JP4855306B2 - Optical cable connection closure - Google Patents

Description

  The present invention is an optical cable connection closure for branching an optical fiber cable (hereinafter referred to as an optical cable) for a communication line wired indoors and outdoors such as an office, factory, general residential house, and other buildings. The present invention relates to an optical cable connection closure that greatly simplifies the workability and can safely and easily perform a cable arrangement process after connection with a terminal device for optical communication.

  Generally, when branching, drawing in, or connecting an optical cable, an optical fiber extra-length storage tray for connecting the optical cable cores to each other in the closure and storing the connection part and the extra length of the optical cable core is provided. Known closures are known. In this closure, a connecting portion such as a connector for connecting optical fiber cores drawn from the main optical cable or core wires drawn from the branching optical cable is housed, and an extra length portion of the connected core wire is wound. It is used as a thing equipped with the extra wire length storage part which protects by rotating. (Japanese Patent Laid-Open No. 2003-172827)

An optical cable connection closure disclosed in Patent Document 1 includes an optical cable introduction part for introducing an optical cable, an optical cable gripping part for holding an optical cable introduced from the optical cable introduction part, and a core wire surplus winding and storing a core extra length of the optical cable. An optical cable storage case provided with a long storage portion and a core wire connection portion storage portion formed in communication with the extra length storage portion of the core wire is disclosed in which a cover body is provided so as to be openable and closable. Is provided with a connecting tray having a cord extra length storage portion.
JP 2003-172827 A

However, in a communication network using an optical cable, there is a demand for an optimum wiring form of the optical access network, good workability of the connection wiring, and further providing an optical access service quickly and inexpensively. However, when installing the optical communication terminal device, it must be considered that the wiring cable sufficiently satisfies the characteristics of optical communication, particularly the signal transmission characteristics of the optical fiber cable.
However, conventional arrangements of optical communication terminal equipment indoors and outdoors such as offices and residences are various, and even if one connection from an optical outlet is taken, inconvenience occurs in wiring, and optical communication characteristics can be satisfied. In many cases, the optical fiber loss is not suitable for terminal processing, the allowable minimum curvature of the optical fiber cable cannot be maintained, and the wiring work is complicated. Not only is it troublesome to have to carry out wiring work every time it is added, but it also cannot be used safely so that there is no optical signal loss, and the appearance of the cable is also bad. It was.

  The present invention aims to eliminate these conventional drawbacks, and can provide an optical access service quickly and inexpensively, makes the wiring connection work of the optical cable extremely easy, and maintains the minimum allowable curvature of the optical cable for optical communication. The characteristics of the cable can be sufficiently satisfied, the workability of the core wire storage work can be greatly improved, the number of man-hours for wiring work can be reduced, the cable can be fixed, the handling of connection wiring to optical communication terminal equipment can be remarkably simplified, and wiring It helps to optimize the construction, and can maintain the connection so that communication line connection failure does not occur, improve the safety of wiring management, and provide a reliable optical cable closure at assembly cost at a low cost It is aimed.

The present invention is to solve the problems described above, and upstream and optical cable introducing portion for introducing a downstream side of the main optical cable arrangement drop optical cable, upstream and downstream of introducing the optical cable entry portion of the main optical cable arrangement drop optical cable An optical cable gripping portion to be gripped, a core wire extra length storage portion for winding and storing the extra lengths of the main optical cable and the drop optical cable , and a core wire connection portion formed in communication with the extra length extra length storage portion An optical cable connection closure comprising an optical cable storage case provided with a cover body, the optical fiber connection case being provided in the optical fiber connection portion storage part, and an end of the optical fiber upstream of the main optical cable and the optical fiber of the drop optical cable a connecting unit holder for holding the optical cable connecting portion and the end portion is connected to, core extra length on the upstream side of the main optical cable and drop optical cable core wire excess DOO storage tray having a plurality of the drop optical cable core excess length storage pocket for housing the said is equipped at a space on the back of the storage tray into the optical cable housing case, the rear space of the storage tray A main optical cable core length storage pocket for storing the uncut core wire extra length of the main optical cable in the core wire extra length storage section is provided in the storage tray , while forming the core wire extra length storage section; A storage sheet for storing the core length of the upstream side of the main optical cable and the core length of the drop optical cable is stored in the extra length storage section of the drop optical cable so that it can be inserted into and removed from the drop optical cable extra length storage pocket. It is a thing.

