JP2001042135A - Closure for connecting optical cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform connecting, switching or branch-connecting operation of an optical fiber cable, to facilitate extension, and to compactly store an extra length and a connecting part of a coated optical fiber highly densely, without adversely affecting the transmission characteristics of an optical fiber cable. SOLUTION: A frame 42 fixed inside a closure 1 is provided with a tray storing case 4, in which a storing tray 10 consisting of plural trays 2 for connecting coated optical fibers and trays 3 for dropping them, is internally arranged. These plural trays 2, 3 are equipped with an in-and-out part 11 for guiding coated optical fibers in and out, a connector storing part 12 for storing a connector in which coated optical fibers coming from the in-and-out part 11 are mutually connected, and an extra length storing part 13 in which extra length of coated optical fibers are wound and stored; also, plural pieces of these trays 2, 3 for connecting and dropping coated optical fibers are divided into upper and lower parts, stacked in multiple layers, and provided in the tray storing case 4 so that they are freely insertable/removable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial, ground or underground section of a communication cable, in particular, an optical fiber cable having an optical fiber core (hereinafter referred to as an optical cable). An optical cable connection closure that is used to connect a connected or aerial or ground cable or underground cable to a drop optical fiber cable or a collective drop optical fiber cable, protects the connection portion of the optical cable, and stores the extra length of the core. It is about.

[0002]

2. Description of the Related Art Conventionally, when branching, pulling in, connecting, or the like of an optical cable, the cable cores are connected to each other in a closure, and a core connection extra length storage for accommodating the extra length of the cable cores. Trays are used. This tray has a core lead-in / out part serving as a part for leading / leading out a core, and optical fibers drawn out from the trunk lead-in / out part, and optical fibers drawn out from a trunk optical cable, or a core drawn out from a branching optical cable. There is a connector storage portion in which a connection portion such as a connector for connecting a connector is stored, and a core storage portion for further winding and protecting and storing the extra length of the connected core wire. However, it is used as a connection function dedicated closure or a drop function dedicated closure.

[0003]

However, in a communication network using an optical cable, as the cable density, the number of cores, and the transmission speed increase, the capacity of the excess cable length storage unit tends to be insufficient. If the connection function and the drop function are separate closures due to the diversification of multiple stacked storage toilets in the closure, the handling is troublesome,
In addition, the excess length of the core wire is poor, stress is often applied to the core wire, optical loss of the core wire occurs, adversely affects the transmission characteristics, and it is difficult to perform the work involved in connection branching and wiring arrangement, In addition, there is a problem that expansion cannot be easily performed and cannot be made compact.

The present invention has been made in view of these conventional circumstances, and can easily perform connection, switching, or branch connection of an optical cable without adversely affecting the transmission characteristics of the optical cable. The connection function and drop function are integrated and arranged. The storage and the increase / decrease for each core wire are easy and the expansion is easy. The connection part can be stored very compactly. It is an object of the present invention to provide an optical cable connection closure for installation in an inexpensive form.

[0005]

In order to solve the above-mentioned problem, the invention according to claim 1 connects a core lead-in / out part for leading / leading out an optical cable core and a core lead entering from the core lead-in / out part. Cable connection with multiple core storage trays and multiple core drop trays, each with a connector storage section for storing a connector that has been made, and a core storage section for winding and storing the extra core A tray storage case is provided on a frame fixed in the closure, and the core connection tray and the core wire drop tray are individually set in the tray storage case in a direction in which the core wire taking-out direction is the upper surface. It is equipped with a structure that can be horizontally inserted and removed so that it can be opened and held at a predetermined angle for each tray, and has a configuration that can separately store the core connection part and the core excess length separately. That.

According to a second aspect of the present invention, there is provided the optical cable connection closure according to the first aspect, wherein a plurality of core wire connection trays are detachably mounted on the tray base in a stacked manner, and are protruded from the tray base. An engaging recess for engaging with the engaged engaging projection is provided at a symmetrical position on both side edges of the bottom plate of the core connection tray, and the core connection tray can be detachably mounted in any of the front and rear directions. It is characterized by becoming.

According to a third aspect of the present invention, in the optical cable connection closure according to the first aspect, the core wire drop tray has an insertion structure including an exterior tray and an interior tray stacked inside the exterior tray. In addition, a pair of the exterior trays are connected by a hinge so as to be openable and closable in a double door.

Further, the invention according to claim 4 is characterized in that the core drop tray is such that a tape-side connection part, a branch part, and a single-core side of a core that branches a multi-core optical fiber tape core into a single-core optical fiber. An optical cable connection closure that has a fixed holding portion that can store the connection portion and fix the tension member of the drop optical fiber cable, draws out the core drop tray in the connected and stored state of the drop core, and can open and close freely. It is characterized by doing.

[0009]

In the optical cable connection closure according to the present invention, a plurality of optical fiber connection trays and optical fiber drop trays for protecting and storing a connection portion of an optical cable core and an extra connection portion are housed in a freely detachable and openable manner. It is very easy to open or remove any core connection tray and core drop tray to integrate and check the connection status, check, and adjust the core status. be able to. Each core connection tray or core drop tray is multi-layered in connection units. The core connection part is not fixed, and the excess core length can be arranged and stored after securing a radius of curvature. However, the optical fiber is accommodated with a certain degree of freedom in absorbing the excess core length, and does not adversely affect the transmission characteristics. Moreover, even if the upper cable connecting tray or the core drop tray is moved to the original position after the core is connected, the optical cable does not become slack, and the core does not bend excessively and has a curvature. It can be stored without forming an arc-shaped portion having a small radius, and can be safely protected, and the handling characteristics for taking out, connecting, and re-storing an arbitrary core can be improved. Furthermore, the storage tray, which is an aggregate of the core connection tray or the core drop tray, can be easily connected to an adjacent tray by being inserted into the tray storage case, and can be opened and closed by removing from the tray storage case. Thus, the connected trays can be separately opened and exposed, so that the connection work and the updating and expansion of each tray can be easily performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. A core connection closure 1 includes a storage tray 10 including a plurality of core connection trays 2 and a core drop tray 3. Although the interior is deployed, the core connection tray 2
The core drop tray 3 has a core lead-in / out part 11 for leading / leading an optical fiber core, a connector storage part 12 for storing a connector connecting the cores entering from the core lead-in / out part 11, and a core lead. A core storage portion 13 for winding and storing the excess length, and a plurality of the core connection trays 2 and the core drop trays 3 which are vertically divided and stacked in a multiplex manner to form a tray storage case 4 It is provided so that it can be inserted and removed freely.

The core connection tray 2 and the core drop tray 3 are molded products integrally formed of a synthetic resin, and have a substantially rectangular outer shape as shown in FIGS. , The inner surface side is formed in the same shape,
Engagement recesses 7 are provided at opposite side edge symmetrical positions of the bottom plate having the core wire lead-in / out portions 11 of the trays 2 and 3 so as to face each other. It is formed by fitting into the protruding engagement projection 8.

As shown in FIGS. 1 to 6, the storage tray 10 is a collection of a core connection tray 2 and a core drop tray 3 of a four-core collective storage type. Is stored and held, and the excess core length storage portion is drawn around the connector wire held from the connection connector held by the connector storage portion 12 and wound and held in a loop shape. 13 are provided, and a substantially rectangular core wire connection tray 2 and a core wire drop tray 3 having a core wire pressing piece 21 are used. In this case, the frame 4 ₂ in the tray accommodating case 4 that is fixed to the closure 1 is provided, the tray accommodating case 4 to the core wire connecting the tray 2
The core connection tray 2 and the core wire drop tray 3 are horizontally mounted in a direction in which the core wire extraction direction is the upper surface, and the core connection part and the core are connected. In addition to a configuration in which the extra wire length can be stored collectively, a lid piece 6 or a tray is rotatably provided on the upper surface of the core wire connection tray 2 or the core wire drop tray 3 so as to be openable.

For example, in the case of a six-stage tray storage case 4 as shown in the drawing, five core-connection trays 2 (one tray, 40 cores and 200 cores) are used as trays using the lower two stages. It is stacked on the base 5 and stored. When the tape connection is 400 cores, two tray bases 5 are used using the lower four stages. The core drop tray 3 is the tray storage case 3.
When the tape connection is 200 cores, it can be used from the upper stage to the fourth stage (use four drop trays), and when the tape connection is 400 cores, the drop tray from the upper stage to the second stage can be used. Can be mounted.

In order to make the plurality of core connection trays 2 detachable from the tray storage case 4, for example, a shelf case, they are used individually or as a stacked storage tray 10 which is mounted in a staggered manner in the front-rear direction. . In this case, the engaging concave portions 7 that engage with the engaging convex portions 8 protruding from the tray base 5 are provided at symmetrical positions on both side edges of the bottom plate of the core connection tray 2,
The core connection tray 2 is configured to be removably mounted in any of the front and rear directions. A locking claw 9 and a guide rib 17 are protruded from both side surfaces of the tray base 5, and the locking claw 9 is provided in the guide groove 1 of the tray storage case 4.
4 is slidably fitted into the guide groove 4 and is engaged with and disengaged from a lock portion 15 formed in the guide groove 14.
The core connection tray 2 can be pulled out of the tray storage case 4 and moved to a position where the core connection can be easily performed.

