JPH0194059A - Underframe structure for rolling stock - Google Patents

Abstract

PURPOSE:To aim at the promotion of lightweightiness in a underframe by installing an intermediate molding plate, formed in corrugation continued in a body cross direction, between both upper and lower plate set up between both side-beams. CONSTITUTION:A lower plate 2 is set up over space between both side-beams 1 installed at both sides in a body cross direction, and in the side beam 1, a flange receiving an end of the lower plate 2 is installed in a vertical intermediate part. In the upper part of this lower plate 2, an intermediate molding plate 3 with corrugation continued in the body cross direction is provided. In addition, an upper plate 4 is installed in the upper part of this intermediate molding plate 3, and it is attached so as to sandwich the intermediate molding plate 3 together with the lower plate 2. With this constitution, such a structure as similar to a truss construction is formed there by the lower plate 2, the intermediate molding plate 3 and the upper plate 4. Accordingly, it has ample strength as an underframe and, what is more, lightweightiness in this underframe is well promotable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an underframe structure for a railway vehicle, and particularly to an underframe structure for a railway vehicle suitable for passenger cars, trains, etc.

[Conventional technology]

BACKGROUND ART Conventionally, underframe structures for passenger cars or electric trains have been known to be constructed from hollow truss-shaped members made of aluminum alloy and constructed by extrusion. On the other hand, those made of steel.

A structure in which horizontal beams are installed in the form of a ladder between the side beams on both sides in the width direction of the vehicle body, or a structure in which thin plate structural members with a box-shaped cross section are continuously in contact with each other without installing horizontal beams in order to reduce weight and thickness. Structures installed to do so are also known. The underframe made of the thin plate structural member is, for example, disclosed in Japanese Patent Application Laid-open No. 6
No. 1-205551 is mentioned.

[Problem that the invention seeks to solve]

Among the above-mentioned conventional techniques, in the case of hollow truss shapes made from aluminum alloys, there are problems in that the material is more expensive than steel, and the manufacturing of the molds used for forming is costly. In addition, in the hollow truss type underframe constructed of wood, heat from equipment installed on the underside of the underframe is easily transmitted, and there is concern about the effects of the heat, and there is a risk of ignition from the equipment. Not enough consideration was given to strength.

Next, in the case of a steel underframe, thin plate structural members are arranged in the width direction of the vehicle body, so many other members are required to install equipment installed under the floor or to install piping and wiring, which reduces the number of parts. There was a tendency to increase.

In other words, sufficient consideration was not given to simplifying the configuration and improving workability.

The purpose of the present invention is to reduce the weight, and
It is an object of the present invention to provide an underframe structure that allows easy installation of other equipment and improves workability.

[Means for solving problems]

The above purpose is to provide side beams disposed on both sides of the underframe in the vehicle body width direction, a lower plate disposed between the both side beams and positioned lower, and an upper plate disposed between the both side beams and positioned higher than the lower plate. This is achieved by comprising a plate and an intermediate molded plate disposed between the upper plate and the lower plate and forming a continuous waveform in the width direction of the vehicle body.

[For production]

The upper plate and the lower plate are joined at the contact portion with the intermediate molded plate, resulting in a structure similar to a truss structure, and by installing the upper plate, lower plate, and intermediate molded plate between the beams on both sides, it is possible to In addition to being lighter than the frame, the corrugated portion of the intermediate molded plate extends in the longitudinal direction of the vehicle body.
The gap can be used for piping or wiring, and it is possible to prevent an increase in the number of parts associated with these installations.

〔Example〕

An embodiment of the underframe structure according to the present invention will be described below with reference to FIGS. 1 and 2. FIG. In the figure, reference numeral 1 indicates side beams arranged on both sides of the underframe in the width direction of the vehicle body. Reference numeral 2 denotes a lower plate disposed between the both side beams 1 provided on both sides in the width direction of the vehicle body, and the chain side beam 1 has a flange formed in the middle part in the vertical direction to receive the mirror part of the lower plate 2. Lower plate 2 on the flange
are connected and supported. Reference numeral 3 denotes an intermediate molded plate which is provided above the lower plate 2 and has a continuous corrugated shape in the width direction of the vehicle body, and has sloped portions and flat plate portions formed alternately. Reference numeral 4 denotes an upper plate provided above the intermediate forming plate 3, and the lower plate 2
and are attached so as to sandwich the intermediate forming plate 3. Reference numeral 5 denotes a mounting rail that is provided corresponding to the joint portion of the lower plate 2 with the intermediate molded plate 3, and supports equipment that is attached to the underfloor portion. Incidentally, a reservoir groove 8 is formed in the flat plate portion 7, which is the joint portion of the intermediate molded plate 3 with the upper plate 4, for storing the adhesive 12 used for joining the upper plate 4. This portion is filled with adhesive 12 and bonded to the upper plate 4. On the other hand, the intermediate molded plate 3 and the lower plate 2 are joined by forming spot welds 13 between the lower flat plate portion of the intermediate molded plate 3 and the lower plate 2. Note that a mounting rail 5 is partially provided corresponding to the joint portion, and in this case, spot welding is performed integrally including the mounting rail 5. Reference numeral 6 denotes a groove portion formed at an intermediate position in the width direction of the vehicle body other than the joint portion of the intermediate molded plate 3 in the upper plate 4, and a groove portion 6 is used to store the coating flooring material 11 applied to the upper surface of the upper plate 14 to form the floor surface 14. , are provided to improve the strength of the upper plate 14, which is on the compression side with respect to vertical loads. The depth and length of the groove 6 are determined depending on the strength of the upper plate 14 and the application status of the floor covering 11. Reference numeral 9 denotes a sound-absorbing hole formed in a flat part of the lower plate 2 other than the joint part of the intermediate molded plate 3, and 10 denotes a sound-absorbing hole similar to the above-mentioned hole formed in the intermediate molded plate 3. be. Note that the holes 9 and 10 are provided to correspond to equipment installed under the floor that generates noise, and are provided in the lower plate 2. If the gap formed by the intermediate molded plate 3 and the upper plate 4 is filled with a sound absorbing material, an even greater sound absorbing effect can be expected. By the way, although the above-mentioned intermediate molded plate 3 is formed with inclined portions and flat portions alternately, the inclined portions may be formed perpendicularly, that is, at right angles to the flat portions, and the angle may be determined as appropriate. 'Can be selected as desired.

