JP2925401B2 - Pantograph boat body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pantograph boat body for a high-speed electric vehicle, which has high durability and good trackability.

[0002]

2. Description of the Related Art A pantograph is a current collecting device for a train or the like, and is moved up and down by a spring or compressed air.
It consists of a rubbing plate that contacts the overhead wire and a boat that supports it.
The hull must be made of a material having heat resistance and arc resistance, light weight, high rigidity, and high bending fatigue resistance. Conventionally, a hollow aluminum structural material or the like has been used.

However, in the case of conventional materials, due to repeated bending fatigue, it is necessary to perform inspection and replacement every certain period of use, and a material having higher durability is required. further,
With the recent sophistication of transportation systems, the speed of electric vehicles, as represented by the Shinkansen, has been pursued to the utmost, and there is a demand for improved pantograph durability and overhead line followability.

[0004]

DISCLOSURE OF THE INVENTION The present inventors have intensively studied the application of a carbon fiber composite material as a material satisfying the above requirements, and found that a composite material having a specific structure has excellent pantograph performance. The present invention has been reached.

[0005]

The present invention has a tensile strength of 300k.
g / mm ² or more, a tensile modulus 22ton / mm ² or more carbon fibers and secondary transition point (Tg) composite material consisting of 0.99 ° C. or more resin matrix as a main structure, glass surface of the main composite material
Comprising placing a fiber / resin composite material is integrally molded, the carbon fiber content of the composite material is not less than 40 vol%, and a longitudinal flexural modulus 8 ton / mm ² or more, the width direction of the flexural modulus It is a boat body material for a pantograph characterized by being ² ton / mm ² or more.

[0006]

The carbon fiber used in the present invention is obtained by firing a polyacrylonitrile-based fiber or pitch-based fiber, and has a tensile strength of 300 kg / mm ² or more and a tensile modulus of 22 ton / mm ² or more, preferably 28 ton / mm ² or more. the use of ^two or more of those. These are appropriately arranged in an orientation of 0 to 90 ° to obtain a material having desired characteristics.

The matrix resin has a secondary transition point.
A thermosetting resin such as epoxy, vinyl ester, polyester, phenol, bismaleimide, and polyimide, and a thermoplastic resin such as polyphenylene sulfide, polyether sulfone, polyether ketone, polyamide, and polyester at 150 ° C. or higher are used.

Preferably, the matrix resin has a secondary transition point selected from the group consisting of an epoxy resin, a polyimide resin, a bismaleimide resin and a phenol resin.
A thermosetting resin of 200 ° C. or higher is used. Most preferred is a bismaleimide-based resin containing diallyl bisphenol described in Japanese Patent Application No. 63-265274.

[0010] The boat body of the present invention is manufactured by a usual manufacturing method of fiber reinforced plastic. For example, a carbon fiber having the above-mentioned predetermined properties is aligned, and a prepreg impregnated with the matrix resin, or a woven prepreg in which carbon fibers are woven vertically and horizontally, are laminated in a designed orientation in a fiber direction, and autoclave molding is performed. Alternatively, it can be obtained by molding by heat curing or shaping according to a conventional method of press molding. At this time, the carbon fiber content is set to 40 vol% or more.

The boat body thus obtained has a high rigidity.
From, the longitudinal bending modulus of elasticity 8ton / mm ^TwoAbove, bending in the width direction
Elastic modulus 2ton / mm^TwoThat is all.

Further, in order to obtain arc resistance and corrosion resistance of a joint portion with another member, a glass fiber composite material layer made of the same matrix resin is provided on the surface layer of the composite material produced as described above. Provide. The thickness of the glass fiber composite material layer is preferably about 0.1 to 1 mm. This glass fiber composite material layer is integrally formed with the carbon fiber composite material .

[0013] The pantograph manufactured using the boat body of the present invention has higher durability of repeated bending strength and a lighter weight than those manufactured by conventional materials because of the characteristics of the boat body. And improved overhead line followability, making it extremely suitable for high-speed electric vehicle applications.

[0014]

The present invention will be specifically described below with reference to examples. Example 1 Polyacrylonitrile-based high-strength carbon fiber (tensile strength: 350 k
g / mm ² , tensile modulus 24 ton / mm ² )
Diallyl bisphenol A so that it becomes 55 vol% or more.
Was impregnated by fusion to obtain a carbon fiber unidirectionally aligned sheet prepreg (A1) having a thickness of 0.25 mm.

A fiber content of 60 vol% or more, comprising a glass cloth and the bismaleimide-based resin film,
A glass cloth prepreg (B1) having a thickness of 0.20 mm was produced.

The prepreg A1 is moved in the 0 ° direction (longitudinal direction).
And 12 ply mirror-symmetrical lamination in the 90 ° direction (width direction) at a ratio of 3: 1. Further, prepreg B1 is vertically arranged on the surface layer, and molded by a usual method of autoclave molding. Thus, a plate having a thickness of about 3.2 mm was obtained. In addition, Tg was measured by the TMA method using DSC.

The plate was slit along the 0 ° direction, and the flexural modulus was measured.
m ² and 3 ton / mm ² in the width direction. When this material was used as a pantograph boat body material for a high-speed electric vehicle, the trackability of the overhead wire was improved, and the durability was at least three times that of aluminum.

Example 2 Polyacrylonitrile-based medium elastic carbon fiber (tensile strength 450 k
g / mm ² , tensile modulus 30 ton / mm ² )
An epoxy-based resin film was melt-impregnated and impregnated so as to have a volume of 60 vol% or more to produce a carbon fiber unidirectionally aligned sheet prepreg (A2) having a thickness of 0.15 mm.

Further, a fiber content of 60 vol% or more and a thickness of 0.15
mm of glass cloth prepreg (B2) was produced.

The prepreg A2 is moved in the direction of 0 ° ± 45 °.
16-ply mirror-symmetric lamination is performed in the 90 ° direction at a ratio of 2: 1: 1, and prepreg B2 is placed vertically on the surface layer, and molded by a conventional method of press molding.
A 2.8 mm thick plate at 0 ° C. was obtained.

This plate was slit along the 0 ° direction, and the flexural modulus was measured.
m ² and 3.5 ton / mm ² in the width direction. This material showed good performance for overhead line following and durability as a pantograph boat material for high-speed electric vehicles.

Examples 3 and 4 and Comparative Example The carbon fiber prepreg A1 and the glass fiber prepreg B1 produced in Example 1 were combined to produce several kinds of pantograph boats, and a practical test was conducted. Table 1 shows the results.

[0023]

[Table 1]

According to this table, the flexural modulus is 8 ton / long in the longitudinal direction.
mm ² or more, when the width direction 3.0 ton / mm ² or more, overhead line conformability and durability balance pantograph good, if out of this range, it is found that the durability and the overhead line tracking of the performance is degraded. Further, by providing the glass cloth composite layer on the surface, the arc resistance is improved.

[0025]

According to the boat body material of the present invention, a pantograph of light weight, high rigidity and high durability suitable for a high-speed electric vehicle can be obtained.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kotaro Asai 2-1-1, Ushikawa-dori, Toyohashi-shi, Aichi Prefecture Inside the Mitsubishi Rayon Co., Ltd. Toyohashi Office (72) Inventor Masahiro Sugimori 4-1-1 Sunadabashi, Higashi-ku, Nagoya-shi, Aichi Prefecture No. 60 Mitsubishi Rayon Co., Ltd. Product Development Research Institute (72) Inventor Shigetsuji Hayashi 4-6-1 Sunadabashi, Higashi-ku, Nagoya City, Aichi Prefecture Mitsubishi Rayon Co., Ltd. Product Development Research Laboratory (56) References JP-A-62-217806 ( JP, A) JP-A-2-113006 (JP, A)

Claims (2)

(57) [Claims] 1. A tensile strength of at least 300 kg / mm ² and a tensile modulus of 22
ton / mm ² or more carbon fibers and secondary transition point (Tg) composite material consisting of 0.99 ° C. or more resin matrix as a main structure, a main
A glass fiber / resin composite material is placed on the surface of the structural composite material.
The composite material , which is placed and integrally molded, has a carbon fiber content of 40 vol% or more and a longitudinal bending elastic modulus of 8%.
ton / mm ² or more, pantograph for collector head member, characterized in that the width direction of the flexural modulus is 2 ton / mm ² or more. 2. The pantograph according to claim 1, wherein the resin matrix is a thermosetting resin having a secondary transition point of 200 ° C. or higher selected from the group consisting of an epoxy resin, a polyimide resin, a bismaleimide resin and a phenol resin. Hull material.