JPH0763923A - Wiring switching panel for optical fiber cable - Google Patents

Abstract

PURPOSE:To provide a small sized wiring switching panel for optical fiber cable capable of facilitating work for housing a remainder and switching a wiring and increasing packaging density. CONSTITUTION:A pair of supports 17a, 17b is erected in parallel to each other on both side parts in a panel main body 4 and the outer corner parts of trays 7a, 7b for housing core wire remainders are independently and freely rotatably supported by the supports 17a, 17b, respectively. Guide members 13, 13 extensible back and forth are formed in multiple stages in the middle part of the panel main body 4 and trays 8 for housing cord remainders are supported freely slidably by the guide members 13.

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 wiring switching board used in an optical fiber communication system, and more particularly to a wiring switching board installed between an optical line and an optical terminal device. is there.

[0002]

2. Description of the Related Art Generally, central equipment (main station) and terminal equipment
When transmitting signals (information) such as video and audio to (division), form a signal transmission path between these devices. Particularly, in recent optical fiber communication systems, optical fiber cables (optical lines) with high density are applied as signal transmission lines.

By the way, in the optical fiber communication system, when the distribution connection or the line switching is performed between the wiring optical fiber cable on the terminal equipment side and the high density optical fiber cable, it is necessary to have an extra length used for the work. There are many constraints, such as the curvature during bending does not become too small to prevent an increase in loss. Therefore, conventionally, in order to facilitate such work, a wiring switching board is provided between the high density optical fiber cable and the wiring optical fiber cable.

FIG. 4 shows the internal structure of a conventional optical fiber cable wiring switching board 1, and FIG. 5 shows a view taken along the line AA. In this wiring switching board 1, a densified optical fiber cable 2 and a plurality of wiring optical fiber cables 3, 3 ... Are introduced from below into a substantially box-shaped board body 4. A large number of fiber core wires 5 and 6 are drawn out from the ends of both optical fiber cables 2 and 3, and these fiber core wires 5 and 6 are patch cords (optical cords with connectors at both ends) at appropriate height positions. 9 and the optical connectors 10, 10. On both sides of these connector connecting portions, core extra length storage trays 7a and 7b for accommodating the extra lengths of the fiber cores 5 and 6 are respectively installed in multiple stages. Further, a cord extra length storage tray 8 for accommodating the extra length of the patch cord 9 is similarly installed in multiple stages in the middle of both connector connecting portions, whereby the core wires 5, 6 are provided.
Also, the extra length storage work and the connection work of the cord 9 are simplified. Reference numerals 11 and 11 denote mounting panels provided between the cord extra length storage trays 7a and 7b and the cord extra length storage tray 8. The optical connectors 10 are provided on the mounting panels 11 at intervals in the vertical direction. Retained.

[0005]

However, in the above-mentioned conventional wiring switching board 1, the storage trays 7a, 7a are
Since b and 8 are fixedly provided in the board body 4, when storing the extra length on the predetermined storage trays 7a, 7b and 8, first, a predetermined space is provided in the space in front of the trays 7a, 7b and 8. After taking extra length with the curvature of, the upper trays 7a, 7
Since it is necessary to insert it from the gap between b and 8, there is still a problem that the extra length storage work is complicated. In addition, if the storage trays 7a, 7b, 8 are fixed to the panel body 4, the lines other than those required when connecting or switching the lines may interfere with the work and impair the workability.

On the other hand, the size of the gap between the upper and lower storage trays 7a, 7a (or 8, 8) is determined by the extra length of the core wire 5.
It is necessary to have a size larger than the binding diameter of cord (or cord 9) and to be able to store it with a human fingertip.
For this reason, the gap between the trays 7a, 7a (or 8, 8) cannot be reduced, and it becomes impossible to store a high-density extra length, and the panel itself becomes large, which is disadvantageous in terms of price and installation work. In addition, the distance between the storage trays 7a and 7b and the connector connecting portion also needs to be large so as not to hinder the insertion / removal work of the optical connector 10, which also leads to a reduction in mounting density and an increase in size of the structure. Was there.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art, to easily carry out extra length storage work and line switching work, and to be small in size, and to increase the packaging density. It is to provide a wiring switching board.

