JP5917189B2 - Ventilator - Google Patents

Description

  The present invention relates to a ventilation device such as a ventilation fan or a ventilation hood, which has an insertion portion inserted into an end portion of a ventilation pipe facing a wall hole and is attached to the ventilation pipe.

Vacant rooms such as apartments and condominiums need to be regularly ventilated by changing the room air. The room is ventilated by opening it. However, it was troublesome to go to an empty room and change the room air.
Therefore, Patent Document 1 discloses a technique in which a wiring hole of an existing air conditioner and a wall hole for piping are used as a ventilation pipe, a ventilation fan is attached thereto, and ventilation is performed using a solar cell. According to this ventilation fan, since the ventilation is basically always performed by the solar cell, it is not necessary to regularly go to an empty room and replace the air.

  Here, the ventilation fan attached to the ventilation pipe is provided with an elastic piece such as a spring bent in a cross-sectional shape on the outer surface of the cylindrical insertion portion of the ventilation fan as described in Patent Document 2, for example. It was attached to the inner surface of the cylindrical ventilation pipe by its elastic restoring force.

JP 2009-109043 A Japanese Patent No. 4112788 (FIG. 15)

  By the way, in order to firmly attach the ventilation fan to the ventilation pipe with this kind of elastic piece, it is necessary to increase the tension force of the elastic piece, and therefore it is necessary to increase the length of the elastic piece. Similarly, in order to attach a ventilation fan corresponding to the diameter of the ventilation pipe, it is necessary to increase the length of the elastic piece.

  However, the elastic piece has a base end joined to the outer surface of the cylindrical insertion portion of the ventilation fan, and protrudes in the axial direction of the ventilation pipe, that is, in the axial direction of the insertion portion of the ventilation fan. For this reason, if the elastic piece is lengthened, it is necessary to lengthen the insertion part of the ventilation fan, the amount of insertion into the ventilation pipe becomes large, the entire ventilation fan becomes large, handling becomes inconvenient during installation, transportation, storage, etc. It was inconvenient.

  In addition, a ventilation hood may be attached to the back side of the wall in addition to a ventilation fan as a ventilation device attached to the end of the ventilation pipe. There are things that attach to the inner surface of the pipe, but when the ventilation hood and fan are attached to both ends of the ventilation pipe, if you set each elastic piece longer to increase the tension strength, In some cases, the insertion ends could interfere with each other in the ventilation pipe.

  Furthermore, the large-diameter insertion portion and the small-diameter insertion portion are shifted in the axial direction of the ventilation pipe so that they are installed in parallel with a single ventilation fan corresponding to two types of large and small ventilation pipes with different diameters. When thinking about things, when this is attached to a small-diameter ventilation pipe, the portion of the large-diameter insertion portion will protrude to the front side of the wall, which is outside the ventilation pipe. At that time, if the elastic piece provided in the large-diameter insertion portion is set to be long like the above, the large-diameter insertion portion will protrude greatly from the end of the ventilation pipe to the wall surface. The appearance on the indoor side will be significantly reduced.

  Therefore, the present invention is accompanied by increasing the length of the elastic piece pressed against the inner surface of the ventilation pipe in order to increase the attachment strength to the ventilation pipe or to attach the ventilation pipe corresponding to the diameter of the ventilation pipe. An object of the present invention is to provide a ventilator that can prevent an axial length of an insertion portion that is provided with the elastic piece and is inserted into an end portion of a ventilation pipe from increasing.

The ventilator according to claims 1 and 2 has an insertion portion inserted into an end portion of the ventilation pipe , one end side is joined to the outer surface of the insertion portion, and the other end side projects outward from the internal space of the ventilation pipe, An elastic piece that is sometimes bent inward of the ventilation pipe and pressed against the inner surface of the ventilation pipe by an elastic return force is provided, and the elastic piece has a direction extending from the one end side to the other end side in the insertion portion. And the insertion direction back side end in the width direction is inclined toward the front side in the insertion direction from the one end side to the other end side.
The ventilator according to claim 2 is further provided with a small-diameter insertion portion corresponding to the small-diameter ventilation pipe on the back side in the insertion direction so that the insertion portion is inserted corresponding to the two types of large and small ventilation pipes having different diameters. A large-diameter insertion portion corresponding to the large-diameter ventilation pipe is provided on the front side in the insertion direction, and the small-diameter ventilation is provided between the small-diameter insertion portion and the large-diameter insertion portion adjacent in the insertion direction. A regulation step portion is provided that is inserted into the pipe and abuts against the opening end of the small-diameter ventilation pipe to restrict insertion.

  In the first aspect of the invention, since the direction extending from one end side to the other end side of the elastic piece is formed in the circumferential direction of the insertion portion and the ventilation pipe, the attachment strength of the ventilation device to the ventilation pipe is increased. Alternatively, even if the length of the elastic piece provided at the insertion portion and pressed against the inner surface of the ventilation pipe is increased in order to be attached corresponding to the diameter of the ventilation pipe, the axial direction of the ventilation pipe at the insertion portion The length does not change. That is, the insertion amount of the insertion portion into the ventilation pipe can be reduced while the elastic piece is set to be long in order to ensure the elastic force of the elastic piece and to correspond to the diameter of the ventilation pipe. As a result, the ventilation fan can be easily handled when inserted into the ventilation pipe, and the insertion work can be performed smoothly and easily. Also, the ventilation fan is reduced in size and weight, and management and storage are facilitated. In addition, when attaching ventilation fans and ventilation hoods as ventilation equipment to both ends of the ventilation pipe across the wall, it prevents the insertion part of the ventilation equipment and the tip of the elastic piece from interfering with each other to prevent installation. it can.

  In the invention of claim 2, since the direction extending from one end side to the other end side of the elastic piece provided at least in the large-diameter insertion portion is formed in the circumferential direction of the large-diameter insertion portion and the ventilation pipe, the diameters are different. In the ventilation fan corresponding to two types of large and small ventilation pipes, even if the elastic piece is set to be long as in the case of claim 1, at least the axial length of the large-diameter insertion portion is not changed and becomes short. Thereby, when a ventilation fan is attached to a small diameter ventilation pipe, the length which a large diameter insertion part protrudes from the edge part of a ventilation pipe to a wall surface can be made small. As a result, it is possible to prevent the appearance on the indoor side from deteriorating.

According to the first and second aspects of the present invention, the end portion in the insertion direction in the width direction of the elastic piece provided in the circumferential direction of the insertion portion inserted in the end portion of the ventilation pipe extends from the one end side to the other end side in front of the insertion direction. Even if the other end protrudes outward from the interior space of the ventilation pipe before installation, the first end is inserted into the ventilation pipe first, and then inserted in the extended part. The rear end portion in the direction is pushed in and inserted into the ventilation pipe so as to be guided to the inner space while sequentially contacting the opening end of the ventilation pipe. Therefore, the elastic piece is smoothly inserted into and attached to the ventilation pipe without the insertion end being obstructed by the rear end of the insertion direction being held by the opening end of the ventilation pipe.

It is the perspective view which looked at the ventilation fan of embodiment of this invention from the front side. 1 shows the ventilation fan of FIG. 1, (a) is a perspective view seen from the back side, (b) is a front view, (c) is a right side view, (d) is a rear view, and (e) is an A- of (d). It is sectional drawing by A cutting line. 2 shows the ventilation fan body of FIG. 2, (a) is a perspective view seen from the front side, (b) is a perspective view seen from the back side, (c) is a front view, (d) is a right side view, (e) is ( It is sectional drawing by the BB cutting line of c). 2A is a perspective view seen from the front side, FIG. 2B is a perspective view seen from the back side, FIG. 2C is a front view, and FIG. 2D is a right side view. 2 shows the fan of FIG. 2, (a) is a perspective view seen from the front side, (b) is a perspective view seen from the back side, (c) is a front view, (d) is a right side view, and (e) is (c) It is sectional drawing by the CC cutting line. (a) is a side view which shows the state which attached the ventilation fan of FIG. 1 to the large diameter ventilation pipe, (b) is a side view which shows the state attached to the small diameter ventilation pipe. It is a side view which shows the state which attached the ventilation hood and the ventilation fan of FIG. 1 to the ventilation pipe. 7 shows the ventilation hood of FIG. 7, (a) is a perspective view seen from the front side, (b) is a perspective view seen from the back side, (c) is a front view, and (d) is a right side view. It is a side view which shows the state which attached the conventional ventilation fan and ventilation hood to the ventilation pipe. It is a side view which shows the state which attached the conventional ventilation fan to the small diameter ventilation pipe. The modification of the large diameter side elastic piece of FIG. 1 is shown, (a) is a principal part expansion perspective view, (b) is sectional drawing by the DD cut | disconnection line of (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2, a ventilation fan 1 as a ventilator is attached to an end of a cylindrical ventilation pipe 71 facing a wall hole 75 formed in a wall 74 of an apartment, an apartment, etc., and the ventilation fan 1 has a diameter. The main body 2 of the ventilation fan 2 has a shape in which two types of large and small cylindrical portions are arranged coaxially in the axial direction, the filter 41 attached to the opening end of the large-diameter cylindrical portion, It is comprised with the fan 51 accommodated in the inside of the cylindrical part of a diameter side.

