JPH04291207A - Optical fiber cable wiring board - Google Patents

Abstract

PURPOSE:To facilitate the connection of an optical fiber cable and to prevent damage for cords. CONSTITUTION:A connecting part storage board 7 equipped with almost circular storage parts 14 and 15 to store the fusing and connecting part of the optical fiber cable while winding it together with the excess length part is loaded on another storage shelf 3, pivotally supported at one corner part of a front edge part to the storage shelf 3, and turned with such a pivotally supporting point 8 as a center in the case of connection so as to be turned forward, and a unit line holder 19 is provided at the pivotally supporting point 8 on the connecting part storage board 7 so as to fix an optical fiber unit line 21. Then, a connector holder 25 is provided at an anti-pivotally supporting point side edge part so as to fix a connector 27 at one end of an optical fiber cord 23 to be connected. When turning out the connecting part storage board 7 in the case of connection, there is no stretching movement since the optical fiber unit line 21 is fixed at the turning center, and the stored optical fiber cable and the optical fiber cord 23 are not moved and damaged since the optical fiber cord 23 is fixed by the connector holder 25 as well.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber cable distribution frame widely used for communications and the like.

0002

[Prior Art] Conventional fiber optic cable distribution frames are
The inside of the box has multiple shelves that can be pulled out, and this shelf can be pulled out approximately 30 cm to store optical fiber cable cores and optical fiber cords (cords with connectors on one end).
The connection part, the extra length following this connection part, and the jumper cord (a cord with connectors on both ends) were placed in a rolled state, and the shelf was pushed into it.

0003

[Problem to be solved by the invention] An optical fiber cable is an optical fiber unit line in which a plurality of optical fiber cable cores (usually eight) are wrapped with an insulator, and a plurality of optical fiber cables are further wrapped together with a protector. There are two types of optical fiber unit wires: a flexible stranded wire type and a hard loose tube type.The loose tube type has excellent water resistance, but the insulating tube is hard and difficult to bend.

[0004] In the above-mentioned conventional optical fiber cable distribution frame, it is necessary to pull out the shelf wide for connection, and each time the shelf is pulled out, the optical fiber unit line branched from the optical fiber cable is pulled out. Since the optical fiber unit wire is hard and difficult to bend, the optical fiber unit wire is not pulled out, but instead the soft optical fiber cable core wire connected to the connection part is pulled, and the bending radius becomes small, which may damage the optical fiber cable core wire. However, there were problems such as problems, and workers were having a hard time trying to contain them without causing damage.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide an optical fiber that allows easy connection of loose tube type optical fiber cables, prevents damage to the optical fiber cable core, and has good workability. Our goal is to provide cable distribution panels.

[0006]

[Means for Solving the Problems] This invention has a width that leaves a vertically elongated cable passage for passing an optical fiber cable on one of the left and right ends of the inside of a box body having a door on the front, and a vertically elongated jumper cord passage on the other side. In the center of the direction, a plurality of storage shelves and jumper cord shelves lined up from side to side are arranged in the vertical direction, and a connecting part storage plate is placed on each storage shelf, and an anti-jumper cord shelf near the front end is placed on each storage shelf. The vicinity of the side end is pivotally supported on the storage shelf, and the connection part storage plate can be rotated around the pivot point and moved forward, and the optical fiber cable core and A circular inner wall for storing the optical fiber cord fusion-spliced to the core wire by winding it into a substantially circular shape, and single or double wire passing openings at suitable locations on the outside of the circular inner wall at appropriate intervals. A unit wire holder for fixing the optical fiber unit wire on the pivot point, further comprising a substantially circular partition wall projecting from the partition wall, forming a single or double circular storage section between the partition wall and the circular inner wall, and further fixing the optical fiber unit wire on the pivot point. The optical fiber cable distribution board is provided with a connector holder for holding a connector attached to one end of the optical fiber cord at the end of the connection portion storage plate on the jumper cord shelf side.

Further, a jumper cord holder capable of holding a plurality of jumper cords is provided on the upper surface of the end opposite to the storage shelf of the jumper cord shelf, and a hanging corner of the jumper cord is provided on the outside of the jumper cord holder. This is an optical fiber cable distribution frame with a downwardly curved jumper cord guide to maintain an appropriate bending radius.

[0008] Furthermore, in the optical fiber cable distribution frame, the storage shelf and the jumper cord shelf can be pulled out forward by an appropriate amount, and the jumper cord shelf can be pulled out by a larger amount than the storage shelf.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on embodiments shown in the drawings. FIG. 1 is a plan view showing an embodiment of a shelf of an optical fiber cable distribution board according to the present invention, and FIG. 2 is a front view of the same shelf, in which (3) is a storage shelf, (4) is a front view of the shelf, and (3) is a storage shelf; is a jumper cord shelf, and this storage shelf (3) and jumper cord shelf (4) are lined up on the left and right, and the inside front shown in Fig. 4 with the front door (2) of the box (1) shown in Fig. 3 opened. As shown in the figure, there is a vertical cable passage (20) on the left side of the inside of the box (1) for passing optical fiber cables (not shown).
And on the right side there is also a vertical jumper cord passage (30)
In the center of the width direction, there are many steps above and below.

The storage shelf (3) and the jumper cord shelf (4) are supported on three sides by grooves provided on the inner surface of the shelf support frames (5) and (6) bent into a gate shape. (
3) can be pulled forward by the drawer size (T1) shown in Figure 12, and the jumper cord shelf (4) can be pulled forward by the drawer size (T2) shown in Figure 13, and this drawer size is (T1) < (T2). In a relationship.

[0011] (7) is a connection part storage plate which rests on the storage shelf (3) and is pivoted (8) to the storage shelf (3) near the end of the anti-jumper cord shelf (4) near the front end; This pivot (8)
It is configured to be able to rotate around a point and move forward as shown in FIGS. 12 and 13.

[0012] On the upper surface of this storage shelf (3), as shown in Fig. 5, a circular inner wall (9) is provided protruding approximately at the center, and a concentric intermediate partition wall is provided on the outside of this circular inner wall (9). (10
) has two wide wire openings (
11) A peripheral partition wall (12) is formed to protrude to form (11), and furthermore, an outer peripheral partition wall (12) is provided on the outside of the intermediate partition wall (10) and extends outward in a spiral shape around 1/4 of a concentric circle. It protrudes and forms a wire passage opening (13) between both ends thereof.

In this way, the circular inner wall (9) and the intermediate partition wall (
between the intermediate partition wall (10) and the outer peripheral partition wall (12)
), an approximately double circular inner circumferential storage portion (14) and an outer circumferential storage portion (15) are formed between the two.

(16) is a wire restraint, and the outer peripheral partition wall (12)
and one end is fixed to the upper end of the intermediate partition wall (10), and the tops of the outer circumferential storage part (15) and the inner circumferential storage part (14) are partially covered, and four inner circumference storage parts are attached to the outer circumferential storage part (15). Peripheral storage section (1
4) It is made up of thin plastic plates installed in two places on the top and prevents the wires passing through the outer circumference storage part (15) and the inner circumference storage part (14) from jumping up and flying out when storing the wires. As shown by the virtual line in Fig. 7, line restraint (16)
By pressing from above, it is curved downward and stored.

Also, between aa and a of the part of the intermediate partition wall (10) shown in FIG. 5 and a part of the outer peripheral partition wall (12) between b and b, there is a lower step part (17) as shown in FIG. )(18), and the wires pass through the stepped portions (17) and (18), cross the outer partition wall (11) and the intermediate partition wall (10), and enter the inner storage portion (14) and It is designed so that it can be passed through the outer circumferential storage part (15), and multiple wires can be wound in one or multiple turns across the inner circumferential storage part (14) and the outer circumferential storage part (15). be.

[0016] (19) is a unit wire holder, which has two locations: the pivot point (8) on the connection storage plate (7) and the position near the wire passage opening (13) of the outer peripheral partition wall (12). established in
The optical fiber unit wire (21) separated from the optical fiber cable (not shown) passing through the cable passage (20) shown in FIG. 4 is clamped and fixed as shown in FIG. 9, and these two unit wire holders ( 19) Near the wire passing opening (13) past (19), the optical fiber unit wire (21) is divided into a plurality of (eight in this embodiment) optical fiber cable core wires (22).

