JP2003273538A - Optical fiber core tray - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical fiber core tray A which is constructed so that a core tray body A1 and a connection holding component H are separated and the connection holding component can be mounted on the core tray body detachably. <P>SOLUTION: The core tray A is constructed so that the core tray body and the connection holding component are separated and the connection holding component can be mounted on the core tray body detachably, thereby, preventing abnormal tension from exerting the optical fiber core or the connection, etc. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber core tray for receiving an optical fiber core.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a substantially rectangular base 1'is provided with an inlet 2'for an optical fiber core wire B, and an optical fiber is provided on the base 1 '. There is known an optical fiber core tray A ′ provided with a number of connecting part holding members 3 ′ corresponding to the fiber cores B. Further, in the conventional optical fiber core wire tray A ', a peripheral wall 4'is formed along the peripheral edge of the base 1', and the optical fiber core wire B wound around the peripheral wall 4'is formed along the peripheral wall 4 '. Extra length part B1 is arranged,
Further, an appropriate number of core wire locking portions 5'and the like are provided at the upper end of the peripheral wall 4'to prevent the extra length portion B1 from protruding from the optical fiber core wire tray A '.

The above-mentioned conventional optical fiber core tray A '
In the case of performing work such as switching or cutting of the optical fiber core wire B, the connection portion C is removed from the connection portion holding member 3 ′ holding the connection portion C of the optical fiber core wire B to be worked. Then, the optical fiber core wire B having a predetermined length is rewound from the extra length portion B1, the optical fiber core wires B at both ends of the connection portion C are cut off, and another new optical fiber core wire B is connected. After that, the connecting portion C is gripped by the original connecting portion holding member 3 ′, and the optical fiber core wire B is further wound to form the extra length portion B.
1 was prepared, the wound extra length portion B1 was accommodated in the optical fiber core wire tray A ', and the work of switching and dividing the optical fiber core wire B was completed.

[0004]

In the above-mentioned conventional optical fiber core wire tray A ', the location of the connection portion C is cut out every time the optical fiber core wire B is switched or cut. Each time, the optical fiber core wire B of the extra length portion B1 becomes short, and the connecting portion C cannot be attached to the predetermined connecting portion holding portion 3 '. Generally, only a few times, such as switching and cutting of the optical fiber B, can be performed.
If the switching or cutting work is forcibly performed, an excessive tensile force is applied to the optical fiber core wire B, the optical fiber core wire B is broken,
Further, there is a problem that the winding diameter of the extra length portion B1 becomes small and the optical loss is increased, and further, the connection portion C cannot be attached to the connection portion holding member 3 ′.

An object of the present invention is to solve the problems of the above-described conventional optical fiber core tray and to provide an optical fiber core tray with improved utilization of the optical fiber cores.

[0006]

In order to achieve the above-mentioned object, the present invention firstly separates a core wire tray main body and a connecting portion holding member into the core wire tray main body,
The connection part holding member is configured to be detachably attached, and secondly, the bank part is sandwiched between the connection part holding member to form a connection part fitting space part for a small-diameter connection part. A connection portion fitting space portion for a large-diameter connection portion is formed above the bank portion.

[0007]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples as long as the gist of the present invention is not exceeded. In addition, the optical fiber core wire and the connection portion of the optical fiber core wire housed in the optical fiber core wire tray are
Since they are not special and are the same, in the embodiments of the present invention, the reference numerals of the optical fiber core wire, the extra length portion, and the connection portion are:
Similarly, B, B1 and C are used.

Reference numeral 1 denotes a core wire storage portion having a substantially rectangular bottom plate 3 having a plurality of holes 2 formed therein, and long side walls 4 facing each other along a long side of the substantially rectangular bottom plate 3, 5 is formed. Reference numeral 6 denotes a lead-out inlet portion formed on the opposite short sides of the substantially rectangular bottom plate 3, and the lead-in inlet portion 6 has a bottom plate 3
A plurality of standing walls 6a that are substantially parallel to each other are erected on one of the long side walls 4 formed along the long side of, and a core wire lead-out / inserting gap 6b is formed between adjacent standing walls 6a. The core wire lead-in / out gaps 6b formed between the adjacent standing walls 6a may be all equally spaced, or some may have wide gaps.

Among the long side walls 4 and 5 formed along the long side of the bottom plate 3, 7 is formed between the long side wall 5 located farther from the lead-out inlet portion 6 and the lead-out inlet portion 6. In the present embodiment, the short side wall portion 7 is a short side wall portion and is formed in a box shape having four side walls 7a, 7b, 7c, and 7d, the upper side of which is open.

