JP6334227B2

JP6334227B2 - Nut fastener and method of fastening nut with washer

Info

Publication number: JP6334227B2
Application number: JP2014072890A
Authority: JP
Inventors: 信輝緑川
Original assignee: 株式会社晃和
Priority date: 2014-03-31
Filing date: 2014-03-31
Publication date: 2018-05-30
Anticipated expiration: 2034-03-31
Also published as: JP2015193064A

Description

本発明は、ナット締着具及び座金付きナットの締着方法に関し、特に、緊結ボルトに螺着される座金付きナットの座金部を、木製構造材の表面に突出させることなく締着させるためのナット締着具及び座金付きナットの締着方法に関する。 TECHNICAL FIELD The present invention relates to a nut fastener and a method for fastening a nut with a washer, and in particular, to fasten a washer portion of a nut with a washer screwed to a fastening bolt without protruding onto the surface of a wooden structural material. The present invention relates to a nut fastener and a method for fastening a nut with a washer.

例えば木造の住宅建築物等の建物においては、鉄筋コンクリート製の基礎の上に、建物の骨組み構造を構成する木製構造材である土台を固定する場合、複数本のアンカーボルトを緊結ボルトとして、これのボルト部にナット部材を螺着することにより土台の上面に締着させて、土台を基礎に一体として接合する方法が採用されている。すなわち、アンカーボルトは、下部を基礎の中に埋設して、基礎の上端面からボルト部を上方に突出させた状態で取り付けらており、土台には、アンカーボルトの取り付け位置と対応する部分に、複数の貫通穴が形成されている。これらの貫通穴に、アンカーボルトのボルト部を挿通して、挿通したボルト部の上端部分にナット部材を螺着して土台の上面に締着させることによって、土台を基礎に固定するようになっている。 For example, in a building such as a wooden house building, when fixing a foundation, which is a wooden structural material that constitutes the framework structure of a building, on a reinforced concrete foundation, a plurality of anchor bolts are used as fastening bolts. A method is adopted in which a nut member is screwed onto a bolt part to be fastened to the upper surface of the base, and the base is integrally joined to the base. In other words, the anchor bolt is installed with the lower part embedded in the foundation and the bolt part protruding upward from the upper end surface of the foundation, and the base is attached to the part corresponding to the anchor bolt installation position. A plurality of through holes are formed. By inserting the bolt part of the anchor bolt into these through holes and screwing the nut member to the upper end part of the inserted bolt part and fastening it to the upper surface of the base, the base is fixed to the foundation. ing.

一方、近年、例えば木造の住宅建築物等においては、建物の高気密化や高断熱化が図られている。このため、例えば断熱材を土台の上に密着させて取り付ける必要があることから、土台の上面からアンカーボルトのボルト部やナット部材を突出させることなく土台を基礎に固定させて、断熱材を土台の上に密着させることを可能にする、土台の固定方法や固定具が種々開発されている（例えば、特許文献１、特許文献２参照）。 On the other hand, in recent years, for example, wooden houses and the like have been improved in airtightness and heat insulation of buildings. For this reason, for example, since it is necessary to attach the heat insulating material on the base, the base is fixed to the base without protruding the bolt part or the nut member of the anchor bolt from the upper surface of the base, and the heat insulating material is fixed to the base. Various methods and fixtures have been developed for fixing the base that can be brought into close contact with each other (see, for example, Patent Document 1 and Patent Document 2).

これらの特許文献に記載された土台の固定方法や固定具では、筒状ナット部と座金部とからなる座金付きナットの座金部や、座金付きナットを回転させて土台の上面に締着させる固定具（締着具）には、切削刃が設けられており、これらの切削刃によって土台の上面を切削しながら、座金付きナットを回転させつつ土台の貫通穴に向けて押し込むことで、筒状ナット部をアンカーボルトのボルト部に螺着させ、且つ土台の上面を切削することにより形成された座堀部の底面に座金部を締着させることによって、アンカーボルトのボルト部や座金付きナットを土台の上面から突出させることなく、土台を基礎に固定できるようになっている。 In the base fixing method and fixture described in these patent documents, a washer part of a nut with a washer composed of a cylindrical nut part and a washer part, or a fixing that rotates the nut with a washer and fastens it to the upper surface of the base. The tool (fastening tool) is provided with a cutting blade. By cutting the top surface of the base with these cutting blades and rotating the nut with a washer and pushing it toward the through hole of the base, the cylindrical shape is obtained. By screwing the nut part to the bolt part of the anchor bolt and fastening the washer part to the bottom surface of the washer part formed by cutting the upper surface of the base, the bolt part of the anchor bolt and the nut with washer are fixed to the base. The base can be fixed to the foundation without protruding from the upper surface of the base.

特許第３７４０２４６号公報Japanese Patent No. 3740246 特許第４０３６５５１号公報Japanese Patent No. 4036551

しかしながら、特許文献１や特許文献２に記載された土台の固定方法や固定具では、土台の上面に形成された座堀部の底面に座金付きナットが締着されるまで、切削刃が座金部の下面から突出したままの状態となっているので、座金付きナットを十分に締め付けて締着させた後においても、切削刃から離れた部分においては、座堀部の底面と座金部の下面との間には僅かな隙間が生じていることになる。また特に、座金付きナットを回転させて締着させる締着具に、座金部の下面から突出する切削刃が設けられている場合には、締着具を切削刃と共に座金付きナットから取り外した際に、座堀部の底面と座金部の下面との間には、略全体に亘って隙間が生じることになる。座堀部の底面と座金部の下面との間に隙間が生じていると、座金付きナットの土台への締着による引張り力（テンション）を、アンカーボルトに十分に付与することができなくなって、例えば土台が痩せた際に、緩みを発生させる要因となる。 However, in the fixing method and fixture of the base described in Patent Document 1 and Patent Document 2, the cutting blade of the washer portion is fixed until the nut with the washer is fastened to the bottom surface of the washer portion formed on the top surface of the base. Since it is still protruding from the lower surface, even after the nut with washer is sufficiently tightened and tightened, in the part away from the cutting blade, it is between the bottom surface of the washer and the lower surface of the washer. In this case, a slight gap is generated. In particular, when the fastening tool that rotates and fastens the nut with the washer is provided with a cutting blade that protrudes from the lower surface of the washer part, when the fastening tool is removed from the nut with the washer together with the cutting blade. In addition, a gap is formed over substantially the entire area between the bottom surface of the washer portion and the lower surface of the washer portion. If there is a gap between the bottom surface of the washer part and the lower surface of the washer part, it will not be possible to sufficiently apply the tension force (tension) by fastening the nut with the washer to the base, For example, it becomes a factor that causes loosening when the foundation is thin.

本発明は、土台等の木製構造材の表面に形成された座堀部に座金付きナットを締着させた際に、座堀部の底面と座金部の下面とを隙間なく密着させることを可能にして、アンカーボルト等の緊結ボルトに十分な引張り力を付与することのできるナット締着具及び座金付きナットの締着方法を提供することを目的とする。 The present invention makes it possible to closely contact the bottom surface of the washer part and the lower surface of the washer part without any gap when the nut with the washer is fastened to the washer part formed on the surface of the wooden structure material such as the base. An object of the present invention is to provide a nut fastening tool and a method for fastening a nut with a washer that can give a sufficient tensile force to a fastening bolt such as an anchor bolt.

本発明は、木製構造材に貫通形成された貫通穴に配設された緊結ボルトに螺着される、筒状ナット部と座金部とからなる座金付きナットの座金部を、木製構造材の表面に突出させることなく締着させるための、回転基盤部を備えるナット締着具であって、前記座金付きナットには、前記座金部に、前記回転基盤部を係合させる貫通係合部が複数箇所に形成されており、前記回転基盤部には、前記座金部が装着される側の下面部から下方に突出して、前記貫通係合部に各々係合される複数の切削係合突起が、前記貫通係合部と対応する位置に設けられていると共に、前記座金部が装着される側と反対側の上面部に、インパクトレンチ等の回転工具に連結される連結係合部が設けられており、且つ前記回転基盤部には、前記下面部における前記座金部の装着領域の外周部分から下方に突出して、前記木製構造材の表面に当接させる当接凸部が、周方向に連続して、又は断続して設けられており、前記切削係合突起は、前記座金部の前記貫通係合部の貫通長さよりも長い長さで突出していることで、前記貫通係合部に挿入係合された際に、先端の切削刃が、前記座金部の下面よりも下方に突出可能となっており、前記当接凸部は、前記切削係合突起よりも短い長さで突出していることで、前記当接凸部の先端と前記切削係合突起の先端との間に、前記座金部の厚さ以上の高低差が保持されているナット締着具を提供することにより、上記目的を達成したものである。 The present invention relates to a washer portion of a nut with a washer that is screwed into a tightening bolt disposed in a through hole that is formed through a wooden structure material. A nut fastener having a rotating base portion for fastening without protruding to the nut, wherein the nut with the washer has a plurality of through engagement portions for engaging the rotating base portion with the washer portion. A plurality of cutting engagement protrusions that protrude downward from the lower surface portion on the side on which the washer portion is mounted and are respectively engaged with the through engagement portions. A connecting engagement portion connected to a rotary tool such as an impact wrench is provided at a position corresponding to the penetrating engagement portion, and an upper surface portion opposite to the side on which the washer portion is mounted. And the rotary base portion includes the seat on the lower surface portion. A contact protrusion that protrudes downward from an outer peripheral portion of the mounting region of the portion and contacts the surface of the wooden structure material is provided continuously or intermittently in the circumferential direction, and the cutting engagement protrusion Is protruded by a length longer than the penetration length of the through-engagement portion of the washer portion, and when inserted into the penetration engagement portion, the cutting blade at the tip of the washer portion It is possible to project below the lower surface, and the contact projection protrudes with a shorter length than the cutting engagement projection, so that the tip of the contact projection and the cutting engagement projection The above object is achieved by providing a nut fastener in which a height difference equal to or greater than the thickness of the washer portion is maintained between the tip and the tip.

本発明のナット締着具は、前記回転基盤部が、前記座金付きナットの座金部よりも一回り小さな平面形状を備えるように形成されており、前記当接凸部は、前記回転基盤部よりも外側に張り出した状態で設けられていることが好ましい。 The nut fastener of the present invention is formed such that the rotary base portion has a planar shape that is slightly smaller than the washer portion of the nut with the washer, and the contact convex portion is formed from the rotary base portion. Is preferably provided in a state of projecting outward.

また、本発明は、木製構造材に貫通形成された貫通穴に配設された緊結ボルトに螺着される、筒状ナット部と座金部とからなる座金付きナットの座金部を、ナット締着具を用いて、木製構造材の表面に突出させることなく締着させるための座金付きナットの締着方法であって、前記座金付きナットには、前記座金部に、前記ナット締着具の回転基盤部を係合させる貫通係合部が複数箇所に形成されており、前記ナット締着具は、インパクトレンチ等の回転工具に連結される連結係合部と、前記回転工具による駆動力によって回転する前記回転基盤部とを備えており、該回転基盤部には、前記座金部が装着される側の下面部から下方に突出して、前記貫通係合部に各々係合される複数の切削係合突起が、前記貫通係合部と対応する位置に設けられており、前記切削係合突起を前記貫通係合部に挿入係合して、前記座金部を前記回転基盤部に装着した状態で、前記座金部の下面から下方に突出させた、前記回転基盤部の前記切削係合突起の先端の切削刃によって、前記木製構造材の表面を切削しながら、前記座金付きナットを回転させつつ前記筒状ナット部を前記緊結ボルトに螺着させる工程と、前記座金部が前記木製構造材の表面から突出しなくなる深さまで前記切削刃によって前記木製構造材の表面を切削した後に、前記回転基盤部の前記座金部が装着される側の下面部における、前記座金部の装着領域の外周部分から下方に突出して、周方向に連続して、又は断続して設けられた当接凸部を、前記木製構造材の表面に当接させることで、或いは前記ナット締着具が連結される前記回転工具の外周面から延設して取り付けられたストッパー部を、前記木製構造材の表面に当接させることで、又は前記回転基盤部の下面を前記木製構造材の表面に当接さてストッパー部として機能させることで、前記回転基盤部の下方への移動をストップさせて、前記座金付きナットのみを下方に移動させながら、前記座金付きナットを回転させつつ前記筒状ナット部を前記緊結ボルトに螺着させることで、前記座金部を、前記木製構造材の表面から突出させることなく、前記切削刃によって切削された座堀部の底面に締着させる工程とを含む座金付きナットの締着方法を提供することにより、上記目的を達成したものである。 Further, the present invention provides a nut fastening for a washer portion of a nut with a washer comprising a cylindrical nut portion and a washer portion, which is screwed to a fastening bolt disposed in a through hole formed through a wooden structure material. A method for fastening a nut with a washer for fastening without protruding onto the surface of a wooden structural material using a tool, wherein the nut with the washer is rotated on the washer part. A plurality of through-engaging portions for engaging the base portion are formed, and the nut fastener is rotated by a connecting engagement portion connected to a rotary tool such as an impact wrench and a driving force by the rotary tool. A plurality of cutting members that protrude downward from a lower surface portion on a side on which the washer portion is mounted and are respectively engaged with the through-engaging portions. A mating protrusion is provided at a position corresponding to the penetrating engagement portion. The rotary base projecting downwardly from the lower surface of the washer part in a state in which the cutting engagement protrusion is inserted into and engaged with the penetration engaging part and the washer part is mounted on the rotary base part. A step of screwing the cylindrical nut portion to the fastening bolt while rotating the nut with a washer while cutting the surface of the wooden structure material by a cutting blade at the tip of the cutting engagement protrusion of the portion; and After the surface of the wooden structure material is cut by the cutting blade to a depth at which the washer portion does not protrude from the surface of the wooden structure material, the washer portion on the lower surface portion of the rotating base portion on the side where the washer portion is mounted By projecting downward from the outer peripheral portion of the mounting area of the mounting area, contacting the surface of the wooden structure material with a contact convex portion provided continuously or intermittently in the circumferential direction, or tightening the nut Said tool is connected A stopper part that is extended and attached from the outer peripheral surface of the rolling tool is brought into contact with the surface of the wooden structure material, or the lower surface of the rotating base part is brought into contact with the surface of the wooden structure material to thereby stop the stopper part. The cylindrical nut portion is turned into the tightening bolt while rotating the nut with the washer while moving only the nut with the washer downward. A method of fastening a nut with a washer, including a step of fastening the washer part to a bottom surface of a washer part cut by the cutting blade without causing the washer part to protrude from the surface of the wooden structure material by screwing. By providing this, the above-mentioned object is achieved.

本発明のナット締着具又は座金付きナットの締着方法によれば、土台等の木製構造材の表面に形成された座堀部に座金付きナットを締着させた際に、座堀部の底面と座金部の下面とを隙間なく密着させることを可能にして、アンカーボルト等の緊結ボルトに十分な引張り力を付与することができる。 According to the nut fastening tool or the method of fastening a nut with a washer according to the present invention, when a nut with a washer is fastened to a washer formed on the surface of a wooden structure material such as a base, It is possible to closely contact the lower surface of the washer part without a gap, and a sufficient tensile force can be applied to a fastening bolt such as an anchor bolt.

（ａ）、（ｂ）は、本発明の好ましい一実施形態に係るナット締着具及び座金付きナットの締着方法を説明する略示斜視図である。(A), (b) is the schematic perspective view explaining the fastening method of the nut fastener and the nut with a washer which concern on preferable one Embodiment of this invention. （ａ）〜（ｅ）は、座金付きナットの締着方法の各工程の説明図である。(A)-(e) is explanatory drawing of each process of the fastening method of a nut with a washer. 座金付きナットを例示する、（ａ）は（ｂ）のＡ−Ａに沿った縦断面図、（ｂ）は（ａ）を下方から視た下面図である。A nut with a washer is illustrated, (a) is a longitudinal sectional view taken along line AA in (b), and (b) is a bottom view of (a) viewed from below. ナット締着具の他の好ましい形態を例示する説明図である。It is explanatory drawing which illustrates the other preferable form of a nut fastener. 他の座金付きナットの締着方法を例示する説明図である。It is explanatory drawing which illustrates the fastening method of the nut with another washer. （ａ）〜（ｃ）は、他の座金付きナットの締着方法を例示する説明図である。(A)-(c) is explanatory drawing which illustrates the fastening method of the nut with another washer.

本発明の好ましい一実施形態に係るナット締着具１０及び座金付きナットの締着方法は、図１及び図２（ａ）〜（ｅ）に示すように、例えば木造の住宅建築物において、骨組み構造を構成する木製構造材として、例えば鉄筋コンクリート製の基礎３０の上に設置される土台３１を、緊結ボルトである複数本のアンカーボルト３２を用いて固定する際に、基礎３０の上端面から上方に突出させたアンカーボルト３２のボルト部３２ａに螺着した座金付きナット２０を、土台３１の上面に強固に且つ安定した状態で締着させるための器具や方法として用いられる。すなわち、本実施形態では、アンカーボルト３２は、下部を基礎３０の中に埋設して、基礎３０の上端面からボルト部３２ａを上方に突出させた状態で取り付けらており、土台３１には、アンカーボルト３２の取り付け位置と対応する部分に、複数の貫通穴３１ａが形成されている。これらの貫通穴３１ａに、アンカーボルト３２のボルト部３２ａを挿通し、挿通したボルト部３２ａの上端部分に座金付きナット２０を螺着して土台３１の上面に締着させることによって、基礎３０の上端面に土台３１を固定するようになっている。 As shown in FIGS. 1 and 2 (a) to 2 (e), a nut fastening tool 10 and a nut with a washer according to a preferred embodiment of the present invention are framed, for example, in a wooden residential building. As a wooden structural material constituting the structure, for example, when a base 31 installed on a reinforced concrete foundation 30 is fixed using a plurality of anchor bolts 32 which are tightening bolts, the upper side of the foundation 30 is upward. The nut 20 with a washer screwed to the bolt part 32a of the anchor bolt 32 protruded to the top is used as a tool or method for fastening the nut 31 with the washer firmly and stably on the upper surface of the base 31. That is, in this embodiment, the anchor bolt 32 is attached in a state where the lower portion is embedded in the foundation 30 and the bolt portion 32a protrudes upward from the upper end surface of the foundation 30. A plurality of through holes 31 a are formed at portions corresponding to the attachment positions of the anchor bolts 32. The bolt portion 32a of the anchor bolt 32 is inserted into these through holes 31a, and the nut 20 with a washer is screwed onto the upper end portion of the inserted bolt portion 32a to be fastened to the upper surface of the base 31. A base 31 is fixed to the upper end surface.

また、本実施形態では、ナット締着具１０に設けられた切削係合突起１２，１３の先端の切削刃１２ａ，１３ａを、座金付きナット２０の座金部２１の下面から突出させた状態で、座金付きナット２０を回転させつつ、アンカーボルト３２のボルト部３２ａが配設された土台３１の貫通穴３１ａに向けて押し込むことで、座金付きナット２０をボルト部３２ａに螺着させながら土台３１の上面に座堀部３３を形成すると共に、形成した座堀部３３において、座金付きナット２０を、土台３１の上面から突出させることなく土台３１に締着させるようになっている。さらに、本実施形態では、座金部２１を座堀部３３の底面３３ａに強固に密着させた状態で、座金付きナット２０を土台３１に締着させることを可能にして、アンカーボルトに十分な引張り力（テンション）を付与した状態で、基礎３０の上端面に土台３１を固定できるようになっている。 In the present embodiment, the cutting blades 12a and 13a at the tips of the cutting engagement protrusions 12 and 13 provided on the nut fastener 10 are protruded from the lower surface of the washer portion 21 of the nut 20 with a washer. By rotating the nut 20 with a washer toward the through hole 31a of the base 31 where the bolt part 32a of the anchor bolt 32 is rotated, the nut 20 with the washer is screwed into the bolt part 32a while being screwed into the bolt part 32a. A counterbore part 33 is formed on the upper surface, and the nut 20 with a washer is fastened to the base 31 without protruding from the upper surface of the base 31 in the formed hole 33. Further, in the present embodiment, the nut 20 with a washer can be fastened to the base 31 in a state where the washer portion 21 is firmly attached to the bottom surface 33a of the washer portion 33, and a sufficient tensile force is applied to the anchor bolt. The base 31 can be fixed to the upper end surface of the foundation 30 with (tension) applied.

そして、本実施形態のナット締着具１０は、図１及び図２（ａ）〜（ｅ）に示すように、土台３１に貫通形成された貫通穴３１ａに配設されたアンカーボルト３２に螺着される、筒状ナット部２２と座金部２１とからなる座金付きナット２０の座金部２１を、土台３１の上面（表面）に突出させることなく締着させるための、回転基盤部１１を備える締付け用の器具であって、座金付きナット２０には、座金部２１に、回転基盤部１１を係合させる貫通係合部２３，２４が複数箇所に形成されており、回転基盤部１１には、座金部２１が装着される側の下面部から下方に突出して、貫通係合部２３，２４に各々係合される複数の切削係合突起１２，１３が、貫通係合部２３，２４と対応する位置に設けられていると共に、座金部２１が装着される側と反対側の上面部に、インパクトレンチ等の回転工具５０（図７参照）に連結される連結係合部１４が設けられている。 The nut fastener 10 of the present embodiment is screwed onto the anchor bolt 32 disposed in the through hole 31a formed through the base 31 as shown in FIGS. 1 and 2A to 2E. The rotating base part 11 is provided for fastening the washer part 21 of the nut 20 with a washer comprising the cylindrical nut part 22 and the washer part 21 to be attached without protruding onto the upper surface (surface) of the base 31. The nut 20 with a washer is formed with a plurality of through-engaging portions 23 and 24 for engaging the rotating base portion 11 with the washer portion 21. The plurality of cutting engagement protrusions 12 and 13 that protrude downward from the lower surface portion on the side on which the washer portion 21 is mounted and are respectively engaged with the through engagement portions 23 and 24 are connected to the through engagement portions 23 and 24. It is provided at the corresponding position and the washer 21 is mounted. That the upper surface of the side opposite to the side, coupling engagement portion 14 is provided which is connected to the rotary tool 50 such as an impact wrench (see Fig. 7).

また、回転基盤部１１には、下面部における座金部２１の装着領域の外周部分から下方に突出して、土台３１の上面（表面）に当接させる当接凸部１５が、周方向に連続して、又は断続して設けられており、切削係合突起１２，１３は、座金部２１の貫通係合部２３，２４の貫通長さよりも長い長さで突出していることで、貫通係合部２３，２４に挿入係合された際に、先端の切削刃１２ａ，１３ａが、座金部２１の下面よりも下方に突出可能となっており、当接凸部１５は、切削係合突起１２，１３よりも短い長さで突出していることで、当接凸部１５の先端と切削係合突起１２，１３の先端との間に、座金部２１の厚さ以上の高低差が保持されている。 In addition, the rotating base portion 11 has a contact convex portion 15 that protrudes downward from the outer peripheral portion of the mounting region of the washer portion 21 on the lower surface portion and contacts the upper surface (front surface) of the base 31 in the circumferential direction. Or the cutting engagement protrusions 12 and 13 are projected with a length longer than the penetration length of the penetration engagement portions 23 and 24 of the washer portion 21. When inserted and engaged with 23 and 24, the cutting blades 12a and 13a at the tip can protrude downward from the lower surface of the washer portion 21, and the contact convex portion 15 is formed by the cutting engagement protrusions 12 and By projecting with a length shorter than 13, a height difference equal to or greater than the thickness of the washer 21 is maintained between the tip of the contact projection 15 and the tips of the cutting engagement protrusions 12 and 13. .

なお、上述の記載内容及び後述する記載内容おいて、ナット締着具１０の回転基盤部１１の下面や、座金付きナット２０の座金部２１の下面は、ナット締着具１０や座金付きナット２０を緊結ボルト３２に向けて押し込む際に、木製構造材３１と対向させる側の面を意味するものであり、例えば座金付きナット２０を木製構造材３１の下面に締着させる場合には、回転基盤部１１の上面や座金付きナット２０の上面を、切削係合突起１２，１３や切削刃１２ａ，１３ａが突出する側の面である下面とすることができる。 In addition, in the above-mentioned description content and the description content described later, the bottom surface of the rotating base portion 11 of the nut fastener 10 and the bottom surface of the washer portion 21 of the nut 20 with washer are the nut fastener 10 and the nut 20 with washer. This means the surface on the side facing the wooden structural member 31 when the nut is pushed toward the fastening bolt 32. For example, when the nut 20 with a washer is fastened to the lower surface of the wooden structural member 31, the rotating base The upper surface of the portion 11 and the upper surface of the nut 20 with washer can be the lower surface that is the surface on which the cutting engagement protrusions 12 and 13 and the cutting blades 12a and 13a protrude.

そして、本実施形態の座金付きナットの締着方法は、土台３１に貫通形成された貫通穴３１ａに配設されたアンカーボルト３２のボルト部３２ａに螺着される、筒状ナット部２２と座金部２１とからなる座金付きナット２０の座金部２１を、ナット締着具１０を用いて、土台３１の上面（表面）に突出させることなく締着させるための締着方法であって、座金付きナット２０には、座金部２１に、ナット締着具１０の回転基盤部１１を係合させる貫通係合部２３，２４が複数箇所に形成されており、ナット締着具１０は、インパクトレンチ等の回転工具５０（図７参照）に連結される連結係合部１４と、回転工具５０による駆動力によって回転する回転基盤部１１とを備えており、回転基盤部１１には、座金部２１が装着される側の下面部から下方に突出して、貫通係合部２３，２４に各々係合される複数の切削係合突起１２，１３が、貫通係合部２３，２４と対応する位置に設けられており、切削係合突起１２，１３を貫通係合部２３，２４に挿入係合して、座金部２１を回転基盤部１１に装着した状態で（図２（ａ）、（ｂ）参照）、座金部２１の下面から下方に突出させた、回転基盤部１１の切削係合突起１２の先端の切削刃１２ａによって、土台３１の上面を切削しながら、座金付きナット２０を回転させつつ筒状ナット部２２をアンカーボルト３２のボルト部３２ａに螺着させる工程と（図２（ｂ）、（ｃ）参照）、座金部２１が土台３１の上面から突出しなくなる深さまで切削刃１２ａによって土台３１の上面を切削した後に（図２（ｃ）参照）、回転基盤部１１の下方への移動をストップさせて、座金付きナット２０のみを下方に移動させながら、座金付きナット２０を回転させつつ筒状ナット部２２をアンカーボルト３２のボルト部３２ａに螺着させることで、座金部２１を、土台３１の上面から突出させることなく、切削刃１２ａ、１３ａによって切削された座堀部３３の底面３３ａに締着させる工程とを含んでいる（図２（ｄ）、（ｅ）参照）。 And the fastening method of the nut with a washer of this embodiment is the cylindrical nut part 22 and the washer which are screwed into the bolt part 32a of the anchor bolt 32 disposed in the through hole 31a formed through the base 31. A fastening method for fastening a washer part 21 of a nut 20 with a washer comprising a part 21 without protruding onto the upper surface (front surface) of a base 31 using a nut fastening tool 10. The nut 20 is formed with a plurality of through-engaging portions 23 and 24 for engaging the rotating base portion 11 of the nut fastener 10 with the washer portion 21. The nut fastener 10 is an impact wrench or the like. The rotating engagement part 14 is connected to the rotating tool 50 (see FIG. 7), and the rotating base part 11 is rotated by the driving force of the rotating tool 50. The rotating base part 11 includes a washer part 21. The bottom surface of the side to be installed A plurality of cutting engagement protrusions 12 and 13 that protrude downward and are respectively engaged with the through engagement portions 23 and 24 are provided at positions corresponding to the through engagement portions 23 and 24. 12 and 13 are inserted and engaged with the through-engaging portions 23 and 24, and the washer portion 21 is mounted on the rotary base portion 11 (see FIGS. 2A and 2B), from the lower surface of the washer portion 21. The cylindrical nut portion 22 is fixed to the anchor bolt 32 while rotating the nut 20 with washer while the upper surface of the base 31 is being cut by the cutting blade 12a at the tip of the cutting engagement protrusion 12 of the rotary base portion 11 protruding downward. And a step of screwing the bolt 31a to the bolt portion 32a (see FIGS. 2B and 2C), after cutting the upper surface of the base 31 with the cutting blade 12a to a depth at which the washer portion 21 does not protrude from the upper surface of the base 31 (see FIG. 2 (see c)), under the rotating base 11 The cylindrical nut portion 22 is screwed to the bolt portion 32a of the anchor bolt 32 while rotating the nut 20 with the washer while moving the nut 20 with the washer downward and the nut 20 with the washer. 21 is fastened to the bottom surface 33a of the pocket portion 33 cut by the cutting blades 12a and 13a without protruding from the upper surface of the base 31 (see FIGS. 2D and 2E). .

さらに、本実施形態では、座金部２１が土台３１の上面（表面）から突出しなくなる深さまで切削刃１２ａ，１３ａによって土台３１の表面を切削した後に、回転基盤部１１の座金部２１が装着される側の下面部における、座金部２１の装着領域の外周部分から下方に突出して、周方向に連続して、又は断続して設けられた当接凸部１５を、土台３１の上面に当接させることで、回転基盤部１１の下方への移動をストップさせるようになっている。 Furthermore, in this embodiment, after the surface of the base 31 is cut by the cutting blades 12a and 13a to a depth at which the washer portion 21 does not protrude from the upper surface (surface) of the base 31, the washer portion 21 of the rotary base portion 11 is mounted. The abutment convex portion 15 that protrudes downward from the outer peripheral portion of the mounting region of the washer portion 21 on the lower surface portion of the side and is provided continuously or intermittently in the circumferential direction is brought into contact with the upper surface of the base 31. Thus, the downward movement of the rotary base portion 11 is stopped.

本実施形態では、図１（ａ）、（ｂ）に示すように、土台３１が固定される鉄筋コンクリート製の基礎３０は、例えばべた基礎の立上り部であって、鉄筋が配筋された型枠の内部にコンクリートを打設することによって、容易に形成することができる。型枠を組み付ける際に、基礎３０の延設方向に所定のピッチで複数のアンカーボルト３２を配置することで、打設されたコンクートにアンカーボルト３２の下部を埋設させた状態で、ボルト部３２ａが、基礎３０の上端面から上方に突出して、所定の間隔をおいて複数箇所に取り付けられる。これらのアンカーボルト３２のボルト部３２ａは、基礎３０の上端面から、土台３１の高さと同じか、又はこれよりも僅かに低い高さで突出して設けられている。これによって、ボルト部３２ａを貫通穴３１ａに挿通して、土台３１を基礎３０の上端面に設置した際に、ボルト部３２ａの先端が、土台３１の上面から上方に突出しないようになっている。 In this embodiment, as shown in FIGS. 1A and 1B, the foundation 30 made of reinforced concrete to which the base 31 is fixed is, for example, a rising portion of a solid foundation, and the formwork in which the reinforcing bars are arranged. It can be easily formed by placing concrete inside. When assembling the formwork, a plurality of anchor bolts 32 are arranged at a predetermined pitch in the extending direction of the foundation 30 so that the lower portion of the anchor bolt 32 is embedded in the placed concrete, and the bolt portion 32a. However, it protrudes upward from the upper end surface of the foundation 30, and is attached to a plurality of locations at predetermined intervals. The bolt portions 32 a of the anchor bolts 32 are provided so as to protrude from the upper end surface of the foundation 30 at a height that is the same as or slightly lower than the height of the base 31. Thereby, when the bolt part 32 a is inserted into the through hole 31 a and the base 31 is installed on the upper end surface of the foundation 30, the tip of the bolt part 32 a does not protrude upward from the upper surface of the base 31. .

基礎３０の上端面に固定される土台３１は、好ましくは正方形の断面形状を備える木製の角材である。土台３１には、アンカーボルト３２の取り付け位置と対応する箇所として、これの長手方向にアンカーボルト３２のボルト部３２ａのピッチと同様の中心間ピッチで配置されて、複数の貫通穴３１ａが貫通形成されている。これらの貫通穴３１ａは、座金付きナット２０の筒状ナット部２２の外径よりも一回り大きな内径を備えるように形成されている。これによって、座金付きナット２０の筒状ナット部２２を、貫通穴３１ａの中空内部において、アンカーボルト３２のボルト部３２ａにスムーズに螺着することができるようになっている。 The base 31 fixed to the upper end surface of the foundation 30 is preferably a wooden square member having a square cross-sectional shape. A plurality of through holes 31a are formed in the base 31 as locations corresponding to the mounting positions of the anchor bolts 32 in the longitudinal direction at the center pitch similar to the pitch of the bolt portions 32a of the anchor bolts 32. Has been. These through holes 31a are formed so as to have an inner diameter that is slightly larger than the outer diameter of the cylindrical nut portion 22 of the nut 20 with a washer. Accordingly, the cylindrical nut portion 22 of the nut 20 with a washer can be smoothly screwed to the bolt portion 32a of the anchor bolt 32 in the hollow inside of the through hole 31a.

アンカーボルト３２のボルト部３２ａに螺着される座金付きナット２０は、上述のように、筒状ナット部２２と座金部２１とからなる。筒状ナット部２２は、図１（ａ）、（ｂ）及び図３（ａ）、（ｂ）に示すように、土台３１に形成された貫通穴３１ａの内径よりも一回り小さな外径を備える中空円筒形状の部分であって、これの内側には、アンカーボルト３２のボルト部３２に設けられた雄ネジ部と同様のネジ径を有する、雌ネジ部が形成されている。筒状ナット部２２の上端部から外側に張り出すようにして、座金部２１が、一体として接合されて設けられている。 The nut 20 with a washer screwed to the bolt part 32a of the anchor bolt 32 includes the cylindrical nut part 22 and the washer part 21 as described above. As shown in FIGS. 1A, 1B and 3A, 3B, the cylindrical nut portion 22 has an outer diameter that is slightly smaller than the inner diameter of the through hole 31a formed in the base 31. A hollow cylindrical portion is provided, and a female screw portion having a screw diameter similar to that of the male screw portion provided on the bolt portion 32 of the anchor bolt 32 is formed inside thereof. A washer portion 21 is integrally joined so as to project outward from the upper end portion of the cylindrical nut portion 22.

座金部２１は、本実施形態では、筒状ナット部２２と同心円状に配置されて設けられた、円盤形状を備える部分であって、これの中央部分に、筒状ナット部２２の中空内部と連通する連通口２１ａが開口していると共に、連通口２１ａよりも径方向外側部分に、ナット締着具１０の切削係合突起１２，１３を挿通させて係合させる複数の貫通係合部２３，２４が、各々複数箇所（本第１実施形態では、第１貫通係合部２３及び第２貫通係合部２４が、２箇所ずつ合計４箇所）に形成されている。座金部２１の下面は、切削刃の無い平滑な面となっている。 In this embodiment, the washer portion 21 is a portion having a disk shape that is provided concentrically with the cylindrical nut portion 22, and has a hollow interior of the cylindrical nut portion 22 at a central portion thereof. A plurality of through-engaging portions 23 are formed in which the communicating ports 21a are open, and the cutting engagement protrusions 12 and 13 of the nut fastener 10 are inserted into and engaged with radially outer portions of the communicating ports 21a. , 24 are formed at a plurality of locations (in the first embodiment, the first through-engagement portion 23 and the second through-engagement portion 24 are provided in total at two locations in two locations). The lower surface of the washer portion 21 is a smooth surface without a cutting blade.

本実施形態では、座金部２１の径方向内側に配置される一対の第１貫通係合部２３は、略矩形の断面形状を備える貫通穴となっており、長手方向を径方向に沿わせて配置して、連通口２１ａを挟んだ両側に各々設けられている。径方向外側に配置される一対の第２貫通係合部２４は、座金部２１の周縁部から径方向内側に向けて切り欠かれた、略コの字の断面形状を備える切欠き貫通穴となっており、切欠き方向を、一対の第１貫通係合部２３が配置された径方向とは垂直な径方向に沿わせて配置して、連通口２１ａを挟んだ両側に各々設けられている。 In this embodiment, a pair of 1st penetration engaging part 23 arrange | positioned at the radial inside of the washer part 21 is a through-hole provided with a substantially rectangular cross-sectional shape, and makes a longitudinal direction follow a radial direction. It arrange | positions and is each provided in the both sides on both sides of the communication port 21a. The pair of second through-engaging portions 24 arranged on the radially outer side are notched through-holes having a substantially U-shaped cross-sectional shape cut out from the peripheral edge of the washer 21 toward the radially inner side. The notch directions are arranged along the radial direction perpendicular to the radial direction in which the pair of first through engagement portions 23 are arranged, and are provided on both sides of the communication port 21a. Yes.

また、これらの第１貫通係合部２３と第２貫通係合部２４とは、筒状ナット部２２の回転に伴って第１貫通係合部２３が回転する際の径方向外側の縁部の回転軌跡２３ａと、第２貫通係合部２４が回転する際の径方向内側の縁部の回転軌跡２４ａとが、重なるように形成されている。これによって、これらの第１貫通係合部２３や第２貫通係合部２４に、ナット締着具１０の切削係合突起１２，１３を挿通させて、先端の切削刃１２ａ，１３ａによって土台３１の上面を切削する際に、筒状ナット部２２の外側領域における座金部２１の下面と対向する部分の全体を、むらなく略均等に切削させて、座金部２１を形成することが可能になる。 The first through-engagement portion 23 and the second through-engagement portion 24 are radially outer edges when the first through-engagement portion 23 rotates as the cylindrical nut portion 22 rotates. The rotation locus 23a and the rotation locus 24a of the inner edge in the radial direction when the second through engagement portion 24 rotates are formed to overlap each other. As a result, the cutting engagement protrusions 12 and 13 of the nut fastener 10 are inserted into the first through engagement portion 23 and the second through engagement portion 24, and the base 31 is formed by the cutting blades 12 a and 13 a at the tip. When the upper surface of the cylindrical nut portion 22 is cut, the entire portion of the outer region of the cylindrical nut portion 22 that faces the lower surface of the washer portion 21 can be cut evenly and uniformly to form the washer portion 21. .

座金付きナット２０を土台３１の上面に締着させるナット締着具１０は、上述のように、回転基盤部１１と、切削係合突起１２，１３と、連結係合部１４と、当接凸部１５とを含んで形成されている。回転基盤部１１は、座金付きナット２０の座金部２１よりも一回り大きな直径の、円盤形状を備える部分であって、これの平坦な下面から垂直下方に突出して、複数の切削係合突起１２，１３が設けられている。また、回転基盤部１１における、座金付きナット２０の座金部２１よりも一回り大きくなった領域である外周縁部分から下方に突出して、当該外周縁部分に沿って円弧形状に延設する、一対の壁板状の当接凸部１５が、対向配置されて設けられている。一対の壁板状の当接凸部１５によって囲まれる、これらの内側部分が、座金付きナット２０の座金部２１を装着させる装着領域となっている。 As described above, the nut fastener 10 that fastens the nut 20 with the washer to the upper surface of the base 31 includes the rotary base portion 11, the cutting engagement protrusions 12 and 13, the connection engagement portion 14, and the contact protrusion. Part 15 is formed. The rotating base portion 11 is a portion having a disk shape having a diameter that is slightly larger than the washer portion 21 of the nut 20 with the washer. The rotating base portion 11 protrudes vertically downward from a flat lower surface thereof, and has a plurality of cutting engagement protrusions 12. , 13 are provided. Further, a pair of protrusions projecting downward from the outer peripheral edge portion, which is a region that is slightly larger than the washer portion 21 of the nut 20 with the washer, in the rotating base portion 11 and extending in an arc shape along the outer peripheral edge portion. The wall-plate-like contact convex portions 15 are provided so as to face each other. These inner portions surrounded by the pair of wall-plate-shaped contact projections 15 serve as mounting regions for mounting the washer portion 21 of the nut 20 with washer.

回転基盤部１１の下面から下方に突出する切削係合突起１２，１３は、本第１実施形態では、座金付きナット２０の座金部２１に形成された第１貫通係合部２３と対応する位置として、回転基盤部１１の径方向内側に配置された一対の第１切削係合突起１２と、第２貫通係合部２４と対応する位置として、回転基盤部１１の径方向外側に配置された一対の第２切削係合突起１３とからなる。第１切削係合突起１２は、第１貫通係合部２３に挿通可能な大きさの、第１貫通係合部２３と同様の略矩形の断面形状を備える棒状突起となっており、断面の長手方向を径方向に沿わせて配置して、回転基盤部１１の中央部分を挟んだ両側に各々設けられている。第２切削係合突起１２は、第２貫通係合部２４に挿通可能な大きさの、略矩形の断面形状を備える棒状突起となっており、断面の長手方向を、一対の第１切削係合突起１２が配置された径方向とは垂直な径方向に沿わせて配置して、回転基盤部１１の中央部分を挟んだ両側に各々設けられている。 The cutting engagement protrusions 12 and 13 projecting downward from the lower surface of the rotating base portion 11 are positions corresponding to the first through engagement portions 23 formed on the washer portion 21 of the nut 20 with a washer in the first embodiment. As a position corresponding to the pair of first cutting engagement protrusions 12 and the second through engagement portions 24 disposed on the radially inner side of the rotating base portion 11, they are disposed on the radially outer side of the rotating base portion 11. It consists of a pair of second cutting engagement protrusions 13. The first cutting engagement protrusion 12 is a rod-shaped protrusion having a substantially rectangular cross-sectional shape similar to that of the first through-engagement part 23 and having a size that can be inserted into the first through-engagement part 23. The longitudinal direction is arranged along the radial direction and provided on both sides of the central portion of the rotating base portion 11. The second cutting engagement protrusion 12 is a rod-shaped protrusion having a substantially rectangular cross-sectional size that can be inserted into the second through engagement portion 24, and the longitudinal direction of the cross section is defined as a pair of first cutting engagement members. It arrange | positions along the radial direction perpendicular | vertical to the radial direction in which the joint protrusion 12 is arrange | positioned, and is provided in the both sides which pinched | interposed the center part of the rotation base part 11, respectively.

また、第１切削係合突起１２及び第２切削係合突起１３は、その先端に切削刃１２ａ，１３ａを備えると共に、座金部２１における貫通係合部２３，２４の貫通長さに相当する、座金付きナット２０の座金部２１の厚さよりも、大きな突出長さで、回転基盤部１１の下面から下方に突出して設けられている。これによって、第１切削係合突起１２及び第２切削係合突起１３を、第１貫通係合部２３や第２貫通係合部２４に各々挿通し、且つ回転基盤部１１の下面に座金部２１の上面を当接させて、当接凸部１５の内側部分の装着領域に座金付きナット２０の座金部２１を装着した際に、少なくとも切削刃１２ａ，１３ａの刃先を座金部２１の下面から下方に突出させることで、ナット締着具１０及び座金付きナット２０を回転させながら、土台３１の上面を切削できるようになっている。 Further, the first cutting engagement protrusion 12 and the second cutting engagement protrusion 13 are provided with cutting blades 12a and 13a at their tips, and correspond to the penetration lengths of the penetration engagement portions 23 and 24 in the washer portion 21. The nut 20 with a washer 20 is provided so as to protrude downward from the lower surface of the rotating base part 11 with a projecting length larger than the thickness of the washer part 21. Accordingly, the first cutting engagement protrusion 12 and the second cutting engagement protrusion 13 are inserted into the first through engagement portion 23 and the second through engagement portion 24, respectively, and the washer portion is formed on the lower surface of the rotary base portion 11. When the washer part 21 of the nut 20 with a washer is attached to the attachment region of the inner part of the abutting convex part 15 by abutting the upper surface of the abutting convex part 15, at least the cutting edges of the cutting blades 12 a and 13 a from the lower surface of the washer part 21 By projecting downward, the upper surface of the base 31 can be cut while rotating the nut fastener 10 and the nut 20 with washer.

回転基盤部１１の外周縁部分から下方に突出して設けられた当接凸部１５は、上述のように、外周縁部分に沿って円弧形状に延設する、一対の壁板状の部分となっている。一対の当接凸部１５は、これらの両側の端部の間に、切削屑を排出口となる切欠き部分１６を各々形成して、断続させた状態で、径方向に対向配置されて設けられている。一対の切欠き部分１６に臨むようにして、一対の第２切削係合突起１３が各々配置されている。当接凸部１５の円弧形状の先端面１５ａは、平滑な面となっており、これによって、当接凸部１５の先端面１５ａを土台３１の上面に当接させて、回転基盤部１１の下方への移動をストップさせた後に、回転基盤部１１をさらに回転させて座金付きナット２０を締め付ける際に、当接凸部１５を土台３１の上面に沿ってスムーズに回転させることが可能になる。 As described above, the contact protrusion 15 provided to protrude downward from the outer peripheral edge portion of the rotating base portion 11 is a pair of wall plate-like portions extending in an arc shape along the outer peripheral edge portion. ing. The pair of contact projections 15 are provided so as to be opposed to each other in the radial direction in a state where notched portions 16 serving as discharge openings for the cutting waste are formed between the end portions on both sides. It has been. A pair of second cutting engagement protrusions 13 are respectively arranged so as to face the pair of notch portions 16. The arcuate tip surface 15a of the contact convex portion 15 is a smooth surface, whereby the tip surface 15a of the contact convex portion 15 is brought into contact with the upper surface of the base 31 and After stopping the downward movement, the abutment convex portion 15 can be smoothly rotated along the upper surface of the base 31 when the rotating base portion 11 is further rotated to tighten the nut 20 with a washer. .

また、本実施形態では、当接凸部１５は、回転基盤部１１の平坦な下面から、切削係合突起１２，１３よりも短い長さで突出していることで、当接凸部１５の先端と切削係合突起１２，１３の先端との間には、座金付きナット２０の座金部２１の厚さ以上の高低差が保持されるようになっている。これによって、回転基盤部１１の下方への移動がストップするまで、座金部２１の下面に突出させた切削係合突起１２，１３の切削刃１２ａ，１３ａにより土台３１の上面を切削した際に、土台３１の上面から座金部２１が突出しなくなる深さまで座堀部３３を切削すること可能になって、土台３１の上面から突出させることなく、座金部２１を座堀部３３の底面３３ａに締着させることが可能になる。 Further, in the present embodiment, the contact protrusion 15 protrudes from the flat bottom surface of the rotary base 11 with a length shorter than the cutting engagement protrusions 12 and 13, so that the tip of the contact protrusion 15 is formed. And a height difference equal to or greater than the thickness of the washer portion 21 of the nut 20 with the washer is maintained between the cutting engagement protrusions 12 and 13. Thereby, when the upper surface of the base 31 is cut by the cutting blades 12a and 13a of the cutting engagement protrusions 12 and 13 protruded from the lower surface of the washer portion 21 until the downward movement of the rotary base portion 11 is stopped. The washer part 33 can be cut from the upper surface of the base 31 to a depth at which the washer part 21 does not protrude, and the washer part 21 is fastened to the bottom surface 33 a of the washer part 33 without protruding from the upper surface of the base 31. Is possible.

回転基盤部１１の切削係合突起１２，１３や当接凸部１５が突出する側と反対側の上面部に設けられた連結係合部１４は、インパクトレンチ等の回転工具５０にナット締着具１０を着脱可能に、且つ回転可能に連結する機能を有する公知の部分であって、例えば４角形又は６角形の断面形状を有する回転軸部や、回転工具５０への着脱機構等を備えている。 The coupling engagement portion 14 provided on the upper surface portion of the rotary base portion 11 on the side opposite to the side from which the cutting engagement protrusions 12 and 13 and the contact protrusion 15 protrude is fastened with a nut to a rotary tool 50 such as an impact wrench. It is a known part having a function of connecting the tool 10 so as to be detachable and rotatable, and includes, for example, a rotary shaft portion having a quadrangular or hexagonal cross-sectional shape, a detachable mechanism for the rotary tool 50, and the like. Yes.

上述の構成を備える本実施形態のナット締着具１０を用いて、土台３１に形成された貫通穴３１ａに配設されたアンカーボルト３２のボルト部３２ａに座金付きナット２０を螺着することで、座金付きナット２０の座金部２１を土台３１の上面に締着するには、インパクトレンチ等の回転工具５０（図示せず）に連結係合部１４を介してナット締着具１０を連結した状態で、図２（ａ）〜（ｅ）に示すように、例えば作業員の手作業によって筒状ナット部２２の下端部をボルト部３２ａの上端部に僅かに螺着させることにより、座金部２１の下面を土台３１の上面と離間させて立設させた座金付きナット２０に対して、ナット締着具１０の切削係合突起１２，１３を座金付きナット２０の貫通係合部２３，２４に挿入係合すると共に、回転基盤部１１の下面に座金部２１の上面を当接させることによって、座金部２１を回転基盤部１１の装着領域に装着する（図２（ａ）、（ｂ）参照）。 By using the nut fastener 10 of the present embodiment having the above-described configuration, the nut 20 with a washer is screwed onto the bolt portion 32a of the anchor bolt 32 disposed in the through hole 31a formed in the base 31. In order to fasten the washer portion 21 of the nut 20 with the washer to the upper surface of the base 31, the nut fastener 10 is connected to the rotary tool 50 (not shown) such as an impact wrench via the connection engaging portion 14. In the state, as shown in FIGS. 2A to 2E, the washer portion is formed by slightly screwing the lower end portion of the cylindrical nut portion 22 to the upper end portion of the bolt portion 32a, for example, by an operator's manual operation. With respect to the nut 20 with a washer standing upright with the lower surface of the base 21 spaced apart from the upper surface of the base 31, the cutting engagement protrusions 12 and 13 of the nut fastener 10 are connected to the through-engaging portions 23 and 24 of the nut 20 with a washer. And engaged with the rotation base By abutting the upper surface of the washer portion 21 on the lower surface of the section 11, mounting the washer 21 on the attachment area of the turntable unit 11 (FIG. 2 (a), the reference (b)).

なお、座金付きナット２０は、筒状ナット部２２をボルト部３２ａに螺着させてから、座金部２１をナット締着具１０の回転基盤部１１に装着させる必要は必ずしも無く、例えば、ナット締着具１０の回転基盤部１１に取り付けられた磁石を介して、回転基盤部１１の下面に座金部２１の上面を当接させると共に、切削係合突起１２，１３を貫通係合部２３，２４に挿入係合させて、座金部２１をナット締着具１０に予め装着してから、座金付きナット２０をナット締着具１０と共に回転させつつ土台３１の貫通穴３１ａに向けて押し込むことで、筒状ナット部２２をアンカーボルト３２のボルト部３２ａに螺着させることもできる。 The nut 20 with a washer is not necessarily required to be attached to the rotary base 11 of the nut fastener 10 after the cylindrical nut portion 22 is screwed to the bolt portion 32a. The upper surface of the washer part 21 is brought into contact with the lower surface of the rotary base part 11 via a magnet attached to the rotary base part 11 of the dressing 10, and the cutting engagement protrusions 12 and 13 are inserted into the through-engaging parts 23 and 24. The washer portion 21 is pre-mounted on the nut fastener 10 by being inserted into and engaged with the nut fastener 10 and then pushed toward the through hole 31a of the base 31 while rotating the nut 20 with the washer together with the nut fastener 10; The cylindrical nut portion 22 can also be screwed onto the bolt portion 32a of the anchor bolt 32.

貫通係合部２３，２４に挿入係合された切削係合突起１２，１３は、回転基盤部１１の下面に座金部２１の上面が当接するまで挿入された際に、先端の切削刃１２ａ，１３ａを、座金部２１の下面から下方に突出させることになる。これによって、座金付きナット２０をナット締着具１０と共に回転させつつ土台３１の貫通穴３１ａに向けてさらに押し込むことで、切削刃１２ａ，１３ａによって土台３１の上面を切削しながら、筒状ナット部２２をアンカーボルト３２のボルト部３２ａにさらに螺着させてゆくことが可能になる（図２（ｂ）参照）。 When the cutting engagement protrusions 12 and 13 inserted and engaged with the through engagement portions 23 and 24 are inserted until the upper surface of the washer portion 21 comes into contact with the lower surface of the rotating base portion 11, the cutting blades 12a and 12b at the tip end are inserted. 13a is protruded downward from the lower surface of the washer portion 21. Thus, the nut 20 with a washer is rotated together with the nut fastener 10 and further pushed into the through hole 31a of the base 31, thereby cutting the upper surface of the base 31 with the cutting blades 12a and 13a, and the cylindrical nut portion. 22 can be further screwed onto the bolt portion 32a of the anchor bolt 32 (see FIG. 2B).

座金付きナット２０をナット締着具１０と共に回転させつつ、筒状ナット部２２をボルト部３２ａにさらに螺着させてゆくことで、座金付きナット２０とナット締着具１０とは、切削刃１２ａ，１３ａによって土台３１の上面を切削しながら、下方に移動して行くことになる。ナット締着具１０の下方への移動によって、ナット締着具１０の当接凸部１５が土台３１の上面に当接すると、ナット締着具１０の下方への移動がストップすると共に、切削係合突起１２，１３の切削刃１２ａ，１３ａによる切削によって、土台３１の上面には、当該上面から突出させない状態で座金部２１を収容するのに十分な深さの座堀部３３が形成される（図２（ｃ）参照）。 By rotating the nut 20 with a washer together with the nut fastener 10 and further screwing the cylindrical nut portion 22 to the bolt portion 32a, the nut 20 with washer and the nut fastener 10 are provided with a cutting blade 12a. , 13a, the upper surface of the base 31 is cut while moving downward. When the contact projection 15 of the nut fastener 10 contacts the upper surface of the base 31 due to the downward movement of the nut fastener 10, the downward movement of the nut fastener 10 stops and the cutting member By cutting the mating protrusions 12 and 13 with the cutting blades 12a and 13a, a washer portion 33 having a depth sufficient to accommodate the washer portion 21 without being projected from the upper surface is formed on the upper surface of the base 31 (see FIG. (Refer FIG.2 (c)).

ナット締着具１０の当接凸部１５が土台３１の上面に当接すると共に、切削係合突起１２，１３の切削刃１２ａ，１３ａによって十分な深さの座堀部３３が形成された状態から、座金付きナット２０とナット締着具１０とを引き続き回転させて、ボルト部３２ａに筒状ナット部２２をさらに螺着させてゆくと、ナット締着具１０は、当接凸部１５を土台３１の上面に当接させつつ、回転基盤部１１の下方への移動をストップさせた状態で回転し続ける。また、座金付きナット２０は、筒状ナット部２２をボルト部３２ａにさらに螺着させながら、座金部２１の下面が座堀部３３の底面３３ａに密着するまで、下方に移動してゆく（図２（ｄ）参照）。これによって、座金付きナット２０は、座金部２１の下面の全体を座堀部３３の底面３３ａに安定した状態で隙間なく密着させて、土台３１の上面に形成された座金部２１に、強固に締着されることになる。またこれによって、座金付きナット２０を介してボルト部３２ａの先端が座堀部３３に締着されたアンカーボルト３２に、十分な引張り力を付与することが可能になる。 From the state in which the contact protrusion 15 of the nut fastener 10 is in contact with the upper surface of the base 31 and the cutting hole 12a, 13a of the cutting engagement protrusions 12, 13 is formed with a sufficient depth of the recessed portion 33. When the nut 20 with washer and the nut fastener 10 are continuously rotated and the cylindrical nut portion 22 is further screwed onto the bolt portion 32a, the nut fastener 10 causes the abutment convex portion 15 to form the base 31. The rotating base part 11 continues to rotate in a state where the downward movement of the rotating base part 11 is stopped. Further, the nut 20 with the washer moves downward while the cylindrical nut portion 22 is further screwed onto the bolt portion 32a until the lower surface of the washer portion 21 comes into close contact with the bottom surface 33a of the washer portion 33 (FIG. 2). (See (d)). As a result, the nut 20 with the washer is firmly tightened to the washer portion 21 formed on the upper surface of the base 31 by bringing the entire lower surface of the washer portion 21 into close contact with the bottom surface 33a of the washer portion 33 in a stable state without gaps. Will be worn. In addition, this makes it possible to apply a sufficient tensile force to the anchor bolt 32 in which the tip of the bolt portion 32 a is fastened to the washer portion 33 via the nut 20 with a washer.

座金付きナット２０の座金部２１を、土台３１の上面の座堀部３３に締着させたら、座金部２１の貫通係合部２３，２４から切削係合突起１２，１３を引き抜いて、ナット締着具１０を座金付きナット２０から取り外す。切削係合突起１２，１３を引き抜く際に、ナット締着具１０に引き続き回転力を加えることで、座金付きナット２０をアンカーボルト３２のボルト部３２ａに増し締めして、座金付きナット２０を座金部２１にさらに強固に締着させることが可能になる。 After the washer portion 21 of the nut 20 with the washer is fastened to the wasting portion 33 on the upper surface of the base 31, the cutting engagement protrusions 12 and 13 are pulled out from the through engagement portions 23 and 24 of the washer portion 21, and the nut is fastened. Remove tool 10 from nut 20 with washer. When the cutting engagement protrusions 12 and 13 are pulled out, a rotational force is continuously applied to the nut fastener 10 to further tighten the nut 20 with a washer to the bolt portion 32a of the anchor bolt 32, and the nut 20 with a washer is washer. It is possible to tighten the portion 21 more firmly.

これらによって、本実施形態のナット締着具１０や座金付きナットの締着方法によれば、土台３１上面に形成された座堀部３３に座金付きナット２０を締着させた際に、座堀部３３の底面３３ａと座金部２１の下面とを隙間なく密着させることを可能にして、アンカーボルト３２に十分な引張り力を付与することが可能になる。 Thus, according to the nut fastener 10 and the method of fastening a nut with a washer according to the present embodiment, when the nut 20 with a washer is fastened to the washer 33 formed on the upper surface of the base 31, the washer 33 This makes it possible to closely contact the bottom surface 33a and the lower surface of the washer portion 21 with no gap, and to apply a sufficient tensile force to the anchor bolt 32.

図４は、ナット締着具１７の他の好ましい形態を例示するものである。図４に示すナット締着具１７では、回転基盤部１８は、座金付きナット２５の座金部２６よりも一回り小さな平面形状を備えるように形成されており、当接凸部１９は、回転基盤部１８よりも外側に張り出した状態で設けられている。また図４に示す形態では、座金付きナット２５の座金部２６の下面は、下方に向けて扁平な円錐形状となるように突出する、テーパー形状の下面となっている。座堀部３４に、座金部２６のテーパー形状の下面に対応させたテーパー形状の底面３４ａを、効率良く形成できるように、切削係合突起１８ａ，１８ｂが設けられた回転基盤部１８の下面もまた、テーパー形状の下面となっている。 FIG. 4 illustrates another preferred form of the nut fastener 17. In the nut fastener 17 shown in FIG. 4, the rotary base portion 18 is formed to have a planar shape that is slightly smaller than the washer portion 26 of the nut 25 with the washer. It is provided in a state of protruding outward from the portion 18. Moreover, in the form shown in FIG. 4, the lower surface of the washer portion 26 of the nut 25 with the washer is a tapered lower surface that protrudes downward so as to have a flat conical shape. The bottom surface of the rotary base portion 18 provided with the cutting engagement protrusions 18a and 18b is also formed so that the tapered bottom surface 34a corresponding to the tapered bottom surface of the washer portion 26 can be efficiently formed on the pocket portion 34. It has a tapered lower surface.

図４に示すナット締着具１７によれば、上記実施形態のナット締着具１７と同様の作用効果を奏する他、回転基盤部１８が、座金付きナット２５の座金部２６よりも一回り小さな平面形状を備えていることで、切削係合突起１８ａ，１８ｂによる切削で生じた座堀屑を排出し易くなる。 According to the nut fastener 17 shown in FIG. 4, the rotating base portion 18 is slightly smaller than the washer portion 26 of the washer-provided nut 25 in addition to the same effects as the nut fastener 17 of the above embodiment. By providing the planar shape, it becomes easy to discharge the scraping scraps generated by the cutting by the cutting engagement protrusions 18a and 18b.

図５は、本発明の他の好ましい座金付きナットの締着方法を例示するものである。図５に示す締着方法では、ナット締着具５１が連結される、ナット締着具５１を回転駆動させる回転工具５０に、これの外周面から延設して、回転基盤部５２の下方への移動をストップさせるストッパー部５３が設けられている。そして、座金付きナット５４の座金部５５が土台５６の表面から突出しなくなる深さまで、切削係合突起５７の切削刃５７ａによって土台５６の表面を切削して座堀部５８を形成した後に、回転工具５０の外周面から延設して取り付けられたストッパー部５３を、土台５６の表面に当接させることで、回転基盤部５２の下方への移動をストップさせるようになっている。 FIG. 5 illustrates another preferred method of fastening a nut with a washer according to the present invention. In the fastening method shown in FIG. 5, a rotary tool 50, which is connected to the nut fastener 51 and rotates the nut fastener 51, extends from the outer peripheral surface of the rotary tool 50, and is below the rotary base portion 52. The stopper part 53 which stops the movement of is provided. Then, after the surface of the base 56 is cut by the cutting blade 57a of the cutting engagement protrusion 57 to the depth at which the washer portion 55 of the nut 54 with the washer does not protrude from the surface of the base 56, the rotary tool 50 is formed. The stopper part 53 that is extended and attached from the outer peripheral surface is brought into contact with the surface of the base 56 to stop the downward movement of the rotary base part 52.

図５に示す座金付きナットの締着方法によれば、上記実施形態の締着方法と同様の作用効果を奏する他、ストッパー部５３を、回転させることなく土台５６の表面に当接させて、回転基盤部５２の下方への移動をストップすることができるので、さらに安定した状態で、座金付きナット５４の座金部５５を座堀部５８に締着させることが可能になる。 According to the fastening method of the nut with a washer shown in FIG. 5, the stopper 53 is brought into contact with the surface of the base 56 without rotating, in addition to the same effects as the fastening method of the above embodiment. Since the downward movement of the rotary base portion 52 can be stopped, the washer portion 55 of the nut with washer 54 can be fastened to the washer portion 58 in a more stable state.

なお、本発明は上記実施形態に限定されることなく種々の変更が可能である。例えば、座金付きナットの座金部が締着される木製構造材は、土台である必要は必ずしも無く、梁や柱等の、その他の種々の骨組み構造を形成する構造材であっても良い。また、筒状ナット部が螺着される緊結ボルトは、アンカーボルトの他、羽子板ボルト等の、その他の種々の緊結ボルトであっても良い。さらに、回転基盤部の下面部における、座金部の装着領域の外周部分から下方に突出して設けられた当接凸部は、壁板状の部分である必要は必ずしもなく、突起状等の部分であっても良い。 The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the wooden structural material to which the washer portion of the nut with the washer is fastened does not necessarily have to be a base, and may be a structural material that forms other various frame structures such as beams and columns. Further, the tightening bolt to which the cylindrical nut portion is screwed may be other various tightening bolts such as a battledore bolt in addition to the anchor bolt. Furthermore, the contact protrusion provided on the lower surface portion of the rotating base portion so as to protrude downward from the outer peripheral portion of the mounting region of the washer portion does not necessarily have to be a wall plate-like portion, but a protrusion-like portion or the like. There may be.

また、本発明の座金付きナットの締着方法は、例えば図６（ａ）〜（ｃ）に示すように、ナット締着具６０の回転基盤部６１には、当接凸部を設けることなく、切削係合突起６２のみを、座金付きナット６３の座金部６４の厚さよりも僅かに大きな長さで、回転基盤部６１の下面から下方に突出させておき、座金付きナット６３の座金部６４が土台６５の表面から突出しなくなる深さまで、切削係合突起６２の切削刃６２ａによって土台６５の表面を切削して座堀部６６を形成した後に、回転基盤部６１の下面を土台６５の表面に当接させることにより、ストッパー部として機能させて、回転基盤部６１の下方への移動をストップさせるようにすることもできる。 Further, according to the fastening method of the nut with a washer of the present invention, for example, as shown in FIGS. 6A to 6C, the rotating base portion 61 of the nut fastener 60 is not provided with a contact convex portion. Only the cutting engagement protrusion 62 is protruded downward from the lower surface of the rotary base 61 with a length slightly larger than the thickness of the washer 64 of the nut 63 with washer, and the washer 64 of the nut 63 with washer. After the surface of the base 65 is cut by the cutting blade 62 a of the cutting engagement protrusion 62 to a depth at which the surface of the base 65 does not protrude from the surface of the base 65, the lower surface of the rotary base 61 is brought into contact with the surface of the base 65. By making it contact, it can be made to function as a stopper part, and the downward movement of the rotation base part 61 can also be stopped.

１０，１７，５１ナット締着具
１１，１８，５２回転基盤部
１２第１切削係合突起
１２ａ切削刃
１３第２切削係合突起
１３ａ切削刃
１４連結係合部
１５，１９当接凸部
１６切欠き部分
２０，２５，５４座金付きナット
２１，２６，５５座金部
２２筒状ナット部
２３第１貫通係合部
２４第２貫通係合部
３０基礎
３１，５６土台（木製構造材）
３１ａ貫通穴
３２アンカーボルト（緊結ボルト）
３２ａボルト部
３３，３４，５８座堀部
３３ａ，３４ａ底面
５０回転工具
５３ストッパー部
５７切削係合突起
５７ａ切削刃 10, 17, 51 Nut fasteners 11, 18, 52 Rotating base portion 12 First cutting engagement protrusion 12a Cutting blade 13 Second cutting engagement protrusion 13a Cutting blade 14 Connection engagement portions 15, 19 Contact convex portion 16 Notched portions 20, 25, 54 Nuts with washers 21, 26, 55 Washers 22 Tubular nut 23 First penetration engagement 24 Second penetration engagement 30 Foundation 31, 56 Foundation (wooden structural material)
31a Through hole 32 Anchor bolt (tightening bolt)
32a Bolt portions 33, 34, 58 Counterboring portions 33a, 34a Bottom surface 50 Rotating tool 53 Stopper portion 57 Cutting engagement protrusion 57a Cutting blade

Claims

木製構造材に貫通形成された貫通穴に配設された緊結ボルトに螺着される、筒状ナット部と座金部とからなる座金付きナットの座金部を、木製構造材の表面に突出させることなく締着させるための、回転基盤部を備えるナット締着具であって、
前記座金付きナットには、前記座金部に、前記回転基盤部を係合させる貫通係合部が複数箇所に形成されており、
前記回転基盤部には、前記座金部が装着される側の下面部から下方に突出して、前記貫通係合部に各々係合される複数の切削係合突起が、前記貫通係合部と対応する位置に設けられていると共に、前記座金部が装着される側と反対側の上面部に、インパクトレンチ等の回転工具に連結される連結係合部が設けられており、
且つ前記回転基盤部には、前記下面部における前記座金部の装着領域の外周部分から下方に突出して、前記木製構造材の表面に当接させる当接凸部が、周方向に連続して、又は断続して設けられており、
前記切削係合突起は、前記座金部の前記貫通係合部の貫通長さよりも長い長さで突出していることで、前記貫通係合部に挿入係合された際に、先端の切削刃が、前記座金部の下面よりも下方に突出可能となっており、
前記当接凸部は、前記切削係合突起よりも短い長さで突出していることで、前記当接凸部の先端と前記切削係合突起の先端との間に、前記座金部の厚さ以上の高低差が保持されているナット締着具。 A washer part of a nut with a washer that is screwed into a tightening bolt disposed in a through hole formed in a wooden structure material and projecting from a nut with a washer that protrudes from the surface of the wooden structure material. A nut fastening tool having a rotating base part for tightening without tightening,
In the nut with washer, the washer part is formed with a plurality of penetrating engagement parts for engaging the rotating base part,
A plurality of cutting engagement protrusions that protrude downward from the lower surface portion on the side on which the washer portion is attached to the rotary base portion and that are respectively engaged with the penetration engagement portion correspond to the penetration engagement portion. A connecting engagement portion connected to a rotary tool such as an impact wrench is provided on the upper surface portion opposite to the side on which the washer portion is mounted,
And in the rotation base part, a contact convex part that protrudes downward from the outer peripheral part of the mounting region of the washer part on the lower surface part and makes contact with the surface of the wooden structure material continues in the circumferential direction, Or provided intermittently,
The cutting engagement protrusion protrudes with a length longer than the penetration length of the penetration engagement portion of the washer portion, so that the cutting blade at the tip is inserted and engaged with the penetration engagement portion. , And can protrude downward from the lower surface of the washer.
The contact protrusion protrudes with a length shorter than that of the cutting engagement protrusion, so that the thickness of the washer portion is between the front end of the contact protrusion and the front end of the cutting engagement protrusion. Nut fastener that maintains the above height difference.

前記回転基盤部は、前記座金付きナットの座金部よりも一回り小さな平面形状を備えるように形成されており、前記当接凸部は、前記回転基盤部よりも外側に張り出した状態で設けられている請求項１記載のナット締着具。 The rotating base part is formed to have a planar shape that is slightly smaller than the washer part of the nut with the washer, and the abutting convex part is provided in a state of protruding outward from the rotating base part. The nut fastener according to claim 1.

木製構造材に貫通形成された貫通穴に配設された緊結ボルトに螺着される、筒状ナット部と座金部とからなる座金付きナットの座金部を、ナット締着具を用いて、木製構造材の表面に突出させることなく締着させるための座金付きナットの締着方法であって、
前記座金付きナットには、前記座金部に、前記ナット締着具の回転基盤部を係合させる貫通係合部が複数箇所に形成されており、
前記ナット締着具は、インパクトレンチ等の回転工具に連結される連結係合部と、前記回転工具による駆動力によって回転する前記回転基盤部とを備えており、該回転基盤部には、前記座金部が装着される側の下面部から下方に突出して、前記貫通係合部に各々係合される複数の切削係合突起が、前記貫通係合部と対応する位置に設けられており、
前記切削係合突起を前記貫通係合部に挿入係合して、前記座金部を前記回転基盤部に装着した状態で、前記座金部の下面から下方に突出させた、前記回転基盤部の前記切削係合突起の先端の切削刃によって、前記木製構造材の表面を切削しながら、前記座金付きナットを回転させつつ前記筒状ナット部を前記緊結ボルトに螺着させる工程と、
前記座金部が前記木製構造材の表面から突出しなくなる深さまで前記切削刃によって前記木製構造材の表面を切削した後に、前記回転基盤部の前記座金部が装着される側の下面部における、前記座金部の装着領域の外周部分から下方に突出して、周方向に連続して、又は断続して設けられた当接凸部を、前記木製構造材の表面に当接させることで、或いは前記ナット締着具が連結される前記回転工具の外周面から延設して取り付けられたストッパー部を、前記木製構造材の表面に当接させることで、又は前記回転基盤部の下面を前記木製構造材の表面に当接さてストッパー部として機能させることで、前記回転基盤部の下方への移動をストップさせて、前記座金付きナットのみを下方に移動させながら、前記座金付きナットを回転させつつ前記筒状ナット部を前記緊結ボルトに螺着させることで、前記座金部を、前記木製構造材の表面から突出させることなく、前記切削刃によって切削された座堀部の底面に締着させる工程とを含む座金付きナットの締着方法。 Using a nut fastener, a washer part of a nut with a washer that is screwed into a tightening bolt disposed in a through hole formed in a wooden structure material, using a nut fastener A method for fastening a nut with a washer for fastening without protruding onto the surface of a structural material,
In the nut with washer, the washer portion is formed with a plurality of through-engaging portions that engage the rotating base portion of the nut fastener,
The nut fastener includes a coupling engagement portion connected to a rotary tool such as an impact wrench, and the rotary base portion that rotates by a driving force of the rotary tool. A plurality of cutting engagement protrusions that protrude downward from the lower surface portion on the side where the washer portion is mounted and are respectively engaged with the penetration engagement portion are provided at positions corresponding to the penetration engagement portion,
The cutting base protrusion is protruded downward from the lower surface of the washer part in a state where the cutting engagement protrusion is inserted and engaged with the penetration engaging part and the washer part is mounted on the rotating base part. Cutting the surface of the wooden structure material with a cutting blade at the tip of the cutting engagement protrusion, and rotating the nut with washer while screwing the cylindrical nut portion to the tightening bolt;
The washer at the lower surface portion of the rotating base portion on the side where the washer portion is mounted after the cutting blade cuts the surface of the wooden structure material to a depth at which the washer portion does not protrude from the surface of the wooden structure material. By projecting downward from the outer peripheral portion of the mounting area of the part and contacting the surface of the wooden structure material with a contact convex part provided continuously or intermittently in the circumferential direction, or by tightening the nut A stopper portion extended and attached from the outer peripheral surface of the rotary tool to which the attachment is connected is brought into contact with the surface of the wooden structure material, or a lower surface of the rotary base portion is made of the wooden structure material. be to function as a contact Well stopper portion on a surface, said to stop the downward movement of the turntable unit, while moving only the downward the washer nut, before while rotating the washer nut Tightening the washer part to the bottom surface of the pocket part cut by the cutting blade without causing the washer part to protrude from the surface of the wooden structure material by screwing a cylindrical nut part to the binding bolt; How to tighten nuts with washers.