WO2021025053A1

WO2021025053A1 - Closure

Info

Publication number: WO2021025053A1
Application number: PCT/JP2020/029983
Authority: WO
Inventors: 智弘高梨; 克司縣
Original assignee: 株式会社フジクラ
Priority date: 2019-08-07
Filing date: 2020-08-05
Publication date: 2021-02-11

Abstract

The purpose of the present invention is to provide a closure which enables connection work to be performed more efficiently. A closure (1) according to the present invention is provided with: a plurality of trays (2); and a support part (3a) for supporting the plurality of trays in an attachable/detachable manner. Each of the plurality of trays (2) has: a first housing part (S1) for housing fusion connection parts between optical fibers included in a first optical fiber unit (U1) and optical fibers included in a second optical fiber unit (U2); and a second housing part (S2) for housing a first bundle part in which the first optical fiber unit is bundled by a bundle material (B) and a second bundle part in which the second optical fiber unit is bundled by the bundle material (B). The second housing part (S2) is divided, by a partition (24a), into a first area (A1) in which the first bundle part is housed and a second area (A2) in which the second bundle part is housed.

Description

closure

The present invention relates to closures.
The present application claims priority based on Japanese Patent Application No. 2019-145454 filed in Japan on August 7, 2019, and Japanese Patent Application No. 2019-145455 filed in Japan on August 7, 2019. The contents are used here.

Conventionally, as shown in Patent Document 1, a closure for accommodating a connection portion between two optical fiber cables has been used. The two optical fiber cables are introduced in the closure, and the optical fibers of each optical fiber cable are connected to each other inside the closure.

Japanese Patent Application Laid-Open No. 2007-306655

In recent years, the number of optical fibers included in optical fiber cables has increased. Therefore, when the optical fibers included in the two optical fiber cables are fused and connected to each other, if one worker performs all the connection work, the work time may become very long. In order to improve the work efficiency, it is conceivable that a plurality of workers perform the connection work at the same time, but in that case, it is preferable to increase the extra length of the optical fiber unit from the viewpoint of workability. However, the conventional closure has not been sufficiently considered for accommodating the extra length portion of the optical fiber unit, and there is room for improvement in improving the work efficiency.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a closure capable of performing connection work more efficiently.

In order to solve the above problems, the closure according to the first aspect of the present invention includes a plurality of first optical fiber units included in the first optical fiber cable and a plurality of second optical fibers included in the second optical fiber cable. A closure for holding a connection portion of the unit, comprising a plurality of trays and a support portion for detachably supporting the plurality of trays, each of the plurality of trays being included in the first optical fiber unit. A first accommodating portion accommodating a fusion splicing portion between an optical fiber and an optical fiber included in the second optical fiber unit, a first bundling portion in which the first optical fiber unit is bound by a bundle material, and the first. The two optical fiber units have a second bundling portion in which the optical fiber unit is bound by a bundling material, and a second accommodating portion for accommodating the second accommodating portion. It is divided into a first region and a second region in which the second bundle portion is housed.

In order to solve the above problems, the closure according to the second aspect of the present invention includes a plurality of first optical fiber units included in the first optical fiber cable and a plurality of second optical fibers included in the second optical fiber cable. A closure for holding a connection portion of a unit, comprising a plurality of trays and a support portion for detachably supporting the plurality of trays, the plurality of trays having a tray body, an inner lid, and an upper lid, respectively. The first optical fiber unit included in the first optical fiber unit and the optical fiber contained in the second optical fiber unit are accommodated between the tray main body and the inner lid. One accommodating portion was formed, and the first bundle portion in which the first optical fiber unit was bound by a bundle material and the second optical fiber unit were bundled by the bundle material between the inner lid and the upper lid. A second bundling portion and a second accommodating portion for accommodating the second bundling portion are formed.

According to the above aspect of the present invention, it is possible to provide a closure capable of performing the connection work more efficiently.

It is a perspective view of the closure which concerns on this embodiment. It is the figure which looked at the closure of FIG. 1 from the rear. It is the figure which looked at the tray of FIG. 1 from the right side. It is a perspective view of the tray of FIG. FIG. 4A is a perspective view of FIG. 4A with the upper lid open. It is a perspective view of the state which the inner lid of FIG. 4B is opened. It is a figure which showed the state which accommodates the optical fiber unit in the tray of FIG. 4C. It is a figure which showed the process following FIG. 5A. It is a figure which showed the process which follows FIG. 5B.

