JP2005105579A - Sound insulation door and its structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulation door capable of securing both sound insulation and ventilation performance and its structure. <P>SOLUTION: The sound insulation door 1 is roughly constituted of a rectangular frame 15 constituted of a plurality of lateral members 4 arranged in the structural face of a rectangular frame body 2 and a rectangular frame body and a pair of face plates 3a, 3b airtightly connected to the rectangular frame. The face plate 3a is connected to the front face of the rectangular frame 15 and the face plate 3b is connected to the rear face of the rectangular frame 15. The lateral members 4 are arranged in specified distances in the short direction of the rectangular frame body 2, that is in the parallel direction with the upper frame member 7 and the lower frame member 8, the both ends are connected to the vertical frame members 9, 9, the door inside space surrounded by the rectangular frame body 2 and respective face plates 3a, 3b is partitioned into a plurality of divided spaces 21. Further, in the lateral members 4, through holes 11 are formed respectively to be parallel to the longitudinal direction, that is in parallel with the vertical frame member 9. A plurality of divided spaces 21 is continuously connected, via through holes connectedly. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sound insulating door and a sound insulating door structure used when soundproofing and air permeability are required, for example, in a private room or toilet of a house.

  In private rooms and toilets in houses, it is generally necessary to ensure the flow of air for ventilation, for example by undercutting the door or forming an air passage through which air passes, for example, because of the need for ventilation. Is.

  On the other hand, in order to protect the private and reduce the influence of sound on the surroundings, the door may be required to be soundproofed.

Japanese Utility Model Publication No. 5-54792

  However, in order to improve soundproofing, it is desirable to make the door as airtight as possible, but for ventilation, it must be made to ensure airflow, and both soundproofing and airflowing functions. The problem was that it was difficult to construct a door having a slab.

  The present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide a sound insulating door and a sound insulating door structure capable of ensuring both soundproofing and air permeability.

  In order to achieve the above object, the sound insulation door according to the present invention is provided with a plurality of cross members parallel to the short direction of the rectangular frame in the plane of the rectangular frame as described in claim 1. A rectangular frame and a pair of face plates that are air-tightly joined to the front and back surfaces of the rectangular frame, respectively, and a plurality of spaces in the door surrounded by the rectangular frame and the face plate are formed by the cross members. Each of the plurality of divided spaces is provided with a predetermined through hole so that adjacent divided spaces communicate with each other through the respective transverse members. And forming an upper through hole in the upper frame member positioned at the upper position in the built-in posture of the rectangular frame body, and communicating the uppermost divided space among the divided spaces to the outside, Of the rectangular frame body, the lower frame material located in the lower part in the built-up posture Of the divided spaces to form a lower through-hole, in which communicates the bottom of the divided space to the outside.

  Further, the sound insulation door according to the present invention is arranged such that a predetermined partition plate is arranged in each divided space so as to be non-parallel to the face plate and vertical in the built-in state, and the thickness of the air layer in each divided space is increased. It is changed along the short direction of the rectangular frame.

  Further, the sound insulation door according to the present invention is constituted by a folding plate formed by bending the partition plate at the center, and both side edges of the folding plate are respectively provided on both inner side surfaces of the rectangular frame. While joining, the peak side protrusion part in the bending position of the said bending board is joined to the inner surface of the said face plate.

  In the sound insulation door according to the present invention, each of the folded plates is arranged in the divided space so that the folded side is alternated along the longitudinal direction of the rectangular frame.

  In addition, the sound insulation door structure according to the present invention has a sound insulation door according to any one of claims 1 to 4 installed in a door frame, and the sound insulation door is closed. The upper through hole communicates with a non-residential space extending outside the living room and is not communicated with the living room space, and the lower through hole communicates with the non-residential space and communicates with the living room space. In the gap between the sound insulation door and the door frame, the first seal member is disposed on the upper and side edges of the sound insulation door and on the side of the living room, and the sound insulation door and the floor surface In this gap, a second seal member is disposed on the lower edge side of the sound insulation door and on the non-room space side.

  In the sound insulation door structure according to the present invention, a blocking block that closes a gap between a lower end vicinity of the opening side side edge of the sound insulation door and the floor surface is installed on the floor surface.

  When sound propagates from the room space to the non-room space that spreads outside the room, generally sound generated in the room space may pass through the door and leak from the gap between the door frame, In such a conventional technique, although the ventilation of the living room can be secured, the generated sound in the living room cannot be shielded due to the gap between the door frame and the sound in the non-residential space. Is difficult to avoid.

