JP4684612B2 - 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 for preventing the 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 view of the above problems, the present invention is a rolling seismic isolation bearing device with a wind sway prevention function that can prevent wind swaying of a seismic isolation building due to strong winds and that can be realized in a small space. Etc. to be provided.

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 body provided with a recess at the tip thereof for rotatably holding the sphere,
A holding body guide part for holding the spherical body holding body in a vertically movable manner;
An advancing / retreating mechanism part that guides the spherical body holding body to the guide part and moves it back and forth in the vertical direction;
With
The ball holding body advances and retreats by the advance / retreat mechanism, and the ball holding body advances to the distal end side and is supported by the ball for rolling isolation, and the ball holding body retracts and holds the proximal end side. Rolling seismic isolation device with wind sway prevention function, wherein the wind sway prevention state where the tip of the body guide part is in contact with the receiving surface of the saucer is switched (first invention) Solved by.

  In this seismic isolation bearing device, the sphere holder is advanced from the holder guide part to the tip side so as to be in a rolling support state by the sphere, so that the upper structure part can be isolated in the event of an earthquake, and the sphere holder By retreating to the base end side so that the tip of the holding body guide portion is in contact with the receiving surface of the tray, the holding body guide portion and the receiving surface of the receiving tray are engaged, and the wind shaking prevention state is prevented. It is designed to prevent the seismic isolation building from shaking due to strong winds.

  Moreover, since the engagement for preventing the wind sway is performed by the engagement between the holding body guide part and the receiving surface of the tray, the space provided with the engaging part for preventing the wind sway is rolled. It is not necessary to secure it separately from the seismic isolation bearing device, and it is possible to prevent wind vibration in a space-saving manner. Also, in the rolling seismic isolation device, the planar size of the tray can be reduced, and the planar size of the rolling seismic isolation device can be made compact.

  In the first aspect of the invention, the advancing mechanism section may include a longitudinal seismic isolation mechanism that isolates a longitudinal vibration caused by an earthquake in a rolling seismic isolation state in which the spherical body is advanced to the tip side (second). invention).

  In this case, since the vertical vibration isolation mechanism is provided, both horizontal and vertical vibration isolation can be realized. Not only that, the sphere holding mechanism has a structure including a sphere holding body and a holding body guide that holds the sphere holding body so as to be movable in the vertical direction. Since it has a structure in which a pitch-isolation mechanism is formed using it, the pitch-isolation mechanism can be incorporated with a simple configuration.

In the second invention, the advance / retreat mechanism is
The holding body guide part is a cylinder, and the spherical body holding body is provided with a piston part that divides the inside of the cylinder into two chambers in the extending direction thereof, and a through hole that connects the two chambers to the piston part is provided,
A hydraulic pressure source that applies hydraulic pressure to both chambers through either or both chambers is provided, and the piston portion generates a forward output to the tip side due to the differential pressure of both chambers due to the hydraulic pressure from the hydraulic pressure source. Has been made, and
A switching means is provided for holding the piston part in the leading end side due to the differential pressure and releasing the holding state, and in a rolling seismic isolation state in which the spherical body holder is advanced and held in the tip side, pitching due to an earthquake is caused. Thus, it is preferable that the liquid in each chamber is made to come and go through the through-hole so as to isolate the pitching (third invention).

  In this case, not only can the spherical body be moved forward by the differential pressure of the hydraulic pressure acting on each chamber in the cylinder partitioned by the piston part to form a rolling seismic isolation support state, but also due to the differential pressure. Since the structure that uses the through hole that controls the advancement of the sphere holder for pitch isolation, the pitch can be isolated with a simple and rational structure.

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 structure 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. A rolling seismic isolation device (fourth invention) with a wind sway prevention function.

  In this device, the upper structure part can be isolated in the event of an earthquake by the separation and abutment between the wind vibration prevention mechanism and the receiving surface of the tray, and the wind vibration of the base isolation building due to strong winds can be prevented. In addition, it is not necessary to secure a space to provide an engaging part for wind sway prevention separately from the rolling seismic isolation device, and wind sway can be prevented in a space-saving manner. Also in the apparatus, the planar size of the tray can be reduced and the planar size can be made compact. That is, the fourth aspect of the present invention is not limited to a specific configuration for preventing the wind sway, and in short, the wind sway preventing state is formed by the engagement of the wind sway preventing mechanism and the receiving surface of the tray. It only has to be.

  Further, in the first to fourth inventions described above, when the receiving surface of the tray is a concave surface inclined toward the center (fifth invention), in the wind sway prevention state, it is possible to use the inclination of the receiving surface firmly. The engaged state can be formed.

Furthermore, the present application includes a seismic isolation device, a wind sway prevention device, a wind sensor, a wind power generator, a storage battery, and a control device.
The wind sway prevention device does not require a driving force to switch from the seismic isolation support state to the wind sway prevention state and does not require a driving force to switch from the wind sway prevention state to the seismic isolation device. It is made up of what you need and is driven by the electricity stored in the battery,
The wind power generator generates electricity with winds before and after the strong wind, and the generated electricity is stored in a storage battery.
During normal times when there is no earthquake or strong wind, the control unit keeps the superstructure in a state of seismic isolation, and the wind sway prevention device is swayed from the state of seismic isolation based on the signal from the wind sensor during strong winds. The seismic isolation system with wind sway prevention function (No. 6) is configured to control the wind sway prevention device to return to the seismic isolation state by electricity of the storage battery when the strong wind stops. Invention).

  In this system, in the control configuration that keeps the upper structure in a seismic isolation state in normal times when there is no earthquake and no strong wind, the driving force for returning from the wind sway prevention state due to the strong wind to the seismic isolation state after the strong wind Is generated using wind power just before and after strong winds, and it is generated by using short-term electricity. Reliable operation can be ensured.

  Since the present invention is as described above, it is possible to prevent the seismic isolation building from being swayed by strong winds, and to achieve this in a space-saving manner.

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

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

  The sphere holding mechanism unit 3 includes a wind sway prevention device, and includes a sphere holding body 7, a holding body guide unit 8, and an advance / retreat mechanism unit 9. The spherical body holding body 7 includes a recess 7a that rotatably holds the spherical body 2 on the lower surface portion that is a tip portion thereof, and the spherical body 2 receives the receiving of the receiving tray 4 while receiving a rotation holding action in the concave portion 7a. It rolls on the surface 4a.

  The holding body guide portion 8 guides and holds the spherical body holding body 7 so as to be movable in the vertical direction. The holding body guide portion 8 includes a guide hole 8a, and the spherical body holding body 7 is accommodated in the guide hole 8a so as to be vertically moved. It is held movably in the direction.

  The advancing / retreating mechanism unit 9 moves the sphere holding body 7 guided by the holding body guide unit 8 in the up-and-down direction. As shown in FIG. The rolling support state for seismic isolation 7 is advanced to the distal end side and supported by the sphere 2, and as shown in FIG. 3 (b), the sphere holder 7 moves backward to the proximal end side and the holder guide portion The wind sway prevention state in which the front end portion of 8 is in contact with the receiving surface of the tray 4 can be switched.

  Specifically, the advancing / retreating mechanism portion 9 of the present embodiment uses the holding body guide portion 8 as a cylinder, and divides the spherical body holding body 7 into two chambers 10 and 11 in a guide hole 8a that is a cylinder in the extending direction. A piston portion 7b is provided, and through holes 12 and 12 for communicating the two chambers 10 and 11 with the piston portion 7b are provided. The lower chamber 11 is separated from the outside by a sphere holding main body portion 7 c of the sphere holding body 7.

  A hydraulic pump 13 as a hydraulic pressure source is connected to the lower chamber 11, and the piston portion 7 b is moved to the distal end side, that is, downward by the differential pressure between the two chambers 10 and 11 generated by the pressure oil sent from the pump 13. The sphere holder 7 can be moved forward to the tip side by the advance output to form a base-isolation support state, and the sphere holder 7 can be retracted upward by releasing the hydraulic pressure. Therefore, it is possible to form a wind sway prevention state. The pump 13 may or may not be included in the holding body guide portion 8 in an assembled state.

  As a switching means for that purpose, a first valve 14 is provided on the side of the holding body guide portion 8, and when the first valve 14 is opened and the pump 13 is driven, the spherical body holding body 7 advances downward to avoid rolling. A seismic support state is formed, and in the advanced state, the first valve 14 is closed, so that the pump 13 is stopped and the rolling seismic support state is maintained. The oil in the chambers 10 and 11 is removed, and the sphere holder 7 is retracted upward to form a wind sway prevention state. Reference numeral 17 denotes a sub tank.

  Further, a spring 16 as an urging means is provided in the upper chamber 10 so that the sphere holder 7 is urged in the advance direction, and the sphere holder 7 is advanced with a small hydraulic pressure. It has been made so that it can.

  Then, in the rolling support state in which the spherical body holding body 7 is advanced and held at the tip side, the oil in the chambers 10 and 11 is made to come and go through the through-holes 12 due to the vertical vibration caused by the earthquake, and the vertical vibration isolation mechanism is It is configured. By providing the second valve 15 in the through hole 12 and opening and closing the second valve 15, it is possible to allow or prevent the oil from passing through the through hole 12, or to pass the oil. It is preferable that the flow rate can be adjusted.

  In the rolling seismic isolation device 1 described above, during normal times when there is no strong wind and no earthquake, as shown in FIG. When a rolling earthquake occurs, the upper structure 6 of the building is isolated.

  When this earthquake is accompanied by pitching, as shown in FIG. 4 (a), by keeping the through-hole 12 open, oil can come and go through the two chambers 10 and 11 to avoid pitching. It is shaken.

  In the present embodiment, since the receiving surface 4a of the tray 4 is inclined, as shown in FIG. 4 (b), the sphere 2 moves up and down on the receiving surface 4a of the tray 4 during a rolling earthquake. By the oil coming and going between the two chambers 10 and 11, the vertical vibration of the upper structure 6 is also isolated.

  Further, in the above-described rolling support state, it is possible to close the through hole 12 with the second valve 15 and to control the opening of the second valve 15 in the event of an earthquake. In this case, it is possible to eliminate the unintentional movement of the upper structure 6 in the vertical direction during normal times when there is no earthquake or strong wind.

  When the strong wind blows, the first valve 14 opens, the sphere holder 7 moves backward, and the tip of the holder guide 8 contacts the receiving surface 4a of the tray 4 as shown in FIG. Thus, the wind sway is prevented and the upper structure 6 is prevented from rolling due to the strong wind. In the present embodiment, since the receiving surface 4a of the receiving tray 4 has a spherical concave surface and is inclined toward the center, the receiving tray 4 and the holding body guide portion 8 are used to prevent wind fluctuations using the inclination. Can be in a tightly engaged state.

  The switching control of the state of the rolling seismic isolation device 1 with wind sway prevention function is performed by the control device 18 as shown in FIG. 1 (a). A wind power generator 19 having a function as a wind sensor and a storage battery 20 for storing generated electricity are provided. When a strong wind of a certain level or more blows, the wind power generator 19 detects it and performs control to open the first valve 14, and the wind power generator 19 generates power using the strong wind or wind power before and after that. Then, when the electricity is stored in the storage battery 20 and the wind stops, the control device 18 sends a drive signal to the pump 13 and the pump 13 is driven by the electricity stored in the storage battery 20 to automatically return to the rolling support state. It is made to do.

  By doing so, it is possible to ensure a highly reliable operation by eliminating the occurrence of problems in the operation due to the electric power outage of the storage battery 20 while having a control configuration using natural energy by wind power generation.

  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 pump 13 is connected to the lower chamber 11. However, the pump 13 may be connected to the upper chamber 10 or may be connected to the upper and lower chambers 10 and 11. It may be. Moreover, in said embodiment, although the case where the spherical body holding | maintenance mechanism part 3 is provided in the side of the upper structure part 6 and the saucer 4 is provided in the side of the foundation 5 as a lower structure part is shown, Good. Moreover, you may make a normal state into a wind-swing prevention state.

FIG. 1A is a cross-sectional front view showing a rolling seismic isolation bearing device with a wind sway prevention function of an embodiment, and FIG. It is a disassembled sectional front view of an apparatus. Fig. 1 (a) is a cross-sectional front view showing the state of the device during a rolling earthquake, and Fig. (B) is a cross-sectional front view showing the operation state of the device during strong winds. Fig. 1 (a) is a sectional front view showing the operating state of the apparatus during a pitching earthquake, and Fig. (B) is a sectional front view showing the operating state in which the vertical movement due to rolling is absorbed.

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 body 7b ... Piston part 8 ... Holding body guide part (cylinder)
9 ... Advance / retreat mechanism 10 ... Upper chamber 11 ... Lower chamber 12 ... Through hole 13 ... Pump (hydraulic pressure source)
14 ... 1st valve (switching means)
18 ... Control device 19 ... Wind power generator with wind sensor 20 ... Storage battery

Claims (4)

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
A sphere holding body provided with a recess at the tip thereof for rotatably holding the sphere,
A holding body guide part for holding the spherical body holding body in a vertically movable manner;
An advancing / retreating mechanism part that guides the spherical body holding body to the guide part and moves it back and forth in the vertical direction;
With
The ball holding body advances and retreats by the advance / retreat mechanism, and the ball holding body advances to the distal end side and is supported by the ball for rolling isolation, and the ball holding body retracts and holds the proximal end side. A rolling seismic isolation device with a wind sway prevention function, wherein the wind sway prevention state in which the tip of the body guide part abuts against the receiving surface of the tray is switched.   The said advancing mechanism part is equipped with a wind sway prevention function according to claim 1, comprising a longitudinal seismic isolation mechanism that isolates a longitudinal motion caused by an earthquake in a rolling seismic isolation state in which the spherical body is advanced to the tip side. Rolling isolation device. The advance / retreat mechanism is
The holding body guide part is a cylinder, and the spherical body holding body is provided with a piston part that divides the inside of the cylinder into two chambers in the extending direction thereof, and a through hole that connects the two chambers to the piston part is provided,
A hydraulic pressure source that applies hydraulic pressure to both chambers through either or both chambers is provided, and the piston portion generates a forward output to the tip side due to the differential pressure of both chambers due to the hydraulic pressure from the hydraulic pressure source. Has been made, and
A switching means is provided for holding the piston part in the leading end side due to the differential pressure and releasing the holding state, and in a rolling seismic isolation state in which the spherical body holder is advanced and held in the tip side, pitching due to an earthquake is caused. 3. The rolling seismic isolation device with wind sway prevention function according to claim 2, wherein the liquid in each chamber is made to come and go through a through hole so as to isolate the pitching . 4. The rolling seismic isolation device with wind sway prevention function according to any one of claims 1 to 3 , wherein the receiving surface of the tray is a concave surface inclined toward the center .

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