JPH04143301A - Track for attracting magnetic levitation type vehicle - Google Patents

Abstract

PURPOSE:To absorb the thermal expansion and contraction of a rail by forming a part of a diagonal member plate for connecting and fixing a horizontal plate for rail support to a vertical plate fixing to a track girder, for a rail supporter along the laid direction of the track girder, into a deformed sectional form. CONSTITUTION:A horizontal plate 21 for rail support is fixed to the lower end of the boom 42 of a rail support body 2, and a vertical plate is fixed to the standing wall surface 12 of a track girder through a filler layer 5. Then, the horizontal plate 21 is connected and fixed to the vertical plate 22 so as to be mutually right-angled by a diagonal plate 23 having, on the upper part, a deformed sectional taper part 24 having a tapered section thick on the outside end and thin on the inside end, supporting a rail 4 as the support body 2. The diagonal plate 23 is deflected and deformed to the thermal expansion and contraction of the rail to move the horizontal plate 21. Thus, the expansion and contraction by thermal change of the rail 4 can be absorbed while keeping the vertical rigidity.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a track for a suction type magnetically levitated vehicle, and more specifically, the present invention locks a track for a suction type magnetically levitated vehicle, and more specifically, the present invention locks a track for a magnetically levitated vehicle. This invention relates to a track structure that prevents vibrations in the rails and absorbs deflections in the rail installation direction, especially deflections due to thermal expansion and contraction, which are a problem in practice.

[Prior Art] A traveling system for an attraction type magnetically levitated vehicle has a levitation electromagnet on the vehicle side facing the underside of a rail laid on the ground side, and magnetic levitation formed between the electromagnet and the rail. A circuit attracts and raises a vehicle-side electromagnet against the rail to obtain a floating blade for the vehicle. Typical means for running a vehicle include a secondary reaction plate provided on the upper surface of the rail and a primary side on the vehicle side, or one that utilizes the thrust of a near motor. This traveling system is often commonly referred to as a linear motor car.

Track systems include the so-called one-beam system, in which rails are laid on both sides of a track girder with two tracks, and the so-called two-beam system, in which rails are provided inside a pair of parallel track girders.

FIG. 3 and FIG. 4 show a typical example of the structure of the vehicle side and the track side that constitute the travel system of the so-called one-beam magnetically levitated vehicle.

In these figures, reference numeral 101 denotes a hollow box-shaped track girder made of concrete, which is usually continuously installed in units of a fixed length in the direction of vehicle travel on the ground or on an elevated structure.

Reference numerals 102 are so-called sleepers, which are made of H-shaped steel or the like that are long in the transverse direction of the track, and are arranged in large numbers at regular intervals in the track direction (vehicle running direction).
03.103 is fixed to the upper surface of the track girder 101.

Both ends of this sleeper 102 are provided so as to slightly project laterally from the side ends of the track girder 101, and a rail 104 is fixed to the upper surface of the projecting tip.

The rail 104 shown in this example includes an inverted U-shaped rail body 104a and an arm 104b extending from the side of the rail body 104a.
This is a typical rail structure in an attraction type magnetic levitation traveling system, and this arm 104b is fastened and fixed to the sleeper 102, such as the above-mentioned H-shaped steel, with bolts.

Reference numeral 105 indicates a running vehicle body, and on the left and right sides of the lower part thereof, modules 106 and 106 each having a U-shaped cross section are equipped with a floating blade and a mechanism for obtaining running thrust between the rails and an independent suspension mechanism (not shown). The system is supported by a system that guarantees the spatial position and posture freedom among the modules, vehicles, and rails required during travel.

107.107 is an electromagnet for magnetic levitation mounted on the lower beam part of the module 106, and this electromagnet is attached to a U-shaped iron facing below the main body of the rail 104 fixedly laid on the ground side. It consists of a coil wound around a core. Such an inverted U-shaped rail 104 and an electromagnet 107 having a U-shaped iron core, which face-to-face type is known as a traveling system that does not require a guiding electromagnetic device in order to generate a guiding force in the lateral direction of the track. It is being

The primary side of the linear motor facing the upper surface of the rail body 104a is mounted on the upper beam part of the module.
It is provided on the upper surface of the motor 04a and cooperates with the secondary side reaction plate of the near motor to generate thrust to the vehicle.