An elastic holding member (not shown) provided with a core wire insertion hole having a separation slit is provided in the core wire lead-in / out portion 11 having a tongue-shaped locking piece 18 formed in the core wire connection tray 2. ) Is press-fitted to ensure the support of the core wire, and this elastic holding member is used by selecting an elastic holding member having an insertion hole corresponding to the core wire diameter or the number of core wires. Further, the connector storage section 12 and the extra-core-length storage section 13 may be selectively partitioned by selecting guide ribs and side walls as needed, or may be integrally formed with a core wire holding piece 21 or a locking claw for preventing the floating of the core wire. A connector for forming a surplus core wire or a core wire connection portion by forming the core wire connection tray 2
It is also possible to ensure that the tray 2 can be securely held in the inside, or to combine the core connection tray 2 that divides only the connector storage part 12 or the core excess length storage part 13 into one,
The cores are separated and stored for each core connection tray 2, and the bending of the fiber cores from the cable insertion part is minimal, preventing twisting when storing the cores. Safe, high-density storage and high reliability To be obtained.

In this case, the engaging concave portion 7 of the upper core connecting tray 2 of the desired core connecting tray 2 is changed from the engaging convex portion 8 out of the multi-stacked core connecting trays 2. If it is removed, it can be pulled out from the tray storage case 4, the lid piece 6 can be removed, the overlapping surface can be opened, and the inner surface side of the lower core connection tray 2 is exposed, so that the connection wiring work of the storage core can be easily performed. it can. The core connection tray 2 has finger insertion windows 2 for shaping cores in the tray as necessary.
To form a 1 _1, it is also possible to allow clean how pay storage cord extra length.

Further, when connecting one core wire connecting tray 2 to the other core wire connecting tray 2, the engaging concave portion 7 is fitted into the tray storage case 4 and lightly pressed in the horizontal direction. It is elastically displaced by the pressing force, and is easily fitted into the engagement projection 8 of the tray base 5 to be connected and held. When the tray base 5 is slid toward the front side of the tray storage case 4 at the time of removal, the locking claw portion 9 is disengaged, and the core wire connecting tray 2 is pulled out together with the tray base 5 so that the engaging recess is formed. If the cable 7 is detached from the engaging projection 8, the core connection tray 2 can be pulled out and easily removed, and each operation of inspection, repair, and connection of the core in the core connection tray 2 can be easily performed. it can.

The lead-in / out section 11 is not limited to a single type provided on one side, but may be a pair type provided on both sides, that is, a double type provided at four corners.
Moreover, the core connecting tray 2 is formed by injection molding of synthetic resin.
Is formed in a substantially square, rectangular quadrangle or elliptical shape, so that the cord excess length storage portion 13 adjacent to the connector storage portion 12 includes core wire pressing pieces 21 and cover pieces 6 arranged at predetermined intervals. Consideration is given so that the core wire can be wound and held in a smoothly curved loop shape so as not to adversely affect the transmission characteristics. For example, the core wire connecting tray 2 can secure a radius of curvature of 30 mm or more to manage and store the core wires,
Various connection parts, for example, a fusion reinforcing sleeve, a mechanical sleeve, an MT connector, etc., can be stored therein, and a five-stage core wire connection tray 2 is stacked on a tray base 5 and provided detachably for each tray unit. The extra core length and the core connection part can be stored collectively. In this case, one of the core wire connection trays 2 may have a structure in which the connection portion is not fixed to have a degree of freedom in absorbing the excess core wire, and one tray may have 40 cores (4 cores). (10 tapes) can be stored, and if an identification holder is used, it is also possible to adopt a form in which the core wire can be identified in units of 20 fibers.

A plurality of storage trays 10 are placed and held in a tray-shaped tray storage case 4 in a superposed state as shown in FIGS.
Sleeve 1 ₁ split as shown _in, 1 incorporated in ₂ cylindrical closure 1 comprising from used but with the sleeve 1 _1, 1 ₂ is fixed detachably by means of a hinge fasteners 30, frame 4 a routing processing guide 31 to _1, and a cable clamping hardware 32 ₁ and the tension member end fitting 32 is formed integrally, the sleeve 1 _1, 1 ₂ of the interconnect ring 3 can be disposed fixed to the outside
3 is provided.

[0020] Referring to the example of the sleeve 1 _1, 1 closure 1 with ₂ and end plates 25 which are fitted in both end walls fitting portion via the spacer 26 to the end plate 25, 25, the trunk optical cable A is penetrated and the cable gripper 3
1 and the tension member of the cable is connected and connected to a tension member holding bracket 32. Also, a connection cord a derived from the main optical cable A
Are processed by the core connection storage case 10 and are led out from the end face plate 25 and wired as branch cables B and C.
(FIG. 1) The spacer 26 is provided with a large number of closing holes for inserting a drop cable, and the closing hole is opened at the time of pulling down so that the drop cable can be guided out of the closure. (Figure 6) the sleeve 1 _1, 1 ₂ is interposed to butt seal bonds the gasket to the dividing joint surfaces, connecting the hinge fasteners 30 made of a loop-shaped ring hinge portion provided in the outer sleeve retaining and It is designed to be integrated.

