JP2002071968A - Optical fiber fusion splicing tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical fiber fusion splicing tray having a splicing part holding means for surely fixing and housing fusion splicing parts regardless of the size of the diameter of the fusion splicing part. SOLUTION: In the fusion splicing tray which houses the fusion splicing part 20 between coated optical fibers of an optical cable or the fusion splicing part 30 between coated optical fiber ribbons, the splicing part holding means 10, wherein a first holding means 40 by which the fusion splicing part 20 for the coated optical fibers is held is formed by a tray bottom surface 1, a holding projecting piece 2 and a protrusion 3 and a second holding means 50 by which the fusion splicing part 30 for the coated optical fiber ribbons is held is formed by a pair of holding projecting pieces 2 and the protrusion 3, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber cable distribution box provided at a relay point of an optical fiber cable or the like. The present invention relates to an optical fiber fusion splicing tray accommodating a section.

[0002]

2. Description of the Related Art In recent years, the need for large-capacity data communication such as the so-called Internet has been increasing. Therefore,
Communication lines using optical fiber cables capable of transmitting a large amount of data are being rapidly developed. In this case, since the length of the optical fiber cable is finite, the necessary length is secured by connecting the optical fiber cable inside the optical fiber cable distribution box or the like provided at the relay point.

[0003] Here, as is well known, an optical fiber cable is a bundle of a plurality of single core wires (hereinafter, referred to as a single core) around a central tension member (hereinafter, referred to as a tape core). Are generally arranged in a cable shape by covering them with a covering material. When such optical fiber cables are connected to each other, the ends of the single cores drawn out from the tape cores are connected to each other by abutting in a sleeve and heat-sealing, or the ends of the tape cores are connected. The joints are formed by abutting the parts together in the sleeve and heat-welding to form a fusion spliced part. In this case, the connection is made after a single core or a tape core has a loop-shaped extra length.

[0004] In order to collectively accommodate such extra length portions and fusion spliced portions, fusion splicing trays accommodating them are stacked in multiple stages in an optical fiber cable distribution box at a connection relay point of an optical fiber cable. Placed. Such an optical fiber fusion splicing is performed on an optical fiber cable coaxially mounted on an electric pole outdoors together with a power line, or an optical fiber cable laid in a sinus.

[0005]

However, there are some cases in which the accommodation of the fusion spliced portion of the optical fiber cable causes a problem. For example, the fusion splicing portion is a thin fusion splicing portion in the case of a single core having only one core wire, or a thick fusion splicing portion in the case of including a plurality of core wires such as a tape core wire. However, there has been no connecting portion holding means capable of fixing and housing the fusion splicing portions having different diameters, and it has been difficult to fix and house the connecting portion. There is a need for connecting portion holding means capable of accommodating fusion spliced portions having different diameters.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a connecting portion clamping means for securely fixing and housing the fusion spliced portion regardless of the diameter of the fusion spliced portion. An object of the present invention is to provide an optical fiber fusion splicing tray.

[0007]

According to a first aspect of the present invention, there is provided an optical fiber cable in which a fusion spliced portion of a single fiber or a fiber ribbon is connected. In the fusion splicing tray sandwiched and accommodated by the section clamping means, the connection section clamping means is provided between a pair of clamping projections protruding from the tray bottom surface of the fusion connection tray and the pair of clamping projections. And a projection that stands upright so that the height from the tray bottom surface is lower than the height of the holding projection piece.A single-core fusion spliced portion is held by the tray bottom face, the holding projection piece, and the projection. A first holding means is formed, and a second holding means in which the fusion spliced portion of the tape core is held by the pair of holding protrusions and the projection is formed.

According to a second aspect of the present invention, in the optical fiber fusion splicing tray according to the first aspect, a tray bottom surface around both ends of the holding protruding piece to make both ends of the holding protruding piece free ends. The free end is provided with a slope for pressing the fusion splicing portion, and the second clamping means in which the fusion splicing portion of the tape core wire is clamped by the free end and the projection of the clamping projection piece. It is characterized by being formed.

According to a third aspect of the present invention, in the optical fiber fusion splicing tray according to the first or second aspect, the holding projection and the projection are provided in a plurality of rows and a plurality of columns. The connecting portion holding means is arranged over a plurality of rows, and the fusion spliced portion is held by the connecting portion holding means at an optimum position corresponding to the single core length or the tape core length.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical fiber fusion splicing tray according to an embodiment of the present invention will be described below. FIGS. 1A and 1B are four views of the fusion splicing tray of this embodiment. FIG. 1A is a front view, FIG. 1B is a bottom view, FIG. 1C is a rear view, and FIG. Is a right side view. 2 and 3 are enlarged views of the fusion splicing tray of the present embodiment. FIG. 2A is an enlarged front view, FIG. 2B is a sectional view taken along line AA of FIG. a) is a detailed view of the connecting portion holding means, FIG.
(B) is a detailed view of the connection portion holding means to which the fusion connection portion is attached.

The fusion splicing tray 100 is shown in FIGS.
The shape is as shown in FIG. As shown in FIG. 2A, the fusion splicing tray 100 is provided with a plurality of rows (FIG. 1) of connection section clamping means 10 for fixing and storing fusion splicing sections having different diameters. 10 rows) and over a plurality of columns (8 columns in FIG. 1). Specifically, as shown by the wavy line in FIG. 2A, the connecting portion holding means 10 includes a pair of upper and lower holding protrusions 2 erected from the tray bottom surface 1 and a pair of holding protrusions. One connecting portion holding means 10 is formed by the protrusions 3 (a pair of protrusions arranged side by side in the figure in FIG. 2) formed between the two.

