JPH0530654B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) In a contact wire that supplies electricity to a running vehicle,
When there is a long line or multiple load equipment is installed on a single line, insulation sections are set to separate the electrical system and repair the equipment. The present invention relates to a section insulating device used for constructing an insulating section as described above.

(Prior art and its problems) Most conventional sectional insulating devices have a structure in which front and rear contact wires 10, 10' are connected by a single front insulating plate 40 made of FRP or the like, as shown in FIG. It is used.

However, in the structure shown in FIG. 8, during use, abrasion powder from the current collector of the running vehicle and abrasion powder from the contact wire adhere to the sliding surface 40c of the insulating plate 40.
This causes electricity to leak and the insulation function to deteriorate. As a countermeasure to this problem, grooves 41 are provided to allow the abrasion powder to escape into the grooves 41, but it cannot be said that the effect is perfect. Furthermore, in order to maintain sufficient insulation function, the length of the insulating plate may be increased, but replacement work is time-consuming and costs remain problematic.

In addition, in order to maintain perfect insulation function for a long time,
As shown in the figure (Utility Model Publication 55-1957), an insulating device has also been developed in which an insulating air gap g is simply provided between contact wires. The insulating device shown in FIG. 9 is more effective than the insulating device shown in FIG. 8 because it can significantly reduce the deterioration of the insulation function.

However, since the electricity is cut off only at the air gap G, for example, when the current collector transfers from the front contact wire 10 in a charged state to the rear contact wire 10' in a non-charged state, sparks frequently occur at the tip edge 10a of the front contact wire 1. On the other hand, the tip edge 10'a of the rear contact wire 10' suffers from severe mechanical wear due to the collision of the current collector. That is, the service life of the contact wire itself is still not completely satisfactory.

(Object of the invention) The present invention uses an insulating plate divided into two, and
By installing an air gap between the insulating plates and cutting off the electricity in two stages, one at the insulating plate part and the other at the air gap part, it is possible to maintain complete insulation function for a long time and also to maintain a sufficient lifespan of the contact wire. The purpose is to

(Means for Achieving the Object) In order to achieve the above object, the present invention is arranged on a contact wire mounting surface of a metal frame having a U-shaped cross section, and is provided with a pair of left and right fixed ears. In a sectional insulating device for clamped contact wires, the tips of the contact wires in the front and rear sections are opposed to each other with a gap between them, and a main insulating plate divided into two parts in the front and back is arranged between the tips of the contact wires, and A pair of front and rear section core metals, which are formed to have approximately the same U-shaped cross-sectional shape and integrally have a contact wire gripping portion, are arranged between each mount and the main insulating plate, and a core shaft portion is integrally attached to each section core metal. The core shaft portions are inserted and fixed into the front and rear frames respectively, and the sliding surface side portion of the front end of the front main insulating plate is sloped, and the sloped portion is connected to the sloped rear end of the front trolley wire. The tip of the front end is brought into contact with the rear edge of the front section core bar, and the rear main insulating plate is tilted at the sliding surface side, and the tilted portion is moved toward the rear. The sliding surface of the main insulating plate that contacts the slanted front end of the contact wire, the leading edge of the slanted rear end that contacts the front edge of the rear section core metal, and that slides against the current collector of the traveling vehicle. An air gap is provided between the front and rear main insulating plates, aligned approximately on the same plane as the power supply plane of the contact wire.

(Example) First, an example of a train track system equipped with a contact wire will be described with reference to FIG. 7. A pair of running road surfaces 2 are formed on a track section 1, and a pair of guide rails 3 are laid. For example, three contact wires 10 for three-phase alternating current are provided on one guide rail 3 via a contact wire support device 5. The electric train 6 is equipped with rubber wheels 7, sideways guide wheels 8, and a current collector 9. The rubber wheels 7 roll on the running road surface 2, and the guide wheels 8 roll along the guide rail 3 to collect current. The current collector shoe of the device 9 is in contact with the contact wire 10.

As shown in FIG. 4, the contact wire 10 is arranged at the tip of a stainless steel stand 11 having a U-shaped cross section, and is held between a pair of left and right fixed ears 12 made of copper base metal. and is fixed to the frame 11 with nuts 14. Frame 11
A flange 11e is formed on the end surface of the opening side, and a bottom plate 15 is fixed (for example, welded) to the flange 11e.

When configuring such a contact wire 10 with a certain section of insulating section, as shown in FIG. Separate and face each other,
Tips 10a, 10'a of each contact wire 10, 10'
, on the power feeding surface 10c, 10'c side (arrow U direction side)
An insulating device consisting of a pair of front and rear main insulating plates 20, 20' is disposed between the tip portions 10a, 10'a. The front contact wire 10 is a charged contact wire, and the rear contact wire 10' is a non-charged contact wire in an insulated section.

In FIG. 1, each of the front and rear main insulating plates 20, 2
0' is made of oak wood impregnated with oil,
are arranged one behind the other between the contact wires 10 and 10',
Each sliding contact surface 20c, 20'c is aligned with the same plane as the power supply surface 10c of the contact wire 10 or the like. Further, grooves 21 are formed in each sliding contact surface 20c, 20'c to release wear powder and dirt. Front main insulation board 2
A portion of the front end 20a of the contact wire 10 on the sliding surface 20c side is inclined so as to protrude forward as it goes toward the bottom plate 15 (the side opposite to the arrow U), and comes into contact with the inclined tip 10a of the contact wire 10. ing. The leading edge of the tip 20a is a stainless steel front section core bar 23.
It is in contact with the rear end edge 23b of.

The rear main insulating plate 20' has the same shape as the front main insulating plate 20, but is placed upside down so that the front and back are reversed. Therefore, the rear end portion 20'a becomes an inclined surface, and the inclined front end portion 1 of the rear contact wire 10'
0'a, and the rearmost edge thereof is in contact with the rear section core bar 23.

Further, the bottom plate 15 of each pedestal 11 extends to the edge portions of the main insulating plates 20, 20', and abuts the respective cut portions 20e, 20'e.

Stainless steel core shaft parts 23a, 23a are welded to the section core bars 23, 23, as shown in FIG.
It is inserted into the mount 11 at the front end and into the mount 11 at the rear in the figure. Further, the section core bars 23, 23 are formed to have a U-shaped cross section as shown in FIG. They are holding each other.

In FIG. 2, which shows a view in the direction of the arrows in FIG.
20'b are formed in an inclined shape so as to be parallel to each other, and an air gap G having a width d of 6 mm, for example, is provided between the tip portions 20b and 20'b.

Insulating side plates 26 made of FRP are disposed on both sides of the main insulating plates 20, 20', and are fixed to both sides of the main insulating plates 20, 20' with three bolts 27, 28, 28, respectively. Both insulating side plates 26 extend in the front-rear direction to both sides of the front and rear frames 11, and are fixed to the front and rear frames 11 together with the core metals 23, 23 by three bolts 30 at the front and rear.

A drain hole 33 that communicates with the air gap G is formed in the central part of the insulating side plate 26 in the front-rear direction. It communicates with the water drain groove 34.

Reinforcing side plates 31 made of stainless steel are arranged on both the front and rear sides of the insulating side plates 26, and are fixed to the pedestal 11 using the bolts 30 and the like.

In FIG. 6, which shows the negative cross section of FIG. 1, the main insulating plate 20 has a rectangular cross-section.

Next, the action and usage situation will be explained. 1st
The current collector shoe S of the electric train shown in the figure comes into contact with the power feeding surface 10c of the contact wire 10 and moves rearward along the contact wire 10. At the beginning of use, electricity is first cut off at the joint X between the tip of the front contact wire 10 and the tip 23a of the main insulating plate 23, and then completely cut off at the air gap G.

While the contact wire 10 is being used, abrasion powder from the contact wire 10 and abrasion powder from the shoe S may adhere to the sliding surface 20c of the main insulating plate 20 on the front side, or rain and dust may accumulate at the joint X. By this, the main insulating plate 2
Electricity begins to leak to 0.

