JP2004212896A - Cabinet for optical cable connecting part storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate a connection wiring operation for an optical fiber cable, to easily change and increase many coated optical fiber connections in a cabinet, and to safely store a cable connection part and an excessive-length of the fiber by making it easy to mount a cord. <P>SOLUTION: This cabinet is constituted as a batch fiber storage tray 2 or individual fiber storage tray 3 for a plurality of layers in which single-fiber or multi-fiber branched from fibers can be stored individually stored together with connection parts and excessive-length fibers while the fiber storage trays are coupled as groups in a free opening/closing state by hinges 4 in vertical layers. In this cabinet, a plurality of blocks of batch fiber storage trays 2 and individual fiber storage trays 3 are arranged separately to the right and left across a center passage for leading an optical cable in from one center end of the cabinet main body 1 so that lead-through cables and branch cables are stored and on the center passage, a cable gripper 6 is arranged. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection section of a fixed wiring section, a connection point of an optical cable that is drawn in from indoors to an indoor section, and an overhead cable in a wiring section of a communication cable, particularly an optical fiber cable having an optical fiber core (hereinafter referred to as an optical cable). BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cable connecting part storage cabinet used for connecting an optical cable such as a cable or an underground cable to a branch optical fiber cable, protecting the connecting part of the optical cable and storing the extra core length.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, when branching, dropping, connecting, or the like of an optical cable, the cable cores are connected to each other in a cabinet, and a core connection extra length storage case for storing the extra length of the cable core has been used. I have. This case is composed of a core wire storage tray, and a core wire lead-in / out portion serving as a portion for guiding a core wire into / out of the tray body, and optical fiber core wires drawn out from a trunk optical fiber cable led out from the core wire lead-in / out portion. Alternatively, a connection portion storage portion in which a connection portion for connecting a core wire drawn from the branching optical cable is stored, and a core wire excess length storage portion in which a surplus portion of the connected core wire is wound and protected for storage. Are known. (For example, JP-A-9-288217)
[0003]
[Problems to be solved by the invention]
However, in a communication network using optical cables, as the cable density and the number of cores increase, the capacity of the excess core storage section tends to be insufficient, and the number of core storage trays in a cabinet has been diversified. The handling of branch cores is troublesome, and the excess length of the cores is poor, stress is often applied to the cores, optical loss occurs in the cores, adversely affecting the transmission characteristics, and connection and branching. In addition, there is a problem that it is difficult to carry out the work and the arrangement of individual wirings, and furthermore, it is not easy to cope with the addition and the size cannot be reduced.
[0004]
The present invention has been made in view of these conventional circumstances, and can easily perform an optical cable connection or branch connection operation and a re-storage operation without adversely affecting the transmission characteristics of an optical cable. The layered high-density storage structure makes it easy to store and organize individual cores and increase or decrease each core, and it is also easy to add and store connection parts extremely compactly and safely. It is an object of the present invention to provide an inexpensive form of a cabinet for storing an optical cable connection portion which is easy to handle and protects the connection portion and stores the extra length of the cord.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 accommodates a core wire lead-in / out portion for leading / leading an optical fiber core wire, and a core wire connection portion connecting the core wires entering from the core wire lead-in / out portion. A core storage tray, in which a plurality of trays each having a connection part storage part and a core wire storage part for winding and storing the core wire storage part are stacked and arranged, is disposed in the cabinet main body through the draw-in tray. The core wire storage tray is removably fixed, and the core wire storage tray is connected and opened and closed by a hinge portion in a state where the upper and lower layers are overlapped to form a set. A plurality of layers of core storage trays that can collectively or individually store the connection portion and the core excess length for each core are provided, and a plurality of blocks of the collective core storage tray and the individual core storage tray are drawn through. Cabinets for storing lines and branch lines With separating deployed right and left at a central passage for introducing the optical cable from the center one end of the body, characterized in that deploying the cable gripping portion on the central passage.
