JP2011106515A - Base isolation/vibration control mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base isolation/vibration control mechanism disposed at a structural body, suitable for optimizing base isolation/vibration control performance by simple structure. <P>SOLUTION: The base isolation/vibration control mechanism includes: a damper 100 having a linearly moving shaft 110, a rotor 120 guided by a spiral groove G of the linearly moving shaft 110, and a frame 130; and a pair of connecting members 210, 220 connecting the linearly moving shaft 110 and the frame 130 at a pair of connection portions. At least one connecting member 210 restrains specific relative displacement between one of the linearly moving shaft 110 or the frame 130 and the connection portion by a specific force to allow the specific relative displacement when a force exceeding the specific force acts on the connection portion. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a seismic isolation mechanism provided in a building.

When an earthquake occurs, structures such as buildings and structures are shaken horizontally and vertically.
When the acceleration level due to an earthquake or the like is large, the structure is damaged, or an object in the structure receives an acceleration exceeding an expectation or a displacement exceeding the expectation.
Therefore, a seismic isolation device that reduces the vibration energy transmitted from the foundation to the structure to isolate the vibration, or a vibration suppression that absorbs the vibration energy and reduces the vibration level when the structure vibrates. Devices of various structures have been tried as devices.
By appropriately setting the specifications of the structure and the elements constituting the structure, desired seismic isolation performance and damping performance can be exhibited.

For this purpose, a damper having a conversion mechanism between rotational motion and linear motion is used.
For example, the damper includes a friction damper, a viscous damper, a mass damper, a viscous mass damper, a tuned viscous mass damper, and the like.

The friction damper includes a linear motion shaft provided with a spiral groove having a predetermined lead along the longitudinal direction, a rotating body guided along the spiral groove, and a frame that rotatably supports the rotating body.
The friction damper has a damping coefficient c corresponding to a value obtained by dividing the reaction force acting when the linear motion shaft is linearly displaced at a constant relative speed by the relative speed due to friction.

The viscous damper includes a linear motion shaft provided with a spiral groove having a predetermined lead along the longitudinal direction, a rotating body guided along the spiral groove, a frame that rotatably supports the rotating body, an inner surface of the frame, and rotation. It is composed of a viscous fluid enclosed in a gap with the body.
The viscous damper has a damping coefficient c corresponding to a value obtained by dividing the reaction force acting when the linear motion shaft is linearly displaced at a constant relative speed by the relative speed due to the viscosity.

The mass damper includes a linear motion shaft provided with a spiral groove having a predetermined lead along the longitudinal direction, a rotating body guided along the spiral groove, and a frame that rotatably supports the rotating body.
The mass damper is an apparent value obtained by dividing the reaction force acting when the linear motion shaft is linearly displaced at a predetermined relative acceleration due to the rotational inertia moment of the rotating body by the relative acceleration of the linear motion displacement. It has an inertial mass mr.

The viscous mass damper includes a linear motion shaft provided with a spiral groove having a predetermined lead along the longitudinal direction, a rotating body guided along the spiral groove, a frame that rotatably supports the rotating body, an inner surface of the frame, It is comprised with the viscous fluid enclosed with the clearance gap between rotating bodies.
The viscous mass damper is an apparent value obtained by dividing the reaction force acting when the linear motion shaft is linearly displaced at a predetermined relative acceleration due to the viscosity and rotational moment of inertia by the relative acceleration of the linear motion displacement. It has an inertial mass mr and a damping coefficient c corresponding to a value obtained by dividing the reaction force acting when the linear motion shaft is linearly displaced at a constant relative velocity by the relative velocity.

The tuned viscous mass damper is obtained by connecting an elastic body in series to a viscous mass damper.
The tuned viscous mass damper has the elastic coefficient kb, which is a value obtained by dividing the reaction force generated when the spring element is displaced by a relative distance in the linear motion direction, and the linear motion axis of the viscous mass damper in the linear motion direction. The damper natural frequency ωr corresponding to the apparent inertia mass mr, which is a value obtained by dividing the reaction force acting in the linear motion direction when the linear motion is performed at a predetermined relative acceleration, and the linear motion axis of the viscous mass damper And a damping coefficient c corresponding to a value obtained by dividing the reaction force acting in the linear motion direction by the relative velocity when the lens is linearly moved at a constant relative velocity.

When the linear motion shaft is linearly displaced, the rotating body rotates.
A rotational reaction force corresponding to the rotational inertia ratio of the rotating body is generated. The rotational reaction force is converted into a reaction force in the direction of linear displacement by the action of the spiral groove and the rotating body.
When the rotating body rotates, a shearing force is generated in the viscous fluid enclosed in the gap between the rotating body and the frame, and a rotational reaction force corresponding to the shearing force is generated. The rotational reaction force is converted into a reaction force in the direction of linear displacement by the action of the male screw and the female screw.
The reaction force due to the inertial force and the shearing force has a dynamic characteristic combined with a large apparent mass and a large damping compared with the mass of the rotating body and the amount of the viscous fluid.
Since the viscous mass damper and the elastic body are connected in series, it has dynamic characteristics combined with a large apparent mass and a large damping.

  By connecting these dampers to the structure and making the natural frequency of the structure and the natural frequency of the tuned viscous mass damper an appropriate relationship, the inventors are able to efficiently isolate and suppress the structure. I found.

When an earthquake does not occur, the structure is shaken by a force such as wind, and the structure is slightly shaken corresponding to the natural frequency of the structure.
When an earthquake occurs, the structure is forcibly shaken by the acceleration of the ground, and the structure shakes greatly in response to the excitation force of the earthquake.
Therefore, the optimal characteristics of the damper may differ between when the structure is shaken slightly without an earthquake and when the earthquake occurs and the structure is shaken.

Further, as a structural feature of the damper, when the speed and acceleration of the linear movement of the linear motion body increase, a large reaction force is generated at the linear motion shaft or at the connecting portion between the frame and the structural body.
Even when an unexpectedly large speed or acceleration is applied to the damper when an earthquake occurs, it may be desired to prevent a large reaction force from being generated at the connecting portion.

  The present invention has been devised in view of the above-described problems, and intends to provide a seismic isolation mechanism provided in a structure suitable for optimizing seismic isolation / damping performance with a simple configuration. .

  In order to achieve the above object, a seismic isolation mechanism provided in a structure having a pair of connecting points that are displaced relative to a swing according to the present invention is provided with a spiral having a predetermined pitch along the longitudinal direction on the outer peripheral surface. A damper having a linear motion shaft that is a shaft body provided with a spiral groove that is a groove, a rotating body that is guided along the spiral groove, and a frame that rotatably supports the rotating body; A pair of connecting members for connecting the linear motion shaft and the frame to each other at a connection location, wherein at least one of the pair of connection members is the linear motion shaft or the frame A specific relative displacement, which is a specific relative displacement between one of the linear movement shaft and the connecting portion to which one of the frames is connected, is limited by a specific force, which is a specific force, and the linear movement shaft or One of the frames is connected Force exceeding the specific force in the serial connection points allows the specific relative displacement to act, and the things.

According to the configuration of the present invention, the damper is guided along the linear motion shaft that is a shaft body provided with a spiral groove that is a spiral groove having a predetermined pitch along the longitudinal direction on the outer peripheral surface and the spiral groove. And a frame that rotatably supports the rotating body. A pair of connecting members connect the linear motion shaft and the frame to a pair of connecting portions, respectively. Identification of at least one of the pair of connecting members between one of the linear motion shaft or the frame and the connection location to which one of the linear motion shaft or the frame is connected The specific relative displacement, which is the relative displacement of, is constrained by the specific force, which is the specific force. The specific relative displacement is allowed when a force exceeding the specific force is applied to the connecting portion to which one of the linear motion shaft or the frame is connected.
As a result, the damper can suppress the shaking of the structure, and when a force exceeding a specific force is applied to the connecting portion, a specific relative displacement is allowed and an excessive force is prevented from being generated at the connecting portion.

  Below, the seismic isolation mechanism which concerns on embodiment of this invention is demonstrated. The present invention includes any of the embodiments described below, or a combination of two or more of them.

In the seismic isolation mechanism according to the embodiment of the present invention, the specific relative displacement is a relative rotation around the central axis of the linear motion shaft between one of the linear motion shaft or the frame and a connecting portion. Displacement.
According to the configuration of the above-described embodiment, the specific relative displacement is a relative rotational displacement around the central axis of the linear motion shaft between one of the linear motion shaft or the frame and a connection portion.
As a result, the damper can suppress the shaking of the structure, and when a force exceeding a specific force acts on the connection location, the relative rotational displacement between the damper and the connection location is allowed, and the connection location The generation of excessive force can be suppressed.

