Rail Fastening Device

Abstract

To provide a rail fastening device in which a connecting member for connecting a leaf spring clip and an anchor is hard to slip out from the anchor in a rail longitudinal direction.SOLUTION: With a turning shaft part 141 of a coupling member 140 inserted into a through hole 112b1 of a first clip positioning part 112b of an anchor 110 and a through hole 112c1 of a second clip positioning part 112c and the inside of a curved area B of a leaf spring clip 120, a clip contacting part 141b of the coupling member 140 contacts the leaf spring clip 120 by rotating the coupling member 140 around an axis center of the rotary shaft part 141a in a specified coupling direction, the clip contacting part 141b of the coupling member 140 is opposed in a rail longitudinal direction to the first clip positioning portion 112b of the anchor 110.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rail fastening device for fastening a rail to a rail support body. [Background technology]

[0002] A known rail fastening device that fastens a rail to a rail support by the elastic force of a leaf spring clip is one that has an anchor whose lower part is fixed to the rail support on the side of the rail and whose head has a cam insertion hole in the longitudinal direction of the rail; a leaf spring clip that is integrally formed with a lower part of the anchor having a through hole that passes through the head of the anchor and a spring upper part that rises from the outer end of the lower part and has a tip that elastically contacts the upper surface of the rail bottom of the rail; and a cam (connecting member) that is inserted into the cam insertion hole of the anchor above the lower part and rotates to give the lower part a predetermined elastic deflection, thereby connecting the leaf spring clip to the anchor by an elastic fastening force generated at the tip of the spring part against the flange of the rail (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Microfilm of Utility Model Application No. 56-87371 (Utility Model Application No. 57-202401) (particularly Figure 1) Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described rail fastening device, the frictional force acting between the cam and the anchor prevents the cam from slipping out of the anchor in the longitudinal direction of the rail. However, preventing the cam from slipping out in the longitudinal direction of the rail using frictional force cannot be said to be reliable, and there is room for further improvement in preventing the cam from slipping out in the longitudinal direction of the rail.

[0005] Therefore, the present invention solves the problems of the prior art as described above. That is, an object of the present invention is to provide a rail fastening device in which a coupling member for coupling a leaf spring clip and an anchor is difficult to come out of the anchor in the longitudinal direction of the rail.

Means for Solving the Problems

[0006] The invention according to claim 1 is a rail fastening device for fixing the rail to the rail support, comprising a pair of left and right anchors embedded in the rail support on the side of the rail for positioning the rail in the left and right directions, a pair of left and right leaf spring clips pressing the upper surface of the bottom of the rail toward the flat rail installation seat surface of the rail support, and a coupling member for attaching and coupling the leaf spring clip to the anchor. The leaf spring clip has a curved region formed by an intermediate curved plate portion obtained by curving a strip-shaped steel plate up and down in the strip longitudinal direction, an upper flat plate portion extending from an upper portion of the intermediate curved plate portion and seating on the upper surface of the bottom of the rail via an insulator, and a lower bent plate portion extending from a lower portion of the intermediate curved plate portion and partially inserted into the anchor. The anchor has an embedded portion embedded in the rail support and a head integrally formed with the embedded portion for accommodating the lower bent plate portion of the leaf spring clip. The head of the anchor has a base portion embedded in the rail installation seat surface of the rail support, and a first clip positioning portion and a second clip positioning portion for restricting the forward and backward movement of the leaf spring clip in the longitudinal direction of the rail. The coupling member is formed by a rotation shaft portion inserted through a through hole of the first clip positioning portion of the anchor and through the curved region of the leaf spring clip and into a through hole of the second clip positioning portion, and a head provided on the first clip side of the rotation shaft portion and abutting against the first clip positioning portion of the anchor. The pivot shaft portion of the connecting member has a pivot shaft portion extending in the longitudinal direction of the rail and a clip abutment portion protruding from the pivot shaft portion in the axial radial direction and capable of abutting the upper surface of the lower bent plate portion of the leaf spring clip as the pivot shaft portion rotates. When the pivot shaft portion of the connecting member is inserted into the through hole of the first clip positioning portion of the anchor, the through hole of the second clip positioning portion of the anchor and the curved region of the leaf spring clip, the connecting member is rotated about the axis of the pivot shaft portion in a predetermined connecting direction so that the clip abutment portion of the connecting member abuts the leaf spring clip. This solves the above-mentioned problem.

[0007] The invention of claim 2 further solves the above-mentioned problem by, in addition to the configuration of the rail fastening device described in claim 1, forming a flat surface on the pivot portion of the connecting member that faces and spaced apart from the flat through-hole edge formed in the second clip positioning portion of the anchor when the clip abutment portion of the connecting member abuts against the upper surface of the lower bent plate portion of the leaf spring clip.

[0008] The invention of claim 3 further solves the above-mentioned problems by providing, in addition to the configuration of the rail fastening device described in claim 1 or 2, a head of the anchor having a clip falling prevention portion that rises from the base portion and restricts the movement of the leaf spring clip toward the outside of the rail.

