Damper stroke limiting structure

Abstract

To provide a damper stroke limiting structure capable of preventing a damper from being damaged while preventing enlargement of the damper.SOLUTION: A damper stroke limiting structure includes: a damper 30 connecting a first base plate 14 and a second base plate 24; a compression amount limiting member 50 provided on the first base plate 14 and limiting compression of the damper 30 by contacting the second base plate 24 when a compression amount of the damper 30 is equal to or more than a specific amount; and an extension amount limiting member 80 arranged at an opposite side to the first base plate 14 with respect to the second base plate 24 and connected to the first base plate 14 through a tension member, and limiting extension of the damper 30 by contacting the second base plate 24 when an extension amount of the damper 30 is equal to or more than the specific amount.SELECTED DRAWING: Figure 1

Description

Technical Field

[0005]

[0001] The present invention relates to a damper stroke limit structure.

Background Art

[0002] There is known a tension member that is arranged around a vibration damping damper and functions as an elastoplastic damper in a state where a tensile force acts (see, for example, Patent Document 1).

[0003] Also, there is known a support member that supports a mass damper and includes two steel bars as tension members and concrete and steel pipes as compression members (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, there is a limit value (limit stroke value) for the expansion and contraction amount (stroke amount) of a damper such as an oil damper, and if this limit value is exceeded, the damper may be damaged.

[0006] As a countermeasure, for example, it is conceivable to increase the limit stroke value of the damper, but in this case, the damper may be enlarged.

[0007] In consideration of the above facts, an object of the present invention is to suppress damage to the damper while suppressing enlargement of the damper.

Means for Solving the Problems

[0008] The damper stroke limiting structure according to claim 1 comprises: a damper connecting a first connecting member and a second connecting member; a compression limiting member provided on the first connecting member, which contacts the second connecting member and limits the compression of the damper when the compression amount of the damper is greater than or equal to a predetermined value; and an extension limiting member positioned on the opposite side of the second connecting member from the first connecting member and connected to the first connecting member via a tension member, which contacts the second connecting member and limits the extension of the damper when the extension amount of the damper is greater than or equal to a predetermined value.

[0009] According to the damper stroke limiting structure of claim 1, the damper connects a first connecting member and a second connecting member. The first connecting member is provided with a compression limiting member. The compression limiting member contacts the second connecting member when the compression amount of the damper exceeds a predetermined value, thereby limiting the compression of the damper.

[0010] Furthermore, an elongation limiting member is connected to the first connecting member via a tension member. The elongation limiting member is positioned on the opposite side of the second connecting member from the first connecting member. This elongation limiting member contacts the second connecting member when the damper's elongation exceeds a predetermined value, thereby limiting the damper's elongation.

[0011] By limiting the amount of expansion and contraction of the damper using the compression limiting member and the extension limiting member, it is possible to suppress damper damage without increasing the damper's limit stroke value.

[0012] Therefore, it is possible to suppress damper damage while keeping the damper size down.

[0013] The damper stroke limiting structure according to claim 2 is the damper stroke limiting structure according to claim 1, wherein the tension member penetrates the second connecting member and connects the compression limiting member and the first connecting member.

[0014] According to the damper stroke limiting structure of claim 2, the tension member penetrates the second connecting member and connects the elongation limiting member and the first connecting member. As a result, when the elongation amount of the damper exceeds a predetermined value, and the elongation limiting member comes into contact with the second connecting member, a tensile force is transmitted from the elongation limiting member to the first connecting member via the tension member.

[0015] By passing the tension member through the second connecting member in this way, the damper stroke limiting structure can be miniaturized.

[0016] The damper stroke limiting structure according to claim 3 is the damper stroke limiting structure according to claim 2, wherein the compression limiting member faces the second connecting member and has a compression-side bearing plate that makes surface contact with the second connecting member when the compression amount of the damper is greater than or equal to a predetermined value, the compression limiting member faces the compression-side bearing plate with the second connecting member in between and has an extension-side bearing plate that makes surface contact with the second connecting member when the extension amount of the damper is greater than or equal to a predetermined value, and the tension member penetrates the compression-side bearing plate and the extension-side bearing plate.

[0017] According to the damper stroke limiting structure of claim 3, the compression limiting member has a compression-side bearing plate. The compression-side bearing plate faces the second connecting member and makes surface contact with the second connecting member when the amount of compression of the damper is greater than or equal to a predetermined value. This improves stress transmission between the compression limiting member and the second connecting member.

[0018] Furthermore, the compression limiting member has an extension-side bearing plate. The extension-side bearing plate faces the compression-side bearing plate with the second connecting member in between, and makes surface contact with the second connecting member when the damper's extension exceeds a predetermined value. This ensures good stress transfer between the extension limiting member and the second connecting member.

[0019] Furthermore, the tension member penetrates the compression-side bearing plate and the extension-side bearing plate, connecting the compression limiting member and the extension limiting member. By passing the tension member through the compression-side bearing plate and the extension-side bearing plate in this way, the damper stroke limiting structure can be further miniaturized.

[0020] The damper stroke limiting structure according to claim 4 is the damper stroke limiting structure according to any one of claims 1 to 3, wherein the first connecting member is a first base plate to which one end of the damper is connected and which extends from the one end to one side, the second connecting member is a second base plate to which the other end of the damper is connected and which extends from the other end to one side, and the compression amount limiting member is disposed on one side of the damper and connects the first base plate and the second base plate.

[0021] According to the damper stroke limiting structure according to claim 4, the first connecting member is a first base plate to which one end of the damper is connected and which extends from the one end to one side. Also, the second connecting member is a second base plate to which the other end of the damper is connected and which extends from the other end to one side. And the compression amount limiting member is disposed on one side of the damper and connects the first base plate and the second base plate.

[0022] By using the first base plate and the second base plate of the damper as the base plates of the damper stroke limiting structure in this way, it is possible to further reduce the size of the damper stroke limiting structure and reduce the number of parts.

Effect of the Invention

[0023] As described above, according to the present invention, it is possible to suppress the enlargement of the damper and suppress the breakage of the damper.

Brief Description of the Drawings

[0024] [Figure 1] It is a plan view showing a damper and a stroke limiting mechanism to which a damper stroke limiting structure according to an embodiment is applied. [Figure 2] It is a sectional view taken along line 2-2 of FIG. 1. [Figure 3]This is a plan view corresponding to Figure 1, which shows the state in which the compression side bearing plate and the second base plate are in surface contact. [Figure 4] This is a plan view corresponding to Figure 1, which shows the state in which the extension side bearing plate and the second base plate are in surface contact. [Modes for carrying out the invention]

[0025] The damper stroke limiting structure according to one embodiment will be described below with reference to the drawings.

[0026] (structure) Figure 1 shows a damper 30 and a stroke limiting mechanism 40 to which the damper stroke limiting structure according to this embodiment is applied. The damper 30 and stroke limiting mechanism 40 are, for example, placed between a pair of adjacent structures (buildings) 10, 20, and connect these structures 10, 20.

[0027] Adjacent structures 10 and 20 are, for example, seismically isolated structures. These structures 10 and 20 each have outer perimeter beams 12 and 22. The outer perimeter beams 12 and 22 are arranged along the outer perimeters of the adjacent structures 10 and 20, respectively. Furthermore, the outer perimeter beams 12 and 22 are formed, for example, from H-shaped steel with the web oriented horizontally, and are arranged with their respective flanges 12A and 22A facing each other.

[0028] Furthermore, structures 10 and 20 are not limited to base isolation structures, but may also be earthquake-resistant structures, for example. Also, outer perimeter beams 12 and 22 are examples of first and second support members. In addition, the first and second support members are not limited to outer perimeter beams 12 and 22, but may also be columns, slabs, etc.

[0029] A first base plate 14 is provided on the flange 12A of one of the outer perimeter beams 12. The first base plate 14 is made of a steel plate or the like that is thicker than the flange 12A of the outer perimeter beam 12 and is positioned along the material axis of the outer perimeter beam 12. This first base plate 14 is joined to the outer surface of the flange 12A of the outer perimeter beam 12 by welding or the like, with the plate overlapping it.

[0030] A second base plate 24 is provided on the flange 22A of the other outer perimeter beam 22. The second base plate 24 is made of a steel plate or the like that is thicker than the flange 22A of the outer perimeter beam 22, and is positioned along the material axis of the outer perimeter beam 22 and opposite the first base plate 14. This second base plate 24 is joined to the outer surface of the flange 22A of the outer perimeter beam 22 by welding or the like, with the second base plate 24 overlapping it.

[0031] In this configuration, during an earthquake, the first base plate 14 and the second base plate 24 move closer together or further apart in their respective opposing directions (arrow X direction) in accordance with the vibrations of the adjacent structures 10 and 20. These first base plate 14 and second base plate 24 are connected by a damper 30 and a stroke limiting mechanism 40.

[0032] (Dampa) The damper 30 is, for example, an oil damper. The damper 30 is arranged approximately horizontally, with its extension and contraction direction being in the opposing direction (relative movement direction, arrow X direction) of the first base plate 14 and the second base plate 24.

[0033] The damper 30 contracts when the first base plate 14 and the second base plate 24 approach each other, and extends when the first base plate 14 and the second base plate 24 move apart. This expansion and contraction causes the damper 30 to exert vibration damping force.

[0034] Note that the damper 30 is not limited to an oil damper. The damper 30 can be any vibration damping device that generates damping force as it expands and contracts, such as an air damper or a rotational inertia mass damper.

[0035] The damper 30 has a cylinder 32 and a piston rod 34 arranged along the opposing directions (arrow X direction) of the first base plate 14 and the second base plate 24. The cylinder 32 is located on the first base plate 14 side, and the piston rod 34 is located on the second base plate 24 side. The arrangement of the cylinder 32 and the piston rod 34 can be changed as appropriate.

[0036] A first mounting base 36 is provided at one end of the piston rod 34 (one end of the damper 30). The first mounting base 36 is superimposed on the first base plate 14 and connected by bolts or the like (not shown).

[0037] The other end of the piston rod 34 is removably inserted into one end of the cylinder 32. The cylinder 32 contains a working fluid such as oil. A piston (not shown) is attached to the other end of the piston rod 34.

[0038] A second mounting base 38 is provided at the other end of the cylinder 32 (the other end of the damper 30). The second mounting base 38 is superimposed on the second base plate 24 and joined by bolts or the like (not shown).

[0039] Furthermore, one end of the piston rod 34 and the first mounting base 36 may be rotatably connected via a universal joint such as a ball joint, or they may be connected in a non-rotatable manner. Similarly, the other end of the cylinder 32 and the second mounting base 38 may be rotatably connected via a universal joint such as a ball joint, or they may be connected in a non-rotatable manner.

[0040] (Stroke limiting mechanism) The stroke limiting mechanism (stroke limiter mechanism) 40 is a mechanism that limits the amount of extension and contraction (stroke amount) of the damper 30 to a predetermined range, thereby suppressing damage to the damper 30. This stroke limiting mechanism 40 is attached to one side of the damper 30 and is mounted on the first base plate 14 and the second base plate 24. In other words, in this embodiment, the damper 30 and the stroke limiting mechanism 40 share the first base plate 14 and the second base plate 24.

[0041] The stroke limiting mechanism 40 includes a compression limiting member 50, a compression adjustment mechanism 60, a tension member 70, an extension limiting member 80, and an extension adjustment mechanism 90.

[0042] (Compression limiting member) The compression limiting member 50 is formed from a steel frame member and is positioned on one side of the damper 30 along the direction of expansion and contraction of the damper 30 (arrow X direction). One end of the compression limiting member 50 is joined to the first base plate 14 by welding or the like, while abutting against it. This compression limiting member 50 extends from the first base plate 14 toward the second base plate 24.

[0043] A compression-side bearing plate 54 is provided at the other end (the tip in the extending direction) of the compression limiting member 50. The compression-side bearing plate 54 is made of steel plate or the like and is positioned opposite the second base plate 24. The other end of the compression limiting member 50 is joined to this compression-side bearing plate 54 by welding or the like, with the end of the compression limiting member 50 abutting against it.