Reference numeral 8 denotes a core wire cover, and the core wire cover 8
Is a holding piece 8c connected to the flat plate portion 8a through the flat plate portion 8a and the thin hinge portion 8b, and a side surface shape that is connected to the flat plate portion 8a opposite to the holding piece 8c has a substantially V-shaped insertion. Part 8
d, and a plate-shaped gripping portion 8e formed substantially flush with the flat plate portion 8a connected to the fitting portion 8d. The core wire cover 8 has a holding piece 8 in a gap 9 formed between one long side wall 4 of the lead-out inlet portion 6 and the standing wall 6a adjacent to the long side wall 4.
It is configured to be retained by inserting c. Further, the fitting portion 8d of the core wire cover 8 is attached to the short side wall portion 7
The core wire cover 8 is placed in a horizontal state by fitting it into the gap 10 formed between the side wall 7d on the side of the outlet port 6 and the side wall 7d of the short side wall portion 7 of the outlet port 6 and the adjacent standing wall 6a. It is configured to be able to hold. From such a state, by inserting a finger under the grip portion 8e of the core wire cover 8 and lifting the grip portion 8e, the flat plate portion 8a and the fitting portion 8d of the core wire cover 8 are centered around the thin hinge portion 8b. In addition, it is configured to be able to rotate upward.

Reference numeral 11 denotes a core wire lead-in / out gap formed between the side wall 7c of the short side wall portion 7 and the long side wall 5 adjacent to the side wall 7c. Such a core wire lead-in / out gap 11 can be formed or omitted as necessary.

Reference numeral 12 denotes a core wire retaining piece extending from the upper ends of the long side walls 4 and 5 and the short side wall portion 7 in a substantially horizontal direction in the direction of the wire storage portion 1 and accommodated in the wire storage portion 1 in a wound state. The optical fiber core wire B has a function of preventing the optical fiber core wire B from protruding from the wire storage portion 1.

The wire housing 1 having the above-described plurality of holes 2 formed therein, the bottom plate 3, the long side walls 4, 5, the lead-out inlet 6, the short side wall 7, the core cover 8, and the core fastener 12. As described above, the core tray main body A1 that constitutes the optical fiber core tray A is configured.

Next, the connecting portion holding member H will be described with reference to FIG.

The connecting portion holding member H has an introduction slit h1 which is partially cut off along the generatrix and also has a substantially cylindrical main portion h2 having a predetermined length, and the introduction slit h1 is formed. A projecting portion h3 that extends upward is formed so as to face each other from the opposing end portions that constitute it. A substantially cylindrical main part h2 located below the introduction slit h1.
A bank portion h5 extending in the direction of the introduction slit h1 is formed on the upper surface of the bottom portion h4 along the longitudinal direction of the main portion h2. The substantially cylindrical main portion h2 and the bank portion h5 allow the connection portion C to be attached, which has a space portion whose shape viewed from the side end surface h2a of the main portion h2 is approximately three quarters of a cylinder. A pair of connecting portion fitting space portions S1 are formed,
The connecting portion C fitted in the connecting portion fitting space S1 is configured to be held by the inner wall surface h2b of the substantially cylindrical main portion h2 and the arcuate side surface h5a of the bank portion h5. Further, a columnar fitting portion h6 which can be fitted into the hole portion 2 formed in the bottom plate 3 of the above-described core wire tray main body A1 is vertically provided at a substantially central portion of the back surface of the bottom portion h4 of the main portion h2. There is. The connecting portion holding member H having the above-described configuration is integrally molded of synthetic resin, and the main portion h2 having the protruding portion h3 is configured to have elasticity to some extent.

The optical fiber core tray A of the present invention is constituted by the core tray main body A1 and the connecting portion holding member H as described above.

Next, with reference to FIGS. 4 to 6, a method of using the optical fiber core wire tray A comprising the core wire tray main body A1 and the connecting portion holding member H described above will be described.

The optical fiber core wire B is a core wire tray body A1.
Adjacent standing walls 6a of the lead-out inlets 6 arranged at both ends of the
The end portions of the optical fiber core wires B, which enter the core wire tray main body A1 and are introduced into the core wire tray main body A1 from the gaps 9 formed therebetween, are fusion-bonded and fusion-bonded to each other. The place is reinforced with a sleeve to form a substantially columnar connecting portion C. In addition, a columnar fitting portion h6 vertically provided on the back surface of the bottom portion h4 of the main portion h2 of the connecting portion holding member H is fitted into the hole portion 2 formed in the bottom plate 3 of the core tray main body A1. There is.

As shown in FIG. 5, the connecting portion C1 having a relatively small diameter in which the optical fibers B of one core are connected to each other is connected from the introduction slit h1 formed between the protruding portions h3, as shown in FIG. After entering the holding member H, the shape of the main portion h2 of the above-mentioned connecting portion holding member H when viewed from the side end surface h2a direction is a connecting portion fitting space portion S1 having a space portion of about three quarters of a cylinder. The inner wall surface h of the substantially cylindrical main part h2 that is fitted
2b and the arcuate side surface h5a of the bank portion h5. In the present embodiment, two connecting portion fitting space portions S1 are formed with the bank portion h5 sandwiched therebetween, so that the connecting portion holding member H is configured to hold two connecting portions C1. ing.

An appropriate number of fitting portions h6 of the connecting portion holding member H in a state where the connecting portion C is not held are provided in the core tray main body A.
1 is fitted into the hole 2 formed in the bottom plate 3 and then the connecting portion holding member H arranged in the core tray main body A1.
Alternatively, the connecting portion C may be held, or the connecting portion holding member H may hold the connecting portion C before disposing the connecting portion holding member H on the core tray main body A1. After that, the fitting portion h6 of the connection portion holding member H holding the connection portion C may be configured to be fitted into the hole portion 2 formed in the bottom plate 3 of the core tray main body A1.

The optical fiber core wires B introduced into the core tray body A1 from the lead-out entrance portions 6 arranged at both ends of the core wire tray main body A1 are stored in the corresponding lead-out entrance portion 6 side. In each area of the portion 1, the extra length portion B1 is wound to form the extra length portion B1, and even if the extra length portion B1 moves upward, the movement thereof is blocked by the core wire retaining piece 12, Therefore, the optical fiber core wire B is connected to the core wire tray body A.
It is possible to prevent jumping out of 1.

When the optical fiber core wire B is switched or cut, the fitting portion h6 of the connection part holding member H of the predetermined optical fiber core wire B for switching or cutting is connected to the core wire tray main body A1. Of the optical fiber core wire B is removed from the hole 2 formed in the bottom plate 3 of the optical fiber tray B to remove the optical fiber core wire B from the extra length portion B1. Rewind to an appropriate length. Next, the connecting portion C1 is taken out from the connecting portion fitting space S1 of the taken-out connecting portion holding member H, the optical fiber core wire B is cut at both ends of the connecting portion C1, and then one of the cut optical fiber cores is cut. The connection portion C1 formed by fusion-splicing the wire B and another optical fiber core wire B and reinforcing the connection portion with a sleeve or the like is again in the connection portion fitting space S1 of the connection portion holding member H. The fitting portion h6 of the connecting portion holding member H holding the connecting portion C1 is inserted into the core tray main body A1.
The connection portion holding member H is arranged in the core tray main body A1 by being fitted into the hole portion 2 formed in the bottom plate 3 of the above. Further, the extra length portion B1 is formed, and the extra length portion B1 is accommodated in the corresponding line accommodation portion 1 on the side of the lead-out inlet portion 6.

When the optical fiber core wire B and the connecting portion C are not subjected to an unreasonable tensile force during the work of switching or cutting the optical fiber core wire B, the fitting portion of the connecting portion holding member H is used. Although h6 may be attached to the hole portion 2 at the original position, an unreasonable tensile force is applied to the optical fiber core wire B, the connection portion C, or the like, or the original hole portion 2 is smoothly connected to the connection portion holding member. When the fitting portion h6 of H cannot be fitted, the fitting portion h6 of the connecting portion holding member H is fitted into the hole 2 in which an excessive tensile force is not applied to the optical fiber core wire B or the connecting portion C.

Next, when the optical fiber core wire B having a plurality of cores is connected, its connecting portion C2 is larger than the connecting portion C1 connecting the above-mentioned one-core optical fiber core wire B. Will have a diameter. Connection part C with such a large diameter
As shown in FIG. 6, the lower surface of No. 2 is placed on the upper surface h5b of the bank portion h5 of the connection portion holding member H, and the both side surfaces of the connection portion C2 are connected to each other of the connection portion holding member H. The main portion h2 is sandwiched between the end surface h2c or the projecting portion h3 forming the introduction slit h1, or is sandwiched by both the end surface h2c of the main portion h2 of the connecting portion holding member H and the projecting portion h3. It is configured. As described above, the connecting portion holding member H is formed with the two connecting portion fitting space portions S1 for the small diameter connecting portion C1 with the bank portion h5 sandwiched therebetween, and above the bank portion h5 and A connecting portion fitting space S2 for a large-diameter connecting portion C2 sandwiched by a substantially cylindrical main portion h2 is formed.

As shown in FIG. 1, a plurality of hole portions 2 formed in the bottom plate 3 of the core wire tray main body A1 are formed along the long side walls 4 and 5 at a predetermined interval and have a long length. A plurality of them can be formed at a predetermined interval in the direction perpendicular to the side walls 4 and 5, or can be formed only in the central region of the bottom plate 3. Moreover, the shape of the hole 2 is not limited to a circle, but may be an ellipse, a rectangle, or a polygon. Further, the columnar fitting portion h6 formed in the connection portion holding member H is formed into a columnar body having a shape that fits into the shape of the hole 2 described above. When it is not desirable for the connecting portion holding member H to rotate with respect to the core tray main body A1, for example, the hole 2 may be square and the fitting part h6 may be fitted into the square hole 2. Form into a prism.

