JP2010014237A - Drive hole for screw member - Google Patents

Drive hole for screw member Download PDF

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JP2010014237A
JP2010014237A JP2008176322A JP2008176322A JP2010014237A JP 2010014237 A JP2010014237 A JP 2010014237A JP 2008176322 A JP2008176322 A JP 2008176322A JP 2008176322 A JP2008176322 A JP 2008176322A JP 2010014237 A JP2010014237 A JP 2010014237A
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screw member
hole
engagement
drive hole
head
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JP5475968B2 (en
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Toshimasa Toyooka
利昌 豊岡
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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 a drive hole for a screw member having easy biting of a head driving hole of a screw in a tip of a driver bit and positive transmission of driving force from the driver bit. <P>SOLUTION: The drive hole can bite into a driving force transmitting part of the driver bit since sidewalls 21 of five engagement grooves 20 respectively extending in radial directions are formed as inclined faces inclined in a narrowing direction of an interval toward a bottom face 22, a face 23 in a radial direction of the engagement groves 20 is steeply inclined inward, and a planar connection wall 31 projecting like a chevron shape at an angle of 120 degrees in a cross section orthogonal to a center line (a) of the screw member and inclined such that a top face side spreads from a conical face 11 of an engagement hole part 10 toward a hill part top face is formed in a drive hole side of the hill part 30 between the engagement grooves 20. Since the sidewall of the engagement groove contacts an engagement blade of the driver bit, an area receiving driving force is increased, and breakage of a head of the screw member hardly occurs. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、携帯電話、パソコン、カーナビゲーション、ゲーム機等の電子機器に使用される脚部径より大きい直径の頭部を有するねじ部材において、特に、誰でも分解修理できないようにするために使用される頭部に形成されたねじ部材の駆動穴に関する。   The present invention is used for a screw member having a head having a diameter larger than a leg diameter used for electronic devices such as a mobile phone, a personal computer, a car navigation system, a game machine, etc., particularly for preventing anyone from disassembling and repairing. It is related with the drive hole of the screw member formed in the head to be made.

近年多く普及している携帯電話、パソコン、カーナビゲーション及び液晶あるいはプラズマ方式のテレビ等はこれら液晶あるいはプラズマパネルと樹脂あるいはアルミ合金製の筐体との組立において多くの金属製のねじ部材が採用されている。これらねじ部材で取り付けられている製品はユーザが勝手に取り外して修理したり、分解したりすると、内蔵されている電子部品が破損したり、また、高電圧を有していることもあり、このため、思わぬ事故が発生する等の予期しない事故が起こることもある。このため、一般に普及しているプラス、マイナス形状をしたドライバビットが使用できない特殊なねじが採用されている。   Mobile phones, personal computers, car navigation systems, and liquid crystal or plasma televisions, which have been widely used in recent years, employ many metal screw members in assembling these liquid crystal or plasma panels and resin or aluminum alloy housings. ing. If the product attached with these screw members is removed and repaired or disassembled by the user, the built-in electronic components may be damaged or may have high voltage. Therefore, unexpected accidents such as unexpected accidents may occur. For this reason, a special screw that cannot be used for a plus or minus shaped driver bit that is widely used is adopted.

このような現状において普及しつつあるのが例えば、図７に示すようなねじである。これは、ねじ１０１の頭部１０４に中心から放射方向に延びた係合溝１２０を等間隔をおいて五本形成したもので、この係合溝１２０を有する駆動穴に合うドライバビットによりねじ込み駆動力を加えるようにしたものである。これは、隣り合う係合溝１２０を構成する側壁１２１を駆動穴の中心近くで円弧形状の接続壁１３１で接続した形状である。   In such a current situation, for example, screws as shown in FIG. This is one in which five engagement grooves 120 extending radially from the center are formed in the head 104 of the screw 101 at equal intervals, and screwed by a driver bit that fits the drive hole having the engagement groove 120. It is something that adds power. This is a shape in which the side walls 121 constituting the adjacent engagement grooves 120 are connected by an arc-shaped connection wall 131 near the center of the drive hole.

