JPH0752969Y2 - Tapping screw - Google Patents
Tapping screwInfo
- Publication number
- JPH0752969Y2 JPH0752969Y2 JP1070192U JP1070192U JPH0752969Y2 JP H0752969 Y2 JPH0752969 Y2 JP H0752969Y2 JP 1070192 U JP1070192 U JP 1070192U JP 1070192 U JP1070192 U JP 1070192U JP H0752969 Y2 JPH0752969 Y2 JP H0752969Y2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- groove
- notch groove
- respect
- thread
- 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
- Transmission Devices (AREA)
- Forging (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、タッピングネジに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapping screw.
【０００２】[0002]
【従来の技術及び解決しようとする課題】タッピングネ
ジは、ネジ加工の施されていない相手部材に対し、自ら
のタッピング効果を利用してねじ込み、締付け力を持続
させることによって、２つの部材を半永久的に接合せし
めるものである。2. Description of the Related Art A tapping screw is a semi-permanent member that is screwed into a mating member that has not been threaded by utilizing its own tapping effect to maintain the tightening force. It is the one that can be joined together.
【０００３】従ってタッピングネジには、最初の食い込
みが安定すること、迅速なねじ込みが可能であること、
確実な保持力を有し緩み難いこと、ネジ山が十分な強度
を有することが要求される。Therefore, the tapping screw has a stable initial bite, and quick screwing is possible.
It is required to have a reliable holding force, be hard to loosen, and have a sufficient strength of the screw thread.
【０００４】しかし、上記条件を全て満足するタッピン
グネジは実現されていなかった。本考案は上記問題を解
決できるタッピングネジを明らかにするものである。However, a tapping screw satisfying all the above conditions has not been realized. The present invention discloses a tapping screw that can solve the above problems.
【０００５】[0005]
【課題を解決する手段】本考案のタッピングネジは、先
端側が縮径し且つ先端部が丸く形成されたネジ軸(１)の
先端側のネジ山(２)に対し、周方向に等間隔に３本の切
欠溝(３)が夫々隣り合う複数の螺旋条(20)(20)(20)に跨
がって開設され、切欠溝(３)はネジ山の傾きに対して直
角に近づく方向に且つネジ軸(１)の軸芯に対して１０〜
２０゜傾き、切欠溝(３)とネジ山(２)の交叉部に於て、
溝の両側の山壁端面の内、ネジの進行側の端面は溝底に
対して略垂直の縦壁面(21)となっており、他方の端面は
ネジの進行方向に対して逃げ方向に傾斜した傾斜面(22)
となっている。The tapping screw of the present invention has a screw shaft (1) having a diameter reduced at the tip side and a rounded tip portion, at equal intervals in the circumferential direction with respect to the thread (2) at the tip side. Three notch grooves (3) are opened across a plurality of adjacent spiral stripes (20), (20), (20), and the notch groove (3) approaches a right angle to the inclination of the screw thread. 10 to the axis of the screw shaft (1)
At an angle of 20 °, at the intersection of the notch groove (3) and the screw thread (2),
Of the mountain wall end faces on both sides of the groove, the end face on the screw advancing side is a vertical wall surface (21) that is substantially perpendicular to the groove bottom, and the other end face is inclined in the escape direction with respect to the screw advancing direction. Inclined surface (22)
Has become.
【０００６】３本の切欠溝(３)はネジ軸(１)の周方向に
等間隔に開設されているため、ネジ込みの開始時は、ネ
ジ軸は常に下孔の孔縁に３点接触するため、安定してね
じ込むことが出来る。Since the three notch grooves (3) are provided at equal intervals in the circumferential direction of the screw shaft (1), the screw shaft always comes into contact with the hole edge of the pilot hole at three points at the start of screwing. Therefore, it can be screwed in stably.