As described above, since the holding projections 2 and the projections 3 are provided over a plurality of rows and a plurality of columns, the connecting portion holding means 10 is formed over a plurality of rows and a plurality of columns. By selecting the connecting portion holding means 10 located at the optimum position according to the wire length, the fusion spliced portion can be held.

Slots 4 are provided in the tray bottom surface 1 around the right and left ends of the holding projection 2 and both sides of the holding projection 2 are formed as free ends. The free ends on both sides of the holding protruding piece 2 can be slightly deformed in the vertical direction in FIG. Further, as shown in FIGS. 2A and 2B, the holding projection 2 is formed to be inclined downward in FIG. The reason why the holding projection 2 is formed in this manner will be described later.

An optical fiber single core or a tape core is introduced into the fusion splicing tray 100. These single cores or tape cores are covered by a sleeve after their cut surfaces are fusion-spliced, so that the single cores or tape cores as shown in FIG. Thus, a small-diameter fusion spliced portion 20 and a large-diameter fusion spliced portion 30 for a tape core wire are formed. In addition, when the single core or the tape core is extremely long, although not shown,
The fusion spliced portions 20 and 30 are formed after a single core or a tape core is wound and accommodated to form an extra length.

To fix and house the fusion splicing portions 20 and 30 with one connecting portion holding means 10, FIGS.
As shown in (a) and (b), the height of the projection 3 based on the tray bottom surface 1 is formed to be lower than the height of the holding projection 2 also based on the tray bottom surface 1. .
As a result, as shown in FIGS. 3A and 3B, the first holding means (FIG. 3B) in which the single-core fusion spliced portion 20 is held by the tray bottom surface 1, the holding projection 2 and the projection 3 ) Is formed, and the tapered fusion spliced portion 30 is clamped so as to be in contact with the pair of clamping projections 2 and the projections 3. Means (FIG. 3 (b)
The part (the part in contact with the large-diameter circle in the middle) 50 is formed.

As shown in FIGS. 3 (a) and 3 (b), one connecting portion clamping means 10 uses a single-core fusion splicing portion 20 having a small diameter and a large-diameter fusion splicing portion for a tape core wire. Connection part 30
Can be clamped respectively. Further, the fusion spliced portion 30 for the tape core wire is pressed in the direction of the arrow A in FIG. 3B by the free ends on both the left and right sides of the sandwiching protruding piece 2, so that it is securely fixed.

According to the present embodiment, the connecting portion holding means 10 is selected so as to be at an optimum position according to the length of a single core or a tape core, and fusion splicing is performed regardless of a large diameter or a small diameter. The portions 20 and 30 can be sandwiched and can be securely fixed and accommodated in the fusion splicing tray 100. Further, since it is necessary to replace the existing spliced core with a new core, a new splicing is performed to shorten the core of the passing cable, and the positions of the spliced parts 20 and 30 are changed. 1 and 2, the connecting portion holding means 10 in another row in the left and right direction can be selected and held, and can be securely fixed and accommodated in the fusion splicing tray 100.

[0018]

According to the present invention, there is provided an optical fiber fusion splicing tray having a joint clamping means for securely fixing and housing the fusion spliced portion regardless of the diameter of the fusion spliced portion. Can be.

[Brief description of the drawings]

FIG. 1 is a four-sided view of a fusion splicing tray according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a fusion splicing tray according to the embodiment of the present invention.

FIG. 3 is an enlarged view of a fusion splicing tray according to the embodiment of the present invention.

DESCRIPTION OF SYMBOLS 1 Tray bottom surface 2 Nipping protrusion 3 Protrusion 4 Slot 10 Connecting part holding means 20 Fusion connection part 30 Fusion connection part 40 First holding means 50 Second holding means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsumi Miyazawa 1-2-2 Oshima, Koto-ku, Tokyo Co., Ltd. Shodensha Inc. (72) Inventor Daisuke Yoshida 1-2-23 Oshima, Koto-ku, Tokyo Shares Company Shodennai F term (reference) 2H036 MA11 2H038 AA21 CA37 CA38 CA65 CA68 5G375 AA18 CA02 CA12 DB23 EA17

Claims (3)

[Claims] 1. A fusion splicing tray in which a fusion spliced portion of an optical fiber cable or a spliced optical fiber cable is clamped and accommodated by a coupling portion clamping means. The means includes a pair of holding protrusions projecting from the tray bottom surface of the fusion splicing tray, between the pair of holding protrusions, so that the height from the tray bottom surface is lower than the height of the holding protrusions. And a first holding means for holding a single fusion spliced portion by the tray bottom surface, the holding protrusion and the protrusion, and a tape core comprising a pair of holding protrusions and the protrusion. 2. An optical fiber fusion splicing tray, wherein a second clamping means for clamping the fusion splicing portion is formed. 2. The optical fiber fusion splicing tray according to claim 1, wherein a slot is provided in a tray bottom surface around both ends of said holding projection to make both ends of said holding projection free. The end is provided with a slope for pressing the fusion splicing portion, and a second clamping means for clamping the fusion splicing portion of the tape core by the free end and the projection of the clamping protrusion is formed. Optical fiber fusion splicing tray. 3. The optical fiber fusion splicing tray according to claim 1, wherein the holding projection and the projection are provided over a plurality of rows and a plurality of columns, and the connection section holding means is provided over a plurality of rows and a plurality of columns. An optical fiber fusion splicing tray characterized in that a fusion splicing portion is clamped by a coupling portion clamping means located at an optimum position according to a single core length or a tape core length.