JPH07305302A - Vibration preventing device for track - Google Patents

Abstract

PURPOSE:To facilitate maintenance and exchange of vibrationproof rubber, provide sufficient durability of a vibration preventing device, and strongly fix the vibrationproof rubber. CONSTITUTION:A hollow insert metal fitting 3 penetrating a floating slab 2 vertically is attached to the floating slab 2 at molding it, and the insert metal fitting 3 is provided with insert nuts 5 buried in the floating slab 2. A hollow pedestal 6 is inserted into the insert metal fitting 3, bolts 7 are screwed in the insert nuts 5 from the inside of the pedestal 6, and hence the pedestal 6 is fixed to the insert metal fitting 3. An upper bracket 10 to be placed on vibrationproof rubber 9 on a lower bracket 8 fixed to a rigid roadbed 1 is attached to the underside of the pedestal 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports rails on a flat or frame-shaped precast concrete floating slab via a rail connecting device in a railway track, and elastically mounts the floating slab on a rigid roadbed. The present invention relates to a vibration isolator for a track to be supported.

[0002]

2. Description of the Related Art A conventional track vibration isolator is known in which a floating slab 101, on which a rail 100 is supported, is supported on a rigid roadbed 1 by a vibration isolating rubber 102, as shown in FIG. .

[0003]

The anti-vibration rubber 102 between the rigid roadbed 1 and the floating slab 101 needs to be replaced or maintained when it is damaged or its performance is deteriorated. Replacing and maintaining the conventional anti-vibration rubber 102 has been extremely difficult because the gap between the rigid roadbed 1 and the floating slab 101 is small. When exchanging the anti-vibration rubber 102, the floating slab 101 had to be jacked up to work in a narrow space, which was extremely troublesome. It is also known that the anti-vibration rubber can be maintained and replaced from the top of the floating slab, but it does not have sufficient durability against the train load or the anti-vibration rubber installation is unstable. There was.

Therefore, an object of the present invention is to provide an anti-vibration device for a track, which facilitates maintenance and replacement of the anti-vibration rubber, has sufficient durability against the load of a train, and is also fixed firmly to the anti-vibration rubber. And

[0005]

In order to achieve the above object, the present invention is to attach a hollow insert metal fitting vertically penetrating the floating slab during molding of the floating slab, and the insert metal fitting is embedded in the floating slab. Provide a nut, insert a hollow pedestal in the insert metal fitting, screw the bolt from the inside of the pedestal into the insert nut to fix the pedestal to the insert metal fitting, and mount it on the anti-vibration rubber on the lower bracket fixed to the rigid roadbed under the pedestal. The upper bracket to be placed is attached.

[0006]

According to the present invention, since the antivibration rubber can be maintained and replaced from the upper portion of the floating slab, the work is facilitated, and the hollow insert metal fitting having the insert nut on the outer periphery is attached when the floating slab is formed. Furthermore, since the anti-vibration rubber is interposed between the upper bracket and the lower bracket, the anti-vibration rubber can be fixed firmly.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, a hollow insert metal fitting 3 which vertically penetrates the floating slab 2 when the floating slab 2 is formed is attached. A plurality of stat bolts 4 are fixed to the outer periphery of the hollow insert metal fitting 3, and these stat bolts 4 are embedded when molding the floating slab 2, that is, when casting and curing precast concrete, and anchor bolts. It plays the role of. Further, a plurality of insert nuts 5 are provided on the outer periphery of the insert metal fitting 3, and a hole 7A into which the bolt 7 is screwed into the insert nut 5 is formed on the inner surface side of the insert metal fitting 3. The stat bolt 4 and the insert nut 5 are embedded inside the precast concrete. A hollow pedestal 6 is inserted into the hollow insert metal fitting 3 and a bolt 7 is screwed into the insert nut 5 from the inside of the pedestal 6 to fix the pedestal 6 to the insert metal fitting 3. On the lower part of the pedestal 6, a vibration-proof rubber 9 is mounted on a lower bracket 8 fixed to the rigid roadbed 1.
An upper bracket 10 to be mounted on is attached. A lid 20 is attached to the upper end of the pedestal 6.

