JP6877720B2 - Vibration damping device for structures - Google Patents

Description

The present invention relates to a vibration damping device for a structure. Specifically, the present invention is a simplified structure of an inverted pendulum type capable of two-axis vibration damping using a leaf spring, and is suitable for a structure such as a detached house. It is related to a vibration damping device.

Conventionally, most of the vibration damping devices installed on medium- and low-rise structures such as detached houses are made of iron or concrete as the vibration damping device mass, and as a load supporting means of the vibration damping device mass, Laminated rubber, guide rail type with low coefficient of friction, pendulum type, etc. are often used.

Further, a viscous laminated rubber or the like is often used as a conventional damping device.

The most important point of such a vibration damping device is that the friction is small because of the vibration input level.

It is also important that the frequency can be easily adjusted, maintenance is not troublesome, and it is compact and inexpensive.

In Patent Document 1, the divided rectangular mass bodies in a plan view are arranged in a parallel state so as to leave a space between the long sides, and these divided mass bodies are in a horizontal state on the upper surface side thereof. The first vibration damping mass, the second vibration damping mass, and the first plate as a restoration mechanism are integrated by the mounting portions in the upward protruding state, which are installed at intervals in the longitudinal direction of the divided mass body. A spring and a second leaf spring as a restoring mechanism are provided, and the plate surface is orthogonal to the longitudinal direction of the split mass body at each of both end faces in the longitudinal direction of each split mass body of the first vibration damping mass. The lower end of the first leaf spring facing in the direction is attached in a fixed state, and the upper end of each first leaf spring is attached to the side of the vibration damping object in a fixed state, so that the first vibration damping mass is attached. Is suspended from the first leaf spring, and in the suspended state, the first spring can be flexed and vibrated while vibrating in the longitudinal direction of the split mass body. The lower end of the second leaf spring having the direction of the plate surface in the same direction as the plate surface of the first leaf spring is attached to each of both end surface portions of the second vibration damping mass in a fixed state, and each second leaf spring. By attaching the upper end portion of the two leaf springs to the respective mounting portions of the first vibration damping mass in a fixed state, the second vibration damping mass is suspended from the second leaf spring for the first vibration damping mass. The height dimension range is arranged so as to overlap the height dimension range of the divided mass body of the first vibration damping mass in the vertical direction between the divided mass bodies of the masses, and in the arranged state, the second spring A multi-series tuned mass damper configured to be able to perform a vibrating operation in the longitudinal direction of the split mass body of the first vibration damping mass while flexing and vibrating the spring is disclosed.

However, in the case of the multiple series type tuned mass damper of Patent Document 1, although it is configured using a plurality of leaf springs, it is not an inverted pendulum structure, and of course, it controls vibration only in one axial direction, and a plurality of leaf springs are used. It does not realize vibration damping in the biaxial directions (X direction and Y direction) based on a single configuration using a leaf spring.

Japanese Patent No. 4347737

The present invention has been made in view of the above circumstances, and is configured in an inverted pendulum shape capable of biaxial vibration damping using a leaf spring, and can cover a wide frequency range in the biaxial direction, and at the same time, has a frequency. Various simple means can be adopted for adjustment, and a vibration damping device for structures suitable for a structure such as a detached house, which has a very compact structure, is easy to maintain, and has a low manufacturing cost, is provided. To do.

The present invention is a vibration damping device for a structure having a quadrangular base plate and a quadrangular vibrating mass arranged above the base plate, and the vibrating mass has an inverted leaf spring pendulum structure. A vicinity in which both ends of the base plate are not in contact with the base plate while being arranged in the X direction above the positions near both sides of the base plate in the X direction and along the lower positions of both sides of the vibration mass in the X direction. Both X-direction leaf spring brackets hanging down to the position, a plurality of leaf spring lower fixing brackets arranged in the Y direction protruding in the X direction from the hanging lower ends of the both X-direction leaf spring brackets, and both the base plate. A plurality of first units for restoring Y-direction vibration, which are fixedly arranged at both ends between the X-direction side portion side and both X-direction leaf spring brackets and support both X-direction leaf spring brackets in a non-contact state on the base plate. A plurality of second parts for restoring vibration in the X direction, which are fixedly arranged at both ends between the leaf spring mechanism portion of the above, the plurality of leaf spring lower fixing metal fittings arranged in the Y direction, and the end faces of the vibration mass in the Y direction. The most main feature is to have a leaf spring mechanism portion of the above and a plurality of vibration damping dampers arranged between the base plate and the vibration mass.

