JP2014059084A - Wall surface opening hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall surface opening hood capable of preventing inflow of water from an opening upon sudden rise of water level in the opening for aeration or ventilation which is formed on the wall surface of a building.SOLUTION: A wall surface opening hood 1A includes: a first hood body 2 of upper opening pocket shape which is water-tightly attached to the wall surface 12 while covering the whole region of the opening 13 formed on the wall surface 12 therewith; a second hood body 3 of lower opening pocket shape which is attached integrally with the wall surface 12 and the first hood body 2 or water-tightly with the wall surface 12 while covering a ventilating opening 2b of the first hood body 2 opened to the vertically upper side with a void therewith; and at least one drain structure 4 disposed on a bottom part 2a of the first hood body 2. Therein, the drain structure 4 includes drain holes 5 perforated on the bottom part 2a, a float housing part 6 which is coupled to each of drain holes 5 and is capable of delivering water from/to an external part and a float 7 which is housed in the float housing part 6 and rises and falls in the vertical direction in accordance with the rising and the falling of a water level of the surrounding are provided.

Description

  The present invention relates to a wall opening hood capable of preventing inflow of water from an opening at the time of a sudden rise in water level due to a tsunami or the like in an opening for ventilation or ventilation formed on a wall surface of a building.

Conventionally, in a building related to a nuclear power generation facility, a thermal power generation facility, or the like, an opening may be formed on a wall surface for ventilation or ventilation.
On the other hand, in the event of a natural disaster or tsunami, it is assumed that the water level will rise to the opening of the building in nuclear power generation or thermal power generation facilities. At this time, water intrusion from the opening in the building is prevented. In some cases, it can prevent fatal damage to equipment.
Therefore, it is effective to provide a hood for preventing flooding in the opening formed in the wall surface of the building.
Although the prior art which has the same problem to be solved as the present invention has not been found at present, the prior arts in the related fields are disclosed as follows.

Patent Document 1 discloses a device relating to an inner window that is openable and closable under the name of “inner window”.
The inner window disclosed in Patent Document 1 is an inner window formed by pivoting an inner opening shoji to the window frame, and a vertical wall is projected integrally with the window frame on the four outer peripheral inner edges of the window frame, The outdoor side surface of the inwardly open shoji is in contact with the indoor side surface of the hanging wall through a watertight packing as appropriate, and the inwardly open shoji is pivotally attached to the window frame so that it can be opened and closed indoors. A draining frame piece that covers the upper surface of the bottom frame hanging wall of the window frame when closed is integrally or integrally protruded from the bottom of the shoji, and a dustproof filter is provided in the drain hole. A check valve that opens only in the outdoor direction is attached to each hole.
According to the device disclosed in Patent Document 1 having the above-described configuration, when the rainwater that has unexpectedly entered the lower frame passes through the dustproof filter and stays in the drainage chamber, and the water level rises to overcome the external pressure, the check valve Is pushed open and drained. Thereby, the rain water in the drainage chamber serves as a kind of water wall, and it is possible to prevent the invasion of wind and rain from the outside and the generation of splashes accompanying this.

Patent Document 2 discloses an invention relating to an air supply / exhaust device that is attached to an opening of a ventilation duct that is opened on an outer wall surface of a building or the like under the name of “rain supply / exhaust device that can prevent rainwater from blowing in”.
Patent document 2 discloses an air supply / exhaust device that can be prevented from blowing in an air supply / exhaust device that is attached to an opening of a ventilation duct on an outer wall of a building or the like, and that one end of which is an attachment end to the ventilation duct. An interior that provides a hood support plate wider than the open end surface on the open end surface of the other end, covers the hood support plate with a hood, and allows the open end surface and the internal space covered by the hood to communicate with the hood support plate An opening portion is provided, an external opening portion is provided around the attachment end surface of the hood support plate to connect the outside world and the internal space covered by the hood, and the hood has a substantially streamlined shape with low air resistance. It has an outer surface.
According to the invention disclosed in Patent Document 2 having the above configuration, the wind blowing along the outer wall of the building enters the air supply / exhaust device after changing the course and reducing the wind speed. It is possible to effectively prevent rainwater and the like from entering the duct together with the momentum. Further, even during exhaust, since it does not collide with a strong wind as described above, it is possible to prevent the backflow of exhaust. Further, by providing the airflow guide, it is possible to select and exhaust a flow path that is not affected by the wind entering the air supply / exhaust device, and it is possible to improve exhaust efficiency while preventing stagnation of exhaust.