The engaging recess 7 provided in the core connection tray 2 can be inserted by inserting a support rod 24 or the like into the tray storage case 4 as needed when a plurality of core connection trays 2 are stacked. It may be used to fix and hold the connection, or the connection boss may be fitted and connected at each of the upper and lower stages.

As shown in FIG. 4, the tray base 5 for holding a plurality of the connection trays 2 horizontally in a direction in which the core wire taking-out direction is the upper surface and individually holding the connection trays 2 is as follows.
Juxtaposed a plurality of guide ribs 17 at intervals of a cord path on the core-guiding join the club, to form a plurality of cord passage 16 _1, the core wire tray and out through the respective guide pieces It can be distributed and wired.

Furthermore, the core connection closure 1 includes:
The single-core multi-core optical fiber ribbon shown in FIGS.
A tape-side connection part and a branch part of a drop cord that branches into
Wire drop tray 3 that can store single wire side connection part
Are installed inside the tray,
3 is an optical fiber lead-in / out section 11 for guiding optical fiber cores
And a core connecting the cores entering from the core lead-in / out section 11.
The connector storage section 12 for storing the connector
Tray 3 provided with a core wire extra length storage portion 13 to be rotated and stored
Are stacked in multiple layers, and the core is stored.
Can be fixed in the pulled-out state, and the core is connected and stored
It can be taken out and opened. This cord drop
Trays 3 are hinged portions 4 in a multi-layered state.
₁Open and close freely to make a set, and the tape core
Connector and extra cable length for each single core branched from
A core wire drop tray 3 that can be stored collectively is provided.
The core drop tray 3 is provided in the closure 1 in a plurality of stages.
To the tray storage case 4 provided in
You. In this case, the tray 3 is an external tray 3 ₁When,
The exterior tray 3₁Interior tray 3 stacked inside₂And
And the exterior tray 3
₁Hinged part 4₁Open and close freely with double doors
Then, the core drop tray 3 is obtained. For example, 4 hearts
Separate the core into a single core, or convert it to a single core
Replaced connection part and extra length storage case.

The plurality of core drop trays 3
However, a pair of elliptical cylindrical ribs 16 are arranged facing each other at intervals on the tray bottom surface so that the radius of curvature of the core wire can be turned back in an S-shape. Also, with the outer tray 3 ₁ of the locking claw portion 9 in both side surface portions, projecting the drop tension member attaching portion 17 _2, locking claw portion 9 is in the guide groove 14 of the tray accommodating case 4 in the closure The lock portion 15 is slidably fitted and formed in the guide groove 14.
The core drop trays 2 in the closure 1 as configuration disengaging by the drawer moved position from the tray accommodating case 4 core wire connecting operation Yes allowed to be conveniently, the drop tension member attaching portion 17 ₂ Is provided with a drop tension member gripper 27, and the drop optical fiber cable C is fixed. That is, in the drop tension member attaching portion 17 ₂ to openably hinged to the core wire pressing pieces 17 _1, No. A detachable drop that can hold down a single core wire from each tray of Nos. 1 to 4, protects the single core wire from jumping out, and further presses the drop tension member fixed to the drop tension member gripper 27 from above. holder 27 ₁ is provided, twisting help prevent drop optical fiber cable during movement of each tray has a structure for supporting so that it can smoothly add cerebrospinal induced upon movement of the drop optical fiber cable.

The lead-in / out section 11 is not limited to a single type provided on one side but may be a pair type provided on both sides, that is, a double type provided at four corners.
Moreover, since the core wire drop tray 3 is formed into a substantially square, rectangular quadrangle or elliptical shape by injection molding of synthetic resin, the core wire extra length storage part 13 adjacent to the connector storage part 12 is formed at a predetermined interval. Holding piece 21 of core wire a to be arranged
Also, the cover 6 is designed so that the core wire can be wound and held in a smoothly curved loop shape so that the transmission characteristics are not adversely affected. For example, the core drop tray 3 can secure a radius of curvature of 30 mm or more and can manage and store the core, and various connection parts b, for example, a fusion reinforcing sleeve,
A mechanical splice, MT connector, etc. can be stored, and the core wire drop trays 3 are stacked in four layers, and each core wire tray can be opened or closed or detached, and the core wire extra length and the core wire connection part are collectively Can be stored. In this case, one of the trays 3 may have a structure in which the connection portion is not fixed, and may have a degree of freedom in absorbing the extra core wire.
If an identification holder can be used to store the cores (corresponding to ten four-core tapes) and the identification holder is used, the core can be identified in units of 20 cores.

For example, in the combination of the interior and exterior trays, the trays shown in FIGS. 8B and 8D shown in FIG. 8 are integrally molded products, and are shown in FIGS. 8C and 8D and FIG. each tray in a) (b) is to scheme take to set by connecting the respective hinge 4 _1, it is also possible to attached the lid piece on the upper surface of the surface decor tray. Each tray shown in FIGS. 9 and 10 can be set in combination with each other.
(C), or a method may be employed to set FIG 9 (c) and 10 of each tray (a) coupled to the hinge portion 4 _1.

A plurality of the core drop trays 3 are stacked.
It is also placed and held in a shelf-like tray storage case 4
1 and a split sleeve 1 as shown in FIG.₁, 1
₂Used in a cylindrical closure 1 made of
The sleeve 1₁ , 1₂Is a hinge fastener 30
And the frame 4₂Is arranged
Wire processing guide 31 and cable gripping bracket 32₁ And te
The holding member 32 can be arranged and fixed.
Leave 1₁, 1₂Wiring ring that can be placed and fixed outside the
The battery 33 is provided. In this case, the wiring guide 31
Separate the movement between the tape core and the drop core,
The wire core is always placed behind the wiring guide 31.
You.

[0028] Referring to the example of the sleeve 1 _1, 1 closure 1 with ₂ and end plates 25 which are fitted in both end walls fitting portion via the spacer 26 to the end plate 25, the main line optical cable A Penetrated and cable gripping bracket 32 ₁
And the tension member of the cable is
The tension member gripping fitting 32 is connected and connected.
Moreover better that the core drop tray 3 in the form of using the drop tension member gripper 27 through the mounting portion 17 ₂ a structure detachable in the vicinity of the core-guiding join the club 11, drop tension member grounding wire 2
Mounting the 7 ₂ to drop tension members gripper 27, the ground wire 27 ₂ connected to the wiring guide 31 through the wire holder 27 _3, to facilitate the protection of the debit cable. Further, the connection core wire a derived from the core drop tray 3 is derived from the end face plate 25 and is connected to the branch cable B.
And C. The sleeve ₁ 1, _{1 2}
In this method, a split joint surface is butt-sealed and joined, but a hinge portion 30 formed of a loop-shaped ring is hooked on a hinge portion provided on the outside of the sleeve so as to be connected and integrated.

In the core drop tray 3 having the above configuration, when the tape core a enters from one of the core lead-in / out portions 11 of the core tray 3, it passes through the core wire passage and is used for holding the core. It is pushed by the locking piece 18 and enters one of the extra-core storage portions 13. These tape cores a
When the wire enters the extra-core storage portion 13 or the like, it passes through the full-length passage formed by the holding pieces 21. The tape core a is pressed by the locking piece 18 and the rib 16
Around the wound, and is connected to the connector b or bifurcation attached to the insertion guide ribs 12 _first connector housing portion 12, the core wire a leaving from the connector b is
After passing through the extra cord storage section 13, the cord exits from the other cord lead-in / out section 11 to the outside of the case.

As described above, when the optical fiber cable is pulled down to the subscriber's house or the like, each layer of the tray has a structure that is opened by 70 degrees or more.
When inserting the core wire a from one side of the
3 can be taken out to the other core wire lead-in / out section 11 side. When the core wire a is inserted from one side of the core wire lead-in / out portion 11 and stored in the core excess length storage portion 13, which side of both the core wire lead-in / out portions 11 depends on how the core wire a is wound. Can also be issued. As described above, the core wire a can be put into the core wire drop tray 3 from any of the core wire lead-in / out portions 11, and the curvature of the core wire a is not reduced (without overloading). The same or different core wire lead-in / out part 11 as the inlet side can be taken out as the outlet side. Thus, it is possible to freely select the entrance / exit side of the core wire and to facilitate the wiring of the core wire in the optical cable closure.

Here, the core lead-in / out portion 11 is provided with an elastically deformable elastic holding member c such as sponge rubber having a through hole, and the core a is dropped through the core through the through hole. And exits from the core drop tray 3. The elastic holding member for supporting the cord is a locking piece 1.
8. When the elastic holding member c is interposed in the cord lead-in / out section 11 in this manner, the cord a
When passing through 1, the core wire a rubs against the tray body,
Alternatively, it is possible to reliably prevent a tensile impact or the like.

[0032] Then, sequentially stacked with cord connection tray 2 in the tray accommodating case 4 of the optical cable closure 1 as a superposition of those a form obtained by connecting the core wire drop tray 3 with the hinge portion 4 ₁ (See FIG. 5). In this stacking, the core wire connection storage trays which are fixed by the band 28 and can be stacked and connected to each other without screwing or the like can be formed as the core wire connection closure 1 having a high-density storage structure (FIG. 5). reference). In this case, the core wire a is inserted from one core wire lead-in / out portion 11 and the connection portion b is connected to the connector housing portion 12.
, And wound around the central rib 16 to take out and wire from the same core lead-in / out part 11, or insert a core a from one core lead-in / out part 11, hold the connection part b, Around the extra-core storage section 13 and the other lead-in / out section 1
Wiring from the core 1 can be performed for each of the core drop trays 3 and can be arranged in the closure 1, and can be branched down from the tape core to a single core and pulled down.

For example, in the case of single-fiber separation, the sheath of the optical cable is stripped off at the site by about 500 mm, an arbitrary tape core wire (four cores) coming out of the throttle is cut at the farthest end (more than 500 mm long), and from the tip end. Single fiber separation using a tool at the position of 300 mm and drop optical fiber cable (×
4) Although tray housing after connecting, core wire a, which is introduced into the outer tray 3 ₁ is fixed by the elastic holding member c, No.
It branches into 1 to 4 and is stored in each tray.
That is, as shown in FIG. 2 interior trays 3 ₂
No. The single-core wire a of No. 2 was inserted from the core wire lead-in / out portion 11 and passed under the core wire holding piece 21 and routed to the extra-core wire storage portion 13, and the single-core connection portion b was fixed to the connector storage portion 12. the later core a winding of the rib 16 is derived from the core-guiding join the club 11 is dropped pull the drop optical fiber cable c to the outer closure 1 fixed with the outer tray 3 ₁ drop tension member gripper 27 . And No. simultaneously decorated tray _{3 2} even in the outer tray _{3 1} 1
Is arranged and wired in the connector storage section 12 and the extra cable length storage section 13, respectively. 2-4
Are secured in the closure 1 while being fixed to the drop tension member gripper 27 together with the single core wires coming out of the respective trays.

Further, in the case of using a branch core wire, the sheath of the optical cable is stripped off at the site by 500 mm, and the arbitrary tape core wire (4 cores) coming out of the throttle is moved to the farthest end (500 mm).
(Extra length), connected to the tape side of the branch core, and further connected to the single core of the branch core and the drop optical fiber cable c, and then stored in a tray. As shown in FIG. ribbon a ₁ introduced into ₁ is fixed by the elastic holding member c, No. It branches into 1 to 4 and is stored in each tray. For example, no. The second of the interior tray _{3 2,} No. 2 is connected to the lead-in / out part 11
The single core connection part b is passed through the core wire holding piece 21 and passed through the core wire extra length storage part 13 so that the single core connection part b is connected to the connector storage part 12.
The cord a After fixing derived from winding turn with core-guiding join the club 11 of the ribs 16, the fixed with the outer tray 3 ₁ drop tension member gripper 27, debited the drop optical fiber cable c to the outer closure 1 . And
The outer tray 3 within _1, one core-guiding join the club 11 from putting the branch core, the branch core wire separation unit b _1, the tape connecting portions b ₂ and the single-core connecting portions b, respectively connector housing 13
Fixed to, at the same time as interior tray _{3 2} No. No. 1 single wire a is routed, and arranged and wired to the extra wire length storage portion 13 respectively. While being fixed to the drop tension member gripping tool 27 together with the single wires coming out of the trays 2 to 4, they are used protected in the closure 1.

Each of the stacked core drop trays 3
Each of the trays can be individually pulled out forward from the tray storage case 4, and each layer of the tray drawn out can be opened and fixed at an angle of about 70 degrees or more. An arbitrary tray can be taken out without causing an influence such as loss on the core wire stored in the inside.

When the core wire drop tray 3 is a four-layer tray, the identification numbers 34 of No. ₁ to No. ₄ are sequentially assigned to the outer tray 31 and the inner tray 32 to facilitate wiring handling. In addition, a locking pin 35 for stopping the tray opening is provided on the side surface on the free end side of the tray to be mounted.
And a tray deflection preventing plate 36 when the tray is installed, and a pressure receiving pin 37 for preventing tray deflection is provided on the inner surface of the tray to prevent deformation between stacked trays.

An elastic holding member (not shown) provided with a core wire insertion hole having a separation slit is provided in the core wire lead-in / out portion 11 having the tongue-shaped locking piece 18 formed in the core wire drop tray 3. ) Is press-fitted to ensure the support of the core wire.
As the elastic holding member, a member having an insertion hole corresponding to the core diameter or the number of cores is selected and used. Further, the connector storage section 12 and the extra-core-length storage section 13 may be selectively partitioned by selecting guide ribs and side walls as necessary, or may be formed integrally with a core wire pressing piece 21 or a locking claw that prevents the floating of the core wire. In order to reliably hold the extra-length core wire or the connector serving as the core wire connection portion in the core wire drop tray 3, only the connector storage part 12 or the core excess length storage part 13 is partitioned. The trays 3 may be combined into a single form, the cores are separated and stored for each core drop tray 3, and the bending of the fiber cores from the cable insertion portion is minimal, and the twist during storage of the cores is reduced. To ensure high reliability with safe and high-density storage.

In this case, if the rod-shaped engaging projections 8 are removed from the engaging recesses 7 of the desired tray 3 from among the multi-tiered core drop trays 3, they can be pulled out of the tray storage case 4 and stacked. The mating surface can be opened, and the inner surface of the lower tray 3 is exposed by removing the tray 3 or the cover piece 6, so that the connection and wiring work of the storage core wire can be easily performed.

Further, when one of the core wire drop trays 3 is connected to the other core wire drop tray 3, it is fitted into the tray storage case 4 and is pushed in the horizontal direction, and is inserted into the engaging recess 7 of the through hole. Each of the trays 3 is inserted by inserting the rod-shaped engagement projection 8.
Are connected and held. Also, when removing, the engaging projection 8
When the core drop tray 3 is slid to the front side of the tray storage case 4, the locking claw portion 9 is disengaged, and the core drop tray 3 can be pulled out forward and easily removed. Inspection, repair, and connection of the core wires in the tray 3 can be easily performed.

As shown in FIGS. 1 and 5, a plurality of the core wire drop trays 3 are placed and held in a shelf-shaped tray storage case 4 in the same manner as the core wire connection tray 2. used incorporated into a cylindrical closure 1 comprising a sleeve 1 _1, 1 _2. And FIG.
As shown in (1), the connection core wire a led out of the core drop tray 3 is led out of the end face plate 25 and wired as a branch cable B and a drop optical fiber cable C. The through-hole engaging recess 7 provided in the core drop tray 3
When a plurality of core wire drop trays 3 are stacked, if necessary, a lid piece 6 is fitted and stopped with a lid pressing piece 22, and an engaging projection 8 such as an engaging rod is fitted to the tray storage case 4. It may be used to insert and connect and hold it fixedly, or it may be a form in which connecting bosses are fitted and connected for each of the upper and lower stages.

[0041]

According to the present invention, a tray storage case is provided on a frame fixed in a closure, and a core connection tray and a core wire drop tray are individually mounted on the tray storage case with the core wire taking-out direction facing upward. It is equipped with a structure that can be inserted and detached horizontally in the direction in which it can be inserted and detached, has a configuration that can be opened and held at a predetermined angle for each tray, and has a configuration that can collectively store the core wire connection part and the extra core length separately. The optical fiber cable connection function and the drop function can be integrated, the upper and lower core connection tray and the core drop tray can be easily engaged and disengaged, and can be easily stacked in multiple stages, and more than one The core connection tray and core drop tray can be used for optical cable connection, switching, branch connection, and recollection without adversely affecting the transmission characteristics of the optical cable. High-density storage structure with multiple layers in units of multiple connections makes it easy to store and organize tape cores, increase / decrease in cores easily, and easily add more units. Because it can be stored, any storage fiber tray can be quickly opened by opening any storage tray after the work of connecting the cords, the cords can be easily identified, and the connection parts can be readjusted or repaired easily. In addition to greatly improving the workability, each storage tray can be stacked as many as necessary, and the entire storage trays stacked in multiple stages can be accurately held to enhance safety.

According to the present invention, the inside of the core wire connection tray and the core wire drop tray is made into a multi-layer structure so that the storage of the core wire can be easily stored and the core wire can be wound and stored. Since there is room and the holding of the core wire is also buffered, there is no slack in the core wire, and even if each connection tray is expanded, the change in the length of the excess length of the stored optical fiber will not change. Because there is little change in the length of the extra length of the optical fiber is small,
It is possible to maintain good transmission characteristics by eliminating optical loss without excessive bending or small arcs occurring in the optical fiber core.
Furthermore, according to the present invention, when branching or pulling in a core wire, there is a degree of freedom in drawing and inserting the core wire into the connection tray, so that access to the core wire connection portion can be simplified in operation, and management and assembly can be performed. Disassembly work can be performed easily, and high density and high reliability can be obtained. In particular, the safety is greatly improved as a closure with a core connection part that is easily and securely connected without easily disconnecting or shifting the core connection trays stacked as many as necessary, High reliability can be obtained by storing the extra length of the cords, and the storage trays can be detached and attached without screwing between the storage trays, so that handling can be remarkably facilitated and downsizing can be achieved.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view of a use state of an embodiment of the present invention.

FIGS. 2A and 2B show a core wire connection storage case used in the example of FIG. 1, wherein FIG. 2A is a plan view and FIG.

FIGS. 3A and 3B show the core wire connection tray of the example of FIG. 1, wherein FIG. 3A is a developed plan view, FIG. 3B is a longitudinal sectional view taken along line bb,
(C) is a longitudinal sectional view taken along line cc.

FIGS. 4A and 4B show the tray base of the example of FIG. 1, in which FIG. 4A is a plan view, FIG. 4B is a front view, and FIG.

FIGS. 5A and 5B show the closure of the example of FIG. 1, in which FIG. 5A is a plan view showing the interior with a portion cut away, and FIG.

6 shows the closure of the example of FIG. 5, (a) is a front view thereof, and (b) is a longitudinal sectional view thereof.