また、この他の従来例としての具体的なものに、実開平４−２８２０６号公報に記載されているようなものがある。これは、ねじ部と頭部とから成り、図８に示すように、頭部に形成したビット嵌合溝２２０を中心位置の非トルク伝達部Ａと等間隔位置に配置され非トルク伝達部Ａから半径方向外側に延びる５個又は６個のトルク伝達係止部Ｂとから構成し、この各トルク伝達係止部Ｂの半径方向延長部分には半径線と平行な直線部分２２１を構成するとともに各トルク伝達係止部Ｂの先端部分をアール形状に構成したものである。そして、トルク伝達係止部Ｂの内側、即ち、ねじの頭部中心側は大きな円弧形状の面で接続されている。
実開平４−２８２０６号公報 Another specific example of the prior art is described in Japanese Utility Model Laid-Open No. 4-28206. This is composed of a screw portion and a head portion, and as shown in FIG. 8, a bit fitting groove 220 formed in the head portion is disposed at a position equidistant from the non-torque transmission portion A at the center position. And 5 or 6 torque transmission locking portions B extending radially outward from each other, and a linearly extending portion 221 parallel to the radial line is formed in the radially extending portion of each torque transmission locking portion B. The distal end portion of each torque transmission locking portion B is configured in a round shape. And the inside of the torque transmission locking part B, that is, the head center side of the screw is connected by a large arc-shaped surface.
Japanese Utility Model Publication No. 4-28206

しかしながら、このように互いに隣設する係合溝の側壁を円弧形状の接続壁で接続した場合は、平面で接続した場合に比較して角が無くなることで、この部分に応力集中を生じず駆動穴が破損しにくいように思われるが、ドライバビットの駆動力は通常、係合溝の側壁にドライバビットの係合羽根が当接して駆動することから、接続壁が円弧形状であっても、山形形状の平面であってもほとんど応力集中は生じないが、このように円弧形状にすることで、この駆動穴に嵌るドライバビットはその基部が細くなり、低い駆動力でもその基部から破損することがある。また、実開平４−２８２０６号公報に開示されている駆動穴は、そのトルク伝達係止部の半径方向延長部分にはねじの中心からの半径線と平行な直線部分を構成しており、即ち、側壁の面は係止部の中心線と平行になっているとともに隣接する係合溝の側壁を接続する接続壁は円弧形状となっているから、この側壁の駆動力の伝達面積が少なくドライバビットで大きな駆動力が伝達されても、そのトルク伝達係止部に駆動力が集中することになり、ドライバビットの寿命が比較的短くなっている。更に、トルク伝達係止部に伝達駆動力が集中し、単位面積当たりに大きな力が加わることから、この駆動穴の破損を生じやすい等の課題がある。   However, when the side walls of the engaging grooves adjacent to each other in this way are connected by an arc-shaped connection wall, the corners are eliminated as compared with the case where they are connected in a plane, so that no stress concentration occurs in this portion. Although it seems that the hole is unlikely to break, the driving force of the driver bit is normally driven by the engagement blade of the driver bit coming into contact with the side wall of the engagement groove. Even if it is a chevron-shaped flat surface, almost no stress concentration occurs, but with this circular arc shape, the driver bit that fits in this drive hole becomes thin at the base, and it can be damaged from the base even at low drive force There is. Further, the drive hole disclosed in Japanese Utility Model Laid-Open No. 4-28206 constitutes a linear portion parallel to the radial line from the center of the screw in the radially extending portion of the torque transmission locking portion, Since the side wall surface is parallel to the center line of the locking portion and the connecting wall connecting the side walls of the adjacent engaging grooves has an arc shape, the driving force transmission area of this side wall is small and the driver Even if a large driving force is transmitted by the bit, the driving force is concentrated on the torque transmission engaging portion, and the life of the driver bit is relatively short. Further, since the transmission driving force is concentrated on the torque transmission locking portion and a large force is applied per unit area, there is a problem that the driving hole is easily damaged.

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先端にねじの頭部駆動穴が食い付きやすく且つドライバビットからの駆動力の伝達が確実なねじ部材の駆動穴を得ることである。   An object of the present invention is to eliminate such problems and to obtain a screw member drive hole in which a screw head drive hole is likely to bite into the tip of the driver bit and the driving force is reliably transmitted from the driver bit. is there.

