JPS6131207Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は、ねじそのものが相手材の下穴に雌ね
じを成形しつつ螺着することのできる。いわゆる
セルフタツピンねじに関する。[Detailed Description of the Invention] In the present invention, the screw itself can be screwed into the prepared hole of the mating member while forming a female thread. This relates to so-called self-tattu pin screws.

セルフタツピンねじは相手材の下穴にねじ自身
でタツプを立てながら螺入し、そのまま相手材を
締付けることができるので、小ねじに比べてその
操作性は非常に高く、ねじ締結コスト低減に大き
く寄与している。一方、このセルフタツピンねじ
のねじ込み時、すなわち組立作業中に雌ねじを成
形するので、これに従事する組立作業者、特に女
子作業者の疲労が大きく、職業病の原因となつて
いる。従つて、相手材の下穴に雌ねじを加工し、
成形するに要するトルク（以下ねじ込みトルクと
称す）の低減の要請は非常に大きなものがあつ
た。 Self-tap pin screws can be screwed into the pilot hole of the mating material while making a tap on their own, and the mating material can be tightened as is.Compared to machine screws, the self-tap pin screws are much easier to operate than small screws, and contribute greatly to reducing screw tightening costs. are doing. On the other hand, since the female thread is formed during screwing of the self-tap pin screw, that is, during assembly work, assembly workers, especially female workers, who engage in this work are highly fatigued, which is a cause of occupational diseases. Therefore, we machined a female thread into the pilot hole of the mating material,
There has been a great demand for reducing the torque required for molding (hereinafter referred to as screw-in torque).

この要請にこたえるために多数の提案がなされ
たが、その殆どは第４図及び第５図に示す昭和37
年特許出願公告第4608号で代表されるねじ部断面
形状に対する提案である。第４図に示す本提案の
自己雌ねじ切り用ねじ１１によれば、ねじ山７は
ねじ山７成形部分中に３個の突起１２を有し、か
つ、これ等の突起１２は120゜離れて隔たつてい
る。更に第５図において、柄１３の形状は、ねじ
軸心１４と相隣る２個の弓形面が係合する点１２
ａとを結ぶ半径１５上に中心１６を有する弓形辺
１７からなり、しかも前記弓形辺１７を有する等
辺三角形に近いものに構成されている。 A number of proposals were made to meet this request, most of which are shown in Figures 4 and 5.
This is a proposal for the cross-sectional shape of the threaded portion as typified by Patent Application Publication No. 4608. According to the proposed self-threading screw 11 shown in FIG. 4, the thread 7 has three projections 12 in the thread 7 forming part, and these projections 12 are spaced apart by 120°. Separated. Furthermore, in FIG. 5, the shape of the handle 13 has a point 12 where two adjacent arcuate surfaces engage with the screw axis 14.
It is composed of an arcuate side 17 having a center 16 on a radius 15 connecting the arcuate side 17 with the arcuate side 17, and is configured to be close to an equilateral triangle having the arcuate side 17.

上記自己雌ねじ切り用ねじを使用することによ
り、ねじ込みトルクが実質的に減少し、それなり
の効果があつた。しかし、この効果だけでは近年
の組立作業における生産性向上に対応するために
は充分とはいえなかつた。このような状況にもか
かわらず、タツピンねじの需要はますます増大し
ている。この結果、ねじ込みトルクの低減の要請
は更に大きなものを求めてきているのである。 By using the self-threading screw described above, the screwing torque was substantially reduced, and there was a certain effect. However, this effect alone was not sufficient to meet the recent improvements in productivity in assembly work. Despite this situation, the demand for tuft pin screws continues to increase. As a result, there is a growing demand for even greater reductions in screwing torque.

本考案は、これ等の社会的要請にこたえるため
になされたもので、以下実施例を図面に基づいて
説明する。 The present invention was devised in response to these social demands, and embodiments will be described below based on the drawings.