FIG. 7 is a plan view showing a storage tray according to the embodiment of the present invention.

8 shows a core drop tray of the example of FIG. 1,
(A) is a plan view of an assembled state, and (b) is a plan view of a partially unfolded state.

9A and 9B show a core drop tray used in the example of FIG. 8, wherein FIG. 9A is a plan view of a surface interior tray, and FIG.
(C) is a plan view of the intermediate interior tray, and (d) is a plan view of the exterior tray.

10A and 10B show a part of another example of the tray shown in FIG. 8, wherein FIG. 10A is a plan view of an intermediate and surface interior tray, FIG. 10B is a side view thereof, FIG. d) is a side view thereof.

FIG. 11 shows a part of a tray of still another example of FIG. 8,
(A) is a plan view of the intermediate interior tray, (b) is a plan view of the cover piece, and (c) is a side view of the intermediate interior tray.

12A and 12B show a single-core separated wiring and one use state of the example of FIG. 8, wherein FIG. 12A is a plan view of an intermediate interior tray, and FIG. 12B is a plan view of an exterior tray.

FIGS. 13A and 13B show a state of using one of the branch core wires in the example of FIG. 8, in which FIG. 13A is a plan view of an intermediate interior tray, and FIG. 13B is a plan view of an exterior tray.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Closure 1 ₁ and 1 ₂ Sleeve 2 Core wire connection tray 3 Core wire drop tray 3 ₁ Exterior tray 3 ₂ Interior tray 4 Tray storage case 5 Tray base 6 Cover piece 7 Engagement concave part 8 Engagement convex part 9 Engagement Claw part 10 Storage tray 11 Core lead-out part 12 Connector storage part 13 Core extra length storage part 14 Guide groove 17 Guide rib 18 Locking piece 19 Locking claw part 20 Hinge part 21 Core wire holding piece 22 Lid holding piece 23 Hinge Part 24 support rod 25 end face plate 26 spacer 27 tension member gripper 29 locking claw part 30 hinge fastener 31 cable gripper 32 tension member gripper 33 wiring ring

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenji Mineshima 4-35-3 Yoyogi, Shibuya-ku, Tokyo Inside Japan Recomm Co., Ltd. (72) Akira Ozawa 4-35-3 Yoyogi, Shibuya-ku, Tokyo Japan, Inc. Inside RECOM (72) Inventor Akihito Nishimura 4-35-3 Yoyogi, Shibuya-ku, Tokyo Inside Japan RECOM Co., Ltd. (72) Inventor Tatsuya Ishihara 1300 Kitagaitoyama Irukashinda, Komaki City, Aichi Prefecture Nippon Telegraph and Telephone Materials Corporation (72) Inventor Akira Ono 2-3-1 Otemachi, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation ( 72) Inventor Akihisa Kajitani 2-3-1 Otemachi, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Yasuyuki Chiyoda-ku, Tokyo 2-3-1 Temachi Nippon Telegraph and Telephone Corporation F-term (reference) 2H038 CA37 CA38 CA65 CA68 5G375 AA18 BA27 CA19 DB16 DB23 DB41 EA04 EA17

Claims (4)

[Claims] 1. An optical fiber cable lead-in / out part for leading / leading an optical cable core, a connector storage part for receiving a connector connecting the cores entering from the fiber lead-in / out part, and a cable core extra length wound and received. An optical cable connection closure in which a plurality of core retention trays and core drop trays each having a core extra length storage unit are provided, and a tray storage case is provided in a frame fixed in the closure. The core storage tray and the core drop tray are individually mounted and detachably mounted horizontally on the tray storage case in a direction in which the core removal direction is the upper side, and each tray is opened at a predetermined angle. An optical cable connection closure characterized in that it has a configuration capable of holding the core wire connection portion and a core wire extra length individually and collectively. 2. The optical cable connection closure according to claim 1, wherein the plurality of core wire connection trays are removably stacked on the tray base in a stacked manner, and the engagement protrusions protrude from the tray base. An engagement concave portion for engaging the core connection tray is provided at a symmetrical position on both side edges of the bottom plate of the core connection tray, and the core connection tray can be detachably mounted in any of the front and rear directions. Optical cable connection closure. 3. The optical cable connection closure according to claim 1, wherein the core wire drop tray has an insertion structure including an exterior tray and an interior tray stacked in the exterior tray, and the exterior tray. Characterized in that the pair of hinges is openably and closably connected to each other at a hinge portion to form a core drop tray. 4. The optical cable connection closure according to claim 1, wherein the core drop tray is a tape-side connection of a core branching a multi-core optical fiber tape core into a single-core optical fiber. And a fixed holding portion for fixing the tension member of the drop optical fiber cable, which can store the branch portion and the single-core side connection portion, and pulls out the core drop tray in the connection and storage state of the drop core,
An optical cable connection closure characterized in that it can be freely opened and closed.