GB2242076A

GB2242076A - Wiring access to junction box

Info

Publication number: GB2242076A
Application number: GB9005057A
Authority: GB
Inventors: Chin-Hui Yang
Original assignee: YANG CHIN HUI
Current assignee: YANG CHIN HUI
Priority date: 1990-03-07
Filing date: 1990-03-07
Publication date: 1991-09-18
Also published as: GB9005057D0

Abstract

A junction box (1, 2, 3 Fig 1) for laying beneath concrete floors or walls has a plug 95 (Figs 5 & 6) which can be removed to allow wires to be fed into the box. The plug is mounted on a bracket 92 which is secured to an opening (12) in the box. Unused openings are blanked off with an insert 6. Before the concrete is laid, only the base 7 of the plug is attached to the bracket 92 together with a rod (96 Figs 9 & 10) to indicate the position of the plug after the concrete has been cast. After casting, the concrete is drilled to expose the base 7 and the other parts of the plug 8, 9 (Figs 5 & 6) joined to the base. The joint allows the plug to be adjusted to the vertical (Figs 11 & 12). <IMAGE>

Description

t 2.el 2 C) -7 G, 1 FLOOR ELECTRIC WIRE JUNCTION CASE This invention

relates to a floor electric wire junction case.

In building construction, piping work must be made in advance for further wiring installation before concreting. According to conventional method, electric wires are distributed behind the floor and wall surface. At corner area or power outlet, a socket, bent pipe or manifold pipe will be required for connection. In consequence, the installation of electric wires according to conventional method is more complicate and time consuming. Further, according to conventional wiring process, the electric wires tend to cause electric leakage due to erosion of water. Recently, electric wire junction case is commonly used for wiring installation. Because regular electric wire junction case is blocked up with a bolt, the threads of the bolt and the junction case tend to gather rust after buried in concrete floor, and the bolt will become difficult to reiove from the case for wiring installation. Further, conventional electric wire junction case is expensive to 1.

2 manufacture, and the thread at each wiring hole of the case tend to damage during transportation.

It is therefore, an object of the present invention to provide such a floor electric wire junction case which is convenient and inexpensive to manufacture and generally comprised of a bottom block and a separate cover plat e.

Another object of the present invention is to provide such a f lour electric wire junction case in which the positioning of junctions in the passages of the junction case is simply and effectively secured by screw bolts mounted on the cover plate of the junction case above the passages.

Still another object of the present invention is to provide such a floor electric wire junction case wherein an insert is provided to block of each passage of the junction case when no wiring is required.

Still another object of the present invention is to provide such a floor electric wire junction case in 3 the connecting end of the junctions used can be a circular or square tube according to the shape of the wire conduit used.

Still another object of the present invention is to provide such a floor electric wire junction case which is easy to assembly for convenient wiring process.

Still another object of the present invention is to provide such a floor electric wire junction case in which the horizontal positioning of the movable ring plate of the wiring plug assembly is adjustable.

Still another object of the present invention is to provide such a floor electric wire junction case in which an indicator plug is used to protect wiring conduit passage from blocking up during concreting process and to indicate the location for installation of wiring plug assembly.

A yet further object of the present invention is to provide such a floor electric wire junction case in which the component parts of the wiring plug assembly is convenient to assemble through screw connection.

4 An embodiment of the present invention will now be described by way of example with reference to the 1 accompanying drawings in which:

Fig. 1 is a perspective fragmentary view of a junction case embodying the present invention; Fig. 2 is a partly perspective assembly view of the present invention; Fig. 3 is a perspective view of an insert according to the present invention; Fig. 4 is a schematic assembly view illustrating the positioning of a wiring plug assembly and an insert in a junction case; Fig. 5 is a perspective fragmentary view of the present invention illustrating the mounting of a wiring plug assembly; Fig. 6 is a perspective fragmentary view of a wiring plug assembly according to the present invention; 1 Fig. 7 is a schematic sectional view of a wiring plug assembly according to the present invention; Fig. 8 is a schematic assembly view of a viring plug assembly according to the present invention; Fig. 9 is a schematic drawing illustrating the use of an indicator plug mounting on the connector of a wiring plug.asseably; Fig. 10 is a schematic drawing illustrating the indication of the indicator rod of an indicator plug in concrete floor; Fig. 11 is a schematic drawing illustrating that a hole is made on the concrete floor where a wiring plug assembly is located; Fig. 12 is a schematic drawing illustrating the mounting and the horizontal positioning of a wiring plug assembly inside a hole made on the concrete floor.

