JP4252435B2 - Optical wiring box and optical assembly module provided with the wiring box - Google Patents

Description

  The present invention relates to an optical wiring box and an optical assembly module including the optical wiring box, and more particularly to an optical wiring box capable of mounting optical wirings at high density and an optical assembly module including the optical wiring box.

  Conventionally, an optical fiber storage case or an optical adapter base for enabling optical connection with an optical termination box, an optical module, an optical coupler module, an optical splitter module, etc. to connect an optical cable between a subscriber system and a station Have been developed (see, for example, Patent Document 1 and Patent Document 2).

  As an optical fiber connection type, for example, an optical cable in a station is branched into a single-core optical fiber, and the tip of each single-core optical fiber is terminated by an optical connector, and this terminated optical connector is an optical fiber storage case. Connected to the inner optical adapter. On the other hand, an optical connector terminated to a single optical fiber on the subscriber side is connected to the optical adapter outside the optical fiber storage case (see, for example, Patent Document 3). Depending on the application, an optical component such as an optical splitter or a coupler may be interposed between the optical fibers.

  In any case, as described above, in the optical fiber storage case, the external optical fiber can be switched by the optical connector and the optical adapter.

  Referring to FIGS. 7 and 8A, 8B, and 8C, generally, an optical fiber storage case 101 as a conventional optical wiring box is a flat vertical type, and stores a large number of optical fibers. As shown in FIG. 9, for example, the optical assembly module 107 is formed by arranging the cases 101 side by side on the optical wiring rack 105 of the optical termination box 103 so that the lateral sides of the optical fiber storage cases 101 are adjacent to each other. Is configured.

  As shown in FIGS. 7 and 8C, the optical adapter 109 attached to the optical fiber storage case 101 is terminated at the center of the optical adapter 109 with the end of the single-core optical fiber 111. The connector insertion hole 115 is provided to connect and disconnect the optical connector 113, and the optical adapter 109 is attached to the optical fiber storage case 101 on both the left and right sides of the connector insertion hole 115 in FIG. A mounting portion 117 is projected. Each mounting portion 117 is provided with a screw insertion hole (not shown) through which a mounting screw 119 as a fixture for fixing the optical adapter 109 by screwing.

  The optical fiber storage case 101 is a flat vertical type in which the case main body 121 forms a substantially rectangular parallelepiped, and an adapter mounting plate for mounting a plurality of optical adapters 109 on the front surface of the case main body 121 having a flat width dimension W1. The adapter mounting plate 123 is provided with adapter mounting holes (not shown) through which the plurality of optical adapters 109 are inserted in parallel in the vertical direction in FIG.

  On both sides of the adapter mounting hole, adapter abutting surfaces are provided for abutting the mounting portions 117 on both sides of the plurality of optical adapters 109 in parallel in the vertical direction in FIG. Furthermore, a screw hole (not shown) for screwing the mounting screw 119 is provided on the adapter abutting surface. Accordingly, the plurality of optical adapters 109 are juxtaposed in the vertical direction in FIG. 7 and inserted into the adapter mounting hole so that the mounting portions 117 on both sides of the plurality of optical adapters 109 are abutted against the adapter abutting surfaces. Reference numeral 109 denotes a mounting screw 119 inserted into two screw insertion holes of the mounting portion 117 and fixed to the adapter abutting surface with screws.

  7 and 8 (A), (B), (C), a plurality of optical adapters 109 are screwed and fixed to the adapter abutment surface with mounting screws 119. As other fixing methods, A leaf spring provided in each optical adapter 109 itself is also used. That is, the optical adapter 109 has leaf springs projecting on opposite side surfaces on the side to be inserted into the adapter mounting hole, and when the optical adapter 109 is inserted into the adapter mounting hole, It is fixed by a reaction force that presses the inner wall surface of the mounting hole.