In the seismic isolation mechanism according to an embodiment of the present invention, the linear motion shaft is formed with a male screw at an end, and at least one of the pair of connection members is fitted into the male screw of the linear motion shaft. The mounting member is formed with a mating female screw, the mounting member is fixed to the structure at a connection point, and the specific force is generated by friction between the mounting member and the linear motion shaft. It is the force by the torque around the central axis.
With the configuration of the above-described embodiment, the linear motion shaft is formed with a male screw at the end. At least one connecting member of the pair of connecting members has an attachment member. The mounting member is formed with a female screw that fits into the male screw of the linear motion shaft. The attachment member is fixed to the structure at a connection location. The specific force is a force generated by a torque around the central axis of the linear motion shaft generated by friction between the mounting member and the linear motion shaft.
As a result, when a force exceeding the force due to the torque generated by the friction between the mounting member and the linear motion shaft acts on the connecting portion, the mounting member fixed to the linear motion shaft and the connecting portion of the damper; Relative rotational displacement between the two can be allowed, and an excessive force can be prevented from being generated at the connecting portion.

In the seismic isolation mechanism according to an embodiment of the present invention, the linear motion shaft is formed with an external thread and a flat outer peripheral surface at an end, and at least one of the pair of connection members is the linear motion. A female screw that fits into the male screw of the shaft, a mounting member that forms a contact surface that can contact the outer peripheral surface of the linear motion shaft, and a pressing member that presses the contact surface against the outer peripheral surface of the linear motion shaft. And the mounting member is fixed to the structure at a connection location, and the specific force is generated by friction between the mounting member and the linear motion shaft, and is caused by a torque by the torque around the central axis of the linear motion shaft. is there.
With the configuration of the above-described embodiment, the linear motion shaft is formed with an external thread and a flat outer peripheral surface at the end. At least one connecting member of the pair of connecting members includes an attachment member and a pressing member. The attachment member is formed with a female screw that fits into the male screw of the linear motion shaft and a contact surface that can contact the outer peripheral surface of the linear motion shaft. The pressing member presses the contact surface against the outer peripheral surface of the linear motion shaft. The attachment member is fixed to the structure at a connection location. The specific force is a force generated by a torque around the central axis of the linear motion shaft generated by friction between the mounting member and the linear motion shaft.
As a result, when a force exceeding the force due to the torque generated by the friction between the mounting member and the linear motion shaft acts on the connecting portion, the mounting member fixed to the linear motion shaft and the connecting portion of the damper; Relative rotational displacement between the two can be allowed, and an excessive force can be prevented from being generated at the connecting portion.

In the seismic isolation mechanism according to the embodiment of the present invention, at least one of the pair of connecting members includes a shaft member in which a male screw is formed and a female screw that fits the male screw of the shaft member. One of the shaft member or the mounting member is fixed to one of the linear motion shaft or the frame, and the other of the shaft member or the mounting member is a structure. The specific force is a force generated by a torque around the central axis of the linear motion shaft, which is fixed at a connecting portion and the specific force is generated by friction between the mounting member and the shaft member.
According to the configuration of the above embodiment, at least one of the pair of connecting members includes a shaft member and an attachment member. The shaft member is formed with a male screw. The mounting member is formed with a female screw that fits into the male screw of the shaft member. One of the shaft member or the mounting member is fixed to one of the linear motion shaft or the frame. The other of the shaft member or the mounting member is fixed to the structure at a connection location. The specific force is a force due to a torque around the central axis of the linear motion shaft generated by friction between the mounting member and the shaft member.
As a result, when a force exceeding the force due to the torque generated by the friction between the mounting member and the shaft member is applied to the connecting portion, the relative relationship between the damper and the mounting member fixed to the connecting portion is increased. Rotational displacement is allowed and it can suppress that excessive force arises in a connection location.

In the seismic isolation mechanism according to the embodiment of the present invention, at least one of the pair of connecting members is fitted to a shaft member in which a male screw and a flat outer peripheral surface are formed, and the male screw of the shaft member. A fitting member that forms a contact surface that can come into contact with the outer peripheral surface of the shaft member, and a pressing member that presses the contact surface against the outer peripheral surface of the shaft member. One of the mounting members is fixed to one of the linear motion shaft or the frame, the other of the shaft member or the mounting member is fixed to a structure at a connection location, and the specific force is applied to the mounting member And a force due to torque around the central axis of the linear motion shaft caused by friction between the shaft member and the shaft member.
According to the configuration of the above-described embodiment, at least one of the pair of connecting members includes a shaft member, an attachment member, and a pressing member. The shaft member is formed with a male screw and a flat outer peripheral surface. The attachment member is formed with a female screw that fits into the male screw of the shaft member and a contact surface that can contact the outer peripheral surface of the shaft member. The pressing member presses the contact surface against the outer peripheral surface of the shaft member. One of the shaft member or the mounting member is fixed to one of the linear motion shaft or the frame. The other of the shaft member or the mounting member is fixed to the structure at a connection location. The specific force is a force due to a torque around the central axis of the linear motion shaft generated by friction between the mounting member and the shaft member.
As a result, when a force exceeding the force due to the torque generated by the friction between the mounting member and the shaft member is applied to the connecting portion, the relative relationship between the damper and the mounting member fixed to the connecting portion is increased. Rotational displacement is allowed and it can suppress that excessive force arises in a connection location.

The seismic isolation mechanism according to the embodiment of the present invention is a circle in which at least one of the pair of connecting members is a disk-shaped member having a central axis that coincides with the central axis of the linear motion shaft. A plate member and a sandwiching member for sandwiching the disc member from both sides of the disc shape, and one of the disc member or the sandwiching member is fixed to one of the linear motion shaft or the frame And the other of the disk member or the clamping member is fixed to the structure at a connection location, and the specific force is generated by friction between the disk-shaped member and the clamping member. This is the force due to the torque around the central axis.
According to the configuration of the above embodiment, at least one of the pair of connecting members includes a disk member and a pair of clamping members. The disc member is a disc-like member having a central axis that coincides with the central axis of the linear motion shaft. The sandwiching member sandwiches the disk member from both sides of the disk shape. One of the disk member or the clamping member is fixed to one of the linear motion shaft or the frame. The other of the disk member or the clamping member is fixed to the structure at a connection location. The specific force is a force generated by a torque around the central axis of the linear motion shaft generated by friction between the disk-shaped member and the clamping member.
As a result, when a force exceeding the force caused by the torque generated by the friction between the disk member and the clamping member acts on the connecting portion, the relative rotation between the damper and the connecting portion where the damper is connected is performed. Displacement is allowed and it can suppress that excessive force arises in a connection location.

In the seismic isolation mechanism according to the embodiment of the present invention, the specific relative displacement is relatively relative to a center axis of the linear motion shaft between one of the linear motion shaft or the frame and the connection portion. Linear displacement.
According to the configuration of the above-described embodiment, the specific relative displacement is a relative linear displacement along the central axis of the linear motion shaft between one of the linear motion shaft or the frame and the connecting portion.
As a result, the damper can suppress the shaking of the structure, and when a force exceeding a specific force is applied to the connection location, the relative linear displacement between the damper and the connection location is allowed, and the connection location is The generation of excessive force can be suppressed.

In the seismic isolation mechanism according to the embodiment of the present invention, at least one of the pair of connecting members is a long member having a fixed end and a free end, and the end surface of the fixed end is a structure. A support member that is detachably brought into contact with a mounting surface provided at a connecting portion of the connecting member and is restricted from moving in a direction parallel to the mounting surface, and a direction in which the support member is directed from a free end to a fixed end with a predetermined elastic force A tension member that pulls on the free end, and the support member is fixed at one of the linear motion shaft and the frame on the free end side, and the specific force displaces the free end relative to the mounting surface. And a force along the central axis of the linear motion shaft that is generated in a fixed portion between the support member and the linear motion shaft or one of the frames by the elastic force of the tension member.
According to the configuration of the above embodiment, at least one of the pair of connecting members includes a support member and a tension member. The support member is an elongate member having a fixed end and a free end, and the end surface of the fixed end is brought into contact with a mounting surface provided at a connection portion of the structure so as to be separated from each other in a direction parallel to the mounting surface. The movement is restrained. The tension member pulls the support member in a direction from the free end to the fixed end with a predetermined elastic force. The support member has a free end fixed to one of the linear motion shaft and the frame. When the specific force causes the free end to be displaced relative to the mounting surface, the elastic force of the tension member causes the support member and one of the linear motion shaft and the frame to be fixed to each other. This is a force along the central axis of the linear motion shaft.
As a result, the damper can suppress the shaking of the structure, and when a force exceeding a specific force is applied to the connecting portion, a relative linear displacement between the damper and the connecting portion is allowed, and the connecting portion It is possible to suppress the generation of excessive force.

