JP2005338556A - Optical fiber terminal box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical fiber terminal box in which optical couplers are stored without reducing the storage space of optical connecting sections when optical couplers are loaded in the box. <P>SOLUTION: In an optical fiber terminal box 1, a plurality of optical couplers 11 is stored in a casing 2 and a plurality of input side optical paths 6 which are taken into the casing 2 are respectively branched and connected to a plurality of output side optical paths 7 through the optical couplers 11. An optical fiber sheet 10 is provided to fix the optical couplers 11 which are sandwiched between a plurality of flexible sheets 14. Input side optical fibers 12 and output side optical fibers 13 of the optical couplers 11 are pulled out to the external between the flexible sheets 14. The input side optical fibers 12 are connected to the input side optical paths 6 and the output side optical fibers 13 are connected to the output side optical paths 7. The output side optical fibers 13 use the optical fiber terminal box 1 in which groups, that respectively have one output side optical fiber 13 from the plurality of optical couplers 11, are provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical termination box having an optical component such as an optical coupler.

With the spread of optical communication networks, optical termination boxes are installed in buildings such as buildings and houses, and optical connection points between optical fiber cables introduced from outdoors and indoor optical lines (indoor cables, etc.) It is often stored in the end box. In recent years, an optical communication network using a PON (Passive Optical Network) has been widely constructed. Here, an optical line is provided by an optical coupler (or an optical splitter, which is simply referred to as an optical coupler in the present invention) installed in the middle of an optical line. To branch off.
Conventionally, when an optical coupler is mounted in the optical termination box, the optical coupler is accommodated in a tray. For example, Patent Document 1 describes a coupler storage tray that can store an optical connection portion between optical fibers and an optical coupler.
JP-A-10-307214

In the conventional optical termination box, the optical connection portion between the optical fibers and the optical coupler are stored in one tray. Therefore, when using the optical coupler, the number (space) that can store the optical connection portion is small. There is a problem that the size of the tray becomes large if these are reduced and can be stored sufficiently. Further, since the optical coupler and the optical connection portion are accommodated in the same tray, it is inconvenient to handle the optical fiber wiring and to store the extra length.
To deal with these problems, it is conceivable to separate the tray for storing the optical connection portion and the tray for storing the optical coupler. However, this increases the number of trays, so the size and cost of the optical termination box are increased. There is a problem that increases.
Therefore, there is a demand for a technique that can cope with the case where the optical line is wired using an optical component such as an optical coupler or the case where the optical line is wired without using the optical component, and the cost and space can be reduced.

  The present invention has been made in view of the above circumstances, and accommodates an optical component such as an optical coupler without reducing the storage space of the optical connection portion when an optical component such as an optical coupler is mounted in an optical termination box. It is an object of the present invention to provide an optical termination box that can be used.

In order to solve the above problems, the present invention includes a plurality of optical couplers housed in a casing, and a plurality of input-side optical lines drawn into the casing through a plurality of output-side light beams via the optical couplers. An optical termination box branchingly connected to a path, comprising an optical fiber sheet fixed so that the optical coupler is sandwiched between a plurality of flexible sheets, and an input side optical fiber and an output side of the optical coupler The optical fiber is drawn out from between the flexible sheets, the input side optical fiber is connected to the input side optical line, and the output side optical fiber is connected to the output side optical line. The output side optical fibers are divided into groups each having one output side optical fiber from a plurality of optical couplers.
In this optical termination box, a connection tray for storing a connection portion between the input side optical fiber and the input side optical line and / or a connection portion between the output side optical fiber and the output side optical line is provided, The optical fiber sheet can be provided between the connection tray and the bottom wall of the casing.
The casing is formed with a pressing piece that protrudes from the bottom wall of the casing and has a protruding end bent along the bottom wall of the casing. A structure that is attached to the casing by being elastically contacted between the bottom wall of the casing and the pressing piece in a state in which the extending section extending to the end of the flexible sheet is bent. Is also possible.
A guide wall around which the extra length of the optical fiber is wound is provided on the casing so as to protrude from the bottom wall of the casing, and the edge of the flexible sheet has a shape along the side surface of the guide wall. The optical fiber sheet may be configured to be attached to the housing such that the recess is along the side surface of the guide wall.

