TWI679330B - Seismic vibration control device - Google Patents

Abstract

Provided is a shock-proof device that reduces the tensile force transmitted to a laminated rubber with a simple structure.

The anti-vibration device includes: an upper flange portion and a lower flange portion, which are provided on both end surfaces of the laminated rubber; a through-hole, which is formed on the lower flange portion; A small diameter is required for fixing to the mounting surface on which the lower flange portion is mounted; and a guide member is disposed between the fixing member and the through hole, and restricts the lateral relative displacement between the mounting surface and the lower flange portion, and allows longitudinal Relative displacement.

Description

Anti-vibration device

The invention relates to an earthquake-proof device for earthquake-proof buildings.

In the past, earthquake-proof devices for building earthquakes were installed at the base and supported the building. During an earthquake, the laminated rubber was deformed to absorb lateral vibration (vibration energy) transmitted from the base to the building. Although the laminated rubber has a relatively large strength against the compressive force, it has a relatively small strength against the upward pulling force (tensile force). Therefore, when the shockproof device is subjected to the pulling force, the layer may Possibility of decrease in shock resistance of rubber. Therefore, it is necessary to use a structure in which the pulling force does not act on the shock-proof device.

On the other hand, in recent years, buildings with relatively large lengths and widths (such as high-rise buildings having a large ratio of height to width) have increased. In buildings with relatively large lengths and widths, the entire building is likely to sway (swing) from side to side during earthquakes or strong winds. When the swing occurs, one side of the building will float from the base, so that the pulling force acts on the anti-vibration device. Since then, a shock-proof device that can be used even with the pulling force is required.

When the drawing force acts on the shock-proof device, a technique for reducing the tensile force transmitted to the laminated rubber is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-194146.

Japanese Patent Application Laid-Open No. 2003-194146 describes a configuration in which a pull-out force reduction mechanism is penetrated when a shock-proof device is installed in a base portion, and a lower flange portion is attached to the base portion by a fixing bolt. Thereby, when a pulling force occurs during an earthquake, the pulling force is received and the shock-proof device is displaced upward. That is, upward displacement of the shock-proof device is allowed by the pulling force reduction mechanism. As a result, the tensile force experienced by the laminated rubber is reduced, and an excessive tensile force is prevented from being transmitted to the laminated rubber. In addition, by fixing the bolt, the lateral movement of the shock-proof device and the base portion is suppressed.

Here, the drawing force reduction mechanism is provided with a head provided with a fixing bolt and a leaf spring provided between the lower flange portions. The leaf spring has a smaller elastic coefficient than that of the laminated rubber. Further, a support plate and a guide member are provided under the lower flange portion to suppress a rotational force or a shear force acting on the shock-proof device.

However, the anti-vibration device of Japanese Patent Application Laid-Open No. 2003-194146 increases the cost due to the complicated structure.

The present invention has been made in view of the above-mentioned facts, and an object thereof is to provide a vibration-proof device that can be simply structured to reduce the tensile force transmitted to the laminated rubber.

A shockproof device according to a first aspect of the present invention includes a flange portion provided on both end surfaces of a laminated rubber, a through hole formed in the flange portion, and a fixing member inserted into the through hole, and Fixed to the mounting surface on which the flange portion is mounted with a smaller diameter than the through hole; and a guide member disposed between the fixing member and the through hole and restricting the mounting surface and the flange portion Relative lateral displacement, while allowing longitudinal relative displacement.

According to the anti-vibration device of the first aspect, the through-hole formed in the flange portion of the anti-vibration device is inserted with a fixing member fixed to the mounting surface, and a guide member is disposed between the fixing member and the through-hole. With this guide member, the lateral relative displacement between the mounting surface and the flange portion is restricted, and the longitudinal relative displacement is allowed.

That is, the lateral movement of the guide member is restricted by the fixing member, and the lateral movement of the flange portion is restricted by the guide member. As a result, the laminated rubber will be sheared to exert the anti-vibration function.

In addition, since the longitudinal relative displacement between the flange portion and the mounting surface is allowed by the guide member, the flange portion is separated from the mounting surface when a pulling force is applied to the shock-proof device. As a result, the tensile force transmitted to the laminated rubber can be reduced.

The second aspect of the present invention is the anti-vibration device of the first aspect, wherein the fixing member has a head having a larger diameter than the inner dimension of the guide member and smaller than the through hole.

According to the shockproof device of the second aspect, since the diameter of the head of the fixed member is larger than the inner size of the guide member, the guide member does not fall off from the fixed member. In addition, since the diameter of the head of the fixing member is smaller than that of the through hole, the guide member can be pulled out from the through hole when a longitudinal relative displacement occurs between the mounting surface and the flange portion. That is, the guide member is relatively movable relative to the through-hole In portrait.

As a result, the flange portion can be separated from the mounting surface in a state where the guide member is fixed to the mounting surface when the drawing force is applied to the anti-vibration device.

A third aspect of the present invention is an anti-vibration device according to the first aspect or the second aspect. The guide member is formed in a hollow cylindrical shape, and the outer peripheral surface is in contact with the inner peripheral surface of the through hole. , And can be inserted slidably in the direction of the axial center of the through hole.

According to the anti-vibration device according to the third aspect, the guide member is slidably inserted in the direction of the axial center of the through hole, and allows longitudinal relative displacement between the mounting surface and the flange portion. This allows the flange portion to be separated from the mounting surface when the pulling force is applied to the shock-proof device. Moreover, since the outer peripheral surface of the guide member formed in a hollow cylindrical shape is brought into contact with the inner peripheral surface of the through hole of the flange portion, the mounting surface and the flange portion can be displaced in the lateral direction as a whole.

A fourth aspect of the present invention is the anti-vibration device according to any one of the first to third aspects, and the contact portion between the through hole and the guide member is provided with a frictional force reducing friction reducing mechanism.

According to the fourth aspect of the anti-vibration device, the friction force of the contact portion between the through hole and the guide member is reduced by the friction force reduction mechanism provided at the contact portion. This allows the flange portion to be smoothly separated from the mounting surface when the drawing force is applied to the shockproof device.

A fifth aspect of the present invention is the anti-vibration device according to any one of the first to fourth aspects. The size of the guide member along the direction of the axis of the through hole is larger than that of the flange The thickness dimension should be large.

This makes it possible to make it difficult for the flange portion to be detached from the guide member when the pull-out force acts on the shockproof device and the flange portion is separated from the mounting surface. As a result, the flange portion can be easily returned to the initial position.

A sixth aspect of the present invention is the anti-vibration device according to the fifth aspect, wherein the head of the guide member protruding from the flange portion has a larger diameter than the through hole of the flange portion. Of the protrusion.

Thereby, when the pulling force is applied to the shock-proof device, the upward displacement of the flange portion can be restricted by the protruding portion. As a result, the flange portion can be prevented from being removed from the guide portion.

A seventh aspect of the present invention is the anti-vibration device of the sixth aspect, wherein the protruding portion is formed with a groove portion that allows the protruding portion to be separated from the guide member when a pulling force of more than a set value is received. .

According to the seventh aspect of the anti-vibration device, when the protruding portion receives a pulling force of more than a set value, the protruding portion is separated from the guide member at the groove portion. Thereby, application of excessive tensile force to the laminated rubber can be suppressed.

An anti-vibration device according to an eighth aspect of the present invention is the anti-vibration device according to the sixth aspect, and the head of the fixing member is formed so that when the head receives a pulling force greater than a set value, the head is driven The groove portion where the shaft portion of the fixing member is separated.

According to the anti-vibration device of the eighth aspect, when a pulling force of more than a set value is received, the head of the fixing member is separated from the shaft portion of the fixing member at the groove position. Thereby, application of excessive tensile force to the laminated rubber can be suppressed.

According to a ninth aspect of the present invention, the anti-vibration device is the anti-vibration device of any one of the first to eighth aspects, and the joint surface between the through hole of the flange portion and the guide member is along the through hole. The direction of the hole axis is inclined toward the mounting surface where the flange portion is mounted in a direction having a larger diameter.

According to the anti-vibration device according to the ninth aspect, the joint surface between the through hole of the flange portion and the guide member is inclined in a direction in which the mounting surface has a larger diameter. Thereby, for example, by making the inclination angle correspond to the inclination angle of the building when the swing occurs, it is possible to easily separate the flange portion from the mounting surface when the drawing force acts on the shock-proof device.

Since the present invention has the above-mentioned configuration, it is possible to provide a shock-proof device that can be simply structured to reduce the tensile force transmitted to the laminated rubber.

10‧‧‧ Shockproof device

12‧‧‧Laminated rubber

12G‧‧‧Elastic rubber sheet

12S‧‧‧ steel plate

14a‧‧‧Lower flange

14b‧‧‧upper flange

16‧‧‧ base plate

16F‧‧‧ above

18‧‧‧ Basic Department

20‧‧‧ Building

20F‧‧‧ Underside

22‧‧‧ Bolt

23‧‧‧ fixing bolt

24‧‧‧ Guide Insertion Hole

24F‧‧‧Inner peripheral surface

26‧‧‧Guide

30‧‧‧Shockproof device

32‧‧‧Guide

40‧‧‧Shockproof device

42‧‧‧Guide

44‧‧‧ protrusion

50‧‧‧ shockproof device

52‧‧‧Guide

54‧‧‧ protrusion

56‧‧‧Gully

58‧‧‧Ring section

60‧‧‧Shockproof device

62‧‧‧ Bolt

64‧‧‧ Head

66‧‧‧Shaft

68‧‧‧Gully

70‧‧‧ shockproof device

72‧‧‧Guide

72F‧‧‧outer surface

D1‧‧‧ diameter

D2‧‧‧ Outside diameter

D3‧‧‧Inner diameter

H1‧‧‧ height

H2‧‧‧height size

H3‧‧‧ Depth

H4‧‧‧ Depth

L1‧‧‧ The size of the enlarged part of the small diameter side and the large diameter side of the tapered surface

L2‧‧‧ cone height

T1‧‧‧Thickness

UP‧‧‧ Arrow

S1‧‧‧ separation distance

S2‧‧‧Distance

S3‧‧‧ Distance

Sv‧‧‧ Pulling Force

Svk‧‧‧Drawing Force

Y‧‧‧ vertical axis

FIG. 1A is a front view showing a basic configuration of a vibration-proof device according to a first embodiment of the present invention.

FIG. 1B is an enlarged partial cross-sectional view of a joint portion between a base portion and a flange portion of an anti-vibration device according to a first embodiment of the present invention. FIG.

FIG. 2A is a partial cross-sectional view showing a state where a lateral external force is applied to a base portion of a vibration isolator according to a first embodiment of the present invention.

FIG. 2B is a partial cross-sectional view showing a state where an upward pulling force is applied to the shock-proof device according to the first embodiment of the present invention. FIG.

FIG. 3A is a partial cross-sectional view showing a joint between a base portion and a flange portion showing a basic configuration of a vibration-proof device according to a second embodiment of the present invention.

FIG. 3B is a partial cross-sectional view showing a state in which an upward pulling force is applied to the shock absorbing device according to the second embodiment of the present invention.

FIG. 4A is a partial cross-sectional view showing a joint portion of a base portion and a flange portion showing a basic configuration of a vibration-proof device according to a third embodiment of the present invention.

FIG. 4B is a partial cross-sectional view showing a state where an upward pulling force is applied to the shock-proof device according to the third embodiment of the present invention.

FIG. 5A is a partial cross-sectional view showing a joint between a base portion and a flange portion showing a basic configuration of a vibration-proof device according to a fourth embodiment of the present invention.

FIG. 5B is a partial cross-sectional view showing a state in which an upward pulling force is applied to the shock absorbing device according to the fourth embodiment of the present invention.

FIG. 6A is a partial cross-sectional view showing a joint portion of a base portion and a flange portion showing a basic configuration of a vibration-proof device according to a fifth embodiment of the present invention. FIG.

FIG. 6B is a partial cross-sectional view showing a state where an upward pulling force is applied to the shock-proof device according to the fifth embodiment of the present invention.

FIG. 7A is a partial cross-sectional view showing a joint portion of a base portion and a flange portion showing a basic configuration of a vibration-proof device according to a sixth embodiment of the present invention.

FIG. 7B is a partial cross-sectional view showing a state in which a vibration-proof device according to a sixth embodiment of the present invention exerts an upward pulling force. FIG.

(First Embodiment)

The vibration-proof device 10 according to the first embodiment will be described with reference to Figs. 1 and 2.

As shown in FIG. 1A, the anti-vibration device 10 is installed in the base portion 18 and supports the building 20. During an earthquake, it absorbs shaking (vibration energy) transmitted from the base portion 18 to the building 20.

In addition, all drawings in this specification are described with the direction of the arrow UP as an upward direction.

The anti-vibration device 10 is a general structure that is quite popular in the market. Laminated rubber 12 is provided at the center of the vertical direction. The lower flange portions 14a and the upper diameter of the laminated rubber 12 are larger than those of the laminated rubber 12. The flange portion 14b. Here, the lamination of 12-layer laminated rubber has a predetermined structure. The elastic rubber plate 12G and the steel plate 12S are formed in a cylindrical shape (see FIG. 1 (B)).

Both the lower flange portion 14a and the upper flange portion 14b are formed in a circular shape by a steel plate in a plan view. The lower flange portion 14a is in contact with the upper surface 16F of the base plate 16 embedded in the base portion 18 as a mounting surface, and is used as The member is fixed with a bolt 22. Here, the base plate 16 is formed in a circular shape by a steel plate in a plan view, the bottom portion is buried in the cement-based base portion 18, and the base portion 18 is joined with the fixing bolt 23. The base plate 16 and the base portion 18 operate together. The upper flange portion 14 b is in contact with the bottom surface (mounting surface) 20F of the building 20 and is fixed with bolts 22. The upper flange portion 14 b operates together with the building 20.

Here, the joint between the base plate 16 and the lower flange portion 14a will be described.

As shown in FIG. 1B, a plurality of guide insertion holes 24 penetrating with a diameter D1 are formed at a regular interval from the flat portion of the lower flange portion 14 a protruding from the outer peripheral surface of the laminated rubber 12. The upper surface of the base plate 16 is provided with a bolt guide hole 28 for locking the bolt 22 at a position corresponding to the guide insertion hole 24.

The guide insertion hole 24 has a guide 26 as a guide member inserted between the outer peripheral surface of the bolt 24 and the inner peripheral surface of the guide insertion hole 24. The outer peripheral surface of the guide 26 is in contact with the inner peripheral surface of the guide insertion hole 24 and is slidably inserted in the longitudinal direction. The guide 26 is formed into a hollow cylindrical shape using steel material, the outer diameter D2 is a size that can be inserted into the guide insertion hole 24, and the inner diameter D3 is a size that allows the shaft portion of the bolt 22 to be inserted. The height H1 is a size that is almost equal to the thickness dimension T1 of the lower flange portion 14a.

This allows the lower flange portion 14 a to be separated from the mounting surface F of the base plate 16 when the drawing force Sv acts on the shock-proof device 10. Moreover, the lateral relative displacement between the mounting surface F and the lower flange portion 14a is restricted by the outer peripheral surface of the contacting guide 26 and the inner peripheral surface of the guide insertion hole 24 of the lower flange portion 14a.

Here, the restriction of the relative displacement is a relative displacement that allows a dimensional error between the mounting surface 16F of the base plate and the lower flange portion 14a required in accordance with the construction of the seismic isolation device 10, and lateral shaking during an earthquake or the like At this time, the meaning that the mounting surface 16F and the lower flange portion 14a operate together is described.

The guide 26 is connected to the base plate 16 with bolts 22. The outer diameter of the head of the bolt 22 will be larger than the inner diameter D3 of the guide member 26 and smaller than the diameter D1 of the guide member insertion hole 24. As a result, the head of the bolt 22 will apply a pressing force on the guide member 26 to fix the guide member 26. Scheduled for mounting surface 16F.

In addition, since the diameter of the head of the bolt 22 is smaller than that of the guide insertion hole 24, the longitudinal relative displacement between the mounting surface 16F and the lower flange portion 14a is allowed.

As a result, the lower flange portion 14a can be separated from the mounting surface in a state where the guide 26 is fixed to the mounting surface 16F when the drawing force is applied to the shockproof device 10.

As shown in FIG. 2A, by this, for example, when the base portion 18 and the base plate 16 are moved laterally due to an earthquake, the bolts 22 are moved laterally together with the base plate 16. As a result, the guide 26 inserted into the guide insertion hole 24 and the lower flange portion 14 a of the shock-absorbing device 10 also move in the direction of the arrow Sh together with the bolt 22.

On the other hand, since the upper flange portion 14b has not moved from the previous position, the laminated rubber 12 will be inclined obliquely as shown by the two-point chain line Sm to absorb the lateral direction transmitted from the base portion 18 to the building 20 Vibration energy.

In this way, in this embodiment, the function of absorbing the lateral shaking (vibration energy) in the shockproof device 10 can be maintained.

Further, as shown in FIG. 2B, when the building is tilted due to shaking, the upward-side pulling-out force Sv acts on the anti-vibration device 10 on the lifting side.

At this time, since the anti-vibration device 10 fixes the upper flange portion 14 b to the building 20, it is moved together with the building 20 due to a pulling force. On the other hand, the lower flange portion 14 a of the shock-absorbing device 10 slides between the guide member 26 inserted into the guide insertion hole 24, and the lower flange portion 14 a is separated from the base plate 16 fixed to the base portion 18. The distance S1, and moves upward with the laminated rubber. As a result, the lower end portion of the laminated rubber 12 becomes a free end, and the tensile force transmitted to the laminated rubber 12 is reduced.

As described above, in this configuration, the guide 26 having a simple configuration is used, and even if the drawing force is applied to the shockproof device 10, the tensile force transmitted to the laminated rubber 12 can be reduced.

In addition, in the anti-vibration device 10, the contact portion between the guide insertion hole 24 and the guide 26 of the lower flange portion 14a may be coated with a friction reducing substance such as molybdenum disulfide, silicone oil, or lubricant (reduced friction) Mechanism) to reduce friction. Take this. The lower flange portion 14a can be easily slid upward.

In the present embodiment, a configuration has been described in which a guide insertion hole 24 is provided in the lower flange portion 14 a and a guide 26 is inserted into the guide insertion hole 24. However, it is not limited Here, although illustration is omitted, the upper flange portion 14b may be provided with a screw hole instead of the lower flange portion 14a, and a guide may be inserted into the guide insertion hole 24. It is also possible to have a configuration in which both the lower flange portion 14 a and the upper flange portion 14 b are inserted into the guide to the guide insertion hole 24.

In the present embodiment, the case where the guide 26 is formed into a hollow cylindrical shape has been described. However, the shape is not limited to this, and although the illustration is omitted, the outer shape may be a shape other than a circle such as a square or a polygon. Moreover, slits may be provided at a fixed interval in a part of the cylindrical portion.

In addition, the guide member 26 does not have to be formed integrally and continuously in a hollow cylindrical portion in the peripheral direction, and may be divided in a direction along the center line of the hollow cylinder, and a plurality of divided pieces may be combined. Alternatively, a steel ball of a predetermined diameter may be filled instead of the guide.

In this embodiment, the guide 26 and the bolt 22 have been described as different members. However, it is not limited to this, and the guide 26 and the bolt 22 may be integrated first. Thereby, the steps at the time of mounting the lower flange part 14a can be omitted, and workability can be improved.

(Second Embodiment)

3A and 3B, a description will be given of an anti-vibration device 30 according to the second embodiment.

As shown in FIG. 3A, the shockproof device 30 is different from the first embodiment in that the longitudinal dimension (height) H2 of the guide 32 is larger than the thickness dimension T1 of the lower flange portion 14a. The description will focus on the differences.

The guide 32 is slidably inserted into the guide insertion hole 24 formed in the lower flange portion 14a. At this time, since the height dimension H2 of the guide 32 is larger than the thickness dimension T1 of the lower flange portion 14a, the upper end portion of the guide 32 protrudes from the surface of the lower flange portion 14a. The guide 32 is fixed to the base plate 16 by pressing the upper surface of the guide 32 with the head of the bolt 22.

