JP2972287B2 - Track girder structure of branching device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a track girder structure of a branching device, and more particularly to a track girder structure of a branching device suitable for a magnetically levitated vehicle track having a U-shaped cross section. Things.

[Conventional technology]

Conventionally, in a track girder constituting a branching device, a side wall having a U-shaped cross section and a floor panel are integrally formed of concrete, or a side wall is formed of a concrete panel only. There is known a side wall beam type made of PC concrete which is manufactured independently. In these track girders, a ground coil is attached to a side wall, and an electromagnetic force is generated between the side wall and a superconducting magnet of the vehicle to propel (travel) and levitate the vehicle. The propulsion and levitation of the vehicle in the track girder are both strong magnetic field phenomena. Therefore, when a metal material is used as the material of the track girder, the metal material is magnetized to generate an attractive force between the track girder and the vehicle body, thereby canceling a part of the electromagnetic force for propulsion and levitation. . In consideration of the situation where the magnetic drag occurs as described above, regarding the material constituting the track girder,
It was common to use concrete.

In addition, Japanese Patent Application Laid-Open Nos. 59-134202 and 63-272801, etc., are related to this type of track girder structure.

[Problems to be solved by the invention]

In the above prior art, when using concrete, the running resistance during vehicle running, i.e., the magnetic resistance, also occurs with respect to the induced current generated in the reinforcing bars installed in the concrete, or the metal fixtures that support and fix the concrete panel and the side wall beams. There was a problem of becoming drag. Further, in the above prior art, sufficient consideration was not given to reducing the weight of the track girder and improving the accuracy of the entire track girder obtained by factory production, including the portion made of concrete. When the weight of the track girder is heavy, an increase in the size of the driving device and an increase in the turning time due to this are expected. Also, maintenance of the branching device including the driving device may be complicated and require a great deal of time and labor. Further, when the entire track girder is made of concrete, it is difficult to improve the dimensional accuracy of each part, and there is a possibility that the riding comfort of the vehicle may be degraded when the vehicle is traveling at a high speed or running on a curve.

An object of the present invention is to provide a track girder structure of a branching device capable of achieving a reduction in magnetic drag and a reduction in weight of the track girder itself.

[Means for solving the problem]

In order to achieve the above object, a longitudinal member that is disposed to extend in the longitudinal direction of the track girder, and that is configured with an insulating material interposed in the longitudinal direction of the track girder, A cross beam extending in the width direction of the cross beam, a side column extending in a vertical direction to the cross beam, a floor member formed of the longitudinal member and a non-magnetic material installed on the cross beam, and And a side wall member made of a non-magnetic material and installed at the center side of the track girder of the column.

[Action]

Even if the longitudinal members, cross beams, and side pillars are made of a metal material, a floor panel member and a side wall member made of a non-magnetic material are installed in a portion of these members facing the vehicle side, so that the vehicle is used to carry the members. The magnetic force on the member can be shielded, and the magnetic drag can be reduced.

Further, the longitudinal members, the cross beams, and the side columns are used as main strength members of the track girder, and a floor panel member and a side wall member made of a non-magnetic material are installed on these members, so that the entire track girder is provided. Can be reduced in weight as compared with the case where is made of concrete. In other words, concrete has some strength against compressive force, but it tends to cause defects such as cracks against tensile force, and it is necessary to increase its thickness to secure sufficient strength. is there. This leads to an increase in the overall weight of the track girder.
On the other hand, when the longitudinal members, cross beams and side columns are made of a metal material and used as a strength member, the metal material has sufficient rigidity against a compressive force and a tensile force by considering its structure. Can be secured and the weight can be made relatively light. Therefore, the weight of the entire track girder can be reduced by using the longitudinal members, the cross beams, and the side columns.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, reference numerals 1a and 1b denote track girder having a U-shaped cross section and constituting a branching device. The track girder 1a, 1
b is connected at its longitudinal end via a pin whose axis is arranged vertically. Therefore, the connecting portion of each connecting girder 1a, 1b is configured to be rotatable about a vertical axis,
By moving these connected track girders 1a and 1b in the horizontal direction, the branching device performs a switching operation. In addition, the branching device usually has the above-mentioned track girder of 8 to
It is configured by connecting about 10 cables. Numeral 2 is a longitudinal member that is arranged to be drawn in the longitudinal direction of each of the track girder 1a, 1b (hereinafter, for convenience of description, the code is set to "1" when corresponding to each track girder). In addition, they are arranged in parallel in the width direction of the track girder 1 at a predetermined interval, and they are connected to each other. The interval between the longitudinal members 2 is a size corresponding to a traveling road surface of the vehicle described later. Also,
The longitudinal member 2 is divided at a constant pitch in the longitudinal direction, and is connected in an electrically insulated state with an insulating material 3 interposed between flanges provided at respective divided end portions. The pitch of the insulating material 3 installed on the longitudinal member 2 is determined by the state of eddy current generation and the number of manufacturing steps, and is shorter than the longitudinal dimension of the track girder 1. It is about the length of the division. 4
Numeral denotes a cross beam extending to the side surface of the longitudinal member 2 in the width direction of the track girder and attached by welding. At the tip of the cross beam 4, a side pillar 5 is provided extending vertically upward. The cross beam 4 and the side pillar 5 may be integrally formed,
Alternatively, they may be formed separately and joined. The longitudinal members 2, the cross beams 4 and the side pillars 5 are formed in a box-shaped cross section in consideration of improvement in strength and weight reduction of the longitudinal members 2, the track frame 6 having a substantially U-shaped cross section in the width direction. Is configured. Reference numeral 7 denotes a traveling roadbed which is installed on the upper surface of each of the longitudinal members 2 so as to extend in the longitudinal direction of the track girder. The traveling roadbed 7 is made of a non-magnetic material such as concrete, and has a function of shielding magnetism. Further, each of the traveling roadbeds 7 is manufactured by a pretension method, and has a structure in which the load imposed on the longitudinal member 2 is reduced. Each traveling roadbed 7 has an expansion joint 8 at its longitudinal end, and is connected to an adjacent one through the expansion joint 8. The expansion joint 8
Is made of reinforced plastic. By the way, the traveling roadbeds 7 are installed at predetermined intervals in the width direction of the track girder, and the dimensions thereof correspond to the intervals of the traveling wheels of the vehicle traveling on the track girder. In addition, the longitudinal member 2
Also corresponds to the distance between the running wheels of the vehicle traveling on the track girder. Reference numeral 9 denotes a floor panel installed between the traveling roadbed 7 and the upper surface of the cross beam 4 at a position lateral to the traveling roadbed 7. The floor panel 9 is made of a non-magnetic material, for example, concrete, similarly to the traveling roadbed 7, and has a function of shielding magnetism. The longitudinal end of the floor panel 9 in the vehicle body is formed so as to fit with an adjacent one. The traveling roadbed 7 and the floor panel 9
Is a floor panel member.

Reference numeral 10 denotes a side wall panel which is vertically installed on the upper portion of the cross beam 4 and whose outer surface, that is, the outer surface in the width direction of the track girder is fixed to the side pillar 5 by screwing. The side wall panel 10 is made of a non-magnetic material, for example, concrete, like the traveling roadbed 7 and the floor panel 9, and has a function of shielding magnetism. The fabrication of the side wall panel 10 is also performed by a pretension method. Reference numeral 11 denotes a coil unit which is installed on the inner side surface of the side wall panel 10, that is, the inner surface in the width direction of the track girder via a fastening member such as a bolt. The coil unit 11 incorporates a levitation coil 12 and a propulsion coil 13 corresponding to a superconducting magnet mounted on a vehicle, and is made of concrete. Reference numeral 14 denotes a guide plate installed on an upper portion of the inner side surface of the side wall panel 10, and is installed corresponding to a guide wheel of a vehicle. The guide plate 14 is made of a non-magnetic material, for example, reinforced plastic.

In the track girder 1 configured as described above, the horizontal load applied to the side wall panel 10 via the coil unit 11 when the vehicle travels is borne by the plurality of side columns 5, the cross beams 4, and the longitudinal members 2. The vertical load of the side wall panel 10 is borne by the cross beam 4. The own weight of the traveling roadbed 7 and the floor panel 9 as the floor members and the vertical load when the vehicle travels are borne by the cross beams 4 and the longitudinal members 2. Thus, the track girder 1
Has a structure in which the weight of each member and the load during traveling of the vehicle are finally borne by the track frame 6 made of a metal material.

According to such a configuration, the portion of each track girder 1 that opposes the vehicle, that is, the traveling roadbed 7, floor panel 9, side wall panel 10,
The coil unit 11 and the guide plate 14 are each made of a non-magnetic material, and the track frame 6 made of a metallic material is installed outside thereof. That is, the magnetic force transmitted from the superconducting magnet mounted on the vehicle to the track frame 6 is shielded by each member made of the non-magnetic material, and the eddy current generated in the track frame 6 by the magnetic force is reduced. it can. Therefore, the magnetic drag generated when the track frame 6 is magnetized by the superconducting magnet mounted on the vehicle can be reduced. In addition, the longitudinal member 2 that is arranged to be drawn in the traveling direction of the vehicle has a structure in which the insulating members 3 are interposed at a predetermined pitch in the longitudinal direction, and thus the superconducting magnet mounted on the vehicle is used. As a result, the length of the portion where the eddy current is generated in the vehicle traveling direction can be reduced, and the eddy current can be reduced. From this, the magnetic drag during running of the vehicle can be reduced. Further, by dividing the longitudinal member 2 in the vehicle traveling direction by the insulating material 3 as described above, the cross beams 4 and the side columns 5 attached to the longitudinal member 2 are also electrically divided and insulated in the vehicle traveling direction. Will be.
Thereby, the influence of the eddy current generated in the cross beams 4 and the side columns 5 can be reduced.

Further, the floor member, the side wall panel 10 and the coil unit 11 are not manufactured by casting in place,
Since the production is carried out in a factory with a mass production system, the dimensional accuracy of each can be improved. On the other hand, the track frame 6 is manufactured by forming the longitudinal members 2, the cross beams 3, and the side columns 5 from a metal material, and joining them. Therefore, the track frame 6 can also improve its own dimensional accuracy. As described above, the dimensional accuracy of each member constituting the track girder 1 can be improved, so that when the vehicle travels on the track girder 1, vibration caused by a dimensional error of each member can be reduced, and Comfort can be improved.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the track girder structure of the branching device which can achieve reduction of magnetic drag and weight reduction of the track girder itself can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a track structure according to the present invention, and FIG. 2 is a perspective view showing a track frame in the track structure of FIG. 1a, 1b… track girder, 2… vertical stringer, 4… cross beam, 5…
Side pillars, 6 ... Track frame, 7 ... Roadbed, 9 ... Floor panel, 10 ... Side wall panel, 11 ... Coil unit,

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Iwamoto ▲ Sho ▼ 794, Higashi-Toyoi, Kazamatsu-shi, Yamaguchi Prefecture Inside Hitachi Kasado Engineering Co., Ltd. Inside the Machinery Research Laboratory (72) Inventor Atsushi Matsuno 4-28-2 Kichijoji Honmachi, Musashino City, Tokyo (72) Inventor Hiroshi Okabe 2-1-1, Hiromachi, Shinagawa-ku, Tokyo (72) Inventor Masanobu Kitano Gifu 1-69, Kano Nishimaru-cho, Gifu City, Japan (56) References JP-A-59-134202 (JP, A) JP-A-63-272801 (JP, A) (58) Fields studied (Int. Cl. ⁶ , DB Name) E01B 25/20 E01B 25/28

Claims (1)

(57) [Claims] Claims: 1. A track girder is disposed so as to extend in the longitudinal direction of a track girder,
And, a longitudinal member configured with an insulating material in the longitudinal direction of the track girder, a cross beam extending to the longitudinal member in the width direction of the track girder, and vertically extending and attached to the cross beam. A side pillar, a floor member provided on the longitudinal members and the horizontal beams and formed of a non-magnetic material, and a side wall member provided on the center side of the track girder of the side pillar and formed of a non-magnetic material. A track girder structure for a branching device, characterized in that: