JPS6285737A - trolley conductor - Google Patents

Abstract

PURPOSE:To obtain a stable current collecting face, in a trolley conductor formed by bending a metal band through roll forming, by forming a current collector contacting face at the band section between plural bending sections at the folding side of the metal band. CONSTITUTION:A trolley conductor 1 is formed with a sheet of metal band 2 composed of copper or alloy while having a superposed board section 3 formed by bending continuously and repeatedly in the longitudinal direction at the axial section slightly shifted from half width between the opposite edges along the metal band 2. One longitudinal side edge of said board section 3 or the folding section is formed into two superposed flanges 5 when stretching two folding sections while slightly inclining and the concave surface 7 between the opposite bending sections 4, 4 is employed as a current collector contacting face. While two hollow flanges 9 are formed through bending at the other longitudinal side edge of the board section 3 to superpose the side edge section 10 and the side edge 11 at one hollow flange section 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a trolley conductor using a metal strip that can be formed by roll forming.

[Conventional technology]

Traditionally, trolley conductors are made of metal strips that are bent and formed by roll forming.In order to reduce costs, a steel plate is used for the main body, and a highly conductive strip material such as a copper plate is attached to the trolley conductor. It has been proposed that the contact surface of the current collector is formed from a strip material.

(For example, Japanese Utility Model Publication No. 53-7400, Japanese Unexamined Patent Publication No. 59-1
See Publication No. 64233. ) In these conductors, the main body strip material and the collector contact strip material are each bent into a predetermined shape, and both side edges extending beyond the overlap of the main body strip materials are made to protrude outward from each other. The current collector contacting band material is integrally crimped to surround these protruding side edges.

[Problem that the invention seeks to solve]

In the trolley conductor having the above structure, the joint between the main body band and the current collector contact band is close to the current collector contact area, and vibrations caused by repeated sliding of the brush, which is the current collector, are directly applied. , they tended to weaken the electromechanical bond of both strips.

Problems that arise due to the joint structure of such composite strips are significant, for example, in the electrical connection between the main body strip and the current collector contact strip, which corresponds to a predetermined electrical capacity. Weakening of the bond may cause heating of the conductor due to poor contact, etc., or deformation of the current collector contact surface. In addition, since the main body band material and the current collector band material are different metal materials, if the bond weakens, the bonding surface of both band materials will shift due to the difference in elongation due to heat or the difference in bending rigidity, which may cause In this case, the conductor is distorted in the longitudinal direction like an undulation, which may significantly reduce the product value as a trolley conductor.

Furthermore, since the two strips are caulked together near the current collector contact surface formation section, the deformation strain caused by the caulking acts directly on the current collector contact surface section, making it difficult to form a uniform surface shape in the length direction of the conductor. Irregular unevenness was often generated, and it was impossible to hope for an improvement in current collection characteristics.

Conventionally, in order to solve these problems, measures have been taken to increase the bonding strength by adding unevenness to the bonding surfaces of both strips, interposing solder plating, etc. This makes manufacturing even more difficult and even worse, and even if these measures are taken, it is impossible to fundamentally solve the above-mentioned problems.

The present invention has been made in view of these problems of the prior art, and provides stable electrical and mechanical properties.
Moreover, it is an object of the present invention to provide a trolley conductor of this type that is easy to manufacture and contributes to low cost.

[Means for solving problems]

The trolley conductor of the present invention, which achieves the above-mentioned objects, uses a metal strip material and continuously folds and bends it in the length direction between both longitudinal edges of the material to form an overlapping plate portion. , a plurality of folded bent parts are formed in the folded part on one side with respect to the plate part, and a band between the folded bent parts forms a current collecting contact surface, and the folded part on the other side with respect to the plate part A plurality of folded bends corresponding to the above-mentioned plurality of folded bends are formed projectingly on one side edge of the side edge, and a side edge extending further through the folded bends is connected to the other side edge. It is made by abutting and engaging.

(Example〕 DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to the drawings.

FIG. 1 shows a typical structural example of the trolley conductor of the present invention.

