JP6830871B2 - Anti-vibration device - Google Patents

Description

The present invention relates to an anti-vibration device that imparts an anti-vibration function to a floor.

Anti-vibration devices are applied to steel floors in gymnasiums, foundations for wooden decks, and anti-vibration floors in fitness gyms. In this type of anti-vibration device, in order to improve the sound insulation characteristics against heavy floor impact sound, a floor slab or the like is supported at points by anti-vibration rubber against the floor base. As such anti-vibration rubber, for example, one having a circular cross section whose contact area changes depending on a load is adopted.

Here, for example, a rubber anti-vibration support having a hemispherical elastic bulging contact portion on the outer periphery of the annular elastic body having a circular cross section, and a cover body arranged between a plurality of laminated anti-vibration supports. And, a vibration isolator equipped with a connecting pin provided in the cover body and inserted into a connecting pin punching hole of a projecting piece for mounting each of the laminated anti-vibration supports has been proposed (see Patent Document 1). ..

Utility Model Registration No. 3207516

However, in the above-mentioned anti-vibration device, since the shape of the anti-vibration support is complicated, it is difficult to change the load capacity according to the application. Further, in the above-mentioned anti-vibration device, for example, when it is desired to increase the cushioning effect, it is necessary to increase the number of layers of the anti-vibration support to take measures, so that the installation space in the height direction is restricted. become.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a vibration isolator having a simple structure having excellent vibration isolation performance and durability.

In order to achieve the above object, the vibration isolator according to one aspect of the present invention includes an elastic unit, a pair of holding members, and a holding member. The elastic body unit is a combination of a first elastic body made of spherical rubber and a second elastic body made of a plurality of spherical rubbers arranged along a direction around the first elastic body. Has a structure. The pair of sandwiching members sandwich the elastic unit from the direction along the central axis of the circumference. The holding member elastically holds the peripheral edges of the pair of holding members from the outside.

That is, this vibration isolator is a simple structure composed of an elastic unit in the form of arranging a plurality of spherical elastic bodies, each holding member for holding the elastic body, and a holding member for holding the peripheral edge portions thereof. Since it has a simple structure, it is possible to reduce the manufacturing cost. In addition, this anti-vibration device is structurally capable of increasing the load capacity by applying an elastic body unit having a structure in which a central elastic body and a plurality of elastic bodies arranged around the central elastic body are integrated. This facilitates the miniaturization of the vibration isolator main body.

Further, this vibration isolator is provided with the pair of holding members and holding members described above, so that when a load is applied and the elastic body unit is displaced in the compression direction, the first and second elastic bodies are present. The displacement of each other is regulated (constrained), which makes it possible to obtain a gradual increase type spring characteristic in which the characteristic representing the correlation between the load and the deflection rises non-linearly. Further, this vibration isolator has vibration fatigue characteristics because it is not necessary to provide, for example, a hole for mounting in the elastic body unit in which a plurality of spherical elastic bodies are arranged (because there is no cross-sectional defect). Can be enhanced. Therefore, according to the vibration isolator according to one aspect of the present invention, improvement of vibration isolation performance and durability can be realized with a simple structure.

Here, the holding member described above can be configured by a shrink tube or the like. Further, the pair of holding members are formed in a disk shape, for example. Further, as the material of the first and second elastic bodies, rubber or the like can be selected. Further, in the pair of holding members, the peripheral portions described above are bent at an obtuse angle in the direction in which they approach each other. In this case, it is desirable that the angle formed by the inner surface of the bent portion and the inner surface of the non-bent portion in the peripheral portion is, for example, 125 ° or more and 145 ° or less.

Further, the vibration isolator (vibration isolator main body) described above is used, for example, intervening in a support mechanism for supporting the floor slab with respect to the floor base. In this case, the support mechanism preferably has a pair of male screw members in which the tips thereof are arranged so as to face each other and the male screws are formed respectively. On the other hand, it is desirable that the vibration isolator further includes a pair of female screw members which are joined to the outer surfaces of each of the pair of holding members and have a female screw formed which is screwed with the male screw of the pair of male screw members.

According to the present invention, it is possible to provide a vibration isolator having a simple structure having excellent vibration isolation performance and durability.

The plan view which shows the vibration isolation device which concerns on embodiment of this invention partially see through. A cross-sectional view of the vibration isolator shown in FIG. 1 as viewed from the front direction. FIG. 3 is a plan view of an elastic body unit provided with the vibration isolator shown in FIG. The front view of the elastic body unit shown in FIG. A cross-sectional view taken along the line AA of the elastic body unit shown in FIG. BB sectional view of the elastic body unit shown in FIG. FIG. 2 is a plan view of a holding member included in the vibration isolator shown in FIG. A cross-sectional view of the sandwiching member shown in FIG. 7 as viewed from the front direction. A cross-sectional view of the state before a load is applied to the vibration isolator shown in FIG. 2 as viewed from the front direction. A cross-sectional view of a state in which a load is applied to the vibration isolator shown in FIG. 9 as viewed from the front direction. The graph which shows the relationship between the load and the deflection (displacement) of the vibration isolator shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vibration isolator 10 according to the embodiment of the present invention is applied to a steel floor of a gymnasium, a base of a wooden deck, a vibration isolation floor of a fitness gym, and the like. The vibration isolator (vibration isolator main body) 10 is used by interposing each of a plurality of support mechanisms 9 for supporting the floor slab with respect to the floor base which is the skeleton.