Referring to the various drawings attached 6 herewith, a detailed description of the structural features of a floor electric wire junction case of the present invention is as follows:-

Turning now to the annexed drawings in detail and first referring to Figs. 1 and 2, therein illustrated is a floor electric wire junction case embodying the present invention and generally comprised of a bottom block 1, a cover plate 2, a cap 3, and a plurality of junctions 4.

The bottom block 1 comprises four pieces of sector posts 10 upstanding therefrom at the four corners and a plurality of square posts 11 upstanding therefrom around the periphery among the sector posts 10. The sector posts and the square posts define therebetween a plurality of passages 12 for setting therein of a plurality of junctions 4 respectively. The sector posts 10 and the square posts 11 each comprises a bolt hole 100 or 110 at the top. The cover plate 2 comprises four round holes 20 at the four corner to match with the four bolt holes 100 of the four sector posts, and a plurality of round holes 21 around the periphery to respectively match with the bolt holes 110 of the square 7 posts 11. During assembly, the cover plate 2 is mounted on the bottom block 1 and screw bolts 101 and 111 are used to respectively inserted through the corner round holes 20 and the side round holes 21 into the bolt holes 100 of the sector posts 10 and the bolt holes 110 of the square posts 11 to firmly secure the cover plate 2 to the bottom block 1. A pair of bolt holes 22 each are made on the cover plate 2 at both sides of each round hole 21 above each passage 12, such that screw bolts 220 may be inserted therethrough to press on the junctions 4 set therebelow so as to let the junctions be firmly positioned. The junctions 4 each includes a collar 40 having a bolt hole 41 made thereon for insertion therethrough of a screw bolt 410 to screw tight a wiring plug connecting tube 5 in the collar 40. The cover plate 2 also comprises a flange 23 in the center defining therein a center hole. The flange 23 comprises a pair of symmetrical lugs 24 each having a bolt hole 240 made thereon to respectively match with the two round holes 30 of the cap 3 such that two screw bolts 31 way be used to insert through the round holes 30 into the bolt holes 240 to secure the cap 3 to the cover plate 2.

1 8 Referring to Figs 3 through 5, a wiring Plug assembly 95 is mounted on a tubular bracket 92 inserted in the collar 40 of a junction 4 received in each passage 12 of the junction case. When no wiring is required in any passage 12, the pair of screw bolts 220 above the passage 12 may be loosened to let the junction 4 set therein be removed. As a replacement, an insert 6 is inserted in the passage 12 and the pair of screw bolts 220 thereabove are screwed tight to secure the insert 6 to block up the passage 12. As illustrated in Fig. 3, an insert 6 comprises a flange 60 at the top. When an insert 6 is inserted in a passage 12, the flange 60 is stopped at the front wall around the passage 12 to completely block up the way. As an alternate form of the collar 40, the junctions may respectively comprise a square tube 42 for connection thereto of a square wiring plug connecting tube 43 (see Fig. 4). Because the bottom block 1 and the cover plate 2 are not unitarily made through shape molding process, they are more convenient and inexpensive to manufacture.

Referring to Figs. 6 through 8, a wiring plug assembly 95 is generally comprised of a tubular bracket 92, a 9 connector 7, a ring plate 760, an intermediate socket 8, an upper socket 82 and a cap 9. The tubular bracket 92 includes a circular opening 93 at the top having made thereon a pair of opposite notches 94. The connector is mounted on the tubular bracket 92 in the circular opening 93, and is a stepped tube defining therein a curved inner mall 73. It includes a bottom cylinder 70 having made thereon a pair of raised portions 71 to match with the pair of opposite ndtches 94 of the tubular bracket 92 for connection, and an upper cylinder 72 having made thereon a through-hole 74 for insertion therein of a pin 75 to secure the ring 760 therein. The ring plate 760 is a conical ring having narrower diameter at the top and wider diameter at the bottom. comprising an internal thread 79 for screw connection with the intermediate socket 8, and a notch 77 on the outer wall surface 76. When the ring plate 760 is inserted in the curved inner mall 73, the pin 75 which inserted through the through-hole 74 is seated in the notch 77 to stop against the two side edges 78 of the notch 77, such that the ring plate 760 is protected from rotating. The intermediate socket 8 includes a smaller bottom cylinder 80 having an external thread 800 made thereon for screw connection with the internal thread 79 of the ring f i plate 760, and a pair of circular pillars 81 which are attached to the inner wall surface opposite to each other, each comprising a bolt hole 810 on the top. The upper socket 82 is a solid pipe fitting mounted on the intermediate socket 8 at the top and comprises an internal thread 88 for screw connection with the cap 9, a rectangular hole 87 for connection thereto of an electric socket during wiring process, and a pair of opposite bevel holes 83 and 84 for insertion therethrough of a pair of screw bolts 85 and 86 to screw up with the bolt holes 810 of the two circular pillars 81 to further secure the upper socket 82 to the intermediate socket 8. The cap 9 includes an external thread 91 for screw connection with the internal thread 88 of the upper socket 82 to block up the wiring plug assembly, and an elongated slot 90 on the top through which a tool may be used to remove the cap from the upper socket 82 for electric wiring.

Referring to Figs. 9 and 10, during wiring process before concreting, an indicator plug which is comprised of a circular plug portion 95 and an indicator rod portion 96 is mounted on the connector 7 in the ring plate -760. After 1 Z 11 concreting, the top end of the indicator rod portion 96 is protruding beyond the top surface of the concrete to indicate the correct position for wiring plug assembly. Referring to Figs. 11 and 12, during installation of wiring plug assembly, use a tool to drill a hole 951 in the concrete 950 at the location where.the indicator rod portion 96 of an indicator plug is located. After the indicator plug is removed, the intermediate socket 8, the upper socket 82 and the cap 9 are respectively connected to the ring plate 760 to build up a wiring plug assembly. In case the tubular bracket 92 is forced to incline during concreting, the ring plate 760 may be adjusted through an angle from 1-10 to correct the horizontal positioning of the wiring plug assembly.

J 1 1

Claims

CLAIMS:

1. An electric wire junction box including a housing having a plurality of posts defining the sides thereof and a plurality of passages therebetween, a cover plate mounted on and being attachable to said posts of said housing, a cap covering mountable on said cover plate; a plurality of outlet members through which electric wires are directed, each of the outlet members being firmly securable in a respective one of the outlet passages, a plurality of wiring brackets each being connectable to a wiring plug connecting tube of a respective one of said outlet members, a wiring plug assembly being mounted on one of said wiring brackets; and a plurality of inserts for insertion into a respective passage when that passage is not in use.

2. A floor electric wire junction case including:

a bottom block comprising four sector posts at the four corners and a plurality of square posts around the periphery defining therebetween a plurality of passages, said sector posts and square posts each comprising a bolt hole at the top; a cover plate mounted on said bottom block comprising round holes respectively matching with said bolt holes of said sector posts and said square posts for insertion therethrough of screw bolts to secure said cover plate ta said bottom block. a plurality pair of bolt holes above said passages for insertion therethrough of screw bolts; a cap covering on said cover plate; a plurality of junctions respectively each being 1 sat in either on of said passages and firmly secured therein by the screw bolts Inserted through the bolt holes of said cover plate. said junctions each comprising a collar having a bolt hole made thereon for insertion tharethrough of a screw bolt to screw tight a wiring plug connecting tube therein; a plurality of wiring brackets each being connected to the wiring plug connecting tube of either one of said junctions and having respectively a round hole at the top; a plurality of wiring plug assemblies. each being mounted on the round hole of either one of said wiring brackets; a plurality of inserts each comprising a flange at the top; and wherein one of said inserts is used to insert in either one of said passages with the flange of the insert stopped at the front wall around the passage to completely block up the way when the passage is not in use for wiring.

3. The floor electric wire JUnction case according to claim 1, wherein said wiring plug assembly mounted on said wiring bracket is comprised of a connector, a ring plate inserted in said connector. an intermediate socket screwed up with said ring plate. an upper socket screwed up with said intermediate socket. and a cap screwed up with said upper socket, said connector having a curved inner wall portion to flexibly support said ring plate permitting flexible positioning of said ring plate therein.

t 14

4. The floor electric wire junction case according to claim 2, wherein said ring plate is a conical ring having narrower diameter at the top and wider diameter at the bottom to flexibly position in the inner wall portion of said connector.

5. The floor electric wire junction case according to claim 2, wherein said ring plate comprises a notch on the outer wall surface defining a pair of side edges, and wherein a pin is inserted through the side wall of said connector in said notch of said ring plate to stop against said two side edges to protect said ring plate from from rotating.

6. An electric wire junction box substantially as hereinbefore described with reference to and as illustrated in the acconpanying drawings.

Published 1991 at The Patent Office. Concept House. Cardiff Road. Newport. Gwent NP9 IRH. Further copies may be obtained from Sales Branch. Unit 6. Nine Mile Point. Cwnifelinfach. Cross Keys. Newport. NP1 7HZ. Printed by Multiplex techniques ltd. St Mary Cray. Kent.

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