JP7503428B2 - Vibration control device - Google Patents

Description

The present invention relates to a vibration control device in which a vibration control device with earthquake resistance and vibration control functions is placed inside a square frame formed by four members that make up a structure, and can be used, for example, in buildings constructed using the wooden frame construction method.

The following Patent Document 1 shows a vibration control device in which a vibration control device is placed inside a square frame formed of four members, such as two left and right columns, a foundation, and beams, that constitute a structure such as a house, and the vibration control device is connected to the square frame with a fastener, so that the vibration control device exerts an earthquake-resistant function and a vibration-control function when an earthquake or the like occurs. The vibration control device in this vibration control device consists of two left and right strength plates, each of which is connected to two left and right columns with a fastener and whose thickness direction is the penetration direction of the square frame, two plate members connected to these strength plates, and a viscoelastic member made of synthetic resin that is sandwiched between the two plate members and arranged between the strength plates. When an earthquake or the like occurs, the two left and right strength plates resist the bending and deformation of the two left and right columns due to vibration energy, thereby generating an earthquake-resistant function, and the vibration control function is generated by absorbing the vibration energy with a viscoelastic damper made of two plate members and a viscoelastic member, so that the square frame does not deform significantly and the vibration of the square frame is attenuated.

For this reason, in this vibration control device, two earthquake-resistant sections are formed on the left and right to resist bending deformation of the two left and right columns by two load-bearing plates placed in the center between the two left and right columns and in two locations between each of these columns, and a vibration control section is formed by a viscoelastic damper made of two plate members and a viscoelastic member placed in the center between the two left and right columns to absorb vibration energy and control vibration.

JP 2009-256915 A (FIG. 1)

In the above vibration control device, the vibration control device is placed inside a square frame and connected to the square frame by fasteners, and in order to provide the vibration control device with both earthquake resistance and vibration control functions, the vibration control device is constructed using two load-bearing plates on the left and right, two plate members connected to the load-bearing plates, and a viscoelastic member sandwiched between the plate members.

The object of the present invention is to provide a vibration control device that has both earthquake resistance and vibration control functions, and that can be configured with a vibration control device that is placed inside a square frame and connected to the square frame with a fastener, with a simplified shape and structure.

The vibration control device according to the present invention is a vibration control device that includes a vibration control device that is arranged inside a square frame formed by four members including two left and right columns that constitute a structure, and a fastener for connecting the vibration control device to the square frame, and the vibration control device has two left and right earthquake-resistant sections that are arranged at the center between the two left and right columns and at two locations between each of the two left and right columns to resist bending deformation of the two left and right columns due to vibration energy acting on the square frame, and a vibration control section that is arranged at the center between the two left and right columns to absorb the vibration energy and control vibration. In this vibration control device, the vibration control device is characterized in that it includes at least one metal plate arranged between the two left and right columns, and the two left and right earthquake-resistant sections and the vibration control section are formed by different parts of the metal plate whose thickness direction is in the penetrating direction of the square frame.

In this way, the vibration control device according to the present invention is placed inside a square frame formed by four members, including two left and right columns that make up the structure, and the vibration control device connected to this square frame by fasteners is composed of at least one metal plate placed between the two left and right columns, and the two left and right earthquake-resistant and vibration-control sections are formed by different parts of this metal plate whose thickness direction is the penetration direction of the square frame. Therefore, a vibration control device with both earthquake-resistant and vibration-control functions can be constructed with a simplified shape and structure, which reduces the manufacturing cost of the vibration control device and makes it easier to place the vibration control device inside the square frame.

In addition, because the two earthquake-resistant and vibration-damping sections on the left and right are formed from different parts of the same metal plate, the vibration energy acting on the square frame can be transmitted directly from the earthquake-resistant sections to the vibration-damping sections. This allows the vibration energy acting on the earthquake-resistant sections to act on the vibration-damping sections instantly, without any time lag, improving vibration-damping performance.

In the vibration control device according to the present invention described above, in order to provide the vibration control device, which is placed inside the square frame and connected to the square frame with a fastener, with both earthquake resistance and vibration control functions, for example, each of the two left and right earthquake resistance sections may be a large area section of the metal plate having vertical and horizontal dimensions, and these large area sections may be connected by a vibration control section, and the vibration control section may be a narrow section of the metal plate whose vertical dimension is smaller than the vertical dimension of the large area section and whose length is in the horizontal direction, and the vibration control section may absorb the vibration energy by plastically deforming this narrow section due to vibration energy.

As described above, each of the two left and right earthquake-resistant sections is a large-area section of the metal plate having a vertical dimension and a horizontal dimension, and these large-area sections are connected by a vibration-damping section, which is a narrow section of the metal plate whose vertical dimension is smaller than the vertical dimension of the large-area section and has a horizontal length, and when this narrow section is plastically deformed by vibration energy to cause the vibration-damping section to absorb vibration energy, it is preferable that the connection section between the vibration-damping section and the earthquake-resistant section in the length direction be a flared connection section by making both the upper and lower sides of this connection section be sides that are curved in a flared shape toward the earthquake-resistant section.

According to this, the connection portion between the vibration-damping portion and the earthquake-resistant portion in the longitudinal direction is a flared connection portion by making both the upper and lower sides of this connection portion bent in a flared shape toward the earthquake-resistant portion, so that stress concentration between the earthquake-resistant portion and the vibration-damping portion can be eliminated when vibration energy is transmitted from the earthquake-resistant portion to the vibration-damping portion. This makes it possible to more reliably cause plastic deformation due to vibration energy in the vibration-damping portion to which vibration energy is transmitted from the earthquake-resistant portion, thereby improving the vibration-damping function of the vibration-damping portion that absorbs vibration energy.

As described above, each of the two left and right earthquake-resistant sections is a large-area section of the metal plate having vertical and horizontal dimensions, and these large-area sections are connected by a vibration-damping section, which is a narrow section of the metal plate whose vertical dimension is smaller than the vertical dimension of the large-area section and has a horizontal length, and in the case where the vibration-damping section absorbs vibration energy by plastically deforming this narrow section due to vibration energy, the number of vibration-damping sections provided as narrow sections on the metal plate may be one, or may be multiple sections provided with vertical spacing.

In the latter case, when the number of vibration-damping sections provided as narrow sections on the metal plate is multiple and spaced apart from each other above and below, the vibration energy transmitted from the earthquake-resistant section can be absorbed more effectively by the multiple vibration-damping sections.

In addition, when the number of vibration-damping parts provided as narrow width parts on the metal plate is multiple and spaced apart from each other vertically, the space between two adjacent vibration-damping parts vertically is an opening formed in the metal plate. When the number of openings is multiple and spaced from each other vertically, the area of each opening may be the same, or at least one of these openings may have a larger opening area than the remaining openings.

In the latter case, if at least one of the multiple openings provided above and below has a larger opening area than the remaining openings, when a wall panel is attached to the surface of the square frame with the vibration damper placed inside and an electrical device such as an electrical switch is placed on this panel, the electrical wiring extending from the electrical device can be easily routed inside the square frame by passing it through the opening with the larger opening area.

As described above, the metal plate that constitutes the vibration-damping device is placed inside the square frame, and the two left and right earthquake-resistant sections and vibration-damping sections are formed by different parts of this metal plate whose thickness direction is the penetration direction of the square frame. This can be achieved by using only one metal plate, or by using multiple metal plates arranged side by side in the penetration direction of the square frame.

In the former case, where only one metal plate is used, two flange members can be fixed to the left and right ends of the metal plate by welding or other means, and these flange members can be connected to the two left and right pillars that form a square frame with fasteners such as wood screws, so that one metal plate is placed between the two left and right pillars.

In addition, when two flange members are fixed to the left and right ends of a single metal plate in this manner and these flange members are joined to two left and right columns forming a square frame with fasteners, and a single metal plate is placed between the two left and right columns, recesses may be provided at the top and bottom ends of the two left and right flange members so that the shafts of temporary fasteners can be inserted to temporarily fasten the two left and right flange members to the two left and right columns with the temporary fasteners before these flange members are joined to the two left and right columns with the fasteners.

By doing this, before the two flange members are joined to the two columns by the fasteners, the shaft of the temporary fastener can be inserted into the recesses at the top and bottom ends of the two flange members, allowing the two flange members to be temporarily fastened to the two columns by the temporary fasteners. This means that the work of joining the two flange members to the two columns by the fasteners can be easily and quickly performed by a single worker.

It is preferable that the recesses at both the top and bottom ends of the two left and right flange members be V-shaped.

In this way, by making the recesses on both the top and bottom ends of the two flange members V-shaped, the temporary fastening fixture can temporarily fasten the two flange members to the two columns on the left and right without moving in the vertical direction and in the direction of penetration of the square frame, regardless of the diameter of the shaft.

In addition, as described above, when two flange members are fixed to both the left and right ends of a single metal plate and these flange members are joined by fasteners to two columns forming a square frame, and a single metal plate is placed between the two columns, it is preferable to display marks on the opposing sides of the two columns indicating the position in the penetrating direction of the square frame on the column where the single metal plate is to be placed, and to provide marks on the two flange members indicating the position of the single metal plate, the left and right ends of which are fixed to these flange members, and to provide marks that indicate the position of the single metal plate, the left and right ends of which are fixed to the flange members, by joining the two flange members to the two columns in line with the marks, so that the single metal plate is placed at the position in the penetrating direction of the square frame on the column where the single metal plate is to be placed.

By aligning the marks displayed on the opposing sides of the two left and right columns with the marks on the two left and right flange members and joining the two left and right flange members to the two left and right columns with fasteners, the single metal plate can be accurately positioned in the direction of penetration of the square frame on the column where the single metal plate should be placed, thereby allowing the original earthquake resistance provided by the two left and right earthquake resistance sections and the original vibration control function provided by the vibration control section to be fully exerted.

The marks displayed on the opposing sides of the two pillars on the left and right may be vertical lines, or may be shapes such as triangles with corners facing up and down.

The marks on the two flange members, left and right, may be vertical lines on the top and bottom ends of these flange members, or may be figures such as triangles with corners facing up and down, or may be triangular protrusions formed on the top and bottom ends of the flange members that protrude outward in the length direction of the flange members, which is the up and down direction, or may be V-shaped recesses recessed inward in the length direction of the flange members, which is the up and down direction, on the top and bottom ends of the flange members.

Furthermore, if the marks on the two left and right flange members are V-shaped recesses recessed inward in the length direction of the flange members, which is the up-down direction, at both the top and bottom ends of the flange members, these V-shaped recesses can be used as V-shaped recesses into which the shank of the temporary fastener described above can be inserted, so that the V-shaped recesses for inserting the shank of the temporary fastener can also be used as marks on the two left and right flange members. This eliminates the need to provide both marks and V-shaped recesses on the two left and right flange members, which makes it easier to manufacture the two left and right flange members.

In addition, when the number of metal plates is one as described above, this metal plate has a main body portion on which the two earthquake-resistant and vibration-damping portions described above are provided, and two end portions on the left and right sides of the main body portion, which are provided by bending the main body portion in the penetrating direction of the square frame. These end portions can be connected to the two left and right pillars that form the square frame with fasteners such as wood screws, so that one metal plate is placed between these pillars and connected to the square frame.

This allows a single metal plate to be provided with two earthquake-resistant sections (left and right), a vibration-damping section, and both left and right ends that are connected to two columns (left and right) with fasteners, further simplifying the shape and structure of the vibration-damping device.

In this way, when two earthquake-resistant sections, a vibration-damping section, and both left and right ends that are connected to two columns with fasteners are provided on a single metal plate, the bending directions of both left and right ends that are bent in the penetrating direction of the square frame relative to the main body on which the two earthquake-resistant sections and vibration-damping sections are provided may be the same or opposite to each other.

In addition, in the vibration damping device of the present invention, the number of metal plates may be at least two, including a first metal plate and a second metal plate arranged side by side in the penetration direction of the square frame. In this way, when the number of metal plates is at least two, including the first metal plate and the second metal plate arranged side by side in the penetrating direction of the square frame, the first metal plate has a main body with two left and right earthquake-resistant and vibration-damping parts, and two left and right ends on the left and right outside of this main body, which are provided by bending the main body to the opposite side from the second metal plate in the penetrating direction of the square frame, and these ends are connected to the two left and right pillars with fasteners such as wood screws, so that the first metal plate is placed between the two left and right pillars and connected to the square frame, and the second metal plate has a main body with two left and right earthquake-resistant and vibration-damping parts, and two left and right ends on the left and right outside of this main body, which are provided by bending the main body of the second metal plate to the opposite side from the first metal plate in the penetrating direction of the square frame, and these ends are connected to the two left and right pillars with fasteners such as wood screws, so that the second metal plate is placed between the two left and right pillars and connected to the square frame.

Furthermore, in the vibration-damping device according to the present invention, when the number of metal plates is at least two, including a first metal plate and a second metal plate arranged side by side in the penetrating direction of the square frame, a third metal plate may be disposed between the first metal plate and the second metal plate, and this third metal plate may also be provided with two earthquake-resistant sections and a vibration-damping section on the left and right.

In addition, when the number of metal plates is at least two, including the first metal plate and the second metal plate arranged side by side in the penetration direction of the square frame, as described above, or when a third metal plate is disposed between the first metal plate and the second metal plate, these metal plates may be connected to each other at two earthquake-resistant sections on the left and right sides provided on these metal plates.

As a result, the multiple metal plates arranged in parallel in the penetrating direction of the square frame are connected to each other at the earthquake-resistant section, so the multiple metal plates can be integrated together to increase the earthquake resistance of the earthquake-resistant section, and since the multiple metal plates are not connected to each other at the vibration-damping section, the original vibration-damping function of the vibration-damping section provided on each metal plate can be fully exerted.

As described above, the multiple metal plates arranged in parallel in the penetrating direction of the square frame can be connected together at the earthquake-resistant parts provided on these metal plates using a bolt and nut type fastening connector in which the shaft of a bolt is inserted into a hole formed in the earthquake-resistant parts and a nut screwed onto the end of the shaft is fastened, or using a rivet type fastening connector in which a rivet is inserted into a hole formed in the earthquake-resistant parts of the multiple metal plates, or using a welding type connection in which the earthquake-resistant parts of the multiple metal plates are connected by spot welding.

In addition, multiple metal plates may be connected together in the vibration-damping section using bolts, nut-type fastening connectors, rivet-type fastening connectors, welding connectors, etc., as described above.

The vibration control device according to the present invention described above can be used in any structure that has a square frame formed by four members including two columns on the left and right. This structure can be a building, bridge, or other structure constructed using a wooden frame construction method, or a building, bridge, or other structure constructed using a steel frame construction method using steel frames including light-gauge steel frames.

The present invention has the effect of making it possible to construct a vibration control device with a simplified shape and structure, which has both earthquake resistance and vibration control functions and is attached to the inside of a square frame by fasteners.

FIG. 1 is a front view showing an entire vibration damping device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line S2-S2 of FIG. FIG. 3 is a cross-sectional view taken along line S3-S3 in FIG. FIG. 4 is an overall perspective view showing a vibration damper of the vibration damping device shown in FIG. FIG. 5 is an overall front view of the vibration damper. FIG. 6 is a cross-sectional view taken along line S6-S6 in FIG. FIG. 7 is a cross-sectional view taken along line S7-S7 in FIG. FIG. 8 is an enlarged perspective view showing the V-shaped recesses provided at both the upper and lower ends of the flange member of the vibration damper. FIG. 9 is a view similar to FIG. 8, showing the flange member temporarily fastened to the pillar of the square frame by the temporary fastener having the shaft portion inserted into the V-shaped recess. FIG. 10 is a view similar to FIG. 1, showing a state in which vibration energy due to a lateral load acts on the square frame. FIG. 11 is a front view showing deformation of the vibration damping portion of the vibration damper in the state shown in FIG. 10 by a two-dot chain line. FIG. 12 is a view similar to FIG. 1, but showing an embodiment in which one of the two pillars on the left and right that form the square frame is a through pillar. FIG. 13 is a view similar to FIG. 1, showing an embodiment in which a plurality of vibration damping devices are arranged in series in the left-right direction. FIG. 14 is a view similar to FIG. 4, but showing another embodiment in which the vibration damper is made up of a single metal plate. FIG. 15 is a view similar to FIG. 3, but showing an alternative embodiment to that of FIG. FIG. 16 is a view similar to FIG. 3, but showing an embodiment in which the vibration damper is made up of two metal plates. FIG. 17 is a view similar to FIG. 3, but showing an embodiment in which the vibration damper is made up of three metal plates.

The following describes an embodiment of the present invention with reference to the drawings. Figure 1 shows an overall front view of a vibration damping device according to this embodiment, which is used in a structure such as a house constructed using a wooden frame construction method, and therefore a square frame 5 formed of four members, two wooden pillars 1 and 2 on the left and right, a base 3, and a beam 4, is provided as part of the structure. The surface of this square frame 5 is made of a surface material such as gypsum board, which is fastened to the two wooden pillars 1 and 2 on the left and right with fasteners such as wood screws, forming a part that forms the wall of the structure. Before these surface materials are attached, the vibration damping device 10 of the vibration damping device is placed inside the square frame 5. This vibration damping device 10 is composed of one metal plate 11 that is the main body member of the vibration damping device 10, two flange members 12 (left and right) that are fixed by welding to both left and right ends of this metal plate 11, whose thickness direction is the penetration direction of the square frame 5, and multiple reinforcing members 13 that are arranged above and below both left and right ends of the metal plate 11 and are fixed to the metal plate 11 and the flange members 12 by welding.

Figure 2 is a cross-sectional view of line S2-S2 in Figure 1, and Figure 3 is a cross-sectional view of line S3-S3 in Figure 1. As can be seen from Figures 2 and 3, each flange member 12, whose length direction is the vertical direction, is a vertically elongated plate member whose width direction is the penetration direction of the square frame 5. At the center position in the width direction of these flange members 12, both left and right ends of the metal plate 11 are fixed to the flange members 12 by welding, and each flange member 12, whose width dimension is larger than the thickness dimension of the metal plate 11, is connected to two columns 1 and 2 on the left and right by multiple upper and lower wood screws 14, which are fasteners, on both sides in the thickness direction of the metal plate 11. As a result, the vibration damper 10, which is composed of the metal plate 11, two flange members 12 on the left and right, and multiple reinforcing members 13, is connected to the square frame 5 at the two columns 1 and 2 on the left and right by the wood screws 14, and a vibration damping device composed of the vibration damper 10 and wood screws 14 is placed inside the square frame 5.

In FIG. 1, two vibration dampers 10 are arranged at an upper and lower level with a gap between them inside the rectangular frame 5.

Figure 4 shows an overall perspective view of the vibration damper 10, Figure 5 shows an overall front view of the vibration damper 10, Figure 6 shows a cross-sectional view taken along the line S6-S6 in Figure 5, and Figure 7 shows a cross-sectional view taken along the line S7-S7 in Figure 5. The metal plate 11, which is the main body member of the vibration damper 10, is made of steel or aluminum alloy or the like, and is formed into a shape that is symmetrical in both the left and right and the top and bottom by punching or laser processing. As shown in Figure 5, at the top and bottom of such a metal plate 11, cut-out portions 20 are formed by cutting large portions into the inside of the metal plate 11, and these cut-out portions 20 are further provided with recessed portions 21 recessed into the inside of the metal plate 11, so that two recessed portions 21 are provided at the top and bottom of the metal plate 11. The center positions of these recessed portions 21 in the left-right direction coincide with the position where the center line N in the left-right direction of the entire vibration damper 10 passes, and four openings 22 and one opening 23 are formed between these recessed portions 21 at intervals in the top and bottom. Of these openings 22, 23, the two openings 22 provided above and below opening 23 have the same shape and dimensions, and these openings 22 are horizontally elongated openings whose left-right dimension is greater than their up-down dimension, and opening 23 has the same left-right dimension as opening 22, but a larger up-down dimension than opening 22.

As described above, in this embodiment, when the two flange members 12 fixed to both the left and right ends of the metal plate 11 are connected to the two left and right pillars 1, 2 that are constituent members of the square frame 5 by wood screws 14, the total of five openings 22, 23 formed in the metal plate 11 in the vertical direction are positioned in the center between the two left and right pillars 1, 2, and one of these openings 22, 23 has an opening area larger than the remaining four openings 22.

As shown in FIG. 5, the left and right sides of the openings 22 and 23 of the metal plate 11 are large-area portions that do not have openings that penetrate the thickness of the metal plate 11, and these large-area portions, each having a vertical dimension and a horizontal dimension, are earthquake-resistant portions 24 of the metal plate 11. As shown in FIG. 5, these earthquake-resistant portions 24, which are expanded outward in the horizontal direction as a whole by the above-mentioned two upper and lower cuts 20, are connected by a plurality of vibration-damping portions 25 formed between the openings 22 and 23 arranged side by side in the vertical direction in the horizontal center of the metal plate 11, and these vibration-damping portions 25 arranged side by side in the vertical direction are the portions of the metal plate 11 between the openings 22 and 23. In other words, the openings 22 and 23 are formed between a plurality of vibration-damping portions 25 arranged above and below, and therefore each vibration-damping portion 25 is a narrow portion of the metal plate 11 whose length direction is the horizontal direction and whose width direction is the vertical direction. The vertical dimension of each vibration-damping section 25 made of such narrow width parts is smaller than the vertical dimension of the earthquake-resistant section 24, and the vertical dimension of each vibration-damping section 25 is the same, and the left-right dimension of each vibration-damping section 25 is also the same.

The ends of each vibration-damping section 25 in the length direction are connection sections 26 for connecting the vibration-damping section 25 and the earthquake-resistant section 24. The upper and lower sides 26A, 26B of these connection sections 26 are formed by the left and right end sides of the recessed section 21 described above and the left and right end sides of the openings 22, 23. As shown in FIG. 5, of the two upper and lower recessed sections 21, the left and right end sides of the upper recessed section 21 are curved and spread out upward, and the left and right end sides of the lower recessed section 21 are curved and spread out downward, and the left and right end sides of each opening 22, 23 are semicircular sides. Therefore, the upper and lower sides 26A, 26B of the connection section 26 are curved in a shape that diverges toward the earthquake-resistant section 24 side, and the connection sections 26 connecting the ends of each vibration-damping section 25 in the length direction to the earthquake-resistant section 24 are generally diverging connection sections that diverge toward the earthquake-resistant section 24 side.

As shown in Figs. 4 and 6, the two flange members 12 on the left and right of the components that make up the vibration damper 10 have a plurality of small holes 12A for inserting the wood screws 14 described above formed in the vertical direction, which is the length direction of the flange members 12, and in the width direction of the flange members 12, which is also the thickness direction of the metal plate 11. The vertical dimension of the length direction of these flange members 12 is larger than the vertical dimension of the metal plate 11, and at both the top and bottom ends of these flange members 12, recesses 12B are formed that are recessed inward in the vertical direction, which is the length direction of the flange members 12, and these recesses 12B are formed as V-shaped recesses at the center position in the width direction of the flange members 12 that coincides with the fixing position of the metal plate 11 fixed to the flange members 12 by welding as described above.

The two left and right flange members 12 and the aforementioned reinforcing member 13 are made of the same metal material as the metal plate 11.

Figure 8 shows the work carried out on the two left and right columns 1 and 2 before the work of connecting the two left and right flange members 12, which are the components constituting the vibration damper 10, to the two left and right columns 1 and 2, which are the components forming the square frame 5, with wood screws 14, or before the square frame 5 is formed from the two left and right columns 1 and 2, the base 3, and the beams 4. This work is the work of marking the position where the metal plate 11 should be placed on the side surfaces of the two left and right columns 1 and 2 facing each other in the left-right direction by marking or marking work, etc., and this vertical line 15 is displayed at the center position of the penetration direction of the square frame 5 on the side surfaces of the columns 1 and 2 facing each other in the left-right direction.

To connect the two flange members 12 of the vibration damping device 10 to the two columns 1 and 2 with the wood screws 14, the worker first places the two flange members 12 on the vibration damping device 10 on the sides of the two columns 1 and 2 that face each other in the left-right direction, as shown in FIG. 8, by aligning the positions of the V-shaped recesses 12B on the upper and lower ends of each flange member 12 with the positions of the lines 15 displayed on the columns 1 and 2. After this, the worker inserts the shafts 16A of temporary fastening devices 16 such as wood screws into each V-shaped recess 12B as shown in FIG. 9, and inserts the shafts 16A into the interiors of the columns 1 and 2, thereby temporarily fastening each flange member 12 to the columns 1 and 2 with the two temporary fastening devices 16 attached to the columns 1 and 2.

Next, the worker inserts the shafts of the wood screws 14 into the small holes 12A provided in the two flange members 12, and connects the flange members 12 to the two columns 1, 2 with the wood screws 14. As a result, the vibration damping device 10, which is made up of the two flange members 12, is connected to the two columns 1, 2 with the wood screws 14 and placed inside the square frame 5. After this, the worker removes the temporary fasteners 16 from the columns 1, 2, and attaches the surface material made of gypsum board or the like to the surface of the square frame 5.

When the vibration control device 10 is placed inside the square frame 5 in the manner described above, as shown in FIG. 1, the earthquake-resistant section 24 provided on the metal plate 11 is placed in two locations: in the center between the two left and right columns 1 and 2, and between each of these columns 1 and 2, and the vibration control section 25 provided on the metal plate 11 is placed in the center between the two left and right columns 1 and 2.

Figure 10 shows the state when vibration energy due to a lateral load W caused by an earthquake or the like acts on a square frame 5 with a vibration damper 10 placed inside. At this time, the two left and right columns 1 and 2, as shown by the two-dot chain line, bend in the left-right direction, which is the direction of action of the lateral load W, around the lower end connected to the base 3. However, the thickness direction of the two left and right earthquake-resistant parts 24 of the metal plate 11 that is the main body member of the vibration damper 10 is perpendicular to the left-right direction and the overall shape is expanded outward in the left-right direction, so the two left and right earthquake-resistant parts 24 effectively resist this bending deformation, and therefore the two left and right columns 1 and 2 do not bend significantly, and therefore the deformation of the square frame 5 is kept small.

Also, as shown in FIG. 10, when a lateral load W acts on the square frame 5, the beam 4 becomes inclined, as shown by the two-dot chain line, so that the column 1 side of the columns 1 and 2 becomes lower and the column 2 side becomes higher. As a result, the center line N in the left-right direction of the entire vibration damper 10 shown in FIG. 5 becomes inclined with respect to the vertical direction as shown in FIG. 11, and a shear load acts on the vibration damping section 25 provided on the metal plate 11, which deforms the vibration damping section 25 up and down as shown by the two-dot chain line in FIG. 11. Plastic deformation due to this shear load occurs in the vibration damping section 25, and the vibration energy described above is absorbed by the vibration damping section 25. As a result, the vibration of the square frame 5 caused by the vibration energy is damped and attenuated.

The main component of the vibration damper 10 according to the present embodiment is a single metal plate 11 that is the main body of the vibration damper 10. As can be seen from the above explanation, different parts of the metal plate 11 form two earthquake-resistant sections 24 on the left and right for resisting bending deformation of the two columns 1 and 2 on the left and right, and a vibration damping section 25 for absorbing vibration energy by plastic deformation and damping and attenuating the vibration of the square frame 5. Therefore, it is not necessary to configure these earthquake-resistant sections 24 and vibration damping section 25 by combining different components, and therefore the vibration damper 10 according to the present embodiment, which has both earthquake resistance and vibration damping functions, can be configured with a simplified shape and structure. This also reduces the manufacturing cost of the vibration damper 10, and further makes it easier to arrange the vibration damper 10 inside the square frame 5.

In addition, since multiple vibration damping sections 25 are provided on the top and bottom of the metal plate 11, large vibration energy can be sufficiently absorbed.

In addition, the two earthquake-resistant sections 24 on the left and right and the multiple vibration-damping sections 25 on the top and bottom are formed from different parts of the same metal plate 11, so the vibration energy acting on the square frame 5 can be transmitted directly from the earthquake-resistant sections 24 to the vibration-damping sections 25. This means that the vibration energy acting on the earthquake-resistant sections 24 acts on the vibration-damping sections 25 instantly without any time lag, improving the vibration-damping function of the vibration-damping sections 25.

As mentioned above, the connection 26 between the vibration-damping section 25 and the earthquake-resistant section 24 in the longitudinal direction is a flared connection that flares out toward the earthquake-resistant section 24 as a whole. Therefore, when vibration energy is transmitted from the earthquake-resistant section 24 to the vibration-damping section 25, no stress concentration occurs between the earthquake-resistant section 24 and the vibration-damping section 25. This makes it possible to more reliably cause plastic deformation due to vibration energy in the vibration-damping section 25, thereby improving the vibration-damping function of the vibration-damping section 25 that absorbs vibration energy.

Furthermore, the metal plate 11 and the two flange members 12 on the left and right are joined by reinforcing members 13 fixed to the metal plate 11 and the flange members 12 by welding, and the strength of the metal plate 11 in the thickness direction is reinforced by the reinforcing members 13. Therefore, when vibration energy due to the lateral load W in FIG. 10 acts on the metal plate 11, the metal plate 11 can be prevented from deforming in the thickness direction of the metal plate 11. As a result, the two earthquake-resistant sections 24 on the left and right provided on the metal plate 11 can more reliably resist bending deformation of the two columns 1 and 2 on the left and right.

As shown in Fig. 1, two vibration dampers 10 are arranged at an interval inside the square frame 5, one above the other, and the metal plate 11 that is the main body of these vibration dampers 10 is provided with an earthquake-resistant section 24 and a vibration-damping section 25, so that the earthquake-resistant section 24 and the vibration-damping section 25 provided on each metal plate 11 provide great earthquake resistance and vibration-damping functions. Furthermore, when the lateral load W in Fig. 10 acts on the square frame 5, the upper and lower ends of the columns 1 and 2 that form the square frame 5, which are connected to the base 3 and the beam 4 by connecting metal fittings (not shown), and the center of the columns 1 and 2 in the length direction are not greatly bent and deformed, and the two upper and lower vibration dampers 10 are arranged at two upper and lower points on the columns 1 and 2 that are greatly bent and deformed, so that the bending deformation at these two upper and lower points can be effectively suppressed.

In addition, the metal plate 11 has a plurality of openings 22, 23 formed vertically to form a plurality of vibration damping sections 25, and of these openings 22, 23, one opening 23 has a larger opening area than the remaining openings 22. Therefore, when a wall panel is attached to the surface of the square frame 5 in which the vibration damper 10 is arranged, and an electrical appliance such as an electric switch is arranged in a location on this panel corresponding to the location where the vibration damper 10 is arranged, the electrical wiring extending from the electrical appliance can be easily wired inside the square frame by passing it through the opening 23 with the larger opening area.

Furthermore, in this embodiment, as shown in FIG. 9, the upper and lower ends of the two flange members 12 constituting the vibration damping device 10 are provided with recesses 12B for inserting the shafts 16A of the temporary fastening fixtures 16 in order to temporarily fasten the flange members 12 to the two columns 1 and 2. Therefore, until the work of inserting wood screws 14 into the small holes 12A formed in the flange members 12 and connecting the two flange members 12 to the two columns 1 and 2 with the wood screws 14 is performed, the flange members 12 can be temporarily fastened to the two columns 1 and 2 with the temporary fastening fixtures 16. Therefore, this temporary fastening allows the work of connecting the two flange members 12 to the two columns 1 and 2 with the wood screws 14 to be easily and quickly performed by one worker.

