JP2514140Y2 - Shear type anti-vibration slab track - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vibration-proof slab track for supporting a rail on a track slab via a tie plate. Particularly, the track structure has been improved to obtain optimum low spring characteristics for vehicle running. It is designed to help reduce noise and vibration.

[0002]

2. Description of the Related Art Recently, there has been an increasing demand for reduction of railway noise and vibration, and various countermeasures have been studied. On the ballast track, a ballast mat or the like is laid between the viaduct and the ballast. In addition, the underside of the sleepers laid under the rails is covered with an elastic material to reduce noise and the like.

On the other hand, in the slab track, as shown in FIG. 4, a track slab 1 is provided on a roadbed concrete 15 via a mortar 16, and a rubber mat 17 called a track slab mat is provided under the track slab 1. Methods such as bonding as an elastic material or inserting a soft track pad between the tie plate 7 and the rail R of the rail fastening device are widely adopted. These are all anti-vibration measures that utilize the compressive deformation of elastic materials. Further, a rail fastening device having a low spring coefficient utilizing shear deformation of an elastic material has also been proposed. The example shown in FIG. 5 is a rail fastening device arranged on a track slab, which is provided with a vibration damping device 18 having a pair of vibration damping rubbers on both sides of a rail R of a track slab bearing, and a type between them. Pass rate 7 and bolt down,
The rail R is fixed to the upper center of the tie plate 7.

[0004]

When a rubber mat is laid under the track slab among the above-mentioned prior art, the vertical characteristics of the mat are hard and the vibration damping effect is small, and a groove or the like is formed on the lower surface of the mat. Even if it is attached to reduce the rigidity, it is not possible to obtain a sufficient effect for reducing noise and vibration. In addition, the low spring track pad has a drawback that the rail is slightly bent. Especially for reduction of vibration, 5 per fastening
It is considered necessary to reduce the spring to MN / m or less,
It is difficult to obtain this with the combination of the slab mat and the track pad. Further, as shown in FIG. 5, since the type in which the rail is fixed to the tie plate supported by the anti-vibration rubber has a structure utilizing shear deformation of the rubber,
Low spring is easy. However, since this device itself is large and heavy, and it is attached to the track slab during construction, there are many inconveniences from the viewpoint of construction or maintenance.

In view of this, the present invention solves the above-mentioned problems in the vibration slab track all at once, and makes it possible to keep the rail in a low state, and to prevent the vehicle from traveling when lateral load is applied to the rail. The purpose of the present invention is to improve safety and to make the rail fastening structure integrated with the track slab to manufacture it, thereby facilitating construction and maintenance and increasing the vibration reduction effect.

[0006]

The present invention has achieved the above object in a vibration-proof slab track in which rails are supported on the track slab via a tie plate. Therefore, the cylinders are embedded on both sides of the rail to be supported in the track slab so that its axis is perpendicular to the track slab surface.
Then , the supporting column is attached to the cylindrical body via the cylindrical elastic body, and the elastic body is configured to be sheared and deformable in the axial direction thereof, so that the tie plate can be held on the upper side in the axial direction of the supporting column. In order to ensure the fixation of the tubular body embedded in the track slab, a retaining portion for preventing the tubular body from being pulled out is provided on the outer periphery on the lower surface side in the axial direction. In addition, in order to increase the safety of the supporting rail against inclination, the rigidity of the cylindrical elastic body interposed between the support body and the cylinder in the lateral direction with respect to the rail in the axial direction of the cylinder is Set more than double.

[0007]

[Function] In the above-mentioned rail support vibration-proof slab track, since the pillar body, the elastic body, and the cylinder body supporting the rail are embedded in the track slab, the work of mounting the elastic body or the like at the rail facility site is not required. It is unnecessary and site workability is improved.
Further, since the elastic body and the column body for vibration isolation are arranged in the vertical direction, the vibration when passing through the vehicle escapes in the shearing direction of the cylindrical elastic body, and the spring constant in the vertical direction is 1 to 10 MN /
A low spring constant of m can be easily realized, and a good vibration damping effect can be obtained. When a lateral load acts on the rail, a lateral load is applied to the rail on the tubular elastic body, and the rigidity in the lateral direction is twice as hard as the rigidity in the vertical direction. The tension and compression that occur is small,
The rail is hard to tilt.

[0008]

1 and 2, an embodiment of the present invention will be described.
FIG. 1 shows an embodiment of the present invention, in which a rail support R of a track slab 1 is embedded with a vibration isolating support portion having a column body 5 provided in a cylindrical body 2 with an elastic body 4 interposed therebetween. It shows a configuration in which the rail R is fixed via a tie plate 7. The track slab 1 is, for example, made of concrete having a length of 5 m, a width of 2 m, and a thickness of 19 cm, and tubular bodies 2 having an oval cross section are embedded at appropriate intervals in the longitudinal direction of the rail R and on both sides of the rail R sandwiched therebetween. It The cylindrical body 2 is made of metal, and is arranged so that the axis of the cylindrical body 2 is perpendicular to the upper surface of the concrete board 1, and the upper end surface of the cylindrical body 2 is arranged so as to appear on the upper surface of the concrete board 1. It Further, an annular convex or concave engaging portion 3 is provided on the outer periphery of the lower portion of the cylindrical body 2 so as to prevent the annular slab 1 from slipping out. In addition, the cylinder 2
Is formed in a taper shape with an upward spread, but it may be formed in a taper shape with a reverse spread or in a non-tapered state.

