JP4217352B2 - Optical cable connection closure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides an optical cable, particularly an optical fiber cable (hereinafter referred to as an optical cable) having an optical fiber core wire, in an underground or an aerial section, for the outer sheath connection at an optical cable connection point and connection with an optical cable such as an underground cable or an aerial cable. The present invention relates to a closure for connecting an optical cable that protects a connecting portion of an optical cable core and stores an extra length of the core.
[0002]
[Prior art]
Conventionally, when branching, drawing in, or connecting optical cables, a cable connection extra length storage tray is used to connect the cable cores to each other within the closure and to store the extra length of the optical cable cores. Yes. This core wire connection extra length storage tray is composed of a core wire lead-in / out part which is a part for leading / extracting the core wire to / from the tray main body, and optical fiber core wires drawn out from the optical cable for main line led out / in from the core wire lead-in / out part or A connector housing for storing connectors such as connectors for connecting the core wire drawn from the branching optical cable, and a core wire extra length storage portion for winding and protecting the extra length of the connected core wire. The one with is known.
[0003]
[Problems to be solved by the invention]
However, in optical communication networks that use optical cables, the capacity of the extra cable length storage section tends to become insufficient as the density and number of optical cables increase, and a large number of core connection connections are stored in the closure. Due to the diversification of the trays, the extra length of the core wire has deteriorated and the core wire is often stressed, the optical loss of the core wire causes an adverse effect on the transmission characteristics, and the work and wiring arrangement associated with connection branching There is a problem that it is difficult to do, and that expansion cannot be easily handled and it cannot be made compact.
[0004]
The present invention has been made in view of these conventional circumstances, and can easily carry out optical fiber cable connection, switching or branch connection work without adversely affecting the transmission characteristics of the optical cable. In addition to storage and organization, the purpose is to provide an easy-to-handle optical cable connection closure in an inexpensive form that can be easily increased and decreased for each core wire and that can be easily expanded and that can store connections in an extremely compact manner. It is what.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a connection tray that is detachably mounted in a closure, and includes a core wire lead-in / out portion that guides / leads a core wire of an optical cable, and a core wire that enters from the core wire lead-in / out portion. Deployed a core wire connection storage tray that consists of a plurality of connection trays, each of which has a connector storage part for storing connectors connected to each other and a core wire extra length storage part for winding and storing the extra wire length. In the optical cable connection closure, the connection tray constituting the core wire connection storage tray is provided with a plurality of core wire presser pieces on the peripheral side wall of the connection tray via a core wire presser piece connecting hinge part so as to be opened and closed. The core wire connecting portion and the extra length of the core wire can be separately stored, and the core wire presser piece and the receiving piece abutting the core wire presser piece are provided so as to have a locking uneven part. And held by the cord presser piece That connects the finger insertion window for shaping the core wire of the tray facing the closed position of the cord holding pieces are provided respectively to connect the tray and cord retainer piece.
[0006]
Further, the present invention is such that, in the core wire connection storage tray, a pair of connection trays are connected in a double door manner so as to be openable and closable by a tray connecting hinge so as to face the upper surface of the connection tray. The opening / closing lock portion is provided with a locking claw on the opposite side surface of the opposite side surface, and a locking piece rotatably provided to be engaged with and disengaged from the locking claw.
[0007]
Furthermore, the present invention provides the core wire connection storage tray, wherein the connection tray is a tray having an inclined side wall whose height gradually decreases toward the tray connecting hinge portion side, and the opposing surfaces of the pair of connection trays are formed. It is configured to be a wedge-shaped case in a joined state, and is formed in a cylindrical shape or arranged in parallel vertically.
[0008]
[Action]
In the optical cable connection closure according to the present invention, a plurality of connection trays for protecting and storing the connection portion and the connection excess length portion of the optical cable core are detachably attached to each other, so that any connection tray can be opened or removed. As a result, the connecting work of the core wires and the inspection, confirmation and adjustment of the connection status can be performed very easily.
