JPH02262816A - Wiring method between building and gate - Google Patents

Abstract

PURPOSE:To facilitate burrying work and to reduce cost by splitting a plastic pipe into two such that one of two splitted tubes has central angle in the range of 180 deg.-240 deg. then forming a dovetail groove and tenon, respectively, in the inner face at the splitted edge of one splitted tube and the outer face at the splitted edge of the other splitted tube. CONSTITUTION:A wire (a) is led out from indoor wiring then it is placed in one splitted tube 1a or 1b. Thereafter, the splitted tubes 1a, 1b are fitted each other in zigzag such that the end sections are not overlapped, then the tubes are burried and the wire (a) is connected with a gate light L and an interphone C. The splitted tubes 1a, 1b are cut to appropriate lengths at the opposite ends 1a', 1b' of the plastic pipe A. By such arrangement, the plastic pipe can be applied easily onto the wire resulting in facilitation and cost reduction of cable burying work.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for burying and wiring electric wires between a building and a gatepost.

[Prior art and its issues]

Electric wires for gate lights and intercoms are usually buried between the building and the gateposts. This conventional burying method involves burying a PVC electrical conduit, first inserting a lead wire such as steel wire or piano wire into the electrical conduit, and then burying the electrical wire at the rear end of the lead wire. Insert the conduit with. Alternatively, first insert the wire into the conduit using a lead wire,
The conduit will be buried later.

However, in the above-mentioned conventional burying method, it is necessary to pass the lead wire through first and then pass the electric wire through, which is a complicated work and becomes an obstacle to reducing construction costs.

In view of the above points, it is an object of the present invention to provide a buried wiring method for electric wires that allows easy burying work and reduces construction costs.

[Means to solve the problem]

In order to solve the above problems, in the present invention, when storing electric wires in a plastic tube and burying it between a building and a gatepost, the plastic tube is made into a circular cross section and its longitudinal surface is Dovetails that are divided into two parts, the center angle of the cross-sectional arc of one divided cylinder is 180 to 240 degrees, and that the dovetails fit into each other over the entire length of the inner surface of the divided edge of one divided tube and the entire length of the outer surface of the divided edge of the other divided tube. A groove or an end was formed respectively, and after the electric wire was inserted into one of the divided tubes, the other was covered, and the two were connected together through the fitting of the dovetail groove and the dovetail, and then buried. It is.

The reason why the center angle of the cross-sectional arc of the split tube is set to 180 to 240 degrees is because if it exceeds 240 degrees, the center angle of the other one becomes too small and the bonding force becomes small. The thickness should be considered and selected appropriately.

[Function] In the wiring method according to the present invention configured as described above, since one of the divided tubes has a cross-sectional arc center angle of 180 degrees or more, it is easy to bend and the divided surface is easy to spread, and the electric wire is connected to one of the divided tubes. and bury the other side.

The fitting of the above-mentioned split tubes is achieved by dovetail grooves and dovetails formed on the inner surface of the split edge on one split tube and on the outer surface of the split edge on the other, so that one split edge covers the other split edge. state. Therefore, when an inward external force is applied to the tube, one of the divided tubes tends to flex inward because it is easier to bend than the other divided tube as described above, but the other divided tube does not flex as much. As a result, the fit between the dovetail groove and the dovetail becomes even stronger. Incidentally, if dovetail grooves and dovetails are formed on the outer surface of the dividing edge of one divided tube and the inner surface of the other divided tube, when an inward external force is applied, the divided tube will bend to make the fit loose.

〔Example〕

First, let us explain about the plastic tube A. As shown in FIGS. 2 and 3, this tube A has a divided cylinder 1 with a cross-sectional arc center angle θ: 210 degrees and a thickness t: 4 m1).
a, cross-sectional arc center angle θ, : 150 degrees, thickness L
: 4M divided tube 1b, with dovetail grooves 2a formed on the inner surface of the divided edge of the former divided tube 1a over its entire length, and dovetail grooves 2a formed on the outer surface of the divided edge of the latter divided tube 1b over its entire length. 2b are formed, and these are extruded to the required length from hard vinyl chloride. This length is appropriately determined in consideration of ease of transportation and the like.

The dovetail grooves 2a and dovetails 2b may be formed such that the former 2a is formed in the divided tube 1b and the latter 2b is formed in the divided tube 1a, or one of the dovetail grooves 2a and 2b may be formed in each of the divided tubes 1a and 1b.

Next, to explain the connection between the wiring inside the building H, the gate light on the gatepost W, and the interphone C, as shown in Fig. 1, first, the electric wire a is pulled out from the indoor wiring, and
, into one of the divided tubes 1a or 1b, and then put the two divided tubes 1
A and 1b are fitted together in a staggered manner so that their ends do not overlap, and are buried, and electric wire a is connected to a gate light and an interphone C. Both ends 1a' of tube A, 1
b' is used by appropriately cutting the split tubes 1a and 1b into, for example, 1/2 module.

At this time, it is preferable to cover the exposed bent part of the electric wire a with an elbow B, and it is preferable that this elbow B can also be divided into two parts.

For example, as shown in FIGS. 4(a) and 4(b), grooves 4a and mortises 4 are placed at required positions on the outer circumference of the half-split tubes 3a and 3b.
b, and by fitting both cylinders 4a and 4b together, the two cylinders 3a and 3b are combined.

This can be used as elbow B. Further, as shown in FIG. 6(a), while spirally winding a strip 5 made of hard vinyl chloride having a U-shaped recessed portion 5a and a single-shaped insertion portion 5b in series, As shown in FIG. 6(b), the insertion portion 5b is fitted into the recessed portion 5a, or the strip 5 is not spirally wound, but is annular as shown in FIG. 6(b), and the ring is continuous in the axial direction. If the fitting is made flexible, it can accommodate any degree of bending.

(Effects of the Invention) Since the present invention is configured as described above, it becomes easy to cover the electric wire with a plastic pipe, and the burying work becomes easy, thereby reducing the cost of the work.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of the wiring method between a building and a gatepost according to the present invention, and FIGS. 2(a) and 2(b) are a front view, a plan view, and Figure 3 (a), (b)
) is a side view of each divided tube of the same plastic tube, and Figure 4 (
a), (t)l are a front view and a sectional view of the elbow of the same example,
Figure 5 is a partial perspective view of the other side of the same elbow, Figure 6 (a)
, (b) is a manufacturing explanatory diagram of the other side. A...Plastic tube, B...Elbow, C...Interphone, L...Gate light, H...
...Building, W...Gatepost, a...
...Electric wire, θ1, θ2...Central arc angle of cross section, 1a, 1b...Divided tube, 2a...Dovetail groove, 2b...Dovetail Handle, 3a, 3b...tube, 4a...
Hole, 4b... Hole, 5...
Row, 5a... recessed part, 5b...
Insertion part.

Claims (1)

[Claims] (1) When storing and burying electric wires in a plastic pipe between a building and a gatepost, divide the plastic pipe into two with a circular cross section along its length, and use the center angle of the cross-sectional arc of one of the divided pipes is 180 to 240 degrees, and dovetail grooves or dovetail patterns that fit into each other are formed over the entire length of the inner surface of the divided edge of one divided tube and the entire length of the outer surface of the divided edge of the other divided tube. After inserting the electric wire into one side, cover the other side and combine the dovetail groove and dovetail pattern into one body,
A wiring method between buildings and gateposts characterized by burying it.