Optical branching cable set

Abstract

To provide an optical branching cable set that achieves both protection of branching cord portions and easy production.SOLUTION: An optical branching cable set comprises a plurality of optical branching cables and a branching cord bag. At least two of the optical branching cables each comprise a main cable and branching cord portions. The main cable includes a plurality of optical cords each containing at least one optical fiber core, a tension member, and a tape forming the outermost layer. The branching cord portion contains at least one optical fiber core that is drawn out from an optical cord of the main cable to a position outside the outermost layer. The branching cord bag is capable of collectively accommodating the plurality of branching cord portions provided in the plurality of optical branching cables.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to an optical branch cable set. [Background technology]

[0002] Patent Document 1 discloses an optical branching cable that connects a server rack group having multiple server racks to a distribution board. The optical branching cable includes a main cable and branch cords that branch off from the main cable and are connected to each server rack. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-083096 Summary of the Invention [Problem to be solved by the invention]

[0004] The layout of server racks in a cluster varies depending on the intended use. For this reason, optical branching cables are manufactured so that the locations of the branching cords, where the main cable branches off, correspond to the layout of each server rack. While the branching cords must be adequately protected during installation, it is also important that the optical branching cable be easy to manufacture.

[0005] An object of the present disclosure is to provide an optical branch cable set that achieves both protection of a branch cord portion and ease of manufacture. [Means for solving the problem]

[0006] An optical branching cable set according to one embodiment of the present disclosure comprises a plurality of optical branching cables and a branching cord bag, wherein at least two of the optical branching cables each comprise a main cable having a plurality of optical cords each having at least one optical fiber core, a tensile strength member, and a tape forming the outermost layer, and a branching cord section including at least one optical fiber core led out from the optical cords of the main cable outside the outermost layer, and the branching cord bag is capable of collectively accommodating a plurality of branching cord sections comprised by a plurality of the optical branching cables. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide an optical branch cable set that achieves both protection of the branch cord portion and ease of manufacturing. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 illustrates an optical communication system according to this embodiment. [Figure 2] FIG. 2 is a schematic diagram of an optical branch cable. [Figure 3] FIG. 3 is a cross-sectional view of the main cable. [Figure 4] FIG. 4 is a schematic diagram of the optical branch cable set according to the first embodiment. [Figure 5] FIG. 5 illustrates a curved optical branch cable and a branch cord bag. [Figure 6] FIG. 6 is a cross-sectional view taken along a plane perpendicular to the axis of the main cable of the optical branch cable set. [Figure 7] FIG. 7 illustrates a first stage branching cord bag. [Figure 8] FIG. 8 illustrates a branching code bag in the second stage. [Figure 9] FIG. 9 illustrates a branching code bag in the third stage. [Figure 10] FIG. 10 is a perspective view of an optical branch cable set according to the third embodiment. [Figure 11]FIG. 11 illustrates an optical branching cable set and a branching cord bag according to the third embodiment. [Figure 12] FIG. 12 illustrates an example of the arrangement of the branch cord portions of each optical branch cable. DETAILED DESCRIPTION OF THE INVENTION

[0009] (Description of Embodiments of the Present Disclosure) First, embodiments of the present disclosure will be described below. (1) An optical branch cable set according to one aspect of the present disclosure includes a plurality of optical branch cables and a branch cord bag, at least two of the optical branch cables each including at least one optical fiber core, a main cable having a plurality of optical cords, a tension member, and a tape forming an outermost layer, and a branch cord portion including at least one optical fiber core led out from the optical cords of the main cable to an outer side than the outermost layer, and the branch cord bag can collectively accommodate the plurality of branch cord portions included in the plurality of optical branch cables.

[0010] According to the optical branch cable set, the branch cord bag can accommodate the branch cord portions of the multiple optical branch cables all together, so the multiple branch cord portions are protected with fewer branch cord bags than the optical branch cables. This reduces the number of parts, making it possible to provide an optical branch cable set that is easy to manufacture and that protects the branch cord portions.

