JP6844049B2 - Track pad and rail support structure - Google Patents

Description

The present invention relates to a track pad used when laying a rail of a railway or the like and a rail support structure using the track pad.

Conventionally, when laying rails on sleepers or tie rates to form tracks for railways, etc., to prevent the rails from biting into the sleepers or tie rates, and to prevent vibration and noise generated when the vehicle runs. To mitigate, an elastic track pad is provided between the sleepers or tie plate and the rail.

Patent Document 1 is configured by joining a plate-shaped pad material made of an elastic body to a plate material having rigidity, and is interposed between a track rail and a tie plate which is a bearing of the track rail. A track pad with a spring constant is disclosed. This track pad stabilizes the spring constant by joining a rigid stainless steel plate to one surface of the pad material to uniformly deform the pad material, thereby causing vibration when the train runs on the rail. It absorbs effectively and improves the ride comfort of the train.

In Patent Document 2, in a track pad in which a steel plate is adhered to the upper surface of a thick square rubber plate and the bottom surface of the rail is placed on the steel plate, both ends of the steel plate on the longitudinal side of the rail are perpendicular to the lower side. Disclosed is a track pad with a steel plate, which is bent into a folded piece and is mounted by covering the folded piece with a tie plate or a front and rear side surface of a sleeper. In this track pad with a steel plate, a steel plate is provided on the upper surface of the track pad made of highly elastic rubber that contacts the bottom surface of the rail, so that slippage easily occurs between the steel plate and the rail, and the rail expands and contracts due to vibration and heat. The track pad with a steel plate is prevented from shifting, and further, by providing a bent piece on the steel plate, the track pad with a steel plate is prevented from shifting and falling off from the tie plate or sleepers.

Japanese Patent No. 3345210 Japanese Unexamined Patent Publication No. 10-237802

In the track pad of Patent Document 1, a stainless steel plate is used as a plate material having rigidity. However, when rust occurs on the surface of the stainless steel plate in this track pad, the coefficient of friction between the stainless steel plate and the track rail becomes high, and slippage between the two becomes less likely to occur. In this state, if the track rail expands and contracts due to changes in temperature or the like, the track pad may move following the expansion and contraction movement of the track rail. In addition, the track pad also vibrates in accordance with the vibration of the track rail, which may cause the track pad to move from the installation position. When such movement occurs, in the worst case, the track pad falls off from the sleepers, tie plate, or the like.

Further, when a resin such as rubber or urethane is used as the elastic material in the track pad disclosed in Patent Document 1, the elasticity and elasticity of these elastic materials and the stainless steel plate are significantly different from each other, so that impact and heat are generated. When applied, the track pad tends to warp. Due to this warping and the change over time after repeated warping, the elastic body may peel off from the stainless steel plate, and the function as a track pad that causes slippage with the rail may be lost at an early stage. there were.

In the track pad disclosed in Patent Document 2, as in the case of Patent Document 1, when the surface of the steel plate is rusted, the coefficient of friction between the steel plate and the track rail becomes high, and slippage between the two is less likely to occur. In this state, if the track rail expands and contracts due to changes in temperature or the like, the track pad may move following the expansion and contraction movement of the track rail. Further, in this track pad, the bent pieces provided on the steel plate are put on the front and rear side surfaces of sleepers or tie plates to prevent them from falling off, but due to the structure of the place where the rails are laid, the bent pieces may be provided. In some cases, it was not possible to prevent the track pad from falling off. In addition, it was not possible to prevent warping and peeling due to the difference in elasticity between the elastic material and stainless steel.

Therefore, an object of the present invention is to provide a track pad and rail support structure capable of significantly reducing friction between the track pad and the rail and preventing the track pad from falling off the sleepers or tie plate. ..

Another object of the present invention is to provide a track pad and a rail support structure in which the members constituting the track pad are less likely to be peeled off and the durability is improved.

According to the present invention, it is a track pad interposed between a rail and a sleeper or a tie plate, and is a low friction sheet material fixed on a plate-shaped elastic member and a surface of the elastic member in contact with the rail. The low-friction sheet material is provided so that the upper surface, which is the mounting surface of the rail, has a low friction coefficient in at least one direction, and the direction having the low friction coefficient of the upper surface coincides with the laying direction of the rail. Is fixed on the above-mentioned surface of the elastic member.

The low-friction sheet material is configured to have a low coefficient of friction in at least one direction on the upper surface, and is fixed on the elastic member so that the direction having the low coefficient of friction on the upper surface is the laying direction of the rail. Will be done. For this reason, the friction coefficient on the rail mounting surface of the track pad, especially in the direction of expansion and contraction of the rail, is significantly lower than the friction coefficient of the conventional track pad, and sufficient sliding is ensured. Therefore, even when the rail expands and contracts, the track pad Will not drop out. Further, since the low friction sheet material is not made of metal, rust does not occur and friction does not increase, so that sufficient slippage is ensured for a long period of time. Therefore, the track pad does not move with the rail and fall off the sleepers or tie plate. Moreover, since the warp does not occur when an impact or heat is applied, there is no inconvenience that the members constituting the track pad are peeled off from each other. As a result, it is possible to reduce the inspection and maintenance work of the rail while alleviating the track vibration, which is the original performance of the track pad, and maintaining the comfort of the railway for a long period of time. Further, the low-friction sheet material of the present invention has durability and can increase the degree of freedom in designing the elastic member by combining with the low-friction sheet material of various materials.

The low-friction sheet material is preferably composed of a plurality of layers using a woven fabric or knitted fabric made of fluororesin fiber for one surface layer and a material having good adhesion to an elastic member for the other surface layer. This makes it easy to obtain a configuration in which the upper surface, which is the mounting surface of the rail, has a low coefficient of friction in at least one direction. In addition, workability when adhering to the elastic member can be improved. Furthermore, the flexibility of the track pad can be maintained.

In this case, it is more preferable that the other surface layer is felt, woven fabric or knitted fabric using fibers having good adhesiveness to the elastic member.

The elastic member preferably has a plurality of grooves extending in the rail laying direction on at least one surface.

In this case, the elastic member has a plurality of grooves extending in the rail laying direction on the surface on the low friction sheet material side, and the low friction sheet material has a band shape on the upper surface of the plurality of ridges between the plurality of grooves of the elastic member. It is more preferable that it is fixed to.

The elastic member preferably has a chamfered portion having a shape in which the ridge angle portion is scraped off at the edge portion of the surface on the rail side.

It is also preferable that the elastic member is made of rubber or urethane. As a result, since it has sufficient elasticity, it is possible to alleviate the track vibration, and there is no problem in fixing the low friction sheet material.

It is preferable that the elastic member and the low friction sheet material are fixed by vulcanization adhesion. As a result, both members can be easily bonded, and the bonded elastic member and the low-friction sheet material are difficult to peel off. Therefore, the rail can be maintained for a long period of time while alleviating track vibration and maintaining good railroad riding comfort. Inspection and maintenance work can be reduced.

INDUSTRIAL APPLICABILITY Further, according to the present invention, there is provided a rail support structure in which a track pad and a rail are sequentially fixed on the above tie plate or on the sleepers. This track pad includes a plate-shaped elastic member and a low-friction sheet material fixed on the rail-side surface of the elastic member, and the low-friction sheet material has at least one upper surface serving as a rail mounting surface. It has a low coefficient of friction in one direction and is fixed on the above-mentioned surface of the elastic member so that the direction having the low coefficient of friction on the upper surface coincides with the laying direction of the rail.

As a result, the friction between the track pad and the rail can be significantly reduced and the durability can be improved, and a rail support structure can be obtained in which the track pad does not fall off from the sleepers or the tie plate.

In the rail support structure, the low-friction sheet material is composed of a plurality of layers using a woven fabric or knitted fabric made of fluororesin fiber for one surface layer and a material having good adhesion to an elastic member for the other surface layer. Is preferable.

In this case, it is more preferable that the other surface layer is felt, woven fabric or knitted fabric using fibers having good adhesiveness to the elastic member.

Further, in the rail support structure, it is preferable that the elastic member has a plurality of grooves extending in the rail laying direction on at least one surface.

In this case, the elastic member has a plurality of grooves extending in the rail laying direction on the surface on the low friction sheet material side, and the low friction sheet material has a band shape on the upper surface of the plurality of ridges between the plurality of grooves of the elastic member. It is more preferable that it is fixed to.

Further, in the rail support structure, it is preferable to have a chamfered portion having a shape in which the ridge angle portion is scraped off at the edge portion of the surface on the rail side.

Further, in the rail support structure, it is preferable that the elastic member is made of rubber or urethane.

Further, in the rail support structure, it is preferable that the elastic member and the low friction sheet material are fixed by vulcanization adhesion.

According to the present invention, the low friction sheet material of the track pad is configured to have a low friction coefficient in at least one direction of the upper surface, and the direction having the low friction coefficient of the upper surface is the rail laying direction. It is fixed on the elastic member so as to be. For this reason, the friction coefficient on the rail mounting surface of the track pad, especially in the direction of expansion and contraction of the rail, is significantly lower than the friction coefficient of the conventional track pad, and sufficient slippage is ensured. Will not drop out. Further, since the low friction sheet material is not made of metal, rust does not occur and friction does not increase, so that sufficient slippage is ensured for a long period of time. Therefore, the track pad does not move with the rail and fall off the sleepers or tie plate. Moreover, since the warp does not occur when an impact or heat is applied, there is no inconvenience that the members constituting the track pad are peeled off from each other. As a result, it is possible to reduce the inspection and maintenance work of the rail while alleviating the track vibration, which is the original performance of the track pad, and maintaining the comfort of the railway for a long period of time. Further, the low-friction sheet material of the present invention has durability and can increase the degree of freedom in designing the elastic member by combining with the low-friction sheet material of various materials.

It is a perspective view which shows typically the structure of the track pad which concerns on 1st Embodiment of this invention. It is an exploded perspective view which shows the structure of the track pad shown in FIG. 1 schematicly. FIG. 5 is a cross-sectional view schematically showing a configuration example of a rail support structure using the track pad shown in FIG. 1. It is a top surface and side view which shows the structure of the track pad which concerns on 2nd Embodiment of this invention. FIG. 5 is a cross-sectional view schematically showing a configuration example of a rail support structure using the track pad shown in FIG. It is a top surface and side view which shows schematic structure of the track pad which concerns on 3rd Embodiment of this invention. 6 is a cross-sectional view schematically showing a configuration example of a rail support structure using the track pad shown in FIG. It is a top surface and side view which shows schematic structure of the track pad which concerns on 4th Embodiment of this invention. FIG. 5 is a cross-sectional view schematically showing a configuration example of a rail support structure using the track pad shown in FIG. It is a top surface and side view which shows schematic structure of the track pad which concerns on 5th Embodiment of this invention. FIG. 5 is a cross-sectional view schematically showing a configuration example of a rail support structure using the track pad shown in FIG. It is a top surface and side view which shows the structure of the track pad which concerns on 6th Embodiment of this invention. It is sectional drawing which shows typically the structural example of the support structure of the rail using the track pad shown in FIG. It is a top surface and side view which shows schematic structure of the track pad which concerns on 7th Embodiment of this invention. FIG. 6 is a cross-sectional view schematically showing a configuration example of a rail support structure using the track pad shown in FIG.

