JP2020106251A - Ventilation hole terminal member and building - Google Patents

Abstract

To provide a high-quality ventilation hole terminal member and the like that can reduce variation in sound pressure level when a water droplet drops and collides with a water droplet receiving plate.SOLUTION: A ventilation hole terminal member is fitted to a ventilation hole that is formed in an outside wall of a building. The ventilation hole terminal member includes: a hood part 3 protruding outside the building from an outside wall surface of the building; and a water droplet receiving plate 5 provided on a top plate 32 of the hood part 3 via a plate-like elastic support body 4 (leaf spring 60). A through-hole X is provided in a part of the elastic support body 4 which does not come into contact with the top plate 32 of the hood part 3 and the water droplet receiving plate 5.SELECTED DRAWING: Figure 7

Description

The present invention relates to a ventilation port terminal member and the like having a structure in which a water drop receiving plate is provided on a top plate of a hood section via an elastic support.

Ventilation equipment is required to be installed in buildings such as multi-family housing, hotels, and office buildings. As the ventilation equipment, a ventilation port is often installed in a living room, and a ventilation port terminal member called a vent cap or the like is often installed on an outer wall of the living room.
The ventilation port terminal members are attached to the ventilation holes of the outer wall of the upper and lower floors of the building, respectively, so that the hood portion projects outward from the outer wall surface, and the ventilation port terminal members of the upper and lower floors are located on the vertical line. Often.
In the building, when a drop of water drops from the ventilation port end member on the upper floor and collides with the top plate of the hood part of the ventilation port end member on the lower floor after rain, etc. The sound of the water drop falling collision propagates into the living room as solid propagation sound.
As a ventilation port terminal member that is provided with a measure to reduce the water drop drop collision sound, for example, one having a structure in which a water drop receiving plate is provided on an upper plate of a hood portion via an elastic support is known ( See Patent Document 1).

Japanese Patent No. 5258712

However, in the ventilation port terminal member disclosed in Patent Document 1, as is clear from the experimental result described later, there is a large variation in the sound pressure level at the time of collision of a water drop falling on the water drop receiving plate, and there is a problem in terms of quality. ..
The present invention provides a high-quality ventilation port terminal member and the like that can reduce variations in sound pressure level at the time of collision of a water drop falling on a water drop receiving plate.

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 to the outside of the building from an outer wall surface of the building, and a top plate of the hood portion. And a water drop receiving plate provided via a plate-like elastic support on the top, and a through hole is provided in a portion of the elastic support that is not in contact with the top plate and the water drop receiving plate. Therefore, it is possible to provide a high-quality ventilation port terminal member that can reduce variations in sound pressure level at the time of collision of water drops falling on the water drop receiving plate.
In addition, since the primary natural frequency f _{0 of the} vibration isolator constituted by the water drop receiving plate and the elastic support is set to be a frequency of 16 Hz or more in the octave band and 125 Hz or less, further water drop collision It is possible to provide a ventilation port terminal member that has an improved effect of reducing sound in the middle and high frequency bands during use, and that is excellent in the effect of reducing the sound of water droplet drop collision.
Further, the elastic support member is a plate member whose center side is attached to the top plate of the hood portion and both end portions thereof are attached to the water drop receiving plate, or the center side is attached to the water drop receiving plate and both end sides thereof are the hood portion. It is composed of a plate material attached to the top plate, and the through hole is composed of an elongated hole extending along the extension direction of the plate in the portion between the center side and the end side of the elastic support, It is possible to further suppress the variation in the sound pressure level at the time of a water drop collision, and it is possible to provide a higher quality ventilation port terminal member.
Further, the building according to the present invention is a building in which the ventilation port terminal member is provided on the outer wall so that the hood portion and the water drop receiving plate of any of the ventilation port terminal members described above project outward from the outer wall surface. As the water drop receiving plates of the ventilation port terminal members provided on the outer walls of the upper and lower floors of the building were located on the vertical line, water drops fell from the ventilation port terminal members of the upper floor and the ventilation port of the lower floor was opened. It is possible to provide a building in which variations in the sound pressure level of the water drop falling collision sound generated when the water drop collision plate of the terminal member collides can be reduced.

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 back side (Embodiment 1). The front view of the ventilation port terminal member (Embodiment 1). The rear view of a ventilation port terminal member (Embodiment 1). The figure which shows the state which water droplets drop from the upper ventilation port terminal member attached to the outer wall of the upper and lower floors of a building to the lower ventilation port terminal member (Embodiment 1). Sectional drawing which shows the structure of the vibration isolator of a ventilation port terminal member (Embodiment 1). The perspective view which shows an elastic support body and a water drop receiving plate apart (Embodiment 1). The top view which looked at the elastic support body from the top (Embodiment 1). The figure which shows an experimental result. The figure which shows an experimental result. Sectional drawing which shows the structure of the vibration isolator of a ventilation port terminal member (Embodiment 2). Sectional drawing which shows the structure of the vibration isolator of a ventilation port 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 port terminal member (Embodiment 5).