In the above-described embodiment, an example in which one fitting portion h6 is formed in the connecting portion holding member H is shown. However, in the bottom plate 3 of the core tray main body A1 described above. It is also possible to form a plurality of fitting portions h6 of two or more in correspondence with the distance between the bored holes 2. In this case, since the connecting portion holding member H does not rotate with respect to the core tray main body A1, it is possible to form the hole portion 2 in a circular shape and the fitting portion h6 in a cylindrical shape.

As described above, the core tray main body A1 and the connecting portion holding member H are separately formed, and the connecting portion holding member H is provided in the hole 2 formed in the core tray main body A1.
Since the fitting portion h6 formed in the above is fitted and the connection portion holding member H is detachably attached to the core tray main body A1, the connection portion attached to the connection portion holding member H is connected. The section C can be attached to any position of the core tray body A1, and accordingly, the optical fiber core wire B can be attached.
It is possible to prevent an unreasonable tensile force from being applied to the connection portion C or the like.

The connecting portion holding member H has a bank portion h5.
Two connecting portion fitting space portions S1 for the connecting portion C1 having a small diameter are formed with the large diameter connecting portion h5 above the bank portion h5 being sandwiched by the substantially cylindrical main portion h2. Since the connecting portion fitting space S2 for the portion C2 is formed, the connecting portions C of the optical fiber core wires B having different outer diameters can be held.

[0029]

Since the present invention is constructed as described above, it has the following effects.

Since the core tray main body and the connecting portion holding member are provided separately, and the connecting portion holding member is detachably attached to the core tray main body, the optical fiber core wire, the connecting portion, etc. In addition, it is possible to prevent an unreasonable tensile force from being applied.

The connecting portion holding member has a bank portion sandwiched therebetween to form a connecting portion fitting space portion for a small diameter connecting portion, and a connecting portion fitting space portion for a large diameter connecting portion is provided above the bank portion. Since it is formed, the connecting portions of the optical fiber core wires having different outer diameters can be held.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an optical fiber core wire tray of the present invention.

FIG. 2 is a partially exploded perspective view of a core wire tray main body constituting the optical fiber core wire tray of the present invention.

FIG. 3 is a perspective view of a connecting portion holding member constituting the optical fiber core tray of the present invention.

FIG. 4 is a plan view of the optical fiber core wire tray of the present invention.

FIG. 5 is a side cross-sectional view showing a state in which the optical fiber core wire of the connecting portion holding member constituting the optical fiber core wire tray of the present invention is fitted.

FIG. 6 is a side cross-sectional view of a state where the optical fiber core wire of the connecting portion holding member which constitutes the optical fiber core wire tray of the present invention is also fitted.

FIG. 7 is a perspective view of a conventional optical fiber core tray.

[Explanation of symbols]

A: Optical fiber core tray B: Optical fiber core B1 ・ ・ ・ ・ ・ ・ Extra length part C ... Connection part H ... Connection holding member S1, S2 ... Connection space 2 ... hole 4, 5 ... Long side wall 6 ... Outlet entrance 7: Short side wall

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02G 3/26 N (72) Inventor Shinichi Matsuji 1-12-20 Tenjin, Chuo-ku, Fukuoka-shi, Fukuoka Kyushu communication network Incorporated (72) Inventor Tadashi Nakamura 4-3-8 Osaki, Shinagawa-ku, Tokyo Sankosha Co., Ltd. (72) Inventor Katsuhiro Kitano 4-3 Osaki, Shinagawa-ku, Tokyo Sankosha Co., Ltd. ( 72) Inventor Tatsumi Watanabe 4-3-8 Osaki, Shinagawa-ku, Tokyo, Sankosha Co., Ltd. (72) Inventor Takashi Katsuki 4-chome, Osaki, Shinagawa-ku, Tokyo F-term (3), Sankosia ) 2H038 AA21 CA37 CA52 4E352 AA08 AA15 BB05 BB10 CC02 CC08 CC11 CC52 CC56 DD02 DD05 DR02 DR13 DR17 DR24 DR34 DR37 DR40 DR45 FF09 GG12 GG15 GG18 5G363 AA07 BA10 BB01 DA15 DC08

Claims (2)

[Claims] 1. An optical fiber core characterized in that the core of the optical fiber tray and the holding member for the connecting portion are provided separately and the connecting member for holding the connecting portion is detachably attached to the main body of the optical fiber tray. Line tray. 2. The connecting part holding member is provided with a connecting part fitting space for a small-diameter connecting part with the bank part sandwiched therebetween, and above the bank part for a large-diameter connecting part. The optical fiber core wire tray according to claim 1, wherein a connection portion fitting space portion is formed.