Reference numeral 108 denotes a current collector provided at the bottom of the module 106, which collects current between it and the trolley wire 109 on the ground side.

By the way, in the above-mentioned track structure, the spacing between the rail support points of the sleepers is relatively long, so flexure appears in the middle area of the sleepers, causing vibrations of the rails and sleepers, which causes problems in magnetic levitation vehicles. In the traveling system, there is a problem in that there is a possibility that fluctuations in the flying gap may occur which cannot be ignored. In addition, the presence of sleepers makes it difficult to create suitable passageways for work and emergency evacuation, and when vehicles are running at high speeds, eddy currents occur in the space beneath the vehicle, which causes air resistance and noise. Since there are problems such as the troublesome adjustment of the position and posture of the rail, a solution to these problems has been desired.

In order to solve the above-mentioned problems, the present applicant has already proposed several structures for a traveling system and a track for an attraction type magnetically levitated vehicle, and an example thereof will be explained based on FIG. 2.

Figure 2 is a diagram explaining the support structure of the track girder and rail.
01 is a track girder, which is made of concrete and has a box-like shape, with a flat top surface 211, and a vertical wall surface 212 that protrudes slightly outward at the top, and a vertical wall surface 212 that retracts slightly inward at the bottom of this vertical wall surface 212. It consists of a surface 213.

202 is a rail support member, and this rail support member 2
02 is a horizontal plate 221 for supporting a rail that is almost horizontal, and a fixed plate that is welded to one side edge of the horizontal plate 221 to form an inverted shape and has a relatively wide width in the direction in which the track girder extends. It consists of a perpendicular plate 222 for use as a guide, and a reinforcing flange 223 that connects and reinforces these perpendicular surfaces in a perpendicular posture to both sides.

This rail support member 202 is supported by four anchor bolts 203 that loosely fit through bolt holes 224 formed in a vertical plate 222, as shown in FIGS. 2(a) and 2(b).
), it is fixed to the track girder 201.

Additionally, jack bolts 233 are screwed through the vertical plate 222 of the rail support member 202 at four points near its periphery, and the attitude of the rail support member 202 can be adjusted by adjusting the screwing amount of the jack bolts 233. It looks like this.

204 is a rail, an inverted U-shaped rail main body 241
and an arm 242 extending from the side edge of the rail body 241 toward the track girder. In addition, the rail body 241
A secondary reaction plate 243 of the linear motor is fixed to the upper surface of the motor by welding.

The arm 242 of this rail 204 is placed on the horizontal plate 221 of the rail support member 202, and three rails are attached to each rail support member 202 using bolts.
34, they are firmly fixed and integrated.

Note that the surface of this vertical plate 222 facing the track girder and the vertical wall surface 212 of the track girder to which the above-mentioned rail support member 202 is fixed.
Serrated notches 214 and 225 are provided in order to improve shear resistance during fixation.

Further, 205 is a filler layer inserted and filled between the vertical wall surface 212 and the vertical plate 222 to reinforce the shear resistance.

In this way, the long rail 204 is supported by a large number of rail support members 202 fixed to the side surface of the track girder 201.

The rail 204 fixedly supported by the rail support member 202 having the above configuration is engaged with and supported by the horizontal plate 221 over a relatively long area in the rail extension direction as described above, so it is different from the conventional method. Compared to the case where the rail is supported by sleepers (see FIG. 3), the rigidity of the rail support is increased, and the support strength and durability of the rail are improved.

In addition, the deflection deformation of the rail as a whole is smaller (especially the rail deflection deformation between the rail support members is smaller than that of the conventional rail, so the postural stability of the rail is improved.
This has the advantage of improving controllability in the travel system of an attraction magnetic levitation vehicle with a relatively small levitation gap.