[0006]
According to a second aspect of the present invention, in the cabinet for storing an optical cable connection portion according to the first aspect, the core wire storage tray is configured to disengage and disengage a lowermost core wire tray stacked on the drawing-in tray with the mounting portion. As described above, two or more locking pieces protruding from the drawing tray in different directions can be inserted into and removed from mounting holes formed in a base plate fixed in the cabinet body, and slide under the base plate. It is characterized by being freely mounted.
[0007]
According to a third aspect of the present invention, in the cabinet for storing an optical cable connecting portion according to the first or second aspect, the collective core storage tray and the individual core storage tray route a radius of curvature of the core wire to a large diameter. A possible cylindrical or elliptical cylindrical rib is provided protrudingly on the tray bottom surface, and the upper and lower layer trays are detachably fixed by being inserted into and removed from a mounting portion formed at an inner position surrounded by the rib. I do.
[0008]
According to a fourth aspect of the present invention, there is provided the optical cable connecting portion storage cabinet according to the first, second, or third aspect, wherein the concave / convex portions are provided on an inner portion or a bottom portion of the core wire storage tray for storing the collective core wires or the individual core wires. And a knob protruding from an outer portion of the core wire storage tray, and a perforated fixing band fitted into the knob is detachably provided.
[0009]
According to a fifth aspect of the present invention, in the optical cable connecting portion storing cabinet according to the first, second, or third aspect, a pair of a pin and a pin bearing as a hinge portion is provided outside the core wire storing tray so as to face each other. The pins of one of the core wire storage trays are fitted into hinge bearings of the other core wire storage tray, and the two trays are rotatably connected to each other.
[0010]
According to a sixth aspect of the present invention, in the cabinet for storing an optical cable connection portion according to the second or third aspect, the base plate has a notch hole having an area larger than a locking piece protruding from the drawing-in tray; A mounting hole having a slide notch hole communicated with the notch hole is provided opposite to the mounting hole, and is fixed to a cabinet body having a removable or openable cover with a gap provided on the back side of the base plate. It is characterized in that the engaging piece is slid and moved under the locking piece.
[0011]
[Action]
The core storage tray in the optical cable connection part storage cabinet of the present invention is configured such that a plurality of core trays for protecting and storing a connection extra length of a branch core of an optical fiber are rotatably and detachably connected to each other. Therefore, it is possible to open or take out an arbitrary core wire storage tray, and to perform connection work of the core wire branched from the core wire and check, check, and adjust the connection status very easily and safely. In addition, the core storage tray, which is formed by stacking the core trays of the collective core storage or the individual core storage in the hinge opening / closing structure, is detachably fixed in the cabinet body through the draw-in tray. Two blocks of the tray are separated and installed on the left and right, and the draw-in line and the draw-down line can be separated and arranged to diversify the specifications. The core wire storage case has a high-density storage structure with multiple layers per connection unit , Each core tray secures the connector of the core connection part, and the core core length can be handled and stored after securing the radius of curvature, so it is stored with a degree of freedom in absorbing the core core length. There is no adverse effect on transmission characteristics.
In addition, since the core tray has a plurality of individual storage trays after the core is connected, the optical fiber core does not become slack, and the core is not excessively bent and has an arc-shaped portion having a small radius of curvature. It can be stored without generating and can be safely protected by attaching and detaching the protective sheet. Furthermore, the cores can be individually stored in the core tray, inserted into the draw-in tray, and arranged in the cabinet body, and removed from the draw-in tray and opened and closed to remove the connected core storage tray. It can be exposed separately, making it easy to connect and update and expand the core storage tray, improve safety by simple core identification and use of a hard tray, and take out, connect, and re-store any core. , The handling characteristics can be improved.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. A plurality of bundled core storage trays 2 and individual core storage trays 3 capable of storing a branched core a into which an optical cable A is introduced are housed in a cabinet body 1. Tray for drawing 5,5 ₁ The core wire storage trays 2 and 3 are connected to each other by connecting a core wire lead-in / out portion 11 for guiding optical fiber wires and a core wire coming in from the core wire lead-in / out portion 11. It is provided with a connection part storage part 12 for storing and a core length storage part 13 for winding and storing the core length, and a plurality of the core part storage parts are stacked.
The core storage trays 2 and 3 are connected to each other so as to be openable and closable by a hinge part 4 in a multi-layered state, to form a set, and a connection part and a core excess length are individually set for each single core branched from the core a. The core storage trays 2 and 3 are drawn through a base plate 10 provided in the cabinet main body 1 so as to collectively store the core storage trays. ₁ Installed via In this case, the collective core wire storage tray 2 has an upper tray 2 ₁ For example, a 4-core batch storage tray is provided, and the lower tray 2 ₂ The upper and lower layers are connected to each other by a hinge portion 4 so as to be freely openable and closable by a hinge portion 4. ₁ For example, a single-core individual storage tray is provided, and the lower tray 3 ₂ The upper and lower layers are connected in a freely openable and closable manner by the hinge portion 4 to form a set, and the connection portion and the extra length of the core wire are collectively or individually stored for each single core or multiple cores branched from the core. And a plurality of layers of the collective core wire storage tray 2 and the individual core wire storage tray 3 are provided at a central end of the cabinet body 1 for storing the lead-in line and the branch line. The optical fiber cable is separated and arranged on the left and right sides of a central passage for introducing an optical cable, and cable grippers 6 and 6 are arranged on the central passage.
[0013]
In this case, the upper and lower trays 2 of the four-core batch storage tray 2 ₁ , 2 ₂ Is provided with a locking member, for example, a locking uneven portion, and is detachably mounted. ₁ , 2 ₂ Are connected inside the cabinet body 1 as a collective core wire tray 2 having a multilayer structure in which the core wire connection opening and closing are connected by a hinge portion 4 to form a core wire connection storage case. For example, a case where the four cores are separated into single cores, or a connection part converted into a single core using separated cores and a spare length are stored, and the individual core storage tray 3 has the same configuration.
[0014]
The collective core wire storage tray 2 and the individual core wire storage tray 3 are formed of a core wire tray of a molded product integrally formed of a synthetic resin, and have a substantially rectangular shape as shown in FIGS. The upper and lower layer trays 2 are formed in the same shape on the inner surface side. ₁ , 2 ₂ Or 3 ₁ , 3 ₂ In a state in which are stacked, they are inserted into mounting portions 21 provided on the lowermost tray, for example, locking bosses, and are detachably fixed to the base plate 10 via locking pieces 22 provided on the drawing-in tray 5. The hinge portions 4 of the core wire storage trays 2 and 3 are arranged side by side in the cabinet main body 1 with a central passage interposed therebetween.
[0015]
As shown in FIG. 3 to FIG. 7, the core storage tray 2 is a collection of core storage trays 2 of a four-core collective storage type of cores. A lead-in / out portion 11, a connection portion storage portion 12 in which a connection portion connecting the core wires entering from the core lead-out portion 11 is stored and held, and a core drawn out from the connection portion held in the connection portion storage portion 12. A substantially rectangular tray is used, which is provided with a core excess length storage portion 13 which is wound around a wire length and wound and held in a loop shape, and is partitioned by a rib 14 and a core wire locking piece 15.
Further, the core storage trays 2 and 3 are provided so as to be freely inserted into and removed from a draw-in tray 5, for example, a tray serving also as a bracket-shaped base plate, in the frame 10 fixed in the cabinet body 1. Is mounted horizontally in the direction in which the upper surface is set as the upper surface, and the core connection portion and the extra core length can be collectively stored or individually stored, and a protective sheet is provided on the upper surfaces of the core storage trays 2 and 3 as necessary. (Not shown) is detachably fitted.
[0016]
Upper and lower layer trays 2 of these core wire storage trays 2 and 3 ₁ , 2 ₂ Or 3 ₁ , 3 ₂ The upper and lower layer trays 2 are provided with substantially cylindrical or elliptical cylindrical ribs 14 protrudingly arranged on the tray bottom surface so as to be capable of winding by increasing the radius of curvature of the core wire. ₁ , 2 ₂ Or 3 ₁ , 3 ₂ May be connected via a mounting hole or a detachable hinge portion 4, and may be inserted into and removed from a mounting portion 17 formed at an internal position surrounded by the rib 14 to mount a mounting screw or a nip latch. The upper and lower layer trays are preferably detachably fixed by the tool 16.
[0017]
A plurality of the core wire storage trays 2 and 3 are introduced and fixed into the cabinet main body 1 in a state where the optical cable A is connected and wired by the connection portion, and a cable gripper for holding the cable of the optical cable A and a tension member. 6 and a floor cable gripping tool 7. The cable gripping tool 6 faces a plurality of cable routing holes arranged in parallel at equal intervals in the cabinet body 1 and is provided with a locking piece or a tightening screw. The optical cable A is fixed to the base plate 10 detachably so as to be easily clamped and fixed.
Further, the core storage trays 2 and 3 are replaced with the core storage trays 2 or the individual core storage trays 3 in parallel, respectively, and the core storage trays 2 and 3 are replaced to collectively store the cores. The cabinets can be easily used in the form in which the trays 2 are arranged side by side and the individual core wire storage trays 3 are arranged side by side.
[0018]
Further, the replacement of the core wire storage trays 2 and 3 is performed by using the draw-through trays 5 and 5. ₁ Can be slid from the base plate 10, a spacer (not shown) is provided on the base plate 10, and a gap is fixed on the back side of the base plate 10, and each mounting plate is attached to the back surface of the base plate. The locking piece of the component is slid and moved underneath.
In this case, the base plate 10 is provided with the draw-in trays 5,5. ₁ Notch hole 20 having a larger area than locking piece 22 protruding from ₁ And the notch hole 20 ₁ Notch hole 20 for slide that communicates with ₂ A mounting hole 20 having an opening is formed facing the base plate 10, and a gap (not shown) is opened in the back side of the base plate in the cabinet main body 1, and the locking piece 22 slides under the back surface of the base plate 10. It is preferable to move the core storage trays 2 and 3 so that the core storage trays 2 and 3 can be detached and attached with one touch without using screws or the like in a mounting relationship with the base plate 10.
The mounting holes 20 are provided so as to be opposed to each other in a pair. ₁ Also, the floor cable gripper 7 for gripping a floor cable, a drop cable, a termination cable, or the like is provided with a locking piece on each body and is detachably disposed at a predetermined position in the same manner as described above. Each wiring process can be performed.
[0019]
A plurality of blocks of the collective core storage tray 2 and the individual core storage tray 3 are separated from each other by a central passage for introducing an optical cable from a central end of the cabinet body 1 for storing a lead-in line and a branch line. When the core storage trays 2 and 3 are opened on both sides, the wiring operation can be performed by opening the core storage trays 2 and 3 on both sides, and the wiring can be easily arranged in a tidy manner. By disposing the cable gripper 6 on the central passage, the processing of the pull-in cable is performed in the center, and the processing of the pull-down cable B is performed on both sides by using the core wire storage trays 2 and 3. ₁ In addition, since the processing of the individual core wires for addition can be performed by the floor cable gripping tool 7, the wiring arrangement can also be neatly performed.
[0020]
The cabinet body 1 is formed by injection molding of a synthetic resin or the like, is provided with a cover 9 or a cover case which can be opened and closed or is detachable, and has a routing hole for introducing the optical cable A therein. Cable grommets 26 are fitted, and optical cables are respectively drawn in and out therefrom so that the optical cables A can be fixed by the cable gripper 6. is there.
[0021]
In the storage cabinet for an optical cable connection portion according to this embodiment, when connecting the branch optical cable and the optical cable A, the cabinet body 1 is fixed to the outer wall surface of the building with a screw or the like, and the branch optical cable is connected to the branch optical cable. Pass the cable through the routing hole, and put the extra core length of each branch optical cable lead-in cable into the core storage trays 2 and 3. If there is a storage core, add it to the storage core storage sheet or other parts as necessary. You just have to put it in and keep it.
Then, the cabinet body 1 is covered with the cover 9 of the lid case to keep the lid closed, but the wiring processing work such as dropping and adding the optical cable A and switching replacement is performed from the stripped portion of the cable sheath in the handling of the core wire. It can be made simple and the recognizability can be remarkably easily made in a wiring form that can be seen at a glance.
[0022]
A plurality of comb-shaped partition plates standing up at a predetermined interval or a group of supporting rods standing up at an interval are provided in the connection portion storage section 12 for storing the core wire connection section in the core wire storage tray 2. From the top to the gaps formed between the partition plates. It is designed to be supported by being inserted vertically. In addition, the core excess length storage portion 13 is provided with a core engagement piece 15 in an appropriate position in a plurality of extra length pockets divided by a partition plate such as a rib 14 so as to help prevent the core from jumping out. Good to do.
[0023]
In addition, the connection portion storage portion 12 and the excess core length storage portion 13 may be defined by selecting guide ribs or side walls as necessary, or may be a core wire locking piece 15 for preventing floating of the core wire or a core wire. The retainer is formed integrally so that the extra length of the core wire or the core wire connection portion can be securely held in the core wire storage tray 2 or only the connection portion storage portion 12 or the core length extra storage portion 13 is partitioned. The core storage trays 2 may be combined into a single form. The cores may be separated and stored for each core storage tray 2, and the fiber core from the cable insertion portion may be bent with a minimal amount. A twist can be prevented, and high reliability can be obtained by safe and high-density storage.
[0024]
Upper and lower layer trays 2 of this core wire storage tray 2 ₁ , 2 ₂ As shown in FIG. 6, for example, a pin 4 ₁ And pin bearing 4 for pin insertion ₂ And a pair of upper and lower trays 2 ₁ , 2 ₂ , One upper tray 2 ₁ Pin 4 of ₁ The other lower tray 2 ₂ Pin bearing part 4 ₂ Insert into the upper and lower layer tray 2 ₁ , 2 ₂ Are rotatably connected to each other, and a pair of pins 4 ₁ Denotes a long shaft pin and a short shaft pin, and a pin bearing portion 4 into which the short shaft pin is inserted. ₂ Has a guide groove 4 for pin insertion ₃ The core wire storage trays 2 are rotatably and detachably connected to each other, and are arranged in a vertically multi-tiered manner.
A locking claw 18 and a locking receiving portion 19 for detachably connecting the adjacent core wire storage trays 2 and 2 are provided corresponding to both side walls of the core wire storage tray 2, and the hinges are further provided. The opposite side of the portion 4 is supported so that the adjacent core wire storage trays 2, 2 do not come off from each other when they are stacked at the locking portion. In this case, the upper side of the desired core storage tray 2 can be opened from the multi-tiered core storage tray 2 to open the overlapping surface, and the inner side of the lower core storage tray 2 can be opened. The work of connecting and connecting the exposed cores, that is, the inspection, repair, and connection of the cores in the collective core storage tray 3 can be easily performed.
[0025]
The core wire lead-in / out portion 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. Since the wire storage tray 2 is formed in a substantially square, rectangular quadrangle or elliptical shape, the core a of the core a arranged at a predetermined interval in the core extra length storage 13 adjacent to the connection storage 12. Consideration is made so that the cord can be wound and held in a smoothly curved loop shape by the locking piece 15 so that the transmission characteristics are not adversely affected. For example, the core wire storage tray 2 secures a radius of curvature of 30 mm or more and can manage and store the core wires, and can store various connection parts, such as a fusion reinforcing sleeve, a mechanical splice, and an MT connector. , Upper and lower tray 2 ₁ , 2 ₂ The core storage trays 2 are stacked in four layers and provided so as to be openable / closable or removable for each core storage tray, so that the excess core length and the core connection portion can be stored collectively. In this case, one of the core wire storage trays 2 may have a structure in which the connection portion is not fixed, and may have a degree of freedom in absorbing the core wire length, or one tray may have 40 cores (four-core tape 10). If the identification holder is used and the identification holder is used, it is possible to realize a form in which the core wire can be identified in units of 20 fibers.
[0026]
The collective core storage tray 2 and the individual core storage tray 3 are connected to the draw-in trays 5, 5. ₁ Trays 5, 5 for lower trays at the bottom of the stack ₁ As a configuration for engaging and disengaging the attachment portion of the ₁ Locking pieces 22 projecting in two or more different directions can be inserted into and removed from mounting holes 20 formed in the base plate 10 fixed in the cabinet body 1 and slidably slid under the base plate 10. Installing. A locking concave / convex portion is provided on the inner portion or the bottom portion of the core wire storage tray 3 for storing the individual core wires, and a knob 25 is protruded from an outer portion of the core wire storage tray 3 to form a hole to be fitted into the knob 25. Of the upper and lower layer trays 3 ₁ , 3 ₂ Can be fixed.
In the cabinet main body 1, an optical cable A is penetrated from a central passage and fixed by a cable gripper 6, and a tension member of the cable is connected and connected to a tension member gripping bracket.
[0027]
In the core storage tray 2 having the above configuration, as shown in FIG. 1, the optical cable A is gripped by the cable gripper 6 in the central passage, and the core a is one of the cores of the core tray 2. When entering from the entry portion 11, it passes through the core wire passage and is pushed by the core wire locking piece 15, and enters one of the excess core length storage portions 13. When these cords a enter the extra cord storage section 13, they pass through extra length passages formed by the ribs 14 and the cord locking pieces 15. The core wire a is pressed by the core wire retaining piece retainer 15, wound around the rib 14, and connected to a connection portion or a branch portion attached to the connection portion storage portion 12, and connected. The core a coming out of the section passes through the extra core storage section 13 and goes out of the tray from the other core lead-in / out section 11.
[0028]
In addition, when the core wire a is inserted from one side of the core wire lead-in / out portion 11 and is stored in the core excess length storage portion 13, which side of both the core wire lead-in / out portions 11 depends on the winding method of the core wire a. Can also be issued.
As described above, the core a can be inserted into the core tray 2 from any of the core lead-in / out portions 11, and the entrance of the core a can be reduced without reducing the curvature of the core a (without applying an overload). The same or different core lead-in / out part 11 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.
[0029]
And the core wire storage trays 2, 2 ₁ Are connected to each other by a hinge portion 4, and are mounted on the draw-in tray 5 in the cabinet body 1 so as to be sequentially stacked. In this stacking, it is fixed by a band, a pin, or a support rod, and the overlapping core connection storage trays can be stacked and connected without screwing or the like, and a core connection cabinet having a high-density storage structure can be obtained. .
In this case, the core a is inserted from one core lead-in / out part 11, the connection part is held in the connection part storage part 12, wound around the central rib 14, taken out from the other core lead-in / out part 11, and wired. Alternatively, a wiring form is adopted in which a core a is inserted from one core lead-in / out part 11 to hold the connection part, the extra core is routed to the excess core storage part 13, and is taken out from the other lead-in / out part 11. This can be performed for each of the core storage trays 2 and arranged in the cabinet body 1 so that the core can be branched into a single core and pulled down.
[0030]
As described above, when the core a is inserted from one side of the core lead-in / out section 11, when the core a is stored in the core excess length storage section 13, the core a can be put out to the other lead-in / out section 11 side. In addition, when the core wire a is inserted from one side of the core wire lead-in / out portion 11 and is stored in the core excess length storage portion 13, which side of both the core wire lead-in / out portions 11 depends on the winding method of the core wire a. Can also be issued.
As described above, the core wire a can be inserted into the core wire storage tray 2 from any of the core wire lead-in / out portions 11, and without reducing the curvature of the core wire a (without overloading). The same core lead-in / out part 11 as the entrance-side lead-in / out part 11 can be taken out as the outlet side. Thereby, the entrance / exit side of the core wire can be freely selected, and the wiring of the core wire in the optical cable cabinet can be facilitated.
[0031]
In another embodiment of the present invention shown in FIG. 10, the cabinet body 1 is provided with a key member 27 having a key receiving member 28 in a cover 9 or a lid case provided in a freely openable / removable manner, and a cable routing hole. A cable grommet 26 is fitted therein, and optical cables are respectively led in and out of the cable grommet 26 and fixed by the cable gripper 6. The cable grommet 26 is configured in the cabinet body 1 for dustproof, waterproof, and security.
[0032]
【The invention's effect】
The present invention provides a core storage tray, wherein the trays are openably and closably connected to each other by hinge portions in a state where the trays are overlapped with each other in a stacked state, and a single core or a plurality of cores branched from the core are connected to the connection part. A plurality of layers of collective core wire storage trays or individual core wire storage trays capable of individually storing the extra wire length collectively, and a plurality of blocks of the collective core wire storage tray and the individual core wire storage tray are provided with a lead-through line. In order to store the branch line, the optical fiber cable is introduced separately from the central end of the cabinet body at the central end where the optical cable is introduced. It is simple and can be easily stacked in multiple layers.Moreover, when the cable is pulled down, the multiple core trays have a bad influence on the transmission characteristics of the optical cable from the core lead-in / out part. Optical fiber connection and switching, branch connection and re-storage work can be easily performed without having to use multiple cables. It is easy to increase and decrease the number of connections, and it is easy to expand the connection.The connection part can be stored safely in a very compact manner, so after opening the core, open any storage tray and quickly pull out the stored optical fiber core. It can be dropped, the core can be easily identified, the connection can be easily readjusted and repaired, and the workability can be greatly improved, and each core tray can be stacked as many as necessary. In addition, the storage trays stacked in multiple stages can be properly held and safety can be improved.
[0033]
Further, according to the present invention, there is provided an individual storage tray having a plurality of cores so that the storage of the drawn-down core wire can be easily accommodated, and there is also room for winding and storing the core wire, and the core wire is also held in a buffered manner. Since the cores are not loosened, the cores can be safely stored in each core storage tray, and the length of the extra length of the stored optical fiber even if each core storage tray is expanded. , The change in the length of the extra length of the optical fiber is also small, and the optical loss can be eliminated without causing unnecessary bending or small arcs in the optical fiber core wire, thereby maintaining good transmission characteristics. .
[0034]
Further, according to the present invention, a plurality of blocks of the collective core storage tray and the individual core storage tray define a central passage for introducing an optical cable from a central end of the cabinet body to store the lead-in line and the branch line. Since they are separated and arranged on the left and right, each core storage tray can be opened on both sides, wiring work can be done, wiring can be handled neatly, and replacement of core storage trays is easy and extension work is also easy In addition, the cable can be processed in the center, and on both sides of the cable can be processed using the individual cable storage trays. When branching or pulling wires, there is a degree of freedom in drawing and inserting the core wires into the collective core tray, so that access to the core wire connection part can be simplified, and management and assembly and disassembly work can be performed easily. High-density, high-reliability, and a core connection part that can be easily and reliably connected and easily identified without the core storage trays that are stacked in multiple levels as necessary As a cabinet, safety is greatly improved, high reliability is obtained by storing the extra length of the core wire, handling is greatly simplified by attaching and detaching the core storage trays, and compactness and cost reduction are achieved. Can contribute.
[Brief description of the drawings]
FIG. 1 is a plan view showing a use state of an embodiment of the present invention, in which a cover is partially cut away to show the inside.
FIGS. 2A and 2B are side views of the example of FIG. 1, wherein FIG. 2A is a right side view thereof, and FIG.
3A and 3B show a single-core connection storage case used in the example of FIG. 1, wherein FIG. 3A is a plan view, FIG. 3B is a front view, FIG. 3C is a right side view, and FIG. FIG.
FIG. 4 is a plan view illustrating a separated state of the stacking tray of the example of FIG. 3;
FIG. 5 is a longitudinal sectional view taken along line AA in FIG. 4;
6A and 6B show the upper tray of the core wire tray shown in FIG. 4, wherein FIG. 6A is a side view, FIG. 6B is a longitudinal sectional view taken along line BB of FIG. 4, and FIG. FIG. 4D is a longitudinal sectional view taken along line C-D, and FIG.
7A and 7B show some details of the example of FIG. 4; FIG. 7A is an enlarged plan view of a connection portion housing portion, FIG. 7B is a longitudinal sectional view taken along line EE, and FIG. And (d) is a longitudinal sectional view taken along line GG.