In the optical cable connection closure according to the present invention, the storage tray formed adjacent to the connection portion holder for holding the optical cable connection portion and formed with a drop optical cable core extra length storage pocket has a storage space behind the storage tray. Winding or slackening together the extra length of the main optical cable upstream of the optical cable connection section held in the optical cable storage case and held in the connection holder, and the extra length of the drop optical cable downstream. Can be inserted and stored in the storage sheet, making it easy to organize the drop optical cable, and easily handle wiring when it is necessary to relocate and upgrade terminal equipment, such as relocation and maintenance. it can.

Furthermore, in the optical cable connection closure according to the present invention, a storage tray having a plurality of drop optical cable core wire extra length storage pockets on both sides of the connection portion holder for holding the optical cable connection portion is provided in the optical cable storage case. is equipped at the housing space to the rear, each winding by separating the core wire surplus length of the connecting portion drop optical cable of the main optical core extra length of cable and the downstream side of the upstream side of the optical cable connecting portion for holding the holder Or, it can be loosened and stored in the storage sheet, so that it can be processed without the need for a connection tray, the handling of the connection wiring to the optical communication terminal equipment can be greatly simplified, and the processing can also be performed for the optimization of the wiring work.

In the present invention, a main optical cable core extra length storage pocket is provided adjacent to one of the drop optical cable core extra length storage pockets, and the main optical cable core extra length is formed on the back surface of the storage tray. By storing it in the space, it is possible to store the core wire in a rounded manner, so that it is possible to easily check, repair, adjust and work on the connection status.

Further, in the present invention, the storage sheet is made of a foldable transparent or translucent plastic sheet that can be freely opened and closed, and is provided with a bent tongue-shaped locking piece at the opening edge, so that the storage sheet is the core wire. Inserted and locked in the extra length storage pocket, and provided with a guide for guiding the extra length of the upstream main optical cable and the extra length of the drop optical cable in the drop optical cable core extra storage pocket The cord extra length can be easily inserted directly into the storage sheet that can be inserted and locked into the cord extra storage pocket, and the cord extra length can be taken in and out by pulling the storage sheet out of the pocket. so, the configuration is simple, can handle there is no trouble in handling operations, such as taking out purse and pulled out of the housing seat of the core wire.

The present invention includes an upstream side and an optical cable inlet portion for introducing a downstream side of the main optical cable arrangement drop optical cable, the optical cable gripping portion for gripping an upstream side and a downstream side of the main optical cable arrangement drop optical cable to be introduced from the light cable entry portion, the main Optical cable storage case comprising a core wire extra length storage portion for winding and storing an extra length of an optical cable and a drop optical cable , and a core wire connection portion storage portion formed in communication with the extra length extra length storage portion An optical cable connection closure provided with a cover body, provided in the core wire connecting portion housing portion, and connecting an end portion of the upstream core wire of the main optical cable and an end portion of the core wire of the drop optical cable. drop for housing a connecting portion holder for holding the optical cable connecting portion, and a core wire surplus length of the upstream side of the core wire extra length and a drop optical cable of the main optical cable Storage tray having a plurality of optical cable core wire excess length accommodating pockets, wherein the optical cable housing back of the storage tray is equipped at a space in the case, the rear space of the storage tray the core wire excess length storage section together they form a said storage tray main optical cable core excess length storage pocket for accommodating the core wire surplus length of the non-cleavage of the main optical cable to the core wire excess length storage section is provided, the drop optical cable core extra length Connection of optical cable by storing the storage sheet for storing the core length of the upstream side of the main optical cable and the core length of the drop optical cable in the storage pocket so that it can be inserted and removed in the storage pocket. Without inconvenience in wiring, the characteristics of optical communication can be fully satisfied, there is no loss of optical communication, it is easy to adapt to terminal processing, and the allowable minimum curvature of optical fiber cable is also maintained. It is easy to improve the workability of the core wire storage and simplify the wiring work, and it is also necessary to carry out the wiring work every time it is moved or added, such as relocation and maintenance of terminal equipment. However, it can be easily handled and can be used safely.

