JP7306824B2 - Vent terminal member and building - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ventilation opening terminal member or the like having a structure in which a water droplet receiving plate is provided on a top plate of a hood portion via an elastic support.

Buildings such as collective housing, hotels, and office buildings are obliged to install ventilation equipment. As the ventilation equipment, a ventilation opening is installed in a living room, and a ventilation opening terminal member called a vent cap or the like is often installed on the outer wall of the living room.
The ventilation port terminal members are attached to the ventilation holes in the outer walls of the upper and lower floors of the building so that the hood protrudes outward from the outer wall surface, and the ventilation port terminal members of the upper and lower floors are positioned on a vertical line. There are many things.
In the building concerned, after rainfall, etc., when water droplets fall from the upper floor ventilation port terminal member and collide with the hood top plate of the lower floor ventilation port terminal member, a water drop collision sound is generated. , the water droplet impact sound propagates into the living room as solid-borne sound.
As a ventilation opening terminal member that takes measures to reduce the water droplet impact sound, for example, a structure in which a water droplet receiving plate is provided on the top plate of the hood via an elastic support is known ( See Patent Document 1).

Japanese Patent No. 5258712

However, in the ventilation opening terminal member disclosed in Patent Document 1, the primary natural frequency f ₀ of the vibration isolator composed of the elastic support and the water droplet receiving plate is high, and the middle and high frequencies at the time of the above-described water droplet falling collision Since the effect of reducing the sound in the band is not sufficient, there is a problem that the A-weighted sound pressure level cannot be reduced when the water drop collides.
DISCLOSURE OF THE INVENTION The present invention provides a ventilation opening terminal member or the like that can reduce the A-characteristic sound pressure level at the time of water drop collision and is excellent in the effect of reducing the water drop collision sound.

A ventilation port terminal member according to the present invention is a ventilation port terminal member that is attached to a ventilation hole formed in an outer wall of a building, and includes a hood portion projecting from the outer wall surface of the building to the outside of the building, an elastic support, A drip receiving plate provided on the top plate of the hood via an elastic support, and a mass, and the elastic support is connected to the top plate of the hood by bolts and nuts, or by welding or adhesive. and is connected to the drip pan plate by bolts and nuts or by welding or adhesive, and the mass is formed by a weight or reinforcing plate added to the drip pan plate , and comprises the drip pan plate, the elastic support, and the mass. The primary natural frequency f ₀ of the vibration isolator composed of the body is set to a frequency of 16 Hz or more and 125 Hz or less in the octave band.
According to the ventilation port terminal member configured as described above, the A-characteristic sound pressure level at the time of water droplet falling collision can be reduced, and the ventilation port terminal member is excellent in the effect of reducing the water droplet falling collision sound.
Further, a building according to the present invention is a building in which the vent terminal member is provided on the outer wall so that the hood portion and the water droplet receiving plate of the vent terminal member protrude outward from the outer wall surface. Since each water droplet receiving plate of each ventilation port terminal member provided on the outer wall of the upper and lower floors of the building is positioned on a vertical line, water droplets fall from the ventilation port terminal member on the upper floor and reach the ventilation port terminal on the lower floor. It is possible to provide a building that is excellent in the effect of reducing the water drop collision sound that is generated when the water drop receiving plate of the member collides.

The perspective view which looked at the ventilation port terminal member from the front side (Embodiment 1). The perspective view which looked at the ventilation port terminal member from the rear side (Embodiment 1). Front view of the ventilation port terminal member (Embodiment 1). Rear view of the vent terminal member (Embodiment 1). The figure which shows the state where a water drop falls to the lower ventilation port terminal member from the upper ventilation port terminal member attached to the outer wall of the upper and lower floors of a building (Embodiment 1). Sectional drawing which shows the structure of the vibration isolator of the ventilation port terminal member (Embodiment 1). Numerical table showing experimental results. Comparative graph showing experimental results. Numerical table showing experimental results Comparative graph showing experimental results. 7 is a graph showing the relationship between the primary natural frequency _f0 and the A-weighted sound pressure level of the vibration isolator of each specimen based on experimental results. 7 is a graph showing the relationship between the primary natural frequency _f0 and the A-weighted sound pressure level of the vibration isolator of each specimen based on experimental results. Sectional drawing which shows the structure of the vibration isolator of a ventilation opening terminal member (Embodiment 2). Sectional drawing which shows the structure of the vibration isolator of a ventilation opening terminal member (Embodiment 3). Sectional drawing which shows the structure of the vibration isolator of a ventilation port terminal member (Embodiment 4). Sectional drawing which shows the structure of the vibration isolator of a ventilation opening terminal member (Embodiment 5). Sectional drawing which shows the structure of the vibration isolator of a ventilation port terminal member (Embodiment 6).

Embodiment 1
As shown in FIGS. 1 to 6, the ventilation port terminal member 1 according to the first embodiment includes a tubular portion 2 inserted into a ventilation hole 92 formed in an outer wall 91 of a building 90 so as to communicate with the inside and outside of the building 90. , the hood portion 3 protruding outward from the outer wall surface 93 of the building 90, the water droplet receiving plate 5 provided on the top plate 32 of the hood portion 3 via the elastic support 4, and the water droplet receiving plate 5 and the vibration isolator composed of the water droplet receiving plate 5, the elastic support 4, and the mass X has a primary natural frequency _f0 of the octave band of 16 Hz or more and 125 Hz or less. is set to be
The cylindrical portion 2, the hood portion 3, and the water droplet receiving plate 5 of the vent terminal member 1 are formed of metal plates, for example.
In this specification, the top, bottom, left, right, front, and rear of the vent terminal member 1 are defined as the directions shown in FIGS.

As shown in FIGS. 1 and 2, the hood portion 3 is a rectangular parallelepiped having a square front plate 31, a top plate (upper plate) 32, a left plate 33, a right plate 34, and a rear plate 35. An indoor ventilation hole formed in the outdoor ventilation hole 36 (see FIG. 1) which is formed in a box shape and whose lower part is open, and which is opened at the center side of the rectangular plate forming the rear plate 35. 37 , and one end opening edge side of the cylindrical portion 2 is connected to the hole edge side of the indoor-side ventilation hole 37 . That is, the tubular portion 2 is connected to the rear plate 35 of the hood portion 3 and is provided so as to extend rearward of the rear plate 35 . The cylindrical portion 2 is formed in a cylindrical portion, for example.
That is, the hood portion 3 is provided with the ventilation port end member 1 attached to the ventilation hole 92, so that the hood portion 3 is ventilated from the inside of the building 90 to the outside of the building 90 through the lower outdoor side ventilation hole 36 and the indoor side ventilation hole 37. Alternatively, air can flow from the outside of the building 90 to the inside of the building 90.
At least one of the outdoor ventilation hole 36 and the indoor ventilation hole 37 is formed in the louver 38 (see FIG. 1).

In other words, the hood portion 3 includes a rectangular front plate 31 , a rear plate 35 having a plate surface facing the plate surface of the front plate 31 , and a rectangular upper side of the front plate 31 and the rectangular rear plate 35 . a left side plate 33 connecting the left side of the square extending downward from one end of the upper side of the square of the front plate 31 and the left side of the square rear plate 35 extending downward from one end of the upper side of the square; The right side plate 34 connects the right side of the square extending downward from the other end of the upper side of the square of the front plate 31 and the right side of the rear plate 35 extending downward from the other end of the upper side of the square. 1 is attached to the ventilation hole 92, the space surrounded by the front plate 31, the top plate 32, the left side plate 33, the right side plate 34 and the rear plate 35 is exposed to the outside through the lower outdoor side ventilation hole 36. , and communicates with the interior of the room via the interior ventilation holes 37 of the rear plate 35 .

That is, the ventilation port terminal member 1 is inserted into the ventilation hole 92 formed in the outer wall 91 of the building 90 from the other end side of the tubular portion 2, and the rear surface 35a of the rear plate 35 of the hood portion 3 is inserted into the building. 90, and installed so that the top plate 32 is positioned above, the left side plate 33 is positioned on the left side, and the right side plate 34 is positioned on the right side.
For example, a plate spring (not shown) is provided on the outer peripheral surface of the cylindrical portion 2, and when the cylindrical portion 2 is pushed into the ventilation hole 92, the plate spring is pressed against the inner surface of the ventilation hole 92 by spring elasticity. The ventilation port terminal member 1 is fixed to the ventilation hole 92 by being attached, and in this fixed state, a sealing material is filled in the gap between the upper edge, the left edge, and the right edge of the rear plate 35 of the hood part 3 and the outer wall surface 93. The ventilation port end member 1 is attached to the ventilation hole 92 by filling a gap filler such as a filler.

Further, at the lower end side of the rear plate 35 of the hood portion 3, there is a drain that receives water flowing along the plate surface of the hood portion 3 and directs the received water to the front side of the outer wall surface 93 away from the outer wall surface 93. A portion 39 is provided.
For example, the draining portion 39 protrudes from a back plate 39a formed by a portion of the rear plate 35 of the hood portion 3 that protrudes below the outdoor ventilation hole 36, and from left and right side edges of the back plate 39a on the lower end side. Projecting pieces 39b, 39b, an inclined piece 39c projecting forward and downward from the lower end of the back plate 39a and the lower ends of the left and right projecting pieces 39b, 39b, and the left and right side edges of the inclined piece 39c so as to rise upward. This is a configuration including left and right regulation pieces 39d, 39d provided.
Since the draining portion 39 is provided, the water droplets flowing along the plate surface of the hood portion 3 flow down to the front side of the outer wall surface 93 via the inclined piece 39c, and the ventilation attached to the ventilation hole 92 on the lower floor. Since the water droplets fall on the water droplet receiving plate 5 of the mouth terminal member 1, it is possible to prevent the water droplets from running down along the outer wall surface 93 and to prevent the outer wall surface 93 from being left with water marks.

The water droplet receiving plate 5 provided on the top plate 32 of the hood portion 3 via the elastic support 4 is composed of a roof-shaped plate material arranged so as to cover the top plate 32 of the hood portion 3. .
As shown in FIG. 1, for example, the top surface of the water droplet receiving plate 5 is formed in a roof shape in which the top of the hipped roof is a similar rectangular planar shape that is slightly smaller than the rectangle of the top plate 32 of the hood portion 3. be done.
In other words, the water droplet receiving plate 5 is formed, for example, by a rectangular plate that is one size smaller than the rectangle of the top plate 32 of the hood portion 3 and has a plate surface that is a predetermined distance from the plate surface of the top plate 32 of the hood portion 3 . The center plate portion 51 is arranged to face in parallel with a space therebetween, and each side edge of the rectangle forming the center plate portion 51 approaches each side edge of the corresponding rectangle of the top plate 32 of the hood portion 3. . . , which are formed of inclined plates that are inclined as shown in FIG.
The water droplet receiving plate 5 is arranged such that the center 5C of the rectangle forming the central plate portion 51 is on a vertical line V that is orthogonal to the plate surface of the top plate 32 of the hood portion 3 and passes through the center of the rectangle of the top plate 32. It is provided on the top plate 32 of the hood portion 3 via the elastic support 4 so as to be positioned at .

Then, as shown in FIG. 1 is provided, and the center 5C, 5C of each water droplet receiving plate 5, 5 of each ventilation port terminal member 1, 1 is positioned on a vertical line V to construct a building 90.
In the building 90, the water that flows along the plate surface of the hood portion 3 of the vent terminal member 1 installed on the upper floor and flows into the water draining portion 39 passes through the front end of the inclined piece 39c of the water draining portion 39 and flows to the lower floor. It drops onto the drip plate 5 of the vent terminal member 1 attached to the .

In order to reduce the A-weighted sound pressure level when water droplets collide with the water droplet receiving plate 5 , the elastic support 4 is placed on the top plate 32 of the hood portion 3 in the ventilation port terminal member 1 according to the first embodiment. A water droplet receiving plate 5 is provided through the water droplet receiving plate 5, and a mass body X is added to the water droplet receiving plate 5. The frequency f ₀ is set to a frequency of 16 Hz or more and 125 Hz or less in the octave band, more preferably 16 Hz or more and 63 Hz or less of the octave band.

A plate spring 60 is used as the elastic support 4 . As shown in FIG. 6, the leaf spring 60 includes a central plate portion 62 connected to the center side of the upper surface of the top plate 32, and both left and right ends of the central plate portion 62 extending perpendicularly to the upper surface of the top plate 32, respectively. The left and right rising plate portions 63, 63 extend in the direction approaching the central plate portion 51 of the water droplet receiving plate 5, and the left and right rising plate portions 63, 63 extend from the upper ends of the left and right rising plate portions 63, 63 so as to rise and incline in mutually opposite directions. and left and right inclined plate portions 64, 64 extending from the upper ends of the respective inclined plate portions 64, 64 in mutually opposite directions to contact the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5, thereby contacting the water droplet receiving plate 5. A shape having left and right end plate portions 61, 61 connected to both left and right sides of the central plate portion 51 was used.

That is, in the ventilation port terminal member 1 of Embodiment 1, as shown in FIG. The center plate portion 62 and the top plate 32 are connected by one or more sets of bolts 41 and nuts 42 with the center of the upper surface of the top plate 32 aligned with the center of the plate spring 60 connected to the top plate 32. Both left and right end plates 61 , 61 of the leaf spring 60 located above the plate portion 62 and the left and right sides of the central plate portion 51 are connected by bolts 41 and nuts 42 .
For example, a flat washer 43 and a spring washer 44 are installed between the lower surface of the top plate 32 and the nut 42 and between the lower surface of the end plate portion 61 and the nut 42 .

The mass body X is formed of, for example, a weight, a reinforcing plate, or the like, and is attached to the water droplet receiving plate 5 by connecting means such as screws, rivets, welding, adhesives, or adhesive tapes (not shown) so as not to be easily detached from the water droplet receiving plate 5. 5, for example, to the central side of the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5. As shown in FIG.
For example, a through-hole is provided in the center of the central plate portion 51 of the water droplet receiving plate 5, and a through-hole is provided to extend through the upper and lower surfaces of the mass body X. The water droplet receiving plate 5 and the mass body X may be coupled by screwing a nut from the tip side.

ここで、
ｆ_０：防振体の一次固有振動数（Ｈｚ）
ｍ：水滴受板側（＝水滴受板５＋質量体Ｘ）の質量（ｋｇ）
ｋ：弾性支持体のばね定数（Ｎ／ｍ） In addition, in the ventilation port terminal member 1 of Embodiment 1 and each of the embodiments described later, the primary natural frequency _f0 of the vibration isolator composed of the water droplet receiving plate 5, the elastic support 4, and the mass X is as follows. It can be calculated by the formula (1).

here,
f ₀ : primary natural frequency of vibration isolator (Hz)
m: Mass (kg) of the water droplet receiving plate side (= water droplet receiving plate 5 + mass body X)
k: spring constant of elastic support (N/m)

In general, in order to lower the primary natural frequency _f0 of the vibration isolator described above, the spring constant of the elastic support 4 should be reduced. The body 4 becomes too soft, making it difficult to establish the vibration isolator as a structure.
Therefore, in the present invention, without changing the spring constant of the elastic support 4, the mass X is added to the water droplet receiving plate 5 to increase the mass of the water droplet receiving plate side, thereby increasing the primary natural frequency of the vibration isolator. Focusing on lowering _f0 .

Experiments were conducted as follows to confirm the effect of reducing the impact sound of water droplets falling on the ventilation port terminal member 1 of the present invention.

・Experimental method An experiment was conducted in a simple anechoic chamber to simulate the situation in which water droplets fell on each test piece of the terminal member of the ventilation port attached to the air supply hole of an apartment house.
The experimental equipment is as follows.
A box with an inner diameter of 900 mm square (a box whose interior is sound-absorbing with glass wool) was installed at the bottom of the scaffold, and a test sample of the terminal member of the ventilation port was installed outside the front center position of the box, and a register (inside ventilation mouth) was installed. The register was made of resin and was of the push type, and was in the "open" state during the experiment.
Assuming the general floor height of an apartment building, a dropper was used to drop water droplets from a height of 3m onto the top of the test piece of the ventilation port terminal member.
For the measurement of the water droplet impact sound, a microphone was installed at the center position inside the box, and the A-weighted sound pressure level of the water droplet impact sound was measured. The number of times water droplets fell was set to 50 times for one test piece, and the average value of the data of 40 times with little influence from the outside was used as the measured value.

・Each specimen of the terminal member of the ventilation port The design values of each specimen of the terminal member of the ventilation port used in the experiment are as shown in Figs. 7 and 9 .
That is, in FIGS. 7 and 9,
(a) No countermeasure=ventilation port end member configured without a water droplet receiving plate on the top plate.
(b) Patent Literature 1 = Ventilation port terminal member having the configuration disclosed in Patent Literature 1 (spring constant k of the vibration isolator k = 248.8 N/mm, primary natural frequency f ₀ of the vibration isolator = 300 Hz).
(c) αg (mass of water droplet receiving plate α = 52 g, 136 g, 112 g) + 0 g = ventilation port terminal member having a configuration in which mass body X is removed from ventilation port terminal member 1 of Embodiment 1 (hereinafter, “no mass body”) called).
(d) αg (mass α of water droplet receiving plate = 52 g, 136 g, 112 g) + βg (mass β of mass body X = 26 g, 52 g, 78 g, 104 g) = vent terminal member 1 of Embodiment 1 (hereinafter referred to as “mass There is a body").
In addition, in each test body (c) without a mass and (d) with a mass, the spring constant k of the elastic support is k = 2.4 N / mm, k = 4.3 N / mm, k = Measurements were made using 8.3 N/mm, k=4.9 N/mm.
Further, the measurement was performed using a test body with a cylindrical portion having an inner diameter (φ) of 100 mm and a test body with a cylindrical portion having an inner diameter (φ) of 150 mm.

The material, dimensions, etc. of the test piece of each vent terminal member are as follows.
Common parts: cylindrical part, hood part, material of water droplet receiving plate: stainless steel SUS304, short side of water droplet receiving plate: 43 mm, long side: 150 mm.
The test piece with the inner diameter (φ) of the cylindrical portion of 100 mm has a thickness of the water droplet receiving plate of 1.0 mm and a weight of the water droplet receiving plate = 52 g, or a thickness of the water droplet receiving plate of 2.5 mm and a weight of the water droplet receiving plate = 136g.
For the test piece with the inner diameter (φ) of the cylindrical portion of 150 mm, the thickness of the water droplet receiving plate was 1.0 mm, and the weight of the water droplet receiving plate was 112 g.

- Experimental results Figs. 7 to 12 show the measurement results of the A-weighted sound pressure level of each test piece of the above-described ventilation port terminal member.
7 and 8 show the measurement results of the A-weighted sound pressure level when using a test piece having an inner diameter (φ) of 100 mm as the terminal member of the ventilation port of each test piece.
9 and 10 show the measurement results of the A-weighted sound pressure level in the case of using a test piece with a cylindrical inner diameter (φ) of 150 mm as the ventilation port end member of each test piece.
In addition, FIG. 11 shows the primary natural frequency f ₀ and the A-weighted sound of the vibration isolator of each test body when using a test body with a cylindrical inner diameter (φ) of 100 mm as the terminal member of the ventilation port of each test body. Fig. 2 shows the relationship with pressure level.
FIG. 12 shows the primary natural frequency f ₀ and the A-weighted sound pressure level of the vibration isolator of each test body when a test body with a cylindrical inner diameter (φ) of 150 mm is used as the terminal member of the ventilation port of each test body. indicates a relationship with

Comparing the measurement results of each test body with a cylindrical inner diameter (φ) of 100 mm, compared to the test body without countermeasures and the test body of Patent Document 1, the test body without and with the mass has an A-weighted sound It can be seen that the pressure level is low and the effect of reducing the impact sound of water droplets is excellent.
Furthermore, comparing the test specimen without the mass and the test specimen with the mass, it can be seen that the test with the mass has a lower A-weighted sound pressure level and is more effective in reducing the impact sound of falling water droplets. .
Similarly, in the measurement results of each test body with a cylindrical inner diameter (φ) of 150 mm, the test body with mass has a lower A-weighted sound pressure level than the other test bodies, It can be seen that the impact noise reduction effect is excellent.
As is clear from FIGS. 11 and 12, the A-weighted sound pressure level can be lowered by lowering the primary natural frequency _f0 of the vibration isolator.

In addition, when the thickness of the water droplet receiving plate is increased to increase the mass of the water droplet receiving plate itself, that is, in the case of a test specimen in which the weight of the water droplet receiving plate is 136 g, the primary natural frequency f ₀ of the vibration isolator is Since it becomes lower, the effect of reducing the sound in the middle and high frequency bands at the time of water droplet falling collision is improved, and the A-weighted sound pressure level at the time of water droplet falling collision is lowered. However, in this case, the thickness of the water droplet receiving plate must be increased, which causes a problem that the material cost of the water droplet receiving plate increases.
On the other hand, if the water droplet receiving plate is provided with the mass body X as in the first embodiment, the thickness of the water droplet receiving plate can be reduced and the material cost of the water droplet receiving plate can be reduced. It is possible to obtain a ventilation port terminal member that has a low A-weighted sound pressure level at the time and is excellent in the effect of reducing water droplet impact sound.

As is clear from the above, according to the ventilation port terminal member 1 according to the first embodiment, the tubular portion 2, the hood portion 3, and the top plate 32 of the hood portion 3 are provided via the elastic support 4. The water droplet receiving plate 5 and the mass body X added to the water droplet receiving plate 5 are provided. and can reduce the A-characteristic sound pressure level at the time of water droplet falling collision, and provide the ventilation opening terminal member 1 excellent in the effect of reducing the water droplet falling collision sound.
Further, according to the ventilation port terminal member 1 according to Embodiment 1, the primary natural frequency f ₀ of the vibration isolator composed of the water droplet receiving plate 5, the elastic support 4, and the mass body X is 16 Hz in the octave band. Since the frequency is set to be 125 Hz or less as described above, the effect of reducing the sound in the middle and high frequency bands at the time of water droplet collision is improved, and the A-weighted sound pressure level at the time of water droplet collision can be further reduced. It is possible to obtain the ventilator end member 1 that is excellent in the effect of reducing collision noise.

Embodiment 2
As shown in FIG. 13, in the ventilation port terminal member 1 of Embodiment 2, the elastic support 4 is configured by a leaf spring 60 as a spring, and the leaf spring 60 is attached to the central plate portion 51 of the water droplet receiving plate 5. A central plate portion 62 connected to the central side of the central plate portion 51 in contact with the lower surface 51u, and both left and right ends of the central plate portion 62 are perpendicular to the lower surface 51u of the central plate portion 51 and extend to the top plate 32 respectively. Left and right falling plate portions 63, 63 extending in a direction toward each other, and left and right inclined plate portions 64, 64 extending downward from the lower ends of the left and right falling plate portions 63, 63 so as to be inclined in opposite directions, A shape having both left and right end plate portions 61, 61 extending in mutually opposite directions from the lower ends of the respective inclined plate portions 64, 64 and connected to the top plate 32 in contact with the upper surface of the top plate 32. was used. That is, the leaf spring 60 described in the ventilation port terminal member 1 of Embodiment 1 is used upside down.

In the vent terminal member 1 of Embodiment 2, for example, as shown in FIG. 13, both the left and right end plate portions 61, 61 of the plate spring 60 are connected to the top plate 32 of the hood portion 3 by bolts 41 and nuts 42. At the same time, the central plate portion 62 of the leaf spring 60 and the central plate portion 51 of the water droplet receiving plate 5 positioned above both the left and right end plate portions 61, 61 of the leaf spring 60 connected to the top plate 32 are aligned with each other. It is configured to be connected by more than one set of bolts 41 and nuts 42 .
For example, a plain washer 43 and a spring washer 44 are installed between the lower surface of the top plate 32 and the nut 42 and between the lower surface of the central plate portion 62 and the nut 42 .

In the ventilation port terminal member 1 according to the second embodiment, the mass bodies X and X are added to the left and right sides of the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5, respectively. 5 and the mass bodies X, X so that the primary natural frequency f ₀ of the vibration isolator is a frequency of 16 Hz or more and 125 Hz or less in the octave band, more preferably 63 Hz in the octave band of 16 Hz or more. The frequencies were set as follows.

Embodiment 3
As shown in FIG. 14, in the ventilation port terminal member 1 of Embodiment 3, the elastic support 4 is composed of a plurality of leaf springs 60A and 60B as springs, and the plurality of leaf springs 60A and 60B and the water droplet receiving plate 5 and the mass X so that the primary natural frequency f ₀ of the vibration isolator is between 16 Hz and 125 Hz in the octave band, more preferably between 16 Hz and 63 Hz in the octave band. frequency.

The plate spring 60A includes both left and right end plate portions 61A, 61A that contact the upper surface of the top plate 32 and are connected to the top plate 32, and a curved plate portion 62A that connects the left and right end plate portions 61A, 61A. The one with the shape provided was used.
The plate spring 60B includes both left and right end plate portions 61B, 61B connected to the central plate portion 51 in contact with the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5, and both left and right end plate portions 61B, A shape having a curved plate portion 62B connecting between 61B was used.

In the vent terminal member 1 of the third embodiment, as shown in FIG. 14, both the left and right end plate portions 61A, 61A of one leaf spring 60A are connected to the left and right sides of the top plate 32 by bolts 41 and nuts 42. In addition, both the left and right end plate portions 61B, 61B of the other leaf spring 60B are connected to the left and right sides of the center plate portion 51 of the water droplet receiving plate 5 by bolts 41 and nuts 42, and the left and right ends of the one leaf spring 60A The central portion of the curved plate portion 62A of one of the plate springs 60A positioned above both the end plate portions 61A, 61A and the left and right end plate portions 61B, 61B of the other plate spring 60B positioned below the The central portion of the curved plate portion 62B of the other leaf spring 60B is connected by a bolt 41 and a nut 42. As shown in FIG.
Then, the mass body X is attached to the central side of the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5, for example.
Between the lower surface of the top plate 32 and the nut 42, between the lower surface of the end plate portion 61B of the other leaf spring 60B and the nut 42, and between the lower surface of the center portion of the curved plate portion 62A of the one leaf spring 60A and the nut 42, for example, a flat washer 43 and a spring washer 44 are installed.

Embodiment 4
As shown in FIG. 15, in the ventilation port terminal member 1 of Embodiment 4, the elastic support 4 is composed of a coil spring (compression coil spring) 60C as a spring and a support shaft 46, and the coil spring 60C and the support are configured. The primary natural frequency _f0 of the vibration isolator composed of the shaft 46, the water droplet receiving plate 5, and the mass body X is set to a frequency of 16 Hz or more and 125 Hz or less in the octave band, more preferably in the octave band. The frequency was set to be 16 Hz or more and 63 Hz or less.
The mass body X is attached to the central side of the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5, for example.

The coil springs 60C are composed of a left coil spring 60C arranged on the left end side of the central plate portion 51 of the water droplet receiving plate 5 and a right coil spring arranged on the right end side of the central plate portion 51 of the water droplet receiving plate 5. 60C was used.

For example, as shown in FIG. 15, the ventilation port terminal member 1 of Embodiment 4 has one end 61C of the coil spring 60C in contact with the top surface of the top plate 32 or connected to the top plate 32, and the coil spring The other end 62</b>C of 60</b>C is in contact with the lower surface of the water droplet receiving plate 5 or is connected to the water droplet receiving plate 5 .

Specifically, as shown in FIG. 15, support shafts 46, 46 are provided on the left and right sides of the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5 so as to protrude from the lower surface 51u. That is, the other end 46a of the support shaft 46 is attached to the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5 by fixing means such as welding.
Further, in the top plate 32 of the receptacle 3, shaft through-holes 47 for allowing the support shafts 46 to pass therethrough are formed at positions where the one ends 61C of the coil springs 60C are arranged.

In the ventilation port terminal member 1 of Embodiment 4, the support shaft 46 fixed to the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5 is moved from the other end 62C side of the coil spring 60C to the hollow portion of the coil spring 60C. and through the shaft through-hole 47 of the top plate 32 so that one end 46b side of the support shaft 46 protrudes downward from the lower surface of the top plate 32, and a shaft stop member 48 is attached to the one end 46b side of the support shaft 46, The other end 62C of the coil spring 60C is in contact with the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5, and the state in which the one end 61C of the coil spring 60C is in contact with the upper surface of the top plate 32 is maintained. be.

Further, in the fourth embodiment, the elastic support 4 connects the other end 62C of the coil spring 60C and the lower surface of the central plate portion 51 of the water droplet receiving plate 5 by fixing means such as welding or bonding, and also connects the coil spring 60C. The one end 61C and the upper surface of the top plate 32 may be connected by fixing means such as welding or adhesion.

Further, although not shown, in the fourth embodiment, the elastic support 4 does not include the support shaft 46. A configuration may be adopted in which they are connected by fixing means such as adhesion, and one end 61C of the coil spring 60C and the upper surface of the top plate 32 are connected by fixing means such as welding or adhesion.

That is, the ventilator terminal member 1 of the fourth embodiment is composed of a coil spring (compression coil spring) 60C as a spring for the elastic support 4, and the coil spring 60C, the water droplet receiving plate 5, and the mass body X. The primary natural frequency f ₀ of the vibration isolator is set to a frequency of 16 Hz or more and 125 Hz or less in the octave band, more preferably, a frequency of 16 Hz or more and 63 Hz or less in the octave band. good too.

Embodiment 5
As shown in FIG. 16, in the ventilation port terminal member 1 of Embodiment 5, the elastic support 4 is composed of rubber 70 and the plate spring 60 of Embodiment 1 (see FIG. 6), and the plate spring 60 and the rubber 70, the water droplet receiving plate 5, and the mass body X so that the primary natural frequency _f0 of the vibration isolator is a frequency equal to or higher than 16 Hz in the octave band and equal to or lower than 125 Hz, more preferably 16 Hz in the octave band. The frequency was set to 63 Hz or less.
The mass body X is attached to the central side of the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5, for example.

16, the central plate portion 62 of the plate spring 60 is connected to the central portion of the top plate 32 via the rubber 70 by the bolt 41 and the nut 42, and , both the left and right end plates 61, 61 of the leaf spring 60 positioned above the central plate portion 62 of the leaf spring 60 connected to the top plate 32, and the left and right sides of the central plate portion 51 of the water droplet receiving plate 5. are connected by bolts 41 and nuts 42 .
For example, a plain washer 43 and a spring washer 44 are installed between the lower surface of the end plate portion 61 and the nut 42 .

Specifically, the rubber connecting portion 7 between the central plate portion 62 of the plate spring 60 and the top plate 32 of the hood portion 3 is configured as follows.
A central plate portion 62 of the plate spring 60 is formed with a bolt through hole through which the bolt 41 is passed.
The rubber 70 has a cylindrical shape with a mounting hole 73 for mounting the metal cylinder 45 formed in the center and a ring-shaped groove 71 extending around the outer peripheral surface. is.
A fitting through hole 72 into which a cylindrical rubber 70 is fitted is formed in the top plate 32 of the hood portion 3 at a position where the central plate portion 62 of the plate spring 60 is connected.

The metal cylinder 45 is previously mounted in the mounting hole 73 of the rubber 70, and the hole edge of the fitting through hole 72 formed in the top plate 32 of the hood portion 3 is a ring-shaped groove of the cylindrical rubber 70. A rubber 70 is attached to the fitting through hole 72 so as to be fitted into the fitting through hole 71 .
After that, the central plate portion 62 of the leaf spring 60 is placed on the top plate so that the bolt through hole formed in the central plate portion 62 of the leaf spring 60 and the cylindrical hole of the metal cylinder 45 mounted inside the rubber 70 are aligned with each other. 32, the bolt 41 is passed through the bolt through hole of the central plate portion 62 of the plate spring 60 and the cylindrical hole of the metal cylinder 45, and the tip side of the bolt 41 is attached to the top. It projects downward from the other end surface of the rubber 70 that projects downward from the lower surface of the plate 32 .
Then, by fastening a nut 42 to the tip side of the bolt 41 projecting downward from the other end surface of the rubber 70 via, for example, a flat washer 43 and a spring washer 44, the central plate portion 62 of the plate spring 60 and the top plate 32 are connected by the bolt 41 and the nut 42 via the rubber 70 to form the rubber connecting portion 7 .
As shown in FIG. 14, one or more pairs of rubber connecting portions 7 connecting the central plate portion 62 of the plate spring 60 and the top plate 32 are provided.

Moreover, although not shown, in the fifth embodiment, the elastic support 4 has a structure in which at least one of the end plate portion 61 side of the plate spring 60 and the central plate portion 62 is connected by the rubber connecting portion 7 . Just do it. For example, in the elastic support 4 of Embodiment 5, both the left and right end plate portions 61, 61 of the leaf spring 60 are connected to the water droplet receiving plate 5 via the rubber connecting portion 7, and the central plate portion of the leaf spring 60 62 may be connected to the top plate 32 via the rubber connecting portion 7 .

That is, as shown in FIG. 16, the vent terminal member 1 of Embodiment 5 uses the same plate spring 60 of Embodiment 1, and the center plate portion 62 of the plate spring 60 and the center of the top plate 32 are attached. One or more pairs of rubber connecting portions 7 are used to connect to the side.
Note that the configuration of portions not particularly described in FIG. 16 is the same as the configuration of the first embodiment (FIG. 6).

Embodiment 6
As shown in FIG. 17, the vent terminal member 1 of Embodiment 6 has an elastic support 4 similar to the leaf spring 60 shown in, for example, Embodiment 1 (see FIG. 6) and Embodiment 5 (see FIG. 16). The primary natural frequency f ₀ of the vibration isolator composed of the rubber plate 600 as a rubber having a spring function formed in a similar shape and having the rubber plate 600, the water droplet receiving plate 5, and the mass body X is The octave band frequency is set to 16 Hz or more and 125 Hz or less, more preferably, the octave band frequency is set to 16 Hz or more and 63 Hz or less.
The mass body X is attached to the central side of the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5, for example.

The rubber plate 600 extends from a central plate portion 602 connected to the top plate 32 of the hood portion 3 and the left and right ends of the central plate portion 602 in directions perpendicular to the top plate 32 and approaching the water droplet receiving plate 5 . Left and right rising plate portions 603 and 603, left and right inclined plate portions 604 and 604 extending in opposite directions from the upper ends of the left and right rising plate portions 603 and 603, and the upper ends of the respective inclined plate portions 604 and 604. A shape provided with both left and right end plate portions 601, 601 extending in mutually opposite directions and connected to the water droplet receiving plate 5 was used.

That is, in the ventilation port terminal member 1 of Embodiment 6, as shown in FIG. A central plate portion 602 connected by a nut 42 and positioned below left and right end plate portions 601 , 601 connected to the left and right sides of the central plate portion 51 is attached to the central side of the top plate 32 with a bolt 41 and a nut. 42 is connected.
For example, a plain washer 43 and a spring washer 44 are installed between the lower surface of the top plate 32 and the nut 42 and between the lower surface of the end plate portion 601 and the nut 42 .

According to the ventilation port terminal member 1 of each of Embodiments 2 to 6, the elastic support 4 is a spring (plate spring 60, combination of plate spring 60A and plate spring 60B, coil spring 60C), or spring and rubber. 70, or a vibration isolator composed of a rubber plate (rubber) 600 and composed of the elastic support 4, the water droplet receiving plate ₅ , and the mass body X. is set to a frequency of 125 Hz or less, more preferably, a frequency of 16 Hz or more and 63 Hz or less in the octave band. The spring constant can be prevented from being made too small, and the vibration isolator can be established as a structural body, and the A characteristic sound pressure level at the time of water drop collision can be reduced, and the effect of reducing the water drop collision sound is excellent. It becomes the ventilation port terminal member 1.

That is, according to the ventilation port terminal member 1 of each of Embodiments 1 to 6, the vibration isolation region has a vibration transmissibility of 1 or less in a frequency band higher than the frequency corresponding to √2 times the primary natural frequency _f0 . , the vibration transmission from the water droplet receiving plate 5 to the hood portion 3 is suppressed, and the propagation of the vibration energy generated by the falling collision of the water droplets to the hood portion 3 can be suppressed.

Further, the frequency band around the primary natural frequency _f0 is a vibration amplification region, and by adopting the structure of the vibration isolator shown in each of Embodiments 1 to 6, the primary natural vibration of the vibration isolator Although the amplification factor at the resonance point of several f ₀ is large, the frequency band around the primary natural frequency f ₀ is a region where the amount of correction in the frequency correction A characteristic is large, so the sound pressure level that humans can feel is low. be a value.

Further, in the case where the elastic support 4 is configured to include the rubber connecting portion 7 as in the ventilation port terminal member 1 shown in Embodiment 5 (see FIG. 16), the damping effect of the rubber 70 of the rubber connecting portion 7 , the effect of reducing the amplification factor of the resonance point of the vibration isolator is given, so that the ventilator terminal member 1 that suppresses the harmful effects of the resonance point and improves the effect of reducing the water drop impact sound can be obtained.

Further, according to the ventilation port terminal member 1 according to the sixth embodiment (see FIG. 17), the elastic support 4 is composed of the rubber plate 600 formed so as to have a spring function. Therefore, the effect of reducing the amplification factor of the resonance point of the vibration isolator is imparted, and it is possible to obtain the ventilation port terminal member 1 that suppresses the harmful effects of the resonance point and improves the effect of reducing the water drop collision sound. can.

Further, according to the present invention, the ventilation port terminal member 1 is provided on the outer wall 91 so that the hood portion 3 and the water droplet receiving plate 5 of the ventilation port terminal member 1 protrude outward from the outer wall surface 93. By constructing a building 90 in which the drip receiving plates 5, 5 of the ventilation port terminal members 1, 1, ... provided on the outer wall 91 of the floor are positioned on the vertical line V, the ventilation port terminal of the upper floor is constructed. It is possible to provide a building 90 that is excellent in the effect of reducing the water drop collision sound generated when the water drops W fall from the member 1 and collide with the water drop receiving plate 5 of the ventilation port terminal member 1 on the lower floor.

Incidentally, the overall shape of the vent terminal member 1 may be round.
Further, the shape of the top plate 32 of the hood portion 3 of the vent port terminal member 1 and the water droplet receiving plate 5 may not be rectangular.
Further, the ventilation port terminal member 1 may be configured such that the opening is provided not only in the lower portion of the hood portion 3 but also in the side surface and the front surface of the hood portion 3 . Moreover, the structure with which the opening was covered with a net may be used.

Also, the ventilation port terminal member 1 may be configured to be directly attached to the outer wall without providing the cylindrical portion 2 .

Further, the connection between the water droplet receiving plate 5 and the elastic support 4 and the connection between the elastic support 4 and the top plate 32 may not be by bolts and nuts. For example, they may be connected by welding, adhesive, or the like.

The forms of the elastic support 4 and the water droplet receiving plate 5 are not particularly limited.

Further, in each embodiment, an example in which the mass body X is attached to the lower surface 51u of the water droplet pan plate 5 is shown, but the mass body X may be attached to the upper surface or the end surface of the water droplet pan plate 5. That is, it is sufficient that the mass body X is provided so as to protrude from the plate surface or end surface of the water droplet receiving plate 5 .

Further, a configuration in which the mass body X is added to the elastic support body 4 may be employed.

Incidentally, the mass body X may be made of any material.
Also, the number of mass bodies X may be one or more.

Further, in each embodiment, the primary natural frequency _f0 of the vibration isolator composed of the water droplet receiving plate 5, the elastic support 4, and the mass body X is set to a frequency of 16 Hz or more and 125 Hz or less in the octave band. However, the primary natural frequency _f0 of the vibration isolator composed of the water droplet receiving plate 5, the elastic support 4, and the mass body X is a frequency of 16 Hz or more and 125 Hz or less in the octave band. It does not have to be set so that For example, the primary natural frequency _f0 of the vibration isolator is set to a frequency slightly lower than 16 Hz of the octave band, or the primary natural frequency _f0 of the vibration isolator is set to a frequency slightly lower than 16 Hz of the octave band The frequency may be set to be slightly higher than 125 Hz.

1 vent terminal member, 3 hood portion, 4 elastic support, 5 water droplet receiving plate,
32 top plate of hood part, 90 building, 91 outer wall, 92 ventilation hole, 93 outer wall surface,
X mass.

Claims (2)

A ventilation port terminal member attached to a ventilation hole formed in an outer wall of a building,
A hood projecting from the outer wall surface of the building to the outside of the building, an elastic support, a water droplet receiving plate provided on the top plate of the hood via the elastic support, and a mass,
The elastic support is connected to the top plate of the hood portion by bolts and nuts, or by welding or adhesive, and is connected to the drip tray by bolts and nuts, or by welding or adhesive,
The mass is formed by a weight or reinforcing plate attached to the water droplet receiving plate ,
Ventilation characterized in that the primary natural frequency f0 of a vibration isolator composed of a water droplet receiving plate, an elastic support and a mass is _set to a frequency of 16 Hz or more and 125 Hz or less in an octave band. Mouth end member. A building in which the ventilation port terminal member according to claim 1 is provided on the outer wall so that the hood portion and the water droplet receiving plate of the ventilation port terminal member protrude outward from the outer wall surface,
1. A building characterized in that each water drip receiving plate of each ventilation port terminal member provided on the outer wall of upper and lower floors of the building is positioned on a vertical line.

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