JP2683523B2 - Rail buckling prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail buckling prevention device for preventing a rail from expanding and curving outward in a curve due to an increase in temperature, for example, in a curve section of a track. It is about.

[0002]

2. Description of the Related Art Since an axial pressure is generated because a rail expands and contracts due to a change in temperature, a sleeper to which the rail is fastened is embedded and fixed in a ballast roadbed. In particular, in recent years, as a means to reduce the damage of the track and improve the riding comfort of the train, the long rail that is welded to the standard length rail and has no seams has been widely adopted. Therefore, in order to suppress the expansion and contraction action, it is necessary to use a heavy-weight concrete sleeper (PC sleeper) that is securely fastened and to use a sufficient amount of crushed stone as a ballast ballast. If these requirements are not met, the rails may expand or contract abnormally or buckle due to the axial pressure of the rails, impairing the safety of train operation.

From such a standpoint, the movement resistance in the horizontal direction in the ballast of the sleeper has an important significance, and the roadbed resistance (the movement resistance in the rail direction of the rail is the longitudinal resistance of the roadbed, the direction perpendicular to the rail). The cross-sectional shape of the sleepers, the shoulder width of the ballasts on the outside of the sleeper end and the extra reinforcement, etc. must be designed and maintained so that the required value can be secured as the movement resistance to the roadbed lateral resistance. There is.

[0004] When installing a long rail on a sharp curve, the track lateral resistance is particularly important, and if it is insufficient, the track may bulge outside the curve when the temperature rises and buckle.

In order to prevent this, the conventional method is to install a metal fitting or the like that is engaged with the roadbed to prevent relative movement between the ballast layer and the sleeper, for example, as shown in FIG. The wing pieces 32, 32 are fixed to both sides at right angles to appropriate positions of 31 and a gate-shaped fitting body 33 having fitting insertion holes (not shown) at both ends is fitted and fitted. An anti-buckling device in a track in which a wedge rod 34 having a front end portion bent upward and a rear end portion bent downward is inserted into a fitting insertion hole of the united body 33 and fastened [utility model registration No. 1074772 (Act No. 4747).
-11845)]] is proposed. In the figure, reference numeral 35 is a rail, and 36 is a ballast.

[0006]

However, in the conventional buckling prevention device, as described above, the fitting body 33 is fitted and attached so as to be in close contact with the sleeper.
It is difficult to manufacture the fitting body 33 that matches the sleeper with a cross-sectional shape having a certain manufacturing error.
It was extremely difficult to attach 3 to the sleeper securely and firmly.

Further, the wing pieces 3 fixed to both side surfaces of the fitting body 33.
Since Nos. 2 and 32 are cantilevered and do not block the entire space between the sleepers, there is a problem that it is not possible to sufficiently cope with an excessive lateral bed resistance.

Therefore, the present invention has been made in view of the above-mentioned problems of the prior art, and even sleepers having manufacturing errors can be easily and surely attached, and an excessive lateral bedbed is required. An object of the present invention is to provide a buckling prevention device capable of sufficiently dealing with resistance.

[0009]

Therefore, in the present invention, the buckling prevention device is provided with an upper beam and a lower beam formed of channel steel having a U-shaped cross section at the upper and lower portions between the first adjacent sleepers. ,
The grooves are opposed to each other via packing , and are fixed between the sleepers by bolts and nuts.
A long flat steel plate orthogonal to each other is fixed, and a bearing plate is interposed between the upper beam and the lower beam.
An upper beam and a lower beam made of channel steel with a U-shaped cross section are provided above and below the sleepers adjacent to each other with their groove portions facing each other, and fixed between the sleepers with bolts and nuts. In addition, between the upper surface of the sleeper and the upper beam, a fitting protrusion for fitting the groove portion of the upper beam is formed on the upper surface, and inclined portions along the inclined surface of the sleeper are formed at both end portions of the lower surface. An upper beam fixing member is provided, a packing made of an elastic material such as hard rubber is provided between the underside of the sleeper and the lower beam, and a pressure plate is provided between the upper beam and the lower beam. It has a structure in which is interposed.

[0010]

With the above structure, the sleeper, the upper beam, the lower beam and the bearing plate are integrated by tightening the bolts. or,
Since the upper packing that is interposed on the upper beam side and the end portion of the upper beam fixing member have an inclined portion along the inclined surface of the sleeper,
By acting as a wedge by tightening the bolt,
Prevents lateral movement of the bearing plate.

[0011]

[Embodiment 1] An embodiment of the present invention will be described in detail below with reference to the drawings. Reference numeral 1 denotes a rail buckling prevention device, which is a support plate 2 serving as a main body of the buckling prevention device 1 , an upper beam 3 and a lower beam 4 for holding the support plate 2 from above and below, and the upper beam 3 and a concrete beam. An upper packing 6 interposed between the sleepers 5, a lower packing 7 interposed between the lower beams 4 and the sleepers 5, and a bolt 8 and a nut for connecting the upper beams 3 and the lower beams 4 and crimping and fixing them to the sleepers 5. It is composed of 9.

The upper beam 3 and the lower beam 4 are formed of channel steel having a U-shaped cross section, and two upper beams 3 are arranged in parallel with an appropriate interval, and the upper beams are provided at both ends of the upper surface thereof. A long flat steel plate 10 orthogonal to 3 is connected and fixed by means such as welding.
The upper beam 3 of the book is integrated. Further, fitting recesses 11 and 12 into which the upper packing 6 and the lower packing 7 are fitted are formed on the open end sides of both ends of the vertical portions of the upper beam 3 and the lower beam 4, respectively.

The upper packing 6 and the lower packing 7 are each made of an elastic material such as hard rubber, and the hem of the main body fitted in the groove of the upper beam 3 and the lower beam 4 has the upper beam 3 and the lower beam 7 at the bottom. Flange part 1 to be fitted into the fitting recesses 11 and 12 of the beam 4
3 and 14 are formed respectively, and are fitted inside the flange portions 13 and 14 to vertical portions located in the fitting recesses 11 and 12 of the upper beam 3 and the lower beam 4 along the main body portion. Fitting grooves 15 and 16 are formed respectively.

The upper packing 6 is formed with an extension 17 extending toward the end of the sleeper 5, the upper surface of which is in contact with the lower surface of the flat steel 10 and the lower surface of the extension 17. An inclined portion 19 is formed at the side end along the inclined surface 18 formed on the upper surface of the sleeper 5.

Next, a method of mounting the buckling prevention device 1 will be described. First, the lower packing 7 is fitted into the fitting recess 12 of the lower beam 4, the bolt 8 is inserted into the lower beam 4, and the lower packing 7 is placed so as to be positioned on the lower surface of the sleeper 5. The lower edge of the support plate 2 is fitted into the groove of the beam 4.

Next, the upper packing 6 is fitted into the fitting recess 1 in advance.
The groove portion of the upper beam 3 which has been fitted to 1 is fitted to the upper edge of the bearing plate 2, so that the upper packing 6 is aligned with the upper surface of the sleeper 5 and the inclined portion 19 is aligned with the inclined surface 18 of the sleeper 5. Position and place. After that, a nut 9 is screwed onto the upper end of the bolt 8 and the nut 9 is tightened and fixed.

The base of the bolt 8 and the bolt hole (not shown) of the lower packing 4 are formed in a rectangular shape or an elliptical shape so that the bolt 8 does not rotate even when the nut 9 is tightened.

[Embodiment 2] In this embodiment, an upper beam fixing member 20 in which the upper packing 6 and the flat steel 10 are integrated is used instead of the upper packing 6 and the upper beam fixing member 20 is used. Is formed of cast steel into a long rectangular rod shape along the longitudinal direction of the sleeper, and a fitting protrusion 21 for fitting the groove portion of the upper beam 3 is formed in the center of the upper surface of the sleeper. Projecting portions 22 and 23 projecting laterally are formed on the fitting projection 21 and both ends thereof. Further, at both ends of the lower surface of the upper beam fixing member 20, inclined portions 24 are formed along the inclined surface 18 formed on the upper surface of the sleeper 5.

