JP2013064290A - Vibration control metal fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control metal fitting in which a viscoelastic body sheet is hardly released even if it is vibrated a plurality of times, and sufficient vibration control effects can be presented stably.SOLUTION: Connection pieces 17 are mounted to a column or a beam by bolt-nut connection while being overlapped. Viscoelastic body sheets 39, 41 are held between a first mounting plate 3 and a second mounting plate 19 and between the second mounting plate 19 and a reinforcing plate 31 while being deposited, respectively. Therefore, in comparison with the case where the viscoelastic body sheets are not deposited, the viscoelastic body sheets are hardly released even if a great force is applied in a shear direction, and vibration control effects can be presented stably for a long term.

Description

  The present invention relates to a vibration control bracket, and more particularly to a vibration control bracket for reducing the vibration of a building during an earthquake or the like.

A building vibration control bracket usually has a pair of mounting plates, and the pair of mounting plates are connected via a plate-like spring. That is, one end of the plate-like spring is connected to one mounting plate of the pair of mounting plates, and the other end is connected to the other mounting plate so as to be integrated. A viscoelastic sheet (= friction plate) is sandwiched between the pair of mounting plates.
This damping bracket is used with one mounting plate attached to a column and the other mounting plate attached to a horizontal member such as a base or a beam.
When a building shakes due to an earthquake or the like, it is expected that the damping force and the restoring force by the spring and the viscoelastic sheet are used, so that the shaking is settled early and the deformation of the building is suppressed, that is, a vibration control effect is expected.

Japanese Patent Laid-Open No. 2005-200882

By the way, if the viscoelastic sheet is subjected to a large shearing force and peels from one of the mounting plates, the relative deformation force from the pair of mounting plates cannot be received, so that the vibration control effect is greatly reduced. In such a case, it is troublesome to replace the vibration-control fittings one by one, which is an economic burden. In the first place, it is not easy to inspect whether or not the viscoelastic sheet is peeled off in advance.
The present invention has been made paying attention to the above-mentioned conventional problems, and it is difficult for the viscoelastic sheet to be peeled off even when subjected to a plurality of vibrations, and it is possible to stably exhibit a sufficient damping effect. The purpose is to provide seismic brackets.

  The present invention has been made to solve the above-mentioned problems, and the invention of claim 1 includes a pair of mounting plates, each having a connecting portion on one side, and stacked so that the connecting portions are orthogonal to each other, and the pair of mounting plates. In the vibration control fitting including a viscoelastic body sheet sandwiched between the springs provided on the mounting plates and the opposing plate surfaces of the pair of mounting plates, the viscoelastic sheet is attached to the pair of mounting plates. It is a seismic bracket for buildings characterized by being welded.

  According to a second aspect of the present invention, in the building vibration control bracket according to the first aspect, a convex protrusion group protruding from the periphery is formed on the plate surface of the mounting plate facing the viscoelastic body sheet. The viscoelastic sheet is a vibration-damping fitting for a building characterized by being deformed and welded following the shape of each convex protrusion.

  A third aspect of the present invention is the vibration control bracket for a building according to the first or second aspect, wherein the connecting portion is formed by a connecting piece bent at a right angle.

  According to the vibration-damping fitting of the present invention, it is possible to prevent the viscoelastic body sheet from being peeled from the mounting plate, and to stably exhibit a sufficient vibration-damping effect.

It is a perspective view of the state where the damping metal fitting concerning an embodiment of the invention was attached to a pillar and a beam. It is a disassembled perspective view of the damping bracket of FIG. It is a fragmentary sectional view of the damping metal fitting of FIG.

The damping metal fitting 1 which concerns on embodiment of this invention is demonstrated according to drawing.
As shown in FIG. 1, the damping metal fitting 1 is connected and fixed to a column C and a beam B.
The configuration of the damping metal fitting 1 will be described.
The damping metal fitting 1 has a pair of mounting plates 3 and 19 made of steel. Of the pair of mounting plates 3 and 19, one will be described as the first mounting plate 3 and the other as the second mounting plate 19.

  The first mounting plate 3 has a flat plate-like main portion 5, and the main portion 5 has a substantially square shape as a whole, but two corners are small and one corner is notched. A rectangular hole 7 is formed in the vicinity of the outer periphery of the main portion 5 which is largely cut out along the side. Further, three small curved portions 9 having a convex shape on the surface (= the plate surface facing the main portion 5 of the second mounting plate 19) side and a concave shape on the back surface side are formed by pressing, and at the center of each curved portion 9 An insertion hole 11 is formed. Each curved portion 9 is formed in the vicinity of the outer periphery, and is disposed so as to occupy the vertex positions of triangles that are approximate to an equilateral triangle. Further, adjustment is made so that the rectangular hole 7 is disposed between the two curved portions 9.

Reference numeral 13 denotes a small convex protrusion, and a plurality of the convex protrusions 13 are arranged inward of the three curved portions 9, 9, 9 on the surface side of the first mounting plate 3 and spaced apart from each other by a predetermined distance. And a convex projection group 15 is formed. In addition, the height of each convex protrusion 13 is set sufficiently lower than the height of the bending portion 9.
Reference numeral 17 denotes a small rectangular connecting piece as a connecting portion. The connecting piece 17 is formed by bending a portion of the main portion 5 connected to one long side on the side far from the rectangular hole 7 vertically to the surface side.
Reference numeral 20 denotes a reinforcing piece. The reinforcing piece 20 is overlapped and welded on the surface side of the connecting piece 17 and a part of the main portion 5, and on the surface side along the boundary between the main portion 5 and the connecting piece 17. It is bent at a right angle. The connecting piece 17 and the reinforcing piece 20 overlapped with the connecting piece 17 are formed with three attachment holes 18 penetrating them.

The second mounting plate 19 has a shape similar to that of the first mounting plate 3, but the connecting pieces 17 and the reinforcing pieces 20 are overlapped so as to be orthogonal to each other, so that the positions of the connecting pieces 17 are different. Yes.
The main portion 5 is formed with two long holes 21 and one round hole 23. Among them, the long holes 21 and 21 are formed at positions facing the curved portions 9 and 9 facing each other across the rectangular hole 7 of the main portion 5 of the first mounting plate 3, and the round holes 23 are opposed to the remaining curved portions 9. Formed in position. The minor axis dimension of the long hole 21 and the diameter of the round hole 23 are set to a size that allows the bending portion 9 to enter.

As shown in FIG. 2 and FIG. 3, the convex protrusion groups 25 and 27 are similarly provided on the main portion 5 of the second mounting plate 19 on the back surface (= the plate surface facing the surface of the first mounting plate 3). It is formed on the side and both sides of the surface.
The convex projection group 15 formed on the surface of the main portion 5 of the first mounting plate 3 and the convex projection group 25 formed on the back surface of the main portion 5 of the second mounting plate 19 are opposed to each other. The convex protrusions 13 are staggered and do not face each other. Moreover, although the convex projection group 25 and the convex projection group 27 formed on the back surface and the front surface of the second mounting plate 19 are opposed to each other, the convex projections 13 are staggered and are not opposed to each other. .

  Further, one leaf spring mounting base 29 is attached to the main portion 5 of the second mounting plate 19 so as to face the rectangular hole 7 of the first mounting plate 3 and to enter the rectangular hole 7. Similarly, the other plate spring mounting base (not shown) is also mounted on the first mounting plate 3.

Reference numeral 31 denotes a reinforcing plate made of a steel material, and the reinforcing plate 31 has a flat plate shape similar to the main portion 5 of the second mounting plate 19. The reinforcing plate 31 is formed with three similar curved portions 33 facing the curved portion 9 of the first mounting plate 3, and an insertion hole 35 is formed at the center of each curved portion 33. The curved portion 33 has a convex shape on the back side (= plate surface facing the second mounting plate 19) and a concave shape on the front side.
Similarly, a convex projection group 37 is formed on the back surface of the reinforcing plate 31. The convex projection group 27 formed on the surface of the main portion 5 of the second mounting plate 19 and the convex projection group 37 described above are opposed to each other, but the convex projections 13 are staggered and opposed to each other. Not.

Reference numerals 39 and 41 denote square viscoelastic sheets, and the viscoelastic sheets 39 and 41 are made of a styrene-isobutylene thermoplastic elastomer.
The viscoelastic sheets 39 and 41 are sandwiched between the main portions 5 of the first mounting plate 3 and the second mounting plate 19 and between the main portion 5 of the second mounting plate 19 and the reinforcing plate 31, respectively. The viscoelastic sheet 41 covers the convex projection group 15 of the second mounting plate 19 so that the viscoelastic sheet 39 covers the convex projection group 15 of the first mounting plate 3 and the convex projection group 25 of the second mounting plate 19. 27 and the convex projection group 37 of the reinforcing plate 31 are disposed so as to cover each other.

Next, a method for assembling the damping metal fitting 1 will be described.
A viscoelastic sheet 39 is placed on the convex projection group 15 of the main portion 5 of the first mounting plate 3 so that the connecting pieces 17 of the first mounting plate 3 and the second mounting plate 19 are orthogonal to each other. 3, the back side of the main part 5 of the second mounting plate 19 is superposed on the surface side of the main part 5, and then the viscoelastic sheet 41 is placed on the convex projection group 27 of the main part 5 of the second mounting plate 19. Further, the reinforcing plate 31 is overlapped.
At that time, the three curved portions 9, 9, 9 of the first mounting plate 3 and the three curved portions 33, 33, 33 of the reinforcing plate 31 are rounded in the two long holes 21 formed in the second mounting plate 19. The holes 23 are in contact with each other. In this state, the three bolts 43 are respectively inserted from the insertion holes 35 of the reinforcing plate 31, the tip portion is protruded from the back surface of the first mounting plate 3, and the nut 45 is attached to the protruding portion and tightened. Accordingly, the viscoelastic body sheet 39 is sandwiched between the first mounting plate 3 and the second mounting plate 19, and the viscoelastic body sheet 41 is sandwiched between the second mounting plate 19 and the reinforcing plate 31.

  When overlapped as described above, the leaf spring mounting base 29 of the second mounting plate 19 projects through the rectangular hole 7 of the first mounting plate 3 to the back side of the main portion 5 of the first mounting plate 3. It faces a leaf spring mounting base (not shown) mounted on the back side of the main portion 5 of the first mounting plate 3. Accordingly, one end of the leaf spring 47 is inserted and fixed to the protruding leaf spring mounting base 29 and the other end is attached to the back surface of the main portion 5 of the first mounting plate 3 (not shown). By being inserted and fixed to the first mounting plate 3, the first mounting plate 3 and the second mounting plate 19 are passed.

When the assembly is completed as described above, the viscoelastic sheet 39 has the convex projection group 15 on the surface of the main portion 5 of the first mounting plate 3 and the convex projection on the back surface of the main portion 5 of the second mounting plate 19. Deforms following the group 25. Therefore, as shown in FIG. 2, the viscoelastic sheet 39 has not only the plate surface direction (that is, the two-dimensional direction) but also the convex protrusions 13 with respect to the first mounting plate 3 and the second mounting plate 19. Bonding is also performed in the depth direction, which is the peripheral surface, and it is difficult to peel off even when subjected to a shearing force in the plate surface direction. In addition, since the convex projections 13 on the first mounting plate 3 side and the convex projections 13 on the second mounting plate 19 side are staggered and do not face each other, the viscoelastic sheet 39 deforms following the irregularities. However, it does not become extremely thin and cracks are unlikely to occur.
Similarly, the viscoelastic sheet 41 is joined to the second mounting plate 19 and the reinforcing plate 31.

  The damping metal fitting 1 assembled as described above is placed in a heating furnace and heated at 150 ° C. for 120 minutes. As a result, the viscoelastic sheet 39 is welded to the main portion 5 and the convex protrusions 13, and the state shown in FIG. 3 is fixed.

Next, the usage method of this damping metal fitting 1 is demonstrated.
As shown in FIG. 1, the connecting piece 17 of the second mounting plate 19 is superimposed on the beam B of the building, and is driven into the mounting hole 18 through the screw 49 into the beam. Also, the connecting piece 17 of the first mounting plate 3 is overlapped on the pillar C of the building, and is driven into the mounting hole 18 through the screw 49 into the beam.
In this way, the damping metal fitting 1 is attached to the beam B and the column C.

As described above, since the connecting piece 17 of the first mounting plate 3 of the damping bracket 1 is attached to the column C and the connecting piece 17 of the second mounting plate 19 is attached to the beam B, the building shakes due to an earthquake or the like. However, the shaking is settled at an early stage, and the deformation of the building due to the relative deformation of the beam B and the column C can be suppressed.
Moreover, since the viscoelastic sheets 39 and 41 are also bonded to the side surfaces of the convex protrusions 13 and the viscoelastic sheet 39 is welded to the main portion 5 and the convex protrusions 13, shear parallel to the plate surface is achieved. Even if a large force is applied in the direction, it is difficult to peel off. Therefore, the vibration control effect can be exhibited stably over a long period of time.

Three steel plates in which convex projection groups 15, 25, 27, and 37 are respectively formed to imitate the main portion 5 and the reinforcing plate 31 of the first mounting plate 3 and the second mounting plate 19 of the vibration control bracket 1. Prepared. Then, the intermediate steel plates are opposed to protrude upward and retreat downward from the other steel plates, and are superposed with the viscoelastic sheets 39 and 41 sandwiched between the steel plates, and bolts and nets are fastened. An integrated test product was prepared. Moreover, the comparative product of the same structure was produced except the viscoelastic sheet | seats 39 and 41 being not heat-welded with respect to the main part 5 and the convex protrusion 13. FIG.
And when the displacement was investigated by pulling an intermediate steel plate from above and pulling both steel plates from below, it was confirmed that the displacement amount of the test product was significantly smaller than that of the comparative product.

The embodiment of the present invention has been described in detail above. However, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention, it is included in the invention. .
For example, as long as the viscoelastic sheet has thermoplasticity, the type is not particularly limited, but the heating temperature and time of the vibration control fitting 1 are appropriately changed depending on the type of viscoelastic sheet used.
A configuration in which the reinforcing plate 31 is not provided is also possible. In this case, a round hole similar to the round hole 23 is formed instead of the long holes 21 and 21 of the second mounting plate 19.
Moreover, in the said embodiment, although the damping metal fitting 1 was attached to the pillar C and the beam B, you may make it attach to a pillar and a base.

  According to the damping bracket of the present invention, since the damping effect by the viscoelastic sheet can be stably expected over a long period of time, the bracket life is long.

1 ... Damping bracket 3 ... First mounting plate 5 ... Main part
DESCRIPTION OF SYMBOLS 7 ... Rectangular hole 9 ... Curved part 11 ... Insertion hole 13 ... Convex protrusion 15 ... Convex protrusion group 17 ... Connection piece 19 ... 2nd mounting plate 20 ... Reinforcement piece 21 ... Long hole 23 ... Round hole 25 ... Convex protrusion Group 27 ... Convex protrusion group 29 ... Leaf spring mounting base 31 ... Reinforcing plate 33 ... Curved portion 35 ... Insertion hole 37 ... Convex protrusion group 39 ... Viscoelastic sheet 41 ... Viscoelastic sheet 43 ... Bolt 45 ... Nut 47 ... leaf spring 49 ... screw C ... pillar B ... beam

Claims (3)

  Between a pair of mounting plates that have a connecting portion on one side and are overlapped so that the connecting portions are orthogonal to each other, a spring that is provided across the pair of mounting plates, and a plate surface that faces the pair of mounting plates. A vibration damping bracket having a sandwiched viscoelastic material sheet, wherein the viscoelastic material sheet is welded to the pair of mounting plates.   In the building vibration-damping fitting according to claim 1, a convex projection group protruding from the periphery is formed on a plate surface of the mounting plate facing the viscoelastic material sheet, and the viscoelastic material sheet has a convex shape. A vibration-damping fitting for a building characterized by being deformed and welded following the shape of the projection.   3. The vibration control bracket for a building according to claim 1, wherein the connecting portion is formed of a connecting piece bent at a right angle.

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