[0011] (2) In the optical branch cable set according to (1) above, the branch cord bag may be made of a material having shock-absorbing properties.

[0012] According to the optical branch cable set described above, the branch cord bag is made of a material having shock-absorbing properties, so that the branch cord portion is more effectively protected.

[0013] (3) In the optical branch cable set according to (1) or (2) above, the branch cord bag may be fixed to the plurality of optical branch cables at two different locations along the main cable.

[0014] According to the above optical branching cable set, the branching cord bag is fixed to the multiple optical branching cables at two different locations along the main cable, which makes it easy to manufacture the optical branching cable set and enables the branching cord bag to be firmly fixed to the optical branching cables.

[0015] (4) In the optical branching cable set according to any one of (1) to (3) above, the branching cord bag includes a base portion that is arranged to be sandwiched between the main cable and the branching cord portion when the branching cord portion is housed in the branching cord bag, and a top surface portion that is positioned to cover the upper part of the branching cord portion, and the base portion is formed so as not to cover the branching portion from which the branching cord portion is derived from the main cable, and the top surface portion is formed to have a dimension that is larger along the axis of the main cable than the base portion so as to be able to cover the branching portion.

[0016] According to the optical branch cable set, the base is formed so as not to cover the branch portion, which makes it easy to store the branch cord portion led out from the branch portion. The top surface is formed larger than the base so as to be able to cover the branch portion, which makes it possible to protect the branch cord portion including the branch portion.

[0017] (5) In the optical branching cable set according to any one of (1) to (4) above, the branching cord bag may have an inner bag that can be accommodated inside the branching cord bag, and the inner bag may be capable of accommodating the branching cord portion of at least a portion of the optical branching cable.

[0018] According to the above-described optical branch cable set, the inner bag can be housed inside the branch cord bag and can house the branch cord portion, so that the branch cord portion is more effectively protected.

[0019] (6) In the optical branch cable set according to any one of (1) to (5) above, the outer surface of the branch cord bag may be formed with an extra length that extends in accordance with the curvature of the optical branch cable.

[0020] Optical branching cables can be curved when they are wound around a drum during manufacturing, etc. With the optical branching cable set described above, an excess length is formed that extends along the curve of the branching cable, and the sufficient excess length makes it difficult for the branching cord bag to fall off the optical branching cable.

[0021] (Details of the embodiments of the present disclosure) Specific examples of optical branching cables and optical branching cable sets according to embodiments of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0022] In the accompanying drawings, arrow F indicates the forward direction of the illustrated structure. Arrow B indicates the rearward direction of the illustrated structure. Arrow U indicates the upward direction of the illustrated structure. Arrow D indicates the downward direction of the illustrated structure. Arrow R indicates the rightward direction of the illustrated structure. Arrow L indicates the leftward direction of the illustrated structure. These directional expressions are used for convenience of explanation and do not limit the posture or direction of the illustrated structure in actual use.

[0023] (optical branching cable) FIG. 1 illustrates an optical communication system 1000 according to this embodiment. As illustrated in FIG. 1, the optical communication system 1000 includes a distribution board 1100 and a plurality of server racks 1200. The distribution board 1100 is configured to collect and connect optical branching cables 1 used in the optical communication system 1000. The optical branching cables 1 are an example of optical cables. The server racks 1200 house physical servers therein. Optical fibers branched from the optical branching cables 1 are connected to each of the server racks 1200. The optical branching cables 1 are laid in a cable laying tray T and routed to the distribution board 1100 and the server racks 1200. The cable laying tray T is an example of a towing path.

[0024] Fig. 2 is a schematic diagram of the optical branch cable 1. As illustrated in Fig. 2, the optical branch cable 1 includes a main cable 10, a branch cord portion 20, a bend restricting member 40, a tip bag 50, and a connection loop 60.

[0025] 3 is a cross-sectional view of the main cable 10. The main cable 10 includes a plurality of optical cords 11, a strength member 12, and a tape 13. The optical cords 11, the strength member 12, and the tape 13 are arranged along the longitudinal direction of the main cable 10. The main cable 10 is also an example of an optical cable.

