JP2001124039A - Multiple thread tapping screw - Google Patents
Multiple thread tapping screwInfo
- Publication number
- JP2001124039A JP2001124039A JP30530199A JP30530199A JP2001124039A JP 2001124039 A JP2001124039 A JP 2001124039A JP 30530199 A JP30530199 A JP 30530199A JP 30530199 A JP30530199 A JP 30530199A JP 2001124039 A JP2001124039 A JP 2001124039A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- circular
- tapping screw
- threads
- screw
- 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
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- Connection Of Plates (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、ねじ部を多条ねじ
山に形成した多条タッピンねじに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-threaded tapping screw having a thread portion formed into a multi-thread thread.
【0002】[0002]
【従来の技術】従来のセルフタッピンねじとして、図3
に示すように、ねじ山1の輪郭形状がほぼ等辺三角形状
で各側辺2が弓形をなし、二側辺2,2の交叉点に3つ
の突起部3を有する非円形に形成され、前記3つの突起
部3で雌ねじ4を成形するようにした非円形ねじ山のタ
ッピンねじが広く使用されている。2. Description of the Related Art As a conventional self-tapping screw, FIG.
As shown in FIG. 5, the contour of the thread 1 is substantially equilateral triangular, each side 2 has an arc shape, and is formed in a non-circular shape having three protrusions 3 at the intersection of the two sides 2. A non-circular thread tapping screw in which a female screw 4 is formed by three projections 3 is widely used.
【0003】[0003]
【発明が解決しようとする課題】上記従来のタッピンね
じは、ねじ込み抵抗が小さく、締結作業が能率良く行な
えるという大きな利点を有しているが、成形された雌ね
じ4と非円形ねじ山1との接触面積5が小さいため、締
付け破断トルク及び保持軸力が低いという欠点がある。
加えて、非円形ねじ山1が1条であるため、図4(a)
及び(b)に示すように、被締結部材である金属薄板6
に設けた下穴7にねじ込んで雌ねじを成形する際、ねじ
喰付きが不安定で、図示のように軸芯が傾斜して喰付き
不良が発生し易く、特に薄板に締結する場合には、喰付
き不良によって下穴7がばか孔になり易いので、締結作
業時に正確なトルクコントロールが要求される。このた
め、電動式トルクコントロール付きの締付け工具を使用
している。しかし、薄板の場合には、トルクコントロー
ル付きの締付け工具を使用しても、ばか孔を生じさせる
ので、締結速度を落すなど使用条件に制約がある。した
がって、従来の非円形ねじ山のタッピンねじは、厚み約
0.6mm程度の薄板が安定して締結できる限度であっ
た。The above-mentioned conventional tapping screw has a great advantage in that the screwing resistance is small and the fastening operation can be performed efficiently, but the formed female screw 4 and the non-circular thread 1 have a great advantage. The contact area 5 is small, so that there is a disadvantage that the tightening breaking torque and the holding axial force are low.
In addition, since the non-circular thread 1 has one thread, FIG.
And (b), the metal sheet 6 which is the member to be fastened.
When the female screw is formed by screwing into the prepared hole 7 provided in the hole, the screwing is unstable, the shaft core is inclined as shown in the drawing, and the biting is likely to occur, especially when fastening to a thin plate, Since the pilot hole 7 tends to be a fool hole due to poor biting, accurate torque control is required during the fastening operation. For this reason, a tightening tool with an electric torque control is used. However, in the case of a thin plate, even if a tightening tool with a torque control is used, an idiot is formed, so that there are restrictions on use conditions such as a reduction in a fastening speed. Therefore, the conventional non-circular thread tapping screw has a limit at which a thin plate having a thickness of about 0.6 mm can be stably fastened.
【0004】一方、家電製品等においては、使用する鋼
板材をより薄くすることで製品のトータルコストの削減
を図る傾向にある。On the other hand, in the case of home electric appliances and the like, there is a tendency to reduce the total cost of the products by using thinner steel plates.
【0005】本発明は、上記のような事情に鑑みてなさ
れたものであり、従来の非円形ねじ山を持ったタッピン
ねじの利点を活かしながら、雌ねじ成形時のねじ喰付き
が安定し、しかも成形された雌ねじとの接触面積が大き
く、締付け破断トルク及び保持軸力を増大させることが
でき、非常に薄い鋼板に対しても安定した締結が行なえ
る多条タッピンねじを提供することを目的としている。[0005] The present invention has been made in view of the above-described circumstances, and while taking advantage of the conventional tapping screw having a non-circular thread, the threading at the time of forming an internal thread is stable, and The object of the present invention is to provide a multi-threaded tapping screw which has a large contact area with a formed female screw, can increase a tightening breaking torque and a holding axial force, and can perform a stable fastening even on an extremely thin steel plate. I have.
