JP2001081702A - Vibration-proofing apparatus for sleeper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a fear of lift and upward pop-up of an edge of a sleeper from a cover box even if the sleeper is pressed upward due to thermal expansion of a rail. SOLUTION: A cover box 12 encloses the vicinity of each lower edges of a sleeper 11, which is fixed to ballast 13 to support the sleeper 11 on the ballast 13. A side surface vibration insulation pad 14 is interposed between a side wall 11A of the cover box 12 and a side surface of the sleeper 11. A bottom surface vibration isolation pad 15 is interposed between a bottom wall 11B of the cover box 12 and a bottom surface of the sleeper 11. A tie member (bolt) 16 is inserted into the bottom wall 11B of the cover box 12, the bottom surface vibration isolation pad 15, and the sleeper 11 in an almost vertical direction, to thereby tie the cover box 12 and the sleeper 11 together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damper for a sleeper which is sandwiched between a railroad sleeper and a track bed to absorb vibration.

[0002]

2. Description of the Related Art When laying concrete sleepers on a concrete roadbed, the following construction methods have conventionally been adopted. 2A and 2B are diagrams illustrating a conventional method, in which FIG. 2A is a perspective view of a covering box, and FIG. 2B is a cross-sectional view of a railroad track. As shown in FIG. 1B, the sleeper 1 is a rail 2 of a railway.
Is mounted on a concrete roadbed 3 in a state where it is placed. Both ends of the sleeper 1 are supported on a roadbed 3 via a cover box 4 in order to alleviate vibration and impact when the vehicle passes over the rail 2 to prevent noise. This coating box 4
Has a vibration-isolating pad 5 inside, as shown in FIG.
6, 7, and 8 are accommodated. Each anti-vibration pad 5, 6, 7,
8 are respectively sandwiched between the covering box 4 and the sleeper 1,
Absorbs vibration and shock applied to the sleeper 1 when passing through the vehicle.

[0003]

However, the above-mentioned prior art has the following problems to be solved. In the construction method as shown in FIG. 2, the sleeper 1 is supported in the covering box 4 so as to be freely movable in the vertical direction. Sleeper 1
This is because the vibration absorbing effect of the vibration isolating pads 6 and 8 that support the bottom of the housing is not impaired. However, for example, in a track employing long rails and in an area where the weather conditions are severe, when the sleeper 1 is pushed up due to thermal expansion of the rail, the end of the sleeper 1 may be lifted up and jump out of the covering box 4. .
Therefore, in order to solve such a problem, an anti-vibration pad 7 is required.
(Japanese Patent Application Laid-Open No. 7-2)
No. 47503).

However, in such a construction method, the structures of the cover box 4 and the vibration isolating pad 7 become relatively complicated, which may increase the cost. Further, if the structure of the vibration isolating pad 7 is complicated, the thickness of the vibration isolating pad 7 may be insufficient, and the vibration isolating effect may be weakened. On the other hand, the above-mentioned covering boxes 4 are transported to the site in a state where they are mounted on both ends of each sleeper 1 in advance, and are set at predetermined positions. After that, concrete for roadbed is poured. Therefore, the cover box 4 is tied using a packing band or the like so as not to drop off to both ends of the sleeper 1 and transported (Japanese Patent Laid-Open No. 54-105105).

This band is removed after the concrete for the roadbed is poured and before the concrete is solidified, but the work of attaching and removing the band becomes complicated. In addition, since the band is used only during transportation and then removed and discarded, there is a problem that a large amount of waste is generated due to the construction.

[0006]

The present invention employs the following structure to solve the above problems. <Structure 1> A covering box that surrounds the vicinity of the lower end of the sleeper and is fixed on the track bed and supports the sleeper on the track bed, and a side box sandwiched between the side wall of the covering box and the side face of the sleeper. An anti-vibration pad, a bottom anti-vibration pad sandwiched between the bottom wall of the covering box and the bottom of the sleeper, and the bottom wall of the coating box, the anti-vibration pad for the bottom surface, and the sleeper approximately vertically. A sleeper anti-vibration device comprising a binding material that penetrates and binds the covering box and the sleeper.

<Structure 2> In the vibration damping device for a sleeper according to the structure 1, the binding material comprises a bolt penetrating the bottom wall of the covering box, the vibration isolating pad for the bottom surface, and the sleeper substantially vertically. An upper surface pad made of an elastic body is inserted into a washer portion of the bolt on the upper surface of the sleeper, wherein the vibration isolator for a sleeper is inserted.

<Structure 3> In the vibration damping device for a sleeper according to the structure 1, the binding material includes a bolt penetrating the bottom wall of the covering box, the vibration isolating pad for the bottom surface, and the sleeper substantially vertically. A vibration isolator for a sleeper, wherein a coil spring is inserted into a washer portion of the bolt on the upper surface of the sleeper.

<Structure 4> A covering box that surrounds the vicinity of the lower end of the sleeper and is fixed on the track bed and supports the sleeper on the track bed, and is sandwiched between the side wall of the covering box and the side face of the sleeper. Side anti-vibration pad, a bottom anti-vibration pad sandwiched between the bottom wall of the covering box and the bottom of the sleeper, and one end fixed to one side wall of the covering box, A tying member, which is overridden and the other end of which is fixed to the other side wall of the covering box, and a top surface pad is inserted between the tying material and the tie on the upper surface of the tie. Anti-vibration device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below using specific examples. FIG. 1A is a cross-sectional view showing the vicinity of an end of a sleeper showing a sleeper anti-vibration device of the present invention, and FIG. 1B is a top view of a track using the sleeper anti-vibration device of the present invention. As shown in (b) of the figure, the sleepers 11 that support the rails are laid on the track bed 13. As shown in the figures (a) and (b), the covering box 12 surrounds the vicinity of the lower end of the sleeper 11, is fixed on the track bed 13, and supports the sleeper 11 on the track bed 13. Between the side wall 11A of the covering box 12 and the side surface of the sleeper 11, a vibration isolating pad 14 for the side surface is sandwiched. Insulated box 12
The bottom anti-vibration pad 15 is interposed between the bottom wall 11B of the second embodiment and the bottom surface of the sleeper 11.

The structure of the coating box 12 is arbitrary, for example,
It may be the same as the known one shown in FIG. Here, in this specific example, the bottom wall 12B of the covering box and the anti-vibration pad 15 for the bottom surface are used.
And a bolt 16 that penetrates the sleeper 11 substantially vertically. The member including the bolt 16, the nut 17, the washer 18, and the upper surface pad 19 is referred to as a binding material 10 in the present invention. This binding material 10 is thus
The covering box 12 and the sleeper 11 are bound.

The sleeper 11 is made of concrete, iron,
It is made of synthetic resin and other known hard materials. Cover box 1
2 is made of a resin material such as polyester, polypropylene, epoxy, hard urethane, and polyethylene. The side anti-vibration pad 14 and the bottom anti-vibration pad 15
Both, for example, natural rubber, or chloroprene,
It is made of a synthetic rubber such as styrene-butadiene or urethane, or a soft elastic material such as a thermoplastic elastomer, and its structure, shape, and material are selected so as to obtain a required spring constant.

As described above, in an area where weather conditions are severe in a track employing long rails, the thermal expansion of the rail pushes the sleeper 11 up, and the end of the sleeper 11 rises to move above the covering box 12. There was a risk of jumping out. The side anti-vibration pad 14 suppresses horizontal vibration of the sleeper 11, but does not hinder the vertical movement of the sleeper 11 in order to make the anti-vibration effect of the bottom anti-vibration pad 15 effective. Therefore, in the present invention, the covering box 12 and the sleeper 11 are bound by using the binding material 10. In this case, the binding material 10
In order not to hinder the anti-vibration effect of the bottom anti-vibration pad 15,
It is preferable to tighten the nut 17 to such an extent that the bottom anti-vibration pad 15 and the top pad 19 are not compressed. In addition, with this structure, the cover box 12 is fixed to the both ends of the sleeper 11 so as not to fall off, so that it is not necessary to fix the cover box with a band or the like during transportation.

For this purpose, the binding material 10 may have any structure as long as the binding box 12 and the sleeper 11 can be bound. The reason why the binding material 10 penetrates the cover wall bottom wall 12B, the bottom anti-vibration pad 15, and the sleeper 11 substantially vertically is that the binding material has a simple structure, and This is because it can be easily mounted on the vehicle. Moreover, after laying on the roadbed, it is possible to lift the sleeper 11 from the covering box 12 and replace it. The shape of the hole through which the binding material 10 penetrates the bottom anti-vibration pad 15 is arbitrary. When the binding material 10 is a bolt, it may be a round hole or a square hole through which the bolt passes. The anti-vibration pad 15 for the bottom surface may not be present only in the portion where the binding material 10 penetrates.

Washer 1 for bolt 16 on upper surface of sleeper 11
A pad 19 for the upper surface made of an elastic body made of the same material as that of the anti-vibration pad 14 for the side surface is inserted into the portion 8. As described above, when the upper surface pad 19 made of an elastic body is inserted, there is an effect that the sleeper 11 is softly received in an upward direction when the sleeper 11 is subjected to a force that lifts up.

FIGS. 3A and 3B are cross-sectional views of a sleeper for explaining a specific operation of the vibration isolator for a sleeper. FIG. 3A shows a cross section when an upward load is applied, and FIG. This is the state when a directed load is applied. As shown in FIG. 3A, when a load is applied so that the sleeper 11 is lifted, the upper surface pad 19 is sandwiched between the sleeper 11 and the washer 18 and is crushed. The washer 18 prevents further upward movement. Therefore, there is no possibility that the sleeper 11 will jump out of the covering box 12.

On the other hand, when a downward load is applied to the sleeper 11 by the vehicle passing on a rail (not shown) as shown in FIG.
5 is crushed. At this time, a gap may be left between the upper surface pad 19 and the sleeper 11, but this does not cause any problem.

As described above, the upward movement of the sleeper 11 is regulated by the top pad 19 while absorbing the impact, and the downward movement is received by the bottom anti-vibration pad 15 to exert the anti-vibration effect. . Therefore, a sufficient anti-vibration effect is exhibited in any direction. If used only to prevent lifting, as shown in FIG. 1B, it is not always necessary to attach the binding material 10 to all the coating boxes 12. This can reduce equipment costs. On the other hand, in the case where the cover box 12 is attached to the sleeper 11 to prevent the cover box 12 from falling off when being transported, it is preferable to attach the binding material 10 to all the cover boxes 12.

FIG. 4 is a cross-sectional view of a sleeper for explaining a modification of the vibration isolator for a sleeper according to the present invention, wherein (a) shows an example using a contact spring and (b) shows an example using a band. is there.
(A) of the drawing shows a case where the portion of the upper surface pad 19 of the binding material 10 shown in FIG. Also in this case, an appropriate vibration damping effect is exerted against the upward force and the downward force in the same manner as described with reference to FIG. 1
1 is prevented from jumping out.

In the example shown in FIG. 2B, a band 22 is used as the binding material 10. This band 22 is used for covering box 1
One end is fixed to one of the side walls 12A, and the other end is fixed to the other side wall 12A of the covering box 12 over the upper surface of the sleeper 11. Further, on the upper surface of the sleeper 11, the band 2
A pad 23 for the upper surface is inserted between 2 and the sleeper 11.

