JP6064224B2 - Seismic isolation material - Google Patents

Description

  The present invention relates to a seismic isolation member that is provided between a seismic vibration generating surface side and a seismic isolation target member side so that a seismic isolation effect is exhibited when an earthquake occurs.

  Conventionally, for example, in a mechanism for seismic isolation with respect to an earthquake, a sphere located on the seismic isolation target member side is appropriately connected to a top surface of a planar circular plate-like base located on the seismic vibration generating surface side through an appropriate spring. The seismic isolation system is configured so as to have a so-called seismic isolation effect that prevents the vibration from being transmitted to the seismic isolation target side by rolling the ball so that it can roll when the earthquake occurs. There are members (see, for example, Patent Document 1).

JP 2006-118288 A

  The seismic isolation member as described above can cope with ordinary earthquakes, but cannot cope with earthquakes with long-period ground motion.

  That is, there are short-period ground motion (around 1 second) and long-period ground motion (5 seconds or more) in the earthquake. It is possible to cope with short-period ground motions that are fine rolls. However, if a long-period ground motion, which is extremely slow and does not cause a large roll, occurs, the amplitude of the long-period ground motion will cause the sphere to jump out of the dish-shaped base, and the large amplitude cannot be accommodated. In addition, when a size that can be accommodated is used, the sphere returns to its original position, and smoothness is impaired.

  For this reason, conventional seismic isolation material manufacturers have had to develop and manufacture seismic isolation members for both short-period ground motion and long-period ground motion, which inevitably resulted in rising costs related to development, manufacturing, and installation costs. Forced to accompany sex.

  The present invention is intended to provide a new product called a “seismic isolation member” in a new form, which is intended to eliminate such a conventional problem.

According to the present invention, the cylindrical cavity 1a is formed at the center and the upward recesses 7 for seismic isolation control having concave mirror shapes at the four corners with the cylindrical cavity 1a as the center are formed. The lower base 1 is attached to the upper surface of the seismic vibration generating surface side A, and the cylindrical space 2a is formed in the central portion, and at the four corners of the cylindrical space 2a, concave mirrors are formed at the four corners. The upper base body 2 formed with the downward concave portion 8 is attached to the lower surface of the seismic isolation target member side B with both the cylindrical cavities 1a and 2a being coaxial and opposed vertically. The upper and lower ends of the control linkage 3 made of a stretchable material such as rubber for connecting to the upper base 2 are elastically extended in the cylindrical cavities 1a and 2a. Mounting, and further, a lower slider 9 having a rotatable sphere 9a and an upper slider having a rotatable sphere 10a. 10 is positioned in a state in which it is elastically pressed between each of the upward concave portion 7 and the downward concave portion 8. At the same time, in order to link each seismic isolation slider 12 with the control linkage 3 located at the center thereof, a synchronization support frame 13 is attached to the seismic isolation member in a bundled manner in these folding halves. Related.

  According to the present invention, as described in claim 2, the lower base body 1 in which the cylindrical space 1a having the jaw-shaped peripheral edge 1b at the upper end portion of the opening is formed in the central portion is formed on the upper surface of the seismic vibration generating surface side A. The upper base body 2 formed in the center with a cylindrical cavity 2a having a jaw-shaped peripheral edge 2b near the lower end of the opening is opposed to each other so that the cylindrical cavities 1a and 2a are coaxial. The control base 3 is attached to the lower surface of the seismic isolation target member side B, provided with spring receiving discs 3a and 3b at the upper and lower ends, and made of a stretchable material such as rubber. The upper coil 2 is positioned so as to penetrate through the cylindrical cavities 1a and 2a of the upper base 2, and the second coil spring 5 is interposed between the upper end spring receiving plate 3a and the upper peripheral edge 2b of the upper base 2. The third coil spring 6 is interposed between the spring receiving plate 3b at the lower end and the jaw-shaped peripheral edge 1b of the lower base 1 Therefore, the first coil spring 4 is attached between the spring receiving discs 3a and 3b so as to support elastically and withdrawable and cover the control linkage 3 over the entire length, if necessary. The two-coil spring 5 and the third coil spring 6 have different elastic strengths, and the elasticity of the two coil springs 5 and the control linkage 3 itself is configured not to exceed the elastic strength of the first coil spring 4 and the control linkage 3 itself. The seismic isolation member according to Item 1 is an embodiment.

  In the present invention, as the mirror surface of the upward concave portion 7 and the downward concave portion 8, a central concave portion a for stabilizing a fixed position with a spherical body is formed in the central portion, and a plurality of concentric circles are successively connected to the central concave portion. The seismic isolation member according to claim 1, wherein the required number of arc-shaped grooves b for spherical transition are provided continuously.

  The present invention provides a seismic isolation system according to any one of claims 1 to 3, wherein the seismic vibration generating surface side A is the ground, and the seismic isolation target member side B is a construction member such as a building. Materials.

Since the present invention employs the configuration as set forth in claim 1, it is possible to achieve a good seismic isolation function despite the extremely simple configuration. The upper and lower ends of the control linkage 3 made of a stretchable material such as rubber for connecting the lower base 1 and the upper base 2 are elastic in the cylindrical cavities 1a and 2a. By installing the actuator so that it can be stretched freely, seismic isolation can be made possible even for trembling vibrations such as long-period ground motion based on the elastic stretching action of the control linkage 3. The in-situ return operation after the earthquake is also performed very smoothly.

  Furthermore, a seismic isolation slider comprising a lower slider 9 having a rotatable sphere 9a and an upper slider 10 having a rotatable sphere 10a connected via a coil spring 11 at a predetermined interval. The tool 12 is positioned in a state where it is elastically pressed between each of the upward recess 7 and the downward recess 8 described above, and each of the seismic isolation sliders 12 and the control linkage 3 located at the center thereof are provided. Since the synchronization support frame た め 13 is constructed so as to be attached together in these folding halves for linking, the function of the lower part of each seismic isolation sliding tool 12 is followed by the function of the upper part. Based on this function, it can adapt to seismic isolation for both short-period ground motion and long-period ground motion.

And this invention is used as a seismic isolation member for various structures on the surface of the ground such as a pier of a building or a bridge, or as a seismic isolation material for an intermediate material or foundation of a tombstone or a stone lantern, and a showcase In addition, it can be used as a seismic isolation member for various kinds of shelves, artworks on the floor or computers.

Since the present invention adopts the configuration as described in claim 2, the control linkage 3 connected to the lower and upper bases 1 and 2 is extremely smooth in the expansion and contraction operation with respect to the shaking motion at the time of the occurrence of the earthquake. The seismic isolation action is performed with remarkable stability.

  Further, the second coil spring 5 and the third coil spring 6 are made to have different elastic strengths, and the elasticity of both does not exceed the elastic strength of the first coil spring and the control linkage 3 itself. Therefore, in the case of weak long-period ground motion, the seismic isolation action based on expansion / contraction by either one of the second coil spring 5 and the third coil spring 6 is exerted, and in the case of stronger ground motion, the other coil spring In the case of a strong earthquake motion, the control linkage 3 itself exhibits the elasticity, so that a step-by-step seismic isolation action linked to the strength of the earthquake motion is made. .

The present invention has a configuration as described in claim 3, that is, as a mirror surface of the upward concave portion 7 and the downward concave portion 8, a central concave portion a for stabilizing a fixed position with a sphere is formed in the central portion, and concentrically with this. By configuring a plurality of sphere transition arc-shaped grooves b, which are successively connected, to be provided in a required number,
When moving over from the central recess a to the outer circular arc-shaped groove b for sphere transition, and further over to the next stage of the slider-transfer arc-shaped groove 3b, the horizontal movement resistance and the overcoming movement are overcome. Therefore, two resistance forces, ie, a vertical movement resistance, will work. And such a movement resistance force will act as a resistance force for the seismic isolation action with respect to a long period ground motion, and a favorable seismic isolation effect is show | played.

  The present invention is configured as described in claim 4, that is, the seismic vibration generating surface side A is the ground, and the seismic isolation target member side B is a construction member such as a building. It is widely implemented.

It is a longitudinal cross-sectional view of the seismic isolation member which concerns on this invention. It is a simple top view for explanation of a seismic isolation member concerning the present invention. It is a longitudinal section for explanation showing the state where the seismic isolation action based on the generation of short-period ground motion acted on the seismic isolation member according to the present invention. It is a longitudinal section for explanation showing the state where the seismic isolation action based on generation of long-period ground motion acted to the seismic isolation member concerning the present invention. It is sectional drawing for description which expanded and represented the surface of the recessed part for seismic isolation control (upward and downward).

  The drawing shows a state in which the seismic isolation member according to the present invention is attached between the seismic vibration generating surface side A and the seismic isolation target member side B.

  In FIG. 1, reference numeral 1 denotes a lower base body having a cylindrical space 1a formed at the center thereof, which is fixed to the seismic vibration generating surface side A. In addition, a jaw-shaped peripheral edge 1b is provided at a portion near the upper end of the opening of the cylindrical space 1a, and a trumpet-shaped opening 1c is formed continuously therewith.

  Reference numeral 2 denotes an upper base having a cylindrical space 2a formed at the center thereof, which is fixed to the seismic isolation target member side B. In addition, a jaw-shaped peripheral edge 2b is provided at a portion near the lower end of the opening of the cylindrical space 2a, and a trumpet-shaped opening 2c is formed continuously therewith. The trumpet-shaped openings 1c and 2c are provided so as not to hinder the expansion / bending deformation of the control linkage 3 described later.

  Further, the lower base body 1 and the upper base body 2 include a cylindrical cavity 1a and 2a that are coaxial with each other and include an upward recess 7 for seismic isolation control and a downward recess 8 that will be described later. In this state, they are fixed to the seismic vibration generating surface side A and the seismic isolation target member side B, respectively, in a state of being vertically symmetrical and having a predetermined interval.

  Further, the fixing means for the above-mentioned bases 1 and 2 to the seismic vibration generating surface side A and the seismic isolation target member side B are mainly intended to be fixed by an adhesive. However, the present invention is not limited to this, and may be configured to depend on, for example, screwing, wedge fastening, or other appropriate fixing means.

3 is a control linkage made of a flexible material such as a rubber material, and provided with spring receiving discs 3a and 3b at its upper and lower ends, and between the spring receiving discs 3a and 3b for control purposes. The first coil spring 4 loosely fitted so as to cover the continuous rod 3 over its entire length is interposed, and the lower end and the upper end thereof are each elastically received. The first coil spring 4 is involved in the reinforcement of the warp elasticity of the control linkage 3 and its restoration. Together, the first coil spring 4 enhances the warp strength and the speed of restoration based on its elasticity. It is configured as shown. However, the first coil spring 4 may be configured to omit this. In this case, the restoration of the warping elasticity of the control linkage 3 depends on the restoring force of the control linkage 3 itself.

  Reference numeral 5 denotes a second coil spring interposed near the upper end of the control linkage, and reference numeral 6 denotes a third coil spring interposed near the lower end of the control linkage. It is configured so as to be elastically interposed between the peripheral edge 2b and between the spring receiving disc 3b and the jaw-shaped peripheral edge 1b. The second and third coil springs 5 and 6 are provided in such a form as to be located outside the first coil spring 4 described above. Accordingly, the control linkage 5 is configured to be elastically and vertically movable supported at the upper and lower portions.

  By the way, the control linkage 3 and the first to third coil springs 3.4.5 described above are configured to have different elastic strengths. For example, if it shows as one case, it sets so that it may be set as the 2nd coil spring 5, the 3rd coil spring 6, the control linkage 3, and the 1st coil spring 4 in order with weak elasticity. More specifically, the elastic strengths of the second coil spring 5 and the third coil spring 6 are made different from each other, and the elasticity of the two coil springs is the same as that of the first coil spring and the control linkage 3 itself. Set not to exceed. Thereby, elastic deformation is generated from a portion having low elasticity due to the occurrence of an earthquake, and a step-by-step seismic isolation effect exhibiting an action as described later is exhibited.

  Next, the essential structure of the seismic isolation member according to the present invention is as follows. This is the above-described lower-side base body 1, but with the cylindrical space 1 a as the center, in other words, with the control connection 3 made of a flexible material such as a rubber material as the center, the radiation lines toward the four corners. In addition, seismic isolation control upward recesses 7 having a concave mirror shape are formed at four equal positions.

  On the other hand, although it is the above-mentioned upper-side base body 2, it is a dissipative line shape toward the four corners centering on the cylindrical space 2a, in other words, centering on the control rod 3 made of a flexible material such as rubber. In addition, seismic isolation control downward recesses 8 having a concave mirror shape are formed at four equal positions. Accordingly, the lower base 1 and the upper base 2 are configured so as to be positioned symmetrically in the vertical direction.

  9 is a lower slider with a rotatable sphere 9a attached to the lower end, and 10 is an upper slider with a rotatable sphere 10a attached to the upper end, both of which are connected via a coil spring 11 at a predetermined interval. Therefore, one seismic isolation tool 12 is formed.

  The lower slider 9 is movable while maintaining the state in which it is elastically pressed against the upward recess 7 for seismic isolation control and the upper slider 10 is pressed against the downward recess 8 respectively. It is held in such a form.

  As shown in FIG. 2, reference numeral 13 designates a support frame for synchronization. All of these operations are performed by linking each of the seismic isolation sliders 12 and the control linkage 3 located at the center thereof. It is for making it link so that the synchronicity may be maintained. In the embodiment shown in the drawings, the stable support frame rod 13 is stably held by being fitted in close contact with the coil spring 11 of each seismic isolation sliding tool 12, Other forms are acceptable.

  By the way, in the state shown in FIG. 1, when a direct earthquake and a short period ground motion, which are normal earthquakes, are detected, the synchronization support frame 13 is fixed at the central part of the seismic isolation sliding tool 12, As for the earthquake vibration, only the lower half of the seismic isolation tool 12 is shaken (see FIG. 3), thereby providing the seismic isolation effect. At this time, the lower half of the control linkage 3 is bent in the same direction, and the restoring force based on the elasticity of the control linkage 3 prompts the home position return of the seismic isolation tool 12.

  Further, in the case of a direct type earthquake, the seismic isolation of the coil spring 11 is achieved based on the vertical swing motion (expandable swing motion) of the coil spring 11.

  In this way, a short-period roll accompanying a short-period ground motion that usually occurs frequently, and a vertical shake in the case of a direct earthquake, and a seismic isolation action for an earthquake that involves both of them are exhibited.

  Next, when a slow large lateral vibration based on long-period ground motion occurs, as shown in FIG. 3, the lower half of the seismic isolation tool 12 is more than the outer edge of the upward recess, as shown in FIG. Therefore, the seismic power of the earthquake brings the upper half of the seismic isolation sliding tool 12 downward toward the outer periphery of the recess 8 as shown in FIG. As a result, a seismic isolation action corresponding to the large amplitude of the earthquake is produced.

  That is, when a slow large lateral vibration based on long-period ground motion occurs, when the lower half of the seismic isolation sliding tool 12 approaches the outer edge of the upward recess, corresponding to the magnitude of the swing Since no further swinging motion is possible, the seismic power of the earthquake continues to cause a movement that brings the upper half of the seismic isolation slider 12 toward the outer periphery of the downward recess 8 (see FIG. 4), As a result, a seismic isolation action corresponding to the large amplitude of the earthquake is achieved.

  At this time, the control linkage 3 is also stretched based on its own elasticity and the extension force of each spring hung on it. Accordingly, a repulsive force that promotes a return to the home position with respect to the seismic isolation sliding tool 12 is stored. Based on these actions, the execution of the seismic isolation action with the action of the downward recess 8 described above in the long-period ground motion is permitted.

  By the way, the above-described upward recess 7 for seismic isolation control and the downward recess 8 are the same, but in the embodiment shown in the drawings, a central recess a for stabilizing the fixed positions of the sphere 9a and the sphere 10a is formed at the center. A concave mirror is formed by forming a required number of a plurality of sphere transition arc-shaped grooves b concentrically and successively formed in the central portion (see FIG. 5).

By adopting such a configuration, the slider 12 moves from the central recess a which is the central part of the base for seismic isolation control to move over the circular arc transition groove b on the outer side sequentially. Become.

Therefore, the operation performed by the seismic isolation member according to the present invention moves over from the central recess a to the spherical transition arc-shaped groove b on the outer side, and further to the next-stage slider-transfer arc-shaped groove 3b. When moving over, two resistance forces, a horizontal movement resistance and a vertical movement resistance for overcoming, will work. Such movement resistance acts as resistance for seismic isolation against long-period ground motion. Accordingly, the seismic isolation strength can be enhanced.

  By the way, the present invention is mainly intended for use as a seismic isolation member for general structures by using the seismic vibration generating surface side A as the ground surface and the seismic isolation target member side B as a construction member such as a building. . That is, when the present invention is used as a seismic isolation member for a structure such as a building, for example, it is interposed between the seismic vibration generating surface side A and the seismic isolation target member side B, and the number of such interposition points is a required number. Depending on the arrangement, the structure is seismically isolated.

  However, the seismic vibration generating surface side A can be used as a floor of a building, and the seismic isolation target member side B can be a protected object such as art or a computer.

  That is, the present invention can be used as a seismic isolation member for, for example, a work of art or computer equipment placed on the floor, in addition to the use for seismic isolation for a construction member such as a building.

A Earthquake vibration side
B Seismic isolation object side 1 Lower substrate
1a Cylindrical void
1b jaw periphery
1c Trumpet-shaped opening 2 Upper substrate
2a Cylindrical void
2b jaw periphery
2c Trumpet-shaped opening 3 Control linkage
3a Spring receiving plate
3b Spring receiving plate 4 First coil spring 5 Second coil spring 6 Third coil spring
7 Seismic isolation control upward recess 8 Seismic isolation control downward recess 9 Lower slider
9a sphere
10 Upper slider
10a sphere
11 Coil spring
12 Seismic isolation tool
13 Support frame for synchronization
a Center recess
b Arc transition groove for spherical transition

Claims (4)

A lower base body (1) in which a cylindrical cavity (1a) is formed in the center and an upward recess (7) for seismic isolation control is formed at the four corners of the cylindrical cavity (1a). ) Is attached to the upper surface of the seismic vibration generating side (A),
An upper base body (2) having a cylindrical cavity (2a) formed in the center and a seismic isolation control downward recess (8) having a concave mirror shape at the four corners around the cylindrical cavity (2a). ) Is attached to the bottom surface of the seismic isolation target member side (B) in a state where both the cylindrical cavities (1a, 2a) are coaxial and symmetrically opposed to each other,
The upper and lower ends of the control linkage (3) made of a stretchable material such as rubber for connecting the lower base (1) and the upper base (2) are connected to the two cylindrical spaces (1a , 2a) to be elastically stretchable within
Further, the lower slider (9) having a rotatable sphere (9a) and the upper slider (10) having a rotatable sphere (10a) are kept at a predetermined interval via a coil spring (11). And a seismic isolation tool (12) formed by connecting the upper and lower recesses (7) and (8) in a state of being elastically pressed against each other,
In order to link each seismic isolation tool (12) and the control linkage (3) located in the center thereof, a synchronizing support frame (13) is attached in a bundled manner in these folding halves. Seismic isolation member. A lower base (1) with a cylindrical cavity (1a) with a jaw-shaped peripheral edge (1b) at the top end of the opening is attached to the upper surface of the seismogenic surface (A). The upper base body (2) in which a cylindrical cavity (2a) having a jaw-shaped peripheral edge (2b) is formed at the lower end of the section is formed in the center, and the cylindrical voids (1a, 2a) are coaxial. Installed on the bottom surface of the seismic isolation target member side (B)
The upper and lower bases (1) and (2) are connected to the control base (3) made of a stretchable material such as rubber with spring receiving plates (3a and 3b) at the upper and lower ends. ) To penetrate through each cylindrical space (1a, 2a), and a second coil spring (between the upper end spring receiving plate (3a) and the upper peripheral body (2) jaw periphery (2b). 5) and a third coil spring (6) between the spring receiving plate (3b) at the lower end and the jaw-shaped peripheral edge (1b) of the lower side base (1), so that it is elastically pulled out. Support freely,
If necessary, the first coil spring (4) is attached between the spring receiving plates (3a and 3b) so as to cover the control linkage (3) over the entire length.
The second coil spring (5) and the third coil spring (6) are made to have different elastic strengths, and the elasticity of both is the elastic strength of the first coil spring (4) and the control linkage (3) itself. The seismic isolation member according to claim 1, wherein the seismic isolation member is configured not to exceed the length. As the mirror surface of the upward concave portion (7) and the downward concave portion (8), a central concave portion (a) for stabilizing the fixed position with the sphere is formed in the central portion, and a plurality of arcs for spherical transition successively concentrically with this central concave portion (a) are formed. The seismic isolation member according to claim 1, wherein the required number of grooves (b ...) are provided continuously. The seismic isolation member according to any one of claims 1 to 3, wherein the seismic vibration generating surface side (A) is the ground, and the seismic isolation target member side (B) is a construction member such as a building.