[0026] Each of the optical cords 11 includes at least one optical fiber 11A therein. In this embodiment, the optical cord 11 includes 24 optical fiber 11A therein. The optical cords 11 are bundled together in a first bundle 14 to form an optical cord group 15.

[0027] The tension members 12 are formed of fiber reinforced plastic (FRP), such as aramid FRP, glass FRP, or carbon FRP. The tension members 12 are configured to share the tension when the optical branch cable 1 is pulled, so that excessive tension is not applied to the optical fiber core 11A. The optical cord group 15 and the tension members 12 are bound together by a second bundle 16 to form a core portion 17.

[0028] The tape 13 forms the outermost layer of the main cable 10. The tape 13 is wound longitudinally around the core 17 to maintain a shape that covers the core 17. The tape 13 is a sheet-like insulating resin, and may be made of, for example, polyester.

[0029] The tape 13 is wound longitudinally so as to form a gap between the tape 13 and the core portion 17. Therefore, the outer diameter of the main cable 10 can be contracted by an external force.

[0030] Returning to Fig. 2, the branch cord section 20 is a cord in which at least one optical fiber 11A is led out from the optical cord 11 of the main cable 10 to the outside of the tape 13, which is the outermost layer. An optical connector 21 is provided at the tip of the branch cord section 20. The branch cord section 20 may be one in which the optical fiber 11A in the optical cord 11 is led out beyond the outermost layer of the main cable 10, or one in which the optical cord 11 itself is led out beyond the outermost layer of the main cable 10.

[0031] The bend restricting part 40 is attached to a position corresponding to the branching part BR of the optical branching cable 1. The bend restricting part 40 is provided at the branching part BR so as to prevent the branching cord part 20 extending from the main cable 10 from being bent with a radius of curvature smaller than a predetermined radius of curvature.

[0032] The tip bag 50 is provided to protect the end of the optical cord 11 exposed at the tip of the main cable 10 and the end optical connector provided at the end of the optical cord 11 .

[0033] The connection loop 60 is connected to the exposed tension member 12 at the tip of the optical branch cable 1. The connection loop 60 is a portion that is connected to a traction device such as a winch. The connection loop 60 is formed in a ring shape, and when the connection loop 60 is pulled, tension is applied to the tension member 12, causing the optical branch cable 1 to be displaced.

[0034] (First embodiment) Next, an optical branching cable set 100 according to a first embodiment will be described. Fig. 4 is a schematic diagram of the optical branching cable set 100 according to the first embodiment. As illustrated in Fig. 4, the optical branching cable set 100 includes a plurality of optical branching cables 1 and a branching cord bag 110. The plurality of optical branching cables 1 are arranged side by side in the depth direction of the paper in Fig. 4.

[0035] The branch cord bag 110 can collectively accommodate a plurality of branch cord sections 20 provided in a plurality of optical branch cables 1. In this embodiment, the branch cord section 20 extending from the branch section BR is wound in a coil shape and accommodated in the branch cord bag 110 together with the optical connector 21.

[0036] The branch cord bag 110 may be made of a material with shock-absorbing properties, such as bubble cushioning, fabric, or a resin material whose surface is formed to be temporarily recessed.

[0037] The branch cord bag 110 may be fixed to the optical branch cable 1 at two different locations along the main cable 10. In this embodiment, the branch cord bag 110 is fixed to the main cable 10 by a hook-and-loop fastener. The branch cord bag 110 is provided with a first hook-and-loop fastener 110a and a second hook-and-loop fastener 110b. The first hook-and-loop fastener 110a and the second hook-and-loop fastener 110b form hook surfaces of the hook-and-loop fasteners. The first hook-and-loop fastener 110a is located to the left of the second hook-and-loop fastener 110b.

[0038] The main cable 10 is provided with a third surface fastener 10a and a fourth surface fastener 10b. The third surface fastener 10a and the fourth surface fastener 10b form a loop surface of the surface fastener. The third surface fastener 10a is located to the left of the fourth surface fastener 10b. The third surface fastener 10a and the fourth surface fastener 10b may be formed on the main cable 10 of a plurality of optical branching cables 1 arranged in parallel.

