Rail fastening device

Abstract

To provide a rail fastening device which simultaneously performs track gauge adjustment and height adjustment with a small number of components.SOLUTION: A rail fastening device 1 has a tie plate 4 and a pressing part 5 for pressing a rail 3 placed on the tie plate 4, the tie plate 4 includes a placing part on which the rail 3 is placed and a projecting part 8 projecting upward from the placing part, and the pressing part 5 includes a washer member 12, the projecting part 8 includes a side surface SS1 on the rail 3 side in the direction DR1, and the washer member 12 includes a side surface SS2 on the opposite side to the rail 3 side in the direction DR1. The side surface SS1 is inclined with respect to the surface PL1 perpendicular to the direction DR1 such that the front end EP1 in the direction DR3 of the side surface SS1 is located more toward the rail 3 in the direction DR1 than the rear end EP2 in the direction DR3 of the side surface SS1, and the upper-end EP3 of the side surface SS1 is located more toward the opposite side of the rail 3 in the direction DR1 than the lower end EP4 of the side surface SS1.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a rail fastening device that fastens a rail to a support body that supports the rail. [Background technology]

[0002] For example, a rail fastening device that fastens a rail to a support such as a sleeper includes a tie plate that is fixed to the support and has a rail placed on its upper surface, and a pressing part that presses the rail placed on the upper surface of the tie plate against the upper surface of the tie plate to fasten it. Alternatively, a rail fastening device includes a pair of lateral pressure receiving fittings that are fixed to the support, and a pressing part that presses the rail placed on the upper surface of the bed plate between the pair of lateral pressure receiving fittings against the upper surface of the bed plate to fasten it.

[0003] JP 2020-16010 A (Patent Document 1) discloses a technology for a fastening device for a rail expansion joint, which comprises a pair of lateral pressure receiving fittings fixed by anchor bolts via an adjustment plate on a sleeper, a floor plate to which at least one of a support rail and a tongue rail is fixed which is placed on the adjustment plate between the lateral pressure receiving fittings via a track pad, and an elastic pressing means which elastically presses the floor plate onto the track pad. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-16010 A Summary of the Invention [Problem to be solved by the invention]

[0005] Consider a case where a rail is adjusted in height using a rail fastening device having a structure in which a tie plate or the like is fixed to a support such as a sleeper by means of a screw nail for a rail. In such a case, the conventional rail fastening device can adjust the gauge by shifting the position of the rail in the width direction of the rail, but cannot adjust the height by shifting the position of the rail in the vertical direction. Therefore, in order to adjust the height using the conventional rail fastening device, it is necessary to insert an adjustment plate for adjusting the height under both the rail and the washer member included in the pressing part, which increases the number of parts. In other words, the conventional rail fastening device has a problem in that it cannot adjust the gauge and the height simultaneously with a small number of parts.

[0006] The present invention has been made to solve the problems of the prior art as described above, and has an object to provide a rail fastening device that fastens a rail to a support, which does not require the insertion of an adjustment plate for height adjustment under a washer member included in a pressing part, and can perform gauge adjustment and height adjustment simultaneously with a small number of parts. [Means for solving the problem]

[0007] Among the inventions disclosed in this application, a brief summary of representative inventions is as follows.

[0008] A rail fastening device as one aspect of the present invention is a rail fastening device that fastens a rail to a support body that supports the rail. The rail fastening device has a tie plate that is fixed to the support body and includes a first upper surface on which a rail is placed, and a first pressing portion that presses the rail placed on the first upper surface of the tie plate against the first upper surface of the tie plate to fasten the rail. The tie plate includes a placement portion that includes the first upper surface and on which the rail is placed, a first protruding portion that is disposed on a first side in a first direction that is the width direction of the rail from the placement portion and protrudes upward beyond the first upper surface of the placement portion, and a first through hole portion that is disposed between the placement portion and the first protruding portion and has a first through hole formed therein that penetrates in a second direction that is the up-down direction. The first pressing portion has a second through hole penetrating in the second direction and includes a first washer member for pressing the rail, a first male threaded portion insertable into the first through hole and the second through hole, and a first female threaded portion screwable into the first male threaded portion. When the second through hole overlaps with the first through hole in a plan view and the first male threaded portion is disposed in the first through hole and the second through hole, the first threaded portion, which is one of the first male threaded portion and the first female threaded portion, screws into the second threaded portion, which is the other. The first protrusion includes a first side surface opposite to the first side in the first direction, and the first washer member includes a second side surface on the first side in the first direction. The first side surface is inclined with respect to a first plane perpendicular to the first direction such that a first end of the first side on a second side in a third direction, which is the length direction of the rail, is located closer to the first side in the first direction than a second end of the first side opposite the second side in the third direction, and a third end of an upper side of the first side surface is located closer to the first side in the first direction than a fourth end of a lower side of the first side surface. The second side surface is inclined with respect to the first plane such that a fifth end of the second side in the third direction of the second side surface is located closer to the first side in the first direction than a sixth end of the second side surface opposite the second side in the third direction, and a seventh end of the upper side of the second side surface is located closer to the first side in the first direction than an eighth end of a lower side of the second side surface.The first pressing portion presses the rail against the first upper surface of the mounting portion and fastens it by screwing the first threaded portion into the second threaded portion with the second side surface of the first washer member in contact with the first side surface of the first protrusion, the second through hole overlapping the first through hole in a planar view, and the first male threaded portion being disposed in the first through hole and the second through hole.

[0009] In another aspect, the first washer member may include a first lower surface and a first cutout formed on a first edge of the first lower surface opposite to the first side in the first direction, extending in a third direction, and engaging with a second edge of the bottom of the rail on the first side in the first direction. The position of the first washer member in the third direction may be adjusted according to the position of the rail in the first and second directions so that the first cutout engages with the second edge and the second side contacts the first side.

[0010] In another aspect, the rail may be placed on the first upper surface of the mounting portion via an adjustment plate that adjusts the distance between the first upper surface and the rail, and the lower surface of the first washer member may be separated from the first through hole portion.

[0011] In another embodiment, the first width of the first cutout portion in the first direction may be equal at any position in the third direction, and the first depth of the first cutout portion in the second direction may be equal at any position in the third direction.

[0012] In another aspect, the tie plate may include a second upper surface, be positioned on the first side in the first direction from the first protrusion, and include a fixing portion fixed to the support, and the first protrusion may protrude above the second upper surface of the fixing portion.

[0013] In another embodiment, the first pressing portion may include a first bolt including a first male threaded portion and a first head, the first female threaded portion may be a first nut, the first threaded portion may be a first nut, and the second threaded portion may be a first male threaded portion. The first nut may be screwed into the first male threaded portion included in the first bolt in a state where the second through hole overlaps with the first through hole in a plan view, the first male threaded portion is inserted into the second through hole, and the first head is engaged with the first through hole. The first pressing portion may press the rail against the first upper surface of the mounting portion to fasten the rail by screwing the first nut into the first male threaded portion included in the first bolt in a state where the second through hole overlaps with the first through hole in a plan view, the first male threaded portion is inserted into the second through hole, and the first head is engaged with the first through hole.

[0014] In another aspect, the rail fastening device may have a second pressing portion that presses the rail placed on the first upper surface of the tie plate against the first upper surface of the tie plate to fasten the rail. The tie plate may include a second protruding portion that is disposed on the opposite side to the first side in the first direction from the mounting portion and protrudes upward from the first upper surface of the mounting portion, and a second through hole portion that is disposed between the mounting portion and the second protruding portion and has a third through hole that penetrates in the second direction. The second pressing portion may include a second washer member that has a fourth through hole that penetrates in the second direction and is used to press the rail, a second male threaded portion that can be inserted into the third through hole and the fourth through hole, and a second female threaded portion that can be screwed into the second male threaded portion. In a state where the fourth through hole overlaps with the third through hole in a plan view and the second male threaded portion is disposed in the third through hole and the fourth through hole, the third threaded portion, which is either the second male threaded portion or the second female threaded portion, may be screwed into the fourth threaded portion, which is the other of the second male threaded portion and the second female threaded portion. The second protruding portion may include a third side surface on a first side in the first direction, and the second washer member may include a fourth side surface opposite to the first side in the first direction. The third side surface may be inclined with respect to the first surface such that a ninth end portion on a second side in the third direction of the third side surface is located closer to the first side in the first direction than a tenth end portion on a second side in the third direction of the third side surface, and an eleventh end portion on an upper side of the third side surface is located closer to the first side in the first direction than a twelfth end portion on a lower side of the third side surface. The fourth side surface may be inclined with respect to the first surface such that a 13th end of a second side in the third direction of the fourth side surface is located closer to the first side in the first direction than a 14th end of the fourth side surface opposite the second side in the third direction, and a 15th end of an upper side of the fourth side surface is located closer to the first side in the first direction than a 16th end of a lower side of the fourth side surface. The second pressing portion may press and fasten the rail against the first upper surface of the mounting portion by screwing the third threaded portion into the fourth threaded portion with the fourth side surface of the second washer member in contact with the third side surface of the second protruding portion, the fourth through hole overlaps with the third through hole in a plan view, and the second male threaded portion is disposed in the third through hole and the fourth through hole.

[0015] In another aspect, the second washer member may include a second lower surface, and a second cutout formed on a third edge of the second lower surface on a first side in the first direction, extending in the third direction, and engaging with a fourth edge of the bottom of the rail on a side opposite to the first side in the first direction. The position of the second washer member in the third direction may be adjusted according to the position of the rail in the first and second directions so that the second cutout engages with the fourth edge and the fourth side contacts the third side. Effect of the Invention

[0016] By applying one aspect of the present invention, in a rail fastening device that fastens a rail to a support body, there is no need to insert an adjustment plate for height adjustment under the washer member included in the pressing portion, and gauge adjustment and height adjustment can be performed simultaneously with a small number of parts. [Brief description of the drawings]

[0017] [Figure 1] 1 is a perspective view showing a rail fastening device according to an embodiment; [Diagram 2] FIG. 1 is a plan view showing a rail fastening device according to an embodiment. [Diagram 3] 1 is a cross-sectional view showing a rail fastening device according to an embodiment. [Figure 4] FIG. 2 is a perspective view showing a tie plate in the rail fastening device according to the embodiment. [Diagram 5] FIG. 2 is a plan view showing a tie plate in the rail fastening device according to the embodiment. [Figure 6] FIG. 2 is a cross-sectional view showing a tie plate in the rail fastening device of the embodiment. [Figure 7] FIG. 4 is a plan view showing a washer member in the rail fastening device according to the embodiment. [Figure 8] 4 is a cross-sectional view showing a washer member in the rail fastening device of the embodiment. FIG. [Figure 9] FIG. 11 is a plan view showing a rail fastening device of a comparative example. [Figure 10] FIG. 4 is a cross-sectional view showing a rail fastening device of a comparative example. [Figure 11] FIG. 2 is a plan view showing a state in which gauge adjustment has been performed using the rail fastening device of the embodiment. [Figure 12] FIG. 11 is a plan view showing a state in which height adjustment has been performed using the rail fastening device of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0019] The disclosure is merely an example, and those who are skilled in the art can easily come up with appropriate modifications that maintain the gist of the invention, and naturally, these modifications are included in the scope of the present invention. In addition, in order to make the explanation clearer, the drawings may show the width, thickness, shape, etc. of each part in a schematic manner compared to the embodiment, but these are merely examples and do not limit the interpretation of the present invention.