【0006】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、締結に供する本体ねじ部の一端に回転工
具の係合部を設けた頭部を有し、他端に雌ねじを成形す
る先細りの進入端ねじ部を有するタッピンねじであっ
て、前記進入端ねじ部が、非円形多条ねじ山に形成さ
れ、前記本体ねじ部が、前記非円形多条ねじ山に連続す
る円形平行多条ねじ山に形成されていることを特徴とす
る。In order to achieve the above-mentioned object, the present invention has a head provided with an engaging portion of a rotary tool at one end of a main body screw portion for fastening, and a female screw at the other end. A tapping screw having a tapered entry end thread portion to be formed, wherein the entry end thread portion is formed as a non-circular multi-start thread, and wherein the main body thread portion is continuous with the non-circular multi-start thread. It is characterized by being formed in a parallel multi-thread thread.
【0007】前記進入端ねじ部が、非円形テーパ多条ね
じ山と、該非円形テーパ多条ねじ山に連続し、かつ、前
記円形平行多条ねじ山の外径とほぼ同一の回転直径を有
している非円形多条ねじ山とから構成されていることが
好ましい。The entry end thread portion has a non-circular tapered multi-threaded thread, a continuous diameter of the non-circular tapered multi-threaded thread, and a rotation diameter substantially equal to the outer diameter of the circular parallel multi-threaded thread. And a non-circular multi-thread thread.
【0008】本発明の多条タッピンねじは、進入端ねじ
部を含むねじ山全体が多条ねじ山に形成されているの
で、下穴に対して2以上のねじ山が喰い付いて安定した
喰付きが得られ、下穴にばか孔を生じさせることがな
い。しかも、進入端ねじ部が非円形ねじ山に形成されて
いるので、小さなねじ込み抵抗で効率良く雌ねじを成形
することができる。さらに、成形された雌ねじに螺合し
て締結に供せられる本体ねじ部は通常のねじ山、すなわ
ち円形平行ねじ山に形成されいてるので、前記雌ねじと
の接触面積が大きく、従来の非円形ねじ山のタッピンね
じに比べて大きな締付け破断トルク及び保持軸力が得ら
れる。したがって、本発明の多条タッピンねじは、厚み
が0.6mm以下の金属薄板に対しても安定した締結が行
なえ、使用分野の拡大が期待できるものである。In the multi-thread tapping screw of the present invention, since the entire thread including the entry end thread portion is formed as a multi-thread thread, two or more threads bite into the prepared hole so that a stable bite is formed. Adhesion is obtained, and no pit is formed in the pilot hole. Moreover, since the entry end thread portion is formed in a non-circular thread, the female screw can be efficiently formed with a small screwing resistance. Further, since the main body thread portion screwed to the formed female screw and provided for fastening is formed as a normal thread, that is, a circular parallel thread, the contact area with the female screw is large, and the conventional non-circular screw is used. Higher tightening breaking torque and holding axial force can be obtained as compared with a mountain tapping screw. Therefore, the multi-thread tapping screw of the present invention can perform stable fastening even to a thin metal plate having a thickness of 0.6 mm or less, and can be expected to expand the field of use.
【0009】[0009]
【発明の実施の形態】以下、本発明の好適な実施の形態
を図面に基づいて説明する。図1は、本発明による多条
タッピンねじを示す正面図であり、図2は、本発明によ
る多条タッピンねじのねじ喰付き状態を示す説明図であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a multiple tapping screw according to the present invention, and FIG. 2 is an explanatory diagram showing a threaded state of the multiple tapping screw according to the present invention.
