JP4460410B2 - Rolling seismic isolation device with wind sway prevention function - Google Patents

Description

  The present invention relates to a rolling seismic isolation device with a wind sway prevention function.

  In a base-isolated building using a rolling base-isolated bearing, if the building is subjected to strong winds, the superstructure may move and shake when the building receives strong winds. It incorporates a wind sway prevention device that is fixed to the lower structure and prevents the building from swaying.

  However, in the conventional wind sway prevention device, the engagement mechanism part for preventing wind sway is provided separately from the seismic isolation support device, and the building has a space for incorporating the seismic isolation support device and the wind sway fixing device. It was necessary to secure both spaces for incorporating the engagement mechanism portion.

  In addition, it is conceivable to incorporate the engagement mechanism portion of the wind sway prevention device into the seismic isolation support device, but if the pin insertion type engagement mechanism portion is incorporated around the receiving surface of the spherical tray, the plane of the tray The size must be increased, the planar size of the seismic isolation bearing device will be increased, and the mechanism will become complicated if engagement parts are provided at multiple locations in order to create a stable wind sway prevention state. There is also a problem of end.

  In view of the above-described problems, the present invention can form a mechanically stable wind sway prevention state, and can also realize it with a space-saving, compact and simple structure. It is an object of the present invention to provide a function-equipped rolling seismic isolation device.

The above challenges are
A sphere holding mechanism that is provided in either one of the upper and lower structures and holds the sphere rotatably;
It is provided on the other of the upper and lower structure parts, and is provided with a saucer that receives the sphere so as to roll,
The spherical body holding mechanism section is
A sphere holding portion provided with a recess at the tip thereof for holding the sphere rotatably;
An advancing / retracting operation body for preventing wind fluctuations, which is guided and held by a spherical body holding portion so as to be movable back and forth in a vertical direction above the receiving surface of the tray;
An advancing / retreating mechanism for controlling the operation of the advancing / retracting body;
With
By controlling the operating state of the advancing / retracting mechanism by the advancing / retracting mechanism, the advancing / retreating actuator is advanced to the distal end side, and the distal end is in contact with the receiving surface of the tray, preventing the wind from moving backward. A rolling seismic isolation device with a wind sway prevention function, which can be switched between a state and a rolling support state by a sphere for seismic isolation in which the wind sway prevention state by the advancing / retreating operating body is released Solved by.

  In this seismic isolation bearing device, the advancing / retreating operation body is retracted from the spherical body holding part to the base end side to be in a rolling support state by the spherical body, so that the upper structure can be isolated from the earthquake and the advancing / retreating operation body can be By advancing to the front end side and bringing the front end portion into contact with the receiving surface of the tray, the advancing / retreating operation body and the receiving surface of the receiving tray are engaged to form a wind sway prevention state. It can prevent the seismic isolation building from shaking due to strong winds.

  In addition, since the engagement for preventing the wind vibration is performed by the engagement between the advancing / retreating operation body and the receiving surface of the tray, the space provided with the engaging portion for preventing the wind vibration is rolled to avoid the rolling. It is not necessary to secure it separately from the seismic bearing device, and wind shaking can be prevented in a space-saving manner. In addition, in the rolling seismic isolation device, the planar size of the tray can be reduced, the planar size of the rolling seismic isolation device can be made compact, and the force acting part for preventing wind vibration Is within the receiving surface of the tray, so that a mechanically stable wind sway prevention state can be realized with a simple structure.

  Further, in the above apparatus, when the receiving surface of the tray is a concave surface inclined toward the center, a firm engagement state can be formed by utilizing the inclination of the receiving surface in the wind shaking prevention state. it can.

Furthermore, in the above apparatus, the spherical body holding mechanism part is provided on the upper structure part side, and the tray is provided on the lower structure part side,
The receiving surface of the saucer consists of a concave surface inclined toward the center,
The advancing / retracting body is designed so that its tip is always supported on the receiving surface of the tray by its own weight,
The advancing / retreating mechanism section includes a wind-swing-preventing state in which the advancing / retreating operating body supported on the receiving surface of the tray is prevented from moving upward, and a rolling seismic isolation supporting state in which the advancing / retreating operating body is allowed to move upward It is also possible to have a structure for switching between and.

