JP4092298B2 - Damping device and damping structure - Google Patents

Description

  The present invention relates to a vibration damping device spanned on at least one diagonal line of a substantially rectangular space formed by a frame member of a building, and a vibration damping structure in which the vibration damping device is attached to a frame member of a building. .

  Traditionally, many wooden single-family houses have been built as houses in Japan. In this type of building, various devices have been devised to improve earthquake resistance and wind pressure resistance. Specifically, it is assembled by using braces, which are members disposed obliquely with respect to a framework such as a column, a beam, and a foundation, or by using a fire.

  However, in the traditional framework of wooden buildings, timber is used for bracing.For large earthquakes, bracing is broken, the base part is eaten by white ants, corrosion due to humidity, etc. In some cases, the function of

  In the framework as described above, in order to improve the earthquake resistance and wind pressure resistance of the building, vibrations are absorbed by arranging a metal damper at one end of a member that straddles or fires. There are technologies (for example, Patent Documents 1 and 2).

JP 9-317005 A JP 2003-49557 A

  By the way, a vibration control device attached to a building is required to be able to absorb a large vibration such as an earthquake. Although the damping device shown in patent documents 1 and 2 has one damper, a damping device with further excellent damping force is required. In addition, when only one damper is attached, there is a problem that even if large vibration energy such as an earthquake can be absorbed, small vibration energy such as wind cannot be absorbed.

  Moreover, although the vibration absorption wooden building shown in patent document 1 is attached to a beam etc. by a metal fitting, it cannot be attached to the shape which follows a corner part made by joining a pillar and a beam. That is, since it cannot be fixed to both members of the column and the beam, the force for suppressing the distortion of the rectangular structure surrounded by the column and the beam is small.

  Therefore, in view of the above-described problems, the vibration damping device according to the present invention is a building vibration damping device capable of suppressing cost and reducing small vibrations and vibrations caused by large vibrations such as earthquakes and winds. The purpose is to provide a damping structure.

The vibration damping device according to the present invention, in the vibration suppression apparatus to be stretched on at least one diagonal of the space of the formed substantially rectangular by frame members of buildings, upper shaft and a lower disposed on said diagonal A shaft portion comprising a shaft, a first damper portion comprising a coil spring provided between the upper shaft and the lower shaft, and a diagonal line of at least one of the substantially rectangular space portions having a substantially L shape. The mounting brackets that are attached to the opposing corners on the upper side along the adjacent frame members that constitute the corners are different in elasticity from the coil springs, and are attached to both ends of the mounting brackets via hinges. a second damper portion consisting of a leaf spring that is passed, the second thread formed on the end portion of the damper portion of the upper shaft and the lower shaft, the second Was inserted into a through hole formed in the damper section, the damper portion of the second sandwiched between two nuts screwed on the screw, by adjusting the position of the two nuts, the length of the shaft portion And a shaft length adjusting portion for adjusting the angle.

Further, in the vibration damping structure according to the present invention, the vibration damping device is bridged on at least one diagonal line of the substantially rectangular space portion constituted by the frame member of the building, and the vibration damping device includes the diagonal line. A shaft portion composed of an upper shaft and a lower shaft disposed above, a first damper portion composed of a coil spring provided between the upper shaft and the lower shaft, and a substantially L shape, A mounting bracket that is attached to an opposite corner portion on at least one diagonal of a substantially rectangular space portion along an adjacent frame member that constitutes the corner portion, and the elastic force of the coil spring is different from that of the mounting portion. a second damper portion consisting of a leaf spring which is bridged via a hinge at both ends of the bracket, are formed on the end portion of the second damper portion side of the upper shaft and the lower shaft By inserting a screw through a through hole formed in the second damper portion, sandwiching the second damper portion with two nuts screwed into the screw, and adjusting the positions of these two nuts And a shaft length adjusting part for adjusting the length of the shaft part .

The present invention can absorb large vibrations such as earthquakes and small vibrations such as winds by the two members of the first damper part and the second damper part, and can cope with various vibration energy fluctuations. . That is, according to the present invention, the L-shaped mounting bracket provided with the second damper portion is provided in the corner portion of the substantially rectangular space portion, and the first damper portion is provided in the second damper portion of the mounting bracket. By attaching the formed shaft portion, vibrations of various sizes can be absorbed. Furthermore, since the leaf spring of the second damper portion is attached to the mounting bracket via the hinge, the effect as a leaf spring can be further exhibited.

Moreover, since this invention is equipped with the shaft length adjustment part in the edge part of a shaft part, the length of a shaft part is adjusted according to the distance of the diagonal of the substantially rectangular space part comprised by the frame member of a building Therefore, it is possible to deal with various buildings such as existing buildings as well as new buildings.

  Hereinafter, a vibration damping device and a vibration damping structure to which the present invention is applied will be described with reference to the drawings.

  As shown in FIG. 1, a vibration damping structure 1 to which the present invention is applied includes a column 2 upright in the vertical direction, a beam 3 horizontally mounted on the column 2, and the column 2 and the beam 3 joined to each other. It is comprised from the corner part A and the damping device 4 attached over the corner part B made | formed in the position facing this corner part A.

  The pillar 2 and the beam 3 are members made of square material formed from wood. The column 2 and the beam 3 have, for example, a mortise hole formed at a predetermined position where the beam 3 of the column 2 is joined, and a tenon is formed at the end of the beam 3. The tenon at the position and the tenon of the beam 3 are fitted and joined. The member joined to the pillar 2 is not limited to the beam 3 and may be a horizontal member that is horizontally mounted, and may be a base, a girder, a trunk difference, or the like.

  The vibration damping device 4 is bridged on a diagonal line of a substantially rectangular space formed by the two pillars 2 and 2 and the two beams 3 and 3. As shown in FIG. 2, the vibration damping device 4 is formed at a shaft portion 11 having rigidity and composed of an upper shaft 11 a and a lower shaft 11 b, and end portions on the corner portions A and B side of the shaft portion 11. Shaft length adjusting portions 12, 13; a first damper portion 14 provided between the upper shaft 11a and the lower shaft 11b; and a second damper portion 15 attached to the shaft length adjusting portions 12, 13. 16 and mounting brackets 17 and 18 which are attached to the respective second damper portions 15 and 16 and joined to the corner portions A and B. The shaft length adjusting portion 13, the second damper portion 16, and the mounting bracket 18 have the same configurations as the shaft length adjusting portion 12, the second damper portion 15, and the mounting bracket 17, respectively. Is omitted.

  The shaft portion 11 is made of rod-shaped stainless steel having rigidity and a hollow inside, and is composed of an upper shaft 11a and a lower shaft 11b. Shaft length adjusting portions 12 and 13 are provided at end portions of the upper shaft 11a and the lower shaft 11b on the side facing the corner portions A and B, respectively. The shaft portion 11 is provided with a first damper portion 14 between the upper shaft 11a and the lower shaft 11b, and is attached to the second damper portions 15 and 16 via the shaft length adjusting portions 12 and 13. It has been.

As shown in FIG. 3, the shaft length adjusting portion 12 includes a screw portion 12 a formed at an end portion of the upper shaft 11 a on the side connected to the second damper portion 15, and a predetermined portion of the second damper portion 15. It consists of two nuts 12b for fixing in position. The screw portion 12 a is formed to have a diameter that is inserted into the through hole 15 a formed in the second damper portion 15. Further, the screw portion 12a has such a length that the tip of the screw portion 12a does not come into contact with the mounting bracket 17 due to the displacement of the second damper portion 15 due to vibration, and specifically, from the corner portion A to the second damper. It is smaller than the distance to the part 15. The two nuts 12 b are screwed to the screw part 12 a so as to sandwich the second damper part 15, and the shaft part 11 is fixed to the second damper part 15.

  The first damper portion 14 is provided between the upper shaft 11a and the lower shaft 11b of the shaft portion 11 and is provided at a substantially central portion of the shaft portion 11. As shown in FIG. It is comprised from the elastic body 21 which absorbs this vibration, and the cover 22 which covers the elastic body 21. FIG.

  The elastic body 21 is a coil spring, for example, and the outer diameter thereof is smaller than the outer diameter of the shaft portion 11. Further, both ends of the elastic body 21 are fixed to the upper shaft 11a and the lower shaft 11b, respectively. Further, the elastic body 21 acts as a damper against a small external force such as wind.

  The cover 22 is a ring-shaped member made of metal, and has an inner diameter that is slidable in the direction of the arrow X shown in FIG. 4 along the outer periphery of the shaft portion 11, and its length is elastic. The size is longer than the body 21 and covers the elastic body 21.

  The first damper portion 14 and the second damper portions 15 and 16 may have the same elastic force in order to absorb larger vibrations, but different vibration frequencies with different elastic forces. The vibration energy may be absorbed. Specifically, the second damper parts 15, 16 have a smaller elastic force than the first damper part 14, and therefore can absorb a larger vibration than the first damper part 14. Further, since the first damper portion 14 has a larger elastic force than the second damper portions 15 and 16, it can also absorb small vibrations such as wind that the second damper portions 15 and 16 cannot absorb.

  The upper shaft 11 a and the lower shaft 11 b are fixed by fitting the elastic body 21 at the end on the side where the first damper portion 14 is provided, with the same or slightly smaller diameter as the outer diameter of the elastic body 21. Such circular and groove-like recesses 23 and 24 are formed. In addition, the structure which fixes the elastic body 21 to the shaft part 11 is not restricted above, For example, instead of the recessed parts 23 and 24, the edge part of the upper shaft 11a and the lower shaft 11b is the same as the internal diameter of the elastic body 21, or a little. A convex portion having a large diameter may be formed and the elastic body 21 may be fixed.

  The lower shaft 11b is formed with a receiving portion 25 in the vicinity of the end portion on the concave portion 23 side along the outer peripheral edge of the lower shaft 11b so that the cover 22 is not displaced from a predetermined position. The receiving portion 25 is provided only on the lower shaft 11b so that the cover 22 can be moved along the outer peripheral edge portion of the shaft portion 11 by expansion and contraction of the elastic body 21, and the elastic body 21 has a predetermined distance. A restricting piece or the like may be provided on the upper shaft 11a so as not to expand or contract as described above.

  The second damper portion 15 is made of a leaf spring, and a pair of opposed end portions of the metal pieces of the leaf spring are connected to hinge portions 35 and 36 of the mounting bracket 17 described later. The second damper portion 15 has a through hole 15 a formed at a substantially central portion thereof, and the screw portion 12 a of the shaft length adjusting portion 12 is inserted into the through hole 15 a and connected to the shaft portion 11. The second damper portion 15 has an elastic force that can absorb a large vibration such as an earthquake.

  The mounting bracket 17 is made of a rigid metal and is formed in an L shape. The mounting bracket 17 may be L-shaped by bending one piece of metal, or may be formed by joining one end of two pieces of metal. As shown in FIG. 3, the mounting bracket 17 is composed of metal pieces 31, 32, and mounting holes 31 a, 32 a are provided at substantially central portions of the metal pieces 31, 32. The column 2 and the beam 3 are provided with insertion holes 2a and 3a at positions opposite to the mounting holes 31a and 32a, respectively. The mounting bracket 17 is formed by screwing the nut 33b into the bolt 33a inserted through the mounting hole 31a and the insertion hole 2a, and screwing the nut 34b into the bolt 34a inserted through the mounting hole 32a and the insertion hole 3a. 2 and beam 3. Note that the mounting holes 31 a and 32 a provided in the metal pieces 31 and 32 are not limited to one place, and two or more places may be provided to fix the pillars 2 and the beams 3.

  Further, the mounting bracket 17 is provided with hinge portions 35 and 36 at the other ends of the metal pieces 31 and 32, respectively, and the second damper portion 15 is attached thereto.

  Next, a description will be given of how the vibration damping device 4 having the above-described configuration is bridged on a diagonal line of a substantially rectangular space portion constituted by building framework members such as the pillar 2 and the beam 3.

  First, as shown in FIG. 3, the user brings the mounting bracket 17 of the vibration damping device 4 into contact with a predetermined position of the corner portion A, and bolts are inserted into the mounting hole 31 a of the mounting bracket 17 and the insertion hole 2 a of the column 2. 33a is inserted, and the bolt 34a is inserted into the mounting hole 32a of the mounting bracket 17 and the insertion hole 3a of the beam 3, and screwed by the nuts 33b and 34b, respectively. In addition, the user causes the mounting bracket 18 to be screwed to the corner portion B in the same manner as the mounting bracket 17. However, when the user attaches the mounting brackets 17 and 18, for example, a state in which the screw portion 12 a is inserted into the through hole 15 a of the second damper portion 15 in the shaft length adjustment portion 12 in consideration of ease of attachment. However, the two nuts 12b are not screwed and the shaft portion 11 is made to have play. As described above, the mounting bracket 17 of the vibration damping device 4 is attached to the column 2 and the beam 3 by the screwing member including the bolts 33a and 34a and the nuts 33b and 34b. However, the present invention is limited to this. The vibration damping device 4 is attached by a screwing method in which so-called female screws are provided on the pillar 2 and the beam 3 and the bolts 33a and 34a are directly screwed onto the female screws provided on the pillar 2 and the beam 3 without using a nut. You may do it.

  Next, the user screwes the second damper portion 15 between the two nuts 12b at a predetermined position of the shaft length adjusting portion 12. The predetermined position referred to here is a position where the end portion of the screw portion 12a protruding from the corner portion A does not come into contact with the corner portion A when the second damper portion 15 is displaced due to vibration caused by an earthquake or the like. It is. Further, the user attaches the shaft length adjusting portion 13 to the second damper portion 16 in the same manner as the shaft length adjusting portion 12.

  As described above, the user can attach the vibration damping device 4 to a position where the bracing is conventionally provided.

  The vibration damping device 4 spanned on a diagonal line of a substantially rectangular space composed of building framework members such as the pillar 2 and the beam 3 receives a large vibration due to an earthquake or the like. Even if stress that distorts the body is applied, the vibration damping device 4 is mounted at an appropriate position, so that the first damper portion 14 and the second damper portions 15 and 16 of the vibration damping device 4 absorb vibration. It is possible to prevent the rectangular structure from being distorted. Further, the vibration damping device 4 can absorb the vibration by the first damper portion 14 even for a small vibration caused by wind or the like. Since the vibration damping device 4 is provided with two types of vibrations that can be absorbed in the elastic body 21 of the first damper part 14 and the second damper parts 15 and 16, it absorbs vibrations of various magnitudes. Can do.

  Moreover, since the 2nd damper parts 15 and 16 are attached to the attachment brackets 17 and 18 via the hinge, the effect as a leaf | plate spring can be exhibited more.

  Moreover, since the damping device 4 is provided with the shaft length adjustment parts 12 and 13, the length of the diagonal of the substantially rectangular space part comprised by the frame members of buildings, such as the pillar 2 and the beam 3, differs. Can also be attached to objects. Further, since the shaft length adjusting portions 12 and 13 are fixed by two nuts so as to sandwich the leaf spring, the length of the shaft portion 11 can be easily adjusted and the shaft portion 11 can be fixed.

  Furthermore, the vibration damping device 4 is not limited to a new building, but can be easily attached to an existing building by exchanging braces, and can improve the earthquake resistance and wind pressure resistance of the existing building.

  The shaft portion 11, the mounting brackets 17 and 18, the cover 22, etc. of the vibration damping device 4 are not limited to the materials described above, but include, for example, iron, aluminum, stainless steel, or an alloy containing one or more of these metals. It may be formed of any one or more of organic resin materials such as metal materials and reinforced plastics, and inorganic materials such as ceramics.

  Further, the shaft portion 11, the mounting brackets 17 and 18, the cover 22 and the like of the vibration damping device 4 may be, for example, a composite material in which the metal material described above is used as a core material and the periphery of the core material is covered with an organic resin material. Good. In this case, since the periphery is covered with an organic resin, it is possible to prevent condensation, rust, and the like that occur when iron or the like is used as the metal material.

  Further, the first damper portion 14 is not limited to the one using the elastic body 21, and various damping dampers such as a viscous damper and an oil damper can be used, for example.

It is a front view which shows the damping structure to which this invention is applied. It is a perspective view which shows the damping device to which this invention is applied. It is an expanded sectional view of the L-shaped attachment part of the damping device to which this invention is applied. It is an expanded sectional view of the damper part of the damping device to which the present invention is applied.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Damping structure, 2 pillar, 2a Insertion hole, 3 Beam, 3a Insertion hole, 4 Damping device, 11 Shaft part, 11a Upper shaft, 11b Lower shaft, 12, 13 Shaft length adjustment part, 14 1st damper part 15, 16 Second damper part, 15a Through hole, 17, 18 Mounting bracket, 21 Elastic body, 22 Cover, 23, 24 Recessed part, 25 Receiving part, 31, 32 Metal piece, 31a, 32a Mounting hole, 33a, 34a Bolt, 33b, 34b Nut, 35, 36 Hinge

Claims (2)

In the vibration damping device to be stretched on at least one diagonal of the space of the formed substantially rectangular by frame members of a building,
A shaft portion composed of an upper shaft and a lower shaft disposed on the diagonal line;
A first damper portion comprising a coil spring provided between the upper shaft and the lower shaft ;
A mounting bracket that is substantially L-shaped and is attached to an opposite corner portion on at least one diagonal of the substantially rectangular space portion so as to be along an adjacent skeleton member constituting the corner portion ;
A second damper portion made of a leaf spring that is different in elasticity from the coil spring and spans both ends of the mounting bracket via hinges ;
A screw formed on the second damper portion side end of the upper shaft and the lower shaft is inserted into a through hole formed in the second damper portion, and the second damper portion is inserted into the screw. A vibration damping device comprising: a shaft length adjusting portion that adjusts the length of the shaft portion by sandwiching between two nuts to be screwed together and adjusting the positions of the two nuts . A vibration damping device is bridged on at least one diagonal line of a substantially rectangular space constituted by the building framework members,
The vibration damping device includes a shaft portion including an upper shaft and a lower shaft disposed on the diagonal line, a first damper portion including a coil spring provided between the upper shaft and the lower shaft , A mounting bracket that is substantially L-shaped and is attached to an opposing corner portion on at least one diagonal of the substantially rectangular space portion so as to be along an adjacent frame member constituting the corner portion, and the coil spring The elastic force is different from that of the mounting bracket, and is formed at the end of the upper damper and the lower shaft on the second damper portion side, and the second damper portion is formed of a leaf spring that spans both ends of the mounting bracket via hinges. The screw is inserted into a through hole formed in the second damper portion, and the second damper portion is sandwiched between two nuts that are screwed into the screw. By adjusting the position of the bets, damping structure characterized in that it comprises a shaft length adjusting portion for adjusting the length of the shaft portion.

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