Further, in the present invention, a storage tray provided adjacent to the connection holder for holding the optical cable connection portion and formed with an extra length storage pocket is provided in the optical cable storage case with a space behind the storage tray, Winding or slackening the core wire extra length of the main optical cable on the upstream side of the optical cable connection portion held in the connection portion holder and the core length extra length of the drop optical cable on the downstream side, and storing them in the storage sheet, or Install a storage tray with multiple drop optical cable core extra storage pockets on both sides of the connection holder that holds the optical cable connection section, and install it in the optical cable storage case with a space behind the storage tray, and hold it in the connection holder each separate core wire extra length and the downstream core wire surplus length of the drop optical cable of the main optical cable upstream of the optical cable connecting portions by winding or slacken the By storing it in the delivery sheet, the configuration can be made compact and lightweight, optical access service can be provided quickly and inexpensively, the wiring connection work of the optical cable is also made very easy, and the storage sheet is pulled out from the pocket and opened and closed The extra length of the core can be taken in and out, so that the minimum allowable curvature of the optical cable can be maintained, the core can be stored, the optical communication characteristics can be fully satisfied, the number of man-hours for wiring work can be reduced, and the cable can be fixed. The connection and wiring of cables can be remarkably simplified, and it helps to optimize the wiring work. Connector connection can be maintained so that communication line connection failure does not occur, and the safety of wiring management can be improved, and reliability in assembly work It is possible to provide an optical cable connection closure with low cost.

Furthermore, the present invention is configured to provide a main optical cable core extra length storage pocket adjacent to the drop optical cable core extra length storage pocket and store the main optical cable core extra length in a space formed on the back surface of the storage tray. This makes it easy to check, repair, adjust, and work on the connection status, and to accommodate the extra length of the optical cable, so that the core can be wound. There is room for storage, and since the core of the upstream main optical cable and the core of the downstream drop optical cable are buffered by the storage sheet, there is no slack in the core, and the optical fiber In addition to eliminating optical loss without causing excessive bending or small arcs in the core, the transmission characteristics can be maintained well, and when using optical communication, the terminal can be easily attached and detached. Can continue, can significantly improve the core wire connection workability can be well safe mounting switching wiring work is also simple appearance.

A first embodiment of the optical cable connection closure according to the present invention will be described with reference to the examples of FIGS. 1 and 2. A pair of optical cable introduction portions 1 for introducing the upstream and downstream optical cables a are provided in parallel. An optical cable gripping portion 2 for gripping the optical cable a entering from the introduction portion 1, a core wire extra length storage portion 3 for winding and storing the extra wire length of the optical cable a, and a core wire extra length storage portion 3 communicating with each other An optical cable connection closure in which a cover body 6 is detachably or openably / closably provided on an optical cable storage case 5 having a core wire connection portion storage portion 4 formed, and an end portion of the core wire upstream of the optical cable a optical cable connecting section 7 the end of the core wire of the drop optical cable b is connected, for example, a communication line having a plug or receptacle is connected to the end of the splice or connector or cable a An optical cable storage case is provided with a storage tray 10 having a plurality of connecting portion holders 8 for holding adapters or the like that can be removably connected to SC-type connectors or MT-type connectors in a connecting portion, and a drop optical cable core extra storage pocket 9. 5 is provided with a space c on the back surface of the storage tray 10, and the upstream side of the optical cable a and the drop optical cable b are detachably inserted into the drop optical cable core extra storage pocket 9. A storage sheet 11 for storing the extra length of the core wire is provided.

In this case, a storage tray 10 that is provided adjacent to the connection portion holder 8 that holds the optical cable connection portion 7 in the vertical direction and that has a core wire extra-length storage pocket 9 is formed in the optical cable storage case 5 in the back surface of the storage tray 10. The drop optical cable core wire extraneous lengths on both sides of the optical cable connection portion 7 held in the connection portion holder 8 are collectively wound or slackened and stored in the storage sheet 11. Is good.
The drop optical cable core extra storage pocket 9 or the storage tray 10 is provided with a locking uneven portion that can hold the storage sheet 11 so that the storage sheet 11 is displaced in the drop optical cable extra storage pocket 9. It is also good to be careful not to jump out.