Embodiment 1
As shown in FIGS. 1 to 6, the ventilation port terminal member 1 according to the first embodiment has a cylindrical 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. And a hood portion 3 projecting outward from the outer wall surface 93 of the building 90, and a water drop receiving plate 5 provided on the top plate 32 of the hood portion 3 via a plate-shaped elastic support body 4, A through hole (slit) X is provided in a portion of the support 4 which is not in contact with the top plate 32 and the water drop receiving plate 5 of the hood portion 3, and is composed of the water drop receiving plate 5 and the elastic support 4. The primary natural frequency f _{0 of the} vibration isolator is set to be a frequency of 16 Hz or higher and 125 Hz or lower in the octave band.
The cylinder portion 2, the hood portion 3, and the water drop receiving plate 5 of the ventilation port terminal member 1 are formed of, for example, metal plates.
In this specification, the top, bottom, left, right, front, and rear of the ventilation port 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 including a square front plate 31, a top plate (upper plate) 32, a left side plate 33, a right side plate 34, and a rear plate 35. An indoor side ventilation hole which is formed in a box shape and is formed in the outdoor side ventilation hole 36 (see FIG. 1) whose lower part is opened, and which is formed by opening the central side of the rectangular plate forming the rear plate 35. 37, and one end opening edge side of the tubular 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 behind the rear plate 35. The cylindrical portion 2 is formed, for example, in a cylindrical portion.
That is, in the hood part 3, the ventilation port terminal member 1 is attached to the ventilation hole 92, so that the inside of the building 90 is exposed to the outside of the building 90 via the lower outdoor ventilation hole 36 and the indoor ventilation hole 37. Alternatively, air can flow from the outside of the building 90 to the inside of the building 90.
Further, at least one of the outdoor side ventilation hole 36 and the indoor side ventilation hole 37 is formed in the gallery 38 (see FIG. 1).

In other words, the hood portion 3 has a quadrangular front plate 31, a rear plate 35 having a plate surface facing the plate surface of the front plate 31, a quadrangular upper side of the front plate 31 and a quadrangular shape of the rear plate 35. A top plate 32 connecting the upper side, a left side plate 33 connecting the left side of the quadrangle extending downward from one end of the upper side of the quadrangle of the front plate 31 and the left side extending below one end of the upper side of the quadrangle of the rear plate 35, A right side plate 34 that connects a right side of a quadrangle extending downward from the other end of the quadrangle of the front plate 31 and a right side extending downward from the other end of the quadrangle of the quadrangle of the rear plate 35, and a ventilation port terminal member. When 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. It is configured to communicate with the inside of the room through the ventilation holes 37 on the inside of the rear plate 35.

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

Further, on the lower end side of the rear plate 35 of the hood portion 3, a water drainer for receiving water flowing along the plate surface of the hood portion 3 and flowing the received water to the front side of the outer wall surface 93 separated from the outer wall surface 93. The unit 39 is provided.
The draining part 39 projects from, for example, an inner plate 39a formed by a portion of the rear plate 35 of the hood portion 3 that projects below the outdoor ventilation holes 36, and left and right side edges on the lower end side of the inner plate 39a. The protruding pieces 39b, 39b, the lower end of the inner plate 39a and the inclined pieces 39c inclined forward and downward from the lower ends of the left and right protruding pieces 39b, 39b, and rising up from the left and right side edges of the inclined piece 39c. This is a configuration including the left and right restricting pieces 39d and 39d provided.
Since the water drain 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 are attached to the ventilation holes 92 on the lower floor. Since it drops onto the water droplet receiving plate 5 of the mouth end member 1, it is possible to prevent water droplets from flowing down along the outer wall surface 93 and to prevent water marks on the outer wall surface 93.

The water drop receiving plate 5 provided on the top plate 32 of the hood part 3 via the elastic support body 4 is configured by a roof-shaped plate material arranged so as to cover the top plate 32 of the hood part 3. ..
As shown in FIG. 1, for example, the upper surface of the water drop receiving plate 5 is formed into a roof shape in which the top of the ridge is a similar rectangular flat surface that is slightly smaller than the rectangle of the top plate 32 of the hood 3. To be done.
In other words, the water drop receiving plate 5 is formed of, for example, a rectangular plate that is slightly smaller than the rectangular shape of the top plate 32 of the hood portion 3 and has a plate surface that is a predetermined plane with the plate surface of the top plate 32 of the hood portion 3. A central plate portion 51 arranged to face each other in parallel at a distance, and each rectangular side edge of the central plate portion 51 approaches each rectangular side edge of the top plate 32 of the corresponding hood portion 3. And the peripheral plate portions 52, 52 formed by the inclined plates.
The water drop receiving plate 5 has a rectangular center 5</b>C that constitutes the central plate portion 51 on a vertical line V that is orthogonal to the plate surface of the top plate 32 of the hood part 3 and passes through the center of the rectangle of the top plate 32. Is provided on the top plate 32 of the hood portion 3 via the elastic support body 4 so as to be located at.

