JPH11124803A - Rail elastic fastening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rail elastic clamping device capable of being fixed by fitting a position of a mounting hole in a base plate to a position of a mounting hole in a bridge girder used for the existing steel bridge solid bed track. SOLUTION: A tie plate 2 of a rail elastic clamping device 1 and an elastic member are so formed that shapes and sizes in the view of plane approximately coincide with those of them. A base plate 3 includes the central parts approximately coinciding with shapes and sizes of the tie plate and elastic member in the view of plane and projecting part 3c projected to the direction at right angles to the direction of rail construction from the central parts. Mounting holes 3d inserting a second clamping device into them are provided to both projection parts of the base plate, and the mounting holes having the centers in the central positions in the direction of rail construction in both projection parts are formed into slots long in the direction at right angles to the direction of rail construction. The base plate is led by rising guide sections 10a and 10b of an exclusive insulating plate insulated only against a bridge girder of a steel bridge with the end face at right angles to the direction of rail construction of the central part thereof and projected front end face of the projection parts and is stored in the planar insulating plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail elastic fastening device for elastically fastening a rail for railroad to a bridge girder of a steel bridge, and more particularly to a rail elastic fastening device which is directly connected to a bridge girder of a steel bridge. Pertaining to a steel bridge direct track.

[0002]

2. Description of the Related Art In recent years, it has been desired to lower the spring constant in the vertical direction of a rail fastening portion in order to reduce vibration and noise of houses, buildings, and the like constructed near rails. That is,
The spring constant in the vertical direction of the rail fastening part is 50ton / cm
As mentioned above, a demand of 5 to 30 ton / cm has been issued.

However, if the elastic constant of the elastic body (track pad) in the vertical direction is reduced, the spring constant in the lateral direction (the direction in which the lateral pressure or the descent force acts) also decreases. Requires measures against lateral pressure and runoff.

For this reason, as a conventional rail fastening device with a reduced spring constant in the vertical direction and a countermeasure against lateral pressure and steepness, it has been disclosed in, for example, Japanese Utility Model Laid-Open No. 5-33002, and FIGS. As shown, a tie plate 2 'to which a rail is attached, a base plate 3' to be attached to a slab, an elastic member 4 'interposed between the two plates 2' and 3 ', and a tie plate 2' The fitting protrusion 2c 'provided to project downward, the fitting recess 3b' provided on the base plate 3 'and fitting with the fitting protrusion 2c', and the fitting protrusion 2c 'are fitted. A synthetic resin intermediate member 8 ′ inserted between the joint concave portion 3 b ′ and
In the vertical direction, the compression deformation of the elastic member 4 'is used to promote the reduction of the spring constant, while in the horizontal direction, the fitting between the fitting convex portion 2c' and the fitting concave portion 3b 'and between the fitting convex portion 2c' and the fitting concave portion 3b ' There is known a rail elastic fastening device 1 ′ in which the pressure resistance is enhanced by the relation of the intermediate member 8 ′.

[0005]

By the way, even in the existing steel bridge direct connection track in which the rail is directly connected to the bridge girder of the steel bridge by the rail fastening device, not only in the vicinity thereof but also in taking measures against vibration and noise to passengers. Therefore, there is a demand that the rail elastic fastening device should be replaced.

However, since the above-mentioned conventional rail elastic fastening device is mainly of the type which is directly connected and fixed to the slab track by using a fastener, the position of the mounting hole formed in the base plate is changed to the steel bridge direct connection track. It did not match the position of the mounting hole of the rail fastening device provided on the bridge girder, and could not be used for the steel bridge direct connection track.

