Building

Abstract

To provide technology that enables both control of closure and consideration of sound in spaces for work, etc., in existing buildings.SOLUTION: In a room 2 of a building 1, a wall body 15 formed by one or more board members 10 erected and having an inner void area 11, which is an office space, and a doorway 12, which connects the inner void area 11 to a space 2A of the room 2; a door 16 that closes and opens freely between the inner void area 11 and the space 2A of the room 2 at the doorway 12; and a first sound-absorbing body 17A provided in at least the door 16 of the board member 10 and the door 16 are provided.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a building, and more particularly to a building that is capable of achieving both control of the degree of closure in a space for office use and consideration of noise reduction. [Background technology]

[0002] With the evolution of network computing technology and companies responding to work style reforms, so-called telecommuting is becoming more widespread. However, even employees of companies that have introduced telecommuting systems are struggling to find space to work at home. While companies are moving towards free address systems in their offices, they are also finding it necessary to provide individual spaces where employees can concentrate on their work when they come to the office.

[0003] In light of the above, technologies have been proposed that can flexibly respond to the environment in which people find themselves and create the spaces necessary for work, study, etc. One example of such technology is a technology proposed for dwelling units that can flexibly respond to the needs of residents according to their income brackets or to changes in their life stages and lifestyles (see Patent Document 1).

[0004] The technology described in Patent Document 1 relates to a dwelling unit having a first unit, a first void space installed in the first unit and located in the center or on one side of a first side of the longitudinal outline of the first unit in a plan view, and a first plumbing fixture installed within the first unit and adjacent to the first void space, wherein the first void space is used to install piping connected to the first plumbing fixture.

[0005] In addition, technology has been proposed for box-shaped panel buildings that can be safely and securely installed on floors without a single partition as rooms for plumbing, children's rooms, or private spaces (see Patent Document 2).

[0006] The technology described in Patent Document 2 relates to a box-shaped panel building with self-supporting indoor partitions, characterized in that on a floor without a single partition, a partition room surrounded by panels to house a water-related facility room equipped with one or more types selected from a bathroom unit, a toilet unit, and a vanity unit, or a child's room, a private space room, or a special room, etc., can be easily assembled and detached using several panel materials of fixed dimensions and special connecting fittings. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2020-133388 A [Patent Document 2] JP 2016-33322 A Summary of the Invention [Problem to be solved by the invention]

[0008] By adopting conventional technology, individual spaces can be newly constructed in existing buildings. However, depending on the circumstances of employees and companies, individual spaces that are isolated and closed from the surroundings (referred to as closed spaces here) are not the only desirable space. For example, in addition to closed spaces, there are many cases where individual spaces (referred to as semi-closed spaces here) are required where employees can work while sharing a certain amount of space with the surroundings. Specifically, for those who work from home due to childcare or nursing care, there may be cases where a semi-closed space is required where employees can work while casually checking on the condition of their children or care recipients and communicating with them, and cases where a closed space is required to participate in online meetings and discuss critical matters. In addition, in office spaces, there may be cases where employees need a semi-closed space where they can work while sensing each other's work status with their colleagues and superiors, and cases where a completely closed space is required where they can think deeply about their work. However, there is no prior art technology relating to buildings that allow a user to freely select between semi-closed and completely closed spaces as individual spaces for such work depending on the situation.

[0009] In addition, in light of the above-mentioned circumstances, areas considered for constructing individual spaces include the living room or a corner of a hallway in an employee's home, or a corner of a work area in a corporate office. However, if work is carried out in an environment where desks and other equipment are simply placed in such areas, problems with sound (noise) are likely to occur, such as the sound of online meetings and keyboard typing being transmitted to those around, or the sound of a television or stereo in the living room or cooking sounds in the kitchen being transmitted to those working. Such sound problems are not only psychologically bothersome, but can also be a problem for business security management. However, there is currently no technology available to construct a semi-closed space that takes into account the sound-related issues discussed above.

[0010] Therefore, the present invention has been made in consideration of the above-mentioned problems, and its object is to provide a building that makes it possible to control the degree of closedness in spaces used for office work, etc. while also taking into consideration noise. [Means for solving the problem]

[0011] The above-mentioned problems are solved by the building of the present invention by configuring a room in the building with a wall formed by one or more upright plate-like members, having an interior area which is an office space and an entrance / exit connecting the interior area to the space of the room, a door at the entrance which can be opened and closed freely to separate the interior area from the space of the room, and a first sound-absorbing body provided on at least the door of the plate-like member and the door. By being configured as described above, the building of the present invention can achieve both control of the closedness of the space used for work, i.e., the interior space, through the use of doors and consideration of sound reduction through the use of sound absorbing materials.

[0012] Furthermore, in the above-mentioned building, it is preferable that the wall is composed of a pair of first plate-like members facing each other and a second plate-like member located between the first plate-like members, and that the interior area is a space surrounded by the pair of first plate-like members and the second plate-like member located between the first plate-like members. According to the above configuration, the first plate-like member and the second plate-like member efficiently form a U-shaped inner space, and the opening and closing of the door at the entrance of the space can be controlled. As a result, it is possible to efficiently control the closedness of the space for work and to consider noise at the same time.

[0013] Furthermore, in the above-mentioned building, it is preferable that the door be composed of two double-leaf doors that rotate from the left and right ends of the entrance, and that each of the two doors be equipped with a storage mechanism that, when in the fully open position, slides along the surface of each of the pair of first members toward the rear of the interior space. With the above-mentioned configuration, each of the two doors that make up the door can be accommodated in the interior space with efficient and smooth operation. In turn, it becomes possible to more efficiently control the closedness of the office space and to consider noise at the same time.

[0014] In addition, in the above-mentioned building, a second sound absorbing body is attached to the upper end surface of each of the two doors, and it is preferable that each of the second sound absorbing bodies is equipped with an interference avoidance structure that prevents interference with each other when the two doors are opened and closed. According to the above configuration, the open space above the office space, which is likely to cause sound leakage, can be appropriately covered with two sound absorbing bodies (second sound absorbing bodies) that do not interfere with each other. As a result, it becomes possible to more efficiently control the closedness of the space for work and to consider sound at the same time.

[0015] In the above-mentioned building, the interference avoidance structure is preferably any one of the following: a structure in which the installation heights of the second sound absorbing bodies at the upper end faces of the two doors are different between the second sound absorbing bodies; a structure in which the end cross section of one of the second sound absorbing bodies is provided with a recess into which the other second sound absorbing body can be stored from its end; and a structure in which each of the second sound absorbing bodies has a folding mechanism, so that when the door is closed, each of the second sound absorbing bodies is folded and when the door is opened, each of the second sound absorbing bodies is unfolded. According to the above configuration, it is possible to more reliably configure the two sound absorbing bodies (second sound absorbing bodies) so that they do not interfere with each other even when the door on which they are installed is opened or closed. As a result, it is possible to more reliably control the closedness of the space for work and to be considerate of sound.

[0016] In the above-mentioned building, it is preferable that the first or second sound absorber is any one of a sound absorbing panel, a porous sound absorber, a vibration type sound absorber, and a resonance type sound absorber. According to the above-mentioned configuration, it is possible to selectively install a sound absorbing body capable of efficiently absorbing sound according to the structure and characteristics of the door or shutter. In turn, it is possible to more effectively control the closedness of the space for work and the like while also taking into consideration the sound. Effect of the Invention

[0017] The building of the present invention makes it possible to achieve both appropriate openness and consideration for noise as an office area. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a plan view showing a first configuration example of a building in one embodiment of the present invention. [Diagram 2] FIG. 4 is a plan view showing a second configuration example of a building in one embodiment of the present invention. [Diagram 3] FIG. 4 is a side view showing a second configuration example of a building in one embodiment of the present invention. [Figure 4] FIG. 11 is a perspective view showing a second configuration example of a building in one embodiment of the present invention. [Diagram 5]FIG. 11 is a plan view showing a third configuration example of a building in one embodiment of the present invention. [Figure 6] FIG. 11 is an elevation view showing a third configuration example of a building in one embodiment of the present invention. [Figure 7] FIG. 11 is an elevation view showing a fourth configuration example of a building in one embodiment of the present invention. [Figure 8] FIG. 13 is a plan view showing a fifth configuration example of a building in one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] <<About a building according to one embodiment of the present invention>> Hereinafter, the components and structure constituting a building of the present invention, as well as their operation, will be described with reference to the accompanying drawings, taking one embodiment of the present invention (hereinafter, this embodiment) as an example.

[0020] In the drawings, each component and structure is shown somewhat simplified and schematic to make the explanation easier to understand, and the relative sizes (dimensions) and intervals between each component and structure shown in the drawings are different from the actual ones.

[0021] In the following description, a house (whether a detached house or an apartment building) will be used as an example of a building, and a structure in which a space for telecommuting, i.e., an office space, is appropriately configured in a room within the house will be described. However, the present invention can also be applied to buildings other than houses, such as office buildings, factories, distribution facilities, parking lots, entertainment facilities, and educational facilities. The space secured within a room by the present invention is not limited to an office space, and may be a space used for learning, hobbies, or the like.

[0022] [First example of building configuration] First, a first configuration example of a building 1 in this embodiment will be described. Fig. 1 is a plan view showing the first configuration example of a building 1 in this embodiment. In the first configuration example, the building 1 has at least one room inside, and for example, an office space 11 (interior space) is constructed in the living / dining / kitchen (hereinafter, LDK) space 2A, which is the room 2. For those who work from home, if the office space 11 is constructed in the LDK, it is preferable because it is easy to check on the condition of family members who are at home while working, in order to care for them. On the other hand, if voices or work sounds generated in the office space 11 leak into the living, dining, and kitchen area, the sounds may be perceived as disturbing sounds (noise) by people relaxing in the living, dining, and kitchen area.

[0023] In contrast, the office space 11 in the building 1 of this embodiment can be surrounded by the wall 15 and door 16 to which the first sound absorber 17A is attached according to the convenience of the user, as shown in Fig. 1, so that the sound and the like in the office space 11 are appropriately absorbed and suppressed. In other words, the sound generated in the office space 11 is reduced to a volume that does not cause a nuisance to the people in the living, dining, and kitchen area. Similarly, the sound and the like generated on the living, dining, and kitchen side is absorbed and reduced by the first sound absorber 17A, so that the sound generated on the living, dining, and kitchen side and heard in the office space 11 can be reduced.

[0024] In the office space 11 having the above-mentioned characteristics, when a user works, the doors 16A and 16B constituting the so-called double-leaf door 16 can be rotated and opened outward to form an entrance / exit 12. This corresponds to the flow of user operations when the office space 11 goes from "closed" to "opened." In other words, by opening the two doors 16A, 16B that make up the door 16, the office space 11 communicates with the living / dining / kitchen area (room 2) through the doorway 12, i.e., is opened. Therefore, while concentrating on work in the office space 11, the user can hear sounds coming through the doorway 12 behind the seat 4, or check on the state of his / her family in the living / dining / kitchen area, which can be seen through the doorway 12.

[0025] As shown in Fig. 1, desks 3 and seats 4 used by users are arranged in office space 11 surrounded by walls 15. The users sit at the seats 4 and perform work using a computer started up at the desks 3. When the users have finished using the office space 11, they exit the office space 11 and rotate the two doors 16A, 16B that make up the door 16 back to their closed positions, thereby blocking the entrance 12.

[0026] The wall 15 surrounding the work space 11 is U-shaped when viewed from the ceiling, as shown in Fig. 1, and is composed of a pair of mutually opposing first plate members 10A and a second plate member 10B located between the first plate members 10A. The plate members 10A and 10B do not need to be strong structural members that form the main structure of the room 2, but are freestanding when fixed between supporting members such as pillars erected between the floor and ceiling of the room 2. The plate members 10A and 10B are also rigid enough to maintain the flatness of their surfaces so that the sound absorber 17 can be attached smoothly.

[0027] Moreover, sound absorbers 17 are attached to the surfaces of the wall body 15 and the door 16 that face the office space 11. More specifically, a first sound absorber 17A is attached to the surfaces of the first plate-like member 10A and the second plate-like member 10B that constitute the wall body 15 that face the office space 11. Moreover, a first sound absorber 17A is attached to the surfaces of the doors 16A and 16B that constitute the door 16 that face the office space 11.

[0028] With the above-mentioned configuration, sound generated in the office space 11 is absorbed and attenuated by the first sound absorbers 17A provided on the surfaces of the first plate-like member 10A and the second plate-like member 10B that surround the office space 11. In addition, as the sound generated in the office space 11 travels toward the outside of the office space 11 (i.e., toward the living / dining / kitchen area), it passes through the doorway 12 sandwiched between the doors 16A and 16B, at which point it is absorbed by the first sound absorbers 17A provided on the doors 16A and 16B, and is further attenuated. The sound generated in the office space 11 and traveling toward the living / dining / kitchen area is efficiently attenuated, and the volume is at a non-annoying level.

[0029] In order to identify conditions under which the degree of sound attenuation described above is suitable for a user, for example, the attenuation tendency of sound of a certain intensity (volume) generated in the office space 11 until it reaches the room 2 may be identified while changing the sound absorption conditions. Specifically, it is advisable to identify the condition by performing a simulation using an appropriate simulator or by measuring the volume using an actual measuring device while changing parameters such as the type, size, and thickness of the sound absorber 17 and the opening degree of the doors 16A and 16B. Then, once the attenuation tendency for each condition (each combination of parameters) is known, the condition (combination of parameters) that results in a volume that the user prefers can be identified from the above attenuation tendency. When the office space 11 is not in use, the door 16 is kept in a position that blocks the entrance 12 (the "closed" state in FIG. 1). In this case, the doors 16A, 16B, which are in the "open" state, can be rotated toward the office space 11, for example, from a hinge provided near the end of the first plate-like member 10A, to enter the closed state.

[0030] [Second example of building configuration] The door 16 may have a different configuration from that described above. For example, when the office space 11 is in use, the doors 16A and 16B constituting the door 16 may be housed in the office space 11. Here, a second configuration example of the building 1 in this embodiment will be described. Figure 2 is a plan view showing a second configuration example of the building 1 in this embodiment. Here, the state in which the two doors 16A, 16B that make up the door 16 are in the fully open position and the user is using the office space 11 is referred to as "closed use" (middle part of Figure 2). On the other hand, in order to transition from this closed use state to an "open use" state, each of the doors 16A, 16A is slid toward the innermost part 11A of the office space 11 along the surface of each of the first plate-like members 10A.

[0031] The above configuration is realized, for example, by adopting an axis rotation structure (more specifically, a Buddhist altar slider structure) for the two doors 16A and 16B. Specifically, as shown in Fig. 3, a rail 10AX for sliding is fixed to the surface of each of the first plate-shaped members 10A (only one of the first plate-shaped members 10A is shown in Fig. 3), and a plurality of running units 16E that run suspended on the rail 10AX are provided near the upper ends of the doors 16A and 16B. The rail 10AX provided on the first plate-shaped member 10A and the running units 16E provided near the upper ends of the doors 16A and 16B are the accommodation mechanism 20. Of course, the above-mentioned storage mechanism 20 is just one example, and various configurations can be used, such as installing rails extending to the rear portion 11A on the floor surface of the office space 11, and providing the lower ends of the doors 16A, 16B with multiple running units that run on the above-mentioned rails.

[0032] In addition, since the doors 16A and 16B are suspended from the rail 10AX and run, a mechanism is required that allows the fixtures 5, such as hinges or pins that rotatably connect the doors 16A and 16B to the first plate-like member 10A to pass through the rail 10AX while remaining integrated with the doors 16A and 16B. As an example of such a mechanism, as shown in Fig. 4, a running unit 16E is installed on the upper end of each of the first plate-like member 10A and the door 16B, and the running unit 16E is suspended from the rail 10AX and runs sideways.

[0033] The first plate-like member 10A and the door 16B are connected by the jig 5 so as to be freely bent. Therefore, the first plate-like member 10A and the door 16B move together on the rail 10AX toward the entrance 12, and at the end of the rail 10AX, the door 16B protrudes from the rail 10AX and can be bent toward the inside (i.e., moved toward the opening of the wall body 15) with the jig 5 as the starting point. That is, the door 16B can be rotated to close the door 16. In other words, the door 16B, which was bent from the jig 5 outside the rail 10AX to close the door 16, can be pulled back into the rail 10AX and moved laterally by unbending at the end of the rail 10AX and aligning with the first plate-like member 10A, and can be stored toward the back 11A of the office space 11 as it is.

[0034] [Third example of building configuration] Next, a third configuration example of the building 1 in this embodiment will be described. Fig. 5 is a plan view showing the third configuration example of the building 1 in this embodiment, and Fig. 6 is an elevation view showing the third configuration example of the building 1 in this embodiment. In the third configuration example, a structure will be described in which the space above the office space 11 is also covered with the sound absorbing body 17, and sound transmission from the surroundings of the office space 11 or sound leakage from the office space 11 to the surroundings is more effectively suppressed. In this case, a structure is adopted in which a second sound absorbing body 17B is installed on the upper end surface of each of the doors 16A and 16B of the door 16. As a fixing structure between the upper end surfaces of each of the doors 16A and 16B and the second sound absorbing body 17B, for example, a structure in which one end of an L-shaped stay is fixed near the upper end surface of the surface of each of the doors 16A and 16B (the surface facing the office space 11) and the other end is fixed to the surface of the second sound absorbing body 17B (the surface overlooking the office space 11) can be adopted.

