JP3139615U - Fastener - Google Patents

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JP3139615U
JP3139615U JP2007009461U JP2007009461U JP3139615U JP 3139615 U JP3139615 U JP 3139615U JP 2007009461 U JP2007009461 U JP 2007009461U JP 2007009461 U JP2007009461 U JP 2007009461U JP 3139615 U JP3139615 U JP 3139615U
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end side
spiral
shaft portion
outer diameter
male screw
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護 片岡
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護 片岡
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Abstract

【課題】締め直しを不要にする。
【解決手段】セルフタッピングボルト1とナット体2から成り、ナット体2にセルフタッピングボルト1の軸部3を捻じ込む下孔4を貫設し、セルフタッピングボルト1は、その軸部3の外周に螺旋条5を突設すると共に、軸部3の先端側で螺旋条5の始端側に下孔4の内周に雌螺子を削成する切り刃6を設けており、螺旋条5の谷部7での軸部3の外径を下孔4の内径より小径にすると共に、螺旋条5の山部8での軸部3の外径を始端側から他端側に従い徐々に大径に調製し、一方ナット体2の下孔4の内径を螺旋条5の山部8での軸部3の最小外径以上で且つ最大外径より小さくすることによって、下孔4に軸部3を捻じ込み雌螺子を削成しつつ、軸部3により下孔4を押し広げさせ、拡張に抗する下孔4の復元力にて軸部3を締め付け、セルフタッピングボルト1とナット体2を一体化する。
【選択図】図1
[PROBLEMS] To eliminate retightening.
A self-tapping bolt (1) and a nut body (2) are provided, and a lower hole (4) into which a shaft portion (3) of the self-tapping bolt (1) is screwed is formed in the nut body (2). And a cutting blade 6 for cutting a female screw on the inner periphery of the lower hole 4 on the leading end side of the spiral strip 5 on the tip side of the shaft portion 3. The outer diameter of the shaft portion 3 at the portion 7 is made smaller than the inner diameter of the lower hole 4, and the outer diameter of the shaft portion 3 at the peak portion 8 of the spiral strip 5 is gradually increased from the starting end side to the other end side. On the other hand, the inner diameter of the lower hole 4 of the nut body 2 is set to be equal to or larger than the minimum outer diameter of the shaft portion 3 at the peak portion 8 of the spiral strip 5 and smaller than the maximum outer diameter. While the screwed female screw is being sharpened, the lower hole 4 is pushed and expanded by the shaft 3 and the shaft 3 is tightened by the restoring force of the lower hole 4 that resists expansion. To integrate the self-tapping bolt 1 and the nut body 2.
[Selection] Figure 1

Description

本考案は、従来のボルトとナットによる締結具に比して緩み難く締結状態をより強固に堅持可能な締結具に関する。   The present invention relates to a fastener that is less likely to loosen than a conventional fastener using bolts and nuts, and that can hold the fastening state more firmly.

従来より、物品の締結には、ボルトとナットが使われ、例えば、一対の被締結物の各々に取付孔を貫設し、両被締結物の取付孔を位置合わせし、一方の取付孔からボルトの軸部を挿通し、他方の取付孔から突出した軸部にナットを螺合させるのである。
又、ボルトの頭部と被締結物との間に座金を挟持させたり、ナットと被締結物との間に座金とワッシャーを挟持させ、ナットが、ワッシャーの反力にて軸部の先端側へ付勢されることで、ボルトの螺子山部の斜面とナットの螺子山部の斜面が相互に押圧されて、密着し、ナットの回転に伴う摩擦を増大させることで、ナットは緩まず締結状態が保持されるのである。
Conventionally, bolts and nuts are used to fasten articles. For example, a mounting hole is provided in each of a pair of objects to be fastened, the mounting holes of both objects to be fastened are aligned, The nut is inserted into the shaft of the bolt and screwed into the shaft protruding from the other mounting hole.
Also, the washer is clamped between the bolt head and the object to be fastened, or the washer and washer are sandwiched between the nut and the object to be fastened. By urging the nut, the slope of the screw thread portion of the bolt and the slope of the screw thread portion of the nut are pressed against each other, closely contacting each other, and increasing the friction associated with the rotation of the nut. The state is maintained.

ところが、例えば、鉄道の軌道と枕木との締結の様に、振動に耐えねばならない物品の締結では、振動によるナットの緩みを避けることができず、適宜期間の経過毎に締め直しを余儀なくされ、設備の維持管理に手間がかかっていた。   However, for example, fastening of articles that must withstand vibration, such as fastening of railroad tracks and sleepers, it is not possible to avoid loosening of the nut due to vibration, and it is forced to retighten every time the period passes, It took time and effort to maintain the equipment.

本考案は、上記課題に鑑み、セルフタッピングボルトとナット体から成り、該ナット体に前記セルフタッピングボルトの軸部を捻じ込む下孔を貫設し、前記セルフタッピングボルトは、その軸部外周に螺旋条を突設すると共に、軸部先端側で螺旋条の始端側に前記下孔の内周に雌螺子を削成する切り刃を設けており、螺旋条の少なくとも始端側領域では、螺旋条谷部での軸部外径を前記下孔内径より小径にすると共に、螺旋条山部での軸部外径を始端側から他端側に従い徐々に大径に調製し、一方ナット体の下孔内径を螺旋条山部での軸部の最小外径以上で且つ最大外径より小さくすることによって、下孔に軸部を捻じ込み雌螺子を削成しつつ、軸部により下孔を押し広げさせ、拡張に抗する下孔の復元力にて軸部を締め付け、セルフタッピングボルトとナット体を一体化する。   In view of the above problems, the present invention is composed of a self-tapping bolt and a nut body, and a through hole for screwing the shaft portion of the self-tapping bolt is provided in the nut body, and the self-tapping bolt is formed on an outer periphery of the shaft portion. In addition to projecting a spiral strip, a cutting blade for cutting a female screw is provided on the inner periphery of the lower hole on the start end side of the spiral strip on the tip end side of the shaft portion. The shaft outer diameter at the trough is made smaller than the inner diameter of the lower hole, and the shaft outer diameter at the spiral ridge is gradually increased from the starting end side to the other end side. By making the inner diameter of the hole more than the minimum outer diameter of the shaft portion at the spiral ridge and smaller than the maximum outer diameter, the shaft portion is screwed into the lower hole and the female screw is cut, while the lower hole is pushed by the shaft portion. Self-tapping by tightening the shaft with the restoring force of the pilot hole that resists expansion To integrate the Guboruto and nut body.

又、ボルト体とセルフタッピングナットから成り、該セルフタッピングナットに前記ボルト体の軸部を捻じ込む雄螺子削成孔を貫設し、該雄螺子削成孔は、その内周に螺旋条を突設すると共に、雄螺子削成孔の一端側で螺旋条の始端側に前記ボルト体の軸部外周に雄螺子を削成する切り刃を設けており、螺旋条の少なくとも始端側領域では、螺旋条谷部での雄螺子削成孔内径を前記軸部外径より大径にする共に、螺旋条山部での雄螺子削成孔内径を始端側から他端側に従い徐々に小径に調製し、一方ボルト体の軸部外径を螺旋条山部での雄螺子削成孔の最小内径より大きく且つ最大内径以下にすることによって、雄螺子削成孔に軸部を捻じ込み雄螺子を削成しつつ、軸部により雄螺子削成孔を押し広げさせ、拡張に抗する雄螺子削成孔の復元力にて軸部を締め付け、ボルト体とセルフタッピングナットを一体化する様にして、上記課題を解決する。   Further, the self-tapping nut comprises a bolt body and a self-tapping nut is provided with a male screw cutting hole through which a shaft portion of the bolt body is screwed, and the male screw cutting hole has a spiral line on its inner periphery. In addition to projecting, at the one end side of the male thread cutting hole is provided a cutting blade for cutting the male screw on the outer periphery of the shaft portion of the bolt body on the start end side of the spiral line, at least at the start end side region of the spiral line, The inner diameter of the male screw cutting hole at the spiral ridge is made larger than the outer diameter of the shaft part, and the inner diameter of the male screw cutting hole at the spiral ridge is gradually reduced from the starting end side to the other end side. On the other hand, by setting the outer diameter of the shaft portion of the bolt body to be larger than the minimum inner diameter of the male screw cutting hole and not more than the maximum inner diameter at the spiral thread portion, the male screw is screwed into the male screw cutting hole. While cutting, the male screw cutting hole is pushed and expanded by the shaft, and the male screw cutting hole is restored to resist expansion Clamping the shaft in, in the manner to integrate the bolt body and the self-tapping nut, to solve the above problems.

要するに、実用新案登録請求の範囲の請求項1に記載の考案は、セルフタッピングボルトの軸部外周に設けた螺旋条の始端側に切り刃を設け、該始端側領域では、螺旋条谷部での軸部外径をナット体に貫設した下孔内径より小径にすると共に、螺旋条山部での軸部外径を始端側から他端側に従い徐々に大径に調製し、またナット体の下孔内径を螺旋条山部での軸部の最小外径以上で且つ最大外径より小さくしたので、下孔に軸部先端側を捻じ込むことで、切り刃により、下孔に雌螺子が削成でき、螺旋条山部での軸部外径が徐々に大径になることから、雌螺子を切り進むに従い、下孔は外方に徐々に押されて、僅かに拡張し、この拡張方向の力に抗して復元力が働き、雌螺子により軸部が求心方向に強く圧迫されて、セルフタッピングボルトとナット体が恰も一体化したかの如く固定される。
従って、セルフタッピングボルトとナット体の締結状態は強固に堅持されて緩まず、従前のボルトとナットによる締結の様な締め直しを不要にすることが出来る。
又、従前のボルトとナットによる締結は、通常は座金とワッシャーを使用し、ボルトの頭部とナット側の座金を被締結物に強く押し当てねば、ワッシャーの反力が弱く、ナット固定が不十分となってしまうため、往々にして締め付け過ぎ、被締結物が金属より脆弱な素材、例えば、木材、プラスチック等の場合、過度の締め付けにより、被締結物が損傷するおそれがあるが、本考案のものは、セルフタッピングボルトとナット体とが目的の位置で固定されて不動化することから、被締結物にセルフタッピングボルトの頭部とナット体をあまり強く押接させなくても良く、被締結物の損傷を回避することが出来る。
In short, the device described in claim 1 of the utility model registration claim is provided with a cutting blade on the start end side of the spiral strip provided on the outer periphery of the shaft portion of the self-tapping bolt. The outer diameter of the shaft is made smaller than the inner diameter of the pilot hole penetrating the nut body, and the outer diameter of the shaft at the spiral ridge is gradually increased from the starting end to the other end. Since the inner diameter of the lower hole is greater than or equal to the minimum outer diameter of the shaft portion at the spiral ridge and smaller than the maximum outer diameter, by screwing the tip end side of the shaft portion into the lower hole, a female thread is inserted into the lower hole by the cutting blade. Since the shaft outer diameter at the spiral streak gradually increases, the lower hole is gradually pushed outward and slightly expanded as the female screw is cut. The restoring force works against the force in the expansion direction, the shaft is strongly pressed in the centripetal direction by the female screw, and the self-tapping bolt Nut body is fixed as if they were integrated as if.
Therefore, the fastening state of the self-tapping bolt and the nut body is firmly held and does not loosen, and it is possible to eliminate the need for re-tightening such as fastening with the conventional bolt and nut.
Also, conventional fastening with bolts and nuts usually uses washers and washers. If the bolt head and the washer on the nut side are pressed firmly against the object to be fastened, the reaction force of the washer will be weak and the nut will not be fixed. However, if the material to be fastened is weaker than metal, such as wood or plastic, the material to be fastened may be damaged by excessive tightening. Since the self-tapping bolt and the nut body are fixed and immobilized at the target position, the head of the self-tapping bolt and the nut body do not need to be pressed too strongly against the object to be fastened. Damage to the fastener can be avoided.

例えば、螺旋条山部の突出丈を始端側から他端側まで一定にし、谷部での軸部外径を先端側から他端側に従い徐々に大径にすることのみによって、螺旋条山部での軸部外径を上記の様に調製すると、先端側での谷部外径が著しく細くなって、軸部先端側での抗折強度が低くなってしまうが、請求項2に記載の考案は、螺旋条山部の突出丈を調製する様にしたので、例えば、螺旋条谷部での軸部外径を軸部先端側から他端側まで一定にしたり、或いは、先端側と他端側の谷部での軸部外径の差を小さくすることが出来て、先端側での軸部の抗折強度を高くし、耐久性を確保することが出来る。   For example, only by making the protruding length of the spiral ridge portion constant from the start end side to the other end side, and gradually increasing the outer diameter of the shaft portion at the valley portion from the front end side to the other end side, the spiral ridge portion If the shaft outer diameter is adjusted as described above, the trough outer diameter on the tip end side becomes extremely thin, and the bending strength on the tip end side of the shaft portion becomes low. The idea is to adjust the protruding length of the spiral streak, so for example, the outer diameter of the shaft at the spiral streak is made constant from the front end side to the other end of the shaft section, The difference in the outer diameter of the shaft at the end valley can be reduced, the bending strength of the shaft at the tip can be increased, and the durability can be ensured.

請求項3に記載の考案は、螺旋条の始端側から他端側まで全領域において、螺旋条自体を切り刃と成し、螺旋条谷部での軸部外径をナット体の下孔内径より小径にすると共に、螺旋条山部での軸部外径を始端側から他端側に従い徐々に大径に調製したので、ナット体をセルフタッピングボルトの先端側から他端側まで、任意の位置まで、回転させつつ押し進めて雌螺子削成をすることが出来、どの位置からでも雌螺子削成を進めることで、常に下孔を外方に拡張する力と、これに抗する復元力とが働き、請求項1の考案同様、セルフタッピングボルトとナット体とを強固に堅持、固定することが出来る。
従って、セルフタッピングボルトの他端縁部に設けた頭部とナット体の両者の間隔を適宜調整して、両者に挟持させる被締結物の厚みに対応させ、様々な被締結物に対し適用させることが出来る。
In the invention according to claim 3, the spiral strip itself is formed as a cutting blade in the entire region from the start end side to the other end side of the spiral strip, and the shaft outer diameter in the spiral valley portion is defined as the inner diameter of the lower hole of the nut body. Since the outer diameter of the shaft portion at the spiral ridge portion was gradually increased from the starting end side to the other end side, the nut body was arbitrarily extended from the front end side to the other end side of the self-tapping bolt. It is possible to cut the female screw by pushing while rotating it to the position, and by always pushing the female screw from any position, the force that always expands the pilot hole outward and the restoring force that resists this As in the first aspect of the invention, the self-tapping bolt and the nut body can be firmly held and fixed.
Therefore, the distance between the head and the nut body provided at the other end edge of the self-tapping bolt is adjusted as appropriate so as to correspond to the thickness of the object to be clamped between the two and applied to various objects to be fastened. I can do it.

請求項4に記載の考案は、切欠溝にて螺旋条が分断され、且つ、軸部と下孔内周面との間に隙間が空くので、例えば、ナット体をより長くし、下孔をより長く(深く)し、雌螺子削成行程が長くなって、雌螺子の削成により発生する切り屑の量が多くなっても、切り屑を切欠溝から排出して、円滑に雌螺子削成をしながら軸部を下孔中に押し進めることが出来る。
又、ナット体をより長くし、セルフタッピングボルトとナット体とが噛み合う部分をより多くすることで、締結力を向上させることが出来る。
In the invention according to claim 4, since the spiral strip is divided by the notch groove and a gap is formed between the shaft portion and the inner peripheral surface of the lower hole, for example, the nut body is made longer and the lower hole is formed. Longer (deeper), longer female thread cutting process, and even if the amount of chips generated by female screw cutting increases, the chips are discharged from the notch groove to smoothly cut the female thread. The shaft portion can be pushed into the pilot hole while forming.
Further, the fastening force can be improved by making the nut body longer and increasing the number of portions where the self-tapping bolt and the nut body mesh.

請求項5に記載の考案は、セルフタッピングナットの下孔内周に設けた螺旋条の始端側に切り刃を設け、該始端側領域では、螺旋条谷部での雄螺子削成孔内径をボルト体軸部外径より大径にすると共に、螺旋条山部での雄螺子削成孔内径を始端側から他端側に従い徐々に小径に調製し、またボルト体の軸部外径を螺旋条山部での雄螺子削成孔の最小内径より大きく且つ最大内径以下にしたので、雄螺子削成孔の螺旋条の始端側から軸部を捻じ込むことで、切り刃により、軸部に雄螺子が削成でき、螺旋条山部での雄螺子削成孔内径が徐々に小径になることから、雄螺子を切り進むに従い、雄螺子削成孔は外方に徐々に押されて、僅かに拡張し、この拡張方向の力に抗して復元力が働き、雄螺子削成孔により雄螺子が求心方向に強く圧迫され、ボルト体とセルフタッピングナットとが恰も一体化したかの如く固定される。
従って、ボルト体とセルフタッピングナットの締結状態は強固に堅持されて緩まず、請求項1に記載の考案と同様に、従前のボルトとナットによる締結の様な締め直しを不要にすることが出来る。
又、請求項1に記載の考案と同様に、ボルト体とセルフタッピングナットとが目的の位置で固定されて不動化することから、被締結物にボルト体の頭部とセルフタッピングナットをあまり強く押接させなくても良く、被締結物の損傷を回避することが出来る。
The invention described in claim 5 is provided with a cutting blade on the start end side of the spiral strip provided on the inner periphery of the lower hole of the self-tapping nut, and in the start end region, the inner diameter of the male screw cutting hole in the spiral valley portion is set. The outer diameter of the bolt body shaft is made larger than the outer diameter of the bolt body, and the inner diameter of the male screw cutting hole in the spiral thread is gradually reduced from the starting end side to the other end side. Since it is larger than the minimum inner diameter of the male thread cutting hole in the ridge and below the maximum inner diameter, by screwing the shaft part from the start end side of the spiral thread of the male thread cutting hole, Since the male screw can be cut and the inner diameter of the male screw cutting hole at the spiral ridge gradually becomes smaller, the male screw cutting hole is gradually pushed outward as the male screw is cut, It expands slightly, the restoring force works against the force in the expansion direction, the male screw is strongly pressed in the centripetal direction by the male screw cutting hole, And the belt body and the self-tapping nut is fixed as if they were integrated as if.
Therefore, the fastening state of the bolt body and the self-tapping nut is firmly held and is not loosened, and it is possible to eliminate the need for re-tightening such as fastening with the conventional bolt and nut, as in the device of the first aspect. .
Further, as in the first aspect of the invention, the bolt body and the self-tapping nut are fixed and immobilized at the target position, so that the head of the bolt body and the self-tapping nut are made very strong to the object to be fastened. It is not necessary to make the pressing contact, and damage to the fastened object can be avoided.

例えば、螺旋条山部の突出丈を始端側から他端側まで一定にし、谷部での雄螺子削成孔内径を一端側から他端側に従い徐々に小径にすることのみによって、山部での雄螺子削成孔内径を上記の様に調製すると、一端側での谷部内径が著しく大きくなり、セルフタッピングナットの径方向の肉厚が薄くなって、一端側での強度が著しく低くなってしまうが、請求項6に記載の考案は、螺旋条山部の突出丈を調製する様にしたので、例えば、螺旋条谷部での雄螺子削成孔内径を一端側から他端側まで一定にしたり、或いは、一端側と他端側の谷部での雄螺子削成孔内径の差を小さくすることが出来て、一端側でのセルフタッピングナットの強度を高くし、耐久性を確保することが出来る。   For example, by making the protruding length of the spiral ridge part constant from the start end side to the other end side, and by gradually reducing the inner diameter of the male screw cutting hole at the valley part from one end side to the other end side, If the male screw cutting hole inner diameter is adjusted as described above, the inner diameter of the valley at one end side is significantly increased, the radial thickness of the self-tapping nut is reduced, and the strength at one end side is significantly reduced. However, since the invention according to claim 6 adjusts the protruding length of the spiral ridge, for example, the inner diameter of the male screw cutting hole in the spiral ridge is changed from one end side to the other end side. It can be made constant, or the difference between the inner diameters of the male screw cutting holes at the valleys on one end and the other end can be reduced, increasing the strength of the self-tapping nut on one end and ensuring durability I can do it.

請求項7に記載の考案は、螺旋条の始端側から他端側まで全領域において、螺旋条自体を切り刃と成し、螺旋条谷部での雄螺子削成孔内径をボルト体の軸部外径より大径にしたので、セルフタッピングナットをボルト体の先端側から他端側まで、任意の位置まで、回転させつつ押し進めて雄螺子削成をすることが出来、どの位置からでも雄螺子削成を進めることで、螺旋条山部での雄螺子削成孔内径が徐々に小径になる様に調製された領域では、常に雄螺子削成孔を外方に拡張する力と、これに抗する復元力とが働き、請求項5の考案同様、ボルト体とセルフタッピングナットを強固に堅持、固定することが出来る。
従って、ボルト体の他端縁部に設けた頭部とセルフタッピングナットの両者の間隔を適宜調整して、両者に挟持させる被締結物の厚みに対応させ、様々な被締結物に対し適用させることが出来る。
更に、螺旋条の始端側から他端側まで全領域において、螺旋条山部での雄螺子削成孔内径を始端側から他端側に従い徐々に小径に調製したので、全領域にて雄螺子削成孔の拡張と復元とによる締め付け力が働くため、締結力が向上し、ボルト体とセルフタッピングナットをより強固に固定することが出来る。
According to the seventh aspect of the present invention, in the entire region from the starting end side to the other end side of the spiral strip, the spiral strip itself is formed as a cutting blade, and the inner diameter of the male screw cutting hole in the spiral valley portion is set as the axis of the bolt body. Since the diameter is larger than the outer diameter of the part, the self-tapping nut can be pushed forward while rotating from the front end side to the other end side of the bolt body to any position, and the male screw can be cut from any position. In the region where the male screw cutting hole inner diameter at the spiral ridge is gradually reduced by proceeding with screw cutting, the force to always expand the male screw cutting hole outward, Thus, the bolt body and the self-tapping nut can be firmly held and fixed as in the invention of claim 5.
Therefore, the distance between the head provided on the other end edge of the bolt body and the self-tapping nut is appropriately adjusted to correspond to the thickness of the object to be clamped between the two, and applied to various objects to be fastened. I can do it.
Furthermore, since the inner diameter of the male screw cutting hole at the spiral thread portion was gradually reduced from the starting end side to the other end side in the entire region from the starting end side to the other end side of the spiral strip, Since the tightening force due to the expansion and restoration of the cutting hole works, the fastening force is improved and the bolt body and the self-tapping nut can be more firmly fixed.

請求項8に記載の考案は、切欠溝にて螺旋条が分断され、且つ、軸部外周面と雄螺子削成孔との間に隙間が空くので、例えば、セルフタッピングナットをより長くし、雄螺子削成孔をより長く(深く)し、雄螺子削成行程が長くなって、雄螺子の削成により発生する切り屑の量が多くなっても、切り屑を切欠溝から排出して、円滑に雄螺子削成をしながら軸部を雄螺子削成孔中に押し進めることが出来る。
又、セルフタッピングナットをより長くし、ボルト体とセルフタッピングナットが噛み合う部分をより多くすることで、締結力を向上させることが出来る等その実用的効果甚だ大である。
In the invention according to claim 8, the spiral strip is divided by the notch groove, and a gap is formed between the outer peripheral surface of the shaft portion and the male screw cutting hole. For example, the self-tapping nut is made longer, Even if the male screw cutting hole is made longer (deeper), the male screw cutting process becomes longer, and the amount of chips generated by the cutting of the male screw increases, the chips are discharged from the notch groove. The shaft portion can be pushed into the male screw cutting hole while smoothly cutting the male screw.
Further, the self-tapping nut is made longer and the number of portions where the bolt body and the self-tapping nut mesh with each other is increased, so that the fastening force can be improved.

以下、本考案の締結具につき、実施例を示し、詳細に説明する。
図1及び2に示す様に、実施例1の締結具は、セルフタッピングボルト1とナット体2から成り、該ナット体2にセルフタッピングボルト1の軸部3の先端側を捻じ込む下孔4を貫設している。
Examples of the fastener of the present invention will be described below in detail.
As shown in FIGS. 1 and 2, the fastener of Example 1 includes a self-tapping bolt 1 and a nut body 2, and a pilot hole 4 into which the tip end side of the shaft portion 3 of the self-tapping bolt 1 is screwed into the nut body 2. Is installed.

