JP2006090456A - Screw with driving hole - Google Patents

Screw with driving hole Download PDF

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JP2006090456A
JP2006090456A JP2004277688A JP2004277688A JP2006090456A JP 2006090456 A JP2006090456 A JP 2006090456A JP 2004277688 A JP2004277688 A JP 2004277688A JP 2004277688 A JP2004277688 A JP 2004277688A JP 2006090456 A JP2006090456 A JP 2006090456A
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screw
slope
engagement
gentle slope
driver bit
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Toshimasa Toyooka
利昌 豊岡
Shinichi Hamano
真一 濱野
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Nitto Seiko Co Ltd
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Nitto Seiko Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an engagement groove capable of surely fitted and engaged with an engagement blade of a driver bit and an engagement groove of a screw even when slight error is found. <P>SOLUTION: In this screw composed of a head part 2 having a driving hole 10 and a leg part 4 integrated with the head part 2 and having screw thread 3, a bottom face 13 of the engagement groove 11 of the driving hole 10 is composed of a linear steep slope 13a having steep slope at a central side of the screw 1, and a linear gentle slope 13b having gentle slope at an outer peripheral side, and the steep slope 13a and the gentle slope 13b are connected by an arc-shaped face 14, thus the steep slope and the gentle slope can be moved close to a ridge line of the engagement blade at all times without interfered by a corner part of the engagement blade of the driver bit, and a wide engagement area for transmitting driving force of the driver bit can be achieved. Further as stress is not concentrated on a punch in heading as the corner part does not exist on the punch used in heading the head part, a service life of the punch can be elongated, and a manufacturing cost can be reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、比較的小さいねじにおいて、このねじに駆動力が作用した時、頭部の駆動穴を破壊することなく且つ大きな駆動力の伝達を可能にするとともに、この駆動穴に作用するドライバビットの嵌合においてその嵌め合わせ融通性を得るようにした駆動穴付きねじに関する。   The present invention is a relatively small screw, and when a driving force is applied to the screw, it is possible to transmit a large driving force without destroying the driving hole of the head, and a driver bit that acts on the driving hole. The present invention relates to a screw with a drive hole in which fitting flexibility is obtained in the fitting.

一般に頭部とねじ山が形成された脚部とからなるねじは製品を組み立てたり、部品をワークに取り付けたりするのに、その締結部品としてあらゆる製品に使用されている。ところが最近多く使用されているねじは製品の最小化に対応して比較的小さいねじの要求がほとんどであり、例えば、図６に示すようなねじ１０１に用いられている通常の＋形状の駆動穴１１０ではこれの破損が発生しやすく、十分な締結力が得られていない。特に、このような形状の駆動穴１１０を頭部１０２の厚みが薄い、所謂、薄頭ねじに使用した場合は駆動穴１１０を比較的深くしてドライバビットの係合羽根とねじの係合溝１１１とが接するのに十分な係合面積を維持する必要があることから、駆動穴が必然的に深くなり、そのため、ねじの頭部と脚部との間の首部の肉厚が薄くなり、この間の強度が弱くなることもあった。   In general, a screw including a head and a leg portion on which a thread is formed is used as a fastening part in any product for assembling a product or attaching a part to a workpiece. However, most of the screws used recently are relatively small screws in response to minimization of the product. For example, a normal + -shaped drive hole used for the screw 101 as shown in FIG. In 110, this is easily damaged, and a sufficient fastening force is not obtained. In particular, when the drive hole 110 having such a shape is used for a so-called thin-head screw having a thin head portion 102, the drive hole 110 is made relatively deep so that the engagement blades of the driver bit and the engagement groove of the screw are formed. Since it is necessary to maintain a sufficient engagement area for contact with 111, the drive hole is inevitably deep, and therefore the thickness of the neck between the screw head and the leg is reduced, During this time, the strength sometimes weakened.

また、この強度の低下を解消するために、多く使用されているものに図７に示すような駆動穴を形成したものもある。この駆動穴は主に皿頭ねじに採用すべく開発されたものであり、これは石膏ボード、けい酸カルシウム板、プラスタボード等の壁、天井材を鋼製下地材に取り付けるのに適するタッピンねじ２０１に使用することを目的に開発されたものである（例えば、特許文献１参照）。ところがタッピンねじ以外のねじにおいても、このタッピンねじ２０１の駆動穴２１０の形状が多く採用されている。これは通常の駆動穴を構成する係合溝の底面を頭部端面側において、中心からの距離を長くするように頭部端面側の底面２１３を円弧形状にして係合溝２１１の係合壁の面積を増加させる必要からである。しかし、このような形状であっても、ねじが小さいと依然としてドライバビットからの駆動力の伝達が十分になされず、駆動穴に破損が生じやすい等の問題が残っている。これを解消するためにこの駆動穴の改良が種々行われており、最近では、頭部厚みの薄いねじに主として使用される形状として、駆動穴を構成する係合溝の底面をねじの中心側が傾斜のきつい急斜面で、頭部外周側が傾斜の緩い緩斜面形状としたものが開発され、これにより、係合溝は頭部の外周方向へ延び、ドライバビットとの係合面積が広くなるようにしたものもある。
特公平３−６３６５号公報 In addition, in order to eliminate this decrease in strength, there is a type in which a drive hole as shown in FIG. This drive hole was developed mainly for flat head screws, and it is a tapping screw suitable for mounting walls and ceiling materials such as gypsum board, calcium silicate board, plaster board, etc. to steel base material. It was developed for the purpose of using for 201 (for example, refer patent document 1). However, the shape of the drive hole 210 of the tapping screw 201 is often used for screws other than the tapping screw. This is because the bottom surface of the engagement groove constituting the normal drive hole is on the head end surface side, and the bottom surface 213 on the head end surface side is formed in an arc shape so as to increase the distance from the center. This is because it is necessary to increase the area. However, even with such a shape, if the screw is small, the driving force from the driver bit is still not sufficiently transmitted, and there still remains a problem that the driving hole is easily damaged. In order to solve this problem, various improvements have been made to the drive hole. Recently, as a shape mainly used for a screw having a thin head, the bottom surface of the engagement groove constituting the drive hole is arranged on the center side of the screw. A slope with a steep and steep slope with a gentle slope on the outer periphery of the head has been developed, so that the engagement groove extends in the direction of the outer periphery of the head and increases the engagement area with the driver bit. Some have done.
Japanese Patent Publication No. 3-6365

しかしながら、このような頭部端面側の係合溝を構成している底面に円弧形状を形成する場合、駆動溝を圧造成形で成形する際に、これにより得られた溝の深さをねじの寸法に応じて管理する必要があるが、底面が全て円弧形状であるため、簡単に測定することができなかった。また、係合壁の駆動面積も余り大きくすることができず、特に、呼び径の小さいねじにおいて、大きな駆動力が加わると、係合溝の破損が依然として生じる恐れがある。しかも、急斜面と緩斜面とを接続した係合溝の底面の場合、この接続部が角張っているので、この係合溝と相似形状のドライバビットの係合羽根を係合させた際に、互いの緩斜面が干渉して駆動穴に深く入らず、係合羽根が浮いた状態となり、このため、駆動力の伝達面積が少なくなっていた。更に、このねじの駆動穴を通常は圧造成形で得ているが、このように急斜面と緩斜面との接続箇所に角部があると、この駆動穴を成形するパンチの角に応力集中が生じて頭部圧造成形において、そのパンチの寿命は鉄製ねじの場合は通常の半分、ステンレス製ねじの場合は１／５程度となり、パンチの寿命が短くなっている等の諸々の課題を有している。   However, when an arc shape is formed on the bottom surface that constitutes the engaging groove on the head end surface side, when the drive groove is formed by forging, the depth of the groove obtained thereby is set to the screw Although it is necessary to manage according to the dimensions, it was not possible to easily measure because the bottom surface was entirely arc-shaped. In addition, the drive area of the engagement wall cannot be increased too much. In particular, when a large driving force is applied to a screw having a small nominal diameter, the engagement groove may still be broken. In addition, in the case of the bottom surface of the engagement groove connecting the steep slope and the gentle slope, the connection portion is angular, so that when the engagement blades of the driver bit having a similar shape to the engagement groove are engaged with each other, As a result of the interference of the gentle slope, the engaging blades do not enter deeply into the drive hole and the engagement blade floats, so that the transmission area of the driving force is reduced. Furthermore, the drive hole of this screw is usually obtained by forging. However, if there is a corner at the connection point between the steep slope and the gentle slope, stress concentration occurs at the corner of the punch that forms this drive hole. In head forging, the life of the punch is about half that of an iron screw and about 1/5 of a stainless steel screw, and there are various problems such as shortening the life of the punch. Yes.

