JP2017197918A - Leaf spring clip and rail fastening device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leaf spring clip and a rail fastening device using the same that enable a rail to be positioned and fitted securely on a rail support body and suppress excessive tilting of the rail toward an outer track side that often takes place when a train passes.SOLUTION: A leaf spring clip 140 comprises an intermediate curved plate part 142, an upper flat plate part 141, and a lower bent plate part 143. The upper flat plate part 141 includes an upper flat plate area 141a, a bent plate area 141b, and an upwardly inclined plate area 141c. A bent angle of the upwardly inclined plate area 141c to the upper flat plate area 141a is regulated such that: a furthest tip part 141d of the upwardly inclined plate area 141c contacts a rail bottom part when no train is passing; the furthest tip part 141d of the upwardly inclined plate area 141c contacts the rail bottom part on an outer track side of the rail when a train passes; and a ridge line part 141e of the bent plate area 141b contacts the rail bottom part on an inner track side of the rail. A rail fastening device uses the leaf spring clip.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a leaf spring clip that presses a rail toward a rail bearing body such as a concrete sleeper and a rail fastening device using the same.

Conventionally, a leaf spring is bent in a U-shape, and the lower top surface of the rail is held at its tip, and the tie plate protrusions are pressed from the top and sides at its end to secure the rail and tie plate, respectively. A spring clip having such a shape is known (see, for example, Patent Document 1).
In addition, the spring receiving seat portion that presses on both sides of the rail toward the rail installation seat surface of the concrete rail support and faces the spring clip contact surface that is the curved surface of the spring receiving seat portion. A spring clip having a contact surface is known (see, for example, Patent Document 2).

JP 52-049203 A (see page 2, column 2) Japanese Patent Laying-Open No. 2013-174087 (see paragraph 0017 and FIG. 3)

However, since the spring clip of Patent Document 1 described above has a structure in which the lower top surface of the rail is pressed by the tip head portion of the leaf spring formed by bending it into a U shape, the tip head portion of the leaf spring covers the lower top surface of the rail. The pressing force to be pressed was constant, and the rail turnback sometimes increased when passing through the train.
Moreover, the spring clip of the above-mentioned Patent Document 2 has a spring clip according to the shape of the spring clip by setting the position of the portion occupying the spring receiving seat portion side lower than the portion occupying the rail side portion of the spring clip. The elasticity of the rail is increased, and the bottom upper surface of the rail is pressed from both sides toward the rail mounting seat of the concrete rail support body, and the horizontal force (impact force) acting from the rail is applied to the spring receiving seat and the spring receiving seat. The spring clip contact surface makes it escape to the concrete rail support, and the pressing force with which the spring clip presses against the top surface of the bottom of the rail is constant, and the small return of the rail when passing through the train may be large .

  Therefore, the present invention solves the problems of the prior art as described above, and the rail is surely positioned and attached to the rail support body and is excessively applied to the rail outer rail side which tends to occur when the train passes. It is providing the leaf | plate spring clip which suppresses the rail small turn of a rail, and a rail fastening apparatus using the same.

  The invention according to claim 1 is an intermediate curved plate portion that is formed by bending a strip-shaped steel plate up and down and seated on a spring seat, and extends from the upper edge of the intermediate curved plate portion and is seated on the rail bottom of the rail. An upper flat plate portion and a lower bent plate portion that extends from a lower edge of the intermediate curved plate portion and disperses a load applied to the rail and is seated on an upper edge portion of a tie plate, A leaf spring clip that presses and holds the rail bottom of the rail toward the rail support with a fastening bolt that is fastened to the rail support in a state of being inserted into the lower bent plate, wherein the upper flat plate portion is An upper flat plate region extending in a horizontal direction from an upper end edge of the intermediate curved plate portion; a bent plate region adjacent along a tip edge of the upper flat plate region; and an upward inclined plate region extending obliquely upward from the bent plate region. The upper plate region The angle of refraction of the upward sloping plate area is such that when the train is not passing, the rail bottom and the leading edge of the upward sloping plate area are in contact on the rail outer rail side and the rail inner rail side, while the rail is on the rail outer rail side when the train passes. It is defined that the bottom and the most advanced part of the upward inclined plate area are in contact with each other, and that the rail bottom and the ridge line part of the bent plate area are in contact with each other on the rail inner rail side, thereby solving the above-mentioned problems. is there.

  In the invention according to claim 2, in addition to the configuration of the leaf spring clip according to claim 1, the lower bent plate portion extends from the lower end edge of the intermediate curved plate portion along the edge of the tie plate. A rising plate region that rises toward the upper flat plate portion, and a plate that extends from the rising edge of the rising plate region so as to have a gentle downward slope in a state of being separated from the upper flat plate portion and is seated on the convex seat portion of the tie plate By having the facing plate region, the above-described problems are further solved.

  In the invention according to claim 3, in addition to the configuration of the leaf spring clip according to claim 1 or claim 2, the rail bottom portion of the rail is a bottom portion descending continuously from the rail belly portion of the rail. The upper flat plate portion is in contact with the upward inclined plate region of the upper flat plate portion and the bottom down inclined surface of the rail bottom portion when the rail is fastened. At the same time, the above-described problem is further solved by being bent so as to come into contact with the ridge line portion of the bent plate region and the bottom gentle slope of the rail bottom.

