JP4602804B2 - Rotating friction damping device for seismic isolation system - Google Patents

Description

  The present invention relates to a rotational friction damping device for a seismic isolation system used for a detached house building or the like.

For example, as a rotational friction damping device for a seismic isolation system used in a detached house building, a pair of arms are arranged in a V shape with their one ends pivoted together, and the other end of one arm is the base A pivot part with the side, the other arm side of the other arm is a pivot part with the building upper structure side, and a part or all of the pivot part is a rotational friction damping part, for example, A pantograph-type rotational friction damping device has been conventionally provided.
JP 2003-97621 A

  By the way, in the seismic isolation system, in addition to the seismic isolation support function for supporting the upper structure so as to suppress or prevent the vibration during the earthquake from being transmitted to the upper structure of the building through the foundation, the vibration is attenuated during the isolation. Occurs between the foundation and the superstructure after the end of the earthquake, such as a vibration damping function, a restoration function that tries to restore the relative positional relationship of the superstructure and the foundation in the horizontal direction during seismic isolation. Residual displacement correction function that corrects residual displacement is required as a basic function. For this reason, in the conventional system, the number of devices for realizing these functions is increased, the system becomes complicated, and the installation of the device is a little. There is a problem that it tends to be troublesome.

  In view of the above problems, an object of the present invention is to provide a rotary friction damping device for a seismic isolation system that can realize simplification of the seismic isolation system and ease of construction.

The above problem is that a pair of arms are arranged in a V shape with their one ends pivoted together, the other end of one arm is a pivot with the first structure portion, and the other In the rotational friction damping device in which the other end side of the arm is a pivot part with the second structure part side, and a part or all of the pivot part is a rotational friction damping part.
Acts on pivoting parts that approach and separate relatively when vibration is attenuated, generates a biasing force in a direction to separate when these pivoting parts are relatively close, and generates a biasing force in a direction to approach when the relative separation occurs. This is solved by a rotational friction damping device for a seismic isolation system, in which a restoring mechanism for performing the action is incorporated (first invention).

  In this rotational friction damping device, since the pivoting portion that relatively approaches and separates when the vibration is attenuated is used as the working portion for restoration, the restoring mechanism portion is incorporated into the rotating friction damping mechanism portion. In addition to the attenuation function, the restoration function is integrated into the equipment, so that the number of devices that make up the seismic isolation system can be reduced, making it possible to simplify the seismic isolation system and make installation easier. The structure of the device accompanying the aggregation can be simplified, and multiple functions can be realized with a simple structure.

  In the rotational friction damping device according to the first aspect of the present invention, the residual displacement generated between the first structure portion and the second structure portion after the end of vibration is applied to the pivoting portions that relatively approach and separate when the vibration is attenuated. It is preferable that a residual displacement correction mechanism that corrects as a part is incorporated (second invention).

  In this rotational friction damping device, since the pivoting portion that relatively approaches and separates when vibration is attenuated is incorporated as a working portion for correction, the residual displacement correction mechanism portion is incorporated into the rotational friction damping mechanism portion. In addition to the damping function and restoration function in one device, the residual displacement correction function is also integrated to reduce the number of devices that make up the seismic isolation system, thereby simplifying the seismic isolation system and realizing ease of installation. In addition, it is possible to simplify the structure of the device that accompanies function integration, and to realize multiple functions with a simple structure.

More specifically, the above-described problem is that the pair of arms are arranged in a V shape with their one ends pivoted to each other, and the other end of one arm is connected to the first structure portion side. In a rotary friction damping device having a pivoting portion, the other end of the other arm being a pivoting portion with the second structure side, and a part or all of the pivoting portion being a rotational friction damping portion ,
A restoration mechanism is incorporated, and the restoration mechanism is
A rail having one end connected to one of the pivots that relatively approach and separate when vibration is attenuated;
A traveling element provided on the other pivot part, guided by the rail by the approach and separation of the pivot parts at the time of vibration damping, and coming and going along the rail,
This is solved by a rotating friction damping device for a seismic isolation system characterized by comprising a biasing means for biasing the traveling element toward an initial standby position along the rail (third invention).

