JPH043837Y2 - - Google Patents
Info
- Publication number
- JPH043837Y2 JPH043837Y2 JP1985196700U JP19670085U JPH043837Y2 JP H043837 Y2 JPH043837 Y2 JP H043837Y2 JP 1985196700 U JP1985196700 U JP 1985196700U JP 19670085 U JP19670085 U JP 19670085U JP H043837 Y2 JPH043837 Y2 JP H043837Y2
- Authority
- JP
- Japan
- Prior art keywords
- tailstock
- groove
- rotating body
- curved
- rod
- 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
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は例えば本件出願人が既に提案した実願
昭59−3220号、同3221号、同3222号、同3223号等
の製図器の鉛筆芯装置における芯押棒等の芯押棒
の基部の止着装置に関する。[Detailed description of the invention] [Industrial field of application] The present invention is applicable to the drawing instrument pencils disclosed in Utility Model Application No. 59-3220, No. 3221, No. 3222, and No. 3223, which have already been proposed by the applicant. The present invention relates to a fixing device for the base of a tailstock such as a tailstock in a core device.
従来の芯押棒すなわちワイヤは回転盤に巻きつ
けてその一端を止具により挟持して固定してい
た。
Conventional tailing rods, ie, wires, are wound around a rotary disk and held at one end by a stopper.
しかしこれでは筆圧（300g／cm2〜700g／cm2）
等の反力がその芯押棒の支持点に作用し、芯押棒
の一部に応力が集中するので多数回の使用により
その支持点が疲労して破断するおそれがあつた。
例えば従来最高の材質Ni，Cd鋼の芯押棒を用い
ても数万回しか使用できなかつた。この筆圧によ
る反圧は特に芯を繰り出したときに著しい。
However, with this, writing pressure (300g/cm 2 ~ 700g/cm 2 )
These reaction forces act on the support points of the tailstock rod, and stress is concentrated on a portion of the tailstock rod, so there is a risk that the support points will fatigue and break after multiple uses.
For example, even if we used a tailstock made of Ni or Cd steel, which was the best material in the past, it could only be used tens of thousands of times. The counter pressure caused by this writing pressure is particularly noticeable when the lead is extended.
本考案は回転体２には接線方向より徐々に曲率
半径が小さくなるように湾曲して回転体２の内方
に延びる外側が開放されていない溝８を設け、こ
の溝８内には芯押棒３の一端を導入し、その芯押
棒３の内端部３ａを固定したものである。
In the present invention, a groove 8 which is not open on the outside and which is curved so that the radius of curvature gradually becomes smaller in the tangential direction and extends inward of the rotor 2 is provided in the rotor 2, and a tailstock rod is provided in the groove 8. 3 is introduced, and the inner end 3a of the tailstock 3 is fixed.
上記芯押棒に作用する反力は湾曲した溝の壁面
で分散して支受されるので、反力が分散し、芯押
棒の一部に応力することがない。
Since the reaction force acting on the tailstock rod is dispersed and supported by the wall surface of the curved groove, the reaction force is dispersed and no stress is applied to a part of the tailstock rod.
第１図示のように軸１に枢着した回転体２の周
面には芯押棒３（ワイヤ）を案内する溝４を有す
る。上記回転体２の側面には中心角60°程度の切
欠部５を設け、この切欠部５内に扇形状の止具６
をビス７により止着する。第３図示のようにこの
止具６の内面には上記溝４に連通して中心に向か
つてつ字状に、すなわち接線方向より徐々に曲率
半径が小さくなるように湾曲して回転体２の内方
に延びる外側が開放されていない溝８を設け、こ
の溝８内に芯押棒３を導入してその内端部３ａを
かしめて固定する。
As shown in the first figure, the circumferential surface of a rotating body 2 pivotally mounted on a shaft 1 has a groove 4 for guiding a tailstock 3 (wire). A notch 5 with a central angle of approximately 60° is provided on the side surface of the rotating body 2, and a fan-shaped stop 6 is provided within this notch 5.
Fasten with screw 7. As shown in FIG. 3, the inner surface of the stop 6 is connected to the groove 4 and curved toward the center, that is, with the radius of curvature gradually decreasing from the tangential direction. A groove 8 that extends inward and is not open on the outside is provided, a tailstock 3 is introduced into the groove 8, and its inner end 3a is caulked and fixed.
この装置はかかる構成よりなるものであるか
ら、上記芯押棒３に作用する反力は接線方向より
徐々に曲率半径が小さくなるように湾曲して回転
体２の内方に延びる外側が開放されていない溝８
の壁面で分散して支受されるので、反力が分散
し、芯押棒３の一部に応力することがないもので
ある。 Since this device has such a configuration, the reaction force acting on the tailstock 3 is curved so that the radius of curvature gradually becomes smaller from the tangential direction, and the outer side extending inward of the rotating body 2 is open. No groove 8
Since it is dispersed and supported on the wall surface of the tailstock 3, the reaction force is dispersed and no stress is applied to a part of the tailstock 3.
第４図は本考案の他の実施例を示すもので回転
体２ａにおいてその周面の溝４の一部４ａを軸方
向に湾曲させてその内部に芯押棒３を挿入し、そ
の内端部３ａを止着したものである。 FIG. 4 shows another embodiment of the present invention, in which a part 4a of a groove 4 on the circumferential surface of a rotating body 2a is curved in the axial direction, a tailstock 3 is inserted into the inside of the groove 4, and the inner end of the groove 4 is curved in the axial direction. 3a is fixed.
以上のように本考案では芯押棒の一部に応力が
集中しないので破損し難く、安価な材料でも100
万回程度の多数回の使用に耐えるものである。
As described above, with this invention, stress is not concentrated on a part of the tailstock, so it is difficult to break, and even with inexpensive materials,
It can be used many times, about 10,000 times.
第１図は本考案の一実施例の側面図、第２図は
第１図Ａ−Ａ線断面図、第３図は第２図Ｂ−Ｂ線
よりみた止具の裏面図、第４図は本考案の他の実
施例の周面図である。
２……回転体、８……溝、３……芯押棒、３ａ
……内端部。
Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is a rear view of the stopper seen from the line B-B in Fig. 2, and Fig. 4. FIG. 3 is a circumferential view of another embodiment of the present invention. 2...Rotating body, 8...Groove, 3...Tailstock, 3a
...inner end.
Claims (1)
くなるように湾曲して回転体の内方に延びる外側
が開放されていない溝を設け、この溝内には芯押
棒の一端を導入し、その芯押棒の内端部を固定し
てなる芯押棒の基部の止着装置。 The rotating body is provided with a groove that is curved so that the radius of curvature gradually decreases in the tangential direction and extends inward of the rotating body and is not open on the outside. One end of the tailstock rod is introduced into this groove, and the A fixing device for the base of the tailstock that fixes the inner end of the tailstock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985196700U JPH043837Y2 (en) | 1985-12-20 | 1985-12-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985196700U JPH043837Y2 (en) | 1985-12-20 | 1985-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62104995U JPS62104995U (en) | 1987-07-04 |
| JPH043837Y2 true JPH043837Y2 (en) | 1992-02-05 |
Family
ID=31155762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985196700U Expired JPH043837Y2 (en) | 1985-12-20 | 1985-12-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH043837Y2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54160207U (en) * | 1978-04-27 | 1979-11-08 | ||
| JPS56133468U (en) * | 1980-03-11 | 1981-10-09 | ||
| JPS5953950U (en) * | 1982-10-01 | 1984-04-09 | アルプス電気株式会社 | Printer wire fixing mechanism |
| JPS60114891U (en) * | 1984-01-12 | 1985-08-03 | 久保 明郎 | Pencil lead device in drafting instruments |
-
1985
- 1985-12-20 JP JP1985196700U patent/JPH043837Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62104995U (en) | 1987-07-04 |
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