JPH0742973B2 - Spring washer - Google Patents
Spring washerInfo
- Publication number
- JPH0742973B2 JPH0742973B2 JP60214052A JP21405285A JPH0742973B2 JP H0742973 B2 JPH0742973 B2 JP H0742973B2 JP 60214052 A JP60214052 A JP 60214052A JP 21405285 A JP21405285 A JP 21405285A JP H0742973 B2 JPH0742973 B2 JP H0742973B2
- Authority
- JP
- Japan
- Prior art keywords
- spring washer
- temperature
- bolt
- shape
- fastening
- 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 - Lifetime
Links
Landscapes
- Bolts, Nuts, And Washers (AREA)
Description
【発明の詳細な説明】 （イ）発明の目的 ［産業上の利用分野］ この発明は捩子、ボルトの緩み防止に使用するスプリン
グワッシャに関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Purpose of the invention [Industrial field of application] The present invention relates to a spring washer used for preventing loosening of a screw and a bolt.
［従来の技術］ 捩子・ボルトの締結力の緩和防止、いわゆる緩み止めと
してばね座金（スプリングワッシャ）が用いられてい
る。[Prior Art] A spring washer is used to prevent loosening of the fastening force of a screw / bolt, that is, as a so-called loosening prevention.
ボルト、ナット、基材（締結対象物）及び座金が同一材
質である場合には、締結時より温度が著しく上昇して
も、互にほぼ同じ熱膨脹を示すため、締結力の緩和はそ
れ程問題にならない。If the bolts, nuts, base materials (objects to be fastened) and washers are made of the same material, even if the temperature rises significantly from the time of fastening, they all show almost the same thermal expansion, so relaxation of fastening force becomes a serious problem. I won't.
［発明が解決しようとする問題点］ しかしながら、各構成要素、即ち、ボルト、ナット、基
材及びスプリングワッシャが同一素材であることは希で
あり、また、最近の新素材を用いた極限技術において、
締結時を数百℃以上上回る温度での使用も珍しいことで
はない。このような大きな温度変化がある場合には、ス
プリングワッシャの熱膨脹よりもボルトの熱膨脹の方が
大きくなる場合があり、この場合はスプリングワッシャ
が緩み止めとして機能し得ず、締結力は低下する。[Problems to be Solved by the Invention] However, it is rare that each component, that is, the bolt, the nut, the base material and the spring washer are made of the same material, and in the limit technology using recent new materials. ,
It is not uncommon to use at a temperature that exceeds several hundred degrees Celsius above the time of fastening. When such a large temperature change occurs, the thermal expansion of the bolt may become larger than the thermal expansion of the spring washer. In this case, the spring washer cannot function as a loosening stopper, and the fastening force is reduced.
このようなことから、大きな温度差によってボルトが大
きく熱膨脹した場合であっても、なお締結力を維持し得
るスプリングワッシャが望まれている。For this reason, there is a demand for a spring washer that can maintain the fastening force even when the bolt undergoes a large thermal expansion due to a large temperature difference.
この発明は上記の如き事情に鑑みてなされたものであっ
て、締結時よりも温度が著しく上昇しても、なお、締結
力を維持し得るスプリングワッシャを提供することを目
的とするものである。The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a spring washer that can maintain the fastening force even if the temperature is significantly higher than that at the time of fastening. .
（ロ）発明の構成 ［問題を解決するための手段］ この目的に対応して、この発明のスプリングワッシャ
は、セラミックス製の部材を締結するボルトに使用され
るスプリングワッシャであって、ほぼ５℃乃至10℃の変
態点以上の温度で隆起した形状をなす形状記憶合金製の
素材を変態点以下の温度において短縮した形状に塑性変
形させて使用温度における前記ボルトの熱膨張量を上回
る変形量を記憶させてなることを特徴とするスプリング
ワッシャしている。(B) Configuration of the Invention [Means for Solving the Problem] To this end, the spring washer of the present invention is a spring washer used for a bolt for fastening a member made of ceramics, and is about 5 ° C. A deformation amount exceeding the thermal expansion amount of the bolt at the operating temperature by plastically deforming a material made of a shape memory alloy having a shape raised at a temperature of 10 ° C or higher to a transformation point to a shortened shape at a temperature of the transformation point or lower. It has a spring washer characterized by being remembered.
以下、この発明の詳細を一実施例を示す図面について説
明する。Hereinafter, details of the present invention will be described with reference to the drawings illustrating an embodiment.
