JPS6127065Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the invention of a reinforcing tube, which is used for the purpose of insulating the electrical conductor wiring parts of various electrical appliances, electric or electronic equipment, their connecting parts, or the connecting parts of various objects. The present invention aims to provide a new reinforcing tube suitable for use for reinforcing purposes and aesthetic purposes.

Insulating tubes have long been used for the purpose of covering electrical conductor wiring and their connections in various electrical appliances and equipment. There are two types of tubes: one is a sleeve made of a braided material and impregnated with varnish (hereinafter referred to as a braided tube), and the other is one made by extruding resin, synthetic rubber, etc. using an extruder (hereinafter referred to as an extruded tube). In other words, because this braided tube generally has a thinner structural coating (varnish coating) than an extruded tube, its electrical insulation properties may decrease or deteriorate when bent or twisted, or under water or under high humidity conditions. It also has disadvantages such as a large number of steps such as sleeve braiding and varnish impregnation or application during manufacturing, resulting in high costs, and the use of a large amount of solvent, which causes many problems in terms of environmental hygiene, disaster prevention, and pollution. In addition, since extruded tubes are obtained by extrusion molding of monomers, their wall thickness is increased and the above-mentioned problems with braided tubes are improved, but on the other hand, they do not have sufficient mechanical strength. In addition, there is a high risk of electrical insulation failure due to cracks and pinholes after tube mounting, and short circuit accidents due to exposed conductors.
Furthermore, since the slipperiness in the internal hole is poor, workability is poor when inserting an electric conductor, and there are also disadvantages such as high damage due to punctures on the inner wall of the electric conductor such as a wire. In addition, both the above-mentioned braided tube and extruded tube have a certain degree of expansion and contraction, and the extruded tube has a particularly large expansion and contraction effect, so the mechanical tensile force must depend on the strength of the electrical conductor itself. .

The present invention overcomes the disadvantages of the conventional ones as mentioned above.
It was researched and devised to eliminate the drawbacks, and it has rigidity while maintaining appropriate flexibility, and has sufficient resistance against tensile force without stretching in the length direction. Furthermore, we have succeeded in obtaining a reinforcing tube that can be appropriately expanded in diameter and has desirable reinforcing properties.

That is, a specific embodiment of the present invention will be described with reference to the attached drawings. On the inner surface of a tube 1 made of plastic or synthetic rubber, natural or synthetic organic or inorganic fiber strips 2 are arranged linearly and independently along the axial direction of the tube 1, i.e., the individual fiber strips 2 are not connected to each other by braiding or connecting materials, and are bonded and integrated with the tube 1 layer. An electrical conductor 4 is inserted into the inner hole 3 thus formed for use.

In order to specifically manufacture the product according to the present invention as described above, when the above-described plastic or synthetic rubber is formed into a tube by an extruder, the above-mentioned fiber strip material is attached to the inner wall of the tube 1 during extrusion molding. By continuously supplying a plurality of fiber strips 2 or one strip of fiber material 2 to complete the forming, it is possible to properly bond and integrate the fiber strips 2 to the tube 1 without connecting them to each other. In some cases, by using the strip material 2 impregnated with varnish or the like, it is possible to further ensure the adhesion and integration. Regarding the product dimensions, it is important to obtain them appropriately according to each application.For example, alkali-free glass fiber strips 2 impregnated with silicone varnish are bonded to the inner wall surface of a tube 1 made of silicone rubber during extrusion molding. and the inner diameter is 1~5mm,
Especially 1~3mm, outer diameter 2~8mm, especially 2~5mm
You can get various products of different degrees.

According to the present invention as explained above, the fiber strips 2 are individually arranged on the inner wall surface of the tube 1 and are integrally bonded to the tube 1, so the fiber strips are non-stretchable. 2 functions as a protective layer and a sliding layer when inserted, making it easy to insert electrical conductors, etc., improving workability, and completely protecting the set electrical conductors from tensile stress. This ensures a stable electrical connection that will not be disturbed by external forces, and of course effectively maintains electrical insulation properties.Furthermore, the product has high dimensional accuracy and can withstand high temperatures and high humidity. It does not expand or contract even under abnormal environments, and is advantageous for cutting to a fixed length or using an automatic cutting machine, but each fiber strip 2 is independent and not connected in the circumferential direction of the tube 1. It exhibits a considerable diameter expansion effect in the radial direction, and therefore has the advantage of allowing the operation of inserting internal components such as the electrical conductor to be carried out freely, and there is no solvent volatilization during manufacturing, so the working environment can be improved. Make it safer,
Alternatively, since it requires a braided structure, it has the advantage of being able to be mass-produced and manufactured at a low cost, and is a highly effective device in terms of practical manufacturing.

[Brief explanation of the drawing]

The drawings show embodiments of the invention,
FIG. 1 is a perspective view showing an example of the product, FIG. 2 is an enlarged partially cutaway side view of a part of the product, and FIG. 3 is a cross-sectional view perpendicular to the axial direction. However, in these drawings, 1 is a tube;
2 is a fiber strip, and 3 is an inner hole.

Claims (1)

[Scope of utility model registration request] A reinforcing tube made of plastic or synthetic rubber, in which individual fibers are arranged linearly in the axial direction of the tube on the inner surface of the tube, and are integrally bonded to the tube layer.