JP2022030593A - Optical cable fixing device - Google Patents

Abstract

To provide an optical cable fixing device that is applicable to a plurality of kinds of optical cables.SOLUTION: An optical cable fixing device 10 fixes an optical cable having a plurality of optical fibers, tension members and a sheath to a member to be fixed. The fixing device comprises: a sheath grip part 11; a storage part 12; and a tension member grip part 13. The sheath grip part is configured to grip the sheath of the optical cable. The storage part has a cylindrical shape extending in a center axis direction of the optical cable, and is configured to store the plurality of optical fibers and tension members exposed from the sheath of the optical cable. The tension member grip part is detachably attached to the storage part, and is configured to grip the tension members stored in the storage part.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an optical cable fixing device.

Patent Document 1 discloses an information outlet system in which an optical fiber core wire of an optical fiber cable introduced in a splice box and an optical fiber core wire connected to a connector are fused and connected in the splice box. The end of the optical fiber cable is fixed to the inlet of the splice box by a cable clamp.

Japanese Patent Application Laid-Open No. 2003-149455

It is an object of the present disclosure to provide an optical cable fixing device applicable to a plurality of types of optical cables.

The optical cable fixing device of the present disclosure is
A fixing device for fixing an optical cable having a plurality of optical fibers, a tension member, and an outer cover to a fixed member.
An outer cover gripping portion that grips the outer cover of the optical cable,
A housing unit having a tubular shape extending in the central axis direction of the optical cable and accommodating the plurality of optical fibers exposed from the outer cover of the optical cable and the tension member.
A tension member gripping portion that is detachably attached to the accommodating portion and grips the tension member accommodated in the accommodating portion.
It is equipped with.

According to the present disclosure, it is possible to provide an optical cable fixing device applicable to a plurality of types of optical cables.

FIG. 1 is a perspective view showing a configuration of an optical cable fixing device according to an embodiment. FIG. 2 is an exploded perspective view of the fixing device. FIG. 3 is a view of the accommodating portion to which the tension member grip portion of FIG. 2 is attached as viewed from above. FIG. 4 is a perspective view showing an end portion of an optical cable fixed to a fixed member by a fixing device. FIG. 5 is a partially enlarged perspective view showing a state in which the end of the optical cable of FIG. 4 is fixed to the fixed member by a fixing device. FIG. 6A is a diagram showing a fiber exposure processing process at the end of an optical cable. FIG. 6B is a diagram showing a fiber exposure processing process at the end of an optical cable. FIG. 6C is a diagram showing a fiber exposure processing process at the end of an optical cable. FIG. 6D is a diagram showing a fiber exposure processing process at the end of the optical cable. FIG. 7A is a diagram showing a fiber protection processing process at the end of the optical cable. FIG. 7B is a diagram showing a fiber protection processing process at the end of the optical cable. FIG. 8A is a diagram showing a process of fixing the end of the optical cable to the fixed member. FIG. 8B is a diagram showing a process of fixing the end of the optical cable to the fixed member. FIG. 8C is a diagram showing a process of fixing the end of the optical cable to the fixed member. FIG. 8D is a diagram showing a process of fixing the end of the optical cable to the fixed member. FIG. 9 is a perspective view showing the end portion of another optical cable fixed to the fixed member by the fixing device. FIG. 10 is an exploded perspective view showing an accommodating portion to which the tension member grip portion corresponding to the optical cable of FIG. 9 is attached. FIG. 11 is a view of the accommodating portion to which the tension member grip portion of FIG. 10 is attached as viewed from above. FIG. 12 is a partially enlarged perspective view showing a state in which the end of the optical cable of FIG. 9 is fixed to the fixed member by the fixing device.

[Explanation of Embodiments of the present disclosure]
First, the contents of the embodiments of the present disclosure will be listed and described.
The optical cable fixing device of the present disclosure is
(1) A fixing device for fixing an optical cable having a plurality of optical fibers, a tension member, and a jacket to a fixed member.
An outer cover gripping portion that grips the outer cover of the optical cable,
A housing unit having a tubular shape extending in the central axis direction of the optical cable and accommodating the plurality of optical fibers exposed from the outer cover of the optical cable and the tension member.
A tension member gripping portion that is detachably attached to the accommodating portion and grips the tension member accommodated in the accommodating portion.
It is equipped with.