In addition, each connection tray does not fix the core wire connection section, and the core wire surplus length can also be held and held by the core wire presser piece while securing the radius of curvature, so that the flexibility of absorption of the core wire surplus length is possible. So that the transmission characteristics are not adversely affected.
Moreover, it is possible to easily and reliably handle the extra length of the core wire by opening and closing the core wire holding piece during the core wire connection work, and even if the upper connection tray is moved and returned to the original position after the tray is closed The core of the optical cable is not slackened by the core presser piece, it can be stored without causing the core to be bent excessively and without forming an arc-shaped part with a small radius of curvature, and can be safely protected. Since the core wire lead-in / out portion can be safely reversed while maintaining an appropriate radius of curvature, handling work is extremely simple and workability can be greatly improved.
[0009]
Furthermore, the connection tray, which is a collection of the core wire connection storage trays, is installed in the closure, so that it can be easily held with the adjacent connection tray. It can be exposed separately, the connection work and the renewal and expansion of the core wire connection storage tray can be facilitated, and by having a finger insertion window in the connection tray constituting the core wire connection storage tray, The core wire to be held can be shaped from the outside, and the core wire storage state in the core wire connection storage tray can be maintained appropriately and safely, and the reliability of workability can be improved.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In an optical cable connection closure 1, a core wire connection storage tray 10 including a plurality of connection trays 2 is detachably mounted on a frame 4 fixed in the closure. However, the connection tray 2 has a core wire lead-in / out part 11 for leading / out the optical fiber core wire, a connector housing part 12 for housing a connector connecting the core wires entering from the core wire lead-in / in part 11, and a core wire A core wire surplus storage unit 13 is provided for winding and storing the surplus length, and a plurality of connection trays 2 are overlapped to form a core wire connection storage tray 10.
[0011]
The connection tray 2 is a molded product integrally formed of synthetic resin, and has a substantially rectangular outer shape as shown in FIGS. 4 to 8 and has an inner surface formed in substantially the same shape. The pair of connection trays 2 are connected to each other in such a manner that they can be opened and closed by a tray connection hinge portion 3 so as to face each other so as to face the upper surface, and are connected to the peripheral side walls of the connection trays 2 and 2 , respectively . via the hinge portion 14, 14 ₁ provided with a plurality of cores hold pieces 15, 15 ₁ openably is a core wire connecting portion c and the cord extra length d as a each can be stored separately.
In addition , the engagement recesses 7 and 7 are provided opposite to each other at symmetrical positions on both side edges of the bottom plate of the connection tray 2 where the core wire lead-in / insertion portion 11 is provided. The engagement projection 8 is detachably fitted.
[0012]
Incidentally, the connection tray 2 of the core wire connecting the storage tray 10 includes a cord retainer pieces 15, 15 _1, facing the core wire pressing piece 15, 15 ₁ to and in contact with the receiving piece 16, 16 ₁ Rock And a locking claw 19 on the opposite side surface of the connection tray 2 and a locking piece 20 that is pivotably engaged with and disengaged from the locking claw 19. with the finger insertion windows 23, 23 ₁ for shaping the core wire in the connection tray 2 faces the closed position of the core wire pressing piece 15, 15 ₁ to connect the tray 2 and core wire pressing piece 15 ₁ provided are but a finger insertion window 23, 23 ₁ other position facing the core wire guide piece 21, connected without opening the core wire holding pieces 15 and 15 ₁ can be provided by selecting a predetermined position It is possible to adjust the core wire storage state in the connection tray 2 from the outside of the tray 2. .
[0013]
Furthermore, the connection tray 2, a tray having an inclined side wall 2 ₁ gradually decreases in height toward the 3 side that tray coupling hinge, the pair of connection trays 2, 2 opposing surface in bonded state as a wedge-shaped case, by interposing the frame 4, but are also available polymerization articulated cylindrically, parallel vertically to the tray coupling hinge portion 3 of the connection tray 2 on the frame 4 upward It can also be deployed.
[0014]
The connection tray 2 is provided with a core wire guide piece 21 at an appropriate place, and an attachment portion 22 to the frame 4 is provided so that the extra length of the core wire can be stored and the tray can be easily inserted and removed. Furthermore, inside the connection tray 2 is a connector storage portion 12 in which a connector for connection as a core wire connection portion c is stored and held, and an extra length of the core wire derived from the connection connector held in the connector storage portion 12 A substantially rectangular connection tray 2 having a core wire guide piece 21 is used, which is provided with a core wire extra length storage portion 13 that is wound around d and wound in a loop.
The connection tray 2 is detachably provided in the engagement convex portion 8 provided on the frame 4 fixed in the closure 1 so that the core wire connection portion and the extra length of the core wire can be individually stored in the connection tray 2. And
[0015]
Further, an elastic holding member (not shown) provided with a core wire insertion hole with a separation slit is press-fitted into the core wire lead-in / out part 11 formed in the connection tray 2 to ensure the support of the core wire. The elastic holding member is selected from those having insertion holes corresponding to the core wire diameter or the number of core wires.
Further, the connector storage portion 12 and the core wire extra length storage portion 13 may be divided by selecting guide ribs and side walls as necessary, or a core guide piece 21 or a locking claw for preventing the core wire from floating is integrally formed. Then, the connection tray in which the extra length core wire and the connector that becomes the core wire connection portion can be securely held in the connection tray 2 or only the connector storage portion 12 or the core wire extra length storage portion 13 is partitioned. 2 may be combined into a single configuration, and the core wires are separated and stored separately for each connection tray 2, and the bending of the fiber core wire from the cable insertion part is minimal, preventing twisting when the core wire is stored. High reliability is achieved with high density storage.
[0016]
In this case, if the engagement concave portion 7 of the desired connection tray 2 is removed from the engagement convex portion 8 from the cylindrical connection tray 2, it can be pulled out from the configuration of the core wire connection storage tray 10 in the closure 1. The connection tray 2 can be opened by the hinge portion 3 so that the inner surface side of the connection tray 2 is exposed and the connecting wiring work of the storage core wire can be easily performed.
[0017]
Furthermore, when one connection tray 2 is connected to the other connection tray 2, if the engagement recess 7 is lightly pushed into the engagement protrusion 8, the engagement recess 7 is elastically displaced by the pressing force and is engaged. It is easily fitted and held in the convex portion 8 so that the inspection, repair, and connection of the core wire in the connection tray 2 can be easily performed.
[0018]
The core wire lead-in / out part 11 is not limited to a single type provided on one side, but may be provided in pairs on both sides, that is, a double type provided at four corners, and connected by injection molding of synthetic resin. Since the tray 2 is formed in a substantially square, rectangular quadrilateral or oval shape, the core wire guide pieces 21 arranged at predetermined intervals in the core wire extra length storage portion 13 adjacent to the connector storage portion 12 provide transmission characteristics. Care is taken so that the core can be wound and held in a smoothly curved loop so as not to adversely affect.
For example, the connecting tray 2 can secure a radius of curvature of 30 mm or more and can handle and store the core wire, and can store various connecting portions such as a fusion reinforcing sleeve, a mechanical splice, an MT connector, 4, the connection tray 2 is superposed and provided so as to be detachable in units of each tray, so that the extra length of the core wire and the core wire connecting portion can be individually stored.
[0019]
A plurality of connection trays 2 in the core wire connection storage tray 10 are placed and held on the frame 4 in a stacked manner, and as shown in FIGS. 2 and 3, a cylindrical closure 1 comprising _two sleeves 1 ₁ and 1 _2. built used within, although worktable 5 optionally is accommodated, the sleeve 1 _1, 1 _2, as well as fixing detachably the hinge fasteners 30 butted with a gasket 6, the frame 4 the optical cable gripping bracket 31, and a tension member end fitting 32 is formed integrally includes the sleeve 1 _1, 1 ₂ of the end plate 25 which can be disposed and fixed at both end faces.