[0009] The invention of claim 4 further solves the above-mentioned problems by providing, in addition to the configuration of the rail fastening device described in any one of claims 1 to 3, a head of the anchor having a clip movement restricting portion that rises from the base portion and restricts the sliding of the leaf spring clip toward the inside of the rail.

[0010] The invention of claim 5 further solves the above-mentioned problem by, in addition to the configuration of the rail fastening device described in any one of claims 1 to 4, the center of the head of the connecting member being eccentric with respect to the axis of the pivot shaft of the connecting member. Effect of the Invention

[0011] In the invention of claim 1, when the pivot shaft portion of the connecting member is inserted into the through hole of the first clip positioning portion of the anchor, the through hole of the second clip positioning portion and the curved region of the leaf spring clip, and the connecting member is rotated about the axis of the pivot shaft portion in a predetermined connecting direction so that the clip abutment portion of the connecting member abuts the leaf spring clip, the clip abutment portion of the connecting member is formed to be freely abutted and stopped in the longitudinal direction of the rail against the inner wall surface of the first clip positioning portion of the anchor.Therefore, even if an attempt is made to pull the connecting member out of the anchor in the longitudinal direction of the rail with the clip abutment portion of the connecting member abutting the leaf spring clip, or even if vibrations or the like from the rail are applied to the connecting member and the anchor and the connecting member moves in the longitudinal direction of the rail, the clip abutment portion of the connecting member abuts and is stopped against the inner wall surface of the first clip positioning portion of the anchor, so that it is possible to more reliably prevent the connecting member from coming out of the anchor in the longitudinal direction of the rail.

[0012] According to the rail fastening device of the invention of claim 2, in addition to the effects achieved by the rail fastening device of the invention of claim 1, a flat surface that faces and is spaced apart from the flat through-hole edge formed in the second clip positioning portion of the anchor when the clip abutment portion of the connecting member abuts against the upper surface of the lower bent plate portion of the leaf spring clip is formed on the pivot portion of the connecting member, so that when the connecting member attempts to rotate in the opposite direction to the connecting direction, the flat surface of the connecting member abuts against the flat through-hole edge of the second clip positioning portion and the connecting member is pressed toward the leaf spring clip, and therefore, a moment acts on the connecting member from the leaf spring clip to rotate the connecting member in the connecting direction, making it difficult to rotate the connecting member in the opposite direction to the connecting direction.

[0013] According to the rail fastening device of the invention as claimed in claim 3, in addition to the effects achieved by the rail fastening device of the invention as claimed in claim 1 or 2, the head of the anchor has a clip falling prevention part that rises from the base part and restricts the movement of the leaf spring clip towards the outside of the rail. Therefore, even if the abutment between the clip abutment part of the connecting member and the leaf spring clip loosens and the leaf spring clip is about to move towards the outside of the rail in a direction in which it would fall off from the anchor, the leaf spring clip is restricted from falling off from the anchor by the clip falling prevention part, so that the fixation of the rail by the leaf spring clip can be reliably maintained for a long period of time.

[0014] According to the rail fastening device of the invention as claimed in claim 4, in addition to the effects achieved by the rail fastening device of the invention as claimed in any one of claims 1 to 3, the head of the anchor has a clip movement restricting portion that rises from the base portion and restricts the sliding of the leaf spring clip towards the inside of the rail. Therefore, when the connecting member is inserted into the curved regions of the anchor and the leaf spring clip and the connecting member is rotated in a predetermined connecting direction, a force is applied to the leaf spring clip towards the inside of the rail from the clip abutment portion of the connecting member, and even if the leaf spring clip slides towards the inside of the rail, the leaf spring clip abuts against the clip movement restricting portion of the anchor. Therefore, when the connecting member is rotated in the connecting direction, the leaf spring clip is less likely to slide sideways relative to the anchor, and the leaf spring clip and the anchor can be easily connected by the connecting member.

