Ventilation device

Abstract

To reduce cost, improve designability and waterproofness, and achieve excellent workability.SOLUTION: A ventilation path for ventilating outside air and an indoor space in a ventilation device A which is provided between an external wall side wall surface 100 of a building and a vertical plate 104 supported on a support member 101 provided at an interval from the external wall side wall surface 100 is formed of a ventilation hole 2k, a gap between a bottom piece 2f and a back board piece 2c, a gap between the back board piece 2c and a lower side ventilation suppression piece 1c, and a gap between a back board piece 1d and the support member 101.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a ventilation device provided between an outer wall side wall surface of a building and a vertical plate such as a windbreak, a nose concealment, or a curtain board supported by a support member provided at a distance from the outer wall side wall surface.

Background Art

[0002] Conventionally, regarding the gable windbreak of a building, in order to improve the design property, the eaves may be made smaller by reducing the height of the windbreak. In this case, since sufficient waterproof rising on the building body side cannot be provided, when providing a ventilation opening for ventilation in the eaves part, sufficient consideration must be given to the blowing-in of rainwater into the building.

[0003] Patent Document 1 discloses a ventilation device having a pair of ventilation pieces each provided with a ventilation slit hole, and a ventilation member formed in a U-shaped cross-section that is fitted inside a water return member formed in a U-shaped cross-section and fixed to the base material of the outer wall, and a shielding member that is inserted between the pair of ventilation pieces of the ventilation member and covers the lower slit hole of the ventilation member from above. According to the ventilation device of Patent Document 1, by providing double ventilation slit holes in the ventilation member, providing a shielding member that covers between these slit holes, and providing a water return member outside the slit holes, the ventilation resistance can be increased and the waterproof performance can be improved.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in Patent Document 1, since the ventilation device is constituted by a water return member, a ventilation member, and a shielding member, there is a problem that the number of parts increases. Further, in Patent Document 1, since the ventilation slit holes are visible from under the eaves, there is a problem that the design property is impaired. Moreover, in Patent Document 1, since the ventilation device is fixed to the outer wall, when the wall surface of the outer wall has a complicated structure formed by alcoves or the like and there are protruding and recessed corners, it is necessary to fix the ventilation device to the outer wall using a dedicated fixture or the like, resulting in poor workability.

[0006] Furthermore, in Patent Document 1, when an error occurs in the dimensions of the base material for hiding the nose, a gap is formed between the nose hiding part and the ventilation device, thereby forming a water intrusion path and reducing the waterproof property. Also, in order to prevent such a gap from occurring, high construction accuracy is required, and an improvement in easier workability is desired.

[0007] An object of the present invention is to provide a ventilation device that can reduce costs, improve design property and waterproof property, and realize excellent workability.

Means for Solving the Problems

[0008] The ventilation device according to the present invention is a ventilation device provided between an outer wall side wall surface of a building and a vertical plate supported by a support member provided at a distance from the outer wall side wall surface, and includes a contact piece that contacts the outer wall side wall surface, an upper ventilation suppressing piece connected above the contact piece, a lower ventilation suppressing piece connected below the contact piece, a fixing piece fixed to the support member, a ventilation hole for ventilation, a ventilation piece connected to the fixing piece and extending downward from the fixing piece, a bottom piece extending from the lower end of the ventilation piece toward the outer wall side wall surface and constituting a bottom surface, a first water return piece connected to the upper ventilation suppressing piece and facing the contact piece, and a second water return piece connected to the fixing piece and disposed between the ventilation hole and the contact piece. The ventilation path for ventilating the outside air and the indoor space is formed by the ventilation hole, the gap between the bottom piece and the second water return piece, the gap between the second water return piece and the lower ventilation suppressing piece, and the gap between the first water return piece and the support member.

Effect of the Invention

[0009] According to the present invention, the cost can be reduced, the design property and waterproof property can be improved, and excellent workability can be realized.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0011] Hereinafter, with appropriate reference to the drawings, the ventilation device according to the embodiment of the present invention will be described in detail. In the drawings, the x-axis, y-axis, and z-axis form a three-axis orthogonal coordinate system, and the positive direction of the y-axis is the front direction, the negative direction of the y-axis is the rear direction, the positive direction of the x-axis is the left direction, the negative direction of the x-axis is the right direction, the positive direction of the z-axis is the upward direction, and the negative direction of the z-axis is the downward direction.

[0012] (Embodiment 1) <Configuration of the Ventilation Device> The configuration of the ventilation device A according to Embodiment 1 of the present invention will be described in detail below with reference to FIGS. 1 to 4.