Hereinafter, the closure of the present embodiment will be described with reference to the drawings.
As shown in FIG. 1, the closure 1 has a plurality of trays 2 and a closure main body 3. As shown in FIG. 2, the closure body 3 has a support portion 3a. The plurality of trays 2 are detachably attached to the support portion 3a. A first optical fiber cable C1 and a second optical fiber cable C2 are introduced into the closure main body 3.

(Direction definition)
In this embodiment, the positional relationship of each configuration will be described using the XYZ Cartesian coordinate system. The direction along the Z axis is called the vertical direction Z, the direction along the Y axis is called the horizontal direction Y, and the direction along the X axis is called the front-back direction X. The + Z side is called upward, the -Z side is called downward, the + X side is called forward, the -X side is called rear, the -Y side is called right, and the + Y side is called left. Viewing from above is called plan view.

The first optical fiber cable C1 has a plurality of first optical fiber units U1, and the second optical fiber cable C2 has a plurality of second optical fiber units U2. The closure 1 is configured to accommodate the connection portion of the first optical fiber unit U1 and the second optical fiber unit U2. Further, each optical fiber cable C1 and C2 has sheaths P1 and P2 that cover a plurality of optical fiber units U1 and U2. As shown in FIG. 2, the optical fiber units U1 and U2 are pulled out upward from the ends of the sheaths P1 and P2.

In the example of FIG. 2, the optical fiber cables C1 and C2 have 16 optical fiber units U1 and U2, respectively. The 16 optical fiber units U1 and U2 are introduced in the tray 2, respectively. Therefore, the closure 1 includes 16 trays 2. The number of optical fiber units U1, U2 and tray 2 can be changed as appropriate.
Although not shown, the closure 1 covers the plurality of trays 2 and the support portion 3a, and has a cover for preventing the intrusion of water and the like. The shape of the cover can be changed as appropriate, but it is, for example, a topped cylinder.

As shown in FIG. 2, the first optical fiber cable C1 and the second optical fiber cable C2 are arranged side by side in the left-right direction Y below the closure main body 3. The optical fiber cables C1 and C2 extend in the vertical direction Z below the closure body 3. Further, the upper ends of the sheaths P1 and P2 are introduced above the closure body 3.
The support portion 3a extends along the vertical direction Z. The support portion 3a has a plurality of attachment / detachment mechanisms (not shown) arranged side by side in the vertical direction Z. Each attachment / detachment mechanism is configured to detachably support the attachment portion 13 (see FIG. 4A) included in each tray 2.

As shown in FIG. 3, the tray 2 has a tray main body 10, an inner lid 20, and an upper lid 30. The tray main body 10, the inner lid 20, and the upper lid 30 are arranged side by side in this order from the bottom. The inner lid 20 is rotatably connected to the tray main body 10 around the first hinge H1. The upper lid 30 is rotatably connected to the inner lid 20 around the second hinge H2. The first hinge H1 and the second hinge H2 are provided at the front end of the tray 2. The second hinge H2 is arranged above the first hinge H1.

FIG. 4A shows the tray 2 with the inner lid 20 and the upper lid 30 closed. FIG. 4B shows the tray 2 in a state where only the upper lid 30 is opened. FIG. 4C shows the tray 2 with both the inner lid 20 and the upper lid 30 open. The tray 2 can be displaced to each posture shown in FIGS. 4A to 4C by rotating the inner lid 20 or the upper lid 30 around the first hinge H1 and the second hinge H2.
In the following description, unless otherwise specified, the positional relationship of each configuration in the state where the inner lid 20 and the upper lid 30 are closed (FIG. 4A) will be described.

As shown in FIG. 4A, the tray 2 has a first opening O1 and a second opening O2. The first opening O1 and the second opening O2 are formed at intervals in the left-right direction Y. The first opening O1 is open so as to face rearward and left, and the second opening O2 is open so as to face rearward and right. The openings O1 and O2 are used to introduce the optical fiber units U1 and U2 into the tray 2.

As shown in FIG. 4A, the upper lid 30 has a plate-shaped upper plate portion 31. The upper plate portion 31 extends along the left-right direction Y and the front-rear direction X. The upper plate portion 31 is located at the upper end portion of the tray 2. The upper plate portion 31 is formed with two first notched portions 31a and one second notched portion 31b. The

cutouts

31a and 31b are formed in a substantially triangular shape with rounded tips in a plan view. The two first notch portions 31a extend inward in the left-right direction Y from the right end portion and the left end portion of the upper plate portion 31. The second notch portion 31b extends rearward from the front end portion of the upper plate portion 31. The upper plate portion 31 is formed in a symmetrical shape.

Two second hinge protrusions 32 are formed on the upper lid 30. The two second hinge protrusions 32 project forward from the front end of the upper plate portion 31 and are arranged at intervals in the left-right direction Y. A second rotation shaft 32a is formed on each of the second hinge protrusions 32. The second rotation shaft 32a projects outward from the side surface of each of the second hinge protrusions 32 in the left-right direction Y. The second rotating shaft 32a constitutes the second hinge H2 together with the second bearing portion 27 described later.

As shown in FIG. 4B, the upper lid 30 is formed with a recess 33 and a locking piece 33a. The recess 33 is recessed from the rear end portion of the upper plate portion 31 toward the front. The locking piece 33a projects downward from the front edge of the recess 33. A protrusion protruding rearward is formed at the lower end of the locking piece 33a, and the protrusion is locked in the locking hole 23a (see FIG. 4C) of the inner lid 20 so that the upper lid 30 is inside. The closed state is maintained with respect to the lid 20.

Further, a long hole 34 is formed in the upper plate portion 31 (see FIG. 4A). The elongated hole 34 penetrates the upper plate portion 31 in the vertical direction Z and extends along the horizontal direction Y. The elongated hole 34 is adjacent to the recess 33 and is located in front of the recess 33. By bending the locking piece 33a forward using the elongated hole 34, the locking piece 33a can be released from the locking hole 23a. As a result, the upper lid 30 is in a state where it can rotate around the second hinge H2 with respect to the inner lid 20.

As shown in FIG. 4B, the inner lid 20 has a middle plate portion 21, an intermediate peripheral wall 22, and a locking portion 23. The middle plate portion 21 is formed in a plate shape extending along the left-right direction Y and the front-rear direction X. The middle plate portion 21 is located below the upper plate portion 31 and faces the upper plate portion 31 in the vertical direction Z. The intermediate peripheral wall 22 extends upward from the outer peripheral edge of the middle plate portion 21. The space surrounded by the middle plate portion 21, the intermediate peripheral wall 22, and the upper plate portion 31 is referred to as a second accommodating portion S2 (described later).

The middle plate portion 21 is formed with two first notch portions 21a, one second notch portion 21b, and two third notch portions 21c. The cutout portions 21a to 21c are formed in a substantially triangular shape with a rounded tip in a plan view. The two first notch portions 21a extend inward in the left-right direction Y from the right end portion and the left end portion of the middle plate portion 21. The second cutout portion 21b extends rearward from the front end portion of the middle plate portion 21. The two third notch portions 21c extend from the portion between the first notch portion 21a and the second notch portion 21b on the outer peripheral edge of the middle plate portion 21 toward the central portion of the middle plate portion 21.

Further, two intermediate openings 21d are formed in the middle plate portion 21. The two intermediate openings 21d are provided at the rear end of the middle plate portion 21 and are arranged at intervals in the left-right direction Y. The space located below the middle plate portion 21 and the space located above the middle plate portion 21 are connected to each other inside the tray 2 by these two intermediate openings 21d. The middle plate portion 21 is formed in a symmetrical shape.

The intermediate peripheral wall 22 is formed on the outer peripheral edge of the middle plate portion 21 in front of the intermediate opening 21d. In other words, the intermediate peripheral wall 22 is not formed in a portion behind the intermediate opening 21d. It can also be said that the intermediate peripheral wall 22 is formed in a C shape that opens rearward in a plan view. As described above, since the intermediate peripheral wall 22 is not formed over the entire circumference of the middle plate portion 21, the first opening O1 and the second opening O2 shown in FIG. 4A are formed. The intermediate peripheral wall 22 has two intermediate side wall portions 22a and an intermediate front wall portion 22b.

The two intermediate side wall portions 22a are formed so as to face Y in the left-right direction. The intermediate front wall portion 22b is formed so as to face the front-rear direction X. At the upper end of each intermediate side wall portion 22a, a first pressing portion 25A is formed so as to project toward the center of the middle plate portion 21. The first holding portion 25A has substantially the same shape as the first notched portion 21a of the inner lid 20 and the first notched portion 31a of the upper lid 30, and is provided at a position overlapping the first notched

portions

21a and 31a in a plan view. Has been done. At the upper end of the intermediate front wall portion 22b, a second pressing portion 25B is formed so as to project toward the center of the middle plate portion 21. The second pressing portion 25B has substantially the same shape as the second notched portion 21b of the inner lid 20 and the second notched portion 31b of the upper lid 30, and is provided at a position overlapping the second notched

portions

21b and 31b in a plan view. Has been done.

As shown in FIG. 4A, when the upper lid 30 is closed with respect to the inner lid 20, the

pressing portions

25A and 25B are inserted inside the

notches

31a and 31b, respectively. The

pressing portions

25A and 25B suppress the lifting of the optical fiber units U1 and U2 when the optical fiber units U1 and U2 are accommodated in the second accommodating portion S2.

Two second bearing portions 27 (see FIG. 3) are formed on the inner lid 20. The two second bearing portions 27 project forward from the intermediate front wall portion 22b, and are arranged at intervals in the left-right direction Y. Each second bearing portion 27 is formed with a shaft hole that rotatably supports the second rotating shaft 32a of the upper lid 30. In this way, the second rotating shaft 32a is supported by the second bearing portion 27, so that the upper lid 30 can rotate with respect to the inner lid 20.

Two first hinge protrusions 26 are formed on the inner lid 20 (see FIG. 3). The two first hinge protrusions 26 project forward from the intermediate front wall portion 22b and are arranged at intervals in the left-right direction Y. A first rotation shaft 26a is formed on each first hinge protrusion 26. The first rotation shaft 26a projects outward from the side surface of each first hinge protrusion 26 in the left-right direction Y. The first rotating shaft 26a constitutes the first hinge H1 together with the first bearing portion 16 described later.

As shown in FIG. 4B, the middle plate portion 21 is formed with a raised portion 24 that is raised upward. The raised portion 24 is located at the center of the middle plate portion 21 in the left-right direction Y. A gap is provided between the raised portion 24 and the intermediate peripheral wall 22, and the notch portions 21a to 21c described above are arranged in this gap. A partition portion 24a projecting upward is formed on the upper surface of the raised portion 24.

The partition portion 24a is formed in a plate shape extending along the front-rear direction X and the vertical direction Z. The partition portion 24a is formed in a substantially rectangular shape in which the dimension in the vertical direction Z is smaller than the dimension in the front-rear direction X when viewed from the left-right direction Y. The space between the inner lid 20 and the upper lid 30 (second accommodating portion S2) is divided into a first region A1 and a second region A2 by the partition portion 24a. The first region A1 is located to the left of the partition 24a, and the second region A2 is located to the right of the partition 24a. That is, the first region A1 and the second region A2 are arranged side by side in the left-right direction Y.

The locking portion 23 extends upward from the rear end portion of the middle plate portion 21. The locking portion 23 is sandwiched by two intermediate openings 21d in the left-right direction Y. As shown in FIG. 4C, a locking hole 23a is formed in the locking portion 23. The locking hole 23a penetrates the locking portion 23 in the front-rear direction X. The locking hole 23a extends upward from the lower end of the locking portion 23, but does not reach the upper end of the locking portion 23. When viewed from the front-rear direction X, the locking hole 23a is formed in a rectangular shape. When the upper lid 30 is closed with respect to the inner lid 20, the locking piece 33a is locked in the locking hole 23a.

As shown in FIG. 4C, the tray main body portion 10 has a bottom plate portion 11, a lower peripheral wall 12, and a mounting portion 13. The bottom plate portion 11 is formed in a plate shape extending along the left-right direction Y and the front-rear direction X. The bottom plate portion 11 is located below the middle plate portion 21 and faces the middle plate portion 21 in the vertical direction Z. The lower peripheral wall 12 extends upward from the outer peripheral edge of the bottom plate portion 11. The space surrounded by the bottom plate portion 11, the lower peripheral wall 12, and the middle plate portion 21 is referred to as a first accommodating portion S1 (described later).

The bottom plate portion 11 is formed with two first notch portions 11a, one second notch portion 11b, and two third notch portions 11c. The cutout portions 11a to 11c are formed in a substantially triangular shape with a rounded tip in a plan view. The two first notch portions 11a extend inward in the left-right direction Y from the right end portion and the left end portion of the bottom plate portion 11. The second notch portion 11b extends rearward from the front end portion of the bottom plate portion 11. The two third notches 11c extend from a portion between the first notch 11a and the second notch 11b on the outer peripheral edge of the bottom plate 11 toward the center of the bottom plate 11. The bottom plate portion 11 is formed in a symmetrical shape.

The lower peripheral wall 12 has two rear side wall portions 12a, two front side wall portions 12b, a rear wall portion 12c, and a front wall portion 12d. The rear side wall portion 12a and the rear wall portion 12c have larger dimensions in the vertical direction Z than the front side wall portion 12b and the front wall portion 12d. The rear side wall portion 12a and the front side wall portion 12b are formed so as to face the left-right direction Y. The rear wall portion 12c and the front wall portion 12d are formed so as to face the front-rear direction X.

A first pressing portion 15A protruding toward the center of the bottom plate portion 11 is formed at the upper end portion of each front side wall portion 12b. The first holding portion 15A has substantially the same shape as the first notch portion 11a of the tray main body portion 10 and the first notch portion 21a of the inner lid 20, and is positioned so as to overlap the

first notch portions

11a and 21a in a plan view. It is provided in. A second pressing portion 15B is formed at the upper end portion of the front wall portion 12d so as to project toward the center of the bottom plate portion 11. The second pressing portion 15B has substantially the same shape as the second notched portion 11b of the tray main body portion 10 and the second notched portion 21b of the inner lid 20, and is positioned so as to overlap the second notched

portions

11b and 21b in a plan view. It is provided in.

A third pressing portion 15C protruding toward the center of the bottom plate portion 11 is formed in a portion of the upper end portion of the front side wall portion 12b located in front of the first pressing portion 15A. The third holding portion 15C has substantially the same shape as the third cutout portion 11c of the tray main body portion 10 and the third cutout portion 21c of the inner lid 20, and is positioned so as to overlap the

third cutout portions

11c and 21c in a plan view. It is provided in.

Two first bearing portions 16 (see FIG. 3) are formed in the tray main body portion 10. The two first bearing portions 16 project forward from the front wall portion 12d and are arranged at intervals in the left-right direction Y. Each first bearing portion 16 is formed with a shaft hole that rotatably supports the first rotating shaft 26a of the inner lid 20. In this way, the first rotating shaft 26a is supported by the first bearing portion 16, so that the inner lid 20 can rotate with respect to the tray main body portion 10.

As shown in FIG. 4C, a protective region 14 is provided at the central portion of the bottom plate portion 11 in the left-right direction Y. The protective region 14 is composed of a plurality of protective plates 14a arranged side by side in the front-rear direction X. Each protective plate 14a is formed in a plate shape extending along the horizontal direction Y and the vertical direction Z. A recess that is recessed downward is formed in the central portion of each protective plate 14a in the left-right direction Y. The recess is used, for example, when pinching the optical fiber F (see FIG. 5A) arranged between the protective plates 14a. A fusion splicing portion of two optical fibers F is arranged between the protective plates 14a. This protects the fusion splicer. When the inner lid 20 is closed with respect to the tray main body 10, the protected area 14 is covered from above by the lower surface of the raised portion 24.

Three bundle holding portions 17 are formed behind the protected area 14. Each bundle holding portion 17 extends upward from the bottom plate portion 11 and is arranged at intervals in the front-rear direction X. The gap between the handle holding plates 17 is used to hold the bundle portion (described later) of the optical fiber units U1 and U2.

The mounting portion 13 is provided at the central portion of the rear wall portion 12c in the left-right direction Y, and protrudes upward from the rear wall portion 12c. The mounting portion 13 is formed in a tubular shape extending along the vertical direction Z, and has a hollow shape. In the present embodiment, the mounting portion 13 is formed in a trapezoidal shape protruding rearward from the rear wall portion 12c in a plan view. The shape of the mounting portion 13 can be changed as appropriate. A mounting hole 13a is formed on the rear end surface of the mounting portion 13. The tray 2 is mounted on the support portion 3a by inserting the attachment / detachment mechanism (not shown) of the support portion 3a into the mounting hole 13a.

Next, a procedure for accommodating the connection portions of the first optical fiber unit U1 and the second optical fiber unit U2 in the tray 2 configured as described above will be described. As shown in FIGS. 5A to 5C, each optical fiber unit U1 and U2 has a plurality of optical fibers F and a bundle material B for bundling the plurality of optical fibers F. The bundle material B of the present embodiment has a mesh shape, but the shape of the bundle material B can be changed as appropriate.

In order to accommodate the connection portion between the first optical fiber unit U1 and the second optical fiber unit U2 in the tray 2, first, any tray 2 attached to the support portion 3a is removed from the support portion 3a. Specifically, the attachment / detachment mechanism of the support portion 3a is operated to remove the attachment / detachment mechanism from the attachment hole 13a. When a plurality of people perform work of accommodating the optical fiber units U1 and U2 in a plurality of trays 2 at the same time, the subsequent work is performed by placing each tray 2 at a position away from the support portion 3a. It will be easier.

Next, as shown in FIG. 5A, the inner lid 20 is set to be open with respect to the tray main body 10. Next, the bundle material B of the optical fiber units U1 and U2 is partially removed to release the binding of the plurality of optical fibers F. Next, the optical fibers F of the optical fiber units U1 and U2 are fused and connected to each other by using a fusion splicer or the like. Then, each optical fiber F is set in the protective region 14 so that the fusion splicing portion is located between the protective plates 14a. Further, of the optical fiber units U1 and U2, a portion bound by the bundle material B (hereinafter, simply referred to as a “bundle portion”) is set between the bundle holding portions 17. The portion where the first optical fiber unit U1 is bound by the bundle material B is referred to as the first bundle portion, and the portion where the second optical fiber unit U2 is bound by the bundle material B is referred to as the second bundle portion.

In FIG. 5A, since the extra length of the optical fiber F is short, the optical fiber F is directly directed from the bundle holding portion 17 to the protected area 14. When the extra length of the optical fiber F is long, the extra length portion of the optical fiber F may be absorbed in the first accommodating portion S1 so that the bundle of the optical fiber F orbits around the protection region 14. The holding portions 15A to 15C formed in the tray main body portion 10 can suppress the lifting of the optical fiber F housed in the first accommodating portion S1.

Next, as shown in FIG. 5B, the inner lid 20 is closed with respect to the tray main body 10. At this time, the optical fiber units U1 and U2 can be pulled out upward from the first accommodating portion S1 through the two intermediate openings 21d of the inner lid 20.
Next, as shown in FIG. 5C, the upper lid 30 is closed with respect to the inner lid 20. At this time, the first optical fiber unit U1 is pulled out from the first opening O1 to the outside of the tray 2, and the second optical fiber unit U2 is pulled out from the second opening O2 to the outside of the tray 2.

Then, the tray 2 is mounted at a predetermined position on the support portion 3a. Here, the farther the place where the fusion splicing work is performed from the support portion 3a, the larger the extra length of the optical fiber units U1 and U2 becomes when the tray 2 is attached to the support portion 3a. In the present embodiment, the extra length portions of the optical fiber units U1 and U2 can be accommodated in the second accommodating portion S2 through the first opening O1 and the second opening O2.

For example, as shown in FIG. 5C, the optical fiber units U1 and U2 are spirally wound outside the tray 2, and the wound portions are pushed into the tray 2 through the openings O1 and O2. Then, the extra length portion of the first optical fiber unit U1 is accommodated in the first region A1 (see FIG. 5B), and the extra length portion of the second optical fiber unit U2 is accommodated in the second region A2. By such a procedure, even if the extra lengths of the optical fiber units U1 and U2 are large, the extra length portions can be easily accommodated in the tray 2.

The wider the widths of the openings O1 and O2, the smoother the extra length portions of the optical fiber units U1 and U2 can be pushed in from the openings O1 and O2. In the present embodiment, the width of the openings O1 and O2 in the left-right direction Y and the width in the front-rear direction X are more than twice the diameter of the optical fiber units U1 and U2, and workability when accommodating the extra length portion is achieved. Is good. Further, for example, the width of the openings O1 and O2 in the vertical direction Z may be twice or more the diameter of the optical fiber units U1 and U2.

As described above, the closure 1 of the present embodiment includes a plurality of trays 2 and a support portion 3a for detachably supporting the plurality of trays 2, and a plurality of first optical fiber cables C1 included in the first optical fiber cable C1. 1 Holds a connection portion of a plurality of second optical fiber units U2 included in the optical fiber unit U1 and the second optical fiber cable C2. Each of the plurality of trays 2 has a first accommodating portion S1 and a second accommodating portion S2. The first accommodating portion S1 accommodates a fusion splicing portion between the optical fiber F included in the first optical fiber unit U1 and the optical fiber F included in the second optical fiber unit U2. The second accommodating portion S2 accommodates a first bundle portion in which the first optical fiber unit U1 is bundled with the bundle material B, and a second bundle portion in which the second optical fiber unit U2 is bundled with the bundle material B. ..

Since the plurality of trays 2 are detachably supported by the support portion 3a in this way, if these trays 2 are removed from the support portion 3a, a plurality of people can simultaneously perform the connection work. Then, in addition to the first accommodating portion S1 accommodating the fusion splicing portion, each tray 2 is formed with a second accommodating portion S2 accommodating the bundle portion. Therefore, even if the extra lengths of the respective optical fiber units U1 and U2 are long, the extra length portion can be accommodated in the second accommodating portion S2, and for example, it is possible to prevent the extra length portion from being entangled in the closure 1. it can. Therefore, according to the closure 1 of the present embodiment, it is possible for a plurality of people to easily perform the connection work at the same time, and the connection work can be performed more efficiently. In particular, even when the number of optical fibers F included in the optical fiber cables C1 and C2 exceeds 1000, the connection work can be performed in a shorter time than before.

