Optical fiber wiring branching component and optical fiber wiring branching structure

Abstract

To provide an optical fiber wiring branch part capable of branching a tension member and multiple optical fibers without contact with each other inside the branch part, and an optical fiber wiring branch structure.SOLUTION: An optical fiber wiring branch part 10 includes: a cylinder part 58 that passes a tension member 78 and multiple optical fibers 75 from one side A1 to the other side A2 in the axial direction; and a branching part 52 that is provided at the end of the other side A2 of the cylinder part 58 in the axial direction, in which a tension member 78 passage section for passing through the tension member 78 and an optical fiber 75 passage section for passing the optical fiber 75 are arranged in an annular shape when viewed from the other side A2 in the axial direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an optical fiber wiring branching component and an optical fiber wiring branching structure. [Background technology]

[0002] For example, Patent Document 1 discloses a branching section that branches an optical fiber cable having a tension member and multiple optical fiber cores at its end, in which the end of the branching part is fitted onto the end of the optical fiber cable, the tension member led out from the end of the optical fiber cable is inserted into a through hole provided in the branching part, the optical fiber cores led out from the end of the optical fiber cable are accommodated in a groove provided in the branching part, the branching part and the tension member are fixed with a first fixing member, and the end of the branching part and the end of the optical fiber cable are fixed with a second fixing member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-295019 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the case of Patent Document 1, since the tension member is fixed to the axial center of the branching component, there is a possibility that the optical fiber core and the tension member may rub against each other within the branching portion, resulting in damage.

[0005] The present invention has been made in light of the above-mentioned problems, and aims to provide an optical fiber wiring branching component and an optical fiber wiring branching structure in which a tension member and multiple optical fibers can be branched without contacting each other inside the branching component. [Means for solving the problem]

[0006] The first aspect of the invention is an optical fiber wiring branching component comprising: a tubular portion through which a tension member and a plurality of optical fibers are passed from one side to the other in the axial direction; and a branching portion provided at the other end of the tubular portion in the axial direction, in which a tension member passing portion through which the tension member is passed and an optical fiber passing portion through which the optical fiber is passed are arranged in a ring shape when viewed from the other side in the axial direction.

[0007] In this optical fiber wiring branching component, the tension member-passing portion and the optical fiber-passing portion are arranged in a ring shape when viewed axially at the branching portion, so that the tension member and the multiple optical fibers do not come into contact with each other when passing from one side to the other in the axial direction, thereby reducing the possibility of the tension member and the multiple optical fibers rubbing against each other and damaging the optical fibers.

[0008] In a second aspect of the invention, in the optical fiber wiring branching component according to the first aspect, the tension member-passing portion and the optical fiber-passing portion are arranged in an annular shape when viewed from the axial direction.

[0009] According to this optical fiber wiring branching component, the tension member passing portion and the optical fiber passing portion are arranged in a circular ring shape when viewed from the axial direction, so the radial size of the tubular portion and the branching portion can be made smaller than when the tension member passing portion and the optical fiber passing portion are not arranged in a circular ring shape.

[0010] A third aspect of the invention is an optical fiber wiring branching structure comprising: a protective tube that houses all of a plurality of optical fibers; an optical cable main tube that houses a tension member arranged outside the protective tube; and an optical fiber wiring branching component according to the first or second aspect attached to an end of the optical cable main tube.

[0011] This optical fiber wiring branching structure uses an optical fiber wiring branching component that can reduce the possibility of the optical fibers and tension members rubbing against each other and damaging the optical fibers. Therefore, even in a structure in which multiple optical fibers branch out from a single protective tube, it is possible to reduce the possibility of the optical fibers being damaged by the tension members rubbing against each other. [Effects of the Invention]

[0012] According to the present invention, there are provided an optical fiber wiring branching component and an optical fiber wiring branching structure that enable branching without contact between a tension member and a plurality of optical fibers inside the branching component. [Brief explanation of the drawings]

