JP2007032677A - Sound and vibration isolator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound-insulation vibration-insulation device capable of sufficiently blocking solid born sound though it is compact, and preventing amplification of vibration of a machine. <P>SOLUTION: This sound-insulation vibration-insulation device has a layered product obtained by alternately stacking rubber bodies 2 and metallic plates 3. The metallic plate 3 has an engagement portion kept into contact with an outer peripheral face of the rubber body 2 adjacent thereto in a loaded state receiving compression force in the direction vertical to a surface of the metallic plate, and having a height h<SB>2</SB>lower than a clearance h<SB>1</SB>between the metallic plates 3, 3 adjacent to each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention supports a machine that generates noise accompanying vibration, for example, an impact punching machine, and blocks solid-propagating sound from noise generated from the machine and prevents amplification of vibration of the machine itself. The present invention relates to a soundproof and vibration-proof device.

  Machines that generate noise due to vibration, especially impact punching machines (in the following description, not limited to punching machines, but referred to as “punching machines” or simply “machines”), how to block the noise is a problem. It becomes.

  In general, punching machine noise propagates through air and solids. Therefore, in order to prevent the noise of the punching machine, it is necessary to take measures for both the air propagation sound and the solid propagation sound.

  Noise due to air propagation can be significantly blocked by surrounding the entire machine with a sound insulation wall.

  On the other hand, noise due to solid propagation can be considerably blocked by supporting the machine with an elastic body such as rubber.

  FIG. 7 shows an example of a conventional machine noise prevention apparatus.

  As shown in FIG. 7, the conventional machine noise prevention device 30 is configured such that a punching machine 31 is supported by a rubber body 32 and the entire outside of the punching machine 30 supported by the rubber body 32 is surrounded by a sound insulation wall 33.

  According to the conventional noise prevention device 30, the sound insulation wall 33 can block the sound transmitted through the air and prevent the noise due to the air propagation.

  Further, by supporting the machine 31 with the rubber body 32, it is possible to prevent the rubber body 32 from being elastically deformed in accordance with the forced vibration of the machine and transmitting the vibration of the machine 31 to the fixed base 34 or the like. .

  However, the rubber body 32 of the conventional noise prevention device 30 has a problem of amplifying the vibration of a machine, which will be described later, and the present invention solves the above problem, but has a structure similar to the present invention. There is known a laminated rubber for seismic isolation or vibration isolation (hereinafter referred to as “laminated rubber for vibration isolation”).

  These vibration-isolating laminated rubbers are mainly used for supporting building structures.

  A known laminated rubber for vibration isolation has a laminate composed of a plurality of layers in which metal plates and vibration isolation rubber are alternately laminated.

  The vibration isolation laminated rubber cushions the impact in the vertical direction by the elastic expansion and contraction in the vertical direction of the vibration isolation rubber. In addition, the laminated rubber for vibration isolation uses relative displacement between the building structure and the ground by the displacement of the upper and lower surfaces of the vibration isolation rubber (if there are multiple layers, the total displacement of the upper and lower surfaces of the vibration isolation rubber of each layer). Absorb the displacement and prevent the forced horizontal vibration of the ground from being transmitted to the building structure.

The metal plate included in the vibration-isolating laminated rubber has a function of increasing the compressive strength of the laminated body while allowing a deviation between the upper surface and the lower surface of the vibration-isolating rubber.
JP-A-9-88189 JP 2003-176843 A

  As described above, the conventional noise prevention device supports the machine by the rubber body.

  As described above, the rubber body is elastically deformed to absorb the vibration of the machine, and acts so as not to transmit the vibration of the machine to a fixed base or the like. The rubber body has an effect of sound absorption as well as an action of vibration absorption, and blocks solid propagation sound caused by machine vibration.

  However, the rubber body is elastically deformed in the vertical direction and is also greatly elastically deformed in the horizontal direction.

  In particular, when a high rubber body is used to sufficiently block the vibration in the vertical direction of the machine, the displacement between the upper surface and the lower surface of the rubber body increases, and the horizontal elastic deformation increases.

  When the vibration of the machine itself is amplified, the machining accuracy of the machine is reduced.

  The increased elastic deformation of the rubber body in the horizontal direction often amplifies the vibration of the machine itself. This is because the natural frequency of the rubber body in the horizontal direction is close to the forced vibration of the machine and is likely to resonate.

  For the above problem, it is conceivable to increase the rigidity against the horizontal displacement of the rubber body (deviation of the upper and lower surfaces of the rubber body) and increase the natural frequency of the rubber body in the horizontal direction to make it difficult to resonate with the machine. . In order to increase the rigidity against the horizontal displacement of the rubber body, it is conceivable to increase the horizontal sectional area as compared with the height of the rubber body.

  However, if the horizontal cross-sectional area is increased with the height of the rubber body as it is, the installation area of the rubber body is undesirably increased. On the contrary, if the height is lowered while the horizontal cross-sectional area of the rubber body is kept as it is, there is a problem that the solid propagation sound of the machine cannot be sufficiently blocked.

  Therefore, the problem to be solved by the present invention is to provide a sound and vibration isolator which is small and can sufficiently block solid propagation sound and can prevent amplification of mechanical vibration.

The sound and vibration isolator according to the present invention is
It has a laminate made by alternately laminating rubber bodies and metal plates,
The metal plate is in contact with the outer peripheral surface of the adjacent rubber body in a loaded state in which a compressive force in a direction perpendicular to the surface of the metal plate is applied, and has a height lower than a gap between adjacent metal plates. It has the joint part, It is characterized by the above-mentioned.

  The engaging portion may be in contact with the entire outer peripheral surface of the rubber body in the load state described above.

  The rubber body may be sandwiched between the top surface of the engaging portion of one adjacent metal plate and a part of the other adjacent metal plate in the loaded state described above.

The laminate has a through hole in a direction perpendicular to the surface of the metal plate,
Inserting the through hole, fastening the fixed base and the base of the machine of the forced vibration source across the laminate, and against the movement of the machine of the forced vibration source in a direction parallel to the surface of the metal plate It is possible to have a fastening member that generates frictional resistance.

  The sound and vibration isolator according to the present invention has a laminate formed by alternately laminating rubber bodies and metal plates, and the metal plates are loaded under a compressive force in a direction perpendicular to the surface of the metal plates. Thus, it has an engaging portion that is in contact with the outer peripheral surface of the adjacent rubber body and has a height lower than the gap between the adjacent metal plates.

  According to the present invention, solid propagation sound can be blocked by the difference in acoustic resistance between the metal plate and the rubber body.

上式において、Ｚ^Ａは音響インピーダンス、ｐは音場内の一点の音圧（Ｐａ）、ξは前記点の粒子速度（ｍ／ｓ）、Ｓは粒子速度に垂直な微小面積（ｍ^２）、Ｒ^Ａは音響抵抗、Ｘ^Ａは音響リアクタンスである。 Here, the acoustic resistance refers to the real part of the acoustic impedance, and the acoustic impedance is represented by the following equation.

In the above formula, Z ^A is the acoustic impedance, p is the sound pressure of a point sound field (Pa), particle velocity (m / s) of ξ is the point, S is perpendicular minute area to particle velocity (m ^2), R ^A is acoustic resistance and X ^A is acoustic reactance.

  When sound passes between two materials that have a large difference in acoustic resistance, the acoustic energy has the property of being reflected.

  When acoustic energy tries to enter the metal plate from the rubber body, there is a large difference in acoustic resistance between them, so that most of the acoustic energy is reflected.

  In the sound and vibration isolator of the present invention, the metal plates and the rubber bodies are alternately laminated in a plurality of layers, so that the acoustic energy is reflected in each layer and the solid propagation sound can be well blocked.

  On the other hand, according to the present invention, the rigidity against the horizontal displacement of the rubber body is high.

  That is, according to the present invention, the engaging portion of the metal plate abuts on the outer peripheral surface of the rubber body in the loaded state, and the engaging portion has a height lower than the gap between the adjacent metal plates.

  The portion of the rubber body that is in contact with the engaging portion of the metal plate is held by the engaging portion of the metal plate and cannot be displaced in the horizontal direction.

  The portion that can be displaced in the horizontal direction is limited to a slight height portion that is not in contact with the engaging portion of the metal plate in the thickness of the rubber body. Since the height of this portion is low, the distance that the upper and lower surfaces are displaced is small. Moreover, the rigidity with respect to the horizontal shift is high.

  For this reason, the horizontal displacement of the rubber body is limited, and the vibration of the machine can be prevented from being amplified by the horizontal displacement of the rubber body.

  In the present invention, the rubber body can be sandwiched between the top surface of the engaging portion of one of the adjacent metal plates in a loaded state and a part of the other adjacent metal plate.

  According to the present invention, a rubber body always exists between the adjacent metal plates from the beginning of the loaded state, and the metal plates do not touch each other and generate noise when subjected to forced vibration.

  In the present invention, the laminated body has a through-hole in a direction perpendicular to the surface of the metal plate, the fastening fitting is inserted through the through-hole, and the fixed base and the machine base are fastened with the laminated body interposed therebetween. Frictional resistance can be created against machine movement in a direction parallel to the plane of the plate.

  According to the present invention, by tightening the fastening bracket, it is possible to limit the horizontal swing of the machine base relative to the fixed base by the frictional resistance. As a result, when the force to move the machine in the horizontal direction is smaller than the frictional resistance of the fastener, the machine is fixed and does not vibrate in the horizontal direction. Even in this state, the acoustic energy of the solid propagation sound of the machine is reflected and effectively cut off at the boundary between the metal plate and the rubber body due to the large difference in acoustic resistance between the two.

  When the force to move the machine in the horizontal direction is greater than the frictional resistance of the fastener, the machine swings horizontally against the dynamic frictional resistance of the fastener, The vibration of the machine is not amplified by the total resistance of the rigidity against the displacement of the upper and lower surfaces of the rubber body.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows an exploded view of a sound and vibration isolator according to an embodiment of the present invention.

  As shown in FIG. 1, the sound and vibration isolator 1 of this embodiment includes a plurality of rubber bodies 2 (three in the example of FIG. 1) and a plurality of metal plates 3 (three in the example of FIG. 1). Are stacked alternately.

  A metal plate 5 that protects the uppermost rubber body 2 is provided on the upper surface of the laminate 4 as necessary.

  The metal plate 3 has a plate-like main part (having a circular surface in the example of FIG. 1, but is not limited to this shape), and comes into contact with the outer peripheral surface of the rubber body 2 at the peripheral edge thereof. It has an engaging part 3a.

  The rubber body 2 may be either natural rubber or synthetic rubber.

  FIG. 2 shows a state where the sound and vibration isolator 1 is assembled and installed, that is, a loaded state. The loaded state refers to a state where the sound and vibration isolator 1 supports the machine and receives a compressive force in a direction perpendicular to the surface of the metal plate 3. Normally, the metal plate 3 is installed horizontally, but the metal plate 3 is not always horizontal depending on the installation conditions.

As shown in FIG. 2, the engagement portion 3 a of the metal plate is in contact with the outer peripheral surface of the rubber body 2 in the loaded state. The engaging portion 3 a has a height h ₂ that is lower than the gap h ₁ between the adjacent metal plates 3.

  The metal plate engaging portion 3a is preferably in contact with the entire outer peripheral surface of the rubber body 2, but is in contact with a part of the outer peripheral surface of the rubber body 2 so as to limit only vibration in a necessary direction. You may do it.

  In the sound and vibration isolator 1 of the present embodiment, the rubber body 2 is sandwiched between the top surface of the engaging portion 3a of one adjacent metal plate and the bottom surface of the other adjacent metal plate 3 in the loaded state. Yes. That is, a part of the rubber body 2 is interposed between the adjacent metal plates 3.

