JP5943474B2

JP5943474B2 - Magnetic damper device

Info

Publication number: JP5943474B2
Application number: JP2012168054A
Authority: JP
Inventors: 純二水田; 引田　直人; 直人引田; 俊介渡邊; 柴田　和彦; 和彦柴田; 直文五十幡
Original assignee: Hitachi GE Nuclear Energy Ltd; Sanwa Tekki Corp
Current assignee: Hitachi GE Nuclear Energy Ltd; Sanwa Tekki Corp
Priority date: 2012-07-30
Filing date: 2012-07-30
Publication date: 2016-07-05
Anticipated expiration: 2032-07-30
Also published as: JP2014025561A

Description

この発明は、例えば、沸騰水型原子炉のインターナルポンプシステム等に適用するのに好適な磁気ダンパ装置に関する。 The present invention relates to a magnetic damper device suitable for application to, for example, an internal pump system of a boiling water reactor.

改良沸騰水型原子炉は、原子炉圧力容器の底部に複数のインターナルポンプを備えている。これらのインターナルポンプは、原子炉の運転中に回転速度を変えることによって原子炉出力を制御する。インターナルポンプは、原子炉の起動時、原子炉の運転停止時、及びこれら以外の運転時に、共振周波数での運転を経験する。このため、回転速度の増加または減少に伴ってインターナルポンプの回転周波数とポンプケーシングの固有振動数が接近する際、この共振による振動を抑制するインターナルポンプ用制振装置として、磁気ダンパが提案されている（特許文献１参照）。 The improved boiling water reactor includes a plurality of internal pumps at the bottom of the reactor pressure vessel. These internal pumps control the reactor power by changing the rotational speed during operation of the reactor. The internal pump experiences operation at a resonant frequency when the reactor is started, when the reactor is shut down, and during other operations. For this reason, a magnetic damper is proposed as an internal pump damping device that suppresses vibration due to resonance when the rotational frequency of the internal pump approaches the natural frequency of the pump casing as the rotational speed increases or decreases. (See Patent Document 1).

特許文献２には、板ばね振動型磁気ダンパが記載されている。この板ばね振動型磁気ダンパは、支持杆の周囲に４つの吸振要素を設けている。各吸振要素は、支持杆のフランジ支持天板に取り付けられた固定片、一対の板ばね、慣性部材、及び一対の磁石板を有する。対向する一対の板ばねの上端部を固定片に取り付け、対向する一対の板ばねの下端部を慣性部材に取り付けている。一対の磁石板が向き合って慣性部材に設けられる。一対の磁石板の間に配置された導体板が、支持杆の固定板に設けられている。吸振要素の固有振動数は板ばねの長さを変更することによって調節される。また、板ばねの長さの変更は、固定片の支持杆に対する固定位置を変更することによって行われる。 Patent Document 2 describes a leaf spring vibration type magnetic damper. This leaf spring vibration type magnetic damper is provided with four vibration absorbing elements around the support rod. Each vibration absorbing element has a fixed piece attached to the flange support top plate of the support rod, a pair of leaf springs, an inertia member, and a pair of magnet plates. The upper ends of the opposing pair of leaf springs are attached to the fixed piece, and the lower ends of the opposing pair of leaf springs are attached to the inertia member. A pair of magnet plates face each other and are provided on the inertia member. A conductor plate disposed between the pair of magnet plates is provided on the fixed plate of the support rod. The natural frequency of the vibration absorbing element is adjusted by changing the length of the leaf spring. Moreover, the change of the length of a leaf | plate spring is performed by changing the fixing position with respect to the support rod of a fixing piece.

特開平６−２４１２７４号公報JP-A-6-241274 特開平９−１１２６３１号公報Japanese Patent Laid-Open No. 9-112231

しかしながら、特許文献１には、吸振要素の固有振動数を制振対象の固有振動数に対応させる具体的手段についての記載はない。特許文献２に記載された板ばね振動型磁気ダンパでは、板ばねの上端部がボルト及びナットによって固定片に取り付けられ、板ばねの下端部もボルト及びナットによって固定板に取り付けられている。このため、その板ばね振動型磁気ダンパでの板ばねのばね定数の変更は、ボルト及びナットを取り外して板ばねを固定片及び固定板から取り外し、磁気ダンパの固有振動数を制振対象の固有振動数と同調させる長さの板ばねを、再度、固定片及び固定板に取り付ける必要がある。その際には、固定片と固定板の間の長さを、新たな板ばねが固定片及び固定板に取り付けられるように、固定片の支持杆に対する固定位置を変更する。このような板ばねの長さを変更する作業は、設置現場において正確、簡易迅速に行うことができない。
したがって、本発明の目的は、制振対象物に適合するように、設置現場において、容易、かつ正確に、また構成各部の歪みなく、固有振動数を調節できる磁気ダンパ装置を提供することである。 However, Patent Document 1 does not describe specific means for causing the natural frequency of the damping element to correspond to the natural frequency of the vibration suppression target. In the leaf spring vibration type magnetic damper described in Patent Document 2, the upper end portion of the leaf spring is attached to the fixed piece by a bolt and a nut, and the lower end portion of the leaf spring is also attached to the fixed plate by the bolt and the nut. For this reason, changing the spring constant of the leaf spring with the leaf spring vibration type magnetic damper removes the bolt and nut, removes the leaf spring from the fixed piece and the stationary plate, and sets the natural frequency of the magnetic damper to the characteristic of the damping target. It is necessary to attach a leaf spring having a length synchronized with the frequency to the fixing piece and the fixing plate again. In that case, the fixing position of the fixing piece with respect to the support rod is changed so that a new leaf spring can be attached to the fixing piece and the fixing plate. Such an operation of changing the length of the leaf spring cannot be performed accurately, simply and quickly at the installation site.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a magnetic damper device capable of adjusting the natural frequency easily and accurately at the installation site and without distortion of each component so as to be adapted to the object to be damped. .

以下、添付図面の符号を参照して説明するが、本発明はこれに限定されるものではない。
上記課題を解決するための、この出願に係る発明の磁気ダンパ装置１は、制振対象４１に固着される支持部材２と、この支持部材２に上端が取り付けられ下方の自由端に向かって上下方向に延びる板ばね部材３と、それの自由端に取り付けられた慣性部材４と、それに向き合って配置されて支持部材２に取り付けられた導体板５と、それの第１面及び慣性部材４の、第１面と向き合っている第２面のいずれかに設けられた磁石６と、板ばね部材３の上下方向に移動可能に支持部材２に支持されたロック手段７と、それを板ばね部材３の上下方向に移動させる移動手段８とを備える。支持部材２は、上下に相互間隔を置いて水平に配置された上部支持板１０と、下部支持板１１とを備える。板ばね部材３は、左右の一対が、上端において上部支持板１０に互いに平行に固定される。慣性部材４は、板ばね部材３の下端に固定され、板ばねの板面と直角方向で下方に開いた複数の互いに平行なスリット１２を備える。導体板５は、慣性部材４の各スリット１２に挿入されるように複数設けられ、下端において下部支持板１１上に固定される。ロック手段７は、板ばね部材３をその厚さ方向に挟む内側及び外側各一対のロック板１３，１４と、左右二対のロック板の前後両端部間を締め付け解放可能に水平に貫通するロックボルト１５及びナット１６とを具備する。移動手段８は、上端が上部支持板１０に固定された支持フレーム１７と、この支持フレーム１７内に上下方向に摺動自在に設けられた移動ブロック１８と、この移動ブロック１８のナット２５を貫通して支持フレーム１７に垂直に支持されたねじ棒１９とを具備する。支持フレーム１７は、一対の板ばね部材３の内側に、それらと平行に間隔を置いて配置される左右一対の垂直支持板２０と、これら垂直支持板２０の下端間を結合する水平支持板２１とを備える。垂直支持板２０は、上端において上部支持板１０の下面に固定され、ロックボルト１５を水平に貫通させる上下方向の長孔２２を前後に一対有する。移動ブロック１８は、一対の垂直支持板２０の対向内側面に当接するように当該垂直支持板２０間に上下方向に摺動自在に設けられ、ロックボルト１５を水平に貫通させる。ねじ棒１９は、上下端部において上部支持板１０と水平支持板２１に回転自在に支持され、中間において移動ブロック１８のナット２５に螺合され、上部支持板１０から突出した上端に回転操作用のハンドル２６を備える。 Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
In order to solve the above problems, a magnetic damper device 1 of the invention according to this application includes a support member 2 fixed to a vibration suppression target 41, and an upper end attached to the support member 2 so as to move up and down toward a free end below. Of the leaf spring member 3 extending in the direction, the inertia member 4 attached to the free end thereof, the conductor plate 5 arranged facing the support member 2 and attached to the support member 2, the first surface thereof, and the inertia member 4 The magnet 6 provided on one of the second surfaces facing the first surface, the locking means 7 supported by the support member 2 so as to be movable in the vertical direction of the leaf spring member 3, and the leaf spring member 3 and a moving means 8 for moving in the vertical direction. The support member 2 includes an upper support plate 10 and a lower support plate 11 that are horizontally arranged with a space therebetween in the vertical direction. A pair of left and right leaf spring members 3 are fixed to the upper support plate 10 in parallel with each other at the upper end. The inertia member 4 is fixed to the lower end of the leaf spring member 3 and includes a plurality of parallel slits 12 opened downward in a direction perpendicular to the plate surface of the leaf spring. A plurality of conductor plates 5 are provided so as to be inserted into the respective slits 12 of the inertia member 4, and are fixed on the lower support plate 11 at the lower ends. The lock means 7 is a lock that penetrates horizontally between the pair of inner and outer lock plates 13 and 14 sandwiching the leaf spring member 3 in its thickness direction and between the front and rear ends of the two pairs of left and right lock plates so as to be able to be tightened and released. A bolt 15 and a nut 16 are provided. The moving means 8 penetrates through a support frame 17 whose upper end is fixed to the upper support plate 10, a moving block 18 slidably provided in the support frame 17, and a nut 25 of the moving block 18. And a screw rod 19 vertically supported by the support frame 17. The support frame 17 includes a pair of left and right vertical support plates 20 disposed at intervals inside and parallel to the pair of leaf spring members 3, and a horizontal support plate 21 that couples the lower ends of the vertical support plates 20. With. The vertical support plate 20 is fixed to the lower surface of the upper support plate 10 at the upper end, and has a pair of upper and lower elongated holes 22 through which the lock bolts 15 penetrate horizontally. The moving block 18 is provided between the vertical support plates 20 so as to be slidable in the vertical direction so as to come into contact with the opposing inner side surfaces of the pair of vertical support plates 20, and allows the lock bolts 15 to penetrate horizontally. The screw rod 19 is rotatably supported by the upper support plate 10 and the horizontal support plate 21 at the upper and lower ends, and is screwed into the nut 25 of the moving block 18 in the middle, and is rotated at the upper end protruding from the upper support plate 10. The handle 26 is provided.

この出願に係る発明のダンパ装置によれば、制振対象物に適合するように、設置現場において、容易、かつ正確に、また構成各部の歪みなく、固有振動数を微調整でき、それにより効果的に制振作用を行うことができる。 According to the damper device of the invention related to this application, the natural frequency can be finely adjusted easily and accurately at the installation site and without distortion of each component so as to match the object to be damped. Therefore, the vibration damping action can be performed.

本発明に係るダンパ装置の正面図である。It is a front view of the damper device concerning the present invention. 図１のダンパ装置の側面図である。It is a side view of the damper apparatus of FIG. 図１におけるＩＩＩ−ＩＩＩ断面図である。It is III-III sectional drawing in FIG. 図１のダンパ装置の斜視図である。It is a perspective view of the damper apparatus of FIG.

図面を参照してこの発明の実施の形態を説明する。
磁気ダンパ装置１は、制振対象４１に固着される支持部材２と、この支持部材２に上端が取り付けられ、下方の自由端に向かって上下方向に延びる板ばね部材３と、この板ばね部材３の自由端に取り付けられた慣性部材４と、この慣性部材４に向き合って配置されて支持部材２に取り付けられた導体板５と、この導体板５の第１面及び慣性部材４の、第１面と向き合っている第２面のいずれかに設けられた磁石６と、板ばね部材３の上下方向に移動可能に支持部材２に支持されたロック手段７と、このロック手段７を板ばね部材３の上下方向に移動させる移動手段８とを備える。 Embodiments of the present invention will be described with reference to the drawings.
The magnetic damper device 1 includes a support member 2 fixed to a vibration suppression target 41, a leaf spring member 3 having an upper end attached to the support member 2 and extending in a vertical direction toward a lower free end, and the leaf spring member. 3, an inertia member 4 attached to the free end 3, a conductor plate 5 which is disposed facing the inertia member 4 and attached to the support member 2, and the first surface of the conductor plate 5 and the inertia member 4 A magnet 6 provided on any one of the second surfaces facing the one surface, a lock means 7 supported by the support member 2 so as to be movable in the vertical direction of the leaf spring member 3, and the lock means 7 as a leaf spring. And a moving means 8 for moving the member 3 in the vertical direction.

支持部材２は、垂直に配置される本体９と、本体に上下に相互間隔を置いて水平に配置される上部支持板１０と、下部支持板１１とを備える。上部支持板１０と下部支持板１１は、矩形で、それぞれ後方端において本体９に固着される。板ばね部材３が、上部支持板１０に支持され、また導体板５が、下部支持板１１に支持される。 The support member 2 includes a main body 9 that is disposed vertically, an upper support plate 10 that is disposed horizontally on the main body and spaced apart from each other, and a lower support plate 11. The upper support plate 10 and the lower support plate 11 are rectangular and are fixed to the main body 9 at the rear ends. The leaf spring member 3 is supported by the upper support plate 10, and the conductor plate 5 is supported by the lower support plate 11.

一対の板ばね部材３は、それぞれ２枚の平板ばねを重ね合わせてなり、上端において上部支持板１０の左右の側面に、互いに平行に固定される。 The pair of leaf spring members 3 are each formed by overlapping two flat springs, and are fixed in parallel to each other on the left and right side surfaces of the upper support plate 10 at the upper end.

慣性部材４は、一対の板ばね部材３の下端部に固定される。慣性部材４は、板ばね部材３の板面と直角方向（振動方法）で、下端側に開放する複数のスリット１２を有する。各スリット１２は、互いに前後方向に平行に配置される。このスリット１２の対向する内側面に磁石６が固着される。図示の実施例において、慣性部材４は、板ばね部材３の下端部間に左右水平方向のボルト２７で固定される上部材２８と、これに垂直方向のボルト２９で固着される下部材３０とで構成される。さらに、下部材３０は、前後方向に分割された複数の構成体３１の上端部を前後方向水平の結合ボルト３２で一体化して構成される。 The inertia member 4 is fixed to the lower ends of the pair of leaf spring members 3. The inertia member 4 has a plurality of slits 12 opened to the lower end side in a direction perpendicular to the plate surface of the leaf spring member 3 (vibration method). Each slit 12 is arrange | positioned mutually parallel in the front-back direction. The magnet 6 is fixed to the opposing inner surface of the slit 12. In the illustrated embodiment, the inertia member 4 includes an upper member 28 fixed by a left-right horizontal bolt 27 between lower ends of the leaf spring member 3, and a lower member 30 fixed thereto by a vertical bolt 29. Consists of. Further, the lower member 30 is configured by integrating upper end portions of a plurality of constituent bodies 31 divided in the front-rear direction with horizontal coupling bolts 32 in the front-rear direction.

導体板５は、慣性部材４の各スリット１２に挿入されるように、互いに平行に並んで複数設けられ、下端において下部支持板１１上に固定される。スリット１２内において、導体板５の表裏面に磁石６が対向して配置される。 A plurality of conductor plates 5 are provided in parallel to each other so as to be inserted into each slit 12 of the inertia member 4, and are fixed on the lower support plate 11 at the lower ends. In the slit 12, the magnet 6 is disposed opposite to the front and back surfaces of the conductor plate 5.

ロック手段７は、ロック板１３，１４と、ロックボルト１５及びナット１６とを具備する。外側及び内側のロック板１３，１４は、各板ばね部材３をその厚さ方向に挟む。ロックボルト１５は、ロック板１３，１４の前後方向の両端部間を水平に貫通し、ロックナット１６の調整により、両ロック板１３，１４間を締め付け解放可能である。 The lock means 7 includes lock plates 13 and 14, a lock bolt 15 and a nut 16. The outer and inner lock plates 13 and 14 sandwich each leaf spring member 3 in the thickness direction. The lock bolt 15 penetrates horizontally between both ends of the lock plates 13 and 14 in the front-rear direction, and can be tightened and released between the lock plates 13 and 14 by adjusting the lock nut 16.

移動手段８は、支持フレーム１７と、支持フレーム１７内の移動ブロック１８と、移動ブロック１８を貫通するねじ棒１９とを具備する。 The moving means 8 includes a support frame 17, a moving block 18 in the support frame 17, and a screw rod 19 that passes through the moving block 18.

支持フレーム１７は、一対の板ばね部材３の内側に、それらと平行に間隔を置いて配置される左右一対の垂直支持板２０と、これら垂直支持板２０の下端間を結合する水平支持板２１とを備える。垂直支持板２０は、上端において上部支持板１０の下面に固定され、ロックボルト１５を水平に貫通させる上下方向の長孔２２を前後に一対有する。 The support frame 17 includes a pair of left and right vertical support plates 20 disposed at intervals inside and parallel to the pair of leaf spring members 3, and a horizontal support plate 21 that couples the lower ends of the vertical support plates 20. With. The vertical support plate 20 is fixed to the lower surface of the upper support plate 10 at the upper end, and has a pair of upper and lower elongated holes 22 through which the lock bolts 15 penetrate horizontally.

移動ブロック１８は直方体状で、左右側面が支持フレーム１７の垂直支持板２０の内側面に接して、上下方向に摺動自在に設けられる。移動ブロック１８は、前後端部付近に、ロックボルト１５を貫通させる左右水平方向の挿通孔２３を有し、また中央に、ねじ棒１９を垂直に貫通させる貫通孔２４を有する。この貫通孔２４には、ねじ棒１９と螺合するナット２５が設けられる。ねじ棒１９、ナット２５には、台形ねじが刻まれている。挿通孔２３と貫通孔２４の間に、垂直に貫通するガイド孔３５が設けられ、これにガイドコラム３６が摺動自在に貫通する。ガイドコラム３６は、上下端において上部支持板１０と水平支持板２１に支持される。 The moving block 18 has a rectangular parallelepiped shape, and the left and right side surfaces are in contact with the inner side surface of the vertical support plate 20 of the support frame 17 so as to be slidable in the vertical direction. The moving block 18 has a horizontal horizontal insertion hole 23 through which the lock bolt 15 passes in the vicinity of the front and rear ends, and a through hole 24 through which the screw rod 19 passes vertically at the center. The through-hole 24 is provided with a nut 25 that is screwed with the screw rod 19. A trapezoidal screw is engraved on the screw rod 19 and the nut 25. A guide hole 35 penetrating vertically is provided between the insertion hole 23 and the through hole 24, and the guide column 36 penetrates slidably therethrough. The guide column 36 is supported by the upper support plate 10 and the horizontal support plate 21 at the upper and lower ends.

ねじ棒１９は、移動ブロック１８を貫通し、上下端部において上部支持板１０と水平支持板２１に回転自在に支持される。上部支持板１０から突出した上端には、回転操作用のハンドル２６が取り付けられる。 The screw rod 19 penetrates the moving block 18 and is rotatably supported by the upper support plate 10 and the horizontal support plate 21 at the upper and lower ends. A handle 26 for rotating operation is attached to the upper end protruding from the upper support plate 10.

内側ロック板１３は、支持フレーム１７の垂直支持板２０の外側面に当接するように設けられ、その前端面に、ロックボルト１５の中心位置を示す目印板３３が固定され、垂直支持板２０の前面には、目印板３３に対応して上下相対位置を示す目盛板３４が固定される。 The inner lock plate 13 is provided so as to contact the outer surface of the vertical support plate 20 of the support frame 17, and a mark plate 33 indicating the center position of the lock bolt 15 is fixed to the front end surface thereof. A scale plate 34 indicating the relative position in the vertical direction corresponding to the mark plate 33 is fixed to the front surface.

このダンパ装置のマスの振動数を制振対象の振動数に同調させるために、板ばね部材３の長さを変えて、ばね定数を調整する。そのために、ロックボルト、ナット１５，１６を弛めて、ロック板１３，１４から板ばね部材３を解放した状態で、ハンドル２６によってねじ棒１９を回転させる。これにより、移動ブロック１８と共に、ロックボルト、ナット１５，１６、ロック板１３，１４が昇降する。それの相対位置は、目印板３３と目盛板３４との照合で容易に確認できる。これにより、板ばね固定部材３−マス４間の、板ばねの長さ（ばね定数）が変化し、同調振動数、すなわち、マスの固有振動数が変化する。 In order to synchronize the frequency of the mass of this damper device with the frequency of the object to be controlled, the length of the leaf spring member 3 is changed to adjust the spring constant. For this purpose, the screw rod 19 is rotated by the handle 26 in a state where the lock bolts and nuts 15 and 16 are loosened and the leaf spring member 3 is released from the lock plates 13 and 14. Thereby, together with the moving block 18, the lock bolts, nuts 15 and 16, and the lock plates 13 and 14 are moved up and down. The relative position can be easily confirmed by comparing the mark plate 33 and the scale plate 34. Thereby, the length (spring constant) of the leaf spring between the leaf spring fixing member 3 and the mass 4 changes, and the tuning frequency, that is, the natural frequency of the mass changes.

ねじ棒１９の台形ねじを利用することで、板ばね部材３の固定部を決定するロック手段７、すなわち、ロック板１３，１４，移動ブロック１８を移動させる力が増幅し、同調振動数の調整が容易になり、微調整も可能になる。手を使わずに板ばね固定部を支えることができ、板ばね部材３を固定するときに固定部が動かない。ロック板１３，１４，移動ブロック１８が、台形ねじでガイドされ、移動中に傾くことがないため、固定時の微調整が不要になり、短時間で作業を完了できる。 By utilizing the trapezoidal screw of the threaded rod 19, the force for moving the lock means 7, that is, the lock plates 13, 14 and the moving block 18, for determining the fixed portion of the leaf spring member 3, is amplified, and the tuning frequency is adjusted. Becomes easy and fine adjustment is possible. The leaf spring fixing portion can be supported without using a hand, and the fixing portion does not move when the leaf spring member 3 is fixed. Since the lock plates 13 and 14 and the moving block 18 are guided by trapezoidal screws and do not tilt during the movement, fine adjustment at the time of fixing becomes unnecessary, and the work can be completed in a short time.

１磁気ダンパ装置
２支持部材
３板ばね部材
４慣性部材
５導体板
６磁石
７ロック手段
８移動手段
９支持部材の本体
１０上部支持板
１１下部支持板
１２スリット
１３ロック板
１４ロック板
１５ロックボルト
１６ロックナット
１７支持フレーム
１８移動ブロック
１９ねじ棒
２０垂直支持板
２１水平支持板
２２長孔
２３挿通孔
２４貫通孔
２５ナット
２６ハンドル
２７ボルト
２８上部材
２９ボルト
３０下部材
３１構成体
３２結合ボルト
３３目印板
３４目盛板
３５ガイド孔
３６ガイドコラム
４１制振対象 DESCRIPTION OF SYMBOLS 1 Magnetic damper apparatus 2 Support member 3 Leaf spring member 4 Inertial member 5 Conductor plate 6 Magnet 7 Lock means 8 Moving means 9 Support member main body 10 Upper support plate 11 Lower support plate 12 Slit 13 Lock plate 14 Lock plate 15 Lock bolt 16 Lock nut 17 Support frame 18 Moving block 19 Screw rod 20 Vertical support plate 21 Horizontal support plate 22 Long hole 23 Insertion hole 24 Through hole 25 Nut 26 Handle 27 Bolt 28 Upper member 29 Bolt 30 Lower member 31 Constituent body 32 Coupling bolt 33 Mark Plate 34 Scale plate 35 Guide hole 36 Guide column 41 Damping target

Claims

A support member fixed to the object to be damped; a leaf spring member having a fixed end attached to the support member and extending in the vertical direction toward the lower free end; and an inertia member attached to the free end of the leaf spring member; The up and down position can be changed to the conductor plate disposed facing the inertia member and attached to the support member, the magnet provided on the surface of the inertia member facing the conductor plate , and the leaf spring member and locking means that will be fixed to, and a moving means for moving the locking means in the vertical direction of the plate spring member,
The support member includes an upper support plate and a lower support plate that are horizontally arranged with a space therebetween in the vertical direction,
The leaf spring member is composed of a pair of left and right fixed at the upper end to the upper support plate in parallel to each other,
The inertia member is fixed to a lower end of the leaf spring member, and includes a plurality of parallel slits opened downward in a direction perpendicular to the plate surface of the leaf spring,
The conductor plate is provided in a plurality so as to be inserted into each slit of the inertia member, and is fixed on the lower support plate at the lower end,
The magnet is provided on at least one of the two surfaces of the inertia member facing the two surfaces of the conductor plate;
The locking means includes a pair of inner and outer locking plates that sandwich the leaf spring member in its thickness direction,
It has a lock bolt and a nut that penetrate horizontally between the front and rear ends of the two pairs of left and right lock plates so that they can be released.
The moving means includes a support frame having an upper end fixed to the upper support plate, a moving block provided in the support frame so as to be slidable in the vertical direction, and a nut through the moving block. A vertically supported threaded rod;
The support frame is disposed on the inner side of the pair of leaf spring members and spaced apart from each other, and is fixed to the lower surface of the upper support plate at the upper end, and is a vertically elongated slot that horizontally penetrates the lock bolt. A pair of left and right vertical support plates having a pair of front and rear, and a horizontal support plate that joins between the lower ends of these vertical support plates,
The moving block is provided between the vertical support plates so as to be slidable in the vertical direction so as to come into contact with the opposed inner side surfaces of the pair of vertical support plates, and horizontally penetrates the lock bolt,
The screw rod is rotatably supported by the upper support plate and the horizontal support plate at upper and lower ends, and is screwed into the nut of the moving block in the middle, and a handle for rotation operation at the upper end protruding from the upper support plate A magnetic damper device comprising:

The inner lock plate is provided so as to contact the outer surface of the vertical support plate of the support frame, and a mark plate indicating the center position of the lock bolt is fixed to the front end surface of the lock plate, The magnetic damper device according to claim 1, wherein a scale plate indicating a vertical relative position is fixed to the front surface corresponding to the mark plate.

The magnetic damper device according to claim 1, wherein the magnet is fixed to an inner surface of each slit of the inertia member so as to face an outer surface of the conductor plate.