JP2004198709A - Optical fiber termination box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical fiber termination box capable of shortening the connecting operation time. <P>SOLUTION: The optical fiber termination box 1 has an optical fiber part 5 for connection which has its lengthwise center part wound and also another optical fiber B connected to its one end by fusion splicing or through a connector, a sealing resin part 6 which seals the lengthwise center part of the optical fiber part 5 for connection, an optical fiber connector 7 which is disposed at the other end of the optical fiber part 5 for connection extending from the sealing resin part 6, an optical fiber connector 7 which has the optical fiber connector 7 mounted at one end and another optical fiber connector F mounted at the other end, and is mounted, an adapter 4 which optically connects connectors F's, and a housing 2. The adapter 4 has its one end directed to inside the housing and the other end directed to outside the housing and is disposed to the housing 2. The optical fiber connector 7 can be mounted at one end of the adapter 4 from inside the housing. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical fiber termination box.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an optical fiber termination box is used to branch-connect an optical fiber cable to an optical fiber cord or an optical fiber cable. In an optical fiber termination box, the optical fiber cable drawn in from one end of the box is branched for each optical fiber, and then the optical fiber cable or branch optical fiber cable drawn in from the other end of the box. Optical connection is made by a method such as connector connection or fusion splicing.
[0003]
In an optical fiber termination box, an optical fiber cable and a branching optical fiber cord or a branching optical fiber cable are not directly optically connected but are optically connected in the following manner. That is, a connection optical fiber portion is provided between an optical fiber cable and a branch optical fiber cord or a branch optical fiber cable, an optical fiber cable is provided at one end of the connection optical fiber portion, and a branch optical fiber is provided at the other end. By optically connecting the cord or the optical fiber cable for branching, respectively, the optical connection between them is implemented. The optical fiber termination box has a structure in which a connection optical fiber portion is housed. (See Patent Document 1)
[0004]
[Patent Document 1]
Japanese Utility Model Application Laid-Open No. 7-16902 [0005]
[Problems to be solved by the invention]
However, in the optical fiber termination box for optically connecting the optical fiber cable and the branching optical fiber in this manner, it takes time and effort to handle the connection optical fiber portion during the optical connection work, and furthermore, the optical fiber termination box. It takes time and effort to store the connecting optical fiber section in the inside, and also requires a storage space. This has been a factor that hinders a reduction in connection work time and a factor that hinders high-density storage.
[0006]
Therefore, an object of the present invention is to provide an optical fiber termination box capable of shortening the connection operation time and achieving high-density storage.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problem, the present invention has the following configuration. That is, the present invention provides a connection optical fiber portion in which a central portion in the longitudinal direction is wound and another optical fiber is fusion-spliced or connected to one end thereof, and the longitudinal direction of the connection optical fiber portion. A sealing resin portion for sealing the central portion, an optical fiber connector provided at the other end of the connection optical fiber portion, and the optical fiber connector mounted at one end and another optical fiber connector at the other end. An adapter having a configuration to be mounted and having an adapter for optically connecting these mounted optical fiber connectors, and a housing. The adapter is provided in the housing with one end facing the inside of the housing and the other end facing the outside of the housing. The optical fiber connector can be attached to one end of the adapter from inside the housing.
[0008]
With the above configuration, the present invention facilitates handling of the connection optical fiber portion in the housing because the connection optical fiber portion is sealed with the sealing resin portion, The connection optical fiber portion can be stored with high storage efficiency.
[0009]
The branch connection work of the optical fiber cable using the optical fiber termination box is performed as follows. That is, first, another optical fiber is optically connected to one end of the connection optical fiber portion extending from the sealing resin portion in the housing. At this time, since the central portion in the longitudinal direction of the connection optical fiber portion is sealed and fixed by the sealing resin portion, the optical connection work becomes easy. On the other hand, another optical fiber connector is attached to the other end of the adapter facing the outside of the housing. Thus, the other optical fiber connector is optically connected to the optical fiber connector. This optical connection operation is also facilitated through the adapter.
[0010]
In addition, it is preferable that the optical fiber connector and the sealing resin portion are already configured as follows at the time of shipment from a factory. That is, the optical fiber connector is preferably mounted on one end of the adapter, and the sealing resin portion is preferably housed in the housing. Then, the operation of the optical fiber termination box at the work site is further facilitated.
[0011]
In addition, the connection optical fiber portion has a longitudinal central portion wound and disposed along a plane, and the sealing resin portion has a connection optical fiber portion wound and disposed along a plane. It is preferable that the sheet has a sheet shape for sealing the central portion in the longitudinal direction. This makes it easier to handle the connection optical fiber portion in the housing, and also allows the connection optical fiber portion to be stored in the housing with higher storage efficiency.
[0012]
In addition, the optical fiber storage thin plate further includes an optical fiber storage thin plate, the optical connection portion between one end of the connection optical fiber portion and the other optical fiber and the vicinity of the optical connection portion. It is preferable to store the extra length of the optical fiber, and it is preferable that the thin sheet material for storing the optical fiber and the sealing resin portion are housed in the housing in a state of being laminated on each other. Then, the optical connection portion between one end of the connection optical fiber portion and the other optical fiber and the extra length of the optical fiber near the optical connection portion are stored with high storage efficiency. Accordingly, the storage efficiency of the entire optical fiber termination box is further improved.
[0013]
Preferably, a flexible protective tube is fitted to at least one of the ends of the connecting optical fiber portion extending from the sealing resin portion. Further, it is preferable that a high-tensile fiber body is provided along at least one of the ends of the connection optical fiber portion extending from the sealing resin thin plate along the axial direction. With such a configuration, the end of the connection optical fiber portion extending from the sealing resin portion is less likely to be damaged.
[0014]
Further, at the adapter installation end of the housing, a housing extension that extends outward from this end is provided, and the housing extension is connected to the other optical fiber connector. It is preferable that a storage portion for the optical fiber structure is provided. Then, the optical fiber structure (optical fiber cord or the like) connected to another optical fiber connector can be efficiently stored.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an overall view of an optical fiber distribution network provided with an optical fiber termination box of the present invention. In this optical fiber distribution network, an information distribution source (information center or the like) 100 and an information distribution destination (each home or the like) 101 communicate with each other via a trunk optical fiber 102, a branch optical fiber 103, a drop optical fiber 104, and the like. Connected as possible. In FIG. 1, reference numeral 105 denotes an underground storage path for storing the main optical fiber 102, reference numeral 106 denotes a utility pole for supporting the main optical fiber 102, and reference numeral 107 denotes a closure for branching various optical fiber cables.
[0016]
In the optical fiber distribution network configured as described above, the optical fiber termination box 1 of the present embodiment is provided, for example, in an information center that is the information distribution source 100. The optical fiber termination box 1 branches an optical fiber cable A constituting the trunk optical fiber 102 and the like into an optical fiber, and then connects the branched optical fiber to another optical fiber B (in FIG. Optically connected to the fiber 108).
[0017]
In the following description, a configuration in which three optical fiber cables A having eight cores (two optical fiber ribbons of four cores) are branched and connected to 24 optical fibers using the optical fiber termination box 1. The present invention will be described by way of an example. However, such a configuration is merely an example of an embodiment of the present invention, and it goes without saying that the present invention can be implemented in any branching form.
[0018]
As shown in FIG. 2, the optical fiber termination box 1 is housed in a storage box 109 so as to be able to be pulled out in a state where a plurality of layers are arranged. The optical fiber termination box 1 has a housing 2 as shown in FIG. The housing 2 has a flat rectangular shape with one main surface opened. A support portion 3 is provided on one side edge 2 a of the housing 2.
[0019]
The support portion 3 includes an outer peripheral clamp portion 3a for gripping the periphery of the optical fiber cable A, and a tension member clamp portion 3b for clamping the tension member D of the optical fiber cable A.
[0020]
An adapter 4 is provided on the other side edge 2 b of the housing 2. The adapter 4 has mounting portions 4a and 4b at both ends for mounting optical fiber connectors. The adapter 4 has a structure for optically connecting the two optical fiber connectors when the optical fiber connectors are mounted on the mounting portions 4a and 4b. The adapter 4 has a structure corresponding to one optical connection. Therefore, the adapter 4 has a number corresponding to the number of optical connections. In the present embodiment, 24 adapters 4 are provided because the number of optical connections of 24 fibers is an example of the configuration of the present invention. The adapter 4 is attached to the other side edge 2b of the housing 2 with one end (mounting portion 4a) facing the inside of the housing and the other end (mounting portion 4b) facing the outside of the housing. The adapters 4 are arranged in parallel and attached to the other side edge 2b.
[0021]
The optical fiber termination box 1 has an optical fiber section 5 for connection. As shown in FIG. 5, the connection optical fiber unit 5 is a first optical fiber (corresponding to another optical fiber in the claims) B taken out from the optical fiber cable A and a branch connection destination. This optical fiber is interposed between the two optical fibers B and C when optically connecting the second optical fiber C.
[0022]
As shown in FIGS. 3 and 4, the connection optical fiber section 5 has a sufficient fiber length (for example, several meters) to facilitate the branch connection operation of the optical fiber cable A. The number of the connection optical fiber portions 5 is set according to the number of optical connections, and in the present embodiment, has 24 optical fibers. However, in the present embodiment, the optical fiber constituting the connection optical fiber section 5 has, as a main structure, an optical fiber ribbon in which four optical fibers are bundled. Therefore, the connection optical fiber unit 5 includes six optical fiber ribbons as a main structure.
[0023]
A central portion 5a in the longitudinal direction of the connection optical fiber portion 5 is wound and disposed along a plane. The longitudinally sealed central portion 5a is sealed and fixed in a sealing resin portion 6 having a thin plate shape. Both end portions of the connection optical fiber portion 5 extend from the sealing resin portion 6 without being fixed and held by the sealing resin portion 6, and constitute extension portions 5b and 5c. In FIGS. 3 and 4, a part of the sealing resin part 6 is cut away to clarify the structure of the sealing resin part 6, and a part of the longitudinal center part 5a is exposed. are doing.
[0024]
A first optical fiber connector 8 is attached to one end of the connecting optical fiber portion 5 at one end thereof. The first optical fiber connector 8 has a configuration for simultaneously optically connecting four optical fibers (one tape core). Therefore, in the optical fiber termination box 1 of the present embodiment that performs 24-fiber optical connection, six first optical fiber connectors 8 are provided.
[0025]
A second optical fiber connector 7 is attached to an end of the other end side extension 5c of the connection optical fiber 5. The second optical fiber connector 7 has a configuration for optically connecting only one optical fiber. Therefore, in the optical fiber termination box 1 of the present embodiment for performing 24-fiber optical connection, 24 second optical fiber connectors 7 are provided.
[0026]
Although not shown, the sealing resin portion 6 is configured by laminating two thin resin materials. The sealing resin portion 6 sandwiches the longitudinal central portion 5a of the connecting optical fiber portion 5 between the two resin thin materials, thereby sealing and fixing the longitudinal central portion 5a.
[0027]
The sealing resin portion 6 is housed and fixed inside the housing 2. Specifically, four corners of the sealing resin portion 6 are fixed to the bottom surface of the housing 2 by screws.
[0028]
The second optical fiber connector 7 provided on the other end side extension portion 5c of the connection optical fiber portion 5 extends from the sealing resin portion 6 and is attached to the mounting portion 4a of the adapter 4 (inside the housing). It is attached from inside.
[0029]
The optical fiber termination box 1 is provided with an optical fiber storing thin plate member 9 in addition to the above basic configuration. In FIG. 3, a part of the optical fiber housing thin plate member 9 is cut away to expose the lower sealing resin part 6. As shown in FIG. 5 (a diagram showing the state of use of the optical fiber termination box 1), the optical fiber housing thin plate member 9 includes a connection optical fiber portion 5, an optical fiber cable A (first optical fiber B), And a fiber housing section 10 for housing an end portion (an extra length of the optical fiber) of the first optical fiber B near the optical connection section. The fiber housing section 10 has a winding claw 11 for winding the first optical fiber B including the optical connection section between the connection optical fiber section 5 and the first optical fiber B. The winding claw 11 is provided on a surface portion of the optical fiber housing thin plate material 9. The fiber storage section 10 is formed of a surface portion of the optical fiber storage thin plate material 9 and stores the first optical fiber B wound around the winding claw 11. The optical fiber storing thin plate 9 is provided with a cutout 9a for inserting a cable.
[0030]
The optical fiber housing thin plate member 9 is further laminated on the sealing resin portion 6 housed and arranged in the housing 2. Specifically, as shown in FIG. 6, the optical fiber housing thin plate material 9 is stacked and disposed above the sealing resin portion 6 via the spacer 12 and then fixed to the housing 2 by screwing. ing. The optical fiber housing thin plate material 9 forms a slight gap between itself and the sealing resin portion 6 by interposing the spacer 12, and is fixed to the housing 2 in this state.
[0031]
As described above, in the optical fiber termination box 1, the second optical fiber connector 7 provided on the other end side extension 5 c of the connection optical fiber section 5 is used in a manufacturing plant of the optical fiber termination box 1. It is attached to the adapter 4. Then, with the second optical fiber connector 7 attached to the adapter 4, the optical fiber termination box 1 is transported to the installation location. Therefore, it is not necessary to perform the work of attaching the second optical fiber connector 7 to the adapter 4 at the place where the optical fiber termination box 1 is installed, and accordingly, the work at the installation site of the optical fiber termination box 1 (optical connection work) Etc.) becomes easier.
[0032]
Further, the optical fiber termination box 1 has a structure that is hardly damaged by the connection optical fiber portion 5 due to vibration or the like generated when the optical fiber termination box 1 is transported to the installation site. This is because in the optical fiber termination box 1, the longitudinal central portion 5 a of the connection optical fiber portion 5 is sealed and fixed by the sealing resin portion 6.
[0033]
Furthermore, in the optical fiber termination box 1, the central portion 5 a in the longitudinal direction of the connection optical fiber portion 5 is housed in the housing 2 with the sealing resin portion 6 sealing it. The connecting optical fiber portion 5 has a relatively long length, usually several meters, and takes time and space to store it. On the other hand, in the optical fiber termination box 1, since the longitudinal central portion 5a of the connection optical fiber portion 5 is sealed with the sealing resin portion 6, it takes time to store the connection optical fiber portion 5. And space (storage space in the housing 2) is not taken up.
[0034]
Further, an optical connection portion between the one end side extension portion 5b of the connection optical fiber portion 5 and the first optical fiber B, and the first optical fiber B (extra length optical fiber portion) near the optical connection portion. Is stored in the housing 2 while being laminated on the sealing resin portion 6. Therefore, the optical connection portion between the one end side extension portion 5b of the connection optical fiber portion 5 and the first optical fiber B and the first optical fiber B (the extra length of the optical fiber) near the optical connection portion. The time and space for storage (storage space in the housing 2) are not required.
[0035]
Hereinafter, an optical connection operation between the optical fiber cable A and the second optical fiber C performed through the optical fiber termination box 1 at the installation site of the optical fiber termination box 1 will be described with reference to FIG. First, a coating (not shown) and a slot rod (a shaft body containing an optical fiber tape, which is not shown in the figure, are omitted at the connection end portions of three optical fiber cables A optically connected in the optical fiber termination box 1). ) Is removed, the first optical fiber B and the tension member D are taken out of the optical fiber cable A. The first optical fiber B has a configuration of an optical fiber ribbon in which four optical fibers are integrated. The first optical fiber B has a length of about 1 m. The tension member D has a length that reaches the tension member clamp 3b with the connection end of the optical fiber cable A attached to the outer peripheral clamp 3a. An optical fiber connector E is optically connected to and attached to the exposed end of the first optical fiber B.
[0036]
In this state, the connection end of the optical fiber cable A is inserted from the outside of the housing 2 into the outer peripheral clamp portion 3a and fixed by screws. Further, the tension member D of the optical fiber cable A is inserted into the tension member clamp portion 3b and fixed by screws.
[0037]
After the connection end of the optical fiber cable A is supported and fixed to the housing 2, the first optical fiber B extending from the outer peripheral clamp portion 3 a is wound around the winding claw 11 of the optical fiber housing thin plate material 9. Thus, the first optical fiber B is stored in the fiber storage unit 10. Further, one end-side extending portion 5b (with the second optical fiber connector 8) of the connecting optical fiber portion 5 extending from the sealing resin portion 6 disposed below the optical fiber storing thin plate member 9 is provided. It is taken into the optical fiber storing thin plate material 9 from the notch 9a.
[0038]
Then, the first optical fiber connector 8 (four cores) provided on the one end side extension part 5b of the connection optical fiber part 5 and the optical fiber connector E (four cores) of the first optical fiber B are connected to each other. Connected. Thus, the operation of supporting and fixing the optical fiber cable A to the housing 2 and the operation of optically connecting the optical fiber cable A and the connection optical fiber unit 5 are completed.
[0039]
Since the longitudinal central portion 5a of the connection optical fiber portion 5 is sealed by the sealing resin portion 6 and fixed to the housing 2, the above-described optical connection operation can be performed relatively easily.
