JP3896508B2 - Information outlet system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information outlet system, and more particularly, to an information outlet system provided with an information outlet that is compact and has good workability.
[0002]
[Prior art]
Recently, as part of the development of information infrastructure, construction of an information outlet system has been promoted to transmit data such as data for monitoring roads, rivers and dams, and images of disasters such as typhoons from the site in real time. It has been.
[0003]
Conventionally, as this type of information outlet system, a configuration as shown in FIG. 11 is known. In the figure, a trunk optical fiber cable 1 constituting an optical fiber network is laid along the route in a main national road, river, or the like, and the trunk optical fiber cable 1 is branched via a closure 2. A fiber cable 3 is connected. In addition, information outlets 4 are erected on the ground such as the national roads and rivers along the longitudinal direction of the trunk optical fiber cable 1 with an interval of, for example, about 1 km. An optical outlet 5 for connecting a terminal of the branched optical fiber cable 3 is provided.
[0004]
Therefore, in the information outlet system having such a configuration, one end of an optical fiber cable (hereinafter referred to as a “reel optical fiber cable”) 7 wound on the reel 6 is connected to the optical outlet 5 to cause damage. It is possible to transmit data such as video and sound obtained by imaging the disaster situation of the ground in real time. A portable terminal device 8 is connected to the other end of the reel optical fiber cable 7.
[0005]
FIG. 12 and FIG. 13 are explanatory diagrams showing the connection status between the branch optical fiber cable and the reel optical fiber cable in the information outlet. In these drawings, the same reference numerals are given to the portions common to FIG. 12 and 13, a straight connector (hereinafter referred to as “I-type connector”) C1 or an L-shaped connector (hereinafter referred to as “L-type connector”) is attached to the end of the branch optical fiber cable 3 raised from the ground. C2 is connected, and the loop connector C3 is normally connected to the I-type connector C1 or the L-type connector C2.
[0006]
On the other hand, an L-type connector C4 is connected to the end of the reel optical fiber cable 7, and this L-type connector C4 is connected to the I-type connector C1 or the L-type connector C2 of the branch optical fiber cable 3 as follows. ing. That is, first, in the case shown in FIG. 12, the opening / closing lid 42 provided on the housing 41 constituting the information outlet 4 is opened, the loop connector C3 is removed, and then the reel 6 (see FIG. 11) is wound. One end of the reel optical fiber cable 7 is drawn out from the reel 6 and introduced into the opening 43 of the housing 41 from the horizontal direction, and the L-type connector C4 is plugged into the I-type connector C1.
[0007]
In FIG. 13, both the branch optical fiber cable 3 and the reel optical fiber cable 7 fed out from the reel are vertically raised from the lower part of the housing 41, and each L-shaped connector C <b> 2 in the housing 41. , C4 is opposed and plug-in connection is made.
[0008]
[Problems to be solved by the invention]
However, in these connection methods, in the narrow housing 41, the connector C1 (C2) of the branch optical fiber cable 3 and the connector C4 of the reel optical fiber cable 7 are opposed to each other, and the axes of both the connectors C1 (C2) and C4 are set. Since plug-in connections must be made after matching, there is a problem that plug-in connection work becomes complicated. Moreover, in what connects the connectors C1 and C2 to the terminal of the branch optical fiber cable 3, unless the length from the closure 2 to the information outlet 4 is determined, the length of the branch optical fiber cable 3 is not determined. As a branching optical fiber cable 3, a regular optical fiber cable cannot be used. As a result, the assembly work of the information outlet is greatly delayed, leading to a delay in delivery. Further, each connector C 1 ( Since C2), C4, and the branch optical fiber cable 3 must be fixed to the inner wall of the housing 41 via gripping brackets (not shown), there is a problem that the number of parts increases and the assembly becomes more complicated. It was.
[0009]
In addition, in the case shown in FIG. 12, there is a problem that the open / close lid 42 cannot be closed because the reel optical fiber cable 7 becomes an obstacle. In the case shown in FIG. 13, the horizontal portions of both connectors C2 and C4 are Since they are arranged to face each other, there is a problem that the housing 41 is increased in size according to the length of the horizontal portion.
[0010]
For this reason, an I-type connector is connected to the ends of the branch optical fiber cable and the reel optical fiber cable, the branch optical fiber cable is bent inside the housing, and the direction of the outlet is changed. A method of plug-in connection of a connector to an I-type connector of a reel optical fiber cable has also been devised, but in this connection method, an allowable bending radius of the branch optical fiber cable (more than 10 times the outer diameter of the branch optical fiber cable) ) Must be secured, and there is a problem that it cannot be applied to a small information outlet. In other words, if the outer diameter of the branched optical fiber cable is 10 mm, a housing space of 200 mm or more is required as a housing. Therefore, it is applied to information outlets such as monument type, pedestal type, and kilopost type with a housing space of 200 mm or less. There was a difficulty that was not possible.
[0011]
The present invention has been made to solve such a problem, and an object of the present invention is to provide an information outlet system having an information outlet that is compact and has good workability.
[0012]
[Means for Solving the Problems]
In order to achieve this object, an information outlet system of the present invention includes a trunk optical fiber cable laid along a laying route, a branched optical fiber cable branched from the trunk optical fiber cable, and a reel fed out from a reel. In an information outlet system comprising an optical fiber cable and an information outlet for connecting a terminal of a branch optical fiber cable and a terminal of a reel optical fiber cable, the information outlet includes a splice box in the housing, and the splice box is provided on the lower side or side. A branch optical fiber cable introduction port and a connector for connecting the branch optical fiber cable and the reel optical fiber cable are provided on the side, and the end of the branch optical fiber cable is watertightly introduced to the introduction port. Stepped and exposed terminal Allowed optical fiber is connected to a connector provided in the splice box lower portion or the side portions through the excess length wound in a ring shape in a splice box, terminal reel optical fiber cable, housing This is characterized in that it is introduced from an insertion opening provided at the lower part of the opening / closing lid and is connected to the connector from the outside of the splice box.
[0013]
Moreover, the optical fiber core wire in the information outlet system of the present invention is characterized in that it is fused and connected to another optical fiber core wire connected to the connector.
[0014]
Further, the information outlet system of the present invention is characterized in that the splice box introduction port is disposed at a portion facing the end of the optical fiber cable raised from the lower part of the splice box.
[0015]
The connector of the splice box in the information outlet system according to the present invention is characterized in that it is arranged at a portion facing the end of the reel optical fiber cable fed toward the lower part of the splice box.
[0016]
The splice box in the information outlet system of the present invention is characterized in that it is attached to the inner wall of the housing.
[0017]
Furthermore, the splice box in the information outlet system of the present invention is characterized in that it is attached to the front of the bottom of the box.
[0018]
According to the information outlet system of the present invention, the optical fiber core wire of the branch optical fiber cable introduced into the splice box and the optical fiber core wire connected to the connector are fusion-bonded in the splice box. The splice box can be made small, and this splice box can be accommodated in the housing of the information outlet as it is. Therefore, according to the present invention, the present invention can be applied to monument type, pedestal type, and kilopost type information outlets having a storage space of 200 mm or less. Also, since the branch optical fiber cable and the splice box are configured separately, the installation of the branch optical fiber cable and the installation of the splice box can be performed separately, and a single splice box can be installed. Since it only needs to be attached to the inner wall of the housing, the information outlet can be easily assembled. Therefore, according to the present invention, the installation work of the information outlet can be performed by attaching a single splice box that is compact, and therefore, the delivery time can be shortened. In the information outlet system of the present invention, since the reel optical fiber cable I-type connector can be introduced from the insertion port provided in the information outlet, the reel optical fiber cable terminal is connected to the information outlet. The lid can be closed.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments to which the information outlet system of the present invention is applied will be described with reference to the drawings.
[0020]
FIG. 1 is a cross-sectional view of a branched optical fiber cable, and FIG. 2 is a front view of an information outlet into which a terminal of the branched optical fiber cable is introduced. In FIGS. 1 and 2 and FIGS. 3 to 10 described below, portions common to FIGS. 11 to 13 are denoted by the same reference numerals.
