JPH10317303A - Crosstie - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a tilt by connecting the upper face sections and lower face sections of horizontal members with upper face connecting members and lower face connecting members, and providing intermediate connecting members between the opposite faces of the horizontal members at the positions surrounded by both connecting members. SOLUTION: A horizontal member 3 is formed with a foam body of a thermosetting resin such as a hard urethane resin reinforced with fibers such as glass fibers. An upper face connecting member 21, a lower face connecting member 22, and an intermediate connecting member 25 are formed with the same material as that of the horizontal member 3. Two horizontal members 3 supporting rails 2 are arranged in parallel. The upper face sections and lower face sections of the horizontal members 3 are connected by the upper face connecting members 21 and lower face connecting members 22 via adhesion by an adhesive such as an epoxy resin. The intermediate connecting members 25 are provided between the opposite faces 27 of the horizontal members 3 and between the upper face connecting members 21 and lower face connecting members 22 via adhesion by the adhesive to form a crosstie 1. The whole shape of the crosstie 1 is made large, the lower face connecting members 22 are completely buried in ballast, and a tilting phenomenon can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to sleepers. The sleeper of the present invention is suitable as a sleeper at a branch portion of a rail.

[0002]

2. Description of the Related Art Pillows are traditionally made of wooden or PC (Prestr
essed Concrete) Concrete products were commonly used. However, wooden pillows have shortcomings such as short service life and low track bed resistance, and have a tendency to refrain from adopting them due to depletion of timber resources.

[0003] On the other hand, although PC sleepers are resistant to bending loads and have a long service life, they are unsatisfactory because of their heavy weight and laying work. Also, PC sleepers are vulnerable to vibration and are not suitable for branch portions of rails and the like. Therefore, in recent years, synthetic pillows made of fiber reinforced resin have attracted attention as an alternative to these pillows.
Synthetic sleepers are made of a molded body composed of, for example, long glass fibers and a foamed resin such as hard foamed polyurethane, and are not only light and strong but also excellent in durability. Synthetic sleepers are resistant to vibration and are therefore preferred for rail branching.

[0004]

The pillows are laid in a roadbed piled on a roadbed. A ballast bed, a concrete bed, a slab bed, or the like is selected depending on road conditions. Ballast ballasts are used more often than concrete or slab ballasts because of their low construction costs and the ease with which track deviations can be corrected relatively easily. The ballast distributes the load applied to the pillows from the train via the rails widely and transmits it to the roadbed, prevents the lateral movement of the vehicle, the movement of the pillows due to the expansion and contraction of the rails, and absorbs the vibration energy accompanying the vehicle running. , Gravel and crushed stone are adopted.

[0005] By the way, the sleepers laid at the junctions and the joints of the rails are liable to cause a so-called "tilt" phenomenon in which the track goes down and sometimes the skid shifts due to the passage of the train, and the track goes up and down. As described above, synthetic sleepers are diversified at the branch portion of the rail. However, since the synthetic sleepers are light in weight, they are particularly susceptible to the "tilting" phenomenon. Accordingly, the present invention is directed to the development of a sleeper which is less likely to cause the "tilt" phenomenon, by focusing on the above-mentioned problems of the prior art.

[0006]

According to a first aspect of the present invention, there is provided a vehicle having a plurality of cross members for supporting rails, wherein upper and lower portions of the cross members have upper surfaces. A pillow which is connected by a connecting member and a lower surface connecting member, and is located at a position surrounded by the upper surface connecting member and the lower surface connecting member, and an intermediate connecting member is provided between opposing surfaces of the cross members. It is.

The sleeper of the present invention has cross members which support rails are connected to each other, and have a large overall shape and a large contact area with a ballast. Also, in the sleeper according to the present invention, not only the upper surface but also the lower surface are connected by the lower surface connecting member, so that the lower surface connecting member is completely embedded in the ballast. Therefore, the pillow of the present invention is
High resistance to up and down movement, and the "tilt" phenomenon is unlikely to occur. Further, the pillow of the present invention is provided with an intermediate connecting member, so that it is integrally formed as a whole and has high rigidity,
Hard to bend. The weight of the train is therefore distributed throughout the pillows and does not move up or down in parts.

According to a second aspect of the present invention, which is an improvement of the above-described invention, an upper surface connecting member and a lower surface connecting member are provided at an intermediate portion between the rail support portions and at both ends of the cross member. The sleeper according to claim 1, wherein an upper connecting member, a lower connecting member, and an intermediate connecting member are provided.

In the sleeper according to the present invention, the upper surface connecting member and the lower surface connecting member are provided between both ends of the cross member and between the rail supporting portions. Hateful. Further, in the sleeper according to the present invention, since the upper surface connecting member, the lower surface connecting member, and the intermediate connecting member are provided on the rail supporting portion to which the most weight is applied, the material is not wasted.

[0010]

Embodiments of the present invention will be described below. FIG. 1A is a perspective view of a sleeper according to an embodiment of the present invention, and FIG. 1B is a sectional view taken along the line A-A. FIG. 2 is a cross-section of the pillow of FIG.
It is a perspective view of the joint part with a lower surface connection member and an intermediate connection member. FIG. 3A is a perspective view of a sleeper according to another embodiment of the present invention, and FIG. 3B is a BB cross-sectional view thereof. FIG. 4 is a schematic perspective view of a railway line in which rails are mounted on the sleepers of the embodiment of FIG.

The sleeper 1 according to the embodiment shown in FIG. 1 is a branch sleeper arranged at a branch portion of a rail. The sleeper 1 according to the present embodiment is obtained by arranging two cross members 3 supporting the rails 2 in parallel and connecting them with a connecting member, as if connecting the conventional sleepers (linear pillows) in a ladder shape. You can say that.

That is, the cross member 3 is the same as the conventional linear synthetic sleeper, and is made of fiber reinforced resin. Here, as the fibers for reinforcing the resin, for example, inorganic fibers such as glass fiber, carbon fiber, metal fiber, and ceramic fiber, and organic fibers such as aromatic polyamide fiber can be used. Among the above fibers, the use of glass fiber is most recommended from the viewpoint of strength and economy. The fiber form is preferably a long fiber form such as yarn, cloth, roving, roving cloth, cross mat, and, if necessary, combined with short fibers such as chips and middle fibers and hollow fillers such as shirasu balloons. May be.

As the resin, a thermosetting resin is used, and a resin which forms a hard foam is particularly preferable. Specific types of resins include, for example, hard urethane resins, unsaturated polyester resins, epoxy resins, and the like. The most suitable material for the cross member 3 is a foam in which a hard urethane resin is reinforced with long glass fibers (for example, Eslon Neo-Lumber FFU manufactured by Sekisui Chemical Co., Ltd.). The foam in which the above-mentioned hard urethane resin is reinforced with long glass fibers is also referred to as synthetic wood, and is used as the cross member 3 in a single layer or by laminating several pieces with the fiber directions orthogonal to each other. .

The sleeper 1 according to the present embodiment is shown in FIGS.
Like FIG. 2, the horizontal members 3 are connected by a plurality of portions.
More specifically, in the pillow 1, the upper surface connecting member 2
1 and the lower surface connecting member 22 are provided on the rail support portion as shown in FIG. 1, between the upper surface connecting member 21 and the lower surface connecting member 22, and between the opposing surfaces 27 of the cross member 3. A connecting member 25 is provided.

In the sleeper 1 of the present embodiment, the upper surface connecting member 21 has a plate shape and is disposed in a carved groove provided on the upper surface of the cross member 3. Therefore, the upper surface of the upper surface connecting member 21 and the upper surface of the cross member 3 are in the same plane. The lower surface connecting member 22 has a prismatic shape. The intermediate connecting member 25 has a plate shape, and is arranged in an upright state between the upper surface connecting member 21 and the lower surface connecting member 22. The material of the upper surface connecting member 21, the lower surface connecting member 22, and the intermediate connecting member 25 is the same as that of the cross member 3. An adhesive such as an epoxy resin is used to connect the cross member 3 to each of the connecting members 21, 22, and 23.

Next, another embodiment will be described with reference to FIGS. The pillow 30 shown in FIG. 3 and FIG.
In addition to the upper surface connecting member 21, the lower surface connecting member 22, and the intermediate connecting member 25 of the sleeper 1, both ends of the cross member 3 are connected by the upper surface connecting member 10 and the lower surface connecting member 11,
Furthermore, the upper surface connecting member 12 and the lower surface connecting member 1 are also provided at the center portion.
3 connected. That is, in the pillow 30
Both ends of the cross member 3 are the upper connecting member 10 and the lower connecting member 1
1 and are also connected by the upper surface connecting member 12 and the lower surface connecting member 13 at the center portion. The rail support portion is provided with an upper surface connecting member 21, a lower surface connecting member 22, and an intermediate connecting member 25.

In the embodiment described above, two cross members 3
In the present invention, the number of cross members 3 is 2
The present invention is not limited to books, and may be three or more. The layout of the upper surface connecting member, the lower surface connecting member, and the intermediate connecting member is not limited to the present embodiment. It is desirable to use the same material as the cross member 3 as the material of each connecting member, but it is also possible to use steel or FRP.

[0018]

The sleeper of the present invention has a large overall shape and a large contact area with the ballast. In the sleeper according to the present invention, the lower surface connecting member is completely embedded in the ballast. Therefore, the sleeper of the present invention has a high resistance to vertical movement, and has an effect that the "tilt" phenomenon hardly occurs. Moreover, the pillow of the present invention is integrally formed as a whole, has high rigidity, and does not easily bend. Therefore, the weight of the train is distributed over the entire pillow, does not move up and down in part, and the "tilt" phenomenon is further suppressed. Further, the sleeper according to the second aspect has an excellent effect that the material is not wasted because the upper surface connecting member, the lower surface connecting member, and the intermediate connecting member are provided on the rail supporting portion to which the most weight is applied.

[Brief description of the drawings]

FIG. 1A is a perspective view of a sleeper according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line AA.

FIG. 2 is a perspective view of a connecting portion of a crosspiece of the sleeper of FIG. 1, and an upper connecting member, a lower connecting member, and an intermediate connecting member.

FIG. 3A is a perspective view of a sleeper according to another embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along line BB.

FIG. 4 is a schematic perspective view of a railroad track with rails mounted on a sleeper according to the embodiment of FIG. 3;

[Explanation of symbols]

 1,30 Sleeper 2 Rail 3 Cross member 10,12,21 Upper surface connection member 11,13,22 Lower surface connection member 25 Intermediate connection member 27 Opposite surface of cross member

Claims (2)

[Claims] An upper surface and a lower surface of the horizontal members are connected by an upper surface connecting member and a lower surface connecting member, and are surrounded by the upper surface connecting member and the lower surface connecting member. A sleeper, wherein an intermediate connecting member is provided between opposing surfaces of the cross member. 2. An upper surface connecting member and a lower surface connecting member are provided at an intermediate portion between the rail supporting portions and both ends of the cross member, and an upper surface connecting member, a lower surface connecting member, and an intermediate connecting member are provided at the rail supporting portion. The pillow according to claim 1, characterized in that it is provided.