JP2008298396A - Cover device for vent hole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover member which is a cover device fitted to an opening end of a vent hole penetrated through a wall body of a building to remove dust and pollens etc. in outside air and capable of taking in only fresh air into inside of a room, is easily and securely fitted, can exhibit excellent filter functions, has a simple structure and is disposable. <P>SOLUTION: The cover member 1 is three-dimensionally formed to have a dish-shaped cover main body 1a covering the vent hole A by nonwoven fabric sheet and a peripheral step part 6 continued to a rear end of the cover main body 1a to form a step shape. The peripheral step part 6 is made cover an annular fixation member provided on a wall face around the opening end on the outdoor side or the indoor side of the vent hole A, and a peripheral wall part 5 of the peripheral step part 6 is detachably secured to the outer peripheral face of the fixed member by a fixed member 10 comprising a ring-shaped rubber band. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a vent cover device for filtering dust, pollen, etc. in the outside air that is attached to an indoor opening of a ventilation hole provided in a wall of a building and taking in fresh air. It is about.

  As this type of cover device, for example, as described in Patent Document 1, a synthetic resin made of a ring-shaped cover base and a cover head that is detachably screwed to the outer peripheral surface of the cover base. A cover and a circular filter membrane provided in the cover and stretched in a state where the outer peripheral portion is sandwiched between the cover pedestal and the cover head, and the back surface of the cover pedestal is covered with a double-sided tape. The cylinder is fixed on the flange portion of the open end opened to the indoor side of the through-cylinder body inserted into the vent hole, and the outside air flowing through the through-cylinder body is filtered by a filter membrane, and then passed through the cover head to the indoor What is configured to be incorporated into is known.

Similarly, Patent Document 2 describes a filter device having various shapes and structures for detachably mounting a filter membrane on an opening end of a vent opening that is open on the indoor side. A filter formed by adhering the outer peripheral portion of the filter membrane covering the vent hole to the front end face, and removably fitting the annular member to the annular base fixed to the surrounding wall so as to surround the opening end of the vent hole. An apparatus or a simple filter device is disclosed in which a filter membrane is directly covered with an annular base and its outer peripheral portion is detachably fixed to the annular base by a fastening member such as a string.
Japanese Patent Laid-Open No. 11-137939 Registered Utility Model No. 3041766

  However, using a synthetic resin cover consisting of a cover pedestal and a cover head that is detachably screwed onto the cover pedestal, as in the former case, not only increases the cost of the product, but also places the filter membrane in the cover. Therefore, it is difficult to look directly at the filter membrane dirt from the outside, requiring additional means to determine the replacement time, and the structure becomes complicated.In addition, after removing the cover head when replacing the filter membrane In addition, since the outer peripheral portion of the new filter membrane must be disposed so as to be sandwiched between the cover head and the cover pedestal, there is a problem that the operation becomes complicated.

  Furthermore, since the filter membrane itself is not given shape retention and has flexibility, it is necessary to provide a holding frame such as a cross shape on the cover head and to support it on this holding frame. For this reason, the portion supported by the holding frame cannot function as a filter. In addition, the cover is fixed to the opening end of the vent hole by adhering the back surface of the cover base to the flange portion of the opening end of the vent hole with a double-sided tape. Then, there is a possibility that the cover may come off from the vent due to strong wind blowing.

  On the other hand, as in the latter case, the outer peripheral portion of the filter membrane covering the vent is bonded to the front end surface of the annular member, and the annular base is fixed to the surrounding wall surface so as to surround the opening end of the vent. A filter device that is detachably fitted to the filter base, or a filter device that is configured such that the filter membrane is directly covered with an annular base and the outer periphery thereof is detachably fixed to the annular base by a fastening member such as a string. Although the structure is relatively simple and the product cost can be reduced, the filter membrane still does not have shape retention. It is not only necessary to attach a fastening member such as a string to the part, but even if the annular member is simply put on the annular base around the vent, it will come off from the vent due to the circulation pressure of the outside air. On the other hand, when the filter membrane is attached to the outer peripheral surface of the annular base with a fastening member such as a string, the work is difficult due to the wall surface becoming obstructed. There is a problem that the member must be disposed of integrally with the filter membrane, leading to waste of resources.

  The present invention has been made in view of such problems, and the object thereof is the indoor side of a vent hole provided in a building having shape retention and without using a holding frame, Provided is a cover device for a vent which can be easily and surely attached to any open end on the outdoor side, can exhibit a good filter function over the entire surface, and has a simple structure and can be disposable at low cost. It is in.

  In order to achieve the above object, a vent cover apparatus according to the present invention is a vent cover apparatus penetrating a wall of a building as described in claim 1, and has a filter function. A cover member made of a non-woven fabric having a constant thickness and a ring-shaped rubber band that fixes the cover member to the vent hole. The cover member is a disc-shaped end face filter portion that closes the opening end of the vent hole and the end face filter. And an annular peripheral wall filter portion projecting rearward from the outer peripheral end of the outer peripheral end, and an outer peripheral end surface having a constant width refracted substantially perpendicularly from the rear end toward the outside at the rear end of the peripheral wall filter portion And an annular fixing member that is fixed to the opening end of the vent hole is integrally provided with a peripheral step portion formed of an annular peripheral wall portion that is refracted rearward from the outer peripheral end of the outer peripheral end surface portion. cover By covered with a circumferential stepped portion of the timber to deposit the rubber band on the outer peripheral surface of the peripheral wall portion in the circumferential stepped portion, has a structure which is detachably mounted to the cover member to the vent.

  In the cover device for a vent hole configured as described above, the invention according to claim 2 is innumerable that the inner peripheral surface of the rubber band is bitten between the fibers of the nonwoven fabric in which the peripheral wall portion of the peripheral step portion of the cover member is formed. It is characterized by providing fine protrusions.

  Furthermore, in the invention according to claim 3, the peripheral step portion of the cover member is defined as a first peripheral step portion, and a second outer periphery end surface portion and a peripheral wall portion are formed at the rear end of the first peripheral step portion. The third circumferential step portion is formed in a step shape sequentially.

  Further, as the annular fixing member according to claim 1, a ring-shaped spacer member made of a sponge material attached to the wall surface around the opening end is provided on the indoor side of the vent hole as described in claim 4. As described in claim 5, an annular peripheral wall seat portion of a metal opening frame fixed around the opening end is used at the outdoor opening end of the vent hole. And

  According to the first aspect of the present invention, the cover member made of a non-woven fabric having a constant thickness is provided so as to project backward from the disc-shaped end face filter portion that closes the opening end of the vent and the outer peripheral end of the end face filter. An annular peripheral wall filter portion, and at the rear end of the peripheral wall filter portion, from an outer peripheral end surface portion having a constant width refracted substantially perpendicularly from the rear end to the outer side, and an outer peripheral end of the outer peripheral end surface portion. Since it is formed into a three-dimensional shape that is integrally provided with a circumferential step part that is refracted toward the rear, it has shape retention and is easy to handle without using a holding frame or the like. It can be easily mounted by directly covering the peripheral step portion with an annular fixing member provided at the opening end of the vent hole, and a ring-shaped rubber band is attached to the outer peripheral surface of the peripheral wall portion of the peripheral step portion. This Since configured to secure the open end of the vent cover member, it is possible to fix the work without being disturbed by the wall of the building of the open end around the vent opening can be easily performed.

  Further, the cover member is formed by three-dimensionally molding a nonwoven fabric having a constant thickness, and is configured to be attached to the opening end of the vent as it is without using a holding frame as described above. Outside air that flows into the room by filtering the entire surface of the disc-shaped end face filter part that closes the open end of the filter and the annular peripheral wall filter part that protrudes rearward from the outer peripheral end of the end face filter part Can efficiently and uniformly remove pollen, dust, etc. contained in the entire surface, exhibit a filtering function over a long period of time, and can easily recognize the replacement time. In the case of replacement, not only can the cover member be easily removed from the vent by removing the rubber band, but the rubber band is again used for fixing the next cover member. Bets can be, also, a cover member for disposal the whole as described above is formed from a nonwoven fabric, but also can be easily its disposition with low cost disposable becomes possible.

  In addition, in the above-described vent hole that penetrates the wall of the building, the opening end that opens to the outer wall surface on the outdoor side usually has a stepped section inside the outer wall surface so as to surround the opening end. A metal opening frame with a large number of louvers integrally attached thereto is fixed, but the cover member projects an annular peripheral wall filter part from the outer peripheral end of the disk-shaped end face filter part toward the rear. And an outer peripheral end surface portion having a constant width refracted outward from the rear end of the peripheral wall filter portion, and an annular peripheral wall refracted rearward from the outer peripheral end of the outer peripheral end surface portion as described above. Since the peripheral step part consisting of a part is integrally provided, the peripheral step part is covered with the outer peripheral surface of the stepped metal opening frame from the peripheral wall filter part of this filter member, and is easily and accurately mounted. Can into the vent In which it is possible to mount the cover member against kicking outdoor side of the open end.

  According to the second aspect of the invention, the rubber band for fixing the cover member to the vent hole is provided with innumerable fine protrusions that are engulfed between the fibers of the nonwoven fabric on the inner peripheral surface thereof. In addition, when the annular fixing member provided on the wall surface around the opening end of the vent hole is covered with the peripheral wall portion of the peripheral step portion of the cover member and fixed with the rubber band, the tightening force by the rubber band on the peripheral wall portion It is possible to secure and secure the fixing.

  According to a third aspect of the present invention, the peripheral step portion of the cover member is a first peripheral step portion, and the rear end of the first peripheral step portion includes a large-diameter outer peripheral end surface portion and a peripheral wall portion. 2. Since the third circumferential step portion is formed in a stepped shape, the annular fixing member is provided with the third circumferential step portion having the maximum diameter on the wall surface around the opening end when the vent hole has a large diameter. This cover member can be easily attached to the opening end of the large-diameter vent by covering it, and if the vent has a smaller diameter than this vent, the peripheral step portion with a larger diameter is cut off. A circumferential step portion corresponding to the diameter of the annular fixing member provided on the wall surface around the opening end of the vent can be covered, and therefore, it can be applied to a large and small vent.

  Further, as the annular fixing member, a ring-shaped spacer member made of a sponge material attached to the wall surface around the opening end is used on the indoor side of the vent hole, as described in claim 4. As described in claim 5, the cover member is attached to the inner and outer wall surfaces of the chamber by using an annular peripheral wall seat of a metal opening frame fixed around the opening end. Any of these can be easily and reliably mounted.

  In addition, as the annular fixing member, a flange portion of a through-cylinder member inserted into the vent hole can be used, and when the flange portion has a smaller diameter than the inner diameter of the peripheral wall portion of the peripheral step portion of the cover member The ring-shaped spacer member is attached to the wall surface around the flange portion, so that the cover member can be attached to the opening end of the vent hole.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a vent cover device, FIG. 2 is a longitudinal side view of the cover member, and FIG. It is a vertical side view which shows the state mounted | worn with the indoor side opening end in the vent hole A penetrated in the wall body, Comprising: The cylinder member B is attached to the said vent hole A in the insertion state. In addition, an annular flange b that is in close contact with the wall surface D on the indoor side is integrally provided at the opening end that opens to the indoor side of the cylinder member B, and at the opening end on the indoor side of the cylinder member B. There is provided a known adjusting means C for adjusting the air flow rate by rotating the knob c.

  The cover device attached to the opening end of the vent hole A includes a cover member 1 made of a non-woven fabric having a constant thickness having a filter function, and a ring-shaped rubber band 10 for fixing the cover member 1 to the opening end of the vent hole A. When the flange portion b of the cylinder passing member B is thin and the outer diameter is smaller than the inner diameter of the rear end opening of the cover member 1, the cover member is adhered to the wall surface around the flange portion b. It comprises a ring-shaped spacer member 20 which is an annular fixing member for fixing 1.

  Specifically, the cover member 1 is formed by three-dimensionally forming a filter material made of a sheet-like non-woven fabric having a certain thickness, and the opening end of the vent A is spaced forward from the opening end (inside the room). A disc-shaped end face filter portion 2 that is completely closed in a state of being closed, and an annular peripheral wall filter portion 3 having a constant front and rear width (height) projecting rearward from the end face filter portion 2; The outer peripheral end surface portion 4 having a constant width in the radial direction that is refracted from the rear end of the peripheral wall filter portion 3 to the outside at a substantially right angle, and refracted at a substantially right angle from the outer peripheral end of the outer peripheral end surface portion 4 to the rear. An annular peripheral wall 5 having a constant width (height) in the front-rear direction is formed.

  In this cover member 1, the diameter of the end face filter portion 2 is formed to be slightly larger than the diameter of the vent hole A, and the peripheral wall filter portion 3 projecting rearward from the end face filter portion 2 has an end face. The plate body is bent at a right angle with respect to the surface of the filter portion 2 or slightly inclined outward, and the end-face filter portion 2 and the peripheral wall filter portion 3 serve as a dish-shaped cover body 1a. On the other hand, a peripheral step portion 6 for fixing to the opening end of the vent A is formed by the outer peripheral end face portion 4 and the annular peripheral wall portion 5.

  When the peripheral step portion 6 of the cover member 1 is fixed to the ring-shaped spacer member 20 that is the annular fixing member, the outer peripheral diameter of the ring-shaped spacer member 20 is set equal to the inner peripheral diameter of the peripheral wall portion 5. And the height (thickness) of the ring-shaped spacer member 20 is formed to be slightly larger than the height (width in the front-rear direction) of the peripheral wall portion 5, and the rear surface (inner surface) of the outer peripheral end surface portion 4 is substantially It is formed so as to be brought into contact with and received by the front end face of the ring-shaped spacer member 20 entirely. If the thin flange portion b of the cylinder member B inserted into the vent hole A has a relatively large outer diameter, a ring-shaped spacer member 20 is pasted on the flange portion b. You may wear it.

  Further, the inner peripheral shape of the peripheral step portion 5 of the peripheral wall portion 6 is fixed to the outer wall surface E (shown in FIGS. 6 to 8) of the building so as to surround the opening end opened to the outdoor side of the vent hole A. The cross section is stepped and formed in a size and shape that can be fitted into a fixing frame F1 of a metal opening frame F in which a large number of louvers f are integrally provided. The annular fixing member is used for mounting the cover member 1 on the outer wall surface of the building. Specifically, the metal opening frame F has a plurality of louvers f provided in parallel to each other in the opening end of the annular peripheral wall portion F2, and outward from the base end of the peripheral wall portion F2. A flat annular mounting end surface portion F11 is formed with a constant width between the inner and outer peripheral edges toward the outer wall E of the building. The annular peripheral wall seat portion F12 is integrally formed, and the fixing frame portion F1 is formed by the annular mounting end surface portion F11 and the annular peripheral wall seat portion F12. Therefore, it is fixed to the outer wall surface E or the flange portion b ′ in close contact with the outer wall surface E of the through-cylinder member B inserted into the vent hole A.

  The shape of the inner surface of the cover member 1 is made substantially the same as the outer shape of the metal opening frame F so that the cover member 1 is entirely covered with the metal opening frame F. That is, the inner surface of the end face filter portion 2 of the cover body 1a in the cover member 1 is formed to have the same diameter and the same size as the opening end of the metal opening frame F, and the height and inner diameter of the peripheral wall filter portion 3 are made of metal openings. It is formed to have dimensions approximately equal to the height and outer diameter of the peripheral wall portion F2 of the frame F, and the width and outer diameter of the inner surface of the outer peripheral end surface portion 4 in the peripheral step portion 6 are set to the annular mounting end surface of the metal opening frame F. The width and the diameter of the portion F11 are made equal to each other, and the height and the inner diameter of the peripheral wall portion 5 are formed to be substantially equal to the height and the outer diameter of the annular peripheral wall seat portion F12 of the metal opening frame F.

  On the other hand, the ring-shaped spacer member 20 attached to the inner wall surface D of the building so as to surround the opening end of the vent hole A opened toward the indoor side is made of a sponge material, and the adhesive layer 21 is applied to the rear end surface thereof. At the same time, the release paper 22 is detachably stuck on the pressure-sensitive adhesive layer 21. The ring-shaped rubber band 10 for fixing the cover member 1 to the opening end of the vent hole A has a smaller diameter than the outer diameter of the peripheral wall portion 5 in the peripheral step portion 6 of the cover member 1, and its inner peripheral surface. An infinite number of fine protrusions 11 are provided so as to bite into a locked state between the fibers of the nonwoven fabric forming the peripheral wall 5.

  In order to attach the cover member 1 configured as described above to the opening end of the vent hole A that opens to the indoor side, first, as shown in FIG. The ring-shaped spacer member 20 is fixed to the wall surface D around the opening end. The ring-shaped spacer member 20 is fixed by peeling off the release paper 22 attached to the rear end surface thereof to expose the adhesive layer 21, and placing the ring-shaped spacer member 20 around the opening end of the vent hole A. It can be performed by attaching the pressure-sensitive adhesive layer 21 to the wall surface D concentrically with A. In this case, the ring-shaped spacer member 20 may be stuck on the flange portion b of the through-cylinder member B inserted into the vent hole A.

  After the ring-shaped spacer member 20 is adhered and fixed to the wall surface D in this way, the peripheral step portion 6 of the cover member 1 is covered with the ring-shaped spacer member 20, and the outer peripheral end surface portion 4 of the peripheral step portion 6 is attached to the ring-shaped spacer. The peripheral wall 5 is fitted on the ring-shaped spacer member 20 while being brought into contact with and received by the front end surface of the member 20. After that, the ring-shaped rubber band 10 is expanded and covered with the peripheral wall portion 5 in the peripheral step portion 6 of the cover member 1 and then released to press the peripheral wall portion 5 in the direction of reducing the diameter of the entire peripheral wall portion 5 with its elastic contraction force. Then, the cover member 1 is fixed to the ring-shaped spacer member 20 by being crimped to the outer peripheral surface of the ring-shaped spacer member 20 (see FIGS. 3 and 5). The cover member 1 is a three-dimensional molded product, has shape retention, and is entirely formed of a non-woven fabric. Therefore, the cover member 1 is easy to handle and can be attached to the ring spacer member 20 easily and accurately, and is lightweight. Therefore, it can be firmly attached and fixed to the ring-shaped spacer member 20 by the elastic contraction force of the rubber band 10.

  As described above, when the cover member 1 is attached to the opening end opened to the indoor side of the vent A, the outside air flows into the vent A and passes through the end face filter portion 2 and the peripheral wall filter portion 3 of the cover member 1. In addition, impurities such as pollen and dust contained in the outside air are captured and removed by the filter parts 2 and 3, and only fresh air flows into the room. At this time, the cover member 1 has its end face filter portion 2 formed to have a diameter larger than the opening diameter of the vent hole A and the peripheral wall filter portion 3 between the opening end of the vent hole A and the inner surface of the end face filter portion 2. In addition, the end face filter part 2 and the peripheral wall filter part 3 are not supported by a shape retaining frame or the like, so that the filtering function can be exhibited uniformly over the entire surface. The capture area is extremely large and can be used for a long time.

  When the cover member 1 is to be replaced, the cover member 1 attached to the ring-shaped spacer member 20 can be easily removed by removing the rubber band 10 and a new cover member 1 can be used as described above. After attaching to the ring-shaped spacer member 20, the rubber band 10 can be used for easy fixing. In addition, when the flange part b of the cylinder member B inserted in the vent hole A is thick and formed with an outer diameter that can fix the peripheral step part 6 of the cover member 1, a ring shape The ring-shaped spacer member 20 is not necessarily required because the flange portion b can be covered with the peripheral step portion 6 of the cover member 1 and fixed by the rubber band 10 without using the spacer member 20.

  Next, FIGS. 6 to 8 show a state in which the cover member 1 is attached to the opening end opened to the outside of the vent hole A. In this case, the peripheral step portion 6 of the cover member 1 is shown. Is attached to the fixing frame portion F1 of the metal opening frame F fixed to the outer wall surface E around the opening end of the vent hole A, and the peripheral wall portion 5 of the peripheral step portion 6 is formed into an annular shape of the fixing frame portion F1. The peripheral wall seat portion F12 is fitted and the inner surface of the outer peripheral end surface portion 4 is brought into contact with and received by the annular mounting end surface portion F11. Further, the peripheral wall filter portion 3 in the cover body 1a of the cover member 1 is attached to the metal opening frame F. The end face filter portion 2 is overlapped with the opening end face of the metal opening frame F and covered with the peripheral wall portion F1 to cover the opening end. After that, the ring-shaped rubber band 10 is expanded and covered with the peripheral wall portion 5 in the peripheral step portion 6 of the cover member 1 and then released to press the peripheral wall portion 5 in the direction of reducing the diameter of the entire peripheral wall portion 5 with its elastic contraction force. Then, the cover member 1 is attached and fixed to the metal opening frame F by being crimped to the outer peripheral surface of the annular peripheral wall seat portion F12 of the metal opening frame F.

  When the cover member 1 is thus attached to the open end on the outdoor side of the vent hole A, pollen, dust and the like contained in the outside air are captured by the end face filter portion 2 of the cover member 1 and only fresh air is contained in the vent hole A. It can be taken into the room from the opening end of the vent A that flows into the room and opens to the indoor side.

  In the above embodiment, the cover member 1 corresponding to the size of the ventilation hole A is used. However, the ventilation hole penetrating the wall of the building has a large, medium, and small diameter. Since only the cover member 1 corresponding to its size may be employed as described above, the structure of the cover member that can be attached to any of these vent holes having different diameters is provided. It can also be set as

  FIG. 9 is a side view of the cover member 1 ′, and the cover member 1 ′ is formed by three-dimensionally molding a filter material made of a sheet-like non-woven fabric having a certain thickness, similar to the cover member 1. Thus, the front half is formed in the same shape as the cover member 1 shown in FIGS. 1 and 2, and the rear half is formed in the circumferential steps 7 and 8 which are sequentially formed in a large diameter.

  Specifically, the front half of the cover member 1 ′ has a disk-shaped end face filter portion 2 ′ formed to have a diameter capable of covering the opening end of the smallest diameter vent and the end face filter portion 2 An annular peripheral wall filter portion 3 'having a certain front and rear width (height) projecting rearward from' and refracted substantially perpendicularly from the rear end of the peripheral wall filter portion 3 'to the outside. An outer peripheral end face portion 4 ′ having a constant width in the radial direction, and an annular peripheral wall having a constant width (height) in the front-rear direction that is refracted substantially perpendicularly toward the rear from the outer peripheral end of the outer peripheral end face portion 4 ′. Part 5 ′ is formed, and the outer peripheral end surface part 4 ′ and the annular peripheral wall part 5 ′ form the peripheral step part 6 ′, while the latter half part is the peripheral step part. 6 'is a first circumferential step portion, and the rear end portion of the first circumferential step portion 6' includes an outer peripheral end surface portion 7a and a peripheral wall portion 7b having a diameter larger than that of the first circumferential step portion 6 '. Two circumferential step portions 7 are continuously provided, and an outer peripheral end surface portion 8a and a peripheral wall portion 8b having a diameter larger than that of the second peripheral step portion 7 are formed at the rear end of the peripheral wall portion 7b of the second peripheral step portion 7. The third circumferential step portion 8 is provided continuously.

  When the cover member 1 ′ thus configured is attached to the opening end of the large-diameter vent A 1, the opening end of the vent A 1 that opens the third circumferential step 8 on the wall surface on the outdoor side is provided. Attached to the metal opening frame F fixed to the periphery as shown in FIG. The cover member 1 ′ may be attached to the vent A1 that is open on the wall surface on the indoor side, but the cover member 1 ′ is attached in a state of largely protruding from the wall surface. Since there exists a possibility of damaging by the collision with a thing, it is attached to an outdoor side as mentioned above.

  For the attachment, the second half of the cover member 1 'is covered with the metal opening frame F, and the peripheral wall portions 7b, 8b of the second and third peripheral step portions 7, 8 are connected to the peripheral wall portion of the metal opening frame F. The outer peripheral end surface portions 7a and 8b of the second and third peripheral step portions 7 and 8 are fitted to the F2 and the annular peripheral wall seat portion F12 of the fixing frame portion F1, respectively, and the outer periphery of the opening end surface of the metal opening frame F. And the annular mounting end face portion F11 in the fixing frame portion F1 are brought into contact with and received. Next, the ring-shaped rubber band 10 is expanded and covered with the peripheral wall portion 8b of the third peripheral step portion 8 of the cover member 1 and then released in a direction in which the peripheral wall portion 8b is fully reduced in diameter by its elastic contraction force. The cover member 1 is attached to and fixed to the metal opening frame F by pressing and crimping to the outer peripheral surface of the annular peripheral wall seat portion F12 of the metal opening frame F.

  Further, when mounting at the opening end of the vent having a smaller diameter than the vent A1, first, as shown in FIG. 11, the latter half of the cover member 1 ′ is cut by a cutter to form the latter half. The second and third circumferential steps 7 and 8 are discarded. Then, like the cover member 1 shown in FIGS. 1 to 3 in the above embodiment, the first circumferential step portion 6 ′ is attached to the rear end of the cover body 1a ′ composed of the end face filter portion 2 ′ and the peripheral wall filter portion 3 ′. The cover member 1 ″ is integrally formed.

  In order to attach this cover member 1 '' to the opening end of the vent opening that opens to the indoor side, a ring-shaped spacer member 20 is used as an annular fixing member in the same manner as the mounting structure shown in FIG. After this ring-shaped spacer member 20 is adhered and fixed to the inner wall surface around the opening end of the vent, the circumferential step portion 6 'of the cover member 1' 'is covered with the ring-shaped spacer member 20, and the ring-shaped spacer member 20 The peripheral wall portion 5 ′ fitted on the outer peripheral surface may be elastically tightened and fixed by the rubber band 10. Further, when the cover member 1 '' is attached to the opening end of the vent opening that opens to the outdoor side, the metal opening frame F is attached in the same manner as the attachment method shown in FIGS. Just install it.

  Further, when the cover member 1 ′ is attached to the opening end of the vent hole having a smaller diameter than the vent hole, the cover member 1 ′ is left with the cover main body 1a ′ composed of the end face filter portion 2 ′ and the peripheral wall filter portion 3 ′. In order to cut out the first to third circumferential step portions 6 ', 7, and 8 and attach the cover body 1a' to the opening end of the vent opening that opens to the indoor side, the cover body 1a 'is stuck around the opening end. After attaching and fixing the ring-shaped spacer member to the inner wall surface around the opening end of the vent hole using the small-diameter ring-shaped spacer member to be obtained, the cover body 1a ′ is put on the ring-shaped spacer member 20, and this ring The peripheral wall filter portion 3 fitted on the outer peripheral surface of the spacer member may be elastically tightened and fixed by the ring-shaped rubber band 10. Further, when the cover body 1a ′ is attached to the opening end of the vent opening that opens to the outdoor side, the cover body 1a ′ is attached to the peripheral wall portion of the small-diameter metal opening frame fixed around the opening end. It is only necessary to cover 1a ′ and elastically tighten and fix the ring-shaped rubber 10.

The disassembled perspective view of the cover apparatus for ventilation holes. The longitudinal side view of the cover member. The longitudinal side view which shows the state with which the indoor side opening end of the ventilation port was mounted | worn. The disassembled perspective view which shows the mounting | wearing aspect. The perspective view of the mounted state. The vertical side view which shows the state with which the outdoor opening end of the ventilation port was mounted | worn. The disassembled perspective view which shows the mounting | wearing aspect. The perspective view of the mounted state. The side view which shows other embodiment of a cover member. The vertical side view which shows an example of the use condition. The side view of the state which removed a part in order to mount | wear with a small diameter vent.

Explanation of symbols

A Vent 1 Cover member 2 End face filter part 3 Perimeter wall filter part 4 Outer end face part 5 Perimeter wall part 6 Peripheral step part
10 Annular rubber band
20 Ring-shaped spacer member

Claims (5)

  A cover device for a ventilation hole penetrating a wall of a building, comprising a cover member made of a non-woven fabric having a constant thickness having a filter function, and a ring-shaped rubber band for fixing the cover member to the ventilation port, The cover member has a disc-shaped end face filter portion that closes the opening end of the vent hole and an annular peripheral wall filter portion that protrudes rearward from the outer peripheral end of the end face filter. A circumferential step portion comprising an outer peripheral end surface portion having a constant width refracted substantially perpendicularly from the rear end toward the outside and an annular peripheral wall portion refracted rearward from the outer peripheral end of the outer peripheral end surface portion at the rear end. Is formed integrally, and the annular fixing member fixed to the opening end of the vent is covered with the peripheral step portion of the cover member, and the rubber band is attached to the outer peripheral surface of the peripheral wall portion of the peripheral step portion. thing More, vent cover apparatus characterized by being detachably mounted to the cover member to the vent.   The vent cover according to claim 1, wherein innumerable fine protrusions are provided on the inner peripheral surface of the rubber band so as to bite between the fibers of the nonwoven fabric forming the peripheral wall portion of the peripheral step portion of the cover member. apparatus.   The peripheral step portion of the cover member is used as the first peripheral step portion, and the second and third peripheral step portions including a large-diameter outer peripheral end surface portion and a peripheral wall portion are sequentially formed in a step shape at the rear end of the first peripheral step portion. The vent cover apparatus according to claim 1, wherein the vent cover apparatus is provided.   The vent cover device according to claim 1, wherein the annular fixing member is a ring-shaped spacer member made of a sponge material attached to a wall surface around the indoor side opening end of the vent.   The vent cover device according to claim 1, wherein the annular fixing member is an annular peripheral wall seat portion of a metal opening frame that is fixed around the outdoor opening end of the vent.

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