Rail support

Abstract

To provide a rail bearer on which a track rail can be stably placed even when the track rail is thermally expanded at a high temperature.SOLUTION: A rail support part 40 of a rail bearer 10 has a substantially triangular cross-sectional shape, and has a vertex, first and second inclined surfaces 41, 42 extending so as to approach each other as going upward and crossing at a vertex 40a, and a hollow part 43 defined between the first and second inclined surfaces 41, 42.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a rail support used when temporarily placing a new track rail beside a railway line during the replacement of the track rail of the railway line.

Background Art

[0002] Conventionally, when replacing a track rail, a new track rail may be temporarily placed beside the railway line (main line) in advance. It is known that worn-out sleepers are arranged every few meters, and a new track rail transported by a vehicle is lowered and temporarily placed on top of them.

[0003] Further, Patent Document 1 discloses a rail stand including a base, support pieces erected on both sides of the base, and rollers on which track rails are disposed and which are rotatably pivoted to the support pieces.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] According to the rail support disclosed in Patent Document 1, it is possible to guide the movement of the rail along the direction parallel to the arrangement of the sleepers and temporarily support the track rail.

[0006] However, when using such a rail support, for example, when replacing a new track rail at night and the track rail has been placed on the rail stand under the scorching sun in midsummer in advance, the track rail expands thermally at high temperature, and due to this effect, the roller may rotate and the rail may come off the rail support.

[0007] The object of the present invention is to improve upon the prior art and provide a rail support that can stably support track rails even when they undergo thermal expansion at high temperatures. [Means for solving the problem]

[0008] To solve technical problems, the present invention relates to a rail support for temporarily holding track rails, having both a vertical and a horizontal orientation.

[0009] The rail support according to the present invention comprises a metal support body and a plurality of legs extending downward from the support body, wherein the support body has first and second ends extending in the lateral direction, first and second side portions extending in the vertical direction spaced apart from each other in the lateral direction, and a rail support portion positioned between the two side portions in the lateral direction and extending in the vertical direction on which the track rail is placed, wherein the rail support portion has a substantially triangular cross-section and is characterized by having a vertex, first and second inclined surfaces extending upward so as they approach each other and intersecting at the vertex, and a hollow portion defined between the first and second inclined surfaces.

[0010] The rail support according to the present invention includes the following preferred embodiments. (1) The track rail is further provided with a movement restricting pin for restricting the vertical movement of the track rail, and a plurality of insertion holes for inserting the movement restricting pin are arranged at a distance from each other in the vertical direction on the first end side of the first side and on the second end side of the second side. (2) The rail support portion has open ends at both ends. [Effects of the Invention]

[0011] According to one or more embodiments of the rail support base of the present invention, since the rail support portion on which the track rail is placed has a substantially triangular cross-section, it is in line contact with the track rail, and even if the track rail undergoes thermal expansion, the force caused by this expansion is distributed, thereby suppressing displacement of the track rail. [Brief explanation of the drawing]

[0012] The drawings illustrate specific embodiments of the present invention relating to this disclosure, including not only essential components of the invention but also optional and preferred embodiments. [Figure 1] A diagram showing the arrangement of the rail support according to the present invention. [Figure 2] A perspective view showing the rail support in use. [Figure 3] A plan view of the rail support structure, seen from above. [Figure 4] Side view of the rail support. [Figure 5] (A) Cross-sectional view along the line V(A)-V(A) in Figure 2. (B) Enlarged view of the area enclosed by V(B) in Figure 5(A). [Figure 6] A figure similar to Figure 2 in one example of the embodiment. [Modes for carrying out the invention]

[0013] Referring to the attached drawings, the details of the rail support 10 according to the present invention are as follows. Furthermore, the following embodiments include, in addition to the essential requirements of the present invention, requirements that can be selectively adopted and requirements that can be appropriately combined.

[0014] As shown in Figure 1, the rail support base 10 according to the present invention is arranged in the required number at appropriate positions beside the track 1 and is used to temporarily place new track rails 5 that will replace the existing track rails 4 on the sleepers 3 of the track 1.

[0015] Referring to Figures 2 to 4, the rail support base 10 is a metal frame having intersecting vertical directions Y, horizontal directions X and thickness directions (up and down directions) Z, and comprises a support base body 20 and a plurality of legs 30 extending downward from the support base body 20.

[0016] The receiving base body 20 is rectangular, and has first and second end portions 21, 22 that are located opposite to each other in the longitudinal direction Y and extend in the transverse direction X, first and second side portions 23, 24 that are spaced apart and opposite to each other in the transverse direction X and extend in the longitudinal direction, and a central transverse portion 25 that extends in the transverse direction X between the first and second end portions 21, 22.

[0017] The receiving base body 20 further has a rail support portion 40 having a substantially triangular cross-section with a vertex 40a, which is located between the both side portions 23, 24 in the transverse direction X and extends in the longitudinal direction Y so as to longitudinally cut the central transverse portion 25.

[0018] A pair of leg portions 30 extending downward from the lower surfaces of the first and second end portions 21, 22 are erected, and the tips (piles) 31 of the leg portions 30 have a sharp shape.

[0019] When arranging the rail receiving base 10 beside the track 1, an operator removes a part of the ballast in the roadbed as needed, checks the height of the rail receiving base 10 with a construction limit gauge, hammers the four corners of the rail receiving base 10 with a tool, and inserts the sharp tips 31 of the leg portions 30 into the roadbed. Then, the operator checks the height of the rail receiving base 10 again with the construction limit gauge to complete the laying.

[0020] After the work, the operator can easily withdraw by pulling the rail receiving base 10 to pull out the tips 31 of the leg portions 30. Thus, since separate piles or the like are not required for laying and withdrawing the rail receiving base 10, it is excellent in simplicity.

[0021] On the first end portion 21 side of the first side portion 23, a plurality of circular first insertion holes 51 are formed at intervals in the longitudinal direction Y. Also, on the second end portion 22 side of the second side portion 24, a plurality of circular second insertion holes 52 are formed at intervals in the longitudinal direction Y.

[0022] As shown in Figure 2, the track rail 5, which is placed on the rail support 10, is restricted from moving in the vertical direction Y by a metal movement restricting pin 8 that is removably inserted into the first and second insertion holes 51 and 52 of the first and second side portions 23 and 24.

[0023] By forming multiple first and second through holes 51 and 52 in the first and second side portions 23 and 24, it is possible to accommodate track rails 5 of various widths, and multiple track rails 5 can also be placed on top of each other.

[0024] Regarding the dimensions of the rail support base 10, the width W1 is 15-25 cm, the length L1 is 50-70 cm, the height H1 is 18-24 cm, the height H2 of the legs is 15-18 cm, and the separation dimension R1 between the first and second insertion holes (the separation distance in the vertical direction Y from center to center of adjacent insertion holes) is 2-4 cm.

[0025] Referring to Figures 5(A) and (B), the rail support portion 40 has a roughly triangular cross-section and includes first and second inclined surfaces 41 and 42 that extend upward so as they approach each other and intersect at the apex 40a, and a hollow portion 43 defined between them. The ends of the rail support portion 40 are open ends 40b and 40c (see Figure 3).

[0026] The height dimension H3 of the rail support section 40, that is, the length dimension in the thickness direction Z from the top surface (base surface T) of the first and second ends 21, 22 and the central cross section 25 to the apex, is approximately 2.8 cm. The respective length dimensions L2 of the first inclined surface 41 and the second inclined surface 42 are approximately 4 cm. The maximum distance W2 between the first inclined surface 41 and the second inclined surface 42 in the lateral direction X is approximately 5.2 cm. The angle α between the base surface T and the first inclined surface 41 / second inclined surface 42 is approximately 45 degrees. Furthermore, the angle β between the first inclined surface 41 and the second inclined surface 42 is approximately 90 degrees.

[0027] The rail support section 40 has dimensions that allow it to be attached, thereby ensuring the clearance distance between the track rail 5 and the base surface T as stipulated in the Law Concerning Technical Standards for Railways. Specifically, in order to set the height dimension H2 that satisfies the standard to approximately 2.8 cm and to stably support the weight of the track rail, the angle α must be approximately 45 degrees, the angle β must be 90 degrees, the maximum clearance dimension W2 must be approximately 5.2 cm, and the respective length dimensions L2 of the first inclined surface 41 and the second inclined surface 42 must be approximately 4 cm.

[0028] Since the rail support portion 40 has a roughly triangular cross-section and makes line contact with the track rail 5, when the track rail 5 is left at high temperatures for a long time and undergoes thermal expansion, the force that causes the track rail 5 to expand can be dispersed compared to when there is surface contact, thereby preventing the track rail 5 from coming off the rail support base 10.

[0029] Furthermore, the rail support portion 40 has a hollow portion 43, which helps to reduce weight. In addition, because both ends of the rail support portion 40 are open ends 40b and 40c, outside air can enter the hollow portion 43, preventing the rail support portion 40 itself from overheating and deforming due to thermal expansion.

[0030] The rail support base 10 is made of metal, such as iron, stainless steel, or aluminum. Alternatively, the rail support base 10 can be constructed from iron square pipes for its constituent parts, namely the first and second end portions 21, 22, the first and second side portions 23, 24, the rail support portion 40, and the leg portion 30. In such cases, the rail support base can be manufactured by using leftover square pipes that have been used for other purposes and joining them together by welding, thereby reducing manufacturing costs.

[0031] As shown in Figure 6, multiple track rails 5 can be placed on the rail support 10. Specifically, the track rails 5 can be safely placed between a pair of movement-restricting pins 8 inserted through the first insertion hole 51 and between a pair of movement-restricting pins 8 inserted through the second insertion hole 52.

[0032] Unless otherwise specified, any of the constituent materials of the rail support base 10 according to the present invention may be any known material commonly used in this type of field, without limitation.

[0033] The present invention described above may include at least the following embodiments. These embodiments may be adopted separately or in combination with each other. [Explanation of Symbols]

[0034] 5. Rails for track 8 Movement restriction pins 10 Rail support 20 cradle body 21 First end 22 Second end 23 First side 24 Second side 30 Legs 40 Rail support section 40a Vertex 40b,40c open end 41 1st slope 42 Second slope 43 Hollow part 51 First insertion hole (insertion hole) 52 Second insertion hole (insertion hole) X horizontal direction Y (vertical direction) Z-axis thickness direction (vertical direction)

Claims

1. A rail support for temporarily placing track rails, having both a vertical and a horizontal orientation, It comprises a metal support body and multiple legs extending downward from the support body, The support body has first and second ends extending in the lateral direction, first and second side portions extending in the vertical direction, spaced apart from each other in the lateral direction, and a rail support portion that extends in the vertical direction and is located between the two side portions in the lateral direction, on which the track rail is placed. The rail support portion is characterized by having a substantially triangular cross-section, a vertex, first and second inclined surfaces that extend upward so as they approach each other and intersect at the vertex, and a hollow portion defined between the first and second inclined surfaces.

2. The rail support according to claim 1, further comprising a movement restricting pin for restricting the vertical movement of the track rail, wherein a plurality of insertion holes for inserting the movement restricting pin are arranged at a distance from each other in the vertical direction on the first end side of the first side and the second end side of the second side.

3. The rail support base according to claim 1 or 2, wherein both ends of the rail support portion are open ends.

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