  In addition, the adapter mounting plate 123 is provided with a space 127 for displaying the line number display 125 corresponding to each of the plurality of optical adapters 109 on the left outer side in FIG. Further, in FIG. 7 and FIG. 8C of the adapter mounting plate 123, a screw insertion hole (not shown) for inserting the mounting screw 129 is provided in the upper part, and the lower part is abutted against the optical wiring rack 105. The protrusion 131 for abutting is provided. Therefore, in the optical fiber storage case 101, the adapter mounting plate 123 and the butting projection 131 are abutted against a predetermined position of the optical wiring rack 105, and the mounting screw 129 is inserted into the screw insertion hole of the adapter mounting plate 123. Then, it is fixed to the optical wiring rack 105 with screws.

In addition to the connector insertion holes 115 on the outer side of the optical fiber storage case 101 shown in FIG. 7, each of the plurality of optical adapters 109 has a connector insertion on the inner side of the optical fiber storage case 101. A hole (not shown) is provided, and an optical connector terminated at the tip of the single-core optical fiber 111 housed in the optical fiber housing case 101 is connected to the connector insertion hole.
JP 2000-292646 A Japanese Patent Laid-Open No. 10-90525 JP-A-8-271761

  By the way, in recent years, as the number of optical communication subscribers has increased, the number of optical fiber storage cores has increased, and accordingly, in the limited optical wiring rack 105 in the optical assembly module 107, It has been required to store optical fibers at high density.

  However, in the conventional optical fiber storage case 101, each of the plurality of optical adapters 109 is screwed to the adapter mounting plate 123 via the screw insertion holes of the mounting portions 117 on both sides by the mounting screws 119. Needs to be opened to the surface side. In addition, each optical adapter 109 needs to display a corresponding line number display 125. This line number display 125 avoids the screw insertion hole of the mounting portion 117, and either one of the left and right sides in FIGS. 7 and 8C. There is a problem that it is not possible to reduce the size (thinning) because it is necessary to provide on both sides. As a result, the horizontal width W1 of each optical fiber storage case 101 is increased by the space 127 of the line number display 125, and as a result, the limited optical wiring rack that constitutes the optical assembly module 107 as a whole. There is a problem that the number of optical fiber storage cases 101 stored in 105 is reduced.

  Further, since the line number display 125 of each optical adapter 109 needs to be provided on both sides, as shown in FIGS. 7 and 8C, the space 127 of the line number display 125 has one side on the left and right sides (in the figure). In the case of only the left side), it is necessary to stick a line number display sticker on the side surface of the optical adapter 109 that does not have the space 127 of the line number display 125 (right side in the figure). This makes it difficult to confirm the wire number from the front. In particular, when there is no space 127 for the line number display 125 on both sides of the optical adapter 109, there is a problem that it is more difficult to confirm the line number.

  In addition, when the optical adapter 109 is attached by the screw fixing method using the mounting screw 119, two screws are attached per optical adapter 109. Therefore, when a large number of optical adapters 109 are attached, the number of operations is large. In addition to being enormous and time-consuming, there is a problem in that the yield is poor because a large number of screw holes need to be processed in the adapter mounting plate 123.

  On the other hand, in the fixing method using the leaf spring provided in each optical adapter 109 itself, there is a problem that the play of the optical adapter 109 is large.

  The present invention has been made to solve the above-described problems.

An optical wiring box according to the present invention includes a plurality of optical adapters that are protruded on both sides in a first direction and that are provided with mounting portions having screw insertion holes arranged in parallel in a second direction orthogonal to the first direction. In the optical distribution box attached to the front,
A plurality of optical adapters arranged in parallel in the second direction on a case main body having a width dimension substantially the same as the total length in the first direction of the attachment portions on both sides of the optical adapter, and an end surface of the case main body having the width dimension. An adapter mounting hole portion to be inserted; and adapter abutting portions for mounting the mounting portions on both sides of the plurality of optical adapters in parallel in the second direction on both sides of the adapter mounting hole portion in the first direction; The mounting portions in the second direction of the mounting portions of the plurality of optical adapters arranged in parallel have substantially the same width as the length in the first direction of the mounting portions on both sides of the plurality of optical adapters butted against the adapter butting portion. A presser member having a length dimension substantially the same as the overall length of
On the surface side of each pressing member, line number indications corresponding to the plurality of optical adapters are provided, and the pressing members are formed in through holes formed at positions on both outer sides in the second direction of the pressing members. Further, the screw is fixed to the adapter abutting portion with a mounting screw through the screw insertion hole of the mounting portion corresponding to the through hole.

The light collecting module according to the present invention includes a plurality of optical adapters that are protruded on both sides in the first direction and that are provided with mounting portions having screw insertion holes arranged in parallel in a second direction orthogonal to the first direction. In an optical assembly module comprising an optical wiring box attached to the front surface, and an optical wiring rack in which a plurality of optical wiring boxes are arranged in parallel in the first direction,
Each optical wiring box has a case body having a width dimension substantially the same as the overall length in the first direction of the mounting portions on both sides of the optical adapter, and the plurality of optical adapters on the end face of the case body having the width dimension. The adapter mounting hole portion that is inserted in parallel in the second direction and the mounting portions on both sides of the plurality of optical adapters that are arranged in parallel in the second direction and abut on both sides of the adapter mounting hole portion in the first direction. The adapter abutting portion and the mounting portions of the plurality of optical adapters arranged in parallel and having the same width as the length in the first direction of the mounting portions on both sides of the plurality of optical adapters abutted against the adapter abutting portion A presser member having a length that is substantially the same as the entire length of the mounting portion in the second direction .
On the surface side of each pressing member, line number indications corresponding to the plurality of optical adapters are provided, and the pressing members are formed in through holes formed at positions on both outer sides in the second direction of the pressing members. Further, the screw is fixed to the adapter abutting portion with a mounting screw through the screw insertion hole of the mounting portion corresponding to the through hole.

  As understood from the means for solving the above problems, according to the present invention, the optical wiring box is mounted on both sides by inserting a plurality of optical adapters in parallel in the second direction into the adapter mounting holes. After the portion is abutted against the adapter abutting portion, the attachment portions on both sides of the plurality of optical adapters are respectively pressed and fixed over the entire length in the second direction by the holding members, so that the installation work of the plurality of optical adapters is performed. It can be carried out easily and in a short time.

In addition, the position where the pressing member is fixed by using the mounting screw may be easily provided because one or a plurality of positions in the second direction may be small.

  In addition, since the pressing member is fixed at a small number of locations, wire number indications corresponding to a plurality of optical adapters can be provided on the surface of the pressing member, so the width dimension of the case body in the first direction is It is possible to make the dimensions substantially the same as the total length of the attachment portions on both sides in the first direction, and to realize a reduction in thickness. And even if it is an optical wiring box of this thin module, the line number display of a some optical adapter can be visually recognized from the front.

  In the optical assembly module, since the optical wiring box is a thin module, a large number of the above optical wiring boxes can be assembled on a limited range of optical wiring racks. In addition, since each optical wiring box can visually recognize the wire number display of a plurality of optical adapters from the front, there is no need to provide an interval between adjacent optical wiring boxes, and the optical wiring boxes can be arranged adjacently in parallel. it can. As a result, it becomes possible to store optical fibers at high density.

  Embodiments of the present invention will be described below with reference to the drawings.

  Referring to FIGS. 1, 2 and 3A, 3B, and 3C, the optical wiring box 1 according to this embodiment is a flat vertical type, and a plurality of optical adapters 3 are mounted. ing.

  Each of the optical adapters 3 is provided with a connector insertion hole 9 at the center of which the optical connector 7 having the end of the single-core optical fiber 5 can be connected and disconnected. This connector insertion hole Mounting portions 11 for mounting the optical adapter 3 to the optical wiring box 1 are projected on both sides of the first direction 9 (left and right direction in FIG. 1). Each mounting portion 11 is provided with a screw insertion hole 15 through which, for example, a mounting screw 13 is inserted as a fixture for fixing the optical adapter 3 with screws.

  Further, each optical adapter 3 has a connector difference on the opposite side opposite to the connector insertion hole 9 located outside the optical wiring box 1 shown in FIG. An insertion hole (not shown) is provided, and the optical connector 17 terminated at the tip of the single-core optical fiber 5 housed in the optical wiring box 1 is connected to the connector insertion hole.