本発明の目的は、このような課題を解消するとともにドライバビットの係合羽根やねじの係合溝に僅かの誤差が生じていてもこれを吸収して確実に嵌って係合する係合溝を得ることである。   An object of the present invention is to solve such a problem and to engage even if a slight error occurs in an engagement blade of a driver bit or an engagement groove of a screw, and to engage and engage securely Is to get.

本発明の目的は、係合溝１１が中心から放射方向に且つ円周方向に等間隔を設けて配置されて形成された駆動穴１０を有する頭部２とこの頭部２と一体で且つねじ山３が形成された脚部４とからなるねじにおいて、前記係合溝１１の底面１３を中心側が傾斜のきつい直線状の急斜面１３ａと外周側が傾斜の緩い直線状の緩斜面１３ｂとから構成してこの係合溝１１の係合壁１２の面積を大きく形成し、しかも、これら急斜面１３ａと緩斜面１３ｂとを弧状面１４で接続した駆動穴付きねじを提供することで達成される。また、この構成において、急斜面１３ａと緩斜面１３ｂとを接続する弧状面１４はねじ１の中心線に沿う平面上に中心を有し、半径Ｒで形成された円弧形状であって、急斜面１３ａと緩斜面１３ｂとが交叉して得られる角部を除くようにしたことで、ドライバビットとの係合が常時安定し、大きな駆動力の伝達が可能になる。   An object of the present invention is to provide a head 2 having a drive hole 10 formed by disposing engagement grooves 11 radially from the center and at equal intervals in the circumferential direction, and is integrated with the head 2 and screwed. In the screw comprising the leg portion 4 formed with the mountain 3, the bottom surface 13 of the engagement groove 11 is composed of a steep straight slope 13 a with a slanted central side and a straight gentle slope 13 b with a slanted outer peripheral side. This is achieved by providing a screw with a drive hole in which the area of the engagement wall 12 of the lever engaging groove 11 is made large and the steep slope 13a and the gentle slope 13b are connected by an arcuate surface 14. In this configuration, the arcuate surface 14 connecting the steep slope 13a and the gentle slope 13b has a center on a plane along the center line of the screw 1 and has an arc shape formed with a radius R, and the steep slope 13a By removing the corner obtained by crossing the gentle slope 13b, the engagement with the driver bit is always stable, and a large driving force can be transmitted.

本発明によれば、従来のように係合溝を構成する底面が円弧形状のものと比べて、ドライバビットとの接触可能面積が増加し、単位面積当たりの駆動力が減少する。また、この係合溝を圧造成形する際のねじの寸法に応じた成形深さの測定等の管理も簡単になる。更に、きつい傾斜の急斜面と緩い傾斜の緩斜面との接続部は角部がなくなって円弧形状となっているので、ドライバビットの係合羽根の角部が干渉せず、急斜面と緩斜面は常にドライバビットの係合羽根の稜線に接近することができ、ドライバビットの駆動力の伝達のための係合面積が広く得られる。しかも、この頭部圧造成形に使用するパンチも急斜面と緩斜面との接続部が円弧形状となり、角部がなくなることで、圧造成形時にパンチのこの部分に応力集中が生じず、この成形作業におけるパンチの寿命も長く、製造コストが低減される。その上、直線状の急斜面と緩斜面とをこれら斜面で形成される角部を除去するよう半径Ｒの円弧で接続しているだけであるから、パンチの製造における加工も簡単になる等の特有の効果が得られる。   According to the present invention, the area that can be contacted with the driver bit is increased and the driving force per unit area is reduced as compared with the conventional case where the bottom surface forming the engagement groove has an arc shape. In addition, management such as measurement of the forming depth according to the dimensions of the screw when the engaging groove is formed by forging becomes easy. In addition, since the corners of the connecting part between the steep slope with a steep slope and the gentle slope with a gentle slope are eliminated and the corner of the engagement blade of the driver bit does not interfere, the steep slope and the gentle slope are always The ridgeline of the engagement blade of the driver bit can be approached, and the engagement area for transmitting the driving force of the driver bit can be widely obtained. Moreover, the punch used for head forging molding also has an arc shape at the connection between the steep slope and the gentle slope, and there is no corner, so stress concentration does not occur in this part of the punch during forging molding. The punch life is also long and the manufacturing cost is reduced. In addition, the straight steep slope and the gentle slope are simply connected by an arc having a radius R so as to remove the corners formed by these slopes. The effect is obtained.