[0015] According to the rail fastening device of the invention of claim 5, in addition to the effects achieved by the rail fastening device of the invention of any one of claims 1 to 4, the center of the head of the connecting member is eccentric with respect to the axis of the pivot shaft of the connecting member. Therefore, when the connecting member is inserted into the anchor and the leaf spring clip and rotated in the connecting direction, the head of the connecting member is positioned farther from the rail than the pivot shaft. This makes it easier to attach a tool for rotating the connecting member in the connecting direction to the head of the connecting member, and makes it easy to rotate the connecting member in the connecting direction. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view showing an installation form of a rail fastening device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the rail fastening device shown in FIG. [Diagram 3] Cross-sectional view taken along line III-III in FIG. [Figure 4A] FIG. 2 is a plan view of the anchor shown in FIG. 1 . [Figure 4B] A view from the IVB direction of FIG. 4A. [Figure 4C] View from the IVC direction of Figure 4A. [Figure 5A] FIG. 2 is a side view of the flat spring clip shown in FIG. [Figure 5B] FIG. 5B is a plan view of the flat spring clip as viewed from the VB direction in FIG. 5A. [Figure 6A] FIG. [Figure 6B] View from the VIB direction of Figure 6A. [Figure 6C] View from the VIC direction of Figure 6A. [Figure 7A] A plan view of the rails placed on the sleepers. [Figure 7B] VIIB-VIIB cross-sectional view of FIG. 7A. [Figure 8A] FIG. 13 is a plan view of the leaf spring clip inserted into the anchor. [Figure 8B] Cross-sectional view taken along line VIIIB-VIIB of FIG. 8A. [Figure 9A] FIG. [Figure 9B] Cross-sectional view of FIG. 9A along line IXB-IXB. [Figure 10A] FIG. 13 is a plan view of the joining member rotated in the joining direction. [Figure 10B] Cross-sectional view of FIG. 10A along XB-XB line. [Figure 11A] FIG. 9B is a perspective view of a main part as seen from the XIA direction in FIG. 9A. [Figure 11B] FIG. 10B is a perspective view of a main part as seen from a direction XIB of FIG. 10A. [Figure 12A] FIG. 10B is an end view taken from the direction XIIA of FIG. 10A. [Figure 12B] XIIB-XIIB cross-sectional view of FIG. 12A. [Figure 13] FIG. 10B is an end view seen from the direction XIII in FIG. 10A. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The present invention relates to a rail fastening device for fixing a rail to a rail support body, the device comprising a pair of left and right anchors that are embedded in the rail support body on the sides of the rail to position the rail in the left and right direction, a pair of left and right leaf spring clips that press the upper surface of the rail bottom of the rail against the flat rail installation seat surface of the rail support body, and a connecting member that attaches and connects the leaf spring clips to the anchors. The leaf spring clips are provided with an intermediate curved plate portion made by bending a rectangular steel plate vertically in the longitudinal direction of the rectangular steel plate, and an insulator extending from an upper portion of the intermediate curved plate portion and provided on the upper surface of the rail bottom of the rail. The anchor has a curved region formed by an upper flat plate portion that sits on the rail support and a lower curved plate portion that extends from a lower portion of the intermediate curved plate portion and is partially inserted into the anchor, the anchor has an embedding portion that is embedded in the rail support and a head portion that is formed integrally with the embedding portion and that houses the lower curved plate portion of the leaf spring clip, the head portion of the anchor has a base portion that is embedded in the rail installation seat surface of the rail support, and a first clip positioning portion and a second clip positioning portion that restrict forward and backward movement of the leaf spring clip in the longitudinal direction of the rail, and the coupling member is The coupling member is formed of a pivot shaft portion which is inserted from the through hole of the lip positioning portion through the curved region of the leaf spring clip into the through hole of the second clip positioning portion, and a head portion which is provided on the first clip side of the pivot shaft portion and abuts against the first clip positioning portion of the anchor, and the pivot shaft portion of the coupling member has a pivot shaft portion which extends in the longitudinal direction of the rail, and a clip abutment portion which protrudes from the pivot shaft portion in the axial radial direction and can abut against the upper surface of the lower bent plate portion of the leaf spring clip as the pivot shaft portion rotates. When the connecting member is inserted into the through hole of the second clip positioning portion and into the curved region of the leaf spring clip and rotated around the axis of the pivot shaft in a predetermined connecting direction so that the clip abutment portion of the connecting member abuts the leaf spring clip, the clip abutment portion of the connecting member is formed so as to be able to abut and be stopped freely against the inner wall surface of the first clip positioning portion of the anchor in the longitudinal direction of the rail, and the connecting member that connects the leaf spring clip to the anchor is not likely to come loose from the anchor in the longitudinal direction of the rail, the specific embodiment may be any one.

[0018] For example, the specific form of the rail support to which the rail fastening device of the present invention is applied may be a sleeper made of so-called prestressed concrete (PC) made by applying compressive force to concrete using steel material to which a tensile force has been applied in advance, thereby making the concrete strong, and so long as the anchors are embedded at specified embedding intervals, it may be any of the following sleepers, such as vibration-isolating sleepers or ballast elastic sleepers.

[0019] Furthermore, with regard to the specific form of the rail to which the rail fastening device of the present invention is applied, so long as it has an inverted T-shaped rail cross section with a wide, flat rail bottom relative to the rail head, i.e., a so-called flat-bottom rail, any rail may be used, such as a 37 kg rail (a rail having a weight of 37 kg per 1 m of length), a 40 kg rail (a rail having a weight of 40 kg per 1 m of length), a 50 kg rail (a rail having a weight of 50 kg per 1 m of length), or a 60 kg rail (a rail having a weight of 60 kg per 1 m of length) with a wider bottom width than these. Regarding the cross-sectional shape of the rail, the rail bottom may have a constant inclined surface (bottom downward inclined surface), or the rail bottom may have a rail bottom upper surface consisting of two different inclined surfaces, i.e., a first inclined surface (bottom downward inclined surface) that is continuously formed in a flared shape from the rail body, and a second inclined surface (bottom gentle slope) that is continuously formed from this first inclined surface (bottom downward inclined surface). EXAMPLES

[0020] A rail fastening device 100 according to one embodiment of the present invention will now be described with reference to Figs.

