JP5166742B2 - Damping gasket and manufacturing method thereof, manifold gasket - Google Patents

Description

  The present invention relates to a gasket having a damping function, and more particularly to a damping gasket in which an annular coil spring made of an elastomer and a piano wire or the like and an elastomer such as rubber are combined.

  Conventionally, there has been proposed a composite O-ring in which an elastomer is arranged as an outer layer material around an inner layer material in which a metal spring is made endless. Such a composite O-ring satisfies one functional material having performance capable of satisfying any one of the required characteristics required for the O-ring and any other required characteristics. It has been proposed from the viewpoint of compositing other functional materials having performance that can be achieved. Such a composite O-ring is disclosed in Patent Document 1, for example. Such a composite O-ring may be used as a gasket for parts of the engine and engine parts.

Japanese Utility Model Publication No. 63-119965

  For example, when the composite O-ring as described above is used by being mounted in an injector, the composite O-ring receives a repetitive load that causes a high surface pressure. Under such a condition in which a repeated load is applied, a large change may occur in the sealing function and vibration damping characteristics at a relatively early stage. Further, under high surface pressure, there are problems of falling, crushing, and twisting of the metal coil spring, and there is a problem that the joint part when the metal coil spring is formed into a ring shape may come off.

  The reason why such a problem occurs is considered as follows. Under the condition where a load is cyclically applied to the composite O-ring as described above, the elastic deformation of the elastomer starts first, and the deformation of the metal spring starts following this. Eventually, only the metal spring will be deformed. During this time, the elastomer easily reaches the plastic zone. Since the elastomer that has reached the plastic region cannot be restored to its original shape, the sealing function of the O-ring is reduced.

  Further, it is considered that the contribution of the frequency characteristics of the elastomer is large in the vibration damping effect of the composite O-ring, particularly in the high frequency region. Accordingly, the elastomer that has reached the plastic region and has been cured has a high dynamic spring constant, and there is a problem that the vibration damping effect in the high frequency region is lowered under an environment where high surface pressure is received.

  Such a problem also occurs when a composite O-ring is used in a gasoline engine or a diesel engine and is assembled under a high load in order to ensure a sealing function of combustion gas or an intake system.

  Then, this invention makes it a subject to provide the damping gasket which can obtain a favorable vibration damping characteristic with a high sealing function.

In order to solve such a problem, the vibration damping gasket of the present invention is a gasket in which a coil spring formed in an annular shape is embedded with an elastomer, and the elastomer is filled up to the inside of the coil spring, characterized by providing an exposed portion of the coil spring is exposed from the elastomer on at least one of upper and lower surfaces of the load direction of the gasket (claim 1). The present invention converts vibration applied to a gasket into heat energy with high responsiveness and high efficiency to reduce vibration and noise resulting therefrom. Specifically, a coil spring is used to obtain a low spring constant with respect to the surface pressure received by the gasket. Moreover, in order to accumulate thermal energy for as long as possible and increase the conversion efficiency of vibrational kinetic energy into thermal energy, the coil spring is embedded in an elastomer having low thermal conductivity. Thereby, propagation of vibration to the outside can be delayed or reduced. In addition, the coil exposed from the elastomer on the vibration transmitting surface, that is, at least one of the upper surface and the lower surface in the load direction of the gasket, in order to prevent deterioration of the damping function due to the settling of the gasket while ensuring high responsiveness The exposed portion of the spring is provided. In short, it is sufficient that the coil spring has a configuration capable of handling the load from the initial stage of receiving the load. In addition, although the damping gasket of this invention is mainly classified into an O ring, the shape is not limited to an O shape.

In such a vibration damping gasket, the cross-sectional shape of the coil spring and the initial cross-sectional shape before the load is applied can be not only a substantially perfect circle shape but also various shapes. For example, a heart shape (a shape having two protrusions at one end in the load direction of the gasket and one protrusion at the other end) , a rectangle, a trapezoid, an oval, an ellipse, a triangle, etc. 2 to 6). By setting the cross-sectional shape of the coil spring to such a shape, a high repulsive force of the vibration damping gasket can be obtained under a high surface pressure. When selecting the damping gasket, it is possible to select a cross-sectional shape capable of obtaining a desired repulsive force. Further, if the exposed portion has a convex shape, the load concentrates on the convex exposed portion, and the elasticity of the elastomer can be extracted by the concentrated load.

  Also, with such a vibration damping gasket, various measures can be taken to eliminate the problems of coil spring collapse, collapse, and twist, and to improve load resistance. For example, the coil spring in a crushed state can be embedded with the elastomer (claim 7). The exposed portion may be polished. (Claim 8) The coil spring can be a metal coil spring made of spring steel represented by stainless steel or piano wire. A wire rod for forming such a metal coil spring is subjected to a polishing process and is smoothly formed to improve the load resistance.

In the vibration damping gasket of the present invention, a plate body that abuts on the exposed portion may be provided on at least one of the upper surface and the lower surface in the load direction of the gasket. Such a plate can be configured to have a bent portion along the outer diameter shape of the coil spring. By assigning a load to such a plate body, it becomes possible to cope with a higher surface pressure. The plate body and the exposed portion can be welded or bonded together (claim 12). Moreover, it can also be set as the structure which made the said exposed part bite into the said board (Claim 13). When a plate body having a bent portion along the outer diameter shape is used, the plate body that receives a so-called angular type load is deformed so as to wind the coil spring, and thus the posture of the coil spring can be maintained. One plate can be disposed on each of the upper surface and the lower surface, or can be a single plate that contacts the exposed portions of the upper and lower surfaces. That is, it can also be set as the structure which covers an upper surface and a lower surface with one board.

  As described above, the coil spring which is a component of the present invention is formed in an annular shape. In order to form the coil spring in an annular shape, the winding diameter on one end side of one coil spring can be set to a small diameter, and the one end side can be overlapped with the other end side to connect both ends. A strong coil spring can be obtained by such joining.

  In the vibration damping gasket of the present invention, a structure in which the coil springs are provided in a double manner can be adopted. That is, the coil spring may be a first coil spring and a second coil spring. Here, the first coil spring and the second coil spring may be arranged such that the center lines of the respective coils coincide with each other (claim 16). Further, the coil spring may be configured as a first coil spring and a second coil spring arranged to be shifted to the inside of the first coil spring. The second coil spring may be arranged completely inside the first coil spring.

  Thus, when it is set as the structure provided with the 1st coil spring and the 2nd coil spring, it can be set as the structure which varied the winding direction of the said 1st coil spring, and the winding direction of the said 2nd coil spring. (Claim 18). By adopting such a configuration, it is possible to cancel the deformation deviation of the coil. As a result, the posture of the coil spring can be stabilized, and variations in vibration damping characteristics can be suppressed.

  Moreover, when it is set as the structure provided with the 1st coil spring and the 2nd coil spring, it can be set as the structure which connected the said 1st coil spring and said 2nd coil spring with the metal plate (Claim 19). For example, by forming the cross section into an S shape, the first coil spring and the second coil spring can be connected using a plate body in which two concave portions are formed in the cross section. That is, the first coil spring and the second coil spring can be respectively installed in the groove formed on the upper surface side and the groove formed on the lower surface side by forming the cross section into an S shape.

  Further, the first coil spring and the second coil spring are shifted in the load direction, arranged so that step portions are formed on the upper surface and the lower surface in the load direction, and the first coil spring and the second coil spring are disposed on the upper surface and the lower surface in the load direction. A plate body having a shape along the surface shape of the coil spring and the second coil spring is disposed, and another plate body is disposed on the surface of the plate body at a portion corresponding to the stepped portion. (Claim 20). A high repulsive force can be obtained by shifting the two coil springs in the load direction and providing a stepped portion. With such a configuration, it is possible to restrain the deformation of the coil spring whose direction is 90 ° from the load direction.

  Furthermore, the first coil spring and the second spring may be included in a metal plate (claim 21). For example, it can be set as the form included with one metal plate. By setting it as such a structure, the effect similar to the structure which has arrange | positioned the board to the upper and lower surfaces can be acquired.

In the vibration damping gasket as described above, a seal lip can be formed around the coil spring by the elastomer (claim 22). By forming the seal lip around the coil spring, it is possible to improve the sealing performance when mounting to the mounting object. Further, since the amount of the elastomer having a low thermal conductivity is increased, the heat storage effect is enhanced and the vibration is also attenuated. Such a seal lip can be configured to include an expansion portion that becomes a crushing margin when mounted on the mounting target (claim 23). Furthermore, it can also be set as the structure which provided the extended plate which spreads toward at least one of the inner peripheral side of the said coil spring shape | molded cyclically | annularly, and the outer peripheral side, and shape | molded the said seal lip around the said extended plate ( Claim 24). The sealing function at the outer peripheral end face and inner peripheral end face of the gasket can be improved. Moreover, it can be set as the structure which provided the unevenness | corrugation in at least one of the upper surface and lower surface of the load direction of the said seal lip.

  In the vibration damping gasket as described above, it is desirable that the coil is filled with the elastomer even in the coil spring (claim 26). Thereby, the heat storage capacity of the gasket can be increased.

  Thus, when it is set as the structure filled with the elastomer also in the inside of a coil, it can be set as the structure which made the hardness of the elastomer filled into the said coil lower than the hardness of the elastomer outside the said coil (Claim 27). ). In the present invention, various measures are taken to improve the attenuation characteristics in the high frequency range, but it is assumed that the attenuation characteristics in the low frequency range deteriorate in exchange for the improvement in the attenuation characteristics in the high frequency range. The purpose is to improve the low-frequency damping characteristics of the vibration by exhibiting the elasticity of the elastomer and delaying the time response.

  Such a vibration-damping gasket may be configured to include a wire rod that passes through the coil of the coil spring (Claim 28), or may include a wire rod arranged along the coil spring. (Claim 29). Thereby, the plastic deformation of the coil spring when an overload is applied can be suppressed.

  Further, the plate body in such a vibration damping gasket may be plated (claim 30). Sealing performance can be improved by performing plating treatment or coating treatment. Further, such a vibration damping gasket can be provided with a protrusion on its inner peripheral surface (claim 31).

  Further, the manifold gasket of the present invention can be configured by mounting any one of the vibration-damping gaskets of the present invention around a fluid flow hole provided in the substrate (claim 32).

Next, the manufacturing method of the vibration damping gasket of the present invention includes a step of forming a coil spring in an annular shape, a step of degreasing, applying an adhesive and drying the annularly formed coil spring, and setting the coil spring in a mold. And supplying the unvulcanized rubber to the mold , filling the coil spring into the unvulcanized rubber, and performing press vulcanization on the unvulcanized rubber. (Claim 33). Through such a process, it is possible to manufacture a vibration damping gasket in which a coil spring is embedded with an elastomer so that a part thereof is exposed. In this specification, unvulcanized rubber includes various substances that become elastomers by press vulcanization.

The vibration damping gasket of the present invention includes a combination of a coil spring embedded in an elastomer and an exterior member such as a plate. For this reason, the invention of the manufacturing method of the present invention includes a step of molding an exterior member, a step of combining the exterior member with a coil spring, a coil spring combined with the exterior member in a mold, or a single coil spring as a mold. It includes the steps of setting and supplying unvulcanized rubber, filling the unvulcanized rubber into the coil spring, and performing press vulcanization. In addition, steps such as degreasing, adhesive application, and drying, which are preparations for performing press vulcanization, are also included. The manufacturing method of the vibration damping gasket of the present invention is characterized by appropriately combining these steps (claims 34 to 38).

  In such a manufacturing method, after the press vulcanization, polishing treatment or blasting treatment of the upper and lower surfaces can be performed (claim 39). Thereby, a coil spring and an exterior member can be fully exposed from an elastomer. The depth of the mold is preferably shallower than the height of the coil spring set in the mold or a coil spring combined with an exterior member. The vibration damping gasket of the present invention has a configuration in which the upper and lower surfaces in the load direction are exposed from the elastomer, but the depth of the mold is shallower than the height of the coil spring and the upper mold is used as the coil spring and the like. If the unvulcanized rubber is supplied by abutting and compressing, the elastomer does not go around the upper and lower surfaces in the load direction of the damping gasket, and can be exposed.

According to the present invention, the exposed portion of the coil spring exposed from the elastomer is provided on at least one of the upper surface and the lower surface in the load direction of the gasket in which the coil spring formed in an annular shape is embedded with an elastomer. The load resistance of the gasket is improved, and the vibration damping function in the high frequency region can be improved under a high surface pressure environment. Further, by improving the load resistance, it is possible to avoid the plastic deformation of the elastomer and improve the sealing function.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  First, the configuration of the vibration damping gasket of the present invention will be described with reference to FIG. Fig.1 (a) is the top view which fractured | ruptured a part of the damping gasket 1 of this invention which embedded the metal coil with the elastomer. Moreover, FIG.1 (b) is the sectional view on the AA line in (a). Appearing in FIG. 1A is an upper surface 1a in the load direction. The damping gasket 1 has a configuration in which an annularly formed coil spring 2 is embedded with an elastomer 3. Furthermore, the exposed portion 2a of the coil spring 2 exposed from the elastomer 3 is provided on the upper surface 1a and the lower surface 1b in the load direction. As shown in FIG. 1B, the coil spring 2 has a perfect circular cross-sectional shape. The material of the coil spring 2 can be selected from spring steel such as stainless steel and piano wire. In this embodiment, SUS304 material is selected. The coil spring 2 is formed into an annular shape by combining both end portions 9a and 9b of the linear coil spring 9 shown in FIG. The linear coil spring 9 has a winding diameter on one end side 9a smaller than that of other portions. The one end side 9a and the other end side 9b are combined with each other as shown in FIG. Further, spot welding is applied to the joint ends. In addition, it can replace with this spot welding and can also be set as resin joining.

  The coil spring 2 configured as described above is embedded in the elastomer 3 so that the exposed portion 2a faces the upper surface 1a and the lower surface 1b in the load direction. The elastomer 3 is a material selected as a main raw material from fluorine rubber, nitrile rubber, hydrogenated nitrile rubber, fluorocarbon silicone rubber, etc., as appropriate, and a filler such as carbon black, silica, charcoal calcelite, and the like. An antioxidant, a processing aid, and a vulcanizing agent suitable for other blends are blended. The elastomer 3 is filled up to the inside of the coil spring 2 as shown in FIG.

  The vibration damping gasket 1 configured as described above is installed in the mounting hole 4a provided in the cylinder head 4 when the injector 5 is mounted on the cylinder head 4 of the diesel engine as shown in FIG. The vibration damping gasket 1 installed in the mounting hole 4a is exposed to repeated high surface pressures during operation of the diesel engine.

  However, since the damping gasket 1 of the present invention has succeeded in suppressing the viscoelasticity to a low level, a small dynamic spring constant can be maintained even in an environment where the surface pressure is repeatedly applied. Therefore, even in such an environment, the vibration damping effect is great. Further, since the vibration damping gasket 1 of the present invention has a small amount of deformation of the elastomer 3 when subjected to a high surface pressure, the amount of change in the dynamic spring constant due to a change in the surface pressure is small, and a stable sealing function can be maintained. it can.

  Such a damping gasket 1 has a particularly good transfer function damping effect in a high frequency range. This is considered due to the fact that the dynamic spring constant of the damping gasket 1 is low as described above. On the other hand, there is a concern that the transfer function in the low frequency range becomes higher. This is considered due to the fact that the heat energy absorbed in the high frequency range cannot be released. For such a phenomenon in the low frequency range, that is, a phenomenon in which the transfer function is increased, the absorbed energy per unit time of the damping gasket 1 is apparently lowered by, for example, reducing the viscoelasticity of the elastomer 3. It is thought that it can be solved by.

  Next, various variations of the vibration damping gasket will be described with reference to FIG. 4A to 4E are cross-sectional views of the vibration damping gaskets 11 to 15, respectively. The place made into the cross section corresponds to the place shown in FIG. 1B for the vibration damping gasket 1 of the first embodiment. The difference between the damping gaskets 11 to 15 and the damping gasket 1 of the first embodiment is the cross-sectional shape of the coil spring.

  The cross-sectional shape of the coil spring 16 of the damping gasket 11 shown in FIG. Since the coil spring 16 has an elliptical cross-sectional shape, the rigidity of the coil spring 16 is increased, and the load resistance of the vibration damping gasket 11 is improved. Since the coil spring 16 has an elliptical cross-sectional shape, a reaction force acting in the direction of 90 ° with the direction of the load is applied to the load from above indicated by the arrow 21 in FIG. Can be suppressed. At the same time, it is possible to increase a reaction force that is in the same phase as the load direction as indicated by arrows 22 to 25, that is, the direction indicated by arrow 21. By having such a load distribution, it is possible to obtain a better damping effect and a transfer function damping effect than the damping gasket 1 of the first embodiment. Note that the cross-sectional shape of the coil spring 16 may be oval.

  The cross-sectional shape of the coil spring 17 of the vibration damping gasket 12 shown in FIG. 4B is a heart shape. Since the coil spring 17 has a heart shape in cross section, it can disperse the load and can suppress deformation in the direction of 90 ° with the direction of the load. That is, the load can be received at two locations as indicated by arrows 26 and 27, and the reaction force as indicated by arrows 28 and 29 is generated, so that deformation in the direction of 90 ° with the direction of the load is suppressed. be able to. Thereby, a high repulsive force can be generated and a high attenuation effect in a high frequency range can be obtained.

  The cross-sectional shape of the coil spring 18 of the vibration damping gasket 13 shown in FIG. 4C is a rectangle. Since the coil spring 18 has a rectangular cross-sectional shape, it is possible to disperse the load, and to suppress deformation in a direction that makes 90 ° with the direction of the load. That is, reaction force as indicated by arrows 31 and 32 is generated with respect to the load as indicated by arrow 30, so that deformation in a direction that makes 90 ° with the direction of the load can be suppressed. Thereby, a high repulsive force can be generated and a high attenuation effect in a high frequency range can be obtained. Further, since the exposed portion 18a on the lower surface side is linear, stability at the time of mounting is high. That is, the coil spring 18 is unlikely to fall down and can maintain a stable posture.

  The cross-sectional shape of the coil spring 19 of the damping gasket 14 shown in FIG. 4D is a triangle. Since the coil spring 19 has a triangular cross-sectional shape, the exposed portion 19a has a convex shape. When the exposed portion 19a has a convex shape as described above, a load as indicated by an arrow 33 is concentrated and applied to the convex exposed portion 19a of the coil spring 19. Thus, when the load is concentrated and applied to a narrow portion, the viscoelasticity of the elastomer 3 inside the coil spring 19 can be sufficiently extracted. By utilizing the viscoelasticity of the elastomer 3, good vibration damping characteristics in a low frequency range can be obtained. Although the vibration damping gasket 1 of Example 1 has a high vibration damping effect in a high frequency region, there is a risk that the vibration damping effect in a low frequency region may be reduced. Therefore, by using the coil spring 19 having such a triangular cross-sectional shape, a time response delay of energy accumulation in the elastomer 3 is caused, and the vibration damping characteristic in the low frequency region is improved by securing a heat storage amount. . By improving the vibration damping characteristics in this way, it is possible to compensate for the decrease in the vibration damping effect in the low frequency range.

  Further, since the cross-sectional shape is triangular, the area on the lower surface side of the vibration damping gasket 14 is increased. This also contributes to the improvement of the attenuation characteristics in the low frequency range.

  Further, in this embodiment, the hardness of the elastomer 3 filled in the coil of the coil spring 19 is set lower than the hardness of the elastomer 3 outside the coil. By setting it as such a structure, the viscoelasticity of the elastomer 3 can further be pulled out. Even with such a configuration, it is possible to improve the attenuation characteristics in the low frequency range.

  The cross-sectional shape of the coil spring 20 of the vibration damping gasket 15 shown in FIG. 4 (e) is a trapezoid. The coil spring 18 has a trapezoidal cross-sectional shape, and thus has similar properties to the damping gasket 18 having a rectangular cross-sectional shape and the damping gasket 19 having a triangular cross-sectional shape. Therefore, by making the cross-sectional shape trapezoid in this way, a high attenuation effect in the high frequency region and the low frequency region can be obtained.

  Next, a third embodiment of the present invention will be described with reference to FIG. In the damping gasket 34 shown in FIG. 5, the coil spring 35 in a crushed state is embedded with the elastomer 3. The coil spring 35 may be crushed before embedding with the elastomer 3 and installed in the elastomer 3 in that state. Alternatively, the coil spring 35 may be crushed by being installed in the elastomer 3 before being crushed and then applying a force from the outside of the elastomer 3. Even if the coil spring 35 is embedded in the elastomer 3 in a crushed state, the coil spring 35 includes an exposed portion 35a as shown in the drawing.

  Thus, by crushing the coil spring 35 and embedding it in the elastomer 3, the load resistance of the damping gasket 34 is improved as compared with the case where the coil spring is not crushed. By improving the load resistance, a high repulsive force can be generated to obtain a high damping effect in the high frequency range.

  Next, Embodiment 4 of the present invention will be described with reference to FIG. In the damping gasket 36 shown in FIG. 6, the coil spring 37 is embedded in the elastomer 3 so that the exposed portion 37 a faces the upper and lower surfaces in the load direction. Such an exposed portion 37a is polished, and the upper and lower surfaces in the load direction are in a smooth state as shown in FIG. By performing the polishing process on the exposed portion 37a in this manner, the coil spring 37 can be prevented from falling, twisting, and being crushed, and the load resistance can be improved. By improving the load resistance, a high repulsive force can be generated to obtain a high damping effect in the high frequency range.

  Next, a fifth embodiment of the present invention will be described with reference to FIG. In the damping gasket 40 shown in FIG. 7A, the coil spring 41 is embedded with the elastomer 3 so that the exposed portion 41a faces the upper and lower surfaces in the load direction. Such an exposed portion 41a is subjected to a polishing process, and the upper surface and the lower surface in the load direction are in a smooth state as shown. The configuration up to here is the same as that of the vibration damping gasket 35 of the fourth embodiment. The damping gasket 40 of the present embodiment is different from the damping gasket 35 of Embodiment 4 in that metal plates 42 that abut against the exposed portions 41a are provided on the upper and lower surfaces in the load direction, respectively. The metal plate 42 corresponds to a plate body in the present invention. The metal plate 42 and the exposed portion 41a are bonded. The vibration damping gasket 40 having such a configuration can prevent the coil spring 36 from falling, twisting, and collapsing, and can improve the load resistance. By improving the load resistance, a high repulsive force can be generated to obtain a high damping effect in the high frequency range.

  Moreover, when it is set as the structure provided with the metal plate which contact | abuts an exposed part on the upper surface and lower surface of a load direction, it can also be set as the structure like the damping gasket 43 shown in FIG.7 (b). In the damping gasket 43, the coil spring 44 is embedded in the elastomer 3 so that the exposed portion 44a faces the upper and lower surfaces in the load direction. Here, the exposed portion 44a differs from the exposed portion 42a in the damping gasket 40 shown in FIG. For this reason, the exposed portion 44a maintains a convex shape. The metal plate 45 is provided on the upper and lower surfaces of the damping gasket 43 in the load direction, and the exposed portion 44a bites into the metal plate 45 as shown in FIG.

The damping gasket 43 provided with the metal plate 45 in this way can also prevent the coil spring 44 from falling, twisting and crushing and improving the load resistance, similarly to the damping gasket 40 shown in FIG. it can. By improving the load resistance, a high repulsive force can be generated to obtain a high damping effect in the high frequency range.
In addition, although the cross-sectional shape of the coil springs 41 and 44 is circular, another shape may be sufficient.

  Next, Embodiment 6 of the present invention will be described with reference to FIG. The example included in Example 6 is a modification of the vibration damping gasket provided with plate bodies (metal plates) on the upper and lower surfaces in the load direction.

  First, in the damping gasket 50 shown in FIG. 8A, the coil spring 51 is embedded in the elastomer 3 so that the exposed portion 51a faces the upper and lower surfaces in the load direction. Here, the exposed portion 51a maintains a convex shape in the same manner as the vibration damping gasket 43 shown in FIG. The vibration damping gasket 50 includes a metal plate 52 that abuts against the upper and lower surfaces in the load direction. Here, unlike the vibration damping gasket 43 shown in FIG. 7B, the metal plate 52 is a single plate and is mounted so as to enclose the coil spring 51. The exposed portion 51a bites into the metal plate 52.

  The metal plate 52 is formed into a shape having spring characteristics. For this reason, when the repulsive force of the metal plate 52 is combined with the repulsive force of the coil spring 51, the load resistance that can be exerted by the damping gasket 50 is improved, and the repulsive force is also improved. Thereby, a high attenuation effect in a high frequency region can be obtained. Moreover, with such a configuration, there is little settling and durability can be improved.

  Next, the damping gasket 55 shown in FIG. In the damping gasket 55, the coil spring 56 is embedded in the elastomer 3 so that the exposed portion 56a faces the upper and lower surfaces in the load direction. Further, the vibration damping gasket 55 includes metal plates 57 that are in contact with the exposed portions 56a on the upper and lower surfaces in the load direction, respectively, and the metal plates 57 correspond to the plate body in the present invention. The metal plate 57 has a bent portion 57 a along the outer diameter shape of the coil spring 56. The damping gasket 55 having such a configuration may be referred to as an angular type. When a load is applied to such an angular type damping gasket 55, the metal plate 57 is deformed along the outer peripheral shape of the coil spring 56. In the case of the arrangement shown in FIG. 8B, the upper metal plate 57 is deformed so as to wind the coil spring 56 inward and the lower metal plate 57 outward.

  With such a configuration, the stability when mounted on the mounting object is high, and good vibration damping characteristics can be stably ensured for a long period of time.

  Next, the vibration damping gasket 60 shown in FIG. In the damping gasket 60, the coil spring 61 is embedded with the elastomer 3 so that the exposed portion 61a faces the upper and lower surfaces in the load direction. Further, the vibration damping gasket 60 includes a metal plate 62 that contacts the upper and lower surfaces in the load direction. Here, the metal plate 62 is a single plate and is mounted so as to enclose the coil spring 61. Further, the metal plate 62 has a bent portion 62 a along the outer diameter shape of the coil spring 61. The vibration damping gasket 60 having such a configuration also has improved load resistance and repulsive force. Thereby, a high attenuation effect in a high frequency region can be obtained. Moreover, with such a configuration, there is little settling and durability can be improved. Further, the stability when mounted on the mounting object is high, and good vibration damping characteristics can be secured stably for a long period of time.

  Next, the vibration damping gasket 70 shown in FIG. The damping gasket 70 has a first coil spring 711 and a second coil spring 712. As for the 1st coil spring 711, as shown to Fig.9 (a), the winding direction is left-handed. The winding direction of one second coil spring 712 is right-handed as shown in FIG. The first coil spring 711 and the second coil spring 712 are arranged so as to be shifted to the inside of the first coil spring 711 as shown in FIGS. 8D and 9C. Has been. At this time, both are in a meshed state.

  The first coil spring 711 and the second coil spring 712 arranged in this way are embedded in the elastomer 3 so that the exposed portion 711a and the exposed portion 712a face the upper and lower surfaces in the load direction. Furthermore, the vibration damping gasket 70 includes a metal plate 72 that abuts against the upper and lower surfaces in the load direction. Here, the metal plate 72 is a single plate body and is mounted so as to enclose the first coil spring 711 and the second coil spring 712. The exposed portions 711a and 712a bite into the metal plate 72.

In the vibration damping gasket 70 having such a configuration, the deformation deviation of the first coil spring 711 and the deformation deviation of the second coil spring 712 cancel each other. For this reason, the attitude | position of the 1st coil spring 711 and the 2nd coil spring 712 can be maintained in the stable state. As a result, variations in vibration damping characteristics can be suppressed. Moreover, a high repulsive force can be obtained by providing two coil springs. Furthermore, by mounting the metal plate 72, the repulsive force of the metal plate 72 is combined with the repulsive force of the first coil spring 711 and the second coil spring 712, and the load resistance that the damping gasket 70 can exert is increased. Improves repulsive force. Thereby, a high attenuation effect in a high frequency region can be obtained. Moreover, with such a configuration, there is little settling and durability can be improved.
Note that the winding direction of the coil spring may be switched between the first coil spring 711 and the second coil spring 712.

  Next, the vibration damping gasket 75 shown in FIG. The second coil spring 762 constituting the vibration damping gasket 75 is arranged so as not to overlap with each other inside the first coil spring 762 and is arranged to be shifted in the load direction. The first coil spring 761 and the second coil spring 762 arranged in this way are embedded in the elastomer 3 so that the exposed portion 761a and the exposed portion 762a face the upper and lower surfaces in the load direction. Thereby, the step part 77 is shape | molded by the upper surface and lower surface of a load direction. The damping gasket 75 includes a metal plate 78 having a shape along the surface shape of the first coil spring 761 and the second coil spring 762 on the upper and lower surfaces in the load direction. Furthermore, another metal plate 79 is provided on the surface of the metal plate 78 corresponding to the stepped portion 77. This metal plate is for smoothing the upper and lower surfaces in the load direction.

  In such a damping gasket 75, the metal plate 78 having a shape along the surface shape of the first coil spring 761 and the second coil spring 762 restrains the deformation of the damping gasket 75 in the direction of 90 ° with respect to the load direction. . For this reason, a repulsive force can be generated in a stable state. In addition to the two coil springs, the first coil spring 761 and the second coil spring 762 are displaced as described above and the stepped portion 77 is provided, so that a further high repulsive force is obtained.

  Next, a seventh embodiment of the present invention will be described with reference to FIGS. The damping gaskets 80 and 85 shown in FIGS. 10A and 10B are each provided with two coil springs.

  A damping gasket 80 shown in FIG. 10A includes a first coil spring 811 and a second coil spring 812, both of which are arranged with the center lines of the respective coils aligned. The first coil spring 811 and the second coil spring 812 arranged in this way are embedded in the elastomer 3. The damping gasket 80 having such a shape is referred to as “double”.

  On the other hand, the vibration damping gasket 85 shown in FIG. 10B includes a first coil spring 861 and a second coil spring 862, and the second coil spring 862 is disposed inside the first coil spring 861. . The first coil spring 861 and the second coil spring 862 arranged in this way are embedded in the elastomer 3. Further, the vibration damping gasket 85 includes metal plates 87 on the upper and lower surfaces in the load direction. The damping gasket 85 having such a shape is referred to as “single parallel”.

  The load limit characteristics of these elastic regions are shown in the graph of FIG. When the vibration damping gasket enters the plastic region, the sealing function and the vibration damping function deteriorate. Therefore, the graph in FIG. 11 is intended to compare the load limit in the elastic region where the damping gasket does not enter the plastic region. In the graph, what is represented as single is the vibration damping gasket 1 of Example 1 shown in FIG. The vibration damping gasket shown in the graph of FIG. 11 has the same coil diameter for coil springs for comparison. Moreover, as for the wire material of a coil spring, the thing of SUS304 material and a piano wire is tested only for single, and others are tested using SUS304 material.

  As apparent from FIG. 11, when the shape of the damping gasket is single, the load limit in the elastic region is higher when the coil spring is made of piano wire than when the coil spring wire is made of SUS304. That is, a higher load limit can be obtained when a piano wire is used as the wire than SUS304.

  The SUS304 material is used, and the damping gasket 80 (double) shown in FIG. 10A has a higher load limit than a single damping gasket using a coil spring wire as a piano wire. Further, the SUS304 material is used, and the vibration damping gasket 85 shown in FIG. 10B (single parallel) shows a higher load limit.

  Thus, the load limit, that is, the load resistance, can be improved by using a plurality of coil springs or changing the arrangement. The repulsive force is improved by improving the load resistance. Thereby, a high attenuation effect in a high frequency region can be obtained.

  Next, an eighth embodiment of the present invention will be described with reference to FIG. A damping gasket 90 shown in FIG. 12 includes a first coil spring 911 and a second coil spring 912, and the second coil spring 912 is disposed inside the first coil spring 911. The first coil spring 911 and the second coil spring 912 arranged in this way are connected by an S-shaped metal plate 93 as shown in FIG. The first coil spring 911 and the second coil spring 912 connected by the metal plate 93 are embedded in the elastomer 3.

  The damping gasket 90 configured as described above has improved load resistance by including two coil springs. In addition, the load resistance is improved due to the spring effect of the metal plate 93 bent into an S shape. Furthermore, since the first coil spring 911 and the second coil spring 912 are restrained by the metal plate 93, the first coil spring 911 and the second coil spring 912 can be prevented from falling, twisting, and being crushed, and the load resistance can be improved.

  Next, Embodiment 9 of the present invention will be described with reference to FIG. In each of the damping gaskets 100, 110, 120, 130, and 140 shown in FIGS. 13A to 13E, a seal lip is formed around the coil spring by an elastomer. Hereinafter, the configuration will be described individually.

  First, the vibration damping gasket 100 shown in FIG. The vibration damping gasket 100 includes a coil spring 101 embedded with the elastomer 3. The damping gasket 100 includes an extending plate 102 that abuts on the lower surface side of the coil spring 101 and expands toward the inner peripheral side and the outer peripheral side of the coil spring 101. Furthermore, an extension portion 103 made of an elastomer and extending on the upper surface side and the lower surface side in the load direction is formed on the inner peripheral end and the outer peripheral end of the extension plate 102. A seal lip is formed from the elastomer 3 covering the coil spring 101 to the elastomer 104 arranged along the extending plate 102 and further to the extension portion 103. The extension plate 102 plays a role of reinforcing and retaining the shape of the seal lip. The expansion part 103 becomes a crushing margin when the vibration damping gasket 100 is attached to the attachment object. That is, when the vibration damping gasket 100 is mounted on the mounting object, the expansion portion 103 is crushed and fills the groove portion 105 formed between the expansion portion 103 and the coil spring 101. Thereby, the sealing function is improved.

  Next, the vibration damping gasket 110 shown in FIG. The vibration damping gasket 110 includes a coil spring 111. Further, a metal plate 112 having a C-shaped cross section is provided so as to be in close contact with the periphery of the coil spring 111. The coil spring 111 integrated with the metal plate 112 in this way is embedded in the elastomer 3. The elastomer 3 is extended to the outer peripheral side of the coil spring 111 and is formed with an extended portion 113 that extends to the upper surface side and the lower surface side in the load direction. The extended portion 113 forms a seal lip. The expansion part 113 becomes a crushing margin when the vibration damping gasket 110 is attached to the attachment object. That is, when the vibration damping gasket 110 is mounted on the mounting object, the expansion portion 113 is crushed and fills the groove 114 formed between the expansion portion 113 and the coil spring 111. Thereby, the sealing function is improved.

  Next, the vibration damping gasket 120 shown in FIG. The vibration damping gasket 120 includes a coil spring 121. The coil spring 121 is embedded with the elastomer 3. The elastomer 3 is extended to the outer peripheral side of the coil spring 121 and is formed with an extension portion 123 that extends to the upper surface side and the lower surface side in the load direction. The extension 123 forms a seal lip. The expansion part 123 becomes a crushing margin when the damping gasket 120 is mounted on the mounting target. That is, when the damping gasket 120 is mounted on the mounting object, the expansion portion 123 is crushed and fills the groove portion 124 formed between the expansion portion 123 and the coil spring 121. Thereby, the sealing function is improved.

  Next, the damping gasket 130 shown in FIG. 13 (d) will be described. The damping gasket 130 includes a coil spring 131. In addition, an extension plate 132 that abuts on the lower surface side of the coil spring 131 and extends toward the inner peripheral side and the outer peripheral side of the coil spring 131 is provided. The extended plate 132 is formed by bending the inner peripheral end on the lower side in the load direction and bending the outer peripheral end on the upper side in the load direction. Such a coil spring 131 and the extended plate 132 are embedded in the elastomer 3. The elastomer 3 includes protrusion-like expansion portions 133 on the inner peripheral wall and the outer peripheral wall. The expansion part 133 corresponds to a seal lip, and contributes to an improvement in the sealing function when the vibration damping gasket 130 is attached to the attachment object.

  Next, the damping gasket 140 shown in FIG. The damping gasket 140 includes a coil spring 141. In addition, a metal plate 142 having a C-shaped cross section is provided in close contact with the periphery of the coil spring 141. The coil spring 141 integrated with the metal plate 142 in this way is embedded in the elastomer 3. As for the elastomer 3, the unevenness | corrugation 143 is shape | molded by the upper surface side and lower surface side of a load direction. The unevenness 143 expands when the vibration damping gasket 140 is attached to the attachment object, and contributes to the improvement of the sealing function.

  Next, a tenth embodiment of the present invention will be described with reference to FIGS. FIG. 14 is a plan view of the manifold gasket 150 of the present invention, and FIG. 15 is a cross-sectional view taken along line AA in FIG.

  The manifold gasket 150 is configured by mounting the damping gasket 1 described in the first embodiment on a substrate 151 made of a thin metal plate. The substrate 151 includes a first substrate 151a and a second substrate 151b. A fluid circulation hole 152 is formed in the first substrate 151a, and a fluid circulation hole 153 is also formed in the second substrate 151b. The damping gasket 1 is mounted around the fluid circulation hole 152 formed in the first substrate 151a. The manifold gasket 150 configured as described above is used in a state where the first substrate 151a and the second substrate 151b are overlapped.

  The mounting of the damping gasket 1 on the first substrate 151a in such a manifold gasket 150 will be described with reference to FIG. First, as shown in FIG. 15A, the fluid circulation holes 152 are formed in the first substrate 151a by punching. Following this, the punched plate is subjected to a drawing process to form the gasket mounting portion 154. The damping gasket 1 is fitted into the gasket mounting portion 154. Thereafter, as shown in FIG. 15B, the damping gasket 1 is fixed by performing grommet molding by bending. With the above process, the mounting of the damping gasket 1 around the fluid circulation hole 152 is completed.

  As described above, according to the described manifold gasket 150, a high vibration damping function and a sealing function in the manifold can be obtained.

Next, an eleventh embodiment of the present invention will be described with reference to FIG.
Each of the damping gaskets 170 and 180 shown in FIGS. 17A and 17B includes a solid wire 173 and 183.

  A damping gasket 170 shown in FIG. 17A includes a first coil spring 1711 and a second coil spring 1712 disposed inside the first coil spring 1711. Further, a wire 173 is inserted into the coil of the second coil spring 1712 and disposed. The first coil spring 1711, the second coil spring 1712, and the wire 173 arranged in this way are embedded in the elastomer 3. In addition, metal plates 172 are disposed on the upper and lower surfaces of the first coil spring 1711 and the second coil spring 1712 in the load direction.

  On the other hand, the damping gasket 180 shown in FIG. 17B has a coil spring 181 and a wire 183 arranged along the inner periphery of the coil spring 181. The first coil spring 181 and the wire 183 arranged in this way are embedded in the elastomer 3. In addition, metal plates 182 are disposed on the upper and lower surfaces in the load direction of the coil spring 181 and the wire 183.

  Such damping gaskets 170 and 180 can avoid the plastic deformation of the coil spring because the wire rods 173 and 183 are responsible for the load when an overload is applied.

  In addition, arrangement | positioning of a wire is not restricted to these arrangement | positioning, For example, it can arrange | position by inserting in the 1st coil spring 1711, or it can arrange | position along the outer peripheral side of the coil spring 181.

Next, a twelfth embodiment of the present invention will be described with reference to FIG.
The damping gasket 190 of the twelfth embodiment differs from the damping gasket 1 of the first embodiment in that the damping gasket 190 of the twelfth embodiment includes three protrusions 190a on the inner peripheral surface 190b. By providing such a protrusion 190a, it is possible to prevent the vibration-damping gasket 190 from falling off when it is mounted on the mounting target. It also contributes to positioning for accurate centering during mounting.
Three or more protrusions 190a may be disposed so that the vibration damping gasket 190 can be stably attached to the attachment object.
Such protrusions can be provided in any vibration damping gasket of the present invention.

  Next, the manufacturing method of the damping gasket 194 of this invention is demonstrated, referring FIG. FIG. 19 is a process diagram for explaining a method of manufacturing the vibration damping gasket, and the coil spring and the mold are partially shown in a cross-section.

  First, an annular coil spring 191 is prepared. The coil spring before being formed into an annular shape has a linear shape as shown in FIG. 2, and the winding diameter at one end is smaller than the winding diameter at the other part. Such a coil spring is made of SUS304 material. The one end side having a small winding diameter and the other end side are alternately meshed with each other to form an annular shape. Thereafter, heat treatment is performed as a post-treatment.

  The coil spring materials are hard steel wire, piano wire, carbon steel oil temper wire, Cr-V steel oil temper wire, Si-Mn steel oil temper wire, stainless steel wire, copper and copper alloy wire, beryllium wire, It can be suitably selected from phosphor bronze, white wire, and the like. Moreover, the said heat processing can perform quenching tempering, induction hardening, carburizing and nitriding, and a heat processing as needed. Furthermore, low temperature annealing and shot peening can be performed as post-processing. These post-treatments may be performed before forming into an annular shape in order to adjust the strength of the coil spring. In addition, after alternately engaging the one end and the other end of the coil spring, spot welding, resin bonding, or caulking may be performed in order to strengthen the connection. The coil spring 191 formed in an annular shape has a gap between the wires on the outer peripheral side, and is smoothly filled with unvulcanized rubber performed in a later step.

  Next, the coil spring 191 formed in an annular shape is degreased, coated with an adhesive, and dried. Degreasing is a process for securing adhesive strength, and solvent degreasing using methyl ethyl ketone as a solvent is performed. Thereafter, a phenol-based adhesive is applied to the coil spring 191. After applying the adhesive, it is dried.

  The degreasing can be appropriately selected from treatments such as alkali degreasing, surfactant degreasing, electrolytic degreasing, ultrasonic degreasing, and rotary polishing degreasing according to the material of the coil spring 191 and other conditions. Similarly, adhesives such as epoxy and silane can also be selected. Further, in the drying process, a drying method (temperature RT to 250 ° C., time 1 to 60 minutes) suitable for the type of the selected adhesive is selected.

  After degreasing, applying an adhesive, and drying the coil spring 191, the coil spring 191 is set on the mold 192, and the unvulcanized rubber 193 is supplied into the mold 192. The depth of the mold 192 is shallower than the height of the coil spring 191, and compression molding is performed while the upper mold 192 a is in contact with the upper part of the coil spring 191. By performing such compression molding, it is possible to avoid the unvulcanized rubber 193 from wrapping around the upper and lower surfaces of the coil spring 191 in the load direction. That is, the upper and lower surfaces of the coil spring can be exposed from the elastomer after molding.

  Here, as the unvulcanized rubber 193, fluoro rubber (FKM) is selected. The unvulcanized rubber 193 is formed into a sheet by roll molding, and is disposed between the upper mold 192a and the coil spring 191 as shown in FIG. 19, and the mold 192 is depressed by pushing down the upper mold 192a. Supplied in. The unvulcanized rubber 193 flows in the mold 192 by the clamping pressure of the mold 192 and is supplied and filled into the coil spring 191 through the space between the wires.

  After the mold 192 is closed, rubber vulcanization is performed while applying pressure, and the coil spring 191 in a state where the vulcanization is completed is taken out, whereby the vibration damping gasket 194 of the present invention can be obtained. However, in this embodiment, blasting is performed on the damping gasket 194, which is a molded product taken out from the mold 192, in order to ensure the exposure of the coil springs 191 on the upper and lower surfaces in the load direction. For this blasting process, wet blasting or drive lasting can be selected as appropriate. Further, the coil spring 191 may be exposed by polishing using a polishing machine. By these treatments, the upper and lower surfaces of the molded product may be molded smoothly.

  The unvulcanized rubber 193 is made of natural rubber, butanediene styrene rubber (SBR), butadiene rubber (BR), acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), butyl rubber (IIR), ethylene propylene rubber ( EPDM), isoprene rubber (IR), silicone rubber (VMQ), fluorosilicone rubber (FVMQ), water-added acrylonitrile butadiene rubber (H-NBR), acrylic rubber (ACM), ethylene acrylic rubber (AEM), liquefied silicone, etc. It can be suitably selected from the inside. Further, the components can be adjusted so that the hardness after vulcanization is 40 ° to 90 °. Moreover, vulcanization | cure processing can be suitably set between temperature 120 degreeC-250 degreeC and time 10 second-60 minutes according to the selected material. Further, depending on the selected material, secondary vulcanization may be performed (temperature 150 ° C. to 300 ° C., time to 24 hours).

  In the present embodiment, unvulcanized rubber is supplied and molded by placing a sheet-like unvulcanized rubber between the upper mold 192a and the coil spring 191 as shown in FIG. 19, and pressing down the upper mold 192a. However, it can also be performed by a method called injection molding or transfer molding. That is, as shown in FIG. 20, the upper mold 192a is brought into contact with the coil spring 191, the upper mold 192a is closed while the coil spring 191 is compressed, and then unvulcanized rubber is injected into the mold 192. Thus, unvulcanized rubber can be supplied into the mold 192. At this time, the unvulcanized rubber can be supplied to the entire region in the mold 192 and the inside of the coil spring 191 by the injection pressure.

  The vibration damping gasket 194 can be obtained through the above steps.

  Next, Example 14 of the present invention will be described. In the fourteenth embodiment, a manufacturing method of the vibration damping gasket 200 in which the exterior member 204 is disposed around the coil spring 201 will be described with reference to FIG.

  First, an annularly formed coil spring 201 is prepared. Since the step of preparing the coil spring 201 formed in an annular shape is the same as in the case of the thirteenth embodiment, detailed description thereof is omitted.

  Next, a process of forming the exterior member 204 disposed around the coil spring 201 will be described. The exterior member 204 is formed by drawing the metal plate 205. In addition, the process of shape | molding this exterior member 204 can also be performed simultaneously irrespective of the process before shape | molding the coil spring 201 cyclically | annularly. The exterior member 204 can also be obtained by drawing the pipe material 206 as shown in FIG. The exterior member 204 in the present embodiment is made of stainless steel, but may be appropriately selected from pure iron, mild steel, chrome steel, copper, brass, aluminum, lead, nickel, titanium, tantalum, and other metals and alloys. it can.

  After forming the annular coil spring 201 and the exterior member 204, both are combined. That is, the coil spring 201 is placed at a predetermined position of the exterior member 204, the exterior member 204 is in contact with the upper and lower surfaces of the coil spring 201, and the exterior member 204 is bent so that the exterior member 204 wraps the coil spring 201. The coil spring 201 and the exterior member 204 are combined. When relatively soft copper or the like is selected as the material of the exterior member 204, a compression load can be applied in the vertical direction at the same time as the bending process or after the bending process, and the coil spring 201 can be bitten into the exterior member 204. . By this biting in, the posture of the coil spring 201 during use can be maintained, the coil spring 201 can be prevented from falling and twisting, and the load resistance can be improved. Further, the strength of the exterior member 204 may be adjusted by heat treatment, shot peening, or the like similar to the coil spring 201 before or after the exterior member 204 is bent.

  After the coil spring 201 and the exterior member 204 are combined, the combined exterior member 204 and the coil spring 201 are degreased, coated with an adhesive, and dried. Degreasing, adhesive application, and drying are substantially the same as the processing performed on the coil spring 191 in the thirteenth embodiment, and thus detailed description thereof is omitted.

  Next, the process of setting the coil spring 201 combined with the exterior member 204 to the mold 202 and supplying the unvulcanized rubber 203 to the mold 202 will be described. A mold 202 having a depth shallower than the height of the coil spring 201 combined with the exterior member 204 is prepared. A coil spring 201 combining the exterior member 204 is set in such a mold 202, and compression molding is performed while the upper mold 202a is in contact with the upper part of the exterior member 204. By performing such compression molding, it is possible to avoid the unvulcanized rubber 203 from wrapping around the upper and lower surfaces of the exterior member 204 in the load direction. That is, the upper and lower surfaces of the exterior member 204 can be exposed from the elastomer after molding.

  Here, as in the case of Example 13, fluoro rubber (FKM) is selected as the unvulcanized rubber 203. The unvulcanized rubber 203 is formed into a sheet by roll molding, and is disposed between the upper mold 202a and the exterior member 204 as shown in FIG. 21, and the mold 202 is pressed down to lower the mold 202. Supplied in. The unvulcanized rubber 203 flows in the mold 202 by the clamping pressure of the mold 202 and is supplied and filled into the coil spring 201 through the space between the wires. These points are the same as in the case of the thirteenth embodiment.

  After the mold 202 is closed, rubber vulcanization is performed while applying pressure, and if the exterior member 204 and the coil spring 201 in a state where vulcanization is completed are taken out, the vibration damping gasket 200 of the present invention can be obtained. In this embodiment, after that, blasting is performed in the same manner as in the thirteenth embodiment. In this blasting process, wet blasting and drive blasting can be selected as appropriate, and polishing can be performed using a polishing machine in the same manner as in Example 13.

  Note that the material and vulcanization of the unvulcanized rubber 203 are the same as in the case of the thirteenth embodiment, and a detailed description thereof will be omitted. The same is true in that the unvulcanized rubber 203 can be supplied and molded by a method called injection molding or transfer molding.

  Next, a fifteenth embodiment of the present invention will be described. In the fifteenth embodiment, a manufacturing method of the vibration damping gasket 210 including the exterior member 211 around the vibration damping gasket 194 manufactured by the manufacturing method described in the thirteenth embodiment will be described with reference to FIG.

  In the manufacturing method of this embodiment, a damping gasket 194 in which a coil spring 191 is embedded in an elastomer is prepared in advance, and the damping gasket 210 is manufactured by combining the damping gasket 194 and the exterior member 211. To do. Therefore, the vibration damping gasket 194 combined with the exterior member 211 is manufactured by a method similar to the method in the thirteenth embodiment. Therefore, detailed description is omitted.

  Next, a method for manufacturing the exterior member 211 will be described. The exterior member 211 is formed by drawing the metal plate 212. In addition, the process of shape | molding this exterior member 211 can also be performed simultaneously irrespective of the process of manufacturing the damping gasket 194, and its front and back. The exterior member 211 can also be obtained by drawing the pipe material. The exterior member 211 in the present embodiment is made of stainless steel, but can be appropriately selected from pure iron, mild steel, chrome steel, copper, brass, aluminum, lead, nickel, titanium, tantalum, and other metals and alloys.

  After manufacturing the damping gasket 194 and forming the exterior member 211, both are combined. That is, the damping gasket 194 is placed at a predetermined position of the exterior member 211, and the exterior member 211 comes into contact with the upper and lower surfaces of the coil spring 191 exposed from the upper and lower surfaces of the damping gasket 194. The exterior member 211 is bent so as to wrap the material, and the damping gasket 194 and the exterior member 211 are combined. When relatively soft copper or the like is selected as the material of the exterior member 211, the coil spring 201 can be bitten into the exterior member 204 by applying a compressive load in the vertical direction simultaneously with or after the bending process. . By this biting in, the posture of the coil spring 191 during use can be maintained, the coil spring 191 can be prevented from falling and twisting, and the load resistance can be improved. Further, the strength of the exterior member 211 may be adjusted by the same heat treatment, shot peening, or the like as the coil spring 191 before or after the exterior member 211 is bent.

  Next, Embodiment 16 of the present invention will be described with reference to FIG. In the damping gasket 220 manufactured by the manufacturing method of Example 16, a first coil spring 221 and a second coil spring 222 are housed in a lower exterior member 225 having a recess, and the first coil spring 221 is stored. The plate-shaped upper exterior member 224 is in contact with the upper surface of the second coil spring 222 and the upper surface of the second coil spring 222. The lower exterior member 225, the first coil spring 221, and the second coil spring 222 are filled with elastomer.

  For such a vibration damping gasket 220, firstly, a first coil spring 221 and a second coil spring 222 formed in an annular shape are prepared. The process of preparing the annularly formed coil springs 221 and 222 is the same as in the case of the thirteenth embodiment, and thus detailed description thereof is omitted.

  The upper exterior member 224 and the lower exterior member 225 are molded together with or around the preparation of the annularly formed coil springs 221 and 222. The upper exterior member 224 is obtained by bending the metal plate 226. The lower exterior member 225 is obtained by drawing the metal plate 226.

  The coil springs 221 and 222, the upper exterior member 224, and the lower exterior member 225 obtained in this manner are combined with an adhesive as shown in the figure after being subjected to degreasing, adhesive application, and drying processes, respectively. It is. The degreasing, adhesive application, and drying steps are substantially the same as the processing performed on the coil spring 191 in Example 13, and thus detailed description thereof is omitted.

  Next, a process of setting a combination of the coil springs 221, 222, the upper exterior member 224, and the lower exterior member 225 in the mold 227 and supplying the unvulcanized rubber 228 to the mold 227 will be described. The mold 227 is prepared such that its depth is shallower than the combined height of the coil springs 221, 222, the upper exterior member 224, and the lower exterior member 225. A combination of the coil springs 221, 222, the upper exterior member 224, and the lower exterior member 225 is set in such a mold 227, and compression molding is performed while the upper mold 227a is in contact with the upper exterior member 224. It has become. By performing such compression molding, it is possible to avoid the unvulcanized rubber 228 from wrapping around the upper surface in the load direction of the upper exterior member 224 and the lower surface in the load direction of the lower exterior member 225. That is, the upper surface in the load direction of the upper exterior member 224 and the lower surface in the load direction of the lower exterior member 225 can be exposed from the elastomer after molding.

  Here, as in the case of the thirteenth embodiment, fluoro rubber (FKM) is selected as the unvulcanized rubber 228. The unvulcanized rubber 228 is formed into a sheet by roll molding, and is disposed between the upper mold 227a and the upper exterior member 224 as shown in FIG. 24, and the mold is formed by pressing the upper mold 227a down. 227 is supplied. The unvulcanized rubber 228 flows through the mold 227 by the clamping pressure of the mold 227 and is supplied into the lower exterior member 225. Further, the coil springs 221 and 222 are also supplied and filled through the space between the wires. The

  After closing the mold 227, rubber vulcanization is performed while applying pressure, and if a combination of the coil springs 221, 222, the upper exterior member 224, and the lower exterior member 225 in a state where vulcanization is completed is taken out, The damping gasket 220 of the present invention can be obtained. In this embodiment, after that, blasting is performed in the same manner as in the thirteenth embodiment. In this blasting process, wet blasting and drive blasting can be selected as appropriate, and polishing can be performed using a polishing machine in the same manner as in Example 13.

  The vibration damping gasket 220 can be manufactured by the method shown in FIG. 25 or the method shown in FIG.

  In the manufacturing method shown in FIG. 25, the first coil spring 221 and the second coil spring 222 are combined with the lower exterior member 225, this is set in the mold 229, and the process proceeds to the heating and compression molding process (press vulcanization). . Here, the mold 229 is shallower than the mold 227. This is because the upper exterior member 224 is not included in the object set in the mold 229 in the manufacturing method shown in FIG. If a blast process is performed after a heating and compression molding process and the upper exterior member 224 obtained by bending from the metal plate 226 is attached, a substantially similar damping gasket 220 can be obtained.

  In the manufacturing method shown in FIG. 26, the first coil spring 221 and the second coil spring 222 are set in a mold 230 having a depth corresponding to these heights, and unvulcanized rubber is supplied, and heating and compression are performed. Processing in the molding process (press vulcanization) is performed. Blasting is performed after the heating and compression molding process. Thereafter, when the separately prepared upper exterior member 224 and lower exterior member 225 are combined, substantially the same damping gasket 220 can be obtained. Even when such a manufacturing method is adopted, the first coil spring 221, the second coil spring 222, the upper exterior member 224 and the lower exterior member 225 are degreased, coated with an adhesive, and dried. The process of performing is the same as in the other embodiments.

  The above-described embodiments are merely examples for carrying out the present invention, and the present invention is not limited thereto. Various modifications of these embodiments are within the scope of the present invention. It is apparent from the above description that various other embodiments are possible within the scope.

  For example, a configuration such as a damping gasket 160 shown in FIG. A damping gasket 160 shown in FIG. 16 includes a first coil spring 1601 and a second coil spring 1602, and the second coil spring 1602 is disposed inside the first coil spring 1601. The first coil spring 1601 and the second coil spring 1602 arranged in this way are included in the metal plate 161 and embedded in the elastomer 3. Even with such a configuration, a high damping function and sealing function can be obtained.

Further, Sn plating (tin plating) or MoS ₂ (molybdenum disulfide) coating can be applied to the surfaces of the metal plate 42 in Example 5, the metal plate 52 in Example 6, and other exterior members. At this time, the sealing property is improved by adjusting the surface roughness after plating or coating. For example, the surface roughness of the mating surface with which the plated surface and the coated surface abut can be about twice.

  Furthermore, a seal lip can be provided by changing the shape of the mold. FIG. 27A shows an example in which a vibration damping gasket 200 ′ having a seal lip 200 a is manufactured using a mold 202 ′ in which the shape of the mold 202 in the embodiment 14 is changed. FIG. 27B shows an example in which a vibration damping gasket 210 ′ having a seal lip 210 a is manufactured using a mold 192 ′ in which the shape of the mold 192 in the fifteenth embodiment is changed.

  Further, FIGS. 28 to 30 include a first coil spring 221 and a second coil spring 222, and plate members 241 and 242 arranged on the upper and lower sides of the load direction as the exterior members, and further a control lip provided with a seal lip 243. An example of the manufacturing method of the vibration gasket 240 is shown. As shown in FIGS. 28 to 30, the same vibration damping gasket 240 can be obtained even if each process is replaced. That is, in the example shown in FIG. 28, plate members obtained by pressing from the first coil spring 221, the second coil spring 222, and the metal plate 226 are prepared, and after degreasing, applying an adhesive, and drying them, respectively. The vibration damping gasket 240 is manufactured by combining, setting these in a mold, heating and compression molding. On the other hand, in the manufacturing method shown in FIG. 29, only the plate member 242 on one side is set in the mold 244 in combination with the first coil spring 221 and the second coil spring 222, subjected to heating and compression molding, and then The damping gasket 240 is manufactured by combining the plate member 241 on the other side. Furthermore, in the manufacturing method shown in FIG. 30, only the first coil spring 221 and the second coil spring 222 are set in a mold, heated and compression-molded, and then the plate members 241 and 242 are combined to dampen the gasket. 240 is manufactured.

  As described above, the vibration damping gasket of the present invention can take various forms, and the manufacturing method can also change the order of each process.

(A) is the top view which fractured | ruptured some vibration damping gaskets of this invention. (B) is the sectional view on the AA line in (a). (A) is a top view of a linear coil spring. (B) is sectional drawing which shows the state which shape | molded the linear coil spring cyclically | annularly and meshed | engaged both ends of the coil spring alternately. It is explanatory drawing which shows the state which installed the damping gasket in the attachment hole 4a provided in the cylinder head. (A)-(e) is sectional drawing of the damping gasket from which sectional shape in Example 2 differs, respectively. 6 is a cross-sectional view of a vibration damping gasket of Example 3. FIG. 6 is a cross-sectional view of a vibration damping gasket of Example 4. FIG. (A), (b) is sectional drawing of the damping gasket from which sectional shape in Example 5 differs, respectively. (A)-(e) is sectional drawing of the damping gasket from which sectional shape in Example 6 differs, respectively. It is explanatory drawing which showed a mode that the 1st coil spring and 2nd coil spring from which winding directions differ were combined. (A), (b) is sectional drawing of the damping gasket from which the cross-sectional shape in Example 7 differs, respectively. It is the graph which showed the load limit of the elastic region of a damping gasket. 10 is a sectional view of a vibration damping gasket of Example 8. FIG. (A)-(e) is sectional drawing of the damping gasket from which sectional shape in Example 9 differs, respectively. It is a top view of the manifold gasket of Example 10. It is explanatory drawing which shows the process in which the damping gasket is mounted to the first substrate in the manifold gasket. It is sectional drawing of the damping gasket of another Example. It is sectional drawing of the damping gasket provided with the wire. It is the top view which fractured | ruptured a part of vibration damping gasket of this invention provided with the processus | protrusion in the internal peripheral surface. It is process drawing which shows an example of the manufacturing method of the damping gasket of this invention. It is explanatory drawing which shows the example of injection molding. It is process drawing which shows the manufacturing method of the other damping gasket of this invention. It is explanatory drawing which shows the example which shape | molds an exterior member from a pipe material. It is process drawing which shows the manufacturing method of the other damping gasket of this invention. It is process drawing which shows the manufacturing method of the other damping gasket of this invention. It is process drawing which shows the manufacturing method of the other damping gasket of this invention. It is process drawing which shows the manufacturing method of the other damping gasket of this invention. It is process drawing which shows the manufacturing method of the other damping gasket of this invention. It is process drawing which shows the manufacturing method of the other damping gasket of this invention. It is process drawing which shows the manufacturing method of the other damping gasket of this invention. It is process drawing which shows the manufacturing method of the other damping gasket of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Damping gasket 2 Coil spring 3 Elastomer 4 Cylinder block 5 Injector 6 Water jacket 42, 45 Metal plate 103, 113, 123, 133, 143 Expansion part 150 Manifold gasket 151 Substrate 152, 153 Fluid flow hole

Claims (40)

A gasket in which an annularly formed coil spring is embedded with an elastomer,
The elastomer is filled up to the inside of the coil spring,
The damping gasket according to claim 1, wherein an exposed portion of the coil spring exposed from the elastomer is provided on at least one of an upper surface and a lower surface in a load direction of the gasket. The vibration-damping gasket according to claim 1,
A cross-sectional shape of the coil spring has two protrusions at one end in the load direction of the gasket and one protrusion at the other end. The vibration-damping gasket according to claim 1,
A vibration damping gasket characterized in that a cross-sectional shape of the coil spring is rectangular. The vibration-damping gasket according to claim 1,
A vibration damping gasket, wherein the coil spring has a trapezoidal cross section. The vibration-damping gasket according to claim 1,
A vibration damping gasket characterized in that the cross-sectional shape of the coil spring is oval or elliptical. The vibration-damping gasket according to claim 1,
A vibration damping gasket, wherein the coil spring has a triangular cross-sectional shape. The vibration-damping gasket according to claim 1,
A vibration-damping gasket, wherein the coil spring in a crushed state is embedded with the elastomer. In the vibration-damping gasket according to any one of claims 1 to 7,
A vibration-damping gasket, wherein the exposed portion is polished. The vibration-damping gasket according to claim 1,
The exposed gasket has a convex shape. The vibration-damping gasket according to any one of claims 1 to 9,
A vibration-damping gasket, comprising a plate body in contact with the exposed portion on at least one of an upper surface and a lower surface in a load direction of the gasket. The vibration-damping gasket according to claim 10,
The vibration damping gasket according to claim 1, wherein the plate body has a bent portion along an outer diameter shape of the coil spring. The vibration-damping gasket according to claim 10 or 11,
A vibration damping gasket, wherein the plate body and the exposed portion are welded or bonded. In damping gasket according to any one of claims 10 or 11,
A vibration-damping gasket, wherein the exposed portion is bitten into the plate. The damping gasket according to any one of claims 1 to 13,
The coil spring has a small diameter winding on one end side, overlaps the one end side to the other end side, joins both ends, and is molded into an annular shape. The vibration damping gasket according to any one of claims 1 to 14,
The vibration damping gasket according to claim 1, wherein the coil spring is a first coil spring and a second coil spring. The vibration damping gasket according to claim 15,
The vibration damping gasket according to claim 1, wherein the first coil spring and the second coil spring are arranged such that center lines of the respective coils coincide with each other. The vibration damping gasket according to claim 15,
The vibration damping gasket according to claim 1, wherein the second coil spring is arranged to be shifted to the inside of the first coil spring. The vibration damping gasket according to any one of claims 15 to 17,
A vibration damping gasket, wherein the winding direction of the first coil spring and the winding direction of the second coil spring are different. The vibration damping gasket according to any one of claims 15, 17 or 18,
A vibration damping gasket, wherein the first coil spring and the second coil spring are connected by a metal plate. The vibration damping gasket according to any one of claims 15, 17 or 18,
The first coil spring and the second coil spring are shifted in the load direction, arranged so that stepped portions are formed on the upper surface and the lower surface in the load direction,
A plate body having a shape along the surface shape of the first coil spring and the second coil spring is arranged on the upper surface and the lower surface in the load direction, and another plate is provided on the surface of the plate body corresponding to the stepped portion. A vibration-damping gasket characterized in that a body is disposed. The vibration damping gasket according to any one of claims 15, 17 or 18,
A vibration-damping gasket, wherein the first coil spring and the second spring are included in a metal plate. The vibration damping gasket according to any one of claims 1 to 21,
A vibration-damping gasket, wherein a seal lip is formed around the coil spring by the elastomer . The vibration damping gasket according to claim 22,
The vibration-damping gasket according to claim 1, wherein the seal lip is provided with an expansion portion that becomes a crushing margin when mounted on a mounting object. The damping gasket according to claim 22 or 23,
An anti-vibration gasket comprising an extending plate that extends toward at least one of an inner peripheral side and an outer peripheral side of the annularly formed coil spring, and the seal lip is formed around the extended plate. 25. The vibration damping gasket according to claim 20, wherein at least one of an upper surface and a lower surface in the load direction of the seal lip is provided with irregularities. The vibration damping gasket according to any one of claims 1 to 25,
A vibration-damping gasket, wherein an elastomer is filled up to the inside of the coil spring. The damping gasket according to claim 26,
A vibration damping gasket, wherein the hardness of the elastomer filled in the coil is lower than the hardness of the elastomer outside the coil. The vibration damping gasket according to any one of claims 1 to 25,
A vibration-damping gasket, comprising a wire passing through the coil of the coil spring. The vibration damping gasket according to any one of claims 1 to 25,
A vibration-damping gasket, comprising a wire disposed along the coil spring. The vibration-damping gasket according to claim 10,
A vibration damping gasket, wherein the plate body is plated. The vibration damping gasket according to any one of claims 1 to 30,
A vibration-damping gasket characterized by having a protrusion on its inner peripheral surface. A manifold gasket comprising the vibration damping gasket according to any one of claims 1 to 31 mounted around a fluid circulation hole provided in a substrate. Forming a coil spring into an annular shape;
A process of degreasing, applying an adhesive and drying the coil spring;
Setting the coil spring in a mold, supplying unvulcanized rubber to the mold, and filling the unvulcanized rubber into the coil spring;
A step of performing press vulcanization on unvulcanized rubber;
A method for producing a vibration-damping gasket, comprising: Forming a coil spring into an annular shape;
Forming an exterior member disposed around the coil spring;
A step of combining an annularly formed coil spring and the exterior member;
Degreasing, applying an adhesive, and drying the exterior member and the coil spring; and
A step of setting a coil spring combined with the exterior member in a mold, supplying unvulcanized rubber to the mold, and filling the unvulcanized rubber into the coil spring;
A step of performing press vulcanization on unvulcanized rubber;
A method for producing a vibration-damping gasket, comprising: Forming a coil spring into an annular shape;
A process of degreasing, applying an adhesive and drying the coil spring;
A step of setting a coil spring in a mold, supplying unvulcanized rubber to the mold, and filling the unvulcanized rubber into the coil spring;
A step of performing press vulcanization on unvulcanized rubber;
Forming an exterior member;
Combining the coil spring subjected to press vulcanization and the exterior member;
A method for producing a vibration-damping gasket, comprising: Forming a coil spring into an annular shape;
Forming the upper exterior member and the lower exterior member;
Degreasing, applying an adhesive, and drying the coil spring, the upper exterior member, and the lower exterior member;
Combining the coil spring with the upper exterior member and the lower exterior member;
The coil spring combined with the upper exterior member and the lower exterior member is set in a mold, unvulcanized rubber is supplied to the mold, and the unvulcanized rubber is filled into the coil spring. Process,
A step of performing press vulcanization on unvulcanized rubber;
A method for producing a vibration-damping gasket, comprising: Forming a coil spring into an annular shape;
Forming the upper exterior member and the lower exterior member;
A step of degreasing, applying an adhesive, and drying the coil spring and the lower exterior member;
Combining the coil spring and the lower exterior member;
Setting the coil spring combined with the lower exterior member in a mold, supplying unvulcanized rubber to the mold, and filling the unvulcanized rubber into the coil spring;
A step of performing press vulcanization on unvulcanized rubber;
Combining the coil spring and the upper exterior member after performing the press vulcanization;
A method for producing a vibration-damping gasket, comprising: Forming a coil spring into an annular shape;
A process of degreasing, applying an adhesive and drying an annular coil spring;
A step of setting a coil spring in a mold, supplying unvulcanized rubber to the mold, and filling the unvulcanized rubber into the coil spring;
A step of performing press vulcanization on unvulcanized rubber;
Forming the upper exterior member and the lower exterior member;
A process of degreasing, applying an adhesive, and drying the upper exterior member and the lower exterior member;
Combining the upper exterior member and the lower exterior member and the coil spring after press vulcanization;
A method for producing a vibration-damping gasket, comprising: In the manufacturing method of the damping gasket as described in any one of Claim 33 thru | or 38,
A method of manufacturing a vibration damping gasket, characterized by subjecting the upper and lower surfaces to polishing or blasting after the press vulcanization. In the manufacturing method of the damping gasket as described in any one of Claim 33 thru | or 38,
A method of manufacturing a vibration damping gasket, wherein a depth of the mold is shallower than a height of a coil spring set in the mold or a coil spring combined with an exterior member.

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