Then, as shown in FIG. 5, on the outer walls 91, 91 of the upper and lower floors, the hood portion 3 and the water drop receiving plate 5 of the ventilation port terminal member 1 are projected to the outside of the outer wall surface 93, respectively. 1 is provided, and the center 5C, 5C of each water drop receiving plate 5, 5 of each ventilation port terminal member 1, 1 is located on the vertical line V to form a building 90.
In the building 90, water flowing along the plate surface of the hood portion 3 of the ventilation port terminal member 1 attached to the upper floor to the water draining portion 39 passes through the front end of the inclined piece 39c of the water draining portion 39 to the lower floor. It falls on the water drop receiving plate 5 of the ventilation port terminal member 1 attached to the.

In the first embodiment, in order to provide a high-quality ventilation port terminal member 1 by reducing the variation in the sound pressure level at the time of a water drop drop collision with the water drop receiving plate 5, the hood portion 3 of the plate-shaped elastic support 4 is provided. A through hole X is provided in a portion which is not in contact with the top plate 32 and the water drop receiving plate 5, and the primary natural frequency f ₀ of the vibration isolator constituted by the water drop receiving plate 5 and the elastic support 4 is set to the octave band. Of 16 Hz or more and 125 Hz or less, and more preferably 16 Hz or more of the octave band and 63 Hz or less.

As the elastic support body 4, a leaf spring 60 was used. As shown in FIG. 6, the leaf spring 60 includes a central plate portion 62 connected to the central side of the upper surface of the top plate 32, and right and left end portions of the central plate portion 62 that are orthogonal to the upper surface of the top plate 32, respectively. Then, the left and right rising plate parts 63, 63 extending in a direction approaching the central plate part 51 of the water drop receiving plate 5 and the upper ends of the left and right rising plate parts 63, 63 are respectively extended so as to rise in opposite directions and incline. The left and right inclined plate portions 64, 64 extending in opposite directions from the upper ends of the inclined plate portions 64, 64, respectively, and contacting the lower surface 51u of the central plate portion 51 of the water droplet receiving plate 5, A shape having both 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 the first embodiment, as shown in FIG. 6, the elastic support body 4 is configured by the leaf spring 60 in which the through hole X is formed, and the central plate portion 62 of the leaf spring 60 is provided. The center plate portion 62 and the top plate 32 are connected by one or more sets of bolts 41 and nuts 42 in a state where the center and the center of the upper surface of the top plate 32 are aligned, and the plate connected to the top plate 32. The left and right end plate portions 61, 61 of the leaf spring 60, which are located above the central plate portion 62 of the spring 60, and the left and right sides of the central plate portion 51 are connected by bolts 41 and nuts 42.
In addition, 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.

That is, in the leaf spring 60 as the elastic support body 4 of the ventilation port terminal member 1 according to the first embodiment, the central plate portion 62 on the center side is attached to the top plate 32 of the hood portion 3 and the end portions on both left and right end portions are provided. The plate portions 61, 61 are made of a plate material such as a metal plate attached to the water drop receiving plate 5, and the through hole X has, for example, a portion between the central plate portion 62 and the end plate portion 61 of the leaf spring 60. The leaf spring 60 is formed of a long hole (slit) having a constant width extending along the extension direction of the leaf spring 60.
Specifically, as shown in FIGS. 7 and 8, the through hole X is a left through hole that extends along the extension direction of the leaf spring 60 over the entire area of the left rising plate portion 63 and the inclined plate portion 64. The hole X and the right through hole X extending along the extension direction of the leaf spring 60 over the entire area of the right rising plate portion 63 and the inclined plate portion 64 are formed.
The left through hole X and the right through hole X are provided on the center side of the rising plate portion 63 and the inclined plate portion 64 in the front-rear width direction. In other words, the left through-hole X and the right through-hole X have a plate width a between the front side edge X1 of the through hole X and the front side edge 60a of the rising plate portion 63 and the inclined plate portion 64, and the through hole. The rear side edge X2 of X and the rear side edge 60b of the rising plate portion 63 and the inclined plate portion 64 are arranged to be equal to each other in the front-rear width direction of the rising plate portion 63 and the inclined plate portion 64. It is formed on the center side.
In FIG. 7, reference numeral 56 is a bolt insertion hole formed on both right and left sides of the central plate portion 51 of the water drop receiving plate 5, and in FIGS. 7 and 8, reference numeral 57 is a central plate portion 62 of the leaf spring 60 and It is a bolt insertion hole formed in the end plate portions 61, 61.

ここで、
ｆ_０：防振体の一次固有振動数（Ｈｚ）
ｍ：水滴受板の質量（ｋｇ）
ｋ：弾性支持体のばね定数（Ｎ／ｍ） In the ventilation port terminal member 1 of the first embodiment and each of the embodiments described later, the primary natural frequency f ₀ of the vibration isolator including the water drop receiving plate 5 and the elastic support body 4 is calculated by the following equation (1). be able to.

here,
f ₀ : Primary natural frequency (Hz) of the vibration isolator
m: Mass of water drop receiving plate (kg)
k: Spring constant of elastic support (N/m)

Generally, in order to lower the primary natural frequency f ₀ of the vibration isolator described above, the spring constant of the elastic support 4 may be reduced, but if the spring constant of the elastic support 4 is too low, the elastic support 4 is elastically supported. The body 4 becomes too soft, and it becomes difficult to establish the vibration isolator as a structure.
Therefore, in such a case, the primary natural frequency f ₀ of the vibration isolator may be set to a target value (for example, 16 Hz or more in the octave band and 63 Hz or less) by increasing the mass of the water drop receiving plate 5. ..
For example, by adding a mass body such as a weight or a reinforcing plate to the water drop receiving plate 5, the mass of the water drop receiving plate 5 is increased to set the primary natural frequency f ₀ of the vibration isolator to a target value (for example, octave). The band may be set to 16 Hz or more and 63 Hz or less).

An experiment for confirming the water drop falling collision noise reduction effect of the ventilation port terminal member 1 of the present invention was conducted as follows.

-Experimental method An experiment was conducted in a simple anechoic chamber to simulate the situation in which water drops fell on each test piece of the ventilation port end member attached to the air supply hole of the apartment house.
The experimental equipment is as follows.
A box with an inner diameter of 900 mm square (a box with sound absorption treated with glass wool inside) was installed at the bottom of the scaffold, and a test piece of ventilation port end member was installed outside the center of the front of the box, and a register (inside ventilation) Mouth) was installed. The register was a push type made of resin, and was in the "open" state during the experiment.
Assuming the general floor height of an apartment building, a dropper was used to drop a drop of water from the position at a height of 3 m at the top of the test body of the ventilation end member.
For the measurement of water drop impact sound, a microphone was installed in the center of the box and the sound pressure level of 1/3 octave band of the water impact sound was measured. The number of drops of water drops on the top of the test body was 50 times per one test body.

Each test piece of the ventilation port terminal member used in the experiment is, as shown in FIG. 9 and FIG.
-With slit = ventilation port terminal member 1 of the first embodiment
No slit=Ventilation port terminal member provided with an elastic support member having no through hole (slit) X when compared with the ventilation port terminal member 1 of Embodiment 1 (ventilation port terminal member of Patent Document 1 equivalent ventilation Mouth end member)
Is.
The design values of the test piece with the slits are as follows: mass of water drop receiving plate=57 g, spring constant k of elastic support k=4.3 N/mm, and mass of water drop receiving plate=136 g, spring constant of elastic support. k=4.3 N/mm.
The design values of the test body without slits are as follows: mass of water drop receiving plate = 57 g, spring constant k of elastic support k = 4.9 N/mm, and mass of water drop receiving plate = 136 g, spring constant of elastic support. k=4.9 N/mm.
The material, dimensions, etc. of the test piece of each ventilation port end member are as follows.
Common parts=cylindrical portion, hood, water drop receiving plate material=stainless steel SUS304, water drop receiving plate 5 has a short side of 43 mm and a long side of 150 mm.

-Experimental result Fig.9 (a) is a 1/3 octave band center frequency-sound in the test body with a slit (mass of water drop receiving plate = 57 g, spring constant k of an elastic support body = 4.3 N/mm). The measurement result of the pressure level is shown.
FIG. 9B shows the 1/3 octave band center frequency-sound pressure level in a test body without slits (mass of water drop receiving plate=57 g, spring constant k of elastic support k=4.9 N/mm). The measurement results are shown.
FIG. 9C shows the standard deviation of the sound pressure level measurement value of 50 times in the 250 Hz band and the standard deviation of the sound pressure level measurement value of 50 times in the 1.6 kHz band as the test body with the slit. It is a chart compared with the test body without slit.
In addition, FIG. 10A shows a 1/3 octave band center frequency-sound pressure in a test body with slits (mass of water drop receiving plate=136 g, spring constant k of elastic support body=4.3 N/mm). The level measurement results are shown.
FIG. 10B shows the 1/3 octave band center frequency-sound pressure level in a test body without a slit (mass of water drop receiving plate=136 g, spring constant k of elastic support k=4.9 N/mm). The measurement results are shown.
FIG. 10C shows the standard deviation of the sound pressure level measurement value of 50 times in the 500 Hz band, and the standard deviation of the sound pressure level measurement value of 50 times in the 630 Hz band, with a test piece with slit and without slit. It is a chart compared with the test body of.

As is clear from the experimental results shown in FIGS. 9(a), (b), and FIGS. 10(a), (b), with the slit, the sound pressure was 50 times in almost all bands compared with the case without the slit. It can be seen that the variation (standard deviation) of the level measurement values is small.
For example, as can be seen from FIG. 9, the standard deviation of the sound pressure level measurement value in the 250 Hz band is 0.9 when the slit is provided, while it is 1.8 when the slit is not provided.
Further, the standard deviation of the sound pressure level measurement value in the 1.6 kHz band is 2.1 with the slit, whereas it is 2.8 without the slit.
Further, as can be seen from FIG. 10, the standard deviation of the sound pressure level measured value in the 500 Hz band is 1.3 with the slits, whereas it is 3.9 without the slits.
Further, the standard deviation of the sound pressure level measurement value in the 630 Hz band is 1.4 when the slit is provided, whereas it is 4.0 when the slit is not provided.

As is clear from the experimental results, the test piece with the slit, that is, the ventilation port terminal member 1 of the first embodiment has a small standard deviation (variation) of the sound pressure level measurement value and a high value as compared with the test piece without the slit. It was found to be a quality ventilation port end member.

That is, according to the ventilation port terminal member 1 of the first embodiment, a configuration in which the through hole (slit) X is provided in a portion of the elastic support 4 that is not in contact with the top plate 32 and the water drop receiving plate 5 of the hood portion 3, Therefore, it was found that a high-quality ventilation port terminal member capable of reducing the variation in the sound pressure level at the time of collision of a water drop falling on the water drop receiving plate 5 can be obtained.

Further, according to the ventilation port terminal member 1 according to the first embodiment, the primary natural frequency f _{0 of the} vibration isolator constituted by the water drop receiving plate 5 and the elastic support body 4 is 16 Hz or more in the octave band and 125 Hz or less. Since it is set to be the frequency of, the effect of reducing the sound in the middle and high frequency bands at the time of a water drop drop collision is improved, the A characteristic sound pressure level at the time of a water drop drop collision can be further reduced, and the water drop drop collision sound can be reduced. It is possible to obtain the ventilation port terminal member 1 having an excellent effect.

Embodiment 2
As shown in FIG. 11, in the ventilation port terminal member 1 according to the second embodiment, the elastic support body 4 is configured by a leaf spring 60 as a spring, and the leaf spring 60 corresponds to the central plate portion 51 of the water drop receiving plate 5. The central plate portion 62 which is in contact with the lower surface 51u and is connected to the central side of the central plate portion 51, and the left and right ends of the central plate portion 62 are respectively orthogonal to the lower surface 51u of the central plate portion 51 to the top plate 32. Left and right falling plate portions 63, 63 extending in the approaching direction, and left and right inclined plate portions 64, 64 extending downwardly and inclining in opposite directions from the lower ends of the left and right falling plate portions 63, 63, respectively. A shape having both left and right end plate portions 61, 61 extending in opposite directions from the lower ends of the inclined plate portions 64, 64 and contacting the upper surface of the top plate 32 and connected to the top plate 32. Was used. That is, the leaf spring 60 described in the ventilation port terminal member 1 of the first embodiment is used upside down.

In the ventilation port terminal member 1 of the second embodiment, for example, as shown in FIG. 11, both left and right end plate portions 61, 61 of the leaf 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 drop receiving plate 5 located above the left and right end plate portions 61, 61 of the plate spring 60 connected to the top plate 32 are 1 The bolts 41 and the nuts 42 of a set or more are connected to each other.
In addition, 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 central plate portion 62 and the nut 42.

Then, in the ventilation port terminal member 1 according to the second embodiment, the through hole X is formed in the entire area of the left falling plate portion 63 and the inclined plate portion 64 along the extension direction of the leaf spring 60, as in the first embodiment. A left through hole X extending over the entire length and a right through hole X extending over the entire area of the right falling plate portion 63 and the inclined plate portion 64 along the extension direction of the leaf spring 60. The primary natural frequency f ₀ of the vibration isolator composed of the spring 60 and the water drop receiving plate 5 is set to a frequency of 16 Hz or more in the octave band and 125 Hz or less, and more preferably 63 Hz in the 16 Hz or more of the octave band. The frequency was set as follows.

Embodiment 3
As shown in FIG. 12, in the ventilation port terminal member 1 of the third embodiment, the elastic support body 4 is configured by a plurality of leaf springs 60A and 60B as springs, and the plurality of leaf springs 60A and 60B and the water drop receiving plate. The primary natural frequency f ₀ of the vibration isolator composed of 5 and 5 is set to a frequency of 16 Hz or higher in the octave band and 125 Hz or lower, and more preferably 16 Hz or higher in the octave band and 63 Hz or lower. Set to.

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

In the ventilation port terminal member 1 of the third embodiment, for example, as shown in FIG. 12, the left and right end plate portions 61A and 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, 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 central plate portion 51 of the water drop receiving plate 5 by bolts 41 and nuts 42, and the left and right sides of the one leaf spring 60A are connected. It is located below both end plate parts 61A and 61A, and is located below the center part of the curved plate part 62A of one plate spring 60A and the left and right end plate parts 61B and 61B of the other plate spring 60B. The center of the curved plate portion 62B of the other leaf spring 60B is connected by the bolt 41 and the nut 42.
The through holes X are provided, for example, on the left and right sides of the curved plate portion 62A of the one leaf spring 60A and on the left and right sides of the curved plate portion 62B of the other leaf spring 60B.
In addition, 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 curved plate portion 62A of the one leaf spring 60A and the nut 42. For example, a plain washer 43 and a spring washer 44 are installed between the flat washer 42 and the spring 42.

Embodiment 4
As shown in FIG. 13, in the ventilation port terminal member 1 of the fourth embodiment, the elastic support body 4 is configured by the rubber 70 and the leaf spring 60 of the first embodiment (see FIG. 6). 70 and the water drop receiving plate 5 so that the primary natural frequency f ₀ of the vibration proof body is 16 Hz or higher in the octave band and 125 Hz or lower, and more preferably 16 Hz or higher in the octave band and 63 Hz or lower. The frequency was set to.
Similar to the first embodiment, the through hole X includes, for example, a left through hole X extending along the extension direction of the leaf spring 60 over the entire area of the left rising plate portion 63 and the inclined plate portion 64, and a leaf spring. The right through-hole X is formed by extending the right rising plate portion 63 and the inclined plate portion 64 along the extension direction of 60.

In the ventilation port terminal member 1 of the fourth embodiment, as shown in FIG. 13, for example, the central plate portion 62 of the leaf 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. , The left and right end plate portions 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 drop receiving plate 5. Is connected by a bolt 41 and a nut 42.
A flat washer 43 and a spring washer 44 are installed between the lower surface of the end plate portion 61 and the nut 42, for example.

The rubber connecting portion 7 between the central plate portion 62 of the leaf spring 60 and the top plate 32 of the hood portion 3 is specifically configured as follows.
The central plate portion 62 of the leaf spring 60 has a bolt through hole through which the bolt 41 penetrates.
Further, the rubber 70 has a cylindrical shape in which a mounting hole 73 for mounting the metal cylinder 45 is formed in the center, and a ring-shaped groove 71 is formed on the outer peripheral surface to encircle the outer peripheral surface. Is.
Further, in the top plate 32 of the hood portion 3, a fitting through hole 72 into which the cylindrical rubber 70 is fitted is formed at a position where the central plate portion 62 of the leaf 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 has a ring-shaped groove 71 of the cylindrical rubber 70. The rubber 70 is attached to the fitting through hole 72 so that the rubber 70 is fitted into the fitting through hole 72.
Then, 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. It is installed on one end surface of the rubber 70 projecting upward from the upper surface of 32, and 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 so that the tip side of the bolt 41 is raised. The rubber 70 protruding downward from the lower surface of the plate 32 is caused to protrude downward from the other end surface.
Then, the nut 42 is fastened to the tip end side of the bolt 41 protruding downward from the other end surface of the rubber 70, for example, via the flat washer 43 and the spring washer 44, so that the central plate portion 62 of the leaf spring 60 and the top plate. A rubber connecting portion 7 having a structure in which 32 and 32 are connected via a rubber 70 by a bolt 41 and a nut 42 is configured.
Note that, as shown in FIG. 13, one or more sets of rubber connecting portions 7 that connect the central plate portion 62 of the leaf spring 60 and the top plate 32 are provided.

Further, although not shown, in the fourth embodiment, the elastic support body 4 is configured such that at least one of the end plate portion 61 side and the central plate portion 62 of the leaf spring 60 is connected by the rubber connecting portion 7. Good. For example, in the elastic support body 4 according to the fourth embodiment, the left and right end plate portions 61, 61 of the leaf spring 60 are connected to the water drop receiving plate 5 via the rubber connecting portion 7, and the central plate portion of the leaf spring 60 is connected. The configuration may be such that 62 is connected to the top plate 32 via the rubber connecting portion 7.