  FIG. 3 shows before and after assembly of the laminate 4.

  As shown in FIG. 3, the outer peripheral surface of the rubber body 2 of the present invention may not be in contact with the engaging portion 3a of the metal plate before assembly.

  In the loaded state, a compressive force perpendicular to the surface of the metal plate 3 is applied, so that the rubber body 2 expands in the lateral direction and its outer peripheral surface comes into contact with the engaging portion 3a of the metal plate. In the present embodiment, the rubber body 2 further expands in the lateral direction and enters between the bottom surface of the metal plate 3 or 5 and the top surface of the engagement portion 3a of the metal plate, and is interposed between the two.

  Next, the operation of the sound and vibration isolator of the present invention will be described.

  FIG. 4 shows a comparison between the operation of the sound and vibration isolator of the present invention and the operation of a known vibration-isolating laminated rubber having a seemingly similar structure. FIG. 4A shows a state in which the sound and vibration isolator of the present invention is displaced in the horizontal direction due to the forced vibration of the machine. On the other hand, FIG. 4B shows a state in which a known vibration-isolating laminated rubber (Japanese Patent Laid-Open No. 9-88189) is displaced in the horizontal direction due to external forced vibration such as an earthquake.

  FIG. 4B shows one end of the laminated body of the vibration-isolating laminated rubber, and an enlarged end portion thereof.

  In FIG.4 (b), the code | symbol 6 has shown the rubber | gum for lamination | stacking. Reference numeral 7 denotes the lower part of the upper metal plate of the lamination rubber 6, and reference numeral 8 denotes the upper part of the lower metal plate of the lamination rubber 6.

  Protrusions 7a and 8a are formed on the peripheral edges of the upper metal plate 7 and the lower metal plate 8, respectively.

  The top surfaces of the protrusions 7a and 8a are opposed to each other with a predetermined gap.

  In a known laminated body of vibration-isolating laminated rubber, the laminating rubber 6 and the metal plate (7 or 8) are alternately laminated and have a plurality of these layer structures.

  The laminated body of the known vibration-isolating laminated rubber has a structure in which the outer peripheral surface 6a of the laminating rubber is not in contact with the inner peripheral surfaces of the protrusions 7a and 8a of the upper metal plate 7 and the lower metal plate 8 in a loaded state. It has become. In this respect, the structure differs from the present invention in which the outer peripheral surface of the rubber body is in contact with the engaging portion of the metal plate in the loaded state.

  A known laminated rubber laminate for vibration isolation is designed to support a sufficiently large load and to allow a large horizontal displacement.

  When the rubber for lamination is increased in height (thickness), a sufficiently large horizontal shift is allowed, but the possibility of buckling increases.

  The known vibration-isolating laminated rubber (Japanese Patent Laid-Open No. Hei 9-88189) shown in FIG. 4B increases the height of the rubber for lamination, while preventing the rubber from buckling. Is provided. In other words, the projections 7a and 8a allow the top surfaces of the projections 7a and 8a to slide against each other when large deformation occurs, preventing buckling of the laminating rubber, and relative to the metal plates 7 and 8. To prevent incline.

  Incidentally, the vibration-isolating laminated rubber disclosed in Japanese Patent Application Laid-Open No. 2003-176843 is for reducing the thickness of the laminating rubber and increasing the supporting load, while preventing the rigidity against horizontal displacement from becoming excessive. A space is provided inside the rubber for lamination. This is because a sufficiently large load can be supported and a sufficiently large horizontal shift can be allowed. The vibration-isolating laminated rubber disclosed in Japanese Patent Application Laid-Open No. 2003-176843 does not have a structure in which a protrusion is provided on the peripheral edge of the metal plate and the rubber contacts the peripheral edge of the metal plate.

  4B, when forced vibration is applied in the horizontal direction due to an earthquake or the like, the upper surface and the lower surface of the lamination rubber 6 are displaced to absorb the movement of the forced vibration.

  When the upper and lower surfaces of the laminating rubber 6 are displaced, the outer peripheral surface 6a is inclined as indicated by reference numerals 6a 'and 6a' 'in FIG. The vertex of the outer peripheral surface 6a of the laminating rubber swings horizontally between the left and right points m and n around the point o in FIG. 4B.

  However, in this known vibration-isolating laminated rubber, the outer peripheral surface 6a of the laminating rubber does not contact the protrusions 7a and 8a of the metal plates 7 and 8 at any time. As a result, a sufficiently large displacement between the upper and lower surfaces of the laminating rubber 6 can be allowed, and a large forced vibration in the horizontal direction such as an earthquake can be absorbed.

  On the other hand, in the soundproof and vibration isolator 1 of the present invention, a part of the outer peripheral surface of the rubber body 2 in the height direction is in contact with the inner peripheral surface of the engaging portion 3a of the metal plate in a loaded state.

When subjected to a forced vibration in the horizontal direction of the machine, the rubber body 2 of the sound and vibration isolator 1 is shifted in the horizontal direction only in the thickness portion of h ₁ -h ₂ , and the top portion is centered on a point o. Swings horizontally between points m and n.

  By being able to swing in the horizontal direction only small, the horizontal vibration of the machine itself is not amplified.

  Further, by swinging in a small horizontal direction, that is, by not completely restraining the horizontal vibration of the machine, it is possible to prevent the horizontal vibration of the machine from being transmitted to the base or the like.

  Further, the sound and vibration isolator 1 of the present invention is sandwiched between the top surface of the engaging portion 3a of one metal plate adjacent to the rubber body 2 in a loaded state and a part of the other metal plate 3, 5 adjacent. As a result, the metal plates do not come into contact with each other to transmit the solid propagation sound.

The sound and vibration isolator 1 of the present invention has a high rigidity against a horizontal displacement of the rubber body 2 and a small horizontal cross-sectional area because the upper and lower surfaces of the rubber body 2 are displaced only in the thickness portion of h ₁ -h _2. However, it is possible to realize a sound and vibration isolator that has the same rigidity as a rubber body having a large horizontal cross-sectional area and prevents the vibration of the machine while the horizontal cross-sectional area is small.

  The soundproof and vibration isolator 1 of the present invention employs a method different from that of the conventional soundproofing device with respect to blocking solid propagation sound.

  The conventional soundproofing device cuts off the solid propagation sound by the buffering and soundproofing functions of the rubber itself. As described above, when the solid-propagating sound is cut off by the action of buffering and soundproofing the rubber itself, the rubber is required to have a certain thickness (distance of the sound propagation path).

  The sound and vibration isolator 1 of the present invention utilizes the difference in acoustic resistance between metal and rubber.

  When the acoustic energy tries to enter the metal plate 3 from the rubber body 2, the acoustic energy is mostly reflected at the boundary surface because there is a large difference in acoustic resistance between the rubber body 2 and the metal plate 3.

  The sound and vibration isolator 1 of the present invention has a plurality of acoustic energy reflecting surfaces because the metal plates 3 and the rubber bodies 2 are alternately laminated, and can well block solid propagation sound.

  That is, according to the present invention, even when the sound propagation distance is short, the acoustic energy can be reflected by the boundary surfaces between the plurality of metal plates and the rubber body.

  As described above, the present invention does not amplify the horizontal vibration of the machine even if the horizontal cross-sectional area is small, and has solid metal propagation with a boundary surface between a plurality of metal plates and a rubber body in a low height. Sound can be cut off.

  As a result, according to the present invention, it is possible to realize a sound and vibration isolator that is small and can sufficiently block solid propagation sound and can prevent amplification of mechanical vibration.

  Next, another embodiment of the present invention will be described.

  FIG. 5 shows a sound and vibration isolator 9 according to another embodiment of the present invention.

  The sound and vibration isolator 9 has a laminate 12 in which a plurality of rubber bodies 10 (four in the example of FIG. 5) and a plurality of metal plates 11 (four in the example of FIG. 5) are alternately laminated. ing. A metal plate 13 that protects the uppermost rubber body 10 is provided on the upper surface of the laminated body 12 as necessary.

  The metal plate 11 has a plate shape, and has an engaging portion 11 a that abuts on the outer peripheral surface of the rubber body 10 at the peripheral portion thereof.

  The sound and vibration isolator 9 is in a loaded state, and the outer peripheral surface of the rubber body 10 is in contact with the inner peripheral surface of the engaging portion 11a of the metal plate. The metal plate engaging portion 11 a has a height lower than the gap between the adjacent metal plates 11.

  However, in this embodiment, the rubber body 10 is sandwiched between the top surface of the engaging portion 11a of one metal plate adjacent to the rubber body 10 and the bottom surface of the other adjacent metal plates 11 and 13 in the loaded state. It has not been. As in this embodiment, according to the present invention, the rubber body 10 can be appropriately expanded between the metal plates so as not to intervene depending on the magnitude of the vibration of the machine.

  In the present invention, as in this embodiment, the caulking 14 can be applied to the top and the outer periphery of the engaging portion 11a of the metal plate.

  The caulking 14 can greatly reduce the transmission of the solid propagation sound even if the metal plates are in contact with each other.

  As shown in FIG. 5, the edge of the rubber body 10 can be appropriately chamfered or rounded (R). In this case, the lower part of the outer peripheral surface of the rubber body 10 may not be in close contact with the lower corner portion of the engaging portion 11a of the metal plate. However, the outer peripheral surface of the rubber body 10 is in contact with the main portion of the upper portion of the engaging portion 11a.

  FIG. 6 shows still another embodiment of the present invention.

  In the present embodiment, in addition to the rigidity against the displacement of the upper and lower surfaces of the rubber body, the vibration in the horizontal direction of the machine is suppressed by the frictional resistance of the fastener.

  The sound and vibration isolator 15 of this embodiment has a laminated body 19 of a rubber body 16 and metal plates 17 and 18.

  The rubber body 16 is in contact with the engaging portion 17 a of the metal plate 17 in the loaded state. In the example of FIG. 6, a part of the rubber body 16 bulges between the top surface of the metal plate engaging portion 17a and the bottom surfaces of the other metal plates 17 and 18 in the loaded state.

  The laminate 19 has a through hole 20 in a direction perpendicular to the surfaces of the metal plates 17 and 18.

  Reference numeral 21 denotes a part of a machine base that is a forced vibration source. A machine main body (not shown) is installed on the machine base 21.

  Reference numeral 22 denotes a fixed base for supporting the machine. The fixed base (referred to as the fixed base 22) is a floor, a support base, a foundation or the like.

  The sound and vibration isolator 15 has a fastener that generates a frictional resistance against the movement of the machine in the direction parallel to the surfaces of the metal plates 17 and 18.

  In the present embodiment, the fastening bracket includes a plate member 23 that generates frictional resistance with respect to the machine base 21, and a bolt that fastens the machine bases 21 and 22 with the laminate 19 interposed therebetween via the plate member 23. 24.

  The fastening hardware is not limited to the plate member 23 and the bolt 24, and any known fastening hardware can be used. Further, the fastening bracket can include a buffer spring or other elastic body between the plate member 23 and the top of the bolt 24 in order to block the solid propagation sound.

  In order to attach the sound and vibration isolator 15 of the present embodiment, a machine (machine base 21) is disposed on the laminate 19, and a plate member 23 is placed on the machine base 21 to penetrate the laminate 19. The bolt 24 is inserted so as to pass through the hole 20, and the tip of the bolt 24 is engaged with the fixed base 22 to be tightened.

  By tightening the bolts 24 with a predetermined torque, the lower surface of the plate member 23 and the upper surface of the machine base 21 are brought into close contact with each other, and a predetermined frictional resistance is generated against horizontal movement.

  Between the inner peripheral surface of the through-hole 20 and the bolt 24, play is provided so that the laminated body 19 does not come into contact with the bolt 24 when the upper and lower surfaces thereof are displaced and deformed.

  The through hole of the machine base 21 does not need to have the same diameter as the through hole 20 but has an inner diameter that does not contact the bolt 24 when the upper and lower surfaces of the laminate 19 are displaced and deformed. .

  The sound and vibration isolator 15 of the present embodiment can limit the horizontal swing of the machine base 21 with respect to the fixed base 22 by the frictional resistance of the fastening bracket.

  When the force to move the machine in the horizontal direction is smaller than the frictional resistance of the fastener, the machine is fixed and hardly vibrates in the horizontal direction. Even in this state, the solid propagation sound of the machine can be effectively blocked by the large difference in acoustic resistance between the metal plate and the rubber body. Note that it is more effective when a spring or an elastic body is interposed between the bolt 24 and the plate member 23.

  When the force to move the machine in the horizontal direction is greater than the frictional resistance of the fastener, the machine swings horizontally against the dynamic frictional resistance of the fastener. However, the horizontal vibration of the machine is subjected to the total resistance of the dynamic friction resistance of the fastening bracket and the resistance against the displacement of the rubber body 16 held by the engaging portion 17a of the metal plate 17. Thereby, the horizontal vibration of the machine is greatly suppressed. Even when the machine vibrates in the horizontal direction, the solid propagation sound of the machine is effectively cut off.

  In the above description, the engaging portion of the metal plate has been described so as to rise in one direction from the surface of the metal plate. However, it may be extended from the surface of the metal plate in the vertical direction.

The perspective view which decomposed | disassembled and showed the sound-proof vibration isolator by one Embodiment of this invention. The longitudinal cross-sectional view of the loading state of the soundproof vibration isolator by one Embodiment of this invention. Explanatory drawing which showed before and after the assembly of the laminated body of the sound-proof vibration isolator by one Embodiment of this invention. Explanatory drawing which showed the effect | action of the soundproof vibration isolator of this invention compared with the well-known laminated rubber for vibration isolation. The longitudinal cross-sectional view of the loading state of the soundproof vibration isolator by one Embodiment of this invention. The longitudinal cross-sectional view of the loading state of the soundproof vibration isolator by one Embodiment of this invention. Explanatory drawing which shows the soundproofing apparatus of the conventional machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Soundproof vibration isolator 2 Rubber body 3 Metal plate 3a Metal plate engaging part 4 Laminate body 5 Metal plate 6 Lamination rubber 6a of laminated rubber for vibration isolation Outer peripheral surface of lamination rubber 7 Metal plate of upper layer of lamination rubber 7a Metal plate protrusion 8 Metal plate 8a under the laminating rubber 8a Metal plate protrusion 9 Soundproof and vibration isolator 10 Rubber body 11 Metal plate 11a Metal plate engagement portion 12 Laminate 13 Metal plate 14 Coking 15 Soundproof Vibration device 16 Rubber body 17 Metal plate 17a Metal plate engagement portion 18 Metal plate 19 Laminate 20 Through hole 21 Machine base 22 Fixed base 23 Plate member 24 Bolt

Claims (4)

It has a laminate made by alternately laminating rubber bodies and metal plates,
The metal plate is in contact with the outer peripheral surface of the adjacent rubber body in a loaded state in which a compressive force in a direction perpendicular to the surface of the metal plate is applied, and has a height lower than a gap between adjacent metal plates. A sound and vibration isolator having a joint.   The sound and vibration isolator according to claim 1, wherein the engaging portion is in contact with the entire outer peripheral surface of the rubber body in the loaded state.   The rubber body is sandwiched between a top surface of an engaging portion of one adjacent metal plate and a part of the other adjacent metal plate in the loaded state described above. 2. The sound and vibration isolator according to 2. The laminate has a through hole in a direction perpendicular to the surface of the metal plate,
Inserting the through hole, fastening the fixed base and the base of the machine of the forced vibration source across the laminate, and against the movement of the machine of the forced vibration source in a direction parallel to the surface of the metal plate 4. The sound and vibration isolator according to claim 1, further comprising a fastening member that generates frictional resistance.

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