[0020] In addition, in this specification and each figure, elements similar to those described above with respect to the previous figures are given the same reference numerals, and detailed descriptions may be omitted as appropriate.

[0021] Furthermore, in the drawings used in the embodiments, hatching (shading) may be omitted even in cross-sectional views in order to make the drawings easier to see, and hatching may be added even in plan views in order to make the drawings easier to see.

[0022] In the following embodiments, when a range is indicated as A to B, it means A or more and B or less, unless otherwise specified.

[0023] (Embodiment) <Rail fastening device> A rail fastening device according to an embodiment of the present invention will be described in comparison with a rail fastening device of a comparative example.

[0024] Fig. 1 is a perspective view showing a rail fastening device of an embodiment. Fig. 2 is a plan view showing the rail fastening device of an embodiment. Fig. 3 is a cross-sectional view showing the rail fastening device of an embodiment. Fig. 3 shows a cross section taken along line AA in Fig. 2.

[0025] Fig. 4 is a perspective view showing a tie plate in the rail fastening device of the embodiment. Fig. 5 is a plan view showing a tie plate in the rail fastening device of the embodiment. Fig. 6 is a cross-sectional view showing a tie plate in the rail fastening device of the embodiment. Fig. 6 shows a cross section taken along line AA in Fig. 2.

[0026] Fig. 7 is a plan view showing a washer member in a rail fastening device of an embodiment. Fig. 8 is a cross-sectional view showing a washer member in a rail fastening device of an embodiment. Figs. 7(a) and 8(a) show a washer member arranged to the left of the rail in Fig. 2, and Figs. 7(b) and 8(b) show a washer member arranged to the right of the rail in Fig. 2. Figs. 8(a) and 8(b) show a cross-section taken along line AA in Fig. 2.

[0027] Fig. 9 is a plan view showing a rail fastening device of a comparative example, Fig. 10 is a cross-sectional view showing a rail fastening device of a comparative example, Fig. 10 shows a cross section taken along line BB in Fig. 9.

[0028] Fig. 11 is a plan view showing a state where gauge adjustment has been performed using the rail fastening device of the embodiment. Fig. 12 is a plan view showing a state where height adjustment has been performed using the rail fastening device of the embodiment.

[0029] As shown in Figs. 1 to 8, a rail fastening device 1 of this embodiment is a rail fastening device that fastens a rail 3 to a support 2 that supports the rail. The rail 3 is a member that supports and guides the wheels of a railway vehicle to allow the railway vehicle to run. The rail 3 includes a head 3a that contacts the wheels of the railway vehicle, a bottom 3b, and a web 3c that connects the head 3a and the bottom 3b. The support 2 is a member that supports the rail 3. For example, an existing sleeper such as a prestressed concrete (PC) sleeper can be used as the support 2.

[0030] The rail fastening device 1 of this embodiment has a tie plate 4 and a pressing portion (first pressing portion) 5. The tie plate 4 is fixed to the support 2 by, for example, a rail screw 6 and includes an upper surface (first upper surface) 4a, on which the rail 3 is placed. The pressing portion 5 presses the rail 3 placed on the upper surface 4a of the tie plate 4 against the upper surface 4a of the tie plate 4 to fasten the rail 3. Note that as long as the tie plate 4 is fixed to the support 2, the method of fixing the tie plate 4 to the support 2 does not have to be a method using a rail screw 6 and is not particularly limited.

[0031] The tie plate 4 includes a mounting portion 7, a protruding portion (first protruding portion) 8, and a through hole portion (first through hole portion) 9. The mounting portion 7 includes an upper surface 4a, and the rail 3 is mounted on the upper surface 4a. The protruding portion 8 is disposed on one side (first side) in a direction (first direction) DR1 that is the width direction of the rail 3 mounted on the upper surface 4a of the mounting portion 7, and protrudes upward from the upper surface 4a of the mounting portion 7. The through hole portion 9 is disposed between the mounting portion 7 and the protruding portion 8, and has a through hole (first through hole) 11 that penetrates in a direction (second direction) DR2 that is the up-down direction.

[0032] The pressing portion 5 includes a washer member (first washer member) 12, a male thread portion (first male thread portion) 13, and a female thread portion (first female thread portion) 14. The washer member 12 is formed with a through hole (second through hole) 15 penetrating in the direction DR2, and is for pressing the rail 3 placed on the upper surface 4a of the placement portion 7. The male thread portion 13 can be inserted into the through hole 11 and the through hole 15. The female thread portion 14 can be screwed into the male thread portion 13. With the through hole 15 overlapping the through hole 11 in a plan view and the male thread portion 13 being disposed in the through hole 11 and the through hole 15, the first thread portion, which is either the male thread portion 13 or the female thread portion 14, is screwed into the second thread portion, which is the other.

[0033] As described below, the pressing portion 5 includes a bolt (first bolt) 17 including a male threaded portion 13 and a head (first head) 16, and the female threaded portion 14 is a nut (first nut) 18, and the nut 18 is screwed into the male threaded portion 13 with the head 16 engaged in the through hole 11. However, it is sufficient that the first threaded portion, which is either the male threaded portion 13 or the female threaded portion 14, is screwed into the second threaded portion, which is the other, and the female threaded portion 14 may be formed in the through hole 11, and the male threaded portion 13 may be screwed into the female threaded portion 14 formed in the through hole 11.

[0034] The protrusion 8 includes a side surface (first side surface) SS1 on the rail 3 side (opposite the first side) in the direction DR1. The washer member 12 includes a side surface (second side surface) SS2 on the opposite side (first side) to the rail 3 side in the direction DR1.