[Problems to be Solved by the Invention] By the way, in such a track structure, thermal expansion and contraction of the rail due to temperature difference often becomes a problem in its implementation.

That is, this is because the rail support member 202 that fixes the rail is affected by the load in the rail laying direction due to the thermal expansion and contraction of the rail, and this problem cannot be ignored, especially in environments with large temperature differences.

However, in order to prevent vibrations of the rails and sleepers, it is necessary to sufficiently increase the vertical deflection rigidity of the rails. To meet this requirement, the thickness of the reinforcing flange 223 must be increased, or It is desirable to use a material with a high quality. With this structure, it is difficult to absorb and alleviate the effects of thermal expansion and contraction of the rail, resulting in the following problems.

In other words, since the rails are firmly fixed with bolts at intervals of several meters, differences in temperature between the rail support members can cause a bimetallic effect between the steel rail and the concrete track girder, causing rail deflection. This results in a decrease in the accuracy of rail laying.

Furthermore, even if the difference in temperature is not that large, repeated relatively small deflections will cause slippage in the rail fixing bolts, which will lead to wear and loosening of the bolt connection surface, which will cause the bolts to thicken (if they become new). It may become a source of rail vibration.

An object of the present invention is to solve the problems of the conventional rail support structure as described above, and to create a structure that can absorb thermal expansion and contraction, which is a problem in the rail extension direction, while maintaining the deflection rigidity in the vertical direction of the rail. An object of the present invention is to provide a track for an attraction type magnetic levitation vehicle.

[Means for Solving the Problems] Features of the track for an attraction type magnetically levitated vehicle of the present invention that achieves the above object include a track girder extending in the vehicle running direction as a platform for laying the rails; It includes a long rail laid along the extending direction of the track girder at a position away from the side surface of the track girder, and a large number of rail supports arranged at multiple points along the extending direction. So, the above rail is
The rail support has a rail body that forms a magnetic circuit for magnetically levitating the vehicle together with a vehicle-side electromagnet facing from below, and an overhang arm that extends from the side edge of the rail body in the direction of the track girder. is a horizontal plate for supporting the rail that is fixed to the lower surface of the rail overhanging arm over a wide range in the above-mentioned laying direction, and fixed to the track girder that is fixed to the side surface of the above-mentioned track girder over a wide range in the above-mentioned extending direction. and a diagonal plate that connects and fixes the horizontal plate and the vertical plate in a vertical position. This is because at least a portion of the modified cross-sectional shape portion has a narrow thickness near the portion thereof.

[Operations] By having the above-described structure, the track for an attraction type magnetically levitated vehicle of the present invention maintains support strength in the vertical direction, and also has low deflection rigidity of the rail support in the rail laying direction. Therefore, there is an effect that the thermal expansion and contraction of the rail can be absorbed by the deflection deformation of the diagonal plate.

[Example] The present invention will be described in detail below based on an example shown in the drawings.

Embodiment 1 FIG. 1 is a sectional view illustrating the support structure of the track girder and rail in this embodiment. Reference numeral 1 indicates the track girder, which is made of concrete and has a box shape, for example, with a flat top surface 11 and a side surface. It is formed as a structure having a vertical wall surface 12.

Reference numeral 2 denotes a rail support body, and this rail support body 2 includes a horizontal plate 21 for supporting a rail that is approximately horizontal, and this horizontal plate 21 is independent, and is connected to the track girder 1 through a filling agent layer 5. A vertical plate 22 for fixing vertically fixed, and the horizontal plate 21
and a diagonal plate 23 (gusset plate 23) that connects and fixes the two plates in a position perpendicular to the vertical plate 22.

In this embodiment, unlike the conventional example shown in FIG. 2,
The horizontal plate 21 and the vertical plate 22 are provided independently from each other and are connected and fixed via the diagonal plate 23, so even with the same structure, it is possible to absorb and alleviate relatively small deflections in the rail installation direction. can.