[0020]
Referring to the example of the closure 1 with the sleeve 1 _1, 1 ₂ of the end walls fitting portion fitted to the end plates 25, through the spacer 26 to the end plate 25, the optical cable gripping the main line optical cable is through The tension member of the optical cable is connected and connected to a tension member gripping bracket 32, which is fixed by the bracket 31. The sleeves 1 ₁ and 1 ₂ are butt-sealed and joined to the split joint surfaces with a gasket 6 interposed therebetween. The hinges 30 formed of a loop ring are hooked to the hinge portion provided outside the sleeve and integrated. It is supposed to be.
[0021]
Incidentally, the connection tray 2 engaging recesses 7 provided in may be used to connect fixed held fitted to the engaging convex portion 8 when the connection tray 2 has a plurality of polymerization, the mounting portion 22 It can also be set as the form connected using.
[0022]
Further, as shown in FIG. 9, a cover piece 9 is mounted horizontally in a direction in which the core wire extraction direction of the connection tray 2 is the upper surface and can be freely opened and closed via the tray connecting hinge portion 3. It is also possible to use a configuration in which the connector connecting portion 12 and the core wire surplus length storage portion 13 are separately housed in the core wire connecting portion and the core wire surplus length when the core wire is connected. It can also be removably arranged on the work table 5 to be set.
In this case, the locking claw 19 to the both side surfaces of the cover strip 9 and the connection tray 2, equipped with a locking piece 20, provided with a finger insertion window 23, 23 ₁ to a connection tray 2 and core wire pressing piece 15 ₁ even when the core wire receiving without opening the cord pressing piece 15, 15 ₁ the core wire accommodating work with the core shaping the outer connection tray 2 are also available with ease.
[0023]
10 to 12, the core wire connection storage tray 10 provided in the underground light closure 1 has a configuration in which the connection tray 2 is arranged vertically in parallel with the frame 4. The engaging concave portions 7 are inserted into the engaging concave portions 7 and the adjacent connection trays 2 are connected in parallel.
[0024]
In any case, in the connection tray 2, when the core wire a is inserted from one side of the core wire lead-in / insertion portion 11, when it is stored in the core wire extra-length storage portion 13, it is taken out to the other core wire lead-out portion 11 side. be able to.
In addition, when inserting the core wire a from one side of the core wire lead-in / insertion portion 11 and storing it in the core wire extra-length storage portion 13, depending on how the core wire a is wound, either side of both the core wire lead-in / out portions 11 Can also be put out.
As described above, the core wire a can be put into the core wire connection storage tray 2 from any one of the core wire lead-in / out portions 11, and the curvature of the core wire a is not reduced (without overloading). The core wire lead-in / out part 11 which is the same as or different from the core wire lead-in / out part 11 on the entrance side can be taken out as the outlet side, thereby allowing the core wire to freely enter and exit the core wire in the optical cable closure. The convenience of wiring can be achieved.
[0025]
Then, as the core wire connecting the storage tray 10, the connection tray 2,2 as a superposition of those with linked form with the tray coupling hinge portion 3, so as to be sequentially polymerized to the optical cable closure 1 (See FIGS. 3 and 12). The superposed core wire connection storage tray 2 has a core wire a inserted from one core wire lead-in / insertion section 11, a connection portion c inserted into the connector storage section 13, and a core wire surplus length taken into the core wire surplus length storage section 13. It can be arranged for each connection tray 2 and arranged in the closure 1 in a wiring form that is rotated and taken out from the other core wire lead-in / out part 11.
That is, when branching an optical cable, it is possible to connect and store the cores regardless of whether the branched optical cable is generated in the forward direction or the reverse direction, as viewed from the main optical cable, and the branched optical cable from both the upper and lower sides of the main optical cable. It is possible to make a loop connection to the cable, and it is possible to cope with an increase in the number of connection parts, and it is possible to store a non-connected core wire or a reserved core wire.
