Booth, connected booth, and ceiling portion

Abstract

To provide a booth, a connected booth, and a ceiling portion that can achieve sound insulation and water sprinkling over a wider area.SOLUTION: A booth has a floor, both side surfaces and front and rear surfaces surrounded by walls or doors. In a ceiling portion of the booth, sequentially from a lower part of the ceiling portion, a plurality of rod-shaped quadrangular prism sound insulation materials with a square cross section are arranged at a distance in a first direction, a plurality of rod-shaped first triangular prism sound insulation materials with a triangular cross section that are positioned on upper surfaces of the quadrangular prism sound insulation materials are arranged in the first direction on upper parts of the quadrangular prism sound insulation materials, a second triangular prism sound insulation material facing opposite to the first triangular prism sound insulation material is arranged between the first triangular prism sound insulation materials in the first direction, a plurality of third triangular prism sound insulation materials are arranged in the first direction on an upper part of the second triangular prism sound insulation material, and a plurality of openings are formed on one surface of the first triangular prism sound insulation material facing the second triangular prism sound insulation material.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a movable booth for use by one or more people, a booth for use by connecting such movable booths, a connecting booth, and a ceiling section. [Background technology]

[0002] Mobile booths are broadly divided into closed types, where the ceiling is sealed, and open types, where the ceiling is not sealed. In the case of closed types, an automatic fire extinguishing system is installed on the ceiling in case of a fire breaking out inside the booth, but in the case of open types, a fire is detected by a detector in the building itself and extinguished by the building's sprinklers, etc.

[0003] Closed types have excellent sound insulation, but are prone to discomfort due to poor ventilation and a closed-in feeling, and are expensive due to the use of firefighting equipment, ventilation equipment, and non-flammable materials.In contrast, open types have an open booth ceiling, so they do not impede water spraying from the building ceiling and have good ventilation, but on the other hand, they have inferior sound insulation.

[0004] For this reason, there have been semi-closed types in which the booth ceiling is partially open and has beams or the like attached to the ceiling, but this makes it difficult to adjust sound insulation, ventilation, and water sprinkling.Conventional technology that takes these factors into consideration has disclosed a booth device that has excellent sound insulation while not impeding water sprinkling from above using sprinklers or the like.

[0005] For example, Patent Document 1 aims to provide a booth apparatus and booth unit that can improve sound insulation by reflecting the voices of users inside with the roof material, without impeding the spraying of water from above by sprinklers or the like, and is configured as follows: "The booth apparatus 1 that constitutes the booth unit 100 has a peripheral wall 2 with an opening 2a formed facing upward, and the opening 2a is provided with a shielding portion that shields an area that is 30% or less of the opening area of ​​the opening 2a in a plan view, and the shielding portion includes a roof member 31 that is open between the peripheral wall 2 and two side edges that face each other in the front-to-rear direction, a plurality of first louver members 32, and a plurality of second louver members 33." [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2022-189693 A Summary of the Invention [Problem to be solved by the invention]

[0007] In order to improve sound insulation while considering ventilation and water sprinkling in a semi-closed movable booth, a ceiling structure with high sound insulation (shielding) properties is an issue. In the technology of Patent Document 1, a shielding plate and multiple louver (beam) structure near the center of the ceiling (roof) are used to increase sound attenuation, and ventilation and water sprinkling are increased in the gaps between the louvers, but because the generated sound is fixed, sound insulation and water sprinkling over a wider range are required when considering the range of movement of people inside the booth.

[0008] In view of the above, an object of the present invention is to provide a booth, a connecting booth, and a ceiling portion that can achieve sound insulation and water sprinkling over a wider area. [Means for solving the problem]

[0009] In view of the above, the present invention is defined as "a booth whose floor and both side surfaces and front and rear are surrounded by walls and doors, and whose ceiling portion has, from the bottom of the ceiling portion, a plurality of rod-shaped quadrangular prism sound-insulating materials with a square cross-section arranged in a first direction, a plurality of rod-shaped first triangular prism sound-insulating materials with a triangular cross-section positioned on the upper surfaces of the quadrangular prism sound-insulating materials arranged in the first direction on the upper portions of the quadrangular prism sound-insulating materials, a second triangular prism sound-insulating material different from the first triangular prism sound-insulating material is arranged between the first triangular prism sound-insulating materials in the first direction, and a plurality of third triangular prism sound-insulating materials are arranged in the first direction on the upper portions of the second triangular prism sound-insulating materials, and wherein one side of the first triangular prism sound-insulating material facing the second triangular prism sound-insulating material has a plurality of openings formed therein."

[0010] In addition, in the present invention, the booth is a "connected booth configured by arranging a plurality of booths in parallel."

[0011] In addition, the present invention is described as "a ceiling portion of a box-shaped booth, comprising, from the bottom, a plurality of rod-shaped quadrangular prism sound-insulating materials with a square cross-section arranged in parallel in a first direction, a plurality of rod-shaped first triangular prism sound-insulating materials with a triangular cross-section positioned on the top of the quadrangular prism sound-insulating materials in the first direction, a second triangular prism sound-insulating material different from the first triangular prism sound-insulating material arranged between the first triangular prism sound-insulating materials in the first direction, and a plurality of third triangular prism sound-insulating materials arranged in the first direction on the top of the second triangular prism sound-insulating material, and a plurality of openings formed on one side of the first triangular prism sound-insulating material facing the second triangular prism sound-insulating material." Effect of the Invention

[0012] The sound-insulating ceiling module according to the present invention and the movable booth in which it is mounted can achieve sound insulation and water sprinkling over a wider area.

[0013] More specifically, according to the embodiment of the present invention, the following effects can be achieved. In a semi-closed movable booth with a partially open booth ceiling, sound insulation can be improved to the same level as a closed movable booth with a covered booth ceiling. In addition, because of the structure suitable for water spraying from the building ceiling, the flow rate of water sprayed into the booth can be increased without obstruction. By replacing the closed ceiling with the present invention, fire extinguishing equipment and the like required in the closed type booth is eliminated, and the need for fireproofing of the booth inner walls is alleviated, resulting in cost reduction. Since the closed type movable booth has a covered booth ceiling, some users may feel a sense of claustrophobia, while the semi-closed type movable booth, on the other hand, is concerned about a sense of openness. However, since the open space of the present invention is tropic, the sense of closedness and openness change depending on the viewing angle, and both needs can be met. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view of a movable booth equipped with a sound-insulating ceiling module according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a front view of the movable booth of FIG. 1. [Diagram 3] A top-down view of the movable booth in Figure 1. [Figure 4] Right side view of the movable booth in Figure 1. [Diagram 5] 1 is a perspective view of a sound insulating ceiling module according to an embodiment of the present invention; [Figure 6] Cross-sectional view of a specific movable booth. [Figure 7] Enlarged cross-section of a soundproof ceiling module. [Figure 8] FIG. 2 is a perspective view of a plate of a sound-insulating ceiling module according to an embodiment of the present invention. [Figure 9] FIG. 1 is a perspective view of an internally hollow triangular prism. [Figure 10] Cross-section of an internally hollow triangular prism. [Figure 11] A top perspective view of a movable booth equipped with a sound-insulating ceiling module. [Figure 12] Assembly drawing of the soundproof ceiling module. [Figure 13] Schematic diagram of the sound insulation mechanism. [Figure 14] A diagram of ideal changes in sound insulation characteristics. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. EXAMPLES

[0016] Fig. 1 is a perspective view of a movable booth equipped with a sound-insulating ceiling module according to an embodiment of the present invention. Fig. 2 is a front view of the movable booth in Fig. 1, Fig. 3 is a top view of the movable booth in Fig. 1, and Fig. 4 is a right side view of the movable booth in Fig. 1.

[0017] In Fig. 1, reference numeral 1 denotes a movable booth, which is formed into a box-like shape by multiple booth supports 3 arranged in the height direction, side panels 7, a bottom panel, and a front door 8 made of transparent glass 4 or resin or the like. To make the booth movable, a booth fixing adjuster 5 and movable wheels 6 are attached to the bottom panel. Furthermore, the front door 8 is equipped with a front door movable stopper 10, and a table 9 (desk, etc.) is appropriately installed inside the booth.

[0018] The feature of the present invention relates to the configuration of the ceiling portion, which is configured to include a sound insulating ceiling module 2A and an inverted sound insulating ceiling module 2B as shown in the figure.

[0019] According to the front view of the movable booth in Fig. 2, a front door handle 11 for opening and closing the front door 8 when a user enters and exits through the front door 8 is shown. According to the top view of the movable booth in Fig. 3, the front door 8 is an opening and closing door. According to the right side view of the movable booth in Fig. 4, the sound insulating ceiling modules 2A and 2B are fixedly installed using a ceiling support 41.

[0020] The movable booth 1 according to the embodiment of the present invention is generally configured as described above, and Fig. 6 is a more detailed front view of the movable booth in Fig. 2. As shown in Fig. 6, the movable booth 1 is configured as a rectangular parallelepiped pillar using multiple booth supports 3, a central support 16, a bottom support 17, and a ceiling support 41, with side walls 7 symmetrically attached to the supports on the right and left sides, two rear walls 12 made of transparent glass (or resin, etc.) attached to the rear of the booth, and a transparent glass 4 attached to the left side and a front door (transparent glass, etc.) 8 attached to the right side of the booth front. The booth bottom is configured by multiple bottom supports 17 and a bottom plate 39, and movable wheels 6 and booth fixed adjusters 5 are attached to the bottom supports 17 via reinforcing metal fittings near the four corners of the rectangular parallelepiped.

[0021] Two sound-insulating ceiling modules 2A (2B) are provided on the ceiling surface as shown in Fig. 1. As shown in Fig. 6, the interior of the booth has inner walls 13 containing sound-insulating material mounted on the inner walls of the left and right side surfaces 7, and a ceiling wall 14 containing sound-insulating material mounted on the inside of the booth except for the sound-insulating ceiling module openings 27 of the sound-insulating ceiling modules 2A (2B) in the ceiling. The inside of the booth is designed to be used by people, and a table (desk, etc.) 9 is attached to each booth support 3 at a position where it would be used while sitting on a chair, and a power strip 15 is provided on the table 9.

[0022] 6, a floor wall 40 containing sound-proofing material is provided between a number of bottom supports 17 on the outside of the bottom plate 39, and the rear wall 12 made of transparent glass (or resin, etc.), the front transparent glass (or resin, etc.) 4 and the front door (transparent glass, etc.) 8 are attached to each booth support or door support via glass or other fixing parts 18. The front door 8 is provided with front door handles 11 on the outside and inside so that people can open and close it, and a front door movable stopper 10 is attached to the booth support 3 to stop the front door 8 when it is opened to a certain angle.

[0023] An example of the overall configuration of the movable booth 1 has been explained above with reference to Figs. 1 to 4 and 6. In contrast, the present invention is characterized by the structure of the ceiling part (C in Fig. 6), which will be explained in detail with reference to Figs. 5 and 6 to 8. Fig. 5 is a perspective view of a sound-insulating ceiling module 2A (2B) according to an embodiment of the present invention, and the detailed configuration of the sound-insulating ceiling module 2A (2B) will be explained with reference to Figs. 6 to 8 below.

[0024] FIG. 6 is a cross-sectional view taken along the line Y1-Y1 of FIG. 1, and part C in the figure is a cross-sectional view of the sound insulating ceiling module 2A according to the embodiment of the present invention, and FIG. 7 is an enlarged view of this part.

[0025] According to Figure 7, the sound-insulating ceiling module 2A (2B) is constituted by, successively from the bottom of the ceiling portion, a plurality of rod-shaped quadrangular prism sound-insulating materials 20 with a square cross-section arranged in the same direction, a plurality of rod-shaped triangular prism sound-insulating materials 19 with a triangular cross-section positioned on the upper surface of the quadrangular prism sound-insulating materials 20 arranged in the same direction on the upper part of the quadrangular prism sound-insulating materials 20, inverted triangular prism sound-insulating materials 19 arranged in the same direction between the triangular prism sound-insulating materials 19, and a plurality of triangular prism sound-insulating materials 19 arranged in the same direction on the upper part of the inverted triangular prism sound-insulating materials 19.

[0026] In this figure, the triangular prism sound insulation material 19 is formed as an internal hollow triangular folded steel plate column 21A, and the inverted triangular prism sound insulation material 19 is formed as an internal hollow triangular folded steel plate column 21B. Reference numeral 22 denotes the bending part of the sound insulating ceiling module plate, and 23 denotes the fixing part of the internal hollow triangular folded steel plate column.

[0027] The method of forming the sound-insulating ceiling module as shown in Fig. 7 will be described below with reference to Fig. 8 to Fig. 10. Fig. 8 is a perspective view of the plate of the sound-insulating ceiling module, Fig. 9 is a perspective view of the internal hollow triangular prism of the sound-insulating ceiling module, and Fig. 10 is a cross-sectional view of the internal hollow triangular prism of the sound-insulating ceiling module.

[0028] In FIG. 8, 22 is a bent part of the sound insulating ceiling module plate, 23 is a fixing part of the hollow triangular bent steel plate column, 24 is a sound insulating ceiling module plate, 25 is a cutout part of the sound insulating ceiling module plate, 26 is a fixing part of the sound insulating ceiling module, and 27 is an opening part of the sound insulating ceiling module.

[0029] In addition, in Figure 9, 28 is the opening part of the internal hollow triangular folded steel plate column, 29 is the fixing surface of the internal hollow triangular folded steel plate column, and 30 is the opening surface of the internal hollow triangular folded steel plate column. In Figure 10, 31 is the mounting surface of the sound insulation material of the internal hollow triangular folded steel plate column, and 32 is the bending processing gap of the internal hollow triangular folded steel plate column.

[0030] In the following description, the formation of a sound insulating ceiling module will be described with reference to Fig. 8-Fig. 10. The sound insulating ceiling module 2A (2B) is configured such that the internal hollow triangular folded steel plate columns 21A and 21B are arranged on the sound insulating ceiling module openings 27 opened in the sound insulating ceiling module plate 24 of Fig. 8, and the fixing parts 23 of the internal hollow triangular folded steel plate columns on the internal hollow triangular folded steel plate column fixing surface 29 (Fig. 9) and the fixing parts 23 of the internal hollow triangular folded steel plate columns in the sound insulating ceiling module plate bending part 22 of the sound insulating ceiling module plate 24 are fastened with screws or the like. At this time, the inverted internal hollow triangular folded steel plate column 21B is arranged next to the internal hollow triangular folded steel plate column 21A, and the inverted internal hollow triangular folded steel plate column 21A is arranged next to that, and so on, in the number of fixing parts 23 of the internal hollow triangular folded steel plate columns of the plate 24.

[0031] Either the internal hollow triangular folded steel plate column 21A or the internal hollow triangular folded steel plate column inverted 21B may be at the end. A square prism sound insulation material 20 is attached to the sound insulation material attachment surface 31 of the internal hollow triangular folded steel plate column of the installed internal hollow triangular folded steel plate column 21A with double-sided tape or the like, and a triangular prism sound insulation material 19 is attached in the same manner to the internal hollow triangular folded steel plate column inverted 21B.

[0032] In the embodiment of Fig. 5, five hollow triangular folded steel plate columns 21A and five hollow triangular folded steel plate columns 21B are alternately attached to the sound-insulating ceiling module 2A as shown in the cross-sectional view of Fig. 7. The square column sound-insulating material 20 side is inside the booth, and the triangular column sound-insulating material 19 side is outside the booth.

[0033] 9 is a perspective view of the hollow triangular prism of the sound insulating ceiling module according to the embodiment of the present invention, and provides a detailed explanation of the hollow triangular folded steel plate column 21A (21B) described above. The hollow triangular folded steel plate column 21A (21B) is made by folding a single thin steel plate so that the cross section is triangular, and both ends are folded at the previously cut triangular surfaces so that the upper and lower surfaces of the triangular prism are covered. This hollow triangular folded steel plate column fixing surface 29 is formed.

[0034] When bending this single thin steel plate, due to processing conditions such as production equipment, it is difficult for the bent end faces to completely match, so a bending gap 32 is created in the internally hollow triangular folded steel plate column as shown in Figure 10. To fill this gap, a square prism sound insulation material 20 or a triangular prism sound insulation material 19 is attached to the sound insulation material mounting surface 31 of the internally hollow triangular folded steel plate column, making it closer to an internally hollow state while reducing material and processing costs.

[0035] A plurality of hollow triangular bent steel plate column openings 28 are formed on the opening surface 30 of the hollow triangular bent steel plate column 21A (21B) described above. These openings 28 have the effect of attenuating the voice generated in the booth and the noise outside the booth, which will be described later.

[0036] An assembly diagram of the sound insulating ceiling module is shown in Fig. 12. According to this three-dimensional assembly diagram, in the sound insulating ceiling module 2A (2B), from the bottom of the ceiling part, a plurality of rod-shaped square columnar sound insulation materials 20 with a square cross section are arranged in the same direction, and a plurality of rod-shaped triangular columnar sound insulation materials 21A with a triangular cross section are arranged on the top surface of the square columnar sound insulation materials 20 in the same direction on the top of the square columnar sound insulation materials 20.

[0037] On the other hand, by using a sound-insulating ceiling module plate 24 composed of a sound-insulating ceiling module opening 27 and a sound-insulating ceiling module plate bending part 22 including a fixing part 23 for an internal hollow triangular bent steel plate column, triangular prism sound-insulating material 21A and an inverted triangular prism sound-insulating material 21B are arranged in the same direction between the triangular prism sound-insulating material 21A, and multiple triangular prism sound-insulating materials 19 are fixed and arranged in the same direction on the top of the inverted triangular prism sound-insulating material 21B.

[0038] In the sound-insulating ceiling module 2A (2B) assembled in this way, an open diagonal space is created in the hollow triangular folded steel plate column 21A and the hollow triangular folded steel plate column inverted 21B in the cross-sectional view shown in Figure 7, allowing water sprayed from sprinklers on the ceiling of the building in which the booth is installed to flow efficiently into the booth. In addition, the triangular column sound-insulating material 19 also increases the flow of water sprayed into the booth more efficiently due to the inclined triangular part.

[0039] Next, we will explain the sound insulation. There are openings 28 in the triangular bent steel plate column of the hollow interior space on the opening surface 30 of the triangular bent steel plate column in the diagonal open space described above, and these openings 28 have the effect of attenuating the voice from inside the booth and the noise outside the booth.

[0040] Fig. 13 is a schematic diagram of the sound insulation mechanism, and is a schematic diagram of a part of the arrangement of the internal hollow triangular folded steel plate pillar 21A (21B) of Fig. 7. When the original noise (A) from outside the booth, the flow 36 of external sound before sound insulation, tries to pass through the diagonal air hole, it partially invades the opening 28 of the internal hollow triangular folded steel plate pillar. The invading sound resonates (B) in the internal hollow part 35 of the internal hollow triangular folded steel plate pillar 21A (21B) to become interference sound 37, which is superimposed on the flow 36 of external sound before sound insulation (C), and becomes sound insulation 38 where the interference sounds of external sound overlap, and is transmitted to the booth.

[0041] This phenomenon in which the external sound 36 and the interference sound 37 overlap, resulting in sound insulation 38, is generally called the Helmholm resonance principle. Figure 14 shows this principle in an ideal change diagram of sound insulation characteristics.

[0042] In Figure 14, the sound frequency characteristics of the external sound flow 36 before sound insulation (A) overlap with the inverted sound frequency characteristics of interference sound 37 caused by resonance in the internal cavity (B), and change to the canceled sound frequency characteristics of sound insulation 38 where interference sounds of external sounds overlap (C). Utilizing this principle, the internal cavity triangular folded steel plate column 21A (21B) is suitable for improving the sound insulation and water sprinkling from the building ceiling, which were major issues with movable booths.

[0043] Figures 13 and 14 show ideal state changes, and in reality, various losses occur and it is impossible to cancel out all of the voice sounds from inside the booth and all of the noise from outside the booth. However, with the sound-insulating ceiling module 21A (21B) of the present invention and the movable booth 1 equipped with this, it is possible to achieve sound-insulating performance close to that of a closed-type movable booth with a covered ceiling.

[0044] In the perspective view of the movable booth shown in Fig. 1, a sound insulating ceiling module 2B is mounted, which is inverted on the same plane as the sound insulating ceiling module 2A. These two modules have the same structure, and the sound insulating ceiling module plate 24 shown in Fig. 8 has a sound insulating ceiling module plate cutout portion 25 on the diagonal left and right corners. This cutout portion 25 makes it possible to align and attach the sound insulating ceiling module 2B, which is inverted on the same plane as the sound insulating ceiling module 2A, to the ceiling support 41 in the center of the booth ceiling, leading to cost reduction. The sound insulating ceiling module 2A (2B) is fixed to the multiple ceiling supports 41 of the booth ceiling at the sound insulating ceiling module fixing portion 26 using multiple screws or the like.

[0045] FIG. 11 is a perspective view from directly above a movable booth equipped with a sound-insulating ceiling module according to an embodiment of the present invention. The sound-insulating ceiling module 2A (2B) does not appear to have any holes when viewed directly from the ceiling due to the hollow triangular folded steel plate column 21A (21B), but when the angle is changed, an open area such as the sound-insulating ceiling module open surface 33A (33B) can be confirmed. By changing the angle in this way, it is possible to meet both the needs of the person using the booth with respect to a sense of closedness or openness. People who want a sense of openness are concerned about sound insulation, but this can be solved by the sound-insulating performance described above. People who want a sense of closedness can reduce the sense of openness by not changing the angle.

[0046] The sound insulating ceiling module 2A (2B) according to an embodiment of the present invention can provide the same effect in a fixed booth or partition that is not movable like the movable booth 1.

[0047] The soundproof ceiling module of the present invention is composed of triangular beams made of soundproof material and a steel beam bent into a hollow triangular center column, so that the water sprayed in a fan shape from the sprinklers installed on the ceiling of the building follows the flow of water, filling the booth without obstruction.

[0048] In addition, by attaching triangular or square soundproofing material to one side of a steel beam that has been bent into a hollow triangular center column, and arranging them at equal intervals so that the soundproofing material alternates inside and outside the booth, it is possible to attenuate both outside noise and inside the booth.

[0049] In addition, the multiple holes on one side of the steel beam bent into a triangular central pillar in the interior cavity trap and attenuate the sound that penetrates from the outside into the interior by resonating within the internal cavity. Conversely, the sound inside the booth is also attenuated in the same way.

[0050] In this way, the structure makes it easier for external and internal sounds transmitted by the air to pass through the openings in the sound-insulating ceiling structure module, thereby achieving even greater sound insulation.

[0051] According to the above-described embodiment of the present invention, in a semi-closed movable booth with a partially open booth ceiling, sound insulation can be improved to the same level as a closed movable booth with a covered booth ceiling. In addition, because of the structure suitable for water spraying from the building ceiling, the water spraying flow rate into the booth can be increased without being hindered. By replacing the closed ceiling with the present invention, fire extinguishing equipment and the like required in the closed type booth is eliminated, and the need for fireproofing of the booth inner wall is alleviated, resulting in cost reduction. In addition, since the closed type movable booth has a covered booth ceiling, some users may feel a sense of claustrophobia, while the semi-closed type movable booth, on the other hand, is concerned about a sense of openness. However, since the open space of the present invention is tropic, the sense of closedness and the sense of openness change depending on the viewing angle, and both needs can be met. [Explanation of symbols]

