Rail bearer

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 track when replacing the track rail. [Background technology]

[0002] Conventionally, when replacing track rails, new track rails are sometimes temporarily placed beside the tracks (main line) in advance. It is known that worn sleepers are placed every few meters, and new track rails are transported by vehicle and lowered onto these for temporary placement.

[0003] Patent Document 1 also discloses a rail stand that includes a base, support pieces erected on both sides of the base, and rollers on which track rails are placed that are pivotally attached to the support pieces so as to be freely rotatable. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-55902 A Summary of the Invention [Problem to be solved by the invention]

[0005] The rail support disclosed in Patent Document 1 can temporarily support a guide for moving a rail along the direction in which sleepers are arranged and a track rail.

[0006] However, when such a rail support is used, for example, when the track rail is placed on the rail support under the scorching sun of midsummer in order to replace a new track rail at night, the track rail may thermally expand at high temperatures, causing the rollers to rotate and coming off the rail support.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an improvement over the prior art, which is a rail support on which a track rail can be stably placed even if the track rail expands due to high temperature. [Means for solving the problem]

[0008] SUMMARY OF THE DISCLOSURE In order to solve the technical problem, the present invention relates to a rail support for temporarily placing a track rail, which has a longitudinal direction and a lateral direction.

[0009] The rail support of the present invention comprises a metal support body and a plurality of legs extending downward from the support body, the support body having first and second ends extending in a horizontal direction, first and second side portions extending in the vertical direction and spaced apart from each other in the horizontal direction, and a rail support portion on which the track rail is placed, the rail support portion being located between the both side portions in the horizontal direction and extending in the vertical direction, the rail support portion having a generally triangular cross section and having an apex, first and second inclined surfaces which extend closer to each other as they extend upward and intersect at the apex, 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 restriction pin for restricting movement in the vertical direction, and a plurality of insertion holes for inserting the movement restriction pin are arranged at intervals from each other in the vertical direction on the first end side of the first side portion and the second end side of the second side portion. (2) Both ends of the rail support portion are open. Effect of the Invention

[0011] According to one or more embodiments of the rail support base of the present invention, the rail support portion on which the track rail is placed has a substantially triangular cross section, and is in line contact with the track rail. Even if the track rail is thermally expanded, the force due to the thermal expansion can be dispersed, and displacement of the track rail can be suppressed. [Brief description of the drawings]

[0012] The drawings show specific embodiments of the invention according to the present disclosure, including essential features of the invention as well as alternative and preferred embodiments. [Figure 1] FIG. 4 is a diagram showing an arrangement of a rail support according to the present invention. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] Side view of the rail support. [Diagram 5] (A) A cross-sectional view taken along line V(A)-V(A) in Figure 2. (B) An enlarged view of the area enclosed by V(B) in Figure 5(A). [Figure 6] FIG. 3 is a view similar to FIG. 2 in an example of an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The rail support 10 according to the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments include essential features of the present invention, as well as features that can be selectively adopted and features that can be appropriately combined.

[0014] As shown in FIG. 1, the rail support 10 according to the present invention is arranged in a line in a required number at an appropriate position beside a railway track 1, and is used for temporarily placing new track rails 5 to replace existing track rails 4 on sleepers 3 of the railway track 1.

[0015] 2 to 4, the rail support 10 is a metal frame having a vertical direction Y, a horizontal direction X, and a thickness direction (up and down direction) Z that intersect with each other, and has a support main body 20 and a number of legs 30 extending downward from the support main body 20.

[0016] The receiving base body 20 is rectangular and has first and second end portions 21, 22 positioned opposite each other in the vertical direction Y and extending in the horizontal direction X, first and second side portions 23, 24 positioned opposite each other and spaced apart in the horizontal direction X and extending in the vertical direction, and a central transverse portion 25 extending in the horizontal direction X between the first and second end portions 21, 22.

[0017] The receiving base body 20 further includes a rail support portion 40 located between the side portions 23, 24 in the horizontal direction X, extending in the vertical direction Y so as to traverse the central cross portion 25, and having a generally triangular cross section with a vertex 40a.

[0018] A pair of legs 30 are provided extending downward from the lower surfaces of the first and second ends 21, 22, and the tips (stakes) 31 of the legs 30 are sharpened.

[0019] When placing the rail support 10 beside the track 1, a worker removes some of the ballast on the track bed if necessary, and while checking the height of the rail support 10 with a construction gauge ruler, hammers in the four corners of the rail support 10 with a tool and inserts the sharp tips 31 of the legs 30 into the track bed. The height of the rail support 10 is checked again with the construction gauge ruler to complete the installation.

[0020] After the work is completed, the worker can easily remove the rail support 10 by pulling the tip 31 of the leg 30. In this way, since no separate stakes or the like are required for laying and removing the rail support 10, it is very simple and convenient.

[0021] A plurality of circular first through-holes 51 are formed on the first end 21 side of the first side portion 23 and spaced apart from each other in the vertical direction Y. A plurality of circular second through-holes 52 are formed on the second end 22 side of the second side portion 24 and spaced apart from each other in the vertical direction Y.

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

[0023] Since a plurality of first and second insertion holes 51, 52 are formed in the first and second side portions 23, 24, it is possible to accommodate track rails 5 having various width dimensions, and also possible to place a plurality of track rails 5 on the track rails 5.

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

[0025] 5(A) and (B), the rail support part 40 has a generally triangular cross section, and has first and second inclined surfaces 41, 42 that extend toward each other and intersect at a vertex 40a as they approach each other upward, and a hollow part 43 defined therebetween. In addition, both ends of the rail support part 40 are open ends 40b, 40c (see FIG. 3).

[0026] The height dimension H3 of the rail support portion 40, i.e., 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 about 2.8 cm, the length dimension L2 of each of the first inclined surface 41 and the second inclined surface 42 is about 4 cm, and the maximum separation dimension W2 in the horizontal direction X between the first inclined surface 41 and the second inclined surface 42 is about 5.2 cm. The angle α between the base surface T and the first inclined surface 41 / second inclined surface 42 is about 45 degrees. Furthermore, the angle β between the first inclined surface 41 and the second inclined surface 42 is about 90 degrees.

[0027] By having the rail support part 40 have such dimensions, it is possible to ensure the separation distance between the track rail 5 and the base surface T, as stipulated in the Law Concerning Technical Standards for Railways. That is, in order to set the height dimension H2 that satisfies the standards to about 2.8 cm and stably support the weight of the track rail, it is necessary that the angle α is about 45 degrees, the angle β is 90 degrees, the maximum separation dimension W2 is about 5.2 cm, and the length dimension L2 of each of the first inclined surface 41 and the second inclined surface 42 is about 4 cm.

[0028] Since the rail support part 40 has a substantially triangular cross section and is in line contact with the track rail 5, when the track rail 5 is left at high temperatures for a long period of time and thermally expands, the force of the track rail 5 tending to expand can be dispersed more effectively than in the case of surface contact, and the track rail 5 can be prevented from coming off the rail support base 10.

[0029] In addition, weight reduction can be achieved by having the rail support part 40 have the hollow part 43. Furthermore, by having both ends 40b, 40c of the rail support part 40, it is possible to suppress deformation due to thermal expansion caused by the rail support part 40 itself becoming overheated due to outside air entering the hollow part 43.

[0030] The rail support 10 is made of metal, such as iron, stainless steel, aluminum, etc. The components of the rail support 10, i.e., the first and second end portions 21, 22, the first and second side portions 23, 24, the rail support portion 40, and the legs 30, can also be made of iron square pipes. In such a case, the rail support can be manufactured by using the remains of square pipes used for other purposes and joining them together by welding, thereby reducing manufacturing costs.

[0031] 6, a plurality of track rails 5 can be placed on the rail support 10. Specifically, the track rails 5 can be safely placed between the pair of movement restriction pins 8 inserted into the first insertion holes 51 and between the pair of movement restriction pins 8 inserted into the second insertion holes 52.

[0032] Unless otherwise specified, various known materials that are commonly used in this type of field can be used without restriction as the constituent materials of the rail support 10 of the present invention.

[0033] The present invention can include at least the following embodiments, which can be adopted separately or in combination with each other. [Explanation of symbols]

[0034] 5 Track rails 8 Movement restriction pin 10 Rail support 20 cradle body 21 First end 22 Second end 23 First side 24 Second Side 30 Legs 40 Rail support 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 Y Vertical Z thickness direction (vertical direction)

Claims

1. A rail support for temporarily placing a track rail, the rail support having a vertical direction and a horizontal direction, The device includes a metal base body and a plurality of legs extending downward from the base body. the support body has first and second end portions extending in a horizontal direction, first and second side portions extending in the vertical direction and spaced apart from each other in the horizontal direction, and a rail support portion located between the both side portions in the horizontal direction and extending in the vertical direction, on which the track rail is placed; The rail support base is characterized in that the rail support portion has an approximately triangular cross-section, has a vertex, first and second inclined surfaces that extend upwardly toward each other and intersect at the vertex, and a hollow portion defined between the first and second inclined surfaces.

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

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

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