[0013] [Figure 1] 1A and 1B are diagrams illustrating an optical cable main pipe used in the description of the present disclosure, where FIG. 1A is a front view of the optical cable main pipe, and FIG. 1B is a side view of the optical cable main pipe. [Figure 2] 10A and 10B are longitudinal cross-sectional views illustrating a method of connecting a first cable fixing component of a branching component and an optical cable main tube according to the present disclosure. [Figure 3] 3A and 3B are plan views illustrating a method of connecting a second cable fixing component of a branching component according to the present disclosure to an optical cable main tube, where FIG. 3A is a front view and FIG. 3B is a side view. [Figure 4] 4A and 4B are plan views for explaining a method of connecting an optical fiber distribution branching component and an optical cable main tube according to the present disclosure, where FIG. 4A is a front view and FIG. 4B is a side view. [Figure 5] 1 is a perspective view illustrating an optical fiber wiring branching structure using a branching component according to the present disclosure. [Figure 6] 6A and 6B are plan views for explaining a conventional method of connecting an optical fiber wiring branching component and an optical cable main tube, with FIG. 6A being a front view and FIG. 6B being a side view. [Figure 7] FIG. 10 is a perspective view illustrating a first modified example of a branching component according to the present disclosure. [Figure 8]FIG. 10 is a side view illustrating a second modified example of a branching component according to the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0014] An example of an embodiment of the present disclosure will be described below with reference to the drawings. In each drawing, the same or equivalent components and parts are designated by the same reference numerals. Furthermore, the dimensional proportions in the drawings are exaggerated for the sake of explanation and may differ from the actual proportions.

[0015] In the following description, directions such as "upper side," "lower side," "left side," and "right side" indicate directions on the paper surface of the drawings to which reference is made, and may differ from actual directions.

[0016] (Optical cable main pipe 70) 1 is a diagram illustrating an optical cable main pipe 70 used in the description of the present disclosure. As shown in FIG. 1(A), the optical cable main pipe 70 used in the present disclosure houses a protection pipe 72 that houses an optical fiber bundle 74, a tension member 78, and a spacer 76.

[0017] The optical fiber bundle 74 is formed by bundling together a plurality of optical fibers 75 coated with resin, for example.

[0018] The protective tube 72 is, for example, a flexible stainless steel tube with a diameter of 1.8 mm and a thickness of 0.2 mm, and is a component that protects the optical fiber 75 from damage when pressure or the like is applied to the optical cable main tube 70.

[0019] The tension member 78 is, for example, a steel wire coated with resin, and has the strength to not easily deform under tensile load. Therefore, when a tensile load is applied to the optical cable main pipe 70, the tension member 78 can withstand the tensile load, thereby preventing damage to the entire optical cable main pipe 70.

[0020] The spacer 76 is a fibrous member that is incorporated into the optical cable main pipe 70 together with the protective tube 72 and the tension member 78, thereby maintaining the cross-sectional shape of the optical cable main pipe 70 (circular in this embodiment).

[0021] The optical cable main pipe 70 may have any structure, but as an example, the pipe body is formed by wrapping the protective pipe 72, spacer 76, and tension member 78 in nonwoven fabric, and then covering the nonwoven fabric with polyethylene.

[0022] The optical cable main tube 70 is connected to the optical fiber wiring branching component 10, which will be described next, with the optical fiber bundle 74 and tension member 78 exposed at the end 80 and the protective tube 72 remaining at a predetermined length.

[0023] (Optical fiber wiring branching component 10) The optical fiber distribution branching component 10 according to the present disclosure has a three-part structure including a first cable fixing component 20, a second cable fixing component 30, and a branching component 50. The shape and function of each component will be described together with the procedure for attaching the optical fiber distribution branching component 10 to the end of an optical cable main tube 70 to complete the optical fiber distribution branching component 10.

[0024] (First cable fixing component 20) As shown in FIG. 2, the first cable fixing component 20 according to the present disclosure is a tubular body having a generally cylindrical general portion 22 and a connection portion 28, one end of which is configured as a second cable fixing component 30, which will be described later.

[0025] The inner diameter of the general portion 22 is slightly larger than the outer diameter of the optical cable main tube 70, and the general portion 22 fits loosely into the optical cable main tube 70.

[0026] The general portion 22 also has a fastening portion 24 that communicates the radial inside of the general portion 22 with the radial inside and outside.

[0027] The connecting portion 28 is, for example, a portion that extends with one end reduced in diameter relative to the general portion 22, and a first connecting portion 42 of the second cable fixation component 30, which will be described later, is loosely fitted into the connecting portion 28. The connecting portion 28 also has a detent portion 29 that connects the inside and outside of the connecting portion 28 in the radial direction.