That is, as shown in FIG. 13, the ventilation port terminal member 1 of the fourth embodiment is the same as the leaf spring 60 of the first embodiment, and the center plate portion 62 of the leaf spring 60 and the center of the top plate 32 are used. The connecting portion with the side is constituted by one or more sets of rubber connecting portions 7.
Note that the configuration of the parts not particularly described in FIG. 13 is the same as that of the first embodiment (FIG. 6).

Embodiment 5
As shown in FIG. 14, the ventilation port terminal member 1 of the fifth embodiment has the same elastic support 4 as the leaf spring 60 shown in the first embodiment (see FIG. 6) or the fourth embodiment (see FIG. 13). Of the vibration isolator formed by the rubber plate 600 as a rubber having a spring function and having a spring shape, and the rubber plate 600 and the water drop receiving plate 5 have a primary natural frequency f ₀ of 16 Hz of the octave band. The frequency is set to 125 Hz or less, and more preferably set to 16 Hz or more and 63 Hz or less in the octave band.

The rubber plate 600 extends from the left and right ends of the center plate 602 connected to the top plate 32 of the hood part 3 in a direction orthogonal to the top plate 32 and close to the water drop receiving plate 5. From the upper ends of the left and right rising plate portions 603 and 603, the left and right rising plate portions 603 and 603, and the left and right inclined plate portions 604 and 604, which rise and extend in mutually opposite directions, respectively. A shape having a pair of left and right end plate portions 601 and 601 connected to the water drop receiving plate 5 respectively extending in opposite directions was used.

That is, in the ventilation port terminal member 1 of the fifth embodiment, as shown in FIG. 14, the left and right end plate portions 601 and 601 of the rubber plate 600 are attached to the left and right sides of the central plate portion 51 of the water drop receiving plate 5 by the bolts 41 and The central plate portion 602, which is connected to the central plate portion 51 and is located below the left and right end plate portions 601 and 601, which are connected to the right and left sides of the central plate portion 51, has a bolt 41 and a nut on the central side of the top plate 32. It is configured to be connected by 42.
In addition, 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 601 and the nut 42.
Similar to the first embodiment, the through hole X includes, for example, a left through hole X extending along the extension direction of the rubber plate 600 over the entire area of the left rising plate portion 603 and the inclined plate portion 604, and a rubber plate. The right through-hole X extends along the extension direction of 600 over the entire area of the right rising plate portion 603 and the inclined plate portion 604.

According to the ventilation port terminal member 1 of each of the second to fifth embodiments, the elastic support body 4 is formed of a spring (a leaf spring 60, a combination of the leaf springs 60A and 60B, a coil spring 60C), or a spring and a rubber. 70 or a rubber plate (rubber) 600, and the primary natural frequency f ₀ of the vibration isolator composed of the elastic support 4 and the water drop receiving plate 5 is set to 16 Hz or more in the octave band and 125 Hz or less. Since the frequency is set so that the frequency is more preferably 16 Hz or more and 63 Hz or less in the octave band, the sound pressure level at the time of water drop collision is similar to that of the ventilation port terminal member 1 of the first embodiment. It becomes a high-quality ventilation end member that can reduce the standard deviation (variation), and can also reduce the A-weighted sound pressure level at the time of a water drop collision, making it a ventilation terminal member that has an excellent effect of reducing the water drop collision sound. ..

That is, according to the ventilation port end member 1 of each of the first to fifth embodiments, the vibration transmissibility is 1 or less in the vibration isolation region in the frequency band higher than the frequency corresponding to √2 times the primary natural frequency f ₀ . The vibration transmission from the water drop receiving plate 5 to the hood part 3 is suppressed, and the propagation of the vibration energy generated by the drop collision of the water drops to the hood part 3 can be suppressed.

Further, the frequency band around the primary natural frequency f ₀ is a vibration amplification region, and by adopting the structure of the vibration isolator shown in each of the first to fifth embodiments, the primary natural vibration of the vibration isolator is obtained. Although the amplification factor of the resonance point of the number f ₀ is large, the frequency band in the vicinity of the primary natural frequency f ₀ is a region in which the correction amount in the frequency correction A characteristic is large, and therefore the sound pressure level felt by a person is low. It becomes a value.

Further, like the ventilation port terminal member 1 shown in the fourth embodiment (see FIG. 13), in the case where the elastic support body 4 is provided with the rubber connecting portion 7, the damping effect of the rubber 70 of the rubber connecting portion 7 is obtained. As a result, the effect of reducing the amplification factor of the resonance point of the vibration isolator is added, so that it is possible to obtain the ventilation port terminal member 1 in which the adverse effect of the resonance point is suppressed and the effect of reducing the sound of water droplet drop collision is improved.

Further, according to the ventilation port terminal member 1 according to the fifth embodiment (see FIG. 14 ), since the elastic support body 4 is configured by the rubber plate 600 formed to have a spring function, the damping effect of rubber is obtained. Since it can be provided, the effect of lowering the amplification factor of the resonance point of the vibration isolator is given, and the ventilation port terminal member 1 can be obtained in which the adverse effect of the resonance point is suppressed and the effect of reducing the water drop collision sound is improved. it 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 drop receiving plate 5 of the ventilation port terminal member 1 described above project outward from the outer wall surface 93, and The water drop receiving plates 5, 5 of the ventilation port terminal members 1, 1 provided on the outer wall 91 of the floor construct the building 90 positioned on the vertical line V, thereby forming the ventilation port terminal of the upper floor. It is possible to reduce variations in the sound pressure level of the water drop collision sound that occurs when the water droplet W drops from the member 1 and collides with the water drop receiving plate 5 of the ventilation port terminal member 1 on the lower floor, and the effect of reducing the water drop collision sound is reduced. An excellent building 90 can be provided.

The overall shape of the ventilation port terminal member 1 may be round.
Further, the shapes of the top plate 32 and the water drop receiving plate 5 of the hood portion 3 of the ventilation port terminal member 1 do not have to be rectangular.
Further, the ventilation port terminal member 1 may have a configuration in which the opening is provided not only on the lower portion of the hood portion 3 but also on the side surface and the front surface of the hood portion 3. Further, the opening may be covered with a net.

Further, the ventilation port terminal member 1 may be configured so as to be directly attached to the outer wall without including the tubular portion 2.

Further, the connection between the water drop receiving plate 5 and the elastic support 4 and the connection between the elastic support 4 and the top plate 32 do not have to be connection by bolts and nuts. For example, it may be configured to be connected by welding, an adhesive, or the like.

The through holes X are evenly provided in the front, rear, left and right of the elastic support 4 in a portion of the hood 3 that is not in contact with the top plate 32 and the water drop receiving plate 5, for example, with the center of the elastic support 4 as a reference. The number, shape, etc. are not particularly limited.
For example, in the through hole X, a plurality of long holes (slits) extending along the extension direction of the plate-shaped elastic support body 4 are arranged at predetermined intervals along the plate width direction of the plate-like elastic support body 4. Or a plurality of elongated holes (slits) extending along the plate width direction of the plate-like elastic support body 4 at predetermined intervals along the extension direction of the plate-like elastic support body 4. A structure in which the holes are arranged side by side, or a plurality of individual holes such as circular holes and rectangular holes are formed at predetermined intervals along the extension direction of the plate-shaped elastic support 4, A plurality of individual holes such as holes and rectangular holes may be randomly formed in the plate-shaped elastic support 4 like punching metal.

Further, in each of the embodiments, the primary natural frequency f _{0 of the} vibration isolator including the water drop receiving plate 5 and the elastic support 4 is set to be a frequency of 16 Hz or higher and 125 Hz or lower in the octave band. Although an example is shown, the primary natural frequency f _{0 of the} vibration isolator constituted by the water drop receiving plate 5 and the elastic support 4 is not set to be a frequency of 16 Hz or higher and 125 Hz or lower in the octave band. May be. For example, the primary natural frequency f _{0 of the} vibration isolator is set to be a frequency slightly lower than 16 Hz of the octave band, or the primary natural frequency f ₀ of the vibration isolator is set to the octave band. The frequency may be set to be slightly higher than 125 Hz.

1 ventilation port terminal member, 3 hood part, 4 elastic support, 5 water drop receiving plate,
32 Hood top plate, 90 building, 91 outer wall, 92 ventilation hole, 93 outer wall surface,
X through hole.

Claims (4)

A ventilation port terminal member attached to a ventilation hole formed on an outer wall of a building,
A hood portion protruding from the outer wall surface of the building to the outside of the building, and a water drop receiving plate provided on the top plate of the hood portion via a plate-shaped elastic support,
A ventilation port terminal member, wherein a through hole is provided in a portion of the elastic support member that is not in contact with the top plate and the water drop receiving plate of the hood portion. The primary natural frequency f _{0 of the} vibration isolator constituted by the water drop receiving plate and the elastic support is set to be a frequency of 16 Hz or more and 125 Hz or less in the octave band. Ventilation port terminal member described. The elastic support is a plate material whose center side is attached to the top plate of the hood part and both end sides are attached to the water drop receiving plate, or the center side is attached to the water drop receiving plate and both ends are the top of the hood part. It is composed of plate material attached to the plate,
The through hole is formed by a long hole extending along the extension direction of the plate in a portion between the center side and the end side of the elastic support body. Ventilation port terminal member. A building in which the ventilation port terminal member is provided on the outer wall so that the hood portion and the water drop receiving plate of the ventilation port terminal member according to any one of claims 1 to 3 project outward from the outer wall surface. And
A building characterized in that each water drop 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.

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