  In the invention according to claim 4, in addition to the configuration of the leaf spring clip according to any one of claims 1 to 3, the rail support body is made of concrete. It solves the problems that have been solved.

  According to the fifth aspect of the present invention, there is provided a rail pad laid under the rail bottom of the rail, a tie plate that encloses the rail and the rail pad and distributes a load applied to the rail, and the tie plate. A pair of left and right leaf spring clips that are placed on top of the tie plate and press the rail bottom of the rail toward the flat rail mounting seat of the rail support, and the plate A pair of left and right fastening bolts that are sequentially inserted into fastening bolt insertion holes provided in a spring clip, a tie plate, and a tie plate, respectively, and fastened to the rail support body, and embedded in the rail support body and fastened. A pair of left and right embedded plugs that are respectively screwed with the bolts and the left and right ends of the rail mounting seat surface, and the leaf spring clips A rail fastening device having at least a pair of left and right spring receiving seats to hold, wherein the leaf spring clip bends a strip-shaped steel plate up and down and is seated on the spring receiving seat; and An upper flat plate portion extending from the upper end edge of the intermediate curved plate portion and seated on the rail bottom portion of the rail, and an upper edge portion of the tie plate extending from the lower end edge of the intermediate curved plate portion and distributing the load applied to the rail. The rail bottom of the rail is directed toward the rail support body by a fastening bolt that has a lower bent plate portion to be seated and is fastened to the rail support body while being inserted through the upper flat plate portion and the lower bent plate portion. The upper flat plate portion of the leaf spring clip extends horizontally from the upper edge of the intermediate curved plate portion, the bent plate region adjacent to the upper edge of the upper flat plate region, From bent plate area An upward inclined plate region extending upward, and the refraction angle of the upward inclined plate region with respect to the upper flat plate region is the maximum of the rail bottom portion and the upward inclined plate region on the rail outer rail side and the rail inner rail side when the train is not passing. While the tip is in contact, the rail bottom and the most advanced portion of the upward inclined plate region are in contact with the rail outer rail side when the train passes, and the rail bottom and the ridge line portion of the bent plate region are in contact with the rail inner rail side. By so defining, the above-described problems are further solved.

  The leaf spring clip of the present invention includes an intermediate curved plate portion that is bent up and down and seated on a spring seat, and an upper side that extends from the upper edge of the intermediate curved plate portion and sits on the rail bottom of the rail. The upper flat plate portion is composed of a flat plate portion and a lower bent plate portion that sits on the upper edge portion of the tie plate that extends from the lower end edge of the intermediate curved plate portion and disperses the load applied to the rail. Since the rail bottom of the rail is pressed and held toward the rail support body using fastening bolts that are fastened to the rail support body while being inserted through the lower bent plate, the rail is reliably positioned with respect to the rail support body. In addition to being able to be attached, the following unique effects can be achieved.

That is, according to the leaf spring clip of the invention according to claim 1, the upper flat plate-like portion is adjacent to the upper flat plate region extending in the horizontal direction from the upper end edge of the intermediate curved plate portion and the tip edge of the upper flat plate region. And an upwardly inclined plate region extending obliquely upward from the bent plate region, thereby connecting the upper inclined plate region that presses and holds the rail bottom of the rail via the bent plate region. Since the flat plate region bends and deforms when the train passes, the vibration of the leaf spring clip that tends to occur when the train passes can be absorbed and relaxed.
The refraction angle of the upward inclined plate region with respect to the upper flat plate region is such that the rail bottom and the most advanced portion of the upward inclined plate region are in contact with each other on the rail outer rail side and the rail inner rail side when the train does not pass, while the rail passes when the train passes. The rail bottom is in contact with the leading edge of the upward inclined plate area on the outer rail side, and the rail bottom and the ridge line portion of the refracting plate area are in contact on the rail inner rail side. When the wheel flange presses the rail head on the rail inner rail side and the lateral pressure toward the rail outer rail side is loaded on the rail head, the upper flat plate portion of the leaf spring clip and the rail on the rail inner rail side The spring constant of the upper flat plate portion that presses the rail bottom on the inner rail side of the rail changes from the tip of the upward inclined plate region to the ridge line portion of the bent plate region, and the spring constant of the upper flat plate portion on the rail outer rail side Press To suppress excessive rail return to the outer rail side of the rail, which tends to occur when passing through the train, because the pressing force that presses the rail bottom on the inner rail side increases. Can do.

  According to the leaf spring clip of the invention according to claim 2, in addition to the effect of the invention according to claim 1, the lower bent plate portion extends from the lower end edge of the intermediate curved plate portion along the edge of the tie plate. A rising plate region rising toward the upper flat plate portion, and a plate extending from the rising edge of the rising plate region so as to have a gentle downward slope in a state of being separated from the upper flat plate portion and seated on the convex seat portion of the tie plate By having the facing plate region, when the leaf spring clip is fastened to the rail support body by the fastening bolt, the upper side of the upper plate portion in the leaf spring clip is maintained in a state where the level of the upper plate portion is maintained. The space between the flat plate region and the plate-facing plate region of the lower bent plate portion is compressed, and the repulsion of the leaf spring clip is between the fastening bolt and the embedded stopper of the rail support body to which the fastening bolt is screwed. Power works Because, it is possible to prevent the loosening of fastening bolts due to vibration during train passage causes reliably contact the leading edge portion of the upwardly inclined plate area to the rail bottom.