More specifically, as shown in FIGS. 7 and 8, a rail fastening device and a fastening mechanism used for an existing steel bridge direct-coupled track are arranged on a bridge girder 7 of a steel bridge in accordance with the laying direction of the rail R. The insulating plate 10 and the tie plate 2 ″ having a shape protruding in a tapered trapezoid shape from both sides of a rectangle that is long in the orthogonal direction and the tie plate 2 ″ (in this case, the tie plate is a fastening device)
The mounting holes provided in the tapered trapezoidal projections are aligned with the holes provided in the bridge girder 7, and the flanged insulating collar 13 is fitted into the communicating holes from above and below, and fastened with bolts 9a and nuts 9b. ing. Incidentally, reference numerals 10a and 10b denote rising guide portions, which will be described in detail in an embodiment described later.

On the other hand, as shown in FIGS. 5 and 6, the conventional rail elastic fastening device 1 'has a rectangular shape which is long in a direction perpendicular to the rail laying direction in plan view, and has a diagonal portion. In general, there are mounting holes 3d 'and 3d', and the positions of the mounting holes do not match those of the rail fastening device used for the existing steel bridge direct-coupled track, so that replacement is impossible at all. is there. Very rarely, rail elastic fastening devices with mounting holes on both sides at the center in the rail laying direction are also used, but there is no protrusion on both sides as in the case of the steel bridge direct connection track, and there is no space between the holes on both sides. Since the distance is greatly different (for example, the rail elastic fastening device is 280 mm, whereas the existing steel bridge direct track is around 400 mm). It was impossible.

[0009] The present invention has been made in view of such a point, and an object thereof is to easily replace a rail fastening device used for an existing steel bridge direct connection track,
In addition, an object of the present invention is to provide a rail elastic fastening device which can achieve a low spring constant and withstand lateral pressure.

[0010]

In order to achieve the above object, a solution taken by the present invention has a first engaging portion projecting downward and a rail is provided at the center of the upper surface via a first fastener. A tie plate to be attached, a base plate attached to a bridge girder of a steel bridge via a second fastener, a second engagement portion provided in a horizontal direction facing the first engagement portion, and the first engagement portion It is assumed that the rail elastic fastening device is formed by integrally forming an intermediate member interposed between the tie plate and the second engaging portion by an elastic member interposed between the tie plate and the base plate. Further, the tie plate and the elastic member are formed such that their shapes and dimensions in plan view substantially match. On the other hand, the base plate has a central portion having a shape and dimensions substantially identical to those of the tie plate and the elastic member in a plan view, and a tapered base protruding from the central part in a direction perpendicular to the rail laying direction. And a shape projection. The base plate has a pair of tapered trapezoidal projections provided with an insertion hole through which the second fastener is inserted, and the insertion hole has a center at a center position of the both tapered trapezoidal projections in the rail laying direction, and It is formed in a long hole that is long in the direction perpendicular to the rail laying direction. Then, the base plate is guided to a rising guide portion of a dedicated insulating plate that insulates only the bridge girder of the steel bridge with an end surface orthogonal to the rail laying direction at the center and a tip end surface of the tapered trapezoidal projection. Thus, the insulating plate is housed in the plane shape of the insulating plate.

According to the present invention, in the vertical direction, the elastic member has a low spring constant to reduce vibration and noise due to compressive deformation, and in the horizontal direction, the elastic member on the outer side of the rail acting on the rail acts on the rail. Since the pressure is received in a cushioning manner by the compression deformation and the intermediate member interposed between the two engaging portions, the small return of the rail (the inclination of the rail due to the lateral pressure) is kept small, and the vibration and noise are reduced. Further, if the positions of both the engagement portions of the tie plate and the base plate are changed to be closer to the inner side between the rail gauges with respect to the center position in the laying direction of the rail, it is possible to further reduce the small return of the rail. In addition, the base plate is guided and housed by the rising guide part of a special insulating plate that insulates only the bridge girder of the steel bridge. An insertion hole is provided at the center of the portion, and the hole is elongated in a direction perpendicular to the rail laying direction, so that the positional displacement between the holes between the insulating plate and the bridge girder is absorbed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rail elastic fastening device according to the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 and 2 show a rail elastic fastening device according to the present invention. The rail elastic fastening device 1 includes a tie plate 2, a base plate 3, and a fitting convex portion 2c of the tie plate 2 (described later). Fitting recess 3b of base plate 3
An intermediate member 8 (to be described later) inserted between the two plates (to be described later) is integrally connected to an elastic member 4 interposed between the plates 2 and 3.

The tie plate 2 is made of cast iron (FCD45
0) or a flat plate made of steel, and a flat portion 2a at the center of the upper surface on which the rail R is mounted, and rail laying directions protruding upward parallel to the longitudinal direction of the rail R on both sides of the flat portion 2a. A mounting projection 2b having recesses 2f at the center,
2b and a fitting projection 2 projecting downward in a frame shape at a position slightly closer to the inside of the rail R gauge (leftward in the figure) with respect to the lower surface center portion (the center position in the rail laying direction) of the lower surface of the flat portion 2a.
c (first engagement portion). In addition, a rib 2e projecting in parallel with the mounting projection 2b is formed at a center portion of the upper surface of the tie plate 2 outside the mounting projection 2b in the rail laying direction.

On the other hand, the base plate 3 is made of a steel plate (S
S400, etc.), and a central portion 3a whose size and shape in plan view substantially match those of the tie plate 2 and the elastic member 4, and a plan view projecting outward from the central portion 3a in a direction orthogonal to the rail laying direction. And has tapered trapezoidal projections 3c, 3c (tapered trapezoidal projections). The two projecting portions 3c have mounting holes 3d, 3d as insertion holes.
Is formed at the center position of the both protruding portions 3c in the rail laying direction as a long hole elongated in a direction orthogonal to the rail R laying direction. The base plate 3 has a tie plate 2
A frame-shaped fitting concave portion 3b (second engaging portion) that engages with the intermediate convex member 8 via the intermediate member 8 is provided outside the fitting convex portion 2c.

The elastic member 4 is made of natural rubber, synthetic rubber,
It is made of urethane rubber, urethane foam, or the like, is integrally vulcanized and interposed with the tie plate 2, the base plate 3 and the intermediate member 8, and also covers the side surface of the tie plate 2. By changing the rubber hardness of the elastic member 4 to JIS-A 40 ° to 70 ° or changing the Young's modulus of the rubber itself, the spring constant of the rail elastic fastening device 1 is set in the range of 5 ton / cm to 30 ton / cm. They are adjusted to obtain sound and vibration proof effects. The tie plate 2 and the elastic member 4 are formed so that their shapes and dimensions are substantially the same in plan view.

As shown in FIG. 1, a frame-shaped intermediate member 8 is externally fitted outside the fitting convex portion 2c of the tie plate 2, and the fitting concave portion of the base plate 3 is fitted outside the intermediate member 8. 3b is fitted outside. The intermediate member 8 is made of a polyamide reinforced by mixing a resin containing a reinforcing material having a high compression property and an electrical insulation property, for example, a glass fiber or an aramid fiber, so as to withstand electrical insulation and lateral rail load.
It is composed of a resin such as polyester, polyimide, and phenol.

Next, rail fastening of a steel bridge using the rail elastic fastening device 1 of the present invention will be described.

FIG. 3 and FIG. 4 are a cross-sectional view and a plan view orthogonal to the rail laying direction of the fastening portion using the rail elastic fastening device 1 of the present invention.

In FIGS. 3 and 4, S
Insulating plate 10 with a thickness of about 10 mm formed of a material such as MC
And the rail elastic fastening device 1 of the present invention is installed thereon. The shape of the insulating plate 10 is the same as that used for the existing steel bridge direct track, or a rectangle long in the direction perpendicular to the rail laying direction (for example, when the rail laying direction is 2 mm).
10 mm, a rectangular shape whose direction perpendicular to the rail is 340 mm).
It is a shape protruding in a tapered trapezoid shape with a height of 92.5 mm). At the center of the rail laying direction of the tapered trapezoidal projection, a long mounting hole (for example, a mounting hole having a width of 32 mm and a length of 52 mm) is provided in a direction perpendicular to the rail laying direction. The rising guides 10b, 10a are provided at both ends and the protruding portions of the phrase orthogonal to the rail laying direction.
(For example, a rising guide having a width of 7 mm and a height of 3 mm).

Base plate 3 of rail elastic fastening device 1
Are formed in substantially the same shape as the insulating plate 10, and are accommodated inside the rising guides 10b and 10a in plan view. That is, the base plate 3 has a size smaller than the insulating plate 10 by the width (7 mm) of the rising guides 10b and 10a in plan view.

Then, the mounting holes 3d provided in the projecting portions 3c of the base plate 3 and extending in the direction perpendicular to the rail laying direction are aligned with the mounting holes of the insulating plate 10 and the bridge girder 7 and are overlapped. A head bolt 9a is inserted from below the bridge girder 7 into holes such as the insulating collar 13 and the packing 16 which are inserted into the communication holes from both the upper and lower sides, and is screwed with a nut 9b via a plurality of types of washers. The rail elastic fastening device 1 is fastened to the bridge girder 7. In this case, the bolts and nuts 9a and 9b and the insulating collar 13 and the like make the second
A fastener B is configured.

On the other hand, the flat packing 2a at the center of the upper surface of the tie plate 2 has an adjustment packing 15 with a steel plate and
The rail R is placed via the. In this state, the heads of the head bolts 6a are inserted into the recesses 2f in the mounting projections 2b on both sides of the flat portion 2a of the tie plate 2, and the screw portions are inserted into the holes of the leaf spring 5 which is bent into a substantially R shape. The bent portion of the leaf spring 5 is positioned on the rib 2e on the upper surface of the tie plate 2 and its end is positioned on the base Ra of the rail R. By tightening the nut 6b on the bolt 6a, the rail R has elasticity. The rail R is elastically fastened (fixed) to the bridge girder 7 by this double fastening. In this case, the first fastener A is constituted by the bolts and nuts 6a and 6b, the leaf spring 5, and the like.

Therefore, in the above-described embodiment, the elastic member 4 has a low spring constant in the vertical direction to reduce vibration and noise due to compressive deformation, and the rail R in the horizontal direction.
Compression deformation of the elastic member 4 on the outer side and the fitting projection 2
Since the pressure is received in a compression-resistant and cushioning manner by the intermediate member 8 inserted between c and the fitting recess 3b, the small return of the rail R is kept small, and the vibration and noise can be reduced.

Moreover, the mounting holes 3d of the base plate 3
Is formed in the center of the protruding portion 3c as a long hole that is long in the direction orthogonal to the direction in which the rail R is laid. The difference can be absorbed, and the positioning of the mounting hole can be easily performed even when replacing with the rail fastening device of the existing steel bridge direct connection track.

Furthermore, since the existing insulating plate 10, insulating collar 13, bolts and nuts 9a and 9b, packing and washer can be used as they are, it is economical.

Further, the rail R is effectively electrically insulated by the existing steel bridge-directed rail fastening device by the elastic member 4 and the intermediate member 8, so that troubles due to poor insulation can be eliminated.

Further, the flat portion 2a of the tie plate 2
The fitting concave portion 3b of the base plate 3 is engaged with the outside of the fitting convex portion 2c located slightly inward of the rail R between the lower surface center portion via the intermediate member 8, so that the small return of the rail R is reduced. can do.