According to the above configuration, the tension member exposed from the outer cover of the optical cable is housed in the accommodating portion and gripped by the tension member gripping portion. The arrangement of tension members may differ depending on the type of optical cable. Since the tension member grip portion is detachably attached to the accommodating portion, the tension member grip portion can be replaced, for example, depending on the type of optical cable. As a result, the tension member can be gripped regardless of the type of optical cable. Therefore, the optical cable can be fixed to the fixed member while suppressing the optical cable from coming off the fixing device. That is, it is possible to provide an optical cable fixing device applicable to a plurality of types of optical cables.

(2) The optical cable fixing device includes a plurality of the tension member gripping portions.
Each of the plurality of tension member gripping portions has an insertion hole into which the tension member is inserted in the central axis direction of the optical cable.
The insertion hole may be located near the inner peripheral surface of the accommodating portion in a cross section orthogonal to the central axis direction of the optical cable.

According to the above configuration, the optical cable fixing device can be applied to an optical cable in which a tension member is arranged around the optical fiber.

(3) The tension member grip portion has an insertion hole into which the tension member is inserted in the central axis direction of the optical cable.
The insertion hole may be located at the center of the accommodating portion in a cross section orthogonal to the central axis direction of the optical cable.

According to the above configuration, the optical cable fixing device can be applied to an optical cable in which an optical fiber is arranged around a tension member.

(4) The tension member gripping portion may have a screw that is arranged so as to protrude inside the insertion hole.

According to the above configuration, the tension member can be fixed to the tension member gripping portion by bringing the screw into contact with the tension member inserted into the insertion hole.

(5) The accommodating portion may have a through hole penetrating the side surface of the accommodating portion in a direction intersecting the central axis direction of the optical cable.

According to the above configuration, for example, the screw can be brought into contact with the tension member by moving the screw in a direction approaching the tension member using a tool that has passed through a through hole from the outside of the fixing device.

(6) The outer cover grip portion and the accommodating portion are configured as separate bodies.
The accommodating portion includes a first end portion having a female screw portion formed on the inner peripheral surface, a second end portion having a male screw portion formed on the outer peripheral surface and located on the opposite side of the first one end portion. May have.

According to the above configuration, the accommodating portion is coupled to the outer gripped portion or the fixed member by a simple structure.

(7) The tension member grip portion may have a flat surface facing the outer cover grip portion.

According to the above configuration, for example, when the optical cable has a tube or slot for accommodating the optical fiber, the tube or slot exposed from the outer cover of the optical cable can be brought into contact with the tension member grip portion. As a result, it is possible to prevent the tube or slot of the optical cable from extending from the accommodating portion and projecting into the inside of the fixed member.

[Details of Embodiments of the present disclosure]
A specific example of the optical cable fixing device of the present disclosure will be described below with reference to the drawings. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

The expressions "top", "bottom", "left", "right", "front" and "rear" in the following description and drawings are used for convenience to facilitate understanding of the illustrated configuration. There is no intention to limit the direction or posture of the configuration during actual use.

(Optical cable fixing device 10)
The configuration of the optical cable fixing device 10 according to the embodiment will be described with reference to FIGS. 1 to 5. In FIG. 4, the tip of each optical fiber unit 303 is shown by a broken line. In FIG. 5, the optical fiber unit 303 housed in the slot groove 301A on the front side of the slot rod 301 is not shown.

The fixing device 10 shown in FIG. 1 is used, for example, to fix the optical cable 300 to the fixed member 500 (see FIG. 5). As illustrated in FIG. 4, the optical cable 300 has a slot rod 301, a plurality of tension members 302, a plurality of optical fiber units 303, a presser foot winding material 304, and a jacket 305. The slot rod 301 is made of a resin material such as plastic. On the outer peripheral surface of the slot rod 301, a plurality of slot grooves 301A for accommodating the optical fiber unit 303 are formed along the central axis CL1 direction of the optical cable 300. A plurality of tension members 302 are embedded in the central portion of the slot rod 301 along the central axis CL1 direction. The tension member 302 is formed of, for example, a metal wire, a fiber reinforced plastic wire, or the like.

The optical fiber unit 303 is composed of an aggregate of a plurality of optical fibers 303A. The plurality of optical fibers 303A may be an aggregate of single-core optical fibers, or may be a ribbon fiber in which a plurality of optical fibers are connected in a tape shape. The presser foot winding material 304 is wound around the slot rod 301. The outer cover 305 is formed so as to cover the outer periphery of the presser foot winding material 304.

The fixed member 500 shown in FIG. 5 is, for example, an optical connection box installed in a telephone office, a data center, or the like. When the optical cable 300 is fixed to the fixed member 500, a part of the outer cover 305 and the presser foot winding material 304 is removed as illustrated in FIG. The slot rod 301 and the tension member 302 exposed from the outer cover 305 are cut except for a part. The optical cable 300 is fixed to the optical junction box in a state where the optical fiber unit 303 exposed from the outer cover 305 is introduced into the optical junction box. The optical fiber 303A constituting the optical fiber unit 303 is fused and connected to another optical fiber in the optical junction box.

As illustrated in FIG. 1, the optical cable fixing device 10 includes an outer cover grip portion 11, an accommodating portion 12, a tension member grip portion 13, and a nut portion 14. In this example, the outer cover grip portion 11 and the accommodating portion 12 are configured as separate bodies.

The outer cover grip portion 11 is configured to grip the outer cover 305 of the optical cable 300 inserted inside (see FIG. 5). The outer cover grip portion 11 has, for example, a main body portion 111 and a cap portion 112, as illustrated in FIG. The main body portion 111 has a male screw portion 111A formed on the outer peripheral surface and a holding portion 111B. The pressing portion 111B has a cylindrical cushioning material and a plurality of strip portions arranged around the cushioning material. The cap portion 112 has a female screw portion 112A formed on the inner peripheral surface and a tapered portion 112B formed on the inner peripheral surface. The tapered portion 112B is formed so that the diameter becomes smaller toward the upper side. By screwing the female threaded portion 112A of the cap portion 112 into the male threaded portion 111A of the main body portion 111, the cap portion 112 is coupled to the main body portion 111. Further, the strip portion of the holding portion 111B of the main body portion 111 abuts on the tapered portion 112B of the cap portion 112 and falls inward in the radial direction, so that the outer cover 305 of the optical cable 300 is gripped.

In this example, the main body portion 111 has a male screw portion 111C formed on the outer peripheral surface at the lower end portion. The outer cover grip portion 11 may further have a seal member 113 (see FIG. 8A) that is inserted into the main body portion 111 and seals between the outer cover grip portion 11 and the outer cover 305 of the optical cable 300.

The accommodating portion 12 has a cylindrical shape extending in the vertical direction. In the accommodating portion 12, as illustrated in FIG. 5, the tension member 302 and the optical fiber unit 303 exposed from the outer cover 305 so that the central axis CL1 direction of the optical cable 300 is along the longitudinal direction of the accommodating portion 12. Is housed. The accommodating portion 12 is not limited to a cylindrical shape, and may have another cylindrical shape such as a polygonal cross section.

As illustrated in FIG. 2, the accommodating portion 12 has a female screw portion 121A formed on the inner peripheral surface at the upper end portion 121. By screwing the male screw portion 111C of the outer cover grip portion 11 to the female screw portion 121A of the accommodating portion 12, the outer cover grip portion 11 is coupled to the accommodating portion 12. The accommodating portion 12 has a male screw portion 122A formed on the outer peripheral surface at the lower end portion 122. With the fixed member 500 arranged between the accommodating portion 12 and the nut portion 14, the accommodating portion 12 is fixed to the fixed member 500 by screwing the nut portion 14 into the male screw portion 122A (FIG. 8A). , See Figure 8B). The upper end portion 121 is an example of the second end portion. The lower end portion 122 is an example of the first end portion.