  According to the leaf spring clip of the invention according to claim 3, in addition to the effect of the invention according to claim 1 or claim 2, the bottom of the rail is formed such that the bottom of the rail continuously extends from the rail abdomen of the rail. An inclined surface and a bottom gentle slope formed continuously from the bottom downward inclined surface, and the upper flat plate portion comes into contact with the upward inclined plate region of the upper flat plate portion and the bottom downward inclined surface of the rail bottom portion when the rail is fastened. By bending the ridgeline part of the bent plate area and the bottom gentle slope at the bottom of the rail, the leaf spring clip has the bottom down slope and the bottom gentle slope of the rail inner rail side and the rail outer rail side. Since the two seats are seated and pressed, the rail can be positioned and attached to the rail support more reliably.

  According to the leaf spring clip of the invention according to claim 4, in addition to the effect exerted by the invention according to any one of claims 1 to 3, the rail support body is made of concrete, The fastening bolt is firmly attached to the rail support in a state where it is inserted through the leaf spring clip, and the intermediate curved plate portion of the leaf spring clip is securely seated and held on the spring receiving base that abuts the rail support. For this reason, the upper flat plate-like portion of the leaf spring clip can suppress an excessive return of the rail toward the rail outer rail, which tends to occur when the train passes.

According to the rail fastening device of the fifth aspect of the invention, the upper flat plate portion of the leaf spring clip extends along the upper flat plate region extending in the horizontal direction from the upper end edge of the intermediate curved plate portion and the leading edge of the upper flat plate region. Adjacent bent plate regions and an upward inclined plate region extending obliquely upward from the bent plate region, the upward inclined plate region that presses and holds the rail bottom of the rail is connected via the bent plate region. Since the upper flat plate region that is present is bent and deformed when the train passes, the vibration of the leaf spring clip that tends to occur when the train passes can be absorbed and relaxed.
The refraction angle of the upward inclined plate region with respect to the upper flat plate region is such that the rail bottom and the most advanced portion of the upward inclined plate region are in contact with each other on the rail outer rail side and the rail inner rail side when the train does not pass, while the rail passes when the train passes. It is defined that the rail bottom and the leading edge of the upward inclined plate area are in contact on the outer rail side, and that the rail bottom and the ridge line portion of the bent plate area are in contact on the rail inner rail side. When the wheel flange presses the rail head on the rail inner rail side and the lateral pressure toward the rail outer rail side is loaded on the rail head, the upper flat plate portion of the leaf spring clip and the rail on the rail inner rail side The spring constant of the upper flat plate portion that presses the rail bottom on the inner rail side of the rail changes from the tip of the upward inclined plate region to the ridge line portion of the bent plate region, and the spring constant of the upper flat plate portion on the rail outer rail side Press To suppress excessive rail return to the outer rail side of the rail, which tends to occur when passing through the train, because the pressing force that presses the rail bottom on the inner rail side increases. Can do.

The perspective view which shows the outline | summary of the rail fastening apparatus which is an Example of this invention. The front view which shows the partial cross section seen from 2A-2A of FIG. The top view seen from 3B of FIG. The exploded view of the rail fastening device shown in FIG. (A) The perspective view seen from diagonally upward of the leaf | plate spring clip used in the present Example, (B) The perspective view seen from diagonally downward of the leaf | plate spring clip used in the present Example. The front view of the leaf | plate spring clip used in the present Example. (A) The figure which shows the releasing state before the rail fastening which installed the rail fastening apparatus used in the present Example, (B) Between the upward inclination board area | region of the leaf | plate spring clip in the release state before a rail fastening, and the rail bottom part of a rail Enlarged view. (A) The figure which shows the state after light rail fastening which installed the rail fastening apparatus used in the present Example, (B) Between the upward inclination board area | region of the leaf | plate spring clip in the state after light rail fastening, and the rail bottom part of a rail Enlarged view. (A) The figure which shows the state after the rail fastening which installed the rail fastening apparatus used in the present Example, (B) The enlarged view of the upward inclination board area | region of the leaf | plate spring clip after a rail fastening, and the rail bottom part of a rail. (A) The figure which shows the state which the rail turnback produced after the rail fastening which installed the rail fastening apparatus used in the present Example, (B) The upward inclination board area | region and rail of a leaf | plate spring clip in the state where the rail turnback occurred The enlarged view with the rail bottom part.

  In the present invention, a leaf spring clip used in a rail fastening device is formed by bending a strip-shaped steel plate up and down to an intermediate curved plate portion that is seated on a spring seat, and an upper end edge of the intermediate curved plate portion. It consists of an upper flat plate that sits on the bottom of the rail and a lower bent plate that sits on the upper edge of the tie plate that extends from the lower edge of the intermediate curved plate and distributes the load applied to the rail. The rail bottom of the rail is pressed and held toward the rail support by the fastening bolts that are fastened to the rail support while being inserted into the lower bent plate and the upper flat plate is the upper end of the intermediate curved plate An upper flat plate region extending horizontally from the edge, a bent plate region adjacent to the tip edge of the upper flat plate region, and an upward inclined plate region extending obliquely upward from the bent plate region; Plateau When the train is not passing, the rail bottom and the tip of the upward inclined plate area are in contact on the rail outer rail side and the rail inner rail side when the train is not passing, while the rail bottom and upward inclined plate are on the rail outer rail side when the train passes. The rail is securely positioned with respect to the rail support body because the rail bottom and the ridgeline of the bent plate area are in contact with the most advanced part of the area and the rail inner rail side on the rail inner rail side. Any specific embodiment may be used as long as it is attached and suppresses an excessive return of the rail toward the rail outer rail which tends to occur when the train passes.

  For example, for a concrete form of the rail support body to which the rail fastening device of the present invention is applied, a concrete having high strength by applying a compressive force to the concrete using a steel material in which a tensile force is applied to the concrete in advance, So-called pre-stressed concrete (PC) sleepers with embedded plugs embedded at a predetermined embedding interval, any of anti-vibration sleepers, roadbed elastic sleepers, etc. If it is a thing, there is no problem.

Furthermore, the specific form of the rail to which the rail fastening device of the present invention is applied is a so-called flat bottom rail that exhibits an inverted T-shaped rail cross section having a wide, flat bottom rail bottom with respect to the rail head. 37kg rail (rail with a weight of 37kg per meter length), 40kg rail (rail with a weight of 40kg per meter length), 50kg rail (rail with a weight of 50kg per meter length), Any rail such as a 60 kg rail having a wider bottom width (a rail having a weight of 60 kg per 1 m in length) may be used.
As for the rail cross-sectional shape of the rail, even if the rail bottom has a certain slope (bottom down slope), the rail bottom spreads from two different slopes, that is, the rail abdomen. Rail bottom part which consists of two inclined surfaces of the 1st inclined surface (bottom down inclined surface) continuously formed in the shape and the 2nd inclined surface (bottom gentle slope) continuously formed from this 1st inclined surface (bottom down inclined surface) It may have a top surface.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, the rail fastening device 100 according to an embodiment of the present invention uses a leaf spring clip 140 that presses the rail R toward the rail support S, so that the rail R is supported by the rail support S. It will be described below in detail.

  In addition, about the concrete rail form of the rail R applied to the rail fastening apparatus 100 of a present Example, as shown in FIG. 2, the wide T-shaped rail cross section provided with the rail bottom part R1 of a flat bottom is exhibited. The bottom portion of the rail R having a weight 50 kg per 1 m, the bottom portion R1 of the rail R being formed continuously from the rail abdomen R2 of the rail R in a divergent form, and the bottom portion of the bottom portion R1aa. The target is the one provided with the rail bottom upper surface R1a composed of two inclined surfaces with the gentle inclined surface R1ab.

  Moreover, about the rail support body S applied to the rail fastening apparatus 100 of a present Example, it is located in the bottom face of the recessed part formed in the top surface S1 of this rail support body S, and this top surface S1. A rail installation seat surface S2 for laying the rail R and an inner end wall surface S3 rising continuously from both ends of the rail installation seat surface S2 are provided, and a tensile force is applied to the concrete in advance. The object is a sleeper made of so-called prestressed concrete (PC), which is made of high-strength concrete by applying a compressive force to the concrete using the steel material.

  As shown in FIGS. 1 to 4, the rail fastening device 100 according to one embodiment of the present invention includes a rail pad 110, a tie plate 120, a tie plate pad 130, a leaf spring clip 140, and a fastening bolt 150. And a basic structure for fastening the rail by a combination of the embedded plug 160 and the spring receiving base 170, and these components will be described below.

First, the rail pad 110 described above is laid over at least the entire width of the rail bottom portion R1 of the rail R to elastically absorb the vibration of the rail R, and compressive deformation occurs on the rail outer rail side when passing through the train, resulting in the outside of the rail. The rail is allowed to return to the side of the rail, and is composed of a rubber rectangular pad.
Regarding the rubber material of the rail pad 110, any rubber material can be used as long as it is a synthetic rubber such as styrene butadiene rubber (SBR), chloroprene rubber (CR), urethane rubber (U), or an elastic material such as natural rubber (NR). It does not matter.

The tie plate 120 used in the rail fastening device 100 of the present embodiment disperses the load applied to the rail R by engaging the rail R and the rail pad 110 and fastens to the rail support S with the fastening bolt 150. It is fixed, and is composed of a cast product.
Further, as shown in FIG. 4, the tie plate 120 includes a pair of protrusions 122 and 122 having a trapezoidal cross section with an inner surface being a flat surface and an outer surface being an inclined surface, and the pair of protrusions 122 and 122. The pair of protrusions 122 and 122 are formed on the upper surface, and the leaf spring clip 140 presses the rail R in the middle portion of the upper surface. In this case, an upper surface recess longer than the width of the leaf spring clip 140 is formed so as not to contact the upper surface of the protrusion and prevent the rail R from being pressed, and an outer surface recess is formed at an intermediate portion of the outer surface. , 122 is provided with a fastening bolt insertion hole 121 at each outer center, and a pair of mountain-shaped convex seating portions 123, 123 are provided on both sides of the fastening bolt insertion hole 121.

Furthermore, the tie plate pad 130 overlaps with the tie plate 120 placed thereon, and elastically absorbs the vibration of the rail R. When the train passes, the tie plate pad 130 is compressed and deformed on the rail outer rail side, and the rail toward the rail outer rail side is generated. A small return is allowed in cooperation with the rail pad 110, and is composed of a rubber rectangular pad.
As for the rubber material of the tie plate pad 130, as with the rail pad 110, synthetic rubber such as styrene butadiene rubber (SBR), chloroprene rubber (CR), urethane rubber (U), natural rubber (NR), etc. Any elastic material can be used.

The fastening bolts 150 used in the rail fastening device 100 of the present embodiment are sequentially inserted into fastening bolt insertion holes 141h, 143h, 121, 131 provided in the leaf spring clip 140, the tie plate 120, and the tie plate pad 130, respectively. In order to fasten the rail R to the rail support S and fix the rail R from the left and right, a pair of left and right is arranged with respect to the rail R.
Needless to say, the fastening bolt 150 is screwed to the embedded plug 160 using a spring washer 151 and a flat washer 152.

  The embedded plugs 160 used in the rail fastening device 100 of the present embodiment are arranged in a pair of left and right with respect to the rail R so as to be screwed to the pair of right and left fastening bolts 150, and are used for rail installation of the rail support S. It is embedded in the seating surface S2.

  The spring receiving base 170 used in the rail fastening device 100 of the present embodiment is disposed at each of the left and right ends of the rail mounting seat surface S2 of the rail support S to hold the intermediate curved plate portion 142 of the leaf spring clip 140. For this purpose, a pair of left and right rails R are arranged.

Next, the leaf spring clip 140 that is the most characteristic of the rail fastening device 100 of the present embodiment will be described in more detail.
The leaf spring clip 140 used in the rail fastening device 100 of this embodiment is seated on a spring receiving base 170 by bending a strip-shaped steel plate up and down as shown in FIGS. 1, 2, 4 to 6. The intermediate curved plate portion 142, the upper flat plate portion 141 extending from the upper end edge 142a of the intermediate curved plate portion 142 and seated on the rail bottom portion R1 of the rail R, and the rail R extending from the lower end edge 142b of the intermediate curved plate portion 142 Plate plate 143 having a lower bent plate portion 143 seated on the upper edge portion of the tie plate 120 that disperses the load applied to the upper and lower plates, and having an upper and lower bifurcated structure comprising an upper flat plate portion 141 and a lower bent plate portion 143. Presents a body.
Accordingly, the leaf spring clip 140 is arranged in a pair on the left and right with respect to the rail R and is placed on the upper side of the tie plate 120 and is inserted into the upper flat plate portion 141 and the lower bent plate portion 143 in the rail support. Since the fastening bolt 150 to be fastened to the body S presses and holds the rail bottom R1 of the rail R toward the rail support S, the leaf spring clip 140 faces the flat rail installation seat S2 of the rail support S. Thus, the rail R can be securely positioned and attached to the rail support S by pressing the rail bottom upper surface R1a of the rail bottom R1 of the rail R from the left and right.

Further, the upper flat plate portion 141 of the leaf spring clip 140 includes an upper flat plate region 141a extending in the horizontal direction from the upper end edge 142a of the intermediate curved plate portion 142 and an adjacent bent plate region 141b along the tip edge of the upper flat plate region 141a. And an upward inclined plate region 141c extending obliquely upward from the bent plate region 141b.
Thus, the upper flat plate region 141a connected to the upward inclined plate region 141c that presses and holds the rail bottom R1 of the rail R via the bent plate region 141b is bent and deformed when the train passes.

The refraction angle of the upward inclined plate region 141c with respect to the upper flat plate region 141a of the upper flat plate portion 141 described above is the maximum of the rail bottom R1 and the upward inclined plate region 141c on the rail outer rail side and the rail inner rail side when the train is not passing. While the most advanced portion 141d located on the lower side of the tip is in contact, the rail bottom R1 and the most advanced portion 141d of the upward inclined plate region 141c are in contact with each other on the rail outer rail side and the rail on the rail inner rail side when the train passes. It is defined that the bottom portion R1 and the ridge line portion 141e located below the bent plate region 141b are in contact with each other.
Accordingly, when the wheel flange portion of the passing train presses the rail head portion R3 on the rail inner rail side and the lateral pressure toward the rail outer rail side is loaded on the rail head portion R3, the upper side of the leaf spring clip 140 The contact between the flat plate portion 141 and the rail bottom portion R1 on the rail inner rail side is transferred from the most distal portion 141d of the upward inclined plate region 141c to the ridge line portion 141e of the bent plate region 141b, and the rail bottom portion R1 on the rail inner rail side. Is higher than the spring constant of the upper flat plate portion 141 that presses the rail bottom portion R1 on the rail outer rail side.
Further, the upward inclined plate region 141c of the leaf spring clip 140 follows the inclination of the rail head portion R3 with respect to the small rail return that occurs when the train passes through the train, and suppresses the excessive rail small return. The occurrence of the corrugated rail wear that causes the rail tread of the rail head R3 to wear away during the running is suppressed.

  The upper flat plate portion 141 of the leaf spring clip 140 includes a fastening bolt insertion hole 141h through which the fastening bolt 150 is inserted into the upper flat plate region 141a.

On the other hand, the lower bent plate portion 143 of the leaf spring clip 140 and the rising plate region 143a rising from the lower end edge 142b of the intermediate curved plate portion 142 along the end edge of the tie plate 120 toward the upper flat plate portion 141 and the rising plate region 143a. A convex seat 123 formed on the upper surface of the tie plate 120 that extends linearly toward the tip of the plate region 143a so as to have a gentle downward slope when separated from the rising edge 143b of the plate region 143a. A plate-facing plate region 143c to be seated is provided, and the plate-facing plate region 143c is branched into two toward the tip, and is connected as a fastening bolt insertion hole through which the fastening bolt 150 can be inserted. Bolt avoidance slit 143h is formed, and when the leaf spring clip 140 is attached, the branch portion of the plate facing plate region 143c is the type Respectively on the top surface of the convex seat 123 formed on the upper surface of the over bets 120 abuts.
Thus, when the leaf spring clip 140 is fastened to the rail support S by the fastening bolt 150, the upper flat plate region of the upper flat plate portion 141 in the flat spring clip 140 is maintained in a state where the horizontality of the upper flat plate portion 141 is maintained. 141a and the plate-facing plate region 143c of the lower bent plate portion 143 are pressed and contracted, so that the fastening bolt 150 and the embedded plug 160 of the rail support S to which the fastening bolt 150 is screwed are inserted. The repulsive force of the leaf spring clip 140 will work.
In addition, about the material of the steel plate used for the leaf | plate spring clip 140, as long as it is spring steel materials, such as a silicon manganese steel material, a manganese chromium steel material, and a chromium vanadium steel material, what kind of thing may be used.

Next, the installation state of one Example of this invention is demonstrated based on drawing.
When the rail fastening device 100 is installed on the rail support S, as shown in FIGS. 7A and 7B, the lower bent plate portion 143 is in a released state before fastening the fastening bolt 150. The plate facing plate region 143c has a gentle downward slope, and the lower surface of the plate facing plate region 143c is seated on the convex seating portion 123 provided in the vicinity of the upper end of the tie plate 120. The lower surface of the portion 141 and the rail bottom upper surface R1a of the rail bottom R1 are separated from each other and are in a non-contact state.
Next, the fastening bolt 150 is sequentially inserted into the fastening bolt insertion holes 141h, 143h, 121, 131 provided in the leaf spring clip 140, the tie plate 120, and the tie plate pad 130, respectively. The screwing with 160 is advanced.

  When the fastening force of the fastening bolt 150 is lightly fastened to about 12 to 13% of the tightening regulation, the leaf spring clip 140 as shown by the leaf spring clip 140 in FIGS. 8A and 8B. Only the foremost portion 141d is in contact with the bottom downward inclined surface R1aa of the rail bottom upper surface R1a, and the ridge line portion 141e floats from the bottom gentle slope R1ab of the rail bottom upper surface R1a.

After that, when the fastening bolt 150 is fastened to a predetermined fastening force, as shown in FIGS. 9A and 9B, the upper flat plate portion 141 of the leaf spring clip 140 is bent and formed. The edge portion 141d located on the lower side of the bent plate region 141b is in contact with the leading edge portion 141d located on the lower side of the upward inclined plate region 141c of the upper flat plate portion 141 and the bottom downward inclined surface R1aa of the rail bottom portion R1. 141e and the bottom gentle slope R1ab of the rail bottom R1 come into contact with each other.
As a result, the leaf spring clip 140 is seated and pressed at two locations of the bottom downward slope R1aa and the bottom gentle slope R1ab on the rail inner rail side and the rail outer rail side.
Even when the ridge line portion 141e of the leaf spring clip 140 is slightly separated from the bottom gentle slope R1ab of the rail bottom top surface R1a of the rail bottom portion R1, when the fastening bolt 150 is fastened to a predetermined fastening force, for example, When the lateral pressure acts on the inner rail side and a small turn of the rail occurs, the ridge line portion 141e of the leaf spring clip 140 provided on the inner rail side may be in contact with the bottom gentle slope R1ab of the rail bottom upper surface R1a. .

Then, as shown in FIG. 10, when lateral pressure is applied to the inner rail side of the rail to cause a small return of the rail, when the amount of small return increases, the outer rail side of the rail pad 110 is pressed and sinks, and the rail pad The rail inner rail side of 110 becomes slightly floating.
Further, the foremost portion 141d of the leaf spring clip 140 on the rail inner rail side is separated from the bottom downward inclined surface R1aa of the rail bottom surface R1a, and only the ridge portion 141e of the leaf spring clip 140 is the bottom gentle slope of the rail bottom surface R1a. The rail bottom R1 is pressed and held toward the rail support S in contact with R1ab.