However, in addition to the insulating effect of the main insulating plate 20 itself, the air gap G is formed between the front and rear main insulating plates 20, 20' to perform the main insulating effect, so that the insulation state is completely maintained. Furthermore, electricity is cut off in two stages at the joint X and the air gap G, and the electrical load on the joint X is small, so the occurrence of sparks at the joint X is greatly reduced.

In addition, some of the wear particles adhering to the sliding surfaces 20c and 20'c are collected in the grooves 21, which helps to prevent the insulation performance of the main insulating plate 20 from deteriorating.

Further, when rain enters the air gap G, it is removed to the outside through the water drain hole 33 of the insulating side plate 26, thereby preventing electricity from leaking in the air gap G portion.

Further, as in the illustrated embodiment, main insulating plates 20, 2
If oil-impregnated oak is used as 0', the lubricity when the current collector shoe slides on S will be extremely good, and the durability will also be improved.

When replacing the main insulating plates 20, 20', remove the six bolts 27, 28 in the center of FIG.
It is sufficient to pull out each main insulating plate 20, 20' in the direction opposite to arrow U. In addition, when mounting, the inclined tip portions 20a, 20'a of the main insulating plates 20, 20' are connected to the inclined tip portions 10a, 20'a of the contact wires 10, 10'.
10'a, the sliding surfaces 20c, 20c' are aligned with the power feeding surface 10c, and the screws 27 or the like are used to fix the power supply. In this case, the section core bar 23,
Finely adjust the position of 23 in the front and back direction, and
3b, 23b are brought into contact with the main insulating plates 20, 20'.

(Another embodiment) (1) FRP can also be used as the material for the main insulating plates 20, 20'.

(2) If the shape of the main insulating plates 20, 20' is formed so that the sliding surface side and the opposite surface side are symmetrical,
If the sliding surface is worn out, the arrow U on the main insulating plate 20
By reversing the side and the opposite side,
The surface opposite to the sliding surface 20c can be used as a sliding surface, which is economical.

(Effects of the Invention) As explained above, the present invention has the front and back sections of the contact wires 10 and 10' facing each other with a gap between them, and the main insulation that is divided into two parts in the front and back between the contact wires 10 and 10'. The plates 20, 20' are arranged so that the sliding contact surfaces 20c, 20'c of the main insulating plates 20, 20', which are in sliding contact with the current collector of the traveling vehicle, are the feeding surfaces 10c, 10'c of the contact wires 10, 10'. Since the air gap G is provided between the front and rear main insulating plates 20 and 20' so that they are substantially on the same plane, there are the following advantages.

(1) The main insulating plates 20, 20' themselves, the main insulating plates 20,
Since the insulation is done in two stages with the air gap G between the main insulating plates 20 and 20', even if the sliding surfaces 20c and 2 of the main insulating plates 20 and 20' are
Even if abrasion powder from the contact wire 10 or the current collector shoe adheres to 0'c and electricity leaks to the main insulating plates 20, 20', the electricity is completely cut off at the air gap G section and the insulation is maintained. This can prevent performance deterioration.

(2) Since electricity is cut off in two stages, even if wear powder adheres to the sliding surface 20c as described above or rain adheres to the joint X in Fig. Since the electrical load is extremely small, the incidence of sparks at the joint X and gap G is extremely low compared to the conventional example shown in FIG.

Therefore, the deterioration of the contact wire tip due to seizure is reduced, and the life of the contact wire is extended.

(3) Main insulating plates 20, 20' themselves, main insulating plates 20,
Since the insulation is done in two stages with the air gap G between 20' and Insulating plate 20, 2
The length of 0' can be made compact.

(4) Furthermore, since the main insulating plates 20, 20' are divided into two parts and made compact as described above, replacement work becomes easy and material costs are reduced.

(5) A pair of front and rear section core bars 23, 23, which are formed in a U-shape with the same cut shape as the pedestal 11, are arranged between each pedestal 11, 11 and the main insulating plates 20, 20'. Core shaft portions 23a, 23a are integrally provided on the core bars 23, 23, and are inserted and fixed into the front and rear frames 11, 11, respectively, and the front and rear ends 20a, 2 of the front and rear main insulating plates 20, 20' are
The sliding contact surfaces 20c, 20'c side portions of 0'a are sloped, and each sloped portion is connected to the sloped rear end 10a of the front contact wire 10 and the sloped front end 10'a of the rear contact wire 10'. The leading edge of the front end 20a of the front main insulating plate 20 is brought into contact with the rear edge 23b of the front section core bar 23, and the leading edge of the rear end 20'a of the rear main insulating plate 20' is in contact with the front edge 23b of the rear section core bar 23.

That is, by utilizing the section core bars 23, 23 fixed to the frame 11, the contact between the inclined surfaces between the section core bars 23, 23 and the contact wires 10, 10', and the contact between the section core bars 23, 23 and the contact wires 10, 10' are performed.
Since the main insulating plates 20, 20' are positioned by the contact between the leading edge of the contact wire 1
0, 10' during connection work, the main insulating plate 2
0 and 20' contact wires can be positioned smoothly, reliably and firmly in the length and width directions.
Power supply planes 10c, 10'c of contact wires 10, 10'
and the sliding surfaces 20c, 2 of the main insulating plates 20, 20'
0'c can be accurately matched, improving assembly accuracy.

Incidentally, as shown in FIG. 3, there is usually a gap ( Due to manufacturing and installation errors and diameter differences), simply tightening the bolts will cause the sliding surfaces 20c and 20'c to be connected to the power supply surface 10c and
10'c is difficult, and even if they are matched at the time of installation, they will shift due to use.

(6) Trolley wire gripping parts 25, 25 are integrally formed on the section core metals 23, 23 fixed to the respective tips of the front and rear frames 11, 11, and the gripping parts 25, 25 of each section core metal 23, 23 Since the front and rear contact wires 10 and 10' are respectively gripped by the front and rear contact wires, the ends of the contact wires can be firmly fixed, and the end portions of the contact wires may not lift up or shift from side to side during use. This problem can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a side view of a sectional insulating device to which the present invention is applied, Fig. 2 is a view taken in the direction of the arrows in Fig. 1, Fig. 3 is an exploded view of the main insulating plate, and Figs. 4, 5, and 6 are respectively 1st
Figure 7 is an enlarged cross-sectional view of the figure -, -, -, and Figure 7 is a cross-sectional view of the track device for arranging the contact wire.
FIG. 9 is a perspective view of each conventional example. 10, 10'...Trolley wire, 20, 20'...Main insulating plate, G...Air gap.

Claims (1)

[Claims] 1 In a contact wire segmental insulating device which is arranged on the contact wire mounting surface of a metal frame 11 having a U-shaped cross-section and is held by a pair of left and right fixed ears 12, the contact wire 10 in the front and rear sections, 1
1' are opposed to each other with a gap between them, and main insulating plates 20, 20', which are divided into two parts in the front and back, are arranged between the contact wire ends, and the main insulating plates 20, 20' are formed into a U-shape in cross section that is roughly the same as that of the pedestal 11. At the same time, the contact wire gripping part 2
A pair of front and rear section core bars 2 integrally having 5
3, 23 to each frame 11, 11' and the main insulating plate 20,
20', each section core bar 23, 2
3 are integrally provided with core shaft portions 23a, 23a, and each core shaft portion 23a, 23a is attached to the front and rear mounts 1, respectively.
1 and 11, and tilt the portion of the front end 20a of the front main insulating plate 20 on the sliding surface 20c side,
The inclined portion is connected to the inclined rear end portion 1 of the front trolley wire 10.
0a, the tip of the front end 20a abuts the rear edge 23b of the front section core bar 23, and the sliding surface 20' of the rear end 20'a of the rear main insulating plate 20'
The part on the c side is inclined, and the inclined part is brought into contact with the inclined front end 10'a of the rear contact wire 10', and the tip of the rear end 20'a is connected to the rear section core bar 2.
The sliding surface 20c of the main insulating plates 20, 20' contacts the front edge 23b of the main insulating plate 20, 20' and contacts the front edge 23b of
20'c is the power supply surface 10c of the contact wire 10, 10',
10'c, the front and rear main insulating plates 20,
A sectional insulating device for contact wire, characterized in that an air gap G is provided between 20' and 20'.