JP5415905B2 - Two-core optical outlet - Google Patents

Description

  The present invention relates to a two-core optical outlet that is mounted on a wall surface of a building, for example, or is installed in a distribution board.

  Generally, an optical cable led into a building or the like is provided with an extra length so that the cables can be easily connected to each other. After the connection, the extra length is wound in an optical outlet. It is stored in.

  However, since the length of the fiber core wire stored in the wound state is not necessarily constant, the fiber core wire is wound in contact with the winding portion, wound away from the winding portion without contact, or the fiber core wire itself is elastic. For this reason, various troubles were caused during storage, such as coming off from the overhanging part and jumping out from the winding part.

  In order to solve such a problem, there has conventionally been a technology that is an optical outlet that facilitates accommodation of a fiber core wire as disclosed in Patent Document 1, for example.

  That is, the optical outlet includes a box body, an optical fiber tray housed in a front opening of the box body, an inner cover that covers the optical fiber tray and covers the front surface of the box body, and the inner cover. And a decorative cover that covers the entire box body and the inner cover.

  In addition, a fixing part for fixing the optical fiber jack is provided on both sides of the lower end of the optical fiber tray, and the indoor cable of the optical fiber is bitten into this covering portion and bent in a U-shape in a side view at the center of the lower end of the box body. A holding member for receiving a gripping member formed with a U-shaped cut and a dustproof / airtight bushing is provided before and after being formed.

  Further, the optical fiber tray has a plurality of winding portions for winding the extra length of the fiber core wire in parallel in the vertical direction at a predetermined interval, and the optical fiber core wire of the indoor cable drawn into the box body from the outside, and the box body An optical fiber core wire connected to an optical fiber jack disposed inside is fusion-connected, and a holding portion that holds a reinforcing sleeve that protects the fused portion is provided.

JP 2006-235557 A

  However, in the case of the technique shown in Patent Document 1 described above, the optical outlet is composed of six independent members including a box body, an optical fiber tray, an inner cover, a decorative cover, a gripping member, and a bushing. It will be troublesome. In addition, since the number of parts is large, the production cost increases.

  Also, the gripping member formed in a U-shaped bend formed in the center of the lower end of the box body and bent in a U-shape before and after is bitten into one place of the covered portion of the indoor cable. Since the indoor cable is gripped, it cannot be said that the gripping function and the protection function for the optical cable are sufficient. For example, it is almost impossible to enter the optical cable with different diameters while securely gripping it without loosening.

  In addition, between the winding portion where the optical fiber core wire of the indoor cable drawn into the box body from the outside and the optical fiber core wire connected to the optical fiber jack arranged inside the box body are juxtaposed in the vertical direction. Because of the fusion splicing at the left and right symmetrical positions, the assembly becomes very troublesome. In addition, since the holding portion is provided in the optical fiber tray in order to hold the reinforcing sleeve that protects the fusion spliced portion, the structure becomes complicated and the manufacturing cost increases.

  In addition, when an optical outlet is installed in a switch box, for example, the optical cable cannot be connected from the back side of the optical outlet, so a sufficient response can be obtained depending on the selection and conditions of the optical outlet mounting position. Have the problem of not.

  Therefore, the present invention has been devised in view of the existing circumstances as described above, and can be installed by assembling with two parts of the optical outlet main body and the lid portion, so that the two-core optical outlet can be installed. It is possible to reduce the size and cost and improve the efficiency of installation work, improve the gripping and protection functions for the optical cable inserted in the optical outlet body, and select the installation position of the two-core optical outlet. -The aim is to provide a two-core optical outlet that can respond adequately according to conditions.