【０００７】切欠溝(３)は軸芯に対して、１０〜２０゜
傾いているため、切欠溝(３)を転造ダイスで成形する
際、ダイスの移動に追従して安定して軸部が回転し、精
度よく切欠溝(３)が形成できる。Since the notch groove (3) is inclined by 10 to 20 ° with respect to the shaft center, when the notch groove (3) is formed by a rolling die, the shaft portion is stably followed by the movement of the die. By rotating, the notch groove (3) can be formed accurately.
【０００８】切欠溝(３)が軸芯に対して、１０゜以下で
あると、溝を形成するためのダイスの突条の全長が同時
に軸部に掛るため、大きな加圧力を必要とし、又、切欠
溝(３)が軸心に対して２０゜以上傾いていれば、溝を形
成するためのダイスの突条が軸部に対して点当りとな
り、軸部が安定せず精度よく切欠溝(３)を形成すること
はできない。If the notch groove (3) is 10 ° or less with respect to the shaft center, the entire length of the ridge of the die for forming the groove is applied to the shaft portion at the same time, which requires a large pressing force. If the notch groove (3) is inclined by 20 ° or more with respect to the shaft center, the protrusion of the die for forming the groove will come into point contact with the shaft portion, and the shaft portion will not be stable and the notch groove will be accurate. (3) cannot be formed.
【０００９】又、切欠溝(３)とネジ山(２)の交叉部に於
て、溝の両側の山壁端面の内、ネジの進行側の端面は溝
底に対して略垂直の縦壁面(21)となっており、他方の端
面はネジの進行方向に対して逃げる方向に傾斜した傾斜
面(22)となっているため、ネジの締付け方向回転には抵
抗が少ないのでタッピング作業性が良く、ネジの緩み方
向には抵抗が大きいので、緩み止め効果を得ることがで
きる。At the intersection of the notch groove (3) and the screw thread (2), the end surface on the advancing side of the screw among the end surfaces of the mountain wall on both sides of the groove is a vertical wall surface substantially perpendicular to the groove bottom. (21) and the other end face is an inclined surface (22) that is inclined in the direction away from the traveling direction of the screw, so there is little resistance to rotation in the tightening direction of the screw, so tapping workability is improved. Since the resistance is great in the loosening direction of the screw, the loosening prevention effect can be obtained.
【００１０】ネジ軸(１)の先端を相手部材の下孔に食込
ませる際、ネジ軸(１)の先端が下孔の周辺に当っても、
該先端は丸く形成されているため、下孔周辺を傷付ける
ことはない。When the tip of the screw shaft (1) bites into the pilot hole of the mating member, even if the tip of the screw shaft (1) hits the periphery of the pilot hole,
Since the tip is rounded, it does not damage the periphery of the pilot hole.
【００１１】更に、切欠溝(３)はネジ軸(１)の先端側に
形成されているため、切欠溝(３)の存在によってネジ軸
の強度を低下させることはない。Further, since the notch groove (3) is formed on the tip side of the screw shaft (1), the strength of the screw shaft is not lowered by the existence of the notch groove (3).
【００１２】[0012]
【実施例】ネジ軸(１)の先端側が円錐状に縮径し、先端
部が丸く形成されている。ネジ山(２)の先端側に対して
周方向に等間隔に３本の切欠溝(３)が夫々複数の螺旋条
(20)(20)(20)に跨がって形成される。EXAMPLE The tip end side of the screw shaft (1) is conically reduced in diameter, and the tip end portion is formed round. Three notched grooves (3) are provided at equal intervals in the circumferential direction with respect to the tip side of the screw thread (2), and each of them has a plurality of spiral threads.
(20) (20) It is formed across (20).