The method for mounting the buckling prevention device 1 according to this embodiment is substantially the same as the mounting method for the first embodiment, but when mounting the upper beam 3, the upper beam fixture 20 is placed on the sleeper 5. The upper beam 3 is attached to the fitting protrusion 21 of the upper beam fixture 20.
Install by fitting the groove part of.

In this embodiment, only one fitting projection 21 is formed in the center, but the present invention is not limited to this, and two fitting projections 21 are formed at appropriate intervals, and the fitting projection 21 is installed in a double type as in the first embodiment. You may do it. On the contrary, the first embodiment may be a single type instead of the double type.

[0021]

According to the present invention as described above, the first
In the upper and lower parts between the sleepers adjacent to each other, an upper beam and a lower beam made of channel steel having a U-shaped cross section are provided by way of packings so that their groove portions face each other. Fixed between the sleepers by nuts and in front
At both ends of the upper surface of the upper beam, a long flat steel orthogonal to the upper beam is provided.
Is fixed, and a bearing plate is interposed between the upper and lower beams, and is formed of channel steel having a U-shaped cross section at the upper and lower portions between the second sleepers adjacent to each other. The upper and lower beams are installed so that their groove portions face each other, and are fixed between the sleepers by bolts and nuts. A fitting protrusion for fitting the groove portion of is formed, and an upper beam fixing member having an inclined portion along the inclined surface of the sleeper is formed at both ends of the lower surface, and between the lower surface of the sleeper and the lower beam, Since the packing formed of an elastic material such as hard rubber is interposed, and the pressure bearing plate is interposed between the upper beam and the lower beam,
Since the sleeper and the upper beam, the lower beam and the bearing plate can be integrated by tightening the bolts, buckling of the rail in the curved section can be prevented.

Further, according to the present invention, fitting recesses for fitting the packings are formed on the open end sides of both vertical portions of the upper beam and the lower beam, and the packings are provided with flanges for fitting the fitting recesses. Since a fitting groove is formed to fit the vertical part of the beam and the lower beam,
After the anti-buckling device is installed, the packing is securely fixed and does not move.

Further, according to the present invention, the upper packing and the upper beam fixing member interposed on the upper beam side are formed with inclined portions along the inclined surface of the sleeper at the lower end portions thereof, and the bolts are tightened. Since it acts as a wedge, it is possible to prevent the bearing plate from moving in the left-right direction. Therefore, since the movement of the buckling prevention device can be reliably prevented in combination with the prevention of the displacement of the packing, the rail buckling prevention effect can be further improved.

Further, in the first embodiment, since the flat steel orthogonal to the upper surface of the upper beam is fixed, it can serve as a reinforcing material for the upper packing below the flat steel.

Further, in the second embodiment, since the fitting projection portion of the upper beam fixing member and the both ends are formed with the projecting portions projecting laterally,
Since the contact surface with the upper beam and the sleepers can be increased, it is possible to provide the same function as in the case where the flat steel is welded and fixed to the upper beam as in the first embodiment.

Further, according to the second embodiment, the two upper beam fixing members facing each other are set so that the protruding portion side of the upper beam fixing member faces the sleeper side edge or the opposite side faces the sleeper side edge. By changing each of them, it is possible to deal with the deviation of the arrangement interval between the sleepers up to the range of twice the protrusion.

[Detailed Description of Drawings]

FIG. 1 is a partially enlarged perspective view of a buckling prevention device according to a first embodiment of the present invention.

FIG. 2 is an enlarged exploded perspective view showing the relationship between the upper beam and the upper packing of the same.

