JP2880091B2 - Sleeper anti-vibration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device for a sleeper installed on a concrete track floor, and more particularly to an anti-vibration device for a sleeper capable of absorbing loads applied to the sleeper in the vertical and horizontal directions. Things.

[0002]

2. Description of the Related Art As a vibration isolator for a concrete sleeper for a railway, one disclosed in Japanese Patent Publication No. 57-36363 has been proposed. In this prior art, as shown in FIG. 8, a concrete slab 2 constituting a floor of a tunnel is used.
The concrete sleeper 3 supporting the rail 4 is supported on the concrete sleeper 3 via vibration-proof elastic bearing units 5 disposed at both ends of the concrete sleeper 1. ing. Reference numeral 6 denotes a metal fitting for fixing the rail 4 to the concrete sleeper 1, and reference numeral 7 denotes a drainage gutter at the center of the track bed.

The above-mentioned vibration-proof elastic bearing unit 5 is composed of a vibration-proof box 8 and an elastic vibration-proof member housed therein. The anti-vibration box 8 has a bottom plate, both side walls rising from an end of the bottom plate, and an outer end wall, and is open at the top. At the bottom of the vibration isolating box 8, a bottom vibration isolating pad 10 such as a sponge for load bearing is accommodated, on which the lower surface of the concrete sleeper 1 is placed. Vertical vibration applied to 1 is absorbed. Further, between the lower side surface and the lower end surface of the concrete sleeper 1 and both side walls and the outer end wall of the vibration isolating box 8, side vibration isolating pads for lateral pressure bearing are interposed. The horizontal vibration applied to the concrete sleeper 1 is absorbed.

[0004]

In the conventional sleeper anti-vibration device, the end of the concrete sleeper 1 is fitted into the anti-vibration box 8 via the bottom anti-vibration pad 10 and the side anti-vibration pad. At this time, there is no gap in the vibration isolating box 8. For this reason, the deformation of the bottom anti-vibration pad 10 and the side anti-vibration pad is restricted inside the anti-vibration box 8 and cannot be sufficiently deformed, which naturally limits the anti-vibration function. As a method for solving this problem, it is conceivable to provide a certain gap between the bottom anti-vibration pad 10 and the side anti-vibration rubber and the inner surface of the anti-vibration box 8. However, even in this case, a small piece of the sound-deadening ballast filled on the concrete track bed 3 may cause a gap between each anti-vibration pad and the standing wall of the anti-vibration box 8 and a gap between each anti-vibration pad and the concrete sleeper. By penetrating into the gaps and remarkably reducing the expansion and contraction function of each anti-vibration pad, this small piece drops from the gap and fills the gap, so that the deformation of each anti-vibration pad is prevented and the anti-vibration function is reduced There's a problem. An object of the present invention is to provide a sleeper anti-vibration device that solves the above-mentioned problem.

[0005]

To achieve the above object, the sleeper vibration isolator according to the present invention is fitted in a vibration isolator box 8 supported on a concrete roadbed 3 and opened upward. The load-bearing bottom vibration-isolating pad 10 is in contact with the lower surface of the concrete sleeper 1, and the lower side surfaces 17 of the concrete sleeper 1 and the upright wall 1 of the vibration-isolating box 8 are attached.
6 and a dustproof cover 2 having a concave portion along both sides and an end surface of the concrete sleeper 1 on the upper surface of the concrete roadbed 3.
5, the inner edge of the dustproof cover 25 is bent so as to be in close contact with both side surfaces and the end surface of the concrete sleeper 1. The inner edge 32 of the dustproof cover 25 is connected to the lower end surface 18 and the lower end of the concrete sleeper 1. It is characterized in that it is bent along both side surfaces 17 and is sandwiched between the lower side surfaces 17 and the side vibration isolating pads 9 for lateral pressure support.

[0006]

[0007]

According to the construction of the present invention, the dustproof cover 25 extends from the concrete track floor 3 to both sides and the end face of the concrete sleeper 1 and is in close contact with each part. Small lumps of the sound-absorbing ballast 22 to be filled do not enter the gap between the side vibration isolating pad 9 and the standing wall 16 of the vibration isolating box 8 and the gap between the vibration isolating member and both side surfaces of the concrete sleeper 1. Therefore, it does not pass through this gap and enter the gap 21 below the side vibration isolating pad 9.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a vibration isolator of the PC concrete sleeper 1, and FIG. 2 is a plan view. As shown in each figure, both ends of the concrete sleeper 1 juxtaposed to the concrete roadbed 3 are supported by the concrete roadbed 3 via the vibration-proof elastic bearing unit 15.

The vibration-proof elastic bearing unit 15 includes a vibration-proof box 8,
The vibration isolating box 8 includes a bottom vibration isolating pad 10 for load bearing, a side vibration isolating pad 9 made of an elastic material such as rubber or synthetic resin, and a dustproof cover 11. The anti-vibration box 8 is composed of a bottom plate 12, side walls 13 and an outer end wall 14 standing from an end of the bottom plate 12 (hereinafter, the both side walls 13 and the outer end wall 14 are collectively referred to as an upright wall 16), The above-mentioned bottom anti-vibration pad 10 is mounted on the bottom plate 12, and the upper surface of the bottom anti-vibration pad 10 is in contact with the lower surface of the concrete sleeper 1. The side vibration isolating pad 9 is mounted between the upright wall 16 of the vibration isolating box 8 and the lower side surfaces 17 and the lower end surface 18 of the concrete sleeper 1. Also,
The concrete sleeper 1 and the side vibration isolating pad 9 are fixed using fixing screws 20 shown schematically.

According to the sleeper vibration isolator described above, the vertical load applied to the concrete sleeper 1 is reduced by the bottom vibration isolating pad 1.
0, and the horizontal load is received by the side anti-vibration pad 9, whereby the concrete sleeper 1 is smoothly anti-vibrated. In this case, the bottom anti-vibration pad 10
In order to allow the smooth deformation of the vibration isolating pad 9 and the side vibration isolating pad 9 and to ensure the vibration isolating action, the side of the bottom vibration isolating pad 10 and the lower side of the side vibration isolating pad 9 in the vibration isolating box 8. Is
A void 21 is formed.

In this embodiment, the sound-absorbing ballast 22 filled on the concrete floor 3 is provided with a gap 23 between the side vibration isolating pad 9 and the upright wall 16 of the vibration isolating box 8.
In addition, it does not enter the gap 24 between the side vibration isolating pad 9 and the lower side surfaces 17 of the concrete sleeper 1.
The dustproof cover 11 is provided to close the gaps 23 and 24 so as not to enter the gap 21 through the gaps 3 and 24.
In other words, the gap between the upright wall 16 of the vibration isolating box 8 and the lower side surfaces 17 of the concrete sleeper 1 is usually filled with the side vibration isolating pads 9 so that there is almost no gap.
When the side vibration isolating pad 9 expands and contracts with the vibrations repeatedly applied to the space, the gaps 23 and 24 temporarily expand, and small pieces of the ballast 22 are interposed therebetween, thereby damaging the side vibration isolating pad 9, Vibration function. Further, the gap 23,
Small pieces of the ballast 22 sandwiched between 24 gradually fall and fall into the gap 21 due to the repeated expansion and contraction of the side vibration isolating pad 9,
Fill this. In this case, there is no space for the bottom vibration isolating pad 10 and the side vibration isolating pad 9 to escape when deformed, and the vibration isolating function of both members is reduced.

In this embodiment, however, the dustproof cover 11 allows the concrete sleeper 1 and the upright wall 16 of the vibration isolating box 8 to be mounted.
Is closed. The dustproof cover 11 is formed of a sheet material such as rubber or a flexible synthetic resin, and has a concave portion 26 formed by notching the inside as shown in a perspective view in FIG. This dust cover 11
As shown in FIGS. 1 and 2, the edge of the concave portion 26 is disposed along the lower end surface 18 and the lower side surfaces 17 of the concrete sleeper 1. In addition, 3
The two inner edges 27, 27, 27 are formed by being bent upward. The dust cover 11 may be formed by cutting a long sheet material having a predetermined width, or may be formed by a molding die. In the case of using a molding die, the corner may be formed at a right angle at the time of molding, and after the molding, the position of the dotted line 35 may be cut off to cut off the lug 36 to form a radius at the corner.

In this embodiment, as shown in FIG. 1, the horizontal portion of the dustproof cover 11 is disposed on the upper surface of the concrete track floor 3 and the upper surface of the side vibration isolating pad 9 accommodated in the vibration isolating box 8, and The inner edge 27 bent upward is brought into close contact with the upper end surface 28 and the upper side surface 29 of the concrete sleeper 1, and the two are fixed by bonding. The horizontal portion of the dust cover 11 does not need to be fixed to the concrete roadbed 3 in particular. Thus concrete sleeper 1
The soundproof ballast 22 is filled above the dust-proof cover 25 disposed on the upper surface of the concrete track floor 3 so as to cover the outside of the end of the ballast 22. In this case, at the opening of the vibration isolating box 8, the gap formed between the upright wall 16 and the concrete sleeper 1 is covered with the dustproof cover 11, so that a small lump of the ballast 22 does not enter the gap 21 from this gap.

FIGS. 6 and 7 show a second embodiment of the present invention.
In the second embodiment, the dust cover 25 is formed along the concave portion 31 of the dustproof cover 25.
This embodiment differs from the first embodiment in that the two inner edges 32, 32, 32 are bent downward and the inner edge 32 is clamped between the side vibration isolating pad 9 and the concrete sleeper 1. Is the same as in the first embodiment.