以下、本発明の実施の形態を図１乃至図５に基づき説明する。図１及び図２において、１は頭部２とこれと一体で且つねじ山３が形成された脚部４とからなるねじである。このねじ１の頭部２は通常のねじの頭部よりその厚みが薄く形成してあり、所謂、薄頭ねじである。これには図３に示す専用のドライバビット２０の駆動穂先が嵌る駆動穴１０が形成してあり、この駆動穴１０はねじ１の中心から放射方向に且つ円周方向に等間隔を設けて配置された係合溝１１と中心線上の穴とから構成されている。   Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2, reference numeral 1 denotes a screw including a head 2 and a leg 4 that is integral with the head 2 and has a thread 3 formed thereon. The head 2 of the screw 1 is formed so as to be thinner than a normal screw head, and is a so-called thin head screw. This is formed with a drive hole 10 into which the drive tip of the dedicated driver bit 20 shown in FIG. 3 is fitted, and this drive hole 10 is arranged radially from the center of the screw 1 and at equal intervals in the circumferential direction. It is comprised from the made engaging groove 11 and the hole on a centerline.

この係合溝１１の両側には係合壁１２が設けてあり、この係合壁１２の間には係合溝１１の底面１３が形成されている。この係合溝１１の底面１３は中心側が傾斜のきつい急斜面１３ａとなっており、外周側は傾斜の緩い緩斜面１３ｂとなって夫々直線形状となっている。この急斜面１３ａと緩斜面１３ｂとの境界は通常、駆動穴１０の深さのほぼ中程に位置しており、その緩斜面１３ｂの勾配（α）はねじ１の中心線に対する急斜面１３ａの勾配（β）の１．５〜２．５倍程度に設定されている。このため、係合溝１１の中心から頭部２の外周にかけての長さは通常のねじの係合溝より長くなっている。   Engagement walls 12 are provided on both sides of the engagement groove 11, and a bottom surface 13 of the engagement groove 11 is formed between the engagement walls 12. The bottom surface 13 of the engaging groove 11 has a steep steep slope 13a at the center side and a gentle slope 13b with a gentle slope on the outer peripheral side, each having a linear shape. The boundary between the steep slope 13a and the gentle slope 13b is usually located approximately in the middle of the depth of the drive hole 10, and the slope (α) of the gentle slope 13b is the slope of the steep slope 13a with respect to the center line of the screw 1 ( It is set to about 1.5 to 2.5 times β). For this reason, the length from the center of the engagement groove 11 to the outer periphery of the head 2 is longer than the engagement groove of a normal screw.

また、この急斜面１３ａと緩斜面１３ｂとの間は弧状面１４で接続してあり、この弧状面１４はねじ１の中心線に沿う平面上に中心を有し、半径Ｒで形成された円弧形状であって、急斜面１３ａと緩斜面１３ｂとが交叉して得られる角部を除くようになっている。この半径Ｒは前記急斜面１３ａと緩斜面１３ｂとが残る範囲であれば、その大きさは特に限定されず、要するに急斜面１３ａと緩斜面１３ｂとの接続部である角部が除かれればよい。   The steep slope 13a and the gentle slope 13b are connected by an arcuate surface 14. The arcuate surface 14 has a center on a plane along the center line of the screw 1 and has an arc shape formed with a radius R. However, corners obtained by crossing the steep slope 13a and the gentle slope 13b are excluded. The radius R of the radius R is not particularly limited as long as the steep slope 13a and the gentle slope 13b remain. In short, a corner portion that is a connection portion between the steep slope 13a and the gentle slope 13b may be removed.

更に、前記頭部２と脚部４との間には頭部側が大径となった逆円錐形状の補強部５が形成されている。この補強部５は頭部２の中心に形成される駆動穴１０が脚部４まで形成されることから、ねじ１の首部を補強するためのものであり、この補強部５の高さはワーク（図示せず）へのねじ締め時にワークにこれが当たり、ねじ浮き状態となる等の支障を生じないように必要最小限度の高さに設定されている。この補強部５は、前記係合溝１１の底面１３が緩斜面１３ｂを有していることから駆動穴１０の深さは比較的浅くでき、これに伴い前記補強部５の高さも低くなり、ワークに対する締め付け時の制限がより少なくなり、ワークに締め付けた時に支障が生じなくなる。   Further, an inverted conical reinforcing portion 5 having a large diameter on the head side is formed between the head portion 2 and the leg portion 4. The reinforcing portion 5 is for reinforcing the neck portion of the screw 1 because the drive hole 10 formed in the center of the head 2 is formed up to the leg portion 4. The height of the reinforcing portion 5 is the workpiece. The height is set to a minimum level so as not to cause a problem such that the workpiece hits the workpiece when screwing (not shown) and the screw floats. In this reinforcing portion 5, the bottom surface 13 of the engaging groove 11 has a gentle slope 13b, so that the depth of the driving hole 10 can be made relatively shallow, and accordingly, the height of the reinforcing portion 5 is also reduced. There are fewer restrictions when tightening on the workpiece, and no trouble occurs when tightening on the workpiece.

一方、この駆動穴１０を有するねじ１は通常の＋形状の駆動穂先が形成されたドライバビットを使用することもできるが、図３に示すような穂先形状の専用のドライバビット２０を使用することで、よりその効果を引き出すことができる。即ち、駆動穂先にはその中心部から＋形状の係合羽根２１が立設されており、この係合羽根２１の稜線を含む面２２は先端側においてはその傾斜がきつい急斜面２２ａと外周側は緩い緩斜面２２ｂとが形成されている。この穂先は前記ねじ１の駆動穴１０を構成する係合溝１１の底面１３に沿う形状となっており、これにより、図４に示すように、ドライバビット２０の係合羽根２１の接触面積も大きくなっている。また、これら係合羽根２１の間には溝２３が形成してあり、この溝２３に前記ねじ１の係合溝１１間の突状部１５が嵌るようになっている。   On the other hand, the screw 1 having the drive hole 10 can use a driver bit in which a normal + -shaped drive tip is formed, but uses a dedicated driver bit 20 having a tip shape as shown in FIG. This can bring out the effect more. In other words, a + -shaped engagement blade 21 is erected from the center of the drive tip, and the surface 22 including the ridge line of the engagement blade 21 has a steep slope on the tip side and a steep slope 22a and an outer peripheral side. A loose gentle slope 22b is formed. This tip has a shape along the bottom surface 13 of the engagement groove 11 constituting the drive hole 10 of the screw 1, and as a result, as shown in FIG. 4, the contact area of the engagement blade 21 of the driver bit 20 is also increased. It is getting bigger. Further, a groove 23 is formed between the engagement blades 21, and the protruding portion 15 between the engagement grooves 11 of the screw 1 is fitted into the groove 23.

