JPH0645442Y2 - Composite sleepers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a composite sleeper.

[Prior Art] Conventionally, as described in Japanese Utility Model Publication No. 61-23042, a synthetic sleeper that has better durability than a wooden sleeper and is lighter in weight, cushioning, and workable than a concrete sleeper. Is proposed.

The synthetic sleeper is formed of a columnar body of thermosetting resin foam reinforced with long fibers embedded in the longitudinal direction. As described above, according to this synthetic sleeper, since it is made of the thermosetting resin foam reinforced with long fibers, there is no corrosion or damage, and dog nails or screw nails for rail fastening (hereinafter referred to as dog nails are representative. It has a stronger fastening force over a long period of time, etc., and is more durable than wooden ones, and has a density of 1 g / cm ³ or less compared to concrete ones. It is easy to perform laying work and replacement work, and is most suitable as a bridge sleeper. or,
Since it is a foam, it has good cushioning against vibration and shock,
There is no need for cushioning materials like those made of concrete. Further, cutting and cutting can be performed in the same manner as wood, and fastening of rails can be performed using dog nails as described above, so that it can be used by performing on-site processing at the point switching portion and the like.

[Problems to be Solved by the Invention] However, since the synthetic sleepers are lighter than the concrete sleepers, the installability sufficient for stabilizing the road sleepers, that is, the roadbed resistance is slightly low. For this reason, in this composite sleeper, for example, when a large load acts in the traveling direction or the lateral direction of the train in the ballast section, it becomes unstable in the roadbed and the rail width of the rail is accurately maintained. There is also a risk of impairing the original function of the sleepers, such as evenly distributing the vehicle load on the roadbed.

It is an object of the present invention to enhance roadbed resistance while taking advantage of the durability, cushioning property, workability, etc. of synthetic sleepers.

[Means for Solving the Problems] The present invention has a synthetic sleeper body comprising a columnar body of a hard resin foam reinforced by long fibers embedded in the longitudinal direction, and has a specific gravity larger than that of the synthetic sleeper body. A composite sleeper consisting of a combination of a heavy sleeper made of a material, wherein the rail sleepers are composed of the synthetic sleepers, and the other sleepers are composed of the heavy sleepers. is there.

[Operation] According to the present invention, since the rail fastening sleepers are composed of the synthetic sleepers, there are the following effects.

Since the rail fastening sleepers are made of hard resin foam reinforced with long fibers, there is no corrosion or damage, and a strong fastening force of the dog nail for rail fastening can be secured for a long period of time.

Since the rail fastening sleepers are made of foam, they have good cushioning against vibration and shock.

The rail fastening sleepers can be cut or cut in the same manner as wood, and since the rails can be fastened using dog nails as described above, they can be used after being processed on-site at the point switching unit and the like.

Further, according to the present invention, since the other parts other than the rail fastening sleepers are made of heavy sleepers made of concrete or iron, the following operational effects are obtained.

The weight of the entire sleeper is increased, which can increase the roadbed resistance. Therefore, it is possible to construct a sleeper that is sufficiently stable in the roadbed against the load acting in the traveling direction of the train or its lateral direction, accurately keeps the rail width of the rail, and evenly distributes the vehicle load on the roadbed. You can surely fulfill the original function of sleepers such as.

That is, by the above-mentioned items, the roadbed resistance can be enhanced while utilizing the advantages such as durability, cushioning property and workability of the synthetic sleepers.

[Embodiment] FIG. 1 is a perspective view showing an example of a composite sleeper according to the present invention,
FIG. 2 is a schematic diagram showing the combined structure of the composite sleepers of FIG. 1,
FIG. 3 is a schematic diagram showing another combined structure of the composite sleeper, and FIG.
The figure is a schematic diagram showing still another coupling structure of the composite sleeper, No. 5
The figure is a schematic view showing still another coupling structure of the composite sleeper.

The composite type sleeper 10 includes left and right rail fastening sleepers 11 composed of a synthetic sleeper body 20, and an intermediate sleeper portion 12 sandwiched between both rail fastening sleepers 21 is a concrete sleeper body having a larger specific gravity than the synthetic sleeper body 20. It is composed of 30 (weight sleepers). The synthetic sleeper body 20 and the concrete sleeper body 30 are connected to each other through the concave-convex engaging portion 13 as shown in FIG.

Here, the synthetic sleeper body 20 is thermosetting (or thermoplastic).
A resin foam 21, and a columnar body composed of reinforcing long fibers 22,
The long fibers 22 are arranged in the longitudinal direction so that the foam 21
It is distributed and buried in the state. At this time, the synthetic sleeper body 20 has a density of 0.6 to 1.0 g / cm ³ and a reinforcing long fiber content of 40 as described in JP-B-61-23042.
It is suitable if it is in the range of 60% by weight. Also, foam 21
The type of resin constituting the resin may be either thermosetting or thermoplastic. For example, in the case of a thermosetting resin, it is not particularly limited as long as it is thermosetting to give a hard resin foam, and urethane resin, epoxy resin, vinyl ester resin, unsaturated polyester resin, etc. can be used. . Particularly, a urethane resin and an unsaturated polyester resin having foamability are preferable. Further, as the thermoplastic resin, polyvinyl chloride resin, polypropylene resin, polyethylene resin, polystyrene resin, polycarbonate resin or the like can be used.