第１図において、１はこの発明の一実施例に係わるスプ
リングワッシャである。スプリングワッシャ１は円環状
をなし一部分に切欠部２が設けられている。In FIG. 1, reference numeral 1 is a spring washer according to an embodiment of the present invention. The spring washer 1 has an annular shape and a notch 2 is provided in a part thereof.
スプリングワッシャ１はその素材がNiTi合金等の形状記
憶金属からなり、５℃乃至10℃の温度においては、第３
図に示す如き、スプリングワッシャが隆起した形状とな
るように成形加工されている。即ち、形状回復終了温度
（以後変態点という）が前記５℃〜10℃になるような割
合のNiTi合金等の形状記憶金属で、前記第１図に示す形
状に成形した素材をこの形状に拘束して、アルゴンガス
中で950℃で１時間保持した後、そのまま炉の中で冷却
し、更に大気炉中で300℃を30分間保持することによ
り、前記第１図に示す形状の記憶を有するスプリングワ
ッシャ１が得られるものである。これを変態点より十分
低い温度、例えば０℃の雰囲気で塑性変形して、第２図
に示すような端部が切欠部２で相接した元の環状のスプ
リングワッシャとし、使用前は冷凍庫等の変態点より十
分低い温度で保存しておく。ボルト、ナットの使用温度
が常温より十分高い場合には、その温度に対応した変態
点を有する形状記憶合金を使用することにより効果的な
締結を得ることができる。The spring washer 1 is made of a shape memory metal such as a NiTi alloy, and has a third shape at a temperature of 5 to 10 ° C.
As shown in the figure, the spring washer is molded so as to have a raised shape. That is, a shape memory metal such as a NiTi alloy having a ratio such that the shape recovery end temperature (hereinafter referred to as a transformation point) is 5 ° C to 10 ° C is used to constrain the material formed into the shape shown in Fig. 1 to this shape. Then, it is kept in argon gas at 950 ° C. for 1 hour, then cooled in the furnace as it is, and further kept at 300 ° C. in the atmospheric furnace for 30 minutes, so that it has a memory of the shape shown in FIG. The spring washer 1 is obtained. This is plastically deformed in an atmosphere at a temperature sufficiently lower than the transformation point, for example, 0 ° C., to form an original annular spring washer whose ends are in contact with each other at the notch 2 as shown in FIG. Store at a temperature well below the transformation point of. When the operating temperature of the bolts and nuts is sufficiently higher than room temperature, effective fastening can be obtained by using a shape memory alloy having a transformation point corresponding to the temperature.
［作用］ このように構成されたスプリングワッシャ１を使用する
場合、第３図に示すように、セラミックス製の基材4,5
を金属製のボルト６、ナット７で締結する場合、通常の
スプリングワッシャの使用方法と同様に、ボルト６と基
板４の間、若しくはナット７と基材５の間のスプリング
ワッシャ１を嵌装するが、この締結作業はボルト６、ナ
ット７及び基材4,5並びにスプリングワッシャ１共に変
態温度以上にならないようにする。締結作業が終了した
ら、温度の拘束を解除する。[Operation] When the spring washer 1 configured as described above is used, as shown in FIG.
In the case of tightening with a metal bolt 6 and a nut 7, the spring washer 1 is fitted between the bolt 6 and the substrate 4 or between the nut 7 and the base material 5 as in the case of using a normal spring washer. However, this fastening operation is performed so that the bolt 6, the nut 7, the base materials 4 and 5, and the spring washer 1 do not exceed the transformation temperature. When the fastening work is completed, the temperature constraint is released.
次に、このような締結部分が高温になるとボルト６は熱
膨脹により隆起するが、スプリングワッシャ１も変態点
以上に昇温することによって第１図に示す隆起した状態
に復元し、スプリングワッシャとしての機能を発揮し締
結力を維持する。Next, when the temperature of such a fastening portion becomes high, the bolt 6 bulges due to thermal expansion, but the spring washer 1 also returns to the bulged state shown in FIG. It exerts its function and maintains the fastening force.
（ハ）発明の効果 このように、この発明のスプリングワッシャでは、その
素材を形状記憶合金で構成するだけで、従来と同じ操作
と部品数で、締結時と使用時で大きな温度差が生じる場
合においても、温度上昇に伴うボルトの伸びを上回る変
形量を記憶させた形状記憶合金の形状復元によって確実
に締結力を維持することができる。(C) Effect of the Invention As described above, in the spring washer of the present invention, when the material is made of the shape memory alloy, the same operation and the same number of parts as in the conventional case cause a large temperature difference between the time of fastening and the time of use. Also in the above, the fastening force can be reliably maintained by the shape restoration of the shape memory alloy in which the deformation amount exceeding the elongation of the bolt due to the temperature rise is stored.
第１図は隆起した状態のスプリングワッシャを示す斜視
説明図、第２図は短縮した状態のスプリングワッシャを
示す斜視説明図、及び第３図はスプリングワッシャの使
用状態を示す縦断面図である。 １……スプリングワッシャ、２……切欠部、4,5……基
材、６……ボルト、７……ナットFIG. 1 is a perspective explanatory view showing a spring washer in a raised state, FIG. 2 is a perspective explanatory view showing a spring washer in a shortened state, and FIG. 3 is a vertical sectional view showing a usage state of the spring washer. 1 ... Spring washer, 2 ... Notch, 4,5 ... Substrate, 6 ... Bolt, 7 ... Nut
Claims (1)
使用されるスプリングワッシャであって、ほぼ５℃乃至
10℃の変態点以上の温度で隆起した形状をなす形状記憶
合金製の素材を変態点以下の温度において短縮した形状
に塑性変形させて使用温度における前記ボルトの熱膨張
量を上回る変形量を記憶させてなることを特徴とするス
プリングワッシャ。1. A spring washer used for a bolt for fastening a ceramic member, which has a temperature of about 5 ° C. or more.
The amount of deformation that exceeds the amount of thermal expansion of the bolt at the operating temperature is obtained by plastically deforming a shape memory alloy material that has a raised shape at a temperature above the transformation point of 10 ° C into a shortened shape at a temperature below the transformation point. Spring washer characterized by being made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60214052A JPH0742973B2 (en) | 1985-09-27 | 1985-09-27 | Spring washer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60214052A JPH0742973B2 (en) | 1985-09-27 | 1985-09-27 | Spring washer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62110013A JPS62110013A (en) | 1987-05-21 |
| JPH0742973B2 true JPH0742973B2 (en) | 1995-05-15 |
Family
ID=16649463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60214052A Expired - Lifetime JPH0742973B2 (en) | 1985-09-27 | 1985-09-27 | Spring washer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0742973B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015160173A1 (en) * | 2014-04-17 | 2015-10-22 | 한국과학기술연구원 | Screw coupling structure for preventing loosening and method for producing screw coupling structure for preventing loosening |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3830490A1 (en) * | 1987-10-28 | 1989-05-11 | Philips Corp | Resonator tuning device for keyboard percussion instruments |
| JPH01210607A (en) * | 1988-02-16 | 1989-08-24 | Tokyo Seimitsu Bane Kk | Open ring wave washer |
| JPH0732974Y2 (en) * | 1989-01-31 | 1995-07-31 | 橋本フォーミング工業株式会社 | Fastening structure for metal parts to be baked |
| JP4328229B2 (en) | 2003-06-04 | 2009-09-09 | 株式会社ユニオン精密 | Fastening structure using screw accessories and disassembly method using screw accessories |
| JP3916085B2 (en) | 2004-06-28 | 2007-05-16 | シャープ株式会社 | Fastening parts and equipment having a fastening structure |
| JP2006183827A (en) * | 2004-12-28 | 2006-07-13 | Sharp Corp | Fastening structure and assembling method of screw unit and article |
| JP2007046779A (en) * | 2005-07-14 | 2007-02-22 | Union Seimitsu:Kk | Assembly which is easily disassembled and fastened, structure which is easily disassembled and fastened, male screw for easy disassembling and fastening, male screw with washer for easy disassembling and fastening, and manufacturing method therefor |
| JP5099548B2 (en) | 2007-12-03 | 2012-12-19 | 学校法人東海大学 | Fastening structure |
| US20170035535A1 (en) * | 2014-04-17 | 2017-02-09 | Korea Institute Of Science And Technology | Screw coupling structure for preventing loosening and method for producing screw coupling structure for preventing loosening |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS588817A (en) * | 1981-07-03 | 1983-01-19 | 株式会社山科精工所 | Elastic washer |
-
1985
- 1985-09-27 JP JP60214052A patent/JPH0742973B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015160173A1 (en) * | 2014-04-17 | 2015-10-22 | 한국과학기술연구원 | Screw coupling structure for preventing loosening and method for producing screw coupling structure for preventing loosening |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62110013A (en) | 1987-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |