JP4048314B2 - Optical communication cable termination box storage box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a termination box used for wiring the end of an optical communication cable to various devices inside a building. Box containing In connection with indoor wiring in which PCs are networked with a hub to which an optical communication cable is connected, a termination box provided at the end of the optical communication cable and a hub box that is an outer box of the hub are integrated. Storage box About.
[0002]
[Prior art]
In recent years, communication using an optical communication cable is becoming the core of many communication networks such as an intranet, the Internet, a cable TV, and a mobile phone network due to high-speed and large-capacity data transmission capabilities. In particular, with the explosive growth of computer networks and the rapid spread of wireless communication means such as mobile phones, the demand for them has been increasing year by year, and optical communication cables have been installed everywhere.
[0003]
For example, in a clean room, a server room, and the like, it is widespread that a client computer and a server computer or precision equipment are interconnected via a hub to form a network. In this case as well, there is an increasing number of wiring systems that use an optical communication cable with less noise as a transmission path and connect the client and server with the optical communication cable. A termination box, which will be described later, is provided at the end of the optical communication cable, and the termination box and the distribution board are normally installed independently on the upper wall surface of the room. In addition, the hub to which the optical communication cable is connected is arranged as close to the termination box as possible in consideration of the arrangement of the computer and the indoor environment.
[0004]
[Problems to be solved by the invention]
By the way, since an optical communication cable is essentially a bundle of glass fibers and is not a conductor, it has heretofore been considered almost free from damage such as lightning. However, with the spread of wireless communication means, when the relay station antenna is built everywhere, lightning damage reports are frequently sent to this station. Naturally, although the antenna itself is supposed to be protected against lightning, the cause of such lightning damage is that lightning is not only direct lightning damage to the antenna itself.
[0005]
That is, induced lightning caused by lightning strikes near the office building is guided to a tension member (iron core), messenger wire, or shield ground provided in the coaxial cable used for towing the optical communication cable and flashed. It was found that there was damage such as destruction of the distribution box (hereinafter referred to as termination box) of the office building to which the end of the optical communication cable was connected. Such damage may occur not only in the antenna relay station as described above but also in all places where the optical communication cable is laid.
[0006]
The tension member of an optical communication cable is a metal wire placed in the center of the cable because it cannot maintain its strength when pulling the cable or when fixing the end. is there. Conventionally, after the optical communication cable is pulled and laid, the end portion is cut open, the tension member is peeled off and screwed, and each trunk cable is held by a separate holding means and connected to a connector etc. Was. This trunk cable was fused with the optical communication cable with connector, and the fusion point was held by what is called a stopper, etc. A state occurs in which the wiring must be wired at an acute angle. As a result, damage such as the cable being cut by an external force such as an earthquake occurred.
[0007]
Also, in clean rooms and server rooms, the conventional method of installing termination boxes and distribution boards at the top of the wall surface, when workers perform extension branching or maintenance of optical communication cables, the worker must use a stepladder each time. Since it is necessary to work at a high place, it is difficult to perform operations such as extension branching and maintenance of optical communication cables. In particular, since an optical communication cable is vulnerable to bending, it is necessary to lay the optical communication cable so that the optical communication cable does not bend at an acute angle. Under such constraints, the wiring work of the optical communication cable becomes more difficult, and the conventional installation method generally has a problem that the work efficiency is not good. Further, in the conventional configuration, since the termination box, the hub (hub box), and the distribution board are individually installed, there is a problem that a large installation space is required.
[0008]
The present invention has been made in view of the above problems, and its object is to reliably hold the end of an optical communication cable, to prevent damage due to surge current caused by induced lightning, etc. The optical communication cable can be properly wired and the cable can be prevented from being broken, and the optical communication cable and the like can be easily wired and maintained, thereby saving space. It is to provide a termination box for an optical communication cable.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, at least two sections are defined, and a termination box of an optical communication cable is accommodated in one section, and the other section is disposed. Distributes the power supplied from the power line installed with the optical communication cable in the termination box of the optical communication cable. A distribution board and multiple ports are connected to each port. From the terminated optical communication cable Optical communication cable termination box containing a hub as a device to bundle optical fibers Storage box And the said storage box is attached to the outer side part of the desk, It is characterized by the above-mentioned.
