JP2020070641A - Ceiling structure of building and construction method for ceiling structure of building - Google Patents

Abstract

To provide a ceiling structure of a building and a construction method for the ceiling structure of the building, which can reduce the impact noise from an upper floor and improve the workability of installation.SOLUTION: A ceiling structure 100 of a building according to the present disclosure comprises: an upper structure; a ceiling 3 provided below the upper structure and having a ceiling plate 3a and a ceiling joist 7; and a sound absorbing body 4 mounted on the ceiling 3. The sound absorbing body 4 has a granular body and a plurality of containers that house the granular body and are connected in the arrangement direction of the ceiling joist 7, and is arranged so as to straddle the plurality of ceiling joists 7, wherein the proportion of a laid area is higher in an arrangement direction central portion than in an arrangement direction outer side portion of the ceiling joist.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a building ceiling structure and a method for constructing a building ceiling structure.

  Conventionally, in apartment houses and multi-story houses with two or more floors, the sound of life from the upper floor may be offensive to residents on the lower floor, especially in apartment houses where other people live in adjacent living spaces. It could cause trouble.

  To solve such a problem, for example, Patent Document 1 discloses a ceiling structure including an upper structure, a ceiling formed below the upper structure with a gap, and a sound absorber mounted on the ceiling. The sound absorbing body has a granular body and a container for containing the granular body, and the granular body is perlite, natural glass foam, sand, or a mixture of at least two of these. There is disclosed a ceiling structure in which the containers are mounted on the ceiling plate of the ceiling in a row at predetermined intervals while avoiding the hanging bolts to enhance the effect of reducing the floor impact sound of the upper floor.

  Further, Patent Document 2 is a sound absorbing member that is mounted on a ceiling and absorbs vibration of the ceiling, and includes a granular body mainly composed of zeolite and a bag-shaped container that houses the granular body. , Perlite, natural glass foam, sand, charcoal or a mixture thereof, or zeolite.

  Further, in Patent Document 3, a first sound absorbing body including a granular body and a first container that houses the granular body, and a second sound absorbing body including a granular body and a second container that houses the granular body are mounted on a ceiling. It is disclosed that the first sound absorbing body and the second sound absorbing body are individually installed on the ceiling plate and the base material, respectively, in the sound absorbing structure that absorbs the floor impact sound of the upper floor.

  Further, Patent Document 4 discloses a sound absorbing structure that is mounted on a ceiling and absorbs floor impact sound of an upper floor, and has a granular body and a first container that houses the granular body, and an upper surface of a ceiling board of the ceiling. A first sound absorbing body having a first sound absorbing body mounted on the above, a granular body and a second container accommodating the granular body, and comprising a second sound absorbing body mounted on the upper surface of the base material of the ceiling. Is fixed to the ceiling board, and the second sound absorber is fixed to the base material.

  Further, Patent Document 5 discloses a ceiling structure including an upper structure, a ceiling formed below the upper structure with a gap, and a sound absorber mounted on the ceiling. , A granular body and a container for accommodating the granular body, the granular body being perlite, natural glass foam, sand, or a mixture thereof, in a state where the container straddles the ceiling edge. Discloses a ceiling structure mounted on a ceiling plate of the ceiling.

  Further, in Patent Document 6, a ceiling having holes formed at predetermined intervals is provided under a slab, and carbon powder having a controlled powder diameter is housed in a container made of a sheet member that ensures air permeability. There is disclosed a living environment-improving building structure and a living environment-improving construction method capable of reducing impact noise by laying the structure in a house.

Japanese Patent No. 6105101 JP, 2017-20167, A Japanese Patent No. 6381759 JP, 2015-148108, A Patent No. 5950750 JP, 2010-31599, A

  However, in the ceiling structure and the like described in the above patent document, after the ceiling is installed below the upper structure, the sound absorber is arranged on the back side of the ceiling, so the worker must move to above the ceiling to perform work. There was room for improvement, at least in terms of workability.

  The present disclosure has been made in view of such problems, and an object thereof is to improve the workability of installation while reducing the impact noise from the upper floor, and the ceiling structure of the building and the ceiling structure of the building. To provide the construction method of.

The ceiling structure of the building of the present disclosure is
An upper structure,
A ceiling provided below the upper structure and having a ceiling plate and a field edge;
A sound absorber mounted on the ceiling,
The sound absorber is
Granular material,
It has a plurality of containers for accommodating the granular bodies and connected in the arrangement direction of the field edge, and is arranged so as to straddle the plurality of field edges, and the central portion in the arrangement direction rather than the outer side portion of the field edge in the arrangement direction. Is characterized by a higher proportion of the laid area.

  Further, in the ceiling structure of the building of the present disclosure, in the above-mentioned configuration, the plurality of containers connect the first containers and the first containers respectively arranged on adjacent field edges, and connect the first containers to each other on the ceiling board. It is preferable to have a 2nd container arranged.

  Further, in the ceiling structure of the building according to the present disclosure, in the above configuration, it is preferable that the upper structure is a beam of a steel frame structure.

Further, the ceiling structure of the building of the present disclosure is
An upper structure,
A ceiling provided below the upper structure and having a ceiling plate and a field edge;
A sound absorber mounted on the ceiling,
The sound absorber is
Granular material,
A plurality of containers for accommodating the granular body and having a plurality of containers connected in the arrangement direction of the field edge are provided, and the field edge arranged at at least one end in the direction of the field edge and adjacent to the field edge. It is characterized in that it is arranged so as to straddle a plurality of fields, excluding one or more fields.

Further, the construction method of the ceiling structure of the building of the present disclosure,
An upper structure,
A ceiling provided below the upper structure and having a ceiling plate and a field edge;
A method for constructing a ceiling structure of a building comprising a sound absorber mounted on the ceiling,
The sound absorber is
Granular material,
The granular body is housed and has a plurality of containers connected in the arrangement direction of the field edge, and is arranged so as to straddle the plurality of field edges,
The step of setting up a field
Arranging the sound absorbing body so as to straddle a plurality of fields after setting the fields,
Fixing the ceiling plate to the field edge from below after disposing the sound absorbing body.

  According to the present disclosure, it is possible to provide a ceiling structure of a building and a method of constructing a ceiling structure of a building that can improve workability of installation while reducing impact noise from the upper floor.

It is a front view showing composition of a ceiling structure of a building concerning one embodiment of this indication. 1A is a plan view and FIG. 1B is a front view showing a configuration of a sound absorbing body of a ceiling structure of a building according to an embodiment of the present disclosure. In the process of manufacturing a ceiling structure of a building according to an embodiment of the present disclosure, (a) is a diagram showing a state in which a sound absorber is arranged on a field edge without a ceiling plate, and (b) is (a). It is a figure which shows the state which lifted the ceiling board from the lower part from the state of (4), and was fixed to the field edge. It is a figure for defining the arrangement direction outside part of the field edge and the arrangement direction center part. It is a flow chart which shows the procedure of the construction method of the ceiling structure of the building concerning one embodiment of this indication.

  Hereinafter, the present disclosure will be described more specifically with reference to the drawings.

  FIG. 1 is a front view showing a configuration of a ceiling structure 1 of a building according to an embodiment of the present disclosure. The ceiling structure 1 of the building is composed of a beam member 2 that constitutes a frame forming a residential structure of the building, a vibration damping suspension member 5 that is fixed to the beam member 2 and hangs down from the beam member 2, and a vibration damping suspension member 5. It is provided with a field rim receiver 6 attached to the lower end portion, field rims 7 fixed to the lower surface of the field rim receiver 6 and arranged at substantially constant intervals, and a ceiling plate 3a fixed to the lower surface of the field rim 7. .. In the present embodiment, of the field edges 7, the one fixed to the wall portion 9 and arranged at the end of the field edge 7 in the arrangement direction is referred to as an edge field 7a for convenience. Further, the field edge 7 arranged at the end of the ceiling plate 3a in the direction orthogonal to the arrangement direction of the field edges 7 and fixed to the wall portion 9 is also a prominent field edge 7a. Although the building is described as having a ceiling-winning configuration in FIG. 1, it may be a wall-winning configuration.

  In the present specification, the claims and the drawings, the vertical direction of the ceiling structure 1 of the building is based on the vertical direction of FIG. 1, the side on which the floor support member 8 is arranged is upward, and the ceiling plate 3a is The side to be placed is the bottom.

  A building adopting the ceiling structure 1 according to the present embodiment is a steel structure building having a steel frame and having a plurality of layers. In the present embodiment, the building is described as having two layers as a plurality of layers, but it may have three or more layers.

  The building has a reinforced concrete foundation structure (not shown) fixed to the ground and a frame structure as a frame structure composed of members such as pillar members and beam members 2, and a residential structure structure fixed to the foundation structure. It consists of and. It should be noted that the members constituting the frame are standardized (standardized), and are manufactured in a factory in advance and then carried into a construction site and assembled. As described above, the building according to the present embodiment is preferably applied to industrialized buildings, prefabricated buildings, system buildings, and the like.

  The foundation structure is located below the frame and supports the frame. Specifically, the foundation structure is a reinforced concrete fabric foundation, and includes a footing portion and a rising portion as a foundation beam. A column base fixing portion for fixing the column base of the column member of the frame is provided at the upper end of the rising portion of the foundation structure, and the anchor bolt projects from the upper surface of the rising portion.

  The dwelling part structure of the present embodiment includes a steel frame structure composed of a plurality of column members and a plurality of beam members 2 installed between the column members, and an outer peripheral wall arranged on an outer peripheral portion of the frame structure. A partitioning body that separates the floors into an upper floor indoor space and a lower floor indoor space is provided. The frame does not necessarily have to be a steel frame.

  The outer peripheral wall includes an exterior member, a heat insulating member, and an interior member. The exterior member can be made of, for example, a panel of lightweight cellular concrete (hereinafter, referred to as “ALC or the like”. “ALC” is an abbreviation of “autoclaved light weight concrete”), and the ALC is provided around the frame. The outer layer of the outer peripheral wall can be formed by connecting a plurality of panels. The heat insulating member can be formed of, for example, a foamed resin material such as phenol foam, polystyrene foam, or urethane foam. By connecting the heat insulating member along the inner surface of the outer layer formed by the exterior member, the outer peripheral wall A heat insulating layer can be formed. Further, as the interior member, for example, gypsum board can be used, and the inner layer of the outer peripheral wall can be formed by connecting to the inside of the heat insulating layer.

  The partition body includes the floor support member 8 and the ceiling 3 shown in FIG. 1. Here, the "partition body" is a partition between the upper floor indoor space and the lower floor indoor space, and is located between the top surface of the lower floor indoor space and the floor surface of the upper floor indoor space excluding the frame. It means an aggregate of members to be processed. Therefore, in addition to the floor support member 8 and the ceiling 3 described above, the partition body includes, for example, a floor interior member such as a flooring that is stacked on the floor support member 8 and that constitutes the floor surface of the upper floor indoor space. It is a concept. And the partition body of this embodiment partitions the indoor space on the second floor as an upper indoor space and the indoor space on the first floor as a lower indoor space.

  The floor support member 8 can be composed of, for example, an ALC panel. The floor support member 8 is installed on the beam member 2 and is directly or indirectly supported by the beam member 2.

  The ceiling 3 includes a ceiling plate 3a that constitutes the ceiling surface of the lower floor indoor space, and a field edge 7 that is provided above the ceiling plate 3a and supports the ceiling plate 3a from above.

  The field edge 7 is attached to a field edge receiver 6 that is suspended and supported by a vibration-proof suspension member 5 that extends in the horizontal direction (horizontal direction in FIG. 1) and hangs down from the beam member 2 that constitutes the frame, and is substantially horizontal. , And extends in a direction perpendicular to the plane of FIG. In the present embodiment, the field edges 7 are made of square steel having a square cross-sectional shape, and are arranged at substantially regular intervals in the arrangement direction of the field edges 7 (left-right direction in FIG. 1). .. In the present embodiment, among the plurality of field edges 7, the one that is arranged at the end portion in the arrangement direction of the field edge 7 and is fixed to the wall portion 9 of the lower floor indoor space will be referred to as an edge field edge 7a. In addition to the square-shape, various steel materials such as H-shape, L-shape, I-shape, and U-shape can be used for the field edge 7. The field edge 7 may be made of wood or the like in addition to steel. The member used for the field edge 7 is preferably a member conforming to JIS A 6517 architectural steel base material (wall / ceiling).

  On the lower surface of the field edge 7, as shown in FIG. 1, a ceiling plate 3a is provided. The ceiling plate 3a is formed of, for example, a gypsum board or the like. Further, as the ceiling plate 3a, for example, a moisture permeable building material or the like may be provided.

  The anti-vibration suspension member 5 supporting the field frame receiver 6 is provided with anti-vibration rubber and has a function of suppressing the impact from the floor surface of the upper floor indoor space being transmitted to the ceiling 3 through the beam member 2. is doing.

  In the frame structure of this embodiment, a plurality of pillar members are erected on a foundation structure (not shown), and a plurality of beam members 2 are fixed between the pillar members.

  Next, the sound absorber 4 that absorbs the impact from the floor surface of the upper floor indoor space will be described in detail. As shown in FIG. 2, the sound absorbing body 4 of the present embodiment is provided by connecting a first container 4a that contains granular zeolite inside and a similar container that also contains granular zeolite and is connected to both sides of the first container 4a. And a second container 4b. The first container 4a in the center and the two second containers 4b on both sides of the first container 4a constitute one set of sound absorbing unit 4c, and the first container 4a and the second container 4b adjacent to each other in the sound absorbing unit 4c. Are connected to each other via a bent portion 4d. In the present embodiment, the bent portion 4d is a portion where the first container 4a and the second container 4b are not provided, but a part of the first container 4a or the second container 4b constitutes the bent portion 4d. Good. The first container 4a and the second container 4b can be bent at a bent portion 4d around an axis perpendicular to the paper surface of FIG. 2 (b). FIG. 2 shows a mode in which the above-described sound absorbing body units 4c are further connected in the array direction of the field edge 7. In FIG. 2, the second containers 4b at the ends of the sound absorbing body unit 4c are also connected to each other via the bent portion 4d. In addition, it is preferable that the first container 4a and the second container 4b be formed in a bag shape from a flexible sheet-shaped material from the viewpoint of sound absorbing performance. Moreover, it is preferable that the first container 4a and the second container 4b have air permeability. In the present embodiment, the first container 4a and the second container 4b are made of a material in which a non-woven fabric and a resin sheet are partially stuck together, but it is also possible to use various other materials.

  Zeolites are hydrous aluminosilicates containing alkali or alkaline earth metals that consist of a rigid anionic skeleton with regular channels (tubular pores) and cavities. Zeolite is a granular material that is used as an absorbent interior material, a soil improving material, and a filtering material to adsorb humidity and odor, and is a nonflammable material because it is an inorganic mineral.

  The sound absorber 4 containing zeolite is placed on the ceiling plate 3a as shown in FIG. More specifically, the first container 4a of the sound absorbing body unit 4c is arranged so as to contact the upper surface of each field edge 7. Further, the second container 4b of the sound absorbing body unit 4c is arranged so as to abut on the upper surface of the ceiling plate 3a adjacent to each field edge 7. In the sound absorbing body 4, the first container 4a is arranged on the upper surface of the field edge 7, and the second container 4b of the second container 4b which is not connected to the other sound absorbing body unit 4c hangs downward from the side of the field edge 7. State (see FIG. 3 (a)), the ceiling plate 3 a is lifted from below to be fixed to the lower surface of the field edge 7, and the second container 4 b that has hung down is in contact with the upper surface of the ceiling plate 3 a. (See FIG. 3B). By adopting such a construction procedure, as compared with the conventional procedure of fixing the ceiling plate to the field edge 7 and then disposing the sound absorber 4 on the ceiling plate, the worker works above the ceiling plate. There is no need to do so, and construction efficiency is improved.

  In order to improve the workability of the ceiling board 3a, the ceiling board 3a may be installed after connecting the ends of the sound absorbing body units 4c to each other. As a connecting method in that case, various methods such as providing an engaging portion at an end portion of the sound absorbing body unit 4c or bonding the end portions to each other can be used.

  In the present embodiment, as can be understood from the comparison between FIG. 3 (a) and FIG. 3 (b), the second container 4 b hanging from the side of the field rim 7 when the ceiling plate 3 a is not installed is The pitch between the field edges 7 and the length of each of the containers 4a, 4b are set so that the ends of the hanging second container 4b are pushed up together with the ceiling plate 3a when the plate 3a is installed, and the ends of the hanging second container 4b come into close contact with each other. .. With such a configuration, the sound absorbing body 4 is spread over at least the central portion of the ceiling plate 3a without any gap. In addition, in this embodiment, as shown in FIG. 3B, the second containers 4b are connected to each other to such an extent that there is no gap between the second container 4b and the ceiling plate 3a in a region where the ends of the second container 4b contact each other. Are closely attached.

  In the state of FIG. 3B, an impact is applied to the floor surface of the upper indoor space, and the ceiling board is passed through the floor support member 8, the beam member 2, the antivibration suspension member 5, the field edge receiver 6 and the field edge 7 of FIG. Even if the vibrations are transmitted to 3a, the vibrations are absorbed in the zeolite channels and cavities by vibrating the field edge 7 and the sound absorber 4 installed on the upper surface of the ceiling panel 3a, and the vibrations of the ceiling panel 3a and the field edge 7 are absorbed. Vibration can be suppressed.

  The sound absorbing unit 4c may be formed by individually completing the first container 4a and the second container 4b containing zeolite and then connecting them by means such as adhesion, or by pressing one elongated container. Alternatively, the sound absorbing body unit 4c having the bent portion 4d may be formed by dividing the storage space into a plurality of storage spaces by means such as welding or stitching and storing the zeolite in each of the divided storage spaces.

  In the present embodiment, the zeolite is used as the powder, but the present invention is not limited to this mode. For example, perlite, natural glass foam, sand, or another mixture of at least two of them. You may make it use a granular body.

  Further, the sizes of the first container 4a and the second container 4b do not necessarily have to be the same, and can be set arbitrarily. For example, in order to enhance the effect of suppressing the vibration in the field edge 7, the length of the first container 4a in the longitudinal direction is made relatively long, or the volume of the granular body of the first container 4a is made relatively large. Good. Further, in order to enhance the effect of suppressing the vibration in the ceiling plate 3a, the length of the second container 4b in the longitudinal direction is relatively increased, or the volume of the granular body of the second container 4b is relatively increased. Good.

  In the present embodiment, in principle, the first container 4a is arranged on the field edge 7 and the second container 4b is arranged on the ceiling plate 3a. However, for example, the field edge 7 (remarkable edge field 7a) A part of the second container 4b may be arranged on top of the first container 4a. In addition, one first container 4a may be configured to be partially arranged on the two field margins 7 (remarkable field margin 7a).

  In the present embodiment, three sound absorbing body units 4c are connected in the arrangement direction of the field edge 7 to form the sound absorbing body 4 (see FIG. 2). As a result, the three first containers 4a provided independently in the longitudinal direction of the sound absorbing body 4 are supported by the three rims 7, respectively, so that the ceiling board 3a is not installed in FIG. Even in such a construction process, the sound absorbing body 4 is stably supported by the three field edges 7. Therefore, a trouble such as the sound absorbing body 4 falling off the field edge 7 is unlikely to occur at the time of construction, so that the construction efficiency of the ceiling structure 1 of the building can be improved. Even when two sound absorbing body units 4c are connected in the arrangement direction of the field edge 7, two independent first container 4a portions of the sound absorbing body 4 can be supported by the two field edges 7, so that the ceiling Even in the construction process as shown in FIG. 3A where the plate 3a is not installed, the sound absorbing body 4 is relatively stably supported by the two field edges 7. Therefore, since the sound absorber 4 does not easily fall off the field edge 7 during construction, the construction efficiency of the ceiling structure 1 of the building can be improved. The sound absorbing body 4 may be composed of one sound absorbing body unit 4c, or may be composed of four or more sound absorbing body units 4c. Further, the sound absorbing body 4 does not necessarily have to be configured to be an integral multiple of the sound absorbing body unit 4c, and the first container 4a or the second container 4b which is a part of the sound absorbing body unit 4c is provided at the end of the sound absorbing body unit 4c. It may be added.

  In the present embodiment, the sound absorber 4 is fixed to the wall portion 9 of the field edge 7 and arranged at the end of the field edge 7 in the arrangement direction, as shown in a position to the left of the center in the left-right direction of FIG. 1. It is configured so as not to be arranged on the front edge 7a and on the single front edge 7 adjacent to the front edge 7a. With such a configuration, when the construction worker of the ceiling 3 attaches the ceiling plate 3a to the field edge 7, the weight of the sound absorbing body 4 is not applied to the end portion of the ceiling plate 3a in the arrangement direction of the field edge 7, so that the operator It becomes easy to position the peripheral portion of the ceiling plate 3a with respect to the front edge 7a. Furthermore, when the ceiling board 3a is attached to the field edge 7, it is unlikely that the hanging sound absorber 4 is mistakenly sandwiched between the ceiling board 3a and the field edge 7a. In this way, the construction efficiency of the ceiling structure 1 of the building can be improved.

  In this embodiment, the sound absorber 4 is not placed on the border 7a and one border 7 adjacent to the border 7a, but the present invention is not limited to this mode. The sound absorbing body 4 may be configured not to be placed on the front edge 7a and the two or more front edges 7 adjacent to the front edge 7a. It should be noted that the sound absorbing body 4 may be partially mounted on the border 7a and the border 7 adjacent to the border 7a. Even if the sound absorbing body 4 is not placed on at least one of the outer edge 7a and at least one adjacent edge 7 of the outer edge 7a at both ends in the arrangement direction of the edge 7, the ceiling board 3a can be easily positioned, and the construction efficiency of the ceiling structure 1 of the building can be improved.

  As a result of diligent study by the inventor of the present application, when the sound absorbing body 4 is not placed on the edge 7a and the edge 7 adjacent to the edge 7a (the sound absorber 4 is placed on the other edge 7). However, it was confirmed that the impact sound from the floor surface of the indoor space on the upper floor can be suppressed to a predetermined level. More specifically, even when the sound absorbing body 4 is not placed on the front edge 7a and the two front edges 7 adjacent to the front edge 7a, the performance of blocking the heavy floor impact sound is evaluated (measurement method: JIS A 1418-2: 2000, evaluation method of sound insulation performance: JIS A 1419-2: 2000), good insulation performance could be obtained as compared with a normal steel frame building. The reason why such a good result is obtained is that the ceiling board 3a is supported by the front edge 7a and the wall portion 9 to which the front edge 7a is fixed in the vicinity of the front edge 7a of the ceiling board 3a. Therefore, even when a shock is applied from the floor surface of the upper floor indoor space, the vicinity of the front edge 7a of the ceiling plate 3a and the front edge 7a itself do not vibrate significantly. On the other hand, in the area away from the front edge 7a (for example, the central portion 3c in the arrangement direction of the edge 7 in FIG. 4), since the effect of being supported by the wall portion 9 and the like is small, the impact from the floor surface of the upper floor indoor space is small. Vibration due to is not sufficiently suppressed depending on the structure of the building. Therefore, by placing the sound absorbing body 4 in these areas, it is possible to effectively absorb the impact from the floor surface of the upper indoor space.

  According to the results of the study by the inventor of the present application, it was confirmed that the configuration of the present embodiment can improve not only the heavy floor impact sound but also the upper and lower floor sound insulation performance.

  FIG. 4 is a view of a region of the ceiling 3 surrounded by the front edge 7a on four sides, as viewed from below. As shown in FIG. 4, when the end of the ceiling board 3a along the array direction of the field edge 7 to the center is divided into an array direction outer portion 3e of the field edge 7 and an array direction central portion 3c (FIG. 4). The length a shown in Fig. 1 is one length when divided in two), and the ratio of the laying area of the sound absorber 4 to the field edge 7 and the ceiling board 3a in the array direction central portion 3c rather than the array direction outer side portion 3e of the field edge 7. Should be configured to be high. As a result, a larger amount of zeolite can be placed on the central portion 3c of the field edge 7 in the arrangement direction, which has a great effect of suppressing vibration by laying the sound absorbing body 4. As a result, it is possible to suppress the amount of zeolite placed in the vicinity of the edge 7a of the ceiling plate 3a, facilitate positioning of the ceiling plate 3a, improve the construction efficiency, and maintain a desired vibration suppressing effect.

  In order to increase the ratio of the installation area of the sound absorber 4 to the field edge 7 and the ceiling plate 3a in the array direction central portion 3c of the field edge 7 in the array direction outer side 3e, the edge field edge 7a The sound absorbing body 4 may not be placed on at least one field edge 7 adjacent to the edge field edge 7a, and the sound absorbing body 4 may be placed on the entire area or almost all of the other areas. Further, the laying ratio of the sound absorbing body 4 may be gradually increased from the outer side portion 3e in the arrangement direction of the field edge 7 toward the central portion 3c in the arrangement direction.

  The sound absorber 4 may be laid at a higher ratio in the central portion than in the end portion in the direction orthogonal to the arrangement direction of the field edges 7 (the vertical direction in FIG. 4). This is because, for example, in the gap area (the gap area smaller than the vertical length of the sound absorbing body 4 in FIG. 2A) where the sound absorbing body 4 could not be placed, in the vertical end portion of FIG. This can be realized by overlapping 4 and not mounting them by making them small or processing them small. By providing the region where the sound absorber 4 is not placed in the direction orthogonal to the arrangement direction of the field edges 7 as described above, the usage amount and the amount of waste material of the sound absorber 4 can be suppressed.

  In addition, the inventor of the present application, the floor of the frame, the beam, the wall is heavy and hard reinforced concrete structure (RC structure), the frame guarantees the floor impact sound performance, the ceiling surface for hiding the equipment pipe is most Since it is easy to vibrate, the damping effect can be exhibited by arranging granules on the ceiling surface, but in steel frame construction, floor ALC, structural beams, columns, interior materials, etc. all vibrate, so comprehensive measures must be taken. I thought it was essential. However, as a result of the above-described examination, it was found that even in a steel building, a desired vibration damping effect can be obtained by disposing the sound absorbing body 4 on the ceiling plate 3a and the field edge 7.

  Next, a method of constructing the ceiling structure 1 of the building of the present embodiment will be described using a flowchart (FIG. 5) showing the procedure.

  The worker who manufactures the ceiling structure 1 of the building installs a plurality of field rims 7 below the beam members 2 forming the frame (step S101). Here, the beam member 2 functions as an upper structure that supports the ceiling 3 from above. When installing the field edge 7, the worker first attaches the antivibration suspension member 5 to the lower end portion of the beam member 2 formed of H-shaped steel. The antivibration suspension members 5 are provided at a plurality of locations along the longitudinal direction of the beam member 2 as shown in FIG. Next, the field edge receiver 6 is fixed to the lower end of the vibration-proof suspension member 5. In the present embodiment, the field receiver 6 is also made of steel, and is arranged substantially parallel to the beam member 2 by the plurality of vibration damping suspension members 5 described above. At least two field rim receivers 6 are arranged at intervals in the direction perpendicular to the plane of the paper of FIG. Then, the field edge 7 is fixed so as to bridge at least two field edge supports 6.

  When the installation of the field edge 7 is completed, the worker arranges the sound absorbing body 4 so as to straddle the plurality of field edges 7 (step S103). As described above, the sound absorbing body 4 according to the present embodiment has three sound absorbing body units 4c including one first container 4a and two second containers 4b, as shown in FIGS. 2 (a) and 2 (b). It has a structure in which two containers are connected, and has nine containers 4a and 4b in total. When the sound absorbing body 4 having such a configuration is arranged so as to straddle at least two field rims 7 (three in the example of FIGS. 3A and 3B), the sound absorbing body extending in the arrangement direction of the field rims 7 is arranged. 4 are supported by at least two field edges 7 spaced in the same direction. Therefore, as shown in FIG. 3A, even when the ceiling board 3a is not installed in the process of constructing the ceiling structure 1 of the building, the number of the sound absorbers 4 hanging between the field edges 7 is reduced, The sound absorbing body 4 can be stably supported only by 7. Therefore, it is possible to suppress the trouble that the sound absorbing body 4 slips down from the field edge 7 during construction.

  After arranging the sound absorbing body 4, the worker fixes the ceiling plate 3a to the field edge 7 from below (step S105). In this step, after the ceiling board 3a is aligned with the field edge 7 in the in-plane direction, the ceiling board 3a is gradually brought closer to the field edge 7 from below as shown in FIG. The ceiling plate 3a first comes into contact with the second container 4b at the end of the sound absorbing body 4 hanging from the field edge 7. The operator further lifts the ceiling plate 3a upward together with the hanging second container 4b, and when the ceiling plate 3a contacts the lower surface of the field edge 7 as shown in FIG. Connect and fix.

  As described above, in the present embodiment, the upper structure (beam member 2), the ceiling 3 provided below the upper structure and having the ceiling board 3a and the field edge 7, and the ceiling 3 are mounted on the ceiling 3. The sound absorbing body 4 includes a sound absorbing body 4, and the sound absorbing body 4 has a granular body and a plurality of containers that accommodate the granular body and are connected in the arrangement direction of the field edge 7, and are arranged so as to straddle the plurality of field edges 7. Therefore, the arranging region has a higher proportion in the arrangement direction central portion 3c than in the arrangement direction outer portion 3e of the field edge 7. By adopting such a configuration, the sound absorbing body 4 is supported by the plurality of field edges 7 arranged at a distance in the arrangement direction of the field edges 7, so that the sound absorbing body 4 is formed by the plurality of field edges 7. In addition to being stably supported by, it is possible to reduce the number of sound absorbers 4 hanging downward between the field edges 7. Therefore, when the step of pushing up the ceiling plate 3a from the bottom after the sound absorbing body 4 is placed so as to straddle the field edge 7, the hanging sound absorbing body 4 is unlikely to hinder the construction. Therefore, the ceiling board 3a can be easily pushed up and fixed to the field edge 7. Therefore, after installing the ceiling as in Patent Document 1, it is not necessary for the worker to move to a position above the ceiling to perform the work, and the construction efficiency of the ceiling structure 1 of the building can be improved. In addition, since the granular material is housed in a plurality of containers, the uneven distribution of the granular material (for example, the position on the field edge 7 is “sparse” and the positions on the ceiling boards 3a on both sides thereof are “dense”). It is possible to suppress such uneven distribution of the granular bodies and suppress uneven distribution of the effect of suppressing vibration.

  In addition, by arranging the sound absorbing body 4 so that the proportion of the laying area of the sound absorbing body 4 is higher in the arrangement direction central portion 3c than in the arranging direction outer side portion 3e, the vibration suppressing effect by the sound absorbing body 4 is large. More zeolite can be placed on the central portion 3c of the field edge 7 in the arrangement direction. Therefore, the desired vibration suppressing effect can be maintained while suppressing the amount of zeolite placed near the edge 7a of the ceiling plate 3a, facilitating the positioning of the ceiling plate 3a, etc., and improving the construction efficiency.

  Further, in the present embodiment, the plurality of containers are the first container 4a arranged on the adjacent field edge 7 and the second container 4b arranged on the ceiling plate 3a by connecting the first containers 4a to each other. It is configured to have and. By adopting such a configuration, since the first container 4a arranged on the field edge 7 and the second container 4b arranged on the ceiling plate 3a have respective individual granular body accommodating spaces, Even if the first container 4a and the second container 4b are respectively arranged on the field edge 7 and the ceiling plate 3a, the granular body does not move from the first container 4a toward the second container 4b, The uneven distribution of the granular material can be suppressed. Therefore, both the vibration of the field edge 7 and the vibration of the ceiling plate 3a can be suppressed in a balanced manner.

  Further, in the present embodiment, the upper structure is configured to be the beam member 2 of the steel frame structure. By adopting such a configuration, the sound absorbing body 4 can effectively absorb and suppress the impact sound from the upper floor through the floor support member 8 supported by the beam member 2.

  In addition, in the present embodiment, the upper structure, the ceiling 3 provided below the upper structure and having the ceiling plate 3a and the field edge 7, and the sound absorber 4 mounted on the ceiling 3 are provided. Reference numeral 4 has a granular body and a plurality of containers that accommodate the granular body and are connected in the arrangement direction of the field edge 7 and are arranged at at least one end of the field edge 7 in the arrangement direction. 7a and the one or more field edges 7 adjacent to the edge field 7a, and is arranged so as to straddle a plurality of field edges. By adopting such a configuration, the sound absorber 4 is not placed on the field edge 7a at least at one end in the array direction of the field edge 7 and one or more field edges 7 adjacent thereto. Therefore, when the construction worker of the ceiling 3 attaches the ceiling plate 3a to the field edge 7, the hanging sound absorber 4 does not hide the field edge 7a. Therefore, the operator can easily position the peripheral edge portion of the ceiling plate 3a with respect to the front edge 7a. Furthermore, when the ceiling board 3a is attached to the field edge 7, it is unlikely that the hanging sound absorber 4 is mistakenly sandwiched between the ceiling board 3a and the field edge 7a. In this way, the construction efficiency of the ceiling structure 1 of the building can be improved.

  In addition, the present embodiment relates to a building including an upper structure, a ceiling 3 provided below the upper structure and having a ceiling plate 3a and a field edge 7, and a sound absorber 4 mounted on the ceiling 3. In the construction method of the ceiling structure 1, the sound absorbing body 4 has a granular body and a plurality of containers that accommodate the granular body and are connected in the arrangement direction of the field edge 7, and straddle the plurality of field edges 7. The step of installing the field edge 7, the step of installing the sound absorber 4 so as to straddle a plurality of field edges 7 after installing the field edge 7, and the step of installing the sound absorber 4 from below The step of connecting the ceiling board 3a to the field edge 7 is included. By adopting such a configuration, it is not necessary for an operator to move to a position above the ceiling to perform work after installing the ceiling as in Patent Document 1, and to improve the workability of the ceiling structure 1 of the building. You can Further, since the sound absorbing body 4 is supported by the plurality of field edges 7 arranged at a distance in the arrangement direction of the field edge 7, the sound absorbing body 4 is stably supported by the plurality of field edges 7. Besides, it is possible to reduce the number of the sound absorbers 4 hanging downward between the field edges 7. Therefore, when the step of pushing up the ceiling plate 3a from the bottom after the sound absorbing body 4 is placed so as to straddle the field edge 7, the hanging sound absorbing body 4 is unlikely to hinder the construction. Therefore, the ceiling board 3a can be easily pushed up and fixed to the field edge 7.

  Although the present disclosure has been described based on the drawings and the embodiments, it should be noted that those skilled in the art can easily make various variations or modifications based on the present disclosure. Therefore, it should be noted that these variations or modifications are included in the scope of the present invention. For example, the functions and the like included in each component can be rearranged so as not to logically contradict each other, and a plurality of components can be combined into one or divided.

  For example, in the present embodiment, the beam member 2 and the field edge 7 are configured to be connected via the vibration-proof suspension member 5 and the field edge receiver 6, but the embodiment is not limited to such an aspect. The connecting member of the part may be omitted or replaced with another connecting member.

  Further, in the present embodiment, one first container 4a is arranged on the field edge 7, and the second containers 4b on both sides of the first container 4a are arranged on the ceiling plate 3a. It is not limited to this aspect. The containers 4a and 4b may be finely divided so that two or more first containers 4a are arranged on the field edge 7.

  Further, in the present embodiment, the two first containers 4a are configured to be connected via the two second containers 4b, but the present invention is not limited to this mode, and the two first containers 4a are connected to each other. You may make it connect via the 2nd container 4b.

1 Building ceiling structure 2 Beam members (upper structure)
3 Ceiling 3a Ceiling board 3c Central part in the arrangement direction of the field edge 3e Outside part in the arrangement direction of the field edge 4 Sound absorber 4a First container 4b Second container 4c Sound absorber unit 4d Bending part 5 Vibration damping suspension member 7 Field edge 7a Edge 8 Floor support member 9 Wall

Claims (5)

An upper structure,
A ceiling provided below the upper structure and having a ceiling plate and a field edge;
A sound absorber mounted on the ceiling,
The sound absorber is
Granular material,
It has a plurality of containers for accommodating the granular bodies and connected in the arrangement direction of the field edge, and is arranged so as to straddle the plurality of field edges, and the central portion in the arrangement direction rather than the outer side portion of the field edge in the arrangement direction. Has a higher proportion of the laying area, which is the ceiling structure of the building. The plurality of containers are first containers arranged on adjacent field edges,
The ceiling structure of the building according to claim 1, further comprising a second container that connects the first containers to each other and is arranged on the ceiling plate.   The ceiling structure for a building according to claim 1, wherein the upper structure is a beam of a steel frame structure. An upper structure,
A ceiling provided below the upper structure and having a ceiling plate and a field edge;
A sound absorber mounted on the ceiling,
The sound absorber is
Granular material,
A plurality of containers for accommodating the granular body and having a plurality of containers connected in the arrangement direction of the field edge are provided, and the field edge arranged at at least one end in the direction of the field edge and adjacent to the field edge. A ceiling structure of a building, which is arranged so as to straddle a plurality of fields, excluding one or more fields. An upper structure,
A ceiling provided below the upper structure and having a ceiling plate and a field edge;
A method for constructing a ceiling structure of a building comprising a sound absorber mounted on the ceiling,
The sound absorber is
Granular material,
The granular body is housed and has a plurality of containers connected in the arrangement direction of the field edge, and is arranged so as to straddle the plurality of field edges,
The step of setting up a field
Arranging the sound absorbing body so as to straddle a plurality of fields after setting the fields,
Fixing the ceiling plate to the field edge from below after disposing the sound absorbing body, the method of constructing a ceiling structure of a building.

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