TWI675971B - Seismic device - Google Patents

Abstract

The invention provides a vibration damping device that can effectively exert the attenuation function of vibration when the displacement of the vibration is large and small.
The vibration damping device (10) is provided by a structure (1) including a lower side beam portion (2) and an upper side beam portion (3). The vibration damping device (10) is provided with a viscous damper (11), a friction damper (30), and switching between the attenuation of vibrations independently performed by the viscous damper (11) and the viscous damper (11) A switching mechanism (40) for damping vibration in combination with a friction damper (30). The switching mechanism (40) includes a first member (41) provided in the viscous fluid container (12), and a friction transmission plate (31) opposite to a horizontal movement direction of the first member (41), and When the displacement in the horizontal direction of the viscous fluid container (12) relative to the friction transmitting plate (31) exceeds the first predetermined interval (L1), the friction transmitting plate (31) is brought into contact with the first member (41). ) A second member (42) that moves horizontally with the viscous fluid container (12).

Description

Vibration damping device

The present invention relates to a vibration damping device provided in a structure including a lower side beam portion and an upper side beam portion.

Conventionally, in a structure such as a building, a vibration damping device that attenuates vibrations in the horizontal direction is provided in order to improve the vibration damping property. For example, in a building, a vibration damping device is provided between a lower side beam portion and an upper side beam portion extending in a horizontal direction.

This vibration damping device is known to have a composite vibration damping device, which is provided with a viscous damper that attenuates vibrations in the horizontal direction using a viscous fluid with viscous force, and a viscous damper Lead-type vibration-isolating rubber is a historical damper that attenuates vibrations in the horizontal direction (for example, refer to Patent Document 1).

The vibration damping device of Patent Document 1 is composed of a viscous damper and a history-type damper. The viscous damper includes: a viscous fluid container provided on the lower side beam portion; and a viscous fluid stored in the viscous fluid container; and a viscous fluid container suspended from the upper side beam portion and immersed in the viscous fluid. A resistance plate for horizontal movement. The history-type damper includes a lead-core vibration isolation rubber whose one end surface is fixed to a resistance plate, and a fixing plate which fixes the other end surface of the lead-core vibration isolation rubber and the outer surface of the viscous fluid container.

When the vibration in the horizontal direction acts on the building, the viscous fluid container vibrates in the horizontal direction relative to the resistance plate. In the viscous damper, the viscous fluid between the inner surface of the viscous fluid container and the resistance plate attenuates the vibration of the viscous fluid container in a horizontal direction relative to the resistance plate. In the history type damper, the vibration in the horizontal direction of the viscous fluid container relative to the resistance plate is attenuated through the lead-core vibration-isolating rubber between the outer surface of the viscous fluid container and the resistance plate through the fixed plate.

[Prior technical literature]
[Patent Literature]

Patent Document 1: Japanese Patent Application Laid-Open No. 2001-248326

[Problems to be Solved by the Invention]

According to the vibration damping device of Patent Document 1, the viscous damper and the history damper are provided. However, compared with the viscous damper, the history type damper is harder (even with a small displacement and a large load). Although it can exert the attenuation function when the displacement of the vibration is large (heavy load), (Small load) will not deform and will not attenuate vibration. Therefore, when a viscous damper and a history damper are provided in parallel, the attenuation performance decreases when the displacement of the vibration is small.
An object of the present invention is to provide a vibration damping device that can effectively exert a vibration damping function when the displacement of a vibration is large and small in view of the problems of the prior art.

[Means to solve the problem]

[1] A vibration damping device according to a first aspect of the present invention,
It is a vibration damping device provided by a structure including a lower side beam portion and an upper side beam portion, and is characterized in that the vibration damping in the horizontal direction of the lower side beam portion and the upper side beam portion is attenuated by an adhesive force. A viscous damper coupled to the viscous damper, and a friction damper that attenuates vibrations of the lower side beam portion and the upper side beam portion in a horizontal direction by friction, and switches the viscous damper A switching mechanism for the attenuation of the vibration performed alone and the attenuation of the vibration performed by a combination of the aforementioned viscous damper and the aforementioned friction damper;
The viscous damper includes a viscous fluid container fixed to the lower side beam portion, a viscous fluid stored in the viscous fluid container, and hanging down and immersed in a state of being fixed to the upper side beam portion. A resistance plate for moving said viscous fluid horizontally relative to said viscous fluid container;
The friction damper includes a friction transmission plate that is horizontally movable with respect to the resistance plate, and a friction force generating portion provided between the friction transmission plate and the resistance plate of the viscous damper;
The switching mechanism includes: a first member provided on the viscous fluid container; and a second member provided on the friction transmitting plate opposite to a horizontal moving direction of the first member; and when the viscous fluid container is opposed to When the horizontal displacement of the friction transmitting plate exceeds a first predetermined interval between an end portion in the horizontal direction of the first member and an end portion of the second member opposite to the end portion, the friction transmission plate abuts against The first member moves the friction transmitting plate and the viscous fluid container relatively horizontally with respect to the resistance plate.

According to the vibration damping device of this configuration, the vibration in the horizontal direction of the lower side beam portion and the upper side beam portion can be damped by the viscous damper and the friction damper. Specifically, on the viscous damper side, when the resistance plate hanging down in a state of being fixed to the upper side beam portion moves horizontally with respect to the viscous fluid container fixed to the lower side beam portion, it is stored in the viscous The viscous fluid of the fluid container attenuates the vibration of the resistance plate in the horizontal direction relative to the viscous fluid container.

In addition, on the friction damper side, when the friction transmitting plate moves in a horizontal direction relative to the resistance plate, the friction force generating portion provided between the friction transmitting plate and the resistance plate makes the resistance plate relative to the friction transmitting plate. Vibration attenuation in the horizontal direction. Here, the switching mechanism, when the displacement of the viscous fluid container in the horizontal direction with respect to the friction transmitting plate exceeds the end of the first member in the horizontal direction and the end of the second member that is similar to the end, 1 At a predetermined interval, the first member provided in the viscous fluid container abuts the second member provided in the friction transmitting plate, and the friction transmitting plate and the viscous fluid container are moved in the horizontal direction together.

Therefore, when the displacement of the vibration is small and the horizontal displacement of the viscous fluid container relative to the friction transmitting plate is equal to or less than the first predetermined interval, the first member does not contact the second member, and the friction transmitting plate does not move horizontally. Therefore, the friction damper does not work, only the viscous damper works effectively. In addition, when the displacement of the vibration increases and the relative displacement of the viscous fluid container with respect to the friction transmitting plate in the horizontal direction exceeds the first predetermined interval, the first member abuts against the second member, and the friction transmitting plate moves in the horizontal direction. Therefore, the friction damper also functions, and as a result, both the friction damper and the viscous damper effectively function. That is, when the displacement of the vibration is small, only the viscous damper functions, and when the displacement of the vibration is large, both the viscous damper and the friction damper function. In this way, when the displacement of the vibration is large and small, the attenuation mechanism of the vibration can effectively function.

[2] Furthermore, in the vibration damping device of the present invention, it is preferable to be in the aforementioned switching mechanism,
The friction transmitting plate is disposed above the viscous fluid container,
The first member is a first convex portion protruding from an upper portion of the viscous fluid container toward the friction transmitting plate,
The second member is a second convex portion protruding from a lower portion of the friction transmitting plate toward the viscous fluid container,
The first convex portion and the second convex portion are alternately arranged in a horizontal movement direction of the first convex portion with a predetermined interval therebetween.

According to the vibration damping device of this configuration, the first member is a first convex portion protruding from the upper portion of the viscous fluid container toward the friction transmitting plate disposed above the second member, and the second member is a viscous fluid container from the lower portion of the friction transmitting plate. The protruding second protrusions, the plurality of first protrusions and the second protrusions are alternately arranged at a predetermined interval. Therefore, when the first protrusion moves in the horizontal direction, it comes into contact with the second protrusion at the plurality of locations. , And it is possible to switch from the attenuation of the vibration performed only by the viscous damper to the attenuation of the vibration performed by the frictional damper.

[3] Further, in the vibration damping device of the present invention, it is preferable that the switching mechanism is provided at a portion where the first convex portion and the second convex portion abut, and is provided to relax the first convex portion and the second convex portion. Cushioning mechanism for bumps.

According to the vibration damping device having this configuration, the first convex portion and the second convex portion can be smoothly contacted by the buffer mechanism.

[4] A second aspect of the vibration damping device of the present invention,
It is a vibration damping device provided by a structure including a lower side beam portion and an upper side beam portion, and is characterized in that: the vibration in the horizontal direction of the lower side beam portion and the upper side beam portion is attenuated by an adhesive force. A viscous damper coupled to the viscous damper, and a friction damper that attenuates vibrations of the lower side beam portion and the upper side beam portion in a horizontal direction by friction, and switches the viscous damper Switching mechanism for attenuation of vibration performed separately and attenuation of vibration performed solely by the friction damper;
The viscous damper includes a viscous fluid container fixed to the lower side beam portion, a viscous fluid stored in the viscous fluid container, and friction transmission that hangs down while being fixed to the upper side beam portion. A resistance plate that hangs down from the friction transmitting plate via the friction damper, is immersed in the viscous fluid, and moves horizontally relative to the viscous fluid container;
The friction damper includes the friction transmission plate, the resistance plate provided horizontally movable with respect to the friction transmission plate, and a friction force generating portion provided between the resistance plate and the friction transmission plate;
The switching mechanism includes a through hole formed so as to penetrate the resistance plate, and the viscous fluid container is provided through the through hole, and when the viscous fluid container is in a horizontal direction with respect to the resistance plate, When the displacement exceeds the first predetermined interval, the passage member that moves the resistance plate and the viscous fluid container relatively horizontally relative to the friction transmission plate by contacting the edge portion of the through hole.

According to the vibration damping device of this configuration, the vibration in the horizontal direction of the lower side beam portion and the upper side beam portion can be damped by the viscous damper and the friction damper. Specifically, on the viscous damper side, when the resistance plate suspended from the upper side beam portion via the friction damper moves in a horizontal direction relative to the viscous fluid container fixed on the lower side beam portion, it is stored in the viscous fluid container. The viscous fluid of the viscous fluid container attenuates the vibration of the resistance plate in the horizontal direction relative to the viscous fluid container.

In addition, on the friction damper side, when the friction transmitting plate moves in a horizontal direction relative to the resistance plate, the friction force generating portion provided between the friction transmitting plate and the resistance plate makes the resistance plate relative to the friction transmitting plate. Vibration attenuation in the horizontal direction. Here, the switching mechanism, when the displacement of the viscous fluid container with respect to the resistance plate in the horizontal direction exceeds the first predetermined interval, the passage member provided on the viscous fluid container abuts the edge of the through hole provided on the resistance plate. Part, the resistance plate is moved in the horizontal direction together with the viscous fluid container.

Therefore, when the velocity and displacement of the vibration are small, and the displacement of the viscous fluid container relative to the resistance plate in the horizontal direction is less than the first predetermined interval, the member does not abut the edge of the through hole, and the resistance plate is not in contact with the viscosity. The fluid container moves horizontally together, so the friction damper does not work, only the viscous damper works effectively. In addition, when the velocity and displacement of the vibration increase and the horizontal displacement of the viscous fluid container relative to the resistance plate exceeds the first predetermined interval, the member contacts the edge of the through hole, and the resistance plate and the viscous fluid container They move horizontally together, so the viscous damper is not functioning, and only the friction damper is functioning. That is, when the speed and displacement of the vibration are small, only the viscous damper that is effective for vibrations with small speed and displacement functions. When the speed and displacement of the vibration is large, only frictional damping that is effective for vibration with large speed and displacement Device works. In this way, when the speed and displacement of the vibration are large and small, the attenuation mechanism of the vibration can effectively function.

[5] Further, in the vibration damping device of the present invention, it is preferable to be in the aforementioned switching mechanism,
The passing member is a bolt for preventing expansion that prevents expansion of the viscous fluid container,
The through-hole is a retraction long hole of the expansion-preventing bolt.

According to the vibration damping device of this configuration, the switching mechanism uses a swelling prevention bolt for preventing swelling of the viscous fluid container and a retraction long hole of the swelling prevention bolt, so that it can be simplified.

[6] In the vibration damping device of the present invention, it is preferable that the switching mechanism is provided at a portion where the passing member is in contact with an edge portion of the through hole, and is provided with an edge portion for relaxing the passing member and the through hole. Collision buffer mechanism.

According to the vibration damping device having this configuration, the contact between the passing member and the edge portion of the through hole can be smoothly performed by the buffer mechanism.

(First Embodiment)
As shown in FIG. 1, the vibration damping device 10 according to the first embodiment of the present invention is provided in a structure 1 such as a building. The structure 1 includes a lower side beam portion 2 extending in a horizontal direction, and a column (not shown) extending upward from the lower side beam portion 2, and a column is formed above the lower side beam portion 2. The upper side beam portion 3 is supported and extended in the horizontal direction.

The vibration damping device 10 includes a viscous damper 11 that attenuates the relative vibration in the horizontal direction of the lower side beam portion 2 and the upper side beam portion 3 by a viscous force, and a viscous damper 11 connected to the viscous damper 11 and Friction damper 30 that attenuates vibrations in the horizontal direction of the lower side beam portion 2 and the upper side beam portion 3 by frictional force, and switching the attenuation of the vibration independently performed by the viscous damper 11 and the viscous damper 11 and friction A switching mechanism 40 for damping the vibration of the combined use of the damper 30. The viscous damper is used alone or in combination.

(Composition of Viscous Damper 11)
For simplicity of description, let the horizontal direction (left and right direction) of the lower side beam portion 2 in the horizontal plane be the X direction, and the direction perpendicular to the X direction (the front and back direction in the drawing) in the horizontal plane be the Y direction. The straight direction (up and down direction) is set to the Z direction.

The viscous damper 11 includes a bottomed rectangular cylindrical viscous fluid container 12 that is fixed so that the bottom surface abuts the upper surface of the lower side beam portion 2, and a viscous fluid container 12 stored in the viscous fluid container 12. The fluid 13 and the resistance plate 14 are suspended in a state fixed to the upper side beam portion 3 and immersed in the fluid 13 and are moved horizontally relative to the fluid container 12.

The viscous fluid container 12 has a smaller size in the Y direction than a size in the X direction and the Z direction, and has an open box shape at the top. The viscous fluid container 12 includes a bottom portion 15 and a standing wall portion 16 standing up from the bottom portion 15. And, the bottom portion 15 is provided at the lower end portion of the standing wall portion 16 so as to extend in the Y direction, and is fixed to the lower gusset 18 of the lower side beam portion 2 via a locking member 17. In addition, the viscous fluid container 12 is provided with an expansion bolt 16 for preventing the swelling of the viscous fluid container 12 in the Y-direction by a standing wall portion 16 penetrating the front and back surfaces. The bottom 15 and the lower gusset 18 may also be integrally formed.

The viscous fluid 13 is, for example, a high-viscosity polymer material such as silicone oil or a hydrocarbon compound. The viscous fluid 13 has flame retardancy, weather resistance, and durability. The repeated shearing of the viscous fluid 13 caused by the displacement does not cause a decrease in viscosity.

The resistance plate 14 is a plate formed into a substantially rectangular shape when viewed from above, and includes: an entire area in the X direction covering the upper end portion is locked by a locking member 21 and is formed in a cross section L shape in the X direction on the YZ plane. The upper gusset 22 extends upward, and a long through hole 23 is formed in the central portion and the lower portion in the horizontal direction. The expansion preventing bolt 19 passes through the through hole 23. The upper gusset 22 is locked to the upper side beam portion 3 via a locking member 24.

(Construction of Friction Damper 30)

The friction damper 30 includes a friction transmission plate 31 which is horizontally movable in the ± X direction with respect to the resistance plate 14 of the viscous damper 11 and a Y sandwiching the friction transmission plate 31 and the resistance plate 14. The frictional force generating portion 32 is provided in a direction between directions.

The friction transmitting plate 31 is a substantially rectangular plate formed in a horizontal direction and long in a plan view. The friction transmitting plate 31 is disposed above the viscous fluid container 12 and is disposed on both sides of the resistance plate 14 at the same time.

The friction force generating portion 32 is composed of a friction material (not shown in the figure) provided on the friction transmitting plate 31 and having a predetermined friction coefficient, and stainless steel (not shown in the figure) as a rival material provided in the resistance plate 14. Make up. A through hole (not shown) is formed in the friction transmitting plate 31 for allowing the locking member 34 to pass through. A through hole 33 having a longer horizontal direction is formed in the upper portion of the resistance plate 14, and the locking member 34 is inserted into the through hole of the friction transmitting plate 31 and the through hole 33 of the resistance plate 14 in the Y direction, so that The friction transmitting plate 31 is locked to the resistance plate 14. The locking member 34 is composed of a PC steel rod, a bolt, or the like and a nut. Between the nut and the friction transmitting plate 31, a support plate (not shown) having a rectangular shape and a washer function when viewed in plan is arranged.

In addition, in the embodiment, the friction transmission plates 31 are arranged on both sides of one resistance plate 14, but the invention is not limited to this, and a configuration in which one friction transmission plate 31 is sandwiched by two resistance plates 14, or If the frictional force generating portion 32 is provided between the frictional transmission plate 31 and the resistance plate 14 and the frictional force is applied to the frictional force generating portion 32 by the axial force of the lock member 34, the frictional transmission plate 31 and the resistance plate The number of pieces of 14 may be different.

In the embodiment, the friction force generating portion 32 is provided between the friction transmitting plate 31 and the resistance plate 14 as another member. However, the present invention is not limited to this. The friction transmitting plate 31 and the resistance plate 14 may be directly slid, and The sliding portions are provided as frictional force generating portions 32, respectively. In addition, in the embodiment, the resistance plate 14 is constituted by a single plate, but the invention is not limited to this. If the resistance plate 14 can be suspended and moved integrally while being fixed to the upper side beam portion 3, the resistance plate 14 can be rubbed. The upper and lower portions of the force generating portion 32 are separated into two pieces and connected by a locking member or the like, or the entire resistance plate 14 is composed of two or three or more pieces.

(Configuration of Switching Mechanism 40)
The switching mechanism 40 includes a plurality of first members 41 provided in the viscous fluid container 12, and is provided on the friction transmitting plate 31 opposite to the ± X direction (horizontal direction) of the first member 41, and is viscous. The plurality of second members 42 arranged so as to abut the first member 41 when the displacement of the fluid container 12 relative to the friction transmission plate 31 in the ± X direction (horizontal direction) exceeds the first predetermined interval L1. The first predetermined interval L1 is a distance between an end portion in the horizontal direction of the first member 41 and an end portion of the second member 42 opposite to the end portion.

Specifically, the friction transmitting plate 31 is disposed above the viscous fluid container 12. The plurality of first members 41 are first convex portions that protrude toward (or in the + Z direction) from the upper portion of the viscous fluid container 12. The second member 42 is a second convex portion protruding from the lower portion of the friction transmitting plate 31 toward the viscous fluid container 12 (or in the -Z direction).

The plurality of first convex portions 41 are arranged apart from each other in the X direction. The plurality of second convex portions 42 are arranged apart from each other in the X direction. Between the adjacent pair of first convex portions 41, one second convex portion 42 is arranged in the X direction with the pair of first convex portions 41 at the same first predetermined interval L1. The plurality of first convex portions 41 and the second convex portions 42 are alternately arranged in a horizontal direction with a first predetermined interval L1 therebetween. The plurality of first convex portions 41 and the second convex portions 42 are all arranged at equal intervals at a first predetermined interval L1. The upper end of the first convex portion 41 is located higher than the lower end of the second convex portion 42 in the + Z direction.

In addition, the resistance plate 14 can move horizontally with respect to the viscous fluid container 12, but the second predetermined interval L2 is a range until the expansion bolt 19 is prevented from contacting the through hole 23, and the second predetermined interval L2 is smaller than the first predetermined interval L2. The predetermined interval L1 is large. The second predetermined interval L2 is the distance from the left end of the threaded portion of the expansion preventing bolt 19 in the X direction to the left edge of the through hole 23 in the state where the resistance plate 14 is not displaced relative to the viscous fluid container 12. The distance from the right end of the threaded portion of the bolt 19 for preventing expansion in the X direction to the right edge of the through hole 23 is also the second predetermined interval L2.

The switching mechanism 40 is a portion where the first convex portion 41 and the second convex portion 42 are in contact with each other, and includes a buffer mechanism 43 for reducing a collision between the first convex portion 41 and the second convex portion 42. The buffer mechanism 43 is made of, for example, an elastic member.

(The role of the viscous damper 11)
In the viscous damper 11, a gap is formed between the viscous fluid container 12 and the resistance plate 14, and the viscous fluid 13 enters the gap. The viscous damper 11 uses the viscosity caused by the relative vibration of the resistance plate 14 in the horizontal direction with respect to the viscous fluid container 12 when the upper side beam portion 3 is vibrated in the horizontal direction relative to the lower side beam portion 2. The viscous shear resistance of the fluid 13 attenuates the vibration of the resistance plate 14 relative to the viscous fluid container 12 by the viscous force.

(Function of the friction damper 30)
The friction damper 30 is a damping device that uses the frictional resistance of the frictional force generating portion 32. The locking member 34 is locked to transmit the axial force or the locking force of the locking member 34 to the friction of the frictional force generating portion 32. material. When the resistance plate 14 and the friction transmission plate 31 are moved relatively in the horizontal direction, a dynamic friction force is generated on the friction surface to obtain friction resistance, and the vibration of the resistance plate 14 relative to the friction transmission plate 31 is attenuated by the friction force.

(Role of Switching Mechanism 40)
The switching mechanism 40 is switched independently by the viscous damper 11 according to the displacement of the viscous fluid container 12 relative to the friction transmitting plate 31 caused by the vibration of the upper side beam portion 3 relative to the lower side beam portion 2. The attenuation of the vibration and the attenuation of the vibration by the combined use of the viscous damper 11 and the friction damper 30. When the displacement in the horizontal direction of the viscous fluid container 12 with respect to the friction transmitting plate 31 is within the first predetermined interval L1, the first member 41 is not in contact with the second member, or even if it is in contact, the second member is not contacted. Since it is displaced together with the first member 41, only the viscous damper 11 functions.

When the displacement of the viscous fluid container 12 in the horizontal direction with respect to the friction transmitting plate 31 exceeds the first predetermined interval L1, the first member 41 abuts against the second member 42, and the second member 42 and the first member 41 are displaced together. Therefore, both the viscous damper 11 and the friction damper 30 function. In this way, the switching mechanism 40 causes only the viscous damper 11 to function when the displacement of the second member 42 relative to the first member 41 is within the first predetermined interval L1, and the second member 42 is relative to the first member 41 When the displacement exceeds the first predetermined interval L1, it is switched so that both the viscous damper 11 and the friction damper 30 function.

(Configuration of the vibration damping device 10 of the first embodiment)
As shown in FIG. 2, a vibration damping device 10 is disposed between the lower side beam portion 2 and the upper side beam portion 3. In the vibration damping device 10, the viscous damper 11 and the friction damper 30 are connected in parallel, and the switching mechanism 40 is further connected.

When the relative displacement (vibration) of the upper side beam portion 3 with respect to the lower side beam portion 2 is small (within the range of the first predetermined interval L1 of the switching mechanism 40), the switching mechanism 40 will not be shaken (the first predetermined The interval L1) is switched, so the vibration is damped only by the viscous damper 11.

When the relative displacement (vibration) of the upper side beam portion 3 with respect to the lower side beam portion 2 is large (when the first predetermined interval L1 of the switching mechanism 40 is exceeded), the switching mechanism 40 switches, so the friction damper 30 also functions The vibration is attenuated by both the viscous damper 11 and the friction damper 30.

(Function of the vibration damping device 10 of the first embodiment)
For the sake of simplicity, it is assumed that the upper beam portion 3 is also displaced relative to the lower beam portion 2 during vibration.
As shown in FIG. 3A, in a state where there is no vibration, the upper side beam portion 3 does not move relative to the lower side beam portion 2.

As shown in FIG. 3B, in a state where the vibration is small (within the range of the first predetermined interval L1 in FIG. 3A), the upper beam portion 3 is displaced like the arrow (1) relative to the lower beam portion 2, The friction transmitting plate 31 is displaced like the arrow (2) together with the resistance plate 14, and the vibration is damped only by the viscous damper 11.

As shown in FIG. 3C, in a state of large vibration (beyond the range of the first predetermined interval L1 in FIG. 3A), the upper side beam portion 3 is further displaced relative to the lower side beam portion 2 as an arrow (3) The second convex portion 42 abuts on the first convex portion 41 to switch the switching mechanism 40. Although the resistance plate 14 is further displaced like the arrow (4), the friction transmitting plate 31 is not further displaced by the switching mechanism 40. Therefore, the friction transmitting plate 31 is relatively displaced with respect to the resistance plate 14 like an arrow (5). As a result, the friction damper 30 also functions, and the vibration is damped by both the viscous damper 11 and the friction damper 30.

Compared with the second predetermined interval L2 in FIG. 3A, the third predetermined interval L3 from the right end of the resistance plate 14 in the X direction to the inner wall of the viscous fluid container 12 is larger, so it is smaller than the third predetermined interval L2. In FIG. C, the expansion preventing bolt 19 is in contact with the X-direction end portion of the through hole 23, and the X-direction end of the resistance plate 14 is not in contact with the inner wall of the viscous fluid container 12.

(Relationship between damping force and displacement (history shape))
As shown in FIG. 4A, in a state where the displacement caused by the vibration is small, since the displacement of the switching mechanism 40 is within the first predetermined interval L1 (within shaking), only the displacement generated by the viscous damper 11 is generated. Viscous force acts as a damping force. Shortly after the shock, the damping force increases like arrow (11), and then only the viscous force acts, while the damping force and displacement change like arrow (12).

As shown in FIG. 4B, in the state where the displacement caused by the vibration is in a neutral position, the displacement of the switching mechanism 40 exceeds the first predetermined interval L1 (greater than the wobble), so that the displacement caused by the viscous damper 11 is generated. The viscous force and the friction force generated by the friction damper 30 serve as a damping force. Shortly after the shock, the curve becomes a two-stage curve like the arrow (13), and the damping force increases when the displacement is in the middle position. The damping force generated by the viscous force of the viscous damper 11 and the frictional force of the friction damper 30 is larger than that shown in FIG. 4A by the viscous force of the viscous damper 11 alone. .

Next, in the state where both the viscous force and the friction force are acting, the damping force and displacement change as shown by arrow (14). When the displacement direction of the vibration is reversed, the second convex portion 42 is relative to the first convex portion 41. When the displacement direction is reversed, in a state where only a sway component of the switching mechanism 40 is applied by the viscous force, as shown by the arrow (15), the displacement is changed to reduce the displacement, and the second convex portion 42 abuts again. At the first convex portion 41, the switching mechanism 40 causes the viscous force and the friction force to act like arrows (16) to increase the damping force. Then, in a state where both the viscous force and the friction force are acting, the attenuation force and the displacement are changed like the arrow (17).

As shown in FIG. 4C, in a state where the displacement caused by the vibration is larger, the displacement of the switching mechanism 40 exceeds the first predetermined interval L1 (greater than the wobble), so the viscosity produced by the viscous damper 11 is generated. The sexual force and the frictional force generated by the friction damper 30 serve as a damping force. The change in the damping force is almost the same as that in FIG. 4B, but the displacement is larger than that in FIG. 4B.

With the structure of the vibration damping device 10 of the first embodiment described above, the vibration in the horizontal direction of the lower side beam portion 2 and the upper side beam portion 3 can be damped by the viscous damper 11 and the friction damper 30. Specifically, on the viscous damper 11 side, when the resistance plate 14 suspended from the upper side beam portion 3 moves in a horizontal direction relative to the viscous fluid container 12 provided on the lower side beam portion 2, it is stored in the viscous fluid container. The viscous fluid 13 of the viscous fluid container 12 attenuates the vibration of the resistance plate 14 in the horizontal direction relative to the viscous fluid container 12.

When the friction transmission plate 31 moves in the horizontal direction relative to the resistance plate 14 on the friction damper 30 side, the resistance plate is caused by the friction force generating portion 32 provided between the friction transmission plate 31 and the resistance plate 14. 14 The vibration in the horizontal direction with respect to the friction transmission plate 31 is attenuated. Here, when the horizontal displacement of the viscous fluid container 12 with respect to the friction transmitting plate 31 exceeds the first predetermined interval L1, the switching mechanism 40 abuts the first member 41 provided on the viscous fluid container 12 in contact with The second member 42 of the friction transmission plate 31 moves the friction transmission plate 31 together with the viscous fluid container 12 in the horizontal direction relative to the resistance plate 14.

Therefore, when the displacement of the vibration is small and the relative displacement of the viscous fluid container 12 with respect to the friction transmitting plate 31 in the horizontal direction is equal to or less than the first predetermined interval L1, the first member 41 does not contact the second member 42 and the friction transmission occurs. Since the plate 31 does not move relatively horizontally, the friction damper 30 does not function, and only the viscous damper 11 effectively functions.

When the displacement of the vibration increases and the relative displacement of the viscous fluid container 12 relative to the friction transmitting plate 31 in the horizontal direction exceeds the first predetermined interval L1, the first member 41 abuts against the second member 42 and the friction transmitting plate 31 and the viscous fluid container 12 move relatively in the horizontal direction relative to the resistance plate 14, so the friction damper 30 also functions, and as a result, both the friction damper 30 and the viscous damper 11 effectively function. That is, when the displacement of the vibration is small, only the viscous damper 11 functions, and when the displacement of the vibration is large, both the viscous damper 11 and the friction damper 30 function. In this way, when the displacement of the vibration is large and small, the attenuation mechanism of the vibration can effectively function.

In the switching mechanism 40, the first member 41 is a first convex portion 41 protruding from the upper portion of the viscous fluid container 12 toward the friction transmitting plate 31 disposed above, and the second member 42 is formed from the friction transmitting plate 31. The second protrusions 42 projecting downward toward the viscous fluid container 12. The first protrusions 41 and the second protrusions 42 are alternately arranged at a predetermined interval L1. Therefore, when the first protrusions 41 are horizontal, When moving, it comes into contact with the second convex portion 42 at a plurality of points, and it is possible to surely switch from the attenuation of the vibration by the viscous damper 11 only to the attenuation of the vibration by the frictional damper 30 as well.

In addition, the switching mechanism 40 can smoothly contact the first convex portion 41 and the second convex portion 42 by the buffer mechanism 43.

(Second Embodiment)
For the same configuration as the second embodiment, the description is omitted and this symbol is used in common. As shown in FIG. 5, the vibration damping device 50 according to the second embodiment of the present invention is provided, for example, in a structure 1 including a lower side beam portion 2 and an upper side beam portion 3 in a building or the like.

The vibration damping device 50 includes a viscous damper 51 that attenuates relative vibration in the horizontal direction of the lower side beam portion 2 and the upper side beam portion 3 by a viscous force, and is connected to the viscous damper 51 and Friction damper 70 that attenuates the vibration in the horizontal direction of the lower side beam portion 2 and the upper side beam portion 3 by frictional force, and switches the attenuation of the vibration independently performed by the viscous damper 51 and the viscous damper 51 and friction A switching mechanism 80 for damping the vibration of the combined use of the damper 70.

(Construction of Viscous Damper 51)
The viscous damper 51 includes a bottomed rectangular cylindrical viscous fluid container 52 that is fixed so that the bottom surface abuts the upper surface of the lower side beam portion 2 and a viscous fluid container 52 stored in the viscous fluid container 52. The fluid 51 and the friction transmitting plate 71 hanging down in a state of being fixed to the upper side beam portion 3, and the friction transmitting plate 71 is suspended by the friction transmitting plate 71 via the friction damper 70 and immersed in the viscous fluid 53 and is opposed to the viscous fluid container. 52 is a resistance plate 54 for horizontal movement.

The viscous fluid container 52 has a smaller size in the Y direction than a size in the X direction and the Z direction, and has an open box shape at the top. The viscous fluid container 52 includes a bottom portion 55 and a standing wall portion 56 standing up from the bottom portion 55. And it is provided in the lower end part of this standing wall part 56 so that the bottom part 55 may be extended, and it is fixed to the lower gusset 58 of the lower side beam part 2 via the locking member 57. In addition, the viscous fluid container 52 is provided with an anti-expansion bolt 59 for preventing the swelling of the viscous fluid container 52 in the Y direction by standing wall portions 56 penetrating the front and back surfaces. The bottom 55 and the lower gusset 58 may be formed integrally.

The viscous fluid 53 is, for example, a high-viscosity polymer material such as silicone oil or a hydrocarbon compound, and has flame retardancy, weather resistance, durability, and does not cause viscosity reduction for repeated shearing. Made of materials.

The friction transmitting plate 71 is a substantially rectangular plate material that is formed in a long horizontal direction when viewed from above. The friction transmission plate 71 includes an entire area in the X direction covering the upper end portion and is locked by a locking member 61. The L-shaped gusset plate 62 extends in the X direction, and a long through hole 73 is formed in the central portion in the horizontal direction. A locking member 74 inserted through a through hole (not shown) formed in the upper portion of the resistance plate 54 passes through the through hole 73. The upper gusset 62 is locked to the upper side beam portion 3 via a locking member 64.

The resistance plate 54 is a plate material formed into a substantially rectangular shape in plan view, and includes a through hole (not shown in the figure) formed through the locking member 74 formed in the upper portion, and a substantially rectangular shape formed in the central portion and the lower portion. Through-hole 63. The upper portion of the resistance plate 54 overlaps the friction transmitting plate 71 in the Y direction, and the locking member 74 is inserted through the through hole of the resistance plate 54 and the through hole 73 of the friction transmitting plate 71 in the Y direction. The resistance plate 54 is locked to the friction transmitting plate 71. The expansion preventing bolt 59 passes through the through hole 63.

(Construction of Friction Damper 70)
The friction damper 70 includes a friction transmission plate 71 which is locked to the upper gusset plate 62 by a locking member 61, and a resistance plate 54, which is horizontally movable in the ± X direction with respect to the friction transmission plate 71, And a frictional force generating portion 72 provided between the resistance plate 54 and the friction transmitting plate 71. The friction transmitting plate 71 is arranged above the viscous fluid container 52.

The friction force generating portion 72 is a friction material (not shown) provided on the friction transmitting plate 71 and having a predetermined friction coefficient and generating a friction force greater than the viscosity of the viscous damper 51, and is provided on the friction transmission plate 71. The resistance plate 54 is made of stainless steel (not shown) or the like, which is the material of the opponent. A through hole 73 is formed in the friction transmitting plate 71 for allowing the locking member 74 to pass therethrough. A through hole (not shown) is formed in the upper portion of the resistance plate 54, and the locking member 74 is inserted into the through hole of the resistance plate 54 and the through hole 73 of the friction transmitting plate 71 in the Y direction to fix the through hole. The resistance plate 54 is locked to the friction transmitting plate 71. In addition, the locking member 74 is composed of a steel rod (so-called (PC steel rod)) and a nut formed with a thread. Between the nut and the friction transmission plate 71, a rectangular shape and a washer function in a plan view are arranged Support plate (not shown).

The lock member 74 may be configured as a bolt and a nut. In addition, in the embodiment, one resistance plate 54 is arranged on one friction transmission plate 71, but it is not limited to this, and a configuration in which one friction transmission plate 71 is sandwiched by two resistance plates 54 or If a frictional force generating portion 72 is provided between the frictional transmission plate 71 and the resistance plate 54 and the frictional force is applied to the frictional force generation portion 72 by the axial force of the lock member 74, the frictional transmission plate 71 and the resistance plate 54 The number of pieces can also be different. In addition, in the embodiment, the friction force generating portion 72 is separately provided between the friction transmitting plate 71 and the resistance plate 54 as other members, but the invention is not limited to this, and the friction transmitting plate 71 and the resistance plate 54 may be directly slid. And the sliding portions are set as the friction force generating portions 72, respectively.

(Configuration of Switching Mechanism 80)
The switching mechanism 80 includes a substantially rectangular through-hole 63 formed so as to penetrate the resistance plate 54, and the through-hole 63 passes through the through-hole 63 and is provided in the viscous fluid container 52. When the displacement of the resistance plate 54 in the ± X direction (horizontal direction) exceeds the first predetermined interval L1, it abuts against the edge of the through hole 63 so that the resistance plate 54 and the viscous fluid container 52 go in the ± X direction (horizontal direction) together. The moving passage member 81; the first predetermined interval L1 in the ± X direction (horizontal direction) from the edge of the through hole 63 to the passage member 81 is set to be ± X from the resistance plate 54 to the friction transmission plate 71 The second movable interval L2 in the direction (horizontal direction) is small.

In the embodiment, a through hole (not shown) is formed in the through member 81 and the expansion preventing bolt 59 is inserted into the through hole. However, the present invention is not limited to this. The passing member 81 and the expansion preventing bolt 59 may be used. The integrally formed bolts 59 for preventing expansion are formed. In this case, the through-hole 63 may be provided as a retreating long hole for the expansion-preventing bolt 59.

In addition, the resistance plate 54 is movable in the horizontal direction with respect to the viscous fluid container 52, but the first predetermined interval L1 is a range until the member 81 or the expansion-preventing bolt 59 comes into contact with the through hole 63, and the second predetermined interval L2 is larger than the first predetermined interval L1. The second predetermined interval L2 is the distance from the left end of the threaded portion of the locking member 74 in the X direction to the left edge of the through hole 73 when the resistance plate 54 is not displaced relative to the viscous fluid container 52. The distance from the right end portion of the screw portion of the locking member 74 in the X direction to the right edge of the through hole 73 is also the second predetermined interval L2.

In addition, the switching mechanism 80 is provided at the portion where the passing member 81 or the expansion preventing bolt 59 abuts against the through hole 63, and includes a buffer mechanism 83 for reducing the collision between the passing member 81 or the preventing expansion bolt 59 and the through hole 63. The buffer mechanism 83 is made of, for example, an elastic member.

(The role of the viscous damper 51)
In the viscous damper 51, a gap is formed between the viscous fluid container 52 and the resistance plate 54, and the viscous fluid 53 enters the gap. The viscous damper 51 uses the viscosity caused by the relative vibration of the resistance plate 54 in the horizontal direction with respect to the viscous fluid container 52 when the upper side beam portion 3 vibrates in the horizontal direction relative to the lower side beam portion 2. The viscous shear resistance of the fluid 53 attenuates the vibration of the resistance plate 54 relative to the viscous fluid container 52 by the viscous force.

(The role of the friction damper 70)
The friction damper 70 is a damping device that uses the frictional resistance of the frictional force generating portion 72 and locks the locking member 74 to transmit the axial force or the locking force of the locking member 74 to the friction of the frictional force generating portion 72. material. When the resistance plate 54 and the friction transmission plate 71 are relatively moved in the horizontal direction, a dynamic friction force is generated on the friction surface to obtain friction resistance, and the vibration of the resistance plate 54 with respect to the friction transmission plate 71 is attenuated by the friction force.

(Role of Switching Mechanism 80)
The switching mechanism 80 is switched by the viscous damper 51 independently according to the displacement of the viscous fluid container 52 relative to the resistance plate 54 caused by the vibration of the upper side beam portion 3 relative to the lower side beam portion 2. Attenuation of vibration and attenuation of vibration by the friction damper 70 alone. When the displacement in the horizontal direction of the viscous fluid container 52 with respect to the resistance plate 54 is within the first predetermined interval L1, the passage member 81 is not in contact with the through hole 63, or even if it is in contact, the passage member 81 is relative to the through hole 63. There is no greater displacement than this, so only the viscous damper 51 functions. When the displacement of the viscous fluid container 52 in the horizontal direction with respect to the resistance plate 54 exceeds the first predetermined interval L1, the member 81 abuts the through hole 63 and is integrated with the viscous fluid container 52 and the resistance plate 54 together. Displacement.

Therefore, the resistance plate 54 is displaced relative to the friction transmission plate 71, and only the friction damper 70 functions. In this way, when the displacement mechanism 80 in the horizontal direction of the viscous fluid container 52 with respect to the resistance plate 54 is within the first predetermined interval L1, only the viscous damper 51 functions, and the viscous fluid container 52 faces When the displacement in the horizontal direction of the resistance plate 54 exceeds the first predetermined interval L1, only the manner in which the friction damper 70 is made effective is switched.

(Configuration of the vibration damping device 50 of the second embodiment)
As shown in FIG. 6, a vibration damping device 50 is disposed between the lower side beam portion 2 and the upper side beam portion 3. In the vibration damping device 50, the viscous damper 51 and the friction damper 70 are connected in series, and the switching mechanism 80 is further connected.

When the relative displacement (vibration) of the upper side beam portion 3 relative to the lower side beam portion 2 is small (within the range of the first predetermined interval L1 of the switching mechanism 80), the switching mechanism 80 does not shake due to the first predetermined The interval L1) is switched, so the vibration is damped only by the viscous damper 51.

When the relative displacement (vibration) of the upper side beam portion 3 with respect to the lower side beam portion 2 is large (when the first predetermined interval L1 of the switching mechanism 80 is exceeded), the switching mechanism 80 performs switching, so instead of the viscous damper 51, Only the friction damper 70 functions to attenuate the vibration.

(Operation of the vibration damping device 50 of the second embodiment)
For the sake of simplicity, it is assumed that the upper beam portion 3 is also displaced relative to the lower beam portion 2 during vibration. As shown in FIG. 7A, in a state where there is no vibration, the upper side beam portion 3 does not move relative to the lower side beam portion 2.

As shown in FIG. 7B, in a state where the vibration is small (within the range of the first predetermined interval L1 in FIG. 7A), the upper side beam portion 3 is displaced like the arrow (21) relative to the lower side beam portion 2, The resistance plate 54 is displaced like the arrow (22) together with the friction transmitting plate 71, and the vibration is damped only by the viscous damper 51.

As shown in FIG. 7C, in a state of large vibration (beyond the range of the first predetermined interval L1 in FIG. 7A), the upper side beam portion 3 is further displaced relative to the lower side beam portion 2 as an arrow (23) When the member 81 comes into contact with the through hole 63, the switching mechanism 80 is switched. Although the resistance plate 54 is not displaced relative to the viscous fluid container 52, the friction transmitting plate 71 is displaced relative to the resistance plate 54 by the switching mechanism 80 as indicated by arrow (24). As a result, the friction damper 70 functions, and the vibration is damped only by the friction damper 70.

In FIG. 7C, when the speed of displacement caused by vibration is large, since the viscosity force is higher than the friction force, even if the passing member 81 is not brought into contact with the through hole 63 by the switching mechanism 80, it may sometimes Generate friction.

(Relationship between damping force and displacement (history shape))
As shown in FIG. 8A, in a state where the displacement caused by the vibration is small, since the displacement of the switching mechanism 80 is within the first predetermined interval L1 (within shaking), only the displacement generated by the viscous damper 51 is generated. Viscous force acts as a damping force. Shortly after the shock, the damping force increases with a small displacement like the arrow (31), and then only the viscous force acts, while the damping force and displacement change like the arrow (32).

As shown in FIG. 8B, in the state where the displacement caused by the vibration is in the neutral position, the displacement of the switching mechanism 80 exceeds the first predetermined interval L1 (greater than the wobble), so only the displacement generated by the friction damper 70 is generated. Friction acts as a damping force. When the displacement of the switching mechanism 80 is less than the first predetermined interval L1 shortly after the vibration occurs, only the viscous force acts as the arrow (33) to increase the damping force, and then the member 81 abuts to the through hole 63, and the damping force is increased by the switching mechanism 80 having only the frictional force acting like the arrow (34).

Then, in a state where only the frictional force acts, the damping force and displacement change like the arrow (35). When the displacement direction of the vibration is reversed and the displacement direction of the passage member 81 with respect to the through hole 63 is reversed, In a state in which only a sway component of the switching mechanism 80 is applied by the viscous force, as shown by the arrow (36), the displacement is changed so as to reduce the displacement. The member 81 abuts against the through hole 63 again, and the switching mechanism is used. 80, like the arrow (37), causes only the frictional force to increase the damping force. Then, in a state where only the frictional force acts, the attenuation force and displacement change as shown by arrow (38).

When the viscous force is greater than the friction force, the friction force starts to be generated. Due to the speed dependence of the viscous body, when the speed of the earthquake is large, the viscous force is greater than the friction force.

As shown in FIG. 8C, in a state where the displacement caused by the vibration is larger, the change in the attenuation force is almost the same as that in FIG. 8B, but the displacement is increased compared to the state in FIG. 8B.

In the first embodiment, the first member 41 is provided as the first convex portion having a rectangular shape in a plan view, and the second member 42 is provided as the second convex portion having a rectangular shape in a plan view, but it is not limited to this. In this case, the first member 41 may have a trapezoidal or semi-circular shape when viewed from above, and the second member 42 may also have a trapezoidal or semi-circular shape, or the first member 41 may be configured to protrude in the + Y direction. The pin and the configuration in which the second member 42 serves as a pin receiving portion may be switched as long as the friction transmission plate 31 is displaced relative to the resistance plate 14 when it exceeds the first predetermined interval L1, and may be other. Make up.

In addition, in the first embodiment, the distance from the right end of the first member 41 to the left end of the second member 42 adjacent to the right and the right end of the second member 42 adjacent to the left from the left end of the first member 41 are provided. The distances up to this point are equally shifted left and right as the first predetermined interval L1. However, the distance is not limited to this, and the distance from the right end of the first member 41 to the left end of the second member 42 adjacent to the right may be changed from The distance from the left end of the first member 41 to the right end of the second member 42 adjacent to the left is set to be non-uniform.