In order to solve the above-described problems, in the present invention,
A lid, and an optical outlet body that can be covered by the lid;
Incoming grooves formed respectively in the middle of the upper width direction of the optical outlet main body and in the middle of the lower width direction so as to allow the optical cable to enter,
An optical cable grip provided on the rear end side of the incoming groove in the incoming direction,
A winding storage portion provided in a substantially central portion of the optical outlet body so as to wind and store the extra length of the optical cable;
An optical connector adapter built in on both sides of the incoming groove on the top or bottom of the optical outlet body to connect the optical connector plug of the optical cable housed in the optical outlet body,
The inlet groove is a double-side inlet groove that allows each optical cable to be inserted and connected individually to the optical connector adapter by an optical connector plug,
A central insertion groove for inserting the two-core optical cable so that each of the branched core cables of the two-core optical cable is individually connected to the optical connector adapter by an optical connector plug;
The holding part of the optical cable is formed of a holding piece having elasticity, and is provided with a locking part on the optical cable holding surface side of the holding piece,
The central insertion groove is provided with a core wire branching portion into which both core wires of a two-core optical cable are branched and introduced on the rear end side in the direction of insertion of the central insertion groove, and the exposed both core wires are covered with a protective tube, It shall be gripped by the gripping part,
The bottom plate portion of the optical outlet main body is provided with an incoming opening for allowing an optical cable to enter from the back side of the optical outlet main body .

  According to the present invention, it is possible to reduce the size and cost of the two-core optical outlet and increase the efficiency of the installation work by making it possible to install by assembling the optical outlet body and the lid with two parts. In addition, the gripping function and the protection function for the optical cable inserted into the optical outlet main body can be improved, and further, sufficient response can be made according to the selection and conditions of the mounting position of the two-core optical outlet.

That is, a lid, and an optical outlet body that can be covered by the lid,
Incoming grooves formed respectively in the middle of the upper width direction of the optical outlet main body and in the middle of the lower width direction so as to allow the optical cable to enter,
An optical cable grip provided on the rear end side of the incoming groove in the incoming direction,
A winding storage portion provided in a substantially central portion of the optical outlet body so as to wind and store the extra length of the optical cable;
An optical connector adapter built in on both sides of the incoming groove on the top or bottom of the optical outlet body to connect the optical connector plug of the optical cable housed in the optical outlet body,
The incoming groove is a double-sided incoming groove that allows two optical cables to enter each, and is individually connected to the optical connector adapter by an optical connector plug,
Since it has a central inlet groove that connects each branched core wire of the two-core optical cable to the optical connector adapter individually by the optical connector plug ,
It can be easily installed by assembling the optical outlet main body and the lid part, and the optical outlet can be reduced in size and cost and the efficiency of the installation work can be sufficiently achieved. In addition, the degree of freedom of installation is improved so that two individual connections of two optical cables and branch connection of a two-core optical cable can be freely selected according to the installation conditions, thereby sufficiently improving the efficiency of the installation work. You can plan.

  The holding part of the optical cable is formed by an elastic pressing piece, and the holding part is provided on the optical cable holding surface side of the holding piece, so that optical cables of different diameters are securely held in a state where they are pressed firmly. It can be gripped.

The center inlet groove is provided with a core wire branching portion into which both core wires of a two-core optical cable are branched and introduced on the rear end side in the direction of insertion of the center inlet groove , and both the exposed core wires are covered with a protective tube, Since it is gripped by the gripping part, the branched core wire can be held together with the protective tube, and each core wire can be stored and gripped without loosening in a state where each core wire is firmly pressed.

  In the bottom plate of the optical outlet body, there are incoming openings that allow the optical cable to enter from the back side of the optical outlet body, so there are a total of three incoming lines on the top and bottom of the optical outlet body and the bottom plate part. Therefore, the most appropriate optical cable entry portion can be appropriately selected according to the state of the mounting position of the optical outlet body. That is, when the optical outlet main body is installed in, for example, a switch box or the like, the optical cable can be inserted from the back side of the optical outlet main body, and a sufficient response can be made according to the selection and conditions of the mounting position of the optical outlet.

It is a disassembled perspective view of the two-core optical outlet in one form for implementing this invention. Similarly, it shows an example of the configuration of the optical outlet body, (a) is a front view, (b) is a rear view. It is a disassembled perspective view of the two-core optical outlet similarly provided with the optical cable. An optical outlet body with two optical cables is shown, (a) is a front view when the optical outlet body is connected from above, (b) is a front view when the optical outlet body is inserted from below, ( c) is a front view when a line is inserted from the back side of the optical outlet body. 1 shows an optical outlet main body with one twin-core optical cable branched, (a) is a front view when entering from the upper side of the optical outlet main body, and (b) is a front view when entering from the lower side of the optical outlet main body. FIG. The example of a structure of the incoming groove of an optical outlet main body is shown, (a) is the front view which expanded the holding part of the upper incoming groove, (a) is the front view which expanded the holding part of the lower incoming groove. An example of the pushing tool torn from the incoming line opening part provided in the back surface side of an optical outlet main body is shown, (a) is a perspective view of a pushing tool, (b) is a longitudinal cross-sectional view of the use condition of a pushing tool.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
The two-core optical outlet according to the present invention is composed of two members: a lid portion 2 and an optical outlet body 1 that can be covered with the lid portion 2. 1 to 5, the optical outlet main body 1 has mounting holes 3 at a total of four locations on the bottom plate part 4 in the vertical and horizontal directions, and light is transmitted by screws (not shown) that pass through the mounting holes 3. The outlet body 1 is attached to an appropriate place, for example, exposed on the wall surface of a building, or installed in a distribution board.

  As shown in FIGS. 1, 2 (a), 3, 4, and 5, the upper incoming groove 5 that is linear at both the upper and lower intermediate positions on the upper surface of the bottom plate portion 4 of the optical outlet body 1. In addition, the lower incoming groove 6 is formed symmetrically in the vertical position of the optical outlet main body 1 so that the optical cable K can be inserted from either the upper or lower direction as required.

  Further, an extra length portion of the optical cable K inserted along the upper incoming groove 5 or the lower incoming groove 6 is wound around the substantially central portion of the optical outlet body 1 (actually a position near the upper incoming groove 5). A winding storage portion 7 for storage is formed. When the optical cable K is stored in a bent state, the winding storage portion 7 is a pair of left and right inner frames 7a and an outer frame that are both arcuate to restrict the optical cable K from being less than the allowable bending radius. It is surrounded by 7b.

  A plurality of locking pieces 8 project inward from each other at the upper ends of the inner frame 7a and the outer frame 7b so that the optical cable K stored in the winding storage portion 7 is not separated upward. It is held by the locking piece 8.

  Further, as shown in FIG. 4 (c), the optical cable K is inserted from the back side of the optical outlet main body 1 into a symmetrical position surrounded by the inner frame 7a and the outer frame 7b of the optical outlet main body 1. Inlet openings 9a and 9b are provided.

  2, 3, 4 (a), 4 (b), 5 (a), and 5 (b), one side of the incoming line openings 9 a and 9 b has an upper side Further, a rectangular plate-like pushing tool 10 for pushing the optical cable K into the upper incoming groove 5 or the lower incoming groove 6 is attached via a pair of left and right severable cutout portions 11.

  This pushing tool 10 is used after the tearing portion 11 is forcibly torn and separated, and as shown in FIG. 7 (a), comprises a handle 10a at one end and a pushing portion 10b at the other end, As shown in FIG. 7 (b), the push-in portion 10b has a tip that is alternately tilted forward and backward in order to push the optical cable K into the upper incoming groove 5 or the lower incoming groove 6 as shown in FIG. 7B. Four pushing inclined surface portions 12a, 12b, 12c, 12d are formed continuously along the longitudinal direction of the distal end surface.

  As shown in FIG. 1, FIG. 2 (a), FIG. 3, FIG. 4, FIG. 5 and FIG. 6 (a), a pair of left and right for individually entering two optical cables K in the upper entry groove 5 Both-side entry grooves 5a and 5b are provided, and a gripping portion 13 is formed on the rear end side in the entry direction. In addition, a center insertion groove 5c for receiving a two-core optical cable K is provided at the center of the both-side entry grooves 5a and 5b, and an inner wall surface of the center entry groove 5c is used to hold the two-core optical cable K. The holding portion 14 (and the locking portion 19) is formed. Further, a core wire branching portion 16 for branching and entering both exposed core wires o of the two-core optical cable K is formed on the rear end portion side in the incoming direction of the center incoming groove 5c.

  As shown in FIGS. 6 (a) and 6 (b), the core wire branching portion 16 is formed by a wide chamber that leads to a pair of left and right grooves for individually passing the branched core wires o in a bifurcated manner. Each gripping portion 15 is formed on the inner wall surface of each groove, and is gripped by the gripping portion 15 (and the locking portion 19) in a state where the exposed core wire o is covered with the protective tube 17 It is as.

