JPH0334579Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] This invention relates to a ventilation system installed on the outer wall of a building such as a residence.

[Background technology]

Conventionally, as shown in FIG.
is installed to provide attic ventilation or indoor ventilation. As shown in FIG. 4, the ventilation girder 53 has a plurality of downward walls 54a formed on a gara component plate 54, and a ventilation hole 55 is provided in each downward wall 54a. A large number of openings 57 are arranged vertically in an exterior plate 56 of the outer wall 51, and a ventilation box 58 is provided in each opening 57.
are fitted. The ventilation box 58 has an open front and top surface as shown in FIG.
It is fixed at Reference numeral 59 denotes a mesh body, which is provided between the ventilation hole 53 and the exterior plate 56 and has waterproof and insect-proof functions.

According to this ventilation gate, since a ventilation gate 53 having a downward wall 54a and a ventilation box 58 are provided, the intrusion path of the outside air is curved to some extent, and rainwater is prevented from entering together with the outside air. The net body 59 also provides a waterproof effect.

However, during strong winds, the entry route may be bent and the net 59
However, as shown by arrow a, there is a problem in that rainwater enters along with the outside air.

Therefore, a proposal was made to provide a damper inside the ventilation box that rotates due to wind pressure and close the opening of the ventilation box during strong winds (Utility Application No. 62-83490). According to this, the blowing of rainwater is almost eliminated.

However, since a gap is formed between the damper and the periphery of the opening on the top surface of the ventilation box, it is impossible to prevent rainwater from entering through this gap, resulting in a problem that the prevention of rainwater intrusion is incomplete.

[Purpose of invention]

The purpose of this invention is to provide a ventilation system that can reliably prevent rainwater from blowing in during strong winds.

[Disclosure of invention]

The ventilation system of this invention includes a ventilation box that has a stopper at the boundary between the front space and the rear space and has openings in the front wall and the upper wall of the rear space that open to the outdoors and indoors, respectively, and The pieces are rotatably supported around a substantially horizontal axis along the upper edge of the boundary portion, and rotated rearward due to the incoming wind having a predetermined wind pressure or more, and each piece engages with the upper wall and the stopper, thereby causing the upper The damper has an L-shaped cross section and closes the opening in the wall and the boundary.

According to the configuration of this invention, since a damper is provided that closes when an incoming wind has a predetermined wind pressure or more, the damper closes during strong winds, thereby preventing rainwater from entering. Moreover, the damper is L-shaped,
Since each piece closes the opening and border on the top surface of the ventilation box, double waterproofing is achieved and watertightness is improved during strong winds accompanied by rain.

Embodiment An embodiment of this invention will be described based on FIGS. 1 and 2. This ventilation device is a front space 1a
A ventilation box 1 has a stopper 3 at the boundary 2 between the front and rear spaces 1b, and openings 4 and 5 opened to the outdoors and indoors in the upper walls 1d of the front and rear spaces 1b, respectively. Boundary part 2
It is rotatably supported around a substantially horizontal support shaft P along the upper edge, and is rotated rearward by the incoming wind of a predetermined wind pressure or more, and each piece 6a, 6b engages with the upper wall 1d and the stopper 3, respectively. The damper 6 has an L-shaped cross section and closes the opening 5 in the upper wall and the boundary 2.

The ventilation box 1 is fitted into an opening provided in the exterior material 7a of the outer wall 7. The ventilation box 1 is fixed at a flange 1c on the front periphery with fixing devices (not shown) such as wood screws. The ventilation box 1 may be provided alone, or a large number of ventilation boxes 1 may be arranged vertically or horizontally as in the example shown in FIG. A ventilation rack 8 and a mesh body 9 are arranged on the outdoor side of the ventilation box 1. The ventilation rack 8 has downward walls 8a formed in multiple stages, and a ventilation opening 10 formed in each downward wall 8a. Note that the ventilation hole 8 and the mesh body 9 do not necessarily need to be provided.

The support shaft P of the damper 6 is attached to the ventilation box 1 at both ends. Damper 6 is in the first position when the wind pressure is small.
one piece 6a so that the open state shown in the figure is maintained.
A weight 11 is provided at the. Note that instead of the weight 11, a spring member or the like may be used to bias the damper 6 toward the opening side. The damper 6 is made of a metal plate, a resin molded product, or the like.

The stopper 3 consists of a forward facing step formed on the lower wall of the ventilation box 1, and a watertight material 12 is provided on the front surface. A watertight material 13 is also provided around the periphery of the opening 5 in the upper wall of the ventilation box 1. These watertight materials 1
2 and 13 are made of soft rubber, foamed resin, or the like.

The installation location of this ventilation device is not limited to the location of the ventilation pane 53 in FIG. 3, but may be placed anywhere on the outer wall 7. The outer wall referred to here refers to the outer peripheral part of a building, and may be a cloth foundation, or a curtain part between upper and lower floor outer wall panels of a building.

According to the configuration of this embodiment, when there is no wind or weak wind, the rear piece 6a of the damper 6 hangs down due to the weight of the weight 11, and the opening 3 of the upper wall 1a of the ventilation box 1
is released (Figure 1). The front piece 1b of the damper 6 waits upward and releases the boundary part 2. The rear piece 1a is located at the boundary 2,
Since the area is small, the boundary portion 2 is in an open state. Therefore, natural ventilation is possible. At this time, the wind pressure is weak, so even when it rains, the front ventilation opening 8 and the bending path of the ventilation box 1,
In addition, the mesh body 9 sufficiently prevents rainwater from blowing into the indoor space (for example, the attic). Further, even when the damper 1 is in the released state, the piece 6a serves as a water return, preventing water from leaking indoors.

During strong winds, the damper 6 rotates backward against the weight of the weight 11 due to wind pressure, causing each piece 6a of the damper 6 to
6b closes the opening 3 and border 2 of the ventilation box 1 (FIG. 2). Therefore, even if it is accompanied by rain, rainwater can be prevented from blowing in. At this time, since the damper 6 is L-shaped and is doubly waterproofed by each piece 6a, 6b, watertightness is good. Watertightness is also improved because the watertight materials 12 and 13 are provided in close contact with each piece 6a and 6b of the damper 6. Therefore, watertightness is ensured during strong winds and rain.

When there is a lot of rain due to strong winds, rainwater blown in from the ventilation opening 8 etc. flows down the outer surface of the exterior material 7a of the outer wall 7, but this rainwater travels along the inner surface of the ventilation box 1 and enters the indoor side through the opening 5. This can also be prevented by the damper 6.

In the embodiment described above, the stopper 3 is formed by a stepped portion of the ventilation box 1, but the stopper 3 may be a projecting wall or the like provided within the ventilation box 1. The stopper 3 may be provided only in a part of the boundary portion 2, but if it is provided continuously around the entire circumference of the boundary portion 2, watertightness is further improved. The angle between both pieces 6a and 6b of the damper 6 is
It may be less than 90° or more than 90°.

[Effect of idea]

The ventilation system of this invention is provided with a damper that closes when an incoming wind has a predetermined wind pressure or higher, so that when strong winds occur, the damper closes to prevent rainwater from entering. Moreover, the damper is L-shaped, and each piece closes the opening and border on the top surface of the ventilation box, so that double waterproofing is achieved.
This has the effect of improving watertightness during strong winds accompanied by rainfall.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of this invention, Fig. 2 is an explanatory diagram of its operation, Fig. 3 is a front view of a building equipped with a conventional ventilation gate, and Fig. 4 is a sectional view of the ventilation gate. FIG. 5 is a perspective view of the ventilation box. 1...Ventilation box, 1a...Front space, 1b
...Rear space, 1d...Top wall, 3...Stopper,
4, 5...Opening, 6...Damper, 6a, 6b...
Piece.

Claims (1)

[Scope of utility model registration request] a ventilation box having a stopper at the boundary between the front space and the rear space and having openings in the front and upper walls of the rear space that open to the outdoors and indoors, respectively;
It is rotatably supported within the ventilation box around a substantially horizontal axis along the upper edge of the boundary portion, and rotates backwards when the incoming wind exceeds a predetermined wind pressure, so that each piece engages the upper wall and the stopper. A ventilation device comprising an L-shaped cross-section damper which together closes the opening in the upper wall and the boundary.