More specifically, a fixing screw 20 is provided so as to penetrate downward through the downwardly bent inner edge 32 of the side vibration isolating pad 9 and the dustproof cover 25, and the fixing screw 20 is attached to the concrete sleeper 1. The inner edge 32 of the dustproof cover 25 bent downward is tightly fixed to the lower side surfaces 17 and the lower end surface 18 of the concrete sleeper 1 by screwing into the female screw portion of the embedded screw receiving member 33. The horizontal part of the dustproof cover 25 does not have to be fixed to the upper surface of the concrete roadbed.

Also in the second embodiment, the downwardly bent inner edge 32 of the dustproof cover 25 is closely fixed to the lower side surfaces 17 of the concrete sleeper 1 so that the side vibration isolating pad 9 and the concrete sleeper 1 The gap 24 and
Since the gap 23 between the side vibration isolating pad 9 and the standing wall 16 is covered with the dustproof cover 25, small pieces of the ballast 22 do not enter the gap. In the second embodiment, the small projections 34 protrude from the bottom plate 12 of the vibration isolating box 8, and the small projections 34 are provided so that the bottom vibration isolating pads 10 come into contact with the small projections 34. The gap 21 is prevented from moving, and the gap 21 is securely held.

The design of the present invention can be changed as appropriate in addition to the above embodiment. For example, the planar shapes of the dustproof covers 11 and 25 and the means for fixing to the concrete sleeper 1 are not limited to the configuration of the embodiment.

[0018]

According to the present invention, since the vibration-isolating elastic bearing unit 15 is provided with the dust-proof cover 25, the small mass of the sound-absorbing ballast 22 filled on the upper surface of the concrete roadbed 3 is removed by the side vibration-isolating pad 9 The risk of damage to the side vibration isolating pad 9 by entering the gap between the vibration isolating box 8 and the standing wall 16 of the vibration isolating box 8 and the gap between the side vibration isolating pad 9 and the concrete sleeper 1 can be eliminated. It is possible to eliminate the possibility that the vibration-proof function of the vibration pad 9 is reduced. Furthermore, small pieces of the ballast 22 can be reliably prevented from passing through the gap and entering the gap 21, and the gap 21 can be held for a long period of time, so that the bottom vibration isolating pad 10 and the side vibration isolating pad 9 can be formed. It can be deformed smoothly, and the sleeper's anti-vibration function can be exhibited over a long period of time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a sleeper damper according to a first embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a perspective view of the dust cover shown in FIG. 1;

FIG. 4 is a sectional view of the dustproof cover of FIG.
It is sectional explanatory drawing of the state attached to the vibration-proof box.

FIG. 5 is a sectional view of the dustproof cover of FIG. 3 cut along the line bb;
It is a fragmentary sectional explanatory view of the state attached to the vibration proof box.

FIG. 6 is an enlarged sectional view of a portion A in FIG. 7;

FIG. 7 is a plan view of a sleeper anti-vibration device according to a second embodiment of the present invention.

FIG. 8 is an explanatory sectional view of a conventional sleeper vibration isolator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete sleeper 2 Concrete slab 3 Concrete roadbed 4 Rail 5 Vibration-proof elastic bearing unit 6 Fixture 7 Drain gutter in the center of a roadbed 8 Vibration-proof box 9 Side vibration-proof pad for side pressure bearing 10 Bottom vibration-proof pad for load-bearing 11 Dust-proof Cover 12 Bottom plate 13 Side wall 14 Outer end wall 15 Vibration-proof elastic bearing unit 16 Standing wall 17 Lower side surface 18 Lower end surface 20 Fixing screw 21 Void 22 Ballast 23 Gap 24 Gap 25 Dustproof cover 26 Depression 27 Inner edge 28 Upper end surface 29 Upper part Side surface 31 Recess 32 Inner edge 33 Screw receiving member 34 Small protrusion

Claims (1)

(57) [Claims] 1. supported on a concrete roadbed 3,
In addition, the load-bearing bottom vibration-isolating pad 10 fitted in the vibration-isolating box 8 opened upward is brought into contact with the lower surface of the concrete sleeper 1, and the lower side surfaces 17 of the concrete sleeper 1 and the vibration-isolating box 8. And a dustproof cover 25 having concave portions along both side surfaces and end surfaces of the concrete sleeper 1 on the upper surface of the concrete track bed 3. Then, the inside edge of the dustproof cover 25 is bent so as to be in close contact with both sides and the end face of the concrete sleeper 1, and the dustproof cover 2 is
5 inner edge 32 is the lower end face of concrete sleeper 1
18 and the lower side 17 are bent along
It is clamped between both side surfaces 17 and the side vibration isolating pad 9 for side pressure bearing.
An anti-vibration device for a sleeper, characterized by the following configuration .