JP2011149143A - Vibration damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration damper which eliminates the need of an excessive vibration energy at the start of plastic deformation even if forces of compression and tension are applied thereto by an earthquake or the like and which can sufficiently exhibit energy absorbing performance by the plastic deformation. <P>SOLUTION: This vibration damper 1 is installed, as a brace, for example, between a base D, a beam H, and columns P1, P2 as the structural members of a building so as to absorb vibration energy generated by an earthquake or the like. The vibration damper includes a considerably long shaft member 2 extending in the axial direction and an plastically deformable tube 6 of circular shape in cross section which is fixed to one end (bottom end) of the shaft member 2 in the axial direction of the shaft member 2. The plastically deformable tube 6 includes a compressively deformable and tensely deformable plastically deformable part 7 at the axial intermediate part over the entire circumference. The deformation of the plastically deformable part 7 changes the axial dimension of the plastically deformable tube 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a vibration damper that is attached between structural materials of a building and absorbs or relaxes vibration energy due to an earthquake or the like to prevent or reduce the influence of the building being damaged or collapsed. About.

Vibration energy from earthquakes appears as pitching and rolling, but usually buildings often collapse due to rolling. Such rolls alternately apply compression and tension to the braces that reinforce the structural material of the building. And when a building collapses, generally it is often caused by energy at the time of compression.
For example, in order to sufficiently absorb vibration energy at the time of compression due to an earthquake, an inner tube with a slightly short length is fitted inside a long outer tube, and the inner and outer tubes are fixed in the middle in the longitudinal direction, A double pipe type brace has been proposed in which a cruciform joint is fixed to both ends where only the outer pipe is located, thereby inducing buckling deformation in which only the outer pipe near both ends expands in the radial direction. (For example, refer to Patent Document 1).

In the case of the above-mentioned double pipe type stiffener, even if it receives the compressive force of earthquake, excessive energy is required until both ends of the outer pipe having a circular cross section in the longitudinal direction are circularly deformed and begin to buckle. Therefore, there is a risk of causing a situation that cannot cope with various earthquakes.
On the other hand, when the energy required for the start of buckling deformation due to compression is set low, there is a problem that the ability to absorb energy due to plastic deformation after the start of buckling decreases.
In addition, there is a problem in that the double pipe type smooth material cannot absorb vibration energy at the time of pulling.

JP-A-8-68109 (pages 1-8, FIGS. 1-7)

  The present invention solves the problems described in the background art, and does not require excessive vibration energy to start plastic deformation even when subjected to compressive force and tensile force due to an earthquake or the like, and absorbs energy due to plastic deformation It is an object to provide a vibration damper capable of fully exhibiting the above.

Means for Solving the Problems and Effects of the Invention

The present invention has been obtained as a result of diligent research and investigations by the inventors to solve the above-mentioned problems. Even if a compression force and a tensile force due to an earthquake or the like are repeatedly received, the plasticity due to each of these forces is obtained. The idea is to use a plastic deformation tube that can be smoothly deformed and repeatedly deformed.
That is, the vibration damper of the present invention (Claim 1) is a vibration damper that is attached between the structural materials of a building and absorbs vibration energy due to an earthquake or the like, and is relatively long along the axial direction. And a plastic deformation tube having a circular cross section fixed along at least one end or the middle of the shaft member along the axial direction of the shaft member, the plastic deformation tube being an intermediate in the axial direction. And a plastic deformation part capable of compressive deformation and tensile deformation, and the deformation of the plastic deformation part changes the axial dimension of the plastic deformation pipe.

  According to this, a plastic deformation tube having a circular cross section and having a plastic deformation portion in the middle in the axial direction is fixed to at least one end of the shaft member or the entire circumference in the middle. Therefore, even when compressive force and tensile force due to an earthquake or the like are repeatedly received, the plastic deformation portion of the plastic deformation tube undergoes compression (buckling) in which the axial dimension of the plastic deformation tube changes due to relatively little vibration energy. Smoothly start deformation and tensile (elongation) deformation. In addition, when the compression deformation and the tensile deformation are alternately repeated, vibration energy can be sufficiently absorbed by the dimensional change along the axial direction of the plastic deformation tube. Therefore, it is possible to absorb or mitigate vibration energy due to earthquakes, etc. by attaching it as a bracing between the structural materials of the building, so it is possible to prevent or reduce the effects such as damage or collapse of the building It becomes.

The shaft member is a pipe or bar having an arbitrary cross section including a circular shape, and includes, for example, a metal pipe having a circular or rectangular cross section, a hard wooden brace, or the like.
In addition, the plastic deformation pipe is subjected to diameter expansion processing or diameter reduction processing from one end side to an end side of a pipe made of, for example, 6000 series aluminum alloy, steel, various alloy steels, or stainless steel. It is. Thereafter, for example, annealing may be performed for each alloy type or steel type as necessary, such as requiring a large deformation.
Further, two plastic deformation pipes may be fixed to both ends of the shaft member, or two to three may be fixed to one or both ends of the middle of the shaft member.
Further, the plastic deformation portion of the plastic deformation tube is a step portion having a cross section substantially perpendicular to the axial direction, and when subjected to an axial compressive force, the plastic deformation portion is plastically deformed into a substantially Z-shaped or S-shaped cross section. When subjected to a tensile force, it is plastically deformed into a form having a substantially conical tapered surface in the middle of the cross section.
In addition, the vibration damper of the present invention can be applied to buildings in the vicinity of vibration energy other than earthquakes, for example, vibrations generated in the vicinity of railway vehicles and highways.

According to the present invention, the plastic deformation portion of the plastic deformation pipe includes an annular step portion that is inclined in a range of 90 ° ± 10 ° with respect to the axial direction of the plastic deformation tube. Item 2) is also included.
According to this, since the plastic deformation portion of the plastic deformation tube includes an annular step portion inclined within a range of 90 ° ± 10 ° with respect to the axial direction of the plastic deformation tube, vibration such as an earthquake occurs. Even under compressive and tensile forces due to energy, it is possible to smoothly start compressive deformation and tensile deformation in which the axial dimension of the plastic deformation tube changes with relatively little vibration energy, and to repeat and stably perform such deformation. To be done.
The step portion of the plastic deformation portion is an annular (ring) -shaped flat surface inclined within a range of 90 ° ± 10 ° with respect to the axial direction of the plastic deformation tube.

Furthermore, in the present invention, the plastic deformation portion of the plastic deformation tube is a portion in which a metal pipe provided with a conical tapered portion in the middle in the axial direction is compressed along the axial direction and buckled and deformed. Further, a vibration damper (claim 3) is also included.
According to this, a metal pipe with uniform inner and outer diameters is expanded or reduced in diameter in advance, and a conical tapered portion is provided in the middle of the axial direction, and the metal pipe with the tapered portion is disposed in the axial direction. By applying pressure along the axial direction, the taper portion is buckled and deformed along the axial direction, whereby the plastic deformation tube having the plastic deformation portion in the middle in the axial direction can be efficiently improved in shape and dimensional accuracy. It becomes possible to produce.
The plastic deformation pipe having the plastic deformation portion can be manufactured by a single process of directly bulging from a metal pipe having a uniform inner and outer diameter.

The present invention also includes a vibration damper (claim 4) in which the plastic deformation portion of the plastic deformation tube is annealed after the buckling deformation.
According to this, when pressure is applied along the axial direction of the metal pipe with the tapered portion, and the tapered portion is buckled and deformed along the axial direction, it is included in the vicinity of the cut portion of the obtained plastic deformation portion. Work hardening and work distortion can be reduced. Therefore, even if a compressive force and a tensile force due to an earthquake or the like are received, the dimensional change of the plastic deformation tube due to the compressive deformation and tensile deformation of the plastic deformation portion can be repeatedly performed a plurality of times.

Further, according to the present invention, there are an outer guide tube having an inner diameter larger than that of the large diameter portion of the plastic deformation tube and an inner guide having an outer diameter smaller than that of the small diameter portion of the plastic deformation tube. A damping damper (Claim 5) is also included, in which the pipe is attached with these axial directions parallel to the axial direction of the plastic deformation pipe.
According to this, even when a compressive force or tensile force in a direction deviated to some extent with respect to the axial direction of the shaft member is received, the inner and outer sides of the plastic deformation tube are parallel to the plastic deformation tube and the outer / inner guide tube. Therefore, it is possible to reliably perform compressive deformation and tensile deformation along the axial direction with respect to the plastic deformation portion of the plastic deformation tube.

In addition, according to the present invention, the outer guide tube and the inner guide tube are connected to a flange that connects the plastic deformation tube and a shaft member, or a flange that attaches the plastic deformation tube to a structural member. A damping damper (Claim 6) having a fixed pipe end is also included.
According to this, one end of the outer / inner guide tube is welded to a flange that connects the plastic deformation tube and the shaft member, or a flange that attaches the plastic deformation tube to a structural material, etc. Thus, the plastic deformation portion of the plastic deformation tube can be reliably compressed and tensile deformed along the axial direction.

The schematic side view which shows the damping damper of one form by this invention. Schematic which shows the manufacturing process of the plastic deformation pipe | tube used for the said damping damper. Schematic which shows the manufacturing process from which the said plastic deformation pipe differs. Schematic which shows the still another manufacturing process of the said plastic deformation pipe | tube. Schematic which shows the aspect of the compression (buckling) deformation | transformation of the said plastic deformation pipe | tube. Schematic which shows the aspect of the tension | pulling (elongation) deformation | transformation of the plastic deformation pipe | tube following FIG. Schematic which shows the deformation | transformation form of the said damping damper. Schematic which shows the damping damper of a different form. Sectional drawing which shows the plastic deformation pipe of a different form. Furthermore, sectional drawing which shows the plastic deformation pipe of a different form.

Hereinafter, modes for carrying out the present invention will be described.
FIG. 1 shows an embodiment according to the present invention in which a base D and a beam H in a building having a wooden frame structure, and columns P1 and P2 adjacent to each other between them are attached as "bars". FIG. 2 is a schematic side view showing the vibration damping damper 1 of FIG.
As shown in FIG. 1, the vibration damper 1 is attached between a bracket B1 fixed to the inner corner of the base D and the column P1, and a bracket B2 fixed to the inner corner of the beam H and the column P2. Fixing between the shaft member 2 that is relatively long along the axial direction along the diagonal direction and the bracket B1 on the lower end (one end) side of the shaft member 2 and along the axial direction of the shaft member 2 The plastic deformation pipe 6 is provided.
The shaft member 2 is made of, for example, an aluminum alloy pipe, and is connected to a flange (not shown) of the bracket B2 via a flange 4 fixed to the upper end thereof. The flange 3 fixed to the lower end of the shaft member 2 is connected to the shaft member 2. The flange 8 fixed to the upper end of the plastic deformation pipe 6 is connected.

Further, the plastic deformation tube 6 is made of, for example, an aluminum alloy, and as shown in the partial sectional view on the right side of the white arrow in FIG. It has a plastic deformation portion 7 which is a ring-shaped step portion, and has a large diameter portion 6a on the shaft member 2 side and a small diameter portion 6b on the bracket B1 side on both sides of the same. . As will be described later, the plastic deformation portion 7 changes the axial dimension of the plastic deformation tube 6, and the annular stepped portion is 90 ° ± with respect to the axial direction of the plastic deformation tube 6. It is inclined in the range of 10 degrees.
As shown in the partial cross-sectional view in FIG. 1, there are an outer guide tube 5 having a larger diameter than the large-diameter portion 6 a of the plastic deformation tube 6, and a narrow diameter of the plastic deformation tube 6. Inner guide tubes 9 having a diameter smaller than that of the diameter portion 6b are arranged with their respective axial directions parallel to and spaced from the axial directions of the shaft member 2 and the plastic deformation tube 6.
The outer guide tube 5 has an upper end (one tube end) fixed to the flange 8 by welding, and the inner guide tube 9 has a lower end (one tube end) connected to the bracket B1. 10 is fixed by welding.

Here, a manufacturing method of the plastic deformation tube 6 will be described.
As shown at the left end of FIG. 2, a metal pipe W0 made of an aluminum alloy (for example, JIS: A6063) and having a uniform inner and outer diameter is prepared. As shown to the right of the white arrow, the metal pipe W0 is shown. , The pointed side of the conical die K1 is inserted into the hollow portion along the axial direction from one end side, and a metal pipe W1 having a large conical tapered portion T on one end side is formed. Next, after the mold K1 is pulled out, as shown on the right side of the white arrow, the tip of the metal pipe W1 is inclined at the same inclination angle as that of the mold K1 (conical shape). ) A cylindrical mold K2 having a portion s is inserted, and the metal pipe W1 is rotated together with the mold K2, and the outer periphery of the tapered portion T of the metal pipe W1 is made of a hard material and rotated. It moves along the axial direction while pressing the roller R whose direction is along the radial direction of the metal pipe W1.

As a result, a metal pipe W2 having a large diameter portion 6a and a small diameter portion 6b coaxially sandwiching a relatively small conical tapered portion t is formed. Then, after the mold K2 is pulled out, as shown at the right end of FIG. 2, a compressive force P facing along the axial direction is applied to the metal pipe W2 so that the taper portion t extends along the axial direction. By performing the buckling deformation, it is possible to form the plastic deformation tube 6 having the plastic deformation portion 7 including a step portion inclined by approximately 90 degrees with respect to the axial direction in the middle of the axial direction. Thereby, the plastic deformation pipe | tube 6 which has the plastic deformation part 7 in which the compressive deformation and tensile deformation which are mentioned later are possible can be manufactured.
For example, the plastic deformation tube 6 made of the aluminum alloy (JIS: A6063) is further annealed at 415 ° C. × 1 to 2 hours as necessary, for example, when a large deformation amount is required. Further, work hardening and work distortion near the plastic deformation portion 7 may be reduced. However, the annealing conditions are appropriately selected according to the type of alloy and the steel type.

Further, as shown at the left end of FIG. 3, a metal pipe W0 ′ made of the same aluminum alloy as described above and having a relatively large inner and outer diameter is prepared. A mold in which a cylindrical portion having the same outer diameter as the inner diameter thereof, the same inclined portion s, and a cylindrical portion having a diameter smaller than the inner diameter of the hollow portion are connected to the hollow portion of W0 ′ along the axial direction. Insert K3. In this state, as shown to the right of the white arrow, the outer peripheral surface of the metal pipe W0 ′ surrounding the inclined portion s and the small-diameter cylindrical portion while rotating the metal pipe W0 ′ together with the mold K3. On the other hand, it moves along the axial direction while pressing the same roller R as described above.
As a result, the metal pipe W3 having the large diameter portion 6a and the small diameter portion 6b is formed with the conical tapered portion t interposed therebetween. Then, after pulling out the mold K3, as shown at the right end of FIG. 3, a compressive force P along the axial direction is applied to the metal pipe W3 to buckle the tapered portion t along the axial direction. By deforming, the plastic deformation tube 6 similar to the above can be manufactured. Thereafter, annealing similar to that described above may be further performed.

Further, as shown at the left end of FIG. 4, a metal pipe W0 made of the same aluminum alloy, having the same inner and outer diameters as described above, and having a slightly longer axial dimension is prepared. As shown next, the metal pipe W0 is inserted and restrained in a cavity C1 having a large inner diameter that penetrates coaxially in the mold K4 and a cavity C2 having the same inner diameter as the outer diameter of the metal pipe W0. Between the cavities C1 and C2, a ring-shaped step portion parallel to the radial direction and a rounded surface along the inner and outer peripheral edges are located.
In this state, as shown on the right side of the white arrow, a pressure fluid HP such as high-pressure oil is filled into the hollow portion from both ends of the metal pipe W0. As a result, the metal pipe W4 having the large diameter portion 6a and the small diameter portion 6b coaxially with the conical tapered portion t interposed therebetween can be manufactured by bulge forming. Then, by cutting and removing the vicinity of both ends of the metal pipe W4 taken out from the mold K4, the plastic deformation tube 6 similar to the above can be manufactured as shown at the right end of FIG. After that, annealing similar to the above may be performed.

The left side of FIG. 5 is an enlarged cross-sectional view showing the vicinity of the plastic deformation pipe 6 in the vibration damper 1, and the right side of FIG. 5 is a cross-sectional view showing a state in which the plastic deformation pipe 6 is compressed and deformed. The left side is a partial cross-sectional view showing the compressed state, the center of FIG. 6 is a partial cross-sectional view showing a state of returning to the original form, and the right side of FIG.
As shown on the left side of FIG. 5, the flange 3 welded to the lower end of the shaft member 2 and the flange 8 welded to the upper end of the large-diameter portion 6 a of the outer guide pipe 5 and the plastic deformation pipe 6 are made thick. A plurality of bolts b penetrating in the direction and a nut n screwed to the flange b, and a flange 10 welded to the small diameter portion 6b of the plastic deformation tube 6 and the lower end of the inner guide tube 9, and the base D and the column P1 The flange B on the bracket B1 side fixed to the inner corner is connected by the same bolt b and nut n as described above.
The plastic deformation portion 7 of the plastic deformation tube 6 is a step portion having an inclination angle θ of 90 degrees with respect to the axial direction of the plastic deformation tube 6.

For example, it is assumed that the vibration damping damper 1 shown on the left side of FIG. 5 first receives a compressive force substantially along the axial direction with the occurrence of an earthquake.
In this case, the plastic deformation tube 6 of the vibration damper 1 has a cross section along the axial direction in the vicinity of the plastic deformation portion 7 with relatively little vibration energy as shown on the right side of the white arrow in FIG. Becomes a plastically deformed portion 7a that is buckled (compressed) so that it is substantially Z-shaped from the crank shape. As a result, the plastic deformation tube 6 absorbs vibration energy applied with the compressive force in the process in which the axial dimension including the large diameter portion 6a and the small diameter portion 6b changes short.
Next, like a general earthquake, the damping damper 1 receives a tensile force substantially along the axial direction of the damping damper 1 immediately after receiving the compressive force along the axial direction. At this time, the plastic deformation portion 7a of the plastic deformation tube 6 of the damping damper 1 is in the above-described state in which the cross section along the axial direction is buckled (7a) in a substantially Z shape as shown on the left side of FIG. Then, as shown partially on the right side of the white arrow in FIG. 6 and in the center of the figure, the cross-section is temporarily returned to the plastic deformation portion 7 having a substantially crank shape, and includes the large diameter portion 6a and the small diameter portion 6b. The axial dimension is almost restored (elongated) to the original dimension.

Subsequently, since the damping damper 1 continuously receives a tensile force substantially along the axial direction, the plastic deformation portion 7 of the plastic deformation tube 6 is shown on the right side of the white arrow in FIG. In the vicinity, an elongation (tensile) deformation 7b in which the cross section along the axial direction changes from a substantially crank shape to a substantially conical shape due to relatively little vibration energy. As a result, the plastic deformation tube 6 absorbs the vibration energy applied along with the tensile force in the process in which the axial dimension including the large diameter portion 6a and the small diameter portion 6b changes long.
Further, just like a general earthquake, immediately after receiving the tensile force along the axial direction, the damping damper 1 continues to receive a compressive force along the substantially axial direction of the damping damper 1. . At this time, the plastic deformation portion 7b of the plastic deformation tube 6 of the vibration damper 1 is partially shown in the left side of the gray arrow in FIG. It returns to the substantially crank-shaped plastic deformation part 7 once, and the axial dimension including the large diameter part 6a and the small diameter part 6b also substantially returns (shortens) to the original dimension.
Subsequently, as shown on the left side of the gray arrow in FIG. 6, the plastic deformation portion 7 further returns to the substantially Z-shaped buckling (compression) deformation 7a. Thereafter, the plastic deformation portion 7a and the plastic deformation portion 7b are alternately and continuously repeated with the plastic deformation portion 7 interposed therebetween.
In addition, when a tensile force substantially along the axial direction is first received with the occurrence of an earthquake, the plastic deformation portion 7 once becomes the plastic deformation portion 7b, and then the plastic deformation portion 7b and the plastic deformation portion. 7a is repeated alternately.

According to the vibration damper 1 as described above, when the compressive force and the tensile force along the substantially axial direction are alternately and repeatedly received during a general earthquake, the plastic deformation portion 7 of the plastic deformation tube 6 is obtained. In the vicinity, after the buckling deformation (7a) from the left side to the right side in FIG. 5 is caused by the relatively small vibration energy, the cross-sectional shape once passes through the cross-sectional shape shown on the left side in FIG. Thus, the expansion deformation (7b) shown on the right side of FIG. 6 is generated. Thereafter, buckling deformation (7a) and extension deformation (7b) are alternately and continuously repeated with the plastic deformation portion 7 interposed therebetween. During this time, vibration energy associated with compressive force due to the buckling deformation (7a) and vibration energy associated with tensile force due to the extension deformation (7b) can be absorbed sufficiently and reliably. In addition, since the inner and outer guide tubes 9 and 5 parallel to the inner and outer sides of the plastic deformation tube 6 are attached, the compressive force and the tensile force are applied in the axial direction of the shaft member 2 and the plastic deformation tube 6. Even if it deviates to some extent, it is certain that the plastic deformation portion 7 and its vicinity are buckled (7a) and elongated (7b).
Therefore, for example, in a one-story or two-story building with a wooden frame structure, straddle along the X and Y directions between the base D, beams H, and pillars P1 and P2 on the first floor in plan view. By attaching the two damping dampers 1 individually, vibration energy due to an earthquake or the like can be absorbed or mitigated, and it is possible to prevent or reduce the influence of the building being damaged or collapsing.

FIG. 7 shows a cross-sectional view of a vibration damper 1a which is a modified form of the vibration damper 1. As shown in FIG.
As shown in FIG. 7, the vibration damper 1 a includes the same shaft member 2, plastic deformation tube 6, and inner / outer guide tubes 9 and 5 as described above. The vibration damper 1a is different from the vibration damper 1 in that the plastic deformation tube 6 is fixed in the opposite direction between the shaft member 2 and the flange 11 of the bracket B1.
That is, as shown in FIG. 7, the flange 3 welded to the lower end of the shaft member 2 and the flange 8 welded to the upper end of the inner guide tube 9 and the small diameter portion 6 b of the plastic deformation tube 6 are a plurality of bolts. b and a nut n, a flange 10 welded to the lower end of the large-diameter portion 6a of the plastic deformation tube 6 and the outer guide tube 5, and a flange 11 on the side of the bracket B1 fixed to the inner corners of the base D and the column P1. Are connected by the same bolt b and nut n as described above.
The vibration damping damper 1a as described above can produce the same effect as the vibration damping damper 1 and can provide the same effect.

FIG. 8 is a schematic view partially including a cross section showing a vibration damper 1b of a different form.
As shown in FIG. 8, the vibration damper 1 b includes a plastic deformation pipe 6 and outer / inner guide pipes 5, 9 between flanges 3, 3 fixed between a pair of coaxial shaft members 2, 2. The flanges 8 and 8 which fixed one or both are connected. Further, one or two flanges 4b and 10b, which are substantially semi-elliptical in a side view, are provided in the axial direction on the outside of the flange 4 on one end (upper end) side and the flange 10 on the other end (lower end) side. Protruding along. The flanges 4b and 10b are connected with a steel plate reinforcing plate (not shown) fixed to the inner corners of the base D and the pillar P1, and the inner corners of the beam H and the pillar P2, with bolts and nuts. Therefore, one or more through holes h are opened.
Even with the vibration damper 1b having the above-described configuration, it is possible to produce the same operation as that of the vibration damper 1 and achieve the same effect.

FIG. 9 is a cross-sectional view showing a plastic deformation tube 6x having a different form.
As shown in FIG. 9, the plastic deformation tube 6x has an inclination angle θ of 80 degrees between the cylindrical large-diameter portion 6a and the small-diameter portion 6b, which is the same as described above, with respect to these axial directions. The plastic deformation portion 7x includes a step portion that is 90 degrees to 10 degrees). According to this plastic deformation tube 6x, since the inclination angle θ of the plastic deformation portion 7x is slightly acute, the buckling (compression) deformation 7a as described above is easily induced by a compressive force with less vibration energy. It becomes possible.

Furthermore, FIG. 10 is a cross-sectional view showing a further different form of plastic deformation tube 6y.
As shown in FIG. 10, the plastic deformation tube 6y has an inclination angle θ of 100 degrees between the cylindrical large-diameter portion 6a and the small-diameter portion 6b, which is the same as described above, with respect to these axial directions. It has a plastic deformation portion 7y including a step portion that is 90 degrees +10 degrees). According to this plastic deformation tube 6x, since the inclination angle θ of the plastic deformation portion 7y is slightly obtuse, the plastic deformation portion 7y reaches the buckling deformation 7a when receiving a compressive force along the axial direction. The amount of plastic deformation along the axial direction is relatively large. Therefore, it becomes possible to absorb more vibration energy accompanying the compression force.
The plastic deformation tubes 6x, 6y can be applied to any of the vibration dampers 1, 1a, 1b, and can be manufactured by any of the methods shown in FIGS.

The present invention is not limited to the embodiments described above.
For example, the shaft member may be a steel pipe, a square steel pipe having a rectangular (square or rectangular) cross section, or an extruded profile having a rectangular cross section and made of an aluminum alloy. Alternatively, it is possible to apply hard wood such as ridges and vertebrae.
Moreover, as long as plastic deformation is easy for a plastic deformation pipe | tube, it is also possible to apply metal pipes, such as a stainless steel pipe and a titanium alloy, for example.
Furthermore, two or more plastic deformation portions can be provided at an axial interval with respect to one plastic deformation tube.

  Since the vibration damper of the present invention is installed between structural materials of a building and absorbs or alleviates vibration energy due to an earthquake or the like, it can prevent or reduce the influence of the building being damaged or collapsing. It can be used to promote the building industry.

1, 1a, 1b ... Damping damper 2 ............... Shaft member 5 ............... Outer guide tube 6, 6x, 6y ... Plastic deformation tube 7, 7x, 7y ... Plastic deformation portion 7a ... …………… Plastic deformation / buckling deformation (compression deformation)
7b ……………… Plastic deformation part / elongation deformation (tensile deformation)
8,10 ………… Flange 9 ………………… Inner guide tube t ………………… Tapered part D …………………… Base (structural material)
H ………………… Beam (structural material)
P1, P2 ......... Pillar (Structural material)

Claims (6)

A damping damper that is installed between building structural materials and absorbs vibration energy from earthquakes, etc.
A relatively long shaft member along the axial direction, and a plastic deformation tube having a circular cross section fixed along the axial direction of the shaft member at least at one end or in the middle of the shaft member,
The plastic deformation tube has a plastic deformation portion capable of compressive deformation and tensile deformation around the entire intermediate circumference in the axial direction, and the deformation of the plastic deformation portion changes the axial dimension of the plastic deformation tube. ,
Damping damper characterized by that. The plastic deformation portion of the plastic deformation tube includes an annular step portion inclined in a range of 90 ° ± 10 ° with respect to the axial direction of the plastic deformation tube.
The vibration damper according to claim 1. The plastic deformation portion of the plastic deformation tube is a portion in which a metal pipe provided with a conical tapered portion in the middle in the axial direction is compressed along the axial direction and buckled and deformed.
The damping damper according to claim 1 or 2, wherein The plastic deformation portion of the plastic deformation tube is annealed after the buckling deformation,
The vibration damper according to claim 3. Inside and outside of the plastic deformation tube, there are an outer guide tube having an inner diameter larger than the large diameter portion of the plastic deformation tube and an inner guide tube having an outer diameter smaller than the small diameter portion of the plastic deformation tube. Is attached with the direction parallel to the axial direction of the plastic deformation tube,
The damping damper according to any one of claims 1 to 4, wherein the damping damper is provided. The outer guide tube and the inner guide tube have one tube end fixed to a flange connecting the plastic deformation tube and a shaft member, or a flange attaching the plastic deformation tube to a structural material,
The vibration damper according to claim 5.

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