JP2007240103A - Ventilation duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation duct which is excellent in economical property, installation workability and installation strength with a minimized number of part items and can ensure excellent sealing property through a simple work. <P>SOLUTION: A flange part 30 is integrally provided on an outdoor-side end portion of a cylindrical duct body 20 to be disposed through an installation hole formed through a wall body 10 so as to connect the outdoor side with the indoor side while retaining a clearance. The flange part 30 includes a plurality of circular through-opening parts 33 formed along the outer circumferential surface of the duct body 20 so as to retain the duct body 20 within the installation hole by the attachment to the wall body 10 and connect with the clearance between the outer circumferential surface of the duct body 20 and the inside surface of the installation hole. After the ventilation duct is installed, a caulking agent 80 is injected to the clearance through the plurality of through-opening parts 33 to fill and seal the clearance. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a ventilation duct that is mounted through a wall of a building for ventilation.

  In recent years, the airtightness of buildings has increased, and in order to perform ventilation, it has become necessary to separately install a ventilation duct on the wall. As a basic structure of the ventilation duct, it is combined with a cylindrical duct main body that is disposed through a mounting hole formed through a wall body, and a duct main body for holding and fixing the duct main body in the mounting hole. A combination of a flange-shaped attachment plate and a hood that is directly or indirectly attached to the wall so as to cover the opening of the duct body from the outside is common. The mounting plate is usually attached to the outer surface of the wall to fix the duct body.

  The problem with such a ventilation duct is that the outer diameter of the duct body needs to be smaller than the inner diameter of the mounting hole provided in the wall of the building, and an annular gap is formed between them, resulting in an airtightness. It is that the nature decreases. Regardless of the presence or absence of this gap, in cold districts, condensation occurs on the inner and outer surfaces of the duct body due to temperature differences between the inside and outside of the building. There is also the problem of running down and soiling its exterior. One countermeasure for solving such a problem is described in Patent Document 1.

JP 2003-202143 A

  In the countermeasure described in Patent Document 1, a flange-shaped mounting plate through which the duct body passes is separated from the duct body, and a seal packing is interposed between the two. According to this measure, dew condensation water or intrusion water in the duct main body leaks from between the mounting plate and the duct main body, and a phenomenon of traveling toward the outer surface of the wall body through the outer surface of the protruding portion of the duct main body is avoided. Moreover, it is not necessary to project the duct main body greatly from the wall body, and the design is improved.

  However, this measure requires at least three parts, ie, a duct main body, a mounting plate, and seal packing as components, which increases costs and deteriorates assembling and mounting workability. Since seal packing is interposed between the duct main body and the mounting plate for fixing the duct main body, it is difficult to firmly fix the duct main body. In order to close the annular gap between the mounting hole of the wall body and the duct body, a caulking work is required, and the mounting workability is further deteriorated. The service life of the seal packing is not so long, and if the sealability is lowered in the future, a caulking work is required, and the caulking work is not reflected in the design, which is a very difficult work.

  The present invention was devised in view of such circumstances, and provides a ventilation duct that has a small number of parts, is excellent in economy, mounting workability, mounting strength, and can secure excellent sealing performance by a simple work. With the goal.

  In order to achieve the above object, a ventilation duct according to the present invention includes a cylindrical duct body that is disposed with a gap in a mounting hole formed so as to penetrate the wall body so as to allow communication between the outdoors and indoors, and a duct body. Is installed at the end of the duct body on the outdoor side so as to cover the mounting hole from the outdoor side when it is disposed through the mounting hole, and the flange that holds the duct body in the mounting hole by being attached to the wall body The flange portion extends along the outer circumferential surface of the duct body so as to communicate with a gap formed between the outer circumferential surface of the duct body and the inner circumferential surface of the mounting hole. A plurality of slit-shaped through-openings formed in this manner are provided in the circumferential direction of the main body.

  In the ventilation duct according to the present invention, the duct body is held in the mounting hole of the wall body by attaching a flange portion attached to the duct body as an attachment plate to the outer surface of the wall body. The duct body held in the mounting hole creates a gap with the inner peripheral surface of the mounting hole, but a sealing filler such as a caulking agent is provided from a plurality of slit-like through openings provided in the flange portion. By pouring, this gap is closed. In other words, without using seal packing, by actively using a seal filler that is indispensable in the future at the time of construction, the number of parts can be reduced and workability can be improved.

  Regarding the duct body, it is preferable to wind, for example, a soundproof tape as a filler stopper around the outer peripheral surface of the duct body so that the duct body is positioned in the vicinity of the indoor-side mounting hole when the duct body is disposed through the mounting hole. . Thereby, it is possible to prevent the sealing filler filled between the mounting hole and the duct main body from being undesirably protruding into the room. Further, the sealing filler can be made invisible from the indoor side.

  As for the flange portion, an outer rib having an almost same height as the inner peripheral portion is formed on the rear surface so that an annular concave portion is formed on the outer peripheral side of the inner peripheral portion where the slit-shaped through opening is formed. It is preferable to provide it in the position. By disposing, for example, a soundproof sheet or the like as a sealing member in the recess, the airtightness between the flange portion and the wall body can be enhanced. Moreover, the construction of the seal member is simple.

  About this outer rib, it is preferable to form the annular recessed part which is located inside the outer periphery of a flange part, and opens to an outer peripheral side between wall bodies, when a flange part is attached to a wall body. By filling the formed annular recess with a sealing filler such as a caulking agent, the airtightness between the flange portion and the wall body can be further enhanced. Moreover, filling construction is easy and the filled material is also difficult to see from the outside.

  Regarding the flange portion, it is also preferable to provide a hood locking portion for attaching the hood on the front surface. Accordingly, the hood can be easily attached and the work can be easily performed.

  The ventilation duct according to the present invention is basically composed of an integral part in which a flange portion is provided at an end portion on the outdoor side of the duct body inserted into the mounting hole of the wall body, and has a small number of parts and is excellent in economic efficiency. By simply attaching the flange portion to the outer surface of the wall body, the duct body can be held in the mounting hole of the wall body, so that the installation work is simple and the attachment strength is high. In addition, the gap is closed by injecting a sealing filler such as a caulking agent into the gap between the mounting hole and the duct body inside thereof from a plurality of slit-like through openings provided in the flange portion. High airtightness can be imparted to the gap. Since the filling operation is also performed from the outdoor side, the workability of the filling operation is good. Even if the sealing performance of the gap is lowered, the filler for sealing may be injected again in the same manner, so that both workability and economical efficiency in repair are good.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is a front view showing a use state of a ventilation duct according to an embodiment of the present invention, FIG. 2 is a longitudinal side view showing the use state of the ventilation duct, FIG. 3 is a front view of the ventilation duct, and FIG. FIG. 5 is a sectional view taken along the line bb ′ in FIG. 3, and FIG. 6 is a rear view of the ventilation duct. 7 is a side view showing a state where the accessory of the ventilation duct is attached, FIG. 8 is a rear view showing a state where the accessory of the ventilation duct is attached, and FIG. 9 is a step-by-step construction method of the ventilation duct. It is a vertical side view shown in FIG.

  As shown in FIGS. 1 and 2, the ventilation duct according to the embodiment of the present invention is an exhaust duct that is attached through the wall 10 of the building for ventilation in the building, particularly for exhaust. For mounting the ventilation duct, a circular mounting hole 11 is provided through the wall 10.

  As shown in FIGS. 3 to 6, the ventilation duct includes a cylindrical duct body 20 that penetrates the mounting hole 11, and a flange portion 30 that is integrally provided at the end of the duct body 20 on the outdoor side. These are made of ABS resin or the like. The duct body 20 has an outer diameter smaller than the inner diameter of the mounting hole 11 for insertion into the mounting hole 11, and is formed in a tapered shape whose outer diameter gradually decreases from the outdoor side to the indoor side. Yes.

  The flange portion 30 is a square square plate integrally formed at a position slightly away from the front end of the duct body 20 on the outdoor side, and the four corner portions are fixed to the outer surface of the wall body 10 by screws 40, thereby providing a ventilation duct. Is fixed to the wall 10. For this screwing, screw holes 31 are provided at the four corners of the flange portion 30, and a pair of left and right hood locking portions 32, 32 are provided on the upper edge portion in order to attach a hood to the outdoor side. Are provided integrally. Here, the hood locking portions 32 and 32 are hook-shaped horizontal plates that protrude horizontally toward the front side and have a hook-like tip.

  The flange portion 30 also has a plurality of slit-like through openings 33 in the inner peripheral portion in contact with the duct body 20. The plurality of through openings 33 have an arc shape that penetrates the flange portion 30 in the thickness direction and is curved in the circumferential direction along the outer peripheral surface of the duct body 20. Are arranged in the circumferential direction at a slight interval. The annular opening with a partition configured by combining a plurality of through openings 33 is designed such that the inner diameter on the outer peripheral side is larger than the inner diameter of the mounting hole 11 of the wall body 10, and the caulking of the caulking through the opening from the outdoor side. A difference in inner and outer diameters (opening width) that can perform the injection work is secured.

  A circular inner rib 34 is integrally provided on the rear surface of the flange portion 30 so as to surround the plurality of through openings 33. The inner rib 34 has the same height as the partition wall 35 that partitions the adjacent through openings 33 and 33. On the outer side of the inner rib 34, a rectangular annular rib 36 is provided as an outer rib. The annular rib 36 is a substantially quadrilateral along the four sides of the flange portion 30, and more specifically, is an octagon that avoids the screw holes 31 at the four corners, with a slight gap between the four sides of the flange portion 30. Is provided. Similar to the inner rib 34, the annular rib 36 is integrally projected on the back surface of the flange portion 30 and is designed to have the same height as the inner rib 34.

  Also, four base ribs 37 as a support portion are integrally provided on the back surface of the flange portion 30. The four base ribs 37 are at the four corners of the flange portion 30 and are adjacent to the screw holes 31 outside the annular rib 36, and the height thereof is the same as that of the other ribs.

  In other words, in the flange portion 30, the inner peripheral portion in contact with the duct main body 20 is thicker than the other portions, and a plurality of through openings 33 are provided in the thick portion, and the thicker portion than the thick portion. An annular rib 36 and four base ribs 37 are provided on the back surface of the outer thin portion. As a result of the formation of the annular rib 36, an annular recess 38 is formed between the inner thick portion (inner rib 34).

  Next, the construction method which attaches the ventilation duct which concerns on embodiment of this invention to the wall 10 of a building is demonstrated.

  When this ventilation duct is attached to the wall 10, first, as shown in FIGS. 7 and 8, an annular recess formed between the inner rib 34 on the back surface of the flange portion 30 and the annular rib 36 on the outer side thereof. A soundproof sheet 50 as a sealing member is affixed to the inside 38 with a double-sided tape or the like. Since the soundproof sheet 50 is thicker than the ribs 34 and 36, the soundproof sheet 50 protrudes to the back side of the flange portion 30 and surrounds the flange vicinity portion of the duct body 20. Apart from this, the outer peripheral surface of the duct main body 20, specifically, a part slightly away from the flange portion 30 to the indoor side, more specifically, when the ventilation duct is attached to the wall body 10, it slightly protrudes from the attachment hole 11. The soundproof tape 60 is wound around and fixed by double-sided tape or the like as a filler stopper.

  When the above preparation is completed, the duct body 20 of the ventilation duct is inserted concentrically from the outside of the wall body 10 into the mounting hole 11 as shown in FIG. At this time, it goes without saying that the flange portion 30 is positioned on the outdoor side and the duct body 20 is inserted from the opposite flange side. Then, the duct body 20 is inserted into the mounting hole 11 until the flange portion 30 contacts the outer surface of the wall body 10, and the flange portion 30 is fixed to the outer surface of the wall body 10 with the screws 40.

  This state is shown in FIG. 9B, and the inner rib 34 provided on the back surface of the flange portion 30, the outer annular rib 36 and the base ribs 37 at the four corners abut against the outer surface of the wall body 10. The base ribs 37 at the four corners contact the outer surface of the wall body 10, so that the four corner portions of the flange portion 30 are securely screwed to the wall body 10. The soundproof sheet 50 attached to the annular recess 38 between the inner rib 34 and the outer annular rib 36 is brought into contact with the outer surface of the wall body 10 by the inner rib 34 abutting against the outer surface of the wall body 10. To be pushed into the recess 38 and filled tightly.

  On the other hand, an annular gap 70 is formed between the inner peripheral surface of the mounting hole 11 and the outer peripheral surface of the duct main body 20 due to the difference in diameter. The gap communicates with a plurality of arc-shaped through openings 33 formed inside the inner rib 34. Needless to say, the soundproof tape 60 is located in the vicinity of the outlet of the mounting hole 11, and its winding diameter is smaller than the inner diameter of the mounting hole 11.

  When the attachment of the ventilation duct to the wall body 10 is completed in this way, an annular gap 70 formed between the inner peripheral surface of the mounting hole 11 and the outer peripheral surface of the duct body 20 as shown in FIG. In addition, the caulking agent 80, which is a sealing filler, is injected over the entire circumference from the outdoor side through the plurality of through openings 33 of the flange portion 30, and the caulking agent 80 is also filled in the plurality of through openings 33. Perform (see FIG. 1 and FIG. 2). Thus, the wall 10 and the duct body 20 are completely sealed by the caulking agent 80.

  At this time, since the soundproof tape 60 is attached to the duct body 20, the caulking agent 80 inadvertently protrudes from the mounting hole 11 to the indoor side even though the caulking agent 80 is filled from the outdoor side. There is nothing. Further, the caulking agent 80 is not visible from the indoor side, and no problem arises in terms of beauty.

  The annular rib 36 abuts on the outer surface of the wall body 10 and is displaced inward from the four sides of the flange portion 30. For this reason, an annular recess 39 opened to the outer peripheral side is formed on the outer peripheral side of the annular rib 36, and the caulking agent 80 is also filled therein (see FIG. 2). As a result, the space between the flange portion 30 and the wall body 10 is reliably sealed together with the soundproof sheet 50 filled in the recess 38.

  As described above, in the ventilation duct according to the present embodiment, the cylindrical duct body 20 and the flange portion 30 that is a mounting plate are integrally formed, and the core portion is sealed with the caulking agent 80, and the seal member is not used. Therefore, the number of parts is small and it is excellent in economic efficiency. Moreover, since the number of parts is small and the caulking work is simple, the construction work is also simple. In particular, the flange 30 is provided with a plurality of arc-shaped through openings 33 communicating with the gap 70, and the caulking work from here to the gap 70 is performed, so that the caulking work, that is, the caulking work to the most important part is performed. It is very easy.

  In the future, when the sealing performance of the seal portion is lowered, it is common to re-seal the seal portion by caulking work regardless of the structure of the seal portion. However, in the case of the ventilation duct according to this embodiment, the seal portion Since the part is sealed by caulking from the beginning, the re-sealing of the future can be performed easily and reliably.

  10 and 11 are rear views of a ventilation duct according to another embodiment of the present invention.

  The ventilation duct shown in FIGS. 10 and 11 differs from the ventilation duct shown in FIGS. 1 to 9 in the structure of the annular rib 36 and the base rib 37 formed on the back surface of the flange portion 30. Since the other structure is the same as the ventilation duct shown in FIGS. 1-9, detailed description is abbreviate | omitted. As shown in FIGS. 10 and 11, the function of the base rib 37 is maintained while surrounding the screw hole 31 at the four corners of the flange portion 30 or by forming the annular rib 36 close to the screw hole 31. Can be omitted. In other words, the base rib 37 can be integrated with the annular rib 36.

  Further, as shown in the lower left portion of FIG. 11, the base rib 37 can be omitted, or the annular ribs 36 can be partially provided in a relatively wide range of the four corners of the flange portion 30. That is, the annular rib 36 does not necessarily have to be continuous all around.

  12 is a front view of a ventilation duct according to still another embodiment of the present invention, FIG. 13 is a side view of the ventilation duct, and FIG. 14 is a rear view of the ventilation duct.

  The ventilation duct according to the present embodiment is mainly different from the ventilation duct shown in FIGS. 1 to 9 in that the flange portion 30 is circular. Accordingly, the annular rib 36 is formed in a substantially circular shape, and is formed so as to surround the screw hole 31 and also serves as the base rib 37. A hood locking portion 32 for attaching a duct to the front side of the flange portion 30 is also formed in an arc shape along the arc at the upper edge portion of the flange portion 30. The other structure is substantially the same as that of the ventilation duct shown in FIGS.

  The ventilation duct according to the present invention can also be used as an air supply duct, and a fire damper can be appropriately provided in the duct body 20. The fire damper is normally in an open state, and when the temperature rises due to a fire or the like, the fastener is melted and the damper is automatically closed, which is effective for preventing the spread of fire.

It is a front view which shows the use condition of the ventilation duct which concerns on embodiment of this invention. It is a vertical side view which shows the use condition of the ventilation duct. It is a front view of the ventilation duct. FIG. 4 is a sectional view taken along line a-a ′ in FIG. 3. FIG. 4 is a cross-sectional view taken along line b-b ′ in FIG. 3. It is a rear view of the ventilation duct. It is a side view which shows the state which attached the accessory of the ventilation duct. It is a rear view which shows the state which attached the accessory of the ventilation duct. It is a vertical side view which shows the construction method of the ventilation duct in steps. It is a rear view of the ventilation duct which concerns on another embodiment of this invention. It is a rear view of the ventilation duct which concerns on another embodiment of this invention. It is a front view of the ventilation duct which concerns on another embodiment of this invention. It is a side view of the ventilation duct. It is a rear view of the ventilation duct.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wall body 11 Mounting hole 20 Duct main body 30 Flange part 31 Screw hole 32 Hood latching part 33 Through-opening part 34 Inner rib 35 Partition wall 36 Annular rib (outer rib)
37 Base rib 38, 39 Recess 40 Screw 50 Soundproof sheet (seal member)
60 Soundproof tape (filler stopper)
70 Clearance 80 Caulking agent (filler for seal)

Claims (8)

  A cylindrical duct body that is disposed with a gap in a mounting hole formed through the wall so as to allow the outdoor and indoors to communicate with each other, and the mounting hole from the outdoor side when the duct body is disposed through the mounting hole. A flange portion that is provided at an outdoor end of the duct body so as to cover the duct body and holds the duct body in the mounting hole by being attached to the wall body. A plurality of slit-shaped through openings formed along the outer peripheral surface of the duct body so as to communicate with a gap formed between the outer peripheral surface of the main body and the inner peripheral surface of the mounting hole. Ventilation duct characterized by being provided.   2. The ventilation duct according to claim 1, wherein the slit-shaped through opening is an injection port for injecting a sealing filler into a gap formed between an outer peripheral surface of the main body and an inner peripheral surface of the mounting hole. Is a ventilation duct.   The ventilation duct according to claim 2, wherein when the duct body is disposed through the attachment hole, the duct body is provided with a filler stopper that is positioned near the attachment hole on the indoor side and is attached to the outer peripheral surface of the duct body. Equipped ventilation duct.   2. The ventilation duct according to claim 1, which is substantially the same as the inner peripheral portion so that an annular concave portion is formed on the outer peripheral side of the inner peripheral portion in which a slit-like through opening is formed on the back surface of the flange portion. Ventilation duct with outer ribs located at the outer periphery.   The ventilation duct according to claim 4, wherein the concave portion is a housing portion for a seal member.   5. The ventilation duct according to claim 4, wherein the outer rib is positioned on the inner side of the outer peripheral edge of the flange portion, and an annular recess is formed between the wall portion and the outer peripheral side when the flange portion is attached to the wall body. Ventilating duct.   The ventilation duct according to claim 6, wherein the annular recess is a filling portion of a sealing filler.   2. The ventilation duct according to claim 1, wherein the flange portion has a hood engaging portion for attaching a hood on the front surface.

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