JP2001271881A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relax impact of lateral shakes, caused by an earthquake by flexibly absorbing the lateral shaking of a room surrounded by a partition wall 20, while following the large vertical shaking of the room without resistance. SOLUTION: This vibration control device is mounted between the partition walls for insulating vibration. An elastic body block 22 is formed of a rubber elastic body. A shaft 29 pierces the elastic body block 22, projecting its end by a prescribed length. A holder member 23 holds the elastic body block while surrounding it. A shaft fixing member 26 fixes the shaft 29 to one partition wall 20. A bolt 27 fixes the holder member 23 to the other partition wall 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator mounted between partitions for insulating vibrations.

[0002]

2. Description of the Related Art In an architectural space, in order to ensure high sound insulation performance, to prevent sound and vibration generated from a target room from being transmitted to an adjacent room, and to prevent vibration and noise from entering from outside the target room. In order to avoid this, it has been adopted to provide a sound insulation layer which is supported from the main body structure in a vibration-proof manner.
In recent years, a wide range of soundproofing and vibration-proofing work has been carried out from rehearsal rooms and studios as small spaces to TV studios and halls in large spaces, which has helped to maintain a comfortable space.

FIG. 2A is a longitudinal sectional view of a room surrounded by a partition having a double structure for insulating vibration, and FIGS. 2B and 2C respectively show a conventional vibration isolator. It is a longitudinal section showing an example. In FIG. 2A, the wall of the hall 1 in which the soundproof / vibration-proof structure is adopted generally has a double structure, and a frame or a fixed wall 4 fixedly supported by a building structure main body and the wall thereof. It is composed of a floating wall 1A supported from the fixed wall 4 via anti-vibration members 3 and 5. The lower end of the floating wall 1A is supported by a floor 2 having a vibration isolating structure, a vibration isolating material 3, and the like. However, in order to make the floating wall 1A stand alone so that it does not fall out of the plane, an intermediate level and an upper end are required. It is necessary to support parts. They also need to be supported so that they do not collapse during an earthquake. Therefore, it is necessary to prevent the floating wall 1A from swaying horizontally. Since the horizontal steady rest by fixedly joining to the fixed wall 4 serving as the frame significantly reduces the soundproofing effect, the horizontal steady rest also needs an anti-vibration structure using an anti-vibration rubber or the like.

[0004] The anti-vibration steady rest has a structure in which the anti-vibration stabilizer is supported between the walls of the frame and the respective holes via anti-vibration rubber, so that vibration can be insulated. This vibration isolation effect can be increased as the difference between the vibration frequency f of the vibration source and the natural frequency fn of the vibration system supported by the vibration isolating rubber increases. Further, by using a vibration-proof rubber having a permissible load larger than the horizontal force generated for the floating wall 1A to stand on its own as a vibration-vibration rest, the floating wall 1A can be supported in a vibration-proof manner.
In addition, the use of anti-vibration rubber that has a short-term allowable load greater than the short-term horizontal force (caused during an earthquake) due to the wall mass and seismic force, and using anti-vibration support hardware that will not break, It is possible to prevent. A vibration isolator applied to such a place is, for example, Japanese Utility Model Laid-Open No. 6-51579.
It is introduced in the official gazette.

[0005]

However, the above-mentioned prior art has the following problems to be solved. In the structure as shown in FIG. 2A, when it is assumed that the room 1 shakes greatly at a high seismic intensity, the room shake (the X direction in FIG. 2) is absorbed more flexibly, and It is necessary to mitigate the impact against the lateral runout. In addition, a function that can follow a large vertical swing (Y direction in FIG. 2) of the room without resistance is also required. Furthermore, there is also a demand for reducing the number of parts as much as possible to reduce material costs and construction costs.

FIG. 2B shows an example of a conventional anti-vibration vibration isolator. The anti-vibration steady rest is fixed to a fixed wall 41 by a bolt 42. A pair of units having a structure in which a rubber-like elastic body 43 is sandwiched between an upper fitting 44 and a lower fitting 45 are arranged with the lower fitting 45 facing each other, and the bolts 42 penetrate these. A mounting frame 47 that supports a floating wall (not shown) includes a pair of lower brackets 45 that are arranged to face each other.
Sandwiched between.

If the anti-vibration steady rest is installed in a state as shown in the figure, a sufficient vibration insulating effect can be expected. In this structure, the mounting frame 47 and the bolt 42 need to be vibrationally insulated, but the clearance between the bolt 42 and the mounting frame 47 is very small in the through hole of the mounting frame 47, and the rubber-like elastic material 43 is also very thin. Therefore, if a large load is applied in the direction of arrow Y in FIG. 2B or if the bolt 42 is inclined and the installation state is poor, the mounting frame 47 and the bolt 42 come into contact with each other via the thin rubber-like elastic body 43 to prevent the installation. There is a risk of reducing the vibration effect.

That is, the longitudinal direction of the bolt 42 (FIG. 2B)
(In the direction of arrow X), the impact force is reduced, but the movable range of the floating wall is as small as the clearance between the bolt 42 and the mounting frame 47, and the effect of reducing the impact force is lost in the moved state. I will.
In addition, if the stop is performed in this state, the mounting frame 47 and the bolt 42 come into contact with each other via the thin rubber-like elastic body 43, and there is a risk that the vibration-proof effect is reduced.

FIG. 2C shows a vibration damping device having another structure. In this vibration isolator, a rubber-like elastic body 9 is fitted between a cylindrical casing fitting 10 and an inner fitting 11 arranged coaxially. A projection 8 is provided on the outer surface of the casing fitting 10. This device consists of an outer fixed wall 4
The casing metal fitting 10 is fixed to the floating wall 1A of the room 1 by using the bracket 13 and the bolts 12 to fix the casing metal fitting 10 to the floating wall 1A of the room 1. Thereby, the relative displacement between the outer fixed wall 4 and the floating wall 1A of the room 1 is absorbed, and the impact such as the lateral shake due to the earthquake or the like is reduced.

However, in this vibration isolator, when a lateral run-out occurs, a moment acts between one bracket 13 and the other bracket 14, and the inner fitting 11 and the rubber-like elastic body 9 move on the horizontal plane of the bracket 13. May tilt or twist. In this case, the predetermined steady rest effect and durability are impaired.

Further, the casing fitting 10 and the bracket 1
Although the projections 8 are provided on the outer surface of the casing metal fitting 10 in order to connect the casing 4 with the casing 4, since the casing metal fitting 10 is cylindrical, the manufacturing process of the projection 8 is complicated and the cost is increased.

The present invention has been made to solve the above problems, and relates to a vibration isolator which achieves the following objects. 1. A structure that does not reduce the vibration-proof effect due to the mounting hardware fixed to the floating wall side coming into contact with the fixed wall or the hardware fixed thereto due to insufficient mounting accuracy or the like. 2. Since the floating wall is supported by anti-vibration, it is conceivable that it will be lowered vertically by the supporting mass after the installation, but even at this time, the mounting hardware on the floating side will come in contact with the fixed wall and the hardware fixed to it, and The structure must not reduce the effect. 3. The spring constant in the vertical direction is reduced, the load support in the vertical direction (arrow Y direction in FIG. 2) is suppressed as much as possible, and the horizontal direction substantially perpendicular to the vertical axis (arrow X direction in FIG. 2) is included.
A structure that can restrict movement in the direction of 0 ° but also has an anti-vibration effect. 4. The rigidity is substantially the same in the horizontal 360 ° direction including the X direction and the Y direction in FIG.

[0013]

The present invention employs the following configuration to achieve the above object. <Arrangement 1> An elastic block made of a rubber-like elastic body, which is mounted between partition walls for insulating vibration,
A shaft penetrating at least one end of the elastic block through a predetermined length, a holder member surrounding the elastic block, a shaft fixing member fixing the shaft to one of the partition walls, and A holder fixing member fixed to the other of the two.

<Structure 2> In the vibration isolator according to Structure 1, the shaft protrudes from both sides of the elastic block by a predetermined length, and both ends of the shaft are fixed to one of the partition walls by the shaft fixing member. A vibration isolator.

<Structure 3> In the vibration damping device described in Structure 1, the elastic block grips the shaft with elasticity, and the shaft and the elastic block are not adhered. And anti-vibration device.

<Structure 4> In the vibration damping device according to Structure 1, the holder grips the elastic block with elasticity.
The holder and the elastic block are not adhered to each other.

<Structure 5> In the vibration damping device described in Structure 1, the elastic block has a cylindrical shape, and the shaft penetrates a shaft portion of the elastic block. Having a curved portion surrounding the above, the shaft is disposed so as to be substantially perpendicular to the floor of the building having the partition, and the vertical load of the partition is the other member on the floor of the building. An anti-vibration device characterized by being supported by:

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below using specific examples. 1A and 1B show an example of a vibration isolator according to the present invention, wherein FIG. 1A is an exploded perspective view and FIG. 1B is a side view when the vibration isolator is attached to a partition. The vibration isolator includes an elastic block 22, a holder member 23, a shaft 2
9 is provided. The elastic block 22 is made of a rubber-like elastic body. As the material of the elastic block 22, for example, natural rubber or synthetic rubber such as chloroprene rubber or nitrile rubber is suitable. The shaft 29 is formed of a metal rod having a length selected so as to penetrate the elastic block 22 and project at least one end at a predetermined length. Suitable material for the shaft 29 is stainless steel, non-ferrous metal, hard plastic or the like. In this example, as shown in FIG. 1B, both ends protrude by a length L. Hereinafter, the partition refers to the vibration-proofing wall including the fixed wall and the floating wall described with reference to FIG.

The holder member 23 is made of a metal plate curved so as to surround the elastic block 22. The material of the holder member 23 is SS400 (JIS G 3101), SPCC (JIS G 31
41), SPHC (JIS G 3131), SECC, SEHC (JIS G 3313), SGC
C, SGHC (JIS G 3302) and other steel materials, stainless steel,
Nonferrous metals, hard plastics, etc. are suitable. In this example,
The holder member 23 has a curved portion 23 </ b> A that surrounds the side surface of the elastic block 22 by half or more. Thus, the elastic block 22 is elastically held by the holder member 23, and the two are integrated in a non-adhered state.

The reason why the holder member 23 surrounds the side surface of the elastic block 22 by half or more is to prevent the elastic block 22 from falling off and to obtain the same spring constant in all directions. It is preferable that the inner diameter of the curved portion 23A be 90% or more and less than 100% of the outer diameter of the elastic block 22. If the inner diameter of the curved portion 23A is too large, the holding force is insufficient, and if it is too small, the elastic portion
This is because A is deformed.

The shaft 29 and the elastic block 22
The holder member 23 and the holder member 23 may be bonded to each other. In the case of bonding, the elastic body block 22 and the holder member 23 may be integrally vulcanized and bonded together to bond the bonding surfaces, or the bonding surfaces may be bonded in an assembled state. FIG. 1 (b)
Prior to the description, each component will be described in more detail with reference to FIG.

FIGS. 3A and 3B are parts diagrams of the vibration isolator shown in FIG. 1, wherein FIG. 3A is a plan view of the elastic block, FIG. 3B is a longitudinal sectional view of the elastic block, and FIG. FIG. 3D is a partial longitudinal sectional view, FIG. 4D is a top view of a holder member, FIG. 4E is a longitudinal sectional view of a shaft, and FIG. FIG.
As shown in (a) and (b), the elastic block 22 has a through hole 22 for receiving a shaft 29 in a shaft portion thereof.
A is provided. In this example, the shaft 29
Is inserted into the elastic block 22 in a non-adhered state,
Both are integrated with appropriate elasticity.

As shown in FIGS. 3C and 3D, the holder member 23 has a curved portion 23A for surrounding and holding the elastic block 22. As shown in FIGS. 3E and 3F, the shaft 29 has a tapped bolt hole 29A on the upper and lower surfaces thereof to receive the bolt 24 shown in FIG.

The description will be continued with reference to FIG. FIG.
As shown in (b), this vibration isolator is mounted between partition walls 20 and 21 for insulating vibration. The partition 20 is a side wall of the room 1 in FIG. The shaft 29 is fixed to the partition 20 by bolts 24 and brackets 25. The bolt 24 and the bracket 25 are put together to form a shaft fixing member 26.
I will call it. The holder member 23 is fixed to the partition 21 by bolts 27 passing through bolt holes 28 at both ends thereof. This bolt 27 is called a holder fixing member.

In the example shown in FIG.
Project from the elastic block 22 held by the holder member 23 by a predetermined length L, and both ends of the shaft 29 are fixed to the partition wall 20 by the shaft fixing member 26.
Further, the shaft 29 is disposed so as to be substantially perpendicular to the floor of the building having the partition wall 20.

As described above, in this example, the shaft 29
Since the elastic member 22 and the holder member 23 are not bonded to each other, this vibration isolator has almost no function of supporting the vertical load of the partition wall 20. The main function is to support the function of preventing the collision between the partition walls 20 and 21 due to the horizontal swing of the room and reducing the impact. Therefore, in this example, the vertical load of the partition wall 20 is supported by another vibration isolator 3 or the like on the floor 2 of the building as shown in FIG.

The operation of the above-described vibration isolator will be described with reference to FIG. First, the vibration isolator hardly exerts a reaction force on loads and vibrations in the direction of arrow A in FIG. 1, that is, in the direction perpendicular to the floor surface. Therefore, FIG.
In the case where a large vertical shake occurs in the room 1 shown in (a), the vertical vibration-proof effect of the vibration-proof material 3 supporting the room 1 is not hindered.

On the other hand, if a lateral run-out occurs in which the distance between the partition walls 20 and 21 in FIG.
The impact is alleviated by the elasticity of the elastic block 22 located between the elastic member 22 and the holder member 23. Moreover, the shaft 29
Is extended up and down by a predetermined length L, so that FIG.
As shown by arrow B, when the room swings irregularly,
The shaft 29 uses the elastic block 22 as a fulcrum and swings its upper and lower ends like a pendulum.

Even if there is a large irregular vibration in the X and Y directions shown in FIG. It does not lose the anti-vibration function. In order to obtain this effect, the length L of the extended portion of the shaft 29 is selected so that the shaft 29 and the holder member 23 do not collide with each other even in the supposed maximum deflection in any direction. .

As described above, the anti-vibration device of the present invention has a feature that the number of parts is small as a whole and the assembling work is easy. The shaft 29, the elastic block 22 and the holder member 23 may be bonded to each other, but if they are not bonded, these parts may be manufactured in a separate process and simply fitted, so that vulcanization bonding There is also an effect that it can be manufactured at a lower cost as compared with the case of performing such operations. It is preferable that the elastic block 22 is adjusted to have such a size that the elastic block 22 grips the shaft 29 with elasticity and the holder member 23 is configured to elastically grip the elastic block 22 so that they do not separate and fall off during the construction work. In addition, as described above, there is an effect that the partition wall softly follows the vibration in all directions and exerts an appropriate vibration damping effect on all the vibrations except for the vibration in the longitudinal direction of the shaft 29.

Next, a test for verifying a specific effect of the above-described vibration damping device and a result thereof will be described. The elastic block 22 shown in FIG. 1 has an outer diameter of 65 mm, an inner diameter of 22 mm,
A 30 mm high cylindrical chloroprene rubber was used. The spring constant of the rubber was 218 N / mm. The holder member 23 shown in FIG. 1 was made of steel having a width of 40 mm and a thickness of 4.5 mm. Shaft is 22mm in outer diameter and 80mm in length
Made of steel. The holder member 23 and the shaft 31 were subjected to electro-galvanized colored chromate treatment (rust prevention treatment).

FIG. 4 is a graph showing the results of measuring the spring constant of the vibration isolator of the present invention. The above components were assembled as shown in FIG. 1B, and the total spring constant in the X and Y directions shown in FIG. 1A was obtained. Point Px and point Py in FIG.
Corresponds to the total spring constant points Kx and Ky in the X direction and the Y direction, respectively. When a load of 1600 N was applied in any of these directions, no breakage or irregular deformation of the rubber was observed.

[0033]

As described above, the vibration isolator according to the present invention has little directionality, and exhibits a high vibration damping effect by following softly large deformations in the X and Y directions. Therefore, the lateral vibration of the room surrounded by the partition wall 20 is flexibly absorbed, and the shock to the lateral vibration of the earthquake is reduced. In addition, it can follow a large vertical swing of the room without any resistance.

[Brief description of the drawings]

1A and 1B show an example of a vibration isolator of the present invention, in which FIG. 1A is an exploded perspective view, and FIG. 1B is a side view when the vibration isolator is mounted on a partition.

FIG. 2 shows an example of a conventional anti-vibration anti-vibration device,
(a) is a longitudinal sectional view of a room surrounded by a partition having a double structure for insulating vibration, (b) is a longitudinal sectional view of a vibration isolator portion,
(C) is a longitudinal sectional view of a vibration isolator of another structure.

3A and 3B are component diagrams of the vibration isolator shown in FIG. 1, wherein FIG. 3A is a plan view of an elastic block, FIG. 3B is a longitudinal sectional view of the elastic block, and FIG. (D) is a side view of the holder member, (e) is a longitudinal sectional view of the shaft,
(F) is a top view of the shaft.

FIG. 4 is a graph showing spring constant measurement results of the vibration isolator of the present invention.

[Explanation of symbols]

 20 One of the partition walls 21 The other of the partition walls 22 Elastic block 23 Holder member 24 Bolt 25 Bracket 26 Shaft fixing member 27 Bolt (holder fixing member)

Continuing from the front page (72) Inventor Koichi Sugiyama 1-11-11 Shiba, Minato-ku, Tokyo Nippon Sheet Glass Environmental Amenity Co., Ltd. (72) Inventor Politics 1-11-11 Shiba, Minato-ku, Tokyo Nippon Sheet Glass Environment Inside Amenity Co., Ltd. (72) Inventor Naoki Kato 2-1-1, Oda Sakae, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Inside Showa Electric Wire & Cable Co., Ltd. (72) Ikuko Sada, 2-1-1 Oda Ei, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture No. 1 Inside Showa Electric Wire & Cable Co., Ltd. (72) Inventor Yasuhito Iwamoto 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Inside Showa Electric Wire & Cable Co., Ltd. (72) Inventor Toshiya Shimazaki Oda, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture 2-1-1, Sakae Showa Electric Wire & Cable Co., Ltd. F-term (reference) 3J048 AA01 BA05 BA19 BB02 DA01 DA04 EA38

Claims (5)

[Claims] 1. An elastic block made of a rubber-like elastic body, which is mounted between partition walls for insulating vibration, and a shaft penetrating the elastic block and projecting at least one end at a predetermined length. A holder member that surrounds the elastic block, a shaft fixing member that fixes the shaft to one of the partition walls, and a holder fixing member that fixes the holder member to the other of the partition walls. Anti-vibration device. 2. The vibration isolator according to claim 1, wherein the shaft protrudes from both sides of the elastic block by a predetermined length, and both ends of the shaft are fixed to one of the partition walls by the shaft fixing member. A vibration isolator characterized by the above-mentioned. 3. The vibration isolator according to claim 1, wherein the elastic block grips the shaft with elasticity, and the shaft and the elastic block are not adhered. Anti-vibration device. 4. The vibration isolator according to claim 1, wherein the holder grips the elastic block with elasticity, and the holder and the elastic block are not adhered. Anti-vibration device. 5. The vibration isolator according to claim 1, wherein the elastic block has a cylindrical shape, and the shaft penetrates a shaft portion of the elastic block, and the holder member extends over a side surface of the elastic block by half or more. A surrounding curved portion, wherein the shaft is disposed so as to be substantially perpendicular to the floor of the building having the partition, and the vertical load of the partition is caused by another member on the floor of the building. An anti-vibration device characterized by being supported.