  Further, in this optical cable connection closure, the main optical cable extra cable length storage pocket 12 is provided adjacent to the drop optical cable extra cable length storage pocket 9 in accordance with the extra length of the optical cable a. The extra length of the core wire is rounded or slackened and stored in the space d formed by the partition wall 13 in the space c on the back surface of the storage tray 10.

Furthermore, the accommodating sheet 11 to be deployed freely inserted into and removed from the drop optical cable core excess length storage pockets 9, bending lines 11 ₁ made of plastic sheet clamshell and is opened and closed transparent or translucent, the side edges bending the tongue-like locking piece 11 ₂ configured in a bag shape, and includes a knob piece 11 ₃ to the opening edge, and slackened to wheel up by winding a drop optical cable core excess length or a substantially U-shape Yes houses or easy to remove, when inserted into and removed from the drop optical cable core excess length storage pockets 9, Yes and easily withdrawn from the drop optical cable core excess length storage pockets 9 by holding the knob piece 11 _3, the Extra length of the core wire can be easily inserted directly into the storage sheet 11 that can be inserted and locked into the storage pocket 9 and arranged, or the storage sheet 11 can be pulled out of the pocket 9. Since the extra length of the optical fiber can be taken in and out by opening and closing, the optical fiber can be stored while maintaining the allowable minimum curvature of the optical cable, and the storage work can be done quickly and easily.
The storage sheet 11 is slid to the bottom surface of the optical cable storage case 5 and stored in a slightly curved manner in the space c of the optical fiber storage section 3 when inserted into the drop optical cable cable storage pocket 9. if the support engages the engaging piece 11 ₂ in the upper surface of the storage tray 10, it can be stored compactly by utilizing space effectively, accommodating sheet 11 drop optical cable core excess length storage pockets 9 The extra length of the drop optical cable core can be rounded and inserted and stored in the storage sheet 11 while being inserted and stored in the storage sheet 11, which can be handled easily and has good workability.

In the optical cable connection closure, the connection tray 8 is formed by the protruding elastic ribs on the storage tray 10 so that the optical cable connection 7 is fitted and held. Therefore, it is considered that the optical fiber holding piece 14 is appropriately provided on the rib to prevent the optical cable from being lifted or detached, or to be easily guided to the extra optical fiber length storage pocket 9.
The drop optical cable core extra storage pocket 9 is provided with a guide 15 on the back side of the storage tray 10 for guiding the upstream main optical cable extra length and the downstream drop optical cable extra length . The storage sheet 11 can be easily put in and out, and further useful for gently storing the storage sheet 11.

Further, in the optical cable storage case 5, an optical cable is provided so as to face the optical cable gripping part 2 with a grommet made of a seal member 16 such as a synthetic rubber or other elastic member interposed in an opening for introducing the optical cable a and the drop optical cable b. A gripping tool base 17 with a gripping portion 2 is provided next to the storage tray 10 to improve the safety of the wiring management of the optical cable a and the drop optical cable b, and a reliable optical cable connection in assembly work becomes possible. In addition, it is possible to remarkably simplify the handling of connection wiring to optical communication terminal devices, and it is possible to provide an optical cable connection closure that can be used for optimizing wiring work and greatly improve connection workability.

The optical cable storage case 5 and the cover body 6 provided on the optical cable storage case 5 are made of a plastic synthetic resin or other durable material, and the cover body 6 can be attached to or detached from the case body. For example, the cable can be fixed with a simple operation with few man-hours for wiring work. It is better to ensure that this is possible.
Further, the optical cable storage case 5 is provided with an adhesive member such as a wall mounting screw fixing hole and a steel desk, a magnet adsorbing on a steel surface such as a panel, or a double-sided adhesive tape for fixing a wall surface, an indoor wall surface or a desk, etc. It can also be easy to install. By arranging this optical cable storage case 5 on the wall surface of the building or aerial, it is possible to carry out connection wiring work with a simple operation, and to cover and connect the cover 6 to the optical cable storage case 5 so that the connection means is not exposed. In addition to being able to be protected and used in a state of good appearance, connection means can be easily attached and detached during maintenance or cable separation, and wiring can be facilitated.

In the cable storage case 5 having the above configuration, the optical cable a of the main optical cable entering from the optical cable introducing portion 1 is fitted and inserted into the optical cable introducing portion 1 while being sandwiched between the locking members of the cable gripping tool 2, and along the outer periphery. The extra length of the main optical cable core is stored in a space d on the back of the storage tray 10 from the main optical cable extra length storage pocket 12 or loosened in a substantially U shape. If extended lower part of the (downstream core wire stretching), remove the core wire was cut at the midpoint of the main optical cable core excess length storage pockets 12, fixed to the grip base 17 is attached to cable gripper 2 ₁ drop optical cable b Then, after connecting the cut main cable and the core of the drop optical cable b by using the optical cable connection portion 7 of the mechanical splice, the optical cable connection portion 7 is fitted and fixed to the connection portion holder 8 in the storage tray 10. Then, the excess lengths of the upstream and downstream cores are rounded in a drop optical cable extra length storage pocket 9 on the lower side of the connection portion holder 8 or loosened into a substantially U shape and stored in the storage sheet 11. In order to extract the connection surplus length, it is only necessary to pull out the storage sheet 11 stored in the drop optical cable core wire extra length storage pocket 9 and take out the core wire to perform the connection processing work. The drop optical cable b is connected to the terminal device. If it is connected to a communication device, it can be connected in a state where the signal transmission characteristics are sufficiently satisfied by inserting the connector of the connection terminal.

The obtained prevents that core wire rubs against the optical cable housing case main body 5, tensile, etc. can also be reliably prevented impact, in addition to be a safe interconnection, to perform the wiring connection work without optical signal loss The cable can be fixed with a simple operation with less wiring work, making it possible to connect the optical cable with safety and reliability, and the connector where each end of the optical cable is connected to each other reliably. Connection can be maintained, especially connection can be maintained so that communication line connection failure does not occur, wiring management safety is improved, reliability of assembly work is also possible, and handling of connection wiring to optical communication terminal equipment is greatly simplified In addition, the connection workability can be greatly improved by helping to optimize the wiring work.

  In this embodiment, the bending radius can be made smaller than the limit value of the bending radius of the conventional optical fiber. For example, there is a holey optical fiber as an optical fiber. In this holey optical fiber, the existence of holes in the cladding around the core lowers the effective refractive index of the cladding and increases the difference in refractive index between the core and the cladding, thereby reducing radiation loss due to bending. Although the optical fiber suppresses the increase, the holey optical fiber is highly resistant to bending and twisting. With respect to the workability effect, the workability effect can be further improved by using the structure shown in FIGS.

A second embodiment of the optical cable connection closure according to the present invention is shown in FIG. 3, but a pair of optical cable introduction portions 1 for introducing the upstream and downstream optical cables a are arranged side by side and enter from the optical cable introduction portion 1. An optical cable holding portion 2 for holding the optical cable a, and holds an optical cable connection portion 7 such as a splice or a connector to which the end of the core wire upstream of the optical cable a and the end of the core of the drop optical cable b are connected. A storage tray 10 provided with a plurality of drop optical cable core extra storage pockets 9 on both sides of the connection holder 8 is provided in the optical cable storage case 5 and can be inserted into and removed from the drop optical cable extra cable storage pocket 9. Is provided with a storage sheet 11 for storing the extra length of the core, and the extra length of the drop optical cable is set on the upstream side and the downstream side, respectively. Since it can be wound up or loosened and stored in the storage sheet, it can be processed neatly without entanglement of the core wire, and it can be remarkably simplified in handling the connection wiring to optical communication terminal equipment indoors and outdoors, and optimization of wiring work It can also be usefully processed. In the figure, the same reference numerals denote the same parts and configurations as those in the first embodiment.

In this case, the storage tray 10 formed adjacent to the left and right of the connection portion holder 8 that holds the optical cable connection portion 7 and formed with the extra cable length storage pocket 9 is disposed in the optical cable storage case 5 in the back surface of the storage tray 10. Is installed with a space c, and the core length of the main optical cable on the upstream side of the optical cable connection portion 7 held in the connection portion holder 8 and the core length of the drop optical cable on the downstream side are separately wound. Or it is good to make it loosely accommodate in the storage sheet 11.

