JPH0489901A - Vibration damping rubber pad for rail and its mounting method - Google Patents

Abstract

PURPOSE:To restrain rail from expanding and effectively disperse or absorb vibration and impact by providing striped protrusions on the side of a plate-like rubber pad body with their height mutually different and their width variable. CONSTITUTION:Striped protrusions 4b'..., 4b'', 4b'' are formed in a row on one side or in a symmetric positions of both sides of a plate-like rubber pad body 4a with their height mutually different and their width variable. This vibration rubber pad 4 for a rail is interposed between a rail 1 and a track slab 3 in such a state that the highest striped protrusions 4b'... are compressed to the height of the second highest striped protrusions 4b'', 4b''.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a vibration-damping rubber pad for rails that suppresses rail vibrations and prevents noise during train running, and a method for attaching the same.

[Prior art 1] Conventional techniques for damping rail vibration and preventing noise include applying anti-vibration agents to both sides of the rail by spraying or brushing, as shown in Figure 7 (A). , as shown in (B), there was one in which rubber was pasted on both sides of the rail, and as shown in (C), there was one in which rubber was pressed with a clamp.

[Problem to be Solved by the Invention 1] However, among the conventional rail vibration damping techniques described above, those in which the vibration damping agent (A) is applied are ineffective unless a considerable amount of vibration damping agent is applied, and the above-mentioned Items with (B) rubber pasted on them are not effective unless a fairly thick rubber is used, and items with (C) rubber rubber pressed on are also ineffective.
A clamping device must be attached, which poses problems such as making the device complicated and expensive.

The present invention was made in order to solve the above-mentioned conventional problems, and its purpose is to provide a rail vibration damper that can be easily and inexpensively installed and that can effectively suppress rail vibration. A rubber pad and a method for attaching the same are provided.

[Means for Solving the Problems] The vibration damping rubber pad for rails of the present invention is sandwiched between a rail and a track slab fixed by a fastening device, and has a plate-like rubber pad body with a height on at least one side. It is characterized by having different striped protrusions formed in rows.

Further, the adjacent stripe-like protrusions have different heights.

Furthermore, the present invention is characterized in that the width of the striped projections is varied.

Furthermore, the striped projections are formed on the 1iii11 side of the rubber pad main body, and the striped projections on both sides are arranged at symmetrical positions with respect to the rubber pad main body. In this case, it is preferable that the heights of the opposing striped protrusions on both sides are different from each other.

Furthermore, the method for attaching the damping rubber pad for rails of the present invention is as follows:
It is characterized in that the highest striped protrusion is sandwiched between the rail and the track slab in a compressed state to the extent of the second highest striped protrusion.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is a rail, and an appropriate fastening device 2
It is fixed to the track slab 3 by.

A rubber pad 4 is sandwiched between the rail 1 and the track slab 3.

As shown in FIG. 2, the rubber pad 4 is constructed by forming a large number of striped protrusions 4b in a row on the upper side of a rubber pad main body 4a.

The rubber pad main body 4a has a shape and size that allows it to be placed under the rail 1.

As is clear from FIG. 3, the striped protrusions 4b are formed with two types of heights, . Any two or more types of strife-like protrusions 4b, such as four types, may be used. In this case, care must be taken to ensure that striped protrusions 4b of the same height are not adjacent to each other. Furthermore, the third
In the figure, h is the brightness (thickness) of the rubber pad body 4a.
It is.

Further, in the embodiment described above, the width of the striped protrusions 4b is the same, but by changing the width to change the elastic modulus, a flexible design can be made depending on the load.

FIG. 4 is a graph showing the relationship between compressive displacement (cll) and compressive load (kg+'cm') of the rubber pad 4,
When the high striped projections 4I)' shown in FIG. In addition to the protrusion 4b', the striped protrusion 4b'' is also compressed, and the compressive load is J
#! The height 1 of the rubber pad body 4a increases along B.
1. reach. Furthermore, when compression is continued, in addition to the striped protrusions 4b' and 4b'', the rubber pad body 4a
are also compressed, and their combined compressive load increases along MC. In this way, the rubber pad 4 of the present invention has characteristics that change nonlinearly.

