JP2009185552A

JP2009185552A - Pressure receiving device

Info

Publication number: JP2009185552A
Application number: JP2008028209A
Authority: JP
Inventors: Kazunori Maeda; 和徳前田; Takeo Ikeda; 武穂池田
Original assignee: Okabe Co Ltd; Nippon Steel and Sumikin Metal Products Co Ltd
Current assignee: Nippon Steel Metal Products Co Ltd; Okabe Co Ltd
Priority date: 2008-02-07
Filing date: 2008-02-07
Publication date: 2009-08-20
Anticipated expiration: 2028-02-07
Also published as: JP5049157B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a user-friendly pressure receiving device, which can simply and accurately absorb a gap made between a ground side and an anchor member side by ground subsidence etc., without reference to the size of the gap, which can easily maintain an accurate operation, and which almost dispenses with troublesome maintenance operations. <P>SOLUTION: This pressure receiving device is equipped with a first engaging member 4 which is installed on the side of the anchor member 1, and a second engaging member 5 which is installed on the side of a bearing plate 3. The first and second engaging members 4 and 5 are engaged with each other in a state in which the second engaging member 5 can move in a phased manner only in a downward direction. The gap made between the side of the ground 2 and that of the anchor member is absorbed by the phased descent of the second engaging member 5. The second engaging member 5 is split into a plurality of parts in an axial-center direction and restrained in an diameter-expandable/contractible manner from the outside by a restraining means; and an elastic urging member is interposed between the second engaging member 5 and a stopper portion installed on the side of the anchor member, so as to urge the second engaging member 5 so that it can move downward in a phased manner while expanding its diameter along an engaging surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、地山等の斜面の安定化などに使用されるアンカー用の受圧装置に関する。すなわち、ロックボルトや、ＰＣ鋼線、ＰＣ鋼より線、異形ＰＣ鋼棒等を用いたアンカーテンドンなどから構成されるアンカー部材に作用する引張力を地盤側へ伝達するアンカー用の受圧装置に関する。とりわけ、地盤の沈下などによって地盤上の支圧板とアンカー部材に螺合した締付ナットとの間などの、地盤側と受圧装置を構成するアンカー部材側との間に生じる間隙を吸収し得るように改良した受圧装置に関する。 The present invention relates to a pressure receiving device for an anchor used for stabilizing a slope such as a natural ground. That is, the present invention relates to a pressure receiving device for an anchor that transmits a tensile force acting on an anchor member composed of an anchor member using a lock bolt, a PC steel wire, a PC steel wire, a deformed PC steel rod, or the like to the ground side. In particular, it is possible to absorb a gap generated between the ground side and the anchor member constituting the pressure receiving device, such as between a bearing plate on the ground and a tightening nut screwed to the anchor member due to ground subsidence. The present invention relates to an improved pressure receiving device.

この種の受圧装置において、アンカー部材の頭部外周面に形成された雄ねじに螺合したナットと支圧板との間にコイルばね等の弾性手段を介在させて支圧板を地盤側へ押圧するように構成したものが知られている（特許文献１）。しかしながら、この従来技術の場合には、雪解けなど、何らかの原因によって地盤側が沈下すると、それに追随して支圧板が前記弾性手段の付勢力によって降下し、地盤側とアンカー部材側との間の間隙の発生を抑制し得る点では有効なものの、支圧板の下降に伴って前記弾性手段の付勢力が低下し、その分地盤側の上方への移動に対する抗力が弱まってしまい、斜面の崩落を的確に阻止できないというおそれもあった。
特許第３５１６０９１号公報 In this type of pressure receiving device, an elastic means such as a coil spring is interposed between a nut and a bearing plate screwed to a male screw formed on the outer peripheral surface of the head of the anchor member so as to press the bearing plate to the ground side. What was comprised in this is known (patent document 1). However, in the case of this prior art, when the ground side sinks due to some reason such as snow melting, the supporting plate descends by the urging force of the elastic means, and the gap between the ground side and the anchor member side follows. Although effective in suppressing the occurrence, the urging force of the elastic means decreases as the bearing plate descends, and the drag against upward movement on the ground side is weakened, and the collapse of the slope is accurately performed. There was also a fear that it could not be stopped.
Japanese Patent No. 3516091

そこで、アンカー部材の頭部外周面に形成された雄ねじに螺合したナットと支圧板との間に皿ばね等の弾性手段を介在させて支圧板を地盤側へ押圧するように構成するとともに、それとは別に支圧板の上部に他のナットを設け、そのナットをゼンマイばねなどによって下方へ進む方向に回転するように付勢することにより、地盤側とアンカー部材側との間に生じる間隙を常に吸収し得るように構成するとともに、地盤側の上方への移動を前記ナットを介してアンカー部材で直に受けることによって、地盤の上方への移動に対抗する強力な抗力を確保し得るように構成したものも開発されている（引用文献２）。しかしながら、この従来技術の場合には、締付用のナットや間隙吸収用の弾性機構とは別に支圧板の上方への移動を阻止するためのナットを設置し、そのナットに対してゼンマイばねを巻上げた状態で設置しなければならないことから、構造が複雑になり設置スペースや設置作業にも大きな難点があった。しかも、ゼンマイばねの構造上、薄肉のばね材の使用に起因する腐食などによる機能低下の問題や、支圧板に作用するばねの回転付勢力の反力をどのようにとるかといった技術的問題もあった。さらに、想定される間隙の大きさに対応するためにはナットの回転角も大きくなり、大型のゼンマイばねが必要とされ、しかもナットの螺合部の錆付きなどを常に防いだ状態に維持しなければ的確な動作が得られないという動作維持上の厄介な問題もあった。
特開２００２−３３９３５６号公報 Then, while configuring to press the bearing plate to the ground side by interposing an elastic means such as a disc spring between the nut and the bearing plate screwed to the male screw formed on the outer peripheral surface of the anchor member, Separately, another nut is provided on the upper part of the bearing plate, and the nut is always urged to rotate downward by a spring, etc., so that a gap generated between the ground side and the anchor member side is always maintained. It is constructed so that it can absorb, and it is constructed so that a strong drag against the upward movement of the ground can be secured by receiving the upward movement of the ground side directly by the anchor member via the nut. That has been developed (Cited document 2). However, in the case of this prior art, a nut for preventing the upward movement of the bearing plate is installed separately from the tightening nut and the gap absorbing elastic mechanism, and the mainspring spring is attached to the nut. Since it must be installed in a wound state, the structure is complicated, and there is a great difficulty in installation space and installation work. In addition, due to the structure of the mainspring spring, there are problems of functional deterioration due to corrosion caused by the use of thin spring materials, and technical problems such as how to counteract the reaction force of the spring's rotational biasing force acting on the bearing plate. there were. Furthermore, the rotation angle of the nut also increases to accommodate the assumed gap size, a large spring spring is required, and rusting of the screwed part of the nut is always prevented. There is also a troublesome problem in maintaining the operation that an accurate operation cannot be obtained without it.
JP 2002-339356 A

本発明は、以上のような従来の技術的状況に鑑み、間隙の大きさに関わらず地盤側とアンカー部材側との間に生じる間隙を簡便かつ的確に吸収することができ、しかも的確な動作の維持が容易で、厄介なメンテナンス作業が殆ど不要な、使い勝手のきわめて良好な受圧装置を提供することを目的とする。 In view of the above-described conventional technical situation, the present invention can easily and accurately absorb the gap generated between the ground side and the anchor member side regardless of the size of the gap, and can operate accurately. It is an object of the present invention to provide a pressure receiving device that is easy to maintain and that is extremely easy to use and that requires almost no troublesome maintenance work.

前記課題を解決するため、請求項１の発明では、アンカー部材側に設置される第１係合部材と支圧板側に設置される第２係合部材とを備え、前記第１係合部材は、内面にアンカー部材の外周面に形成された雄ねじに螺合可能な雌ねじを有し、外面に係合部を設けた筒状体から構成するとともに、前記第２係合部材は、内面に前記第１係合部材の外面に設けた係合部に対して係合可能な係合部を有し、かつ軸心方向に複数に分割され、拘束手段により外部から拡縮径可能に拘束された筒状体から構成し、さらに前記第２係合部材とアンカー部材側に設置された受止部との間に弾性付勢手段を介在させるとともに、前記第１係合部材と第２係合部材との係合部を傾斜面と該傾斜面に連なる係止面から構成して下方へのみ移動可能に構成し、前記弾性付勢手段の付勢力により第２係合部材が前記傾斜面に沿って拡径しながら下方へ段階的に移動することにより地盤側とアンカー部材側との間に生じる間隙を吸収するという技術手段を採用した。前記第１係合部材と第２係合部材との係合部は、傾斜面と該傾斜面に連なる前記筒状体の軸線に直交する方向の係止面とからなる鋸歯状の係合溝を複数条設けることにより形成することができる（請求項２）。前記第２係合部材の内面に設ける係合部の曲率は、第１係合部材の外面に設けた係合部の曲率と同じ曲率でもよいし、それより小さい曲率に設定してもよい（請求項３）。前記拘束手段は、弾性リングから構成してもよいし（請求項４）、ゴムチューブなどを用いてもよい。前記弾性付勢手段は、コイルスプリングなどから構成することができる（請求項５）。 In order to solve the above-mentioned problem, in the invention of claim 1, a first engagement member installed on the anchor member side and a second engagement member installed on the bearing plate side are provided, and the first engagement member is The inner surface has a female thread that can be screwed into the male thread formed on the outer peripheral surface of the anchor member, and the second engagement member is formed on the inner surface. A cylinder having an engaging portion engageable with an engaging portion provided on the outer surface of the first engaging member, divided into a plurality of portions in the axial direction, and constrained so as to be able to expand and contract from the outside by a restraining means. An elastic biasing means interposed between the second engaging member and the receiving portion installed on the anchor member side, and the first engaging member and the second engaging member. The engaging portion is composed of an inclined surface and a locking surface that is continuous with the inclined surface, and is configured to be movable only downward. Technical means for absorbing the gap generated between the ground side and the anchor member side by the stepwise downward movement of the second engaging member while expanding the diameter along the inclined surface by the urging force of the urging means. It was adopted. The engaging portion between the first engaging member and the second engaging member is a sawtooth engaging groove having an inclined surface and an engaging surface in a direction perpendicular to the axis of the cylindrical body connected to the inclined surface. Can be formed by providing a plurality of lines (claim 2). The curvature of the engagement portion provided on the inner surface of the second engagement member may be the same as the curvature of the engagement portion provided on the outer surface of the first engagement member, or may be set to a smaller curvature ( Claim 3). The restraining means may be constituted by an elastic ring (Claim 4), or a rubber tube may be used. The elastic urging means can be constituted by a coil spring or the like.

本発明によれば、次の効果を得ることができる。
（１）前記第２係合部材の下方への移動量の設定に関しては特段の制約がなく、自由な設定が可能なことから、間隙の大きさに関わらず地盤側とアンカー部材側との間に生じる間隙を簡便かつ的確に吸収することができる。
（２）内面にアンカー部材の外周面に形成された雄ねじに螺合可能な雌ねじを有し、外面に係合部を設けた筒状体からなる第１係合部材と、内面に前記第１係合部材の外面に設けた係合部に対して係合可能な係合部を有し、かつ軸心方向に複数に分割され、拘束手段により外部から拡縮径可能に拘束された筒状体からなる第２係合部材との組合わせを採用したので、簡潔な構成により地盤側とアンカー部材側との間に生じる間隙に対する的確な吸収動作を得ることができる。
（３）従来のように回転動作を伴うことなく、前記第２係合部材の下方への段階的な移動のみによって地盤側とアンカー部材側との間に生じる間隙を吸収する構成を採用したことから、的確な動作の確保が容易で、その動作維持のための厄介なメンテナンス作業は殆ど不要である。
（４）アンカー部材側に設置される第１係合部材に対して支圧板側に設置した第２係合部材を下方へ段階的に移動し得るように係合させるという構成を採用したことから、アンカー部材に沿って比較的コンパクトに設置することができる。
（５）前記第１係合部材と第２係合部材との係合部を、傾斜面と該傾斜面に連なる筒状体の軸線に直交する方向の係止面とからなる鋸歯状の係合形態を採用すれば、地盤側の上方への相対的移動に対して前記係止面において楔のように食込んだ状態で強力に対抗し得るとともに、その係合機構の半径方向の拘束力の縮小にも有効である。
（６）前記第２係合部材の内面に設ける係合部の曲率を、第１係合部材の外面に設ける係合部の曲率より小さい曲率に設定すれば、第２係合部材の外方からの拘束に対する適応性が増すので、的確な係合状態がより安定的に得られる。 According to the present invention, the following effects can be obtained.
(1) Since there is no particular restriction on the setting of the downward movement amount of the second engagement member, and it can be set freely, the gap between the ground side and the anchor member side is possible regardless of the size of the gap. Can be easily and accurately absorbed.
(2) A first engagement member made of a cylindrical body having a female screw that can be screwed to a male screw formed on the outer peripheral surface of the anchor member on the inner surface, and having an engagement portion on the outer surface; A cylindrical body that has an engaging portion that can be engaged with an engaging portion provided on the outer surface of the engaging member, is divided into a plurality of portions in the axial direction, and is restricted by the restricting means so that the diameter can be expanded and contracted from the outside. Since the combination with the 2nd engaging member which consists of is employ | adopted, the exact absorption operation | movement with respect to the gap | interval produced between the ground side and the anchor member side can be obtained by simple structure.
(3) Adopting a configuration that absorbs a gap generated between the ground side and the anchor member side only by a stepwise movement of the second engagement member without a rotational movement as in the prior art. Therefore, it is easy to ensure an accurate operation, and troublesome maintenance work for maintaining the operation is almost unnecessary.
(4) Since the second engagement member installed on the bearing plate side is engaged with the first engagement member installed on the anchor member side so that the second engagement member can be moved downward stepwise. It can be installed relatively compactly along the anchor member.
(5) An engagement portion between the first engagement member and the second engagement member is a saw-tooth engagement comprising an inclined surface and an engaging surface in a direction perpendicular to the axis of the cylindrical body connected to the inclined surface. By adopting the combined form, it is possible to strongly counter the upward relative movement on the ground side in a state of being bitten like a wedge on the locking surface, and the radial restraint force of the engagement mechanism. It is also effective for reducing the size.
(6) If the curvature of the engagement portion provided on the inner surface of the second engagement member is set to be smaller than the curvature of the engagement portion provided on the outer surface of the first engagement member, the outer side of the second engagement member Therefore, an appropriate engagement state can be obtained more stably.

本発明は、地山等の斜面の安定化などに使用され、ロックボルトや、ＰＣ鋼線、ＰＣ鋼より線、異形ＰＣ鋼棒等を用いたアンカーテンドンなどから構成されるアンカー部材に作用する引張力を地盤側へ伝達するアンカー用の受圧装置として広く適用することが可能である。なお、アンカー部材側に設置される第１係合部材に対して支圧板側に設置した第２係合部材を下方へ段階的に移動させるための原動力は、コイルスプリングなどの適宜の弾性付勢手段による。因みに、以下の実施例のように、前記第１係合部材と第２係合部材との係合面の断面を傾斜面と該傾斜面に連なる筒状体の軸線に直交する方向の係止面とからなる鋸歯状に形成した係合形態を採用すれば、第１係合部材と第２係合部材とが前記係止面において楔のように食込んだ状態で地盤側の上方への相対的移動に対して強力に対抗し得るとともに、その係合機構の半径方向の拘束力は小さくてもよい。なお、この第１係合部材と第２係合部材との係合面の具体的な断面形状に関しては、地盤側の上方への相対的移動に対する十分な抗力を得られるものであれば、他の断面形状を選択することも可能である。さらに、第２係合部材の内面に設ける係合部の曲率を、第１係合部材の外面に設ける係合部の曲率より小さい曲率に設定すれば、第２係合部材の外方からの拘束の方向に多少のばらつきがあっても、その拘束方向に応じて係合状態の中心位置が移動しながら適応するので、的確な係合状態をより安定的に得ることができる。ところで、第２係合部材は下方へ段階的に移動することから、地盤側とアンカー部材側との間に生じる間隙が完全には解消されない中間の状態もあり得るが、その場合でも地盤側とアンカー部材側との間に生じる間隙は殆ど吸収されるとともに、下方への移動ピッチの大小を選定することにより実用的に問題のない程度の間隙に縮小することも可能である。なお、前記第１係合部材は、アンカー部材の頭部外周面に形成された雄ねじとの螺合などによって該第１係合部材に作用する力をアンカー部材側へ伝達し得る状態で設置されるものであればよい。 INDUSTRIAL APPLICABILITY The present invention is used for stabilization of slopes of natural grounds and the like, and acts on an anchor member composed of a rock bolt, a PC steel wire, a PC steel strand, an uncurtain dong using a deformed PC steel rod, or the like It can be widely applied as a pressure receiving device for an anchor that transmits a tensile force to the ground side. The driving force for moving the second engagement member installed on the bearing plate side downward in a stepwise manner relative to the first engagement member installed on the anchor member side is an appropriate elastic bias such as a coil spring. By means. Incidentally, as in the following embodiment, the cross section of the engagement surface between the first engagement member and the second engagement member is locked in the direction perpendicular to the inclined surface and the axis of the cylindrical body connected to the inclined surface. If the engagement form formed in a sawtooth shape composed of the surface is adopted, the first engagement member and the second engagement member are lifted upward on the ground side in a state of being bitten like a wedge on the engagement surface. While being able to strongly counter relative movement, the radial restraining force of the engagement mechanism may be small. In addition, regarding the specific cross-sectional shape of the engagement surface between the first engagement member and the second engagement member, as long as sufficient resistance against relative upward movement on the ground side can be obtained, other It is also possible to select the cross-sectional shape. Furthermore, if the curvature of the engaging portion provided on the inner surface of the second engaging member is set to a curvature smaller than the curvature of the engaging portion provided on the outer surface of the first engaging member, the second engaging member is exposed from the outside. Even if there is some variation in the direction of restraint, the center position of the engaged state is adapted to move according to the restrained direction, so that an accurate engaged state can be obtained more stably. By the way, since the second engaging member moves downward stepwise, there may be an intermediate state in which the gap generated between the ground side and the anchor member side is not completely eliminated. The gap generated between the anchor member and the anchor member is almost absorbed, and can be reduced to a gap that does not cause any practical problems by selecting the size of the downward movement pitch. The first engagement member is installed in a state in which a force acting on the first engagement member can be transmitted to the anchor member side by screwing with a male screw formed on the outer peripheral surface of the head of the anchor member. Anything is acceptable.

図１は本発明の一実施例を示した分解組立図である。また、図２〜図６はそれぞれ部品を拡大して示した部品説明図である。図中１はアンカー部材で、地盤２に対して定着した状態に埋設され、図１に示したように頭部が支圧板３に形成された挿通部を介して上方へ突出した状態に設置される。その支圧板３より上方に突出したアンカー部材１の頭部に対して、アンカー部材１側に設置される第１係合部材４と支圧板３側に設置される第２係合部材５とから構成される係合機構組立体６が装着される。第１係合部材４は、図２の片側断面で示した部品説明図のように、内周面にアンカー部材１の頭部外周面に形成された雄ねじ７に螺合可能な雌ねじ８を設けた筒状体からなり、外周面には傾斜面と該傾斜面に連なる前記筒状体の軸線に直交する方向の係止面とからなる鋸歯状の係合面９を形成している。さらに、本実施例では、第１係合部材４の上端部に図３に示したように六角形からなるスパナ掛け部１０を形成している。なお、アンカー部材１に形成する前記雄ねじ７に関しては、少なくともアンカー部材１の頭部外周面に形成されていれば足り、アンカー部材１の全長に対して形成したものでも、部分的に形成したものでもよい。 FIG. 1 is an exploded view showing an embodiment of the present invention. 2 to 6 are parts explanatory views showing the parts in an enlarged manner. In the figure, reference numeral 1 denotes an anchor member which is embedded in a state of being fixed to the ground 2 and is installed in a state where the head protrudes upward through an insertion portion formed in the bearing plate 3 as shown in FIG. The From the first engaging member 4 installed on the anchor member 1 side and the second engaging member 5 installed on the bearing plate 3 side with respect to the head of the anchor member 1 protruding upward from the bearing plate 3. The constructed engaging mechanism assembly 6 is mounted. The first engagement member 4 is provided with a female screw 8 that can be screwed to a male screw 7 formed on the outer peripheral surface of the head of the anchor member 1 on the inner peripheral surface as shown in the component explanatory view shown in the one-side cross section of FIG. A serrated engagement surface 9 comprising an inclined surface and a locking surface in a direction perpendicular to the axis of the cylindrical body connected to the inclined surface is formed on the outer peripheral surface. Furthermore, in this embodiment, a spanner hooking portion 10 made of a hexagon is formed at the upper end portion of the first engaging member 4 as shown in FIG. As for the male screw 7 formed on the anchor member 1, it is sufficient that it is formed at least on the outer peripheral surface of the head of the anchor member 1. Even if it is formed with respect to the entire length of the anchor member 1, it is partially formed. But you can.

図４〜図６は前記第２係合部材５を拡大して示した部品説明図であり、それぞれ図４は第２係合部材５の内周面、図５は外周面、図６は平面を示したものである。図示のように、前記第２係合部材５は、内周面に前記第１係合部材４の係合面９と同様の傾斜面と係止面とからなる鋸歯状の係合面１１が形成され、その第１係合部材４の係合面９に係合して下方へのみ段階的に移動し得るように構成されている。図６の平面図に示したように、本実施例の第２係合部材５は、縦に円弧状に３分割した場合を示したものである。第２係合部材５の外周面には適宜数の溝部１２が形成され、図９に示した拘束用の弾性変形可能なリング１３を嵌入することにより半径方向に拡縮し得るように構成している。なお、この分割されたそれぞれの第２係合部材５の係合面１１の半径を大きくし、その曲率を第１係合部材の係合面９の曲率より小さい曲率に設定すれば、第２係合部材５の外方からの拘束の方向に多少のばらつきがあっても、その拘束方向に応じて第１係合部材の係合面９との係合の中心位置が移動しながら適応するので、的確な係合状態をより安定的に得ることができる。さらに、第２係合部材５の下部には水平部１４が形成され、その下面が支圧板３上に当接し得るように構成するとともに、その水平部１４の上面側にリング状の凹部１５を形成し、本実施例ではコイルスプリングからなる弾性付勢手段１６の下端部を嵌合支持し得るように構成している。 FIG. 4 to FIG. 6 are parts explanatory views showing the second engaging member 5 in an enlarged manner. FIG. 4 shows the inner peripheral surface of the second engaging member 5, FIG. 5 shows the outer peripheral surface, and FIG. Is shown. As shown in the figure, the second engagement member 5 has a serrated engagement surface 11 having an inclined surface and a locking surface similar to the engagement surface 9 of the first engagement member 4 on the inner peripheral surface. It is formed and is configured to engage with the engaging surface 9 of the first engaging member 4 and move only stepwise downward. As shown in the plan view of FIG. 6, the second engagement member 5 of the present embodiment shows a case where the second engagement member 5 is vertically divided into three arcs. An appropriate number of grooves 12 are formed on the outer peripheral surface of the second engaging member 5 and are configured so as to expand and contract in the radial direction by fitting the elastically deformable ring 13 shown in FIG. Yes. If the radius of the engagement surface 11 of each of the divided second engagement members 5 is increased and the curvature thereof is set to be smaller than the curvature of the engagement surface 9 of the first engagement member, the second Even if there is some variation in the direction of restraint from the outside of the engagement member 5, the center position of the engagement with the engagement surface 9 of the first engagement member is adapted to move according to the restraint direction. Therefore, an accurate engagement state can be obtained more stably. Further, a horizontal portion 14 is formed in the lower portion of the second engaging member 5, and the lower surface thereof is configured to be able to abut on the bearing plate 3, and a ring-shaped recess 15 is formed on the upper surface side of the horizontal portion 14. In this embodiment, the lower end portion of the elastic biasing means 16 made of a coil spring can be fitted and supported.

しかして、支圧板３より上方に突出したアンカー部材１の頭部に前記係合機構組立体６を装着する場合には、先ず図７に示したように、３分割された各第２係合部材５を、第１係合部材４の外周面に対して、それぞれの係合面９，１１を係合させながら組付け、その組付け状態を各溝部１２にリング１３を嵌入して拘束維持することにより、図８に示した係合機構組立体６を形成する。しかる後、アンカー部材１の頭部外周面に形成した雄ねじ７に対して前記第１係合部材４の内周面に形成した雌ねじ８を螺合し、前記係合機構組立体６を所期の位置に装着する。なお、以上の説明では、予め係合機構組立体６を組立ててからアンカー部材１の頭部に装着する場合を説明したが、第１係合部材４の外周面に対して３分割されたそれぞれの第２係合部材５を直接装着してリング１３で拘束する形態も可能である。 Therefore, when the engagement mechanism assembly 6 is mounted on the head of the anchor member 1 protruding upward from the bearing plate 3, first, as shown in FIG. The member 5 is assembled to the outer peripheral surface of the first engagement member 4 while engaging the respective engagement surfaces 9 and 11, and the assembly state is restrained by inserting a ring 13 in each groove portion 12. Thus, the engaging mechanism assembly 6 shown in FIG. 8 is formed. Thereafter, a female screw 8 formed on the inner peripheral surface of the first engaging member 4 is screwed into a male screw 7 formed on the outer peripheral surface of the head of the anchor member 1, and the engaging mechanism assembly 6 is thus fixed. Attach to the position. In the above description, the case where the engaging mechanism assembly 6 is assembled in advance and then mounted on the head of the anchor member 1 has been described. However, each of the outer peripheral surfaces of the first engaging member 4 is divided into three parts. A configuration in which the second engagement member 5 is directly mounted and restrained by the ring 13 is also possible.

前記係合機構組立体６がアンカー部材１の頭部に対して装着された場合には、図１に示したように、第２係合部材５の外周面に沿ってコイルスプリングからなる弾性付勢手段１６を外嵌し、その弾性付勢手段１６の下端部を第２係合部材５の水平部１４の上面側に形成したリング状の凹部１５に嵌合支持する。さらに、その弾性付勢手段１６の上端部を締付ナット１７の下面側に形成した凹部１８に嵌合支持するとともに、その締付ナット１７をアンカー部材１の頭部外周面に形成された雄ねじ７に螺合して締付ける。これにより、その締付ナット１７による締付力が弾性付勢手段１６を介して支圧板３に伝達されることになる。なお、前記第１係合部材４の下端部を支圧板３に当接した状態において、第１係合部材４をアンカー部材１に形成した雄ねじ７に対して締付けることにより、その締付力を支圧板３に伝達してアンカー部材１に引張力を作用させることも可能である。因みに、前記凹部１５，１８に関しては形成せずに平坦部のままでも構わない。 When the engagement mechanism assembly 6 is attached to the head of the anchor member 1, as shown in FIG. 1, a resilient spring made of a coil spring is formed along the outer peripheral surface of the second engagement member 5. The biasing means 16 is externally fitted, and the lower end portion of the elastic biasing means 16 is fitted and supported in a ring-shaped recess 15 formed on the upper surface side of the horizontal portion 14 of the second engagement member 5. Further, the upper end portion of the elastic biasing means 16 is fitted and supported in a recess 18 formed on the lower surface side of the tightening nut 17, and the tightening nut 17 is formed on the outer peripheral surface of the head of the anchor member 1. Screw onto 7 and tighten. As a result, the tightening force by the tightening nut 17 is transmitted to the bearing plate 3 via the elastic biasing means 16. In the state where the lower end portion of the first engagement member 4 is in contact with the bearing plate 3, the first engagement member 4 is tightened against the male screw 7 formed on the anchor member 1, so that the tightening force is increased. It is also possible to transmit a tensile force to the anchor member 1 by transmitting it to the bearing plate 3. Incidentally, the concave portions 15 and 18 may be left flat without being formed.

図１０は当初の設置状態を片側断面で示した設置状態説明図である。図示のように、当初の設置状態においては、締付ナット１７による締付け作用によって弾性付勢手段１６は最も圧縮された状態にある。図１１はその当初の設置状態と地盤２が沈下した場合の設置状態を比較して示した設置状態説明図である。また、図１２は前記第１係合部材４の係合面９と第２係合部材５の係合面１１との係合状態の変化の過程を示した係合状態説明図である。しかして、図１１に示した当初の設置状態から地盤２側が沈下した場合には、第１係合部材４の係合面９と第２係合部材５の係合面１１との係合状態は、図１２の（イ）〜（ハ）に示した過程で変化する。すなわち、図１２の（イ）に示した設置当初の係合状態から、何らかの原因で地盤２側が沈下すると、前記弾性付勢手段１６の付勢力によって、第２係合部材５が（ロ）のように係合面９，１１に沿って斜め下方に拡径しながら摺動し、さらに第２係合部材５の係合面１１が第１係合部材４の係合面９の外周部を乗越えると、（ハ）に示したように１段下の係合状態へ移行することになる。そして、地盤２側の沈下が大きい場合には、その沈下の大きさに応じて第２係合部材５の下方への段階的な移動を繰返し、図１１の右半分に示したように地盤２側との間に生じる間隙を吸収することになる。以上のように、係合状態の変化の過程では、分割された各第２係合部材５が外方への拡径を繰返しながら段階的に下降することになる。なお、本実施例では第１係合部材４の係合面９と第２係合部材５の係合面１１は、前述のように傾斜面と該傾斜面に連なる筒状体の軸線に直交する方向の係止面からなる鋸歯状に形成され、地盤側の相対的移動などにより第２係合部材５が上昇する方向の外力を受けた場合には、それらの係合面９，１１が互いに前記係止面において楔のように食込んだ状態で強力に対抗することから、大きな抗力が的確に得られるとともに、その係合機構に必要とされる半径方向の拘束力を小さくすることができる。 FIG. 10 is an explanatory view of the installation state showing the initial installation state in a cross section on one side. As shown in the drawing, in the initial installation state, the elastic biasing means 16 is in the most compressed state by the tightening action of the tightening nut 17. FIG. 11 is an explanatory view of the installation state showing a comparison between the initial installation state and the installation state when the ground 2 sinks. FIG. 12 is an engagement state explanatory view showing the process of changing the engagement state between the engagement surface 9 of the first engagement member 4 and the engagement surface 11 of the second engagement member 5. Thus, when the ground 2 side sinks from the initial installation state shown in FIG. 11, the engagement state between the engagement surface 9 of the first engagement member 4 and the engagement surface 11 of the second engagement member 5. Changes in the processes shown in (a) to (c) of FIG. That is, when the ground 2 side sinks for some reason from the initial engagement state shown in FIG. 12 (A), the second engagement member 5 becomes (B) by the urging force of the elastic urging means 16. In this way, sliding is performed while expanding the diameter obliquely downward along the engagement surfaces 9 and 11, and the engagement surface 11 of the second engagement member 5 further covers the outer peripheral portion of the engagement surface 9 of the first engagement member 4. If it gets over, it will shift to the engaged state one step lower as shown in (c). When the settlement on the ground 2 side is large, the second engaging member 5 is repeatedly moved downward in steps according to the size of the settlement, and the ground 2 as shown in the right half of FIG. The gap generated between the two sides is absorbed. As described above, in the process of changing the engagement state, each of the divided second engagement members 5 descends stepwise while repeating outward diameter expansion. In this embodiment, the engaging surface 9 of the first engaging member 4 and the engaging surface 11 of the second engaging member 5 are orthogonal to the inclined surface and the axis of the cylindrical body connected to the inclined surface as described above. When the second engaging member 5 receives an external force in the direction of ascending due to relative movement on the ground side or the like, the engaging surfaces 9 and 11 are formed in a sawtooth shape. Since the locking surfaces strongly oppose each other in a state of being bitten like a wedge, a large drag can be accurately obtained, and the radial restraining force required for the engagement mechanism can be reduced. it can.

図１３は本発明の他の実施例を示した設置状態説明図である。本実施例は、図示のように支圧板３に形成した挿通孔を介して上方へ突出するアンカー部材１の頭部が地盤２に対して傾斜している場合に簡便に対応できるように工夫したものである。すなわち、図１４及び図１５に示したように、中央にアンカー部材１の挿通孔１９を有し、上下面が相対的に傾斜した円板状のスペーサ２０を用い、図１３に示したように適数枚のスペーサ２０を第１係合部材４と第２係合部材５とから構成される前記係合機構組立体６の下面と支圧板３の上面との間に挟むことにより簡便に対応することができる。また、係合機構組立体６の下面を球面状に形成し、球面状の受け部により受けたり、支圧板３に形成した挿通孔で直接受けることによっても、アンカー部材１の傾斜に簡便に対応することができる。 FIG. 13 is an explanatory view of the installation state showing another embodiment of the present invention. The present embodiment is devised so that it can easily cope with the case where the head of the anchor member 1 protruding upward through the insertion hole formed in the bearing plate 3 is inclined with respect to the ground 2 as shown in the figure. Is. That is, as shown in FIG. 14 and FIG. 15, as shown in FIG. 13, the disc-shaped spacer 20 having the insertion hole 19 of the anchor member 1 in the center and the upper and lower surfaces being relatively inclined is used. A suitable number of spacers 20 can be easily handled by sandwiching them between the lower surface of the engagement mechanism assembly 6 composed of the first engagement member 4 and the second engagement member 5 and the upper surface of the bearing plate 3. can do. In addition, the lower surface of the engagement mechanism assembly 6 is formed into a spherical shape and is received by a spherical receiving portion or directly received by an insertion hole formed in the bearing plate 3 to easily cope with the inclination of the anchor member 1. can do.

本発明の一実施例を示した分解組立図である。1 is an exploded view showing an embodiment of the present invention. 第１係合部材を拡大して片側断面で示した部品説明図である。It is component explanatory drawing which expanded the 1st engaging member and was shown in the single-sided cross section. 同第１係合部材の平面を示した部品説明図である。It is component explanatory drawing which showed the plane of the 1st engaging member. 第２係合部材を拡大して内周面を示した部品説明図である。It is component explanatory drawing which expanded the 2nd engagement member and showed the internal peripheral surface. 同第２係合部材の外周面を示した部品説明図である。It is component explanatory drawing which showed the outer peripheral surface of the 2nd engagement member. 同第２係合部材の平面を示した部品説明図である。It is component explanatory drawing which showed the plane of the 2nd engaging member. 上記部品の組立説明図である。It is assembly explanatory drawing of the said components. 同部品の組立状態説明図である。It is an assembly state explanatory view of the parts. 拘束用のリングを拡大して示した部品説明図である。It is component explanatory drawing which expanded and showed the ring for restraint. 当初の設置状態を片側断面で示した設置状態説明図である。It is installation state explanatory drawing which showed the original installation state by the one-side cross section. 当初の設置状態と地盤が沈下した場合の設置状態を比較して示した設置状態説明図である。It is the installation state explanatory drawing which compared and showed the installation state when the initial installation state and the ground sink. 第１係合部材の係合面と第２係合部材の係合面との係合状態の変化の過程を示した係合状態説明図である。It is engagement state explanatory drawing which showed the process of the change of the engagement state of the engagement surface of a 1st engagement member, and the engagement surface of a 2nd engagement member. 本発明の他の実施例を示した設置状態説明図である。It is installation state explanatory drawing which showed the other Example of this invention. スペーサを示した部品説明図である。It is component explanatory drawing which showed the spacer. 同スペーサの平面を示した部品説明図である。It is component explanatory drawing which showed the plane of the spacer.

符号の説明Explanation of symbols

１：アンカー部材、２：地盤、３：支圧板、４：第１係合部材、５：第２係合部材、６：係合機構組立体、７：雄ねじ、８：雌ねじ、９：係合面、１０：スパナ掛け部、１１：係合面、１２：溝部、１３：リング、１４：水平部、１５：凹部、１６：弾性付勢手段、１７：締付ナット、１８：凹部、１９：挿通孔、２０：スペーサ 1: anchor member, 2: ground, 3: bearing plate, 4: first engaging member, 5: second engaging member, 6: engaging mechanism assembly, 7: male screw, 8: female screw, 9: engaging Surface: 10: Spanner hanger, 11: Engagement surface, 12: Groove, 13: Ring, 14: Horizontal, 15: Recess, 16: Elastic biasing means, 17: Clamping nut, 18: Recess, 19: Insertion hole, 20: Spacer

Claims

アンカー部材側に設置される第１係合部材と支圧板側に設置される第２係合部材とを備え、前記第１係合部材は、内面にアンカー部材の外周面に形成された雄ねじに螺合可能な雌ねじを有し、外面に係合部を設けた筒状体から構成するとともに、前記第２係合部材は、内面に前記第１係合部材の外面に設けた係合部に対して係合可能な係合部を有し、かつ軸心方向に複数に分割され、拘束手段により外部から拡縮径可能に拘束された筒状体から構成し、さらに前記第２係合部材とアンカー部材側に設置された受止部との間に弾性付勢手段を介在させるとともに、前記第１係合部材と第２係合部材との係合部を傾斜面と該傾斜面に連なる係止面から構成して下方へのみ移動可能に構成し、前記弾性付勢手段の付勢力により第２係合部材が前記傾斜面に沿って拡径しながら下方へ段階的に移動することにより地盤側とアンカー部材側との間に生じる間隙を吸収するように構成したことを特徴とする受圧装置。 A first engagement member installed on the anchor member side and a second engagement member installed on the bearing plate side, and the first engagement member is a male screw formed on the outer peripheral surface of the anchor member on the inner surface. The second engaging member is formed on the inner surface of the engaging portion provided on the outer surface of the first engaging member, and includes a threaded female screw and an outer surface provided with an engaging portion. A cylindrical body that has an engaging portion that can be engaged with each other, is divided into a plurality of portions in the axial direction, and is constrained so as to be able to expand and contract from the outside by a restraining means; and An elastic biasing means is interposed between the receiving portion installed on the anchor member side, and the engaging portion between the first engaging member and the second engaging member is connected to the inclined surface and the inclined surface. It comprises a stop surface and is configured to be movable only downward, and the second engagement member is tilted by the biasing force of the elastic biasing means. Receiving apparatus characterized by being configured to absorb a gap generated between the ground side and the anchor member side by stepwise moves downward while expanded along the surface.

前記第１係合部材と第２係合部材との係合部として、傾斜面と該傾斜面に連なる前記筒状体の軸線に直交する方向の係止面とからなる鋸歯状の係合溝を複数条設けたことを特徴とする請求項１に記載の受圧装置。 A serrated engaging groove comprising an inclined surface and a locking surface in a direction perpendicular to the axis of the cylindrical body connected to the inclined surface as an engaging portion between the first engaging member and the second engaging member. The pressure receiving device according to claim 1, wherein a plurality of lines are provided.

前記第２係合部材の内面に設けた係合部の曲率を第１係合部材の外面に設けた係合部の曲率より小さく設定したことを特徴とする請求項１又は２に記載の受圧装置。 3. The pressure receiving device according to claim 1, wherein a curvature of an engagement portion provided on an inner surface of the second engagement member is set smaller than a curvature of an engagement portion provided on an outer surface of the first engagement member. apparatus.

前記拘束手段が弾性リングからなることを特徴とする請求項１〜３のいずれか一項に記載の受圧装置。 The pressure receiving device according to any one of claims 1 to 3, wherein the restraining means includes an elastic ring.

前記弾性付勢手段がコイルスプリングからなることを特徴とする請求項１〜４のいずれか一項に記載の受圧装置。 The pressure receiving device according to any one of claims 1 to 4, wherein the elastic urging means comprises a coil spring.