JP4386058B2 - Uniaxial vibration damping unit - Google Patents

Description

  The present invention relates to a unitization technique of a uniaxial vibration damping device that is interposed between a supporting structure and a supported structure and attenuates the relative vibrations of the both.

  Important facilities such as nuclear power plants were designed to withstand earthquakes, etc., but they aimed to reduce costs through site-free and standardization of equipment aimed at expanding the location where the important facilities could be constructed regardless of location conditions. Adoption of seismic isolation structure that enables standardized plant construction is desired.

  Generally, horizontal seismic isolation structure using laminated rubber is adopted for the seismic isolation of buildings such as buildings, but by using this together with the vertical seismic isolation structure, 3D seismic isolation is achieved and the building from the earthquake Can be efficiently protected, and by applying this to the important facility, it is possible to standardize the building and the important equipment contained therein. As such a three-dimensional seismic isolation device, a structure as shown in FIG. 12 is suggested in, for example, Japanese Patent Application Laid-Open No. 11-30278.

  That is, the building housing 6 as the lower structure is supported on the support base 2 via the horizontal seismic isolation device 4 including the laminated rubber 4a and the horizontal damper 4b, and the floor surface of the horizontally isolated building housing 6 is supported. A uniaxial vibration absorption is performed between the vibration isolation floor 10 and the floor surface 6a of the building frame 6 in the vertical direction by arranging a vibration isolation floor 10 as an upper structure at an appropriate interval above 6a. The apparatus 12 has a structure in which a large number of apparatuses 12 are interposed at appropriate positions. As the uniaxial vibration absorbing apparatus 12 for vertical vibration isolation, an uniaxial vibration in the vertical direction of the vibration isolation floor 10 using an elastic body such as a coil spring or a disc spring is used. Generally, a uniaxial displacement absorbing mechanism 14 that absorbs and a vibration damping mechanism 16 that absorbs and attenuates vibration energy in the uniaxial direction above and below the uniaxial displacement absorbing mechanism 14 are installed.

The displacement absorbing mechanism 14 includes an upper mounting plate 18 fixed to the lower surface of the isolation floor 10, a lower mounting plate 20 fixed to the floor surface 6 a of the building frame 6, and both the mounting plates 10, 20. And a center guide 22 which is slidably fitted to each other and expands and contracts, and an elastic body 24 such as a coil spring or a disc spring provided on the outer periphery of the center guide 22. The vibration damping mechanism 16 is composed of a hydraulic damper, a friction damper, or the like, and is provided by connecting the vibration-isolating floor 10 and the side wall 6b of the building housing 6 or is provided in parallel with the displacement absorbing mechanism 14 to provide the vibration-isolating floor 10. And the floor surface 6a of the building housing 6 are connected to each other.
Japanese Patent Laid-Open No. 11-30278

  However, in the conventional uniaxial vibration damping mechanism 16 used for vertical vibration isolation, a large number of uniaxial displacement absorbing mechanisms 14 are fixed between the lower surface of the vibration isolation floor 10 and the floor surface 6a of the building frame 6. In addition, in order to install the vibration damping mechanism 16, it is necessary to secure the work space because a person enters the space between the vibration-isolating floor 10 and the building frame 6 to perform the installation work. There was a limit to setting the height of the isolation floor 10 low. Further, since the work is performed in a narrow space, installation of a large number of the uniaxial displacement absorbing mechanism 14 and the vibration damping mechanism 16 requires a great amount of labor, and there is only a difficulty in terms of workability. In addition, there was a difficulty in the maintenance workability performed regularly.

  Further, when the uniaxial vibration damping mechanism 16 is provided by connecting the vibration isolation floor 10 and the side wall portion 6b of the building housing 6, the reaction force accompanying the vibration damping action of the vibration damping mechanism 16 is applied to the vibration isolation floor 10 due to bending stress. Therefore, in consideration of the bending stress, the thickness of the member must be set large, which not only increases the weight of the entire structure, but also the vibration-isolating floor 10 and the building frame. There was a limit to the degree of freedom of the member design.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to improve the installation of a uniaxial vibration damping device that attenuates relative vibration between a supporting structure and a supported structure. The object is to unitize the work in a narrow space between the support structure and the supported structure as much as possible.

  In order to achieve the above object, the invention according to claim 1 is a uniaxial vibration damping unit that is interposed between a support structure and a supported structure and damps the relative vibrations of the support structure and the supported structure. A hatch that is detachably attached to a mounting opening formed through the floor of the support structure; a locking plate that is provided opposite the hatch and is abutted and locked to the support structure; and A center guide that is provided at the center of the stop plate and the hatch and slides relative to each other and guides the movement of the lock plate and the hatch in a uniaxial direction; both ends of the hatch and the lock plate Are connected to each other, and the damping means includes a cantilevered steel bar damper having one end fixed to the locking plate, the other end of the steel bar damper, and the hatch. And one end of the connecting material is attached to the mounting surface of the hatch. In the mounting opening, a recess for mounting work that faces the mounting surface is formed to extend radially outward from the outer peripheral edge of the hatch, and the recess for mounting work is detachable. It is configured so as to be closed with a simple lid.

  According to a second aspect of the present invention, in the uniaxial vibration damping unit according to the first aspect, a spring member is provided on an outer peripheral portion of the center guide so as to be interposed between the locking plate and the hatch. And

  According to a third aspect of the present invention, in the uniaxial vibration damping unit according to the first or second aspect, the steel rod damper is provided on the locking plate, and is curved along the center guide. Features.

  According to a fourth aspect of the present invention, in the uniaxial vibration damping unit according to the third aspect of the present invention, a pressing plate is provided on the inner side of the other end of the steel rod damper so as to abut against the other end and restrict displacement to the inner side of the other end. It is provided.

  According to a fifth aspect of the present invention, in the uniaxial vibration damping unit according to the first to fourth aspects, the steel rod damper is formed thicker toward the fixed end side.

  According to a sixth aspect of the present invention, in the uniaxial vibration damping unit according to any one of the first to fifth aspects, the support structure is a building frame that is horizontally isolated by a horizontal vibration isolation device, and the supported structure is a vibration isolation floor. It is characterized by being.

  Hereinafter, embodiments of a uniaxial vibration damping unit according to the present invention will be described in detail with reference to the accompanying drawings.

<< First Embodiment >>
FIG. 1 is a schematic configuration diagram of a first embodiment schematically showing an example in which a uniaxial vibration damping unit of the present invention is applied to a vibration-isolating floor having a three-dimensional vibration isolation structure. This uniaxial vibration damping unit 30 is a unitized uniaxial vibration damping mechanism that exhibits both a vibration displacement absorbing function and a vibration damping function.

  As shown in the figure, a building housing 6 that is isolated in the horizontal direction is provided on the support base 2 via a horizontal vibration isolator 4 that includes a laminated rubber 4a and a horizontal damper 4b. Above the floor 6a of the building housing 6, a vibration-isolating floor 10 serving as a supported structure is disposed at a predetermined interval with the building housing 6 as a supporting structure, and the floor of the building housing 6 is disposed. Between the surface 6a and the vibration isolation floor 10, there is provided a uniaxial vibration damping unit 30 according to the present invention that exhibits a vertical vibration absorption / damping function to perform vertical vibration isolation.

  The uniaxial vibration damping unit 30 having the vibration displacement absorbing function and the vibration damping function is provided so as to be detachably mounted on a mounting opening 32 formed through the vibration isolation floor 10, and facing the hatch 34. The locking plate 36 that is brought into contact with and locked to the upper surface of the waist wall 6c erected on the floor surface 6a of the building housing 6 is provided at the center of the locking plate 36 and the hatch 34. A center guide 38 that guides the relative movement in one axial direction by allowing the locking plate 36 and the hatch 34 to move relative to each other in the vertical approaching / separating direction, and the locking plate 36 and the hatch 34. A spring member 40 that is interposed between the spring member 40 and the outer periphery of the center guide 38, and a damping means 52 that is locked to both ends of the locking plate 36 and the hatch 34. The hatch 34 is attached to the mounting opening 32. , It forms part of the immune Fuyuka 10.

  The mounting opening 32 formed through the vibration-isolating floor 10 has a circular shape, and an upper portion thereof is enlarged to have a large diameter and is provided with a step portion 32a. The hatch 34 is formed corresponding to the size of the mounting opening 32, the flange portion 34 a corresponding to the stepped portion 32 a is enlarged in diameter on the upper side, and the flange portion 34 a is formed on the stepped portion 32 a of the mounting opening 32. The structure is fixed by bolts.

  At the center of the lower surface of the hatch 34, a sliding shaft 38a constituting a center guide 38 protrudes downward and is provided integrally. On the other hand, the locking plate 36 has a disk shape, and a sliding cylinder 38b constituting a center guide 38 projects upward and is integrally provided at the center of the upper surface thereof. The sliding shaft 38a engages in the horizontal direction and is slidably fitted along the upper and lower axial directions, so that the relative movement between the hatch 34 and the locking plate 36 is restricted in the upper and lower uniaxial directions.

  A coil spring, a disc spring, or the like can be used for the spring member 40 disposed on the outer peripheral portion of the center guide 38 and interposed between the hatch 34 and the locking plate 36. When the coil spring is used, both ends thereof are fixed to the hatch 34 and the locking plate 36, respectively, so that the center spring 38 can function as a holding means 42 that holds the sliding engagement state. A plurality of coil springs having a small diameter may be provided outside the center guide 38 at equal intervals, and a coil spring having a large diameter may be provided coaxially with the center guide 38. When a disc spring is used, a holding means such as a stopper for preventing the fitting state between the sliding shaft 38a of the center guide 38 and the sliding cylinder 38b from being removed is provided separately. The sliding shaft 38a and the sliding cylinder 38b prevent the assembled disc springs from coming off. The sliding stroke is structured such that the sliding state is maintained from the state where the disc spring is fully extended to the state where it is fully contracted.

  Also, the locking plate 36 and the locking plate contact portion on the support structure side with which the locking plate 36 is contacted, that is, the upper surface of the waist wall 6c erected on the floor surface 6a of the building housing 6 In this case, it is desirable to form the concave / convex fitting portions 48 that receive a shearing force acting perpendicularly to the sliding direction of the center guide 38 so as to be fitted to each other. In the illustrated example, the lower side of the sliding cylinder 38b is used as the concave fitting portion 48a, and the convex fitting portion 48b is integrally formed with the waist wall 6c on the upper surface of the waist wall 6c.

  2 to 6 specifically show the configuration of the uniaxial vibration damping unit 30 and the damping means 52, and FIG. 2 is a plan view of the uniaxial damping unit 30 as seen from the floor surface side. 3 is a cross-sectional view taken along line III-III in FIG. 2, FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a plan view of a steel rod damper forming damping means 52, and FIG. It is a perspective view of the steel bar damper. That is, as shown in FIGS. 2 to 6, the damping means 52 is a steel bar damper 54 provided on either the vibration-isolating floor 10 or the locking plate 36 on the supported structure side including the hatch 34, and The steel bar damper 54 is mainly composed of a connecting material 56 that connects either the vibration-isolating floor 10 or the locking plate 36, and in this embodiment, the steel bar damper 54 has one end on the upper surface of the locking plate 36. Are integrally formed by welding.

  The steel rod damper 54 has a fixed portion 54a at one end welded to the locking plate 36 in a block shape, and a cantilevered rod-shaped portion 54b is directed sideways at the upper end of the block-shaped fixed portion 54a. The rod-shaped portion 54b is curved and formed in an arc shape along the sliding tube 38b of the center guide 38. Further, the rod-shaped portion 54b of the steel rod damper 54 is formed to be thicker toward the fixed end side, and its cross-sectional area is smoothly reduced toward the tip, so that it extends as a connecting portion with one end of the connecting material 56. The end has a round shaft shape.

  A connecting metal fitting 58 that is fitted to the round shaft-shaped rod-shaped portion 54b is integrally formed at the lower end of the connecting member 56 that is coupled to the extending end of the rod-shaped portion 54b that is the other end of the steel rod damper 54. The connecting fitting 58 is rotatably fitted to a rod-shaped portion 54b having a round shaft shape. On the other hand, the other end of the connecting material 56 is fixedly locked to a mounting surface 34 b formed in a recessed manner on the outer peripheral surface below the flange portion 34 a of the hatch 34 via a fixing bracket 60. Further, the mounting opening 32 of the vibration isolation floor 10 is provided with a mounting operation recess 62 that faces the mounting surface 34b of the damping means 52 formed on the hatch 34 so as to face the outer peripheral edge of the flange 34a of the hatch 34. The working recess 62 is closed by a detachable lid 64. As shown in FIG.

  In addition, a pressing plate 66 is provided inside the connection fitting 58 so as to be integrally welded to the upper surface of the locking plate 36 so that the steel rod damper 54 can be smoothly deformed in the vertical direction. The inner surface of the center guide side is in contact with the pressing plate 66 via a roller member or the like, and when the rod-shaped portion 54b of the steel rod damper 54 is deformed up and down, the surface faces toward the center guide 38 side. Displacement in the inward direction is restricted. Here, the pressing plate 66 is formed such that the outer surface with which the connection fitting 58 abuts is a circular arc surface centered on the axis of the center guide.

  Further, through holes 68 and 70 are formed coaxially at the center of the hatch 34 and the sliding shaft 38a of the center guide 38, and the through holes 68 and 70 and the sliding cylinder 38b have the above described inside. A restraining means 72 is provided for connecting the hatch 34 and the locking plate 36 to temporarily fix the spring member 40 in a compressed state. The restraining means 72 is provided with a sliding shaft 38a of the center guide 38 and a sliding cylinder. It also functions as an engagement holding means for holding the engagement state with 38b.

  In the illustrated example, the restraining means 72 includes a bolt 72a and a nut 72b, and the bolt 72a is integrally fixed to a bottom wall 38d of a sliding cylinder 38b whose lower end is integrated with the locking plate 36. . The bottom wall 38d includes a concave fitting portion 48a formed on the side of the locking plate 36 and a sliding cylinder of the concave and convex fitting portion 48 provided on the locking plate 36 and the upper surface of the waist wall 6c of the building housing 6. 38b is partitioned. The convex fitting portion 48 b provided on the upper surface of the waist wall 6 c as the concave and convex fitting portion 48 is formed by integrally fitting a fitting shaft 48 d on the steel plate 48 c, and the steel plate 48 c is supported by the anchor 49. It is integrated with the upper surface of the wall 6c.

  The through-hole 68 of the hatch 34 is formed with a stepped portion 68a having an enlarged diameter on the upper side, and a nut 72b screwed to the bolt 72a is abutted and locked to the stepped portion 68a and tightens the nut 72b. Thus, a predetermined supporting load is applied to the spring member 40 between the hatch 34 and the locking plate 36 in advance, and the total length of the uniaxial vibration unit 30 is temporarily fixed to a predetermined length and held. To get.

  Furthermore, a hanging metal fitting 74 is attached to the restraining means 72 so as to hang the uniaxial vibration damping unit 30 with a rope or the like when the uniaxial vibration damping unit 30 is installed and to be inserted into the mounting opening 32 at an upper portion in the through hole 68. The upper end of the through hole 68 is closed by a lid 76 attached to the hatch 34 so as to be freely opened and closed. 2 and 3, reference numeral 35a denotes an insertion hole for a hatch fixing bolt, and reference numeral 35b denotes a hatch fixing bolt.

  In the uniaxial vibration damping unit 30 according to the above configuration, when vibration due to an earthquake or the like is applied to the base, the horizontal vibration is isolated by the new horizontal plane device and transmitted to the building frame 6. Then, the vertical vibration of the building housing 6 is absorbed and attenuated by the uniaxial vibration attenuating means 30 and transmitted to the vibration isolation floor 10, so that the vibration isolation floor 10 is isolated in the three-dimensional direction.

  Here, the uniaxial vibration damping unit 30 has a sliding shaft 38a and a sliding cylinder 38 of the center guide 38 when the floor surface 6a of the building housing 6 and the vibration-isolating floor 10 are relatively vibrated by the vertical vibration of the building housing 6. And the relative displacement is regulated in one axial direction, and the vertical displacement is absorbed by the spring member 40. Then, the displacement of the relative vibration in the vertical direction between the floor surface 6 a of the building housing 6 and the vibration isolation floor 10 is transmitted to the extending end of the rod-shaped portion 54 b of the steel rod damper 54 by the connecting material 56, and the steel rod damper 54 The vibrational energy is consumed and attenuated by plastic deformation.

  Here, since the rod-shaped portion 54b of the steel rod damper 54 is formed in an arcuate shape, the rod-shaped portion 54b tends to be deformed and displaced in the in-plane direction on the center guide side along with its vertical deformation. However, since the connecting fitting 58 at the lower end of the connecting member 56 that is rotatably fitted to the tip of the rod-like portion 54b is in contact with the pressing plate 66 that is erected on the inside, the deformation in the in-plane direction is restricted. The Further, the steel rod damper 54 provided on the locking plate 36 is curved in an arc shape along the outer peripheral edge of the locking plate 36 so that it is accommodated within the outer diameter of the locking plate 36 and is uniaxially damped. The unit 30 can be configured as compact as possible.

  Further, since the rod-like portion 54b is formed thicker toward the fixed end side, and its cross-sectional area is smoothly reduced toward the tip, the stress is equalized as much as possible over the entire length, and the stress is reduced. Concentration is also unlikely to occur, and therefore, plastic deformation is easy over the entire length, and vibration energy can be efficiently consumed and attenuated.

  Further, in the uniaxial vibration damping unit 30, the hatch 34 and the locking plate 36 are connected to each other by a center guide 38 so as to be movable in the vertical and uniaxial directions, and the spring member 40 and damping means are provided between the locking plate 36 and the hatch 34. 52, and the sliding engagement state of the center guide 38 can be held by the restraining means 72. Therefore, the uniaxial vibration damping unit 30 is connected to the building housing 6 and the vibration-isolating floor 10. When installing between them, it can be easily mounted by inserting from the side of the locking plate 36 through the mounting port 32 formed through the vibration isolation floor 10 and fixing the hatch 34 to the mounting port 32.

  That is, when the uniaxial vibration damping unit 30 is installed between the building housing 6 and the vibration isolation floor 10, the uniaxial vibration attenuation unit 30 is attached to the vibration isolation floor 10 that is suspended by a crane or the like. It is possible to mount the hatch 34 by a simple operation by inserting and inserting it into the through-hole mounting opening 32 from the side of the locking plate 36 toward the bottom of the floor and fixing the hatch 34 to the vibration-isolating floor 10 with bolts 35b or the like. it can. In this case, instead of placing the vibration-isolating floor 10 in the suspended state as described above, it is lifted by a jack or the like from the upper surface of the waist wall 6c in advance over the entire length of the uniaxial vibration damping unit 30. After all the uniaxial vibration damping units 30 are installed at predetermined positions, the vibration isolation floor 10 may be lowered by operating a jack. In this case, the jack can be removed if the locking plate 36 of each uniaxial vibration damping unit 30 comes into contact with the upper surface of the waist wall 6c of the building housing 6 and the load of the vibration isolation floor 10 is borne by each uniaxial vibration damping unit 30. It becomes like this.

  Therefore, when the uniaxial vibration damping unit 30 is mounted, the installation work process in a narrow space between the building housing 6 and the vibration-isolating floor 10 can be reduced as much as possible. The improvement can be achieved dramatically. Further, during maintenance, the bolt 35b of the hatch 34 can be removed and the uniaxial vibration damping unit 30 can be lifted onto the vibration-isolating floor 10, so that it is not necessary to work in a narrow underfloor space. It will be very easy to maintain. For this reason, it becomes possible to reduce the installation work in the narrow space between the building frame 6 and the vibration-isolating floor 10 as much as possible, the installation property can be greatly improved, and the maintenance property is also improved.

  In addition, the spring member 40 is compressed by the restraining means 72, and the hatch 34 and the locking plate 36 are temporarily fixed, so that a predetermined supporting load is applied to the spring member 40 in advance to increase the total length of the uniaxial vibration damping unit 30 to a predetermined length. Therefore, when installing the uniaxial vibration damping unit 30 between the building housing 6 and the vibration-isolating floor 10, it is locked through a mounting opening 32 formed through the vibration-isolating floor 10. By inserting from the plate 36 side and fixing the hatch 34, it can be easily mounted on the vibration isolation floor 10, and the vibration isolation floor 10 is previously floated on the upper surface of the waist wall 6c using a crane, a jack, or the like. By adjusting the dimensions to the total length of the uniaxial vibration damping unit 30 in a state of being contracted by applying the predetermined supporting load, the displacement amount of the vibration isolation floor 10 generated after installation can be easily adjusted. Can be, it is also possible to prevent the occurrence displacement at all vertically.

  In addition, since the mounting opening 32 of the vibration isolation floor 10 is provided with a recessed portion 62 for mounting work that faces the mounting surface 34b of the damping means 52 formed on the hatch 32, the restraining means 72 is provided. Therefore, it is useful in the case where a preload sufficiently corresponding to the support load to be borne by the uniaxial vibration damping unit 30 cannot be applied. That is, the upper end 56a of the connecting member 56 of the damping means 52 is in a free state with respect to the fixture 60, the unit 30 is inserted into the mounting port 32, and the hatch 34 is fixed to the surface vibration floor 10 with the fixing bolt 35b. In this state, the surface vibration floor 10 floated upward with a jack or the like is gradually lowered to bring the locking plate 36 of the uniaxial vibration damping unit 30 into contact with the upper surface of the waist wall 6c to bear a supporting load. After a predetermined support load is applied and the vibration isolation floor 10 is supported by the uniaxial vibration damping unit 30, the upper end 56 a of the connecting member 56 of the damping means 52 is fastened to the fixing bracket 60 through the working recess 62. Can be fixed.

  Further, since the spring member 40 and the damping means 52 are integrated and integrated in a single unit, and the uniaxial vibration damping unit 30 having both the vibration displacement absorbing function and the vibration damping function is formed, the vibration displacement absorption is achieved. Compared with the case where the dedicated unit with only the function and the dedicated unit with only the vibration damping function are arranged separately, the total number of units installed and the installation space can be greatly reduced. Labor saving can be achieved.

  Furthermore, since the vibration displacement absorbing function and the vibration damping function are provided in a single unit, the reaction force accompanying the vibration damping action by the vibration damping means 52 acts on the vibration isolation floor 10 as a bending stress. In addition to being able to prevent this, it becomes easy to dispose at an appropriate position corresponding to the weight distribution when supporting the vibration isolation floor 10. Therefore, the stress acting on the vibration-isolating floor 10 and the building frame 6 can be reduced, the thickness of the member can be reduced, and the increase in weight of the entire structure can be suppressed as much as possible. In addition, the degree of freedom in designing the members of the building housing 6 can be increased.

  In addition, a concave and convex fitting portion 48 that is fitted to each other is provided on the locking plate 36 and the upper surface of the waist wall 6c on the building housing 6 side where the locking plate 36 abuts. Since the concave and convex fitting portion 48 receives the horizontal shearing force acting on the upper surface of 6c, that is, the shearing force in the direction perpendicular to the vertical vibration of the seismic isolation floor 10, at the outer peripheral edge of the base isolation floor 10. A horizontal direction orthogonal to the upper and lower vibration isolation directions without a roller or the like for restricting the relative displacement in the horizontal direction or without connecting the locking plate 36 to the upper surface of the waist wall 6c of the building housing 6 with a joining member such as a bolt. It becomes possible to restrain the displacement. In addition, the uniaxial vibration damping unit 30 can be easily installed by simply inserting and mounting the uniaxial vibration damping unit 30 from the mounting port 32 and fitting the concave and convex fitting portion 48 together. The concave / convex fitting portion 48 is reversed upside down so that a convex fitting portion is integrally formed on the lower surface of the locking plate and a concave fitting portion is provided on the upper surface of the waist wall 6c. You may make it do.

<< Second Embodiment >>
7 and 8 show a second embodiment, FIG. 7 is a side sectional view, and FIG. 8 is a plan view. In the uniaxial vibration damping unit 80 of the second embodiment, the following points are different from the uniaxial vibration damping unit 30 of the first embodiment described above. In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment, and the description is abbreviate | omitted.

  That is, the steel rod damper 54 is provided on the surface of the supported structure including the hatch 34 (that is, the hatch 34 or a vibration isolation floor on the side thereof), and one end of the connecting member 56 is pinned to the locking plate 36. The other end is exposed to the surface side of the supported structure through a through hole 82 formed in the hatch 34 and is connected to the other end of the steel rod damper 54. In this illustrated example, the steel rod damper 54 is provided with one end integrally fixed to the upper surface near the center of the hatch 34. The fixing portion 54a also has a block shape, and extends from the upper end portion of the fixing portion 54a to the side of the connecting member 56, and a rod-like portion 54b is integrally formed. Further, the connecting material through hole 82 formed in the hatch 34 has a long rectangular shape along the longitudinal direction of the rod-shaped portion 54b so that the bonding material 56 can move following the deformation of the rod-shaped portion 54b of the steel rod damper 54. The upper end of the connecting member 56 is connected to the extending end of the rod-like portion 54b via a spherical joint 84.

  In the uniaxial vibration damping unit 80 of the second embodiment having the above configuration, when vertical vibrations occur on the floor surface 6 and the vibration isolation floor 10 of the building housing 6, the upper end of the connecting member 56 from the upper surface of the hatch 34 is detected. The amount of protrusion changes and is displaced up and down, the displacement is transmitted to the steel rod damper 54, and a damping action is exhibited by plastic deformation of the rod-shaped portion 54b of the steel rod damper 54. At this time, when vertical deformation occurs in the rod-shaped portion 54b of the steel rod damper 54, the joint 56 of the upper end spherical joint 84 rotates with respect to the steel rod damper 54 along with the deformation. The pin joint portion at the lower end rotates with respect to the locking plate 36 and follows the deformation of the rod-shaped portion 54b of the steel rod damper 54.

  Here, in this uniaxial vibration damping unit 80, the upper surface of the connecting member 56 of the damping means 52 whose lower end is pin-coupled to the locking plate 36 is connected to the surface of the upper surface of the hatch 34 through the through hole 82 formed in the hatch 34. Since the steel rod damper 54 is connected to the steel rod damper 54 fixed to the upper surface of the hatch 34 via the spherical joint 84, the steel rod damper 54 is attached to the outer peripheral side portion of the locking plate 36. There is no need to secure installation space. Therefore, the part below the hatch 34 can be configured as compact as possible.

  Further, since the steel rod damper 54 of the damping means 52 is installed on the upper surface of the hatch 34, there is no need for a mounting recess for fixing the upper end of the connecting member 56 of the damping means 52 to the steel rod damper 54. It is not necessary to form the concave portion by notching the vibration floor 10 or the like. Further, since the steel bar damper 54 is provided on the surface of the hatch 34, maintenance and replacement of the steel bar damper 54 can be easily performed, and the workability is excellent.

  Moreover, although the steel rod damper 54 protrudes on the surface of the hatch 34, in the case of obstruction, the upper surface position of the hatch 34 is lowered from the upper surface of the surrounding vibration-isolating floor 10 and the vibration-isolating floor 10. It is also possible not to protrude from the surface portion. Further, the steel bar damper 54 can be fixed to the seismic isolation floor 10 side of the hatch 34. In this way, the steel bar damper 54 is fixed after the hatch 34 is mounted. The size of 54 can be increased without being affected by the size of the hatch 34, and the damping force by the steel rod damper 54 can be increased. On the contrary, the size of the hatch 34 can be reduced without considering the damping performance of the steel rod damper 54 so that the other portions except the steel rod damper 54 can be made as compact as possible. Become.

<< Third Embodiment >>
9 to 11 show a third embodiment, FIG. 9 is a side sectional view, FIG. 10 is a plan view, and FIG. 11 is a perspective view for explaining the movement of the connecting portion between the connecting member 56 and the steel rod damper 54. . The uniaxial vibration damping unit 100 of the third embodiment is different from the uniaxial vibration damping units 30 and 80 of the first and second embodiments described above in the following points. In addition, the same code | symbol is attached | subjected to the member same as 1st, 2nd embodiment, and the description is abbreviate | omitted.

  That is, coaxial through holes 68 and 70 are formed at the centers of the sliding shaft 38a and the hatch 34 of the center guide 38, respectively, and the through holes 68 and 70 are made of a round shaft rod material. The connecting member 56 of the damping means 52 is disposed, and the lower end of the connecting member 56 is integrally fixed to the bottom wall 38d of the sliding cylinder 38b integrated with the locking plate 36. The upper end of the connecting member 56 is exposed above the hatch 34, and a steel rod damper 54 is connected to the exposed upper end portion.

  On the other hand, one end of the steel bar damper 54 is integrally fixed to the upper surface of the hatch 34, and the fixing portion 54a is in a block shape. A cantilevered bar-like portion 54b is integrally formed at the upper end of the fixed portion 54a so as to extend toward the side of the connecting member 56. A sleeve-like connecting bracket 58A for connecting the steel rod damper 54 is rotatably fitted to the upper end of the connecting member 56, and is fixed to the connecting member 56 above and below the connecting member 58A. A pair of stoppers 102 for restricting movement in the axial direction are provided. Further, on the outer periphery of the connecting metal 58A, a connecting plate 104 is integrally connected to the connecting metal 58A by being pin-bonded or rigidly connected so as to protrude outward in the radial direction. The rod-shaped portion 54b is engaged at the tip. In other words, the steel rod damper 54 is provided with the rod-shaped portion 54b extending in the tangential direction of the connection fitting 58A, and three sets are provided radially at equal intervals with respect to the connection fitting 58A. Here, in order to make the steel rod damper 54 have a large damping force, the rod-shaped portion 54b of the steel rod damper 54 is formed to extend to the outside from the circular flange portion 34a of the hatch 34 so as to be long. Correspondingly, three fixed end mounting portions 106 are radially extended from the outer periphery of the flange portion 34 a to the hatch 34, and the fixed portion 54 a of the steel rod damper 54 is integrated with the fixed end mounting portion 106. Fixed. Note that the fixing portion 54 a of the steel rod damper 54 does not necessarily have to be fixed to the upper surface of the hatch 34, and may be attached and fixed to the upper surface of the vibration isolation floor 10. In this case, as a matter of course, it is not necessary to extend and form the fixed end mounting portion in the hatch 34.

  And in the uniaxial vibration damping unit of 3rd Embodiment of the said structure, if the relative vibration of a vertical direction arises in the floor surface 6a of the building frame 6, and the vibration isolation floor 10, it will protrude from the hatch 34 upper surface of the joining material 56 upper end. Although the amount changes and moves up and down, the connecting bracket 58A is restrained from being moved up and down by the upper and lower stoppers 102 and 102, so that the rod-shaped portion 54b of the steel rod damper 54 is deformed in the vertical direction. Along with the deformation, the connecting plate 104 engaged with the steel bar damper 54 rotates at its pin joint with respect to the connecting bracket 58A, and the connecting bracket 58A is rotatable with respect to the connecting member 56. The deformation of the rod-shaped portion 54b of the steel rod damper 54 is followed.

  Here, in this uniaxial vibration damping unit 100, through holes 68 and 70 are formed in the center portion of the sliding shaft 38a of the center guide 38, the connecting member 56 of the damping means 52 is disposed, and the steel rod Since the damper 54 is fixedly provided on the upper surface of the hatch 34, it is not necessary to provide anything on the outer peripheral side portion of the locking plate 36, so that the portion below the hatch 34 can be configured as compact as possible. The fixed end mounting portion 106 protrudes radially outward from the flange portion 34 a on the surface side of the hatch 34, but the uniaxial vibration damping unit 100 is inserted through the mounting port 32 from the surface side of the vibration isolation floor 10. Therefore, there is no problem with the installation. If the steel bar damper 54 is fixed to the seismic isolation floor 10 on the side of the hatch 34, the steel bar damper 54 is fixed after the hatch 34 is mounted. There is no need to provide it, and further compactness can be achieved.

  In each of the embodiments described above, a case has been shown in which each is applied to the vibration-isolating floor 10 and arranged vertically so as to absorb vertical vibrations. However, the uniaxial vibration damping units 30 and 80 according to the present invention are shown. 100 may be arranged in the horizontal direction, and the arrangement direction is not limited.

  As described above, the uniaxial vibration damping unit according to this embodiment exhibits the following excellent effects.

(1) A uniaxial vibration damping unit is a unit in which a hatch and a locking plate are movably connected in a uniaxial direction by a center guide, and a spring member and damping means are interposed between the locking plate and the hatch. Since the sliding engagement state of the center guide can be held by the connecting material, when installing the uniaxial vibration damping unit between the support structure and the supported structure, the supported structure It can be easily mounted by inserting it from the side of the locking plate through the mounting port formed in the hole and fixing the hatch to the mounting port.

  That is, for example, when the uniaxial vibration damping unit is installed between the building frame and the vibration isolation floor, the uniaxial vibration attenuation unit is attached to the vibration isolation floor that is suspended by a crane or the like. It can be attached to the mouth with a simple operation by inserting and inserting the hatch from the side of the locking plate toward the bottom of the floor and fixing the hatch to the vibration isolation floor with bolts, etc. The installation work process in a narrow space can be reduced as much as possible, and the installation property can be greatly improved. During maintenance, the hatch can be removed from the mounting opening and the uniaxial vibration damping unit can be lifted onto the vibration-isolating floor for maintenance work, eliminating the need to work in a narrow underfloor space. It will be very excellent in performance. For this reason, it becomes possible to reduce the installation work in the narrow space between the building frame and the vibration-isolating floor as much as possible, and the installability can be greatly improved and the maintainability is also improved.

(2) When the spring member and the damping means are integrated and integrated into a single unit, and the uniaxial vibration damping unit having both the vibration displacement absorbing function and the vibration damping function, only the vibration displacement absorbing function is provided. Compared with the case where the dedicated unit and the dedicated unit with only the vibration damping function are arranged separately, the total number of units installed and the installation space can be greatly reduced, and the installation work can be saved as much as possible. I can plan.

  Furthermore, since the vibration displacement absorbing function and the vibration damping function are combined in a single unit, the reaction force accompanying the vibration damping action by the vibration damping means acts as a bending stress on the vibration isolation floor. In addition to being able to prevent this, it becomes easy to dispose at an appropriate position according to the weight distribution when supporting the vibration-isolating floor 10. Therefore, the stress acting on the vibration-isolating floor and the building frame can be reduced, and the thickness of the member can be reduced to suppress the increase in the weight of the entire structure as much as possible. The degree of freedom in design can be increased.

(3) A steel rod damper provided on the locking plate can be formed into a compact shape by being curved in an arc shape along the outer peripheral edge of the locking plate.

(4) If the steel rod damper is curved in an arc shape, it will be deformed and displaced in the in-plane direction on the center guide side as it is deformed up and down, but a holding plate is attached to the tip side of the steel rod damper. By providing and contacting, deformation in the in-plane direction can be restricted.

(5) The steel rod damper is formed thicker toward the fixed end side, and the cross-sectional area is smoothly reduced toward the tip, thereby equalizing the stress as much as possible over the entire length. And stress concentration is less likely to occur. Therefore, plastic deformation can be caused over the entire length and the cost can be reduced, and vibration energy can be efficiently consumed and attenuated.

(6) The lower end of the connecting member of the damping means is coupled to the locking plate, and the upper end is led to the surface side of the upper surface of the hatch through a through-hole formed in the hatch, and is connected to a steel rod damper fixed on the upper surface of the hatch. By doing so, it is only necessary to secure a connecting space for the connecting material on the outer peripheral side portion of the locking plate, so that a portion inserted from the mounting opening of the supported structure of the uniaxial vibration damping unit to the back side is allowed. It can be made compact. In addition, because there is a steel bar damper as a damping means on the surface of the hatch, fixing work between the steel bar damper and the connecting material, maintenance work, and replacement work of the steel bar damper can be performed easily, resulting in excellent workability. .

  Furthermore, it is possible to fix the steel bar damper to the supported structure side of the hatch side, and in this way, the steel bar damper will be fixed after the hatch is installed. The size can be increased without being affected by the size of the hatch, and the damping force by the steel rod damper can be increased. On the other hand, the size of the hatch can be reduced without considering the damping performance of the steel bar damper, and the other parts excluding the steel bar damper can be made as compact as possible.

(7) If a through hole is formed in the center part of the sliding shaft of the center guide, a connecting member for the damping means is provided, and the steel rod damper is fixedly provided on the surface of the hatch, the locking plate There is no need to provide anything on the outer peripheral side portion of the uniaxial vibration damping unit. Therefore, the portion inserted from the mounting opening of the supported structure of the uniaxial vibration damping unit to the back side can be made more compact.

(8) By providing the uniaxial vibration damping unit between the floor surface of the support structure subjected to horizontal vibration isolation and the vibration isolation floor disposed above the floor surface, the three-dimensional vibration isolation floor is simply configured. be able to.

It is a schematic block diagram of 1st Embodiment which shows typically the example which applied the uniaxial vibration damping unit of this invention to the vibration-isolation floor of a three-dimensional vibration isolation structure. It is the top view seen from the floor surface side which made concrete the structure of the uniaxial vibration damping unit and its damping means. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. It is a top view of the steel bar damper which makes a damping means. It is a perspective view of a steel bar damper. It is a sectional side view which shows 2nd Embodiment. It is a top view which shows 2nd Embodiment. It is a sectional side view which shows 3rd Embodiment. It is a top view which shows 3rd Embodiment. It is a perspective view explaining the motion of the connection part of the joining material of 3rd Embodiment, and a steel bar damper. It is a figure which shows the uniaxial vibration absorption mechanism used for the conventional vibration isolation floor.

Explanation of symbols

2 Base 4 Horizontal isolation device 6 Building frame (support structure) 10 Isolation floor (supported structure)
DESCRIPTION OF SYMBOLS 30 Uniaxial vibration damping unit 32 Mounting port 34 Hatch 36 Locking plate 38 Center guide 38a Sliding shaft 38b Sliding cylinder 40 Spring member 40A Belleville spring laminated body 52 Damping means 54 Steel rod damper 54a Fixing portion 54b Rod-shaped portion 56 Connecting material 58 , 58A Connecting bracket 60 Fixing bracket 66 Holding plate 68, 82 Hatch through hole 70 Sliding shaft through hole 80 Uniaxial vibration damping unit 100 Uniaxial vibration damping unit

Claims (6)

A uniaxial vibration damping unit that is interposed between the supporting structure and the supported structure and attenuates their relative vibrations,
A hatch that is detachably attached to an attachment port formed through the floor of the supported structure;
A locking plate provided facing the hatch and abutted and locked to the support structure side;
A center guide that is provided at a central portion of the locking plate and the hatch and slides relative to each other, and guides movement of the locking plate and the hatch in one axial direction;
A damping means provided with both ends connected to the hatch and the locking plate;
The damping means
A cantilevered steel bar damper provided with one end fixed to the locking plate;
It consists of a connecting material that connects the other end of the steel rod damper and the hatch,
One end of the connecting material is attached to the mounting surface of the hatch,
In the mounting opening, a recess for mounting work that faces the mounting surface is formed to be expanded to the outside in the radial direction from the outer peripheral edge of the hatch,
The uniaxial vibration damping unit is characterized in that the mounting recess is closed with a detachable lid. 2. The uniaxial vibration damping unit according to claim 1, wherein a spring member is provided on an outer peripheral portion of the center guide so as to be interposed between the locking plate and the hatch. The uniaxial vibration damping unit according to claim 1, wherein the steel rod damper is provided on the locking plate and is curved along the center guide. 4. The uniaxial vibration damping unit according to claim 3, wherein a pressing plate is provided on the inner side of the other end of the steel rod damper so as to abut against the other end and restrict displacement toward the inner side of the other end. The uniaxial vibration damping unit according to any one of claims 1 to 4, wherein the steel rod damper is formed thicker toward a fixed end side. The uniaxial vibration damping according to any one of claims 1 to 5, wherein the supporting structure is a building frame horizontally isolated by a horizontal vibration isolator, and the supported structure is a vibration-isolating floor. unit.

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