Patent Document 3 discloses an invention relating to a ventilation hood that prevents rainwater and snow from blowing into a room from a ventilation gallery provided on a wall surface under the name of “ventilation hood”.
The ventilation gallery disclosed in Patent Document 3 is a ventilation gallery that prevents rainwater and snow from blowing into the room from the ventilation gallery provided on the wall surface. The upper end, the lower end, and the front portion of the gallery are A shielding plate is provided to prevent the rainwater or snow from blowing into the gallery, and both sides of the gallery are provided with a shielding plate at a part of the lower end portion, and the other portions are provided with openings. It is characterized by being.
According to the invention disclosed in Patent Document 3 configured as described above, rainwater and snow can be reliably prevented from being blown into the gallery.

In Patent Document 4, it is installed on a ship's mast, starboard, port, stern, etc. under the name “Waterproofing / Draining Device for Ship Lights”, and for other ships etc. for safety when navigating or anchoring the ship. There has been disclosed an invention relating to a waterproof / drainage device for a shiplight that is less likely to be immersed in the shiplight used for recognizing the ship and that discharges water that has entered the interior.
The waterproof / drainage device for a shiplight disclosed in Patent Document 4 has a hollow portion in which a light source is accommodated, and a bottom wall of a lamp body that has a light-transmitting portion that transmits light from the light source around it. In addition, there is a drain hole that is open and opened vertically, and a valve chamber is provided below the drain hole position. The valve chamber has the drain hole opened on the top surface and opened to the atmosphere on the bottom surface. And a valve body made of a sponge-like water-impermeable elastic material is accommodated in the valve chamber, and the valve body is formed in a compressed state so as to be larger than the height of the valve chamber. The drain hole is accommodated and the drain hole is closed by an elastic force corresponding to the compression allowance of the valve body.
According to the invention disclosed in Patent Document 4 configured as described above, the lamp body is expanded by the expansion of air in the lamp body when the internal temperature rises due to the lighting of the light source, even when the water is flooded by navigation under severe conditions. The said valve body is pushed open and internal water can be discharged | emitted with exhaust_gas | exhaustion.

Japanese Utility Model Publication No.59-13586 JP-A-7-233987 Japanese Patent Laid-Open No. 11-294028 JP 2011-60473 A

  In the case of the device disclosed in Patent Document 1 described above, the check valve is attached to the drain hole so as to be opened only in the outdoor direction, so that it is possible to effectively prevent rainwater entering from the vertically upper side. It is considered possible. On the other hand, when the water level rises from below vertically, as in the case of a tsunami, the check valve may rotate to open due to the rise in water level. There was a fear that water intrusion could not be reliably prevented.

  In the case of the inventions disclosed in Patent Documents 2 and 3, although it is considered that it is possible to suitably prevent the intrusion of rainwater into the ventilation holes (openings) formed in the wall surface, the water level is as that at the time of structural tsunami generation. During the ascent, it was not possible to prevent the ingress of water from the opening.

In the case of the invention disclosed in Patent Document 4, although water intrusion due to the action of water pressure from the outside can be suitably prevented, if water has once entered inside, the internal pressure (atmospheric pressure) is increased. Otherwise, it cannot be drained. In this case, in order to increase the internal atmospheric pressure, it is necessary to make the space including the opening a closed space.
However, it is impossible to make a space including an opening provided for ventilation or exhaust on the wall surface of a building as a closed space in the first place, and the technical content disclosed in Patent Document 4 cannot be applied to the present invention. It was.

  The present invention has been made in response to such a conventional situation, and its purpose is to smoothly drain the water accumulated in the bottom of the hood from the drain hole and, for example, temporarily such as when a tsunami occurs It is an object of the present invention to provide a wall surface opening hood that can reliably prevent water from entering the hood by closing the drain hole with a float when the water level rises.

In order to achieve the above object, the wall surface opening hood according to the first aspect of the present invention covers the entire area of the opening formed in the wall surface, and is watertight on the wall surface, on the outer edge of the opening, or both. The upper opening pocket-shaped first hood body and the first hood body opening vented vertically upward are covered with a gap while being integrated with the wall surface and the first hood body. Or a second hood body in the form of a lower opening pocket that is watertightly installed on the wall surface, and at least one drainage structure provided at the bottom of the first hood body, A drain hole drilled in the bottom, a float housing part connected to the drain hole and allowing water to enter and exit from the outside, and housed in the float housing part, With a float that moves up and down in the vertical direction. When the water level of the ambient rises, the block the drain hole to raise the float with the increase of the water level, is characterized in preventing the influx of water into the first hood body.
In Claim 1 of the said structure, when a 1st food body raises a water level outside, ensuring the ventilation | gas_flowing to the opening formed in a wall surface, a water level reaches to the upper end of a 1st food body. In the meantime, it has the effect of preventing water from entering the opening. Further, the second hood body covers the ventilation opening of the first hood body opened vertically upward with a gap, and rainwater enters the inside of the first hood body from the ventilation opening. It has the effect of preventing it. Further, the drainage structure provided at the bottom of the first hood body has an action of discharging the rainwater to the outside when rainwater enters the first hood body.
Further, in the drainage structure, the drainage hole formed in the first hood body has an effect of leading rainwater that has entered the first hood body into the float housing portion. Furthermore, the float housing part has an effect of allowing rainwater led out from the first hood body to pass through the hollow part and to be discharged to the outside, and to hold the float so as to be movable vertically. In addition, when the external water level rises, the float is transported vertically upward by the rising water surface, blocking the drain hole and preventing the external water from entering the first hood body. Have.

A wall surface opening hood according to a second aspect of the present invention is the wall surface opening hood according to the first aspect, wherein the connecting portion between the float housing portion and the water draining hole is reduced in diameter toward the water draining hole. A taper-shaped guide part is provided.
In the invention described in claim 2 of the above configuration, in addition to the same operation as that of the invention described in claim 1, the guide portion is provided at the connection portion between the float accommodation portion and the drain hole, and the external water level is increased. In this case, there is an effect that the float that moves vertically upward in the float accommodating portion as the water surface rises is reliably guided to the drain hole.

A wall surface opening hood according to a third aspect of the present invention is the wall surface opening hood according to the first or second aspect, wherein the float is made of an elastic material.
In addition to the same action as that of the invention described in claim 1 or 2, the invention described in claim 3 having the above-described structure is configured by an elastic material, so that the float is increased as the external water level rises. When lifted and pressed against the drain hole by water pressure, the float is elastically deformed to close the drain hole without a gap.

A wall surface opening hood according to a fourth aspect of the present invention is the wall surface opening hood according to any one of the first to third aspects, wherein the second hood body is a first hood body. On the other hand, not only the ventilation opening but also at least a part of its side surface is covered with a gap.
In addition to the effects of the first to third aspects of the invention, the second hood body covers the first hood body while having a gap also on the side surface. Thus, when rainwater enters the surface of the first hood body from the lower end of the second hood body in the case of a storm, the interior of the first hood body exceeds the ventilation opening. It has the effect of preventing rainwater from entering.

According to the first aspect of the present invention, by providing the first hood body, when a tsunami or the like occurs and a temporary external water level rise occurs, the water level is the first hood body. As long as it does not exceed the ventilation opening, water can be prevented from flowing into the opening formed on the wall surface.
In addition, when the first hood body is permanently installed on the wall surface, the second hood body can cover the ventilation opening of the first hood body that is opened vertically upward. Rain water can be prevented from entering the inside of the hood body. In addition, since the second hood body also acts as an eave, rainwater can be prevented from directly entering the opening formed in the wall surface from the outside.
Furthermore, the invention according to claim 1 is provided with a drainage structure, so that even if rainwater enters the first hood body, the rainwater is surely discharged to the outside, and in the unlikely event a tsunami, etc. When the water level rises outside the wall surface due to the occurrence of water, the water drainage hole can be reliably closed by the float and water can be prevented from entering the first hood.

