JPH0219305Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to improvement of an insulated contact wire, and is particularly useful as a long insulated contact wire.

<Conventional Examples and Problems> As shown in FIG. 3, as an insulated contact wire, a strip conductor 1 is placed in the upper part of an insulating cover 2' (made of hard vinyl chloride, for example) which has a collector guide opening 21' in the lower part. ′ embedded therein is known. However, in this insulated trolley wire, the cross-sectional shape of the band-shaped conductor is rectangular, and as shown in FIG. Processing is difficult (vertical bending is likely to occur during horizontal bending).

By the way, if the cross section of the band-shaped conductor is made into an arc shape as shown in FIG. 4, it can be expected that the bending rigidity with respect to the X-axis will increase and the bending rigidity with respect to the Y-axis will decrease, as is mechanically clear. Therefore, it is effective in solving the difficulty of horizontal bending. However, in this case, the neutral line of bending with respect to the X-axis moves, and the bending strain at the top and bottom of the insulated contact wire relative to the bending moment in the This is disadvantageous when turning.

<Purpose of the invention> The object of the invention is to provide an insulated contact wire that can sufficiently reduce the movement of the neutral line of bending with respect to the X-axis and reduce the bending rigidity with respect to the Y-axis.

<Structure of the invention> That is, the insulated contact wire according to the invention is an insulated contact wire in which a band-shaped conductor is embedded in the upper part of an insulating cover having a current collector guide opening at the lower part. It is characterized in that the side portions are bent upward, and the cross section of the middle portion is shaped like an upwardly convex arc.

<Explanation of embodiments of the invention> The present invention will be explained below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a band-shaped conductor made of hard copper or copper-coated steel, and both side portions 11, 11 are bent upward, and the cross-sectional shape of the middle portion 12 is an upwardly convex arc.

Reference numeral 2 denotes an insulating cover (made of hard vinyl chloride, for example), which has a current collector guide opening 21 in its lower part, and the above-mentioned band-shaped conductor is embedded in the upper part of the cover.

<Effect of the invention> Figure 2 shows the upper end T and lower end L of the insulated contact wire.
(when the height dimensions of the insulated contact wires are the same) Rectangular conductor A (shown by a solid line) This rectangular conductor has a convex arc-shaped cross section on the upper side Arc-shaped conductor B (shown by a dotted line) ), a band-shaped conductor C (indicated by a dashed line) of the present invention, which is formed by bending both sides of this arc-shaped conductor upward, is relatively shown. Therefore, the bending rigidity with respect to the Y axis, which is regulated by bh ³ /12 (b is width, h is height), is higher for arc-shaped conductor B than for rectangular conductor A.
It is also clear that the strip-shaped conductor C of the present invention is small.

On the other hand, when the bending center of the rectangular conductor A is used as a reference for the bending moment in the It is also obvious that it is small. Therefore, the insulated contact wire according to the present invention, in which the band-shaped conductor of the present invention is embedded in the upper part of the insulating cover, has a higher bending rigidity with respect to the Y axis without changing the bending center than the conventional insulated contact wire. It is possible to reduce the imbalance between the bending rigidity with respect to the X axis and the bending rigidity with respect to the Y axis. Therefore, in the insulated contact wire of the present invention, the above-mentioned difficulty in horizontal bending due to the imbalance in bending rigidity can be effectively resolved.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an insulated contact wire according to the present invention, FIG. 2 is an explanatory diagram showing the bending rigidity of conductors with various cross-sectional shapes, and FIG. 3 is an explanatory diagram showing a conventionally known insulated contact wire. FIG. 4 is an explanatory diagram showing a conductor obtained by processing a conductor having a rectangular cross section into an arc shape. In the figure, 1 is a band-shaped conductor, 11, 11 are both side parts, 12 is a middle part, 2 is an insulating cover, and 21 is an opening for a current collector guide.

Claims (1)

[Scope of utility model registration request] In an insulated contact wire consisting of a strip-shaped conductor embedded in the upper part of an insulating cover that has an opening for a current collector guide at the bottom, both sides of the strip-shaped conductor are bent upward, and the cross section of the middle part is shaped like an upwardly convex section. An insulated contact wire characterized by having an arc shape.