JP7203368B2 - ceiling damping system - Google Patents

Description

The present invention relates to a ceiling damping system.

In general, as an earthquake countermeasure for suspended ceilings, efforts are being made to make them earthquake-resistant. A brace is required (see Patent Document 1, for example).

JP 2015-081496 A

By the way, in the ``Explanation of Technical Standards for Countermeasures against Falling Ceilings in Buildings'' based on the above legal standards, ``According to the current technical knowledge, the properties of ceilings that are attached to the structural frame during a major earthquake cannot be clarified. Therefore, the technical standards are designed to prevent damage to the ceiling during rare seismic motions (moderate earthquakes) in which the properties of the ceiling can be assumed to some extent. The goal is to reduce the fall of the ceiling even in the event of a certain earthquake.”

As a result of diligent studies by the present inventors, even with the ceiling foundation structure of a specific ceiling that conforms to the above legal standards, when a certain earthquake exceeding a medium earthquake occurs, the acceleration response of the ceiling is amplified, and even after the earthquake We learned that there is a possibility that the ceiling may be damaged if the ceiling continues to shake.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a ceiling damping system capable of reducing the acceleration of the ceiling and attenuating the shaking of the ceiling at an early stage in the event of an earthquake, thereby suppressing damage to the ceiling. do.

A ceiling vibration damping system according to the present invention is a ceiling vibration damping system arranged between a suspension base and a ceiling suspended from the suspension base, wherein the ceiling vibration damping system is arranged to be inclined in opposite directions to suppress vibrations occurring in the ceiling. It comprises a damping first damper and a second damper, and a bundle extending vertically to suppress out-of-plane deformation of the ceiling due to expansion and contraction of the first damper and the second damper.

In the ceiling damping system according to the present invention, since the first damper and the second damper are arranged to tilt in opposite directions, when an earthquake occurs, the vibration of the ceiling is caused by the first damper and the second damper. Attenuated. As a result, when an earthquake occurs, it is possible to reduce the acceleration of the ceiling and attenuate the shaking of the ceiling at an early stage, thereby suppressing damage to the ceiling. Furthermore, since the bundle material extending in the vertical direction can suppress out-of-plane deformation of the ceiling due to expansion and contraction of the first damper and the second damper, it is possible to further suppress damage to the ceiling. Since the bundle material loads the seismic force in the compressive direction acting on the first damper and the second damper, the first damper and the second damper only need to exhibit at least the damping force in the tensile direction. It does not have to exhibit damping force.

The damping force in the compression direction of the first damper and the second damper may be smaller than the damping force in the tension direction. In this ceiling damping system, since the first damper and the second damper whose damping force in the compression direction is smaller than the damping force in the tension direction are used, when using dampers whose damping force in the compression direction and the damping force in the tension direction are equal Cost can be reduced compared to

The first damper has a first joint capable of adjusting the axial length of the first damper, and the second damper has a second joint capable of adjusting the axial length of the second damper. good too. In this ceiling damping system, by adjusting the axial length of the first damper and the second damper with the first joint and the second joint, the suspension length of the ceiling, the inclination angle of the first damper and the second damper The first damper and the second damper can be appropriately attached even when construction is performed at construction sites with different requirements.

The first damper and the second damper may be arranged in a V shape that expands upward. In this ceiling damping system, since the first damper and the second damper are arranged in a V shape that spreads upward, the shaking of the ceiling can be damped appropriately by the first damper and the second damper. .

The first damper and the second damper may be arranged in a V shape that widens downward. In this ceiling damping system, since the first damper and the second damper are arranged in a V shape that spreads downward, the shaking of the ceiling can be damped appropriately by the first damper and the second damper. .

The bundle has a first bundle and a second bundle that are separated from each other, the first damper is fixed with the first bundle, and the second damper is fixed with the second bundle. good too. In this ceiling damping system, the first damper and the first bundle of materials are assembled as one unit, and the second damper and the second bundle of materials are assembled as one unit, so that workability can be improved.

It may further include a first vibration amplifying mechanism that amplifies an amount of expansion and contraction of the first damper accompanying vibration of the ceiling, and a second vibration amplifying mechanism that amplifies an amount of expansion and contraction of the second damper accompanying vibration of the ceiling. In this ceiling damping system, since the first vibration amplifying mechanism and the second vibration amplifying mechanism amplify the expansion and contraction amounts of the first damper and the second damper, respectively, the damping efficiency of the first damper and the second damper can be improved. can be done.

ADVANTAGE OF THE INVENTION According to this invention, when an earthquake occurs, the acceleration of a ceiling can be reduced, the shaking of a ceiling can be damped early, and the damage of a ceiling can be suppressed.

It is a sectional view showing a ceiling damping system concerning a first embodiment. It is a sectional view showing a ceiling damping system concerning a second embodiment. It is a sectional view showing a ceiling damping system concerning a third embodiment. It is a cross-sectional view showing a ceiling damping system according to a fourth embodiment. It is a sectional view showing a ceiling damping system concerning a fifth embodiment. It is a cross-sectional view showing a ceiling damping system according to a sixth embodiment. FIG. 11 is a cross-sectional view showing a ceiling damping system according to a seventh embodiment; FIG. 20 is a cross-sectional view showing a ceiling damping system according to an eighth embodiment; 2 is a cross-sectional view showing a ceiling damping system of Comparative Example 1. FIG. FIG. 11 is a cross-sectional view showing a ceiling damping system of Comparative Example 2;

BEST MODE FOR CARRYING OUT THE INVENTION A ceiling damping system according to the present invention will be described in detail below with reference to the drawings. In all the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant explanations are omitted.

[First embodiment]
As shown in FIG. 1, the ceiling damping system 1 according to the first embodiment is arranged between a suspension base S and a ceiling C suspended from the suspension base S. As shown in FIG. The suspension base S is composed of a building skeleton, a beam, or the like. The ceiling C is suspended from a suspension base S by suspension bolts 5, and is also called a suspended ceiling. In the following description, the vertical direction of the ceiling damping system refers to the vertical direction when the system is arranged between the suspension base S and the ceiling C. As shown in FIG.

The ceiling C is mainly composed of a ceiling material 2 which is a ceiling surface material, and a joist 3 and a joist receiver 4 which are ceiling base materials.

The joist 3 is a member to which the ceiling material 2 is attached. The joist 3 is made of a metal material such as stainless steel or galvanized steel sheet and is elongated. The joist 3 is formed to have a substantially C-shaped cross section that opens upward. A ceiling damping system 1 includes a plurality of ceiling joists 3. A plurality of joists 3 are arranged parallel to each other and extend in the horizontal direction.