8A and 8B show a multi-core storage tray used in the embodiment of the present invention, wherein FIG. 8A is a plan view, FIG. 8B is a front view, FIG. 8C is a right side view, and FIG. FIG.
9A and 9B show a base plate used in the embodiment of the present invention, wherein FIG. 9A is a plan view and FIG. 9B is a front view.
10A and 10B show another embodiment of the present invention, in which FIG. 10A is a plan view showing the inside of a cover with a part cut away, FIG. 10B is a front view thereof, and FIG. FIG.
[Explanation of symbols]
A Optical cable
B withdrawal cable
a core wire
1 cabinet body
2 Collective core wire storage tray
2 ₁ Upper tray
2 ₂ Lower tray
3 Individual core wire storage tray
3 ₁ Upper tray
3 ₂ Lower tray
4 hinge part
4 ₁ pin
4 ₂ Pin bearing
4 ₃ Guide kerf
5,5 ₁ Draw-through tray
6,6 ₁ Cable gripper
7 Floor cable gripper
8 Band for fixing
9 Cover
10 Base plate
11 Core lead-out section
12 Connection section storage section
13 extra length storage section
14 rib
15 cord locking piece
16 Fixture
17 Mounting part
18 Locking claw
19 Lock receiving part
20 mounting holes
21 Mounting part
22 Locking piece
25 knob
26 Cable grommet
27 key members
28 Key bracket

Claims (6)

A core wire lead-in / out portion for guiding an optical fiber core wire, a connection portion storage portion housing a core wire connection portion connecting the core wires entering from the core wire lead-in / out portion, and a core wire extra length wound and stored. A core storage tray in which a plurality of trays each having a core excess storage portion are stacked and arranged is detachably fixed in the cabinet main body through a draw-in tray,
The core storage tray is connected and opened and closed by a hinge portion in a state where the trays are overlapped in upper and lower layers to form a set, and a connection portion and a core wire extra length are provided for each single core or multiple cores branched from the core. And a plurality of layers of collective core storage trays or individual core storage trays capable of individually storing the cores individually. An optical cable connection part storage cabinet characterized in that a central passage through which an optical cable is introduced is separated from a central end of a cabinet body so as to be separated from left and right, and a cable gripping tool is disposed on the central passage. The core wire storage tray is configured to engage and disengage the lower tray at the lowermost layer stacked on the draw-in tray with the mounting portion of the draw-in tray, and project from two or more places in the draw-in tray in different directions. 2. The optical cable connection part storage according to claim 1, wherein the locking piece is detachably inserted into a mounting hole formed in a base plate fixed in the cabinet body, and is slidably attached to the base plate. Cabinet. The collective core storage tray and the individual core storage tray are provided with cylindrical or elliptical cylindrical ribs protruding from the bottom surface of the core and capable of routing the radius of curvature of the core wire to a large diameter, and provided on the ribs. 3. The optical cable connection part storage cabinet according to claim 1, wherein the upper and lower layer trays are removably fixed by being inserted into and removed from a mounting part formed at an enclosed inner position. A locking projection is provided on the inner or bottom surface of the core storage tray for storing the collective cores or the individual cores, and a knob is protruded from an outer portion of the core storage tray to fit into the knob. 4. The cabinet for storing an optical cable connection part according to claim 1, wherein the fixing band is disposed so as to be detachable. A pin and a pin bearing portion are provided as a pair of hinges on the outside of the core storage tray so as to face each other, and the pins of one core storage tray are inserted into the pin bearings of the other core storage tray. 4. An optical cable connection part storage cabinet according to claim 1, wherein the two trays are rotatably connected to each other. The base plate is provided with a mounting hole having a notch hole having a larger area than the locking piece protruding from the draw-in tray and a slide notch hole communicating with the notch hole. 6. The fixing device according to claim 2, wherein a gap is secured to the back side of the base plate in the cabinet body having the cover, and the locking piece is slid under the back surface of the base plate to slide. The cabinet for storing the optical cable connection section described in the above.

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