JP2017223041A - Track skeleton buckling prevention device and installation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a track skeleton buckling prevention device and an installation method thereof, which enables installation without digging up crushed stones around a sleeper, thereby eliminating a restriction regarding a time period for installation and saves labor in the installation work, and furthermore reducing variations in lateral resistance force on a track bed by fixing the device firmly on the sleeper using a fastener for a sleeper fixing frame.SOLUTION: A track skeleton buckling prevention device 1 includes: a sleeper fixing frame 100 having a top cover part 110 in surface-contact with an edge part of a top surface of a sleeper 10 and a protruded part 120 connected to the top cover part 110 and covering a top part of an edge surface of the sleeper 10; and a pointed driving pile 200 fitted on the protruded part 120 of the sleeper fixing frame 100 and restrained by a crushed stone supporting the sleeper 10. The sleeper fixing frame 100 has an insertion hole 111 for a fastener for the sleeper fixing frame that penetrates through the top cover part 110. The protruded part 120 of the sleeper fixing frame 100 has an insertion hole 121 for the pointed driving pile that penetrates through the protruded part 120.SELECTED DRAWING: Figure 3

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail movement prevention device used on a railway track, and more particularly, to a maintenance-saving type rail buckling prevention device.

  Rails laid on railways may undergo rapid lateral deformation (buckling of the track) due to an increase in axial pressure accompanying the temperature rise of the rails at high temperatures such as in summer. A rail consisting of a rail and a sleeper generates resistance against the roadbed by compacting the periphery of the sleeper with crushed stone. The resistance force in the longitudinal direction of the sleeper is particularly referred to as the roadbed lateral resistance force.

  In particular, when a long rail is used in a sharply curved section with a small radius of curvature, the lateral resistance of the road bed is insufficient and the risk of buckling increases. As a countermeasure work to prevent buckling, a buckling prevention plate may be installed at the end of the sleeper. As an example, a buckling prevention plate is disclosed in which a device in which a bearing plate is welded to a steel frame is installed in a sleeper with engagement by frictional force (Patent Document 1). This buckling prevention plate adds the resistance force of the bearing plate to the lateral resistance force of the sleeper bed.

  On the other hand, instead of the welded bearing plate, a buckling prevention device is disclosed in which a pile plate is inserted and pressed into a member that clamps and fixes a sleeper from above and below (Patent Document 2). This buckling prevention device has an advantage that the pile plate can be inserted after the member for holding and fixing the sleeper from above and below is installed, and the depth of the pile plate can be adjusted.

Japanese Utility Model Publication No. 07-044529 JP 2010-229642 A

  In order to install buckling prevention plates and buckling prevention devices that require a frame or a member that clamps and fixes the sleepers from above and below, it is necessary to dig up crushed stones around the sleepers and to install them continuously. However, there is a problem in that the use of heavy machinery or a large number of workers is required, which increases labor.

  Further, the conventional buckling prevention plate and the buckling prevention device may cause variations in the lateral resistance of the road bed to be exhibited. The buckling prevention plate and the buckling prevention device that require a frame or a member that clamps and fixes the sleeper from above and below are structured to engage with the sleeper by a frictional force that tends to vary, and the variation in the frictional force is the roadbed. It affects the variation in lateral resistance. Furthermore, in the buckling prevention device that is inserted through the pile plate and press-fitted, a gap generated between the end of the sleeper and the buckling prevention plate affects the variation in the lateral resistance of the road bed. The gap between the sleeper end and the buckling prevention plate is generated when the rail is moved laterally in the track maintenance work by the multiple tie tamper when the pile plate is inserted and press-fitted. Buckling is likely to occur at the portion where the lateral resistance force is the smallest. Therefore, the buckling prevention plate and the buckling prevention device are required to have a small variation as well as the magnitude of the added lateral resistance force.

  Furthermore, since the lateral resistance of the bed is reduced by temporarily removing crushed stones around the sleeper, there is a problem that the work is restricted in summer when the temperature is high and it is difficult to install a buckling prevention plate. .

  Therefore, the present invention makes it possible to install without digging up the crushed stones around the sleeper, thereby removing the restrictions on the time of installation and saving labor for the installation. It is an object of the present invention to provide a rail buckling prevention device and a method for installing the same that can reduce variations in lateral resistance of the road bed by firmly fixing to the sleeper with a fastener.

  That is, the present invention is to achieve the above-described object, and the means of claim 1 is the rail buckling prevention device according to the present invention, in which the upper lid portion that abuts the upper end of the sleeper with a surface; A sleeper fixing frame that is connected to the upper lid and covers the upper part of the end surface of the sleeper, and is attached to the protrusion of the sleeper fixation frame and is restrained by a crushed stone that supports the sleeper. The sleeper fixing frame has a fastener fixing hole for a sleeper fixing frame that passes through the upper lid portion, and the protruding end portion of the sleeper fixing frame passes through the protruding end portion. It has a driving arrow insertion slot.

  According to a second aspect of the present invention, the sleeper fixing frame is bent from the upper lid portion, and is bent from the left side wall portion covering the upper portion of the left side surface of the sleeper, the upper lid portion, and the right side surface of the sleeper. And a right side wall portion covering the upper portion.

  According to a third aspect of the present invention, the left side wall portion is in contact with the left side surface of the sleeper, and the right side wall portion is in contact with the right side surface of the sleeper.

  According to a fourth aspect of the present invention, the sleeper fixing frame includes a thick plate portion protruding from the upper lid portion, and the sleeper fixing frame fastening tool insertion hole vertically connects the upper lid portion and the thick plate portion. It penetrates in the direction.

  According to a fifth aspect of the present invention, the driving arrow insertion port includes an inclined surface that guides the driving arrow in the sleeper direction.

  According to a sixth aspect of the present invention, there is provided a method for installing the rail buckling prevention device, wherein the sleeper fixing frame fastener is inserted into the sleeper fixing frame fastener insertion hole and the hole of the sleeper. Then, the sleeper fixing frame is fixed to the sleeper.

  According to a seventh aspect of the present invention, the sleeper fixing frame fastener is an anchor bolt.

  With the configuration of claim 1, the rail buckling prevention device of the present invention is a maintenance-saving device that can be installed without disturbing the roadbed, but adds a lateral resistance to the roadbed with performance equal to or higher than that of the conventional product. This has the effect of not hindering the work of correcting the position of the trajectory.

  Further, according to the configuration of claim 2, the rail buckling prevention device according to the present invention can be positioned easily when attaching the sleeper fixing frame to the sleeper, and has a certain versatility with respect to various sleeper shapes. There is an effect of having.

  According to the third aspect of the present invention, the rail buckling prevention device of the present invention can be easily attached at an accurate position in accordance with the shape of the sleeper when the sleeper fixing frame is attached to the sleeper. There is.

  According to the fourth aspect of the present invention, the rail buckling prevention device of the present invention has an effect of being able to guide the bit of the drilling machine as a jig when the pilot hole is drilled.

  According to the fifth aspect of the present invention, the rail buckling prevention device of the present invention has the effect of minimizing the gap between the driving arrow and the sleeper, reducing the variation in lateral resistance of the road bed, and the driving arrow is simple. There is an effect of obtaining a stronger resistance to the lateral side of the road than when driven vertically.

  Further, according to the configuration of claim 6 or 7, the installation method of the rail buckling prevention device according to the present invention provides strong and stable tightening by directly tightening the sleeper fixing frame and the sleeper. This has the effect of reducing variations in resistance.

It is a perspective view which shows the installation state of the rail buckling prevention apparatus of this invention in an Example. It is the perspective view which looked up at the rail buckling prevention apparatus of this invention in an Example from the downward direction. It is a perspective view which shows the installation method of the rail buckling prevention apparatus of this invention in an Example. It is a right view of the rail buckling prevention apparatus of this invention in an Example.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing about the rail buckling prevention apparatus of this invention and its installation method is demonstrated according to drawing.
In the following drawings, crushed stones are not shown.

FIG. 1 is a perspective view of the rail buckling prevention device 1 and shows an installation state of the rail buckling prevention device 1.
The rail buckling prevention device 1 includes a sleeper fixing frame 100 and a driving arrow 200.
The sleeper fixing frame 100 includes an upper lid part 110 that is in contact with the end of the upper surface of the sleeper 10 with a surface, and a protruding end part 120 that is connected to the upper lid part 110 and covers the upper part of the end surface of the sleeper 10.

FIG. 2 is a perspective view of the rail buckling prevention device 1 as seen from below, and shows the lower surface of the sleeper fixing frame 100.
The sleeper fixing frame 100 is bent from the upper lid part 110 and covers a left side wall part 130 that covers the upper part of the left side surface of the sleeper 10, and a right side wall part that is bent from the upper lid part 110 and covers the upper part of the right side surface of the sleeper 10. 140. Further, it is more preferable that the left side wall portion 130 abuts the left side surface of the sleeper 10 and the right side wall portion 140 abuts the right side surface of the sleeper 10 together.

