JP5905406B2 - Ventilation hood - Google Patents

Description

  The present invention relates to a ventilation hood installed on a wall surface of a building.

  Since the ventilation hood is installed outside the house, there is a demand for a structure that prevents wind and rain from entering the room. Under such circumstances, as described in Japanese Patent No. 3414116, openings are provided on the left and right side surfaces and the lower surface of the hood portion as a ventilation hood having fins in the ventilation opening portion and improved outside wind resistance and rain resistance. A structure in which a plurality of fins for guiding the exhaust flow in the direction away from the wall in the direction perpendicular to the wall surface is formed in the opening on the side surface is shown. Further, a wind and rain prevention plate is provided on the front side of the hood as disclosed in Japanese Patent Application Laid-Open No. 2005-043004, a rectangular cylinder provided in the direction of the back side wall is provided, and a plurality of fins are formed on the outer peripheral surface of the upper, lower, left and right surfaces A structure in which a vent is formed has been proposed.

Japanese Patent No. 3414116 JP 2005-043004 A

  In the conventional structure as shown in Patent Documents 1 and 2, rainwater that has fallen on the top surface of the hood flows to the hood surface, and streaks on the hood surface and wall contamination due to rainwater flowing along the walls are likely to occur. Met. Further, depending on the environmental conditions such as the wind direction and wind speed, there is a problem that rainwater enters the inside of the hood or the inside of the ventilation duct from the gap between the plurality of fins. Also, when fixing the flange and hood during construction, the screw fixing parts on the left and right sides of the hood are located close to the wall surface and the screw is tightened perpendicularly to the side of the hood. Are difficult to see, and the walls are obstructive and the screws are difficult to tighten. Further, since the hood is fixed only with the screws provided on the left and right, it is necessary to improve the corrosion resistance of the screws so that the screws are not corroded and the hood part is dropped. In the configuration of Patent Document 2, a mounting bracket is provided on the top of the hood, and the tip of the mounting bracket is inserted into the housing to prevent the hood from falling. However, the mounting bracket is exposed to the outside from the hood. Therefore, it was necessary to improve the corrosion resistance so as not to corrode the mounting bracket itself. Furthermore, depending on the shape of the upper surface of the hood, birds and other objects may fly to form a nest, and because of this nest, the gap between the fins may be blocked and ventilation may be insufficient, or feces may cause the walls and hood to There was a problem of soiling.

  The present invention has been made in view of the above, and an object of the present invention is to obtain a ventilation hood that improves the fixing structure of the hood, has good workability, and that rainwater does not easily enter and the appearance does not get dirty.

In order to solve the above-described problems and achieve the object, the present invention provides a duct connection port for connecting a duct for ventilation, a flat flange having the duct connection port, an outer periphery and one surface of the flange. A hood provided with a ventilation hole for covering the side; and a tubular part protruding from the flange surface of the hood side end of the duct connection port provided in the flange; A wind / rain prevention plate is provided between the air vent and the tubular portion, and the area of the wind / rain prevention plate is smaller than the area of the air vent .

  According to this ventilation hood, it is possible to obtain a ventilation hood in which wind and rain hardly enter the ventilation duct inside the hood.

1 is an exploded perspective view of a ventilation hood according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view showing a hood part component configuration. FIG. 3 is a perspective view showing a top plate joint portion of the hood portion. FIG. 4 is a perspective view showing the inside of the hood. FIG. 5 is a perspective view showing a state in which the hood is fixed to the flange. FIG. 6 is a partial perspective view showing the engaging portion between the flange and the hood. FIG. 7 is a sectional view in which a flange and a hood are fixed with screws. FIG. 8 is a cross-sectional view of the ventilation hood and a flow of water. FIG. 9 is a perspective view showing components in which a hood hooking portion, a hood fixing plate, a reverse attachment prevention plate, and a wind / rain prevention plate are integrally formed. FIG. 10 is a side view in which an inclined plate is attached to the top surface of the hood as a bird's nest countermeasure.

  Embodiments of a ventilation hood according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1.
First, the structure of the ventilation hood which concerns on this invention is demonstrated. 1 is an exploded perspective view of a ventilation hood according to Embodiment 1 of the present invention as viewed obliquely from above.

  In FIG. 1, a ventilation hood 50 is attached to an opening on the outdoor side of a hole (not shown) formed in a wall separating the outdoor and indoor of a building, and exhausts indoor air from the indoor to the outdoor. It is a member provided at the end of a duct that takes in outside air from the inside to the inside and supplies air. The ventilation hood 50 connects a hood 1 that covers an opening for ventilation, a rectangular flange 2 that is formed in a flat plate shape for attaching the ventilation hood 50 to a building outer wall, and a ventilation duct that is connected to ventilation equipment. It is comprised from the duct connection port 3 connected to. The flange 2 is formed with an edge 2a whose outer periphery is bent about 3 to 5 mm on the wall surface side, and a duct connection port 3 is disposed in the center of the flange 2 so as to penetrate the surface 2b of the flange 2. Has been. The duct connection port 3 is attached to the surface 2b of the flange 2 on the side of the hood 1 so that the end 3a protrudes, and the wall surface side end 3b on the back side of the flange 2 can be connected to a ventilation duct connected to the ventilation equipment. It has become. An end portion 3a of the duct connection port 3 is formed so as to protrude in a collar shape on the outer periphery of the duct connection port. This prevents the outside wind or rain water that has entered the inside of the hood 1 from being reflected on the surface 2 b of the flange 2 and entering the tubular portion of the duct connection port 3. The flange 2 and the outer wall are fixed to the outer wall of the building with fixing screws through mounting holes (not shown) provided near the left and right side surfaces. The ventilation duct is mainly a pipe formed of a steel plate or resin, and a cylindrical duct connection port 3 is inserted into the pipe for connection. In addition, the gap between the outer peripheral edge 2a of the flange 2 and the wall is located on the inner periphery of the edge 2a so that rainwater enters and the rain duct does not enter the wall through the gap between the ventilation duct and the hole provided in the wall. Sealing is ensured by applying a sealing material or caulking between the outer wall and the wall surface.

  Next, the configuration of the hood 1 will be described. FIG. 2 is a perspective view showing the configuration of the hood 1, and FIG. 3 is a perspective view showing an assembled state in which the top plate 19 of the hood 1 is joined.

  As shown in FIG. 2, the hood 1 has a substantially box shape, and the hood front surface 1 c and the left and right hood side surfaces 1 a and 1 b are integrally formed by a single plate of the front plate 18 (in the description below, The left and right mean the position of the ventilation hood as viewed from the outside in the building installation state). The hood side surfaces 1a and 1b are provided with a vent hole 7, and fins 8 are cut and raised at the opening thereof. Further, the top plate 19 constituting the hood top surface 1d and the bottom plate 20 constituting the hood bottom surface 1f are formed by separate parts. As shown in FIGS. 2 and 3, the hood side surfaces 1a and 1b of the front plate 18 are provided with joining pieces 25 for joining the top plate 19 and the bottom plate 20 to the upper and lower portions. 20 is integrated at the joint 21 by spot welding or the like. The top plate 19 prevents intrusion of outside wind and rainwater from above the ventilation hood 50, and the bottom plate 20 prevents intrusion of outside wind and rainwater from below the ventilation hood 50.

  Thus, since the front plate 18, the top plate 19, and the bottom plate 20 of the ventilation hood 1 are formed as separate members and joined at the top and bottom of the front plate 18, there are no joints on the hood front surface 1c and the hood side surfaces 1a and 1b. The rainwater that has entered the hood 1 to be described later can be discharged well without staying on the way. Moreover, the joining part 21 does not appear in the hood front surface 1c and the hood side surfaces 1a and 1b which are important as the design of the hood 1, and the design is good.

  FIG. 4 is a perspective view of the inside of the hood 1. As shown in FIGS. 1 to 4, the plurality of fins 8 of the air vent 7 guide the airflow in a direction away from the wall so that the tips of the fins 8 are directed toward the flange 2 in the direction of the flange 2 when viewed from the top surface of the hood. It is cut and raised (see FIG. 7). The front plate 18 is formed in an R shape so that the hood front surface 1c swells, and is connected to the hood side surfaces 1a and 1b. Moreover, the ventilation hole 11 for ventilation | gas_flowing is provided in the edge part by the side of the food | hood front surface 1c of the baseplate 20. FIG. The vent 11 has a half-moon shape formed by a gap between the R portion of the front plate 18 and the bottom plate 20. Further, the vent 11 supplements the ventilation air volume from the vent 7 provided in the hood side surfaces 1a and 1b, and functions as a drain in the top plate 19 and the hood 1 described later.

  Next, fixation of the flange 2 and the hood 1 will be described with reference to FIGS. FIG. 5 is a perspective view showing a state in which the hood 1 is hooked on the flange 2 during construction, and FIG. 6 shows a relationship between the tongue-like portion 13 provided on the hood 1 side and the hook portion 4 provided on the flange 2 side. It is a perspective view. FIG. 7 is a cross-sectional view showing a case where the hood 1 and the hood fixing plate 5 provided on the flange 2 side are engaged with each other with screws 22. The hood 1 is fixed to the flange 2 so as to be detachable, and has a structure in which periodic maintenance such as cleaning of the air vent 7 can be performed.

  In FIG. 1, a hooking portion 4 and a hooking hole 4 a for temporarily supporting the hood 1 are provided in the upper portion of the flange 2 in the building installation state. The hook portion 4 is provided on the surface 2b of the flange 2 as a pair on the left and right sides, and projects vertically from the surface 2b to the hood 1 side. On the other hand, as shown in FIG. 4, tongues 13 are provided on the inner side of the hood 1 on the left and right sides of the hood upper surface 1 d at positions corresponding to the hooks 4 provided on the flange 2. This tongue-shaped portion 13 is formed in a tongue shape toward the hood bottom surface 1f side at the flange 2 side end portion of the joining piece 25 provided on the upper portions of the hood side surfaces 1a and 1b. The hooking hole 4a of the hooking portion 4 is formed as a square hole that is several millimeters larger than the tongue-like portion 13, and is shaped so that the tongue-like portion 13 can be easily inserted.

  When the hood 1 is fixed to the flange 2, as shown in FIGS. 5 and 6, the tongue 13 provided on the inner side of the hood 1 is hooked in the hooking hole 4 a of the flange 2, so that the hood 1 is obliquely upward from the flange 2. And the tongue 13 is inserted into the hooking hole 4a. The flange 2 temporarily holds the hood 1 by lowering the lower end of the hood 1 and bringing it into contact with the flange 2 side. This structure also has an effect of preventing temporary dropping until the fixing with the screw 22 described later, and preventing the hood 1 from dropping if the fixing by the screw 22 is inadequate.

  As shown in FIG. 1, on the left and right sides of the surface 2b of the flange 2, a hood fixing plate 5 for fixing the hood 1 is erected on the hood 1 side perpendicularly to the surface 2b, and the tip portion thereof is a hood fixing hole 5a. And bent toward the inside of the flange 2. In order to fix the hood 1 to the hood fixing plate 5, a recessed screw mounting surface 10 having a bottom surface at the end of the hood 1 on the flange 2 side of the vent 7 so as to match the tip of the hood fixing plate 5. Is provided. The screw mounting surface 10 is inclined in the same manner as the distal end bending angle of the hood fixing plate 5, and a screw hole 10 a serving as a fastening member through hole is provided at the center thereof. As shown in FIG. 7, with the flange 2 normally holding the hood 1, the screw hole 10 a of the hood 1 and the hood fixing hole 5 a of the flange 2 are coincident with each other, and are fixed to the left and right portions with screws 22. . The screw mounting surface 10 of the hood 1 is directed toward the front side of the hood due to the inclination. When the hood 1 is fixed with the screws 22, the screw holes 10a are easily recognized and workability is good. In addition, the screw tightening work from the side is possible, but it is possible to work from the diagonally forward side, so it is easy to tighten the screwdriver vertically against the screw and close to the left and right sides of the hood. Even if there are overhangs on the wall, the screws can be easily tightened.

  A reverse attachment prevention plate 6 is provided at a position facing the pair of left and right hooks 4 at the lower part of the flange 2. The reverse attachment prevention plate 6 protrudes perpendicularly from the surface 2b of the flange 2 in the direction of the hood 1 side. Further, the distance from the top surface 1d of the hood to the hooking portion 4 and the distance from the bottom surface 1f of the hood to the reverse attachment preventing plate 6 are arranged to be substantially equal. When the hood 1 is to be attached to the flange 2 in the upside down position, the reverse attachment prevention plate 6 interferes with the tongue 13 on the inside of the hood and the reverse attachment prevention plate 6, and the hood 1 temporarily attaches to the flange 2. That the screw hole 10a of the hood 1 and the position of the hood fixing hole 5a of the flange 2 are shifted, and the reverse mounting of the hood 1 is prevented.

  Next, a structure in which outside wind and rainwater do not enter the cylindrical portion of the duct connection port 3 inside the hood will be described. 1 and 5, a wind and rain prevention plate 9 is provided between the left and right sides of the cylindrical duct connection port 3 protruding in the center of the flange 2 and the ventilation port 7 of the hood 1 in parallel with the opening surface of the ventilation port 7. Is provided. The wind and rain prevention plate 9 is protruded vertically from the surface 2b of the flange 2 toward the hood 1 side. The long square portion 9a on the hood 1 side of the wind and rain prevention plate 9 is approximately 20 to 30 mm in width from the hood 1 side to the flange 2 side, and the vertical length from the hood top surface 1d side to the hood bottom surface 1f side is The inner diameter of the duct connection port 3 is substantially the same.

  FIG. 8 is a cross-sectional view showing a building installation state of the ventilation hood 50. As shown in FIG. 8, the long rectangular portion 9 a of the wind and rain prevention plate 9 is located at the approximate center of the opening surface of the vent hole 7. This is because the ventilation hood 50 is installed in the building, and the inside of the hood 1 is viewed from various directions such as diagonally upward, diagonally downward, or diagonally from the outside of the hood 1 through the gaps of the fins 8 of the vent 7. Is also arranged so that the cylindrical part of the duct connection port 3 is not directly visible. The wind and rain prevention plate 9 functions as a shielding plate so that the outside wind blown from the gaps between the fins 8 does not reach the duct connection port 3 directly, thereby reducing the influence of the outside wind. Further, when it rains, rainwater blown from the gaps between the fins 8 once hits the wind and rain prevention plate, thereby blocking rainwater from entering the tubular portion of the duct connection port 3.

  The hook part 4, the hood fixing plate 5, the reverse attachment prevention plate 6, and the wind / rain prevention plate 9 described above are integrally formed as a mounting plate 12 as shown in FIG. 9. The mounting plate 12 is fixed to the surface 2b of the flange 2 by welding or screwing. By configuring in this way, it is possible to save time and effort to create and manage each part individually and to fix each part to the flange 2 and to prevent misalignment between each part. In addition, the reliability can be improved.

  Next, a structure for draining rainwater collected on the top plate 19 and the bottom plate 20 of the hood 1 will be described. As shown in the cross-sectional view of FIG. 8, the top plate 19 is provided with an inclined portion 17 that descends from the wall surface side to the front surface of the hood 1 c, and the front end portion 15 is lower than the upper end of the front plate 18 of the hood 1. In addition, a drain opening 14 formed by a notch is provided in the approximate center of the tip 15 (see FIG. 2). Further, the bottom plate 20 has a front end portion 16 on the hood front surface 1c side bent upward at a right angle, and is provided with an inclined portion 17a that descends from the hood front surface 1c side toward the flange 2 side. An opening 1g for drainage is formed at the end on the side. The front end portion 16 is provided for the purpose of a shielding wall that prevents outside wind or rainwater blown from obliquely below the hood front surface 1 c side from entering the cylindrical portion of the duct connection port 3. For this reason, the water drained on the bottom surface 20 is drained at the end 1g on the flange 2 side.

  Raindrops 23 that have fallen on the upper surface 1d of the hood flow toward the front surface 1c of the hood by the inclined portion 17 of the top plate 19 and are collected at the tip 15. The collected water is dammed up by the front plate 18, falls to the inside of the hood from the drain opening 14 (water droplet 23 a), flows along the inner side of the front plate 18 as indicated by the arrow, and is formed between the bottom plate 20 and the front plate 18. It discharges outside the hood from the vent 11 provided in the middle. Further, the water droplet 23b entering the inside of the bottom plate 20 flows from the tip end 16 side to the flange 2 side by the inclined portion 17a provided on the bottom plate 20, and passes through the draining plate 24 provided below the flange 2 from the opening 1g. Then, it drops away from the wall (without passing through the wall surface) and falls downward (water drop 23c).

  With the above-described configuration, rainwater drops 23a that have fallen on the upper surface 1d of the hood flow inside the front plate 18 and do not flow on the surface, so that it is possible to prevent the front plate 18 from becoming dirty due to raindrops. In addition, as described above, the front plate 18, the top plate 19, and the bottom plate 20 of the ventilation hood 1 are separated and joined on the top and bottom of the front plate 18, so that the hood front surface 1c, the hood side surfaces 1a and 1b are connected to each other. There are no joints and the surfaces can be flush with each other, and rainwater that has entered the hood 1 can be discharged well without staying on the way. Moreover, it is possible to prevent the water droplet 23 from being transmitted along the wall surface and soiling the wall by dropping the water droplet 23a at a position away from the wall where the ventilation hood 50 is installed. Further, the water droplets 23b blown into the hood 1 can also effectively flow to the flange 2 side and be dropped so as not to be transmitted to the wall by the draining plate 24 (water droplets 23c), thereby preventing wall contamination.

Embodiment 2. FIG.
Next, a configuration in which a small animal such as a bird does not form a nest in the upper part of the ventilation hood 50 will be described. FIG. 10 is a side view in which a bird's nest countermeasure is taken on the top of the ventilation hood 50. In addition, the same code | symbol is attached | subjected to the structure same as Embodiment 1, and description is abbreviate | omitted.

  An inclined plate 26 that is substantially the same as the width of the hood upper surface 1d and is inclined downward from the flange 2 side to the hood front surface 1c side can be attached to a portion that becomes the hood upper surface 1d of the ventilation hood 50. Positioning plates 28 extending downward are provided on both side surfaces of the inclined plate 26, and positioning holes 28a are provided in the positioning plates. Screw holes (not shown) provided at positions corresponding to the positioning holes 28a are provided in the upper portions of the hood side surfaces 1a and 1b, and the positioning plate 28 is fixed to the hood side surfaces 1a and 1b with screws. As shown in FIG. 10, the inclined hole 26 can be slightly slid back and forth on the top plate 19 of the hood 1 by forming the positioning hole 28a in the shape of a long hole, or the position from the wall or It is possible to adjust the protrusion from the fence of the house. The inclined plate 26 is temporarily fixed to the hood side surfaces 1a and 1b with screws, and then the inclined plate 26 is slid to the wall side as shown by the arrows in FIG. Although the angle of the inclined portion 27 from the horizontal plane is approximately 30 °, it is set so as not to impair the appearance design because it prevents a bird from flying and staying on the hood upper surface 1d. As a result, the ventilation hood 50 provided with the inclined plate 26 makes it difficult for birds to fly to the upper surface 1d of the hood and to stop, so that the birds can stop on the ventilation hood 50 and the front plate 18 and walls can be prevented from being contaminated by bird droppings. .

As described above, according to the ventilation hood according to the present invention, it is difficult for rainwater to enter the ventilation duct inside the hood, and the front surface and the wall surface of the hood are less likely to get dirty.

  1 hood, 1a, 1b hood side, 1c hood front, 1d hood top, 1f hood bottom, 1g opening, 2 flange, 2a edge, 2b surface, 3 duct connection port, 3a, 3b end, 4 hook, 4a Hook hole, 5 Hood fixing plate, 5a Hood fixing hole, 6 Reverse mounting prevention plate, 7 Vent, 8 Fin, 9 Storm prevention plate, 9a Long square part, 10 Screw mounting surface (concave part), 10a Screw hole (fastening member) Through hole), 11 Vent, 12 Mounting plate, 13 Tongue, 14 Drain opening, 15 Tip, 16 Tip, 17 Slope, 17a Slope, 18 Front plate, 19 Top plate, 20 Bottom plate, 21 Joint, 22 Screw, 23, 23a, 23b, 23c Water drop, 24 Drain plate, 25 Joint piece, 26 Inclined plate, 27 Inclined portion, 28 Positioning plate, 28a -Decided eyelet, 50 ventilation hood.

Claims (1)

A flat flange having a flange surface attached to the outer wall surface of the building and facing the back surface of the outer wall surface and the opposite direction of the back surface;
Are arranged so as to cover the flange surface at the flange side, a hood having a hood front, left and right hood side hood top, and the hood bottom,
A duct connection port provided to penetrate the flange and connected to the ventilation duct;
A vent hole for ventilation provided on the side surface of the hood;
Between the vent provided on the side surface of the hood and the cylindrical portion, the vent is provided so as to protrude from the flange surface to the front side of the hood from the flange-shaped end portion of the cylindrical portion. A wind and rain prevention plate having a long square portion located substantially in the center of the opening surface of
The duct connection port is provided in the flange so as to protrude from the flange surface toward the front side of the hood, and has a cylindrical part whose end on the front side of the hood is a collar shape,
The area of the long square portion of the wind and rain prevention plate is smaller than the area of the vent , and the vertical length of the long square portion of the wind and rain prevention plate from the top surface of the hood to the bottom surface of the hood is It is the same length as the inner diameter of the duct connection port.
Ventilation hood characterized by that.

Images