Optical waveguides – Accessories – Splice box and surplus fiber storage/trays/organizers/ carriers
Reexamination Certificate
2002-02-22
2004-02-17
Hyeon, Hae Moon (Department: 2839)
Optical waveguides
Accessories
Splice box and surplus fiber storage/trays/organizers/ carriers
Reexamination Certificate
active
06694084
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a unit for handling the remainder of optical cables wired in a device for mounting telecommunications equipment such as transmission devices, telephone switching devices and so on and to a method for wiring the optical cables using the unit for handling the remainder thereof.
BACKGROUND ART
The conventional units for handling the remainder thereof and cable supporting sections known are disclosed in JP-A-222866/1996, for example.
FIG. 1
is an exploded perspective view of construction of a telecommunication equipment unit-mounting device (hereafter, referred as a unit-mounting device) disclosed in the gazette above.
FIG. 2
is an enlarged perspective view of construction of the conventional unit for handling the remainder of optical cables, the unit being arranged in the unit-mounting device shown in FIG.
1
.
FIG. 3
is an enlarged perspective view of construction of a wire saddle, which is used in the unit shown in
FIG. 2
in order to keep hold of the optical cables.
In
FIG. 1
, a reference numeral
1
denotes a telecommunications equipment mounted unit mounting telecommunications equipment (not shown) such as transmission devices, telephone switching devices and so on, the equipment using optical cables as a means of conveying intelligence. A reference numeral
2
denotes a unit-mounting frame mounting the telecommunications equipment mounted unit
1
thereon. A reference numeral
3
denotes a box-shaped rack including an inner wall face having a mounting section
3
a
on which a plurality of unit-mounting frames
2
are mounted. A reference numeral
4
denotes a unit for handling the remainder of optical cables
5
used for transferring signals to the telecommunications equipment (not shown) mounted in the telecommunications equipment mounted unit
1
in order to install the optical cables
5
onto the unit
1
.
As shown in
FIG. 2
, the unit
4
includes a rectangular, flat-shaped cable supporting section
4
a
for holding the loop-shaped remainder
5
a
of the optical cables
5
and a pair of supporting arms
4
b
extending from both sides of the cable supporting section
4
a
. Each front end of the supporting arms
4
b
is fixed on an upper face of one wall of the unit-mounting frames
2
to cantilever the cable supporting section
4
a
. Two rows of mounting holes
4
c
along the length of the cable supporting section
4
a
are formed at the cable supporting section
4
a
. A wire saddle
6
shown in
FIG. 3
is fixed using a screw at the mounting hole
4
c
corresponding to a position where the remainder
5
a
of the optical cable
5
should be handled, of the mounting holes
4
c
scattered over the cable supporting section
4
a
. The wire saddle
6
is shaped like a letter U. The wire saddle
6
includes an approximately rectangular-shaped bottom section
6
a
, a pair of wall sections
6
b
, a pair of tilting sections
6
c
and a mounting hole
6
d
. The bottom section
6
a
has a flat face corresponding to the upper face of the cable supporting
4
a
. The wall sections
6
b
are so formed at both sides of the bottom section
6
a
as to extend upwardly from the both sides. The tilting sections
6
c
is formed by bending sharply upper sections of the wall sections
6
b
toward an upper space of the bottom section
6
a
. The mounting hole
6
d
is formed at a central section of the bottom section
6
a
and allows insertion of a screw (not shown) which is used for mounting the wire saddle
6
on the cable supporting section
4
a
through the mounting hole
4
c
. A gap
6
e
, which is defined between the tilting sections
6
c
of the wire saddle
6
, has a dimension smaller than an outer diameter of the optical cable
5
.
An operation will be explained hereafter.
Initially, plural unit-mounting frames
2
are mounted in the rack
3
from the front as to be stacked in multi-layers and accordingly the unit
1
is mounted on each of the unit-mounting frames
2
. Next, the optical cables
5
, which are tied in a bundle and supplied from above or beneath along rear and side faces of the rack
3
, is installed onto the cable supporting section
4
a
of the unit
4
which is mounted on a rear face of the unit-mounting frames
2
. On performing the installation of the optical cable, the wire saddles
6
are so fixed in the mounting hole
4
c
of the cable supporting section
4
a
that all of them are arranged on a circle. The remainder
5
a
of the loop-shaped optical cable
5
is held on the wire saddles
6
arranged on the circle. In this case, the optical cable
5
is pressed downwardly against ends of the tilting sections
6
c
in the gap
6
e
while the optical cable
5
is sliding on upper faces of the tilting sections
6
c
. At this time, the tilting sections
6
c
are further bent downwardly due to elastic deformation of the tilting section
6
c
with respect to the wall section
6
b
. In this way, the gap
6
e
, which is defined between the tilting sections
6
c
, is spread briefly and becomes to have a dimension larger than the outer diameter of the optical cable
5
. Therefore, the optical cable
5
is mounted in a space enclosed by the wire saddle
6
. The gap
6
e
just after the optical cable
5
is passed through becomes to have a dimension smaller than the outer diameter of the optical cable
5
because the tilting sections
6
c
return to original positions, respectively. Therefore, even if the optical cable
5
floats in the air, the optical cable
5
is held in the space enclosed by the wire saddle
6
. Moreover, the optical cables
5
held by the wire saddle
6
are connected to optical connectors (not shown) arranged in the telecommunications equipment of the unit
1
, and then the optical cables
5
are fixed in a state of putting them in order.
FIG. 4
is a perspective view of an alternative cable supporting section, which is used in the unit shown in FIG.
2
.
FIG. 5
is a perspective view of a state of holding the remainder of the optical cables using the wire saddle shown in FIG.
3
and the cable supporting section shown in FIG.
4
. As shown in FIG.
4
and
FIG. 5
, with the alternative, three rows of mounting holes
4
c
along the length of the cable supporting section
4
a
are formed at the cable supporting section
4
a
. The central row of the mounting holes
4
c
is shifted by one-half of travel between the mounting holes
4
c
in a longitudinal direction of the cable supporting section
4
a
with respect to the external rows of the mounting holes
4
c
. Therefore, two mounting holes
4
c
adjacent to each other in the central row and two mounting holes
4
c
in the external rows close to the two mounting holes
4
c
of the central row are used for handling the remainder
5
a
of one optical cable
5
. Moreover, as shown in
FIG. 5
, in the central row of the mounting holes
4
c
, two mounting holes
4
c
adjacent to each other, except for both ends of the central row of the mounting holes
4
c
, are used for handling two optical cables
5
.
The conventional unit for handling the remainder of the optical cables is however constructed as described above. Therefore, the optical connector (not shown) connected to the optical cable
5
handled using the unit
4
is close to the telecommunications equipment of the unit
1
, and is apart from the unit
4
. Accordingly, it is difficult to perform insertion and removal of the optical cable into and from the optical connector (not shown).
Moreover, with the conventional unit for handling the remainder of the optical cables, handling the remainder
5
a
of the optical cables
5
connected to the optical connector on setting up the rack
3
must perform after handling during in-plant fabrication of the unit. The complicated handling results in a poor-workability.
Further, with the conventional unit for handling the remainder of the optical cables, since numerous wire saddles
6
must be mounted on the unit, it takes much time to mount the wire saddles
6
. Accordingly, there is a poor-workability problem.
SUMMARY OF THE INVENTION
The invention was made to
Hyeon Hae Moon
Mitsubishi Denki & Kabushiki Kaisha
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