【００１３】切欠溝(３)はネジ山の傾きに対して直角に
近づく方向に且つネジ軸(１)の軸芯に対して約１５゜傾
き、切欠溝(３)とネジ山(２)の交叉部に於て、溝の両側
の山壁端面の内、ネジの進行側の端面は溝底に対して略
垂直の縦壁面(21)となっており、他方の端面はネジの進
行方向に対して逃げ方向に傾斜した傾斜面(22)となって
いる。The notch groove (3) is inclined in a direction approaching a right angle to the inclination of the screw thread and at an angle of about 15 ° with respect to the axis of the screw shaft (1), and the notch groove (3) and the screw thread (2) are inclined. At the crossing part, of the end faces of the mountain wall on both sides of the groove, the end face on the advancing side of the screw is a vertical wall surface (21) that is substantially perpendicular to the groove bottom, and the other end face is in the advancing direction of the screw. On the other hand, it is an inclined surface (22) inclined in the escape direction.
【００１４】上記切欠溝(３)は、図３に示す如く、ネジ
転造平ダイス(４)に切欠形成用の補助ダイス(５)を組み
込んで、ネジ転造と同時に切欠溝(３)を転造によって形
成する。As shown in FIG. 3, the notch groove (3) is formed by incorporating a notch forming auxiliary die (5) into a thread rolling flat die (4) so that the notch groove (3) is formed at the same time when the thread is rolled. Formed by rolling.
【００１５】然して、３本の切欠溝(３)はネジ軸(１)の
周方向に等間隔に開設されているため、ネジ込みの開始
時は、ネジ軸は常に下孔の孔縁に３点接触するため、安
定してねじ込むことが出来る。However, since the three notched grooves (3) are formed at equal intervals in the circumferential direction of the screw shaft (1), the screw shaft is always set at the edge of the pilot hole at the beginning of screwing. Since it makes point contact, it can be screwed in stably.
【００１６】切欠溝(３)は軸芯に対して、１５゜傾いて
いるため、切欠溝(３)を転造ダイスで成形する際、ダイ
スの移動に追従して安定して軸部が回転し、精度よく切
欠溝(３)が形成できる。Since the notch groove (3) is inclined by 15 ° with respect to the shaft center, when the notch groove (3) is formed by a rolling die, the shaft portion stably rotates following the movement of the die. However, the notch groove (3) can be accurately formed.
【００１７】尚、切欠溝(３)の軸心に対する傾きは、１
５゜程度が望ましいが１０〜２０゜の範囲であれば可
い。The inclination of the notch groove (3) with respect to the axis is 1
About 5 ° is desirable, but it may be in the range of 10-20 °.
【００１８】切欠溝(３)の軸芯に対する傾きが、１０゜
以下であると、図５Ａに示す如く、切欠溝を形成するた
めの補助ダイス()の突条(51)の略全長が同時に軸部に掛
るため、大きな加圧力を必要とし、又、切欠溝(３)が軸
心に対して２０゜以上傾いていれば、溝を形成するため
の補助転造ダイス(５)の突条(51)が軸部(２)に対して点
当りとなり、軸部が安定せず精度よくネジ転造及び切欠
溝の転造成形が出来ない。When the inclination of the notch groove (3) with respect to the shaft center is 10 ° or less, as shown in FIG. 5A, substantially the entire lengths of the protrusions (51) of the auxiliary die () for forming the notch groove are at the same time. Since it is applied to the shaft portion, a large pressure is required, and if the notch groove (3) is inclined by 20 ° or more with respect to the shaft center, the ridge of the auxiliary rolling die (5) for forming the groove is formed. (51) comes into point contact with the shaft portion (2), so the shaft portion is not stable and it is not possible to perform thread rolling or notch groove rolling with high precision.
【００１９】又、切欠溝(３)と角ネジ山(２)の交叉部に
於て、溝の両側の山壁端面(21)(22)の内、ネジの進行側
の縦壁面(21)は溝底に対して略垂直であり、他方の端面
はネジの進行方向に対して逃げる方向に傾斜した傾斜面
(22)となっているため、ネジの締付け方向回転には抵抗
が少ないのでタッピング作業性が良く、ネジの緩み方向
には抵抗が大きいので、緩み止め効果を得ることができ
る。At the intersection of the notch groove (3) and the square screw thread (2), the vertical wall surface (21) on the screw advancing side among the mountain wall end surfaces (21) (22) on both sides of the groove. Is almost perpendicular to the groove bottom, and the other end surface is an inclined surface that is inclined in the escape direction with respect to the traveling direction of the screw.