[0021] <1. Peripheral structure of rail fastening device> First, the peripheral structure of a rail fastening device 100 according to one embodiment of the present invention will be described with reference to Figs. 1 is a perspective view showing an installation form of a rail fastening device according to an embodiment of the present invention, FIG. 2 is a perspective exploded view of the rail fastening device shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III in FIG.

[0022] A rail fastening device 100 of this embodiment is for fixing a rail R to a sleeper S, which is a rail support installed on a roadbed G, as shown in Figs.

[0023] The rail R comprises a rail head portion Ru having a rectangular cross section that comes into contact with the railway wheels, a rail body portion Rm that extends vertically downward from the rail head portion Ru and has a shorter length in the rail short side direction than the rail head portion Ru, and a rail bottom portion Rb that extends in the rail short side direction from the lower end of the rail body portion Rm. The rail head Ru has a wheel contact surface Ru1 that contacts the railway wheels, a rail head side surface Ru2 that extends downward from the end of the wheel contact surface Ru1 in the rail short direction, and a rail head inclined surface Ru3 that extends from the lower end of the rail head side surface Ru2 toward the rail body Rm. The rail bottom Rb has a rail bottom upper surface Rb1 opposing the rail head inclined surface Ru3, and a rail bottom side surface Rb2 extending downward from an end of the rail bottom upper surface Rb1 in the rail short direction.

[0024] As shown in Figs. 1 to 3, the sleeper S has a rail installation bearing surface Sf on the side on which the rail R is installed, which is substantially flat.

[0025] A track pad P made of rubber or resin is laid on the bottom surface of the rail R (that is, the rail bottom surface Rb3 of the rail bottom portion Rb). The track pad P, which is interposed between the rail R and the sleeper S, protects the sleeper S by reducing the load transmitted to the sleeper S below the rail R as the vehicle travels, and also plays a role in reducing vibrations generated by the rail R and the associated noise.

[0026] <2. Structure of rail fastening device> Next, the structure of a rail fastening device 100 according to one embodiment of the present invention will be described with reference to Figs. 1 to 6C. 4A is a plan view of the anchor shown in FIG. 1, FIG. 4B is a view from the IVB direction of FIG. 4A, FIG. 4C is a view from the IVC direction of FIG. 4A, FIG. 5A is a side view of the leaf spring clip shown in FIG. 1, FIG. 5B is a plan view of the leaf spring clip from the VB direction of FIG. 5A, FIG. 6A is a side view of the connecting member, FIG. 6B is a view from the VIB direction of FIG. 6A, and FIG. 6C is a view from the VIC direction of FIG. 6A.

[0027] As shown in Figures 1 to 3, the rail fastening device 100 includes a pair of left and right anchors 110 that position the rail R in the left-right direction on the sides of the rail R, a pair of left and right leaf spring clips 120 that press the upper surface Rb1 of the rail bottom Rb of the rail R toward the flat rail installation seat Sf of the sleeper S, an insulator 130 that is interposed between the rail R and the leaf spring clips 120, and a connecting member 140 that attaches and connects the anchors 110 to the leaf spring clips 120.

[0028] <2.1. Anchor structure> As shown in FIGS. 3 and 4B, the anchor 110 has an embedded portion 111 that is embedded in the sleeper S and extends in the vertical direction, and a head portion 112 that is formed integrally with the embedded portion 111 and partially accommodates the leaf spring clip 120.

[0029] As shown in Figs. 4B and 4C, embedded portion 111 has rib portions 111a formed in the up-down, left-right and front-rear directions to increase the contact area with sleeper S, and has a cross-sectional shape.

[0030] The head 112 receives a portion of the leaf spring clip 120, as shown in FIGS. As shown in Figures 4A to 4C, the head 112 has a base portion 112a embedded in the rail installation seat Sf of the sleeper S, a first clip positioning portion 112b and a second clip positioning portion 112c that regulate the forward and backward movement of the leaf spring clip 120 in the rail longitudinal direction (front-to-back direction), and a connecting portion 112d that connects the first clip positioning portion 112b and the second clip positioning portion 112c to suppress deformation in the rail longitudinal direction applied to the first clip positioning portion 112b and the second clip positioning portion 112c. Furthermore, as shown in Figures 4A to 4C, the head 112 has a clip fall prevention portion 112e that rises from the base portion 112a and restricts the movement of the leaf spring clip 120 toward the outside of the rail, and a clip movement restriction portion 112f that rises from the base portion 112a and restricts the sliding of the leaf spring clip 120 toward the inside of the rail.

[0031] As shown in Figs. 4A to 4C, the base portion 112a is in the shape of a flat plate, and the upper surface thereof is substantially flush with the rail installation seating surface Sf of the sleeper S.

[0032] As shown in FIGS. 4A and 4B, the first clip positioning portion 112b is formed with a through hole 112b1 extending in the front-rear direction. As shown in FIG. 4B, this through hole 112b1 is rectangular with a semicircular bulge at the upper end and is closed below the inner side of the rail by a joining member abutment region 112b2. The boundary between the connecting member contact area 112b2 and the through hole 112b1 is inclined downward toward the inside of the rail, as shown in FIG. 4B.