[0021]
In FIG. 1, a branch optical fiber cable 3 has a tension member 31 such as a steel wire at the center, a spacer 30 having four spiral grooves 32 on the outer peripheral portion, and one each in each spiral groove 32. Optical fiber core wires 3 a, 3 b, 3 c, 3 d, and a tape winding 33 and a jacket 34 such as a LAP sheath, which are sequentially provided on the outer periphery of the spacer 30. Here, each of the optical fiber cores 3a, 3b, 3c, and 3d includes, for example, an optical fiber mainly composed of glass such as quartz, and a primary coating layer and a secondary coating that are sequentially coated on the outside of the optical fiber. And a colored layer coated with a nylon resin. Of the four optical fiber cores 3a, 3b, 3c, and 3d, the two optical fiber cores 3a and 3b are upstream of the trunk optical fiber cable via the closure 2 (see FIG. 11). The other two optical fiber cores 3c and 3d are connected to the downstream optical fiber core (not shown).
[0022]
Next, as shown in FIG. 2, the information outlet 4 includes a cylindrical handling main body 41 erected on an gantry 10 made of, for example, ready-mixed concrete via an anchor bolt (not shown), and the like. A hemispherical cover 40 that closes the upper portion of the handling main body 41 is provided, and the handling main body 41 and the cover 40 are integrally formed of, for example, a concrete material that is formed by centrifugally mixing a glass cullet material. An opening / closing lid 42 is provided on the upper portion of the handling body 41, and an insertion port 44 is provided on the lower portion of the opening / closing lid 42. A kilometer sign board 45 and an additional information board 46 are attached to the outer periphery of the upper portion of the handling main body 41.
[0023]
FIG. 3 is an explanatory view of a splice box housed in the handling main body. 3 (a), 3 (b), and 3 (c), a splice box 11 includes a substantially rectangular splice box body 12 and a splice box lid that covers the front surface of the splice box body 12 with a rubber packing 14 in a watertight manner. 13 and a frame-shaped mounting plate 15 is attached to the bottom front surface of the splice box main body 12. Further, channel-like extra length storage portions 16a and 16b are provided on both sides of the mounting plate 15 so as to face each other, and a tension member clamp 17 is provided on the upper portion. Furthermore, an inlet (not shown) and an outlet (not shown) are provided in the lower side 12a of the splice box body 12 apart from each other, and a cable clamp 18 is attached to the inlet in a watertight manner. The connector 19 is attached in a watertight manner.
[0024]
As shown in FIG. 4, the cable clamp 18 is attached to the introduction port of the splice box main body 12, a cable clamp main body 18a, a cylindrical cable presser portion 18b inserted into the cable clamp main body 18a, and a cable presser portion 18b. And a cap 18d that covers the packing 18c and the cable retainer 18b and is screwed onto the outer periphery of the cable clamp body 18a. One end of the cable retainer 18b has a diameter. The cap 18d is provided with an insertion hole 18f into which the end of the branch optical fiber cable 3 can be inserted.
[0025]
As shown in FIG. 5, the connector 19 includes a connector body 19a that is watertightly attached to an outlet of the splice box body 12 via an O-ring (not shown). The connectors 19b are equally arranged in the circumferential direction. Further, a plug receiving port (not shown) is provided at the lower end of each connector 19b, and an optical fiber core wire (hereinafter referred to as "connector side optical fiber core wire") 3a 'of about 1 m is provided at the upper end portion. 3b ', 3c', and 3d 'are connected.
[0026]
Next, a method for watertightly introducing the end of the branched optical fiber cable 3 into the inlet of the splice box body 12 will be described.
[0027]
First, the cable clamp body 18a is attached to the introduction port of the splice box body 12, and is watertightly fixed to the introduction port via an O-ring and a nut (not shown). Next, the cap 18d, the packing 18c, and the cable pressing portion 18b shown in FIG. 4 are sequentially fitted and inserted into the end side of the branched optical fiber cable 3. Then, as shown in FIG. 5, the end of the branched optical fiber cable 3 into which the cap 18d, packing 18c, and cable holding portion 18b are inserted is introduced into the cable clamp body 18a, and the cable holding portion 18b and packing 18c are connected. The cap 18d is screwed onto the threaded portion of the cable clamp body 18a by pulling back to a predetermined position. As a result, the end of the branched optical fiber cable 3 is introduced and fixed in a watertight manner at the inlet of the splice box body 12.
