JP2005164755A - Simple connection type adapter and cable wiring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple connection type adapter which is miniaturized in the shape of a juncture, permits the connection of distribution cables at a narrow part, and can be easily served for a home network for which a lower cost is demanded, and a cable wiring method. <P>SOLUTION: The simple connection type adapter includes a split sleeve 1 which butts the end surfaces of ferrules respectively connected to both distribution cables against each other and aligns the cores of both the distribution cable put on the butted ferrule portions in connecting the one distribution cable to the other distribution cable and a rubber tube 2 which is disposed to cover the split sleeve 1 and fixes the ferrules of both the distribution cables. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a simple connection type adapter and a cable wiring method used when connecting a wiring cable such as an optical fiber laid in a building such as a detached house or a building.

  Conventionally, when connecting a distribution cable such as an optical fiber installed in a building such as a detached house or a building, an F04 type single-core optical fiber connector “SC” attached to one end of each distribution cable is used. A connector such as a “single fiber coupling” type optical connector is mechanically connected via an optical adapter. The conventional optical adapter mainly protects the connecting portion of the optical connector and the sleeve that aligns the core (central axis) of the optical fiber inserted in the ferrule attached to the optical connector, etc. It is composed of a housing (housing) that allows repeated insertion and removal of the connector (detachment of the connector).

  When connecting wiring cables such as installed optical fibers in buildings such as detached houses and buildings, wiring methods using conventional optical adapters are possible in places where sufficient space is secured. However, it has been difficult to use in an outlet switch box (conforming to Japanese Industrial Standard (JIS) C8305, shape 56 × 102 × 35 mm), narrow space such as in a room-to-room pipeline. In preparation for wiring failures after operation (cable disconnection, loss, return loss over standard values, etc.), it is necessary to secure the extra length of the wiring cable in the vicinity of the connection, and the extra length storage space (for example, optical fiber For the wiring design considering the allowable bending radius of 30 mm or more), since the shape of the optical adapter is relatively large, it is a complicated task to implement it in a narrow place such as a switch box in an outlet or a pipe between rooms. It was.

  In addition, the mechanism of the connector housing such as the conventional F04 type single-core optical fiber connector “SC type optical connector” attached to the tip of the optical adapter and the wiring cable can be repeatedly inserted and removed, resulting in a complicated mechanism (damaging the appearance). In addition, it is difficult to provide a home network that is expensive and requires low cost.

There is Non-Patent Document 1 as a conventional SC type optical connector technology.
Edited by Nippon Telegraph and Telephone Corporation's Research and Development Promotion Department "NTT Technical Journal Vol. 9 No. 7" Published by The Telecommunications Association July 1, 1997 p. 19-23

  The present invention has been made in view of the above circumstances, and when connecting a wiring cable laid in a building such as a detached house or building, the shape of the connecting portion is reduced, and the switch box in the outlet, the room Simple connection type adapter and cable wiring method capable of connecting a wiring cable in a narrow space such as an intermediate pipe line, which is easy for a user to use for a home network that is required to be inexpensive, and a cable wiring method The purpose is to provide.

  In order to achieve the above object, the simple connection type adapter of the present invention, when connecting one wiring cable to the other wiring cable, abuts the end surfaces of the ferrules respectively connected to both of the wiring cables, and the ferrule portion that is abutted. A split sleeve that aligns the cores of both of the wiring cables and a cylindrical member that is provided so as to cover the split sleeve and is made of an elastic body that fixes the ferrule of both the wiring cables. It is.

  Further, the present invention is characterized in that, in the simple connection type adapter, a cylindrical member made of a split sleeve and an elastic body is configured so that repeated insertion / extraction at the connection portion of both wiring cables is possible.

Further, according to the present invention, in the simple connection type adapter, the cores of both the wiring cables are aligned with the split sleeve so as not to affect the transmission characteristics such as loss and return loss at the connection points of both the wiring cables. In addition, a contraction force is applied by a cylindrical member made of an elastic body so that the ferrule end face of the connection point is pressed.
Further, according to the present invention, in the simple connection type adapter, as a wiring cable, a wiring cable for one or more of SMF (single mode optical fiber), MMF (multimode optical fiber), POF (plastic optical fiber) or metallic cable is used. It is characterized by using.

