JP2599461B2 - Optical cable rear branch closure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an optical cable rear branch closure.

[Background Art] An optical cable rear branch closure allows a trunk optical cable to pass through a closure housing, strips a sheath of the trunk optical cable in the closure housing to a required length, exposes a cable core, and exposes the exposed cable. Only the required optical fiber core in the core is cut and connected to the optical fiber core of the branch optical cable, and the fiber connection portion and the extra length of the optical fiber core are separated from the rest provided in the closure housing. It is structured to be stored in a long storage case.

In this case, it is preferable that the trunk optical cable penetrates the lower part in the closure housing and the extra length storage case is installed thereon, so that the horizontal width of the closure housing can be reduced, and the closure can be downsized. is there. Further, since the extra-length storage case is on the upper side, there is an advantage that the handling of the optical fiber core becomes easy when the connection of the optical fiber core is changed later.

[Problems to be Solved by the Invention] However, if the extra length storage case and the trunk optical cable are configured to be vertically overlapped as described above, there is a problem that the extra length storage case becomes a hindrance when working on the trunk optical cable side. Was.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical cable rear branch closure capable of performing work on a trunk optical cable side without the extra length storage case being in the way, even if the trunk optical cable is present under the extra length storage case. It is in.

[Means for Solving the Problems] The configuration of the present invention for achieving the above object will be described. The present invention provides a trunk optical cable clamp at both ends in a closure housing, and the both ends in the closure housing. In the optical cable rear branch closure in which the extra-length storage case is provided between the optical cable clamps, the extra-length storage case is provided on a gate-shaped extra-length storage case base raised from a bottom plate of the closure housing. Installed, a hinge is provided at a cut-off portion of one leg of the gate-shaped extra-length storage case stand, and an openable / closable connector is provided at a cut-off portion of the other leg. And

[Operation] With this structure, when working on the trunk optical cable side in the closure housing, the connection of the openable / closable coupler is opened, and the extra length storage case is lifted. And the main optical cable side can be opened. Therefore, work on the trunk optical cable side in the closure housing can be performed without the extra-length storage case being in the way.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 4 show a first embodiment of the present invention. As shown in the figure, in the optical cable rear branch closure of the present embodiment, the trunk optical cable 2 passes through the inside of the closure housing 1 which is divided into two parts up and down.
The trunk optical cable 2 is fixed to the closure housing 1 at both ends in the closure housing 1 by trunk optical cable clamps 3. Both ends of the closure housing 1 through which the trunk optical cable 2 penetrates are sealed with rubber trunk penetration seals 4. The two trunk optical cable clamps 3 are provided upright at both ends of the connecting plate 5.
The cable sheath 2A of the trunk optical cable 2 is peeled off between the two trunk optical cable clamps 3, and the cable core 2B is exposed. Connecting plate 5 in closure housing 1
Above, a gate-shaped extra-length storage case base 9 that straddles the cable core 2B is erected. On the extra length storage case base 6, extra length storage cases 7 are stacked and installed.

Loop members 8A and 8B integral with the legs 6A on both sides of the separation portion 6AC are rotatably connected to the separation portion 6AC of the leg portion 6A on one side of the gate-shaped extra-length storage case base 6. An opening / closing hinge 8 comprising a detachable connecting pin 8C is provided.
Loop members 9A and 9B integrated with the legs 6B on both sides of the separation portion 6BC are rotatably connected to the separation portion 6BC of the leg portion 6B on the other side of the gate-shaped extra-length storage case base 6. An opening / closing connector comprising an opening / closing hinge 9 comprising a detachable connecting pin 9C is provided. In other words, the opening / closing hinge 9 as the opening / closing connection tool can open the separation portion 6BC of the leg portion 6B when the detachable connection pin 9C is pulled out.

Stacked extra storage case 7 and top lid 12
Is an open / close hinge between adjacent sides on both sides in the width direction.
Linked by one. Each of the openable hinges 10, 11 is provided with a loop member 10A, 10B, 11A, 11B separately provided on the extra length storage case 7 or the top lid 12 and a detachable connection for rotatably connecting these. It is composed of pins 10C and 11C. When the detachable connecting pins 10C and 11C are pulled out of any of the openable hinges 10 and 11 on any one side, the extra length storage case 7 can be opened on the side from which the detachable connecting pins 10C and 11C are pulled out.

A branch optical cable 13 is penetrated adjacent to the closure housing 1 at one penetrating portion of the trunk optical cable 2. Both ends of the closure housing 1 through which the branch optical cable 13 penetrates or is to penetrate are sealed with a rubber branch penetrating portion sealing material 14. Closure housing 1
The branch optical cable 13 is fixed to the closure housing 1 by a branch optical cable clamp 15. The branch optical cable clamp 15 is erected on the connecting plate 5. The distal end of the branch optical cable 13 introduced into the closure housing 1 is stripped off to expose the branch optical cable tension member 16. Further, a tension member clamp 17 for a branch optical cable is erected on the connecting plate 5, and the tension member clamp 17 for the branch optical cable is provided.
Thereby, the branch optical cable tension member 16 is clamped.