In addition to the same effect as that of the invention of the first aspect, the invention according to the second aspect includes a guide portion, so that when the float moves vertically upward in the float housing portion as the external water level rises, A float can be guide | induced so that the center in the planar shape of a float may correspond with the center of a drain hole.
As a result, when the drain hole is blocked by the float, the risk of forming a gap can be greatly reduced.
Therefore, when the external water level rises due to the occurrence of a tsunami or the like, the drain hole can be reliably closed by the float, so that the water does not enter the first hood body. It is possible to reliably prevent water from entering the opening formed in the wall surface from the inside of one hood.

According to the invention described in claim 3, in addition to the same effect as that of the invention described in claim 1 or 2, the force (water pressure) that presses the float from vertically downward to vertically upward to the drain hole When this occurs, the float can be elastically deformed to close the drain hole without a gap.
Thereby, when the external water level rises, the risk of external water entering the first hood can be further reduced.

According to the invention described in claim 4, in addition to the same effects as the invention described in each of claims 1 to 3, infiltration of rainwater from the ventilation opening of the first hood body is more reliably prevented. it can.
Therefore, the effect of preventing flooding to the opening by the wall surface opening hood according to claim 4 can be further enhanced.

It is a perspective view which shows the external appearance of the hood for wall surface opening which concerns on Example 1 of this invention. It is the sectional view on the AA line in FIG. It is a partial expanded sectional view of the hood for wall surface opening which concerns on Example 1 of this invention. It is a partial expanded sectional view of the hood for wall surface opening which concerns on Example 1 of this invention. It is a perspective view which shows the external appearance of the hood for wall surface opening which concerns on Example 2 of this invention.

  The wall surface opening hood according to the embodiment of the present invention will be described in detail with reference to Examples 1 and 2.

A wall surface opening hood 1A according to Embodiment 1 of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a perspective view showing an appearance of a wall surface opening hood according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG.
The wall opening hood 1A according to the first embodiment of the present invention prevents water from entering from the opening 13 formed on the wall surface for ventilation or ventilation in, for example, a building in a nuclear power generation facility or a power generation facility. Is to do.

As shown in FIGS. 1 and 2, the wall surface opening hood 1 </ b> A according to the first embodiment has a top opening pocket-like shape that is watertightly installed on the wall surface 12 while covering the entire area of the opening 13 formed on the wall surface 12. One hood body 2 and a ventilation opening 2b opened vertically upward in the first hood body 2 are covered with a gap while being integrated with the wall surface 12 and the first hood body 2 in a watertight manner. The second hood body 3 having a lower opening pocket shape and at least one drainage structure 4 provided on the bottom 2a of the second hood body 3 are provided.
In addition, as shown in FIG. 2, the opening 13 formed in the wall surface 12 may be provided with a louver 14 for the purpose of blindfolding or preventing the entry of harmful insects from the outside. Further, although not particularly shown in FIGS. 1 and 2, a ventilation or exhaust duct may be connected to the opening 13 of the wall surface 12.
In addition, it is assumed that the wall opening hood 1 </ b> A according to the first embodiment is provided later on the opening 13 of the existing building. In this case, a drainer 17 may be provided at the lower end of the opening 13. Even if this drainer 17 is not provided, there is no problem in the function of the wall surface opening hood 1A according to the first embodiment, but when the drainer 17 is already installed in the opening 13, it is not necessary to remove the drainer 17 on purpose.
Further, as shown in FIG. 2, the drainage structure 4 in the wall surface opening hood 1 </ b> A according to the first embodiment is formed in the drainage hole 5 formed in the bottom portion 2 a of the first hood body 2. A float housing part 6 made of a body or made of a mesh-shaped cylinder is connected, and the float housing part 6 is made of a material that floats on water, for example, a spherical float 7 is housed. It is.
The drainage structure 4 may be configured integrally with the first hood body 2, but as shown in FIG. 2, for example, using a fixing tool such as a bolt 11, You may provide separately in the bottom part 2a. In this case, the connection portion between the bottom portion 2a of the first hood body 2 and the drainage structure 4 needs to have a watertight structure.

In addition, in order to supplement the strength of the float housing portion 6, fin-shaped reinforcing members 10 are provided at a plurality of locations so as to connect the outer surface of the float housing portion 6 and the bottom portion 2 a of the first hood body 2. (See FIGS. 1 and 2).
Further, in the wall surface opening hood 1 </ b> A according to the first embodiment, the float 7 may be prevented from falling by providing, for example, a drop prevention material 8 made of a mesh body in the drainage opening 6 a of the float housing portion 6.

Here, with reference to FIG. 3, in the hood 1A for opening a wall according to the first embodiment, a mechanism in which rainwater that has entered the first hood body 2 is discharged to the outside will be described in detail.
FIG. 3 is a partial enlarged cross-sectional view of the wall surface opening hood according to the first embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the same part as what was described in FIG. 1 or FIG. 2, and the description about the structure is abbreviate | omitted.
Rainwater that has entered from the vent opening 2b of the first hood body 2 shown in FIG. 2 reaches the bottom 2a of the first hood body 2 shown in FIG. The float storage unit 6 is led out.
At this time, since the float 7 accommodated in the float accommodating portion 6 remains arranged on the drain opening 6 a side of the float accommodating portion 6 due to the action of gravity, rainwater is contained in the hollow portion of the float accommodating portion 6. Through the drainage opening 6a. Moreover, when the float accommodating part 6 is provided with the fall prevention material 8, rainwater is discharged | emitted from the hole or space | gap formed through this fall prevention material 8 outside.

2A and 3B, the wall-opening hood 1A according to the first embodiment is provided with a fall prevention material 8 capable of entering and exiting the water in the thickness direction, and the float 7 from the drain opening 6a of the float housing portion 6. However, the float 7 can be accommodated and held in the float accommodating portion 6 without providing the fall prevention member 8.
For example, when the float accommodating portion 6 is formed of a cylindrical body, the diameter of the drainage opening 6a of the float accommodating portion 6 is set smaller than the diameter of the float 7, and the drainage opening 6a is in the vicinity of the drainage opening 6a. What is necessary is just to form at least 1 slit which penetrates the thick part of the float accommodating part 6 in the circumferential direction (not shown).
By providing the structure as described above, the float 7 can be housed and held inside the float housing portion 6 without having the fall prevention material 8, and even when the drainage opening 6 a is completely blocked by the float 7, Rainwater can be reliably discharged from at least one slit formed in the vicinity of the drainage opening 6a of the float housing part 6.
In addition, when providing the above structures, it is necessary to pay attention to the slit formation position so that the slit formed in the vicinity of the drainage opening 6 a is not completely closed by the float 7.

Further, as another example of the structure of the float accommodating part 6, the float accommodating part 6 itself is a bottomed container body, and at least the bottom part of such a float accommodating part 6 is a mesh material that allows water to enter and exit freely. There is also a method of configuring by.
When the float housing part 6 is configured as described above, rainwater can be reliably discharged from the bottom of the float housing part 6 while allowing the float 7 to move vertically in the float housing part 6. .

In addition, in the hood 1A for wall surface opening which concerns on Example 1 shown in FIG. 1 thru | or FIG. 3, although the case where the bottom part 2a of the 1st hood body 2 is horizontal is mentioned as an example, the 1st hood is demonstrated. There is no particular need to keep the bottom 2a of the body 2 horizontal, and although not shown, the bottom 2a may fall into a mortar-like shape toward the drain hole 5 and be recessed.
In this case, since rainwater that has entered from the ventilation opening 2b of the first hood body 2 can be efficiently collected in the drain hole 5 of the bottom portion 2a, the drainage structure 4 can be more smoothly transferred from the first hood body 2. Rainwater can be derived.
In this case, since the time during which rainwater stays at the bottom portion 2a of the first hood body 2 can be shortened, when the first hood body 2 is constituted by a thick metal plate or the like, for example, corrosion hardly occurs. It is possible to maintain the strength and durability of the first hood body 2 over a long period of time.

Subsequently, referring to FIG. 4, when a tsunami or the like occurs and the water level outside the wall surface 12 temporarily rises, water from the opening 13 is opened by the wall surface opening hood 1 </ b> A according to the first embodiment. Explain the mechanism that prevents entry.
It is a partial expanded sectional view of the hood for wall surface opening which concerns on Example 1 of this invention. The same parts as those described in FIGS. 1 to 3 are denoted by the same reference numerals, and description of the configuration is omitted.
As shown in FIG. 4, the occurrence of flooding and tsunami river, the water level of the outer wall 12 and rises above the level of the discharge apertures 6a in the water draining structure 4 (the level F ₁ in FIG. 4 See), water enters the inside of the float housing part 6 from the drain opening 6a, and pushes up the float 7 vertically upward in the hollow part of the float housing part 6.
Then, as shown by the symbol F ₂ in FIG. 4, when the water level further rises, the drain hole 5 of the first hood body 2 is blocked by the float 7 and enters the first hood body 2. the ingress of water is prevented (see the water level F ₃ in FIG. 4). As a result, unless the water level reaches the vent opening 2b of the first hood body 2 shown in FIG. 2, the entry of water into the first hood body 2 is prevented.
This means that even when a situation occurs in which the water level outside the wall surface 12 exceeds the level of the opening 13, the water level is not increased until the water level reaches the level of the ventilation opening 2 b of the first hood body 2. It means that the inflow of water to 13 can be prevented.
Therefore, according to the wall opening hood 1A according to the first embodiment, when a temporary rise in the water level occurs due to a natural disaster or the like, water from the opening 13 formed in the wall surface 12 of the building to the inside of the building. Infiltration can be prevented, and inundation damage to equipment in the building can be suitably prevented.

On the other hand, when the water level drops after the water level rises, the float 7 moves to the drain opening 6a side of the float housing part 6 as the water level decreases, so that the water that has entered from the vent opening 2b of the first hood body 2 Can be discharged from the water draining structure 4 again.
Thus, the wall opening hood 1A according to the first embodiment is a durable article that can be used repeatedly.

Furthermore, the operation of the drainage structure 4 of the wall opening hood 1A according to the first embodiment can be easily checked by the following method.
For example, the entire float storage unit 6 is covered with a funnel-shaped container body while maintaining a watertight or airtight state, and the drainage opening 6a of the float storage unit 6 is forcibly supplied with high-pressure water or compressed air from the outside. It is possible to check whether or not there is a problem in the drainage structure 4 by checking whether or not the flow of the high-pressure water or compressed air occurs.
That is, a state in which a rise in the external water level occurs is created in a pseudo manner, and it is confirmed whether or not the effect of closing the drain hole 5 by the float 7 is reliably exhibited.
In this case, if water or air does not flow in the drainage structure 4, it can be determined that there is no malfunction. On the other hand, if water or air flow occurs in the drainage structure 4, repair or replacement of the drainage structure 4 is performed. Treatment needs to be performed.
As described above, the wall surface opening hood 1 </ b> A according to the first embodiment has an effect that the maintenance inspection work can be easily performed from the outside of the wall surface 12.
Therefore, when the wall opening hood 1A according to the first embodiment is used, it is easy to maintain its performance suitably for a long period of time, and thus there is an advantage that a highly reliable disaster prevention facility can be provided.

In addition, the float 7 used in the drainage structure 4 of the wall opening hood 1A according to the first embodiment has a specific gravity that is lighter than water and can reliably close the drainage hole 5, and any shape and Material may be used.
In particular, when the float 7 is made of an elastic material made of rubber, silicon, synthetic resin, etc., the drain hole 5 can be closed by flexibly elastically deforming the float 7 by the water pressure when the water level rises. Therefore, the water drainage structure 4 having a higher water immersion prevention effect can be provided by configuring the float 7 with an elastic material.
Needless to say, the diameter of the float 7 needs to be set larger than the diameter of the drain hole 5.

Further, in particular, when an elastic material is used as a material constituting the float 7, the float 7 is deteriorated with time, and the drain hole 5 cannot be sufficiently closed when the water level rises. It is expected that problems such as damage to the device will occur.
In order to deal with such a problem, it is preferable that the float 7 is configured to be able to be taken in and out of the float accommodating portion 6 and the float 7 is exchanged at regular intervals.
More specifically, when the float housing part 6 includes the fall prevention member 8, it is preferable that the float 7 be exchangeable by providing a structure that allows the fall prevention member 8 to be removed from the float housing part 6. Or when the float accommodating part 6 is not provided with the fall prevention material 8, it is good to comprise the float accommodating part 6 so that a vertical up-down direction can be divided | segmented, and it is good to exchange the float 7. FIG.
In any case, since the float 7 can be replaced, the reliability of the wall surface opening hood 1A according to the first embodiment can be further improved.

Further, the wall opening hood 1A according to the first embodiment includes a drain hole 5 formed in the bottom portion 2a of the first hood body 2 and a connection portion between the float housing portion 6 as shown in FIGS. In addition, a taper-shaped guide portion 9 that decreases in diameter toward the drain hole 5 may be provided.
In this case, as shown in FIG. 4, when the water level rises from the water level F ₁ to the water level F ₂ , the float 7 can be smoothly and reliably guided to the water drain hole 5. In addition, when the guide portion 9 is provided at the connection portion between the drain hole 5 and the float housing portion 6, the float 7 is guided to the drain hole 5 so that the center of the float 7 and the center of the drain hole 5 are aligned. Therefore, when the drain hole 5 is closed by the float 7, there is an advantage that it is difficult to form a gap between them.
As a result, it is possible to further improve the infiltration prevention effect in the water drainage structure 4 of the wall surface opening hood 1A according to the first embodiment.

Returning to FIGS. 1 and 2 again, the hood 1A for opening a wall according to the first embodiment will be described.
As shown in FIGS. 1 and 2, in the wall surface opening hood 1 </ b> A according to the first embodiment, the lower end of the second hood body 3 is provided with a gap 18 in the vicinity of the ventilation opening 2 b of the first hood body 2. It is good also as a structure provided with the overlap part 15 which overlaps 3a vicinity. That is, the second hood body 3 has a structure in which at least a part of the side surface of the first hood body 3 is covered with a gap and overlapped.
In this case, it is possible to suitably prevent rainwater from entering from the ventilation opening 2b of the first hood body 2 during a storm.
In this case, as shown in FIG. 2, the air inside the wall surface 12 of the building or the like circulates in the first hood body 2 through the opening 13 (see the arrow indicated by the symbol B in the figure). The air in one hood body 2 flows between the outside through the air gap opening 2b through the gap 18 between the second hood body 3 and the first hood body 2 (references C and D in the figure). (See arrow shown).
In this case, a reinforcing plate 16 may be provided in the gap 18 in order to reinforce the vicinity of the ventilation opening 2b of the first hood body 2 and the vicinity of the lower end 3a of the second hood body 3.
In this case, since the rigidity of the wall opening hood 1A according to the first embodiment is increased, the strength when a high water pressure acts on the first hood body 2 or the second hood body 3 at the time of tsunami generation or the like is maintained. Can do.

A wall surface opening hood according to a second embodiment of the present invention will be described in detail with reference to FIG.
In the hood 1A for opening a wall according to the first embodiment, the first hood body 2 and the second hood body 3 are described as an example, but the first hood body is described as an example. 2 and the 2nd hood body 3 may be separately installed in the wall surface 12, and the wall surface opening hood which concerns on this invention may be comprised.
FIG. 5 is a perspective view showing an appearance of a wall surface opening hood according to Embodiment 2 of the present invention. The same parts as those described in FIGS. 1 to 4 are denoted by the same reference numerals, and description of the configuration is omitted.
As shown in FIG. 5, the wall surface opening hood 1 </ b> B according to the second embodiment is separated from the first hood body 2 that is watertightly installed while covering the opening 13 formed in the wall surface 12. A second hood body 3 covering the ventilation opening 2b of one hood body 2 is water-tightly attached to the wall surface 12.
The actions and effects of the wall surface opening hood 1B according to the second embodiment as described above are the same as those of the wall surface opening hood 1A according to the first embodiment described above, but in the case of the wall surface opening hood 1B according to the second embodiment. Has the merit that the first hood body 2 and the second hood body 3 can be separately manufactured and transported.
In this case, there exists an advantage that the cost concerning manufacture and installation of the hood 1B for wall surface opening which concerns on Example 2 can be made cheap.

Finally, a description will be given of components common to the wall surface opening hoods 1A and 1B according to the first and second embodiments.
In the hoods 1A and 1B for wall surface opening according to the present invention, the first hood body 2, the second hood body 3, and the drainage structure 4, and further, the wall surface opening hoods 1A and 1B and the wall surface 12 composed of these. The connection part of the above-mentioned needs to have sufficient durability against the water pressure when a temporary rise of the water level occurs due to a tsunami or wind and flood damage.
Therefore, each member constituting the first hood body 2 and the second hood body 3 and the water draining structure 4 is a material having sufficient strength and durability to satisfy the above-described needs. Is preferably used. More specifically, a thick steel plate, reinforced concrete, precast concrete, or the like may be used.
In addition, the connecting portion between the wall surface opening hoods 1A and 1B and the wall surface 12 according to the present invention needs to be made robust by performing, for example, welding or providing a shield structure.

In the wall opening hoods 1A and 1B according to the first and second embodiments, the case where the first hood body 2 is installed on the wall surface 12 is described as an example. It is not always necessary to provide the body 2 on the wall surface 12, and the first hood body 2 may be installed so that the edge of the first hood body 2 and the outer edge of the opening 13 overlap each other.
In this case, since the planar shape of the wall surface opening hoods 1A and 1B can be minimized while exhibiting the same function as the wall surface opening hoods 1A and B according to the first and second embodiments, the manufacturing cost can be saved. There is a merit that you can.
Further, when the outer edge of the opening 13 is made of metal, it is easy to attach the first hood body 2 to this portion by welding or the like, so that there is a merit that workability during installation work can be improved.

In addition, when the first hood body 2 is provided at the edge of the opening 13 as described above, the ventilation opening 2b of the first hood body 2 is further vertically above the upper end in the vertical direction of the opening 13. When it is desired to arrange the first hood body 2, the edge of the first hood body 2 may be connected to both the outer edge of the opening 13 and the wall surface 12.
In this case, in addition to the effect of reducing the manufacturing cost of the wall surface opening hoods 1A and 1B according to the first and second embodiments as described above, even when the water level rises to a higher position, the wall surface opening according to the first and second embodiments. It can be expected that the hoods 1A and 1B can prevent water from entering the opening 13 appropriately.

  As described above, the present invention relates to a wall opening hood capable of preventing the inflow of water from an opening for ventilation or ventilation formed on the wall surface of a building when a sudden water level rises due to a tsunami or the like. It can be used in fields related to general buildings, special buildings, and disaster prevention facilities.

DESCRIPTION OF SYMBOLS 1A, 1B ... Hood for wall surface opening 2 ... 1st food body 2a ... Bottom part 2b ... Opening for ventilation 3 ... 2nd food body 3a ... Lower end 4 ... Drain structure 5 ... Drain hole 6 ... Float accommodating part 6a ... discharge apertures 7 ... float 8 ... drop preventing member 9 ... guide portion 10 ... reinforcing member 11 ... bolt 12 ... wall 13 ... opening 14 ... louver 15 ... overlapping portion 16 ... reinforcing plate 17 ... drainer 18 ... void F ₁ to F ₃ ... water level

Claims (4)

A first hood body in the form of an upper opening pocket that is watertightly installed on the wall surface, on the outer edge of the opening, or both, while covering the entire area of the opening formed in the wall surface; A lower opening that is installed integrally with the wall surface and the first hood body or water-tightly on the wall surface while covering the opening for ventilation of the first hood body to be opened with a gap. A pocket-shaped second hood body and at least one water draining structure provided at the bottom of the first hood body;
The drainage structure includes a drainage hole formed in the bottom portion, a float accommodating portion that is connected to the drainage hole and allows water to enter and exit from the outside, and is accommodated in the float accommodating portion. And a float that rises and falls in the vertical direction as the surrounding water level rises and falls,
When the water level around the drainage structure rises, the float is raised along with the rise of the water level to block the drainage hole, thereby preventing the inflow of water into the first hood body. Characteristic hood for wall opening.   The wall opening hood according to claim 1, wherein a connection portion between the float housing portion and the drain hole includes a tapered guide portion having a diameter reduced toward the drain hole.   The wall surface opening hood according to claim 1, wherein the float is made of an elastic material.   2. The second hood body covers the first hood body with not only the ventilation opening but also at least a part of its side surface with a gap. The hood for wall surface opening of any one of Claim 3.

Images