JPH03113708U

JPH03113708U -

Info

Publication number: JPH03113708U
Application number: JP2342990U
Authority: JP
Priority date: 1990-03-07
Filing date: 1990-03-07
Publication date: 1991-11-21

Description

[Brief explanation of drawings]

第１図は第２図の要部の詳細を示す側面図であ
る。第２図は本考案のコンビネーシヨンホルダの
一実施例を示す一部断面図である。第３図はツイ
ストドリルを示す側面図である。第４図は本考案
のコンビネーシヨンホルダの他の実施例の回り止
め部材を示す上面図である。第５図は従来のコン
ビネーシヨンホルダを示す一部縦断面図である。
第６図は第５図の長溝を示す上面図である。第７
図はツイストドリルの捩じれ溝とスローアウエイ
チツプとの良い位置関係を示す説明図である。第
８図はツイストドリルを研削した状態を示す説明
図である。第９図はツイストドリルの捩じれ溝と
スローアウエイチツプとの悪い位置関係を示す説
明図である。第１０図は直刃ドリルを示す側面図
である。主要な部分の符号の説明、４１……ホルダ本体
、４３……貫通孔、４５……スローアウエイチツ
プ、４９……回り止め部材、５３……ツイストド
リル、５７……係止部、６１……長溝、６３……
ドライブピン。 FIG. 1 is a side view showing details of the main parts of FIG. 2. FIG. 2 is a partial sectional view showing an embodiment of the combination holder of the present invention. FIG. 3 is a side view of the twist drill. FIG. 4 is a top view showing a rotation preventing member of another embodiment of the combination holder of the present invention. FIG. 5 is a partial vertical sectional view showing a conventional combination holder.
FIG. 6 is a top view showing the long groove of FIG. 5. FIG. 7th
The figure is an explanatory view showing a good positional relationship between the twist groove of the twist drill and the throw-away tip. FIG. 8 is an explanatory diagram showing a state in which the twist drill is ground. FIG. 9 is an explanatory diagram showing the poor positional relationship between the twist groove of the twist drill and the throw-away tip. FIG. 10 is a side view of the straight-edged drill. Explanation of symbols of main parts, 41... Holder body, 43... Through hole, 45... Throwaway tip, 49... Rotating member, 53... Twist drill, 57... Locking part, 61... Long groove, 63...
drive pin.

Claims

[Scope of utility model registration request]

a holder body in which a through hole is formed in the axial direction;
a throw-away tip detachably fixed to the tip of the holder body; a detent member inserted into the rear part of the through hole of the holder body so as to be movable in the axial direction; a locking part that locks the rear end of the twist drill formed and inserted from the tip opening of the through hole; a long groove formed in the holder body or the rotation prevention member; and a long groove formed in the rotation prevention member or the holder body. A combination holder comprising: a drive pin, one of which is fixed, and the other of which is fitted into the long groove, the long groove having a torsional angle that is the same as the twisting angle of the twist drill.