Hitachi, Ltd.

Sumitomo Light Metal Industries, Ltd.

Kasado Kikai Co., Ltd.

Sumio Okuno

Morishige Hattori

Toshiaki Makino

Michifumi Takeichi

Keiji Ohmura

Masato Okazaki

Kentaro Masai

Hitoshi Tsuruda

Hiroyuki Yamada

Takeshi Kawasaki

Takeyuki Watanabe

Kazufumi Yamaji

Seiichi Okamoto

Naoyuki Tamura

Muneo Mizumoto

Yoshihiko Ina

Sumio Yamaguchi

Ryoichi Takayama

Mamoru Ohara

Hiroshi Irie

Takahisa Yamamoto

Kiyotaka Kikumoto

Koichiro Okuto

Kazuo Sato

Hideyuki Nakamura

Takao Kuroda

Shinjiro Ueda

Hideaki Kamohara

Shigeo Kato

Katsuyuki Terada

Kazumasa Fujioka

Toshiaki Sagawa

Yasuhide Matsumura

Masakazu Matsumoto

Shinichiroo Ishikawa

Hideshi Ooba

Hisashi Tani

Kentarou Masai

Senzoo Hida

Masayuki Dogen

Haruo Hirikawa

Michifumi Takeich

Msato Okazaki

Kenji Kimura

Masatake Nakamura

A front end portionis disposed on the front end of a car body. The floor thereof consists of extruded hollow membersthat constitute a shock absorber. The shock absorberis divided into an upper shock absorberand a lower shock absorber. Annealed extruded hollow members are used to form the hollow member. The hollow membersare disposed so that their direction of extrusion corresponds to the longitudinal direction of the car body. The hollow membersare divided longitudinally into two portions by a plate. At the width-direction ends of member, the face platesandare welded onto plates. Upon receiving impact load, membersfold up into concertinas, absorbing the impact force. Since membersare separated by a plate, they deform evenly and continuously into concertinas instead of being bent in half, capable of absorbing a large energy.

Railway car

In a railway car body formed of hollow shape members, a hollow shape memberhaving a shock absorbing function is provided to the ends of a hollow shape memberconstituting an underframe, where impact load is most likely to be received. The hollow shape memberis positioned so that the longitudinal direction thereof is arranged along the longitudinal direction of the car body. When impact load is received, the hollow shape memberformed at the ends of the memberdeforms and collapses, thereby relieving the impact force. The present invention simply provides treatment to some areas of the hollow shape members that form the car body without changing the conventional railway car structure greatly, thus minimizing the impact load provided to the passengers upon collision, and improves the safety of the railway car.

Upon forming a railway car composed of plural hollow shape members , annealed hollow shape members are used to form the ends of an underframe . The hollow shape members are disposed so that their longitudinal orientation equals the longitudinal direction of the car body. The underframe is formed by disposing plural hollow shape members adjacent one another in the width direction and welding them together by friction stir welding. When the hollow shape members receive impact load, the ends of the members deform into concertinas, thereby absorbing the impact force. At this time, the friction stir welded portions also receive the impact force, but cracks are not created at the friction-stir-weld joints, and the weld joints do not prevent the hollow shape members from deforming into concertinas.

A front end portion is disposed on the front end of a car body. The floor thereof consists of extruded hollow members that constitute a shock absorber . The shock absorber is divided into an upper shock absorber and a lower shock absorber . Annealed extruded hollow members are used to form the hollow member . The hollow members are disposed so that their direction of extrusion corresponds to the longitudinal direction of the car body. The hollow members are divided longitudinally into two portions by a plate . At the width-direction ends of member , the face plates and are welded onto plates . Upon receiving impact load, members fold up into concertinas, absorbing the impact force. Since members are separated by a plate, they deform evenly and continuously into concertinas instead of being bent in half, capable of absorbing a large energy.

The present invention aims to provide a joint figuration inhibiting decrease in strength resulting from welding at the joint region, in a case where hollow-shaped material is friction stir welded. A face plate ( ) between a rib ( ) at the end portion of a hollow-shaped material ( ) and a rib ( ) has a thickness t (t ) at the rib ( ) side and ti at the rib ( ) side. The thickness t (t ) is thicker than ti. The thickness between the two is changed smoothly. The thickness of the plate thickness t (t ) is provided by projecting towards the other face plate side.

Hollow-shaped material

A car body, in which a hollow shape stock composed of two face plates and ribs joining the face plates together is used to form a side body, and stresses are reduced while minimizing an increase in mass. A car body, comprising a hollow shape stock composed of two face plates ( ) and ribs ( ) joining the face plates together and used to form a side body ( ), wherein face plate portions ( ) in regions (B, D) above and below connection points (c) between circular arcs, which constitute corner portions of a window ( ), and vertical sides of the window ( ) are greater in thickness than in the remaining regions (A, C, E). Stresses are most heavily concentrated in the regions (B, D). Therefore, it is possible to achieve reduction in mass and enhancement in strength together. Further, buckling preventive tools can be arranged in spaces in the regions (B, D) of the hollow shape stock. Further, with the hollow shape stock ( ) in a pier panel, face plates on an internal side are greater in thickness than those on an external side.

Car body

A honeycomb panel having a honeycomb core interposed between two face plates, and inserts which are exposed to an opening formed through the panel. A desired member is bonded to the panel through the inserts and the face plates which are bonded together. The inserts are disposed in selected honeycomb cells of the honeycomb core when the honeycomb core is assembled with the face plates, or the inserts are inserted into the selected honeycomb cells which are open to the opening or a preliminary hole formed before the opening is cut. Alternatively, the inserts are positioned relative to the face plates before the honeycomb core members are disposed relative to the inserts. The honeycomb panel may be produced by various methods disclosed.

Honeycomb panel having inserts for fixing a member in an opening in the

A rolling stock ventilator including an air supply fan, an exhaust fan an inverter for changing air feed characteristics of the air supply fan and the exhaust fan. Flow path resistance changers, a tunnel detector to detect the presence of a tunnel, and a car internal pressure detector are also provided. A controller provides signals to the inverters and the flow path resistance changers with the signals representing a control command to change the operation frequency of the air supply fan and the exhaust fan in accordance with the result of a detection by the tunnel detector and the car internal pressure detector and also provides a control command to change the air feed resistance of the flow path resistance changers.

Rolling stock ventilator and its control method

Method of producing a honeycomb panel insert for fixing a member in an

A car body of railway rolling stock suitable for use for passenger cars or electric passenger cars and easy to fabricate at a low material cost. An underframe constituting the car body comprises a center underframe produced at light-alloy extruded shapes and an end underframe produced of a ferrous material, and a roof framing, a side framing and an end framing which constitute the car body are composed of outer plate members produced of a ferrous material and frame members produced of a ferrous material.

Car body of railway rolling stock and method for fabricating car body

A vehicle body, such as, for example, a railway passenger vehicle body, which includes an external body sheeting formed of opposite sides and a roof and having an internal floor extending between the sides. The sides, above the level of the internal floor, and the roof each include a number of extruded metal plates forming the external body sheeting and integral ribs, extending in a longitudinal direction of the vehicle body, are provided on inner faces of the extruded metal plates. The extruded metal plates are welded together at weld lines extending in a longitudinal direction of the vehicle body.

Vehicle body construction having longitudinally elongated extruded

A method is provided for making a passenger car body structure which has a panel assembly forming at least part of a side, the roof, and end of the floorplate. Each panel has inner and outer spaced metal sheets and a cellular metal core brazed to the sheets and maintaining them spaced apart. To join the panels, a metal connecting member is joined to at least one of the inner and outer sheets and has a projection for use in welding the panel to the neighboring panel. The projection extends in the lateral direction of the panel and is preferably of material thicker than the general sheet thickness of the sheets. A frame member of the body structure may be welded to the panels at the joint.

Railway car body structures and methods of making them

This invention relates to a method of fixing an inside panel of a car, and its fixing structure. In a structure for fixing an inside panel by employing an interior decoration material to form a passenger room of a car, the present invention relates to a method and a structure for fixing an inside panel of a car, particularly suitable for a railway car. An inside frame which is press-formed is fixed to frames of a car, and an inside panel is fixed to the inside frame through fasteners. Since the inside panel is fixed to the press-formed inside frame, surface uneveness does not occur on the inside panel even if any unevenness exists on the frames of the car. A cushion material is attached to the inside frame at the joint portion of two inside panels along the joint portion. The inside panel has a decoration sheet bonded to its surface, and this decoration sheet is bent back at the edge portions of the inside panel. Therefore, the appearance of the joint portion can be improved.

Method of fixing inside panel of car and structure for fixing the same

A railway car body structure has a panel assembly forming at least part of a side, the roof, an end or the floorplate. Each panel has inner and outer spaced metal sheets and a cellular metal core bonded to the sheets and maintaining them spaced apart. To join the panels, a metal connecting member is joined to at least one of the inner and outer sheets by continuous metal-to-metal bonding and has a projection for use in welding the panel to the neighboring panel. The projection extends in the lateral direction of the panel and is of material thicker than the general sheet thickness of the sheets. A frame member of the body structure may be welded to the panels at the joint.

Railway car body structures

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Kudamatsu, Japan

Sumio Okuno