JP6866039B2 - Exterior replacement closure - Google Patents

Description

The present invention relates to an exterior replacement closure for removing an interior component of an existing closure and relocating it as it is.

In optical cable closures, for example, the interior parts of an airtight existing closure installed underground may be moved to a fictitious closure, or the interior parts of an existing closure may be moved to a new closure as the number of lines increases. ..

Here, FIGS. 8 and 9 are prior arts described in Patent Document 1. This prior art is for relocating the interior parts of the existing closure shown in FIG. 8 to the new closure shown in FIG.

8 (a) is a plan view of the existing closure, and FIG. 8 (b) is a front view. In these views, 101a is a mounting board, 102a is an extra length accommodating tray (fusion connection tray), and 103 is an optical cable. 104 is an optical fiber core wire, 108 is an end face rubber packing, 109 is a sleeve, 110 is a cable gripper, and 111 is a tension member fixing tool.

When relocating the interior parts of the existing closure to the new closure shown in FIG. 9, the following procedure is followed.
9 (a) is a plan view of the new closure, FIG. 9 (b) is a front view, and FIG. 9 (c) is a side view. The extra length storage tray 102a in the drawing is relocated from the existing closure of FIG. It is a thing. Further, the mounting boards 112a and 112b are preliminarily fixed to the new closure, and 102b is an extra length accommodating tray previously fixed to the mounting board 112b.

As the work of relocating the interior parts, first, in FIGS. 8A and 8B, the extra length accommodating tray 102a of the existing closure is removed from the mounting board 101a, and then the cable gripper 110, the tension member fixing tool 111, and the optical cable are removed. Release the fixation with 103. In this state, the extra length accommodating tray 102a and the optical cable 103 with the optical fiber core wire 104 still connected are removed from the sleeve 109.

Next, in the new closures shown in FIGS. 9 (a) to 9 (c), in order to relocate the extra length accommodating tray 102a and the optical cable 103 of the existing closure, the mounting board 112a, the cable gripping tool 106, the tension member fixing tool 107, etc. Is fixed in advance, the extra length accommodating tray 102a of the existing closure is fixed to the mounting board 112a, the optical cable 103 of the existing closure is gripped by the cable gripper 106, and the tension member is fixed to the tension member fixture 107.
After that, the sleeve 121 is appropriately fixed so as to surround the whole, and the sleeve 121 is sealed to complete the relocation.
In FIG. 9B, 122 is an end face rubber packing and 123 is a sealing tape.

Next, FIG. 10 shows the prior art described in Patent Document 2. This prior art also relocates the interior parts of the existing closure to the new closure in order to add more lines.
In FIG. 10, 201a is an extra length accommodating tray of the existing closure that has been relocated, 202 is a mounting board, 203 is an optical cable, 204 is a cable gripper, 205 is an optical fiber core wire, 206 is a tension member fixture, and 207 is an end face. The rubber packing, 201b is the extra length storage tray of the new closure to be relocated, 210 is the lower sleeve, 211 is the upper sleeve, and 212 and 213 are packing receiving parts having a concave curved surface that matches the outer peripheral surface of the end face rubber packing 207. ..

In this prior art, the extra length accommodating tray 201a is removed from the existing closure while the extra length accommodating tray 201a is fixed to the mounting board 202, and the optical cable 203 is also fixed to the cable gripper 204 and the tension member fixture 206, and the entire optical cable 203 is removed from the existing closure. As a relocation unit, the interior parts have been relocated by accommodating and fixing them in the lower sleeve 210 of the new closure and covering them with the upper sleeve 211.

Japanese Unexamined Patent Publication No. 2005-148486 (paragraphs [0029] to [0036], FIGS. 1, 4, etc.) Japanese Patent No. 3765878 (paragraphs [0013] to [0018], FIG. 1, etc.)

In the prior art shown in FIGS. 8 and 9, there is a problem that workability is poor because it is necessary to take time and effort to remove the extra length accommodating tray 102a from the mounting substrate 101a when relocating the extra length accommodating tray 102a.
On the other hand, in the prior art shown in FIG. 10, the extra length accommodating tray 201a to be relocated is not removed from the mounting board 202, and the cable gripper 204 and the optical cable 203 are relocated to the new closure as they are. Can be done.

However, since the optical cable introduction portion of the new closure is only isolated from the outside by the end face rubber packing 207, the watertightness inside the new closure is not perfect. If the outer shape and size of the end face rubber packing 207 differ due to a difference in the diameter of the optical cable 203 to be relocated, the concave curved surface of the packing receiving portions 212 and 213 previously formed on the lower sleeve 210 and the upper sleeve 211 The outer peripheral surface of the end face rubber packing 207 did not come into close contact with the outer peripheral surface, and there was a risk that the watertightness inside the new closure would be impaired.

Therefore, the problem to be solved by the present invention is that the interior parts of the existing closure can be relocated by a simple operation, and the watertightness inside the closure is improved regardless of the outer shape of the end face rubber packing used in the existing closure. The purpose is to provide an exterior replacement closure that can be used.

In order to solve the above problem, the invention according to claim 1 incorporates an extra length accommodating tray including a fusion splicing portion of the fiber core wire, a tray fixing substrate to which the extra length accommodating tray is fixed, and the fiber core wire. An interior component having at least a cable gripper for gripping the optical cable, a tension member fixture, and an end face rubber packing arranged outside the cable gripper through which the optical cable is inserted is removed from the existing closure and relocated. In the exterior replacement closure to which the cable is to be relocated, the exterior replacement closure is provided with a flat plate-shaped mounting substrate arranged between a pair of side frames.
A relocation board on which the interior parts removed from the existing closure are placed and fixed, and
A stopper provided with a stopper temporarily fixed on the relocation board using an elongated hole along the insertion direction of the optical cable.
The end of the tray fixing board placed on the transfer board is brought into contact with the side piece of the stopper, the tray fixing board is positioned along the insertion direction, and the stopper is fixed to the transfer board. The tray fixing substrate is sandwiched between the tray fixing substrate and the transfer substrate and fixed, and the transfer substrate is integrally fixed to the mounting substrate .

The invention according to claim 2 is characterized in that, in the exterior replacement closure according to claim 1, a grommet through which the optical cable introduced from the outside is closely inserted is mounted inside the side frame. And.

According to the present invention, the extra length accommodating tray including the fusion splicing portion of the cable core wire, the optical cable, the end face rubber packing, etc. are left as they are, and the tray fixing substrate, the cable gripper, the tension member fixing tool, etc. By fixing the entire interior parts of the existing closure to the relocation board and further fixing this relocation board to the mounting board on the exterior replacement closure side, the interior parts of the existing closure can be easily relocated to the exterior replacement closure. it can.
Further, since the inside of the exterior replacement closure is separated from the outside by the end face rubber packing and the grommet used for the existing closure, the watertightness inside the closure can be improved.

It is a top view of the transfer substrate in embodiment of this invention. It is explanatory drawing of the stopper in embodiment of this invention. It is a perspective view of the holding plate in embodiment of this invention. It is an overall block diagram which shows the Embodiment of this invention. In the embodiment of the present invention, it is a plan view of an interior component of an existing closure (FIG. 5 (a)) and an internal plan view of an exterior replacement closure in a state where the interior component is relocated (FIG. 5 (b)). .. It is a partially enlarged view of FIG. 5 (b). It is a perspective view which shows the grommet and its use state in embodiment of this invention. It is explanatory drawing of the existing closure described in Patent Document 1. It is explanatory drawing of the new closure described in Patent Document 1. It is a perspective view which shows the relocation state of the closure interior part in Patent Document 2. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show relocation fittings used in the exterior replacement closure of this embodiment.

First, FIG. 1 shows a relocation board 10 on which interior parts of an existing closure are placed and fixed, and a large number of mounting holes 12 and 13 are formed in the vicinity of both ends of a rectangular and flat plate-shaped board body 11. ing.
FIG. 2 shows a stopper 20 for fixing the interior parts of the existing closure while positioning them with respect to the transfer substrate 10. FIG. 2A is a perspective view and FIG. 2B is a plan view.

