JPS6334312A - Clamp screw - Google Patents
Clamp screwInfo
- Publication number
- JPS6334312A JPS6334312A JP17773186A JP17773186A JPS6334312A JP S6334312 A JPS6334312 A JP S6334312A JP 17773186 A JP17773186 A JP 17773186A JP 17773186 A JP17773186 A JP 17773186A JP S6334312 A JPS6334312 A JP S6334312A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- diameter
- set screw
- small diameter
- tightening
- 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.)
- Pending
Links
- 239000007788 liquid Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- VNTLIPZTSJSULJ-UHFFFAOYSA-N chromium molybdenum Chemical compound [Cr].[Mo] VNTLIPZTSJSULJ-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は止めねじに関し、特に、いったんある荷重で締
めつけたら外すことのないねじ止め構造に用いられる止
めねじに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a set screw, and particularly to a set screw used in a screw-fastening structure that cannot be removed once it has been tightened under a certain load.
従来ねじ止めによる締めつけで一定の荷重を得たい場合
には、ねじの締めつけトルクをトルクレンチ等により管
理していた。Conventionally, when tightening with screws to obtain a constant load, the tightening torque of the screws was controlled using a torque wrench or the like.
このように従来の方法ではトルクレンチを準備する必要
があり、棟た設定ミス等、作業上の誤りも多々発生した
。In this way, the conventional method requires the preparation of a torque wrench, and many operational errors, such as incorrect settings, occur.
本発明は、止めねじの軸の一部に、他の部分よ抄も径の
小さい小径部を設け、かつこの径を、ねじを締めつけた
と１！に発生するトルクが特定の憶に達したときにねじ
切れる値に設定したものである。The present invention provides a part of the shaft of a set screw with a small diameter part that is smaller in diameter than other parts, and this diameter is set to 1 when the screw is tightened. This value is set to a value that will cause the thread to break when the torque generated in the thread reaches a specific value.
ねじを締めつけて行き、小径部がねじ切れれば、所定の
締めつけ荷重が得られていることになる。As the screw is tightened, if the small diameter portion breaks, the predetermined tightening load has been obtained.
図は、本発明を圧力センサの封入液のシール部に適用し
た場合の一実施例を示す断面図である。The figure is a sectional view showing an embodiment in which the present invention is applied to a sealed liquid seal portion of a pressure sensor.
８１ダイアフラムを使用した工業用圧力上ンサでは、Ｓ
ｉチップの表面に被測定媒体が直接触れないように、シ
リコン油などで封入される。このような封入液は、いっ
たん注入してシールしたら、通常の状態では２ｙとその
シールを解除することはない。In industrial pressure sensors using 81 diaphragm, S
The surface of the i-chip is sealed with silicone oil or the like so that the medium to be measured does not come into direct contact with the surface of the i-chip. Once such a filling liquid is injected and sealed, the seal will not be released from 2y under normal conditions.
すなわち、いったんそのシールを解除してしまうと、単
にねじを締め直してみても、もと通りの特性は得られな
い。したがって、シールが破られないように所定の荷重
で確実に締めつける必佼があるとともに、いったんその
ようにして締めつけた後は、２度と緩める必要はない。In other words, once the seal is released, the original characteristics cannot be restored even if the screws are simply retightened. Therefore, it is necessary to reliably tighten the seal with a predetermined load so as not to break the seal, and once it has been tightened in this manner, there is no need to loosen it again.
そこで、図示のように、軸の一部にねじ部の谷径よりも
小さな小径部１１′ｔ−設けた止めねじ１を使用し、圧
力センサのボディ２に、注入口２Ａより封入液を注入し
た後、この注入口２ Ａ ｓ（鋼球３でふ嘔ざ、上から
上記止めねじ１で締めつける。Therefore, as shown in the figure, a set screw 1 having a small diameter portion 11't smaller than the root diameter of the threaded portion is used in a part of the shaft, and the filled liquid is injected into the body 2 of the pressure sensor from the injection port 2A. After that, open the injection port 2A s (with a steel ball 3) and tighten it with the set screw 1 from above.
ここで、止めねじ１としてＳＣＭ（クロムモリブデンｇ
Ａ）のＭ６ねじ（外径Ｄ ＝ ０．６ ｔｘ ）を用い
た場合に、Ｆ＝ １０００ｋｐの荷重を得るためには、
トルクＴは、
Ｔ＝αＩＦＤ＝０．ｌＸ１０００（ｋｙ）Ｘα６（α）
＝６０（ｋ郷）
このトルクでねじ切るためには、小径部１１の直径ｄ（
ａｍ）は、嵌置剪断応力τｌ＝ １００００ ｋｙ／−
とししたがって、小径部１１の直径ｄを３．１■とじて
おくことにより、締めつけによるトルクが６０ｋ ｆα
に達したところで上記小径部１１はねじ切れ、そのとき
には１０００ ｋ ｆの締めつけ力が得られていること
になる。このため、実際の作業では、この止めねじ１を
単にねじ切れるまで回し続けるのみで、自動的に締めつ
け荷重は一定に管理される。Here, SCM (chromium molybdenum g
When using the M6 screw (outer diameter D = 0.6 tx) in A), in order to obtain a load of F = 1000kp,
The torque T is T=αIFD=0. lX1000(ky)Xα6(α)
= 60 (k) In order to cut the thread with this torque, the diameter d (
am) is the inset shear stress τl = 10000 ky/-
Therefore, by keeping the diameter d of the small diameter portion 11 at 3.1 square meters, the tightening torque will be 60k fα
The small diameter portion 11 is threaded when it reaches this point, and at that time a tightening force of 1000 kf has been obtained. Therefore, in actual work, the tightening load is automatically managed at a constant level by simply continuing to turn the set screw 1 until it becomes threaded.
以上、圧力センサの封入液のシールに使用した場合を例
に説明したが、特定の締めつけ荷電が必要で、しかもい
ったん締めつけたら外すことのない構造であれば、不発
明の止めねじによるねじ止めはいずれも有効である。The above explanation is based on the case where it is used to seal the filled liquid of a pressure sensor, but if a specific tightening charge is required and the structure is such that it cannot be removed once it is tightened, screwing with the uninvented setscrew can be used. Both are valid.
また、上述した冥施例の止めねじ１は、六角穴付きであ
るが、本発明はこれに限定されるものではなく、その軸
の一部に、他よりも径の小さい小径部を設け、その径を
所定の値に設定したものであれば、その筏類は問わない
。Further, although the set screw 1 in the above-mentioned embodiment has a hexagonal hole, the present invention is not limited to this. The type of raft does not matter as long as its diameter is set to a predetermined value.
以上説明したように、本発明によれば、止めねじの一部
に１他の部分より小径の部分を設け、かつその径を、ね
じを締めつけたときに発生するトルクが特定の値に達し
たときにねじ切れる１１へに設定したことにより、トル
クレンチ等を使用することなく締めつけ荷重の管理が行
なえ、設定ミス等もなく、作業能率が向上するとともに
ねじ止め構造の品質を向上させることができる。As explained above, according to the present invention, a portion of a set screw is provided with a portion having a smaller diameter than other portions, and the diameter is set so that the torque generated when the screw is tightened reaches a specific value. By setting it to 11, which can sometimes break, the tightening load can be managed without using a torque wrench, etc., and there are no setting errors, improving work efficiency and improving the quality of the screwed structure. .
図面は本発明の一実施例を示すねじ止め部の断面図であ
る。
１・・＠拳止めねじ、１１−・・・小径部。The drawing is a cross-sectional view of a screwed part showing an embodiment of the present invention. 1...@Fist set screw, 11-...Small diameter part.
Claims (1)
この部分の径を、ねじを締めつけたときに発生するトル
クが特定の値に達したときに当該小径部分がねじ切れる
値に設定したことを特徴とする止めねじ。A part of the shaft has a small diameter part that is smaller than the other part,
A set screw characterized in that the diameter of this portion is set to a value that allows the small diameter portion to be threaded off when the torque generated when the screw is tightened reaches a specific value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17773186A JPS6334312A (en) | 1986-07-30 | 1986-07-30 | Clamp screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17773186A JPS6334312A (en) | 1986-07-30 | 1986-07-30 | Clamp screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6334312A true JPS6334312A (en) | 1988-02-15 |
Family
ID=16036131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17773186A Pending JPS6334312A (en) | 1986-07-30 | 1986-07-30 | Clamp screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6334312A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007146939A (en) * | 2005-11-25 | 2007-06-14 | Ntn Corp | Rotating device and set screw |
-
1986
- 1986-07-30 JP JP17773186A patent/JPS6334312A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007146939A (en) * | 2005-11-25 | 2007-06-14 | Ntn Corp | Rotating device and set screw |
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