Further, the present invention is an optical termination box in which an optical component is housed in a housing, and an input side optical line drawn into the housing is connected to an output side optical line via the optical component, The optical component includes an optical fiber sheet fixed so as to be sandwiched between a plurality of flexible sheets, and the input side optical fiber and the output side optical fiber of the optical component are drawn out from between the flexible sheets. The input-side optical fiber is connected to the input-side optical line, the output-side optical fiber is connected to the output-side optical line, and the casing includes a bottom wall of the casing A holding piece is formed so that the protruding end is bent along the bottom wall of the housing, and the optical fiber sheet extends from the end of the flexible sheet. The bottom wall of the housing and the presser with the protruding part bent Being elastic contact between the provide optical termination box, characterized in that mounted on the housing.
A guide wall around which the extra length of the optical fiber is wound is provided on the casing so as to protrude from the bottom wall of the casing, and the edge of the flexible sheet has a shape along the side surface of the guide wall. The optical fiber sheet may be configured to be attached to the housing such that the recess is along the side surface of the guide wall.

According to the present invention, since the optical coupler is mounted on the optical fiber sheet, it is easy to handle and can be easily attached to and detached from the housing. Since the optical coupler can be placed outside the tray, when mounting an optical coupler in the optical termination box, the space for connecting the connection tray can be stored in the optical connection without reducing the storage space for the optical connection. It can be used effectively.
Furthermore, in the optical fiber sheet, the output side optical fibers of the optical coupler are divided into groups each having one output side optical fiber from each of the plurality of optical couplers, so that it is possible to reduce mistakes in wire numbers at the time of connection. .
The optical fiber sheet has an extending portion that extends to the end portion of the flexible sheet, and the extending portion is elastically contacted between the bottom wall of the housing and the pressing piece in a bent state. In this case, it is not necessary to provide a structure for supporting the optical fiber sheet on the housing side. Therefore, even when wiring is performed without using an optical component such as an optical coupler (that is, an optical fiber sheet on which the optical component is mounted), the inside of the optical termination box can be used without waste.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a front view showing an example of a state in which a cover and a connection tray are removed, which is a main part of the optical termination box of this embodiment. 2A is a front view and FIG. 2B is a schematic wiring diagram showing an example of an optical fiber sheet used in the optical termination box of this embodiment. 3A is a front view and FIG. 3B is a schematic wiring diagram showing another example of an optical fiber sheet used in the optical termination box of this embodiment. FIG. 4 is an exploded perspective view for schematically explaining the attachment state of the connection tray and the cover in the optical termination box of this embodiment. FIG. 5 is a front view showing a state in which the optical fiber sheet is removed from the optical termination box of this embodiment. FIG. 6 is a cross-sectional view taken along the line SS of FIG. FIG. 7 is a cross-sectional view showing a state in which the optical fiber sheet is cut in a direction along the optical coupler, the input side optical fiber, and the output side optical fiber. Fig.8 (a) is sectional drawing which follows the AA line of FIG. FIG. 8B is a cross-sectional view taken along the line BB in FIG.

As shown in FIG. 4, the optical termination box of this embodiment includes a bottomed box-shaped casing 2, a cover 4 that covers the front opening 3 (upper side in FIG. 4) of the casing 2, and a casing 2 and a connection tray 5 coupled so as to be pivotable with respect to 2.
Although this optical termination box 1 will be described in detail later, as shown in FIG. 1, an input side optical line 6 drawn into the housing 2 is connected via an optical coupler 11 housed in the housing 2. Each of them is branched and connected to a plurality of output-side optical lines 7. An input side optical fiber 12 connected to the input side optical line 6 is extended to one end side of the optical coupler 11. An output side optical fiber 13 connected to the output side optical line 7 is extended to the other end side of the optical coupler 11.

  As shown in FIGS. 1 and 5, the housing 2 includes a rectangular bottom wall 20 and side walls 21 a, 21 b, 21 c, and 21 d that project from the bottom wall 20 (front side in FIG. 1). Have Reference numeral 20a denotes a boss for attaching a fixture (screw or the like; not shown) for fixing the optical termination box 1 to the wall surface of the building. In FIG. 1, these bosses 20 a protrude from three locations on the bottom wall 20 of the housing 2.

In the front view of FIG. 1, input side insertion ports 22 through which the input side optical line 6 is inserted are opened at three positions on the left side and the left and right sides of the upper side wall 21a.
Further, the upper side wall 21a, the lower side wall 21b, and the right side wall 21d have an output side insertion port 23 through which the output side optical line 7 is inserted, and output side rays from the optical termination box 1 are opened. The output direction of the road 7 can be selected from three directions, upper and lower right.

Here, the input-side optical line 6 is not particularly limited, and examples thereof include optical fiber cables (optical cables) such as single-core drop cables, multi-core drop cables, round cables, and indoor cables. .
The output-side optical line 7 is not particularly limited, and examples thereof include a single-core or multi-core drop cable, an indoor cable, and an optical fiber cord (optical cord).
In the present invention, the terms “input side” and “output side” refer to the side where the number of input / output terminals (usually one) is “input side” and the side where many input / output terminals are “ It is referred to as “output side”, and the optical fiber and the optical cable connected to the optical coupler are defined similarly. The “output side” may be referred to as “branch side”.

  A fitting recess (gripping tool fixing structure) 22b into which an optical line gripping tool 22a for gripping the input side optical path 6 can be detachably fitted is formed inside the input side insertion port 22. An appropriate optical line gripper 22a according to the type and number of the input side optical lines 6 can be attached to be selectable and replaceable. Further, guide grooves (not shown) for detachably mounting the blocking plate 22c are formed on both sides of the peripheral edge portion of the input side insertion port 22, and depending on the direction and number of insertion of the input side optical line 6 The input side insertion port 22 that is not used can be closed.

  Similarly, a columnar protrusion (gripping tool fixing structure) 23b to which an optical line gripping tool 23a for gripping the output side optical path 7 can be detachably fitted is provided inside each output side insertion opening 23. Projecting from the bottom wall 20 of the housing 2 on both sides of the opening 23, an appropriate optical line gripping tool 23a according to the type and number of the output side optical lines 7 can be attached in a selectable and replaceable manner. Further, guide grooves (not shown) for detachably mounting the blocking plate 23c are formed on both sides of the peripheral edge portion of the output side insertion port 23, depending on the direction and number of the output side optical line 7 to be inserted. The output side insertion port 23 that is not used can be closed.

  As shown in FIG. 4, the cover 4 is configured such that the insertion piece 4 a protruding from the edge of the cover 4 is inserted and engaged with the insertion port 2 a formed in the upper and lower side walls 21 a and 21 b of the housing 2. It is attached to the front side edge of the side walls 21 a to 21 d of the housing 2 so as to cover the opening 3 of the housing 2.

  The connection tray 5 is a tray that stores a connection portion (for example, fusion splicing or mechanical splice) between optical fibers, a connection length of the optical fiber, and the like. A connection part (not shown) between the input side optical fiber 12 and the input side optical line 6 of the optical coupler 11 and a connection part (not shown) between the output side optical fiber 13 and the output side optical line 7 of the optical coupler 11 It can be stored in the connection tray 5.

  A hinge 5a is formed on one side edge of the connection tray 5 (upper left in FIG. 4; the side facing the left side wall 21c of the housing). As shown in FIG. 1, the hinge 5 a is rotatably supported by a hinge support portion (rotating mechanism) 24 protruding from the bottom wall 20 of the housing 2. As a result, the connection tray 5 opens outward from the opening 3 of the housing 2 when taken out from the housing 2, and conversely, it is stored inside the housing 2 when pushed into the housing 2. ing.

The central part inside the housing 2 has a surplus length for wiring the extra lengths of the optical lines 6 and 7 on the input side and the output side (the extra lengths of the optical fibers 6a and 7a exposed at the end portions of the optical cables 6 and 7). A long wiring portion 25 is formed. The extra length wiring portion 25 is provided with a cylindrical guide wall 26 (which may be not only circular but also oval) protruding from the bottom wall 20 of the casing 2 for winding the extra length of the optical fiber. Has been.
In FIG. 1, the optical fibers 6a, 7a, 12, and 13 are not shown in a portion that is wired between the extra length wiring portion 25 and the connection tray 5 (not shown).

  Around the guide wall 26, a plurality of pressing pieces 28 a, 28 b, 28 c protruding from the bottom wall 20 of the housing 2 are formed. As shown in FIG. 6, the protruding end portions 27 of the pressing pieces 28 a, 28 b, 28 c are bent so as to follow the bottom wall 20 of the housing 2. These holding pieces 28a, 28b, and 28c restrict the optical fiber wiring in the extra length wiring portion 25, and the optical fiber protrudes to the outside of the extra length wiring portion 25, the outside of the opening 3 of the housing 2, or the like. It is for preventing.

Here, of the pressing pieces, the reference numeral 28a is for restricting the wiring of the optical fibers 6a and 7a wound around the guide wall 26 from the inner peripheral side, and these inner peripheral pressing pieces. 28 a projects from the vicinity of the guide wall 26, and the projecting end 27 extends to the outside of the guide wall 26.
The holding piece 28b is for restricting the wiring of the optical fibers 6a and 7a wound around the guide wall 26 from the outer peripheral side. The outer holding piece 28b is more than the guide wall 26. The protruding end 27 extends toward the guide wall 26.
The pressing pieces denoted by reference numeral 28 c regulate the wiring of the input side optical fiber 12 and the output side optical fiber 13 of the optical fiber sheet 10 to be described later. Projecting at the outer edge, the projecting end 27 extends to the outside of the extra length wiring portion 25.

In the optical termination box 1 of this embodiment, the optical fiber sheet 10 on which the optical coupler 11 is mounted is attached to the surplus length wiring portion 25. That is, the optical fiber sheet 10 is disposed between the connection tray 5 and the bottom wall 20 of the housing 2.
The number of optical fiber sheets 10 is one here, but the present invention is not limited to this. Two or more optical fiber sheets 10 may be laminated and used.

  As shown in FIGS. 2, 3, and 7, the optical fiber sheet 10 includes an optical coupler 11 and the optical fiber 12 extending on both sides between a plurality of (here, two) flexible sheets 14. , 13 are fixed so as to be sandwiched, and the tip ends of the optical fibers 12, 13 are drawn out from between the flexible sheets 14. Since the optical fiber sheet does not particularly require a reinforcing structure or a holding mechanism for the optical fiber, the structure is simple. In addition, the number of parts is reduced, the handling is easy, and the cost can be reduced.

  Although it does not specifically limit as the flexible sheet | seat 14, For example, it consists of a polyimide (PI), a polyethylene terephthalate (PET), polyethylene (PE), nylon, soft polyurethane, etc., and the thin sheet | seat which has flexibility is used. Is preferred. The flexible sheets 14 are bonded to each other with, for example, a rubber-based or acrylic-based adhesive (particularly, a room-temperature pressure-sensitive adhesive or pressure-sensitive adhesive).

The optical fiber sheet 10 shown in FIG. 2 has two optical couplers 11 having one input and four outputs (1 × 4). For each optical coupler 11, one input side optical fiber 12 and one output side optical fiber 13 are provided. Four are provided.
The optical fiber sheet 10 shown in FIG. 3 has two optical couplers 11 with one input and sixteen outputs (1 × 16). For each optical coupler 11, one optical fiber 12 on the input side and one optical fiber 13 on the output side are provided. Sixteen are provided. In FIG. 3A, the output side optical fiber 13 is partially omitted.
In the present invention, the number and the number of the optical couplers 11 mounted on the optical fiber sheet 10 and the number of the optical fibers 12 and 13 are not particularly limited. For example, light of 1 input 8 output (1 × 8) A coupler or the like can also be used.

