JPH10203204A - Connecting structure of messenger and contact wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lead wire from coming into contact with a pantagraph due to hanging of the whole of the lead wire even if one side branch part is disconnected by branching the connection part with a contact wire in the lead wire into a plurality of branch parts. SOLUTION: A contact wire 2 is arranged in parallel on the lower part of a messenger 1 and the contact wire 2 is hung from the messenger 1 via a hanger and is supported. The messenger 1 and the contact wire 2 are connected by a pressure equalizing line 3 as a lead wire. One end side of the pressure equalizing line 3 is formed into a loop shape and this loop part is connected with the messenger 1 via a connector hardware 4. The one end and the intermediate part of the pressure equalizing line 3 are fixed by a binding tool 5, the other end is branched into forked ones and each branch end is connected to the contact wire 2 via a feeding ear 6. Thus, the pressure equalizing line 3 is improved, disconnection can be suppressed and loosening of a bolt can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a messenger and a trolley wire, and to a wire fastener best suited for this connection.

[0002]

2. Description of the Related Art Catenary suspension is widely used as a means for suspending trolley wires on railway tracks. In this method, a messenger is erected above the trolley wire, and the trolley wire is suspended from the messenger and supported. That is, the strut does not directly support the trolley wire, but has a structure that supports the messenger.

In this catenary suspension, a messenger
The trolley wire 41 and the trolley wire 42 are connected by a pressure equalizing wire 43 (lead wire). This connection structure is shown in FIG. As shown, one end of the equalizing line 43 is connected to a messenger 41 via a connector fitting 44.
And the other end is trolley wire via feeder 46
Connected to 42.

First, a connector fitting 44 is shown in FIG. The connector fitting 44 penetrates and tightens the two bases 47 with two bolts 48, and clamps the messenger 41 and the pressure equalizing line 43 between the two bases 47. A messenger 41 is provided on the inner surface of the base 47.
A groove 50 conforming to the diameter of the equalizing line 43 is formed in parallel. A nut 51 is screwed into the screw portion of the bolt 48 exposed through the base 47, and the bolt is
48 is prevented from loosening.

Next, a feed ear 46 is shown in FIG. The feed ear 46 also includes two bases 57 and two bolts 58
With a trolley wire between both substrates 57
Hold 42. Protrusions 60 that fit into grooves formed in the longitudinal direction of the trolley wire 42 are formed on the inner edges of the bases 57 so as to face each other. Further, one base 47 is provided with a clamp portion 63 for connecting to a pressure equalizing line. Clamp 63
Is cylindrical, and connects the feeder 46 and the pressure equalizing line 43 by inserting and compressing the equalizing line 43 inside.

[0006]

However, the above connection structure has the following problems. (1) The equalizing wire 43 is easily broken at the connection with the trolley wire 42. When the train runs, vibration is applied to the messenger 41 and the trolley wire 42, and the vibration is transmitted to the pressure equalizing line 43. The equalizing line 43 is usually formed by twisting 1.2 mm diameter strands, and is not so flexible. Therefore, when repeated bending or the like is applied by vibration, the equalizing line 43 may be disconnected. The number of disconnections is overwhelmingly near the clamp of the feed ear 46.

(2) The broken pressure equalizing line 43 hangs down and comes into contact with the pantograph. Trolley wire because one equalizing wire 43
When the wire is disconnected at the connection portion with 42, the equalizing wire 43 hangs downward from the connector fitting 44. Therefore, the hanging pressure equalizing line 43 comes into contact with the pantograph of the running train, and the pantograph may be damaged.

(3) Loosening of bolts due to vibration cannot be prevented. In the connector fitting 44, the nut 51 is screwed into the bolt 48, and the loosening is prevented by using the idling 52. However, a sufficient effect may not be obtained in some cases. In the feed ear 46, a spring washer 61 is provided between the head of the bolt 58 and the base 57.
, But loosening may still occur.

[0009]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention relates to a structure for connecting a messenger and a trolley wire through a lead wire. It is characterized by being branched. Here, the element diameter of the lead wire is desirably 1.2 mm or less. The flexibility is improved by reducing the element diameter of the lead wire, and disconnection due to vibration is suppressed.

[0010] Further, the most suitable fastener for connecting the messenger to the lead wire or for connecting the trolley wire to the lead wire is a fastener for holding the wire by fastening the base with a plurality of bolts. And a tongue washer interposed between the head of the bolt and the base, and the tongue washer is provided with a tongue piece substantially facing the side of the bolt head by bending. And In particular, it is preferable that a plurality of tongue pieces of the tongue washer are provided, and these tongue pieces are arranged such that, when bent, one of the tongue pieces substantially faces any one of the side surfaces of the bolt head.

[0011]

Embodiments of the present invention will be described below. FIG. 1 is an explanatory view showing the connection structure of the present invention. As shown, a trolley wire 2 is arranged below the messenger 1 in parallel, and the trolley wire 2 is suspended from the messenger 1 via a hanger (not shown) and supported. The messenger 1 and the trolley wire 2 are connected by a pressure equalizing wire 3.

Here, one end of the equalizing line 3 is formed in a loop shape, and this loop portion is connected to the messenger 1 via a connector fitting 4 (fastening fitting). In order to maintain the loop shape, one end of the equalizing line 3 and the intermediate
Fixed. Further, the other end of the equalizing wire 3 is branched into two branches, and each branched end is connected to the trolley wire 2 via a feed ear 6 (fastener).

First, the connector fitting 4 is shown in FIG. FIG. 1A is a front view, and FIG. 1B is a cross-sectional view. The connector fitting 4 penetrates two rectangular bases 7 with two bolts 8 and fastens the messenger 1 and the equalizing line 3 between the two bases 7.
And sandwich it. Two bolt holes 9 penetrate through the base 7, and a semicircular groove 10 that matches the diameter of the messenger 1 and the equalizing line 3 is formed in parallel on the inner surface of the base 7.

A disc spring 11 and a tongue washer 12 are used to tighten the connector fitting 4. The tongue washer 12 is formed by forming two bolt holes corresponding to the bolt holes 9 of the base in an elliptical metal plate and projecting a plurality of tongue pieces 12A to 12F on both sides (see FIG. 2A). ). The tongue pieces 12A to 12F are bent at approximately 90 ° to face either side of the bolt head, and prevent the bolt 8 from being loosened. In this example, six tongue pieces 12A to 12F
Was formed. FIG. 2 shows the tongue pieces 12A to 12F before bending. The arrangement of the tongues 12A-12F ensures that when folded, either tongue will generally face either side of the bolt head. In this example, 3
The two tongues were arranged at 45 ° intervals. The tongue washer 12 allows any side surface to be held down by any tongue piece regardless of the direction of the bolt head, so that the bolt 8 can be reliably prevented from loosening. Therefore, the nut used in the conventional connector fitting (see FIG. 5A) does not need to be used in the connector fitting of the present invention. Since the tongue washer itself is penetrated by the two bolts 8, it does not rotate with the bolts 8.

In order to connect the messenger 1 and the pressure equalizing line 3, two bases 7 are formed so that the surfaces on which the grooves 10 are formed face each other.
Messenger 1 and pressure equalizing line 3 between each groove 10
Between the loops. In this state, a disc spring 11 and a tongue washer 12 are first superposed and arranged on the front face of one of the bases 10, and these are penetrated together with the base 7 by bolts 8.
Then, the bolt 8 is screwed to the base 7 to fasten the base 7. When the tightening is completed, bend the tongue piece facing the side surface of the bolt head in the widest area when it is bent. In FIG. 2A, the tongue pieces 12A and 12F may be bent. Disc spring
The reason for using 11 is to prevent the bolt 8 from being loosened and to hold the wire (messenger 1 and pressure equalizing wire 3) more reliably even during vibration.

Next, the feed ear 6 is shown in FIG. FIG. 1A is a cross-sectional view, and FIG. 1B is a front view. The feeder 6 also has a structure in which two bases 27 are penetrated by two bolts 28 and fastened, and the trolley wire 2 is sandwiched between the two bases 27. The base body 27 is a rectangular plate-like body and has two bolt holes 29 formed therethrough. A trolley wire 2 is provided on the inner edge of the base 27.
The protrusions 30 that fit into the grooves formed in the longitudinal direction of are formed to face each other. Further, the feed ear 6 is provided with a forked clamp portion 33 for connecting to the branched pressure equalizing line 3. That is, each base 27 is provided with a clamp 33 for connection to the pressure equalizing line 3. Each clamp
Reference numeral 33 denotes a cylindrical shape, which connects the feeder 6 and the equalizing line 3 by inserting a branch portion of the equalizing line 3 and compressing the same.

A spring washer is used for tightening the feed ear 6.
31 and a tongue washer 32 were also used. The tongue washer 32 is the same as that used for the connector fitting 4. That is, one of the tongue pieces is bent by approximately 90 ° so as to face one of the side surfaces of the bolt head, thereby preventing the bolt from being loosened. The reason why the spring washer 31 is used is to prevent the bolt 28 from being loosened and to more reliably hold the wire (the trolley wire 2 and the equalizing wire 3) even during vibration.

To connect the trolley wire 2 and the equalizing wire 3,
A branch portion of the equalizing line 3 is inserted into each clamp portion 33 and compressed by a compressor (not shown), and the equalizing line 3 and the feed ear 6 are connected. Then, the grooves of the trolley wire 2 are sandwiched between the projections 30 with the two substrates 27 facing each other such that the surfaces on which the projections 30 are formed face each other. In this state, first, a spring washer 31 and then a tongue washer 32 are overlapped and arranged on the front surface of one of the bases 11, and these are penetrated together with the base 27 by bolts 28.
Then, the bolt 28 is screwed into the base 27 to fasten the base 27. When the tightening is completed, bend the tongue piece facing the side surface of the bolt head in the widest area when it is bent. In FIG. 3B, the tongue pieces 32A and 32F may be bent.