The accommodating portion 12 has an opening 123 into which the tension member grip portion 13 is inserted. In this example, on the side surface of the accommodating portion 12, two openings 123 are provided at positions facing each other via the center C of the accommodating portion 12 (see FIG. 3). The opening 123 has a T-shaped cross-sectional shape orthogonal to the longitudinal direction of the accommodating portion 12, and attached portions 124 are formed on both sides of the opening 123.

The accommodating portion 12 may further have a through hole 125 penetrating the side surface of the accommodating portion 12 in a longitudinal direction of the accommodating portion 12, that is, a direction intersecting the central axis CL1 (see FIG. 5) of the optical cable. A tool for fixing the tension member 302 to the tension member gripping portion 13 can be inserted into the through hole 125. In this example, three through holes 125 are provided at positions facing the tension member gripping portion 13 on the side surface of the accommodating portion 12. Here, the "direction intersecting the central axis direction of the optical cable" is not limited to the "direction intersecting the central axis of the optical cable", but all "directions parallel to the plane intersecting the central axis of the optical cable". including.

The tension member gripping portion 13 is configured to grip the tension member 302 of the optical cable 300 illustrated in FIG. Specifically, the tension member grip portion 13 has an insertion portion 131, a support portion 132, and a mounting portion 133, as illustrated in FIG. The insertion portion 131 has an insertion hole 131A into which the tension member 302 is inserted. The support portion 132 extends from both sides of the insertion portion 131 and supports the insertion portion 131. The mounting portion 133 is provided at one end of the support portion 132.

The tension member grip portion 13 is inserted from the opening 123 of the accommodating portion 12 in the direction of the arrow in FIG. 2, and the insertion hole 131A is located at the center C of the accommodating portion 12 in a cross section orthogonal to the longitudinal direction of the accommodating portion 12. As such, it is arranged in the accommodating portion 12 (see FIG. 3). Then, the mounting portion 133 of the tension member gripping portion 13 is fixed to the mounted portion 124 of the accommodating portion 12 by a screw. When removing the tension member gripping portion 13 from the accommodating portion 12, the screw is removed from the mounting portion 133, and the tension member gripping portion 13 is moved in the direction opposite to the arrow in FIG. In this way, the tension member grip portion 13 is detachably attached to the accommodating portion 12. In the present specification, "the insertion hole 131A is located at the center of the accommodating portion 12" means that the inner diameter of the accommodating portion 12 (radius of the inner surface 12A) is r (see FIG. 3). May include being located in the region from the center C of the accommodating portion 12 to r / 2 in the radial direction.

The tension member grip portion 13 may further have a screw 134 projectably arranged inside the insertion hole 131A. For example, the insertion portion 131 is formed with a fixing hole 131B in a direction intersecting the insertion hole 131A. The screw 134 is inserted into the fixing hole 131B and is movably arranged in a direction intersecting the longitudinal direction of the accommodating portion 12. The tension member 302 is fixed to the insertion portion 131 by bringing the screw 134 into contact with the side surface of the tension member 302 inserted into the insertion hole 131A. For example, the through hole 125A of the accommodating portion 12 is provided at a position corresponding to the fixing hole 131B as illustrated in FIGS. 3 and 5, and the screw 134 is tensioned by the tool inserted from the through hole 125A. Move in the direction closer to 302. Screws are an example of screws.

The insertion portion 131 of the tension member grip portion 13 may have a flat upper surface 135. The slot rod 301 is in contact with the upper surface 135 of the insertion portion 131 (see FIG. 5). The upper surface 135 is an example of a flat surface facing the outer grip portion 11.