[0039] The first surface fastener 110a can be adhered to the third surface fastener 10a. The second surface fastener 110b can be adhered to the fourth surface fastener 10b. By adhering the first surface fastener 110a and the second surface fastener 110b to the third surface fastener 10a and the fourth surface fastener 10b respectively, the branch cord bag 110 is fixed to the optical branching cable 1 at two different positions along the main cable 10.

[0040] The branch cord bag 110 includes a base portion 111 and a top surface portion 112. The base portion 111 is arranged to be sandwiched between the main cable 10 and the branch cord portion 20 in a state where the branch cord portion 20 is housed in the branch cord bag 110. The top surface portion 112 is positioned to cover the upper portion of the branch cord portion 20 in a state where the branch cord portion 20 is housed in the branch cord bag 110.

[0041] The base portion 111 is formed so as not to cover the branch portion BR from which the branch cord portion 20 is led out from the main cable 10. On the other hand, the top surface portion 112 is formed so as to be able to cover the branch portion BR. When the dimension of the base portion 111 along the main cable 10 is L1 and the dimension of the top surface portion 112 along the main cable 10 is L2, the base portion 111 and the top surface portion 112 are formed such that L1 < L2. That is, the top surface portion 112 is formed to have a dimension larger along the axis of the main cable 10 than the base portion 111.

[0042] The branch cord bag 110 includes an inner bag 113 that can be housed inside the branch cord bag 110. In this embodiment, the branch cord bag 110 includes two inner bags 113.

[0043] The inner bag 113 can accommodate at least a portion of the branch cord portions 20 of the optical branch cable 1. In this embodiment, all of the branch cord portions 20 accommodated in the branch cord bag 110 are accommodated separately in two inner bags 113.

[0044] The inner bag 113 may be made of a material that is slippery relative to the inner surface of the branch cord bag 110. For example, the inner bag 113 may be made of plastic. This makes it easier to put the inner bag 113 into the branch cord bag 110 and take it out.

[0045] The outer surface of the branch cord bag 110 may be formed with an excess length 114 that extends in accordance with the curvature of the optical branch cable 1. In this embodiment, the excess length 114 is formed so as to be folded on the outer surface of the right side of the branch cord bag 110, but as exemplified by the dashed line, the excess length 114 may also be formed on the outer surface of the left side of the branch cord bag 110. Furthermore, the excess length 114 may also be formed on both the outer surface of the left side and the outer surface of the right side of the branch cord bag 110.

[0046] 5 illustrates a curved optical branch cable 1 and a branch cord bag 110. As illustrated in Fig. 5, the optical branch cable 1 may be curved during operations such as manufacturing, transportation, and installation. For example, the optical branch cable 1 may be wound around a drum during manufacturing, and in this case, the optical branch cable set 100 is curved so as to be convex upward, toward the side where the branch cord bag 110 is provided.

[0047] As the optical branching cable 1 is bent, stress is applied to the branching cord bag 110 to stretch it leftward and rightward. In this case, the folded excess length 114 unfolds and extends along the curve of the optical branching cable 1, making it difficult for the branching cord bag 110 to deform excessively and difficult for the branching cord bag 110 to fall off the optical branching cable 1.

[0048] According to the optical branching cable set 100 of this embodiment, the branching cord bag 110 can collectively accommodate the branching cord sections 20 of the multiple optical branching cables 1, and therefore the multiple branching cord sections 20 are protected by a smaller number of branching cord bags 110 than the number of optical branching cables 1. This reduces the number of parts, making it possible to provide an optical branching cable set 100 that protects the branching cord sections 20 while being easy to manufacture.

[0049] Since the optical branching cable set 100 of this embodiment is made of a material with shock-absorbing properties, the branching cord portion 20 is protected more effectively.