[0044] The compression-side bearing plate 54 is positioned with a predetermined gap S1 between it and the second base plate 24. The bearing surface of this compression-side bearing plate 54 contacts (surface contact with) the outer surface of the second base plate 24 (the surface on the first base plate 14 side) when the amount of compression of the damper 30 exceeds a predetermined value (gap S1). This limits the amount of compression of the damper 30 to within a predetermined value.

[0045] The interval S1 is set appropriately based, for example, on the maximum compression amount (limit compression amount) set for the damper 30.

[0046] (Compression amount adjustment mechanism) The compression limiting member 50 is provided with a compression adjustment mechanism 60 that increases or decreases the distance S1 between the compression side bearing plate 54 and the second base plate 24. Specifically, the compression limiting member 50 has a pair of divided pieces 52 that are divided in the direction of expansion and contraction of the damper 30 (arrow X direction).

[0047] The pair of segmented pieces 52 are formed from H-shaped steel. Each segmented piece 52 has a pair of flanges 52A that face each other horizontally and a web 52B connecting the pair of flanges 52A, and is positioned with the web 52B in a horizontal position.

[0048] The compression amount adjustment mechanism 60 is configured as a connecting mechanism that allows the spacing G between a pair of divided pieces 52 in the material axis direction (arrow X direction) to be increased or decreased. This compression amount adjustment mechanism 60 includes a flange splice plate 62 that bolts together the flanges 52A of the pair of divided pieces 52, and a web splice plate 64 that bolts together the webs 52B of the pair of divided pieces 52.

[0049] Here, when adjusting the distance S1 between the second base plate 24 and the compression side bearing plate 54, the distance G between the pair of divided pieces 52 is increased or decreased depending on the position of the bolt connections of the web splice plate 64 and the flange splice plate 62.

[0050] Furthermore, by making the bolt holes for bolting the web splice plate 64 and the flange splice plate 62 elongated holes that extend in the direction of expansion and contraction of the damper 30 (arrow X direction), it is also possible to increase the adjustment range of the gap S1 between the compression side bearing plate 54 and the second base plate 24.

[0051] Furthermore, for example, by providing a filler plate as a compression amount adjustment mechanism on at least one of the second base plate 24 and the compression side bearing plate 54, it is also possible to increase or decrease the distance S1 between the second base plate 24 and the compression side bearing plate 54.

[0052] Furthermore, the compression amount adjustment mechanism 60 may be provided on the compression amount limiting member 50 as needed, and can be omitted as appropriate.

[0053] (Tension member) As shown in Figures 1 and 2, the elongation limiting member 80 is connected to the first base plate 14 via a pair of tension members 70. The pair of tension members 70 are formed from rod-shaped steel materials such as PC steel bars or reinforcing bars, and are arranged along the material axis direction (arrow X direction) of the compression limiting member 50.

[0054] A pair of tension members 70 are positioned on both sides of the web 52B of the compression limiting member 50. Threaded portions (male threads) 70N are formed at both ends of each tension member 70. The arrangement and number of tension members 70 can be changed as appropriate.

[0055] One end of a pair of tension members 70 is connected to the first base plate 14. Specifically, one end of the tension member 70 passes through the flange 12A of the outer perimeter beam 12 and the through holes 12H and 14H formed in the first base plate 14, respectively.

[0056] A pair of nuts 72A and 72B, which are positioned on both sides of the first base plate 14, are attached to one end of the tension member 70. By sandwiching the first base plate 14 from both sides with this pair of nuts 72A and 72B, one end of the tension member 70 is fixed to the first base plate 14.

[0057] Furthermore, one end of the pair of tension members 70 does not necessarily have to be fixed to the first base plate 14. It is sufficient that one end of the pair of tension members 70 is connected to the first base plate 14 in a way that allows tensile force to be transmitted, and for example, the nut 72B may be omitted.

[0058] Furthermore, one end of the pair of tension members 70 does not need to be directly connected to the first base plate 14. For example, one end of the pair of tension members 70 can be connected to the first base plate 14 via the compression limiting member 50 by connecting one end of the pair of tension members 70 to a stiffener or the like provided on the compression limiting member 50.

[0059] The other ends of the pair of tension members 70 pass through through holes 22H, 24H, and 54H formed in the flange 22A of the outer perimeter beam 22, the second base plate 24, and the compression side bearing plate 54, respectively. Nuts 92 and extension limiting members 80 are attached to the other ends of the tension members 70.

[0060] The extension limiting member 80 is positioned on the side opposite to the first base plate 14 relative to the second base plate 24. This extension limiting member 80 has an extension-side bearing plate 80A. The extension-side bearing plate 80A is made of steel plate or the like and faces the compression-side bearing plate 54 with the second base plate 24 in between.

[0061] A through-hole (not shown) is formed in the center of the extension-side bearing plate 80A, through which the other end of the tension member 70 passes. This extension limiting member 80 is fixed to a nut 92 attached to the other end of the tension member 70 by welding or the like. As a result, when the nut 92 is moved along the tension member 70, the nut 92 and the extension limiting member 80 move together.

[0062] Here, the extension-side bearing plate 80A is positioned with a predetermined gap S2 between it and the flange 22A of the outer peripheral beam 22 to which the second base plate 24 is attached. The bearing surface of this extension-side bearing plate 80A contacts (surface contact) the inner surface of the second base plate 24 (the surface opposite to the first base plate 14) via the flange 22A of the outer peripheral beam 22 when the extension amount of the damper 30 exceeds a predetermined value (gap S2). This limits the extension amount of the damper 30 to within a predetermined value.

[0063] The interval S2 is set appropriately based, for example, on the maximum extension amount (limit extension amount) set for the damper 30.

[0064] (Extension amount adjustment mechanism) The extension limiting member 80 is provided with an extension adjustment mechanism 90 that increases or decreases the distance S2 between the extension-side bearing plate 80A and the flange 22A of the outer perimeter beam 22. Specifically, the extension adjustment mechanism 90 is composed of a threaded portion (male threaded portion) 70N formed on the other end of the tension member 70, and a nut 92 attached to the threaded portion 70N.

[0065] Here, when adjusting the gap S2 between the extension-side bearing plate 80A and the flange 22A of the outer perimeter beam 22, the nut 92 and the extension-side bearing plate 80A joined to the nut 92 are moved along the threaded portion 70N of the tension member 70.

[0066] In this embodiment, when the extension of the damper 30 exceeds a predetermined value, the extension-side bearing plate 80A contacts the second base plate 24 via the flange 22A of the outer perimeter beam 22. However, the extension-side bearing plate 80A only needs to be able to transmit tensile force to the second base plate 24 when the extension of the damper 30 exceeds a predetermined value, and for example, the extension-side bearing plate 80A may be in direct contact with the second base plate 24. In other words, the extension amount adjustment mechanism 90 only needs to be configured to adjust the distance between the extension-side bearing plate 80A and the second base plate 24, regardless of the presence or absence of the flange 22A of the outer perimeter beam 22.

[0067] Furthermore, the extension amount adjustment mechanism 90 may be provided on the extension amount limiting member 80 as needed, and can be omitted as appropriate.

[0068] (action) Next, the operation of this embodiment will be described.

[0069] As shown in Figure 3, for example, during an earthquake, when adjacent structures 10 and 20 vibrate and the first base plate 14 and the second base plate 24 move closer together, the piston rod 34 is inserted into the cylinder 32 of the damper 30, causing the damper 30 to contract. As a result, the damper 30 exerts a vibration-damping force, reducing the vibration of the adjacent structures 10 and 20.

[0070] Furthermore, when the amount of contraction of the damper 30 exceeds a predetermined value (interval S1 in Figure 1), the second base plate 24 and the compression-side bearing plate 54 come into surface contact. As a result, compressive force is transmitted from the second base plate 24 to the first base plate 14 via the compression limiting member 50, thereby limiting the compression of the damper 30. Consequently, damage to the damper 30 is suppressed.

[0071] On the other hand, as shown in Figure 4, when the first base plate 14 and the second base plate 24 separate, the piston rod 34 protrudes from the cylinder 32 of the damper 30, and the damper 30 extends. As a result, the damper 30 exerts a vibration-damping force, reducing the vibration of the adjacent structures 10 and 20.

[0072] Furthermore, when the extension of the damper 30 exceeds a predetermined value (interval S2 in Figure 1), the second base plate 24 and the extension-side bearing plate 80A of the extension limiting member 80 come into surface contact via the flange 22A of the outer perimeter beam 22. As a result, tensile force is transmitted from the second base plate 24 to the first base plate 14 via the extension limiting member 80 and the pair of tension members 70, thereby limiting the extension of the damper 30. Consequently, damage to the damper 30 is suppressed.

[0073] Thus, in this embodiment, by limiting the amount of expansion and contraction of the damper 30 with the compression limiting member 50 and the extension limiting member 80, it is possible to suppress damage to the damper 30 without increasing the limit stroke value of the damper 30. Therefore, it is possible to suppress damage to the damper 30 while suppressing an increase in the size of the damper 30.

[0074] Furthermore, the compression limiting member 50 has a compression-side bearing plate 54. The compression-side bearing plate 54 faces the second base plate 24 and makes surface contact with the second base plate 24 when the compression amount of the damper 30 exceeds a predetermined value. This ensures good stress transfer between the compression limiting member 50 and the second base plate 24.

[0075] Furthermore, the extension limiting member 80 has an extension-side bearing plate 80A. The extension-side bearing plate 80A faces the compression-side bearing plate 54 with the second base plate 24 in between, and when the extension of the damper 30 exceeds a predetermined value, it makes surface contact with the second base plate 24 via the flange 22A of the outer perimeter beam 22. This improves stress transfer between the extension limiting member 80 and the second base plate 24.

[0076] Furthermore, the pair of tension members 70 penetrate the flange 22A of the outer perimeter beam 22 and the second base plate 24, connecting the extension limiting member 80 and the first base plate 14. As a result, in this embodiment, the stroke limiting mechanism 40 can be made smaller compared to a case where the pair of tension members 70 do not penetrate the flange 22A of the outer perimeter beam 22 and the second base plate 24.

[0077] Furthermore, the pair of tension members 70 also penetrate the compression-side bearing plate 54 and are housed between the flanges 52A on both sides of the compression limiting member 50. This allows for further miniaturization of the stroke limiting mechanism 40.

[0078] Furthermore, the compression limiting member 50 is provided with a compression adjustment mechanism 60 that increases or decreases the distance S1 between the second base plate 24 and the compression-side bearing plate 54. In addition, the extension limiting member 80 is provided with an extension adjustment mechanism 90 that increases or decreases the distance S2 between the flange 22A of the outer perimeter beam 22 and the extension-side bearing plate 80A.

[0079] By providing the stroke limiting mechanism 40 with a compression adjustment mechanism 60 and an extension adjustment mechanism 90, the compression amount (limit compression amount) and extension amount (limit extension amount) of the damper 30 can be easily adjusted. Therefore, the versatility of the stroke limiting mechanism 40 is improved.

[0080] Furthermore, in this embodiment, the damper 30 and the stroke limiting mechanism 40 share the first base plate 14 and the second base plate 24. This improves the adjustment accuracy of the compression amount (limit compression amount) and extension amount (limit extension amount) of the damper 30. In addition, since the number of parts of the stroke limiting mechanism 40 is reduced, the ease of installation and cost can be reduced.

[0081] Furthermore, the stroke limiting mechanism 40 is located on only one side of the damper 30. As a result, in this embodiment, the maintainability of the damper 30 is improved compared to the case where multiple stroke limiting mechanisms 40 are located around the damper 30.

[0082] (modified version) Next, a modified example of the above embodiment will be described.

[0083] In the above embodiment, the tension member 70 penetrates the compression-side bearing plate 54. However, the tension member 70 does not need to penetrate the compression-side bearing plate 54. Similarly, in the above embodiment, the tension member 70 penetrates the second base plate 24. However, the tension member 70 does not need to penetrate the second base plate 24.

[0084] Furthermore, in the above embodiment, the tension member 70 is a rod-shaped steel material. However, the tension member 70 is not limited to a rod-shaped steel material; it may also be a wire material such as PC steel wire, or a steel frame member such as shaped steel or steel pipe.

[0085] Furthermore, in the above embodiment, a compression-side bearing plate 54 is provided at the contact portion of the compression limiting member 50 with the second base plate 24. However, the configuration of the contact portion of the compression limiting member 50 with the second base plate 24 is only required to enable the transmission of compressive force between it and the second base plate 24, and can be changed as appropriate.

[0086] Similarly, in the above embodiment, an extension-side bearing plate 80A is provided at the contact portion of the extension-limiting member 80 with the second base plate 24. However, the configuration of the contact portion of the extension-limiting member 80 with the second base plate 24 only needs to be capable of transmitting tensile force between it and the second base plate 24, and can be changed as appropriate.

[0087] Furthermore, in the above embodiment, the damper 30 and the stroke limiting mechanism 40 share the first base plate 14 and the second base plate 24. However, the damper 30 and the stroke limiting mechanism 40 may use separate base plates.

[0088] Furthermore, in the above embodiment, the first connecting member and the second connecting member are the first base plate 14 and the second base plate 24. However, the first connecting member and the second connecting member are not limited to the first base plate 14 and the second base plate 24, but may also be, for example, columns, beams, slabs, foundations, etc.

[0089] Furthermore, in the above embodiment, the damper 30 and the stroke limiting mechanism 40 are arranged along the horizontal direction. However, the orientation of the damper 30 and the stroke limiting mechanism 40 is not limited to the horizontal direction. The damper 30 and the stroke limiting mechanism 40 can be appropriately changed depending on the arrangement of the first connecting member and the second connecting member, and may be arranged along the vertical direction or diagonal direction, for example.

[0090] Furthermore, in the above embodiment, the stroke limiting mechanism 40 is attached to one side of the damper 30. However, the stroke limiting mechanism 40 may be attached to both sides of the damper 30, or multiple such mechanisms may be attached around the damper 30. Moreover, the stroke limiting mechanism 40 is not limited to being attached around the damper 30, but can also be installed at a location away from the damper 30.

[0091] Although one embodiment of the present invention has been described above, the present invention is not limited to these embodiments, and various modifications may be used in appropriate combinations with one embodiment, and of course, the invention can be implemented in various forms without departing from the spirit of the present invention. [Explanation of Symbols]

[0092] 14. First base plate (first connecting member) 24. Second base plate (second connecting member) 30 dampers 50 Compression limiting member 54 Compression-side bearing plate 70 Tension members 80 Elongation limiting member 80A Extension side bearing plate

Claims

1. A damper connecting the first connecting member and the second connecting member, A compression limiting member is provided on the first connecting member and, when the compression amount of the damper exceeds a predetermined value, contacts the second connecting member and limits the compression of the damper. An extension limiting member is positioned on the opposite side of the first connecting member from the second connecting member and connected to the first connecting member via a tension member, and contacts the second connecting member to limit the extension of the damper when the extension of the damper exceeds a predetermined value, A damper stroke limiting structure equipped with this.

2. The tension member penetrates the second connecting member and connects the compression limiting member and the first connecting member. The damper stroke limiting structure according to claim 1.

3. The compression limiting member has a compression-side bearing plate that faces the second connecting member and makes surface contact with the second connecting member when the compression amount of the damper is greater than or equal to a predetermined value. The compression limiting member has an extension-side support plate that faces the compression-side support plate across the second connecting member and makes surface contact with the second connecting member when the extension amount of the damper exceeds a predetermined value. The tension member penetrates the compression-side bearing plate and the extension-side bearing plate, The damper stroke limiting structure according to claim 2.

4. The first connecting member is a first base plate to which one end of the damper is connected and which extends from that end to one side. The second connecting member is a second base plate to which the other end of the damper is connected and which extends to one side from the other end. The compression limiting member is positioned on one side of the damper and connects the first base plate and the second base plate. A damper stroke limiting structure according to any one of claims 1 to 3.

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