  In this device, the advancing / retracting operation body is always supported on the receiving surface of the receiving pan, and it is not necessary to adopt a drive configuration that actively moves the advancing / retreating operation body by hydraulic pressure or the like. The mechanism portion can be configured simply. If necessary, an urging means such as a spring for urging the advance / retreat operating body downward may be provided to compensate for its own weight.

In addition, the sphere holding mechanism part is provided on the upper structure part side, the saucer is provided on the lower structure part side,
The receiving surface of the saucer consists of a concave surface inclined toward the center,
The advancing / retracting body is biased toward the receiving surface of the tray by biasing means such as its own weight,
The advancing / retreating mechanism section includes a wind-swing-preventing state in which the advancing / retreating operating body supported on the receiving surface of the tray is prevented from moving upward, and a rolling seismic isolation supporting state in which the advancing / retreating operating body is allowed to move upward And the advancing / retracting body that has been lifted by the inclination of the receiving surface due to vibration such as an earthquake in a rolling seismic isolation state is held in the ascending position. It may be configured to return to an initial state in contact with the receiving surface of the tray.

  In this case, during the seismic isolation, the contact between the advancing / retreating operating body and the receiving surface of the tray can be suppressed, and the wear of the tip of the advancing / retreating operating body can be reduced.

The present invention also includes a sphere,
A sphere holding mechanism that is provided in either one of the upper and lower structures and holds the sphere rotatably;
It is provided on the other of the upper and lower structural parts, and is provided with a saucer that receives the sphere so as to roll,
The spherical body holding mechanism portion is provided with a wind sway prevention mechanism portion that forms a rolling support state by a sphere by separating from the receiving surface of the tray, and forms a wind sway prevention state by contacting the receiving surface of the tray. Including a rolling seismic isolation device with wind sway prevention function.

  Also in this apparatus, the wind sway prevention state is formed by the engagement of the wind sway prevention mechanism part and the receiving surface of the tray, and a mechanically stable wind sway prevention state can be formed. It can be realized with a compact and simple structure in space.

  Since the present invention is as described above, a mechanically stable wind sway prevention state can be formed, and it can be realized with a space-saving, compact and simple structure.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  In the rolling seismic isolation device 1 with wind sway prevention function of the embodiment shown in FIG. 1, 2 is a rolling sphere made of a steel ball or the like, 3 is a sphere holding mechanism, 4 is a tray, and the tray 4 is a building The upper structure portion of the building is provided in a fixed state with the receiving surface 4a facing upward on the side of the foundation 5 as the lower structure portion, and the spherical body holding mechanism portion 3 faces the receiving surface 4a of the receiving tray 4 in the vertical direction. 6 is fixed in a downward direction on the side.

  The sphere holding mechanism unit 3 includes a sphere holding unit 7, an advance / retreat operating body 8, and an advance / retreat mechanism unit 9.

  The spherical body holding portion 7 is provided with a recess 7a that rotatably holds the spherical body 2 on the lower surface portion that is the tip thereof, and the spherical body 2 receives the receiving of the tray 4 while receiving a rotation holding action in the concave portion 7a. It rolls on the surface 4a.

  The spherical body holding portion 7 also has a function of guiding and holding the advancing / retracting operation body 8 so as to be movable in the vertical direction, and includes a circular guide hole 7b opened downward in the periphery of the recess 7a. Since the cylindrical advance / retreat operating body 8 is accommodated and disposed in the guide hole 7b, the advance / retreat operating body 8 is held movably in the vertical direction above the receiving surface 4a of the tray 4.

  The advancing / retreating mechanism unit 9 is responsible for switching the operating state of the advancing / retreating operating body 8 guided by the spherical body holding unit 7 in the vertical direction. As shown in FIG. As shown in FIG. 2 (b), the advancing / retreating operating body 8 advances downward and the tip portion thereof is in contact with the receiving surface 4a of the receiving tray 4 and the upward movement is prevented. The advancing / retracting operation body 8 can be switched between a rolling support state in which the advancing / retracting body 8 is allowed to retreat upward.

  Specifically, in this embodiment, the advancing / retreating operating body 8 is in a state of being in contact with and supported by the receiving surface 4a of the receiving tray 4 by its own weight. A hydraulic pump 11 as a hydraulic pressure source is connected to the chamber 10 on the proximal end side of the advancing / retreating operating body 8 with the guide hole 7b of the holding part 7 as a cylinder hole, and a sub-tank 12 for pressure release is connected to the chamber 10 Has been. A check valve 14 is provided between the chamber 10 and the hydraulic pump 11 to allow only a flow in the oil feeding direction, and the chamber 10 and the sub tank 12 are normally closed. An opening / closing valve 13 with a seismic function that opens when an earthquake is detected is provided.

  In the above-described rolling seismic isolation device 1 with wind sway prevention function, the pump 11 is driven with the open / close valve 13 closed, and the pressure in the chamber 10 is increased to contact the receiving surface 4a of the tray 4. The state in which the forward / backward moving body 8 is prevented from moving upward is set. This state is the initial state, and this state is maintained during normal times when there is no strong wind and no earthquake.

  In this state, as shown in FIG. 2 (a), when the strong wind blows, the advance / retreat operating body 8 restricts the upward movement of the receiving tray 4 from the receiving surface 4a. The concave spherical receiving surface 4a is strongly engaged in the horizontal direction, and the rolling of the upper structure portion 6 due to the strong wind is prevented rather than the relative movement in the horizontal direction.

  In addition, as shown in FIG. 2B, when an earthquake occurs, the opening / closing valve 13 is opened, the inside of the chamber 10 is opened, and the advancing / retreating operation body 8 is allowed to move in the vertical direction, thereby preventing wind fluctuation. The state is released, and the upper structure portion 6 of the building is seismically isolated by rolling the sphere 2.

  As described above, according to the above-described rolling seismic isolation device 1 with a wind sway prevention function, the rolling seismic isolation state and the wind sway prevention state are successfully switched to appropriately prevent the wind sway of the base isolation building due to strong winds. can do.

  In addition, since the engagement for preventing the wind sway is performed by the engagement of the advance / retreat operating body 8 and the receiving surface 4a of the receiving tray 4, a space for providing an engaging part for preventing the wind sway. The seismic isolation device 1 does not need to be secured separately, and the wind fluctuation can be prevented in a space-saving manner. Also, in the rolling isolation device 1, the planar size of the tray 4 can be reduced. In addition, the plane size of the rolling seismic isolation device 1 can be made compact, and furthermore, the force acting part for preventing the wind sway is in the receiving surface 4a of the tray 4 so that it is mechanically stable. It is possible to realize a wind shaking prevention state with a simple structure.

  In the above-described embodiment, the advance / retreat operating body 8 is always brought into contact with and supported by the receiving surface 4a of the receiving tray 4 by its own weight. Since the configuration does not have to be taken, the advancing / retreating mechanism unit 9 can have a simple structure.

  In this way, during vibration such as an earthquake, the tip of the advancing / retreating operating body 8 is always in contact with the receiving surface 4a of the receiving tray 4 and slides in contact with the receiving surface 4a. When the advancing / retracting operation body 8 rises with the inclination of the receiving surface 4a by the first shaking, the descent becomes slow due to the action of the diaphragm, and the rising position is substantially maintained during vibration such as an earthquake. For example, after 30 minutes have passed since the end of the earthquake, control may be performed such that the tip of the advancing / retreating operating body 8 comes into contact with the receiving surface 4a to return to the initial state. In that case, the wear of the tip of the advancing / retreating operating body 8 due to vibration such as an earthquake can be kept small.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the above embodiment shows a case where the spherical body holding mechanism portion 3 is provided on the upper structure portion 6 side and the tray 4 is provided on the base 5 side as the lower structure portion. Or vice versa. In the reverse case, it is preferable that the advance / retreat operating body is always brought into contact with the receiving surface of the tray by a biasing means such as a spring. The drive mechanism may be moved up and down to switch between the wind sway prevention state and the rolling seismic isolation support state. Further, in the above embodiment, the case where the device 1 is held in the wind shaking prevention state in the normal state where there is no strong wind or earthquake is shown. However, in the normal state, the device 1 is rolled and held in the seismic isolation support state. Also good. Further, the wind sway prevention state may be formed by the frictional force when the advancing / retreating operating body is strongly brought into contact with the receiving surface of the tray.

It is a cross-sectional front view which shows the rolling seismic isolation apparatus with a wind-swing prevention function of embodiment. Fig. 1 (a) is a cross-sectional front view showing an operating state during a strong wind, and Fig. (B) is a cross-sectional front view showing an operating state during an earthquake.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Seismic isolation support apparatus 2 ... Sphere 3 ... Sphere holding | maintenance mechanism part 4 ... Receptacle 4a ... Receiving surface 5 ... Foundation (lower structure part)
6 ... Upper structure part 7 ... Sphere holding part 8 ... Advancing / retracting body 9 ... Advancing / retreating mechanism part

Claims (3)

A sphere,
A sphere holding mechanism that is provided in either one of the upper and lower structures and holds the sphere rotatably;
It is provided on the other of the upper and lower structure parts, and is provided with a saucer that receives the sphere so as to roll,
The spherical body holding mechanism section is
Rutotomoni comprises a recess for rotatably holding the sphere tip, the ball holding portion having an annular guide hole disposed concentrically around part of the recess,
An advancing / retracting action body for preventing wind sway , which has a cylindrical shape and is guided and held so as to be movable back and forth in an up-down direction by being housed and arranged in an annular guide hole of the spherical body holding portion ;
An advancing / retreating mechanism for controlling the operation of the advancing / retracting body;
With
The receiving surface of the saucer has a concave spherical shape inclined toward the center,
The advancing / retracting operation body is adapted to abut on the receiving surface of the saucer around the sphere by advancing to the distal end side with the sphere positioned at the center of the receiving surface of the saucer. At the same time, the backward movement to the proximal end side is prevented in the corresponding contact state, so that it receives the action of the shape of the concave spherical surface and engages with the receiving surface of the tray to form a wind sway prevention state. And
By controlling the operating state of the forward and backward actuating member by the reciprocating mechanism, wind sway was prevented retraction of the receiving surface of the distal end portion forward and backward actuating member is advanced to the distal end side pan proximally while abutting Rolling-isolated bearing with wind-swing-preventing function, characterized in that it can be switched between a blocking state and a rolling-supported state using a sphere for seismic isolation when the wind-swing-preventing state is released Equipment . The spherical body holding mechanism part is provided on the upper structure part side, and the tray is provided on the lower structure part side ,
The advancing / retracting body is designed so that its tip is always supported on the receiving surface of the tray by its own weight,
The advancing / retreating mechanism section includes a wind-swing-preventing state in which the advancing / retreating operating body supported on the receiving surface of the tray is prevented from moving upward, and a rolling seismic isolation supporting state in which the advancing / retreating operating body is allowed to move upward The rolling seismic isolation device with a wind sway prevention function according to claim 1, wherein the rolling seismic support device has a structure for switching between. The spherical body holding mechanism part is provided on the upper structure part side, and the tray is provided on the lower structure part side ,
The advancing / retracting body is biased toward the receiving surface of the tray by biasing means such as its own weight,
The advancing / retreating mechanism section includes a wind-swing-preventing state in which the advancing / retreating operating body supported on the receiving surface of the tray is prevented from moving upward, and a rolling seismic isolation supporting state in which the advancing / retreating operating body is allowed to move upward And the advancing / retracting body that has been lifted by the inclination of the receiving surface due to vibration such as an earthquake in a rolling seismic isolation state is held in the ascending position. The rolling seismic isolation bearing device with a wind sway prevention function according to claim 1, wherein the rolling seismic support device has a structure for returning to an initial state in contact with the receiving surface of the tray.

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