[0035] When the doors 16A, 16B, which have the second sound absorbing body 17B fixed to their upper ends, are rotated from a "closed state" in which the doors 16A, 16B block the entranceway 12, and an opening operation is performed, the second sound absorbing body 17B rotates together with the doors 16A, 16B in the space above the office space 11. When the rotation continues and the doors 16A, 16B are fully opened, the second sound absorbing body 17B is fixed in a state covering the upper part of the entranceway.

[0036] On the other hand, when the second sound absorbers 17B rotate in conjunction with the rotation of the doors 16A, 16B described above, a structure is required to prevent the second sound absorbers 17B from colliding with each other, i.e., to avoid interference with each other (hereinafter referred to as an interference avoidance structure).

[0037] There are several possible examples of the interference avoidance structure, and examples thereof include the configurations shown in FIGS. The interference avoidance structure shown in Figures 5 and 6 shows a structure in which the installation heights (heights from the bottom ends of doors 16A, 16B) of second sound absorbing body 17B in each of doors 16A, 16B are configured to differ by at least the thickness of second sound absorbing body 17B. If the installation heights of the second sound absorbing bodies 17B for the doors 16A and 16B are sufficiently different, even when the doors 16A and 16B rotate to open and close the door 16, the second sound absorbing bodies 17B will not come into contact with each other and will be fixed with some overlap in the space above the office space 11, as shown in Figure 6.

[0038] 7 shows an example of an interference avoidance structure (fourth configuration example), in which one of the second sound absorbers 17B installed on each of the doors 16A and 16B has an end face recess 17BY arranged on its end cross section, and the other second sound absorber 17B has an end face protrusion 17BX arranged on its end cross section. When such a structure is adopted, it is preferable that an auxiliary member, such as a funnel-shaped guide whose diameter expands outward from the opening of the end face recess 17BY, is installed on the end face recess 17BY of the second sound absorbers 17B installed on each of the doors 16A and 16B so that the end face recess 17BY and the end face protrusion 17BX can easily fit together.

[0039] In the interference avoidance structure shown in Fig. 7, when the doors 16A, 16B, which have the second sound absorbing body 17B fixed to their upper ends, are rotated from a "closed state" in which the doorway 12 is blocked, and the doors 16A, 16B are opened, the second sound absorbing body 17B rotates together with the doors 16A, 16B in the space above the office space 11. As the rotation continues, the second sound absorbing bodies 17B of the doors 16A, 16B reach a position where their ends come into contact with each other. When the installation heights of the second sound absorbers 17B on the doors 16A and 16B are exactly the same, the ends come into contact with each other as they rotate, and the end protrusions 17BX of one second sound absorber 17B fit seamlessly into the end recesses 17BY of the other second sound absorber 17B. Thereafter, as the doors 16A and 16B rotate further, the end protrusions 17BX slide within the inner spaces of the end recesses 17BY while the second sound absorbers 17B remain fitted together, and finally, when the rotation stops, the second sound absorbers 17B are fixed in the space above the office space 11 with their ends fitted together, i.e., partially overlapping.

[0040] An example of an interference avoidance structure (fifth configuration example) shown in Fig. 8 includes a folding mechanism 17F provided in second sound absorbing body 17B. In this case, as shown in Fig. 8, when doors 16A, 16B go from a "closed state" to a "halfway open" state in which doors 16A, 16B are rotated to set door 16 to an "open" state, and then to a "fully open state", second sound absorbing bodies 17B are unfolded from the folded state manually by a user or by the drive of a motor or the like that unfolds second sound absorbing body 17B. On the other hand, when doors 16A and 16B are rotated inward (i.e., toward office space 11) to place door 16 in the "closed" position, each of second sound absorbing bodies 17B is folded either manually by the user or by the driving of a motor or the like that performs a folding operation.

[0041] A specific example of the folding mechanism 17F described above may be, for example, an automatic folding mechanism for curtains or blinds. In such an automatic folding mechanism, a motor winds up a wire that penetrates the folding object, thereby pulling together the folds 17BZ of the folding object. In addition, a motor pushes out a core rod to which the end and tip of the folding object are fixed in the forward movement direction, thereby moving the folds 17BZ of the folding object away from each other.

[0042] [Variations of sound absorbing materials] Next, variations of the sound absorbing body that can be used in this embodiment will be described. In the above embodiment, the first and second sound absorbers 17A and 17B are configured by sound absorbing panels. However, the sound absorbers may be other than sound absorbing panels, and may be configured by any of sound absorbing panels, porous sound absorbers, vibration type sound absorbers, and resonance type sound absorbers. Porous sound absorbers are materials that have many pores such as capillaries and open cells, such as mineral and plant fibers such as glass wool, rock wool, and kapok. When sound waves reach this porous sound absorber, some of the energy is consumed as heat energy due to friction with the periphery of the pores, viscous resistance, and vibration of the small fibers of the material, and the sound volume after passing through the sound absorber is also attenuated.

[0043] In addition, vibration-type sound absorbers are made of airtight materials such as plywood or canvas, and when sound waves reach them, they cause the board or membrane to vibrate. This causes some of the energy of the sound waves to be consumed by internal friction, and the volume of the sound that passes through the sound absorber is also reduced. In addition, a resonance-type sound absorber is a resonator in the form of a hollow wall with holes, and the air in the hole vibrates violently near the sound resonance frequency of the arriving sound waves, causing part of the energy of the sound waves to be consumed as frictional heat, and also reducing the volume of the sound after it passes through the sound absorber.

[0044] <<Other embodiments>> Although one embodiment of the building of the present invention has been described above, the above embodiment is merely an example for facilitating understanding of the present invention and does not limit the present invention. In other words, the present invention can be modified and improved without departing from the spirit of the present invention. In addition, the present invention naturally includes its equivalents.

[0045] In the above embodiment, the first sound absorber 17A is provided on both the plate-like member and the door, but the first sound absorber 17A only needs to be provided on at least the door 16, and does not necessarily have to be provided on the plate-like member 10. [Explanation of symbols]

[0046] 1. Building 2 rooms 2A Room Space 3 Desk 4 seats 5. Jig 10 Plate-shaped member 10A First plate-shaped member 10B Second plate-shaped member 11 Inner space (work space) 11A (Inner Space) 12 Entrance / exit 15 Wall 16 Doors 16A, 16B units 16C Containment Mechanism 16D (Door) Top Surface 16E Travelling unit 17 Sound absorbing body 17A First sound absorbing body 17B Second sound absorbing body 17BX End face convex part 17BY End face recess 17BZ crease 17C Interference avoidance structure 17D end section 17E (end cross section) recess 17F Folding mechanism

Claims

1. A building, In the room of the building, a wall body is formed by one or more upright plate-like members, the wall body having an inner space which is an office space and an entrance which connects the inner space to the space of the room; A door that can be opened and closed freely at the entrance to separate the interior space from the room space; a first sound absorbing body provided on at least the door out of the plate-like member and the door; A building equipped with:

2. the wall body is composed of a pair of first plate-like members facing each other and a second plate-like member located between the first plate-like members, The building according to claim 1 , wherein the hollow area is a space surrounded by the pair of first plate-like members and a second plate-like member located between the first plate-like members.

3. The door is composed of two double-leaf doors that rotate from the left and right ends of the entrance, The building according to claim 2 , wherein each of the two doors is provided with an accommodation mechanism that slides along the surfaces of the pair of first plate-like members toward the rear of the interior space when in a fully open position.

4. A second sound absorbing body is attached to the upper end surface of each of the two doors, The building according to claim 3 , wherein each of the second sound absorbing bodies is provided with an interference avoidance structure for avoiding interference with each other when the two doors are opened or closed.

5. The interference avoidance structure includes: A structure in which the installation heights of the upper end surfaces of the two doors are different between the second sound absorbing bodies; A structure in which one of the second sound absorbers has a recess in a cross section of an end portion thereof, into which the other second sound absorber can be accommodated from the end portion thereof; and The building according to claim 4, wherein each of the second sound absorbing bodies has a folding mechanism, and when the door is closed, each of the second sound absorbing bodies is folded, and when the door is opened, each of the second sound absorbing bodies is unfolded.

6. The building according to any one of claims 1 to 5, wherein the first sound absorber is any one of a sound absorbing panel, a porous sound absorber, a vibration type sound absorber, and a resonance type sound absorber.

7. The building according to claim 4 , wherein the second sound absorbing body is any one of a sound absorbing panel, a porous type sound absorbing body, a vibration type sound absorbing body, and a resonance type sound absorbing body.

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