[0035] The side SS1 is inclined with respect to a plane (first surface) PL1 perpendicular to the direction DR1 so that a front (second side) end (first end, edge) EP1 of the side SS1 in a direction (third direction) DR3 which is the longitudinal direction of the rail 3 is positioned closer to the rail 3 side in the direction DR1 (opposite the first side) than a rear (opposite the second side) end (second end, edge) EP2 of the side SS1 in the direction DR3, and so that an upper end (third end, edge) EP3 of the side SS1 in the direction DR2 is positioned closer to the rail 3 side in the direction DR1 (on the first side) than a lower end (fourth end, edge) EP4 of the side SS1 in the direction DR2.

[0036] In addition, side SS2 is inclined with respect to plane PL1 so that the front (second side) end (fifth end, edge) EP5 of side SS2 in direction DR3 is located closer to the rail 3 in direction DR1 (opposite the first side) than the rear (opposite the second side) end (sixth end, edge) EP6 of side SS2 in direction DR3, and the upper end (seventh end, edge) EP7 of side SS2 in direction DR2 is located closer to the rail 3 in direction DR1 (first side) than the lower end (eighth end, edge) EP8 of side SS2 in direction DR2.

[0037] The pressing portion 5 presses the rail 3 against the upper surface 4a of the support portion 7 and fastens it in place with the side surface SS2 of the washer member 12 in contact with the side surface SS1 of the protrusion 8, the washer member 12 being positioned on the through hole portion 9 and the bottom 3b of the rail 3 so as to straddle the portion of the tie plate 4 between the protrusion 8 and the rail 3, the through hole 15 overlapping with the through hole 11 in a planar view, and the male threaded portion 13 being positioned in the through hole 11 and the through hole 15, and the first threaded portion screws into the second threaded portion.

[0038] 9 and 10, the rail fastening device 101 of the comparative example also has a tie plate 104 and a pressing portion 105, similar to the rail fastening device 1 of the embodiment, and the tie plate 104 is fixed to the support 2 by, for example, a rail screw 106 and includes an upper surface 104a, and the rail 3 is placed on the upper surface 104a. Also, in the rail fastening device 101 of the comparative example, similar to the rail fastening device 1 of the embodiment, the tie plate 104 includes a placement portion 107 and a through-hole portion 109, in which a through hole 111 is formed, and the pressing portion 105 includes a washer member 112, a male thread portion 113, and a female thread portion 114.

[0039] On the other hand, in the rail fastening device 101 of the comparative example, unlike the rail fastening device 1 of the embodiment, the washer member 112 includes a lower surface portion 112a and a protruding portion PR91 formed by an edge portion PP91 on the side (first side) of the lower surface portion 112a opposite the rail 3 side in the direction DR1 protruding downward from the lower surface of the portion of the lower surface portion 112a other than the edge portion PP91, and the tie plate 104 includes a groove portion GR1 that engages with the protruding portion PR91 instead of the protruding portion 8 (see FIG. 2). The groove portion GR1 includes a side surface SS91 on the side (first side) opposite the rail 3 side in the direction DR1, and the washer member 112 includes a side surface SS92 on the side (first side) opposite the rail 3 side in the direction DR1.

[0040] Side SS91 is inclined with respect to a plane PL1 perpendicular to the direction DR1 so that a front (second side) end EP91 of side SS91 in direction DR3 is positioned closer to the rail 3 side in direction DR1 (opposite the first side) than a rear (opposite the second side) end EP92 of side SS91 in direction DR3, but is not inclined with respect to a plane PL1 perpendicular to the direction DR1 so that an upper end of side SS91 is positioned closer to the rail 3 side in direction DR1 (on the first side) than a lower end of side SS91.

[0041] Side SS92 is inclined with respect to a plane PL1 perpendicular to direction DR1 so that an end EP93 on the front (second side) of side SS92 in direction DR3 is positioned closer to the rail 3 side in direction DR1 (opposite the first side) than an end EP94 on the rear (opposite the second side) of side SS92 in direction DR3, but is not inclined with respect to plane PL1 so that an upper end EP95 of side SS92 is positioned closer to the rail 3 side in direction DR1 (on the first side) than a lower end EP96 of side SS92.

[0042] Consider a case where the height of a rail is adjusted using the rail fastening device 101 of the comparative example as a rail fastening device having a structure for fixing a tie plate or the like to a support such as a sleeper by, for example, a screw nail for a rail. In such a case, for example, the side surface SS91 is inclined with respect to a plane PL1 perpendicular to the direction DR1 so that an end EP91 on the front side (second side) in the direction DR3 of the side surface SS91 is located closer to the rail 3 side in the direction DR1 (opposite side to the first side) than an end EP92 on the rear side (opposite side to the second side) in the direction DR3 of the side surface SS91. Therefore, although it is possible to perform a gauge adjustment by shifting the position of the rail 3 in the width direction of the rail 3, it is not possible to perform a height adjustment by shifting the position of the rail 3 in the vertical direction. Therefore, in order to perform a height adjustment using the rail fastening device 101 of the comparative example, it is necessary to insert an adjustment plate (adjustment plate 119) or the like for performing the height adjustment under both the rail 3 and the washer member 112 included in the pressing part 105, which causes a problem of a large number of parts. That is, the rail fastening device 101 of the comparative example had a problem in that it was not possible to simultaneously perform gauge adjustment and elevation adjustment with a small number of parts.

[0043] On the other hand, the rail fastening device 1 of the present embodiment differs from the rail fastening device 101 of the comparative example in that the washer member 12 does not include a protruding portion PR91 (see FIG. 10) and the tie plate 4 includes a protruding portion 8.

[0044] Side SS1 is inclined with respect to a plane PL1 perpendicular to direction DR1 so that not only is a front (second side) end EP1 of side SS1 in direction DR3 positioned closer to the rail 3 in direction DR1 (opposite the first side) than a rear (opposite the second side) end EP2 of side SS1 in direction DR3, but also an upper end EP3 of side SS1 is positioned closer to the rail 3 in direction DR1 (on the first side) than a lower end EP4 of side SS1.