  Further, the case main body 19 of the optical wiring box 1 is a flat vertical type that is substantially a rectangular parallelepiped, and as shown in FIG. 3 (C), the mounting portions 11 on both sides of the optical adapter 3 in the first direction. It has substantially the same width W0 as the full length. An adapter mounting plate 21 for mounting a plurality of optical adapters 3 is provided on the front surface of the case body 19 having the width dimension W0. The plurality of optical adapters 3 are attached to the adapter mounting plate 21 in the first direction. An adapter mounting hole 23 is provided for insertion in parallel in a second direction (vertical direction in FIG. 1) orthogonal to.

  Further, the adapter mounting plate 21 has adapter abutting portions for abutting the mounting portions 11 on both sides of the plurality of optical adapters 3 in parallel in the second direction on both sides of the adapter mounting hole 23 in the first direction. For example, an adapter abutting surface 25 is provided.

  Further, the attachment portions 11 on both sides of the plurality of optical adapters 3 that are abutted against the adapter abutting surface 25 are respectively pressed and fixed in the second direction by, for example, a retaining plate 27 as a retaining member. It is configured. In this embodiment, the above adapter is screwed and fixed with mounting screws 13 at the positions of the mounting portions 11 of the two optical adapters 3 on both ends in the second direction among the plurality of optical adapters 3. A total of four screw holes 29 for screwing the mounting screws 13 are provided in the abutting surface 25. On the other hand, each holding plate 27 has a width dimension substantially the same as the length in the first direction of the mounting portion 11 of the optical adapter 3, and approximately the entire length in the second direction of the mounting portions 11 of the plurality of optical adapters 3 arranged in parallel. Through holes 31 having the same length dimension and capable of inserting the mounting screws 13 are provided on both ends in the longitudinal direction of the presser plate 27.

  In addition, a wire number display 33 corresponding to each of the plurality of optical adapters 3 is provided on the surface of the pressing plate 27.

  Further, a screw insertion hole 37 through which the mounting screw 35 is inserted is provided in the upper part of the adapter mounting plate 21 in FIG. 1, and a plurality of optical wiring boxes 1 are assembled in the lower part to constitute an optical assembly module. An abutting projection 41 is provided to abut against the optical wiring rack 39. The optical wiring rack 39 is provided with a screw hole 43 that is screwed into the mounting screw 35 in order to fix the adapter mounting plate 21.

  Therefore, in the optical wiring box 1, the adapter mounting plate 21 and the butting projection 41 are abutted against a predetermined position of the optical wiring rack 39, and the mounting screw 35 is inserted into the screw insertion hole 37 of the adapter mounting plate 21. Then, it is fixed to the screw hole 43 of the optical wiring rack 39 with screws. Details of the light collecting module will be described later.

  With the above configuration, after the plurality of optical adapters 3 are inserted into the adapter mounting hole 23 in parallel in the vertical direction in FIG. 1 and the mounting portions 11 on both sides of the plurality of optical adapters 3 are abutted against the adapter abutting surface 25. The two presser plates 27 are pressed over the entire length in the second direction against the front (left diagonally lower side in FIG. 1) surfaces of the mounting portions 11 on both sides of the plurality of optical adapters 3, and then the mounting screws 13 are mounted. A plurality of screw plates 29 are inserted into the through holes 31 on both ends in the longitudinal direction of each holding plate 27 and the screw insertion holes 15 of the mounting portion 11 of the optical adapter 3 and screwed into the screw holes 29 of the adapter abutment surface 25. The entire optical adapter 3 is fixed to the adapter abutting surface 25.

  That is, since only a small number of four screw holes 29 need be provided on the adapter abutting surface 25, the work time for screw hole processing can be greatly reduced, and it is only necessary to screw with the four mounting screws 13. The mounting of the plurality of optical adapters 3 on the adapter abutment surface 25 is easily completed in a short time.

