JP2014122509A - Vibration control device for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel vibration control device for a building having such a structure that the novel vibration control device for building can be fitted to a rectangular framework of the building and a function as a rotary inertia mass damper can be embodied.SOLUTION: A vibration control device for building 100 includes an upper transmission member 40 fitted to an upper beam 14, a lower transmission member 50 fitted to a lower beam 11, and a vibration control unit 60. The vibration control unit 60 includes a first rack gear 61 fitted laterally to one of the upper transmission member 40 and lower transmission member 50, a first pinion gear 62 fitted to the other and engaging the first rack gear 61, and a weight 63 engaged with the first pinion gear 62 so as to rotate as the first pinion gear 62 rotates.

Description

  The present invention relates to a vibration control device for buildings.

  As a vibration damping device for buildings, for example, Japanese Patent No. 4814857 discloses a rectangular frame composed of a pair of upper and lower horizontal members and a pair of left and right vertical members formed using wooden squares as a framework of a wall portion of a building. A vibration-damping load-bearing wall structure in which a planar member is attached inside is disclosed. The damping load-bearing wall structure disclosed here is a structure in which a pair of left and right divided planar members each having a substantially vertically long shape approximating a shape obtained by vertically dividing the inside of a rectangular frame into two are installed on the rectangular frame. Here, each divided planar member is cut out at the upper and lower corners on one side end face along the longitudinal dividing line. The joint reinforcing metal is in close contact with one side end face and both side faces of the divided planar member. The split planar member is attached to the inside of the rectangular frame with one side end face facing each other being joined to each other with a damping rubber rubber having a thickness of 3 to 50 mm sandwiched between the front plates of the joint reinforcement hardware It has been.

  Japanese Patent Laid-Open No. 2010-70908 proposes a vibration damping structure that is applied to a multi-layer building. Here, a TMD mechanism in which a rotary inertia mass damper and an additional spring are arranged in series between arbitrary layers of a structure constituting a multi-layer building is installed, and its natural frequency is tuned to the primary natural frequency of the structure. Yes. In addition, a rotary inertia mass damper as a vibration isolation mechanism is installed between any other layers of the structure, and the natural frequency determined by the inertia mass and the layer rigidity is tuned to an arbitrary cutoff frequency. Furthermore, a viscous damper such as an oil damper is installed in the layer where the TMD mechanism and the vibration isolating mechanism are installed.

  As described above, the building damping device uses a damping rubber, installs a TMD mechanism in which a rotary inertia mass damper and an additional spring are arranged in series, uses a viscous damper such as an oil damper, Furthermore, there are various proposals such as a combination of these. Among these, the rotary inertia mass damper can exhibit a large resistance especially against a displacement with a large acceleration. As the rotary inertia mass damper, for example, a structure in which a flywheel is fixed to a ball nut of a ball screw mechanism that converts a linear motion of a screw into a rotational motion of a ball nut has been proposed. In such a structure, it is said that an inertial mass effect of several hundred times or more of the actual mass can be exhibited by the rotational inertia moment of the flywheel.

Japanese Patent No. 4814857 JP 2010-70908 A

  By the way, the rotary inertia mass damper has a flywheel connected to a ball screw mechanism and requires a considerable accommodation space. On the other hand, for example, a wall having a frame surrounded by a base, a top beam, and a pillar of a wooden house has a thickness of about 100 mm to 120 mm, for example, and connects the flywheel to the ball screw mechanism as described above. Rotational inertial mass dampers will not fit. Here, focusing on the inertial mass effect of a rotary inertial mass damper, we propose a new building damping device that can be mounted on a rectangular frame of a building to embody its function as a rotary inertial mass damper.

  The proposed building vibration control device is placed in a rectangular frame surrounded by the lower beam of the building, a pair of columns that stand on the lower beam, and an upper beam that spans the pair of columns. Has been. This building vibration damping device includes an upper transmission member, a lower transmission member, and a vibration damping unit. Here, the upper transmission member includes an upper beam side fixing portion that is fixed to the upper beam of the building, and a first unit side fixing portion that is fixed to the vibration suppression unit. The lower transmission member includes a lower beam side fixing portion that is fixed to the lower beam of the building, and a second unit side fixing portion that is fixed to the vibration suppression unit. The vibration control unit includes a first rack gear, a first pinion gear, and a weight. Here, the first rack gear is attached laterally to one of the first unit side fixing portion and the second unit side fixing portion. The first pinion gear is attached to the other fixed portion of the first unit side fixed portion and the second unit side fixed portion, and meshes with the first rack gear. The weight is engaged with the first pinion gear so as to rotate in accordance with the rotation of the first pinion gear.

  According to the vibration control device for a building, the shear displacement generated in the rectangular frame surrounded by the lower beam of the building, the pair of columns standing on the lower beam, and the upper beam spanned between the pair of columns. Is transmitted to the vibration control unit via the upper transmission member and the lower transmission member. In the damping unit, the first pinion gear meshes with the first rack gear according to the shear displacement generated in the upper and lower beams of the rectangular frame, and the first pinion gear rotates. And the weight engaged with the 1st pinion gear rotates according to rotation of the 1st pinion gear. In this way, the building vibration control device is mounted on the rectangular frame of the building to realize the function as a rotary inertia mass damper. In other words, the weight rotates according to the shear deformation generated in the upper and lower beams of the rectangular framework of the building, thereby exerting the mass effect and suppressing the shaking of the building.

  Here, the first rack gear may be attached so as to be parallel to the upper beam.

  Further, the first rack gear may be attached to one of the first unit side fixing portion and the second unit side fixing portion by a pin link. In this case, a pressing mechanism that presses the first pinion gear against the first rack gear may be provided.

  Here, the pressing mechanism includes, for example, a second rack gear provided on the back side of the first rack gear, a second pinion gear meshing with the second rack gear, a second pinion gear, and a second rack gear meshing, and A support member that supports the second pinion gear with respect to the first pinion gear may be provided such that the first pinion gear and the second pinion gear sandwich the first rack gear and the second rack gear.

  The pressing mechanism may include a roller that presses against the back surface of the first rack gear and a support member. Here, the support member may be a member that supports the roller with respect to the first pinion gear such that the roller and the first pinion gear sandwich the first rack gear.

  The pressing mechanism may include a guide for guiding the gear shaft of the first pinion gear relative to the rack gear so that the distance of the gear shaft of the first pinion gear relative to the first rack gear is constant.

  The weight may be attached to the gear shaft of the first pinion gear. In addition, a speed increasing mechanism for speeding up the rotation of the weight with respect to the first pinion gear may be provided.

  Here, the speed increasing mechanism may include, for example, a large-diameter gear that rotates in response to the rotation of the first pinion gear, and a small-diameter gear that has a smaller pitch circle diameter than the large-diameter gear and is connected to the weight. Good.

  In this case, the large-diameter gear and the small-diameter gear are sprockets, respectively, and may include a chain that connects the large-diameter gear and the small-diameter gear. Furthermore, in this case, two idle sprockets attached to an arm swingably attached to the gear shaft of the large-diameter gear, a first chain that connects one of the two idle sprockets to the large-diameter gear, A second chain that connects the other of the idle sprockets to the small-diameter gear may be provided.

  Two weights may be provided so as to face the front and back of the rectangular frame. Furthermore, the mass of the weight may be biased to a position away from the rotation axis of the weight.

FIG. 1 shows a structure of a building wall to which a building damping device is attached. FIG. 2 shows a variation 100A of the building vibration control device. FIG. 3 shows a variation 100B of the building vibration control device. FIG. 4 shows a variation 100C of the building vibration control device. FIG. 5 shows a modification 100D of the building vibration control device. FIG. 6 shows a variation 100E of the building vibration control device. FIG. 7 shows a variation 100F of the building vibration control device. FIG. 8 shows a modification 100G of the building vibration control device. FIG. 9 shows a modification 100H of the building vibration control device. FIG. 10 shows a modification 100I of the building vibration control device. FIG. 11 shows a variation 100J of the building vibration control device. FIG. 12 shows a variation 100K of the building vibration control device. FIG. 13 shows a variation 100L of the building vibration control device. FIG. 14 shows an attachment structure of a weight of a vibration control unit of the building vibration control device. FIG. 15 is a diagram illustrating a modification of the weight of the vibration suppression unit. FIG. 16 is a diagram illustrating a modification of the weight of the vibration control unit. FIG. 17 is a diagram illustrating a modification of the weight of the vibration control unit.

  Hereinafter, a building vibration control device according to an embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment. Moreover, the same code | symbol is attached | subjected suitably to the member or site | part which has the same effect | action. Each drawing is schematically drawn and does not necessarily reflect the real thing. Each drawing shows only an example and does not limit the present invention unless otherwise specified.

<< Building 10 >>
FIG. 1 shows the structure of a wall of a building 10 to which a building damping device 100 is attached. Here, the building 10 is a wooden house. The building vibration control device 100 is mounted in a rectangular frame 20 surrounded by the lower beam 11 of the building 10, the columns 12 and 13, and the upper beam 14. Here, the upper beam 14 and the lower beam 11 to which the building vibration damping device 100 is attached are beams that are vertically opposed to each other (here, the beam includes a foundation). In this embodiment, the building vibration control device 100 is attached to the first floor of the building 10. Here, the lower beam 11 is specifically a base attached to the concrete foundation 30 with anchor bolts, and is hereinafter referred to as the base 11 as appropriate. The upper beam 14 is specifically a second-floor floor beam or a torso spanned between a pair of pillars 12 and 13 erected on a base 11 as a lower beam. It is called the second floor floor beam 14.

  In this embodiment, the pillars 12 and 13 are square members of about 100 mm × 100 mm, and are rectangular shapes surrounded by the base 11, the pair of pillars 12 and 13, and the second-floor floor beam 14 (upper beam). The thickness of the frame 20 is about 100 mm.

  Further, in this embodiment, hole-down hardware 15 and 16 are attached to the columns 12 and 13. The pillars 12 and 13 are fixed by attaching hole-down hardware 15 and 16 to hole-down bolts 31 and 32 embedded in the concrete foundation 30. Further, a foundation packing 34 having a thickness of about 2 cm is attached between the concrete foundation 30 and the base 11, and ventilation in the concrete foundation 30 is ensured.

<< Building damping device 100 >>
As shown in FIG. 1, the building damping device 100 is spanned between a base 11 (lower beam) of the building 10, a pair of columns 12 and 13 erected on the base 11, and a pair of columns 12 and 13. In addition, it is arranged in a rectangular frame 20 surrounded by the second-floor floor beam 14 (upper beam). Here, the building vibration control device 100 includes an upper transmission member 40, a lower transmission member 50, and a vibration suppression unit 60.

<< Upper transmission member 40 >>
The upper transmission member 40 includes an upper beam side fixing portion 41 fixed to the second floor beam 14 (upper beam) of the building 10 and a first unit side fixing portion 42 fixed to the vibration control unit 60. . In the example illustrated in FIG. 1, the upper transmission member 40 is formed on the left pillar 12 and the second floor in the rectangular frame 20 surrounded by the base 11 of the building 10, the pillars 12 and 13, and the second floor beam 14. It is composed of a right-angled triangular truss attached along the corner where the floor beam 14 intersects.

  Here, the truss which comprises the upper transmission member 40 is good to construct | assemble with the square pipe whose thickness is about 3.2 mm by 40 mm x 40 mm, for example. In addition, the size of the square pipe which comprises a truss is not limited to this. Moreover, although the square pipe was illustrated here as a material which comprises a truss, the material which comprises a truss is not limited to a square pipe.

  Here, the right-sided triangular truss constituting the upper transmission member 40 includes a horizontal member 40a, a vertical member 40b, an oblique member 40c, and a horizontal member 40d. Among these members, the cross member 40 a is disposed along the second floor beam 14 of the rectangular frame 20. In FIG. 1, the vertical member 40 b is connected to the left end portion of the cross member 40 a, and extends from the left end portion to the middle portion of the rectangular frame 20 along the left column 12 of the rectangular frame 20. The diagonal member 40c is bridged between the other end (the right end in FIG. 1) of the cross member 40a and the tip (the lower end in FIG. 1) of the vertical member 40b. The horizontal member 40d is stretched between the vertical member 40b and the diagonal member 40c. The cross member 40a, the vertical member 40b, the slant member 40c, and the horizontal member 40d are joined together by joint pins.

  As described above, the upper transmission member 40 is configured by a right-angled triangular truss attached along the corner where the left column 12 and the second floor beam 14 intersect. Here, the upper beam side fixing portion 41 fixed to the upper beam 14 of the building 10 is provided on the cross member 40 a attached to the upper beam 14. Further, the first unit-side fixing portion 42 fixed to the vibration suppression unit 60 is provided at the top where the vertical member 40b and the diagonal member 40c of a right-angled triangular truss intersect.

<< Lower transmission member 50 >>
The lower transmission member 50 includes a lower beam side fixing portion 51 that is fixed to the base 11 (lower beam) of the building 10 and a second unit side fixing portion 52 that is fixed to the vibration suppression unit 60. Here, in the example illustrated in FIG. 1, the lower transmission member 50 is a right-angled triangular truss attached along the corner where the right pillar 13 and the base 11 intersect in the rectangular frame 20. It is configured. Here, the truss constituting the lower transmission member 50 can be configured in the same manner as the trust constituting the upper transmission member 40.

  Here, the right-sided triangular truss constituting the lower transmission member 50 includes a horizontal member 50a, a vertical member 50b, an oblique member 50c, and a horizontal member 50d. Among these, the cross member 50 a is disposed along the base 11 of the rectangular frame 20. In FIG. 1, the vertical member 50 b is connected to the right end portion of the cross member 50 a, and extends from the right end portion to the middle portion of the rectangular frame 20 along the right column 13 of the rectangular frame 20. The diagonal member 50c is bridged between the other end (the left end in FIG. 1) of the cross member 50a and the tip (the upper end in FIG. 1) of the vertical member 50b. The horizontal member 50d is bridged between the vertical members 50b and the diagonal members 50c. The cross member 50a, the vertical member 50b, the slant member 50c, and the horizontal member 50d are joined together by joint pins.

  As described above, the lower transmission member 50 is configured by a right-angled triangular truss attached along the corner where the right column 13 and the base 11 intersect. Here, the lower beam side fixing portion 51 fixed to the base 11 of the building 10 is provided on the cross member 50 a attached to the base 11. Further, the second unit side fixing portion 52 fixed to the vibration control unit 60 is provided at a top portion where the vertical member 50b and the diagonal member 50c of the right-side triangular truss of the lower transmission member 50 intersect.

  In the example shown in FIG. 1, the upper transmission member 40 is provided at the upper left corner of the rectangular frame 20, and the lower transmission member 50 is provided at the lower right corner of the rectangular frame 20. The arrangement of the upper transmission member 40 and the lower transmission member 50 is not limited to this. The upper transmission member 40 and the lower transmission member 50 may be fixed to the second floor beam 14 and the base 11 of the rectangular frame 20. The upper transmission member 40 and the lower transmission member 50 may be fixed to the second floor beam 14 and the base 11 with fastening members such as lag screws, for example.

<Vibration control unit 60>
Next, the vibration control unit 60 will be described. As shown in FIG. 1, the vibration control unit 60 includes a first rack gear 61, a first pinion gear 62, and a weight 63, and constitutes a rotary inertia mass damper. The first rack gear 61 is attached laterally to one of the first unit side fixing portion 42 and the second unit side fixing portion 52. The first pinion gear 62 is attached to the other fixed portion of the first unit side fixed portion 42 and the second unit side fixed portion 52 and meshes with the first rack gear 61.

  In this embodiment, the first rack gear 61 is attached to the second unit side fixing portion 52 of the lower transmission member 50 as shown in FIG. In this embodiment, the first rack gear 61 and the first pinion gear 62 are arranged at the center of the rectangular frame 20. For this reason, an arm 53 extending to the center of the rectangular frame 20 is attached to the tip of the second unit side fixing portion 52 of the lower transmission member 50, and the first rack gear 61 is attached to the arm 53. Here, the arm 53 is attached to the second unit side fixing portion 52 of the lower transmission member 50 with a joining pin. The first rack gear 61 is mounted approximately horizontally in the center of the rectangular frame 20 with the tooth surface facing upward.

  On the other hand, the gear shaft 62 a of the first pinion gear 62 is attached to the first unit side fixing portion 42 of the upper transmission member 40. In this embodiment, an arm 43 extending to the center of the rectangular frame 20 is attached to the tip of the first unit side fixing portion 42 of the upper transmission member 40, and a first pinion gear 62 is attached to the tip of the arm 43. Yes. In this embodiment, the gear shaft 62 a is attached along the normal direction of the rectangular frame 20. Further, in order to maintain an appropriate distance between the arm 43 attached to the first unit side fixing portion 42 and the arm 53 attached to the second unit side fixing portion 52, the spring 45 is attached in an extended state. Yes. The space between the arm 43 and the arm 53 is maintained by the elastic reaction force of the spring 45, and the first pinion gear 62 is securely meshed with the first rack gear 61.

  Although illustration is omitted, instead of the spring 45, the swing shaft 43a of the arm 43 to which the first unit side fixing portion 42 is attached and the swing of the arm 53 to which the second unit side fixing portion 52 is attached. A spring may be attached to the shaft 53a. Then, an elastic reaction force of a spring may be applied in a direction in which the arm 43 and the arm 53 rotate so that the arm 43 and the arm 53 always approach each other. In this case, the first pinion gear 62 and the first rack gear 61 can be reliably engaged with each other. Furthermore, although illustration is omitted, one of the arm 43 to which the first unit side fixing portion 42 is attached and the arm 53 to which the second unit side fixing portion 52 is attached is fixed to the unit side fixing portion. Then, a spring may be attached to the swinging shaft of the other arm, and the other spring may be attached to the unit side fixing portion so as to rotate toward the one arm fixed by the elastic reaction force of the spring. . Even in this case, the first pinion gear 62 and the first rack gear 61 can be reliably engaged with each other.

  Next, the weight 63 is engaged with the first pinion gear 62 so as to rotate in accordance with the rotation of the first pinion gear 62. In this embodiment, the weight 63 is constituted by a disk-shaped weight attached to the gear shaft of the first pinion gear 62. Thus, the weight 63 can be rotated with the rotation of the first pinion gear 62.

<< Operation of Building Damping Device 100 >>
As the base 11 shakes during a large earthquake, the entire building 10 shakes due to the inertial force. At this time, the second floor beam 14 touches the base 11 almost horizontally. For this reason, the rectangular frame 20 surrounded by the base 11 of the building 10, the pillars 12 and 13, and the second-floor floor beam 14 undergoes shear deformation approximately horizontally. In this building vibration control device 100, a lower transmission member 50 is attached to the base 11, and an upper transmission member 40 is attached to the second-floor floor beam 14. For this reason, the rectangular frame 20 is shear-deformed horizontally. At this time, the upper transmission member 40 and the lower transmission member 50 are applied to the vibration suppression unit 60 of the building vibration control device 100 according to the relative displacement between the base 11 and the second floor floor beam 14 of the building vibration control device 100. Relative displacement occurs. Specifically, the distance between the first unit-side fixing portion 42 of the upper transmission member 40 and the second unit-side fixing portion 52 of the lower transmission member 50 approaches or separates.

  In this embodiment, a first pinion gear 62 is attached to the arm 43 attached to the first unit side fixing portion 42 of the upper transmission member 40. A first rack gear 61 is attached to the arm 53 attached to the second unit side fixing portion 52 of the lower transmission member 50. The first rack gear 61 and the first pinion gear 62 are engaged with each other. When the distance between the first unit side fixing portion 42 of the upper transmission member 40 and the second unit side fixing portion 52 of the lower transmission member 50 approaches or separates from each other, the first rack gear 61 and the first pinion gear 62 accordingly. Move relatively.

  At this time, since the first pinion gear 62 is engaged with the first rack gear 61, the first pinion gear 62 rolls on the first rack gear 61. Then, the weight 63 rotates as the first pinion gear 62 rolls. At this time, the weight 63 has a disk shape and receives a considerable inertial force. In particular, when the building 10 swings, the base 11 swings approximately horizontally. The 1st unit side fixing | fixed part 42 and the 2nd unit side fixing | fixed part 52 approach or leave | separate. For this reason, the first pinion gear 62 attached to the first unit side fixing portion 42 moves back and forth while rolling on the first rack gear 61 attached to the second unit side fixing portion 52.

  At this time, the weight 63 generates a required drag force when starting to rotate. For this reason, drag is generated when the building 10 starts to shake. That is, in a small earthquake, the shaking of the building 10 can be reduced. Further, the weight 63 has a considerable inertial force in the rotating direction. For this reason, a required drag is generated when the direction of rotation changes. The direction in which the weight 63 rotates changes at a position where the amplitude (displacement) of the second floor beam 14 with respect to the base 11 becomes maximum. Even when a large amplitude is generated, a considerable drag is generated in the building 10. At this time, the inertial mass effect several times to several hundred times or more than the actual mass of the weight 63 is exhibited by the rotational inertia moment of the weight 63. A great effect is obtained instead of the weight of the weight 63. For this reason, the shake which arises in the building 10 can be restrained small.

<< mass effect (inertial mass Z) >>
Here, the mass effect (inertial mass Z) is the mass component M of the inertial force Ma. In the rotary inertia mass damper, an inertia force corresponding to a mass heavier than the actual mass of the weight 63 can be exhibited. In this embodiment, the weight 63 is a disk-shaped weight, and the formula for calculating the mass effect (inertial mass Z) is as follows.
Z = 0.5 × (πβ / αδ) ² × γ

here,
Z: inertia mass α: number of teeth of first pinion gear 62 β: diameter of weight 63 δ: gear pitch γ of first rack gear 61 γ: mass of weight 63.

Thus, by appropriately adjusting the number of teeth α of the first pinion gear 62, the diameter β of the weight 63, and the gear pitch δ of the first rack gear 61, a mass effect (inertia) larger than the mass γ of the weight 63 is obtained. Mass Z) can be obtained. Thus, according to the vibration control unit 60, a great effect can be obtained instead of the weight of the weight 63.

  At this time, if the weight of the building (for example, if the building damping device 100 is attached to the first floor of the building, the weight of the second floor of the building) is M, the acceleration generated in the building when pulse vibration is input (Input) can be reduced to M / (M + Z). Further, when n building damping devices 100 having a mass effect of Z are attached to the building, the acceleration generated in the building is reduced to M / (M + n × Z) when pulse vibration is input. Can do. Thus, according to the vibration damping device 100 for a building, it is possible to suppress the shaking generated in the building 10 to be small. Furthermore, since the building 10 itself has an effect of attenuating the shaking, the shaking generated in the building 10 can be attenuated at an early stage in combination with the fact that the building damping device 100 can suppress the shaking generated in the building 10 to be small. .

  Note that the formula for calculating the mass effect (inertial mass Z) varies depending on the shape of the weight and its mass distribution. This calculation formula is obtained by physics based on the device structure, and an engineer in this field can create a formula suitable for the device structure.

  The building damping device 100 shown in FIG. 1 has been described above, but the building damping device 100 proposed here is not limited to the above-described embodiment.

  For example, the first rack gear 61 is more preferably attached so as to be parallel to the second floor beam 14 as shown in FIG. Thereby, the 1st pinion gear 62 can be rolled in the direction according to the relative displacement of the base 11 and the 2nd floor floor beam 14. FIG. For this reason, the shake which arises in the building 10 can be restrained small.

  The first rack gear 61 may be attached to one of the first unit side fixing portion 42 and the second unit side fixing portion 52 by a pin link. In this case, a pressing mechanism that presses the first pinion gear 62 against the first rack gear 61 may be provided.

  Further, the upper transmission member 40 and the lower transmission member 50 are configured to reduce the horizontal shear displacement of the lower beam (here, the base 11) and the upper beam (here, the second floor beam 14) of the building of the damping unit 60. The member may be a member that can be transmitted to the rack gear and the pinion gear. For this reason, the upper transmission member 40 and the lower transmission member 50 are not limited to the above-described embodiments. For example, the members of the upper transmission member 40 and the lower transmission member 50 are illustrated as examples joined by pin joining, but the members of the upper transmission member 40 and the lower transmission member 50 are rigid as in welding. You may join by joining. Further, the upper transmission member 40 and the lower transmission member 50 may be reinforced with a face material or the like to further increase the rigidity. The shapes and structures of the upper transmission member 40 and the lower transmission member 50 can be changed as appropriate.

<< Modifications 100A and 100B >>
Here, FIG. 2 and FIG. 3 show modifications 100A and 100B of the building vibration control device. In the building vibration control device 100A, for example, as shown in FIG. 2, the upper transmission member 40A and the lower transmission member 50A are each formed of an isosceles triangular truss. That is, the isosceles triangular truss constituting the upper transmission member 40A and the lower transmission member 50A includes the transverse members 40aA and 50aA and the two diagonal members 40bA, 40cA, 50bA, and 50cA.

  Among these, for the upper transmission member 40 </ b> A, the cross member 40 a </ b> A is disposed along the second-floor floor beam 14 of the rectangular frame 20. The two diagonal members 40bA and 40cA extend obliquely from both side end portions of the cross member 40aA attached to the second-floor floor beam 14 to the central portion of the rectangular frame 20. The cross member 40aA and the two diagonal members 40bA and 40cA are joined by joint pins, respectively.

  Further, with respect to the lower transmission member 50 </ b> A, the cross member 50 a </ b> A is disposed along the base 11 of the rectangular frame 20. The two diagonal members 50bA and 50cA extend obliquely from the both end portions of the cross member 50aA attached to the base 11 to the central portion of the rectangular frame 20. The cross member 50aA and the two diagonal members 50bA and 50cA are joined by joint pins, respectively.

  In this case, the upper transmission member 40A and the lower transmission member 50A each form an isosceles triangle, and the top portions of the upper transmission member 40A and the lower transmission member 50A face each other vertically at the center of the rectangular frame 20. . The first unit side fixing portion 42 and the second unit side fixing portion 52 are provided on the tops of the upper transmission member 40A and the lower transmission member 50A that are opposed to each other in the vertical direction.

  In this case, as shown in FIG. 2, the first pinion gear 62 is attached to the first unit side fixing portion 42 provided in the upper transmission member 40A, and the second unit side fixing portion 52 provided in the lower transmission member 50A is attached to the first unit side fixing portion 52. One rack gear 61 may be attached. Further, as shown in FIG. 3, the first rack gear 61 is attached to the first unit side fixing portion 42 provided in the upper transmission member 40A, and the first pinion is attached to the second unit side fixing portion 52 provided in the lower transmission member 50A. A gear 62 may be attached. In this case, when the first pinion gear 62 meshes with the first rack gear 61, the weight 63 attached to the gear shaft of the first pinion gear 62 rotates. At this time, an inertial mass effect several times to several hundred times or more than the actual mass of the weight 63 is exhibited, and the shaking generated in the building 10 can be suppressed to be small.

<< Modifications 100C to 100E >>
Here, FIGS. 4-6 has shown the modification 100C-100E of the damping device for buildings, respectively.

  If a large shear deformation occurs in the rectangular frame 20 surrounded by the base 11, the pillars 12, 13, and the second floor beam 14 at the time of a large earthquake, strictly speaking, the height of the second floor beam 14 with respect to the base 11 is fluctuate. For this reason, as shown in FIGS. 4 to 6, the building vibration control device ensures that the first pinion gear 62 is pressed against the first rack gear 61 even if a large shear deformation occurs in the rectangular frame 20. It is preferable to provide a pressing mechanism 70 that can be pressed.

<Pushing mechanism>
Such a pressing mechanism 70 may be, for example, the spring 45 described above in the embodiment shown in FIG. However, the pressing mechanism 70 is not limited to this. FIG. 4 illustrates a form provided with the pressing mechanism 70. For example, as shown in FIG. 4, the pressing mechanism 70 includes a second rack gear 71, a second pinion gear 72, and a support member 73.

<< Modification 100C >>
Here, in the building vibration control device 100C shown in FIG. 4, the upper transmission member 40C has a right-angled triangular structure, and is surrounded by the base 11, the pillars 12 and 13, and the second-floor floor beam 14 of the building 10. It is arranged at the upper right of the rectangular frame 20 and is fixed to the second-floor floor beam 14. The lower transmission member 50 </ b> C has a right triangle structure, is arranged at the lower left of the rectangular frame 20, and is fixed to the base 11. And the 1st unit side fixing | fixed part 42 provided in the top part of 40 C of upper side transmission members is located in the intermediate part vicinity of the right pillar 13, and the 2nd unit side provided in the top part of 50 C of lower side transmission members The fixing portion 52 is located near the middle portion of the left column 12. Here, the structures of the upper transmission member 40C and the lower transmission member 50C can be the same as those of the upper transmission member 40 and the lower transmission member 50 (see FIG. 1) of the building vibration damping device 100 described above. Here, detailed description of the upper transmission member 40C and the lower transmission member 50C is omitted.

  In this embodiment, an arm 53 is swingably attached to the second unit side fixing portion 52 provided on the top of the lower transmission member 50C by pin joining. The first rack gear 61 is attached to the arm 53 with the tooth surface facing upward. Further, the second rack gear 71 of the pressing mechanism 70 is attached to the lower side of the arm 53 with the tooth surface facing downward. A support member 73 of the pressing mechanism 70 is attached to the first unit side fixing portion 42 provided on the top of the upper transmission member 40C. The arm 53 may be fixed to the second unit side fixing portion 52.

  Here, the support member 73 is a rectangular truss assembled into a lattice in the vertical and horizontal directions, and the upper and lower horizontal members 73a and 73b are arranged so as to sandwich the arm 53 attached to the second unit side fixing portion 52 up and down. It extends. Among these, the 1st pinion gear 62 which meshes with the 1st rack gear 61 arrange | positioned at the upper side of the arm 53 is attached to the upper horizontal member 73a. A disk-shaped weight 63 is attached to the gear shaft of the first pinion gear 62. A second pinion gear 72 that meshes with a second rack gear 71 disposed on the lower side of the arm 53 is attached to the lower cross member 73b. Here, the interval between the upper and lower horizontal members 73a and 73b of the support member 73 is set so that the first pinion gear 62 and the second pinion gear 72 are always engaged with the first rack gear 61 and the second rack gear 71. .

  In this embodiment, the first pinion gear 62 of the rotary inertia mass damper is appropriately meshed with the first rack gear 61 by the second rack gear 71, the second pinion gear 72, and the support member 73 that constitute the pressing mechanism 70. It is guaranteed. That is, at the time of a big earthquake, a large shear deformation occurs in the rectangular frame 20 surrounded by the base 11, the pillars 12, 13 and the second floor beam 14, and the height of the second floor beam 14 with respect to the base 11 fluctuates. However, the first pinion gear 62 is pressed against the first rack gear 61 of the rotary inertia mass damper. For this reason, when a large earthquake occurs, the rotary inertia mass damper functions properly, and the shaking generated in the building 10 can be suppressed to a small level.

<< Modification 100D >>
Further, for example, like the building vibration control device 100D shown in FIG. 5, the support member 73 has upper and lower cross members 73a to which the gear shafts of the first pinion gear 62 and the second pinion gear 72 are attached. , 73b, a vertical member 73c may be bridged. Thereby, the space | interval (in other words, the space | interval of the gear shaft of the 1st pinion gear 62 and the 2nd pinion gear 72) of the upper and lower horizontal members 73a and 73b can be hold | maintained more accurately. Thereby, a rotation inertia mass damper can be functioned more appropriately.

<< Modification 100E >>
For example, in the building vibration control device 100E shown in FIG. 6, the upper transmission member 40E has an isosceles triangular truss structure, and the lower transmission member 50E has a right triangular truss structure. Here, the first unit-side fixing portion 42 provided at the top of the upper transmission member 40E is located at the center of the rectangular frame 20, and the second unit side provided at the top of the lower transmission member 50E. The fixing portion 52 is located near the middle portion of the left column 12. Here, detailed description of the upper transmission member 40E and the lower transmission member 50E is omitted.

  In this embodiment, an arm 53 is swingably attached to the second unit side fixing portion 52 provided on the top of the lower transmission member 50E by pin joining. The first rack gear 61 is attached to the arm 53 with the tooth surface facing upward. A second rack gear 71 of the pressing mechanism 70 is attached to the lower side of the arm 53 with the tooth surface facing downward. A first pinion gear 62 that meshes with the first rack gear 61 is attached to the first unit-side fixing portion 42 provided at the top of the upper transmission member 40E. A weight 63 is attached to the gear shaft of the first pinion gear 62. Further, a vertical member that is a support member 73 of the pressing mechanism 70 is attached to the gear shaft of the first pinion gear 62. The vertical member 73 as a support member extends to the lower side of the first rack gear 61 (the lower side of the arm 53), and the second rack gear 71 disposed on the back surface of the first rack gear 61 (the lower side of the arm 53). The second pinion gear 72 that meshes with the second pinion gear 72 is supported.

  Thus, the pressing mechanism 70 may include, for example, the second rack gear 71, the second pinion gear 72, and the support member 73. In this case, the second rack gear 71 may be provided on the back side of the first rack gear 61. The second pinion gear 72 may be provided so as to mesh with the second rack gear 71. The support member 73 is configured so that the second pinion gear 72 and the second rack gear 71 mesh with each other, and the first pinion gear 62 and the second pinion gear 72 sandwich the first rack gear 61 and the second rack gear 71. The second pinion gear 72 may be supported with respect to the first pinion gear 62. As shown in FIGS. 4 to 6, in the building vibration control devices 100 </ b> C to 100 </ b> E, it is ensured that the first pinion gear 62 is pressed against the first rack gear 61 by the pressing mechanism 70. Thereby, even if a large shear deformation occurs in the rectangular frame 20, the rotary inertia mass damper can function properly.

<< Modification 100F >>
The structure of the pressing mechanism 70 is not limited to such a form. FIG. 7 shows a modification of the building vibration control device. In the building vibration control device 100F shown in FIG. 7, the structure of the pressing mechanism 70 is different from the building vibration control device 100E shown in FIG. In this embodiment, the pressing mechanism 70 includes a roller 74 and a support member 73. The roller 74 substantially presses against the back surface of the first rack gear 61. That is, here, the vertical member 73 attached to the gear shaft of the first pinion gear 62 and serving as the support member of the pressing mechanism 70 is disposed on the back surface of the first rack gear 61 (below the arm 53). The roller 74 is supported. The support member 73 supports the roller 74 with respect to the first pinion gear 62 such that the roller 74 and the first pinion gear 62 substantially sandwich the first rack gear 61. In such a building vibration control device 100F, it is guaranteed that the first pinion gear 62 is pressed against the first rack gear 61 by the pressing mechanism 70 constituted by the roller 74 and the support member 73. Thereby, even if a large shear deformation occurs in the rectangular frame 20, the rotary inertia mass damper can function properly.

<< Modification 100G >>
Furthermore, the modification of the pressing mechanism 70 is shown. FIG. 8 shows a modification of the building vibration control device. In the building vibration control device 100G shown in FIG. 8, the structure of the pressing mechanism 70 is different from the building vibration control devices 100E and 100F shown in FIGS. In this embodiment, the pressing mechanism 70 has a gear shaft 62a of the first pinion gear 62 with respect to the first rack gear 61 so that the distance of the gear shaft 62a of the first pinion gear 62 with respect to the first rack gear 61 is constant. Is provided with a guide 75 for guiding. Here, the guide 75 is a plate-like member having one end fixed to the side surface of the first rack gear 61 and extending to the track of the gear shaft 62 a of the first pinion gear 62 that meshes with the first rack gear 61. The guide 75 has a guide hole 75a (a long hole in the illustrated example) that guides the gear shaft 62a of the first pinion gear 62 along the track of the gear shaft 62a of the first pinion gear 62.

  By such a guide 75, the distance of the gear shaft 62a of the first pinion gear 62 to the first rack gear 61 is maintained constant, and it is guaranteed that the first pinion gear 62 is pressed against the first rack gear 61. Thereby, even if a large shear deformation occurs in the rectangular frame 20, the rotary inertia mass damper can function properly. In addition, by configuring the pressing mechanism 70 with the guide 75, the number of parts required for the pressing mechanism 70 can be reduced.

<< Modification 100H >>
FIG. 9 further shows a modification of the building vibration control device. In the building damping device 100H shown in FIG. 9, the structure of the lower transmission member 50H is different from the building damping device 100G shown in FIG. Here, the lower transmission member 50H has an isosceles triangular truss structure. The second unit side fixing portion 52 provided on the top of the lower transmission member 50H is opposed to the center portion of the rectangular frame 20 and the lower side of the top portion of the upper transmission member 40E on which the first unit side fixing portion 42 is provided. Yes. The first rack gear 61 is swingably attached to the second unit side fixing portion 52. Thus, the lower transmission member 50 may adopt an isosceles triangular truss structure. Here, detailed description of the lower transmission member 50H is omitted.

<< Attachment structure of weight 63 >>
In the embodiment described above, the weight 63 constituting the rotary inertia mass damper may be attached to the gear shaft 62 a of the first pinion gear 62. In this case, the structure of the rotary inertia mass damper is simple. On the other hand, a speed increasing mechanism that speeds up the rotation of the weight 63 with respect to the first pinion gear 62 may be provided.

<< Modification 100I >>
FIG. 10 shows an example of a building vibration control device provided with a speed increasing mechanism. The building damping device 100I shown in FIG. 10 is different from the building damping device 100H shown in FIG. 9 in that a speed increasing mechanism 80 is provided. Here, the upper transmission member 40I and the lower transmission member 50I each have an isosceles triangular truss structure. The top of the upper transmission member 40I and the top of the lower transmission member 50I are opposed to each other at the center of the rectangular frame 20. Among these, the first rack gear 61 is swingably provided at the top of the lower transmission member 50I, and the first pinion gear 62 is attached to the top of the upper transmission member 40I. Further, a guide 75 is attached to the first rack gear 61 as the pressing mechanism 70, and the gear shaft 62 a of the first pinion gear 62 is inserted into a guide hole 75 a provided in the guide 75.

  Here, the weight 63 is attached to the first pinion gear 62 via the speed increasing mechanism 80. That is, the speed increasing mechanism 80 is interposed between the weight 63 and the first pinion gear 62. Here, the speed increasing mechanism 80 includes a large-diameter gear 81 and a small-diameter gear 82. Here, the large diameter gear 81 has a larger pitch circle diameter than the small diameter gear 82. Here, the pitch circle diameter of the large-diameter gear 81 is about three times larger than that of the small-diameter gear 82. The gear shaft of the large diameter gear 81 is provided on the gear shaft 62 a of the first pinion gear 62. The gear shaft 82a of the small diameter gear 82 is rotatably attached to an intermediate position (intermediate position in the vertical direction) of the upper transmission member 40I so that the small diameter gear 82 meshes with the large diameter gear 81. Here, the gear shaft (62 a) of the large-diameter gear 81 and the gear shaft 82 a of the small-diameter gear 82 are attached along the normal direction of the rectangular frame 20. The weight 63 of the rotary inertia mass damper is attached to the gear shaft 82 a of the small-diameter gear 82.

In this case, the speed increasing ratio of the speed increasing mechanism 80 is determined by the ratio of the pitch circle diameters of the large diameter gear 81 and the small diameter gear 82. That is, in this case, the weight 63 of the rotary inertia mass damper can be rotated at a faster rotational speed than the first pinion gear 62. Here, the mass effect (inertia mass Z) obtained by the rotary inertia mass damper depends on the number of teeth of the first pinion gear 62 and the gear pitch of the first rack gear 61, but the speed increasing ratio ε of the speed increasing mechanism 80 is further increased. Thus, the mass effect (inertial mass Z) can be further increased.

In this embodiment, the formula for calculating the mass effect (inertial mass Z) is as follows.
Z = 0.5 × (πεβ / αδ) ² × γ

here,
Z: inertia mass α: number of teeth of first pinion gear 62 β: diameter of weight 63 δ: gear pitch γ of first rack gear 61 γ: mass of weight 63 ε: speed increasing ratio of speed increasing mechanism 80.

<< Modification 100J >>
Thus, the building vibration control device 100 may include the speed increasing mechanism 80 that increases the rotational speed of the weight 63 of the rotary inertia mass damper. As the speed increasing mechanism 80, a structure including a large diameter gear 81 and a small diameter gear 82 is illustrated. FIG. 11 exemplifies another form of the speed increasing mechanism 80, in which the large-diameter gear 81 and the small-diameter gear 82 are sprockets, arranged at separate positions, and connected by a chain 83. Thus, the structure of the speed increasing mechanism 80 can be exemplified by various structures.

  Further, when a large shear deformation occurs in the rectangular frame 20 surrounded by the base 11, the pillars 12, 13 and the second-floor floor beam 14 at the time of a large earthquake, the height of the second-floor floor beam 14 with respect to the base 11. Fluctuates. For this reason, the relative distance between the upper transmission member 40 and the lower transmission member 50 also varies. At this time, as shown in FIG. 11, in the structure in which the large-diameter gear 81 and the small-diameter gear 82 of the speed increasing mechanism 80 are simply sprockets, arranged at separate positions, and connected by a chain 83, As the distance between the diameter gear 81 and the small diameter gear 82 varies, the chain 83 can be loosened.

<< Modification 100K >>
FIG. 12 illustrates another modification of the speed increasing mechanism 80. For example, as shown in FIG. 12, a swingable arm 85 is attached to the gear shaft of the large-diameter gear 81 (here, the gear shaft 62a of the first pinion gear 62), and an idle sprocket is attached to the tip of the arm 85. 86 is attached. Here, the idle sprocket 86 overlaps two sprockets. The first chain 87 is hung between one sprocket of the idle sprocket 86 and the large-diameter gear 81. Further, the second chain 88 is hung between the other sprocket of the idle sprocket 86 and the small-diameter gear 82.

  Thus, the large-diameter gear 81 attached to the lower transmission member 50I is connected to the small-diameter gear 82 attached to the upper transmission member 40I via the first chain 87, the idle sprocket 86, and the second chain 88. Has been. That is, the idle sprocket 86 is attached to the arm 85 that is swingably attached to the gear shaft 62 a of the large-diameter gear 81. In this case, the distance between the large-diameter gear 81 and the idle sprocket 86 is universal. Even if the distance between the large-diameter gear 81 and the small-diameter gear 82 varies, the distance between the small-diameter gear 82 and the idle sprocket 86 can be kept constant by the arm 85 swinging.

  For this reason, even if a large earthquake occurs and the distance between the large diameter gear 81 and the small diameter gear 82 fluctuates, the speed increasing mechanism 80 is caused to function properly, and the rotational speed of the weight 63 of the rotary inertia mass damper is changed to the first pinion gear. The speed can be increased with respect to 62. Further, the arm 85 and the idle sprocket 86 prevent the first chain 87 and the second chain 88 from loosening. For this reason, for example, a spring (not shown) may be attached to the swing shaft of the arm 85 so that the arm 85 is adjusted to an appropriate swing angle.

<< Modification 100L >>
In this case, the rotational speed of the weight 63 of the rotary inertia mass damper can be further increased with respect to the first pinion gear 62 by changing the gear ratio of the two sprockets provided on the idle sprocket 86. . FIG. 13 illustrates another modification. As shown in FIG. 13, the large-diameter gear 81, the idle sprocket 86, and the small-diameter gear 82 of the speed increasing mechanism 80 may be wound around a single chain 89.

<< Modification of weight 63 >>
As shown in FIG. 14 (XIII-XIII arrow view of FIG. 2), two weights 63 may be provided so as to face the front and back of the rectangular frame 20.

  Moreover, the weight 63 illustrated the disk shape. The disk-shaped weight is suitable for being placed on the wall of the building 10 having a size of about 100 mm to 120 mm, for example. In this case, the mass may be biased to a region close to the outer peripheral edge. 15 to 17 are diagrams showing modifications of the weight 63 of the vibration damping unit 60. FIG. In this case, for example, as shown in FIG. 15, the ring-shaped weight 101, the rotation shaft 102, and the radially attached rods 103 (radiation) connecting the ring-shaped weight 101 and the rotation shaft 102 are configured. May be. Further, the weight 63 is not limited to a disk shape, and can take any shape. For example, as shown in FIG. 16, the weight 63 may have a rod shape. Furthermore, as shown in FIG. 17, the weight 63 may be a rod 113 with mass bodies 111 and 112 attached to both ends and the mass being biased to both ends. In this way, a larger mass effect (inertial mass Z) can be obtained by separating the mass portion (for example, the mass bodies 111 and 112) of the weight 63 from the rotating shaft 102 of the weight 63. That is, the mass of the weight 63 is preferably biased to a position away from the rotation axis of the weight 63.

  Further, as shown in FIG. 17, the mass bodies 111 and 112 of the weight 63 may be disposed in the gap 20 </ b> A excluding the upper transmission member 40 and the lower transmission member 50 in the rectangular frame 20. Thereby, space saving of the vibration damping device 100 for buildings can be achieved. Since the mass bodies 111 and 112 of the weight 63 can be arranged in the gap 20A except for the upper transmission member 40 and the lower transmission member 50, it is possible to arrange the thick mass bodies 111 and 112 in the normal direction of the rectangular frame 20. it can.

  As described above, the building vibration damping device 100 includes the lower beam 11 of the building 10, the pair of columns 12 and 13 erected on the lower beam 11, and the bridge 10 laid over the pair of columns 12 and 13. It is arranged in a rectangular frame 20 surrounded by the beam 14.

  Here, the building vibration control device 100 includes an upper transmission member 40, a lower transmission member 50, and a vibration suppression unit 60, as shown in FIG. Here, the upper transmission member 40 includes an upper beam side fixing portion 41 fixed to the upper beam 14 of the building 10 and a first unit side fixing portion 42 fixed to the vibration control unit 60. The lower transmission member 50 includes a lower beam side fixing portion 51 fixed to the lower beam 11 of the building 10 and a second unit side fixing portion 52 fixed to the vibration damping unit 60. The vibration control unit 60 includes a first rack gear 61, a first pinion gear 62, and a weight 63. Here, the first rack gear 61 is laterally attached to one of the first unit side fixing portion 42 and the second unit side fixing portion 52. The first pinion gear 62 is attached to the other fixed portion of the first unit side fixed portion 42 and the second unit side fixed portion 52 and meshes with the first rack gear 61. The weight 63 is engaged with the first pinion gear 62 so as to rotate according to the rotation of the first pinion gear 62.

  According to the building damping device 100, the shear generated in the upper and lower beams 14 and 11 of the rectangular frame 20 surrounded by the lower beam 11 of the building 10, the pair of columns 12 and 13, and the upper beam 14. The displacement is transmitted to the vibration control unit 60 via the upper transmission member 40 and the lower transmission member 50. In the vibration damping unit 60, the first pinion gear 62 is engaged with the first rack gear 61 in accordance with the shear displacement generated in the upper and lower beams 14, 11 of the rectangular frame 20, and the first pinion gear 62 rotates. Then, according to the rotation of the first pinion gear 62, the weight 63 engaged with the first pinion gear 62 rotates. As described above, the building vibration control device 100 is mounted on the rectangular frame 20 of the building 10 to realize a function as a rotary inertia mass damper. That is, the weight 63 rotates according to the shear deformation generated in the upper and lower beams 14 and 11 of the rectangular frame 20 of the building 10, thereby exerting a mass effect and suppressing the shaking of the building 10.

  As described above, the building vibration control device 100 can be attached to the rectangular frame 20 of the building 10 and is suitable as a vibration control device that suppresses vibration generated in the building 10 to be small. The building damping device according to the present invention is not limited to any of the above-described embodiments and modifications thereof, unless otherwise specified.

  For example, in the embodiment described above, the building damping device 100 is illustrated as being attached to the first floor of the building 10, but the building damping device 100 may be attached to the second floor or more of the building 10. Good. The building vibration control device 100 can be applied not only to a wooden building but also to various buildings. For example, it can be effectively attached to a reinforced concrete building or a steel structure building.

  As described above, the building damping device 100 can obtain a large mass effect instead of the weight of the weight 63, and can suppress the vibration generated in the building 10 to be small. Assuming that the weight of the building 10 (for example, the weight of the second floor of the building when the building damping device 100 is attached to the first floor of the building) is M, the acceleration generated in the building 10 when pulse vibration is input ( Input) can be reduced to M / (M + Z). Further, when n building damping devices 100 having a mass effect of Z are attached to the building, the acceleration generated in the building is reduced to M / (M + n × Z) when pulse vibration is input. Can do.

  In this case, if M / (M + n × Z) is about 0.9, the vibration (acceleration) generated in the building 10 can be reduced to about 90%. Further, if M / (M + n × Z) is about 0.5, the shaking generated in the building 10 can be reduced by about 50%. Moreover, if M / (M + n × Z) is about 0.3, the shaking generated in the building 10 can be reduced to about 30%. Further, if M / (M + n × Z) is about 0.1, the vibration generated in the building 10 can be reduced to about 10%.

For example, in the case of a 100 square meter (100 mm ² ) wooden house, the weight of the second floor portion is about 30 to 50 tons (ton = Mg = 1000 kg). Here, when the building vibration control device 100 is attached to the first floor of a wooden house, assuming that the weight M of the second floor portion is M, (M + n × Z) is less than 0.9 so that M / (M + n × Z) is less than 0.9. An apparatus 100 may be provided. In this case, if the mass effect Z of one building damping device 100 is small, it is necessary to attach many building damping devices 100 to the building 10. Further, in order to increase the mass effect Z of the building vibration control device 100, it is necessary to make the weight 63 used in the building vibration control device 100 heavy or to increase the diameter of the weight 63. In addition, it is necessary to structurally ensure the required strength of the rectangular frame 20 of the building 10 that receives the reaction force from the building vibration control device 100.

  From this point of view, the mass effect (inertial mass Z) of one building damping device 100 is, for example, about 0.1 Mg or more, preferably about 0.2 Mg or more, or one building damping device 100. The mass effect (inertial mass Z) is approximately 5.0 Mg or less, preferably approximately 3.0 Mg or less, and an appropriate number of building vibration control devices 100 may be attached to appropriate positions of the building 10. Here, if the mass effect (inertial mass Z) of one building damping device 100 is less than 0.1 Mg, the effect of reducing the shaking of the building may not be sufficiently exhibited. Further, if the mass effect (inertial mass Z) of one building damping device 100 is larger than 5.0 Mg, the mass effect is too great, and the building damping device 100 itself becomes large. For example, in a wooden house in Japan, for example, one building damping device 100 may be configured so that the mass effect (inertial mass Z) is about 0.1 Mg ≦ Z ≦ 5.0 Mg.

  The vibration control device for buildings should fit in the building wall. For this reason, the thickness of the vibration damping device for buildings is, for example, 120 mm or less, more preferably 110 mm or less, and further preferably 100 mm or less.

10 Building 11 Foundation (under beam)
12, 13 Pillar 14 2nd floor floor beam (upper beam)
15, 16 Hole-down hardware 20 Rectangular frame 20A Clearance 30 Concrete foundation 31, 32 Hole-down bolt 34 Foundation packing 40 Upper transmission member 41 Upper beam side fixing portion 42 First unit side fixing portion 43 Arm 45 Spring 50 Lower transmission member 51 Lower beam side fixing portion 52 Second unit side fixing portion 53 Arm 60 Damping unit 61 First rack gear 62 First pinion gear 62a Gear shaft (gear shaft of first pinion gear)
63 Weight 70 Pushing mechanism 71 Second rack gear 72 Second pinion gear 73 Support member 74 Roller 75 Guide 75a Guide hole 80 Speed increasing mechanism 81 Large diameter gear 82 Small diameter gear 82a Gear shaft 83 Chain 85 Arm 86 Idle sprocket 87 First chain 88 Second chain 89 Chain 100 Building damping device 101 Weight (ring-shaped weight)
102 Rotating shaft 103 Bar 111, 112 Mass body 113 Bar

Claims (15)

A vibration control device for a building, which is arranged in a rectangular frame surrounded by a lower beam of a building, a pair of columns standing on the lower beam, and an upper beam spanned between the pair of columns. And
An upper transmission member;
A lower transmission member;
With a vibration control unit,
The upper transmission member is
An upper beam side fixing portion fixed to the upper beam of the building;
A first unit side fixing portion fixed to the vibration suppression unit;
The lower transmission member is
A lower beam side fixing portion fixed to the lower beam of the building;
A second unit side fixing portion fixed to the vibration suppression unit,
The vibration control unit is
A first rack gear attached laterally to one of the first unit side fixing portion and the second unit side fixing portion;
A first pinion gear that is attached to the other fixed part of the first unit side fixed part and the second unit side fixed part and meshes with the first rack gear;
A weight engaged with the first pinion gear so as to rotate according to the rotation of the first pinion gear;
Building damping device.   The building vibration damping device according to claim 1, wherein the first rack gear is attached to be parallel to the upper beam. The first rack gear is attached to one of the first unit side fixing portion and the second unit side fixing portion by a pin link,
The building vibration control device according to claim 1, further comprising a pressing mechanism that presses the first pinion gear against the first rack gear. The pressing mechanism is
A second rack gear provided on the back side of the first rack gear;
A second pinion gear meshing with the second rack gear;
The second pinion gear and the second rack gear mesh with each other, and the first pinion gear and the second pinion gear sandwich the first rack gear and the second rack gear with respect to the first pinion gear. The building vibration control device according to claim 3, further comprising a support member that supports the second pinion gear. The pressing mechanism is
A roller that presses against the back surface of the first rack gear;
The building control according to claim 3, further comprising a support member that supports the roller with respect to the first pinion gear so that the roller and the first pinion gear sandwich the first rack gear. Shaker.   The pressing mechanism includes a guide for guiding the gear shaft of the first pinion gear with respect to the rack gear so that the distance of the gear shaft of the first pinion gear with respect to the first rack gear is constant. Item 3. The building damping device according to item 3.   The vibration control device for a building according to any one of claims 1 to 6, wherein the weight is attached to a gear shaft of the first pinion gear.   The building vibration damping device according to any one of claims 1 to 7, further comprising a speed increasing mechanism that speeds up the rotation of the weight with respect to the first pinion gear. The speed increasing mechanism includes a large-diameter gear that rotates according to the rotation of the first pinion gear;
A small-diameter gear having a smaller pitch circle diameter than the large-diameter gear and connected to the weight;
The building vibration damping device according to claim 8, comprising:   The building vibration control device according to claim 9, wherein each of the large diameter gear and the small diameter gear is a sprocket, and includes a chain that connects the large diameter gear and the small diameter gear. Two idle sprockets attached to an arm swingably attached to the gear shaft of the large-diameter gear;
A first chain connecting one of the two idle sprockets to a large-diameter gear;
The building vibration control device according to claim 10, further comprising a second chain that connects the other of the two idle sprockets to a small-diameter gear.   The building weight damping device according to any one of claims 1 to 11, wherein two weights are provided so as to face the front and back of the rectangular frame.   The building damping device according to any one of claims 1 to 12, wherein a mass of the weight is biased to a position away from a rotation axis of the weight.   The vibration damping device for buildings according to any one of claims 1 to 13, wherein the inertial mass Z is 0.1 Mg ≤ Z ≤ 5.0 Mg.   The building damping device according to any one of claims 1 to 14, wherein the building damping device has a thickness of 120 mm or less.

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