JP3768602B2 - Magnetic levitation railway ground coil equipment - Google Patents

Description

【００１２】
表１の結果から、連続ガラス繊維の含有率が、Ｌ−ＳＭＣ全体に対して３０ｗｔ％未満では成形品としての強度が従来より２０％弱ほど大きくなった（後述の表２参照）が、強度的に裕度を確保するのに不十分である。また、４０ｗｔ％を越えると、成形品の製造時に樹脂の流動性が悪く、内部に巣が発生して強度的に悪影響を及ぼす恐れがある。したがって、連続ガラス繊維の含有率は、Ｌ−ＳＭＣ全体に対して３０ｗｔ％〜４０ｗｔ％が適している。
【００１３】
次に、表２は連続ガラス繊維強化樹脂のＬ−ＳＭＣと従来のガラス繊維強化樹脂のＳＭＣとを比較した機械強度特性である。
【００１４】
【表２】

【００１５】
表２の結果から、連続ガラス繊維強化樹脂のＬ−ＳＭＣは、従来の短ガラス繊維強化樹脂のＳＭＣと比較した場合に、初期強度が約５０％以上、長期的強度（平面曲げ疲労強度）が約４０％向上している。
これは、連続ガラス繊維を渦巻状に配置したので、ガラス繊維が互いに絡み合うため、加熱・加圧時に樹脂が流動してもガラス繊維の移動が抑制され、ガラス繊維の密度が疎密になり難いためである。
したがって、車両が通過する際に車両との間が狭い場所で使用するスペーサ９を連続ガラス繊維強化樹脂で成形することにより、図４に示すＣ部及びＤ部を強化できるので、初期強度及び長期的強度を向上させることができる。
【００１６】
【発明の効果】
請求項１の発明によれば、推進コイルを押圧するスペーサを連続ガラス繊維強化樹脂で形成したので、初期強度及び長期的強度が向上して、電磁力及び熱応力などの外力に対して十分な裕度を確保できるため、推進コイルを長期間にわたって安定して保持することができる。
【００１７】
請求項２の発明によれば、請求項１に記載の磁気浮上式鉄道の地上コイル装置において、連続ガラス繊維強化樹脂を連続ガラス繊維の含有率が３０ｗｔ％から４０ｗｔ％で、無方向に分散させたので、成形品の製造時における樹脂の流動性がよく、強度的に安定したものを得ることができる。
【図面の簡単な説明】
【図１】 発明の実施の一形態を示す断面図である。
【図２】 図１のＩＩ−ＩＩ線からみた正面図である。
【図３】 図１のＩＩＩ−ＩＩＩ線からみた正面図である。
【図４】 図２のＩＶ−ＩＶ線の断面図である。
【図５】 図３のＶ−Ｖ線の断面図である。
【図６】 従来の磁気浮上式鉄道の地上コイル装置の断面図である。
【図７】 図６の要部を示す断面図である。
【図８】 図６の要部を示す断面図である。
【符号の説明】
７ コンクリート軌道、７ａ 側壁、７ｂ 底壁、８ 推進コイル、９ スペーサ、１４ 締結手段、１５ 浮上コイル、１５ｂ 外被。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ground coil device for a magnetic levitation railway provided with a propulsion coil and a levitation coil in a concrete track.
[0002]
[Prior art]
6, for example, JP-A-5-211 7 37 No., cross-sectional view of a conventional maglev ground coil device described in Japanese Patent Laid-Open No. 5-276607 Patent and Hei 5-304761, Fig. 7 and Fig. 8 is a cross-sectional view showing a main part of FIG.
[0003]
6 to 8, a side wall 1a and a bottom wall 1b constitute a concrete track 1 having a U-shaped cross section. A propulsion coil 2 that generates a propulsive force of a vehicle (not shown) is fixed to the side wall 1 a by a fastening means 4 via a spacer 3.
A levitation coil 5 that guides the levitation of a vehicle (not shown) is arranged on the center side of the concrete track 1 with respect to the propulsion coil 2 and is fixed to the side wall 1 a by fastening means 6.
The propulsion coil 2 is formed by covering a conductor 2a with an epoxy resin outer sheath 2b. The spacer 3 is made of a short glass fiber reinforced resin of a sheet molding compound (hereinafter referred to as SMC). Further, the levitation coil 5 is formed by covering the outer circumference of the conductor 5a with a jacket 5b formed of SMC.
In addition, SMC is formed by compounding, for example, a thermosetting polyester resin and a short glass fiber substrate, and is formed into a sheet shape having a thickness of about 2 mm, and the fluidity in the mold during heating and pressure molding. Therefore, the short glass fiber is generally selected to contain about 30 wt% of 3 to 6 mm (25 mm at the maximum).
In FIG. 6, when the vehicle passes in the vertical direction toward the paper surface shown in the figure, a force acts on the conductor 2 a shown in FIG. 7 in the Y direction that is instantaneously separated from the concrete track 1. Therefore, bending stress with tension is generated in the A portion and B portion of the spacer 3 of FIG. 7 used in a narrow space between the vehicle when the vehicle passes, and particularly, the bending stress in the B portion becomes large. Therefore, a mechanically reliable one is required.
[0004]
[Problems to be solved by the invention]
Since the ground coil device of the conventional magnetic levitation railway is constructed as described above, the density of SMC glass fibers tends to decrease due to the flow of resin during heating and pressure molding, so mechanical strength There is a problem that it is difficult to secure a sufficient margin for external force.
[0005]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a ground coil device for a magnetic levitation railway that can improve mechanical strength.
[0006]
[Means for Solving the Problems]
A ground coil device for a magnetically levitated railway according to a first aspect of the present invention is a propulsion coil that generates propulsive force of a vehicle on an inner side of a side wall of a U-shaped concrete track having both side walls and a bottom wall. In the ground coil device of the magnetic levitation railway, which presses the spacer and fixes the spacer to the side wall with fastening means, and the levitation coil that guides the vehicle's levitation to the center side of the concrete track from the propulsion coil is fixed to the side wall. The spacer is made of continuous glass fiber reinforced resin.
[0007]
The ground coil device for a magnetically levitated railway according to the invention of claim 2 is the ground coil device for a magnetically levitated railway according to claim 1, wherein the content of the continuous glass fiber of the continuous glass fiber reinforced resin is 30 wt% to 40 wt%. % And dispersed in a non-directional direction.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1 is a cross-sectional view showing an embodiment of the invention, FIG. 2 is a front view taken along line II-II in FIG. 1, FIG. 3 is a front view taken along line III-III in FIG. 4 is a sectional view taken along line IV-IV, and FIG. 5 is a sectional view taken along line VV in FIG.
[0009]
1 to 5, reference numeral 7 denotes a concrete track having a U-shaped cross section, which includes a side wall 7a and a bottom wall 7b. Reference numeral 8 denotes a propulsion coil fixed to the inner side of the side wall 7a of the concrete track 7 with a spacer 9 described later, and covers the conductor 8a with an outer cover 8b formed of epoxy resin. Reference numeral 9 denotes a spacer formed of L-SMC of a continuous glass fiber reinforced resin, which will be described later. The propulsion coil 8 is pressed and fixed to the side wall 7a of the concrete track 7 by a fastening means 14, which will be described later.
10 is an insert embedded in the side wall 7 a, 11 is a bolt screwed to the insert 10, 12 is a washer, 13 is a nut screwed to the bolt 11, and the spacer 9 is fixed to the side wall 7 a and propelled through the spacer 9. The coil 8 is fixed to the side wall 7a. In addition, the fastening means 14 is comprised by 11-13.
A levitation coil 15 is arranged on the center side of the concrete track 7 with respect to the propulsion coil 8, and covers the conductor 15a with a jacket 15b formed of SMC of a short glass fiber reinforced resin. Reference numeral 16 denotes an insert embedded in the side wall 7 a of the concrete track 7, and 17 denotes a bolt screwed into the insert 16. The floating coil 15 is pressed and fixed to the side wall 7 a via a washer 18. In addition, the fastening means 19 is comprised by 17 and 18.
For example, as described in JP-A-5-301221, the continuous glass fiber reinforced resin L-SMC is formed by arranging continuous glass fibers in a spiral shape on a thermosetting polyester resin so that the density is uniform. It contains about 40 wt% and is formed into a sheet having a thickness of about 1 to 2 mm. Therefore, since the continuous glass fibers are arranged in a spiral shape, the glass fibers are entangled to prevent movement during pressurization and heat molding.
[0010]
Table 1 shows the examination results of the mechanical strength (bending strength), the appearance of the cured product, and the moldability of the internal cutting investigation when the content of the continuous glass fiber is changed.
[0011]
[Table 1]

[0012]
From the results of Table 1, when the content of continuous glass fiber is less than 30 wt% with respect to the entire L-SMC, the strength as a molded product is about 20% less than before (see Table 2 described later). In general, it is insufficient to secure a margin. On the other hand, if it exceeds 40 wt%, the resin has poor fluidity during the production of a molded product, and there is a risk that a nest will be generated inside and the strength will be adversely affected. Therefore, the content of continuous glass fibers is suitably 30 wt% to 40 wt% with respect to the entire L-SMC.
[0013]
Next, Table 2 shows mechanical strength characteristics comparing L-SMC of continuous glass fiber reinforced resin and SMC of conventional glass fiber reinforced resin.
[0014]
[Table 2]

[0015]
From the results of Table 2, L-SMC of continuous glass fiber reinforced resin has an initial strength of about 50% or more and long-term strength (plane bending fatigue strength) when compared with SMC of conventional short glass fiber reinforced resin. About 40% improvement.
This is because the continuous glass fibers are arranged in a spiral shape, and the glass fibers are entangled with each other. Therefore, even if the resin flows during heating and pressurization, the movement of the glass fibers is suppressed, and the density of the glass fibers is not easily reduced. It is.
Accordingly, by forming the spacer 9 used in a narrow space between the vehicle and the vehicle with the continuous glass fiber reinforced resin when the vehicle passes, the C part and the D part shown in FIG. Strength can be improved.
[0016]
【The invention's effect】
According to the first aspect of the present invention, since the spacer for pressing the propulsion coil is formed of continuous glass fiber reinforced resin, the initial strength and the long-term strength are improved, and sufficient for external forces such as electromagnetic force and thermal stress. Since the margin can be ensured, the propulsion coil can be stably held over a long period of time.
[0017]
According to the invention of claim 2, in the ground coil device of the magnetic levitation railway according to claim 1, the continuous glass fiber reinforced resin is dispersed in a non-directional manner with a continuous glass fiber content of 30 wt% to 40 wt%. Therefore, it is possible to obtain a resin having good resin fluidity and stable in strength at the time of producing a molded product.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of the invention.
FIG. 2 is a front view taken along line II-II in FIG.
FIG. 3 is a front view taken along line III-III in FIG. 1;
4 is a cross-sectional view taken along line IV-IV in FIG.
5 is a cross-sectional view taken along line VV in FIG.
FIG. 6 is a cross-sectional view of a conventional ground coil device for a magnetically levitated railway.
7 is a cross-sectional view showing a main part of FIG. 6;
8 is a cross-sectional view showing a main part of FIG. 6;
[Explanation of symbols]
7 concrete track, 7a side wall, 7b bottom wall, 8 propulsion coil, 9 spacer, 14 fastening means, 15 levitation coil, 15b jacket.

Claims (2)

A spacer is pressed against a propulsion coil that generates a propulsive force of a vehicle on the inner side of the side wall of a U-shaped concrete track having both side walls and a bottom wall, and the spacer is fixed to the side wall by fastening means. In the ground coil device of a magnetic levitation railway in which a levitation coil for guiding the levitation of the vehicle is arranged on the side of the concrete track from the propulsion coil and fixed to the side wall, the spacer is formed of continuous glass fiber reinforced resin. A magnetic levitation railway ground coil device characterized by The ground coil device for a magnetically levitated railway according to claim 1, wherein the continuous glass fiber reinforced resin has a continuous glass fiber content of 30 wt% to 40 wt% and is dispersed in a non-directional direction. Ground coil device for magnetic levitation railway.

Images