[0050] According to the optical branching cable set 100 of this embodiment, the branching cord bag 110 is fixed to multiple optical branching cables 1 at two different locations along the main cable 10, so that the optical branching cable set 100 is easy to manufacture and the branching cord bag 110 can be firmly fixed to the optical branching cables 1.

[0051] According to the optical branch cable set 100 of this embodiment, the base 111 is formed so as not to cover the branch portion BR, which facilitates the operation of storing the branch cord portion 20 extending from the branch portion BR. The top surface 112 is formed larger than the base 111 so as to be able to cover the branch portion BR, which protects the branch cord portion 20, including the branch portion BR.

[0052] According to the optical branching cable set 100 of this embodiment, the inner bag 113 can be housed inside the branching cord bag 110 and can house the branching cord section 20, so that the branching cord section 20 is more effectively protected.

[0053] In this embodiment, all of the branch cord sections 20 housed in the branch cord bag 110 are housed separately in two inner bags 113. This allows the branch cord sections 20 to be housed in a separated state in the branch cord bag 110 according to the connection locations of the branch cord sections 20 and the required work. In particular, the work of connecting multiple branch cord sections 20 to the server rack 1200 can be cumbersome because of the large number of branch cord sections 20 to be connected. Separating the branch cord sections 20 using the inner bags 113 allows the installation work to be carried out more efficiently.

[0054] According to the optical branching cable set 100 of this embodiment, the branching cord bag 110 is formed with an excess length 114 that extends along the curvature of the optical branching cable 1, and since the excess length 114 is sufficiently extended, the branching cord bag 110 is less likely to fall off from the optical branching cable 1.

[0055] Second Embodiment Next, an optical branching cable set 200 according to a second embodiment will be described. Fig. 6 is a cross-sectional view of the optical branching cable set 200 taken along a plane perpendicular to the axis of the main cable 10. Like the optical branching cable set 100 according to the first embodiment, the optical branching cable set 200 includes a plurality of optical branching cables 1 and a branching cord bag 210. The branching cord bag 210 can collectively accommodate a plurality of branching cord sections 20 included in the plurality of optical branching cables 1.

[0056] The branch cord bag 210 is attached so as to be wound around the main cable 10 and the branch cord portion 20. The branch cord bag 210 includes a first portion 211, a second portion 212, and a third portion 213. The first portion 211 is located below the main cable 10. A plurality of through holes H are formed in the first portion 211. The second portion 212 is disposed so as to be sandwiched between the main cable 10 and the branch cord portion 20. The third portion 213 is disposed so as to cover the upper portion of the branch cord portion 20.

[0057] The main cable 10 is fixed to the branch cord bag 210 by a bundling member 214. The bundling member 214 passes through the through hole H and is wound around the first portion 211 and the two main cables 10. This restricts the main cable 10 from moving upward, forward, and backward relative to the first portion 211.

[0058] The second part 212 and the third part 213 are bonded together with a hook-and-loop fastener, which closes the space between the second part 212 and the third part 213, making it difficult for the branch cord part 20 to come out of the branch cord bag 210.

[0059] Next, the assembly of the branch cord bag 210 will be described. The branch cord bag 210 is assembled through a first stage, a second stage, and a third stage. FIG. 7 illustrates the branch cord bag 210 in the first stage. Note that dashed lines indicate the boundaries between the first section 211, the second section 212, and the third section 213. In the branch cord bag 210 in the first stage, the first section 211, the second section 212, and the third section 213 are not yet assembled. The optical branch cable 1 is arranged so as to be placed on the first section 211.

[0060] Fig. 8 illustrates the branch cord bag 210 in the second stage. As illustrated in Fig. 8, in the second stage, the second portion 212 is folded onto the main cable 10. Furthermore, the branch cord portion 20 is disposed on the second portion 212. A slit S is formed in the second portion 212 (see also Fig. 7). The branch cord portion 20, which is led out from the main cable 10 at the branch portion BR, passes through the slit S and is disposed on the second portion 212.

