JPS62152894U

JPS62152894U -

Info

Publication number: JPS62152894U
Application number: JP3976186U
Authority: JP
Priority date: 1986-03-20
Filing date: 1986-03-20
Publication date: 1987-09-28

Description

[Brief explanation of the drawing]

第１図は二層金属管の外観、第２図は第１図の
断面図、第３図は二層金属管より成形せるヘツド
・ラグ、第４図はヘツド・ラグの一部の断面図、
第５図は本考案の連結管の断面図、第６図はヘツ
ド・ラグの一つの円筒状突起に挿入せる本考案の
連結管の断面図である。１……異種金属二層管、２……アルミニウム管
、３……鋼管、４……二層管のヘツド・ラグ、５
……小外径部と大外径部とからなる連結管、５ａ
……小径部と大径部との接続段差。 Figure 1 is the external appearance of the two-layer metal tube, Figure 2 is a sectional view of Figure 1, Figure 3 is a head lug that can be formed from the two-layer metal tube, and Figure 4 is a cross-sectional view of a portion of the head lug. ,
FIG. 5 is a cross-sectional view of the connecting tube of the present invention, and FIG. 6 is a cross-sectional view of the connecting tube of the present invention that can be inserted into one cylindrical projection of the head lug. 1...Different metal double layer pipe, 2...Aluminum pipe, 3...Steel pipe, 4...Head lug of double layer pipe, 5
...Connecting pipe consisting of a small outer diameter part and a large outer diameter part, 5a
...Connection step between small diameter part and large diameter part.

Claims

[Scope of utility model registration request]

In a bicycle head lug comprising a plurality of two-layer cylindrical projections formed from a two-layer pipe material of different metals with a light metal tube as an outer layer and a steel pipe as an inner layer, the head lug should be inserted into and joined to the two-layer cylindrical projections. The connecting rod consists of two parts with different outer diameters, namely, a part with an outer diameter and length that can be inserted into the projection, and a part connected to the connecting rod and located outside the projection. is larger than the outer diameter of the former and corresponds to the inner diameter of the upper and lower pipes of the bicycle, and the length of the latter is at least twice the length of the former. connecting pipe.