[0033] As shown in FIGS. 4A and 4C, second clip positioning portion 112c is formed with a through hole 112c1 extending in the front-rear direction. As shown in FIG. 4A, the through hole 112c1 of the second clip positioning portion 112c faces the first clip positioning portion 112b in the rail longitudinal direction. As shown in FIG. 4C, the through hole 112c1 has a rectangular shape, and the upper end side bulges out in a semicircular shape. An upper edge (through hole edge) 112c1a located at the top of this through hole 112c1 is flat as shown in FIG. 4C. Also, inner edge 112c1b on the inner side of the rail of through hole 121c1 extends in the vertical direction as shown in FIG. 4C.

[0034] As shown in FIGS. 4B and 4C, the connecting portion 112d rises from the base portion 112a and extends toward the outside of the rail.

[0035] As shown in FIGS. 4B and 4C, clip fall-off prevention portion 112e is provided on the outer side of the rail. Head 112 of anchor 110 has clip fall prevention portion 112e that rises from base portion 112a and restricts movement of leaf spring clip 120 toward the outside of the rail. Therefore, even if the abutment between clip abutment portion 141b of connecting member 140 and leaf spring clip 120 loosens and leaf spring clip 120 is about to move in a direction in which it falls off anchor 110 (i.e., toward the outside of the rail), leaf spring clip 120 is restricted from falling off anchor 110 by clip fall prevention portion 112e, so that fixation of rail R by leaf spring clip 120 can be reliably maintained for a long period of time.

[0036] As shown in FIGS. 4B and 4C, clip movement restricting portion 112f is provided on the inner side of the rail.

[0037] <2.2. Structure of the leaf spring clip> The flat spring clip 120 is a member formed by bending a rectangular steel plate, and has a curved region B as shown in FIG. 5A. As shown in Figures 3 and 5A, this leaf spring clip 120 has an intermediate curved plate portion 121 made by bending a rectangular steel plate up and down in the longitudinal direction of the rectangular plate, an upper flat plate portion 122 extending from an upper portion of the intermediate curved plate portion 121 and seating on the upper surface of the rail bottom Rb of the rail R via an insulator 130, and a lower bent plate portion 123 extending from a lower portion of the intermediate curved plate portion 121 and being partially inserted into the anchor 110. As shown in FIG. 5B, the upper flat plate portion 122 and the lower bent plate portion 123 of the leaf spring clip 120 are not provided with a through hole.

[0038] As shown in FIG. 5A, the lower bent plate portion 123 of the leaf spring clip 120 is formed from an anchor abutment portion 123a extending from the intermediate curved plate portion 121 and placed on the anchor 110, and a connecting member abutment portion 123b extending from the anchor abutment portion 123a and facing the connecting member 140. As shown in FIG. 3, the anchor abutting portion 123a of the leaf spring clip 120 abuts against the anchor 110 in a region surrounded by the clip falling-off prevention portion 112e and the clip movement restriction portion 112f of the anchor 110.

[0039] <2.3. Structure of insulator> As shown in Figures 1 and 2, the insulator 130 is a C-shaped member in a planar view having an anchor accommodating recess 131, and is formed of, for example, polyamide resin to provide electrical insulation between the anchor 110 and the leaf spring clip 120 and between the rail R and the rail R.

[0040] As shown in Figure 3, this insulator 130 is formed from an anchor abutment portion 132 that extends in a substantially vertical direction and abuts the anchor 110 and the rail bottom side surface Rb2 of the rail R, and a clip abutment portion 133 that extends from the upper end of the anchor abutment portion 132 toward the rail abdomen Rm of the rail R and abuts or faces the leaf spring clip 120 and the rail bottom upper surface Rb1 of the rail R.

[0041] <2.4. Structure of connecting members> As shown in Figures 2 and 6A, the connecting member 140 is formed from a pivot shaft portion 141 that is inserted into the through hole 112b1 of the first clip positioning portion 112b of the anchor 110, the through hole 112c1 of the second clip positioning portion 112c, and the curved region B of the leaf spring clip 120, and a head portion 142 that is provided on one end side of the pivot shaft portion 141 and abuts against the first clip positioning portion 112b of the anchor 110.

[0042] As shown in Figure 6A etc., the pivot shaft portion 141 has a pivot shaft portion 141a extending in the longitudinal direction of the rail, and a clip abutment portion 141b protruding in the axial radial direction (downward in Figure 6B) from the pivot shaft portion 141a and capable of freely abutting against the upper surface 123b1 (see Figure 5A) of the lower bent plate portion 123 of the leaf spring clip 120 as the pivot shaft portion 141a rotates. As shown in FIG. 6A etc., the rotation shaft portion 141a is a cylindrical portion, and as shown in FIG. 6B, a flat surface 141a1 is formed on the upper side. The clip abutment portion 141b is a prismatic portion as shown in FIG. 6B etc., and is spaced apart from the head portion 142 as shown in FIG. 6A.

