JP2005295749A - Closure for cable connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closure for a cable connector in which the insertion work of a drop cable can be easily performed and an existing drop cable does not cause the fault of the work in the case of the maintenance, the additional insertion or the removal of a branch cable, etc. <P>SOLUTION: In the closure 51 for housing and protecting the outer periphery of an optical cable connector 9 connecting the branch cable 5 or the drop cable 7 to a main cable 3, an end face plate 71 for blocking openings at both ends of a cylindrical casing 53 separates a plurality of cable inserting units 67 for the drop cable 7 from cable threading units 63, 65 for the main cable 3 and the branch cable 5, and disposes concentrically so as not to become concentric with respect to these cable threading units 63, 65. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a closure for a cable connection part, and more particularly to an improvement for improving workability such as connection and accommodation of a main cable and a branch cable or a drop cable within the closure.

6 to 9 show a conventional example of a cable connection portion closure that accommodates and protects an optical cable connection portion in which a branch cable or a drop cable is connected to a main cable.
The cable connection portion closure 1 is composed of a cylindrical case 11 that encloses the outer periphery of an optical cable connection portion 9 in which a branch cable 5 or a drop cable 7 is connected to a main cable 3.
In the cylindrical case 11, the open portions 11 a, 11 b at both ends of the cylindrical case 11 through which the cables 3, 5, 7 enter and exit are closed and the cables 3, 5, 7 introduced into the cylindrical case 11 are provided for each cable 3, 5, 7. An end face plate 21 in which the cable insertion portions 13, 15, and 17 are formed, and a cable holding bracket 37 that holds and fixes the cables 3, 5, and 7 that are inserted through the cable insertion portions 13, 15, and 17 in the cylindrical case 11, (See, for example, Patent Document 1).

  The cylindrical case 11 accommodates the optical cable connecting portion 9 as described above, and forms a cylindrical structure in which both ends are opened by the case main body 12a opened on one side and the cover 12b covering the open surface of the case main body 12a. doing. In the illustrated example, the cover 12b has one side edge 12c hinged to one open side edge of the case body 12a, and can be opened and closed as indicated by an arrow A in FIG. The other side edge 12d of the cover 12b is equipped with an elastic locking piece 12e that is locked to the engaging portion on the case body 12a side when the cover 12b is closed.

As shown in FIG. 7, the end face plate 21 includes, for example, one cable insertion portion 13 for inserting the main cable 3 and two cable insertion portions 15 for inserting the branch cable 5 in a vertical row. It is arranged.
The end face plate 21 is formed of a hard resin or metal and has an outer shell base 27 having an outer shell shape, and is attached to an inner peripheral portion of the outer shell base member 27 to provide the cable insertion portions 13, 15, and 17. Rubber seal plates 29, 30, and 31 are provided.
A plurality of cable insertion portions 17 for inserting the drop cable 7 are formed concentrically around the cable insertion portion 15 in the seal plates 30 and 31 that provide the cable insertion portion 15.

As shown in FIG. 7, the outer base material 27 and the seal plates 29, 30, and 31 constituting the end surface plate 21 have a vertical plane that passes through the centers of the cable insertion portions 13, 15, and 15 as a split surface 33. In addition, as shown in FIG. 8, the split surface 33 can be opened and closed in two.
Therefore, the outer base material 27 and the seal plates 29, 30, 31 can be easily attached to the cable insertion portions 13, 15, 15 by opening the end surface plate 21 at the split surface 33 as shown in FIG. The cables 3, 5 and 5 can be interrupted.

As shown in FIG. 7, the cable gripping bracket 37 is detachably mounted on a bracket mounting body 35 that is fixed to the case body 12a.
Three cable gripping brackets 37 can be mounted on the flange portion 35a extending in the vertical direction of the bracket mounting body 35 in accordance with the arrangement pitch of the cable insertion portions 13, 15 and 15 on the end face plate 21. Yes.

  The cable gripping bracket 37 is a pair of a substantially U-shaped clamp portion 41 that forms a cable gripping groove 38 through which an optical cable is inserted and a pair of arm portions 41a and 41a that are opposed to the clamp portion 41. The cable can be gripped and fixed by holding the cable inserted into the cable gripping groove 38 between the pair of demon screws 43, 43.

JP-A-11-262161

  By the way, as shown in FIG. 7, in the conventional end face plate 21 equipped with a plurality of cable insertion portions 17 for the drop cable 7 around the cable insertion portion 15 through which the branch cable 5 is inserted, As shown in FIG. 9, the front of the drop cable 7 inserted through the cable insertion portion 17 is covered with a clamp portion 41 and a pair of demon screws 43 and 43. For this reason, the clamp part 41 and the pair of demon screws 43, 43 obstruct the insertion work for drawing the drop cable 7 into the closure, reducing the workability during the insertion process of the drop cable 7, This also becomes an obstacle when the drop cable 7 is additionally connected.

  Further, when the installation of the plurality of drop cables 7 is completed, the branch cable 5 that is buried in the bundle of drop cables 7 has poor maintainability because the drop cable 7 becomes an obstacle. Further, when the end face plate 21 is opened by the split surface 33 for removing or adding the branch cable 5, the bundle of the existing drop cables 7 is pulled by the seal plates 30, 31 that are opened and closed by the split surface 33, and a large tension or Bending stress is applied, which may cause inconveniences such as damage to the drop cable 7.

The object of the present invention is that the cable gripping bracket does not interfere with the drop cable insertion work, and the existing drop cable does not interfere with the work even when the main cable or branch cable is maintained, additionally inserted, or removed. The object is to provide a closure for a cable connection.
Also, to provide a closure for a cable connection portion that can prevent damage to the drop cable without applying a large tension or bending stress to the bundle of existing drop cables when the end face plate is opened with a split surface. It is in.

  The closure for a cable connection part according to the present invention includes a cylindrical case, an end face plate in which a cable insertion part is formed for each cable introduced into the cylindrical case, and a cable inserted through the cable insertion part. A cable connection closure provided with a cable gripping bracket for gripping and fixing in the case. The cable insertion portion for the main cable and the branch cable in the end face plate is provided with a slot for opening the insertion portion when the cable is inserted. The end face plate is provided with a cable insertion portion for the drop cable for the main cable so that the main cable or the branch cable does not get in the way when the drop cable connected to the main cable is inserted. And the cable insertion part for the main cable and the branch cable. A position not part concentric with concentrated arrangement is allowed, characterized in that is.

  Further, in the cable connection portion closure according to the present invention, the end face plate is characterized in that the cable insertion portions for the main cable and the branch cable can be individually opened and closed by dedicated split surfaces, respectively. Good.

  Further, in the cable connection portion closure according to the present invention, the end face plate has a plurality of cable insertion portions for the drop cable arranged in the vicinity of a hinge coupling portion of a split surface with respect to the cable insertion portion for the main cable. It is good to be characterized.

  Furthermore, in the cable connection portion closure according to the present invention, the cable gripping bracket is at a plurality of positions shifted in the circumferential direction of the outer peripheral portion, and at each position corresponding to each cable insertion portion on the end face plate. It is preferable that a cable holding groove capable of holding a cable interrupted from the outside in the radial direction is formed.

  In the cable connection portion closure according to the present invention, the cable gripping metal fitting may be an integrally molded product in which each cable gripping groove is disposed on the same plane perpendicular to the insertion direction of each cable.

According to the cable connection portion closure of the present invention, the cable insertion portion provided on the end plate for the plurality of drop cables is separated from the cable insertion portion for the main cable and the branch cable, and for the main cable and the branch cable. It is centrally arranged at a position that is not concentric with the cable insertion portion.
Accordingly, the cable gripping fitting for the main cable or branch cable does not block the front of the cable insertion portion for the drop cable, and the plurality of drop cables do not surround the branch cable.
Therefore, the cable gripping bracket does not interfere with the drop cable insertion work, and the drop cable does not interfere with the work when the maintenance, additional insertion, or removal of the branch cable is performed. It is possible to improve the workability of the insertion work, maintenance work of optical cables such as branch cables, additional insertion and removal work.

  In addition, each cable insertion part for the main cable and branch cable can be opened and closed individually by a dedicated dividing surface, and further, near the hinge coupling part of the dividing surface in the cable insertion part for the main cable, If the configuration is such that a plurality of cable insertion sections are centrally arranged, large tension or bending stress is applied to the bundle of existing drop cables when opening the end plate with a split surface for maintenance, addition, or removal of branch cables. Without dropping, damage to the drop cable can be prevented.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of a cable connection portion closure according to the invention will be described in detail with reference to the drawings.
FIGS. 1 to 5 show an embodiment of a cable connection portion closure according to the present invention. FIG. 1 shows a state in which the cylindrical case of the cable connection portion closure according to the embodiment of the present invention is opened. 2 is an enlarged perspective view of part D in FIG. 1, FIG. 3 is a front view of the end face plate in FIG. 2, and FIG. 4 is a view of each cable insertion portion of the end face plate shown in FIG. FIG. 5 is a front view of the cable gripping metal fitting shown in FIG. 2.

  The cable connection portion closure 51 of this embodiment accommodates and protects the optical cable connection portion 9 for connecting the branch cable 5 and the drop cable 7 to the optical cable such as the main cable 3. The outer periphery of the optical cable connection portion 9 is protected. The cylindrical case 53 to be encapsulated and the open portions 53 a and 53 b at both ends of the cylindrical case 53 through which the cables 3, 5 and 7 enter and exit are closed in a water-tight state, and the cable 3 introduced into the cylindrical case 53. The end face plate 71 in which the cable insertion portions 63, 65, 67 are formed every 5, 7 and the cables 3, 5, 7 inserted through the cable insertion portions 63, 65, 67 are held and fixed in the cylindrical case 53. A cable gripping fitting 73 is provided.

  The cylindrical case 53 accommodates the optical cable connecting portion 9 as described above, and forms a cylindrical structure in which both ends are opened by the case main body 54 opened on one side and the cover 55 covering the open surface of the case main body 54. It is a thing. In the illustrated example, the cover 55 has one side edge 55a hinged to one open side edge of the case body 54 so that the cover 55 can be opened and closed. The other side edge 55b of the cover 55 is equipped with an elastic locking piece 55c that is locked to the engaging portion on the case body 54 side when the cover 55 is closed.

  As shown in FIG. 3, the end face plate 71 has, for example, one cable insertion portion 63 for inserting the main cable 3 disposed at a position closer to the lower portion on the central axis L1. Further, for example, the two cable insertion portions 65 and 65 for inserting the branch cable 5 are spaced apart from each other by a predetermined distance on both sides of the central axis L1 and positioned above the cable insertion portion 63 for the main cable. They are staggered.

  The end face plate 71 is formed of a hard resin or metal and has an outer shape of the outer shell 77, and is attached to the inner periphery of the outer shell base 77 to provide the cable insertion portions 63, 65, and 67. Rubber seal plates 79, 80, 80, 81 are provided.

The end face plate 71 of the present embodiment includes a plurality of cable insertion portions 67 for the drop cable, the main cable and the branch cable so that the main cable 3 or the branch cable 5 does not get in the way when the drop cable 7 is inserted. The central cable is centrally disposed at a position away from the cable insertion portions 63 and 65 for the main cable and the cable insertion portions 63 and 65 for the main cable and the branch cable.
In the case of the present embodiment, the region where the plurality of cable insertion portions 67 for drop cables are arranged is a region that is separated upward from the cable insertion portion 63 on the central axis L1.
Therefore, the figure connecting the centers of the four seal plates 79, 80, 80, 81 is a substantially rhombus.

As shown in FIGS. 3 and 4, the outer base material 77 and the seal plates 79, 80, 81 constituting the end face plate 71 have three vertical surfaces passing through the centers of the cable insertion portions 63, 65. Split surfaces 83, 84, 85 are formed, and one ends of the split surfaces 83, 84, 85 are hinge coupling portions 86a, 86b, 86c. As shown in FIG. 84 and 85 allow each insertion portion to be opened and closed.
In other words, the outer shell base material 77 is divided into four parts 77a, 77b, 77c, and 77d by the split surfaces 83, 84, and 85. The seal plate 79 is divided into two parts 79a and 79b by a split surface 83, and the seal plate 80 is divided into two parts 80a and 80b by a split surface 84 or 85.

  In the case of the present embodiment, the plurality of cable insertion portions 67 for the drop cable are arranged in the vicinity of the hinge coupling portion 86b of the split surface 83 with respect to the cable insertion portion 63 for the main cable. The seal plate 81 that provides the centrally arranged cable insertion portions 67 is integrated with the seal plate 79 and is divided into two by the same split surface 83 as the seal plate 79.

  As shown in FIG. 4, the end face plate 71 can be easily connected to the cable insertion portions 63, 65, and 65 by opening the outer base material 77 at the respective split surfaces 83, 84, and 85. , 5 and 5 can be interrupted.

  As shown in FIG. 2, the cable gripping metal fitting 73 includes a metal fitting body 74 that is fixed to the case main body 54 and a demon screw 43 that is screwed onto the metal fitting body 74.

The metal fitting body 74 is an integrally formed product by aluminum die casting or the like, and as shown in FIG. 5, the cable insertion portions 63 and 65 on the end face plate 71 at a plurality of positions shifted in the circumferential direction of the outer peripheral portion. , 67 are formed with cable gripping grooves 87, 88, 89 capable of gripping the cables 3, 5, 7 interrupted from the outside in the radial direction. Each of the cable gripping grooves 87, 88, 89 is a thick plate, and is open radially outward on the same plane perpendicular to the insertion direction of each cable and is radially distributed.

As shown in FIG. 5, the demon screw 43 for gripping the inserted cable is screwed and attached to gripping arm portions 74a that form the cable gripping grooves 87 and 88 facing each other. The cable is gripped by screwing in the direction of the arrow inside.
The cable gripping groove 89 for gripping the drop cable 7 is integrally formed with a metal molded body 74 and a resin molded product having a separate structure, and the position restricting plate 75 that locks the drop cable 7 in an aligned state by engaging the drop cable 7. Is formed by.

According to the cable connection portion closure 51 described above, the cable insertion portion 67 provided on the end face plate 71 for the plurality of drop cables 7 is connected to the main cable 3 and the branch as shown in FIGS. The cable 5 is centrally arranged at a position away from the cable insertion portions 63 and 65 for the cable 5 and not concentric with the cable insertion portions 63 and 65 for the main cable 3 and the branch cable 5.
Therefore, as shown in FIG. 2, the cable gripping metal fitting 73 does not block the front of the cable insertion portion 67 for the drop cable 7, and the plurality of drop cables 7 surround the branch cable 5. There is no enclosing.

  Therefore, the cable gripping metal fitting 73 does not interfere with the insertion work of the drop cable 7, and the existing drop cable 7 does not interfere with the work when the branch cable 5 is maintained, additionally inserted, or removed. The workability of the drop cable 7 insertion work and the maintenance work, additional insertion and removal work of the optical cable such as the branch cable 5 can be improved.

  In the present embodiment, the cable insertion portions 63 and 65 for the main cable 3 and the branch cable 5 can be individually opened and closed by dedicated split surfaces 83, 84, and 85, respectively. Since the plurality of cable insertion portions 67 for the drop cable 7 are concentrated in the vicinity of the hinge coupling portion 86b of the split surface 83, the end plate 71 is used for maintenance, addition, and removal of the cables 3 and 5. When the cut surface is opened, a large tension or bending stress is not applied to the bundle of the existing drop cables 7, and damage to the drop cables 7 can be prevented, and the work can be carried out safely and smoothly.

Further, in the case of the present embodiment, since the plurality of cable gripping grooves 87, 88, 89 provided in the cable gripping fitting 73 are open to the outside, the cables 3, 5, 7 are inserted therethrough. When removing or removing, other existing cables can be operated without obstructing.
Further, since the cable gripping bracket 73 has the above-described shape, it is easy to be integrally formed by die casting or the like, and the conventional cable gripping bracket 37 in which a plurality of clamp portions 41 are assembled on the bracket mounting body 35 (see FIG. 7 for all). ), The productivity of the cable gripping metal fitting 73 itself can be improved and the cost can be reduced.

  In addition, the number of equipment of the cable insertion portion 65 for the branch cable 5 exemplified in each of the embodiments described above, the number of equipment of the cable insertion portion 67 for the drop cable 7, and the specific shape of the metal fitting body 74 of the cable gripping fitting 73 The design can be changed as appropriate without departing from the spirit of the present invention.

It is a top view of the state which opened the cylindrical case of one Embodiment of the closure for cable connection parts which concerns on this invention. It is an expansion perspective view of the D section of FIG. FIG. 3 is a front view of the end face plate of FIG. 2. It is explanatory drawing of the state opened by the split surface of the end surface board shown in FIG. FIG. 3 is a front view of the cable gripping metal fitting shown in FIG. 2. It is a perspective view of the closure for the conventional cable connection part. It is an expansion perspective view of the B section of FIG. It is a perspective view of the state which opened the end surface plate used for the closure for cable connection parts of FIG. 6 by the split surface. It is C arrow line view of FIG.

Explanation of symbols

3 Main cable 5 Branch cable 7 Drop cable 9 Optical cable connection 43 Demon screw 51 Cable connection closure 53 Cylindrical case 54 Case body 55 Cover 63, 65, 67 Cable insertion part 71 End face plate 73 Cable gripping fitting 74 Metal fitting body 75 Position restriction plate 77 Outer base material 79, 80, 81 Seal plate 83, 84, 85 Split surface 86a, 86b, 86c Hinge coupling portion

Claims (5)

A cylindrical case, an end face plate in which a cable insertion portion is formed for each cable introduced into the cylindrical case, and a cable gripping bracket for holding and fixing the cable inserted through the cable insertion portion in the cylindrical case. A cable connection closure provided,
The cable insertion portion for the main cable and the branch cable in the end face plate is provided with a split surface that opens the insertion portion when the cable is inserted,
The end face plate has a cable insertion portion for the drop cable, and a cable for the main cable and the branch cable so that the main cable or the branch cable does not get in the way when the drop cable connected to the main cable is inserted. A closure for a cable connection part, wherein the closure for the cable connection part is concentrated at a position apart from the insertion part and not concentric with the cable insertion part for the main cable and the branch cable.   2. The cable connection portion closure according to claim 1, wherein the end face plate is configured such that the cable insertion portions for the main cable and the branch cable can be individually opened and closed by dedicated split surfaces. .   3. The end face plate according to claim 1, wherein a plurality of cable insertion portions for the drop cable are arranged in the vicinity of a hinge coupling portion of a split surface with respect to the cable insertion portion for the main cable. Closure for cable connection described in 1.   The cable gripping bracket can grip cables that are interrupted from the outside in the radial direction at a plurality of positions shifted in the circumferential direction of the outer peripheral portion and at positions corresponding to the cable insertion portions on the end face plate. The cable connection portion closure according to any one of claims 1 to 3, wherein a cable gripping groove is formed. The cable connection portion closure according to claim 4, wherein the cable gripping bracket is an integrally molded product in which each cable gripping groove is disposed on the same surface orthogonal to the insertion direction of each cable.