JP2016133282A - Roof ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof ventilator for maintaining or improving a ventilation efficiency and sufficiently preventing immersion of rain water into a building.SOLUTION: A continuous type roof ventilator 1 for performing a natural ventilation comprises a roof plate member (3) arranged at an upper part of a ventilation opening (2) of a building; side vent holes (5l, 5r) formed between column members adjacent to each other in a direction where units are continuous; and right and left symmetrical outer plate members (10l, 10r) arranged at outer positions of each of the side vent holes and oppositely faced against each of the side vent holes. A central position of an upper vent hole (15) formed at the upper part of each of the outer plate members is provided with a blow-in preventive plate (21) suspended down toward the roof plate member. In addition, the lower parts of the right and left outer plate members are provided with lower inclination plate members (13, 13) inclined to become low from the lower edge of the side vent hole toward the lower end of the outer plate member.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a roof ventilator provided on a rooftop of a building or the like.

  2. Description of the Related Art Conventionally, a roof ventilator that is provided on an upper portion of a ventilation opening formed on the roof of a building and performs natural ventilation between indoor air and outdoor air is known. FIG. 5 shows a cross-sectional view of a conventional general continuous roof ventilator.

  A conventional roof ventilator 90 shown in FIG. 5 includes a gable roof plate member 92 provided so as to cover an upper portion of a ventilation opening 91 formed on the roof of the building. Are supported by a plurality of column members 93, 93,... Standing on the edge of the opening 91. Side vents 94, 94 are formed between the column members 93, 93 adjacent to each other in the continuous direction of the roof ventilator 90 (in the direction orthogonal to the paper surface in FIG. 5), and further, wind and rain are caused by the side vents. In order not to blow directly into the building from 94, 94, left and right symmetrical outer plate members 95, 95 are provided so as to cover both outer sides of these side vents 94, 94. The left and right outer plate members 95, 95 are erected at the same height with a predetermined interval in the width direction, whereby an upper vent 96 is formed above the outer plate members 95, 95.

  By the way, in such a roof ventilator 90, since the upper ventilation opening 96 is opened upwards, there exists a possibility that the rain water which entered from the upper ventilation opening 96 may blow directly into the side ventilation openings 94 and 94. . Therefore, upper inclined portions 95a and 95a that are inclined inward are formed on the upper portions of the outer plate members 95 and 95, and louvers (blade plates) that are inclined in the same direction and at the same angle as the upper inclined portions 95a and 95a. ) Members 96, 96 are provided (see, for example, Patent Document 1).

JP 2003-74929 A

  However, even in the roof ventilator in which the upper inclined portions 95a and 95a and the louver members 96 and 96 are provided on the upper portions of the outer plate members 95 and 95, in the case of bad weather in which the direction of wind and rain changes suddenly, Raindrops incident from the right side of the air vent 96 may bounce off the inside of the left outer plate member 95, and the raindrops may indirectly enter the left side air vent 94 (for example, a rain line L97 shown in FIG. 5). .

  Moreover, the outer plate members 95 and 95 in the conventional roof ventilator are formed in a polygonal shape or an arc shape so as to surround the side vent holes 94 and 94. For this reason, in the air flow path space formed in the outer plate member 95, the vicinity of the upper stage tends to be higher than the vicinity of the middle stage. On the other hand, the roof ventilator of natural ventilation has the upper vent 96 in contact with the outside air, and a large air pressure difference may occur near the upper vent 96 depending on the wind speed. Therefore, the vicinity of the upper vent 96 is also a place where the air tends to be in a turbulent state.

  When turbulent flow occurs in the ventilation flow path, the movement of raindrops becomes random, and the raindrop rebounds directly into the side vents 94 and 94 or indirectly on the inner side surfaces of the lower inclined portions 95b and 95b. Opportunities will also increase (for example, the rain line L98 shown in FIG. 5). Therefore, in order to prevent rainwater from entering the side vents 94, 94, for example, it is conceivable to raise the body member 97 around the ventilation opening 91. As a result, the effective area of the side vents 94 is reduced. Thus, there was a problem that the ventilation efficiency deteriorated.

  The present invention has been made to solve such conventional problems, and maintains or improves ventilation efficiency and sufficiently prevents rainwater from entering the building even under bad weather conditions. An object is to provide a roof ventilator that can perform the above.

  In order to solve the above-described problems, a roof ventilator according to the present invention includes a roof plate member provided at an upper portion of a ventilation opening of a building, and left and right edges in the width direction of the ventilation opening. A plurality of pillar members that stand and support the roof plate member in a continuous direction with a predetermined interval; a side vent formed between the pillar members adjacent to each other in the continuous direction; A flow path space between each side vent and an outer plate member provided so as to face each side vent at both outer positions of the side vents, A blow prevention plate is provided that hangs from the central position in the width direction of the upper vent formed in the upper part of the outer plate member toward the roof plate member.

  Moreover, it is preferable that the roof ventilator is provided with a lower inclined plate member that is inclined so as to be lowered from the lower edge of each side vent to the lower end of each outer plate member.

  Further, in the roof ventilator, it is preferable that a cross section of the blow prevention plate cut at an arbitrary position in the continuous direction is a V shape having an acute angle downward.

According to the roof ventilator of the present invention, by providing the blow prevention plate that hangs from the center position in the width direction of the upper vent toward the roof plate member, the occurrence of turbulence near the upper vent is effectively suppressed. can do.
In addition, by providing a lower inclined plate member that is inclined so as to be lowered from the lower edge of the side vent toward the lower end of each outer plate member, rainwater can be collected outside the ventilation opening, The chance of raindrops entering the side vents indirectly can be reduced.
Therefore, it is possible to sufficiently prevent rainwater from entering without maintaining the effective area of the side vent and deteriorating the ventilation efficiency.

1 is an external perspective view of a roof ventilator according to an embodiment of the present invention. It is sectional drawing of the roof ventilator of FIG. FIG. 3 is a side view of the roof ventilator as seen from an arrow III in FIG. 2 excluding an outer plate member. It is sectional drawing for demonstrating an effect | action of the roof ventilator of FIG. It is sectional drawing of the roof ventilator by a prior art example.

  Hereinafter, the structure of the continuous roof ventilator 1 which performs natural ventilation as a roof ventilator which concerns on this invention is demonstrated with reference to FIGS. 1-3. FIG. 1 is an external perspective view of a roof ventilator 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view when the roof ventilator 1 is cut at an arbitrary position in the continuous direction. FIG. 3 is a side view of the roof ventilator 1 as seen from an arrow III in FIG. 2 excluding the outer plate member.

  The roof ventilator 1 is provided, for example, on the top of a vertically long ventilation opening 2 formed on a roof or rooftop of a building where heat is generated such as a cleaning factory. When the roof of the building is a flat roof such as a flat roof, a rising frame 2a is provided at the ventilation opening, and the roof ventilator 1 is installed thereon. Such an upright frame 2 a may be used as an attachment frame for the roof ventilator 1, integrally with the roof ventilator 1 or as a separate body. In addition, in a building where a ventilation opening is formed in the gable roof ridge, a roof ventilator may be mounted on the ventilation opening so as to straddle the inclined roof.

  For example, as shown in FIG. 3, the continuous roof ventilator 1 has a configuration in which a portion divided by adjacent pillar members 4 and 4 is regarded as one unit and is elongated in a direction in which a plurality of units are continuous. doing. In this specification, a direction in which a plurality of units are continuous is referred to as a “continuous direction”, and a direction orthogonal to the continuous direction is referred to as a “width direction”.

  The roof board member 3 provided on the upper part so as to cover the ventilation opening 2 of the building is formed in a gable shape having two roof boards inclined in the width direction. The roof plate member 3 is formed of a light metal plate such as a thin steel plate or an aluminum alloy which has been subjected to a surface treatment such as corrosion prevention. The roof plate member 3 may be made of a transparent glass plate or the like to have a function as a lighting skylight.

  The plurality of column members 4, 4,... That support the roof plate member 3 are the positions of the left and right edges 21, 2r in the width direction of the ventilation opening 2 (lateral direction shown in FIG. 2). It is attached in contact with the inner wall of the upper frame 2a. That is, for example, the upper bracket 4a and the lower bracket 4b are fixed to the base end portion of each column member 4 by welding or the like, and the upright frame 2a is sandwiched between the upper bracket 4a and the lower bracket 4b and bolted, Each column member 4 is fixed to both edges 2 l and 2 r of the ventilation opening 2. Further, the pillar members 4, 4,... Are erected along the left and right edges 2l, 2r of the ventilation opening 2 at a predetermined interval in the continuous direction of the roof ventilator 1 (FIG. 3). And between the pillar members 4 and 4 which adjoin each other, the side part vent hole 5l, ..., 5r, ... is formed.

  .. Are provided on the upper end portion of each column member 4, and the roof plate member 3 is placed and fixed on the upper surface of the roof beam members 6, 6. In addition, reinforcing reinforcement members 7 and 7 are provided between the two column members 4 and 4 that are separated in the width direction.

  The column member 4, the roof beam member 6, and the bracing member 7 are members that form the skeleton of the roof ventilator 1, and light metals such as steel or aluminum alloy can be used as the material thereof. In addition, as a method of fixing and joining the column member 4, the roof beam member 6, the bracing member 7 and the like when the unit is assembled in a factory or on-site, an appropriate method such as bolting or welding depending on the part is used. be able to.

