JP2008116041A - Laminate support body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminate support body which can be disposed and so on at a low cost and can exhibit a large damping force. <P>SOLUTION: A plastic fluid material 30 constituted of an elastoplastic body is injected in an elastic body hollow part 28 of a laminate elastic body 16. Further, a plurality of particle-shaped hard fillers which are constituted of hard materials which are considered to be rigid bodies with respect to the plastic fluid material 30 are filled in the plastic fluid material 30 so as to satisfy a predetermined volume fill rate. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a laminated support.

  Conventionally, a laminated support in which soft plates such as rubber and hard plates such as metal are alternately laminated has been used as a support for seismic isolation devices. Such laminated supports include, for example, one in which a hollow portion is formed at the center and a metal plug is press-fitted therein.

  As this metal plug, a lead-made plug having a stable damping performance is often used. However, lead requires a large cost when discarded. For this reason, Patent Document 1 proposes a seismic isolation device in which a viscous material and a solid material are sealed in a hollow portion instead of lead, and a gap between the solid materials is filled with the viscous material. Examples of the substance include partition members, columnar bodies, and granular bodies.

Moreover, in patent document 1, although liquid bodies, such as oil, are illustrated as a viscous body combined with a granular hard material, in a long-term use, a hard member will precipitate in a liquid body and a dispersed state will deteriorate. For this reason, the attenuation characteristics partially change, and stable attenuation performance cannot be exhibited. Further, the liquid material is not suitable in that it has a small flow resistance and obtains a large damping force.
Japanese Patent Publication No. 7-84815

  In view of the above facts, an object of the present invention is to obtain a laminated support that can be disposed of at low cost and can exhibit a large damping force.

  In the invention according to claim 1, a laminated elastic body in which rigid plates having rigidity and elastic plates having elasticity are alternately laminated in a predetermined lamination direction, and a hollow portion is formed in the lamination direction; It has a plastic fluid material made of an elasto-plastic material and injected into the hollow portion, and a hard filler material filled in the plastic fluid material.

  Therefore, when the laminated support is installed on the supported member, the load of the support member is supported by the laminated elastic body. In particular, since the laminated elastic body is configured by alternately laminating rigid plates and elastic plates, high rigidity for supporting the support member can be obtained.

  A plastic fluid is injected into the hollow portion of the laminated elastic body, and the plastic fluid is filled with a hard filler. As a result, the plastic fluid material contacts not only the inner surface of the hollow part but also the surface of the hard filler, and the contact area is widened, so that the damping characteristic during shear deformation of the laminated elastic body is improved, and the large damping is achieved. Power is obtained. That is, when the laminated elastic body undergoes shear deformation, the hard fillers move with each other. At this time, a large damping force can be obtained by moving (flowing) between the hard fillers. It becomes.

  In particular, in the present invention, since the plastic fluidized material is composed of an elastic-plastic material, the dispersion state of the hard filler is stabilized and precipitation of the hard filler is preferably prevented (preferably not precipitated). By preventing the precipitation of the hard material as described above, the dispersion state of the hard filler in the plastic fluidized material is hardly changed, and the damping characteristic is stabilized. Therefore, a desired damping characteristic can be obtained even if the volume filling rate of the hard filler is lowered.

  In addition, since this laminated support does not use materials such as lead that require high costs, it can be discarded at low cost.

  Note that “filling” in the present application includes mixing a hard filler into a plastic fluidized material. That is, a mixture or a string of plastic fluid and hard filler is injected into the hollow portion of the laminated elastic body.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, a shear yield stress τy of the plastic fluidized material is 0.1 MPa ≦ τy ≦ 10 MPa.

  The plastic fluidized material has a greater damping effect as the shear yield stress τy is increased, but if it is too large, filling (mixing) of the hard filler becomes difficult. Conversely, as the shear yield stress τy is reduced, the plastic fluidized material can be greatly plastically deformed, and the filling (mixing) of the hard filler is facilitated, but the damping effect is reduced.

  Therefore, a large damping performance can be obtained by setting the shear yield stress τy of the plastic fluid material to 0.1 MPa or more.

  Further, by setting the shear yield stress τy to 10 MPa or less, the plastic fluidized material can be greatly plastically deformed, and the filling (mixing) of the hard filler is facilitated.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the volume filling rate of the hard filler is 25% to 74%.

  The invention according to claim 4 is the invention according to claim 3, wherein the volume filling rate of the hard filler is further 50% to 74%.

  The “volume filling rate” is a percentage of the volume of the hard filler relative to the sum of the volume of the plastic fluid and the volume of the hard filler. By setting the volume filling rate of the hard filler to 25% or more, it is possible to secure a wide contact area between the plastic fluid material and the hard filler and increase the resistance force at the time of flow. Obtainable.

  Furthermore, when the volume filling rate of the hard filler is 50% or more, a wider contact area between the plastic fluidized material and the hard filler can be secured, and a particularly large damping force can be obtained. In order to set the volume filling rate of the hard filler to 50% or more, it is possible to adopt a configuration in which the number of hard fillers per unit volume is increased. In this configuration, the interval between the hard fillers is narrowed. Therefore, a larger damping force can be obtained.

  Further, by setting the volume filling rate to 74% or less, the contact between the hard fillers is reduced and the movement of the hard fillers is facilitated, so that stable damping performance can be exhibited.

  The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the hard filler is a granular body formed in a granular form.

  By making the hard filler into a granular material, it becomes easy to improve the dispersion state of the hard filler in the plastic fluidized material, and the damping performance is stabilized.

  The invention according to claim 6 is characterized in that, in the invention according to claim 5, the size of the granular material is 0.001 mm ≦ Lave ≦ 1.0 mm in terms of the average value Lave of the representative length L. And

  By setting the size of the granular material to 0.001 mm ≦ Lave ≦ 1.0 mm in terms of the average value Lave of the representative length L, high attenuation performance can be obtained.

  In the invention described in claim 7, in the invention described in claim 6, the size of the granular material is 0.003 mm ≦ Lave ≦ 0.3 mm in terms of the average value Lave of the representative length L. Features.

  By setting the size of the granular material to 0.003 mm ≦ Lave ≦ 0.3 mm in terms of the average value Lave of the representative length L, higher attenuation performance can be obtained.

  In the invention according to claim 8, a laminated elastic body in which a rigid plate having rigidity and an elastic plate having elasticity are alternately laminated in a predetermined lamination direction, and a hollow portion is formed in the lamination direction; A plastic fluidized material made of a non-hardening elastic perfect plastic material and injected into the hollow portion, and a hard filler filled in the plastic fluidized material, and a shear yield stress τy of the plastic fluidized material Is 0.1 MPa ≦ τy ≦ 10 MPa, and the volume filling factor of the hard filler is 25% to 74%.

  Therefore, when the laminated support is installed on the supported member, the load of the support member is supported by the laminated elastic body. In particular, since the laminated elastic body is configured by alternately laminating rigid plates and elastic plates, high rigidity for supporting the support member can be obtained.

  A plastic fluid is injected into the hollow portion of the laminated elastic body, and the plastic fluid is filled with a hard filler. As a result, the plastic fluid material contacts not only the inner surface of the hollow part but also the surface of the hard filler, and the contact area is widened, so that the damping characteristic during shear deformation of the laminated elastic body is improved, and the large damping is achieved. Power is obtained. That is, when the laminated elastic body undergoes shear deformation, the hard fillers move with each other. At this time, a large damping force can be obtained by moving (flowing) between the hard fillers. It becomes.

  In particular, in the present invention, the plastic fluidized material is composed of a non-curing elastic perfect plastic material, so that the dispersion state of the hard filler is stabilized and precipitation of the hard filler is prevented (preferably not precipitated). ). By preventing the precipitation of the hard material as described above, the dispersion state of the hard filler in the plastic fluidized material is hardly changed, and the damping characteristic is stabilized. Therefore, a desired damping characteristic can be obtained even if the volume filling rate of the hard filler is lowered.

  In addition, since this laminated support does not use materials such as lead that require high costs, it can be discarded at low cost.

  In particular, since the shear yield stress τy of the plastic fluidized material is 0.1 MPa or more, a large damping performance can be obtained.

  Further, since the shear yield stress τy is set to 10 MPa or less, the plastic fluidized material can be largely plastically deformed, and the filling (mixing) of the hard filler is facilitated.

  Furthermore, since the volume filling rate of the hard filler is 25% or more, it is possible to secure a wide contact area between the plastic fluid material and the hard filler and increase the resistance force at the time of flow. Can be obtained.

  Further, by setting the volume filling rate to 74% or less, the contact between the hard fillers is reduced and the movement of the hard fillers is facilitated, so that stable damping performance can be exhibited.

  The invention according to claim 9 is characterized in that, in the invention according to claim 8, the size of the granular material is 0.001 mm ≦ Lave ≦ 1.0 mm in terms of the average value Lave of the representative length L. And

  By setting the size of the granular material to 0.001 mm ≦ Lave ≦ 1.0 mm in terms of the average value Lave of the representative length L, high attenuation performance can be obtained.

  Since the present invention has the above-described configuration, it can be discarded at a low cost and can exhibit a large damping force.

  FIG. 1 shows a laminated support 12 according to a first embodiment of the present invention. The laminated support 12 is a laminated elastic material in which a plurality of disk-shaped metal plates 18 and a plurality of disk-shaped rubber plates 20 are alternately laminated in the thickness direction (hereinafter, this lamination direction is referred to as “X direction”). A body 16 is provided.

  Flange plates 14 are fixed to both end surfaces of the laminated elastic body 16 in the X direction. The flange plate 14 includes a flange portion 14F that protrudes to the side of the laminated elastic body 16, and a bolt is inserted into a bolt hole (not shown) formed in the flange portion 14F so that the laminated support body 12 is supported. It is attached to members (for example, building foundations, foundations, grounds, etc.) and supported members (for example, office buildings, hospitals, apartment houses, museums, public halls, schools, government buildings, shrines and temples, bridges, etc.). In the attached state, the supported member is supported by the support member via the laminated support 12.

  The metal plate 18 and the rubber plate 20 constituting the laminated elastic body 16 are firmly bonded to each other by vulcanization adhesion (or by an adhesive), so that they are not inadvertently separated or misaligned. Yes. When the laminated support body 12 receives a horizontal shearing force, the laminated elastic body 16 is also elastically sheared.

  Accordingly, when the supporting member and the supported member are relatively moved (vibrated) in the horizontal direction, the laminated elastic body 16 is elastically sheared and deformed as a whole. Here, as described above, by alternately laminating the metal plates 18 and the rubber plates 20, even when a load acts in the laminating direction, the elastic deformation of the laminated elastic body 16 (that is, compression of the rubber plates 20) occurs. It is suppressed.

  The laminated elastic body 16 further includes a covering material 22 that covers the outer end faces of the metal plate 18 and the rubber plate 20 from the periphery. The coating material 22 prevents rain and light from acting on the metal plate 18 and the rubber plate 20 from the outside, thereby preventing deterioration due to oxygen, ozone, ultraviolet rays, or the like. Further, the covering material 22 has a constant thickness so that there is no variation in its strength. The covering material 22 can be formed of the same material as the rubber plate 20. In this case, the rubber plate 20 and the covering material 22 can be formed separately and integrated by vulcanization adhesion or the like in a subsequent process. Alternatively, the covering material 22 and the rubber plate 20 may be bonded with an adhesive or the like.

  An elastic hollow portion 28 that penetrates the laminated elastic body 16 in the X direction is formed at the center of the laminated elastic body 16. The elastic hollow portion 28 is a cylindrical space in the present embodiment, but the shape is not limited to a cylindrical shape.

  A plastic fluid 30 made of an elastic-plastic material is injected into the elastic hollow portion 28. As shown schematically in FIG. 5 (A), this elastic-plastic body exhibits an elastic behavior in which shear stress and shear strain are proportional to a certain yield point. Refers to a material that exhibits plastic behavior such that is constant.

  In addition, the graph shown to this FIG. 5 (A) modeled the behavior of the plastic fluid material 30 to the last. Therefore, the shear stress is exactly proportional to the shear strain up to the yield point, and after the yield point, the shear stress is completely constant. In other words, when the yield point is exceeded, the plastic fluidized material is not cured (non-hardened). A material exhibiting such a behavior is particularly called an elastic perfect plastic body, and has the most preferable characteristics as the plastic fluidized material 30 of the present invention. However, the present invention can be applied to the present invention even if the material does not actually exhibit such behavior. In short, it is only necessary to show a behavior in which the shear strain increases when the yield point is reached, because the shear stress slightly increases (or does not increase at all). Considering the graph of FIG. 5 (A), the slope of the straight line (or curve) may be relatively steep until the yield point is reached, and the slope may be gentle when the yield point is exceeded. For example, even if the shear stress increases monotonically with respect to the shear strain in the state beyond the yield point, the degree of the increase, that is, the slope of the straight line (or curve) on the right side of the yield point is greater than the left side of the yield point. If it is small, the plastic fluid material 30 exhibits an elastic behavior until the yield point is reached, and if it exceeds the yield point, the plastic fluid material 30 exhibits a plastic behavior, so that it can be applied as the plastic fluid material 30 of the present invention. Become.

  In an actual material, for example, as shown in FIG. 5B, the shear stress may change from increasing to decreasing, and in this case, the shear stress at the maximum value is said to be the upper yield point. Furthermore, as shown in FIG. 5C, the shear stress may change from decreasing to increasing in a state exceeding the upper yield point, and in this case, the shear stress at the minimum value is referred to as a lower yield point. Thus, a material having an upper yield point or a lower yield point may be used. In the material as shown in FIG. 5B or 5C, the upper yield point is the shear yield stress τy.

  Examples of the plastic fluid material 30 include, but are not limited to, unvulcanized rubber and thermoplastic elastomer. Examples of the main component (polymer) of the unvulcanized rubber include natural rubber (NR), styrene / butadiene rubber (SBR), styrene / propylene rubber (EPM, EPDM), and silicone rubber (Q). Further, a compounding agent such as carbon black, calcium carbonate, oil or resin may be blended with unvulcanized rubber or thermoplastic elastomer. In particular, unvulcanized rubber is preferable because it is easily available and can be constructed at low cost.

  Further, in the elastic body hollow portion 28, that is, in the plastic fluid material 30, a spherical spherical body 32 made of a hard material that can be regarded as a rigid body with respect to the plastic fluid material 30 has a predetermined volume filling rate. A plurality are filled. The “volume filling rate” is a percentage of the volume of the spherical body 32 to the sum of the volume of the plastic fluid 30 and the volume of the spherical body 32.

  The spherical body 30 is an example of the hard filler of the present invention, but the material of the hard filler may be a material having a hardness that can be regarded as a rigid body with respect to the plastic fluid material 30. For example, metals, ceramics, engineering plastics, and the like can be applied, but are not limited thereto. Specific examples of the metal include pure iron, and powder mainly composed of iron such as carbon steel and stainless steel. In particular, iron is preferable because it is relatively high compared to other metals, and thus temperature rise is suppressed and initial characteristics can be maintained.

  A closing plate 24 is disposed at the end of the elastic hollow portion 28. The closing plate 24 is formed in a disk shape having a larger diameter than the elastic body hollow portion 28 so that the end of the elastic body hollow portion 28 in the X direction can be closed. By fixing the closing plate 24 to the flange plate 14, the elastic body hollow portion 28 can be sealed.

  In the laminated support body 12 of the first embodiment having such a configuration, the laminated elastic body 16 is shown in FIG. 2A by relative movement (vibration) between the support member and the supported member in the horizontal direction. Is elastically sheared. At this time, as shown also in FIG. 2B, the plastic fluid 30 in the elastic body hollow portion 28 also undergoes shear deformation as a whole and absorbs energy. In this embodiment, since the spherical body 32 is filled in the plastic fluid material 30, the plastic fluid material 30 contacts not only the inner surface of the elastic hollow portion 28 but also the surface of the spherical body 32, and the contact area thereof. The plastic fluidized material 30 is difficult to flow due to the interposition of the spherical body 32. For this reason, the damping characteristic at the time of shear deformation of the laminated elastic body 16 is improved, and a larger damping force can be exhibited to absorb energy.

  In FIG. 3A, the laminated elastic body of the comparative example having the same configuration, except that the spherical body 32 (hard filler) as in the present embodiment is not filled, enlarges only the portion of the plastic fluid material 30. It is shown as In the laminated elastic body of the comparative example, the plastic fluid 30 is in contact only with the inner surface of the elastic body hollow portion 28. Therefore, assuming a rectangular parallelepiped region E1 in the cross section before deformation as shown in FIG. 3A, for example, this region E1 is simply sheared as shown in FIG. There is. On the other hand, in the present embodiment, the spherical body 32 (hard filler) moves and the plastic fluid 30 also moves (flows) in the narrow gap between the spherical bodies 32 (hard filler), so that a large damping force is generated. can get.

  In particular, in this embodiment, since the plastic fluid material 30 is composed of an elastic perfect plastic material (non-hardened elastic plastic material), the dispersion state of the filled spherical bodies 32 (hard filler) is stabilized. That is, the spherical bodies 32 are uniformly distributed in the plastic fluidized material 30 without inadvertent precipitation or uneven distribution. For this reason, the damping characteristic of the plastic fluidized material 30 does not change partially, and stable damping performance can be exhibited.

  Moreover, in this embodiment, in order to obtain a desired damping force in this way, a lead member such as a conventional lead plug is not required. For this reason, it becomes possible to dispose at low cost.

  In the present embodiment, the spherical body 32 formed in a spherical shape is given as an example of the hard filler of the present invention. In short, the plastic fluid material 30 is brought into contact with the plastic fluid material 30 by being filled in the plastic fluid material 30. Thus, there is no particular limitation as long as the contact area can be increased and the flow resistance of the plastic fluid 30 can be increased. For example, the spheroidal hard filler 36 shown in FIG. 4 (A), the cylindrical hard filler 38 shown in FIG. 4 (B), the disk-like hard filler 39 shown in FIG. Examples thereof include a hard filler 41 having a constricted shape (so-called “peanut shell” shape) in the longitudinal center of the spheroid shown in FIG.

  If the hard filler is spherical as in the present embodiment, the directionality is lost, and stable damping characteristics can be exhibited in any direction. In this case, the “spherical shape” includes a complete spherical shape, but may not be a complete spherical shape as long as it has substantially no direction dependency. For example, a regular polyhedron shape, a hard filler 48 having a surface composed of a pentagon and a hexagon (so-called “soccer ball” shape) as shown in FIG. 4E, or FIG. As shown in the figure, from the surface of the sphere, a plurality of conical (which may be pyramidal, frustum-shaped, or frustum-shaped) microprotrusions are formed so that each apex faces outward ( It may be a so-called “gold flat sugar” shape hard filler 49 or the like. In the case of the regular polyhedron-shaped hard filler 48, the larger the number of surfaces, the closer to a spherical shape, and the directionality is eliminated, which is preferable. In the case of the hard filler 49 in the shape of confetti, it is preferable to make the size of the minute projections substantially uniform and to reduce the deviation of the position distribution, because the directionality by the projections is reduced.

  In addition, it is preferable to use a hard filler as a granular material because filling into the plastic fluid 30 is facilitated and the damping performance is stabilized. For example, since the spheroid shape, columnar shape, disc shape, peanut shape, soccer ball shape, and konpei sugar shape are all independent of the behavior of the hard filler in the plastic fluid 30, Can be considered. Furthermore, as shown in FIG. 8, even if the hard filler 51 has an indefinite shape (the shape is not constant), each of the hard fillers 51 is included in the granular body as long as it is independently granular.

  When the hard filler is granular, it is preferable that the size is 0.001 mm or more and 1.0 mm or less in terms of the average value Lave of the representative length L because high damping performance can be obtained. Furthermore, it is more preferable that the size of the granular material is 0.003 mm or more and 0.3 mm or less as the average value Lave of the representative length L, because higher attenuation performance can be obtained.

  As shown in FIG. 8, the representative length L of the granular material is a maximum distance (in a certain direction) with respect to an observation surface (projection surface) obtained using a magnifying glass (such as a microscope or a microscope). Feret diameter). A value obtained by measuring the representative length L of a plurality of granular bodies and taking an average value is an average value Lave here. In the example shown in FIG. 8, the irregular length of the hard filler 51 is taken and the representative length L is measured. However, the shape of the hard filler is not limited to this, and for example, FIG. In any of the hard fillers shown in (F), the representative length L can be measured in the same manner.

  FIG. 6A is a graph showing the relationship between the size of the hard filler (the average value Lave of the representative length L) and the damping performance. FIG. 6B shows a graph of the relationship between the volume filling rate φ of the hard filler and the damping performance. These graphs show shear deformation at a specified displacement by applying a force in the horizontal direction to the laminated support 12 shown in FIG. 1 (A) while applying a constant load in the vertical direction using a dynamic tester. It was obtained based on the result of the test conducted by producing.

The structure of the laminated support 12 used for the test conditions is as follows.
-Outer diameter of laminated elastic body 16: 225 mm
-Thickness per rubber plate 20 of the laminated elastic body 16: 1.8 mm
-Thickness per metal plate 18 of the laminated elastic body 16: 0.8 mm
-Number of layers of the rubber plate 20 of the laminated elastic body 16: 25-Outer diameter of the plastic fluidized material 30 filled with the hard filler: 45 mm
-Volume filling rate of hard filler: 0% to 75%
-Shape and material of hard filler: Indeterminate or nearly spherical iron powder-Size of hard filler (Lave): 0.0001 mm to 2.0 mm
-Material of rubber plate 20: Natural rubber-Shear elastic modulus of rubber plate 20: 0.39 N / mm ²
-Composition of plastic fluid 30: unvulcanized rubber
Formulation (wt%): natural rubber 13%, butadiene rubber 31%,
36% carbon, 18% resin,
Other oil 2%

The test conditions are as follows.
・ Shear displacement amplitude: 22.5 mm to 112.5 mm (shear strain: 50% to 250%)
・ Test frequency: 0.33 Hz
・ Compressive stress: 10 MPa

  In addition, although the representative length L of the hard filler has a different value for each of the hard fillers, in the above test, as shown in FIG. 9, the frequency distribution is a single mountain (the maximum value of the frequency is only at one location). Particle group of existing distribution).

FIG. 7 shows the relationship between the horizontal displacement (δ) and the horizontal load (Q) of the laminated support 12 in the test performed in this manner. The actual laminated support 12 can absorb more vibration energy as the area of the region surrounded by the hysteresis curve increases. In view of simplicity and the like, the intercept load Qd is often used as an index for realistically evaluating the attenuation performance. This intercept load Qd is a horizontal load value at a displacement of 0, and using the loads Qd1 and Qd2 at the point where the hysteresis curve intersects the vertical axis,
Qd = (Qd1 + Qd2) / 2
Is calculated. As this value increases, the area of the region surrounded by the hysteresis curve also increases. The vertical axis of the graphs of FIGS. 6A and 6B represents the intercept load Qd thus obtained. Further, the horizontal axis of the graph of FIG. 6A indicates the size (Lave) of the hard filler on a logarithmic scale. FIG. 6A shows the result when the volume filling rate of the hard filler is 65%. FIG. 6B shows the result when the size (Lave) of the hard filler is 0.05 mm.

  From FIG. 6 (A), when the size (Lave) of the hard filler is about 0.05 mm, the attenuation performance is the highest, and even when the size (Lave) is larger or smaller than this, the attenuation is reduced. It can be seen that the performance is gradually decreasing.

  Here, usually, the attenuation characteristic of the laminated support as in the present invention is often expressed using an equivalent attenuation constant heq. Therefore, first, in FIG. 7, the hysteresis characteristics are approximated by a bilinear model. That is, this hysteresis characteristic curve is approximated using four straight lines indicated by broken lines (inclinations are Kd1, Kd2, Ku1, Ku2 respectively), and Kd1 = Kd2 = Kd, Qd1 = Qd2 = Qd, Ku1 = Ku2 = Ku

の関係が成り立つ。

The relationship holds.

  And generally, in the laminated support body used for a seismic isolation use, it is preferable to set it as hep> = 0.10, and it is more preferable to set it as hep> = 0.15.

  In the laminated support 12 of this embodiment, when Kd = 332 kN / m, Ku = 10 Kd and the deformation amount is 0.0675 m when the shear strain is 150%, hep ≧ 0. 10 corresponds to Qd ≧ 0.4 × 9.8 kN, and hep ≧ 0.15 corresponds to Qd ≧ 0.8 × 9.8 kN. From the above viewpoints, it can be seen that when the intercept load Qd is set to 0.4 × 9.8 kN or more, for example, this condition is satisfied when the size (Lave) is 0.001 mm or more and 1.0 mm or less. In order to obtain higher attenuation performance, for example, when the intercept load Qd is set to 0.8 × 9.8 kN or more, it is understood that this condition is satisfied when the size (Lave) is 0.003 mm or more and 0.3 mm or less. .

  In addition, from FIG. 6B, as the volume filling rate φ of the hard filler increases, the damping performance generally increases, but the damping performance is highest when the volume filling rate ranges from 65% to 70%. If it exceeds 70%, a slight decreasing trend is observed. And compared with the case where the volume filling rate is 0%, when it is 25% or more, the effect of filling with the hard filler is confirmed, and when it is 50% or more, the damping effect is about twice. This is considered to be because when the volume filling rate of the hard filler increases, a wide contact area between the plastic fluidized material 30 and the hard filler can be secured. However, if the volume filling rate of the hard filler exceeds 74%, the contact portion between the hard fillers increases, and it becomes difficult to obtain a stable damping performance. In other words, by setting the volume filling rate of the hard filler to 74% or less, the number of contact portions between the hard fillers is reduced, and the movement of the hard filler is facilitated, thereby exhibiting stable damping performance. It becomes possible.

  In addition, although the said test was done by the case where the thing close | similar to a spherical shape was used as a hard filler, and the case where an amorphous thing was used, the significant difference did not arise in the intercept load Qd.

  In short, the plastic fluidized material of the present invention can stabilize the dispersion state of the hard filler as long as it is composed of an elastic perfect plastic material (non-hardened elastic plastic material). In particular, the shear yield stress τy of the plastic fluidized material is preferably 0.1 MPa or more and 10 MPa or less. That is, by setting the pressure to 0.1 MPa or more, sufficient attenuation performance can be obtained. By setting the pressure to 10 MPa or less, the plastic fluidized material can be greatly plastically deformed.

It is sectional drawing which shows the laminated support body of one Embodiment of this invention before a deformation | transformation, (A) is a whole block diagram, (B) is a partial enlarged view. It is sectional drawing which shows the laminated support body of one Embodiment of this invention after deformation | transformation, (A) is a whole block diagram, (B) is a partial enlarged view. It is the elements on larger scale of the laminated support body of a comparative example, (A) is before a deformation | transformation, (B) is after a deformation | transformation. (A)-(F) are all perspective views which show the example of the hard filler applicable to the lamination | stacking support body of this invention. (A) to (C) are all graphs showing the stress-strain characteristics of an elastic-plastic body. (A) is a graph which shows the relationship between the magnitude | size of a hard filler, and damping performance, (B) is a graph which shows the relationship between the volume filling factor of hard filler, and damping performance. It is a graph which shows the relationship between a horizontal deformation displacement and a horizontal load (Q) in the lamination | stacking support body which uses a hard filler. It is a front view which shows the example different from what was shown in FIG. 4 of the hard filler applicable to the laminated support body of this invention. It is a graph which shows the relationship between the typical length of the hard filler applied to this invention, and frequency distribution.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 Laminated support body 14 Flange board 14F Flange part 16 Laminated elastic body 18 Metal plate 20 Rubber board 22 Cover material 24 Closure board 28 Elastic body hollow part 30 Plastic fluid material 32 Spherical body 36 Hard filler 38 Hard filler 39 Hard filler 42 Hard filler 41 Hard filler 48 Hard filler 49 Hard filler 51 Hard filler

Claims (9)

A laminated elastic body in which a rigid plate having rigidity and an elastic plate having elasticity are alternately laminated in a predetermined lamination direction, and a hollow portion is formed in the lamination direction;
A plastic fluidized material composed of an elastoplastic material and injected into the hollow portion;
A hard filler filled in the plastic fluidized material;
A laminated support characterized by comprising:   The laminated support according to claim 1, wherein the plastic flow material has a shear yield stress τy of 0.1 MPa ≦ τy ≦ 10 MPa.   The laminated support according to claim 1 or 2, wherein a volume filling rate of the hard filler is 25% to 74%.   4. The laminated support according to claim 3, wherein the volume filling rate of the hard filler is further 50% to 74%.   The laminated support according to any one of claims 1 to 4, wherein the hard filler is a granular body formed in a granular form.   6. The laminated support according to claim 5, wherein the size of the granular material is 0.001 mm ≦ Lave ≦ 1.0 mm in terms of an average value Lave of the representative length L.   The laminated support according to claim 6, wherein the size of the granular material is 0.003 mm ≦ Lave ≦ 0.3 mm in terms of an average value of the representative length L. A laminated elastic body in which a rigid plate having rigidity and an elastic plate having elasticity are alternately laminated in a predetermined lamination direction, and a hollow portion is formed in the lamination direction;
A plastic fluidized material composed of a non-curing type elastic perfect plastic material and injected into the hollow portion;
A hard filler filled in the plastic fluidized material;
Have
The shear yield stress τy of the plastic fluid material is 0.1 MPa ≦ τy ≦ 10 MPa,
A volumetric filling factor of the hard filler is 25% to 74%.   9. The laminated support according to claim 8, wherein the size of the granular material is 0.001 mm ≦ Lave ≦ 1.0 mm in terms of an average value Lave of the representative length L.

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