セルフタッピングボルト1は、その軸部3の外周に螺旋条5を突設すると共に、軸部3の先端側で螺旋条5の始端側に切り刃6を設けており、この切り刃6により、ナット体2の下孔4の内周に雌螺子を削成するのである。
又、螺旋条5の谷部7での軸部3の外径をナット体2の下孔4の内径より小径にすると共に、螺旋条5の始端側領域では、螺旋条5の山部8の突出丈を始端側から他端側に従い徐々に高くすることにより、螺旋条5の山部8での軸部3の外径を始端側から他端側に従い徐々に大径になる様に調製している。
The self-tapping bolt 1 has a spiral strip 5 projecting on the outer periphery of the shaft portion 3 and a cutting blade 6 provided on the leading end side of the spiral strip 5 on the tip side of the shaft portion 3. A female screw is cut on the inner periphery of the lower hole 4 of the nut body 2.
Further, the outer diameter of the shaft portion 3 at the valley portion 7 of the spiral strip 5 is made smaller than the inner diameter of the lower hole 4 of the nut body 2, and in the start end side region of the spiral strip 5, By gradually increasing the protruding length from the start end side to the other end side, the outer diameter of the shaft portion 3 at the peak portion 8 of the spiral strip 5 is adjusted to gradually increase from the start end side to the other end side. ing.

尚、上記切り刃6の形式は特に限定されるものではなく、雌螺子削成が可能であれば良く、例えば、ナット体2の形成素材よりも、高硬度の素材によりセルフタッピングボルト1を形成して、螺旋条5の全ての領域に切り刃6としての機能を付与しても良いし、始端側領域のみ高硬度の素材によるコーティングを施し、始端側領域のみ切り刃6としても良い。
又、図1中9は、軸部3の他端に設けた頭部であり、該頭部9は、従前のボルトの頭部と同様のものである。
The form of the cutting blade 6 is not particularly limited as long as the internal thread can be cut. For example, the self-tapping bolt 1 is formed of a material that is harder than the material of the nut body 2. Then, the function as the cutting blade 6 may be imparted to all regions of the spiral strip 5, or only the starting end region may be coated with a high hardness material, and only the starting end region may be used as the cutting blade 6.
Further, 9 in FIG. 1 is a head provided at the other end of the shaft portion 3, and the head 9 is the same as the head of a conventional bolt.

一方、ナット体2は、下孔4の内径を上記螺旋条5の山部8での軸部3の最小外径(つまり、螺旋条5の山部8の始端での軸部3の外径)以上で、且つ、最大外径(つまり、螺旋条5の山部8の他端側での軸部3の外径)より小さくしている。   On the other hand, the nut body 2 has the inner diameter of the pilot hole 4 set to the minimum outer diameter of the shaft portion 3 at the peak portion 8 of the spiral strip 5 (that is, the outer diameter of the shaft portion 3 at the start end of the peak portion 8 of the spiral strip 5). ) And the maximum outer diameter (that is, the outer diameter of the shaft portion 3 on the other end side of the peak portion 8 of the spiral strip 5).

実施例1の締結具の使用時には、図1に示す様に、被締結物W1、W2の取付孔H1、H2を位置合わせし、取付孔H1、H2にセルフタッピングボルト1の軸部3を挿通し、取付孔H1より突出した軸部3の先端にナット体2の下孔4を被せ、セルフタッピングボルト1又はナット体2を回転させ、セルフタッピングボルト1の切り刃6により、下孔4の内周に雌螺子を削成しつつ、下孔4に軸部3を捻じ込む。
すると、螺旋条5の山部8での軸部3の外径が徐々に大径になっていること、並びに、下孔4の内径が螺旋条5の山部8での軸部3の最小外径以上で、且つ、最大外径より小さく設定されていることから、雌螺子を切り進むに従い、下孔4は外方に徐々に押されて、僅かに拡張し、この拡張方向の力に抗して復元力が働き、雌螺子により軸部3が求心方向に強く圧迫されて、セルフタッピングボルト1にナット体2が固定される。
When using the fastener of Example 1, as shown in FIG. 1, the mounting holes H1 and H2 of the workpieces W1 and W2 are aligned, and the shaft portion 3 of the self-tapping bolt 1 is inserted into the mounting holes H1 and H2. Then, the lower end 4 of the nut body 2 is put on the tip of the shaft portion 3 protruding from the mounting hole H1, the self tapping bolt 1 or the nut body 2 is rotated, and the cutting edge 6 of the self tapping bolt 1 The shaft portion 3 is screwed into the lower hole 4 while a female screw is cut on the inner periphery.
Then, the outer diameter of the shaft portion 3 at the peak portion 8 of the spiral strip 5 is gradually increased, and the inner diameter of the lower hole 4 is the minimum of the shaft portion 3 at the peak portion 8 of the spiral strip 5. Since the outer diameter is set to be larger than the outer diameter and smaller than the maximum outer diameter, the lower hole 4 is gradually pushed outward and slightly expanded as the female screw is cut. A restoring force acts against the shaft, and the shaft 3 is strongly pressed in the centripetal direction by the female screw, and the nut body 2 is fixed to the self-tapping bolt 1.

次に、実施例2の締結具について説明する。
図3に示す様に、実施例2の締結具は、基本的には、上記実施例1の締結具と同様の構成を備え、図3中実施例1のものと同一構成要素については、同一品番を付して表しており、本実施例のものは、更に軸部3の外周面長手方向に切欠溝10、10a…を螺旋条5と交差する様に設けて、螺旋条5を分断している。
この締結具では、切欠溝10、10a…にて螺旋条5が分断され、且つ、軸部3と下孔4の内周面との間に隙間が空くことにより、雌螺子の削成により発生する切り屑が切欠溝10、10a…から排出される。
Next, the fastener of Example 2 will be described.
As shown in FIG. 3, the fastener of the second embodiment basically has the same configuration as the fastener of the first embodiment, and the same components as those of the first embodiment in FIG. In the present embodiment, notches 10, 10 a, etc. are further provided in the longitudinal direction of the outer peripheral surface of the shaft 3 so as to intersect the spiral 5, and the spiral 5 is divided. ing.
In this fastener, the spiral strip 5 is divided by the notch grooves 10, 10a, and a gap is formed between the shaft portion 3 and the inner peripheral surface of the lower hole 4, thereby generating the female screw. The chips to be discharged are discharged from the notch grooves 10, 10a.

前記の実施例1のものでは、使用するナット体2の下孔4の深さに合わせて、始端側領域のみ、軸部3の外径が上記の通りに調製されているが、螺旋条5の始端側から他端側まで全領域において、螺旋条5自体を切り刃6と成し、螺旋条5の谷部7での軸部3の外径をナット体2の下孔4の内径より小径にすると共に、螺旋条5の山部8での軸部3の外径を始端側から他端側に従い徐々に大径に調製する様にしても良いく、軸部3の外径を上記の様に調製することにより、ナット体2をセルフタッピングボルト1の先端側から他端側まで、任意の位置まで、回転させつつ押し進めて雌螺子削成が可能である。   In the thing of the said Example 1, according to the depth of the prepared hole 4 of the nut body 2 to be used, the outer diameter of the axial part 3 is prepared as above only in the area | region of the start end, but the spiral strip 5 In the entire region from the starting end side to the other end side, the spiral strip 5 itself forms a cutting blade 6, and the outer diameter of the shaft portion 3 at the trough portion 7 of the spiral strip 5 is larger than the inner diameter of the lower hole 4 of the nut body 2. In addition to reducing the diameter, the outer diameter of the shaft portion 3 at the peak portion 8 of the spiral strip 5 may be gradually increased from the starting end side to the other end side. By preparing as described above, the nut body 2 can be pushed forward while rotating from the front end side to the other end side of the self-tapping bolt 1 to an arbitrary position, thereby enabling female screw cutting.

次に、実施例3の締結具について説明する。
図4及び5に示す様に、実施例3の締結具は、ボルト体11とセルフタッピングナット12から成り、該セルフタッピングナット12にボルト体11の軸部13の先端側を捻じ込む雄螺子削成孔14を貫設している。
Next, the fastener of Example 3 will be described.
As shown in FIGS. 4 and 5, the fastener of the third embodiment includes a bolt body 11 and a self-tapping nut 12, and a male screw cutter that screws the tip side of the shaft portion 13 of the bolt body 11 into the self-tapping nut 12. The formation hole 14 is penetrated.

雄螺子削成孔14は、その内周に螺旋条15を突設すると共に、雄螺子削成孔14の一端側で螺旋条15の始端側に切り刃16を設けており、この切り刃16により、ボルト体11の軸部13の外周に雄螺子を削成するである。
又、螺旋条15の谷部17での雄螺子削成孔14の内径をボルト体11の軸部13の外径より大径にする共に、螺旋条15の始端側領域では、螺旋条15の山部18の突出丈を始端側から他端側に従い徐々に高くすることにより、螺旋条15の山部18での雄螺子削成孔14の内径を始端側から他端側に従い徐々に小径になる様に調製している。
The male screw cutting hole 14 has a spiral strip 15 projecting on the inner periphery thereof, and a cutting blade 16 is provided on one end side of the male screw cutting hole 14 on the start end side of the spiral strip 15. Thus, a male screw is cut on the outer periphery of the shaft portion 13 of the bolt body 11.
In addition, the inner diameter of the male thread cutting hole 14 at the valley portion 17 of the spiral strip 15 is made larger than the outer diameter of the shaft portion 13 of the bolt body 11, and in the start end region of the spiral strip 15, the spiral strip 15 By gradually increasing the protruding length of the peak portion 18 from the start end side to the other end side, the inner diameter of the male screw cutting hole 14 at the peak portion 18 of the spiral strip 15 is gradually decreased from the start end side to the other end side. It is prepared as follows.

尚、上記切り刃16の形式は特に限定されるものではなく、雄螺子削成が可能であれば良く、例えば、ボルト体11の形成素材よりも、高硬度の素材によりセルフタッピングナット12を形成して、螺旋条15の全ての領域に切り刃16としての機能を付与しても良いし、始端側領域のみ高硬度の素材によるコーティングを施し、始端側領域のみ切り刃16としても良い。
又、図4及び5中19は、軸部13の他端に設けた頭部であり、該頭部19は、従前のボルトの頭部と同様のものである。
The form of the cutting blade 16 is not particularly limited as long as the external thread can be cut. For example, the self-tapping nut 12 is formed of a material that is harder than the material of the bolt body 11. Then, the function as the cutting blade 16 may be imparted to all the regions of the spiral strip 15, or only the starting end region may be coated with a high hardness material, and only the starting end region may be used as the cutting blade 16.
4 and 5, reference numeral 19 denotes a head provided at the other end of the shaft portion 13. The head 19 is the same as the head of a conventional bolt.

一方、ボルト体11は、軸部13の外径を螺旋条15の山部18での雄螺子削成孔14の最小内径(つまり、螺旋条15の山部18の他端側での雄螺子削成孔14の内径)より大きく、且つ、最大内径(つまり、螺旋条15の山部18の始端での雄螺子削成孔14の内径)以下にしている。   On the other hand, in the bolt body 11, the outer diameter of the shaft portion 13 is set to the minimum inner diameter of the male screw cutting hole 14 in the peak portion 18 of the spiral strip 15 (that is, the male screw on the other end side of the peak portion 18 of the spiral strip 15). It is larger than the maximum inner diameter (that is, the inner diameter of the male screw cutting hole 14 at the starting end of the crest 18 of the spiral strip 15).

実施例3の締結具の使用時には、図5に示す様に、被締結物W1、W2の取付孔H1、H2を位置合わせし、取付孔H1、H2にボルト体11の軸部13を挿通し、取付孔H1より突出した軸部13の先端にセルフタッピングナット12の雄螺子削成孔14を被せ、ボルト体11又はセルフタッピングナット12を回転させ、セルフタッピングナット12の切り刃16により、軸部13の外周に雄螺子を削成しつつ、雄螺子削成孔14に軸部13を捻じ込む。
すると、螺旋条15の山部18での雄螺子削成孔14の内径が徐々に小径になっていること、並びに、軸部13の外径が螺旋条15の山部18での雄螺子削成孔14の最小内径より大きく、且つ、最大内径以下に設定されていることから、雄螺子を切り進むに従い、雄螺子削成孔14は外方に徐々に押されて、僅かに拡張し、この拡張方向の力に抗して復元力が働き、雄螺子削成孔14により雄螺子が求心方向に強く圧迫され、ボルト体11にセルフタッピングナット12が固定される。
When the fastener of Example 3 is used, as shown in FIG. 5, the mounting holes H1 and H2 of the workpieces W1 and W2 are aligned, and the shaft portion 13 of the bolt body 11 is inserted into the mounting holes H1 and H2. Then, the end of the shaft portion 13 protruding from the mounting hole H1 is covered with the male screw cutting hole 14 of the self-tapping nut 12, the bolt body 11 or the self-tapping nut 12 is rotated, and the cutting blade 16 of the self-tapping nut 12 The shaft portion 13 is screwed into the male screw cutting hole 14 while cutting the male screw on the outer periphery of the portion 13.
Then, the inner diameter of the male screw cutting hole 14 at the peak portion 18 of the spiral strip 15 is gradually reduced, and the outer diameter of the shaft portion 13 is the male screw cutting at the peak portion 18 of the spiral strip 15. Since it is set to be larger than the minimum inner diameter of the forming hole 14 and not more than the maximum inner diameter, the male screw cutting hole 14 is gradually pushed outward and slightly expanded as the male screw is cut and advanced. A restoring force acts against the force in the expansion direction, the male screw is strongly pressed in the centripetal direction by the male screw cutting hole 14, and the self-tapping nut 12 is fixed to the bolt body 11.

次に、実施例4の締結具について説明する。
図6に示す様に、実施例4の締結具は、基本的には、上記実施例3の締結具と同様の構成を備え、図6中実施例3のものと同一構成要素については、同一品番を付して表しており、本実施例のものは、更に雄螺子削成孔14の内周面深さ方向に切欠溝20、20a…を螺旋条15と交差する様に設けて、螺旋条15を分断している。
Next, the fastener of Example 4 will be described.
As shown in FIG. 6, the fastener of Example 4 basically has the same configuration as the fastener of Example 3 above, and the same components as those of Example 3 in FIG. In this embodiment, a notch groove 20, 20a... Is provided in the inner peripheral surface depth direction of the male screw cutting hole 14 so as to intersect with the spiral strip 15, Article 15 is divided.

この締結具では、切欠溝20、20a…にて螺旋条15が分断され、且つ、軸部13の外周面と雄螺子削成孔14との間に隙間が空くことにより、雄螺子の削成により発生する切り屑が切欠溝20、20a…から排出される。   In this fastener, the spiral thread 15 is divided by the notch grooves 20, 20a, and a gap is formed between the outer peripheral surface of the shaft portion 13 and the male screw cutting hole 14, whereby the male screw is cut. The chips generated by the above are discharged from the notch grooves 20, 20a.

前記の実施例3のものでは、始端側領域のみ、雄螺子削成孔14の内径が上記の通りに調製されているが、実施例4のものの様に、螺旋条15の始端側から他端側まで全領域において、螺旋条15自体を切り刃6と成し、螺旋条15の谷部17での雄螺子削成孔14の内径をボルト体11の軸部13の外径より大径にすると共に、螺旋条15の山部18での雄螺子削成孔14の内径を始端側から他端側に従い徐々に小径に調製する様にしても良い。
実施例4のものでは、雄螺子削成孔14の内径を上記の様に調製することにより、セルフタッピングナット12をボルト体11の先端側から他端側まで、任意の位置まで、回転させつつ押し進めて雄螺子削成が可能であり、また雄螺子削成孔14の全領域において、拡張と復元とによる締め付け力が働く。
In the example 3 described above, the inner diameter of the male screw cutting hole 14 is adjusted as described above only in the start end side region. However, like the example 4, the other end from the start end side of the spiral strip 15 is adjusted. In the entire region to the side, the spiral strip 15 itself is formed as the cutting blade 6, and the inner diameter of the male screw cutting hole 14 at the valley portion 17 of the spiral strip 15 is larger than the outer diameter of the shaft portion 13 of the bolt body 11. At the same time, the inner diameter of the male screw cutting hole 14 at the peak portion 18 of the spiral strip 15 may be gradually adjusted from the start end side to the other end side.
In the fourth embodiment, the self-tapping nut 12 is rotated from the front end side to the other end side of the bolt body 11 to an arbitrary position by adjusting the inner diameter of the male screw cutting hole 14 as described above. The male screw can be cut by being pushed forward, and the tightening force due to expansion and restoration works in the entire region of the male screw cutting hole.

本考案の実施例1の締結具の概略図である。It is the schematic of the fastener of Example 1 of this invention. 図1の要部拡大断面図である。It is a principal part expanded sectional view of FIG. 実施例2の締結具の概略図である。It is the schematic of the fastener of Example 2. FIG. 実施例3の締結具の概略図である。6 is a schematic view of a fastener according to Example 3. FIG. 実施例3の締結具の使用状態図である。It is a use condition figure of the fastener of Example 3. 実施例4の締結具の概略図である。It is the schematic of the fastener of Example 4.

符号の説明Explanation of symbols

1 セルフタッピングボルト
2 ナット体
3 軸部
4 下孔
5 螺旋条
6 切り刃
7 谷部
8 山部
10、10a… 切欠溝
11 ボルト体
12 セルフタッピングナット
13 軸部
14 雄螺子削成孔
15 螺旋条
16 切り刃
17 谷部
18 山部
19 頭部
20、20a… 切欠溝
DESCRIPTION OF SYMBOLS 1 Self tapping bolt 2 Nut body 3 Shaft part 4 Pilot hole 5 Spiral strip 6 Cutting blade 7 Valley part 8 Mountain part
10, 10a ... Notch groove
11 Bolt body
12 Self-tapping nut
13 Shaft
14 Male thread cutting hole
15 Spiral strip
16 cutting blade
17 Tanibe
18 Yamabe
19 head
20, 20a ... Notch groove

Claims (8)

セルフタッピングボルトとナット体から成り、該ナット体に前記セルフタッピングボルトの軸部を捻じ込む下孔を貫設し、前記セルフタッピングボルトは、その軸部外周に螺旋条を突設すると共に、軸部先端側で螺旋条の始端側に前記下孔の内周に雌螺子を削成する切り刃を設けており、螺旋条の少なくとも始端側領域では、螺旋条谷部での軸部外径を前記下孔内径より小径にすると共に、螺旋条山部での軸部外径を始端側から他端側に従い徐々に大径に調製し、一方ナット体の下孔内径を螺旋条山部での軸部の最小外径以上で且つ最大外径より小さくしたことを特徴とする締結具。   The self-tapping bolt is composed of a nut body, and a through-hole for screwing the shaft portion of the self-tapping bolt is penetrated through the nut body. A cutting blade for cutting a female screw on the inner periphery of the lower hole is provided on the leading end side of the spiral strip on the tip end side of the spiral strip, and at least in the starting end region of the spiral strip, the outer diameter of the shaft portion in the spiral valley portion is set. While making the diameter smaller than the inner diameter of the lower hole, the outer diameter of the shaft portion at the spiral thread portion is gradually adjusted from the starting end side to the other end side, while the inner diameter of the nut body is adjusted at the spiral thread portion. A fastener characterized by being not less than the minimum outer diameter of the shaft and smaller than the maximum outer diameter. 螺旋条山部の突出丈を始端側から他端側に従い徐々に高くすることにより、螺旋条山部での軸部外径を調製する様にしたことを特徴とする請求項1記載の締結具。   2. The fastener according to claim 1, wherein the projecting length of the spiral thread portion is gradually increased from the starting end side to the other end side to adjust the shaft outer diameter at the spiral thread portion. . 螺旋条の始端側から他端側まで全領域において、螺旋条自体を切り刃と成し、螺旋条谷部での軸部外径をナット体の下孔内径より小径にすると共に、螺旋条山部での軸部外径を始端側から他端側に従い徐々に大径に調製したことを特徴とする請求項1又は2記載の締結具。   In the entire region from the start end side to the other end side of the spiral strip, the spiral strip itself is formed as a cutting blade, and the outer diameter of the shaft portion at the spiral valley portion is made smaller than the inner diameter of the lower hole of the nut body. The fastener according to claim 1 or 2, wherein the outer diameter of the shaft portion is gradually increased from the starting end side to the other end side. 軸部の外周面長手方向に切欠溝を螺旋条と交差する様に設けて、螺旋条を分断したことを特徴とする請求項1、2又は3記載の締結具。   The fastener according to claim 1, 2, or 3, wherein a notch groove is provided in the longitudinal direction of the outer peripheral surface of the shaft portion so as to intersect with the spiral stripe, and the spiral stripe is divided. ボルト体とセルフタッピングナットから成り、該セルフタッピングナットに前記ボルト体の軸部を捻じ込む雄螺子削成孔を貫設し、該雄螺子削成孔は、その内周に螺旋条を突設すると共に、雄螺子削成孔の一端側で螺旋条の始端側に前記ボルト体の軸部外周に雄螺子を削成する切り刃を設けており、螺旋条の少なくとも始端側領域では、螺旋条谷部での雄螺子削成孔内径を前記軸部外径より大径にする共に、螺旋条山部での雄螺子削成孔内径を始端側から他端側に従い徐々に小径に調製し、一方ボルト体の軸部外径を螺旋条山部での雄螺子削成孔の最小内径より大きく且つ最大内径以下にしたことを特徴とする締結具。   The self-tapping nut is composed of a bolt body and a self-tapping nut, and a male screw cutting hole for screwing the shaft portion of the bolt body through the self-tapping nut is provided. In addition, a cutting blade for cutting the male screw is provided on the outer periphery of the shaft portion of the bolt body on the one end side of the male screw cutting hole and on the start end side of the bolt body. While making the male screw cutting hole inner diameter at the valley part larger than the shaft outer diameter, the male screw cutting hole inner diameter at the spiral thread portion is gradually adjusted from the starting end side to the other end side to gradually reduce the diameter, On the other hand, the fastener is characterized in that the outer diameter of the shaft portion of the bolt body is made larger than the minimum inner diameter of the male screw cutting hole in the spiral thread portion and less than the maximum inner diameter. 螺旋条山部の突出丈を始端側から他端側に従い徐々に高くすることにより、螺旋条山部での雄螺子削成孔内径を調製する様にしたことを特徴とする請求項5記載の締結具。   6. The male thread cutting hole inner diameter in the spiral thread portion is adjusted by gradually increasing the protruding length of the spiral thread portion from the start end side to the other end side. Fasteners. 螺旋条の始端側から他端側まで全領域において、螺旋条自体を切り刃と成し、螺旋条谷部での雄螺子削成孔内径をボルト体の軸部外径より大径にすると共に、螺旋条山部での雄螺子削成孔内径を始端側から他端側に従い徐々に小径に調製したことを特徴とする請求項5又は6記載の締結具。   In the entire region from the start end side to the other end side of the spiral strip, the spiral strip itself is formed as a cutting blade, and the inner diameter of the male screw cutting hole in the spiral valley portion is made larger than the outer diameter of the shaft portion of the bolt body. The fastener according to claim 5 or 6, wherein the inner diameter of the male thread cutting hole in the spiral thread portion is gradually reduced from the starting end side to the other end side. 雄螺子削成孔の内周面深さ方向に切欠溝を螺旋条と交差する様に設けて、螺旋条を分断したことを特徴とする請求項5、6又は7記載の締結具。   The fastener according to claim 5, 6 or 7, wherein a notch groove is provided so as to intersect with the spiral strip in the depth direction of the inner peripheral surface of the male screw cutting hole, and the spiral strip is divided.
JP2007009461U 2007-12-10 2007-12-10 Fastener Expired - Fee Related JP3139615U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016147852A1 (en) * 2015-03-17 2016-09-22 住友電装株式会社 Seal cover for electric equipment
CN111971431A (en) * 2018-01-15 2020-11-20 Lg电子株式会社 Washing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016147852A1 (en) * 2015-03-17 2016-09-22 住友電装株式会社 Seal cover for electric equipment
CN111971431A (en) * 2018-01-15 2020-11-20 Lg电子株式会社 Washing machine
CN111971431B (en) * 2018-01-15 2023-02-17 Lg电子株式会社 Washing machine

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