[0013] In FIG. 2, FIG. 2(a) is a front view of the water return member 1, and FIG. 2(b) is a side view of the water return member 1. Further, in FIG. 4, FIG. 4(a) is a front view of the ventilation member 2, and FIG. 4(b) is a bottom view of the ventilation member 2.

[0014] The ventilation device A is provided between the outer wall side wall surface 100 of the building and the vertical plate 104 supported by the support member 101 provided at a distance from the outer wall side wall surface 100, and ventilates the outside air and the indoor space. The ventilation device A is composed of a water return member 1, a ventilation member 2, a watertight member 3, and a heat foam member 4. Here, the vertical plate 104 is a windbreak, a nose hiding, a curtain plate, or the like. In addition, in FIG. 3, the description of the watertight member 3 and the heat foam member 4 is omitted.

[0015] The water return member 1 is fixed to the outer wall side wall surface 100 by screws 102. Note that the water return member 1 may be fixed to the outer wall side wall surface 100 by other fixing means such as nails other than the screws 102.

[0016] Specifically, the water return member 1 includes a contact piece 1a, an upper ventilation suppressing piece 1b, a lower ventilation suppressing piece 1c, and a water return piece 1d.

[0017] The contact piece 1a is provided with a mounting hole 1e for inserting a screw 102. The contact piece 1a is in contact with the outer wall side wall surface 100 and is fixed to the outer wall side wall surface 100 by a screw 102.

[0018] The upper ventilation suppressing piece 1b is bent at a right angle to the left from the upper end of the contact piece 1a and extends to the left.

[0019] The lower ventilation suppressing piece 1c is bent at a right angle to the left from the lower end of the contact piece 1a and extends to the left, and is opposed to the upper ventilation suppressing piece 1b.

[0020] The water return piece 1d is bent at a right angle downward from the left end of the upper ventilation suppressing piece 1b and hangs down. The water return piece 1d is disposed between the contact piece 1a and the support member 101 and is opposed to the contact piece 1a with a space therebetween.

[0021] The ventilation member 2 is fixed to the support member 101 provided at a distance from the outer wall side wall surface 100 by a screw 103 and is connected to the water return member 1. Note that the ventilation member 2 may be fixed to the support member 101 by other fixing means such as nails other than the screw 103.

[0022] Specifically, the ventilation member 2 includes an upper piece 2a, a folded-back piece 2b, a water return piece 2c, an extended piece 2d, a hanging piece 2e, a bottom piece 2f, a side piece 2g, and a connecting piece 2h. Here, the upper piece 2a and the folded-back piece 2b constitute a fixing piece fixed to the support member 101 by a screw 103. Also, the extended piece 2d and the hanging piece 2e constitute a ventilation piece.

[0023] The upper piece 2a is provided with a mounting hole 2i for inserting a screw 103.

[0024] The folded piece 2b is folded 180 degrees from the left end of the upper piece 2a to the right and above the upper piece 2a and extends to the right. The folded piece 2b is provided with a mounting hole 2j for inserting the screw 103 while facing the mounting hole 2i.

[0025] The water-returning piece 2c is connected to the folded piece 2b and is bent downward at a right angle from the right end of the folded piece 2b and hangs down. The water-returning piece 2c is disposed between the ventilation hole 2k and the contact piece 1a and faces the ventilation hole 2k with a gap therebetween.

[0026] The extending piece 2d is bent downward from the right end of the upper piece 2a and extends downward so as to gradually approach the vertical plate 104, and faces the water-returning piece 2c with a gap therebetween. A plurality of ventilation holes 2k, which are elongated holes along the extending direction, are arranged in parallel along the longitudinal direction (the depth direction in FIG. 1) of the ventilation device A on the extending piece 2d. The ventilation holes 2k face the vertical plate 104.

[0027] The hanging piece 2e is bent downward from the lower end of the extending piece 2d and hangs down.

[0028] The bottom piece 2f extends from the lower end of the hanging piece 2e toward the outer wall side wall surface 100, connects the lower end of the hanging piece 2e and the lower end of the side piece 2g, and constitutes the bottom surface of the ventilation device A.

[0029] The side piece 2g is bent upward at a right angle from the right end of the bottom piece 2f and extends. The side piece 2g abuts against the outer wall side wall surface 100.

[0030] The connecting piece 2h is bent leftward at a right angle from the upper end of the side piece 2g and extends leftward, and is connected to the lower ventilation suppressing piece 1c. The connecting piece 2h faces the bottom piece 2f with a gap therebetween.

[0031] The watertight member 3 is long and is adhered to the lower surface of the lower ventilation suppressing piece 1c of the water return member 1 along the longitudinal direction of the ventilation device A by a double-sided tape or the like. The watertight member 3 is a resin foam such as ethylene propylene rubber (EPDM). The watertight member 3 seals the gap between the lower ventilation suppressing piece 1c of the water return member 1 and the connecting piece 2h of the ventilation member 2 by being compressed by the connecting piece 2h of the ventilation member 2.

[0032] The heat-expandable member 4 is long and is adhered to the upper surface of the upper ventilation suppressing piece 1b of the water return member 1 along the longitudinal direction of the ventilation device A by a double-sided tape or the like. The heat-expandable member 4 is a non-combustible volume-expanding material and thermally expands when receiving the heat of a flame.

[0033] In the ventilation device A, a space 5a surrounded by the extension piece 2d, the water return piece 2c, the bottom piece 2f, and the hanging piece 2e is formed. Further, in the ventilation device A, a space 5b surrounded by the water return piece 2c, the contact piece 1a, the upper ventilation suppressing piece 1b, the lower ventilation suppressing piece 1c, the water return piece 1d, and the support member 101 is formed. Furthermore, in the ventilation device A, a space 5c surrounded by the upper ventilation suppressing piece 1b, the outer wall side wall surface 100, and the support member 101 is formed.

[0034] The space 5a communicates with the outside air through the ventilation hole 2k. The space 5b communicates with the space 5a through the gap between the lower ventilation suppressing piece 1c and the water return piece 2c. The space 5c communicates with the space 5b through the gap between the water return piece 1d and the support member 101. The space 5c communicates with the indoor space.

[0035] In the ventilation device A having the above configuration, the ventilation path for ventilating the outside air and the indoor space is formed by the ventilation hole 2k, the gap between the bottom piece 2f and the water return piece 2c, the gap between the water return piece 2c and the lower ventilation suppressing piece 1c, and the gap between the water return piece 1d and the support member 101.

[0036] <Manufacturing method and installation method of the ventilation device> The manufacturing method and installation method of the ventilation device A according to Embodiment 1 of the present invention will be described in detail below with reference to FIG. 5.

[0037] In FIG. 5, FIG. 5(a) shows the process of attaching the water return member 1 to the outer wall side wall surface 100, FIG. 5(b) shows the process of attaching the ventilation member 2 to the support member 101, and FIG. 5(c) shows the completed state of the ventilation device A.

[0038] First, a long heat foaming member 4 is adhered to the upper surface of the upper ventilation suppressing piece 1b of the water return member 1 along the longitudinal direction of the ventilation device A by means of a double-sided tape (not shown). Also, a long watertight member 3 is adhered to the lower surface of the lower ventilation suppressing piece 1c of the water return member 1 along the longitudinal direction of the ventilation device A by means of a double-sided tape (not shown).

[0039] Next, the water return member 1 is fixed to the outer wall side wall surface 100 by a screw 102 inserted through the mounting hole 1e of the water return member 1 (FIG. 5(a)).

[0040] Next, the ventilation member 2 is fixed to the support member 101 by screws 103 inserted through the mounting holes 2i and 2j of the ventilation member 2 (FIG. 5(b)). At this time, by compressing the watertight member 3 with the connection piece 2h, the gap between the lower ventilation suppressing piece 1c of the water return member 1 and the connection piece 2h of the ventilation member 2 is sealed by the watertight member 3.

[0041] Thereby, the ventilation device A is completed (FIG. 5(c)).

[0042] In this way, after fixing the water return member 1 to the outer wall side wall surface 100, by attaching the ventilation member 2 in contact with the water return member 1 via the watertight member 3, it is possible to eliminate the need for fixing between the water return member 1 and the ventilation member 2, and easy construction becomes possible.

[0043] In addition, when attaching a ventilation device to the outer wall side wall surface 100 with a complex shape having an alcove or the like, by attaching only the ventilation member 2 to the eaves board according to the shape of the outer wall side wall surface 100, regardless of the shape of the outer wall side wall surface 100, the eaves tip can be connected by a continuous design with the ventilation member 2. Further, fixtures for the outside corner and the inside corner can be made unnecessary, and the cost for attaching the ventilation device can be suppressed.

