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Patent Searching and Data


Title:
STRUCTURAL BODY
Document Type and Number:
Japanese Patent JP2000288749
Kind Code:
A
Abstract:

To reduce the weight of a joint by forming a connection line of a rib in the vicinity of a welded part to a face plate or a connection line of a projecting piece to the rib of the bead joint of a member comprising parallel face plates and the rib to connect these parallel plates to be of arc shape projecting to a hollow part side around the welded part side.

Hollow shapes 100, 110 are butted to each other, and inclined surfaces 122, 122 are brought into contact with each other. A rear surface of a face plate 111 (112) located at a hollow part 119 of the hollow shape 110 is connected to a rib 116 by an arc-like projecting portion 131 projecting to the hollow part 119 side and arcs 132, 133 recessed at both ends. A rotating body 20 is inserted in projecting portions 104, 114 of the hollow shapes 100, 110, and moved along the welding line, and the hollow shapes 100, 110 are friction-agitation joined. The load of the body 20 during the joining is sustained by the rib 106. The dotted line denotes the connection line of the rib 106 to the face plate 111. The sectional area can be reduced by the difference in portion between the dotted line and the solid line.


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Inventors:
ESUMI MASAKUNI
SATO AKIHIRO
FUKUYORI KAZUNARI
KAWASAKI TAKESHI
Application Number:
JP2000000060290
Publication Date:
October 17, 2000
Filing Date:
June 16, 1998
Export Citation:
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Assignee:
HITACHI LTD
HITACHI KASADO KIKAI CO LTD
International Classes:
E04B1/61; B23K20/12; B61D17/04; E04C2/08; E04C2/34; F16S1/12; B23K103/10; (IPC1-7): B23K20/12; B61D17/04; E04B1/61; E04C2/08; E04C2/34; F16S1/12
Attorney, Agent or Firm:
Yoshiaki Numagata (1 person outside)