JP2014009468A - Slide plate, and floor plate for turnout - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide plate capable of maintaining stable sliding performance over a long term, being excellent in impregnation workability, and not melting even when snow melting heater is used, and a floor plate for a turnout using the slide plate.SOLUTION: A turnout includes: a base plate 2 for placing and fixing a stock rail 4 on a top face 20; and a slide plate 3 fixed on the top face 20 side of the base plate 2 and slidably placing and supporting a tongue rail 5 on the top face 20 of the base plate 2. A metallic powder sintered layer 32 is formed by laminating sintered copper alloy powder containing a dispersed solid lubricant on a top face 310 of a checkered steel plate 31 having the top face 310 where a plurality of projections 311 are formed, applying a sintering treatment to the laminated sintered copper alloy powder, and then rolling it. The metallic powder sintered layer 32 is impregnated with a dissolved lubricating resin having a melting point of 100 degrees or higher and 200 degrees or lower. There are PE(polyethylene) and PP(polypropylene) as such a lubricating resin.

Description

  The present invention relates to a sliding plate suitable for sliding support of a tongrel and a self-lubricating floor plate for a branching device using the sliding plate.

  Patent Document 1 discloses a branch board for a branching device that can maintain a stable sliding performance for a long period of time, thereby reducing the frequency of maintenance and inspection work. The floor plate for a branching device includes a substrate for mounting and fixing the basic rail, and a sliding plate that is fixed to the substrate and is slidably supported by mounting the tongrel.

  The sliding plate includes a steel plate having an upper surface on which a plurality of uneven portions are formed, and a metal powder sintered layer formed on the upper surface of the steel plate. Here, the metal powder sintered layer is formed on the upper surface of the steel sheet as follows. That is, after sintering and sintering the powder of the alloy for sintering on the upper surface of a steel plate, it rolls. Thereafter, the metal powder sintered layer is impregnated with a lubricating resin having excellent weather resistance such as PTFE (polytetrafluoroethylene), PFA (perfluoroalkoxyalkane), PAI (polyamideimide), PI (polyimide).

  Since the metal powder sintered layer formed on the convex portion on the upper surface of the steel plate is compressed at a high pressure, the sintered density is high, and the impact resistance, load resistance, and wear resistance are excellent. On the other hand, since the sintered layer formed on the concave portion on the upper surface of the steel sheet is compressed at a lower pressure than the metal powder sintered layer on the convex portion, the sintered density is low and the impregnation ratio of the lubricating resin is high. Excellent lubricity. Here, PTFE, PFA, and PAI exemplified as the lubricating resin have a melting point of 300 degrees or more, and PI is a thermosetting type and has no melting point. For this reason, for example, in a floor board for a branching device installed on a track in a heavy snow region, the sliding plate may be heated to nearly 100 degrees by a snow melting heater, but even in such a case, the lubricating resin melts. There is no flow out of the sliding plate. Therefore, since stable sliding performance can be maintained over a long period of time, the frequency of maintenance and inspection work can be reduced, and the burden on workers can be reduced.

JP-A-9-221701

  However, in the floorboard for a branching device described in Patent Document 1, when PTFE, PFA, or PAI is used as the lubricating resin, at least each of these is impregnated when the metal powder sintered layer of the sliding plate is impregnated. It must be melted by heating to the melting point, that is, to a high temperature of 300 ° C. or higher. Further, when PI is used as a lubricating resin, when the metal powder sintered layer of the sliding plate is impregnated with PI, it must be cured at least to a curing temperature, that is, to a high temperature of 350 ° C. or more. Don't be.

  Therefore, when PTFE, PFA, PAI, or PI exemplified in Patent Document 1 is used as the lubricating resin, it is necessary to heat to 300 ° C. or higher in the impregnation work, and workability is poor. In particular, when it becomes necessary to replenish the sliding plate with a lubricating resin during maintenance and inspection work of the branching device floor board installed on the track, the lubricating resin must be heated to a high temperature of 300 ° C. or more on site. The impregnation work is difficult.

  The present invention has been made in view of the above circumstances, and the object thereof is to maintain stable sliding performance over a long period of time and to have good impregnation workability when a snow melting heater is used. Another object of the present invention is to provide a sliding plate that does not melt and a floor plate for a branching device using the sliding plate.

  In order to solve the above problems, in the present invention, a lubricating resin having a melting point of about 100 to 200 degrees is used as the lubricating resin impregnated in the sintered metal powder layer of the sliding plate. Examples of such a lubricating resin include PE (polyethylene) and PP (polypropylene).

For example, the sliding plate of the present invention is
A steel plate having an upper surface on which a plurality of convex portions or concave portions are formed;
A metal powder sintered layer formed on the upper surface of the steel plate,
In the metal powder sintered layer,
A lubricating resin having a melting point of 100 degrees or more and 200 degrees or less is impregnated.

Moreover, the floor board for a branching device of the present invention is
A substrate for mounting and fixing the basic rail on one side;
And the above-described sliding plate for slidably supporting the Tongrel on one surface side of the basic rail.

  According to the present invention, since the lubricating resin having a melting point of about 100 to 200 degrees is used as the lubricating resin impregnated in the sintered layer of the sliding plate, the lubricating resin is melted by heating the snow melting heater. Thus, the possibility of flowing out of the sintered layer is low. Further, the impregnation operation can be performed at a lower temperature than when PTFE, PFA, PAI, and PI are used as the lubricating resin. Therefore, a sliding plate that can maintain stable sliding performance over a long period of time, has good impregnation workability, and does not melt even when a snow melting heater is used, and this sliding plate are used. It is possible to provide a floor board for a turnout.

FIG. 1 (A) is a front view of a branch board 1 according to an embodiment of the present invention, and FIG. 1 (B) is a top view of the branch board 1 according to an embodiment of the present invention. is there. 2A is a top view of the sliding plate 3, and FIG. 2B is a cross-sectional view taken along the line AA of the sliding plate 3 shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 (A) is a front view of a branch board 1 according to the present embodiment, and FIG. 1 (B) is a top view of the branch board 1 according to the present embodiment. In these drawings, these are indicated by dotted lines so that the arrangement of the basic rail 4, the tongrel 5 and the rail press 6 on the branching device floor board 1 can be easily grasped.

  The branching device floor board 1 according to the present embodiment is used as a self-lubricating floor board at an installation point of a branching machine on a railway track. As shown in the figure, the branching device floor plate 1 according to the present embodiment is fixed on a substrate 2 for mounting and fixing the basic rail 4 on one surface (upper surface) 20, and on the upper surface 20 of the substrate 2, And a sliding plate 3 for slidably mounting and supporting the Tongrel 5 on the upper surface 20 side of the substrate 2.

  Two grooves (a basic rail fixing groove 24 and a sliding plate fixing groove 25) extending from one side surface 22 along the longitudinal direction to the other side surface 23 are formed in parallel on the upper surface 20 of the substrate 2. ing. The basic rail fixing groove 24 accommodates the bottom 41 of the basic rail 4. The sliding plate fixing groove 25 accommodates the sliding plate 3 so that the upper surface 30 of the sliding plate 3 is exposed from the upper surface 20 of the substrate 2.

  Further, on the upper surface 20 of the substrate 2, the side from the one side 22 of the substrate 2 to the other side 23 is opposite to the side on which the sliding plate fixing groove 25 is formed with respect to the basic rail fixing groove 24. A rail press fixing groove 26 is formed obliquely with respect to the basic rail fixing groove 24. In addition, a bolt support hole 27 that penetrates the upper surface 20 and the lower surface 21 of the substrate 2 is formed in the substrate 2. While bringing the rail press 6 into contact with the bottom 41 of the basic rail 4 mounted on the bottom surface 242 of the basic rail fixing groove 24 from the side opposite to the side on which the tongue rail 5 is mounted with respect to the basic rail 4, By engaging the flange 61 of the rail press 6 with the rail press fixing groove 26, the rail press 6 is fixed in the direction D in which the distance between the rail press fixing groove 26 and the basic rail fixing groove 24 becomes narrow. When sliding along the groove 26, the rail press 6 supports the abdomen 41 of the basic rail 4 from the side opposite to the side on which the tongue rail 5 is placed with respect to the basic rail 4, and the wedge action causes the basic The bottom 41 of the rail 4 is pressed against one side surface (side surface on the sliding plate fixing groove 25 side) 241 of the basic rail fixing groove 24. Thereby, the fall of the basic rail 4 is prevented. In this state, the base rail 4 is firmly fixed to the substrate 2 by bolting the rail press 6 to the substrate 2 using the bolt support holes 27.

  Also, a plurality of bolt holes 29 for fixing the branching device floor plate 1 to the installation point are formed at both ends 28 in the width direction of the substrate 2 from the upper surface 20 to the lower surface 21 of the substrate 2.

  The sliding plate 3 has a length W2 that is narrower than the length W1 of the substrate 2. Therefore, when the sliding plate 3 is accommodated in the sliding plate fixing groove 25 of the substrate 2, both side surfaces of the substrate 2 are provided. The bottom surface 251 of the sliding plate fixing groove 25 is partially exposed on the 22 and 23 side. Using this exposed portion, the sliding plate 3 is fixed to the substrate 2 by fillet welding.

  2A is a top view of the sliding plate 3, and FIG. 2B is a cross-sectional view taken along the line AA of the sliding plate 3 shown in FIG.

  As illustrated, the sliding plate 3 includes a striped steel plate 31 having an upper surface 310 on which a plurality of convex portions 311 are formed, and a metal powder sintered layer 32 formed on the upper surface 310 of the striped steel plate 31. .

  The metal powder sintered layer 32 is formed on the upper surface 310 of the striped steel plate 31 as follows. That is, a mixed powder in which a solid lubricant such as graphite, PTFE (polytetrafluoroethylene), molybdenum disulfide (MoS2), or the like is mixed into a metal powder is spread on the upper surface 310 of the striped steel plate 31. Next, the mixed powder spread on the upper surface 310 of the striped steel plate 31 is sintered and then rolled by a sintering process. Thereby, the metal powder sintered layer 32 which is a metal sintered layer in which the solid lubricant is dispersed is formed on the upper surface 310 of the striped steel plate 31. Then, the metal powder sintered layer 32 is melted and impregnated with a lubricating resin.

  Here, various constituent materials can be used for the mixed powder, including bronze-based materials composed of copper, tin, graphite and the like. In particular, a mixed powder composed of 4 to 10% by weight of tin, 10 to 40% by weight of nickel, 0.1 to 4% by weight of phosphorus, 3 to 10% by weight of graphite, and the balance copper is a metal exhibiting the best sliding performance. A sintered layer can be realized.

  Moreover, what has melting | fusing point of 100 degree | times or more and 200 degrees or less is used for lubricating resin. Examples of such lubricating resins include PE (polyethylene) and PP (polypropylene). In addition, solid lubricants such as graphite, PTFE, and molybdenum disulfide may be dispersed and blended in the lubricating resin.

  Since the metal powder sintered layer 32 formed on the convex portion 311 of the upper surface 310 of the striped steel plate 31 is compressed at a high pressure by rolling, the sintered density is high, and impact resistance, load resistance, wear resistance are high. Excellent. On the other hand, the metal powder sintered layer 32 formed on the concave portion (portion not the convex portion 311) 312 of the upper surface 310 of the striped steel plate 31 is rolled at a lower pressure than the metal powder sintered layer 32 on the convex portion 311. Since it is compressed, the sintered density is low, the impregnation rate of the lubricating resin is high, and the lubricity is excellent. Furthermore, the metal powder sintered layer 32 contains a solid lubricant such as graphite in a dispersed manner. For this reason, the Tongrel 5 can be slidably supported stably over a long period of time without causing plastic deformation or the like with respect to the impact load applied to the Tongrel 5 when passing through the train.

  Further, as the lubricating resin impregnated in the metal powder sintered layer 32, a lubricating resin having a melting point of 100 degrees or more and 200 degrees or less, such as PE or PP, is used. Even when heated to near a degree, the possibility that the lubricating resin melts and flows out of the metal powder sintered layer 32 is low. In addition, since the impregnation work can be performed at a lower temperature than when PTFE, PFA, PAI, and PI are used as the lubricating resin, the manufacturing efficiency is good and the repair workability at the time of maintenance inspection is also excellent.

  Therefore, according to the present embodiment, a sliding plate 3 that can maintain stable sliding performance over a long period of time and has good workability, and a branch plate 1 using the sliding plate 3 are provided. it can.

  In the above embodiment, the case where the striped steel plate 31 is used as the back material of the metal powder sintered layer 32 of the sliding plate 3 has been described. However, the present invention is not limited to this. The backing material of the metal powder sintered layer 32 may be a steel plate having an upper surface on which a plurality of convex portions or concave portions are formed.

  Further, in the above embodiment, the case where the metal powder sintered layer 32 in which the solid lubricant is dispersed is described, but it is not always necessary to disperse the solid lubricant. A tie layer may be used.

  1: Floor board for turnout, 2: Substrate, 3: Sliding plate, 4: Basic rail, 5: Tongreil, 6: Rail press, 20: Upper surface of substrate 2, 21: Lower surface of substrate 2, 22: Substrate 2 One side surface along the longitudinal direction, 23: the other side surface along the longitudinal direction of the substrate 2, 24: a groove for fixing a basic rail, 25: a groove for fixing a sliding plate, 26: a groove for fixing a rail press, 27: Bolt support holes 28: Both end portions of the substrate 2, 29: Bolt holes, 30: Upper surface of the sliding plate 3, 31: Striped steel plate, 32: Sintered metal powder layer, 41: Bottom portion of the basic rail 4, 42: Basic Abdominal portion of rail 4, 61: collar portion of rail press 6, 241: side surface of basic rail fixing groove 24, 242: bottom surface of basic rail fixing groove 24, 251: bottom surface of sliding plate fixing groove 25, 310: The upper surface of the striped steel plate 311: 311: Convex part of the upper surface 310 of the striped steel sheet 312, 312: Concave part of the upper surface 310 of the striped steel sheet 31

Claims (5)

A steel plate having an upper surface on which a plurality of convex portions or concave portions are formed;
A metal powder sintered layer formed on the upper surface of the steel plate,
In the metal powder sintered layer,
A sliding plate characterized by being impregnated with a lubricating resin having a melting point of 100 ° to 200 °. The sliding plate according to claim 1,
The sliding resin characterized in that the lubricating resin is one of polyethylene and polypropylene. The sliding plate according to claim 1 or 2,
A sliding plate, wherein a solid lubricant is dispersed in the lubricating resin. The sliding plate according to any one of claims 1 to 3,
A sliding plate, wherein a solid lubricant is dispersed in the metal powder sintered layer. A substrate for mounting and fixing the basic rail on one side;
The sliding plate according to any one of claims 1 to 4, wherein the sliding plate is fixed to the substrate and slidably supports the Tongrel on one surface side of the substrate. Floor board for turnout.

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