[0061] A fifth hook-and-loop fastener 212a is provided on the second section 212. The fifth hook-and-loop fastener 212a is formed so that the fifth hook-and-loop fastener 212a faces upward when the second section 212 is folded onto the main cable 10. The fifth hook-and-loop fastener 212a forms a hook surface of the hook-and-loop fastener.

[0062] 9 illustrates the branch cord bag 210 in the third stage. As illustrated in FIG. 9, in the third stage, the third section 213 is folded so as to cover the branch cord section 20. As a result, the branch cord section 20 is housed between the second section 212 and the third section 213.

[0063] The third section is provided with a sixth surface fastener 213a (see also FIG. 8). The sixth surface fastener 213a is formed so that at least a portion of the sixth surface fastener 213a faces downward when the third section 213 is folded onto the branch cord section 20. The sixth surface fastener 213a forms a loop surface of the surface fastener.

[0064] In the third stage, the fifth surface fastener 212a and the sixth surface fastener 213a are formed to be adhesive. When the fifth surface fastener 212a and the sixth surface fastener 213a are adhered to each other, the assembly of the branch cord bag 210 is completed.

[0065] In the optical branching cable set 200 according to the second embodiment, the branching cord bag 210 can also accommodate the branching cord sections 20 of the multiple optical branching cables 1 all at once, so the multiple branching cord sections 20 are protected by a smaller number of branching cord bags 210 than the number of optical branching cables 1. This reduces the number of parts, making it possible to provide an optical branching cable set 200 that protects the branching cord sections 20 while being easy to manufacture.

[0066] (Third embodiment) Next, an optical branching cable set 300 according to a third embodiment will be described. Fig. 10 is a perspective view of the optical branching cable set 300 according to the third embodiment. Fig. 11 illustrates the optical branching cable set 300 according to the third embodiment and a branching cord bag 310.

[0067] The optical branching cable set 300 according to the third embodiment includes 22 optical branching cables 1. One branching cord bag 310 accommodates 22 branching cord portions 20.

[0068] Fig. 12 illustrates an example of the arrangement of the branch cord portions 20 of each optical branch cable 1. For the sake of explanation, the optical branch cables 1 will be referred to as the first optical branch cable, the second optical branch cable, ..., the twenty-second optical branch cable in the order in which they are arranged from left to right on the page of Fig. 12. Similarly, the branch cord portions 20 included in the first optical branch cable, the second optical branch cable, ..., the twenty-second optical branch cable will be referred to as the first branch cord portion 20A, the second branch cord portion 20B, ..., the twenty-second branch cord portion 20V.

[0069] 12, the branch cord portions 20 are arranged in three rows in the longitudinal direction of the optical branch cable 1. The top row includes branch cord portions 20 from the first branch cord portion 20A to the seventh branch cord portion 20G. The center row includes branch cord portions 20 from the eighth branch cord portion 20H to the fourteenth branch cord portion 20N. The bottom row includes branch cord portions 20 from the fifteenth branch cord portion 20O to the twenty-second branch cord portion 20V. Each branch cord portion 20 is wound clockwise in a coil shape in a plan view.

[0070] The branch cord portions 20 should be arranged so that the bending radius is as large as possible. For example, in the left column, the first branch cord portion 20A is arranged farthest from the branch portion BR. The first branch cord portion 20A through the seventh branch cord portion 20G are arranged in order of increasing distance from the branch portion BR. In other words, the seventh branch cord portion 20G is arranged closest to the branch portion BR.

[0071] Similarly, in the center column, the eighth branch cord portion 20H is located farthest from the branch portion BR. The eighth branch cord portion 20H through the fourteenth branch cord portion 20N are located in order of distance from the branch portion BR. In other words, the fourteenth branch cord portion 20N is located closest to the branch portion BR. Furthermore, in the right column, the fifteenth branch cord portion 20O is located farthest from the branch portion BR. The fifteenth branch cord portion 20O through the twenty-second branch cord portion 20V are located in order of distance from the branch portion BR. In other words, the twenty-second branch cord portion 20V is located closest to the branch portion BR.