FIG. 3 is a front view showing a mounted state of the buckling prevention device according to the first embodiment of the present invention.

FIG. 4 is a plan view of the same.

FIG. 5 is a side view of the same.

FIG. 6 is an enlarged perspective view showing the relationship between the upper beam fixing member and the sleeper according to the second embodiment of the present invention.

FIG. 7 is a partially enlarged perspective view of a buckling prevention device according to a second embodiment of the present invention.

FIG. 8 is a side view showing a mounted state of a buckling prevention device according to a second embodiment of the present invention.

FIG. 9 is a side view showing a mounted state of a conventional buckling prevention device.

[Explanation of symbols] 1 Anti-buckling device 2 Support plate 3 Upper beam 4 Lower beam 5 Sleeper 6 Upper packing 7 Lower packing 8 Bolt 9 Nut 10 Flat steel 11 Fitting recess 12 Fitting recess 13 Flange part 14 Flange part 15 Fitting Fitting groove 16 Fitting groove 17 Extension portion 18 Sloping surface 19 Sloping portion 20 Upper beam fixing member 21 Fitting protrusion 22 Protruding portion 23 Protruding portion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigemi Bando 18-11 Kita-jojo Nishi, Chuo-ku, Sapporo-shi JR Apert 302-108 (72) Inventor Shigeru Miura 2-8 Mitsumachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Inventor Hideaki Yanagawa 2-8 Mitsumachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Takeji Fukuda 7-chome, Onodai, Sagamihara City, Kanagawa Prefecture 26-11 (72) Inventor Keisuke Kiriki 1-525 Higashi Taisei-cho, Omiya City, Saitama Prefecture

Claims (7)

(57) [Claims] 1. An upper beam and a lower beam, which are made of channel steel and have a U-shaped cross section, are provided above and below adjacent sleepers via packing so that their groove portions face each other. Fixed between the sleepers with bolts and nuts
And both ends of the upper surface of the upper beam are orthogonal to the upper beam.
A rail buckling prevention device characterized in that a long flat steel plate is fixed and a bearing plate is interposed between the upper beam and the lower beam. 2. On the open end sides of the vertical beam ends of the upper beam and the lower beam.
The rail buckling prevention device according to claim 1, wherein a fitting recess for fitting the packing is formed . 3. The packing is made of an elastic material such as hard rubber.
The front of the hem of the main body that fits into the groove of the upper and lower beams
The rail buckling prevention device according to claim 1, wherein a flange portion that fits into the fitting recess of the upper beam and the lower beam is formed. 4. The upper packing interposed on the upper beam side comprises:
An extension is formed toward the end of the sleeper, and the upper surface is
It is designed to come into contact with the lower surface of flat steel, and the lower end is sleepers.
An inclined portion is formed along the inclined surface of the
A fitting groove is formed between the main body and the vertical part of the upper beam.
Lower packing that is made and is installed on the lower beam side
The rail buckling prevention device according to claim 1 , wherein a fitting groove to be fitted to a vertical portion of the lower beam is also formed in the rail. 5. A U-shaped cross section is provided at the upper and lower portions between adjacent sleepers.
The upper and lower beams made of eggplant channel steel have their groove
Bolts and nuts are installed so that they face each other.
Is fixed between the sleepers by the top and top of the sleepers
Between the beams, a fitting protrusion that fits the groove of the upper beam on the upper surface
Is formed, and the sloped parts along the slopes of the sleepers are formed on both ends of the lower surface.
The upper beam fixing member with the
A packing made of elastic material such as hard rubber
And a bearing plate is interposed between the upper and lower beams.
A rail buckling prevention device characterized by being installed. 6. An upper end is provided on the open end side of both ends of the vertical part of the upper beam.
A fitting recess is formed to fit the beam fixing member.
The rail buckling prevention device according to claim 5. 7. The fitting projection portion and both ends of the upper beam fixing member are
The rail buckling prevention device according to claim 5, wherein a protrusion that protrudes laterally is formed.