JP5429783B2 - Sound insulation door and sound insulation ventilation structure using the same - Google Patents

Description

  The present invention relates to a sound insulation door used in a place where both ventilation performance and sound insulation performance are required, such as a living room and a toilet in a house, and a sound insulation ventilation structure using the same.

  Residential rooms and toilets require certain ventilation performance for health or hygiene reasons, but on the other hand, it is necessary to consider sound leakage to the surroundings and ensuring privacy. 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 below the door bottom face is known (patent documents 5-patent documents 7).

  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).

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

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, the sound insulation performance could not be secured with a simpler structure, or there was room for further development.

  The present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide a sound insulation door capable of realizing sound insulation performance at a reasonable cost and a sound insulation ventilation structure using the same.

  In order to achieve the above object, the sound insulation door according to the present invention has a face plate joined to the front and back surfaces of a rectangular frame, and each face plate and a shaft constituting the rectangular frame. A hollow space in the door surrounded by members is filled with a block material made of a wood-based material.

  In the sound insulation door according to the present invention, a sheet-like sound absorbing material is disposed on the back side of one of the face plates.

  The sound insulation door according to the present invention includes a first sound insulation layer arranged on the back side of one face plate among the face plates, and the block material arranged on the back side of the other face plate. In this case, a sheet-like sound absorbing material is sandwiched between the first sound insulating layer and the second sound insulating layer.

Moreover, the sound insulation door according to the present invention is filled with the block material so that an unfilled portion not filled with the block material does not substantially remain in the hollow space in the door.
Moreover, the sound insulation door according to the present invention is a block board made of the block material.

According to the sound insulation ventilation structure of the present invention, the sound insulation door according to any one of claims 1 to 5 is built in the door opening, and a gap between the lower edge of the sound insulation door and the floor surface is left as an undercut. In addition, the clearance between the peripheral edge of the sound insulation door excluding the lower edge and the door opening is configured to be airtight.

  In the past, it was common to leave an air flow path in the door in order to satisfy the ventilation performance. It was.

  Based on this point, the present applicant reexamined the sound insulation at the opening that becomes a ventilation path in the building, and as a result, under ventilation of the door (clearance of about 1 cm extending between the floor) R & D was conducted with a focus on the fact that ventilation using the door is necessary and sufficient, and that the door itself only needs to consider sound insulation. And if the block material is filled in the air flow path in the door, which was essential for ventilation in the past, this block material will greatly contribute to the improvement of the sound insulation performance. It is.

  That is, in the sound insulation door according to the present invention and the sound insulation ventilation structure using the same, the face plates are joined to the front and back surfaces of the rectangular frame, respectively, and are surrounded by the face members and the shaft members constituting the rectangular frame. The hollow space inside the door is filled with a block material made of a wood material.

  On the other hand, the clearance between the sound insulation door and its surroundings is left as an undercut for the clearance between the sound insulation door lower edge and the floor surface, while ensuring ventilation, while the space between the sound insulation door edge and the door opening excluding the lower edge Make up airtight.

  In this way, the door opening in which the sound insulation door is built is measured as a sound insulation grade that is an index of the sound insulation performance of the door as a result of measuring the sound pressure level difference by the measurement method defined in JIS A 1417: 2000. It was found that -20 can be almost cleared.

  This is because the transmission loss of the door part is greatly increased by the energy of the incident sound being absorbed by the block material or reflected by the block material. Even if there is sound transmission through the undercut, It means that the door itself can have sufficient sound insulation performance to make up for it.

  In other words, conventionally, ventilation is ensured by leaving a flow path through which air flows in the door interior space, and sound passage through the air flow path is prevented by devising the structure of the air flow path. However, in the present invention, the permeation loss is increased by filling the hollow space in the door with the block material based on the concept of the so-called mass rule, and ventilation is ensured by undercut, including the sound insulation door. The sound insulation performance and ventilation performance when viewed from the entire door opening are almost the same as those of the conventional technology, so the present invention, which is balanced at a lower cost, has extremely high industrial utility. It can be said.

  The rectangular frame can be arbitrarily configured as long as the entire sound insulation door can be given strength and rigidity, mainly bending strength and bending rigidity. For example, the frame in which the shaft member is arranged in a rectangular shape and the surface of the frame It can be composed of a lattice-like or ladder-like stiffener disposed inside.

  The block material means a material that holds a certain three-dimensional shape and can be filled into the hollow space in the door while retaining the three-dimensional shape. A fiber-based material such as glass wool has a specific three-dimensional shape. It is not included in the block material referred to in the present invention in that it does not have. Further, the term “filling” means that the hollow space is occupied by being disposed in the hollow space, and includes all the concepts such as laying, packing, and closing.

  On the other hand, the block material does not limit the shape itself, and can be formed in any shape such as a square shape, a plate shape, or a cubic shape.

  The sound insulation door according to the present invention and the sound insulation ventilation structure using the door are not necessarily that the hollow space in the door is necessarily filled with the block material, but as long as sufficient sound insulation performance is secured. It is assumed that a part of is left as it is.

  Here, the ratio left as a hollow space is defined as the ratio of the area of the unfilled portion to the found area of the entire door (area viewed from the front, excluding the occupied area by the frame material, etc.), and this is the unfilled ratio Then, the unfilling rate is 20% or less, desirably 10% or less, and more desirably 5% or less.

  The upper limit described above is provided for the unfilled rate. When the value exceeds 10%, there is a concern that the sound energy passing through the hollow space becomes large and the sound insulation performance is insufficient. When the value exceeds 20%, the necessary sound insulation performance is obtained. This is because it cannot be secured. On the other hand, 5% or less is desirable because it is possible to ensure the necessary sound insulation performance in such a hollow space.

  The sound insulation door according to the present invention has a sound insulation characteristic that is practically used only by the above-described configuration as long as it is a relatively low frequency band up to about 500 Hz. Of each face plate, a sheet-like shape is provided on the back side of one face plate. The sound absorbing material is arranged, or among the face plates, the block material is arranged on the back side of one face plate to form a first sound insulation layer, and the block material is arranged on the back side of the other face plate to provide a second sound insulation layer. If a sheet-like sound absorbing material is sandwiched between the first sound insulation layer and the second sound insulation layer, the sound insulation class D-20 is cleared and the sound insulation higher in the high frequency band of 500 Hz or more is obtained. Characteristics can be secured.

  The sheet-like sound absorbing material can be composed of, for example, PET fibers.

  The block material can be composed of an arbitrary woody material, for example, a particle board.

The exploded front view of the sound insulation door concerning this embodiment. Sectional drawing which showed the sound insulation ventilation structure using the sound insulation door which concerns on this embodiment along the AA line of FIG. The sound insulation ventilation structure which concerns on a modification. The frequency characteristic figure of a sound pressure level difference.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a sound insulating door and a sound insulating ventilation structure using the same according to the present invention will be described 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 front view showing a sound insulation door according to the present embodiment, and FIG. 2 is a horizontal sectional view of a sound insulation ventilation structure using the sound insulation door of FIG. As can be seen from these drawings, the sound insulating door 1 according to the present embodiment includes an outer peripheral portion 2 and a central portion 4 fitted into the central opening 3 so as to have the same surface.

  The outer peripheral part 2 connects the rectangular outer peripheral frame 5 and the rectangular inner peripheral frame 7 positioned inside thereof with a connecting member 8 so as to form an endless ladder. Are joined to each other.

  The outer peripheral frame 5 and the inner peripheral frame 7 are composed of shaft members made of LVL (Laminated Veneer Lumber, single plate laminated material) so as to impart bending strength and bending rigidity to the entire door as a rectangular frame.

  The face plate 6 can be constituted by a decorative board in which reinforcing paper is pasted on MDF (medium fiber board).

  On the other hand, the central portion 4 is configured by connecting the inside of a rectangular outer peripheral frame 9 in a ladder shape with a connecting member 13 and joining face plates 6 and 6 to the front and back surfaces thereof.

  The outer peripheral frame 9 is also composed of a shaft member made of LVL (Laminated Veneer Lumber, a single plate laminated material) so as to give bending strength and bending rigidity to the entire door as a rectangular frame.

  A block member 10 is filled in a hollow space in the door surrounded by the shaft member constituting the outer peripheral frame 5, the shaft member constituting the inner peripheral frame 7, and the face plates 6 and 6. Similarly, the block member 10 is filled in the hollow space in the door surrounded by the shaft member and the face plates 6 and 6 constituting the outer peripheral frame 9.

  The block material 10 is composed of a particle board. Particleboards are obtained by applying an adhesive to a cut or crushed piece of wood and then hot pressing it. Various types of thickness and size are commercially available. What is necessary is just to cut | disconnect to a magnitude | size or a size and to make it fill the hollow space in a door. Of course, it is possible to reuse the waste material.

  Among the face plates 6 and 6, a sound absorbing material 12 is arranged on the back side of the face plate 6 on the room side. Such a sound absorbing material 12 can be formed by forming, for example, a PET resin in a sheet shape having a thickness of about 3 mm.

  In order to manufacture such a sound insulating door 1, the outer peripheral portion 2 and the central portion 4 are manufactured separately, and then the central portion 4 is made to be the same as the construction surface of the outer peripheral portion 2. The outer peripheral frame 9 of the central portion 4 and the inner peripheral frame 7 of the outer peripheral portion 2 may be bonded to each other.

  For example, the outer peripheral portion 2 is formed by setting the thickness of the face plates 6 and 6 to 3 mm, the thickness of the shaft members constituting the outer peripheral frame 5 and the inner peripheral frame 7 to 30 mm, and the thickness of the block member 10 to 27 mm. The thickness can be about 36 mm.

  Further, for example, the central portion 4 can have an overall thickness of about 24 mm by setting the thickness of the shaft member constituting the outer peripheral frame 9 to 18 mm and the thickness of the block member 10 to 15 mm.

  In addition, the sound insulation ventilation structure according to the present embodiment leaves a gap δh between the lower edge of the sound insulation door and the floor surface 21 as an undercut when the sound insulation door 1 is built in the door opening (see FIG. 1). In the gap between the peripheral edge of the sound insulating door 1 excluding the edge and the door opening, a packing 11 is provided to form the gap in an airtight manner (see FIG. 2).

  As described above, according to the sound insulation door 1 and the sound insulation ventilation structure according to the present embodiment, the outer periphery surrounded by the shaft member constituting the outer peripheral frame 5, the shaft member constituting the inner peripheral frame 7, and the face plates 6 and 6. The block material 10 is filled into the hollow space in the door of the portion 2, and the block material 10 is filled into the hollow space in the door at the center portion 4 surrounded by the shaft member and the face plates 6 and 6 constituting the outer peripheral frame 9. Therefore, the transmission loss of the outer peripheral part 2 and the central part 4 of the sound insulation door 1 increases, and the sound insulation door 1 and the undercut when the sound is transmitted from the living room side (lower side in FIG. 2) to the hallway side (also the upper side). The total transmission loss is also increased when the gaps such as these are combined.

  On the other hand, ventilation is secured by undercutting.

  Therefore, it is possible to provide sound insulation performance and ventilation performance for practical use in the door opening in which the sound insulation door 1 is built.

  Moreover, according to the sound insulation door 1 and the sound insulation ventilation structure according to the present embodiment, the sound absorbing material 12 made of PET resin is arranged on the back side of the face plate 6 on the living room side among the face plates 6 and 6, so that a relatively high frequency Sound insulation performance in the band can be increased.

  In addition, according to the sound insulation door 1 and the sound insulation ventilation structure according to the present embodiment, the sound insulation performance is enhanced by the block material 10 made of particle board, and therefore, discarded together with other woody materials at the time of dismantling. This makes it possible to process objects, and it is a sound insulation door that is superior in environment compared to the conventional case where it is necessary to separate fiber-based materials and foamed resin-based materials from wood-based materials.

  In this embodiment, particle board is adopted as the block material. However, the block material according to the present invention may be any wood-based material, and in addition to general wood, laminated wood, plywood, rubber core plywood, insulation It can be suitably selected from adhesive processed materials such as a ration board (soft fiber board), MDF (medium fiber board), and hard board (hard fiber board). In addition, as long as there is no problem in transportation and construction, it is desirable to select one having a high specific gravity.

  Moreover, in this embodiment, although it was set as the door of the type which inserts the thinner center part 4 in the center opening of the outer peripheral part 2, the sound-insulating door concerning this invention includes the flash door which does not have an unevenness | corrugation on the front and back. It is possible to apply to doors of various designs.

  Further, although not particularly mentioned in the present embodiment, it is not always necessary to fill the entire block hollow space with the block material 10, and if the unfilling rate is set to about 5% or less, sufficient sound insulation performance is ensured. be able to. Further, depending on the balance with the required sound insulation performance, the unfilling rate may be reduced to 10% or less, and further to 20% or less.

  Moreover, in this embodiment, although the sheet-like sound-absorbing material 12 was arrange | positioned at the back side of the one face plate 6, it replaces with this, and as shown in FIG. The block members 10 are arranged on the back side of the side face plate 6 to form a first sound insulation layer, and the block materials 10 are arranged on the back side of the face plate 6 on the hallway side to form a second sound insulation layer. The sheet-like sound absorbing material 12 can be sandwiched between the second sound insulating layers.

  On the other hand, if the sound insulation performance is sufficiently ensured, the sound absorbing material 12 may be omitted.

  In order to confirm the effect of the sound insulation door 1 according to the present embodiment, the test is performed according to the method of measuring the air pressure blocking performance of the JIS A 1417: 2000 building. It was. . The microphone positions in the sound source room and receiving room selected as specific locations are as follows.

Sound source room microphone: 5 points located 750mm from the door
(Microphone is facing up)
Sound-receiving room side microphone: 5 points located 250mm from the door
(Microphone is suitable for doors)

There were a total of four specimens, specimen A to specimen D. Here, the specifications of the test bodies A to D are shown below.
(a) Specimen A (Standard specimen)
Airtight structure; Mohair block material instead of packing 11 of sound insulation door 1; Not filled Sound absorbing material; Not installed
(b) Specimen B
Airtight structure: Same as sound insulation door 1 Block material: Not filled Sound absorbing material: Not installed
(c) Specimen C
Airtight structure: Same as sound insulation door 1 Block material: Same as sound insulation door 1 Sound absorption material: Not installed, but filled with the same material as the block material instead
(d) Specimen D
Airtight structure: Same as sound insulation door 1 Block material: Same as sound insulation door 1 Sound absorbing material: Same as sound insulation door 1 All the external dimensions of the test specimens A to D are the same, and the height of the outer peripheral part is 1,993 mm, and the width is It was 707 mm, the height of the center was 1,509 mm, and the width was 419 mm.

  FIG. 4 is a graph showing the sound pressure level difference between specific locations between the living room and the outside of the living room for each of the test bodies A to D. As can be seen from the figure, the difference in sound pressure level between specific locations is less than 20 dB in the entire frequency band for the test body A and in the low frequency band for the test body B.

  On the other hand, it can be seen that the specimens C and D have a sound pressure level difference between specific locations of approximately 20 dB over the entire frequency band, and about 25 dB in the frequency band near 500 Hz where it is easy to feel noise in daily life.

1 Sound insulation door 2 Outer part 4 Center part 5 Outer frame (rectangular frame)
6 face plate 7 inner frame (rectangular frame)
9 Outer frame (rectangular frame)
10 Block material 12 Sound absorbing material

Claims (6)

A face plate is joined to each of the front and back surfaces of the rectangular frame, and a block material made of a wood-based material is filled in the hollow space in the door surrounded by each face plate and the shaft member constituting the rectangular frame. Sound insulation door featuring. The sound insulation door of Claim 1 which has arrange | positioned the sheet-like sound-absorbing material in the back side of one face plate among each said face plate. Among the face plates, the block materials are arranged on the back side of one face plate to form a first sound insulation layer, and the block materials are arranged on the back side of the other face plate to form a second sound insulation layer. The sound insulation door according to claim 1, wherein a sheet-like sound absorbing material is sandwiched between the sound insulation layer and the second sound insulation layer. The sound insulation door according to any one of claims 1 to 3, wherein the block material is filled so that an unfilled portion not filled with the block material does not substantially remain in the hollow space in the door. The sound insulation door as described in any one of Claims 1 thru | or 4 which formed the said block material with the particle board. The sound insulation door according to any one of claims 1 to 5 is built in the door opening, leaving a gap between the lower edge of the sound insulation door and the floor as an undercut, and the periphery of the sound insulation door excluding the lower edge A sound insulation ventilation structure characterized in that a gap between the door opening and the door is airtight.

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