Vibration absorption structure

Abstract

To provide a vibration absorption structure which can suppress aging degradation and keep vibration absorption performance and sound insulation performance for a long time.SOLUTION: A vibration absorption structure (1) includes an elastic pad (2) formed from an elastic material, and a plurality of spring members (4) disposed in contact with the elastic pad (2) and receiving a load in a thickness direction (Y) of the elastic pad (2).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vibration absorbing structure, and more particularly to a vibration absorbing structure suitable for being disposed between a slab and a beam of a structure to absorb vibrations. [Background technology]

[0002] In buildings, a structure for absorbing vibrations is often placed between a slab (floor slab) made of concrete or the like and a beam made of H-steel or the like. For example, the vibration-absorbing structure described in Patent Document 1 includes a plurality of support columns erected on the upper surface of the lower floor slab and a height adjustment mechanism consisting of screw jacks attached to the upper ends of the support columns. A spacer is placed at the upper end of the height adjustment mechanism, and a cushioning material made of a rubber sheet is placed between the spacer and the upper floor slab. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-090103 Summary of the Invention [Problem to be solved by the invention]

[0004] The aforementioned rubber sheets efficiently absorb vibration energy when sandwiched between structural members. Furthermore, when used in, for example, the floor structure of a house, such rubber sheets exhibit sound-insulating properties. However, rubber sheets incorporated into a structure are constantly subjected to static loads from the aforementioned slabs and other components, resulting in a highly compressed state. Such highly compressed rubber sheets are unable to fully demonstrate their inherent vibration-damping, vibration-isolation, and sound-insulating properties when subjected to dynamic loads such as impacts and vibrations. Furthermore, rubber sheets deteriorate when compressed over a long period of time, resulting in so-called settling, which significantly impairs their inherent vibration-damping, vibration-isolation, and sound-insulating properties.

[0005] The present invention has been made in consideration of such problems, and aims to provide a vibration absorbing structure that can suppress deterioration over time and maintain vibration absorbing performance and sound insulating performance over a long period of time. [Means for solving the problem]

[0006] In order to achieve the above object, the vibration absorbing structure of the present invention comprises an elastic pad formed from an elastic material, and a plurality of spring members arranged in contact with the elastic pad and receiving a load in the thickness direction of the elastic pad. [Effects of the Invention]

[0007] According to the vibration absorbing structure of the present invention, deterioration over time can be suppressed, and vibration absorbing performance and sound insulating performance can be maintained for a long period of time. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of a vibration absorbing structure according to an embodiment of the present invention; [Figure 2] 1 is a perspective view of a vibration absorbing structure, the entire structure being transparent and partly in cross section; [Figure 3] FIG. [Figure 4] FIG. 1 is a plan view of a floor structure in which a vibration absorbing structure is arranged. [Figure 5] FIG. 5 is a partial cross-sectional view of FIG. [Figure 6] FIG. 2 is a side view of a vibration absorbing structure having a stopper portion. DETAILED DESCRIPTION OF THE INVENTION

[0009] A vibration absorbing structure according to an embodiment of the present invention will now be described with reference to the drawings. Fig. 1 shows a perspective view of a vibration absorbing structure 1 according to an embodiment of the present invention, and Fig. 2 shows a perspective view of the vibration absorbing structure 1, with the entire structure seen through and a portion in cross section. The vibration absorbing structure 1 (hereinafter also simply referred to as structure 1) comprises a plate-shaped elastic pad 2 made of an elastic material, and a plurality of spring members 4 (see Fig. 2) arranged in contact with the elastic pad 2. In each drawing, the lateral direction in the longitudinal direction of the elastic pad 2 is defined as X, the thickness direction of the elastic pad 2 as Y, and the lateral direction in the lateral direction of the elastic pad 2 as Z.

[0010] The elastic material constituting the elastic pad 2 is, for example, a high-damping rubber made from natural rubber or a resin-based material, which efficiently converts vibration energy into thermal energy and absorbs it. The spring member 4 is, for example, a coil spring made of a wound wire spring material made of metal, and receives a load in the thickness direction Y of the elastic pad 2. More specifically, as shown in Fig. 1, the spring member 4 is embedded in the elastic pad 2, and as shown in Fig. 2, the spring member 4 is a coil spring made of a wound wire spring material in an inverted cone shape.

[0011] FIG. 3 shows a side view of the structure 1. Note that FIG. 3 shows a portion of the structure 1 in cross section. The elastic pad 2 has a main body 6, an upper protrusion 8, and a lower protrusion 10. The main body 6 is formed in a plate shape having an upper surface 2a and a lower surface 2b. The upper protrusion 8 is formed to protrude upward from the upper surface 2a in an annular shape, and the upper end 4a of the spring member 4 is positioned thereon. The lower protrusion 10 is formed to protrude downward from the lower surface 2b in an annular shape, and the lower end 4b of the spring member 4 is positioned thereon.

[0012] The upper end 4a of the spring member 4 has a larger diameter than the lower end 4b, and therefore the upper protrusion 8 of the elastic pad 2 has a larger diameter than the lower protrusion 10. In addition, in the region extending from the inside of the upper protrusion 8 of the elastic pad 2 to the inside of the lower protrusion 10, an inverted cone-shaped tapered circumferential surface portion 12 is formed along the inverted cone-shaped spring member 4, and a through hole 14 connected to the tapered circumferential surface portion 12 is formed on the inside of the lower protrusion 10. The tapered circumferential surface portion 12 and the through hole 14 are portions formed as a result of forming the main body 6 along the shape of the spring member 4, and this reduces the thickness of the elastic pad 2, thereby reducing material costs and weight.

[0013] Fig. 4 shows a plan view of a floor structure 16 in which a structural member 1 is arranged, and Fig. 5 shows a partial cross-sectional view of Fig. 4. As shown in Fig. 5, the floor structure 16 is constructed, for example, by placing an H-steel 22 on a foundation member 18 via a protective member 20, and then placing a slab 24 and a floor member 26 on the H-steel 22 via the structural member 1. As shown in Fig. 4, by placing the structural member 1 in an appropriate position in the floor structure 16, it is possible to exhibit the vibration damping and isolation performance and sound insulation performance of the floor structure 16.

[0014] FIG. 6 shows a side view of the structure 1 having a stopper portion 28. The structure 1 may have a stopper portion 28 as shown in FIG. 6 on the elastic pad 2, and it is preferable that a plurality of stopper portions 28 are formed on the upper surface 2a and the lower surface 2b around the upper protrusion 8 and the lower protrusion 10. More specifically, the stopper portion 28 on the upper surface 2a is formed to protrude upward from the upper surface 2a at a height H2 that is lower than the height H1 of the upper protrusion 8 from the upper surface 2a. Furthermore, the stopper portion 28 on the lower surface 2b is formed to protrude downward from the lower surface 2b at a height H4 that is lower than the height H3 of the lower protrusion 10 from the lower surface 2b.

[0015] As described above, the structure 1 of this embodiment includes the elastic pad 2 formed from an elastic material and a plurality of spring members 4 arranged in contact with the elastic pad 2, and each spring member 4 receives a load in the thickness direction Y of the elastic pad 2. By configuring the spring members 4 to assist the elastic pad 2 in this way, it is possible to suppress deterioration over time of the elastic pad 2, and therefore the structure 1, and to maintain the vibration absorption performance and sound insulation performance of the elastic pad 2, and therefore the structure 1, over a long period of time.

[0016] Specifically, even if the structure 1 is constantly subjected to static loads from the slab 24 or the like, most of this static load is received by each spring member 4, so the elastic pad 2 is not constantly in a highly compressed state. Therefore, when the structure 1 is subjected to dynamic loads such as impacts and vibrations, the elastic pad 2 can fully demonstrate its inherent vibration-damping, vibration-isolating and sound-insulating performance. In addition, since it is possible to suppress settling of the elastic pad 2 due to long-term compression, it is possible to maintain the original characteristics of the elastic pad 2 for demonstrating vibration-damping, vibration-isolating and sound-insulating performance.

[0017] Furthermore, by embedding the spring member 4 in the elastic pad 2, the entire spring member 4 can be brought into contact with, and thus into tight contact with, the elastic pad 2. This further enhances the assist effect of the spring member 4 on the elastic pad 2. Therefore, deterioration over time of the elastic pad 2, and therefore of the structure 1, can be more effectively suppressed, and these characteristics can be maintained for an even longer period of time.

[0018] Furthermore, the spring member 4 is a coil spring formed by winding a linear spring material, and the elastic pad 2 has a main body 6, an upper protrusion 8, and a lower protrusion 10. The main body 6 has an upper surface 2a and a lower surface 2b, and the upper protrusion 8 is formed to protrude from the upper surface 2a, and the upper end portion 4a of the spring member 4 is positioned thereon. The lower protrusion 10 is formed to protrude from the lower surface 2b, and the lower end portion 4b of the spring member 4 is positioned thereon. This allows the upper end portion 4a of the spring member 4, which is positioned at the upper protrusion 8, to reliably bear static loads from the slab 24, etc.

[0019] Furthermore, the static load received can be released to the base material 18 at the lower end 4b of the spring member 4 positioned at the lower protrusion 10. Therefore, compression of the elastic pad 2 when not receiving a dynamic load can be suppressed, which makes it possible to more effectively suppress deterioration over time of the elastic pad 2 and, in turn, the structure 1, and to maintain these characteristics for an even longer period of time.

[0020] Furthermore, the spring member 4 is a coil spring formed by winding a spring material in an inverted cone shape, and the upper protruding portion 8 has a larger diameter than the lower protruding portion 10. This ensures a large bearing area for the static load received by the upper protruding portion 8 of the spring member 4, so that the static load can be received more reliably and with as little surface pressure as possible. As a result, the elastic force of each spring member 4 acting against the static load can be reduced, further enhancing the assist effect of the spring member 4 on the elastic pad 2 when a dynamic load is received. Therefore, deterioration over time of the elastic pad 2, and therefore of the structure 1, can be more effectively suppressed, and these characteristics can be maintained for an even longer period of time.

[0021] Furthermore, the stopper portions 28 of the elastic pad 2 protrude from the upper surface 2a of the elastic pad 2 at a height H2 that is lower than the upper protrusions 8, and protrude from the lower surface 2b of the elastic pad 2 at a height H4 that is lower than the lower protrusions 10. This allows the stopper portions 28 to suppress compression of the main body portion 6 of the elastic pad 2, even when the static load received by the upper protrusions 8 of the spring members 4 is large and the degree of contraction of each spring member 4 is large. Therefore, since compression of the elastic pad 2 can be suppressed when not receiving a dynamic load, deterioration over time of the elastic pad 2, and therefore of the structure 1, can be more effectively suppressed, and these properties can be maintained for an even longer period of time.

[0022] This concludes the description of one embodiment of the present invention, but the present invention is not limited to the above embodiment and various modifications can be made without departing from the spirit of the present invention. For example, the spring member 4 may be placed in contact with the elastic pad 2, and may be placed on the upper surface 2a of the elastic pad 2 without being embedded in the elastic pad 2. Even in this case, the spring member 4 can receive a load in the thickness direction Y of the elastic pad 2, so the spring member 4 can be configured to assist the elastic pad 2.

[0023] Furthermore, the spring member 4 is not limited to a coil spring wound in an inverted cone shape, but may be a spring of various forms, such as a cylindrically wound coil spring or a leaf spring. The elastic pad 2 is also not limited to the above-described shape. Even in these cases, the spring member 4 can bear a load in the thickness direction Y of the elastic pad 2. The stopper portion 28 may be formed on only one of the upper surface 2a and the lower surface 2b. Even in this case, the stopper portion 28 can suppress compression of the main body portion 6 of the elastic pad 2.

[0024] Furthermore, the structure 1 of this embodiment is not limited to the floor structure 16 described above, but can be incorporated into various structures that can receive both static and dynamic loads. [Explanation of symbols]

[0025] 1. Vibration absorption structure 2 elastic pads 2a Top side 2b Bottom side 4 Spring material (coil spring) 4a Upper end 4b Bottom end 6 Main body 8 Upper protrusion 10 Lower protrusion 28 Stopper part Y thickness direction H2 Height of the stopper on the upper protrusion side H4 Height of the stopper on the lower protrusion side

Claims

1. an elastic pad formed from an elastic material; a plurality of spring members arranged in contact with the elastic pad and receiving a load in a thickness direction of the elastic pad; A vibration absorbing structure comprising:

2. The vibration absorbing structure according to claim 1 , wherein the spring member is embedded in the elastic pad.

3. the spring member is a coil spring formed by winding a linear spring material, The elastic pad is a body portion having an upper surface and a lower surface; an upper protrusion formed to protrude from the upper surface, on which an upper end of the spring member is positioned; a lower protrusion formed to protrude from the lower surface, on which a lower end of the spring member is positioned; The vibration absorbing structure according to claim 1 or 2, comprising:

4. the spring member is a coil spring formed by winding the spring material in an inverted cone shape, The vibration-absorbing structure according to claim 3 , wherein the upper protrusion has a larger diameter than the lower protrusion.

5. 4. The vibration absorbing structure according to claim 3, wherein the elastic pad has a stopper portion that protrudes from the upper surface and / or the lower surface at a height lower than that of the upper protrusion and / or the lower protrusion.

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