JPH03121901A - Noise preventive method and device for rolling stock - Google Patents

Abstract

PURPOSE:To reduce noise by providing in parallel rails which extend from a low position to a high position and further from the high position to a low position on the inside of regular rails at a predetermined section, and providing in parallel hard rubber tires which act upon these high positioned rails, on the inside of regular rails. CONSTITUTION:A pair of inside rails 2 are provided in parallel and at slight intervals on the inside of regular rails 1. These inside rails 2 are ascended against regular rails 1 with a slight inclination at a low noise zone, and made to be positioned higher than the surfaces of regular rails 1, and lowered to the former height through a horizontal part. Meanwhile, smaller diameter inside wheels 4 fitted in shrinkage with hard rubbers 8 are coaxially provided on the inside of regular wheels 3. As a result, inside wheels 4 come into contact with inside rails 2 at the low noise section, and regular wheels 3 are separated from regular rails 1. Accordingly, low noise can be realized as travel is performed on rubber wheels.

Description

[Detailed Description of the Invention] 1- [Industrial Application Fields] The present invention relates to the noise caused by vehicle traffic, which is a problem on bridges between fixed roads, for example between Honshu and Shikoku. It is.

[Conventional technology] Conventional noise prevention measures include reducing the weight of vehicles and installing soundproof walls, but these measures have their limits as soundproofing measures, and in the end, soundproofing devices were not installed in buildings along railway lines. The situation has become unavoidable.

[Problem to be solved by the invention] As mentioned in the conventional technology, reducing the weight of vehicles, constructing soundproof walls, soundproofing measures for buildings, etc. do not provide basic solutions, Once the IiO was released, the noise would continue as it was, and this would not be a fundamental solution.

The present invention was made in view of these problems, and
The first objective is to prevent noise within a certain range without reducing speed by controlling the noise generated between the wheels and rails as much as possible. This makes it possible to prevent, for example, the section height gf vibration of a fixed-length iron bridge from exceeding a certain level.

[Means for Solving the Problems] In order to achieve the object described in (11), in the noise prevention device of the present invention, another pair of rails parallel to the regular pair of rails is arranged for a required length, and The rail gradually slopes upward from the bottom of the surface of the regular rail and occupies a high position, and then gradually decreases from the high position to the low position, while the regular wheels corresponding to the regular rail ,
A small-diameter wheel facing the inner high-position rail is provided coaxially with the regular wheel, and only in the required section (for example, a railway bridge or a densely populated area), the regular wheel naturally transitions from the inner wheel to the inner wheel. This is a noise prevention measure for railway vehicles in which the noise of frictional vibrations between metals is absorbed by using tires with elasticity made of hard rubber or other materials, or wheels made of these materials heat-fitted.

In this case, the inner I4 wheel or tire is formed to have a small diameter so as not to cause problems when switching points, etc., and is extremely effective for a substantially straight course of a certain section. The rails may be located outside the regular rails, or the wheels may be of a double configuration so as to protrude behind the regular wheels.

[Function] Instead of sliding friction between iron and iron like a normal rail, there is elastic material (ilt, width side) and iron (rail side).
This is extremely effective in noise prevention because it is caused by contact with the elastic material, and in this case, the degree of wear on the elastic material side is limited to a certain area, making it possible to eliminate extreme wear.

[Example] Examples will be described with reference to the drawings.

In Figures 11A to 5, ■ is the regular rail, and 2 is the inner rail that has been added with a slight gap d between them.
1, both ends 2' of the inner rail 2.2
, 2' gradually rises from the bottom of the regular rail 1 at a very slight inclination to 1 and maintains the horizontal position at a constant height as shown in the figure at a higher position than the surface of the regular rail 1, It's like carrying a vehicle.

