JP2011047421A - Damping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the time of installation work of a damping device while maintaining vibration damping efficiency of an upper part building at an earthquake within assumption. <P>SOLUTION: If a relative movement amount of a foundation 14 and an upper part structure 16 exceeds a predetermined value, a piston 32 provided at the end of a rod 30 contacts a pressed portion 58 of a stopper means 26 and the pressed portion 58 is pressed to the cylinder side by the piston 32. Thereby, the stopper means 26 generates a larger damping force than that generated by a damping means 24. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an attenuation device.

  Conventionally, there has been known a seismic isolation structure that reduces the seismic force generated in the structure by extending the vibration period of the structure by supporting the structure with a seismic isolation device such as a laminated rubber bearing or a sliding bearing. Yes. However, in recent years, long-period earthquakes have attracted attention, and excessive deformation of seismic isolation devices during long-period earthquakes has been regarded as a problem. That is, if a structure having a long period due to the seismic isolation device resonates with the vibration period of the long period earthquake, the amount of deformation of the seismic isolation device becomes excessive, and the seismic isolation device may be damaged or damaged.

  On the other hand, in patent document 1, the stopper which suppresses the excessive deformation | transformation of a seismic isolation apparatus is proposed. This stopper is used together with an oil damper, and includes a cylinder attached to the lower structure and a rod attached to the upper building and inserted so as to be movable in the axial direction of the cylinder. In this cylindrical body, a coil spring (spring body) with which a pressing portion provided at the tip of the rod comes into contact in the event of an earthquake more than expected is provided. By suppressing the relative movement between the lower structure and the upper building by the restoring force of the coil spring, excessive deformation of the laminated rubber disposed between the lower structure and the upper building is suppressed.

  However, in patent document 1, since a stopper and an oil damper are used together, it takes time to install these. Moreover, if the oil damper is omitted to reduce the installation work, the vibration damping efficiency of the upper building at the time of the expected earthquake is lowered.

No. 3-23004

  In view of the above facts, an object of the present invention is to reduce the effort of installing the damping device while maintaining the vibration damping efficiency of the structure during an expected earthquake.

  The damping device according to claim 1 is provided between the first structure and the second structure that move relative to each other, and generates a damping force to cause relative movement between the first structure and the second structure. Between the first structure and the second structure, and is provided between the first structure and the second structure, and generates a damping force larger than that of the attenuation means. Stopper means for suppressing relative movement, and the damping means is inserted into the cylinder for containing the fluid and the relative movement between the first structure and the second structure. A rod inserted into and removed from the cylinder; and a pressed portion provided in the stopper means when the relative movement amount of the first structure and the second structure exceeds a predetermined value. And a pressing portion that generates a damping force by pressing.

  According to said structure, a rod is inserted / removed with respect to a cylinder with the relative movement of a 1st structure and a 2nd structure. Thereby, the damping means generates a damping force, and the relative movement between the first structure and the second structure is attenuated. Further, when the relative movement amount between the first structure and the second structure exceeds a predetermined value, the pressed portion provided in the stopper means is pressed by the pressing portion provided in the rod, and the stopper means becomes the damping means. Produces a greater damping force. Thereby, the relative movement between the first structure and the second structure is further attenuated. That is, the damping means generates a damping force for an earthquake or the like that is assumed, and the stopper means generates a damping force together with the damping means for an earthquake or the like that is more than expected. Accordingly, it is possible to suppress the excessive deformation of the first structure and the second structure by maintaining the vibration damping efficiency with respect to the expected earthquake and the like, and allowing the stopper means to function as a buffer during an unexpected earthquake.

  As described above, according to the present invention, since one attenuation device includes the attenuation device and the stopper device, it is more troublesome to install the attenuation device as compared with the conventional case where the attenuation device and the stopper device are separately installed. Is reduced. Further, since the pressing portion pushes the pressed portion of the stopper means and generates a damping force on the stopper means, the damping force can be generated on the stopper means before exceeding the allowable deformation amount of the damping means. Therefore, breakage and damage of the damping means can be suppressed.

  The damping device according to a second aspect is the damping device according to the first aspect, wherein the cylinder is connected to the first structure, the rod is connected to the second structure, and the pressing portion is And when the relative movement amount of the first structure and the second structure exceeds a predetermined value, the one of the pair of the stopper means is disposed between the pair of the stopper means provided in the cylinder. The pressed part is pressed by the pressing part.

According to said structure, the press part is arrange | positioned between a pair of stopper means. Therefore, regardless of the direction in which the rod is inserted into the cylinder or the direction in which the rod is removed from the cylinder, the pressed portion of the stopper means is pushed by the pressing portion, and the stopper means generates a damping force. To do. That is, according to the present invention, even if the first structure and the second structure move relative to each other in the axial direction of the rod, the stopper means generates a damping force, and the first structure and the second structure And excessive deformation can be suppressed.
Moreover, the external shape of the damping device can be simplified by disposing the stopper means in the cylinder. Therefore, the size of the attenuation device can be reduced.

  A damping device according to a third aspect is the damping device according to the first aspect, wherein the cylinder is connected to the first structure, the rod is connected to the second structure, and the pressing portion is , Provided in the rod penetrating the cylinder and projecting from both axial ends of the cylinder, and when the relative movement amount of the first structure and the second structure exceeds a predetermined value, the axial direction of the cylinder One said pressed part of the said stopper means provided in the both ends is pressed by the said pressing part.

According to said structure, the rod has penetrated the cylinder. The rods that protrude from both ends of the cylinder in the axial direction are each provided with a pressing portion. Stopper means are provided at both ends of the cylinder in the axial direction. Therefore, regardless of the direction in which the rod is inserted into the cylinder or the direction in which the rod is removed from the cylinder, the pressed portion of the stopper means is pushed by the pressing portion, and the stopper means generates a damping force. To do. That is, according to the present invention, even if the first structure and the second structure move relative to each other in the axial direction of the rod, the stopper means generates a damping force, and the first structure and the second structure And excessive deformation can be suppressed.
Further, since the stopper means is provided outside the cylinder, adjustment of the operation timing of the stopper means and maintenance of the stopper means are facilitated.

  Since this invention set it as said structure, it can reduce the effort of installation work of a damping device, maintaining the vibration damping efficiency of the structure at the time of the earthquake of assumption.

It is an elevation which shows the building in which the attenuation device concerning a 1st embodiment of the present invention was installed. (A) and (B) are the expansion explanatory views of Drawing 1 showing the attenuation device concerning a 1st embodiment of the present invention. It is expansion explanatory drawing which shows the stopper means which concerns on 1st Embodiment of this invention. It is an expansion explanatory view showing the attenuation device concerning a 2nd embodiment of the present invention. It is an expansion explanatory view showing the attenuation device concerning a 3rd embodiment of the present invention. It is expansion explanatory drawing which shows the modification of the attenuation device which concerns on 3rd Embodiment of this invention. It is an expansion explanatory view showing the attenuation device concerning a 4th embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the first embodiment will be described.

  FIG. 1 shows a building 12 in which an attenuation device 10 according to the first embodiment is installed. The building 12 includes a foundation (first structure) 14 and an upper structure (second structure) 16 constructed on the foundation 14. In the seismic isolation layer G formed between the foundation 14 and the upper structure 16, a plurality of seismic isolation devices 18 composed of laminated rubber bearings, sliding bearings, rolling bearings, or the like are arranged. By these seismic isolation devices 18, the upper structure 16 is supported so as to be movable relative to the foundation 14. On the other hand, the upper structure 16 and the foundation 14 are provided with connecting portions 20 and 22, respectively. The attenuation device 10 is connected to these connecting portions 20 and 22.

  As shown in FIGS. 2A, 2B, and 3, the damping device 10 generates damping force and damping means 24 that attenuates relative movement between the foundation 14 and the upper structure 16. And stopper means 26 that generates a damping force larger than that of the damping means 24 and functions as a cushioning material when the relative movement amount between the foundation 14 and the upper structure 16 exceeds a predetermined value. The damping means 24 includes a cylinder 28, a rod 30 that can be inserted into and removed from the cylinder 28, and a piston 32 that serves as a pressing portion provided on the rod 30. The damping device 10 is disposed between the foundation 14 and the upper structure 16 with the axis of the cylinder 28 as the horizontal direction.

  The cylinder 28 is formed in a cylindrical shape, and the inside thereof is a fluid storage chamber 36 that stores a fluid S such as oil. An insertion hole 40 as a guide mechanism is formed in an end plate 38 provided at an end portion in the axial direction of the cylinder 28, and the rod 30 is inserted into the insertion hole 40 so as to be removable. The rod 30 is guided by the insertion hole 40 so that the rod 30 can move in the axial direction of the cylinder 28 (direction of arrow A). Although not shown, the insertion hole 40 is provided with a seal member such as an O-ring that prevents fluid leakage from the fluid storage chamber 36.

  A piston 32 (pressing portion) is provided at the tip of the rod 30. The piston 32 is disposed in the fluid storage chamber 36, and the fluid storage chamber 36 is partitioned into two fluid storage chambers 36 </ b> A and 36 </ b> B by the piston 32. The piston 32 is provided with an orifice 42 that communicates the fluid storage chamber 36A and the fluid storage chamber 36B. The damping force of the damping means 24 is adjusted by increasing or decreasing the cross-sectional area of the orifice 42 and the viscosity (viscosity coefficient) of the fluid S.

  An end portion of the rod 30 opposite to the piston 32 protrudes from the cylinder 28, and serves as an attachment portion 30 </ b> A connected to the connection portion 20 provided in the upper structure 16. The mounting portion 30A is connected to the connecting portion 20 so as to be rotatable in a horizontal plane with the vertical axis as a rotation axis. Specifically, the attachment portion 30 </ b> A is disposed between a pair of connection plates 44 provided in the connection portion 20. A connecting pin 46 passes through the mounting portion 30A and the connecting plate 44 in the vertical direction, and the rod 30 is rotatably connected in a horizontal plane with the axis of the connecting pin 46 as a rotation axis. As a result, when the upper structure 16 moves relative to the base 14 in two horizontal directions, for example, when the upper structure 16 moves relative to the direction orthogonal to the axis of the rod 30, the rod 30 is generated. The bending moment is suppressed.

  As shown in FIG. 3, stopper means 26 is provided at the axial end of the cylinder 28 opposite to the rod 30. The stopper means 26 includes a casing 48 and a rod 50 protruding from the casing 48, and an axial end of the cylinder 28 is coupled to the casing 48. A cylinder 52 is provided inside the casing 48. The cylinder 52 is formed in a cylindrical shape, and the inside thereof is a space 54. An insertion hole 56 is formed in the outer wall 48 </ b> A of the casing 48 that partitions the space 54 and the fluid storage chamber 36 </ b> B of the damping means 24. The rod 50 is inserted into the insertion hole 56 so as to be removable. The rod 50 is guided by the insertion hole 56 so that the rod 50 can move in the axial direction of the cylinder 52 (direction of arrow A). Although not shown, the insertion hole 56 is provided with a seal member such as an O-ring that prevents fluid leakage from the fluid storage chamber 36B.

  A pressed portion 58 is provided at the end of the rod 50 protruding from the cylinder 52. The pressed portion 58 is formed in a disk shape and is disposed in the cylinder 28 of the damping means 24. Here, the axis of the rod 50 of the stopper means 26 and the axis of the rod 50 of the damping means 24 coincide with each other, and the pressed portion 58 can move in the cylinder 28 of the damping means 24 in the axial direction. . The pressed portion 58 faces the piston 32 and is provided with a gap (gap H in FIG. 2A) between the piston 32 of the damping means 24 in the initial state, and between the foundation 14 and the upper structure 16. When the relative movement amount exceeds a predetermined value, it is pushed into the cylinder 52 side by the piston 32 as a pressing portion that has moved in the cylinder 28. At this time, since the rod 30 of the damping means 24 is guided by the insertion hole 40, the piston 32 contacts the pressed portion 58 in a state of facing the pressed portion 58. That is, the piston 32 pushes the pressed portion 58 in a state where the axis of the rod 50 of the stopper means 26 and the axis of the rod 30 of the damping means 24 coincide or substantially coincide. Thereby, the eccentric bending which generate | occur | produces in the rod 50 of the stopper means 26 is reduced. The gap H between the pressed portion 58 and the piston 32 in the initial state is appropriately adjusted according to the allowable relative deformation amount between the foundation 14 and the upper structure 16.

  An elastic body 60 such as a coil spring is provided between the pressed portion 58 and the casing 48, and the pressed portion 58 is urged toward the piston 32 by the elastic body 60. That is, the pressed portion 58 pushed into the cylinder 52 by the piston 32 can move to the initial state (initial position) by the urging force of the elastic body 60.

  A piston 62 is provided at the end of the rod 50 opposite to the pressed part 58. The piston 62 is disposed in the cylinder 52, and the space 54 is partitioned by the piston 62 into a fluid storage chamber 54A and an air chamber 54B. A fluid T such as oil is accommodated in a fluid accommodation chamber 54 </ b> A provided on the opposite side of the rod 50 of the piston 62.

  A fluid storage chamber 64 is provided outside the cylinder 52. On the side wall 52A and the bottom wall 52B of the cylinder 52 that separates the fluid storage chamber 64 and the fluid storage chamber 54A, orifices 66 and 68 with check valves that communicate the fluid storage chamber 54A and the fluid storage chamber 64 are formed. Yes. The check valve at the orifice 66 allows only movement of the fluid T from the fluid storage chamber 54A to the fluid storage chamber 64, while the check valve at the orifice 68 allows the fluid T from the fluid storage chamber 64 to the fluid storage chamber 54A. Only movement is allowed. Accordingly, when the rod 50 moves in the direction in which the rod 50 is inserted into the cylinder 52, the fluid T accommodated in the fluid accommodation chamber 54 </ b> A passes through the orifice 66 and moves to the fluid accommodation chamber 64. Conversely, when the rod 50 moves in the direction in which it is pulled out of the cylinder 52, the fluid T accommodated in the fluid accommodation chamber 64 passes through the orifice 68 and moves to the fluid accommodation chamber 54A.

  As the rod 50 is inserted into the cylinder 52, the volume of the fluid storage chamber 54A gradually decreases, and the number of orifices 66 through which the fluid T can pass decreases. That is, the total cross-sectional area of the orifice 66 varies depending on the movement amount (stroke amount) of the piston 62. The damping force generated by the stopper means 26 is adjusted by increasing / decreasing the arrangement of the orifices 66, the sectional area of each orifice, and the viscosity (viscosity coefficient) of the fluid T.

  Further, the casing 48 is provided with a mounting portion 70 that is connected to the connecting portion 22 provided on the foundation 14. The attachment portion 70 is connected to the connection portion 22 (see FIG. 2A) of the foundation 14 so as to be rotatable in a horizontal plane with the vertical axis as a rotation axis. Specifically, the attachment portion 70 is plate-shaped and protrudes from the outer wall 48 </ b> B of the casing 48, and is disposed between a pair of connection plates 72 provided in the connection portion 22. A connecting pin 74 passes through the mounting portion 70 and the connecting plate 72 in the vertical direction, and a casing 48 is rotatably connected in a horizontal plane with the axis of the connecting pin 74 as a rotation axis. Thereby, the bending moment generated in the rod 30 when the upper structure 16 moves relative to the foundation 14 in two horizontal directions is suppressed.

  Next, the operation of the first embodiment will be described.

  When expected relative movement occurs between the foundation 14 and the upper structure 16 due to wind or earthquake, the damping means 24 generates a damping force. That is, the rod 30 is inserted into and removed from the cylinder 28 with the relative movement between the foundation 14 and the upper structure 16. As a result, the fluid S passes through the orifice 42 provided in the piston 32, and the fluid S moves between the fluid storage chamber 36A and the fluid storage chamber 36B. The fluid resistance (pressure loss or the like) when the fluid S passes through the orifice 42 becomes a damping force, and the relative movement between the foundation 14 and the upper structure 16 is attenuated.

  On the other hand, when the relative movement amount between the foundation 14 and the upper structure 16 exceeds a predetermined value (gap H), the piston 32 provided at the tip of the rod 30 comes into contact with the pressed portion 58 of the stopper means 26, and the piston 32, the pressed portion 58 is pushed into the cylinder 52 side. As a result, the fluid T passes through the orifice 66 with a check valve provided in the side wall 52 </ b> A of the cylinder 52, and the fluid T moves to the fluid storage chamber 64. The fluid resistance (pressure loss or the like) when the fluid T passes through the check valve-equipped orifice 66 becomes a damping force, and the relative movement between the foundation 14 and the upper structure 16 is further damped.

  Here, since the stopper means 26 generates a damping force larger than that of the damping means 24, it functions as a cushioning material that suppresses excessive deformation of the foundation 14 and the upper structure 16. Therefore, excessive deformation between the foundation 14 and the upper structure 16 is suppressed, and breakage and damage of the seismic isolation device 18 provided between the foundation 14 and the upper structure 16 are suppressed. Moreover, the collision with the retaining wall etc. which comprise the upper structure 16 and the foundation 14 is suppressed.

  In this way, the damping means 24 generates a damping force for an expected earthquake or the like, and the stopper means 26 together with the damping means 24 generates a damping force for an earthquake or the like beyond the assumption. Therefore, it is possible to suppress excessive deformation (excessive relative movement) between the foundation 14 and the upper structure 16 in an unexpected earthquake or the like while maintaining vibration damping efficiency with respect to an expected earthquake or the like. Further, since the stopper means 26 is a so-called viscoelastic damper, it is easy to adjust the braking force (damping force) of the upper structure 16 as compared with a coil spring or the like, and the impact force generated in the upper structure 16 is kept small. be able to. In addition, since one damping device 10 includes the damping means 24 and the stopper means 26, compared to the case where the damping means and the stopper means are separately installed as in the prior art, the installation work of the damping device 10 is reduced. Reduced. Further, since the piston 32 of the damping means 24 presses the pressed portion 58 of the stopper means 26 to generate a damping force on the stopper means 26, the damping force is applied to the stopper means 26 before exceeding the allowable deformation amount of the damping means 24. Can be generated. Therefore, breakage and damage of the attenuation means 24 can be suppressed.

  Further, the damping means 24 and the stopper means 26 are connected to the connecting portions 20 and 22 of the upper structure 16 and the foundation 14 so as to be rotatable about the vertical axis as a rotation axis. When the foundation 14 and the upper structure 16 are moved relative to each other in the direction orthogonal to the axis, the bending moment generated in the rod 30 and the cylinder 28 is reduced. Therefore, the lifetime of the attenuation device 10 can be extended. Further, the rod 30 of the damping means 24 moves in the cylinder 28 while being guided by the insertion hole 40. Therefore, the piston 32 pushes the pressed portion 58 toward the cylinder 52 (see FIG. 3) in a state where the axis of the rod 30 of the damping means 24 and the axis of the rod 50 of the stopper means 26 match or substantially match. Therefore, the stress transmission efficiency between the piston 32 and the pressed portion 58 is improved, and the eccentric bending moment generated in the rod 50 is reduced. Therefore, breakage and damage of the rod 50 are suppressed, and the life of the damping device 10 can be extended.

  Next, a second embodiment will be described. Note that the same components as those in the first embodiment are denoted by the same reference numerals and will be appropriately omitted.

  FIG. 4 shows an attenuation device 80 according to the second embodiment. The damping device 80 generates a damping force and attenuates relative movement between the foundation 14 and the upper structure 16 and when the relative movement amount between the foundation 14 and the upper structure 16 exceeds a predetermined value. And a stopper means 84 that generates a damping force larger than that of the damping means 82 and functions as a cushioning material.

  The damping means 82 includes a cylinder 86, a rod 30 that is inserted into the cylinder 86 so as to be detachable, and a piston 88 as a pressing portion provided at the tip of the rod 30. The cylinder 86 is formed in a cylindrical shape, and the inside thereof is a fluid storage chamber 90 that stores a fluid S such as oil. Although not shown, the damping device 80 is disposed between the foundation 14 and the upper structure 16 with the axis of the cylinder 86 as the horizontal direction.

  An insertion hole 92 serving as a guide mechanism is formed in an end plate 87 provided at an end portion in the axial direction of the cylinder 86, and the rod 30 is inserted into the insertion hole 92 so that it can be inserted and removed. A piston (pressing portion) 88 is provided at the tip of the rod 30. The piston 88 is disposed in the cylinder 86, and the piston 88 divides the fluid storage chamber 90 into two fluid storage chambers 90A and 90B. The piston 88 is provided with an orifice 94 that allows the fluid storage chamber 90A and the fluid storage chamber 90B to communicate with each other.

  The end of the rod 30 opposite to the piston 88 protrudes from the cylinder 86 and serves as a connecting portion (not shown) connected to the connecting portion 20 provided in the upper structure 16. On the other hand, a mounting portion 96 is provided on the end plate 89 provided at the end portion in the axial direction opposite to the end plate 89 of the cylinder 86. The mounting portion 96 and the like provided on the rod 30 and the end plate 89 are connected to the connecting portions 20 and 22 provided on the upper structure 16 and the base 14, respectively, similarly to the configuration shown in FIG. The piston 88 moves in the cylinder 86 with the relative movement between the upper structure 16 and the upper structure 16.

  A pair of stopper means 84 (two pairs in FIG. 4) are provided in the cylinder 86. The stopper means 84 is fixed to the end plates 87 and 89 of the cylinder 86, respectively. In addition, since the stopper means 84 is the structure similar to the stopper means 26 which concerns on 1st Embodiment, description is abbreviate | omitted. For convenience of explanation, the stopper means 84 fixed to the end plate 87 will be described as stopper means 84A, and the stopper means 84 fixed to the end plate 89 will be described as stopper means 84B.

  A piston 88 is disposed between the stopper means 84A and the stopper means 84B. Each stopper means 84A, 84B is provided with the pressed portion 58 opposed to the piston 88 and spaced from the piston 88 (gap H) in the initial state.

  Next, the operation of the second embodiment will be described.

  When an expected relative movement occurs between the foundation 14 and the upper structure 16 due to wind, an earthquake, or the like, the rod 30 is inserted into and removed from the cylinder 86, and the damping means 82 generates a damping force. Accordingly, the relative movement between the foundation 14 and the upper structure 16 is attenuated. On the other hand, when the relative movement amount between the foundation 14 and the upper structure 16 exceeds a predetermined value (gap H), the piston 88 provided at the tip of the rod 30 is pressed by either one of the stopper means 84A and 84B. The pressed part 58 is pushed into the cylinder 52 (see FIG. 3) side. As a result, the stopper means 84A or the stopper means 84B generates a greater damping force than the damping means 82, and the relative movement between the foundation 14 and the upper structure 16 is further damped.

In the present embodiment, direction stopper means 84A, for providing the piston 88 during 84B, the direction in which the rod 30 is inserted into the cylinder 86 (arrow _{B 1} direction) and that the rod 30 is withdrawn from the cylinder 86 ( be moved in either direction of the arrow B ₂ direction), the stopper means 84A, it is possible to generate a damping force to 84B. Specifically, the rod 30 and the foundation 14 in the direction (arrow B ₁ direction) to be inserted and the upper structure 16 moves relative to the cylinder 86, the relative movement amount becomes a predetermined value (clearance H) or Sometimes, the piston 88 as the pressing portion moved in the cylinder 86 presses the pressed portion 58 of the stopper means 84B to generate a damping force in the stopper means 84B. Conversely, when the rod 30 is the direction (the arrow B ₂ direction) to the foundation 14 and the upper structure 16 moves relative to removed from the cylinder 86, the relative movement amount becomes a predetermined value (clearance H) above, The piston 88 as the pressing portion that has moved in the cylinder 86 presses the pressed portion 58 of the stopper means 84A to cause the stopper means 84A to generate a damping force. In other words, even if the base 14 and the upper structure 16 move relative to each other in the axial direction of the rod 30, the piston 88 presses one of the pressed portions 58 of the stopper means 84A and 84B, and the stopper A damping force is generated in the means 84A or the stopper means 84B. Therefore, it is possible to suppress excessive deformation in both directions of the axis of the rod 30 of the foundation 14 and the upper structure 16 with one damping device 80.

  Further, by arranging the stopper means 26 in the cylinder 86, the external shape of the damping device 80 can be simplified. Therefore, the size of the attenuation device 10 can be reduced.

  In the present embodiment, two pairs of stopper means 84A and 84B are provided in the cylinder 86, but the present invention is not limited to this. There should be at least a pair of the stopper means 84A, 84B, and can be appropriately changed according to the required damping performance (braking performance). The pair of stopper means 84A and 84B may be on both sides with the piston 88 in between. Therefore, for example, a pair of stopper means 84A and 84B may be provided on the diagonal of the cylinder 86.

  Next, a third embodiment will be described. The same components as those in the first and second embodiments are denoted by the same reference numerals and will be appropriately omitted.

  FIG. 5 shows an attenuation device 100 according to the third embodiment. In the first and second embodiments, the pressed portion of the stopper means is provided in the cylinder of the damping means. In the third embodiment, the stopper means is provided outside the cylinder of the damping means. Specifically, the damping device 100 generates a damping force and attenuates the relative movement between the foundation 14 and the upper structure 16, and the relative movement amount between the foundation 14 and the upper structure 16 is a predetermined value. When it becomes above, it has the stopper means 84 which generate | occur | produces a damping force larger than the damping means 102 and functions as a shock absorbing material.

  The damping means 102 includes a cylinder 86, a rod 30 that is inserted into the cylinder 86 in a detachable manner, and a piston 88 and a pressing portion 104 provided on the rod 30. Although not shown, the damping device 100 is disposed between the foundation 14 and the upper structure 16 with the axis of the cylinder 86 as the horizontal direction.

  A pressing portion 104 is provided at a portion of the rod 30 protruding from the cylinder 86. The pressing portion 104 is formed in a disk shape and is fixed to the rod 30. A stopper means 84 is provided between the pressing portion 104 and the end plate 87. The stopper means 84 is fixed to the surface of the end plate 87 facing the pressing portion 104. Further, the stopper means 84 is provided with the pressed portion 58 facing the pressing portion 104 and is spaced from the pressing portion 104 of the damping means 102 in the initial state (gap H). When the amount of relative movement with the body 16 exceeds a predetermined value, the pressed portion 58 is pushed toward the cylinder 52 (see FIG. 3) by the pressing portion 104 that has moved together with the rod 30.

  Next, the operation of the third embodiment will be described.

  When an expected relative movement occurs between the foundation 14 and the upper structure 16 due to a wind, an earthquake, or the like, the rod 30 is inserted into and removed from the cylinder 86, and the damping means 102 generates a damping force. Accordingly, the relative movement between the foundation 14 and the upper structure 16 is attenuated. On the other hand, when the relative movement amount between the foundation 14 and the upper structure 16 exceeds a predetermined value (gap H), the pressing portion 104 provided on the rod 30 protruding from the end portion of the cylinder 86 becomes the pressed portion of the stopper means 84. 58, and the pressed part 58 is pushed into the cylinder 52 (see FIG. 3) side. As a result, the stopper means 84 generates a greater damping force than the damping means 102, and the relative movement between the foundation 14 and the upper structure 16 is further damped.

  Here, in this embodiment, since the stopper means 84 is provided outside the cylinder 28 of the damping means 24, the distance between the pressed portion 58 of the stopper means 84 and the pressing portion 104 can be easily adjusted. That is, the operation timing of the stopper means 84 can be easily adjusted. Further, since the stopper means 84 can be easily replaced, the maintainability of the damping device 100 is improved.

  Note that the pressing portion 104 can be moved along the axis of the rod 30, and the distance (gap H) between the pressed portion 58 and the pressing portion 104 can be adjusted by moving the pressing portion 104. May be. In the present embodiment, the two stopper means 84 are provided outside the cylinder 86, but the present invention is not limited to this. There may be at least one stopper means 84, which can be appropriately changed according to the required damping performance (braking performance).

  Next, a modification of the third embodiment will be described.

  FIG. 6 shows an attenuation device 110 according to this modification. The damping device 110 of the present modification is provided with stopper means 84 on the end plates 87 and 89 of the cylinder 86, respectively, and the base 14 and the upper structure 16 in both directions of the axis of the rod 30 with one damping device 110. It is configured to be able to suppress excessive deformation. Insertion holes 92 and 112 are formed in the end plates 87 and 89 of the cylinder 86, respectively. The rod 30 is inserted into the insertion holes 92 and 112, and the rod 30 passes through the cylinder 86. A piston 88 is provided at the axial center of the rod 30. The piston 88 is disposed in the cylinder 86, and partitions the fluid storage chamber 90 in the cylinder 86 into two fluid storage chambers 90A and 90B.

  Pressing portions 104 and 114 are provided at portions of the rod 30 protruding from the end plates 87 and 89 of the cylinder 86, respectively. The pressing portions 104 and 114 are formed in a disk shape and are fixed to the rod 30. As described above, the stopper means 84 (hereinafter referred to as “stopper means 84A”) is provided between the pressing portion 104 and the end plate 87. Similarly, a stopper means 84B is also provided between the pressing portion 114 and the end plate 89. The stopper means 84B is fixed to the surface of the end plate 89 facing the pressing portion 114. In addition, the stopper means 84B has the pressed portion 58 opposed to the pressing portion 114, and is provided with a space (gap H) between the pressing portion 114 in the initial state. When the amount of relative movement exceeds a predetermined value, the pressed portion 58 is pushed toward the cylinder 52 (see FIG. 3) by the pressing portion 104 moved together with the rod 30.

  A fixing member 116 is provided at the axially central portion of the cylinder 86. The fixing member 116 is formed in a ring shape, and a cylinder 86 is inserted therein. The fixing member 116 and the cylinder 86 are joined by unillustrated screw or welding. A mounting portion 116 </ b> A is provided below the fixing member 116. 116 A of attachment parts are attached to the connection part 22 of the foundation 14, and can rotate it making a vertical axis into a rotating shaft. Specifically, the attachment portion 116A is provided with a low friction part such as a bearing. On the other hand, the connecting portion 22 of the foundation 14 is provided with a rotating shaft 118 whose axis is the vertical direction. The mounting portion 116A is rotatably inserted into the rotating shaft 118, whereby the cylinder 86 is connected to the foundation 14 so as to be rotatable in a horizontal plane. As a result, when the upper structure 16 moves relative to the base 14 in two horizontal directions, for example, when the upper structure 16 moves relative to the direction orthogonal to the axis of the rod 30, the rod 30 is generated. The bending moment is suppressed.

  Next, the operation of this modification will be described.

In this modification, pressing portions 104 and 114 are provided at portions of the rod 30 protruding from the end plates 87 and 89 of the cylinder 86, respectively. Stopper means 84A and 84B are provided between the pressing portions 104 and 114 and the end plates 87 and 89, respectively. Therefore, the direction in which the rod 30 is inserted into the cylinder 86 (arrow B ₁ direction), and the direction and the base 14 to either direction (arrow B ₂ direction) and the upper structure 16 relative to the rod 30 is withdrawn from the cylinder 86 Even if it moves, a damping force can be generated in the stopper means 84A, 84B. Specifically, the rod 30 and the foundation 14 in the direction (arrow B ₁ direction) to be inserted and the upper structure 16 moves relative to the cylinder 86, the relative movement amount becomes a predetermined value (clearance H) or At that time, the pressing portion 104 moved together with the rod 30 is pressed by the pressed portion 58 of the stopper means 84A to generate a damping force on the stopper means 84A. Conversely, when the rod 30 is the direction (the arrow B ₂ direction) to the foundation 14 and the upper structure 16 moves relative to removed from the cylinder 86, the relative movement amount becomes a predetermined value (clearance H) above, The pressing portion 114 moved together with the rod 30 presses the pressed portion 58 of the stopper means 84B to generate a damping force in the stopper means 84B. In other words, even if the foundation 14 and the upper structure 16 move relative to each other in the axial direction of the rod 30, any one of the pressing portions 104 and 114 is pressed by the stopper means 84A or the stopper means 84B. The portion 58 is pushed to generate a damping force in the stopper means 84A or the stopper means 84B. Therefore, it is possible to suppress excessive deformation of the foundation 14 and the upper structure 16 in both directions of the axis of the rod 30 with one damping device 80.

  The pressing portions 104 and 114 need only be separated from the pressed portions 58 of the stopper means 84A and 84B by a predetermined distance (gap H) in the initial state, and the position of the rod 30 on which these pressing portions 104 and 114 are provided is It can be changed as appropriate. For example, in the configuration illustrated in FIG. 6, the pressing portion 114 is provided at the end of the rod 30, but the pressing portion 114 may be provided closer to the cylinder 86 than the end of the rod 30. Further, at least one stopper means 84A and 84B may be provided, and can be appropriately changed according to required damping performance (braking performance).

  Next, a fourth embodiment will be described. In addition, the thing of the same structure as 1st-3rd embodiment attaches | subjects the same code | symbol, and abbreviate | omits suitably and demonstrates.

  FIG. 7 shows an attenuation device 120 according to the fourth embodiment. In the fourth embodiment, the pressed portion 128 of the stopper means 126 is provided in the inner cylinder 124 of the damping means 122, and the fluid storage chamber 64 of the stopper means 126 is provided outside the inner cylinder 124. Specifically, the damping device 120 generates a damping force and attenuates the relative movement between the foundation 14 and the upper structure 16, and the relative movement amount between the foundation 14 and the upper structure 16 is a predetermined value. When it becomes above, it has two stopper means 126A and 126B which generate | occur | produce a damping force larger than the damping means 122 and function as a buffer material.

  The damping means 122 includes an inner cylinder 124, a rod 30 that is removably inserted into the inner cylinder 124, and a piston 88 provided on the rod 30. An outer cylinder 132 is provided outside the inner cylinder 124. The inner cylinder 124 and the outer cylinder 132 are formed in a cylindrical shape, and the inner cylinder 124 is disposed inside the outer cylinder 132. Although not shown, the damping device 120 is disposed between the foundation 14 and the upper structure 16 with the axes of the inner cylinder 124 and the outer cylinder 132 as horizontal directions.

  Inside the inner cylinder 124, two partition plates 134A and 134B are provided to partition the fluid storage chamber 90 of the damping means 122 and the space 54 of the stopper means 126A and 126B. A fluid S such as oil is accommodated in the fluid accommodation chamber 90 of the damping means 122. Insertion holes as guide mechanisms are respectively formed in the partition plates 134A and end plates 125 and 133 provided at axial ends of the inner cylinder 124 and the outer cylinder 132, and the rod 30 is inserted into these insertion holes. Inserted in a removable manner. The rod 30 is guided by these insertion holes, and the rod 30 is movable in the axial direction of the inner cylinder 124 and the outer cylinder 132. Although not shown, the insertion hole is provided with a seal member such as an O-ring that prevents fluid leakage.

  The piston 88 (pressing portion) provided at the tip of the rod 30 is disposed in the fluid storage chamber 90 of the damping means 122, and the piston 88 partitions the fluid storage chamber 90 into two fluid storage chambers 90A and 90B. It has been. The piston 88 is provided with an orifice 94 that allows the fluid storage chamber 90A and the fluid storage chamber 90B to communicate with each other.

  An end portion of the rod 30 opposite to the piston 88 protrudes from the outer cylinder 132 and serves as an attachment portion (not shown) connected to the connection portion 20 provided in the upper structure 16. On the other hand, an attachment portion 96 is provided on an end plate 135 provided at an end portion in the axial direction opposite to the end plate 133 of the outer cylinder 132. The attachment portion 96 and the like provided on the rod 30 and the end plate 135 are connected to the connection portions 20 and 22 provided on the upper structure 16 and the foundation 14 respectively, similarly to the configuration shown in FIG. The piston 88 moves in the cylinder 86 with the relative movement between the upper structure 16 and the upper structure 16.

  The rods 50 of the stopper means 126A and 126B are removably inserted into the insertion holes 138 formed in the partition plates 134A and 134B. The piston 62 provided at the end of the rod 50 is disposed in the space 54 of the stopper means 126A, 126B, and the piston 54 provides a fluid containing chamber 54A and an air chamber 54B in which the space 54 contains a fluid T such as oil. It is divided into.

  A pressed portion 128 is provided at the end of the rod 50 opposite to the piston 62. The pressed portion 128 is formed in a disc shape and is disposed in the fluid storage chamber 90 of the damping means 122. Between these pressed parts 128, the piston 88 of the damping means 122 is disposed. Each pressed portion 128 faces the piston 88 of the damping means 122 and is provided in the initial state with a gap (gap H) between the piston 88 of the damping means 122 and the relative relationship between the foundation 14 and the upper structure 16. When the movement amount exceeds a predetermined value, the piston 88 serving as a pressing portion moved in the inner cylinder 124 is pushed into the fluid storage chamber 54A. Further, an elastic body 60 made of a coil spring or the like is provided between the pressed portion 128 and each of the partition plates 134A and 134B, and the pressed portion 128 is moved to the piston 88 side of the damping means 122 by the elastic body 60. It is energized. The pressed portion 128 is formed with a through hole through which the rod 30 of the attenuation means 122 passes.

  A space between the outer peripheral surface of the inner cylinder 124 and the outer cylinder 132 and the inner peripheral surface is a fluid storage chamber 64 into which the fluid T stored in the fluid storage chamber 54A of the stopper means 126A and 126B flows. The inner cylinder 124 and the outer cylinder 132 are coupled by a ring-shaped rib 136 provided on the outer peripheral surface of the inner cylinder 124. The rib 136 divides the fluid storage chamber 64 into two.

  The end plates 125 and 127 and the side wall 124A of the inner cylinder 124 that partition the fluid storage chamber 64 and the fluid storage chamber 54A are formed with orifices 66 and 68 with check valves that communicate the fluid storage chamber 64 and the fluid storage chamber 54A. Has been.

  Next, the operation of the fourth embodiment will be described.

  When expected relative movement occurs between the foundation 14 and the upper structure 16 due to wind, earthquake, or the like, the rod 30 is inserted into and removed from the inner cylinder 124, and the damping means 122 generates damping force. Accordingly, the relative movement between the foundation 14 and the upper structure 16 is attenuated. On the other hand, when the amount of relative movement between the foundation 14 and the upper structure 16 exceeds a predetermined value (gap H), the piston 88 provided at the tip of the rod 30 is pressed by either one of the stopper means 126A and 126B. The pressed part 128 is pushed by the piston 88. As a result, the stopper means 126A or the stopper means 126B generates a greater damping force than the damping means 122, and the relative movement between the foundation 14 and the upper structure 16 is further damped.

Here, in this embodiment, the stopper means 126A, to provide the piston 88 during 126B, the direction in which the rod 30 is inserted into the inner cylinder 124 (arrow _{B 1} direction), and the rod 30 is withdrawn from the inner cylinder 124 be moved to any direction in the direction (arrow _{B 2} direction), the stopper means 126A, it is possible to generate a damping force to 126B. Specifically, the rod 30 and the foundation 14 in the direction (arrow B ₁ direction) to be inserted and the upper structure 16 moves relative to the inner cylinder 124, is the relative movement amount is a predetermined value (clearance H) or When this occurs, the piston 88 as the pressing portion that has moved in the inner cylinder 124 presses the pressed portion 128 of the stopper means 126B to generate a damping force in the stopper means 126B. Conversely, when the rod 30 direction is pulled out from the inner cylinder 124 into (arrow B ₂ direction) and the base 14 and the upper structure 16 and the relative movement, the relative movement amount becomes a predetermined value (clearance H) or The piston 88 as the pressing portion that has moved in the inner cylinder 124 presses the pressed portion 128 of the stopper means 126A to generate a damping force in the stopper means 126A. In other words, even if the base 14 and the upper structure 16 move relative to each other in the axial direction of the rod 30, the piston 88 presses one of the pressed portions 128 of the stopper means 126A and 126B, and the stopper A damping force is generated in the means 126A or the stopper means 126B. Therefore, it is possible to suppress excessive deformation of the foundation 14 and the upper structure 16 in both directions of the axis of the rod 30 with one damping device 120.

  In the present embodiment, the damping device 120 has a double structure of the inner cylinder 124 and the outer cylinder 132, and the fluid storage chamber 90 of the damping means 122 and the fluid storage chamber 64 of the stopper means 126A, 126B are arranged in the diameter of the inner cylinder 124. By adjoining in the direction, the axial length of the attenuation device 120 can be kept small. Therefore, the size of the attenuation device 120 can be reduced.

  In this embodiment, two stopper means 126A and 126B are provided, but one stopper means 126A and 126B may be omitted.

  In the first to fourth embodiments, fluids S and T such as oil are accommodated in the fluid storage chambers of the damping means and the stopper means, so-called oil dampers and oil buffers are configured. Instead of T, gas (air or the like) may be accommodated and a so-called air damper may be used. Moreover, although the elastic body 60 is provided in the stopper means, the elastic body 60 can be omitted as appropriate.

  Moreover, in the said 1st-4th embodiment, although the attenuation device was connected with the foundation 14 and the upper structure 16, it is not restricted to this. The attenuation device may be connected to two structures that move relative to each other. Moreover, you may provide a damping device not only in a base isolation layer but in an underground basic base isolation layer or an intermediate base isolation layer, for example. Furthermore, the damping device according to the first to fourth embodiments is not necessarily used in combination with the seismic isolation device. Furthermore, the attenuation devices according to the first to fourth embodiments are not necessarily arranged in the horizontal direction, and may be arranged in the vertical direction or the oblique direction.

  The first to fourth embodiments of the present invention have been described above. However, the present invention is not limited to such embodiments, and the first to fourth embodiments may be used in combination. Of course, various embodiments can be implemented without departing from the scope of the invention.

10 Damping device 14 Foundation (first structure)
16 Superstructure (second structure)
24 Damping means 26 Stopper means 28 Cylinder 30 Rod 32 Piston (pressing part)
48 Casing 58 Pressed part 80 Damping device 82 Damping means 84A Stopper means 84B Stopper means 86 Cylinder 88 Piston (pressing part)
DESCRIPTION OF SYMBOLS 100 Attenuator 102 Attenuator 104 Press part 110 Attenuator 114 Press part 120 Attenuator 122 Attenuator 124 Inner cylinder (cylinder)
126A Stopper means 126B Stopper means 128 Pressed portion S Fluid T Fluid

Claims (3)

A damping means provided between the first structure and the second structure that move relative to each other, and generates a damping force to attenuate the relative movement between the first structure and the second structure;
Stopper means provided between the first structure and the second structure, which generates a damping force larger than that of the damping means and suppresses relative movement between the first structure and the second structure. When,
Have
The damping means is
A cylinder containing fluid;
A rod that is inserted into the cylinder and is inserted into and removed from the cylinder as the first structure and the second structure move relative to each other;
A pressing portion that is provided on the rod and that generates a damping force by pressing a pressed portion provided on the stopper means when a relative movement amount between the first structure and the second structure exceeds a predetermined value;
An attenuation device comprising: The cylinder is coupled to the first structure;
The rod is connected to the second structure;
The pressing portion is disposed between a pair of the stopper means provided in the cylinder,
2. The damping device according to claim 1, wherein when the relative movement amount of the first structure and the second structure exceeds a predetermined value, one of the pressed portions of the pair of stopper means is pressed by the pressing portion. . The cylinder is coupled to the first structure;
The rod is connected to the second structure;
The pressing portion is provided on the rod penetrating the cylinder and projecting from both axial ends of the cylinder;
When the amount of relative movement between the first structure and the second structure exceeds a predetermined value, one of the pressed parts of the stopper means provided at both axial ends of the cylinder is caused by the pressing part. The damping device according to claim 1, which is pushed.

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