That is, the vibration isolator 10 includes an elastic unit 3, a pair of holding members (upper metal fittings and lower metal fittings) 7, 8, a holding member 2, and nuts 11 and 12 as a pair of female screw members. As shown in FIGS. 1 to 6, in the elastic body unit 3, a spherical first elastic body 3a and a plurality (six) spherical second elastic bodies 3b are interposed via connecting portions 3c and 3d. And has an integrated structure. The plurality of second elastic bodies 3b are arranged along the direction of orbiting the first elastic body 3a.

The connecting portion 3c connects the first elastic body 3a and the second elastic body 3b. On the other hand, the connecting portion 3d connects the adjacent second elastic bodies 3b to each other. The elastic body unit 3 including the first and second elastic bodies 3a and 3b and the connecting portions 3c and 3d is obtained by integrally molding a rubber material such as natural rubber (NR) with a mold. As the material of the elastic body unit 3, a material having a Poisson's ratio of, for example, 0.5 is applied as in the case of an incompressible fluid. Further, as shown in FIGS. 3 and 4, the elastic body unit 3 is formed in a disk shape as a whole.

In addition, instead of the integrated elastic body unit 3, each of the first elastic body 3a and the plurality of second elastic bodies 3b may be formed as separate bodies. Further, the material constituting the elastic body unit 3 may be appropriately changed to a rubber material different from the natural rubber. This makes it possible to give variation to the spring characteristics of the elastic body unit 3.

As shown in FIG. 2, the pair of sandwiching members 7 and 8 sandwich the elastic body unit 3 from the direction along the central axis of the circumference (the virtual axis that is the center that orbits the first elastic body 3a) 9a. To do. The sandwiching members 7 and 8 are manufactured by forming a steel plate such as SPCC (cold rolled steel plate) into a disk shape.

As shown in FIGS. 7 and 8, the sandwiching members 7 and 8 are formed so as to surround the flow holes 7c and 8c formed in the central portion and the flow holes 7c and 8c, for example, three flow holes 7b and 8b. And have. The flow holes 7b and 8b are provided to remove moisture and air from the vibration isolator 10 (for example, to prevent the occurrence of an air spring action). The flow holes 7c and 8c are provided to eliminate plating liquid components and the like coated on the surfaces of the nuts 11 and 12 for corrosion prevention. The above-mentioned distribution hole 7b (or 8b) may be provided not only in both of the sandwiching members 7 and 8 but also in one of the sandwiching members 7 and 8.

Further, as shown in FIGS. 2 and 8, the pair of holding members 7 and 8 have their peripheral edges 7a and 8a bent at obtuse angles in the direction in which they approach each other (the peripheral edges 7a and 8a are inclined). ing). As shown in FIG. 2, the outermost peripheral ends of the disk-shaped sandwiching members 7 and 8 are separated by a length L in the vertical direction (Z direction), and a gap having a predetermined width is provided. It becomes. As shown in FIG. 8, the angle formed by the inner surface of the bent portion and the inner surface of the non-bent portion in the peripheral portions 7a and 8a (the angle of inclination of the inner surface in the peripheral portions 7a and 8a) α is 125. It is preferably ° or more and 145 ° or less, and more preferably 130 ° or more and 140 ° or less. If this angle α is less than 125 °, a sufficient interval L cannot be secured, so that the amount of deflection decreases. On the other hand, if it exceeds 145 °, the contact surface that regulates the deflection due to the peripheral edge portion 7a decreases, and a desirable non-linear spring cannot be obtained.

As shown in FIG. 2, the bent portions of the peripheral edges 7a and 8a of the holding members 7 and 8 have a plurality of elastic bodies 3a when the elastic body unit 3 is displaced in the compression direction (vertical direction Z) by applying a load. It acts to regulate the displacement of 3b to each other (displacement in the direction in which elastic bodies are lined up, that is, displacement in the direction orthogonal to the vertical direction Z), and obtains spring characteristics in which the relationship between load and deflection is non-linear. Is possible.

As shown in FIGS. 1, 2, 7, and 8, the pair of nuts (female screw members) 11 and 12 are welded to the central portion of the outer surface (non-pinching surface) of each of the pair of sandwiching members 7 and 8. Are joined by. Here, as shown in FIG. 2, the above-mentioned support mechanism 9 in which the vibration isolator 10 is interposed has a pair of male screw members 5 and 6 whose tips are arranged so as to face each other. Male threads are formed on the outer peripheral surfaces of the male thread members 5 and 6, respectively.

On the other hand, the nuts 11 and 12 are formed with female threads 11a and 12a that are screwed (screwed) with the male threads of the male thread members 5 and 6. That is, as shown in FIG. 2, by screwing the male screw members 5 and 6 on the support mechanism 9 side and the nuts 11 and 12 on the vibration isolator 10 side, a plurality of vibration isolators 10 are attached to the plurality of support mechanisms 9. Can be interposed, thereby forming a floating floor that supports the floor slab in the vertical direction (Z direction) with respect to the floor base.