[0010]
In the invention of claim 2, the optical communication cable termination box of claim 1 is provided. Storage box The crimping terminal of the optical communication cable electrically connected to the grounding means is composed of the insertion tube and a washer connected to the end of the insertion tube, and the end of the tension member for pulling the optical communication cable or the end of the messenger wire. The crimping terminal and the end portion are electrically connected to each other by being inserted into the insertion tube and caulking the insertion tube, and these joint portions are covered with an insulating material.
[0011]
According to a third aspect of the present invention, a power line is laid together with the optical communication cable in the storage box of the optical communication cable termination box according to the first or second aspect, and an electric device is provided. A power supply is provided, and a surge current induction circuit having an earth side terminal connected to the earth means and an induction side terminal electrically connected to the earth side terminal is provided, and the surge current induction circuit includes: Insulation is maintained while current of normal voltage is flowing, and once high voltage is applied, the insulation is broken and becomes low resistance. The induction side terminal of the surge current induction circuit is an electrical wiring that connects the power line and the electrical equipment. The crimp terminal connected to the end of the optical communication cable pulling tension member or messenger wire is connected to the ground side terminal of the surge current induction circuit. It is characterized in.
[0013]
Claim 4 In the invention of claim 1, claims 1 to 3 Optical communication cable termination box according to any of Storage box , A means for fixing the end portion of the tension member for pulling the optical communication cable, a stopper for holding a part of each trunk cable or a fusion point with the connector cable, and each trunk cable can be freely wound. It is characterized in that guide guides for a plurality of columns are erected.
[0014]
Optical communication cables are laid mainly in clean rooms, operating rooms, server rooms, building management rooms, etc. that manufacture semiconductors and chemicals, but of course can also be applied to high-rise apartments, schools, government offices, and the like. In the room, a computer or its peripheral devices are arranged, and these are connected by a cable via a hub. In addition, a desk (including a table) is provided in the room, and a storage box is attached to the side, rear, or lower part of the desk. The storage box is divided into at least two sections, one of which is used for a termination box, and the other is used for storing precision equipment such as a hub (hereinafter referred to as a hub box). In addition, a commercial power outlet may be provided inside the termination box.
[0015]
In the above configuration, the termination box and the hub box are arranged on the wall surface, the side part of the desk, the rear part or the lower part, so that the operator opens the storage case on the floor and directly connects the optical communication cable and the hub. Work and maintenance inspection work can be easily performed. Further, since the termination box and the hub box are integrated together in the storage case, the box can be reduced in size and size. In the case where the cable for the commercial power supply is provided in the termination box, a separate outlet is not required, so that space can be saved correspondingly.
[0016]
Also, when fixing the optical communication cable tension member, messenger wire, or shield ground in the termination box, make sure that the tip of the cable is not exposed, fix it to the surge current induction circuit, and then connect directly to the ground. did. That is, most of the conventional tension member fixing means are merely screwed in a state where the tip is exposed, and are not grounded. Therefore, it is considered that surge currents such as induced lightning had lost their place of fire and ignited and damaged the surrounding area. Therefore, in the present invention, without fixing the tip of the tension member or messenger wire, it is fixed by a crimping terminal or the like, and this is directly connected to the ground, and the joint portion with the crimping terminal is covered with an insulator. As a result, the surge current is released to the ground, and ignition is prevented by covering the insulator.
