JP2010255363A - Sleeper fastening structure of magnetic levitation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sleeper fastening structure of a magnetic levitation system capable of effectively absorbing, by a simple structure, displacement caused by the expansion and contraction of a rail by changes in temperature, and improving the vertical vibration absorbing performance of the rail and the sleeper. <P>SOLUTION: The sleeper fastening structure 1 of the magnetic levitation system fastens the sleeper 5 for the travelling rail 4 to a plurality of base plates 3 arranged on a roadbed 2 of a travelling track at intervals. A lower flange 5b of the sleeper 5 is placed on the base plates 3 by the intermediary of an elastic body 6 and a metal plate 7. The lower flange 5b of the sleeper 5 is pressed by a hold-down spring 8 serving as an urging means toward the base plates 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sleeper fastening structure for a magnetic levitation system that fastens sleepers for traveling rails on a plurality of base plates arranged at intervals on a roadbed of a traveling track such as a magnetically levitated vehicle and a magnetic transport device.

  In general, in a magnetic levitation system in which a vehicle (linear motor car) travels while magnetically levitating, the rail needs to be firmly fixed to sleepers. In such a case, the rail, sleepers, a fixing structure for fixing the rails to the sleepers, and the sleepers are fastened to the roadbed due to the expansion and contraction of the rails due to temperature changes and the displacement of the rails due to the deflection of the live load of the running track. An excessive load acts on the fastening structure. Therefore, for example, in the sleeper fastening structure shown in Patent Document 1, the axial displacement of the rail is absorbed between the sleepers and the roadbed of the traveling track.

That is, in the sleeper fastening structure of Patent Document 1, as shown in FIG. 4, a pair of left and right sleeper fastening structures (only one is shown) 50 fastens an H-shaped steel sleeper 51 on the roadbed 52 of the traveling track. Has been. The sleeper fastening structure 50 includes a pedestal 53 provided on the upper surface of the roadbed 52, a base plate 54 installed on the pedestal 53, and an anchor nut 55 embedded in the pedestal 53. The base plate 54 is fixed to the pedestal 53 by screwing 56.
The lower flange portion 51a of the sleeper 51 is placed on the base plate 54 via the rubber plate 57, and the sleeve 58 and the rubber tube 59 are accommodated on both sides in the width direction of the lower flange portion 51a. A hole (not shown) is formed. A rubber plate 60 and a washer 61 are placed on both sides of the lower flange portion 51a in the width direction. Therefore, when the fastening bolt 62 is screwed into the base plate 54 via the washer 61, the rubber plate 60, and the sleeve 58, the sleeper 51 is fastened. Note that a rail 63 is fastened on the upper flange portion 51 b of the sleeper 51.

In such a sleeper fastening structure 50, when the rail 63 expands and contracts due to a temperature change or when a live load is generated on the roadbed 52 of the traveling track, the rail 63 extends in the direction of the arrow X (rail axis direction) in FIG. The sleeper 51 is also displaced following the rail 63, and this displacement is absorbed by the elastic deformation of the rubber plates 57 and 60. Thereby, it is avoided that an excessive load is applied to the rail 63, the sleeper 51, and the sleeper fastening structure 50.
Further, the horizontal load applied when the rail 63 is displaced is shared by the upper and lower rubber plates 57 and 60 and the rubber cylinder 59, and the horizontal load transmitted to the lower rubber plate 57 is not via the fastening bolt 62 but the base plate. Since the horizontal load transmitted to the upper rubber plate 60 is also transmitted to the sleeve 58, the horizontal load on the fastening bolt 62 is reduced.
Further, when the displacement difference between the roadbed 52 and the rail 63 on the traveling track is increased and the force in the direction of the arrow X is increased, the sleepers 51 are rotated with respect to the roadbed 52 after being translated, The displacement difference is absorbed by the elastic deformation of the rubber plates 57 and 60 and the rubber cylinder 59, and the web portion 51c of the sleeper 51 is finally deformed to absorb the displacement difference.

JP-A-9-268506

  However, in the conventional sleeper fastening structure 50 described above, since it is necessary to provide an absorption structure at a plurality of locations in order to absorb displacement caused by expansion and contraction due to a temperature change of the rail 63, a large number of parts are used. However, there is a problem that the cost becomes high and the cost increases. Further, in the conventional sleeper fastening structure 50, the sleeper 51 slides at a plurality of locations such as the upper and lower surfaces of the lower rubber plate 57 and the lower surface of the upper rubber plate 60. However, it was difficult to prevent a change in performance by designing a sliding part. Furthermore, in the conventional sleeper fastening structure 50, since the vibration in the vertical direction of the rail 63 and the sleeper 51 is absorbed only by the lower rubber plate 57, the vibration absorption performance is insufficient, and the flying control performance and the vehicle There was a risk of a decrease in ride comfort.

  The present invention has been made in view of such a situation, and an object thereof is to effectively absorb a displacement caused by expansion and contraction due to a temperature change of the rail with a simple structure, and the upper and lower sides of the rail and sleepers. An object of the present invention is to provide a sleeper fastening structure for a magnetic levitation system capable of improving the vibration absorption performance in a direction.

  In order to solve the above-described problems of the prior art, the present invention relates to a sleeper fastening structure for a magnetic levitation system that fastens sleepers for running rails on a plurality of base plates arranged at intervals on a roadbed of a running track. The lower flange portion of the sleeper is placed on the base plate via an elastic body and a metal plate, and the lower flange portion of the sleeper is pressed toward the base plate by an urging means.

In the present invention, the metal plate is formed so as to protrude in the rail axis direction from the end of the lower flange portion of the sleeper, and when the metal plate is displaced in the rail axis direction, the tip of the metal plate in the rail axis direction It is preferable that the portion is configured to stop in contact with a stopper member provided on the base plate.
In the present invention, it is preferable that the biasing means is provided via a spacer.

  Furthermore, this invention is a track | orbit of the magnetic levitation system provided with the sleeper fastening structure of the said invention.

  As described above, the sleeper fastening structure of the magnetic levitation system according to the present invention fastens the sleepers for running rails on a plurality of base plates arranged at intervals on the roadbed of the running track, The lower flange portion of the tree is placed on the base plate via an elastic body and a metal plate, and the lower flange portion of the sleeper is pressed toward the base plate side by the urging means, so that the temperature change etc. Even when the rail expands and contracts, the sleeper can reliably absorb the displacement and stabilize the absorption performance by sliding on the metal plate in the rail axial direction. Moreover, in the sleeper fastening structure of this invention, since the location where a sleeper slides is specified, the change of absorption performance can be prevented by designing the part to slide. Furthermore, in the sleeper fastening structure of the present invention, the sleepers are elastically supported by the elastic body and the urging means, so that it is possible to give vibration absorption to the rails and sleepers. Moreover, since the urging force of the urging means can be adjusted, the necessary frictional force can be ensured by changing the frictional force between the elastic body and the metal plate.

  Further, in the present invention, the metal plate is formed to protrude in the rail axis direction from the end of the lower flange portion of the sleeper, and when the metal plate is displaced in the rail axis direction, the rail axis direction of the metal plate Since the front end of the metal plate is configured to stop in contact with the stopper member provided on the base plate, the metal plate does not come out of the lower flange portion of the sleeper during operation, and the displacement of the rail is prevented. The sleeper is surely slid. In addition, in the state where the tip of the metal plate in the rail axis direction is in contact with the stopper member, the vertical vibration of the rail and sleepers can be absorbed by the elastic deformation of the metal plate.

  Furthermore, in the present invention, since the biasing means is provided via a spacer, the fastening means for fixing the biasing means cannot be further tightened mechanically due to the presence of the spacer. Without the height management, the installation height of the urging means becomes constant, and the pressing force of the urging means does not vary depending on the tightening amount of the fastening means.

  In addition, since the present invention is a track of a magnetic levitation system including the sleeper fastening structure of the above invention, even if a displacement difference occurs between the rail and the roadbed due to a temperature difference, the displacement difference is caused by the sleeper fastening structure. It can absorb efficiently and can improve the vibration isolation effect of the track.

It is sectional drawing which shows the sleeper fastening structure of the magnetic levitation system which concerns on 1st Embodiment of this invention. It is an AA arrow directional view in FIG. It is sectional drawing which shows the sleeper fastening structure of the magnetic levitation system which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the sleeper fastening structure of the conventional magnetic levitation system.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
1 and 2 show a sleeper fastening structure of a magnetic levitation system according to a first embodiment of the present invention, FIG. 1 is a sectional view thereof, and FIG. 2 is a view taken along line AA in FIG. is there.
The sleeper fastening structure 1 according to the first embodiment of the present invention is applied to a track of a magnetic levitation system. As shown in FIGS. 1 and 2, the width direction (rail axis line) on the roadbed 2 of the traveling track is shown. A pair of base plates 3 arranged at regular intervals in a direction perpendicular to the direction), and a plurality of traveling rails 4 fastened on these base plates 3 and arranged at regular intervals along the roadbed 2 of the traveling track. Sleeper 5, rubber or resin-based elastic body 6 and metal plate 7 arranged in order from the bottom between the base plate 3 and the sleeper 5, and a presser spring (urging) that presses the sleeper 5 toward the base plate 3. Means) 8.

  The roadbed 2 is made of a material such as steel or PC concrete, and is provided so as to extend along the traveling direction of the vehicle (magnetic levitation type linear motor car). A plurality of screw holes 9 and 10 are provided for threading the screw portions of the fastening bolts. The base plate 3 is formed in a rectangular shape in plan view using a metal material, and bolt holes 12 through which the fastening bolts 11 are inserted are provided on both sides in the longitudinal direction (rail axis direction).

  The sleepers 5 are formed using a rigid H-type steel material or the like, and a pair of the sleepers 5 via the elastic body 6 and the metal plate 7 with the web portion 5c raised and the flange portions 5a and 5b positioned vertically. Is placed on the base plate 3. That is, the lower flange portion 5 b of the sleeper 5 is only placed on the upper surface of the metal plate 7. On the other hand, the lower flange portion 5 b of the sleeper 5 is pressed in the vertical direction toward the base plate 3 by the pressing spring 8. Therefore, when the travel rail 4 expands and contracts in the arrow X direction due to a temperature change, the sleepers 5 can absorb the displacement by sliding on the metal plate 7 in the rail axis direction in the same direction as the arrow X direction. It is configured to be possible. Therefore, as the presser spring 8, one having an elastic coefficient that allows the sleeper 5 to slide when the traveling rail 4 extends and contracts but can secure a necessary frictional force with the metal plate 7 is used. ing. A travel rail 4 extending along the travel track is fastened to the upper flange portion 5 a of the sleeper 5, and is installed over the sleeper 5.

  The elastic body 6 is formed using a rubber (or resin) plate-like body having approximately the same size as the lower flange portion 5 b of the sleeper 5 and is placed on the base plate 3. On the other hand, the metal plate 7 is made of a stainless steel plate for rust prevention, and is formed in a size protruding from the end of the lower flange portion 5b of the sleeper 5 in the rail axis direction. 6 is adhered to the upper surface of the plate. For this reason, in the sleeper fastening structure 1 of the present embodiment, when the metal plate 7 is displaced in the rail axis direction during the operation of the vehicle, the stopper provided on the base plate 3 with the tip end portion of the metal plate 7 in the rail axis direction. It is comprised so that it may contact and stop the fastening bolt 13 of a member. Even if the tip of the rail axis direction of the metal plate 7 comes into contact with the fastening bolt 13, the vertical movement of the base plate 2, the sleepers 5, etc. is followed by the elastic deformation of the protruding portion of the metal plate 7, and the vertical movement Can be absorbed.

The holding springs 8 are respectively arranged on both sides of the lower flange portion 5b of the sleeper 5 in the rail axial direction and above the lower flange portion 5b of the base plate 3 and the sleeper 5, and have both ends of the elastic plate-like body. By bending inward, the intermediate portion 8c is formed in a shape curved upward. The base end portion 8 a of the presser spring 8 extends vertically downward, and a part thereof is embedded and fixed in the upper surface of the base plate 3. Further, the distal end portion 8b of the presser spring 8 is bent and wound further inwardly from the intermediate portion 8c, and the curved portion abuts on the upper surface of the lower flange portion 5b of the sleeper 5, thereby the sleeper 5 The lower flange portion 5b is pressed downward in the vertical direction. Further, an insertion hole 14 through which a fastening bolt 13 for fixing the pressing spring 8 is inserted is formed in the intermediate portion 8 c of the pressing spring 8.
On the other hand, on both sides in the longitudinal direction of the base plate 3, bolt holes 15 through which the fastening bolts 13 are inserted are provided corresponding to the insertion holes 14 of the holding spring 8 and the screw holes 10 of the roadbed 2. Therefore, the fixing position of the base end portion 8 a of the presser spring 8 to the base plate 3 is set to a position where the intermediate portion 8 c does not interfere with the fastening bolt 11 between the two bolt holes 12 and 15.

  In order to fasten the sleepers 5 by the sleeper fastening structure 1 of the magnetic levitation system according to the first embodiment of the present invention thus configured, first, the base plate 3 is placed at a predetermined position on the roadbed 2 of the traveling track. The base plate 3 is fixed by screwing the fastening bolts 11 into the screw holes 9 of the roadbed 2 through the bolt holes 12 of the base plate 3. Next, the metal plate 7 with the elastic body 6 bonded to the lower surface is placed on the upper surface of the base plate 3, and the lower flange portion 5 b of the sleeper 5 is placed on the upper surface of the metal plate 7. Thereafter, the base end portion 8 a of the presser spring 8 is fixed to the upper surface of the base plate 3, the tip end portions 8 b of the presser springs 8 are placed on the upper surfaces on both sides of the lower flange portion 5 b of the sleeper 5, and the fastening bolts 13 are inserted through the insertion holes 14. If the screw holes 10 of the base plate 3 are screwed into the screw holes 10 of the base plate 2 and fixed, the sleepers 5 are slidably fastened on the base plate 2 and the base plate 3 via the elastic body 6 and the metal plate 7. (See FIG. 1).

In the sleeper fastening structure 1 of the first embodiment of the present invention, when the traveling rail 4 fastened to the upper flange portion 5a of the sleeper 5 is expanded and displaced in the direction of the arrow X in FIG. The traveling rail 4 receives a force in a direction in which the traveling rail 4 tends to be displaced. At this time, since the lower flange portion 5b of the sleeper 5 is only placed on the upper surface of the metal plate 7, the sleeper 5 slides on the upper surface of the metal plate 7 in the direction of the arrow X, and the sleeper 5 and the travel rail 4 displacements can be absorbed. Further, when the traveling rail 4 vibrates up and down, a force in the vertical direction acts on the sleepers 5. In this case, the lower flange portion 5 b of the sleeper 5 is disposed on the base plate 3 via the elastic body 6 and the metal plate 7 while being pressed by the pressing spring 8. When 8 is elastically deformed, it is possible to absorb vertical vibrations of the sleepers 5 and the traveling rails 4. In addition, in a state where the metal plate 7 is displaced in the rail axis direction and is brought into contact with the fastening bolt 13 and stopped, the top end portion of the metal plate 7 is elastically deformed, thereby further absorbing the vertical vibrations of the sleepers 5 and the traveling rail 4. It becomes possible.
Therefore, according to the sleeper fastening structure 1 of the present embodiment, the load applied to the traveling rail 4, the sleepers 5, the fastening bolts 11, 13 and the like can be greatly reduced.

[Second Embodiment]
FIG. 3 is a cross-sectional view showing a sleeper fastening structure of a magnetic levitation system according to a second embodiment of the present invention.
In the second embodiment, unlike the first embodiment, the holding spring 8 is tightened via a cylindrical spacer 16 through which the fastening bolt 13 is inserted. For this reason, the spacer 16 is disposed between the lower surface of the pressing spring 8 and the upper surface of the base plate 3. Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals.

  In the sleeper fastening structure 1 according to the second embodiment, when fastening the holding spring 8 with the fastening bolt 13, it is impossible to fasten the fastening bolt 13 beyond the length of the spacer 16 by interposing the spacer 16. The height of the presser spring 8 can be defined constant, and the presser force of the presser spring 8 does not vary depending on the tightening amount of the fastening bolt 13 and can be set constant. Other functions and effects are the same as those of the first embodiment.

While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.
For example, the presser spring 8 in the above-described embodiment is not limited to the shape of the present embodiment, and may be formed in an L-shaped cross section, and the lower flange portion 5b of the sleeper 5 is connected to the base plate 3 side. As long as it can be pressed toward the surface, any shape or biasing means of any configuration may be used. In the embodiment described above, the fastening bolt 13 is used as the stopper member. However, a stopper member for the metal plate 7 may be provided separately from the fastening bolt 13. Furthermore, the sleeper fastening structure 1 of the present invention can also be applied to a track such as a magnetic transfer device.

DESCRIPTION OF SYMBOLS 1 Sleeper fastening structure 2 Roadbed 3 Base plate 4 Rail for traveling 5 Sleeper 5a, 5b Flange part 6 Elastic body 7 Metal plate 8 Pressing spring (biasing means)
9, 10 Screw hole 11 Fastening bolt 12, 15 Bolt hole 13 Fastening bolt (stopper member)
14 insertion hole 16 spacer 50 sleeper fastening structure 51 sleeper 52 roadbed of running track 53 base 54 base plate 55 anchor nut 56,62 fastening bolt 57,60 rubber plate 58 sleeve 59 rubber cylinder 61 washer 63 rail

Claims (4)

In the sleeper fastening structure of the magnetic levitation system that fastens the sleeper for the traveling rail on the plurality of base plates arranged at intervals on the roadbed of the traveling track,
The lower flange portion of the sleeper is placed on the base plate via an elastic body and a metal plate, and the lower flange portion of the sleeper is pressed toward the base plate by an urging means. The sleeper fastening structure of the magnetic levitation system.   The metal plate is formed to protrude in the rail axis direction from the end of the lower flange portion of the sleeper, and when the metal plate is displaced in the rail axis direction, the tip end portion of the metal plate in the rail axis direction is the base plate. The sleeper fastening structure for a magnetic levitation system according to claim 1, wherein the structure is configured to stop in contact with a stopper member provided on the top.   The sleeper fastening structure for a magnetic levitation system according to claim 2, wherein the urging means is provided via a spacer. The track | orbit of the magnetic levitation system provided with the sleeper fastening structure in any one of Claims 1-3.

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