JPH059940Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present application relates to an ear in a hanger ear for overhead contact lines used when suspending contact wires along electric train tracks.

[Conventional technology and problems]

The ears in conventional overhead line hangers are made of metal, and are attached to the lower part of an inverted U-shaped hanger made of metal with bolts, nuts, etc., and this hanger is suspended from the overhead line.

However, according to the above-mentioned known hanger, since both the hanger and the ear are made of metal, a circulating current flows due to the potential difference between the contact wire held by the ear and the hanging wire, causing a disconnection between the hanger and the hanging wire. Electrolytic corrosion occurred at the contact point with the wire, leading to breakage of the suspension wires and melting of the hangers, resulting in a lack of durability.Furthermore, the wires were heavy and inconvenient to handle.

[Purpose of the invention, examples and effects]

Therefore, in this application, the contact wire locking part in the ear, which requires the most mechanical strength, is made of ceramics with extremely high mechanical strength, and the other parts are made of ceramics that are easy to mold and have excellent impact resistance. This ear is made of synthetic resin, which eliminates the defects of the conventional one.The example is explained in detail with reference to the drawings.This ear consists of two block-shaped clamping pieces 1 and 2 as in the conventional one; A fitting groove 3 having an arcuate cross section along the width direction is formed on the upper inner surface of the holding piece 1, and a fitting protrusion 4 having an arcuate cross section along the width direction is formed on the upper inner surface of the other holding piece 2. They are provided respectively. In addition, slightly elongated insertion holes 6a, 6 through which the bolts 5 are inserted are inserted into the approximately central portions of the clamping pieces 1 and 2.
b, respectively, and a recessed portion 8 into which the lower end of the hanger 7 formed in an inverted U shape is fitted is formed on the outer surface.

In the present invention, in the clamping pieces 1 and 2 configured as described above, the hook-shaped locking portions 10a and 10b that lock into the locking grooves 9a and 9b of the contact wire 9 are made of ceramics with high mechanical strength, such as zirconia. The other parts 11a and 11b are made of, for example, a nylon-based or silicone-based synthetic resin. The case is shown in which these are embedded in the other parts 11a and 11b, respectively. In the figure, 13 indicates a nut, 14 a washer, and 15 a hanging wire.

Therefore, when in use, the lower ends of the hangers 7 are fitted into the concave portions 8 of the clamping pieces 1 and 2, and the fitting projections 4 of the clamping pieces 2 are fitted into the fitting grooves 3 of the clamping pieces 1. The clamping pieces 1, 2 and the lower end of the hanger 7 are tightened and fixed, and when the clamping pieces 1, 2 are tightened and fixed, the locking parts 10a, 10b are inserted into the locking groove 9 of the contact wire 9.
a, 9b.

[Effect of idea]

As described above, according to the present application, the locking part in the ear, which requires the highest mechanical strength, is made of ceramics, and the other parts, which make up most of the ear, are made of a material that is easy to mold and has excellent impact resistance. Each part was made of resin, and the support piece provided at the locking part was embedded in the other part to make the bond between the two strong, resulting in an ear that is excellent electrically and mechanically. In addition, there is no risk of circulating current occurring between the suspension wire and the contact wire, and therefore, it has advantages such as being excellent in durability, and being lightweight and convenient to handle.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a partially cutaway overall front view, FIG. 2 is a side view of the same, and FIG.
The figure is a front view showing the state of use. In the figure, 1 and 2 are holding pieces, 5 is a bolt, 7 is a hanger, 9 is a contact wire, 9a and 9b are locking grooves, and 10
Numerals a and 10b are locking portions, 11a and 11b are other portions, 12 is a support piece, 13 is a nut, and 15 is a hanging wire.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An electric train that is attached to the lower end of a hanger suspended from an overhead wire with a bolt and nut, and has a locking part that locks with a locking groove of a contact wire at the lower end. In the wire hanger ear, the locking part is made of ceramics, the other parts are made of synthetic resin, and the support piece provided at the locking part is embedded and integrated into the other part. An insulating ear in a hanger for overhead contact lines, which is characterized by: (2) An insulating ear in a hanger ear according to claim 1, wherein the ceramic is made of zirconium and the synthetic resin is made of nylon or silicone. (3) An insulating ear in a hanger ear for overhead contact lines as set forth in claim 1 or 2 of the utility model registration claim, which comprises a support piece embedded in a resin portion extending from the locking portion.