The trolley conductor 1 in this example is formed by a single metal strip 2 made of copper or its alloy, and is slightly wider than 1/2 the width between both edges along the length of the strip 2. A two-sheet plate (web) 3 is formed by continuously folding back and bending in the length direction at the shifted axis line portion, and at the folded portion serving as one longitudinal side edge of this plate portion 3, By forming the two folded bent portions 4, 4 slightly inclined and overhanging, two flanges 5, 5 are formed by joining two pieces together, and the band portion 6 extending between the folded bent portions 4 and 4 is inwardly formed. It is concavely curved in a substantially square shape, and this concave curved surface 7 serves as a contact surface for the current collector.

At both side edge portions of the strip material 2, which are the other longitudinal side edges of the plate portion 3, the side edge portions on the minus side are bent so as to correspond to the folded bends of the current collector contact surface forming portions. Two hollow flanges 9.9 are formed by forming two folded bent portions 8.8 extending substantially at right angles to the plate portion 3;
The second or last folded bend 8 from the plate part 3 is
The other side edge portion 10 is bent at a substantially right angle and overhangs.
The side edge end 11, which extends further through the folded bent portion 8, is engaged with the other side edge portion 10 so as to circumscribe the other side edge portion 10.

The trolley conductor l made in this way can be continuously formed and produced using a roll forming machine, and can be used not only to produce short unit conductors but also to produce strips of arbitrary length using long strips. It can also be provided as a trolley conductor.

In such a trolley conductor 1, its cross-sectional shape is approximately a letter-shaped symmetrical shape, and the plate portion 3 and the flanges 5, 5, 9, and 9 on both side edges thereof each form two plate portions. However, the edges on both sides, which are most susceptible to deformation due to bending stress, are reinforced with triple layers, so
The bending rigidity of each part is approximately equal.

Moreover, since one folded bent part 8 inscribes the other side edge part 10 so as to wrap around it, the side edge end 11 passing through the folded bent part 8 exerts a winding force against the side edge part 10, and thus Even if the trolley conductor is wound into a spiral with the plate portion 3 parallel to the winding axis, there will be no deformation such as opening between both side edges.

As shown in FIG. 2, such a trolley conductor 1 is constructed by covering an insulating cover 12 by extruding a synthetic resin so as to leave a contact surface 7 concave in a substantially V-shape and insulating it. can do.

The opening 13 of the insulating cover 12 exposing the contact surface 7 is preferably defined by a pair of legs 14, 14 extending circumscribing the two folded bends 4, 4.

A current collector (not shown) passes between the pair of legs 14.14 and is brought into pressure contact with the contact surface 7. In this case, even if the current collector attempts to move in the width direction of the conductor, the contact surface 7 Since the current collector undergoes a so-called centering action of returning to the bottom, which is the center of the concave curved surface, there is no fear that the current collector will wear out the leg portion 14 by rubbing it.

Such an action is effective when the contact surface 7 is laid sideways and the current collector is likely to move downward under its own weight.

The trolley conductor 1 can also be constructed using a plurality of different metal strips instead of a single metal strip as in the above embodiment.

FIG. 3 shows an example of a trolley conductor formed from two metal strips 23, 33.

This uses a metal strip 23 made of steel or its alloy, and a metal strip 33 made of iron or its alloy (stainless steel, etc.). The surfaces are laminated, and the metal strip 23, preferably made of copper or its alloy, is bent and folded in the same shape as the embodiment described above so that the metal strip 23 is the outer surface.

The same or equivalent parts as in FIG. 1 are indicated by the same reference numerals, and the explanation of each part will be omitted.

In this way, by combining not only copper materials but also dissimilar metals with low conductivity and easily available metal materials, it is more economical and has various current carrying capacities than when made of copper alone. A suitable trolley conductor can be provided.

As can be seen from these examples, the trolley conductor of the present invention is not limited to a single strip material, but even when it is composed of a plurality of dissimilar metal strip materials, a highly conductive portion is provided on the entire outer surface of the trolley conductor. Therefore, the current collector contact surface 7
(For example, by attaching a clamp to the flange 9.9, which serves as a reinforcing part, and holding the plate part 3, a power supply connection with good electrical contact can be achieved. This can also be achieved by intermediate connection between the terminals of trolley conductors using joint fittings.

FIG. 4 shows a further modified example of the trolley conductor of the present invention, which differs from the above-mentioned embodiment shown in FIG.
At both side edge parts on the side opposite to the folded part of the strip material on the side where the collector contact surface 7 is formed, one of the widely extending side edges is formed into two folded bent parts 8' in the same way as on the side where the collector contact surface 7 is formed.
8' is formed to overhang and form two two-piece flanges 9.
', 9', and a side edge 11' extending further through the folded bent portions 8', 8' is abutted and engaged with the other side edge 10' which is not bent at all. .

Components that are the same as those in FIG. 1 are designated by the same reference numerals, and explanations of these components will be omitted.

In this case, the portion where both side edges gather also forms a double plate portion like the other portions.

If there is a concern about separation at that part, it is possible to interpose solder plating at the abutting parts of the edges on both sides and melt the solder plating to integrate them, or to integrate them by welding. It is also possible to add means such as applying uneven processing and interlocking.

The trolley conductor of the present invention can be made into various forms by further modifying the structure of the above-described embodiment while maintaining its basic form.

For example, in the current collector contact surface 7 forming portion, two folded bent portions 4, 4 are formed to protrude approximately at right angles to the plate portion 3 to form a flange, and a band portion between the two folded bent portions 4.4 is formed. A flat current collector contact surface 7 can be formed by making it straight.

In addition, the concave current collector contact surface 7 may be formed by a bowl-shaped concave process instead of having a substantially V-shape as in the previous example.

〔Effect of the invention〕

As explained above, according to the trolley conductor of the present invention, the current collecting contact surface is formed by the band portion between the plurality of folded bends on the folded side of the metal strip, so that the main body is made of a composite strip as in the past. It is possible to provide a stable current collecting surface that maintains its shape without twisting or other deformation due to their bonding, which occurs when a contact member is configured, and it is possible to dramatically improve current collecting characteristics. It is something.

In addition, since the joint is not formed in the vicinity of the current collector contact part and is joined at the part farthest from the contact part,
Since the joining can be made simple, and it can be manufactured by folding it into a single strip, manufacturing is extremely simple.

Furthermore, by folding and bending one strip, a joint is formed by abutting engagement of both side edges extending to the same side of the overlapping plate parts, and a current collector contact part is formed on the opposite side. Therefore, even if the current collector is a sliding object such as a brush, the influence of vibrations caused by it is small, and unlike the conventional joining of composite metal parts, there is no possibility of relative displacement due to heat. There is no need to worry, and a stable combination of opportunities can be achieved.

As such, it is easy to manufacture and is electrically and mechanically stable.
Moreover, the current collection characteristics are dramatically improved, and the practical effects are truly great.

[Brief explanation of drawings]

FIG. 1 is a perspective explanatory view showing a preferred structural example of the trolley conductor of the present invention, FIG. 2 is a cross-sectional view showing an example of an insulated trolley using the same trolley conductor, and FIGS. 3 and 4 are FIG. 7 is a cross-sectional explanatory diagram showing a modification of the trolley conductor of the present invention.

Claims (1)

[Claims] 1. An overlapping plate portion is formed by continuously folding and bending the metal strip material in the length direction between both longitudinal edges thereof, and On the other hand, the folded part on one side has a plurality of folded bent parts projecting out, and the band between these folded bent parts forms a current collecting contact surface, and the side edge end of the other side with respect to the plate part Then, a plurality of folded bent portions corresponding to the plurality of folded bent portions are formed projectingly on one side edge portion, and a side edge end further extending through the folded bent portions is abutted and engaged with the other side edge end. A trolley conductor that is characterized by its ability to tighten. 2. The trolley conductor according to claim 1, which uses a single metal strip. 3. The trolley conductor according to claim 1, which uses two layers of metal strips made of different materials. 4. The trolley conductor according to claim 1, having a substantially I-shaped cross section.