JPH05270302A - Rigid electric line for electric railcar - Google Patents

Abstract

PURPOSE:To provide a compact rigid electric line for an electric railcar where troubles of electrolytic corrosion and of feeding ability can be dissolved, and a trolley wire can be simply attached with its posture kept accurately. CONSTITUTION:A frame 2 having about T-shaped section is made of copper or copper alloy. A trolley wire 1 is steadily supported at three points in its cross section, namely two points where a pair of locking recesses 9, 9 abut on the locking pawl 15 of the frame 2 and the sandwichedly holding pawl part 27 of a lug 6 and one point where a curved convex face 12 abuts on the abutted face 13 of the frame 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rigid train line that is laid parallel to a track for supplying electricity to a running train or the like.

[0002]

2. Description of the Related Art Conventionally, aluminum or an alloy thereof has been used as a cradle in a rigid power line consisting of a cradle having a substantially T-shaped cross section and a copper trolley wire.

Therefore, there is a problem of electrolytic corrosion and a problem of feeding property.

Therefore, in order to prevent the above-mentioned electrolytic corrosion, an insulating coating is applied to a part or the whole of the pedestal corresponding to the trolley wire, and in that case, the feeding property and the current collecting property are further improved. It causes the problem of making it worse.

As another measure for preventing electrolytic corrosion, plating is applied to the trolley wire, but this is not a fundamental solution and there is a problem that the cost of the trolley wire increases.

Further, in a structure in which a dolly-shaped trolley wire having a V-shaped locking concave groove is used to attach this to a frame, one locking groove has a locking claw portion at the tip of the frame. The holding claw portions of the ears were engaged with the other locking groove, respectively, and held in a holding shape at two points as seen in a cross section.

As a result, the trolley wire is slightly twisted, and the trolley wire is slightly corrugated, which causes problems in the mounting posture.
Combined with poor feeding, it was a cause of abnormal wear such as local wear and wavy wear due to current collection.

The object of the present invention is to solve the problem of electrical conductivity during galvanic corrosion, to ensure that the trolley wire is not twisted, does not undulate, and can be mounted securely and easily in a normal posture. It is to provide a compact rigid train line with improved current collection.

[0009]

A rigid body electric wire according to the present invention comprises a gantry having a substantially T-shaped cross section, a trolley wire attached to the tip of the gantry, and an ear for holding the trolley wire on the gantry. The mount is made of copper or a copper-based alloy, and the contact surface facing toward the distal end, the locking claw portion formed on the distal side of the contact surface, and the base end of the ear are in contact with each other. The ear, which has a contacting sloped surface and is attached to the gantry by a fastener, cooperates with the locking claw portion of the gantry while engaging with the pair of locking concave grooves of the trolley wire. The gripping claw portion for holding is provided at the tip, and the trolley wire is pulled toward the base end side by colliding with the sloped surface of the pedestal in cooperation with the sloped surface to form the curved convex surface of the trolley wire. The trolley wire has a sloping surface at the base end that is brought into pressure contact with the abutment surface of the frame, and the trolley wire has a pair of locking concave There was configured with two points brought into contact with the locking claw part and the clamping claw portion, at a total of three points of one point the curved convex surface abuts against the abutment surface of the frame, is maintained.

[0010]

[Function] Since the gantry is made of copper or copper-based alloy similar to the trolley wire, there is no risk of electrical corrosion, and the positive current sharing of the gantry provides good feeding and current collecting properties, and Can be miniaturized.

When the ear is fastened to the mount with the fastener, the inclined surface of the base end of the ear slides on the inclined surface of the mount,
The ear moves toward the base end. Along with this, the holding claw portion at the tip of the ear draws the trolley wire toward the base end direction, and the base end portion of the ear comes into contact with the stepped portion of the gantry and converges with an appropriate tightening value.

Since the pedestal has the abutting surface facing toward the tip, the ear can strongly press the curved convex surface of the trolley wire against the abutting surface of the gantry, and the trolley wire is not twisted. Does not occur.

After all, the trolley wire is firmly held in a stable and stable posture at one point on the base end side and two points on the left and right sides in the transverse section.

[0014]

EXAMPLES Examples will be described below in detail.

In the embodiment shown in the sectional views of FIGS. 1 or 2 and 3, 1 is a trolley wire, made of copper or a copper alloy, and 2 is made of copper or a copper alloy having a substantially T-shaped cross section. It is a pedestal.

This pedestal 2 has a flange portion 3 attached to an insulator (not shown) at the base end (upper end in the figure) side, and an ear attachment bulge portion 4 at the tip side, and between the both. Web 5
Are connected to each other and are integrally formed by an extrusion mold material or a subsequent cold drawing process.

Reference numeral 6 denotes an ear for holding the trolley wire on the pedestal 2, which is made of copper or a copper alloy and is manufactured by an extrusion mold material or a subsequent cold drawing process.

Reference numeral 7 denotes an ear fastener composed of a hexagon socket button bolt 7a, a tubular nut 7b, etc., which is provided at the bulging portion 4 of the gantry 2 in a direction orthogonal to the gantry center plane P. As shown in FIG. 1, the ear 6 is inserted into the hole 8 and is only on one side.
Or a pair of ears 6, 6 on both sides as shown in FIG.
It is attached to the pedestal bulging portion 4.

The trolley wire 1 has a pair of Vs on both left and right sides of the drawing.
A small fan-shaped portion on the base end side, which has a V-shaped locking groove 9
It is a substantially daruma shape that combines 10 and the large fan-shaped part 11 on the tip side.

Therefore, the trolley wire 1 has a curved convex surface 12 on the base end side (on the upper side in the drawing).

Therefore, the pedestal 2 has the lower end surface of the bulging portion 4 as the contact surface 13 on which the curved convex surface 12 of the trolley wire 1 is abutted. That is, the gantry 2 has an abutting surface 13 that faces the tip direction (downward in the figure).

Further, a projecting ridge portion 14 having a small triangular cross-section is continuously provided on the tip side of the contact surface 13 so as to be inserted into the engaging recess groove 9 inside the trolley wire 1. Form 15, 15.

A pair of longitudinal recesses 16 and 16 are formed on the lower surface of the flange portion 3, the web 5 and the upper surface of the bulging portion 4.
Is a joint splicer made of copper or copper alloy from both sides.
17, 17 are inserted.

That is, as shown in FIG. 5, a predetermined length--
-For example, the joint splicer 17 is arranged between the ends of the 6m-long pedestals 2 and 2, and the pedestals 2 and 2 are sequentially connected and arranged, and the continuous long trolley wire 1 is attached to this. Be done.

Reference numeral 18 is a caulking fastener, which is composed of a pin material having an independent concave-convex strip on its outer periphery, a collar having holes with an independent concave-convex portion to be caulked into the pin material, and the like, and the joint splicer 17 described above. And the web 5 at the end of the gantry 2
The pair of joint splicers 17 and 17 are strongly attracted and fixed to each other by being inserted in a skewered shape into the hole of the.

However, inclined surfaces 19 and 20 are formed near the center plane P of the base end surface (upper surface in the figure) and near the center plane P of the tip end surface (lower surface in the figure) of the joint splicer 17. ..

Further, in the gantry 2, inclined surfaces 21 and 22 are formed on the lower surface of the flange portion 3 closer to the central surface P and on the upper surface of the bulging portion 4 closer to the central surface P.

In this way, with the caulking fastener 18, the pair of joint splicers 17, 17 are strongly attracted and connected (see FIG. 1), and the inclined surfaces 19, 20 of the joint splicer 17 are connected. However, by pressure contacting the inclined surfaces 21 and 22 of the pedestal 2,
In the sectional view, the joint splicers 17, 17 are wedge-shaped and are pushed into the longitudinal recess 16 of the gantry 2 from both sides.

In this way, as shown in FIG. 5, the ends of the adjacent pedestals 2 and 2 are connected in a straight line so as to form a straight line, and with respect to the external force from the vertical direction in FIG. , And shows extremely high rigidity and strength. At the same time, the electric resistance at the pedestal connection part is reduced, and the temperature rise can be prevented.

In particular, as shown in the right half of FIGS. 1 and 3, the web 5 and the inner surface of the joint splicer 17 are pressed against each other in a wedge shape so that a minute gap W is left between them. We are careful not to disturb things.

At the base end surface (upper surface in the figure) of the bulging portion 4 of the gantry 2, a stepped portion 23 parallel to the central plane P is formed outside the inclined surface 22 and further An outwardly sloping sloped surface 24 is continuously formed outward at a predetermined angle θ.

On the other hand, as shown in FIG. 4, a locking bent piece portion 25 is formed at the base end portion of the ear 6, and a contact surface thereof is a sloped surface 26 having a predetermined angle β. The sloped surface 26 is brought into contact with the sloped surface 24 of the gantry 2.

Furthermore, the ear 6 cooperates with the locking claw portion 15 of the pedestal 2 and has a holding claw portion 27 for holding the pair of locking concave grooves 9, 9 of the trolley wire 1 while holding the tip. Have.

Therefore, when the fastener 7 is tightened, the sloped surface 26 at the base end of the ear 6 moves in the direction of approaching the center plane P while slidingly contacting the sloped surface 24 of the pedestal 2, and the trolley wire 1 is The curved convex surface 12 of the trolley wire 1 is pulled toward the base end side (upward direction in the drawing) and press-contacts with the contact surface 13 of the pedestal 2 (from below in the drawing).

As is apparent from FIG. 3, a gap U is formed between the locking claw portion 15 of the gantry 2 and the inner surface of the locking groove 9 on the side of the large fan-shaped portion 11 of the trolley wire 1. , Again, year 6
A gap T is formed between the holding claw portion 27 and the inner surface of the engagement groove 9 on the side of the large fan-shaped portion 11 of the trolley wire 1.

Therefore, in the cross sections shown in FIGS. 3 and 1 and 2, there are two points at which the pair of locking concave grooves 9, 9 abut the locking claw portion 15 and the holding claw portion 27. In the present invention, one point, two points, etc. shall be counted including the surface contact, and one point at which the curved convex surface 12 contacts the contact surface 13 of the pedestal 2, It will be held with a total of 3 points.

Moreover, when the ears 6 and 6 are tightened to the proper values by the fastener 7, the inner end of the locking bent piece 25 of the ear 6 comes into contact with the stepped portion 23 of the gantry 2. , Over-tightening is regulated.

In this way, the trolley wire 1 is held most stably (in the cross section) at three points, and the trolley wire 1 is securely fixed (clipped) to the pedestal 2 in the correct posture.

The above angles θ and β are 8 ° to 8 °, respectively.
A range of 18 ° is preferred. Particularly, the range of 10 ° to 16 ° is optimal.

Next, referring to FIG. 5, the rigid work line installation work of the present invention will be briefly described in order. First, the gantry 2 is attached to the ceiling or wall of the tunnel through an insulator (not shown),
Next, joint splicers 17, 17 and caulking fasteners 18 ...
Then, it is connected to the adjacent pedestal 2.

After that, the trolley wire 1 is temporarily attached to the pedestal 2, and the trolley wire 1 is further attached by the ears 6 and the fasteners 7.
To the pedestal 2.

It is preferable that the end faces of the pedestals 2 and 2 are in contact with each other.

[0043]

The present invention has the following significant effects with the above-mentioned configuration.

The problem of electrolytic corrosion could be prevented and the problem of feeding property could be solved.

The whole can be made compact.

The trolley wire 1 is supported on the pedestal 2 in such a manner that it is supported at three points in the cross section, and is securely fixed in a normal posture without being twisted or wavy, so that Abnormal wear is suppressed.

Installation work of the trolley wire 1 can be simplified.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a modified example of the present invention.

FIG. 3 is an explanatory view of the shape, dimensions, etc. of the constituent material of the present invention.

FIG. 4 is a cross-sectional view of an example of an ear.

FIG. 5 is a front view of a main part.

[Explanation of symbols]

 1 Trolley wire 2 Frame 3 Flange part 4 Ear mounting bulge 5 Web 6 Ear 7 Fastener 9 Locking groove 12 Curved convex surface 13 Contact surface 15 Locking claw 16 Longitudinal recess 17 Joint splicer 18 Caulking Fastener 19 Inclined surface 20 Inclined surface 21 Inclined surface 22 Inclined surface 24 Inclined surface 27 Clamping claw W Small gap

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuji Nakajima 8 Nishinocho, Higashimukaijima, Amagasaki City, Hyogo Prefecture Mitsubishi Electric Wire & Cable Co., Ltd. (72) Nobuyuki Maekawa 8th Nishinomachi, Higashimukaijima, Amagasaki City, Hyogo Mitsubishi Electric Line Industry Co., Ltd.

Claims (1)

[Claims] 1. A gantry having a substantially T-shaped cross section, a trolley wire attached to the tip of the gantry, and an ear for holding the trolley wire on the gantry, the gantry being made of copper or a copper alloy. At the same time, it has a contact surface facing the tip direction, a locking claw portion formed on the tip side of the contact surface, and a sloped surface with which the base end portion of the ear contacts, and The ear attached to the pedestal has, at the tip, a holding claw portion that cooperates with the locking claw portion of the pedestal and that holds the pair of locking recessed grooves of the trolley wire while holding it. Of the trolley wire is brought into contact with the inclined surface of the trolley wire toward the base end side, and the curved convex surface of the trolley wire is pressed against the contact surface of the gantry. And the trolley wire has a cross-section in cross section, and a pair of locking concave grooves contact the locking claw portion and the holding claw portion at two points. A rigid train line, characterized in that the curved convex surface is held at a total of three points, one of which is in contact with the contact surface of the gantry.