Since (22), there is little resistance to rotation in the screw tightening direction, tapping workability is good, and resistance is large in the screw loosening direction, so a loosening prevention effect can be obtained.
【００２０】ネジ軸(１)の先端を相手部材の下孔に食込
ませる際、ネジ軸の先端が下孔の周辺に当っても、該先
端は丸く形成されているので、下孔周辺を傷付けること
ない。When the tip of the screw shaft (1) is bite into the pilot hole of the mating member, even if the tip of the screw shaft hits the periphery of the pilot hole, the tip is rounded, so Not hurt.
【００２１】本考案は、上記実施例の構成に限定される
ことはなく、実用新案登録請求の範囲に記載の範囲で種
々の変形が可能である。The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims for utility model registration.
【図１】ネジの正面図である。FIG. 1 is a front view of a screw.
【図２】ネジの底面図である。FIG. 2 is a bottom view of a screw.
【図３】ネジ及び切欠溝の転造の説明図である。FIG. 3 is an explanatory view of rolling a screw and a notch groove.
(１) ネジ軸 (２) ネジ山 (20) 螺旋条 (３) 切欠溝 (1) Screw shaft (2) Thread (20) Spiral thread (3) Notch groove
Claims (1)
たネジ軸(１)の先端側のネジ山(２)に対し、周方向に等
間隔に３本の切欠溝(３)が夫々隣り合う複数の螺旋条(2
0)(20)(20)に跨がって開設され、切欠溝(３)はネジ山の
傾きに対して直角に近づく方向に且つネジ軸(１)の軸芯
に対して１０〜２０゜傾き、切欠溝(３)とネジ山(２)の
交叉部に於て、溝の両側の山壁端面の内、ネジの進行側
の端面は溝底に対して略垂直の縦壁面(21)となってお
り、他方の端面はネジの進行方向に対して逃げ方向に傾
斜した傾斜面(22)となっているネジ。1. A notched thread (2) on the tip side of a screw shaft (1) having a reduced diameter on the tip side and a rounded tip has three notch grooves (3) at equal intervals in the circumferential direction. Multiple adjacent spiral lines (2
It is opened across 0) (20) (20), and the notch groove (3) is in a direction approaching a right angle to the inclination of the screw thread and 10 to 20 ° with respect to the axis of the screw shaft (1). At the intersection of the inclination, the notch groove (3) and the screw thread (2), the end surface on the advancing side of the screw among the end surfaces on both sides of the groove is a vertical wall surface (21) which is substantially perpendicular to the groove bottom. And the other end face is an inclined surface (22) that is inclined in the escape direction with respect to the traveling direction of the screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1070192U JPH0752969Y2 (en) | 1992-03-04 | 1992-03-04 | Tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1070192U JPH0752969Y2 (en) | 1992-03-04 | 1992-03-04 | Tapping screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0738724U JPH0738724U (en) | 1995-07-14 |
| JPH0752969Y2 true JPH0752969Y2 (en) | 1995-12-06 |
Family
ID=11757603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1070192U Expired - Lifetime JPH0752969Y2 (en) | 1992-03-04 | 1992-03-04 | Tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0752969Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010028824A1 (en) * | 2010-05-10 | 2011-11-10 | Hilti Aktiengesellschaft | Thread cutting concrete screw |
| JP2013068271A (en) * | 2011-09-22 | 2013-04-18 | Nichiha Corp | Building component mounting screw and building component mounting structure |
| JP6209363B2 (en) * | 2013-05-27 | 2017-10-04 | 株式会社小糸製作所 | Automotive parts |
| JP6177838B2 (en) * | 2015-07-17 | 2017-08-09 | 甫商有限公司 | screw |
-
1992
- 1992-03-04 JP JP1070192U patent/JPH0752969Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0738724U (en) | 1995-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960611 |