[0008]

In order to achieve the above object, the present invention provides a core extra length storage tray for accommodating extra lengths of fiber cores on both sides in the main body of the board. In a wiring switching board for optical fiber cables in which cord extra length storage trays for accommodating extra lengths of patch cords are respectively provided in multiple stages, the outer corners of the core extra length extra storage trays are provided as columns upright in advance. Each of them is independently rotatably supported, and both side portions of the extra cord length storage tray are independently slidably supported by guide members extending in the front-rear direction.

The wiring switching board further includes biasing means for returning the cord extra length storage tray and the cord extra length storage tray to their initial positions, and a tray for keeping these trays stationary at a predetermined rotation angle and withdrawal amount. And stationary means.

[0010]

According to the above structure, the corners of the cord extra length storage tray are supported by the columns so that the cord extra length storage tray can be independently rotated toward the front and the cord extra length storage tray can be slid in the front-rear direction. Any tray can be pulled out from the stacked storage trays. Therefore, when the extra length storage operation is performed, it is only necessary to take the extra length of the core wire or the cord with a predetermined curvature on the pulled-out storage tray, and the extra length storage operation can be performed extremely easily. Moreover, since the line connection and switching work can be performed without being disturbed by other lines, these works are extremely easy.

Further, by pulling out a predetermined storage tray toward the front side and storing the extra length, it is not necessary to insert an extra length from the gap between the trays as in the conventional case, and the gap between the upper and lower trays can be reduced. The packaging density can be increased.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan sectional view showing a wiring switching board for an optical fiber cable according to this embodiment. In the figure, reference numeral 4 is a board body formed in a substantially box shape, and an opening 4a for carrying out extra length storage work and the like is formed on the front surface of the board body 4. In the same manner as in the conventional case, core extra length storage trays 7a and 7b for accommodating the extra lengths of the fiber cores 5 and 6 are respectively provided on both sides in the board body 4 in a multi-stage shape with vertical intervals. In the central portion of the board body 4, a cord extra length storage tray 8 for accommodating the extra length of the patch cord 9 is also provided in a multi-tiered manner.

The cord extra length storage tray 8 is slidably supported by a pair of cylindrical shafts (guide members) 13 and 13 extending forward from a mounting base plate 12 installed in the board body 4. The tray 8 can be pulled out to the front. That is, as shown in FIG. 2, on the front surface of the mounting base plate 12, a pair of cylindrical shafts 13, 13 are mounted in a multi-step manner at intervals in the vertical direction. The shafts 13 of each stage are
Sliders 14 and 14 attached to both sides of the tray 8 are fitted around the shafts 13 and 13 at predetermined intervals in parallel with each other.

As shown in FIG. 1, a flange-shaped stopper 15 for preventing the tray 8 from falling is integrally formed at the tip of the cylindrical shaft 13, and the outer periphery of the cylindrical shaft 13 is
A compression coil spring 16 (biasing means) is mounted. The coil spring 16 is interposed between the slider 14 and the stopper 15 and constantly biases the tray 8 toward the retracting side. On the other hand, the slider 14 incorporates a tray stationary means (not shown) for stationary the tray 8 at a predetermined drawing position. As the tray stationary means, for example, an adjuster bolt is used, and when the tray 8 is pulled out to a predetermined position, the adjuster bolt enters a groove or hole formed on the shaft 13 and resists the urging force of the spring 16. The tray 8 can be stationary.

The cord extra length storage trays 7a and 7b are provided with columns 17a and 17 which are erected in front of the mounting base plate 12.
It is rotatably supported by b so that any of the trays 7a and 7b can be pulled out to the front independently. That is, columnar columns 17a and 17b are erected parallel to each other on both front sides of the mounting base plate 12, and the core wire extra length storage tray 7 is attached to these columns 17a and 17b.
The outer corners of a and 7b are rotatably supported. As shown in FIG. 3, collars 18b are attached to the outer corners of the cord extra length storage trays 7a and 7b. The collars 18b are fitted to the columns 17a and fixed to the columns 17a from above and below. By being held by the collars 18a and 18c, the tray 7a can be rotated about the support column 17a.

Incidentally, these extra core length storage trays 7a, 7
Similarly to the above, the supporting portion of b also incorporates a biasing means such as a wire spring and a tray stationary means such as an adjuster bolt, and the tray 7a is set at a preset angle (30
The tray 7a can be stopped against the urging force when the tray 7a is rotated to the front.