本発明の目的は、外周にねじ山３が形成された脚部２とこの脚部２と一体の頭部４とから構成され、この頭部４にドライバビット４０の先端に形成されている駆動伝達部４１が係合可能な駆動穴が形成されたねじ部材において、前記駆動穴は嵌合穴部１０を中心に等角度で且つ放射方向に夫々延設された五本の係合溝２０を有し、この一つの係合溝２０を構成する側壁２１は頭部上面から溝の底面２２に達するにつれてその間隔が狭まる方向に傾斜した斜面とし、一方、この係合溝２０の放射方向端の面２３は溝の底面２２に達するにつれてねじ部材の中心線（ａ）に接近するよう内方へ急傾斜させ、更に、前記係合溝２０と係合溝２０との間に形成されている丘陵部３０の駆動穴側には、互いに隣設する係合溝２０の側壁２１を接続するよう前記ねじ部材の中心線（ａ）に直交する横断面上において１２０°の角度でねじ部材の中心線側へ山形形状に突出するとともに嵌合穴部１０の底をなす円錐面１１から頭部４の丘陵部上面にかけてこの上面側が広がるよう傾斜した平面状の接続壁３１が形成されているねじ部材の駆動穴を提供することで達成される。   An object of the present invention is composed of a leg 2 having a thread 3 formed on the outer periphery and a head 4 integral with the leg 2, and a drive formed on the head 4 at the tip of a driver bit 40. In the screw member in which the drive hole to which the transmission part 41 can be engaged is formed, the drive hole has five engagement grooves 20 extending at equal angles around the fitting hole part 10 in the radial direction. The side wall 21 constituting the one engaging groove 20 is a slope inclined in a direction in which the interval is narrowed from the upper surface of the head toward the bottom surface 22 of the groove, while the radial end of the engaging groove 20 is As the surface 23 reaches the bottom surface 22 of the groove, it is steeply inclined inward so as to approach the center line (a) of the screw member, and further, a hill formed between the engagement groove 20 and the engagement groove 20. The side wall 21 of the engaging groove 20 adjacent to each other is connected to the drive hole side of the portion 30. On the cross section perpendicular to the center line (a) of the screw member, the head 4 protrudes from the conical surface 11 that protrudes in a mountain shape toward the center line side of the screw member at an angle of 120 ° and forms the bottom of the fitting hole 10. This is achieved by providing a drive hole for a screw member in which a flat connection wall 31 is formed so that the upper surface side spreads over the upper surface of the hill.

また、本発明の目的は、前記構成に加えて、側壁は係合溝の中心線（ｂ）を挟んで対向するとともにその間隔は前記係合溝２０の放射方向端から嵌合穴部１０の中心に接近するにつれて拡開しているねじ部材の駆動穴とすることでも達成され、更に、これら構成において、駆動穴の円錐面は係合溝の中心線（ｂ）を含み且つねじ部材の軸線に沿う断面において係合溝２０の底面２２と同一傾斜直線上に位置しており、その係合溝２０の放射方向端における底面２２と放射方向端の面２３とは鈍角をなして交叉接続されているねじ部材の駆動穴であることから、ねじ部材の頭部の厚みが薄くても、ねじ部材の中心から係合溝の放射方向端までの長さを短くできるので、比較的頭部厚みが薄いねじに対しても十分に対応できる。   In addition to the above configuration, the object of the present invention is that the side walls face each other across the center line (b) of the engaging groove, and the distance between them is from the radial end of the engaging groove 20 to the fitting hole 10. It is also achieved by a drive hole of the screw member that expands toward the center, and in these configurations, the conical surface of the drive hole includes the center line (b) of the engagement groove and the axis of the screw member , The bottom surface 22 of the engagement groove 20 is located on the same inclined straight line, and the bottom surface 22 at the radial end of the engagement groove 20 and the surface 23 of the radial end are cross-connected at an obtuse angle. Therefore, even if the screw member head is thin, the length from the center of the screw member to the radial end of the engagement groove can be shortened. However, it can sufficiently handle even thin screws.

本発明によれば、互いに隣設する係合溝の側壁を接続する接続壁がねじ部材の中心線方向へ突出した山形形状で且つ嵌合穴部から丘陵部の上面にかけて上面側が広がるよう傾斜した平坦面であるので、これに沿うドライバビットを駆動穴に挿入係合させることで、この駆動穴がドライバビットの駆動伝達部に食い付くことができる。また、このようにドライバビットの駆動伝達部を構成する係合羽根の基部はねじ部材の駆動穴の平面状の接続壁に沿う形状なので、基部が円弧形状のものと比較して太くなって強固になり、比較的大きな駆動力の伝達が可能になるとともにドライバビットの寿命も長い。更に、ねじ部材に駆動力を伝達する係合溝の側壁は係合溝の放射方向端側にかけての部分がドライバビットの係合羽根に接するようになっているので、ドライバビットの駆動力を受ける面積が広くなり、駆動力の伝達が分散されるからドライバビットの寿命が長いとともにねじ部材の頭部の破損が発生しにくい。しかも、このようなねじ部材の駆動穴を圧造成型により成形する際に、全ての駆動穴の壁及び係合溝の壁が深くなるほど夫々の中心線側に接近するよう傾斜しているので、駆動穴の周囲における材料の流れが均一になり、比較的強度の高い駆動穴が得られる等の特有の効果がある。   According to the present invention, the connecting wall connecting the side walls of the engaging grooves adjacent to each other has a mountain shape protruding in the center line direction of the screw member, and is inclined so that the upper surface side spreads from the fitting hole portion to the upper surface of the hill portion. Since it is a flat surface, this drive hole can bite into the drive transmission portion of the driver bit by inserting and engaging the driver bit along this with the drive hole. Further, since the base portion of the engagement blade constituting the drive transmission portion of the driver bit is in a shape along the planar connection wall of the drive hole of the screw member, the base portion is thicker and stronger than the circular shape. Thus, a relatively large driving force can be transmitted and the life of the driver bit is long. Further, the side wall of the engaging groove that transmits the driving force to the screw member is configured such that the portion of the engaging groove toward the radial end is in contact with the engaging blade of the driver bit, so that the driving force of the driver bit is received. Since the area is increased and the transmission of the driving force is distributed, the life of the driver bit is long and the head of the screw member is hardly damaged. Moreover, when the drive holes of such screw members are formed by forging molding, since the walls of all the drive holes and the walls of the engagement grooves are deeper, they are inclined so as to approach the respective center line sides. There are specific effects such as a uniform material flow around the drive holes and a relatively strong drive hole.

以下、本発明について最良の実施の形態を図１乃至図６に基づき説明する。本発明の一実施例を示す図１及び図２において、１は外周にねじ山３が形成された軸状の脚部２とこれと一体となった頭部４とからなるねじ部材である。この頭部４にはねじ部材１にねじ締め駆動力を与える図５に示すドライバビット４０の駆動伝達部４１が係合可能な駆動穴が形成してあり、この駆動穴はねじ部材１の中心線上に頭部４の表面から概略矩形穴で深くなるほど先窄まりとなるように傾斜した形状となっている。この駆動穴はねじ部材の中心線（ａ）を中心として円周方向等間隔の角度（具体的には図３に示すように、７２°である。）で且つ中心から放射方向に延びる係合溝２０を五本有し、中心には断面テーパ形状の円錐面１１を形成した嵌合穴部１０を有している。   The best mode for carrying out the present invention will be described below with reference to FIGS. 1 and 2 showing an embodiment of the present invention, reference numeral 1 denotes a screw member comprising a shaft-like leg portion 2 having a thread 3 formed on the outer periphery and a head portion 4 integrated therewith. The head 4 is formed with a drive hole in which a drive transmission portion 41 of a driver bit 40 shown in FIG. 5 that applies a screw tightening driving force to the screw member 1 can be engaged, and this drive hole is the center of the screw member 1. On the line, the shape is inclined so as to become tapered as it becomes deeper from the surface of the head 4 by a substantially rectangular hole. This drive hole is an engagement that extends in the radial direction from the center at an equally spaced angle in the circumferential direction (specifically, 72 ° as shown in FIG. 3) about the center line (a) of the screw member. Five grooves 20 are provided, and a fitting hole 10 having a conical surface 11 having a tapered cross section is formed at the center.