[0017]
Furthermore, a power line is laid along with the optical communication cable, and a power supply circuit for connecting peripheral devices such as a hub (HUB) is provided. Power is supplied to the power supply circuit through this power line, and a power supply circuit is provided in parallel therewith. Connect to the induction terminal of the surge current induction circuit. Incidentally, the surge current induction circuit shown here responds to a high voltage surge current at high speed and causes the surge current to flow to the ground side. As a result, when a surge current is generated, it does not flow to the peripheral device connected to the power supply circuit and escapes to the ground side.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described based on examples shown in the drawings. In this embodiment, the storage case is divided into two left and right chambers, the termination box and the hub box are stored separately, and this storage case is attached to the outer side of the work desk in the server room.
FIG. 1 is an overall configuration diagram for explaining a storage case for a termination box and a hub box according to the present invention, FIG. 2 is a structural view of a main part for explaining the storage case of FIG. 1, and FIG. FIG. 4 is a wiring diagram in the termination box and the hub box, FIG. 5 is a schematic diagram showing the basic form of the avoidance element, and FIG. 6 shows another embodiment of the avoidance element. FIG. 7 is a side view, FIG. 7 is a circuit diagram of an avoidance circuit, FIG. 8 is a schematic diagram showing another embodiment of the termination box, and FIG. 9 is a circuit showing a surge current induction circuit and an example of wiring therefor. FIG. 10, FIG. 10 is an enlarged side sectional view showing the tip of the optical communication cable, FIG. 11 is a perspective view showing another embodiment of the storage box, and FIG. 12 shows a plurality of termination boxes according to the present invention installed in the building. FIG. 13 is a schematic diagram illustrating a state in which the termination box of the present invention is installed in a plurality of buildings. A.
[0019]
【Example】
As shown in FIGS. 1 to 3, reference numeral 1 denotes a server room in a semiconductor manufacturing factory equipped with a workstation 18, and an air conditioner (not shown) is provided on the ceiling of the server room 1. A plurality of work desks 2 are installed at arbitrary positions in the server room 1, and leg portions of the work desk 2 are fixed to the floor surface, and a rubber mat 3 with stoppers for vibration isolation is attached.
[0020]
On the work desk 2, a client personal computer 4 with a stopper (not shown) for earthquake resistance is arranged. The client personal computer 4 is connected to a server personal computer 7 through a hub (conversion hub) 5 by an optical fiber 6. ing. The server personal computer 7 is arranged at a corner of the server room 1 or below one side of the work desk 2. The lower part of the server personal computer 7 is fixed by a stopper 8 so that the server 7 does not move due to an earthquake or the like. In addition, a cooling fan is provided in the upper part of the server 7, and a dust exhaust duct can be connected to this.
[0021]
A storage box 9 is attached to one side of the outer side of the work desk 2 at the right corner. As shown in FIG. 2, the interior of the storage box 9 is divided into two left and right chambers, and open / close doors 13 and 14 are attached to the respective chambers. In the left chamber of the storage box 9, a termination box 11 for connecting the terminal portion of the optical communication cable 10 is accommodated, and the termination box 11 has an airtight structure for preventing flooding. The optical communication cable 10 is formed by converging a plurality of optical fibers 6, and the plurality of optical fibers 6 are connected and extended by a termination box 11 and distributed as outgoing lines. On the other hand, a hub box 12 is stored in the right chamber of the storage box 9, and a hub 5 is provided in the hub box 12. The hub 5 has a plurality of ports and functions as a concentrator that bundles the optical fibers 6 connected to each port.
[0022]
In FIG. 4, reference numeral 16 denotes a distribution board of the optical communication cable 10 in the termination box 11. The tension member 15 of the optical communication cable 10 is fixed to the wiring board 16 with screws, and each optical fiber 6 is branched and connected to the port of the hub 5. A commercial power cable 17 is drawn into the wiring board 16, and a conductor 20 of the hub 5 is connected to an outlet 19 of the commercial power cable 17. In the figure, 21 and 22 are lightning arresters.
[0023]
The tension member 15 can be simply connected to a conventional ground wire, but is connected to the ground wire 23 via an avoidance circuit 21 described later as a more reliable measure against surge current. On the other hand, an avoidance circuit 22 is also provided between the commercial power supply 17 and the outlet 19, and this is also connected to the ground wire 24. As the avoidance circuit 21, a circuit using a circuit element 30 described later or a structure similar to the avoidance device 50 and the semiconductor element 55 can be applied. Further, when the avoidance circuit 21 is not used, the avoidance circuit 22 can be changed to the surge current induction circuit 60 of FIG. 8 and a surge current can be passed through the tension member 15 and the ground wire 24. In consideration of the case where the earth voltage rises, it is also possible to make a bypass ground from the ground terminal of the lightning arrester to the middle phase of the power source.
[0024]
As shown in FIG. 5A, the avoidance element 30 includes three first to third surge current reaction units 31, 33, 35 having the same configuration, and the terminals 32, 34, 36 are mutually connected. The terminals 34 and 36 are arranged close to each other with a gap therebetween. And the 1st surge current reaction part 31 is connected to the apparatus or circuit used as protection object, and the 2nd and 3rd surge current reaction parts 33 and 35 are connected to the earth wires 37 and 38 each provided separately. Yes. Therefore, when the surge current is from the device or the circuit side, arc discharge is performed from the terminal 32 to the terminal 34 and the terminal 36 to be grounded. However, in the case of a reverse surge current from the ground wire 37 or 38, arc discharge occurs only at terminals close to each other, and no discharge is generated at the terminal 32, so that surge current flows to the device or circuit side. There is no. Further, as shown in FIG. 5 (b), by changing the terminals 32, 34, and 36 to the shapes of the terminals 32a, 34a, and 36a each having an inclined portion at the terminal tip, a low voltage surge current can be changed to a high voltage. It is possible to handle up to the surge current. In addition to the shapes of the terminals 32a, 34a, and 36a, the shapes of the terminals 32, 34, and 36, as shown in FIG. 6, terminal parts 32d-1 to 32d-5 having protrusions with different lengths at the tips. It is possible to cope with low voltage surge current to high voltage surge current even if the terminal tip is undulated like the combination terminal 32D.
[0025]
FIG. 7 is a circuit diagram showing an example of the surge current avoidance circuit 21 or 22. As a basic circuit, commercial power sources L1 and L2 are drawn through a breaker 41, and a device 42 to be protected is connected to this, and a wiring 43 between the breaker 41 and the device 42 is prevented from a surge current. The avoider 50 is connected by a circuit line 45, which is grounded via a first ground line 53. Further, a bypass line 54 is provided between them, and a semiconductor element 55 is disposed on the bypass line 54. The avoidance device 50 is composed of avoidance elements 51 and 52 having high conductivity and directivity.
[0026]
When a surge current comes from the supply system of the commercial power sources L1 and L2, such as lightning, the avoidance elements 51 and 52 react immediately and the first ground wire via the circuit lines 44 and 45 and the avoidor 50 When the surge current is eliminated, the avoidance device 50 is cut off and the commercial power flows normally to the device 42 again. On the other hand, when an induced lightning occurs due to a lightning strike in the vicinity and tries to enter from the first ground wire through the ground, it does not flow to the avoider 50, and the bypass wire 54, the semiconductor element 55, Since it flows through the second ground La via the, the device 42 can be prevented from being damaged. When there is no surge current, the bypass line 54 is blocked by the semiconductor element.
[0027]
The avoidance circuit 21 is very effective as a countermeasure against induced lightning of the optical communication cable. That is, when guided lightning is guided to the tension member 15 of the optical communication cable 10, it is grounded to the ground wire 23 via the avoidance circuit 21. Further, the reverse flow of the induced lightning through each ground wire is grounded to the second ground La via the bypass wire 54 and the semiconductor element 55 as described above. Therefore, the wiring board 16 is fully equipped with a countermeasure against induced lightning including the conversion hub 5.
[0028]
Here, although another embodiment of the termination box will be described, the same components as those in the above embodiment will be described with the same reference numerals. The basic configuration of the termination box 11 shown in FIG. 8 includes a case for housing each component, a surge current induction circuit 60, an outlet 19 as a power supply circuit, piping for drawing the optical communication cable 10 and the power line 17, and individual components. And a termination portion 70 through which the trunk cable 6 is routed.
As the surge current induction circuit 60, for example, a “molybdenum lightning arrester” described in Japanese Patent Publication No. 7-118361 or the “surge current avoidance element” as described above can be applied. That is, when a high-voltage surge current is to flow through a circuit to be protected, the device side and the ground side are connected via an inductive element that greatly opens the circuit at a much faster speed than the device side. That is, as shown in FIG. 9, it has an earth side terminal 62 connected to the earth wire 23 and an induction side terminal 63 that connects a circuit from the outlet 19, and these are connected via the induction element 61. . The inductive element 61 is kept insulated while a normal voltage current flows, and once the high voltage is applied, the insulation is broken and the resistance becomes low at once.
[0029]
Furthermore, it is desirable to apply one in which the conduction direction indicated by the “surge current avoidance element” is one direction. As a conduction direction, by conducting only from the induction side terminal 63 to the ground side terminal 62, even if a surge current is generated on the ground side, it is avoided that it flows to the device via the outlet 19. Therefore, when a surge current is induced in the optical communication cable 10, it flows to the messenger wire or the ground wire 23 that is taken out from the outdoors, and when it is induced to the power line 17, it flows to the surge current induction circuit 60. Also, in the event that a surge current is induced in the ground wire 23, by laying the same wiring as described above in adjacent stations connected by the optical communication cable 10, etc. It flows through the optical communication cable 10 to the ground wire of the adjacent station. That is, regardless of the direction in which the surge current is induced, it is possible to protect the termination box and all the devices connected thereto.
[0030]
As shown in FIG. 10, the tension member 15, the messenger wire 15a or the shield ground 15b of the optical communication cable 10 includes an insertion tube 25 whose tip can be inserted, and a washer portion 26 formed integrally therewith. The crimp terminal 27 is attached. In mounting, the tip of the messenger wire 15a or the shield ground 15b is inserted into the insertion tube 25, crimped around the periphery, and further covered with a rubber tube 28 which is an insulator. As a result, the tension member 15 and the crimp terminal 26 are joined, and the washer portion 25 is fixed to the ground side terminal 62 of the surge current induction circuit 60 with screws. Therefore, since the tip is not exposed, and is covered with an insulator, the induced lightning induced to the messenger wire 15a or the shield ground 15b flows to the ground side without causing ignition or the like.
As for securing the grounding means, an individual grounding wire may be provided as shown in FIGS. 8 and 9, but one phase of a single-phase alternating current can be used as the grounding. That is, one phase grounded externally is connected to the ground side terminal of the surge current induction circuit, and the other two phases are connected to an outlet. This eliminates the need for further ground wire construction.
[0031]
Next, the termination portion 7 will be described. As shown in FIG. 8, the termination portion 70 is provided with a guide ring 71 that guides a bundle of trunk cables 6, a stopper 72 that holds a part of each trunk cable 6 or a fusion point, and a large number of them around the periphery. The trunk cable 6 is fused to the optical cable with connector 10 a and connected to the connector 74. A bundle of trunk cables 6 led out from the optical communication cable 10 is guided to the guide ring 71 so as not to be bent at an acute angle, and is branched into individual trunk cables 6. In order to take a length with a margin (hereinafter referred to as a surplus length), each of the trunk cables 6 needs to process the surplus length of the trunk cable 6 when the individual trunk cable 6 is fused to the optical cable with connector 10a. is there. The extra length portion of the main cable 6 fused with the optical cable with connector 10 a is wound around the guide guide 73 so as not to form an acute angle, and the length is adjusted, so that the fusion point (not shown) fits in the stopper 72. To. The connector-attached optical cable 10a coming out of the stopper 72 is further guided by the guide guide 73 and connected to the connector 74 as close to a straight line as possible.
