U.S. patent application number 09/791813 was filed with the patent office on 2002-06-13 for car body of a railway car.
Invention is credited to Okada, Norihisa, Takeichi, Tetsuya, Yono, Masaki.
Application Number | 20020069787 09/791813 |
Document ID | / |
Family ID | 18849604 |
Filed Date | 2002-06-13 |
United States Patent
Application |
20020069787 |
Kind Code |
A1 |
Yono, Masaki ; et
al. |
June 13, 2002 |
Car body of a railway car
Abstract
The object of the present invention is to enable production of
high-accuracy car body with ease. An underframe 10 is constituted
by bonding together a plurality of hollow-shaped materials 50, 60
that are arranged along a longitudinal direction of a car body. The
hollow-shaped material 60 constituting the end portion of the
underframe 10 in the width direction is provided with a
hollow-shaped material 65 corresponding to a part of a side sill. A
hollow-shaped material 90 at the lower end of a side structure 20
is provided with a hollow-shaped material 95 corresponding to a
part of a side sill. An overlap between a projecting segment 101 of
the side sill 95 and the upper surface of the side sill 65 is
welded from above. An overlap between a projecting segment 103 of
the lower end and a projecting segment 73 is welded from below. The
size of the overlap is provided in prospect of the shrinkage of the
underframe 10 by welding the bolsters thereto.
Inventors: |
Yono, Masaki; (Kudamatsu,
JP) ; Takeichi, Tetsuya; (Kudamatsu, JP) ;
Okada, Norihisa; (Kudamatsu, JP) |
Correspondence
Address: |
ANTONELLI TERRY STOUT AND KRAUS
SUITE 1800
1300 NORTH SEVENTEENTH STREET
ARLINGTON
VA
22209
|
Family ID: |
18849604 |
Appl. No.: |
09/791813 |
Filed: |
February 26, 2001 |
Current U.S.
Class: |
105/413 ;
105/414 |
Current CPC
Class: |
B61D 17/043
20130101 |
Class at
Publication: |
105/413 ;
105/414 |
International
Class: |
B61D 017/00; B61D
025/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 11, 2000 |
JP |
2000-381641 |
Claims
We claim:
1. A car body of a railway car, wherein: an upper and lower
portions of a first side sill at an end portion in the width
direction of an underframe and an upper and lower portions of a
second side sill at an lower end portion of a side structure are
respectively overlapped in the horizontal direction; said overlap
between said upper portion of said first side sill and said upper
portion of said second side sill is bonded from above; and said
overlap between said lower portion of said first side sill and said
lower portion of said second side sill is bonded from below.
2. A car body of a railway car according to claim 1, wherein at
least one member constituting said overlap in said two overlaps is
a projecting segment projecting in the horizontal direction, and
said projecting segment is formed by elongating a plate
constituting a hollow-shaped material of said first side sill or
said second side sill.
3. A car body of a railway car according to claim 1, wherein: said
first side sill and said second side sill are respectively formed
from hollow-shaped materials; each member constituting said overlap
at said lower portion is a projecting segment projecting in the
horizontal direction; and said projecting segments are formed by
projecting a lower plate of said hollow-shaped material of said
first side sill and a lower plate of said hollow-shaped material of
said second side sill in the horizontal direction.
4. A car body of a railway car according to claim 1, wherein at
least one member constituting said overlap in said two overlaps is
a face plate of a hollow-shaped material which is positioned along
the horizontal direction.
5. A car body of a railway car according to claim 1, wherein: said
overlap of said upper portion is comprised of an upper face plate
of a hollow-shaped material of said first side sill, and a
projecting segment formed by elongating a plate connecting two face
plates of a hollow-shaped material of said second side sill in the
horizontal direction; and said projecting segment is positioned
above said faceplate.
6. A car body of a railway car according to claim 1, wherein a
projecting segment projecting downward from said second side sill
is positioned to the external side in the width direction of a car
body than a welding region of said lower overlap.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to bonding of a side structure
and an underframe in a car body of railway car.