  Further, as shown in FIGS. 6A and 6B, at least the gripping portion 13 of the gripping portions 13, 14, 15 is formed by a pressing piece 18 such as a spring having elasticity. A plurality of protrusion-shaped locking portions 19 are provided on the optical cable K holding surface side of the pressing piece 18.

  As shown in FIG. 1, FIG. 2 (a), FIG. 3, FIG. 4, FIG. 5, and FIG. 6 (b), the lower incoming groove 6 also has the same structure as the upper incoming groove 5 described above. Incoming line grooves 6a and 6b and a central incoming line groove 6c are provided. In addition, since arrangement | positioning, a shape, etc. of the holding parts 13, 14, 15 and the core wire branching part 16 are the same as the case of the upper side incoming groove 5, the description is abbreviate | omitted.

  In addition, the entrance portions of the both-side incoming grooves 5a, 5b (6a, 6b) and the central incoming grooves 5c (6c) are closed in an opposing manner by the protruding claw-shaped incoming lid 20 erected from the bottom plate portion 4. When either one of the both side incoming grooves 5a, 5b (6a, 6b) or the central incoming groove 5c (6c) is used, the incoming lid 20 corresponding to these is cut and opened.

  An optical connector plug P attached to the tip of the optical cable K wound and accommodated in the winding accommodating portion 7 is connected to both sides of the upper incoming groove 5 or the lower incoming groove 6 of the optical outlet body 1. The optical connector adapter Q is disposed in a state of being engaged and supported by a pair of left and right holding frames 21. At this time, the space 22 between the rear side of the optical connector adapter Q and the left and right sides of the winding housing portion 7 is the housing portion 22 of the optical connector plug P.

  Then, after the two optical cables K respectively inserted from the both-side incoming grooves 5a and 5b (6a and 6b) are wound around the winding housing portion 7, each optical cable K is individually connected to the optical connector adapter P by the optical connector plug P. Q is to be connected.

  In addition, the two-core optical cable K that has been inserted from the center insertion groove 5c (6c) is covered with the protective tube 17 on each core wire o that is branched and exposed at the core wire branching portion 16, and is wound around the winding storage portion 7. Later, each core wire o is individually connected to the optical connector adapter Q by the optical connector plug P. It is also possible to connect the optical connector plug P to the optical connector adapter Q in advance and attach the optical connector adapter Q and the optical connector plug P to the optical outlet main body 1.

  The lid portion 2 is closed and fixed to the optical outlet body 1 by patching the groove portion and the claw portion. The lid portion 2 is attached to the optical outlet body 1 on either the upper or lower side of the lid portion 2. A pair of left and right cutout openings 2a is formed corresponding to the positions of the optical connector adapters Q on both sides, and at the center of both cutout openings 2a, three incoming lids 20 erected on the optical outlet body 1 are provided. Three fitting recesses 2b are formed so as to be fitted.

Next, an example of assembly and use of the configuration configured as described above will be described.
First, when using either of the both side incoming grooves 5a, 5b (6a, 6b) or the central incoming groove 5c (6c), the incoming lid 20 corresponding to these is cut and opened. Further, the pushing tool 10 attached to one side of the incoming wire openings 9 a and 9 b is removed in advance by cutting the cut-out portion 11. And the optical outlet main body 1 is suitably attached to a place, for example, the wall surface of a building, with a screw (not shown) passed through the attachment hole 3.

  As shown in FIG. 4A, when two optical cables K are connected from the upper side of the optical outlet body 1, the two incoming cables 5 a and 5 b of the upper incoming groove 5 are inserted. At this time, the two optical cables K are gripped by the gripping portions 13 by pressing the pushing portions 10b at the tips of the pushing tools 10 into the two optical cables K and pushing them from above. Each optical cable K is individually connected to the optical connector adapter Q by the optical connector plug P after being wound around the winding storage portion 7 and held by the locking piece 8. At this time, each optical connector plug P is accommodated in the accommodating portion 22, and each optical connector adapter Q is arranged in a state of being engaged and supported by a pair of left and right holding frames 21. Then, the optical outlet body 1 is closed by the lid 2.