[0028] 2, the optical cable main tube 70 is inserted from one axial side A1 into the general part 22 of the first cable fastening component 20. An adhesive is applied to the outer peripheral surface of the optical cable main tube 70 inserted into the general part 22.

[0029] Then, with the stripped end 80 of the optical cable main tube 70 aligned with the end face 26 of the connection portion 28 in the first cable fixing component 20, a fastener F1, such as a screw, is inserted into the fastening portion 24.

[0030] Then, the optical cable main tube 70 and the first cable fixing component 20 are fixed together by the fastener F1 and the adhesive on the outer peripheral surface of the optical cable main tube 70.

[0031] The first cable fixing component 20 is formed by cutting metal, for example, but is not limited to this and may be formed by processing hard resin by injection molding or the like.

[0032] (Second cable fixing component 30) As shown in FIG. 3, the second cable fixation component 30 according to the present disclosure includes a partition portion 32, a first connecting portion 42, and a second connecting portion 44.

[0033] As shown in FIG. 3(A), the partition portion 32 has a through hole 34 and a plurality of through holes 36.

[0034] As shown in FIG. 3(B), the through-hole 34 communicates from one side A1 to the other side A2 in the axial direction at the center in the radial direction.

[0035] 3(B), the through holes 36 are radially outward of the through holes 34, are concentric with each other, and communicate from one side A1 to the other side A2 in the axial direction. A protective tube 72 is inserted into the through holes 36 from one side A1 in the axial direction. Furthermore, a tension member 78 is inserted from one side A1 in the axial direction into the through hole 36 on the opposite side of the through hole 34 from the through hole 36 through which the protective tube 72 is inserted.

[0036] 3A, multiple through holes 36 are formed in the partition section 32, but the number of through holes 36 through which the protective tubes 72 are inserted is the same as the number of protective tubes 72 housed in the optical cable main tube 70. In other words, one protective tube 72 is inserted into one through hole 36. When there is one protective tube 72, as in this embodiment, one through hole 36 is used. When there are multiple protective tubes 72, multiple through holes 36 are used.

[0037] When the number of through holes 36 and the number of protective tubes 72 are the same, the tension members 78 are inserted through the through holes 34 .

[0038] Each through hole 36 also has a fastening portion 40 that connects the inside and outside in the radial direction.

[0039] The first connection portion 42 is a portion where the first cable fixing component 20 is connected to one axial side A1 of the partition portion 32, and has an inner diameter slightly larger than that of the connection portion 28 of the first cable fixing component 20, and fits with the connection portion 28.

[0040] The first connecting portion 42 also has a fastening portion 41 that connects the inside and outside in the radial direction. Note that the fastening portion 41 is positioned in the axial direction to match the fastening portion 29 of the connecting portion 28 when the connecting portion 28 of the first cable fixation component 20 and the first connecting portion 42 are fitted together, as will be described later.

[0041] The second connecting portion 44 is a portion to which the branching component 50 is connected on the other axial side A2 of the partitioning portion 32, and as an example, the other side A2 extends from the partitioning portion 32 with a reduced diameter.

[0042] As an example, the second cable fixing component 30 is formed by cutting metal, but this is not limiting and the second cable fixing component 30 may be formed by processing hard resin by injection molding or the like.

[0043] As shown in FIG. 3(B), the protective tube 72 and the tension member 78 exposed from the optical cable main tube 70 to which the first cable fixing component 20 is fixed are inserted into the through hole 36 of the second cable fixing component 30.

[0044] Furthermore, with the tension member 78 and the protective tube 72 inserted into the through-holes 36, the connecting portion 28 of the first cable fixing component 20 and the first connecting portion 42 are fitted together.

[0045] Then, with the connection portion 28 of the first cable fixing component 20 and the first connection portion 42 fitted together, a fastener F2 such as a screw is inserted into the fastening portion 41 of the first connection portion 42, for example.

[0046] As described above, the axial positions of the retaining portion 29 of the first cable fixing component 20 and the retaining portion 41 of the first connecting portion 42 are aligned, so the fastener F2 is inserted from the outside of the first connecting portion 42 to the retaining portion 29.

[0047] In this way, the second cable fixing component 30 and the first cable fixing component 20 are fixed together in the axial and radial directions by the fastener F2.

[0048] In addition, in the fastening portion 40, the tension member 78 and the protective tube 72 are fixed from the radial outside of the partition portion 32 by fasteners F3 such as screws, for example.

[0049] Next, a branching component 50, which corresponds to the optical fiber wiring branching component 10 in this embodiment, will be described with reference to Figures 4 and 5. Note that in Figure 5, fastening portions 60 and 63, which will be described later, are not shown.

[0050] (Branch part 50) As shown in FIG. 4, the branching component 50 according to the present disclosure has a substantially cylindrical tubular portion 58, a connection portion 62 to which the second cable fixing component 30 is connected on one axial side A1 of the tubular portion 58, and a branching portion 52 that branches off a tension member 78 and an optical fiber 75 of an optical fiber bundle 74 on the other axial side A2 of the tubular portion 58.

[0051] The connecting portion 62 is the portion to which the second connecting portion 44 of the second cable fixing component 30 is connected, and is slightly larger than the second connecting portion 44 of the second cable fixing component 30 and fits with the second connecting portion 44.

[0052] The connecting portion 62 also has a fastening portion 61 that connects the inside and outside in the radial direction.

[0053] The cylindrical portion 58 is a hollow cylindrical body, through which the tension member 78 and the optical fiber bundle 74, which are passed through the through hole 36 of the second cable fixing component 30, are passed toward the other axial side A2 of the branching portion 52, which will be described later.

[0054] As shown in Figure 4(B), the branching portion 52 has a tension member passing portion 56 through which the tension member 78 passes from one axial side A1 to the other axial side A2, and an optical fiber passing portion 54 through which each of the optical fibers 75 of the optical fiber bundle 74 passes from one axial side A1 to the other axial side A2.

[0055] The tension member passing portion 56 in this description is a circular hole that communicates from one side A1 to the other side A2 of the branch portion 52, and has a fastening portion 63 that communicates between the inside and outside of the branch portion 52 in the radial direction.

[0056] Each of the optical fiber passing portions 54 in this description is a circular hole that communicates from one side A1 to the other side A2 of the branching portion 52, and has a fastening portion 60 that communicates the inside and outside of the branching portion 52 in the radial direction.

[0057] Here, the tension member-passing portion 56 and the optical fiber-passing portion 54 according to the present disclosure are each formed concentrically from the radial center of the branch portion 52, as shown in FIG. 4(A).

[0058] In other words, the tension member-passing portions 56 and the optical fiber-passing portions 54 according to the present disclosure are formed in the branch portion 52 in a state where they are lined up in an annular shape.

[0059] In this disclosure, "annular" refers to an arrangement shape in which, when the positions of the tension member-passing portion 56 and the optical fiber-passing portion 54 when the branching portion 52 is viewed from the axial direction are taken as the vertices of a polygon, the size of the interior angle of each vertex is 180° or less.

[0060] The branching part 50 is formed by cutting metal, for example, but is not limited to this, and may be formed by processing hard resin by injection molding or the like.

[0061] In addition, in the branching component 50 according to the present disclosure, as shown in Figures 4(B) and 5, the optical fiber 75 is inserted from the through hole 36 of the second cable fixing component 30 into each of the optical fiber passing portions 54 of the branching section 52, and is passed to the other axial side A2 of the branching component 50.

[0062] Here, in the branch component 50 according to the present disclosure, as shown in Figures 4(B) and 5, the tension member 78 is inserted through the tension member passing portion 56 of the branch section 52 from the through hole 36 on the opposite side of the through hole 34 to the through hole 36 through which the protective tube 72 of the second cable fixing component 30 is inserted, and is passed to the other axial side A2 of the branch component 50.

[0063] Furthermore, with the tension member 78 and the optical fiber 75 inserted into the tension member-passing portion 56 and the optical fiber-passing portion 54, respectively, the second connecting portion 44 of the second cable fixing component 30 and the connecting portion 62 of the branching component 50 are fitted together.

[0064] Then, with the second connection portion 44 of the second cable fixing component 30 and the connection portion 62 of the branching component 50 engaged with each other, a fastener F4, such as a screw, is inserted into the fastening portion 61, thereby fixing the branching component 50 and the second cable fixing component 30 together.

[0065] In this state, another tubular connecting part (not shown) is inserted into the tension member passing portion 56 and the optical fiber passing portion 54 in the branching portion 52 from the other axial side A2, while accommodating the tension member 78 and the optical fiber 75.

[0066] Then, each of the other connecting parts is inserted into the tension member passing portion 56 and the optical fiber passing portion 54, and then fixed to the tension member passing portion 56 and the optical fiber passing portion 54 from the outside of the tension member passing portion 56 and the optical fiber passing portion 54 by fasteners F6 such as screws and F5 such as screws, for example.

[0067] In this manner, an optical fiber distribution branching structure 90 is obtained by combining the optical fiber distribution branching component 10 according to the present disclosure with the optical cable main tube 70.

[0068] (Conventional optical fiber wiring branching component 110) 6 shows a conventional optical fiber distribution branching component 110. Note that among the components of the conventional optical fiber distribution branching component 110, those components that are the same as those of the optical fiber distribution branching component 10 according to the present disclosure are given the same reference numerals plus 100, and detailed descriptions thereof will be omitted.

[0069] As shown in FIGS. 6(A) and 6(B), in the conventional optical fiber distribution branching component 110, a tension member passing portion 156 is provided at the center in the radial direction of the branching portion 152.

[0070] In this case, each of the optical fibers 75 is inserted from one axial side A1 to the other axial side A2 through the through hole 36 in the second cable fixing component 30, in other words, at a position radially offset from the radial center of the partition portion 32 of the second cable fixing component 30, to the optical fiber passing portion 154 of the branching portion 152, in other words, at a position radially offset from the radial center of the branching portion 152.

[0071] In this case, the tension member 78 is inserted from the through hole 36 on the opposite side of the through hole 34 to the through hole 36 through which the protective tube 72 in the second cable fixing component 30 is inserted, into the tension member insertion portion 156 of the branch portion 152, in other words, at the radial center of the branch portion 152, from one axial side A1 to the other axial side A2.

[0072] That is, as shown in Figure 6(B), the optical fiber 75 is passed through the inside of the tubular portion 158 of the branching component 150 from the through hole 36 to the optical fiber passing portion 154, to a position up to 180° away in the circumferential direction.

[0073] In contrast, as shown in Figure 6(B), the tension member 78 is passed through the through hole 36 on the opposite side of the through hole 34, through which the protective tube 72 is inserted, inside the tubular portion 158 of the branch part 150, to the tension member passing portion 156, to a position that is the radial center.

[0074] Therefore, in the conventional optical fiber distribution branching component 110, the tension member 78 and the optical fiber 75 may be passed through the inside of the cylindrical portion 158 of the branching component 150 while coming into contact with each other.

[0075] Therefore, in the conventional optical fiber wiring branching component 110, the tension member 78 and the optical fiber 75 may come into contact with each other inside the cylindrical portion 158 of the branching component 150, possibly damaging the optical fiber 75.

[0076] (Action and effect) Here, the optical fiber wiring branching component 10 according to the present disclosure comprises a branching component 50, a tubular portion 58 through which a tension member 78 and a plurality of optical fibers 75 are passed from one axial side A1 to the other axial side A2, and a branching portion 52 provided at the end of the other axial side A2 of the tubular portion 58, in which a tension member passing portion 56 through which the tension member 78 is passed and an optical fiber passing portion 54 through which the optical fiber 75 is passed are arranged in a ring shape when viewed from the other axial side A2.

[0077] As a result, according to the optical fiber wiring branching component 10 of the present disclosure, as shown in Figures 4(B) and 5, the tension member passing portion 56 and the optical fiber passing portion 54 are arranged in a ring shape in the branching portion 52 when viewed from the axial direction, so that the tension member 78 and the multiple optical fibers 75 do not come into contact with each other when passed from one side A1 to the other side A2 in the axial direction.

[0078] Therefore, according to the optical fiber branching component 10 of the present disclosure, it is possible to reduce the possibility that the tension member 78 and the plurality of optical fibers 75 will rub against each other and damage the optical fibers 75.