[0032]
As described above, in this embodiment, the termination box 11 and the hub box 12 are disposed on the side of the work desk 2. Accordingly, when wiring the optical communication cable 10 or during maintenance and inspection, the operator can open the doors 13 and 14 of the storage box 9 and simply perform the work as it is. Remarkably improved. In addition, since the termination box 11 and the hub box 12 are stored in an orderly manner in the storage box 9, it is possible to reduce the size and weight of the storage structure.
[0033]
Further, since the commercial power supply cable 17 is incorporated into the termination box 11, a distribution board is substantially unnecessary, and space saving in the server room 1 is promoted accordingly. The termination box 11 and the hub box 12 are arranged on the side of the work desk 2 away from the air conditioner. Therefore, since the side of the work desk 2 is less affected by the convection by the air conditioner and less dust than the upper part of the wall surface, there is no possibility that the dust will enter and adhere to the termination box 11 and the hub box 12 as in the prior art. .
[0034]
In addition, this invention is not limited to the said Example, A various application deformation | transformation is possible. For example, in the above embodiment, the storage box 9 is divided into two left and right chambers, and the termination box 11 and the hub box 12 are stored in each chamber. For example, as shown in FIG. It is also possible to divide the terminal box 11 and the hub box 12 into each chamber.
[0035]
A storage box 9 shown in FIG. 11 is a distribution board type storage box, in which a main breaker 40, a branch circuit, a lightning arrester, a termination box 11, and a hub box 12 are housed together. The storage box 9 is provided with a surge counter 39 so that lightning surge current can be counted.
[0036]
FIGS. 12 and 13 are diagrams schematically showing a construction example of the termination box of the present invention. The optical communication cable 10 (UTP) is connected to the precision equipment 42 such as the client personal computer 4, the server 7 and the printer, which are arranged on each floor of the building. An example in which the storage boxes 9 wired with cables are connected together and an example in which the storage boxes 9 installed in each building are connected between a plurality of buildings are shown. By connecting and looping a plurality of storage boxes 9 in this way, an equivalent circuit is formed, and it can be grounded to the earth regardless of where the induced lightning arrives.
[0037]
【The invention's effect】
As described above, the present invention has the following excellent effects.
(1) A termination box and a hub box are stored in one section of a storage box that is divided into two sections, and a precision box and a hub are stored in the other section. Wiring work and maintenance work of the communication cable can be easily performed, and work efficiency can be remarkably improved.
(2) Since the termination box and the hub box are integrally stored, the storage structure can be made smaller and more compact, and the storage space can be greatly reduced.
(3) The tension member or messenger wire is firmly fixed in the termination box, connected to the ground wire, and its tip is not exposed, so there is no risk of ignition due to induced lightning, and the end of the optical communication cable It can be held securely.
(4) Even if an induced lightning arrives from the tension member or messenger wire and the power line, the surge box is adequately protected so that the termination box and connected equipment are not damaged.
(5) Since each trunk cable is held with an appropriate extra length, it can be properly wired to prevent accidents such as tearing.
(6) By looping a plurality of termination boxes, an equivalent circuit is formed, and it is possible to ground to the ground regardless of where the induced lightning comes.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram illustrating a termination box and hub box storage device according to the present invention.
2 is a main part configuration diagram illustrating the storage case of FIG. 1; FIG.
FIG. 3 is a plan view showing a server room according to the present invention.
FIG. 4 is a wiring diagram in a termination box and a hub box according to the present invention.
FIG. 5 is a schematic diagram showing a basic form of an avoidance element.
6A is a perspective view and FIG. 6B is a side view showing another embodiment of the avoidance element.
FIG. 7 is a circuit diagram of an avoidance circuit.
FIG. 8 is a schematic view showing another embodiment of the termination box.
