JP2002067938A - Body frame of railway rolling stock by double structured side beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rigidity of a body frame of railway rolling stock by improving rigidity of a side beam with relatively simple structure change with out adding a particular reinforcing structure material. SOLUTION: This body frame of the railway rolling stock is constituted by fitting an end part of a channel shaped horizontal beam with the channel shaped side beam to be spot welded or plug welded. A channel shaped long size reinforcing member is fitted in the side beam to be spot welded or plug welded. The end of the horizontal beam is fitted in the inside of the reinforcing member to be spot welded or plug welded. The reinforcing member is a long size member and a whole length of the channel shaped side beam is reinforced with the reinforcing member. The reinforcing effect by the reinforcing member to the body frame extends to the whole of the body frame. Therefore, the balance of the rigidity of the body frame is not collapsed and any trouble is not caused to piping to the body frame and/or assembly of other equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a body frame of a railway vehicle, and uses a channel member having a U-shaped cross section to improve the strength of side beams of the body frame, thereby reinforcing the rigidity of the body frame. This is particularly effective when applied to so-called commuter trains, especially vehicles having a large number of entrances and exits.

[0002]

2. Description of the Related Art An ordinary commuter train generally has three to four entrances per vehicle. A stainless steel side beam 1 made of a channel material having a U-shaped cross section is connected to a stainless steel cross beam 3 made of a channel material arranged at a predetermined interval to form a body frame 13. The required rigidity of the vehicle is secured by being integrated with the fixed vehicle structure 12 including the side walls and the roof. The vehicle shown in FIG. 1 is a leading vehicle having a frontal structure 11 in a driver's cab. In recent years, to increase the passenger transport capacity per vehicle,
The length of the vehicle becomes longer (for example, about 25 m), and a side sliding door (entrance / exit) 1 is provided to make it easier for passengers to get on and off.
4 tends to be shortened, and as a result, the number of side sliding doors 14 per vehicle increases (one side 4).
Door or 5 doors). As described above, when the length of one vehicle is long, the interval between the side sliding doors 14 is short, and the number thereof is large, the rigidity of the vehicle structure 12 including the side walls and the roof is reduced, and as a result, the rigidity of the entire vehicle is reduced. Will decrease. To increase the rigidity of the vehicle, the size of the side beam 1 may be increased, but if the size of the side beam 1 is increased, the bogie,
As a practical matter, it is difficult to increase the height of the cross section of the side beam 1 due to the interaction with peripheral devices such as the floor structure and the arrangement of underfloor devices. On the other hand, it is one option to increase the plate thickness of the stainless steel channel material of the side beam 1, but the channel material is a roll-formed product, and there is a limit on the allowable plate thickness in the roll forming process ( 4.5
mm), the rigidity of the vehicle cannot be ensured by increasing the thickness of the side beam 1. In order to increase the rigidity of the vehicle body frame 13 without increasing the thickness of the side beams 1, various reinforcing structural members may be separately added to the vehicle body frame. Must be added to the body frame 13, and as a result, the weight of the body frame 13 increases,
It causes inconvenience in wiring and causes inconvenience such as connection with peripheral devices

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to increase the rigidity of a side beam by a relatively simple structural change without adding a special reinforcing structural member to a vehicle body frame, thereby increasing the rigidity of the vehicle body frame. The purpose is to devise the structure of the side beams.

[0004]

A means taken to solve the above problem is a railway vehicle constructed by spot welding or plug welding by fitting an end of a channel-like horizontal beam to a channel-like side beam. The following (a) and (b) are premised on the premise of the vehicle body frame. (A) A long channel-shaped reinforcing member is fitted into the side beam and spot-welded or plug-welded. (B) An end of the cross beam is fitted inside the reinforcing member and spot-welded. Or that the plug was welded.

[0005]

The channel-shaped reinforcing member fitted into the channel-shaped side beam is easily formed in the same manner as the side beam. Then, it is relatively easy and easy to assemble this into a side beam and perform spot welding. Therefore, the reinforcing structure of the side beams is extremely simple, and the reinforcing work is simple and easy. Further, the work of fitting the ends of the cross members into the channel-shaped reinforcing members and welding them is performed in the same manner as the conventional work of joining the cross beams to the side beams in the vehicle body frame. Therefore, the joining operation of the cross member to the side beam reinforced by the reinforcing member is not different from the conventional case. The reinforcing member is a long member, and the entire length of the channel material of the side beam is reinforced by the reinforcing member. Therefore, the reinforcing effect of the reinforcing member on the vehicle body frame is symmetrical with respect to the entire vehicle body frame, so that the rigidity balance of the vehicle body frame is not disrupted. Does not cause any inconvenience.

[0006]

[Embodiment 1] In Embodiment 1, the channel-shaped reinforcing member is welded and fixed to a channel material of a side beam while leaving a gap between its ends, and the ends are connected by a joint plate. That is.

