JP3319852B2 - Trolley wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley wire for supplying power to a mobile power feeding device.

[0002]

2. Description of the Related Art At unmanned factories and nuclear power plants, power is supplied to mobile devices such as working robots and inspection robots by using trolley wires by utilizing current collection technology.

FIG. 4 is a cross-sectional view of a conventional trolley wire (single product), and FIG. 5 is another conventional trolley wire (general-purpose integrated product).
FIG.

The trolley wire shown in FIG. 4 has two conductors 1 and 2 having a substantially U-shaped cross section held by insulating portions 3 and 4 and held by a hanger portion 5. A support bracket (not shown) for fixing to a member such as a ceiling or a wall of a factory is provided. The sliding surfaces (lower side in the figure) 1a and 2a of the conductors 1 and 2 are attached so as to be exposed from the insulating portions 3 and 4, respectively. Both conductors 1 and 2 are power supplies (not shown)
, And a current collector (not shown) of the mobile power feeding device comes into contact with the conductors 1 and 2 and slides to supply power to the mobile power feeding device.

[0005] Such a trolley wire is prepared by preparing two single-wire trolley wires 6 and 7, arranging them in parallel at a place where they are to be attached, and attaching them to a ceiling or the like by a hanger part 5.

Further, as shown in FIG.
In some cases, the conductors 8 and 9 are manufactured integrally by extrusion molding together with the insulating portion 10 (the hanger portion is omitted in the trolley wire shown in FIG. 5).

[0007]

However, factories and surveillance systems are being reduced in size, and the space occupied by the current collecting system such as trolley wires has been greatly restricted. Is also required to have a small radius of curvature.

However, if the trolley wire shown in FIG. 4 is to be reduced in size and to have a small radius of curvature, the method of laying two single linear trolley wires in parallel may bend in accordance with the radius of curvature of the curve. It is difficult,
There is a problem that the parallelism of the trolley wires is reduced.

Further, in the trolley wire shown in FIG. 5, it is practically impossible to bend on a horizontal plane with a small radius of curvature without deforming the cross-sectional shape because of the structure in which two conductors are arranged in parallel. .

An object of the present invention is to solve the above problems and to provide a trolley wire that can be laid even on a route requiring a small occupied space and a small radius of curvature.

[0011]

According to the present invention, at least one conductor is supported by an insulating portion and held by a hanger portion. In a trolley wire provided with a support fitting for fixing to a member, an insulating hanger body is formed by integrating an insulating portion and a hanger portion holding the insulating portion by resin injection molding except for a sliding surface of a conductor. In addition, a support fitting is embedded and integrated into the insulating hanger body at the time of injection molding so as not to come into contact with the conductor.

[0012]

According to the above construction, an insulating hanger is formed by integrating an insulating portion and a hanger portion holding the insulating portion by injection molding of a resin except for the sliding surface of the conductor, and the insulating hanger is formed on the insulating hanger. Since the support bracket was embedded and integrated during injection molding so as not to contact with the conductor, the spacing between the conductors was already adjusted to be parallel when laying the trolley wire, so multiple conductors will be parallel again Thus, there is no need to adjust the spacing between the conductors or bend the trolley wire, and it is possible to lay the wiring with high accuracy even on a route requiring a small occupied space and a small radius of curvature. Further, since the support fitting is embedded, the positional relationship between the hanger portion and the conductor is not adjusted, and the installation work can be performed efficiently.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1A is a side view of an embodiment of a trolley wire according to the present invention, and FIG. 1B is a sectional view taken along line AA of FIG.
(C) has shown the BB line sectional view, respectively. In this embodiment, a case of a DC two-wire type linear unit trolley wire will be described.

In FIGS. 1A to 1C, reference numerals 20, 2
Reference numeral 1 denotes a conductor made of, for example, copper (or another kind of metal) and is arranged in parallel. Reference numeral 22 denotes an insulating portion that supports and insulates the conductors 20 and 21. As a material of the insulating portion 22, a polycarbonate resin which is excellent electrically and mechanically is preferable. Grooves 20 a, 20 b, 21 a, 21 b are formed in both sides of the conductors 20, 21 in the longitudinal direction to prevent the conductors 20, 21 from falling off from the insulating portion 22. The lower sides of the conductors 20 and 21 are sliding surfaces 20c and 21c, which are exposed so that the current collector can contact and slide, and have grooves so that the current collector does not come off during sliding. Are formed in the longitudinal direction. On the upper side of the insulating portion 22, a plurality of hanger portions 24 in which insert fittings 23 as support fittings are embedded are formed in the longitudinal direction at predetermined intervals so as not to come into contact with the conductors 20 and 21, and the hanger portions 24 form wall members. To be fixed to a bracket (not shown) or the like.

That is, the insulating portion 22 and the hanger portion 24 are integrated by resin injection molding except for the sliding surfaces 20c, 21c of the conductors 20, 21 to form an insulating hanger body 25 and the insulating hanger. Conductors 20, 21 on body 25
The support fitting 23 is embedded and integrated at the time of injection molding so as not to come into contact with.

Next, the operation of the embodiment will be described.

Since the two conductors 20, 21 and the insert fitting 23 are both injection molded integrally with the insulating portion 22 made of resin, the parallelism between the conductors 20, 21 has already been adjusted at the time of installation. , Adjusting the parallelism again, attaching the insert fitting 23 to the insulating portion 22,
There is no need to adjust the positional relationship between the insert fitting 23 and the conductors 20 and 21, and the parallelism between the conductors 20 and 21 and the installation accuracy are not reduced, and the installation efficiency is improved.

FIG. 2 is a plan view of another embodiment of the trolley wire according to the present invention.

The difference from the embodiment shown in FIG. 1 is that the trolley wire is curved in the horizontal plane.

As shown in the figure, the trolley wire is formed by excluding the sliding surfaces of two parallel conductors (shaded by the insulating portion) 26 and 27 whose insulating portion and hanger portion are curved in a horizontal plane. An integrated insulating hanger body 28 is formed by resin injection molding, and an insert fitting 23 is embedded and integrated into the insulating hanger body 28 at the time of injection molding so as not to contact the conductors 26 and 27.

Thus, when the trolley wire is laid, since the trolley wire has a desired radius of curvature, it is not necessary to bend the conductors 26 and 27 in a horizontal plane or adjust the parallelism again. Even on a route where a small occupied space or a small radius of curvature is required, the cable can be easily laid without lowering the laying accuracy and parallelism.
For example, a conventional curved trolley wire has a radius of curvature of 3 m.
However, the radius of curvature of the curved trolley wire of this example could be about 35 cm.

FIG. 3 is a side view of still another embodiment of the trolley wire of the present invention.

The difference from the embodiment shown in FIG. 1 is that the trolley wire is curved in a vertical plane.

The trolley wire shown in the figure is made of resin except for a sliding surface of two parallel conductors 29 and 30 (shaded by the insulating portion), the insulating portion and the hanger portion being curved in a vertical plane. Insulating hanger body 31 is formed by injection molding, and insert fitting 23 is embedded and integrated into insulating hanger body 31 during injection molding so as not to contact conductors 29 and 30.

This eliminates the need to bend the trolley wire in a vertical plane when laying the trolley wire, and can easily lay the trolley wire on a route requiring a small occupied space and a small radius of curvature without lowering the laying accuracy and parallelism. can do.

As described above, according to the present embodiment, an insulating hanger body is formed by integrally molding an insulating portion and a hanger portion holding the insulating portion except for the sliding surface of the conductor by injection molding of a resin. Since the support bracket is embedded and integrated into the hanger body during the injection molding so as not to come into contact with the conductor, it can be laid even on a route requiring a small occupied space and a small radius of curvature.

In this embodiment, the case where the number of conductors of the trolley wire is two has been described. However, the present invention is not limited to this, and the number of conductors may be one or three or more. The trolley wire shown in FIGS. 2 and 3 has seven hanger portions 24, but is not limited thereto. Further, although polycarbonate is used as the resin, an oil-resistant resin or the like may be used depending on the atmosphere to be used.

[0029]

In summary, according to the present invention, the following excellent effects are exhibited.

Since the insulating portion and the hanger portion are formed integrally by injection molding of a resin except for the sliding surface of the conductor, a supporting bracket is embedded and integrated into the insulating hanger body at the time of injection molding. It can be laid even on a route requiring a small occupied space or a small radius of curvature.

[Brief description of the drawings]

1A is a side view of an embodiment of a trolley wire according to the present invention, FIG. 1B is a sectional view taken along line AA, and FIG. 1C is a sectional view taken along line BB.

FIG. 2 is a plan view of another embodiment of the trolley wire of the present invention.

FIG. 3 is a side view of still another embodiment of the trolley wire of the present invention.

FIG. 4 is a sectional view of a conventional trolley wire.

FIG. 5 is a sectional view of another conventional trolley wire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20, 21 Conductor 22 Insulation part 23 Support bracket 24 Hanger part 25 Insulation hanger body

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hirofumi Okubo 5-1-1, Hidaka-cho, Hitachi City, Ibaraki Prefecture Inside the Hidaka Factory, Hitachi Cable Co., Ltd. (72) Inventor Shoji Kajiyama Hidaka-cho, Hitachi City, Ibaraki Prefecture 5-1-1, Hidaka Electric Wire & Cable Co., Ltd. (72) Inventor Keiji Tanaka 3-1-1, Sachimachi, Hitachi, Ibaraki Pref. Hitachi, Ltd. Hitachi Plant (72) Inventor Yutaka Yoneya Ibaraki 3-1-1, Sachimachi, Hitachi-shi Hitachi, Ltd. Hitachi Plant (56) References JP-A-7-205687 (JP, A) JP-A-56-51423 (JP, A) JP-A-52-5361 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60M 1/20 B60M 1/30

Claims (5)

(57) [Claims] At least one conductor is supported by an insulating portion and is held by a hanger portion.
In a trolley wire provided with a support fitting for fixing to a member such as a ceiling or a wall, the insulating portion and a hanger portion holding the insulating portion are integrated by injection molding of a resin except for a sliding surface of a conductor. A trolley wire, wherein an insulating hanger body is formed, and the supporting bracket is embedded and integrated into the insulating hanger body at the time of injection molding so as not to contact the conductor. 2. The trolley wire according to claim 1, wherein said conductor and said insulating portion are formed in a straight line. 3. The trolley wire according to claim 1, wherein said conductor and said insulating portion are formed in a curved shape. 4. The trolley wire according to claim 1, wherein the resin is a polycarbonate resin. 5. The trolley wire according to claim 1, wherein the resin is made of an oil-resistant resin.