このように構成された駆動穴１０を有するねじ１をワーク（図示せず）に締め付ける場合は、図４に示すように、この駆動穴１０に沿う前記専用ドライバビット２０を駆動穴１０に嵌め込ませる。これにより、係合羽根２１は係合溝１１の底面１３に沿い嵌り込む。この後、ドライバビット２０に締め付け方向の駆動力を作用させる。これにより、駆動力は係合壁１２を介して伝達され、ねじ１はワークに締め付けられて部品（図示せず）がワークに取り付けられてねじ締め作業が完了状態となる。   When the screw 1 having the drive hole 10 configured as described above is fastened to a work (not shown), the dedicated driver bit 20 along the drive hole 10 is fitted into the drive hole 10 as shown in FIG. . Thereby, the engagement blade 21 is fitted along the bottom surface 13 of the engagement groove 11. Thereafter, a driving force in the tightening direction is applied to the driver bit 20. As a result, the driving force is transmitted through the engagement wall 12, the screw 1 is fastened to the work, a component (not shown) is attached to the work, and the screw tightening operation is completed.

一方、このドライバビット２０の係合羽根２１がねじ１の係合溝１１に嵌ると、図５に示すようになる。即ち、係合羽根２１の稜線を含む面２２がねじ１の係合溝１１の底面１３と相似形の場合は、一点鎖線で示されたように互いの急斜面１３ａ、２２ａと緩斜面１３ｂ、２２ｂとはほぼ接触するようになるが、ドライバビット２０の係合羽根２１の急斜面２２ａと緩斜面２２ｂとが実線で示すように僅かに平行になっていない場合にはドライバビットの角部が前記一点鎖線で示した場合よりも駆動穴１０に深く入ることになる。これはねじ１の係合溝１１の角部が除かれているためであり、角部が形成されているねじに比べて駆動穴１０内を距離Ｌだけ深く入ることになる。これにより、ドライバビット２０の駆動力伝達面積は大きくなり、確実なねじ締め力が得られる。   On the other hand, when the engagement blade 21 of the driver bit 20 fits into the engagement groove 11 of the screw 1, the result is as shown in FIG. That is, when the surface 22 including the ridge line of the engagement blade 21 is similar to the bottom surface 13 of the engagement groove 11 of the screw 1, the steep slopes 13 a and 22 a and the gentle slopes 13 b and 22 b as shown by the one-dot chain line. However, when the steep slope 22a and the gentle slope 22b of the engagement blade 21 of the driver bit 20 are not slightly parallel as shown by the solid line, the corner of the driver bit is the one point. The drive hole 10 is deeper than that indicated by the chain line. This is because the corner of the engaging groove 11 of the screw 1 is removed, and the driving hole 10 is deeper than the screw having the corner by a distance L. Thereby, the driving force transmission area of the driver bit 20 is increased, and a reliable screwing force can be obtained.

本発明の実施の形態を示す要部断面正面図である。It is a principal part sectional front view showing an embodiment of the invention. 図１の平面図である。It is a top view of FIG. 本発明とドライバビットとを示す要部断面正面図である。It is a principal part sectional front view showing the present invention and a driver bit. 本発明とドライバビットとの係合状態を示す拡大要部断面図である。It is an expanded principal part sectional view which shows the engagement state of this invention and a driver bit. 係合溝と係合羽根との関係を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the relationship between an engagement groove | channel and an engagement blade | wing. 従来例を示す要部断面正面図である。It is a principal part cross-sectional front view which shows a prior art example. もう一つの従来例を示す要部正面図である。It is a principal part front view which shows another prior art example.

符号の説明Explanation of symbols

１ ねじ
２ 頭部
３ ねじ山
４ 脚部
５ 補強部
１０ 駆動穴
１１ 係合溝
１２ 係合壁
１３ 底面
１３ａ 急斜面
１３ｂ 緩斜面
１４ 弧状面
１５ 突状部
２０ ドライバビット
２１ 係合羽根
２２ 稜線を含む面
２２ａ 急斜面
２２ｂ 緩斜面
２３ 溝 DESCRIPTION OF SYMBOLS 1 Screw 2 Head 3 Screw thread 4 Leg part 5 Reinforcement part 10 Drive hole 11 Engagement groove 12 Engagement wall 13 Bottom face 13a Steep slope 13b Slow slope 14 Arc-shaped surface 15 Projection 20 Driver bit 21 Engagement blade 22 Including ridgeline Surface 22a Steep slope 22b Slow slope 23 Groove

Claims (2)

係合溝（１１）が中心から放射方向に且つ円周方向に等間隔を設けて配置されて形成された駆動穴（１０）を有する頭部（２）とこの頭部と一体で且つねじ山（３）が形成された脚部（４）とからなるねじにおいて、
前記係合溝の底面（１３）を中心側が傾斜のきつい直線状の急斜面（１３ａ）と外周側が傾斜の緩い直線状の緩斜面（１３ｂ）とから構成してこの係合溝の係合壁（１２）の面積を大きく形成し、しかも、これら急斜面と緩斜面とを弧状面（１４）で接続したことを特徴とする駆動穴付きねじ。 A head (2) having a drive hole (10) formed with engagement grooves (11) arranged radially from the center and at equal intervals in the circumferential direction, and a screw thread integral with the head. In a screw consisting of a leg (4) formed with (3),
The bottom surface (13) of the engaging groove is composed of a straight steep slope (13a) with a slanted central side and a straight gentle slope (13b) with a slanted outer peripheral side, and the engaging wall ( 12) A screw with a drive hole, characterized in that the area of 12) is large and the steep and gentle slopes are connected by an arcuate surface (14). 急斜面と緩斜面とを接続する弧状面はねじの中心線に沿う平面上に中心を有し、半径Ｒで形成された円弧形状であって、急斜面と緩斜面とが交叉して得られる角部を除くようにしたことを特徴とする請求項１記載の駆動穴付きねじ。
The arcuate surface connecting the steep slope and the gentle slope has a center on a plane along the center line of the screw, is an arc shape formed with a radius R, and is a corner obtained by crossing the steep slope and the gentle slope The screw with a drive hole according to claim 1, wherein the screw is removed.
JP2004277688A 2004-09-24 2004-09-24 Screw with driving hole Pending JP2006090456A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011129026A1 (en) * 2010-04-16 2011-10-20 日東精工株式会社 Screw driving hole
JP2013539841A (en) * 2010-08-02 2013-10-28 ジェティド コーポレイション Device for fastening threaded fasteners
WO2014102959A1 (en) * 2012-12-27 2014-07-03 日東精工株式会社 Cross recess for screw

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JPS5836617U (en) * 1981-09-03 1983-03-10 野々山　勝 upset bolt
JP2003013924A (en) * 2001-06-29 2003-01-15 Katsuyuki Totsu Combination of screw and driver bit and header punch for manufacturing screw
JP2003011071A (en) * 2001-07-03 2003-01-15 Symbolic Atorii:Kk Work shortening driver

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS5836617U (en) * 1981-09-03 1983-03-10 野々山　勝 upset bolt
JP2003013924A (en) * 2001-06-29 2003-01-15 Katsuyuki Totsu Combination of screw and driver bit and header punch for manufacturing screw
JP2003011071A (en) * 2001-07-03 2003-01-15 Symbolic Atorii:Kk Work shortening driver

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011129026A1 (en) * 2010-04-16 2011-10-20 日東精工株式会社 Screw driving hole
JP2011226520A (en) * 2010-04-16 2011-11-10 Nitto Seiko Co Ltd Driving hole for screw
CN102859212A (en) * 2010-04-16 2013-01-02 日东精工株式会社 Screw driving hole
JP2013539841A (en) * 2010-08-02 2013-10-28 ジェティド コーポレイション Device for fastening threaded fasteners
KR20140037004A (en) * 2010-08-02 2014-03-26 제이티드 코오포레이션 Apparatus for tightening threaded fasteners
KR20140046392A (en) * 2010-08-02 2014-04-18 제이티드 코오포레이션 Apparatus for tightening threaded fasteners
KR102083876B1 (en) 2010-08-02 2020-03-03 제이티드 코오포레이션 Apparatus for tightening threaded fasteners
KR102095849B1 (en) 2010-08-02 2020-04-01 제이티드 코오포레이션 Apparatus for tightening threaded fasteners
WO2014102959A1 (en) * 2012-12-27 2014-07-03 日東精工株式会社 Cross recess for screw
JPWO2014102959A1 (en) * 2012-12-27 2017-01-12 日東精工株式会社 Cross hole for screw

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