JPH0419445Y2 - - Google Patents
Info
- Publication number
- JPH0419445Y2 JPH0419445Y2 JP7151489U JP7151489U JPH0419445Y2 JP H0419445 Y2 JPH0419445 Y2 JP H0419445Y2 JP 7151489 U JP7151489 U JP 7151489U JP 7151489 U JP7151489 U JP 7151489U JP H0419445 Y2 JPH0419445 Y2 JP H0419445Y2
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- blade
- protractor
- protractor plate
- notch groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000005259 measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、角度を測定するのに広く用いられる
ブレードを有するプロトラクターに係るものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a protractor with a blade that is widely used for measuring angles.
従来、比較的大きなプロトラクターは、第７
図、第８図及び第９図に示すように単に分度器板
１の中心部Ｏに枢着したブレード２の先端部にボ
ルト穴３を設け、このボルト穴３に嵌合しナツト
４を螺着するボルト５を垂下し、このボルト５の
下端部に切欠溝部６を設け、この切欠溝部６を分
度器板１の周縁１′に係合せしめブレード２をナ
ツト４を少し緩めた状態で分度器板１上に廻動自
在に設けていた。
Traditionally, relatively large protractors are
8 and 9, simply provide a bolt hole 3 at the tip of the blade 2 which is pivoted to the center O of the protractor plate 1, fit into this bolt hole 3, and screw the nut 4. A notched groove 6 is provided at the lower end of the bolt 5, and the notched groove 6 is engaged with the peripheral edge 1' of the protractor plate 1, and the blade 2 is attached to the protractor plate 1 with the nut 4 slightly loosened. It was mounted on the top so that it could rotate freely.
〔考案が解決しようとする課題〕
しかしながら、このような従来のプロトラクタ
ーにおいて角度測定の際ブレード３を廻動し過ぎ
て分度器板１よりブレード２を過つて外してしま
う場合、即ちブレード２を廻動し過ぎてボルト５
の下端部の切欠溝部６より分度器板１の周縁１′
を外してしまう場合がよくあり、この場合にブレ
ード２を逆に廻動して再びボルト５の切欠溝部６
に分度器板１の周縁１′を係合させることは、こ
のブレード２が外れている間ボルト５はフリーと
なるため容易に切欠溝部６の位置ずれを生じるか
ら簡単にはいかず、ボルト５を廻動し正しい位置
に切欠溝部６を保持しつつ切欠溝部６に分度器板
１の周縁１′を係合せしめなければならず非常に
厄介であつた。[Problem to be solved by the invention] However, in such a conventional protractor, when the blade 3 is rotated too much during angle measurement and the blade 2 is removed from the protractor plate 1, there is a problem in which the blade 2 is rotated too much. Move too much bolt 5
From the notch groove 6 at the lower end of the protractor plate 1 to the peripheral edge 1'
In this case, the blade 2 is rotated in the opposite direction and the notch groove 6 of the bolt 5 is removed again.
It is not easy to engage the peripheral edge 1' of the protractor plate 1 with the blade 2 because the bolt 5 is free while the blade 2 is removed, which easily causes the position of the notch groove 6 to shift. It was very troublesome to engage the peripheral edge 1' of the protractor plate 1 with the notch groove 6 while holding the notch groove 6 in the correct position.
本考案は、このような欠点を解決したプロトラ
クターを提供するものである。 The present invention provides a protractor that solves these drawbacks.
添付図面を参照して詳述すると次の通りであ
る。
The details are as follows with reference to the accompanying drawings.
分度器板１の中心部Ｏにブレード２を枢着し、
このブレード２の先端部にボルト穴３を設け、こ
のボルト穴３に嵌合しナツト４を螺着するボルト
５を垂下し、このボルト５の下端部に切欠溝部６
を設け、この切欠溝部６を分度器板１の周縁１′
に係合せしめ、ブレード２を分度器板１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３の形状と前記ボルト５の断面形状とをボル
ト５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に係るものである。 A blade 2 is pivotally attached to the center O of the protractor plate 1,
A bolt hole 3 is provided at the tip of this blade 2, a bolt 5 that fits into this bolt hole 3 and screws a nut 4 is hung down, and a notched groove 6 is provided at the lower end of this bolt 5.
This notch groove 6 is connected to the peripheral edge 1' of the protractor plate 1.
In the protractor in which the blade 2 is rotatably provided on the protractor plate 1, the shape of the bolt hole 3 and the cross-sectional shape of the bolt 5 are set to a shape that prevents the bolt 5 from rotating. This relates to a protractor characterized by:
ナツト３を少し緩めて、ボルト５の切欠溝部６
を分度器板１の周縁１′に係合した状態でブレー
ド２を分度器板１上を廻動させて角度測定を行
う。
Slightly loosen the nut 3 and remove the notch groove 6 of the bolt 5.
The angle is measured by rotating the blade 2 over the protractor plate 1 with the blade 2 engaged with the peripheral edge 1' of the protractor plate 1.
ブレード２を例えば百数十度を測定した後数度
を測定するため大きく廻動させるととき、過つて
廻動し過ぎて分度器板１上から外してしまつた場
合、即ちボルト５の切欠溝部６より分度器板１の
周縁１′を外してしまつた場合において、ボルト
穴３の形状とボルト５の断面形状とによりボルト
５は廻動せず、ボルト５の切欠溝部６は位置ずれ
を生じない。 For example, when the blade 2 is rotated widely to measure several degrees after measuring 100-odd degrees, if the blade 2 is rotated too much and is removed from the top of the protractor plate 1, in other words, the notch groove 6 of the bolt 5 Even if the peripheral edge 1' of the protractor plate 1 is removed, the bolt 5 will not rotate due to the shape of the bolt hole 3 and the cross-sectional shape of the bolt 5, and the notch groove 6 of the bolt 5 will not be displaced.
従つて、ブレード２を逆方向に廻動すればスム
ーズに切欠溝部６に分度器板１の周縁１′が係合
し、もとの測定状態に係合復帰する。 Therefore, by rotating the blade 2 in the opposite direction, the peripheral edge 1' of the protractor plate 1 smoothly engages with the notch groove 6, and the engagement returns to the original measurement state.
第１図、第２図及び第３図は、本考案の一実施
例を図示したものである。
1, 2 and 3 illustrate an embodiment of the present invention.
図面のボルト穴３はＤ型形状とし、ボルト５も
面取りして断面形状をＤ型形状としてボルト５を
廻り止めとした場合を図示している。 The bolt hole 3 in the drawing is D-shaped, and the bolt 5 is also chamfered to have a D-shaped cross section to prevent the bolt 5 from rotating.
尚、図中符号７は、分度器板１の測定底面１″
に沿わせて分度器板１の裏面に設けたガイドバー
であり、いわゆる二本ざおタイプのプロトラクタ
ーを図示している。 In addition, the reference numeral 7 in the figure indicates the measurement bottom surface 1'' of the protractor plate 1.
This is a guide bar provided on the back side of the protractor plate 1 along the so-called two-rod type protractor.
また、第４図、第５図及び第６図は、本考案と
同様の目的及び効果を果たす別考案を図示たもの
であり、ボルト５の下端部の周縁全周を一回り切
り欠いた状態の切欠溝部６を形成し、ブレード２
が分度器板１の周縁１′から外れてボルト５がフ
リーとなつてボルト５が廻動しても切欠溝部６が
全周にあるからどの位置からでもスムーズにもと
の測定状態に係合復帰できる場合を図示してい
る。 Moreover, FIGS. 4, 5, and 6 illustrate another design that achieves the same purpose and effect as the present invention, in which the entire circumference of the lower end of the bolt 5 is cut out. The notch groove 6 is formed, and the blade 2
Even if the bolt 5 comes off the periphery 1' of the protractor plate 1 and the bolt 5 rotates, the notch groove 6 is around the entire circumference, so it can smoothly return to the original measurement state from any position. This diagram shows cases where this is possible.
本考案は、上述のように構成したから過つてブ
レードを廻動し過ぎて分度器板よりブレードを外
してしまつた場合、即ちブレードを廻動し過ぎて
ボルトの下端部の切欠溝部より分度器板の周縁を
外してしまつた場合においても、ボルトは廻動せ
ず切欠溝部は位置ずれを生じないため単にブレー
ドを逆に廻動するだけでスムーズにボルトの切欠
溝部に分度器板の周縁を係合させ、測定状態に係
合復帰させるこができるプロトラクターとなる。
Since the present invention is configured as described above, if the blade is accidentally rotated too much and the blade is removed from the protractor plate, in other words, if the blade is rotated too much and the protractor plate is removed from the notch groove at the lower end of the bolt. Even if the periphery is removed, the bolt will not rotate and the notch groove will not shift, so simply rotating the blade in the opposite direction will smoothly engage the periphery of the protractor plate with the notch groove of the bolt. , it becomes a protractor that can be engaged and returned to the measurement state.
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)
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 notched groove portion 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7151489U JPH0419445Y2 (en) | 1989-06-19 | 1989-06-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7151489U JPH0419445Y2 (en) | 1989-06-19 | 1989-06-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0376102U JPH0376102U (en) | 1991-07-30 |
| JPH0419445Y2 true JPH0419445Y2 (en) | 1992-05-01 |
Family
ID=31608613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7151489U Expired JPH0419445Y2 (en) | 1989-06-19 | 1989-06-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419445Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4788718B2 (en) * | 2008-01-31 | 2011-10-05 | アイコム株式会社 | Heat dissipation device for electronic equipment |
-
1989
- 1989-06-19 JP JP7151489U patent/JPH0419445Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0376102U (en) | 1991-07-30 |
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