JPS60165585U - drill bit - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来例の説明図、第２図は岩盤破砕方法の説明
図、第３図は本考案の実施例を示す縦断面図、第４図は
第３図のＩＶ−ＩＶ線断面図、第５図はサイドカッタが
拡張した状態の縦断面図、第６図は第５図のＶＩ−ＶＩ
線断面図、第７図は動作説明図、第８図は岩盤破砕方法
の説明図、第９図は他の動作説明図である。 １は胴体部、１ａは外周面、１０はサイドカッ　　゛り
。Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is an explanatory diagram of a rock crushing method, Fig. 3 is a vertical sectional view showing an embodiment of the present invention, and Fig. 4 is a sectional view taken along the line IV-IV of Fig. 3. , FIG. 5 is a vertical cross-sectional view of the side cutter in an expanded state, and FIG. 6 is a VI-VI view of FIG. 5.
A line sectional view, FIG. 7 is an explanatory diagram of the operation, FIG. 8 is an explanatory diagram of the rock crushing method, and FIG. 9 is an explanatory diagram of another operation. 1 is the body, 1a is the outer circumferential surface, and 10 is the side cut.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 切刃２を有する胴体部１の外周面１ａに溝を形成し、こ
の溝内にサイドカッタ１０を収納状態と外方に拡張した
状態とに移動自在に取付けると共に、収納状態に小さな
力で保持する部材を設けたことを特徴とするドリルビッ
ト＝A groove is formed in the outer circumferential surface 1a of the body part 1 having the cutting blade 2, and the side cutter 10 is mounted in this groove so as to be movable between a stored state and an outwardly expanded state, and is held in the stored state with a small force. A drill bit characterized by having a member that