JP6374235B2 - Anchor bolt - Google Patents
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- JP6374235B2 JP6374235B2 JP2014132658A JP2014132658A JP6374235B2 JP 6374235 B2 JP6374235 B2 JP 6374235B2 JP 2014132658 A JP2014132658 A JP 2014132658A JP 2014132658 A JP2014132658 A JP 2014132658A JP 6374235 B2 JP6374235 B2 JP 6374235B2
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Description
本発明は、岩壁の表面やコンクリート製の天井などの壁面に設けた孔に固定するアンカーボルトに関するものである。 The present invention relates to an anchor bolt that is fixed to a hole provided in a wall surface such as a rock wall surface or a concrete ceiling.
例えば、特許文献１で示すように、岩壁の表面などにドリルなどを用いて孔を空け、その孔にアンカーボルトを差し込んで固定するものが知られている。 For example, as shown in Patent Document 1, there is known a technique in which a hole is drilled on the surface of a rock wall using a drill or the like, and an anchor bolt is inserted and fixed in the hole.
詳しくは、特許文献１のアンカーボルトでは、先端面（特許文献１の第２図では右側）に近づくに従って径が大きくなる円錐部材の周面に、内面を円錐面形状に勾配させたＣ型形状のシェルを係合させている。また、前記円錐部材の中心軸に沿って貫通状に設けた雌ねじにロッドの外周面に形成している雄ねじを螺合させている。 Specifically, in the anchor bolt of Patent Document 1, a C-shaped shape in which the inner surface is inclined to a conical surface shape on the peripheral surface of a conical member whose diameter increases as it approaches the tip surface (right side in FIG. 2 of Patent Document 1). The shell is engaged. Further, a male screw formed on the outer peripheral surface of the rod is screwed into a female screw provided in a penetrating manner along the central axis of the conical member.
そして、岩壁などに空けた孔へ前記アンカーボルトを差し込んだのち、前記ロッドを回転させて、前記円錐部材に対して前記孔から引き抜く方向の引っ張り力を加える。すると、円錐部材が孔の開口側（特許文献１の第２図では左側）へ動いて、その円錐部材の周面がシェルを前記孔の内周面側に押し、それによってシェルの外周面が前記孔の内周面に押し付けられて、前記アンカーボルトが岩壁などに固定される。 Then, after inserting the anchor bolt into a hole formed in a rock wall or the like, the rod is rotated to apply a pulling force in a direction of pulling out from the hole to the conical member. Then, the conical member moves to the opening side of the hole (left side in FIG. 2 of Patent Document 1), and the peripheral surface of the conical member pushes the shell toward the inner peripheral surface side of the hole. The anchor bolt is fixed to a rock wall or the like by being pressed against the inner peripheral surface of the hole.
特許文献１のアンカーボルトでは、ロッドの先端のみに前記円錐部材および前記シェルを配置しているために、ロッドなどに加わる振動によって前記シェルを支点に当該ロッドが揺動する虞がある。特に、使用目的などによっては前記孔を深く形成し、それに合わせてロッドを長く形成することがあるが（特許文献１の第１図参照）、その場合にはロッドがより振動し易くなる。 In the anchor bolt of Patent Document 1, since the conical member and the shell are disposed only at the tip of the rod, there is a risk that the rod may swing around the shell as a fulcrum due to vibration applied to the rod or the like. In particular, depending on the purpose of use, etc., the hole may be formed deeply, and the rod may be formed to be longer (see FIG. 1 of Patent Document 1). In this case, the rod is more likely to vibrate.
その対策としては、ロッドの長さ方向の中間位置にも前記円錐部材および前記シェルを配置することが考えられるが、そのアンカーボルトの組み立ての際には、円錐部材をロッドの先端に螺合し、その状態で円錐部材またはロッドを回転させて円錐部材をロッドの中間位置まで移動させる作業が必要である。その円錐部材またはロッドを回転さなければならない分だけアンカーボルトの組み立てに手間と時間とがかかることになる。 As a countermeasure, the conical member and the shell may be arranged at an intermediate position in the length direction of the rod, but when assembling the anchor bolt, the conical member is screwed onto the tip of the rod. In this state, it is necessary to rotate the conical member or the rod to move the conical member to the intermediate position of the rod. As much as the conical member or rod has to be rotated, it takes time and effort to assemble the anchor bolt.
本発明は、かかる不都合を解決することを目的として提供されたものであり、ロッドが長くても組み立ての手間などを軽減できるアンカーボルトを提供することにある。 The present invention has been provided for the purpose of solving such inconveniences, and it is an object of the present invention to provide an anchor bolt that can reduce the assembly effort even if the rod is long.
本発明は、かかる不都合を解決するために、壁面１に設けた取付孔２に固定するアンカーボルトであって、円柱面状の外周面に雄ねじ３を形成しているロッド４と、ロッド４の雄ねじ３に螺合する雌ねじ６を中心軸に沿って形成しているテーパー部材７と、テーパー部材７に外嵌する拡開部材８とを有していて、テーパー部材７および拡開部材８は、ロッド４の長さ方向の中間に配置可能になっており、拡開部材８は、テーパー部材７の外周面に当接する内面１１を設けている当接部１２を有していて、ロッド４の回転に伴ってテーパー部材７がねじ作用でロッド４に沿って移動することで、テーパー部材７の外周面が当接部１２の内面１１を押し、それによって当接部１２の外周面１５が取付孔２の内周面２ａに押し付けられて、アンカーボルトが取付孔２の内周面２ａに固定されるようになっており、テーパー部材７は、分割面１８・１９によって複数個のテーパー片７ａ・７ｂに分割しており、その分割面１８・１９は、テーパー部材７の雌ねじ６を通るように形成していて、それによって各テーパー片７ａ・７ｂには、雌ねじ部分６ａ・６ｂをそれぞれ有しており、向かい合うテーパー片７ａ・７ｂの分割面１８・１９どうしには、互いに係合する少なくとも一対の凸部２０および凹部２１を配置しており、凸部２０は、円柱形状または四角柱形状であり、それに合わせて凹部２１の形状が設定されており、テーパー片７ａ・７ｂの雌ねじ部分６ａ・６ｂによってロッド４の雄ねじ３を挟むようにして、対になる凸部２０と凹部２１とを互いに係合することで、ロッド４の雄ねじ３にテーパー部材７の雌ねじ６が螺合するようになっていることを特徴とする。 In order to solve such inconveniences, the present invention is an anchor bolt that is fixed to a mounting hole 2 provided in a wall surface 1 and has a rod 4 having a male thread 3 formed on a cylindrical outer peripheral surface, The taper member 7 has a taper member 7 that is formed along the central axis with a female screw 6 that is screwed into the male screw 3, and an expansion member 8 that fits outside the taper member 7. The taper member 7 and the expansion member 8 are The expanding member 8 has an abutting portion 12 provided with an inner surface 11 that abuts against the outer peripheral surface of the taper member 7. As the taper member 7 moves along the rod 4 by the screw action as the rotation of the taper member 7, the outer peripheral surface of the taper member 7 pushes the inner surface 11 of the contact portion 12, whereby the outer peripheral surface 15 of the contact portion 12 is moved. The anchor is pressed against the inner peripheral surface 2a of the mounting hole 2 The tape is fixed to the inner peripheral surface 2a of the mounting hole 2, and the taper member 7 is divided into a plurality of taper pieces 7a and 7b by divided surfaces 18 and 19, and the divided surfaces 18 and 19 is formed so as to pass through the female screw 6 of the taper member 7, whereby the taper pieces 7 a and 7 b have female screw portions 6 a and 6 b, respectively, and the divided surfaces of the taper pieces 7 a and 7 b facing each other. 18 and 19 are provided with at least a pair of convex portions 20 and concave portions 21 that are engaged with each other. The convex portions 20 have a columnar shape or a quadrangular prism shape, and the shape of the concave portion 21 is set accordingly. and which, so as to sandwich the male thread 3 of the rod 4 by the female screw portion 6a · 6b of the tapered piece 7a · 7b, by engaging the protrusion 20 and the recess 21 to be paired with each other, the rod 4 Internal thread 6 of the tapered member 7 to the screw 3, characterized in that the adapted screwed.
ここでの壁面１には、岩壁やトンネルなどの土木構造物や建築物の天井および側壁などの壁面が含まれる。ここでは、テーパー部材７の外周面がアンカーボルトの基端側ほど径が小さくなる、例えば円錐面形状になっていて、当接部１２の内面１１が、そのテーパー部材７の外周面に合わせて逆円錐面形状になっている場合や、テーパー部材７の外周面に、基端側に向かうに従ってテーパー部材７の中心軸に近づくように傾斜している平面形状の傾斜面１０を設け、当接部１２の内面１１が、テーパー部材７の傾斜面１０に面接触可能な傾斜平面形状になっている場合などが含まれる。テーパー片７ａ・７ｂは、三つ以上である場合も含まれる。 The wall surface 1 here includes civil engineering structures such as rock walls and tunnels, and wall surfaces such as ceilings and side walls of buildings. Here, the outer peripheral surface of the taper member 7 has a smaller diameter toward the proximal end side of the anchor bolt, for example, has a conical surface shape, and the inner surface 11 of the contact portion 12 is aligned with the outer peripheral surface of the taper member 7. In the case of an inverted conical surface shape, or on the outer peripheral surface of the taper member 7, a flat inclined surface 10 that is inclined so as to approach the central axis of the taper member 7 toward the proximal end side is provided and contacted. The case where the inner surface 11 of the part 12 has an inclined plane shape that can come into surface contact with the inclined surface 10 of the taper member 7 is included. The case where there are three or more taper pieces 7a and 7b is also included.
またここでは、当接部１２の外周面１５が取付孔２の内周面２ａに面接触状態で押し付けられて、その際の摩擦でアンカーボルトが取付孔２の内周面２ａに固定される場合や、当接部１２の一部が取付孔２の内周面２ａに食い込むことで、アンカーボルトが取付孔２の内周面２ａに固定される場合などが含まれる。凸部２０は、円柱形状や四角柱形状の形状のものが含まれ、それに合わせて凹部２１の形状が設定される。 Here, the outer peripheral surface 15 of the contact portion 12 is pressed against the inner peripheral surface 2a of the mounting hole 2 in a surface contact state, and the anchor bolt is fixed to the inner peripheral surface 2a of the mounting hole 2 by friction at that time. The case includes a case where the anchor bolt is fixed to the inner peripheral surface 2 a of the mounting hole 2 by part of the contact portion 12 biting into the inner peripheral surface 2 a of the mounting hole 2. Ridge 20, include the cylindrical shape or square pole shape shape, the shape of the recess 21 is set accordingly.
詳しくは、凸部２０が凹部２１に対して外れない程度に圧入されるようになっているものとすることができる。 Specifically, the protrusion 20 can be press-fitted so as not to be detached from the recess 21.
ここでは、例えば、作業者が直接手で、または工具などを使ってテーパー片７ａ・７ｂの分割面１８・１９どうしを押し付け合うことで、凸部２０が凹部２１に圧入される場合などが該当する。 Here, for example, the case where the convex portion 20 is press-fitted into the concave portion 21 by the operator directly pressing the divided surfaces 18 and 19 of the tapered pieces 7a and 7b with a hand or the like is applicable. To do.
本発明のアンカーボルトは、テーパー部材７を複数個のテーパー片７ａ・７ｂに分割していて、そのテーパー片７ａ・７ｂの雌ねじ部分７ａ・７ｂによってロッド４の雄ねじ３を挟むとともに凸部２０を凹部２１に嵌め込んで当該凸部２０と凹部２１とを互いに係合する。それにより、テーパー片７ａ・７ｂどうしが結合されて一体化して、ロッド４の雄ねじ３にテーパー部材７の雌ねじ６が螺合されるので、ロッド４が長くても、そのロッド４の雄ねじ３の中間にテーパー部材７の雌ねじ６を容易、かつ、迅速に螺合させることができる。 In the anchor bolt of the present invention, the taper member 7 is divided into a plurality of taper pieces 7a and 7b, and the male screw 3 of the rod 4 is sandwiched by the female screw portions 7a and 7b of the taper pieces 7a and 7b and the convex portion 20 is formed. The convex part 20 and the concave part 21 are engaged with each other by fitting into the concave part 21. Thereby, the taper pieces 7a and 7b are joined and integrated, and the female screw 6 of the taper member 7 is screwed into the male screw 3 of the rod 4. Therefore, even if the rod 4 is long, the male screw 3 of the rod 4 The female screw 6 of the taper member 7 can be easily and quickly screwed in the middle.
つまり、例えば、テーパー部材７をロッド４の端（先端あるいは基端）から締め込んで当該テーパー部材７をロッド４の中間位置に配置する場合よりも、そのテーパー部材７の配置のために要する手間および時間を軽減することができ、その結果、アンカーボルトの取付孔２への固定作業の効率化を図ることができる。 That is, for example, it is more troublesome to arrange the taper member 7 than when the taper member 7 is fastened from the end (tip or base end) of the rod 4 and the taper member 7 is arranged at an intermediate position of the rod 4. As a result, it is possible to reduce the time required for fixing the anchor bolt to the mounting hole 2.
しかも、テーパー片７ａ・７ｂどうしを結合する際には、凸部２０と凹部２１とを互いに係合させるので、その結合の際にテーパー片７ａ・７ｂどうしがずれることがなく、各テーパー片７ａ・７ｂの雌ねじ部分６ａ・６ｂをロッド４の雄ねじ３の中間に的確に螺合させることができる。 In addition, when the taper pieces 7a and 7b are coupled, the convex portion 20 and the concave portion 21 are engaged with each other, so that the taper pieces 7a and 7b are not displaced at the time of the coupling. The internal thread portions 6a and 6b of 7b can be accurately screwed into the middle of the external thread 3 of the rod 4.
凸部２０が凹部２１に対して外れない程度に圧入されるようになっていると、あまり強くない力で凸部２０を凹部２１に係合して、テーパー片７ａ・７ｂどうしを一体化することができる。従って、アンカーボルトの施工現場などでテーパー部材７をロッド４の中間位置に容易、かつ、迅速に配置することができ、それによってもアンカーボルトの取付孔２への固定作業の効率化を図ることができる。 When the convex portion 20 is press-fitted so as not to be disengaged from the concave portion 21, the convex portion 20 is engaged with the concave portion 21 with a not so strong force, and the tapered pieces 7a and 7b are integrated. be able to. Therefore, the taper member 7 can be easily and quickly arranged at the intermediate position of the rod 4 at an anchor bolt construction site or the like, thereby improving the efficiency of fixing the anchor bolt to the mounting hole 2. Can do.
本発明に係るアンカーボルトの一実施例を図１ないし図８に基づいて説明する。前記アンカーボルトは、例えばコンクリート製の天井の壁面１に設けた（空けた）取付孔２に差し込んで固定（保持）するようになっている（図８参照）。その取付孔２は、上向きに穿孔することで形成している。 An embodiment of an anchor bolt according to the present invention will be described with reference to FIGS. The anchor bolt is fixed (held) by being inserted into a mounting hole 2 provided in a wall 1 of a ceiling made of concrete, for example (see FIG. 8). The mounting hole 2 is formed by drilling upward.
前記アンカーボルトは、図４に示すように、外周面に雄ねじ３を形成している円柱形状のロッド４と、アンカーボルトを前記取付孔２の円柱面形状の内周面２ａ（図６参照）に固定するための拡開機構５とを有している。その拡開機構５は、ロッド４の先端（図４では上端）近傍と、ロッド４の長さ方向（図４では上下方向）の中間の少なくとも一箇所とに配置している。 As shown in FIG. 4, the anchor bolt includes a cylindrical rod 4 having a male screw 3 on the outer peripheral surface, and a cylindrical inner peripheral surface 2a of the mounting hole 2 (see FIG. 6). And an expansion mechanism 5 for fixing to the head. The spreading mechanism 5 is disposed in the vicinity of the tip of the rod 4 (upper end in FIG. 4) and at least one place in the middle of the length direction of the rod 4 (vertical direction in FIG. 4).
前記拡開機構５には、前記ロッド４の雄ねじ３が螺合する（締め込まれる）雌ねじ６を中心軸に沿って貫通状に設けているとともに基端側（図４では下端側）に向かうに従って中心軸に近づくように傾斜している四個の平面形状の傾斜面１０を外周面に形成しているテーパー部材７と、そのテーパー部材７に外嵌している拡開部材８とを有している。 The expansion mechanism 5 is provided with a female screw 6 that is threaded (tightened) with the male screw 3 of the rod 4 in a penetrating manner along the central axis, and is directed toward the base end side (lower end side in FIG. 4). The taper member 7 has four planar inclined surfaces 10 that are inclined so as to approach the central axis on the outer peripheral surface, and the expanding member 8 that is externally fitted to the taper member 7. doing.
テーパー部材７の外周面は円柱面形状になっていて、そのテーパー部材７の外周面の前後左右の四箇所に前記傾斜面１０を形成している。つまり、それらの傾斜面１０は、テーパー部材７の周方向に等間隔で配置している。なお、テーパー部材７の傾斜面１０は、テーパー部材７の先端（図１では上端）までは形成しておらず、テーパー部材７の傾斜面１０よりも先端側は直立面形状に形成している。 The outer peripheral surface of the taper member 7 has a cylindrical surface shape, and the inclined surfaces 10 are formed at four positions on the front, rear, left and right of the outer peripheral surface of the taper member 7. That is, the inclined surfaces 10 are arranged at equal intervals in the circumferential direction of the taper member 7. The inclined surface 10 of the taper member 7 is not formed up to the tip of the taper member 7 (upper end in FIG. 1), and the tip end side of the tapered member 7 is formed in an upright surface shape. .
前記拡開部材８は、図４に示すように、テーパー部材７の各傾斜面１０に当接（面接触）可能な傾斜面形状の内面１１をそれぞれ有している前後左右の四個の当接部１２と、それらの当接部１２の先端部（図４では上端部）をつないでいる弾性変形可能な架橋部１３とを有している。 As shown in FIG. 4, the expansion member 8 has four front, rear, left, and right abutments each having an inclined surface-shaped inner surface 11 capable of abutting (surface contact) with each inclined surface 10 of the taper member 7. It has the contact part 12 and the bridge | bridging part 13 which can be elastically deformed which has connected the front-end | tip part (FIG. 4 upper end part) of those contact parts 12. As shown in FIG.
各当接部１２の内面１１は、テーパー部材７の各傾斜面１０に面接触している状態（図８の状態）で、アンカーボルトの基端側（図８では下端側）に向かうに従ってアンカーボルト（テーパー部材７）の中心軸に近づくように傾斜している。各当接部１２の内面１１の傾斜角度は、前記テーパー部材７の各傾斜面１０の傾斜角度にほぼ等しくなっている。 The inner surface 11 of each contact portion 12 is in contact with each inclined surface 10 of the taper member 7 (in the state shown in FIG. 8), and the anchor 11 is moved toward the base end side (lower end side in FIG. 8) of the anchor bolt. It inclines so that it may approach the central axis of a volt | bolt (taper member 7). The inclination angle of the inner surface 11 of each contact portion 12 is substantially equal to the inclination angle of each inclined surface 10 of the taper member 7.
前記架橋部１３は、ロッド４の先端側に配置している薄平板状の本体部位１３ａと、その本体部位１３ａの縁から架橋部１３の外方へ斜め下方向に延びたのち、長さ方向の中間で架橋部１３の内方へ屈曲して、その自由端部（図４では下端部）に当接部１２の先端部をつないでいる四枚の薄平板状の接続部位１３ｂとを有している。前記接続部位１３ｂは、その自由端部にかしめや溶接などによって前記当接部１２の先端部をつないでいる。 The bridging portion 13 is a thin plate-like main body portion 13a disposed on the distal end side of the rod 4, and extends from the edge of the main body portion 13a obliquely downward to the outside of the bridging portion 13, and then in the length direction. And four thin plate-like connecting portions 13b that are bent inward of the bridging portion 13 and connect the tip end portion of the abutting portion 12 to the free end portion (lower end portion in FIG. 4). doing. The connecting portion 13b is connected to the free end portion of the contact portion 12 by caulking or welding.
架橋部１３の本体部位１３ａは、平面視でほぼ正方形状になっていて、その四箇所の頂点部（角部）に前記接続部位１３ｂをそれぞれ連設している。架橋部１３の本体部位１３ａの中央部には、ロッド４が挿通可能な円形形状の挿通孔１４を形成している。 The main body portion 13a of the bridging portion 13 has a substantially square shape in plan view, and the connection portions 13b are connected to the four apex portions (corner portions), respectively. A circular insertion hole 14 into which the rod 4 can be inserted is formed in the central portion of the main body portion 13 a of the bridging portion 13.
そして、アンカーボルトを取付孔２内に押し込んだ際には、図６に示すように接続部位１３ｂの中間部が、取付孔２の開口の縁や取付孔２の内周面２ａに当接して、架橋部１３の内方（ロッド４側）へ押されて接続部位１３ｂが弾性変形し、その際の弾性復元力で接続部位１３ｂの中間部や当接部１２が取付孔２の内周面２ａに押し付けられる（図７の状態）。それによって拡開部材８は、取付孔２から容易には抜けない程度に取付孔２の内周面２ａに保持（仮固定）される。 When the anchor bolt is pushed into the mounting hole 2, the intermediate portion of the connection portion 13b comes into contact with the opening edge of the mounting hole 2 or the inner peripheral surface 2a of the mounting hole 2 as shown in FIG. The connecting portion 13b is elastically deformed by being pushed inward of the bridging portion 13 (on the rod 4 side), and the intermediate portion of the connecting portion 13b and the contact portion 12 are the inner peripheral surface of the mounting hole 2 by the elastic restoring force at that time. 2a (the state of FIG. 7). As a result, the spreading member 8 is held (temporarily fixed) on the inner peripheral surface 2a of the mounting hole 2 so as not to be easily removed from the mounting hole 2.
各当接部１２の外周面１５は、取付孔２の内周面２ａと同様の円柱面形状に形成しており、それによって各当接部１２の外周面１５が取付孔２の内周面２ａに面接触可能になっている。当接部１２の内面１１は、当該当接部１２の先端（図４では上端）や基端（図４では下端）までは傾斜状に形成していなくてもよい。 The outer peripheral surface 15 of each contact portion 12 is formed in the same cylindrical surface shape as the inner peripheral surface 2 a of the mounting hole 2, whereby the outer peripheral surface 15 of each contact portion 12 is the inner peripheral surface of the mounting hole 2. Surface contact is possible with 2a. The inner surface 11 of the contact portion 12 may not be formed in an inclined shape up to the distal end (upper end in FIG. 4) or the base end (lower end in FIG. 4).
前記ロッド４には、不図示の設備機器や配管などが取り付けられる。ロッド４およびテーパー部材７は、ステンレススチールなどで形成してある。拡開部材８の各当接部１２は、アルミニウム合金などで形成してあり、前記架橋部１３は、ステンレススチールなどで形成してある。 The rod 4 is attached with equipment and piping (not shown). The rod 4 and the taper member 7 are made of stainless steel or the like. Each contact portion 12 of the spreading member 8 is formed of an aluminum alloy or the like, and the bridging portion 13 is formed of stainless steel or the like.
前記拡開部材８の各当接部１２の外周面１５の下部（自由端側）には、複数本（本実施例では二本）の溝１６を当該当接部１２の長さ方向（図４では上下方向）に並べて形成しており、その溝１６は、各当接部１２の外周面１５の周方向へ延びている。 A plurality of (two in this embodiment) grooves 16 are formed in the length direction of the abutting portion 12 (see FIG. 2) in the lower portion (free end side) of the outer peripheral surface 15 of each abutting portion 12 of the expanding member 8. 4, the grooves 16 extend in the circumferential direction of the outer peripheral surface 15 of each contact portion 12.
アンカーボルトのテーパー部材７は、図１ないし図３に示す分割面１８・１９で二個のテーパー片７ａ・７ｂに分割している（半割りしている）。その分割面１８・１９は、テーパー部材７の雌ねじ６の中心軸を通るように形成している。つまり、前記雌ねじ６は、一方のテーパー片７ａの雌ねじ部分６ａと、他方のテーパー片７ｂの雌ねじ部分６ｂとに分割されている。 The taper member 7 of the anchor bolt is divided into two tapered pieces 7a and 7b (divided in half) at the dividing surfaces 18 and 19 shown in FIGS. The split surfaces 18 and 19 are formed so as to pass through the central axis of the female screw 6 of the taper member 7. That is, the female screw 6 is divided into a female screw portion 6a of one tapered piece 7a and a female screw portion 6b of the other tapered piece 7b.
向かい合うテーパー片７ａ・７ｂの分割面１８・１９には、互いに係合する凸部２０および凹部２１を四対配置している。つまり、それらの凸部２０および凹部２１の対は、前記雌ねじ部分６ａ・６ｂを挟んで両側であって当該テーパー部材７の先端側と基端側との四箇所に配置している。なお、図２および図３では、一方のテーパー片７ａの分割面１８に凸部２０および凹部２１を配置するとともに、それに合わせて凹部２１および凸部２０を他方のテーパー片７ｂの分割面１９に配置しているが、例えば、凸部２０または凹部２１のうちのいずれか一方を、一方のテーパー片７ａの分割面１８のみに配置するとともに、凸部２０または凹部２１のうちの他方を、他方のテーパー片７ｂの分割面１９のみに配置してもよい。また、前記分割面１８・１９には、凸部２０および凹部２１の対を一箇所や二箇所のみ配置してもよく、または三箇所あるいは五箇所以上配置してもよい。 Four pairs of convex portions 20 and concave portions 21 that engage with each other are arranged on the dividing surfaces 18 and 19 of the tapered pieces 7a and 7b facing each other. That is, the pair of the convex portion 20 and the concave portion 21 is arranged at four positions on both sides of the female screw portions 6a and 6b, that is, the distal end side and the proximal end side of the taper member 7. In FIGS. 2 and 3, the convex portion 20 and the concave portion 21 are arranged on the dividing surface 18 of one tapered piece 7a, and the concave portion 21 and the convex portion 20 are arranged on the dividing surface 19 of the other tapered piece 7b accordingly. Although it arrange | positions, for example, while arrange | positioning any one of the convex part 20 or the recessed part 21 only in the division surface 18 of one taper piece 7a, the other of the convex part 20 or the recessed part 21 is made the other You may arrange | position only to the division surface 19 of this taper piece 7b. Further, only one or two pairs of convex portions 20 and concave portions 21 may be arranged on the dividing surfaces 18 and 19, or three or five or more locations may be arranged.
そして、各対の凸部２０を凹部２１に対して容易には外れない程度に圧入することで、一方のテーパー片７ａの分割面１８と他方のテーパー片７ｂの分割面１９とが互いに重ね合わされた状態で結合して一体化される（図２および図３で示す状態）。なお、前記分割面１８・１９は、図２および図３に示すように、前記傾斜面１０から外れた位置に形成することが好ましい。また、一方のテーパー片７ａと他方のテーパー片７ｂとを一体化したのちに、当該テーパー部材７の外周に、環状の合成ゴムやばね鋼をＣ字状に曲げ加工したリングばねなどを外嵌することで、一方のテーパー片７ａと他方のテーパー片７ｂとをより離れ難くしてもよい。 Then, the pair of convex portions 20 are press-fitted to the concave portion 21 so as not to be easily removed, so that the divided surface 18 of one tapered piece 7a and the divided surface 19 of the other tapered piece 7b are overlapped with each other. In this state, they are combined and integrated (the state shown in FIGS. 2 and 3). In addition, it is preferable to form the said dividing surfaces 18 and 19 in the position remove | deviated from the said inclined surface 10, as shown to FIG. 2 and FIG. In addition, after integrating one taper piece 7a and the other taper piece 7b, a ring spring or the like obtained by bending an annular synthetic rubber or spring steel into a C-shape is fitted around the outer periphery of the taper member 7 By doing so, you may make it difficult to separate one taper piece 7a and the other taper piece 7b.
次に、前記拡開機構５のアンカーボルトへの配置について説明すると、例えばロッド４の中間位置（図４の基端側の拡開機構５の配置位置）に拡開機構５を配置する場合には、図５に示すように、一方のテーパー片７ａの分割面１８と、他方のテーパー片７ｂの分割面１９とを向い合せた状態で、一方のテーパー片７ａの雌ねじ部分６ａと他方のテーパー片７ｂの雌ねじ部分６ｂとでロッド４の中間位置を挟み込むようにして（図５の実線図参照）、前記凸部２０と前記凹部２１とを係合することで、ロッド４の雄ねじ３に、一方のテーパー片７ａの雌ねじ部分６ａと他方のテーパー片７ｂの雌ねじ部分６ｂがそれぞれ螺合し、その状態で一方のテーパー片７ａと他方のテーパー片７ｂとが結合して一体化する（図５の仮想線図の状態）。 Next, the arrangement of the expansion mechanism 5 on the anchor bolt will be described. For example, when the expansion mechanism 5 is disposed at an intermediate position of the rod 4 (position of the expansion mechanism 5 on the proximal end side in FIG. 4). 5, the female thread portion 6a of one taper piece 7a and the other taper in the state where the division surface 18 of one taper piece 7a and the division surface 19 of the other taper piece 7b face each other. By engaging the convex portion 20 and the concave portion 21 so as to sandwich the intermediate position of the rod 4 with the female screw portion 6b of the piece 7b (see the solid line diagram in FIG. 5), the male screw 3 of the rod 4 The internal thread portion 6a of one taper piece 7a and the internal thread portion 6b of the other taper piece 7b are screwed together, and in this state, the one taper piece 7a and the other taper piece 7b are coupled and integrated (FIG. 5). Virtual diagram state).
次いで、前記拡開部材８の架橋部１３の本体部位１３ａの挿通孔１４にロッド４をその先端側から通して、当該拡開部材８を前記ロッド４の中間位置まで移動させて前記テーパー部材７に外嵌する。それによって前記ロッド４の中間位置への拡開機構５の配置が完了する。 Next, the rod 4 is passed through the insertion hole 14 of the main body portion 13a of the bridging portion 13 of the expanding member 8 from the distal end side thereof, and the expanding member 8 is moved to an intermediate position of the rod 4 so that the taper member 7 is moved. It fits outside. Thereby, the arrangement of the spreading mechanism 5 at the intermediate position of the rod 4 is completed.
なお、ロッド４の最先端（図４では最上端）側に配置する拡開機構５は、例えば、一方のテーパー片７ａと他方のテーパー片７ｂとを予め一体化したのち、そのテーパー部材７をロッド４に締め込んでもよい。その場合、図４に示すように、ロッド４の先端部がテーパー部材７の先端面（図４では上端面）から突出するまでテーパー部材７をロッド４に締め込むことになる。また、前述のロッド４の中間位置への拡開機構５の配置と同様に、ロッド４の最先端位置を両方のテーパー片７ａ・７ｂで挟み込んで、それらのテーパー片７ａ・７ｂを一体化してもよい。その場合でも、ロッド４の先端部はテーパー部材７の先端面から突出している。 The expanding mechanism 5 disposed on the most distal end (the uppermost end in FIG. 4) side of the rod 4, for example, integrates one taper piece 7 a and the other taper piece 7 b in advance and then moves the taper member 7. It may be fastened to the rod 4. In that case, as shown in FIG. 4, the taper member 7 is fastened to the rod 4 until the tip portion of the rod 4 protrudes from the tip surface of the taper member 7 (upper end surface in FIG. 4). Further, similarly to the arrangement of the expansion mechanism 5 at the intermediate position of the rod 4 described above, the tip end position of the rod 4 is sandwiched between both the taper pieces 7a and 7b, and the taper pieces 7a and 7b are integrated. Also good. Even in that case, the tip of the rod 4 protrudes from the tip of the taper member 7.
その後、拡開部材８の架橋部１３の本体部位１３ａの挿通孔１４にロッド４を通して、前記ロッド４の最先端側に配置しているテーパー部材７に拡開部材８を外嵌する（図４の状態）。それによって前記ロッド４の最先端位置への拡開機構５の配置が完了する。 Thereafter, the rod 4 is passed through the insertion hole 14 of the main body portion 13a of the bridging portion 13 of the spreading member 8, and the spreading member 8 is externally fitted to the taper member 7 arranged on the most distal side of the rod 4 (FIG. 4). State). Thereby, the arrangement of the spreading mechanism 5 at the most distal position of the rod 4 is completed.
その各拡開機構５の配置が完了したアンカーボルトを、ロッド４の先端側を上にした姿勢で前記壁面１の取付孔２に差し込む。その際には、図６に示すように、まずロッド４の最先端位置へ配置した拡開機構５の架橋部１３の接続部位１３ｂの中間部が取付孔２の開口の縁に当接するが、そのアンカーボルトを取付孔２内に強制的に押し込むことで、前記接続部位１３ｂが弾性変形して拡開機構５が取付孔２内に入り込む。同様にロッド４の中間位置に配置している拡開機構５を取付孔２に差し込むときにも、当該拡開機構５の架橋部１３の接続部位１３ｂの中間部が取付孔２の開口の縁に当接するが、アンカーボルトを取付孔２内に強制的に押し込むことで当該拡開機構５が取付孔２内に入り込む。 The anchor bolt in which the arrangement of each of the expansion mechanisms 5 has been completed is inserted into the mounting hole 2 of the wall surface 1 in a posture in which the tip end side of the rod 4 faces up. In that case, as shown in FIG. 6, first, the intermediate part of the connection part 13b of the bridging part 13 of the spreading mechanism 5 arranged at the foremost position of the rod 4 abuts the edge of the opening of the mounting hole 2. By forcibly pushing the anchor bolt into the mounting hole 2, the connecting portion 13 b is elastically deformed and the spreading mechanism 5 enters the mounting hole 2. Similarly, when the expansion mechanism 5 arranged at the intermediate position of the rod 4 is inserted into the attachment hole 2, the intermediate portion of the connection portion 13 b of the bridging portion 13 of the expansion mechanism 5 is the edge of the opening of the attachment hole 2. The expansion mechanism 5 enters the mounting hole 2 by forcibly pushing the anchor bolt into the mounting hole 2.
そして、ロッド４の先端面が取付孔２の上面（奥面）に当接するまでアンカーボルトを押し込む（図７の状態）。その際には、各拡開機構５の接続部位１３ｂの弾性復元力によって、当該接続部位１３ｂの中間部や当接部１２が取付孔２の内周面２ａに押し付けられていて、各拡開機構５の拡開部材８が摩擦などによって取付孔２の内周面２ａに、移動および回転不能に仮固定される。その結果、各拡開機構５の拡開部材８の上下移動や周方向への回転が抑えられる。 And an anchor bolt is pushed in until the front end surface of the rod 4 contacts the upper surface (back surface) of the attachment hole 2 (state of FIG. 7). In that case, the intermediate part and the contact part 12 of the said connection part 13b are pressed against the internal peripheral surface 2a of the attachment hole 2 by the elastic restoring force of the connection part 13b of each expansion mechanism 5, and each expansion is carried out. The expanding member 8 of the mechanism 5 is temporarily fixed to the inner peripheral surface 2a of the mounting hole 2 by movement or the like so as not to move and rotate. As a result, the expansion member 8 of each expansion mechanism 5 can be prevented from vertically moving and rotating in the circumferential direction.
それにより、ロッド４の先端面を前述のように取付孔２の上面に当接させた状態で、ロッド４をその中心軸まわりに回転させた際に、そのロッド４の回転に各拡開機構５のテーパー部材７が連れ立って回転しようとしても、前記仮固定されている各拡開機構５の拡開部材８の当接部１２の内面１１にテーパー部材７の傾斜面１０が面当たりして（当接して）テーパー部材７の回転が抑えられ、テーパー部材７は上下移動のみが許容される。それによってロッド４を所定方向（テーパー部材７が取付孔２の開口側へ移動する方向）へ回転させたときには、テーパー部材７は、回転することなく、ねじ作用で取付孔２の開口側（図７では下側）へ下降（移動）する。 Accordingly, when the rod 4 is rotated around its central axis in a state where the tip surface of the rod 4 is in contact with the upper surface of the mounting hole 2 as described above, each expansion mechanism is caused to rotate the rod 4. Even if the taper member 7 of the taper member 7 tries to rotate together, the inclined surface 10 of the taper member 7 comes into contact with the inner surface 11 of the contact portion 12 of the spreader member 8 of each spreader mechanism 5 that is temporarily fixed. The rotation of the taper member 7 is suppressed (in contact), and the taper member 7 is only allowed to move up and down. Accordingly, when the rod 4 is rotated in a predetermined direction (a direction in which the taper member 7 moves toward the opening side of the mounting hole 2), the taper member 7 does not rotate, and the opening side (see FIG. 7 moves down (moves down).
また、前述のように当接部１２が取付孔２の内周面２ａに押し付けられたときには、その当接部１２の溝１６の上下の縁が取付孔２の内周面２ａに引っ掛かり、それによって前記拡開部材８の接続部位１３ｂによる仮固定と相まって拡開部材８が上下方向へ移動することがより抑えられる。 Further, when the contact portion 12 is pressed against the inner peripheral surface 2a of the mounting hole 2 as described above, the upper and lower edges of the groove 16 of the contact portion 12 are caught by the inner peripheral surface 2a of the mounting hole 2, This further suppresses the expansion member 8 from moving in the vertical direction in combination with the temporary fixing by the connection portion 13b of the expansion member 8.
前記テーパー部材７の下降により、テーパー部材７の各傾斜面１０が拡開部材８の各当接部１２の内面１１に押し当たって、各当接部１２を取付孔２の内周面２ａ側へ移動させて、各当接部１２の外周面１５を取付孔２の内周面２ａにしっかりと押し付ける。その結果、各当接部１２の外周面１５と取付孔２の内周面２ａとの面どうしの摩擦などによって、アンカーボルトを取付孔２に確実に固定することができる。 As the taper member 7 is lowered, each inclined surface 10 of the taper member 7 presses against the inner surface 11 of each contact portion 12 of the expanding member 8, and each contact portion 12 is moved to the inner peripheral surface 2 a side of the mounting hole 2. The outer peripheral surface 15 of each contact portion 12 is firmly pressed against the inner peripheral surface 2a of the attachment hole 2. As a result, the anchor bolt can be securely fixed to the mounting hole 2 by friction between the outer peripheral surface 15 of each contact portion 12 and the inner peripheral surface 2 a of the mounting hole 2.
そのアンカーボルトのロッド４の雄ねじ３に、不図示の設備機器や配管などを固定するためのブラケット２３（図８）を装着し、そのブラケット２３の下側にナット２４（図８）を螺着する。そして、レンチ（スパナ）などの工具でナット２４を締め付けて、ブラケット２３をアンカーボルトに取り付ける（図８の状態）。 A bracket 23 (FIG. 8) for fixing equipment and piping (not shown) is attached to the male screw 3 of the rod 4 of the anchor bolt, and a nut 24 (FIG. 8) is screwed to the lower side of the bracket 23. To do. And nut 24 is tightened with tools, such as a wrench (spanner), and bracket 23 is attached to an anchor bolt (state of Drawing 8).
そのナット２４を締め付けた際には、ロッド４が下方へ引っ張られ、そのロッド４およびテーパー部材７が更に下降する。それにより、テーパー部材７の各傾斜面１０によって各当接部１２の内面１１が取付孔２の内周面２ａ側へ更に押され、各当接部１２の外周面１５が取付孔２の内周面２ａに強く押し付けられて、アンカーボルトが取付孔２によりしっかりと固定される。なお、ブラケット２３を省略して座金（不図示）をナット２４の上側に装着してもよい。 When the nut 24 is tightened, the rod 4 is pulled downward, and the rod 4 and the taper member 7 are further lowered. As a result, the inner surface 11 of each contact portion 12 is further pushed toward the inner peripheral surface 2 a side of the mounting hole 2 by each inclined surface 10 of the taper member 7, and the outer peripheral surface 15 of each contact portion 12 is within the mounting hole 2. The anchor bolt is firmly fixed to the mounting surface 2 by being strongly pressed against the peripheral surface 2a. The bracket 23 may be omitted and a washer (not shown) may be mounted on the nut 24.
その取付孔２に固定されたアンカーボルトのロッド４が、前記設備機器などの重量によって下方に引っ張られても、それに伴ってテーパー部材７の各傾斜面１０が各当接部１２の内面１１を強く押すので、各当接部１２の外周面１５が取付孔２の内周面２ａに強く押し付けられる。それによって、アンカーボルトが取付孔２から抜け出ることを確実に防止することができる。 Even if the anchor bolt rod 4 fixed to the mounting hole 2 is pulled downward due to the weight of the equipment or the like, the inclined surfaces 10 of the taper member 7 move along the inner surfaces 11 of the contact portions 12 accordingly. Since it pushes strongly, the outer peripheral surface 15 of each contact part 12 is strongly pressed against the inner peripheral surface 2a of the attachment hole 2. Thereby, it is possible to reliably prevent the anchor bolt from coming out of the mounting hole 2.
このように、アンカーボルトのテーパー部材７を二つのテーパー片７ａ・７ｂに分割しているので、例えばロッド４の中間位置をこれらのテーパー片７ａ・７ｂで挟み込んで一体化することで、当該ロッド４の中間位置にテーパー部材７を容易、かつ、迅速に配置することができる。 Thus, since the taper member 7 of the anchor bolt is divided into two taper pieces 7a and 7b, for example, the intermediate position of the rod 4 is sandwiched and integrated by these taper pieces 7a and 7b. The taper member 7 can be easily and quickly arranged at the intermediate position 4.
つまり、例えば、テーパー部材７をロッド４の端（先端あるいは基端）から締め込んで当該テーパー部材７をロッド４の中間位置に配置する場合よりも、そのテーパー部材７の配置のために要する手間および時間を軽減することができ、その結果、アンカーボルトの前記取付孔２への固定作業の効率化を図ることができる。 That is, for example, it is more troublesome to arrange the taper member 7 than when the taper member 7 is fastened from the end (tip or base end) of the rod 4 and the taper member 7 is arranged at an intermediate position of the rod 4. As a result, the efficiency of fixing the anchor bolt to the mounting hole 2 can be increased.
１ 壁面
２ 壁面の取付孔
２ａ 取付孔の内周面
３ ロッドの雄ねじ
４ ロッド
５ 拡開機構
６ テーパー部材の雌ねじ
６ａ 一方のテーパー片の雌ねじ部分
６ｂ 他方のテーパー片の雌ねじ部分
７ テーパー部材
７ａ 一方のテーパー片
７ｂ 他方のテーパー片
８ 拡開部材
１０ テーパー部材の傾斜面
１１ 当接部の内面
１２ 当接部
１４ 拡開部材の挿通孔
１５ 当接部の外周面
１８ 一方のテーパー片の分割面
１９ 他方のテーパー片の分割面
２０ 凸部
２１ 凹部
DESCRIPTION OF SYMBOLS 1 Wall surface 2 Wall mounting hole 2a Inner peripheral surface of mounting hole 3 Rod male screw 4 Rod 5 Expanding mechanism 6 Female thread of taper member 6a Female thread portion of one taper piece 6b Female screw portion of the other taper piece 7 Taper member 7a One Taper piece 7b other taper piece 8 expanding member 10 inclined surface of taper member 11 inner surface of abutting portion 12 abutting portion 14 insertion hole of expanding member 15 outer peripheral surface of abutting portion 18 split surface of one taper piece 19 Split surface of the other taper piece 20 Convex part 21 Concave part
Claims (2)
円柱面状の外周面に雄ねじ（３）を形成しているロッド（４）と、そのロッド（４）の雄ねじ（３）に螺合する雌ねじ（６）を中心軸に沿って形成しているテーパー部材（７）と、そのテーパー部材（７）に外嵌する拡開部材（８）とを有していて、前記テーパー部材（７）および前記拡開部材（８）は、前記ロッド（４）の長さ方向の中間に配置可能になっており、
前記拡開部材（８）は、前記テーパー部材（７）の外周面に当接する内面（１１）を設けている当接部（１２）を有していて、前記ロッド（４）の回転に伴って前記テーパー部材（７）がねじ作用で前記ロッド（４）に沿って移動することで、前記テーパー部材（７）の外周面が前記当接部（１２）の内面（１１）を押し、それによって前記当接部（１２）の外周面（１５）が前記取付孔（２）の内周面（２ａ）に押し付けられて、前記アンカーボルトが前記取付孔（２）の内周面（２ａ）に固定されるようになっており、
前記テーパー部材（７）は、分割面（１８）・（１９）によって複数個のテーパー片（７ａ）・（７ｂ）に分割しており、
その分割面（１８）・（１９）は、前記テーパー部材（７）の雌ねじ（６）を通るように形成していて、それによって前記各テーパー片（７ａ）・（７ｂ）には、雌ねじ部分（６ａ）・（６ｂ）をそれぞれ有しており、
向かい合うテーパー片（７ａ）・（７ｂ）の分割面（１８）・（１９）どうしには、互いに係合する少なくとも一対の凸部（２０）および凹部（２１）を配置しており、
前記凸部（２０）は、円柱形状または四角柱形状であり、それに合わせて前記凹部（２１）の形状が設定されており、
前記テーパー片（７ａ）・（７ｂ）の前記雌ねじ部分（６ａ）・（６ｂ）によって前記ロッド（４）の雄ねじ（３）を挟むようにして、対になる前記凸部（２０）と前記凹部（２１）とを互いに係合することで、前記ロッド（４）の雄ねじ（３）に前記テーパー部材（７）の雌ねじ（６）が螺合するようになっていることを特徴とするアンカーボルト。 An anchor bolt for fixing to a mounting hole (2) provided in the wall surface (1),
A rod (4) forming a male screw (3) on a cylindrical outer peripheral surface and a female screw (6) screwed to the male screw (3) of the rod (4) are formed along the central axis. It has a taper member (7) and an expansion member (8) that fits outside the taper member (7). The taper member (7) and the expansion member (8) are connected to the rod (4). ) In the middle of the length direction,
The expanding member (8) has an abutting portion (12) provided with an inner surface (11) that abuts on the outer peripheral surface of the tapered member (7), and the rod (4) is rotated. The taper member (7) is moved along the rod (4) by a screw action so that the outer peripheral surface of the taper member (7) pushes the inner surface (11) of the contact portion (12), As a result, the outer peripheral surface (15) of the contact portion (12) is pressed against the inner peripheral surface (2a) of the mounting hole (2), and the anchor bolt is moved to the inner peripheral surface (2a) of the mounting hole (2). It is supposed to be fixed to
The taper member (7) is divided into a plurality of taper pieces (7a) and (7b) by dividing surfaces (18) and (19).
The dividing surfaces (18) and (19) are formed so as to pass through the female screw (6) of the taper member (7), whereby each of the taper pieces (7a) and (7b) has a female screw portion. (6a) and (6b) respectively,
At least a pair of convex portions (20) and concave portions (21) that engage with each other are arranged between the divided surfaces (18) and (19) of the tapered pieces (7a) and (7b) facing each other,
The convex portion (20) has a columnar shape or a quadrangular prism shape, and the shape of the concave portion (21) is set in accordance therewith,
The convex part (20) and the concave part (21) paired so that the male thread (3) of the rod (4) is sandwiched between the female thread parts (6a) and (6b) of the taper pieces (7a) and (7b). ) Are engaged with each other, so that the female screw (6) of the taper member (7) is engaged with the male screw (3) of the rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014132658A JP6374235B2 (en) | 2014-06-27 | 2014-06-27 | Anchor bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014132658A JP6374235B2 (en) | 2014-06-27 | 2014-06-27 | Anchor bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2016011692A JP2016011692A (en) | 2016-01-21 |
| JP6374235B2 true JP6374235B2 (en) | 2018-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014132658A Expired - Fee Related JP6374235B2 (en) | 2014-06-27 | 2014-06-27 | Anchor bolt |
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| JP (1) | JP6374235B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4483645A (en) * | 1982-02-16 | 1984-11-20 | Birmingham Bolt Company | Combination expansion shell and resin secured mine roof anchor assembly |
| JPH08145031A (en) * | 1994-11-16 | 1996-06-04 | Hirata Kogyo Kk | Split nut and manufacture thereof |
| DE19740823A1 (en) * | 1997-09-17 | 1999-03-18 | Hilti Ag | Expansion dowels |
| DE10134604A1 (en) * | 2001-07-17 | 2003-02-06 | Hilti Ag | expansion anchor |
| JP3094683U (en) * | 2002-12-16 | 2003-07-04 | 智敏 和田 | Disassembled nut |
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| JP2016011692A (en) | 2016-01-21 |
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