JPH10227144A - Brace damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily assemble a brace damper which absorbs the vibrational energy of a structure, and to install the brace damper readily. SOLUTION: In the brace damper 9, a first brace 15, an adapter 16, a hydraulic damper 17, and a second brace 18 are combined by screws. A cylinder cover 24 is bonded with the pipe 19 made of iron of the first brace 15 through the adapter 16 in the hydraulic damper 17, and a cylinder 23 is screwed to the pipe 21 made of iron of the second brace 18. Since the hydraulic damper 17 and the adapter 16 are united with the first brace 15 and the second brace 18 by screws, assembly works are conducted easily while overall length can be adjusted in response to the diagonal size of frames on a first floor. The hydraulic damper 17 and the adapter 16 are rotated around an axis, and the overall length of the brace damper 9 can be adjusted in response to the clearance of a first corner section and a second corner section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brace damper, and more particularly to a brace damper configured to be easy to handle on a construction site of a structure.

[0002]

2. Description of the Related Art As a means for improving the seismic resistance of structures such as buildings and houses, a frame is mounted at a diagonal position of a frame in order to absorb energy for plastically deforming the frame between columns or beams. A damper is attached to the brace to be absorbed to absorb vibration energy of a large earthquake, and a damping structure for damping the frame is being developed.

A conventional brace damper used for such a vibration damping structure is disclosed in, for example, Japanese Patent Laid-Open No. 1-284638.
There is a configuration disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10-26095. In this publication, a damper is mounted as a brace, an end of a cylinder of the damper is connected to one corner of a skeleton, and an end of a piston rod connected to a piston reciprocating in the cylinder. The portion is connected to a corner formed at a diagonal position of the skeleton.

[0004]

However, in the brace damper configured as described above, since the entire brace is formed by the damper, the cylinder and the piston rod, which require processing accuracy, are considerably long (at least 2 to 2). 3m), which is difficult to manufacture.

Further, since the brace damper is attached to a rigid body formed of a steel frame, the amplitude is relatively small, and the stroke of the piston only needs to be about 5 to 10 cm. Therefore, the entire brace does not need to be a damper. . Therefore, in order to absorb the vibration energy of a building such as a building or a house, a more compact configuration than in the above publication can be achieved. Therefore, it has been considered that an iron pipe is welded to both ends of a compact damper having a compact configuration, and an end of the iron pipe is fastened to a corner of the frame by a fastening member such as a bolt or a nut.

However, if the mounting position where the end of the brace is fastened is shifted from the length of the end of the iron pipe, the relative position between the cylinder and the piston of the damper is shifted at the construction site to change the length of the brace. Will be adjusted. However, when the piston is at the intermediate position in the longitudinal direction of the cylinder, the reciprocating stroke of the damper is the same and the vibration energy can be well absorbed, but the relative position between the cylinder and the piston is shifted as described above. When attached, there is a problem that the stroke in one direction is long and the stroke in the reverse direction is short, and the vibration energy of a large earthquake cannot be effectively absorbed.

Therefore, an object of the present invention is to provide a brace damper which solves the above-mentioned problem.

[0008]

In order to solve the above problems, the present invention has the following features. Claim 1
The present invention provides a brace damper having a damper disposed on a brace attached at a predetermined angle in a space formed by columns and beams, wherein the damper and the brace are separably coupled to each other, An adjusting mechanism for adjusting the length in the longitudinal direction is provided at a connection portion between the brace and the brace.

Therefore, according to the first aspect of the present invention, since the damper and the brace are separably connected, and the connecting portion between the damper and the brace is provided with an adjusting mechanism for adjusting the length in the longitudinal direction, the brace is compact. A small damper having such a configuration can be attached, and the stroke of the damper can be secured even if the overall length is adjusted to an arbitrary length according to the attachment position at the installation site.

According to a second aspect of the present invention, there is provided the brace damper according to the first aspect, wherein the adjusting mechanism is provided at an end of the brace, and is provided at a screw portion and at an end of the damper. It is characterized by comprising a male thread portion, and adjusting a coupling length between the brace and the damper from a screw position between the female thread portion and the male thread portion. Therefore, according to the second aspect of the present invention, since the adjusting mechanism is provided at the end of the brace, the coupling length between the brace and the damper is determined based on the screwing position between the threaded portion and the male thread provided at the end of the damper. Since the brace and the damper are rotated to change the screwing position, the length position of the end of the brace can be easily adjusted even at the installation site.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The form will be described. FIG. 1 shows a brace according to the present invention.
Schematic configuration diagram of a structure to which a first embodiment of a damper is attached
It is. Structure 1 is a first-story framing 2 combining steel frames
On the 2nd floor frame 3 with steel frame on top
It is a bone structure, and pillars 4 (4₁~ 4_Three) Is the base
Foundation 5 (5₁~ 5_Three), And the beam 6 of the first floor framing 2
Pillar 4 (4₁~ 4_Three) Is fastened so as to span between the upper ends of
ing. And pillar 7 (7₁~ 7 _Three) Is
The beam 8 of the second-order frame 3 is fastened to the beam 6,₁~ 7
_Three) Is fastened so as to extend across the upper end. The figure
In 1, the outer wall panel, inner wall panel, ceiling panel, etc. are omitted.
I have.

On the diagonal of the first-story frame 2, a brace
The dampers 9 and 10 are attached. This bracedan
Par 9 is the pillar 4 of the first floor frame 2₁And beam 6
First corner 11 and pillar 4_TwoAnd basics 5_TwoAnd formed by
And the second corner portion 12. Also,
The race damper 10 is a pillar 4 of the skeleton 2 on the first floor._TwoAnd basics 5 _Two
And the third corner 13 formed by_ThreeAnd beam 6
And the fourth corner 14 formed by
You.

The brace dampers 9 and 10 are mounted so as to extend in different diagonal directions.
When a directional displacement is applied to the first-story frame 2, a compressive load acts on the brace damper 9 and a tensile load acts on the brace damper 10. When the displacement in the direction B is applied to the first-story frame 2, a tensile load acts on the brace damper 9 and a compressive load acts on the brace damper 10.

As described above, the brace dampers 9 and 10
The compression load or the tensile load is alternately absorbed to attenuate the vibration of the first story frame 2 to prevent the vibration propagated to the second story frame 3 provided above the first story frame 2 from being amplified. Here, the configuration of the brace dampers 9 and 10 will be described. Since the brace dampers 9 and 10 have the same configuration, the configuration of the brace damper 9 will be described below.

FIG. 2 is an enlarged view showing the disassembled brace damper 9, and FIG. 3 is an enlarged view showing the assembled brace damper 9. The brace damper 9 is the first brace 1
5, an adapter 16, a hydraulic damper 17, and a second brace 18. The first brace 15 is a steel pipe 1
The mounting plate 20 is fitted to a slit provided at the end of the nozzle 9 and welded. The mounting plate 20 is provided with a bolt insertion hole 20a.

The adapter 16 is provided for making the pipe diameter of the first brace 15 and the pipe diameter of the second brace 18 equal, and is provided on the inner periphery of the iron pipe 19 and is screwed to the screw 19a. Male screw 16a and hydraulic damper 17
And a female screw 16b to be screwed. In this embodiment,
Since the male screw 16a has the same diameter as the screw diameter of the small diameter side of the hydraulic damper 17 (the screw diameter of the male screw 23a described later), the iron pipes 19 and 21 have a small diameter.

The second brace 18 has the same structure as the first brace 15, and is formed by fitting a mounting plate 22 to a slit provided at an end of an iron pipe 21 and welding. The mounting plate 22 is provided with a bolt insertion hole 22a. The hydraulic damper 17 includes a cylinder 23 as described later.
And a cylinder cover 24. An external thread 23 a that is provided on the inner periphery of the iron pipe 21 and is screwed to the screw 21 a is formed on the outer periphery of the cylinder 23.
On the outer periphery of 4, a male screw 24 a screwed to the female screw 16 b of the adapter 16 is formed. In this embodiment, since the male screw 23a and the male screw 24a have different outer diameters but are connected via the adapter 16, the iron pipe 19
And 21 have the same diameter, so that the first brace 15 and the second brace 18 can be shared.

Accordingly, as shown in FIG. 3, the hydraulic damper 17 is configured such that the cylinder cover 24 is
The cylinder 2 is connected to the steel pipe 19 of the brace 15.
3 is screwed into the iron pipe 21 of the second brace 18.
Also, since the hydraulic damper 17 is attached to the structure 1 having a rigid structure, a relatively small hydraulic damper can be used. The hydraulic damper 17 is provided with the first brace 1.
5. Since it is incorporated in the second brace 18 so as to be separable, it is also possible to replace it with a damper having a different damping force after construction by preparing a plurality of types of dampers in advance.

The hydraulic damper 17 and the adapter 16
Is connected to the first brace 15 and the second brace 18 by screws, so that the assembling work can be easily performed and the total length can be adjusted according to the diagonal dimension of the first-order frame 2. Therefore, each screw part functions as an adjusting mechanism for adjusting the length in the longitudinal direction. An engaging surface 16c for engaging a tool such as a spanner is cut on the outer periphery of the adapter 16.

As described above, the hydraulic damper 17 can be easily
Since the brace 15 and the second brace 18 can be coupled to each other, the damper 17 can be easily replaced even when, for example, the structure 1 is expanded after construction. At the construction site of the structure 1, when the first floor frame 2 is completed, one mounting plate 20 of the brace damper 9 is fixed to the first corner 11 with bolts and nuts, and the other mounting plate 22 is fixed to the second corner. It is fixed to the part 12 with bolts and nuts. At that time, the entire length of the brace damper 9 can be adjusted according to the separation distance between the first corner 11 and the second corner 12 by rotating the hydraulic damper 17 and the adapter 16 around the axis. Therefore, it is possible to secure the stroke of the damper 17 by adjusting the total length of the brace damper 9 to an arbitrary length in accordance with the mounting position at the installation site, and to effectively reduce the vibration energy of a traffic vibration having a small amplitude or a large earthquake. Can be absorbed.

FIG. 4 is a longitudinal sectional view showing the internal structure of the hydraulic damper 17. The hydraulic damper 17 is provided with the cylinder 2 described above.
3 and a cylinder cover 24. A hydraulic chamber 25 and an air chamber 26 are defined inside the cylinder 23, and piston rods 29 are provided on walls 27 and 28 provided at both ends of the hydraulic chamber 25. Insertion holes 27a and 28a to be inserted are provided. The hydraulic chamber 25 contains a viscous fluid 4 such as a viscous oil having a viscosity corresponding to the magnitude of vibration energy predicted in advance.
0 is filled.

Further, on the inner periphery of the insertion holes 27a and 28a,
To prevent the viscous fluid 40 in the hydraulic chamber 25 from leaking, an O-ring 3 for sealing between the piston rod 29
0, 31 are mounted. One end of the piston rod 29 is fixed to the cylinder cover 24 and the piston rod 2
The other end of 9 is inserted into the air chamber 26. Therefore, the piston 32 connected to the intermediate position of the piston rod 29
When the piston moves in the axial direction, the piston rod 29 also slides integrally. However, since the piston rod 29 penetrates the hydraulic chamber 25, the movement of the piston rod 29 causes the hydraulic chamber 25 to move.
It is configured such that no volume change occurs.

The outer peripheral wall defining the air chamber 26 includes:
An air hole 33 for sucking and discharging air in accordance with the sliding operation of the piston rod 29 is provided. The air hole 33 is also used as an engagement hole for inserting a rod such as a driver and rotating the cylinder 23 when rotating the cylinder 23 around the axis. Further, an engagement hole 34 for inserting a rod such as a driver and rotating the cylinder cover 24 is provided on the outer periphery of the cylinder cover 24.

In place of the air holes 33 and the engagement holes 34, two engagement surfaces may be formed by chamfering the outer periphery of the cylinder 23 and the cylinder cover 24 with a tool such as a wrench. good. Inside the piston 32 that reciprocates in the hydraulic chamber 25, a flow path 36 having a check valve 35 that allows a flow in the Xa direction and a flow path 38 that has a check valve 37 that allows a flow in the Xb direction are provided. It is provided in parallel with the direction. Therefore, in the process in which the vibration energy is input to the cylinder 23 and the cylinder cover 24 and the piston 32 slides in the Xa direction as shown in FIG. 5, the viscous fluid 40 filled in the left chamber 25b of the hydraulic chamber 25 receives the check valve. 37, and flows into the right chamber 25a through the flow path 38.

Further, as shown in FIG.
In the process of sliding in the direction b, the viscous fluid 40 filled in the right chamber 25 a of the hydraulic chamber 25 is
And flows into the left chamber 25b. Thus, the hydraulic chamber 2
The viscous fluid 40 filled in 5 absorbs vibration energy input to the cylinder 23 and the cylinder cover 24 by viscous resistance when moving through the flow path 36 or 38 having a narrow flow path area.

FIG. 7 is a schematic diagram showing a modification of the mounting structure of the brace damper. The first floor framework 2 on the diagonal, between each foundation 5 ₁ to 5 ₃ and the beam 6, brace dampers 41 to 44 are attached. Each of the brace dampers 41 to 44 has the same configuration as that of the above-described brace damper 9, and can be adjusted in length in the longitudinal direction.

[0027] Each brace dampers 41 to 44, the mounting plate 20 of the lower portion is fastened to the corners 45 to 48 is a coupling portion between the foundation 5 ₁ to 5 ₃ and the bar 4 _{1-4 3,} the upper portion A mounting portion 49 in which the mounting plate 22 is fixed at an intermediate position of the beam 6,
50. The brace dampers 41 and 42 are
It mounted inclined in opposite V-shape between the pillars 4 ₁ and column 4 _2, brace damper 43 is mounted inclined in inverted V-shape between the pillars 4 ₂ and the bar 4 ₃ ing. Therefore, the number of installed brace dampers is two in comparison with the structure shown in FIG.
Since it is twice, even larger vibration energy can be sufficiently absorbed.

Rather than installing large dampers in preparation for a large earthquake in which large vibration energy is generated, it is more efficient to install more brace dampers 41 to 44 using inexpensive and compact small dampers as shown in FIG. This is advantageous in terms of labor in the process, installation space, transportation, and the like, and enables cost reduction by mass production effects. In this case, A, vibration energy of the B direction between the pillars 4 ₁ and column 4 ₂ is absorbed by the brace dampers 41 and 42, A between the pillars 4 ₂ and the bar 4 _3, B direction of the vibration energy Is the brace damper 4
3, 44 to be absorbed. When a displacement in the direction A is applied to the first-story frame 2, for example, the brace damper 4
A compression load is applied to the brace dampers 41 and 44.
A tensile load acts on 43. When the displacement in the direction B is applied to the first-story frame 2, the brace damper 4
2 and 44 receive a tensile load, and the brace damper 4
A compressive load acts on 1,43.

As described above, the brace dampers 41 to 44
, Alternately absorbs a compressive load or a tensile load, attenuates the vibration of the first-order frame 2 and prevents the vibration transmitted to the second-order frame 3 provided on the upper part of the first-order frame 2 from being amplified. 8 is an exploded enlarged view showing a second embodiment of the brace damper according to the present invention, and FIG. 9 is an enlarged view showing a state where the brace damper of the second embodiment is assembled. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The brace damper 51 includes a first brace 52
, The hydraulic damper 17, the adapter 153, and the second brace 54. The adapter 53 includes a first brace 52
This is for making the pipe diameter of the second brace 54 equal to the pipe diameter of the second brace 54. The external thread 53 a provided on the inner periphery of the iron pipe 55 and screwed to the screw 55 a and the hydraulic damper 17 And a female screw 53b to which the screw 23a is screwed. In this embodiment, since the external thread 53a has the same diameter as the large-diameter side thread diameter of the hydraulic damper 17 (the thread diameter of the external thread 24a), the iron pipes 55 and 56 have a diameter smaller than that of the above-described first embodiment. It has a large diameter.

The outer periphery of the adapter 53 is formed with a cutting surface 53c for engaging a tool such as a spanner. Further, since the hydraulic damper 17 and the adapter 53 are coupled to the first brace 52 and the second brace 54 by screws, the assembly operation can be easily performed and the total length can be adjusted according to the distance of the mounting portion. Has become. Therefore, each screw part functions as an adjusting mechanism for adjusting the length in the longitudinal direction.

FIG. 10 is an exploded enlarged view showing a third embodiment of the brace damper according to the present invention. The brace damper 61 includes a first brace 15 and a hydraulic damper unit 62.
And the second brace 18. The hydraulic damper unit 62 is formed by integrally forming the above-described hydraulic damper 17 and the adapter 16. The male screw 23 a having the same diameter as the male screw 23 a of the cylinder 23 is protruded in the axial direction from the end of the cylinder cover 24. Become.

Accordingly, the male screw 23a of the cylinder 23 is formed at one end of the hydraulic damper unit 62, and the male screw 62a having the same diameter as the male screw 23a is formed at the other end of the hydraulic damper unit 62. Therefore, the first brace 1
5 and the iron pipe 21 of the second brace 18 can have the same diameter, and the first brace 15 and the second
By sharing the brace 18, the manufacturing cost can be reduced. Further, in the present embodiment, since the above-mentioned adapter is unnecessary, the number of parts can be reduced, and the labor in the assembling process can be reduced.

FIG. 11 is an exploded enlarged view showing a fourth embodiment of the brace damper according to the present invention. The brace damper 71 includes a first brace 52 and a hydraulic damper unit 72.
And the second brace 54. The hydraulic damper unit 72 is formed by integrally forming the above-described hydraulic damper 17 and the adapter 53, and has a male screw 24 a having the same diameter as the male screw 24 a of the cylinder cover 24 protruding in the axial direction at the end of the cylinder 23. Become.

Accordingly, the male screw 24a of the cylinder cover 24 is formed at one end of the hydraulic damper unit 72, and the male screw 72a of the same diameter as the male screw 24a is formed at the other end of the hydraulic damper unit 72. . Therefore, the iron pipe 56 of the first brace 52 and the iron pipe 55 of the second brace 54 can have the same diameter.
By sharing the second brace 54 with the second brace 54, the manufacturing cost can be reduced. Further, in the present embodiment, since the above-mentioned adapter is unnecessary, the number of parts can be reduced, and the labor in the assembling process can be reduced.

FIG. 12 is an exploded enlarged view showing a fifth embodiment of the brace damper according to the present invention, and FIG. 13 is an enlarged view showing a state where the brace damper of the fifth embodiment is assembled.
The brace damper 81 includes the first brace 52, the hydraulic damper 17, and the second brace 18. On the inner circumference of the end of the iron pipe 56 of the first brace 52, a female screw 56 a into which the male screw 24 a of the cylinder cover 24 is screwed is formed. On the inner circumference of the end of the iron pipe 21 of the second brace 18, Female thread 21 with which external thread 23a is screwed
a is formed.

Accordingly, as shown in FIG. 13, the hydraulic damper 17 directly connects the first brace 52 and the second brace 52 without using an adapter.
It is screwed into the brace 18 and assembled. In this case, the iron pipe 56 of the first brace 52 has a larger diameter than the iron pipe 21 of the second brace 18. However, since an adapter is not required, it is possible to reduce the number of parts and the labor in the assembly process. it can.

In the above embodiment, the hydraulic damper is detachably mounted between the first brace and the second brace 18, and each is connected by a screw. The configuration in which the length in the direction can be adjusted has been described as an example. However, the configuration is not limited to this, and a damper other than a hydraulic damper (for example, an elastic rubber damper, a friction damper, or the like) may be used, or instead of a screw, a space between members may be used. You may make it slidably fit, and lock it to a predetermined length position with a lock claw or a lock pin.

[0039]

As described above, according to the first aspect of the present invention,
Since the damper and the brace are separably connected, and an adjustment mechanism for adjusting the length in the longitudinal direction is provided at the connection portion between the damper and the brace, a small damper having a compact configuration can be attached to the brace, Even if the total length is adjusted to an arbitrary length according to the mounting position at the installation site, the stroke of the damper can be secured.

According to the second aspect of the present invention, since the adjusting mechanism is provided at the end of the brace, the adjusting mechanism is provided at the end of the brace. In this configuration, the length of the end of the brace can be easily adjusted even at the installation site by changing the screw position by rotating the brace and the damper.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a structure to which a first embodiment of a brace damper according to the present invention is attached.

FIG. 2 is an enlarged view showing a state where a brace damper is disassembled.

FIG. 3 is an enlarged view showing the assembled brace damper.

FIG. 4 is a longitudinal sectional view showing an internal structure of the hydraulic damper.

FIG. 5 is a longitudinal sectional view for explaining an operation when a piston of a hydraulic damper moves in a Xa direction.

FIG. 6 is a longitudinal sectional view for explaining an operation when a piston of a hydraulic damper moves in the Xb direction.

FIG. 7 is a schematic configuration diagram showing a modified example of a mounting structure of a brace damper.

FIG. 8 is an exploded enlarged view showing a second embodiment of the brace damper according to the present invention.

FIG. 9 is an enlarged view showing a state where the brace damper of the second embodiment is assembled.

FIG. 10 is an enlarged view showing a third embodiment of the brace damper according to the present invention in an exploded manner.

FIG. 11 is an exploded enlarged view showing a fourth embodiment of the brace damper according to the present invention.

FIG. 12 is an exploded enlarged view showing a fifth embodiment of the brace damper according to the present invention.

FIG. 13 is an enlarged view showing a state where the brace damper of the fifth embodiment is assembled.

[Explanation of symbols]

1 structure 2 first floor framework 3 second floor framework 4 (4 ₁ to 4 _3), 7 (7 ₁ to 7 ₃₎ Column 5 (5 ₁ to 5 ₃₎ Basic 6,8 beams 9,10,41～44, 51, 61, 71, 81 Brace damper 11 First corner 12 Second corner 13 Third corner 14 Fourth corner 15, 52 First brace 16, 53 Adapter 17 Hydraulic damper 18, 54 2 brace 19, 21, 55, 56 Iron pipe 20, 22 Mounting plate 23 Cylinder 24 Cylinder cover 25 Hydraulic chamber 26 Air chamber 29 Piston rod 32 Piston 26 Air chamber 35, 37 Check valve 40 Viscous fluid 62, 72 Hydraulic damper unit

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tatsuo Suga 1-6-3 Fujimi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Tokiko Corporation

Claims (2)

[Claims] 1. A brace damper comprising a damper disposed on a brace which is attached at a predetermined angle in a space formed by a column and a beam, wherein the damper and the brace are separably connected to each other, A brace damper characterized in that an adjustment mechanism for adjusting a length in a longitudinal direction is provided at a connecting portion between the damper and the brace. 2. The brace damper according to claim 1, wherein the adjusting mechanism comprises a threaded portion provided at an end of the brace, and a male threaded portion provided at an end of the damper. A brace damper characterized in that a coupling length between the brace and the damper is adjusted based on a threaded position between the internal thread portion and the external thread portion.