JPS6031375Y2 - bellows conduit - Google Patents

Description

[Detailed description of the invention] The present invention relates to a conduit used to protect various cables, for example, when they are buried underground or laid above ground indoors or outdoors. The object of the present invention is to provide a device that has the flat strength necessary for underground use, has excellent flexibility, is lightweight and low cost, and is easy to insert wires into.

The bellows-shaped electric conduit according to the present invention, which was devised to achieve the above object, is made by spirally winding a band of synthetic resin or synthetic rubber with a net-like bottom shape into a corrugated cross-sectional shape. A bellows-like mesh tube is formed by integrally joining adjacent end edges of the bellows-like mesh tube with heat fusion or adhesive, and a synthetic resin tape is spirally formed along at least one of the inner and outer surfaces of the bellows-like mesh tube. The characteristic structure is that the end edges of each spirally wound tape are joined together by heat fusion or adhesive.

The functions and effects of the present invention having such a characteristic configuration are as follows.

In other words, not only does the pipe wall, which makes up the main body of the conduit, have a corrugated cross-section, but almost the entire surface of the corrugated pipe wall is formed into a mesh shape, creating a bellows-like mesh with a bracket-like pipe wall. Since resin tape is spirally wrapped and bonded to at least one of the inner and outer surfaces of the pipe to provide airtightness and watertightness, which is essential for electrical conduits, the actual wall thickness of the pipe is small. In comparison, it is possible to obtain a product with high flat strength and excellent flexibility.

In other words, although it has the flatness strength to withstand underground use, where the greatest external pressure is applied among various usage examples, the manufacturing cost can be reduced as much as possible by reducing the materials used due to thinner walls. It is lightweight and easy to handle, and the synergistic effect of its corrugated shape and thinness provides excellent flexibility, making it easy to install in locations where straight line wiring is difficult. .

In addition, because of the waveform, there is less sliding resistance when dragging and inserting heavy electric wires, making the wire insertion work smoother.
It also has the advantage of being labor intensive.

Furthermore, by taking advantage of the above-mentioned characteristics of the bellows-like mesh pipe that constitutes the main body of the electrical conduit of the present invention, that is, it is superior in visibility and light weight in spite of its flat strength, this bellows-like mesh pipe is can be effectively used as underdrain pipes used when draining golf courses, grounds, parks, etc. by laying underground, and along with this, we aim to make the specifications of the underdrain pipes and the main conduit pipes the same. This has resulted in the effect of reducing production costs for all of them.

Embodiments of the present invention will be described in detail below based on the drawings.

Fig. 1 shows a mesh-like structure made of synthetic resin such as polyethylene, polyvinyl chloride, or synthetic rubber, with thin strips 4 and 5 at both ends and a knitted part 6 formed with a hook between them. As shown in FIG. The corrugated mesh pipe 2 is formed by integrally joining the edge strips 4 and 5 (for example, the corrugated crests or troughs such as the point A or the opening in FIG. 2) by heat fusion or adhesion. .

Then, a synthetic resin tape 3 of polyethylene or the like having a thickness of 0.1 to 2 mm is spirally wound along the inner surface of the bellows-like mesh tube 2, and each spirally wound tape 3 is adjacent to each other in the tube axis direction. The bellows-shaped tape tube 7 is formed by joining the end edges thereof by heat fusion or adhesive.

This bellows-shaped tape pipe 7 is generally joined to the bellows-like mesh pipe 2 by heat fusion or adhesive, but it may not be joined.

3 and 4 show different embodiments, in which the bellows-like tape pipe 7 is provided along the outer surface of the bellows-like mesh pipe 2 in the one in FIG. 3, and the bellows-like tape pipe in FIG. A tape pipe 7 is provided along both the inner and outer surfaces of the bellows-like mesh pipe 2.
The one shown in the figure and the one shown in FIG. 4 have the advantage that the sliding resistance when inserting the electric wire is smaller than that of the one shown in FIG. 3, and the insertion work is easier.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the band (material), FIG. 2 is a partially cutaway side view, and FIGS. 3 and 4 are partially cutaway side views showing different embodiments. 1... Band body, 2... Bellows-like mesh tube, 3
...Resin tape.

Claims (1)

[Scope of claims for utility model registration] ■ Band of synthetic resin or synthetic leather rubber with a net-shaped bottom 1
is spirally wound into a wave-shaped cross section, and the adjacent end edges of the spirally wound band 1 are integrally joined by heat fusion or adhesive to form a bellows-like mesh tube 2, and this bellows-like mesh tube 2
A bellows-shaped electrical conduit is formed by winding a synthetic resin tape 3 in a spiral shape along at least one of the inner and outer surfaces thereof and joining the edges of each spirally wound tape 3 to each other by heat fusion or adhesive. (2) The bellows-like electric conduit according to claim 2, wherein the synthetic resin tape 3 is positioned only along the inner surface of the bellows-like mesh pipe 2. (2) The bellows-like electrical conduit according to claim 2, wherein the synthetic resin tape 3 is positioned only along the outer surface of the bellows-like mesh pipe 2. (2) The bellows-like electrical conduit according to claim 2, wherein the synthetic resin tape 3 is placed along both inner surfaces of the bellows-like mesh pipe 2. (2) The bellows-like electric conduit according to any one of claims (2) to (2) of the claims registered as a utility model, wherein the synthetic resin tape 3 is integrally joined to the surface of the bellows-like mesh pipe 2 by heat fusion or adhesion. . ■ The thickness of the synthetic resin tape 3 is 0.1~
The bellows-shaped electrical conduit according to any one of claims 2 to 2 of the utility model registration claim, which is 2 mm.