[0079] In the optical fiber distribution branch component 10 according to the present disclosure, the tension member-passing portions 56 and the optical fiber-passing portions 54 are arranged in an annular shape when viewed in the axial direction.

[0080] As a result, according to the optical fiber wiring branching component 10 of the present disclosure, the tension member passing portion 56 and the optical fiber passing portion 54 are arranged in a circular ring shape when viewed from the axial direction, and therefore the radial size of the tubular portion 58 and the branching portion 52 can be made smaller than when the tension member passing portion 56 and the optical fiber passing portion 54 are not arranged in a circular ring shape.

[0081] Therefore, with this optical fiber wiring branching component 10, the radial size when viewed from the axial direction can be made smaller than when the tension member passing portion 56 and the optical fiber passing portion 54 are not arranged in a circular ring shape.

[0082] In addition, the optical fiber wiring branching structure 90 according to the present disclosure includes a single protective tube 72 that houses all of the multiple optical fibers 75, an optical cable main tube 70 that houses a tension member 78 arranged outside the protective tube 72, and an optical fiber wiring branching component 10 according to the first or second embodiment attached to an end 80 of the optical cable main tube 70.

[0083] As a result, the optical fiber distribution branching structure 90 according to the present disclosure uses the optical fiber distribution branching component 10 that can reduce the possibility of the optical fiber 75 being damaged due to friction between the optical fiber 75 and the tension member 78.

[0084] Therefore, according to the optical fiber wiring branching structure 90 of the present disclosure, even in a structure in which multiple optical fibers 75 branch out from a single protective tube 72, the possibility of the tension member 78 and the multiple optical fibers 75 rubbing against each other and damaging the optical fibers 75 can be reduced.

[0085] Next, modified examples of the optical fiber branching component 10 and the optical fiber branching structure 90 according to the present disclosure will be described.

[0086] (First Modification) 7 is a diagram of a first modified example of the optical fiber branching component 10 according to the present disclosure. In the first modified example, the tension member-passing portion 56 and the optical fiber-passing portion 54 formed in the branching portion 52 are grooves, instead of circular holes, that have cuts extending radially outward from the branching portion 52.

[0087] As shown in FIG. 7, even when the tension member-passing portion 56 and the optical fiber-passing portion 54 are grooved, the tension member 78 and the optical fiber 75 do not come into contact with each other inside the cylindrical portion 58.

[0088] Therefore, in this modified example, the same effects as those of the optical fiber branching component 10 according to the present disclosure can be obtained.

[0089] (Second Modification) 8 is a diagram of a second modified example of the optical fiber branching component 10 according to the present disclosure. In the second modified example, the second cable fixing component 30 and the first cable fixing component 20, which are two components in the embodiment of the present disclosure, are integrated into a cable fixing component 25. As a result, the optical fiber branching component 10 has a two-part structure including the cable fixing component 25 and the branching component 50.

[0090] In the cable fixing component 25 shown in FIG. 8, the optical cable main tube 70 is inserted from one axial side A1 of the cable fixing component 25, whereby the protective tube 72 and the tension member 78 can be fixed in the through hole 36, similar to the embodiment of the present disclosure.

[0091] In this way, even when the second cable fixing component 30 and the first cable fixing component 20 are integrated into the cable fixing component 25 as shown in FIG. 8, by connecting it to the branching component 50, the tension member 78 and the optical fiber 75 will not come into contact with each other.

[0092] Therefore, in this modified example, the same effects as those of the optical fiber branching component 10 according to the present disclosure can be obtained.

[0093] (Other variations) In the above description, the tension member-passing portion 56 and the optical fiber-passing portion 54 are arranged in an annular shape, but the shape of the branch portion 52 of the branch component 50 according to the present disclosure is not limited to this.

[0094] As described above, in the branching component 50 according to the present disclosure, the tension member passing portion 56 and the optical fiber passing portion 54 are arranged in a ring shape, so that they do not come into contact with each other inside the tubular portion 58, thereby reducing the possibility of damage to the optical fiber 75.

[0095] Furthermore, the above-mentioned actions and effects can be obtained not only in circular rings, but also in shapes other than those that are concave inward when viewed from the axial direction, such as elliptical rings and polygonal rings.