As shown in FIG. 5, the rubber pad 4 shown in FIG. 1 has high striped projections 4b' and low striped projections 4b.
It is compressed and sandwiched so that it has almost the same height as ``.

In this state, since the protrusions are formed in a striped shape, deformation due to vibration in the longitudinal direction of the stripes is prevented, and there is no fear that the interval between the rails 1 will change.

In addition, the high stripe-like protrusions 4b' have already been compressed and deformed under load, but the low stripe-like protrusions 4b'' have not yet received any load, and the stress in the rubber pad body 4a is unevenly distributed.

Therefore, stress and the like propagate diagonally through the rubber pad main body 1 due to compression and shearing, so that vibrations and shocks are also easily dispersed and absorbed.

Furthermore, when the rail 1 vibrates, the high striped protrusions 4b', which have already been compressed, elastically return to their original positions while following the vibrations in the upward direction, and conversely, in the case of the downward vibrations, Since the low striped projections 4b' are elastically compressed, the propagation of vibrations to the track slab 2 is damped.

In the above embodiment, the striped protrusion 4b was formed on one side of the rubber pad body 4a, but the rubber pad of the present invention is not limited to this, and as shown in FIG. Stripe-like protrusions may be formed on both sides of the plate. Rubber pad body 4a
The striped protrusions 4b on both sides of the rubber pad body 4
If the striped projections 4b' on the upper surface are formed at symmetrical positions with respect to a, the corresponding striped projections 4b'' on the lower surface are formed low, and conversely, the striped projections 4b'' on the upper surface are formed low. When the K is low, the corresponding stripe-like protrusions 4b' on the lower surface are formed high, and the stripe-like protrusions 4b of different K are combined in pairs.

[Advantageous Effects of the Invention 1 (1) Since the protrusions of the rubber para R of the present invention are formed in a stripe shape, deformation due to vibration in the longitudinal direction of the stripes is prevented, and as a result, the displacement of the rail in the lateral direction, that is, the rail There is no risk of it spreading.

(2) Since the height of the striped protrusions is varied in several stages, the internal stress becomes non-uniform and rail vibrations and impacts can be effectively dispersed or absorbed.

(3) Since some of the striped protrusions are attached between the rail and the track slab in a compressed state, the protrusions can follow the vibrations of the rail and effectively damp the propagation of the vibrations.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the rubber pad of the present invention sandwiched between a rail and a track slab, Fig. 2 is a perspective view of an embodiment of the rubber pad, and Fig. 3 is a side view of the rubber pad. Figure 4 is a graph showing the compression characteristics of this rubber pad, Figure 5 is a graph showing the compression characteristics of this rubber pad.
The figure is an enlarged explanatory view of the attached state of the rubber pad, Figure 6 is a perspective view showing another embodiment of the rubber pad, and Figures 7 (A) and (B).
(C) is an explanatory diagram showing a conventional rail vibration isolation technology. 1... Rail, 2... Fastening device, 3... Track slab, 4... Rubber pad, 4a, 4b, 4b', 4b''
...Striped protrusions.

Claims (1)

[Claims] 1. Striped protrusions of different heights are formed in a row on at least one side of a plate-shaped rubber pad body, which is sandwiched between the rail fixed by a fastening device and the track slab. A vibration damping rubber pad for rails featuring: 2. The vibration damping rubber pad for a rail according to claim 1, wherein the heights of the adjacent stripe-like projections are different from each other. 3. The vibration damping rubber pad for a rail according to claim 1 or 2, wherein the width of the stripe-like projections is varied. 4. Claim 1, 2 or 3, wherein the striped projections are formed on both sides of the rubber pad body, and the striped projections on both sides are arranged at symmetrical positions with respect to the rubber pad body. Vibration-damping rubber pad for rails described in . 5. The vibration damping rubber pad for a rail according to claim 4, wherein the heights of the opposing striped projections on both sides are different from each other. 6. A method for installing a damping rubber pad for a rail, which comprises sandwiching the highest striped projection between the rail and the track slab in a compressed state up to the height of the second highest striped projection.