[0026]
【The invention's effect】
The present invention, in the optical cable connecting closure of cord connecting the storage tray configured to connect tray plurality Again removably mounted within the closure is deployed, connected tray, the peripheral side wall of the connection tray, core A plurality of core wire presser pieces are provided so as to be openable and closable via a presser piece connecting hinge portion, and the core wire connection portion and the extra length of the core wire can be individually stored. A finger insertion window for shaping a core wire in a connection tray held by the core wire pressing piece is provided with a locking uneven portion facing the receiving piece abutting the core wire pressing piece, and the core wire presser is provided. By facing the closed position of the piece and providing it to the connection tray and the cord holding piece respectively , the cord connecting portion is not fixed, and the cord extra length is also secured with a radius of curvature, Because it can be held and stored, It is stored with a degree of freedom in the collection, does not adversely affect the transmission characteristics, can be easily engaged and disengaged with the configuration of the core wire connection storage tray, can be easily overlapped, and multiple sheets are stacked The connecting tray has a core wire lead-in / out portion for leading and guiding the optical fiber core from the core wire lead-in / out portion, a connector housing portion for housing connectors connecting the core wires entering from the core wire lead-in / out portion, and an extra length of the core wire. Since it is equipped with an extra length storage section that is wound and stored, it is possible to quickly take out the stored optical fiber core by opening an optional connection tray after the core connection work, and also to identify the core Easy and easy to readjust and repair connections, greatly improve workability, stack as many connection trays as necessary, and accurately align the entire core connection storage tray High safety with retention It is.
[0027]
Further, according to the present invention, it is possible to easily and reliably handle the extra length of the core wire by opening and closing the core wire holding piece during the core wire connection work, and move the upper connection tray to the original position after closing the tray. Even if it is returned, the core wire is held by the core wire pressing piece, so that the optical fiber core wire is not slackened, it is not excessively bent in the core wire, and it can be stored without generating an arc-shaped portion with a small curvature radius. Since it can be protected and the core wire lead-in / out section can be safely reversed while maintaining an appropriate radius of curvature, handling is extremely simple and workability can be greatly improved.
In addition, the opening and closing type of the core cord presser can accommodate the extra length of the core wire inside the connection tray, and there is room for winding and storing the core wire, while holding the core wire in a buffering manner. As a result, the length of the extra length of the optical fiber is small since there is little change in the length of the extra length of the optical fiber that is accommodated even if each of the cord connection storage trays is expanded. Therefore, the optical fiber core can be kept in good transmission characteristics without any optical loss without causing excessive bending or a small arc.
In addition, a finger insertion window for shaping the core wire in the connection tray constituting the core wire connection storage tray is provided on the connection tray or the core wire press piece facing the closed position of the core wire presser piece. In addition, the core wire held by the core wire pressing piece can be shaped from the outside, and the core wire storage state in the core wire connection storage tray can be maintained appropriately and safely, and the reliability of workability can be further enhanced. .
[0028]
Furthermore, according to the present invention, the core wire presser piece in the connection tray is of an openable / closable type, so that the core wire can be led into and out of the core wire connection storage tray when the core wire is branched and retracted. In addition, access to the work core connection part can be simplified, and the connection tray can be freely attached and detached within the closure by connecting using a connector, and any connection tray can be replaced independently for management or Assembly and disassembly work can be easily performed, and high density and high reliability can be obtained. In particular, the connection trays stacked in multiple stages as much as necessary do not come off or shift, and the safety is greatly improved as a closure with a core connection part that can be easily and securely connected and easily identified. High reliability in storing the extra line length can be obtained, the storage trays can be attached and detached without screwing, etc., and handling can be greatly facilitated, and compactness can be achieved.
[Brief description of the drawings]
FIG. 1 is a partially cut side view of an embodiment of the present invention.
2 is a partially cut plan view of FIG. 1. FIG.
3 is a front view of the example of FIG. 1, wherein (a) is an external front view, and (b) is a cut front view taken along line AA of FIG.
4A and 4B show the unfolded state of the core wire connection storage tray in the example of FIG. 1, FIG. 4A is a plan view thereof, FIG. 4B is a longitudinal sectional view taken along line aa, and FIG. It is a side view.
