JP2012180635A - Joint damper and structure of joint damper part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint damper and a structure of joint damper part, capable of transmitting a load even in the case that an adhesive part is peeled off.SOLUTION: The body part 3A of a second rigid member 3 to be fixed to a column 11 is provided with fitting holes 3c at six places including the four corners. Fixing screws 5B are screwed in a brace member through the fitting holes 3c, so that the body part 3A of the second rigid member 3 is fixed to the brace member 12. Through-holes 4b and 2b passing through a damping member 4 and a first rigid member 2 are arranged corresponding to the respective fitting holes 3c. The through-holes 4b and 2b have a diameter larger than that of the fitting holes 3c.

Description

  The present invention relates to a structure of a joint damper and a joint part used in a wooden building such as a wooden house.

  Conventionally, in detached wooden houses, in order to improve earthquake resistance, reinforcing hardware is fixed to vertical members (columns, etc.) and horizontal members (bases, beams, etc.) at the joints to increase rigidity. It is common.

  In such a structure of the joint portion, it is known to provide a joint damper in order to obtain a damper effect (for example, see Patent Document 1). The joint damper joins the end of the brace to the vertical member and the horizontal member, and includes a first rigid member fixed to the brace member with a fixture, a side surface of the vertical member, and the lateral member. A second rigid member fixed by a fixture between the horizontal surface of the frame and a damping material such as a high attenuation rubber fixed by adhesion between the first and second rigid members, Is firmly established.

JP 2010-024656 A

  The joint damper as described above is used for a long period of time in the installed state. However, in the one described in Patent Document 1, the damping material is bonded to the first and second rigid members. Since it is only fixed by this, there is a possibility that the bonded part may be peeled off during the period of use. If the bonded portion is peeled off, not only the damping effect can be exhibited sufficiently, but also the load from the brace cannot be transmitted to the vertical member or the horizontal member.

  Therefore, an object of the present invention is to provide a joint damper and a structure of a joint portion that can transmit a load even when an adhesive portion is peeled off.

  According to the first aspect of the present invention, in the joint portion that joins the end of the brace to the vertical member, the first rigidity is fixed to the brace through the first mounting hole by the first axial fixture. A member, a second rigid member having a fourth through hole corresponding to the first mounting hole, which is fixed to the vertical member through a second mounting hole by a second shaft-shaped fixture; A joint damper comprising a sheet-like damping material fixed by bonding between the second rigid members and having a first through hole corresponding to the first mounting hole, wherein the first rigid member is: The second through hole is provided, and has a plate-like main body portion on which one surface of the damping material is fixed by adhesion, and the second rigid member includes an attachment portion fixed to the vertical material, and a third And a plate-like main body portion on which the other surface of the damping material is fixed by adhesion. The damping material has a third through hole corresponding to the second through hole, and the second through hole, the third through hole, and the third mounting hole are in a corresponding positional relationship. The third mounting hole is for fixing the second rigid member to the brace with the third shaft-like fixing tool through the third through-hole through hole and the second through-hole. Features. The first and second rigid members are steel plates, metal plates, synthetic resin plates such as FRP, etc., the first to third shaft fixtures are nails, wood screws, etc., and the damping material is high. Damping rubber, polyurethane rubber, butyl rubber, and the like can be used. Adhesion between the first and second rigid members and the damping material includes vulcanization adhesion and adhesion with an adhesive.

  In this way, even if the bonded portion of the damping material is peeled off, the second rigid member is fixed to the bracing member with the third shaft-like fixture, and therefore the load from the bracing member is not changed to the third. Is transmitted to the vertical member through the shaft-shaped fixture.

  As described in claim 2, it is desirable that the second and third through holes have a diameter larger than that of the third mounting hole.

  In this way, the third and second through holes on the brace material side are larger in diameter than the third attachment holes on the vertical material side, so if the adhesive part is not peeled off, The third shaft-shaped fixture can bend within the range of the diameter difference, and the damping performance of the damping material is reliably ensured although affected by the bending rigidity of the third shaft-like fixture.

  That is, when a force is applied from the lateral direction to the wooden frame of the load bearing wall where the building is shaken and the bracing material is provided, the damping material causes the force acting on the bracing material where stress concentration occurs most. It can be absorbed by shear deformation in the compression direction or tension direction of the brace. In other words, energy due to shaking such as an earthquake or strong wind received by the building can be absorbed by the shear deformation of the damping material, and the shaking of the building can be suppressed and stopped early.

  In this case, as described in claim 3, it is desirable that the diameters of the second and third through holes exceed twice the diameter of the third mounting hole.

  In this way, the range in which the third shaft fixture is bent is sufficiently secured.

  According to a fourth aspect of the present invention, in the joint portion that joins the end of the brace to the vertical member, the first rigid member is attached to the brace by the first shaft-like fixture through the first mounting hole. A second rigid member that is fixed and has a fourth through hole corresponding to the first mounting hole with respect to the vertical member is fixed by the second shaft-shaped fixing tool through the second mounting hole, and the first and first A sheet-shaped damping member having a first through hole corresponding to the first mounting hole is fixed between the two rigid members by bonding, and the first rigid member is The second through hole is provided, and has a plate-like main body portion on which one surface of the damping material is fixed by adhesion, and the second rigid member includes an attachment portion fixed to the vertical material, 3 is provided with a plate-like main body portion provided with three mounting holes and the other surface of the damping material being fixed by adhesion. The damping material has a third through hole corresponding to the second through hole, and the second through hole, the third through hole, and the third mounting hole correspond to the corresponding positions. The second rigid member is fixed to the brace by the third shaft-like fixing tool that passes through the third through hole and the second through hole from the third mounting hole. Features.

  In this way, the second rigid member is fixed to the bracing member with the third shaft-like fixture even if the bonding portion of the damping material is peeled off as in the first aspect of the invention. The load from the brace is transmitted to the vertical member through the third shaft fixture.

  In the present invention, since the second rigid member is fixed to the bracing material by the third shaft-shaped fixing device even when the bonding portion of the damping material is peeled off as described above, the third shaft-shaped fixing device Through, the load from the bracing material can be transmitted to the vertical material. That is, the fail-safe effect can be exhibited by utilizing the fixation by the third shaft-like fixture.

It is a front view of the joint damper which concerns on this invention. It is the same side view. It is the bottom view. It is the same rear view. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. It is a front view of the wooden frame (shaft assembly of one line crossing material) used as the load-bearing wall of the wooden building which concerns on this invention. It is the C section enlarged view of FIG. It is a D direction arrow line view of FIG. It is explanatory drawing of a fail safe function. It is a figure which shows the fail safe effect.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 6 show an embodiment of a joint damper according to the present invention. FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a bottom view, FIG. 4 is a rear view, and FIG. 1 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 6 is a cross-sectional view taken along line BB in FIG.

  As shown in FIGS. 1 to 4, the joint damper 1 includes a sheet-like damping material 4 made of high-damping rubber sandwiched between first and second rigid members 2, 3 made of steel plate, and vulcanized or They are integrated by bonding with an adhesive.

  The first rigid member 2 is formed in a substantially square shape having chamfered corners. The second rigid member 3 is formed in an L-shaped cross section, and has a substantially trapezoidal plate-like main body 3A that is slightly larger than the first rigid member 2, and an edge of the longest side of the main body 3A. And a mounting portion 3B extending in a direction orthogonal thereto. The damping material 4 is formed in a square shape slightly smaller than the first rigid member 2 and the main body portion 3A.

  And one side surface of the damping material 4 and one side surface of the first rigid member 2 are surfaces opposite to the side where the mounting portion 3B protrudes from the other side surface of the damping material 4 and the second rigid member 3. Are bonded and integrated.

  In this embodiment, the first and second rigid members 2 and 3 have plate thicknesses of 2.6 mm and 2.3 mm, respectively, and the thickness of the damping material 4 is 5 mm, for example. The plate thickness of the second rigid member 3 is thinner than the plate thickness of the first rigid member 2.

  As shown in FIG. 2, the attachment portion 3B of the second rigid member 3 is provided with a plurality of attachment holes 3a (second attachment holes), and these attachment holes 3a are portions on the main body 3A side. And arranged near each end in the longitudinal direction of the mounting portion. Through this mounting hole 3a, a mounting screw (for example, a wood screw, not shown), which is a second shaft-shaped fixture, is screwed into the column 11 (vertical member), and the second rigid member 3 (mounting portion) is mounted by the mounting screw. 3B) is fixed to the pillar 11.

  Further, as shown in FIGS. 4 and 5, the first rigid member 2 has a plurality of mounting holes 2a (first mounting holes, for example, a diameter of 6 mm) formed near the center, and these mounting holes 2a. The mounting screw 5A, which is the first shaft-shaped fixing tool, is screwed into the brace member 12, and the first rigid member 2 is fixed to the brace member 12 by the attachment screw 5A.

  Corresponding to each mounting hole 2a, as shown in FIGS. 1, 4 and 5, a plurality of through holes 3b (fourth through holes) penetrating the second rigid member 3 (main body portion 3A), and A plurality of through holes 4 a (first through holes) penetrating the damping material 4 are provided. These through holes 3b and 4a have the same size and a larger diameter than the mounting hole 2a, and the diameters of the through holes 3b and 4a are more than twice the diameter of the mounting hole 2a. For example, the mounting hole 2a has a diameter of 6 mm, and the through holes 3b and 4a have a diameter of 12 mm.

  In addition, mounting holes 3c (diameter 6 mm) are formed as third mounting holes at six locations including the four corners of the main body portion 3A of the second rigid member 3, and mounting screws 5B (first mounting holes) are formed through the mounting holes 3c. 3), the second rigid member 3 (main body portion 3A) is directly fixed to the brace 12 by the mounting screw 5B.

  Corresponding to each of the mounting holes 3c, as shown in FIG. 6, the damping member 4 and the first rigid member 2 are provided with through holes 4b and 2b (third and second through holes) penetrating them. It has been. These through holes 4b and 2b are the same size and larger in diameter than the mounting hole 3c, and the diameters of the through holes 4b and 2b are more than twice the diameter of the mounting hole 3c. Accordingly, when the second rigid member 3 (main body portion 3A) is relatively displaced with respect to the first rigid member 2, the mounting screw 5B bends within the range of the diameter difference between the through holes 4b and 2b, thereby reducing the damping material. 4 is subjected to shear deformation so that the damper effect by the damping material 4 is not impaired. For example, the mounting hole 3c has a diameter of 6 mm, and the through holes 4b and 2b have a diameter of 12 mm.

  Then, the installation method of this joint damper 1 is demonstrated along FIGS.

  In the wooden frame 10 shown in FIGS. 7 to 9, 11 is a column that is a vertical member, 12 is a brace member, and 13 and 14 are beams and a base that are horizontal members. The ends of the bracing members 12 are not directly fixed to the columns 11, the beams 13, and the base 14. That is, at the joint portion, the first rigid member 2 is brought into contact with the end of the brace member 12 and the mounting portion 3B of the second rigid member 3 is placed in contact with the side surface of the column 11. ing. Then, the mounting screw 5A is screwed into the mounting hole 3a of the mounting portion 3B, the mounting portion 3B is fixed to the column 11, and the second rigidity is set in the mounting hole 2a of the first rigid member 2 facing the bracing member 12. The mounting screw 5A is screwed through the through holes 3b and 4a from the member 3 side, and the first rigid member 2 is fixed to the bracing material 12.

  At the same time, the mounting screw 5B is screwed into the mounting hole 3c of the main body 3A, the main body 3A is fixed to the brace material 12, and the second rigid member is inserted into the mounting hole 3c of the main body 3A facing the brace material 12. The mounting screw 5B is screwed from the third side through the through holes 4b and 2b, and the second rigid member 3 (main body portion 3A) is fixed to the bracing member 12. Here, since the diameters of the through holes 4b and 2b are larger than the diameter of the shaft portion of the mounting screw 5B (see FIG. 6), the first and second rigid members 2 and 3 are relatively moved by the shear deformation of the damping material 4. Even if it is displaced, the mounting screw 5B is bent and bent so that the damper effect by the damping material 4 is not impaired.

  Thereby, both the 1st and 2nd rigid members 2 and 3 are fixed to the brace 12. The mounting screws 5A and 5B used for fixing the first and second rigid members 2 and 3 are the same, and the number of mounting screws 5B used for fixing the second rigid member 3 to the brace 12 is the first. The number of 1/3 to 1/2 of the mounting screws 5A used for fixing the rigid member 2 to the brace 12 is used.

  If the joint damper 1 is installed in the joint portion in this manner, the brace material 12 and the column 11 are coupled via the joint damper 1. In the same manner, the joint damper 1 is also installed at the opposite end of the brace 12. Note that the attachment holes 3a of the main body 3A of the joint damper 1 are provided scattered throughout, and the attachment holes 3a using the attachment screws 5A and 5B can be appropriately selected according to the attachment angle of the brace material 12. It is like that.

  As a result, when this wooden building is shaken by an earthquake or the like and a horizontal (horizontal) vibration is generated in the wooden frame 10, the compressive force and the tensile force are alternately applied to the brace 12 as the wooden frame 10 is deformed. Act on. Then, the damping material 4 of the joint damper 1 shears and deforms in accordance with the compression direction or the pulling direction of the brace member 12, and efficiently absorbs energy such as earthquakes applied to the wooden frame 10 to suppress shaking. Thus, the building can be prevented from collapsing because the shaking of the building can be effectively suppressed and stopped early. And since the joint damper 1 is installed in the inner cross section of the wooden frame 10, it can be installed in the joint part where the base 14 intersects, and the installation location is not restricted. . Therefore, it is possible to improve the seismic performance by installing the joint damper 1 on each brace material 12 with respect to the wooden frame 10 provided with the brace material 12 on the rack, and installing the joint damper 1. It is possible to easily adjust the rigidity and attenuation of the building by the number. Thus, since the joint damper 1 is installed in the inner cross section of the wooden frame 10, the exterior material can be easily applied without interfering with the exterior material such as the outer wall or the structural plywood.

  In addition, since the main body portion 3A of the second rigid member 3 is fixed to the brace member 12, even if the bonding portion of the damping member 4 to the first or second rigid member 2 or 3 is peeled off, Even if the coupling of the second rigid members 2 and 3 via the damping member 4 is released, the second rigid member 3 and the brace member 12 are connected via the mounting screw 5B (third shaft-shaped fixture). Therefore, the required rigidity at the joint is ensured by the connection by the mounting screw 5B. That is, the load from the brace 12 is transmitted to the column 11 through the mounting screw 5B, and the fail-safe function by the mounting screw 5B is exhibited. As described above, since the diameters of the through holes 4b and 2b are larger than the diameter of the mounting hole 3c, if the damping material 4 is not peeled off, the mounting screw 5B is attached to the damping material 4 or There is no collision with the first rigid member 2, and the damping performance by the damping material 4 is ensured reliably.

  From this, as shown in FIG. 10, the sum of the load that can be received by the damping material 4 (see line B in FIG. 8) and the load that can be received by the mounting screw 5B (see line C in FIG. 8) is the damping material. It can be seen that the load (see line A in FIG. 8) can be received by the combination of 4 and the mounting screw 5B.

  Further, as shown in FIG. 11, even if the bonded portion of the damping material 4 is peeled off, the brace material 13 and the column 11 are coupled by the mounting screw 5B and the second rigid member 3 and can receive a predetermined load. Has been confirmed by experiments.

  In addition to the above, the present invention can be implemented with the following modifications.

  (i) The joint damper 1 can be attached by arranging the bracing material 12 so that the end portions thereof are in contact with the side surface 11a of the vertical material 11 and the upper surface 12a of the base 12. If the joint portion 10 has such a structure, when the wooden frame F receives a force from the lateral direction and a compressive force acts on the brace member 12, the brace member 12 stretches to resist the force from the lateral direction. . On the other hand, when a tensile force acts on the brace member 12, the damping member 4 of the joint damper 1 shears in the pulling direction of the brace member 12, thereby absorbing the energy of the acting force and shaking the wooden frame 10. Can be suppressed.

  (ii) In the above embodiment, the example is shown in which the joint dampers are installed at both ends of the bracing material 12, but it is also possible to provide the joint dampers only on one side, and install the conventional metal fitting on the other side. It is also possible to use in combination.

1 Joint Damper 2 First Rigid Member 2a Mounting Hole (First Mounting Hole)
2b Through hole (second through hole)
3 Second rigid member 3a mounting hole (second mounting hole)
3b Through hole (fourth through hole)
3c Mounting hole (third mounting hole)
4 Damping material 4a Through hole (first through hole)
4b Through hole (third through hole)
5A mounting screw (first shaft fixture)
5B Mounting screw (third shaft fixture)
10 Joint 11 Pillar (vertical material)
11a Side surface 12 Base 12a Top surface (base)
13 Bracing material

Claims (4)

In the joint portion that joins the end of the brace to the vertical member, a first rigid member that is fixed to the brace member through a first mounting hole by a first shaft-like fixture, and the vertical member On the other hand, the second shaft-shaped fixture is fixed through the second mounting hole and has a fourth through hole corresponding to the first mounting hole, and between the first and second rigid members. A damping damper comprising a sheet-like damping material that is fixed by bonding to the sheet and has a first through hole corresponding to the first mounting hole,
The first rigid member has a plate-like main body portion in which a second through hole is provided and one surface of the damping material is fixed by adhesion,
The second rigid member has an attachment portion fixed to the vertical member, and a plate-like main body portion in which a third attachment hole is provided and the other surface of the attenuation material is fixed by adhesion,
The damping material has a third through hole corresponding to the second through hole,
The second through hole, the third through hole, and the third mounting hole are in a corresponding positional relationship,
The third mounting hole is for fixing the second rigid member to the brace with the third shaft-like fixing tool through the third through-hole and the second through-hole. Joint damper.   The joint damper according to claim 1, wherein the second and third through holes have a diameter larger than that of the third mounting hole.   The joint damper according to claim 1 or 2, wherein the diameter of the second and third through holes exceeds twice the diameter of the third mounting hole. In the joint that joins the end of the brace to the vertical member, a first rigid member is fixed to the brace by a first shaft-like fixture through its first mounting hole, On the other hand, a second rigid member having a fourth through hole corresponding to the first mounting hole is fixed by the second shaft-shaped fixture through the second mounting hole, and is interposed between the first and second rigid members. The structure of the joint portion is fixed by bonding a sheet-like damping material having a first through hole corresponding to the first mounting hole,
The first rigid member has a plate-like main body portion in which a second through hole is provided and one surface of the damping material is fixed by adhesion,
The second rigid member has an attachment portion fixed to the vertical member, and a plate-like main body portion in which a third attachment hole is provided and the other surface of the attenuation material is fixed by adhesion,
The damping material has a third through hole corresponding to the second through hole,
The second through hole, the third through hole, and the third mounting hole are in a corresponding positional relationship,
The second rigid member is fixed to the brace by the third shaft-shaped fixture that penetrates the third through hole and the second through hole from the third mounting hole. The structure of the mouth.