JPH0172925U

JPH0172925U -

Info

Publication number: JPH0172925U
Application number: JP1987168545U
Authority: JP
Priority date: 1987-11-05
Filing date: 1987-11-05
Publication date: 1989-05-17

Description

[Brief explanation of the drawing]

第１図は本考案の金型装置の一実施例の部分側
断面図、第２図及び第３図は第１図の−線及
び−線断面図、第４図は第１図示の装置によ
るサブパイプを含むメインフレームの斜視図、第
５図は第４図示のサブパイプ用のパイプ部材の部
分図、第６図は第４図示のサブパイプのメインフ
レームへの取付状態を説明する為の説明的部分斜
視図、第７図は従来の金型装置の部分側断面図、
第８図は第７図の−線断面図である。１……パイプ、２ａ……折曲部、２ｂ……基端
部近傍のパイプ部、２ｃ……基端部、２ｄ……先
端部、５……上型、５ａ……当接部、６……下型
。 FIG. 1 is a partial side sectional view of an embodiment of the mold apparatus of the present invention, FIGS. 2 and 3 are sectional views taken along lines - and - of FIG. 1, and FIG. A perspective view of the main frame including the subpipe, FIG. 5 is a partial view of the pipe member for the subpipe shown in FIG. 4, and FIG. 6 is an explanatory part for explaining how the subpipe shown in FIG. 4 is attached to the main frame. A perspective view, FIG. 7 is a partial side sectional view of a conventional mold device,
FIG. 8 is a sectional view taken along the - line in FIG. 7. DESCRIPTION OF SYMBOLS 1... Pipe, 2a... Bent part, 2b... Pipe part near the base end, 2c... Base end, 2d... Tip part, 5... Upper mold, 5a... Contact part, 6 ...lower mold.

Claims

[Scope of utility model registration request]

A bent portion of a predetermined length of a pipe with a circular cross section is crushed to form a crushed surface portion having an arcuate cross section from the base end to the distal end of the bent portion, and a crushed surface portion on the outside of the surface portion. A mold device comprising an upper mold and a lower mold for processing into a pipe shape having a cross-sectional shape that is not crushed along the cross-sectional shape of the pipe, and having an arc-shaped opening at the tip, the lower mold is It has an inner surface shape that follows the surface that is not crushed, and the shape of the portion of the upper mold that abuts from the proximal end to the distal end of the bent portion gradually changes from a convex shape projecting in an arcuate cross-sectional shape. A mold device for processing a pipe, characterized in that the shape changes to a concave shape concave in an arc shape.