[0045] In addition, side SS2 is inclined with respect to plane PL1 not only so that a front (second side) end EP5 of side SS2 in direction DR3 is located closer to the rail 3 in direction DR1 (opposite the first side) than a rear (opposite the second side) end EP6 of side SS2 in direction DR3, but also so that an upper end EP7 of side SS2 is located closer to the rail 3 in direction DR1 (first side) than a lower end EP8 of side SS2.

[0046] As a result, the position of the washer member 12 in the direction DR2 (vertical direction) is adjusted according to the position of the rail 3 in the direction DR1 and the direction DR2 so that the side surface SS2 contacts the side surface SS1, without inserting an adjustment plate between the washer member 12 and the through-hole portion 9. That is, a gauge adjustment can be performed by shifting the position of the rail 3 in the width direction of the rail 3, and a height adjustment can be performed by shifting the position of the rail 3 in the vertical direction. Therefore, there is no need to insert an adjustment plate under the washer member 12 included in the pressing portion 5 to perform the height adjustment, and the number of parts can be reduced. That is, in the rail fastening device 1 of this embodiment, the gauge adjustment and the height adjustment can be performed simultaneously with a small number of parts.

[0047] That is, the rail fastening device 1 of this embodiment can adjust the height of the rail 3 and the washer member 12, and can adjust the gauge of the rail 3 and the washer member 12 without using an adjustment plate. Specifically, the side surface SS1 of the protruding portion 8 of the tie plate 4 and the side surface SS2 of the washer member 12 are each inclined as described above, and the washer member 12 is shifted as desired during gauge adjustment and height adjustment to ensure a target adjustment amount. In other words, the rail fastening device 1 of this embodiment changes the height adjustment method from a method of laying an adjustment plate on both the bottom of the rail 3 and the bottom of the washer member 12 to a method of laying an adjustment plate only on the bottom of the rail 3, thereby reducing the number of parts.

[0048] In the rail fastening device 101 of the comparative example shown in Figs. 9 and 10, when adjusting the height, it is necessary to insert an adjustment plate under each of the rail 3 and the washer member 112, and three adjustment plates, one for the rail and two for the washer members, are required for each height as adjustment plates for adjusting the height, resulting in a large number of parts. On the other hand, in the rail fastening device 1 of the present embodiment shown in Figs. 1 to 8, the protrusions 8 and 28 arranged on both sides of the rail 3 are inclined as described above, so that it is not necessary to insert an adjustment plate under each of the washer members 12, and the number of parts can be reduced. In addition, in the rail fastening device 101 of the comparative example, the gauge adjustment and the height adjustment are performed using separate materials, but in the rail fastening device 1 of the present embodiment, the gauge adjustment and the height adjustment can be performed simultaneously using the same members.

[0049] Preferably, the washer member 12 includes a lower surface (first lower surface) 12a and a notch portion (first notch portion) 12b. The notch portion 12b is formed in an edge portion (first edge portion) PP1 of the lower surface 12a on the rail 3 side (opposite side to the first side) in the direction DR1, extends in the direction DR3, and engages with an edge portion (second edge portion) PP2 of the bottom portion 3b of the rail 3 on the opposite side (first side) to the center side of the rail 3 in the direction DR1. The position of the washer member 12 in the direction DR3 is adjusted according to the position of the rail 3 in the directions DR1 and DR2 so that the notch portion 12b engages with the edge portion PP2 and the side surface SS2 contacts the side surface SS1.

[0050] In this case, with the positional deviation of the edge PP1 of the washer member 12 on the rail 3 side toward the rail 3 side (opposite side to the first side) in the direction DR1 being restricted by the edge PP2 of the bottom 3b of the rail 3, the gauge adjustment for shifting the position of the rail 3 in the width direction of the rail 3 can be easily performed, and the height adjustment for shifting the position of the rail 3 in the vertical direction can be easily performed. Therefore, the height adjustment of the rail 3 can be easily performed, and the gauge adjustment of the rail 3 can be easily performed, without inserting an adjustment plate under the washer member 12.

[0051] Preferably, the rail 3 is placed on the upper surface 4a of the mounting portion 7 via an adjustment plate 19 that adjusts the distance between the upper surface 4a and the rail 3, and the lower surface 12a of the washer member 12 is separated from the through hole portion 9, and no adjustment plate is inserted between the lower surface 12a of the washer member 12 and the through hole portion 9 of the tie plate 4.

[0052] In this case, since no adjustment plate is inserted between the lower surface 12a of the washer member 12 and the through-hole portion 9 of the tie plate 4, the number of parts can be reliably reduced.

[0053] Preferably, the width (first width) WD1 of the cutout portion 12b in the direction DR1 is equal at any position in the direction DR3, and the depth (first depth, height) DP1 of the cutout portion 12b in the direction DR2 is equal at any position in the direction DR3.

[0054] In this case, regardless of the position of the washer member 12 in the direction DR3, the position of the edge portion PP1 of the washer member 12 on the rail 3 side in the direction DR1 becomes equal, and in a state in which the positional deviation of the edge portion PP1 of the washer member 12 on the rail 3 side toward the rail 3 side (the side opposite to the first side) in the direction DR1 is restricted by the edge portion PP2 of the bottom portion 3b of the rail 3, the gauge adjustment for shifting the position of the rail 3 in the width direction of the rail 3 can be made more easily, and the height adjustment for shifting the position of the rail 3 in the vertical direction can be made more easily. Therefore, the height adjustment of the washer member 12 can be made easily without using an adjustment plate, and the gauge adjustment of the washer member 12 can be made easily.