The equalizing wire 3 was formed by combining 34 wires having a diameter of 0.45 mm from 34 wires and combining the wires from 7 wires. Reducing the wire diameter of the strand improves the flexibility of the equalizing wire 3 and contributes to the suppression of disconnection by flexibly responding to repeated bending or the like during vibration. The wire diameter is 0.45-1.
Around 00 is appropriate. Further, the length of the branch portion is set so that even if one of the branch portions is disconnected and hangs down, the tip of the disconnected branch portion does not reach below the trolley wire. The branching of the equalizing line 3 was performed by dividing one into four wires and the other into three wires. The branch point of the pressure equalizing line 3 was compressed by a shrinkable tube 34 (see FIG. 1) so that the pressure equalizing line 3 was not dispersed.

In such a tightening structure, since the equalizing wire 3 is branched from the middle and the connecting portion with the trolley wire 2 is formed in two branches, one branch of the equalizing wire 3 is broken. (The two branches are hardly disconnected at the same time), and the other branch is connected to the trolley wire 2. for that reason,
The entire pressure equalization line does not hang down and come into contact with the pantograph. That is, even if only the broken branch portion hangs down, the tip thereof can be prevented from hanging down below the trolley wire 2, so that a contact accident between the pressure equalizing line 3 and the pantograph can be prevented.

Although the above description has been made with respect to the connection of the equalizing wire, the connection structure of the present invention can be applied to other lead wires connecting the messenger and the trolley wire. Further, the fastening fitting of the present invention is not limited to the above-described connector fitting and feed ear, and can be used for fastening connection of various wires.

[0022]

As described above, according to the connection structure of the present invention, the following effects can be obtained. (1) By reducing the diameter of a lead wire, its flexibility is improved and disconnection is suppressed. (2) By branching the connection portion of the lead wire with the trolley wire, even if one of the branch portions is broken, it is possible to prevent the entire lead wire from hanging down and coming into contact with the pantograph. Also,
When one of the branches is disconnected, the droop can be easily confirmed visually.

Further, according to the fastener of the present invention, loosening of the bolt can be reliably prevented. That is, by using a washer with a tongue, the tongue piece is bent to face the side surface of the bolt head, thereby preventing the bolt from being loosened. In particular, if the tongue pieces are arranged such that any of the tongue pieces face substantially any of the side surfaces of the bolt head when bent, the loosening of the bolt head can be prevented regardless of the direction of the bolt head. Further, the use of the tongue washer eliminates the need to use a nut for the bolt.

[Brief description of the drawings]

FIG. 1 shows a connection structure of the present invention, wherein (A) is a front view,
(B) is a side view.

FIG. 2 shows a fastening fitting (connector fitting) of the present invention (A).
Is a front view, and (B) is a sectional view.

3 (A) is a front view and FIG. 3 (B) is a cross-sectional view showing a fastener (feed ear) according to the present invention.

FIG. 4 is a front view showing a conventional connection structure.

5A and 5B show a conventional fastener, FIG. 5A is a sectional view of a connector, and FIG. 5B is a sectional view of a feed ear.

[Explanation of symbols]

 1,41 Messenger 2,42 Trolley wire 3,43 Equalizing wire 4,44 Connector fitting 5 Binding tool 6,46 Feed ear 7,27,37,47,57 Base 8,28,38,48,58 Volt 9, 29 Bolt hole 10, 50 groove 11 Belleville spring 12, 32 Tongue washer 12A to 12F Tongue 13, 63 Clamp 30,60 Projection 31,61 Spring washer 34 Shrink tube

Continuation of front page (72) Inventor Yoshiaki Mizuma 2-20, Toda, Kitagawara, Itami-shi, Hyogo Asahi Metal Seiko Co., Ltd.

Claims (4)

[Claims] 1. A connection between a messenger and a trolley wire in a structure for connecting a messenger and a trolley wire via a lead wire, wherein a connection portion of the lead wire with the trolley wire is branched into a plurality of parts. Construction. 2. A connection structure between a messenger and a trolley wire according to claim 1, wherein the wire diameter of the lead wire is 1.2 mm or less. 3. A fastener for clamping a base by a plurality of bolts to hold a wire, comprising a tongue washer penetrated by the bolt and interposed between a head of the bolt and the base. The tongue washer is provided with a tongue piece substantially facing the side surface of the bolt head by bending. 4. A tongue-washer comprising a plurality of tongues, the tongues being arranged such that, when bent, one of the tongues substantially faces either side of the bolt head. The fastener according to claim 3, wherein: