JP2016090034A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device which can generate large viscosity resistance, and can alleviate vibration.SOLUTION: A vibration control device 1 comprises: an upper cylinder plate 10 which is arranged so as to be immersed into a viscous body 4 in a tub 3, and has a first recess 12 which is upwardly recessed, and extends in a first horizontal direction X; a lower cylinder plate 20 which is located at a lower side of the upper cylinder plate 10, fixed to a bottom face of the tub 3, and has a second recess 22 which is downwardly recessed, and extends in a second horizontal direction Y; and a piston plate 30 which is arranged between the upper cylinder plate 10 and the lower cylinder plate 20 so as to be relatively movable with respect to the plates, closes the first recess 12 from below by an upper face 31, closes the second recess 22 from above by a lower face 33, and has a first protrusion 32 which is formed at the upper face 31, and protrudes into the first recess 12, and a second protrusion 34 which is formed at the lower face 33, and protrudes into the second recess 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vibration damping device that is installed between an upper structure such as a building and a lower structure such as a foundation and that suppresses transmission of vibration due to an earthquake or the like from the lower structure to the upper structure.

  Conventionally, a vibration damping device configured to immerse a disc provided at the lower end of a support post fixed to an upper structure such as a building in a viscous material housed in a container fixed to a lower structure such as a foundation. Proposed. In such a vibration damping device, the disc moves in the viscous body in the horizontal direction, thereby causing viscous shearing in the viscous body and generating a viscous resistance force to attenuate the vibration.

  However, in the conventional vibration damping device, the viscous material is biased in the direction in which the liquid level rises toward the side on which the disk has moved due to the movement of the disk, and the opposite side is in the direction in which the liquid level is lowered. My body cuts out. In this case, due to the difference in liquid level between the side on which the disc has moved and the opposite side, when the disc has moved to the opposite side, the viscous resistance force is not so much generated. As a result, the vibration damping device cannot generate a large viscous resistance force and cannot attenuate the vibration.

  Accordingly, an object of the present invention is to provide a vibration damping device that can generate a large viscous resistance force and can attenuate vibrations.

  A vibration damping device according to an aspect of the present invention is a vibration damping device installed between an upper structure and a lower structure, and a connection portion connected to the upper structure on the upper side and an upper side on the lower side. An upper member having a first recess extending in the first horizontal direction, a receiving portion connected to the lower structure and containing a viscous material, and positioned below the upper member, A lower member that is provided on the bottom surface and has a second concave portion that is recessed downward and extends in the second horizontal direction intersecting the first horizontal direction, and is movable relative to the upper member and the lower member The first recess is disposed between the upper member and the lower member, and the first recess is closed from below by the upper surface, and the second recess is closed from above by the lower surface. A first convex portion projecting into the first concave portion and a second convex portion provided on the lower surface. And an intermediate member having a second protrusion.

  Both ends in the first horizontal direction of the first recess of the upper member may be closed, and both ends in the second horizontal direction of the second recess may be closed.

  A gap is formed between the first concave portion of the upper member and the first convex portion of the intermediate member, and the second concave portion of the lower member and the second convex portion of the intermediate member A gap may be formed between the two.

  The upper member communicates the inside of the first recess and the outside of the first recess in the vicinity of both ends of the first recess in the first horizontal direction, and the inside of the first recess A pair of first through holes that allow inflow of the viscous body and outflow of the viscous body from within the first recess are formed, and the lower member has the second horizontal of the second recess. In the vicinity of both ends in the direction, the inside of the second recess and the outside of the second recess are communicated, and the inflow of the viscous body into the second recess and the viscous body from inside the second recess A pair of second through holes that allow outflow may be formed.

  A pair of third through holes are formed in the intermediate member so as to sandwich the first convex portion in the first horizontal direction, and the second convex portion is formed in the second horizontal direction. A pair of fourth through holes may be formed so as to be sandwiched.

  The first horizontal length of the first recess of the upper member is configured to be shorter than the first horizontal length of the intermediate member, and the second recess of the lower member is The horizontal length 2 may be shorter than the second horizontal length of the intermediate member.

  Both ends in the first horizontal direction of the first recess of the upper member may be opened, and both ends in the second horizontal direction of the second recess of the lower member may be opened.

  A plurality of the first recesses are formed in the upper member, a plurality of the second recesses are formed in the lower member, and the first protrusions correspond to the plurality of first recesses, A plurality of the second protrusions may be provided on the intermediate member, and a plurality of the second protrusions may be provided on the intermediate member corresponding to the plurality of second recesses.

  According to the present invention, it is possible to provide a vibration damping device that can generate a large viscous resistance force and can attenuate vibrations.

The perspective view of the damping device concerning a 1st embodiment is shown. The disassembled perspective view of the damping device of FIG. 1 is shown. It is a figure which shows the state of a damping device when a lower structure moves to a horizontal direction. The disassembled perspective view of the damping device which concerns on 2nd Embodiment is shown. (A) is sectional drawing in the plane orthogonal to the 1st horizontal direction of the 1st recessed part of an upper cylinder plate, and the 1st convex part of a piston plate, (b) shows 1st recessed part of an upper cylinder plate. Sectional drawing in the plane orthogonal to the 2nd horizontal direction of a 1st convex part of a recessed part and a piston plate is shown. The disassembled perspective view of the damping device which concerns on 3rd Embodiment is shown. The disassembled perspective view of the damping device which concerns on 4th Embodiment is shown.

  A vibration damping device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the vibration damping device 1 according to the first embodiment, and FIG. 2 is an exploded perspective view of the vibration damping device 1.

  The vibration damping device 1 in the present embodiment is a vibration damping device installed in a seismic isolation layer between an upper structure such as a building and a lower structure such as a foundation.

  As shown in FIGS. 1 and 2, the vibration damping device 1 includes an eaves 3 that is a housing portion, an upper cylinder plate 10 that is an upper member having a mounting flange 2, a lower cylinder plate 20 that is a lower member, And a piston plate 30 as a member.

  The mounting flange 2 that is a connecting portion is made of steel or the like, has a flange portion 2A, and a fixing portion 2B, and the flange 2A is fixed to the upper structure with a bolt or the like. The fixed portion 2B is fixed to the lower surface of the flange portion 2A.

  The gutter 3 is made of a steel material or the like, has a bottomed cylindrical shape whose upper side is opened by the bottom portion 3A and the cylindrical portion 3B, and is connected and fixed to the lower structure by a bolt or the like. The cylindrical portion 3B has a substantially rectangular shape in plan view. Moreover, the ridge 3 accommodates the viscous body 4. The viscous body 4 is composed of a high-viscosity polymer material, and its viscous resistance has a speed dependency.

  The upper cylinder plate 10 is composed of a single plate material made of steel or the like, has a substantially rectangular shape in plan view, and is fixed to the fixing portion 2B by bolts, welding, or the like. The upper cylinder plate 10 has a plurality of (four in this embodiment) first semi-cylindrical portions 11 formed by press-molding a plate material. Each first semi-cylindrical portion 11 extends along a first horizontal direction X indicated by an arrow X in FIG. 2, and a cross section perpendicular to the first horizontal direction X forms a semicircular shape and is recessed upward. The recess 12 is provided. Both ends (one end portion 12A and the other end portion 12B in FIG. 3) of each first recess 12 in the first horizontal direction X are open.

  The lower cylinder plate 20 is composed of a single plate made of steel or the like, has a substantially rectangular shape in plan view, and is fixed to the bottom 3A of the flange 3 by bolts, welding, or the like. The lower cylinder plate 20 has a plurality of (four in this embodiment) second semi-cylindrical portions 21 formed by press-molding a plate material. Each second semi-cylindrical portion 21 extends along a second horizontal direction Y indicated by an arrow Y in FIG. 2, and a second cross-section perpendicular to the second horizontal direction Y forms a semicircular shape and is recessed downward. The recess 22 is provided. Both ends (one end 22A and the other end 22B in FIG. 3) of each second recess 22 in the second horizontal direction Y are open. In the present embodiment, the second horizontal direction Y is a direction orthogonal to the first horizontal direction X. Note that the second horizontal direction Y only needs to intersect the first horizontal direction X.

  The piston plate 30 is composed of a single plate material made of steel or the like, has a substantially rectangular shape in plan view, and is disposed between the upper cylinder plate 10 and the lower cylinder plate 20. The upper surface 31 of the piston plate 30 closes the first recesses 12 of the upper cylinder plate 10 from the lower side, and the lower surface 33 of the piston plate 30 closes the second recesses 22 of the lower cylinder plate 20 from the upper side. .

  A plurality of (four in this embodiment) first convex portions 32 are provided on the upper surface 31 of the piston plate 30 corresponding to the plurality of first concave portions 12. Each of the first convex portions 32 is provided in the vicinity of the center of the upper surface 31 in the first horizontal direction X so as to protrude into the corresponding first concave portion 12. On the lower surface 33 of the piston plate 30, a plurality of (four in this embodiment) second convex portions 34 are provided corresponding to the plurality of second concave portions 22. Each second convex portion 34 is provided in the vicinity of the center of the lower surface 33 in the second horizontal direction Y so as to protrude into the corresponding second concave portion 22.

  With such a configuration, a simple cylinder-piston mechanism is configured by each first semi-cylindrical portion 11 of the upper cylinder plate 10 and the corresponding first convex portion 32 of the piston plate 30, and similarly, the lower cylinder plate A simple cylinder-piston mechanism is constituted by each second semi-cylindrical part 21 of 20 and the corresponding second convex part 34 of the piston plate 30.

  Since the first convex portion 32 and the second convex portion 34 of the piston plate 30 are each formed by pressing a plate material, a concave portion is formed on the lower surface 33 side of the first convex portion 32 of the piston plate 30. Is formed, and a concave portion is formed on the upper surface 31 side of the second convex portion 34 of the piston plate 30.

  Further, each first convex portion 32 of the piston plate 30 has a shape corresponding to the shape of the corresponding first concave portion 12 of the upper cylinder plate 10 and is fitted so that there is no gap. Similarly, each second convex portion 34 of the piston plate 30 has a shape corresponding to the shape of the corresponding second concave portion 22 of the lower cylinder plate 20 and is fitted so that there is no gap. Actually, a slight gap is formed between the first convex portion 32 and the first convex portion 12 and between the second convex portion 34 and the second concave portion 22 in manufacturing. Is done.

  The piston plate 30 is placed on the lower cylinder plate 20, and the upper cylinder plate 10 is placed on the piston plate 30. The first concave portions 12 of the upper cylinder plate 10 extend along the first horizontal direction X, and the first convex portions 32 of the piston plate 30 are in the corresponding first concave portions 12 of the upper cylinder plate 10. Therefore, the upper cylinder plate 10 is configured to be movable only along the first horizontal direction X with respect to the piston plate 30.

  Further, each second recess 22 of the lower cylinder plate 20 extends along the second horizontal direction Y, and each second protrusion 34 of the piston plate 30 is within the corresponding second recess 22 of the lower cylinder plate 20. The piston plate 30 is configured to be movable only along the second horizontal direction Y with respect to the lower cylinder plate 20. In other words, the piston plate 30 is configured to be movable relative to the upper cylinder plate 10 and the lower cylinder plate 20.

  The upper cylinder plate 10, the lower cylinder plate 20, and the piston plate 30 are configured to have substantially the same dimensions in the first horizontal direction X and the second horizontal direction Y. Further, the upper cylinder plate 10, the lower cylinder plate 20, and the piston plate 30 are in a state immersed in the viscous body 4.

  Next, the vibration damping operation by the vibration damping device 1 will be described with reference to FIGS.

  For example, when an earthquake occurs, vibration is transmitted to the lower structure, and the lower structure moves in the horizontal direction. Here, it is assumed that the lower structure has moved in a third horizontal direction Z (lower left side of the drawing) intersecting the first horizontal direction X and the second horizontal direction Y shown in FIG.

  Along with the movement of the lower structure, the lower cylinder plate 20 fixed to the flange 3 and the flange 3 also moves in the third horizontal direction Z. At this time, as shown in FIG. 3, the lower cylinder plate 20 and the piston plate 30 have the first concave portions 12 in which the first convex portions 32 of the piston plate 30 extend in the first horizontal direction X of the upper cylinder plate 10. Since it fits in, it moves to the lower left side of the drawing along the first horizontal direction X relative to the upper cylinder plate 10. Furthermore, since each 2nd convex part 34 of the piston plate 30 fits in the 2nd recessed part 22 extended in the 2nd horizontal direction Y of the lower cylinder plate 20, the lower cylinder plate 20 and the upper cylinder plate 10 and The piston plate 30 moves relative to the lower right side of the drawing along the second horizontal direction Y.

  Then, when the piston plate 30 moves along the first horizontal direction X with respect to the upper cylinder plate 10, each first protrusion 32 of the piston plate 30 corresponds to the corresponding first first of the upper cylinder plate 10. Move in the recess 12. Only the 1st convex part 32 and the 1st recessed part 12 which are located in the foremost side of FIG. 3 have shown the state which the 1st convex part 32 moved inside the 1st recessed part 12. FIG. As a result, the viscous body 4 in each first recess 12 of the upper cylinder plate 10 is pushed by the corresponding first protrusion 32 and flows out from one end 12 </ b> A of the first recess 12. On the other hand, the viscous body 4 around the other end 12 </ b> B of the first recess 12 flows into the first recess 12.

  Similarly, when the lower cylinder plate 20 moves along the second horizontal direction Y with respect to the piston plate 30, each second convex portion 34 of the piston plate 30 corresponds to the corresponding second of the lower cylinder plate 20. Relatively moves in the recess 22. Only the second convex portion 34 and the second concave portion 22 located on the leftmost side in FIG. 3 show a state in which the second convex portion 34 has relatively moved in the second concave portion 22. As a result, the viscous body 4 in each second recess 22 of the lower cylinder plate 20 is pushed by the corresponding second protrusion 34 and flows out from one end 22 </ b> A of the second recess 22. On the other hand, the viscous body 4 around the other end 22 </ b> B of the second recess 22 flows into the second recess 22.

  The vibration is attenuated by the viscous resistance force caused by the flow of the viscous body 4 as described above.

  Further, the viscous body 4 having speed dependency generates a viscous resistance force according to the moving speed of the first convex portion 32 and the second convex portion 34 of the piston plate 30. That is, when the first convex portion 32 of the piston plate 30 tries to move at a high speed relative to the upper cylinder plate 10, the viscous body 4 generates a large viscous resistance force. Similarly, when the second convex portion 34 of the piston plate 30 tries to move at a relatively high speed with respect to the lower cylinder plate 20, the viscous body 4 generates a large viscous resistance force. As described above, when the first convex portion 32 and the second convex portion 34 of the piston plate 30 move at a high speed relative to the upper cylinder plate 10 and the lower cylinder plate 20, the piston plate 30 vibrates due to a large viscous resistance force. Can be attenuated.

  On the other hand, when the first convex portion 32 of the piston plate 30 moves at a relatively low speed with respect to the upper cylinder plate 10, a large viscous resistance force is not generated in the viscous body 4. Similarly, when the second convex portion 34 of the piston plate 30 tries to move at a low speed relative to the lower cylinder plate 20, a large viscous resistance force is not generated in the viscous body 4.

  As described above, in the vibration damping device 1 of the present embodiment, the upper surface 31 of the piston plate 30 closes the first recess 12 of the upper cylinder plate 10 from the lower side, and the lower surface 33 of the piston plate 30 is the upper cylinder plate. 10 second recesses 22 are closed from above, and corresponding first projections 32 of the piston plate 30 are provided in the respective first recesses 12 of the upper cylinder plate 10 so as to protrude from the lower cylinder plate 20. The second convex portion 34 of the piston plate 30 is provided so as to protrude into each of the second concave portions 22.

  Therefore, a simple cylinder-piston mechanism is configured by each first semi-cylindrical portion 11 of the upper cylinder plate 10 and the corresponding first convex portion 32 of the piston plate 30, and each of the first cylinder portions of the lower cylinder plate 20 is similarly configured. A simple cylinder-piston mechanism is configured by the two semi-cylindrical portions 21 and the corresponding second convex portions 34 of the piston plate 30.

  In such a configuration, when the earthquake occurs, the lower structure moves in the horizontal direction, so that the piston plate 30 moves relative to the upper cylinder plate 10 and the lower cylinder plate 20. As a result, the first convex portion 32 and the second convex portion 34 of the piston plate 30 move in the first concave portion 12 of the upper cylinder plate 10 and the second concave portion 22 of the lower cylinder plate 20, respectively. The viscous body 4 flows and a viscous resistance force is generated. In this way, a simple cylinder-piston mechanism is configured, and by operating the cylinder-piston mechanism, a large viscous resistance force can be generated and a large vibration can be attenuated.

  Further, both ends (one end portion 12A and the other end portion 12B) of the first concave portion 12 of the upper cylinder plate 10 in the first horizontal direction X are opened, and the second concave portion 22 of the lower cylinder plate 20 is opened. 2 in the horizontal direction Y (one end 22A and the other end 22B) are open. Thereby, by the relative movement of the first convex portion 32 and the second convex portion 34 of the piston plate 30 with respect to the first concave portion 12 of the upper cylinder plate 10 and the second concave portion 22 of the lower cylinder plate 20, The viscous body 4 flows out or flows in from both ends (one end 12A and the other end 12B) of the first recess 12 and from both ends (one end 22A and the other end 22B) of the second recess 22. Can be made to flow. By causing the viscous body 4 to flow in this way, a large viscous resistance force can be generated, and vibration can be attenuated.

  A plurality of first recesses 12 of the upper cylinder plate 10 and a plurality of second recesses 22 of the lower cylinder plate 20 are formed, and a plurality of first protrusions 32 and second protrusions 34 of the piston plate 30 A plurality of first recesses 12 and at least one plurality of second recesses 22 are provided. Accordingly, each of the first convex portions 32 and the second convex portions 34 moves relative to the corresponding first concave portion 12 and each second concave portion 22 to generate a larger viscous resistance force. Can be made.

  Next, a vibration damping device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an exploded perspective view of the vibration damping device 101 according to the second embodiment. In addition, about the same member as the damping device 1 of 1st Embodiment, the same reference number is attached | subjected and description is abbreviate | omitted and only a different part is demonstrated.

  In the present embodiment, the shapes of the upper cylinder plate 110 and the lower cylinder plate 120 are different from those of the upper cylinder plate 10 and the lower cylinder plate 20 of the first embodiment.

  Specifically, in the first embodiment, the lengths of the first horizontal direction X and the second horizontal direction Y of the upper cylinder plate 10, the lower cylinder plate 20, and the piston plate 30 are configured to be substantially equal. It was. However, the length of the upper cylinder plate 110 in the first embodiment in the first horizontal direction X is shorter than the length of the piston plate 30 in the first horizontal direction X (substantially half the length in this embodiment). The length in the second horizontal direction Y of the lower cylinder plate 120 of this embodiment is configured to be shorter than the length of the piston plate 30 in the second horizontal direction Y (substantially half the length in this embodiment). Yes.

  Therefore, the length in the first horizontal direction X of the first recess 112 of each first semi-cylindrical portion 111 of the upper cylinder plate 110 is configured to be shorter than the length in the first horizontal direction X of the piston plate 30. The second horizontal direction Y length of the second concave portion 122 of each second semi-cylindrical portion 121 of the lower cylinder plate 120 is configured to be shorter than the length of the piston plate 30 in the second horizontal direction Y. Yes.

  The length of the upper cylinder plate 110 in the second horizontal direction Y is substantially equal to the length of the piston plate 30 in the second horizontal direction Y, and the dimension of the lower cylinder plate 120 in the first horizontal direction X is The length of the piston plate 30 in the first horizontal direction X is substantially equal.

  Furthermore, in the first embodiment, both ends (one end 12A and the other end 12B) of each first recess 12 of the upper cylinder plate 10 in the first horizontal direction X are opened, and the lower cylinder plate 20 is opened. Both ends (one end 22A and the other end 22B) of each second recess 22 in the second horizontal direction Y were open. However, the first closing portions 114 are provided at both ends in the first horizontal direction X of each first recess 112 of the upper cylinder plate 110 of the present embodiment, and both ends (one end portion) of the first recess 112 are provided. 112A and the other end 112B), the second closing portions 124 are provided at both ends in the second horizontal direction Y of the respective second recesses 122 of the lower cylinder plate 120, and the second recesses 122 Both ends (one end 122A and the other end 122B) are closed (see also FIG. 5B).

  Therefore, a substantially sealed space 116 (FIG. 5B) is defined by the first recess 112 of the upper cylinder plate 110, the upper surface 31 of the piston plate 30, and the first closing portion 114, and the first cylinder plate 120 of the lower cylinder plate 120. A substantially sealed space is defined by the two concave portions 122, the lower surface 33 of the piston plate 30, and the second closing portion 124.

  FIG. 5A shows a cross-sectional view in a plane perpendicular to the first horizontal direction X of the first concave portion 112 of the upper cylinder plate 110 and the first convex portion 32 of the piston plate 30 in the present embodiment. FIG. 5B is a cross-sectional view of the first concave portion 112 of the upper cylinder plate 110 and the first convex portion 32 of the piston plate 30 in a plane orthogonal to the second horizontal direction Y.

  As shown in FIGS. 5A and 5B, a gap G is formed between the first concave portion 112 of the upper cylinder plate 110 and the first convex portion 32 of the piston plate 30. Further, as shown in FIG. 5B, the substantially sealed space 116 defined by the first semi-cylindrical portion 111, the first closing portion 114, and the upper surface 31 is the first convex portion of the piston plate 30. 32 is divided into two spaces 115 and 116. Although not shown, a gap similar to the gap G is also formed between the second concave portion 122 of the lower cylinder plate 120 and the second convex portion 34 of the piston plate 30, and the second semi-cylinder is formed. The substantially sealed space defined by the portion 121, the second closing portion 124, and the upper surface 34 is also divided into two spaces by the second convex portion 34 of the piston plate 30.

  When the lower structure is moved in the horizontal direction (for example, the third horizontal direction Z intersecting the first horizontal direction X and the second horizontal direction Y in FIG. 4) due to an earthquake or the like, each of the piston plates 30 is moved. One convex portion 32 moves in the corresponding first concave portion 112 of the upper cylinder plate 110, and each second convex portion 34 of the piston plate 30 moves in the corresponding second concave portion 122 of the lower cylinder plate 120. To move. The viscous body 4 moves through the two spaces 115 and 116 through the gap G by the movement of the first convex portion 32 of the piston plate 30. When the viscous body 4 moves through the gap G, a large viscous resistance force is generated, and the vibration is attenuated. Similarly, the movement of the second convex portion 34 of the piston plate 30 causes the viscous body 4 to move through the two spaces through the gap, and the movement of the viscous body 4 generates a large viscous resistance force, causing vibration. Attenuated.

  As described above, in the present embodiment, both ends (one end 112A and the other end 112B) of the first recess 112 of the upper cylinder plate 110 in the first horizontal direction X are the first closed portions 114. Both ends (one end 122A and the other end 122B) of the second recess 122 of the lower cylinder plate 120 in the second horizontal direction Y are blocked by the second closing portion 124. Yes. Therefore, a substantially sealed space 116 is defined by the first concave portion 112 of the upper cylinder plate 110, the upper surface 31 of the piston plate 30, and the first closing portion 114, and the second concave portion 122 of the lower cylinder plate 120, the piston plate 30. A substantially sealed space is defined by the lower surface 33 and the second closing portion 124. Therefore, a large viscous resistance force can be generated by causing the viscous body 4 to flow in the sealed space.

  Further, a gap G is formed between the first concave portion 112 of the upper cylinder plate 110 and the first convex portion 32 of the piston plate 30, and the first concave portion 122 of the lower cylinder plate 120 and the piston plate A gap similar to the gap G is also formed between the 30 second convex portions 34. Therefore, the viscous body 4 moves in the two spaces 115 and 116 through the gap G by the movement of the first convex portion 32 of the piston plate 30, and a large viscous resistance force is generated by the movement of the viscous body 4. Vibration can be attenuated. Similarly, the movement of the second convex portion 34 of the piston plate 30 causes the viscous body 4 to move through the two spaces through the gap, and the movement of the viscous body 4 generates a large viscous resistance force, causing vibration. Can be attenuated.

  The first horizontal direction X length of the first recess 112 of the upper cylinder plate 110 is configured to be shorter than the first horizontal direction X length of the piston plate 30, and the second cylinder plate 120 has a second length. The length of the concave portion 122 in the second horizontal direction Y is configured to be shorter than the length of the piston plate 30 in the second horizontal direction Y. Thus, the relative movement of the piston plate 30 with respect to the upper cylinder plate 110 and the lower cylinder plate 120 can suppress the opening of the substantially sealed space, and a constant flow resistance can be obtained.

  Next, a vibration damping device according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is an exploded perspective view of the vibration damping device 201 according to the third embodiment. In addition, about the same member as the damping device 1 and 101 of 1st and 2nd embodiment, the same reference number is attached | subjected and description is abbreviate | omitted and only a different part is demonstrated.

  As shown in FIG. 6, the upper cylinder plate 210 of this embodiment is substantially the same as the configuration of the upper cylinder plate 110 (FIG. 4) of the second embodiment, and in addition to that configuration, a pair of first through holes. 215 is formed. The pair of first through holes 215 are formed in the vicinity of both ends (one end 112 </ b> A and the other end 112 </ b> B) of each first recess 112 of the upper cylinder plate 210. Each first through-hole 215 communicates the inside of the first recess 112 with the outside. Via each first through hole 215, the viscous body 4 can flow into the first recess 112 and the viscous body 4 can flow out from the first recess 112.

  The lower cylinder plate 220 is substantially the same as the configuration of the lower cylinder plate 120 of the second embodiment, and a pair of second through holes 225 is formed in addition to the configuration. The pair of second through holes 225 are formed in the vicinity of both ends (one end 122A, the other end 122B) of each second recess 122 of the lower cylinder plate 220. Through the second through holes 225, the inside of the second recess 122 communicates with the outside. Via each second through hole 225, the viscous body 4 can flow into the second concave portion 122 and the viscous body 4 can flow out from the second concave portion 122.

  In the present embodiment, each first protrusion 32 of the piston plate 30 is fitted to the corresponding first recess 112 of the upper cylinder plate 210 so that there is no gap. Similarly, each second convex portion 34 of the piston plate 30 is fitted to the corresponding second concave portion 122 of the lower cylinder plate 220 so that there is no gap. Actually, a slight gap is formed between the first convex portion 32 and the first convex portion 112 and between the second convex portion 34 and the second concave portion 122 in manufacturing. Is done.

  Then, when the lower structure is moved in the horizontal direction (for example, the third horizontal direction Z intersecting the first horizontal direction X and the second horizontal direction Y in FIG. 6) due to an earthquake or the like, each of the piston plates 30 is moved. One convex portion 32 moves in the corresponding first concave portion 112 of the upper cylinder plate 210, and each second convex portion 34 of the piston plate 30 moves in the corresponding second concave portion 122 of the lower cylinder plate 220. To move. As the first convex portions 32 of the piston plate 30 move, the viscous bodies 4 in the first concave portions 112 of the upper cylinder plate 210 are pushed, and the pushed viscous body 4 has one first through hole. 215 flows out.

  Then, the viscous body 4 around the other first through hole 215 flows into the first recess 112. Similarly, the viscous body 4 in each second concave portion 122 of the lower cylinder plate 220 is pushed by the movement of each second convex portion 34 of the piston plate 30, and the pushed viscous body 4 becomes one second Out of the through hole 225. Then, the viscous body 4 around the other second through hole 225 flows into the second recess 122. Since the viscous body 4 flows in this way, a large viscous resistance force is generated and the vibration is attenuated.

  As described above, in the present embodiment, a pair of through holes 215 are formed in the vicinity of both ends of each first recess 112 of the upper cylinder plate 210, and a pair of in the vicinity of both ends of the second recess 122 of the lower cylinder plate 220. A through hole 225 is formed. For this reason, the movement of each first convex portion 32 of the piston plate 30 causes the viscous body 4 in the corresponding first concave portion 112 to flow out from one first through hole 215, and the viscous body 4 moves to the other first. Flows into the first recess 112 from one through hole 215. Due to the movement of the viscous body 4, a large viscous resistance force is generated, and the vibration can be attenuated. Similarly, due to the movement of each second convex portion 34 of the piston plate 30, the viscous body 4 in the corresponding second concave portion 122 flows out from one second through hole 225, and the viscous body 4 moves to the other second through-hole 225. Flows into the first recess 122 from the two through holes 225. Due to the movement of the viscous body 4, a large viscous resistance force is generated, and the vibration can be attenuated.

  Next, a vibration damping device according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is an exploded perspective view of the vibration damping device 301 according to the fourth embodiment. In addition, about the same member as the damping device 1 and 101 of 1st and 2nd embodiment, the same reference number is attached | subjected and description is abbreviate | omitted and only a different part is demonstrated.

  As shown in FIG. 7, the piston plate 330 of the present embodiment is substantially the same as the configuration of the piston plate 30 of the first embodiment, and in addition to the configuration, each first protrusion in the first horizontal direction X. A pair of third through holes 35 are formed so as to sandwich the portion 32, and a pair of fourth through holes 36 are formed so as to sandwich each second convex portion 34 in the second horizontal direction Y. . In FIG. 7, for simplification of the drawing, only a pair of third through holes 35 formed so as to sandwich the first convex portion 32 located on the most front side in FIG. Only a pair of fourth through holes 36 formed so as to sandwich the second convex portion 34 located on the leftmost side in FIG.

  When the lower structure is moved in the horizontal direction (for example, the third horizontal direction Z intersecting the first horizontal direction X and the second horizontal direction Y in FIG. 7) due to an earthquake or the like, each of the piston plates 330 is moved. One convex portion 32 moves in the corresponding first concave portion 112 of the upper cylinder plate 210, and each second convex portion 34 of the piston plate 330 moves in the corresponding second concave portion 122 of the lower cylinder plate 220. To move. Due to the movement of each first convex portion 32 of the piston plate 330, the viscous body 4 in each first concave portion 112 of the upper cylinder plate 210 is pushed, and the pushed viscous body 4 has one third through hole. Out of 35.

  Then, the viscous body 4 around the other third through hole 35 flows into the first recess 112. Similarly, by the movement of each second convex portion 34 of the piston plate 330, the viscous body 4 in each second concave portion 122 of the lower cylinder plate 220 is pushed, and the pushed viscous body 4 is one of the fourth fourth portions. Flows out of the through hole 36 of the. Then, the viscous body 4 around the other fourth through hole 36 flows into the second recess 122. Since the viscous body 4 flows in this way, a viscous resistance force is generated and the vibration is attenuated.

  As described above, in the present embodiment, the pair of third through holes 35 are formed on the piston plate 330 so as to sandwich the first convex portions 32 in the first horizontal direction X, and the second horizontal holes are formed. In the direction Y, a pair of fourth through holes 36 are formed so as to sandwich each second convex portion 34. For this reason, due to the movement of each first convex portion 32 of the piston plate 330, the viscous body 4 in the corresponding first concave portion 112 flows out from the one third through hole 35, and the viscous body 4 moves to the other first. Flows into the first recess 112 from the three through holes 35. Due to the movement of the viscous body 4, a large viscous resistance force is generated, and the vibration can be attenuated. Similarly, due to the movement of each second convex portion 34 of the piston plate 330, the viscous body 4 in the corresponding second concave portion 122 flows out from one fourth through hole 36, and the viscous body 4 moves to the other Flows into the first recess 122 through the four through holes 36. Due to the movement of the viscous body 4, a large viscous resistance force is generated, and the vibration can be attenuated.

  In addition, this invention is not limited to the Example mentioned above. A person skilled in the art can make various additions and changes within the scope of the present invention.

  For example, each first convex portion 32 and each second convex portion 34 of the piston plate 30 are formed by pressing a plate material, but the first and second convex portions are attached by attaching protrusions to the plate material. A part may be formed. Further, the upper cylinder plate 10 and the lower cylinder plate 20 are configured to integrally include a plurality of first semi-cylindrical portions 11 and second semi-cylindrical portions 12 by press-molding one plate material. However, each 1st semi-cylinder part 11 and each 2nd semi-cylinder part 12 are comprised separately, and it is made to respond | correspond to each 1st convex part 32 and each 2nd convex part 34 of the piston plate 30. Each first semi-cylindrical part 11 and each second semi-cylindrical part 12 may be arranged.

  The cross sections of the first concave portion 12 of the upper cylinder plate 10 and the second concave portion 22 of the lower cylinder plate 20 are semicircular, and the first convex portion 32 and the second convex portion 34 of the piston plate 30 are The shape corresponding to the semicircular shape was formed. However, the cross section of the first recess 12 of the upper cylinder plate 10 and the second recess 22 of the lower cylinder plate 20 may be triangular or quadrangular (for example, trapezoidal or rectangular), and the first of the piston plate 30 The convex portion 32 and the second convex portion 34 may have a shape corresponding to the triangular shape or the quadrangular shape (for example, a trapezoid or a rectangle). That is, the first concave portion 12 of the upper cylinder plate 10 and the second concave portion 22 of the lower cylinder plate 20 and the first convex portion 32 and the second convex portion 34 of the piston plate 30 have shapes corresponding to each other. It only has to be done.

  In the above embodiment, the first convex portion 32, the first concave portions 12, 112, the second convex portion 34, and the second concave portions 22, 122 are provided, respectively. Any number of them may be used, for example, one.

DESCRIPTION OF SYMBOLS 1, 101, 201, 301: Damping device, 2: Mounting flange, 3: Rod, 4: Viscous material, 10, 100: Upper cylinder plate, 12, 112: 1st recessed part, 20, 120: Lower cylinder plate , 22, 122: second recess, 30, 330: piston plate, 31: upper surface, 32: first protrusion, 33: lower surface, 34: second protrusion, 35: third through hole, 36 : Fourth through hole, 215: first through hole, 225: second through hole

Claims (8)

A vibration damping device installed between the upper structure and the lower structure,
An upper member having a connecting portion connected to the upper structure on the upper side and a first concave portion extending in the first horizontal direction on the lower side;
A receiving portion connected to the lower structure and containing a viscous material;
A lower member which is provided on the bottom surface of the housing portion and is located on the lower side of the upper member and has a second concave portion which is recessed downward and extends in the second horizontal direction intersecting the first horizontal direction;
The upper member is disposed between the upper member and the lower member so as to be movable relative to the upper member and the lower member, and the first recess is closed from below by the upper surface and the second recess by the lower surface. An intermediate member having a first convex portion which is closed from the upper side and which is provided on the upper surface and protrudes into the first concave portion, and a second convex portion which is provided on the lower surface and protrudes into the second concave portion; A vibration damping device comprising:   2. The control according to claim 1, wherein both ends of the first recess of the upper member in the first horizontal direction are closed, and both ends of the second recess in the second horizontal direction are closed. Shaker.   A gap is formed between the first concave portion of the upper member and the first convex portion of the intermediate member, and the second concave portion of the lower member and the second convex portion of the intermediate member The vibration damping device according to claim 2, wherein a gap is formed between the first and the second. The upper member communicates the inside of the first recess and the outside of the first recess in the vicinity of both ends of the first recess in the first horizontal direction, and the inside of the first recess A pair of first through-holes that allow inflow of the viscous body and outflow of the viscous body from within the first recess are formed,
In the lower member, the inside of the second recess and the outside of the second recess are communicated with each other in the vicinity of both ends of the second recess in the second horizontal direction. 3. The vibration damping device according to claim 2, wherein a pair of second through holes that allow inflow of the viscous body and outflow of the viscous body from within the second recess are formed. In the intermediate member,
In the first horizontal direction, a pair of third through holes are formed so as to sandwich the first convex portion,
The vibration damping device according to claim 2, wherein a pair of fourth through holes are formed so as to sandwich the second convex portion in the second horizontal direction. The first horizontal length of the first recess of the upper member is configured to be shorter than the first horizontal length of the intermediate member,
The length in the second horizontal direction of the second recess of the lower member is configured to be shorter than the length of the intermediate member in the second horizontal direction. Damping device according to item.   The both ends in the first horizontal direction of the first recess of the upper member are opened, and both ends of the second recess of the lower member in the second horizontal direction are opened. The vibration control device described in 1. A plurality of the first recesses are formed in the upper member,
A plurality of the second recesses are formed in the lower member,
A plurality of the first protrusions are provided on the intermediate member corresponding to the plurality of first recesses,
The said 2nd convex part is a damping device as described in any one of Claims 1-7 with which the said intermediate member is provided with two or more corresponding to the said several 2nd recessed part.

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