JP6977076B2 - Tuned mass damper and ceiling - Google Patents

Description

The present invention relates to a dynamic vibration absorber and a ceiling provided with the dynamic vibration absorbing device.

In buildings such as houses and condominiums, as a sound insulation measure for floor impact sound between the upper and lower floors, a method of incorporating vibration reducing means such as a vibration damping material or a dynamic vibration absorbing device into the ceiling base of the lower floor may be adopted.

For example, the dynamic vibration damping devices described in Patent Documents 1 and 2 are devices that are mounted and used on the upper surface of a ceiling board fixed to the lower surface of two field edges, and specifically, a mass body. And an elastic body provided on the lower surface of the mass body.

In the state where the ceiling board is fixed to the lower surface of the two field edges, the elastic body is in contact with the upper surface of the ceiling board, and the dynamic vibration absorber composed of the mass body and the elastic body stands on the upper surface of the ceiling board. become. Therefore, the vibration of the ceiling board is attenuated by utilizing the resonance of the vibration system composed of the mass body and the elastic body.

Japanese Unexamined Patent Publication No. 2018-02817 Japanese Unexamined Patent Publication No. 2018-123669

In the above-mentioned dynamic vibration absorber, an elastic body is in contact with the upper surface of the ceiling board. The ceiling board is generally a board having a rough surface such as gypsum board, and has a large frictional resistance between the ceiling board and the elastic body. Therefore, when installing the ceiling board, that is, when fixing the ceiling board to the lower surface of the two field edges, if the ceiling board is moved horizontally to fine-tune the horizontal position of the ceiling board, dynamic vibration absorption and vibration absorption will occur. The elastic body of the device also follows the ceiling board and moves in the horizontal direction, which may deform the elastic body.

When the elastic body is deformed, the resonance frequency of the dynamic vibration absorbing device deviates from the resonance frequency at the time of design, and there is a problem that the vibration reducing effect of the dynamic vibration absorbing device is lowered.

The present invention has been made in view of the above problems, and provides a dynamic vibration absorbing device capable of preventing deformation of an elastic body during construction of a ceiling board and preventing deterioration of vibration reduction performance, and a ceiling provided with the dynamic vibration absorbing device. It is to be.

The dynamic vibration absorbing device of the present invention is installed on a ceiling provided with two field edges arranged at intervals in a predetermined arrangement direction and a ceiling board fixed to the lower surface of both field edges. A vibration absorbing device, the mass body, the elastically deformable elastic body provided on the lower surface of the mass body, and the two fields before the ceiling board is fixed to the two field edges. as the elastic body between the edge protrudes below the field edge, with temporarily holding the mass in the field edge of the two, by the ceiling board is mounted in the field edge of the two The two pieces of the mass body are lifted upward while the elastic body and the mass body are placed on the ceiling board so that the mass body and the two field edges are not in contact with each other. A frictional resistance smaller than the frictional resistance between the ceiling board and the elastic body, which is interposed between the elastic body and the ceiling board and the temporary holding means capable of releasing the temporary holding to the field edge. It is characterized by being provided with low friction means.

According to this configuration, since the low friction means is interposed between the elastic body and the ceiling board, the elastic body is placed on the upper surface of the ceiling board in the construction work of fixing the ceiling board to the lower surface of the two field edges. Even if the ceiling board is moved in the horizontal direction when finely adjusting the horizontal position of the ceiling board in the mounted state, the elastic body slips and it becomes difficult to follow the ceiling board. Thereby, it is possible to prevent the deformation of the elastic body and prevent the deterioration of the vibration reducing performance of the dynamic vibration absorbing device.

In the above-mentioned dynamic vibration absorber, a plurality of the elastic bodies are connected to the lower surface of the mass body at intervals in the extending direction of the field edge and / or the arrangement direction, and each of the plurality of elastic bodies and the ceiling board. It is preferable that the low friction means is interposed between the and.

According to this configuration, since the plurality of elastic bodies are arranged at intervals in the extending direction of the field edge and / or in the arrangement direction of the field edge, a mass body having a large weight is supported by the plurality of elastic bodies in a well-balanced manner. Moreover, it is possible to avoid contact between elastic bodies. Further, since the low friction means is interposed between each of the plurality of elastic bodies and the ceiling board, it is possible to prevent the plurality of elastic bodies from being deformed at the time of construction of the ceiling board.

In the above-mentioned dynamic vibration absorber, the lower surface of the mass body has a rectangular shape having four sides extending along the extending direction of the field edge and the arrangement direction, and the elastic body is the lower surface of the mass body. It is preferable that the four corners of the above are dispersedly arranged at positions that allow a gap between the four corners and the field edge.

According to this configuration, the elastic bodies are dispersedly arranged at the four corners of the lower surface of the rectangular shape of the mass body and at positions that allow a gap between the elastic body and the field edge, that is, at a position near the field edge. It is possible to support a mass body with a large weight in a well-balanced manner by a plurality of elastic bodies. Further, even if the elastic body is arranged at a position near the field edge, the elastic body is prevented from being deformed by the low friction means as described above, so that the elastic body is deformed during the construction of the ceiling board. It is possible to avoid contact with the field edge, thereby preventing a significant decrease in the vibration reducing performance of the dynamic vibration absorbing device.

In the dynamic vibration absorbing device, the elastic body has a shape extending in the extending direction of the field edge, sandwiches a center line between the two field edges, and the distance to the field edge is the center. It is preferable that two lines are arranged at positions that allow a gap between the lower surface of the mass body and the field edge at intervals in the arrangement direction so as to be closer than the distance to the line.

According to this configuration, the elastic body has an elongated shape extending in the extending direction of the field edge, sandwiches the center line between the two field edges, and the distance to the field edge is larger than the distance to the center line. Since the two are arranged at a position that allows a gap between the bottom surface of the mass body and the field edge, that is, a position near the field edge, with an interval in the arrangement direction of the field edge so that they are close to each other. It is possible to support a heavy mass body in a more balanced manner by two long and thin elastic bodies. Further, even if the two long and thin elastic bodies are arranged near the field edge, the elastic bodies are prevented from being deformed by the low friction means as described above, so that the elastic bodies are elastic at the time of construction of the ceiling board. It is possible to prevent the body from deforming and coming into contact with the field edge, thereby preventing a significant decrease in the vibration reducing performance of the dynamic vibration absorbing device.

In the above-mentioned dynamic vibration absorber, the elastic body spreads in the extending direction of the field edge and the arrangement direction so as to allow a gap between the elastic body and the field edge, and covers a predetermined range of the lower surface of the mass body. It preferably has a shape having one surface.

According to such a configuration, a single surface in which the elastic body extends in the extending direction of the field edge and in the arrangement direction so as to allow a gap between the elastic body and the field edge and covers a predetermined range of the lower surface of the mass body. Since it has a shape having a large area, it is possible to support a mass body having a large weight in a more balanced manner by one elastic body having a single surface having a large area. Further, even if one elastic body having a large area and a single surface extends to the vicinity of the field edge so as to allow a gap between the elastic body and the field edge, the elastic body is provided by the low friction means as described above. Since the deformation of the is prevented, it is possible to prevent the elastic body from deforming and coming into contact with the field edge during the construction of the ceiling board, thereby preventing a significant decrease in the vibration reduction performance of the dynamic vibration absorbing device. be.

In the above-mentioned dynamic vibration absorbing device, the mass body has an facing surface facing the side surface of the field edge between the two field edges, and the distance between the facing surface and the side surface of the field edge is , It is preferable that the distance between the elastic body and the side surface of the field edge is smaller than the distance.

According to such a configuration, the mass body has an facing surface facing the side surface of the field edge between the two field edges, and the distance between the facing surface and the side surface of the field edge is determined. Since it is set to be smaller than the distance between the elastic body and the side surface of the field edge, even if the elastic body and the mass body move horizontally in the arrangement direction of the field edge during construction of the ceiling board, the mass body Since the facing surface of the elastic body contacts the field edge before the elastic body, it is possible to more reliably prevent the elastic body from contacting the field edge, thereby preventing a significant decrease in the vibration reduction performance of the dynamic vibration absorber. It is possible.

The ceiling of the present invention has two field edges arranged at intervals in a predetermined arrangement direction, a ceiling board fixed to the lower surface of the field edge, and the above-mentioned ceiling board mounted on the upper surface of the ceiling board. It is characterized by being equipped with a dynamic vibration absorbing device.

In the above ceiling, in the construction work of fixing the ceiling board to the lower surface of the two field edges, it is only necessary to place the dynamic vibration absorber on the upper surface of the ceiling board, and the dynamic vibration absorber is attached to the ceiling board with a fixing member such as a bracket. No need to use and install. Therefore, it is possible to easily perform the construction work of the ceiling board. Further, since the low friction means is interposed between the elastic body and the ceiling board, when the ceiling board is constructed, the horizontal position of the ceiling board is slightly adjusted while the elastic body is placed on the upper surface of the ceiling board. Even if the ceiling board is moved horizontally during adjustment, the elastic body slips and it becomes difficult to follow the ceiling board. Thereby, it is possible to prevent the deformation of the elastic body and prevent the deterioration of the vibration reducing performance of the dynamic vibration absorbing device.

It is preferable that the ceiling further includes a regulating portion that regulates a range in which the elastic body moves horizontally relative to the ceiling board.

According to such a configuration, the regulating portion can regulate the range in which the elastic body moves horizontally relative to the ceiling board, and more reliably prevents the elastic body from being deformed during the construction of the ceiling board. It is possible to do.

According to the present invention, it is possible to provide a dynamic vibration absorbing device capable of preventing deformation of an elastic body during construction of a ceiling board and preventing deterioration of vibration reduction performance, and a ceiling provided with the dynamic vibration absorbing device.

It is a perspective view which shows the structure seen from the upper side of the ceiling provided with the dynamic vibration damping device which concerns on embodiment of this invention. It is a perspective view which shows the structure seen from the lower side with the ceiling of FIG. 1 removed from the ceiling board. It is a figure which looked at the state which the dynamic vibration damping device of FIG. 1 was temporarily held by two field edges from the extending direction of a field edge. FIG. 3 is a view of the dynamic vibration absorber of FIG. 3 as viewed from below. It is sectional drawing which shows the construction work which fixes the ceiling board in the ceiling of FIG. 1 to the lower surface of two field edges. As a comparative example of the present invention, it is sectional drawing which shows the state which the elastic body is deformed at the time of construction of the ceiling board in the ceiling to which the conventional dynamic vibration absorption apparatus which does not have a low friction means is applied. It is a figure which looked at the dynamic vibration absorption apparatus provided with two long thin elastic bodies which concerns on the modification of this invention from the bottom. It is a figure which looked at from the bottom of the dynamic vibration absorber provided with one large elastic body which concerns on other modification of this invention. It is a figure which looked at from the bottom of the dynamic vibration damping device provided with the regulation part which regulates the range which the elastic body which concerns on still another modification of this invention moves horizontally with respect to a ceiling board.

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

The ceiling 20 shown in FIGS. 1 and 2 has a plurality of field edges 2 arranged at intervals in a predetermined arrangement direction D1, a field edge receiver 3 that receives these field edges 2, and a plurality of floors. It includes a beam 4, a ceiling board 5 fixed to the lower surface 2b (see FIG. 5) of the field edge 2, and a plurality of dynamic vibration absorbing devices 1 mounted on the upper surface of the ceiling board 5.

The field edge 2 is an elongated structural material, and is arranged in parallel with an interval from each other in the arrangement direction D1 orthogonal to the arrangement direction of the floor beams 4. The field edge 2 is composed of, for example, a rectangular columnar elongated metal tubular body provided with a hollow portion.

The field edge receiver 3 is an elongated structural material, and is arranged on the upper surface of each of the plurality of field edges 2. The field edge receiver 3 is orthogonal to each field edge 2 and is assembled in a grid pattern with respect to the field edge 2. The field edge receiver 3 is composed of, for example, a U-shaped elongated metal columnar body having an opening on one side.

The floor beam 4 is for supporting the floor of the upper floor, and is a structural material (for example, H steel) made of steel or the like extending in one direction. As shown in FIG. 1, the floor beams 4 are arranged in parallel at intervals so as to be orthogonal to the field edge 2.

The plurality of dynamic vibration absorbing devices 1 are arranged at intervals from each other in the extending direction D2 of the field edge 2. Hereinafter, a specific configuration of the dynamic vibration absorbing device 1 will be described.

As shown in FIGS. 3 to 4, the dynamic vibration absorber 1 includes a mass body 6, an elastically deformable elastic body 7 provided on the lower surface 6a of the mass body 6, and two field edges 2 of the mass body 6. The temporary holding means (in the present embodiment, the protrusion 9) and the low friction means (in the present embodiment, the low friction sheet 8) interposed between the elastic body 7 and the ceiling board 5 are provided.

The mass body 6 is made of a metal having a certain weight or the like, and for example, a plate-shaped body made of metal, gypsum or the like is used. The mass body 6 of the present embodiment has a main body portion 10 arranged between two field edges 2 and a protrusion portion 9 to be described later that protrudes from the main body portion 10 on both sides in the arrangement direction D. The main body 10 of the mass body 6 is formed on a rectangular lower surface 6a having four sides extending along the extending direction D2 of the field edge and the arrangement direction D1 and on the side surface 2c of the field edge 2 between the two field edges 2. It has facing surfaces 6b and facing each other. The rectangular lower surface 6a has a width slightly smaller than the width between the two field edges 2.

As shown in FIG. 3, the distance t1 between the facing surface 6b and the side surface 2c of the field edge 2 is set to be smaller than the distance t2 between the elastic body 7 and the side surface 2c of the field edge 2.

The elastic body 7 is made of a material having a property of being more elastically deformable than the mass body 6 and the ceiling board 5, and is manufactured of, for example, urethane, foam rubber, glass wool, or the like.

In the present embodiment, as shown in FIGS. 2 and 4, a plurality of elastic bodies 7 are connected to the lower surface 6a of the mass body 6 at intervals in the extending direction D2 and / or the arrangement direction D1 of the field edge 2. There is. More specifically, the elastic bodies 7 of the present embodiment shown in FIG. 4 are dispersedly arranged at the four corners of the lower surface 6a of the mass body 6 at positions allowing a gap between the elastic body 7 and the field edge 2. There is.

The temporary holding means temporarily attaches the mass body 6 to the two field edges 2 so that the elastic body 7 protrudes below the field edges 2 in the state before the ceiling board 5 is fixed to the two field edges 2. Anything may be used as long as it has a function of holding. In the present embodiment, as the temporary holding means, protrusions 9 protruding on both sides in the arrangement direction D at the upper end of the main body 10 of the mass body 6 are used.

Since the protrusions 9 project to both sides of the arrangement direction D1 at the upper end of the main body 10 of the mass body 6, as shown in FIG. 3, before the ceiling board 5 is fixed to the two field edges 2. In the state, it abuts on the upper surface 2a of the field edge 2. Thereby, the mass body 6 can be temporarily held by the two field edges 2 so that the elastic body 7 projects below the field edges 2 between the two field edges 2. On the other hand, as shown in FIG. 5, by attaching the ceiling board 5 to the two field edges 2, the elastic body 7 and the mass body 6 are placed on the ceiling board 5 and lifted upward, whereby the elastic body 7 and the mass body 6 are lifted upward. The temporary holding of the mass body 6 by the protrusion 9 is released, and the field edge 2 and the mass body 6 are not in contact with each other.
The protrusion 9 shown in FIG. 3 is integrally formed with the mass body 6, but may be a separate member from the mass body 6. Further, if the mass body 6 can be temporarily held on the field edge 2 in addition to the protrusion 9, it can be used as the temporary holding means of the present invention.

The low-friction means may be interposed between the elastic body 7 and the ceiling board 5 and have a frictional resistance smaller than the frictional resistance between the ceiling board 5 and the elastic body 7, and the low-friction means may be installed. The surface may be either the ceiling board 5 or the elastic body 7. In this embodiment, the low friction sheet 8 is used as the low friction means.

The low-friction sheet 8 is made of a fluororesin (for example, Teflon (registered trademark)) sheet or the like, and is fixed to the lower surface 7a of each of the plurality of elastic bodies 7 by adhesion or the like, whereby the ceiling board 5 and the elastic body 7 are fixed. A frictional resistance smaller than the frictional resistance between the two is provided between the elastic body 7 to which the low friction sheet 8 is fixed and the ceiling board 5.

The dynamic vibration absorbing device 1 of the present embodiment configured as described above includes a low friction sheet 8 interposed between each of the plurality of elastic bodies 7 and the ceiling board 5. As a result, as shown in FIG. 5, when the ceiling board 5 is attached from below after temporarily holding the dynamic vibration absorbing device 1 on the field edge 2, the ceiling board 5 is mounted in the horizontal direction (for example, the arrangement direction D1 of the field edge 2). Alternatively, even if the field edge 2 perpendicular to the extension direction D2) is slightly shifted and slightly modified, the low friction sheet 8 interposed between the elastic body 7 and the ceiling board 5 is formed between the elastic body 7 and the ceiling board 5. Since the frictional resistance between them is reduced, the elastic body 7 slips and becomes difficult to follow the ceiling board 5, and it is possible to prevent the elastic body 7 from being deformed. Further, it is possible to prevent the elastic body 7 from coming into contact with the field edge 2 around the elastic body 7.

(Characteristics of this embodiment)
(1)
The dynamic vibration absorbing device 1 of the present embodiment includes two field edges 2 arranged at intervals in a predetermined arrangement direction D1 and a ceiling board 5 fixed to the lower surface 2b of both field edges 2. It is installed on the ceiling 20. There are two dynamic vibration absorbing devices 1, the mass body 6, the elastic deformable elastic body 7 provided on the lower surface 6a of the mass body 6, and the ceiling board 5 in the state before being fixed to the two field edges 2. The elastic body 7 projects below the field edge 2 between the field edges 2 and the ceiling board 5 is attached to the two field edges 2 so that the elastic body 7 is placed on the ceiling board 5. The protrusion 9 which is a temporary holding means for temporarily holding the mass body 6 to the two field edges 2 is interposed between the elastic body 7 and the ceiling board 5, and the friction between the ceiling board 5 and the elastic body 7. It is provided with a low friction sheet 8 which is a low friction means having a friction resistance smaller than the resistance.

According to this configuration, since the low friction sheet 8 is interposed between the elastic body 7 and the ceiling board 5, the ceiling board 5 is placed on the lower surface 2b of the two field edges 2 as shown in FIG. In the construction work of fixing, even if the ceiling board 5 is moved in the horizontal direction when the horizontal position of the ceiling board 5 is finely adjusted while the elastic body 7 is placed on the upper surface of the ceiling board 5, the elastic body 7 is still formed. It slips and becomes difficult to follow the ceiling board 5. Thereby, it is possible to prevent the elastic body 7 from being deformed and to prevent the vibration reducing performance of the dynamic vibration absorbing device 1 from being deteriorated.

Here, as a comparative example, consider the case of a dynamic vibration absorbing device not provided with a low friction means (low friction sheet 8) as shown in FIG. In the dynamic vibration absorbing device of this comparative example, in the construction work of the ceiling board 5, the horizontal position of the ceiling board 5 is finely adjusted while the elastic body 7 is in direct contact with the upper surface of the ceiling board 5. Therefore, the ceiling board 5 is used. When moved in the horizontal direction, the elastic body 7 follows the ceiling board 5 and moves in the horizontal direction due to the large frictional resistance generated between the elastic body 7 and the ceiling board 5, thereby causing the elastic body 7 to move in the horizontal direction. There is a problem of deformation.

Compared with the comparative example of FIG. 6, in the present embodiment shown in FIG. 5, the low friction sheet 8 interposed between the elastic body 7 and the ceiling board 5 is between the elastic body 7 and the ceiling board 5. It is understood that the frictional resistance of the elastic body 7 is reduced, which contributes to the prevention of deformation of the elastic body 7 and the prevention of deterioration of the vibration reducing performance of the dynamic vibration absorbing device 1.

(2)
In the dynamic vibration absorbing device 1 of the present embodiment, as shown in FIG. 4, a plurality of elastic bodies 7 are connected to the lower surface 6a of the mass body 6 at intervals in the extending direction D2 and / or the arrangement direction D1 of the field edge 2. Has been done. A low friction sheet 8 is interposed between each of the plurality of elastic bodies 7 and the ceiling board 5.

According to this configuration, since the plurality of elastic bodies 7 are arranged at intervals in the extending direction D2 of the field edge 2 and / or the arrangement direction D1 of the field edge 2, the mass body 6 having a large weight has a plurality of elastic bodies 6. It is possible to support the elastic bodies 7 in a well-balanced manner by the body 7, and it is possible to avoid contact between the elastic bodies 7. Further, since the low friction sheet 8 is interposed between each of the plurality of elastic bodies 7 and the ceiling board 5, it is possible to prevent the plurality of elastic bodies 7 from being deformed at the time of construction of the ceiling board 5. Is possible.

(3)
In the dynamic vibration absorbing device 1 of the present embodiment, as shown in FIG. 4, the lower surface 6a of the mass body 6 has a rectangular shape having four sides extending along the extending direction D2 and the arrangement direction D1 of the field edge. There is. Further, the elastic bodies 7 are dispersedly arranged at the four corners of the lower surface 6a of the mass body 6 at positions allowing a gap between the elastic body 7 and the field edge 2.

According to this configuration, the elastic bodies 7 are distributed and arranged at the four corners of the rectangular lower surface 6a of the mass body 6 and allow a gap between the elastic body 7 and the field edge 2, that is, in the vicinity of the field edge 2. Therefore, it is possible to support the mass body 6 having a large weight in a well-balanced manner by the plurality of elastic bodies 7. Further, even if the elastic body 7 is arranged at a position near the field edge 2, the low friction sheet 8 prevents the elastic body 7 from being deformed as described above, so that the elastic body 7 is elastic at the time of construction of the ceiling board 5. It is possible to prevent the body 7 from being deformed and coming into contact with the field edge 2, thereby preventing a significant decrease in the vibration reducing performance of the dynamic vibration absorbing device 1.

(4)
In the dynamic vibration absorbing device 1 of the present embodiment, as shown in FIG. 3, the mass body 6 has a facing surface 6b facing the side surface 2c of the field edge 2 between the two field edges 2. The distance t1 between the facing surface 6b and the side surface 2c of the field edge 2 is set to be smaller than the distance t2 between the elastic body 7 and the side surface 2c of the field edge 2.

According to this configuration, the mass body 6 has an facing surface 6b facing the side surface 2c of the field edge 2 between the two field edges 2, and the facing surface 6b and the side surface 2c of the field edge 2 Since the distance is set to be smaller than the distance between the elastic body 7 and the side surface 2c of the field edge 2, the elastic body 7 and the mass body 6 are arranged in the arrangement direction D1 of the field edge 2 at the time of construction of the ceiling board 5. Even if the mass body 6 moves horizontally, the facing surface 6b of the mass body 6 comes into contact with the field edge 2 before the elastic body 7, so that the elastic body 7 does not come into contact with the field edge 2 more reliably, thereby. It is possible to prevent a significant decrease in the vibration reduction performance of the dynamic vibration absorbing device 1.

(5)
The ceiling 20 of the present embodiment has two field edges 2 arranged at intervals in a predetermined arrangement direction D1, a ceiling board 5 fixed to the lower surface 2b of the field edge 2, and an upper surface of the ceiling board 5. The dynamic vibration absorbing device 1 of the present embodiment mounted on the ceiling is provided.

In the ceiling 20 of the present embodiment, in the construction work of fixing the ceiling board 5 to the lower surface 2b of the two field edges 2, it is only necessary to place the dynamic vibration absorbing device 1 on the upper surface of the ceiling board 5, and the dynamic vibration absorbing device 1 There is no need to attach the ceiling board 5 to the ceiling board 5 using a fixing member such as a bracket. Therefore, it is possible to easily perform the construction work of the ceiling board 5. Further, since the low friction sheet 8 is interposed between the elastic body 7 and the ceiling board 5, the ceiling is placed on the upper surface of the ceiling board 5 when the ceiling board 5 is constructed. Even if the ceiling board 5 is moved in the horizontal direction when finely adjusting the horizontal position of the board 5, the elastic body 7 slips and it becomes difficult to follow the ceiling board 5. Thereby, it is possible to prevent the elastic body 7 from being deformed and to prevent the vibration reducing performance of the dynamic vibration absorbing device 1 from being deteriorated.

(Modification example)
(A)
In the above embodiment, as an example of the low friction means of the present invention, which is interposed between the elastic body 7 and the ceiling board 5 and has a frictional resistance smaller than the frictional resistance between the ceiling board 5 and the elastic body 7, elasticity is used. The low-friction sheet 8 adhered to the lower surface 7a of the body 7 has been described as an example, but the present invention is not limited thereto.

Therefore, the low friction means such as the low friction sheet 8 may be provided not only on the lower surface 7a of the elastic body 7 but also on the upper surface of the ceiling board 5. Further, the low friction member may be provided between the elastic body 7 and the ceiling board 5 without being fixed to the elastic body 7 and the ceiling board 5.

Further, the low friction means of the present invention is not limited to the low friction sheet, and may be any means as long as the friction resistance is smaller than the friction resistance between the ceiling board 5 and the elastic body 7. The installation location may be either the ceiling board 5 or the elastic body 7. Therefore, as another example of the low friction means of the present invention, a slippery coating may be formed on at least one of the surfaces of the ceiling board 5 and the elastic body 7 facing each other, or the ceiling board 5 may be formed. A part of the upper surface of the above surface may be smoothed to make it slippery.

As described above, the low-friction means of the present invention may operate as long as the low-friction means can reduce the frictional resistance between the elastic body 7 and the ceiling board 5 without incurring a high manufacturing cost. It is possible to prevent the performance of the vibration absorber from deteriorating.

The dynamic vibration absorbing device of the present invention may be mounted on the ceiling board 5, and the shape of the dynamic vibration absorbing device is not particularly limited.

(B)
In the above embodiment, as shown in FIG. 4, an example in which four elastic bodies 7 are dispersedly arranged on the lower surface 6a of the mass body 6 is shown, but the arrangement and shape of the elastic bodies 7 are based on this. Not limited.

As shown in FIG. 7, as a modification of the dynamic vibration absorbing device of the present invention, the elastic body 7 has a shape extending in the extending direction D2 of the field edge 2, and is a center line between the two field edges 2. A gap between the mass body 6 and the field edge 2 on the lower surface 6a of the mass body 6 at intervals in the arrangement direction D1 so that the distance d1 to the field edge 2 is closer than the distance d2 to the center line CL while sandwiching the CL. Two may be arranged at a position which allows.

According to this configuration, the elastic body 7 has an elongated shape extending in the extending direction D2 of the field edge 2, sandwiches the central line CL between the two field edges 2, and has a distance d1 to the field edge 2. A position that allows a gap between the field edge 2 and the field edge 2 on the lower surface 6a of the mass body 6 at intervals in the arrangement direction D1 of the field edge 2 so that is closer than the distance d2 to the center line CL, that is, the field. Since the two are arranged in the vicinity of the edge 2, it is possible to support the mass body 6 having a large weight in a more balanced manner by the two elongated elastic bodies 7. Further, even if the two long and thin elastic bodies 7 are arranged at positions in the vicinity of the field edge 2, the low friction sheet 8 is interposed between each elastic body 7 and the ceiling board 5, and the above-mentioned Since the low friction sheet 8 prevents the elastic body 7 from being deformed as described above, it is possible to prevent the elastic body 7 from being deformed and contacting the field edge 2 during the construction of the ceiling board 5, thereby preventing the elastic body 7 from coming into contact with the field edge 2. It is possible to prevent a significant decrease in the vibration reduction performance of 1.

(C)
As shown in FIG. 8, as another modification of the dynamic vibration absorbing device of the present invention, the elastic body 7 has an extending direction D2 and an arrangement direction D1 of the field edge 2 so as to allow a gap between the elastic body 7 and the field edge 2. It may have a shape having a single surface that extends to cover a predetermined range of the lower surface 6a of the mass body 6.

According to this configuration, the elastic body 7 extends in the extending direction D2 and the arrangement direction D1 of the field edge 2 so as to allow a gap between the elastic body 7 and the field edge 2, and covers a predetermined range of the lower surface 6a of the mass body 6. Since it has a shape having one surface, it is possible to support a mass body 6 having a large weight in a more balanced manner by one elastic body 7 having a single surface having a large area. Further, even if one elastic body 7 having a single surface having a large area extends to the vicinity of the field edge 2 so as to allow a gap between the elastic body 7 and the field edge 2, the elastic body 7 is described above. A low-friction sheet 8 is interposed between the ceiling board 5 and the low-friction sheet 8, and the elastic body 7 is prevented from being deformed by the low-friction sheet 8. Therefore, the elastic body 7 is deformed during the construction of the ceiling board 5. It is possible to avoid contact with the field edge 2 and thereby prevent a significant decrease in the vibration reducing performance of the dynamic vibration absorbing device 1.

(D)
As shown in FIG. 9, as a modification of the ceiling of the present invention, the ceiling 20 further includes the regulating portions 11 and 12 that regulate the range in which the elastic body 7 moves horizontally relative to the ceiling board 5. You may.

Specifically, the regulating portion 11 is provided on the upper surface of the ceiling board 5 at a peripheral portion of the mounting position of the elastic body 7. The regulating portion 11 is composed of a protrusion fixed to the upper surface of the ceiling board 5 by adhesion or the like, or a member such as rubber that generates a higher frictional resistance than the low friction sheet 8.

Further, the regulating portion 12 is provided on the side surface of the field edge 2 facing the mass body 6. The regulating portion 12 is composed of protrusions or the like provided on the side surface of the field edge 2, and regulates the range in which the elastic body 7 moves horizontally with respect to the ceiling board 5 by abutting against the mass body 6. Is possible.

According to the configuration of FIG. 9 above, it is possible to regulate the range in which the elastic body 7 moves horizontally relative to the ceiling board 5 by the regulating portions 11 and 12, and it is possible to regulate the range in which the elastic body 7 moves relatively horizontally with respect to the ceiling board 5 at the time of construction of the ceiling board 5. It is possible to more reliably prevent the deformation of the elastic body 7.

It should be understood that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Tuned mass absorber 2 Field edge 2b Bottom surface 2c Side surface 5 Ceiling board 6 Mass body 6a Opposing surface 7 Elastic body 8 Low friction sheet (low friction means)
9 Protrusions (temporary holding means)
10 Main body 11, 12 Restriction 20 Ceiling

Claims (8)

A dynamic vibration damping device installed on a ceiling provided with two field edges arranged at intervals in a predetermined arrangement direction and a ceiling board fixed to the lower surface of both field edges.
Mass body and
An elastic body that can be elastically deformed provided on the lower surface of the mass body,
In a state before the ceiling board is fixed to the two field edges, the mass body is placed between the two field edges so that the elastic body projects below the field edges. while temporarily held to ceiling joists, lifted upward in a state where the elastic member and the mass body is mounted on the ceiling board by the ceiling board is mounted in the field edge of the two, the mass body And the temporary holding means capable of releasing the temporary holding of the mass body to the two field edges so that the two field edges are not in contact with each other.
A dynamic vibration damping device comprising a low friction means that is interposed between the elastic body and the ceiling board and has a frictional resistance smaller than the frictional resistance between the ceiling board and the elastic body. A plurality of the elastic bodies are connected to the lower surface of the mass body at intervals in the extending direction of the field edge and / or in the arrangement direction.
The low friction means is interposed between each of the plurality of elastic bodies and the ceiling board.
The dynamic vibration damping device according to claim 1. The lower surface of the mass has a rectangular shape having four sides extending along the extending direction of the field edge and the arrangement direction.
The elastic bodies are dispersedly arranged at four corners of the lower surface of the mass body at positions that allow a gap between the elastic body and the field edge.
The dynamic vibration damping device according to claim 2. The elastic body has a shape extending in the extending direction of the field edge, sandwiches a center line between the two field edges, and the distance to the field edge is closer than the distance to the center line. Two of them are arranged so as to allow a gap between the bottom surface of the mass body and the field edge at intervals in the arrangement direction.
The dynamic vibration damping device according to claim 2. The elastic body has a shape having a single surface that extends in the extending direction of the field edge and the arrangement direction so as to allow a gap between the elastic body and the field edge and covers a predetermined range of the lower surface of the mass body. Have,
The dynamic vibration damping device according to claim 1. The mass body has an facing surface facing the side surface of the field edge between the two field edges.
The distance between the facing surface and the side surface of the field edge is set to be smaller than the distance between the elastic body and the side surface of the field edge.
The dynamic vibration damping device according to any one of claims 1 to 5. Two field edges arranged at intervals in a predetermined arrangement direction,
The ceiling board fixed to the lower surface of the field edge and
A ceiling provided with the dynamic vibration absorbing device according to any one of claims 1 to 6, which is mounted on the upper surface of the ceiling board. It further comprises a regulatory section that regulates the range in which the elastic body moves horizontally relative to the ceiling board.
The ceiling according to claim 7.

Images