JP2984837B1 - Impedance bond short circuit prevention cover - Google Patents

Abstract

The present invention provides an impedance bond short-circuit prevention cover which is attached to a primary terminal of an impedance bond and does not easily come off even when subjected to vibration or impact. SOLUTION: Impedance bond short-circuit prevention cover 1
Has a terminal cover 2 and a conductor cover 3 integrally.
The terminal cover 2 and the conductor cover 3 are made of nitrile rubber having oil resistance and weather resistance, have a ceiling 4 and both side walls 5, and have a lower open sheath. When the whole of the impedance bond short-circuit prevention cover 1 is pressed onto the primary terminal 7,
Under this force, hooks 9a, 9b on both side walls of terminal cover 2 are received.
Is spread out, and a pair of terminal bolts 13 of the primary terminal 7 is
The terminal board 8 and the impedance-bonded cable 1 superposed thereon are received in the terminal bolt housing 11.
0 are received between the side walls of the terminal cover 2 and the hooks 9a. 9b is restored and locked to the bottom of the terminal plate 8, and the impedance bond conductor 10 is received in the conductor cover 3, and the impedance bond short circuit prevention cover 1 is fixed to the primary terminal 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impedance bond terminal, and more particularly to an impedance bond short-circuit prevention cover which covers an exposed portion of a primary terminal.

[0002]

2. Description of the Related Art An impedance bond is provided at a boundary point of a double track type track circuit, and is used for an electrical connection method in which a signal current is not passed to an adjacent track circuit, but a return current of a train is passed. The basic configuration has a primary coil and a secondary coil wound on an iron core,
The windings are separated by a neutral terminal and arranged so that magnetic fluxes generated by retrace currents flowing through the windings cancel each other.

In FIG. 4, a primary coil 17, a secondary coil 18 and an iron core 19 are accommodated in a case 6, and the inside of the case 6 is filled with insulating oil and sealed for cooling and insulation. Primary terminal 7 and neutral terminal 20
Is connected to the copper plate of the primary coil 17, and the conductor of the secondary coil 18 is connected to the secondary terminal 21. The primary terminals 7 are provided so as to protrude to the left and right of the case 6, the respective primary terminals 7 and the rails are connected via an impedance bond conductor 10, and the connection between the primary terminal 7 and the terminal 12 of the impedance conductor 10 is This is performed by tightening the terminal bolt 13 and the nut 15.

However, since the primary terminal 7 is exposed outside the case 6 and the connection between the primary terminal 7 and the impedance bond conductor 10 is performed outside the case 6, for example, during the maintenance work, Rails, wiring cables, and other hardware touch the connection between the primary terminal 7 and the impedance bond conductor 10. This may cause a short circuit accident.

In order to prevent such an accident, an impedance bond short-circuit prevention cover which covers the exposed portion of the primary terminal has been used in some cases. The conventional impedance bond short-circuit prevention cover uses a hard insulating material such as plastics as the material of the cover, and uses a screw-type mounting bracket for this cover for the vinyl coating of the impedance bond conductor between the primary terminal and the rail. The upper part of the terminal bolt was hinged so that the lid provided on the cover could be opened and closed.

[0006]

The above-described impedance-bond short-circuit prevention cover was made 20 to 30 years ago and actually installed. The screws are loosened or broken due to vibration due to the stop type mounting, the cover mounting position is shifted or dropped, and the lid can not be opened and closed due to aging due to the use of metal hinges. There was a problem.

[0007] In fact, from 1965 to the 1950s,
Although a short-circuit prevention cover having the above-described structure is installed on a large number of impedance bonds, it is a fact that there is almost no one that has fallen off from the impedance bonds and remains to date.

However, recently, during the construction of the overhead wire, both primary terminals of the impedance bond are short-circuited, and this has caused an accident of stopping the train. The need has come to the fore.

An object of the present invention is to provide an impedance bond short-circuit prevention cover which can be attached and detached with one touch, and does not easily come off even when subjected to vibration or impact.

[0010]

In order to solve the above-mentioned object, an impedance-bond short-circuit prevention cover according to the present invention is an impedance-bond short-circuit prevention cover having a terminal cover and a conductor cover integrally. The covering portion and the conductor covering portion are a sheath made of an elastic material having oil resistance and weather resistance, the sheath has a ceiling and both side walls, the lower surface and both ends are open, and the terminal covering portion is an impedance bond. A portion covering the terminal plate of the primary terminal projecting from the case, having a hook on at least a part of the lower edge of both side walls, the hook being engaged with the terminal plate of the primary terminal, and a wire covering portion. Is a portion that covers the impedance bond conductor connected to the terminal plate of the primary terminal, which is opened in the terminal cover and attached to one side wall thereof.

A terminal bolt storage portion is formed by raising a part of the ceiling of the terminal cover portion, and is a terminal for fixing the terminal plate of the primary terminal and the terminal of the impedance bond conductor. The bolt is received inside to hold the terminal cover in a fixed position.

Further, the terminal bolt storage portion has a projecting edge extending downward from a part of the ceiling of the terminal cover portion, and the projecting edge is supported by a nut for tightening the terminal bolt to stabilize the mounting position of the terminal cover portion. It is to let.

