JP2001356217A - Line terminating tray for optical fiber cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a line terminating tray for an optical fiber cable which terminates a line side coated optical fiber tape incorporated in a line side optical fiber cable with high density, which is small and lightweight and the increased number of which is stored in a wiring board and moreover which is easy in terminating work. SOLUTION: The tray is composed of a main body tray, an inside lid and an upper lid and is formed in a thin casing shape. An optical connector/adapter 14, which is capable of connecting an optical connector 3A attached to an indoor device side optical fiber cord 3, is attached to the main body tray. A connector tray part, which stores one end side of the coated optical fiber tape 4 having a single end optical connector connected to the optical connector/ adapter 14, is formed between the main body tray and the inside lid. A drawing- out port for the coated optical fiber tape 4 is formed in the inside lid. A fusion tray part, which stores the other end side of the coated optical fiber tape 4 fusion spliced to a line side coated optical fiber tape 1, is formed between the inside lid and the upper lid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel optical fiber for terminating a line-side optical fiber ribbon contained in a line-side optical fiber cable of an optical fiber distribution network so as to be connectable to a device-side optical fiber cord. The present invention relates to a cable termination tray.

[0002]

2. Description of the Related Art In an optical fiber wiring network, to terminate a line-side optical fiber ribbon contained in an outdoor line-side optical fiber cable of a building or the like so as to be connectable to an indoor apparatus-side optical fiber cord. , FO code has been conventionally used in general. This FO
The cord has a function of converting the line-side optical fiber ribbon into a single-core cord, and a plurality of single-core cords are attached to the multi-core tape cord fused to the line-side optical fiber ribbon. It is configured to be connected in advance. The tape cord is configured by covering a multi-core tape core with an aramid fiber and a sheath, and an optical connector plug connected to the device-side optical fiber cord is attached to an end of each of the single-core cords. ing.

The vicinity of the fusion splicing portion between the line-side optical fiber ribbon and the FO cord is accommodated in a fusion tray with an extra length processed, and an optical connector connection between the apparatus-side optical fiber cord and the FO cord is provided. The vicinity of the section is accommodated in the connector tray after being processed for extra length. In this case, a plurality of FO cords are collectively accommodated in a fusion tray and a connector tray, and a large number of these fusion trays and connector trays are accommodated in an optical fiber cable distribution board installed in a building or the like. .

[0004]

When the number of optical fibers is, for example, four, the FO cord has a tape cord width of 3.5 mm, a thickness of 2.5 mm, and a diameter of each single core cord. Is 2 mm, and a single-core optical connector adapter is connected to each of the four optical connector plugs at the ends thereof. That is, in the FO cord, the thickness and width of the tape cord portion are large, each single-core cord portion is thick, and each optical connector plug including each optical connector adapter is large. It cannot be accommodated after being processed for an extra length, and the fusion tray and the connector tray are enlarged. Further, as described above, since the FO cord having a large volume has a large weight, the fusion tray and the connector tray need to be made of a metal having high rigidity, and the fusion tray and the connector tray become heavy.

That is, when terminating the optical fiber ribbon on the line side using the FO cord, a large and heavy fusion tray and connector tray are required. In an optical fiber cable distribution box, the number of optical fibers that can connect an outdoor line-side optical fiber ribbon to an indoor device-side optical fiber cord is limited to about 1,000, so that high density cannot be expected. There is a problem.

In a conventional termination operation using a FO cord, a line-side optical fiber cable is fixed to a line-side optical fiber cable introduction space of an optical fiber cable distribution board, and the fixed line-side optical fiber cable is fixed. After the line-side optical fiber ribbon pulled out of the cable is fusion-spliced to the tape code portion of the FO cord, these portions are wound in a loop on a fusion tray and processed for extra length. At this time, a twist occurs in the line side optical fiber tape core wire and the tape cord portion of the FO cord. For this reason, the extra length processing is troublesome, and the accommodation of the line side optical fiber tape core and the tape cord portion of the FO cord in the fusion tray is likely to be messy, so that there is a problem that the termination work is troublesome.

Accordingly, the present invention is capable of terminating a line-side optical fiber tape core wire contained in a line-side optical fiber cable at a high density, being small and lightweight, and reducing the number of cables accommodated in an optical fiber cable distribution board. It is an object of the present invention to provide a line termination tray for an optical fiber cable which can be increased and whose termination operation is easy.

[0008]

In order to solve the above-mentioned problems, a line termination tray of an optical fiber cable according to the present invention comprises a line-side optical fiber tape included in a line-side optical fiber cable of an optical fiber distribution network. A line termination tray for terminating a core so that it can be connected to an optical fiber cord on the device side via an optical fiber ribbon with a single-end optical connector. An optical connector adapter capable of connecting an optical connector attached to the device-side optical fiber cord is mounted on the main body tray, and the optical connector adapter is provided between the main body tray and the inner lid. A connector tray portion is formed for accommodating one end of the optical fiber ribbon with a single-ended optical connector to be connected, and the light having a single-ended optical connector is formed on the inner lid. An outlet for a fiber ribbon is formed, and between the inner lid and the upper lid, the light with a one-end optical connector that is fusion-spliced to the line-side optical fiber ribbon included in the line-side optical fiber cable. A fusion tray for accommodating the other end of the fiber ribbon is formed.

[0009] The line termination tray of the present invention is generally used in a fiber optic cable distribution board installed in a building or the like to connect a line side optical fiber tape core included in an outdoor line side optical fiber cable to an indoor apparatus. It is used for termination processing so that it can be connected to the side optical fiber cord. In the termination process, as a first step, an optical connector at one end of the optical fiber ribbon is connected to an optical connector adapter mounted on the main tray, and one end of the optical fiber ribbon is connected to the main tray. Process the extra length above. Then, pull out the other end of the optical fiber ribbon with the one-end optical connector from the outlet of the inner lid, overlap the inner lid on the main body tray, and connect the other end of the optical fiber ribbon with the one-end optical connector. Store in the connector tray. Note that the first-stage operation up to this point may be performed in advance in a line termination tray production factory, and in that case, the on-site operation of termination processing in the optical fiber cable distribution board is reduced.

[0010] Next, as a second step, the other end of the optical fiber ribbon with the one-end optical connector pulled out from the outlet of the inner lid is connected to the line-side optical fiber tape core included in the line-side optical fiber cable. The other end of the optical fiber tape with a single-end optical connector is processed on the inner lid together with the end of the line-side optical fiber tape. Then, the upper lid is overlaid on the inner lid, and the other end of the optical fiber ribbon with the one-end optical connector and the end of the line-side optical fiber ribbon are accommodated in the fusion tray portion, so that the line-side optical fiber cable is Is completed.
The line termination trays according to the present invention, which have been subjected to the termination processing in this manner, are usually housed in a plurality of termination units provided in the optical fiber cable distribution board, respectively.
Then, the optical connector of the device-side optical fiber cord is connected to the optical connector adapter mounted on each main body tray, thereby connecting the line-side optical fiber tape to the device-side optical fiber cord.

[0011] In the line termination tray of the present invention, when the reel portion for winding the optical fiber tape with the one-end optical connector in a loop shape and processing the extra length is provided on the main body tray and the inner lid, By winding one end of the optical fiber ribbon with one end optical connector around the reel on the main tray and the other end around the reel on the inner lid, the extra length of the optical fiber ribbon can be easily processed. It is preferable because it is possible. In this case, if a rotation center hole corresponding to the reel unit is provided at least in the main body tray and the inner lid, this rotation center hole is inserted into, for example, a shaft formed in a turntable,
By rotating the main body tray around the rotation center hole, one end side of the optical fiber ribbon can be easily wound around the reel portion on the main body tray, and similarly, an inner lid is provided around the rotation center hole. By rotating, the other end of the optical fiber ribbon can be easily wound around the reel on the inner lid, and the excess length processing of the optical fiber ribbon can be performed more easily, which is preferable. .

Further, in the line termination tray of the present invention,
When the inner lid is made of a translucent synthetic resin, it becomes possible to roughly visually recognize the inside of the connector tray section through the inner lid, and while checking the optical fiber ribbon in the connector tray section, It is preferable because the other end of the optical fiber ribbon with the one-end optical connector can be reliably processed on the lid.

Further, in the line termination tray according to the present invention, if the main body tray is provided with a retaining portion for locking one end of the optical fiber ribbon with one end optical connector in the longitudinal direction, When the other end of the optical fiber ribbon with the optical connector is fused to the line side optical fiber ribbon, or the other end of the optical fiber ribbon with the one-end optical connector is looped on the inner lid. This is preferable because, when the wire is wound into a shape and the excess length is processed, an unreasonable tensile force is not applied to one end of the optical fiber ribbon with the one-end optical connector accommodated in the main body tray portion. In addition, if a draw-out guide portion is provided on the inner lid to bend the other end side of the optical fiber ribbon with one end optical connector in an arc shape and to draw out, the line termination tray on which the termination process is completed is provided. When handling, it is preferable because an unreasonable tensile force is not applied to the other end side and the line side optical fiber tape core wire of the optical fiber tape core wire with the one end optical connector accommodated in the fusion tray portion.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a line termination tray of an optical fiber cable according to the present invention will be described with reference to the drawings. In the drawings to be referred to, FIG. 1 is a diagram for explaining the function of a line termination tray according to one embodiment, FIG. 2 is a front view of the line termination tray according to one embodiment, and FIG. 3 is a diagram of the line termination tray shown in FIG. FIG. 4 is a view from the arrow IV of the line termination tray shown in FIG. 2, and FIG. 4 is a view from the arrow V of the line termination tray shown in FIG.

As shown in FIG. 1, a line termination tray 10 according to one embodiment includes a line-side optical fiber tape core wire 1 contained in an outdoor line-side optical fiber cable 1A of an optical fiber distribution network. It has a function of performing termination processing so that it can be connected to the device-side optical fiber cord 3 via an optical fiber ribbon 4 with a single-end optical connector.

The line-side optical fiber cable 1A accommodates, for example, four line-side optical fiber tape cores 1 in five slots in five slots, and the total number of optical fiber cores is one.
It has a structure of 00 tape slot type cables. Each line-side optical fiber tape core wire 1 has a U
It has a structure in which four thin UV wires 2 having an outer diameter of 250 μm to which a V-curable resin is applied are arranged in a row in a tape shape, and these are further collectively covered with a UV-curable resin. Each U
The V wires 2 can be easily separated from each other.

The optical fiber ribbon 4 with one end optical connector also has the same structure as the line-side optical fiber ribbon 1, and is composed of four similar UV wires 4A. One end is fusion-spliced to each UV strand 2 of the line-side optical fiber ribbon 1 at a point C. An optical connector 4B connected to the optical connector adapter 14 is attached to the other end of the optical fiber ribbon 4 with one end optical connector. Since such an optical fiber ribbon 4 is thinner than a conventional FO cord, high density can be achieved. Therefore, in this embodiment,
Four sets of optical fiber tape cores 4 are used for one line termination tray 10, and the number of cores of the line side optical fiber tape cores 1 that one line termination tray 10 can process is determined. The density is 16 cores.

An optical connector 3A is attached to an end of the optical fiber cord 3 on the device side.
A is connected to the optical connector adapter 14 together with the optical connector 4B. The device side optical fiber cord 3 is
It has a single core cord structure in which a polyaramid fiber is longitudinally added as a reinforcing fiber to a nylon core wire, and further, is coated with PVC. The nylon core wire has a buffer layer around the optical fiber, and a nylon resin coating around the buffer layer.
m.

FIG. 2 shows a line termination tray 10 according to this embodiment.
As shown in FIG. 5 to FIG. 5, it is configured in a thin, substantially rectangular case shape. By the way, the approximate size is 14m thickness
m, length 180 mm, width 207 mm. As shown in FIG. 6, the line termination tray 10 is housed in a box-shaped termination unit 5 having an open front surface so as to be vertically insertable and removable in a front-rear direction. It is detachably screwed to. This track termination tray 10
For example, 26 termination units 5 are accommodated side by side.

The termination unit 5 is made of sheet metal, and a guide curved surface 5A for introducing the line-side optical fiber ribbon 1 is formed at the front end of an upper plate portion by bending downward. I have. A guide groove 5B for introducing the device-side optical fiber cord 3 is formed in the front end of the lower plate of the termination unit 5 in a laterally bent manner. Note that mounting flanges 5C are formed on both left and right ends of the rear plate of the termination unit 5.

As shown in FIG. 7A or FIG. 7B, for example, six termination units 5 are mounted in a vertical optical fiber cable distribution board 6 arranged vertically. Each termination unit 5 is detachably fixed in the optical fiber cable distribution board 6 by the mounting flange 5C.

The optical fiber cable distribution board 6 shown in FIG. 7A has a fixing space 6 for the optical fiber cord 3 on the device side.
A is an overhead wiring type set at the top, a wiring space 6B for the device-side optical fiber cord 3 is set on the front left side, and an introduction space 6C for the line-side optical fiber cable 1A is set on the front right side. A lower storage tray 6D is provided at the lower part. On the other hand, the optical fiber cable distribution board 6 shown in FIG.
Is an underpass wiring type in which a lower fixing space 6A is set at a lower portion, a wiring space 6B of the device-side optical fiber cord 3 is set at the front left side, and an introduction space 6C of the line-side optical fiber cable 1A is set at the front right side. The extra length storage tray 6D is set on the upper part.

Here, the line termination tray 10 of one embodiment
Is formed in a thin case shape by a main body tray 11 shown in FIGS. 8 to 11, a middle lid 12 shown in FIG. 12, and an upper lid 13 shown in FIG. 2
The optical connector adapters 14, 14 are arranged and mounted vertically (see FIGS. 2 and 5). Then, between the main body tray 11 and the inner lid 12, each optical connector 4B is connected to the two optical connector adapters 14, 14.
A connector tray section is formed to accommodate one end of the set of optical fiber tape core wires 4 with extra length processing and accommodates the inner lid 12 and the upper lid 1.
3, a fusion tray portion is formed to accommodate the other end sides of the four sets of optical fiber tape core wires 4 with extra processing.

As shown in FIGS. 8 to 11, the main body tray 11 is formed of a transparent synthetic resin into a substantially square thin tray. Here, FIG.
9, FIG. 9 is a view of the main body tray 11 shown in FIG. 8 in the direction of the arrow IX, FIG. 10 is a view of the main body tray 11 shown in FIG. 8 in the direction of the arrow X, and FIG. FIG. At the front end of the main body tray 11, a pair of upper and lower mounting frames 11 for mounting the two optical connector adapters 14, 14 are provided.
A and 11A are formed. Further, on the main body tray 11, one end side of four sets of optical fiber tape core wires 4 connected to the two optical connector adapters 14 and 14 via the optical connector 4B is wound in a loop shape to perform extra length processing. A reel part 11B is formed.

The reel portion 11B is configured to wind the optical fiber ribbon 4 between the annular inner wall 11C and the surrounding annular outer wall 11D.
In addition, at a plurality of locations on the annular outer wall 11D, pieces 11E for preventing the optical fiber ribbon 4 from falling off are integrally formed.
The reel portion 11 is provided inside the annular inner wall 11C.
A rotation center hole 11F corresponding to B, that is, a rotation center hole 11F that enables the reel portion 11B to rotate together with the main body tray 11 is formed.

A delivery passage 11H is formed between the upper wall 11G of the main body tray 11 and the annular outer wall 11D of the reel portion 11B to send out the four sets of optical fiber ribbons 4 toward the inner lid 12. The feed passage 11H is provided with a retaining portion 11J for locking one end of each of the four sets of optical fiber ribbons 4 in the longitudinal direction.
As shown in FIG. 14, the retaining portion 11J is enlarged.
It is provided with a plurality of projections 11K which lock both ends of two heat-shrinkable tubes 15, 15 which are previously mounted so as to bundle two sets of four optical fiber ribbons 4.

As shown in FIG. 12, the inner lid 12 has a substantially square shape forming a connector tray section between itself and the main body tray 11, and is semi-transparent so that the main body tray 11 side can be roughly visually recognized. Molded with synthetic resin. At the rear edge of the inner cover 12, four sets of optical fiber ribbons 4 sent out from the delivery passage 11H of the main body tray 11 are provided.
Is formed. The inner lid 12 is formed with a reel portion 12B for winding the other ends of the four sets of optical fiber tape cores 4 in a loop shape and processing the remaining length.

The reel portion 12B is configured to wind the optical fiber ribbon 4 between the annular inner wall 12C and the surrounding annular outer wall 12D.
Also, at a plurality of locations of the annular outer wall 12D, pieces 12E for preventing the optical fiber ribbon 4 from being dropped are integrally formed.
The reel portion 12 is provided inside the annular inner wall 12C.
B, that is, a rotation center hole 12F that enables the reel unit 12B to rotate together with the inner lid 12.
Are formed so as to overlap the rotation center hole 11F of the main body tray 11. Further, the annular inner wall 12C and the annular outer wall 12D
In the lower part of the reel portion 12B between the two ends, the other end of the four sets of optical fiber ribbons 4, that is, the portion that is fused and connected to the line-side optical fiber ribbon 1 is held. The book holding groove 12G is formed.

Further, a drawer for aligning the four sets of optical fiber ribbons 4 between the front wall 12H of the inner lid 12 and the annular outer wall 12D of the reel portion 12B and pulling the same to the outside of the line termination tray 10. A passage 12J is formed. The upper end wall 12K of the inner lid 12 continues in the tangential direction of the annular outer wall 12D constituting the opening of the drawing passage 12J, so that the other end of the optical fiber ribbon 4 is attached to the inner lid 12. A draw-out guide portion 12L that is bent and drawn out in an arc shape is formed.

As shown in FIG. 13, the upper lid 13 is formed of a transparent synthetic resin into a substantially square shape forming a fusion tray between the upper lid 13 and the inner lid 12. The upper lid 13 has a rotation center hole 11 of the main body tray 11.
A rotation center hole 13A overlapping the rotation center hole 12F of the inner lid 12 is formed.

The optical connector adapter 14 is provided with two sets of optical fiber ribbons 4-8 at connection ports in the main body tray 11.
The optical connector 4B is configured as an eight-unit type for connecting the optical connectors 4B. The optical connector 4B of the optical fiber ribbon 4 is constituted by an SC simple plug.

Next, an example of using the line termination tray of the optical fiber cable according to the embodiment configured as described above will be described. As shown in FIG. 1, the line termination tray 10 is used in an optical fiber cable distribution board 6 (see FIG. 7) installed in a building or the like, as shown in FIG.
This is used for terminating the line-side optical fiber ribbon 1 contained therein so as to be connectable to the indoor device-side optical fiber cord 3.

In the above termination process, first, the first
As a step work, one end side of the optical fiber ribbon 4 is accommodated in the connector tray portion between the main body tray 11 and the inner lid 12 with extra length processing. Next, as a second-stage operation, the other end of the optical fiber ribbon 4 is accommodated in the fusion tray portion between the inner lid 12 and the upper lid 13 with extra length processing.
It is preferable that the first-stage operation be performed in advance in the production factory of the line termination tray 10 because the number of site operations performed in the optical fiber cable distribution board 6 can be reduced.

In the first stage of operation, first, two sets of optical fiber ribbons 4 are attached to each of the two 8-unit optical connector adapters 14 and 14 mounted on the main body tray 11.
8 optical connectors 4B at one end are connected. And 2
One end of a total of four sets of optical fiber ribbons 4 connected to the optical connector adapters 14 and 14 via the optical connector 4B are connected to the annular inner wall 11C and the annular outer wall 1 of the main body tray 11.
The remaining length is wound around the reel portion 11B in the form of a loop.

At the time of the extra length processing, the optical fiber ribbon 4 is prevented from falling off the reel portion 11B.
Each of the optical fiber ribbons 4
Wrap. This extra length processing operation can be easily performed by rotating the main body tray 11 around the rotation center hole 11F without twisting at one end side of each optical fiber ribbon 4. As shown in FIG. 15, the extra length processing operation can be easily performed on the fusion worktable 5D detachably mounted on the front part of the termination unit 5.

That is, the turntable 16 is fixed on the fusion working table 5D by a magnet or the like provided on the bottom surface thereof, and
By inserting the rotation center hole 11F into the shaft 16A formed in the main body 6, the main body tray 11 can easily rotate the rotation center hole 11F.
Each optical fiber ribbon 4 rotates around the reel 1
Winded to 1B. When the main body tray 11 is rotated in this way, inserting the pin into the hole 16B opened in the head of the shaft 16A prevents the main body tray 11 from coming off the shaft 16A.

Subsequently, the two heat-shrinkable tubes 15, 15 mounted in advance so as to bundle two sets of the optical fiber ribbons 4 are fitted into the retaining portions 11J of the main body tray 11, and both ends thereof are projected. Lock with 11K to prevent removal. Thereafter, the other end of each of the optical fiber tape core wires 4 sent out from the sending passage 11H of the main body tray 11 is inserted through the outlet 12A of the inner cover 12 and pulled out. The other end of the fiber ribbon 4 is accommodated in a connector tray between the main body tray 11 and the inner lid 12.

In the operation of the second stage, first, the inner lid 1
The other end of each optical fiber ribbon 4 pulled out from the second outlet 12A is fusion-spliced to the line-side optical fiber ribbon 1 included in the line-side optical fiber cable 1A. At this time, one end of each of the optical fiber ribbons 4 accommodated in the connector tray is engaged in the longitudinal direction with the heat-shrinkable tube 15 engaged with each of the projections 11K of the retaining portion 11J of the main body tray 11. Therefore, it is possible to prevent an unreasonable tensile force from being applied to one end of each optical fiber ribbon 4.

Subsequently, the other end of each optical fiber ribbon 4 and the end of the line-side optical fiber ribbon 1 are connected to the inner lid 1.
The second reel 12B is wound around the reel portion 12B between the second annular inner wall 12C and the second annular outer wall 12D, and the extra length is processed. At the time of this extra length processing, each optical fiber tape core 4 and line are placed inside each fall-off preventing piece 12E so that each optical fiber tape core 4 and line side optical fiber tape core 1 do not fall off the reel portion 12B. The side optical fiber ribbon 2 is wound. This extra length processing work is performed by turning the inner lid 12
By rotating around F, it can be easily performed without twisting the other end of each optical fiber ribbon 4.

This extra length processing can also be easily performed on the fusion worktable 5D detachably mounted on the front part of the termination unit 5 shown in FIG. On this occasion,
The line-side optical fiber ribbon 1 that is fusion-spliced to each optical fiber ribbon 4 is a line-side optical fiber cable fixed to an introduction space 6C on the right side of the termination unit 5 of the optical fiber cable distribution board 6. It is drawn from 1A. In this way, when the drawn-out portion of the line-side optical fiber ribbon 1 is fixed to the optical fiber cable distribution board 6, the optical fiber ribbon 4 is manually rolled into a loop and circulated to process the excess length. In the case of (2), the twist corresponding to the number of turns occurred in the optical fiber ribbon 4 and entangled with each other. However, in the case of the present embodiment, since the tray is rotated to store the optical fiber ribbon 4 in the tray,
No twisting or entanglement occurs in the optical fiber ribbon 4, and the optical fiber can be stored in the tray in a short time without damage.

Although the tray can be lifted by hand and rotated without the turntable 16, the use of the turntable 16 allows the tray to be efficiently and reliably prevented from dropping in a narrow space. Can accommodate the optical fiber ribbon 4.

When the extra length of the other end of each optical fiber ribbon 4 and the end of the line-side optical fiber ribbon 1 is to be processed, the inner lid 12 is made of translucent synthetic resin. Therefore, the inside of the connector tray portion can be visually visually recognized through the inner lid 12. For this reason,
While confirming each optical fiber ribbon 4 in the connector tray portion, it is possible to reliably perform the extra length processing of the other end of each optical fiber ribbon 4 and the end of the line-side optical fiber ribbon 2. .

Thereafter, the fusion spliced portion between each optical fiber ribbon 4 and each line-side optical fiber ribbon 1 is connected to the inner lid 12.
Of each of the line-terminated optical fiber tape cores 1 through the lead-out passage 12J between the front wall 12H of the inner lid 12 and the annular outer wall 12D of the reel portion 12B. Pull out. Then, the upper lid 13 is placed on the inner lid 12 and the other end of each optical fiber ribbon 4 and the end of each line-side optical fiber ribbon 1 are placed on the inner lid 12.
The line termination tray 10 in this state is accommodated in the termination unit 5 in the optical fiber cable distribution board 6. At this time, each line-side optical fiber ribbon 1 and each line-side optical fiber tape 1 are bent in an arc shape along the extraction guide portion 12L formed at the opening of the extraction passage 12J. No excessive bending force is applied to the line-side optical fiber ribbon 2.

Thus, the line termination tray 10 of the present embodiment is
, The line side optical fiber cable 1A
Is terminated so that it can be connected to the device-side optical fiber cord 3 via the optical fiber tape 4. Then, the line termination tray 10 that has completed the termination processing is placed in each of the six termination units 5 provided in the optical fiber cable distribution board 6.
A total of 156 are accommodated, six by six.

Here, a total of 156 line termination trays 10 have upper and lower two 8-unit optical connector adapters 14 and 14 attached to the front end thereof, and the optical connector 3A of the device-side optical fiber cord 3 is connected. Are connected. In this case, 1
The number of optical fiber connection cores by a total of 156 line termination trays 10 in one optical fiber cable distribution board 6 is 2496 at maximum, which is greatly increased as compared with about 1000 cores in the related art.

[0046]

As described above, according to the line termination tray of the optical fiber cable according to the present invention, the optical connector at one end of the optical fiber ribbon is connected to the optical connector adapter mounted on the main body tray. Then, one end of the optical fiber ribbon is processed on the main body tray, and the other end of the optical fiber ribbon is pulled out from the outlet of the inner lid. A first-stage operation of accommodating one end of the core wire in the connector tray portion, and the other end of the optical fiber tape core pulled out from the outlet of the inner lid is connected to the line side enclosed by the line side optical fiber cable. The other end of the optical fiber ribbon with one-end optical connector is processed with extra length on the inner lid together with the end of the optical fiber ribbon, and the upper lid is covered. To The line-side optical fiber ribbon is inserted into the fusion tray part by placing the other end of the optical fiber ribbon with one end optical connector and the end of the line-side optical fiber ribbon in the fusion tray. It can be easily terminated.

Since the first-stage work is performed in advance in the line termination tray production plant, the on-site work is only the second-stage work, so that the termination process can be performed more easily. it can. Therefore, the construction worker at the site does not touch the inside of the lower connector tray portion, thereby preventing the occurrence of a work error.

The line termination tray of the present invention is a line-side optical fiber tape of a line-side optical fiber cable via an optical fiber ribbon with a single-end optical connector, which is much smaller in volume and weight than a conventional FO cord. Since the core wire is terminated so as to be connectable to the device-side optical fiber cord, the termination process can be performed at a high density.

Further, the line termination tray of the present invention is formed in a thin case shape by a main body tray, a middle cover and an upper cover, and the optical fiber tape is provided in a connector tray portion between the main body tray and the middle cover. One end of the core wire is accommodated with extra length processing, and the other end side of the optical fiber tape is accommodated with extra treatment in the fusion tray portion between the inner lid and the upper lid. Therefore, it is small and lightweight, and the number of units housed in the optical fiber cable distribution board can be increased. As a result, the number of optical fibers that can connect the outdoor line-side optical fiber ribbon to the indoor device-side optical fiber cord in the optical fiber cable distribution board can be significantly increased,
The high density can be achieved.

In the line termination tray of the present invention, when the reel portion for winding the optical fiber ribbon in a loop and processing the extra length is provided on the main body tray and the inner lid, the optical fiber tape ribbon is provided. Can be wound around the reel on the main body tray and the other end can be wound around the reel on the inner lid, so that the excess length processing of the optical fiber ribbon can be easily performed. In this case, if a rotation center hole corresponding to the reel portion is provided at least in the main body tray and the inner lid, the rotation of the main body tray around the rotation center hole causes the reel portion on the main body tray to have an optical fiber. One end of the tape core can be easily wound without twisting, and similarly, by rotating the inner lid around the rotation center hole, the reel of the optical fiber tape is wound on the reel portion on the inner lid. Since the other end can be easily wound without being twisted, the extra length processing of the optical fiber ribbon can be more easily performed.

Also, in the line termination tray of the present invention,
When the inner lid is made of a translucent synthetic resin, it is possible to roughly visually recognize the inside of the connector tray through the inner lid, and while checking the optical fiber ribbon in the connector tray, The other end of the optical fiber ribbon can be reliably processed on the lid.

Further, in the line termination tray of the present invention, when the main body tray is provided with a retaining portion for locking one end side of the optical fiber ribbon in the longitudinal direction, When the other end is fused to the line-side optical fiber ribbon, or when the other end of the optical fiber ribbon is wound in a loop on the inner lid to perform extra length processing, etc. It is possible to prevent an unreasonable tensile force from being applied to one end side of the optical fiber ribbon accommodated in the cable. Therefore, even if a construction worker at the site erroneously pulls the optical fiber ribbon, no stress is applied to the optical fiber ribbon accommodated in the lower connector tray.

Also, in the line termination tray of the present invention,
When a draw-out guide portion for bending and drawing the other end side of the optical fiber tape core in an arc shape is provided on the inner lid, when handling a line termination tray on which termination processing has been completed, fusion is performed. An unreasonable tensile force can be prevented from being applied to the other end of the optical fiber ribbon accommodated in the tray.

[Brief description of the drawings]

FIG. 1 is a functional explanatory diagram of a line termination tray of an optical fiber cable according to an embodiment of the present invention.

FIG. 2 is a front view of a line termination tray according to one embodiment.

FIG. 3 is a view of the line termination tray shown in FIG.

FIG. 4 is a view of the line termination tray shown in FIG.

FIG. 5 is a view of the line termination tray shown in FIG.

FIG. 6 is a perspective view of a termination unit accommodating a line termination tray according to one embodiment.

FIG. 7 is a front view showing a schematic structure of an optical fiber cable distribution board provided with a termination unit accommodating a line termination tray according to one embodiment.

FIG. 8 is a front view of a main body tray constituting the track termination tray according to one embodiment.

FIG. 9 is a view of the main body tray shown in FIG.

FIG. 10 is a view of the main body tray shown in FIG.

FIG. 11 is a view of the main body tray shown in FIG.

FIG. 12 is a front view of an inner lid constituting the track termination tray according to the embodiment.

FIG. 13 is a front view of an upper cover constituting the track termination tray according to the embodiment.

FIG. 14 is an enlarged front view of a retaining portion formed on a main body tray of the track termination tray according to the embodiment.

FIG. 15 is a perspective view of a termination unit for explaining an optical fiber cable connection operation using the line termination tray according to one embodiment.

[Explanation of symbols]

 1A: Line-side optical fiber cable 1: Line-side optical fiber tape core wire 2: Line-side optical fiber tape core wire 1 UV element 3: Device-side optical fiber cord 3A: Optical connector 4: Optical fiber tape with one end optical connector Core wire 4A ... UV strand of optical fiber tape core wire 4 4B ... Optical connector C ... Fused connection point 5 ... Termination unit 5D ... Fusing worktable 6 ... Optical fiber cable distribution board 10 ... Line termination tray 11 ... Main body tray 11B ... Reel part 11F ... Rotation center hole 11J ... Retaining part 12 ... Inner lid 12A ... Drawer outlet 12B ... Reel part 12F ... Rotation center hole 12L ... Drawer guide part 13 ... Upper lid 13A ... Rotation center hole 14 ... Optical connector Adapter 15: heat-shrinkable tube 16: turntable

Claims (7)

[Claims] 1. A line-side optical fiber ribbon included in a line-side optical fiber cable of an optical fiber wiring network can be connected to a device-side optical fiber cord via an optical fiber tape with a single-ended optical connector. A line termination tray for end processing, which is configured in a thin case shape by a main body tray, an inner lid, and an upper lid, and an optical connector attached to the apparatus-side optical fiber cord can be connected to the main body tray. A connector tray portion is formed between the main body tray and the inner lid, the connector tray portion accommodating one end of the optical fiber ribbon with a one-end optical connector connected to the optical connector adapter. An outlet for the optical fiber ribbon is formed in the inner cover, and a line-side light contained in the line-side optical fiber cable is provided between the inner cover and the upper cover. A line termination tray for an optical fiber cable, wherein a fusion tray portion for accommodating the other end of the optical fiber ribbon with a one-end optical connector to be fusion-spliced to the fiber tape is formed. . 2. The main body tray and the inner lid are provided with a reel part for winding the optical fiber ribbon with a one-end optical connector in a loop and processing the extra length. 3. A line termination tray for an optical fiber cable according to claim 1. 3. The apparatus according to claim 2, wherein at least one of the main body tray, the inner cover and the upper cover has a rotation center hole corresponding to the reel portion. Line termination tray for optical fiber cables. 4. The optical fiber according to claim 3, wherein the main body tray or the main body tray and the inner lid are rotated by inserting the rotation center hole into a shaft formed on a rotary table. Cable track termination tray. 5. The line termination tray of an optical fiber cable according to claim 1, wherein said inner lid is made of a translucent synthetic resin. 6. The main body tray is provided with a retaining portion for locking one end of the optical fiber ribbon with one end optical connector in a longitudinal direction. A line termination tray for an optical fiber cable according to any one of the above. 7. The drawer guide portion provided on the inner lid, the other end side of the optical fiber ribbon with one end optical connector being bent in an arc shape and drawn out. 7. The line termination tray for an optical fiber cable according to any one of claims 6 to 6.