[0028]
Here, the end of the branch optical fiber cable 3 is stepped off to expose the tension member 31 and the spacer 30, the tip end portion of the tension member 31 is held by the tension member clamp 17, and the optical fiber core wire (hereinafter referred to as an optical fiber core wire) (Referred to as “branch-side optical fiber core wire”) 3a, 3b, 3c, and 3d. Then, the end portions of the branch side optical fiber cores 3a, 3b, 3c, and 3d and the corresponding end portions of the connector side optical fiber core wires 3a ′, 3b ′, 3c ′, and 3d ′ are butted. Are fused and connected via an optical fiber fuser (not shown), and a protective tube 20 made of a heat-shrinkable tube or the like is attached to the outer periphery of the fusion-bonded portion. The fusion-bonded optical fiber core wire is wound in a ring shape, its upper and lower portions are spanned between a pair of support columns 21a and 21b, and both side portions thereof are paired with a pair of extra length storage portions 16a and 16b. Inserted.
[0029]
As shown in FIG. 6, the splice box 11 having such a configuration is attached to the inner wall of the housing main body 41 constituting the information outlet 4 via a mount 47, and a loop connector C3 is plugged into the connector 19. Is done.
[0030]
Next, a method for connecting the end of the reel optical fiber cable to the connector of the information outlet will be described.
[0031]
First, an I-type connector C5 is connected to the end of the reel optical fiber cable. Next, as shown in FIG. 7, the opening / closing lid 42 is opened, and the loop connector C3 (see FIG. 6) is removed from the connector 19 of the splice box 11. Next, the reel optical fiber cable 7 is unwound from the reel 6 carried into the site, and the I-type connector C5 is introduced into the insertion port 44 of the information outlet 4. Then, the end of the reel optical fiber cable 7 is raised upward from the introduction portion, and the I-type connector C5 is plugged into the connector 19. After the above operation is completed, the opening / closing lid 42 is closed as shown in FIG. As a result, data such as video and audio obtained by imaging the disaster situation in the disaster area can be transmitted from the information outlet 4 in real time.
[0032]
As described above, in the information outlet system including the information outlet according to the present invention, the optical fiber core wire of the branched optical fiber cable introduced into the splice box and the optical fiber core wire connected to the connector are fused in the splice box. Since the splice box is connected, the splice box can be made small, and the splice box can be accommodated in the housing of the information outlet as it is. Also, since the branch optical fiber cable and the splice box are configured separately, the installation of the branch optical fiber cable and the installation of the splice box can be performed separately, and a single splice box can be installed. Since it only needs to be attached to the inner wall of the housing, the information outlet can be easily assembled. In the information outlet system of the present invention, since the reel optical fiber cable I-type connector can be introduced from the insertion port provided in the information outlet, the reel optical fiber cable terminal is connected to the information outlet. The lid can be closed.
[0033]
9 and 10 show another embodiment of the splice box according to the present invention. In these drawings, the same reference numerals are given to the same parts as those in FIGS. 3 to 8, and detailed description thereof is omitted.
[0034]
First, in the embodiment shown in FIG. 9, a horizontally long splice box 11 ′ is used instead of the vertically long splice box 11 shown in FIG. 3. In this embodiment, although the lateral width of the splice box 11 'is slightly larger than that of the splice box 11 shown in FIG. 3, it can be made smaller than a conventional information outlet using I and L type connectors.
[0035]
Next, in the embodiment shown in FIG. 10, the above-mentioned splice box 11 is attached to the bottom front surface of the box body 22, and a lid (not shown) is attached to the opening in a watertight manner. A pair of attachment members 23a and 23b are attached to the back surface of the box body 22 so as to be separated from each other, and are attached to support walls such as an inner wall of a hand hole or a power pole (not shown) via the attachment members 23a and 23b. Yes. In FIG. 10, 24 is an AC 100V outlet, 25 is a breaker, and 26 is a waterproof member.
[0036]
In this embodiment, the box body 22 including the splice box 11 can be directly attached to the inner wall of the handhole, the utility pole, or the like.
[0037]
In the above-described embodiment, the case where the branch side optical fiber core wire is fused and connected to the connector side optical fiber core wire is described. However, the present invention is not limited to this. You may connect a branch side optical fiber core wire to a connector as it is, without connecting a core wire. Further, the introduction port and the connector are not limited to those provided in the lower side portion of the splice box. For example, the introduction port may be provided in the lower side portion of the splice box and the connector may be provided in the side portion of the splice box.