Further, the output side optical fibers are divided into sets P each having one output side optical fiber 13 from a plurality of optical couplers 11 (here, all the optical couplers 11 in the optical fiber sheet 10). In the case of this embodiment, each set P includes one output side optical fiber 13 from one optical coupler 11 and one output side optical fiber 13 from the other optical coupler 11.
As shown in FIGS. 8 (a) and 8 (b), each set P of the output side optical fibers is taped together with a resin coating T or the like, and is formed of a multi-fiber optical fiber ribbon (here, two fibers). So that it can be handled.

  As a method for manufacturing the optical fiber sheet 10, for example, two flexible sheets 14 with a single-sided adhesive are prepared, and the optical coupler 11 and the optical fiber 12, between the two flexible sheets 14 and 14, are prepared. 13 and sandwiching both flexible sheets 14 and 14 together with an adhesive. Thereby, the optical fiber sheet 10 in which the optical coupler 11 and the optical fibers 12 and 13 are sandwiched and fixed between the flexible sheets 14 can be obtained.

  As shown in FIGS. 2 (a) and 3 (a), the optical fiber sheet 10 of the present embodiment has both ends of the flexible sheet 14 (the left and right ends in FIGS. 2 (a) and 3 (a)). A tongue-shaped extending portion 15 is extended to the top. The wiring of the optical coupler 11 and the optical fibers 12 and 13 avoids the extending portion 15, and this extending portion 15 can be bent freely. As shown in FIG. 7, the extending portion 15 is elastically contacted between the bottom wall 20 of the housing 2 and the pressing piece 28b in a bent state. The optical fiber sheet 10 is attached to the housing 2 by the elastic force of the extension 15.

  Furthermore, in the optical fiber sheet 10 of the present embodiment, a concave portion 16 that is cut out in a shape along the side surface of the guide wall 26 is formed at one edge of the flexible sheet 14. The optical fiber sheet 10 is attached to the housing 2 such that the recess 16 is along the side surface of the guide wall 26. In the optical fiber sheet 10, the wirings of the optical coupler 11 and the optical fibers 12 and 13 are wired so as to go around the periphery of the concave portion 16. As a result, the end portions of the optical fibers 12 and 13 extended between the flexible sheets 14 and 14 pass through the position of the holding piece 28c without performing extra wiring in the extra length wiring portion 25. , Can be directed to the connection tray 5.

Further, at the edge of the concave portion 16 of the flexible sheet 14, the notches 17 and 17 for avoiding the inner circumferential side pressing piece 28a installed in the vicinity of the guide wall 26 are located at positions corresponding to the pressing piece 28a. (Two places here) are formed.
Further, a concave portion 18 for avoiding the boss 20a is provided at the outer edge portion of the flexible sheet 14 opposite to the concave portion 16 when the optical fiber sheet 10 is attached to the extra length wiring portion 25. It is formed at such a position.

Hereinafter, an example of a method for using the optical termination box 1 of the present embodiment will be described.
The optical termination box 1 optically connects the optical fibers 12 and 13 at both ends of the optical coupler 11 to the optical fibers 6a and 7a of the optical lines (optical cables) 6 and 7 held and fixed to the optical line grippers 22a and 23a. The extra lengths of the optical fibers 6a and 7a of the optical lines 6 and 7 are accommodated in the extra length wiring section 25 by winding the wiring around the guide wall 26 so as to be regulated by the holding pieces 28a and 28b. The
A connection part (not shown) between the input side optical fiber 12 and the input side optical line 6 of the optical coupler 11 and a connection part (not shown) between the output side optical fiber 13 and the output side optical line 7 of the optical coupler 11 are connected. It is stored in the tray 5. The extra lengths of the optical fibers 12 and 13 at both ends of the optical coupler 11 are guided to the connection tray 5 so that the wiring is regulated by the pressing piece 28 c and stored in the connection tray 5. As described above, since the optical fiber in which the extra length is accommodated in the connection tray 5 and the optical fiber in which the extra length is accommodated in the extra length wiring portion 25 are divided, the extra length can be easily stored and organized. .