Further, as shown in FIGS. 1 and 2, the holding member 2 elastically holds the peripheral edges 7a and 8a of the pair of holding members 7 and 8 from the outside. Further, the holding member 2 covers the gap between the outermost outer peripheral ends of the holding members 7 and 8 from the outside of the peripheral edges 7a and 8a over the entire circumference of the disk-shaped holding member main body. The holding member 2 is composed of a heat-shrinkable tube made of ethylene propylene rubber having high weather resistance as a material.

As this heat-shrinkable tube, for example, a tube having an outer diameter of about 100 mm in diameter shrinking to about 50 mm in diameter by heating to about 110 ° C. to 160 ° C. is applied. By the above heat treatment, the holding member 2 is attached to the peripheral edges 7a and 8a of the holding members 7 and 8. Since such a holding member 2 can be easily elastically deformed and follows the deformation of the elastic body unit 3, it may affect the spring characteristics (particularly the spring constant in the vertical direction) of the elastic body unit 3. Is suppressed. The holding member 2 may be formed of a room temperature shrinkable tube instead of the heat shrinkable tube.

The anti-vibration device 10 configured in this way includes an elastic body unit 3 in which a plurality of spherical elastic bodies 3a and 3b are arranged, each holding member 7 and 8 for sandwiching the elastic body unit 3, and a peripheral portion 7a thereof. Since it has a simple structure composed of a holding member 2 for holding 8a, it is possible to reduce the manufacturing cost. Further, the vibration isolator 10 applies an elastic body unit 3 having a structure in which a first elastic body 3a located at the center and a plurality of second elastic bodies 3b arranged around the first elastic body 3a are integrated. Therefore, it is structurally easy to increase the load capacity, and the size of the vibration isolator main body can be reduced.

Further, in the vibration isolator 10, by restricting the displacement of the elastic body unit 3 by the holding members 7 and 8 and the holding member 2, the natural frequency is substantially within the set range even when the load changes. Can be made constant.

More specifically, in the vibration isolator 10, as described above, the sandwiching members 7 and 8 in which the peripheral edges 7a and 8a are bent and the holding member 2 elastically holding the peripheral edges 7a and 8a are shown in FIG. As shown in FIG. 10, when a load is applied in the vertical direction Z and the elastic body unit 3 is displaced in the compression direction (vertical direction Z), the first and second plurality of elastic bodies 3a and 3b are placed on each other. It acts to regulate the displacement (displacement in the direction orthogonal to the vertical direction Z). Further, the outer peripheral portion of the second elastic body 3b and the peripheral portions 7a and 8a of the sandwiching members 7 and 8 come into contact with each other as shown in FIG. 10 and act to regulate the displacement. As a result, as shown in FIG. 11, the vibration isolator 10 can obtain a gradual increase type spring characteristic in which the characteristic representing the correlation between the load and the deflection (displacement) rises non-linearly (exponentially increases). it can.

Further, in this vibration isolator 10, it is not necessary to provide, for example, a hole for mounting in the elastic body unit 3 in which a plurality of spherical elastic bodies 3a and 3b are arranged (because there is no cross-sectional defect). , Vibration fatigue characteristics can be improved.

As described above, according to the anti-vibration device 10 according to the present embodiment, improvement in anti-vibration performance and durability can be realized with a simple structure.

Although the embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. This novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.

2 ... Holding member, 3 ... Elastic body unit, 3a ... First elastic body, 3b ... Second elastic body, 5, 6 ... Male screw member, 7, 8 ... Holding member, 7a, 8a ... Peripheral portion of holding member , 9 ... Support mechanism, 9a ... Central axis, 10 ... Anti-vibration device, 11, 12 ... Nut (female thread member), 11a, 12a ... Female thread, Z ... Vertical direction, α ... Angle (obtuse angle).

Claims (6)

An elastic body unit in which a first elastic body made of spherical rubber and a second elastic body made of a plurality of spherical rubbers arranged along a direction around the first elastic body are integrated.
A pair of holding members that hold the elastic unit from a direction along the central axis of the circumference, and
A holding member that elastically holds the peripheral edge of the pair of holding members from the outside,
A vibration isolation device characterized by being provided with. The holding member is composed of a shrink tube.
The anti-vibration device according to claim 1. Each of the pair of holding members is formed in a disk shape.
The anti-vibration device according to claim 1 or 2. The peripheral portions of the pair of holding members are inclined in a direction in which they approach each other.
The anti-vibration device according to any one of claims 1 to 3, wherein the anti-vibration device is characterized. The angle of inclination of the inner surface of the peripheral portion is 125 ° or more and 145 ° or less.
The anti-vibration device according to claim 4. The first elastic body and the second elastic body are arranged adjacent to each other via a connecting portion.
The anti-vibration device according to any one of claims 1 to 5, wherein the anti-vibration device is characterized.

Images