[0044] Furthermore, even when the position of the support member 101 with respect to the outer wall side wall surface 100 is displaced and the eaves projection changes, by attaching the ventilation member 2 in contact with the water return member 1 via the watertight member 3, the distance between the outer wall side wall surface 100 and the side piece 2g of the ventilation member 2 can be made variable, and the ventilation device A can be attached. In this way, even when the eaves projection changes, since the ventilation device A alone can be adjusted so that no gap is generated between the ventilation device A and the outer wall side wall surface 100 or the vertical plate 104, waterproofness can be ensured, which is different from Patent Document 1.

[0045] Note that the heat foaming member 4 is not limited to being provided on the upper surface of the upper ventilation suppressing piece 1b, and may be provided on the upper surface of the lower ventilation suppressing piece 1c, the upper surface of the bottom piece 2f, or the left surface of the water return piece 1d (the surface facing the support member 101). Further, not limited to the case of providing one heat foaming member 4, it may be provided on any two or three or all of the upper surface of the lower ventilation suppressing piece 1c, Negative film the upper surface of 2f, the upper surface of the upper ventilation suppressing piece 1b, and the left surface of the water return piece 1d.

[0046] <Operation of the ventilation device> The operation of the ventilation device A according to Embodiment 1 of the present invention will be described in detail below.

[0047] In the ventilation device A, as shown by the arrow line S1 in FIG. 1, the outside air ventilates through the ventilation hole 2k of the extended piece 2d into the space 5a, ventilates through the gap between the water return piece 2c and the bottom piece 2f into the space 5b, and ventilates through the gap between the water return piece 1d and the support member 101 into the space 5c, thereby ventilating the outside air and the indoor space.

[0048] During a storm, rainwater that has entered the space 5a through the ventilation hole 2k hits the water return piece 2c and falls or adheres to the water return piece 2c. Thereby, it is possible to reduce the blowing of the rainwater that has entered the space 5a through the ventilation hole 2k into the building interior.

[0049] Rainwater that cannot be prevented from entering by the water return piece 2c hits the lower surface of the lower ventilation suppressing piece 1c and falls or adheres to the lower surface of the lower ventilation suppressing piece 1c. Also, rainwater that cannot be prevented from entering by the water return piece 2c causes a swirling of the ventilation due to the lower ventilation suppressing piece 1c, the side piece 2g, and the bottom piece 2f, and generates a pressure loss by a flow in the opposite direction to the flow attempting to enter the space 5b. Thereby, it is possible to reduce the blowing of the rainwater that cannot be prevented from entering by the water return piece 2c into the building interior. Furthermore, the intrusion of the rainwater adhering to the lower ventilation suppressing piece 1c from between the lower ventilation suppressing piece 1c and the connecting piece 2h into the building interior can be prevented by the watertight member 3.

[0050] Rainwater that cannot be prevented from entering by the lower ventilation suppressing piece 1c hits the abutting piece 1a and bounces back. At this time, the rainwater that has hit the abutting piece 1a and bounced back in the direction of the support member 101 hits the water return piece 1d and falls or adheres to the water return piece 1d. Also, rainwater that cannot be prevented from entering by the lower ventilation suppressing piece 1c causes a swirling of the ventilation due to the abutting piece 1a, the upper ventilation suppressing piece 1b, and the water return piece 1d, and generates a pressure loss by a flow in the opposite direction to the flow attempting to enter the space 5c. Thereby, it is possible to reduce the blowing of the rainwater that cannot be prevented from entering by the lower ventilation suppressing piece 1c into the building interior.

[0051] When the ventilation device A receives the heat of a flame, the heat-expanded foam member 4 that has received the heat of the flame expands thermally and closes the space 5c, thereby closing the ventilation path indicated by the arrow S1 in FIG. 1 by closing the gap between the outer wall side wall surface 100 and the support member 101, and completely blocking the blowing of the flame into the indoor space. Thereby, the ventilation device A can exhibit excellent fireproof performance.

[0052] Thus, according to this embodiment, by forming a ventilation path that ventilates the outside air and the indoor space through the ventilation hole 2k, the gap between the bottom plate 2f and the lower end of the water return piece 2c, the gap between the lower end of the water return piece 2c and the left end of the lower ventilation suppressing piece 1c, and the gap between the water return piece 1d and the support member 101, high waterproof performance can be obtained and excellent workability can be realized.