In such a configuration, a manufacturing method thereof will be explained. First, the outer peripheral portion of the underframe including the side beams 1 is configured in advance. On the other hand, the lower plate 2 has a width equivalent to one width of the sills on both sides, and the intermediate molded plate 3 and the mounting rail 5 having a corrugated shape consisting of the sloped portion and the flat plate portion are attached thereto by spot welding. . Note that a reservoir groove 8 is formed in the upper flat plate part 7 of the intermediate molded plate 3, and holes 9 and 1° are formed in advance in the parts corresponding to the noise generating equipment, including the lower plate 2. . Next, the upper plate 4 is adhesively attached to the flat plate portion 7 of the open center cedar plate 3 using an adhesive 12.

Note that as the adhesive 12, a rubber adhesive having elasticity is used. Further, a groove portion 6 is previously formed in the front upper plate 4, and the bonding operation is performed so that the flat plate portion 7 of the intermediate molded plate 3 corresponds to this intermediate position. After the lower plate 2, intermediate molded plate 3, upper plate 4, and mounting rail 5 are combined and joined in this way, they are attached between the beams 1 on both sides by welding. By the way, when filling the gap between the lower plate 2, the intermediate molded plate 3, and the upper plate 4 with a sound absorbing material, the work is performed after the combination and joining. In this way, almost the entire underframe is completed. Join the side structure and gable structure to this underframe,
Furthermore, the structure is completed by attaching the roof structure.

After the structure is completed, a highly elastic flooring material 11 made of urethane resin is applied to the upper surface of the upper plate 4 to form a floor surface 14.

In such a configuration, the load applied to the floor surface 14 is
, supported by a composite laminated structure formed by an intermediate forming plate 3 and a top plate 4. At this time, a tensile load acts on the lower plate 2, and a compressive load acts on the upper plate 4. The upper plate 4
By forming the groove 6 in the 0, the rigidity is improved and deformation such as buckling is prevented.
Next, in response to the car end load acting on the car end of the underframe, the wave shape of the intermediate molded plate 3 extends in the longitudinal direction of the car body, and
Since it is joined to the upper plate 4 and the lower plate 2, it is lightweight and has sufficient strength, and can sufficiently support the vehicle end load.

According to such a configuration, a structure similar to a truss structure can be formed by the lower plate 2, intermediate molded plate 3, and upper plate 4, so that it has sufficient strength as an underframe and is lightweight. Moreover, the strength of the upper plate 4 itself can be improved by the groove part 6 formed in the intermediate part of the upper plate 4 other than the part where the intermediate molded plate 3 is joined, and the vertical load acts on the underframe. Deformation such as buckling can be prevented even if a compressive load is applied to the therefore,
The strength of the underframe can be improved.

On the other hand, the upper plate 4 is joined to the intermediate molded plate 3 using an adhesive 12.
Since the parts are bonded together, heat transfer between the members can be suppressed, and if the adhesive 12 is made of an elastic material, vibration propagation can also be prevented. Therefore, it is possible to prevent heat from being transferred from the underfloor equipment into the cabin, and also to prevent the propagation of vibrations.

Furthermore, by using a material with high elasticity as the painted flooring material 11, the floor surface 14 of the guest room can be made to have a smooth texture.

By the way, the material of the lower plate 2, intermediate molded plate 3, and upper plate 4 is, for example, high-tensile steel (Zo.

kg/mm2 class), etc., and by using such a material, sufficient strength and weight reduction can be achieved. Furthermore, fire resistance can be improved, and the floor can be prevented from being destroyed by fire from under-floor equipment.

Further, by providing the holes 9 and 10 in the lower plate 2 and the intermediate molded plate 3 in correspondence with the sound sources, it is possible to reduce noise from underfloor equipment and the like. Furthermore, by filling the gaps between the lower plate 2, the intermediate portion (the cedar plate 3 and the upper plate 4) in correspondence with the holes 9.10, the noise reduction can be further effectively achieved. Since it is formed continuously in the longitudinal direction of the vehicle body, it can be used for piping and wiring, and the number of parts conventionally used for piping or wiring can be reduced.

Furthermore, since the mounting rail 5 is joined at the same time as the lower plate 2 and the intermediate molded plate 3, no special installation work is required.

In addition, in the above embodiment, the intermediate forming plate 3 and the upper plate 4
Although an example has been described in which the bonding is performed by adhesion, the present invention is not limited to this, and the above object can be achieved even if this portion is bonded by welding or other bonding means. .

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to reduce the weight of the underframe and to easily install other equipment.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the underframe structure according to the present invention, and FIG. 2 is a vertical sectional view of FIG. 1.

Claims (1)

[Claims] 1. Side beams arranged on both sides of the underframe in the width direction of the vehicle body, a lower plate arranged between the both side beams and located at a lower level, and an upper plate arranged between the both side beams and located above the lower plate. An underframe structure for a railway vehicle, comprising: an intermediate molded plate disposed between the upper plate and the lower plate and having a continuous waveform in the width direction of the vehicle body.