The ceiling joist receiver 4 is a member arranged on the opposite side of the joist 3 from the ceiling material 2 (upper side of the joist 3) and extending in a direction orthogonal to the joist 3. The ceiling joist receiver 4 is made of a metal material such as stainless steel or galvanized steel sheet and is elongated. The joist receiver 4 is formed to have a U-shaped cross section that is open to the side. A ceiling vibration damping system 1 includes a plurality of ceiling joist receivers 4. - 特許庁A plurality of joist receivers 4 are arranged parallel to each other and extend in a horizontal direction perpendicular to the joist receivers 4 .

The joist 3 and the joist receiver 4 are connected by a clip 11. - 特許庁The clip 11 is a metal fitting that connects the joist 3 and the joist receiver 4 at an intersection position where the joist 3 and the joist receiver 4 intersect. The clip 11 is made of a metal material such as stainless steel or galvanized steel.

The ceiling C may further include a reinforcing member disposed on the opposite side of the ceiling joist receiver 4 from the ceiling joist 3 (upper side of the ceiling joist receiver 4) and extending in a direction orthogonal to the ceiling joist receiver 4. In this case, the reinforcing member is connected to the joist receiver 4 by clips.

The suspension bolt 5 is a member fixed to the suspension base S to suspend the ceiling C. As shown in FIG. The hanging bolt 5 extends linearly in the vertical direction. A hanger 12 (hanger) for hooking the joist receiver 4 is attached to the lower end of the hanger bolt 5 .

In this embodiment, a plurality of suspension bolts 5 are suspended from suspension base S. As shown in FIG. The plurality of hanging bolts 5 include a first hanging bolt 5a, a second hanging bolt 5b, and a third hanging bolt 5c arranged between the first hanging bolt 5a and the second hanging bolt 5b. is The first suspension bolt 5a and the third suspension bolt 5c, and the second suspension bolt 5b and the third suspension bolt 5c are preferably suspension bolts 5 adjacent to each other. may be placed. In FIG. 1, the first suspension bolt 5a is the suspension bolt 5 adjacent to the left side of the third suspension bolt 5c, and the second suspension bolt 5b is the suspension bolt 5 adjacent to the right side of the third suspension bolt 5c. In addition, in the following description, the first suspension bolt 5a, the second suspension bolt 5b, and the third suspension bolt 5c are collectively described as the suspension bolt 5 except when they are specifically distinguished and described.

The ceiling damping system 1 has a first damper 6, a second damper 7, and a bundle 8 as main components.

The first damper 6 and the second damper 7 are members that damp vibrations that occur in the ceiling C. As shown in FIG. The first damper 6 and the second damper 7 are arranged so as to be inclined in opposite directions. More specifically, the first damper 6 and the second damper 7 are arranged to be inclined in opposite directions so as to form a V shape that expands upward. Various dampers such as an oil damper, a viscoelastic damper, a gas damper, a hysteresis damper, and a friction damper can be used as the dampers that constitute the first damper 6 and the second damper 7. It is preferable to use a free piston type gas spring damper.

The bundle 8 is a vertically extending member. The bundle material 8 suppresses out-of-plane deformation of the ceiling C due to expansion and contraction of the first damper 6 and the second damper 7 . More specifically, when a certain earthquake exceeding a medium earthquake occurs, the first damper 6 and the second damper 7 expand and contract. At this time, if there is no bundle material 8, the suspension bolt 5 is buckled, and the ceiling C is deformed in the out-of-plane direction so as to undulate. Therefore, by arranging the bundle 8 extending in the vertical direction between the suspension base S and the ceiling C, deformation of the ceiling C in the out-of-plane direction is suppressed. For this reason, the bundle 8 preferably has a buckling load greater than that of the hanging bolt 5 . The bundle material 8 is formed in a bar shape from a metal material such as stainless steel or galvanized steel sheet. The number of the bundles 8 is not particularly limited, but in this embodiment, the first bundle 8a arranged on the first suspension bolt 5a side of the third suspension bolt 5c and the second suspension bolt of the third suspension bolt 5c Two bundles 8 separated from each other are provided, a second bundle 8b arranged on the 5b side.

The first damper 6 is fixed to the first bundle 8a. More specifically, the first damper 6 is fixed to the first bundle of materials 8a via a first auxiliary metal fitting 9a. The first auxiliary metal fitting 9a is a member that fixes the first damper 6 and the first bundle 8a. A lower end portion of the first damper 6 and a lower end portion of the first bundle of materials 8a are fixed to the first auxiliary metal fitting 9a. The first damper 6 and the first bundle 8a are united by a first auxiliary metal fitting 9a to form a V-shaped first assembly 10a. The first damper 6 is fixed to the first auxiliary metal fitting 9a so as not to swing, and the first bundle 8a is fixed to the first auxiliary metal fitting 9a so as to be able to swing. Therefore, it is possible to change the inclination angle of the first damper 6 with respect to the first bundle of materials 8a. Here, "to be fixed so as not to swing" means, for example, that the members are fastened with a plurality of screws and that the two members cannot relatively swing even if the screws are loosened. To be fixed so as to be able to swing means, for example, that the two members are fastened with one bolt, and that the two members can be relatively swung by loosening the bolt.

The second damper 7 is fixed to the second bundle 8b. More specifically, the second damper 7 is fixed to the second bundle 8b via a second auxiliary metal fitting 9b. The second auxiliary metal fitting 9b is a member that fixes the second damper 7 and the second bundle 8b. A lower end portion of the second damper 7 and a lower end portion of the second bundle of materials 8b are fixed to the second auxiliary metal fitting 9b. The second damper 7 and the second bundle 8b are united by a second auxiliary metal fitting 9b to form a V-shaped second assembly 10b. The second damper 7 is non-pivotally fixed to the second auxiliary metal fitting 9b, and the second bundle 8b is fixed to the second auxiliary metal fitting 9b so as to be able to swing. Therefore, it is possible to change the inclination angle of the second damper 7 with respect to the second bundle of materials 8b.

The first assembly 10a and the second assembly 10b are arranged between the suspension base S and the ceiling C so that the first damper 6 and the second damper 7 are arranged in a V shape that spreads upward. are placed in

More specifically, the first auxiliary metal fitting 9a is fixed to a lower fixing metal fitting 13 fixed to the ceiling joist receiver 4 in the vicinity of the third suspension bolt 5c, and the upper end of the first damper 6 is connected to the first suspension bolt 5a, and the upper end of the first bundle 8a is fixed to a third upper fixing metal fitting 14c fixed to the third hanging bolt 5c. Further, the second auxiliary metal fitting 9b is fixed to the lower fixing metal fitting 13 fixed to the joist receiver 4 in the vicinity of the third suspension bolt 5c, and the upper end of the second damper 7 is attached to the second suspension bolt 5b. It is fixed to the fixed second upper fixing metal fitting 14b, and the upper end of the second bundle of materials 8b is fixed to the third upper fixing metal fitting 14c fixed to the third suspension bolt 5c. That is, both the first auxiliary metal fitting 9a and the second auxiliary metal fitting 9b are fixed to the same lower fixing metal fitting 13, and the upper end of the first bundle of materials 8a and the upper end of the second bundle of materials 8b are both connected to the same third It is fixed to the upper fixing bracket 14c.

For this reason, the lower end of the first damper 6 is fixed to the joist holder 4 of the ceiling C via the first auxiliary metal fitting 9a and the lower fixing metal fitting 13, and the upper end of the first damper 6 is It is fixed to the hanger S via the upper fixing bracket 14a and the first hanger bolt 5a. Further, the lower end of the second damper 7 is fixed to the joist holder 4 of the ceiling C via the second auxiliary metal fitting 9b and the lower fixing metal fitting 13, and the upper end of the second damper 7 is connected to the second upper part. It is fixed to the hanger S via the fixing bracket 14b and the second hanger bolt 5b. Further, the lower end of the first bundle 8a is fixed to the joist receiver 4 of the ceiling C via the first auxiliary metal fitting 9a and the lower fixing metal fitting 13, and the upper end of the first bundle 8a is It is fixed to the hanger S via the third upper fixing bracket 14c and the third hanger bolt 5c. In addition, the lower end of the second bundle 8b is fixed to the joist holder 4 of the ceiling C via the second auxiliary metal fitting 9b and the lower fixing metal fitting 13, and the upper end of the second bundle 8b is It is fixed to the hanger S via the third upper fixing bracket 14c and the third hanger bolt 5c.

By the way, although the first damper 6 and the second damper 7 are extended, their minimum and maximum length ranges are restricted. Therefore, if the suspension length of the ceiling C by the suspension bolts 5, the interval between the suspension bolts 5, the inclination angles of the first damper 6 and the second damper 7, etc. are changed, the first damper 6 and the second damper 7 are fixed by the lower fixing bracket. 13 and the first upper fixing bracket 14a and the second upper fixing bracket 14b. Therefore, the first damper 6 has a first joint 6a capable of adjusting the axial length of the first damper 6, and the second damper 7 adjusts the axial length of the second damper 7. It has a possible second joint 7a. The first joint 6a and the second joint 7a have, for example, a nested structure that allows the inner cylinder to expand and contract with respect to the outer cylinder, and the position of the inner cylinder relative to the outer cylinder is adjusted by a fixing member such as a bolt. It can be of a fixed structure.

Next, a construction method of the ceiling damping system 1 according to this embodiment will be described.

The construction method of the ceiling damping system 1 according to this embodiment is a method of constructing the ceiling damping system 1 between the suspension base S and the ceiling C. As shown in FIG. In this method, first, the lower end of the first damper 6 and the lower end of the first bundle of materials 8a are fixed to the first auxiliary fitting 9a, and the first damper 6 and the first bundle of materials 8a are V-shaped first V-shaped first. Assemble to the assembly 10a. Further, the lower end of the second damper 7 and the lower end of the second bundle of materials 8b are fixed to the second auxiliary fitting 9b, and the second damper 7 and the second bundle of materials 8b are attached to the V-shaped second assembly 10b. assemble.

Next, the first auxiliary metal fitting 9a is fixed to the lower fixing metal fitting 13 fixed to the joist receiver 4 in the vicinity of the third hanging bolt 5c, and the third upper fixing metal fitting 14c fixed to the third hanging bolt 5c The upper end portion of the bundle of materials 8a is fixed, and the upper end portion of the first damper 6 is fixed to the first upper fixing metal fitting 14a fixed to the first suspension bolt 5a. At this time, by adjusting the inclination angle of the first damper 6 with respect to the first bundle of materials 8a and adjusting the length of the first damper 6 with the first joint 6a, the position of the first upper fixture 14a and the first Align with the upper end of the damper 6 .

In the vicinity of the third hanging bolt 5c, the second auxiliary metal fitting 9b is fixed to the lower fixing metal fitting 13 fixed to the joist receiver 4, and the second auxiliary metal fitting 9b is fixed to the third upper fixing metal fitting 14c fixed to the third hanging bolt 5c. The upper end of the bundle 8b is fixed, and the upper end of the second damper 7 is fixed to the second upper fixing metal fitting 14b fixed to the second hanging bolt 5b. At this time, by adjusting the inclination angle of the second damper 7 with respect to the second bundle 8b and adjusting the length of the second damper 7 with the second joint 6b, the position of the second upper fixture 14b and the second Align with the upper end of the damper 7 .

This completes the construction of the ceiling damping system 1 . Note that the order of construction described above can be changed as appropriate.

Here, a comparative example of this embodiment will be described with reference to FIGS. 9 and 10. FIG.

As shown in FIG. 9, the ceiling damping system 110 of Comparative Example 1 is basically the same as the ceiling damping system 1 of the first embodiment, but the first damper 6, the second damper 7 and the bundle material The only difference from the ceiling damping system 1 of the first embodiment is that the first brace 111 and the second brace 112 are provided instead of the braces 8 .

The first brace 111 and the second brace 112 are members for preventing the ceiling C from swinging, and are arranged so as to be inclined in opposite directions so as to form a V shape that expands upward. The lower ends of the first brace 111 and the second brace 112 are fixed to the lower fixing metal fittings 13 fixed to the joist receivers 4 . The upper end of the first brace 111 is fixed to the first upper fixture 14a fixed to the first suspension bolt 5a. The upper end of the second brace 112 is fixed to the second upper fixing metal fitting 14b fixed to the second suspension bolt 5b.

The ceiling damping system 110 of Comparative Example 1 configured in this way does not include a configuration that dampens the shaking of the ceiling C. Therefore, when an earthquake occurs, the acceleration response of the ceiling C is amplified. There is a possibility that the ceiling C will be damaged as the shaking of the ceiling C continues.

As shown in FIG. 10, the ceiling damping system 120 of Comparative Example 2 is basically the same as the ceiling damping system 1 of the first embodiment, except that the bundle material 8 is not provided. It differs from the ceiling damping system 1 of the embodiment.

Since the ceiling damping system 120 of Comparative Example 2 configured in this way does not have a configuration for stopping the vertical shaking of the ceiling C, even if a small earthquake occurs, the first damper 6 and the second damper 7 Since the ceiling C deforms in the out-of-plane direction due to expansion and contraction, the ceiling C may be damaged.

On the other hand, in the ceiling damping system 1 according to the present embodiment, the first damper 6 and the second damper 7 are arranged so as to incline in opposite directions. is damped by the first damper 6 and the second damper 7 . As a result, when an earthquake occurs, the acceleration of the ceiling C can be reduced and the shaking of the ceiling C can be damped early, so that damage to the ceiling C can be suppressed. Furthermore, since the bundle material 8 extending in the vertical direction can suppress out-of-plane deformation of the ceiling C due to expansion and contraction of the first damper 6 and the second damper 7, damage to the ceiling C can be further suppressed.

By the way, since the bundle material 8 loads the seismic force in the compression direction acting on the first damper 6 and the second damper 7, the first damper 6 and the second damper 7 should exhibit at least the damping force in the tensile direction. Well, it is not necessary to exhibit the damping force in the compression direction. Therefore, the first damper 6 and the second damper 7 may be dampers in which the damping force in the compression direction is smaller than the damping force in the tension direction, or may be dampers that exhibit damping force only in the tension direction. . When dampers whose damping force in the compression direction is smaller than the damping force in the tension direction are used as the first damper 6 and the second damper 7, compared to the case of using dampers whose damping force in the compression direction and the damping force in the tension direction are equal cost can be reduced. When dampers that exert damping force only in the tensile direction are used as the first damper 6 and the second damper 7, compared to the case of using dampers that exert both the damping force in the compressive direction and the damping force in the tensile direction , the cost can be reduced.

By the way, since the ceiling material 2 is extremely lightweight with respect to the suspension base S, the vibration of the ceiling material 2 with respect to the suspension base S can be damped even with a small damping force. Therefore, the first damper 6 and the second damper 7 may be free piston type gas spring dampers. When free-piston type gas spring dampers are used as the first damper 6 and the second damper 7, necessary and sufficient damping performance can be exhibited while reducing the cost and weight.

In addition, by adjusting the axial length of the first damper 6 and the second damper 7 with the first joint 6a and the second joint 7a, the hanging length of the ceiling C, the interval between the hanging bolts 5, the first damper 6 Also, the first damper 6 and the second damper 7 can be appropriately attached even when construction is performed at a construction site where the inclination angle of the second damper 7 and the like are different.

In addition, since the first damper 6 and the second damper 7 are arranged in a V shape that spreads upward, the shaking of the ceiling C can be appropriately damped by the first damper 6 and the second damper 7. .

Further, since the first damper 6 and the first bundle 8a are assembled as one unit, and the second damper and the second bundle 8b are assembled as one unit, workability can be improved.

[Second embodiment]
Next, a second embodiment will be described. The second embodiment is basically the same as the first embodiment (see FIG. 1), and differs from the first embodiment only in the configuration of the bundle. Therefore, only the matters different from the first embodiment will be explained below, and the explanation of the same matters as the first embodiment will be omitted.

As shown in FIG. 2, the ceiling damping system 1A according to the present embodiment includes a first damper 6, a second damper 7, a bundle 21, and a support member 22 as main components.

The bundle material 21 is formed in a cylindrical shape (tubular shape), and the suspension bolt 5 can be inserted into the inner peripheral side thereof. The cylindrical shape of the bundle 21 is preferably cylindrical (cylindrical) from the viewpoint of ease of manufacture.

The support member 22 is a member that is attached to the third suspension bolt 5c so that the position of the third suspension bolt 5c in the axial direction can be adjusted. The support member 22 includes, for example, a dish-shaped member that can move vertically along the third suspension bolt 5c by inserting the third suspension bolt 5c, and a dish-shaped member that is screwed into the third suspension bolt 5c. and a nut that supports from below. The dish-shaped member is a dish-shaped member that supports the bundle 21 from below. Therefore, in the support member 22, the dish-shaped member can be moved vertically by rotating the nut.

The bundle 21 is sandwiched between the support member 22 and the suspension base S with the first suspension bolt 5 a inserted into the bundle 21 . That is, the bundle 21 is sandwiched between the support member 22 and the suspension base S by rotating the nut of the support member 22 to move the dish-shaped member upward.

Next, a construction method of the ceiling damping system 1A according to this embodiment will be described.

First, the third suspension bolt 5c is inserted into the bundle 21, and the bundle 21 is sandwiched between the support member 22 and the suspension base S. As shown in FIG. The third suspension bolt 5c is inserted into the bundle 21 before suspending the ceiling C with the third suspension bolt 5c.

Next, the lower end of the first damper 6 is fixed to the first auxiliary metal fitting 9a, and the lower end of the second damper 7 is fixed to the second auxiliary metal fitting 9b.

Next, in the vicinity of the third hanging bolt 5c, the first auxiliary metal fitting 9a is swingably fixed to the lower fixing metal fitting 13 fixed to the joist receiver 4, and the first upper fixing fixed to the first hanging bolt 5a The upper end of the first damper 6 is fixed to the metal fitting 14a. At this time, by adjusting the inclination angle of the first auxiliary metal fitting 9a with respect to the lower fixing metal fitting 13 and adjusting the length of the first damper 6 by the first joint 6a, the position of the first upper fixing metal fitting 14a and the first Align with the upper end of the damper 6 .

In the vicinity of the third hanging bolt 5c, the second auxiliary metal fitting 9b is swingably fixed to the lower fixing metal fitting 13 fixed to the joist receiver 4, and the second upper fixing metal fitting fixed to the second hanging bolt 5b The upper end of the second damper 7 is fixed to 14b. At this time, by adjusting the inclination angle of the second auxiliary metal fitting 9b with respect to the lower fixing metal fitting 13 and adjusting the length of the second damper 7 with the second joint 6b, the position of the second upper fixing metal fitting 14b and the second Align with the upper end of the damper 7 .

This completes the construction of the ceiling damping system 1A. Note that the order of construction described above can be changed as appropriate.

Thus, in the ceiling vibration damping system 1A according to the present embodiment, in a state where the third suspension bolt 5c is inserted into the bundle 21, the position of the third suspension bolt 5c in the axial direction can be adjusted. Since the bundle material is sandwiched between the suspension base S, the bundle material 21 can be easily arranged.

[Third Embodiment]
Next, a third embodiment will be described. The third embodiment is basically the same as the first embodiment (see FIG. 1), except that the arrangement of the first damper and the second damper is different, and the first vibration amplification mechanism and the second vibration amplification mechanism are further modified. Only the point of provision is different from the first embodiment. Therefore, only the matters different from the first embodiment will be explained below, and the explanation of the same matters as the first embodiment will be omitted.

As shown in FIG. 3, the ceiling damping system 1B according to the present embodiment includes a first damper 31, a second damper 32, a bundle 8, a first vibration amplifying mechanism 33, and a second vibration amplifying mechanism 34. and are the main components.

The first damper 31 and the second damper 32 are arranged to be inclined in opposite directions so as to form an inverted V shape that widens downward. As dampers constituting the first damper 31 and the second damper 32, the same dampers as the first damper 6 and the second damper 7 of the first embodiment can be used.

Upper ends of the first damper 31 and the second damper 32 are fixed to a third upper fixing metal fitting 14c fixed to the third suspension bolt 5c. A lower end portion of the first damper 31 is connected to the first vibration amplifying mechanism 33 . A lower end portion of the second damper 32 is connected to a second vibration amplifying mechanism 34 .

The first vibration amplifying mechanism 33 is a mechanism for amplifying the amount of expansion and contraction of the first damper 31 accompanying vibration of the ceiling C, and is also called a toggle mechanism. The first vibration amplifying mechanism 33 includes a lower fixing bracket 13 fixed to the ceiling joist receiver 4, a first brace 33a fixed swingably to the lower end of the first damper 31, and a lower end of the first damper 31. and a second brace 33b that is pivotably fixed to the first upper fixing bracket 14a. The connection between the first brace 33a and the lower fixing metal fitting 13, the connection between the first brace 33a and the first damper 31, the connection between the second brace 33b and the lower fixing metal fitting 13, the connection between the second brace 33b and the first damper 31 The connection, the connection between the first brace 33a and the second brace 33b, can be performed by, for example, rotational support (pin support). The first brace 33a and the second brace 33b are connected so as to bend toward the first damper 31 side.

The second vibration amplifying mechanism 34 is a mechanism that amplifies the amount of expansion and contraction of the second damper 32 accompanying vibration of the ceiling C, and is also called a toggle mechanism. The second vibration amplifying mechanism 34 includes a first brace 34a that is pivotably fixed to the lower fixing bracket 13 and the lower end of the second damper 32, a lower end of the second damper 32 and the second upper fixing bracket 14b. and a second brace 34b pivotably fixed to. Connection between the first brace 34a and the lower fixing bracket 13, connection between the first brace 34a and the second damper 32, connection between the second brace 34b and the lower fixing bracket 13, connection between the second brace 34b and the second damper 32 The connection, the connection between the first brace 34a and the second brace 34b, can be performed by, for example, rotational support (pin support). The first brace 34a and the second brace 34b are connected so as to bend toward the second damper 32 side.

Next, a construction method of the ceiling damping system 1B according to this embodiment will be described.

First, the upper end of the first bundle of materials 8a is fixed to the third upper fixing metal fitting 14c fixed to the third suspension bolt 5c, and the lower end of the first bundle of materials 8a is placed in the vicinity of the third suspension bolt 5c. It is fixed to the lower fixing metal fitting 13 fixed to the joist receiver 4. - 特許庁In addition, the upper end of the second bundle of materials 8b is fixed to the third upper fixing metal fitting 14c fixed to the third suspension bolt 5c, and the lower end of the second bundle of materials 8b is placed in the vicinity of the third suspension bolt 5c. It is fixed to the lower fixing metal fitting 13 fixed to the joist receiver 4. - 特許庁

Next, the lower end of the first brace 33a is pivotally connected to the lower fixing metal fitting 13 fixed to the ceiling joist receiver 4 in the vicinity of the third hanging bolt 5c, and the upper end of the second brace 33b is connected to the third It is swingably connected to the first upper fixing metal fitting 14a fixed to the suspension bolt 5a, and the upper end of the first brace 33a and the lower end of the second brace 33b are swingably connected. In addition, the lower end of the first brace 34a is pivotally connected to the lower fixing metal fitting 13 fixed to the joist receiver 4 in the vicinity of the third suspension bolt 5c, and the upper end of the second brace 34b is connected to the second It is swingably connected to the second upper fixing metal fitting 14b fixed to the suspension bolt 5b, and swingably connects the upper end portion of the first brace 34a and the lower end portion of the second brace 34b.

Next, the upper end of the first damper 31 is fixed to the third upper fixing metal fitting 14c fixed to the third suspension bolt 5c, and the lower end of the first damper 31 is connected to the upper end of the first brace 33a and the third brace 33a. It is swingably connected to the connecting portion with the lower end of the second brace 33b. The upper end of the second damper 32 is fixed to the third upper fixing metal fitting 14c fixed to the third suspension bolt 5c, and the lower end of the second damper 32 is connected to the upper end of the first brace 34a and the second brace 34a. It is pivotably connected to the connecting portion with the lower end portion of the brace 34b.

This completes the construction of the ceiling damping system 1B. Note that the order of construction described above can be changed as appropriate.

As described above, in the ceiling vibration damping system 1B according to the present embodiment, when the ceiling C shakes in the event of an earthquake, the first vibration amplification mechanism 33 is caused to bend the first brace 33a and the second brace 33b to cause the first vibration to vibrate. The expansion/contraction amount of the damper 31 is amplified, and the second vibration amplifying mechanism 34 amplifies the expansion/contraction amount of the second damper 32 by bending the first brace 34a and the second brace 34b. Thereby, the damping efficiency of the first damper 31 and the second damper 32 can be improved.

[Fourth embodiment]
Next, a fourth embodiment will be described. The fourth embodiment is basically the same as the first embodiment (see FIG. 1), except that the first assembly (first bundle) and the second assembly (second bundle) are separated. Only is different from the first embodiment. Therefore, only the matters different from the first embodiment will be explained below, and the explanation of the same matters as the first embodiment will be omitted.

As shown in FIG. 4, the ceiling damping system 1C according to the present embodiment includes a first damper 6, a second damper 7, and a bundle 8 as main components.

In addition to the first suspension bolt 5a, the second suspension bolt 5b, and the third suspension bolt 5c, the plurality of suspension bolts 5 suspended from the suspension base S include the third suspension bolt 5c of the first suspension bolt 5a. A fourth suspension bolt 5d arranged on the opposite side of the second suspension bolt 5b and a fifth suspension bolt 5e arranged on the opposite side of the second suspension bolt 5c from the third suspension bolt 5c. The first suspension bolt 5a and the fourth suspension bolt 5d, and the second suspension bolt 5b and the fifth suspension bolt 5e are preferably suspension bolts 5 adjacent to each other. may be placed. In FIG. 4, the fourth suspension bolt 5d is the suspension bolt 5 adjacent to the left side of the first suspension bolt 5a, and the fifth suspension bolt 5e is the suspension bolt 5 adjacent to the right side of the second suspension bolt 5b.

As in the first embodiment, the first damper 6 and the first bundle 8a are united by a first auxiliary metal fitting 9a and assembled as a V-shaped first assembly 10a. 7 and the second bundle 8b are combined into one unit by a second auxiliary metal fitting 9b and assembled as a V-shaped second assembly 10b. However, in the fourth embodiment, the first assembly 10a and the second assembly 10b are arranged at positions separated from each other, and the first damper 6 and the second damper 7 form a V shape that spreads upward. are arranged as

More specifically, the first auxiliary metal fitting 9a is fixed to the first lower fixing metal fitting 13a fixed to the joist receiver 4 in the vicinity of the first suspension bolt 5a, and the upper end of the first damper 6 is attached to the second It is fixed to the fourth upper fixing metal fitting 14d fixed to the four hanging bolts 5d, and the upper end of the first bundle 8a is fixed to the first upper fixing metal fitting 14a fixed to the first hanging bolt 5a. . Further, the second auxiliary metal fitting 9b is fixed to the second lower fixing metal fitting 13b fixed to the joist receiver 4 in the vicinity of the second suspension bolt 5b, and the upper end of the second damper 7 is connected to the fifth suspension bolt 5e, and the upper end of the second bundle 8b is fixed to the second upper fixing metal fitting 14b fixed to the second suspension bolt 5b. That is, the first auxiliary metal fitting 9a and the second auxiliary metal fitting 9b are fixed to the first lower fixing metal fitting 13a and the second lower fixing metal fitting 13b which are different from each other, and the upper end portion of the first bundle of materials 8a and the second bundle. The upper end of the material 8b is fixed to a first upper fixing metal fitting 14a and a second upper fixing metal fitting 14b which are different from each other.

Therefore, the first assembly 10a (first bundle 8a) and the second assembly 10b (second bundle 8b) are arranged at positions separated from each other. The lower end of the first damper 6 is fixed to the joist receiver 4 of the ceiling C via the first auxiliary metal fitting 9a and the first lower fixing metal fitting 13a, and the upper end of the first damper 6 is It is fixed to the hanger S via the fourth upper fixing bracket 14d and the fourth hanger bolt 5d. Further, the lower end of the second damper 7 is fixed to the joist receiver 4 of the ceiling C via the second auxiliary metal fitting 9b and the second lower fixing metal fitting 13b, and the upper end of the second damper 7 is It is fixed to the hanger S via the fifth upper fixture 14e and the fifth hanger bolt 5e. Further, the lower end of the first bundle 8a is fixed to the joist receiver 4 of the ceiling C via the first auxiliary metal fitting 9a and the first lower fixing metal fitting 13a, and the upper end of the first bundle 8a. is fixed to the hanger S via the first upper fixing bracket 14a and the first hanger bolt 5a. In addition, the lower end of the second bundle 8b is fixed to the joist holder 4 of the ceiling C via the second auxiliary metal fitting 9b and the second lower fixing metal fitting 13b, and the upper end of the second bundle 8b is , the second upper fixing bracket 14b and the second suspension bolt 5b.

Thus, in the ceiling damping system 1C according to the present embodiment, the first assembly 10a and the second assembly 10b are arranged at positions separated from each other, but the first damper 6 and the second damper 7 , are arranged to be inclined in opposite directions to attenuate the vibration generated in the ceiling C, and the bundle material 8 extends in the vertical direction to absorb the out-of-plane deformation of the ceiling C due to the expansion and contraction of the first damper 6 and the second damper 7. suppress. Therefore, as in the first embodiment, when an earthquake occurs, the acceleration of the ceiling C can be reduced and the shaking of the ceiling C can be damped early, thereby suppressing damage to the ceiling C.

[Fifth embodiment]
Next, a fifth embodiment will be described. The fifth embodiment is basically the same as the first embodiment (see FIG. 1), except that the first assembly and the second assembly are arranged in opposite directions. differ. Therefore, only the matters different from the first embodiment will be explained below, and the explanation of the same matters as the first embodiment will be omitted.

As shown in FIG. 5, the ceiling damping system 1D according to the present embodiment includes a first damper 6, a second damper 7, and a bundle 8 as main components.

As in the first embodiment, the first damper 6 and the first bundle 8a are united by a first auxiliary metal fitting 9a to form a V-shaped first assembly 10a. The damper 7 and the second bundle 8b are united by a second auxiliary metal fitting 9b and assembled as a V-shaped second assembly 10b. However, in the fifth embodiment, the first assembly 10a and the second assembly 10b are arranged in the left-right reversed direction with respect to the first embodiment, and the first damper 6 and the second damper 7 are directed downward. are arranged in a V-shape that spreads out.

More specifically, the first auxiliary metal fitting 9a is fixed to the first lower fixing metal fitting 13a fixed to the joist receiver 4 in the vicinity of the first suspension bolt 5a, and the upper end of the first damper 6 is attached to the second It is fixed to the third upper fixing metal fitting 14c fixed to the three hanging bolts 5c, and the upper end of the first bundle 8a is fixed to the first upper fixing metal fitting 14a fixed to the first hanging bolt 5a. . Further, the second auxiliary metal fitting 9b is fixed to the second lower fixing metal fitting 13b fixed to the joist receiver 4 in the vicinity of the second suspension bolt 5b, and the upper end of the second damper 7 is connected to the third suspension bolt It is fixed to a third upper fixing metal fitting 14c fixed to 5c, and the upper end of the second bundle 8b is fixed to a second upper fixing metal fitting 14b fixed to the second suspension bolt 5b.

As described above, in the ceiling damping system 1D according to the present embodiment, the first assembly 10a and the second assembly 10b are arranged to be left-right reversed with respect to the first embodiment, but the first damper 6 and the second damper 7 are arranged to incline in opposite directions to attenuate the vibration generated in the ceiling C, and the bundle material 8 extends in the vertical direction to dampen the ceiling vibration caused by the expansion and contraction of the first damper 6 and the second damper 7 . Suppress out-of-plane deformation of C. Therefore, as in the first embodiment, when an earthquake occurs, the acceleration of the ceiling C can be reduced and the shaking of the ceiling C can be damped early, thereby suppressing damage to the ceiling C.

[Sixth embodiment]
Next, a sixth embodiment will be described. The sixth embodiment is basically the same as the fourth embodiment (see FIG. 4), except that the first assembly and the second assembly are arranged in opposite directions. differ. Therefore, hereinafter, only the matters different from the fourth embodiment will be described, and the description of the same matters as the fourth embodiment will be omitted.

As shown in FIG. 6, the ceiling damping system 1E according to the present embodiment has a first damper 6, a second damper 7, and a bundle 8 as main components.

As in the fourth embodiment, the first damper 6 and the first bundle 8a are united by a first auxiliary metal fitting 9a to form a V-shaped first assembly 10a. The damper 7 and the second bundle 8b are united by a second auxiliary metal fitting 9b and assembled as a V-shaped second assembly 10b. However, in the sixth embodiment, the first assembly 10a and the second assembly 10b are arranged in opposite directions to the fourth embodiment, with the first damper 6 and the second damper 7 facing downward. are arranged in a V-shape that spreads out.

More specifically, the first auxiliary metal fitting 9a is fixed to the fourth lower fixing metal fitting 13d fixed to the ceiling joist receiver 4 in the vicinity of the fourth hanging bolt 5d, and the upper end of the first damper 6 is attached to the first It is fixed to the first upper fixing metal fitting 14a fixed to the hanging bolt 5a, and the upper end of the first bundle 8a is fixed to the fourth upper fixing metal fitting 14d fixed to the fourth hanging bolt 5d. The second auxiliary metal fitting 9b is fixed to the fifth lower fixing metal fitting 13e fixed to the ceiling joist receiver 4 in the vicinity of the fifth hanging bolt 5e, and the upper end of the second damper 7 is connected to the second hanging bolt 5e. 5b, and the upper end of the second bundle 8b is fixed to a fifth upper fixing metal fitting 14e fixed to the fifth suspension bolt 5e.

As described above, in the ceiling damping system 1E according to the present embodiment, the first assembly 10a and the second assembly 10b are arranged in the opposite left and right direction with respect to the fourth embodiment, but the first damper 6 and the second damper 7 are arranged to incline in opposite directions to attenuate the vibration generated in the ceiling C, and the bundle material 8 extends in the vertical direction to dampen the ceiling vibration caused by the expansion and contraction of the first damper 6 and the second damper 7 . Suppress out-of-plane deformation of C. Therefore, as in the fourth embodiment, when an earthquake occurs, the acceleration of the ceiling C can be reduced and the shaking of the ceiling C can be damped early, thereby suppressing damage to the ceiling C.

[Seventh Embodiment]
Next, a seventh embodiment will be described. The seventh embodiment is basically the same as the fifth embodiment (see FIG. 5), and differs from the fifth embodiment only in that the ceiling damping system is not fixed to the suspension bolts. Therefore, only the matters different from the fifth embodiment will be explained below, and the explanation of the same matters as the fifth embodiment will be omitted.

As shown in FIG. 7, the ceiling damping system 1F according to the present embodiment includes a first damper 6, a second damper 7, and a bundle 8 as main components.

As in the fifth embodiment, the first damper 6 and the first bundle 8a are united by a first auxiliary metal fitting 9a to form a V-shaped first assembly 10a. The damper 7 and the second bundle 8b are united by a second auxiliary metal fitting 9b and assembled as a V-shaped second assembly 10b. However, in the seventh embodiment, the first assembly 10a and the second assembly 10b are fixed to the suspension base S and the ceiling C at positions away from the hanging bolts. In the first assembly 10a, the first damper 6 is arranged on the second assembly 10b side, and in the second assembly 10b, the second damper 7 is arranged on the first assembly 10a side. The first assembly 10a and the second assembly 10b are arranged so that the first damper 6 and the second damper 7 form a V shape that spreads upward.

More specifically, the first auxiliary metal fitting 9a is fixed to the sixth lower fixing metal fitting 13f fixed to the ceiling joist receiver 4 at a position away from the suspension bolt 5, and the upper end of the first damper 6 is attached to the suspension bolt 5, and the upper end of the first bundle 8a is fixed to the suspension base S at a position away from the suspension bolt 5. It is fixed to the second suspension fixture 17b. In addition, the second auxiliary metal fitting 9b is fixed to the seventh lower fixing metal fitting 13g fixed to the ceiling joist receiver 4 at a position away from the suspension bolt 5, and the upper end of the second damper 7 is located from the suspension bolt 5. It is fixed to the first suspension fixture 17a fixed to the suspension base S at a distant position, and the upper end of the second bundle 8b is fixed to the suspension base S at a position distant from the suspension bolt 5. It is fixed to the three-hanging base fixing metal fitting 17c. The upper end of the first damper 6 and the upper end of the second damper 7 are both fixed to the same first suspender fixture 17a, so that the first assembly 10a and the second assembly 10b are placed next to each other.

As described above, in the ceiling damping system 1D according to the present embodiment, the first assembly 10a and the second assembly 10b are arranged in the opposite left and right direction with respect to the fifth embodiment, but the first damper 6 and the second damper 7 are arranged to incline in opposite directions to attenuate the vibration generated in the ceiling C, and the bundle material 8 extends in the vertical direction to dampen the ceiling vibration caused by the expansion and contraction of the first damper 6 and the second damper 7 . Suppress out-of-plane deformation of C. Therefore, as in the fifth embodiment, when an earthquake occurs, the acceleration of the ceiling C can be reduced and the shaking of the ceiling C can be damped early, thereby suppressing damage to the ceiling C.

[Eighth Embodiment]
Next, an eighth embodiment will be described. The eighth embodiment is basically the same as the seventh embodiment (see FIG. 7), except that the first assembly (first bundle) and the second assembly (second bundle) are separated. Only is different from the seventh embodiment. Therefore, only the matters different from the seventh embodiment will be explained below, and the explanation of the same matters as the seventh embodiment will be omitted.

As shown in FIG. 8, the ceiling damping system 1G according to the present embodiment includes a first damper 6, a second damper 7, and a bundle 8 as main components.

As in the seventh embodiment, the first damper 6 and the first bundle 8a are united by a first auxiliary metal fitting 9a to form a V-shaped first assembly 10a. The damper 7 and the second bundle 8b are united by a second auxiliary metal fitting 9b and assembled as a V-shaped second assembly 10b. However, in the eighth embodiment, the first assembly 10a and the second assembly 10b are arranged at positions separated from each other, and the first damper 6 and the second damper 7 form a V shape that spreads downward. are arranged as

More specifically, the first auxiliary metal fitting 9a is fixed to the eighth lower fixing metal fitting 13h fixed to the ceiling joist receiver 4 at a position away from the suspension bolt 5, and the upper end of the first damper 6 is attached to the suspension bolt. The upper end of the first bundle 8a is fixed to the suspension base S at a position away from the suspension bolt 5. It is fixed to the fifth hanger fixing metal fitting 17e. In addition, the second auxiliary metal fitting 9b is fixed to the ninth lower fixing metal fitting 13i fixed to the joist receiver 4 at a position away from the suspension bolt 5, and the upper end of the second damper 7 is attached to the suspension bolt 5 and It is fixed to the sixth suspension fixing metal fitting 17f fixed to the suspension S at a position away from the fourth suspension fixing metal fitting 17d. It is fixed to the seventh suspension fixing metal fitting 17g fixed to the suspension S. The upper end portion of the first damper 6 and the upper end portion of the second damper 7 are fixed to the fourth suspension fixing metal fitting 17d and the sixth suspension fixing metal fitting 17f, which are different from each other, so that the first assembly 10a and the second assembly 10b are spaced apart.

Thus, in the ceiling damping system 1G according to the present embodiment, the first assembly 10a and the second assembly 10b are arranged at positions separated from each other, but the first damper 6 and the second damper 7 , are arranged to be inclined in opposite directions to attenuate the vibration generated in the ceiling C, and the bundle material 8 extends in the vertical direction to absorb the out-of-plane deformation of the ceiling C due to the expansion and contraction of the first damper 6 and the second damper 7. suppress. Therefore, as in the seventh embodiment, when an earthquake occurs, the acceleration of the ceiling C can be reduced and the shaking of the ceiling C can be damped early, thereby suppressing damage to the ceiling C.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible.

For example, in the above embodiment, specific mounting positions and mounting means of the first damper, the second damper, and the bundle material with respect to the suspension base and the ceiling have been described. If the first damper, the second damper and the bundle material can be damped and the bundle material can suppress the out-of-plane deformation of the ceiling due to the expansion and contraction of the first damper and the second damper, the first damper, the second damper and the bundle material can be placed at any position, by any means, etc. It may be suspended and attached to the ceiling.

Also, in the above embodiment, a brace as in Comparative Example 1 may be provided. By providing such braces, the resistance of the ceiling damping system can be further improved, and damage to the ceiling material can be appropriately prevented particularly during a moderate earthquake.

Further, in the above-described embodiment, a reinforcing member may be arranged on the side of the ceiling joist receiver 4 opposite to the ceiling material 2 (upper side of the ceiling joist receiver 4) and extend in a direction orthogonal to the ceiling joist receiver 4. By providing such a reinforcing member, the strength of the ceiling damping system can be further improved. In addition, the lower end of the brace may be fixed to the ceiling joist support, or may be fixed to the reinforcing member.

1, 1A, 1B, 1C, 1D, 1F, 1G... ceiling damping system, 2... ceiling material, 3... joist, 4... joist receiver, 5... suspension bolt, 5a... first suspension bolt, 5b... second Second suspension bolt 5c Third suspension bolt 5d Fourth suspension bolt 5e Fifth suspension bolt 6 First damper 6a First joint 6b Second joint 7 Second damper 7a Second joint 8 Bundle 8a First bundle 8b Second bundle 9a First auxiliary metal fitting 9b Second auxiliary metal fitting 10a First assembly 10b Second set Solid, 11... Clip, 12... Hanging metal fitting, 13... Lower fixing metal fitting, 13a... First lower fixing metal fitting, 13b... Second lower fixing metal fitting, 13d... Fourth lower fixing metal fitting, 13e... Fifth lower fixing metal fitting, 13f...Sixth lower fixing metal fitting 13g...Seventh lower fixing metal fitting 13h...Eighth lower fixing metal fitting 13i...Ninth lower fixing metal fitting 14a...First upper fixing metal fitting 14b...Second upper fixing metal fitting 14c... Third upper fixing metal fitting 14d Fourth upper fixing metal fitting 14e Fifth upper fixing metal fitting 17a First suspension fixing metal fitting 17b Second suspension fixing metal fitting 17c Third suspension fixing metal fitting 17d ... fourth suspension fixing metal fitting, 17e... fifth suspension fixing metal fitting, 17f... sixth suspension fixing metal fitting, 17g... seventh suspension fixing metal fitting, 21... bundle material, 22... support member, 31... first damper , 32... Second damper 33... First vibration amplifying mechanism 33a... First brace 33b... Second brace 34... Second vibration amplifying mechanism 34a... First brace 34b... Second brace 110... Ceiling Damping system 111 First brace 112 Second brace 120 Ceiling damping system C Ceiling S Suspension base.

Claims (9)

A ceiling damping system disposed between a suspension base and a ceiling suspended from the suspension base,
a suspension bolt that is fixed to the suspension base and suspends the ceiling;
a first damper and a second damper arranged obliquely opposite to each other for damping vibrations generated in the ceiling;
a bundle member that extends in the vertical direction and suppresses out-of-plane deformation of the ceiling due to expansion and contraction of the first damper and the second damper;
The bundle material is arranged at a position different from the suspension bolt,
Ceiling damping system. A ceiling damping system disposed between a suspension base and a ceiling suspended from the suspension base,
a first damper and a second damper arranged obliquely opposite to each other for damping vibrations generated in the ceiling;
a bundle member that extends in the vertical direction and suppresses out-of-plane deformation of the ceiling due to expansion and contraction of the first damper and the second damper;
The first damper and the second damper have a smaller damping force in the compression direction than the damping force in the tension direction.
Ceiling damping system. Further comprising a suspension bolt that is fixed to the suspension base and suspends the ceiling,
The ceiling damping system according to claim 2. The suspension bolt has a first suspension bolt, a second suspension bolt, and a third suspension bolt arranged between the first suspension bolt and the second suspension bolt,
The bundle of materials includes a first bundle of materials arranged on the first suspension bolt side of the second suspension bolt, and a second bundle of materials arranged on the first suspension bolt side of the third suspension bolt. have
The ceiling damping system according to claim 1 or 3. The first damper has a first joint capable of adjusting the axial length of the first damper,
The second damper has a second joint capable of adjusting the axial length of the second damper,
A ceiling damping system according to any one of claims 1 to 4. The first damper and the second damper are arranged in a V shape that spreads upward,
A ceiling damping system according to any one of claims 1 to 5. The first damper and the second damper are arranged in a V shape that spreads downward,
A ceiling damping system according to any one of claims 1 to 6. The bundle has a first bundle and a second bundle that are separated from each other;
The first damper is fixed to the first bundle,
The second damper is fixed to the second bundle material,
A ceiling damping system according to any one of claims 1 to 7. a first vibration amplifying mechanism that amplifies an amount of expansion and contraction of the first damper accompanying vibration of the ceiling;
a second vibration amplifying mechanism that amplifies the expansion and contraction amount of the second damper accompanying the vibration of the ceiling;
A ceiling damping system according to any one of claims 1 to 8.

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