JPH0446982Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] This invention relates to an insulated trolley wire suitable for small rated applications.

[Background technology]

Insulated trolley systems provide electricity to moving equipment such as hoists and cranes.

As shown in FIG. 2, the insulated trolley wire 5 is attached to a hanger 7 fixed to a construction material 6, and tightened by terminal tightening insulators 8 at both ends. Terminal tightening insulator 8
is attached to the terminal tightening bracket 9. The power supply is
Power is supplied to the terminal tightening insulator 8 through the power supply line 10, and power is supplied to the mobile device via the current collector 11 that is in sliding contact with the insulated trolley wire 5.

As shown in FIG. 4, the insulated trolley wire 5 includes a plurality of rectangular conductors 12 that are integrally covered with an insulating coating 13 with one side exposed.

As shown in FIG. 3, the insulated trolley wire 5 and the terminal tension insulator 8 are connected by cutting off the insulation coating 13 and fixing the exposed conductor 12 to the terminal tension insulator 8 with a fixing screw 14.

However, this conventional insulated trolley wire 5 has the following problems. The rated current value of the insulated trolley wire 5 is determined by the cross-sectional area (a×b) of the conductor 12 shown in FIG. Since the insulated trolley wire 5 with a large rating has a large cross-sectional area, sufficient tightening strength of the conductor 12 can be obtained even when the fixing screw 14 is passed through and fixed as shown in FIG. For smaller ratings, as shown in Figure 5, conductor 12
Make it thin so that the thickness of is a′. However, when the thickness of the conductor 12 is reduced in this way, when the structure of fixing it to the terminal tightening insulator 8 as shown in FIG.
Since the conductor 12 is usually made of a copper plate having high conductivity and excellent corrosion resistance, it also lacks tensile strength. Therefore, a fixing structure using fixing screws 14 could not be adopted, and an insulated trolley wire with a small rating could not be realized.

[Purpose of invention]

The purpose of this invention is to provide an insulated trolley wire that can have a small rated current value by reducing the cross-sectional area of the main conductor without causing a lack of tensile strength.

[Disclosure of invention]

The insulated trolley wire of this invention has a rectangular cross-sectional shape and is formed by overlapping a main conductor and a reinforcing conductor of the same width. The main conductor is made of a material with high conductivity and is used on the exposed side of the insulation coating. The reinforcing conductor shall be made of a material with high tensile strength.

According to this configuration, the tensile strength is maintained by the reinforcing conductor, so the main conductor may have a small tensile strength. Therefore, the cross-sectional area of the main conductor can be reduced to provide a small rated current value.

Embodiment An embodiment of this invention is shown in FIG. In this embodiment, a reinforcing conductor 2 of the same width b is superimposed on the back side of a rectangular main conductor 1, the surface of the main conductor 1 is exposed, and the main conductor 1 and the reinforcing conductor 2 are covered with an insulating coating 3. It is something. This coating is done by simultaneous molding. The main conductor 1 is made of a material with high conductivity, for example copper. The reinforcing conductor 2 is made of a material with high tensile strength, such as an iron plate.

According to this configuration, the tensile strength is maintained by the reinforcing conductor 2, so that the main conductor 1 only needs to have a small tensile strength. Therefore, the cross-sectional area of the main conductor 1 can be reduced to provide a small rated current value.

If the thickness d of the main conductor 1 and the reinforcing conductor 2 of this embodiment is the same as the thickness a of the conductor 12 of the insulated trolley wire 5 in FIG. A mold can be used. Therefore, there is no need to prepare a new mold, and costs can be reduced.

[Effect of idea]

The insulated trolley wire of this invention includes a main conductor with high conductivity, a reinforcing conductor having high tensile strength and provided on the back side of the main conductor, and a reinforcing conductor with the surface of the main conductor exposed. Since the conductor is equipped with an insulating coating that covers the conductor, the tensile strength can be borne by the reinforcing conductor, so the cross-sectional area of the main conductor can be made small and the rated current value can be reduced without causing a lack of tensile strength. It has the effect of being able to Also,
Since the cross-sectional shapes of the main conductor and the reinforcing conductor are rectangular with the same width, the main conductor and the reinforcing conductor can be overlapped and molded simultaneously, improving productivity. Furthermore, since the cross-sectional shape of the conductor is rectangular with the same width as described above, the structure of the terminal tightening insulator is simplified as in the conventional example.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of this invention, Fig. 2 is a perspective view of a conventional insulated trolley wire system, and Fig. 3 is a perspective view of an embodiment of the invention.
The figure is a sectional view of the terminal tightening insulator, FIG. 4 is a perspective view of a conventional insulated trolley wire, and FIG. 5 is a perspective view of another conventional insulated trolley wire. 1...Main conductor, 2...Reinforcement conductor, 3...Insulating coating.

Claims (1)

[Scope of utility model registration request] A main conductor with high electrical conductivity, a reinforcing conductor having high tensile strength and provided overlappingly on the back surface of the main conductor, and an insulating coating covering the main conductor and the reinforcing conductor with the surface of the main conductor exposed. An insulated trolley wire, characterized in that the main conductor and the reinforcing conductor have rectangular cross-sectional shapes with the same width.