  On the other hand, in the sound insulation door and the sound insulation door structure according to the present invention, the gap between the door frame and the door frame is hermetically configured and the flow path through which air flows in the door interior space is newly constructed, while ensuring ventilation, The sound generated in the room space is attenuated as follows.

  That is, in the sound insulating door and the sound insulating door structure according to the present invention, when the sound generated in the living room space propagates through the door inner space and is transmitted to the non-residential space, first, the lowermost divided space through the lower through-hole. Then, the sound enters, and then the sound enters the adjacent divided space through the through hole provided in the cross member. Hereinafter, the sound propagates alternately through the through hole and the divided space, and finally the sound comes out from the upper through hole to the non-room space.

  In this process, the sound that enters the sound insulation door propagates alternately through the divided space with a large cross-sectional area and through-holes with a small cross-sectional area. In addition, sound energy is attenuated by friction generated when passing through the through hole. In other words, when sound propagates through the sound insulation door, the same effect as a hollow silencer can be obtained, and the sound generated in the room space is attenuated when propagating through the door space. It will be transmitted to the non-living room, and it will be possible to ensure soundproofing.

  Note that when sound generated in a non-room space propagates through the door space to the room space, the direction of sound propagation is reversed, and the sound generated in the room space described above is The same effect as when transmitted to the living room space will be achieved.

  On the other hand, the air in the non-residential space enters the uppermost divided space from the upper through-hole, and passes through the through-hole and the divided space provided in the cross member alternately and exits from the lower through-hole to the indoor space. To go.

  As described above, since the flow path of the air passing vertically is formed in the sound insulation door, it is possible to ensure the air permeability from the non-room space to the room space.

  Needless to say, air permeability from the living room space to the non-residential space is also ensured at the same time.

  As long as the through-hole can communicate with two adjacent divided spaces, the through-hole with respect to the cross-sectional area of the divided space can be used regardless of the configuration. The ratio of the cross-sectional area is appropriately set.

  The same applies to the upper through hole and the lower through hole, so long as the divided space and the outside can be communicated with each other, the configuration is not limited, but the divided so that the sound can be attenuated. The ratio of the cross-sectional areas of the upper and lower through holes to the cross-sectional area of the space is set as appropriate.

  Here, a predetermined partition plate is arranged in each divided space so as to be non-parallel to the face plate and vertical in the built-in state, and the thickness of the air layer in each divided space is set along the short direction of the rectangular frame. In this case, since the thickness of the air layer formed between each face plate and the partition plate is not uniform, it is easy for sound of a specific frequency to pass through the resonance action caused by the double wall. It is possible to solve the problem of transmission loss and improve the sound insulation of the sound insulation door.

  Since the partition plates are arranged so as to be vertical in the built-in state, the mutual communication between the divided spaces, and thus the flow path of the air that passes vertically is maintained as described above. Therefore, there is no concern that air permeability is hindered.

  The partition plate is arranged in each divided space so as to be non-parallel to the face plate and vertical in the built-in state, and the thickness of the air layer in each divided space is changed along the short direction of the rectangular frame. If it can, it is arbitrary how it is configured, for example, it may be configured by a rectangular flat plate, but here, the partition plate is configured by a folded plate formed by folding at the center. Then, both side edge portions of the folded plate may be joined to both inner side surfaces of the rectangular frame body, and the mountain-side protruding portion at the folding position of the folded plate may be joined to the inner surface of the face plate.

  If it does in this way, the workability | operativity at the time of attaching each bending board to division space will improve. That is, when manufacturing a sound insulation door, first, one face plate is joined to a rectangular frame, then a partition plate is attached, and then the other face plate is joined. Therefore, when attaching the folding plate, simply placing the folding plate in the rectangular frame, it can be stably placed so that it is not parallel to the face plate. It can be attached.

  Here, each folding plate may be arranged so that all the folding sides are on the front side or all on the back side, but each folding plate is arranged on the side of the rectangular frame. You may arrange | position to each of several division space so that it may become alternate along a longitudinal direction.

  If it does in this way, it will become possible to make a sound insulation door into a symmetrical structure, and the curvature of a sound insulation door can be prevented beforehand.

  In the sound insulation door structure according to the present invention, the sound insulation door according to any one of claims 1 to 4 is installed in the door frame, and the sound insulation door is closed, and the upper through hole is in the room. Among the gaps between the sound insulation door and the door frame, it communicates with the non-residential space that spreads outside, and does not communicate with the indoor space and the lower through hole communicates with the non-residential space and communicates with the indoor space. A first seal member is arranged on the upper edge side and side edge side of the sound insulation door and on the side of the living room, and the lower edge side of the sound insulation door and the non-room space in the gap between the sound insulation door and the floor surface A second seal member is disposed on the side.

  Therefore, leakage of sound through the gap between the sound insulation door and the door frame is prevented, and the communication in the upper through hole, the through hole, and the lower through hole described above is performed by the first seal member and the second seal. It is not obstructed by the members, and the ventilation of the living room is sufficiently ensured as described above.

  The first seal member is connected between the sound insulation door and the door frame so that the upper through hole communicates with the non-room space extending outside the room and is not communicated with the room space with the sound insulation door closed. If it can arrange | position in a clearance gap, how to comprise is arbitrary.

  The second seal member can be disposed in the gap between the sound insulating door and the floor so that the lower through hole is not in communication with the non-residential space and communicates with the indoor space with the sound insulating door closed. If it is, how to comprise is arbitrary. For example, it is possible to use an undersea airtight device commercially available from Pinch Block Co., Ltd.

  Here, when a block is installed on the floor that closes the gap between the lower edge of the opening side edge of the sound insulation door and the floor, the side of the sound insulation door is difficult to ensure airtightness. It is possible to reliably close the gap in the vicinity of the lower end of the edge and further improve the soundproofing property.

  Embodiments of a sound insulation door and a sound insulation door structure according to the present invention will be described below with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

  1 and 2 are views showing a sound insulating door 1 according to the present embodiment. FIG. 1 is a perspective view, FIG. 2A is a vertical sectional view, and FIG. 2B is a line AA in FIG. (C) is sectional drawing which follows the BB line of (a). As shown in these drawings, the sound insulation door 1 according to the present embodiment includes a rectangular frame 2 composed of a rectangular frame 2 and a plurality of cross members 4 arranged in the surface of the rectangular frame, The pair of face plates 3a and 3b are airtightly joined to the rectangular frame. The face plate 3a is joined to the front surface of the rectangular frame 15, and the face plate 3b is joined to the back surface of the rectangular frame 15. .

  The pair of face plates 3a and 3b is composed of a rectangular medium fiber board (MDF) 5 and a damping rubber 6 bonded to the inner surface side of the medium fiber board, that is, the side bonded to the rectangular frame 15. Each is composed.

  The rectangular frame 2 is generally composed of an upper frame member 7 positioned at the upper position, a lower frame member 8 positioned at the lower portion, and a pair of vertical frame members 9 and 9 positioned on both sides. Each end is joined to each other so as to have a shape. A finishing material 10 is attached to the outer side surfaces of the pair of vertical frame members 9, 9.

  The horizontal members 4 are arranged at predetermined intervals so as to be parallel to the lateral direction of the rectangular frame 2, that is, the upper frame member 7 and the lower frame member 8, and both ends thereof are joined to the vertical frame members 9, 9. The interior space of the door surrounded by the rectangular frame 2 and the face plates 3a and 3b is partitioned into a plurality of divided spaces 21. Each transverse member 4 is formed with a through hole 11 so as to be parallel to the longitudinal direction of the rectangular frame 2, that is, the vertical frame member 9, and a plurality of divided spaces 21 are formed through the through hole. Are connected continuously.

  An upper through-hole 12 is formed in the upper frame member 7 of the rectangular frame 2 so as to be parallel to the vertical frame member 9, and among the divided spaces 21, the uppermost divided space 21 communicates with the outside. In addition, a lower through-hole 13 is formed in the lower frame member 8 of the rectangular frame 2 so as to be parallel to the vertical frame member 9. The space 21 is communicated with the outside.

  The through hole 11, the upper through hole 12, and the lower through hole 13 are formed in a cylindrical shape, and a plurality of the cross members 4, the upper frame member 7, and the lower frame member 8 are provided at equal intervals.

  In each divided space 21, folding plates 14 a and 14 b as partition plates are arranged so as to be vertical in the built-in state, and are arranged non-parallel to the face plates 3 a and 3 b, thereby providing each divided space. The thickness of the air layer 21 is changed along the short direction of the rectangular frame 2.

  As shown in FIG. 2 (b), the folding plate 14a is formed by bending at the center so that the cross-section becomes a U-shaped cross section, and both side edges of the folding plate are rectangular frames. The inner side surface of each vertical frame member 9 of the body 2 is joined in the vicinity of the rear face plate 3b, and the mountain-side protruding portion at the folding position of the folding plate 14a is joined to the inner surface of the front face plate 3a. It is.

  As shown in FIG. 2 (c), the folding plate 14b is formed by being bent at the center so that the cross-section has a U-shape, similar to the folding plate 14a. Both side edge portions are joined to the inner side surface of each vertical frame member 9 of the rectangular frame body 2 and in the vicinity of the face plate 3a on the front side, and the mountain side protruding portion at the folding position of the folding plate 14b is connected to the rear side. It is joined to the inner surface of the face plate 3b.

  Here, as shown in FIG. 2 (a), the folding plates 14a and 14b are arranged in the divided spaces 21 so that their folding sides alternate along the longitudinal direction of the rectangular frame 2. It is.

  In addition, although each division | segmentation space 21 will be divided into the front side space 22 and the back side space 23 by each folding plate 14a, 14b, it is so that the folding plates 14a, 14b may become perpendicular | vertical in a built-in state. Therefore, the bent plates 14 a and 14 b do not hinder communication between the divided spaces 21 and 21, and the adjacent divided spaces 21 and 21 are maintained in mutual communication via the through holes 11.

  FIGS. 3A and 3B are diagrams showing the sound insulation door structure 31 when the sound insulation door 1 is used as a toilet door which is a living room. FIG. 3A is a front view, and FIG. 3B is a CC line of FIG. Sectional drawing which follows, (c) is sectional drawing which follows the DD line | wire of (a). As shown in the figure, the sound insulation door structure 31 according to the present embodiment is installed in a door frame 32 with the sound insulation door 1 as a door of the toilet, and the front side of the sound insulation door 1 extends outside the toilet. The hallway side which is a space and the back side of the sound insulation door 1 are the toilet side which is a living room space.

  In the gap between the sound insulation door 1 and the door frame 32, the upper through hole 12 communicates with the corridor in the state where the sound insulation door 1 is closed on the upper edge side and both side edge sides of the sound insulation door 1. The first seal member 33 is disposed on the toilet side so as not to communicate. The first seal member 33 may be attached by bonding to the inner surface of the door frame 32, for example.

  The first seal member 33 may be appropriately selected from commercially available door packing, for example, so as to close the gap and become airtight when the sound insulating door 1 is closed.

  On the other hand, in the gap between the sound insulation door 1 and the floor surface 36, the second seal member 34 is disposed on the hallway side so that the lower through hole 13 is not communicated with the hallway and communicates with the toilet on the lower edge side of the sound insulation door 1. It is arranged.

  The second seal member 34 can use a lower heel air-tight device commercially available from Pinch Block Co., Ltd., and the lower heel air-tight device is configured so that the rubber body can be moved up and down, whereby a sound insulating door is formed. It is possible to close the gap between the floor 1 and the floor surface 36, and it is possible to deal with gaps of various sizes up to the lifting stroke.

  Here, a closing block 35 is installed on the opening side side edge of the sound insulation door 1, that is, the floor 36 near the lower end opposite to the suspension source of the sound insulation door 1, and the sound insulation door 1 is closed. Thus, the gap between the opening side lateral edge of the sound insulation door and the floor surface 36 is closed.

  The closing block 35 is configured by forming foamed urethane or foamed rubber into a prismatic shape in accordance with the size of the gap.

  When manufacturing the sound insulating door 1 according to the present embodiment, first, the damping rubber 6 is attached to the inner surface of the medium fiberboard 5 constituting the front face plate 3a with an adhesive. On the other hand, the cross frame 4 in which the through hole 11 is formed is joined to the rectangular frame 2 in which the upper through hole 12 and the lower through hole 13 are formed to manufacture the rectangular frame 15.

  Next, the rectangular frame 15 is airtightly joined to the inner surface of the front face plate 3a.

  Next, the folding plates 14a and 14b, which are partition plates, are respectively attached. At this time, since the partition plate is constituted by the folding plates 14a and 14b, the folding plate can be stably arranged so as to be non-parallel to the face plate 3a only by placing the folding plate in the rectangular frame 15. .

  Next, the damping rubber 6 is adhered to the inner surface of the medium fiber board 5 constituting the back side face plate 3b with an adhesive, and is disposed on the back side of the rectangular frame 15, so that the rectangular frame and Join hermetically.

  In the sound insulation door 1 and the sound insulation door structure 31 according to the present embodiment, the clearance between the sound insulation door 1 and the door frame 32 is configured to be airtight, and ventilation is ensured by providing a flow path through which air flows in the door interior space. However, the sound generated in the toilet is attenuated as follows.

  That is, when the sound generated in the toilet propagates through the space in the door and is transmitted to the hallway, first, the sound enters the lowermost divided space 21 through the lower through-hole 13, and then passes through the side member 4. Sound enters the adjacent divided space 21 through the hole 11. Hereinafter, sound propagates alternately through the through-holes 11 and the divided spaces 21, and finally sound comes out from the upper through-hole 12 to the hallway.

  In this process, the sound that enters the sound insulating door 1 is alternately propagated through the divided space 21 having a large cross-sectional area and the through-hole 11 having a small cross-sectional area. Sound energy is attenuated by sound reflection, friction generated when passing through the through-hole 11, and the like.

  In addition, when propagating through the divided space 21, the sound propagates from the lower side to the upper side of the sound insulating door 1 while the sound is multiple-reflected on the inner surface side of the vibration damping rubber 6. Also occurs. The damping action by the vibration damping rubber is an action and effect that cannot be achieved by a conventional flash door in which sound passes through the door space in a substantially orthogonal direction. Therefore, the sound insulation performance of the sound insulation door 1 can be set to a desired performance by appropriately selecting the specifications such as the thickness of the damping rubber and the type of rubber.

  In addition, when the sound generated in the corridor propagates through the space in the door and is transmitted to the toilet, the sound is transmitted in the opposite direction, and the sound generated in the toilet is transmitted to the corridor. There will be an effect.

  On the other hand, by operating a mechanical ventilation device such as a ventilation fan provided in the toilet, the pressure in the toilet becomes negative compared to the hallway. Therefore, the air in the corridor enters the uppermost divided space 21 from the upper through hole 12 and alternately passes through the through holes 11 and the divided spaces 21 provided in the cross member 4 to the toilet from the lower through hole 13. Thus, the inside of the toilet is ventilated by the air flowing from the hallway side to the outside.

  Note that the direction in which the sound generated in the toilet propagates in the corridor is opposite to the direction of ventilation, but the sound propagation speed is overwhelmingly higher than the flow speed of ventilation, so the difference in direction described above is not a problem. Not.

  Further, in the sound insulating door 1 and the sound insulating door structure 31 according to the present embodiment, the thickness of the air layer formed between the face plates 3a and 3b and the bent plates 14a and 14b is not uniform. The problem of transmission loss that the sound of a specific frequency easily passes due to the resonance effect caused by the phenomenon is solved.

  That is, in a door having a conventional structure, such as a flush door, in which the face plates face each other, the air layer inside acts as an air spring, so that the face plates vibrate greatly at a natural frequency depending on the space between the face plates.

  In contrast to such a conventional structure, in the present embodiment, a situation in which the thickness of the air layer changes in the short direction by the bent plates 14a and 14b described above, and thus resonates at a specific natural frequency is avoided. The

  Since the folding plates 14a and 14b are arranged so as to be vertical in the built-in state, the mutual communication between the divided spaces 21 and thus the flow path of the air that passes vertically is maintained as described above. The Therefore, there is no concern that air permeability is hindered.

  Further, when the sound in the toilet passes through the sound insulation door 1 to the hallway side, if it is a normal flush door, it is in an airtight state, in other words, passes through the door interior space where the compression and expansion of air is restricted. Therefore, the constraint of such compression and expansion becomes an air spring, and the resonance action cannot be avoided. However, in the present embodiment, by providing the upper through hole 12 and the lower through hole 13, The space allows the compression and expansion of air, the resonance action by the air spring is reduced, and the transmission loss of the sound insulating door 1 is greatly increased in combination with the action of the folding plates 14a and 14b described above.

  Here, if the out-of-plane rigidity of the face plate 3a on the corridor side of the sound insulating door 1 is set higher than the out-of-plane rigidity of the face plate 3b on the toilet side, when the sound in the toilet passes through the sound insulating door 1, the face plate 3a. It becomes possible to suppress the secondary radiation due to the out-of-plane vibration, and to further increase the transmission loss of the sound insulation door 1. Incidentally, since the rigidity of the sound insulation door 1 is improved by the above-described bent plates 14a and 14b, there is no possibility that the sound insulation door is warped.

  As described above, according to the sound insulating door 1 and the sound insulating door structure 31 according to the present embodiment, the upper through hole 12 and the lower through hole 13 are formed in the upper frame member 7 and the lower frame member 8 of the rectangular frame 2, respectively. Since the plurality of divided spaces 21 are continuously communicated through the through holes by forming the through holes 11 in the respective cross members 4, the sound propagates through the sound insulating door 1. At the same time, the same effect as a hollow silencer can be obtained, and the sound generated in the toilet is attenuated when propagating through the interior space of the door and transmitted to the corridor, ensuring soundproofing. It becomes. On the other hand, since a flow path of air that passes vertically is formed in the sound insulating door 1, it is possible to ensure air permeability from the corridor to the toilet.

  Therefore, according to the sound insulation door 1 and the sound insulation door structure 31 according to the present embodiment, the inside of the toilet can be ventilated while improving the soundproofing property against the sound generated in the toilet, and an extremely excellent effect as a sound insulation door for the toilet is achieved. Play.

  Further, according to the sound insulating door 1 and the sound insulating door structure 31 according to the present embodiment, the folded plates 14a and 14b are arranged as the partition plates in the respective divided spaces 21, and the thickness of the air layer in each divided space 21 is set to a rectangular frame. Since it is changed along the short direction of the body 2, the thickness of the air layer formed between the face plates 3a, 3b and the bent plates 14a, 14b is not uniform, and the resonance action caused by the double wall Therefore, it is possible to solve the problem of transmission loss that the sound of a specific frequency easily passes and to improve the soundproofing property of the sound insulation door 1.

  Moreover, according to the sound insulation door 1 and the sound insulation door structure 31 according to the present embodiment, the partition plate is configured by the folding plates 14a and 14b. Therefore, the folding plate 14a is installed in the rectangular frame 15 when the folding plate is attached. , 14b can be stably arranged so as to be non-parallel to the face plates 3a, 3b, and workability when attaching the folding plates 14a, 14b is improved.

  Moreover, according to the sound insulation door 1 and the sound insulation door structure 31 according to the present embodiment, the divided spaces 21 are arranged such that the folding plates 14 a and 14 b are alternately arranged along the longitudinal direction of the rectangular frame 2. Therefore, it is possible to make the sound insulating door 1 symmetrical with respect to the vertical plane, and to prevent the sound insulating door 1 from warping.

  Further, according to the sound insulation door structure 31 according to the present embodiment, the sound insulation door 1 is installed in the door frame 32 and the sound insulation door 1 is closed, and the upper through hole 12 communicates with the hallway and is not in the toilet. Since the first seal member 33 and the second seal member 34 are arranged so that the lower through-hole 13 is not communicated with the corridor and communicates with the toilet, the clearance between the sound insulating door 1 and the door frame 32 is provided. The leakage of sound through the first through hole 12, the through hole 11, and the lower through hole 13 can be prevented by the first seal member 33 and the second seal member 34. It is not hindered and the toilet can be ventilated sufficiently.

  In addition, according to the sound insulation door structure 31 according to the present embodiment, since the closing block 35 that closes the gap between the lower end vicinity of the opening side side edge of the sound insulation door 1 and the floor surface 36 is installed on the floor surface 36, Therefore, it is possible to reliably close the gap in the vicinity of the lower end of the opening side side edge portion of the sound insulating door 1 where it is difficult to ensure the performance, and to further improve the soundproofing property.

  In the present embodiment, the folding plates 14a and 14b are arranged in the divided space 21 so that the folding side is alternated along the longitudinal direction of the rectangular frame 2, but instead of this, a sound insulating door is provided. In the case where the warp hardly occurs, the folding side of each folding plate may be all joined to the front face plate, or may be arranged to be joined to the back face plate.

  Moreover, in this embodiment, although the partition plate was comprised by the bending plates 14a and 14b, a partition plate is arrange | positioned so that it may become perpendicular | vertical in a built-up state in each division space so that it may become non-parallel to a face plate. As long as the thickness of the air layer in the space can be changed along the short direction of the rectangular frame, the configuration is arbitrary, for example, it is bent so that the cross section is W-shaped. It may be configured by a rectangular flat plate without being bent.

  Moreover, in this embodiment, it was comprised so that the problem of the transmission loss by the resonance effect resulting from a double wall might be eliminated by installing the bending plates 14a and 14b which are partition plates, However, The influence by this resonance effect If it is sufficiently small or acceptable, the partition plate may be omitted.

  Moreover, in this embodiment, although it comprised so that the blockade block 35 which block | closes the clearance gap between the lower end vicinity of the opening side side edge part of the sound insulation door 1 and a floor surface may be installed in a floor surface, in addition to this, a sound insulation door It may be possible to install a block block on the floor surface that closes the gap between the lower end of the suspension side edge and the floor surface. If such a gap does not occur, all the block blocks may be omitted. It doesn't matter.

  In the present embodiment, the case where the living room is a toilet has been described, but it goes without saying that the living room is not limited to a toilet.

  Since the effect of the folding plates 14a and 14b according to the present embodiment has been confirmed by experiments, such experiments will be described below.

  There are two types of sound insulation doors used for the test: a test door A using the bent plate according to the present embodiment, and a test door B obtained by removing the bent plate from the test door A.

  The test doors A and B are composed of a rectangular frame and a pair of face plates that are air-tightly joined to the front and back surfaces of the rectangular frame.

  Each face plate is composed of 3mm thick medium fiberboard with 2mm thick damping rubber attached to the inner surface, and the rectangular frame is made of 24mm thick wood for testing. The thickness of doors A and B is 34 mm each.

  In the rectangular frame, six cross members are arranged at equal intervals in the surface of a 592 × 1982 mm rectangular frame so as to be parallel to the lateral direction of the rectangular frame. A space in the door surrounded by the frame body and the face plate is partitioned into seven divided spaces by each cross member.

  The upper frame material and the lower frame material of the rectangular frame have 23 upper and lower through-holes each having a diameter of 16 mm, and each lateral member has a 16-mm diameter through-hole. Each of them is formed at equal intervals of 23 pieces.

  Here, in the test door A, folding plates made of medium-sized fiberboard with a thickness of 3 mm are arranged in each divided space so as to be vertical in the built-in state. The plates are arranged so that their folding sides are alternated along the longitudinal direction of the rectangular frame.

  Such test doors A and B will be installed in a door frame provided on a short-side wall of a 910 × 1820 × 2450 mm room assuming a toilet. With the doors A and B closed, the upper through hole communicates with the external space that extends outside the living room, and does not communicate with the living room side, while the lower through hole extends out of the living room and does not communicate with the external space. The first seal member is disposed on the side of the room on the upper edge side and the side edge side of the test door in the gap between the test doors A and B and the door frame so as to communicate with the side. In the gap between the test doors A and B and the floor, the second seal member is disposed on the lower edge side of the test doors A and B and on the external space side. In addition, a blocking block that closes the gap between the vicinity of the lower end of the open side edge of the test doors A and B and the floor surface is installed on the floor surface.

  Next, an experimental method will be described. First, as shown in FIG. 4, a speaker 42 as a sound source and a microphone 43 on the sound source side are installed in a living room 41 to which the test door A or B is attached, and the test door A is outside the living room 41. Alternatively, a microphone 44 on the sound receiving side is also installed in the vicinity of B.

  Note that the speaker 42 is installed so as to be obliquely upward in a 45 degree direction toward the corner on the back side of the living room 41. In addition, five microphones 43 on the sound source side are uniformly installed in the living room 41, and five microphones 44 on the sound receiving side are uniformly installed at positions 250 mm away from the test door A or B.

  Next, sound of various frequencies is generated from the speaker 42, and the sound pressure level is measured by the sound source side microphone 43 installed in the living room 41 and the sound receiving side microphone 44 installed outside the living room 41. The frequency of the sound to be generated was 125, 250, 500, 1K, 2K, 4K (Hz).

  Next, a sound pressure level difference (dB) between the inside of the room 41 on the sound source side and the outside of the room 41 on the sound receiving side is obtained from the measurement results of the microphones 43 and 44. In addition, the measurement was performed according to the measuring method of the air pressure blocking performance of a building according to JIS A 1417: 2000.

  FIG. 5 is a graph showing the sound pressure level difference between the inside of the room 41 and the outside of the room 41 obtained from such measurement. (A) is the measurement result of the test door B, and (b) is the test. It is a measurement result of door A. As shown in the figure (a), in the test door B without the bent plate, the difference in the internal and external sound pressure level at a frequency of 250 Hz is 13 dB, which is lower than that at other frequencies, which is caused by the double wall. It is considered that the resonance action is caused. For this reason, the sound insulation grade which is a parameter | index of the soundproof performance of a door will become low with D-15.

  On the other hand, as shown in FIG. 5B, in the test door A in which the bent plate is arranged, the difference between the internal and external sound pressure levels at a frequency of 250 Hz is 20 dB, and in the vicinity of 250 Hz generated in the test door B. The decrease in the soundproofing performance of the test door A is improved. Therefore, it can be seen that a sound insulation grade D-25 can be obtained, and that a door having more excellent soundproofing performance can be obtained by arranging a bent plate.