DESCRIPTION OF THE RELATED ART
[0002] As is disclosed in Japanese Patent Laid-Open No. H5-139298,
a car body of a railway car is comprised of an underframe
constituting the floor, side structures constituting the side
surfaces, a roof structure constituting the roof, and end
structures constituting the end portions in the longitudinal
direction of the car body. The underframe is comprised of two side
sills arranged along the longitudinal direction of the car body,
and cross beams arranged between the two side sills in
perpendicular to the side sills. Also, the lower surface of the
underframe is provided with bolsters, which are welded in the width
direction of the car body, for mounting to a bogie. The bolsters
are also welded to the side sills. The bolsters are provided at two
locations along the longitudinal direction of the car body. The
underframe and the side structures are united by welding. The side
structures are placed on top of the underframe, and are welded from
the internal side and the external side. The externally welded
region is visible from the external side.
SUMMARY OF THE INVENTION
[0003] The thick bolsters are welded to the lower surface of the
underframe. Therefore, the width size of the underframe tends to
differ at different locations in the longitudinal direction.
Especially, the width size greatly shrinks at the region with the
bolster. For example, when the bolster is welded to the underframe,
the width size of the underframe shrinks for approximately 10 mm.
Therefore, the cross beam with its length elongated in prospect of
this shrinkage is welded to the side sill, and then the bolster is
welded thereto to obtain a predetermined size. Therefore, the
welding operation of the underframe is troublesome. Moreover, the
shrinkage differ from the temperature during welding operation and
the like, making it difficult to manufacture an underframe with
good accuracy.
[0004] Furthermore, when the width of the underframe differs, there
exist gaps in the welding region with the side structures.
Therefore, the welding in this region becomes difficult. As a
result, it is impossible to manufacture a car body with high
accuracy. Still further, this welding region is visible, especially
in the case where the car body is not coated, so that the
appearance is deteriorated.
[0005] The object of the present invention is to enable
manufacturing of a high-accuracy car body with ease.
[0006] The above-mentioned object could be achieved by a car body,
wherein:
[0007] an upper and lower portion of a first side sill at an end
portion in the width direction of an underframe and an upper and
lower portions of a second side sill at an lower end portion of a
side structure are respectively overlapped in the horizontal
direction;
[0008] the overlap between the upper portion of the first side sill
and the upper portion of the second side sill is bonded from above;
and
[0009] the overlap between the lower portion of the first side sill
and the lower portion of the second side sill is bonded from
below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is a longitudinal cross-sectional view of the feature
according to an embodiment of the present invention;
[0011] FIG. 2 is a view showing the assembling operation of the
underframe and the side structures according to the present
invention; and
[0012] FIG. 3 is a perspective view of the car body seen from
below.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0013] A preferred embodiment of the present invention will now be
explained referring to FIG. 1 through FIG. 3. A car body is
comprised of an underframe 10, a pair of side structures 20, a roof
structure 30, and end structures 40.
[0014] The underframe 10 is formed by welding a plurality of
hollow-shaped materials 50, 60 that are arranged along the
longitudinal direction of the car body. A bolster 15 is welded to
the lower surface of the underframe along the width direction
thereof. The bolster 15 is made of thick, plural plates. The
bolster 15 is also welded to the side sills at the end portions in
the width direction of the underframe. Each underframe 10 includes
two bolsters 15, which are provided on a bogie. The hollow-shaped
materials 50, 60 are bonded together by welding or friction stir
bonding.
[0015] The hollow-shaped material 60 constituting the end portion
of the underframe 10 is comprised of two face plates 61, 62, and
connecting plates 63 connecting the two in a truss shape. Also, to
the end portion side of the hollow-shaped material 60 (end portion
side of the underframe 10 in the width direction), there is
provided unitarily a rigid hollow-material 65 corresponding to a
so-called side sill. The side sill 65 is extruded together with the
hollow-shaped material 60. The region of the side sill 65 projects
downward from the lower face plate 62 of the hollow-shaped material
60. Also, in order to constitute a side sill 65, the hollow-shaped
material of the region is thicker than the other hollow-shaped
materials (larger in the longitudinal size), and is thicker in
plate thickness. Also, the same is larger in width size.
[0016] The bolster 15 is welded to the lower surfaces of the
hollow-shaped materials 50, 60. The end portion of the bolster 15
is welded to the side surface of the side sill 65 which projects
downwardly.
[0017] The hollow-shaped material 50 is substantially the same as
the hollow-shaped material 60 with the side sill 65 taken away.
[0018] The side structure 20 is comprised of a plurality of
hollow-shaped materials 80, 90 arranged along the longitudinal
direction of the car body. The hollow-shaped materials 80, 90 for
the general region have the same structure with the hollow-shaped
materials 50, 60, but differ in the size and the plate thickness.
The lower end of the hollow-shaped material 90 at the lower end of
the side structure is provided with a hollow-shaped material 95
corresponding to a so-called side sill. The side sill 95 is welded
to the side sill 65, and constitutes a so-called one side sill. The
plate thickness at the region of the side sill 95 is thickened.
[0019] A projecting segment 101 is projected towards the horizontal
direction from the side surface of the side sill 95 facing the
underframe 65. The projecting segment 101 overlaps the upper
surface of the upper face plate 71 of the side sill 65. This
overlap is fillet welded w1 from above. The upper surface of the
face plate 71 at the overlap is concaved. The projecting segment
101 is formed by projecting a horizontal connecting plate 105 of
the hollow-shaped material 90 in the horizontal direction.
[0020] The side sill 65 facing the side sill 95 includes a
projecting segment 73 projecting in the horizontal direction from a
lower face plate 72. The face plates 71, 72 are face plates in the
horizontal direction which constitute the hollow-shaped material of
the side sill 65. The projecting segment 73 overlaps the projecting
segment 103 which is formed by projecting a lower plate (a
connecting plate constituting the hollow-shaped material) 102 of
the side sill 95 in the horizontal direction. The overlap is fillet
welded w2 from below. The projecting segment 103 overlaps the
projecting segment 73 from above.
[0021] A face plate 91 constituting the side surface of the side
sill 95 is elongated downwardly to form a projecting segment 104.
The projecting segment 104 is positioned at the external side of
the car than the welding region, so that it makes the visual
contact of the welding region from side direction (for example,
from a platform) difficult. Therefore, there is no need to flatten
the welding region, and the operation could be simplified.
[0022] The size of the overlap between the face plate 71 and the
projecting segment 101, and the size of the overlap between the
projecting segment 73 and the projecting segment 103 are larger
than the shrinkage of the case where a plurality of hollow-shaped
materials 50, 60 are welded together, and the maximum shrinkage of
the case where the bolster 15 is welded thereto. Therefore, even if
the underframe 10 shrunk at respective places, a pair of side
structures 20, 20 could be welded at predetermined intervals with
ease.
[0023] Upon welding the side structures 20, 20 to the underframe
10, a jig 201 with predetermined size is arranged between a pair of
side structures 20, 20, and jigs 202, 202 from exterior interposes
the same therebetween, as is shown in FIG. 3. By doing so, the
position, the interval of the side structures 20, 20 are
determined, so that the same could be performed with false welding,
then with proper welding. The reference number 205 denotes a bed
for placing the car body.
[0024] The projecting segment 73 may overlap the plate constituting
the lower hollow-shaped material of the side sill 95. That is, the
projecting segment 101 may overlap the face plate 71. Also, the
projecting segment 103 may overlap the lower surface of the
projecting segment 73.
[0025] In the above-mentioned embodiment, the side sill is
indicated for each of the underframe 10 and the side structure 20.
However, it may be formed in one body as a substantial strength
member. In appearance, the large members positioned below the upper
surface of the underframe 10 are side sills.
[0026] According to the present invention, the width size of the
car body could be obtained regardless of the accuracy of the width
size of the underframe, the operation could be carried out with
ease, and the cost could be lowered. Also, the bonding of the
underframe and the side structures are performed from above and
below, so that it makes it difficult to see the bonding region at
the exterior of the car body from the side direction of the side
structures. This results in simplified bonding operation, and cut
in cost.
* * * * *