JP2008138955A - Vent cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vent cap capable of improving certainty of waterproofing while preventing a pressure loss and intrusion of wind and rain from a gap between a front face hood and a pipe guide, facilitating selection when simplifying and compactifying structure of the front face hood to provide correspondence to an outer wall, and capable of improving maintenance and workability of cleaning by facilitating detachment. <P>SOLUTION: In the vent cap 3, the pipe guide 5 of a tube is provided on a back face side of a base plate 4, and the front face hood 6 is attached with a gap in a front face side. An outer side rain protection plate 8 and an inner side rain protection plate 9 are positioned in the gap formed between the base plate 4 and the front face hood 6, and they are protrudedly provided from the base plate 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vent cap, and more particularly to a supply / exhaust vent cap installed in a ventilation duct provided on a wall of a building.

  FIG. 9 shows an example of a conventional vent cap. In FIG. 9, reference numeral 1 denotes an outer wall, 2 denotes an outer wall through supply / exhaust duct passing through the outer wall 1, and the vent cap 3 is installed at an opening of the supply / exhaust duct 2. This is provided with a cylindrical pipe guide 5 on the back side (indoor side) of the base plate 4, and the front side (outdoor side) of the base plate 4 is covered with a front hood 6.

  The front hood 6 is disposed so as to protrude outward so that a gap is formed between the front hood 6 and the pipe guide 5 so that wind and rain enter the pipe guide 5 from the gap. There is a fear.

  Therefore, as means for solving such inconvenience, there are, for example, a front hood larger than the outer wall penetrating portion (for example, see Patent Document 1), and a front hood 4 having a double structure of an outer portion and an inner portion. (For example, refer to Patent Document 2).

The outer part is formed in a substantially disk shape or a substantially rectangular shape, and the inner part is integrally formed with a hood part that protrudes in the direction of the pipe guide and a folded part that extends outward from the edge of the hood part. Therefore, such a double structure effectively prevents the blowing of wind and rain.
JP 2002-243230 A JP-A-9-33083

  The front hood is installed in a state of projecting outward from the outer wall surface, and it is desired that the outer wall surface should be uniform in terms of design, and can be easily selected according to the form of the outer wall. Is desired. The front hood should be easily replaced for cleaning and maintenance.

  However, the front hood described in Japanese Patent Application Laid-Open No. 2002-243230 is larger than the outer wall through opening, and the front hood described in Japanese Patent Application Laid-Open No. 9-33083 has a double structure to prevent intrusion of wind and rain. It becomes a large-scale one, and it takes time for attaching / detaching and replacing work, and cleaning workability and maintenance are not good.

  Also, in order to match the outer wall, it is necessary to select only the face surface of the front hood, that is, the outer part, but because the structure of the outer part and the inner part is integrated, the entire front hood has to be replaced. The workability is not good and the cost increases.

  The present invention can improve the sureness of water stoppage while reducing pressure loss even by the intrusion of wind and rain from the gap between the front hood and the pipe guide, further eliminates the disadvantages of the conventional example, and makes the front hood structure simple and compact. Thus, it is an object of the present invention to provide a vent cap that makes it easy to select an external wall, and can be easily attached and detached to improve workability of maintenance and cleaning.

  According to a first aspect of the present invention, in a vent cap in which a cylindrical pipe guide is provided on the back side of the base plate and a front hood is attached with a gap on the front side, the vent plate is formed between the base plate and the front hood. The gist is that the outer rainproof plate and the inner rainproof plate are projected from the base plate so as to be positioned in the gap.

  According to this invention of Claim 1, by arrange | positioning the double rainproof board by an outer side rainproof board and an inner side rainproof board in the clearance gap formed between a base board and a front hood, the said Wind and rain can be prevented from entering the inside of the pipe guide from the gap.

  In this case, since the outer rainproof plate and the inner rainproof plate are projected from the base plate, the shape of the front hood can be a simple disk shape, for example, which can be a simple structure and is compact. Not only can the cost be reduced, but it can be easily attached and detached, can be easily selected to fit the outer wall, and maintenance and cleaning workability is improved.

  The gist of the invention described in claim 2 is that the outer rainproof plate is formed with a notch in the side surface, and a plate-shaped inner rainproof plate having a folded portion is disposed at a position corresponding to the notch. It is what.

  According to this invention of Claim 2, a pressure loss can be reduced by forming a notch part in the side part of an outer side rainproof board. In this case, rainwater may enter the pipe guide from the notch, but the rainwater intrusion can be prevented by arranging a plate-shaped inner rainproof plate only at a position corresponding to the notch. Prevention can be achieved.

  In particular, the provision of the folded part changes the direction of the rainwater and flows toward the outside, making it difficult for the inside of the vent cap to enter, and the distance between the left and right inner rainproof plates is also different from the folded part. Compared with the case where it is not provided, the length can be made longer, and the reduction in the opening area of the pipe guide can be reduced.

  The gist of the invention described in claim 3 is that the inner rainproof plate is formed in a cylindrical body.

  According to the third aspect of the present invention, by forming the inner rainproof plate in a cylindrical shape, the shape of the outer rainproof plate and the front hood can be made cylindrical as a whole. Exhaust can be performed and pressure loss can be reliably reduced.

  As described above, the vent cap according to the present invention is provided by attaching the inner and outer rainproof plates to the base plate when the inner rainproof plate and the outer rainproof plate are disposed between the front hood and the base plate. The intrusion of wind and rain from the gap between the front hood and pipe guide can also improve the reliability of water stoppage while reducing pressure loss, and the front hood structure is simple, compact, and can be selected for adapting to the outer wall. The front hood can be easily attached and detached, and maintenance and cleaning workability can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway side view showing a first embodiment of the vent cap of the present invention, FIG. 2 is a partially cutaway front view of the same, and FIG. 3 is a partially cutaway plan view of the same. The same components as those of the conventional example are denoted by the same reference numerals, and detailed description thereof is omitted.

  The vent cap 3 of the present invention is also installed in the opening of the air supply / exhaust duct 2 penetrating the outer wall 1 as in the conventional structure, and a cylindrical pipe guide 5 is provided on the back side (indoor side) of the base plate 4. And the front side of the base plate 4 (outdoor side) is covered with a front hood 6 with a gap for air supply and exhaust. In the figure, reference numeral 7 denotes a stay for attaching the front hood 6 to the base plate 4, so that the joint portion with the base plate 4 is bolted so that it can be easily selected and attached / detached after attachment. I made it. The front hood 6, the stay 7, and the outer rainproof plate 8 may be integrally formed, and the joint between the portion and the base plate 4 may be bolted.

  In the present invention, both the base plate 4 and the front hood 6 are formed in a disc shape, and the diameters of both are formed to be equal.

  In the vent cap 3 having such a configuration, a ring-shaped outer rainproof plate 8 is further attached to the front portion of the base plate 4. In this case, the ring width of the outer rainproof plate 8 is set to such a height that a gap remains between the outer rainproof plate 8 and the front hood 6. The outer rainproof plate 8 is further provided with notches 8a for air supply / exhaust on the left and right sides, and a large opening for air supply / exhaust is ensured on the side of the vent cap 3.

  As a means for preventing rainwater from entering through an opening formed largely by the notch 8a on the side of the vent cap 3, an inner rainproof plate 9 is projected from the base plate 4 at a position corresponding to the notch 8a. To do. In the first embodiment, the inner rainproof plate 9 is an L-shaped plate having a bent portion 9 a that is bent at right angles to the direction of the front hood 6, and the bent portion 9 a is formed in the inner portion of the pipe guide 5. Arrange it so that it takes slightly.

  The protrusion height of the bent portion 9a determines the rainwater incident angle to be blocked in relation to the width of the front hood 6 as shown in FIG. 4, and the rainwater intrusion from the notched portion 8a of the outer rainproof plate 8 is determined. In order to prevent the rainwater incident angle, the rainwater incident angle is from the imaginary line connecting the inside of the vent cap 3 diagonally from the end of the pipe guide 5 to the end of the front hood 6, and the end of the pipe guide 5. The distance between the inside of the vent cap 3 and the virtual line connecting the tip of the notch 8a of the outer rainproof plate 8 on the diagonal line was set as the rainwater incident angle.

  The setting of the rainwater incident angle is not limited to the above, and as shown in FIGS. 5 to 8, for example, the end of the pipe guide 5 on the base plate 4 side and the end of the front hood 6 are connected. The space between the virtual line and the tip of the notch 8a of the outer rainproof plate 8 can be set as the rainwater incident angle.

  Then, an inner rainproof plate 9 is projected from the base plate 4 so as to block this rainwater incident angle. As a result, rainwater intrusion prevention means having a double structure by the outer rainproof plate 8 and the inner rainproof plate 9 is disposed in the gap formed over the entire circumference between the base plate 4 and the front hood 6.

  Next, the operation will be described. The rainwater entering the vent cap 3 is first blocked by the outer rainproof plate 8, but the rainwater that has entered the interior from the opening largely secured by the notch 8 a is blocked by the inner rainproof plate 9. Intrusion into the pipe guide 5 is prevented.

  In this case, the rainwater hitting the inner rainproof plate 9 flows along the bent portion 9a and the flow direction is changed so as to flow toward the outside of the vent cap 3, so that the rainwater enters the pipe guide 5. Can be surely stopped.

  By providing the notch 8a in this way, pressure loss is reduced and rainwater intrusion is surely prevented. Further, by providing the bent portion 9a on the inner rainproof plate 9, the bent portion 9a is provided. Since the front end of 9a protrudes from the base plate 4 toward the front hood 6 and rainwater can be prevented from entering into this portion, the left and right inner rainproof plates are compared to a completely flat rainproof plate without a bent portion. The interval between 9 can be set large.

  Thereby, the opening area of the pipe guide 5 blocked by the inner rainproof plate 9 can be reduced and the pressure loss can be reduced while the diameter of the front hood 6 is formed as compact as the base plate 4.

  FIG. 5 shows a second embodiment, in which the rainwater incident angle is between a line connecting the front end of the pipe hood 5 on the front hood 6 side and the end of the front hood 6 with a diagonal line and an extension line of the end of the pipe guide 5 The angle was set, and the tip of the bent portion 9a was positioned within this range. Thereby, in 2nd Embodiment, rainwater permeation can be prevented before the pipe guide 5. FIG.

  FIG. 6 shows the third embodiment, and the overall shape of the inner rainproof plate 9 is substantially U-shaped, and is bent at right angles from the outer peripheral end to the front hood 6 among the attachment portions to the base plate 4. Thereafter, the tip was further bent inward at a right angle, that is, parallel to the front hood 6 to form a folded portion 9b.

  FIG. 7 shows a fourth embodiment, which is basically similar in structure to the third embodiment, but the folded portion 9b is brought closer to the front hood 6 side, and the folded portion parallel to the front hood 6 by that amount. The length of the part 9b was shortened.

  In both the third and fourth embodiments, the position of the tip of the folded portion 9b that is parallel to the front hood 6 reaches the diagonal line that determines the rainwater incident angle described in the second embodiment.

  FIG. 8 shows a fifth embodiment, in which the inner rainproof plate 9 is formed in a cylindrical shape and protrudes from the base plate 4 toward the front hood 6. In this case, compared to the first to fourth embodiments, the inner rainproof plate 9 protrudes not only on the side portions but also on the entire circumference, so that in terms of pressure loss, it is inferior to the first to fourth embodiments. However, rainwater intrusion can be prevented on the entire circumference, so that it is excellent in water stoppage.

  Also in the case of the fifth embodiment, it is assumed that the cylindrical tip of the inner rainproof plate 9 reaches a diagonal line that determines the rainwater incident angle.

It is a partially cutaway side view showing a first embodiment of the vent cap of the present invention. It is a partially cutaway front view which shows 1st Embodiment of the vent cap of this invention. It is a partially cutaway top view which shows 1st Embodiment of the vent cap of this invention. It is a top view explaining the incident angle which shows 1st Embodiment of the vent cap of this invention. It is a cross-sectional top view which shows 2nd Embodiment of the vent cap of this invention. It is a cross-sectional top view which shows 3rd Embodiment of the vent cap of this invention. It is a cross-sectional top view which shows 4th Embodiment of the vent cap of this invention. It is a cross-sectional top view which shows 5th Embodiment of the vent cap of this invention. It is a cross-sectional top view which shows the prior art example of a vent cap.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer wall 2 Supply / exhaust duct 3 Vent cap 4 Base plate 5 Pipe guide 6 Front hood 7 Stay 8 Outer rainproof plate 8a Notch 9 Inner rainproof plate 9a Bending portion 9b Folded portion

Claims (3)

  In the vent cap where a cylindrical pipe guide is provided on the back side of the base plate and a front hood is attached with a gap on the front side, it is positioned in the gap formed between the base plate and the front hood, A vent cap characterized in that an outer rainproof plate and an inner rainproof plate protrude from the base plate.   The vent cap according to claim 1, wherein the outer rainproof plate is formed with a notch in a side surface portion, and a plate-shaped inner rainproof plate having a folded portion is disposed at a position corresponding to the notch.   The vent cap according to claim 1, wherein the inner rainproof plate is formed in a cylindrical body.

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