【0010】本発明の多条タッピンねじ10は、締結に
供する本体ねじ部11の一端に回転工具の係合部13を
設けた頭部12を有し、他端に雌ねじを成形する先細り
の進入端ねじ部14を有している構成は従来のタッピン
ねじと同じであるが、本体ねじ部11から進入端ねじ部
14までねじ山全体が多条ねじ(図示の実施例では2条
ねじ)に形成されている。そして、本体ねじ部11が全
域に亘って通常のねじ山と同様の円形平行多条ねじ山1
1aに形成されているのに対して、進入端ねじ部14は
全域に亘って図3に示した非円形ねじ山1と同じ形状の
非円形多条ねじ山14a及び14bに形成されている。
進入端ねじ部14は、先端側の非円形テーパ多条ねじ山
14aと、該非円形テーパ多条ねじ山14aに連続し、
かつ、本体ねじ部11の円形平行多条ねじ山11aの外
径とほぼ同一の回転直径を有する非円形多条ねじ山14
bとからなり、該非円形多条ねじ山14bが円形平行多
条ねじ山11aに連続している。このような構成とする
ことにより、テーパ多条ねじ山14aにより部分的に成
形される雌ねじが非円形多条ねじ山14bにより完全な
雌ねじに成形されるので、成形された雌ねじに対して本
体ねじ部11の円形平行多条ねじ山11aがきわめてス
ムーズにねじ込まれる。The multi-thread tapping screw 10 of the present invention has a head portion 12 provided with an engaging portion 13 of a rotary tool at one end of a main body screw portion 11 for fastening, and a tapered entry for forming a female screw at the other end. The configuration having the end screw portion 14 is the same as the conventional tapping screw, but the entire thread from the main body screw portion 11 to the entry end screw portion 14 is a multi-thread screw (two-thread screw in the illustrated embodiment). Is formed. Then, the main body screw portion 11 has a circular parallel multi-start thread 1 similar to a normal thread over the entire area.
On the other hand, the entry end threaded portion 14 is formed over the entire area by non-circular multi-threaded threads 14a and 14b having the same shape as the non-circular thread 1 shown in FIG.
The entry end screw portion 14 is continuous with the non-circular tapered multi-thread thread 14a on the distal end side and the non-circular tapered multi-thread thread 14a,
And a non-circular multi-start thread 14 having a rotation diameter substantially equal to the outer diameter of the circular parallel multi-start thread 11a of the main body thread portion 11.
b, and the non-circular multi-start thread 14b is continuous with the circular parallel multi-start thread 11a. With such a configuration, the internal thread partially formed by the tapered multi-threaded thread 14a is formed into a complete internal thread by the non-circular multi-threaded thread 14b. The circular parallel multi-threaded thread 11a of the portion 11 is screwed very smoothly.
【0011】一方、図2に示すように非円形テーパ多条
ねじ14aとこれに続く非円形多条ねじ山14bを被締
結部材である金属薄板6の下穴7にねじ込んで雌ねじを
成形する際、下穴7に対して2以上のねじ山14a及び
14bが喰い付くので、安定した喰付きが得られ、下穴
7にばか孔を発生させることはない。また、非円形ねじ
山に形成されたテーパ多条ねじ山14aとこれに続く非
円形多条ねじ山14bによって、小さなねじ込み抵抗で
効率良く雌ねじが成形される。そして、成形された雌ね
じに本体ねじ11の円形平行ねじ山11aが螺合する
と、ねじ山11aが通常のねじ山であるから、雌ねじと
の接触面積が大きく、従来の非円形ねじ山のタッピンね
じと比べて大きな締付け破断トルク及び保持軸力が得ら
れる。したがって、本発明による多条タッピンねじ10
は、従来のタッピンねじの使用限度とされていた厚みが
0.6mm以下の薄板鋼材に対しても安定した締結が行な
え、電化製品のように構成材料の鋼板を薄くすることで
製品のトータルコストの削減が図れる産業分野への使用
が大幅に拡大する。On the other hand, as shown in FIG. 2, when a non-circular tapered multi-thread screw 14a and a non-circular multi-thread screw 14b following this are screwed into the prepared hole 7 of the thin metal plate 6 to be fastened, a female screw is formed. Since two or more screw threads 14a and 14b bite into the prepared hole 7, stable biting is obtained, and no pitted holes are generated in the prepared hole 7. Further, the female thread is efficiently formed with a small screwing resistance by the tapered multi-thread thread 14a formed in the non-circular thread and the non-circular multi-thread thread 14b following the tapered multi-thread thread 14b. Then, when the circular parallel thread 11a of the main body screw 11 is screwed into the formed female screw, the thread 11a is a normal thread, so that the contact area with the female screw is large, and the conventional non-circular thread tapping screw is used. Larger tightening breaking torque and holding axial force can be obtained. Therefore, the multi-starting screw 10 according to the present invention
Can stably connect thin steel sheets with a thickness of 0.6 mm or less, which has been the limit for the use of conventional tapping screws. The use in industrial fields, where reductions in emissions can be achieved, will be greatly expanded.
