JP2911147B2 - Radial tires for floating vehicles - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a levitation type radial tire for use at the time of takeoff and landing of a linear motor car that floats and travels by the action of magnetism, for example.

(Prior art)

Currently, a magnetically levitated vehicle (hereinafter, referred to as a linear motor car) is being developed. In this linear motor car, the vehicle is lifted off the road surface by a magnetic force acting between the road surface and the vehicle, and a propulsive force is applied to the vehicle by a magnetic force acting between the side wall and the vehicle, thereby moving the vehicle along the guideway. In a non-contact state. Theoretically, the flying height may be about a few mm, but in consideration of the characteristics of Japan, which is an earthquake prone country, a strong magnetic field is created using superconductivity to achieve a flying height of about 100 mm. .

By the way, in such a linear motor car, it is necessary to support the vehicle on the road surface during takeoff and landing, and tires for the linear motor car have been developed.

As shown in FIG. 4, the load applied to the tire for the linear motor car changes with time. That is, at the start of takeoff, the levitation force gradually increases as the speed increases with the full load of the linear motor car, so that the load applied to the tires gradually decreases, and after takeoff, there is no load. In addition, at the time of landing, a load is gradually applied from the no-load state as the speed decreases, and the full load of the linear motor car is received after the landing.

In this linear motor car, a guide tire for guiding a running direction in which a rotation axis is set to a vertical direction is disposed on a side surface of the linear motor car, and is disposed corresponding to a side wall provided upright from a guide path. During low-speed running, when the linear motor car receives propulsive force, the guide tires contact the side walls and guide the running direction.

[Problems to be solved by the invention]

However, in the case of a linear motor car, it is necessary to provide individual support tires or guide tires for the vertical direction and the left and right direction, and the number of such tires is large and maintenance requires a lot of time.

In consideration of the above facts, the present invention shares the tires supporting the levitated vehicle and the guide tires for guiding the traveling direction during takeoff and landing of the levitated vehicle, so that the total number of tires installed on the levitated vehicle It is an object of the present invention to provide a radial tire for a levitation type vehicle capable of reducing the number of the tires to half of the current value.

[Means for solving the problem]

The radial tire for a floating vehicle according to the present invention is a tire for a floating vehicle that supports a load that gradually changes from a full load state to a no-load state during takeoff and landing, and has one or more layers constituting a carcass part. The cords of the ply cord layer are arranged substantially in the radial direction, and a radial tire is used in which a belt layer including a plurality of reinforcing cord layers is arranged between a tread portion and a carcass portion, and floats on a side wall of the tire. A guide portion facing the side wall that guides the traveling of the type vehicle, and a guide portion having a flat surface in contact with the side wall is provided, and irregularities for reducing the rigidity of the guide portion are provided on a contact surface of the guide portion with the side wall. Features.

[Action]

According to the present invention, since the guide portion is provided on the side of the tire supporting the levitated vehicle, and the guide portion guides the traveling direction of the levitated vehicle, it is necessary to separately provide a dedicated tire for guiding the traveling direction. And the total number of tires can be reduced.

In addition, since the guide portion is provided with unevenness on a plane that comes into contact with the side wall, the rigidity of the guide portion is reduced, and the guide portion is not damaged by contact with the side wall, and the durability can be maintained. .

〔Example〕

FIG. 1 shows a linear motor car 10 to which the present invention is applied.
It is shown. The linear motor car 10 is a radial tire 14 for a floating vehicle (hereinafter referred to as a tire 14) on a guideway 12.
Is supported through. The guide path 12 has side walls 16 and 18 erected respectively corresponding to both side surfaces of the linear motor car 10.

On the surface of the guideway 12, a levitation coil 22 is laid, and the superconducting magnet 24 installed in the linear motor car 10 is provided.
The linear motor car 10 itself can be lifted about 100 mm with respect to the guide path 12 by the magnetic force acting between the linear motor car 10 and the guide path 12. Further, a propulsion guide coil 26 is attached to the side walls 16, 18, and the linear motor car 10 is driven by a magnetic force acting between the superconducting magnet 24 installed on the linear motor car 10.
Is to be promoted.

Here, the floating of the linear motor car 10 is performed in a state where the speed reaches a predetermined speed. When the speed is lower than the predetermined speed, the linear motor car 10 is supported by the tire 14. That is, the tire 14 has a role as a support for the linear motor car 10 necessary at the time of take-off and landing of the linear motor car 10. A guide portion 36 is formed on a side portion of the tire 14 so as to face the side walls 16 and 18. The guide 36 is in contact with the side walls 16, 18. During normal running, the tire 14 is moved in the direction of arrow A in FIG. 1 and is stored in a storage section (not shown).

As shown in FIG. 2, the guide portion of the tire 14
The shape of the portion where the 36 is formed is convex in the direction of the side walls 16 and 18 with respect to the outline of the normal tire (see the imaginary line in FIG. 2),
The protruding tip surface 38 is flat and comes into contact with the side walls 16, 18. As a result, the linear motor car 10 runs while being guided by the side walls 16 and 18.

Meanwhile, a predetermined block pattern is formed on the distal end surface 38 of the guide portion 36, as shown in FIG. This block pattern is formed by a plurality of projections 42 formed around the axis of the tire 14 and having a rectangular shape as viewed from the front in FIG.
It has the function of reducing the sliding resistance between the side walls 16 and 18. That is, the rigidity of the guide portion is reduced by forming this block pattern (projection portion 42).

A rubber pad 46 is stretched between the bead portions 44 of the tire 14 to prevent the tire 14 from coming off the rim of the foil (not shown) due to a lateral load applied to the guide portion 36.

 The operation of the present embodiment will be described below.

First, a change in load applied to the tire 14 when the linear motor car 10 takes off will be described.

As shown in FIG. 4, when the linear motor car 10 takes off, the load at the start (time t = 0) is the load at the time of stopping the vehicle (vehicle weight, that is, 100% load). When the linear motor car 10 starts running due to the magnetic force acting between the superconducting magnet 24 and the propulsion guide coil 26, the magnetic force (levitation force) acting between the superconducting magnet 24 and the levitation coil 22
Gradually increases, and gradually decreases because the load applied to the tire 14 is obtained by subtracting the magnetic levitation force from the vehicle weight. Furthermore, when the vehicle speed is gradually increased and reaches a certain speed, the load applied to the tires 14 becomes zero, and finally the linear motor car 10 floats about 100 mm above the surface of the guideway 12 so that the vehicle can run at high speed. Become.

Next, a change in load applied to the tire 14 when the linear motor car 10 lands will be described.

As shown in FIG. 4, the load is zero immediately before the start of landing, but the value is obtained by subtracting the magnetic levitation force at the landing speed from the vehicle weight at the time of landing, and the magnetic levitation force decreases when the vehicle further decelerates. When the linear motor car 10 is completely stopped, the load applied to the tire 14 is increased, and the load at the time of stopping the vehicle (vehicle weight, that is, 100% load) is applied to the tire 14. In this manner, the linear motor car 10 can land smoothly without impact by occupant by landing while gradually increasing the load.

Here, in the linear motor car 10 of the present embodiment, the traveling direction is guided by the guide portion 36 formed on the side of the tire 14.

In other words, the linear motor car 10
The block pattern (projection 42) formed on the side wall 1
Drive while contacting 6,18. For this reason, the linear motor car 10 and the side walls 16 and 18 can always travel at a constant interval. Further, even if there is a curve on the traveling path, the guide portion 36 is guided by the side walls 16 and 18, so that the vehicle can be smoothly driven along the curve.

In addition, since the protruding portion 42 is formed on the distal end surface 38, the guiding portion
The rigidity of 36 is low, and the guide portion 36 is not damaged by sliding with the side walls 16 and 18, and can travel without any trouble.

As described above, in the present embodiment, the tire that supports the linear motor car 10 and the tire that guides the traveling direction can be shared, so that the total number of tires applied to one linear motor car 10 can be reduced, and maintenance can be performed. Workability can be improved.

In the present embodiment, the block pattern formed on the distal end surface 38 of the guide portion 36 is a rectangular protrusion 42.
Other patterns may be used, such as forming a plurality of grooves in the radial direction. Further, in the present embodiment, the side wall is
5, the step 50 is formed at a position corresponding to the upper guide portion 36 on the side walls 16 and 18, as shown in FIG.
You may make it contact 6 and 18.

〔The invention's effect〕

As described above, the floating tire for a levitated vehicle according to the present invention is used for a levitated vehicle by sharing a tire for supporting the levitated vehicle and a guide tire for guiding a traveling direction during takeoff and landing of the levitated vehicle. Has an excellent effect that the total number of tires installed in the vehicle can be reduced.

[Brief description of the drawings]

1 is a front view of a linear motor car, FIG. 2 is an enlarged sectional view of a side portion of a tire, FIG. 3 is a front view showing a block pattern of a guide portion, and FIG. FIG. 5 is a front view showing a modified example of the state of contact with the side wall of the guide portion. 10 ... Linear motor car, 14 ... Radial tire for floating vehicle, 36 ... Guide part, 38 ... Tip surface, 40 ... Block pattern.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masayoshi Azakami 38-8 Hikaricho, Kokubunji-shi, Tokyo 38 Inside the Railway Technical Research Institute (56) References JP-A-61-81207 (JP, A) Open Sho 62-1605 (JP, A) Actual open Sho 49-7602 (JP, U) Japanese Patent Publication No. 57-9970 (JP, B2) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60C 13 / 00 B61B 13/06

Claims (1)

(57) [Claims] In a floating vehicle tire that supports a load that gradually changes from a full load state to a no-load state during take-off and landing, the cord of one or more ply cord layers constituting a carcass part is substantially radial. Radial tire having a belt layer composed of a plurality of reinforcing cord layers arranged between a tread portion and a carcass portion, the side portion guiding a traveling of a levitated vehicle on a side portion of the tire. And a guide portion having a flat surface in contact with the side wall, and irregularities for reducing the rigidity of the guide portion are provided on a contact surface of the guide portion with the side wall.