  Note that the position where the holding plate 27 is screwed with the mounting screw 13 is not limited to the position of the mounting portion 11 of the optical adapter 3 on both ends in the second direction as described above, and the mounting of an arbitrary optical adapter 3 is possible. The position of the part 11 may be used. Alternatively, at the position of the mounting portion 11 of one optical adapter 3 that is located approximately in the center of the length in the second direction of the plurality of optical adapters 3, via one through hole 31 that is approximately in the center in the longitudinal direction of the presser plate 27. The mounting screws 13 may be used for screwing. Alternatively, without using the screw insertion holes 15 of the mounting portion 11 of the optical adapter 3, intervening members such as blocks provided with screw insertion holes are provided on both outer sides in the second direction of the plurality of optical adapters 3. The mounting plate 13 may be inserted into a screw insertion hole provided in the interposed member, and the presser plate 27 may be screwed to the adapter abutting surface 25.

  In addition, since a small number of mounting screws 13 are screwed by the long presser plate 27 as described above, the wire number display 33 corresponding to each of the plurality of optical adapters 3 can be provided on the surface of the presser plate 27. As a result, the adapter mounting plate 21 does not need to be provided with a display space separately from the plurality of optical adapters 3 as in the prior art, so the lateral width in the first direction of the case body 19 of the optical wiring box 1 is It can be made into the dimension W0 substantially the same as the full length of the 1st direction of the attaching part 11 of both sides. Incidentally, the conventional optical fiber storage case 1 has a width dimension W1 (see FIG. 8C) of, for example, 30 mm, but the optical fiber storage case 1 of this embodiment reduces the width dimension W0 to, for example, 25 mm. It became possible.

  Accordingly, since the line number display 33 is displayed on both sides of the adapter insertion hole 9 of the optical adapter 3, even in a thin module in which a space for the line number display 125 as in the conventional case cannot be provided separately, the line number is displayed. The display 33 can be viewed from the front. Moreover, there is no need to provide a space between adjacent optical fiber storage cases in order to confirm the wire number display displayed on the side surface of the optical adapter as in the prior art, and the optical wiring boxes 1 are arranged adjacently in parallel. Is possible.

  The optical wiring box of this embodiment is widely applied to products that connect and fix a plurality of adapters, such as optical modules, patch panels, adapter panels, and the like.

  4 and 5, a large number of the optical wiring boxes 1 are adjacent to the optical wiring rack 39 of the optical termination box 45, for example, in which the side surfaces of the flat vertical type horizontal width direction of each optical wiring box 1 are adjacent. In other words, in other words, the light collecting modules 47 are configured side by side so as to be adjacent in the first direction. In FIG. 4, a large number of optical wiring boxes 1 are arranged in three stages.

  In this optical assembly module 47, as shown in FIG. 5, even if a large number of optical wiring boxes 1 are arranged side by side so as to be adjacent to each other without a gap, line number indications 33 of all the optical wiring boxes 1 are displayed. Is easily visible from the front.

  Referring to FIG. 6, the optical assembly module 47 of this embodiment is branched from, for example, an optical cable 51 in a station 49 to a single-core optical fiber 5, and the tip of each single-core optical fiber 5 is an optical connector. Terminated at 7. Each terminated optical connector 7 is inserted and connected to an adapter insertion hole 9 (see FIG. 1) on the left side in FIG. 6 of the corresponding optical adapter 3 of the optical wiring box 1. Inside the case main body 19 of the optical wiring box 1, another optical connector 17 is inserted into an adapter insertion hole (not shown) on the right side of the optical adapter 3 in FIG. 6. Each optical connector 17 is terminated with a single optical fiber 5, and each single optical fiber 5 is connected to an optical connector 53 on the right side in FIG.

  On the other hand, the optical termination box 45 is provided with a plurality of optical adapters 55 connected to the plurality of optical connectors 53 of the optical wiring box 1, and the optical wiring box 1 is attached to the optical termination box 45 with mounting screws 35. Each optical connector 53 is configured to be inserted and connected to a corresponding optical adapter 55 when attached to the optical wiring rack 39. Further, an optical connector 57 terminated on the subscriber-side single optical fiber 5 can be connected to and disconnected from each optical adapter 55. As described above, in the optical wiring box 1, an external optical fiber can be switched by the optical connector and the optical adapter 3.

