shrinkage amount in the width W direction of the interlayer film 3 during storage after the cables 2 are laminated and wound is L. The number N of interlayer films 3 was set to {(L / D) +1} or more.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a winding structure for laminating a long cable such as an optical submarine wire unit around a drum or a bobbin.

[0002]

[Prior Art]

 As shown in FIG. 3, when a long cable 2 such as an optical submarine wire unit is laminated and wound on a winding shaft 1 such as a drum or a bobbin, the number of windings is large and the number of winding layers is large. In this case, if there is a gap 6 between the cables 2 of the lower cable layer, the cable 2 of the upper cable layer falls into the gap 6 and the winding of the cable 2 collapses. .. In order to prevent this, conventionally, when the cable 2 is wound, an interlayer film 3 made of paper is interposed between the upper and lower layers.

[0003]

[Problems to be solved by the device]

 The conventional paper-made interlayer film 3 usually has a property of expanding when moisture absorption is large and contracting when moisture absorption is small. For this reason, there is a case where the drum or the bobbin contracts in the axial direction of the winding shaft 1 due to changes in the outside air temperature and the amount of moisture absorption. Therefore, when the interlayer film 3 having a large moisture absorption amount is used, when the interlayer film 3 contracts in the axial direction of the winding shaft 1, the cable 2 wound thereon is dragged in the same direction. And the winding of the cable 2 may be disturbed. In a remarkable case, as shown in FIG. 4, a gap 8 larger than the outer diameter of the cable 2 is generated between the cable 2 and the flange 7 of the drum or bobbin, and the cable 8 is provided in the gap 8. 2 may fall and the cable 2 may collapse.

In order to solve the above-mentioned problems, the applicant of the present invention previously developed a new cable laminated winding structure and filed a utility model registration application (Japanese Patent Application No. 3-27261). When the cable 2 is laminated and wound around the winding shaft 1 such as a drum or a bobbin, the winding film of the winding shaft 1 is used as an interlayer film 3 interposed between the lower cable layer and the upper cable layer. It uses a film with a small shrinkage in the width direction. According to this, since the shrinkage amount of the interlayer film 3 is small, a gap is unlikely to be generated, and the collapse of the cable 2 is prevented.

[0005]

[Problems to be solved by the device]

 In this case, as shown in FIGS. 3 and 4, two or more interlayer films 3 are wound in the width direction of the winding shaft 1, and the width direction end portions 4 and 5 of the adjacent interlayer films 3 are overlapped to form an interlayer film. Although it may be possible to make the gap less likely to occur due to the shrinkage of the film 3, this causes a step in the overlapped portion, and in the case of winding a small optical fiber with a diameter of several hundreds of μm, the light is not generated at the step. There is a problem that the fiber is likely to be disordered in winding, and the more the number of winding layers is, the more likely it is to collapse.

An object of the present invention is to reduce the gap generated by shrinkage of the interlayer film 3 without overlapping the interlayer film 3 and prevent the cable from being disturbed or collapsed. Is to realize.

[0007]

[Means for Solving the Problems]

 In the cable laminated winding structure of claim 1 of the present invention, as shown in FIG. 1, a cable 2 is laminated and wound around a winding shaft 1 such as a drum or bobbin, and a lower cable layer and an upper cable layer are provided. In a cable laminated winding structure in which an inter-layer film 3 is interposed between a cable layer and a plurality of inter-layer films 3, a plurality of inter-layer films 3 are wound in such a manner that their width direction end portions 4 and 5 contact or approach each other. 1 is wound in the width direction.

The cable laminated winding structure according to claim 2 of the present invention is a cable in which the width of the winding shaft 1 is W and the outer diameter of the cable 2 is D as shown in FIG. When the shrinkage amount of the interlaminar film 3 in the width W direction during storage of No. 2 is L, the number N of the interlaminar films 3 interposed in each layer is {(L / D) +1} or more. is there.

[0009]

[Action]

 In the present invention, since a plurality of interlayer films 3 are wound in the width direction of the winding shaft 1, even though the respective shrinkage rates of the interlayer films 3 are the same, the shrinkage amount of each interlayer film 3 is smaller than that of the wide interlayer film 3. Become. For this reason, the gap generated by the shrinkage of each interlayer film 3 becomes narrow, and the cable 2 wound on it becomes difficult to collapse. Moreover, since the plurality of interlayer films 3 are wound in the width direction of the winding shaft 1 so as to contact or approach each other without overlapping the width direction end portions 4 and 5, the interlayer film 3 is overlapped. There is no winding disorder or collapse due to the step generated when winding.