  As shown in FIG. 4B, when two optical cables K are connected from the lower side of the optical outlet body 1, the two optical cables K are respectively connected to the both side incoming grooves 6 a and 6 b of the lower incoming groove 6. Each optical cable K is individually connected to the optical connector adapter Q by the optical connector plug P in the same manner as described above.

  As shown in FIG. 4C, when two optical cables K are connected from the back side of the optical outlet body 1, the two optical cables K are inserted into the incoming openings 9a and 9b, respectively, In the same manner, each optical cable K is individually connected to the optical connector adapter Q by the optical connector plug P after being wound around the winding storage portion 7 and held by the locking piece 8.

  As shown in FIG. 5 (a), when the two-core optical cable K is branched and connected from the upper side of the optical outlet body 1, the two-core optical cable K is inserted into the central entry groove 5 c of the upper entry groove 5. And gripping by the gripping part 14. At this time, the protection tube 17 is put on each of the core wires o branched and exposed from the two-core optical cable K by the core wire branching portion 16 and held by the gripping portion 15. Then, each core wire o is individually connected to the optical connector adapter Q by the optical connector plug P after being wound around the winding storage portion 7 and held by the locking piece 8. At this time, each optical connector plug P is accommodated in the accommodating portion 22 in the same manner as described above, and each optical connector adapter Q is disposed in a state where it is engaged and supported by a pair of left and right holding frames 21. The main body 1 is closed by the lid portion 2.

  As shown in FIG. 5 (b), when the two-core optical cable K is branched and connected from the lower side of the optical outlet body 1, the two-core optical cable K is inserted into the central incoming groove 6 c of the lower incoming groove 6. Each core wire o is individually connected to the optical connector adapter Q by the optical connector plug P in the same manner as described above.

K optical cable P optical connector plug Q optical connector adapter o core wire 1 optical outlet body 2 lid portion 2a notch opening portion 2b fitting recess 3 mounting hole 4 bottom plate portion 5 upper incoming groove 5a, 5b both incoming groove 5c central incoming groove 6 lower side Incoming line groove 6a, 6b Both side incoming line groove 6c Central incoming line groove 7 Winding storage part 7a Inner frame 7b Outer frame 8 Locking piece 9a, 9b Incoming line opening 10 Pushing tool 10a Handle 10b Pushing part 11 Cutout parts 12a, 12b, 12c , 12d Push-in inclined surface portions 13, 14, 15 Gripping portion 16 Core wire branching portion 17 Protective tube 18 Presser piece 19 Locking portion 20 Line entry lid 21 Holding frame 22 Housing portion

Claims (1)

A lid, and an optical outlet body that can be covered by the lid;
Incoming grooves formed respectively in the middle of the upper width direction of the optical outlet main body and in the middle of the lower width direction so as to allow the optical cable to enter,
An optical cable grip provided on the rear end side of the incoming groove in the incoming direction,
A winding storage portion provided in a substantially central portion of the optical outlet body so as to wind and store the extra length of the optical cable;
An optical connector adapter built in on both sides of the incoming groove on the top or bottom of the optical outlet body to connect the optical connector plug of the optical cable housed in the optical outlet body,
The incoming groove is a double-sided incoming groove that allows two optical cables to enter each of the optical cables and to be individually connected to the optical connector adapter by an optical connector plug;
A central insertion groove for inserting the two-core optical cable so that each of the branched core cables of the two-core optical cable is individually connected to the optical connector adapter by an optical connector plug;
The holding part of the optical cable is formed of a holding piece having elasticity, and is provided with a locking part on the optical cable holding surface side of the holding piece,
The central insertion groove is provided with a core wire branching portion into which both core wires of a two-core optical cable are branched and introduced on the rear end side in the direction of insertion of the central insertion groove, and the exposed both core wires are covered with a protective tube, It shall be gripped by the gripping part,
2. A two-core optical outlet, wherein a bottom opening portion of the optical outlet body is provided with an incoming opening for allowing an optical cable to enter from the back side of the optical outlet body .

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