According to the invention of claim 1, based on the structure of an inverted pendulum type capable of biaxial vibration damping using a leaf spring, it is possible to cover a wide frequency range in the biaxial direction, and at the same time, it has a very compact structure. Moreover, maintenance is easy and the manufacturing cost is low, and it is possible to realize and provide a suitable vibration damping device for a structure by applying it to a structure such as a detached house.

According to the inventions of claims 2 and 3, it is possible to cover a wide frequency range in the biaxial direction and at the same time, it is very compact based on the structure of an inverted pendulum that can suppress biaxial vibration using a leaf spring. It has a structure, is easy to maintain, and has a low manufacturing cost. Furthermore, the frequencies of the vibration mass in the X and Y directions are individually and simply simplified by using multiple pre-tension lateral coil springs in the X and Y directions. It is also possible to adjust, and it is possible to realize and provide a suitable vibration damping device for a structure by applying it to a structure such as a detached house.

According to the invention of claim 4, each of the spring end receivers in the invention of claim 3 includes a bolt with a hole for inserting and hooking one end of a pre-tension lateral coil spring, and thus the invention of claim 3. It is possible to realize and provide a vibration damping device for a structure, which has the same effect as that of the above and can facilitate the installation of a pre-tension lateral coil spring.

According to the invention of claim 5, the effect of the invention of any one of claims 1 to 4 is exhibited, the base plate is provided with a stopper mechanism, and a part of the stopper mechanism is vibrated. Since a high damping rubber for damping the vibration of the mass is provided, it is possible to realize and provide a vibration damping device for a structure capable of preventing excessive vibration of the vibration mass and enhancing the vibration damping effect of the vibration mass. ..

According to the inventions of claims 6 and 7, as in the inventions of claims 2 and 3, a wide frequency in the biaxial direction is based on an inverted pendulum type configuration capable of biaxial vibration damping using a leaf spring. At the same time as being able to cover the range, it has a very compact structure, is easy to maintain, and the manufacturing cost is low. Furthermore, the frequency of the vibration mass in the X and Y directions is individually set by the precompressed vertical coil spring. It is also possible to make simple adjustments, and it is possible to realize and provide a suitable vibration damping device for a structure by applying it to a structure such as a detached house.

According to the invention of claim 8, it is intended to realize and provide a vibration damping device for a structure which has the same effect as the invention of claims 6 and 7 and can prevent excessive vibration of a vibrating mass. Can be done.

FIG. 1 is a schematic plan view of a vibration damping device for a structure according to an embodiment of the present invention. FIG. 2 is a schematic front view of the vibration damping device for a structure according to the present embodiment. FIG. 3 is a schematic side view of the vibration damping device for a structure according to this embodiment. FIG. 4 is a graph showing the vibration characteristics of the vibration mass in the Y direction when the vibration damping device for a structure according to the present embodiment is vibrated in the X direction. FIG. 5 is a graph showing the vibration characteristics of the vibration mass in the X direction when the vibration damping device for a structure according to the present embodiment is vibrated in the X direction. FIG. 6 is a graph showing the vibration characteristics of the vibration mass in the Y direction at the time of vibration in the Y direction in the structural vibration damping device according to the present embodiment. FIG. 7 is a graph showing the vibration characteristics of the vibration mass in the X direction at the time of vibration in the Y direction in the structural vibration damping device according to the present embodiment. FIG. 8 is a graph showing a resonance vibration frequency setting example of Y-direction vibration transmission from the floor to the vibration mass in the structural vibration damping device according to the present embodiment. FIG. 9 is a graph showing a resonance vibration frequency setting example of X-direction vibration transmission from the floor to the vibration mass in the structural vibration damping device according to the present embodiment. FIG. 10 is a schematic plan view of a vibration damping device for a structure according to a modified example of the embodiment of the present invention. FIG. 11 is a schematic front view of the structural vibration damping device according to the modified example. FIG. 12 is a schematic side view of the vibration damping device for a structure according to a modified example.

The present invention is configured in an inverted pendulum shape capable of biaxial vibration control using a leaf spring, can cover a wide frequency range in the biaxial direction, and at the same time, various simple means can be adopted for adjusting the frequency. A square base plate for the purpose of realizing and providing a suitable structural vibration damping device by applying it to a structure such as a detached house, which has a very compact structure, is easy to maintain, and has a low manufacturing cost. A structure damping device having a square-shaped vibrating mass arranged above the base plate and having the vibrating mass having an inverted leaf spring pendulum structure, and positions near both sides of the base plate in the X direction. Both X-direction plates are arranged in the X-direction above and along the lower positions of both sides of the vibration mass in the X-direction, and both ends thereof hang down to a position close to the base plate in non-contact. A spring bracket, a plurality of leaf spring lower fixing brackets arranged in the Y direction protruding in the X direction from the hanging lower ends of the leaf spring brackets in both X directions, and both side portions in the X direction and both of the base plates. A plurality of first leaf spring mechanism portions for restoring Y-direction vibration, which are arranged so as to be fixed at both ends between the X-direction leaf spring bracket and support both X-direction leaf spring brackets in a non-contact state on the base plate, and the above. A plurality of leaf spring lower fixing brackets arranged in the Y direction, a plurality of second leaf spring mechanism portions for restoring X-direction vibration, which are fixedly arranged at both ends between the Y-direction end faces of the vibration mass, and the above. A substantially square frame-shaped auxiliary spring bracket arranged below the vibrating mass and connected to the vibrating mass at the inner position of both X-direction leaf spring brackets, and the X-direction and Y-direction of the base plate, respectively. Vibration response characteristics by pulling in advance the amount of displacement of the movable range spanned between a plurality of fixed spring support members erected near the sides and each side piece in the X direction and Y direction of the auxiliary spring bracket. This was realized by a configuration having a plurality of pre-tension lateral coil springs in the X-direction and the Y-direction so as to be within the linear range, and a plurality of vibration damping dampers arranged between the base plate and the vibration mass.

Hereinafter, the structural vibration damping device according to the embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 3, the structural vibration damping device 1 according to the present embodiment is a combination of a rectangular base plate 2 in a plan view and an upper mass 12 and a lower mass 13 arranged above the base plate 2. It has a vibration damping mass 11 for vibration damping, which has a rectangular shape in a plan view, and the vibration mass 11 is configured as an inverted leaf spring pendulum structure to control a relatively light weight structure such as a detached house. It is used for shaking.

In this embodiment, for convenience of explanation, the X direction and the Y direction of the structural vibration damping device 1 are defined as shown in FIG. 1, and the following description will be given.

The structural vibration damping device 1 according to the present embodiment is above the position near both sides of the base plate 2 in the X direction and along the lower positions of both sides of the upper mass 12 of the vibration mass 11 in the X direction. Both X-direction leaf spring brackets 21 including a horizontal piece 22 arranged in the X direction and both hanging pieces 23 hanging from both ends of the horizontal piece 22 to a position close to non-contact with the base plate 2. A plurality of leaf spring lower fixing brackets 24 arranged in the Y direction protruding from the lower end of each hanging piece 23 of both X-direction leaf spring brackets 21 in the X direction, and both side portions of the base plate 2 in the X direction. A leaf spring 32 is provided between the two X-direction leaf spring brackets 21 and the horizontal piece 22 of both X-direction leaf spring brackets 21 by using leaf spring mounting brackets 25 to fix both ends at a plurality of locations. Is arranged in the Y direction with the first leaf spring mechanism portion 31 having a plurality of (for example, 4 or 2 stations, 4 sets, 8 in total) configuration for restoring vibration in the Y direction, which supports the base plate 2 in a non-contact state. Similar to the leaf spring 32, which is fixed at both ends by using the leaf spring mounting bracket 25 between the plurality of leaf spring lower fixing brackets 24 and the Y-direction end surface of the upper mass 12 of the vibration mass 11. A second leaf spring mechanism 41 having a leaf spring 42 and having a plurality of (for example, 4 or 2 stations, 4 sets in total, 8 pieces) for restoring vibration in the X direction, and below the vibration mass 11. , A substantially square frame-shaped auxiliary spring bracket 51 arranged in a state of being connected to and interlocked with the vibration mass 11 at the inner position of both X-direction leaf spring brackets 21, and near each side of the base plate 2 in the X-direction and the Y-direction. A plurality of fixed spring support members 61 using bolts 62 and nuts 63 erected at positions (a total of 8 in the X direction and a total of 8 in the Y direction of the base plate 2 in FIG. 1) and the fixed spring support members. A plurality of bolts 55 and nuts 56 having holes 54 provided horizontally in the X-direction and Y-direction side pieces 52 and 53 of the auxiliary spring bracket 51 (in FIG. 1 in the X-direction). 8 pieces in total, 4 pieces in each side piece 52 of the above, and 4 pieces in total 8 pieces in each side piece 53 in the Y direction) Pre-tension for fine adjustment of vibrations in the X and Y directions (a total of 8 in the X direction and a total of 8 in the Y direction in FIG. 1) so that the vibration response characteristics are within the linear range. Arranged between the horizontal coil spring 71, the base plate 2 and the vibration mass 11. It has a plurality of (for example, two) damping dampers 81.

The hole 54 provided in the bolt 55 of the spring end receiver 57 is for the convenience of hooking one end side of the pre-tension lateral coil spring 71.