In this embodiment, the vertical plate 22 is made of a substantially rectangular steel plate, as shown in FIG.
In addition, a bolt hole 28 for an anchor bolt is provided approximately at the bottom of the shaft.

The rail support 2 is secured to the track girder 1 by means of three anchor bolts 3 loosely fitted through the bolt holes 28 through the vertical plate 22, as shown in FIGS. 1(a) and 1(b). is firmly attached to powerful countries.

The shape of the vertical plate 22 may be arbitrary, such as the lower half shape of an ellipse with the long axis in the direction of track girder extension as shown in FIG. 2(b), or the lower half shape of a semicircle. It's fine to use one. Further, the position and number of bolt holes 28 may be arbitrary as long as the vertical plate 22 can be firmly fixed to the side surface of the track girder.

A rail 4 includes an inverted U-shaped rail body 41 and an overhanging arm 42 extending from the side edge of the rail body 41 in the direction of the track girder. A secondary side action plate 43 of the lever motor is fixed to the upper surface of the rail main body 41 by welding.

The extending arm 42 of this rail 4 is placed on the horizontal plate 21, and in this embodiment, two rails per one rail support 2 are attached to the horizontal plate 21 by bolts 34.
It is firmly fixed and integrated.

The upper surface of the bolt 34 for mounting the horizontal plate 21 on the rail is recessed so that the head of the bolt 34 does not protrude from the upper surface of the horizontal plate 21. This is because the upper surface of the horizontal plate 21 for supporting the rail is used as a sliding surface for the skid (not shown) of the vehicle side module.
This was devised to eliminate protrusions that could be an obstacle.

In this embodiment, the vertical wall surface 12 and the vertical plate 22 of the track girder l
A large number of small-diameter blind holes are provided in the facing surface 14.25 of the vertical plate 22, similar to the saw-toothed notches 214.225 shown in FIG. When fixed to the side of the track girder, it works to increase the shear resistance.

Reference numeral 5 denotes a filler layer interposed and filled between the vertical wall surface 12 and the vertical plate 22, which closely contacts the blind hole and effectively withstands the shearing force acting downwardly on the rail support 2. In this example, a mortar mixed with carbon fiber is used to reinforce the shear resistance.

In this embodiment, the gusset plate 23 is a plate-shaped diagonal member whose perspective view is shown in FIG.
A horizontal plate 21 and a vertical plate 22 are supported at right angles to each other. In this embodiment, the upper end surface 26 of the gusset plate 23 is welded and fixed to the lower surface of the horizontal plate 21, and the side end surface 27 of the gusset plate 23 is welded and fixed to the outer side of the track girder of the vertical plate 22.

Further, a substantially rectangular tapered portion 24 having a tapered cross-sectional shape is provided at the upper part of the gusset plate 23.

This tapered portion 24 has the widest thickness at the farthest part (outside end 24a) from the track girder 1, as shown in FIG. , it has a tapered shape with the narrowest thickness at the part closest to the track girder 1 (inner end 24b). Therefore, the gusset plate 23 of this embodiment has low bending rigidity particularly in the rail extending direction at this tapered portion 24, and is easier to bend in the rail extending direction than a normal plate diagonal member whose cross section is entirely rectangular. It has become. Therefore, when a load is applied in the B direction due to thermal expansion and contraction as shown in Fig. 1(c), the gusset plate 2
3 bends in the direction B, and the upper end of the gusset plate 23 moves to the dotted line position 23', and accordingly, the horizontal plate 21 for supporting the rail also moves to the dotted line position 21', absorbing the expansion and contraction of the rail 4 due to thermal changes, etc. be able to.

Furthermore, the rail 4 supported by the rail support body 2 having the above configuration is engaged with and supported by the horizontal plate 21 over a relatively long area in the rail extension direction, as in the conventional example described above. , it is possible to maintain rail support rigidity equivalent to that of conventional rail support members.

Additionally, compared to the conventional sleeper system, there are advantages such as improved rail postural stability and improved controllability.

Note that the cross-sectional shape of the gusset plate 23 is desirably changed steplessly in order to avoid stress concentration.

[Effects of the Invention] As explained above, the track for an attraction type magnetically levitated vehicle of the present invention includes a horizontal plate for supporting the rail and a vertical plate for fixing to the rail, which is independent of the horizontal plate. are connected and fixed by a diagonal plate, and at least a part of the second diagonal plate is provided with a part with a modified cross-section that has a wide thickness in a part far from the track girder and a narrow thickness in a part close to the track girder. It is characterized by the use of a rail support, which lowers the rigidity against loads in the rail installation direction, which has the effect of absorbing expansion and contraction of the rail due to thermal changes, etc.

Furthermore, since sufficient vertical rigidity can be maintained, this has the effect of preventing rail vibration, improving the postural stability of the rail, and improving the controllability of the traveling system.

Furthermore, in the case of a one-beam type track, there is an effect that the upper surface of the track girder can be used as a passage for maintenance inspection and emergency evacuation, and there is also an effect that it is easy to adjust the position and attitude of the rail.

Furthermore, compared to conventional examples using sleepers, it has the effect of preventing the generation of eddy currents during high-speed driving and reducing noise and air resistance.

[Brief explanation of drawings]

FIG. 1(a) is a partial cross-sectional view of the track showing an outline of the configuration of the rail support mode of Embodiment 1, FIG. 1(b) is a side view of the same, and FIG.
Figure (c) is a plan view of the same. FIG. 1(d) is a perspective view of a gusset plate used in Example 1, and FIG. 1(e) is a sectional view taken along A-All in FIG. 1(d). FIG. 2(a) is a sectional view for explaining the structure of a track using a reinforcing flange as a rail support member, and FIG. 2(b) is a side view of the same. FIG. 3 is a side view for explaining the structure of a conventional track using sleepers. FIG. 4(a) is a partial cross-sectional view showing the relationship between the rail 4 of the conventional field track and the traveling body, and FIG. 4(b) is a plan view for explaining the deflection of the rail in the conventional support mode. be. 1: Track girder 2: Rail support 3:
Anchor bolt 4: Rail 5: Filler layer 11: Track girder top surface 12: Track girder vertical wall surface 14: 21: 22: 23: 24: 26: 28 = 34: 42: 50: 21': 23': 24a: Increment Vertical gusset plate (diagonal plate) for fixing the horizontal plate for supporting the rail.Tapered part 25: Upper end surface of the notched section 27: Side end bolt hole bolt extension arm 43: Reaction plate nut 51: Mounting is for supporting the screw rail Moving position of the horizontal plate Moving position of the gusset plate Outer end 24b = Inside function 4 people Diagram (Q) (b) 24-24b Diagram

Claims (1)

[Claims] 1. A track girder extending in the vehicle running direction as a platform for laying the rail, and a track girder laid along the extending direction of the track girder at a position away from the side surface of the track girder. The rail is equipped with a long rail and a plurality of rail supports arranged at multiple points along the extension direction, and the rail has a magnetic field for magnetically levitating the vehicle together with a vehicle-side electromagnet opposed from below. It has a rail body that forms a circuit, and an overhanging arm that overhangs from the side edge of the rail body in the direction of the track girder, and the rail support body has a rail support that extends over a wide range in the laying direction on the lower surface of the rail overhang arm. A horizontal plate for supporting the rail to be fixed, a vertical plate for fixing to the track girder that is fixed to the side surface of the track girder in a wide range in the extension direction, and a horizontal plate and a vertical plate perpendicular to these. The diagonal plate has a diagonal plate that is connected and fixed in a posture, and the diagonal plate has at least a portion of the modified cross-sectional shape that has a wide thickness at a portion far from the track girder and a narrow thickness at a portion close to the track girder. A track for an attraction type magnetic levitation vehicle, characterized by being provided in a. 2. A track for an attraction type magnetically levitated vehicle according to claim 1, wherein the cross-sectional area of the diagonal plate has a variable cross-sectional area that changes steplessly.