[0043] As shown in FIG. 2 and FIGS. 6A to 6C, the head portion 142 has a hexagonal column shape. The center HC of the head portion 142 is eccentric with respect to the axis SC of the rotation shaft portion 141, as shown in FIG. 6C. Because the center HC of the head 142 is eccentric with respect to the axis SC of the pivot shaft 141, as shown in FIG. 3, in terms of the distance between the connecting member 140 and the insulator 130, the distance DH between the head 142 and the outer end surface 134 of the insulator 130 is greater than the distance DS between the pivot shaft 141 and the inclined outer end surface 134 of the insulator 130. Therefore, the head 142 of the connecting member 140 is positioned farther from the rail R than the pivot shaft portion 141, making it easier to attach a tool for rotating the connecting member 140 in the connecting direction (the direction toward the rail R) to the head 142 of the connecting member 140, and the connecting member 140 can be easily rotated in the connecting direction.

[0044] <3. Rail fixing method using rail fastening device> Next, a method for fastening a rail R using the rail fastening device 100 according to one embodiment of the present invention will be described with reference to FIG. 2 and FIG. 7A to FIG. 7A is a plan view of a rail placed on a sleeper, FIG. 7B is a VIIB-VIIB cross-sectional view of FIG. 7A, FIG. 8A is a plan view of a leaf spring clip inserted into the anchor, FIG. 8B is a VIIIB-VIIIB cross-sectional view of FIG. 8A, FIG. 9A is a plan view of a coupling member inserted, FIG. 9B is a IXB-IXB cross-sectional view of FIG. 9A, FIG. 10A is a plan view of a coupling member rotated in the coupling direction, FIG. 10B is an XB-XB cross-sectional view of FIG. 10A, FIG. 11A is a perspective view of a main part as seen from the XIA direction of FIG. 9A, FIG. 11B is a perspective view of a main part as seen from the XIB direction of FIG. 10A, FIG. 12A is an end view as seen from the XIIA direction of FIG. 10A, FIG. 12B is a XIIB-XIIB cross-sectional view of FIG. 12A, and FIG. 13 is an end view as seen from the XIII direction of FIG. 10A. For ease of explanation, the leaf spring clip 120 is omitted in FIGS. 11A, 11B, 12A, and 13.

[0045] <3.1. Installation of rail pads, rails, and insulators> A pair of anchors 110 are embedded in the sleeper S beforehand when the sleeper S is manufactured. As shown in FIG. 7B, the pair of left and right anchors 110 are embedded such that clip falling-off prevention portion 112e is located furthest from center line L of the pair of left and right anchors 110.

[0046] In order to fix a rail R to the sleeper S in which the pair of left and right anchors 110 are embedded, first, a track pad P is laid between the pair of left and right anchors 110. The rail pad P has recesses on both the left and right sides thereof for receiving the anchors 110. Therefore, the installation location of the rail pad P is determined by a pair of anchors 110 on the left and right.

[0047] After the railway pad P is laid on the sleepers S, the rail R is placed on the railway pad P. Then, as shown in FIG. 2, the insulator 130 is placed on the rail R so that the anchor 110 is received in the anchor receiving recess 131 of the insulator 130. At this time, as shown in FIG. 7B, anchor abutment portion 132 of insulator 130 installed on the outer side of the rail abuts anchor 110 and rail bottom side surface Rb2 of rail R, and clip abutment portion 133 abuts rail bottom upper surface Rb1 of rail R. Similarly, as shown in FIG. 7B, the anchor abutment portion 132 of the insulator 130 installed on the inside of the rail faces the connecting portion 112d of the anchor 110 and abuts against the rail bottom side surface Rb2 of the rail R, and the clip abutment portion 133 abuts against the rail bottom upper surface Rb1 of the rail R.

[0048] <3.2. Inserting the leaf spring clip> Next, in this state, the leaf spring clip 120 is inserted into the anchor 110 as shown in FIG. Specifically, first, the lower bent plate portion 123 of the leaf spring clip 120 is inserted into the space surrounded by the first clip positioning portion 112b, the second clip positioning portion 112c, and the connecting portion 112d of the anchor 110, and from this state, the anchor abutment portion 123a of the leaf spring clip 120 is seated between the clip fall-off prevention portion 112e and the clip movement restriction portion 112f of the anchor 110 as shown in Figures 8A and 8B. Therefore, the leaf spring clip 120 is restricted in its movement in the longitudinal direction of the rail by the first clip positioning portion 112b and the second clip positioning portion 112c of the anchor 110, and its movement in the transverse direction of the rail by the clip fall-off prevention portion 112e and the clip movement restricting portion 112f of the anchor 110.

[0049] <3.3. Insertion of connecting member> Next, in this state, as shown in FIG. 2, the connecting member 140 is inserted in the order of through hole 112b1 of the first clip positioning portion 112b of the anchor 110, curved region B of the leaf spring clip 120, and through hole 112c1 of the second clip positioning portion 112c of the anchor 110, so that the head 142 of the connecting member 140 is abutted against the first clip positioning portion 112b of the anchor 110. At this time, as shown in Figures 9A, 9B, and 11A, the connecting member 140 is rotated so that the clip abutment portion 141b of the connecting member 140 can be inserted into the through hole 112b1 of the first clip positioning portion 112b, in other words, the clip abutment portion 141b of the connecting member 140 is in line contact with the lower bent plate portion 123 of the leaf spring clip 120 in the longitudinal direction of the rail.