[0055] Preferably, the tie plate 4 includes an upper surface (second upper surface) 4b, and a fixing portion 21 that is arranged on the opposite side (first side) from the rail 3 in the direction DR1 relative to the protruding portion 8 and is fixed to the support body 2. The protruding portion 8 protrudes upward beyond the upper surface 4b of the fixing portion 21. The fixing portion 21 has a through hole 6a for the rail screw 6 formed therein.

[0056] In such a case, the fixing portion 21 of the tie plate 4 can be easily fixed to the support 2 such as a sleeper.

[0057] Preferably, the pressing portion 5 includes a bolt (first bolt) 17 including a male thread portion (first male thread portion) 13 and a head portion (first head portion) 16, and the female thread portion (first female thread portion) 14 is a nut (first nut) 18. The first thread portion is the nut 18, and the second thread portion is the male thread portion 13. The nut 18 is screwed onto the male thread portion 13 included in the bolt 17 with the through hole 15 overlapping the through hole 11 in a plan view, the male thread portion 13 being inserted into the through hole 15, and the head portion 16 being engaged with the through hole 11. In addition, when viewed in a plane, the through hole 15 of the pressing portion 5 overlaps with the through hole 11, the male threaded portion 13 is inserted into the through hole 15, and the head 16 is engaged with the through hole 11. With the nut 18 screwed into the male threaded portion 13 of the bolt 17, the rail 3 is pressed against the upper surface 4a of the support portion 7 to fasten it.

[0058] In this case, since the bolt 17 and the nut 18 can be used as the pressing portion 5, the rail 3 placed on the upper surface 4a of the tie plate 4 can be easily pressed against the upper surface of the tie plate 4 for fastening. As described above, it is sufficient that the first threaded portion, which is either the male threaded portion 13 or the female threaded portion 14, is screwed into the second threaded portion, which is the other, and the female threaded portion 14 may be formed in the through hole 11, and the male threaded portion 13 may be screwed into the female threaded portion 14 formed in the through hole 11.

[0059] Preferably, the rail fastening device 1 of the present embodiment has a pressing portion (second pressing portion) 25. The pressing portion 25 presses the rail 3 placed on the upper surface 4a of the tie plate 4 against the upper surface 4a of the tie plate 4 to fasten the rail 3. The pressing portion 25 is disposed on the opposite side to the pressing portion 5 across the rail 3 in the direction DR1.

[0060] The tie plate 4 includes a protrusion (second protrusion) 28 and a through hole (second through hole) 29. The protrusion 28 is disposed on the opposite side to the protrusion 8 side (opposite side to the first side) of the mounting portion 7 in the direction DR1, and protrudes upward from the upper surface 4a of the mounting portion 7. The through hole 29 is disposed between the mounting portion 7 and the protrusion 28, and has a through hole (third through hole) 31 penetrating in the direction DR2. The protrusion 28 is disposed on the opposite side to the protrusion 8 in the direction DR1 across the rail 3.

[0061] The pressing portion 25 includes a washer member (second washer member) 32, a male thread portion (second male thread portion) 33, and a female thread portion (second female thread portion) 34. The washer member 32 is formed with a through hole (fourth through hole) 35 penetrating in the direction DR2, and is for pressing the rail 3 placed on the upper surface 4a of the placement portion 7. The male thread portion 33 can be inserted into the through hole 31 and the through hole 35. The female thread portion 34 can be screwed into the male thread portion 33. With the through hole 35 overlapping the through hole 31 in a plan view and the male thread portion 33 being disposed in the through hole 31 and the through hole 35, the third thread portion, which is either the male thread portion 33 or the female thread portion 34, is screwed into the fourth thread portion, which is the other.

[0062] The pressing portion 25 includes a bolt (second bolt) 37 including a male threaded portion 33 and a head (second head) 36, and the female threaded portion 34 is a nut (second nut) 38, and the nut 38 is screwed into the male threaded portion 33 with the head 36 engaged in the through hole 31. However, it is only necessary that the third threaded portion, which is either the male threaded portion 33 or the female threaded portion 34, is screwed into the fourth threaded portion, which is the other, and the female threaded portion 34 may be formed in the through hole 31, and the male threaded portion 33 may be screwed into the female threaded portion 34 formed in the through hole 31.

[0063] The protrusion 28 includes a side (third side) SS3 on the rail 3 side (first side) in the direction DR1, and the washer member 32 includes a side (fourth side) SS4 on the opposite side to the rail 3 side (opposite the first side) of the washer member 32 in the direction DR1.

[0064] Side SS3 is inclined with respect to a plane PL1 perpendicular to the direction DR1 so that a front (second side) end (9th end, edge) EP9 of side SS3 in direction DR3 is located on the opposite side to the rail 3 side in direction DR1 (opposite the first side) from a rear (opposite the second side) end (10th end, edge) EP10 of side SS3 in direction DR3, and an upper end (11th end, edge) EP11 of side SS3 in direction DR2 is located on the opposite side to the rail 3 side in direction DR1 (opposite the first side) from a lower end (12th end, edge) EP12 of side SS3 in direction DR2.

[0065] In addition, side SS4 is inclined with respect to plane PL1 so that its front (second side) end (13th end, edge) EP13 in direction DR3 of side SS4 is located on the opposite side to the rail 3 side in direction DR1 (opposite the first side) from its rear (opposite the second side) end (14th end, edge) EP14 in direction DR3 of side SS4, and its upper end (15th end, edge) EP15 in direction DR2 of side SS4 is located on the opposite side to the rail 3 side in direction DR1 (opposite the first side) from its lower end (16th end, edge) EP16 in direction DR2 of side SS4.

[0066] The pressing portion 25 presses the rail 3 against the upper surface 4a of the support portion 7 and fastens it in place with the side surface SS4 of the washer member 32 in contact with the side surface SS3 of the protrusion 28, the washer member 32 positioned on the through hole portion 29 and the bottom 3b of the rail 3 so as to straddle the portion of the tie plate 4 between the protrusion 28 and the rail 3, the through hole 35 overlapping with the through hole 31 in a planar view, and the male threaded portion 33 being positioned in the through holes 31 and 35, and the third threaded portion screws into the fourth threaded portion.