FIG. 9 is a circuit diagram showing a surge current induction circuit and a wiring example corresponding thereto.
FIG. 10 is an enlarged side sectional view showing a tip portion of a tension member.
FIG. 11 is a perspective view showing another embodiment of the storage box.
FIG. 12 is a schematic diagram for explaining a state in which a plurality of termination boxes according to the present invention are installed in a building.
FIG. 13 is a schematic diagram for explaining a state in which the termination box of the present invention is installed in a plurality of buildings.
[Explanation of symbols]
1 Server room
2 Work desk
3 Rubber mat
4 Client PC
5 Hub
6 Optical fiber (trunk cable)
7 Server PC
8 Stopper
9 Storage box
10 Optical communication cable
11 termination box
12 Hub box
13 Opening door
14 Opening door
15 Tension member
15a messenger wire
15b shield earth
16 Wiring board
17 Power cable
18 Workstation
19 Outlet
20 conductor
21 Lightning Arrester
22 Lightning Arrester
23 Ground wire
24 Ground wire
25 Intubation tube
26 Washer
27 Crimp terminal
28 Rubber tube
29 Printer
30 circuit elements
31 Surge current reaction part
32 Surge current response terminal
32a surge current response terminal
Terminal of 32D surge current reaction part
33 Surge current reaction part
34 Surge current response terminal
34a Surge current response terminal
35 Surge current reaction part
36 Surge current response terminal
Terminal of 36a surge current reaction part
37 Ground wire
38 Ground wire
39 Surge Counter
40 Main Breaker
41 breaker
42 Equipment
43 Wiring between breaker and equipment
44 circuit lines
45 circuit lines
50 Avoider
51 Avoidance element
52 Avoidance element
53 First ground wire
54 Bypass line
55 Semiconductor device
60 Surge current induction circuit
61 Inductive element
62 Ground side terminal
63 Lead terminal
70 termination
71 induction ring
72 Stopper
73 Guide Guide
74 connector
80 Building
81 Building
82 Building
83 Building

Claims (4)

The optical communication cable termination box is stored in at least two sections, and the optical communication cable termination box is stored in one of the sections, and is supplied from the power line laid with the optical communication cable in the termination box of the optical communication cable. that the power storage of the optical communication cable termination box hub is housed in a device for bundling the optical fiber from the distribution board and a plurality of have a port optical communication cable which is the terminated connected to each port to distribute a box, the storage box is of an optical communication cable termination box, characterized in that attached to the outer portion of the desk storage box. A crimp terminal of an optical communication cable electrically connected to the grounding means is composed of an insertion tube and a washer connected to the end of the insertion tube, and the end of the tension member for pulling the optical communication cable or the end of the messenger wire is inserted through the insertion tube. 2. The crimping terminal and the end portion are electrically connected to each other by being inserted into a tube and caulking the insertion tube, and the bonded portion is covered with an insulating material. Storage box for optical communication cable termination box as described.   A power line is installed in the storage box of the optical communication cable termination box together with the optical communication cable, an electric device is provided, and electric power is supplied to the electric device through the power line, and is connected to a grounding means. A surge current induction circuit having a side terminal and an induction side terminal electrically connected to the ground side terminal. The surge current induction circuit maintains insulation while a normal voltage current flows, and temporarily When voltage is applied, insulation is broken and the resistance becomes low, and the induction side terminal of the surge current induction circuit is connected to a location in the middle of the electrical wiring connecting the power line and the electrical equipment, and the tension member for pulling the optical communication cable Alternatively, the crimp terminal joined to the end of the messenger wire is connected to the ground side terminal of the surge current induction circuit. Optical communication cable termination box storage box as claimed in. Means for fixing the end of the tension member for pulling the optical communication cable, a stopper for holding a part of the individual trunk cable or the fusion point with the connector cable, and a plurality of windings capable of freely winding the individual trunk cable optical communication cable termination box storage box according to any one of claims 1 to 3, characterized in that erected induction guide posts.

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