[0050] <3.4. Fixing the leaf spring clip with a connecting member> Next, in this state, the head 142 of the joining member 140 is rotated toward the inside of the rail, that is, in the joining direction. At this time, since the clip abutment portion 141b of the connecting member 140 abuts the lower bent plate portion 123 of the leaf spring clip 120 in the longitudinal direction of the rail, when the head 142 of the connecting member 140 is rotated in the connecting direction, a force is applied from the clip abutment portion 141b of the connecting member 140 to the lower bent plate portion 123 of the leaf spring clip 120 in the direction toward the inside of the rail, causing the leaf spring clip 120 to attempt to slide toward the inside of the rail. However, even if the leaf spring clip 120 slides toward the inside of the rail, the leaf spring clip 120 abuts against the clip movement restricting portion 112f of the anchor 110, so that the leaf spring clip 120 is less likely to slide sideways relative to the anchor 110 when the connecting member 140 is rotated in the connecting direction. Therefore, the clip movement restricting portion 112f of the anchor 110 makes it difficult for the flat spring clip 120 to slide sideways relative to the anchor 110, making it possible to easily join the flat spring clip 120 and the anchor 110 with the joining member 140.

[0051] When the head 142 of the connecting member 140 is rotated sufficiently in the connecting direction, the connecting member 140 rotates around the axis SC of the pivot shaft portion 141, and as shown in FIG. 10B, the clip abutment portion 141b of the connecting member 140 comes into surface contact with the lower bent plate portion 123 of the leaf spring clip 120, and at the same time, as shown in FIG. 11B, FIG. 12A and FIG. 12B, the flat surface 141a1 of the connecting member 140 faces and separates from the flat upper edge 112c1a of the second clip positioning portion 112c of the anchor 110. At this time, as shown in FIG. 12B, the connecting member abutment portion 123b of the leaf spring clip 120 abuts against the clip abutment portion 141b of the connecting member 140, and the pivot portion 141a of the connecting member 140 abuts against the first clip positioning portion 112b and the connecting portion 112d of the anchor 110, so that the reaction force N exerted by the leaf spring clip 120 on the connecting member 140 is transmitted to the first clip positioning portion 112b and the connecting portion 112d of the anchor 110. This makes it difficult for the rotation shaft portion 141a of the connecting member 140 to bend in a direction perpendicular to the axial direction.

[0052] Also, at this time, as shown in Figures 10B, 11B, and 12B, the clip abutment portion 141b of the connecting member 140 faces the connecting member abutment area 112b2 formed on the inner wall surface of the first clip positioning portion 112b of the anchor 110 in the rail longitudinal direction. As a result, even if an attempt is made to pull the connecting member 140 out of the anchor 110 in the rail longitudinal direction with the clip abutment portion 141b of the connecting member 140 in a state where it is in contact with the leaf spring clip 120, or even if vibrations or the like from the rail R are applied to the connecting member 140 and the anchor 110 and the connecting member 140 moves in the rail longitudinal direction, the clip abutment portion 141b of the connecting member 140 abuts against the connecting member abutment area 112b2 formed on the inner wall surface of the first clip positioning portion 112b of the anchor 110 and is stopped in place, so that it is possible to more reliably prevent the connecting member 140 from slipping out of the anchor 110 in the rail longitudinal direction.

[0053] In addition, when the clip abutment portion 141b of the connecting member 140 abuts against the upper surface 123b1 of the lower bent plate portion 123 of the leaf spring clip 120, as shown in FIG. 12A, a moment M in the connecting direction caused by a reaction force N acting from the leaf spring clip 120 to the clip abutment portion 141b of the connecting member 140 acts around the axis SC of the pivot shaft portion 141 of the connecting member 140. However, even if this moment M causes the connecting member 140 to rotate further in the connecting direction, the rail inner end 141b1 of the clip abutment portion 141b of the connecting member 140 abuts against the inner edge 112c1b of the through hole 112c1 of the second clip positioning portion 112c, thereby limiting excessive rotation of the connecting member 140 in the connecting direction.

[0054] Furthermore, when the connecting member 140 attempts to rotate in the opposite direction to the connecting direction from the state in which the clip abutment portion 141b of the connecting member 140 abuts against the upper surface 123b1 of the lower bent plate portion 123 of the leaf spring clip 120, as shown in FIG. 13, the flat surface end 141a1a of the flat surface 141a1 of the connecting member 140 abuts against the flat upper edge 112c1a of the second clip positioning portion 112c, and the connecting member 140 is pressed toward the leaf spring clip 120. As a result, a reaction force N acts on the connecting member 140 from the leaf spring clip 120, causing a moment M to act to rotate the connecting member 140 in the connecting direction, making it difficult for the connecting member 140 to rotate in the opposite direction to the connecting direction.

