JP2019039487A - Vibration control device - Google Patents

Abstract

To provide a vibration control device with a simple structure excellent in vibration control performance and durability.SOLUTION: A vibration control device of this invention includes an elastic body unit, a pair of fastening members, and a holding member. The elastic body unit has a structure in which a first elastic body composed of a spherical rubber and a second elastic body composed of a plurality of spherical rubbers arranged along a direction of going around the first elastic body are integrally formed. The pair of the fastening member fastens the elastic body unit from a direction along a center axis of the going around direction. The holding member elastically holds a peripheral end of the pair of the fastening members from the outer side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vibration isolator that imparts a vibration isolating function to a floor.

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

  Here, for example, rubber anti-vibration support having a hemispherical elastic bulging contact portion on the outer peripheral portion of the circular elastic body having a circular cross section, and a cover body disposed between a plurality of laminated anti-vibration supports And an anti-vibration device that includes a connecting pin that is provided in the cover body and that is inserted into the connecting pin through hole of the mounting protrusion of each of the anti-vibration supports stacked (see Patent Document 1). .

Utility Model Registration No. 3207516

  However, in the above-described vibration isolator, since the shape of the vibration isolating support is complicated, it is difficult to change the load resistance according to the application. In addition, the above-described vibration isolator, for example, when it is desired to increase the buffering effect, there is a need to increase the number of anti-vibration support stacks, and there is a restriction on the installation space in the height direction. become.

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

  In order to achieve the above object, a vibration isolator according to one embodiment of the present invention includes an elastic body unit, a pair of clamping members, and a holding member. The elastic body unit is formed by integrating a first elastic body made of spherical rubber and a second elastic body made of a plurality of spherical rubbers arranged in a direction around the first elastic body. It has a structure. The pair of clamping members clamps the elastic body unit from a direction along the central axis of the rotation. The holding member elastically holds the peripheral portions of the pair of clamping members from the outside.

  In other words, the vibration isolator is a simple configuration constituted by an elastic body unit in which a plurality of spherical elastic bodies are arranged, each holding member that holds the elastic body unit, and a holding member that holds these peripheral portions. Since the structure is simple, the manufacturing cost can be reduced. In addition, this vibration isolator is structurally designed to increase load resistance by applying an elastic body unit having a structure in which a central elastic body and a plurality of elastic bodies arranged around it are integrated. Thus, the vibration isolator main body can be reduced in size.

  Furthermore, this vibration isolator is provided with the above-described pair of clamping members and holding members, so that when a load is applied and the elastic body unit is displaced in the compression direction, the first and second elastic bodies The mutual mutual displacement is regulated (constrained), and as a result, a gradually increasing spring characteristic in which the characteristic representing the correlation between the load and the deflection rises nonlinearly can be obtained. In addition, this vibration isolator has vibration fatigue characteristics because there is no need to provide, for example, mounting holes in the elastic body unit in which a plurality of spherical elastic bodies are arranged (since there is no cross-sectional defect). Can be increased. Therefore, according to the vibration isolator which concerns on 1 aspect of this invention, the vibration proof performance and durability improvement are realizable with a simple structure.

  Here, the holding member described above can be configured by a shrinkable tube or the like. The pair of clamping members are each formed in a disc shape, for example. Furthermore, rubber or the like can be selected as the material for the first and second elastic bodies. Moreover, the above-described peripheral edge portions of the pair of holding members are bent at an obtuse angle, for example, in a direction in which the pair of holding members approach each other. In this case, it is desirable that the angle formed by the inner side surface of the bent portion and the inner side surface of the non-bent portion in the peripheral edge portion is, for example, not less than 125 ° and not more than 145 °.

  Further, the above-described vibration isolator (vibration isolator main body) is used, for example, interposed in a support mechanism for supporting the floor slab with respect to the floor base. In this case, it is preferable that the support mechanism has a pair of male screw members in which the distal ends thereof are opposed to each other and the male screws are respectively formed. On the other hand, it is preferable that the vibration isolator further includes a pair of female screw members that are joined to the outer side surfaces of the pair of clamping members and that have female screws that are engaged with the male screws of the pair of male screw members.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration isolator of the simple structure excellent in the vibration proof performance and durability can be provided.

FIG. 3 is a plan view partially showing a vibration isolator according to an embodiment of the present invention. Sectional drawing which looked at the vibration isolator shown in FIG. 1 from the front direction. The top view of the elastic body unit with which the vibration isolator shown in FIG. 1 was equipped. The front view of the elastic body unit shown in FIG. AA sectional drawing of the elastic body unit shown in FIG. BB sectional drawing of the elastic body unit shown in FIG. The top view of the clamping member with which the vibration isolator shown in FIG. 2 was provided. Sectional drawing which looked at the clamping member shown in FIG. 7 from the front direction. Sectional drawing which looked at the state before a load is added to the vibration isolator shown in FIG. 2 from the front direction. Sectional drawing which looked at the state where the load was applied to the vibration isolator shown in FIG. 9 from the front direction. The graph which shows the relationship between the load and 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, a vibration isolator 10 according to an embodiment of the present invention is applied to a steel floor of a gymnasium, a base of a wood deck, a vibration isolator floor of a fitness gym, and the like. The anti-vibration device (anti-vibration device main body) 10 is used by interposing a plurality of support mechanisms 9 for supporting the floor slab with respect to the floor base which is a casing.

  That is, the vibration isolator 10 includes the elastic body unit 3, a pair of clamping members (upper metal fittings and lower metal fittings) 7 and 8, a holding member 2, and nuts 11 and 12 as a pair of female screw members. As shown in FIGS. 1 to 6, the elastic body unit 3 includes a spherical first elastic body 3a and a plurality (six) spherical second elastic bodies 3b via connecting portions 3c and 3d. And has an integrated structure. The plurality of second elastic bodies 3b are arranged along the direction of circling 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. 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 0.5, for example, is applied as in the case of the incompressible fluid. Moreover, the elastic body unit 3 is formed in a disk shape as a whole, as shown in FIGS.

  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 configured separately. Further, the material constituting the elastic body unit 3 may be appropriately changed to a rubber material different from natural rubber. Thereby, it becomes possible to give variation to the spring characteristic of the elastic body unit 3.

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

  As shown in FIGS. 7 and 8, the clamping members 7 and 8 are provided with flow holes 7 c and 8 c drilled at the center, and, for example, three flow holes 7 b and 8 b drilled at positions surrounding the flow holes 7 c and 8 c. And. 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 exclude plating solution components coated on the surfaces of the nuts 11 and 12 for preventing corrosion. In addition, you may make it provide the through-hole 7b (or 8b) mentioned above not in both the clamping members 7 and 8, but in either one of the clamping members 7 and 8. FIG.

  In addition, as shown in FIGS. 2 and 8, the pair of sandwiching members 7 and 8 are bent at an obtuse angle in the direction in which the pair of clamping members 7 and 8 approach each other (the peripheral portions 7a and 8a are inclined). ing). In addition, as shown in FIG. 2, the outermost peripheral ends of the disc-shaped clamping members 7 and 8 are separated by a length L in the vertical direction (Z direction), and a gap with a predetermined width is opened. It becomes. As shown in FIG. 8, the angle (inclination angle of the inner surface of the peripheral portions 7a, 8a) α formed by the inner surface of the bent portions of the peripheral portions 7a, 8a and the inner surface of the unfolded portions is 125. It is preferable that the angle is not less than 145 ° and not more than 145 °, and more desirably not less than 130 ° and not more than 140 °. When the angle α is less than 125 °, a sufficient distance L cannot be secured, and the amount of deflection is reduced. On the other hand, when the angle exceeds 145 °, the contact surface that restricts the deflection by the peripheral edge portion 7a decreases, and a desired non-linear spring cannot be obtained.

  As shown in FIG. 2, the bent portions of the peripheral portions 7a and 8a of the sandwiching members 7 and 8 have a plurality of elastic bodies 3a when a load is applied and the elastic body unit 3 is displaced in the compression direction (vertical direction Z). 3b acts to regulate mutual displacement (displacement in the direction in which the elastic bodies are arranged, that is, displacement in the direction perpendicular to the vertical direction Z), and obtains a spring characteristic in which the relationship between the load and the deflection is nonlinear. 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 center portion of the outer surfaces (non-clamping surfaces) of the pair of clamping members 7 and 8. Are joined by. Here, as shown in FIG. 2, the above-described support mechanism 9 in which the vibration isolator 10 is interposed has a pair of male screw members 5 and 6 that are disposed so that their distal ends 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 screws 11a and 12a that are screwed (screwed) to the male screws of the male screw members 5 and 6, respectively. That is, as shown in FIG. 2, the plurality of vibration isolation devices 10 are attached to the plurality of support mechanisms 9 by screwing the male screw members 5 and 6 on the support mechanism 9 side and the nuts 11 and 12 on the vibration isolation device 10 side. Thus, a floating floor that supports the floor slab in the vertical direction (Z direction) with respect to the floor base can be configured.