The material of the band 22 is preferably metal or hard plastic. As means for fixing both ends of the band 22 to the coating box, in addition to using screws as shown in the figure, fitting or other known means can be adopted. Band 22 as a binding material
May be connected to another band fixed to the coating box 12. It is only necessary that both ends of the band 22 are fixed to the covering box 12 via some means. Also,
The shape of this band is arbitrary, and its width can be freely determined according to the strength. It suffices if the band 22 can be arranged so as to ride over the upper surface of the sleeper 11 and surround the sleeper 11.
The reason why the pad 23 for the upper surface is inserted between the band 22 and the sleeper 11 is to perform the operation as shown in FIG.
That is, also in this example, an appropriate anti-vibration effect is exhibited against the vertical movement of the sleeper 11. The thickness and shape of the upper surface pad 23 may be optimized by experiments.

As described above, the sleeper vibration isolator according to the present invention can prevent the end of the sleeper from lifting even when a force is applied to push up the sleeper due to thermal expansion of the rail or the like. Furthermore, even after the cover box is attached to the sleeper and transported, the cover box does not fall off. Therefore, there is no need for complicated work such as attaching a packing band to tie the covering box to the sleeper as in the past and removing the band at the site, and there is no need to dispose of the removed band. is there.

[Brief description of the drawings]

1A is a cross-sectional view showing the vicinity of an end of a sleeper showing a sleeper anti-vibration device of the present invention, and FIG. 1B is a top view of a track using the sleeper anti-vibration device of the present invention.

2A and 2B are diagrams illustrating a conventional method, in which FIG. 2A is a perspective view of a cover box, and FIG. 2B is a cross-sectional view of a railway track.

3A and 3B are cross-sectional views of a sleeper for explaining a specific operation of the vibration isolator for a sleeper. FIG. 3A is a diagram in which an upward load is applied, and FIG. 3B is a diagram in which a downward load is applied. It is the state when it was.

4A and 4B are cross-sectional views of a sleeper for explaining a modification of the vibration isolator for sleepers according to the present invention, wherein FIG. 4A is an example using a contact spring and FIG. 4B is an example using a band.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bundling material 11 Sleeper 12 Coating box 12A Side wall of coating box 12B Bottom wall of coating box 13 Roadbed 14 Anti-vibration pad for side surface 15 Anti-vibration pad for bottom surface 16 Bolt 17 Nut 18 Washer 19 Pad for upper surface

Continuation of the front page (72) Inventor Yasuyuki Kishi 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa F-term in Showa Electric Wire & Cable Co., Ltd. (reference) 2D056 AA02

Claims (4)

[Claims] 1. A covering box which surrounds a lower end portion of a sleeper and is fixed on a track bed and supports the sleeper on the track bed, and a side face sandwiched between a side wall of the covering box and a side face of the sleeper. An anti-vibration pad for the bottom, an anti-vibration pad for the bottom face sandwiched between the bottom wall of the covering box and the bottom of the sleeper, and a substantially perpendicular to the bottom wall of the coating box, the anti-vibration pad for the bottom face, and the sleeper. And a binding material that penetrates the cover box and binds the covering box and the sleeper. 2. The sleeper anti-vibration device according to claim 1, wherein the binding material is formed of a bolt that penetrates a bottom wall of the covering box, the bottom anti-vibration pad, and the sleeper substantially vertically, An upper surface pad made of an elastic body is inserted into a washer portion of the bolt on the upper surface of the sleeper, wherein the vibration isolator for a sleeper is inserted. 3. The vibration damping device for a sleeper according to claim 1, wherein the binding material comprises a bolt that penetrates a bottom wall of the covering box, the vibration isolating pad for the bottom surface, and the sleeper approximately vertically. A vibration isolator for a sleeper, wherein a coil spring is inserted into a washer portion of the bolt on the upper surface of the sleeper. 4. A covering box which surrounds the vicinity of the lower end of the sleeper and is fixed on the roadbed to support the sleeper on the roadbed, and a side face sandwiched between a side wall of the covering box and a side surface of the sleeper. A vibration isolating pad for bottom, a vibration isolating pad for bottom surface sandwiched between a bottom wall of the covering box and a bottom surface of the sleeper, both ends of which are fixed to the covering box via predetermined means, and A strapping material for overcoming a sleeper, and an upper surface pad is inserted between the binding material and the sleeper on an upper surface of the sleeper.