Next, on the wheel side, inner wheels 4.4"C regular!tt, inner wheels 4.4"C regular!tt, wheels 3.3, which are shrink-fitted with hard rubber 8 with a slightly smaller diameter added at appropriate intervals inside the regular wheels 3, 3. It is also provided on the city shaft 5, and 6 is a bearing box.

It goes without saying that the wheels in FIGS. 4(a) and 4(b) are tire-type wheels, and the rail side is also compatible with these wheels. (c) is wheel-shaped.

In the one shown in FIG. 5, a wheel frame is provided directly on the back side of a regular wheel 3, and a hard rubber 8 is shrink-fitted thereto.The rail can also be a conventional one and can be substantially used.

In the present invention having the above configuration, the train gradually touches the second rail, the inner rail 2.2, and is gradually lifted along the gentle slope from before the railway bridge. Inner heavy wheels 4, 4 with shrink fit
The metal and hard rubber come into contact with each other, and the generation of frictional vibration noise itself is specially controlled. ), their effect is outstanding in the case of a complete tire type.

- Although the rails added on the inside have been described, the same applies to the second rail added on the outside, and in this case, it is suitable for narrow gauge rails or rails with many curves.

[Effect of the invention] - As mentioned above, by adding the inner (outer) rail -
・Because the vehicles run on fixed sections with hard rubber shrink-fit wheels and tires, the noise generation itself has been successfully reduced. The fact that the train can run without any problems is the same as in the past; for example, in the case of a freight train, it is sufficient to reduce the speed and reduce the frictional noise as much as possible.

Also, since this running section is a limited and fixed section, it is often installed in a place close to a straight line.
There is less risk of abrasion or derailment, and it is effective in preventing use.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the rail according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a front view showing an example of the wheel of the present invention corresponding to the rail of FIGS. 1 and 2. , Figures 3 (a) and (b) show an example of a tire type, (c) shows a hard rubber shrink fit, and Figure 5 shows a hard rubber shrink fit on the back side of a regular wheel 3. It has been established. 1 - Regular rail 2 - Inner rail 3 - Regular wheel
4 ~ Inner wheel 5 ~ Axle 8 ~ Hard rubber ℃ 10 U1 Procedure correction band type) November 26, 1990 Patent Application No. 136,893 of 1999 2 Title of invention Noise prevention method in railway vehicle and Relationship between the device 3 and the person making the amendment (patent applicant) 1-9-8 Shiba, Minato-ku, Tokyo Ace 4 Co., Ltd., agent 1-5-4 Nishiikebukuro, Toshima-ku, Tokyo "Drawings" in the specification Column 6, “Brief explanation of the amendment”

Claims (4)

[Claims] (1) While installing another pair of rails parallel to the inside of the regular pair of rails so as to move from a low position to a high position and from a high position to a low position for the required section, Another pair of small-diameter wheels facing the high-position rail are installed coaxially, and elastic tires made of hard rubber or other materials or shrink-fitted wheels are arranged on the wheels, and the inner rail is installed only in the required sections (e.g., iron bridges). A method for preventing noise in a railway vehicle that is driven by the top. (2) The noise prevention method for a railway vehicle according to claim (1), wherein the pair of inner rails are provided outside the regular rails, and the opposing wheels are also provided outside the regular wheels. (3) Another pair of rails parallel to the inside of the regular pair of rails is arranged for a required section, and within the section, the rail gradually rises from below to above the regular rail surface position to reach a high position. and then gradually lowers from a high position to a low position, while on the inside of the regular wheel corresponding to the regular rail, a small diameter wheel opposing the inner high position rail is provided coaxially with the regular wheel, Only in the required section (for example, on a railway bridge), the regular wheels naturally transition to the inner wheels, and then again from the inner wheels to the outer wheels. A noise prevention device for a railway vehicle that absorbs frictional vibration noise between metals using wheels, etc. (4) The noise prevention device for a railway vehicle according to claim (3), wherein the pair of inner rails are provided outside the regular rails, and the opposing wheels are also provided outside the regular wheels.