In addition, the recesses 12B provided at both the top and bottom ends of the two left and right flange members 12 are V-shaped recesses, so that the temporary fastening device 16 can temporarily fasten the two left and right flange members 12 to the two left and right columns without moving in both the vertical direction and the penetrating direction of the square frame 5 by contacting the shaft portion 16A with the inclined left and right sides of the V-shaped recess 12B and inserting the shaft portion 16A into the recess 12B, regardless of the diameter of the shaft portion 16A.

In addition, the V-shaped recesses 12B provided at the upper and lower ends of the two left and right flange members 12 are provided to coincide with the fixing positions in the width direction of the flange members 12 for the metal plate 11, the left and right ends of which are fixed to these flange members 12 by welding, so that the V-shaped recesses 12B also serve as markers indicating the position of the metal plate 11 on the flange members 12. As described above, when connecting the two flange members 12 to the two columns 1 and 2 with the wood screws 14, the V-shaped recess 12B is aligned with the line 15, which is the aforementioned mark displayed on the opposing sides of the columns 1 and 2, and then the work of connecting the two flange members 12 to the two columns 1 and 2 with the wood screws 14 is performed. When the worker places the vibration damper 10 inside the square frame 5 by aligning the V-shaped recess 12B with the line 15, the metal plate 11 is placed at a predetermined position in the penetration direction of the square frame 5 on the columns 1 and 2 indicated by the line 15, which is the center position in the penetration direction of the square frame 5 on the columns 1 and 2 in this embodiment, and is the exact position where the metal plate 11 should be placed, indicated by the line 15.

Therefore, according to this embodiment, by connecting the two flange members 12 on the left and right to the two pillars 1 and 2 on the left and right with wood screws 14, the metal plate 11 can reliably provide the original earthquake resistance and vibration control functions provided by the two earthquake resistance sections 24 on the left and right and the multiple vibration control sections 25 on the top and bottom.

As described above, the V-shaped recesses 12B provided at the upper and lower ends of the two flange members 12 are used to temporarily fasten the two flange members 12 to the two columns 1 and 2 by inserting the shafts 16A of the temporary fasteners 16, so the V-shaped recesses 12B serve both as recesses for temporarily fastening the two flange members 12 to the two columns 1 and 2 by the temporary fasteners 16 and as marks indicating the position of the metal plate 11 on the flange members 12. These V-shaped recesses and marks may be provided separately on the two flange members 12, but in this embodiment they are used for both purposes, which makes it easier to manufacture the two flange members 12.

The square frame 35 shown in FIG. 12 is formed of four members: a pillar 31, a through pillar 32, a base 33, and a beam 34. The vibration damping device 10 can also be applied to such a square frame 35.

In FIG. 13, the vibration damper 10 is arranged inside a square frame 45 formed of four members, a column 41, a column 42, a base 43, and a beam 44, and the vibration damper 10 is also arranged inside a square frame 47 formed of four members, a column 42, a column 46, a base 43, and a beam 44, and formed adjacent to the square frame 45 in the left-right direction. As shown in this embodiment, the vibration damper 10 may be arranged adjacently inside a plurality of square frames 45, 47 formed adjacently in the left-right direction. The vibration damper 10 may also be arranged adjacently inside a plurality of square frames formed adjacently in the vertical direction, such as an upper floor and a lower floor.

In this embodiment, the vibration damping device 10 arranged inside the square frame 45 and the vibration damping device 10 arranged inside the square frame 47 are arranged with a height position offset, so that the wood screws 14 for connecting the vibration damping device 10 arranged inside the square frame 45 to the pillar 42 and the wood screws 14 for connecting the vibration damping device 10 arranged inside the square frame 47 to the pillar 42 do not interfere with each other inside the pillar 42.

Figure 14 shows a metal plate 51 constituting a vibration damping device of another embodiment. Like the metal plate 11 of the above embodiment, this metal plate 51 also has two large-area earthquake-resistant sections 24 on the left and right, and multiple upper and lower vibration damping sections 25 made of narrow sections connecting these earthquake-resistant sections 24. These two earthquake-resistant sections 24 on the left and right and multiple upper and lower vibration damping sections 25 are formed in the main body 51A of the metal plate 51.

In this embodiment, both left and right ends 51B, 51 of the metal plate 51 are bent at right angles to the main body 51A of the metal plate 51 in the thickness direction of the metal plate 51, which is the penetration direction of the square frame 5. A plurality of reinforcing members 13 are welded to the main body 51A and the right end 51B, and a plurality of reinforcing members 13 are welded to the main body 51A and the left end 51C. These metal plates 51 and reinforcing members 13 form the vibration damping device 50 of this embodiment shown in Figure 15. The two left and right ends 51B, 51C of the metal plate 51, which are provided on the left and right outer sides of the main body 51A, have multiple small holes 51D (see FIG. 14) formed on the top and bottom for inserting wood screws 14, which serve as fasteners for connecting the metal plate 51 to the two left and right pillars 1, 2 of the square frame 5. By connecting the metal plate 51 to the two left and right pillars 1, 2 with these wood screws 14, a vibration control device consisting of the vibration control tool 50 and wood screws 14 is placed inside the square frame 5.

In this embodiment, the vibration damping device 50 is connected to the two pillars 1 and 2 by wood screws 14, with the main body 51A of the metal plate 51 aligned with the position of the lines 15 displayed on the two pillars 1 and 2 shown in Figures 8 and 9.

In this embodiment, the two flange members on the left and right can be omitted, so the vibration damping device 50, which has both earthquake resistance and vibration damping functions, can be made even simpler in shape and structure.

In addition, in Figures 14 and 15, the left and right ends 51B, 51 of the metal plate 51 are bent in opposite directions relative to the main body 51A, but these bending directions may be the same.

The vibration damping device 60 of the embodiment in Figure 16 is a first metal plate 61 and a second metal plate 62 arranged side by side in the penetrating direction of the square frame 5, and these metal plates 61, 62, like the metal plate 51 in Figures 14 and 15, have main body portions 61A, 62A in which two left and right earthquake-resistant sections 24 that are large area portions and multiple upper and lower vibration damping sections 25 made of narrow portions connecting these earthquake-resistant sections 24 are provided, and both left and right end portions 61B, 61C of the first metal plate 61 are bent at right angles relative to the main body portion 61A of the first metal plate 61 toward the opposite side to the second metal plate 62 side, and both left and right end portions 62B, 62C of the second metal plate 62 are bent at right angles relative to the main body portion 62A of the second metal plate 62 toward the opposite side to the first metal plate 61 side. A plurality of upper and lower reinforcing members 13 are welded to the main body 61A and both left and right ends 61B, 61C of the first metal plate 61, and a plurality of upper and lower reinforcing members 13 are welded to the main body 62A and both left and right ends 62B, 62C of the second metal plate 62, so that the vibration damper 60 of this embodiment is composed of the first and second metal plates 61, 62 and the reinforcing members 13. By inserting wood screws 14 into a plurality of upper and lower small holes formed in both left and right ends 61B, 61C, 62B, 62C of the first and second metal plates 61, 62, the first and second metal plates 61, 62 are arranged on the square frame 5 in a state where they are overlapped in the penetration direction of the square frame 5 by these wood screws 14, and a vibration damping device composed of the vibration damper 60 and the wood screws 14 is arranged inside the square frame 5.

In this embodiment, the vibration damping device 60 is connected to the two pillars 1 and 2 by wood screws 14, with the overlapping portions of the main body portions 61A and 62A of the first metal plate 61 and the second metal plate 62 aligned with the positions of the lines 15 displayed on the two left and right pillars 1 and 2 shown in Figures 8 and 9.

The vibration damping device 60 of this embodiment allows the strength of the earthquake-resistant portion of the entire vibration damping device 60, which resists bending and deformation of the two left and right columns 1 and 2, to be greater than that of the vibration damping devices 10 and 50 of the above-mentioned embodiments, which have only one metal plate, and also allows the vibration energy absorbed by the vibration damping portion of the entire vibration damping device 60 to be greater.

The vibration damper 70 according to the embodiment of FIG. 17 is a device in which a third metal plate 71 is disposed between the first metal plate 61 and the second metal plate 62 at a distance, and the third metal plate 71 is disposed in the distance, and includes two large-area earthquake-resistant sections 24 on the left and right, and multiple upper and lower vibration damping sections 25 formed by narrow width sections connecting the earthquake-resistant sections 24, as in the main body sections 61A and 62A of the first and second metal plates 61 and 62. The third metal plate 71 does not include any parts corresponding to the left and right ends 61B, 61C, 62B, and 62C of the first and second metal plates 61 and 62, and the three metal plates 61, 62, and 71 are connected to each other by bolts 81 and nuts 82 at the earthquake-resistant sections 24 provided on the metal plates 61, 62, and 71.

In other words, the three metal plates 61, 62, 71 have holes formed in the earthquake-resistant sections 24 into which the shafts 81A of the bolts 81 are inserted, and nuts 82 are screwed onto the ends of the shafts 81A that protrude from the holes. By tightening the nuts 82, the three metal plates 61, 62, 71 are connected to each other by fastening connectors consisting of the bolts 81 and nuts 82 in the earthquake-resistant sections 24 provided on the metal plates 61, 62, 71, and multiple fastening connectors are provided in the vertical direction for each of the two earthquake-resistant sections 24 on the left and right.

The vibration damper 70 is composed of the three metal plates 61, 62, 71 and the reinforcing members 13 provided on the first and second metal plates 61, 62. By inserting wood screws 14 into a number of small holes formed on the upper and lower left and right ends 61B, 61C, 62B, 62C of the first and second metal plates 61, 62, the three metal plates 61, 62, 71 are arranged on the square frame 5 in a state where they are overlapped in the penetrating direction of the square frame 5 by these wood screws 14, and a vibration damping device composed of the vibration damper 70 and the wood screws 14 is arranged inside the square frame 5.

In this embodiment, the vibration damping device 70 is connected to the two left and right pillars 1 and 2 by wood screws 14, with the third metal plate 71 aligned with the position of the lines 15 displayed on these pillars 1 and 2 shown in Figures 8 and 9.

According to the vibration damper 70 of this embodiment, the strength of the earthquake-resistant portion of the entire vibration damper 70 that resists bending deformation of the two left and right columns 1 and 2 due to vibration energy caused by the lateral load W can be made even greater than that of the vibration damper 60 of the embodiment of FIG. 16, and the vibration energy that can be absorbed by the vibration damping portion of the entire vibration damper 70 can also be made even greater than that of the vibration damper 60 of the embodiment of FIG. 16. In addition, since the earthquake-resistant portions 24 of the three metal plates 61, 62, and 71 are connected by connectors made of bolts 81 and nuts 82, it is possible to prevent the occurrence of displacement between the earthquake-resistant portions 24 when vibration energy acts on the square frame 5, and thus the strength of the earthquake-resistant portion of the entire vibration damper 70 that resists bending deformation of the two left and right columns 1 and 2 can be made even greater. In addition, since the vibration damping portions 25 of the three metal plates 61, 62, and 71 are not connected, the original vibration damping function of these vibration damping portions 25 can be fully exerted.

The vibration damping sections 25 of the three metal plates 61, 62, and 71 may be connected by means of connectors such as bolts 81 and nuts 82.

In the vibration damper 60 of FIG. 16, which has two metal plates, a first metal plate 61 and a second metal plate 62, the first metal plate 61 and the second metal plate 62 may be connected to each other by a connector made of a bolt 81 and a nut 82 at the earthquake-resistant portion 24 provided on the metal plates 61 and 62, as shown in FIG. 16, or may not be connected. In the vibration damper 60 of FIG. 16, the first metal plate 61 and the second metal plate 62 may be connected to each other by a connector made of a bolt 81 and a nut 82 at the vibration-damping portion 25 provided on the metal plates 61 and 62, or may not be connected.

The present invention can be used for buildings and other structures that have a square frame formed by four members, including two columns on the left and right.

DESCRIPTION OF SYMBOLS 1, 2, 31, 32, 41, 42, 47 Pillar serving as a member forming the square frame 3, 33, 43 Base serving as a member forming the square frame 4, 34, 44 Beam serving as a member forming the square frame 5, 35, 45, 47 Square frame 10, 50, 60, 70 Vibration damping device 11 Metal plate 12 Flange member 12B V-shaped recess serving as a recess and also as a marker 13 Reinforcement member 14 Wood screw serving as a fastener 15 Line serving as a mark 16 Temporary fastener 16A Shaft 22, 23 Opening 24 Earthquake-resistant portion 25 Vibration damping portion 26 Connection portion 26A, 26B Upper and lower sides of connection portion 51 Metal plate 51A Main body portion 51B, 51C Two left and right ends 61 First metal plate 61A Main body portion 61B, 61C Two left and right ends 62 Second metal plate 62A Main body 62B, 62C Two left and right end portions 71 Third metal plate 81 Bolt,
82 Nut

Claims (16)

A vibration control device including a vibration control device disposed inside a square frame formed by four members including two left and right columns that constitute a structure, and a fastener for fastening the vibration control device to the square frame,
In the vibration control device, the vibration control tool has two left and right earthquake-resistant sections provided at the center between the two left and right columns and two positions between each of the two left and right columns for resisting bending deformation of the two left and right columns due to vibration energy acting on the square frame, and a vibration control section provided at the center between the two left and right columns for absorbing the vibration energy and controlling vibration,
The vibration damping device is configured to include at least one metal plate disposed between the two left and right columns, and the two left and right earthquake-resistant sections and the vibration damping section are formed by different parts of the metal plate whose thickness direction is in the penetration direction of the rectangular frame ,
The vibration control device is characterized in that the number of the metal plate is one, two flange members are fixed to the left and right ends of the metal plate, and these flange members are connected to the two left and right pillars by the fasteners, so that the one metal plate is positioned between the two left and right pillars . 2. The vibration damping device according to claim 1, characterized in that a reinforcing member is fixed to the metal plate and the flange member for reinforcing the strength of the metal plate in the thickness direction, which is the penetrating direction of the square frame. 3. A vibration damping device as described in claim 1 or 2 , characterized in that at both upper and lower ends of the two left and right flange members, recesses are provided into which shanks of temporary fastening devices are inserted so that the two left and right flange members can be temporarily fastened to the two left and right pillars by the temporary fastening devices before the flange members are joined to the two left and right pillars by the fasteners. 4. The vibration damping device according to claim 3 , wherein the recess is a V-shaped recess. A vibration-damping device as described in any one of claims 1 to 4, characterized in that, on the opposing side surfaces of the two left and right pillars, marks are displayed indicating the position in the penetrating direction of the square frame on the pillars where the single metal plate should be placed, and the two left and right flange members are provided with marks indicating the position of the single metal plate whose left and right ends are fixed to these flange members, and by joining the two left and right flange members to the two left and right pillars with the fasteners in line with the marks, the single metal plate is positioned at the position in the penetrating direction of the square frame on the pillars where the single metal plate should be placed. A vibration control device including a vibration control device disposed inside a square frame formed by four members including two left and right columns that constitute a structure, and a fastener for fastening the vibration control device to the square frame,
In the vibration control device, the vibration control device has two earthquake-resistant sections, one at the center between the two left and right columns and the other at two locations between the two left and right columns, for resisting bending deformation of the two left and right columns due to vibration energy acting on the square frame, and a vibration control section, which is provided at the center between the two left and right columns and absorbs the vibration energy to control vibration,
The vibration damping device is configured to include at least one metal plate disposed between the two left and right columns, and the two left and right earthquake-resistant sections and the vibration damping section are formed by different parts of the metal plate whose thickness direction is in the penetration direction of the rectangular frame,
the first metal plate has a main body portion in which the two left and right earthquake-resistant portions and the vibration-damping portion are provided, and two left and right end portions provided on the left and right outer sides of the main body portion by bending the main body portion in the direction opposite to the second metal plate side in the penetration direction of the rectangular frame, and these end portions are fastened to the two left and right pillars by the fasteners, thereby disposing the first metal plate between the two left and right pillars; the second metal plate has a main body portion in which the two left and right earthquake-resistant portions and the vibration-damping portion are provided, and two left and right end portions provided on the left and right outer sides of the main body portion by bending the main body portion of the second metal plate in the direction opposite to the first metal plate side in the penetration direction of the rectangular frame, and these end portions are fastened to the two left and right pillars by the fasteners, thereby disposing the second metal plate between the two left and right pillars. 7. The vibration damping device according to claim 6, wherein reinforcing members are fixed to the main body portion of the first metal plate and to the two left and right ends of the first metal plate for reinforcing the strength of the metal plate in the thickness direction, which is the penetrating direction of the square frame, and reinforcing members are fixed to the main body portion of the second metal plate and to the two left and right ends of the second metal plate for reinforcing the strength of the metal plate in the thickness direction, which is the penetrating direction of the square frame. A vibration damping device as described in claim 6 or 7 , characterized in that a third metal plate is arranged between the first metal plate and the second metal plate, and this third metal plate also has the two left and right earthquake-resistant portions and the vibration damping portion. 9. The vibration damping device according to claim 6, wherein the metal plates are connected to each other at the two left and right earthquake-resistant sections provided on the metal plates. 10. The vibration damping device according to claim 6, wherein the metal plates are connected to each other at the vibration damping portion provided on the metal plates. In a vibration control device as described in any one of claims 1 to 10 , each of the two left and right earthquake-resistant sections is a large-area section of the metal plate having a vertical dimension and a horizontal dimension, and these large-area sections are connected by the vibration control section, and this vibration control section is a narrow-width section of the metal plate whose vertical dimension is smaller than the vertical dimension of the large-area section and has a horizontal length, and the vibration control section absorbs the vibration energy by plastically deforming this narrow-width section due to the vibration energy. The vibration damping device according to claim 11 , characterized in that the connection portion between the vibration damping portion and the earthquake-resistant portion in the longitudinal direction thereof is a flared connection portion in which both upper and lower sides of the connection portion are curved in a flared shape toward the earthquake-resistant portion. 13. The vibration damping device according to claim 11, wherein the vibration damping portion is provided in a plurality of parts spaced apart from each other in the vertical direction. 14. The vibration damping device according to claim 13, wherein an opening is formed in the metal plate between two adjacent vibration damping sections, and there are a plurality of such openings on the upper and lower sides. 15. The vibration damping device according to claim 14, wherein at least one of the plurality of openings provided above and below has an opening area larger than the remaining openings. In the vibration damping device described in any one of claims 1 to 15, the metal plates formed in different areas where the two left and right earthquake-resistant sections and the vibration damping section are different are arranged in multiple numbers in the vertical direction inside the square frame.

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