JP6584890B2 - Anchor bolt with reverse rotation prevention mechanism - Google Patents

Anchor bolt with reverse rotation prevention mechanism Download PDF

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JP6584890B2
JP6584890B2 JP2015183893A JP2015183893A JP6584890B2 JP 6584890 B2 JP6584890 B2 JP 6584890B2 JP 2015183893 A JP2015183893 A JP 2015183893A JP 2015183893 A JP2015183893 A JP 2015183893A JP 6584890 B2 JP6584890 B2 JP 6584890B2
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rod
mounting hole
coil spring
reverse rotation
taper member
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JP2017057940A (en
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有希 安藤
有希 安藤
徹 柳井
徹 柳井
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Howa Corp
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Howa Corp
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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取付孔の開口に差し込んで当該取付孔に固定する逆転防止機構付きアンカーボルトに関するものである。   The present invention relates to an anchor bolt with a reverse rotation prevention mechanism that is inserted into an opening of an attachment hole provided in a wall surface such as a rock wall surface or a concrete ceiling, and fixed to the attachment hole.

アンカーボルトとしては、例えば特許文献1で示すように構成したものが提案されている。そのアンカーボルトには、設備機器や配管などを取り付け可能なロッドと、そのロッドの雄ねじに螺着する雌ねじを貫通状に形成しているテーパー部材とを有している。   As an anchor bolt, what was comprised as shown, for example in patent document 1 is proposed. The anchor bolt has a rod to which equipment or piping can be attached, and a taper member in which a female screw that is screwed to the male screw of the rod is formed in a penetrating manner.

そのテーパー部材の外周には軸方向に対して斜めに延びる傾斜面を形成しており、またテーパー部材には拡開部材を外嵌している。その拡開部材には、テーパー部材の傾斜面に面接触可能な傾斜面状の内面を形成している当接部を有している。   An inclined surface extending obliquely with respect to the axial direction is formed on the outer periphery of the taper member, and an expanding member is fitted on the taper member. The expanding member has an abutting portion forming an inclined inner surface that can come into surface contact with the inclined surface of the tapered member.

そして、ロッドに螺着したテーパー部材に拡開部材(当接部)を外嵌した状態で、当該アンカーボルトを前記取付孔の奥まで差し込んだのち、例えばロッドを引っ張って取付孔の開口側に移動させることで、拡開部材の当接部がテーパー部材の傾斜面に押されて取付孔の内周面に押し付けられる。   Then, with the expanding member (contact portion) fitted on the taper member screwed to the rod, the anchor bolt is inserted into the mounting hole, and then the rod is pulled to the opening side of the mounting hole. By moving, the contact portion of the spreading member is pressed against the inclined surface of the taper member and pressed against the inner peripheral surface of the mounting hole.

その結果、当接部の外周面と取付孔の内周面との間の摩擦などによってアンカーボルトが取付孔に固定される。なお、その際には拡開部材(当接部)は、前記取付孔の内周面に引っかかるなどによってテーパー部材に連れ立って取付孔の開口側に移動することが抑えられている。   As a result, the anchor bolt is fixed to the mounting hole by friction between the outer peripheral surface of the contact portion and the inner peripheral surface of the mounting hole. In this case, the expanding member (contact portion) is restrained from moving to the opening side of the mounting hole along with the taper member by being caught on the inner peripheral surface of the mounting hole.

特開2015−87003号公報Japanese Patent Laying-Open No. 2015-87003

前記アンカーボルトにあっては、例えば、前記ロッドに取り付けた設備機器などが振動すると、その振動に伴ってロッドが回転する場合がある。その場合、ロッドの回転方向によっては、ねじ作用でテーパー部材が取付孔の奥側に移動し、当接部の内面に対するテーパー部材の傾斜面の押す力が低下してロッドが振動し易くなる。   In the anchor bolt, for example, when equipment equipment attached to the rod vibrates, the rod may rotate with the vibration. In this case, depending on the rotation direction of the rod, the taper member moves to the back side of the mounting hole due to the screw action, and the pushing force of the inclined surface of the taper member against the inner surface of the abutting portion decreases, and the rod easily vibrates.

その結果、前記設備機器などがさらに大きく振動し、その振動によって騒音や設備機器などのがたつきなどを招いてしまうといった問題がある。   As a result, there is a problem that the equipment and the like vibrate further, and the vibrations cause noise and rattling of the equipment and the like.

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、取付孔に対するアンカーボルトの固定状態を確実に維持することができる逆転防止機構付き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 with a reverse rotation prevention mechanism that can reliably maintain the anchor bolt fixed to the mounting hole.

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の開口に差し込んで取付孔2に固定する逆転防止機構付きアンカーボルトであって、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が螺着する雌ねじ6を形成しているテーパー部材7と、テーパー部材7に外嵌する当接部12と、ロッド4の逆転を抑える逆転防止機構とを有しており、テーパー部材7の外周面には、テーパー部材7の中心軸に近づくように傾斜している傾斜面10を形成しており、取付孔2の開口に差し込んだテーパー部材7を取付孔2の開口側に移動させることで、当接部12が、テーパー部材7の傾斜面10によって取付孔2の内周面2a側に押されて取付孔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に固定されるようになっており、逆転防止機構は、ロッド4が正転してねじ作用でテーパー部材7が取付孔2の開口側に移動することを許容する一方で、ロッド4の逆転を抑えることを特徴とする。   In order to solve such inconvenience, the present invention is an anchor bolt with a reverse rotation prevention mechanism which is inserted into the opening of the mounting hole 2 provided in the wall surface 1 and fixed to the mounting hole 2, and the male screw 3 is formed on the outer peripheral surface. The rod 4, the taper member 7 forming the female screw 6 to which the male screw 3 of the rod 4 is screwed, the contact portion 12 fitted on the taper member 7, and the reverse rotation prevention mechanism for suppressing the reverse rotation of the rod 4. And an inclined surface 10 that is inclined so as to approach the central axis of the taper member 7 is formed on the outer peripheral surface of the taper member 7, and the taper member 7 inserted into the opening of the attachment hole 2 is attached. By moving to the opening side of the hole 2, the contact portion 12 is pushed toward the inner peripheral surface 2 a side of the mounting hole 2 by the inclined surface 10 of the taper member 7 and pressed against the inner peripheral surface 2 a of the mounting hole 2. The anchor bolt is fixed to the mounting hole 2. The reverse rotation prevention mechanism allows the rod 4 to rotate forward and allow the taper member 7 to move to the opening side of the mounting hole 2 by a screw action, while suppressing the reverse rotation of the rod 4. Features.

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。ここでの逆転防止機構としては、ロッド4の雄ねじ3にコイルバネなどのバネを嵌合させて、そのコイルバネなどでロッド4の逆転を抑えるものや、ロッド4の雄ねじ3に楔状のワッシャを嵌めて、そのワッシャでロッド4の逆転を抑えるものなどが該当する。   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. As the reverse rotation prevention mechanism here, a spring such as a coil spring is fitted to the male screw 3 of the rod 4 and the reverse rotation of the rod 4 is suppressed by the coil spring or the like, or a wedge-shaped washer is fitted to the male screw 3 of the rod 4. In this case, the washer that suppresses the reverse rotation of the rod 4 is applicable.

具体的には、前記逆転防止機構は、コイルバネ17からなり、コイルバネ17のバネ本体17aは、ロッド4の雄ねじ3のねじ溝3aに嵌合しており、コイルバネ17の一端部17bは、テーパー部材7に係止されており、コイルバネ17の他端部17cは、バネ本体17aからロッド4の径方向へ延びており、そのコイルバネ17は、ロッド4が正転するときにはバネ本体17aが径方向に広がって、テーパー部材7が取付孔2の開口側に移動することを許容する一方で、ロッド4が逆転するときにはバネ本体17aが径方向に縮まって、ロッド4の逆転を抑える。   Specifically, the reverse rotation prevention mechanism includes a coil spring 17, a spring main body 17 a of the coil spring 17 is fitted in the thread groove 3 a of the male screw 3 of the rod 4, and one end portion 17 b of the coil spring 17 is a tapered member. 7 and the other end 17c of the coil spring 17 extends in the radial direction of the rod 4 from the spring body 17a. The coil spring 17 is configured so that the spring body 17a is in the radial direction when the rod 4 rotates forward. While expanding and allowing the taper member 7 to move toward the opening side of the mounting hole 2, when the rod 4 reverses, the spring body 17 a contracts in the radial direction to suppress the reverse rotation of the rod 4.

ここでのコイルバネ17の一端部17bには、テーパー部材7の先端面7aなどに設けた孔や溝や切欠きなどに係止される場合や、テーパー部材7の先端面7aに設けた突起などに押し当たって係止される場合などが該当する。コイルバネ17は、テーパー部材7よりも先端側に突出しているロッド4の箇所に配置する場合と、テーパー部材7よりも基端側のロッド4の箇所に配置する場合とが含まれる。ここでは、コイルバネ17の他端部17cが、ロッド4の中心軸側からテーパー部材7の先端面7aの縁へ真っ直ぐ延びている場合や、ロッド4の中心軸に対して斜めに延びている場合や、湾曲しながら延びている場合などが含まれる。   Here, the one end portion 17b of the coil spring 17 is locked to a hole, groove, notch or the like provided on the tip end surface 7a of the taper member 7, or a protrusion provided on the tip end surface 7a of the taper member 7 or the like. This is the case when it is pressed and locked. The coil spring 17 includes a case where the coil spring 17 is disposed at the position of the rod 4 protruding to the distal end side from the taper member 7 and a case where the coil spring 17 is disposed at the position of the rod 4 on the proximal end side from the taper member 7. Here, the other end portion 17 c of the coil spring 17 extends straight from the central axis side of the rod 4 to the edge of the tip end surface 7 a of the taper member 7, or extends obliquely with respect to the central axis of the rod 4. And the case where it extends while curving.

詳しくは、ロッド4の先端部4aが、テーパー部材7の先端面7aから突出していて、ロッド4の先端部4aの雄ねじ3のねじ溝3aにコイルバネ17のバネ本体17aが嵌合しており、コイルバネ17の一端部17bは、折れ曲がってテーパー部材7の先端面7aに形成している係止孔18に差し込まれて係止されており、コイルバネ17の他端部17cは、バネ本体17aからテーパー部材7の先端面7aに沿ってロッド4の径方向へ延びている。   Specifically, the tip 4 a of the rod 4 protrudes from the tip surface 7 a of the taper member 7, and the spring body 17 a of the coil spring 17 is fitted in the thread groove 3 a of the male screw 3 of the tip 4 a of the rod 4. One end portion 17b of the coil spring 17 is bent and inserted and locked in a locking hole 18 formed in the distal end surface 7a of the taper member 7, and the other end portion 17c of the coil spring 17 is tapered from the spring body 17a. The rod 4 extends in the radial direction along the distal end surface 7 a of the member 7.

より詳しくは、コイルバネ17の他端部17cは、平面視でテーパー部材7の先端面7aよりも外方へは突出していない。   More specifically, the other end 17c of the coil spring 17 does not protrude outward from the tip end surface 7a of the taper member 7 in plan view.

本発明の逆転防止機構付きアンカーボルトでは、逆転防止機構が、ロッド4が正転してねじ作用でテーパー部材7が取付孔2の開口側に移動することを許容する一方で、ロッド4の逆転を抑えるので、例えばロッド4に取り付けた設備機器などの振動に伴ってロッド4が逆転しようとしても、前記逆転防止機構によって前記逆転が抑えられる。   In the anchor bolt with the reverse rotation prevention mechanism of the present invention, the reverse rotation prevention mechanism allows the rod 4 to rotate forward and allow the taper member 7 to move to the opening side of the mounting hole 2 by the screw action, while the rod 4 rotates backward. Therefore, even if the rod 4 tries to reverse with vibrations of equipment or the like attached to the rod 4, for example, the reverse rotation is suppressed by the reverse rotation prevention mechanism.

それにより、前記ロッド4の逆転によって、ねじ作用でテーパー部材7が取付孔2の奥側に移動することを抑えることができる。従って、そのテーパー部材7の移動によって当接部12の内面11に対するテーパー部材7の押す力が低下して(テーパー部材7が緩んで)、そのテーパー部材7を介してロッド4が振動し易くなることが抑えられる。その結果、前記設備機器などが大きく振動して、騒音や設備機器などのがたつきなどを招くことを抑えることができる。つまり、取付孔2に対するアンカーボルトの固定状態を確実に維持することができる。   Thereby, it is possible to suppress the taper member 7 from moving to the back side of the mounting hole 2 by the screw action due to the reverse rotation of the rod 4. Therefore, the pushing force of the taper member 7 against the inner surface 11 of the contact portion 12 is reduced by the movement of the taper member 7 (the taper member 7 is loosened), and the rod 4 is likely to vibrate via the taper member 7. It can be suppressed. As a result, it can be suppressed that the equipment and the like vibrate greatly and cause noise and rattling of the equipment and the like. That is, it is possible to reliably maintain the anchor bolt fixed to the mounting hole 2.

一方、前記設備機器などの振動に伴ってロッド4が正転する場合には、その正転に伴って、ねじ作用でテーパー部材7が取付孔2の開口側に移動しようとし、それによって当接部12の内面11に対するテーパー部材7の押す力が強くなり、アンカーボルトが取付孔2の内周面2aによりしっかりと固定され、ロッド4がより振動し難くなる。その結果、取付孔2に対するアンカーボルトの固定状態をより確実に維持することができ、前記設備機器などが振動することがより抑えられて、前記騒音や設備機器などのがたつきなどをより確実に抑えることができる。   On the other hand, when the rod 4 rotates forward with vibration of the equipment or the like, the taper member 7 tries to move to the opening side of the mounting hole 2 by the screw action along with the forward rotation, thereby contacting the rod 4. The pressing force of the taper member 7 against the inner surface 11 of the portion 12 becomes stronger, the anchor bolt is firmly fixed by the inner peripheral surface 2a of the mounting hole 2, and the rod 4 is more difficult to vibrate. As a result, the fixed state of the anchor bolt with respect to the mounting hole 2 can be more reliably maintained, vibration of the equipment and the like can be further suppressed, and rattling of the noise and equipment can be more reliably performed. Can be suppressed.

逆転防止機構がコイルバネ17からなると、部品点数が一個だけで済む分だけ逆転防止機構を低コストで製作することができる。そのコイルバネ17の他端部17cがロッド4の径方向へ延びているので、例えば、そのコイルバネ17の他端部17cを指などで摘んでバネ本体17aが径方向に広がる方向に容易に回すことができる。   If the anti-reverse mechanism is composed of the coil spring 17, the anti-reverse mechanism can be manufactured at a low cost by the amount of parts required. Since the other end portion 17c of the coil spring 17 extends in the radial direction of the rod 4, for example, the other end portion 17c of the coil spring 17 is grasped with a finger or the like, and the spring body 17a is easily rotated in the direction of expanding in the radial direction. Can do.

それにより、例えばロッド4をテーパー部材7から取り外す場合に、前述のようにコイルバネ17の他端部17cを指などで摘んで回すことで、バネ本体17aによるロッド4を締め付ける力が弱まり、ロッド4を容易に逆転させて当該ロッド4をテーパー部材7から取り外すことができる。   Accordingly, for example, when the rod 4 is removed from the taper member 7, the force of tightening the rod 4 by the spring body 17 a is weakened by pinching the other end 17 c of the coil spring 17 with a finger or the like as described above. The rod 4 can be detached from the taper member 7 by easily reversing the rotation.

テーパー部材7の先端面7aから突出するロッド4の先端部4aの雄ねじ3のねじ溝3aにコイルバネ17のバネ本体17aを嵌合すると、ロッド4の先端から当該コイルバネ17のバネ本体17aまでの距離を短くでき、その分だけコイルバネ17のバネ本体17aへのロッド4のねじ込みの量を抑えることができる。それにより、アンカーボルトの組み立ての手間を軽減することができる。   When the spring body 17a of the coil spring 17 is fitted into the thread groove 3a of the male thread 3 of the tip 4a of the rod 4 protruding from the tip surface 7a of the taper member 7, the distance from the tip of the rod 4 to the spring body 17a of the coil spring 17 Accordingly, the amount of screwing of the rod 4 into the spring body 17a of the coil spring 17 can be suppressed by that amount. Thereby, the trouble of assembling the anchor bolt can be reduced.

コイルバネ17の他端部17cが、平面視でテーパー部材7の先端面7aよりも外方へは突出していないと、そのコイルバネ17の他端部17cが当接部12などに干渉することが防がれて、テーパー部材7の傾斜面10を確実に当接部12の内面11に接触させることができる。   If the other end portion 17c of the coil spring 17 does not protrude outward from the tip end surface 7a of the taper member 7 in plan view, the other end portion 17c of the coil spring 17 is prevented from interfering with the contact portion 12 or the like. As a result, the inclined surface 10 of the taper member 7 can be reliably brought into contact with the inner surface 11 of the contact portion 12.

本発明の逆転防止機構付きアンカーボルトの斜視図である。It is a perspective view of an anchor bolt with a reverse rotation prevention mechanism of the present invention. 本発明のアンカーボルトに用いるテーパー部材の斜視図である。It is a perspective view of the taper member used for the anchor bolt of this invention. ロッドにテーパー部材およびコイルばねを装着した側面図である。It is the side view which attached the taper member and the coil spring to the rod. ロッドにテーパー部材およびコイルばねを装着した平面図である。It is a top view which mounted | wore the taper member and the coil spring with the rod. 本発明のアンカーボルトの要部を示す縦断面図である。It is a longitudinal cross-sectional view which shows the principal part of the anchor bolt of this invention. テーパー部材にロッドを組み付ける状態を示す側面図である。It is a side view which shows the state which attaches a rod to a taper member. アンカーボルトを取付孔へ差し込む際の状態を示す断面図である。It is sectional drawing which shows the state at the time of inserting an anchor bolt in a mounting hole. アンカーボルトにブラケットなどを取り付けた状態を示す断面図である。It is sectional drawing which shows the state which attached the bracket etc. to the anchor bolt.

本発明の逆転防止機構付きアンカーボルトの一実施例を説明する。そのアンカーボルトは、図8に示すように、例えば、コンクリート製の天井の壁面1に上向き設けている取付孔2の開口に差し込んで当該取付孔2に固定し、その固定したのちのアンカーボルトに設備機器や配管などを取り付けるようになっている。なお、前記アンカーボルトは、前記設備機器などの取り付けのみならず、岩盤の固定などにも使用することができる。   An embodiment of an anchor bolt with a reverse rotation prevention mechanism of the present invention will be described. As shown in FIG. 8, the anchor bolt is inserted into the opening of the mounting hole 2 provided upward on the wall 1 of the concrete ceiling, for example, and fixed to the mounting hole 2. Equipment and piping are to be installed. In addition, the anchor bolt can be used not only for attaching the equipment and the like but also for fixing a rock mass.

前記アンカーボルトは、図1および図3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8参照)に固定するための拡開機構5とを有している。   As shown in FIGS. 1 and 3, the anchor bolt includes a cylindrical rod 4 having a male screw 3 formed on the outer peripheral surface, and a cylindrical inner peripheral surface 2 a (see FIG. 8) and a spreading mechanism 5 for fixing.

前記拡開機構5は、図2および図3に示すように、軸方向(図3では上下方向)に斜めに延びる五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、図1および図7に示すように、そのテーパー部材7に外嵌する拡開部材8とを有している。つまり、テーパー部材7の各傾斜面10は、基端側(図7では下端側)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とともに、テーパー部材7の周方向に等間隔で配置している。そのテーパー部材7には、その中心軸に沿って前記ロッド4の雄ねじ3が螺着する雌ねじ6を貫通状に形成している。   As shown in FIGS. 2 and 3, the spreading mechanism 5 has a tapered member 7 having five planar inclined surfaces 10 extending obliquely in the axial direction (vertical direction in FIG. 3) on the outer peripheral surface. As shown in FIGS. 1 and 7, it has an expanding member 8 that is externally fitted to the taper member 7. That is, each inclined surface 10 of the taper member 7 is inclined so as to approach the central axis of the taper member 7 toward the base end side (lower end side in FIG. 7), and is equally spaced in the circumferential direction of the taper member 7. It is arranged with. The taper member 7 is formed with a female screw 6 penetrating along the central axis to which the male screw 3 of the rod 4 is screwed.

前記拡開部材8は、図1および図8に示すように、テーパー部材7の各傾斜面10にそれぞれ当接可能な五個の当接部12と、弾性変形可能な架橋部13とを有している。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)に向かうに従ってテーパー部材7の中心軸に近づくように傾斜している。   As shown in FIGS. 1 and 8, the expanding member 8 has five contact portions 12 that can contact each inclined surface 10 of the taper member 7 and a bridging portion 13 that can be elastically deformed. is doing. The inner surface 11 of each contact portion 12 tapers toward the base end side (lower end side in FIG. 8) of the anchor bolt in a state where the inner surface 11 is in surface contact with each inclined surface 10 of the taper member 7 (state in FIG. 8). It inclines so that the central axis of the member 7 may be approached.

前記架橋部13は、図1および図7に示すように、その本体部位13aの縁から五個の接続部位13bがそれぞれ架橋部13の外方へ斜め下方向に延び、長さ方向の中間で架橋部13の内方へ屈曲したのちに当接部12の先端部(図7では上端部)をそれぞれつないでいる。各当接部12の外周面15は、前記取付孔2の内周面2aと同様の円柱面形状に形成していて、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。前記ロッド4と前記テーパー部材7と前記架橋部13とは、ステンレススチールなどで形成してあり、前記各当接部12は、アルミニウム合金などで形成してある。   As shown in FIGS. 1 and 7, the bridging portion 13 has five connecting portions 13b extending obliquely downward from the edge of the main body portion 13a to the outside of the bridging portion 13, respectively. After bending inward of the bridging portion 13, the tip end portion (upper end portion in FIG. 7) of the contact portion 12 is connected. 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, and the outer peripheral surface 15 of each contact portion 12 is the inner peripheral surface 2 a of the mounting hole 2. Surface contact is possible. The rod 4, the taper member 7, and the bridging portion 13 are made of stainless steel or the like, and the contact portions 12 are made of aluminum alloy or the like.

ロッド4の先端部4aは、図3および図5に示すように、テーパー部材7の先端面7aから突出していて、そのロッド4の先端部4aの雄ねじ3のねじ溝3aには、バネ本体17aが弾性的に嵌合するコイルバネ17(逆転防止機構)を配置している。そのコイルバネ17のバネ本体17aのコイル内径は、自由状態(図6の実線図の状態)でロッド4の雄ねじ3の谷径L1以下になっている。   As shown in FIGS. 3 and 5, the tip 4 a of the rod 4 protrudes from the tip surface 7 a of the taper member 7, and the spring body 17 a is inserted into the thread groove 3 a of the male screw 3 of the tip 4 a of the rod 4. A coil spring 17 (reverse rotation prevention mechanism) that fits elastically is disposed. The coil inner diameter of the spring body 17a of the coil spring 17 is equal to or less than the valley diameter L1 of the male screw 3 of the rod 4 in a free state (the state of the solid line in FIG. 6).

それにより、コイルバネ17のバネ本体17aをロッド4の先端部4aの雄ねじ3のねじ溝3aに嵌合させるときには、そのコイルバネ17のバネ本体17aが弾性変形して拡径し、その弾性復元力でバネ本体17aはロッド4の雄ねじ3のねじ溝3aに密着する(図5の状態)。なお、コイルバネ17のバネ本体17aの巻き方向は、ロッド4の雄ねじ3のねじ山の巻き方向と同一方向にしている。   As a result, when the spring body 17a of the coil spring 17 is fitted into the thread groove 3a of the male screw 3 of the tip 4a of the rod 4, the spring body 17a of the coil spring 17 is elastically deformed to expand its diameter, and its elastic restoring force The spring body 17a is in close contact with the thread groove 3a of the male screw 3 of the rod 4 (state shown in FIG. 5). The winding direction of the spring body 17 a of the coil spring 17 is the same as the winding direction of the thread of the male screw 3 of the rod 4.

コイルバネ17の一端部17b(図3および図5では上端側)は、下向き(図3参照)に折れ曲がってテーパー部材7の先端面7a(図3および図5では上端面)に形成している係止孔18に差し込まれて係止されている。コイルバネ17の他端部17c(図3および図5では下端部)は、図4に示すように、バネ本体17aからテーパー部材7の先端面7aに沿ってロッド4の径方向へ延びている一方で、図4の平面視でテーパー部材7の先端面7aよりも外方へは突出していない。   One end 17b (the upper end side in FIGS. 3 and 5) of the coil spring 17 is bent downward (see FIG. 3) and formed on the tip end surface 7a (the upper end surface in FIGS. 3 and 5) of the taper member 7. The stopper hole 18 is inserted and locked. The other end portion 17c (the lower end portion in FIGS. 3 and 5) of the coil spring 17 extends in the radial direction of the rod 4 along the tip surface 7a of the taper member 7 from the spring body 17a, as shown in FIG. Therefore, it does not protrude outward from the tip surface 7a of the taper member 7 in a plan view of FIG.

そして、ロッド4を正転(図4では反時計回り方向)させると、コイルバネ17のバネ本体17aには巻き方向とは逆方向の力が加わり、当該バネ本体17aは径方向に広がる(拡径する)ように弾性変形する。それによってバネ本体17aはロッド4の雄ねじ3のねじ溝3aへの密着が抑えられてロッド4は容易に正転でき、その正転によってねじ作用でテーパー部材7が取付孔2の開口側に移動する。つまり、コイルバネ17は、テーパー部材7が取付孔2の開口側に移動することを許容することになる。   When the rod 4 is rotated forward (counterclockwise in FIG. 4), a force in the direction opposite to the winding direction is applied to the spring body 17a of the coil spring 17, and the spring body 17a expands in the radial direction (expanded diameter). It will be elastically deformed. As a result, the spring body 17a is prevented from sticking to the thread groove 3a of the male screw 3 of the rod 4 so that the rod 4 can be normally rotated forward, and the taper member 7 is moved to the opening side of the mounting hole 2 by the screw action by the forward rotation. To do. That is, the coil spring 17 allows the taper member 7 to move toward the opening side of the mounting hole 2.

一方、ロッド4を逆転(図4では時計回り方向)させようとすると、コイルバネ17のバネ本体17aとロッド4の雄ねじ3のねじ溝3aとの摩擦によって前記バネ本体17aに巻き方向の力が加わって、バネ本体17aが径方向に縮まろうとする(縮径しようとする)。それによってバネ本体17aがロッド4の雄ねじ3のねじ溝3aに強く締め付けられてロッド4の逆転が抑えられる。その結果、ロッド4の逆転によってテーパー部材7が取付孔2の奥側に移動することが抑えられる。   On the other hand, when the rod 4 is rotated in the reverse direction (clockwise in FIG. 4), a force in the winding direction is applied to the spring body 17a by friction between the spring body 17a of the coil spring 17 and the thread groove 3a of the male thread 3 of the rod 4. Thus, the spring body 17a tries to shrink in the radial direction (attempts to reduce the diameter). As a result, the spring body 17a is strongly tightened in the thread groove 3a of the male screw 3 of the rod 4, and the reverse rotation of the rod 4 is suppressed. As a result, the taper member 7 is prevented from moving to the back side of the mounting hole 2 due to the reverse rotation of the rod 4.

なお、コイルバネ17の一端部17bは、図4の平面視でバネ本体17aからその周方向に斜めに延びたのちに下向きに折れ曲がっている。それにより、コイルバネ17やテーパー部材7の製造誤差などによって、コイルバネ17の一端部17bの折れ曲がったのちのその下端がテーパー部材7の係止孔18からずれていても、コイルバネ17の一端部17bなどを容易に弾性変形させて、そのコイルバネ17の一端部17bの下端をテーパー部材7の係止孔18に差し込むことができる。   The one end portion 17b of the coil spring 17 is bent downward after extending obliquely in the circumferential direction from the spring body 17a in a plan view of FIG. As a result, even if the lower end of the coil spring 17 after bending the one end portion 17b of the coil spring 17 is displaced from the locking hole 18 due to a manufacturing error of the coil spring 17 or the taper member 7, the one end portion 17b of the coil spring 17 or the like. Can be easily elastically deformed, and the lower end of the one end 17 b of the coil spring 17 can be inserted into the locking hole 18 of the taper member 7.

各当接部12の外周面15の下部(自由端側)には、図1に示すように、複数本(本実施例では二本)の溝20を当該当接部12の長さ方向に並べて形成しており、その溝20は、各当接部12の外周面15の周方向へ延びている。   As shown in FIG. 1, a plurality of (two in this embodiment) grooves 20 are formed in the length direction of the contact portion 12 at the lower portion (free end side) of the outer peripheral surface 15 of each contact portion 12. The grooves 20 extend side by side in the circumferential direction of the outer peripheral surface 15 of each contact portion 12.

次いで、本発明の逆転防止機構付きアンカーボルトの作用を説明する。まず、アンカーボルトの組み立ての一例を説明すると、図6に示すように、コイルバネ17の一端部17bをテーパー部材7の先端面7aの係止孔18に差し込んで、コイルバネ17をテーパー部材7に係止する。その状態で、テーパー部材7の雌ねじ6の基端(図6では下端)からロッド4を正転させながらねじ込む。   Next, the operation of the anchor bolt with the reverse rotation prevention mechanism of the present invention will be described. First, an example of assembling the anchor bolt will be described. As shown in FIG. 6, one end 17 b of the coil spring 17 is inserted into the locking hole 18 of the tip end surface 7 a of the taper member 7, and the coil spring 17 is engaged with the taper member 7. Stop. In this state, the rod 4 is screwed while rotating forward from the base end (lower end in FIG. 6) of the female screw 6 of the taper member 7.

そして、そのままロッド4の先端部4aの雄ねじ3を前記コイルバネ17のバネ本体17aの内側にねじ込んで、ロッド4の先端部4aの雄ねじ3にコイルバネ17のバネ本体17aを嵌合させる(図3の状態)。つまり、テーパー部材7の先端面7aから突出したロッド4の先端部4aの雄ねじ3のねじ溝3aにコイルバネ17のバネ本体17aが嵌合することになる。そのテーパー部材7に、図1および図7に示すように、拡開部材8(当接部12)を外嵌する。それにより、アンカーボルトの組み立てが完了する。   Then, the male screw 3 of the tip 4a of the rod 4 is screwed into the inside of the spring main body 17a of the coil spring 17, and the spring main body 17a of the coil spring 17 is fitted to the male screw 3 of the tip 4a of the rod 4 (see FIG. 3). Status). That is, the spring main body 17a of the coil spring 17 is fitted into the thread groove 3a of the male screw 3 of the tip 4a of the rod 4 protruding from the tip surface 7a of the taper member 7. As shown in FIGS. 1 and 7, the expanding member 8 (contact portion 12) is fitted on the taper member 7. Thereby, the assembly of the anchor bolt is completed.

そのアンカーボルトを作業者が、拡開機構5を上にした姿勢(図7の姿勢)でロッド4を手で持って前記取付孔2に差し込む。そのアンカーボルトを取付孔2の奥まで差し込んだ際には(図8の状態)、架橋部13の接続部位13bや当接部12が、取付孔2の内周面2aに押し付けられて摩擦などによって架橋部13が取付孔2の内周面2aに仮止めされる。   The operator inserts the anchor bolt into the mounting hole 2 while holding the rod 4 in a posture (the posture shown in FIG. 7) with the spreading mechanism 5 up. When the anchor bolt is inserted all the way into the mounting hole 2 (state shown in FIG. 8), the connecting portion 13b and the contact portion 12 of the bridging portion 13 are pressed against the inner peripheral surface 2a of the mounting hole 2 to cause friction or the like. Thus, the bridging portion 13 is temporarily fixed to the inner peripheral surface 2 a of the mounting hole 2.

その状態で、例えば、工具を使ってロッド4を取付孔2の開口側に引っ張ると、テーパー部材7が取付孔2の開口側へ移動し、テーパー部材7の各傾斜面10が各当接部12の内面11を押す。それにより、各当接部12が取付孔2の内周面2a側へ移動して取付孔2の内周面2aへ押し付けられ、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が取付孔2に固定(仮固定)される。   In this state, for example, when the rod 4 is pulled to the opening side of the mounting hole 2 using a tool, the taper member 7 moves to the opening side of the mounting hole 2, and each inclined surface 10 of the taper member 7 corresponds to each contact portion. The inner surface 11 of 12 is pushed. Thereby, each contact part 12 moves to the inner peripheral surface 2 a side of the mounting hole 2 and is pressed against the inner peripheral surface 2 a of the mounting hole 2, and the outer peripheral surface 15 of each contact part 12 and the inner periphery of the mounting hole 2. The anchor bolt is fixed (temporarily fixed) to the mounting hole 2 by friction between the surfaces 2a.

そのアンカーボルトのロッド4に、例えば設備機器や配管などを固定するためのブラケット22(図8)を装着し、そのブラケット22の下側にナット23(図8)を螺着して、そのナット23をスパナなどの工具で所定のトルク程度に締め込むことで、図8に示すように、当該アンカーボルトがしっかりと取付孔2に固定(本固定)される。   For example, a bracket 22 (FIG. 8) for fixing equipment, piping, or the like is mounted on the rod 4 of the anchor bolt, and a nut 23 (FIG. 8) is screwed to the lower side of the bracket 22 and the nut. As shown in FIG. 8, the anchor bolt is firmly fixed (mainly fixed) to the mounting hole 2 by tightening 23 to a predetermined torque level with a tool such as a spanner.

その後、例えば前記ロッド4に取り付けた設備機器などが振動して、ロッド4が逆転しようとしても、前述のようにコイルバネ17によって前記逆転が抑えられる。従って、ねじ作用でテーパー部材7が取付孔2の奥側に移動して当接部12の内面11に対するテーパー部材7の押す力が低下する(テーパー部材7が緩む)ことが抑制され、ロッド4が振動し易くなることが抑えられる。その結果、前記設備機器などが大きく振動して、騒音や設備機器などのがたつきなどを招くことを抑えることができる。   Thereafter, for example, even if the equipment attached to the rod 4 vibrates and the rod 4 attempts to reverse, the reverse rotation is suppressed by the coil spring 17 as described above. Accordingly, it is possible to suppress the taper member 7 from moving to the back side of the mounting hole 2 due to the screw action, and the pressing force of the taper member 7 against the inner surface 11 of the contact portion 12 is reduced (the taper member 7 is loosened). Is less likely to vibrate. As a result, it can be suppressed that the equipment and the like vibrate greatly and cause noise and rattling of the equipment and the like.

一方、前記振動に伴ってロッド4が正転する場合には、その正転に伴ってねじ作用でテーパー部材7が取付孔2の開口側に移動しようとし、当接部12の内面11に対するテーパー部材7の押す力が強くなる。それによってアンカーボルトが取付孔2の内周面2aによりしっかりと固定され、ロッド4がより振動し難くなる。   On the other hand, when the rod 4 rotates forward with the vibration, the taper member 7 tries to move to the opening side of the mounting hole 2 by the screw action along with the forward rotation, and the taper with respect to the inner surface 11 of the contact portion 12. The pressing force of the member 7 becomes stronger. As a result, the anchor bolt is firmly fixed to the inner peripheral surface 2a of the mounting hole 2, and the rod 4 is less likely to vibrate.

なお、前記説明では、ロッド4を取付孔2の開口側に引っ張ってアンカーボルトを取付孔2に固定したが、ロッド4を引っ張らずに前記ナットのねじ作用のみでアンカーボルトを取付孔2の開口側に移動させて固定してもよい。   In the above description, the anchor bolt is fixed to the mounting hole 2 by pulling the rod 4 toward the opening side of the mounting hole 2, but the anchor bolt is opened to the mounting hole 2 only by the screw action of the nut without pulling the rod 4. It may be moved to the side and fixed.

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
3a ロッドの雄ねじのねじ溝
4 ロッド
4a ロッドの先端部
6 テーパー部材の雌ねじ
7 テーパー部材
7a テーパー部材の先端面
10 テーパー部材の傾斜面
11 当接部の内面
12 当接部
17 コイルバネ(逆転防止機構)
17a コイルバネのバネ本体
17b コイルバネの一端部
17c コイルバネの他端部
18 係止孔
DESCRIPTION OF SYMBOLS 1 Wall surface 2 Wall mounting hole 2a Inner peripheral surface of mounting hole 3 Rod male screw 3a Rod male screw thread groove 4 Rod 4a Rod tip portion 6 Tapered member female screw 7 Taper member 7a Tapered member tip surface 10 Tapered member tip Inclined surface 11 Inner surface of contact portion 12 Contact portion 17 Coil spring (reverse rotation prevention mechanism)
17a Spring body of coil spring 17b One end of coil spring 17c Other end of coil spring 18 Locking hole

Claims (4)

壁面(1)に設けた取付孔(2)の開口に差し込んで当該取付孔(2)に固定する逆転防止機構付きアンカーボルトであって、
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)が螺着する雌ねじ(6)を形成しているテーパー部材(7)と、そのテーパー部材(7)に外嵌する当接部(12)と、前記当接部(12)をつないでいる弾性変形可能な架橋部(13)と、前記ロッド(4)の逆転を抑える逆転防止機構とを有しており、
前記テーパー部材(7)の外周面には、当該テーパー部材(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)を形成しており、前記当接部(12)は、前記傾斜面(10)に面接触する内面(11)を有し、
前記取付孔(2)の開口に差し込んだ前記テーパー部材(7)を前記取付孔(2)の開口側に移動させることで、前記当接部(12)が、前記テーパー部材(7)の傾斜面(10)によって前記取付孔(2)の内周面(2a)側に押されて当該取付孔(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)に固定されるようになっており、
前記逆転防止機構は、コイルバネ(17)からなり、
そのコイルバネ(17)のバネ本体(17a)は、前記ロッド(4)の雄ねじ(3)のねじ溝(3a)に嵌合しており、
前記コイルバネ(17)の一端部(17b)は、前記テーパー部材(7)に係止されており、
前記コイルバネ(17)の他端部(17c)は、前記バネ本体(17a)から前記ロッド(4)の径方向へ延びており、
前記コイルバネ(17)は、前記ロッド(4)が正転するときには前記バネ本体(17a)が径方向に広がって、前記テーパー部材(7)が前記取付孔(2)の開口側に移動することを許容する一方で、前記ロッド(4)が逆転するときには前記バネ本体(17a)が径方向に縮まって、前記ロッド(4)の逆転を抑え
前記架橋部(13)は、前記ロッド(4)の先端側に配置している本体部位(13a)と、前記本体部位(13a)の縁から延びて前記当接部(12)の先端部につないでいる接続部位(13b)と、を有しており、
前記接続部位(13b)は、前記本体部位(13a)の縁から前記架橋部(13)の外方へ斜め方向に延びたのち、長さ方向の中間で前記架橋部(13)の内方へ屈曲して、前記接続部位(13b)の自由端部に前記当接部(12)の先端部をつないでおり、前記アンカーボルトを前記取付孔(2)に差し込んだ際には、前記接続部位(13b)の中間部や前記当接部(12)が前記取付孔(2)の内周面(2a)に押し付けられることを特徴とする逆転防止機構付きアンカーボルト。
An anchor bolt with a reverse rotation prevention mechanism that is inserted into the opening of the mounting hole (2) provided in the wall surface (1) and fixed to the mounting hole (2),
A rod (4) forming a male screw (3) on the outer peripheral surface, a taper member (7) forming a female screw (6) to which the male screw (3) of the rod (4) is screwed, and the taper An abutting portion (12) fitted on the member (7) , an elastically deformable bridging portion (13) connecting the abutting portion (12), and a reverse rotation preventing mechanism for suppressing the reverse rotation of the rod (4). And
On the outer peripheral surface of the taper member (7), a flat inclined surface (10) is formed so as to approach the central axis of the taper member (7), and the contact portion (12) Has an inner surface (11) in surface contact with the inclined surface (10),
By moving the taper member (7) inserted into the opening of the mounting hole (2) toward the opening side of the mounting hole (2), the contact portion (12) is inclined by the taper member (7). The surface (10) is pushed toward the inner peripheral surface (2a) of the mounting hole (2) and is pressed against the inner peripheral surface (2a) of the mounting hole (2), and the anchor bolt is attached to the mounting hole (2 )
The reverse rotation prevention mechanism comprises a coil spring (17),
The spring body (17a) of the coil spring (17) is fitted in the thread groove (3a) of the male thread (3) of the rod (4),
One end (17b) of the coil spring (17) is locked to the taper member (7),
The other end (17c) of the coil spring (17) extends from the spring body (17a) in the radial direction of the rod (4),
In the coil spring (17), when the rod (4) rotates forward, the spring body (17a) expands in the radial direction, and the taper member (7) moves to the opening side of the mounting hole (2). On the other hand, when the rod (4) reverses, the spring body (17a) shrinks in the radial direction to suppress the reverse rotation of the rod (4) ,
The bridging part (13) extends from the main body part (13a) disposed on the front end side of the rod (4) and the edge of the main body part (13a) to the front end part of the contact part (12). A connecting part (13b) connected,
The connection part (13b) extends obliquely from the edge of the main body part (13a) to the outside of the bridge part (13) and then inward of the bridge part (13) in the middle of the length direction. Bending and connecting the tip of the contact portion (12) to the free end of the connection portion (13b), and when the anchor bolt is inserted into the mounting hole (2), the connection portion (13b) of the intermediate portion and the contact portion (12) of the mounting hole (2) the inner circumferential surface (2a) to pressed against reverse rotation preventing mechanism with anchor bolt, characterized in Rukoto of.
前記ロッド(4)の先端部(4a)が、前記テーパー部材(7)の先端面(7a)から突出していて、そのロッド(4)の先端部(4a)の雄ねじ(3)のねじ溝(3a)に前記コイルバネ(17)のバネ本体(17a)が嵌合しており、
前記コイルバネ(17)の一端部(17b)は、折れ曲がって前記テーパー部材(7)の先端面(7a)に形成している係止孔(18)に差し込まれて係止されており、
前記コイルバネ(17)の他端部(17c)は、前記バネ本体(17a)から前記テーパー部材(7)の先端面(7a)に沿って前記ロッド(4)の径方向へ延びていることを特徴とする請求項記載の逆転防止機構付きアンカーボルト。
The tip (4a) of the rod (4) protrudes from the tip surface (7a) of the taper member (7), and the thread groove of the male screw (3) of the tip (4a) of the rod (4) ( 3a) is fitted with the spring body (17a) of the coil spring (17),
One end (17b) of the coil spring (17) is bent and inserted into a locking hole (18) formed in the tip surface (7a) of the tapered member (7), and locked.
The other end (17c) of the coil spring (17) extends in the radial direction of the rod (4) from the spring body (17a) along the tip surface (7a) of the taper member (7). The anchor bolt with a reverse rotation prevention mechanism according to claim 1, wherein the anchor bolt has a reverse rotation prevention mechanism.
前記コイルバネ(17)の他端部(17c)は、平面視で前記テーパー部材(7)の先端面(7a)よりも外方へは突出していないことを特徴とする請求項1又は2記載の逆転防止機構付きアンカーボルト。 The other end of the coil spring (17) (17c) are as claimed in claim 1 or 2, wherein the not protrude outward from the front end face of the tapered member in a plan view (7) (7a) Anchor bolt with reverse rotation prevention mechanism. 前記本体部位(13a)は、薄平板状であることを特徴とする請求項1〜3のいずれか1項記載の逆転防止機構付きアンカーボルト。The anchor bolt with a reverse rotation prevention mechanism according to any one of claims 1 to 3, wherein the main body portion (13a) has a thin flat plate shape.
JP2015183893A 2015-09-17 2015-09-17 Anchor bolt with reverse rotation prevention mechanism Active JP6584890B2 (en)

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JP2015183893A JP6584890B2 (en) 2015-09-17 2015-09-17 Anchor bolt with reverse rotation prevention mechanism
TW104143600A TW201712193A (en) 2015-09-17 2015-12-24 Anchor bolt having reverse-rotation preventing mechanism wherein the coil spring (17) allows the screw rod (4) to normally rotate for enabling the conical component (7) to be moved towards the installation hole (2) and the screw rod (4) is prevented from reversely rotating

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