The insert fitting 3 is, as shown in FIG.
A plurality of bosses 11 are provided on the inner peripheral surface of the pedestal 6 to prevent rattling when the pedestal 6 and the insert metal fitting 3 are fastened by the bolts 7, and the bolts 7 are used to prevent the reaction force of the compressive load applied to the vibration-proof rubber 9. When receiving, the upper end of the pedestal 6 is in contact with the boss 11, so that the compressive strength of the boss 11 also receives it.
The reaction force of the compressive load applied to the anti-vibration rubber 9 is efficiently received to ensure safety. Further, a hole for screwing the bolt 7 into the insert nut 5 is indicated by reference numeral 7A. Also,
A flange 3A is attached to the lower portion of the insert metal fitting 3, and a rib 3B is erected on the circumference of this flange 3A so that the compressive load applied to the vibration-proof rubber 9 can be efficiently taken up by the compressive strength of the floating slab 2. . Also,
With respect to the vibration from the train, a plurality of stat bolts 4 are provided on the circumference of the insert fitting 3 to improve the adhesion to concrete and strengthen it.

FIG. 3 is a plan view of FIG. 2, and shows a state in which the bosses 11 are provided at four locations on the upper part and four locations on the bottom of the insert fitting 3 and the ribs 3B are provided.

4 and 5 show the pedestal 6, in which a hole 7B corresponding to the insert nut 5 is opened and a groove 12 into which the boss 11 is fitted is formed. Further, a mounting hole 13 for mounting the upper bracket 10 is formed in the bottom portion.

The upper bracket 10 has a cylindrical portion 10A,
The tubular portion 10A is fitted into the hollow tubular portion 8A of the lower bracket 8 and is regulated so that the upper bracket 10 does not move laterally.

[0013]

As described above, according to the present invention, a hollow insert fitting that vertically penetrates the floating slab is attached when forming the floating slab, and the insert fitting is provided with an insert nut embedded in the floating slab. Insert the hollow pedestal into the insert metal fitting, screw the bolt into the insert nut from the inside of the pedestal to fix the pedestal to the insert metal fitting, and the lower part of the pedestal fixed to the rigid roadbed. Since the bracket is attached, maintenance and replacement of the anti-vibration rubber can be performed from the top of the floating slab, and the work becomes easier. Further, the insert metal fitting is firmly fixed to the floating slab by embedding the insert nut, and the pedestal is fixed to the insert metal fitting with a bolt, so that the robustness at this portion is also improved. Further, since the anti-vibration rubber is interposed between the upper bracket and the lower bracket, the anti-vibration rubber can be fixed firmly. Further, by fixing a plurality of stat bolts embedded in the floating slab to the outer periphery of the insert fitting, the structure becomes even stronger. Further, a flange is provided at the lower end portion of the insert fitting, and a rib embedded in the floating slab is provided on the circumference of the flange, whereby the insert fitting is further integrated with the floating slab. In addition, by providing an appropriate number of bosses on the inner peripheral surface of the insert fitting and by providing a groove on the pedestal that allows these bosses to pass, rattling of the pedestal is prevented and the reaction force of the compression load applied to the anti-vibration rubber is prevented. It can be received with the bolt, and it has an efficient and safe structure.

[Brief description of drawings]

FIG. 1 is a sectional view showing a preferred embodiment of the present invention.

FIG. 2 is a sectional view of an insert fitting.

FIG. 3 is a plan view of an insert fitting.

FIG. 4 is a front view of a pedestal.

FIG. 5 is a plan view of a pedestal.

FIG. 6 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Rigid roadbed 2 Floating slab 3 Insert metal fitting 4 Stat bolt 5 Insert nut 6 Pedestal 7 Bolt 8 Lower bracket 9 Anti-vibration rubber 10 Upper bracket

Claims (4)

[Claims] 1. A vibration isolator for a track, which elastically supports a floating slab that supports rails via a rail coupling device on a rigid roadbed, wherein a hollow pier that vertically penetrates the floating slab during molding of the floating slab. Attach the insert metal fitting, and install the insert nut embedded in the floating slab on the insert metal fitting.Insert the hollow pedestal into the insert metal fitting and screw the bolt from the inside of the pedestal to the insert nut to fix the pedestal to the insert metal fitting. A vibration damping device for a track, comprising an upper bracket mounted on a vibration damping rubber on a lower bracket fixed to a rigid roadbed. 2. The vibration isolator for a track according to claim 1, wherein a plurality of stat bolts embedded in the floating slab are fixed to the outer periphery of the insert fitting. 3. A flange is provided at a lower end portion of the insert metal fitting, and a rib embedded in the floating slab is provided on a circumference of the flange.
The anti-vibration device for tracks described in. 4. The insert metal fitting is provided with an appropriate number of bosses on an inner peripheral surface thereof, and a pedestal is provided with a groove for allowing the bosses to pass therethrough.
The vibration isolation device for a track according to the item.