JP7437547B1 - ceiling structure - Google Patents

Abstract

An object of the present invention is to provide a ceiling structure in which the position of a sound absorbing material can be easily changed in accordance with the change in the position of a partition wall, and which can be easily constructed without polluting the construction site. A ceiling structure C provided above a partition wall includes a ceiling base 5 and a plurality of rectangular plate-shaped ceiling materials 10. A sound absorbing material 20 is provided above a plurality of ceiling materials 10 provided within a predetermined distance range from the partition wall PW in association with each ceiling material 10 . Each sound absorbing material 20 is constituted by a rectangular plate-shaped body having elasticity, and has a space S between it and the corresponding ceiling material 10 inside the two bar materials 6, 6 on which the corresponding ceiling material 10 is placed. The center between the predetermined two side portions 20s is above both ends so that the two opposing predetermined side portions 20s are pressed against the two bar materials 6 by elastic restoring force. It is bent so that it is located at [Selection diagram] Figure 2

Description

The present invention relates to a ceiling structure provided above a partition wall.

In office buildings and the like, partition walls are often constructed after the ceiling is constructed. In such cases, the partition wall is constructed between the floor and the ceiling, and is not installed all the way to the ceiling. Therefore, even if the sound insulation performance of the partition wall is high, the sound generated in one of the two rooms separated by the partition wall is transmitted to the other through the attic, reducing the sound insulation performance between the two rooms. Ta.

Therefore, it has conventionally been proposed to improve the sound insulation performance between two rooms by providing a sound absorbing material such as glass wool in the attic above the partition wall (see, for example, Patent Document 1 below).

In Patent Document 1, by providing a plate-shaped sound-absorbing material on the crosspiece of the ceiling base above the partition wall, the sound-absorbing material absorbs the sound generated in one of the two rooms partitioned by the partition wall and transmitted to the attic. By attenuating the sound, it is difficult for the sound to travel to the other room.

Patent No. 4353128

By the way, in Patent Document 1, a sound absorbing material is installed before the construction of the ceiling board, and by using a large plate-shaped sound absorbing material and spanning multiple crosspieces of the ceiling base, the ceiling board is installed. This prevents the sound-absorbing material from falling during the process.

However, in Patent Document 1, no consideration is given to changing the installation position of the sound-absorbing material after constructing the ceiling structure, and since the sound-absorbing material is so large that it spans multiple crosspieces, the position of the partition wall is changed. There was a problem in that the position of the sound absorbing material could not be easily changed according to the situation. Furthermore, there is also the problem that when glass wool is cut to a desired size to form a sound absorbing material at a construction site, trash is generated, polluting the construction site.

The present invention has been made in view of the above, and its purpose is to provide a ceiling that allows the position of the sound absorbing material to be easily changed in accordance with the change of the position of the partition wall, and that can be easily constructed without contaminating the construction site. It's about providing structure.

In order to achieve the above object, the present invention employs a system ceiling structure as the ceiling structure above the partition wall, and also installs sound absorbing materials above a plurality of ceiling materials within a predetermined distance range from the partition wall. We decided to install it to match the ceiling material.

Specifically, the first invention is based on a ceiling structure provided above a partition wall.

The first invention provides a ceiling base in which bar materials suspended from a ceiling slab are assembled in a parallel or lattice shape, and lower ends protruding inward of two bar materials arranged in parallel on the ceiling base. a plurality of rectangular plate-shaped ceiling materials on which two sides are placed, and a sound absorbing material is provided above the plurality of ceiling materials provided within a predetermined distance range from the partition wall. Each of the sound-absorbing materials is provided in correspondence with each of the ceiling materials, and each of the sound-absorbing materials is constituted by an elastic rectangular plate-like body. It is arranged so as to form a space between it and the ceiling material, and between the two predetermined sides such that the two opposing predetermined sides are pressed against the two bar materials by elastic restoring force. It is characterized by being bent so that the center is located above both ends.

In the first invention, a system ceiling structure is adopted as the ceiling structure above the partition wall, and sound absorbing material is provided above a plurality of ceiling materials within a predetermined distance range from the partition wall in association with each ceiling material. It is said that According to such a ceiling structure, in the attic above the partition wall, a plurality of sound absorbing materials are provided on both sides near the boundary between the two rooms partitioned by the partition wall and the adjacent room. Therefore, the sound that is generated in one of the two rooms partitioned by the partition wall and transmitted to the attic can be attenuated by the sound absorbing material, making it difficult for the sound to be transmitted to the other room. In addition, the above ceiling structure adopts a system ceiling structure in which all ceiling materials are removable, and each sound absorbing material is associated with the ceiling material, and between the two bar materials on which the corresponding ceiling material is placed. I'm trying to place it. According to such a configuration, since the sound absorbing material is configured to have the same size as the ceiling material for the system ceiling, the sound absorbing material can be easily attached and removed in the same way as the ceiling material. That is, according to the ceiling structure, the position of the sound absorbing material can be easily changed, so when changing the position of the partition wall, the position of the sound absorbing material can also be easily changed.

Further, in the first invention, each sound absorbing material is arranged between two bar materials on which the corresponding ceiling material is placed so as to form a space between the sound absorbing material and the ceiling material. According to this configuration, sound generated in one of the two rooms separated by a partition wall and transmitted to the ceiling can be heard not only through the sound-absorbing material but also through the space formed between the sound-absorbing material and the ceiling material. However, because it is attenuated, it becomes more difficult for the light to be transmitted to the other chamber. In other words, the sound insulation performance between the two rooms separated by the partition wall is improved.