【0012】[0012]
【発明の効果】以上説明したように、本発明の多条タッ
ピンねじは、被締結部材に対する雌ねじ成形時のねじ喰
付きが安定し、しかも、成形された雌ねじと、締結に供
する本体ねじ部との接触面積が大きく、大きな締付け破
断トルク及び保持軸力が得られる。したがって、厚みの
非常に薄い鋼板に対しても安定した締結が行なえ、使用
分野が大幅に拡大される。As described above, according to the multi-thread tapping screw of the present invention, the biting of the internal thread with respect to the member to be fastened when forming the internal thread is stable, and the formed internal thread and the main body thread portion used for fastening are formed. Has a large contact area, and a large tightening breaking torque and holding axial force can be obtained. Therefore, stable fastening can be performed even on a very thin steel plate, and the field of use is greatly expanded.
【図1】本発明による多条タッピンねじを示す正面図で
ある。FIG. 1 is a front view showing a multiple tapping screw according to the present invention.
【図2】本発明による多条タッピンねじのねじ喰付き状
態を示す説明図である。FIG. 2 is an explanatory view showing a threaded state of a multi-threaded tapping screw according to the present invention.
【図3】非円形ねじ山のタッピンねじの要部断面図であ
る。FIG. 3 is a sectional view of a main part of a tapping screw having a non-circular thread.
【図4】従来のタッピンねじのねじ喰付き状態を示す説
明図である。FIG. 4 is an explanatory view showing a threaded state of a conventional tapping screw.
1 非円形ねじ山 6 金属薄板 7 下穴 10 多条タッピンねじ 11 本体ねじ部 11a 円形平行ねじ山 12 頭部 13 係合部 14 進入端ねじ部 14a 非円形テーパ多条ねじ山 14b 非円形多条ねじ山 DESCRIPTION OF SYMBOLS 1 Non-circular thread 6 Metal thin plate 7 Prepared hole 10 Multi-threaded tapping screw 11 Body thread part 11a Circular parallel thread 12 Head 13 Engaging part 14 Entry end thread part 14a Non-circular tapered multi-thread thread 14b Non-circular multi-thread Thread
Claims (2)
具の係合部を設けた頭部を有し、他端に雌ねじを成形す
る先細りの進入端ねじ部を有するタッピンねじであっ
て、 前記進入端ねじ部が、非円形多条ねじ山に形成され、 前記本体ねじ部が、前記非円形多条ねじ山に連続する円
形平行多条ねじ山に形成されていることを特徴とする多
条タッピンねじ。1. A tapping screw having a head portion provided with an engaging portion of a rotary tool at one end of a main body screw portion provided for fastening, and a tapered entry end screw portion forming a female screw at the other end, The entry end thread portion is formed in a non-circular multi-thread thread, and the main body thread portion is formed in a circular parallel multi-thread thread continuous with the non-circular multi-thread thread. Threaded tapping screw.
ねじ山と、該非円形テーパ多条ねじ山に連続し、かつ、
前記円形平行多条ねじ山の外径とほぼ同一の回転直径を
有している非円形多条ねじ山とから構成されている請求
項1記載の多条タッピンねじ。2. The non-circular taper multi-thread thread, wherein the entry end thread portion is continuous with the non-circular taper multi-thread thread, and
The multi-thread tapping screw according to claim 1, comprising a non-circular multi-thread having substantially the same rotation diameter as an outer diameter of the circular parallel multi-thread.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30530199A JP2001124039A (en) | 1999-10-27 | 1999-10-27 | Multiple thread tapping screw |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30530199A JP2001124039A (en) | 1999-10-27 | 1999-10-27 | Multiple thread tapping screw |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2001124039A true JP2001124039A (en) | 2001-05-08 |
Family
ID=17943463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30530199A Pending JP2001124039A (en) | 1999-10-27 | 1999-10-27 | Multiple thread tapping screw |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2001124039A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014534390A (en) * | 2011-10-13 | 2014-12-18 | ウーイーペー ゲーエムベーハー ウント コー.カーゲー | Fixing device including screw having dual function |
US20220102117A1 (en) * | 2020-09-25 | 2022-03-31 | Applied Materials, Inc. | Thread profiles for semiconductor process chamber components |
-
1999
- 1999-10-27 JP JP30530199A patent/JP2001124039A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014534390A (en) * | 2011-10-13 | 2014-12-18 | ウーイーペー ゲーエムベーハー ウント コー.カーゲー | Fixing device including screw having dual function |
US20220102117A1 (en) * | 2020-09-25 | 2022-03-31 | Applied Materials, Inc. | Thread profiles for semiconductor process chamber components |
WO2022066942A1 (en) * | 2020-09-25 | 2022-03-31 | Applied Materials, Inc. | Improved thread profiles for semiconductor process chamber components |
US12068137B2 (en) | 2020-09-25 | 2024-08-20 | Applied Materials, Inc. | Thread profiles for semiconductor process chamber components |
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