Further, one of the hooks provided on both side walls of the terminal cover is provided so as to face each other in the opening of the conductor cover, and is opened outward by bending the ceiling of the conductor cover upward. Things.

The both side walls of the terminal cover are connected by ribs attached to the ceiling. The ribs maintain the shape of the terminal cover and give elastic strength to both hooks.

The conductor covering portion is formed at a central portion in the longitudinal direction of the terminal covering portion, and the terminal covering portions have left and right sheath portions which are selectively used for covers of the left and right primary terminals of the impedance bond.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, in an impedance bond short-circuit prevention cover 1 according to the present invention, a terminal cover 2 is provided.
And the conductor covering portion 3.

The terminal cover 2 and the conductor cover 3 are sheaths made of an elastic material having excellent oil resistance and weather resistance, such as nitrile rubber, and having rigidity. In the present invention,
The sheath is a gate-shaped structure having a ceiling 4 and both side walls 5 and an open lower surface and both ends.

The terminal cover 2 is a portion for covering the terminal plate 8 of the primary terminal 7 which protrudes from the impedance bond case 6, and as shown in FIG. 9b is opposed to a part of the lower edge of both side walls. Note that both side walls 5a, 5a of the terminal cover 2 are provided.
b, the side wall 5 on the side where the conductor covering portion 3 is not formed
a is formed to be inclined inward as shown in FIG.
A restoring force acts on elastic deformation of the side walls 5a, 5b in the expanding direction. one

The primary terminal 7 has the terminal 12 of the impedance bond cable 10 superimposed on the upper surface of the terminal plate 8 attached to the lead wire of the primary coil drawn out of the case 6 of the impedance bond. A bolt 13 is inserted, and a nut 15 is screwed into a terminal bolt 13 protruding above the terminal 12 of the impedance bond cable lead wire 10 and tightened.

The conductor covering portion 3 is a portion that covers the impedance bond conducting wire 10 connected to the terminal plate 8 of the primary terminal 7, is formed at a central portion in the longitudinal direction of the terminal covering portion 2, and is formed inside the terminal covering portion 2. And is attached to one of the side walls 5a. In FIG. 2, the hook 9b of the side wall 5b is
It is provided so as to protrude from the side wall 5b facing the inside of the opening of the conductor covering portion 3. Further, terminal cover 2
A terminal bolt storage part 11 is provided in a part of the ceiling of.

The terminal bolt storage portion 11 is formed by raising a part of the ceiling of the terminal cover portion 2 and fixes the terminal plate 8 of the primary terminal 7 and the terminal 12 of the impedance bond conductor 10 as shown in FIG. A small hole 22 for positioning observation and track circuit test measurement is opened on the upper surface thereof. The terminal bolt housing portion 11 further has a projecting edge 14 extending downward from the lower surface of the ceiling of the terminal cover portion 2 over a certain range.

The overhanging edge 14 has two terminal bolts 13 attached thereto at regular intervals,
This is for receiving a nut 15 for tightening each terminal bolt 13.
It is formed in a contour that follows the arrangement of the terminal bolts 13 and the shape of the nut 15.

Further, the side walls of the terminal cover are connected by ribs 16 attached to the ceiling. This rib 16
Are formed on both sides of the overhanging edge 14 of the terminal bolt storage portion 11 to maintain the shape of the terminal cover portion 2 and give the hook 9 elastic strength.

When the impedance-bond short-circuit prevention cover 1 of the present invention is attached to the primary terminal 7 of the impedance bond, the terminal bolt storage portion 1 is used by using the small observation hole 22.
1 and the terminal bolts 13 of the primary terminal 7, the conductor cover 3 is oriented in the direction in which the impedance bond cable conductor 10 extends, and the entire impedance bond short circuit prevention cover 1 is connected to the primary terminal. 7. Press on top.

Under this force, the hooks 9a and 9b on both side walls of the terminal cover 2 are pushed open against the elasticity of the side wall, and the pair of terminal bolts 13 is received in the terminal bolt storage portion 11. The terminal plate 8 and the terminal 12 of the impedance-bonded cable lead 10 superposed thereon are received between both side walls of the terminal cover 2, and the hooks 9a, 9b
Is restored and locked to the bottom of the terminal plate 8, and the impedance bond conductor 10 is received in the conductor cover 3. The side wall 5b of the terminal cover 2 is pushed and spread against the elasticity, and is tightened to the terminal plate 8 by its restoring force.

When the impedance bond short-circuit prevention cover 1 of the present invention is attached to the primary terminal 7, the terminal bolt housing 1 formed by rising from the ceiling 4 of the terminal cover 2.
1, a terminal cover 2 is held at a fixed position by being supported by a rising height portion of a terminal bolt 13 received therein, and a projecting edge 14 of a terminal bolt storage portion 11 is provided with a nut for tightening the terminal bolt 13. Since the terminal cover 2 is supported by a part of the outer periphery of the terminal 15, the terminal cover 2 is stably mounted at a fixed position.