[0067] In such a case, the protrusion 8 can regulate the positional deviation toward the protrusion 8 side (first side) in the direction DR1 of the rail 3, and the protrusion 28 can regulate the positional deviation toward the protrusion 28 side (opposite the first side) in the direction DR1 of the rail 3. In addition, in a plan view, a portion between a side surface SS1 of the protrusion 8 of the tie plate 4 and a side surface SS3 of the protrusion 28 of the tie plate 4 can have a parallelogram shape. Therefore, as shown in FIG. 11, the washer member 12 and the washer member 32 move diagonally and parallel to each other in a plan view to perform a gauge adjustment in which the position of the rail 3 is shifted in the direction DR1 (width direction of the rail 3), and as shown in FIG. 12, the washer member 12 and the washer member 32 move diagonally and anti-parallel to each other in a plan view to perform a height adjustment in which the position of the rail 3 is shifted in the direction DR2 (up-down direction).

[0068] That is, the position of the rail 3 in direction DR1 (width direction of the rail 3) is adjusted by washer member 12 and washer member 32 moving diagonally parallel to each other in a planar view, and the position of the rail 3 in direction DR2 (up-down direction) is adjusted by washer member 12 and washer member 32 moving diagonally anti-parallel to each other in a planar view.

[0069] Preferably, the washer member 32 includes a lower surface (second lower surface) 32a and a notch portion (second notch portion) 32b. The notch portion 32b is formed in an edge portion (third edge portion) PP3 of the lower surface 32a on the rail 3 side (first side) in the direction DR1, extends in the direction DR3, and engages with an edge portion (fourth edge portion) PP4 of the bottom portion 3b of the rail 3 on the opposite side to the center side of the rail 3 in the direction DR1 (opposite side to the first side). The position of the washer member 32 in the direction DR3 is adjusted according to the position of the rail 3 in the directions DR1 and DR2 so that the notch portion 32b engages with the edge portion PP4 and the side surface SS4 contacts the side surface SS3.

[0070] In this case, with the positional deviation of the edge PP3 of the washer member 32 on the rail 3 side toward the rail 3 side (first side) in the direction DR1 being restricted by the edge PP4 of the bottom part 3b of the rail 3, it is easy to perform a gauge adjustment by shifting the position of the rail 3 in the width direction of the rail 3, and also easy to perform a height adjustment by shifting the position of the rail 3 in the vertical direction. Therefore, it is easy to perform the height adjustment of the rail 3 and the washer member 32, and it is easy to perform the gauge adjustment of the rail 3 and the washer member 32, without inserting an adjustment plate under the washer member 32.

[0071] Preferably, the tie plate 4 includes a top surface 4c, a fixing portion 41 that is disposed on the opposite side to the rail 3 side in the direction DR1 (opposite the first side) from the protruding portion 28, and is fixed to the support body 2. The protruding portion 28 protrudes upward beyond the top surface 4c of the fixing portion 41. The fixing portion 41 has a through hole 6a for the rail screw 6 formed therein.

[0072] In such a case, the fixing portion 41 of the tie plate 4 can be easily fixed to the support 2 such as a sleeper.

[0073] The invention made by the inventor has been specifically described above based on the embodiment thereof. However, it goes without saying that the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention.

[0074] Within the scope of the concept of the present invention, a person skilled in the art may conceive of various modifications and alterations, and it is understood that these modifications and alterations also fall within the scope of the present invention.

[0075] For example, any embodiment in which a person skilled in the art has appropriately added or deleted components or modified the design, or added or omitted steps or modified conditions, is included within the scope of the present invention as long as it satisfies the essence of the present invention. [Industrial Applicability]

[0076] The present invention is effectively applied to a rail fastening device that fastens a rail to a support body that supports the rail. [Explanation of symbols]

[0077] 1 Rail fastening device 2 Support 3. Rail 3a head 3b bottom 3c abdomen 4 Tie Plate 4a~4c top surface 5, 25 Pressing part 6 Rail screws 6a, 11, 15, 31, 35 through hole 7 Placement section 8, 28 protrusion 9, 29 Through hole 12, 32 Washer member 12a, 32a bottom side 12b, 32b Cutout 13, 33 Male thread 14, 34 Female thread 16, 36 head 17, 37 volts 18, 38 Nut 19 Adjustment plate 21, 41 Fixed part DR1~DR3 direction EP1, EP10~EP16, EP2~EP8 Ends PL1 side PP1~PP4 Edge SS1~SS4 Side