[0029]

As described above, according to the rail elastic fastening device of the present invention, the shape and dimensions of the base plate are adjusted to those of the fastening device (type plate) used for the existing steel bridge direct connection track, and the mounting hole is provided. Is formed in a long hole extending in a direction perpendicular to the rail laying direction, so that even if the pitch of the mounting holes of the bridge girder and the insulating plate is slightly different, it is possible to adjust while absorbing the displacement. Therefore, when replacing the rail fastening device of the existing steel bridge direct connection track with the rail elastic fastening device, the positioning of the mounting holes can be performed easily and in a short time, and furthermore, it has been used for the rail fastening of the existing steel bridge direct connection track. Since parts (insulating plates, insulating collars, bolts and nuts, etc.) can be used as they are, replacement with rail elastic fastening devices can be performed easily and economically.

Further, the positions of the engagement portions of the tie plate and the base plate can be changed toward the inner side between the rail gauges, so that the small return of the rail can be further reduced.

Further, since the rail is attached to the bridge girder via the elastic member and the intermediate member, effective electric insulation can be achieved by the elastic member and the intermediate member, and trouble due to poor insulation can be eliminated.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rail elastic fastening device according to an embodiment of the present invention.

FIG. 2 is a plan view of the rail elastic fastening device.

FIG. 3 is a sectional view of a rail fastening structure using the rail elastic fastening device.

FIG. 4 is a plan view of the rail fastening structure.

FIG. 5 is a cross-sectional view showing an example of a rail elastic fastening device used for a conventional slab directly connected track.

FIG. 6 is a plan view of the rail elastic fastening device according to FIG. 5;

FIG. 7 is a sectional view of a rail fastening device used for an existing steel bridge direct connection track.

FIG. 8 is a plan view of the rail fastening device according to FIG. 7;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rail elastic fastening device 2 tie plate 2 c fitting convex part (first engaging part) 3 base plate 3 b fitting concave part (second engaging part) 3 c projecting part (tapered trapezoidal projecting part) 3 d mounting hole (insertion hole) Reference Signs List 4 elastic member 7 bridge girder 8 intermediate member A first fastener B second fastener R rail

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hirokazu Matsukawa 3-2-1-5 Meiwadori, Hyogo-ku, Kobe-shi, Hyogo Inside BANDO CHEMICAL CO., LTD. No. 15 in Bando Kagaku Co., Ltd. (72) Inventor Yoichi Hino 2-19-12 Tomicho, Okayama-shi, Okayama Prefecture Honshu-Shikoku Liaison Bridge Public Corporation (72) Inventor Takaharu Nagato 2 Hikaricho, Kokubunji-shi, Tokyo 8-8 chome 38 Within the Railway Technical Research Institute (72) Inventor Noritsugu Abe 2-8-8 Hikaricho, Kokubunji-shi, Tokyo Within the Railway Technical Research Institute

Claims (1)

[Claims] 1. A tie plate having a first engagement portion projecting downward and a rail attached to the center of an upper surface via a first fastener, and a second tie plate horizontally facing the first engagement portion. A base plate provided with an engaging portion and attached to a bridge girder of the steel bridge via a second fastener, and an intermediate member interposed between the first engaging portion and the second engaging portion; In a rail elastic fastening device integrally formed by an elastic member interposed between a tie plate and a base plate, the tie plate and the elastic member are formed so that their shapes and dimensions in plan view substantially match. On the other hand, the base plate has a central portion whose shape and dimensions in plan view substantially match the tie plate and the elastic member, and a tapered trapezoidal shape in a direction perpendicular to the rail laying direction from the central portion. The base plate has a pair of tapered trapezoidal projections, and both of the tapered trapezoidal projections of the base plate are provided with insertion holes through which the second fasteners are inserted. The trapezoidal projection has a center at the center of the rail laying direction of the rail laying direction and is formed in a long hole that is long in a direction perpendicular to the rail laying direction. The tip end surface of the tapered trapezoidal protruding portion is guided by a rising guide portion of a dedicated insulating plate that insulates only against the bridge girder of the steel bridge, and is housed in the planar shape of the insulating plate. Rail elastic fastening device.