  The cable wiring method of the present invention is characterized in that a wiring cable is wired in a building using the simple connection adapter.

  The simple connection type adapter and the cable wiring method of the present invention are used for wiring between rooms in buildings such as detached houses and buildings, and at the connection portion of the wiring cable, not only the conventional optical adapter but also the tip of the wiring cable. The shape of the connector such as the F04 type single fiber optic connector “SC type optical connector” attached to the connector can be simplified. For this reason, it is possible to connect a wiring cable in a narrow place such as a switch box in an outlet or a pipeline between rooms, and it is easy for a user or the like to use it for a home network that is required to be inexpensive.

Embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 shows a simple connection type adapter according to an embodiment of the present invention, wherein (a) is a split sleeve constituting the simple connection type adapter, (b) is a simple connection type adapter, and (c) is a simple connection type adapter. This is a usage example. In the figure, 1 is a split sleeve, 2 is a rubber tube as an example of a cylindrical member made of an elastic body, and 3 is an SC type optical connector.

  As shown in FIG. 1 (a), the split sleeve 1 is formed in a cylindrical shape by, for example, phosphor bronze, zirconia ceramic or the like, and one slit (split) is provided in the axial direction on the cylindrical side wall.

  As shown in FIG. 1B, a cylindrical rubber tube 2 is covered around the split sleeve 1.

  As shown in FIG. 1C, one SC-type optical connector 3 is connected to the other SC-type optical connector 3 with a simple connection type adapter shown in FIG. That is, in the SC type optical connector 3, an optical fiber as an example of a wiring cable connected to the rear end of the plug is fixed to the center of a cylindrical rod-shaped ferrule, and the tip of the ferrule is provided so as to protrude from the tip of the plug. Accordingly, the tip of the ferrule protruding from the tip of the plug is inserted from both ends of the cylindrical rubber tube 2 and the split sleeve 1 and is abutted against each other to connect one optical fiber to the other optical fiber. In this case, the split sleeve 1 is placed on the ferrule portions that face each other to align the cores of both optical fibers, and the rubber tube 2 covers the split sleeve 1 to fix the ferrules of both optical fibers. .

  The split sleeve and the rubber tube (cylindrical member made of an elastic body) are configured so that repeated insertion and removal with a ferrule that is a connecting portion of both optical fibers (wiring cables) is possible.

  In addition, the split sleeves align the cores of both wiring cables and the ferrules at the connection points so as not to affect the transmission characteristics such as loss and return loss at the connection points of both optical fibers (wiring cables). A contraction force is applied by a rubber tube (cylindrical member made of an elastic body) so that the end faces are in pressure contact.

  As the wiring cable, SMF (single mode optical fiber), MMF (multimode optical fiber), POF (plastic optical fiber), or a metallic cable for one or a plurality of cables can be used.

  The simple connection adapter includes a split sleeve 1 built in the optical adapter and a rubber tube 2 covering the split sleeve 1. The rubber tube 2 is integrated with the split sleeve 1, and when connecting a wiring cable such as an optical fiber laid in a building such as a detached house or a building, an F04 type single unit attached to the tip of the wiring cable is used. A ferrule attached to the connector 3 such as a core optical fiber connector “SC type optical connector” is connected. Functionally, the split sleeve 1 aligns the core (center axis) of each wiring cable, and the shrinking force of the rubber tube 2 connects each wiring cable to a PC (Physical Contact) to fix the ferrule ( Repeated insertion / extraction is possible). At the tip of the wiring cable, connector 3 such as F04 type single-fiber optical fiber connector “SC type optical connector” is described, but the structure of the optical connector is simplified (the housing is removed and the shape of only the ferrule) But it is possible. Since the split sleeve 1 having the function of aligning the core of the wiring cable is responsible for the connection by the simple connection type adapter, it affects the transmission characteristics (loss, return loss, etc.) of the wiring cable at the connection part. Absent.

