JPS61166721U

JPS61166721U -

Info

Publication number: JPS61166721U
Application number: JP5003585U
Authority: JP
Priority date: 1985-04-05
Filing date: 1985-04-05
Publication date: 1986-10-16

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例にかかるブローチの
正面図、第２図は第１図の拡大―断面図、第
３図は第１図の拡大―断面図、第４図は同じ
くその要部の拡大図、第５図はその作用説明図、
第６図は本考案の他の実施例にかかるブローチの
要部の正面図、第７図はその作用説明図である。
また、第８図は従来のブローチの一例の正面図、
第９図は第８図の拡大―断面図、第１０図は
その作用説明図である。図面中、１３は刃部、２０は丸刃、２１は切削
刃、２２はガイド部である。 FIG. 1 is a front view of a brooch according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of FIG. 1, FIG. 3 is an enlarged cross-sectional view of FIG. 1, and FIG. An enlarged view of the part, Figure 5 is an explanatory diagram of its function,
FIG. 6 is a front view of the main parts of a broach according to another embodiment of the present invention, and FIG. 7 is an explanatory view of its operation.
Moreover, FIG. 8 is a front view of an example of a conventional brooch,
FIG. 9 is an enlarged cross-sectional view of FIG. 8, and FIG. 10 is an explanatory diagram of its operation. In the drawings, 13 is a blade part, 20 is a round blade, 21 is a cutting blade, and 22 is a guide part.

Claims

[Scope of utility model registration request]

A broach characterized in that a guide portion is provided adjacent to the cutting blade between the cutting blades and the guide portion contacts the inner peripheral surface of the prepared hole of the workpiece to be machined.