CS201031B2 - Distribution box for electric conduit - Google Patents

Abstract

1490629 Junction box BASSANI TICINO SpA 15 July 1975 [16 July 1974] 29653/75 Heading H2E An outlet box 1 has an octagonal lateral wall 2 which presents eight faces, and a base wall 5, coaxial with wall 2, the base wall being in the form of a truncated hexagonal pyramid having six faces preferably inclined to the common axis of the walls at 45 degrees. Walls 2 and 5 are so orientated about the axis of box 1, that a pair of opposite edges, e.g. 7 and 8, of wall 5 are, in plan view, perpendicular to a respective pair of opposite faces, e.g. 9 and 10 of wall 2.

Description

BACKGROUND OF THE INVENTION The present invention relates to a junction box for power lines having a peripheral wall and a bottom for breaking openings for the passage of conductors.

It is known that pipes or hoses are used in the laying of electrical conductors, which are embedded in walls or ceilings and form a suitable conduit for the installation of cables, the nodes of which usually consist of distribution boxes. The junction box serves to connect the ends of the conductors coming from different directions. Connecting junction boxes a. Hoses or pipes pose problems in terms of variable directions of incoming hoses and pipes and their different diameters, and the use of junction boxes of the smallest transverse dimensions to reduce installation costs.

As a result, the boxes are supplied without pre-opened or pre-opened boxes. apertures so that these apertures can be received in the walls of the box according to the position and diameter of the hoses and pipes to be connected.

During development, boxes with a rectangular cross-section were produced to produce side walls that pointed in different directions and in which a perfectly circular rather than elliptical break-through opening can be made, as is the case with cylindrical boxes. Perfectly circular, broken holes to insert hoses and pipes with conductors directly into the holes, without having to use a concrete seal; this saves on labor and labor costs. '

Despite the current trend is not solved the problem of the boxes of small dimensions suitable for connecting the conductors guided in tubes which are to the central axis of boxes either perpendicular or inclined at an angle of about 45 ^A, which is the case of boxes which are sweat-Teji into ceilings are designed to pripo2010J1

201031 2 connecting wires coming from different directions and equipped with connection blocks or similar for fastening the luminaire ·

In this case, junction boxes with a cylindrical side wall and a conically tapered bottom are used to connect hoses or tubes with conductors coming from different directions; however, the holes that must be broken are elliptical and require a seal between the hose or tube and the box.

To eliminate this disadvantage, boxes are produced in which special raised planar surfaces are formed on the cylindrical and conical walls; this, of course, complicates production considerably, requiring the use of a complex mold, thereby increasing the manufacturing cost of the box.

Also known are boxes whose peripheral wall is made of eight vertical surfaces and the bottom of eight sloping surfaces. This construction has the disadvantage that the sloping surfaces of the bottom taper towards the box axis so that they must be oversized in order to break openings for them. pipes of large cross-section. This means that the dimensions of the vertical surfaces must also be increased, so that the diameter of the entire box is increased and thus its price increases.

The present invention resides in the fact that an octagonal prism-shaped peripheral wall is adjoined by a truncated hexagonal pyramid-shaped bottom which is coaxial with the side wall and intersects it along a spatially angled line.

The junction box according to the invention permits the connection of conductors which extend perpendicularly or obliquely to its axis, with its surfaces corresponding to the different input directions of the conductors being planar, so that perfectly circular openings can be broken therein to avoid the need for a seal; the junction box is small in size and allows connection of wires stored in hoses and pipes with a maximum diameter ·

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated by way of example with reference to the accompanying drawing, in which: FIG.

The junction box 1 according to the invention has an octagonal prism-shaped peripheral wall g which is dimensioned such that openings having a diameter corresponding to the maximum diameter of the hoses or tubes g, 1 with electrical conductors coming perpendicular to k can be broken into its eight planar differently directed surfaces. box axis.

The octagonal shape is advantageous because there is a perpendicular surface perpendicular to each surface of the peripheral wall g so that hoses and pipes 8, 1 which extend perpendicular to each other can be connected.

The circumferential wall g is followed by a truncated 5-sided pyramid-shaped bottom 5 which intersects the circumferential wall g along a spatially angled line.

If the bottom Z were also octagonal as the circumferential wall g, its inclined surfaces would be too narrow so that holes of sufficient size could not be broken in them. Therefore, the transverse dimensions of the box would necessarily have to be increased, the box would need a lot of space under the plaster and the material consumption for its production would increase. By way of example, an opening of up to 25 mm in diameter can be broken into the vertical walls of the box having a width of 28 mm; such openings in the shape of an octagonal truncated pyramid whose side walls have a corresponding width of 28 mm at the bottom cannot be broken through such openings, as the walls taper upwards too much.

On the other hand, the hexagonal pyramid bottom of the box according to the invention can easily be penetrated through holes of 25 mm in diameter because its side walls have a larger surface area.

Preferably, the half apex angle of the hexagonal bottom Z is 45 °; the wires that come to the junction box from different levels will bend at a 45 ° angle and can easily slide into the junction box.

The triplets of adjacent sides of the hexagonal bottom 2 intersect at the edges X, 8 (Fig. 2). The edges X, 8 of the two opposite pairs of sides lie in one plane and this plane is perpendicular to the two opposing faces 2, 10 of the peripheral wall 2. In this embodiment, the sides of the hexagonal day 2 have the maximum usable area.

The junction box according to the invention is versatile and is particularly suitable as a ceiling box for prefabricated buildings where a lot of dimensions and a large number of leads depend on it.

SUBJECT . OF THE INVENTION

Claims (3)

A junction box for power lines having a peripheral wall and a bottom for breaking through openings for the passage of conductors, characterized in that an octagonal prism-shaped peripheral wall (2) adjoins a truncated hexagonal pyramid-shaped bottom (5) coaxial with the side wall (2) and intersects it along the spatially angled line (6). 2. The junction box according to claim 1, characterized in that two opposing pairs of sides of the hexagonal base (5) intersect at edges (7, 8) lying in one plane which: is perpendicular to the two opposing faces (9, 10) of the octagonal wall (2). The junction box according to items 1 and 2, characterized in that the hexagonal bottom (5) forms an angle of 45 ° with the axis of the junction box (1).