A tubular elastic body 4 is inserted into the inner circumference of the tubular body 2 and is vulcanized and bonded to the inner circumferential surface of the tubular body 2, and a support column 5 is inserted into the elastic body 4 and the outer circumferential surface thereof. Are vulcanized and bonded to the elastic body 4. Portions of the elastic body 4 and the support body 5 to be inserted into the cylindrical body 2 are formed in a similar cross-sectional shape to the cylindrical body and in a similar tapered shape. The spring constant of the elastic body 4 in the vertical direction is made to be a low spring constant of 1 to 10 MN / m, and the rigidity in the lateral direction with respect to the rail R is made to be twice as hard as the rigidity in the vertical direction of the tubular body, Vibration in the vertical direction is sufficiently dampened, deformation in the lateral direction is less likely to occur, and tilting is less likely to occur even when a lateral load is applied to the rail R. The top of the elastic body 4 is covered with the cover 10.

A space 6 is formed in the lower part of the elastic body 4 in the axial direction, and the lower part of the elastic body 4 in the axial direction is separated from the track slab 1. The body 4 is vertically displaceable, that is, it can be sheared and deformed to reduce vibration and noise. Vacant space 6
In order to form the track slab 1, sponge, styrofoam, or a mold is placed in the space 6 for the convenience of manufacturing the track slab 1, and concrete molding is performed. It should be noted that the cushioning member composed of the tubular body 2, the elastic body 4, and the support body 5 is formed by directly embedding it in the concrete of the track slab 1 as described above.
The cushioning member 11 may be detachably attached to the track slab 1 as shown in FIG. In this case, a tubular fixing member 12 corresponding to the tubular body 2 is embedded in the concrete of the track slab 1 to integrally configure the two, and the fixing member 12 is prevented from coming off by the lower locking portion 14. There is. Then, the upper edge flange of the tubular body 2 of the cushioning member is fixed to the upper edge of the fixing member 12 with the bolt 13.

In the track slab 1 described above, a tie plate 7 is fixed between the upper ends of a pair of support pillars 5 sandwiching the rail R with bolts 8, and the rail R is provided with a spring-like stopper 9 on the tie plate 7. It is designed to be fixed with bolts and nuts. Since the pillar 5 projects from the upper surface of the track slab 1, the tie plate 7 is supported only by the pillar 5.
It is supported by the track slab 1 via the elastic body 4.

[0012]

EFFECTS OF THE INVENTION In the vibration-proof slab track for rail support according to the present invention, since the support pillar supporting the tie plate is embedded in the track slab via the cylindrical elastic body, the track spring coefficient decreases. Easy and highly effective in reducing noise and vibration. Further, since the vibration-isolating support portion such as an elastic body is integrally incorporated in the track slab for manufacturing, construction and maintenance are facilitated. In addition, the tie plate can be of the type generally used in the past, which is economical, and repairs can be performed without lifting the rails too high. Further, since the rail can be held in a low state and the rigidity of the elastic body in the lateral direction is increased, it is difficult to tilt even if a lateral load is applied to the rail, and the traveling safety of the vehicle can be maintained.

[Brief description of drawings]

FIG. 1 is a sectional view of an anti-vibration slab track for rail support according to the present invention.

FIG. 2 is a partial plan view of an anti-vibration slab track.

FIG. 3 is a cross-sectional view showing a fixed state of a cylindrical body having an elastic body in a track slab.

FIG. 4 is a partial perspective view of a conventional vibration-proof slab track.

FIG. 5 is a sectional view of a conventional shear type rail fastening device.

[Explanation of symbols]

 1 Orbital slab 2 Cylindrical body 3 Locking part 4 Elastic body 5 Strut body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsutoshi Ando 2-8, Hikarimachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Hiroshi Kumazaki 38-8, Hikarimachi, Kokubunji, Tokyo Inside the Railway Technical Research Institute (72) Inventor Jun Sugamura, 3-105, Sugaya, Ageo City, Saitama Prefecture Fukuku (72) Inventor, Kazuo Arai 3-105, Sugaya, Ageo City, Saitama Prefecture 72) Inventor, Kazuyoshi Murakami, 3-105, Sugaya, Ageo City, Saitama Prefecture, inside Fukoku Co., Ltd.

Claims (3)

(57) [Scope of utility model registration request] 1. A vibration isolating slab track for supporting the rail via a tie in orbit slab, on both sides the position of the rail to be supported in the track slab, so that its axis of the cylindrical body is perpendicular to the track slab surface Embedded in the cylindrical body, the column body is mounted via a cylindrical elastic body, and the elastic body is configured to be shearable in the axial direction thereof,
A shear-type vibration-isolated slab track characterized by being able to hold a tie plate on the upper part of the pillar body in the axial direction. 2. The shear type vibration-proof slab track according to claim 1, wherein a retaining portion is provided on the outer periphery of the lower surface side of the cylindrical body in the axial direction. 3. The tubular elastic body interposed between the support body and the tubular body has rigidity in the lateral direction with respect to the longitudinal direction of the rail,
The shear type vibration-proof slab track according to claim 1 or 2, wherein the rigidity is set to be twice or more the rigidity of the cylindrical body in the axial direction.