  As shown in FIGS. 2 and 3, the left and right side vents 5l and 5r have two louver members 8 and 8 which are inclined so as to be lowered outward, and are adjacent column members. 4 and 4 are provided so as to be connected. Further, saddle plate members 18 and 18 are provided on the edges 2l and 2r of the ventilation opening 2 so as to be connected to the waterproof vertical trunk plate.

In particular, as shown in FIG. 2, the roof ventilator 1 is a thin plate member that is symmetrical in the width direction in order to prevent wind and rain from blowing directly into the building from the side vents 5l and 5r. Plate members 10l and 10r are provided. The left and right outer plate members 10l and 10r are opposed to the side vents 5l and 5r at a predetermined distance, whereby a ventilation channel space is secured between the side vents 5l and 5r. ing. The outer plate members 10l and 10r are erected at the same height in the vertical direction, and are separated from each other with a predetermined interval in the width direction. Thereby, the upper vent 15 is formed in the upper part of the outer plate members 10l and 10r.
In order to prevent birds and flying objects from the outside from entering the outer plate members 10l and 10r, the upper vent 15 may be blocked by a net member 16 as shown in FIG. desirable.

  A plurality of beam members 20 are bridged and fixed on the left and right outer plate members 10l and 10r so as to cross the continuous direction of the upper vent 15. In particular, as shown in FIG. 2, a blow prevention plate 21 that hangs (hangs down) from the center position in the width direction of the beam member 20 toward the roof plate member 3 is provided. The blow prevention plate 21 extends long in the continuous direction of the roof ventilator 1, and a lower tip portion thereof is formed in a V shape having an acute angle in the cross section, that is, in a wind cut shape. The blow prevention plate 21 has a structure in which two plates face each other in a V shape.

  Providing such a blow prevention plate 21 has the effect of suppressing the movement of the right and left raindrops in the vicinity of the upper vent 15 and the wind speed, thereby preventing the occurrence of a turbulent state. In particular, the lower tip portion of the blow prevention plate 21 is formed in a V-shaped cross section, so that the pressure difference in the vertical direction in the ventilation flow path can be slowed down and a turbulent state can be prevented more effectively. it can.

  The upper inclined portions 11 and 11 formed on the upper portions of the outer plate members 10l and 10r are directed inward to prevent rainwater entering from the upper vent 15 from directly entering the side vents 5l and 5r. It is formed so as to be inclined. A plurality of slat members 17, 17, 17... Having the same inclination angle are provided in parallel with the upper inclined portion 11. The upper inclined portion 11 and / or the slat member 17 blocks rain (for example, the line L1 in FIG. 4) obliquely incident from the upper vent 15 toward the left side vent 51, for example, and the side vent. It prevents rain from entering directly into 5 liters.

In the lower part of the outer plate member 101, a lower inclined plate member 13 is provided that is inclined outwardly, that is, lower toward the lower end of the outer plate member 101. The lower end of the outer plate member 101 and the lower end of the lower inclined plate member 13 are not in contact with each other, or are in intermittent contact at predetermined locations. Thus, a slit-shaped drain port 19l is formed between the lower end of the outer plate member 101 and the lower end of the lower inclined plate member 13.
Similarly, in the lower part of the right outer plate member 10r, there is provided a lower inclined plate member 13 which is inclined so as to become lower from the lower edge of the side vent 5r toward the lower end of the outer plate member 10r symmetrically with the left side. It has been. Thus, a slit-shaped drain port 19r similar to that on the left side is also formed between the lower end of the right outer plate member 10r and the lower end of the lower inclined plate member 13.

  The roof ventilator 1 of this embodiment may be provided with the rectifying plate members 22, 22,... Orthogonal to the left and right outer plate members 10l, 10r, for example, for each continuous unit. By providing such a rectifying plate member 22, it is possible to restrict the flow of exhaust and supply air in the continuous direction, prevent the occurrence of turbulence, and improve the ventilation efficiency.

Next, the operation of the roof ventilator 1 having such a configuration will be described with reference to FIG.
Air (exhaust gas) heated to a relatively high temperature by exhaust heat generated in the building passes through the ventilation opening 2 provided on the roof and rises to the space below the roof plate member 3. Then, the exhaust gas that has reached the space below the roof plate member 3 passes through the left and right side vents 5l and 5r, further rises in the flow path space inside the outer plate members 10l and 10r, and the upper vent 15 To the outside. By taking in outside air from the building and supplying it, the roof ventilator 1 naturally ventilates and ventilates the building.

  Moreover, in the roof ventilator 1 of this embodiment, as will be described below, it is possible to effectively prevent wind and rain from blowing into the building and intrusion of rainwater.

(1) First, the roof ventilator 1 includes outer plate members 10l and 10r provided to cover the side vents at the outer positions of the left and right side vents 5l and 5r. The left and right outer plate members 10l and 10r block, for example, wind and rain blowing from the side, and prevent rainwater from directly blowing into the side vents 5l and 5r.

(2) Further, the upper inclined portion 11 and the wing plate members 17, 17,... Formed on the upper portions of the outer plate members 10 l and 10 r are, for example, the upper vent 15 shown by the rain line L 1 in FIG. The wind and rain incident obliquely on is blocked, and rainwater is prevented from directly blowing into the side vent 5l. For example, as shown by the rain line L2 in FIG. 4, even if a strong cross wind once enters the upper vent 15, it is blocked by the blowing prevention plate 21, and most of it is blown outward. Further, a part of the cross wind from the left hits the blowing prevention plate 21 and the wind speed is weakened there, so that it falls on the left roof plate member 3. That is, the wind and rain that enters from the left of the blow prevention plate 21 hardly enters the right space directly.

(3) In addition, raindrops that have entered directly from the upper vent 15 or bounced off by the slat member 17 flow down the inner side surface of the outer plate member 101 as shown by a line L3 in FIG. Drained from the outside. Further, rainwater flowing on the roof plate member 3 also falls on the outer plate members 10l and 10r, and is finally discharged from the drain ports 19l and 19r.

(4) In addition, raindrops that have entered substantially perpendicularly and bounced off the inner surfaces of the outer plate members 10l and 10r and rainwater that has fallen on the lower inclined plate members 13 and 13 are, for example, as shown by a line L4 in FIG. It is bounced back to the outer plate member 101 side, or flows down the lower inclined plate member 13 as indicated by, for example, the line L5, and is finally discharged from the drain port 19r.

(5) In this way, most of the rainwater entering from the upper vent 15 is collected in the left and right drains 19l, 19r that are separated from the ventilation opening 2 of the building. Since the left and right lower inclined plate members 13 and 13 are inclined so as to be lowered outward, water does not flow to the ventilation opening 2 at a high position, and the edge 2 l of the opening, Water leakage from the 2r joint can be almost eliminated.

(6) Further, the roof ventilator 1 is provided with the blow prevention plate 21 at the central position in the width direction of the upper vent 15, thereby suppressing the right and left flow and wind speed of wind and rain near the upper vent 15. Thereby, even if it is under bad weather with strong wind and rain, generation | occurrence | production of the turbulent flow in the upper vent 15 vicinity can be prevented. In particular, in the present embodiment, the lower tip portion of the blow prevention plate 21 is formed in a V-shaped cross section, so that the pressure difference in the ventilation flow path is slowed down and turbulence is more effectively suppressed. Can do.

(7) When the turbulent flow in the ventilation channel is suppressed, the ventilation efficiency of the roof ventilator 1 is improved. Further, raindrops are not randomly blown into the side vents 5l and 5r. Therefore, it is possible to effectively prevent wind and rain from blowing into the building and intrusion of rainwater while maintaining the effective areas of the side vents 5l and 5r, that is, without deteriorating the ventilation efficiency.

DESCRIPTION OF SYMBOLS 1 Roof ventilator 2 Ventilation opening 2l, 2r Edge 2a Standing frame 3 Roof board member 4 Column member 5l, 5r Side vent 6 Roof beam member 7 Bracing member 8 Louver member 10 (10l, 10r) Outboard member 11 Upper inclined portion 13 Lower inclined plate member 15 Upper vent 16 Net member 17 Wing plate member 18 Plate member 19l, 19r Drain port 20 Beam member 21 Blowing prevention plate 22 Rectifier plate member

Claims (3)

A roof plate member provided at the top of the ventilation opening of the building;
A pillar member that supports a plurality of the roof plate members by standing up and down at a predetermined interval in a direction in which the roof plate members continue along the left and right edges in the width direction of the ventilation opening,
Side vents formed between the column members adjacent to each other in the continuous direction;
A flow path space between each side vent and an outer plate member provided to face each side vent at both outer positions of the side vents, and
A roof ventilator provided with a blow prevention plate that hangs from the central position in the width direction of the upper vent formed in the upper part of each outer plate member toward the roof plate member.   The roof ventilator according to claim 1, further comprising a lower inclined plate member that is inclined so as to be lowered from a lower edge of each side portion vent toward the lower end of each outer plate member. The roof ventilator according to claim 1 or 2, wherein a cross section of the blow-in prevention plate cut at an arbitrary position in the continuous direction is a V shape having an acute angle downward.

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