JP6354270B2 - Friction damper - Google Patents
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Description
本発明は、建物架構等の構造物の振動を抑制する摩擦ダンパーに関する。 The present invention relates to a friction damper that suppresses vibration of a structure such as a building frame.
建物架構等の構造物の振動を減衰する装置として摩擦ダンパーが知られている。この摩擦ダンパーは、例えば建物架構の振動時に同架構のうちで互いに往復相対移動する一対の部材同士の間に介装等されて使用される。 A friction damper is known as a device for attenuating vibration of a structure such as a building frame. The friction damper is used, for example, by being interposed between a pair of members that reciprocally move relative to each other during vibration of the building frame.
かかる摩擦ダンパーの一例として、特許文献１には、図１及び図２に示すような摩擦ダンパー１１０が開示されている。なお、図１は建物架構１の概略立面図であり、図２は、図１中のＸ−Ｘ断面図である。 As an example of such a friction damper, Patent Document 1 discloses a friction damper 110 as shown in FIGS. 1 and 2. 1 is a schematic elevation view of the building frame 1, and FIG. 2 is a sectional view taken along line XX in FIG.
図１に示すように、この摩擦ダンパー１１０は、建物架構１の上記一対の部材５１，５２のうちの一方の部材５１に設けられる第１圧接板１１と、同一対の部材５１，５２のうちの他方の部材５２に設けられる第２圧接板２１（図１の例では、他方部材５２が第２圧接板２１を兼ねている）と、第２圧接板２１とによって第１圧接板１１を両面から挟み込む第３圧接板３１と、を有する。図２に示すように、第１圧接板１１には、所定方向に長い第１貫通孔１３が設けられ、第２圧接板２１には、正円形の第２貫通孔２３が設けられ、第３圧接板３１にも、正円形の第３貫通孔３３が設けられている。また、これら全ての貫通孔１３，２３，３３を貫いてボルト４１ｂが挿通されているとともに、同ボルト４１ｂにはナット４１ｎが螺合されており、当該ナット４１ｎで締結されることによって、これら第１乃至第３圧接板１１，２１，３１は、所定の圧接力で互いに圧接されている。 As shown in FIG. 1, the friction damper 110 includes a first pressure contact plate 11 provided on one member 51 of the pair of members 51 and 52 of the building frame 1, and the same pair of members 51 and 52. The second pressure contact plate 21 provided on the other member 52 (in the example of FIG. 1, the other member 52 also serves as the second pressure contact plate 21) and the second pressure contact plate 21 support the first pressure contact plate 11 on both sides. A third pressure contact plate 31 sandwiched between the first and second pressure plates. As shown in FIG. 2, the first pressure contact plate 11 is provided with a first through hole 13 that is long in a predetermined direction, the second pressure contact plate 21 is provided with a second circular through hole 23, and the third The pressure contact plate 31 is also provided with a third circular through hole 33 having a regular circular shape. A bolt 41b is inserted through all of the through holes 13, 23, 33, and a nut 41n is screwed to the bolt 41b. The first to third pressure plates 11, 21, 31 are pressed against each other with a predetermined pressure force.
そして、かかる摩擦ダンパー１１０によれば、建物架構１の振動によって第２圧接板２１が第１圧接板１１に対して摺動した際には、ボルト４１ｂと第２圧接板２１の第２貫通孔２３との係合、及び同ボルト４１ｂと第３貫通孔３３との係合を介して、第２圧接板２１から第３圧接板３１へと摺動方向の力Ｆｐが伝達されて、これにより、第３圧接板３１も、第２圧接板２１と連動して第１圧接板１１に対して摺動する。そして、その結果、第２圧接板２１の第１圧接板１１に対する摺動の摩擦力に加えて、更に第３圧接板３１の第１圧接板１１に対する摺動の摩擦力が生じて、これにより、大きな摩擦力を発生可能となっている。
ところで、かかる摩擦ダンパー１１０にあっては、図１に示すように、上記のボルト４１ｂを中心軸Ｃ３１として第３圧接板３１が回転する可能性があって、回転した場合には見た目が悪いなど問題となる虞があった。 By the way, in the friction damper 110, as shown in FIG. 1, there is a possibility that the third press-contact plate 31 rotates around the bolt 41b as the central axis C31. There was a risk of problems.
本発明は、かかる従来の課題に鑑みて成されたもので、圧接力の付与に供するボルト等の軸部材を中心軸として第３圧接板が回転することを抑制することにある。 The present invention has been made in view of such a conventional problem, and is to suppress the rotation of the third press contact plate about a shaft member such as a bolt used for applying a press contact force as a central axis.
かかる目的を達成するために請求項１に示す摩擦ダンパーは、
構造物において所定方向に相対移動する一対の部材の間に配置されて、前記相対移動に伴って摺動する圧接板同士の摩擦力により、前記相対移動を抑制する摩擦ダンパーであって、
前記一対の部材のうちの一方の部材に設けられ対面する２つの第１圧接板と、
前記一対の部材のうちの他方の部材に設けられ前記２つの第１圧接板の間に介在される第２圧接板と、
前記第２圧接板の両方の面側にそれぞれ設けられ、前記第２圧接板とともに前記第１圧接板を両面から所定の圧接力で挟み込む２つの第３圧接板と、
前記圧接力を付与すべく、前記第１圧接板の前記所定方向に長い第１貫通孔、前記第２圧接板の第２貫通孔、及び前記第３圧接板の第３貫通孔を挿通して設けられる軸部材と、を有し、
前記第１貫通孔によって前記第１圧接板に対する前記第２圧接板の前記所定方向の摺動が許容されるとともに、前記摺動に伴って前記第３圧接板が前記第１圧接板に対して前記所定方向に摺動するように、当該摺動させるための力が、前記軸部材の前記第２貫通孔及び前記第３貫通孔との係合を介して前記第２圧接板から前記第３圧接板へと伝達され、
各々の前記第３圧接板は、前記所定方向と交差する方向に前記第１圧接板及び前記第２圧接板より突出するように延出された延出部と、当該延出部に第４貫通孔を備え、
前記第２圧接板の両方の面側に各々設けられた前記第３圧接板の前記第４貫通孔に単一の挿通部材が挿通されて、前記第２圧接板の両方の面側に設けられた前記第３圧接板の回転が抑制されることを特徴とする。
In order to achieve this object, the friction damper shown in claim 1 is:
A friction damper that is disposed between a pair of members that move relative to each other in a predetermined direction in the structure, and that suppresses the relative movement by the frictional force between the pressure plates that slide with the relative movement,
Two first press-contact plates provided on one member of the pair of members and facing each other;
A second pressure contact plate provided on the other member of the pair of members and interposed between the two first pressure contact plates;
Two third pressure plates that are provided on both sides of the second pressure plate and sandwich the first pressure plate together with the second pressure plate from both sides with a predetermined pressure force; and
In order to apply the pressure contact force, the first pressure contact plate is inserted through the first through hole long in the predetermined direction, the second pressure contact plate second through hole, and the third pressure contact plate third through hole. A shaft member provided,
The first through hole allows the second pressure contact plate to slide in the predetermined direction relative to the first pressure contact plate, and the third pressure contact plate moves relative to the first pressure contact plate along with the sliding. In order to slide in the predetermined direction, the sliding force is applied from the second pressure contact plate to the third through the engagement of the shaft member with the second through hole and the third through hole. Transmitted to the pressure plate,
Each of the third pressure-contact plates extends in a direction intersecting the predetermined direction so as to protrude from the first pressure-contact plate and the second pressure-contact plate, and the extension portion has a fourth penetration. With holes,
A single insertion member is inserted into the fourth through hole of the third press contact plate provided on each of both surfaces of the second press contact plate, and provided on both surfaces of the second press contact plate. Further, the rotation of the third press contact plate is suppressed.
このような摩擦ダンパーによれば、第２圧接板の両方の面側に設けられた第３圧接板の第４貫通孔に単一の挿通部材が挿通されているので、第２圧接板の両方の面側に設けられた第３圧接板のうちの一方が回転する方向に力が作用すると、挿通部材により他方の第３圧接板にも同方向に回転する力が作用する。このとき、第３摩擦板にはいずれも圧接力が作用しているので、いずれか一方のみの圧接力にて回転を抑制する場合より回転を抑制することが可能である。 According to such a friction damper, since the single insertion member is inserted into the fourth through holes of the third press contact plate provided on both surfaces of the second press contact plate, both the second press contact plates When a force acts in the direction in which one of the third press contact plates provided on the surface side rotates, a force that rotates in the same direction also acts on the other third press contact plate by the insertion member. At this time, since the pressing force acts on the third friction plate, the rotation can be suppressed as compared with the case where the rotation is suppressed by only one of the pressing forces.
かかる摩擦ダンパーであって、
前記第４貫通孔は、前記所定方向において前記軸部材の両側に設けられた丸孔であり、
前記挿通部材は、棒状の部材であることが望ましい。
Such a friction damper,
The fourth through hole is a round hole provided on both sides of the shaft member in the predetermined direction,
The insertion member is preferably a rod-shaped member.
このような摩擦ダンパーによれば、丸孔に棒状の部材を挿通する簡単な構成で、第２圧接板の両方の面側に設けられた第３圧接板の回転をいずれも抑制することが可能である。また、棒状の部材を所定方向において軸部材の両側に設けることによりいずれの方向の回転も抑制することが可能である。 According to such a friction damper, it is possible to suppress any rotation of the third press contact plate provided on both sides of the second press contact plate with a simple configuration in which a rod-like member is inserted into the round hole. It is. Further, by providing rod-shaped members on both sides of the shaft member in a predetermined direction, rotation in any direction can be suppressed.
また、摩擦ダンパーであって、
前記第４貫通孔は、前記所定方向に長い長孔であり、前記所定方向において前記軸部材の両側に渡るように設けられており、
前記挿通部材は、板状の部材であることとしてもよい。
It is a friction damper,
The fourth through hole is a long hole that is long in the predetermined direction, and is provided so as to cross over both sides of the shaft member in the predetermined direction.
The insertion member may be a plate-like member.
このような摩擦ダンパーによれば、長孔に板状の部材を挿通する簡単な構成で、第２圧接板の両方の面側に設けられた第３圧接板の回転をいずれも抑制することが可能である。また、長孔を所定方向において軸部材の両側に渡るように設け、板状の部材を挿通することによりいずれの方向の回転も抑制することが可能である。 According to such a friction damper, it is possible to suppress any rotation of the third press contact plate provided on both sides of the second press contact plate with a simple configuration in which the plate-like member is inserted into the long hole. Is possible. Further, it is possible to suppress rotation in any direction by providing a long hole so as to extend on both sides of the shaft member in a predetermined direction and inserting a plate-like member.
かかる摩擦ダンパーであって、前記挿通部材は、前記一対の部材、前記第１圧接板、前記第２圧接板のうちのいずれかに近接させて挿通されていることが望ましい。 In this friction damper, it is preferable that the insertion member is inserted close to any one of the pair of members, the first pressure contact plate, and the second pressure contact plate.
このような摩擦ダンパーによれば、挿通部材が、近接する一対の部材、第１圧接板、第２圧接板のうちのいずれかに当接して回転が抑制される。すなわち、挿通部材と、一対の部材、第１圧接板、第２圧接板のいずれかとの距離が近ければ近いほど、回転を小さく抑えることが可能である。 According to such a friction damper, the insertion member abuts on any one of a pair of adjacent members, the first pressure contact plate, and the second pressure contact plate, and rotation is suppressed. That is, the closer the distance between the insertion member and any of the pair of members, the first pressure contact plate, and the second pressure contact plate is, the smaller the rotation can be suppressed.
本発明に係る摩擦ダンパーによれば、圧接力の付与に供するボルト等の軸部材を中心軸として第３圧接板が回転することを抑制することができる。 According to the friction damper according to the present invention, it is possible to suppress the rotation of the third press contact plate about the shaft member such as a bolt used for applying the press contact force as the central axis.
図３は、本発明の一実施形態の摩擦ダンパー１０が設けられた建物架構１の概略立面図である。また、図４は、図３に示す摩擦ダンパーの縦断面図であり、図５は、摩擦ダンパーの構成を示す断面図である。更に、図６Ａは、図４中のＡ−Ａ矢視図、図６Ｂは、図４中のＢ−Ｂ矢視図、図６Ｃは、図４中のＣ−Ｃ矢視図、図６Ｄは、図４中のＤ−Ｄ矢視図である。 FIG. 3 is a schematic elevation view of the building frame 1 provided with the friction damper 10 according to the embodiment of the present invention. 4 is a longitudinal sectional view of the friction damper shown in FIG. 3, and FIG. 5 is a sectional view showing a configuration of the friction damper. Furthermore, FIG. 6A is an AA arrow view in FIG. 4, FIG. 6B is a BB arrow view in FIG. 4, FIG. 6C is a CC arrow view in FIG. 4, and FIG. FIG. 5 is a DD arrow view in FIG. 4.
本実施形態の摩擦ダンパー１０は、建物架構１としての柱梁架構１のＨ形鋼のブレース５に組み込まれている。すなわち、この摩擦ダンパー１０が組み込まれるブレース５は、適宜位置で互いに間隔Ｓ１を隔てるように分断されて、図３に示すように一対のフランジ分断片５１，５２（一対の部材に相当）が形成されており、これらフランジ分断片５１，５２同士は、ブレース５の架け渡し方向（所定方向に相当し、以下では、ブレース架け渡し方向とも言う）に相対移動可能に構成されている。 The friction damper 10 according to the present embodiment is incorporated in an H-section steel brace 5 of a column beam frame 1 as a building frame 1. That is, the brace 5 in which the friction damper 10 is incorporated is divided at an appropriate position so as to be spaced from each other by a distance S1, thereby forming a pair of flange segment pieces 51 and 52 (corresponding to a pair of members) as shown in FIG. These flange segment pieces 51 and 52 are configured to be relatively movable in the bridging direction of the brace 5 (corresponding to a predetermined direction, hereinafter also referred to as the brace bridging direction).
摩擦ダンパー１０は、図４に示すように、一方のフランジ分断片５１のフランジ５１Ｆの両面にそれぞれフィラープレート５０を介在してボルト止めされた対面する２つの第１圧接板１１と、２つの第１圧接板１１の間に介在され他方のフランジ分断片５２のフランジ５２Ｆがそのまま流用された第２圧接板２１と、第２圧接板２１の両方の面側にそれぞれ設けられ、第２圧接板２１とともに第１圧接板１１を両面から所定の圧接力で挟み込む２つの第３圧接板３１と、を有している。 As shown in FIG. 4, the friction damper 10 includes two first press-contact plates 11 facing each other and bolted to both surfaces of the flange 51 </ b> F of one flange segment 51 via a filler plate 50. The second press-contact plate 21 is provided between both the second press-contact plate 21 and the second press-contact plate 21 which are interposed between the first press-contact plates 11 and the flange 52F of the other flange segment 52 is used as it is. In addition, there are two third pressure plates 31 that sandwich the first pressure plate 11 from both sides with a predetermined pressure force.
ここで、第１圧接板１１の表裏両面には、それぞれ、滑動板１５の一例としてのステンレス板が移動不能に固着されている一方、これら滑動板１５，１５と対向する第２圧接板２１及び第３圧接板３１，３１の各面には、それぞれ摩擦板２５，３５が移動不能に固着されている。この固着方法としては、例えば、（１）接着による方法、（２）固着面を構成する各々の表面について表面粗さの増大化処理（第１圧接板１１，１１、第２圧接板２１、第３圧接板３１，３１、滑動板１５及び摩擦板２５，３５の各表面の目荒らしや、ショットブラスト等）を施して、固着面で相対滑りが生じないようにする方法、（３）嵌合による方法等が挙げられる。 Here, a stainless plate as an example of the sliding plate 15 is fixed to the front and back surfaces of the first pressing plate 11 so as not to move, while the second pressing plate 21 facing the sliding plates 15 and 15, and The friction plates 25 and 35 are fixed to the respective surfaces of the third press contact plates 31 and 31 so as not to move. As this fixing method, for example, (1) a method by adhesion, (2) surface roughness increasing treatment (first pressure contact plates 11, 11, second pressure contact plate 21, first surface) for each surface constituting the fixed surface (3) fitting by applying roughening or shot blasting on the surfaces of the three pressure contact plates 31 and 31, the sliding plate 15 and the friction plates 25 and 35 to prevent relative slippage on the fixing surface. And the like.
一方、図４に示すように、２つの第１圧接板１１，１１、第２圧接板２１および２つの第３圧接板３１，３１には、それぞれ、第１貫通孔１３、第２貫通孔２３、第３貫通孔３３が板厚方向に貫通形成されているとともに、これらの貫通孔１３，２３，３３には串刺し状に、鋼製の丸パイプ４７（断面正円形状のパイプで、パイプ部材に相当）が通され、更に、当該丸パイプ４７には、管軸方向に沿って高力ボルト４１ｂ（ボルト部材に相当）が挿通されている。そして、この高力ボルト４１ｂの先端部にはナット４１ｎが螺着されており、これら高力ボルト４１ｂ及びナット４１ｎによって、第１圧接板１１，１１は、第２圧接板２１と第３圧接板３１，３１とに挟まれた状態で締結され、この挟み込みによる上記圧接力が板厚方向に付与されている。 On the other hand, as shown in FIG. 4, the two first pressure plates 11, 11, the second pressure plate 21, and the two third pressure plates 31, 31 have a first through hole 13 and a second through hole 23, respectively. The third through-hole 33 is formed in the plate thickness direction, and the through-holes 13, 23, 33 are skewered into a steel round pipe 47 (a pipe having a circular cross-section and a pipe member). Further, a high-strength bolt 41b (corresponding to a bolt member) is inserted into the round pipe 47 along the tube axis direction. And the nut 41n is screwed by the front-end | tip part of this high strength volt | bolt 41b, The 1st press plate 11 and 11 are the 2nd press plate 21 and the 3rd press plate by these high strength volt | bolts 41b and nut 41n. It is fastened in a state of being sandwiched between 31 and 31, and the pressure contact force due to the sandwiching is applied in the thickness direction.
よって、この圧接力により、第１圧接板１１，１１の滑動板１５，１５に対して第２圧接板２１の摩擦板２５及び第３圧接板３１，３１の摩擦板３５は押圧され、摺動時には上記の圧接力に応じた摩擦力Ｆｆを生じる（図５を参照）。そして、この摩擦力Ｆｆが柱梁架構１の振動の減衰力となる。なお、高力ボルト４１ｂの頭部と第２圧接板２１との間、及びナット４１ｎと第３圧接板３１，３１との間にはそれぞれ皿ばね４３が介装されており、これら皿ばね４３の弾発力により圧接力の大きさの安定化が図られている。但し、かかる皿ばね４３は、必須構成ではなく、無くても良い。また、この例では、丸パイプ４７及び高力ボルト４１ｂが、請求項に係る「軸部材」に相当している。 Therefore, by this pressure contact force, the friction plate 25 of the second pressure contact plate 21 and the friction plate 35 of the third pressure contact plate 31, 31 are pressed against the sliding plates 15, 15 of the first pressure contact plates 11, 11 to slide. Occasionally, a frictional force Ff corresponding to the pressure contact force is generated (see FIG. 5). The frictional force Ff becomes a damping force for vibration of the column beam frame 1. A disc spring 43 is interposed between the head of the high-strength bolt 41b and the second press-contact plate 21 and between the nut 41n and the third press-contact plates 31 and 31, respectively. The size of the pressure contact force is stabilized by the elastic force of. However, the disc spring 43 is not an essential component and may be omitted. In this example, the round pipe 47 and the high-strength bolt 41b correspond to the “shaft member” according to the claims.
ところで、上記の摺動をブレース架け渡し方向について許容すべく、第１圧接板１１の第１貫通孔１３は、ブレース架け渡し方向に沿って長い長孔に形成されている（図６Ｃを参照）。すなわち、この長孔でなる第１貫通孔１３によって、柱梁架構１のブレース分断片５１，５２同士のブレース架け渡し方向の相対移動に伴い、第１圧接板１１に対して第２圧接板２１及び第３圧接板３１，３１が、ブレース架け渡し方向に摺動可能になっている。 By the way, in order to allow the above-mentioned sliding in the brace spanning direction, the first through hole 13 of the first pressure contact plate 11 is formed as a long hole along the brace spanning direction (see FIG. 6C). . That is, the second pressure contact plate 21 with respect to the first pressure contact plate 11 is associated with the relative movement of the brace segments 51 and 52 of the column beam frame 1 in the brace spanning direction by the first through holes 13 that are long holes. And the 3rd press-contact plates 31 and 31 are slidable in the brace bridging direction.
これに対して、第２圧接板２１の第２貫通孔２３及び第３圧接板３１，３１の第３貫通孔３３の方は、丸パイプ４７との間に形成されるブレース掛け渡し方向の隙間Ｓ２が第１貫通孔１３の場合よりも小さく、しかも、当該隙間Ｓ２が極力小さくなるような孔径の正円に設定されている（図５を参照）。 On the other hand, the second through hole 23 of the second press contact plate 21 and the third through hole 33 of the third press contact plate 31, 31 are formed between the round pipe 47 and the gap in the brace spanning direction. S2 is smaller than the case of the first through hole 13, and the hole S2 is set to be a perfect circle having a hole diameter that is as small as possible (see FIG. 5).
この理由は、この摩擦ダンパー１０にあっては、丸パイプ４７と第２貫通孔２３及び第３貫通孔３３との当接・係合によって、第１圧接板１１に対する第２圧接板２１の摺動に伴わせて各第３圧接板３１，３１も摺動させるようにしているためである。 The reason for this is that in the friction damper 10, the second pressure contact plate 21 is slid against the first pressure contact plate 11 by the contact / engagement of the round pipe 47 with the second through hole 23 and the third through hole 33. This is because the third press contact plates 31 are also slid along with the movement.
詳しくは、柱梁架構１が振動する際に、図５に示すように、他方のブレース分断片５２たる第２圧接板２１にあっては、振動に伴う外力Ｐが柱梁架構１から直接入力されて、これにより第２圧接板２１は第１圧接板１１に対して摺動し、この摺動により各々の摩擦ダンパー１０により摩擦力Ｆｆを発生して上記振動の減衰力とするが、第３圧接板３１，３１にあっては、他方のブレース分断片５２には直結されておらず、それ故に、摺動に要する力を、第２圧接板２１から丸パイプ４７を介して付与される必要があるためである。 Specifically, when the column beam frame 1 vibrates, as shown in FIG. 5, in the second pressure contact plate 21 as the other brace segment 52, the external force P accompanying the vibration is directly input from the column beam frame 1. As a result, the second pressure contact plate 21 slides with respect to the first pressure contact plate 11, and by this sliding, each friction damper 10 generates a frictional force Ff as a damping force for the vibration. The three pressure contact plates 31 and 31 are not directly connected to the other brace segment 52, and therefore a force required for sliding is applied from the second pressure contact plate 21 via the round pipe 47. This is necessary.
つまり、図５に示すように、第２圧接板２１に作用する上記外力Ｐの一部の力は、丸パイプ４７と第２貫通孔２３の内周面との当接・係合による支圧力Ｆｐとして第２圧接板２１から丸パイプ４７へと伝達され、そして、丸パイプ４７に伝達された支圧力Ｆｐは、丸パイプ４７内で剪断力Ｆｓの形態を経た後に、丸パイプ４７と第３貫通孔３３の内周面との当接・係合によって第３圧接板３１，３１へと伝達され、その結果、この伝達された支圧力Ｆｐによって第３圧接板３１，３１は第１圧接板１１、１１に対して摺動する。そして、この摺動に伴って第３圧接板３１，３１と第１圧接板１１，１１との間には摩擦力Ｆｆが発生し、上記の振動の減衰に寄与する。 That is, as shown in FIG. 5, a part of the external force P acting on the second pressure contact plate 21 is a support pressure due to contact / engagement between the round pipe 47 and the inner peripheral surface of the second through hole 23. Fp is transmitted from the second pressure contact plate 21 to the round pipe 47 as Fp, and the support pressure Fp transmitted to the round pipe 47 undergoes the form of the shearing force Fs in the round pipe 47 and then the round pipe 47 and the third pipe 47. The pressure is transmitted to the third pressure contact plates 31 and 31 by contact / engagement with the inner peripheral surface of the through hole 33. As a result, the third pressure contact plates 31 and 31 are transmitted to the first pressure contact plate by the transmitted support pressure Fp. 11, 11 slides. Along with this sliding, a frictional force Ff is generated between the third press contact plates 31 and 31 and the first press contact plates 11 and 11 and contributes to the attenuation of the vibration.
従って、これら第２貫通孔２３及び第３貫通孔３３の孔径は、施工時に丸パイプ４７を通すのに問題の無い範囲内で極力小さくするのが望ましく、例えば、丸パイプ４７を挿通させた際の丸パイプ４７との隙間Ｓ２が、ブレース掛け渡し方向について０．１〜３．０ｍｍの範囲にすると良い。そうすれば、施工時の丸パイプ４７の通し作業を容易にしながらも、摺動に必要な支圧力Ｆｐを第３圧接板３１，３１へ確実に伝達可能となる。ただし、第３貫通孔３３は、摺動開始タイミングを異ならせるためにブレース掛け渡し方向について長い長孔にする場合がある。これは、二つの第３圧接板３１，３１の摺動開始タイミングをずらして、摩擦力ΣＦｆの大きさを二段階で切り替えるものである。例えば、ブレース掛け渡し方向の相対移動量の所定範囲では、小さい摩擦力ΣＦｆで振動を減衰するとともに、所定範囲以外の範囲では、大きな摩擦力ΣＦｆで振動を減衰したいという場合もあり得る。そして、その場合には、図７に示すように、第２貫通孔２３を、ブレース掛け渡し方向に前記孔径よりも長い長孔に形成する。このようにすれば、第３圧接板３１の摺動開始は、ブレース掛け渡し方向に関する第２圧接板に設けた長孔の分だけ遅れて摺動を開始する。よって、第１圧接板と第２圧接板の摺動に対し、二つの第３圧接板３１，３１の摺動開始タイミングを異ならせることができる。 Therefore, it is desirable that the diameters of the second through hole 23 and the third through hole 33 be as small as possible without causing a problem in passing the round pipe 47 during construction. For example, when the round pipe 47 is inserted, The clearance S2 with the round pipe 47 is preferably in the range of 0.1 to 3.0 mm in the bracing direction. If it does so, it will become possible to transmit the supporting pressure Fp required for sliding to the 3rd press-contacting plates 31 and 31 reliably, making it easy to pass the round pipe 47 at the time of construction. However, the third through hole 33 may be a long hole in the bracing direction in order to vary the sliding start timing. This is to switch the magnitude of the frictional force ΣFf in two steps by shifting the sliding start timing of the two third press contact plates 31, 31. For example, there may be a case where it is desired to attenuate the vibration with a small frictional force ΣFf in a predetermined range of the relative movement amount in the bracing direction and to attenuate the vibration with a large frictional force ΣFf in a range other than the predetermined range. In that case, as shown in FIG. 7, the second through hole 23 is formed as a long hole longer than the hole diameter in the brace extending direction. If it does in this way, the start of sliding of the 3rd press-contact plate 31 will start a slide with a delay by the length of the long hole provided in the 2nd press-contact plate regarding the brace spanning direction. Therefore, the sliding start timing of the two third press contact plates 31 and 31 can be made different from the slide of the first press contact plate and the second press contact plate.
ちなみに、上記隙間Ｓ２を零に設定した理想状態の場合には、この摩擦ダンパー１０は、図８に示すような振動エネルギー吸収履歴特性を示す。このグラフは、ブレース掛け渡し方向に所定振幅δ０で強制加振して得られるグラフであり、横軸には、ブレース掛け渡し方向の相対変位δを示し、縦軸には、摩擦ダンパー１０が発生する摩擦力の総和ΣＦｆを示している。 Incidentally, in the ideal state where the gap S2 is set to zero, the friction damper 10 exhibits vibration energy absorption history characteristics as shown in FIG. This graph is a graph obtained by forcibly oscillating with a predetermined amplitude δ0 in the brace spanning direction. The horizontal axis represents the relative displacement δ in the brace spanning direction, and the vertical axis represents the friction damper 10. The total sum ΣFf of the frictional forces to be performed is shown.
ここで、グラフ中の摩擦力Ｆｆ０は、滑動板１５と摩擦板２５，３５との摩擦係数をμとし、圧接力をＮとした場合に下式で表される。
Ｆｆ０＝４×μ×Ｎ
なお、上式中の「４」という数値の意味は、上記の摩擦ダンパー１０が摩擦力Ｆｆを発生する摺動面を４面有する４面摩擦の摩擦ダンパーであるからである。また、図５中における剪断力Ｆｓ、支圧力Ｆｐ、摩擦力Ｆｆ、及び外力Ｐは、次のような釣り合い関係にあるのは言うまでもない。
Ｆｓ＝Ｆｐ＝Ｆｆ
Ｐ＝４×Ｆｆ
なお、望ましくは、図５に示すように高力ボルト４１ｂと丸パイプ４７との間に隙間を設けると良く、より望ましくは、当該隙間の大きさＧを、設計で想定する限界状態（例えば、弾性限界）まで変形状態の丸パイプ４７において当該丸パイプ４７の内周面と高力ボルト４１ｂとが当接しないようなサイズにすると良い。そして、このように設定すれば、第３圧接板３１，３１を摺動させるための支圧力Ｆｐは、専ら丸パイプ４７のみに作用して高力ボルト４１ｂには作用しないので、高力ボルト４１ｂの健全性を高い状態に維持可能となる。
Here, the frictional force Ff0 in the graph is expressed by the following equation when the friction coefficient between the sliding plate 15 and the friction plates 25 and 35 is μ and the pressure contact force is N.
Ff0 = 4 × μ × N
The numerical value “4” in the above formula is because the friction damper 10 is a four-surface friction friction damper having four sliding surfaces that generate the frictional force Ff. Needless to say, the shearing force Fs, the supporting pressure Fp, the frictional force Ff, and the external force P in FIG. 5 are in the following balanced relationship.
Fs = Fp = Ff
P = 4 × Ff
Desirably, a gap is provided between the high-strength bolt 41b and the round pipe 47 as shown in FIG. 5, and more desirably, the size G of the gap is a limit state (for example, The round pipe 47 in a deformed state up to the elastic limit) may be sized so that the inner peripheral surface of the round pipe 47 and the high-strength bolt 41b do not contact each other. If set in this way, the supporting pressure Fp for sliding the third press contact plates 31 and 31 acts only on the round pipe 47 and not on the high strength bolt 41b. It becomes possible to maintain the soundness of the plant at a high level.
また、望ましくは、図５に示すように、丸パイプ４７の全長を、その管軸方向の両端が第３貫通孔３３から外方に突出しないような長さに設定するとともに、第３圧接板３１，３１の皿ばね４３側の面に、それぞれ孔部４５ａ付きの薄板４５を固着し、更に、これら薄板４５，４５の孔部４５ａ，４５ａの孔径を、丸パイプ４７の外径よりも小径に設定すると良い。このようにすれば、当該丸パイプ４７は薄板４５，４５によって管軸方向の移動が規制されるので、第３、第２、第１貫通孔３３，２３，１３からの丸パイプ４７の抜け落ちは確実に防止される。なお、これら薄板４５，４５を、摩擦係数の低い素材で構成するか又は同素材でコーティングすれば、これら薄板４５，４５に当接する皿ばね４３の角部の摩耗を低減できる。 Further, preferably, as shown in FIG. 5, the total length of the round pipe 47 is set such that both ends in the tube axis direction do not protrude outward from the third through-hole 33, and the third pressure contact plate The thin plate 45 with the hole 45 a is fixed to the surface of the disc spring 43 side of 31, 31, and the diameter of the holes 45 a, 45 a of the thin plates 45, 45 is smaller than the outer diameter of the round pipe 47. It is good to set to. In this way, the movement of the round pipe 47 in the tube axis direction is restricted by the thin plates 45, 45, so that the drop off of the round pipe 47 from the third, second, and first through holes 33, 23, 13 is prevented. It is surely prevented. In addition, if these thin plates 45 and 45 are comprised with a raw material with a low friction coefficient, or coat with the same material, abrasion of the corner | angular part of the disc spring 43 which contact | abuts these thin plates 45 and 45 can be reduced.
ところで、図６Ａ〜図６Ｄに示すように、この第３圧接板３１，３１は、その平面形状の中央（好ましくは図心）に第３貫通孔３３が形成され、これにより当該図心に上記の高力ボルト４１ｂ及び丸パイプ４７が配置されている。また、設計図上では、各第３圧接板３１，３１の平面形状においてほぼ矩形状をなす外形の四辺のうちの二辺３１ａ，３１ａがブレース掛け渡し方向と平行になった状態を目標配置状態として、第３圧接板３１，３１は配置されている。 By the way, as shown in FIGS. 6A to 6D, the third press-contact plates 31, 31 have a third through hole 33 formed in the center (preferably centroid) of the planar shape. The high-strength bolt 41b and the round pipe 47 are arranged. In addition, on the design drawing, a state in which the two sides 31a and 31a of the four sides of the outer shape having a substantially rectangular shape in the planar shape of each third pressure contact plate 31 and 31 are parallel to the bracing direction is the target arrangement state. As a result, the third pressure contact plates 31, 31 are arranged.
しかし、摩擦ダンパー１０の作動中に、第３圧接板３１，３１は、高力ボルト４１ｂ（又は丸パイプ４７）を中心軸Ｃ３１，Ｃ３１として回転する虞がある。そして、回転した場合には、第３圧接板３１，３１が、設計図上での目標配置状態とは異なる状態となってしまい、見た目が悪いなどの問題となり得る。 However, during the operation of the friction damper 10, the third press contact plates 31, 31 may rotate with the high-strength bolt 41b (or the round pipe 47) as the central axes C31, C31. And when it rotates, the 3rd press-contact plates 31 and 31 will be in the state different from the target arrangement | positioning state on a design drawing, and it may become problems, such as a bad appearance.
そこで、本実施形態の摩擦ダンパー１０では、第２圧接板２１の両方の面側にそれぞれ設けられた２つの第３圧接板３１、３１にそれぞれフランジ５２Ｆより外側に延出させた延出部と、当該延出部に第４貫通孔３４を設けるとともに、２つの第３圧接板３１の第４貫通孔３４に、例えば単一の挿通部材としての棒状の鋼材４４を挿通させることにより、互いに回転をより抑制することとした。 Therefore, in the friction damper 10 according to the present embodiment, the extension portions that are extended outward from the flange 52F on the two third press contact plates 31, 31 respectively provided on both surface sides of the second press contact plate 21; In addition, the fourth through hole 34 is provided in the extended portion, and the rod-like steel material 44 as a single insertion member is inserted into the fourth through hole 34 of the two third press-contact plates 31 to rotate each other. It was decided to suppress more.
図９は、フランジの両方の面側にそれぞれ設けられた第３圧接板同士を棒状の鋼材により互いに回転を抑制する構成を示す平面図である。図１０は、図９におけるＥ−Ｅ矢視図である。 FIG. 9 is a plan view showing a configuration in which the third press contact plates provided on both surface sides of the flange are restrained from rotating with each other by a rod-shaped steel material. FIG. 10 is an EE arrow view in FIG. 9.
より具体的には、摩擦ダンパー１０は、図９に示すように、Ｈ型鋼の幅方向（ブレース架け渡し方向と交差する方向）におけるウエブ５１Ｗ，５２Ｗの両側にて、それぞれ一対のフランジ分断片５１，５２に架け渡し、図１０に示すように、ウエブ５１Ｗ，５２Ｗの上下に位置する２つのフランジ５１，５２にそれぞれ設けられている。 More specifically, as shown in FIG. 9, the friction damper 10 includes a pair of flange segment pieces 51 on both sides of the webs 51 </ b> W and 52 </ b> W in the width direction of H-shaped steel (direction intersecting the brace bridging direction). , 52 and provided on two flanges 51, 52 located above and below the webs 51W, 52W, respectively, as shown in FIG.
そして、フランジ５２Ｆの各々の面側にそれぞれ設けられた各第３圧接板３１，３１に、フランジ５２Ｆ、第１圧接板１１および第２圧接板２１より、フランジ５２Ｆの幅方向においてウエブ５２Ｗと反対側に延出させた延出部３１ｂ，３１ｂと、当該延出部３１ｂ，３１ｂに第４貫通孔３４を各々設けておく。このとき、第４貫通孔３４，３４は、各第３圧接板３１，３１の延出部３１ｂ，３１ｂに、ブレース掛け渡し方向において高力ボルト４１ｂの両側に位置するように２つ設けられている。より好ましくは各第３圧接板３１，３１の延出部３１ｂ，３１ｂにおいて、ブレース掛け渡し方向における両端部側に設けられている。 Then, the third press contact plates 31 and 31 provided on the respective surface sides of the flange 52F are opposite to the web 52W in the width direction of the flange 52F than the flange 52F, the first press contact plate 11 and the second press contact plate 21. The extension parts 31b and 31b extended to the side, and the fourth through holes 34 are provided in the extension parts 31b and 31b, respectively. At this time, two fourth through holes 34, 34 are provided in the extending portions 31 b, 31 b of the third press contact plates 31, 31 so as to be positioned on both sides of the high strength bolt 41 b in the brace extending direction. Yes. More preferably, the extended portions 31b and 31b of the third press contact plates 31 and 31 are provided on both end sides in the brace extending direction.
そして、第２圧接板２１の両方の面側にそれぞれ設けられた第３圧接板３１、３１の延出部３１ｂ，３１ｂの第４貫通孔３４，３４に棒状の鋼材４４を挿通させることにより、フランジ５２Ｆ（第２圧接板２１）の両側に設けられた２つの第３圧接板３１，３１のうちの一方の第３圧接板３１に作用する摩擦力を他方の第３圧接板３１にも作用するように構成している。このとき、第４貫通孔３４，３４に挿通させた棒状の鋼材４４が上下方向に挿通される場合には、鋼材４４の上端に第４貫通孔３４より太い部位４４ａを形成しておく。これにより第３圧接板３１，３１に鋼材４４が挿通されている状態を維持することが可能である。また、フランジ５２Ｆが鉛直な面をなしている場合には、鋼材４４は水平方向に挿通されるので、鋼材４４の一方の端に第４貫通孔３４より太い部位を形成し、２つの第３圧接板３１，３１に鋼材４４が挿通された後に、鋼材４４の他方の端に抜け止め部材を設けておくことが望ましい。例えば、鋼材として２つの第３圧接板３１，３１にボルトを挿通し、ボルトの先端側にナットを螺合しておくことが望ましい。このとき、２つの第３圧接板３１，３１には圧接力が作用する必要はなく、鋼材４４が挿通されていれば構わない。 Then, by inserting the rod-shaped steel material 44 through the fourth through holes 34, 34 of the extended portions 31b, 31b of the third pressure contact plates 31, 31 provided on both surface sides of the second pressure contact plate 21, respectively. The frictional force acting on one third pressure contact plate 31 of the two third pressure contact plates 31, 31 provided on both sides of the flange 52 </ b> F (second pressure contact plate 21) also acts on the other third pressure contact plate 31. It is configured to do. At this time, when the rod-shaped steel material 44 inserted through the fourth through holes 34, 34 is inserted vertically, a portion 44 a thicker than the fourth through hole 34 is formed at the upper end of the steel material 44. Thereby, it is possible to maintain the state in which the steel material 44 is inserted through the third press contact plates 31 and 31. Further, when the flange 52F has a vertical surface, the steel material 44 is inserted in the horizontal direction, so that a portion thicker than the fourth through-hole 34 is formed at one end of the steel material 44, and the two third thirds are formed. It is desirable to provide a retaining member at the other end of the steel material 44 after the steel material 44 has been inserted into the press contact plates 31 and 31. For example, it is desirable to insert a bolt into the two third press contact plates 31 and 31 as a steel material, and to screw a nut to the tip side of the bolt. At this time, it is not necessary for a pressure contact force to act on the two third pressure plates 31, 31, as long as the steel material 44 is inserted.
各々の第３圧接板３１，３１は、鋼材４４により互いに係合されることにより、係合された２つの第３圧接板３１，３１が連動するように構成されている。前述したように、柱梁架構１が振動する際には、各第３圧接板３１，３１が第１圧接板１１、１１に対して摺動すると、この摺動に伴って第３圧接板３１，３１と第１圧接板１１，１１との間には摩擦力Ｆｆが発生する。このため、柱梁架構１が振動する際に各第３圧接板３１，３１に作用する力が摩擦力Ｆｆより小さい場合には、この摩擦力Ｆｆにより、各々の第３圧接板３１は摺動しない。また、柱梁架構１の振動により各第３圧接板３１，３１に作用する力が摩擦力Ｆｆより大きくなったとしても、第３圧接板３１，３１の第４貫通孔３４の内周面に鋼材４４が当接されることにより２つの第３圧接板３１が鋼材４４により繋り、２つの第３圧接板３１，３１には、各々互いに他の第３圧接板３１の摩擦力Ｆｆも作用する。このため、鋼材４４が挿通されていない場合より、柱梁架構１の振動による第３圧接板３１，３１の回転を抑制することが可能である。 Each of the third press contact plates 31, 31 is configured to be engaged with each other by the steel material 44 so that the two engaged third press contact plates 31, 31 are interlocked. As described above, when the column beam frame 1 vibrates, when the third press contact plates 31, 31 slide with respect to the first press contact plates 11, 11, the third press contact plate 31 accompanies this sliding. , 31 and the first press contact plates 11, 11 generate a frictional force Ff. For this reason, when the force acting on each of the third press contact plates 31 and 31 when the column beam frame 1 vibrates is smaller than the friction force Ff, each of the third press contact plates 31 slides due to the friction force Ff. do not do. Even if the force acting on the third press contact plates 31, 31 is greater than the frictional force Ff due to the vibration of the column beam frame 1, the inner surface of the fourth through hole 34 of the third press contact plate 31, 31 is applied. By contacting the steel material 44, the two third pressure contact plates 31 are connected by the steel material 44, and the friction force Ff of the other third pressure contact plate 31 also acts on each of the two third pressure contact plates 31, 31. To do. For this reason, it is possible to suppress the rotation of the 3rd press-contact plates 31 and 31 by the vibration of the column beam frame 1 rather than the case where the steel material 44 is not penetrated.
更に、柱梁架構１の振動により各第３圧接板３１，３１に作用する力が、単体の第３圧接板３１，３１に作用する２倍の摩擦力（２Ｆｆ）より大きくなった場合には、係合された２つの第３圧接板３１，３１のうちのいずれか、または、両方が摺動しつつ回転し始めるが、フランジ５２Ｆ及び２つの第１圧接板１１を挟んで設けられている第３圧接板３１，３１に挿通された鋼材４４が、フランジ５２Ｆまたは２つの第１圧接板１１のいずれかに接触することにより、第３圧接板３１，３１の回転が規制される。このため、柱梁架構１の振動による各第３圧接板３１，３１の回転をより抑制することが可能である。 Further, when the force acting on each third pressure contact plate 31, 31 due to the vibration of the column beam frame 1 becomes larger than the double frictional force (2Ff) acting on the single third pressure contact plate 31, 31. One or both of the two engaged third pressure plates 31 and 31 start to rotate while sliding, but are provided with the flange 52F and the two first pressure plates 11 interposed therebetween. When the steel material 44 inserted through the third press contact plates 31 and 31 comes into contact with either the flange 52F or the two first press contact plates 11, the rotation of the third press contact plates 31 and 31 is restricted. For this reason, it is possible to further suppress the rotation of the third press contact plates 31 and 31 due to the vibration of the column beam frame 1.
このように、棒状の鋼材４４にてフランジ５２Ｆの両方の面側の第３圧接板３１，３１を連動させることにより、各々の第３圧接板３１，３１に作用する摩擦力を大きくして各々の第３圧接板３１，３１の回転を抑制することが可能である。この場合には、各第３圧接板３１，３１に設けた延出部３１ｂ，３１ｂに第４貫通孔３４を形成し、当該第４貫通孔３４に棒状の鋼材４４を挿通するだけで、フランジ５２Ｆの両方の面側にそれぞれ設けられた第３圧接板３１，３１の回転を抑制できる。このように、容易に製造できる第３圧接板３１，３１と第３圧接板３１，３１に対する回転抑制のための簡単な施工により第３圧接板３１，３１の回転を抑制することが可能である。 In this way, the third pressure contact plates 31 and 31 on both sides of the flange 52F are interlocked with the rod-shaped steel material 44, thereby increasing the frictional force acting on each of the third pressure contact plates 31 and 31, respectively. It is possible to suppress the rotation of the third pressure contact plates 31, 31. In this case, the fourth through hole 34 is formed in the extending portions 31b and 31b provided in the third press contact plates 31 and 31, and the rod-like steel material 44 is inserted into the fourth through hole 34. It is possible to suppress the rotation of the third press contact plates 31, 31 provided on both surfaces of 52F. Thus, it is possible to suppress the rotation of the third press contact plates 31 and 31 by simple construction for suppressing the rotation of the third press contact plates 31 and 31 and the third press contact plates 31 and 31 that can be easily manufactured. .
図１１Ａは、フランジの両方の面側にそれぞれ設けられた第３圧接板同士を鋼板により互いに回転を抑制する構成を示す平面図、図１１Ｂは、図１１ＡのＦ−Ｆ矢視図である。 FIG. 11A is a plan view showing a configuration in which the third press-contact plates provided on both surface sides of the flange are each prevented from rotating by a steel plate, and FIG. 11B is a view taken along the line FF in FIG. 11A.
上記実施形態では、フランジ５２Ｆの両方の面側の第３圧接板３１，３１の第４貫通孔３４に挿通させる部材を棒状の鋼材４４としたが、これに限らず、例えば、図１１に示すように、ブレース掛け渡し方向において丸パイプ４７の両側に渡るような例えば単一の鋼板６０を挿通させても構わない。この場合には、各第３圧接板３１，３１の延出部３１ｂ，３１ｂにそれぞれブレース掛け渡し方向に長いスリット状の第４貫通孔３４を形成し、鋼板６０を挿通させる。このとき、鋼板６０が上下方向に挿通される場合には、上端部に第４貫通孔３４の幅より広い部位を形成しておくことにより、第３圧接板３１，３１に単一の鋼板６０が挿通されている状態を維持することが可能である。また、鋼板６０が水平方向に挿通される場合には、鋼板６０の上端部に第４貫通孔３４の幅より広い部位を形成しておくとともに、第３圧接板３１，３１に鋼板６０が挿通された後に、鋼板６０の他方の端に抜け止め部材を設けておくことが望ましい。例えば、たとえば鋼板６０を貫通させたボルトにナットを螺合するなどして抜けることを防止しておくことが望ましい。 In the said embodiment, although the member inserted in the 4th through-hole 34 of the 3rd press-contact board 31 of the both surfaces side of the flange 52F was made into the rod-shaped steel material 44, it is not restricted to this, For example, it shows in FIG. In this way, for example, a single steel plate 60 that extends over both sides of the round pipe 47 in the bracing direction may be inserted. In this case, slit-like fourth through holes 34 are formed in the extending portions 31b, 31b of the third press-contact plates 31, 31 in the brace extending direction, and the steel plate 60 is inserted therethrough. At this time, when the steel plate 60 is inserted in the vertical direction, a single steel plate 60 is formed on the third pressure contact plates 31 and 31 by forming a portion wider than the width of the fourth through hole 34 at the upper end portion. It is possible to maintain the state in which is inserted. When the steel plate 60 is inserted in the horizontal direction, a portion wider than the width of the fourth through hole 34 is formed at the upper end of the steel plate 60, and the steel plate 60 is inserted into the third press contact plates 31 and 31. After being done, it is desirable to provide a retaining member at the other end of the steel plate 60. For example, it is desirable to prevent the nut from being pulled out by, for example, screwing a nut into a bolt that penetrates the steel plate 60.
図１２は、ブレース掛け渡し方向と交差する方向にて隣り合う２つの第３圧接板同士により互いに回転を抑制する構成を示す平面図である。図１３は、図１２におけるＧ−Ｇ矢視図である。 FIG. 12 is a plan view showing a configuration in which rotation is mutually suppressed by two third press-contact plates that are adjacent to each other in a direction crossing the brace spanning direction. FIG. 13 is a GG arrow view in FIG.
上記実施形態においては、フランジ５２Ｆの両方の面側にそれぞれ設けられた第３圧接板３１、３１を棒状の鋼材４４や鋼板６０などの挿通部材により係合させることのみにより第３圧接板３１、３１の回転を抑制する例について説明したが、これに限るものではない。例えば、挿通部材による回転の抑制に加えて、図１２、図１３に示すように、フランジ５２Ｆのウエブ５２Ｗが設けられていない側の外面５２Ｆａにおいてブレース掛け渡し方向と直交する方向(交差方向)に並べて設けられた２つの摩擦ダンパー１０が各々１つずつ有する第３圧接板３８、３９を、一方の摩擦ダンパー１０の第３圧接板３８の延出部３８ｄと反対側に、他方の摩擦ダンパー１０の第３圧接板３９に向かって突出する凸部３８ａを設け、他方の摩擦ダンパー１０の第３圧接板３９の延出部３９ｄと反対側に、凸部３８ａが入り込む凹部３９ａを設け、凸部３８ａと凹部３９ａとを係合させて、ブレース掛け渡し方向と直交する方向に隣り合う２つの第３圧接板３８、３９同士が互いに回転を抑制し合うように構成しても良い。 In the above-described embodiment, the third press-contact plate 31, 31 provided respectively on both surface sides of the flange 52 </ b> F is engaged by the insertion member such as the rod-shaped steel material 44 or the steel plate 60, so that the third press-contact plate 31, Although the example which suppresses rotation of 31 was demonstrated, it does not restrict to this. For example, in addition to the suppression of rotation by the insertion member, as shown in FIGS. 12 and 13, the outer surface 52Fa of the flange 52F on the side where the web 52W is not provided is in a direction (crossing direction) perpendicular to the bracing direction. The third friction contact plates 38, 39 each having two friction dampers 10 arranged side by side are arranged on the opposite side of the extension portion 38 d of the third pressure contact plate 38 of one friction damper 10, and the other friction damper 10. A convex portion 38a protruding toward the third pressure contact plate 39 is provided, and a concave portion 39a into which the convex portion 38a enters is provided on the opposite side of the third pressure contact plate 39 of the other friction damper 10 to the convex portion 38a. 38a and the recessed part 39a may be engaged, and it may be comprised so that two 3rd press-contacting plates 38 and 39 adjacent to the direction orthogonal to a brace spanning direction may mutually suppress rotation.
ここで、矩形状をなす２つの第３圧接板３１が対向する辺部が互いに直線状をなす端部同士の場合（以下、直線対向型という）と、本実施形態のように一方に凸部３８ａが設けられ他方に凹部３９ａが設けられている場合（以下、凹凸型という）の回転量について比較する。 Here, when the side portions where the two third press-contact plates 31 having a rectangular shape face each other are linear ends (hereinafter referred to as a linearly opposed type), a convex portion on one side as in this embodiment A comparison will be made of the amount of rotation when 38a is provided and the recess 39a is provided on the other side (hereinafter referred to as an uneven type).
図１４は、直線対向型と凹凸型にて隣り合う２つの第３圧接板３１，３１，３８，３９が同じ隙間Ｓ３を備えて取り付けられたときの回転量を比較した図である。尚、図１４においては、直線対向型および凹凸型のそれぞれにおいても、隣り合う第３圧接板３１，３１，３８，３９のうちの左側の第３圧接板３１，３９を左材、右側の第３圧接板３１，３８を右材としている。図１４（ａ）は、隣り合う第３圧接板の目標配置状態を示す図であり、図１４（ｂ）は、左材が回転せず右材が時計回りに回転して回転が規制される位置を示す図であり、図１４（ｃ）は、左材が回転せず右材が反時計回りに回転して回転が規制される位置を示す図であり、図１４（ｄ）は、左材と右材とがいずれも反時計回りに回転して回転が規制される位置を示す図であり、図１４（ｅ）は、左材と右材とがいずれも時計回りに回転して回転が規制される位置を示す図であり、図１４（ｆ）は、左材が時計回りに回転し右材が反時計回りに回転して回転が規制される位置を示す図であり、図１４（ｇ）は、左材が反時計回りに回転し右材が時計回りに回転して回転が規制される位置を示す図である。 FIG. 14 is a diagram comparing the amount of rotation when two third press-contact plates 31, 31, 38, and 39 that are adjacent to each other in the straight-line opposed type and the concave-convex type are attached with the same gap S 3. In FIG. 14, in each of the linearly opposed type and the concavo-convex type, the left third pressure contact plate 31, 39 of the adjacent third pressure contact plates 31, 31, 38, 39 is the left material, and the right Three pressure contact plates 31 and 38 are used as the right members. FIG. 14A is a diagram showing a target arrangement state of adjacent third press-contact plates, and FIG. 14B is a diagram in which the left material does not rotate but the right material rotates clockwise and the rotation is restricted. FIG. 14C is a diagram illustrating a position where the left material does not rotate and the right material rotates counterclockwise and rotation is restricted, and FIG. FIG. 14E is a diagram showing a position where the rotation of both the material and the right material is counterclockwise and the rotation is restricted, and FIG. 14E shows the rotation of the left material and the right material both rotated clockwise. FIG. 14 (f) is a diagram showing a position where the left member rotates clockwise and the right member rotates counterclockwise, and the rotation is restricted. (G) is a figure which shows the position by which a left material rotates counterclockwise and a right material rotates clockwise, and rotation is controlled.
また、図１５Ａは、設置状態における隣り合う第３圧接板の隙間を示す図１４におけるＡ１の拡大図であり、図１５Ｂは、直線対向型の第３圧接板が同方向に回転したときの回転角度θ１を示す図である。図１６Ａは、設置状態における隣り合う第３圧接板の隙間を示す図１４におけるＢ１の拡大図であり、図１６Ｂは、凹凸型の第３圧接板が同方向に回転したときの回転角度θ２を示す図である。 15A is an enlarged view of A1 in FIG. 14 showing a gap between adjacent third press-contact plates in the installed state, and FIG. 15B is a rotation when the linearly opposed third press-contact plate rotates in the same direction. It is a figure which shows angle (theta) 1. FIG. FIG. 16A is an enlarged view of B1 in FIG. 14 showing a gap between adjacent third press contact plates in the installed state, and FIG. 16B shows a rotation angle θ2 when the concave and convex third press contact plate rotates in the same direction. FIG.
第３圧接板の回転量の比較にあっては、隣り合う２つの第３圧接板３１，３１，３８，３９が有する第３貫通孔３３，３３，３３，３３の中心間距離および左材３１，３９と右材３１，３８のサイズを等しく設定し、凹凸型の第３圧接板３８、３９は、直線対向型の右材３１を左材３１側に突出させた凸部３８ａを形成し、凸部３８ａの分だけ左材３９を切り欠いている。このとき、凹凸型の凸部３８ａと凹部３９ａ間のブレース掛け渡し方向の隙間Ｓ３およびブレース掛け渡し方向と直交する方向の隙間Ｓ３も、直線対向型の左材３１と右材３１との隙間Ｓ３と同一に設定している。 In the comparison of the rotation amount of the third press contact plate, the distance between the centers of the third through holes 33, 33, 33, 33 of the two adjacent third press contact plates 31, 31, 38, 39 and the left member 31 are used. , 39 and the right members 31, 38 are set equal in size, and the concave and convex third pressure contact plates 38, 39 form a convex portion 38a in which the linearly opposed right member 31 protrudes toward the left member 31 side, The left material 39 is notched by the amount corresponding to the convex portion 38a. At this time, the gap S3 in the brace spanning direction between the concavo-convex convex portion 38a and the concave portion 39a and the gap S3 in the direction orthogonal to the brace spanning direction are also the gap S3 between the linearly opposed left member 31 and the right member 31. Is set to be the same.
左材３１、３９および右材３１，３８のうちのいずれか一方が回転せず、他方が回転する場合を示す図１４（ｂ），図１４（ｃ）および左材３１，３９と右材３１，３８と互いに異なる方向に回転する場合を示す図１４（ｆ），図１４（ｇ）は、直線対向型であっても凹凸型であっても回転量に大きな差違はない。ところが、図１５、図１６に示すように、左材３１，３９と右材３１，３８とが同一方向に回転する場合を示す図１４（ｄ），図１４（ｅ）には、直線対向型の回転角度θ１は、凹凸型の回転角度θ２より大きくなり、左材３１と右材３１、すなわち第３圧接板３１，３１の傾きが目立ってしまう。 14 (b), 14 (c), and the left members 31, 39 and the right member 31 showing a case where any one of the left members 31, 39 and the right members 31, 38 does not rotate and the other rotates. 14 (f) and FIG. 14 (g) showing the case of rotating in directions different from each other, there is no significant difference in the amount of rotation regardless of whether it is a linearly opposed type or an uneven type. However, as shown in FIGS. 15 and 16, FIGS. 14 (d) and 14 (e) showing the case where the left members 31 and 39 and the right members 31 and 38 rotate in the same direction are linearly opposed types. Is larger than the rotation angle θ2 of the concavo-convex mold, and the inclination of the left member 31 and the right member 31, that is, the third press contact plates 31, 31, becomes conspicuous.
これは、直線対向型の場合には、左材３１と右材３１との隙間Ｓ３が、ブレース掛け渡し方向に対して直交しているので、丸パイプ４７を中心に回転する左材３１および右材３１の対向する端部３１ｄ、３１ｄが回転する軌跡が隙間Ｓ３にほぼ沿う方向となり、僅かな隙間Ｓ３であっても第３圧接板３１，３１は大きく回転することが可能である。一方、凹凸型の場合には、凸部３８ａと凹部３９ａとの隙間Ｓ３が、ブレース掛け渡し方向にも存在し、この隙間Ｓ３は丸パイプ４７を中心に回転する左材３９および右材３８の角部３８ｃ，３９ｃが回転する軌跡と交差する方向なので、丸パイプ４７を中心に回転する第３圧接板３８，３９は、角部３８ｃ，３９ｃが隙間Ｓ３の僅かな幅だけしか回転できないためである。 This is because, in the case of the straight facing type, the gap S3 between the left member 31 and the right member 31 is orthogonal to the bracing direction, so the left member 31 and the right member that rotate around the round pipe 47 The trajectory of rotation of the opposing end portions 31d and 31d of the material 31 is substantially along the gap S3, and the third press-contact plates 31 and 31 can rotate greatly even with a slight gap S3. On the other hand, in the case of the concavo-convex type, a gap S3 between the convex portion 38a and the concave portion 39a is also present in the bracing direction, and this gap S3 is formed between the left member 39 and the right member 38 that rotate around the round pipe 47. Since the corners 38c and 39c intersect with the rotation trajectory, the third pressure contact plates 38 and 39 that rotate around the round pipe 47 can rotate only a slight width of the gap S3. is there.
このため、フランジ５２Ｆの外面５２Ｆａ側にて、隣り合う２つの第３圧接板３８，３９の一方の第３圧接板３８から突出させた凸部３８ａを、他方の第３圧接板３９に設けられた凹部３９ａに入り込む構成を加えることにより、隣り合う２つの第３圧接板３８、３９の回転を更に抑制することが可能である。 For this reason, on the outer surface 52Fa side of the flange 52F, a convex portion 38a protruding from one third pressure contact plate 38 of two adjacent third pressure contact plates 38, 39 is provided on the other third pressure contact plate 39. It is possible to further suppress the rotation of the two adjacent third press-contact plates 38, 39 by adding a configuration that enters the recessed portion 39a.
＝＝＝その他の実施の形態＝＝＝
以上、本発明の実施形態について説明したが、本発明は、かかる実施形態に限定されるものではなく、その要旨を逸脱しない範囲で以下に示すような変形が可能である。
=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The deformation | transformation as shown below is possible in the range which does not deviate from the summary.
上述の実施形態では、圧接力を付与すべく第１乃至第３貫通孔１３，２３，３３を挿通して設けられる軸部材として、丸パイプ４７（パイプ部材に相当）と、同丸パイプ４７を挿通する高力ボルト４１ｂ（ボルト部材に相当）との両者を組み合わせてなる組み物を例示した。そして、この構成では、第３圧接板３１の摺動に必要な支圧力Ｆｐの第２圧接板２１から第３圧接板３１への伝達を、丸パイプ４７と第２貫通孔２３の内周面及び第３貫通孔３３の内周面との当接・係合により行っていたが、何等これに限らない。例えば、場合によっては、丸パイプ４７は無くても良く、すなわち、第１乃至第３貫通孔１３，２３，３３に、高力ボルト４１ｂのみが挿通されていても良い（例えば、図２を参照）。そして、その場合には、第３圧接板３１の摺動に必要な支圧力Ｆｐの第２圧接板２１から第３圧接板３１への伝達は、高力ボルト４１ｂと第２貫通孔２３の内周面及び第３貫通孔３３の内周面との当接・係合によって行われることになり、また、その場合には、高力ボルト４１ｂが、請求項に係る「軸部材」に相当することになる。 In the above-described embodiment, the round pipe 47 (corresponding to the pipe member) and the round pipe 47 are used as shaft members that are provided through the first to third through holes 13, 23, and 33 so as to apply a pressure contact force. The assembly which combined both with the high strength volt | bolt 41b (equivalent to a bolt member) to penetrate was illustrated. In this configuration, transmission of the supporting pressure Fp necessary for sliding the third press contact plate 31 from the second press contact plate 21 to the third press contact plate 31 is performed on the inner peripheral surfaces of the round pipe 47 and the second through hole 23. In addition, this is performed by contact / engagement with the inner peripheral surface of the third through-hole 33, but is not limited thereto. For example, in some cases, the round pipe 47 may not be provided, that is, only the high-strength bolt 41b may be inserted into the first to third through holes 13, 23, and 33 (see, for example, FIG. 2). ). In this case, the transmission of the supporting pressure Fp necessary for sliding the third pressure contact plate 31 from the second pressure contact plate 21 to the third pressure contact plate 31 is performed within the high-strength bolt 41 b and the second through hole 23. It is performed by contact and engagement with the peripheral surface and the inner peripheral surface of the third through-hole 33. In that case, the high-strength bolt 41b corresponds to the “shaft member” according to the claims. It will be.
上述の実施形態では、摩擦ダンパー１０を柱梁架構１のブレース５のフランジ５２Ｆ，５２Ｆに組み込んでいたが、柱梁架構１のブレース５以外の、例えば 間柱、間仕切り壁などに組み込んでも良い。つまり、柱梁架構１を具備する建物等の構造物の振動時に、同構造物において互いに相対移動する一対の部材であれば、それらの間に設置することができる。 In the above-described embodiment, the friction damper 10 is incorporated in the flanges 52F and 52F of the brace 5 of the column beam frame 1. However, for example, the friction damper 10 may be incorporated in a column other than the brace 5 of the column beam frame 1 or a partition wall. In other words, when a structure such as a building having the column beam frame 1 is vibrated, any pair of members that move relative to each other in the structure can be installed between them.
上述の実施形態では、第３圧接板３１、３８，３９の平面形状としてほぼ正方形及びほぼ長方形を例示したが、何等これに限らない。すなわち、四角形以外の多角形でも良いし、楕円等の円形でも良いし、更には、平面形状の外形が、直線と曲線とを組み合わせて形成された特殊形状であっても構わない。 In the above-described embodiment, a substantially square shape and a substantially rectangular shape are exemplified as the planar shapes of the third press-contact plates 31, 38, 39. However, the present invention is not limited to this. That is, it may be a polygon other than a rectangle, a circle such as an ellipse, or a planar shape may be a special shape formed by combining a straight line and a curve.
上述の実施形態では、パイプ部材の一例として鋼製の丸パイプ４７を例示したが、想定される剪断力Ｆｓに耐用し得る耐力を有し、且つ、内側に高力ボルト４１ｂ等のボルト部材を挿通可能であれば、その形状や素材は何等これに限らない。例えば、形状については、断面矩形状の角パイプを用いても良く、また、素材にあってはアルミニウム等の非鉄金属や樹脂等の非金属でも良い。 In the above-described embodiment, the steel round pipe 47 is illustrated as an example of the pipe member. However, a bolt member such as a high-strength bolt 41b is provided on the inner side and has a proof strength that can withstand the assumed shearing force Fs. As long as it can be inserted, its shape and material are not limited to this. For example, the shape may be a rectangular pipe having a rectangular cross section, and the material may be a non-ferrous metal such as aluminum or a non-metal such as resin.
上述の実施形態では、摩擦板２５，３５の素材について詳説していなかったが、ステンレス板等の滑動板１５との間で適度な摩擦力を発生するものであれば適用可能である。例えば、滑動板１５がステンレス板の場合には、摩擦板２５，３５は、熱硬化性樹脂を結合材としてアラミド繊維、ガラス繊維、ビニロン繊維、カーボンファイバー等の繊維材料と、カシューダスト、鉛などの摩擦調整材と、硫酸バリューム等の充填剤とから主に構成される摩擦材料で形成される。なお、摩擦板２５，３５には、上述の摩擦材料を単独で用いても良いし、摩擦材料に鋼板等を裏打ちして強度を高めたものを用いてもよい。 In the above-described embodiment, the material of the friction plates 25 and 35 has not been described in detail. However, any material that generates an appropriate frictional force with the sliding plate 15 such as a stainless steel plate can be applied. For example, when the sliding plate 15 is a stainless steel plate, the friction plates 25 and 35 include fiber materials such as aramid fiber, glass fiber, vinylon fiber, carbon fiber, cashew dust, lead, etc. with a thermosetting resin as a binder. And a friction material mainly composed of a friction modifier and a filler such as sulfate sulfate. As the friction plates 25 and 35, the above-described friction material may be used alone, or a friction material with a steel plate or the like lined up to increase the strength may be used.
上述の実施形態では、第１圧接板１１に滑動板１５の一例としてのステンレス板を設け、第２圧接板２１及び第３圧接板３１に摩擦板２５及び摩擦板３５を設けたが、何等これに限るものではなく、この配置関係を逆にしても良い。 In the above-described embodiment, the first pressure contact plate 11 is provided with a stainless steel plate as an example of the sliding plate 15, and the second pressure contact plate 21 and the third pressure contact plate 31 are provided with the friction plate 25 and the friction plate 35. However, the arrangement relationship may be reversed.
上述の実施形態では、図６Ｂ及び図６Ｄに示すように第３圧接板３１の片面に一枚の摩擦板３５を設け、第２圧接板２１の片面に一枚の摩擦板２５を設けていたが、何等これに限らない。すなわち、高力ボルト４１ｂ（又は丸パイプ４７）の配置位置をかわすように、第３圧接板３１に二枚等の複数枚の摩擦板３５，３５を設けるとともに、高力ボルト４１ｂ（又は丸パイプ４７）の配置位置をかわすように、第２圧接板２１に二枚等の複数枚の摩擦板２５，２５を設けても良い。 In the above-described embodiment, as shown in FIGS. 6B and 6D, one friction plate 35 is provided on one side of the third pressure contact plate 31, and one friction plate 25 is provided on one side of the second pressure contact plate 21. However, it is not limited to this. That is, a plurality of friction plates 35, 35, such as two, are provided on the third pressure contact plate 31 so as to dodge the arrangement position of the high strength bolt 41b (or round pipe 47) and the high strength bolt 41b (or round pipe). 47) A plurality of friction plates 25, 25, such as two, may be provided on the second pressure contact plate 21 so as to avoid the arrangement position of 47).
１ 柱梁架構（建物架構、構造物）、
５ ブレース、１０ 摩擦ダンパー、
１１ 第１圧接板、１１ａ 表面（一方の面）、
１３ 第１貫通孔、１５ 滑動板、
２１ 第２圧接板、２３ 第２貫通孔、２５ 摩擦板、
３１ 第３圧接板、３１ａ 二辺、３１ｂ 延出部、３１ｄ 端部、
３３ 第３貫通孔、３４ 第４貫通孔、３５ 摩擦板、
３８ 第３圧接板（右材）、３８ａ 凸部、３８ｃ 角部、３８ｄ 延出部、
３９ 第３圧接板（左材）、３９ａ 凹部、３９ｃ 角部、３９ｄ 延出部、
４１ｂ 高力ボルト（ボルト部材）、４１ｎ ナット、４４ 棒状の鋼材、
４４ａ 太い部位、４５ 薄板、４５ａ 孔部、
４７ 丸パイプ（パイプ部材）、５０ フィラープレート、
５１ 一方のブレース分断片、５１Ｗ ウエブ、５１Ｆ フランジ、
５２ 他方のブレース分断片、５２Ｗ ウエブ、５２Ｆ フランジ、
５２Ｆａ 外面、６０ 鋼板、
１１０摩擦ダンパー、
Ｆｆ 摩擦力、Ｆｐ 支圧力、Ｆｓ 剪断力、Ｐ 外力、
Ｓ１ 間隔、Ｃ３１ 中心軸
1 column beam frame (building frame, structure),
5 braces, 10 friction dampers,
11 first pressure contact plate, 11a surface (one surface),
13 first through hole, 15 sliding plate,
21 second pressure contact plate, 23 second through hole, 25 friction plate,
31 3rd press-contact plate, 31a Two sides, 31b Extension part, 31d End part,
33 third through hole, 34 fourth through hole, 35 friction plate,
38 third pressure contact plate (right material), 38a convex part, 38c corner part, 38d extension part,
39 third pressure contact plate (left material), 39a recess, 39c corner, 39d extension,
41b high-strength bolt (bolt member), 41n nut, 44 bar steel,
44a thick part, 45 thin plate, 45a hole,
47 Round pipe (pipe member), 50 filler plate,
51 One brace piece, 51W web, 51F flange,
52 other brace piece, 52W web, 52F flange,
52Fa outer surface, 60 steel plate,
110 friction damper,
Ff frictional force, Fp support pressure, Fs shearing force, P external force,
S1 interval, C31 central axis
Claims (4)
前記一対の部材のうちの一方の部材に設けられ対面する２つの第１圧接板と、
前記一対の部材のうちの他方の部材に設けられ前記２つの第１圧接板の間に介在される第２圧接板と、
前記第２圧接板の両方の面側にそれぞれ設けられ、前記第２圧接板とともに前記第１圧接板を両面から所定の圧接力で挟み込む２つの第３圧接板と、
前記圧接力を付与すべく、前記第１圧接板の前記所定方向に長い第１貫通孔、前記第２圧接板の第２貫通孔、及び前記第３圧接板の第３貫通孔を挿通して設けられる軸部材と、を有し、
前記第１貫通孔によって前記第１圧接板に対する前記第２圧接板の前記所定方向の摺動が許容されるとともに、前記摺動に伴って前記第３圧接板が前記第１圧接板に対して前記所定方向に摺動するように、当該摺動させるための力が、前記軸部材の前記第２貫通孔及び前記第３貫通孔との係合を介して前記第２圧接板から前記第３圧接板へと伝達され、
各々の前記第３圧接板は、前記所定方向と交差する方向に前記第１圧接板及び前記第２圧接板より突出するように延出された延出部と、当該延出部に第４貫通孔を備え、
前記第２圧接板の両方の面側に各々設けられた前記第３圧接板の前記第４貫通孔に単一の挿通部材が挿通されて、前記第２圧接板の両方の面側に設けられた前記第３圧接板の回転が抑制されることを特徴とする摩擦ダンパー。 A friction damper that is disposed between a pair of members that move relative to each other in a predetermined direction in the structure, and that suppresses the relative movement by the frictional force between the pressure plates that slide with the relative movement,
Two first press-contact plates provided on one member of the pair of members and facing each other;
A second pressure contact plate provided on the other member of the pair of members and interposed between the two first pressure contact plates;
Two third pressure plates that are provided on both sides of the second pressure plate and sandwich the first pressure plate together with the second pressure plate from both sides with a predetermined pressure force; and
In order to apply the pressure contact force, the first pressure contact plate is inserted through the first through hole long in the predetermined direction, the second pressure contact plate second through hole, and the third pressure contact plate third through hole. A shaft member provided,
The first through hole allows the second pressure contact plate to slide in the predetermined direction relative to the first pressure contact plate, and the third pressure contact plate moves relative to the first pressure contact plate along with the sliding. In order to slide in the predetermined direction, the sliding force is applied from the second pressure contact plate to the third through the engagement of the shaft member with the second through hole and the third through hole. Transmitted to the pressure plate,
Each of the third pressure-contact plates extends in a direction intersecting the predetermined direction so as to protrude from the first pressure-contact plate and the second pressure-contact plate, and the extension portion has a fourth penetration. With holes,
A single insertion member is inserted into the fourth through hole of the third press contact plate provided on each of both surfaces of the second press contact plate, and provided on both surfaces of the second press contact plate. Further, the friction damper is characterized in that the rotation of the third pressure contact plate is suppressed.
前記第４貫通孔は、前記所定方向において前記軸部材の両側に設けられた丸孔であり、
前記挿通部材は、棒状の部材であることを特徴とする摩擦ダンパー。 The friction damper according to claim 1,
The fourth through hole is a round hole provided on both sides of the shaft member in the predetermined direction,
The friction damper, wherein the insertion member is a rod-shaped member.
前記第４貫通孔は、前記所定方向に長い長孔であり、前記所定方向において前記軸部材の両側に渡るように設けられており、
前記挿通部材は、板状の部材であることを特徴とする摩擦ダンパー。 The friction damper according to claim 1,
The fourth through hole is a long hole that is long in the predetermined direction, and is provided so as to cross over both sides of the shaft member in the predetermined direction.
The friction damper, wherein the insertion member is a plate-like member.
前記挿通部材は、前記一対の部材、前記第１圧接板、前記第２圧接板のうちのいずれかに近接させて挿通されていることを特徴とする摩擦ダンパー。 A friction damper according to any one of claims 1 to 3,
The friction damper, wherein the insertion member is inserted in proximity to any one of the pair of members, the first pressure contact plate, and the second pressure contact plate.
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| JP2014076443A JP6354270B2 (en) | 2014-04-02 | 2014-04-02 | Friction damper |
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| JP5987505B2 (en) * | 2012-07-03 | 2016-09-07 | 株式会社大林組 | Vibration control structure |
| JP6354269B2 (en) * | 2014-04-02 | 2018-07-11 | 株式会社大林組 | Friction damper |
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