  This rotary friction damping device uses a pivoting part that relatively approaches and separates when vibration is attenuated, and incorporates a rail, a traveling element, and an urging means to provide a restoring function. The apparatus can have a restoration function with a simple mechanism.

Further, in the third invention, a residual displacement correction mechanism portion is incorporated, and the residual displacement correction mechanism portion is
A threaded rod connected at one end to the runner and extending in a direction along the rail;
A contact portion that is fixed to the rail and through which the screw rod passes, and residual displacement generated between the first structure portion and the second structure portion after the end of vibration is applied to the screw portion of the screw rod. The screwed female screw material may be corrected by moving the runner and the rail relative to each other by screwing or retreating the contact portion as a reaction force portion (fourth invention). ).

  This rotary friction damping device not only uses a pivoting part that relatively approaches and separates when vibration is attenuated, but also uses a rail and a traveling element of the restoring mechanism part and incorporates a screw rod to correct residual displacement. Therefore, the rotational friction damping device can be provided with a residual displacement correction function in addition to a restoration function with a simple mechanism.

  Since the present invention is as described above, simplification of the seismic isolation system and ease of construction can be realized, and multi-functionalization of the rotary friction damping device can be realized with a simple configuration. .

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. The rotational friction damping device 1 for a seismic isolation system of the embodiment shown in FIG. 1 and FIG. 2 is a pantograph type rotational friction damping device provided with two pairs of arms. One end thereof is pivotally connected to each other and arranged in a V shape in the horizontal direction, and the other end of one arm 2 is set as a pivotal portion 7 with the side of the foundation 5 as the first structure portion, and the other end. The other end side of the arm 3 is a pivotal portion 8 with the side of the building upper structure portion 6 as the second structural portion, and some or all of the pivotal portions 4, 4, 7, and 8 are necessary. According to the above, a frictional friction damping part is formed by interposing a friction material and tightened with a bolt or the like. As shown by white arrows in FIGS. 3 (A) and 3 (B), the foundation 5 and the upper structure part 6 When the reciprocally moves in the horizontal direction, forward and reverse rotation occurs in each of the pivot parts 4, 4, 7, and 8, and the machine functions as a rotational friction damping part. Pivotally connected portions which may act to inhibit its rotation, is adapted to damp vibrations.

  The rotational friction damping device 1 includes a restoring mechanism 9 and a residual displacement correcting mechanism 10.

  That is, the restoring mechanism portion 9 acts on the pivoting portion that relatively approaches and separates when the vibration is attenuated, generates a biasing force in a direction to separate when the pivoting portion is relatively approached, and approaches the pivoting portion when the vibration is relatively separated. In this embodiment, the pivoting portion 7 between the arms 2 and 2 and the base 5 side, and the arms 3 and 3 and the upper structure portion 6 side are provided. The pivoting portion 8 is a pivoting portion that relatively approaches and separates when vibration is attenuated, and one end portion of the rail 11 made of an upward-opening channel is formed on the upper surface side of any one of the pivoting portions 8. It is rotatably connected and the rail 11 extends horizontally toward the other pivot 7.

  Further, a traveling element 12 is provided on the upper surface side of the other pivot part 7, and the traveling element 12 is disposed in a groove of the rail 11 and pivoted through a slit 13 provided in the bottom wall of the rail 11. It is connected to the connecting portion 7 so that it can come and go in the groove of the rail 11 by approaching and separating the connecting portions 7 and 8 from each other.

  And in the groove | channel of the rail 11, the receivers 14 and 14 are provided in the position fixed state with respect to the rail 11 so that the distance from the traveling element 12 may be put on both sides of the traveling element 12, and the traveling element 12 Rubber elastic members 15 and 15 as urging means are compressed and loaded between one receiver 14 and between the traveling element 12 and the other receiver 14, respectively. 2 is closed by an elastic material stiffening lid 17 as shown in FIG. 2 (a), and by the cooperation of the elastic materials 15 and 15, as shown in FIG. At the time of relative approach of 8 (open arrow), an urging force (black arrow) is generated in a direction to separate the pivots 7 and 8, and as shown in FIG. Arrow), an urging force (black arrow) in the approaching direction is generated, and the traveling element 12 is It is adapted to urge toward the initial standby position along the 11.

  On the other hand, the residual displacement correction mechanism unit 10 uses the pivoting portion that relatively approaches and separates the residual displacement generated between the foundation 5 and the upper structure portion 6 after the end of vibration as the reaction force portion. In this embodiment, similarly, the pivot 7 between the arms 2 and 2 and the foundation 5 and the pivot 8 between the arms 3 and 3 and the upper structure 6 are vibrated. A pivotal portion that relatively approaches and separates when it is damped, and is configured using the rail 11, the traveling element 12, and the receivers 14 and 14.

  That is, in the groove of the rail 11, screw rods 16, 16 are provided through elastic members 15, 15 on both sides of the runner 12, and one end side of the screw rods 16, 16 is connected to the runner 12. Each screw rod 16, 16 extends to the side of the receivers 14, 14, and the other end side penetrates the receivers 14, 14.

  When a residual displacement as shown in FIG. 4 (a) occurs between the foundation 5 and the upper structure 6 at the end of the earthquake, the tip of one screw rod 16 extending beyond the receiver 14 is used. As shown in FIG. 4B, the nut 18 as the female screw material is screwed together, and the nut 18 is screwed forward with the receiver 14 as the contact portion. Then, the traveling element 12 is pulled by the screw rod 16 and moves in the rail 11, the pivot portions 7 and 8 are relatively displaced, the upper structure portion 6 is moved, and the residual displacement is corrected. .

  As shown in FIG. 5, each rotational friction damping device is provided with a plurality of rotational friction damping devices 1... Having different damping directions by 90.degree. It is possible to return the upper structure portion 6 to an appropriate position and orientation with respect to the foundation 5 by correcting the residual displacement in the same manner as described above in 1. The nut 18 may be screwed into any necessary male threaded rod at the time of residual displacement correction, or may be provided in the threaded rod in advance.

  In the above-described rotational friction damping device 1 for a seismic isolation system, a restoring mechanism is included in the rotational friction damping mechanism portion with the pivoting portions 7 and 8 that relatively approach and leave when the earthquake vibration is attenuated as acting portions for restoration. In addition to the damping function, the restoration function and the residual displacement correction mechanism are integrated into a single device, reducing the number of devices that make up the seismic isolation system. Simplification of the system and ease of construction can be realized, and the structure of the device associated with function integration can be simplified, so that multiple functions can be realized with a simple structure.

  In addition, using the joints 7 and 8 that relatively approach and leave when vibration is attenuated, the rail 11 and the traveling element 12 and the elastic members 15 and 15 as urging means are incorporated to provide a restoring function. Therefore, the rotational friction damping device 1 can have a restoring function with a simple mechanism.

  In particular, in this embodiment, in the incorporation of the residual displacement correction mechanism, not only the pivotal portions 7 and 8 that relatively approach and separate when vibration is attenuated, but also the rail 11 and the traveling element of the restoring mechanism 9 are used. 12, the screw rods 16 and 16 and the receivers 14 and 14 as contact portions are incorporated to provide a residual displacement correction function. The residual displacement correction function can be provided, and the residual displacement correction work can be easily performed by the screw mechanism.

  In addition, by providing the rotational friction damping device 1 with a restoring function as described above, when the base isolation bearing portion is a rolling base isolation support, it is also possible to use a flat plate as a plate for rolling the sphere. .

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, the case where the residual displacement correction mechanism portion by the screw mechanism having a specific configuration is incorporated is shown, but the residual displacement correction mechanism portion by another screw mechanism may be incorporated, or the screw mechanism may be incorporated in the screw mechanism. An unreliable residual displacement correction mechanism may be incorporated.

  In the above embodiment, the rotational friction damping device has both the restoration function and the residual displacement correction function. However, the residual displacement correction function may be omitted and only the restoration function may be provided. . In the above embodiment, the rubber-like elastic material is used as the urging means for constructing the restoring mechanism section. However, a coil spring may be used as the urging means.

  In the above-described embodiment, the pivot 7 between the arms 2 and 2 and the foundation 5 and the pivot 8 between the arms 3 and 3 and the upper structure 6 are relative to each other when vibration is attenuated. However, the other pivotal parts, for example, the pivotal parts 4 and 4 may be selected as pivotal parts that relatively approach and separate when vibration is attenuated. .

  Further, in the above-described embodiment, the case where the rotary friction damping device is applied to the two-pair pantograph type rotary friction damping device 1 is shown. However, the rotary friction damping device can also be applied to the one-pair rotary friction damping device. . Furthermore, the rotational friction damping device of the present invention is not limited to a building, and may be a rotational friction damping device for a seismic isolation system used for various structures.

1 shows a rotational friction damping device of an embodiment, in which FIG. 1 (a) is a plan view of the rotational friction damping device shown by omitting the restoring mechanism and the residual displacement correcting mechanism, and FIG. It is a top view of the rotational friction damping apparatus in which the displacement correction mechanism part was incorporated. FIG. 1A is a perspective view showing parts constituting the restoring mechanism portion and the residual displacement correcting mechanism portion in a separated state, and FIG. 1B is a perspective view of the rail viewed from below. FIGS. 1A and 1B are plan views showing the operating state of the rotary friction damping device at the time of an earthquake. FIGS. 1A and 1B are plan views sequentially showing a method for correcting residual displacement. It is a top view which shows an example of arrangement | positioning of the rotational friction damping apparatus in a building.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rotary friction damping device for seismic isolation systems 2 ... Arm 3 ... Arm 5 ... Foundation (1st structure part)
6 ... Upper structure part (second structure part)
DESCRIPTION OF SYMBOLS 7 ... Pivoting part 8 ... Pivoting part 9 ... Restoration mechanism part 10 ... Residual displacement correction mechanism part 11 ... Rail 12 ... Running element 13 ... Slit 14 ... Receiving (contact part)
15 ... Elastic material (biasing means)
16 ... screw rod 18 ... nut (female screw member)

Claims (3)

A pair of arms are arranged in a V shape with their one ends pivoted to each other, the other end of one arm is the pivot with the first structure portion, and the other end of the other arm In the rotational friction damping device with the second structure part as a pivot part and a part or all of the pivot part as a rotational friction damping part,
Acts on pivoting parts that approach and separate relatively when vibration is attenuated, generates a biasing force in a direction to separate when these pivoting parts are relatively close, and generates a biasing force in a direction to approach when the relative separation occurs. It has a built-in restoration mechanism that works ,
A residual displacement correction mechanism that corrects the residual displacement generated between the first structure and the second structure after the end of the vibration by using the pivoting portions that relatively approach and separate when the vibration is attenuated as reaction force portions. Built-in rotary friction damping device for seismic isolation systems. The restoration mechanism section is
A rail having one end connected to one of the pivots that relatively approach and separate when vibration is attenuated;
A traveling element provided on the other pivot part, guided by the rail by the approach and separation of the pivot parts at the time of vibration damping, and coming and going along the rail,
2. The rotational friction damping device for a seismic isolation system according to claim 1, further comprising an urging means for urging the traveling element toward an initial standby position along the rail. The residual displacement correction mechanism is
A threaded rod connected at one end to the runner and extending in a direction along the rail;
A contact portion that is fixed to the rail and through which the screw rod passes, and residual displacement generated between the first structure portion and the second structure portion after the end of vibration is applied to the screw portion of the screw rod. The screwed female screw material is screwed or retreated with the contact portion as a reaction force portion, and the traveling element and the rail are moved relative to each other to correct the screw. Rotary friction damping device for seismic isolation systems.

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