With the clearance between the end portions of the channel-shaped reinforcing members, the channels are fitted into the channel material of the side beams and fixed by welding, so that the dimensional error in the length of the channel-shaped reinforcing members is reduced. It can be absorbed by the above gap. Therefore, it is not necessary to require high precision in the production of the individual channel-shaped reinforcing members and the assembling work to the side beams, and the reinforcing work of the side beams by the reinforcing members can be performed simply and quickly. Further, since the ends of the reinforcing member are connected by the joint plate, the reinforcing effect is secured also at the connecting portion of the reinforcing member. Therefore, the connecting portion does not become a local weak point.

[0007]

Embodiment 2 Embodiment 2 is that the channel-like reinforcing member is made of steel.

Since the reinforcing member is fitted into the side beam, there is no problem in terms of rust prevention and appearance, and steel has a thickness limitation in press forming compared to stainless steel. Since it is loose, its plate thickness can be increased.

[0008]

Next, an embodiment will be described with reference to the drawings.
In this embodiment, the height of the sectional shape is 270 mm, the width of the upper flange 1a is 150 mm, and the width of the lower flange 1b is 80 m.
This is an example in which the present invention is applied to a stainless steel side beam (channel material) 1 having a thickness of 4.5 mm and a thickness of 4.5 mm. The long reinforcing member 2 of this embodiment is formed by pressing a steel plate having a thickness of 6 mm into a channel shape by press forming.
Width and lower flange width are 144mm and 74mm respectively
A vertical web 2c having a height of 92 mm is provided at the tip of the lower flange 2b, and an L-shaped convex portion 2d projecting downward is provided at the tip of the upper flange 2a. By providing the longitudinal web 2c and the L-shaped convex portion 2d on the long reinforcing member 2 as described above, the rigidity of the reinforcing member 2 against vertical bending and horizontal bending is high, and therefore, the vertical and horizontal directions are high. The effect of reinforcing the side beams against bending is improved. Further, the end of the cross beam 3 is fitted into the reinforcing member 2 and spot-welded to the reinforcing member 2. At this time, the end of the cross beam 3 is inserted between the vertical web 2c and the L-shaped convex portion 2d, and its upper and lower surfaces are supported by these. A gap S of 20 mm is left between the ends 2e, 2e of the long reinforcing member fitted into the channel material of the side beam 1, and the joint plate 4 (200 mm in length) straddles the ends 2e, 2e. ) Is applied and welded to both ends 2e, 2e.
Are linked. By attaching the mounting bracket 5 to the vertical web 2 c of the reinforcing member 2 and welding the mounting bracket 5 to the reinforcing member 2, the mounting bracket for mounting various devices can be easily fixed to the side beam 2.

[0009]

As described above, a long reinforcing member having substantially the same shape is fitted into a channel-shaped side beam, and is fixed by spot welding, whereby the side beam can be reinforced over its entire length. Therefore, the body frame can be easily reinforced without breaking the balance between the strength and the rigidity of the body frame and without hindering the piping, wiring, and assembly of various devices. Therefore, the rigidity of a railway vehicle such as a commuter train having an extremely long overall length and having five or more entrances can be sufficiently enhanced by relatively simple reinforcing means.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle having many entrances and exits and a long overall length.

FIG. 2 is a plan view of a vehicle body frame.

FIG. 3 is a sectional view of a side beam according to the embodiment.

FIG. 4A is a cross-sectional view of an end connecting portion of a reinforcing member in the embodiment, and FIG. 4B is a front view of FIG.

5A is a cross-sectional view of a portion provided with a mounting bracket in the embodiment, and FIG. 5B is a front view of FIG.

[Explanation of symbols]

 1: Side beam 1a: Upper flange of side beam 1b: Lower flange of side beam 2: Long reinforcing member 2a: Upper flange of long reinforcing member 2b: Lower flange of long reinforcing member 2c: Length of long reinforcing member Web 2d: L-shaped convex portion of long reinforcing member 2e: End portion of long reinforcing member 3: Cross beam 4: Joint plate 11: Frontal structure 12: Vehicle structure 13: Body frame 14: Side sliding door (entrance)

Claims (3)

[Claims] 1. A body frame of a railway vehicle constructed by spot welding or plug welding by fitting an end of a channel-shaped cross beam to a channel-shaped side beam, wherein the channel-shaped long beam is inserted into the side beam. A vehicle body frame for a railway vehicle having a double-structured side beam in which a reinforcing member is fitted and spot-welded or plug-welded, and an end of a cross beam is fitted inside the reinforcing member and spot-welded or plug-welded. 2. The double beam according to claim 1, wherein said reinforcing member is welded and fixed to said side beam while leaving a gap between its ends, and said ends are connected by a joint plate. Body frame of railway vehicle. 3. The body frame of a railway vehicle according to claim 1, wherein said reinforcing member is made of steel.