  As shown in FIG. 3, the ventilation fan body 2 corresponds to the small-diameter ventilation pipe 71 on the back side in the insertion direction, that is, the insertion tip side in order to be inserted corresponding to two types of large and small ventilation pipes 71 having different diameters. A small-diameter insertion portion 11 composed of a small-diameter cylindrical portion to be inserted is provided, and a large-diameter composed of a large-diameter cylindrical portion inserted corresponding to the large-diameter ventilation pipe 71 on the front side in the insertion direction, that is, on the rear end side of insertion An insertion portion 21 is provided. At the boundary between the small-diameter insertion portion 11 and the large-diameter insertion portion 21 adjacent to each other in the insertion direction, when the small-diameter insertion portion 11 is inserted into the small-diameter ventilation pipe 71, the small-diameter ventilation pipe 71 contacts the open end 73. A regulation step 31 is formed in contact with which further insertion is regulated. The ventilation fan body 2 is integrally formed of synthetic resin. The ventilation fan body 2 may be formed of a metal plate or the like.

  Further, one end side of each of the small-diameter insertion portion 11 and the large-diameter insertion portion 21 is joined to the outer surface of these insertion portions, and the other end side protrudes outward from the internal space of the ventilation pipe 71, and ventilation is performed when attaching to the ventilation pipe 71. An elastic piece that is elastically bent inward of the pipe 71 and is pressed against the inner surface 72 of the ventilation pipe 71 by an elastic restoring force is provided.

  Among these, the small-diameter side elastic pieces 13 provided in the small-diameter insertion portion 11 are provided at four locations on the outer surface 12 of the small-diameter insertion portion 11 at equal intervals in the circumferential direction, and one end side thereof is on the outer surface 12 of the small-diameter insertion portion 11. It is joined near the back end in the insertion direction, and the other end is extended toward the front in the insertion direction, that is, the direction extending from one end to the other end is from the back to the front. The ventilation pipe 71 and the small diameter insertion portion 11 are provided in the axial direction. Each small-diameter side elastic piece 13 is formed in a rectangular plate shape having a constant width so that the outer surface 12 of the small-diameter insertion portion 11 is cut and raised in a U-shape leaving one end portion, and is externally formed from the vicinity of the end portion on the back side in the insertion direction. After inclining so as to protrude in the direction, it is bent in a substantially square shape in the middle of the length direction, and thereafter extends substantially parallel to the outer surface 12 of the small-diameter insertion portion 11. However, the small diameter side elastic piece 13 does not need to be bent in a square shape. The small-diameter elastic piece 13 may have a flat plate shape as shown in FIG. 2, or a cross-sectional arc plate having a curvature matched to the inner surface 72 of the ventilation pipe 71 and the outer surface 12 of the small-diameter insertion portion 11. It is good also as a shape.

  Next, the large-diameter side elastic pieces 23 provided in the large-diameter insertion portion 21 are provided at four positions on the outer surface 22 of the large-diameter insertion portion 21 at equal intervals in the circumferential direction, that is, in the direction orthogonal to the axial direction of the ventilation pipe 71. In addition, after one end side of each outer surface 22 of the large-diameter insertion portion 21 is joined to the outer surface 22, the joint portion serves as a base end portion and extends in the circumferential direction of the outer surface 22 of the large-diameter insertion portion 21. That is, the direction extending from one end side which is the base end portion to the other end side which is the open end portion is formed in the circumferential direction orthogonal to the axial direction of the large-diameter insertion portion 21 and the ventilation pipe 71.

  The large-diameter side elastic piece 23 is provided in a shape such that the outer surface 22 of the large-diameter insertion portion 21 is cut and raised in a U shape leaving one end, and when pressed against the inner surface 72 of the ventilation pipe 71, The part can also be fitted into the space 24 shaped as if it was cut and raised. The large-diameter side elastic piece 23 is formed in a curved surface in the extending direction in the same manner as the shape of the outer surface 22 of the large-diameter insertion portion 21, and the curvature of the outer surface is substantially the same as the outer surface 22 of the large-diameter insertion portion 21. Yes, when the large-diameter insertion portion 21 is inserted into the ventilation pipe 71 and the large-diameter elastic piece 23 comes into pressure contact with the inner surface 72 of the ventilation pipe 71, the curvature of the inner surface 72 of the ventilation pipe 71 is substantially the same. You can also. As a result, when the four large diameter elastic pieces 23 are inserted into the ventilation pipe 71, the four large diameter elastic pieces 23 are surrounded by the ventilation pipe 71 in a cylindrical shape, and in some cases, the entire outer surface is almost uniformly distributed on the inner surface 72 of the ventilation pipe 71. Press contact. In that case, the pressure contact area with the inner surface 72 of the ventilation pipe 71 increases, and the pressure contact strength also increases. The curvature of the large diameter side elastic piece 23 is not necessarily the same as that of the outer surface 22 of the large diameter insertion portion 21.

  The large-diameter elastic piece 23 is formed so that the width of the joint with the large-diameter insertion portion 21 on one end side is substantially the same as the axial length of the large-diameter insertion portion 21. Further, the extending length in the circumferential direction from one end side to the other end side of the large-diameter side elastic piece 23 is formed longer than the width of the base end portion 25 on one end side, and strongly stretches to the inner surface 72 of the ventilation pipe 71. The length is sufficient to be pressed. Furthermore, the large-diameter side elastic piece 23 is inclined in a straight line from the one end side to the other end side in the insertion direction back end portion 27 in the width direction, and the width gradually increases from one end side to the other end side. It is narrow and tapered.

  Next, the regulation step portion 31 formed at the boundary between the small diameter insertion portion 11 and the large diameter insertion portion 21 has a circular plate-shaped guide plate 32 of a predetermined length on the surface on the small diameter insertion portion 11 side in the circumferential direction. It is erected in four places at equal intervals. In addition, the regulating step portion 31 is formed with a locking recess 33 that is cut out in a U-shape, and positioning pieces 34 are erected at four locations on the surface on the wall surface side. The guide plate 32 engages with a mounting leg 46 of a filter 41, which will be described later, protruding from the locking recess 33 of the regulating step 31 to the back in the insertion direction when the ventilation fan 1 is attached to the ventilation pipe 71. In order to prevent the cover sheet 46 from hitting the wall 74 and damaging the cover sheet, the stop protrusion 46 a comes into contact with the wall 74 or the open end 73 of the ventilation pipe 71 and is locked in the gap between the regulation step portion 31 and the wall 74. The convex part 46a is accommodated. Therefore, the standing height of the guide plate 32 is formed to be larger than the length in which the locking projection 46 a of the filter 41 protrudes from the locking recess 33 of the regulation step portion 31 to the back side in the insertion direction.