The sleeper fixing frame 100 includes the left side wall portion 130 and the right side wall portion 140, so that when the sleeper fixing frame 100 is attached to the sleeper 10, positioning is easy, but various shapes of the sleeper 10 can be used. And has a certain versatility.
Further, when the left side wall 130 is in contact with the left side of the sleeper 10 and the right side wall 140 is in contact with the right side of the sleeper 10 with a surface, when attaching the sleeper fixing frame 100 to the sleeper 10, There is an effect that it is easy to fit the shape of the sleeper 10 at an accurate position.

The driving arrow 200 is attached to the projecting end portion 120 of the sleeper fixing frame 100 and is restrained by a crushed stone that supports the sleeper 10.
The rail buckling prevention device 1 uses a tightening tool to fix the sleeper fixing frame 100 to the sleeper 10 and to fix the driving arrow 200 to the sleeper fixing frame 100.

Here, the material of the sleeper fixing frame 100 and the driving arrow 200 is not limited, but since the strength is required, the sleeper fixing frame 100 and the driving arrow 200 are preferably made of steel.
Moreover, although the material of the sleeper 10 is not limited, the sleeper 10 of a present Example is a product made from concrete.

The sleeper fixing frame fastener 20 used for fixing the sleeper fixing frame 100 and the sleeper 10 is not limited, but is preferably an anchor bolt by a post-installed anchor method. Moreover, since the strength of the sleeper fixing frame fastener 20 is required, it is more preferable to use an adhesive anchor bolt.
In addition, although an anchor bolt is not limited to concrete use, the thing suitable for the material of the sleeper 10 should be used. The sleeper fixing frame tightening tool 20 may be a hexagon bolt using an embedded plug provided in the sleeper 10 in advance. The sleeper fixing frame tightening tool 20 of the present embodiment is an anchor bolt. In this embodiment, the sleeper 10 is provided with a pilot hole for using a fastener.

  The driving arrow bolt 30 used for fixing the driving arrow 200 and the sleeper fixing frame 100 is not limited. However, considering the protection and stability of the seating surface and the ease of tightening, a hexagon bolt with a built-in washer should be used. Is preferred.

FIG. 3 is a perspective view of the rail buckling prevention device 1 and shows an installation method of the rail buckling prevention device 1.
The sleeper fixing frame 100 has a sleeper fixing frame fastening tool insertion hole 111 that passes through the upper lid portion 110, and the protruding end portion 120 of the sleeper fixing frame 100 has a driving arrow insertion port 121 that passes through the protruding end portion 120. Have.

  The sleeper fixing frame 100 preferably includes a thick plate portion 112 protruding from the upper lid portion 110, and the sleeper fixing frame fastening tool insertion hole 111 penetrates the upper lid portion 110 and the thick plate portion 112 in the vertical direction.

  By securing the strength and depth of the sleeper fixing frame fastening tool insertion hole 111 in the vertical direction through the upper lid portion 110 and the thick plate portion 112, the rail buckling prevention device 1 can be used as a jig. When making a pilot hole in the sleeper 10, there is an effect that the bit of the drilling machine can be guided.

  Further, the projecting end portion 120 of the sleeper fixing frame 100 has a driving arrow fastening tool insertion hole 122 penetrating in a horizontal direction from the front surface to the driving arrow insertion port 121, and the driving arrow 200 is provided in the upper center in the horizontal direction. The screw insertion hole 210 is provided.

  Here, although the shape of the driving tool insertion hole 122 for the driving arrow is not limited, it is preferable to make it a long hole that is wide in the vertical direction so that the depth of the driving arrow 200 can be adjusted. Further, the inner surface of the screw insertion hole 210 of this embodiment is threaded by a tap.

FIG. 4 is a right side view of the rail buckling prevention device 1 and shows a state where the driving arrow 200 is press-fitted into the crushed stone and screwed.
The driving arrow 200 hits the flat portion 220 and press-fits into the crushed stone. However, since the projecting end portion 120 of the sleeper fixing frame 100 is located at the upper part of the sleeper 10, if the driving arrow 200 is pressed into the vertical direction, Without being driven, the driving arrow 200 may leave the end of the sleeper 10. When the gap between the driving arrow 200 and the sleeper 10 increases, the lateral resistance of the road bed varies.

Therefore, the driving arrow insertion port 121 preferably includes an inclined surface 123 that guides the driving arrow 200 in the direction of the sleeper 10.
By setting the driving arrow insertion port 121 to have such a wedge shape, the driving arrow 200 can be guided so that the sharpened portion 230 of the driving arrow 200 is close to the end face of the sleeper 10. When the driving arrow bolt 30 is fastened to the driving arrow 200 inserted obliquely through the driving arrow tightening tool insertion hole 122 and the screw insertion hole 210, the driving arrow 200 is inclined while approaching the end face of the sleeper 10. Eliminate and try to be vertical. At this time, the pressure that the driving arrow 200 receives from the crushed stone on the outside is the addition of the lateral resistance of the road bed. In addition, the space | interval of the driving arrow 200 and the sleeper 10 should just be constant, and may be contacting.

  By providing the driving arrow insertion port 121 with the inclined surface 123, the rail buckling prevention device 1 of the present invention minimizes the gap between the driving arrow 200 and the sleeper 10 and reduces variations in the lateral resistance of the road bed. In addition to the effect, there is an effect of obtaining a stronger lateral resistance force than the driving arrow 200 is simply driven vertically.

  Further, in the rail buckling prevention device 1, only the press-fitted driving arrow 200 is restricted by crushed stone, and the sleeper fixing frame 100 fixed to the sleeper 10 is outside the crushed stone. Therefore, the rail buckling prevention device 1 has an effect that the trajectory can be corrected while the sleeper fixing frame 100 is attached only by removing the driving arrow 200 that is screwed.

  Hereinafter, the installation method of a rail buckling prevention apparatus is demonstrated.

  First, a hole for inserting the sleeper fixing frame fastening tool 20 is provided on the upper surface of the sleeper 10 using a punch. In this embodiment, the sleeper fixing frame 100 can be a jig for making a pilot hole in the sleeper 10. After making a pilot hole in the sleeper 10, a main hole is provided.

  Next, the sleeper fixing frame tightening tool 20 is inserted into the holes of the sleeper fixing frame tightening tool insertion hole 111 and the sleeper 10 to fix the sleeper fixing frame 100 to the sleeper 10. In FIG. 2, the anchor bolt that is the sleeper fixing frame fastening tool 20 is inserted later, but the anchor bolt may be fixed first. In this embodiment, the sleeper fixing frame 100 is placed on the sleeper 10 through an anchor bolt that is the tightening tool 20 for the sleeper fixing frame through the tightening tool insertion hole 111 for the sleeper fixing frame 100 of the sleeper fixing frame 100. . Further, the washer 21 is passed through the anchor bolt and tightened with the nut 22 to fix the sleeper fixing frame 100 to the sleeper 10.

  Here, the number of the sleeper fixing frame fasteners 20 is not limited, but it is preferable that the number is 2 considering the strength and the time required for insertion. Similarly, the number of sleeper fixing frame tightening tool insertion holes 111 is preferably two. Moreover, it is preferable that the washer 21 is a lock washer having a mechanism for preventing loosening by tension.

  In a device that uses frictional force for engagement with the sleeper 10, variation in frictional force is likely to occur, and thus variation in the lateral resistance of the roadbed is likely to occur. On the other hand, the installation method of the rail buckling prevention device of the present invention directly and securely tightens the sleeper fixing frame 100 and the sleeper 10 to provide strong and stable tightening and reduce variation in lateral resistance of the road bed. There is an effect to.

  Finally, the driving arrow 200 is inserted into the driving arrow insertion port 121 from above, and a part of the driving arrow 200 is pressed into the crushed stone. Then, the driving arrow bolt 30 is inserted into the driving arrow tightening tool insertion hole 122 and the screw insertion hole 210, and the driving arrow bolt 30 is tightened to fix the driving arrow 200 to the sleeper fixing frame 100.

  Here, the number of driving arrows 200 is not limited. However, considering the strength and the time required for press-fitting, it is preferable that the number is two. Similarly, the number of driving arrow insertion ports 121 is preferably two.

  The method for installing the rail buckling prevention device is as described above.

Table 1 shows the results of the measurement test of the road bed lateral resistance force of the rail buckling prevention device 1 of the present invention.
In the test, the rail buckling prevention device 1 is installed at the end of the laid PC sleeper, and the lateral resistance of the road bed is measured when displacement is applied every 1 mm up to a maximum of 10 mm.
The rail buckling prevention device 1 was fixed using anchor bolts as in the example, and two driving arrows 200 having 410 mm were used. Installed on one side of the rail buckling prevention device 1 and the PC sleeper, the lateral resistance of the road bed was measured. The lateral resistance of only the sleeper at 2 mm displacement is 6.5 kN / 2 mm.
In the table, sleeper no. The symbols with the same symbol indicate that the test was performed with the same sleeper. The average value and the standard deviation are values excluding trial numbers 5-2 and 5-3 in which the length of the driving arrow 200 is different.

When the length of the driving arrow 200 is 410 mm, the average value f of the lateral drag force obtained from the test results can be approximately expressed by the following equation as a function of the displacement x.
f = γ (1−e− ^αx ) + ^βx (1)
Here, α = 1.8, β = 0.9, and γ = 8.0, the unit of f is kN, and the unit of x is mm.

From the test results, the average value of the 2 mm displacement of the lateral resistance of the road bed of the rail buckling prevention device 1 of the present invention is an average of 9.6 kN according to (1), and the lateral resistance force of the bed bed alone is only 9.6 kN. The value is about 1.5 times that of comparison.
In this case, the lateral resistance force at the occurrence probability of 99.7% in consideration of the standard deviation is 7.5 kN, which is approximately 1.2 times as much as the lateral resistance force of the sleeper alone. Both values indicate that the performance is equivalent to the conventional product.
Here, the conventional product is an equivalent product of the buckling prevention device shown in Patent Literature, in which a pile plate is inserted and press-fitted into a member that sandwiches and fixes a sleeper from above and below.

  The rail buckling prevention device 1 can be installed without digging up crushed stone because there is no member that contacts the lower part of the sleeper 10. Depending on the test results and the configuration of the rail buckling prevention device 1, the rail buckling prevention device 1 is a maintenance-saving device that can be installed without disturbing the road bed, but with a performance equivalent to or better than that of the conventional product. A force can be added, and there is an effect that does not hinder the work of correcting the position of the trajectory.

  The rail buckling prevention device of the present invention can be widely used if it is a track that supports sleepers by crushed stone, that is, a so-called ballast track.

1 ... Rail buckling prevention device.
10 ... Sleeper.
20 ... Fasteners for sleeper fixing frames, 21 ... Washers, 22 ... Nuts.
30 ... Bolt for driving arrow.
DESCRIPTION OF SYMBOLS 100 ... Sleeper fixing frame, 110 ... Upper lid part, 111 ... Fastener insertion hole for sleeper fixing frames, 112 ... Thick board part, 120 ... Projection end part, 121 ... Driving arrow insertion port, 122 ... Insertion of fastener for driving arrow Hole, 123 ... inclined surface, 130 ... left side wall, 140 ... right side wall.
200 ... Driving arrow, 210 ... Screw insertion hole, 220 ... Planar portion, 230 ... Sharp point.

Claims (7)

A sleeper fixing frame comprising: an upper lid portion that comes into contact with an end portion of the upper surface of the sleeper with a surface; and a protruding end portion that is connected to the upper lid portion and covers an upper portion of the end surface of the sleeper;
A mounting arrow attached to the protruding end of the sleeper fixing frame and restrained by a crushed stone that supports the sleeper,
The sleeper fixing frame has a tightening tool insertion hole for a sleeper fixing frame that penetrates the upper lid portion, and the protruding end portion of the sleeper fixing frame has a driving arrow insertion port that penetrates the protruding end portion. A rail buckling prevention device characterized by   The sleeper fixing frame is bent from the upper lid portion, and a left side wall portion that covers an upper portion of the left side surface of the sleeper, and a right side wall portion that is bent from the upper lid portion and covers an upper portion of the right side surface of the sleeper, The rail buckling prevention device according to claim 1, further comprising:   3. The rail buckling prevention device according to claim 2, wherein the left side wall portion is in contact with the left side surface of the sleeper and the right side wall portion is in contact with the right side surface of the sleeper.   The sleeper fixing frame includes a thick plate portion projecting from the upper lid portion, and the fastener fixing frame insertion hole penetrates the upper lid portion and the thick plate portion in a vertical direction. The rail buckling prevention apparatus in any one of Claim 1 to 3.   The rail buckling prevention device according to any one of claims 1 to 4, wherein the driving arrow insertion port includes an inclined surface that guides the driving arrow in the sleeper direction. An installation method of the rail buckling prevention device according to any one of claims 1 to 5,
A railroad seat characterized in that the sleeper fixing frame fastener is inserted into the sleeper fixing frame tightening tool insertion hole and the hole of the sleeper to fix the sleeper fixing frame to the sleeper. How to install an anti-bending device. 7. The installation method of a rail buckling prevention device according to claim 6, wherein the fastener for the sleeper fixing frame is an anchor bolt.

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