JP2012063373A - Protection instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protection instrument such that only when excessive tensile force is applied to an optical fiber feeder cable, the main optical fiber line is securely cut.SOLUTION: The protection instrument is attached to a crossing part in a method of fixing one end of a supporting line included in the optical fiber feeder cable branching off from a main line cable system to an outer wall of a building, and also leading the main optical fiber line separated from the supporting line into the building after winding the main optical fiber line to form the crossing part. The protection instrument has a main body part (51) which is inserted into a longitudinal hole (59) formed by combination, and a fixation part 60 which fixes the main body part (51) nearby the one end of the supporting line.

Description

  In the present invention, one end portion of a support line included in an optical fiber branch cable branched from a trunk cable system is fixed to an outer wall of a building, and an optical fiber main line separated from the support line is wound to give an intersection. The present invention relates to a protective device that is attached to the intersection of a method of drawing into a building afterwards.

  When the main fiber optic line is individually drawn into the building, the optical fiber branch cable is branched from the trunk cable system installed between the telephone poles, and one end of the support line made of steel wire etc. is included in the building. The optical fiber branch cable is installed in the air by being wound around and fixed to a fixture called an S metal fitting attached to the outer wall of the optical fiber. The optical fiber main line is separated from the support line at a position closer to the trunk cable system than the S metal fitting, fixed along the wall of the building, and drawn into the building.

  If you accidentally hook the optical fiber branch cable installed here, for example, if a truck loaded with luggage ignores the height limit and runs with the optical fiber branch cable, The S metal fittings come off the outer wall of the building and try to pull out the main optical fiber from the building at once. Even in such a case, in order not to affect the inside of the building, a weak part is given to the optical fiber main line from the S bracket to the inside of the building so as to be disconnected at the corresponding location. There was a construction method. Specifically, a high tension line such as a Kevlar line provided along the optical fiber so as to reinforce the tensile strength of the optical fiber in the optical fiber main line is removed, and a tensile force is applied to the optical fiber main line. Then, it will be preferentially cut off at that location and it will not affect the inside of the building.

  However, a special tool and labor are required for the formation of the weak body part, and a construction method capable of working more easily has been demanded.

  On the other hand, in patent document 1, it is tubular so that the optical fiber main line separated from the support line in front of the S metal fitting may be wound to give an intersection, and then drawn into the building, so as to surround the intersection. A construction method provided with protective equipment is disclosed. If the optical fiber branch cable is pulled in the direction of the trunk cable system and the S bracket is detached from the outer wall of the building, the radius of the wound part is rapidly reduced, and the main fiber optic cable is immediately applied to the tubular protective device. Wrap around. Thereby, the optical fiber main line together with the high tension line can be cut at the edge of the protective device. Since the optical fiber branch cable can be cut without forming the weak body portion, the drawing operation can be greatly simplified.

Japanese Patent No. 4367792

  In the protective device as described above, it is required that the optical fiber main line can be surely cut only when an excessive pulling force is applied to the optical fiber branch cable so that the S metal fitting is detached from the outer wall of the building. It is done. That is, when the optical fiber branch cable is swayed by the wind, the protective device should not have any influence on the optical fiber branch cable.

  The present invention has been made in view of the situation as described above. During normal times, the optical fiber branch cable is not affected at all. On the other hand, the excessive pulling that causes the S bracket to be detached from the outer wall of the building. It is an object of the present invention to provide a protective device capable of reliably cutting an optical fiber main line only when a force is applied to an optical fiber branch cable.

  The protective device according to the present invention crosses by fixing one end of a support line included in an optical fiber branch cable branched from a trunk cable system to an outer wall of a building and winding an optical fiber main line separated from the support line. A protective device to be attached to the intersection of the method of drawing into the interior of the building after being provided with a body, which can be combined to form a longitudinal hole and insert the intersection into the body, and the body And a fixing portion that fixes the support wire in the vicinity of the one end portion of the support wire.

  According to this invention, since the protector does not move relative to the support line of the optical fiber branch cable, an excessive pulling force that causes the S bracket to be detached from the outer wall of the building is applied to the optical fiber branch cable. Only for this, the optical fiber main line can be cut reliably. Further, since the protective device does not move substantially relative to the optical fiber main line, the optical fiber main line is not damaged.

  In the above-described invention, the fixing portions may be combined to surround the support line. According to this invention, the support wire can be surrounded and fixed simply by combining the fixing portions, so that the attachment can be simplified.

  In the invention described above, the fixing portion may be provided integrally with the main body portion, and may be combined to form the longitudinal hole and simultaneously surround the support line. According to this invention, the main body can be attached to the intersection of the optical fiber main line together with the fixing of the fixing part to the support line, and the protective device can be attached by a single operation, so the work can be simplified.

  In the above-described invention, the locking portion surrounding the support line of the fixed portion may be provided in parallel to the axis of the longitudinal hole. According to this invention, the protective device can be easily attached while maintaining the support wire and the optical fiber main wire in parallel. In addition, the optical fiber main line is not damaged.

It is a perspective view which shows the protector of the Example by this invention. It is a side view which shows the protector of the Example by this invention. It is a figure which shows the drawing-in form of the optical fiber main line to which the protector of the Example by this invention is applied. It is a perspective view which shows the principal part of FIG. It is a cross-sectional perspective view which shows the structure of an optical fiber branch line cable. It is a front view which shows the attachment form of the protector of the Example by this invention. It is a side view which shows the protector of the other Example by this invention. It is a front view which shows the attachment form of the protection instrument of the other Example by this invention. It is a perspective view which shows the protector of the other Example by this invention. It is a side view which shows the protector of the other Example by this invention. It is a side view which shows the protector of the other Example by this invention.

[Example 1]
One embodiment of a protective device according to the present invention will be described in detail with reference to FIGS.

  As shown in FIG. 1 or FIG. 2, the protective device 50 includes a main body 51 and a support wire fixing portion 60 and is an integrally molded body made of a flexible resin material such as hard plastic. The main body 51 is a substantially cylindrical tubular body, and a tube is cut along the longitudinal direction to expand the diameter by its flexibility, thereby forming an opening 52 that is separated in the circumferential direction. A plurality of ribs 53 are formed on the outer periphery of the main body 51 along the longitudinal direction, and are reinforced to prevent deformation of the main body 51 in the longitudinal direction. Edges 54 are provided along the circumferential direction at both ends in the longitudinal direction of the main body 51.

  A claw 55 and a hook 56 that can be engaged with each other across the opening 52 are provided on the outer peripheral surface of the main body 51. The claw 55 is provided along the opening 52 so as to protrude outward from the outer peripheral surface of the main body 51. The hook 56 has a hook-like portion 57 facing the inside of the main body 51. When a force is applied to the main body 51 so as to close the opening 52, the claw 55 is positioned in the hook-like portion 57. The claw 55 and the hook 56 are engaged. In such an engaged state, the main body 51 maintains the obstruction of the opening 52 and forms a longitudinal hole 59 that penetrates the main body 51 in the longitudinal direction. In the vicinity of the claw 55, a presser plate 58 is provided, and once the claw 55 and the hook 56 are engaged, this state cannot be easily released. That is, the presser plate 58 extends along the outer peripheral surface of the main body 51 so as to cover the claw 55 at a position separated from the claw 55 by a distance that does not hinder the hook 56 from being locked to the claw 55. ing.

  The support wire fixing portion 60 shares a connection portion to the main body 51 with the presser plate 58 and extends further outward from the presser plate 58. The support wire fixing portion 60 includes a fixing block 61 and a rotation block 62. At the tip of the support wire fixing portion 60, there is a bent portion 63 that connects the fixing block 61 and the rotating block 62, so that the rotating block 62 rotates so as to be combined with the fixed block 61. . Nipping grooves 64 a and 64 b extending along the longitudinal direction of the main body 51 are provided in the vicinity of the bent portions 63 on the surfaces of the fixed block 61 and the rotating block 62 facing each other. Further, the base of the fixed block 61, that is, the rotation block 62 in the vicinity of the presser plate 58 is provided with a fixed-side locking claw 65 protruding in a direction orthogonal to the extending direction of the support line fixing portion 60. Further, a rotation-side locking claw 66 that can be locked to the fixed-side locking claw 65 by rotation of the rotation block 62 is provided at the end of the rotation block 62 opposite to the bent portion 63. Accordingly, the rotation block 62 can be rotated and combined with the fixed block 61, and the linear body can be sandwiched and fixed between the holding grooves 64a and 64b.

  Next, the drawing-in form of the optical fiber branch cable used by the protective device 50 into the building and the method of using the protective device 50 will be described with reference to FIGS.

  As shown in FIG. 3, the branch cable 10 branched from the trunk cable system (not shown) of the optical communication network is connected to a home or the like through a predetermined branch device such as a utility pole 35 and a closure 36 installed on the utility pole 35. Delivered toward the outer wall 20 of the building.

  Referring also to FIG. 4, the branch cable 10 is an optical fiber cable also called IF drop. The optical fiber main line 11 for optical communication and the overhead line of the optical fiber main line 11 associated with the main line can be easily made. And a support line 12 for stabilizing or reinforcing the installation state of the fiber cable. In FIG. 4, the optical fiber main line 11 is indicated by a white line, and the support line 12 is indicated by a black line.

  As shown in FIG. 5, in the branch cable 10, the optical fiber main line 11 and the support line 12 associated therewith are coupled by a connecting part (neck part) 100 with their side parts facing each other. The optical fiber main line 11 includes an optical fiber 110 disposed in the center, a pair of high-strength body wires 111 arranged at predetermined intervals on both sides of the cord, and a sheath 112 covering the whole. The high-tension body wire 111 is also called a tension member, and is a thin line made of synthetic resin for reinforcing against tension such as G-FRP and K-FRP. The sheath 112 is formed of a thermoplastic resin, and a pair of opposed V grooves 11v formed along the optical fiber 110 between one and the other of the high-tensile body wires 111 is formed on the outer surface thereof. . Using the V groove 11v, the optical fiber 110 is stripped from the sheath 112.

  The optical fiber 110 includes an optical fiber core wire 11a, a high-tensile fiber 11b that covers the optical fiber core wire 11a, and a flame-retardant sheath 11c that is formed of polyethylene or the like that covers the fiber.

  The support wire 12 includes a support core wire 120 and a sheath 121 that covers the core wire, and is coupled to the main wire 11 via the connecting portion 100 so as to face one high-tensile body wire 111. The sheath 121 is preferably formed of the same material as the sheath 112 of the main line 11, and more preferably formed integrally with the sheath 112 and the connecting portion 100. The core wire 120 of the support wire 12 is preferably formed of a plastic material having higher rigidity than the main wire 11, for example, a steel material.

  The main line 11 and the support line 12 can be separated by cutting the connecting part 100 having a relatively small strength in the longitudinal direction. In FIG. 5, the connecting portion 100 is depicted as a substantially flat extending portion having a thickness of about one-fifth of the sheaths 112 and 121, but may be appropriately sized and shaped as appropriate.

  Referring again to FIG. 4, the branch cable 10 branched from the trunk cable system is first fixed by the main fixing portion 30 to the outer wall 20 which is the outer shape portion of the building into which the cable is to be drawn. One end of the support wire separated from the branch cable 10 is wound around an S metal fitting 31 described later and fixed to the main fixing portion 30. The main fixing portion 30 is fixed to the outer wall 20 while holding the S fitting 31 and a so-called S fitting 31 as a retractable fitting capable of adjusting the length of the support wire 12 by winding the support wire 12. And a so-called C metal fitting 33 which is a fixture. The S metal fitting 31 is further provided with a hooking loop 32, and the C metal fitting 33 is provided with a hook portion 34 that hooks and stops the hooking loop 32 from above.

  A sub-fixing portion 41 is provided on the cable inlet 21 side between the main fixing portion 30 and the cable inlet 21 formed in the outer wall 20. In the present embodiment, the sub-fixing portion 41 is constituted by a so-called wiring cleat that can pinch and hold the branch cable 10 by a clamping structure and fix it to the outer wall 20. Between the sub-fixing portion 41 and the main fixing portion 30, the branch cable 10 is handed over mainly with only the main line 11 remaining. A protective tape 13 is wound around the end of an unseparated portion adjacent to the separation point between the main line 11 and the support line 12 so that unnecessary separation between the main line 11 and the support line 12 does not proceed. .

  Here, as shown in FIG. 4 in particular, the protective device 50 is fixed in the vicinity of one end portion of the support wire 12 fixed to the main fixing portion 30. That is, the protective device 50 is fixed between the position where the support wire 12 is wound around the S metal fitting 31 of the main fixing portion 30 and the position where the main wire 11 and the support wire 12 are separated. Referring to FIGS. 6 and 2 together, the support line 12 is surrounded by the holding grooves 64 a and 64 b provided in the support line fixing portion 60, and is rotated to the fixed side locking claw 65. The protective device 50 is fixed by the locking claw 66 being locked. Since the holding grooves 64a and 64b are substantially parallel to the central axis of the longitudinal hole 59, the support line 12 is also fixed substantially parallel thereto.

  Further, at a position close to the position where the protective device 50 is fixed, the main line 11 is wound to form a loop portion 11r. In the present embodiment, the number of cable turns of the loop portion 11r is one. The intersection 11c of the main line 11 obtained by such winding is loosely inserted into the longitudinal hole 59 and held. The opening 52 is closed after guiding the main line 11 into the longitudinal hole 59. Such occlusion is maintained by locking the hook 56 to the claw 55. In addition, in order to guide the main line 11 to the inside of the main body 51 and hold the crossing portion 11c in the loosely inserted state as described above, the opening 52 is wide enough to guide the main line 11 to the inside in the opened state. Have Further, the longitudinal hole 59 has a cross section that is wide enough to loosely insert at least two main wires 11 therein.

  The protective device 50 is an indoor system protection component when subjected to abnormal tension, and includes an edge 54 having a cable cutting function. Abnormal tension is, for example, when the support wire 12 is detached from the main fixing portion 30 due to an excessive pulling force applied to the branch cable 10 such as being hooked on a truck loaded with luggage while ignoring the height restriction. I mean.

  When the branch cable 10 is pulled abnormally and pulled in the direction of the trunk cable system, the main line 11 is wound around the main body 51 with a small curvature by reducing the diameter of the loop portion 11r. Further, the pulled main line 11 is cut at a position where it abuts against the edge 54 by applying a significant shear force. As a result, the pulling of the branch cable 10 hardly affects the inside of the building. In the present embodiment, since the auxiliary fixing portion 41 is provided, the possibility of affecting the inside of the building can be further reduced. In this way, the protective device 50 protects the indoor system.

  The protective device 50 can cut the main wire 11 together with the high-tensile body wire 111 at the corner portion without giving the edge 54 just by cutting off the tubular end portion of the main body 51. An acute angle is more preferable. In addition, since the main body 51 is reinforced by the ribs 53, the main line 11 is securely cut while preventing the deformation in the longitudinal direction even in a state where the shearing force is applied as described above. It is thinly formed so that it can be easily closed, that is, easily bent in the circumferential direction.

  The protective device 50 is attached to the intersecting portion 11c in a simple form in which the support wire 12 is sandwiched and the loop portion 11r is inserted. The attachment to the support line 12 can be performed only by a simple manual operation of combining the fixed block 61 and the rotation block 62 and holding the support line 12 in the holding grooves 64a and 64b. Further, the maintenance of the closed state of the opening 52, that is, the prevention of the main line 11 from falling off from the protective device 50 can also be performed by a simple manual operation of locking the hook 56 to the claw 55. That is, no special tool is required for the cable winding operation and the attachment of the protective device 50, and only manual operation is required. Furthermore, it is not necessary to separate the main line 11 into the optical fiber 110 and other parts, and an expensive tool is not used. Therefore, the entire installation work of the protective device 50 can be easily performed.

  Further, since the protective device 50 is fixed to the support wire 12, it does not move relative to the branch cable 10 even when it is blown by wind, for example. Furthermore, since the protective device 50 accommodates the crossing portion, the relative positional relationship with the loop portion 11r is not greatly moved, and thus the main line 11 is not damaged. Further, the support line surrounded so as to be sandwiched by the sandwiching grooves 64 a and 64 b is substantially parallel to the central axis of the longitudinal hole 59. Therefore, the main line 11 separated from the support line 12 can be easily inserted into the longitudinal hole 59 by simply winding the main line 11 in a certain direction, and the main line 11 is not pressed against the edge 54. This also prevents the main line 11 from being damaged during normal operation.

[Example 2]
A protective device according to another embodiment of the present invention will be described in detail with reference to FIG.

  As shown in FIG. 7, the protective instrument 70 includes main bodies 71a and 71b (71) and support wire fixing portions 72a and 72b (72). The main bodies 71a and 71b each have a shape obtained by dividing a cylindrical shape into halves by a plane passing through the central axis thereof, and can be combined with each other to form a substantially cylindrical shape. Support line fixing portions 72a and 72b are provided on the outer surfaces of the main bodies 71a and 71b, respectively. A bent portion 73 having a rotation axis substantially parallel to the above-described central axis is provided at the end of the support line fixing portion 72 opposite to the main body 71, so that the support line fixing portions 72a and 72b can rotate with respect to each other. It is connected to the. That is, the main bodies 71 a and 71 b can also rotate with respect to each other about the rotation axis of the bent portion 73. When the support wire fixing portions 72a and 72b are rotated and closed so as to be in close contact with each other, the main bodies 71a and 71b are also in close contact with each other to form the substantially cylindrical shape described above, and the inner peripheral surface thereof forms a longitudinal hole 79.

  The main body 71 includes edges 75 at both ends in the longitudinal direction, that is, the direction along the rotation axis direction of the bent portion 73. Similar to the first embodiment, the cross-sectional shape of the edge 75 is preferably a right angle or an acute angle. The main body 71a includes a hook 76 extending in the longitudinal direction in the vicinity of the end opposite to the bent portion 73, and the main body 71b includes a groove 77 in the vicinity of the end opposite to the bent portion 73. When the main bodies 71a and 71b are combined with each other, the hook 76 is retained in the groove 77 by receiving the tip thereof, and the main bodies 71a and 71b can be fixed to each other. As a result, the support wire fixing portions 72a and 72b are also fixed in a state where the surfaces facing each other are in close contact with each other.

  The support line fixing portions 72a and 72b have holding grooves 74a and 74b extending in the longitudinal direction in the vicinity of the bent portions 73 on the surfaces facing each other. When the support wire 12 is enclosed between the holding grooves 74 a and 74 b so as to be held, and the hook 76 is locked to the groove 77, the protective device 70 can be fixed to the support wire 12.

  Next, the usage method of the protective device 70 is demonstrated using FIG.4, FIG.7 and FIG.8. In addition, since the drawing-in form to the building of the optical fiber branch line cable in which the protective instrument 70 is used is the same as that in the first embodiment, the description is omitted.

  Referring to FIG. 4, the protective device 70 is fixed in the vicinity of one end portion of the support wire 12 as in the first embodiment. Referring to FIGS. 7 and 8 together, the support wire 12 is surrounded by the holding grooves 74 a and 74 b provided in the support wire fixing portion 72, and is protected by the hook 76 engaging with the groove 77. Fixed to the instrument 70. The holding grooves 74a and 74b extend along the axial direction of the longitudinal hole 79, and the support line 12 is also fixed substantially parallel thereto.

  Further, the main line 11 is wound to form a loop portion 11r at a position close to the position where the protective device 70 is fixed. The intersecting portion 11c of the main line 11 obtained by such winding is loosely inserted and held in a longitudinal hole 79 formed by combining the main bodies 71a and 71b of the protective device 70 with each other. Such holding is performed simultaneously with the holding of the support line 12 by engaging the hook 56 with the claw 55. Thereby, dropping off of the main line 11 from the protective device 70 can be prevented. The longitudinal hole 79 has a cross section that is wide enough to loosely insert at least two main wires 11 therein.

  Similarly to the first embodiment, the protective device 70 is cut at a position where the main line 11 contacts the edge 75 when an abnormal tension is applied to the branch cable 10 and pulled in the direction of the trunk cable system, and the indoor system Is protected.

  Similarly to the first embodiment, the protective device 70 is attached to the intersecting portion 11c in a simple form in which the support wire 12 is sandwiched and the loop portion 11r is inserted. Furthermore, the hook 76 can be locked to the groove 77 and can be attached to the crossing portion 11c together with the fixing to the support line 12, thereby simplifying the attaching operation.

[Example 3-1]
A protective device according to still another embodiment of the present invention will be described with reference to FIGS. 9 and 10.

  As shown in FIG. 9, the protective device 80 includes main bodies 81a and 81b (81), a support line fixing portion 82, and support line pressing portions 90a and 90b. The main bodies 81a and 81b have a shape in which a cylindrical shape is divided by two cut surfaces. That is, similarly to the protective device 70 of the second embodiment, the main bodies 81a and 81b are combined with each other to form a substantially cylindrical shape, and the inner peripheral surface thereof forms a longitudinal hole 89 (see FIG. 10). Of the two cut surfaces, the cut surface A close to the support wire fixing portion 82 is provided with a convex portion 88a on the main body 81a side and a concave portion 88b on the main body 81b side. When the main bodies 81a and 81b are combined, the convex portion 88a fits into the concave portion 88b, thereby preventing the main body 81a and the main body 81b from being displaced in the radial direction. Two sets of hooks 86 and grooves 87 similar to those in the second embodiment are provided in the vicinity of the cut surface B far from the support wire fixing portion 82, and can be fixed to each other when the main bodies 81a and 81b are combined. . The main bodies 81a and 81b are provided with edges 85 at both ends in the longitudinal direction as in the second embodiment.

  A support line presser 90a having a substantially triangular prism shape extending along the cut surface A is fixed to the main body 81a. The support line pressing part 90a is connected to a columnar support line fixing part 82 extending substantially in parallel with the support line pressing part 90a by a bent part 83a. Therefore, the main body 81a is also rotatable with respect to the support line fixing portion 82. Similarly, the support wire pressing portion 90b and the main body 81b are connected to the support wire fixing portion 82 by a bent portion 83b. The support line fixing part 82 has a support line fixing groove 84 extending along the center of the bent parts 83a and 83b. The support line fixing groove 84 is opened between the support line pressing portions 90a and 90b, and a plurality of protrusions 84 'protruding toward each other are alternately arranged at predetermined intervals on both side surfaces of the support line fixing groove 84. Are lined up.

  Here, referring to FIG. 10, the support line 12 can be pushed into the support line fixing groove 84 with, for example, a finger so as to bend the support line 12 along the apexes of the protrusions 84 ′ arranged alternately. Therefore, the protective device 80 can be temporarily fixed to the support line 12 even if the support line pressing portions 90a and 90b are open to each other. Further, the temporarily fixed protective device 80 can be easily removed. Thereby, workability | operativity of attachment of the protective instrument 80 can be improved. Further, when the hooks 86 are engaged with the grooves 87 and the main bodies 81a and 81b are fixed to each other, the support line 12 is surrounded and supported by the support line fixing part 82 and the support line pressing parts 90a and 90b. That is, the support line 12 is enclosed. At this time, the support wire pressing portions 90 a and 90 b both press the support wire 12 pushed into the support wire fixing groove 84 further toward the support wire fixing groove 84. Thereby, the protective device 80 can be firmly fixed to the support wire 12. Further, since the support line 12 is bent by the protrusion 84 ′ and cannot be moved in the longitudinal direction of the support line fixing groove 84, the protection instrument 80 can be prevented from moving in the longitudinal direction.

[Example 3-2]
The present embodiment is substantially the same as the embodiment 3-1, and is different from the embodiment 3-1 in that the number of divisions of the main body is 3. The different parts will be described with reference to FIG.

  As shown in FIG. 11, the protective device 80 ′ includes main bodies 81 a, 81 b ′, and 81 c (81 ′) each having a cylindrical shape divided into three. The main body 81c is connected to the main body 81b 'by a bent portion 83c so as to be rotatable. Thereby, the protective device 80 'can easily loosely insert the intersecting portion 11c of the main wire 11 into the longitudinal hole by opening the main body 81c without opening the support wire pressing portions 90a and 90b greatly. This improves the workability in attaching the protective device.

  In the above embodiment, the number of turns of the cable of the loop portion 11r is 1, but it may be 2 or more. Of course, the details of the cable are not necessarily limited to those described with reference to FIG. It is.

  As mentioned above, although the typical Example by this invention and the modification based on this were demonstrated, this invention is not necessarily limited to these, Those skilled in the art do not deviate from the scope of the attached claim. Various alternative embodiments and modifications can be found.

DESCRIPTION OF SYMBOLS 10 Branch line cable 11 Main line 11r Loop part 12 Support line 20 Outer wall 21 Lead-in port 30 Main fixing part 41 Sub fixing part 50, 70, 80, 80 'Protection instrument 51, 71, 81, 81' Main body 59, 79, 89 Longitudinal hole 60, 72, 82 Support wire fixing part

Claims (4)

One end of the support line included in the optical fiber branch cable branched from the main cable system is fixed to the outer wall of the building, and the optical fiber main line separated from the support line is wound to give an intersection, and then the building A protective device attached to the intersection of the method of drawing into the interior of the
A protective device comprising: a main body portion that can be combined to form a longitudinal hole and into which the intersecting portion can be inserted; and a fixing portion that fixes the main body portion near the one end portion of the support wire.   The protective device according to claim 1, wherein the fixing portion is combined to surround the support line.   The protective device according to claim 2, wherein the fixing portion is provided integrally with the main body portion and is combined to form the longitudinal hole and at the same time surround the support line.   The protection device according to claim 2 or 3, wherein a locking portion surrounding the support line of the fixing portion is provided in parallel with an axis of the longitudinal hole.