[0052] 1: Movable booth, 2A: Soundproof ceiling module, 2B: Inverted soundproof ceiling module, 3: Booth support, 4: Transparent glass (or resin, etc.), 5: Booth fixed adjuster, 6: Movable wheels, 7: Side panel, 8: Front door (transparent glass, etc.), 9: Table (desk, etc.), 10: Front door movable stopper, 11: Front door handle, 12: Back wall made of transparent glass (or resin, etc.), 13: Inner wall with soundproofing material, 14: Ceiling wall with soundproofing material, 15: Power tap, 16: Central support, 17: Bottom support, 18: Fixed parts such as glass, 19: Triangular column soundproofing material, 20: Square column soundproofing material, 21A: Internal hollow triangular folded steel plate column, 21B: Internal hollow triangular folded steel plate column inverted, 22: Soundproof ceiling module plate bent part, 23: Internal hollow triangular folded steel plate Fixing part of the pillar, 24: Sound insulation ceiling module plate, 25: Sound insulation ceiling module plate cutout, 26: Sound insulation ceiling module fixing part, 27: Sound insulation ceiling module opening, 28: Opening part of internal cavity triangular folded steel plate pillar, 29: Fixing surface of internal cavity triangular folded steel plate pillar, 30: Opening surface of internal cavity triangular folded steel plate pillar, 31: Sound insulation material mounting surface of internal cavity triangular folded steel plate pillar, 32: Bending gap of internal cavity triangular folded steel plate pillar, 33A: Opening surface of sound insulation ceiling module, 33B: Inverted opening surface of sound insulation ceiling module, 34: Ceiling support, 35: Internal cavity, 36: Flow of outside sound before sound insulation, 37: Interference sound due to resonance in internal cavity, 38: Sound insulation with overlapping interference sound of outside sound, 39: Bottom plate, 40: Floor wall with sound insulation material, 41: Ceiling support

Claims

1. The booth is surrounded by walls and doors on the floor, sides, front and back. The ceiling of the booth is configured such that, from the bottom of the ceiling, a plurality of rod-shaped quadrangular prism sound insulation materials with a square cross section are arranged in a first direction, a plurality of rod-shaped first triangular prism sound insulation materials with a triangular cross section are positioned on the top surfaces of the quadrangular prism sound insulation materials and arranged in the first direction on the top of the quadrangular prism sound insulation materials, a second triangular prism sound insulation material different from the first triangular prism sound insulation materials is arranged between the first triangular prism sound insulation materials in the first direction, and a plurality of third triangular prism sound insulation materials are arranged in the first direction on the top of the second triangular prism sound insulation materials, A booth characterized in that a plurality of openings are formed on one surface of the first triangular prism sound-insulating material facing the second triangular prism sound-insulating material.

2. 2. A booth as described in claim 1, characterized in that a ceiling module having plate bending portions at both ends of an opening is placed on the ceiling portion, and the first triangular prism sound-insulating material and the second triangular prism sound-insulating material are fixed and placed by fixing portions formed on the plate bending portions.

3. 3. The booth according to claim 2, The booth is characterized in that the ceiling module includes two sets, each of which has the first triangular prism sound-insulating material and the second triangular prism sound-insulating material fixed thereto.

4. 2. The booth of claim 1, The triangular prism sound-proofing material is formed by folding a flat plate into a triangular shape, and the base of the triangle, where the joints formed at both ends of the flat plate are formed, is in contact with the rectangular prism sound-proofing material or another triangular prism sound-proofing material.

5. A linked booth constructed by arranging a plurality of booths according to claim 1 in parallel.

6. A ceiling portion of a box-shaped booth, From the bottom, a plurality of rod-shaped quadrangular prism sound insulation materials with a square cross section are arranged in parallel in a first direction, a plurality of first rod-shaped triangular prism sound insulation materials with a triangular cross section are positioned on the top surface of the quadrangular prism sound insulation materials and arranged in the first direction on the top of the quadrangular prism sound insulation materials, a second triangular prism sound insulation material different from the first triangular prism sound insulation materials is arranged between the first triangular prism sound insulation materials in the first direction, and a plurality of third triangular prism sound insulation materials are arranged in the first direction on the top of the second triangular prism sound insulation materials, A ceiling portion characterized in that a plurality of openings are formed on one surface of the first triangular prism sound-insulating material facing the second triangular prism sound-insulating material.

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