Although not shown, specific optical fiber cores in the cable core 2B are cut, and these cut optical fiber cores are connected to respective optical fiber cores of the branch optical cable 13 at fiber connection parts, respectively. The extra length portion is stored in the extra length storage case 7.

In such an optical cable rear branch closure, when the detachable connecting pin 9C of the opening / closing connector including the opening / closing hinge 9 is pulled out, the connection of the opening / closing connector is released. Therefore, in this state, when the extra-length storage case 7 is rotated about the hinge 8, the trunk optical cable 2 can be opened. In this state, the operation on the trunk optical cable 2 side can be performed without the extra-length storage case 7 being in the way.

When the work is completed, lower the extra-length storage case 7 that has been raised, and attach and remove the connecting pin
Insert and connect.

Conversely, when the detachable connecting pin 8C is pulled out by using the openable hinge 8 as an openable connector, the extra-length storage case 7 is rotated about the openable hinge 9 and the main optical cable 2 is turned from the opposite side.
Can open side.

FIG. 5 shows a second embodiment of the optical cable rear branch closure according to the present invention. In the present embodiment, hinges 18 and 19, which are not openable / closable, are provided at the separation portions 6AC and 6BC of the leg portions 6A and 6B on one side of the gate-shaped extra-length storage case base 6, respectively. One of the mounting plates 18A, 19A of the hinges 18, 19 is fixed to the upper leg portions 6A, 6B of the separation portions 6AC, 6BC. The other mounting plates 18B, 19B of the hinges 18, 19 pass through the notches 18C (not shown), 19C at their tips, and pass through the fixing screws 20, 21 to the lower legs 6A, 6B. It is designed to be detachably fixed to These mounting plates 18B, 19B, the notches 18C, 19C, and the fixing screws 20, 21 make the detachable connecting tools 22, 23
Is configured.

Such an optical cable rear-branch closure loosens the fixing screw 21 of the detachable connecting tool 23 on the front side, and removes the cutout 19C of the mounting plate 19B from the fixing screw 21 to connect the detachable connecting tool 23. Melt. Therefore, in this state, when the extra length storage case 7 is rotated about the hinge 18, the trunk optical cable 2 side can be opened. Conversely, fix the screw on the other side
When the connector 21 is loosened, the connection of the detachable connector 22 is similarly released, and the extra length storage case 7 can be rotated about the hinge 19 to open the trunk optical cable 2 from the opposite side.

[Effects of the Invention] As described above, in the closure for branching an optical cable according to the present invention, a hinge is provided at the cut-off portion of one leg of the gate-shaped extra-length storage case base, and the hinge of the other leg is provided. The detachable part is provided with an open / close connector, so when working on the main optical cable side, open the connection of the open / close connector and lift the extra length storage case so that the extra length storage case rotates around the hinge. To open the trunk optical cable side. Therefore, according to the present invention, the work on the lower trunk optical cable side can be performed without the upper excess storage case being in the way.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a first embodiment of an optical cable rear branch closure according to the present invention, and FIGS. 2 and 3 are longitudinal sectional plan views of the first embodiment of the optical cable rear branch closure according to the present invention. FIG. 4 is a transverse sectional view of the optical cable rear branch closure shown in FIG. 3, and FIG. 5 is a perspective view of a main part of a second embodiment of the optical cable rear branch closure according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Closure housing, 2 ... Optical cable, 2A ... Cable sheath, 2B ... Cable core, 3 ... Clamp for trunk optical cable, 4 ... Seal material for trunk penetration part, 5 ... Connection plate, 6 ...
Extra storage case base, 7 Extra storage case, 8 Openable hinge, 8A, 8B Loop member, 8C Detachable connecting pin, 9 Openable hinge (openable connector), 9A, 9B Loop member , 9C…
Detachable connecting pins, 10,11… Hinged hinges, 10A, 10B, 11A, 11B…
Loop member (hinge), 10C, 11C ... detachable connecting pin, 12 ...
Lid, 13… branch optical cable, 14… branch penetration part sealing material, 15
… Branch optical cable clamp, 16… branch optical cable tension member, 17… branch optical cable tension member clamp.

Claims (1)

(57) [Claims] An optical cable rear-branch closure in which main line optical cable clamps are respectively provided at both ends in a closure housing, and extra length storage cases are provided between the optical cable clamps on both sides in the closure housing. The extra-length storage case is installed on a gate-shaped extra-length storage case base that is raised from a bottom plate of the closure housing, and a separation portion of one leg of the gate-type extra-length storage case base is provided. An optical cable rear-branch closure, wherein a hinge is provided, and an openable / closable connector is provided at a separation portion of the other leg.