Further, in the first invention, each sound absorbing material is constituted by a rectangular plate-like body having elasticity, and the sound absorbing material is configured such that the two opposing sides of the sound absorbing material are pressed against the corresponding bar material by the elastic restoring force. The material is bent and placed inside the rectangular frame. According to such a configuration, the sound absorbing material can be held in a state where at least a portion thereof is lifted from the ceiling material to form a space, without using a separate support member or the like. Furthermore, according to the first invention, the size of the sound absorbing material is determined according to the size of the ceiling material, so it can be cut to a predetermined size at a factory or the like. In other words, according to the first invention, there is no need to cut the sound absorbing material such as glass wool into a desired size at the construction site, and there is no possibility that trash will be generated during construction and pollute the construction site.

As described above, according to the first invention, it is possible to easily change the position of the sound absorbing material according to the change in the position of the partition wall, and to provide a ceiling structure that can be easily constructed without polluting the construction site. I can do it.

A second invention is characterized in that, in the first invention, each of the sound absorbing materials is arranged in such a direction that the two predetermined sides thereof are parallel to the partition wall.

In the second invention, each sound absorbing material is arranged in such a direction that the predetermined two sides thereof are parallel to the partition wall. According to such a configuration, not only the upper part of the space formed between each sound absorbing material and each ceiling material, but also the sides on the partition wall side are covered with the sound absorbing material. In addition, the predetermined two side portions of each sound absorbing material parallel to the partition wall are pressed against the corresponding bar material, so that the sides of the space are closed without any gaps. Therefore, the sound generated in one of the two rooms separated by the partition wall and transmitted to the attic becomes more difficult to be transmitted to the other room.

A third aspect of the invention is that in the first or second aspect, a lower surface of the rectangular plate-like body constituting each of the sound absorbing materials is provided between the two predetermined sides and parallel to the two predetermined sides. Two grooves each having a V-shaped cross section are formed, and each sound absorbing material has a shielding portion between the two grooves and a shielding portion between the two grooves and the predetermined two sides and two legs between the shielding part and the legs, and the shielding part is bent so that the angle between the shielding part and each of the legs is greater than 90 degrees and smaller than the angle obtained by subtracting the angle of the groove from 180 degrees. It is characterized by the presence of

A fourth invention is based on the first or second invention, wherein a lower surface of the rectangular plate-like body constituting each of the sound absorbing materials is provided between the two predetermined sides and parallel to the two predetermined sides. Two cut grooves are formed with a depth reaching near the upper surface of the rectangular plate-shaped body, and each of the sound absorbing materials has a shielding portion between the two cut grooves. , divided into two legs between the two cut grooves and the two predetermined sides, and the angle between the shielding part and each leg is greater than 90 degrees and smaller than 180 degrees. It is characterized by being bent.

In the third and fourth inventions, two V-shaped grooves or cut grooves are formed on the lower surface of the rectangular plate-like body constituting each sound absorbing material. Such a configuration facilitates the work of bending the sound absorbing material when installing the sound absorbing material at a construction site. Therefore, according to the third and fourth inventions, it is possible to more easily install and change the position of the sound absorbing material.

A fifth invention is characterized in that in the first or second invention, each of the sound absorbing materials is curved so that the center between the two predetermined sides is the highest.

According to the fifth invention, the sound-absorbing material can be easily constructed by simply preparing a rectangular plate-like sound-absorbing material and installing it in a curved manner at the construction site.

As explained above, according to the present invention, a system ceiling structure is adopted as a ceiling structure above a partition wall, and a sound absorbing material is applied to each ceiling material above a plurality of ceiling materials within a predetermined distance range from the partition wall. Since they are provided in correspondence, the position of the sound absorbing material can be easily changed in accordance with the change in the position of the partition wall, and a ceiling structure that can be easily constructed without polluting the construction site can be provided.

FIG. 1 is a perspective view of the ceiling structure according to the first embodiment, viewed from above. FIG. 2 is a cross-sectional view of the ceiling structure of FIG. 1 in a direction perpendicular to the partition wall. FIG. 3 is a sectional view taken along the line III--III in FIG. 2. FIG. 4 is an enlarged view of the vicinity of the bar material in FIG. 2. FIG. 5 is an explanatory diagram showing how the sound absorbing material is bent. FIG. 6 is an explanatory diagram showing how the sound absorbing material of Embodiment 2 is bent. FIG. 7 is a diagram corresponding to FIG. 4 in the ceiling structure of the second embodiment. FIG. 8 is an explanatory diagram showing how the sound absorbing material of Embodiment 3 is bent. FIG. 9 is a diagram corresponding to FIG. 4 in the ceiling structure of the third embodiment. FIG. 10 is a perspective view of another embodiment of the ceiling structure seen from above.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of the embodiments is merely illustrative in nature and is in no way intended to limit the present invention, its applications, or its uses.

《Embodiment 1 of the invention》
-Ceiling structure composition-
1 to 3 are diagrams showing a ceiling structure C provided above a partition wall PW according to Embodiment 1 of the present invention. The ceiling structure C employs a so-called system ceiling structure. The lower part of the ceiling structure C is divided into two rooms R1 and R2 by a partition wall PW. In the following, for convenience of explanation, the left side, right side, upper side, lower side, front side of the page, and back side of the page in FIG. 2 will be referred to as "left,""right,""top,""bottom," and "front," respectively. , will be explained as "later".

As shown in FIGS. 1 to 3, the ceiling structure C includes a ceiling base 5, a plurality of ceiling materials 10, . . . , 10, and a plurality of sound absorbing materials 20, . In the figure, 1 is a ceiling slab that constitutes the indoor ceiling of the building, 2 is a hanging bolt whose upper end is embedded in the ceiling slab 1 and fixed, and 3 is a nut 4, 4 attached to the lower end of the hanging bolt 2. This is a hanger attached by.

The ceiling base 5 is made by assembling a plurality of bar materials 6, ..., 6 in a lattice shape, and is suspended from the ceiling slab 1 by attaching the plurality of bar materials 6, ..., 6 to the lower end of the hanger 3. It is suspended by bolts 2 and hangers 3.

As shown in FIG. 4, each bar member 6 is made of metal and has a T-shaped cross section. Each bar member 6 includes a fixing portion 6a, a connecting portion 6b, and a pair of locking portions 6c, 6c. The fixing part 6a is located at the upper end of the bar material 6 and is formed into a rectangular cylindrical shape. The connecting portion 6b is a plate-shaped portion extending downward from the lower end of the fixed portion 6a. The pair of locking portions 6c, 6c are continuous with the lower end of the connecting portion 6b and extend horizontally away from each other. Each bar material 6 has a fixing part 6a attached to the lower end of the hanger 3, and a connecting part 6b and a pair of locking parts 6c, 6c form a T-shaped cross section, and the T-shape is in the opposite direction. It is hung in an upright position.

The plurality of bar materials 6, . . . , 6 are arranged in the front-rear direction (horizontal vertical direction) and the left-right direction (horizontal lateral direction) and assembled in a lattice shape in plan view, and these bar materials 6, . A flush ceiling base 5 is constructed. A plurality of rectangular frame portions 8, . . . , 8 are formed on the ceiling base 5 by four bar materials 6, 6, 6, 6, respectively. Ceiling equipment (not shown) such as lighting fixtures and air conditioners are fixedly supported in some of the plurality of rectangular frames 8,...,8, and the remaining rectangular frames 8,...,8 are each fixedly supported. The ceiling materials 10, . . . , 10 are supported in a suspended state at their respective peripheral portions. The ceiling equipment and ceiling materials 10, . . . , 10 supported by the plurality of rectangular frames 8, . . . , 8 form a grid ceiling surface.

As shown in FIGS. 2 and 4, each ceiling material 10 is made of rock wool material with a size corresponding to the size of the rectangular frame portion 8 (for example, 600×600 mm). Note that the size and material of the ceiling material 10 are not particularly limited, and may be any size and material.

At the lower corner of each of the four peripheral parts of each ceiling material 10, a stepped notch 10a is formed by cutting out the corner with a rectangular cross section. The ceiling material 10 is placed on the bar material 6 by placing the lower surface of each cutout stepped portion 10a on the upper surface of the locking portions 6c of the four bar materials 6 constituting the rectangular frame portion 8. It is supported by the bar material 6.

As shown in FIGS. 1 and 2, the plurality of sound absorbing materials 20,..., 20 are provided one each inside the rectangular frame portions 8,..., 8 within a predetermined distance range from the partition wall PW. . That is, one sound-absorbing material 20 is provided above the plurality of ceiling materials 10, . In the first embodiment, the predetermined distance is set to, for example, 950 mm. In the first embodiment, the upper end of the partition wall PW is fixed to the bar member 6 extending in the front-rear direction, and one side of the rectangular frame portion 8 is approximately 640 mm. Therefore, as shown in FIGS. 1 and 2, within a range of 950 mm from the partition wall PW, there are two rows of rectangular frame portions 8, . 8 is included. That is, in the first embodiment, the range of 950 mm from the partition wall PW includes one ceiling material 10 on each of the left and right sides of the partition wall PW, and correspondingly, the sound absorbing material 20 is placed on the left and right sides of the partition wall PW. One will be provided on each side.

The sound-absorbing material 20 is constituted by a rectangular plate-like body that has sound-absorbing properties and elasticity. In the first embodiment, the sound absorbing material 20 is made of glass wool board (density 24 to 96K). The sound-absorbing material 20 has sound-absorbing properties and elasticity, but also has a thickness that, when formed into a rectangular plate with a length of 600 mm, does not sag by more than 200 mm in the middle when only both ends are supported. As long as it has rigidity, it can be made of a fiber aggregate other than foam or glass wool board. The foam is preferably an open-cell foam such as foamed polyethylene or foamed polystyrene. Further, as the fiber aggregate, it is preferable to use an inorganic fiber aggregate such as a glass wool fiber board or a rock wool fiber board, or a resin fiber aggregate such as an acrylic fiber aggregate or a PET fiber aggregate. It is more preferable to use glass wool (density 24 to 96K), which is difficult to burn and lightweight.

The sound absorbing material 20 is formed to have the same size as the ceiling material 10 that fits inside the rectangular frame portion 8 of the ceiling base 5. In the first embodiment, the sound absorbing material 20 is bent and installed inside the rectangular frame part 8, so it is made of, for example, a glass wool board (rectangular plate-like body) with a thickness of 25 mm and a size of 600 x 800 mm. There is. Note that the thickness of the sound absorbing material 20 is not particularly limited, but it is preferable to use a thickness of about 12 to 60 mm. Further, the dimensions of the sound absorbing material 20 are not limited to the above-mentioned dimensions, but it is preferable to use a dimension that is equivalent to the dimension of the ceiling material 10 when viewed from above in the installed form (bent state).

On the lower surface of the glass wool board constituting the sound absorbing material 20, two grooves having a V-shaped cross section and extending parallel to the short sides 20s are provided between the two short sides 20s, 20s (predetermined two sides). 21, 21 are formed. The two grooves 21, 21 are formed on the lower surface of the sound absorbing material 20 at positions separated by a predetermined distance (for example, 100 mm) from both ends in the length direction.

Each groove 21 is formed by cutting out the lower surface of the glass wool board that constitutes the sound absorbing material 20. In the first embodiment, each groove 21 has a V-shaped cross section with an angle α of 50 degrees, and extends from one end of the sound absorbing material 20 in the short side direction to the other end. Note that the angle α of the groove 21 is not limited to 50 degrees, but may be between 10 degrees and 85 degrees.

The sound absorbing material 20 has two grooves 21, 21, a shielding part 20A between the two grooves 21, 21, and two leg parts 20B between the two grooves 21, 21 and the two short sides 20s, 20s. , 20B. In addition, the sound absorbing material 20 is bent at each groove 21 portion and deformed so that the center between the short sides 20s and 20s is located above both ends (has an upwardly convex shape), It is installed inside the rectangular frame part 8.

Specifically, as shown in FIG. 5, when the leg portion 20B of the sound absorbing material 20 is rotated by the angle α of the groove 21 (50 degrees in the first embodiment) about the bottom of the groove 21, the sound absorbing material 20 ( (see the upper part of FIG. 5), and the two inner surfaces of the groove 21 abut (see the middle part of FIG. 5). In the first embodiment, after the two inner surfaces of the groove 21 come into contact with each other, by further rotating the leg portions 20B in the same direction, the angle β between the shielding portion 20A and each leg portion 20B is changed from 90 degrees. It is largely smaller than the angle obtained by subtracting the angle α of the groove 21 from 180 degrees (the angle formed by the shielding part 20A and each leg part 20B in the middle state of FIG. 5), and the groove 21 part of the sound absorbing material 20 is connected to the shielding part 20A. The leg portion 20B is in a compressed state (see the lower part of FIG. 5). In this state, the sound absorbing material 20 is placed inside the rectangular frame 8, and the ends of the legs 20B (short sides 20s, 20s of the sound absorbing material 20) are attached to the fixing portions 6a of the corresponding bars 6, 6 of the rectangular frame 8. , 6a or the connecting portions 6b, 6b (see FIGS. 2 and 4).

As described above, the sound absorbing material 20 is bent at each groove 21 portion, the shielding portion 20A and the leg portion 20B are compressed and deformed, and elastic restoring force acts and tends to separate from each other. Due to the elastic restoring force of the sound absorbing material 20, the short sides 20s, 20s of the sound absorbing material 20 are attached to the fixed parts 6a, 6a or the connecting parts 6b, 6b of the two corresponding bar materials 6, 6 of the rectangular frame part 8. Being pushed.

Further, the sound absorbing material 20 is installed inside the rectangular frame portion 8 in a deformed state such that the center between the short sides 20s and 20s is located above both ends (has an upwardly convex shape). has been done. By installing the sound absorbing material 20 in this manner, a space S is formed inside each rectangular frame portion 8 between the rectangular frame portion 8 and the ceiling material 10 on which the four peripheral portions are placed. Although the details will be described later, by forming such a space S, the sound insulation performance between the two rooms R1 and R2 separated by the partition wall PW is improved.

Note that it is preferable that the space S is as closed as possible. Therefore, as shown in FIG. 2 and FIG. It is preferable that it be provided so as to come into contact with the fixing part 6a or the connecting part 6b).

Further, in the first embodiment, each sound absorbing material 20 is arranged such that the short side portion 20s included in the leg portion 20B extends in the front-rear direction. That is, each sound absorbing material 20 is arranged in such a direction that the short side 20s is parallel to the partition wall PW extending in the front-rear direction.

-Position change-
Next, the operation when changing the installation position of the partition wall PW will be explained.

When changing the installation position of the partition wall PW, it is also necessary to change the position of the sound absorbing material 20. First, the ceiling material 10 placed on the rectangular frame section 8 next to the rectangular frame section 8 on which the sound absorbing material 20 is installed is removed, the ceiling is accessed from there, and the adjacent sound absorbing material 20 is removed. Since the sound absorbing material 20 is only held within the rectangular frame 8 by pressing the two short sides 20s, 20s against the rectangular frame 8, the sound absorbing material 20 has an elastic restoring force on the short sides 20s, 20s. The sound absorbing material 20 can be easily removed from the rectangular frame portion 8 by lifting the sound absorbing material 20 while applying a force in a direction (inward) against the sound absorbing material 20 .

After removing all of the plurality of sound absorbing materials 20, 20, 20 provided within a predetermined distance range from the original installation position of the partition wall PW, a rectangular frame located within a predetermined distance range from the new installation position of the partition wall PW is removed. The removed sound absorbing material 20 is installed inside the sections 8, . . . , 8. Specifically, the ceiling material 10 placed on the rectangular frame section 8 next to the rectangular frame section 8 where the sound absorbing material 20 is planned to be installed is removed, the attic space is accessed from there, and the adjacent rectangular frame section 8 is accessed from there. A sound absorbing material 20 is installed inside.

Note that the sound absorbing material 20 may be attached or removed by removing the ceiling material 10 placed on the rectangular frame portion 8 on which the sound absorbing material 20 is installed.

-Sound insulation effect-
Next, the sound insulation effect of the ceiling structure C will be explained.

In the first embodiment, a system ceiling structure is adopted as the ceiling structure C above the partition wall PW, and a plurality of ceiling materials 10, ..., 10 located within a predetermined distance range (for example, 950 mm) from the partition wall PW are , one sound absorbing material 20 is provided in correspondence with each ceiling material 10. Therefore, in the attic above the partition wall PW, a plurality of sound absorbing materials 20, . In addition, in the first embodiment, each sound absorbing material 20 is shaped to form a space S between it and the ceiling material 10 when it is placed inside the rectangular frame section 8 on which the corresponding ceiling material 10 is placed. is forming.

With such a configuration, in the first embodiment, for example, as shown in FIG. The sound that reaches the room R1 is attenuated by the sound absorbing material 20 and the space S sandwiched between the sound absorbing material 20 provided on the room R1 side and the ceiling material 10. Even if some of the sound leaks from the space S covered with the sound-absorbing material 20 in the attic and reaches the room R2 side in the attic, the sound-absorbing material 20 and the space S are also provided on the room R2 side. These further attenuate the sound.

Further, in the first embodiment, the short side portions 20s of each sound absorbing material 20 are pressed against the corresponding bar material 6 of the rectangular frame portion 8, so that the left and right ends of the space S are closed without any gap. With this configuration, even if it occurs in the room R1, passes through the ceiling material 10, reaches the attic, and attempts to proceed from the room R1 side to the room R2 side, that is, to the right side, the right end of the space S is blocked without any gap. Therefore, it is difficult for the sound to leak from the space S, and the sound insulation performance is improved.

As described above, by providing the ceiling structure C provided with the sound-absorbing material 20 of the first embodiment above the partition wall PW, the ceiling structure C1 without the sound-absorbing material 20 and the conventional ceiling structure C2 can be improved. In order to verify that the sound insulation performance improved, we conducted the following sound insulation performance test. In addition, in the conventional ceiling structure C2, glass wool with a thickness of 25 mm, which is longer than the sound absorbing material 20 of Embodiment 1, is cut at the construction site and a plurality of rectangular frames are cut on the lattice-shaped ceiling base 5. It is provided so as to straddle parts 8, . . . , 8.

[Sound insulation performance test]
A sound source for measurement is installed in one of two rooms R1 and R2 separated by a partition wall PW below the ceiling structure C shown in FIGS. 1 and 2, R1 is used as a sound source room, while the other room R2 was set as a receiving room, and a test sound (approximately 90 dB) with a center frequency of 500 Hz, which is considered to be the frequency band of the human voice, was generated from the measurement sound source, and measured with a sound level meter in room R1 (sound source room) and room R2 (receiving room). The difference in sound pressure level (sound insulation performance) was determined.

As a result of the sound insulation performance test, the sound pressure level difference (sound insulation performance) of ceiling structures C, C1, and C2 was 26.8 dB, 23.4 dB, and 24.1 dB, respectively, in the 500 Hz region, which is the frequency band of human voice. It can be seen that according to the ceiling structure C, the sound insulation performance between the two rooms is improved compared to the ceiling structure C1 and the conventional ceiling structure C2. Furthermore, even when the thickness of the sound absorbing material 20 of the ceiling structure C is changed and a sound absorbing material 20 with a thickness of 12 mm is used, the sound pressure level difference (sound insulation performance) in the 500 Hz region is 26.7 dB. 20, which was higher than the sound pressure level difference (sound insulation performance) between the inner ceiling structure C1 and the conventional ceiling structure C2.

-Effects of Embodiment 1-
In the first embodiment, a system ceiling structure is adopted as the ceiling structure C above the partition wall PW, and the sound absorbing material 20 is placed above the plurality of ceiling materials 10, ..., 10 within a predetermined distance range from the partition wall PW. These are provided in correspondence with each ceiling material 10. According to such a ceiling structure C, in the attic above the partition wall PW, a plurality of sound absorbing materials 20, . will be established. Therefore, the sound that is generated in one of the two rooms R1 and R2 partitioned by the partition wall PW and transmitted to the attic can be attenuated by the sound absorbing material 20, making it difficult for the sound to be transmitted to the other room. In addition, in the above ceiling structure C, a system ceiling structure is adopted in which all the ceiling materials 10 are removable, and each sound absorbing material 20 is associated with the ceiling material 10, and the corresponding ceiling material 10 of the ceiling base 5 is placed. It is arranged inside the rectangular frame part 8. According to such a configuration, since the sound absorbing material 20 is configured to have the same size as the ceiling material 10 for the system ceiling, the sound absorbing material 20 can also be easily attached and detached like the ceiling material 10. That is, according to the ceiling structure C, the position of the sound absorbing material 20 can be easily changed, so when changing the position of the partition wall PW, the position of the sound absorbing material 20 can also be easily changed.

Further, in the first embodiment, each sound absorbing material 20 is arranged inside the rectangular frame section 8 on which the corresponding ceiling material 10 is placed so as to form a space S between the sound absorbing material 20 and the ceiling material 10. There is. According to such a configuration, sound generated in one of the two rooms R1 and R2 partitioned by the partition wall PW and transmitted to the attic is transmitted not only to the sound absorbing material 20 but also to the sound absorbing material 20 and the ceiling material 10. Since it is also attenuated in the space S formed between them, it becomes more difficult for it to be transmitted to the other chamber. In other words, the sound insulation performance between the two rooms R1 and R2 partitioned by the partition wall PW is improved.

In addition, in the first embodiment, each sound absorbing material 20 is constituted by an elastic rectangular plate-like body, and the short sides 20s, 20s (two opposing predetermined sides) of the sound absorbing material 20 correspond to each other due to the elastic restoring force. The sound absorbing material 20 is bent and placed inside the rectangular frame portion 8 so as to be pressed against the bar materials 6, 6. According to such a configuration, the sound absorbing material 20 can be held in a state where at least a portion thereof is lifted from the ceiling material 10 to form the space S, without using a separate support member or the like. Further, according to the first embodiment, the size of the sound absorbing material 20 is determined according to the size of the ceiling material 10, so that it can be cut to a predetermined size at a factory or the like. In other words, according to the ceiling structure C of Embodiment 1, there is no need to cut the sound absorbing material 20 such as glass wool into a desired size at the construction site, and there is no need to generate dust during construction and pollute the construction site. do not have.

As described above, according to the first embodiment, the position of the sound absorbing material 20 can be easily changed in accordance with the change in the position of the partition wall PW, and the ceiling structure C can be easily constructed without polluting the construction site. can be provided.

Furthermore, in the first embodiment, each sound absorbing material 20 is arranged in such a direction that the short sides 20s, 20s (predetermined two sides) are parallel to the partition wall PW. According to such a configuration, not only the upper part of the space S formed between each sound absorbing material 20 and each ceiling material 10 but also the side on the partition wall PW side will be covered with the sound absorbing material 20. In addition, the short sides 20s of each sound absorbing material 20 parallel to the partition wall PW are pressed against the corresponding bar material 6 of the rectangular frame portion 8, so that the sides of the space S are closed without any gaps. Therefore, the sound generated in one of the two rooms R1 and R2 partitioned by the partition wall PW and transmitted to the attic becomes more difficult to be transmitted to the other room.

Further, in the first embodiment, two V-shaped grooves 21, 21 are formed on the lower surface of the rectangular plate-like body constituting each sound absorbing material 20. Such a configuration facilitates the work of bending the sound absorbing material 20 when installing the sound absorbing material 20 at a construction site. Therefore, according to the first embodiment, it is possible to install and change the position of the sound absorbing material 20 more easily.

《Embodiment 2 of the invention》
Embodiment 2 is the ceiling structure C of Embodiment 1 in which the structure of the sound absorbing material 20 is partially changed.

Specifically, as shown in FIG. 6, two cut grooves 22, 22 are formed in place of the two grooves 21, 21 having a V-shaped cross section formed on the lower surface of the sound absorbing material 20. . The two cut grooves 22, 22 are provided at the same position as the two grooves 21, 21, that is, on the lower surface of the sound absorbing material 20, at a position separated by a predetermined distance (for example, 100 mm) from both ends in the length direction. There is. Each cut groove 22 is formed by making a cut deep enough to reach near the top surface of the sound absorbing material 20 on the lower surface of the glass wool board that constitutes the sound absorbing material 20 . Each cut groove 22 extends from one end of the sound absorbing material 20 in the short side direction to the other end.

In the second embodiment, the sound absorbing material 20 has two cut grooves 22, 22, a shielding portion 20A between the two cut grooves 22, 22, and two short side portions 20s, 20s between the two cut grooves 22, 22. It is divided into two leg parts 20B, 20B between them. Further, the sound absorbing material 20 is bent at each cut groove 22 portion, and is deformed so that the center between the short sides 20s and 20s is located above both ends (has an upwardly convex shape). , is installed inside the rectangular frame portion 8 on which the corresponding ceiling material 10 is placed.

Specifically, as shown in FIG. 6, the sound absorbing material 20 is placed around the bottom of the cut groove 22 (the part between the cut groove 22 and the top surface of the sound absorbing material 20), and the leg portion 20B is attached to the shielding portion 20A. By pressing and rotating it (see the upper part of FIG. 6), it is bent so that the angle β between the shielding part 20A and each leg part 20B is larger than 90 degrees and smaller than 180 degrees at each cut groove 22 part ( (See bottom row of Figure 6). At this time, in the cut groove 22 portion of the sound absorbing material 20, the shielding portion 20A and the leg portion 20B are in a compressed state. In this state, the sound absorbing material 20 is placed inside the rectangular frame portion 8 on which the corresponding ceiling material 10 is placed, so that the ends of the leg portions 20B (the short sides 20s, 20s of the sound absorbing material 20) are inside the rectangular frame portion 8. It is installed so as to come into contact with the fixed parts 6a, 6a or the connecting parts 6b, 6b of the corresponding bar members 6, 6 (see FIG. 7).

As described above, the sound absorbing material 20 is bent at each cut groove 22 portion, and the shielding portion 20A and the leg portion 20B are compressed and deformed, and elastic restoring force acts to try to separate them from each other. Due to the elastic restoring force of the sound absorbing material 20, the short sides 20s, 20s of the sound absorbing material 20 are attached to the fixed parts 6a, 6a or the connecting parts 6b, 6b of the two corresponding bar materials 6, 6 of the rectangular frame part 8. Being pushed.

Also in the second embodiment, the sound absorbing material 20 is shaped like a rectangular frame in a state in which it is deformed so that the center between the short sides 20s and 20s is located above both ends (has an upwardly convex shape). Since it is installed inside each rectangular frame part 8, a space S is formed between the rectangular frame part 8 and the ceiling material 10 on which the four peripheral parts are placed. Thereby, also in the second embodiment, by forming the space S, the sound insulation performance between the two rooms R1 and R2 separated by the partition wall PW is improved.

In the second embodiment as well, it is preferable that the space S is as closed as possible. Therefore, similarly to Embodiment 1, the sound absorbing material 20 has four sides (short sides 20s, 20s and long sides 20l, 20l) that form the inner surface of the rectangular frame 8 (fixed parts 6a of the four bar members 6). Alternatively, it is preferably provided so as to abut the connecting portion 6b).

Also in the second embodiment, each sound absorbing material 20 is arranged such that the short side portion 20s included in the leg portion 20B extends in the front-rear direction. That is, each sound absorbing material 20 is arranged in such a direction that the short side 20s is parallel to the partition wall PW extending in the front-rear direction.

The ceiling structure C of the second embodiment configured as described above can also provide the same effects as the ceiling structure C of the first embodiment.

《Embodiment 3 of the invention》
Embodiment 3 is the ceiling structure C of Embodiment 1 in which the structure of the sound absorbing material 20 is partially changed. Specifically, in the third embodiment, as shown in FIG. 8, the two grooves 21, 21 are not formed on the lower surface of the sound absorbing material 20.

In Embodiment 3, the sound absorbing material 20 is curved and deformed so that the center between the short sides 20s and 20s is located above both ends (has an upwardly convex shape) (see the bottom of FIG. 8). ) is installed inside the rectangular frame portion 8 on which the corresponding ceiling material 10 is placed (see the lower part of FIG. 9). When the sound absorbing material 20 is curved and deformed and installed inside the rectangular frame section 8 in this way, the elastic restoring force of the sound absorbing material 20 causes the short sides 20s, 20s of the sound absorbing material 20 to be bent over the corresponding two sides of the rectangular frame section 8. It will be pressed against the fixed parts 6a, 6a or the connecting parts 6b, 6b of the bar materials 6, 6.

Also in the third embodiment, the sound absorbing material 20 is shaped like a rectangular frame in a state in which it is deformed so that the center between the short sides 20s and 20s is located above both ends (has an upwardly convex shape). Since it is installed inside each rectangular frame part 8, a space S is formed between the rectangular frame part 8 and the ceiling material 10 on which the four peripheral parts are placed. Thereby, also in the third embodiment, by forming the space S, the sound insulation performance between the two rooms R1 and R2 separated by the partition wall PW is improved.

In addition, also in the third embodiment, it is preferable that the space S is as closed as possible. Therefore, similarly to Embodiment 1, the sound absorbing material 20 has four sides (short sides 20s, 20s and long sides 20l, 20l) that form the inner surface of the rectangular frame 8 (fixed parts 6a of the four bar members 6). Alternatively, it is preferably provided so as to abut the connecting portion 6b).

Also in the third embodiment, each sound absorbing material 20 is arranged such that the short side portion 20s extends in the front-rear direction. That is, each sound absorbing material 20 is arranged in such a direction that the short side 20s is parallel to the partition wall PW extending in the front-rear direction.

The ceiling structure C of the third embodiment configured as described above can also provide the same effects as the ceiling structure C of the first embodiment. Further, according to the ceiling structure C of the third embodiment, the sound absorbing material 20 can be easily constructed by preparing the sound absorbing material 20 in the form of a rectangular plate and simply installing it in a curved manner at the construction site without performing groove processing. can.

《Other embodiments》
In each of the above embodiments, the sound absorbing material 20 is bent at the grooves 21 and 22, or is bent as a whole so that the center between two predetermined sides (short sides 20s and 20s) is located above both ends. It was curved and provided inside each rectangular frame portion 8. However, the shape of the sound absorbing material 20 in the installed state is not limited to the shape of each of the above embodiments, and a space S is formed between the sound absorbing material 20 and the corresponding ceiling material 10, and two predetermined sides of the sound absorbing material 20 are formed. (Short side portions 20s, 20s) may be deformed into any shape as long as it is pressed against the corresponding two bar materials 6, 6 of the rectangular frame portion 8 by elastic restoring force.

Further, in each of the first embodiments, each sound absorbing material Although the sound absorbing materials 20 are arranged, each sound absorbing material 20 may be arranged in such a direction that the short sides 20s, 20s are perpendicular to the partition wall PW.

In each of the embodiments described above, the partition wall PW was provided such that the upper end thereof was fixed to the bar material 6 extending in the front-rear direction. However, the partition wall PW can also be installed without fixing the upper end to the bar material 6. In that case, for example, if the partition wall PW is installed below the middle of the ceiling material 10 in the left-right direction, and three rows of rectangular frame parts 8,..., 8 are included in a range of 950 mm from the partition wall PW. In that case, the sound absorbing material 20 may be provided inside each of the three rows of rectangular frame portions 8, . . . , 8.

Further, the predetermined distance range (range of 950 mm) that determines the rectangular frame portion 8 in which the sound absorbing material 20 is provided is just an example, and is not limited to the distance range shown in each of the above embodiments. Any distance range may be used as long as the sound absorbing materials 20 are arranged on both sides of the partition wall PW in the orthogonal direction, but from the viewpoint of cost, the sound absorbing materials 20 may be arranged in a distance of 1 to 2 on both sides of the partition wall PW. It is preferable to provide each column.

Further, in the first to third embodiments described above, a grid type system ceiling C in which a plurality of bar members 6, ..., 6 are arranged in the front-rear direction and left-right direction and arranged in a grid shape in plan view was explained. The system ceiling according to the present invention is a line-type system ceiling C in which a plurality of bar members 6, . Good too.

In the line-type system ceiling C shown in FIG. 10, a plurality of bar members 6, ..., 6 extending in the front-rear direction are arranged in parallel in the left-right direction via a plurality of support members 9, 9, and assembled to form a ceiling. It constitutes the base layer 5. Two side portions of the ceiling material 10 are placed on locking portions (lower end portions protruding inward) 6c of two bar materials 6, 6 arranged in parallel on the ceiling base 5. The two sides of the ceiling material 10 placed on the locking portions 6c of the two bar materials 6, 6 are formed into step portions 10a with a rectangular cross section cut out at the lower corners. ing. A plurality of ceiling materials 10, . . . , 10 are arranged without gaps in the front-back direction between two bar members 6, 6 extending in the front-back direction. In addition, in FIG. 10, each ceiling material 10 is formed in a square shape when viewed from above, but in a line type system ceiling C, a ceiling material 10 having a rectangular shape when viewed from above can also be used. The rectangular ceiling material 10 is placed on the locking portions 6c of the two bar materials 6, 6 with the long sides oriented along the extending direction of the two bar materials 6, 6.

Also in the above-mentioned line type system ceiling C, the sound absorbing material 20 is provided above the plurality of ceiling materials 10, . In addition, when using a rectangular ceiling material 10 in a line type system ceiling C, the sound absorbing material 20 is formed so that it has dimensions smaller than the dimensions of the ceiling material 10 in plan view when installed, and one A plurality of (for example, two) sound absorbing materials 20, 20 may be provided above the ceiling material 10 in association with each other. The plurality of sound absorbing materials 20,..., 20 are arranged inside the two bar materials 6, 6 extending in the front-rear direction so as to form a space S between them and the corresponding ceiling material 10, and the sound absorbing materials 20, . The sides 20s, 20s are bent so that the center between the short sides 20s, 20s is located above both ends so that they are pressed against the two bar materials 6, 6 by elastic restoring force. Moreover, like the ceiling material 10, the plurality of sound absorbing materials 20, .

Even with the line type system ceiling C as described above, the same effects as the system ceiling C of the first to third embodiments can be achieved.

INDUSTRIAL APPLICATION This invention is useful for the ceiling structure provided above a partition wall.

1 Ceiling slab
5 Ceiling base
6 Bar material
8 Rectangular frame
10 Ceiling material
20 Sound absorbing material
20A shielding part
20B Legs
20s Short side (predetermined two sides)
21 Groove
22 Cut groove
C Ceiling structure
PW partition wall

Claims (5)

A ceiling structure provided above a partition wall,
A ceiling base made of bars suspended from a ceiling slab arranged in a parallel or lattice pattern;
a plurality of rectangular plate-shaped ceiling materials having two sides placed on the horizontally extending lower ends of the two bar materials arranged in parallel on the ceiling base;
Above the plurality of ceiling materials provided at a predetermined distance from the partition wall,
A sound absorbing material having dimensions equivalent to the dimensions of the ceiling material in plan view is provided in correspondence with each of the ceiling materials, or
A plurality of sound absorbing materials having dimensions smaller than the dimensions of the ceiling material in a plan view are arranged in correspondence with each of the ceiling materials and between the two bar materials without any gaps in the extending direction of the bar materials,
Each of the above sound absorbing materials is
Composed of an elastic rectangular plate-like body,
Inside the two bar materials on which the corresponding ceiling materials are placed, they are arranged so as to form a space between them and the corresponding ceiling materials,
The two opposing predetermined sides are bent such that the center between the two predetermined sides is located above both ends so that the two opposing sides are pressed against the two bar members by elastic restoring force. ceiling structure. The ceiling structure according to claim 1,
The ceiling structure is characterized in that each of the sound absorbing materials is arranged in such a direction that the two predetermined sides thereof are parallel to the partition wall. A ceiling structure provided above a partition wall,
A ceiling base made of bars suspended from a ceiling slab arranged in a parallel or lattice pattern;
a plurality of rectangular plate-shaped ceiling materials having two sides placed on the horizontally extending lower ends of the two bar materials arranged in parallel on the ceiling base;
Above the plurality of ceiling materials provided at a predetermined distance range from the partition wall, a sound absorbing material is provided in correspondence with each of the ceiling materials,
Each of the above sound absorbing materials is
Composed of an elastic rectangular plate-like body,
Inside the two bar materials on which the corresponding ceiling materials are placed, they are arranged so as to form a space between them and the corresponding ceiling materials,
The two opposing predetermined sides are bent so that the center between the two predetermined sides is located above both ends so that the two opposing sides are pressed against the two bar materials by elastic restoring force,
Two grooves having a V-shaped cross section and extending parallel to the two predetermined sides are formed between the two predetermined sides on the lower surface of the rectangular plate forming each of the sound absorbing materials. ,
Each of the above sound absorbing materials is
The two grooves are divided into a shielding portion between the two grooves and two leg portions between the two grooves and the predetermined two side portions,
A ceiling structure characterized in that the angle formed by the shielding part and each of the leg parts is bent so that it is larger than 90 degrees and smaller than the angle obtained by subtracting the angle of the groove from 180 degrees. A ceiling structure provided above a partition wall,
A ceiling base made of bars suspended from a ceiling slab arranged in a parallel or lattice pattern;
a plurality of rectangular plate-shaped ceiling materials having two sides placed on the horizontally extending lower ends of the two bar materials arranged in parallel on the ceiling base;
Above the plurality of ceiling materials provided at a predetermined distance range from the partition wall, a sound absorbing material is provided in correspondence with each of the ceiling materials,
Each of the above sound absorbing materials is
Composed of an elastic rectangular plate-like body,
Inside the two bar materials on which the corresponding ceiling materials are placed, they are arranged so as to form a space between them and the corresponding ceiling materials,
The two opposing predetermined sides are bent so that the center between the two predetermined sides is located above both ends so that the two opposing sides are pressed against the two bar materials by elastic restoring force,
The lower surface of the rectangular plate forming each of the sound absorbing materials has a depth between the two predetermined sides extending parallel to the two predetermined sides and reaching the vicinity of the upper surface of the rectangular plate. Two cut grooves are formed,
Each of the above sound absorbing materials is
The two cut grooves are divided into a shielding portion between the two cut grooves and two leg portions between the two cut grooves and the predetermined two side portions,
A ceiling structure characterized in that the shielding part and each of the leg parts are bent so that an angle formed by the shield part is larger than 90 degrees and smaller than 180 degrees. The ceiling structure according to claim 1 or 2,
The ceiling structure is characterized in that each of the sound absorbing materials is curved so that the center between the two predetermined sides is the highest.