JPH01123202A - Optical cable connecting box for wiring in room - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an optical cable junction box for indoor wiring that connects, for example, an optical cable laid under the floor and an optical cable connected to indoor equipment.

[Prior Art] This type of conventional optical cable junction box for indoor wiring has a structure that is installed on the floor, and the tip of the optical connector on the junction box side is exposed on the side of the box body of the junction box. The structure was supported by

[Problem to be Solved by the Invention 1] However, in such a structure, since the entire structure is exposed above the floor surface, there is a problem that the appearance is poor. Also,
In the conventional structure, the tip of the optical connector on the box body side is exposed outside the box body in a standby state, so there is a problem that the connection surface of the optical connector may become dirty or damaged.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical cable junction box for indoor wiring that can improve the appearance and protect optical connectors on the box body side well.

[Means for Solving the Problems] To explain in detail the present invention for achieving the above object, the optical cable junction box for indoor wiring of the present invention includes a built-in box main body having an optical cable lead-in hole; a board mounted to cover an opening of a recessed box body; an open rfI lid supported by a cantilever on the opening of the board so as to be freely openable and closable;
a spring that biases the opening lid in the opening direction; and a locking mechanism that is assembled on the back surface of the board and locks the opening/closing lid in each state when the opening/closing lid is in an open or closed state. , comprising an adapter holder replaceably supported on the back surface of the IFO closing lid, and an optical connector adapter supported by the adapter holder.

[Function] In such an optical cable junction box for indoor wiring, the box body is buried inside the floor or the like, and only the board side is exposed, so that the aesthetic appearance can be improved. Further, since the optical connector on the box body side is supported by the adapter holder on the back side of the opening/closing lid, it can be sufficiently protected even if the opening/closing lid is opened. Further, since the optical connector is inserted into the adapter holder and supported, it is easy to attach it to the back surface of the opening/closing lid by simply inserting it. Next, the installation of the optical connector on the box body side can be done by removing the board from the box body and then attaching it to this board, which eliminates the need to do it in the narrow space restricted by the box body, making the work easier. is good. Furthermore, changes in the size of the optical connector can be accommodated by replacing the adapter holder with one that matches the size.

Moreover, when performing concrete pouring work for buildings, etc., it is only necessary to position the box body first, and there is no problem even if water or the like gets in. Also, when the optical connector on the device side and the optical connector on the box body side are connected by inserting them into the adapter, the rMrJl lid will be locked and will not close, so do not open the optical fiber cable led out! l
1M closing action will not cause damage.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 12, the optical cable connection box of this embodiment has a metal box body 2 embedded in a floor 1.
has. An optical cable lead-in hole 3 is bored in the bottom of the box body 2. A floor duct 4 is buried in the floor 1, and the box body 2 is positioned so that the duct hole 4A of the floor duct 4 and the optical cable lead-in hole 3 of the box body 2 match. The optical cable 5 drawn into the floor duct 4 is drawn into the box body 2 from the optical cable lead-in hole 3 with a required extra length.

An optical connector 6 is attached to the tip of the optical cable 5 inside the box body 2. A board 7 is placed on the top opening of the box body 2 and fixed to the box body 2 with screws 8. An opening 9 is provided in the center of the substrate 7. The opening 9 is opened and closed by opening and closing 110. l1g closing lid 10
is cantilevered by a hinge 11 on the back side of the board 7 so as to be openable and closable.

Further, the opening 11M10 is urged in the opening direction by the spring 12.

A bracket 13 is fixed to the back surface of the opening/closing lid 10, and an adapter holder 14 is supported on the bracket 13 so that it can be replaced with a screw 15. An adapter 16 is supported through the adapter holder 14 in a direction parallel to the lff1m110. The tip of the optical connector 6 at the tip of the optical cable 5 is inserted into and supported by the adapter 16 . A locking piece 17 for preventing opening is folded back toward the opening/closing lid 10 side and protrudes from the lower part of the bracket 13.

A locking mechanism 18 is provided on the back surface of the substrate 7 on the side facing the tip of the adapter 16 for locking the opening/closing lid 10 in each open or closed state. The locking mechanism 18 has a rotating shaft 20 whose upper portion is fitted into a stepped set hole 19 of the substrate 7 so as to be rotatable and not to escape upward. A driver 20A is provided at the top of the rotating shaft 20. A stepped portion 20B that fits into the stepped set hole 19 is provided on the outer periphery of the top of the rotating shaft 20. Further, the rotating shaft 20 is provided with a concentric spring housing recess 20C that opens downward, and a stepped portion 20E is provided at the tip of the large diameter portion 20D located inside the spring housing recess 20C when viewed in the radial direction. Through the small diameter part 20F
A spring locking groove 20 is formed in the cylindrical portion 20G, which is radially outer than the spring housing recess 20G, from the lower end toward the stepped portion 2OB. A spring 21 is fitted around the outer periphery of the large diameter portion 200, and one end of the spring 21 is inserted into a spring locking groove 20H to prevent rotation. A casing 22 is fitted to the lower outer periphery of the rotating shaft 20 using the stepped portion 20E as a stopper, and the casing 22
A small diameter portion 20F is led out from a hole 22A at the bottom of the hole 22A. A flange 22B is provided on the upper part of the casing 22, and the casing 22 is fixed to the back surface of the substrate 7 by a screw 23 passing through the flange 22''B.The bottom surface of the casing 22 is provided with a lever stopper that protrudes downward. The portion 22C projects in an L-shape at a right angle.The casing 22 is provided with a spring locking groove 22D for locking the other end of the spring 21.Casing 2
The base of a lock lever 24 is fitted onto the outer periphery of the small diameter portion 20F of the rotating shaft 20 protruding from the bottom of the rotary shaft 20, and is fixed with a pin 25 to prevent rotation. The lock lever 24 can be rotated within a range of 90° allowed by the lever stopper portion 22C. At the bottom of the casing 22,
Support plate 26 that supports the lock lever 24 so that it does not fall
is fixed with screws 27.

The optical connector 29 at the tip of the optical cable 28 connected to the indoor i-device is inserted into the adapter 16 and connected to the optical connector 6 when the opening/closing M10 is open as shown in FIG.

Such an optical cable junction box for indoor wiring is on standby in the state shown in FIGS. 2 and 3 when the optical connector 29 is not connected. In this state, the optical connector 6 on the box main body 2 side is housed within the box main body 2, so that the connection surface of the optical connector 6 can be prevented from becoming dirty or damaged. In addition, in this state, the indoor wiring optical cable junction box has the box body 2 side embedded in the floor etc.
The interior aesthetics can be improved compared to the exposed type. When the lid 10 is closed, the lock piece 17 for preventing opening hits the bottom surface of the lock lever 24 as shown in FIG.
IIffll [10 is prevented from opening regardless of the bias of the spring 12.

In this state, when the rotating shaft 20 of the lock mechanism 18 is turned clockwise using the driver groove 2OA, the lock lever
24 rotates together and separates from the opening prevention lock piece 17,
Opening/closing M10 is unlocked.

At this time, the spring 21 is charged with the rotation of the rotating shaft 20. When the opening/closing 1110 is unlocked, the opening rJl 110 rotates clockwise in FIG. 2 about the hinge 11 due to the bias of the spring 12, and enters the open state as shown in FIG. 1. When the external force that was rotating the rotary shaft 20 clockwise is removed, the rotary shaft 20 and the zero lever 2.4 are rotated counterclockwise by the bias of the spring 21 and returned to their original standby positions. In this state, as shown in FIG. 1, the lower surface of the bracket 13 of the opening/closing lid 10 is supported by the O-lock lever 24, and the IFIlmMlo is locked so that it will not close even if an external force is applied. Therefore, in this state, the optical connector 29 can be connected to the optical connector 6 via the adapter 16. In addition, in this state, as mentioned above, the opening/closing lid 10 is locked so that it cannot be opened.
The optical connector 29 and the optical cable 28 are opened by the closing operation of the opening/closing lid 10.
You can avoid having 11 phrases.

[Effects of the Invention] As explained above, in the optical cable connection box for indoor wiring according to the present invention, the box body is embedded inside the floor etc., and only the substrate side is exposed, so that the aesthetic appearance can be improved. can. In addition, the optical connector on the box body side is supported by the adapter holder on the back of the opening/closing lid, so 1F1
It can be sufficiently protected even if Ill M asks. Further, since the optical connector is inserted into the adapter holder and supported, it is easy to attach it to the back surface of the opening/closing lid by simply inserting it. Next, the installation of the optical connector on the box body side can be done by removing the board from the box body and then attaching it to this board, which eliminates the need to do it in the narrow space restricted by the box body, making the work easier. is good. Furthermore, changes in the size of the optical connector can be accommodated by replacing the adapter holder with one that matches the size. And also,
When performing concrete work on buildings, etc., it is only necessary to position the box body first, and there is no problem even if water gets in. In addition, when the optical connector on the device side and the optical connector on the box body side are connected by inserting them into the adapter, the opening/closing cover is locked and will not close, so the optical fiber cable led out to the outside must be connected to the adapter. This has the advantage that there is no damage caused by the closing operation.

[Brief explanation of the drawing]

1 and 2 are vertical cross-sectional views of an embodiment of the optical cable junction box according to the present invention in use, with the lid open and closed, and FIG. 3 showing the optical cable in the state shown in FIG. 2. A plan view of the junction box, FIGS. 4 and 5 are a partially cutaway side view and a bottom view showing the assembly state on the board side, FIG. 6 is a partially longitudinal side view of the board side in an exploded state, and FIG. The figure is a plan view with the support plate of the lock mechanism removed, Figures 8 and 9.
The figures are a vertical cross-sectional view and a bottom view of the rotating shaft, figures 10 to 12.
The figures are a plan view, a longitudinal sectional view, and a bottom view of the housing. 1... Floor, 2... Box body, 3... Cable entry hole, 4... Floor duct, 4A... Duct hole, 5...
・Optical cable, 6... Optical connector, 7... Board, 8
...screw, 9...opening, 10...opening/closing lid, 11
... Hinge, 12 ... Spring, 13 ... Bracket, 14 ... Adapter holder, 15 ... Screw,
16... Adapter, 17... Lock piece for preventing opening,
18... Lock mechanism, 20... Rotating shaft, 2OA...
- Driver groove, 21... Spring, 22... Casing, 24... Lock lever 128... Optical cable, 29... Optical connector. Figure 1 Figure 4 Figure 5 Figure 6 Figure 8 Figure 10

Claims (1)

[Claims] a built-in box body having an optical cable lead-in hole; a board mounted to cover the opening of the built-in box body; and an opening/closing lid supported by a cantilever on the opening of the board so as to be openable and closable. a spring that biases the opening/closing lid in the opening direction; and a locking mechanism that is assembled on the back surface of the board and locks the opening/closing lid in each state when the opening/closing lid is in an open or closed state. An optical cable junction box for indoor wiring, comprising: an adapter holder exchangeably supported on the back surface of the opening/closing lid; and an optical connector adapter supported by the adapter holder.