The tip of this optical fiber cable (22) is connected to an optical fiber cord (23) with a connector at one end.
) is fusion spliced to the opposite end of the connector via a fusion reinforcing material (24), and together with this fusion reinforcing material (24), the optical fiber cable core (22) and the optical fiber cord (2
3) is wound into the outer circumference storage part (15) and the inner circumference storage part (14) through the wire passage opening (11).

(25) is a connector holder, which is provided on the upper surface of the end of the connection storage plate (7) that approaches the jumper cord receiving shelf (4), and has eight holding grooves (25a) as shown in FIG. are arranged in a row, and the connector (27) of the optical fiber cord (23) is held in this holding groove (25a), and is provided with a removable holding plate (25a) that closes this holding groove (25a).

FIG. 6 shows another embodiment of the connection storage plate (7), which is different from the connection storage plate (7) of FIG. Inner wall (9a)
It has a slightly larger diameter and a single storage part (14a), and a plurality of wires are wound into this storage part (14a) one or more times at a time.

The jumper cord shelf (4) has eight holding grooves (2) shown in FIG. 11 on the upper surface of the end opposite to the storage shelf (3).
8a) in parallel with the jumper cord holder (28
) and this jumper cord holder (
28) is provided with a downwardly curved jumper cord guide (29), and as shown in FIG. Jumper cord holder (28)
In order to prevent damage caused by small bending of the corners when the object once held is hung between the box body (1) and the jumper cord holder (4), a safe bending radius must be maintained. It is something.

[0021] In the above configuration, the optical fiber cable (not shown) is connected to the cable path (20) of the box (1).
The optical fiber unit lines (21) are introduced into a plurality of optical fiber unit lines (21), and one unit is drawn into each storage shelf (3), and as shown in FIG. It is held by a unit wire holder (19), and is divided into a plurality of optical fiber cable cores (22) (eight in this embodiment) near the wire passing opening (13).

In order to connect this optical fiber cable (22) to the opposite end of the optical fiber cord (23), as shown in FIG. Part storage board (
7) is fully moved forward so that the upper and lower storage shelves do not interfere, and the tip of the optical fiber cable core (22) and the connector (27) at one end are held in the connector holder (25). Connect the end of the optical fiber cord (23) without the connector with the fusion reinforcing material (
24) using a fusion tool. When the fusion splice is completed in this way, it is rolled up and stored in the outer circumference storage part (15) and the inner circumference storage part (14) in the state shown in Fig. 1, and then the connection part storage plate (7) is rotated and the storage shelf is (3)
After returning to the top, push in the storage shelf (3) to finish.

Next, in order to connect the jumper cord (26) to the optical fiber cord (23), as shown in FIG. While keeping it in a state where it does not interfere with the storage shelf, pull out the jumper cord shelf (4) fully forward. At this time, there is no need to pull out the storage shelf (3). Next, as shown in Figure 1, connect the connector (27) at one end of the jumper cord (26), which has connectors at both ends, to the optical fiber held in the connector holder (25), which is rolled and placed on the jumper cord shelf (4). Connect the adapter (31) to the connector (27) of the cord (23).
). When the connection is completed in this way, the connecting portion storage plate (7) is rotated to return to its original position, and the jumper cord shelf (4) is pushed in to return to its original position.

The jumper cord (26) is held in the jumper cord holder (28) at its midpoint, and the other end is once suspended in the jumper cord passageway (30) along the jumper cord guide (29), and then placed on another jumper cord shelf. (4) and held in the jumper cord holder (28) in the same way as above, then wrap the extra length and place it on the jumper cord shelf (4), and connect the other end connector (
27) to the connector (2) of the optical fiber cord (23).
7) via an adapter (31).

Note that in FIG. 1, only one connection between the optical fiber cable (22), the optical fiber cord (23), and the jumper cord (26) is shown to avoid complication; Eight wires are connected to each other.