[0053] Further, according to this embodiment, by configuring the ventilation device A with the water return member 1 including the contact piece 1a, the upper ventilation suppressing piece 1b, the lower ventilation suppressing piece 1c, and the water return piece 1d fixed to the outer wall side wall surface 100, and the ventilation member 2 including the upper piece 2a, the folded piece 2b, the extended piece 2d, the hanging piece 2e, the bottom plate 2f, the water return piece 2c, and the connection piece 2h connected to the lower ventilation suppressing piece 1c, further excellent workability can be realized.

[0054] Further, according to this embodiment, by having the watertight member 3 between the lower ventilation suppressing piece 1c and the connection piece 2h, it is possible to prevent rainwater from entering the indoor space from the connection portion between the water return member 1 and the ventilation member 2.

[0055] Further, according to this embodiment, by having the heat-expanded member 4 provided on the upper ventilation suppressing piece 1b and closing the space 5c by expanding due to heat, when the ventilation device A receives the heat of the flame, it is possible to completely block the blowing of the flame into the indoor space.

[0056] Further, according to this embodiment, by providing the ventilation hole 2k in the extended piece 2d that is connected to the upper piece 2a and extends downward from the upper piece 2a, the ventilation hole 2k can be made invisible from under the eaves, and the design can be improved.

[0057] Further, according to this embodiment, by configuring the ventilation device A with the water return member 1 and the ventilation member 2, the number of parts can be reduced as compared with Patent Document 1.

[0058] In addition, in the present embodiment, the watertight member 3 and the heat insulating foam member 4 are provided. However, the present invention is not limited to this, and either one or both of the watertight member 3 and the heat insulating foam member 4 may not be provided.

[0059] Further, in the present embodiment, the water return member 1 is fixed to the outer wall side wall surface 100 and the ventilation member 2 is fixed to the support member 101. However, the present invention is not limited to this. After connecting the lower ventilation suppressing piece 1c of the water return member 1 and the connecting piece 2h of the ventilation member 2, the upper piece 2a and the folded piece 2b of the ventilation member 2 may be fixed to the support member 101. In this case, the screw 102 can be made unnecessary and the operation of fixing the water return member 1 to the outer wall side wall surface 100 can be made unnecessary.

[0060] Further, in the present embodiment, the ventilation member 2 is provided with the extending piece 2d and the hanging piece 2e. However, the present invention is not limited to this. A ventilation piece having a ventilation hole bent downward at a right angle from the upper piece 2a may be provided, and the lower end of the ventilation piece and the lower end of the side piece 2g may be connected by a bottom piece.

[0061] (Embodiment 2) <Configuration of Ventilation Device> The configuration of the ventilation device B according to Embodiment 2 of the present invention will be described in detail below with reference to FIGS. 6 to 8.

[0062] The ventilation device B is provided between the outer wall side wall surface 100 of the building and the vertical plate 104 supported by the support member 101 provided at a distance from the outer wall side wall surface 100, and ventilates the outside air and the indoor space. The ventilation device B is composed of a water return member 6, a ventilation member 7, and a heat insulating foam member 8. In FIG. 7, the description of the heat insulating foam member 8 is omitted.

[0063] The water return member 6 has an inverted L-shaped cross-sectional shape and is connected to the ventilation member 7.

[0064] Specifically, the water return member 6 includes a connecting piece 6a and a lower ventilation suppressing piece 6b.

[0065] The connecting piece 6a is fixed to the abutting piece 7f of the ventilation member 7 by fixing means such as double-sided tape (not shown).

[0066] The lower ventilation suppressing piece 6b is bent at a right angle to the left from the lower end of the connecting piece 6a and extends to the left, and faces the upper ventilation suppressing piece 7g of the ventilation member 7.

[0067] The ventilation member 7 is fixed to the support member 101 provided at a distance from the outer wall side wall surface 100 by screws 105, and is connected to the water return member 6. Note that the ventilation member 7 may be fixed to the support member 101 by other fixing means such as nails other than the screws 105.

[0068] Specifically, the ventilation member 7 includes an upper piece 7a, a folded-back piece 7b, a water return piece 7c, a ventilation piece 7d, a bottom piece 7e, an abutting piece 7f, an upper ventilation suppressing piece 7g, and a water return piece 7h. Here, the upper piece 7a and the folded-back piece 7b constitute a fixing piece.

[0069] The upper piece 7a is provided with a mounting hole 7i for inserting the screw 105.

[0070] The folded-back piece 7b is folded back 180 degrees to the right and above the upper piece 7a from the left end of the upper piece 7a and extends to the right. The folded-back piece 7b is provided with a mounting hole 7j that faces the mounting hole 7i and through which the screw 105 is inserted.

[0071] The water return piece 7c is connected to the folded-back piece 7b and is bent at a right angle downward from the right end of the folded-back piece 7b and hangs down. The water return piece 7c is disposed between the ventilation hole 7k and the abutting piece 7f and faces the ventilation hole 7k with a gap therebetween.

[0072] The ventilation piece 7d is bent downward at a right angle from the right end of the upper piece 7a and hangs down, and is spaced apart from and faces the water return piece 7c. A plurality of ventilation holes 7k, which are elongated holes along the extending direction, are arranged in parallel along the longitudinal direction of the ventilation device B (the depth direction in FIG. 6). The ventilation holes 7k face the vertical plate 104.

[0073] The bottom piece 7e extends from the lower end of the ventilation piece 7d toward the outer wall side wall surface 100, connects the lower end of the ventilation piece 7d and the lower end of the contact piece 7f, and constitutes the bottom surface of the ventilation device B.

[0074] The contact piece 7f is in contact with the outer wall side wall surface 100.

[0075] The upper ventilation suppressing piece 7g is bent at a right angle to the left from the upper end of the contact piece 7f and extends to the left.

[0076] The water return piece 7h is bent downward at a right angle from the left end of the upper ventilation suppressing piece 7g and hangs down. The water return piece 7h is disposed between the contact piece 7f and the support member 101, and is spaced apart from and faces the contact piece 7f.

[0077] The heat-expanded foam member 8 is long and is adhered to the upper surface of the upper ventilation suppressing piece 7g of the ventilation member 7 by a double-sided tape or the like along the longitudinal direction of the ventilation device B. The heat-expanded foam member 8 is a non-combustible volume-expanding material and thermally expands when receiving the heat of a flame.

[0078] In the ventilation device B, a space 9a surrounded by the ventilation piece 7d, the water return piece 7c, and the bottom piece 7e is formed. Further, in the ventilation device B, a space 9b surrounded by the connection piece 6a, the water return piece 7c, the contact piece 7f, the upper ventilation suppressing piece 7g, the lower ventilation suppressing piece 6b, and the support member 101 is formed. Furthermore, in the ventilation device B, a space 9c surrounded by the upper ventilation suppressing piece 7g, the outer wall side wall surface 100, and the support member 101 is formed.

[0079] The space 9a communicates with the outside air through the ventilation hole 7k. The space 9b communicates with the space 9a through the gap between the lower ventilation suppressing piece 6b and the water return piece 7c. The space 9c communicates with the space 9b through the gap between the water return piece 7h and the support member 101. The space 9c communicates with the indoor space.

[0080] In the ventilation device B having the above configuration, the ventilation path for ventilating the outside air and the indoor space is formed by the ventilation hole 7k, the gap between the bottom piece 7e and the water return piece 7c, the gap between the water return piece 7c and the lower ventilation suppressing piece 6b, and the gap between the water return piece 7h and the support member 101.

[0081] <Manufacturing Method and Mounting Method of Ventilation Device> Regarding the manufacturing method and mounting method of the ventilation device B according to the second embodiment of the present invention, it will be described in detail below with reference to FIG. 9.

[0082] In FIG. 9, FIG. 9(a) shows the step of attaching the ventilation device B to the support member 101, and FIG. 9(b) shows the completed state of the ventilation device B.

[0083] First, the ventilation device B is generated by fixing the connecting piece 6a of the water return member 6 to the opposite surface of the facing surface with the outer wall side wall surface 100 of the abutting piece 7f of the ventilation member 7.

[0084] Next, a long heat foam member 8 is attached along the longitudinal direction of the ventilation device B to the upper surface of the upper ventilation suppressing piece 7g of the ventilation member 7 by means of a double-sided tape or the like (not shown).

[0085] Next, the ventilation member 7 is fixed to the support member 101 by screws 105 inserted through the mounting holes 7i and 7j of the ventilation member 7 of the ventilation device B (FIG. 9(a)).

[0086] Thereby, the ventilation device B is completed (FIG. 9(b)).

[0087] Note that the thermal foaming member 8 is not limited to being provided on the upper surface of the upper ventilation suppressing piece 7g, and may be provided on the upper surface of the lower ventilation suppressing piece 6b, the upper surface of the bottom plate 7e, or the left surface (the surface facing the support member 101) of the water return piece 7h. Further, the thermal foaming member 8 is not limited to being provided singly, and may be provided on any two or three or all of the upper surface of the lower ventilation suppressing piece 6b, the upper surface of the bottom plate 7e, the upper surface of the upper ventilation suppressing piece 7g, and the left surface of the water return piece 7h.

[0088] <Operation of the ventilation device> The operation of the ventilation device B according to Embodiment 2 of the present invention will be described in detail below.

[0089] In the ventilation device B, as indicated by the arrow line S2 in FIG. 6, outside air ventilates through the ventilation hole 7k of the ventilation piece 7d into the space 9a, and ventilates through the space 9b via the gap between the bottom plate 7e and the water return piece 7c and the gap between the water return piece 7c and the lower ventilation suppressing piece 6b, and ventilates through the space 9c via the gap between the water return piece 7h and the support member 101, thereby performing ventilation between the outside air and the indoor space.

[0090] During a storm, rainwater that has entered the space 9a through the ventilation hole 7k hits the water return piece 7c and either falls or adheres to the water return piece 7c, and thus does not reach the space 9b. Thereby, it is possible to prevent a part of the rainwater that has entered the space 9a through the ventilation hole 7k from entering the indoor space.

[0091] Rainwater that cannot be prevented from entering by the water return piece 7c hits the lower surface of the lower ventilation suppressing piece 6b and either falls or adheres to the lower surface of the lower ventilation suppressing piece 6b. Also, rainwater that cannot be prevented from entering by the water return piece 7c causes a swirling flow of ventilation due to the lower ventilation suppressing piece 6b, the contact piece 7f, and the bottom plate 7e, and generates a pressure loss in the opposite direction of this flow with respect to the flow attempting to enter the space 9b. Thereby, it is possible to reduce the blowing of rainwater that cannot be prevented from entering by the water return piece 7c into the building interior.

[0092] Rainwater that cannot be prevented from entering by the lower ventilation suppression piece 6b hits the contact piece 7f and bounces back. At this time, the rainwater that hits the contact piece 7f and bounces back in the direction of the support member 101 hits the water return piece 7h and falls or adheres to the water return piece 7h. In addition, rainwater that cannot be prevented from entering by the lower ventilation suppression piece 6b forms a vortex in the ventilation due to the contact piece 7f, the upper ventilation suppression piece 7g, and the water return piece 7h, and causes a pressure loss in the flow in the opposite direction of this flow with respect to the flow trying to enter the space 9c. Thereby, it is possible to reduce the blowing of rainwater that cannot be prevented from entering by the lower ventilation suppression piece 6b into the building interior.

[0093] When the ventilation device B receives the heat of the flame, the heat-expanded foam member 8 that has received the heat of the flame expands thermally and closes the space 9c, thereby closing the gap between the outer wall side wall surface 100 and the support member 101 and closing the ventilation path indicated by the arrow line S2 in FIG. 6, and completely blocking the blowing of the flame into the indoor space. Thereby, the ventilation device B can exhibit excellent fire prevention performance.

[0094] As described above, since the ventilation device B can be attached under the eaves only by the screw 105, further excellent workability can be realized.

[0095] Thus, according to the present embodiment, by forming a ventilation path that ventilates the outside air and the indoor space through the ventilation hole 7k, the gap between the bottom piece 7e and the lower end of the water return piece 7c, the gap between the lower end of the water return piece 7c and the left end of the lower ventilation suppression piece 6b, and the gap between the water return piece 7h and the support member 101, high waterproof performance can be obtained and excellent workability can be realized.

[0096] Further, according to the present embodiment, by configuring the ventilation device B with a water return member 6 including a connection piece 6a connected to the contact piece 7f and a lower ventilation suppression piece 6b, and a ventilation member 7 including the contact piece 7f, an upper ventilation suppression piece 7g, an upper piece 7a, a folded piece 7b, a ventilation piece 7d, a bottom piece 7e, a water return piece 7h, and a water return piece 7c, a waterproof member can be made unnecessary.

[0097] Further, according to the present embodiment, by having the heat-expanded member 8 that is provided on the upper ventilation suppressing piece 7g and closes the space 9c by expanding due to heat, when the ventilation device B receives the heat of the flame, the blowing of the flame into the indoor space can be completely blocked.

[0098] Further, according to the present embodiment, by providing the ventilation hole 7k in the ventilation piece 7d that is connected to the upper piece 7a and extends downward from the upper piece 7a, the ventilation hole 7k can be made invisible from under the eaves, and the design property can be improved.

[0099] Further, according to the present embodiment, by configuring the ventilation device B with the water return member 6 and the ventilation member 7, the number of parts can be reduced as compared with Patent Document 1.

[0100] Note that, in the present embodiment, the heat-expanded member 8 is provided, but not limited thereto, and the heat-expanded member 8 may not be provided.

[0101] Further, in the present embodiment, the ventilation piece 7d is provided in the ventilation member 7, but not limited thereto, and an extended piece having a ventilation hole that is bent downward from the right end of the upper piece 7a and extends downward so as to gradually approach the vertical plate 104, and a hanging piece hanging downward from this extended piece may be provided, and the lower end of this hanging piece and the lower end of the contact piece 7f may be connected by a bottom piece.

[0102] The present invention is not limited to the types, arrangements, numbers, etc. of the members described in the above embodiments, and it goes without saying that the components can be appropriately changed without departing from the gist of the invention, such as appropriately substituting components having the same functions and effects.

[0103] Specifically, in the above-described Embodiment 1 and Embodiment 2, the ventilation device is formed by connecting two members, but not limited thereto, and the ventilation device may be formed by one member.

Industrial Applicability

[0104] The present invention is suitable for a ventilation device provided between an outer wall side wall surface of a building and a vertical plate such as a windbreaker, a nose concealer, or a curtain board supported by a support member provided at a distance from the outer wall side wall surface.

Explanation of Signs

[0105] A Ventilation device B Ventilation device 1 Water return member 1a Contact piece 1b Upper ventilation suppression piece 1c Lower ventilation suppression piece 1d Water return piece 2 Ventilation member 2a Upper piece 2b Folded-back piece 2c Water return piece 2d Extended piece 2e Hanging piece 2f Bottom piece 2g Side piece 2h Connection piece 2i Mounting hole 2j Mounting hole 2k Ventilation hole 3 Watertight member 4 Heat foam member 5a Space 5b Space 5c Space 6 Water return member 6a Connection piece 6b Lower ventilation suppression piece 7 Ventilation member 7a Upper piece 7b Folded-back piece 7c Water return piece 7d Ventilation piece 7e Bottom piece 7f Contact piece 7g Upper ventilation suppression piece 7h Water return piece 7i Mounting hole 7j Mounting hole 7k Ventilation hole 8 Heat foam member 9a Space 9b Space 9c Space 100 Outer wall side wall surface 101 Support member 102 Screw 103 Screw 104 Vertical plate 105 Screw

Claims

1. A ventilation device provided between an outer wall side wall surface of a building and a vertical plate supported by a support member provided at a distance from the outer wall side wall surface, comprising: a contact piece that contacts the outer wall side wall surface; an upper ventilation suppressing piece connected above the contact piece; a lower ventilation suppressing piece connected below the contact piece; a fixing piece fixed to the support member; a ventilation piece having a ventilation hole for ventilation, connected to the fixing piece and extending downward from the fixing piece; a bottom piece extending from the lower end of the ventilation piece toward the outer wall side wall surface and constituting a bottom surface; a first water return piece connected to the upper ventilation suppressing piece and facing the contact piece; a second water return piece connected to the fixing piece and disposed between the ventilation hole and the contact piece; and having: The ventilation path for ventilating the outside air and the indoor space is formed by the ventilation hole, the gap between the bottom piece and the second water return piece, the gap between the second water return piece and the lower ventilation suppressing piece, and the gap between the first water return piece and the support member. A ventilation device characterized by the above.

2. A water return member including the contact piece fixed to the outer wall side wall surface, the upper ventilation suppressing piece, the lower ventilation suppressing piece, and the first water return piece; A ventilation member including the fixing piece, the ventilation piece, the bottom piece, the second water return piece, a side piece connected to the bottom piece, and a connecting piece connected to the side piece and also connected to the lower ventilation suppressing piece; composed of: The ventilation device according to claim 1, characterized by the above.

3. A water return member including a connecting piece connected to the contact piece and the lower ventilation suppressing piece; A ventilation member including the contact piece, the upper ventilation suppressing piece, the fixing piece, the ventilation piece, the bottom piece, the first water return piece, and the second water return piece; composed of: The ventilation device according to claim 1, characterized by the above.

4. Provided on at least any one of the upper surface of the upper ventilation suppressing piece, the upper surface of the lower ventilation suppressing piece, the upper surface of the bottom piece, and the facing surface of the first water return piece with respect to the support member, and having a non-combustible volume expansion material that closes the ventilation path by expanding due to heat. The ventilation device according to any one of claims 1 to 3, characterized by the above.

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