第１図、第２図及び第３図において、１はタツ
ピンねじであり、駆動機構２を有する頭部３とね
じ部４とからなつている。前記ねじ部４をねじ山
７の外径寸法からみると、ねじ部４は首下から伸
びるストレート部５とテーパ部６とからなつてい
る。そして、前記ストレート部５はねじ山７の外
径寸法が実質的に等しく、前記テーパ部６はねじ
部先端８に行くに従い外径寸法が小さくなつてい
る。 In FIGS. 1, 2, and 3, reference numeral 1 denotes a tuft pin screw, which is composed of a head 3 having a drive mechanism 2 and a threaded portion 4. As shown in FIG. Looking at the threaded portion 4 from the outer diameter dimension of the thread 7, the threaded portion 4 consists of a straight portion 5 extending from below the neck and a tapered portion 6. In the straight part 5, the outer diameter of the thread 7 is substantially equal, and in the tapered part 6, the outer diameter becomes smaller toward the tip 8 of the thread.

また、前記ねじ部４をねじ山７のねじ山角度か
らみると、ねじ部４はねじ部先端８から領域Ａ、
領域Ｂ及び領域Ｃが設けられ、更に前記領域Ａ，
Ｂ間に第１移行部１０と前記領域Ｂ，Ｃ間に第２
移行部９とが設けられている。 Further, when the threaded portion 4 is viewed from the thread angle of the threaded thread 7, the threaded portion 4 extends from the threaded portion tip 8 to the area A,
A region B and a region C are provided, and the region A,
A first transition part 10 between areas B and a second transition part 10 between areas B and C.
A transition section 9 is provided.

そして前記領域Ａは30゜のねじ山角度ｅを有す
るねじ山７ｅからなつており、前記領域Ｂは45゜
のねじ山角度ｃを有するねじ山７ｃからなつてお
り、前記領域Ｃは60゜のねじ山角度ａを有するね
じ山７ａからなつている。更に、前記第１移行部
１０は30゜と45゜の複合角度ｄを有するねじ山７
ｄからなつている。かつ、第１移行部１０は30゜
の角度を有するねじ山７ｄの谷底に45゜の角度を
有するねじ山７ｄの谷底が重なり始め、以後連続
的に45゜の角度を有するねじ山７ｄ部分が増加し
て、45゜のねじ山角度ｃを有するねじ山７ｃの領
域Ｂに移行するように構成されている。前記第２
移行部９は45゜と60゜の複合角度ｂを有するねじ
山７ｂからなつている。かつ、第２移行部９は、
45゜の角度を有するねじ山７ｂの谷底に60゜の角
度を有するねじ山７ｂの谷底が重なり始め、以後
連続的に60゜の角度を有するねじ山７ｂ部分が増
加して、60゜のねじ山角度ａを有するねじ山７ａ
の領域Ｃに移行するように構成されている。 The area A consists of a thread 7e with a thread angle e of 30°, the area B consists of a thread 7c with a thread angle c of 45°, and the area C consists of a thread 7c with a thread angle c of 60°. It consists of a thread 7a having a thread angle a. Furthermore, the first transition part 10 has a thread 7 having a compound angle d of 30° and 45°.
It starts from d. In addition, in the first transition part 10, the root of the thread 7d having an angle of 30° begins to overlap the root of the thread 7d having an angle of 45°, and thereafter, the portion of the thread 7d having an angle of 45° continues. It is configured to increase and pass into region B of the thread 7c with a thread angle c of 45°. Said second
The transition 9 consists of a thread 7b with a compound angle b of 45° and 60°. And, the second transition part 9 is
The root of the thread 7b having an angle of 60° begins to overlap the root of the thread 7b having an angle of 45°, and thereafter the portion of the thread 7b having an angle of 60° increases continuously to form a 60° thread. Thread 7a with thread angle a
It is configured to move to area C of .

上記のように構成したタツピンねじを使用する
場合、先ず、タツピンねじ１のねじ部先端８を相
手部材・板厚・ねじ径、・ねじ形状等によつて適
正に定められた径の下穴に置く。次にタツピンね
じ１に所定の工具により推力とねじ込みトルクと
を加えると、領域Ａの30゜のねじ山角度ｅを有す
るねじ山７ｅが相手材の下穴に食い込み雌ねじを
成形し始める。そして、最もねじ込みトルクの必
要とするテーパ部６が押し込まれる。その後、第
１移行部１０に達し、そこでは30゜の角度を有す
る雌ねじを谷側から徐々に45゜の角度を有するね
じ山７ｄが押し拡げるように押し込まれる。そし
て、領域Ｂの45゜のねじ山角度ｃを有するねじ山
７ｃがねじ込まれ、第２移行部９に達する。そこ
では45゜の角度を有する雌ねじを谷側から徐々に
60゜の角度を有するねじ山７ｂが押し拡げるよう
に押し込まれる。そして、領域Ｃの60゜のねじ山
角度ａを有するねじ山７ａが雌ねじにねじ込ま
れ、相手材と螺着する。 When using the tatsupin screw configured as described above, first insert the tip 8 of the threaded portion of the tatsupin screw 1 into a pilot hole with a diameter appropriately determined by the mating member, plate thickness, thread diameter, thread shape, etc. put. Next, when a thrust force and screwing torque are applied to the tuft pin screw 1 using a predetermined tool, the screw thread 7e having a thread angle e of 30 degrees in the area A bites into the pilot hole of the mating material and begins to form a female thread. Then, the tapered portion 6 that requires the most screwing torque is pushed in. Thereafter, the first transition part 10 is reached, where the female thread having an angle of 30 degrees is gradually pushed in from the root side so that the threads 7d having an angle of 45 degrees are pushed out. Then, the thread 7c having a thread angle c of 45° in region B is screwed in and reaches the second transition part 9. There, a female thread with a 45° angle is gradually inserted from the valley side.
The screw thread 7b having an angle of 60 degrees is pushed in so as to be expanded. Then, the thread 7a having a thread angle a of 60° in region C is screwed into the female thread and screwed into the mating material.

以上説明したように、本考案はタツピンねじの
ねじ部に複数個のねじ山角度を有するねじ山の領
域に設け、かつ、相隣る領域のねじ山をスムーズ
に連絡するように、その各領域の重なる部分に第
１移行部及び第２移行部を設け、その各移行部に
相隣る領域のねじ山角度からなる複合角度のねじ
山を成形しているため、各移行部では大きい角度
のねじ山で押し拡げる部分が少なく、ねじ込みト
ルクを軽減するなどの効果がある。また、本考案
は、相手材の袋穴に使用される場合でも、ねじ込
みトルクは急激に上昇することなく、ゆるやかに
上昇するので、組立作業者への負荷が大きく軽減
される効果がある。更に、ねじ込み初期のトルク
上昇率、すなわちねじ込みトルクとねじの回転角
との比ぐ低下するなどの効果もある。これ等の効
果は、従来、組立作業者に与えていた疲労を著し
く軽減し、職業病の原因を除去するものである。
しかも、このことは先の社会的要請に大きくこた
えるものである。 As explained above, the present invention provides a screw thread area having a plurality of thread angles in the threaded part of a tatsupin screw, and each area A first transition part and a second transition part are provided in the overlapping parts, and each transition part is formed with a thread with a compound angle consisting of the thread angles of the adjacent areas, so each transition part has a large angle. There are fewer parts that need to be expanded by the screw thread, which has the effect of reducing screwing torque. Further, even when the present invention is used in a blind hole in a mating material, the screwing torque does not increase rapidly but gradually increases, so the load on the assembly worker is greatly reduced. Furthermore, there is an effect that the torque increase rate at the initial stage of screwing, that is, the ratio of the screwing torque to the rotation angle of the screw is reduced. These effects significantly reduce the fatigue traditionally experienced by assembly workers and eliminate the causes of occupational diseases.
Moreover, this greatly responds to the social demands mentioned above.

また、本考案は相手材の雌ねじが常に押し拡げ
られるため、螺着時の雌ねじの弾力性が失なわれ
ず。雌ねじと雄ねじの摩擦力が高まり、耐ゆるみ
性能の向上を計ることができるなどの効果を発揮
する。更に、本考案は、ねじ込みトルクの低減が
ねじ込みに使用する工具類の耐久度の向上に寄与
するため、原価低減にも効果を発揮する。 In addition, with this invention, the female thread of the mating material is constantly pushed out, so the female thread does not lose its elasticity during screwing. This increases the frictional force between the female thread and the male thread, resulting in improved loosening resistance. Furthermore, the present invention is effective in reducing costs because the reduction in screwing torque contributes to improving the durability of tools used for screwing.