At this time, the ridge line portion 141e of the leaf spring clip 140 on the rail outer rail side is separated from the bottom gentle slope R1ab of the rail bottom top surface R1a, and only the most distal portion 141d of the leaf spring clip 140 is a bottom downward slope of the rail bottom top surface R1a. The rail bottom R1 is pressed and held toward the rail support S in contact with the surface R1aa.
Here, the pressing force of the leaf spring clip 140 is such that the spring constant of the ridge portion 141e of the leaf spring clip 140 is larger than the spring constant of the most distal portion 141d of the leaf spring clip 140. The pressing force to R1 increases, and the excessive rail return to the rail outer rail side is suppressed.

  In the rail fastening device of the present embodiment thus obtained, the upper flat plate portion 141 of the leaf spring clip 140 has an upper flat plate region 141a extending horizontally from the upper end edge 142a of the intermediate curved plate portion 142 and the upper flat plate. The leaf spring clip 140 that tends to be raised when passing a train by having the bent plate region 141b adjacent to the tip end of the region 141a and the upward inclined plate region 141c extending obliquely upward from the bent plate region 141b. Can be absorbed and relaxed.

  The refraction angle of the upward inclined plate region 141c with respect to the upper flat plate region 141a is such that the rail bottom R1 and the most distal portion 141d of the upward inclined plate region 141c are in contact with each other on the rail outer rail side and the rail inner rail side when the train does not pass. Thus, when the train passes, the rail bottom portion R1 and the most distal portion 141d of the upward inclined plate region 141c are in contact with each other on the rail outer rail side, and the rail bottom portion R1 and the ridge portion 141e of the bent plate region 141b are in contact with each other on the rail inner rail side. Therefore, it is possible to suppress an excessive return of the rail to the rail outer rail side that tends to occur when the train passes.

In addition, the lower bent plate portion 143 rises from the lower end edge 142b of the intermediate curved plate portion 142 toward the upper flat plate portion 141 along the end edge of the tie plate 120, and the rising plate region 143a rises. By having a plate facing plate region 143c extending from the edge 143b so as to have a gentle downward slope in a state of being separated from the upper flat plate portion 141, the plate facing plate region 143c is seated on the convex seating portion 123 of the tie plate 120. It is possible to reliably bring the foremost portion 141d of the plate region 141c into contact with the rail bottom portion R1 and to prevent the fastening bolt 150 from loosening due to vibration when passing through the train.
The rail bottom portion R1 of the rail R includes a bottom downward inclined surface R1aa formed continuously from the rail abdominal portion R2 of the rail R and a bottom gentle inclined surface R1ab continuously formed from the bottom downward inclined surface R1aa. The portion 141 is in contact with the upward inclined plate region 141c of the upper flat plate portion 141 and the bottom downward inclined surface R1aa of the rail bottom portion R1 when the rail is fastened, and the ridgeline portion 141e of the bent plate region 141b and the bottom gentle slope R1ab of the rail bottom portion R1. And the rail R can be positioned and attached to the rail support S more reliably.

  In addition, since the rail support body S is made of concrete, the fastening bolt 150 is firmly attached to the rail support body S in a state where the fastening bolt 150 is inserted into the plate spring clip 140, so that the intermediate curved plate of the plate spring clip 140 is attached. Since the portion 142 is securely seated and held on the spring support base 170 that abuts on the rail support S, the upper flat plate portion 141 of the leaf spring clip 140 moves toward the rail outer rail side that tends to occur when the train passes. The effect is enormous, such as being able to suppress excessive rail turnover.

  In the rail fastening device of this embodiment, a height adjustment packing is inserted between the tie plate 130 and the spring receiving seats 170, 170 and the rail installation seat surface S2, and the tie plate is inserted into the height adjustment packing. A configuration may be adopted in which the height can be adjusted by seating the pad 130 and the spring receiving seat 170 in a juxtaposed state. When such a height adjustment packing is used in combination, a rail corrugation generated in the rail R is possible. After the wear is removed by rail correction, the tie plate pad 130 and the spring receiving base 170 that abut against the leaf spring clip 140 are simultaneously lifted along the fastening bolt 150 by the thickness of the height adjustment packing to adjust the height. Even if the rail R is raised by packing, the pressing posture of the leaf spring clip 140 that contacts the rail R is more reliably maintained. The effect is more more serious.

DESCRIPTION OF SYMBOLS 100 ... Rail fastening apparatus 110 ... Rail pad 120 ... Tie plate 121 ... Fastening bolt insertion hole 122 ... Projection part 123 ... Convex seat part 130 ... Tie plate pad 131 ··· Fastening bolt insertion hole 140 ··· Leaf spring clip 141 ··· Upper plate portion 141a ···· Upper plate region 141b · · Bending plate region 141c · · Upward inclined plate region 141d · · · Most advanced portion 141e · Ridge line portion 141h fastening bolt insertion hole 142 intermediate curved plate 142a upper edge 142b lower edge 143 lower bent plate 143a rising plate region 143b rising edge 143c .. Plate facing plate region 143h .. Fastening bolt avoidance slit (fastening bolt insertion hole)
150 ・ ・ ・ Fastening bolt 151 ・ ・ ・ Spring washer (spring washer)
152 ... Flat washers (flat washers)
160... Embedded plug 170... Spring receiving seat R... Rail R1... Rail bottom surface R1a .. Rail bottom top surface R1aa. Bottom down slope R1ab. Bottom gentle slope R2.・ ・ ・ Rail head S ・ ・ ・ Rail support S1 ・ ・ ・ Top surface S2 ・ ・ ・ Rail installation seat S3 ・ ・ ・ Inner end wall

Claims (5)

An intermediate curved plate portion that is bent vertically on a strip-shaped steel plate and is seated on a spring seat, an upper flat plate portion that extends from the upper edge of the intermediate curved plate portion and is seated on the rail bottom of the rail, and the intermediate curved portion The lower bent plate portion that extends from the lower end edge of the plate portion and disperses the load applied to the rail is seated on the upper edge portion of the tie plate, and is inserted through the upper flat plate portion and the lower bent plate portion. A leaf spring clip that presses and holds the rail bottom of the rail toward the rail support body with a fastening bolt that is fastened to the rail support body in a state,
The upper flat plate portion extends upward from the upper edge of the intermediate curved plate portion in the horizontal direction, the bent plate region adjacent to the upper edge of the upper flat plate region, and the diagonally upward from the bent plate region. An inclined plate region,
The angle of refraction of the upward inclined plate region with respect to the upper flat plate region is such that the rail bottom and the most advanced portion of the upward inclined plate region are in contact with each other on the rail outer rail side and the rail inner rail side when the train is not passing, while the rail is out of the rail when passing the train. A leaf spring characterized in that the rail bottom is in contact with the tip of the upward inclined plate region on the rail side, and the rail bottom and the ridge line portion of the bent plate region are in contact on the rail inner rail side. clip.   The lower bent plate portion rises from the lower edge of the intermediate curved plate portion toward the upper flat plate portion along the tie plate edge, and the upper flat plate portion from the rising edge of the rising plate region. 2. A leaf spring clip according to claim 1, further comprising a plate-facing plate region extending so as to have a gentle downward slope in a released state and seated on a convex seating portion of the tie plate. The rail bottom portion of the rail comprises a bottom downward slope formed continuously from the rail abdomen of the rail and a bottom gentle slope continuously formed from the bottom downward slope,
The upper flat plate-shaped portion is in contact with the upward inclined plate region of the upper flat plate portion and the bottom downward inclined surface of the rail bottom portion and at the ridge line portion of the bent plate region and the bottom gentle slope of the rail bottom portion when the rail is fastened. The leaf spring clip according to claim 1, wherein the leaf spring clip is bent.   The leaf spring clip according to any one of claims 1 to 3, wherein the rail support is made of concrete. A rail pad laid on the lower side of the rail bottom of the rail, a tie plate that encloses the rail and the rail pad and distributes the load applied to the rail, and a tie plate pad on which the tie plate is placed and overlapped, A pair of left and right leaf spring clips that are placed on the upper side of the tie plate and press the rail bottom of the rail toward the flat rail installation seat of the rail support, the leaf spring clip, the tie plate, and the tie plate pad A pair of left and right fastening bolts that are sequentially inserted into fastening bolt insertion holes provided respectively on the rail and the rail is fastened to the rail support body, and a left and right pair that is embedded in the rail support body and screwed to the fastening bolt. And a pair of left and right spring holders for holding the leaf spring clip respectively disposed at the left and right end portions of the rail mounting seat surface. And at least the rail fastening device comprising a seat base,
The leaf spring clip is formed by bending a strip-shaped steel plate up and down to be seated on a spring seat, and an upper plate shape extending from the upper edge of the middle curve plate and seated on the rail bottom of the rail. And an upper bent portion and a lower bent portion having a lower bent plate portion that extends from a lower end edge of the intermediate curved plate portion and disperses a load applied to the rail, and is seated on an upper edge portion of the tie plate. The rail bottom of the rail is pressed and held toward the rail support body by a fastening bolt that is fastened to the rail support body in a state of being inserted into the plate portion,
The upper flat plate portion of the leaf spring clip is inclined from the upper plate region extending in the horizontal direction from the upper edge of the intermediate curved plate portion, the bent plate region adjacent to the tip edge of the upper flat plate region, and the bent plate region. An upwardly inclined plate region extending upward,
The angle of refraction of the upward inclined plate region with respect to the upper flat plate region is such that the rail bottom and the most advanced portion of the upward inclined plate region are in contact with each other on the rail outer rail side and the rail inner rail side when the train is not passing, while the rail is out of the rail when passing the train. Rail fastening characterized in that the rail bottom and the leading edge of the upward inclined plate region are in contact with each other on the rail side, and the rail bottom and the ridge portion of the bent plate region are in contact on the rail inner rail side. apparatus.