JPS60169810A - Optical cable connection can - Google Patents

Abstract

PURPOSE:To easily vary the length of an optical cord for wiring and to easily judge whether a fault occurs at an optical cable side or a wiring optical code side by providing a cord wiring excessive-length containing tool and a detachable connector connection part. CONSTITUTION:The cord wiring excessive-length containing tool 35 contains the wiring excessive-length part of the optical cord for wiring. The containing tool 45 is made of rubber in a cross shape. Looped cord gripping parts 45A are provided to respective tips and loop disconnection parts 45B for putting the optical cord for wiring therein are also provided. The connector connection part 41 is provided on a substrate 1 and consists of a connector stand 42, connector fitting plate 43, and adapter 44. If a fault occurs, connectors are detached, and consequently it is judged whether the fault occurs to the optical fiber side or at the wiring optical cord side. Thus, the judgement is made and the connectors are reconnected easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an optical connection box for connecting an optical cable and an optical wiring cord.

(Prior art) This type of optical cable connection surface is installed indoors near the outer wall of a building, and the optical cable and the optical cable for wiring are drawn into the rainwater body. The coated optical fiber is permanently connected by fusion splicing, etc., and the remaining splicing length of the coated optical fiber is stored in the splicing surplus storage section in consideration of re-splicing, etc. .

When a failure occurs in such an optical cable connection, it is necessary to determine whether the failure is on the optical cable side or on the wiring optical board side. Optical cable managers are often unable to go to the end of the optical cable for indoor wiring and determine the location of the failure at the installed equipment due to company secret regulations. Generally, decisions have to be made on the connection side. In this case, conventionally, the permanently connected coated optical fiber is once cut, and the cut point is used to determine whether the failure is on the optical cable side or on the optical wiring cord side.

However, this method of judgment has the disadvantage that the coated optical fiber is cut, and therefore, the permanent connection work, which requires careful attention, must be performed again after the judgment is completed.

Additionally, the length of optical fiber cords for wiring within buildings usually differs from site to site, and for this reason, conventionally, the length of optical fiber cords for wiring has been cut to suit the site. It had the disadvantage of poor workability.

Furthermore, if it becomes necessary to change the location of equipment within the building at a later date, the optical wiring cord must be cut or replaced with an optical wiring cord of the required length depending on the location. However, it had the disadvantage of poor workability.

(Objective of the Invention) The object of the present invention is to be able to easily determine whether the failure is on the optical cable side or the optical wiring cord side, and to easily deal with changes in the length of the optical wiring cord. Provides a connection surface for optical cables that can be connected.

(Structure of the Invention) The present invention is characterized in that an optical cable and an optical cord for wiring are drawn into a mountainous area, and a coated optical fiber of the optical cable and a coated optical fiber of the optical cord for wiring are connected at a permanent connection part within the mountainous body. At the optical cable connection surface where the extra connection length of the coated optical fiber is stored in the extra connection length storage section, the optical cable for wiring inside the mountain body has a connector connection part that can be attached and detached in the middle thereof. The present invention is characterized in that a cord wiring surplus length accumulating device is installed in the mountain body and stores the wiring surplus length of the wiring optical cord.

In this way, if a removable connector connection part is provided in the middle of the optical fiber cable for white wood wiring, in the event of a failure, by removing this connector connection part, it is possible to determine whether the failure is on the optical cable side or not. It can be easily determined whether there is a failure on the optical cord side. Once the determination is complete, the connectors can be reconnected, making the connection work easier.

Since the connector connection is performed at the wiring optical cord having a protective coating, it is possible to prevent damage to the optical fiber when the connector is attached or detached.

Moreover, the optical cord for wiring left over from the wiring can be stored in the cord wiring surplus length storage device without being cut. Furthermore,
If the length of the optical wiring cord changes later due to rearranging the equipment, etc., cut the optical wiring cord or
The installation length can be adjusted by adjusting the accumulated length of the wiring optical cords stored in the cord wiring surplus length storage tool without replacing them.

(Example) Examples of the present invention will be described in detail below with reference to FIGS. 1 to 5. As shown in the figure, the optical cable connection surface of this embodiment is made up of a plain wooden board 3 consisting of a rectangular flat board 1 standing upright, and a cover 2 in the shape of a picture covering the periphery and front surface of the board 1. has. The cover 2 consists of side plates 2A, 2B, 2C, and 2D that surround the periphery of the board 1, and a front plate 2F that closes off the front side. Possibly fixed.

A pair of cable entry ports 6.degree. 7 are formed by cuts from the opening edge of the cover 2 on both sides of a part of one corner of the plain wood body 3 formed by the side plates 2A and 2D. The board 1 of the white wooden body 3 corresponds to the cable entry port 6 on one side.
A retaining unit 8 is attached to the. This retaining unit 8 has a structure in which a cable sheath retaining part 10 is attached to one end of the base 9 and a cable tension member retaining part 11 is connected to the other end. Attach board 1 with a pair of screws 12.
By attaching it to the holder, it is possible to remove both retaining parts 10° and 11 at once.

To attach these screws 12, holes (not shown) are provided in portions of the substrate 1 corresponding to the screws 12. The cable sheath retaining part 10 is attached to a pair of stand members 10A raised from the base 9, a pair of clamping members 10B placed astride the bent portions of the upper ends of these stand members 10A, and It consists of tightening screws 10C that fasten both ends of the holding member 10B to each stand member 10A. The cable tension member retaining portion 11 includes a stand member 11A raised from the base 9, a support member 11B formed by bending the stand portion 011A, and a support member 11B placed on the support member 11B. It consists of a presser member 11C and a tightening screw 11D that tightens and fixes the presser member 11G to the support member 11B. A pair of mounting holes 13 for mounting the retaining unit 8 with screws 12 are provided in a portion of the base plate 1 corresponding to the other couple drawing lower. A rubber t14 provided with a bushing portion 14A is attached to the cable lead-in port 6 on the side where the retaining unit 1-8 is provided. The cable lead-in lower on which the retaining unit 8 is not provided is covered with a rubber lid 15.

Adjacent to the retaining unit 8, on the base plate 1 of the plain wooden body 3, a connecting extra length storage device 16 is removed. This connection extra length storage device 16 consists of an ω rear arm 17, a flexible storage board 19 made of rubber that is suspended from the hanging arm 17 by a hanger 18, and a storage board 19 that is placed at a predetermined distance above one storage board. /C A pair of flexible bobbins 2OA in the shape of a thin disk.

20B and these bobbins IA, 20B, hanger 18
A connecting portion holder 21 is provided at a closer portion in a tangential direction to both bobbins 2OA and 20B. Both bobbins 20Δ, 20B are provided with cross-shaped grooves 22 to increase flexibility. Using this groove 22, both bobbins 2OA.

A fiber holding clip 23 is attached to the outer periphery of 20B. On the back side of the storage board 19, a transparent and flexible sheet-like cover 24 such as a plastic sheet is provided.
Both bobbins 2OA and 20B are provided so as to project slightly above and in the left-right direction, and to extend significantly downward.

This cover 24 has a central folded part 24A that is folded back to the lower part between both bobbins 2OA and 20B, and
Left and right folded parts 2 that are folded back onto the lower upper surface of 0A and 20B
4B, 24G, and the center folded part 2 which is exposed from F of the connection part holder 21 and passes between both bobbins 2OA and 20B.
A presser band portion 24D extending over 4A is provided,
The presser band portion 24D is attached to the center folded portion 24 with the hook 25.
It is designed to be detachably fixed to A. On the board 1, a pair of stands 26 each having an opening-shaped cross section are erected horizontally in order to suspend and support the extra connection length storage device 16, and rubber arms are fitted into these stands 26. A support 27 is fitted.

Although not shown, a plurality of arm fitting grooves are formed on the upper surface of these arm fitting supports 27 at regular intervals in the longitudinal direction, and each arm 1 of the plurality of connection extra length storage devices 16 is provided with a plurality of arm fitting grooves.
7 is fitted in and is suspended and supported.

On the substrate 1 on the side of one bobbin 2OA, there is a side plate 2 for supporting the coated optical fiber guided to the bobbin 2OA side.
A fiber stand 28 having an opening-shaped cross section is erected horizontally along the line D, and a fiber fitting support 29 made of rubber is fitted into this fiber stand 28 . Although not shown, fiber fitting grooves are formed in the fiber fitting support 29 at regular intervals in the longitudinal direction thereof.

On the substrate 1 on the side of the other bobbin 20B, there is a side plate 2C for supporting the wiring optical cord leading to this bobbin 20B.
A cord stand 30 having an opening-shaped cross section is erected horizontally along the cord stand 30, and a cord fitting support 31 made of rubber is fitted into the cord stand 30. Although not shown, cord fitting grooves are formed in the cord fitting support 31 at regular intervals in the longitudinal direction thereof.

1 on both sides of a part of the corner formed by the side plates 2A and 2B.
A pair of cord entry openings 32, 33 are formed by cuts from the opening edge of the cover 2. Corresponding to one cord lead-in port 32, a cord pull fastener 34 is horizontally erected on the board 1. The cord tensioner 34 includes a tensioner stand 35 erected on the board 1 along the cord entry port 32, and a tensioner fitted into slits 36 cut into the stand 35 at predetermined intervals in the longitudinal direction. It consists of a bushing 37. The retaining stand 35 is removably fixed to the board 1 with screws 38. In order to remove this screw 38, a hole corresponding to the screw 38 is formed on the board 1 (not shown).
It is opened in Attach the retaining stand 35 to the part of the board 1 corresponding to the other cord entry port 33 with the screw 3.
A pair of holes 39 are provided for mounting 8C. This cord entry port 33 is made of rubber M2O
is blocked by.

A connector boulder 41 is erected on a portion of the board 1 between the cord pulling fastener 34 and the cord stand 30. This connector holder 41 includes a connector stand 42 horizontally erected on the board 1, and a connector receptacle (not shown) stacked and supported along the connector stand 42.
It consists of a plug plate 43 and a pair of adapters 44 provided on each connector removal plate 43.

A cord wiring surplus length accumulating device 45 is provided on the board 1 adjacent to the cord pulling fastener 34.

This cord wiring surplus length storage device 45 is made of rubber and has a cross shape, and has a loop-shaped grip portion 45 at each end.
△ is provided respectively, and each of these]-do grips 45A is provided with a loop cut-off portion 45B into which an optical wiring cord is inserted, and a hanging magic trick 45G is folded at the tip of one of them. The songs can be freely linked together. A hanging stand 46 is erected on the board 1 to suspend, support and cover the cord wiring surplus length storage device 45. This suspension stand 46 is provided with notches (not shown) at regular intervals in its longitudinal direction, and by inserting the 11 magic tricks 45G into each of the notches, a plurality of cord wiring surplus length accumulators 45 are suspended and supported. It has become so.

In such an optical cable connection surface, for example, as shown in FIG. 6, an optical cable 47 is drawn in from the cable entry port 6, and the tip of the cable sheath 48 is held in place by the latchable sheath holding part 10 in the holding unit 8, and the cable tension is applied. The cable tension member 49 is retained by the member retaining portion 11. The coated optical fiber 50 exposed together with the tension member 49 from the tip of the optical cable 47 is supported in the middle by the fiber fitting support 29 and guided to the connection extra length storage device 16 side. Further, the wiring light cord 51 drawn in from the cord lead-in port 32 is held back by the retaining bushing 37 at the entrance portion, and its surplus length is wound up by the cord wiring surplus length storage device 45, and the cord wiring The portion that exits the extra length accumulator 45 is once separated and connected to connectors 52 and 53.
The cables are connected removably at the cord-fitting support 31, and the portion beyond that is supported by the cord fitting support 31 and led to the extra connection length storage 16 side. A coated optical fiber 54 is exposed from the tip of the wiring light cable 51 at a position near the extra connection length storage device 16, and is connected to the coated optical fiber 50 on the optical cable 47 side by a permanent fiber connection part 55, and both Coating A (the extra length of the connection made by the optical fibers 50 and 54 is on both bobbins 2OA,
The fiber is wound up and stored around the outer periphery of the fiber 20B, and the permanent fiber connection portion 55 is supported by the connection portion boulder 21.

In such an optical cable connection surface, leave extra wiring length in the optical cable 51 for wiring in advance, and after wiring to the external device is finished, store the extra wiring length in the cord wiring extra length storage tool 45.
The loop separation part 45B is opened and wound around the outer periphery of the loop and accumulated. Therefore, there is no need to cut the excess wiring length. Furthermore, if it becomes necessary to rearrange external equipment, etc. at a later date, the length of the optical wiring cord 51 can be adjusted using the portion stored in the extra wiring length storage tool 45. can. Therefore, there is no need to cut the optical wiring cord 51 or replace it with a long optical wiring cord 51, and the work can be carried out efficiently.

If a failure occurs later during use, the connector 52
and 53, and determine whether the failure is on the optical cable 47 side or the wiring optical cord 51 side from the disconnected portion side of these connectors 52 and 53. When the determination is completed, the connectors 52 and 53 are reconnected. This reconnection work is very easy since the connectors 52 and 53 are connected.

Note that the cord wiring surplus length storage device 45 and C are not limited to those in the first embodiment, but may be of a type that uses a disk-shaped bobbin, or a basket type that takes out coils, etc. But that's fine.

(Object of the Invention) As explained above, in the optical cable connection surface according to the present invention, there is a
2 possible connector connections are provided, so in the event of a failure, this connector connection can be removed externally.
It is possible to easily determine whether the failure is on the optical cable side or the wiring optical cord side. Once the determination is complete, the connectors can be reconnected, making the connection work easier. Since the connector is connected at the wiring optical cord having a protective coating, it is possible to prevent damage to the optical fiber when the connector is attached or detached. Further, since work on several connectors can be done in advance at the factory, it is possible to prevent an increase in on-site work even if the number of connectors increases.

Furthermore, in the present invention, since a cord wiring surplus length storage device is installed to accumulate the wiring surplus length of the wiring optical cord in the rainwater body, the cord wiring can be done without cutting the wiring surplus optical cord. The excess length can be stored in the storage device,
Wiring workability can be improved. Further, according to the present invention, it is possible to arrange optical wiring cords at a later date when rearranging equipment, etc. Even when the length changes, you can adjust the accumulated length of the optical wiring cord stored in the cord wiring surplus length storage device without cutting or replacing the optical wiring cord in use. The length can be adjusted.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the optical cable connection surface according to the present invention in a state before the cable is assembled, with the cover cut away, Fig. 2 is a left side view of Fig. 1, and Fig. 3 is the same as Fig. 1. 4 is a bottom view of FIG. 1, FIG. 5 is a perspective view of the retaining unit used in this embodiment, and FIG. 6 is a diagram of the optical cable connection box according to the present invention after the cable is assembled. It is a front view of a state where a cover is broken showing an example of a state. 3... Shiraki body, 8... Holding unit, 16...
・Connection extra length storage device, 2OA, 20B...Bobbin, 45
...Cord wiring surplus length storage device, 47...Optical cable,
50...Coated optical fiber, 51... Optical cord for wiring, 52.53... Connector, 54... Coated optical fiber, 55... Fiber permanent connection part. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Continued from page 10 Inventor: Kazuo Hashimoto Meuchi, Chiyoda-ku, Tokyo Inventor: Yuji Sato Chiyoda-ku, Tokyo 1-2-6-1 Furukawa Electric Co., Ltd. 1-1-6 Saiwai-cho Nippon Telegraph and Telephone Public Corporation Procedures Manual (Voluntary) March 22, 1980 Commissioner of the Japan Patent Office Aihiro Wakasugi 1. Indication of the case: Japanese Patent Application No. 59-24275 2. Name of the invention: Optical cable connection box 3. Relationship with the supplementary IF case: Patent applicant (529) Furukawa Electric Co., Ltd. (1 other person) 4. New t agent, Minato-ku, Tokyo! 4-31-6 Expenditure Bill 6R1i Mei III Book 6, Supplementary IF document printed in the size specified by the content regulations (no changes in content) is attached as a supplement.

Claims (1)

[Claims] An optical cable and a wiring optical cord are drawn into the rainwater body, and within the rainwater body, the coated optical fiber of the optical cable and the coated optical fiber of the wiring light cord are connected at a permanent connection part, and the coated optical cord is connected to the coated optical fiber of the wiring light cord in the rainwater body. ``On the optical cable connection surface where the extra connection length of the optical fiber is stored in the extra connection length storage part, the optical cable for wiring in the rainwater body is provided with a removable connector connection part in the middle thereof, The optical cable connection surface is characterized in that a cord wiring surplus storage device is provided in the rainwater body to store the wiring surplus portion of the wiring optical cord.