Hereinafter, the track pad according to the present invention and the support structure of the rail using the track pad will be described with reference to the embodiments.

FIG. 1 schematically shows the configuration of the track pad 100 according to the first embodiment of the present invention, FIG. 2 shows the configuration of each part of the track pad 100 shown in FIG. 1, and FIG. 3 shows the configuration of each part of the track pad 100. A configuration example of the rail support structure 200 using the track pad 100 shown in the above is shown.

As shown in FIGS. 1 and 2, the track pad 100 in the present embodiment is composed of an elastic member 10 and a low friction sheet material 20 superimposed and fixed on the elastic member 10. The low friction sheet material 20 is configured such that the upper surface thereof, which is the mounting surface of the rail R, has a low friction coefficient in at least one direction. The elastic member 10 and the low friction sheet material 20 are fixed to each other by vulcanization adhesion. The arrow A in FIG. 1 indicates the direction in which the friction coefficient is the lowest on the upper surface of the low friction sheet material 20.

As shown in FIG. 3, the rail support structure 200 is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100, and the rail R in this order on the concrete track slab 60. In the track pad 100, the track pad 100 is fixed on the elastic member 10 so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20 coincides with the laying direction (longitudinal direction) of the rail R.

The elastic member 10 is a flat plate having elasticity or a member provided with a groove or the like in order to obtain a predetermined spring property, is provided on the tie plate 30 between the rail R and the tie plate 30, and is a railroad on the track. This is for absorbing shocks and vibrations generated when a vehicle or the like travels.

The elastic member 10 is formed of a constituent material capable of ensuring elasticity. As such a constituent material, a mixed material such as rubber or urethane, which has a certain degree of durability and elasticity that can be continuously used without replacement against the impact from the rail R, is appropriately selected. Will be done. As this type of material, for example, SBR (styrene butadiene rubber), SBR-based carbon black reinforcing rubber, EPDM (ethylene propylene diene rubber), or EPM (EPT, ethylene propylene rubber) is used.

The size of the elastic member 10 can be appropriately selected according to the purpose of use, and in the present embodiment, one having a size of 140 × 180 mm, which is one of the standard dimensions of the track pad, is used. The thickness of the elastic member 10 shown in FIGS. 1 to 3 is selected so as to sufficiently secure the elasticity of the constituent material of the elastic member 10.

The low friction sheet material 20 is on the rail R side plane (upper surface in FIGS. 1 and 2) of the elastic member 10 when the elastic member 10 is interposed between the rail R and the tie plate 30. It is stuck to. The low-friction sheet material 20 is integrally formed by being adhered to the elastic member 10 with high adhesive force to rubber or the like by, for example, vulcanization adhesion or the like.

As the low-friction sheet material 20, a sheet material in which at least one surface layer is made of a low-friction material such as a fluororesin, a polyethylene resin, or a polyphenylene sulfide (PPS) resin can be used. Of these, fluororesin is preferable. Fiber is preferable as the form of the material used for at least one of these surface layers. It is also preferable to use another material on the other surface, which has higher adhesiveness to the elastic member than the above material. For example, one surface layer 21 is made of a woven fabric or knitted fabric made of fluororesin fiber, and the other surface layer 22 is made of a plurality of layers made of felt, woven fabric or knitted fabric made of fibers having good adhesion to the elastic member 10. Is desirable. The plurality of layers are, for example, a textile or knitted fabric made of fluororesin fibers combined with fibers having good adhesiveness and textileized with a multi-layer structure. Specific examples thereof include multiple woven fabrics such as double woven fabrics that have been textileized with a multiple woven structure such as a double woven structure, and multiple knitted fabrics such as double knitted fabrics that have been textileized with a multiple knitted structure such as a double knitted structure. Of these, double woven fabrics are preferable. The fluororesin fiber is composed of a polymer having a repeating structural unit containing one or more fluorine atoms in the main chain or side chain, and is preferably composed of a repeating structural unit having a large number of fluorine atoms. For example, polytetrafluoroethylene (PTFE), ethylene tetrafluoride-6 propylene fluoride copolymer (FEP), ethylene tetrafluoride-perfluoroalkyl vinyl ether copolymer (PFA), ethylene-4 ethylene fluoride copolymer. Coalescence (ETFE) and the like can be mentioned, and among them, it is more preferable to use PTFE fiber having excellent surface low friction characteristics. Further, the above-mentioned homopolymer or copolymer may be copolymerized with other components in a repeating structure. Examples of fibers having good adhesiveness include liquid crystal polymer fibers, polyamide fibers, aromatic polyamide fibers, polyimide fibers, polyamideimide fibers, polyester fibers, polyphenylene sulfide (PPS) fibers, polysulfoxide fibers, urethane fibers and the like. Among them, PPS fibers having excellent chemical resistance and long-term durability such as acids, alkalis and organic solvents are preferable. In this case, one surface of the low friction sheet material 20 (that is, the upper surface serving as the mounting surface of the rail R) has a low friction coefficient in at least one direction, and the direction having the low friction coefficient of the upper surface. Is fixed on the elastic member 10 so as to coincide with the laying direction of the rail R. Therefore, the sliding between the low friction sheet material 20 and the rail R is very good, especially in the expansion / contraction direction of the rail. The other surface of the low friction sheet material 20, that is, the lower surface, is fixed to the elastic member 10 by vulcanization adhesion. For vulcanization adhesion between the elastic member 10 and the low friction sheet material 20, the elastic member 10 is dipped in a state where tension is applied to the low friction sheet material 20 and set in a mold, and the elastic member 10 is charged therein. It is vulcanized with and made into an integrally molded product. The lower surface of the low friction sheet material 20 and the elastic member 10 may be bonded by a method other than vulcanization bonding, for example, a general adhesive or a cross-linking material other than sulfur. Further, the molding may be performed by a method other than dipping. For example, a method of applying an RFL (Resorcin Formaldehyde) agent is also applicable.

The tie plate 30 is a rectangular plate-like body made of cast iron or steel, and has a flat portion 31 at the center of the upper surface on which the rail R and the track pad 100 are placed, and both sides of the flat portion 31 parallel to the longitudinal direction of the rail R. It has a mounting protrusion 32 that projects upward. The tie plate 30 is fixed on the concrete track slab 60 by the mounting bolts B1 with the insulating plate 40 and the cushioning material 50 interposed therebetween. In some cases, the insulating plate 40 and the cushioning material 50 may not be provided.

Further, the fastening device 70 is a device that fixes the rail R to the tie plate 30 to hold the track, resists the load and vibration transmitted from the vehicle to the track, and transmits these to the substructure. The fastening device 70 is a leaf spring formed by bending a rectangular plate having a spring property in the lateral direction, and is attached so that the tip in the bending direction abuts on the bottom of the rail R. Further, an elongated hole for inserting the fastening bolt B is provided in the central portion of the fastening device 70.

When laying the rail R, the rail R is placed on the flat portion 31 at the center of the upper surface of the tie plate 30 via the track pad 100. In this state, the rail R is laid by inserting the fastening bolt B provided in the mounting protrusion 32 of the tie plate 30 into the elongated hole of the fastening device 70 and tightening the nut N to the fastening bolt B.

As described above, according to the present embodiment, the track pad 100 includes an elastic member 10 and a low friction sheet material 20. Further, the rail support structure 200 is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100, and the rail R in this order on the concrete track slab 60. In the track pad 100, the track pad 100 is fixed on the elastic member 10 by vulcanization adhesion so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20 coincides with the laying direction of the rail R.

As a result, the upper surface of the low-friction sheet material 20 has a lower coefficient of friction than metal, and slippage is ensured between the upper surface and the rail R, especially in the direction of expansion and contraction of the rail. The track pad does not move following this expansion and contraction movement of the rail, and as a result, the track pad 100 does not fall off. Since the low friction sheet material 20 does not rust or increase friction, slippage is ensured for a long period of time. Therefore, the track pad 100 does not fall off from the tie plate 30 (or sleepers), and the members constituting the track pad 100 are not easily peeled off from each other, so that the track vibration, which is the original performance of the track pad 100, can be alleviated. It will be a track pad that reduces the inspection and maintenance work of the rail R while maintaining the comfort of the railroad for a long period of time. Further, the low friction sheet material 20 of the present embodiment has durability and can increase the degree of freedom in designing the elastic member 10 by combining with the low friction sheet material of various materials.

The low-friction sheet material 20 is a plurality of layers using a woven fabric or knitted fabric made of fluororesin fiber for one surface layer 21 and a felt, woven fabric or knitted fabric made of fiber having good adhesion to the elastic member 10 for the other surface layer 22. Therefore, it is possible to easily obtain a configuration in which the upper surface serving as the mounting surface of the rail R has a low friction coefficient in at least one direction. In addition, workability when adhering to the elastic member 10 can be improved. Further, the flexibility of the track pad 100 can be maintained.

Further, since the elastic member 10 is made of rubber or urethane, it has sufficient elasticity to alleviate the orbital vibration, and there is no problem in fixing the low friction sheet material 20.

Further, since the elastic member 10 and the low friction sheet material 20 are fixed by vulcanization adhesion, both members can be easily adhered, and the bonded elastic member 10 and the low friction sheet material 20 are separated from each other. Since it is difficult to do so, it is possible to reduce the inspection and maintenance work of the rail while alleviating the track vibration and maintaining the comfort of the railway for a long period of time.

FIG. 4 schematically shows the configuration of the track pad 100A according to the second embodiment of the present invention, in which FIG. 4A is a top view, FIG. 4B is a side view, and FIG. 4C is a side view. ) Is an end view. FIG. 5 shows a configuration example of a rail support structure 200A using the track pad 100A shown in FIG.

As shown in FIG. 4, the track pad 100A in the present embodiment is composed of an elastic member 10A and a low friction sheet material 20 superimposed and fixed on the elastic member 10A. The low friction sheet material 20 is configured such that the upper surface thereof, which is the mounting surface of the rail R, has a low friction coefficient in at least one direction. The elastic member 10A and the low friction sheet material 20 are fixed to each other by vulcanization adhesion. The arrow A in FIG. 4 indicates the direction in which the friction coefficient is the lowest on the upper surface of the low friction sheet material 20.

As shown in FIG. 5, the rail support structure 200A is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100A, and the rail R in this order on the concrete track slab 60. In the track pad 100A, the track pad 100A is fixed on the elastic member 10A so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20 coincides with the laying direction (longitudinal direction) of the rail R.

The elastic member 10A is a member provided with a plurality of grooves 11 extending in the laying direction of the rail R in order to obtain a predetermined spring property on the lower surface of the flat plate-shaped member having elasticity, and is between the rail R and the tie plate 30. It is provided on the tie plate 30 and is for absorbing shocks and vibrations generated when a railroad vehicle or the like travels on a track. The material of the elastic member 10A is the same as that of the track pad 100 of the first embodiment described above.

The low friction sheet material 20 has the same configuration as that of the track pad 100 of the first embodiment described above.

As described above, according to the present embodiment, the track pad 100A includes an elastic member 10A and a low friction sheet material 20. The elastic member 10A is provided with a plurality of grooves 11 extending in the laying direction of the rail R in order to obtain a predetermined spring property on the lower surface of the flat plate-shaped member having elasticity. Further, the rail support structure 200A is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100A, and the rail R in this order on the concrete track slab 60. In the track pad 100A, the track pad 100A is fixed on the elastic member 10A by vulcanization adhesion so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20 coincides with the laying direction of the rail R.

As a result, the same effect as that of the first embodiment described above can be obtained, and by providing a plurality of grooves 11 extending in the laying direction of the rail R on the lower surface of the elastic member 10A, a predetermined spring property can be easily obtained. Can be done.

FIG. 6 schematically shows the configuration of the track pad 100B according to the third embodiment of the present invention, in which FIG. 6A is a top view, FIG. 6B is a side view, and FIG. 6C is a side view. ) Is an end view. FIG. 7 shows a configuration example of the rail support structure 200B using the track pad 100B shown in FIG.

As shown in FIG. 6, the track pad 100B in the present embodiment is composed of an elastic member 10B and a low friction sheet material 20 superimposed and fixed on the elastic member 10B. The low friction sheet material 20 is configured such that the upper surface thereof, which is the mounting surface of the rail R, has a low friction coefficient in at least one direction. The elastic member 10B and the low friction sheet material 20 are fixed to each other by vulcanization adhesion. The arrow A in FIG. 6 indicates the direction in which the friction coefficient is the lowest on the upper surface of the low friction sheet material 20.

As shown in FIG. 7, the rail support structure 200B is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100B, and the rail R in this order on the concrete track slab 60. In the track pad 100B, the track pad 100B is fixed on the elastic member 10B so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20 coincides with the laying direction (longitudinal direction) of the rail R.

The elastic member 10B is provided with a plurality of grooves 11 extending in the laying direction of the rail R in order to obtain a predetermined spring property on the lower surface of the flat plate-shaped member having elasticity, and at the edge portion of the surface on the rail R side. It is a member provided with a chamfered portion 12 having a shape in which the ridge angle portion is scraped off, is provided on the tie plate 30 between the rail R and the tie plate 30, and is generated when a railroad vehicle or the like travels on the track. It is for absorbing shock and vibration. The material of the elastic member 10B is the same as that of the track pad 100 of the first embodiment described above.

The low friction sheet material 20 has the same configuration as that of the track pad 100 of the first embodiment described above.

As described above, according to the present embodiment, the track pad 100B includes an elastic member 10B and a low friction sheet material 20. The elastic member 10B is provided with a plurality of grooves 11 extending in the laying direction of the rail R in order to obtain a predetermined spring property on the lower surface of the flat plate-shaped member having elasticity, and the end edge portion of the surface on the rail R side. A chamfered portion 12 having a shape in which the ridge angle portion is scraped off is provided. Further, the rail support structure 200B is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100B, and the rail R in this order on the concrete track slab 60. In the track pad 100B, the track pad 100B is fixed on the elastic member 10B by vulcanization adhesion so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20 coincides with the laying direction of the rail R.

As a result, the same effect as that of the first embodiment described above can be obtained, and by providing a plurality of grooves 11 extending in the laying direction of the rail R on the lower surface of the elastic member 10B, a predetermined spring property can be easily obtained. Can be done. Further, by providing a chamfered portion 12 having a shape in which the ridge angle portion is scraped off at the edge portion of the surface on the rail R side, the deformation of the upper surface edge portion of the elastic member 10B by the rail R is suppressed and is suppressed. It is possible to prevent the edge portion of the low friction sheet material 20 from fraying.

FIG. 8 schematically shows the configuration of the track pad 100C according to the fourth embodiment of the present invention, in which FIG. 8A is a top view, FIG. 8B is a side view, and FIG. 8C is a side view. ) Is an end view. FIG. 9 shows a configuration example of the rail support structure 200C using the track pad 100C shown in FIG.

As shown in FIG. 8, the track pad 100C in the present embodiment is composed of an elastic member 10C and a plurality of low friction sheet materials 20a superimposed and fixed on the elastic member 10C. The low friction sheet material 20a is configured such that the upper surface thereof, which is the mounting surface of the rail R, has a low friction coefficient in at least one direction. The elastic member 10C and the low friction sheet material 20a are fixed to each other by vulcanization adhesion. The arrow A in FIG. 8 indicates the direction in which the friction coefficient is the lowest on the upper surface of the low friction sheet material 20a.

As shown in FIG. 9, the rail support structure 200C is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100C, and the rail R in this order on the concrete track slab 60. In the track pad 100C, the track pad 100C is fixed on the elastic member 10C so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20a coincides with the laying direction (longitudinal direction) of the rail R.

The elastic member 10C is a member provided with a plurality of grooves 11 and 11a extending in the laying direction of the rail R in order to obtain a predetermined spring property on the lower surface and the upper surface of the flat plate-shaped member having elasticity, and the rail R and the tie plate 30. It is provided on the tie plate 30 between and, and is for absorbing the impact and vibration generated when a railroad vehicle or the like travels on the track. Further, in order to obtain predetermined springiness and strength, it is preferable that the plurality of grooves 11 on the lower surface of the elastic member 10C and the plurality of grooves 11a on the upper surface are provided at positions deviated from each other. For example, the groove 11a on the upper surface is provided at a position corresponding to an intermediate position between the grooves 11 on the lower surface. The material of the elastic member 10C is the same as that of the track pad 100 of the first embodiment described above.

The low friction sheet material 20a is formed in a band shape corresponding to the upper surface of the elastic member 10C in contact with the rail (that is, the upper surface of the plurality of ridges between the plurality of grooves 11a). The other configuration of the low friction sheet material 20a has the same configuration as that of the track pad 100 of the first embodiment described above.

As described above, according to the present embodiment, the track pad 100C includes an elastic member 10C and a low friction sheet material 20a. The elastic member 10C is provided with a plurality of grooves 11 and 11a extending in the laying direction of the rail R in order to obtain a predetermined spring property on the lower surface and the upper surface of the flat plate-shaped member having elasticity. Further, the rail support structure 200C is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100C, and the rail R in this order on the concrete track slab 60. In the track pad 100C, the track pad 100C is fixed on the elastic member 10C by vulcanization adhesion so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20a coincides with the laying direction of the rail R.

As a result, the same effect as that of the first embodiment described above can be obtained, and by providing a plurality of grooves 11 and 11a extending in the laying direction of the rail R on the lower surface and the upper surface of the elastic member 10C, the degree of freedom in design is increased. It becomes large, and a predetermined springiness can be obtained more easily.

FIG. 10 schematically shows the configuration of the track pad 100D according to the fifth embodiment of the present invention, in which FIG. 10A is a top view, FIG. 10B is a side view, and FIG. 10C is a side view. ) Is an end view. FIG. 11 shows a configuration example of the rail support structure 200D using the track pad 100D shown in FIG.

As shown in FIG. 10, the track pad 100D in the present embodiment is composed of an elastic member 10D and a plurality of low friction sheet materials 20a superimposed and fixed on the elastic member 10D. The low friction sheet material 20a is configured such that the upper surface thereof, which is the mounting surface of the rail R, has a low friction coefficient in at least one direction. The elastic member 10D and the low friction sheet material 20a are fixed to each other by vulcanization adhesion. The arrow A in FIG. 10 indicates the direction in which the friction coefficient is the lowest on the upper surface of the low friction sheet material 20a.

As shown in FIG. 11, the rail support structure 200D is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100D, and the rail R in this order on the concrete track slab 60. In the track pad 100D, the track pad 100D is fixed on the elastic member 10D so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20a coincides with the laying direction (longitudinal direction) of the rail R.

The elastic member 10D is provided with a plurality of grooves 11 and 11a extending in the laying direction of the rail R in order to obtain a predetermined spring property on the lower surface and the upper surface of the flat plate-shaped member having elasticity, and the end of the surface on the rail R side. A member provided with a chamfered portion 12 having a shape in which a ridge angle portion is scraped off at an edge portion, which is provided on a tie plate 30 between a rail R and a tie plate 30, and a railroad vehicle or the like travels on a track. It is for absorbing the shock and vibration generated during the operation. The material of the elastic member 10D is the same as that of the track pad 100 of the first embodiment described above.

The low friction sheet material 20a is formed in a band shape corresponding to the upper surface of the elastic member 10D in contact with the rail (that is, the upper surface of the plurality of ridges between the plurality of grooves 11a). The other configuration of the low friction sheet material 20a has the same configuration as that of the track pad 100 of the first embodiment described above.

As described above, according to the present embodiment, the track pad 100D includes an elastic member 10D and a low friction sheet material 20a. The elastic member 10D is provided with a plurality of grooves 11 and 11a extending in the laying direction of the rail R in order to obtain a predetermined spring property on the lower surface and the upper surface of the flat plate-shaped member having elasticity, and the end of the surface on the rail R side. A chamfered portion 12 having a shape in which the ridge angle portion is scraped off is provided on the edge portion. Further, the rail support structure 200D is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100D, and the rail R in this order on the concrete track slab 60. In the track pad 100D, the track pad 100D is fixed on the elastic member 10D by vulcanization adhesion so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20a coincides with the laying direction of the rail R.

As a result, the same effect as that of the first embodiment described above can be obtained, and by providing a plurality of grooves 11 and 11a extending in the laying direction of the rail R on the lower surface and the upper surface of the elastic member 10D, the degree of freedom in design is increased. It becomes large, and a predetermined springiness can be obtained more easily. Further, by providing a chamfered portion 12 having a shape in which the ridge angle portion is scraped off at the edge portion of the surface on the rail R side, the deformation of the upper surface edge portion of the elastic member 10D by the rail R is suppressed and is suppressed. It is possible to prevent the edge portion of the low friction sheet material 20a from fraying.

FIG. 12 schematically shows the configuration of the track pad 100E according to the sixth embodiment of the present invention, in which FIG. 12A is a top view, FIG. 12B is a side view, and FIG. 12C is a side view. ) Is an end view. FIG. 13 shows a configuration example of the rail support structure 200E using the track pad 100E shown in FIG.

As shown in FIG. 12, the track pad 100E in the present embodiment is composed of an elastic member 10E and a plurality of low friction sheet materials 20a superimposed and fixed on the elastic member 10E. The low friction sheet material 20a is configured such that the upper surface thereof, which is the mounting surface of the rail R, has a low friction coefficient in at least one direction. The elastic member 10E and the low friction sheet material 20a are fixed to each other by vulcanization adhesion. The arrow A in FIG. 12 indicates the direction in which the friction coefficient is the lowest on the upper surface of the low friction sheet material 20a.

As shown in FIG. 13, the rail support structure 200E is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100E, and the rail R in this order on the concrete track slab 60. In the track pad 100E, the track pad 100E is fixed on the elastic member 10E so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20a coincides with the laying direction (longitudinal direction) of the rail R.

The elastic member 10E is a member provided with a plurality of grooves 11a extending in the laying direction of the rail R in order to obtain a predetermined spring property only on the upper surface of the flat plate-shaped member having elasticity, and is between the rail R and the tie plate 30. It is provided on the type rate 30 of the above, and is for absorbing the impact and vibration generated when a railroad vehicle or the like travels on the track. The material of the elastic member 10E is the same as that of the track pad 100 of the first embodiment described above.

The low friction sheet material 20a is formed in a band shape corresponding to the upper surface of the elastic member 10E in contact with the rail (that is, the upper surface of the plurality of ridges between the plurality of grooves 11a). The other configuration of the low friction sheet material 20a has the same configuration as that of the track pad 100 of the first embodiment described above.

As described above, according to the present embodiment, the track pad 100E includes an elastic member 10E and a low friction sheet material 20a. The elastic member 10E is provided with a plurality of grooves 11a extending in the laying direction of the rail R in order to obtain a predetermined spring property on the upper surface of the flat plate-shaped member having elasticity. Further, the rail support structure 200E is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100E, and the rail R in this order on the concrete track slab 60. In the track pad 100E, the track pad 100E is fixed on the elastic member 10E by vulcanization adhesion so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20a coincides with the laying direction of the rail R.

As a result, the same effect as that of the first embodiment described above can be obtained, and by providing a plurality of grooves 11a extending in the laying direction of the rail R on the upper surface of the elastic member 10E, the degree of freedom in design is increased, and a predetermined value is obtained. The springiness of can be obtained more easily.

FIG. 14 schematically shows the configuration of the track pad 100F according to the seventh embodiment of the present invention, in which FIG. 14A is a top view, FIG. 14B is a side view, and FIG. 14C is a side view. ) Is an end view. FIG. 15 shows a configuration example of the rail support structure 200F using the track pad 100F shown in FIG.

As shown in FIG. 14, the track pad 100F in the present embodiment is composed of an elastic member 10F and a plurality of low friction sheet materials 20a superimposed and fixed on the elastic member 10F. The low friction sheet material 20a is configured such that the upper surface thereof, which is the mounting surface of the rail R, has a low friction coefficient in at least one direction. The elastic member 10F and the low friction sheet material 20a are fixed to each other by vulcanization adhesion. The arrow A in FIG. 14 indicates the direction in which the friction coefficient is the lowest on the upper surface of the low friction sheet material 20a.

As shown in FIG. 15, the rail support structure 200F is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100F, and the rail R in this order on the concrete track slab 60. In the track pad 100F, the track pad 100F is fixed on the elastic member 10F so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20a coincides with the laying direction (longitudinal direction) of the rail R.

The elastic member 10F is provided with a plurality of grooves 11a extending in the laying direction of the rail R in order to obtain a predetermined spring property only on the upper surface of the flat plate-shaped member having elasticity, and is provided at the end edge of the surface on the rail R side. , A member provided with a chamfered portion 12 having a shape in which the ridge angle portion is scraped off, and is provided on the tie plate 30 between the rail R and the tie plate 30 when a railway vehicle or the like travels on the track. It is for absorbing the generated shock and vibration. The material of the elastic member 10F is the same as that of the track pad 100 of the first embodiment described above.

The low friction sheet material 20a is formed in a band shape corresponding to the upper surface of the elastic member 10F in contact with the rail (that is, the upper surface of the plurality of ridges between the plurality of grooves 11a). The other configuration of the low friction sheet material 20a has the same configuration as that of the track pad 100 of the first embodiment described above.

As described above, according to the present embodiment, the track pad 100F includes an elastic member 10F and a low friction sheet material 20a. The elastic member 10F is provided with a plurality of grooves 11a extending in the laying direction of the rail R in order to obtain a predetermined spring property on the upper surface of the flat plate-shaped member having elasticity, and at the edge of the surface on the rail R side. A chamfered portion 12 having a shape in which the ridge angle portion is scraped off is provided. Further, the rail support structure 200F is configured by arranging the cushioning material 50, the insulating plate 40, the tie plate 30, the track pad 100F, and the rail R in this order on the concrete track slab 60. In the track pad 100F, the track pad 100F is fixed on the elastic member 10F by vulcanization adhesion so that the direction having the low friction coefficient on the upper surface of the low friction sheet material 20a coincides with the laying direction of the rail R.

As a result, the same effect as that of the first embodiment described above can be obtained, and by providing a plurality of grooves 11a extending in the laying direction of the rail R on the upper surface of the elastic member 10F, the degree of freedom in design is increased, and a predetermined value is obtained. The springiness of can be obtained more easily. Further, by providing a chamfered portion 12 having a shape in which the ridge angle portion is scraped off at the edge portion of the surface on the rail R side, the deformation of the upper surface edge portion of the elastic member 10F by the rail R is suppressed and is suppressed. It is possible to prevent the edge portion of the low friction sheet material 20a from fraying.

In the above-described embodiment, the low-friction sheet materials 20 and 20a use a woven fabric or knitted fabric made of fluororesin fiber for one surface layer 21, and elastic members 10, 10A, 10B, 10C, 10D, 10E for the other surface layer 22. And the example of a plurality of layers using felt, woven fabric or knitted fabric made of fibers having good adhesion to 10F has been described, but the present invention is not limited thereto. As the low-friction sheet material, a woven fabric in which a fluororesin fiber and a high-strength fiber, for example, an aramid fiber, a carbon fiber, or a glass fiber is interwoven on one surface layer 21 may be used. Further, the low friction sheet material may be composed of, for example, a laminated sheet material in which a fluororesin sheet is used for one surface layer and a resin sheet having good adhesiveness to an elastic member is used for the other surface layer. Further, in order to improve the adhesiveness with the elastic member, the surface layer of the low friction sheet material may be treated with an RFL agent.

Further, as the low friction sheet material, a woven fabric or knitted fabric made of fluororesin fibers is used for one surface layer as in the case of the above-described embodiment, and elastic fibers such as polyurethane elastic yarns or PTT fibers and PET fibers are used for the other surface layer. It may be composed of a plurality of layers using a composite bimetal composite yarn or the like. If such the other surface layer is used, it will be well-adapted to the elastic member and will not easily peel off from each other.

Further, in the above-described embodiment, an example in which the track pads 100, 100A, 100B, 100C, 100D, 100E and 100F are arranged on the upper surface of the tie plate 30 has been described, but the present invention is not limited thereto. .. For example, the present invention can be applied even when sleepers are used instead of the tie plate 30. In this case, the track pads 100, 100A, 100B, 100C, 100D, 100E and 100F are arranged on the upper surface of the sleepers.

All of the above-described embodiments are exemplary and not limited to the present invention, and the present invention can be implemented in various other modifications and modifications. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

The track pad and rail support structure according to the present invention can be applied to rails of tracks of various means of transportation including railways, and is widely useful to society by improving the safety and maintainability of these means of transportation.

10, 10A, 10B, 10C, 10D, 10E, 10F Elastic member 11, 11a Groove 12 Chamfering part 20, 20a Low friction sheet material 30 Typerate 40 Insulation plate 50 Cushioning material 60 Concrete track slab 70 Fastening device 100, 100A, 100B , 100C, 100D, 100E, 100F Track pad 200, 200A, 200B, 200C, 200D, 200E, 200F Rail support structure B Fastening bolt B1 Mounting bolt R Rail

Claims (12)

A track pad interposed between a rail and a sleeper or a tie plate, comprising: a plate-shaped elastic member and a low-friction sheet material fixed on a surface of the elastic member in contact with the rail.
In the low friction sheet material, the upper surface serving as the mounting surface of the rail has a low friction coefficient in at least one direction, and the direction having the low friction coefficient of the upper surface coincides with the laying direction of the rail. Is fixed on the surface of the elastic member.
The elastic member has a plurality of grooves extending in the laying direction of the rail on the surface on the low friction sheet material side.
The track pad, wherein the low-friction sheet material is fixed in a band shape to the upper surface of a plurality of ridges between the plurality of grooves of the elastic member. The low-friction sheet material is characterized by being composed of a plurality of layers using a woven fabric or knitted fabric made of fluororesin fiber for one surface layer and a material having good adhesion to the elastic member for the other surface layer. The orbital pad according to claim 1. The track pad according to claim 2, wherein the other surface layer is a felt, woven fabric, or knitted fabric using fibers having good adhesiveness to the elastic member. The method according to any one of claims 1 to 3, wherein the elastic member has a plurality of grooves extending in the laying direction of the rail on a surface opposite to the low friction sheet material side. Orbit pad. The track pad according to any one of claims 1 to 4, wherein the elastic member is made of rubber or urethane. The track pad according to any one of claims 1 to 5, wherein the elastic member and the low friction sheet material are fixed by vulcanization adhesion. A rail support structure in which track pads and rails are sequentially fixed on a tie plate on a concrete track slab or on sleepers.
The track pad includes a plate-shaped elastic member and a low-friction sheet material fixed on a surface of the elastic member in contact with the rail.
In the low friction sheet material, the upper surface serving as the mounting surface of the rail has a low friction coefficient in at least one direction, and the direction having the low friction coefficient of the upper surface coincides with the laying direction of the rail. Is fixed on the surface of the elastic member.
The elastic member has a plurality of grooves extending in the laying direction of the rail on the surface on the low friction sheet material side.
The rail support structure is characterized in that the low friction sheet material is fixed in a band shape to the upper surface of a plurality of ridges between the plurality of grooves of the elastic member. The low-friction sheet material is characterized by being composed of a plurality of layers using a woven fabric or knitted fabric made of fluororesin fiber for one surface layer and a material having good adhesion to the elastic member for the other surface layer. The rail support structure according to claim 7. The rail support structure according to claim 8, wherein the other surface layer is a felt, woven fabric, or knitted fabric using fibers having good adhesiveness to the elastic member. The method according to any one of claims 7 to 9, wherein the elastic member has a plurality of grooves extending in the laying direction of the rail on a surface opposite to the low friction sheet material side. Rail support structure. The rail support structure according to any one of claims 7 to 10, wherein the elastic member is made of rubber or urethane. The rail support structure according to any one of claims 7 to 11, wherein the elastic member and the low friction sheet material are fixed by vulcanization adhesion.

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