According to the optical termination box of this embodiment, since the optical coupler is mounted on the optical fiber sheet, it is excellent in handleability and can be easily attached to and detached from the housing. Since the optical coupler can be placed outside the tray, when mounting an optical coupler in the optical termination box, the space for connecting the connection tray can be stored in the optical connection without reducing the storage space for the optical connection. It can be used effectively.
For example, when one input-side optical line is a communication-system optical line and the other input-side optical line is a video distribution-system optical line, one optical coupler is connected to a communication-system light beam via one input-side optical fiber. By connecting to the other optical coupler and the other optical coupler via the other input side optical fiber to the video distribution system optical line, the optical signal of each optical line can be branched by the optical coupler. The output side optical fibers are divided into groups each having one output side optical fiber from all the optical couplers in the optical fiber sheet (for example, they are grouped together by tape coating). The output from the video distribution system can be handled as a set. In this way, mistakes in wire numbers when connecting optical fibers can be reduced.

  Since the optical fiber sheet is mounted between the connection tray and the bottom wall of the housing, the optical fiber sheet and the optical fibers at both ends of the optical coupler are less likely to get in the way when the connection tray is operated (rotated or the like). By laying the flexible sheet so that it is in close contact with the bottom wall of the housing, the space above the optical fiber sheet can be used for the extra length of the optical fiber, and the optical fiber sheet can be stored. The space required for this can be reduced to the minimum.

The optical fiber sheet is elastically contacted between the bottom wall of the housing and the pressing piece with the extended portion extending to the end of the flexible sheet bent, so that the optical fiber sheet is supported. It is not necessary to provide a structure for doing so on the housing side. Therefore, even when wiring without using an optical component (optical fiber sheet) such as an optical coupler, the inside of the optical termination box can be used without waste.
Note that the optical component mounted on the optical fiber sheet is not limited to the optical coupler. The optical component may be any shape and size that can be sandwiched between flexible sheets, and various optical components can be employed.

  A recess cut out in a shape along the side surface of the guide wall of the extra length wiring portion is formed at the edge of the flexible sheet of the optical fiber sheet so that the recess of the optical fiber sheet extends along the side surface of the guide wall. Therefore, the optical fiber sheet is in a posture that holds the guide walls on both sides of the recess, and can be fitted with good fit. Therefore, the position of the optical fiber sheet is not easily displaced in the extra-length wiring portion, and inconveniences such as vibration are unlikely to occur with respect to the optical fibers at both ends of the optical coupler (optical component) extended from the optical fiber sheet.

As mentioned above, although this invention has been demonstrated based on suitable embodiment, this invention is not limited to the above-mentioned example, Various modifications are possible in the range which does not deviate from the summary of this invention.
For example, the specific structure and dimensions of the optical termination box such as the housing, the shape of the optical fiber sheet, the type and number of branches of the optical coupler, the type and number of optical fibers, the configuration and method of the optical fiber wiring, etc. are changed as appropriate. Is possible.
The number of optical fiber sheets housed in the housing is not limited to one, and can be two or more. The plurality of optical fiber sheets can be stacked on each other and housed in a housing, for example. Alternatively, a plurality of locations for storing the optical fiber sheet can be provided in the housing.

  The present invention can be used for laying an optical line or an optical network using an optical component such as an optical coupler.

It is a principal part of the optical termination box of this invention, Comprising: It is a front view which shows an example of the state which removed the cover and the connection tray. It is the (a) front view and (b) typical wiring diagram which show an example of the optical fiber sheet used for the optical termination box of this invention. It is the (a) front view and (b) typical wiring diagram which show the other example of the optical fiber sheet used for the optical termination box of this invention. It is a disassembled perspective view which illustrates typically the attachment state of the connection tray and cover in the optical termination box of FIG. It is a front view which shows the state which removed the optical fiber sheet from the optical termination box of FIG. It is sectional drawing which follows the SS line | wire of FIG. It is sectional drawing which shows the state which cut | disconnected the optical fiber sheet | seat in the direction in alignment with an optical coupler, an input side optical fiber, and an output side optical fiber. (A) It is sectional drawing which follows the AA line of FIG. (B) It is sectional drawing which follows the BB line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical termination box, 2 ... Housing, 5 ... Connection tray, 6 ... Input side optical line (optical cable), 7 ... Output side optical line (optical cable), 10 ... Optical fiber sheet, 11 ... Optical coupler (optical splitter) , Optical components), 12 ... input side optical fiber, 13 ... output side optical fiber, 14 ... flexible sheet, 15 ... extension part, 16 ... concave part of the flexible sheet, 20 ... bottom wall of the casing, 26 ... guide wall, 27 ... protruding end, 28a, 28b, 28c ... pressing piece, P ... set of output side optical fiber.

Claims (6)

A plurality of optical couplers (11) are housed in the housing (2), and a plurality of input-side optical lines (6) drawn into the housing are respectively connected to the plurality of output-side optical lines via the optical couplers. An optical termination box branch-connected to (7),
The optical coupler includes an optical fiber sheet (10) fixed so as to be sandwiched between a plurality of flexible sheets (14), and includes an input side optical fiber (12) and an output side optical fiber (13) of the optical coupler. ) Is drawn out from between the flexible sheets, the input side optical fiber is connected to the input side optical line, the output side optical fiber is connected to the output side optical line, The optical termination box (1), wherein the output side optical fibers are divided into sets (P) each having one output side optical fiber from a plurality of optical couplers.   A connection tray (5) that houses a connection portion between the input side optical fiber and the input side optical line and / or a connection portion between the output side optical fiber and the output side optical line, the optical fiber sheet, The optical termination box according to claim 1, wherein the optical termination box is provided between the connection tray and a bottom wall (20) of the housing.   The casing is formed with a pressing piece (28b) that protrudes from the bottom wall of the casing and is bent so that the protruding end (27) is along the bottom wall of the casing. The fiber sheet is elastically contacted between the bottom wall of the housing and the pressing piece in a state where the extending portion (15) extending to the end portion of the flexible sheet is bent, The optical termination box according to claim 1, wherein the optical termination box is attached to the housing.   The casing is provided with a guide wall (26) around which the extra length of the optical fiber is wound, protruding from the bottom wall of the casing, and at the edge of the flexible sheet, a side surface of the guide wall is provided. The optical fiber sheet is attached to the housing so that the recess is along the side surface of the guide wall. The optical termination box according to any one of claims 1 to 3. The optical component (11) is housed in the housing (2), and the light that connects the input side optical line (6) drawn into the housing to the output side optical line (7) through the optical component. Termination box,
The optical component includes an optical fiber sheet (10) fixed so as to be sandwiched between a plurality of flexible sheets (14), and an input side optical fiber (12) and an output side optical fiber (13) of the optical component. ) Is drawn out from between the flexible sheets, the input side optical fiber is connected to the input side optical line, the output side optical fiber is connected to the output side optical line,
The casing is formed with a pressing piece (28b) that protrudes from the bottom wall of the casing and is bent so that the protruding end (27) is along the bottom wall of the casing. The fiber sheet is elastically contacted between the bottom wall of the housing and the pressing piece in a state where the extending portion (15) extending to the end portion of the flexible sheet is bent, An optical termination box mounted on the housing.   The casing is provided with a guide wall (26) around which the extra length of the optical fiber is wound, protruding from the bottom wall of the casing, and at the edge of the flexible sheet, a side surface of the guide wall is provided. The optical fiber sheet is attached to the housing so that the recess is along the side surface of the guide wall. The optical termination box according to claim 5.

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