[0072] By arranging the branch cord sections 20 in this manner, the branch cord section 20 arranged closest to the branch section BR is the branch cord section 20 of the rightmost optical branch cable 1 in each row. In this case, when the branch cord section 20 is wound clockwise into a coil, the branch cord section 20 arranged closest to the branch section BR is less likely to be bent with a bending radius smaller than a predetermined bending radius.

[0073] Furthermore, when removing the branch cord sections 20, the branch cord sections 20 are arranged in order, so that when connecting the branch cord sections 20 to the server rack 1200 or the like, it is difficult to mix up the branch cord sections 20, and the work of connecting the branch cord sections 20 is easy.

[0074] In the optical branching cable set 300 according to the third embodiment, the branching cord bag 310 can also accommodate all of the branching cord sections 20 included in the plurality of optical branching cables 1, so that the plurality of branching cord sections 20 are protected by a smaller number of branching cord bags 310 than the number of optical branching cables 1. This reduces the number of parts, making it possible to provide an optical branching cable set 300 that protects the branching cord sections 20 while being easy to manufacture.

[0075] Although the present disclosure has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the present disclosure. Furthermore, the number, position, shape, etc. of the components described above are not limited to the above embodiments, and can be changed to the number, position, shape, etc. that are suitable for implementing the present disclosure.

[0076] The branch cord bag 110 may include more or less than two inner bags 113. [Explanation of symbols]

[0077] 1 Optical branching cable 10 Main Cable 10a Third hook-and-loop fastener 10b Fourth hook-and-loop fastener 11 Optical cord 11A optical fiber core 12 Tensile strength body 13 Tape 14 First Bundle 15 Optical Code Group 16 Second Bundle 17 Core 20 Branching code section 20A First branch cord 20B Second branch cord section 20G seventh branch cord 20H Eighth branch cord section 20N 14th branch cord section 20O 15th Branch Code Section 20V 22nd branch cord part 21 Optical Connector 40 Regulated Parts 50 Tip Bag 60 connecting loop 100, 200, 300 Optical Branch Cable Set 110, 210, 310 Branch cord bag 110a First hook-and-loop fastener 110b Second hook-and-loop fastener 111 Base 112 Top section 113 Inner bag 114 Extra length 211 Part 1 212 Part 2 212a Fifth hook-and-loop fastener 213 Part 3 213a Sixth hook-and-loop fastener 214 Binding members 1000 Optical Communication Systems 1100 Distribution board 1200 Server Rack BR branch H through hole S slit T Cable laying tray

Claims

1. It is equipped with multiple optical branching cables and a branching cord bag. At least two of the optical branching cables each have a main cable including a plurality of optical cords each including at least one optical fiber core, a tension member, and a tape forming an outermost layer; a branch cord portion including at least one optical fiber core wire led out from the optical cord of the main cable to an outer side than the outermost layer, The branch cord bag is capable of collectively accommodating a plurality of branch cord portions provided on a plurality of the optical branch cables. Optical branching cable set.

2. The branch cord bag is formed of a material having cushioning properties. The optical branch cable set according to claim 1 .

3. The branch cord bag is fixed to the plurality of optical branch cables at two different locations along the main cable.

3. The optical branching cable set according to claim 1.

4. the branch cord bag includes a base portion disposed so as to be sandwiched between the main cable and the branch cord portion when the branch cord portion is accommodated in the branch cord bag, and a top surface portion positioned so as to cover an upper portion of the branch cord portion, the base portion is formed so as not to cover a branch portion from which the branch cord portion is led out from the main cable, The top surface portion is formed to have a dimension larger than that of the base portion along the axis of the main cable so as to be able to cover the branch portion.

3. The optical branching cable set according to claim 1.

5. the branch cord bag includes an inner bag that can be accommodated inside the branch cord bag, The inner bag is capable of accommodating the branch cord portion of at least a part of the optical branch cable.

3. The optical branching cable set according to claim 1.

6. The outer surface of the branch cord bag is formed with an excess length that extends in accordance with the curvature of the optical branch cable.

3. The optical branching cable set according to claim 1.

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