Therefore, as shown in FIG. 3B, when the upward pulling force Sv acts on the shockproof device 30, the lower flange portion 14a is separated from the mounting surface 16F of the base plate 16, but the height of the guide 32 is high, Therefore, the guide insertion hole 24 of the lower flange portion 14 a can be made difficult to be detached from the guide 32. For example, even if the lower flange portion 14a is separated from the mounting surface F to the distance S2, it does not come off. In addition, the guide 32 does not fall off from the bolt 22. Further, the lower flange portion 14 a can easily return to the initial position in contact with the mounting surface 16F of the base plate 16.

As a result, even if the drawing force Sv is repeatedly applied, the tensile force transmitted to the laminated rubber 12 can be stably reduced. The rest of the configuration is the same as that of the first embodiment, and description thereof is omitted.

(Third Embodiment)

A description will be given of a shock-proof device 40 according to the third embodiment with reference to Figs. 4A and 4B.

As shown in FIG. 4A, the shockproof device 40 is different from the second embodiment in that the head of the guide 42 protruding from the surface of the lower flange portion 14a has a protruding portion 44. The description will focus on the differences.

The guide 42 has a height that protrudes from the surface of the lower flange portion 14a, and the head portion protrudes in a peripheral direction with a projection having a larger diameter than the guide insertion hole 24 of the lower flange portion 14a. Further, the longitudinal dimension H2 from the guide 42 to the lower surface of the protruding portion is larger than the thickness dimension T1 of the lower flange portion 14a.

As a result, as shown in FIG. 4B, when the upward pulling force Sv acts on the shockproof device 40, the lower flange portion 14 a is separated from the mounting surface 16F of the base plate 16, but the lower portion 14 a The width of the flange portion 14a in the longitudinal direction is limited to the range of the distance S3. As a result, detachment of the lower flange portion 14 a from the guide 42 can be suppressed. The rest of the configuration is the same as that of the second embodiment, and description thereof is omitted.

(Fourth Embodiment)

5A and 5B, a vibration-proof device 50 according to the third embodiment will be described.

As shown in FIG. 5A, the shockproof device 50 is different from the third embodiment in that a groove portion 56 is formed on the upper surface of the guide 52 where the protruding portion 54 is formed. The description will focus on the differences.

The upper portion of the guide member 52 is provided with a protrusion 54 having a larger diameter than the guide member insertion hole 24. Further, a circular groove portion 56 is formed on the protruding portion 54 with an outer diameter D2 that is the same as the outer diameter of the ring portion 58 of the guide 52. The groove portion 56 is a V-shaped cutout recess with a depth H3. The depth H3 of the groove portion 56 is a depth at which the protrusion portion 54 can be cut away from the upper portion of the guide 52 when the protrusion portion 54 is subjected to a drawing force Svk.

As a result, as shown in FIG. 5B, when the upward pulling force Sv acts on the shock-proof device 50, although the lower flange portion 14a is separated from the mounting surface 16F of the base plate 16, the shock-proof device 50 is subjected to greater pulling When the pulling force Svk is drawn, the lower flange portion 14a is separated from the mounting surface 16F by a distance Sk, and the ring portion 58 of the guide 52 is broken at the groove portion 56 so that the protruding portion 54 is separated from the ring portion 58.

As a result, it is possible to suppress application of an excessive tensile force (tensile force greater than Svk) to the laminated rubber 12. The rest of the configuration is the same as that of the third embodiment, and description thereof is omitted.

(Fifth Embodiment)

6A and 6B, a vibration-proof device 60 according to the sixth embodiment will be described.

As shown in FIG. 6A, the shockproof device 60 is a guide portion 42 provided with a protruding portion 44, and a bolt 62 that fixes the guide portion 42 to the base plate 16 forms a groove portion for separating the head portion 64 from the shaft portion 66. The 68 points are different from the third embodiment. The description will focus on the differences.

The bolt 62 includes a shaft portion 66 inserted into the guide 42 and a head portion 64 having a larger diameter than the inner diameter of the guide 42. A groove portion 68 is formed in a joint portion that is the shaft portion 66 of the bolt 62 and is joined to the head portion 64. The groove portion 68 is formed around the shaft portion 66 with a depth H4. Here, the depth H4 of the groove portion 68 is a depth at which the head portion 64 can be cut away from the shaft portion 66 when the head portion 64 receives a drawing force Svk of a set value or more.

As a result, as shown in FIG. 6B, when the upward pulling force Sv acts on the shock-proof device 60, the lower flange portion 14a is separated from the mounting surface 16F of the base plate 16, but the shock-proof device 50 is being pulled more. When the pulling force Svk is drawn, the lower flange portion 14a is separated from the mounting surface 16F by a distance Sk, and the shaft portion 66 is broken at the groove portion 68, so that the head portion 64 is separated from the shaft portion 66.

As a result, it is possible to suppress application of an excessive tensile force (tensile force greater than Svk) to the laminated rubber 12. The rest of the configuration is the same as that of the third embodiment, and description thereof is omitted.

(Sixth embodiment)

7A and 7B, a vibration-proof device 70 according to the seventh embodiment will be described.

As shown in FIG. 7A, the shock-proof device 70 is formed on the outer peripheral surface 72F of the guide 72 and the inner peripheral surface 24F of the guide insertion hole 24 of the lower flange portion 14a. The point where they meet each other is different from the first embodiment. The description will focus on the differences.

The outer peripheral surface 72F of the guide 72 and the inner peripheral surface 24F of the guide insertion hole 24 of the lower flange portion 14a are both the mounting surface 16F side of the base surface 16 on which the lower flange portion 14a is mounted. The direction in which the diameter is larger is inclined, that is, the angle relative to the vertical axis angle θ. The outer peripheral surface 72F and the inner peripheral surface 24F are in contact with each other while being inclined at an angle θ.

As a result, as shown in FIG. 7B, when the pulling force Sv acts on the shock-proof device 10, the lower flange portion 14 a is separated from the mounting surface 16F of the base plate 16 by a distance S1. As a result, the tensile force transmitted to the laminated rubber 12 can be reduced.

In addition, the angle θ is the inclination angle when the building 20 oscillates. The size of the enlarged portion of the small diameter side and the large diameter side of the tapered surface is L1, and the height of the tapered surface is L2. About 1/500 to 1/50 (see Fig. 7B). In addition, although the present embodiment has been described as an example of application to the first embodiment, it is not limited to this, and may be applied to the second to fifth embodiments.

Claims (6)

An anti-vibration device includes: a flange portion provided on both end surfaces of a laminated rubber; a through hole formed on the flange portion; a fixing member inserted into the through hole and smaller than the through hole And a guide member disposed between the fixing member and the through hole, and restricting a lateral relative displacement between the mounting surface and the flange portion, and Allow longitudinal relative displacement; the size of the guide member along the direction of the through-hole axis will be larger than the thickness of the flange portion; the head of the guide member protruding from the flange portion has a diameter protruding in the radial direction The protruding portion is larger than the through hole of the flange portion; the protruding portion is formed with a groove portion that allows the protruding portion to be separated from the guide member when the pulling force is greater than a set value. For example, the shockproof device of the first patent application range, wherein the fixing member has a head having a diameter larger than the inner size of the guide member and smaller than the through hole. For example, the shockproof device of the scope of patent application, wherein the guide member is formed in a hollow cylindrical shape, and the outer peripheral surface is in contact with the inner peripheral surface of the through hole, and can be slid along the direction of the axial center of the through hole. Was inserted. For example, the shockproof device according to any one of claims 1 to 3, wherein a contact portion between the through hole and the guide member is provided with a friction reducing mechanism for reducing friction. For example, the shockproof device of the scope of application for a patent, wherein the head of the fixed member is formed with a groove portion that separates the head from the shaft of the fixed member when the head is subjected to a pulling force greater than a set value. . The shockproof device according to any one of claims 1 to 3, wherein a joint surface of the through hole of the flange portion and the guide member is installed in a direction relative to a direction along the axis of the through hole. The mounting surface of the flange portion is inclined in a direction having a larger diameter.