  Next, as shown in FIG. 4, the filter 41 is formed in a substantially annular plate shape, and the circular hole portion at the center of the annular plate portion 42 is integrally covered with a filter portion 43 having a vertical and horizontal lattice shape. ing. A flange 44 having a predetermined height is provided on the peripheral edge of the annular plate portion 42 so as to extend in the entire circumferential direction so as to be perpendicular to the annular plate portion 42 and on the front side, that is, on the front side in the insertion direction. Reinforcing ribs 45 are provided on the inner surface of the flange 44 at equal intervals in the circumferential direction. In addition, four attachment legs 46 project from the peripheral edge of the back surface side of the annular plate portion 42 at equal intervals in the circumferential direction in a direction opposite to the flange 44, that is, toward the back in the insertion direction. The filter 41 can be freely attached to and detached from the internal space of the large-diameter insertion portion 21 of the ventilation fan body 2 by the engagement protrusion 46 a at the tip of the landing leg 46 being engaged with the engagement recess 33 of the regulation step portion 31 of the ventilation fan body 2. Installed and housed in.

  The outer surface 22 of the large-diameter insertion portion 21 has spaces 24 that are cut and raised at four locations where the large-diameter elastic pieces 23 are provided, so that the opening end peripheral portion 26 on the front side in the insertion direction is formed. Although the structural strength and rigidity may be reduced, the filter 41 is accommodated therein, and the entire outer wall of the flange 44 is in contact with and supported by the inner surface 22 of the large-diameter insertion portion 21. The end peripheral portion 26 is prevented from being deformed.

  As shown in FIG. 5, the ventilation fan 51 is configured such that a blade 53 is accommodated in a rectangular frame 52 and the operation is stopped by a switch 54. The fan 51 is accommodated after the corners of the four corners of the rectangular frame 52 are aligned and accommodated on the inner side of the positioning piece 34 erected on the surface of the wall of the regulating step 31 of the ventilation fan body 2. When the filter 41 is attached from the front side, the filter 41 is sandwiched between the filter 41 and the regulation step portion 31 of the ventilation fan main body 2, and is attached and accommodated inside the large-diameter insertion portion 21 of the ventilation fan main body 2. . Therefore, the regulation step portion 31 also functions as a holding means for holding the fan 51 together with the filter 41, and the fan 51 is held at a fixed position with a simple configuration. As a power source of the fan 51, a general household power source can be used, and a solar cell having a power storage function can also be used. When the solar cell is used, it is suitable for ventilation of an empty room such as an apartment or an apartment. . The fan 51 is accommodated in the large-diameter insertion portion 21, but is not limited to this, and may be accommodated in the small-diameter insertion portion 11, or accommodated at a position straddling both insertion portions. You can also

  Next, the ventilation fan 1 of the present embodiment configured as described above can be attached to the large-diameter and small-diameter ventilation pipes 71. First, when attaching the ventilation fan 1 to the large-diameter ventilation pipe 71, the entire ventilation fan 1 is inserted into the large-diameter ventilation pipe 71 with the small-diameter insertion portion 11 at the top. Then, the large-diameter elastic piece 23 is elastically bent toward the inner space side around the proximal end 25 on one end side that is pressed against the inner surface 72 of the ventilation pipe 71 and joined to the outer surface 22 of the large-diameter insertion portion 21. After being accommodated in the ventilation pipe 71, it is stretched and pressed against the inner surface 72 of the ventilation pipe 71 by an elastic restoring force. Thereby, the ventilation fan 1 is accommodated in the ventilation pipe 71 with a large diameter as a whole, as shown to Fig.6 (a). Here, the circumferential direction, that is, the extending direction portion of the large-diameter side elastic piece 23 is curved, and when the curvature of the outer surface is inserted into the large-diameter ventilation pipe 71, the inner surface 72 of the ventilation pipe 71. Is formed so as to be substantially the same as the curvature, the entire outer surface presses against the inner surface 72 of the ventilation pipe 71 almost uniformly, and the ventilation fan 1 is stably attached. In FIG. 6 (a), a gap is formed between the outer surface 22 of the large-diameter insertion portion 21 and the inner surface 72 of the ventilation pipe 71. In this portion, the large-diameter elastic piece 23 is provided. This is because the large-diameter elastic piece 23 is in pressure contact with the inner surface 72 of the ventilation pipe 71 on the back side of the large-diameter insertion portion 21 in FIG. After attachment, putty material is packed between the open end 73 of the ventilation pipe 71 and the wall hole 75.

  Here, the large-diameter side elastic piece 23 has an insertion direction back side end portion 27 inclined linearly from one end side to the other end side in a straight line direction, and the width gradually increases from one end side to the other end side. It is narrower. For this reason, even if the other end side protrudes outward from the internal space of the ventilation pipe 71 before attachment, first, the one end side which is the base end portion 25 and is closer to the internal space side than the inner surface 72 of the ventilation pipe 71 is After being inserted into the ventilation pipe 71, the rear end 27 in the insertion direction in the subsequent extending portion is pushed into the ventilation pipe 71 so as to be guided to the inner space side while sequentially contacting the opening end 73 of the ventilation pipe 71. It will be inserted into. Therefore, even if the other end side of the large-diameter-side elastic piece 23 protrudes outward from the internal space of the ventilation pipe 71, the insertion-side end 27 in the insertion direction in the extended portion is held by the opening end 73 of the ventilation pipe 71. The whole is smoothly inserted and attached into the ventilation pipe 71 without being blocked.

  Next, when the ventilation fan 1 is attached to the small-diameter ventilation pipe 71, the small-diameter insertion portion 11 is inserted into the small-diameter ventilation pipe 71 as shown in FIG. Then, the small diameter side elastic piece 13 is elastically returned to the inner space side of the ventilation pipe 71 after being elastically bent and accommodated with the base end portion 15 on one end side joined to the outer surface 12 of the small diameter insertion portion 11 as an axis. The square-shaped bent portion is pressed against the inner surface 72 of the ventilation pipe 71 by force. And if the regulation step part 31 contact | abuts to the opening end 73 of the ventilation pipe 71, the further approach will be blocked | prevented. Thereby, the large diameter insertion part 21 protrudes in the state exposed to the wall surface side, as shown in FIG.6 (b). Thereafter, putty material is packed between the open end 73 of the ventilation pipe 71 and the wall hole 75.

  6 (a) and 6 (b) show a case where only the ventilation fan 1 is attached to the ventilation pipe 71. In addition to the ventilation fan 1, the ventilation pipe 71 has an opposite end portion. A ventilation hood as a ventilation device may be attached, which is shown in FIG. In FIG. 7, the ventilation fan 1 is attached to the indoor side and the ventilation hood 61 is attached to the outdoor side, and the entire ventilation fan 1 is accommodated and attached in the ventilation pipe 71. Here, as shown in FIG. 8, the ventilation hood 61 includes a cover portion 62 that is open at the bottom and disposed outdoors, and a cylindrical attachment portion 63 that is inserted into the ventilation pipe 71. Yes. A plurality of elastic pieces 65 are provided on the outer surface 64 of the attachment portion 63 at equal intervals in the circumferential direction, and at three locations in FIG. The elastic piece 65 is formed in a strip shape having a constant width, similarly to the small-diameter elastic piece 13 of the ventilation fan 1, and one end side is joined in the vicinity of the end in the insertion direction when viewed from the back side of the wall, and the other end is in front of the insertion direction. It extends in the axial direction of the attachment portion 63 and the ventilation pipe 71 toward the side, and is bent in a square shape at substantially the middle in the length direction. Further, the lower part of the opening on the back side in the insertion direction in the attachment portion 63 is closed with a draining shielding plate 66 for preventing rainwater from entering.

Next, the operation of the ventilation fan 1 will be described.
In the ventilation fan 1, the direction extending from one end side to the other end side of the elastic piece is formed in the circumferential direction of the insertion portion and the ventilation pipe 71, so that the elasticity of the elastic piece is ensured and ventilation to the ventilation pipe 71 is performed. In order to increase the attachment strength of the device, or to attach according to the diameter of the ventilation pipe 71, a long elastic piece is provided in the insertion portion and pressed against the inner surface 72 of the ventilation pipe 71. However, the axial length of the insertion portion remains the same and is short. In other words, each elastic piece can be lengthened while the amount of insertion into the ventilation pipe 71 is maintained.

  As a result, since the insertion portion is short, it is easy to handle when inserting the ventilation fan 1 into the ventilation pipe 71 in FIG. 6 (a) and the like, and the insertion operation can be performed smoothly and easily. And weight reduction, making management and storage easier. Further, when the ventilation fan 1 and the ventilation hood 61 are attached to both ends of the ventilation pipe 71 with the wall 74 interposed therebetween, the tips of the insertion parts of these ventilation equipments interfere with each other, so that these ventilation equipments are attached. Can be prevented from becoming impossible.

  That is, as shown in FIG. 9, the conventional ventilation fan 81 has a large-diameter elastic piece 83 because the large-diameter elastic piece 83 of the large-diameter insertion portion 82 extends in the axial direction from one end side to the other end side. If 83 is set longer, the attachment part 63 of the ventilation hood 61 is set longer, or the thickness of the wall 74 is smaller, the distal end of the small-diameter insertion part 11 of the ventilation fan 81 is connected to the ventilation hood 61. Interfering with the shielding plate 66 at the distal end of the attachment portion 63 of the attachment portion 63 may cause a situation in which these ventilation devices cannot be attached to the ventilation pipe 71.

  However, the large-diameter elastic piece of the large-diameter insertion portion of the ventilation fan is usually larger in extension length than the width. In the case of the large-diameter elastic piece 23 of the present embodiment, the other end side is from one end side. 7 is formed in the circumferential direction of the large-diameter insertion portion 23 and the ventilation pipe 71, the axial length L1 of the large-diameter insertion portion 21 shown in FIG. 7 is the conventional large diameter shown in FIG. The axial length L2 of the insertion portion 82 is smaller. Therefore, as shown in FIG. 7, it is possible to prevent the ventilation fan 1 and the ventilation hood 61 from interfering with each other at the insertion portion. The difference from the prior art increases as the large-diameter elastic piece is lengthened to increase the tension force on the inner surface 72 of the ventilation pipe 71. Note that the small-diameter elastic piece 13 protrudes further from the back end of the small-diameter insertion portion 11 of the ventilation fan 1 to the outside in the axial direction, or the elastic piece 65 of the ventilation hood 61 further extends outward in the axial direction from the back end of the attachment portion 63. In the case where the elastic pieces protrude to each other, the elastic pieces or the elastic pieces and the small diameter insertion portion 11 or the attachment portion 63 are prevented from interfering with each other.

  In addition, when the ventilation fan 1 is attached to the small-diameter ventilation pipe 71, as shown in FIG. 6 (b), although the large-diameter insertion portion 21 protrudes to the front side of the wall, the amount of protrusion can be reduced. Thus, it is possible to suppress a decrease in appearance on the indoor side.

  That is, conventionally, as shown in FIG. 10, the large-diameter elastic piece 83 of the large-diameter insertion portion 82 of the ventilation fan 81 extends in the axial direction from one end side to the other end side. The amount of protrusion of the large-diameter insertion portion 82 on the wall surface increases in proportion to increasing the length of the large-diameter elastic piece 83 in order to increase the tension force to 72, and the appearance on the indoor side decreases. It was.

  However, as shown in FIG. 6 (b), the large-diameter side elastic piece 23 of the present embodiment has the same axial length, that is, the width, regardless of the length of the large-diameter side elastic piece 23. Since the length of the large-diameter elastic piece 83 extending in the axial direction is considerably smaller than the length of the large-diameter insertion portion 21 protruding from the opening end 73 of the ventilation pipe 71 to the front side of the wall, the deterioration in appearance can be suppressed. Can do.

  By the way, although the small diameter side elastic piece 13 of the ventilation fan 1 of the said embodiment and the elastic piece 65 of the ventilation hood 61 are extended in the axial direction of the ventilation pipe 71 from one end side to the other end side, this invention is implemented. In this case, as with the large-diameter elastic piece 23, these may be extended in the circumferential direction of the ventilation pipe 71 from one end side to the other end side. The length of the attachment portion 63 of 61 can be shortened, and the end portions of the ventilation fan 1 and the ventilation hood 61 can be prevented from interfering with each other even when the thickness of the wall 74 is smaller.

  Moreover, although the ventilation fan 1 of the said embodiment is formed in two steps, the large diameter insertion part 21 and the small diameter insertion part 11, the insertion part reaches the full length of an axial direction, is the same diameter, and is the regulation step part 31. It may be one that does not have, or conversely, it may be formed with a large, medium, small diameter insertion part and three or more stages, and in these cases, the elastic piece provided in the insertion part is By extending in the circumferential direction of the ventilation pipe 71 from one end side to the other end side, the axial length of the insertion portion can be shortened and accommodated in the ventilation pipe 71 even when the thickness of the wall 74 is small. If the ventilation hood 61 is also attached, interference with the ventilation hood 61 can be prevented.

  The large-diameter elastic piece 23 is inserted into the ventilation pipe 71 so that the insertion-side back end 27 of the extended portion can be smoothly inserted into the ventilation pipe 71 without being held by the opening end 73 of the ventilation pipe 71. 27 is linearly inclined toward the front side in the insertion direction from one end side to the other end side. However, when the present invention is carried out, the shape is not limited to this, and the rear end portion 27 in the insertion direction is linear. For example, as shown in FIGS. 11 (a) and 11 (b), the rear end 27 in the insertion direction has a full length. It can also be formed in the inclined portion 23a that is slightly bent or curved toward the inner space 24 side. In this case, the width of the large-diameter side elastic piece 23 may be constant up to the entire length of the extended portion, or may be gradually narrowed toward the other end side as in the above embodiment.

  Further, the large-diameter side elastic piece 23 is formed in a curved surface at a portion extending in the circumferential direction from one end side to the other end side. Similarly to the elastic piece 13, it may be bent in a square shape at a substantially intermediate position in the length direction.

  In addition, the large-diameter side elastic piece 23 and the small-diameter side elastic piece 13 are provided at four positions at equal intervals in the circumferential direction, but are not limited thereto, and may be provided at three places or five places or more.

  Furthermore, although the ventilation fan 1 of the said embodiment has shown what is applied and attached to the cylindrical ventilation pipe 71, it is applicable similarly to ventilation pipes 71, such as a square cylinder shape.

DESCRIPTION OF SYMBOLS 1 Ventilation fan (ventilation apparatus) 23 Large diameter side elastic piece 2 Ventilation fan main body 31 Restriction step part 11 Small diameter insertion part 71 Ventilation pipe 12, 22 Outer surface 72 Inner surface 13 Small diameter side elastic piece 73 Open end 21 Large diameter insertion part 75 Wall hole

Claims (2)

A ventilation device attached to the ventilation pipe with an insertion portion inserted into the end of the ventilation pipe facing the wall hole,
One end side of the insertion portion is joined to the outer surface of the insertion portion, the other end side projects outward from the internal space of the ventilation pipe, and is bent to the inside of the ventilation pipe at the time of attachment. An elastic piece is provided in pressure contact with the inner surface of the pipe,
In the elastic piece, a direction extending from the one end side to the other end side is formed in a circumferential direction of the insertion portion, and an insertion direction rear end portion in the width direction extends from the one end side to the other end side. A ventilator characterized by being inclined toward the front side in the insertion direction. A ventilation device attached to the ventilation pipe with an insertion portion inserted into the end of the ventilation pipe facing the wall hole,
The insertion portion is provided with a small-diameter insertion portion corresponding to the small-diameter ventilation pipe on the back side in the insertion direction so as to be inserted corresponding to the two types of large and small ventilation pipes having different diameters. A large-diameter insertion portion corresponding to the ventilation pipe is provided,
A restriction that, when inserted into the small-diameter ventilation pipe between the small-diameter insertion section and the large-diameter insertion section that are adjacent in the insertion direction, the insertion is regulated by contacting the open end of the small-diameter ventilation pipe. A step is provided,
One end side of each insertion portion is joined to the outer surface of the insertion portion, and the other end side protrudes outward from the inner space of the ventilation pipe, bends inward of the ventilation pipe at the time of attachment, and the elastic return force An elastic piece that presses the inner surface of the ventilation pipe is provided,
Further, the elastic piece provided at least in the large-diameter insertion portion has a direction extending from the one end side to the other end side in the circumferential direction of the large-diameter insertion portion, and an insertion direction in the width direction. A ventilator characterized in that a rear side end portion is inclined toward the front side in the insertion direction from the one end side to the other end side.

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