JP4152045B2 - Passing core wire storage type optical communication cable closure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a closure for an optical communication cable that houses a passing core wire (passing type optical cable) in which a cable entrance / exit is concentrated on one side.
[0002]
[Prior art]
A conventional optical fiber cable closure of a passing core wire storage type has a structure in which cable entrances are arranged at both ends along the cable passing direction.
[0003]
[Problems to be solved by the invention]
However, depending on the application, for example, when laying optical cables on railroad tracks, due to site restrictions and maintenance management reasons, the cable entrance / exit is concentrated only on one end rather than the conventional closures on both ends. In some cases, it was more convenient to use a closed closure. Accordingly, an object of the present invention is to propose a closure for an optical communication cable of a passing core wire storage type in which the entrance and exit of the cable are concentrated on one side.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that an end plate having an outer circular shape and having an optical cable insertion portion through which a passing optical cable and a branching optical cable are inserted is formed on one side of the end plate. A plurality of fusion trays formed so as to be freely inserted and removed in a direction intersecting with the central axis direction of the end plate, and an optical cable storage portion for storing a connection portion and an extra length portion of the optical cable in the fusion tray; A bottomed cylinder in which the optical cable housing portion is housed, a cover having an opening end portion formed with a flange having substantially the same diameter as the end plate, and a flange member of the cover interposed between the end plate and a sealing material. Cover the outer periphery with a ring cover with a U-shaped cross section, and then tighten the ring cover in the circumferential direction to close the cover and the end. An integration means for integrating the rate, and a work tray configured to be foldable by connecting two plates with a hinge, and one plate of the work tray is connected to the optical cable or has an extra length is inserted into the space after pulling out the fusion tray from the optical cable housing section during settlement work, also, the other plate of the work tray is characterized in that so as to be found mounting work target fusion tray.
[0005]
The invention of claim 2 is characterized in that, in the invention of claim 1, a holder for storing a working tray when not in use is provided in the optical cable housing portion .
[0006]
According to a third aspect of the present invention, in the first or second aspect of the invention, the portion of the optical cable insertion portion through which the pair of pass-through optical cables are inserted covers a cylindrical end face rubber packing with slits on both optical cables, and the outside After the cable clip is sandwiched between the two cable clips, the cable clip is integrated by using a fastening means, and then the cable clip is brought into contact with the insertion hole portion of the end plate through a sealing material, and then the fixing means is used. The cable clip is fixed to the end plate .
[0007]
According to a fourth aspect of the present invention, in the first, second, or third aspect of the invention, a portion of the optical cable insertion portion through which the branching optical cable other than the passing core wire is inserted covers the optical cable with a cylindrical end rubber packing, And one end face is supported by the cable blank bracket, the cable blank bracket is brought into contact with the insertion hole portion of the end plate through a sealant, and then the cable blank bracket is fixed to the end plate by using a fixing means. It is characterized by that.
[0008]
According to a fifth aspect of the present invention, in the first, second, third , or fourth aspect of the invention, two gripping plates that sandwich the optical cable inside the end plate from both sides through the optical cable insertion portion, and these two gripping plates 2 and a long hole bracket connected to both sides of one gripping plate, and is held movably by changing the mounting position of the long hole bracket with respect to the end plate. Thus, a branch cable gripping metal fitting that functions as a guide mechanism for guiding the optical cable in the long axis direction of the long hole bracket is provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of an embodiment of a closure according to the present invention, and FIG. 2 is an enlarged view of a main part of FIG. In the figure, reference numeral 1 denotes an end plate, and through-type optical cables 2 and 3 and other branching optical cables 4 to 7 are inserted and held inside. On the back side of the end plate 1, a storage portion 8 that stores an extra length portion of the optical cable is formed. The storage portion 8 is covered with a cover 9 made of a bottomed cylinder. The cover 9 is brought into contact with the end plate 1 via the cover seal packing 11, and is fixed to the end plate 1 by covering the periphery thereof with the cover rings 12 </ b> A and 12 </ b> B.
[0012]
FIG. 3 is an exploded perspective view showing each member used when the optical cables 2 to 7 are inserted and fixed to the end plate 1. FIG. 4 is an exploded perspective view showing a part of FIG. 3 further exploded. Here, a holding structure for the pass-type optical cables 2 and 3 will be described with reference to FIGS. 3 and 4. In FIG. 4, the end-type rubber packing 13 with slits is put on the pass-type optical cables 2 and 3 and sandwiched between the two cable clips 14A and 14B. The cable clips 14A and 14B are formed in a state in which two cylinders that house the end face rubber packing 13 are arranged in a state of being assembled with each other, and a flange portion 14a is formed in a plane that intersects the axial direction on the outer side. A mounting hole 14b is formed in the outer peripheral portion of the flange portion 14a.
[0013]
By tightening the combined cable clips 14A and 14B with a bolt 15, the optical cables 2 and 3 are held in an airtight manner by the cable clips 14A and 14B. Next, the optical cables 2 and 3 (not shown) are pushed into the jade-shaped cable insertion holes 16 formed in the lower part of the end plate 1 of FIG. A wider mounting groove is formed around the front side in the hole 16, and the cable clip 14 is mounted while the seal tape 17 is inserted therein. Next, the flange portion 14a is screwed in a state of being in contact with the end plate 1, and the holding of the optical cables 2 and 3 is finished. As a result, the cables 2 and 3 for passing light are kept airtight with respect to the end plate 1.
[0014]
Next, the holding structure for the branching optical cables 4 to 7 will be described. In FIG. 3, a stepped hole 18 having a narrow back is formed in a portion of the end plate 1 through which the optical cable 5 is inserted, and a sealing tape is inserted while the cable 5 (not shown) is inserted therein. 19, end face rubber packing 21 and cable blank bracket 22 are mounted in this order, screwed in a state where bracket 22 is in contact with end plate 1, and holding of cable 5 is completed. Thereby, the optical cable 5 is kept airtight with respect to the end plate 1. The other optical cables 4, 6, and 7 are held in the same procedure. The bracket 22 is formed with a hole through which the cable 5 passes in the center, and is formed in a shape that presses the end surface and outer periphery of the end surface rubber packing 21 at the peripheral portion, and further, three legs 22a and attachment holes 22b are formed on the outer side. Is formed.
Here, the cable insertion hole 16, the end surface rubber packing 13, the cable clips 14A and 14B, the seal tape 17, the stepped hole 18, the seal tape 19, the end surface rubber packing 21, the bracket 22 and the like constitute the optical cable insertion portion in the claims. is doing.
[0015]
Next, attachment of the cover 9 and the end plate 1 will be described with reference to FIGS. 1, 2, and 5. FIG. 5 shows a state in which the cover 9 is attached to the end plate 1 and one cover ring 12B is removed. In these drawings, a flange 9 a having the same diameter as that of the end plate 1 is formed at the end of the cover 9 on the opening side. The flange 9a is brought into contact with the end plate 1 through the cover seal packing 11, and two cover rings 12A and 12B which are formed in a U-shaped cross section and are pin-coupled to each other are wound around the end portions of the flange 9a. Is tightened in the rotation direction with a screw 24, whereby the cover 9 and the end plate 1 are integrally fixed in an airtight state.
[0016]
Next, the tension member gripping portion on the back side of the end plate 1 will be described with reference to FIG. FIG. 6 is a perspective view showing the back side of the end plate 1 with the cover 9 removed. In the figure, the outer portions of the pass-type optical cables 2 and 3 inserted through the end plate 1 are fixed by a main cable gripping bracket 25 integrated with the end plate 1. Further, the tension member portions of the optical cables 2 and 3 are gripped by the main cable tension member gripping fitting 26.
[0017]
Similarly, the branching optical cables 4 to 7 that are inserted into the end plate 1 and fused and connected to the passing optical cables 2 and 3 are branched into the branch cable gripping brackets 27 supported by the end plate 1. The outer part is fixed by ~ 30. Further, these tension member portions are gripped by the branch cable tension member gripping fittings 31-34. In the figure, 35 is a working tray holder, and 36 is a frame.
[0018]
FIG. 7 is an exploded perspective view showing the branch cable gripping bracket 27 of FIG. 6 in an enlarged manner. The holding metal fitting 27 supports two holding plates 51 and 52 having a demon plate as an abutting portion with an inner cable so that the distance between them can be adjusted with two bolts 53 and 54. A pair of long hole brackets 55 and 56 are provided on both sides of the side surface of the holding plate 52, and the long hole brackets 55 and 56, which are guide mechanisms, are slidably attached to the end plate 1 (not shown). When the gripping plates 51 and 52 are fastened, the cable can reciprocate freely in the radial direction of the cable, and when the actual optical cable 5 is fixed, it is always adjusted to the center regardless of the diameter of the cable. The other holding fixtures 28 to 30 have the same configuration.
[0019]
Next, the storage part on the back side of the end plate 1 will be described with reference to FIGS. 1 and 8. FIG. 8 is a perspective view showing the back side of the end plate 1 with the cover 9 removed. In these drawings, on the extension of the frame 36 on the back side of the end plate 1, a plurality of fusing trays 39 are stacked at regular intervals by combining left and right side plates 37, 38 having grooves formed at regular intervals. A storage portion 8 is formed.
[0020]
The fusion tray 39 can be inserted into and removed from the storage unit 8 slightly upward, that is, in a direction crossing the axial direction, and the work tray 41 shown in FIG. 9 can be attached to the removed trace. . The work tray 41 has a movable range slightly larger than 180 degrees by connecting a plate 42 having the same width as the fusion tray 39 and a plate 43 narrower than the plate 42 with a hinge 44. In the figure, the plate 43 is raised clockwise and the protrusion 45 is on the upper surface. The protrusion 45 is for engaging the fusion tray 39 and fixing the fusion tray 39 when the fusion tray 39 is set thereon.
[0021]
Thus, when the work tray 41 is inserted into the trace of the fusion tray 39 extracted for work, and the fusion tray 39 is attached to the work tray 41, work such as fusion connection is performed. Work such as connecting an optical cable on the fusing tray 39 and cleaning up the extra length is facilitated and work efficiency is improved. Next, when the work is completed, the work tray 41 is removed, and the fused tray 39 that has been worked is returned to the work tray 41. The removed work tray 41 is folded and stored in the work tray holder 35 while not in use. This prevents the work tray 41 from being lost when not in use.
[0022]
【The invention's effect】
As described above, according to the present invention, a pair of pass-through optical cables and other branching optical cables are configured to enter and exit on one side of the end plate. In the case of an optical cable laid on a railway line where it is more convenient to concentrate the entrances and exits, an optimal optical communication cable closure can be provided.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an embodiment of a closure according to the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is an exploded perspective view showing a part of FIG. 2 in an exploded manner.
4 is an exploded perspective view showing a part of FIG. 3 in a further exploded state. FIG.
FIG. 5 is an external view of a state where a cover is attached to an end plate.
FIG. 6 is a perspective view showing the back side of the end plate with the cover removed.
7 is an exploded perspective view showing the branch cable gripping metal fitting of FIG. 6 in an enlarged manner. FIG.
FIG. 8 is a perspective view showing the back side of the end plate with the cover removed.
FIG. 9 is a perspective view of a working tray.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 End plate 2, 3 Passing type optical cable 4-7 Optical cable for branching 8 Storage part 9 Cover 9a Flange 11 Cover seal packing 12A, 12B Cover ring 13 End surface rubber packing 14A, 14B Cable clip 14a Flange part 15 Bolt 16 Cable insertion Hole 17 Seal tape 18 Stepped hole 19 Seal tape 21 End rubber packing 22 Cable blank bracket 24 Screw 25 Main cable gripping bracket 26 Main cable tension member gripping brackets 27-30 Branch cable gripping brackets 31-34 Branch cable tension member gripping bracket 35 Work tray holder 36 Frame 37, 38 Side plate 39 Fusing tray 41 Work tray 42, 43 Plate 44 Hinge 45 Projection 51, 52 Grasping plate 53, 54 Bolt 55, 56 Long hole bracket

Claims (5)

An end plate formed with an optical cable insertion part through which a passing optical cable and a branching optical cable are inserted inside with an outer circular shape;
A plurality of fusing trays are formed integrally on one side of the end plate and can be inserted and removed in a direction crossing the central axis direction of the end plate. An optical cable storage section for storing the long section;
A bottomed cylinder in which the optical cable storage portion is housed, and a cover in which an opening end portion is formed with a flange having substantially the same diameter as the end plate;
After the flange of the cover abuts the end plate via a sealing material, the outer periphery is covered with a ring cover having a U-shaped cross section, and then the ring cover is tightened in the circumferential direction to integrate the cover and the end plate. Integration means to
A working tray constructed by connecting two plates with a hinge so that it can be folded;
With
One plate of the work tray is inserted into the space after pulling out the fusion tray from the optical cable storage part when connecting the optical cable or when finishing the extra length, and the other plate of the work tray is the work target. passing the core wire-storing closure for optical communication cables, characterized in that as fusion tray is installed. In the closure for optical fiber communication cables of the passing core wire storage type according to claim 1,
An optical communication cable closure of a passing core wire storage type, characterized in that a holder for storing a working tray when not in use is provided in the optical cable storage portion. In the closure for optical fiber communication cables according to claim 1 or 2,
The part of the optical cable insertion part through which a pair of pass-through optical cables are inserted is covered with a cylindrical end rubber packing with slits on both optical cables, the outside is sandwiched between two cable clips, and then tightening means is used. After the cable clip is integrated, the cable clip is brought into contact with the insertion hole portion of the end plate through a sealing material, and then the cable clip is fixed to the end plate using fixing means. Wire storage type optical communication cable closure. In the closure for optical fiber communication cables of the passing core wire storage type according to claim 1, 2 or 3.
The portion of the optical cable insertion portion through which the branching optical cable other than the passing core wire is inserted is covered with a cylindrical end rubber packing on the optical cable, and the outside and one end surface are supported by the cable blank bracket, and then the end plate An optical communication cable closure of a passing core wire storage type, wherein the cable blank bracket is brought into contact with an insertion hole portion via a sealing material, and then the cable blank bracket is fixed to the end plate using a fixing means. In the optical fiber cable closure of the passing core wire storage type according to claim 1, 2, 3 or 4,
Two gripping plates that pass through the optical cable insertion part and sandwich the optical cable inside the end plate from both sides, two bolts that support these two gripping plates, and both sides of one gripping plate are provided A branch hole that functions as a guide mechanism that guides the optical cable in the long axis direction of the long hole bracket by changing the mounting position of the long hole bracket to the end plate and holding it movably. A cable core-holding optical communication cable closure characterized by comprising a cable gripping bracket.

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