temporary sleepers

Abstract

Maintain a constant gauge between a pair of temporary rails. [Solution] The temporary sleeper 100 of the present invention is a temporary sleeper that supports a temporary rail that is temporarily laid along the road on the side road and curb of a road that extends through a tunnel under construction, and is equipped with a flat base 1 extending in a predetermined direction Dp, a flat engaging portion 2 that extends from one end 1a of the base 1 so as to bend in the normal direction of one main surface 1d of the base 1, and a pair of rail positioning portions 3, 3 that protrude from the other main surface 1c of the base 1 at a predetermined interval Sp in the predetermined direction Dp and position the temporary rail.

Description

[Technical Field]

[0001] The present invention relates to a temporary sleeper. [Background technology]

[0002] Sleepers for railway rails have been known for some time. Generally, such sleepers are provided to support two rails, spread the pressure of the wheels over a wide area to transmit it to the track bed, and maintain a constant gauge (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 3-119203 Summary of the Invention [Problem to be solved by the invention]

[0004] Tunnel construction requires work such as earthmoving and material transportation depending on the work stage. Since these tasks are performed using machinery, temporary rails are laid to allow these machinery to move within the tunnel. In particular, in the case of road tunnel construction, a road is built within the tunnel. In this case, the road within the tunnel is paved with concrete. To allow such concrete paving equipment to move, a pair of temporary rails is laid on both sides of the road under construction. Therefore, each of the temporary sleepers supporting the pair of temporary rails supports one of the temporary rails. Conventionally, such temporary sleepers are installed temporarily, so they have been made using appropriate materials and used appropriately. Therefore, conventional temporary sleepers for road tunnels have not necessarily addressed the problems that arise when a pair of temporary sleepers each supports one of a pair of temporary rails.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a temporary sleeper and temporary sleeper set that can maintain a constant gauge between a pair of temporary rails. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, a temporary sleeper according to one embodiment of the present disclosure is a temporary sleeper that supports temporary rails that are temporarily laid on the side roads and curbs of a road that extends through a tunnel under construction so as to extend along the road, and is equipped with a flat base that extends in a predetermined direction, a flat engaging portion that extends from one end of the base so as to bend in the normal direction of one main surface of the base, and a pair of rail positioning portions that protrude from the other main surface of the base at a predetermined interval in the predetermined direction and position the temporary rails.

[0007] According to this configuration, a plurality of temporary sleepers are placed on the side road and curb on one side of a road extending through a tunnel under construction, so that the predetermined direction coincides with the width direction of the road, the normal direction of one main surface faces downward, and the engaging portion abuts the road-side end face of the curb. Then, one of a pair of temporary rails is laid between the pair of rail positioning portions of each of the plurality of temporary sleepers. Similarly, a plurality of temporary sleepers for the other of the pair of temporary rails are placed on the side road and curb on the other side of the road, so that the predetermined direction coincides with the width direction of the road, the normal direction of one main surface faces downward, and the engaging portion abuts the road-side end face of the curb. Then, the other of the pair of temporary rails is laid between the pair of rail positioning portions of the plurality of temporary sleepers. When a concrete paving machine runs on a pair of temporary rails in this state, as is well known, the wheel structure exerts a force pushing one of the temporary rails, and ultimately the pair of rail support members, toward the side of the road. However, the temporary sleepers' engaging parts engage with the road-side end faces of the curbs, generating a reaction force against this pushing force. This allows the temporary sleepers to maintain a constant gauge between the pair of temporary rails.

[0008] The pair of rail positioning portions may be formed so as to extend in a rail extending direction that is parallel to the other main surface of the base and perpendicular to the predetermined direction.

[0009] According to this configuration, the pair of rail positioning portions extend in the rail extension direction, so that the temporary rail can be positioned appropriately. [Effects of the Invention]

[0010] The present invention has the effect of providing a temporary sleeper that can maintain a constant gauge between a pair of temporary rails. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing the configuration of a temporary sleeper according to an embodiment of the present invention. [Figure 2] FIG. 2 is a front view of the temporary sleeper of FIG. [Figure 3] FIG. 3 is a plan view of the temporary sleeper of FIG. [Figure 4] FIG. 4 is a schematic diagram showing the state in which the temporary sleepers of FIG. 1 are placed on the side road and curb of a tunnel under construction. [Figure 5] FIG. 5 is a schematic diagram showing one of the temporary rails laid on the temporary sleepers of FIG. [Figure 6] FIG. 6 is a schematic diagram showing a state in which a concrete paving device runs on a pair of temporary rails laid on the curb and side road in a tunnel under construction. DETAILED DESCRIPTION OF THE INVENTION

[0012] Specific embodiments of the present disclosure will be described below with reference to the drawings. Note that, hereinafter, identical or corresponding elements throughout the drawings will be designated by the same reference numerals, and redundant descriptions thereof will be omitted. Furthermore, since the following drawings are for explaining the present disclosure, elements unrelated to the present disclosure may be omitted, dimensions may be inaccurate due to exaggeration or the like, or may be simplified, and the shapes of corresponding elements may not match in multiple drawings. Furthermore, the present disclosure is not limited to the following embodiments.

[0013] (Embodiment)

[0014] [composition] The configuration of the temporary sleeper 100 will be explained below in the order of "overview," "specific example," and "material."

[0015] {overview} Fig. 1 is a perspective view showing the configuration of a temporary sleeper 100 according to an embodiment of the present invention. Fig. 2 is a front view of the temporary sleeper 100 of Fig. 1. Fig. 3 is a plan view of the temporary sleeper 100 of Fig. 1. Fig. 6 is a schematic diagram showing a state in which a concrete paving device 31 runs on a pair of temporary rails 13, 13 laid on a side road 11 and a curb 12 in a tunnel 20 under construction. Hereinafter, for convenience, the up-down direction, left-right direction, and front-rear direction in Fig. 2 may be referred to as the up-down direction, left-right direction, and front-rear direction of the temporary sleeper 100, respectively.

[0016] Referring to Figure 6, the temporary sleeper 100 of this embodiment supports a pair of temporary rails 13, 13 that are temporarily laid on a side road (inspection road) 11 and curb 12 of a road 10 extending through a tunnel 20 under construction so as to extend along the road 10.

[0017] 1 to 3, the temporary sleeper 100 includes a flat base 1 extending in a predetermined direction Dp (left-right direction), a flat engaging portion 2 extending from one end (left end) 1a of the base 1 so as to bend in the normal direction of one main surface (lower surface) 1d of the base 1, and a pair of rail positioning portions 3, 3 protruding from the other main surface (upper surface) 1c of the base 1 at a predetermined interval Sp in the predetermined direction Dp. As will be described later, the pair of rail positioning portions 3, 3 position one temporary rail 13 (see FIG. 5). The portion of the base 1 located between the pair of rail positioning portions 3, 3 will be referred to as a gap portion 4 below. The gap portion 4 supports one temporary rail 13.

[0018] The shape of the engaging portion 2 is determined in consideration of the specifications (standards) of the curbstone 12 so that the engaging portion 2 fits along the inclined end face 12a (see FIG. 4) of the curbstone 12 facing the road 10. The predetermined spacing Sp between the pair of rail positioning portions 3, 3 is determined in consideration of the specifications (standards) of the temporary rail 13 so that the lower end of the temporary rail 13 fits in with a gap. Note that a space is secured between the pair of rail positioning portions 3, 3 and the other end (right end) 1b of the base 1.

[0019] {Example} 2 and 3, the base 1 is formed, for example, in the shape of a rectangular plate that is long in a predetermined direction Dp. The engagement portion 2 is formed, for example, in the shape of a plate that extends from one end (left end) 1a of the base 1, bends slightly downward by 90 degrees with a predetermined curvature R, and then extends diagonally downward to the left. In other words, the base 1 and the engagement portion 2 are formed as a single plate whose main portion extends in the left-right direction and whose left end portion is bent diagonally downward.

[0020] The pair of rail positioning portions 3, 3 protrude at a predetermined interval Sp from the upper surface 1c of the base 1 at a position slightly away from the tip (left end) 2a of the engaging portion 2 in the predetermined direction Dp. The pair of rail positioning portions 3, 3 are formed, for example, so as to extend in a rail extension direction Dr that is parallel to the upper surface (the other main surface) 1c of the base 1 and perpendicular to the predetermined direction Dp. The pair of rail positioning portions 3, 3 are formed, for example, in the shape of a quadrangular prism. Note that the pair of rail positioning portions 3, 3 may be convex portions of any shape.

[0021] The dimensions of the temporary sleeper 100 are, for example, a total length L of 197 mm, a width W of 125 mm, and a thickness T of 9 mm. The curvature R of the curved portion of the engaging portion 2 is, for example, 35 mm, and the hanging (sagging) dimension of the engaging portion 2 is, for example, 82 mm. The predetermined spacing Sp between the pair of rail positioning portions 3, 3 is, for example, 100 mm. The space between the pair of rail positioning portions 3, 3 and the other end (right end) 1b of the base 1 is 12 mm. The curvature R of the upper portion of the end face of the curb 12 (see Figure 4) facing the road is, for example, 25 to 30 mm.

[0022] {Material} The material of the base 1 and the engaging portion 2 of the temporary sleeper 100 is, for example, metal, plastic, wood, etc., and here it is steel. The material of the pair of rail positioning portions 3, 3 of the temporary sleeper 100 is, for example, metal, plastic, etc., and here it is steel. If the material of the base 1, engaging portion 2, and pair of rail positioning portions 3, 3 of the temporary sleeper 100 is steel, the temporary sleeper 100 will have an appropriate weight and can be melted down and recycled.

[0023] [Production method] The temporary sleeper 100 is manufactured, for example, as follows. First, a plate-shaped steel material is processed to a predetermined length and width W, and one end is bent to manufacture the base 1 and the engaging portion 2. Next, a rectangular column-shaped steel material is cut into two column-shaped members each having a length equal to the width W of the base 1. Next, these two column-shaped members are welded to a predetermined position Pp on the top surface 1c of the base 1 so that they extend in the width direction of the base 1 with a predetermined interval Sp between them. This forms a pair of rail positioning portions 3, 3 on the base 1. In this way, the temporary sleeper 100 is manufactured. If the temporary sleeper 100 is made of plastic, the temporary sleeper 100 may be molded.

[0024] [How to use] Fig. 4 is a schematic diagram showing the state in which the temporary sleeper 100 of Fig. 1 is placed on the side road 11 and curbstone 12 of the tunnel 20 under construction. Fig. 5 is a schematic diagram showing the state in which one temporary rail 13 is laid on the temporary sleeper 100 of Fig. 4. In Figs. 4 and 5, cross sections of the road 10, side road 11, and curbstone 12 are shown to clearly show the shape of the curbstone 12.

[0025] Referring to FIG. 4, an unpaved road 10 has been constructed inside a tunnel 20 under construction. Curbs 12 are provided on both sides of the road 10, and a service road (inspection road) 11 is provided between the curbs 12 and the inner surface of the tunnel 20. The temporary sleeper 100 is used while the tunnel 20 is under construction. First, the temporary sleeper 100 is placed on the curb 12 and service road 11 on one side of the road 10 so that the predetermined direction Dp (left-right direction) coincides with the width direction of the road 10. At this time, the temporary sleeper 100 is placed on the curb 12 and service road 11 so that the engaging portion 2 abuts against the end face of the curb 12 on the road side. It does not matter which part of the engaging portion 2 abuts against the end face of the curb 12 on the road side. However, if the tip 2a of the engaging portion 2 abuts against the road-side end face of the curbstone 12, a force will be generated that will cause the engaging portion 2 to float upward when the temporary sleeper 100 is pushed to the side of the road, which is not desirable. Since the temporary rail weighs 22 kg per meter, it is not actually a problem if a force that causes the engaging portion 2 to float upward occurs. Here, the curvature R of the engaging portion 2 is designed to be slightly larger than the curvature R of the upper part of the road-side end face 12a of the curbstone 12, so the engaging portion 2 abuts against the road-side end face of the curbstone 12 at the bend. Therefore, the above-mentioned problem does not occur, which is preferable. The required number of temporary sleepers 100 are placed at predetermined intervals along the road 10.

[0026] 5, next, one temporary rail 13 is placed (laid) in the gap 4 between a pair of rail positioning portions 3, 3 of a required number of temporary sleepers 100 arranged along the road 10. As mentioned above, the temporary rail 13 weighs 22 kg per meter, so its posture is stabilized simply by being placed in the gap 4. Therefore, there is no need to particularly fix the temporary rail 13.

[0027] Next, temporary sleepers 100 are placed on the curb 12 and side road 11 on the other side of the road 10 in the same manner as above, and temporary rails 13 are laid in the gaps 4 between the temporary sleepers 100 in the same manner as above. In this case, the left and right directions of the temporary sleepers 100 are opposite to those of the temporary sleepers 100 placed on one side of the road 10.

[0028] 6 is a schematic diagram showing a state in which a concrete paving device 31 moves on a pair of temporary rails 13 laid in a tunnel 20 under construction. In FIG. 6, the concrete paving device 31 is shown schematically.

[0029] Referring to Figure 6, inside the tunnel 20 under construction, a concrete paving device 31 runs on a pair of temporary rails 13 laid on the side road 11 and curbs 12 on both sides of the road 10 as described above, rotating its wheels 32, paving the road 10 with concrete.

[0030] [Action and effect] 5 and 6, when the concrete paving equipment 31 runs on a pair of temporary rails 13, as is well known, due to the wheel structure, a force is applied from the wheel 32 to push one of the temporary rails 13, and ultimately the pair of rail positioning parts 3, 3, toward the side of the road 10. However, the temporary sleeper 100 generates a reaction force against this pushing force toward the side of the road 10, as the engaging part 2 engages with the end face of the curb 12 on the road 10 side. This allows the temporary sleeper 100 to maintain a constant gauge of the pair of temporary rails 13, 13.

[0031] (Other embodiments) In the above embodiment, a mat made of an elastic material may be placed between the temporary sleeper 100 and the side road 11 and curb 12.

[0032] Many modifications and alternative embodiments will be apparent to those skilled in the art in light of the above description, and therefore the above description should be construed as illustrative only. [Industrial Applicability]

[0033] The temporary sleeper of the present invention is useful as a temporary sleeper that can maintain a constant gauge between a pair of temporary rails. [Explanation of symbols]

[0034] 1 base 2 Engagement part 3 Rail positioning part 4 Narrow Space 10 road 11 Side Road 12 Curb 13 Temporary Rail 20 Tunnel 31 Concrete paving equipment 32 wheels Dp Prescribed direction Dr Rail extension direction L total length R curvature Sp Predetermined interval T Thickness W width

Claims

1. A temporary sleeper supporting a temporary rail that is temporarily laid on a side road and curb of a road extending through a tunnel under construction so as to extend along the road, a flat base portion extending in a predetermined direction; a flat engaging portion extending from one end of the base portion so as to bend in a normal direction to one main surface of the base portion; A temporary sleeper comprising a pair of rail positioning portions that protrude from the other main surface of the base at a predetermined interval in the predetermined direction and position the temporary rails.

2. The temporary sleeper according to claim 1 , wherein the pair of rail positioning portions are formed so as to extend in a rail extending direction that is parallel to the other main surface of the base and perpendicular to the predetermined direction.

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