Further, in the second accommodating portion S2, the partition portion 24a accommodates the first region A1 in which the first bundle portion of the first optical fiber unit U1 is accommodated and the second bundle portion of the second optical fiber unit U2. It is divided into a second area A2. With this configuration, it is possible to prevent the extra length portion of the first optical fiber unit U1 and the extra length portion of the second optical fiber unit U2 from being entangled in the second accommodating portion S2. Therefore, the connection work can be performed more efficiently.

Further, the closure 1 of the present embodiment includes a plurality of trays 2 and a support portion 3a for detachably supporting the plurality of trays 2, and a plurality of first optical fiber units included in the first optical fiber cable C1. It holds the connection portions of a plurality of second optical fiber units U2 included in the U1 and the second optical fiber cable C2. Each of the plurality of trays 2 has a tray main body 10, an inner lid 20, and an upper lid 30, and an optical fiber F and a first optical fiber F included in the first optical fiber unit U1 are located between the tray main body 10 and the inner lid 20. The first accommodating portion S1 in which the fusion splicing portion with the optical fiber F included in the two optical fiber unit U2 is accommodated is formed. Then, between the inner lid 20 and the upper lid 30, the first bundle portion in which the first optical fiber unit U1 is bound by the bundle material B and the second bundle in which the second optical fiber unit U2 is bundled by the bundle material B are bundled. A second accommodating portion S2 for accommodating the portion and the portion is formed.

Further, each of the plurality of trays 2 has a first opening O1 into which the first optical fiber unit U1 is introduced and a second opening O2 into which the second optical fiber unit U2 is introduced, and the first opening. The width of the portion O1 is larger than twice the diameter of the first optical fiber unit U1, and the width of the second opening O2 is larger than twice the diameter of the second optical fiber unit U2. With this configuration, after the connection work is performed, the extra length portions of the optical fiber units U1 and U2 can be smoothly pushed into the second accommodating portion S2 through the openings O1 and O2. In this way, since the extra length portions of the optical fiber units U1 and U2 can be accommodated in the second accommodating portion S2 without opening the upper lid 30, the connection work can be performed more efficiently.

Further, the first region A1 and the second region A2 are arranged side by side in the left-right direction Y. As a result, the first region A1 and the second region A2 can be provided between the inner lid 20 and the upper lid 30 with a simple configuration.

Further, the inner lid 20 is rotatably connected to the tray main body 10 around the first hinge H1, and the upper lid 30 is rotatably connected to the inner lid 20 around the second hinge H2. By adopting such a double lid structure, the first accommodating portion S1 and the second accommodating portion S2 can be partitioned by a simple configuration.

Further, the first opening O1 and the second opening O2 are open toward the rear, and the support portion 3a is located behind the tray 2. That is, the first opening O1 and the second opening O2 are open toward the support portion 3a. With this configuration, as shown in FIG. 2, the optical fiber units U1 and U2 can be compactly arranged along the support portion 3a.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above-described embodiment, the first region A1 and the second region A2 are arranged side by side in the left-right direction Y, but the first region A1 and the second region A2 may be arranged side by side in the front-rear direction X. Such a configuration can be realized by forming the partition portion 24a in a plate shape extending in the left-right direction Y. Also in this case, the first region A1 and the second region A2 can be provided between the inner lid 20 and the upper lid 30 with a simple configuration. That is, the first region A1 and the second region A2 may be arranged side by side in the left-right direction Y or the front-rear direction X.

Alternatively, the first region A1 and the second region A2 may be arranged side by side in the vertical direction Z. Such a configuration can be realized, for example, by providing a plate-shaped partition portion extending along both the front-rear direction X and the left-right direction Y between the inner lid 20 and the upper lid 30.
The positions of the openings O1 and O2 may be appropriately changed depending on how the areas A1 and A2 are partitioned. For example, when the first region A1 is located in the front and the second region A2 is located in the rear, the first opening O1 may be positioned in the front and the second opening O2 may be located in the rear. As a result, the optical fiber units U1 and U2 can be smoothly accommodated in the respective regions A1 and A2 through the respective openings O1 and O2.

Further, in the above embodiment, the width of the first opening O1 is larger than twice the diameter of the first optical fiber unit U1, and the width of the second opening O2 is larger than twice the diameter of the second optical fiber unit U2. I explained. However, the size of the openings O1 and O2 may be a size that allows the optical fiber units U1 and U2 to pass through. Specifically, if the diameter of the inscribed circle of the openings O1 and O2 is larger than the diameter of the optical fiber units U1 and U2, the optical fiber units U1 and U2 can be passed through the openings O1 and O2.

