JPH10206090A - Self-shrinkable wedge fixing rail gun and suppressing method of interrail rebounding force - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rail gun to be excellent in assembly workability and maintainability. SOLUTION: Since, though an interrail rebounding force f1 intends to spread a pair of wedge members 8R and 8L to the outside, wedge surfaces 8a and 8b make contact with wedge surfaces 4a and 4b, a part of a force to spread a pair of the wedge members 8R and 8L to the outside is converted into a force f2 to press a pair of fixing steels 4T and 4B against each other for offsetting with each other. Since a need to use a number of bolts and effect fastening by a uniform force is eliminated, workability of assembly of a rail gun 100 is extremely improved. Further, since a need to effect re-fastening of a number of the bolts is also eliminated, maintainability is also remarkably improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-shrinkable wedge-fixed rail gun and a method of pressing down a repulsive force between rails, and more particularly, to a self-shrinkable wedge-fixed rail gun excellent in assembling workability and maintainability. And a method for holding down a repulsive force between rails capable of preventing a decrease in performance.

[0002]

2. Description of the Related Art FIG. 4 is a structural view showing an example of a conventional bolt-fixed rail gun. This bolt fixing rail gun 5
A current 00 flows through a series circuit of a pair of parallel rails 1R, 1L and a flying object H, and the flying object H is generated by an electromagnetic force acting between a magnetic field generated by a current flowing through the rails 1R, 1L and a current flowing through the flying object H. Is to accelerate. The rail 1R,
1L is GFRP (Grass Fiber Reinforced Prast)
ic) insulators 2T, 2B and insulator 31
It is surrounded by R, 31L, 32R, and 32L. Further, the insulators 2T and 2B and the insulator 31
R, 31L, 32R, 32L are fixed steel 41T, 41
B, 41R, 41L, 42T, 42B, 42R, 42
L, 43R and 43L. The fixed steels 42T, 43R, 43L are fixed by bolts 5T. The fixed steels 42B, 43R, 43L are fixed by bolts 5B.

FIG. 5 shows the above-mentioned bolt fixed rail gun 500.
It is explanatory drawing which shows the repulsion force between rails. Rail 1R, 1
Since a large current + − flows in L in the opposite direction, a strong rail-to-rail repulsion f1 acts on each other. This rail-to-rail repulsion f1
Is pressed down by bolts 5T and 5B.

[0004] Another related prior art is disclosed in Japanese Unexamined Patent Publication No.
-285496 and JP-A-8-61892.

[0005]

As shown in FIG. 5, in a conventional bolt-fixed rail gun 500, bolts 5T, 5
B suppresses the repulsion force f1 between the rails. However, in order to suppress the strong rail-to-rail repulsion force f1, it is necessary to arrange the bolts 5T and 5B at high density along the rails 1R and 1L, and many bolts 5T and 5B have to be used. . Also, if there is a variation in the bolt tightening force, the current flow in the rails 1R and 1L will not be uniform, causing erosion or restriking. Therefore, it is necessary to equalize the bolt tightening force. For this reason, there has been a problem that the workability of assembling the railgun is very poor. Also, the bolts 5T and 5B gradually expand due to the repulsive force f1 between the rails, causing arcing, and the performance is deteriorated. Therefore, it is necessary to retighten many bolts 5T and 5B, and the maintainability is poor. there were. Therefore, a first object of the present invention is to provide a rail gun which is excellent in workability of assembly and excellent in maintainability. A second object of the present invention is to provide a method for pressing down the repulsive force between rails, which can prevent a decrease in performance.

[0006]

According to a first aspect, the present invention provides a flying object (H) slidably contacting a pair of parallel rails (1R, 1L). A current is supplied to a series circuit of the rail (1R, 1L) and the flying object (H), and the rail (1R, 1R)
L) a rail gun (100) that accelerates the flying object (H) by an electromagnetic force acting between a magnetic field generated by a current flowing in the flying object (H) and a current flowing in the flying object (H).
R, 1L) are provided so as to sandwich the rail (1R, 1L) from the direction in which the rails (1R, 1L) are arranged, and have a pair of wedge members (8R) having wedge surfaces (8a, 8b) on the outside that correspond to oblique sides of a trapezoid opened outward. , 8L) and the rails (1R, 1L) from a direction orthogonal to the direction in which the rails (1R, 1L) are arranged.
And a wedge surface (4) provided so as to sandwich the wedge members (8R, 8L) and abutting against the wedge surfaces (8a, 8b).
a, 4b) inside a pair of fixed steel (4T, 4B)
And a fixing tool (9R, 9L) for integrally connecting the pair of fixing steels (4T, 4B). In the self-shrinkable wedge-fixed rail gun (100), the rail-to-rail repulsive force (f1) tries to spread the pair of wedge members (8R, 8L) outward, but the wedge surfaces (8a, 8b) become wedge surfaces (4a, 4a). , 4b)
, The pair of wedge members (8R, 8L)
Part of the force that tries to spread the steel outward is a pair of fixed steel (4
T, 4B) are converted into a force (f2) for pressing each other, and cancel each other. For this reason, the repulsion force (f1) between rails can be suppressed without using many bolts. That is, since it is not necessary to use many bolts and tighten with an equal force, the workability of assembling the rail gun (100) can be remarkably improved. Further, since it is not necessary to retighten many bolts, the maintainability is remarkably improved. In a second aspect, the present invention includes a plurality of parallel rails (1R, 1L), and a flying object (H) slidably in contact with the rails (1R, 1L), wherein the rail (1R , 1L) and the flying object (H) through a series circuit, and the rail (1
R, 1L) and the flying object (H)
A rail gun (100) for accelerating the flying object (H) by an electromagnetic force acting between the rails (1R, 1L) and a repulsive force (f1) acting between the rails (1R, 1L). Using the action, the rail (1)
R, 1L), a part of the repulsive force (f1) acting in a direction orthogonal to the repulsive force (f1)
(2) The method for suppressing the repulsive force between rails is characterized in that the method is converted to (2) and offset each other. In the above-described method of holding down the repulsive force between rails, a part of the repulsive force between rails (f1) is converted into a force (f2) facing each other in a direction orthogonal to the repulsive force between rails (f1) by the action of a wedge. Will offset. For this reason, the repulsion force (f1) between rails can be suppressed without using many bolts. That is, it is possible to prevent the performance from being deteriorated due to the extension of the bolt.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the embodiments of the present invention shown in the drawings. Note that the present invention is not limited by this.

First Embodiment FIG. 1 is a configuration diagram showing a self-shrinkable wedge-fixed rail gun according to a first embodiment of the present invention. The self-shrinkable wedge-fixed rail gun 100 includes a pair of parallel rails 1R, 1R.
A current flows through the series circuit of L and the flying object H, and the rails 1R, 1
The flying object H is accelerated by an electromagnetic force acting between the magnetic field generated by the current flowing through the L and the current flowing through the flying object H.
The rails 1R and 1L are surrounded by insulators 2T and 2B made of GFRP, a wedge member 8R having an insulator 3R, and a wedge member 8L having an insulator 3L. Also,
The insulators 2T and 2B and a pair of wedge members 8
R and 8L are surrounded by a pair of fixed steels 4T and 4B. Further, the pair of fixing steels 4T, 4B are integrally connected by fixing brackets 9R, 9L.

The wedge members 8R and 8L are connected to the rail 1
The rails 1R, 1L are provided so as to sandwich the rails 1R, 1L from the direction in which the R, 1L are arranged, and have wedge surfaces 8a, 8b on the outside corresponding to oblique sides of a trapezoid that opens outward. The fixed steels 4T, 4B are provided so as to sandwich the rails 1R, 1L and the wedge members 8R, 8L from a direction orthogonal to the direction in which the rails 1R, 1L are arranged.
The wedge surfaces 4a, 4b which contact the wedge surfaces 8a, 8b of the wedge members 8R, 8L are respectively provided inside, and the wedge surfaces 4c, 4 for dovetail joints.
d is provided on the outside. The fixing bracket 9R, 9
L has dovetail joint wedge surfaces 9c and 9d in contact with the dovetail joint wedge surfaces 4c and 4d of the fixed steels 4T and 4B, respectively.
The pair of fixed steels 4T and 4B are integrally fixed by a dovetail joint.

FIG. 2 is an explanatory view showing the repulsive force between rails of the self-shrinkable wedge-fixed rail gun 100. As shown in FIG. Rail 1
Since a large current + − in the opposite direction flows through R and 1L, a strong rail-to-rail repulsion f1 acts on each other. The rail-to-rail repulsion force f1 attempts to spread the pair of wedge members 8R, 8L outward, but since the wedge surfaces 8a, 8b are in contact with the wedge surfaces 4a, 4b, the pair of wedge members 8R, 8L are used. Is partially converted to a force f2 that presses the pair of fixed steels 4T and 4B against each other, and cancels each other. The remaining part of the force for expanding the pair of wedge members 8R and 8L outward is pressed down by the rigidity of the fixed steels 4T and 4B.

