JPH0376102U - - Google Patents

Description

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

第１図は本考案の一部の正面図、第２図は第１
図の要部の断面図、第３図は第１図の要部の背面
図、第４図は別考案の一部の正面図、第５図は第
４図の要部の断面図、第６図は第４図の要部の背
面図、第７図は従来例の一部の正面図、第８図は
第７図の要部の断面図、第９図は第７図の要部の
背面図である。 １……分度器板、１′……周縁、２……ブレー
ド、３……ボルト穴、４……ナツト、５……ボル
ト、６……切欠溝部。 Figure 1 is a front view of a part of the present invention, and Figure 2 is a front view of a part of the present invention.
3 is a rear view of the main part of Fig. 1, Fig. 4 is a front view of a part of another design, Fig. 5 is a sectional view of the main part of Fig. 4, Fig. 6 is a rear view of the main part of Fig. 4, Fig. 7 is a front view of a part of the conventional example, Fig. 8 is a sectional view of the main part of Fig. 7, and Fig. 9 is a main part of Fig. 7. FIG. 1... Protractor plate, 1'... Periphery, 2... Blade, 3... Bolt hole, 4... Nut, 5... Bolt, 6... Notch groove.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 分度器板の中心部にブレードを枢着し、このブ
レードの先端部にボルト穴を設け、このボルト穴
に嵌合しナツトを螺着するボルトを垂下し、この
ボルトの下端部に切欠溝部を設け、この切欠溝部
を分度器板の周縁に係合せしめ、ブレードを分度
器板上に廻動自在に設けたプロトラクターにおい
て、前記ボルト穴の形状と前記ボルトの断面形状
とをボルトが廻り止めとなる形状に設定したこと
を特徴とするプロトラクター。 A blade is pivotally attached to the center of the protractor plate, a bolt hole is provided at the tip of this blade, a bolt that fits into this bolt hole and screws a nut is hung down, and a notched groove is provided at the bottom end of this bolt. , in a protractor in which the cutout groove is engaged with the periphery of a protractor plate and the blade is rotatably provided on the protractor plate, the shape of the bolt hole and the cross-sectional shape of the bolt are such that the bolt does not rotate. A protractor characterized by being set to.