JP2953732B2 - Optical fiber cable holding structure - Google Patents

Description

The present invention relates to an optical fiber cable holding structure for holding an optical fiber cable used as an optical transmission line of an optical communication device in the optical communication device. .

(Prior Art) A unit 2 having an optical-electrical conversion circuit is housed in an optical communication device 1 as shown in FIGS. 3 and 4, and an optical fiber cord is connected to this unit 2. This is performed via the inlet 3 provided on the back of the optical communication device 1. Usually, a plurality of the optical fiber cords are bundled and protected by a jacket to constitute an optical fiber cable.

This optical fiber cable was conventionally held in the optical communication device 1 as shown in FIG. That is, the plurality of optical fiber cords 4 are bundled and covered with a jacket to connect optical communication devices as an optical fiber cable 5. The optical fiber cable 5 is held by a cable holding member 7 on a cable holding plate 6 provided on the back of the optical communication device 1, and the cable holding member 7 is held by two screws 8.
It is fixed to. A tension member 9 is inserted into the optical fiber cable 5, and one end of the tension member 9 is fixed to a fixture 10 fixed to the holding plate 6.

The optical fiber cord 4 pulled out from the fixed optical fiber cable 5 is introduced into the optical communication device 1 from the introduction port 3 shown in FIG. The cable holding member 7 is formed in a U-shape as shown in FIG. 6, and an open end thereof is bent outward at a right angle. A screw 8 is inserted into a hole 7b formed in the bent portion 7a, and the cable holding metal 7 is fixed to the holding plate 6 with the screw 8.

However, according to the above-described conventional optical fiber cable holding structure, one optical fiber cable 5 is attached to the holding plate 6.
However, when a plurality of devices 1 are stacked and mounted on a frame, the optical fiber cables 5 connected to each device 1 interfere with each other, and bending stress is applied to the cables 5,
There is a possibility that the reliability as an optical transmission line is impaired.

In order to solve this problem, conventionally, as shown in FIG. 7, the width of the holding plate 6 in the depth direction is increased, and a plurality of optical fiber cables 5 are arranged in parallel. It was designed to be held on the holding plate 6.

By doing so, the fixing member 10 of the tension member 9
Since the tension member 9 is fixed at a desired position, the optical fiber cable 5a fixed to the lower device 1 and the optical fiber cable 5b fixed to the upper device (not shown) are fixed. Can be held on the holding plate 6 by shifting the position. As a result, there is no possibility that the cables 5a and 5b will interfere with each other to apply bending stress, and the cables fixed to the upper equipment
There is an advantage that 5b can also be held by the holding plate 6 of the lower device 1.

However, according to this holding structure, the distance between the cables 5a and 5b must be increased in order to prevent the bent portions 7a of the adjacent cable holding fittings 7 from interfering with each other.
There is a problem in that the width of the holding plate 6 in the depth direction is increased and the size of the optical communication device 1 in the depth direction is significantly increased.

(Problems to be Solved by the Invention) As described above, according to the conventional optical fiber cable holding structure, bending stress is not applied to the optical fiber cables fixed to the optical communication devices stacked in a plurality of stages.
In order to hold the optical information device, it is necessary to increase the width of the holding plate in the depth direction, and there is a problem that the depth dimension of the optical communication device is significantly increased.

The present invention has been made in view of such a point,
It is an object of the present invention to provide an optical fiber cable holding structure capable of holding an optical fiber cable in the optical communication device so that bending stress is not applied to the optical fiber cable and without significantly increasing the depth dimension of the optical communication device. Aim.

[Structure of the Invention] (Means for Solving the Problems) The holding structure for an optical fiber cable according to the present invention is a single optical fiber cable for each of N optical communication devices arranged in one direction in a rack. And an optical fiber cable holding structure for connecting an optical fiber cord included in the optical fiber cable to a unit provided in each of the optical communication devices, wherein each of the N optical communication devices A cable holding plate for holding an optical fiber cable is provided on the back surface of the optical fiber cable, and the outer periphery of each optical fiber cable when N optical fiber cables are arranged side by side is provided on each cable holding plate. Attachment holes formed at positions corresponding to the feet of the holder which are covered and locked in a U-shape, and the end of the jacket of the optical fiber cable is located at the position of each of the attachment hole pairs. In this case, a hole formed at a position corresponding to a fixture for fixing the tension member inserted into the optical fiber cable is formed, and the optical fiber cord included in the optical fiber cable is used in the optical communication device. In the cable holding plate at a position to be connected to the unit provided in the unit, the fixing tool penetrates the tension member and is fixed to the corresponding hole, and the optical fiber cable is covered by the holding tool and the corresponding mounting hole is formed. In the cable holding plate in which the foot of the holder is engaged and the optical fiber cable is located on the way to extend to another cable holding plate, the optical fiber cable covers the hole, and the optical fiber cable is covered by the holder. Then, the foot of the holder is engaged with the corresponding mounting hole, and the optical fiber cable is held.

(Operation) According to the above configuration, it is not necessary to screw the cable holding bracket to attach the cable holding bracket to the cable holding plate.
Its width can be reduced. Therefore, when a plurality of optical fiber cables are held in parallel by the cable holding plate, the fiber cables can be arranged close to each other, and the width of the cable holding plate in the depth direction can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 and 2 show an embodiment of the present invention. 1, the same or equivalent parts as those in the conventional example shown in FIG. 7 are denoted by the same reference numerals. Cable holding plates 6a, 6b, 6c are respectively provided on the back surfaces of a plurality of, for example, three optical communication devices 1a, 1b, 1c stacked and mounted on a rack (not shown). Each of the cable holding plates 6a, 6b, 6c is provided with three pairs of rectangular mounting holes 11a, 11b, 11c at intervals substantially equal to the outer diameter of the optical fiber cable 5, and these three pairs of mounting holes are provided. Numeral 11 is formed close to and vertically displaced from each other.
Further, holes 12a, 12b, 12c for fixing the tension member 9 are provided above the center lines of the respective intervals of the three pairs of mounting holes 11a, 11b, 11c.

FIG. 2 shows a cable holding fitting 13 used in this embodiment. The cable holding bracket 13 is formed in a substantially U-shape, and the interval between two opposing parallel sides is substantially equal to the diameter of the optical fiber cable 5. Notches 14 are formed in the vicinity of the tips of the two parallel sides, respectively, facing downward.

Next, a procedure for attaching the optical fiber cable 5 to the cable holding plate 6 will be described with reference to FIG. A plurality of (for example, three) optical communication devices 1a, 1b, and 1c are vertically stacked on a rack (not shown). First, each optical communication device 1
optical fiber cables 5a, 5a connected to a, 1b, 1c respectively
The upper ends of the tension members 9a, 9b, 9c of b, 5c are fixed to the cable holding plates 6a, 6b, 6c by the tension member fixing brackets 10a, 10b, 10c, respectively. At this time, the fixtures 10a, 10b, 10
c is the hole 12a of the cable holding plate 6a, the hole 12b of the 6b, and the hole of the
Fixed to 12c. That is, the cables 5a, 5b, 5c are hung in parallel at predetermined intervals.

Next, connect each cable 5a, 5b, 5c to a cable holding bracket.
The holding plates 6a, 6b, 6c are held by 13a, 13b, 13c. At this time, for example, when the cable 5a is held on the holding plate 6a by the cable holding bracket 13a, the cable holding bracket is connected to the cable 5a.
And a notch 14 formed at the tip is hooked and locked in a pair of mounting holes 11a. Similarly, the other cables 5b and 5c are respectively engaged with the mounting holes 11b and 11c.

Next, the optical fiber cords 4a, 4b, 4c fed out from the cables 5a, 5b, 5c, respectively, are introduced into the devices through the introduction ports 9 provided on the back surfaces of the optical communication devices 1a, 1b, 1c, and provided respectively. Connected to the unit 2.

According to this embodiment, even when a plurality of optical communication devices 1 are vertically stacked, the optical fiber cable 5 is held parallel to the cable holding plate 6, so that the optical fiber cable 5 can be held without applying a bending stress. it can. Also, cable holding bracket
The hook 13 is a hook type and does not need to be screwed, and since the adjacent holding brackets 13 are held on the holding plate 6 shifted vertically, the pitch between the cables can be reduced. Therefore, the width of the cable holding plate 6 in the depth direction can be reduced, and the increase in the depth dimension of the optical communication device 1 can be minimized.

In the above embodiment, the case where the number of the optical communication devices 1 is three has been described, but the number is not limited to three. Also, the arrangement of the optical fiber cables 5 on the cable holding plate 6 is not limited to the illustrated one. For example, the cable 5a connected to the lower optical communication device 1a may be held at a position closest to the device 1a. .

[Effects of the Invention] As described above, according to the present invention, a U-shaped holder is used to hold an optical fiber cable.
When the optical fiber cables are arranged side by side on the cable holding plate, the width can be reduced, and the width of the cable holding plate in the depth direction can be reduced. Also,
In a cable holding plate through which a plurality of optical fiber cables pass, each optical fiber cable is held by a holder. Wiring is possible and wiring is not confused in the frame. In particular, when the N optical communication devices are stacked and arranged, the more the optical fiber cables extend upward, the more the cable holding plates are held by the holding members and the appropriate holding is performed.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of the present invention, FIG. 2 is an external perspective view showing a cable holding fitting used in this embodiment, and FIG.
FIGS. 4 and 5 are external perspective views showing the front and rear surfaces of the optical communication device, respectively. FIG. 5 is a side view showing a conventional optical fiber cable holding structure, FIG. 6 is an external perspective view showing the same cable holding bracket, FIG. 7 is a side view showing another conventional optical fiber cable holding structure. DESCRIPTION OF SYMBOLS 1 ... Optical communication equipment 2 ... Unit 4 ... Optical fiber cord 5 ... Optical fiber cable 6 ... Cable holding plate 7, 13 ... Cable holding bracket 9 ... Tension member 11 ... Mounting hole 14 ... Notch Department

Claims (1)

(57) [Claims] An optical fiber cable is associated with each of N optical communication devices arranged in one direction in a frame, and an optical fiber cord included in the optical fiber cable is associated with each of the optical communication devices. An optical fiber cable holding structure for connecting to a unit provided therein, wherein a cable holding plate for holding an optical fiber cable is provided on a back surface of each of the N optical communication devices. Each of the cable holding plates is formed at a position corresponding to a foot portion of a holding member that covers and locks the outer periphery of each of the optical fiber cables in a U-shape when N optical fiber cables are arranged side by side. Fixing holes for fixing the tension member inserted into the optical fiber cable when the end of the jacket of the optical fiber cable is positioned at the position of each of the mounting hole pairs. And a hole formed at a position corresponding to the optical fiber cable, and a cable holding plate at a position where the optical fiber cord included in the optical fiber cable is connected to a unit provided in the optical communication device. Penetrates the tension member and is fixed to the corresponding hole, the optical fiber cable is covered by the holder, and the foot of the holder is engaged with the corresponding mounting hole, and the optical fiber cable is connected to another cable. In the cable holding plate located on the way to the holding plate, the optical fiber cable covers the hole, the optical fiber cable is covered by the holding member, and the foot of the holding member is engaged with the corresponding mounting hole, An optical fiber cable holding structure, wherein the fiber cable is held.