It is a disassembled perspective view of the optical wiring box of embodiment of this invention. It is a perspective view of the optical wiring box in the state where FIG. 1 is incorporated. The optical wiring box of embodiment of this invention is shown, (A) is a top view, (B) is a side view, (C) is a front view. FIG. 3 is an overall schematic explanatory view of a light collecting module 47 in which many optical wiring boxes according to an embodiment of the present invention are assembled. FIG. 5 is a partial perspective view of the light collecting module of FIG. 4. It is a schematic explanatory drawing which shows the connection state of the optical assembly module 47 which assembled many optical wiring boxes of embodiment of this invention. It is a perspective view of the conventional optical fiber storage case. The conventional optical fiber storage case is shown, (A) is a top view, (B) is a side view, (C) is a front view. It is the whole schematic explanatory drawing of the optical assembly module which assembled many conventional optical fiber storage cases.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical wiring box 3 Optical adapter 5 Single core optical fiber 7 Optical connector 9 Connector insertion hole 11 Mounting part 13 Mounting screw (fixing tool)
15 Screw insertion hole 19 Case body 21 Adapter mounting plate 23 Adapter mounting hole 25 Adapter abutting surface (adapter abutting portion)
27 Presser plate (presser member)
33 Wire number display 39 Optical wiring rack 41 Abutting projection 45 Optical termination box 47 Optical assembly module

Claims (2)

In an optical wiring box in which a plurality of optical adapters protruding on both sides in the first direction and provided with mounting portions having screw insertion holes are arranged in parallel in a second direction orthogonal to the first direction and attached to the front surface ,
A plurality of optical adapters arranged in parallel in the second direction on a case main body having a width dimension substantially the same as the total length in the first direction of the attachment portions on both sides of the optical adapter, and an end surface of the case main body having the width dimension. An adapter mounting hole portion to be inserted; and adapter abutting portions for mounting the mounting portions on both sides of the plurality of optical adapters in parallel in the second direction on both sides of the adapter mounting hole portion in the first direction; The mounting portions in the second direction of the mounting portions of the plurality of optical adapters arranged in parallel have substantially the same width as the length in the first direction of the mounting portions on both sides of the plurality of optical adapters butted against the adapter butting portion. A presser member having a length dimension substantially the same as the overall length of
On the surface side of each pressing member, line number indications corresponding to the plurality of optical adapters are provided, and the pressing members are formed in through holes formed at positions on both outer sides in the second direction of the pressing members. Further, the optical wiring box is fixed to the adapter abutting portion with a mounting screw through a screw insertion hole of the mounting portion corresponding to the through hole. An optical wiring box for mounting a plurality of optical adapters protruding on both sides in the first direction and provided with mounting portions having screw insertion holes in parallel in a second direction orthogonal to the first direction and attached to the front surface And an optical wiring module comprising a plurality of optical wiring boxes arranged in parallel in the first direction, in an optical assembly module,
Each optical wiring box has a case body having a width dimension substantially the same as the overall length in the first direction of the mounting portions on both sides of the optical adapter, and the plurality of optical adapters on the end face of the case body having the width dimension. The adapter mounting hole portion that is inserted in parallel in the second direction and the mounting portions on both sides of the plurality of optical adapters that are arranged in parallel in the second direction and abut on both sides of the adapter mounting hole portion in the first direction. The adapter abutting portion and the mounting portions of the plurality of optical adapters arranged in parallel and having the same width as the length in the first direction of the mounting portions on both sides of the plurality of optical adapters abutted against the adapter abutting portion A presser member having a length that is substantially the same as the entire length of the mounting portion in the second direction .
On the surface side of each pressing member, line number indications corresponding to the plurality of optical adapters are provided, and the pressing members are formed in through holes formed at positions on both outer sides in the second direction of the pressing members. Further, the light collecting module is fixed to the adapter abutting portion with a mounting screw through a screw insertion hole of the mounting portion corresponding to the through hole.

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