The structural vibration damping device 1 of the present embodiment further has a stopper mechanism portion 91 for preventing excessive vibration of the vibration mass 11 and a vibration damping device for the vibration mass 11 provided in a part of the stopper mechanism portion. It is provided with a high damping rubber 92 and an I-bolt 93 that is detachably screwed to the upper surface of the upper mass 12 for transportation and installation and is removed when unnecessary.

The pre-tension lateral coil spring 71 is formed by bending one end on the spring end receiver 57 side in an arc shape so as to be inserted into the hole 54 of the bolt 55 and hooked, and the other end is also the bolt 62 of the fixed spring support member 61. It is bent in an arc shape so as to hang on the outer circumference of the.

As the materials of the leaf springs 32 and 42, not only spring steel but also SK material, SUS material and the like can be adopted.

The stopper mechanism 91 exerts an action of absorbing the vibration energy in the event of a large earthquake or the like.

Since the high damping rubber 92 does not deteriorate unlike the laminated rubber type, the vibration damping device 1 for structures can be installed outdoors.

Next, the vibration damping operation of the structural vibration damping device 1 of the present embodiment will be described separately for the X-direction vibration and the Y-direction vibration, with reference to FIGS. 4 to 9. To do.

(At the time of vibration in the X direction)
In the structural vibration damping device 1 of the present embodiment, the floor (a part of the structure) on which the structural vibration damping device 1 is installed vibrates in the X direction, and this vibration is transmitted to the vibration mass 11 to vibrate. The case where the vibration damping by the mass 11 is executed will be described below.

The base plate 2 vibrates in the X direction in conjunction with the vibration of the floor in the X direction.

The vibration of the base plate 2 in the X direction passes through the leaf spring 32 of each of the first leaf spring mechanism portions 31, the leaf spring brackets 21 of both X directions, and the leaf spring 42 of each of the second leaf spring mechanism portions 41. It is transmitted to the vibration mass 11.

As a result, the vibrating mass 11 vibrates in the X direction, and at the same time, the auxiliary spring bracket 51 also vibrates in the X direction.

At this time, since the spring rigidity in the width direction of the leaf spring 32 of each of the first leaf spring mechanism portions 31 is large, the leaf spring 32 hardly elastically deforms in the X direction, and the leaf spring Since the vibration component in the Y direction is hardly transmitted to the 32, the vibration in the X direction of the base plate 2 passes through the leaf spring 32 of each of the first leaf spring mechanism portions 31 and the leaf spring brackets 21 in both X directions. It is transmitted to the lower part of the leaf spring 42 of the second leaf spring mechanism portion 41.

On the other hand, since the heavy vibration mass 11 is connected to the upper part of the leaf spring 42 of each of the second leaf spring mechanism portions 41, the leaf spring 42 of each of the second leaf spring mechanism portions 41 is X. Elastic deformation and restoration in the direction are repeated, and as a result, the vibration mass 11 vibrates in the X direction as shown in FIG. 5, and vibration suppression in the X direction is executed by the vibration mass 11.

When such vibration suppression in the X direction by the vibration mass 11 is executed, there is almost no vibration component in the Y direction with respect to the vibration mass 11, and the vibration in the Y direction of the vibration mass 11 is very small as shown in FIG.

Further, when the vibration damping in the X direction is executed by the vibration mass 11, each pre-tension lateral coil spring 71 arranged in the X direction expands and contracts based on the vibration response characteristic within the linear range.

(At the time of vibration in the Y direction)
In the structural vibration damping device 1 of the present embodiment, the floor (a part of the structure) on which the structural vibration damping device 1 is installed vibrates in the Y direction, and this vibration is transmitted to the vibration mass 11 to vibrate. The case where the vibration damping by the mass 11 is executed will be described below.

The base plate 2 vibrates in the Y direction in conjunction with the vibration of the floor in the Y direction.

The vibration of the base plate 2 in the Y direction passes through the leaf spring 32 of each of the first leaf spring mechanism portions 31, the leaf spring brackets 21 of both X directions, and the leaf spring 42 of each of the second leaf spring mechanism portions 41. It is transmitted to the vibration mass 11.

However, since both the X-direction leaf spring brackets 21 are rigid bodies and the leaf springs 42 of the second leaf spring mechanism portions 41 have high rigidity in the width direction (Y direction), the leaf springs 42 are in the Y direction. There is almost no elastic deformation in the leaf spring 42, and the vibration component in the X direction is hardly transmitted to the leaf spring 42. The leaf spring 42 of 41, the vibration mass 11, and the auxiliary spring bracket 51 are integrated.

As a result, as the base plate 2 vibrates in the Y direction, the leaf spring 32 of each of the first leaf spring mechanism portions 31 elastically deforms and restores in the Y direction while supporting each element including the vibration mass 11. However, it is in a state of vibration damping vibration in the Y direction.

