JP2012202073A - Ventilating and soundproof door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a ventilating and soundproof door that satisfies both ventilation and sound insulation while achieving prevention of a deterioration inside the door and maintenance of sound insulation performance of the door itself.SOLUTION: A ventilation passage 24, the one end of which communicates with a front-side opening 21 opened on the front side of a door A, the other end of which communicates with a back-side opening 22 opened on the back side of the door A and which provides ventilation between both the openings 21 and 22, is formed in each of both a location to an upper end and a location to a lower end inside the door A. The ventilation passage 24 is extended to the outside of the back-side opening 22 inside the door A, and a sound absorbing space section S is constituted in an extended area.

Description

  The present invention relates to a ventilated soundproof door used for a building such as a house, and more particularly relates to a door with improved sound insulation without impairing breathability.

  In recent years, in order to deal with the problem of sick houses caused by formaldehyde contained in paints and adhesives used for interior finishing of houses, in accordance with the revision of the Building Standard Law, a certain degree of air permeability is maintained even when the door is closed. It is required to ensure.

And when it ventilates continuously throughout the day, that is, for 24 hours continuously, it corresponds by providing an opening (loud or undercut) with an effective opening area of 100 to 150 cm ^{2 on} the door as a ventilation path in the door. be able to.

  However, there has been a problem that noise from the outside and sound generated in the room leaks out from the opening, and in particular, there is a problem that the sound generated in the toilet leaks into the adjacent corridor or room.

  Conventionally, for example, those shown in Patent Documents 1 to 3 have been proposed as a ventilation soundproof door for satisfying both such ventilation and soundproofing.

  Although these proposals differ in detail structure, basically the opening portions provided at the top and bottom of the door open toward the indoor space and the outdoor space located on both sides of the door, respectively, and the opening portion is the door. This is a structure in which air moves between the interior and the exterior through a vent passage formed in the interior and communicating with the top and bottom.

JP-A-9-235960 JP 2005-105579 A JP 2007-113307 A

  However, as in these proposed examples, if a ventilating path for soundproofing located in the upper and lower positions inside the door is provided, the venting path becomes a long and large space (venting space) over almost the entire door. As a result, dirty air or air that contains a lot of moisture will pass through the ventilation space for a long time, and the ventilation space is more likely to get dirty or moist, which causes the door to deteriorate from the inside. It becomes easy.

  In addition, a cavity as a ventilation space is formed almost entirely inside the door, which not only reduces the strength of the door, but also increases the sound insulation as the door surface density increases (heavy). It is unavoidable that the soundproofing property of the device itself deteriorates.

  The present invention has been made in view of such various points, and an object of the present invention is to devise the structure of the door to solve these problems and to obtain a ventilation and soundproof door satisfying both ventilation and soundproofing. There is in doing so.

  In order to achieve the above object, the present invention is characterized in that the ratio of the air passage formed inside the door to the entire door is reduced and a sound absorbing structure communicating with the air passage is employed. .

  Specifically, in the first invention, one end communicates with a surface side opening that opens on the door surface, and the other end communicates with a back surface side opening that opens on the back surface of the door and ventilates between both openings. A ventilation path is formed on at least one of the upper end side and the lower end side inside the door, the ventilation path extends outside the back side opening inside the door, and a sound absorbing space is configured in the extension region. It is characterized by that.

  In the present invention, an air passage is formed inside the door, and this air passage communicates with the front surface side opening and the back surface side opening of the door. It flows to the space on the back side of the door through the road and the back side opening, or flows in the opposite direction. This makes it possible to ensure ventilation between the spaces on both sides of the door.

  In addition, since the sound absorbing space portion including the extending portion of the ventilation path is provided in the door, the sound on the back side of the door (or the sound on the front side) is transmitted to the front side of the door (or the back side of the door) via the ventilation path. At this time, the sound absorption is attenuated while interfering in the sound absorption space, and thus the sound propagation between both sides of the door can be suppressed.

  Then, by changing the volume of the sound absorbing space, it is possible to correspond to a desired sound absorbing region (low sound or high sound).

  Therefore, unlike the conventional case, there is no need for a large hollow ventilation space inside the door, and due to the large ventilation space, dirty or moist air does not pass through the ventilation space inside the door. Therefore, the inside of the door is not deteriorated, the weight of the door is not reduced by hollowing out the inside of the door, and the sound insulation performance of the door itself can be maintained. Therefore, it is possible to achieve sound insulation of the door while preventing deterioration inside the door and maintaining the sound insulation performance of the door itself.

  According to a second aspect, in the first aspect, the air passage is formed near both the upper end and the lower end inside the door, and the sound absorbing space is provided continuously in each air passage. It is characterized by.

  According to the present invention, it is possible to achieve a sound insulation and soundproofing effect while securing the air flow rate near both the upper end and the lower end of the door, and each effect is doubled compared to the first invention.

  According to a third invention, in the first or second invention, a sound absorbing material is accommodated in the sound absorbing space.

  In this invention, the sound insulation and soundproofing effects can be further enhanced by the combined use of the sound absorbing material accommodated in the sound absorbing space. Further, the frequency band for absorbing sound can be adjusted by the volume of the sound absorbing space.

  As described above, according to the first aspect of the present invention, an air passage communicating with the door surface side opening and the door rear surface side opening is provided inside the door, and the extending region of the air passage is used as the sound absorbing space. Thus, it is possible to ensure ventilation between the spaces on both sides of the door and prevent deterioration due to a large ventilation space inside the door. In addition, since the door does not become lighter than necessary (since the cavity inside the door does not become large), the sound absorbing space part absorbs and suppresses the sound transmission between both sides of the door while maintaining the sound insulation performance of the door itself. can do.

  According to the second aspect of the invention, by forming the air passage having the sound absorbing space portion near both the upper end and the lower end inside the door, it is possible to increase the air flow while maintaining the sound insulation and sound insulation effects.

  According to the third invention, by accommodating the sound absorbing material in the sound absorbing space portion, the sound insulation and soundproofing effects can be further enhanced, and the frequency band for absorbing sound can be adjusted by the volume of the sound absorbing space portion.

It is an expanded sectional view showing an important section of a ventilation soundproof door concerning one embodiment. It is an expanded sectional view of a louver. It is a front view which shows the back side of a louver frame. It is a front view which shows the front side of a louver frame. It is a front view of the flame | frame inside the door in one Embodiment. It is a front view of ventilation sound insulation concerning one embodiment. It is a figure which shows the sound insulation performance of a ventilation soundproof door when a sound source is made into pink noise. It is a figure which shows the soundproofing performance of the ventilation soundproofing door when the sound source is the sound of washing in the toilet. It is a figure which shows the soundproof performance of the ventilation soundproof door when the sound source is the action sound of the man in the toilet. It is the FIG. 1 equivalent view of the ventilation soundproof door which concerns on other embodiment. It is the FIG. 5 equivalent view of the flame | frame inside the door in other embodiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The following description of the embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its use at all.

  FIG. 6 shows the overall configuration of the ventilation soundproof door A according to the embodiment of the present invention, as viewed from the front side. The door A has a vertically long rectangular shape, and as shown in an enlarged view in FIG. 1, a front plate 1 facing the outdoor space R1 (for example, a corridor) and a back surface facing the indoor space R2 (for example, a toilet). A face plate 2 is provided. The double-sided plates 1 and 2 have the same shape and are integrally attached to the front and back of the frame 8 as shown in FIG. In addition, although the door A has mentioned as an example what partitions off a toilet and the space (corridor) of the outer side, it cannot be overemphasized that it may be another indoor or outdoor door.

  As shown in FIG. 6 again, a knob attaching portion 4 for attaching a door knob (not shown) and a box lock (not shown) are attached to the left side of the door A in the center of the figure in the height direction. For this purpose, a lock mounting portion 5 is formed side by side. This door A is a type of door that swings around the attached side as a rotation center with the side on the right side in FIG. 6, which is the opposite side of the knob attaching portion 4, attached to a door frame (not shown).

  The frame 8 of the door A will be described with reference to FIG. 5. The frame 8 has the same shape as each of the face plates 1 and 2, and a pair of left and right vertical frames 9 that extend in the vertical direction and form left and right sides (long sides). , 9 and a pair of upper and lower horizontal frames 10, 10 extending in the horizontal direction and forming upper and lower sides (short sides) are coupled and fixed in a vertically long rectangular frame shape.

  On the lower side of the upper horizontal frame 10 and near the upper end of the door A, a pair of upper and lower horizontal rails 11 and 11A extending in the horizontal horizontal direction are arranged with a predetermined interval. The left and right end portions of the left and right are coupled to the left and right vertical frames 9,9. Between the upper horizontal frame 11 and the upper horizontal frame 10, four short vertical beams 12, 12,... Extending in the vertical direction are arranged in the horizontal direction, and the upper and lower ends are respectively arranged in the horizontal beam 11 and the upper horizontal frame 10. These vertical bars 12, 12,... Are partitioned into five spaces (ranges) between the upper horizontal rail 11 and the upper horizontal frame 10, and the spaces at the left and right ends thereof are cored. Materials 13 and 13 are filled.

  A pair of left and right vertical bars 14 and 14 extending in the vertical direction are joined to the left and right ends between the upper and lower horizontal bars 11 and 11A, and the upper and lower ends are joined to the upper and lower horizontal bars 11 and 11A, respectively. For example, the horizontal length is 490 mm and the vertical width is 303 mm between the pair of left and right vertical bars 14 and 14 and the upper and lower horizontal bars 11 and 11A. A rectangular air passage opening 15 is formed.

  On the other hand, the lower end portion of the door A has the same structure (note that members similar to those of the upper end portion of the door A are described with the same reference numerals). That is, a pair of upper and lower horizontal rails 11A, 11 extending in the horizontal horizontal direction are disposed at a predetermined interval on the upper side of the lower horizontal frame 10 and closer to the lower end of the door A. , 11 are coupled to left and right vertical frames 9,9. Between the lower horizontal beam 11 and the lower horizontal frame 10, four short vertical beams 12, 12,... Extending in the vertical direction are arranged at positions corresponding to the vertical beams 12 above and below the door A. Are arranged in the left-right direction and both upper and lower ends are joined to the horizontal beam 11 and the lower horizontal frame 10, respectively, and the lower horizontal beam 11 and the lower horizontal frame 10 are arranged by these vertical beams 12, 12,. Is divided into five spaces (ranges), and the left and right ends of the spaces are filled with the core material 13.

  In addition, a pair of left and right vertical bars 14, 14 extending in the vertical direction are joined to the upper and lower horizontal bars 11A, 11 at the left and right ends between the upper and lower horizontal bars 11A, 11 below the door A, respectively. In addition, the side surfaces are arranged in contact with the vertical frames 9, 9, and the left and right lengths, for example, are 490 mm between the pair of left and right vertical bars 14, 14 and the upper and lower horizontal bars 11A, 11. A rectangular ventilation passage opening 15 having a vertical width of 303 mm is formed.

  Between the lower horizontal beam 11A at the upper part of the door A and the upper horizontal beam 11A at the lower part of the door A, there are four vertical beams at positions corresponding to the vertical beams 12, 12,. Are arranged with their upper and lower ends joined to the upper and lower horizontal bars 11A, 11A, respectively, and the vertical bars 16, 16,... Are elongated vertically between the upper and lower horizontal bars 11A, 11A. The space is divided into five spaces (ranges), and the left and right end spaces are filled with particle boards 17 and 17 that are vertically elongated, for example, with a thickness of 24 mm. Further, in the remaining three spaces in the middle of the door width direction (left and right direction), five short horizontal bars 18, 18,... Extending in the horizontal direction are adjacent to both ends at the same height position in the spaces. Are arranged in a state of being joined to the vertical rails 16, 16, and the respective horizontal rails 18, 18,... Are partitioned into six spaces arranged vertically. The six spaces for each of these spaces are divided into three types, large and small, and the two spaces at the top and bottom ends (six for the door A as a whole) are the same height as each other and the vertical width of the horizontal rail 11 is about the same. It is a horizontally long rectangular parallelepiped having a height (for example, 30 mm). Two spaces in the middle of the upper and lower sides (six in the door A as a whole) are of a vertically long rectangular parallelepiped having the same height (for example, 279.5 mm). The spaces between the upper and lower end spaces and the upper and lower middle spaces are of a vertically long rectangular parallelepiped having the same height (for example, 129.5 mm). A total of 12 places excluding the upper and lower end spaces are filled with a sound absorbing material 19 such as glass wool.

  As shown in FIG. 6, the surface plate 1 has horizontally long surface-side openings 21, 21 that extend in the horizontal direction at the upper and lower end portions. The upper surface side opening 21 has an upper end at the upper end of the upper vent passage opening 15 in the frame 8 (lower end of the horizontal rail 11) and left and right ends at the left and right ends of the upper vent passage opening 15. The lower ends are located in the upper region slightly lower than the upper end of the upper vent passage opening 15. On the other hand, the lower surface side opening 21 has a lower end at the lower end of the lower vent passage opening 15 (the upper end of the horizontal rail 11) in the frame 8 and a left and right end at the lower vent passage opening 15. Respectively, and the upper end is located in a lower region slightly raised from the lower end of the lower vent passage opening 15.

  On the other hand, as shown by broken lines in FIG. 6, the back plate 2 has horizontally long back side openings 22, 22 extending in the horizontal direction at the upper and lower end portions. The upper back surface side opening 22 has a lower end at a position lower than the upper and lower middle of the upper air passage opening 15 in the frame 8 (above the horizontal rail 11A), and left and right ends of the upper air passage opening. 15 and the upper end are located in the middle of the upper and lower vent passage openings 15 respectively. On the other hand, the lower rear surface side opening 22 is located at a position where the upper end is raised above the middle of the lower air passage opening 15 in the frame 8 (below the horizontal beam 11A), and the left and right ends are the lower side. Are aligned with the left and right ends of the vent passage opening 15, and the lower end is positioned in the middle of the upper and lower sides of the lower vent passage opening 15.

  As shown in FIG. 1, the front plate 1 is joined and integrated with the front surface of the frame 8, and the back plate 2 is joined and integrated with the back surface of the frame 8 so that the outer peripheral surfaces thereof coincide with each other. Thus, the upper and lower ventilation passage openings 15, 15 of the frame 8 are respectively closed by the front surface plate 1 and the rear surface plate 2, and in the space surrounded by these, the front surface side opening portion 21 and the back surface side opening portion 22 are formed. In the space between the upper and lower ventilation paths 24, 24 are formed near both the upper end and the lower end inside the door A.

  That is, as shown in FIG. 6, the door A is formed with air passages 24, 24 at the upper and lower portions thereof, and the outdoor space R <b> 1 and the indoor space R <b> 2 are passed through the air passages 24. It is designed to ventilate between.

  The upper air passage 24 has one end (front end) communicating with the surface side opening 21 that opens on the surface plate 1 on the surface of the door A, while the other end is on the surface side opening on the back plate 2 on the back surface of the door A. The back surface side opening 22 that opens to a position lower than 21 communicates with the two openings 21 and 22. On the other hand, the lower air passage 24 has one end (front end) communicating with the surface side opening 21 that opens to the surface plate 1 on the surface of the door A, while the other end opens on the surface side of the back plate 2 on the back surface of the door A. The back surface side opening 22 that opens to a position higher than the portion 21 communicates with the opening 21 and 22 so as to ventilate.

  The upper ventilation path 24 extends to the outside (lower side) of the rear surface side opening 22 inside the door A, and the sound absorbing space S is formed in the extended region. For example, the sound absorbing space S has a predetermined volume with respect to the ventilation passage opening 15 having a left and right length of 490 mm and a vertical width of 303 mm, and a horizontal length of 490 mm and a vertical width of 50 mm from the horizontal rail 11A. It is set to a rectangular parallelepiped shape, and is formed below the back surface side opening 22 of the air passage opening 15.

  The lower air passage 24 extends to the outside (upper side) of the back surface side opening 22 inside the door A, and the sound absorbing space S is configured in the extended region. For example, the sound absorbing space S has a predetermined volume extending from the horizontal rail 11A to the lower 50 mm with respect to the vent passage opening 15 having a left and right length of 490 mm and a vertical width of 303 mm. It is set in a rectangular parallelepiped shape, and is formed above the rear surface side opening 22 of the vent passage opening 15. That is, the upper and lower sound absorbing spaces S, S are provided continuously in the upper and lower ventilation paths 24, 24, respectively.

  It should be noted that one core member 26 is disposed and fixed between the front surface side opening 21 and the rear surface side opening 22 in each air passage opening 15 in the frame 8 so as not to block the air flow in the air passage 24. The core member 26 enhances the rigidity of the face plates 1 and 2 in the door thickness direction at the ventilation passage opening 15. A plurality of core members 26 may be provided.

  As shown in FIG. 1, a louver 31 is attached to each of the front surface side openings 21 of the front surface plate 1 and each of the back surface side openings 22 of the back surface plate 2, and each of the openings 21, 22 is closed to allow ventilation (note that the louver 31 is not shown in FIG. 6). Each gallery 31 has a rectangular frame-shaped louver frame 32 having a size corresponding to the openings 21 and 22 as shown in an enlarged manner in FIGS. The louver frame 32 includes a frame main body 33 that is closely fitted from the front end side to the openings 21 and 22 from the outside of the door A to a portion that is approximately the thickness of the face plate 1 and 2, and a door A of the frame main body 33. The outer peripheral portion on the base end side that is the outer side includes a flange portion 35 that protrudes along the outer surface of the face plates 1 and 2, and a rectangular opening 34 is formed inside the frame body 33.

  As shown in FIG. 2, a louver member 40 is integrally attached and fixed to the outer peripheral portion on the front end side located inside the door A of the frame body 33. The louver member 40 has a rectangular box shape made of, for example, metal, hard resin, or the like, and is fitted and fixed to the outer peripheral portion on the front end side of the frame main body 33. In the bottom portion of the louver member 40, a plurality of horizontally long vent holes 41, 41,... Are opened at a portion corresponding to the opening 34 of the frame body 33. The vent holes 41, 41,. A plurality of (two in the illustrated example) louvers 42 and 42 (blades) are provided at the boundary portion. The louvers 42 and 42 are parallel to each other, and in the gallery 31 of the lower surface side opening 21 and the upper rear surface opening 22 of the door A, the center side in the door thickness direction (inside the door A). In the gallery 31 of the upper surface side opening 21 and the lower rear surface opening 22 of the door A, the door A is directed downward toward the center side in the door thickness direction. In this way, the inclination angle θ1 with respect to the upper and lower surfaces is, for example, θ1 = 20 ° to 60 ° (40 ° ± 20 °).

  Each louver 42 can be provided, for example, by forming a substantially U-shaped slit at the bottom of the louver member 40 and cutting the portion in the slit obliquely with a line connecting the slit ends as a fulcrum. The portion including the inside of the slit becomes the vent 41.

  In the opening 34 of the frame body 33, an inclined surface 37 is formed at the peripheral edge on the front end side (the right end side in FIG. 2) located inside the door A by cutting away the corner of the peripheral edge obliquely. The opening area between the upper and lower end portions and the center side end portion in the door thickness direction of the louver 42 (the right end portion in FIG. 2) is formed by the inclined surface 37 of the opening rim. It is designed to prevent it from becoming smaller with the inclination.

  The inclination angle θ2 of the inclined surface 37 is the same over the entire periphery of the opening 34, and the inclination angle θ2 with respect to the upper and lower surfaces of the upper and lower ends is substantially the same as the inclination angle θ1 of the louver 42, for example.

  Therefore, in this embodiment, the upper and lower ventilation passage openings 15 and 15 in the frame 8 of the door A are covered with the front and back face plates 1 and 2, respectively. 15, the opening portions 21 and 22 on the front surface side and the back surface side that communicate with the opening 15 are opened at different height positions, so that the front surface side opening portion 21 and the back surface side opening portion 22 of the door A Two ventilation passages 24, 24 communicating with each other are formed. Therefore, the air in the outdoor space R1 on the front side of the door A flows into the indoor space R2 on the back side of the door A through the front surface side opening 21, the ventilation path 24, and the back surface side opening 22, or flows in the opposite direction. Thus, ventilation can be secured between the spaces R1 and R2 on both sides of the door A. For example, when the outdoor space R1 is a hallway and the indoor space R2 is a toilet, the air in the hallway is sucked by the operation of a ventilation fan (not shown) in the toilet, etc. The air flows through the ventilation paths 24, 24 above and below the door A into the toilet, and the toilet is ventilated.

  In addition, a rectangular parallelepiped-shaped sound absorbing space S having a predetermined volume is provided in the upper and lower positions inside the door A so as to extend the air passages 24, that is, continuously to the air passages 24. Therefore, when the sound on the back side of the door A (or the sound on the front side) is transmitted to the front side of the door A (or the back side of the door A) via the air passage 24, the sound in the specific frequency range is generated in the sound absorbing space S. It is absorbed and attenuated while interfering. Thereby, the propagation of sound between both sides of the door A can be suppressed, and the soundproof door A is obtained. In addition, it is possible to increase the air flow while maintaining the sound insulation and soundproofing effects in the upper and lower sound absorbing spaces S, S.

  In this way, the sound absorption space S suppresses the propagation of sound on both sides of the door A, so that a large hollow ventilation space is provided inside the door A to eliminate the need for a cavity, and has a normal volume ventilation path. In the door A, it is only necessary to provide the sound absorbing space portion S, and no major improvement is required. In addition, by providing a large ventilation space inside the door A, dirty or moist air does not pass through the inside of the door A, so that the inside of the door A does not deteriorate. Furthermore, there is no weight reduction of the door A due to the hollowing out of the door A, and the sound insulation performance of the door A itself can be maintained. Thus, the door A can be sound-proofed while preventing deterioration inside the door A and maintaining the sound insulation performance of the door A itself.

  Then, by changing the volume of the sound absorption space S, it is possible to correspond to a desired sound absorption region.

  Further, in the louver frame 32 attached to the upper and lower surface side opening portions 21 and the back surface side opening portion 22 of the door A, the door 34 is inclined to the upper and lower ends of the door thickness direction center side (inside the door A). Since the surface 37 is formed, a larger opening area is secured between the central edge of the door 34 in the thickness direction of the opening 34 and the inclined louver 42 at the periphery of the opening 34 of the louver frame 32 than the case without the inclined surface 37. Then, the air flows smoothly without incurring ventilation loss due to the generation of vortices, and the air can be efficiently ventilated through the gallery 31.

  Next, specific examples will be described.

(Sound insulation performance)
The sound insulation performance of the ventilation soundproof door having the configuration of the above embodiment was compared with that of a general door. The sound source was pink noise, and the sound insulation performance (unit: dB) of 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, and 4 kHz was evaluated. The result is shown in FIG.

  Referring to FIG. 7, the soundproofing door according to the embodiment has improved sound insulation performance in a wide frequency range of 250 Hz to 4 kHz as compared with a general door.

(Evaluation by N value)
When the indoor space is a toilet and the outdoor space is a corridor, a washing sound is generated in the toilet, and the sound pressure between the actual cleaning sound recorded in the toilet and the cleaning sound recorded in the corridor The levels were compared and evaluated by N value. The result is shown in FIG. The door was compared with a ventilated soundproof type of the configuration of the above embodiment and a general door.

  Similarly, when the indoor space is a toilet and the outdoor space is a corridor, a male action sound (piss sound) is generated in the toilet, and the actual action sound recorded in the toilet is The sound pressure level was compared with the action sound recorded in the corridor, and the N value was evaluated. The result is shown in FIG. The door was compared with a ventilated soundproof type of the configuration of the above embodiment and a general door.

  8 and 9, the N value of the general door is N-45 (“sounds a little louder”) in both the washing sound and the action sound. On the other hand, the N value of the ventilated soundproof door according to the embodiment of the present invention is N-35 ("sounds smaller"), which is 10 lower than the general door, resulting in a difference of two grades. It can be seen that the soundproofing performance is effective.

(Other embodiments)
10 and 11 show a ventilation soundproof door A according to another embodiment.

  In this embodiment, a sound absorbing material 25 made of glass wool, rock wool or the like is accommodated in the upper and lower sound absorbing spaces S. The rest of the configuration is the same as that of the above-described embodiment, and therefore, the same reference numerals are given to the same components and the detailed description is omitted.

  In this embodiment, the sound-absorbing material 25 accommodated in the sound-absorbing space portion S can further enhance the sound insulation and sound-proofing effects, and the frequency band for sound absorption can be adjusted by the volume of the sound-absorbing space portion S.

  In each of the above embodiments, the air passages 24, 24 are formed at two locations above and below the door A. However, it is not always necessary to provide both at the top and bottom, and even if only one location is provided. Good. However, in the case of one place, the size of the openings 21 and 22 and the louver 31 is increased in order to secure the air flow. Therefore, in order to improve the design, a plurality of air passages 24 are provided as in the above embodiments. It is preferable to provide a small gallery 31.

  Further, in each of the above embodiments, the louver 31 has the louvers 42, 42 extending in the horizontal and horizontal directions, but the present invention is also applicable to a ventilation soundproof door provided with a louver having a vertical louver. can do.

  The present invention is extremely useful and industrial because it can suppress the propagation of sound between both sides of the door while ensuring the ventilation of the space on both sides of the door and preventing the deterioration inside the door and maintaining the sound insulation performance of the door itself. High availability on.

21 Front side opening 22 Back side opening 24 Air passage 25 Sound absorbing material A Door S Sound absorbing space

  The present invention relates to a ventilated soundproof door used for a building such as a house, and more particularly relates to a door with improved sound insulation without impairing breathability.

  In recent years, in order to deal with the problem of sick houses caused by formaldehyde contained in paints and adhesives used for interior finishing of houses, in accordance with the revision of the Building Standard Law, a certain degree of air permeability is maintained even when the door is closed. It is required to ensure.

And when it ventilates continuously throughout the day, that is, for 24 hours continuously, it corresponds by providing an opening (loud or undercut) with an effective opening area of 100 to 150 cm ^{2 on} the door as a ventilation path in the door. be able to.

  However, there has been a problem that noise from the outside and sound generated in the room leaks out from the opening, and in particular, there is a problem that the sound generated in the toilet leaks into the adjacent corridor or room.

  Conventionally, for example, those shown in Patent Documents 1 to 3 have been proposed as a ventilation soundproof door for satisfying both such ventilation and soundproofing.

  Although these proposals differ in detail structure, basically the opening portions provided at the top and bottom of the door open toward the indoor space and the outdoor space located on both sides of the door, respectively, and the opening portion is the door. This is a structure in which air moves between the interior and the exterior through a vent passage formed in the interior and communicating with the top and bottom.

JP-A-9-235960 JP 2005-105579 A JP 2007-113307 A

  However, as in these proposed examples, if a ventilating path for soundproofing located in the upper and lower positions inside the door is provided, the venting path becomes a long and large space (venting space) over almost the entire door. As a result, dirty air or air that contains a lot of moisture will pass through the ventilation space for a long time, and the ventilation space is more likely to get dirty or moist, which causes the door to deteriorate from the inside. It becomes easy.

  In addition, a cavity as a ventilation space is formed almost entirely inside the door, which not only reduces the strength of the door, but also increases the sound insulation as the door surface density increases (heavy). It is unavoidable that the soundproofing property of the device itself deteriorates.

  The present invention has been made in view of such various points, and an object of the present invention is to devise the structure of the door to solve these problems and to obtain a ventilation and soundproof door satisfying both ventilation and soundproofing. There is in doing so.

  In order to achieve the above object, the present invention is characterized in that the ratio of the air passage formed inside the door to the entire door is reduced and a sound absorbing structure communicating with the air passage is employed. .

Specifically, in the first invention, one end communicates with a surface side opening that opens on the door surface, while the other end opens on the inner side in the vertical direction with respect to the surface side opening on the back surface of the door. An air passage that communicates with the opening and vents between both openings is formed at least near the upper end and near the lower end inside the door, and the air passage is located inside the door on the inner side in the vertical direction than the opening on the back side. The sound absorption space part is comprised by extension and the said extension area | region, It is characterized by the above-mentioned.

  In the present invention, an air passage is formed inside the door, and this air passage communicates with the front surface side opening and the back surface side opening of the door. It flows to the space on the back side of the door through the road and the back side opening, or flows in the opposite direction. This makes it possible to ensure ventilation between the spaces on both sides of the door.

  In addition, since the sound absorbing space portion including the extending portion of the ventilation path is provided in the door, the sound on the back side of the door (or the sound on the front side) is transmitted to the front side of the door (or the back side of the door) via the ventilation path. At this time, the sound absorption is attenuated while interfering in the sound absorption space, and thus the sound propagation between both sides of the door can be suppressed.

  Then, by changing the volume of the sound absorbing space, it is possible to correspond to a desired sound absorbing region (low sound or high sound).

  Therefore, unlike the conventional case, there is no need for a large hollow ventilation space inside the door, and due to the large ventilation space, dirty or moist air does not pass through the ventilation space inside the door. Therefore, the inside of the door is not deteriorated, the weight of the door is not reduced by hollowing out the inside of the door, and the sound insulation performance of the door itself can be maintained. Therefore, it is possible to achieve sound insulation of the door while preventing deterioration inside the door and maintaining the sound insulation performance of the door itself.

  According to a second aspect, in the first aspect, the air passage is formed near both the upper end and the lower end inside the door, and the sound absorbing space is provided continuously in each air passage. It is characterized by.

  According to the present invention, it is possible to achieve a sound insulation and soundproofing effect while securing the air flow rate near both the upper end and the lower end of the door, and each effect is doubled compared to the first invention.

  According to a third invention, in the first or second invention, a sound absorbing material is accommodated in the sound absorbing space.

  In this invention, the sound insulation and soundproofing effects can be further enhanced by the combined use of the sound absorbing material accommodated in the sound absorbing space. Further, the frequency band for absorbing sound can be adjusted by the volume of the sound absorbing space.

  As described above, according to the first aspect of the present invention, an air passage communicating with the door surface side opening and the door rear surface side opening is provided inside the door, and the extending region of the air passage is used as the sound absorbing space. Thus, it is possible to ensure ventilation between the spaces on both sides of the door and prevent deterioration due to a large ventilation space inside the door. In addition, since the door does not become lighter than necessary (since the cavity inside the door does not become large), the sound absorbing space part absorbs and suppresses the sound transmission between both sides of the door while maintaining the sound insulation performance of the door itself. can do.

  According to the second aspect of the invention, by forming the air passage having the sound absorbing space portion near both the upper end and the lower end inside the door, it is possible to increase the air flow while maintaining the sound insulation and sound insulation effects.

  According to the third invention, by accommodating the sound absorbing material in the sound absorbing space portion, the sound insulation and soundproofing effects can be further enhanced, and the frequency band for absorbing sound can be adjusted by the volume of the sound absorbing space portion.

It is an expanded sectional view showing an important section of a ventilation soundproof door concerning one embodiment. It is an expanded sectional view of a louver. It is a front view which shows the back side of a louver frame. It is a front view which shows the front side of a louver frame. It is a front view of the flame | frame inside the door in one Embodiment. It is a front view of the ventilation soundproof door concerning one embodiment. It is a figure which shows the sound insulation performance of a ventilation soundproof door when a sound source is made into pink noise. It is a figure which shows the soundproofing performance of the ventilation soundproofing door when the sound source is the sound of washing in the toilet. It is a figure which shows the soundproof performance of the ventilation soundproof door when the sound source is the action sound of the man in the toilet. It is the FIG. 1 equivalent view of the ventilation soundproof door which concerns on other embodiment. It is the FIG. 5 equivalent view of the flame | frame inside the door in other embodiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The following description of the embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its use at all.

  FIG. 6 shows the overall configuration of the ventilation soundproof door A according to the embodiment of the present invention, as viewed from the front side. The door A has a vertically long rectangular shape, and as shown in an enlarged view in FIG. 1, a front plate 1 facing the outdoor space R1 (for example, a corridor) and a back surface facing the indoor space R2 (for example, a toilet). A face plate 2 is provided. The double-sided plates 1 and 2 have the same shape and are integrally attached to the front and back of the frame 8 as shown in FIG. In addition, although the door A has mentioned as an example what partitions off a toilet and the space (corridor) of the outer side, it cannot be overemphasized that it may be another indoor or outdoor door.

  As shown in FIG. 6 again, a knob attaching portion 4 for attaching a door knob (not shown) and a box lock (not shown) are attached to the left side of the door A in the center of the figure in the height direction. For this purpose, a lock mounting portion 5 is formed side by side. This door A is a type of door that swings around the attached side as a rotation center with the side on the right side in FIG. 6, which is the opposite side of the knob attaching portion 4, attached to a door frame (not shown).

  The frame 8 of the door A will be described with reference to FIG. 5. The frame 8 has the same shape as each of the face plates 1 and 2, and a pair of left and right vertical frames 9 that extend in the vertical direction and form left and right sides (long sides). , 9 and a pair of upper and lower horizontal frames 10, 10 extending in the horizontal direction and forming upper and lower sides (short sides) are coupled and fixed in a vertically long rectangular frame shape.

  On the lower side of the upper horizontal frame 10 and near the upper end of the door A, a pair of upper and lower horizontal rails 11 and 11A extending in the horizontal horizontal direction are arranged with a predetermined interval. The left and right end portions of the left and right are coupled to the left and right vertical frames 9,9. Between the upper horizontal frame 11 and the upper horizontal frame 10, four short vertical beams 12, 12,... Extending in the vertical direction are arranged in the horizontal direction, and the upper and lower ends are respectively arranged in the horizontal beam 11 and the upper horizontal frame 10. These vertical bars 12, 12,... Are partitioned into five spaces (ranges) between the upper horizontal rail 11 and the upper horizontal frame 10, and the spaces at the left and right ends thereof are cored. Materials 13 and 13 are filled.

  A pair of left and right vertical bars 14 and 14 extending in the vertical direction are joined to the left and right ends between the upper and lower horizontal bars 11 and 11A, and the upper and lower ends are joined to the upper and lower horizontal bars 11 and 11A, respectively. For example, the horizontal length is 490 mm and the vertical width is 303 mm between the pair of left and right vertical bars 14 and 14 and the upper and lower horizontal bars 11 and 11A. A rectangular air passage opening 15 is formed.

  On the other hand, the lower end portion of the door A has the same structure (note that members similar to those of the upper end portion of the door A are described with the same reference numerals). That is, a pair of upper and lower horizontal rails 11A, 11 extending in the horizontal horizontal direction are disposed at a predetermined interval on the upper side of the lower horizontal frame 10 and closer to the lower end of the door A. , 11 are coupled to left and right vertical frames 9,9. Between the lower horizontal beam 11 and the lower horizontal frame 10, four short vertical beams 12, 12,... Extending in the vertical direction are arranged at positions corresponding to the vertical beams 12 above and below the door A. Are arranged in the left-right direction and both upper and lower ends are joined to the horizontal beam 11 and the lower horizontal frame 10, respectively, and the lower horizontal beam 11 and the lower horizontal frame 10 are arranged by these vertical beams 12, 12,. Is divided into five spaces (ranges), and the left and right ends of the spaces are filled with the core material 13.

  In addition, a pair of left and right vertical bars 14, 14 extending in the vertical direction are joined to the upper and lower horizontal bars 11A, 11 at the left and right ends between the upper and lower horizontal bars 11A, 11 below the door A, respectively. In addition, the side surfaces are arranged in contact with the vertical frames 9, 9, and the left and right lengths, for example, are 490 mm between the pair of left and right vertical bars 14, 14 and the upper and lower horizontal bars 11A, 11. A rectangular ventilation passage opening 15 having a vertical width of 303 mm is formed.

Between the lower horizontal beam 11A at the upper part of the door A and the upper horizontal beam 11A at the lower part of the door A, there are four vertical beams at positions corresponding to the vertical beams 12, 12,. Are arranged with their upper and lower ends joined to the upper and lower horizontal bars 11A, 11A, respectively, and the vertical bars 16, 16,... Are elongated vertically between the upper and lower horizontal bars 11A, 11A. The space is divided into five spaces (ranges), and the left and right end spaces are filled with particle boards 17 and 17 that are vertically elongated, for example, with a thickness of 24 mm. Further, in the remaining three spaces in the middle of the door width direction (left and right direction), five short horizontal bars 18, 18,... Extending in the horizontal direction are adjacent to both ends at the same height position in the spaces. Are arranged in a state of being joined to the vertical rails 16, 16, and the respective horizontal rails 18, 18,... Are partitioned into six spaces arranged vertically. The six spaces for each of these spaces are divided into three types, large and small, and the two spaces at the top and bottom ends (six for the door A as a whole) are the same height as each other and the vertical width of the horizontal rail 11 is about the same. It is a horizontally long rectangular parallelepiped having a height (for example, 30 mm). Two spaces in the middle of the upper and lower sides (six in the door A as a whole) are of a vertically long rectangular parallelepiped having the same height (for example, 279.5 mm). The spaces between the upper and lower end spaces and the upper and lower middle spaces are of a vertically long rectangular parallelepiped having the same height (for example, 129.5 mm). Then, the space of the total of 12 points excluding the space of upper and lower end sound absorbing material 19 such as glass wool is filled.

  As shown in FIG. 6, the surface plate 1 has horizontally long surface-side openings 21, 21 that extend in the horizontal direction at the upper and lower end portions. The upper surface side opening 21 has an upper end at the upper end of the upper vent passage opening 15 in the frame 8 (lower end of the horizontal rail 11) and left and right ends at the left and right ends of the upper vent passage opening 15. The lower ends are located in the upper region slightly lower than the upper end of the upper vent passage opening 15. On the other hand, the lower surface side opening 21 has a lower end at the lower end of the lower vent passage opening 15 (the upper end of the horizontal rail 11) in the frame 8 and a left and right end at the lower vent passage opening 15. Respectively, and the upper end is located in a lower region slightly raised from the lower end of the lower vent passage opening 15.

On the other hand, as shown by broken lines in FIG. 6, the back plate 2 has a horizontally long back side opening that extends in the horizontal direction at the upper and lower end portions and in the vertical direction inner side portion than the front side opening portion 21. The parts 22 and 22 are opened. The upper back surface side opening 22 has a lower end at a position lower than the upper and lower middle of the upper air passage opening 15 in the frame 8 (above the horizontal rail 11A), and left and right ends of the upper air passage opening. 15 and the upper end are located in the middle of the upper and lower vent passage openings 15 respectively. On the other hand, the lower rear surface side opening 22 is located at a position where the upper end is raised above the middle of the lower air passage opening 15 in the frame 8 (below the horizontal beam 11A), and the left and right ends are the lower side. Are aligned with the left and right ends of the vent passage opening 15, and the lower end is located in the upper and lower middle of the lower vent passage opening 15.

  As shown in FIG. 1, the front plate 1 is joined and integrated with the front surface of the frame 8, and the back plate 2 is joined and integrated with the back surface of the frame 8 so that the outer peripheral surfaces thereof coincide with each other. Thus, the upper and lower ventilation passage openings 15, 15 of the frame 8 are respectively closed by the front surface plate 1 and the rear surface plate 2, and in the space surrounded by these, the front surface side opening portion 21 and the back surface side opening portion 22 are formed. In the space between the upper and lower ventilation paths 24, 24 are formed near both the upper end and the lower end inside the door A.

  That is, as shown in FIG. 6, the door A is formed with air passages 24, 24 at the upper and lower portions thereof, and the outdoor space R <b> 1 and the indoor space R <b> 2 are passed through the air passages 24. It is designed to ventilate between.

The upper air passage 24 has one end (front end) communicating with the surface side opening 21 that opens on the surface plate 1 on the surface of the door A, while the other end is on the surface side opening on the back plate 2 on the back surface of the door A. 21 communicates with the rear surface side opening 22 that opens at a position lower than 21 (the inner portion in the vertical direction), and allows ventilation between the openings 21 and 22. On the other hand, the lower air passage 24 has one end (front end) communicating with the surface side opening 21 that opens to the surface plate 1 on the surface of the door A, while the other end opens on the surface side of the back plate 2 on the back surface of the door A. It communicates with the rear surface side opening 22 that opens to a position higher than the portion 21 (upward and downward inner portion), and allows ventilation between the openings 21 and 22.

The upper air passage 24 extends inside the door A outside the lower surface side opening 22 (lower side) , that is, inside the upper surface in the vertical direction with respect to the rear surface opening 22 , and the sound absorbing space portion S is configured in the extending region. Yes. The sound absorbing space S has, for example, a left and right length extending from the rear surface side opening 22 of the air passage opening 15 to the lower horizontal rail 11A with respect to the air passage opening 15 having a left and right length of 490 mm and a vertical width of 303 mm. There has been made form a rectangular shape having a Jo Tokoro volume with 490 mm.

The lower air passage 24 extends to the outside (upper side) of the back surface side opening 22 inside the door A, that is, to the inside of the back surface side opening 22 in the vertical direction , and the sound absorbing space S is configured in the extending region. Yes. For example, the sound absorbing space S has a horizontal length of 490 mm and an air passage opening 15 having a vertical width of 303 mm extending from the back surface side opening 22 of the air passage opening 15 to the upper horizontal rail 11A. There has been made form a rectangular shape having a Jo Tokoro volume with 490 mm. That is, the upper and lower sound absorbing spaces S, S are provided continuously in the upper and lower ventilation paths 24, 24, respectively.

  It should be noted that one core member 26 is disposed and fixed between the front surface side opening 21 and the rear surface side opening 22 in each air passage opening 15 in the frame 8 so as not to block the air flow in the air passage 24. The core member 26 enhances the rigidity of the face plates 1 and 2 in the door thickness direction at the ventilation passage opening 15. A plurality of core members 26 may be provided.

  As shown in FIG. 1, a louver 31 is attached to each of the front surface side openings 21 of the front surface plate 1 and each of the back surface side openings 22 of the back surface plate 2, and each of the openings 21, 22 is closed to allow ventilation (note that the louver 31 is not shown in FIG. 6). Each gallery 31 has a rectangular frame-shaped louver frame 32 having a size corresponding to the openings 21 and 22 as shown in an enlarged manner in FIGS. The louver frame 32 includes a frame main body 33 that is closely fitted from the front end side to the openings 21 and 22 from the outside of the door A to a portion that is approximately the thickness of the face plate 1 and 2, and the door A of the frame main body 33. The outer peripheral portion on the base end side that is the outer side includes a flange portion 35 that protrudes along the outer surface of the face plates 1 and 2, and a rectangular opening 34 is formed inside the frame body 33.

  As shown in FIG. 2, a louver member 40 is integrally attached and fixed to the outer peripheral portion on the front end side located inside the door A of the frame body 33. The louver member 40 has a rectangular box shape made of, for example, metal, hard resin, or the like, and is fitted and fixed to the outer peripheral portion on the front end side of the frame main body 33. In the bottom portion of the louver member 40, a plurality of horizontally long vent holes 41, 41,... Are opened at a portion corresponding to the opening 34 of the frame body 33. The vent holes 41, 41,. A plurality of (two in the illustrated example) louvers 42 and 42 (blades) are provided at the boundary portion. The louvers 42 and 42 are parallel to each other, and in the gallery 31 of the lower surface side opening 21 and the upper rear surface opening 22 of the door A, the center side in the door thickness direction (inside the door A). In the gallery 31 of the upper surface side opening 21 and the lower rear surface opening 22 of the door A, the door A is directed downward toward the center side in the door thickness direction. In this way, the inclination angle θ1 with respect to the upper and lower surfaces is, for example, θ1 = 20 ° to 60 ° (40 ° ± 20 °).

  Each louver 42 can be provided, for example, by forming a substantially U-shaped slit at the bottom of the louver member 40 and cutting the portion in the slit obliquely with a line connecting the slit ends as a fulcrum. The portion including the inside of the slit becomes the vent 41.

  In the opening 34 of the frame body 33, an inclined surface 37 is formed at the peripheral edge on the front end side (the right end side in FIG. 2) located inside the door A by cutting away the corner of the peripheral edge obliquely. The opening area between the upper and lower end portions and the center side end portion in the door thickness direction of the louver 42 (the right end portion in FIG. 2) is formed by the inclined surface 37 of the opening rim. It is designed to prevent it from becoming smaller with the inclination.

  The inclination angle θ2 of the inclined surface 37 is the same over the entire periphery of the opening 34, and the inclination angle θ2 with respect to the upper and lower surfaces of the upper and lower ends is substantially the same as the inclination angle θ1 of the louver 42, for example.

  Therefore, in this embodiment, the upper and lower ventilation passage openings 15 and 15 in the frame 8 of the door A are covered with the front and back face plates 1 and 2, respectively. 15, the opening portions 21 and 22 on the front surface side and the back surface side that communicate with the opening 15 are opened at different height positions, so that the front surface side opening portion 21 and the back surface side opening portion 22 of the door A Two ventilation passages 24, 24 communicating with each other are formed. Therefore, the air in the outdoor space R1 on the front side of the door A flows into the indoor space R2 on the back side of the door A through the front surface side opening 21, the ventilation path 24, and the back surface side opening 22, or flows in the opposite direction. Thus, ventilation can be secured between the spaces R1 and R2 on both sides of the door A. For example, when the outdoor space R1 is a hallway and the indoor space R2 is a toilet, the air in the hallway is sucked by the operation of a ventilation fan (not shown) in the toilet, etc. The air flows through the ventilation paths 24, 24 above and below the door A into the toilet, and the toilet is ventilated.

  In addition, a rectangular parallelepiped-shaped sound absorbing space S having a predetermined volume is provided in the upper and lower positions inside the door A so as to extend the air passages 24, that is, continuously to the air passages 24. Therefore, when the sound on the back side of the door A (or the sound on the front side) is transmitted to the front side of the door A (or the back side of the door A) via the air passage 24, the sound in the specific frequency range is generated in the sound absorbing space S. It is absorbed and attenuated while interfering. Thereby, the propagation of sound between both sides of the door A can be suppressed, and the soundproof door A is obtained. In addition, it is possible to increase the air flow while maintaining the sound insulation and soundproofing effects in the upper and lower sound absorbing spaces S, S.

  In this way, the sound absorption space S suppresses the propagation of sound on both sides of the door A, so that a large hollow ventilation space is provided inside the door A to eliminate the need for a cavity, and has a normal volume ventilation path. In the door A, it is only necessary to provide the sound absorbing space portion S, and no major improvement is required. In addition, by providing a large ventilation space inside the door A, dirty or moist air does not pass through the inside of the door A, so that the inside of the door A does not deteriorate. Furthermore, there is no weight reduction of the door A due to the hollowing out of the door A, and the sound insulation performance of the door A itself can be maintained. Thus, the door A can be sound-proofed while preventing deterioration inside the door A and maintaining the sound insulation performance of the door A itself.

  Then, by changing the volume of the sound absorption space S, it is possible to correspond to a desired sound absorption region.

  Further, in the louver frame 32 attached to the upper and lower surface side opening portions 21 and the back surface side opening portion 22 of the door A, the door 34 is inclined to the upper and lower ends of the door thickness direction center side (inside the door A). Since the surface 37 is formed, a larger opening area is secured between the central edge of the door 34 in the thickness direction of the opening 34 and the inclined louver 42 at the periphery of the opening 34 of the louver frame 32 than the case without the inclined surface 37. Then, the air flows smoothly without incurring ventilation loss due to the generation of vortices, and the air can be efficiently ventilated through the gallery 31.

  Next, specific examples will be described.

(Sound insulation performance)
The sound insulation performance of the ventilation soundproof door having the configuration of the above embodiment was compared with that of a general door. The sound source was pink noise, and the sound insulation performance (unit: dB) of 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, and 4 kHz was evaluated. The result is shown in FIG.

  Referring to FIG. 7, the soundproofing door according to the embodiment has improved sound insulation performance in a wide frequency range of 250 Hz to 4 kHz as compared with a general door.

(Evaluation by N value)
When the indoor space is a toilet and the outdoor space is a corridor, a washing sound is generated in the toilet, and the sound pressure between the actual cleaning sound recorded in the toilet and the cleaning sound recorded in the corridor The levels were compared and evaluated by N value. The result is shown in FIG. The door was compared with a ventilated soundproof type of the configuration of the above embodiment and a general door.

  Similarly, when the indoor space is a toilet and the outdoor space is a corridor, a male action sound (piss sound) is generated in the toilet, and the actual action sound recorded in the toilet is The sound pressure level was compared with the action sound recorded in the corridor, and the N value was evaluated. The result is shown in FIG. The door was compared with a ventilated soundproof type of the configuration of the above embodiment and a general door.

  8 and 9, the N value of the general door is N-45 (“sounds a little louder”) in both the washing sound and the action sound. On the other hand, the N value of the ventilated soundproof door according to the embodiment of the present invention is N-35 ("sounds smaller"), which is 10 lower than the general door, resulting in a difference of two grades. It can be seen that the soundproofing performance is effective.

(Other embodiments)
10 and 11 show a ventilation soundproof door A according to another embodiment.

  In this embodiment, a sound absorbing material 25 made of glass wool, rock wool or the like is accommodated in the upper and lower sound absorbing spaces S. The rest of the configuration is the same as that of the above-described embodiment, and therefore, the same reference numerals are given to the same components and the detailed description is omitted.

  In this embodiment, the sound-absorbing material 25 accommodated in the sound-absorbing space portion S can further enhance the sound insulation and sound-proofing effects, and the frequency band for sound absorption can be adjusted by the volume of the sound-absorbing space portion S.

  In each of the above embodiments, the air passages 24, 24 are formed at two locations above and below the door A. However, it is not always necessary to provide both at the top and bottom, and even if only one location is provided. Good. However, in the case of one place, the size of the openings 21 and 22 and the louver 31 is increased in order to secure the air flow. Therefore, in order to improve the design, a plurality of air passages 24 are provided as in the above embodiments. It is preferable to provide a small gallery 31.

  Further, in each of the above embodiments, the louver 31 has the louvers 42, 42 extending in the horizontal and horizontal directions, but the present invention is also applicable to a ventilation soundproof door provided with a louver having a vertical louver. can do.

  The present invention is extremely useful and industrial because it can suppress the propagation of sound between both sides of the door while ensuring the ventilation of the space on both sides of the door and preventing the deterioration inside the door and maintaining the sound insulation performance of the door itself. High availability on.

21 Front side opening 22 Back side opening 24 Air passage 25 Sound absorbing material A Door S Sound absorbing space

Claims (3)

One end communicates with the front side opening that opens on the door surface, while the other end communicates with the back side opening that opens on the back of the door and vents between the two openings. Formed on at least one side,
The ventilation soundproof door, wherein the ventilation path extends outside the opening on the back surface side inside the door, and a sound absorbing space is formed in the extension region. The ventilation soundproof door according to claim 1,
The ventilation path is formed on both the upper end side and the lower end side inside the door,
The sound-absorbing and sound-insulating door is characterized in that the sound absorbing space is provided continuously in each air passage. The ventilation soundproof door according to claim 1 or 2,
A soundproof door having a sound absorbing material accommodated in the sound absorbing space.

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