1: Structure
2: lower side beam section
3: upper side beam section
10, 50: vibration damping device
11, 51: Viscous damper
12, 52: Viscous fluid container
13, 53: Viscous fluid
14, 54: Resistance plate
15: bottom
16: standing wall
17: Locking member
18: lower gusset
19: Bolts for preventing expansion
21: Locking member
22: Upper gusset
23: through-hole
24: Locking member
30, 70: Friction damper
31, 71: Friction transmission board
32, 72: Friction generating section
40, 80: Switching mechanism
41: first member (first convex portion)
42: second member (second convex portion)
43, 83: buffer mechanism
19, 59: Bolts for preventing expansion
63: Through-hole
81: Through components
L1: 1st predetermined interval
L2: 2nd predetermined interval
L3: 3rd predetermined interval

FIG. 1 is a front view conceptually showing a vibration damping device according to a first embodiment of the present invention.
Fig. 2 is a diagram schematically showing the vibration damping device of Fig. 1.
FIG. 3A is an action diagram of a state in which the displacement caused by vibration is not included in the vibration suppressing device of FIG. 1.
FIG. 3B is an action diagram of a state in which displacement due to vibration is small in the vibration suppressing device of FIG. 1.
FIG. 3C is an action diagram of a state in which the displacement caused by vibration is large in the vibration suppressing device of FIG. 1.
FIG. 4A is a graph showing the relationship between the attenuation force and the displacement in a state where the displacement due to vibration is small in the vibration suppressing device of FIG. 1.
FIG. 4B is a diagram showing the relationship between the attenuation force and the displacement in the state where the displacement caused by vibration is large in the vibration suppressing device of FIG. 1.
FIG. 4C is a graph showing the relationship between the attenuation force and the displacement in the state where the displacement caused by the vibration is larger in the vibration suppressing device of FIG. 1.
Fig. 5 is a front view showing a vibration damping device according to a second embodiment of the present invention.
FIG. 6 is a view schematically showing the vibration damping device of FIG. 5.
FIG. 7A is an action diagram of a state in which the displacement caused by vibration is not included in the vibration suppressing device of FIG. 5.
FIG. 7B is an action diagram of a state in which displacement due to vibration is small in the vibration suppressing device of FIG. 5.
FIG. 7C is an action diagram of a state in which the displacement due to vibration is large in the vibration suppressing device of FIG. 5.
FIG. 8A is a diagram showing the relationship between the attenuation force and displacement in a state where displacement due to vibration is small in the vibration suppressing device of FIG. 5.
FIG. 8B is a graph showing the relationship between the attenuation force and the displacement in a state where the displacement caused by vibration is large in the vibration suppressing device of FIG. 5.
FIG. 8C is a diagram showing the relationship between the attenuation force and the displacement in a state where the displacement caused by the vibration is larger in the vibration suppressing device of FIG. 5.

Claims (6)

A vibration damping device is a vibration damping device provided by a structure including a lower side beam portion and an upper side beam portion, and is characterized in that the level of the lower side beam portion and the upper side beam portion is made horizontal by an adhesive force. A viscous damper for attenuating vibration in a direction, a friction damper connected to the viscous damper and attenuating the vibration in the horizontal direction of the lower side beam portion and the upper side beam portion by friction, and a switching mechanism A switching mechanism for vibration attenuation by the viscous damper alone and vibration attenuation by a combination of the viscous damper and the friction damper;
The viscous damper includes a viscous fluid container fixed to the lower side beam portion, a viscous fluid stored in the viscous fluid container, and hanging down and immersed in a state of being fixed to the upper side beam portion. A resistance plate for moving said viscous fluid horizontally relative to said viscous fluid container;
The friction damper includes a friction transmission plate that is horizontally movable with respect to the resistance plate, and a friction force generating portion provided between the friction transmission plate and the resistance plate of the viscous damper;
The switching mechanism includes: a first member provided on the viscous fluid container; and a second member provided on the friction transmitting plate opposite to a horizontal moving direction of the first member; and when the viscous fluid container is opposed to When the horizontal displacement of the friction transmitting plate exceeds a first predetermined interval between an end portion in the horizontal direction of the first member and an end portion of the second member opposite to the end portion, the friction transmission plate abuts against The first member moves the friction transmitting plate and the viscous fluid container relatively horizontally with respect to the resistance plate. The vibration damping device according to claim 1, wherein in the aforementioned switching mechanism,
The friction transmitting plate is disposed above the viscous fluid container,
The first member is a first convex portion protruding from an upper portion of the viscous fluid container toward the friction transmitting plate,
The second member is a second convex portion protruding from a lower portion of the friction transmitting plate toward the viscous fluid container,
The first convex portion and the second convex portion are alternately arranged in a horizontal movement direction of the first convex portion with a predetermined interval therebetween. The vibration damping device according to claim 1, wherein the switching mechanism is provided at a portion where the first member and the second member abut, and includes a buffer mechanism for mitigating the collision between the first member and the second member. . A vibration damping device is a vibration damping device provided by a structure including a lower side beam portion and an upper side beam portion, and is characterized in that the level of the lower side beam portion and the upper side beam portion is made horizontal by an adhesive force. A viscous damper for attenuating vibration in a direction, a friction damper connected to the viscous damper and attenuating the vibration in the horizontal direction of the lower side beam portion and the upper side beam portion by friction, and a switching mechanism The switching mechanism for the attenuation of the vibration performed by the viscous damper alone and the attenuation of the vibration performed by the friction damper alone;
The viscous damper includes a viscous fluid container fixed to the lower side beam portion, a viscous fluid stored in the viscous fluid container, and friction transmission that hangs down while being fixed to the upper side beam portion. A resistance plate that hangs down from the friction transmitting plate via the friction damper, is immersed in the viscous fluid, and moves horizontally relative to the viscous fluid container;
The friction damper includes the friction transmission plate, the resistance plate provided horizontally movable with respect to the friction transmission plate, and a friction force generating portion provided between the resistance plate and the friction transmission plate;
The switching mechanism includes a through hole formed so as to penetrate the resistance plate, and the viscous fluid container is provided through the through hole, and when the viscous fluid container is in a horizontal direction with respect to the resistance plate, When the displacement exceeds the first predetermined interval, the passage member that moves the resistance plate and the viscous fluid container relatively horizontally relative to the friction transmission plate by contacting the edge portion of the through hole. The vibration damping device according to claim 4, wherein in the aforementioned switching mechanism,
The passing member is a bolt for preventing expansion that prevents expansion of the viscous fluid container,
The through-hole is a retraction long hole of the expansion-preventing bolt. The vibration damping device according to claim 4, wherein the switching mechanism is provided at a portion where the passing member is in contact with an edge portion of the through hole, and is provided with a mechanism for reducing collision between the passing member and the edge portion of the through hole. Buffer mechanism.