(Fixing method)
Next, a procedure for fixing the optical cable 300 to the fixed member 500 by the fixing device 10 will be described with reference to FIGS. 6A to 8D. 6A to 6D show a fiber exposure processing step at the end of the optical cable 300. 7A and 7B show a fiber protection process at the end of the optical cable 300. 8A to 8D show a process of fixing the end of the optical cable 300 to the fixed member 500.

First, as illustrated in FIGS. 6A to 6D, fiber exposure processing is performed at the end of the optical cable 300 fixed to the fixed member 500. Specifically, the outer cover 305 of the optical cable 300 illustrated in FIG. 6A is removed, and the presser foot winding material 304 is exposed as illustrated in FIG. 6B.

Subsequently, the presser foot winding material 304 exposed from the outer cover 305 is removed, and as illustrated in FIG. 6C, the optical fiber unit 303 taken out from the slot rod 301 is folded back to form an outer peripheral surface of the outer cover 305. Is temporarily fixed by the tape T.

Subsequently, as illustrated in FIG. 6D, the slot rod 301 exposed from the outer cover 305 is cut. The slot rod 301 whose tip is cut is in a state of protruding from the outer cover 305 by the length L. Further, the tip of the slot rod 301 is removed, and the tension member 302 is exposed from the slot rod 301.

Subsequently, the tape T is removed and the optical fiber unit 303 is returned to its original position. When an aggregate of a plurality of optical fibers 303A constituting each optical fiber unit 303 is not bundled by a bundle material or a tube, a protective tube 308 is provided in each optical fiber unit 303 as illustrated in FIG. 7A. It may be covered. The protective tube 308 protects the optical fiber unit 303 while facilitating the handling of the optical fiber unit 303. Then, as illustrated in FIG. 7B, the protective tube 308 is fixed to the outer cover 305 by winding the tape 309 around the root of the protective tube 308. This completes the fiber exposure process at the end of the optical cable 300 before it is inserted into the fixed member 500.

Next, as illustrated in FIGS. 8A to 8D, the end portion of the optical cable 300 treated as described above is fixed to the fixed member 500 by the fixing device 10. In FIGS. 8A to 8D, the optical fiber unit 303 exposed from the tube 308 is not shown.

First, the end portion of the optical cable 300 is inserted in the order of the outer cover grip portion 11 and the accommodating portion 12. The tension member grip portion 13 is attached to the accommodating portion 12, and the tension member 302 of the optical cable 300 is inserted into the insertion hole 131A of the tension member grip portion 13.

Subsequently, the tension member 302 is fixed to the tension member gripping portion 13. Specifically, the tool inserted from the through hole 125A moves the screw 134 previously inserted into the fixing hole 131B toward the tension member 302, and brings the screw 134 into contact with the side surface of the tension member 302.

Subsequently, the accommodating portion 12 is fixed to the fixed member 500. Specifically, as illustrated in FIG. 8A, the lower end 122 of the accommodating portion 12 is inserted into the opening of the fixed member 500. Then, the nut portion 14 is screwed into the lower end portion 122 of the accommodating portion 12 with the fixed member 500 sandwiched between the accommodating portion 12 and the nut portion 14.

Subsequently, the main body portion 111 of the outer cover grip portion 11 is coupled to the accommodating portion 12. Specifically, as illustrated in FIG. 8B, the main body 111 inserted through the optical cable 300 is moved toward the accommodating portion 12, and the main body 111 is screwed into the accommodating portion 12.

Subsequently, the cap portion 112 of the outer cover grip portion 11 is coupled to the main body portion 111. Specifically, as illustrated in FIG. 8C, the cap portion 112 inserted through the optical cable 300 is moved toward the main body portion 111, and the seal member 113 is inserted into the main body portion 111. , The cap portion 112 is screwed into the main body portion 111. The outer cover 305 of the optical cable 300 is gripped by the holding portion 111B. Thereby, as illustrated in FIG. 8D, the optical cable 300 is fixed to the fixed member 500.

As described above, according to the optical cable fixing device 10 of the present embodiment, the optical cable 300 is suppressed from being detached from the fixing device 10 by gripping the tension member 302 by the tension member gripping portion 13. Can be fixed to the fixed member 500.