  As shown in FIGS. 1 and 2, the holding member 2 elastically holds the peripheral portions 7 a and 8 a of the pair of sandwiching members 7 and 8 from the outside. The holding member 2 covers the gap between the outermost peripheral ends of the sandwiching members 7 and 8 from the outer sides of the peripheral portions 7a and 8a over the entire circumference of the disc-shaped sandwiching member main body. The holding member 2 is constituted by a heat shrinkable tube using ethylene propylene rubber having high weather resistance as a material.

  The heat shrinkable tube is applied such that, for example, an outer diameter of about 100 mm diameter shrinks to about 50 mm diameter by heating to about 110 ° C. to 160 ° C. The holding member 2 is attached to the peripheral portions 7a and 8a of the holding members 7 and 8 by the heat treatment described above. Such a holding member 2 can be easily elastically deformed and follows the deformation of the elastic body unit 3, thereby affecting the spring characteristics (particularly the spring constant in the vertical direction) of the elastic body unit 3. Is suppressed. Note that the holding member 2 described above may be constituted by a normal temperature shrinkable tube instead of the heat shrinkable tube.

  The vibration isolator 10 configured as described above includes an elastic body unit 3 in the form of a plurality of spherical elastic bodies 3a and 3b, holding members 7 and 8 that hold the elastic unit 3 and peripheral edge portions 7a, Since it is a simple structure comprised by the holding member 2 holding 8a, it becomes possible to reduce manufacturing cost. Furthermore, the vibration isolator 10 applies the elastic body unit 3 having a structure in which the first elastic body 3a located at the center and the plurality of second elastic bodies 3b arranged around the first elastic body 3a are integrated. Therefore, it is structurally easy to increase the load resistance, and the vibration isolator body can be downsized.

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

  More specifically, in the vibration isolator 10, as described above, the holding members 7 and 8 obtained by bending the peripheral portions 7a and 8a and the holding member 2 that elastically holds the peripheral portions 7a and 8a are illustrated 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 elastic bodies 3a and 3b are mutually connected. 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 holding members 7 and 8 are in contact with each other as shown in FIG. As a result, the vibration isolator 10 can obtain a gradually increasing spring characteristic in which the characteristic representing the correlation between the load and the deflection (displacement) rises nonlinearly (increases exponentially) as shown in FIG. it can.

  In addition, in the vibration isolator 10, the elastic unit 3 in which a plurality of spherical elastic bodies 3a and 3b are arranged does not need to be provided with, for example, mounting holes (since there is no cross-sectional defect). , Vibration fatigue characteristics can be enhanced.

  As described above, according to the vibration isolator 10 according to the present embodiment, it is possible to improve the vibration isolating performance and durability with a simple structure.

  As mentioned above, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 2 ... Holding member, 3 ... Elastic body unit, 3a ... 1st elastic body, 3b ... 2nd elastic body, 5, 6 ... Male screw member, 7, 8 ... Clamping member, 7a, 8a ... Peripheral part of clamping member , 9 ... support mechanism, 9a ... central axis, 10 ... vibration isolator, 11, 12 ... nut (female screw member), 11a, 12a ... female screw, Z ... vertical direction, α ... angle (obtuse angle).

Claims (6)

An elastic body unit in which a first elastic body made of a spherical rubber and a second elastic body made of a plurality of spherical rubbers arranged in a direction around the first elastic body are integrated;
A pair of clamping members for clamping the elastic body unit from a direction along the central axis of the circulation;
A holding member that elastically holds the peripheral edge of the pair of clamping members from the outside;
An anti-vibration device comprising: The holding member is constituted by a shrinkable tube,
The vibration isolator according to claim 1. Each of the pair of clamping members is formed in a disc shape.
The vibration isolator according to claim 1 or 2. The pair of clamping members are inclined at the peripheral edge in a direction in which the pair approaches each other.
The vibration isolator according to any one of claims 1 to 3, wherein The angle of inclination of the inner surface at the peripheral edge is 125 ° or more and 145 ° or less.
The vibration isolator according to claim 4. The first elastic body and the second elastic body are disposed adjacent to each other via a connecting portion,
The vibration isolator according to any one of claims 1 to 5, characterized in that:

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