尚、本考案は、ねじ部に３領域を設定し、ねじ
山角度が３種である場合のみ説明されているが、
このねじ山角度の種類は２種でもあるいは４種以
上としても本考案の思想に含まれることは勿論で
ある。また、本考案は、従来例のセルフタツピン
ねじ、例えば非円形断面のタツピンねじのねじ山
に適用することで更に大きな効果を発揮する。 In addition, although the present invention is explained only when three areas are set in the threaded part and there are three types of thread angles,
Of course, the concept of the present invention includes two or more types of thread angles. Further, the present invention exhibits even greater effects when applied to the threads of conventional self-tap pin screws, for example, tut pin screws with non-circular cross sections.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の正面図、第２図は第１図の要
部切欠断面図、第３図は第２図のａ，ｂ，ｃ，
ｄ，ｅの拡大断面図、第４図は従来例の正面図、
第５図は第４図のねじ部形状の説明図でる。 １……タツピンねじ、２……駆動機構、３……
頭部、４……ねじ部、５……ストレート部、６…
…テーパ部、７，７ａ，７ｂ，７ｃ，７ｄ，７ｅ
……ねじ山、８……ねじ部先端、９……第２移行
部、１０……第１移行部、１１……自己雌ねじ切
り用ねじ山、１２……突起、１２ａ……弓形面が
係合する点、１３……柄、１４……ねじ軸心、１
５……半径、１６……中心、１７……弓形辺。 Fig. 1 is a front view of the present invention, Fig. 2 is a cutaway sectional view of the main part of Fig. 1, and Fig. 3 is a, b, c, and
d and e are enlarged sectional views, and Fig. 4 is a front view of the conventional example.
FIG. 5 is an explanatory diagram of the shape of the threaded portion in FIG. 4. 1... Tatsupin screw, 2... Drive mechanism, 3...
Head, 4...Threaded part, 5...Straight part, 6...
...Tapered portion, 7, 7a, 7b, 7c, 7d, 7e
... Thread, 8 ... Thread part tip, 9 ... Second transition part, 10 ... First transition part, 11 ... Thread for self-female thread cutting, 12 ... Protrusion, 12a ... Arcuate surface is engaged Matching point, 13...Handle, 14...Screw axis center, 1
5... Radius, 16... Center, 17... Arcuate side.

Claims (1)

【実用新案登録請求の範囲】 １ 駆動機構２を有する頭部３と、ストレート部
５及びテーパ部６を有するねじ部４とからなる
タツピンねじ１において、 ねじ部４にねじ山角度の異なるねじ山を有す
る複数個の領域と相隣る領域に連なる移行部を
設け、かつ、前記移行部に相隣る領域のねじ山
角度からなる複合角度を有するねじ山を設け、
前記ねじ山の小さい角度のねじ山の谷底に大き
い角度のねじ山の谷底が重なり始め、以後連続
的に大きい角度のねじ山部分が増加して、大き
いねじ山角度を有するねじ山の領域に移行する
ように構成したことを特徴とするタツピンね
じ。 ２ ねじ部４に小、中、大のねじ山角度を有する
ねじ山７でなる３種類の領域Ａ，Ｂ，Ｃを設
け、前記領域Ａ，Ｂ間に第１移行部１０と前記
領域Ｂ，Ｃ間に第２移行部９とを設けたことを
特徴とする実用新案登録請求の範囲第１項に記
載のタツピンねじ。[Claims for Utility Model Registration] 1. In a tatsupin screw 1 consisting of a head 3 having a drive mechanism 2 and a threaded part 4 having a straight part 5 and a tapered part 6, the threaded part 4 has threads with different thread angles. a transition part that is connected to a plurality of regions and adjacent regions, and a thread having a compound angle consisting of the thread angles of the adjacent regions is provided in the transition part,
The root of the screw thread with a large angle begins to overlap with the root of the screw thread with a small angle of the thread, and thereafter, the thread portion with a large angle continuously increases and shifts to a region of the screw thread with a large thread angle. A tatsu pin screw characterized in that it is configured to do so. 2. Three types of regions A, B, and C are provided in the threaded portion 4, each consisting of threads 7 having small, medium, and large thread angles, and between the regions A and B, a first transition portion 10 and the region B, The tuft pin screw according to claim 1, characterized in that a second transition portion 9 is provided between C.