JP6653559B2 - door - Google Patents

Description

  The present invention relates to a door, and more particularly to a wooden door having fireproof and soundproof properties.

2. Description of the Related Art Conventionally, doors such as doors (sliding doors) and sliding doors of various materials have been used between entrances of living rooms, entrances to rooms of accommodation facilities, and rooms.
Among these, wooden doors are used as fire doors because they have excellent design properties and texture, and have a certain level of fire protection. This is because, although the surface material and the like are made of a combustible material made of wood, among the combustible materials, the burning progresses relatively slowly, and the performance of preventing the spread of fire (flame barrier performance) is recognized.
By the way, in recent years, apartment buildings and other accommodations and hotels and other accommodation facilities have increased the number of buildings with structures that easily reverberate, such as corridors and corridors in buildings. Soundproofing that does not leak into corridors is required.
In response to such a demand, in Patent Document 1, a core material having a fireproof and soundproof effect is loaded into a space formed by a frame body, and a fireproof sheet is provided so as to sandwich the core material from the front side and the back side. A wood fireproof soundproof door configured to have a wooden surface material attached to the front and back surfaces has been proposed.

JP-A-10-37617

However, the door of Patent Document 1 has a problem in sound insulation.
That is, the door is a shield, and it is known that the door has a sound insulation effect according to the weight per unit area of the door. However, the door of Patent Document 1 is provided with one surface material on each of the front surface and the back surface. And a structure in which a sound insulation effect is provided solely by a member such as a core material.
Further, the door of Patent Literature 1 has insufficient measures against a coincidence effect in which a sound insulation effect is reduced in a predetermined sound range and a resonance transmission phenomenon in a low sound range.
The coincidence effect is a phenomenon in which when a sound of a specific frequency (coincidence frequency) is incident on a member, the member resonates, whereby the sound insulation is significantly reduced at a specific frequency. It is known that the coincidence frequency differs depending on the thickness of the same member.
In this regard, in the door of Patent Document 1, the same surface materials provided on the front side and the rear side have the same thickness (see FIGS. 3 to 6), and the respective surface materials have a common coincidence frequency. For this reason, it is conceivable that the sound insulation performance of the sound having such a frequency is significantly reduced.
The low frequency range resonance transmission phenomenon is a phenomenon in which sound of a specific frequency resonates via pulsation of air in an air layer in a laminated structure in which surface materials are stacked on both sides via an air layer.
In this regard, the door disclosed in Patent Document 1 has a space for loading the core material between the surface materials, so that a low-frequency resonance transmission phenomenon occurs with respect to a sound of a specific frequency. It is considered that the sound insulation performance is deteriorated.

  The present invention has been made in view of the above-described circumstances, and has an object of providing a door excellent not only in fireproofing but also in soundproofing by having a specific structure in which predetermined members are assembled and laminated. .

  The door according to the present invention has a frame material arranged in a square shape and a door having a surface material fixed on both sides of the frame material, wherein a plurality of frame materials are provided between facing frame materials of the square frame material. The space surrounded by the frame material is divided into a plurality of small spaces, and a surface material covering the plurality of small spaces is interposed between the space and the surface material; A plurality of first face materials each covering the plurality of small spaces, and the first face material covering the first face material, the frame material and the frame material, and being located between the surface materials. And a second face material integrally laminated.

  ADVANTAGE OF THE INVENTION According to this invention, the door which was excellent in soundproofing as well as fireproofing can be provided.

It is the schematic which shows the door which concerns on embodiment of this invention, (a) is a front view (including the figure which shows a partial internal structure), (b) is sectional drawing of AA part, (c) is A-. It is a principal part expanded sectional view of A part. It is a perspective sectional view of the B section of FIG. 1, (a) is a figure when the surface material has a two-layer structure, and (b) is a figure when the surface material has a four-layer structure. (A) is a front view of a first layer including a frame material, a frame material, and a core material, and (b) is an enlarged sectional view of a main part of an AA portion. (A) is a front view of the second layer including the first face material, and (b) is an enlarged cross-sectional view of a main part of the AA section. (A) is a front view of a third layer including a second face material and an auxiliary material, and (b) is an enlarged cross-sectional view of a main part of an AA portion. (A) is a diagram showing an arrangement of a frame member, and (b) is an enlarged cross-sectional view of a main part of an A-A part in the door of the first embodiment. Regarding the door of the second embodiment, (a) is a diagram showing an arrangement of frame members, and (b) is an enlarged sectional view of a main part of an AA portion. (A) is a diagram showing an arrangement of frame members, and (b) is an enlarged cross-sectional view of a main part of an A-A part, regarding the door of the third embodiment. (A) is a diagram showing an arrangement of a frame member, and (b) is an enlarged cross-sectional view of a main part of an AA portion, with respect to the door of Example 4. (A)-(d) is a table which shows the sound transmission loss regarding Examples 1-4.

Hereinafter, a door according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.
As shown in FIG. 1A, the door 1 of the present embodiment is formed of a square door plate. For example, a hinge (not shown), a lever handle, or the like is attached to the door plate to produce a hinged door (door). You. The door plate can be used not only for doors but also for sliding doors and other doors.
As shown in FIGS. 1A to 1C and 2, the door 1 includes a frame member 2, a frame member 3, a core member 4, a face member 5, a surface member 6, and an auxiliary member 7. It is configured to be combined and laminated.
Specifically, the door 1 forms a plurality of small spaces by arranging a plurality of frame members 3 between the facing frame members 2 of the frame members 2 arranged in a square shape, and forming a plurality of small spaces. It is formed by covering the face material 5 in a state where the core material 4 is loaded, and further stacking the entire door plate with the surface material 6.
The face material 5 and the face material 6 each have a double structure in which two plate-like members are laminated. The face material 5 is a first face material 51 and a second face material 52, and the face material 6 is a first material. It is composed of a surface plate 61 and a second surface plate 62. The auxiliary member 7 is provided on the outer periphery of the second face member 52.
Next, each of these members will be described in detail.

The frame member 2 is a member disposed along the entire outer periphery of the door 1 and plays a role of suppressing the warpage of the door 1 during normal operation and during combustion.
For this reason, a wooden material having a relatively high density is used as the frame material 2.
Specifically, a rubber laminated material or a pine laminated material of 0.6 / cm ^{3 to} 0.8 / cm ³ is used.
In the present embodiment, a rubber laminated material having a density of 0.6 g / cm ³ is used as the frame 2.

The frame member 3 is a member for maintaining the smoothness of the surface member 6 and increasing the rigidity of the entire door 1. The frame member 3 is provided with a vertical frame member 3 a disposed in the longitudinal direction along the inside of the frame member 2, A lateral frame member 3b disposed in the width direction along the inner side of the second frame member 2 and disposed at predetermined intervals in the horizontal direction between the upper frame member 2 and the lower frame member 2; have.
In the present embodiment, the spacing between the horizontal frame members 3b is set to be 463 mm or less for a door having a height of 2400 mm. This is because if the distance between the horizontal frame members 3b is larger than 463 mm, the surface material 6 is likely to be distorted at normal times, and the required rigidity cannot be obtained, and the overall distortion of the door 1 at the time of combustion is increased and the flame shielding effect is reduced. It is because.
Further, the frame member 3 arranged along the inside of the frame member 2 can be omitted.
The “frame member” in the present invention includes a case where the frame member is composed of only the frame member 2 and a case where the frame member is composed of the frame member 2 and the frame member 3 arranged along the inside of the frame member 2.

As shown in FIG. 2, the frame member 3 has the same thickness as that of the frame member 2, and has notches corresponding to the thickness of the first surface member 51 on the front surface and the rear surface of the end facing the core member 4. To prevent the first face material 51 from protruding from the front surface or the back surface of the frame material 3 when the first face material 51 is provided. In other words, by setting the surface of the first surface material 51 and the surface of the frame material 3 to the same level, the second surface material 52 can be adhered to the first surface material 51 and the frame material 3 with good bonding so that there is no gap. Like that.
When the frame member 3 is omitted, the notch is formed in the frame member 2.

The core material 4 is a member having fire resistance and sound absorbing properties, and is loaded in each of small spaces separated by the horizontal frame material 3b. Since the core material 4 occupies a certain volume in the internal space of the door 1, a lightweight material is preferable.
In the present embodiment, rock wool (density 80 kg / m ³ ) is used as the core material 4. However, the present invention is not limited to this, and other members having fire resistance and sound absorbing properties can be used as the core material 4. For example, glass wool, a phenol resin foam plate, a calcium silicate heat insulating plate, or the like can be used.

The first face material 51 is a plate-shaped member having sound insulation properties. In a state where the core material 4 is loaded in a plurality of small spaces separated by the horizontal frame material 3b, the small spaces are separated from the front side and the back side. It is arranged to cover. Thereby, the core member 4 is fixed, and the subsequent work efficiency can be improved.
In addition, when an inorganic member is used as the second face member 52 described later, the inorganic member is relatively brittle, and the second face member 52 cannot withstand the impact due to the work at the time of manufacturing or the stress due to the weight of the core material. May cause tearing or peeling.
For this reason, the first face material 51 also plays a role of supplementing the mechanical strength of the second face material 52.
Specifically, the first face material 51 uses MDF (medium density fiber board) having a thickness of 2.5 to 5.5 mm and a density of 0.6 to 0.9 g / cm ³ . In the present embodiment, MDF having a density of 0.8 g / cm ³ is used as the first face material 51.
However, the present invention is not limited to this. For example, ordinary plywood, particle board, HDF (High Density Fiber Board), or the like can be used as the first face material 51 as a member having sound insulation properties.

The second face material 52 is a plate-like member having a fire resistance that does not cause melting deformation and fracture even at an ultra-high temperature of about 1000 degrees. It is arranged so as to cover a part of the material 2 and the frame material 3.
As described above, the face material 5 has a double structure in which the first face material 51 and the second face material 52 are laminated, and is interposed between the face material 6 and the frame material 2 and the frame. Since it is difficult for the flame to directly hit the material 3 and the first face material 51, it is possible to enhance the flame shielding property of the door 1.
Further, by integrally laminating the first face material 51 and the second face material 52, the thickness of the face material 5 as a whole can be increased, and thereby the sound insulation of the door 1 can be improved.
In the present embodiment, as the second face member 52, an inorganic member such as a silica-alumina-impregnated glass nonwoven fabric (average mass 1400 g / m ² ) having a thickness of 2 mm is used. However, the present invention is not limited to this, and any member having the above-described fire resistance can be used as the second face material 52. For example, a volcanic glassy laminate, a calcium silicate plate, a gypsum board, a magnesium oxide board, or the like can be used as the second face material 52.

The auxiliary member 7 is a member for firmly bonding the surface member 6, and is provided on the outer periphery of the second surface member 52.
As described above, when an inorganic member is used as the second face member 52, the inorganic member is relatively brittle. For this reason, if the second face material 52 is used as an adhesive medium between the first face material 51, the frame material 2 and the frame material 3, and the surface material 6, if the second face material 52 is used during work and after installation, the impact and the temperature There is a possibility that the second face material 52 may be torn or peeled off due to the stress generated by the expansion and contraction of the material due to the difference / absorption of water.
For this reason, the auxiliary member 7 also has a role of compensating for the defect of the adhesiveness due to the low mechanical strength of the second face member 52.
The auxiliary member 7 has a thickness equal to or greater than that of the second face member 52. By doing so, the bonding surfaces of the frame member 2, the frame member 3, and the first surface member 51 and the surface material 6 surely come into contact with each other, so that they can be firmly bonded.
As the auxiliary material 7, specifically, ordinary plywood having a density of 0.6 to 0.9 g / m ³ is used. In the present embodiment, Rawan plywood having a density of 0.6 g / m ³ is used as the auxiliary material 7.
However, the invention is not limited thereto, and a veneer laminate, a natural wood board, a particle board, MDF, HDF, or the like can be used as the auxiliary material 7.

The surface material 6 is a wooden member that covers the entire surface of the door plate, thereby providing smoothness and design of the surface of the door 1. The surface material 6 is fixed to the base made of the auxiliary material 7 and the second surface material 52 by adhesion. The bonding between the surface material 6 and the base is performed using a liquid adhesive such as a vinyl acetate emulsion adhesive.
The surface material 6 constitutes one member by integrally laminating a plurality of surface plates. For example, as shown in FIG. 2A, a laminate of the first surface plate 61 and the second surface plate 62 can be used as the surface material 6, and as shown in FIG. A laminate of the one surface plate 61, the second surface plate 62, the third surface plate 63, and the fourth surface plate 64) can be used as the surface material 6.
For example, the first surface plate 61 and the second surface plate 62 use ordinary plywood having a thickness of 2.5 to 5.5 mm, and the third surface plate 63 and the fourth surface plate 64 have a thickness of 0.2 to 1.0 mm. Can be used.
As described above, by using the surface material 6 in which a plurality of surface plates are integrally laminated, the thickness of the entire door plate can be increased, and thereby the sound insulation of the door 1 can be improved.

  The surface material 6 of the present embodiment uses a laminate of the first surface plate 61 and the second surface plate 62, but is not limited thereto. For example, only the first surface plate 61 can be used as the surface material 6, and when three surface plates are used, the first surface plate 61, the third surface plate 63, and the second surface plate 62 are laminated in this order. The laminate can be used as the surface material 6. In addition, it can be selected from five or more surface plates.

The attachment of the surface material 6 is performed by bonding the first surface plate 61 and the second surface plate 62 in advance with an adhesive, and bonding them to a base in a state where they are integrally laminated.
This is the case where the first surface plate 61 is bonded to the base (the second surface material 52 or the like) and then the second surface plate 62 is overlapped and bonded (that is, each surface plate is individually bonded). ), A slight space is generated between the inorganic plate (second surface member 52) and the surface material 6 where irregularities are likely to occur, and in this state, the second surface plate 62 is placed on the first surface plate 61 in the liquid state. This is because when the adhesive is pressed using the adhesive described above, the adhesive flows due to the pressure and is stored in many places in the open space of the base of the surface plate, causing unevenness of the adhesive. That is, these spots cause a slight distortion of the surface material 6 as the adhesive dries, and become a design defect.
On the other hand, by previously laminating and bonding a plurality of surface materials to each other and bonding them to the second surface material 52 and the auxiliary material 7, distortion is less likely to occur on the surface, and the design can be maintained.

The joining of the members can be performed using a liquid adhesive or a U-shaped fitting.
For example, it is preferable that the face material 5 is joined to the target member using a U-shaped bracket. This is because the assumed temperature in the event of a fire is about 1000 degrees, so if an adhesive with a low melting point of the main component such as a vinyl acetate emulsion adhesive is used, it will not melt and maintain the bonding property, and the fire protection performance will not be maintained. Because it will be missing.
As described above, it is preferable that the surface material 6 and each surface plate constituting the surface material 6 be bonded using an adhesive, so that the design of the door 1 can be maintained.

[How to make doors]
Next, a method of manufacturing the door 1 using each of the above members will be described.
First, the frame material 2 is arranged in a square shape, and the vertical frame material 3a and the horizontal frame material 3b are arranged in the vertical and horizontal directions along the inside surrounded by the frame material 2, and the opposing upper frames are arranged. A horizontal frame member 3b is arranged between the member 2 and the lower frame member 2 at a predetermined interval. Thus, a plurality of small spaces separated by the horizontal frame material 3b are formed.
Next, the adjacent frame members 2 and frame members 3 are joined and fixed by a U-shaped bracket. In this way, the framework composed of the frame member 2 and the frame member 3 can be strengthened to the extent that it does not hinder carrying during manufacturing.
Subsequently, the core material 4 is loaded into each of the plurality of small spaces separated by the horizontal frame material 3b.
Thereby, as shown in FIG. 3, the first layer including the frame member 2, the frame member 3, and the core member 4 is formed.

Next, the front side and the back side of each small space are respectively covered with the first face material 51 and covered.
At this time, the first face member 51 is joined to the adjacent frame member 3 or frame member 2 by a U-shaped bracket. By doing so, the first face material 51 can be strengthened to the extent that it does not hinder carrying during manufacturing.
Thereby, the second layer composed of the first face material 51 shown in FIG. 4 is laminated on the first layer.

Subsequently, the auxiliary members 7 are arranged on the front and back surfaces of the frame member 2 combined in a rectangular shape along the outer periphery thereof, and are also arranged on the front and back surfaces of the horizontal frame member 3b.
Next, the second face member 52 is arranged in a region surrounded by the auxiliary member 7, and is joined to the frame member 2 and the frame member 3, which are the bases thereof, by a U-shaped bracket.
Thereby, the third layer composed of the auxiliary material 7 and the second face material 52 shown in FIG. 5 is laminated on the second layer laminated on the first layer.

Then, the production of the door 1 is completed by bonding the surface material 6 to the auxiliary material 7 and the second surface material 52.
Thereby, as shown in FIG. 2, the door 1 in which the first to third layers and the surface material 6 are laminated is formed.

According to the door 1 of the present embodiment manufactured as described above, the door 1 has excellent fireproofing and soundproofing properties.
Regarding fire protection, the core member 4, the face member 5, and the surface member 6 function as fire prevention members.
The core member 4 and the second face member 52 are fire-preventive members that themselves have fire-prevention properties. Further, although the surface material 6 is a combustible material, it burns relatively slowly among combustible materials, and can prevent the spread of a fire for a certain period of time (flame barrier performance).
In addition, the face material 5 and the face material 6 are members each formed by laminating a predetermined member in a double layer, and furthermore, since these members are arranged on both the front side and the back side, the flame insulating performance is further improved. Can be improved.
In addition, since the lateral frame members 3b are arranged at predetermined intervals to increase the rigidity of the door 1, the distortion of the surface material 6 can be suppressed in the event of a fire, and the flame shielding performance can be maintained.
That is, the door 1 of the present embodiment not only includes a fire prevention member but also includes a unique structure effective for fire prevention, thereby effectively enhancing fire prevention performance.

Regarding soundproofing, the core material 4, the face material 5, and the surface material 6 function as a soundproofing member.
Among these, the face material 5 and the face material 6 are shields, and exhibit a certain sound insulation effect.
Each of the face material 5 and the face material 6 is a member formed by laminating a predetermined member in a double manner, and further, these members are arranged on both the front side and the back side. For this reason, the weight per area (surface specific gravity) of the door 1 is increased, and the sound insulation effect can be further improved.
Of these, the surface material 6 covers the entire door 1, so that the entire door 1 can have an average sound insulation effect.
Although the area of the small space in which the core material 4 is loaded is relatively lacking in surface specific gravity, the surface material 5 is used in this portion to complementarily improve the sound insulation effect.
Further, the core member 4 is a member having a sound absorbing effect, and is a soundproof material which itself contributes to soundproofing. However, since the door 1 is limited in thickness, it is sandwiched between sound insulation members (face material 5 and surface material 6) on the front side and the back side, and reverberates the air sound inside the core material 4, and as a result, the sound is effective. It is made to attenuate periodically.
As described above, the door 1 of the present embodiment not only includes the soundproof member but also includes a unique structure effective for soundproofing, thereby effectively improving the soundproofing performance.

Here, a configuration of the door 1 according to the present embodiment that enables suppression of a drop in the sound insulation effect due to the coincidence effect and the low frequency range resonance transmission phenomenon will be described.
The coincidence effect refers to a phenomenon that the sound insulation performance of a sound having a specific frequency (coincidence frequency) corresponding to the thickness of a shield having a thickness is reduced.
The low-pass resonance transmission phenomenon refers to a phenomenon in which, when members of the same quality are stacked via air, the vibration of one member causes the other member to vibrate (resonate) through the pulsation of air, thereby lowering the sound insulation performance.
In the present embodiment, as a countermeasure against the coincidence effect, the thickness of the face material 5 and the surface material 6 is made different between the front side and the back side. The interval is made different.

[About the structure in which the thickness of the surface material 5 and the surface material 6 is different between the front side and the back side]
The door 1 of the present embodiment is configured such that either the face material 5 or the face material 6 located on both sides of the frame material 2 or the thickness of both the face material 5 and the face material 6 is different.
For example, in Examples 1 to 4 described later, as shown in FIGS. 6B, 7B, 8B, and 9B, the first face material 51 and the first face plate 61 are used. The thickness of one or both is changed between the front surface and the back surface.
Here, it is known that the coincidence frequency that causes the coincidence effect differs depending on the thickness in the case of members of the same quality.
For example, if the coincidence frequency of the first face material 51 having a thickness of 5.5 mm is f1 and the coincidence frequency of the first face material 51 having a thickness of 4.0 mm is f2, a relationship of f1 ≠ f2 is established.
Therefore, when the first face material 51 having a thickness of 5.5 mm is disposed on the front side and the first face material 51 having a thickness of 4.0 mm is disposed on the back side, and a sound having a frequency f1 is incident from the front side, Due to the coincidence effect, the light may pass through the first face material 61 on the front side, but does not pass through the first face material 51 on the back side. Further, when sound of frequency f1 is incident from the back side, the coincidence frequency of the first face material 51 on the back side is f2 (≠ f1), so that the sound is transmitted by the coincidence effect and is transmitted to the first face material 51 on the front side. Never reach.
On the other hand, if the first face material 51 having a thickness of 5.5 mm is disposed on the front side and the back side, and a sound having the frequency f1 is incident from the front side, the sound is caused by the first face material 51 on the front side due to the coincidence effect. The light passes through the first surface material 51 on the back side and reaches the surface material 6. Then, the sound of the frequency f1 is easily transmitted through the door 1, and the sound insulation performance is reduced. This is the same when sound is incident from the back side.
On the other hand, in the door 1 of the present embodiment, the thickness of the surface material 5 or the surface material 6 is made different between the front side and the back side, and the coincidence frequency is made different so that the coincidence effect is dispersed between the front side and the back side. ing.
For this reason, according to the door 1 of the present embodiment, there is no significant drop in the sound insulation performance due to the coincidence effect, and stable sound insulation performance can be exhibited.

[About the configuration in which the interval between the frame members of the horizontal frame member 3b is different]
The door 1 of the present embodiment has a configuration in which the sizes of the plurality of small spaces divided by the horizontal frame members 3b are different by erection with different intervals between the frame members of the adjacent horizontal frame members 3b. I have.
For example, with respect to Examples 1 to 4 described later, as shown in FIGS. 6A, 7A, 8A, and 9A, by changing the arrangement position of the horizontal frame member 3b. In addition, the spacing between the frame members is made uneven.
Thereby, the area of each section divided by the horizontal frame material 3b is made different, and the volume of the corresponding small space is made different.
Here, it is known that the low-tone-range resonance transmission effect resonates at a specific frequency according to the volume of air when the same plate material is stacked via air. This is because the repulsive force (deflection) of the plate material varies depending on the amount of air. More specifically, when the air is large, the repulsive force is weak, and resonance occurs at a lower tone than when the air is small. When the air is small, the repulsive force is strong, and the resonance is generated at a higher sound than when the air is large.
When this is applied to the door 1 of the present embodiment, the resonance frequency differs between a region where the space between the frame members of the horizontal frame member 3b is wide and a region where the space between the frame members is narrow.
For example, let f3 be the frequency that resonates in the region X where the space between the frame members 3b is X, and f4 is the frequency that resonates in the region Y where the space between the frame members of the horizontal frame material 3b is Y (<X). And
In this case, when the sound of the frequency f3 is incident on the door 1 of the present embodiment, the sound may be transmitted by the resonance due to the low-range resonance transmission effect in the region X, but the resonance may be transmitted in the region Y. Does not occur and no sound is transmitted.
On the other hand, if the interval between the frame members of the horizontal frame member 3b is uniformly set to X, when a sound of the frequency f3 enters, resonance occurs in all regions due to the low-pass resonance transmission effect, and the sound is transmitted. Will do. Therefore, the sound insulation performance of the sound having the frequency f3 is significantly reduced.
That is, the door 1 of the present embodiment has a configuration in which the intervals between the frame members of the horizontal frame members 3b are different, so that the frequency of the bass resonance transmission phenomenon that has conventionally occurred in the case of equal intervals is concentrated. Is dispersed.
For this reason, according to the door 1 of the present embodiment, there is no remarkable drop in the sound insulation performance due to the low sound range resonance transmission phenomenon, and stable sound insulation performance can be exhibited.

[Example 1]
As shown in FIG. 6B, 5.5 mm and 4.0 mm thick first face materials 51 (MDF) are arranged on the front side and the back side of the core material 4 (rock wool). A 2.0 mm second face material 52 (plywood) is provided, and the first face material 61 (plywood) having a thickness of 6.5 mm and 4.6 mm is provided thereon. The surface material 6 on which the surface material 62 (the veneer decorative plywood) is laminated is disposed, and as shown in FIG. 6A, the horizontal frame material 3b is replaced with the first frame material 31 and the second frame material 32, The distance between the fifth frame member 35 to the sixth frame member 36 is 312 mm, the second frame member 32 to the third frame member 33, the third frame member 33 to the fourth frame member 34, and the fourth frame member. The door 1 was manufactured by arranging the members 34 to the fifth frame member 35 at intervals of 463 mm.
For this door 1, sound transmission loss was measured for 18 bands of a 1/3 octave band center frequency of 100 to 5000 Hz based on JIS A1416, and the measured values shown in FIG. 10A were obtained. The measured value is a value obtained by converting the measured value of the 1/3 octave band based on JIS A4702.

[Example 2]
As shown in FIG. 7, a door 1 was manufactured in the same manner as in Example 1 except that a seventh frame member 37 was provided as the horizontal frame member 3b, and the interval between the frame members of the horizontal frame member 3b was changed.
Specifically, the interval between the first frame member 31 to the second frame member 32, the sixth frame member 36 to the seventh frame member 37 is 223.5 mm, and the second frame member 32 to the third frame member are arranged. The space between the third frame member 33, the fourth frame member 34, and the fifth frame member 35 is 300 mm, and the distance between the fifth frame member 35 and the sixth frame member 36 is 300 mm. The doors 1 were manufactured by arranging the side frame members 3b so as to be 463 mm.
And the same measurement as Example 1 was performed on this door 1, and the measured value shown in FIG. 10 (b) was obtained.

[Example 3]
As shown in FIG. 8, both the thickness of the front side material 51 on the front side and the back side is 5.0 mm, the thickness of the first surface plate 61 on the front side is 9.0 mm, and the thickness of the first surface plate 61 on the back side is 2. The door 1 was manufactured in the same manner as in Example 2 except that the distance was 3 mm.
Then, the same measurement as in Example 1 was performed on the door 1, and the measured value shown in FIG. 10C was obtained.

[Example 4]
As shown in FIG. 9, the thickness of the first side plate 51 on the front side is 4.0 mm, the thickness of the first side plate 51 on the back side is 2.7 mm, and the thickness of the first surface plate 61 on the front side and the back side is 2. Door 1 was manufactured in the same manner as in Examples 2 and 3, except that the distance was 3 mm.
Then, the same measurement as in Example 1 was performed on the door 1, and the measured value shown in FIG. 10D was obtained.

As shown in FIGS. 10A to 10D, the sound insulation performance in Examples 1 to 3 all satisfied the T3 class, and the sound insulation performance in Example 4 was evaluated to satisfy the T2 class.
In Example 2, as compared with Example 1, the number of the horizontal frame members 3b was increased and the spacing between the frame members was made more nonuniform, and as a result, a higher sound insulation performance was obtained at 500 to 2000 Hz. .
In Example 3, as compared with Example 2, as a result of increasing the thickness of the first surface plate 61 between the front surface and the back surface, at 250 Hz and 2000 to 4000 Hz, the sound insulation performance was evaluated to be higher. .
In Example 4, the thickness of the door plate was reduced by 10 mm to reduce the weight by reducing the thickness of the first face material 51 and the surface material 6 in comparison with Examples 1 to 3, but at 250 to 1000 Hz. Although the sound insulation performance was degraded by about 2 dB, it was evaluated to satisfy the T2 class.

  As described above, the present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to only the above-described embodiments, and various modifications can be made within the scope of the present invention. Nor.

For example, in the above-described embodiment, the door 1 in which the plurality of horizontal frame members 3b are arranged between the opposing upper frame member 2 and the lower frame member 2 has been described. The vertical frame member 3a may be arranged between the right frame members 2.
In this case, by arranging the vertical frame members 3a at different intervals between adjacent frame members, a region where resonance occurs is dispersed as in the above-described embodiment, and the sound insulation effect by the low-range resonance transmission effect is achieved. The fall can be suppressed.
Further, a plurality of horizontal frame members 3b are provided between the upper frame member 2 and the lower frame member 2 facing each other, and a plurality of horizontal frame members 3b are provided between the left frame member 2 and the right frame member 2 facing each other. It is possible to arrange the vertical frame material 3a, and to arrange the horizontal frame material 3b and the vertical frame material 3a at different intervals between adjacent frame materials.
Further, in the above-described embodiment, the face material 5 and the face material 6 are each configured to be double-layered, but any one or both of them may be stacked in triple or more.

  INDUSTRIAL APPLICATION This invention can be utilized in the technical field regarding doors, such as a door (opening door) and a sliding door.

DESCRIPTION OF SYMBOLS 1 Door 2 Frame material 3 Frame material 3a Vertical frame material 3b Horizontal frame material 4 Core material 5 Face material 51 First face material 52 Second face material 6 Surface materials 61 to 64 First to fourth surface plates 7 Auxiliary materials

Claims (5)

In a frame material arranged in a rectangular shape and a door having a surface material fixed on both sides of the frame material,
A space surrounded by the frame material is divided into a plurality of small spaces by laying a plurality of frame materials between facing frame materials of the rectangular frame material,
And, a surface material that covers the plurality of small spaces is interposed between the space and the surface material,
The face material covers a plurality of first face materials respectively covering the plurality of small spaces, and covers the first face material, the frame material and the frame material, and is located between the surface materials and the first face material. A door having a face material and a second face material laminated integrally. In a frame material arranged in a rectangular shape and a door having a surface material fixed on both sides of the frame material,
A space surrounded by the frame material is divided into a plurality of small spaces by laying a plurality of frame materials between facing frame materials of the rectangular frame material,
Before SL plurality of small spaces refractory and fibrous core material having a sound absorbing property is disposed respectively,
And, a surface material covering a plurality of small spaces in which the core material is provided is interposed between the surface material and the surface material,
The face material covers a plurality of first face materials respectively covering the plurality of small spaces, and covers the first face material, the frame material and the frame material, and is located between the surface materials and the first face material. A door having a face material and a second face material laminated integrally.   The door according to claim 1, wherein an auxiliary member is provided on an outer periphery of the second face member.   By constructing a plurality of frame members laid between opposed frame members of the rectangular frame member at different intervals between adjacent frame members, a plurality of small spaces divided by the frame members are formed. The door according to any one of claims 1 to 3, wherein the doors have different sizes.   The door according to any one of claims 1 to 4, wherein the surface material, the surface material, or the thickness of the surface material differs from the thickness of the surface material located on both sides of the frame material.

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