この駆動穴の嵌合穴部１０を中心にこれの放射方向には係合溝２０が形成してあり、この嵌合穴部１０から放射方向に延びている係合溝２０は全て同じ形状に形成されている。これらの係合溝２０を構成する夫々の側壁２１は図３に示すように、頭部上面から係合溝２０の底面２２に達するにつれてその間隔が狭まる方向に傾斜した斜面となっており、即ち、ねじ部材１の中心線に沿う係合溝の中心線（ｂ）を含む面を挟んで一方若しくは両方の側壁２１の間隔が深くなるにつれて狭まる構成となっている。また、この係合溝２０の放射方向端の面２３は溝の底面２２に達するにつれてねじ部材１の中心線に接近するよう内方へ急傾斜しており、具体的には、係合溝２０の放射方向端の面２３は図４に示すように、ねじ部材の中心線（ａ）に対して角度（θ）を有しており、例えば、この角度（θ）は３０°以下が望ましく、このようにすることでねじ部材１の中心から係合溝２０の放射方向端までの距離を短くすることができるとともに深くなり、これにより頭部４から脚部２にかけて五溝付きの駆動穴を形成でき、頭部４が比較的薄いねじ部材１に好適である。   Engaging grooves 20 are formed in the radial direction around the fitting hole 10 of the drive hole, and all the engaging grooves 20 extending in the radial direction from the fitting hole 10 have the same shape. Is formed. As shown in FIG. 3, each of the side walls 21 constituting these engagement grooves 20 has a slope inclined in a direction in which the interval narrows as it reaches the bottom surface 22 of the engagement groove 20 from the upper surface of the head. The structure is such that one or both of the side walls 21 become narrower with the surface including the center line (b) of the engaging groove along the center line of the screw member 1 being sandwiched. Further, the radial end surface 23 of the engagement groove 20 steeply inwards so as to approach the center line of the screw member 1 as it reaches the bottom surface 22 of the groove. 4 has an angle (θ) with respect to the center line (a) of the screw member, as shown in FIG. 4, for example, the angle (θ) is desirably 30 ° or less, By doing so, the distance from the center of the screw member 1 to the radial end of the engagement groove 20 can be shortened and deepened, thereby forming a drive hole with five grooves from the head 4 to the leg 2. It can be formed and is suitable for the screw member 1 having a relatively thin head 4.

更に、係合溝２０の底面２２は前記駆動穴を構成する嵌合穴部１０の円錐面１１と同一直線となっており、これは、係合溝の中心線（ｂ）を含み且つねじ部材１の軸線に沿う断面において係合溝２０の底面２２と同一傾斜直線上に前記円錐面１１が位置した形状となっている。一方、この係合溝２０の放射方向端に達している底面２２と放射方向端の面２３とは前記角度（θ）を有することから鈍角をなして交叉接続した形状となっており、このような形状の係合溝２０から駆動穴は構成されている。   Further, the bottom surface 22 of the engagement groove 20 is collinear with the conical surface 11 of the fitting hole portion 10 constituting the drive hole, and this includes the center line (b) of the engagement groove and a screw member. The conical surface 11 is located on the same inclined straight line as the bottom surface 22 of the engagement groove 20 in a cross section along the axis 1. On the other hand, since the bottom surface 22 reaching the radial end of the engagement groove 20 and the radial end surface 23 have the angle (θ), they have an obtuse angle and are cross-connected. The drive hole is constituted by the engagement groove 20 having a simple shape.

しかも、これら係合溝２０の側壁２１は図３に示すように、係合溝の中心線（ｂ）を挟んで対向しており、係合溝２０を挟んで対向する側壁２１の間隔（Ｌ）は前記係合溝２０の放射方向端から嵌合穴部１０の中心に接近するにつれて即ち、頭部４の中心側の嵌合穴部１０に達するにつれて僅かではあるが拡開している。この実施例では、前記係合溝２０に囲まれている丘陵部３０を形成する係合溝２０の側壁２１がなす角、換言すれば、後記する接続壁３１に接続されている係合溝２０の側壁２１がなす角を８０°としている。この角度はこれより大きくてもよく、嵌合穴部１０に達するにつれて係合溝２０が拡開するようになっていればよい。   Moreover, as shown in FIG. 3, the side walls 21 of the engagement grooves 20 are opposed to each other with the center line (b) of the engagement grooves interposed therebetween, and the interval (L ) Slightly expands as it approaches the center of the fitting hole 10 from the radial end of the engaging groove 20, that is, as it reaches the fitting hole 10 on the center side of the head 4. In this embodiment, the angle formed by the side wall 21 of the engagement groove 20 forming the hill portion 30 surrounded by the engagement groove 20, in other words, the engagement groove 20 connected to the connection wall 31 described later. The angle formed by the side wall 21 is 80 °. This angle may be larger than this, and it is only necessary that the engagement groove 20 expands as the fitting hole 10 is reached.

一方、前記係合溝２０と係合溝２０とに囲まれて頭部４の表面を形成している丘陵部３０の嵌合穴部側には、前記隣設する係合溝２０の側壁２１の内方端を接続する接続壁３１が形成してあり、この壁３１は係合溝２０、２０間の中間に位置する個所がねじ部材１の中心線方向に突出した山形形状となっている。詳しくは、互いに隣設する係合溝２０の側壁２１を接続するよう前記ねじ部材の中心線（ａ）に直交する横断面上において１２０°の角度でねじ部材１の中心線方向へ山形形状に突出しており、この接続壁２０は駆動穴の中心部分の円錐面１１から頭部４の丘陵部３０の上面にかけてこの上面側が広がるよう図４に示すように、角度（α）だけ傾斜した平面状となっている。この角度（α）は５°前後となっており、これより角度が大きいと駆動力を伝達する側壁２１の面積が少なくなり、少ないとドライバビット４０の迅速な嵌合に支障を来すことになるので、この角度が最適な角度として望ましい。   On the other hand, the side wall 21 of the adjacent engaging groove 20 is provided on the side of the fitting hole of the hill portion 30 forming the surface of the head 4 surrounded by the engaging groove 20 and the engaging groove 20. A connecting wall 31 that connects the inner ends of the screw member 1 is formed. The wall 31 has a mountain shape in which a portion located in the middle between the engaging grooves 20 and 20 protrudes in the direction of the center line of the screw member 1. . Specifically, a mountain shape is formed in the direction of the center line of the screw member 1 at an angle of 120 ° on a cross section perpendicular to the center line (a) of the screw member so as to connect the side walls 21 of the engaging grooves 20 adjacent to each other. As shown in FIG. 4, the connection wall 20 has a planar shape inclined at an angle (α) so that the upper surface side extends from the conical surface 11 at the center of the drive hole to the upper surface of the hill portion 30 of the head 4. It has become. This angle (α) is around 5 °. If the angle is larger than this, the area of the side wall 21 for transmitting the driving force is reduced, and if it is less, the quick fitting of the driver bit 40 is hindered. Therefore, this angle is desirable as the optimum angle.

また、図５及び図６はこのようなねじ部材１にねじ締め駆動力を与えるドライバビット４０の底面図及び駆動伝達部の断面図であり、図面にも明らかなように、ドライバビット４０の駆動伝達部４１は当然にねじ部材１の駆動穴に相似した形状となっており、このような形状とすることで、ねじ部材１はドライバビット４０と嵌め合わせると、前記駆動穴の接続壁３１とドライバビット４０の駆動伝達部４１の基部とが食い付き状態となることができる。   FIGS. 5 and 6 are a bottom view of the driver bit 40 and a cross-sectional view of the drive transmission portion for giving a screw tightening driving force to the screw member 1, and the driving of the driver bit 40 is apparent from the drawings. Naturally, the transmission portion 41 has a shape similar to the drive hole of the screw member 1. By adopting such a shape, when the screw member 1 is fitted with the driver bit 40, the connection portion 31 of the drive hole The base of the drive transmission part 41 of the driver bit 40 can bite.

