JPS62117009U

JPS62117009U -

Info

Publication number: JPS62117009U
Application number: JP548586U
Authority: JP
Priority date: 1986-01-17
Filing date: 1986-01-17
Publication date: 1987-07-25

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案に係るドリルビツトの実施例を示
し、第１図は一部切欠き正面図、第２図は底面図
、第３図は第１図における―線断面図、第４
図は要部の側面図、第５図は要部の切欠き正面図
、第６図は使用状態の縦断面図、第７図イ，ロ，
ハは不断水工法の作業工程図である。１……ビツト本体、２……チツプ、４……溝、
５……第１規制面、６……第２規制面、８……先
端部分、３……固定用ボルト、２ａ……切削刃、
２Ａ……端面。 The drawings show an embodiment of the drill bit according to the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a bottom view, Fig. 3 is a cross-sectional view taken along the line - - in Fig.
The figure is a side view of the main part, Fig. 5 is a cutaway front view of the main part, Fig. 6 is a longitudinal cross-sectional view of the main part, Fig. 7 is a, b,
Figure 3 shows the work process diagram for the uninterrupted water construction method. 1... Bit body, 2... Chip, 4... Groove,
5... First regulating surface, 6... Second regulating surface, 8... Tip portion, 3... Fixing bolt, 2a... Cutting blade,
2A... end surface.

Claims

【実用新案登録請求の範囲】ビツト本体１の先端に切削用のチツプ２を固
定してあるドリルビツトであつて、前記ビツト本
体１の先端部に、前記チツプ２を差込ませてその
チツプ２のビツト本体１に対するチツプ厚さ方向
の移動ならびに軸芯周りの回転を規制する溝４と
、この溝４に差込まれたチツプ２に当接してこの
チツプ２のビツト本体１に対する溝４に沿つての
移動を阻止する第１規制面５と、前記溝４に差込
まれたチツプ２に当接してこのチツプ２のビツト
本体１に対する設定以上の差込み移動を阻止する
第２規制面６とを形成し、前記溝４に差込まれた
チツプ２をそれの厚さ方向で貫通する状態で前記
溝４を挾んで対向する先端部分８同士を互いに引
寄せることにより、前記チツプ２を抜止めすると
ともに、前記先端部分８で前記チツプ２を挾持さ
せる固定用ボルト３を設けてあるドリルビツト。前記チツプ２が、ビツト軸芯方向で対向する
２つの辺夫々に切削刃２ａを備えたものである実
用新案登録請求の範囲第項に記載のドリルビツ
ト。前記チツプ２のビツト軸芯方向で対向する端
面２Ａが、チツプ厚さ方向視において中央部が突
出するヘの字形に形成されている実用新案登録請
求の範囲第項または第項に記載のドリルビツ
ト。前記第１形成面５および第２規制面６が、前
記チツプ２のへの字形の端面に整合する面７をも
つて形成されている実用新案登録請求の範囲第
項に記載ゐのドリルビツト。前記第１規制面５および第２規制面６を形成
する面７のうち、中央部よりも一方側に位置する
面部分７ａが一方の先端部分８に、かつ、他方側
に位置する面部分７ｂが他方の先端部分８にそれ
ぞれ、張出し形成されている実用新案登録請求の
範囲第項に記載のドリルビツト。[Claims for Utility Model Registration] A drill bit in which a cutting tip 2 is fixed to the tip of a bit body 1, the tip 2 being inserted into the tip of the bit body 1. A groove 4 that restricts the movement of the tip in the thickness direction with respect to the bit body 1 and rotation around the axis, and a groove 4 that abuts the tip 2 inserted into this groove 4 and moves the tip 2 along the groove 4 with respect to the bit body 1. and a second regulating surface 6 that comes into contact with the tip 2 inserted into the groove 4 and prevents the tip 2 from moving further than the setting with respect to the bit body 1. By penetrating the tip 2 inserted into the groove 4 in the thickness direction and drawing the tip portions 8 facing each other across the groove 4, the tip 2 is prevented from coming out. , a drill bit provided with a fixing bolt 3 for clamping the tip 2 at the tip end portion 8. The drill bit according to claim 1, wherein the tip 2 is provided with a cutting edge 2a on each of two sides facing each other in the axial direction of the bit. The drill bit according to claim 1 or 2, wherein the end faces 2A of the tip 2 facing each other in the bit axis direction are formed in a V-shape with a central portion protruding when viewed in the thickness direction of the tip. The drill bit according to claim 1, wherein the first forming surface 5 and the second regulating surface 6 are formed with a surface 7 that matches the U-shaped end surface of the tip 2. Among the surfaces 7 forming the first regulating surface 5 and the second regulating surface 6, a surface portion 7a located on one side of the center portion is located at one tip portion 8, and a surface portion 7b located on the other side. The drill bit according to claim 1, wherein each of the two tip portions is formed in an overhanging manner on the other end portion 8.