  FIG. 2 is an exploded perspective view showing a cable wiring method of a simple connection type adapter according to an embodiment of the present invention, and FIGS. 3A and 3B are also external perspective views. That is, the trunk cable 12 is introduced into the switch box 8 through the pipe 11 provided on the side surface of the bottomed cylindrical switch box 8, and the ferrule 9 is attached to the tip of the trunk cable 12. A mounting portion 13 is provided on the inner surface of the switch box 8. The ferrule 9 is inserted and connected to one end of a simple connection type adapter 14 as shown in FIG. A face plate 4 is attached to the opening of the switch box 8 with a switch box attachment frame 6 and a face plate attachment frame 5 interposed therebetween. In this case, the rubber tube storage part 7, the ferrule 9 and the trunk cable 12 are stored in the switch box 8, but a part of the rubber tube storage part 7 is exposed to the outside through the window of the face plate 4, and is simply connected. The other end of the adapter 14 is exposed to the outer surface. Reference numeral 10 denotes a wiring cable connected to the connector on the user terminal side.

As shown in FIG. 3A, a part of the rubber tube storage portion 7 is exposed to the outside on the face plate 4 of the switch box 8. As shown in FIG. 3B, the connector of the wiring cable 10 is inserted and connected to the rubber tube housing portion 7 exposed to the outside.
In this case, the ferrule protruding from the connector of the wiring cable 10 and connected to the wiring cable 10 is inserted and connected to the other end of the simple connection type adapter 14 stored in the rubber tube storage unit 7.

  FIG. 2 and FIG. 3 show an example used in a narrow space such as a switch box in an outlet. Face plate 4, face plate mounting frame 5, switch box mounting frame 6, rubber tube storage section 7 (equipped with simple connection adapter 14), switch box 8 are combined in order, and an outlet for terminating trunk cable 12 of the wiring cable ( Configure an optical outlet. Therefore, the ferrule 9 attached to the tip of the main cable 12 is connected to the wiring cable 10 on the user terminal side via the simple connection adapter 14. However, although the surplus length processing portion of the trunk cable 12 is not illustrated, a large space is required in the switch box 8.

  As described above, according to the simple connection type adapter, when connecting a wiring cable laid in a building such as a detached house or building, the shape of the connecting portion is reduced, and the switch box in the outlet, the room Wiring cables can be connected in confined areas such as between pipes. In addition, the housings (housings) for both the adapter and the optical connector, which are complex mechanisms, are not required, and the price is reduced, so that the adapter can be easily used for a home network.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiment examples may be appropriately combined.

The simple connection type adapter which concerns on the example of embodiment of this invention is shown, (a) is a split sleeve which comprises a simple connection type adapter, (b) is a simple connection type adapter, (c) is a usage example of a simple connection type adapter. is there. It is a disassembled perspective view which shows the cable wiring method of the easy connection type adapter which concerns on the example of embodiment of this invention. (A), (b) is an external appearance perspective view which shows the cable wiring method of the simple connection type adapter which concerns on the example of embodiment of this invention.

Explanation of symbols

1 Split sleeve 2 Rubber tube 3 as an example of a cylindrical member made of an elastic body 3 SC type optical connector

Claims (5)

When connecting one distribution cable to the other distribution cable, the end face of the ferrule connected to each of the two distribution cables is abutted, and the split sleeve that covers the ferrule portion that is abutted and aligns the cores of both the distribution cables;
A simple connection type adapter comprising: a cylindrical member made of an elastic body provided so as to cover the split sleeve and fixing a ferrule of both wiring cables.   2. The simple connection type adapter according to claim 1, wherein a cylindrical member made of a split sleeve and an elastic body is configured so that repeated insertion and removal at a connection portion of both wiring cables is possible.   In order not to affect the transmission characteristics such as loss and return loss at the connection point of both wiring cables, align the core of both wiring cables with the split sleeve and press contact the ferrule end face of the connection point The simple connection adapter according to claim 1 or 2, wherein a contracting force is applied by a cylindrical member made of an elastic body.   A wiring cable for one or more of SMF (single mode optical fiber), MMF (multimode optical fiber), POF (plastic optical fiber) or metallic cable is used as the wiring cable. Or the simple connection type adapter of 3.   A cable wiring method, wherein a wiring cable is wired in a building using the simple connection type adapter according to any one of claims 1 to 4.

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