In the present invention, the number N of the interlayer films 3 is {(L / D) +1} when the width of the winding shaft 1 is W and the shrinkage amount of the interlayer film 3 in the entire width direction is L. As described above, the shrinkage amount L of the interlayer film 3 in the entire width direction of the winding shaft 1 is divided into each interlayer film 3 and becomes L ÷ {(L / D) +1}. This is {L / (L + 1)} D, which is smaller than the outer diameter D of the cable 2, and a wide gap such that the cable 2 drops due to shrinkage of each interlayer film 3 does not occur.

[0011]

【Example】

 In FIG. 1 showing an embodiment of the present invention, 1 is a winding shaft of a drum or bobbin, 2 is a cable of an optical submarine unit or the like wound on the same winding shaft 1, and 3 is an upper or lower cable. It is an interlayer film interposed between the layers.

As the interlayer film 3, it is desirable to use a film having a minimum shrinkage amount. Therefore, avoiding the use of paper that shrinks when dried as the interlayer film 3 or a resin that expands with heat, a metal film such as an aluminum foil that does not shrink easily when dried and does not expand with heat, a metal film and a plastic. It is preferable to use a laminated film with a film. In this case, if the material of the plastic film is the same as that of the plastic sheet material of the cable 2, they may stick to each other, and therefore different materials are preferable. When using paper, it is desirable to use paper that has been dried in advance and sufficiently shrunk.

When the interlayer films 3 are wound, the widthwise ends 4 and 5 of the adjacent interlayer films 3 are brought into contact with or approach each other without being overlapped. When the cables 2 are brought close to each other without making contact with each other, the distance between them should be narrow so that the cable 2 does not fall.

When an optical submarine cable unit having an outer diameter D of 4.0 mmφ and a length of 7500 m is wound around a drum having a body width W1 of 100 mmφ and the temperature and humidity are controlled during the production and storage, the humidity is usually 60 → When changed by 30%, the interlayer film 3 dries and shrinks by 0.5%. In this case, since the body width W is 1100 mm, a gap of 1100 × 0.005 = 5.5 mm occurs when the number of the interlayer films 3 is one, and the gap is large enough for the optical submarine unit to fall.

Therefore, when the inter-layer film 3 is divided into {(5.5 / 4.0) +1} sheets or more, that is, divided into 3 or more sheets according to the present invention, each interlayer film 3 shrinks. The amount is 5.5 / 3 = 1.83 mm, and the 4.0 mmφ optical submarine line unit does not fall into the gap.

[0016]

[Effect of the device]

 The cable laminated winding structure of the present invention has the following effects. ． Since the shrinkage amount of the inter-layer film 3 caused by the drying is dispersed into the plurality of inter-layer films 3, a wide gap in which the cable 2 falls does not occur. ． Since the plurality of interlayer films 3 are interposed between the layers so that the width direction end portions 4 and 5 thereof are adjacent to each other, winding disorder or collapse due to the overlapping of the interlayer films 3 does not occur. ． In relation to the width W of the winding shaft 1, the outer diameter D of the cable 2, and the shrinkage amount L of the interlayer film 3 in the width W direction during storage of the laminated and wound cable 2, the layers are interposed between the layers. Since the number N of the interlayer films 3 is set to {(L / D) +1} or more, the shrinkage of each interlayer film 3 is particularly reduced, and the cave 2 is less likely to be collapsed.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a cable laminated winding structure of the present invention.

FIG. 2 is a detailed explanatory view when the interlayer film shrinks in the cable laminated winding structure of FIG.

FIG. 3 is a cross-sectional view of a conventional cable laminated winding structure.

FIG. 4 is an explanatory view when the interlayer film shrinks in the cable laminated winding structure of FIG.

[Explanation of symbols]

 1 winding shaft 2 cables 3 interlayer film 4, 5 widthwise end W width of the winding shaft L shrinkage of the interlayer film in the width direction of the winding shaft N number of interlayer films

Claims (2)

[Scope of utility model registration request] 1. A cable 2 attached to a winding shaft 1 such as a drum or a bobbin.
In a cable laminated winding structure in which the interlayer film 3 is interposed between the lower cable layer and the upper cable layer, and a plurality of interlayer films 3 are provided at the ends in the width direction. A cable laminated winding structure in which the portions 4 and 5 are wound in the width direction of the winding shaft 1 so as to contact or approach each other. 2. The width of the winding shaft 1 is W, the outer diameter of the cable 2 is D, and the shrinkage amount of the interlayer film 3 in the width W direction during storage of the laminated and wound cable 2 is L. In this case, the number N of the interlayer films 3 to be interposed in each layer is {(L / D) +
1} or more sheets, and a cable laminated winding structure.