JPH062301A - Manufacture of sleeper, utilizing used tire - Google Patents

Abstract

PURPOSE:To greatly improve shock-damping property by applying a flat sheet made from a used tire to the bottom surface of a concrete sleeper. CONSTITUTION:The shoulders 7 of a used tire 4 is cut off along the cutting lines a-a and a'-a', leaving a ring. The ring consisting of the shoulders 7 and a crown 8 is cut, spread and pressed with a heated iron, etc., making a flat strip 3. This strip 3 is applied to the bottom surface 9 of a concrete sleeper body 2. The above process reclaims a used tire, absorbs and damps vibration, and suppress damages and scattering of gravels.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing sleepers using old tires, which uses old tires as cushioning materials.

[0002]

2. Description of the Related Art Recently, sleepers made of prestressed concrete have been widely used due to lack of wood and the like, but they have drawbacks that the balse is more likely to be damaged and scattered and vibrates more violently than wood sleepers. For this reason, a cutout with a certain depth is provided on the side and the lower end of the concrete sleeper, the cutout is flush with the side and the end of the concrete sleeper, and has a box-like shape with a required thickness at the bottom. Japanese Patent Laid-Open No. 60-120001 discloses a roadbed elastic sleeper which is covered with an elastic material so that no step is formed between the elastic covering material and the side surface and the end surface of the concrete sleeper.

In addition, old tires have no suitable reuse method other than being used as a buffer for ships when they come to berth, and when burned and discarded, they cause pollution and are simply left in piles. The number has been increasing year by year.

[0004]

DISCLOSURE OF THE INVENTION An object of the present invention is to manufacture a sleeper using old tires, which is effective as a method for reusing old tires, in which a sleeper capable of suppressing damage to a ball and absorbing vibration can be obtained. To provide a method.

[0005]

In order to solve the above-mentioned drawbacks and to achieve the above-mentioned object, the method of manufacturing an old tire-utilized sleeper according to the present invention includes cutting off both side portions of an old tire to remove the old tire. After cutting the crown portion and the shoulder portion along one radius, they are flattened to form a flat sheet, and the flat sheet is attached to the lower surface of the sleeper body.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1, a sleeper 1 has a cushioning material made of a flat sheet 3 made of old tires 4 (see FIG. 2) attached to a lower surface 9 of a sleeper body 2 made of concrete such as prestressed concrete.

In order to manufacture the flat sheet 3, as shown in FIG. 2, both side portions 6 including the left and right bead portions 5 of the old tire 4 are surrounded by the shoulder portion 7 along the cutting lines a, a '. After cutting off over the entire length in the direction and leaving only a part of the crown portion 8 and the shoulder portion 7, the remaining crown portion 8 and the shoulder portion 7 are cut along a radius as shown in FIG.

Next, the crown portion 8 and the shoulder portion 7 are opened and heated by an iron, and the strip-shaped flat sheet 3 is formed from the remaining shoulder portion 7 and crown portion 8 excluding the bead portion 5 and the side portion 6. Form the flat sheet 3
Is used as a cushioning material and is attached to the lower surface 9 of the sleeper body 2 similar to a conventional concrete sleeper with an adhesive or the like.

The size of a general sleeper main body 2 has a width of 240
mm, height 174 mm, length 2000 mm, the Tokaido Shinkansen sleeper main body 2 has a trapezoidal cross section with an upper side of 172 mm, a lower side of 330 mm, and a height of 255 mm, the length is 2400 mm, and the size of an old tire is 4t truck for diameter 102
0 mm, width 200 mm, diameter 750 mm, width 140 mm for small trucks, diameter 540 mm, width 110 mm for ordinary passenger cars. Therefore, when a flat sheet 3 manufactured from old tires 4 for 4t trucks and light trucks is attached to a general sleeper body 2, and a flat sheet 3 manufactured from old tires 4 for 4t trucks is used for the Tokaido Shinkansen. When it is attached to the sleeper main body 2, the length of the flat sheet 3 remains, but in this case, the flat sheet 3 may be cut, and as shown in FIG. It may be attached so as to wrap the end face.

It is not necessary to stick the flat sheet 3 on the entire lower surface 9 of the sleeper body 2, and even if the width and length of the flat sheet 3 are smaller than the width and length of the lower surface 9 of the sleeper body 2,
It is possible to sufficiently absorb the impact, and it is also possible to cut the flat sheet 3 into an appropriate size and attach it to the lower surface 9 of the sleeper body 2 in places as shown in FIG. Also, the flat sheet 3
There may be a plurality of layers and a metal plate, for example, an iron plate may be interposed between them, and screws are further planted in the iron plate to insert the sleeper main body 2, and a nut is screwed to the protruding portion. The flat sheet 3 and the sleeper body 2 may be joined together.

[0011]

As described above, according to the method of manufacturing sleepers using old tires of the present invention, the crown portion and the shoulder portion left after cutting off both side portions of the old tire are provided along one radius. By cutting and then flattening it out, it is possible to reuse some of the old tires that were all discarded in the past as cushioning materials for sleepers, and reduce waste. , Absorb the vibration applied to the sleeper by the old tire attached as a cushioning material,
As a result, vibration is reduced, damage and scattering of the ballast can be suppressed, and the performance as a sleeper is significantly improved.

[Brief description of drawings]

[Fig. 1] Bottom perspective view of sleepers

FIG. 2 is a cross-sectional view of an old tire showing a first step in the manufacturing process of a flat sheet.

FIG. 3 is a side view of an old tire showing a second stage of the manufacturing process of the flat sheet.

[Fig. 4] Perspective view of another sleeper

[Fig. 5] Bottom perspective view of still another sleeper

[Explanation of symbols]

 1 sleeper 2 sleeper main body 3 flat sheet 4 old tire 5 bead portion 6 side portion 7 shoulder portion 8 crown portion 9 lower surface

Claims (1)

[Claims] 1. After cutting off both side portions of an old tire and cutting a crown portion and a shoulder portion of the old tire along a radius, the flat tire is flattened to form a flat sheet, and the flat sheet is used as a sleeper. A method for manufacturing sleepers using old tires, which is characterized in that it is attached to the lower surface of the main body.