JP2020038031A - Ventilation hole terminal member and building - Google Patents

Abstract

To provide a ventilation hole terminal member, etc. that have improved an effect to reduce the sound of middle and high frequency bandwidths when waterdrops fall and collide.SOLUTION: A ventilation hole terminal member is attached to a ventilation hole formed in an outer wall of a building, and includes a hood part 3 protruding from an outer wall surface of the building to the outside of the building, and a waterdrop receiving plate 5 provided on a top plate 32 of the hood part 3 through an elastic support body 4. A primary natural frequency fof a vibration proofing body composed of the waterdrop receiving plate 5 and the elastic support body 4 is set to be a frequency of 16 Hz or higher and 125 Hz or lower in an octave band.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ventilation port terminal member and the like provided with a structure capable of reducing propagation of a water drop impact sound into a living room.

In buildings such as multi-family dwellings, hotels, office buildings, etc., installation of ventilation equipment is obligatory. As the ventilation equipment, a ventilation opening is often installed in a living room, and a ventilation opening 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 respectively attached to the ventilation holes of the outer walls of the upper and lower floors of the building such that the hood portion protrudes outside the outer wall surface, and the respective ventilation port terminal members of the upper and lower floors are positioned on a vertical line. Often.
In the building, when water drops fall from the terminal member on the upper floor and collide with the top plate of the hood part of the terminal member on the lower floor after rainfall, a water drop falling sound is generated. Then, the water drop impact sound propagates into the living room as solid sound.
As a vent opening terminal member which has taken measures to reduce the water drop impact sound, for example, one having a structure in which a water drop receiving plate is provided on a top plate of a hood via an elastic support member is known ( Patent Document 1).

Japanese Patent No. 5258712

However, in the ventilation port terminal member disclosed in Patent Literature 1, the elastic support is configured by the support plate and the elastic member. Since the support plate of the elastic support has a plate thickness of about 1 mm, it has high rigidity, and the elastic member is rubber. Therefore, the primary natural frequency f _{0 of the} vibration isolator composed of the elastic support and the water drop receiving plate is provided. Therefore, there is a problem that the effect of reducing the sound in the middle and high frequency bands at the time of the above-mentioned water drop falling collision is not sufficient.
SUMMARY OF THE INVENTION The present invention provides a vent port terminal member and the like having an improved effect of reducing sound in a middle and high frequency band at the time of a water drop falling collision.

The ventilation port terminal member according to the present invention is a ventilation port terminal member attached to a ventilation hole formed on an outer wall of a building, a hood portion projecting outside 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 on an elastic support via an elastic support, and a primary natural frequency f _{0 of the} vibration isolator formed of the water drop receiving plate and the elastic support is 125 Hz in an octave band of 16 Hz or more. The frequency is set to be as follows.
Further, the elastic support is a leaf spring. A vent terminal member according to claim 1.
Further, the elastic support is a coil spring.
According to the ventilation port terminal member configured as described above, it is possible to obtain a ventilation port terminal member having an improved effect of reducing the sound in the middle and high frequency bands at the time of a water drop falling collision.
Further, the elastic support is made of rubber.
Further, the elastic support is constituted by a spring and rubber.
According to the ventilation port terminal member configured as described above, the effect of reducing the amplification factor of the resonance point of the vibration isolator is provided by the damping effect of the rubber, so that the adverse effect of the resonance point is suppressed and water droplets are suppressed. It is possible to obtain a ventilation port terminal member having an improved effect of reducing a falling collision sound.
Further, by setting the thickness of the water drop receiving plate to 0.5 mm to 5 mm, the primary natural frequency f _{0 of the} vibration isolator formed of the water drop receiving plate and the elastic support is 125 Hz at 16 Hz or more of the octave band. Since it is characterized by being set to have the following frequencies, the vibration isolator can be realized as a structure, and the sound in the middle and high frequency band at the time of a water drop falling collision can be reduced. A mouth end member can be obtained.
Further, the building according to the present invention is a building in which the ventilation port terminal member is provided on the outer wall such that the hood portion and the water drop receiving plate of any of the above-described ventilation port terminal members project outside the outer wall surface. Since the 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 located on a vertical line, water drops fall from the upper floor ventilation port terminal member and the lower floor ventilation port It is possible to provide a building that is excellent in the effect of reducing the sound of a water drop falling when it collides with the water drop receiving plate of the terminal member.

FIG. 3 is a perspective view of a vent opening terminal member viewed from the front side (first embodiment). The perspective view which looked at the ventilation-port terminal member from the back side (first embodiment). FIG. 3 is a front view of a vent terminal member (first embodiment). The rear view of a ventilation port terminal member (Embodiment 1). The figure which shows the state which a water drop falls 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 an elastic support (Embodiment 1). Sectional drawing which shows the structure of an elastic support (Embodiment 2). Sectional drawing which shows the structure of an elastic support (Embodiment 3). Sectional drawing which shows the structure of an elastic support (Embodiment 4). Sectional drawing which shows the structure of an elastic support (Embodiment 5). Sectional drawing which shows the structure of an elastic support (Embodiment 6). Sectional drawing which shows the structure of an elastic support (Embodiment 7). Sectional drawing which shows the structure of an elastic support (Embodiment 8). Sectional drawing which shows the structure of an elastic support (Embodiment 9). The figure which shows the FFT analysis result of the water drop falling collision sound in each test body. It is a figure which shows the measurement result of the water droplet falling collision sound in each test body, (a) is a numerical table, (b) is a comparison graph.

Embodiment 1
As shown in FIGS. 1 to 6, the ventilation terminal member 1 according to the first embodiment includes 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. A hood portion 3 protruding outward from an outer wall surface 93 of the building 90; and a water droplet receiving plate 5 provided on a top plate 32 of the hood portion 3 with an elastic support 4 interposed therebetween. The primary natural frequency f _{0 of the} vibration isolator composed of the elastic support 4 and the elastic support 4 is set to be a frequency of 16 Hz or more and 125 Hz or less in the octave band.
The cylindrical part 2, the hood part 3, and the water drop receiving plate 5 of the terminal member for ventilation 1 are formed of, for example, a metal plate.

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 ventilation hole that is formed in a box shape, is formed in an outdoor ventilation hole 36 (see FIG. 1) having an open lower portion, and has a square plate that forms the rear plate 35 and has a central opening. One end of the cylindrical portion 2 is connected to the edge of the indoor-side ventilation hole 37. That is, the configuration is such that the tubular portion 2 is connected to the rear plate 35 of the hood portion 3 and extends rearward of the rear plate 35. The cylindrical part 2 is formed in a cylindrical part, for example.
That is, the hood portion 3 is configured such that the ventilation port terminal member 1 is attached to the ventilation hole 92, so that the lower side outside ventilation hole 36 and the lower room outside ventilation hole 37 allow the hood portion 3 to extend from the inside of the building 90 to the outside of the building 90. 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 holes 36 and the indoor-side ventilation holes 37 is formed in the gallery 38 (see FIG. 1).

  In other words, the hood portion 3 includes a square 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 a square of the rear plate 35. A top plate 32 connecting the upper side, a left side plate 33 connecting a left side of the square extending below one end of the upper side of the square of the front plate 31 and a left side extending below one end of the upper side of the square of the rear plate 35, A ventilation plate terminal member, comprising a right side plate connecting the right side of the square extending below the other end of the upper side of the square of the front plate 31 and the right side extending below the other end of the upper side of the square of the rear plate 35; 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 connected to the outside through the lower outdoor ventilation hole 36. So that it communicates with the room through the room-side ventilation hole 37 of the rear plate 35. It has been made.

That is, in the ventilation port terminal member 1, the cylindrical portion 2 is inserted into the ventilation hole 92 formed in the outer wall 91 of the building 90 from the other end side of the cylindrical portion 2, and the rear surface 35 a of the rear plate 35 of the hood portion 3 is attached to the building. 90, the top plate 32 is located above, the left side plate 33 is located on the left side, and the right side plate 34 is located on the right side.
Note that, for example, a leaf spring (not shown) 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. As a result, the ventilation port terminal member 1 is fixed to the ventilation hole 92, and in the fixed state, a sealing material is provided in a gap between the upper edge, the left edge, the right edge, and the outer wall surface 93 of the rear plate 35 of the hood portion 3. And the like, the ventilation port terminal member 1 is attached to the ventilation hole 92.

Further, the lower end of the rear plate 35 of the hood 3 is a drainer that receives water flowing along the plate surface of the hood 35 and flows the received water to a front side of the outer wall 93 away from the outer wall 93. A part 39 is provided.
The draining portion 39 is, for example, 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 protrudes from left and right side edges at the lower end side of the back plate 39a. The protruding pieces 39b, 39b, the inclined piece 39c that is inclined downward and forward from the lower end of the back plate 39a and the lower ends of the left and right protruding pieces 39b, 39b, and rises above the left and right side edges of the inclined piece 39c. The left and right regulating pieces 39d, 39d are provided.
Since the water draining section 39 is provided, water drops flowing along the plate surface of the hood section 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 drops fall on the water drop receiving plate 5 of the mouth end member 1, water drops can be prevented from flowing down the outer wall surface 93 and water marks can be prevented from being formed on the outer wall surface 93.

The water drop receiving plate 5 provided on the top plate 32 of the hood unit 3 via the elastic support 4 is configured by a roof-shaped plate material arranged so as to cover above the top plate 32 of the hood unit 3. .
As shown in FIG. 1, for example, the upper surface of the water drop receiving plate 5 is formed in a roof shape in which the top of the ridge has a similar rectangular flat surface slightly smaller than the rectangular shape of the top plate 32 of the hood 3. Is 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 the plate surface is in a predetermined shape with the plate surface of the top plate 32 of the hood portion 3. A central plate portion 51 arranged so as to face in parallel at an interval, and each of the rectangular edges constituting the central plate portion 51 approach respective rectangular edges of the top plate 32 of the corresponding hood portion 3. , And peripheral plate portions 52, 52,... Formed by inclined plates that are inclined as described above.
The water drop receiving plate 5 has a rectangular center 5C constituting the central plate portion 51 on a vertical line V passing through the rectangular center of the top plate 32 orthogonally to the plate surface of the top plate 32 of the hood portion 3. 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. 5, on the outer walls 91, 91 of the upper and lower floors, each of the ventilation port terminal members 1, 1 such that the hood portion 3 and the water drop receiving plate 5 of the ventilation port terminal member 1 protrude outside the outer wall surface 93. 1 is provided, and a center 90 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 to the draining portion 39 along the plate surface of the hood portion 3 of the ventilation port terminal member 1 attached to the upper floor is passed through the front end of the inclined piece 39c of the draining portion 39 to the lower floor. Falls on the water drop receiving plate 5 of the ventilation port terminal member 1 attached to the air outlet.

Therefore, in the ventilation port terminal member 1 of the first embodiment, the water drop receiving plate 5 is provided on the top plate 32 of the hood portion 3 via the elastic support 4, and the water drop receiving plate 5 and the elastic support 4 are provided. By setting the primary natural frequency f ₀ of the vibration insulator to be a frequency of not less than 125 Hz and not less than 16 Hz in the octave band, The sound in the middle and high frequency band in the sound of a water drop falling when a water drop falls is reduced.

As shown in FIG. 6, in the ventilation port terminal member 1 of the first embodiment, the elastic support 4 is configured by a leaf spring 60 as a spring, and the vibration isolator is configured by the leaf spring 60 and the water drop receiving plate 5. The primary natural frequency f ₀ of the body was set so as to be a frequency of 125 Hz or less in the octave band of 16 Hz or more, and more preferably to a frequency of 63 Hz or less in the octave band of 16 Hz or more.

  The leaf spring 60 has a surface parallel to the lower surface of the central plate portion 51 of the water droplet receiving plate 5 and is connected to the central plate portion 51, and from both left and right ends of the central plate portion 62 Each of the left and right falling plate portions 63, 63 extending in a direction approaching the top plate 32 at right angles to the lower surface of the central plate portion 51, and descending in opposite directions from the lower ends of the left and right falling plate portions 63, 63, respectively. The left and right inclined plate portions 64, 64 extending from the lower ends of the respective inclined plate portions 64, 64 and extending in opposite directions to be parallel to the top plate 32 and connected to the top plate 32. A shape having both end plate portions 61 and 61 was used.

In the ventilation port terminal member 1 of the first embodiment, for example, as shown in FIG. 6, both left and right end plate portions 61, 61 of a leaf spring 60 are connected to a 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 plate spring 60 located above the left and right end plate portions 61, 61 of the plate spring 60 connected to the top plate 32 and the central plate portion 51 of the water droplet receiving plate 5 It was configured to be connected by more than one set of bolts 41 and nuts 42.
A flat washer 43 and a spring washer 44 are provided 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, for example.

Embodiment 2
As shown in FIG. 7, in the ventilation port terminal member 1 according to the second embodiment, the elastic support 4 is constituted 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. 5 so that the primary natural frequency f ₀ of the vibration isolator becomes a frequency of 125 Hz or less in the octave band of 16 Hz or more, and more preferably a frequency of 63 Hz or less in the octave band of 16 Hz or more. Set to.

The leaf spring 60 </ b> A has a surface parallel to the upper surface of the top plate 32 and is connected to the top plate 32 so that both the left and right end plate portions 61 </ b> A, 61 </ b> A are connected to the left and right end plate portions 61 </ b> A, 61 </ b> A. A shape having a plate portion 62A was used.
Further, the leaf spring 60B has both left and right end plate portions 61B, 61B having a surface parallel to the lower surface of the central plate portion 51 of the water drop receiving plate 5 and connected to the central plate portion 51, and both left and right ends. The one having a shape provided with a curved plate portion 62B connecting the plate portions 61B, 61B was used.

7, 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, for example, as shown in FIG. At the same time, 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 ends of the one leaf spring 60A. The central portion of the curved plate portion 62A of one leaf spring 60A positioned above both end plate portions 61A, 61A and the lower portion of both the left and right end plate portions 61B, 61B of the other leaf spring 60B. The other plate spring 60B is configured to be connected to the center of the curved plate portion 62B by the bolt 41 and the nut 42.
The lower surface of the top plate 32 and the nut 42, the lower surface of the end plate portion 61B of the other leaf spring 60B and the nut 42, and the lower surface of the central portion of the curved plate portion 62A of the one leaf spring 60A and the nut For example, a flat washer 43 and a spring washer 44 are provided between the flat washer 42 and the spring washer 42.

Embodiment 3
As shown in FIG. 8, in the ventilation port terminal member 1 of the third embodiment, the elastic support 4 includes a coil spring (compression coil spring) 60 </ b> C as a spring and a support shaft 46. The primary natural frequency f ₀ of the vibration isolator constituted by the shaft 46 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, more preferably 63 Hz in the octave band of 16 Hz or more. The following frequencies were set.

  The coil spring 60C includes a left coil spring 60C disposed on the left end side of the central plate portion 51 of the water droplet receiving plate 5 and a right coil spring disposed on the right end portion of the central plate portion 51 of the water droplet receiving plate 5. 60C.

  As shown in FIG. 8, for example, as shown in FIG. 8, the one end 61 </ b> C side of the coil spring 60 </ b> C contacts the upper surface of the top plate 32 or is connected to the top plate 32. The other end 62 </ b> C side of the 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. 8, support shafts 46 are provided on the left and right sides of the lower surface of the central plate portion 51 of the water droplet receiving plate 5 so as to protrude from the lower surface. That is, the other end 46a of the support shaft 46 is attached to the lower surface of the center plate portion 51 of the water droplet receiving plate 5 by fixing means such as welding.
Further, in the top plate 32 of the hood portion 3, a shaft through hole 47 for allowing the support shaft 46 to pass therethrough is formed at a position where the one end 61C of the coil spring 60C is disposed.

  The ventilation port terminal member 1 according to the third embodiment is configured such that the support shaft 46 fixed to the lower surface of the center plate portion 51 of the water drop 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. One end 46b of the support shaft 46 is protruded downward from the lower surface of the top plate 32 through the shaft through hole 47 of the top plate 32, and the shaft stopper member 48 is attached to the one end 46b side of the support shaft 46. The other end 62 </ b> C of the spring 60 </ b> C is configured to contact the lower surface of the central plate portion 51 of the water drop receiving plate 5, and to maintain the state in which the one end 61 </ b> C of the coil spring 60 </ b> C contacts the upper surface of the top plate 32.

  In the third 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 drop receiving plate 5 by fixing means such as welding or bonding. The one end 61C and the upper surface of the top plate 32 may be connected by a fixing means such as welding or bonding.

Further, although not shown, in the third embodiment, the elastic support 4 does not include the support shaft 46, and for example, the other end 62C of the coil spring 60C and the lower surface of the central plate portion 51 of the water drop receiving plate 5 are welded. A configuration may be used in which the ends are connected by fixing means such as adhesion, and the 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, in the ventilation port terminal member 1 of the third embodiment, the elastic support 4 is constituted by a coil spring (compression coil spring) 60C as a spring, and the vibration isolator is constituted by the coil spring 60C and the water drop receiving plate 5. The primary natural frequency f ₀ may be set to be a frequency of 125 Hz or less in the octave band of 16 Hz or more, and more preferably to a frequency of 63 Hz or less in the octave band of 16 Hz or more.

Embodiment 4
As shown in FIG. 9, in the ventilation port terminal member 1 of the fourth embodiment, the elastic support 4 is formed of the same leaf spring 60 of the first embodiment (see FIG. 6). the primary natural frequency _{f 0} of the isolator composed of a plate 5, so that the frequencies below 125Hz above 16Hz octave band, more preferably, less than or equal to the frequency 63Hz above 16Hz octave band Was set as follows.

That is, as shown in FIG. 9, the same leaf spring as that of FIG. 6 is used as the leaf spring, and both the left and right end plate portions 61, 61 of the leaf spring 60 and the central plate portion 51 of the water droplet receiving plate 5 are used. The left and right sides are connected by bolts 41 and nuts 42, and the top plate and a center plate portion 62 located below both left and right end plate portions 61, 61 connected to the left and right sides of the center plate portion 51. 32 is connected to the center side by one or more bolts 41 and nuts 42.
A flat washer 43 and a spring washer 44 are provided 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, for example.

Embodiment 5
As shown in FIG. 10, in the ventilation port terminal member 1 of the fifth embodiment, the elastic support 4 is constituted by a leaf spring 60x as a spring and a rubber 70, and the leaf spring 60x, the rubber 70 and the water drop receiving plate 5 So that the primary natural frequency f ₀ of the vibration isolator is set to a frequency of 125 Hz or less in the octave band of 16 Hz or more, and more preferably a frequency of 63 Hz or less in the octave band of 16 Hz or more. Set.

  The leaf spring 60x has a surface parallel to the lower surface of the central plate portion 51 of the water drop receiving plate 5 and is connected to the central plate portion 51 and the central plate portion 62x, and from the left and right ends of the central plate portion 62x, respectively. The left and right falling plate portions 63x, 63x extending in a direction orthogonal to the central plate portion 51 and approaching the top plate 32, and the top plate extending from the lower ends of the left and right falling plate portions 63x, 63x in directions opposite to each other. A shape provided with both left and right end plate portions 61x, 61x having a surface parallel to the upper surface of 32 was used.

As shown in FIG. 10, for example, the extended end portions of the left and right end plate portions 61 x, 61 x of the leaf spring 60 x are attached to the top plate 32 with the bolt 41 and the nut via the rubber 70, as shown in FIG. The central plate portion 62x of the plate spring 60 and the central plate portion of the water droplet receiving plate 5 which are connected to the top plate 32 and are located above both left and right ends 61x, 61x of the plate spring 60x connected to the top plate 32. 51 are connected by one or more sets of bolts 41 and nuts 42.
Note that, for example, a flat washer 43 and a spring washer 44 are provided between the lower surface of the central plate portion 62x and the nut 42.

The rubber connecting portions 7, 7 between the extended end sides of the left and right end plate portions 61x, 61x of the leaf spring 60x and the top plate 32 of the hood portion 3 are specifically configured as follows.
Bolt through holes through which the bolts 41 pass are formed on the extended end sides of the left and right end plate portions 61x, 61x of the leaf spring 60x.
The rubber 70 has a cylindrical shape in which a mounting hole 73 for mounting the metal cylinder 45 is formed at the center, and a ring-shaped groove 71 is formed on the outer peripheral surface so as to go around the outer peripheral surface. It is.
Further, in the top plate 32 of the hood portion 3, fitting through holes into which the cylindrical rubber 70 is fitted are respectively provided at positions where the extended end portions of the left and right end plate portions 61x, 61x of the leaf spring 60x are connected. 72 are formed.

The metal cylinder 45 is mounted in advance 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 formed by the ring-shaped groove 71 of the cylindrical rubber 70. The rubber 70 is attached to the fitting through hole 72 so as to fit into the fitting hole 72.
Thereafter, the end plate of the leaf spring 60x is adjusted so that the bolt through hole formed on the extension end side of the end plate portion 61x of the leaf spring 60x and the cylinder hole of the metal cylinder 45 mounted inside the rubber 70 match. The portion 61x is installed on one end surface of the rubber 70 projecting upward from the upper surface of the top plate 32, and the bolt 41 is passed through the bolt through hole of the end plate portion 61x of the leaf spring 60x and the cylinder hole of the metal cylinder 45. Of the rubber 70 projecting below the lower surface of the top plate 32 downward.
Then, the nut 42 is fastened to the tip end 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, thereby extending the end plate 61x of the leaf spring 60x. The rubber connecting portion 7 has a structure in which the portion side and the top plate 32 are connected by a bolt 41 and a nut 42 via a rubber 70.

  Although not shown, in the fifth embodiment, the elastic support 4 has a configuration in which at least one of the end plate portion 61x side and the central plate portion 62x of the leaf spring 60x is connected by the rubber connection portion 7. I just need. For example, in the elastic support 4 of the fifth embodiment, the left and right end plate portions 61x, 61x of the leaf spring 60x are connected to the top plate 32 via the rubber connecting portion 7, and the central plate portion 62x of the leaf spring 60x. May be connected to the water drop receiving plate 5 via the rubber connecting portion 7.

Embodiment 6
As shown in FIG. 11, the ventilation port terminal member 1 of the sixth embodiment is configured such that the elastic support body 4 includes the plurality of leaf springs 60A and 60B and the rubbers 70 and 70 of the second embodiment (see FIG. 7). The primary natural frequency f ₀ of the vibration isolator constituted by the plurality of leaf springs 60A, 60B, the rubbers 70, 70, and the water drop receiving plate 5 is set to a frequency of 16 Hz or more and 125 Hz or less in the octave band. More preferably, the frequency is set so that the frequency is 16 Hz or more and 63 Hz or less in the octave band.

That is, as shown in FIG. 11, the same plurality of leaf springs 60A, 60B of the second embodiment are used as the plurality of leaf springs 60A, 60B, and both left and right end plate portions 61A, 61A, of one leaf spring 60A are used. The connecting portion between 61A and the top plate 32 was constituted by the rubber connecting portion 7.
The configuration of a portion not particularly described in FIG. 11 is the same as the configuration of the second embodiment (FIG. 7).

  In addition, although not shown, in Embodiment 6, the elastic support 4 is a connecting portion between the left and right end plate portions 61A, 61A of one leaf spring 60A and the top plate 32, and a left and right portion of the other leaf spring 60B. Of the connecting portions between the end plate portions 61B, 61B and the water drop receiving plate 5, and the connecting portion between the central portion of the curved plate portion 62A of one leaf spring 60A and the central portion of the curved plate portion 62B of the other leaf spring 60B. It is sufficient that at least one of the connecting portions is constituted by the rubber connecting portion 7.

Embodiment 7
As shown in FIG. 12, the ventilation port terminal member 1 of the seventh embodiment includes the elastic support 4 configured by the plurality of coil springs 60 </ b> C, 60 </ b> C and the rubbers 70, 70 of the third embodiment (see FIG. 8). The primary natural frequency f ₀ of the vibration isolator composed of the plurality of coil springs 60C, 60C, the rubbers 70, 70 and the water drop receiving plate 5 is set to a frequency of not less than 125 Hz and not less than 16 Hz in the octave band. More preferably, the frequency is set so that the frequency is 16 Hz or more and 63 Hz or less in the octave band.

That is, as shown in FIG. 12, the ventilation port terminal member 1 of the seventh embodiment uses the same plurality of coil springs 60C, 60C as in the third embodiment, and the rubber member having the metal cylinder 45 mounted in the mounting hole 73. 70 is provided with a rubber connecting portion 7A provided between one end 61C of the coil spring 60C and the shaft stopper 48.
The configuration of the portion not particularly described in FIG. 12 is the same as the configuration of the third embodiment (FIG. 8).
Note that the one end 61C of the coil spring 60C and the water drop receiving plate 5 may be connected using the rubber connecting portion 7A.
That is, although not shown, in the seventh embodiment, the elastic support member 4 includes a connecting portion between the one end 61C of the coil spring 60C and the top plate 32 and a connecting portion between the one end 61C of the coil spring 60C and the water droplet receiving plate 5. It is sufficient that at least one of the connecting portions is constituted by the rubber connecting portion 7A.

Embodiment 8
As shown in FIG. 13, in the ventilation port terminal member 1 of the eighth embodiment, the elastic support 4 is configured by the leaf spring 60 and the rubbers 70 and 70 of the fourth embodiment (see FIG. 9). The primary natural frequency f ₀ of the vibration isolator composed of the rubber 70, the rubber 70, 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, more preferably 16 Hz in the octave band. The frequency was set so as to be 63 Hz or less.

That is, as shown in FIG. 13, the ventilation port terminal member 1 of the eighth embodiment uses the same leaf spring 60 of the fourth embodiment, and the center plate portion 62 of the leaf spring 60 and the center of the top plate 32. The connection part with the side was constituted by one or more rubber connection parts 7.
The configuration of the portion not particularly described in FIG. 13 is the same as the configuration of the fourth embodiment (FIG. 9).

  In the eighth embodiment, the elastic support 4 is formed of a connecting portion between the central plate portion 62 of the plate spring 60C and the top plate 32 and a connecting portion between the end plate portion 61 of the plate spring 60C and the water droplet receiving plate 5. It is sufficient that at least one of the connecting portions is constituted by the rubber connecting portion 7.

Embodiment 9
As shown in FIG. 14, the ventilation port terminal member 1 of the ninth embodiment has the elastic support 4 similar to the leaf spring 60 shown in the fourth embodiment (see FIG. 9) or the eighth embodiment (see FIG. 13). A primary natural frequency f ₀ of a vibration isolator composed of the rubber plate 600 and the water drop receiving plate 5 is formed by a rubber plate 600 as a rubber having a spring function and having a octave band of 16 Hz. The frequency is set so as to be 125 Hz or less, and more preferably to be 63 Hz or less in the octave band of 16 Hz or more.

  The rubber plate 600 extends from the left and right end portions of the central plate portion 602 connected to the top plate 32 of the hood portion 3 to the direction approaching the water droplet receiving plate 5 at right angles to the top plate 32, respectively. Left and right rising plate portions 603, 603, left and right inclined plate portions 604, 604 extending upward from opposite ends of the left and right rising plate portions 603, 603, respectively, and extending from the upper ends of the respective inclined plate portions 604, 604. The one having the left and right end plate portions 601 and 601 which are respectively extended in opposite directions and connected to the water drop receiving plate 5 was used.

That is, as shown in FIG. 14, the left and right end plate portions 601 and 601 of the rubber plate 600 are provided with the bolt 41 and the bolt 41 on the left and right sides of the central plate portion 51 of the water droplet receiving plate 5, as shown in FIG. A central plate portion 602, which is connected by the nut 42 and located below the left and right end plate portions 601 and 601 connected to the left and right sides of the central plate portion 51, has a bolt 41 and a nut on the center side of the top plate 32. 42.
A flat washer 43 and a spring washer 44 are provided 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, for example.

  An experiment for confirming the effect of the ventilation port terminal member 1 of the present invention to reduce the impact of the water drop falling collision was performed as follows.

・ Experimental method An experiment was performed in a simple anechoic chamber to simulate the situation where water droplets fell on each test piece of the terminal member of the ventilation port attached to the air supply hole of the apartment house.
The experimental equipment is as follows.
At the bottom of the scaffold, a box with an inner diameter of 900 mm (a box whose inside is sound-absorbed with glass wool) is installed, and a test piece of the terminal member of the vent is installed outside the center of the front of the box, and a register (inside ventilation) is installed inside. Mouth) was installed. The register was a push type made of resin, and was in an "open" state during the experiment.
Assuming a common floor height of the apartment house, water drops were dropped from a position 3 m in height to the top end of the test member of the ventilation port terminal member using a dropper.
For the measurement of the water drop impact sound, a microphone was installed at the center position inside the box, and the maximum value of the A-weighted sound pressure level and the 1/3 octave band sound pressure level of the water drop impact sound was measured. The number of drops of the water droplet was set to 50 times for one specimen, and the average value of the data of 40 times with little external influence was used as the measured value.

-Specimen of vent terminal member The design value of the specimen of vent member used in the experiment is as follows.
(A) Conventional product: a ventilation port terminal member having a configuration in which the water drop receiving plate 5 is not provided on the top plate 32.
(B) Prior art document = Ventilation port terminal member having the configuration disclosed in Patent Document 1 (spring constant k of the vibration isolator: 248.8 N / mm, primary natural frequency f ₀ = 300 Hz of the vibration isolator).
(C) Application product = Ventilation port terminal member 1 of Embodiment 5 (see FIG. 10) (spring constant k of leaf spring 60 = 11.0 N / mm, primary natural frequency f _{0 of the} vibration isolator = 63 Hz).
In addition, the material, dimensions, etc. of the test body of each ventilation port terminal member are as follows.
Material of tube portion, hood portion, water drop receiving plate = stainless steel SUS304, diameter of tube portion = 97 mm, short side 43 mm, long side 150 mm of water drop receiving plate, plate thickness 1 mm of water drop receiving plate, mass m of water drop receiving plate = 70 g.

-Experimental results Fig. 15 shows the results of FFT analysis of the impact sound of water drops falling on the test specimens of the above-mentioned ventilation port terminal members, and Fig. 16 shows the measurement of 1/3 octave band center frequency-sound pressure level of each test specimen. The results are shown.
Comparing the conventional product and the prior art document product, it can be seen that the sound pressure level around 1000 Hz is reduced in the prior art document product.
Further, comparing the prior art document product and the application product, it can be seen that the sound pressure level of 100 Hz or more is significantly reduced in the application product. This indicates that, in the ventilation port terminal member 1 of the present invention, the vibration isolator works effectively and the transmission rate of vibration energy from the water droplet receiving plate 5 to the hood portion 3 is reduced.
The primary natural frequency of the vibration isolator of the application was set to an octave band of 63 Hz, and it is considered that a region of 89 Hz or more, which is √2 times this 63 Hz, became the vibration isolating region.
In addition, comparing the prior art document product and the application product in a region of 100 Hz or less, the application product has a higher sound pressure level, and the vicinity of 63 Hz which is the primary natural frequency is higher than that of the prior art document product. It can be seen that the vibration is amplified.
That is, in the application, it is considered that the vibration transmission amount in the high frequency band is reduced by setting the primary natural frequency f ₀ of the vibration isolator to the low frequency band.
Thus, according to the application, it has been found that the effect of reducing the sound in the middle and high frequency band in the sound of the water drop falling collision generated when the water drop W collides with the water drop receiving plate 5 is improved.

  Also, the A-weighted sound pressure level of the applied product is 30 dB or less, which indicates that the level is not a level that is anxious to humans.

ここで、
ｆ_０：一次固有振動数（Ｈｚ）
ｍ：水滴受板の質量（ｋｇ）
ｋ：ばね定数（Ｎ／ｍ） In addition, the primary natural frequency f ₀ of the vibration isolator constituted by the water drop receiving plate 5 and the elastic support 4 can be obtained by Expression (1).

here,
f ₀ : primary natural frequency (Hz)
m: Mass of water drop receiving plate (kg)
k: spring constant (N / m)

Generally, in order to lower the primary natural frequency f ₀ of the above-mentioned vibration isolator, the spring constant of the elastic support 4 may be reduced, but if the spring constant of the elastic support 4 is too small, the elastic support may be reduced. The body 4 becomes too soft, making it 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 and 63 Hz or less in an octave band) by increasing the mass of the water droplet receiving plate 5. .

That is, at the design stage, determines the target value of the primary natural frequency f ₀ of the isolator, as the primary natural frequency f ₀ of the isolator is the target value, based on the above equation (1) The mass m of the water drop receiving plate 5 and the spring constant k of the elastic support 4 are determined.

  Hereinafter, a combination of the mass m of the water droplet receiving plate 5 and the spring constant k of the elastic support member 4 when the diameter of the cylindrical portion 2 of the ventilation port terminal member 1 is changed will be exemplified. Here, a design example in which stainless steel SUS303 having a plate thickness of 1 mm and 2.5 mm is used as the water droplet receiving plate 5 is shown.

Design Example 1 = A case where the diameter of the cylindrical portion 2 is 75 mm, the short side of the water droplet receiving plate 5 is 33 mm, and the long side is 125 mm.
[1] When the thickness of the water drop receiving plate 5 is 1 mm.
(A) The target value of the primary natural frequency f ₀ of the vibration isolator = 30 Hz → the mass m of the water droplet receiving plate 5 = 51 g, and the spring constant k of the elastic support 4 = 1.8 N / mm.
(B) Target value of the primary natural frequency f ₀ of the vibration isolator = 40 Hz → mass m of the water drop receiving plate 5 = 51 g, and spring constant k of the elastic support 4 = 3.2 N / mm.
[2] The case where the thickness of the water drop receiving plate 5 is 2.5 mm.
(A) Target value of primary natural frequency f ₀ of vibration isolator = 30 Hz → mass m of water drop receiving plate 5 = 100 g, spring constant k of elastic support 4 = 3.6 N / mm.
(B) Target value of the primary natural frequency f ₀ of the vibration isolator = 40 Hz → mass m of the water drop receiving plate 5 = 100 g, spring constant k of the elastic support 4 = 6.4 N / mm.

Design Example 2 = The diameter of the cylindrical portion 2 is 100 mm, the short side of the water droplet receiving plate 5 is 43 mm, and the long side is 150 mm.
[1] When the thickness of the water drop receiving plate 5 is 1 mm.
(A) Target value of the primary natural frequency f ₀ of the vibration isolator = 30 Hz → mass m of the water drop receiving plate 5 = 70 g, and spring constant k of the elastic support 4 = 2.5 N / mm.
(B) Target value of the primary natural frequency f ₀ of the vibration isolator = 40 Hz → mass m of the water drop receiving plate 5 = 70 g, spring constant k of the elastic support 4 = 4.4 N / mm.
[2] The case where the thickness of the water drop receiving plate 5 is 2.5 mm.
(A) The target value of the primary natural frequency f ₀ of the vibration isolator = 30 Hz → the mass m of the water drop receiving plate 5 = 147 g, and the spring constant k of the elastic support 4 = 5.2 N / mm.
(B) Target value of the primary natural frequency f ₀ of the vibration isolator = 40 Hz → mass m of the water drop receiving plate 5 = 147 g, spring constant k of the elastic support 4 = 9.3 N / mm.

In the ventilation port terminal member 1 of each embodiment, the plate thickness of the water droplet receiving plate 5 is set to 0. By setting the width to 5 mm to 5 mm, 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 a frequency of 16 Hz or more and 125 Hz or less in the octave band. Preferably, the frequency is set to be not less than 63 Hz and not less than 16 Hz in the octave band.
For example, when the diameter of the cylindrical portion 2 is 75 mm, by setting the thickness of the water drop receiving plate 5 to 1 mm and the mass of the water drop receiving plate 5 to 50 g, the spring constant of the vibration isolator can be set to 0.8, and The primary natural frequency f ₀ of the vibration body can be designed to be 20 Hz in the octave band.
When the diameter of the cylindrical portion 2 is 150 mm, the spring constant of the vibration isolator can be set to 4.7 by setting the thickness of the water droplet receiving plate 5 to 3 mm and the mass of the water droplet receiving plate 5 to 300 g, thereby preventing the vibration. The primary natural frequency f ₀ of the vibration body can be designed to be 20 Hz in the octave band.

In addition, when adjusting the mass m of the water droplet receiving plate 5, when increasing the mass m of the water droplet receiving plate 5, for example, a weight having a desired mass m may be added to the water droplet receiving plate 5.
In this case, it is preferable that the weight or the like be added to the upper surface of the water drop receiving plate 5 located above the position where the elastic support 4 and the water drop receiving plate 5 are connected.

According to the ventilation port terminal member 1 of each of the first to ninth embodiments, the elastic support 4 is made of a spring (leaf spring 60, a combination of the leaf spring 60A and the leaf spring 60B, a coil spring 60C), or a spring and rubber. 7 or a rubber plate (rubber) 600, and the primary natural frequency f ₀ of the vibration isolator constituted by the elastic support 4 and the water drop receiving plate 5 is set to be not less than 16 Hz and not more than 125 Hz in the octave band. Since the frequency is more preferably set to a frequency of not less than 63 Hz and not less than 16 Hz of the octave band, the water drop W is generated when the water drop W collides with the water drop receiving plate 5. Sound can be reduced.

That is, according to the ventilation port terminal member 1 of each of the first to ninth embodiments, the vibration transmissibility is 1 or less in a frequency band higher than a frequency corresponding to √2 times the primary natural frequency f ₀ . In addition, the transmission of vibration 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 droplet to the hood portion 3 can be suppressed.

The frequency band around the primary natural frequency f ₀ is a vibration amplification region, and by adopting the structure of the vibration isolator described in each of Embodiments 1 to 9, the primary natural vibration of the vibration isolator can be achieved. Although the amplification factor at the resonance point of the number f ₀ becomes large, the frequency band near the primary natural frequency f ₀ is a region where the correction amount of the frequency correction A characteristic is large, so that the sound pressure level felt by a person is low. Value.

  Further, in the case of a configuration in which the elastic support 4 is provided with the rubber connecting portion 7 or the rubber connecting portion 7A as in the ventilation port terminal member 1 shown in the fifth to eighth embodiments (see FIGS. 10 to 13), The damping effect of the rubber 70 of the rubber connecting portions 7 and 7A has an effect of reducing the amplification factor of the resonance point of the vibration isolator, so that the adverse effect of the resonance point is suppressed and the effect of reducing the water drop impact sound is reduced. An improved vent terminal member 1 can be obtained.

  Further, according to the ventilation port terminal member 1 according to the ninth embodiment (see FIG. 14), since the elastic support 4 is constituted by the rubber plate 600 formed so as to have a spring function, the damping effect of the rubber is reduced. As a result, the effect of lowering the amplification factor of the resonance point of the vibration isolator is provided, and the ventilation port terminal member 1 having an improved effect of reducing the impact sound of the water drop falling while suppressing the adverse effect of the resonance point can be obtained. it can.

Further, according to the present invention, by setting the thickness of the water drop receiving plate 5 to 0.5 mm to 5 mm, the primary natural frequency f _{0 of the} vibration isolator constituted by the water drop receiving plate 5 and the elastic support 4 is provided. Is set to have a frequency of not less than 125 Hz and not less than 16 Hz in the octave band, so that the vibration isolator can be realized as a structure, and the sound in the mid-high frequency band at the time of a water drop falling collision can be reduced. Can be obtained.

  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 above-described ventilation port terminal member 1 protrude outside the outer wall surface 93. Each of the water drop receiving plates 5, 5,... Provided on the outer wall 91 of the floor constitutes a building 90 located on the vertical line V, thereby forming a terminal on the upper floor. It is possible to provide the building 90 which is excellent in the effect of reducing the sound of the water droplet falling collision generated when the water droplet W falls from the member 1 and collides with the water droplet receiving plate 5 of the ventilation port terminal member 1 on the lower floor.

  The shape of the leaf spring may be, for example, a Z-shape or a U-shape.

Further, a configuration using a plurality of leaf springs, coil springs, and rubber plates may be used.
For example, in the third embodiment and the seventh embodiment, the elastic support 4 may be configured by one or more coil springs 60C.
Further, the elastic support 4 may be configured using two or more of a leaf spring, a coil spring, and a rubber plate.

The overall shape of the ventilation terminal member 1 may be round.
Further, the shape of the top plate 32 and the water drop receiving plate 5 of the hood 3 of the ventilation terminal member 1 may not be rectangular.
Further, the ventilation terminal member 1 may have a configuration in which 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. Further, a configuration in which a net is stretched in the opening may be used.

  Further, the terminal member for ventilation 1 may be configured 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 need not be connected by bolts and nuts. For example, it may be configured to be connected by welding, an adhesive, or the like.

1 Ventilation port terminal member, 3 hood part, 4 elastic support, 5 water drop receiving plate, 7 rubber,
32 Hood top plate, 60, 60A, 60B leaf spring, 60C coil spring,
90 building, 91 outer wall, 92 ventilation hole, 93 outer wall, 600 rubber plate.

Claims (7)

A ventilation port terminal member attached to a ventilation hole formed on an outer wall of the building,
A hood portion protruding outside the building from the outer wall surface of the building, and a water drop receiving plate provided via an elastic support on a top plate of the hood portion,
A vent opening terminal member characterized in that the primary natural frequency f _{0 of the} vibration isolator constituted by the water drop receiving plate and the elastic support is set to a frequency of 16 Hz or more and 125 Hz or less in an octave band. .   The ventilation port terminal member according to claim 1, wherein the elastic support is a leaf spring.   The ventilation port terminal member according to claim 1, wherein the elastic support is a coil spring.   The ventilation port terminal member according to claim 1, wherein the elastic support is rubber.   The ventilation port terminal member according to claim 1, wherein the elastic support member is constituted by a spring and rubber. By setting the thickness of the water drop receiving plate to 0.5 mm to 5 mm, the primary natural frequency f _{0 of the} vibration isolator composed of the water drop receiving plate and the elastic support is set to be not less than 125 Hz and not less than 16 Hz in the octave band. The terminal member according to any one of claims 1 to 5, wherein the member is set to have a frequency. A building having a ventilation port terminal member provided on an outer wall such that a hood portion and a water drop receiving plate of the ventilation port terminal member according to any one of claims 1 to 6 protrude outside the outer wall surface. And
A building, wherein 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 located on a vertical line.

Images