According to the wiring switching board having the above-mentioned structure, the cord extra length storage trays 7a, 7b and the cord extra length storage tray 8 can be independently pulled out to the front, so that they are stacked in multiple stages during the extra length storage work. The optional trays 7a, 7b, 8 are pulled out from the storage trays 7a, 7b, 8 and the cords 5, 6 or the cord 9 are taken to have an extra length on the pulled-out trays 7a, 7b, 8 with a predetermined curvature. Then, the trays 7a, 7b, and 8 may be returned to their original positions, and the extra length storage operation can be performed very easily. In addition, line connection and switching work can be performed with the predetermined storage trays 7a, 7b,
Since it can be performed with 8 pulled out to the front, it can be easily performed without being disturbed by other lines.

Further, the tray 7a,
Since 7b and 8 are made to stand still at a predetermined angle or withdrawal amount, in this respect as well, extra length storage work can be performed easily, and there is no fear that the trays 7a, 7b and 8 will be pulled out more than necessary. Good transmission characteristics can be secured without damaging the fiber core wires 5 and 6 and the patch cord 9.

Further, since the storage trays 7a, 7b, 8 can be individually pulled out to perform the extra length storage work, it is not necessary to insert an extra length from the space between the trays as in the conventional case, and the space between the trays can be reduced. The mounting density can be significantly improved. Therefore, the panel itself can be made compact and the price can be reduced, and the installation work can be easily performed.
In particular, in this embodiment, since the extra-strand length storage trays 7a and 7b are rotated in the opposite directions, that is, the so-called double door is opened and pulled out, the distance between the trays 7a and 7b and the optical connector 10 connection portion can be reduced. Also in this respect, higher packaging density and smaller size can be achieved.

Further, whether or not the trays 7a, 7b, 8 are accommodated on the storage trays 7a, 7b, 8 with a predetermined curvature and without twisting can be easily confirmed by simply pulling out the trays 7a, 7b, 8. it can. To check the soundness of the extra length in the past, check the upper and lower storage trays 7a, 7a (or 8, 8).
It can not be said to be sufficient in terms of guaranteeing characteristics because it can be done only by visual inspection through the gaps between the two.

[0022]

In summary, according to the present invention, the following excellent effects are exhibited.

(1) According to the first aspect, any tray can be pulled out to the front from the cord extra length storage tray and the cord extra length storage tray which are mounted in a multi-step manner.
It is possible to extremely easily carry out the work of accommodating the extra length of the core wire or the cord, the connection and the wiring switching. Moreover, the gap between the upper and lower storage trays can be reduced, and the mounting occupied area can be reduced.

(2) According to the second aspect, since the storage tray is held at a predetermined rotation angle or withdrawal position, workability can be further improved, and at the same time, the core wire and the cord can be prevented from being damaged, The quality can be maintained.

[Brief description of drawings]

FIG. 1 is a partially omitted plan sectional view showing an embodiment of a wiring switching board for an optical fiber cable according to the present invention.

FIG. 2 is a front view showing a mounted state of a core extra length storage tray in a wiring switching board for an optical fiber cable.

FIG. 3 is a front view showing a mounted state of a cord extra length storage tray in a wiring switching board for an optical fiber cable.

FIG. 4 is a front view showing an internal configuration of a conventional wiring switching board for an optical fiber cable.

5 is a view on arrow AA of FIG. 4. FIG.

[Explanation of symbols]

 2 High-density optical fiber cable 3 Optical fiber cable for wiring 4 Board body 5,6 Fiber cores 7a, 7b Core extra length storage tray 8 Cord extra length storage tray 9 Patch cord 10 Optical connector 13 Cylindrical shaft 14 Slider 16 Coil spring (biasing means) 17a, 17b Strut

Claims (2)

[Claims] 1. A cord extra length storage tray for accommodating an extra length of a fiber core wire on both sides in a panel body, and a cord extra length storage tray for accommodating an extra length of a patch cord in a central portion of the panel body. In an optical fiber cable wiring switching board provided in a multi-tiered manner, the outer corners of the core extra length storage tray are independently rotatably supported by prearranged columns, and the extra cord length is stored. A wiring switching board for an optical fiber cable, wherein both sides of the tray are independently slidably supported by guide members extending in the front-rear direction. 2. A biasing means for returning each of the cord extra length storage tray and the cord extra length storage tray to an initial position, and a tray stationary means for resting these trays at a predetermined rotation angle and withdrawal amount. The wiring switching board for optical fiber cables according to claim 1, characterized in that.