[0055] Although the rail fastening device 100 according to one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment. [Explanation of symbols]

[0056] 100 ... Rail fastening device 110 Anchor 111 ... embedded part 111a Rib part 112 ... head 112a: Base 112b First clip positioning portion 112b1 ··· Through hole 112b2 ··· Contact area of coupling member (inner wall surface) 112c ··· Second clip positioning portion 112c1 ··· Through hole 112c1a··· Upper edge (edge of through hole) 112c1b··· Inner edge 112d ··· Connecting portion 112e ··· Clip dropout prevention portion 112f ··· Clip movement restriction portion 120 ··· Leaf spring clip 121 ··· Intermediate curved plate portion 122 ··· Upper flat plate portion 123 ··· Lower bent plate portion 123a ··· Anchor contact portion 123b ··· Contact portion of coupling member 123b1 ··· Upper surface 130 ··· Insulator 131 ··· Anchor housing recess 132 ··· Anchor contact portion 133 ··· Clip contact portion 134 ··· Outer end face 140 ··· Coupling member 141 ··· Rotation shaft portion 141a ··· Rotation shaft part 141a1 ··· Flat surface 141a1a··· End of flat surface 141b ··· Clip contact portion 142 ··· Head G ··· Roadbed P ··· Track pad R ··· Rail Ru ··· Rail head Ru1 ··· Wheel contact surface Ru2 ··· Side surface of rail head Ru3 ··· Inclined surface of rail head Rm ··· Rail web Rb: Bottom of rail Rb1: Rail bottom top surface Rb2: Bottom side of rail Rb3: Bottom surface of rail Rbu...Top surface S ··· Sleeper (rail support) Sf: Rail mounting surface B: Curved region HC: Center of head of connecting member SC: Axis center of the pivot shaft of the connecting member L...center line C: Axial center of connecting member N: Reaction force acting on connecting member M: Moment in the bond direction

Claims

1. A rail fastening device for fixing a rail to a rail support body, the device comprising: a pair of left and right anchors that are embedded in a rail support body on the sides of the rail to position the rail in the left and right direction; a pair of left and right leaf spring clips that press an upper surface of the rail bottom of the rail against the flat rail installation seat surface of the rail support body; and a connecting member that attaches and connects the leaf spring clips to the anchors, the device comprising: The leaf spring clip has a curved region formed by an intermediate curved plate portion obtained by curving a rectangular steel plate up and down in the longitudinal direction of the rectangular steel plate, an upper flat plate portion extending from an upper portion of the intermediate curved plate portion and seating on an upper surface of the rail bottom of the rail via an insulator, and a lower bent plate portion extending from a lower portion of the intermediate curved plate portion and partially inserted into the anchor, The anchor has an embedded portion that is embedded in the rail support, and a head portion that is integrally formed with the embedded portion and that receives the lower bent plate portion of the leaf spring clip, a head portion of the anchor has a base portion embedded in the rail installation seat surface of the rail support body, and a first clip positioning portion and a second clip positioning portion that restrict forward and backward movement of the leaf spring clip in the rail longitudinal direction, the coupling member is formed of a pivot shaft portion that is inserted from a through hole of the first clip positioning portion of the anchor through a curved region of the leaf spring clip into a through hole of the second clip positioning portion, and a head portion that is provided on the first clip side of the pivot shaft portion and abuts against the first clip positioning portion of the anchor, the pivot shaft portion of the connecting member has a pivot shaft portion extending in the rail longitudinal direction and a clip abutment portion protruding from the pivot shaft portion in the axial radial direction and adapted to abut against an upper surface of the lower bent plate portion of the leaf spring clip as the pivot shaft portion rotates; A rail fastening device characterized in that when the pivot shaft portion of the connecting member is inserted into the through hole of the first clip positioning portion of the anchor, the through hole of the second clip positioning portion and into the curved region of the leaf spring clip, and the connecting member is rotated about the axis of the pivot shaft portion in a predetermined connecting direction so that the clip abutment portion of the connecting member abuts against the leaf spring clip, the clip abutment portion of the connecting member is formed so as to be freely abutted and stopped against the inner wall surface of the first clip positioning portion of the anchor in the longitudinal direction of the rail.

2. The rail fastening device according to claim 1, characterized in that a flat surface that faces and is spaced apart from a flat through-hole edge formed in the second clip positioning portion of the anchor when the clip abutment portion of the connecting member abuts against the upper surface of the lower bent plate portion of the leaf spring clip is formed in the pivot portion of the connecting member.

3. 3. The rail fastening device according to claim 1, wherein a head of the anchor has a clip fall-off prevention portion that rises from the base portion and restricts movement of the leaf spring clip toward the outside of the rail.

4. 4. The rail fastening device according to claim 1, wherein a head of the anchor has a clip movement restricting portion that rises from the base portion and restricts the sliding of the leaf spring clip toward the inside of the rail.

5. 5. The rail fastening device according to claim 1, wherein the center of the head of the coupling member is eccentric with respect to the axis of the rotation shaft of the coupling member.

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