JPH07218732A - Coated optical fiber connection box - Google Patents

Abstract

PURPOSE:To obtain the coated optical fiber connection box which surely and tightly fits an optical cable by arranging an optical cable fixation member and an excessive-length storage member individually one over the other in the box. CONSTITUTION:The coated optical fiber connection box is so constituted that the optical cable fixation member which fixes an optical cable H guided in the coated optical fiber connection box and the excessive-length storage member 10 which stores excessive-length parts of coated optical fibers h1 and h2 are discriminated and stacked vertically in two stages. Therefore, a degree of freedom is obtained in the length direction of the optical cable H of the optical cable fixation member and while distances from optical cable guide-in openings 31a, 31b, and 31c of the box body 30 to the excessive-length storage part are secured, the box body 30 is reduced in size. Further, the reliability of the gripping of the optical cable H by the optical cable fixation member is improved, and the fitting of the optical cable to the coated optical fiber connection box is made secure and tight.

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 connection box for accommodating and organizing an optical fiber cable connection portion and an extra length portion in an optical cable.

[0002]

2. Description of the Related Art As an example of an optical cable, an optical fiber, a tension member for reinforcing the optical fiber arranged at the center of the optical fiber, and a damage to the optical fiber from external pressure are protected. There is an optical cable including a metallic protective sheath and a jacket that covers them. When processing an optical cable or the like having such a structure in the optical fiber cable connection box, the optical cable is pulled into the optical fiber cable connection box body, and the outer cover is attached to the box body by an optical cable fixing tool provided in the box body. Firmly fix it, peel off the jacket of the tip from the cable fixture for a predetermined length, further cut the protective sheath, ground it as necessary, and fix the tension member to the tension member fitting tool. The optical fiber is stored in the optical fiber connection box so that the optical fiber is stored in the extra length storage portion.

[0003]

The optical fiber cable connection box integrally arranged on the overhead optical cable line has various weather conditions.
It is necessary to firmly attach the optical cable so that other factors can be dealt with, and for that purpose, the optical fiber connection box is provided with an optical cable fixing tool and a tension member attaching tool along the longitudinal direction of the optical cable. It is necessary to lengthen the length from the optical cable introduction port of the optical fiber cable connection box to the extra length storage part to some extent so that the optical fiber cable will not be bent excessively. However, there is a problem in that the size of the optical fiber connection box becomes large. Further, as described above, the dimension along the longitudinal direction of the optical cable of the optical fiber cable connection box becomes large and the optical fiber cable connection box becomes large. Therefore, there is a problem that it is necessary to separately manufacture the box body of the optical fiber connection box and the box body of the metal cable connection box.

An object of the present invention is to solve the problems of the above-mentioned conventional optical fiber connection box, and the first object is to provide a small optical fiber connection box which is excellent in storage efficiency and workability. A second object of the present invention is to provide an optical fiber connection box having a box body that can be used in common with a metal cable connection box.

[0005]

In order to achieve the above-mentioned object, the present invention provides an optical fiber splicing box in which an optical cable fixing member and a surplus length accommodating member are separately arranged in a vertical direction in a box body. Also, the optical cable fixing member and the extra length storage member are separately arranged in the vertical direction in the box body, and the optical cable fixing member is arranged in the lower stage and the extra length storage member is arranged in the upper stage.

[0006]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples without departing from the gist of the present invention.

First, FIG. 1, which is a plan view of the optical cable fixing member arranged in the optical fiber connection box of the present invention, is arranged above the optical cable fixing member arranged in the optical fiber connection box. The optical cable fixing member and the extra length storage member will be described with reference to FIG. 2 which is a plan view of the extra length storage member and FIG. 3 which is a front view of the extra length storage member.

Reference numeral 1 is an optical cable fixing member, and this optical cable fixing member 1 is a substrate 2 made of a flat metal material.
Optical cable retainers 3 and 4 to which appropriate fasteners for fixing an optical cable (not shown) are screwed are provided on the opposite short sides (both left and right in FIG. 1) of the substrate 2. It is set up. Further, 5 and 6 are screw holes formed in the substrate 2 for attaching the optical cable fixing member 1 to the optical fiber connecting box described later.

In FIG. 2, reference numeral 10 denotes an extra length accommodating member. The extra length accommodating member 10 has a flat plate-shaped insulative substrate 11, and substantially the center of opposing long side 11a, 11b of the substrate 11. In the portion, the overhanging portions 12a, 12 having a substantially rectangular shape are respectively provided.
b is extended. Reference numerals 13a and 13b denote sidewalls provided upright along the periphery of the substrate 11, and the protruding portions 12a, 1b.
Although the side walls 13a and 13b are not provided upright in the vicinity where 2b is provided, the overhanging walls 14a and 1b are provided at the peripheral portions of the overhanging portions 12a and 12b parallel to the long side 11a and 11b of the substrate 11.
4b is provided upright, and both ends of the overhanging walls 14a and 14b partially overlap with both ends of the side walls 13a and 13b. Then, the side walls 13a ′, 1 along the long side 11a, 11b of the substrate 11 of the side walls 13a, 13b.
Optical fiber introduction ports 15a, 15b, 15c, 15d are formed by the gaps formed by 3b ', 13a ", 13b" and the overhanging walls 14a, 14b, respectively.

The bent portions of the wound optical core wires 16a and 16b have a radius of curvature equal to or larger than a predetermined radius of curvature so that the extra length of the optical core wire wound on the extra length accommodation member 10 is not excessively bent. Is a fan-shaped guide for guiding the optical fiber and is arranged near the short side 11a ′, 11b ′ side of the substrate 11. Further, 17a and 17b are connection portion holders for holding the optical fiber connecting portions arranged near the projecting portions 12a, 12b in the substantially central portion of the extra length storage member 10, and the connection portion holder 17a. , 17b have a concave portion in which the optical fiber connecting portion can be elastically held, and are formed of an elastic member such as rubber, synthetic resin or metal plate.

Reference numerals 18a and 18b denote the short side 1 of the substrate 11.
1a ', 11b' is a pedestal disposed on the back surface of the mounting pieces 19a, 19b extended, when the extra length storage member 10 is attached above the optical cable fixing member 1 by the pedestals 18a, 18b, It is configured such that a space in which an optical cable can be arranged can be formed between the optical cable fixing member 1 and the extra length storage member 10. Also, the pedestals 18a, 18
In b, a through hole 20 penetrating the mounting pieces 19a, 19b.
a, 20b are bored, and the through holes 20a, 20
By passing an appropriate fastener such as a screw or a bolt through b, the extra length storage member 10 can be attached to the box body of the optical fiber connection box described later.

FIG. 4 is a plan view showing how the above-mentioned optical cable fixing member 1 is attached to the box body 30 of the optical fiber connection box, and FIG. 4 and the attaching state of the extra length storage member 10 to the box body 30 are shown. A mounting state of the box body 30 of the optical fiber cable connection box, the optical cable fixing member 1 and the extra length storage member 2 to the box body 30 will be described with reference to FIG. 5, which is a plan view.

Reference numeral 30 denotes a metallic box which constitutes the optical fiber cable connection box, and a cover (not shown) is usually covered to prevent rainwater and the like from entering the box 30. .
Further, the side walls 30a, 30b facing each other of the box body 30 are provided with an appropriate number of optical cable introducing ports 31a, 31b, 31c. Further, although not shown, the box body 30 is appropriately provided as necessary. Optical cable inlets 31a, 31b, 3
The side walls 30a 'and 30b' where 1c is not provided,
A distribution port is provided for distributing the optical fibers introduced from the optical cable introducing ports 31a, 31b, 31c to users by changing the connection.

As shown in FIG. 4, the optical cable fixing member 1 is provided with appropriate fasteners 3 such as screws or bolts in screw holes 7 and 8 formed in the substrate 2 of the optical cable fixing member 1.
By passing the optical cables 2a and 32b, the side of the substrate 2 on which the optical cable retainers 3 and 4 are not disposed is the side wall 30 of the box body 30 on which the optical cable introduction ports 31a and 31b are not provided.
It is attached to the inside of the box body 30 so as to be located on the a ', 30b' side. Above the optical cable fixing member 1 mounted in the box body 30 shown in FIG.
Is attached to the inside of the box body 30 via the pedestals 18a and 18b to form an optical fiber connection box in which a space is formed between the optical cable fixing member 1 and the extra length storage member 10 located below. . In FIG. 4, 33a, 33b, 3
c and 33d are frame portions extended to the box body 30, and the frame portion 3
Mounting hole 3 formed in 3a, 33b, 3c, 33d
By inserting a suitable fastener such as a bolt into 3a ', 33b', 33c ', 33d', a lid (not shown) can be attached.

Next, an example of the optical cable and optical fiber storage means will be described with reference to FIG. 6 which is a plan view of the optical fiber connection box in which the optical cable and the optical fiber are stored.

The optical cable H is introduced from the cable introduction port 31b, sandwiched between a fixture (not shown) and the optical cable retainer 4, and firmly attached to the optical cable fixing member 1. The optical cable H attached to the optical cable retainer 4 is peeled off by a predetermined length to expose the optical fiber lines h ₁ and h ₂ to the exposed optical fiber lines h ₁ and h ₂ . At least half a turn or more is arranged on the substrate 2 of the optical cable fixing member 1 by covering the protective tube A, and then the optical fiber h ₁ ,
The optical fiber cable inlet port 15 of the extra length storage member 10 mounted above the optical cable fixing member 1 by raising h ₂ diagonally upward
Protective tube A in which optical fibers h ₁ and h ₂ are inserted by c
And the optical fibers h ₁ and h ₂ are arranged on the extra length storage member 10. At this time, Hikarikokorosen h _1, h ₂ is, Hikarikokorosen h _1, h
_{Due to} the elasticity of ₂ and the gripping force of the protective tube A sandwiched by the optical fiber introduction port 15c, the optical fiber introduction port 1
Held at 5c.

Next, an appropriate number of turns are made between the fan-shaped guides 16a and 16b on the extra length storage member 10, and the optical fiber connecting portion is held by the connecting portion holders 17a and 17b. ₁ and h ₂ are covered with a protective tube B, which is led out from the optical cable introduction port 31a, and the optical cable fixing member 1 disposed below the extra length storage member 10.
Disposed above at least a Hikarikokorosen h _1, h _2, wound more than half a volume, as in the optical cable H introduced from the cable introducing port 31b described above, the optical core h derived from the optical cable inlet 31a _The optical cable H having ₁ and h ₂ is sandwiched between a fixture (not shown) and the optical cable retainer 3 and firmly attached to the optical cable fixing member 1. In addition,
The optical cable H introduced from the optical cable introduction port 31b into the optical fiber cable connection box is reconnected by a connecting tool, and if necessary, the optical cable H is provided in the optical cable introduction port 31c or a lower portion of the optical fiber cable connection box (not shown). It may be derived from the exit.

According to the present invention, the optical fiber cable connection box accommodates the optical cable fixing member 1 for fixing the optical cable H introduced into the optical fiber cable connection box and the extra length portions of the optical fiber cables h ₁ and h _2. The length of the optical cable H of the optical cable fixing member 1 is different from the length of the optical cable H of the optical cable fixing member 1 because the optical cable fixing member 1 and the extra length storing member 10 are vertically stacked in two stages. The degree of freedom is obtained, and the box 3
The box body 30 can be downsized while ensuring the distance from the optical cable introduction ports 31a, 31b, 31c of 0 to the extra length storage portion, and the optical cable fixing member 1
The reliability of gripping the optical cable H due to is improved.

As described above, the optical cable fixing member 1 and the extra length storing member 10 are separately provided in the vertical direction and arranged in two stages, so that the optical cable is fixed on the cable fixing member 1 and the extra length is provided. Since a part of the extra length portions of the optical fiber lines h ₁ and h ₂ arranged on the storage member 10 can be arranged on the cable fixing member 1, the optical fiber cable connection box can be downsized.

[0020]

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

Since a sufficient distance can be obtained from the optical cable introduction port of the optical cable to the extra length storage member, the optical cable can be securely and firmly attached to the optical fiber connection box. Further, since the optical fiber introduction port for sandwiching the optical fiber is provided in the extra length storage member, it is not necessary to provide a special optical fiber gripping portion, and the optical fiber can be very easily gripped. Furthermore, since the optical cable fixing member and the extra length storage member are separately arranged in the vertical direction inside the optical fiber cable connection box, the optical fiber cable connection box can be made compact without reducing the storage efficiency of the optical cable and the optical fiber cable. It is possible to reduce the manufacturing cost of the optical fiber cable connection box or simplify the management of the optical fiber cable connection box.

[Brief description of drawings]

FIG. 1 is a plan view of an optical cable fixing member of an optical fiber cable connection box of the present invention.

FIG. 2 is a plan view of an extra length storage member arranged above the optical cable fixing member of the present invention.

FIG. 3 is a front view of an extra length storage member arranged above the optical cable fixing member of the present invention.

FIG. 4 is a plan view showing how the optical cable fixing member is attached to the box body.

FIG. 5 is a plan view showing how the extra length storage member is attached to the box body.

FIG. 6 is a plan view of an optical fiber connecting box in which an optical cable and an optical fiber are stored.

[Explanation of symbols]

 1 ・ ・ ・ ・ ・ ・ Optical cable fixing member 5, 6 ・ ・ ・ ・ ・ ・ Optical cable retainer 10 ・ ・ ・ ・ ・ ・ Extra length storage member 30 ・ ・ ・ ・ ・ ・ ・ Box

Claims (2)

[Claims] 1. An optical fiber cable connection box, wherein an optical cable fixing member and a surplus length storage member are separately arranged in a vertical direction in a box body. 2. An optical cable fixing member and an extra length accommodating member are separately arranged in a vertical direction in a box body, and an optical cable fixing member is arranged in a lower stage and an extra length accommodating member is arranged in an upper stage. Core connection box.