Abstract: This invention relates to a system for mounting an underfloor electronic equipment to a rolling stock body having an underfloor storage portion formed under the floor in the longitudinal direction of the body as a portion of the body. The underfloor storage portion comprises a guidance tool for guiding and supporting the underfloor electronic equipment formed as a unit, a body-side connector corresponding to an electronic equipment-side connector formed to the electronic equipment, and a fixing tool for fixing the electronic equipment to the underfloor storage portion. The underfloor electronic equipment comprises a moving means guided by the guidance tool and the electronic equipment-side connector corresponding to the body-side connector.

Abstract: A front end portion 100 is disposed on the front end of a car body. The floor thereof consists of extruded hollow members 210 that constitute a shock absorber 200. The shock absorber 200 is divided into an upper shock absorber 200 and a lower shock absorber 200. Annealed extruded hollow members are used to form the hollow member 210. The hollow members 210 are disposed so that their direction of extrusion corresponds to the longitudinal direction of the car body. The hollow members 210 are divided longitudinally into two portions by a plate 220. At the width-direction ends of member 210, the face plates 211 and 212 are welded onto plates 223-226. Upon receiving impact load, members 210 fold up into concertinas, absorbing the impact force. Since members 210 are separated by a plate, they deform evenly and continuously into concertinas instead of being bent in half, capable of absorbing a large energy.

Abstract: Abutted portions of face plates 12b and 22b of frame members 10 and 20 are friction stir welded. With the abutting, a projecting portion 20c of an end portion of the face plate 20b of the frame member 20 is inserted into a recessed portion 12c of an end portion of the face plate 12b of the frame member 10. By this engagement, the outer face on one face side of the face plates 12b and 20b form a smooth surface, so that there is no step at the joined edges. Next, a rotary tool 250 is inserted into the gap between the abutted plates, from the side of the raised portions 16 and 26 of the face plates 12b and 20b, while the other faces 12bc and 20bc of the face plates 12b and 20b are supported flatly on a bed during the friction stir welding. Accordingly, the welding of the engaged plates can be carried out without any step-wise difference.

Abstract: A front end portion 100 is disposed on the front end of a car body. The floor thereof consists of extruded hollow members 210 that constitute a shock absorber 200. The shock absorber 200 is divided into an upper shock absorber 200 and a lower shock absorber 200. Annealed extruded hollow members are used to form the hollow member 210. The hollow members 210 are disposed so that their direction of extrusion corresponds to the longitudinal direction of the car body. The hollow members 210 are divided longitudinally into two portions by a plate 220. At the width-direction ends of member 210, the face plates 211 and 212 are welded onto plates 223-226. Upon receiving impact load, members 210 fold up into concertinas, absorbing the impact force. Since members 210 are separated by a plate, they deform evenly and continuously into concertinas instead of being bent in half, capable of absorbing a large energy.

Abstract: This invention relates to a system for mounting an underfloor electronic equipment to a rolling stock body having an underfloor storage portion formed under the floor in the longitudinal direction of the body as a portion of the body. The underfloor storage portion comprises a guidance tool for guiding and supporting the underfloor electronic equipment formed as a unit, a body-side connector corresponding to an electronic equipment-side connector formed to the electronic equipment, and a fixing tool for fixing the electronic equipment to the underfloor storage portion. The underfloor electronic equipment comprises a moving means guided by the guidance tool and the electronic equipment-side connector corresponding to the body-side connector.

Abstract: A front end portion 100 is disposed on the front end of a car body. The floor thereof consists of extruded hollow members 210 that constitute a shock absorber 200. The shock absorber 200 is divided into an upper shock absorber 200 and a lower shock absorber 200. Annealed extruded hollow members are used to form the hollow member 210. The hollow members 210 are disposed so that their direction of extrusion corresponds to the longitudinal direction of the car body. The hollow members 210 are divided longitudinally into two portions by a plate 220. At the width-direction ends of member 210, the face plates 211 and 212 are welded onto plates 223-226. Upon receiving impact load, members 210 fold up into concertinas, absorbing the impact force. Since members 210 are separated by a plate, they deform evenly and continuously into concertinas instead of being bent in half, capable of absorbing a large energy.

Abstract: A front end portion 100 is disposed on the front end of a car body. The floor thereof consists of extruded hollow members 210 that constitute a shock absorber 200. The shock absorber 200 is divided into an upper shock absorber 200 and a lower shock absorber 200. Annealed extruded hollow members are used to form the hollow member 210. The hollow members 210 are disposed so that their direction of extrusion corresponds to the longitudinal direction of the car body. The hollow members 210 are divided longitudinally into two portions by a plate 220. At the width-direction ends of member 210, the face plates 211 and 212 are welded onto plates 223-226. Upon receiving impact load, members 210 fold up into concertinas, absorbing the impact force. Since members 210 are separated by a plate, they deform evenly and continuously into concertinas instead of being bent in half, capable of absorbing a large energy.

Abstract: End portions of face plates 21 and 22 of a hollow extruded frame member 20 are connected with a rib 24 and these end portions are welded to end portions of face plates 11 and 12 of a hollow extruded frame member 10 using friction stir welding. A visible outline of a connection portion of the end portion of the face plate 21 and the rib 24 is constituted by circular arcs 31 and 32 which are recessed in the hollow extruded frame member 20. A visible outline of a connection portion of the end portion of the face plate 22 and the rib 24 is constituted by circular arcs 33 and 34 which are recessed in the hollow extruded frame member 20. The diameter of the circular arc 31 (33) is smaller than the diameter of the circular arc 32 (34). Accordingly, a structural body having a light weight structure can be obtained.

Abstract: Abutted portion of face plates 12b and 22b of frame members 10 and 20 are friction stir welded. With the abutting, a projecting portion 20c of an end portion of the face plate 20b of the frame member 20 is inserted into a recessed portion 12c of an end portion of the face plate 12b of the frame member 10. By this engagement, the outer faces on one face side of the face plates 12b and 20b form a smooth surface, so that at the joined edges there is no step. Next, a rotary tool 250 is inserted into the gas between the abutted plates from the side of the raised portions 16 and 26 side of the face plates 12b and 20b, while the other faces 12bc and 20bc of the face plates 12b and 20b, are supported flatly on a bed during the friction stir welding. Accordingly, the welding of the engaged plates can be carried out without any step-wise difference.

Abstract: Abutted portions of face plates 12b and 22b of frame members 10 and 20 are friction stir welded. With the abutting, a projecting portion 20c of an end portion of the face plate 20b of the frame member 20 is inserted into a recessed portion 12c of an end portion of the face plate 12b of the frame member 10. By this engagement, the outer face on one face side of the face plates 12b and 20b form a smooth surface, so that there is no step at the joined edges. Next, a rotary tool 250 is inserted into the gap between the abutted plates, from the side of the raised portions 16 and 26 of the face plates 12b and 20b, while the other faces 12bc and 20bc of the face plates 12b and 20b are supported flatly on a bed during the friction stir welding. Accordingly, the welding of the engaged plates can be carried out without any step-wise difference.

Abstract: The present invention aims to manufacture a car body with ease. A hollow material 10 comprises the lower portion of a side structure 201 of the car body. A face plate 11 of the hollow material 10 at the external side of the car has a lower end which projects further downward than a face plate 12 at the internal side of the car. The lower ends of the face plates 11, 12 are connected by a rib 13. The hollow portion thus formed is triangular in shape. A rib 14 above the rib 13 is formed horizontally. The face plates 11, 12 and a rib 15 positioned above the rib 14 are eliminated from the region of one or more doorways 220. The lower end of the doorway 220 of the side structure 201 is equipped with the hollow portion, so that it stays strong against transfer of the side structure. A hollow-shaped material 110, which comprises the end portion of an underframe 203, has an end portion in the width direction which forms a slope (rib 114) facing towards the upper side of the external side of the car.

Abstract: The present invention aims to manufacture a car body with ease.

Abstract: When an insertion force of a rotary tool 340 has searched, it is made clearly that the force at the insertion initial time is large and when a friction stir joining is an ordinary operation time, the force becomes small. According, it is preferable to make small the insertion force at the insertion initial time. To members 20, 30 to be subjected to a joining at a position where the friction stir joining starts a hole 50 is opened, and this hole 50 after the rotary tool 340 has inserted, since a move of the rotary tool 340 is made to begin, a lowering of the insertion force can be attained.