After the mounting, the material has the strength to withstand the vibration or impact applied to the mounting portion of the impedance bond short-circuit prevention cover 1, and the hooks 9a and 9b have the material of the impedance bond short-circuit prevention cover. Since the elastic force acts on the terminal plate 8 so that it is securely locked, it cannot be easily removed.

Next, when removing the impedance bond short-circuit prevention cover 1 from the primary terminal 7, the hooks 9a and 9b on both side walls of the terminal cover 2 are spread, and the entire terminal cover 2 is easily lifted upward. Can be removed. In particular, the hook 9 on the side wall where the wire covering portion 3 is opened by bending the ceiling of the wire covering portion 3 upward.
Can be easily opened outward to remove the impedance bond short-circuit prevention cover 1.

In the above embodiment, the primary terminal 7 extending from the impedance-bonded case 6 to the right side in the drawing.
An example in which the impedance bond short-circuit prevention cover 1 is attached to the terminal cover 2 is shown. However, since the conductor cover 3 is formed at the central portion of the terminal cover 2 in the longitudinal direction, the other sheath portion is used for Can be attached to the primary terminal. That is,
The impedance bond short-circuit prevention cover of the present invention can be properly used as a cover for any of the left and right primary terminals of the impedance bond.

[0030]

As described above, when the impedance bond short-circuit prevention cover of the present invention is used, the impedance bond can be attached to and detached from the primary terminal with a single touch. After the attachment, the terminal board and the impedance bond cable conductor are connected. Nitrile type, which is fixed to the primary terminal by being supported by terminal bolts and nuts that tighten and fix the terminal, does not fall off easily even when subjected to vibration or shock, and has excellent oil and weather resistance and rigidity By selecting and using rubber, it is possible to withstand long-term use.
Further, according to the present invention, there is an effect that a track circuit test and measurement can be performed while being attached to the primary terminal.

[Brief description of the drawings]

FIG. 1 is a view showing a procedure for attaching an impedance bond short-circuit prevention cover of the present invention to a primary terminal of an impedance bond.

FIG. 2A is a partial cross-sectional plan view of an impedance bond short-circuit prevention cover of the present invention, and FIG.
It is a B sectional view.

FIG. 3 is a partial sectional front view of the impedance bond short-circuit prevention cover of the present invention.

FIG. 4 is a partial cross-sectional plan view of an impedance bond.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Impedance bond short-circuit prevention cover 2 Terminal cover 3 Conductor cover 4 Ceiling 5 Side wall 6 Primary terminal 8 Terminal board 9 Hook 10 Impedance bond conductor 11 Terminal bolt storage part 12 Terminal 13 Terminal bolt 14 Overhanging edge 15 Nut 16 Rib 17 Primary coil 18 Secondary coil 19 Iron core 20 Neutral terminal 21 Secondary terminal 22 Small hole

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shinichi Imae 25-1414, Irumagawa, Sayama City, Saitama Prefecture (56) References JP-A-9-226579 (JP, A) Jikken Sho 10-11655 (JP, Y1) (58) Field surveyed (Int.Cl. ⁶ , DB name) B61L 1/18

Claims (6)

(57) [Claims] 1. An impedance-bond short-circuit prevention cover integrally including a terminal cover and a conductor cover, wherein the terminal cover and the conductor cover are made of an elastic material having oil resistance and weather resistance. The sheath has a ceiling and both side walls, the lower surface and both ends are open, and the terminal cover portion is a portion that covers the terminal plate of the primary terminal protruding from the case of the impedance bond. At least a portion has a hook, the hook is to be locked to a terminal plate of the primary terminal, and the conductor covering portion is a portion covering an impedance bond conducting wire connected to the terminal plate of the primary terminal, An impedance bond short-circuit prevention cover, which is opened in a part and is attached to one of the side walls. 2. A terminal having a terminal bolt storage portion, the terminal bolt storage portion being formed by raising a part of a ceiling of a terminal cover portion, and fixing a terminal plate of a primary terminal and a terminal of an impedance bond conductor. Accept the bolt inside,
The impedance bond short-circuit prevention cover according to claim 1, wherein the terminal cover is held at a fixed position. 3. The terminal bolt storage portion has a projecting edge extending downward from a part of the ceiling of the terminal cover portion, and the projecting edge is supported by a nut for tightening the terminal bolt to stabilize the mounting position of the terminal cover portion. The impedance bond short-circuit prevention cover according to claim 2, wherein the cover is used to prevent short-circuiting. 4. One of the hooks provided on both side walls of the terminal covering portion is provided so as to face each other in the opening of the conductor covering portion, and is opened outward by bending the ceiling of the conductor covering portion upward. The impedance bond short-circuit prevention cover according to claim 1, wherein 5. The terminal cover is connected between both side walls by ribs attached to the ceiling, and the ribs maintain the shape of the terminal cover and give elastic strength to both hooks. The impedance bond short circuit prevention cover according to claim 1. 6. The conductor covering portion is formed at a central portion in the longitudinal direction of the terminal covering portion, and the terminal covering portions are used separately for covering left and right primary terminals of the impedance bond. The impedance bond short-circuit prevention cover according to claim 1, wherein: