JPH053481B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a track structure in a track vehicle system. In particular, the present invention relates to a track structure for a suspended railway that uses cables as the main structural component to maintain strength and rigidity.

Prior Art In a track vehicle system, a lightweight track structure is desired from the viewpoint of improving the economic efficiency of construction, and in urban areas, it is desired that overhead structures be as small as possible due to issues such as aesthetics and sunlight. From this point of view, the ropeway seems fit for purpose. In fact, since the cables of ropeways have elasticity, they have the advantage of low noise during travel and good riding comfort. However, in a ropeway, the cables hang down between the pylons, so the vehicle rises when passing the pylons and descends between the pylons, causing vertical movement, making it unsuitable for high-speed travel. In addition, since the cable surface, which is the rolling surface of the wheel, is not flat, there is a disadvantage that the contact pressure of the wheel increases locally, resulting in large wear of the wheel.

Japanese Patent Publication No. 58-55281 discloses a cable-based suspended track structure suitable for mass transportation. As shown in Figures 2 and 3, this track structure supports both the dead load, which is the weight of the track structure itself, and the live load, which is the weight of the vehicles, by means of support cables 1 stretched in a catenary shape. is configured to do so. The rail 2 used for running the vehicle 5 is
It is supported by a support cable 1 via a hanger 3. The track structure with this configuration is supported above the ground surface by the steel tower 4.

As shown in FIG. 3, the rail 2 has a structure in which two conveyor cables are arranged in parallel, connected to each other, and covered with a rail cover 8, and the two rails of this structure are connected in parallel by a bracket 9. is maintained. The bracket 9 is then connected to the support cable 1 by the track hanger 3. The track cover 8 is
The upper surface is a flat surface, and the wheels of the vehicle roll on this upper surface. Since the conveyance cable 7 is bent due to the weight of the vehicle, the rail cover 8 needs to be able to follow this bending of the cable 7.

The track structure with this configuration maintains its strength and rigidity with support cables, making it lightweight and low cost, and it is also easy to increase the span between support towers, making it economical and useful for crossing rivers and valleys. It has the advantage of being highly adaptable to different terrains. Furthermore, since it is a cable structure, it has elasticity and can simplify the suspension system of the vehicle, as well as making less noise during running and providing a good ride. However, since the carrying cable supports the vehicle on its upper surface, giving this carrying cable a large upward camber,
The tension makes it difficult to apply large tension to the hanger. Therefore, the rigidity is insufficient, and it becomes difficult to reduce the deflection of the transport cable due to the live load.

Furthermore, although a curved road is essential to a track structure, the above-mentioned Japanese Patent Publication does not teach anything about how to configure a curved road.

Problems to be Solved by the Invention The present invention solves the above-mentioned problems in the conventional cable suspension railway track structure.

That is, the present invention does not lose the advantages of cable structures, such as lightweight track structures, low construction costs, large spans between support towers, good terrain adaptability, and good riding comfort. The purpose is to eliminate the drawback of not being able to apply sufficient tension to the hanger.

Another object of the present invention is to obtain a curved track structure suitable for cable suspension railways.

Means for Solving the Problems The present invention focuses on the fact that the cause of the above-mentioned problem of insufficient rigidity is excessive deflection and curvature of the structure, and develops a structure that can increase the rigidity. It is completed. That is, the structural feature of the present invention is that a stiffening cable having an upward camber is connected to a hanger that hangs something below the support cable, and tension is constantly applied to the hanger by the tension of this stiffening cable. This is what I did. In addition, another feature of the present invention is that, at the position of the tower supporting the cable, the support cable is fixed to the tower, and the stiffening cable is connected to a floating beam provided at the middle part of the tower in the height direction, The floating beam has a curved shape corresponding to the curved track, is connected to the support cable by a vertically rigid member, and is movable vertically with respect to the tower, but is limited in displacement in the horizontal direction of the track. The rail is connected to the tower, and the rail is formed in a curved shape corresponding to the curved track at a portion located below the curved floating beam, and is supported by the floating beam.

Effects According to the above configuration of the present invention, the stiffening cable having an upward camber is coupled to the hanger coupled to the support cable, and tension is constantly applied to the hanger, so the rigidity of the entire structure is increased. , excessive deflection can be eliminated. Also,
The floating beam installed at the position of the tower was shaped to correspond to the curved road, and the rails were also connected to the floating beam at a position below the floating beam with a curved shape corresponding to the curved road.
The curved portion of the rail can be stably supported.

Embodiment FIG. 1 shows a typical embodiment of the invention. The track structure shown in the figure has a support cable 10 stretched between steel towers 21, and this support cable 10 is in a downwardly slack form between the steel towers 21. A downwardly extending hanger 11 is coupled to the support cable 10 at appropriate intervals, and an upwardly directed camber, that is, an upwardly convex stiffening cable 12 is coupled to the lower end of the hanger 11. The reinforcing cable 12 is stretched between the steel towers 21 with tension, and the tension acts to constantly apply tension to the hanger 11 and the support cable 10. A track 15 is connected to the stiffening cable 12 via a track hanger 16. A vehicle 17 runs on a track 15.

The general structures L ₁ and L ₂ having such a structure are arranged continuously across the tower section M having the steel tower 21, and the station section N having the station structure 24 at an appropriate position is arranged in series.
will be provided. One end of each of the support cable 10 and the stiffening cable 12 of the track structure is coupled to the station structure 24 of the station part N, so that the track structure is supported by the station structure. In tower M, tower 2
The floating beam 22 is located at the middle part of the height direction of 1.
A floating beam 22 is connected to the support cable 10 by a vertical rod 23.
Further, a steel tower 21 is also provided in the curved section C, and a curved floating beam 22c is arranged at the middle part of this steel tower 21 in the height direction, and this curved floating beam 22c is also connected to the support cable 10 by a vertical rod 23. ing.

FIG. 4 shows details of the orbit 15. Orbit 15 is
Two rails 13 consisting of a steel running rail piece 13a with an I-shaped cross section and a guide rail piece 26 provided on one side of the running rail piece 13a are arranged in parallel and connected to each other with a bracket 14. . The lower end of a track hanger 16 is connected to this bracket 14. A linear motor reaction rail conductor 27 is attached to the lower surface of each rail 13. The upper surface of the rail 13 constitutes a running surface.

The vehicle 17 has a bogie frame 18 provided on the upper part of the vehicle body.
The bogie frame 18 has a pair of running wheels 19;
A pair of guide wheels 20 are also supported.
The running wheel 19 is arranged so as to roll on the upper surface of each of the pair of running rail pieces 13+, and the guide wheel 20 is arranged so as to roll on the guide surface formed on the side surface of the guide rail 26. . The bogie frame 18 is provided with a linear induction motor primary coil 25 corresponding to the reaction rail conductor 27 attached to the lower surface of the rail 13.

6 to 8 show the details of the curved section C. The support cable 10 is stretched over the top 32 of the above-mentioned steel tower 21, and in the middle part of the steel tower 21 there is a curved floating A beam 22c is provided. A stiffening cable 12 is fixed to the floating beam 22c, and the floating beam 22c is further connected to the support cable 10 by a vertically rigid rod 23.
In this example, the rod 23 is pin-coupled at its upper and lower ends to the support cable 10 and the floating beam 22c, respectively. That is, a bracket 30 is provided on the support cable 10, and a bracket 31 is provided on the floating beam 22c, and the upper and lower ends of the rod are connected to these brackets by pins.

In the general structure, the tension of the stiffening cable 12 acts to constantly apply tension to the hanger 11 and the support cable 10. Tower part M and curved part C
In this case, the reaction force of the tension of the stiffening cable 12 acts on the rod 23 as a compressive force. By providing such a stiffening cable 12, the rigidity of the general structure can be dramatically increased. In the tower section M and the curved section C, rigidity is provided only by the support cable 10.

As shown in FIG. 7, the curved floating beam 22c is formed into a curved shape corresponding to the shape of the curved road,
Below this curved floating beam 22c, the rail 13 also has a similar curved shape, and the rail 13 is connected to the floating beam 22c by a track hanger 16.
Since the support cable 10 is fixed to the top 32 of the steel tower 21, its movement in the lateral direction is restrained, but the floating beam 22c is not restrained in the lateral direction. Therefore, a means is required to prevent excessive lateral displacement of the floating beam 22c. In this embodiment, as shown in FIGS. 6 and 8, an arm 29 is provided on the floating beam 22c, and a lateral rod 2
One end of the rod 28 is connected with a pin, and the other end of the rod 28 is connected with a pin to the steel tower 21. With this configuration, floating beam 2
The displacement in the vertical direction of 2 is not restricted, but the displacement in the lateral direction can be restricted. If the rod 28 is sufficiently long, the displacement of the floating beam 22c in the track length direction can be sufficiently tolerated.

9 and 10 show an example in which the present invention is applied to a long curved road, in which a large number of steel towers 21 are arranged at appropriate intervals along the curved road, and a floating structure is installed at the position of each steel tower 21. It has a configuration in which beams 22c are arranged substantially continuously.

Effects As described above, in the present invention, a stiffening cable having an upwardly convex camber is coupled to a hanger coupled to a support cable, and arranged so as to constantly apply tension to the hanger and the support cable. As a result, the rigidity of the cable structure, which bears both dead and live loads, is dramatically increased compared to conventional devices. In addition, for curved roads, a tower is provided to support the cables, a floating beam is provided to this tower to connect the stiffening cable, and this floating beam is curved to the shape of the curved road, and this floating beam is Although it is movable, it is connected to the tower so that lateral displacement is restrained, and this floating beam also supports a rail with a shape that corresponds to the shape of the curved track, so it is possible to use curved tracks in cable suspension railways. It becomes possible to support stably.

[Brief explanation of the drawing]

Fig. 1 is a side view of a cable suspension railway showing an embodiment of the present invention, Fig. 2 is a side view showing a conventional structure, and Fig. 3 is a perspective view showing an example of rails in the conventional structure. , FIG. 4 is a front view showing details of the track in the embodiment of the present invention, FIG. 5 is a side view showing details of the curved track structure, and FIG. 6 is a front view of the curved track structure of FIG. Fig. 7 is a plan view of the part shown in Fig. 6, Fig. 8 is a sectional view of the curved floating beam, and Fig. 9 is a plan view of the part shown in Fig. 6.
The figure is a plan view showing an example in which the present invention is applied to a long curved road, and FIG. 10 is a side view of the embodiment of FIG. 9. 10...Support cable, 11...Hanger, 1
2... Stiffening cable, 13... Rail, 13a...
Expansion joint, 14... Bracket, 15... Track, 16... Track hanger, 17... Vehicle,
21... Steel tower, 22... Floating beam, 22c... Curved floating beam, 24... Station structure.

Claims (1)

[Claims] 1. A support cable that is stretched like a catenary between the towers arranged at intervals and supports both dead load and live load, a hanger that hangs things below the support cable, and a hanger that is connected to the hanger and that The structure is such that the strength and rigidity are maintained by a stiffening cable that is stretched to have a camber of said brackets are supported by track hangers depending from said stiffening cable, said tower is disposed on said curved track section, said support cable is fixed to said tower at said tower position, said support cable is fixed to said tower and said The stiffening cable is connected to a curved floating beam provided at the middle part of the tower in the height direction, and the curved floating beam has a planar shape corresponding to the curved track, and both ends thereof connect to the curved floating beam through vertical rigid members. The rail is connected to a support cable and is connected to the tower so as to be movable vertically relative to the tower but limited in displacement laterally to the track, and the rail is located below the curved floating beam. A curved track structure for a cable suspension railway, characterized in that the curved track structure is formed in a curved shape corresponding to a curved track at a portion where the curved line is curved, and is supported by the curved floating beam.