5 shows the unfolded state of the core wire connection storage tray of the example of FIG. 4, where (a) is a front view thereof, (b) is a longitudinal sectional view taken along line bb of FIG. 4, and (c) is FIG. Fig. 5 is an enlarged longitudinal sectional view taken along line cc of Fig. 4, (d) is an enlarged longitudinal sectional view taken along line dd of Fig. 4, and (e) is an enlarged longitudinal sectional view of a base portion of the core wire pressing piece.
6 shows a folded state of the core wire pressing piece of the example of FIG. 5, wherein (a) is a plan view thereof and (b) is a side view thereof. FIG.
FIG. 7 shows a folded state of the core tray in the example of FIG. 6, wherein (a) is a plan view thereof and (b) is a side view thereof.
8 is an explanatory plan view showing a use state of the example of FIG.
FIG. 9 is a developed plan view showing another embodiment of the core tray according to the present invention.
FIG. 10 is a partially cutaway side view showing another embodiment of the present invention.
FIG. 11 is a side view of the example of FIG.
12 is a front view of the example of FIG. 10, where (a) is an external front view, and (b) is a cut front view taken along line BB of FIG.
[Explanation of symbols]
a core wire c core wire connecting portion d core wire extra length 1 closure 1 ₁ , 1 ₂ sleeve 2 connection tray 2 ₁ inclined side wall 3 tray connecting hinge portion 4 frame 5 work table 6 gasket 7 engaging recess 8 engaging protrusion DESCRIPTION OF SYMBOLS 9 Cover piece 10 Core wire connection storage tray 11 Core wire extraction | insert part 12 Connector storage part 13 Core wire extra length storage part 14,14 ₁ Core wire presser piece connection hinge part 15,15 ₁ Core wire presser piece 16,16 ₁ receiving Piece 17 Locking concave portion 18 Locking convex portion 19 Locking claw 20 Locking piece 21 Core wire guide piece 22 Mounting portion 23, 23 _One- finger insertion window 25 End face plate 26 Spacer 30 Hinge fastener 31 Optical cable gripping bracket 32 Tension member gripping Metal fittings

Claims (4)

A connection tray 2 that is detachably mounted in the closure 1, and stores a core wire lead-in / out part 11 for leading / out a core wire a of an optical cable and a connector that connects the core wires entering from the core wire lead-in / out part 11. Optical cable connection for providing a core wire connection storage tray 10 configured by stacking a plurality of connection trays 2 each having a connector storage portion 12 and a core wire surplus length storage portion 13 that winds and stores the core wire surplus length d. In the closure for
Connecting the tray 2 constituting the core wire connecting the storage tray 10, the peripheral side wall of the connection tray 2, a plurality of cores hold pieces 15 and 15 ₁ through the core wire pressing piece connecting hinge part 14, 14 ₁ openably provided a core wire connecting portion c and the core wire surplus length d are each a structure that can be housed separately, the core wire hold pieces 15, 15 _1, a core wire pressing piece 15, 15 ₁ provided with a locking uneven portions 17, 18 opposite the abutting receiving pieces 16, 16 _1, finger for shaping the core wire in the connection tray 2 held by the core wire pressing piece 15, 15 ₁ optical cable connecting closure, characterized in that face to the insertion window 23, 23 ₁ closed position of the cord holding pieces 15, 15 ₁ provided respectively connected tray 2 and core wire pressing piece 15 _1. In cord connections the storage tray 10 according to claim 1, constituting the connecting a pair of connection trays 2,2 so that the upper surface of the tray 2 faces coupled openably and closably by the tray connecting hinge 3 double doors formula An optical cable connection closure characterized by being made. The core wire connection storage tray 10 according to claim 2 , wherein the connection trays 2 and 2 are trays having inclined side walls that gradually decrease in height toward the tray connecting hinge portion side, optical cable connecting closure, characterized in that the opposing surfaces of the tray 2, 2 has a configuration in which a wedge-shaped case in bonded state. 4. The core wire connection storage tray 10 according to claim 2 or 3, wherein a locking claw 19 is provided on opposite sides of the pair of connection trays 2 and 2 so as to be freely engaged with and disengaged from the locking claw 19. An optical cable connection closure characterized by comprising an engaging piece 20.

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