The self-shrinkable wedge-fixed rail gun 100 described above.
According to this, the repulsion force f1 between rails can be suppressed without using many bolts. That is, it is not necessary to use many bolts and tighten them with an equal force.
Therefore, the workability of assembling the self-shrinkable wedge-fixed rail gun 100 is remarkably improved. Further, since it is not necessary to retighten many bolts, the maintainability is remarkably improved. Further, the performance of the bolt is prevented from being deteriorated due to the extension of the bolt.

Second Embodiment FIG. 3 is a configuration diagram showing a self-shrinkable wedge-fixed rail gun according to a second embodiment of the present invention. The self-shrinkable wedge fixed rail gun 200 has the same configuration as the self-shrinkable wedge fixed rail gun 100 according to the first embodiment, except that the self-shrinkable wedge fixed rail gun 200 includes fixed steels 4T ′ and 4B ′ having outer surfaces having a circular cross section.

[0013]

According to the self-shrinkable wedge-fixed rail gun (100) and the method of pressing down the repulsive force between rails of the present invention, the repulsive force (f1) between rails can be pressed down without using many bolts. . For this reason, it is not necessary to use many bolts and tighten with even force,
Workability of assembling the rail gun (100) can be remarkably improved. Further, since it is not necessary to retighten many bolts, maintainability can be remarkably improved. Further, it is possible to prevent the performance from lowering due to the extension of the bolt.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a self-contracting wedge-fixed rail gun (100) according to a first embodiment of the present invention.

FIG. 2 is a self-contracting wedge-fixed railgun (100) of FIG.
It is explanatory drawing of the repulsion force between rails in FIG.

FIG. 3 is a configuration diagram illustrating a self-shrinkable wedge-fixed rail gun (200) according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram showing a conventional bolt fixing rail gun (500).

5 is an explanatory diagram of a repulsion force between rails in the bolt fixed rail gun (500) of FIG.

[Explanation of symbols]

100, 200 Self-shrinkable wedge fixed rail gun 1R, 1L Rail 2T, 2B Insulator 3R, 3L Insulator 4T, 4B Fixed steel 4a, 4b Wedge surface 8R, 8L Wedge member 8a, 8b Wedge surface 9R, 9L Fixed bracket f1 Between rails Repulsion force f2 Force of pressing a pair of fixed steels against each other H Projectile

Claims (2)

[Claims] 1. A pair of parallel rails (1R, 1L);
A flying object (H) slidably in contact with the rails (1R, 1L); a current flows through a series circuit of the rails (1R, 1L) and the flying object (H);
R, 1L) and the flying object (H)
A rail gun (100) that accelerates the flying object (H) by an electromagnetic force acting between the rails (1R, 1L) and a current flowing through the rails (1R, 1L). A pair of wedge members (8R, 8L) having wedge surfaces (8a, 8b) on the outside that correspond to oblique sides of a trapezoid opened outward, and the rails (1R, 1L) from a direction perpendicular to the direction in which the rails are arranged. A pair of fixed steel (4T) provided so as to sandwich the rail (1R, 1L) and the wedge member (8R, 8L) and having wedge surfaces (4a, 4b) abutting on the wedge surfaces (8a, 8b) inside. , 4B) and a pair of fixed steels (4T, 4B)
A self-contracting wedge-fixed rail gun, characterized by comprising fixing tools (9R, 9L) for integrally connecting the wedges. 2. A plurality of parallel rails (1R, 1L);
A flying object (H) slidably in contact with the rails (1R, 1L); a current flows through a series circuit of the rails (1R, 1L) and the flying object (H);
R, 1L) and the flying object (H)
A repelling force (f1) acting between the rails (1R, 1L) in a rail gun (100) for accelerating the flying object (H) by an electromagnetic force acting between the wedge and a wedge. Utilizing the action, a part of the repulsive force (f1) acting between the rails (1R, 1L) is converted into a force (f2) facing each other in a direction orthogonal to the repulsive force (f1), thereby canceling each other. A method for holding down the repulsive force between rails, characterized in that: