JPS5836888Y2 - Tapping screw with built-in washer - Google Patents
Tapping screw with built-in washerInfo
- Publication number
- JPS5836888Y2 JPS5836888Y2 JP14892578U JP14892578U JPS5836888Y2 JP S5836888 Y2 JPS5836888 Y2 JP S5836888Y2 JP 14892578 U JP14892578 U JP 14892578U JP 14892578 U JP14892578 U JP 14892578U JP S5836888 Y2 JPS5836888 Y2 JP S5836888Y2
- Authority
- JP
- Japan
- Prior art keywords
- washer
- thread
- tapping screw
- screw
- built
- 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
Landscapes
- Bolts, Nuts, And Washers (AREA)
Description
【考案の詳細な説明】
本考案は座金組込みタッピングねじに係り、特に薄肉座
金が脱落したり、ねじ部に落込１ない様にした座金組込
みタッピングねじに関するものである。[Detailed Description of the Invention] The present invention relates to a tapping screw with a built-in washer, and particularly to a tapping screw with a built-in washer that prevents a thin washer from falling off or falling into a threaded portion.
従来この種ねじにおいては、ねじピッチが粗いこと及び
首下のねじ山形成始端部におけるねじ山の形成量が少く
しかも中途から開始する不完全な山形のために、第１図
に示す如く組込んだ薄肉座金１は振動等により、ねじ山
２の始端部２ａから容易に脱落すると共に、−担脱落し
た座金１がねじ山２に添って順次蛇行しながら脱落しね
じ部の途中に落ち込むこともある。Conventionally, this type of screw has a rough thread pitch, a small amount of thread formation at the starting end of the thread under the neck, and an incomplete thread shape that starts from the middle, so it is difficult to assemble the thread as shown in Figure 1. However, the thin washer 1 easily falls off from the starting end 2a of the thread 2 due to vibrations, etc., and the washer 1 that has fallen off may meander sequentially along the thread 2 and fall in the middle of the thread. be.
一方線付時においては、被締着部材Ａに押圧され座金１
は垂直に押上げられる結果、第２図に示す如く、途中位
置のねじ山に掛止され、所期のねじ締め機能を達成する
ことが出来ない等の欠陥があった。On the other hand, when attaching the wire, the washer 1 is pressed by the member A to be fastened.
As a result of being pushed up vertically, as shown in FIG. 2, there was a defect in that the screw thread was caught in an intermediate position, making it impossible to achieve the desired screw tightening function.
そこで本考案は、タッピングねじ首下のねじ山形成始端
部にタッピングねじとは別に座金係留用のねじ山を設け
、ねじ山形成始端部に２条のねじ山を形成することによ
り、直径を拡径せしめ、座金の脱落を防止して前記欠陥
を解決しうる座金組込みタッピングねじの提供を目的と
する。Therefore, in the present invention, a screw thread for washer mooring is provided separately from the tapping screw at the thread forming start end below the tapping screw head, and two threads are formed at the thread forming start end to increase the diameter. The object of the present invention is to provide a tapping screw with a built-in washer that can solve the aforementioned defects by increasing the diameter and preventing the washer from falling off.
以下本願の一実施例を詳記すると、第３図に示す如く表
面にプラス、マイナス等のドライバー作用溝を設けたね
じ頭部３首下の軸部４に座金１を嵌装したのち、リベッ
ト状の素材を転造加工により塑性変形させて１条のタッ
ピング用ねじ山２を形成し、第１図及び第２図に示す従
来周知の座金組込みタッピングねじと同様に構成すると
共に、この従来型の座金組込みタッピングねじのねじ山
２とは別の短い１条の座金係留用ねじ山５を、始端部の
ねじ山２ａと対向状で且つ同一方向に設けることにより
、ねじ山形成始端部に２条のねじ山を形出して成る座金
組込みタッピングねじである。Describing one embodiment of the present application in detail below, as shown in FIG. A single tapping screw thread 2 is formed by plastically deforming a shaped material by rolling processing, and the structure is similar to the conventional well-known washer-embedded tapping screw shown in FIGS. 1 and 2, and this conventional type By providing a short thread 5 for washer mooring, which is different from the thread 2 of the washer-integrated tapping screw, opposite to and in the same direction as the thread 2a at the starting end, 2 This is a self-tapping screw with a built-in washer formed by forming a threaded thread.
そしてこの座金係留用ねじ山５の形成方法に付いては例
えば第４図に示す如〈従来の平形ダイスＢの上部の各タ
ップ溝８１間に係留溝Ｂ２を設けるだけであとは従来と
同様の転進加工方法により容易に成形することが出来る
。The method for forming the screw thread 5 for washer mooring is as shown in FIG. 4, for example, as shown in FIG. It can be easily molded by the rolling process method.
尚座金係留用ねじ山５のリード角はタッピング用ねじ山
のリード角と等しくても、又はこれより鋭角ないし鈍角
にも出来ることは勿論である。It goes without saying that the lead angle of the washer mooring thread 5 may be equal to the lead angle of the tapping thread, or may be more acute or obtuse.
以上の構成による本願の座金組込みタッピングねじは、
第３図に示す如くねじ首下の軸部４に収嵌された座金１
を始端部のタンピング用ねじ山２ａと座金係留用ねじ山
５とにより直径ｄが拡径された始端部に平に保持され、
例え薄形座金であっても脱落することなく軸部４に回転
自在に嵌合され確実に係留出来ると共に、座金係留用ね
じ山５もタッピング用ねじ山２と同一円周方向に切られ
ているため、締付に際し何ら不都合を生じないばかりか
、両ねじ山のリード角を異らしめることにより強固に螺
着することが出来る。The tapping screw with a built-in washer of the present application with the above configuration is
The washer 1 is fitted into the shaft portion 4 under the screw head as shown in Fig. 3.
is held flat at the starting end whose diameter d is enlarged by the tamping thread 2a and the washer mooring thread 5 at the starting end,
Even if it is a thin washer, it can be rotatably fitted to the shaft portion 4 and securely moored without falling off, and the washer mooring screw thread 5 is also cut in the same circumferential direction as the tapping screw thread 2. Therefore, not only will there be no inconvenience when tightening, but also firm screwing can be achieved by making the lead angles of both threads different.
更に製造に際しても、平形ダイス丸形ダイス、その他従
来のダイスの一部を修正する程度の簡単な変更で良いこ
とから製造も容易で、実用的効果は大である。Further, in manufacturing, a simple modification such as modifying a part of a flat die, a round die, or other conventional dies is easy, and the practical effects are great.
第１図、第２図は従来の座金組込みタッピングねじに係
り、第１図は座金の脱落の態様を示す要部拡大図、第２
図は脱落した状態でねじ締めした場合の使用状態図、第
３図は本考案による座金組込みタッピングねじの要部拡
大図、第４図は本考案の座金組込みタッピングねじを転
造加工する平形ダイスである。
符号の説明、１・・・・・・座金、２・・・・・・タッ
ピング用ねじ山、３・・・・・・ねじ頭部、４・・・・
・・軸部、５・・・・・・座金係留用ねじ山、Ａ・・・
・・・被締着部材、Ｂ・・・・・・平形ダイス、Ｂ１・
・・・・・タンプ溝、Ｂ２・・・・・・係留溝。Figures 1 and 2 relate to a conventional tapping screw with a built-in washer. Figure 1 is an enlarged view of the main part showing how the washer falls off,
The figure shows a usage state when the screw is tightened in a state where it has fallen off. Figure 3 is an enlarged view of the main parts of the tapping screw with a built-in washer according to the present invention. Figure 4 shows a flat die for rolling the tapping screw with a built-in washer according to the present invention. It is. Explanation of symbols, 1...Washer, 2...Tapping screw thread, 3...Screw head, 4...
...Shaft, 5...Screw thread for washer mooring, A...
... Part to be fastened, B ... Flat die, B1.
...Tump groove, B2...Mooring groove.
Claims (1)
部４に座金１を嵌装すると共に、該首下軸部４に連続し
て１条のタッピング用ネジ山２を形成した座金組込みタ
ッピングねじにおいて、前記ねじ山２の始端部側には、
該ねじ山２とは別の短い１条の座金係留用ねじ山５を、
前記ねじ山２の始端部ねじ山２ａと対向状に突設させ、
当該始端部側に形成された２条のねじ山２ａ。 ５が協働して座金１の脱落を防止せしめたことを特徴と
する座金組込みタッピングねじ・２、前記タッピングね
じ用ねじ山２に対し、座金係留用ねじ山５のリード角を
異ならしめたことを特徴とする請求の範囲第１項記載の
座金組込みタッピングねじ。1. A washer-incorporated tapping device in which a washer 1 is fitted into the lower shaft portion 4 of a screw head 3 provided with an action groove of a screwdriver, and a single tapping screw thread 2 is continuously formed on the lower shaft portion 4. In the screw, on the starting end side of the thread 2,
A short thread 5 for washer mooring, which is different from the thread 2,
Protrudingly provided opposite to the starting end thread 2a of the thread 2,
Two threads 2a are formed on the starting end side. 5 cooperates to prevent the washer 1 from falling off. A tapping screw with a built-in washer according to claim 1, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14892578U JPS5836888Y2 (en) | 1978-10-31 | 1978-10-31 | Tapping screw with built-in washer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14892578U JPS5836888Y2 (en) | 1978-10-31 | 1978-10-31 | Tapping screw with built-in washer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5566212U JPS5566212U (en) | 1980-05-07 |
| JPS5836888Y2 true JPS5836888Y2 (en) | 1983-08-19 |
Family
ID=29131775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14892578U Expired JPS5836888Y2 (en) | 1978-10-31 | 1978-10-31 | Tapping screw with built-in washer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5836888Y2 (en) |
-
1978
- 1978-10-31 JP JP14892578U patent/JPS5836888Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5566212U (en) | 1980-05-07 |
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