[0040]
Further, the second optical fiber connector 7 provided on the other end side extension portion 5c of the connection optical fiber portion 5 is already attached to the adapter 4 when the optical fiber termination box 1 is manufactured. Therefore, in the optical connection between the optical fiber cable A and the second optical fiber C via the optical fiber termination box 1 performed at the installation site of the optical fiber termination box 1, the second optical fiber connector 7 is connected to the adapter 4 It is not necessary to carry out the work of mounting on the vehicle, and the work can be simplified by that much.
[0041]
After the optical fiber cable A (first optical fiber B) and the connection optical fiber section 5 are optically connected in the optical fiber termination box 1 as described above, the second optical fiber C is attached to the mounting section 4b of the adapter 4. Is mounted. Thereby, the second optical fiber C (one core) and each optical fiber (one core) of the connection optical fiber unit 5 are optically connected. Therefore, the optical fiber cable A (first optical fiber B) is optically connected to the second optical fiber C via the connecting optical fiber section 5 in the optical fiber termination box 1. In the present embodiment, three optical fiber cables A (six first optical fibers B) are branched and optically connected to 24 second optical fibers C.
[0042]
As shown in FIG. 7, a flexible protective tube 20 made of a soft resin may be fitted to the extension portions 5b and 5c provided at the ends of the connection optical fiber portion 5. Then, the extension portions 5b and 5c which move after the optical fiber cable A (the first optical fiber B) and the second optical fiber C are optically connected via the optical fiber termination box 1 are flexible. It is protected by the protection tube 20 and is hardly damaged.
[0043]
In addition, as shown in FIG. 8, a high-tensile fiber body 21 may be provided along the axial direction of the extension portions 5b and 5c provided at the ends of the connection optical fiber portion 5. Then, the extension portions 5b and 5c that float after the optical fiber cable A (the first optical fiber B) and the second optical fiber C are optically connected via the optical fiber termination box 1 are made of high-tensile fibers. It is protected by the body 21 and hardly damaged. In FIG. 8, reference numeral 23 denotes a cover.
[0044]
7 and 8, the flexible protective tube 20 or the high-tensile fiber body 21 is provided at the other end side extension portion 5c formed of one optical fiber. Needless to say, the flexible protective tube 20 or the high-tensile fiber body 21 is similarly provided in the one-end-side extension portion 5b formed of the fiber ribbon.
[0045]
Further, as shown in FIG. 9, a housing extension 2c may be provided on the other end edge 2b which is the adapter forming end of the housing 2. The housing extension 2c is formed by, for example, extending the housing bottom on the other end 2b side outward along the bottom surface direction. The housing extension 2c constitutes an optical fiber housing 2e by being surrounded by a side wall 2d. The optical fiber housing section 2e is provided for housing a second optical fiber C (usually composed of an optical fiber cord), which is one of the optical fiber structures connected to the optical fiber connector F. .
[0046]
It is preferable that the width w of the housing 2 including the optical fiber storage section 2e is the same as the storage width of the optical fiber termination box 1 in the storage box 109 shown in FIG. Such a shape can be realized by increasing the storage efficiency of the optical fiber termination box 1 including the connection optical fiber portion 5, but such storage can be realized by adopting the configuration of the present invention. Improvement in efficiency can be realized.
[0047]
If the configuration of FIG. 9 is adopted, it becomes possible to store the optical fiber termination box with the optical fiber storage section in the existing storage box 109 without changing its shape. Thereby, the storage efficiency of the second optical fiber C increases. In FIG. 9, the same parts as those in FIG. 1 and the like are denoted by the same reference numerals.
[0048]
In the above-described embodiment, the first optical fiber B and the connection optical fiber unit 5 are optically connected by the optical connector connection using the optical fiber connector E and the first optical fiber connector 8. However, it goes without saying that the first optical fiber B and the connection optical fiber portion 5 may be fusion spliced.
[0049]
Further, in the above-described embodiment, the support portion 3 is provided on the housing 2, but it is needless to say that the support portion 3 need not be provided on the housing 2.
[0050]
【The invention's effect】
As described above, according to the present invention, in addition to simplifying the handling of the connection optical fiber portion during the optical connection operation, the storage operation of the connection optical fiber portion in the optical fiber termination box is also simplified, To that extent, it is possible to promote a reduction in optical connection work time.
[0051]
In addition, by enclosing the connection optical fiber portion in the sealing resin portion and housing it in the housing, the storage efficiency of the connection optical fiber portion can be increased. This allows not only a large number of components to be stored in a limited storage volume of the housing, but also miniaturization of the optical fiber termination box.
[0052]
Further, by making the sealing resin portion into a thin plate shape, it becomes easier to handle the connection optical fiber portion in the housing, and furthermore, the connection optical fiber portion can be stored in the housing with higher storage efficiency. it can.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of an optical fiber distribution network provided with an optical fiber termination box of the present invention.
FIG. 2 is a diagram showing a configuration of a storage box in which the optical fiber termination box of the present invention is mounted.
FIG. 3 is a plan view showing a configuration of an optical fiber termination box according to one embodiment of the present invention.
FIG. 4 is a plan view showing a configuration of a connection optical fiber portion and a sealing resin portion constituting the optical fiber termination box of one embodiment.
FIG. 5 is a plan view showing a usage state of the optical fiber termination box of one embodiment.
FIG. 6 is an enlarged view of a main part of the optical fiber termination box of one embodiment.
FIG. 7 is an enlarged perspective view of a main part showing a modification of the present invention.
FIG. 8 is an enlarged view of a partially cutaway main part showing another modified example of the present invention.
FIG. 9 is a plan view of an optical fiber termination box showing still another modified example of the present invention.
[Explanation of symbols]
100 information distribution source 101 information distribution destination 102 trunk optical fiber 103 branch optical fiber 104 drop optical fiber 105 underground storage path 106 telephone pole 107 closure 108 local optical fiber 109 storage box 1 optical fiber termination box 2 housing 2a one side edge 2b etc. Side edge 2c Housing extension 2d Side wall 2e Optical fiber storage 3 Support 3a Outer circumference clamp 3b Tension member clamp 4 Adapter 4a mounting (inside) 4b mounting (outside)
5 Optical fiber portion for connection 5a Central portion in longitudinal direction 5b One end side extending portion 5c The other end side extending portion 6 Sealing resin portion 7 Second optical fiber connector 8 First optical fiber connector 9 Optical fiber storing thin plate material 9a cutout Reference Signs List 10 fiber storage section 11 winding claws A optical fiber cable B first optical fiber C second optical fiber E optical fiber connector F optical fiber connector 20 flexible protective tube 21 high-tension fiber 22 optical fiber core 23 coating

Claims (7)

Along with the central portion in the longitudinal direction is wound, another optical fiber at one end of the connection optical fiber for fusion splicing or connector connection,
A sealing resin portion for sealing the central portion in the longitudinal direction of the connection optical fiber portion,
An optical fiber connector provided at the other end of the connection optical fiber portion,
An adapter for optically connecting these optical fiber connectors to each other, comprising a configuration in which the optical fiber connector is mounted on one end and another optical fiber connector is mounted on the other end,
A housing;
Has,
The adapter is provided in the housing with one end thereof facing the inside of the housing and the other end facing the outside of the housing,
The optical fiber connector is attachable to one end of the adapter from inside the housing,
An optical fiber termination box, characterized in that: The optical fiber termination box according to claim 1,
The optical fiber connector is attached to one end of the adapter,
The sealing resin portion is housed in the housing,
An optical fiber termination box, characterized in that: The optical fiber termination box according to claim 1 or 2,
The connection optical fiber portion, the longitudinal central portion thereof is wound and disposed along a plane,
The sealing resin portion has a sheet shape for sealing a longitudinal central portion of the connection optical fiber portion wound and arranged along a plane,
An optical fiber termination box, characterized in that: The optical fiber termination box according to claim 3,
Further having an optical fiber storage thin plate material,
The optical fiber storage thin plate material is for storing an optical connection portion between one end of the connection optical fiber portion and the other optical fiber and an extra length of the optical fiber near the optical connection portion,
The optical fiber storage thin plate material and the sealing resin portion are stored in the housing in a state of being stacked on each other,
An optical fiber termination box, characterized in that: The optical fiber termination box according to any one of claims 1 to 4,
A flexible protective tube is fitted to at least one of the ends of the connection optical fiber portion extending from the sealing resin portion,
An optical fiber termination box, characterized in that: The optical fiber termination box according to any one of claims 1 to 5,
A high-tensile fiber body is provided along at least one of the ends of the connection optical fiber portion extending from the sealing resin portion along the axial direction thereof,
An optical fiber termination box, characterized in that: The optical fiber termination box according to any one of claims 1 to 6,
At the adapter installation end of the housing, a housing extension that extends outward from the end is provided, and the housing extension is provided with a light that is connected to the other optical fiber connector. A storage section for the fiber structure is provided,
An optical fiber termination box, characterized in that:

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