このような駆動穴を形成した頭部４を有するねじ部材１をワーク（図示せず）のねじ込み位置にねじ込む作業において、ドライバビット４０の先端の駆動伝達部４１に駆動穴を合致させ、この状態のまま前記ワークのねじ締め用下穴（図示せず）に合わせる。この後、ドライバビット４０にねじ締め駆動力を与えると、ねじ部材１はワークにねじ込まれる。この作業中、駆動伝達部４１は駆動穴の係合溝２０の側壁２１に接触しているから駆動力はこの側壁２１を介してねじ部材１に伝達され、ワークにねじ込まれる。このねじ込み時の駆動力は係合溝２０の側壁２１の伝達面積が従来例より広くなっているので、比較的大きな駆動力が伝達されることになるが、ドライバビット４０と駆動穴は破損することなく作業を続けることができる。   In the operation of screwing the screw member 1 having the head 4 formed with such a drive hole into the screwing position of a work (not shown), the drive hole is matched with the drive transmission portion 41 at the tip of the driver bit 40, and this state Align with the pilot hole (not shown) for screwing the workpiece. Thereafter, when a screwing driving force is applied to the driver bit 40, the screw member 1 is screwed into the workpiece. During this operation, since the drive transmission portion 41 is in contact with the side wall 21 of the engagement groove 20 of the drive hole, the driving force is transmitted to the screw member 1 through the side wall 21 and screwed into the work. As for the driving force at the time of screwing, since the transmission area of the side wall 21 of the engaging groove 20 is wider than that of the conventional example, a relatively large driving force is transmitted, but the driver bit 40 and the driving hole are damaged. You can continue working without it.

一方、このようにしてねじ込まれたワークを取り外そうとしても、通常のプラスあるいはマイナス形状のドライバビットをこの駆動穴に嵌合させることはできないので、重要部分への使用が好適であることは言うまでもない。   On the other hand, even when trying to remove the work screwed in this way, a normal plus or minus shaped driver bit cannot be fitted into this drive hole, so that it is suitable for use in an important part. Needless to say.

本発明の実施の形態としての一実施例を示す要部断面正面図である。It is a principal part sectional front view showing one example as an embodiment of the invention. 図１の側面図である。It is a side view of FIG. 図２の要部拡大図である。FIG. 3 is an enlarged view of a main part of FIG. 2. 図１の要部拡大正面図である。It is a principal part enlarged front view of FIG. 本発明に係るねじ部材に使用するドライバビットの先端正面図である。It is a tip front view of a driver bit used for a screw member concerning the present invention. ドライバビットの駆動伝達部の断面図である。It is sectional drawing of the drive transmission part of a driver bit. 本発明の従来例を示す頭部側面図である。It is a head side view which shows the prior art example of this invention. 本発明のもう一つの従来例を示す駆動穴の形状説明図である。It is shape explanatory drawing of the drive hole which shows another prior art example of this invention.

符号の説明Explanation of symbols

１ ねじ部材
２ 脚部
３ ねじ山
４ 頭部
１０ 嵌合穴部
１１ 円錐面
２０ 係合溝
２１ 側壁
２２ 底面
２３ 放射方向端の面
３０ 丘陵部
３１ 接続壁
４０ ドライバビット
４１ 駆動伝達部
ａ ねじ部材の中心線
ｂ 係合溝の中心線 DESCRIPTION OF SYMBOLS 1 Screw member 2 Leg part 3 Screw thread 4 Head 10 Fitting hole part 11 Conical surface 20 Engaging groove 21 Side wall 22 Bottom face 23 Radial end face 30 Hill part 31 Connection wall 40 Driver bit 41 Drive transmission part a Screw member Center line b Engagement groove center line

Claims (3)

外周にねじ山（３）が形成された脚部（２）とこの脚部と一体の頭部（４）とから構成され、この頭部にドライバビット（４０）の先端に形成されている駆動伝達部（４１）が係合可能な駆動穴が形成されたねじ部材において、
前記駆動穴は嵌合穴部（１０）を中心に等角度で且つ放射方向に夫々延設された五本の係合溝（２０）を有し、この一つの係合溝を構成する側壁（２１）は頭部上面から溝の底面（２２）に達するにつれてその間隔が狭まる方向に傾斜した斜面とし、一方、この係合溝の放射方向端の面（２３）は溝の底面に達するにつれてねじ部材の中心線（ａ）に接近するよう内方へ急傾斜させ、更に、前記係合溝と係合溝との間に形成されている丘陵部（３０）の嵌合穴部側には、互いに隣設する係合溝の側壁を接続するよう前記ねじ部材の中心線（ａ）に直交する横断面上において１２０°の角度でねじ部材の中心線側へ山形形状に突出するとともに嵌合穴部の底をなす円錐面（１１）から頭部の丘陵部上面にかけてこの上面側が広がるよう傾斜した平面状の接続壁（３１）が形成されていることを特徴とするねじ部材の駆動穴。 A drive comprising a leg part (2) having a thread (3) formed on the outer periphery and a head part (4) integral with the leg part, formed at the tip of a driver bit (40) on the head part In the screw member in which the drive hole in which the transmission portion (41) can be engaged is formed,
The drive hole has five engaging grooves (20) extending at equal angles and radially in the center of the fitting hole (10), and a side wall ( 21) is a slope inclined in a direction in which the interval narrows as it reaches the bottom surface (22) of the groove from the top surface of the head, while the surface (23) at the radial end of the engagement groove is threaded as it reaches the bottom surface of the groove. Inclined inward so as to approach the center line (a) of the member, and further, on the fitting hole portion side of the hill portion (30) formed between the engagement groove and the engagement groove, Projecting into a chevron shape at a 120 ° angle toward the center line side of the screw member on a cross section orthogonal to the center line (a) of the screw member so as to connect the side walls of the engaging grooves adjacent to each other and a fitting hole Inclined so that this upper surface side spreads from the conical surface (11) forming the bottom of the head portion to the upper surface of the hilly portion of the head Driving hole of the screw member characterized by planar connecting wall (31) is formed. 側壁は係合溝の中心線（ｂ）を挟んで対向するとともにその間隔は前記係合溝の放射方向端から嵌合穴部の中心に接近するにつれて拡開していることを特徴とする請求項１記載のねじ部材の駆動穴。   The side walls oppose each other with the center line (b) of the engaging groove interposed therebetween, and the distance between the side walls widens from the radial end of the engaging groove toward the center of the fitting hole. The drive hole of the screw member of claim | item 1. 駆動穴の円錐面は係合溝の中心線（ｂ）を含み且つねじ部材の軸線に沿う断面において係合溝の底面と同一傾斜直線上に位置しており、その係合溝の放射方向端における底面と放射方向端の面とは鈍角をなして交叉接続されていることを特徴とする請求項１又は２記載のねじ部材の駆動穴。   The conical surface of the drive hole includes the center line (b) of the engagement groove and is located on the same inclined straight line as the bottom surface of the engagement groove in a cross section along the axis of the screw member, and the radial end of the engagement groove 3. The screw member drive hole according to claim 1, wherein the bottom surface and the radial end surface are cross-connected at an obtuse angle.
JP2008176322A 2008-07-04 2008-07-04 Screw member drive hole Active JP5475968B2 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4978663U (en) * 1972-10-30 1974-07-08
JPH03163207A (en) * 1989-11-22 1991-07-15 O S G Hanbai Kk Screw
JPH0428206U (en) * 1990-06-29 1992-03-06
JP2000108043A (en) * 1998-09-29 2000-04-18 Katsuyuki Totsu Combination of driver bit and screw
JP2000179519A (en) * 1998-12-18 2000-06-27 Shinjo Seisakusho:Kk Screw having head part with hole, and its driver bit
JP2003166516A (en) * 2001-11-30 2003-06-13 Nitto Seiko Co Ltd Cross recessed head screw
WO2003100272A1 (en) * 2002-05-27 2003-12-04 Osg Corporation Screw tightening construction, and screw and screw tightening tool
JP2004353831A (en) * 2003-05-30 2004-12-16 Nitto Seiko Co Ltd Screw with driving hole, and driver bit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4978663U (en) * 1972-10-30 1974-07-08
JPH03163207A (en) * 1989-11-22 1991-07-15 O S G Hanbai Kk Screw
JPH0428206U (en) * 1990-06-29 1992-03-06
JP2000108043A (en) * 1998-09-29 2000-04-18 Katsuyuki Totsu Combination of driver bit and screw
JP2000179519A (en) * 1998-12-18 2000-06-27 Shinjo Seisakusho:Kk Screw having head part with hole, and its driver bit
JP2003166516A (en) * 2001-11-30 2003-06-13 Nitto Seiko Co Ltd Cross recessed head screw
WO2003100272A1 (en) * 2002-05-27 2003-12-04 Osg Corporation Screw tightening construction, and screw and screw tightening tool
JP2004353831A (en) * 2003-05-30 2004-12-16 Nitto Seiko Co Ltd Screw with driving hole, and driver bit

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