JPS589440A - Cross type inductive radio transmission line - Google Patents

Abstract

PURPOSE:To simplify the structure and to realize the production cost for the titled transmission line, by coating a dielectric tape having the follow-up performance to the recesses and projections of a conductor pair with a dielectric sheath. CONSTITUTION:An aggregate of the conductor pairs is formed by crossing a conductor 13 to a dielectric tape 10 with a proper pitch. A dielectric tape 11 is stuck to the tape 10 to obtain a certain length as well as to keep the form of the conductor pair. For the tape 11, it is essential to use a pressure sensitive adhesive tape having the follow-up performance to the recesses and projections in order to maintain the form of the conductor pair. As a result, a conventional unit plate obtained by the injection molding is eliminated to simplify the structure and to reduce the production cost.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to the structure of a crossed guided wireless transmission line.

BACKGROUND OF THE INVENTION In order to detect the running position of a moving object such as a vehicle or a crane, or to transmit data between the moving object and a ground base, a cross-shaped guided wireless transmission line is provided along the traveling path of the moving object. Conventionally, such cross-shaped inductive wireless transmission lines were assembled on-site by manually hooking coated wires, which serve as conductor pairs, to pins set at a fixed pitch, but this method was difficult to work with and required a lot of labor. It was.

Therefore, as shown in Fig. 1, an injection-molded unit plate 3 made of a dielectric material is prepared and has a pair of vertical grooves 1 for storing longitudinal electric wires and a transverse groove 2 as a wire crossing path leading to the vertical grooves 1. As shown in FIG. 2, a plurality of unit plates are connected to a belt 4 to form a combined body of unit plates, and one or more conductor pairs 5 are formed in both grooves 1.2 in this combined body. As shown in FIG. 3, a cross-type guided wireless transmission line covered with a dielectric sheath 6 and a protective tape 7 was devised, which significantly improved workability. However, since it uses an injection-molded unit plate with a complicated structure as shown in Figure 1, and connects it to belts 4, etc., to form a line of a certain length, it is expensive. The problem is, as the demand for this type of line has increased in recent years, there has been a desire for something cheaper.

The present invention has been made in view of these circumstances.
The purpose is to provide a cross-type guided radio transmission line that is cheaper than the conventional one (to simplify the structure while maintaining the same functions as the conventional one). Examples will be described in detail below.

FIG. 4 is an external perspective view showing the structure of an assembly of conductor pairs forming a part of the transmission line of the present invention fi, 10.11 is a dielectric tape, 12 is a protrusion provided on the dielectric tape 10. ,
Or a hole generated during manufacturing, or a 131d' conductor. Note that the dielectric tape 11 is shown as transparent for convenience so that the internal structure of the transmission line becomes clear.

As shown in the figure, the assembly of conductor pairs in this example is made of paperboard, polypropylene, PVC (polyvinyl chloride),
One or more pairs of conductors 13, which are coated electric wires that are the core wires of the transmission line, are formed on a dielectric tape made of polyester or the like, crossing each other at an appropriate pitch, for example, at a constant pitch, and the shape of the formed conductor pairs is maintained. For this purpose, dielectric tape 11 made of paper, polypropylene, polyester, etc. is pasted together to form a continuous length. In the conventional configuration (3), this assembly of conductor pairs corresponds to that shown in FIG.

Since the dielectric tape 11 is only used to maintain the shape of the conductor pair, it is necessary to use an adhesive tape that can follow irregularities. The conductor pair used is a covered electric wire or enameled wire insulated with a dielectric such as polyethylene PVC, nylon, fluorocarbon resin, or Teflon (registered trademark).

FIG. 5 is an external perspective view showing another embodiment of an assembly of conductor pairs, in which a dielectric tape 14 of paperboard, polypropylene, PVC, polyester, etc. is further superimposed on the assembly of conductors shown in FIG. It has a vertically symmetrical structure.

In addition, the dielectric tapes 10 and 1 in FIGS. 4 and 5
4 has a certain degree of rigidity so that the width and shape of the conductor pair formed in order to uniform the transmission characteristics of the transmission line and increase position detection accuracy, and is sufficient to withstand tensile damage during manufacturing. It is desirable that the material has sufficient strength. Further, in order to reduce the cost, it is highly desirable to reduce the interval l between the conductor pairs to about 30 to 150 plates.

FIGS. 6 to 8 are perspective views of different embodiments of the transmission line of the present invention, in which the assembly of the conductor pairs shown in FIG. 4), the same reference numerals as in FIG. 4 indicate the same parts, and reference numeral 21 indicates a rope. The transmission line shown in FIG. 6 has the following advantages: reducing the length change of the conductor pair assembly when extruding the dielectric sheath 20 with an extruder, increasing the tensile strength required when laying the transmission line, and temperature expansion and contraction after laying the transmission line.
The structure is such that the metal or resin rope 21 has the function of reducing the amount of deflection due to wind pressure loads, etc. The rope 21 is attached vertically to the conductor pair assembly during manufacturing, and is integrated with the dielectric cous 20. It has become. In Fig. 6, two O-ops 21 are provided on both sides of the assembly of conductor pairs, but in order to provide flexibility in terms of the functionality of the installation surface 1, as shown in Figs. 7 and 8, It is also possible to use only one rope or no rope at all. It is of course possible to replace the conductor pair assembly shown in FIGS. 6 to 8 with that shown in FIG.

FIG. 9 is an explanatory diagram of the configuration of a manufacturing apparatus for extrusion molding the dielectric sheath 20, in which the conductor pair assembly 30 shown in FIG.
After the dielectric material 20 is coated with the extruder and cooled in the water layer 34, the transmission line 35 of the present invention is wound onto a winding drum.

As can be seen from the above description, the present invention uses a dielectric adhesive tape or the like to fix one or more pairs of conductors formed on a dielectric tape and intersecting at an appropriate pitch so that the shape can be maintained. It is an assembly of conductor pairs] and has a simple structure that does not use injection molded unit plates as in the past, reducing production costs and providing an inexpensive cross-shaped inductive wireless transmission line. It becomes possible to do so.

[Brief explanation of the drawing]

Figures 1 to 3 are structural explanatory diagrams of a conventional crossed type inductive wireless transmission line, Figures 4 and 5 are perspective views of an assembly of conductor pairs, and Figures 6 to 8 are diagrams of the structure of the present invention. FIG. 9 is an explanatory diagram of the configuration of the transmission line manufacturing apparatus of the present invention. 14 is a dielectric tape, 12 is a protrusion or hole, 13 is a conductor, 20 is a dielectric 7, and 21 is a rope. Patent Applicant Sumitomo Electric Industries Co., Ltd. Representative Patent Attorney Hisashi Tamamushi Gobu (7) 207-

Claims (1)

[Claims] One or more pairs of conductors formed on a dielectric tape that intersect with each other at an appropriate pitch, and unevenness bonded to the dielectric tape via the conductor pair so that the shape of the conductor pair is maintained. A cross-shaped inductive wireless transmission line characterized by comprising a collection of long conductor pairs made of trackable dielectric tape and covered with a dielectric sheath.