That is, when the vibration mass 11 is vibrated in the Y direction, the vibration damping operation in the Y direction is performed based on the elastic deformation and restoration operation of the leaf spring 32 of each of the first leaf spring mechanism portions 31 in the Y direction. It is something to do.

Further, when vibration damping in the Y direction is executed by the vibration mass 11, each pre-tension lateral coil spring 71 arranged in the Y direction expands and contracts based on the vibration response characteristic within the linear range.

FIG. 6 shows the Y-direction vibration characteristic of the vibration mass 11 at the time of Y-direction vibration, and FIG. 7 shows the X-direction vibration characteristic of the vibration mass 11 at the time of Y-direction vibration, which is less than the Y-direction vibration characteristic. It is a thing.
By the way, many ordinary structures have a rectangular shape as a planar shape, and in this case, the frequencies of the two horizontal axes (X direction and Y direction) are different in many cases.

However, in the conventional vibration damping device (TMD), the spring constants that determine the frequency are not independent and interfere with each other, which makes the adjustment of the frequency complicated and difficult.

In this embodiment, the pre-tension coil springs 71 in the X-direction arrangement and the Y-direction arrangement in which the vibration response characteristics are set to be within the linear range by pulling the displacement amount in the movable range in advance for fine adjustment of the frequency. Since the pre-tension coil spring 71 is provided on the base plate 2, there is a great advantage that the frequencies of the two horizontal axes (X direction and Y direction) can be individually adjusted.

FIG. 8 shows an example of setting the resonance vibration frequency of the Y-direction vibration transmission from the floor to the vibration mass 11 in the structural vibration damping device 1 according to the present embodiment, and FIG. 9 shows the structural vibration damping device 1 according to the present embodiment. An example of setting the resonance vibration frequency of the X-direction vibration transmission from the floor to the vibration mass 11 in the vibration device 1 is shown.

That is, it means that the resonance vibration frequency at the time of Y-direction vibration transmission can be set to about 3.05 Hz, and the resonance vibration frequency at the time of X-direction vibration transmission can be set to 1.3 Hz independently.

As described above, according to the structural vibration damping device 1 of the present embodiment, the main device elements are only the vibration mass 2, the leaf springs 32 and 42, and the vibration damping damper 81, and the number of parts is small, which is very large. It has a compact structure, easy maintenance, and low manufacturing cost.

Further, the leaf springs 32 and 42 are used as an inverted pendulum type, so that the leaf springs 32 and 42 can be applied to vibration damping from a low frequency to a high frequency, and the leaf springs 32 and 42 have low friction. Since it elastically deforms only by the internal friction of the panel material, it has the advantage of having a large vibration damping effect.

Further, for the load support of the vibration mass 11, the leaf springs 32 and 42 are used in an inverted pendulum shape to cover a wide frequency range, and at the same time, the vibration control in the horizontal biaxial directions (X direction and Y direction) is horizontal 2 Of course, it is possible to set the vibration mass 11 to the same frequency in the axial direction, but it is also possible to set independent frequencies separately in the horizontal two-axis directions.

That is, the adjustment of the frequency of the vibrating mass 11 caused by the difference between the design value of the structure and the time of completion is mainly based on the thickness, width, and length of the leaf springs 32 and 42 that support the load. If necessary, the pre-tension coil spring 71 arranged in the X direction and the pre-tension coil spring 71 arranged in the Y direction can be easily and easily realized by replacing them with those having different vibration response characteristics.

As a result, it is possible to operate the vibration mass 11 in the horizontal two-axis directions without interfering with each other (without coupling), and therefore, there is an advantage that yawing does not occur.

Further, regarding the leaf springs 32 and 42, in the normal pendulum type, the support method of both ends is complicated and it is difficult to adjust the frequency according to the length, but in this embodiment, since the structure is fixed at both ends, it is fixed. Since the position can be easily moved, it is easy to adjust the frequency from this point as well.

(Modification example)
Next, the structural vibration damping device 1A according to the modified example of this embodiment will be described with reference to FIGS. 10 to 12.

In the structural vibration damping device 1A according to the modified example, the same elements as those in the case of the structural vibration damping device 1 according to the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. ..

The structure vibration damping device 1A according to the modified example shown in FIGS. 10 to 12 has a basic configuration substantially the same as that of the structure vibration damping device 1 according to the embodiment, but is located at the center of the base plate 2. An opening 2a is provided, and a substantially square frame-shaped auxiliary spring bracket 100 is horizontally arranged on both X-direction leaf spring brackets 21 below the vibration mass 11 and at a position inside the both X-direction leaf spring brackets 21. The base plate 2 and the auxiliary spring brat 100 are connected in advance by compressing the displacement amount of the movable range in the X-direction arrangement in advance to exhibit the vibration response characteristics utilizing the lateral rigidity (for example, a total of 8 pieces). By arranging the compressed vertical coil spring 111, a plurality of vibration response characteristics utilizing the lateral rigidity are exhibited by pre-compressing the displacement amount of the movable range in the Y direction arrangement between the auxiliary spring bracket 100 and the vibration mass 11. The feature is that the precompressed vertical coil springs 121 (8 in total) are arranged, and the remaining configuration is the same as in the case of the above-described embodiment.

In the structural vibration damping device 1A according to the modified example, similarly to the case of the structural vibration damping device 1 of the above-described embodiment, the second leaf spring mechanism portion 41 is used during vibration in the X direction. In accordance with the elastic deformation and restoration action of the leaf spring 42 in the X direction, the vibration damping operation in the X direction is executed by the vibration mass 11, and when the leaf spring 42 is vibrated in the Y direction, the first leaf spring mechanism portion 31 The vibration damping operation in the Y direction is executed by the vibration mass 11 along with the elastic deformation and restoration action of the leaf spring 32 in the Y direction.

In this case, in the structural vibration damping device 1A according to the modified example, the auxiliary spring bracket 100 is the X-direction leaf spring bracket 21, the first leaf spring mechanism portion 31, and the base plate at the time of vibration in the X direction. The auxiliary spring bracket 100 is displaced in the X direction at a frequency different from the vibration of the vibration mass 11 in the X direction.

As a result, the precompressed vertical coil spring 121 arranged in the Y direction arranged on the auxiliary spring bracket 100 swings and displaces in the X direction with a vibration response characteristic utilizing the lateral rigidity.

On the other hand, in the structural vibration damping device 1A according to the modified example, when vibrating in the Y direction, the vibration mass is accompanied by the elastic deformation and the restoring action of the leaf spring 32 of the first leaf spring mechanism portion 31 in the Y direction. When the vibration damping operation in the Y direction is executed by 11, the vibration mass 11, the second leaf spring mechanism portion 41, and the auxiliary spring bracket 100 are integrally vibrated in the Y direction on the base plate 2. The auxiliary spring bracket 100 is displaced in the Y direction at a frequency different from the vibration of the base plate 2 in the Y direction.

As a result, the precompressed vertical coil springs 111 arranged in the X direction arranged on the auxiliary spring bracket 100 are oscillated and displaced in the Y direction with a vibration response characteristic utilizing the lateral rigidity.

According to the structural vibration damping device 1A of the modified example described above, the structural vibration damping device of the embodiment except that the precompressed vertical coil springs 111 and 121 are used instead of the pretension lateral coil spring 71. The same effect as in the case of 1 is obtained.

A plurality of the precompressed vertical coil springs 111 and 121 are installed in a vertical arrangement in a precompressed state so as to have an effective distance of about 5 to 10 mm shorter than the free length. It is used and used in a linear range.

Since the precompressed vertical coil springs 111 and 121 are each set to have extremely small spring constants, precompression can be performed with one hand and can be easily installed at the above-mentioned locations.

Further, the precompressed vertical coil springs 111 and 121 used for frequency adjustment all utilize the lateral rigidity, and these precompressed vertical coil springs 111 and 121 are used as precompressed vertical coil springs having different lateral rigidity. By replacing the vibration mass 11, the vibration damping operation in the horizontal biaxial direction can be individually adjusted without causing interference with each other.

In the structural vibration damping devices 1 and 1A of the above-described examples and modifications, both the pre-tension horizontal coil spring 71 and the pre-compression vertical coil springs 111 and 121 may be used in combination depending on the frequency adjustment range of the target structure. It is possible.

In either case, by using a plurality of the X-axis and the Y-axis independently, it is possible to adjust to a fine frequency range.

Further, in the structural vibration damping devices 1 and 1A of the above-described examples and modifications, the base plate 2 can be mounted upside down, for example, on the ceiling surface of the structure, and the leaf springs are fixed at both ends. It can also be applied as a biaxially independent type and as a pendulum type with a suspension structure of the vibration mass 11.

Further, if a plurality of the above-mentioned structure vibration damping devices 1 and 1A are used, it is possible to set each of them to a multi-type vibration damping frequency, and the frequency of each structure at the time of an earthquake or the like. It becomes simpler to adapt to.

The vibration damping device for structures of the present invention is widely applied not only when it is mainly used for vibration damping of a detached house, but also for vibration damping of, for example, precision machinery, precision electronic equipment, and relatively small-scale structures. It is possible.

1 Structural damping device 1A Structural damping device 2 Base plate 2a Opening 11 Vibration mass 12 Upper mass 13 Lower mass 21 X-direction leaf spring bracket 22 Horizontal piece 23 Hanging piece 24 Leaf spring lower fixing bracket 25 Leaf spring Mounting bracket 31 1st leaf spring mechanism 32 Leaf spring 41 2nd leaf spring mechanism 42 Leaf spring 51 Auxiliary spring bracket 52 Side piece 53 Side piece 54 Hole 55 Bolt 56 Nut 57 Spring end receiver 61 Fixed spring Support material 62 Bolt 63 Nut 71 Pre-tension lateral coil spring 81 Anti-vibration damper 91 Stopper mechanism 92 High damping rubber 93 I bolt 100 Auxiliary spring bracket 111 Pre-compression vertical coil spring 121 Pre-compression vertical coil spring

Claims (8)

A structure damping device having a square-shaped base plate and a square-shaped vibrating mass arranged above the base plate, and the vibrating mass having an inverted leaf spring pendulum structure.
It is arranged in the X direction above the positions near both sides of the base plate in the X direction and along the lower positions of both sides of the vibration mass in the X direction, and both ends thereof are not in contact with the base plate. Both X-direction leaf spring brackets that hang down to a nearby position,
A plurality of leaf spring lower fixing brackets arranged in the Y direction, each protruding in the X direction from the hanging lower end of both X-direction leaf spring brackets.
For Y-direction vibration restoration, which is fixedly arranged at both ends between both X-direction side portions of the base plate and both X-direction leaf spring brackets and supports both X-direction leaf spring brackets in a non-contact state on the base plate. With a plurality of first leaf spring mechanism parts,
A plurality of leaf spring lower fixing brackets arranged in the Y direction, and a plurality of second leaf spring mechanism portions for restoring vibration in the X direction, which are fixedly arranged at both ends between the end faces of the vibration mass in the Y direction.
A plurality of damping dampers arranged between the base plate and the vibration mass,
A vibration damping device for a structure, which is characterized by having. A structure damping device having a square-shaped base plate and a square-shaped vibrating mass arranged above the base plate, and the vibrating mass having an inverted leaf spring pendulum structure.
It is arranged in the X direction above the positions near both sides of the base plate in the X direction and along the lower positions of both sides of the vibration mass in the X direction, and both ends thereof are not in contact with the base plate. Both X-direction leaf spring brackets that hang down to a nearby position,
A plurality of leaf spring lower fixing brackets arranged in the Y direction, each protruding in the X direction from the hanging lower end of both X-direction leaf spring brackets.
For Y-direction vibration restoration, which is fixedly arranged at both ends between both X-direction side portions of the base plate and both X-direction leaf spring brackets and supports both X-direction leaf spring brackets in a non-contact state on the base plate. With a plurality of first leaf spring mechanism parts,
A plurality of leaf spring lower fixing brackets arranged in the Y direction, and a plurality of second leaf spring mechanism portions for restoring vibration in the X direction, which are fixedly arranged at both ends between the end faces of the vibration mass in the Y direction.
A substantially square frame-shaped auxiliary spring bracket arranged below the vibration mass and in a state of being connected to both X-direction leaf spring brackets at the inner position of both X-direction leaf spring brackets.
The movable range spanned between a plurality of fixed spring support members erected near each side of the base plate in the X and Y directions and one side of the auxiliary spring bracket in the X and Y directions. A plurality of pre-tension lateral coil springs in the X and Y directions in which the amount of displacement is pulled in advance so that the vibration response characteristics are within the linear range.
A plurality of damping dampers arranged between the base plate and the vibration mass,
A vibration damping device for a structure, which is characterized by having. A structure damping device having a square-shaped base plate and a square-shaped vibrating mass arranged above the base plate, and the vibrating mass having an inverted leaf spring pendulum structure.
From a horizontal piece arranged in the X direction above the position near both sides of the base plate in the X direction and along the lower positions of both sides of the vibration mass in the X direction, and from both ends of the horizontal piece. Both X-direction leaf spring brackets including both hanging pieces hanging to a position close to the base plate in non-contact, and
A plurality of leaf spring lower fixing brackets arranged in the Y direction protruding in the X direction from the lower end of each hanging piece of both X-direction leaf spring brackets, and
Y-direction vibration that is fixedly arranged at both ends between both sides of the base plate in the X direction and the horizontal piece of the leaf spring bracket in both X directions and supports the leaf spring brackets in both X directions in a non-contact state on the base plate. A plurality of first leaf spring mechanism parts for restoration and
A plurality of leaf spring lower fixing brackets arranged in the Y direction, and a plurality of second leaf spring mechanism portions for restoring vibration in the X direction, which are fixedly arranged at both ends between the end faces of the vibration mass in the Y direction.
A substantially square frame-shaped auxiliary spring bracket arranged below the vibration mass and in a state of being connected to both X-direction leaf spring brackets at the inner position of both X-direction leaf spring brackets.
A plurality of fixed spring support members erected near each side of the base plate in the X and Y directions, and a plurality of spring end receivers provided on each side of the auxiliary spring bracket in the X and Y directions. Multiple pre-tension lateral coil springs in the X and Y directions, in which the amount of displacement of the movable range spanned between the two is pulled in advance so that the vibration response characteristics are within the linear range.
A plurality of damping dampers arranged between the base plate and the vibration mass,
A vibration damping device for a structure, which is characterized by having. The vibration damping device for a structure according to claim 3, wherein each spring end receiver includes a bolt with a hole through which one end of a pre-tensioned lateral coil spring is inserted and fastened. The base plate is provided with a stopper mechanism for preventing excessive vibration of the vibration mass, and a part of the stopper mechanism is provided with a high damping rubber for damping the vibration of the vibration mass. The vibration damping device for a structure according to any one of 4. A structure damping device having a square-shaped base plate and a square-shaped vibrating mass arranged above the base plate, and the vibrating mass having an inverted leaf spring pendulum structure.
It is arranged in the X direction above the positions near both sides of the base plate in the X direction and along the lower positions of both sides of the vibration mass in the X direction, and both ends thereof are not in contact with the base plate. Both X-direction leaf spring brackets that hang down to a nearby position,
A plurality of leaf spring lower fixing brackets arranged in the Y direction, each protruding in the X direction from the hanging lower end of both X-direction leaf spring brackets.
For Y-direction vibration restoration, which is fixedly arranged at both ends between both X-direction side portions of the base plate and both X-direction leaf spring brackets and supports both X-direction leaf spring brackets in a non-contact state on the base plate. With a plurality of first leaf spring mechanism parts,
A plurality of leaf spring lower fixing brackets arranged in the Y direction, and a plurality of second leaf spring mechanism portions for restoring vibration in the X direction, which are fixedly arranged at both ends between the end faces of the vibration mass in the Y direction.
A substantially square frame-shaped auxiliary spring bracket arranged below the vibration mass and in a state of being connected to the both X-direction leaf spring brackets at the inner position of the both X-direction leaf spring brackets.
A plurality of precompressions that exert vibration response characteristics utilizing lateral rigidity by pre-compressing the displacement amount of the movable range arranged between the base plate and the auxiliary spring bracket and between the auxiliary spring bracket and the vibration mass. Vertical coil spring and
A plurality of damping dampers arranged between the base plate and the vibration mass,
A vibration damping device for lightweight structures, which is characterized by having. A structure damping device having a square-shaped base plate and a square-shaped vibrating mass arranged above the base plate, and the vibrating mass having an inverted leaf spring pendulum structure.
From a horizontal piece arranged in the X direction above the position near both sides of the base plate in the X direction and along the lower positions of both sides of the vibration mass in the X direction, and from both ends of the horizontal piece. Both X-direction leaf spring brackets including both hanging pieces hanging to a position close to the base plate in non-contact
A plurality of leaf spring lower fixing brackets arranged in the Y direction protruding in the X direction from the lower end of each hanging piece of both X-direction leaf spring brackets, and
Both corners of the base plate in the X direction and the horizontal pieces of the leaf spring brackets in both X directions are fixedly arranged at both ends, and the leaf spring brackets in both X directions are supported on the base plate in a non-contact state in the Y direction. A plurality of first leaf spring mechanism parts for vibration restoration, and
A plurality of leaf spring lower fixing brackets arranged in the Y direction, and a plurality of second leaf spring mechanism portions for restoring vibration in the X direction, which are fixedly arranged at both ends between the end faces of the vibration mass in the Y direction.
A substantially square frame-shaped auxiliary spring bracket arranged below the vibration mass and in a state of being connected to the both X-direction leaf spring brackets at the inner position of the both X-direction leaf spring brackets.
Vibration response characteristics using lateral rigidity are obtained by pre-compressing the displacement amount of the movable range arranged between the base plate and the auxiliary spring brat in the X direction arrangement and between the auxiliary spring bracket and the vibration mass in the Y direction arrangement. Multiple pre-compressed vertical coil springs to exert,
A plurality of damping dampers arranged between the base plate and the vibration mass,
A vibration damping device for lightweight structures, which is characterized by having. The vibration damping device for a structure according to claim 6 or 7, wherein the base plate includes a stopper mechanism portion for preventing excessive vibration of the vibration mass.

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