JP3123658B2 - Trolley made of reinforced plastic - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley for railway vehicles and the like, and more particularly to a reinforced plastic trolley which is lightweight, durable and excellent in manufacturability.

[0002]

2. Description of the Related Art Conventionally, bogies for railway vehicles have been made using steel materials. In recent years, as typified by Shinkansen bullet trains, various places have been trying to reduce the weight of bogies in response to demands for higher speed and energy saving of vehicles. These lightening techniques include rationalization of design and application of lightweight materials.
In Japan, development of aluminum trolleys and reinforced plastic trolleys using reinforcing materials such as glass, aramid, and carbon are being promoted under the guidance of JR companies. The present invention is one of such developments.

A bogie is a primary structural member that supports a vehicle body via wheels, a drive system, and a spring. The structure of the bogie is composed of side beams that support the wheels and cross beams that support the vehicle body and the drive system via springs. When assembling these members, a joining method by welding is generally employed in a bogie structure using a metal such as steel or aluminum.

[0004]

In a truck using a reinforced plastic which can be expected to be lightest in weight, there is a problem in a method of joining a side beam and a cross beam. Originally, the structure of a reinforced plastic product had sufficient strength when the side beams and the cross beams were integrally formed, but there was a problem that automation was difficult from the viewpoint of manufacturing. An object of the present invention is to provide a reinforced plastic cart that solves such a problem.

[0005]

According to the present invention, as a result of intensive studies on a method for manufacturing such a structure easily and with high reliability, a structure different from the conventional structure was obtained, and the present invention was achieved. The gist of the present invention consists of a reinforced plastic material
Ends of two U-shaped members for girder webs abut each other
Reinforced plastic on the upper and lower surfaces sandwiching the abutting end.
Glue flange plate made of stick material for bonding
A side beam and a cross beam obtained by further joining are provided.
The cross beam is inserted into the provided cross beam insertion hole, and the side beam and
Whether the cross beam is reinforced plastic material around the insertion hole
Bonded by an adhesive through an L-shaped joint member
A reinforced plastic cart characterized by the fact that Use carbon fiber as the reinforcing fiber for reinforced plastics.
Is preferred.

The present invention has two features, one of which is the structure of the beam structure itself. That is, as shown in FIG. 1, the beam structural member 1 used in the present invention uses a flat plate 1-1 of a girder flange made of a reinforced plastic material and a U-shaped member 1-2 of a girder web, and has two U-shaped cross sections. A structure in which the ends of the members 1-2 and 1-2 are butted together, and two flat plate flanges 1-1 and 1-1 of the beam flange are bonded to the upper and lower surfaces with the butted surfaces interposed therebetween and assembled. It is in. With this structure,
When the required bonding strength is secured by increasing the bonding area,
In addition, by increasing the wall thickness at the joint,
Can also be secured at the same time. Here, the ends of the two U-shaped members 1-2 need not necessarily abut until they come into contact with each other. A desired interval may be provided between them. The other is to use the beam structural material 1 to make two side beams 2,2 and two cross beams 3,3.
And a grid-like assembly structure. That is, as shown in FIG. 1 and FIG. 3 and bonded together to integrate them. Thus, the insertion holes in the side beams 2, 2
By making the cross beams 3, 3 penetrate, the side beams 2, 2 make the cross beams
It is possible to support the end peripheral surface of
The end face of the cross beam can be
Compared to a cantilevered support structure welded to the side,
It is securely and firmly supported by the side beams.

In carrying out the present invention, the joint member 4 having an L-shaped cross section may be a frame-shaped integrally formed product as shown in FIG.
A combination of several divided L-shaped joint members may be used. In addition, it is convenient to use carbon fiber as the reinforcing fiber of the reinforced plastic because it is lightweight and tough.

[0008]

When the above-mentioned assembly structure is used, the components can be easily manufactured with simple structural members of a flat plate, a U-shaped member and an L-shaped member. In addition, since a reinforced plastic material is used, and all of them have an adhesive structure, it is lightweight and extremely excellent in durability.

[0009]

The present invention will be described below in detail with reference to examples. 3 to 5 show a truck structure according to the present invention and the direction of load applied to the truck. In the illustrated example, the trucks are side beams 2,2.
And the cross beams 3,3 are assembled in a girder shape. In the case where the design load shown by the arrow in FIG. 4 is applied to the bogie structure shown in FIGS. 2 and 3, an example of the calculation is shown below. Also,
The shear strength of the structural adhesive used in this design is 0.5 kg / m
It was m ^2. This strength is a strength in consideration of a humidified state, a 96 ° C. high temperature state, and a fatigue state at 2 × 10 ⁶ times. Incidentally, the initial strength was 2.1 Kg / mm ² .

Table 1 shows the numerical values of the respective design loads.

[0011]

[Table 1]

Here, F ₁ was estimated as follows. Vehicle weight Wb = 10,400 Kgw, motor weight Wm = 5
00 Kgw and drive system weight Wd = 260 Kgw. First, the upper and lower load F ₁ -1 per junction 1 places the motor weight Wm by the drive system weight Wd was estimated by the following equation. F ₁ −1 = (Wm × 8 + Wd × 10/3) / 2 = 2,435 Kg In addition, the vertical load F based on the vehicle weight Wb in consideration of the variation.
_1-2 was estimated as shown below.

F ₁ -2 = Wb / 2 = 5,200 Kg And the total F of the vertical loads applied to one joint point
₁ is the sum of F ₁ -1 and F ₁ -2.

[0014] Shear stress in the joining portion for the vertical load F ₁ is the primary load is calculated as follows. <Hypothetical calculation>: see FIG. 5 1) side beam 2, 2 and shear forces F ₁ is the junction of the cross beam 3, 3 is loaded. 2) Angle joints 4-1, 4-2, 4-3, 4-4 as joints
Consider joints 4-1 and 4-2 arranged in two places on the left and right of side beams 2 and 2 in total, and joints 4-3 and 4-4 arranged in the upper and lower areas where the peel is applied are Invalidated. 3) The effective width of the joint was 20 mm. <Result of Calculation> Shear stress = shear force / adhesive area = 7,640 / (1
(50 × 20 × 8) = 0.32 kg / mm ² , which is safe.

The left and right loads assumed when the vehicle is curved are calculated as follows.

The lateral load is such that a load F ₂ per single axis is received by one of the cross beams 3. <Hypothetical calculation>: loading the 6 reference 1) Table 1 of the load F _2. 2) It is assumed that only one of the right and left joints other than the hatched portion in FIG. 6 is effective. 3) The effective joint width is 20 mm. <Result of Calculation> Shear stress = 2,400 / (150 × 20 × 6) = 0.13 Kg / mm ²
Therefore, it is safe.

Next, the longitudinal load assumed when the brake is applied is calculated as follows. Load was under load F ₃ per uniaxial with one of the side beam 2 back and forth.

[0018] <hypothetical calculation>: bear the load F ₃ in FIG. 7 reference 1) Table 1. 2) Four joints on each side are valid, and those on the top and bottom are invalid. 3) The effective joint width is 20 mm. <Result of Calculation> Shear stress = 2,400 / (150 × 20 × 8) = 0.10 kg / mm ²
Therefore, it is safe.

The above results are summarized in Table 2.

[0020]

[Table 2]

From this result, it can be concluded that the joint structure has sufficient durability at each assumed load.

Based on this design calculation and the study of the tension, compression, shear and compression buckling, and shear buckling of each member, the configuration of each element member was determined, and a bogie was manufactured in the following manner. The material is Pyrofil (Mitsubishi Rayon®) M
Using an R50 / # 982 carbon fiber prepreg, a flat plate, a member having a U-shaped cross section, and a member having an L-shaped cross section were formed by an autoclave with the configuration shown in Table 3.

The curing conditions were as follows. 180 ° C x 1 hour x 7 atm

[0024]

[Table 3]

The bonding was performed in the following procedure. First, two cross beams were assembled by bonding a flat plate and a U-shaped member in cross section. The adhesive used was a film adhesive manufactured by ACC, trade name FM300. Next, a side beam penetration square hole was machined in the side beam, and an L-shaped cross-section member for bonding the side beam and the inner surface of the side beam was bonded to the side beam before assembling the side beam, and then the side beam was assembled. Finally, an L-shaped cross-section member for bonding the cross beam and the outer surface of the side beam was attached to obtain a desired truck structure. The reinforced plastic trolley obtained here is excellent in durability and has a steel trolley weight of 800.
It is lighter than Kgw and 250 Kgw, achieving a sufficient weight reduction.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a beam structural member as one of the constituent members of the present invention.

FIG. 2 is an assembled perspective view of side beams and cross beams made of the same beam structural material.

FIG. 3 is a plan view of a bogie as a typical embodiment of the present invention.

FIG. 4 is a front view of the same.

FIG. 5 is an explanatory perspective view showing a load direction of the bogie.

FIG. 6 is a conceptual diagram showing a vertical load and a connection structure.

FIG. 7 is a conceptual diagram showing a left-right load and a connection structure.

FIG. 8 is a conceptual diagram showing a longitudinal load and a connection structure.

[Explanation of symbols]

 1 Beam structural material 1-1 Plate for girder flange 1-2 U-shaped section member for girder web 2 Side beam 3 Cross beam 4 L-shaped joint member 4-1,4-2,4-3,4-4 Section L Shaped joint member

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification code FI B29L 31:30 (72) Inventor Yasunori Murano 4-160 Sunadabashi, Higashi-ku, Nagoya-shi, Aichi Mitsubishi Rayon Co., Ltd. Product Development Laboratory (56) References JP-A-53-11416 (JP, A) JP-A-60-47756 (JP, A) JP-A-61-143257 (JP, A) JP-A-62-244755 (JP, A) JP-A-3-31061 (JP, A) JP-A-4-292258 (JP, A) JP-A-62-264935 (JP, A) JP-A-56-146662 (JP, U) (58) Int.Cl. ⁷ , DB name) B61F 5/52

Claims (2)

(57) [Claims] 1. Two girders made of a reinforced plastic material
The ends of the U-shaped U-shaped members are arranged in abutting fashion.
Reinforced plastic on the upper and lower surfaces sandwiching the butt end
Girder flange flat plates made of wood are bonded by bonding
A side beam and a side beam obtained by
The cross beam is inserted into the beam insertion hole, and the side beam and the cross beam are in front.
A break made of reinforced plastic material around the insertion hole
It is joined by bonding via a surface L-shaped joint member
A trolley made of reinforced plastic. 2. The trolley made of reinforced plastic according to claim 1, wherein carbon fiber is used as the reinforcing fiber of the reinforced plastic.