JP2009243078A - Sound insulation door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulation door having high performance of either of sound insulating properties and ventilation properties. <P>SOLUTION: In this sound insulation door 1, a plurality of tires of sound absorption space forming materials 24 formed in a V-shape are arranged in a central indoor space 23 in such a manner that both ends of them abut on opposed side surfaces of vertical partition materials 6a and 6b, respectively. A through-hole 28 is formed in the hanging side vertical partition material 6a so that each split space 25 can communicate with a hanging side indoor space 21, and a through-hole 27 is formed in the handle side vertical partition material 6b so that each split space 25 can communicate with a handle side indoor space 22. A hanging side slit 12 is formed along a longitudinal direction in a face material 9a, so that the hanging side indoor space 21 can communicate with the outside. A handle side slit 13 is formed along a longitudinal direction in a face material 9b, so that the handle side indoor space 22 can communicate with the outside. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sound insulation door applied to a place where both ventilation performance and sound insulation performance are required, such as a living room or a toilet in a house.

  Residential rooms and toilets are required to have predetermined ventilation performance for health or hygiene reasons, but on the other hand, it is necessary to give consideration to sound leakage and privacy in the surrounding area. Many proposals have been made to satisfy the contradictory functions of sound and sound insulation.

  Among these, for example, those known for purposes other than housing include, for example, an opening provided on one surface and an opening provided on the other surface or the frame peripheral surface in a maze-like or bent hollow ventilation. There is a ventilation sound insulation device (Patent Documents 1 and 2) in which a sound absorbing material is arranged on the inner surface of the hollow ventilation passage while communicating with each other through the passage.

  Further, as a residential use, for example, an opening provided on one surface and an opening provided on the other surface or the frame peripheral surface are communicated by a hollow ventilation passage, and a sound absorbing material is provided on the inner surface of the hollow ventilation passage. Arranged ones (Patent Documents 3 and 5) and those obtained by partitioning a hollow ventilation passage with a crosspiece (Patent Document 4) are known.

  Moreover, what improved the air permeability between the inside and outside of a door using the clearance gap below a door bottom face is known (patent documents 5-patent documents 7).

  However, most of the above-mentioned proposals have not been confirmed by the verification test, and it is not always clear whether the effects as described in each document are achieved.

Shokai 62-73092 JP 5-302369 JP-A-9-235960 JP 2001-227257 A JP 2000-45651 A JP 2001-132353 A JP2001-132354A JP-A-2005-207107 JP 2006-57385 A JP 2006-57386 A JP2001-012158 JP-A-2005-105579

  Under such circumstances, the present applicant has obtained a rectangular frame in which a plurality of cross members parallel to the short direction of the rectangular frame are arranged in the plane of the rectangular frame, and the front of the rectangular frame. And a pair of face plates that are airtightly joined to the back surface, respectively, and a door interior space surrounded by the rectangular frame body and the face plate is divided into a plurality of divided spaces by the cross members. A predetermined through hole is formed in each of the horizontal members so that adjacent divided spaces communicate with each other through the horizontal members of the plurality of divided spaces, and of the rectangular frame body, An upper through-hole is formed in the upper frame material positioned at the upper position in the built-up posture, and the uppermost divided space of the divided spaces communicates with the outside, and the built-in posture of the rectangular frame body A lower through-hole is formed in the lower frame material located at the lower part of the divided space. The lowermost divided space communicates with the outside, and 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 A sound insulation door was developed in which the angle was changed along the short direction of the rectangular frame (Patent Document 12).

According to the invention by the present applicant, as a result of measuring the sound pressure level difference by the measurement method defined in JIS A 1417: 2000, D-25 is cleared as a sound insulation grade which is an index of the soundproof performance of the door, It was also found that the ventilation performance of about 20 m ³ / h required for toilet ventilation can be secured.

  However, even with the applicant's proposal, the ventilation performance is not sufficient, and the development of a sound insulation door having high performance in both sound insulation and ventilation is currently awaited.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a sound insulating door having high performance in both sound insulating properties and ventilation properties.

  In order to achieve the above object, the sound insulation door according to the present invention has two vertical partition members along the longitudinal direction of the rectangular frame body in the construction surface of the rectangular frame body as described in claim 1. A rectangular frame arranged substantially in parallel, and a pair of face materials air-tightly joined to the front and back surfaces of the rectangular frame, and of the two vertical partition members, The space in the door between the vertical partition member and the vertical frame member on the suspension source side constituting the rectangular frame body is the suspension side door internal space, the handle side vertical partition member and the handle constituting the rectangular frame body The door interior space between the vertical frame member on the side is the handle side door interior space, the door interior space between the two longitudinal partition members is the central door interior space, and both ends of the predetermined sound absorbing space forming material are By arranging a plurality of stages in the space in the central door so as to be in contact with the opposing side surfaces of the two vertical partition members, respectively. A sound insulating door which divides the central door inner space into a plurality of divided spaces along a longitudinal direction, wherein the vertical partitioning material on the suspension source side so that each divided space communicates with the interior space on the suspension source side door Provided with a first through hole, and a second through hole is provided in the vertical partition material on the handle side so that the divided spaces communicate with the space in the handle side door, and one of the face materials The suspension side slit is formed along the longitudinal direction to allow the interior of the suspension side door to communicate with the outside, and the handle side slit is formed along the longitudinal direction on the other face material. The interior space of the door is communicated with the outside, and the sound absorbing material surrounds each divided space by adhering the sound absorbing material to the opposing back surface of the pair of face materials and the opposing side surface of the sound absorbing space forming material. is there.

  In addition, the sound insulating door according to the present invention is configured such that at least one of the face materials is composed of a plate main body and a vibration damping material laminated on the back surface thereof.

  Moreover, the sound insulation door according to the present invention is such that the sound absorbing space forming material is formed in a V shape.

  In the sound insulation door according to the present invention, the sound absorbing space forming material is formed in a straight bar shape and arranged obliquely.

  In the conventional sound insulation doors, most of them are provided with an air inlet / outlet at the door lower side and the door upper side, and the doors are communicated along the longitudinal direction. For this reason, the communication space that becomes the air flow path becomes longer and the fluid resistance increases, and ventilation performance must be sacrificed.On the other hand, if the door design is given priority, the air inlet / outlet should be kept inconspicuous as much as possible. There was a problem that it had to be provided above the door.

  In view of this point, the present applicant has accumulated research and development from various viewpoints, and as a result, provided two air outlets as a slit that also serves as the design of the door front and back of the door. New knowledge that high performance can be given to both sound insulation and ventilation by communicating with each other through a communication space formed along the short direction. .

  That is, in the sound insulation door according to the first aspect, the predetermined sound absorbing space forming material is arranged in a plurality of stages in the space in the central door so that both ends thereof are in contact with the opposing side surfaces of the two vertical partition members, respectively. Thus, the central door space is partitioned into a plurality of divided spaces along the longitudinal direction.

  Moreover, while providing a 1st through-hole in the vertical partition material of the suspension side so that each division space may be connected with the space in the suspension side door, so that each division space may communicate with the space in the handle side door A second through hole is provided in the vertical partition member on the handle side, a suspension side slit formed in the longitudinal direction is provided in one of the face materials, and the space in the suspension side door communicates with the outside, and the longitudinal direction A handle-side slit formed in is provided on the other face material, and the handle-side door interior space communicates with the outside.

  If it does in this way, the slit formed in one face material will be used as an entrance, it will flow into the split space through the suspension side door inner space and the first through hole, and the second through hole and the handle side door inner space. The flow path with the slit formed in the other face material as an outlet or the opposite flow path is formed, and the length of the flow path is longer than that of the conventional method in which the communication space is formed in the longitudinal direction. Therefore, the flow resistance when air flows is reduced and ventilation performance is improved.

  The face material is desirably formed of a vibration damping material that suppresses the occurrence of plate vibration in a relatively low frequency band, for example, 125 Hz to 500 Hz, but is composed of a vibration damping material laminated on the plate body and the back surface thereof. A face material may be used.

  A portion that faces the divided space and surrounds the divided space, i.e., the opposite back surface of the pair of face members and the opposite side surface of the sound absorbing space forming material, has a sound absorbing material that absorbs a relatively high frequency band, for example, 500 Hz to 4 kHz. The sound absorbing space forming material itself is preferably formed of a sound absorbing material made of urethane or the like.

  The sound absorbing space forming material is arranged in a plurality of stages in the space in the central door so that one end of each is in contact with the opposite side surfaces of the two vertical partition members, but the sound absorbing space forming material has a straight shape. In addition, when it is arranged horizontally, the flow path length in each divided space becomes the shortest and the ventilation performance is greatly improved, but there is a concern that sufficient sound insulation performance cannot be secured.

  Therefore, in order to prevent the flow path in each divided space from being in a straight and horizontal direction (parallel to the short direction) so as to have the shortest length, in other words, the flow path in each divided space is non-linear or non-horizontal. It is desirable to construct or arrange the sound absorbing space forming material so that

  In this way, it becomes possible to prevent the air flow path from being excessively shortened, and it is possible to improve the ventilation performance by shortening the air flow path and to ensure the sound insulation performance by securing the flow path length. It is possible to balance and ensure both.

  Specific configurations in which the flow paths in each divided space are non-linear or non-horizontal include a configuration in which the sound absorbing space forming material is formed in a V shape or an inverted V shape, A configuration in which it is formed in a rod shape and arranged obliquely is conceivable. Moreover, the sound absorption space forming material may be formed in a saw shape or a wave shape, and may be arranged in a plurality of stages horizontally.

  Here, if the sound absorbing space forming material is formed in a V shape, it is possible to avoid the sound from propagating linearly along the path connecting the first through hole and the second through hole. It becomes easy to improve sound insulation. In this case, the sound-absorbing space forming material may determine the V-shaped angle so that the first through hole and the second through hole cannot be seen through.

  Embodiments of a sound insulation door 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.

  FIG. 1 is an exploded perspective view showing a sound insulation door according to the present embodiment, FIG. 2 is a sectional view, FIG. 3 is a front view, and FIG. 4 is a rear view. As can be seen from these drawings, the sound insulation door 1 according to the present embodiment includes a rectangular frame 8 and a pair of face materials 9a and 9b that are air-tightly joined to the front and back surfaces of the rectangular frame, respectively.

  The face materials 9a and 9b are composed of a plate main body 10 and a damping material 11 laminated on the back surface thereof, and the plate main body 10 may be constituted by laminating a decorative material on a medium-quality fiberboard (MDF). it can. Moreover, the damping material 11 can use the rubber sheet with a nonwoven fabric marketed, for example.

  The rectangular frame 8 includes a vertical frame member 2a located on the suspension side, a vertical frame member 2b located on the handle side, an upper frame member 3a connecting these upper ends, and a lower frame member 3b connecting these lower ends. Between the rectangular frame 4, the two horizontal partition members 5a and 5b arranged in parallel to the short direction in the composition plane of the rectangular frame, and the horizontal partition member It is composed of two vertical partition members 6a and 6b arranged in parallel to the longitudinal direction in the composition surface of the rectangular frame, and the horizontal partition members 5a and 5b are formed of the rectangular frame 8. The rigidity can be increased.

  As a door interior space surrounded by the rectangular frame 8, a suspension side door interior space 21 is provided between the suspension side vertical partition 6a and the suspension side vertical frame 2a, and the handle side vertical partition. A handle side door inner space 22 is formed between 6b and the handle side vertical frame member 2b, and a center door inner space 23 is formed between the vertical partition members 6a and 6b.

  Here, the central door inner space 23 is arranged in a plurality of stages with a sound absorbing space forming material 24 formed in a V shape so that both ends thereof are in contact with the opposite side surfaces of the vertical partition members 6a and 6b, respectively. In this arrangement, the central door space 23 is partitioned into a plurality of divided spaces 25 along the longitudinal direction.

  A through hole 28 as a first through hole is formed in the vertical partition member 6a on the suspension side so that each divided space 25 communicates with the space 21 on the suspension side door, and on the handle side A through hole 27 as a second through hole is formed in the vertical partition 6b so that each divided space 25 communicates with the handle side door inner space 22.

  In addition, the suspension member side slit space 12 is formed in the face material 9a along the longitudinal direction to allow the suspension source side door inner space 21 to communicate with the outside, and the face material 9b has a handle along the longitudinal direction. By forming the side slit 13, the handle side door inner space 22 is communicated with the outside.

  For example, the handle-side slit 13 preferably has an aesthetic appearance from the corridor side by fitting an L-shaped cosmetic material in the depth of the slit and having a cosmetic mall around the slit opening edge.

  On the other hand, a sound-absorbing material 31 is attached to the surface surrounding each divided space 25 among the opposed back surfaces of the pair of face materials 9a and 9b and the opposed side surfaces of the sound-absorbing space forming material 24 as shown in FIG. In FIGS. 1 and 2, the display of the sound absorbing material 31 is omitted for convenience.

  As can be seen well in FIG. 5, the sound absorbing material 31 is attached to the lower and upper surfaces of the sound absorbing space forming materials 24, 24 positioned above and below, and the back surfaces of the face materials 9a, 9b. It becomes a box shape.

  The sound absorbing material 31 may be appropriately selected from known materials. For example, a sound absorbing material made of PET fibers can be used.

  In the sound insulation door 1 according to the present embodiment, the sound absorbing space forming material 24 formed in a V shape is placed in the central door so that both ends thereof are in contact with the opposing side surfaces of the vertical partition members 6a and 6b, respectively. By arranging a plurality of stages in the space 23, the central door inner space is partitioned into a plurality of divided spaces 25 along the longitudinal direction, and each divided space 25 includes a suspension side door inner space 21 and a handle side door inner space. 22, a through hole 28 is provided in the vertical partition 6 a on the suspension side, a through hole 27 is provided in the vertical partition 6 b on the handle side, and a suspension side slit 12 is provided in the face material 9 a. The suspension side door inner space 21 communicates with the outside, and the handle side slit 13 is provided in the face material 9b so that the handle side door inner space 22 communicates with the outside.

  In this way, the suspension side slit 12 formed in the face material 9a is used as an entrance, and flows into the divided space 25 via the suspension side door inner space 21 and the through hole 28, and the through hole 27 and the handle side door inner space. Through 22, an air flow path having the handle-side slit 13 formed in the face material 9 b as an outlet or the opposite air flow path is formed.

  FIG. 6 shows that the sound insulation door 1 according to this embodiment is provided at the door opening of the partition wall 62 separating the living room or toilet and the hallway, and the inside (upper side in the figure) is made negative by operating the ventilation fan of the living room or toilet. It shows the flow of air when

  In this case, since the living room and the toilet are under negative pressure, air first flows into the suspension side door inner space 21 from the suspension side slit 12 formed in the face material 9a as shown by the arrow in the figure. Then, after flowing into the divided spaces 25 from the through holes 28, flowing into the handle side door inner space 22 through the through holes 27, they flow out from the handle side slit 13 to the living room or the toilet. Here, since the length of the air flow path is equal to the length of the door in the short direction, sufficient ventilation performance is ensured. In addition, the sound insulation door 1 is attached to the partition wall 62 with the hinge 61 similarly to a well-known door.

  On the other hand, among the sounds generated in the living room or toilet, plate vibration is suppressed by the damping material 11 of the face materials 9a and 9b for the low frequency components, and the high frequency components are surrounded by the divided spaces 25. Sound is absorbed by the disposed sound absorbing material 31. That is, the sound that has entered the handle-side door inner space 22 from the handle-side slit 13 enters the divided spaces 25 through the through holes 27 and then surrounds the V-shaped divided spaces 25. 31 and is attenuated by the frictional resistance when flowing through the handle side slit 13, the handle side door inner space 22, the through hole 27, the through hole 28, and the suspension side slit 12, thereby ensuring sufficient sound insulation performance. The

  As described above, according to the sound insulating door 1 according to the present embodiment, the length of the air flow path is significantly shorter and the resistance is smaller than the conventional structure in which the communication space is formed in the longitudinal direction. Ventilation performance is greatly improved. In addition, since it is not necessary to make a so-called undercut that provides a gap around the door, particularly between the door and the floor, it is possible to prevent light leakage from the living room or the toilet.

  In addition, according to the sound insulation door 1 according to the present embodiment, since the divided space 25 is formed by the V-shaped sound absorbing space forming material 24, the air channel length is prevented from being excessively shortened and the sound is reduced. Without being propagated linearly, it is possible to strike and absorb the sound absorbing material 31 that surrounds the divided space 25, and thus sound insulation can be sufficiently secured.

  In this embodiment, the V-shaped sound absorbing space forming material 24 is adopted as the sound absorbing space forming material, but the sound absorbing space forming material according to the present invention is not limited to such a configuration, and as shown in FIG. The straight-bar-shaped sound absorbing space forming material 24a may be disposed obliquely so that the joint end to the vertical frame member 6a is lower than the joint end to the vertical partition member 6b.

  Even in such a configuration, the same effects as those of the above-described embodiment can be obtained as described later.

  In the present embodiment, the two horizontal partition members 5a and 5b are arranged in the composition plane of the rectangular frame 4 so as to be parallel to the short direction, and the two horizontal partition members 5 are interposed between the horizontal partition members. Although the vertical partition members 6a and 6b are arranged, the horizontal partition members 5a and 5b are for enhancing the rigidity of the sound insulation door according to the present invention, and are basically unrelated to ensuring sound insulation and ventilation. As long as it is an element and can secure rigidity as a fitting, either one of the horizontal partition members 5a and 5b may be used, or both may be omitted in some cases.

  In the case of such a modification, the two vertical partition members are joined at the upper ends thereof to the lower surface of the upper frame member, or at the lower ends thereof are joined to the upper surface of the lower frame member, or the upper ends thereof are joined to the upper frame member. The lower surfaces and the lower ends thereof are respectively joined to the upper surface of the lower frame member.

(Test door specifications)

  FIG. 8 shows a front view of the test door (test body A) and FIG. 9 shows a front view of the test door (test body B) (a state in which the front face material is omitted).

  As can be seen from these figures, both specimens have the test body A incorporated only the lateral partition material corresponding to the lateral partition material 5b, while omitting the lateral partition material corresponding to the lateral partition material 5a. The test body B is different in that a horizontal partition material corresponding to the horizontal partition material 5a is also incorporated.

  All of the test bodies had a width of 705 mm, a height of 1,985 mm, and a thickness of 36 mm. The suspension side slit of the test body A was 10 mm × 1,475 mm, and the suspension side slit of the test body B was 10 mm × 1, 425 mm, the handle side slit of the specimen A was 12 mm × 1,754 mm, and the handle side slit of the specimen B was 12 mm × 1,425 mm.

  The sound absorbing space forming material was V-shaped, and the sound absorbing material was arranged in the same manner as in FIG. 5 using 4 mm PET resin. The V-shaped sound absorbing space forming material was manufactured at an angle of 30 degrees with respect to the horizontal axis. The damping material was a rubber sheet with a nonwoven fabric having a thickness of 1 mm, and the plate body was MDF having a thickness of 3 mm.

(Sound insulation confirmation test)

  The sound insulation test was conducted according to the following procedure. First, a speaker as a sound source and a microphone on the sound source side were installed in a living room to which the test door was attached, and a microphone on the sound receiving side was also installed outside the room and in the vicinity of the test door.

  The speakers are installed in a 45 degree direction toward the corner on the far side of the living room, so that they are diagonally upward. Five microphones on the sound source side are uniformly installed in the living room, and the microphones on the receiving side are 5 were uniformly installed at a position 250 mm away from the test door.

  Next, sounds of various frequencies were generated from the speakers, and the sound pressure levels were measured using a microphone on the sound source side installed in the living room and a microphone on the sound receiving side installed outside the room. The frequency of the sound to be generated was 125, 250, 500, 1K, 2K, 4K (Hz).

  Next, the sound pressure level difference (dB) between the room on the sound source side and the outside on the sound receiving side was obtained from the measurement results of each microphone. The measurement was performed in accordance with JIS A 1417: 2000 Method for measuring air blocking performance of buildings Annex 2 (normative) Method for measuring sound pressure level difference between specific locations.

  FIG. 10 is a graph showing the sound pressure level difference between the room interior and the exterior room obtained from the measurement. As can be seen in the figure, the sound pressure level difference of the test door is 18 to 19 dB at 125 Hz, 22 dB at 250 Hz, 24 dB at 500 Hz, 27 to 28 dB at 1 KHz, 27 to 28 dB at 2 KHz, 28 to 31 dB at 4 KHz, It was found that the sound insulation class D-25 (indicated by the alternate long and short dash line in the figure) can be cleared. Moreover, it turned out that the test body B which provided the horizontal partition material in the up-and-down stage has a higher sound insulation performance than the test body A provided only in the lower stage.

  It should be noted that the suspension side vertical frame material is tied to the suspension side vertical partitioning material without forming the suspension side door interior space, and the suspension side slit is not formed. In addition, an example in which an air inlet / outlet is provided in the door-side edge of the door by forming a through hole similar to that of the door-side vertical partition member is shown as a reference specimen.

(Ventilation confirmation test)

  In order to grasp the ventilation performance, the measurement was performed in accordance with the measurement method described in JIS A1516-1998 “Airtight test method for joinery” to obtain the equivalent clearance area (αA). The measurement was performed using a dynamic wind pressure test apparatus similarly defined in JIS A1516-1998 “Airtight test method for joinery”.

  As a result of the measurement, it was confirmed to have an equivalent gap area described below.

Positive pressure (pressurization to the open side) αA = 49.4cm ²
Negative pressure (pressurization to the closing side) αA = 48.5cm ²

The disassembled perspective view of the sound insulation door which concerns on this embodiment. It is a figure of the sound insulation door which concerns on this embodiment, (a) is a front view of the state which excluded the near face material, (b) is a vertical sectional view along an AA line direction, (c) is BB The vertical sectional view which follows a line direction. The front view of the sound insulation door which concerns on this embodiment. The rear view of the sound insulation door concerning this embodiment. It is the figure which showed the arrangement | positioning condition of a sound-absorbing material, (a) is a perspective view, (b) is a vertical sectional view. The cross-sectional view of the sound insulation door which showed the flow of air. The front view of the sound insulation door which concerns on a modification. The front view of the test body A. FIG. The front view of the test body B. FIG. Graph showing sound insulation performance.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sound insulation door 2a, 2b Vertical frame material 3a Upper frame material 3b Lower frame material 4 Rectangular frame body 5a, 5b Horizontal partition material 6a, 6b Vertical partition material 8 Rectangular frame 9a, 9b Face material 11 Damping material 12 Suspension origin Side slit 13 Handle side slit 21 Hanging source side door inner space 22 Handle side door inner space 23 Central door inner space 24, 24a Sound absorbing space forming material 25 Divided space 28 Through hole (first through hole)
27 Through hole (second through hole)
31 Sound absorbing material

Claims (4)

A rectangular frame in which two vertical partition members are arranged substantially in parallel along the longitudinal direction of the rectangular frame in the composition surface of the rectangular frame, and a front and back surfaces of the rectangular frame are airtight. A pair of face members joined to each other, and of the two vertical partition members, between the vertical partition member on the suspension source side and the vertical frame member on the suspension source side constituting the rectangular frame body The interior space of the door is the suspension side door interior space, the interior space of the door between the handle side longitudinal partition material and the handle side longitudinal frame material constituting the rectangular frame is the handle side door interior space, the two The inner door space between the vertical partition members is a central door inner space, and a predetermined sound absorbing space forming material is placed in the central door inner space so that both ends thereof are in contact with the opposing side surfaces of the two vertical partition members, respectively. The sound insulation door is divided into a plurality of divided spaces along the longitudinal direction by arranging a plurality of stages on the central door. A first through hole is provided in the vertical partitioning material on the suspension side so that each of the division spaces communicates with the space on the suspension side door, and each division space is formed in the handle side door space. A second through hole is provided in the vertical partition material on the handle side so as to communicate with each other, and a suspension side slit is formed in one of the face materials along the longitudinal direction so that the space in the suspension side door Is connected to the outside, and a handle side slit is formed along the longitudinal direction of the other face material so that the space on the handle side door communicates with the outside, and the opposite back surface of the pair of face materials and the sound absorbing space are formed. A sound insulating door characterized in that a sound absorbing material is attached to the opposite side surface of the material so as to surround each of the divided spaces with the sound absorbing material. The sound insulation door according to claim 1, wherein at least one of the face members is constituted by a plate main body and a vibration damping material laminated on the back surface thereof. The sound insulation door according to claim 1, wherein the sound absorbing space forming material is formed in a V shape. The sound insulation door according to claim 1, wherein the sound absorbing space forming material is formed in a straight bar shape and arranged obliquely.

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