Further, in the above-described embodiment, the extra length portions of the optical fiber units U1 and U2 are accommodated in the second accommodating portion S2 through the openings O1 and O2. However, for example, the upper lid 30 may be opened, the extra length portion may be placed on the inner lid 20, and then the upper lid 30 may be closed. Even in this case, the extra length portion can be accommodated in the second accommodating portion S2.

Further, in the above-described embodiment, the tray main body 10, the inner lid 20, and the upper lid 30 are connected by hinges H1 and H2. However, the tray body 10, the inner lid 20, and the upper lid 30 may not be connected. For example, the inner lid 20 can be attached to and detached from the tray main body 10 by using a locking claw or the like, and the upper lid 30 can be attached to and detached from the inner lid 20.

Further, in the above embodiment, both the first hinge H1 and the second hinge H2 are provided at the front end portion of the tray 2, but the positions of the first hinge H1 and the second hinge H2 may be changed as appropriate. For example, one or both of the first hinge H1 and the second hinge H2 may be provided at the rear end, the left end, or the right end of the tray 2.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention, and the above-described embodiments and modifications may be appropriately combined.

1 ... Closure 2 ... Tray 3a ... Support 10 ... Tray body 20 ... Inner lid 24a ... Partition 30 ... Top lid C1 ... 1st optical fiber cable C2 ... 2nd optical fiber cable H1 ... 1st hinge H2 ... 2nd hinge O1 ... 1st opening O2 ... 2nd opening S1 ... 1st accommodating unit S2 ... 2nd accommodating unit U1 ... 1st optical fiber unit U2 ... 2nd optical fiber unit

Claims

A closure that holds the connection portions of a plurality of first optical fiber units included in the first optical fiber cable and a plurality of second optical fiber units included in the second optical fiber cable.
With multiple trays
A support portion for detachably supporting the plurality of trays is provided.
Each of the plurality of trays
A first accommodating portion accommodating a fusion splicing portion between an optical fiber included in the first optical fiber unit and an optical fiber included in the second optical fiber unit, and
It has a first bundling portion in which the first optical fiber unit is bundled with a bundle material, and a second accommodating portion for accommodating a second bundling portion in which the second optical fiber unit is bound with a bundling material. ,
The second accommodating portion is divided into a first region in which the first bundle portion is accommodated and a second region in which the second bundle portion is accommodated by a partition portion.
Each of the plurality of trays has a first opening into which the first optical fiber unit is introduced and a second opening into which the second optical fiber unit is introduced.
The width of the first opening is larger than twice the diameter of the first optical fiber unit.
The closure according to claim 1, wherein the width of the second opening is larger than twice the diameter of the second optical fiber unit.
The closure according to claim 1 or 2, wherein the first region and the second region are arranged side by side in the left-right direction or the front-rear direction.
The closure according to any one of claims 1 to 3, wherein each of the plurality of trays has a tray main body, an inner lid, and an upper lid.
The inner lid is rotatably connected to the tray body around the first hinge.
The closure according to claim 4, wherein the upper lid is rotatably connected to the inner lid around a second hinge.
A closure that holds the connection portions of a plurality of first optical fiber units included in the first optical fiber cable and a plurality of second optical fiber units included in the second optical fiber cable.
With multiple trays
A support portion for detachably supporting the plurality of trays is provided.
Each of the plurality of trays has a tray body, an inner lid, and an upper lid.
Between the tray main body and the inner lid, a first accommodating portion accommodating a fusion splicing portion between the optical fiber contained in the first optical fiber unit and the optical fiber contained in the second optical fiber unit is provided. Formed,
Between the inner lid and the upper lid, a first bundle portion in which the first optical fiber unit is bundled with a bundle material and a second bundle portion in which the second optical fiber unit is bundled with a bundle material are provided. A closure in which a second containment section is formed.
The second accommodating portion according to claim 6, wherein the second accommodating portion is divided into a first region in which the first bundle portion is accommodated and a second region in which the second bundle portion is accommodated by a partition portion. closure.
Each of the plurality of trays has a first opening into which the first optical fiber unit is introduced and a second opening into which the second optical fiber unit is introduced.
The width of the first opening is larger than twice the diameter of the first optical fiber unit.
The closure according to claim 6 or 7, wherein the width of the second opening is greater than twice the diameter of the second optical fiber unit.
The closure according to claim 7, wherein the first region and the second region are arranged side by side in the left-right direction or the front-rear direction.
The inner lid is rotatably connected to the tray body around the first hinge.
The closure according to any one of claims 6 to 9, wherein the upper lid is rotatably connected to the inner lid around a second hinge.