(Modification example of tension member grip)
The optical cable fixing device 10 can be used, for example, to fix the optical cable 400 illustrated in FIG. 9 to the fixed member 500 by replacing the tension member gripping portion 13.

As illustrated in FIG. 9, the optical cable 400 has a cylindrical tube 401, a plurality of optical fibers 402, two tension members 403, and a jacket 404. The tube 401 is formed of a resin material such as a thermoplastic resin. The plurality of optical fibers 402 are housed in the tube 401. The plurality of optical fibers 402 may be bundled by a bundle material such as a resin tape along the central axis CL2 direction of the optical cable 400, for example. The jacket 404 is formed so as to cover the outside of the tube 401. Two tension members 403 are embedded in the outer cover 404 along the central axis CL2 direction at positions facing each other with the tube 401 in between. The tension member 403 is formed of, for example, a metal wire, a fiber reinforced plastic wire, or the like.

When the optical cable 400 is fixed to the fixed member 500, a part of the outer cover 404 is removed as illustrated in FIG. The tube 401 and tension member 403 exposed from the jacket 404 are cut leaving a portion. The optical cable 400 is fixed to the fixed member 500 in a state where the optical fiber 402 exposed from the outer cover 404 is introduced into the fixed member 500. The optical fiber 402 is fused and connected to another optical fiber in the fixed member 500.

In the accommodating portion 12, as illustrated in FIG. 12, an optical fiber 402 and a tension member 403 exposed from the outer cover 404 are provided so that the central axis CL2 direction of the optical cable 400 is along the longitudinal direction of the accommodating portion 12. Be housed.

As illustrated in FIG. 10, the optical cable fixing device 10 has two tension member gripping portions 23 instead of the tension member gripping portion 13. Each of the tension member gripping portions 23 is configured to grip the corresponding tension member 403.

Specifically, the tension member grip portion 23 has an insertion portion 231, a support portion 232, and a mounting portion 233. The insertion portion 231 has an insertion hole 231A into which the tension member 403 is inserted. The support portion 232 extends from one side of the insertion portion 231 and supports the insertion portion 231. The mounting portion 233 is provided at one end of the support portion 232.

The tension member grip portion 23 is inserted from the opening 123 of the accommodating portion 12 in the direction of the arrow in FIG. 10, and the inner peripheral surface 12A of the accommodating portion 12 in a cross section in which the insertion hole 231A is orthogonal to the longitudinal direction of the accommodating portion 12. It is arranged in the accommodating portion 12 so as to be located in the vicinity (see FIG. 11). Then, the mounting portion 233 of the tension member gripping portion 23 is fixed to the mounted portion 124 of the accommodating portion 12 by a screw. When removing the tension member gripping portion 23 from the accommodating portion 12, the screw is removed from the mounting portion 233, and the tension member gripping portion 23 is moved in the direction opposite to the arrow in FIG. In this way, the tension member grip portion 23 is detachably attached to the accommodating portion 12. In the present specification, "the insertion hole 231A is located near the inner peripheral surface 12A of the accommodating portion 12" means that the insertion hole 231A is radially r / 2 from the inner peripheral surface 12A of the accommodating portion 12. It may include being located in an annular region.

The tension member grip portion 23 may further have a screw 234 disposed so as to protrude inside the insertion hole 231A. For example, the insertion portion 231 is formed with a fixing hole 231B in the direction in which the insertion holes 231A intersect. The screw 234 is inserted into the fixing hole 231B and is movably arranged in a direction intersecting the longitudinal direction of the accommodating portion 12. The tension member 403 is fixed to the insertion portion 231 by bringing the screw 234 into contact with the side surface of the tension member 403 inserted into the insertion hole 231A. For example, the through hole 125B of the accommodating portion 12 is provided at a position corresponding to the fixing hole 231B as illustrated in FIGS. 11 and 12, and the screw 234 is tensioned by the tool inserted from the through hole 125B. Move in the direction closer to 403. Screws are an example of screws.

The insertion portion 231 of the tension member grip portion 23 may have a flat upper surface 235. The tube 401 is brought into contact with the upper surface 235 of the insertion portion 231 (see FIG. 12). The upper surface 235 is an example of a flat surface facing the outer grip portion 11.

As described above, according to the optical cable fixing device 10 of the present embodiment, the tension member gripping portion 13 and the tension member gripping portion 23 are detachably attached to the accommodating portion 12. Therefore, by attaching the tension member gripping portion 13 or the tension member gripping portion 23 corresponding to the type of the optical cable to the accommodating portion 12, the tension member 302 and the tension member 403 can be gripped regardless of the type of the optical cable. As a result, the optical cable 300 or the optical cable 400 can be fixed to the fixed member 500 while suppressing the optical cable 300 or the optical cable 400 from being detached from the fixing device 10. That is, the optical cable fixing device 10 can be applied to a plurality of types of optical cables.

In particular, in the present embodiment, the insertion hole 131A of the tension member gripping portion 13 is located at the center of the accommodating portion 12 in a cross section orthogonal to the central axis CL1 direction of the optical cable 300. Thereby, the optical cable fixing device 10 can be applied to the optical cable 300 in which the optical fiber 303A is arranged around the tension member 302.

On the other hand, the insertion hole 231A of the tension member gripping portion 23 is located near the inner peripheral surface 12A of the accommodating portion 12 in a cross section orthogonal to the central axis CL2 direction of the optical cable 400. Thereby, the optical cable fixing device 10 can be applied to the optical cable 400 in which the tension member 403 is arranged around the optical fiber 402.

Further, in the present embodiment, the tension member gripping portion 13 has a screw 134 arranged so as to protrude inside the insertion hole 131A. As a result, the tension member 302 can be fixed to the tension member gripping portion 13 by bringing the screw 134 into contact with the tension member 302 inserted through the insertion hole 131A. Similarly, the tension member grip portion 23 has a screw 234 disposed so as to protrude inside the insertion hole 231A. As a result, the tension member 403 can be fixed to the tension member gripping portion 23 by bringing the screw 234 into contact with the tension member 403 inserted through the insertion hole 231A.

Further, in the present embodiment, the accommodating portion 12 has a through hole 125 penetrating the side surface. The through hole 125 extends in a direction intersecting the longitudinal direction of the accommodating portion 12. As a result, the screw 134 can be brought into contact with the tension member 302 by moving the screw 134 in the direction approaching the tension member 302 using a tool inserted from the outside of the fixing device 10 through the through hole 125. Similarly, the screw 234 can be brought into contact with the tension member 403 by moving the screw 234 from the outside of the fixing device 10 in a direction approaching the tension member 403 using a tool.

Further, in the present embodiment, the outer cover grip portion 11 and the accommodating portion 12 are configured as separate bodies, and the accommodating portion 12 has an upper end portion 121 having a female screw portion 121A formed on the inner peripheral surface and an upper end portion. It is located on the opposite side of 121 and has a lower end portion 122 having a male screw portion 122A formed on the outer peripheral surface. Thereby, the accommodating portion 12 can be coupled to the outer cover grip portion 11 or the fixed member 500 by a simple structure.

Further, in the present embodiment, the insertion portion 131 of the tension member grip portion 13 has a flat upper surface 135. For example, even if the slot rod 301 further extends from the outer cover 404 due to an impact from the outside, the slot rod 301 abuts on the upper surface 135 of the insertion portion 131, so that the slot rod 301 is the fixed member 500. It is possible to suppress the protrusion to the inside of the.

Similarly, the insertion portion 231 of the tension member grip portion 23 has a flat upper surface 235. For example, even if the tube 401 further extends from the outer cover 404 due to a change in ambient temperature or the like, the tube 401 comes into contact with the upper surface 235 of the insertion portion 231 so that the tube 401 protrudes inside the fixed member 500. It can be suppressed.

