JPH0439043B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wiring switching board for optical fiber cables, and more particularly to a wiring switching board for optical fiber cables used for connecting and switching between feeder cables and distribution cables. It is something.

[Conventional technology]

Generally, when transmitting signals (information) such as video and audio, a signal transmission path is formed using cables between central equipment (main station equipment) and terminal equipment (subscriber equipment). Especially in recent years, optical fiber cables have been used as such cables.

When forming the signal transmission path, a multi-core cable (that is, a feeder cable) in which a plurality of optical fiber cores are bundled into one is used from the central equipment to the vicinity of the terminal equipment. and terminal devices are connected by a single-core cable or a few-core cable (ie, a wiring cable), thereby increasing the density of the signal transmission path.

By the way, when switching between the above-mentioned feeder cable and distribution cable, it is desired that the switching, maintenance and inspection, etc., be easy.

Therefore, conventionally, for example, a wiring switching board 1 as shown in FIG. 3 has been used.

This wiring switching board 1 connects each core wire of the feeder cable 2 and a plurality of wiring cables 3 by connectors 4, and connects these connectors 4 to each feeder cable on a rectangular support plate 5. Each cable 2 is attached in parallel, and a plurality of these support plates 5 are fixed in the same plane.
Each of the connectors 4 is held in an exposed state, so that the connection between the feeder cable 2 and each distribution cable 3 can be easily handled.

[Problem to be solved by the invention]

The present invention aims to solve the following problems in the conventional technology described above.

That is, in the conventional wiring switching board 1 described above, a plurality of support plates 5 to which these connectors 4 are attached are fixed in the same plane in order to maintain the connectors 4 in an exposed state. structure, the feeder cable 2 to be connected
As the number of wiring cables 3 increases,
There is a problem in that the number of support plates 5 must be increased or the size of the support plates 5 must be increased, and as a result, the area occupied by the wiring switching board 1 increases.

Furthermore, since there was no extra length, switching work was virtually impossible.

Since the above-mentioned wiring switching board 1 is often installed in a limited space such as a manhole for laying cables or a room, there is a strong demand for solutions to the above-mentioned problems.

[Means for solving problems]

An object of the present invention is to provide a wiring switchboard for optical fiber cables that can effectively solve the above-mentioned problems remaining in the conventional technology. In this wiring switching board, a plurality of support plates 11 are attached to the left and right pillars 10 at predetermined intervals in the vertical direction so as to be swingable around the rear edge side, and each of the support plates 11
are selectively locked at two positions, an inclined position and a horizontal position, by the locking mechanism 12, and each optical fiber core wire 15 of the feeder cable 13 and the distribution cable 14 wired on the upper surface of each of the support plates 11 is , 16 are connected to each other by single-core connectors 17 and 18 on the line side and wiring side when arranged on the upper surface of the support plate 11, and the optical fiber core wire 15 of the feeder cable 13 is
The extra length 19 is divided into multiple groups and summarized for each group.
are each held by extra length holding pieces 20,
Further, the extra length portions 21 of each optical fiber core wire 16 of the above-mentioned wiring cable 14 are collectively stored in an extra length storage box 22 provided on one end of the support plate 11 so as to be freely accessible.

[Effect]

Each of the support plates 11 of the above-mentioned wiring switchboard is normally locked in an inclined position, and stacked in a multi-tiered manner with a required interval above and below. When performing work such as wiring switching, each support plate 11 located above the target support plate 11 is lifted and locked in a horizontal position to create a work space above the support plate 11.

To switch the wiring, take out the extra length 21 of the optical fiber core 16 of the wiring cable 14 to be switched from the excess length storage box 22, and connect the single-core connector 18 on the wiring side to the single-core connector 17 on the feeder side. This is done by changing the position, and then the extra length portion 21 is stored in the extra length storage box 22 again, and the support plate 11 above the support plate 11 is returned to its original inclined position to complete the switching operation.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

The optical fiber cable wiring switching board shown in the figure has a pair of left and right columns 10, 10 inside a frame 25 with an open front, and a pair of left and right brackets on each column 10, 10 at a fixed interval in the vertical direction. 27, and a large number of support plates 11 are mounted in multi-stage manner between each pair of brackets 27 via locking mechanisms 12.

In the locking mechanism 12, a mounting shaft 28 protruding from the inner surface of the bracket 27 is loosely fitted into an elongated hole 29 formed on the rear side surface of the support plate 11 and elongated in the front-rear direction.
In addition, a locking pin 3 facing outward is provided in front of the elongated hole 29.
0 is set protrudingly.

At the front edge of the bracket 27, an upper engagement recess 31 is provided at the same height as the mounting shaft 28, and a lower engagement recess 32 is provided at a lower position. The locking pin 30 is inserted into the upper engagement recess 31.
When engaged with the lower engagement recess 32, the support plate 11 is held in a horizontal position, and when engaged with the lower engagement recess 32, it is held in a forwardly inclined position.

Next, the support plate 11 will be explained.

Entrance sleeve part 3 on the rear outer side of the left edge of the support plate 11
3 is provided, and an exit sleeve portion 34 is provided at the outer front portion of the right edge. Further, a peep hole 35 long in the left-right direction is provided near the front edge of the support plate 11, and a support member 36 long in the left-right direction is attached along the rear side of the peep hole 35. Further, an extra length storage box 22 is provided along the inside of the right edge of the support plate 11.

A feeder cable 13 is arranged behind the support member 36 of the support plate 11, and a distribution cable 14 is arranged in front of the support member 36.
is placed. The feeder cable 13 is composed of a five-fiber bundle cable 37 that bundles five optical fiber core wires together, and an intermediate cable 38 that is separated into individual single wires. A plurality of 5-core cables 37 are drawn into the entrance sleeve 33 and connected to the stay 39.
It is connected to one end of a branch section 40 attached to. The intermediate cable 38 is separated into optical fiber core wires 15,
It is connected to the other end of the branch section 40. The optical fiber core wires 15 of the intermediate cable 38 are grouped into four groups for each five-core cable 37, and for each group, the extra length portions 19 wound in a circle are arranged at regular intervals in the left and right direction. The long portions 19 are held down by holding pieces 20 for each group. Each optical fiber core wire 15 of the intermediate cable 38 is connected to a single-core connector 17 on the feeder side. Each feeder side single-core connector 17 is attached to the rear surface of the support member 36 in each group.

The distribution cable 14 is separated into optical fiber core wires 16, one end of which is connected to a single-core connector 18 on the wiring side. Wiring side single core connector 18
is connected to a required single-core connector 17 on the feeder side at the front surface of the support member 36. Each optical fiber core wire 16 of the distribution cable 14 is appropriately held down by a holding piece 41, and each extra length portion 21 is stored all at once in the above-mentioned extra length storage box 22 so as to be freely put in and taken out.
Optical fiber core 1 coming out of excess length storage box 22
6 are held together by a pressing piece 42, and the exit side sleeve portion 34
It is pulled out to the outside of the support plate 11 through .

In addition, a pair of handles 26 are provided on the front edge of the support plate 11.
26 are provided.

The optical fiber cable wiring switching board of the embodiment is constructed as described above, and in a normal state, the locking pins 30 of each support plate 11 are engaged with the lower engagement recesses 32 and held in the inclined position. Ru.

When switching the wiring cable 14, etc.,
The support plate 11 above the target support plate 11 is lifted upward. Then, the support plate 11 is attached to the mounting shaft 28.
At the same time, the locking pin 30 moves to the upper engagement recess 31 and is pushed slightly backward, thereby locking the locking pin 3
0 engages with the upper engagement recess 31.

As a result, the upper support plate 11 is engaged in a horizontal position, and a work space is created above the lower support plate 11.

The wiring switching work is performed by changing the extra length 21 of the required optical fiber core 16 of the wiring cable 14.
This is done by pulling out the extra length storage box 22 and switching the connection point of the wiring side single-core connector 18 to the feeder side single-core connector 17 to an arbitrary position. Thereafter, the pulled-out extra length portion 21 is returned to the extra length storage box 22, and the upper horizontal support plate 11 is returned to its original inclined position to complete the work.

〔Effect of the invention〕

Since this invention is as described above, it has the following effects.

(a) A large number of support plates 11 are held in an inclined position,
In addition, since the wires are stacked in multiple stages with a required interval above and below, the area occupied by the wires as a whole can be reduced.

(b) By lifting the upper support plate 11 of the target support plate 11 and holding it in the horizontal position, using a locking mechanism that can lock the target support plate 11 by selectively switching between the inclined position and the horizontal position, Support plate 11
A work space for switching work and inspection work can be provided above.

(c) Since the extra length storage box 22 is provided to collectively store the extra length portions 21 of the optical fiber cores 16 of the distribution cables 14 on each support plate 11, the area for storing the extra lengths of the distribution cables 14 is reduced. The support plate 11 can be made smaller, and the extra length 21 allows the wiring-side single-core connector 18 to be moved to any desired position for wiring.

(d) By setting the length of each extra length section 21 in the extra length storage box 22 to a predetermined length in advance, it is possible to not only switch on the same support plate 11 but also to switch between different support plates. Can be switched.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a partially omitted plan view showing the support plate held in an upright position, and Figure 2 being a longitudinal cross-sectional side view of the same. 3 are partially omitted cross-sectional views of a conventional wiring switchboard for optical fiber cables. 10... Support column, 11... Support plate, 12... Locking mechanism, 13... Feeder cable, 14... Distribution cable, 15, 16... Optical fiber core wire, 17...
Feeder side single-core connector, 18... Wiring side single-core connector, 19... Extra length part, 20... Extra length holding piece, 2
1... Extra length section, 22... Extra length storage box, 25
... Frame, 26 ... Handle, 27 ... Bracket, 28 ... Mounting shaft, 29 ... Long hole, 30 ... Locking pin, 31 ... Upper engagement recess, 32 ... Lower engagement recess , 33... entry side sleeve part, 34... exit side sleeve part,
35...Peephole, 36...Support member, 37...5
Core cable, 38...Intermediate cable, 39...
...stay, 40...branch, 41...pressing piece,
42...Press piece.

Claims (1)

[Claims] 1 A plurality of support plates 11 are attached to the left and right columns 10 at predetermined intervals in the vertical direction so as to be swingable around the rear edge side, and each of the support plates 11 is attached to the locking mechanism 12.
The feeder cables 13 and distribution cables 14 are selectively locked at two positions, an inclined position and a horizontal position, and are wired on the upper surface of each support plate 11.
The optical fiber core wires 15 and 16 are connected to each other by the support plate 1.
1, the optical fiber cores 15 of the feeder cable 13 are divided into a plurality of groups, and the extra length portions are grouped into each group. 19 are each held by an extra length holding piece 20, and furthermore, the extra length portion 21 of each optical fiber core wire 16 of the above-mentioned wiring cable 14 can be freely put in and taken out of an extra length storage box 22 provided on one end of the support plate 11. A wiring switchboard for optical fiber cables that is stored in bulk.