The optical cable connection closure which shows 1st Example of this invention is shown, (a) is the front view which removed the cover body and represented the inside, (b) is the center longitudinal cross-sectional view to which the cover body was attached, (c) is It is the bottom view . The storage sheet | seat used for the example of FIG. 1 is shown, (a) is the top view, (b) is the center longitudinal cross-sectional view. The optical cable connection closure which shows 2nd Example of this invention is shown, (a) is the front view which removed the cover body and represented the inside, (b) is the center longitudinal cross-sectional view which attached the cover body.

a optical cable b drop optical cable c, d space 1 cable introduction part 2 optical cable gripping part 3 core wire extra length storage part 4 core wire connection part storage part 5 optical cable storage case 6 cover 7 optical cable connection part 8 connection part holder 9 drop optical cable core wire slack storage pocket 10 accommodating tray 11 accommodating sheet 11 ₁ folding line 11 _second locking pieces 11 ₃ knob piece 12 main optical cable core excess length storage pocket 13 partition wall 14 cord pressing piece 15 guide 16 seal member 17 gripper base

Claims (6)

And upstream and optical cable introducing portion for introducing a downstream side of the main optical cable arrangement drop optical cable, the optical cable gripping portion for gripping an upstream side and a downstream side of the main optical cable arrangement drop optical cable to be introduced from the light cable entry portion, the main optical cable and drop optical cable A cover body is attached to an optical cable storage case having a core wire extra length storage portion that winds and stores the extra length of the core wire, and a core wire connection portion storage portion formed in communication with the extra length cord storage portion. An optical cable connection closure provided,

A connection portion holder that holds the optical cable connection portion that is provided in the core wire connection portion storage portion and to which the end portion of the core wire on the upstream side of the main optical cable and the end portion of the core wire of the drop optical cable are connected;

A drop optical cable core surplus storage pocket for storing the core length of the upstream side of the main optical cable and the core length of the drop optical cable ;

A plurality of storage trays are provided in the optical cable storage case with a space behind the storage tray, and the space on the back of the storage tray forms the extra length storage portion ,

A main optical cable core length extra storage pocket for storing the uncut core length of the main optical cable in the extra length storage section is provided in the storage tray,

A storage sheet for storing the core length of the upstream side of the main optical cable and the core length of the drop optical cable is stored in the extra length storage section of the drop optical cable so that it can be inserted into and removed from the drop optical cable extra length storage pocket. What you did

An optical cable connection closure.
2. A closure for connecting an optical cable according to claim 1, wherein a storage tray provided adjacent to a connection holder for holding the optical cable connection portion and having a drop optical cable core extra storage pocket is formed in the optical cable storage case on the back side of the storage tray. Equipped with space,

The core wire extra length on the upstream side of the optical cable connecting portion held in the connection holder and the extra length of the drop optical cable on the downstream side are collectively wound or slackened and stored in the storage sheet. An optical cable connection closure. 2. A closure for connecting an optical cable according to claim 1, wherein a storage tray having a plurality of extra core wire storage pockets on both sides of a connection portion holder for holding the optical cable connection portion is provided in the optical cable storage case at a space behind the storage tray. Equipped with,

The main optical cable upstream length of the main optical cable on the upstream side of the optical cable connecting portion held by the connection holder and the extra length of the drop optical cable on the downstream side are separated and wound or slackened and stored in the storage sheet. An optical cable connection closure. 4. The optical cable connection closure according to claim 2, wherein a plurality of main optical cable core extra length storage pockets are provided adjacent to one of the drop optical cable core extra length storage pockets. An optical cable connection closure. The optical cable connection closure according to claim 4, wherein the storage sheet is formed of a foldable transparent or translucent plastic sheet that can be freely opened and closed, and has a bent tongue-like locking piece at the opening edge . An optical cable connection closure, wherein the storage sheet is inserted and locked in the extra wire length storage pocket . Induced in the optical cable connecting closure according, the core wire surplus length of the core wire extra length on the upstream side of the main optical cable in the drop optical cable cores excess length storage pocket and the downstream side of the drop optical cable to claim 4 or claim 5 A closure for connecting an optical cable, characterized in that a guide is provided on the back side of the storage tray .

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