Although the present invention 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 invention. Further, the number, position, shape and the like of the constituent members described above are not limited to the above-described embodiment, and can be changed to a number, position, shape and the like suitable for carrying out the present invention.

In the above embodiment, the outer cover grip portion 11 and the accommodating portion 12 are configured as separate bodies. However, for example, the main body portion 111 and the accommodating portion 12 of the outer cover grip portion 11 may be composed of a single member.

In the above embodiment, the optical cable 300 and the optical cable 400 are given as examples of the optical cable. However, the optical cable may be another type of optical cable. In this case, the shape and number of the tension member gripping portions attached to the accommodating portion 12 are changed according to the type of the optical cable.

In the above embodiment, the optical junction box is mentioned as an example of the fixed member 500. However, the fixed member 500 may be a module other than the optical junction box. Further, the fixed member 500 may be a member other than the module.

In the above embodiment, the optical cable fixing device 10 has a nut portion 14. However, when the lower end portion 122 of the accommodating portion 12 can be screwed into the fixed member 500, the optical cable fixing device 10 may be configured not to include the nut portion 14.

10: Fixing device
11: Outer grip portion 12: Accommodating portion 12A: Inner peripheral surface 13, 23: Tension member grip portion 14: Nut portion 111: Main body portion 111A: Male screw portion 111B: Holding portion 111C: Male screw portion 112: Cap portion 112A: Female screw Part 112B: Tapered part 113: Seal member 121: Upper end part 121A: Female threaded part 122: Lower end part 122A: Male threaded part 123: Opening part 124: Attached part 125, 125A, 125B: Through hole 131, 125B: Insertion part 131A, 231A: Insertion hole 131B, 231B: Fixing hole 132, 232: Support part 133, 233: Mounting part 134, 234: Screw 135, 235: Top surface 300: Optical cable 301: Slot rod 301A: Slot groove 302: Tension member 303: Optical Fiber unit 303A: Optical fiber 304: Presser winding material 305: Cover 306: Cover tear string 308: Protective tube 309: Tape 400: Optical cable 401: Tube 402: Optical fiber 403: Tension member 404: Cover 500: Fixed Member C: Central CL1: Central axis CL2: Central axis r: Inner diameter T: Tape

Claims (7)

A fixing device for fixing an optical cable having a plurality of optical fibers, a tension member, and an outer cover to a fixed member.
An outer cover gripping portion that grips the outer cover of the optical cable,
A housing unit having a tubular shape extending in the central axis direction of the optical cable and accommodating the plurality of optical fibers exposed from the outer cover of the optical cable and the tension member.
A tension member gripping portion that is detachably attached to the accommodating portion and grips the tension member accommodated in the accommodating portion.
Equipped with an optical cable fixing device. The optical cable fixing device includes a plurality of the tension member gripping portions.
Each of the plurality of tension member gripping portions has an insertion hole into which the tension member is inserted in the central axis direction of the optical cable.
The optical cable fixing device according to claim 1, wherein the insertion hole is located near the inner peripheral surface of the accommodating portion in a cross section orthogonal to the central axis direction of the optical cable. The tension member grip portion has an insertion hole into which the tension member is inserted in the direction of the central axis of the optical cable.
The optical cable fixing device according to claim 1, wherein the insertion hole is located at the center of the accommodating portion in a cross section orthogonal to the central axis direction of the optical cable. The optical cable fixing device according to claim 2 or 3, wherein the tension member grip portion has a screw disposed so as to project inside the insertion hole. The optical cable fixing device according to claim 4, wherein the accommodating portion has a through hole penetrating the side surface of the accommodating portion in a direction intersecting the central axis direction of the optical cable. The jacket grip portion and the accommodating portion are configured as separate bodies.
The accommodating portion has a first end portion having a male screw formed on the outer peripheral surface and a second end portion having a female screw formed on the inner peripheral surface, which is located on the opposite side of the first end portion. The optical cable fixing device according to any one of claims 1 to 5. The optical cable fixing device according to any one of claims 1 to 6, wherein the tension member grip portion has a plane facing the outer cover grip portion.

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