[0096] Therefore, the term "annular" in the present disclosure includes not only the circular annular shape described above, but also elliptical annular shapes, polygonal annular shapes, and other shapes excluding shapes that are concave inward when viewed from the axial direction, such as a heart shape.

[0097] In addition, in the above description, the optical fiber wiring branching component 10 is connected by inserting other wiring components into the tension member passing portion 56 and the optical fiber passing portion 54 from one axial side A1 at the branching portion 52, but this is not limited to this.

[0098] For example, the branch portion 52 may be configured as a component that does not allow other wiring components to be inserted from one axial side A1 of the branch portion 52, such as a so-called connector.

[0099] Furthermore, in the above explanation, the optical cable main pipe 70 is described as having a protective tube 72 that houses the optical fiber 75, but this is not limited to this and the same applies to an optical cable main pipe 70 that does not have a protective tube 72.

[0100] In the above description, the optical cable main tube 70 has been described as having one protective tube 72, but this is not limited thereto, and the optical fiber wiring branching component 10 according to the present disclosure may have the optical cable main tube 70 having two or more protective tubes 72.

[0101] The above describes an embodiment of the present disclosure with reference to the accompanying drawings. However, it is clear that a person with ordinary knowledge in the field of technology to which the present disclosure pertains can conceive of various modifications or applications within the scope of the technical ideas set forth in the claims, and it is understood that these also naturally fall within the technical scope of the present disclosure. [Explanation of symbols]

[0102] 10 Optical fiber wiring branching parts 20 First cable fixing part 22 General section 24 Fastener 25 Cable fixing parts 26 End face 28 Connection 30 Second cable fixing part 32 Partition 34 Through hole 36 Through hole 40 Fastener 41 Fastener 42 First connection part 44 Second connection part 50 Branching parts 52 Branch 54 Optical fiber passage 56 Tension member insertion part 58 Cylinder part 60 Fastener 61 Fastener 62 Connection 70 Optical fiber cable main pipe 72 Protection tube 74 Optical Fiber Bundle 75 Optical Fiber 76 Spacer 78 Tension member 80 End 150 Branching parts 152 Branch 154 Optical fiber passage 156 Tension member threading part 158 Cylinder part

Claims

1. An optical fiber wiring branching component to which a single protective tube containing all of a plurality of optical fibers and an optical cable main tube containing a tension member arranged outside the protective tube are connected, the optical fiber wiring branching component branching the tension member and the plurality of optical fibers, a hollow cylindrical portion through which the tension member and the plurality of optical fibers pass from one side to the other in the axial direction; a branch portion provided at the other end of the cylindrical portion in the axial direction, in which tension member passing portions through which the tension members pass and optical fiber passing portions through which the optical fibers pass are all arranged in an annular shape when viewed from the other side in the axial direction; Equipped with the optical cable main pipe is inserted into the one side of the cylindrical portion; the through-portions formed in the branch portion are limited to the tension member through-portion and the optical fiber through-portion; Optical fiber wiring branching parts.

2. the tension member-passing portion and the optical fiber-passing portion are arranged in an annular shape when viewed from the axial direction; The optical fiber wiring branch component according to claim 1.

3. the optical cable main pipe; the optical fiber wiring branching component according to claim 1 or 2, which is attached to an end of the optical cable main tube, the plurality of optical fibers being passed through the plurality of optical fiber passing portions, and the tension member being passed through the tension member passing portion; An optical fiber wiring branching structure comprising:

4. The optical cable main pipe, an optical fiber wiring branching component attached to an end of the optical cable main tube, in which a plurality of optical fibers are passed through a plurality of optical fiber passing portions and a tension member is passed through the tension member passing portion; Equipped with The optical fiber wiring branching component comprises: a hollow cylindrical portion through which the tension member and the plurality of optical fibers pass from one side to the other in the axial direction; a branch portion provided at the other end of the cylindrical portion in the axial direction, the branch portion having the tension member passing portion through which the tension member passes and the optical fiber passing portion through which the optical fiber passes arranged in an annular shape when viewed from the other side in the axial direction; Equipped with a main optical cable tube that houses one protective tube that houses all of the plurality of optical fibers and a tension member that is disposed outside the protective tube, is inserted into the one side of the cylindrical portion; Optical fiber wiring branch structure.

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