Vibration isolation member, vibration isolation structure and vibration isolation method

Abstract

To provide a vibration isolation member which can reduce vibration without amplifying it, and can transmit the vibration even in a common frequency band, and can exert a favorable vibration isolation effect in a state that a mass body is placed on the vibration isolation member.SOLUTION: A vibration isolation member 1 has a three-dimensional frame part 3 having a penetration hole 2, and a vibration part 4 located in the penetration hole 2. The vibration part 4 has a mass part 5 and a connection piece part 6. The connection piece part 6 is connected to an internal periphery of the penetration hole 2 at one end part 6a, and connected to the mass part 5 at the other end part 6b. A space in the penetration hole 2 other than a portion in which the vibration part 4 is located is released. A spring mass resonator is constituted of the mass part 5 and the connection piece part 6. The frame part 3, the mass part 5 and the connection piece part 6 are integrally formed. One face 3a out of an outer surface of the frame part 3 is a loaded face for receiving at least a load L in a direction V orthogonal to the face 3a. The vibration part 4 vibrates in at least the same direction as the load L.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vibration-isolating member, a vibration-isolating structure, and a vibration-isolating method. [Background technology]

[0002] Anti-vibration members are used in various vehicles and equipment to block the transmission of vibrations. The vibration-damping structure of Patent Document 1 includes a skeleton part forming an internal space partitioned by columns and walls, a columnar conductive part having one end connected to the skeleton part and extending into the internal space, a spherical excitation part located in the internal space, connected to the conductive part and extending relative to the conductive part, and a flow material in contact with at least the excitation part. The skeleton part, conductive part, and excitation part of this vibration-damping structure are integrated.

[0003] The vibration reduction device of Patent Document 2 includes a cross-shaped frame that is attached to the vehicle body and divides a certain space into certain areas, and vibrators that are configured at the corners of each area divided by the frame and have their own natural frequencies to block vibrations transmitted from the vehicle body through the frame.

[0004] The anti-vibration rubber of Patent Document 3 has a specific composition, which increases the hysteresis loss (tan δ) and reduces the transmissibility of resonant vibrations (shakes) that occur particularly at low frequencies.

[0005] The vibration-proof structure of Patent Document 4 has a dynamic vibration absorber attached to a vibration system, which suppresses an increase in vibration transmissibility in the resonance frequency band. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6911592 [Patent Document 2] JP 2020-91481 A [Patent Document 3] Patent No. 7009106 [Patent Document 4] Japanese Patent Application Publication No. 11-101301 Summary of the Invention [Problem to be solved by the invention]

[0007] In the vibration-damping structure of Patent Document 1, the internal space of the skeleton is filled with a fluid material, and the vibration of the skeleton is absorbed and attenuated by the fluid material in contact with the skeleton. However, Patent Document 1 does not describe specific physical properties or materials of the vibration-damping structure. This vibration-damping structure is attached to an object (a vibration source or a member connected to a vibration source) and has a vibration-damping effect of suppressing the vibration of the object itself, but is not intended to have a vibration-proof effect of suppressing the transmission of vibration. When a load is applied to the vibration-damping structure, it is highly likely that the desired vibration characteristics will not be obtained and a good vibration-damping effect will not be obtained. The vibration-damping structure of Patent Document 1 reduces vibration by contacting and colliding with the fluid material, whereby the spherical excitation part that vibrates with a large amplitude reduces vibration, and the skeleton does not contribute to vibration reduction. In Patent Document 1, a spherical excitation part is formed and the internal space is filled with a fluid material to hold it so that it does not leak out, so that the manufacture of the vibration-damping structure is very complicated.

[0008] The vibration reduction device of Patent Document 2 has vibrators at the corners of each area partitioned by a frame. The frame does not substantially contribute to vibration reduction, and vibration is blocked only by the vibrators. However, there is no suggestion that the vibration reduction device of Patent Document 2 exerts a vibration-proofing effect. And, when a load is applied to this vibration reduction member, it is highly likely that the desired vibration reduction and vibration control effect will not be obtained. At present, there is a demand for a more reliable and greater vibration reduction effect than that of the vibration reduction device of Patent Document 2.

[0009] The anti-vibration rubber of Patent Document 3 reduces the transmissibility of resonant vibrations that occur at low frequencies, but it is difficult to make the vibration transmissibility less than 1 (less than 0 dB). In other words, even if anti-vibration material is used in the resonant frequency band, vibrations are amplified and transmitted, and the invention described in Patent Document 3 merely reduces the degree of vibration amplification in the resonant frequency band.

[0010] The vibration isolation structure of Patent Document 4 also suppresses an increase in vibration transmissibility in the resonance frequency band, but the vibration transmissibility is 1 or more (0 dB or more). In other words, vibrations are transmitted at a high intensity during resonance, and the invention described in Patent Document 4 merely reduces the degree of vibration amplification during resonance. In addition, since a dynamic vibration absorber made of a material different from that of the vibration system is attached to a device that constitutes the vibration system, the number of parts increases and multiple different materials (for example, vibration isolation rubber, rubber and metal for the dynamic vibration absorber, etc.) must be used, which may lead to complicated manufacturing processes, high costs, and an increase in the size of the entire device.

[0011] Although the configurations described in Patent Documents 1 to 4 can reduce the transmission of vibrations in a specific frequency band, they cannot significantly reduce vibrations outside that frequency band. In particular, they cannot reduce vibrations in a resonant frequency band, which is a frequency band lower than the specific frequency band, and they inevitably amplify and transmit the vibrations.

[0012] Furthermore, when an anti-vibration member is placed on a foundation (such as the ground or a building floor) and some mass body (equipment or structure) is placed on the anti-vibration member, it may be necessary to reduce the transmission of vibration from the foundation to the vibrating body or from the vibrating body to the foundation. However, all of the configurations described in Patent Documents 1 to 4 attempt to achieve the vibration-isolating effect of the anti-vibration member alone, but do not take into consideration whether the anti-vibration effect can be exerted when a mass body is placed on the anti-vibration member.

[0013] Therefore, the object of the present invention is to provide a vibration-damping member and vibration-damping structure that can reduce and transmit vibrations without amplifying them even in the resonant frequency band, can exert an excellent vibration-damping effect when a mass body is placed on it, and has a simple structure and is easy to manufacture, as well as a vibration-damping method using such a vibration-damping member. [Means for solving the problem]

[0014] The vibration-damping member of the present invention has a three-dimensional frame portion having a through hole, and a vibration portion located within the through hole and extending in the same direction as the through hole, the vibration portion having a mass portion and a connecting piece portion, one end of the connecting piece portion being connected to the inner circumference of the through hole and the other end being connected to the mass portion, the space inside the through hole other than the portion where the vibration portion is located is open, the mass portion and the connecting piece portion constituting a spring mass resonator, the frame portion, the mass portion and the connecting piece portion being formed integrally, at least one of the outer surfaces of the frame portion is a load-bearing surface that receives a load in a direction perpendicular to that surface, and the vibration portion vibrates at least in the same direction as the load. The frame portion may be a hollow cube. The vibration direction of the frame portion and the vibration direction of the vibration portion may coincide with each other. The vibration portion may vibrate more strongly than the frame portion. The size and shape of the vibration portion may be set according to the magnitude of the load. The mass may include an opening. The vibration-proof structure of the present invention includes a vibration-proof member of any of the configurations described above, and a mass body placed on the upper surface of the frame portion, and is characterized in that the upper surface of the frame portion is the load-bearing surface that receives a load from the mass body. The underside of the frame portion may be placed on a foundation. A plurality of the vibration-isolating members may be arranged side by side on the foundation, and the mass body may be placed on the plurality of the vibration-isolating members. The vibration-proofing method of the present invention comprises a three-dimensional frame portion having a through hole, and a vibration portion located within the through hole and extending in the same direction as the extension of the through hole, the vibration portion having a mass portion and a connecting piece portion, one end of the connecting piece portion being connected to the inner circumference of the through hole and the other end being connected to the mass portion, the space inside the through hole other than the portion where the vibration portion is located is open, the mass portion and the connecting piece portion constituting a spring mass resonator, and the frame portion, the mass portion and the connecting piece portion being integrally formed are used to apply a load to at least one of the outer surfaces of the frame portion in a direction perpendicular to the surface, and vibrating the vibration portion at least in the same direction as the load to reduce the vibration of the frame portion in that direction. The frame portion may be a hollow cube. The vibration portion may be vibrated more strongly than the frame portion. The mass may include an opening. The size and shape of the vibration portion may be set according to the magnitude of the load. The lower surface of the frame portion may be placed on a foundation, and a mass body may be placed on the upper surface of the frame portion, and the load may be applied from the mass body to the upper surface. A plurality of the vibration-isolating members may be arranged side by side on the foundation, and the mass body may be placed on the plurality of the vibration-isolating members. Effect of the Invention

[0015] According to the present invention, there is provided a vibration-damping member and vibration-damping structure that can reduce and transmit vibrations without amplifying them even in the resonant frequency band, can exert an excellent vibration-damping effect when a mass body is placed on it, and has a simple structure and is easy to manufacture, as well as a vibration-damping method that uses such a vibration-damping member. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1A is a perspective view of a vibration-isolating member according to a first embodiment of the present invention, and FIG. 1B is a schematic front view of a vibration-isolating structure including the vibration-isolating member. [Diagram 2]FIG. 4 is a schematic front view of a vibration-proof structure according to a second embodiment of the present invention. [Diagram 3] 2A is a perspective view of a vibration-isolating member according to a second embodiment of the present invention, and FIG. 2B is a schematic front view of a vibration-isolating structure including the vibration-isolating member. [Figure 4] FIG. 2A is a perspective view of a vibration-isolating member of Comparative Example 1, and FIG. 2B is a schematic front view of a vibration-isolating structure including the vibration-isolating member. [Diagram 5] 1A is a perspective view of a vibration-isolating member of Comparative Example 2, and FIG. 1B is a schematic front view of a vibration-isolating structure including the vibration-isolating member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [First embodiment] FIG. 1(A) is a perspective view showing a vibration-proof member 1 according to a first embodiment of the present invention, and FIG. 1(B) is a front view showing a vibration-proof structure including the vibration-proof member 1. The vibration-proof member 1 according to this embodiment has a three-dimensional frame portion 3 having a through hole 2, and a vibration portion 4 located inside the through hole 2. The frame portion 3 is a hollow cube. The through hole 2 and the vibration portion 4 extend in the same direction (horizontal direction H). The vibration portion 4 located inside the through hole 2 has a mass portion 5 and a connection piece portion 6. The weight of the mass portion 5 is adjusted by providing an opening portion 5a. The connection piece portion 6 extends from the inner circumference of the through hole 2 in the horizontal direction (direction perpendicular to the vertical direction V) at the intermediate portion between the upper surface 3a and the lower surface 3b of the frame portion 3, and is connected to the mass portion 5. One end portion (outer connection end portion) 6a of the connection piece portion 6 is connected to the inner circumference of the through hole 2, and the other end portion (inner connection end portion) 6b is connected to the mass portion 5. An intermediate portion 6c between the one end 6a and the other end 6b extends in the horizontal direction. The space inside the through hole 2, other than the portion where the vibrating portion 4 is located, is an unfilled space that is not filled with anything and is open. The frame portion 3, the mass portion 5, and the connecting piece portion 6 are integrally formed of the same resin material. An example of the material is a resin material having a Young's modulus of 0.1 MPa to 1 GPa, preferably 1 MPa to 500 MPa, and more preferably 5 MPa to 100 MPa. When the Young's modulus of the resin material is within the above-mentioned preferred range, it becomes easier to achieve a vibration reduction effect in the frequency band (0 Hz to several hundred Hz) that is the target of vibration control by vibration isolation. As the resin material, it is desirable to use various vulcanized rubbers such as natural rubber (NR), styrene butadiene rubber (SBR), polybutadiene rubber (PB), nitrile rubber (NBR), ethylene propylene diene rubber (EPDM), chloroprene rubber (CR), urethane rubber (U), silicone rubber (Q), and various thermoplastic elastomers such as olefin-based thermoplastic elastomers, styrene-based thermoplastic elastomers, thermoplastic polyurethane, polyvinyl chloride-based thermoplastic elastomers, and ethylene-vinyl acetate copolymers.The connecting piece 6 functions as a spring, so that the mass part 5 and the connecting piece 6 form a spring-mass resonator.

[0018] As shown in FIG. 1(B), the lower surface 3b of the frame portion 3 of the vibration-isolating member 1 is placed on a foundation 7, and a mass body 8 is placed on the upper surface 3a of the frame portion 3 to form a vibration-isolating structure. The upper surface 3a is a load-bearing surface that receives a load L in a vertical direction V perpendicular to at least the upper surface 3a itself and the horizontal direction H in which the through-hole 2 and the vibrating portion 4 extend, via the mass body 8. There are no limitations on the foundation 7 and the mass body 8. For example, the foundation 7 may be the ground or the floor surface of a building. The mass body 8 may be various types of equipment or structure.

[0019] In the vibration-proof structure of this embodiment, for example, when the mass body 8 vibrates, the vibration-proof member 1 suppresses the transmission of the vibration, and the vibration transmitted to the foundation 7 is reduced. Similarly, when the foundation 7 vibrates, the vibration-proof member 1 suppresses the transmission of the vibration, and the vibration transmitted to the mass body 8 is reduced. In this way, the vibration part 4 is located in the path of the main vibration transmission direction (the direction from the mass body 8 to the foundation 7, or the direction from the foundation 7 to the mass body 8). When the frame part 3 vibrates, the vibration part 4 also vibrates at the same time, and the vibration direction of the frame part 3 and the vibration direction of the vibration part 4 coincide, which is the same as the direction V of the load L. In particular, the mass part 5 vibrates more than the frame part 3 due to the action of the spring mass resonator consisting of the mass part 5 and the connection piece part 6, and the vibration of the frame part 3 is thereby reduced. Since the vibration-proof member 1 is located in the main vibration transmission path and the vibration part 4 vibrates in the same direction as the main vibration, the vibration-proof effect is extremely large. In the connecting piece portion 6 of this embodiment, an intermediate portion 6c between one end portion 6a and the other end portion 6b extends in a direction (lateral direction) substantially perpendicular to the direction of vibration to be reduced, and the other end portion 6b is connected to the mass portion 5 in that direction. The mass portion 5 can vibrate more than the frame portion 3, and this acts to reduce the vibration of the frame portion 3.

[0020] The vibration-proofing member 1 is capable of not only reducing vibrations in a specific frequency band, but also suppressing the transmission of vibrations in other frequency bands. In particular, the vibration transmissibility is set to less than 1 (less than 0 dB) for vibrations in a resonant frequency band that is lower than the frequency band that is the main target of vibration isolation, so that the vibrations can be reduced and transmitted. In this embodiment, the vibrations can be reduced near the resonant frequency by simultaneously resonating with the vibrating part 4 in a frequency band close to the resonant frequency of the entire vibration-proofing structure including not only the vibration-proofing member 1 but also the mass body 8, and canceling each other out.

[0021] In this embodiment, the size of the entire vibration-proof member 1 is determined according to the frequency band that is the main target for vibration isolation, and the size and shape of the mass portion 5 and the connecting piece portion 6 are determined according to the resonance frequency of the entire vibration-proof structure, which includes not only the vibration-proof member 1 but also the mass body 8, thereby making it possible to reduce vibration over a wide frequency band including the resonance frequency. By appropriately setting the size and shape of the mass portion 5 and the connecting piece portion 6 without changing the material or basic structure, the vibration-proof member 1 of this embodiment can achieve a vibration reduction effect over a wide frequency band including the resonance frequency.

[0022] As described above, in the vibration-proof member 1 of this embodiment, the vibration can be reduced by the structure itself consisting of the frame portion 3 having the through hole 2, the mass portion 5, and the connection piece portion 6. That is, the vibration-proof member 1 of this embodiment is not configured to reduce vibration by the characteristics or composition of the resin material. Moreover, the desired vibration-proof effect can be obtained without changing the material by adjusting the dimensions of each portion of the vibration-proof member 1 according to the frequency of the vibration that is desired to be reduced. Therefore, the vibration-proof member 1 of this embodiment has a high degree of freedom in materials, and various materials can be used to obtain the desired natural frequency. Even if the vibration-proof member 1 of this embodiment is formed from a material that is not generally used for vibration prevention, it can achieve an excellent vibration-proof effect. In addition, the frame portion 3 and the vibration portion 4 are located on the same plane, have a simple shape, and can be integrally formed from the same resin material. Therefore, it can be easily manufactured and handled by, for example, injection molding, molding with a 3D printer, or processing a resin molded product to remove parts other than the frame portion 3 and the vibration portion 4. The space inside the through hole 2 other than the portion where the vibrating part 4 is located is left unfilled and open, and there is no need to fill it with a material other than the vibration-proof member 1, so it can be easily manufactured at low cost. The size of the vibration-proof member 1 can be set arbitrarily depending on the application and the frequency band of vibration to be damped. The number of through holes 2 and vibrating parts 4 of the vibration-proof member 1 can also be set arbitrarily. The connecting piece part 6 is not limited to being a single rod as shown in FIG. 1, but may be configured to be branched into multiple parts and connected to the mass part 5.

[0023] The vibration-proof member 1 having the above-described configuration is placed on a flat surface member (not shown, for example, an iron plate or trim) inside a vehicle such as an automobile, an unmanned aerial vehicle such as a drone, or a building, and is used as a vibration-proof rubber, soundproofing material, or the like. The vibration-proof member 1 having this configuration is also installed inside a home appliance such as a washing machine, a refrigerator, a dishwasher, a microwave oven, an air conditioner, or various industrial equipment, and can reduce vibrations transmitted from a rotating body such as a motor or a compressor. The vibration-proof member 1 having this configuration can also be used as a vibration-proof pad installed between a vibration source such as an outdoor unit, a motor, or heavy machinery, and a floor, the ground, or the like. In this vibration-proof member 1, when the frame part 3 resonates in accordance with the vibration of the foundation 7 or the mass body 8, the vibration part 4 also resonates at the same time, and the vibration of the frame part 3 is attenuated. In this way, the frame part 3 and the vibration part 4 act together to reduce the vibration transmitted from the foundation 7 or the mass body 8 to the frame part. In either case, by taking into consideration the load L due to the mass 8 placed on the upper surface 3a of the frame portion 3 and setting the dimensions, shape, etc. of the vibrating portion 4, etc., a vibration reduction effect can be obtained over a wide frequency band including the resonant frequency.

[0024] [Second embodiment] FIG. 2 shows a schematic front view of a vibration-proof structure according to a second embodiment of the present invention. In this embodiment, a plurality of vibration-proof members 1 similar to those in the first embodiment are arranged side by side on a foundation 7, and a mass body 8 is placed on the upper surface 3a of the frame portion 3 of the vibration-proof members 1. Even in this configuration, the vibration reduction effect can be obtained over a wide frequency band including the resonance frequency by setting the dimensions and shape of each vibration portion 4, etc., taking into consideration the load received from the mass body 8. Although not shown in FIG. 2, a plurality of vibration-proof members 1 may be arranged side by side in the depth direction, i.e., in the direction perpendicular to the paper surface. In addition, the frame portions 3 of a plurality of vibration-proof members 1 may be integrated. In that case, a plurality of through holes 2 of the same shape are formed in a large frame portion 3, and a vibration portion 4 of the same shape is arranged in each through hole 2, resulting in a configuration in which a plurality of spring mass resonators with the same characteristics are arranged side by side. According to the vibration-proof structure of this embodiment, vibration can be effectively reduced in a wide space. The size of this vibration-proof member 1 is not limited and can be set arbitrarily according to the application. EXAMPLES

[0025] Specific examples of the present invention and comparative examples will be described below. [Example 1] The vibration-proof member 1 of the first embodiment shown in FIG. 1 was produced, and the vibration-proof effect of this vibration-proof member 1 was determined. The vibration-proof member 1 is made of a styrene-based elastomer, and its Young's modulus is 20 MPa. The outer shape of the frame portion 3 is 20 mm wide x 20 mm deep x 20 mm high. The inner circumference of the through hole 2 is 16.8 mm wide x 20 mm deep x 16.8 mm high. The outer shape of the mass portion 5 is 12.5 mm wide x 20 mm deep x 12 mm high. The inner circumference of the opening 5a is 2.5 mm wide x 20 mm deep x 9.6 mm high. The length of the connection piece portion 6 is 1.6 mm, the width is 1.6 mm, and the depth is 20 mm. In order to obtain the vibration-proofing effect of the vibration-proofing structure of this embodiment, a vibration table was used as the base 7, the lower surface 3b of the frame part 3 of the vibration-proofing member 1 was placed on the vibration table 7, and a 20g weight, which is an example of the mass body 8, was placed on the upper surface 3a of the frame part 3. Then, a vibration S of a certain magnitude was generated in the vertical direction V from the vibration table 7, that is, in the direction toward the weight 8. The vibration S generated in this way on the vibration table 7 was compared with the vibration measured on the weight 8 to calculate the vibration transmissibility at each frequency. Then, the average vibration transmissibility in a specific frequency band was calculated and evaluated. Specifically, when the average vibration transmissibility was less than 0 dB, it was judged as ◯: vibration transmission decrease, when the average vibration transmissibility was 0 dB or more and less than 8 dB, it was judged as △: vibration transmission increase (small), and when the average vibration transmissibility was 8 dB or more, it was judged as ×: vibration transmission increase (large). The evaluation results are shown in Table 1. The vibration measurement was performed at one measurement point per resolution: 1.5625 Hz.

[0026] [Table 1]

[0027] [Example 2] As Example 2 of the present invention, a vibration-proof member 1 shown in FIG. 3(A) was produced. The vibration-proof member 1 of this example does not have an opening 5a formed in the mass portion 5, and other configurations are similar to those of the vibration-proof member 1 of Example 1, so description thereof will be omitted. As shown in FIG. 3(B), the lower surface 3b of the frame portion 3 of this vibration-proof member 1 was placed on a vibration table 7, and a weight 8 of 20 g was placed on the upper surface 3a of the frame portion 3. Then, the average vibration transmissibility in each frequency band was calculated and evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

[0028] [Comparative Example 1] As Comparative Example 1, a vibration-proof member shown in FIG. 4(A) was produced. This vibration-proof member consists only of a frame portion 3, and does not have a vibrating portion 4. The structure of the frame portion 3 is similar to that of the frame portion 3 of the vibration-proof member 1 of Example 1, and therefore a description thereof will be omitted. This vibration-proof member, i.e., the lower surface 3b of the frame portion 3 was placed on a vibration table 7, and a weight 8 of 20 g was placed on the upper surface 3a of the frame portion 3. Then, the average vibration transmissibility in each frequency band was calculated and evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

[0029] [Comparative Example 2] As Comparative Example 2, a vibration-proof member 9 shown in FIG. 5(A) was produced. This vibration-proof member 9 is made of EPDM (ethylene propylene diene rubber) and has a Young's modulus of 13 MPa. The vibration-proof member 9 is a rectangular parallelepiped with an outer shape of 8 mm wide x 8 mm deep x 5 mm high. The lower surface 9b of this vibration-proof member 9 was placed on the vibration table 7, and a weight 8 of 20 g was placed on the upper surface 9a. Then, the average vibration transmissibility in each frequency band was calculated and evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

[0030] [result] Comparing the above-mentioned Examples 1-2 of the present invention with Comparative Examples 1-2, it is found that the vibration-proofing member 1 of the present invention provides a vibration-proofing effect. In these Examples 1-2 and Comparative Examples 1-2, the frequency band of 400 Hz or more and less than 2000 Hz is the main target of vibration reduction, and in both cases, vibration transmission is reduced and a good vibration-proofing effect is obtained. However, in Comparative Examples 1-2, vibration transmission is increased in the resonant frequency band (resonant region, in this example, a frequency band of 200 Hz or more and less than 400 Hz) that is lower in frequency than the frequency band (vibration-proof region) that is the main target of vibration reduction. On the other hand, in Examples 1-2, vibration transmission is reduced not only in the vibration-proof region but also in the resonant region. In particular, comparing Examples 1-2 and Comparative Example 1, it is clear that the provision of the vibrating part 4 makes it possible to reduce the transmission of vibration in the resonant frequency band without amplifying it. [Explanation of symbols]

[0031] 1,9 Vibration-proof members 2 Through holes 3 Frame section 3a,9a top surface 3b,9b Bottom surface 4. Vibration section 5 parts by mass 5a opening 6 Connection piece 6a One end 6b Other end 6c middle part 7 Foundation (vibration table) 8 Mass body (weight)

Claims

1. A three-dimensional frame portion having a through hole, and a vibration portion located within the through hole and extending in the same direction as the through hole, The vibration portion has a mass portion and a connection piece portion, the connecting piece portion has one end connected to an inner periphery of the through hole and the other end connected to the mass portion, The space inside the through hole is open except for a portion where the vibration portion is located, the mass portion and the connection piece portion form a spring mass resonator, the frame portion, the mass portion, and the connection piece portion are integrally formed, one of the outer surfaces of the frame portion is a load-bearing surface that receives a load in a direction perpendicular to the one of the outer surfaces, The vibration-proof member, wherein the vibrating portion vibrates in at least the same direction as the load.

2. The vibration-isolating member according to claim 1 , wherein the frame portion is a hollow cube.

3. 3. The vibration-proof member according to claim 1, wherein a vibration direction of said frame portion and a vibration direction of said vibrating portion are aligned with each other.

4. The vibration-isolating member according to claim 3 , wherein the vibrating portion vibrates more strongly than the frame portion.

5. 3. The vibration-proof member according to claim 1, wherein the size and shape of said vibrating portion are set in accordance with the magnitude of said load.

6. The vibration-isolating member according to claim 1 , wherein the mass portion is provided with an opening.

7. The vibration-isolating member according to claim 1 or 2, and a mass body placed on an upper surface of the frame portion, A vibration-proof structure, characterized in that the upper surface of the frame portion is the load-bearing surface that receives a load from the mass body.

8. The vibration-proof structure according to claim 7 , wherein the lower surface of the frame portion is placed on a foundation.

9. The vibration-isolating structure according to claim 8 , wherein a plurality of the vibration-isolating members are arranged side by side on the foundation, and the mass body is placed on the plurality of the vibration-isolating members.

10. a vibration-proof member having a three-dimensional frame portion with a through hole, and a vibration portion located within the through hole and extending in the same direction as the through hole, the vibration portion having a mass portion and a connection piece portion, one end of the connection piece portion being connected to the inner circumference of the through hole and the other end being connected to the mass portion, the space inside the through hole other than the portion where the vibration portion is located is open, the mass portion and the connection piece portion form a spring mass resonator, the frame portion, the mass portion and the connection piece portion are integrally formed using a vibration-proof member, A load is applied to at least one of the outer surfaces of the frame portion in a direction perpendicular to the surface, A vibration isolation method, comprising the steps of: vibrating the vibrating part in at least the same direction as the load, thereby reducing vibration of the frame part in that direction.

11. The vibration isolation method according to claim 10, wherein the frame portion is a hollow cube.

12. The vibration isolation method according to claim 10 or 11, wherein the vibration portion is vibrated more strongly than the frame portion.

13. The vibration isolation method according to claim 10 or 11, wherein the mass portion is provided with an opening.

14. 12. The vibration isolation method according to claim 10, wherein the dimensions and shape of the vibrating portion are set in accordance with the magnitude of the load.

15. The lower surface of the frame portion is placed on a foundation, The vibration isolation method according to claim 10 or 11, further comprising the step of placing a mass body on the upper surface of the frame portion and applying the load from the mass body to the upper surface.

16. The vibration isolation method according to claim 15 , further comprising arranging a plurality of the vibration isolation members side by side on the foundation, and placing the mass body on the plurality of the vibration isolation members.

Images