[0026]

[Effects of the Invention] According to the present invention, when changing the connection of an optical fiber cable, the connecting part storage plate is rotated and moved forward, so that the storage shelf only needs to be pulled out by a small amount. Therefore, there is no need to bend and store the long excess length of the optical fiber unit wire for pulling out, which makes it possible to use a loose tube type optical fiber cable that is difficult to bend, and also allows the optical fiber unit wire to be pulled out as much as possible. is fixed by a unit wire holder at the center of rotation, and the optical fiber cord connected to the optical fiber cable core is fixed by a connector holder at the end of the connection storage plate, so the connection storage plate cannot be rotated. When the fiber optic cables and the optical fiber cords on the connection storage plate are moved forward by the connector, they are not pulled or pushed, which prevents damage to the optical fiber cables, which are easily damaged when bent slightly. In addition to being able to do this, it also has a fixed storage location for cords, making it extremely easy to work with.

Furthermore, since the jumper cord guide is provided at the end of the jumper cord shelf, it is possible to maintain an appropriate bending radius to prevent damage to the jumper cords when they hang down, thereby preventing damage to the jumper cords.

[Brief explanation of drawings]

FIG. 1 is a plan view of a storage shelf and a jumper cord shelf, which are essential parts of an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1 viewed in the direction of arrow P.

FIG. 3 is a front view of the box of the present invention.

4 is an internal front view of the box shown in FIG. 3 with the door opened; FIG.

FIG. 5 is a plan view of the connection portion storage plate in FIG. 1;

FIG. 6 is a plan view showing another embodiment of the connection portion storage plate.

FIG. 7 is an enlarged sectional view taken along line A-A in FIG. 5;

FIG. 8 is an enlarged sectional view taken along line BB in FIG. 5;

9 is an enlarged sectional view taken along line CC in FIG. 1. FIG.

FIG. 10 is an enlarged sectional view taken along line DD in FIG. 5;

FIG. 11 is an enlarged sectional view taken along line E-E in FIG. 1;

[Fig. 12] A storage shelf and a jumper cord shelf when connecting optical fiber cables and optical fiber cords,
FIG. 3 is a plan view showing the positional relationship of the connection portion storage plates.

FIG. 13 is a plan view showing the positional relationship between a storage shelf, a jumper cord shelf, and a connecting portion storage plate when connecting an optical fiber cord and a jumper cord.

[Explanation of symbols]

1 Box body 2 Door 3. Storage shelf 4 Jumper cord shelf 7 Connection storage plate 8. Central branch 9. Circular inner wall 10 Intermediate partition wall 11 Wire passage opening 12 Peripheral partition wall 13 Wire passage opening 14 Inner storage area 15 Outer storage area 19 Unit wire holder 21 Optical fiber unit line 22 Optical fiber cable core 23 Optical fiber cord 24 Fusion reinforcement material 25 Connector holder 26 Jumper code 27 Connector 28 Jumper cord holder 29 Jumper code guide T1 Storage shelf drawer dimensions

Claims (3)

[Claims] [Claim 1] A plurality of storage shelves and jumper cord shelves lined up from side to side are arranged vertically inside a box body having a door on the front, and a connecting part storage plate is placed on each storage shelf. The area near the front end of the shelf opposite to the jumper cord shelf is pivoted to the storage shelf, and the connection storage plate is rotated about the pivot point so that it can be moved forward. On the top surface of the board, there is a circular inner wall for storing the optical fiber cable core and the optical fiber cord fusion-spliced to the core wire in a substantially circular manner, and one or two layers are arranged at appropriate intervals on the outside of the circular inner wall. A substantially circular partition wall having a wire passage opening at a proper location is protruded to form a single- or double-circular storage section between the partition wall and the circular inner wall, and further above the pivot point. A unit line holder is provided to fix the optical fiber unit line to the unit line, and a connector holder for holding the connector attached to one end of the optical fiber cord is provided at the end of the connection part storage plate on the jumper cord shelf side. Features: Optical fiber cable distribution board. 2. A jumper cord holder for holding jumper cords is provided on the upper surface of the end opposite to the storage shelf of the jumper cord shelf, and a bending radius of the hanging corner of the jumper cord is provided on the outside of the jumper cord holder. 2. The fiber optic cable distribution frame according to claim 1, further comprising a downwardly curved jumper cord guide for properly maintaining the fiber optic cable distribution frame. [Claim 3] The storage shelf and jumper cord shelf include:
2. The optical fiber cable distribution board according to claim 1, wherein the jumper cord shelf can be pulled out forward by an appropriate amount, and the jumper cord shelf is larger than the storage shelf.