Further, as the long fibers 22, it is possible to use any inorganic long fibers such as glass fibers, carbon fibers, and inorganic materials such as metal fibers, aromatic polyamide fibers, polyimide fibers, and polyether / ether / ketone fibers. From the viewpoint of strength and economy, glass fiber is preferable. In addition to long fibers, short fibers may be used in combination, and fillers such as calcium carbonate, gypsum and clay may be added.

Next, the operation of the above embodiment will be described.

According to the composite sleeper 10 described above, since the rail fastening sleeper portion 11 is combined with the combined sleeper body 20, the following effects (1) to (3) are obtained.

Since the rail fastening sleepers 11 are made of thermosetting (or thermoplastic) resin foam 21 reinforced with long fibers 22, there is no corrosion or damage, and a strong fastening force of the dog nail for rail fastening is secured for a long time. it can.

Since the rail fastening sleeper part 11 is made of the foam 21, it has a good cushioning property against vibration and shock.

The rail fastening sleepers 11 can be cut or cut in the same manner as wood, and the fastening of the rails can be performed using the dog nails as described above, so that the point switching unit can be used after being processed on site.

Further, according to the composite sleeper 10 described above, the rail fastening sleeper portion 11
Since the portion of the intermediate sleeper portion 12 other than the above is configured by the concrete sleeper body 30, the following operational effects are obtained.

The overall weight of the sleeper 10 is increased, which can increase the roadbed resistance. Therefore, against the load acting in the traveling direction of the train or its lateral direction, the sleepers 10 that are sufficiently stable in the roadbed can be configured, the rail width of the rail can be accurately maintained, and the vehicle load can be evenly distributed on the roadbed. You can surely fulfill the original functions of sleepers such as letting them sleep.

That is, by the above-mentioned items, the roadbed resistance can be enhanced while utilizing the advantages such as durability, cushioning property and workability of the synthetic sleepers.

In addition, in a line sleeper with a height of 14 cm, a width of 20 cm, and a length of 210 cm,
The weight when the whole is a synthetic sleeper is about 43.5 kg. On the other hand, if the above-mentioned normal sleepers have the same structure as the above-mentioned sleepers 10 and the both ends length 70 cm is the synthetic sleepers 20 and the intermediate length 70 cm is the concrete sleepers 30, the weight is about 76 kg, which is about 75% weight. Increase can be realized.

Further, in the practice of the present invention, the composite sleeper body 20 and the concrete sleeper body 30 are connected to each other through the short rebars 14 as shown in FIG. 3 or the long rebars 15 as shown in FIG. It may be one.

Further, in the practice of the present invention, the composite sleeper 100 includes the left and right rail fastening sleepers 101 as shown in FIG.
The intermediate sleeper part 10 that is configured by 0 and is sandwiched between the both fastening sleeper parts 101
2, and the end sleepers 103 on the outer sides of the rail fastening sleepers 101 may be made of concrete sleepers 30. At this time, the above-mentioned height 14 cm, width 20 cm, length 210 cm normal sleepers have the same structure as the above composite sleepers 100, the left and right rail fastening sleepers 101 of each length 50 cm is a synthetic sleeper body 20, and other When the sleepers 102 and 103 are made of concrete sleepers 30, the weight is about 94.6 kg, and a weight increase of about twice can be realized as compared with the case where the whole is made of synthetic sleepers.

In implementing the present invention, the weight sleeper body is not limited to concrete, but may be made of another material such as iron.

[Advantage of Invention] As described above, according to the present invention, the durability of a synthetic sleeper,
It is possible to strengthen the trackbed resistance while utilizing the advantages such as cushioning and workability.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a composite sleeper according to the present invention,
FIG. 2 is a schematic diagram showing the combined structure of the composite sleepers of FIG. 1,
FIG. 3 is a schematic diagram showing another combined structure of the composite sleeper, and FIG.
The figure is a schematic diagram showing still another coupling structure of the composite sleeper, No. 5
The figure is a schematic view showing still another coupling structure of the composite sleeper. 10 …… Composite sleepers, 11 …… Rail fastening sleepers, 12 …… Intermediate sleepers, 20 …… Synthetic sleepers, 30 …… Concrete sleepers, 100 …… Complex sleepers, 101 …… Rail fastening sleepers , 102 …… Intermediate sleepers, 103 …… End sleepers.

Claims (1)

[Scope of utility model registration request] 1. A synthetic sleeper body comprising a columnar body of a hard resin foam reinforced by long fibers embedded in a longitudinal direction,
A composite sleeper comprising a combination of a heavy sleeper made of a material having a higher specific gravity than the synthetic sleeper, wherein the synthetic sleeper constitutes a rail fastening sleeper part, and the heavy sleeper has other sleepers. A composite sleeper characterized by forming a part.