Next, in order to confirm the air permeability of the test door A, an experiment was conducted to measure the pressure loss with respect to a predetermined passing air volume. FIG. 6 is a graph showing the relationship between the passing air volume (m ³ / h) and the pressure loss (mmH ₂ O), where ● is the test door A and ▲ is the standard door measurement result. The standard door is attached so that a 5 mm undercut is formed, and ventilation is performed through a gap around the door.

As shown in the figure, in the standard door, the increase in the pressure loss with respect to the increase in the passing air volume is small, whereas in the test door A, the increase in the pressure loss with respect to the increase in the passing air volume is large and the passing air volume is small. Among them, the pressure loss is smaller than that of a standard door, but the pressure loss is larger than that of a standard door when the passing air volume increases. Here, the intersection point α between the measurement result of the measurement results and the standard door of the test door A is 21.49m ^{3 /} h, since the required toilet ventilation is about 20 m ^{3 /} h It can be said that the test door A has sufficient air permeability to be used as a toilet door.

The perspective view which showed the sound insulation door which concerns on this embodiment. It is the figure which showed the sound insulation door concerning this embodiment, (a) is a vertical sectional view, (b) is sectional drawing which follows the AA line of (a), (c) is the BB line of (a). FIG. It is the figure which showed the sound insulation door structure which concerns on this embodiment, (a) is a front view, (b) is sectional drawing in alignment with CC line of (a), (c) is DD line of (a). FIG. The layout which showed the mode of the experiment which confirmed the effect of the bending board. The graph which showed the measurement result of the experiment which confirmed the effect of the bending board. The graph which showed the relationship between passing air volume and pressure loss.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sound insulation door 2 Rectangular frame 3a, 3b Face plate 4 Cross member 7 Upper frame material 8 Lower frame material 11 Through-hole 12 Upper through-hole 13 Lower through-hole 14a, 14b Bending plate (partition plate)
15 rectangular frame 21 divided space 31 sound insulation door structure 32 door frame 33 first seal member 34 second seal member 35 closing block 36 floor surface

Claims (6)

A rectangular frame in which a plurality of cross members parallel to the transverse direction of the rectangular frame are arranged in the composition surface of the rectangular frame, and a pair of airtightly joined to the front and back of the rectangular frame, respectively It is a sound insulating door consisting of a face plate, and a space in the door surrounded by the rectangular frame body and the face plate is partitioned into a plurality of divided spaces by the cross members, and among the plurality of divided spaces, A predetermined through hole is formed in each cross member so that adjacent divided spaces communicate with each other through each cross member, and an upper frame located at the upper part in the built-up posture of the rectangular frame body An upper through hole is formed in the material so that the uppermost divided space of the divided spaces communicates with the outside, and a lower through hole is formed in the lower frame material positioned at the lower position in the built-up posture of the rectangular frame body. Among the divided spaces to communicate the lowermost divided space to the outside Sound insulation door, characterized in that it was. A predetermined partition plate is arranged in each divided space so as to be non-parallel to the face plate and vertical in the built-in state, and the thickness of the air layer in each divided space is set in the short direction of the rectangular frame. The sound insulation door according to claim 1, which is changed along the line. The partition plate is formed of a folded plate formed at the center, and both side edges of the folded plate are joined to the inner side surfaces of the rectangular frame, and the folded plate is folded. The sound insulation door according to claim 2, wherein a peak side protruding portion at a bending position is joined to an inner surface of the face plate. The sound insulation door according to claim 3, wherein the folding plates are arranged in the divided spaces so that the folding side is alternated along the longitudinal direction of the rectangular frame. A soundproof door according to any one of claims 1 to 4 is installed in a door frame, and the upper through hole extends outside the living room in a state where the soundproof door is closed. Of the gap between the sound insulating door and the door frame, the upper part of the sound insulating door is not communicated with the inner space and the lower through-hole communicates with the non-residential space and communicates with the indoor space. The first seal member is disposed on the edge side and the side edge side and on the side of the living room, and the lower edge side of the sound insulating door and the non-room space side of the gap between the sound insulating door and the floor surface A sound insulating door structure characterized in that a second seal member is disposed on the door. The sound insulating door structure according to claim 5, wherein a blocking block that closes a gap between a lower end vicinity of the opening side side edge of the sound insulating door and the floor surface is installed on the floor surface.

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