Claims

1. A rail fastening device for fastening a rail to a support member supporting the rail, a tie plate fixed to the support and including a first upper surface on which the rail rests; a first pressing portion that presses the rail placed on the first upper surface of the tie plate against the first upper surface of the tie plate to fasten the rail to the first upper surface of the tie plate; having The tie plate is a mounting portion including the first upper surface, on which the rail is mounted; a first protruding portion disposed on a first side in a first direction, which is a width direction of the rail, relative to the placement portion and protruding upward from the first upper surface of the placement portion; a first through hole portion disposed between the mounting portion and the first protruding portion and having a first through hole penetrating in a second direction, which is a vertical direction; Including, The first pressing portion is a first washer member having a second through hole penetrating in the second direction and configured to press the rail; A first male screw portion that can be inserted into the first through hole and the second through hole; A first female thread portion that can be screwed into the first male thread portion; Including, a first threaded portion, which is one of the first male threaded portion and the first female threaded portion, is screwed into a second threaded portion, which is the other of the first male threaded portion and the first female threaded portion, with the second through hole overlapping with the first through hole in a plan view and the first male threaded portion being disposed in the first through hole and the second through hole; the first protrusion includes a first side surface opposite the first side in the first direction, the first washer member includes a second side surface on the first side in the first direction; the first side surface is inclined with respect to a first plane perpendicular to the first direction such that a first end portion of the first side surface on a second side in a third direction, which is a length direction of the rail, is located on the opposite side to the first side in the first direction from a second end portion of the first side surface on the opposite side to the second side in the third direction, and a third end portion on an upper side of the first side surface is located on the first side in the first direction from a fourth end portion on a lower side of the first side surface, the second side surface is inclined with respect to the first surface such that a fifth end portion of the second side in the third direction of the second side surface is located on the opposite side to the first side in the first direction from a sixth end portion of the second side surface on the opposite side to the second side in the third direction, and a seventh end portion of an upper side of the second side surface is located on the first side in the first direction from an eighth end portion of a lower side of the second side surface, a first pressing portion that presses the rail against the first upper surface of the mounting portion and fastens the rail by screwing the first threaded portion into the second threaded portion with the second side surface of the first washer member in contact with the first side surface of the first protrusion, the second through hole overlapping the first through hole in a planar view, and the first male threaded portion being positioned in the first through hole and the second through hole.

2. The rail fastening device according to claim 1, The first washer member is A first lower surface; a first cutout portion formed on a first edge portion of the first lower surface opposite to the first side in the first direction, extending in the third direction, and engaging with a second edge portion of the bottom of the rail on the first side in the first direction; Including, A rail fastening device, wherein the position of the first washer member in the third direction is adjusted according to the position of the rail in the first direction and the second direction so that the first cutout portion engages with the second edge portion and the second side contacts the first side.

3. The rail fastening device according to claim 1, the rail is placed on the first upper surface of the placement section via an adjustment plate that adjusts a gap between the first upper surface and the rail, A rail fastening device, wherein a lower surface of the first washer member is spaced apart from the first through-hole portion.

4. The rail fastening device according to claim 2, a first width of the first cutout portion in the first direction is equal at any position in the third direction; A rail fastening device, wherein a first depth of the first cutout portion in the second direction is equal at any position in the third direction.

5. The rail fastening device according to claim 1, the tie plate includes a second upper surface, the tie plate includes a fixing portion that is disposed on the first side in the first direction relative to the first protruding portion and is fixed to the support body, A rail fastening device, wherein the first protrusion protrudes upwardly beyond the second upper surface of the fixing portion.

6. The rail fastening device according to claim 1, The first pressing portion includes a first bolt including the first male thread portion and a first head portion, The first female thread portion is a first nut, the first threaded portion is the first nut, The second threaded portion is the first male threaded portion, the first nut is screwed into the first male thread portion included in the first bolt in a state in which the second through hole overlaps with the first through hole in a plan view, the first male thread portion is inserted into the second through hole, and the first head portion is engaged with the first through hole; a first nut that is threadedly engaged with the first male threaded portion of the first bolt while the second through hole overlaps with the first through hole in a plan view, the first male threaded portion is inserted into the second through hole, and the first head is engaged with the first through hole, thereby pressing the rail against the first upper surface of the mounting portion and fastening the rail.

7. The rail fastening device according to any one of claims 1 to 6, a second pressing portion that presses the rail placed on the first upper surface of the tie plate against the first upper surface of the tie plate to fasten the rail to the first upper surface of the tie plate, The tie plate is a second protruding portion disposed on a side opposite to the first side in the first direction from the placement portion and protruding upward from the first upper surface of the placement portion; a second through hole portion disposed between the mounting portion and the second protruding portion and having a third through hole penetrating in the second direction; Including, The second pressing portion is a second washer member having a fourth through hole penetrating in the second direction and configured to press the rail; A second male screw portion that can be inserted into the third through hole and the fourth through hole; A second female thread portion that can be screwed into the second male thread portion; Including, In a state in which the fourth through hole overlaps with the third through hole in a plan view and the second male threaded portion is disposed in the third through hole and the fourth through hole, the third threaded portion, which is one of the second male threaded portion and the second female threaded portion, is screwed into the fourth threaded portion, which is the other of the second male threaded portion and the second female threaded portion; the second protrusion includes a third side surface on the first side in the first direction, the second washer member includes a fourth side opposite the first side in the first direction, the third side surface is inclined with respect to the first surface such that a ninth end portion of the third side surface on the second side in the third direction is located on the opposite side to the first side in the first direction from a tenth end portion of the third side surface on the opposite side to the second side in the third direction, and an eleventh end portion of an upper side of the third side surface is located on the opposite side to the first side in the first direction from a twelfth end portion of a lower side of the third side surface, the fourth side surface is inclined with respect to the first surface such that a thirteenth end of the fourth side surface on the second side in the third direction is located on the opposite side to the first side in the first direction from a fourteenth end of the fourth side surface on the opposite side to the second side in the third direction, and a fifteenth end of an upper side of the fourth side surface is located on the opposite side to the first side in the first direction from a sixteenth end of a lower side of the fourth side surface; a rail fastening device in which the second pressing portion presses the rail against the first upper surface of the mounting portion and fastens it by the third screw portion screwing into the fourth screw portion with the fourth side surface of the second washer member in contact with the third side surface of the second protrusion, the fourth through hole overlapping the third through hole in a planar view, and the second male screw portion being positioned in the third through hole and the fourth through hole.

8. The rail fastening device according to claim 7, The second washer member is A second lower surface; and a second cutout portion formed on a third edge portion of the second lower surface on the first side in the first direction, extending in the third direction, and engaging with a fourth edge portion of the bottom of the rail on the opposite side to the first side in the first direction; Including, A rail fastening device, wherein the position of the second washer member in the third direction is adjusted according to the position of the rail in the first direction and the second direction so that the second cutout portion engages with the fourth edge portion and the fourth side contacts the third side.

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