In FIGS. 2A and 2B, the stopper 20 includes a rectangular and flat base piece 21, side pieces 28a and 28b erected on both sides thereof, and wings formed at both ends of the base piece 21. The pieces 22 and 23, the orthogonal pieces 24 and 25 formed so as to be orthogonal to the base piece 21 from the vicinity of both ends of the base piece 21, and the wings formed stepwise at the tips of these orthogonal pieces 24 and 25. It has pieces 26 and 27. In addition, elongated holes 22a, 23a, 26a, 27a are formed in the blade pieces 22, 23, 26, 27.

Further, FIG. 3 is a perspective view of a rectangular and flat plate-shaped pressing plate 30, and elongated holes 31 and holes 32 are formed at both ends thereof.
The transfer substrate 10, the stopper 20, and the holding plate 30 are all made of metal, but may be made of, for example, hard plastic as long as sufficient rigidity and strength can be obtained.

Next, FIG. 4 is an overall configuration diagram of the exterior replacement closure according to this embodiment, FIG. 4A is a plan view, FIG. 4B is a front view, and FIG. 4C is a side view. FIG. 4D is an internal structure diagram.
FIG. 4D shows a state in which the stopper 20 and the holding plate 30 are arranged on the transfer board 10, and the transfer board 30 is placed on the mounting board 48 of the exterior replacement closure. Reference numeral 41 denotes a side frame integrally connected to both ends of the mounting board 48, and 42 is a hanging metal fitting for suspending the exterior replacement closure from the messenger wire.
Further, 43 and 44 are fixing pieces selectively used for pressing the interior parts of the existing closure with the pressing plate 30 and fixing them to the transfer substrate 10.

Further, in FIG. 4C, reference numerals 45 and 46 are grommets mounted inside the side frame 41 for introducing the optical cable into the exterior replacement closure, and are for the one-row optical cable grommet 45 or the two-row optical cable. The grommet 46 is appropriately selected and used. Reference numeral 47 denotes a sleeve attached so as to cover the interior parts between the pair of side frames 41.

5A and 5B are a plan view of the interior parts of the existing closure in this embodiment (FIG. 5A) and an internal plan view of the exterior replacement closure after the interior parts have been relocated (FIG. 5B). Is shown.

The interior component 70 of the existing closure shown in FIG. 5A includes a tray fixing substrate 71, an extra length accommodating tray 72, a cable gripping tool 75, a tension member fixing tool 76, an end face rubber packing 74, an optical cable 73, and the like. Is entirely covered by a sleeve 77.
When relocating the interior component 70, the sleeve 77 is removed, and the extra length accommodating tray 72 including the fusion splicing portion of the cable core wire, the optical cable 73, and the end face rubber packing 74 are left as they are, and the tray fixing substrate 71, The entire interior component 70 including the extra length accommodating tray 72, the optical cable 73, the end face rubber packing 74, the cable gripper 75, the tension member fixture 76, etc. is placed on the transfer board 10 shown in FIG. 5 (b). In this way, it is fixed to the transfer substrate 10.

Here, FIG. 6 is a partially enlarged view of FIG. 5 (b).
The above-mentioned stopper 20 is temporarily fixed on the transfer substrate 10, and as shown in FIG. 6, the tray fixing substrate 71 of the interior component 70 is positioned and its end 78 is brought into contact with the side piece 28a of the stopper 20. In this state, the stopper 20 is fixed to the transfer substrate 10.
Next, the holding plate 30 is tightened to the transfer board 10 via the fixing piece 44, and the tray fixing board 71 is fixed to the transfer board 10 so as to sandwich the tray fixing board 71 between the holding plate 30 and the transfer board 10.
Then, the transfer board 10 may be integrally fixed to the mounting board 48 by bolting and nut-tightening the transfer board 10 to the mounting board 48 using the mounting holes 12 and 13 of the transfer board 10.

After the interior parts 70 of the existing closure are transferred to the exterior replacement closure 80 in this way, the entire closure is hung on the messenger wire using the hanging metal fitting 42, and then the sleeve 47 shown in FIG. 5B is covered and fastened. If it is fastened with a band or the like, the relocation of the interior parts 70 of the existing closure is completed.

FIG. 7 shows the above-mentioned grommets 45 and 46 (FIGS. 7 (a) and 7 (b)) mounted inside the side frame 41 and their usage states (FIG. 7 (c)). It is a seal portion of each grommet 45, 46. These grommets 45 and 46 can be opened and closed in the directions of arrows a'and b'.

The upper end of the side frame 41 can be opened and closed, and the grommets 45 and 46 through which the optical cable 73 is inserted are attached to the side frame 41 whose upper end is open, the upper end is closed and fixed, and the sleeve 47 is further attached. By doing so, the extra length accommodating tray 72 side is maintained in watertightness by the grommets 45 and 46 and the end face rubber packing 74.
Since the end face rubber packing 74 is arranged in the exterior replacement closure 80 without using the packing receiving portions 212 and 213 as in Patent Document 2 described above, the internal structure of the exterior replacement closure 80 is the end face rubber. The outer shape and size of the packing 74 are not restricted. Therefore, the diameter of the optical cable to be relocated is not particularly limited, and the interior parts on which the optical cables having various diameters are mounted can be relocated.

Further, by using the grommets 45 and 46, the sealing material conventionally required for opening and closing the sleeve and the expansion of the optical cable and the end face rubber packing corresponding to the diameter of the optical cable are not required.
Further, by forming a groove or a hole for draining water at an appropriate position on the bottom of the side frame 41 or the sleeve 47, even if water should enter the closure, it can be reliably drained.

If a sheet-shaped fiber protector (not shown) is attached in advance near the cable gripper 75 of the exterior replacement closure and the fiber protector covers the periphery of the optical cable 73, the optical cable 73 and the fiber The core wire can be protected.
Needless to say, when relocating the interior parts, the extra length storage tray may be increased to increase the number of lines as needed.

The present invention is effective, for example, when the interior parts of an existing closure installed underground are transferred to a fictitious closure for use.

10: Relocation board 11: Board body 12, 13: Mounting hole 20: Stopper 21: Base piece 22, 23, 26, 27: Blade piece 22a, 23a, 26a, 27a: Long hole 24, 25: Orthogonal piece 28a, 28b : Side piece 30: Holding plate 31: Long hole 32: Hole 41: Side frame 42: Hanging metal fitting 43: 44: Fixed piece 45, 46: Grommet 45a, 46a: Seal part 47: Sleeve 48: Mounting board 70: Existing closure Interior parts 71: Tray fixing board 72: Extra length accommodating tray 73: Optical cable 74: End face rubber packing 75: Cable gripper 76: Tension member fixing tool 77: Sleeve 78: End 80: Exterior replacement closure

Claims (2)

An extra length accommodating tray including a fusion splicing portion of the fiber core wire, a tray fixing substrate to which the extra length accommodating tray is fixed, a cable gripper for gripping an optical cable containing the fiber core wire, and a tension member fixture. An exterior replacement closure that is a transfer destination when an interior component having at least an end face rubber packing that is arranged outside the cable gripper and through which the optical cable is inserted is removed from an existing closure and relocated. In an exterior replacement closure with a flat mounting board placed between a pair of side frames.
A relocation board on which the interior parts removed from the existing closure are placed and fixed, and
A stopper provided with a stopper temporarily fixed on the relocation board using an elongated hole along the insertion direction of the optical cable.
The end of the tray fixing board placed on the transfer board is brought into contact with the side piece of the stopper, the tray fixing board is positioned along the insertion direction, and the stopper is fixed to the transfer board. An exterior replacement closure characterized in that the tray fixing substrate is sandwiched and fixed between the tray fixing substrate and the transfer substrate by a holding plate, and the transfer substrate is integrally fixed to the mounting substrate. In the exterior replacement closure according to claim 1,
An exterior replacement closure characterized in that a grommet into which the optical cable introduced from the outside is closely inserted is mounted inside the side frame.

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