[0038]
【The invention's effect】
As is apparent from the above description, according to the information outlet system of the present invention, the optical fiber core wire of the branched optical fiber cable introduced into the splice box and the optical fiber core wire connected to the connector are placed in the splice box. Since the splice box is connected, the splice box can be made small, and the splice box can be accommodated in the housing of the information outlet as it is. Therefore, according to the present invention, the present invention can be applied to monument type, pedestal type, and kilopost type information outlets having a storage space of 200 mm or less. Also, since the branch optical fiber cable and the splice box are configured separately, the installation of the branch optical fiber cable and the installation of the splice box can be performed separately, and a single splice box can be installed. Since it only needs to be attached to the inner wall of the housing, the information outlet can be easily assembled. Therefore, according to the present invention, the installation work of the information outlet can be performed by attaching a single splice box that is compact, and therefore, the delivery time can be shortened. In the information outlet system of the present invention, since the reel optical fiber cable I-type connector can be introduced from the insertion port provided in the information outlet, the reel optical fiber cable terminal is connected to the information outlet. The lid can be closed.
[0039]
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a branched optical fiber cable according to the present invention.
FIG. 2 is a front view of an information outlet according to the present invention.
FIG. 3 is an explanatory view of a splice box in the present invention, FIG. 3 (a) is a front view of the splice box body, FIG. 3 (b) is a side view of the splice box, and FIG. 3 (c) is a bottom view of the splice box. .
FIG. 4 is an exploded perspective view of a cable clamp disposed at a terminal of a branched optical fiber cable according to the present invention.
FIG. 5 is an explanatory diagram showing a connection state between a splice box and a branch optical fiber cable according to the present invention.
FIG. 6 is an explanatory view showing a state of attachment of the splice box to the housing according to the present invention.
FIG. 7 is an explanatory diagram showing a connection state of a reel optical fiber cable to a splice box according to the present invention.
FIG. 8 is an explanatory view showing a state in which the opening / closing lid of the information outlet according to the present invention is closed.
FIG. 9 is a front view of a splice box body according to another embodiment of the present invention.
FIG. 10 is an explanatory view showing a state in which the splice box according to the present invention is housed in the box.
FIG. 11 is a schematic diagram of an information outlet system.
FIG. 12 is an explanatory diagram showing a connection status of a conventional reel optical fiber cable to an information outlet.
FIG. 13 is an explanatory diagram showing a state of connection of a conventional reel optical fiber cable to an information outlet.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Trunk optical fiber cable 3 ... Branch optical fiber cable 4 ... Information outlet 19 ... Connector 11 ... Splice box 3a-3d ... Optical fiber core wire (branch side optical fiber core wire) )
3a'-3d '... Optical fiber core wire (connector side optical fiber core wire)

Claims (6)

A trunk optical fiber cable laid along the laying route, a branched optical fiber cable branched from the trunk optical fiber cable, a reel optical fiber cable fed out from a reel, a terminal of the branched optical fiber cable, and the reel light In an information outlet system comprising an information outlet for connecting a fiber cable terminal,
The information outlet includes a splice box in the housing,
The splice box has an inlet for the branched optical fiber cable and a connector for connecting the branched optical fiber cable and the reel optical fiber cable to a lower side or a side part,
The end of the branch optical fiber cable is watertightly introduced into the inlet,
The optical fiber core wire exposed by stepping off the end of the branched optical fiber cable was provided on the lower side or the side of the splice box via a surplus length wound in a ring shape in the splice box. Connected to the connector,
The reel optical fiber cable terminal is introduced from an insertion port provided at a lower part of the opening / closing lid of the housing and connected to the connector from the outside of the splice box.   2. The information outlet system according to claim 1, wherein the optical fiber core wire is fusion-connected to another optical fiber core wire connected to the connector.   The information outlet system according to claim 1 or 2, wherein the introduction port is arranged at a portion facing a terminal of the optical fiber cable raised from a lower portion of the splice box.   3. The information outlet system according to claim 1, wherein the connector is disposed at a portion facing a terminal of the reel optical fiber cable fed toward a lower portion of the splice box.   The information outlet system according to any one of claims 1 to 4, wherein the splice box is attached to an inner wall of the housing.   The information outlet system according to any one of claims 1 to 4, wherein the splice box is attached to the front surface of the bottom of the box.

Images