In the seismic isolation mechanism according to the embodiment of the present invention, at least one of the pair of coupling members is formed with a first surface that is a plane parallel to the central axis of the linear motion shaft. A first plate member, a second plate member formed with a second surface that is parallel to the central axis of the linear motion shaft, the first surface of the first plate member, and the second plate member. A pressing member that presses the two surfaces together with a predetermined force, and one of the first plate member or the second plate member is fixed to the structure at a connection location, and the first plate member or the second plate The other of the members is fixed to one of the linear motion shaft or the frame, and the specific force is along the central axis of the linear motion shaft generated by friction between the first surface and the second surface. It is power.
According to the configuration of the above-described embodiment, at least one of the pair of connection members includes a first plate member, a second plate member, and a pressing member, and the first plate member is the linear motion A first surface which is a surface parallel to the central axis of the shaft is formed. The second plate member is formed with a second surface which is a surface parallel to the central axis of the linear motion shaft. The pressing member presses the first surface of the first plate member and the second surface of the second connecting member together with a predetermined force. One of the first plate member or the second plate member is fixed to the structure at a connection location. The other of the first plate member or the second plate member is fixed to one of the linear motion shaft or the frame. The specific force is a force along the central axis of the linear motion shaft generated by friction between the first surface and the second surface.
As a result, the damper can suppress the shaking of the structure, and when a force exceeding a specific force is applied to the connection location, the relative linear displacement between the damper and the connection location is allowed, and the connection location is The generation of excessive force can be suppressed.

As described above, the seismic isolation mechanism according to the present invention has the following effects due to its configuration.
The linear motion shaft and the frame of the damper having the linear motion shaft, the rotating body, and the frame are connected to a pair of connection locations, respectively, and the connection member is between the damper and the connection location. A specific relative displacement is constrained by a specific force, and when a force exceeding a specific force is applied, the specific relative displacement is allowed, so that the damper can suppress the shaking of the structure and exceed the specific force. When a force acts on the connecting portion, a specific relative displacement is allowed, and an excessive force can be prevented from being generated at the connecting portion.
Further, the linear motion shaft of the damper and the frame are coupled to a pair of coupling locations, respectively, and the coupling member is a relative rotational displacement around the central axis of the linear motion shaft between the damper and the coupling location. Is restricted by a specific force, and when a force exceeding a specific force is applied, the rotational displacement is allowed, so that the damper can suppress the shaking of the structure, and the force exceeding the specific force If it acts on, the relative rotational displacement between the said damper and a connection location is permitted, and it can suppress that an excessive force arises in a connection location.
Further, the male screw of the linear motion shaft and the female screw of the mounting member are fitted, and a force caused by the friction between the mounting member and the linear motion shaft causes a relative force between the damper and the connecting portion. When the force exceeding the force due to the torque generated by the friction between the mounting member and the linear motion shaft is applied to the connection location, the linear motion shaft and the connection location of the damper are restricted. It is possible to allow relative rotational displacement between the mounting member and the mounting member, and to prevent an excessive force from being generated at the connection location.
Further, the male screw of the linear motion shaft and the female screw of the mounting member are fitted, and the pressing member presses the mounting member against the linear motion shaft, and is generated by friction between the mounting member and the linear motion shaft. Since the force due to the torque restrains the relative rotational displacement between the damper and the connecting portion, the force exceeding the force due to the torque generated by the friction between the mounting member and the linear motion shaft is connected to the connecting portion. If it acts on, the relative rotational displacement between the said linear motion shaft of the said damper and the said attachment member fixed to a connection location is permitted, and it can suppress that an excessive force arises in a connection location.
The male screw of the shaft member fixed to one of the damper or the structure and the female screw of the mounting member fixed to the other of the damper or the structure are fitted, and the mounting member and the shaft member Since the force due to the torque generated by the friction restrains the relative rotational displacement between the damper and the connecting portion, the force due to the torque generated by the friction between the mounting member and the shaft member is exceeded. When a force acts on the connection location, relative rotational displacement between the damper and the mounting member fixed to the connection location is allowed, and an excessive force can be prevented from being generated at the connection location.
Further, the male screw of the shaft member fixed to one of the damper or the structure and the female screw of the mounting member fixed to the other of the damper or the structure are fitted, and the pressing member uses the mounting member. Since the force due to the torque generated by the friction between the mounting member and the shaft member presses against the shaft member restrains the relative rotational displacement between the damper and the connecting portion, the mounting member and When a force exceeding the force due to the torque generated by the friction with the shaft member acts on the connecting part, the relative displacement between the damper and the mounting member fixed to the connecting part is allowed, and the connecting part is connected. It is possible to suppress an excessive force from being generated at the location.
In addition, a pair of the clamping members sandwich the disk member from both sides, one is fixed to the linear motion shaft or the frame, and the other is fixed to the structure, and between the disk member and the clamping member Since the relative rotational displacement between the damper and the structure is constrained by the force caused by the torque generated by the friction, the force caused by the torque generated by the friction between the disk member and the clamping member is exceeded. When the force acts on the connecting portion, a relative rotational displacement between the damper and the connecting portion where the damper is connected can be allowed to prevent an excessive force from being generated at the connecting portion.
Further, the linear motion shaft of the damper and the frame are connected to a pair of connection locations, and the connection member is a relative straight line along the central axis of the linear motion shaft between the damper and the connection locations. Since the displacement is constrained by a specific force and the force exceeding the specific force is applied, the linear displacement is allowed, so that the damper can suppress the shaking of the structure, and the force exceeding the specific force If it acts on a location, the relative linear displacement between the said damper and a connection location is permitted, and it can suppress that an excessive force arises in a connection location.
Further, the fixed end of the long support member is brought into contact with a mounting surface provided at a connection portion of the structure so as to be separable, the damper is fixed to the free end side, and the elastic force of the tension member is used. The support member is pulled toward the fixed end, and the force along the central axis of the linear motion shaft generated in the fixing portion between the support member and the damper is caused by the elastic force of the tension member to reduce the specific relative displacement. Since the damper can restrain the vibration of the structure, if a force exceeding a specific force is applied to the connecting portion, a relative linear displacement between the damper and the connecting portion is allowed. Thus, it is possible to suppress an excessive force from being generated at the connection portion.
The pressing member is pressed against the first surface of the first plate member fixed to the structure and the second surface of the second plate member fixed to the damper with a predetermined force. Since the force generated by the friction between the surface and the second surface restrains the relative rotational displacement between the damper and the connecting portion, the damper can suppress the shaking of the structure, When a force exceeding a specific force is applied to the connecting portion, relative linear displacement between the damper and the connecting portion is allowed, and an excessive force can be prevented from being generated at the connecting portion.
Therefore, the seismic isolation mechanism provided in the structure suitable for optimizing the seismic isolation / damping performance with a simple configuration can be provided.

It is a perspective sectional view of a damper concerning an embodiment of the present invention. It is sectional drawing of the damper which concerns on embodiment of this invention. It is a mass point system model figure of a damper concerning an embodiment of the present invention. It is a fragmentary figure of the seismic isolation mechanism which concerns on 1st, 3rd embodiment of this invention. It is a fragmentary figure of the seismic isolation mechanism which concerns on 2nd, 4th embodiment of this invention. It is a fragmentary figure of the seismic isolation mechanism which concerns on 5th embodiment of this invention. It is CC sectional drawing of the seismic isolation mechanism which concerns on 5th embodiment of this invention. It is DD sectional drawing of the seismic isolation mechanism which concerns on 5th embodiment of this invention. It is a general view of the seismic isolation mechanism which concerns on 6th embodiment of this invention. It is a fragmentary figure of the seismic isolation mechanism which concerns on 6th embodiment of this invention. It is a characteristic view of the seismic isolation mechanism which concerns on 6th embodiment of this invention. It is a disassembled perspective view of the seismic isolation mechanism which concerns on 7th embodiment of this invention. It is an application figure of the seismic isolation mechanism which concerns on the 1st-7th embodiment of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

The seismic isolation mechanism according to the embodiment of the present invention is a mechanism provided in a structure having a pair of connecting portions that are relatively displaced in accordance with shaking.
The seismic isolation mechanism according to the embodiment of the present invention includes a damper 100 and a pair of connecting members 200.
The damper 100 according to the embodiment of the present invention includes a linear motion shaft 110, a rotating body 120, and a frame 130.
The linear motion shaft 110 is a shaft body provided with a spiral groove which is a spiral groove having a predetermined pitch along the longitudinal direction on the outer peripheral surface.
The rotating body 120 is guided following the spiral groove.
The frame 130 rotatably supports the rotating body.

First, an example of a damper according to an embodiment of the present invention will be described in detail.
FIG. 1 is a perspective sectional view of a damper according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the damper according to the embodiment of the present invention. FIG. 3 is a mass system model diagram of the damper according to the embodiment of the present invention.

The damper 100 according to the embodiment of the present invention includes a linear motion shaft 110, a rotating body 120, and a frame 130.
The damper 100 according to the embodiment of the present invention may include a linear motion shaft 110, a rotating body 120, a frame 130, and a viscous body 140.
The damper 100 according to the embodiment of the present invention may include a linear motion shaft 110, a rotating body 120, a frame 130, and an additional rotating member 150.
The damper 100 according to the embodiment of the present invention may include a linear motion shaft 110, a rotating body 120, a frame 130, an additional rotating member 150, and an external additional rotating member 160.
The damper 100 according to the embodiment of the present invention may include a linear motion shaft 110, a rotating body 120, a frame 130, a viscous body 140, and an additional rotating member 150.
The damper 100 according to the embodiment of the present invention may include a linear motion shaft 110, a rotating body 120, a frame 130, a viscous body 140, an additional rotating member 150, and an external additional rotating member 160.
2, the damper 100 includes a linear motion shaft 110, a rotating body 120, a frame 130, a viscous body 140, an additional rotating member 150, and an external additional rotating member 160. The damper 100 and the elastic body 300 are connected by a connecting member 200. Showing how they are connected in series,

The linear motion shaft 110 is a shaft body provided with a spiral groove G which is a spiral groove having a predetermined pitch P along the longitudinal direction on the outer peripheral surface.
The spiral groove G is provided in part or all of the outer peripheral surface of the linear motion shaft 110.
One or a plurality of spiral grooves G are provided on the outer peripheral surface of the linear motion shaft 110.

The rotating body 120 is a mechanism guided along the spiral groove G.
For example, the rotating body 120 performs a spiral motion relative to the linear motion shaft 110 following the spiral groove G provided on the outer peripheral surface of the linear motion shaft 110.
When the linear motion shaft 110 is moved in the longitudinal direction while restricting the movement of the rotator 120 in the longitudinal direction, the rotator 120 rotates.
The rotating body 120 may be composed of a rotating body main body 121 and a rotating body ball 122.
The rotating body ball 122 is held by the rotating body main body 121 and guided to the spiral groove G of the linear motion shaft 110.
The plurality of rotating body balls 122 are held by the rotating body main body 121, circulated and guided to the spiral groove G of the linear motion shaft 110.

The frame 130 is a structure that rotatably supports the rotating body 120.
The frame 130 includes a frame main body 131 and a rotating body bearing 132.
The rotator bearing 132 supports the rotator 120 on the basis of the frame main body 131 so as to restrain the movement of the linear motion shaft in the longitudinal direction and to rotate freely.

When the linear motion body 110 and the rotary body 120 are relatively displaced in the longitudinal direction, the rotary body is rotationally displaced according to the linear motion displacement of the linear motion shaft 110.
When the linear motion body 110 and the rotary body 120 are relatively displaced in the longitudinal direction, the ratio of the linear motion displacement of the linear motion shaft 110 and the rotational displacement of the rotational body 120 changes corresponding to the relative displacement. Also good.

The viscous body 140 is a viscous fluid that fills the gap between the rotating body 120 and the frame 130.
The viscous body 140 may be filled in a gap between the additional rotating member 150 and the frame 130 described later.
The damper filled with the viscous body 140 is referred to as a viscous damper.

The additional rotating member 150 is a member that rotates in synchronization with the rotating body 120.
The additional rotating member 150 may be fixed to the rotating body 120 so that their rotational axes coincide.
The additional rotating member bearing 133 may rotatably support the additional rotating member 150 based on the frame main body 131.
The viscous body 140 may be filled in a gap between the additional rotating member 150 and the frame 130.

The external additional rotating member 160 is a member that rotates in synchronization with the rotating body 120.
The external additional rotating member 160 is detachably added to the rotating body 120.
The external additional rotating member 160 includes a plurality of portions, and the rotational inertia ratio can be increased or decreased by detaching the plurality of portions.

The pair of connecting members 200 are members that connect the linear motion shaft 110 and the frame 130 to a pair of connecting portions, respectively.
FIG. 2 occupies a state where the trunnion-type connecting member 210 connects the linear motion shaft 110 to the connecting portion via the elastic body 300 and connects the frame 130 to the connecting portion.
However, the connecting member 200 shown in FIG. 2 has the technical feature of “a specific relative displacement is permitted when a force exceeding a specific force is applied to a connecting portion to which one of the linear motion shaft or the frame is connected”. It does not have.
A description of the connecting member according to the present application will be described later.

The elastic body 300 is a member that is elastically deformed in the longitudinal direction of the linear motion shaft.
For example, the elastic body 300 includes an elastic member that is elastically deformed in the longitudinal direction of the linear motion shaft and a pair of flange structures that sandwich the elastic member therebetween.

FIG. 3 shows a mass system model when a tuned viscous mass damper in which a viscous mass damper and an elastic body 300 are directly connected is fixed to a structure.
Here, mr is an apparent inertial mass due to a structure in which the linear motion shaft 110 and the rotary body 120 or the linear motion shaft 110, the rotary body 120, and the additional rotary member 150 are combined.
c is an apparent attenuation coefficient due to the structure of the linear motion shaft 110 and the viscous body 140.
Kb is an elastic coefficient related to the displacement along the longitudinal direction of the elastic body 300.
m is the apparent mass of the location where the tuned viscous damper of the structure is attached.
K is an apparent elastic coefficient at the location where the tuned viscous damper of the structure is attached.

The pair of connecting members 200 according to the embodiment of the present invention are members that connect the linear motion shaft 110 and the frame 130 to a pair of connecting portions, respectively.
The at least one connecting member 200 of the pair of connecting members is identified between one of the linear motion shaft 110 or the frame 130 and the connection location where one of the linear motion shaft 110 or the frame 130 is connected. When the force exceeding the specific force is applied to one of the connecting portions of the linear motion shaft 110 or the frame 130, the specific relative displacement that is the relative displacement of the linear motion shaft 110 or the frame 130 is restricted. forgive.
For example, the coupling member 200 that couples the linear motion shaft 110 to the coupling location is a specific relative displacement that is a specific relative displacement between the linear motion shaft 110 and the coupling location to which the linear motion shaft 110 is coupled with a specific force. When a force exceeding a specific force is applied to a connecting portion where the linear motion shaft 110 is connected, the specific relative displacement is allowed.
For example, the connecting member 200 that connects the frame 130 to the connecting portion restrains a specific relative displacement that is a specific relative displacement between the frame 130 and the connecting portion to which the frame 130 is connected with a specific force that is a specific force. When a force exceeding a specific force is applied to a connecting portion where the frames are connected, a specific relative displacement is allowed.

Below, the structure of the seismic isolation mechanism which concerns on the 1st-5th embodiment of this invention is demonstrated individually based on a figure.
The specific relative displacement is a relative rotational displacement around the central axis of the linear motion shaft 110 between one of the linear motion shaft 110 or the frame 130 and the connecting portion.
For example, the specific relative displacement is a relative rotational displacement about the central axis of the linear motion shaft 110 between the linear motion shaft 110 and a connecting portion where the linear motion shaft 110 is connected.
For example, the specific relative displacement is a relative rotational displacement around the central axis of the linear motion shaft 110 between the frame 130 and the connecting portion where the frame 130 is connected.
The specific force is a force due to a torque around the central axis of the linear motion shaft 110.

The structure of the seismic isolation mechanism according to the first and third embodiments of the present invention will be described individually.
FIG. 4 is a partial view of the seismic isolation mechanism according to the first and third embodiments of the present invention.

The seismic isolation mechanism according to the first embodiment of the present invention includes a damper 100 and a pair of connecting members 200.
The linear motion shaft 110 is formed with a male screw H at the end.
At least one connecting member 200 of the pair of connecting members 200 is constituted by an attachment member 230 on which a female screw I that fits with the male screw H of the linear motion shaft 110 is formed.
The attachment member 230 is fixed to the structure at the connection location.
The specific force is a force generated by a torque around the central axis of the linear motion shaft 110 generated by friction between the mounting member 230 and the linear motion shaft 110.

FIG. 4 illustrates a structure in which the connecting member 200 according to the embodiment of the present invention is fixed to the male screw H of the linear motion shaft 110.
The attachment member 230 includes an attachment member main body 231.
The attachment member main body 231 includes a flange portion and a trunk portion.
The flange portion is fixed to the connection location via the first connection member 210 or the second connection member 220.

A force generated by friction between the female screw I of the mounting member 230 and the male screw H of the linear motion shaft 110 due to the torque around the central axis of the linear shaft 110 is referred to as a specific force.
The relative rotational displacement between the attachment member 230 and the linear motion shaft 110 is referred to as a specific relative displacement.
A specific force constrains a specific relative displacement.
When the pair of connecting portions are relatively linearly displaced, the linear motion shaft 110 and the rotating body 120 are relatively linearly displaced. When the linear motion shaft 110 is linearly displaced, the rotating body 120 rotates.
Torque and thrust corresponding to the rotational inertia ratio of the rotator 120, the additional rotating member 150, and the external additional rotating member 160 act on the connection location via the linear motion shaft 110 and the frame 130.
When the displacement speed of the relative linear displacement of the pair of connection points is small, the force due to the torque acting on the connection points is smaller than the specific force.
As the displacement speed of the relative linear displacement of the pair of connection points increases, the force due to the torque acting on the connection points further increases.
When the torque corresponding to the rolling inertia ratio exceeds a specific force, a specific relative displacement is allowed.
As a result, it is possible to suppress an excessive force from being generated at the connection location.

The seismic isolation mechanism according to the third embodiment of the present invention includes a damper 100 and a pair of connecting members 200.
At least one connecting member 200 of the pair of connecting members 200 includes a shaft member (not shown) in which a male screw H is formed, and a mounting member 230 in which a female screw I that fits the male screw H of the shaft member is formed. Consists of.
One of the shaft member (not shown) or the attachment member 230 is fixed to one of the linear motion shaft 110 or the frame 130.
The other of the shaft member (not shown) or the attachment member 230 is fixed to the structure at the connection location.
The specific force is a force generated by a torque around the central axis of the linear motion shaft 110 generated by friction between the mounting member 230 and the shaft member.

The force generated by the friction between the female screw I of the mounting member 230 and the male screw H of the shaft member due to the torque around the central axis of the linear shaft 110 is referred to as a specific force.
The relative rotational displacement between the attachment member 230 and the shaft member is referred to as a specific relative displacement.
A specific force constrains a specific relative displacement.
When the pair of connecting portions are relatively linearly displaced, the linear motion shaft 110 and the rotating body 120 are relatively linearly displaced. When the linear motion shaft 110 is linearly displaced, the rotating body 120 rotates.
Torque and thrust corresponding to the rotational inertia ratio of the rotator 120, the additional rotating member 150, and the external additional rotating member 160 act on the connection location via the linear motion shaft 110 and the frame 130.
When the displacement speed of the relative linear displacement of the pair of connection points is small, the force due to the torque acting on the connection points is smaller than the specific force.
As the displacement speed of the relative linear displacement of the pair of connection points increases, the force due to the torque acting on the connection points further increases.
When the torque corresponding to the rotational inertia ratio exceeds a specific force, a specific relative displacement is allowed.
As a result, it is possible to suppress an excessive force from being generated at the connection location.

Next, the structure of the seismic isolation mechanism according to the second and fourth embodiments of the present invention will be described individually.
FIG. 5 is a partial view of the seismic isolation mechanism according to the second and fourth embodiments of the present invention.

The seismic isolation mechanism according to the second embodiment of the present invention includes a damper 100 and a pair of connecting members 200.
The linear motion shaft 110 is formed with a male screw H and a flat outer peripheral surface J at the end.
For example, the linear motion shaft 110 is formed with a male screw H and a flat outer peripheral surface J adjacent to the male screw H at the end.
At least one connecting member 200 of the pair of connecting members 200 is formed with a contact surface K that can come into contact with a female screw I fitted to a male screw H of the linear motion shaft 110 and an outer peripheral surface J of the linear motion shaft 110. The mounting member 230 and the pressing member 240 that presses the contact surface K against the outer peripheral surface J of the linear motion shaft 110 are configured.
The attachment member 230 is fixed to the structure at the connection location.
The specific force is a force due to torque around the central axis of the linear motion shaft 110 generated by friction between the mounting member 230 and the linear motion shaft 110.

FIG. 5 illustrates a structure in which the connecting member 200 according to the embodiment of the present invention is fixed to the male screw H of the linear motion shaft 110.
The attachment member 230 includes an attachment member main body 231 and a friction member 232.
The attachment member main body 231 includes a flange portion and a trunk portion.
The flange portion is fixed to the connection location via the first connection member 210 or the second connection member 220.
The friction member 232 is fitted into a recess provided on the inner peripheral surface of the through hole of the mounting member main body 231, and is held by the mounting member main body 231 so that the contact surface K contacts the outer peripheral surface J of the linear motion shaft 110. .
The pressing member 240 presses the friction member 232 against the linear motion shaft 110 and presses the contact surface K against the outer peripheral surface J of the linear motion shaft 110.

Torque around the central axis of the linear shaft 110 caused by the friction between the internal thread I of the mounting member 230 and the external thread H of the linear motion shaft 110 and the friction between the contact surface K of the mounting member 230 and the outer peripheral surface J of the linear motion shaft 110 The force by is the specific force.
A relative rotational displacement between the mounting member 230 and the linear motion shaft 110 is referred to as a specific relative displacement.
A specific force constrains a specific relative displacement.
When the pair of connecting portions are relatively linearly displaced, the linear motion shaft 110 and the rotating body 120 are relatively linearly displaced. When the linear motion shaft 110 is linearly displaced, the rotating body 120 rotates.
Torque and thrust corresponding to the rotational inertia ratio of the rotating body 120, the additional rotating member 150, and the external additional rotating member 160 act on the connection location via the linear motion shaft 110 and the frame 130.
When the displacement speed of the relative linear displacement of the pair of connection points is small, the force due to the torque acting on the connection points is smaller than the specific force.
As the displacement speed of the relative linear displacement of the pair of connection points increases, the force due to the torque acting on the connection points further increases.
When the torque corresponding to the rotational inertia ratio exceeds a specific force, a specific relative displacement is allowed.
As a result, it is possible to suppress an excessive force from being generated at the connection location.

The seismic isolation mechanism according to the fourth embodiment of the present invention includes a damper 100 and a pair of connecting members 200.
At least one connecting member 200 of the pair of connecting members 200 is fitted into a shaft member (not shown) formed with a male screw H and a flat outer peripheral surface J adjacent to the male screw H, and a male screw H of the shaft member. A fitting member 230 that forms a contact surface K that can contact the outer peripheral surface J of the shaft member and a pressing member 240 that presses the contact surface K against the outer peripheral surface J of the shaft member.
One of a shaft member (not shown) or the attachment member 230 is fixed to one of the linear motion shaft 110 or the frame 130.
The other of the shaft member (not shown) or the attachment member 230 is fixed to the structure at the connection location.
The specific force is a force generated by a torque around the central axis of the linear motion shaft 110 generated by friction between the mounting member 230 and the shaft member.
For example, a shaft member (not shown) is fixed to one of the linear motion shaft 110 or the frame 130, and the attachment member 230 is fixed to the structure at a connection location.
For example, the attachment member 230 is fixed to one of the linear motion shaft 110 or the frame 130, and a shaft member (not shown) is fixed to the structure at a connection location.

Around the central axis of the linear shaft 110 generated by the friction between the female thread I of the mounting member 230 and the male thread H of the shaft member (not shown) and the friction between the contact surface K of the mounting member 230 and the outer peripheral surface J of the shaft member. The force due to the torque is referred to as a specific force.
The relative rotational displacement between the mounting member 230 and the shaft member is referred to as a specific relative displacement.
A specific force constrains a specific relative displacement.
When the pair of connecting portions are relatively linearly displaced, the linear motion shaft 110 and the rotating body 120 are relatively linearly displaced. When the linear motion shaft 110 is linearly displaced, the rotating body 120 rotates.
Torque and thrust corresponding to the rotational inertia ratio of the rotator 120, the additional rotating member 150, and the external additional rotating member 160 act on the connection location via the linear motion shaft 110 and the frame 130.
When the displacement speed of the relative linear displacement of the pair of connection points is small, the force due to the torque acting on the connection points is smaller than the specific force.
As the displacement speed of the relative linear displacement of the pair of connection points increases, the force due to the torque acting on the connection points further increases.
When the torque corresponding to the rotational inertia ratio exceeds a specific force, a specific relative displacement is allowed.
As a result, it is possible to suppress an excessive force from being generated at the connection location.

Next, the structure of the seismic isolation mechanism according to the fifth embodiment of the present invention will be described individually.
FIG. 6 is a partial view of the seismic isolation mechanism according to the fifth embodiment of the present invention. FIG. 7 is a CC cross-sectional view of the seismic isolation mechanism according to the fifth embodiment of the present invention. FIG. 8 is a DD cross-sectional view of the seismic isolation mechanism according to the fifth embodiment of the present invention.

The seismic isolation mechanism according to the fifth embodiment of the present invention includes a damper 100 and a pair of connecting members 200.
At least one of the pair of connecting members 200 includes a disk member 250 and a disk member 250 that are disk-shaped members having a central axis that coincides with the central axis of the linear motion shaft 110. And a sandwiching member 260 sandwiched from both sides of the shape.
One of the disc member 250 or the clamping member 260 is fixed to one of the linear motion shaft 110 or the frame 130.
The other of the disc member 250 or the pinching member 260 is fixed to the structure at the connection location.
The specific force is a force due to torque around the central axis of the linear motion shaft generated by friction between the disc member 250 and the clamping member 260.
For example, the disk member 250 is fixed to one of the linear motion shaft 110 or the frame 130, and the clamping member 260 is fixed to the structure at the connection location.
For example, the clamping member 260 is fixed to one of the linear motion shaft 110 and the frame 130, and the disk member 250 is fixed to the structure at the connection location.

FIG. 6 shows a state in which the disc member 250 is fixed to the linear motion shaft 110 and the pair of clamping members 260 is fixed to the connecting portion of the structure via the first connecting member 210.
The disk member 250 includes a disk member main body 251, a first friction disk 252, and a second friction disk 253.
The first friction disk 252 and the second friction disk 253 are annular members made of a friction material.
The first friction disk 252 is fixed to one surface of the disk member main body 251.
The second friction disk 253 is fixed to the other surface of the disk member main body 251.
The clamping member 260 includes a first clamping member 261, a second clamping member 262, and a plurality of clamping rods 263.
For example, the tightening rod 263 includes a bolt and a nut.
The first clamping member 261 and the second clamping member 262 sandwich both surfaces of the disk member 250.
A plurality of clamping rods 263 penetrates the first clamping member 261 and the second clamping member 262.
The first clamping member 261 abuts on the first friction disk 252 to generate torque due to friction.
The second clamping member 262 comes into contact with the second friction disk 153 to generate torque due to friction.

The force generated by the friction between the disc member 250 and the clamping member 260 due to the torque around the central axis of the linear shaft 110 is the specific force.
The relative rotational displacement between the disc member 250 and the clamping member 260 is referred to as a specific relative displacement.
A specific force constrains a specific relative displacement.
When the pair of connecting portions are relatively linearly displaced, the linear motion shaft 110 and the rotating body 120 are relatively linearly displaced. When the linear motion shaft 110 is linearly displaced, the rotating body 120 rotates.
Torque and thrust corresponding to the rotational inertia ratio of the rotating body 120, the additional rotating member 150, and the external additional rotating member 160 act on the connection location via the linear motion shaft 110 and the frame 130.
When the displacement speed of the relative linear displacement of the pair of connection points is small, the force due to the torque acting on the connection points is smaller than the specific force.
As the displacement speed of the relative linear displacement of the pair of connection points increases, the force due to the torque acting on the connection points further increases.
When the torque corresponding to the rotational inertia ratio exceeds a specific force, a specific relative displacement is allowed.
As a result, it is possible to suppress an excessive force from being generated at the connection location.

Below, the structure of the seismic isolation mechanism which concerns on 6th-7th embodiment of this invention is demonstrated individually based on a figure.
The specific relative displacement is a relative linear displacement along the central axis of the linear motion shaft 110 between one of the linear motion shaft 110 or the frame 130 and the connecting portion.
For example, the specific relative displacement is a relative linear displacement along the central axis of the linear motion shaft 110 between the linear motion shaft 110 and the connection portion.
For example, the specific relative displacement is a relative linear displacement along the central axis of the linear motion shaft 110 between the frame 130 and the connection portion.
The specific force is a relative linear displacement along the central axis of the linear motion shaft 110.

The structure of the seismic isolation mechanism according to the sixth embodiment of the present invention will be described individually.
FIG. 9 is an overall view of the seismic isolation mechanism according to the sixth embodiment of the present invention. FIG. 10 is a partial view of the seismic isolation mechanism according to the sixth embodiment of the present invention. FIG. 11 is a characteristic diagram of the seismic isolation mechanism according to the sixth embodiment of the present invention.

The seismic isolation mechanism according to the sixth embodiment of the present invention includes a damper 100 and a pair of connecting members 200.
At least one connecting member of the pair of connecting members includes a support member 270 and a tension member 280.
The support member 270 is a long member having a fixed end and a free end. The end surface of the fixed end is brought into contact with a mounting surface provided at a connection portion of the structure so as to be separated from each other, and in a direction parallel to the mounting surface. Is restricted from moving.
The tension member 280 pulls the support member in a direction from the free end to the fixed end with a predetermined elastic force.
The support member 270 is fixed to one of the linear motion shaft 110 and the frame 130 on the free end side.
The center of the linear motion shaft 110 generated at the fixed portion between the support member 270 and the linear motion shaft 110 or the frame 130 by the elastic force of the tension member 280 when the specific end is displaced relative to the mounting surface. Force along the axis.

  9 and 10, the damper 100 with the central axis of the linear motion shaft 110 placed horizontally is disposed between the upper layer and the lower layer of the structure, and the support surface M at the fixed end of the support member 270 with the axis center vertical. The frame 130 is fixed to the free end side of the support member 270 via the second connecting member 220 so as to be detachably contacted with the mounting surface L of the mounting structure 15 provided in the upper layer of the structure 10. A mode that the axis | shaft 110 is fixed to a lower layer through the 1st connection member 210 is shown.

The support member 270 includes a support member main body 271 and a slip restraining member 272.
The support member main body 271 is a structure having a fixed end and a free end.
For example, the support member main body 271 is made of an H-shaped steel material.
A flange-shaped support surface M is formed on the end surface of the fixed end of the H-shaped steel material.
For example, the support surface M is provided with a dowel hole.
The slip restraining member 272 is a member that prevents the support surface M from moving parallel to the mounting surface L.
For example, the slip restraining member 272 is a dowel that fits into a dowel hole.

The tension member 280 is a member that pulls the support member with a predetermined elastic force in a direction from the free end to the fixed end.
For example, the tension member 280 includes a tension rod 281 and an elastic force adjustment member 282.
The tension rod 281 is a long steel material having nuts screwed into both ends.
One end of the tension rod 281 is fixed to the attachment structure member of the structure, and the other end is fixed to the support member 270, and tension is applied in advance.
The elastic force adjusting member 282 is a member that adjusts the elastic force of the tension member 280.
For example, the elastic force adjusting member 282 is a spring spring, a compression spring, or the like.
The magnitude of the elastic force can be adjusted by the length of the tension rod 281 and the elastic force adjusting member 282.

When the free end of the support member 270 is relatively displaced with respect to the mounting surface L in the direction intersecting the axis, the linear motion shaft 110 generated at the fixing portion between the support member 270 and the frame 130 by the elastic force of the tension member 280. The force along the central axis is the specific force.
The relative linear displacement between the attachment member 230 and the linear motion shaft 110 is a specific relative displacement.
A specific force constrains a specific relative displacement.
When the pair of connecting portions are relatively linearly displaced, the linear motion shaft 110 and the rotating body 120 are relatively linearly displaced. When the linear motion shaft 110 is linearly displaced, the rotating body 120 rotates.
Torque and thrust corresponding to the rotational inertia ratio of the rotator 120, the additional rotating member 150, and the external additional rotating member 160 act on the connection location via the linear motion shaft 110 and the frame 130.
When the displacement speed of the relative linear displacement of the pair of connection points is small, the force by the thrust acting on the connection points is smaller than the specific force.
As the displacement speed of the relative linear displacement of the pair of connection points increases, the force due to the thrust acting on the connection points further increases.
If the thrust force exceeds a specific force, a specific relative displacement is allowed.
As a result, it is possible to suppress an excessive force from being generated at the connection location.

FIG. 11 shows the relationship between the specific force and the relative linear displacement.
In FIG. 11, the solid line from the origin to P <b> 1 indicates the force due to the thrust in the horizontal direction due to the elastic deformation of the support member 270 and the tension member 280. The solid lines from P1 to P2 indicate the force due to the thrust in the horizontal direction in a state where a part of the support surface M of the support member 270 and the mounting surface L of the mounting structure are separated from each other. The solid line from P2 to the outside indicates the force due to the thrust in the horizontal direction when the tension member 280 is yielded.

The structure of the seismic isolation mechanism according to the seventh embodiment of the present invention will be described individually.
FIG. 12 is an exploded perspective view of the seismic isolation mechanism according to the seventh embodiment of the present invention.

The seismic isolation mechanism according to the seventh embodiment of the present invention includes a damper 100 and a pair of connecting members 200.
At least one of the pair of connecting members 200 includes a first plate member 291, a second plate member 292, and a pressing member 294.
The first plate member 291 is a member that forms a first surface that is a surface parallel to the central axis of the linear motion shaft 110.
The second plate member 292 is a member that forms a second surface that is a surface parallel to the central axis of the linear motion shaft 110.
The pressing member 294 is a member that presses the first surface of the first connecting member 291 and the second surface of the second connecting member 292 with a predetermined force.
One of the first plate member 291 or the second plate member 292 is fixed to the structure at the connection location.
The other of the first plate member 291 or the second plate member 292 is fixed to one of the linear motion shaft 110 or the frame 130.
The specific force is a force along the central axis of the linear motion axis generated by friction between the first surface and the second surface.

In FIG. 12, the first plate member 291 is composed of a flange and a single plate member fixed perpendicularly to the flange surface of the flange, and the surface of the plate member forms the first surface. The member 292 is composed of a flange and two plate members fixed at right angles to the flange surface of the flange, the surface of the plate member forms a second surface, and the pressing member 294 is the first surface and the second surface Are pressed through the friction plate 293.
The two plate members of the second plate member 929 are provided with elongated holes extending along the central axis of the linear motion shaft 110.
The pressing member 294 includes a bolt and a nut.
The bolt penetrates the long hole of the second plate member 292.
Friction occurs between the first surface and the second surface.

The force along the central axis of the linear motion shaft 110 generated by the friction between the first surface and the second surface is the specific force. .
The relative linear displacement along the central axis of the linear motion shaft between one of the linear motion shaft 110 or the frame 130 and the connecting portion is the specific relative displacement.
A specific force constrains a specific relative displacement.
When the pair of connecting portions are relatively linearly displaced, the linear motion shaft 110 and the rotating body 120 are relatively linearly displaced. When the linear motion shaft 110 is linearly displaced, the rotating body 120 rotates.
Torque and thrust corresponding to the rotational inertia ratio of the rotator 120, the additional rotating member 150, and the external additional rotating member 160 act on the connection location via the linear motion shaft 110 and the frame 130.
When the displacement speed of the relative linear displacement of the pair of connection points is small, the force by the thrust acting on the connection points is smaller than the specific force.
As the displacement speed of the relative linear displacement of the pair of connection points increases, the force due to the thrust acting on the connection points further increases.
If the thrust force exceeds a specific force, a specific relative displacement is allowed.
If it does in this way, it can control that excessive force arises in a connecting part.

The attachment structure to the structure 10 of the seismic isolation mechanism concerning the 1st-7th embodiment of this invention is demonstrated based on a figure.
FIG. 13 is a first conceptual diagram showing an application of the damper according to the first to seventh embodiments of the present invention.

FIG. 13 shows a form in which the damper 100 is provided between the structures 10, between the structure 10 and the foundation, or between the structure and the structure.
In FIG. 13A, the damper 100 is arranged between the layers of the structure body 10, the structure body 10 is provided with a rigid mounting structure 15 on the upper layer, and the longitudinal direction of the linear motion shaft 110 is set along the horizontal direction. The first connecting member 210 connects both ends of the linear motion shaft 110 to the lower layer of the structure 10, and the second connecting member 220 connects the frame 130 to the mounting structure 15.
In FIG. 13B, the damper 100 is disposed between the layers of the structure 10, the structure 10 is provided with an attachment structure 15 having elasticity in the upper layer, and the longitudinal direction of the linear motion shaft 110 is set along the horizontal direction. The first connecting member 210 connects the linear motion shaft 110 to the mounting structure 15, and the second connecting member 220 connects the frame 130 to the lower layer of the structure 10.
In FIG. 13C, the damper 100 is disposed between the layers of the structure body 10, the structure body 10 is provided with a rigid mounting structure 15 on the upper layer, and the longitudinal direction of the linear motion shaft 110 is set along the horizontal direction. The first connecting member 210 connects the linear motion shaft 110 to the mounting structure 15, and the second connecting member 220 connects the frame 130 to the lower layer of the structure 10.
In FIG. 13D, the damper 100 is arranged between the layers of the structure 10, the longitudinal direction of the linear motion shaft 110 is along the diagonal direction between the layers of the structural body 10, and the first connecting member 210 is the linear motion shaft 110. Are connected to the upper layer of the structure, and the second connecting member connects the frame 130 to the lower layer of the structure 10.
In FIG. 13E, the damper 100 is disposed between the layers of the structure 10, the longitudinal direction of the linear motion shaft 110 is set in the vertical direction, and the first connecting member 210 connects the linear motion shaft 110 to the upper layer of the structure. The second connecting member connects the frame 130 to the lower layer of the structure 10.
In FIG. 13F, the damper 100 is arranged between the structure 10 and the foundation, the longitudinal direction of the linear motion shaft 110 is set along the horizontal direction, and the first connecting member 210 makes the linear motion shaft 110 a structure. It shows a state in which the second connecting member is connected based on the frame 130.
In FIG. 13G, the damper 100 is arranged between the pair of structures 10, the longitudinal direction of the linear motion shaft 110 is set along the horizontal direction, and the first connecting member 210 has the linear motion shaft 110 in one structure. The second connecting member connects the frame 130 to the other structure.

The seismic isolation mechanism according to the embodiment of the present invention has the following effects due to its configuration.
The linear motion shaft 110 and the frame 130 of the damper 100 having the linear motion shaft 110, the rotating body 120, and the frame 130 are connected to a pair of connection points 200, and the connection member 200 is specified between the damper 100 and the connection points. The relative displacement of the structure is constrained by a specific force, and when a force exceeding a specific force is applied, the specific relative displacement is allowed. Therefore, the damper 100 can suppress the shaking of the structure, and the force exceeds the specific force. When this acts on the connection location, it is possible to allow a specific relative displacement and suppress an excessive force from being generated at the connection location.
Further, the linear motion shaft 110 of the damper 100 and the frame 130 are connected to a pair of connection locations, and the connection member 200 is relatively rotated about the central axis of the linear motion shaft 110 between the damper 100 and the connection locations. Since the displacement is restrained by a specific force and the rotation displacement is allowed when a force exceeding a specific force is applied, the damper 100 can suppress the shaking of the structure, and the force exceeding the specific force If it acts on, the relative rotational displacement between a damper and a connection location is permitted, and it can suppress that an excessive force arises in a connection location.
Further, the male screw of the linear motion shaft 110 and the female screw of the mounting member 230 are fitted, and the force due to the torque generated by the friction between the mounting member 230 and the linear motion shaft 110 causes the relative force between the damper 100 and the connecting portion. Therefore, if a force exceeding the force due to the torque generated by the friction between the mounting member 230 and the linear movement shaft 110 is applied to the connecting portion, the linear movement shaft 110 and the connecting portion of the damper 100 are applied to the connecting portion. It is possible to allow relative rotational displacement between the mounting member to be fixed and to prevent an excessive force from being generated at the connection point.
Further, the male screw of the linear motion shaft 110 and the female screw of the mounting member 230 are fitted, and the pressing member 240 presses the mounting member 230 against the linear motion shaft 110, and is generated by friction between the mounting member 230 and the linear motion shaft 110. Since the force due to the torque restrains the relative rotational displacement between the damper 100 and the connecting portion, the force exceeding the force due to the torque generated by the friction between the mounting member 230 and the linear motion shaft 110 is connected to the connecting portion. If it acts on, the relative rotational displacement between the linear_motion | direct_drive shaft 110 of the damper 100 and the attachment member fixed to a connection location is permitted, and it can suppress that an excessive force arises in a connection location.
Further, the male screw H of the shaft member fixed to the frame 130 and the female screw I of the mounting member 230 fixed to the structure are fitted, and the force due to the torque generated by the friction between the mounting member 230 and the shaft member is a damper. Since the relative rotational displacement between 100 and the connecting portion is constrained, if a force exceeding the force generated by the friction between the mounting member and the shaft member is applied to the connecting portion, the damper 100 is connected to the connecting portion. It is possible to allow relative rotational displacement between the mounting member fixed to the location and suppress an excessive force from being generated at the connection location.
Further, the male screw H of the shaft member fixed to the frame 130 and the female screw of the mounting member fixed to the structure are fitted, and the pressing member 240 presses the mounting member 230 against the shaft member. Since the force due to the torque generated by the friction between the damper 100 and the connecting portion restrains the relative rotational displacement, the force due to the torque generated by the friction between the mounting member 230 and the shaft member is exceeded. When the force acts on the connection location, relative rotational displacement between the damper 100 and the mounting member fixed to the connection location is allowed, and an excessive force can be prevented from being generated at the connection location.
Further, a pair of clamping members 260 sandwich the disc member 250 from both sides, one is fixed to the linear motion shaft 110 or the frame 130, and the other is fixed to the structure, and between the disc member 250 and the clamping member 260. Since the assumed rotational displacement between the damper 100 and the structure is constrained by the force caused by the torque generated by the friction, the force caused by the torque generated by the friction between the disc member 250 and the clamping member 260 is exceeded. When the force acts on the connecting portion, it is possible to allow relative rotational displacement between the damper 100 and the connecting portion to which the damper 100 is connected, thereby suppressing an excessive force from being generated at the connecting portion.
Further, the linear motion shaft 110 of the damper 100 and the frame 130 are connected to a pair of connection locations, and the connection member 200 is a relative straight line along the central axis of the linear motion shaft 110 between the damper 100 and the connection locations. Since the displacement is constrained by a specific force, and the force exceeding the specific force is applied, the linear displacement is allowed, so the damper 100 can suppress the shaking of the structure, and the force exceeding the specific force If it acts on, the relative linear displacement between the damper 100 and a connection location is permitted, and it can suppress that an excessive force arises in a connection location.
Further, the fixed end of the long support member 270 is brought into contact with the mounting surface L provided at the connection portion of the structure so as to be separable, the damper 100 is fixed to the free end side, and is supported by the elastic force of the tension member 280. Since the member is pulled to the fixed end side, the force along the central axis of the linear motion shaft 110 generated at the fixing portion between the support member 270 and the damper 100 by the elastic force of the tension member 280 restrains the specific relative displacement. When the damper 100 can suppress the shaking of the structure and a force exceeding a specific force is applied to the connecting portion, the relative displacement of the damper 100 and the connecting portion is allowed, and the connecting portion is excessive. The generation of force can be suppressed.
Further, the first surface of the first plate member 291 to which the pressing member 294 is fixed to the structure and the second surface of the second plate member 292 to be fixed to the damper are pressed with a predetermined force, and the first surface and the first surface Since the force generated by the friction between the two surfaces restrains the relative rotational displacement between the damper 100 and the connecting portion, the damper 100 can suppress the shaking of the structure, and a specific force can be applied. When the exceeding force acts on the connecting portion, a relative linear displacement between the damper 100 and the connecting portion is allowed, and an excessive force can be prevented from being generated at the connecting portion.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
In the description of the seismic isolation mechanism according to the first to seventh embodiments, the description has been made on the assumption that the damper includes the external additional rotation member. However, the present invention is not limited to this. For example, the rotation member, the viscous body, the external The additional rotating member may not be provided.
In the description of the seismic isolation mechanism according to the sixth embodiment, it has been described that the tension member 280 includes the tension rod 281 and the elastic force adjustment member 282. However, the tension member 280 is not limited thereto. Only the tension rod 281 may be used.
In the description of the seismic isolation mechanism according to the fifth and seventh embodiments, the connecting member 100 has been described as including a friction plate. However, the present invention is not limited to this, and the friction plate may not be included.
In the description of the seismic isolation mechanism according to the sixth embodiment, the support member 270 includes the support member main body 271 and the slip restraining member 272, and the slip restraining member 272 is described as a dowel. For example, the end surface of the fixed end of the support member 270 may have an uneven shape, and the uneven shape may be difficult to attach to the attachment surface of the attachment structure 16.

G spiral groove H male thread I female thread J outer peripheral surface K contact surface L mounting surface M support surface 10 structure 15 mounting structure 100 damper 110 linear motion shaft 120 rotating body 121 rotating body main body 122 rotating body ball 130 frame 131 frame main body 132 Rotating body bearing 133 Additional rotating member bearing 140 Viscous body 150 Additional rotating member 160 External additional rotating member 200 Connecting member 210 First connecting member 220 Second connecting member 230 Mounting member 231 Mounting member main body 232 Friction member 240 Pressing member 250 Disk member 251 disc member body 252 first friction disc 253 second friction disc 260 clamping member 261 first clamping member 262 second clamping member 263 tightening rod 270 support member 271 support member body 272 slip restraining member 280 tension member 281 tension Rod 282 Elasticity Adjustment member 291 first plate member 292 second plate member 293 friction plate 294 pressing member 300 elastic member

Japanese Patent Laid-Open No. 10-100955 JP-A-10-184757 JP 2000-017885 A JP 2003-138784 A JP 2004-239411 A JP 2005-180492 A JP 2005-207547 A JP 05-263891 JP 2009-029246 JP 2005-096587 A

Claims (10)

A seismic isolation mechanism provided in a structure having a pair of connection points that are displaced relative to each other,
A linear motion shaft that is a shaft body provided with a spiral groove having a predetermined pitch along the longitudinal direction on the outer peripheral surface, a rotating body guided along the spiral groove, and the rotating body are rotated. A damper having a freely supporting frame;
A pair of connecting members for connecting the linear motion shaft and the frame to a pair of connecting points, respectively;
With
Identification of at least one of the pair of connecting members between one of the linear motion shaft or the frame and the connection location to which one of the linear motion shaft or the frame is connected The specific relative displacement that is the relative displacement of is restricted with the specific force that is the specific force,
Allowing a specific relative displacement when a force exceeding the specific force is applied to the connecting portion to which one of the linear motion shaft or the frame is connected;
A seismic isolation mechanism characterized by that. The specific relative displacement is a relative rotational displacement around a central axis of the linear motion shaft between one of the linear motion shaft or the frame and a connection point;
The seismic isolation mechanism according to claim 1. The linear motion shaft is formed with a male screw at the end,
At least one of the pair of connecting members has a mounting member on which a female screw that fits into the male screw of the linear motion shaft is formed,
The mounting member is fixed to the structure at a connection point;
The specific force is a force generated by a torque around the central axis of the linear motion shaft generated by friction between the mounting member and the linear motion shaft;
The seismic isolation mechanism according to claim 2. The linear motion shaft is formed with an external thread and a flat outer peripheral surface at an end,
At least one of the pair of connecting members includes a female screw fitted to the male screw of the linear motion shaft, a mounting member formed with a contact surface that can contact the outer peripheral surface of the linear motion shaft, A pressing member that presses the contact surface against the outer peripheral surface of the linear motion shaft;
The mounting member is fixed to the structure at a connection point;
The specific force is a force generated by a torque around the central axis of the linear motion shaft generated by friction between the mounting member and the linear motion shaft;
The seismic isolation mechanism according to claim 2. At least one of the pair of connecting members has a shaft member formed with a male screw and a mounting member formed with a female screw that fits the male screw of the shaft member;
One of the shaft member or the mounting member is fixed to one of the linear motion shaft or the frame,
The other of the shaft member or the mounting member is fixed to the structure at a connection location,
The specific force is a force generated by a torque around the central axis of the linear motion shaft caused by friction between the mounting member and the shaft member;
The seismic isolation mechanism according to claim 2. At least one of the pair of connecting members is in contact with a shaft member formed with a male screw and a flat outer peripheral surface, a female screw fitted to the male screw of the shaft member, and the outer peripheral surface of the shaft member. A mounting member that forms a possible contact surface, and a pressing member that presses the contact surface against the outer peripheral surface of the shaft member;
One of the shaft member or the mounting member is fixed to one of the linear motion shaft or the frame,
The other of the shaft member or the mounting member is fixed to the structure at a connection location,
The specific force is a force generated by a torque around the central axis of the linear motion shaft caused by friction between the mounting member and the shaft member;
The seismic isolation mechanism according to claim 2. At least one of the pair of connecting members is a disk member that is a disk-shaped member having a central axis that coincides with the central axis of the linear motion shaft, and the disk member is disposed on both disk-shaped surfaces. A sandwiching member sandwiched from the side of the
One of the disk member or the clamping member is fixed to one of the linear motion shaft or the frame,
The other of the disk member or the clamping member is fixed to the structure at a connection location,
The specific force is a force generated by a torque around the central axis of the linear motion shaft generated by friction between the disk-shaped member and the clamping member;
The seismic isolation mechanism according to claim 2. The specific relative displacement is a relative linear displacement along a central axis of the linear motion shaft between one of the linear motion shaft or the frame and the connecting portion.
The seismic isolation mechanism according to claim 1. At least one of the pair of connecting members is a long member having a fixed end and a free end, and the end surface of the fixed end is separable from a mounting surface provided at a connection location of the structure. A support member that is contacted and restrained from moving in a direction parallel to the mounting surface; and a tension member that pulls the support member in a direction from the free end to the fixed end with a predetermined elastic force,
The support member is fixed to one of the linear motion shaft or the frame on the free end side;
When the specific force causes the free end to be displaced relative to the mounting surface, the elastic force of the tension member causes the support member and one of the linear motion shaft and the frame to be fixed to each other. A force along the central axis of the linear axis;
The seismic isolation mechanism according to claim 8. At least one of the pair of connecting members includes a first plate member having a first surface that is parallel to the central axis of the linear motion shaft and the central axis of the linear motion shaft. And a pressing member that presses the first surface of the first plate member and the second surface of the second plate member with a predetermined force. Have
One of the first plate member or the second plate member is fixed to the structure at the connection location,
The other of the first plate member or the second plate member is fixed to one of the linear motion shaft or the frame,
The specific force is a force along the central axis of the linear motion shaft generated by friction between the first surface and the second surface;
The seismic isolation mechanism according to claim 8.

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