JP2001280658A - Pipe fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe fan which can be installed easily and, at the same time, can be repaired and renewed easily even when a building has a different wall thickness. SOLUTION: This pipe fan is provided with a connecting duct which has a flange section having an outside diameter larger than that of the opening of a wall at one end of a cylindrical section which is formed to have an outside diameter smaller than the inside diameter of a wall hole, to be able to be expanded and contracted in the axial direction, and to be inserted into the wall hole, a fixing frame which has a flange section having an outside diameter larger than the opening of the wall at one end of a cylindrical section which is formed to have an outside diameter smaller than the inside diameter of the wall hole and to be engaged with the cylindrical section of the duct, and a pipe fan main body which has a flange section having an outside diameter larger than the opening of the wall at one end of a cylindrical section which is formed to have an outside diameter smaller than the inside diameter of the connecting duct and inserted into the cylindrical section of the connecting duct in a state where a blower is incorporated in the cylindrical section by arranging the flange section outside the flange section of the duct. This fan is also provided with a binding member which binds the flange sections of the connecting duct and fixing frame to each other in the direction in which the flange sections are press-contacted with the wall and an external wall member which ventilatably covers the opening of the fixing frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe fan provided with a blower therein and mounted in a pre-drilled wall hole.

[0002]

2. Description of the Related Art A pipe fan of this type mainly covers a pipe inserted into a wall hole, a pipe fan main body mounted in the pipe, and covers the pipe fan main body so as to allow ventilation from the inside of the wall. It is composed of a decorative grille and an outer wall member that covers the opening of the outer wall surface where the pipe is inserted.

Referring to FIG. 27, the construction of a conventional pipe fan and a construction method for mounting it on a wall will be described. In this case, as shown in (a), for example, using a circle cutter C, a hole 1 whose axis is aligned with the inner and outer wall materials 1 and 2 is used.
Open a and 2a. Next, as shown in (b), for example, a pipe 3 made of vinyl chloride is cut in accordance with the wall thickness, inserted into the holes 1a and 2a, and the boundary between the wall materials 1 and 2 and the pipe 3 is made of silicon. Sealing with an adhesive such as
As shown in (c), the pipe fan main body 4 having the decorative grill 5 is attached to the inside of the pipe 3, and the outer wall member 6 is further mounted.
I was wearing.

[0004] In this case, taking into consideration that the thickness of the wall differs depending on the building, for example, as shown in (d), a pipe kit 7 for sliding pipes 7a and 7b of different diameters in the axial direction is prepared. After adjusting the length to match the thickness,
The overlapping parts are fixed with, for example, tape, and the pipe 7
The method of fixing the flange portion a to the wall surface with a wood screw 8 has also been partially adopted.

[0005]

In the above-mentioned conventional pipe fan, a pipe to be inserted into the wall is arranged separately from the blower, the thickness of the wall is measured, and the wall is cut and, if necessary, adjusted. In addition, a great deal of time and effort was required to secure the pipe to the wall.

The present invention has been made in view of the above circumstances, and provides a pipe fan that can facilitate construction and repair and replacement even when the building has different wall thicknesses. With the goal.

[0007]

The invention according to claim 1 is
One end of a cylindrical portion having a blower provided therein and mounted in a pre-drilled wall hole, the outer diameter of which is smaller than the inner diameter of the wall hole, and which is formed so as to be able to expand and contract in the axial direction. A connecting duct having a flange portion having an outer diameter larger than the opening of the wall surface, the flange portion being in contact with one wall surface, and the cylindrical portion being inserted into the wall hole; At one end of the tubular portion formed smaller than the inner diameter and capable of fitting with the tubular portion of the connection duct, a flange portion having an outer diameter larger than the opening portion of the wall surface is provided, and the flange portion is connected to the other end. A fixed frame that is brought into contact with the wall surface of the connecting duct, and the other end of the tubular portion is fitted to the other end of the tubular portion of the connection duct, and is engaged and connected by a locking piece formed at the fitting portion. At one end of a cylindrical portion having an outer diameter smaller than the inner diameter of the connecting duct, a flange having an outer diameter larger than the opening of the wall surface is provided. A blower is mounted inside the tubular portion, and the flange portion is disposed outside the flange portion of the connection duct, and the tubular portion to which the blower is mounted is inserted into the tubular portion of the connection duct. A pipe fan body, a binding member that binds each other in a direction of pressing against the wall surface by connecting and tightening the flange portion of the connection duct and the flange portion of the fixed frame, and a pipe hood attached to the opening of the fixed frame. Or an outer wall member such as a bend cap,
It is characterized by having.

According to a second aspect of the present invention, in the pipe fan according to the first aspect, the tubular portion of the connecting duct is made of bellows.

According to a third aspect of the present invention, in the pipe fan according to the first or second aspect, the tying member is formed in an elongated thin plate shape from a base portion bent in a hook shape to a tip thereof, and is provided in a predetermined range on at least one surface. A band portion having a saw-toothed uneven surface capable of sliding from the tip to the base and preventing sliding from the base to the tip, and an opening capable of inserting the band portion, and A locking ring portion having an engaging claw that engages with the saw-toothed uneven surface with a predetermined pressure and performs sliding and sliding prevention corresponding to the shape of the sawtoothed uneven surface, and a flange portion of the connection duct. An opening is formed in the flange portion of the fixed frame so that the band portion is inserted at the same position in the circumferential direction facing each other, and one of the flange portion of the connection duct and the flange portion of the fixed frame is disposed outside one of the openings. Opening of The band part is inserted to the outside of the band part, the locking ring part is engaged with the tip of the band part, and the hook-shaped base of the band part and the locking ring part form the flange part of the connection duct and the flange part of the fixed frame. It is characterized by tightening and fixing.

According to a fourth aspect of the present invention, in the pipe fan according to the third aspect, one of the flange portions is a flange portion of a connecting duct and the other is a flange portion of a fixed frame. It is characterized by the following.

According to a fifth aspect of the present invention, in the pipe fan according to the fourth aspect, the hook-shaped base portion of the band portion has a predetermined thickness, and the flange portion of the connecting duct projects in the axial direction and has a tip. The portion has a protrusion that can be elastically deformed in the radial direction, and an opening formed in one of the base and the protrusion and a claw formed on the other are engaged with each other. I do.

According to a sixth aspect of the present invention, in the pipe fan according to any one of the third to fifth aspects, the other end of the fixed frame is inserted inside the other end of the cylindrical portion of the connecting duct. The other end is engaged with each other, and a holding portion having an opening for holding the position by inserting the tip of the band portion through the outer peripheral surface of the other end of the connection duct is provided.

According to a seventh aspect of the present invention, in the pipe fan according to any one of the first to sixth aspects, the flange portion of the connecting duct is provided at least at two places in the circumferential direction of the flange portion of the pipe fan main body. Has an engaging portion which is fitted to the outer peripheral edge of the connecting duct, the tip of which protrudes radially elastically deformable, and the claw portion which faces radially inward from the distal end engages with the flange portion of the connection duct by elastic deformation. The pipe fan main body can be attached to and detached from the connecting duct in accordance with the removal of the engaging portion.

According to an eighth aspect of the present invention, there is provided the pipe fan according to the seventh aspect, further comprising a decorative grill which covers the flange portion of the pipe fan main body including the engaging portion.

According to a ninth aspect of the present invention, in the pipe fan according to the seventh or eighth aspect, the claw portion of the engaging portion and the inner end face of the flange portion of the connecting duct engaged with the claw portion have teeth. It is characterized in that a radial uneven portion is formed so as to match, and a circumferential length of the uneven portion formed on the inner end face of the flange portion of the connection duct is longer than a circumferential length of the claw portion.

The invention according to claim 10 is the invention according to claims 1 to 9
In the pipe fan according to any one of the above, a claw portion utilizing elasticity is provided on one of the flange portion and the outer wall member of the fixed frame, and an engagement groove for engaging the claw portion is provided on one of the other, The outer wall member can be attached to and detached from the fixed frame in accordance with the hook of the claw portion with respect to the engagement groove.

According to an eleventh aspect of the present invention, in the pipe fan according to the tenth aspect, the circumferential length of the engaging groove is formed to be longer than the circumferential length of the claw portion, and the outer wall member can be rotated in the circumferential direction. It is characterized by the following.

The invention according to claim 12 is the invention as set forth in claims 1 to 1
In the pipe fan according to any one of the first to third aspects, the outer wall member has a tubular portion that covers the flange portion of the fixed frame, and an annular portion that is formed integrally with the tubular portion. The inner axial dimension is longer than the axial dimension of the flange portion of the fixed frame.

The invention according to claim 13 is the invention according to claims 1 to 1
3. The pipe fan according to any one of 2), further comprising a plate-shaped spring which is curved radially outward in an arc shape and one end of which is fixed to an outer peripheral surface of the tubular portion of the pipe fan main body. The pipe fan body can be attached to and detached from the connection duct by the elasticity of the pipe fan.

The invention according to claim 14 is the invention according to claims 1 to 1
3. In the pipe fan according to any one of the items 3, the connecting duct has a distance of 95 mm between the flange of the connecting duct and the flange of the fixing frame when the other ends of the connecting duct and the fixing frame are fitted to each other. It is characterized by having a tubular portion that expands and contracts within a range of from 220 mm to 220 mm.

[0021] The invention according to claim 15 is the invention according to claims 1 to 1
3. In the pipe fan according to any one of the above items 2, a plurality of pressure contact pieces having elasticity whose free ends extend inward in the axial direction and are bent inward in the radial direction are formed on the inner peripheral surface of the flange portion of the connection duct. It is provided at a plurality of positions in the direction, and the tubular portion of the pipe fan main body is held by the pressure contact piece.

According to a sixteenth aspect of the present invention, in the pipe fan according to the fifteenth aspect, projections are provided in which a plurality of radially penetrating slits are formed at a plurality of circumferential positions on the outer end surface of the flange portion of the connecting duct. Part is formed, an elastic protrusion formed by partially cutting and raising the base end of the pressure contact piece is formed, and a portion where the elastic protrusion is formed is inserted into a slit of the protrusion,
The base end of the pressure contact piece is fixed such that the elastic projection prevents the protrusion.

The invention according to claim 17 is the invention according to claim 3 or 4.
The pipe fan according to any one of claims 1 to 3, further comprising an engagement release mechanism configured to release an engagement state of the engagement claw of the engagement ring portion engaged with the serrated uneven surface of the band portion by an external operation. I do.

According to an eighteenth aspect of the present invention, in the pipe fan of the thirteenth aspect, there is provided a tightening mechanism for removably fastening one end of a plate-shaped spring to the pipe fan body.

According to a nineteenth aspect of the present invention, in the pipe fan of the tenth aspect, there is provided an engagement releasing means for releasing the engagement state of the claw portion with the engagement groove by an external operation.

According to a twentieth aspect of the present invention, in the pipe fan according to the tenth aspect, the engaging groove is formed as a concave and convex groove that is continuous in a circumferential direction in a sawtooth shape, and the claw portion is formed to be slidable in the concave and convex groove. The mounting angle of the outer wall member is made variable by rotating the outer wall member in the circumferential direction.

According to a twenty-first aspect of the present invention, in a pipe fan having a blower therein and mounted in a pre-drilled wall hole, an outer diameter is formed smaller than an inner diameter of the wall hole, and an opening in the wall is formed. A first duct having a flange portion having an outer diameter larger than that of the first portion, the cylindrical portion being inserted into the wall hole by bringing the flange portion into contact with one wall surface, and an outer diameter smaller than the inner diameter of the wall hole. At one end of the cylindrical portion formed and slidable in the axial direction by fitting with the cylindrical portion of the first duct, a flange portion having an outer diameter larger than the opening of the wall surface is provided at one end of the cylindrical portion. A second duct in which the cylindrical portion is inserted into the wall hole by bringing the flange portion into contact with the other wall surface, and a wall portion on one end of the cylindrical portion having an outer diameter smaller than the inner diameter of the connection duct. A flange portion having an outer diameter larger than the opening of the blower, a blower is attached inside the cylindrical portion, A pipe fan body in which a tubular portion having a flange portion disposed outside a flange portion of a duct and to which a blower is attached is inserted into the tubular portion of the first duct; a flange portion of the first duct; A bundling member that binds each other in a direction of pressing against the wall surface by connecting and tightening the flange portions of the duct, and an outer wall member such as a pipe hood or a bend cap attached to the opening of the fixed frame. Features a pipe fan.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on preferred embodiments shown in the drawings. FIG. 1 is a longitudinal sectional view showing a configuration of a first embodiment of a pipe fan according to the present invention, and FIG. 2 is an exploded perspective view thereof. In each of these figures, holes whose axes match each other are formed in the inner and outer wall materials 1 and 2, and a pipe fan main body is mounted in these holes.
Here, the electric motor 10a of the blower 10 is mounted on the outside end of the cylindrical portion 9 with its output shaft facing inward, and the blade 10b is fixed to this output shaft. A flange portion 9a having a larger outer diameter than the opening of the wall hole 1a is integrally formed at the indoor end of the cylindrical portion 9 opposite to the electric motor 10a, and these form a pipe fan main body 4. .

Outside the tubular portion 9 of the pipe fan body 4,
A connection duct 11 is mounted. This connecting duct 11
Is constituted by a bellows portion 12, which is axially extendable and contractible in the axial direction. The inner diameter of the bellows portion in the shortest state within a predetermined range is the cylindrical portion 9 of the pipe fan body 4.
, And the outer diameter is smaller than the inner diameter of the wall hole 1a. A flange portion 12a having an outer diameter larger than the opening of the wall hole 1a is connected to an end of the connection duct 11 on the indoor side.
Square holes 13 are provided at positions obtained by equally dividing 2a in the circumferential direction. The square hole 13 is provided at a position facing the opening of the wall hole 1a. An annular member 12b is connected to the outdoor end of the connection duct 11, and the annular member 12b
A hole 14 is formed at a position where the circumferential direction is bisected in b.

On the other hand, a cylindrical portion 16 is inserted into the opening of the wall hole 2a and inserted into the annular member 12b of the connecting duct 11, and a wall hole 2a is formed outside the cylindrical portion 16 on the outdoor side.
The fixing frame 15 is provided with a flange 16a having an outer diameter larger than that of the opening. Claws 17 are formed on the outer circumferential surface of the tip of the cylindrical portion 16 of the fixed frame 15 at equal intervals in the circumferential direction. The claw portions 17 serve as locking pieces. The connection duct 11 and the fixed frame 15 are connected with each other by engaging with the holes 14 formed. A lock mechanism 18 is provided at a position where the flange 16a is equally divided in the circumferential direction. The lock mechanism 18 is provided at a position facing the opening of the wall hole and at a position corresponding to the square hole 13 formed in the flange portion 12a of the connection duct 11 described above.

A banding member 19 such as Insulok (trade name of Tyton Co., Ltd.) as a band portion is passed between the square hole 13 and the lock mechanism portion 18. The binding band member 19 is formed in an elongated thin plate shape from a base bent in a hook shape to a tip, and is slidable from the tip to the base in at least a predetermined range on one surface, and is slid from the base to the tip. Has a saw-toothed uneven surface 19a for preventing the sliding of the surface. The lock mechanism 18 formed in the fixed frame 15 has an opening through which the binding band member 19 can be inserted, and engages with the saw-toothed uneven surface 19a with a predetermined pressure, and has a shape corresponding to the shape of the uneven surface. It has an engaging claw 18a that performs corresponding sliding and sliding prevention. Further, an outer wall member 6 is mounted outside the fixed frame 15.

Next, a method of attaching the pipe fan will be described. First, holes 1a and 2a are drilled in the wall materials 1 and 2, and a connection duct 11 in which a binding band member 19 is passed through a square hole 13 formed in the flange portion 12a is inserted from the indoor side, while a fixing frame from the outdoor side. 15 is inserted into the wall hole 2a, the tip of the binding band member 19 is passed through the lock mechanism 18, and the claw 17 provided at the tip is inserted into the hole formed in the annular member 12b of the connection duct 11. 14 is engaged. Next, the distal end of the binding band member 19 is pulled, and the connecting duct 11 is fixed by sandwiching the wall materials 1 and 2 from both sides by the flange 12a of the connecting duct 11 and the flange 16a of the fixing frame 15. Then, fixed frame 1
The outer wall member 6 is mounted on the outer side of 5, and the pipe fan body 4 is mounted from the indoor side.

Thus, according to the configuration shown in FIGS. 1 and 2, it is not necessary to cut the pipe according to the wall thickness, and it is not necessary to perform a process such as caulking for fixing the pipe.

FIG. 3 is a partial sectional view showing the configuration of a second embodiment of the pipe fan according to the present invention, and particularly shows an assembling mechanism of the binding band member 19 to the flange portion 12a. In the figure, the same elements as those in FIG. 1 or FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. Here, the base portion 19b of the binding band member 19 is formed thick so as to be bent in a hook shape and has a function of a stopper, and the base portion 19b is provided with a through hole 20 penetrating in the radial direction. Also,
The outer peripheral end of the flange portion 12a protrudes outward in the axial direction, and a claw portion 21 is provided on the inner peripheral surface of the protruding portion adjacent to the square hole 13.

With such a configuration, the flange portion 12a
The binding band member 19 is passed through the square hole 13 of FIG.
When the connecting duct 11 is inserted into the wall hole 1a, the binding band member 19 can be handled as an integrated body. That is, it is possible to prevent the binding band member 19 from falling off from the connection duct 11.

FIG. 4 is a partial perspective view showing the configuration of a third embodiment of the pipe fan according to the present invention. In the drawing, the same elements as those in FIG. 1 or FIG. Description is omitted. The annular member 12b formed in the connecting duct 11 has a hole 14 for engaging with the fixing frame 15, and a guide 22 is provided at a position different from the hole 14 in a circumferential direction. Have been. The guide 22 is provided at a position on the outer peripheral surface of the annular member 12b corresponding to the square hole 13 formed in the flange 12a at the opposite end, and allows the binding band member 19 to pass therethrough and hold it. It has become.

With this configuration, when the connecting duct 11 is inserted into the wall hole 1a, the connecting duct 11 can be prevented from being caught inside the wall.

FIGS. 5A to 5D are a partial sectional view and a partial perspective view showing the configuration of a fourth embodiment of a pipe fan according to the present invention. In the drawings, the same elements as those in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, a claw portion 23 is formed at a position where the circumferential direction of the flange portion 9a of the pipe fan main body 4 is bisected in the axial direction with a predetermined width, and a radially inward claw portion 23 is formed at the tip thereof. Further, a handle 24 protruding outward in the radial direction is formed at a substantially middle position of the portion turned back in the axial direction. On the other hand, the flange portion 12a of the connection duct 11 projects outward in the axial direction,
In addition, it is cut out leaving its end face portion, and the engaging portion 25 is formed here. FIG. 5B shows the claw portion 2.
3 shows the configuration of the handle 3 and the handle 24.

With this configuration, when the pipe fan main body 4 is mounted on the connecting duct 11, as shown in FIG. , And is displaced radially outward, and when further pressed, it is mounted as shown in FIG. On the other hand, from the connection duct 11 to the pipe fan body 4
When removing the handle 2, as shown in FIG.
4 may be pulled to the near side, and the claw portion 23 may be removed from the engagement portion 25. As a result, the pipe fan body 4 is attached to the connection duct 11 by a single operation without using a tool,
Can be removed.

FIGS. 6A to 6D are a partial sectional view and a plan view showing the configuration of a fifth embodiment of the pipe fan according to the present invention. This is a modification of the engaging portion 25 and the claw portion 23 shown in FIG. 5, and the contact surface of the engaging portion 25 with the claw portion 23 has a certain width in the circumferential direction. The unevenness 26 is formed. Further, the engaging portion 2 of the claw portion 23
The contact surface for 5 is provided with a projection 27 that engages with the irregularities 26. In this case, the circumferential dimension b of the portion where the unevenness 26 is formed is significantly larger than the circumferential dimension a of the claw portion 23.

With this configuration, for example, as shown in FIG. 6D, when the pipe fan body 4 is attached to the connecting duct 11 at an angle, the pipe fan body 4 is tilted by twisting. Can be easily modified.

FIGS. 7 (a) and 7 (b) are a cross-sectional view showing a configuration of a pipe fan according to a sixth embodiment of the present invention and a perspective view showing an assembled state. This embodiment shows a specific configuration in which the outer wall member 6 is mounted on the fixed frame 15. A claw portion which projects inward in the axial direction inside the flange portion 6 a of the outer wall member 6 and has a circumferential dimension of a ′. 28 are formed. On the other hand, the fixed frame 15 is formed with the claw 17 for coupling to the connection duct 11 as described above, and the circumferential dimension for engaging with the claw 28 at a position separated from the claw 17 is b '. Are formed. Here, the claw part 2
The circumferential dimension b 'of the slit 29 is significantly larger than the circumferential dimension a' of FIG.

With this configuration, the outer wall member 6 can be mounted by a simple pushing operation without using screws or the like.
Further, the mounting angle of the outer wall member 6 can be adjusted by making the circumferential dimension of the slit 29 larger than the circumferential dimension of the claw portion 28.

FIG. 8 is a partial sectional view showing the configuration of a seventh embodiment of the pipe fan according to the present invention. In this embodiment, the outer wall member 6 having different dimensions can be attached to the fixed frame 15. The axial length of the cylindrical portion 16 of the fixed frame 15 is D, the thickness of the flange portion 16 a is E, The tubular portion 1 of the fixed frame 15 is extended from the distal end of the tubular covering portion 30 formed by bending inward from the radial end of the flange portion 6a of the outer wall member 6.
When the length to the tip of the cylindrical portion 6b inserted into the inside of the tube 6 is D 'and the axial length of the inner peripheral surface of the cylindrical covering portion 30 is E', a shape satisfying the relationship of the following equation is obtained. I do.

C <C ′ (1) D <D ′ (2) According to this embodiment, there is an effect that the commercially available outer wall member 6 having different dimensions can be mounted according to customer needs. can get.

FIG. 9 is a perspective view showing a configuration of an eighth embodiment of a pipe fan according to the present invention, and a sectional view of a main part.
Among these, (a) is a perspective view of a portion inserted into the wall of the pipe fan main body 4, (b) is a perspective view of a spring attached to the pipe fan main body 4, and (c) is a perspective view of the spring. FIG. 4 is a partial cross-sectional view of the attached pipe fan main body 4. Here, the spring 34 is formed by cutting and raising a central portion of the belt-shaped elastic member and bending it in an arc shape. Each end 34a and 34b is bent in the opposite direction to each other, and a hole 37 is formed in one bent end 34b. Are formed. The pipe fan body 4 has a cylindrical portion 9 having a flange portion 9a formed therein.
An engagement portion 35 for hooking the bent end 34a of the spring 34 is provided on the inner surface of the portion a. Further, a claw portion 38 is formed on an end surface of the electric motor fixing leg 36 formed integrally with the cylindrical portion 9 to engage with the hole 37 of one bent end portion 34b of the spring 34. So spring 3
When the bent end 34a is hooked on the engaging portion 35 by engaging the hole 37 of the bent end portion 34b with the claw portion 38, a bow-shaped spring 34 is attached to the outer periphery of the tubular portion of the pipe fan main body 4. Are held in a state of bending in the radial direction.

With the above configuration, the pipe fan body 4 can be mounted inside the connection duct 11 by utilizing the elasticity of the spring 34. In this case, since the mounting structure of the pipe fan main body 4 shown in FIG. 5 is not necessary, an old product can be replaced or a pipe fan having a configuration using a commercially available pipe can be easily attached and detached.

FIGS. 10 (a) and 10 (b) connect the connecting duct 11 and the fixed frame 15 according to the above embodiments, and are sandwiched between the flange 12a of the connecting duct 11 and the flange 16a of the fixed frame 15. It shows the range of expansion and contraction dimensions corresponding to the thickness of the wall, and is generally from 95 mm as shown in FIG. 10A to 220 mm as shown in FIG.
Most buildings can be dealt with by making the range adjustable.

FIGS. 11 (a) and 11 (b) are a perspective view and a partial sectional view showing the configuration of a ninth embodiment of a pipe fan according to the present invention, and FIGS. 12 (a) and 12 (b) show details thereof. It is a perspective view and an attached state figure which show this. In this embodiment, a spring is attached to the insertion opening of the pipe fan main body 4 of the connection duct 11 instead of attaching a spring that curves in a bow shape to the pipe fan main body 4, and the pipe fan main body 4 is held. Here, projections 42 are formed at positions where the end surface of the flange portion 12a of the connection duct 11 on the mounting side of the pipe fan body 4 is equally divided into three in the circumferential direction. A slit 43 penetrating in the radial direction is formed at the base of the protrusion 42 along the flange surface. The spring 40 as a pressure-contacting piece is formed by bending an elastic strip in a shape of "", and an elastic projection 41 formed by cutting and raising a part of one bent portion is formed. The elastic projection 41 has its end directed inward and raised on the side opposite to the other bent part.

Here, one bent portion of the spring 40 in which the elastic protrusion 41 is formed is inserted into the slit 43 of the protrusion 42 from the inside in the radial direction to the outside. At this time, the elastic projection 41 is bent by the slit 43 so as to form substantially the same plane as the band plate, and returns to a state where the elastic projection 41 has been cut and raised with the elastic projection 41 passing through the slit 43. As a result, the spring 40 is held by the projection 42, and the other bent portion is fixed in a state of being bent radially inward at the insertion opening of the pipe fan main body 4 as shown in the figure. Since such springs 40 are provided at three equally divided positions in the circumferential direction of the flange portion 12a, the pipe fan main body 4 can be held by these three springs 40.

By the way, as shown in FIG. 12A, the spring 40 is moved from the arrow X direction to the slit 4 of the projection 42.
3, the inner peripheral portion of the flange portion 12a is notched flat, and the dimension from the notched surface to the outside of the protrusion 42 is B, from the inside of the bent portion of the spring 40 to the tip of the elastic protrusion 41. Is C, the width of the slit 43 is G, and the cut-and-raised height of the elastic projection 41 is H,
The following relationship must be satisfied.

B ≦ C (3) G <H (4) As shown in FIG. 12B, the outside diameter of the tubular portion 9 of the pipe fan body 4 is D, and the inside of the connection duct 11 is D. Assuming that the inner diameter of the bent portion of the spring 40 to be inserted is E and the inner diameter of the tip is F, the following relationship must be satisfied.

F <D <E (5) Thus, according to the ninth embodiment, it is possible to easily attach and detach a pipe fan having a configuration in which an old product is replaced or a commercially available pipe is used.

FIG. 13 shows a first embodiment of the pipe fan according to the present invention.
FIG. 3 is a partial cross-sectional view illustrating a configuration of a zeroth embodiment, in which the same elements as those in FIG. 1 or FIG. 2 are denoted by the same reference numerals, and description thereof is omitted. This embodiment shows an unlocking element of the lock mechanism 18 with respect to the binding band member 19, and the lock mechanism 18 is joined to the flange 16a in the circumferential direction, and is pushed against the rear of the lock mechanism 18 having elasticity. A button 45 is provided, and when the push button 45 is pushed in the direction of arrow Y, the engagement of the claw portion of the lock mechanism 18 with the binding band member 19 is released.

With this configuration, the binding band member 19 can be easily removed.

FIG. 14 shows a first embodiment of the pipe fan according to the present invention.
FIG. 3 is a partial cross-sectional view showing the configuration of the first embodiment, in which the same elements as those in FIG. 1 or FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, there is provided a lock release knob 46 for directly lifting the claw portion of the lock mechanism portion 18 from the engagement portion of the binding band member 19 in the direction of arrow Z, that is, radially outward.

With this configuration, the binding band member 19 can be easily removed.

FIGS. 15 (a) and 15 (b) are a perspective view and a vertical sectional view showing the structure of a twelfth embodiment of the pipe fan according to the present invention. In this embodiment, a nut holding portion 51 for holding the binding band member 19a on the outer peripheral portion of the fixed frame 15 is used.
And a nut 52 having a knob 53 is rotatably mounted inside the nut holding portion 51. In this case, the tip of the binding band member 19a is a male screw, and the nut 52 is screwed to this male screw. The nut holding portion 51 has a bag shape, and the nut 52 does not fall out of its opening. By rotating the knob 53, the distal end portion of the binding band member 19a can be pushed out.

FIG. 16 shows a modification of the binding band member constituting the pipe fan according to the present invention, in which a pair of cuts 55 are formed at predetermined intervals in the longitudinal direction on both sides of a thin and elongated portion. This allows cutting at an arbitrary position without using a specific tool.

FIGS. 17 (a) and 17 (b) show a twelfth embodiment of the pipe fan according to the present invention. In particular, FIG. 17 (a) and FIG. It is a side view showing an example of a screw. In FIG. 9, a spring that is curved in a bow shape is attached.
The same elements as those described above are denoted by the same reference numerals and description thereof will be omitted. Here, the spring 55 is entirely bent in a bow shape and attached to the outside of the motor fixing leg 36. One end 55a of this spring 55 is bent at a right angle, and the motor 10 of the motor fixing leg 36 is fixed by a fixing screw 56.
The other end of the spring 55 is a free end facing the direction of the flange portion 9a (see FIG. 9) of the pipe fan main body 4. The fixing screw 56 has a circular knob on its head, but instead of this, as shown in (b), a thumb screw 57, a knob screw 58,
Even if another fixing screw such as a push screw 59 is used, the spring 55 can be attached and detached without using a tool, and similarly to the embodiment shown in FIG. 9, replacement of an old product or use of a commercially available pipe is used. The pipe fan can be easily replaced.

FIGS. 18 (a) and 18 (b) are a perspective view and an enlarged sectional view of a main part showing a modification of the bow spring with respect to the pipe fan main body 4. FIG. Here, a fixing bracket 60 is fixed to an end surface of the electric motor fixing leg 36 of the pipe fan main body 4 by a fixing screw 61. The fixing metal fitting 60 has a radially outer end portion cut out, and both side portions are bent at right angles to the insertion direction of the pipe fan main body 4 to form a cut and bent portion 62, and a central portion is a flange portion 9a (FIG. 9). reference)
The bent portion 63 is formed by being bent at a right angle in the direction of. One end of the spring 65 is bent into a crank shape, a holding hole 66 is formed at the end, and a cut-and-raised portion 67 is formed in the middle thereof. The holding hole 66 of the spring 65 allows the cut-and-bent portion 63 to pass therethrough. In this state, a stop ring 69 is provided to wind the inside of the cut-and-bend portion 62 and the inside of the cut-and-raised portion 67. The retaining ring 69 is formed by bending a wire into a square shape. The retaining ring 69 is hooked on the bent portion 62 and the raised portion 67 with the spring 65 standing upright in the drawing, and then the spring 65 is folded down as shown. This enables a device using a toggle mechanism. Thus, the spring 65 can be attached and detached without using a tool.

FIGS. 19A and 19B show a modified example of the spring 65 shown in FIG. 18, in which the cut and bent portion is bent into a "U" shape instead of the cut and bent portion which is simply cut and raised. The cut-and-bent portion 63a is used to prevent the spring 65 from separating from the retaining ring 69, thereby improving the holding performance.

FIGS. 20 (a) and 20 (b) are a perspective view and a partial sectional view showing a main part of a thirteenth embodiment of a pipe fan according to the present invention. In the figure, the same elements as those shown in FIG. 7 are denoted by the same reference numerals, and description thereof will be omitted. As described above, the claw portion 28 formed inside the outer wall member 6 is inserted inside the fixed frame 15 and engages with the pair of slits 29. Of these, one end of the claw 28 in the circumferential direction is
As shown in (b), the configuration differs from the sixth embodiment shown in FIG. 7 in that an inclined surface 28a is formed from the inside toward the side. With such a configuration, there is an advantage that the mounted outer wall member 6 can be removed only by rotating it by a slight angle.

FIGS. 21 (a) and 21 (b) are a side view and a partial sectional view showing a main part of a fourteenth embodiment of a pipe fan according to the present invention. In the figure, the same elements as those shown in FIG. 20 are denoted by the same reference numerals, and description thereof will be omitted. This is different from the sixth embodiment shown in FIG. 7 in that an inclined slit 29 a inclined at an angle α in the axial direction is continuously formed on the side of the slit 29 formed in the fixed frame 15. I have. With this configuration, once the mounted outer wall member 6 is rotated to the inclined slit 29a side, the tip of the claw portion 28 contacts the corner portion of the inclined slit 29a and is bent radially inward. Thus, there is an advantage that the outer wall member 6 can be easily removed.

FIGS. 22 (a) and 22 (b) are a perspective view and a partial perspective view showing a main part of a fifteenth embodiment of the pipe fan according to the present invention. In the figure, the same elements as those shown in FIG. 20 are denoted by the same reference numerals, and description thereof will be omitted. This is one in which the uneven portion 39 is formed in a predetermined range on the inner surface of the fixed frame 15 and the inner surface of the claw portion 28 is formed so as to fit into the uneven portion 39, and the elasticity of the claw portion 28 is utilized. The mounting position of the outer wall member 6 can be rotated within a range in which the uneven portion 39 is formed. FIG. 22 (b) shows that the concave groove 39a at the end in the circumferential direction is formed continuously to the axial end when the claw 28 is fitted into the concave / convex portion 39, thereby facilitating the insertion and removal of the claw 28. As a result, attachment / detachment of the outer wall member 6 is facilitated.

FIG. 23 shows a first embodiment of the pipe fan according to the present invention.
It is the perspective view which showed the principal part of 6th Embodiment. In the figure, FIG.
The same elements as those shown in FIG. 0 are denoted by the same reference numerals, and description thereof is omitted. This is one in which an axial groove 29b is continuously formed at one circumferential end of a slit 29 formed in the fixed frame 15, thereby facilitating insertion / removal of the claw portion 28 and attaching / detaching the outer wall member 6. Is facilitated.

FIGS. 24A and 24B are perspective views showing the essential parts of a seventeenth embodiment of the pipe fan according to the present invention. This shows another configuration example of the connection duct 11 and the fixed frame 15 constituting the first embodiment shown in FIG. 1, and the connection duct of the present invention is formed by an indoor connection duct 70 and an outdoor connection duct 80. And a function of a fixed frame. Here, the indoor side connection duct 70 is a tubular portion 71.
And a flange portion 72 connected to one end of the cylindrical portion 8. The outdoor connection duct 80 is a cylindrical portion 8 inserted into the cylindrical portion 71.
1 and a flange portion 82 connected to one end thereof. Of these, a through-hole 73 for passing the binding band member 19 is formed in the flange 72 at a position where the circumferential direction is divided into two equal parts, and a similar through-hole 83 is formed at a position corresponding to the through-hole 73 of the flange 82. ing. Therefore, the cylindrical portion 7 of the indoor side connection duct 70 is inserted from the indoor side of the pre-drilled wall hole.
1 is inserted, the cylindrical portion 81 of the outdoor connection duct 80 is inserted from the outdoor side, and the cylindrical portion 81 is fitted into the cylindrical portion 71. Then, the binding band member 19 is inserted into the through holes 73 and 83 formed in the opposed flange portions 72 and 82, respectively, and the flange portion 7 is
2 and 82 are pressed against and fixed to the inner and outer wall surfaces. Thereby, the pipe can be easily attached regardless of the wall thickness.

As shown in (b), an engagement hole 74 is formed at the other end of the cylindrical portion 71, and a claw portion 84 is formed at the other end of the flange 82, and these are engaged with each other. After temporarily fixing the indoor connection duct 70 and the outdoor connection duct 80,
The workability can be improved by performing the work of fastening and fixing by the binding band member 19.

FIGS. 25A and 25B are perspective views showing the essential parts of an eighteenth embodiment of the pipe fan according to the present invention. In the figure, components having the same functions as those in FIG. 24 are denoted by the same reference numerals, and description thereof will be omitted. This embodiment is shown in FIG.
Instead of temporarily fixing with the engagement hole 74 and the claw portion 84 shown in FIG. 4, a positioning rib 75 is formed on the inner peripheral surface of the cylindrical portion 71, and a positioning groove 85 is formed on the outer peripheral surface of the cylindrical portion 81. By fitting them together, the through holes 73 and 83 can be positioned so as to face each other. In this case, as shown in (b), the engagement of the tubular portions 71 and 81 is facilitated by providing the attraction inclined portion 86 at the end of the positioning groove 85.

FIG. 26A is a perspective view showing a main part of a nineteenth embodiment of the pipe fan according to the present invention, and FIG.
FIG. 6B is an enlarged perspective view showing an end of the cylindrical portion. In this embodiment, the positioning of the indoor side connection duct 70 and the outdoor side connection duct 80 and the accommodation of the binding band member are achieved by one element, and a square groove-shaped binding band member is formed on the outer peripheral portion of the cylindrical portion 71. As for the pipe 77, a pipe 87 for a binding band member in the form of a square pipe is formed on the outer periphery of the cylindrical portion 81. Then, the tubular portion 81 is fitted into the tubular portion 71, and at the same time, the binding band member conduit 87 is fitted into the binding band member conduit 77. In this case, the inclined surface 77a is formed inside the end of the binding band member duct 77, and the inclined surface 87a is formed outside the end of the binding band member duct 87, so that the fitting and insertion is easier. Also has the effect of becoming

[0071]

As is apparent from the above description, according to the present invention, there is provided a pipe fan capable of facilitating construction and repair / replacement even when the wall thickness of the building is different. be able to.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a configuration of a first embodiment of a pipe fan according to the present invention.

FIG. 2 is an exploded perspective view of the embodiment shown in FIG.

FIG. 3 is a partial sectional view showing the configuration of a second embodiment of the pipe fan according to the present invention.

FIG. 4 is a partial perspective view showing a configuration of a third embodiment of a pipe fan according to the present invention.

FIG. 5 is a partial sectional view and a partial perspective view showing a configuration of a fourth embodiment of a pipe fan according to the present invention.

FIG. 6 is a partial sectional view and a plan view showing a configuration of a fifth embodiment of a pipe fan according to the present invention.

FIG. 7 is a sectional view showing a configuration of a sixth embodiment of a pipe fan according to the present invention, and a perspective view showing an assembled state.

FIG. 8 is a partial sectional view showing a configuration of a seventh embodiment of a pipe fan according to the present invention.

FIG. 9 is a perspective view showing a configuration of an eighth embodiment of a pipe fan according to the present invention, and a cross-sectional view of main parts.

FIG. 10 is a view showing a range of expansion and contraction dimensions corresponding to the thickness of a wall which connects the bellows portion and the fixing frame according to each of the embodiments and is sandwiched between flanges.

FIG. 11 is a perspective view and a partial cross-sectional view illustrating a configuration of a ninth embodiment of a pipe fan according to the present invention.

FIG. 12 is a perspective view and a mounting state diagram showing details of the embodiment shown in FIG. 11;

FIG. 13 is a partial sectional view showing a configuration of a tenth embodiment of a pipe fan according to the present invention.

FIG. 14 is a partial sectional view showing the configuration of an eleventh embodiment of a pipe fan according to the present invention.

FIG. 15 is a perspective view and a longitudinal sectional view showing a configuration of a twelfth embodiment of a pipe fan according to the present invention.

FIG. 16 is a modified example of the binding band member constituting the pipe fan according to the present invention.

FIG. 17 is a perspective view showing a mounted state of a bow spring on a pipe fan main body, showing a twelfth embodiment of a pipe fan according to the present invention, and a side view showing an example of a mounting screw thereof.

FIG. 18 is a perspective view and a main part enlarged cross-sectional view showing a modification of the bow spring attached to the pipe fan body of each embodiment.

FIG. 19 is a view showing a modification of the leaf spring shown in FIG. 18;

FIG. 20 is a perspective view and a partial cross-sectional view showing a main part of a thirteenth embodiment of a pipe fan according to the present invention.

FIG. 21 is a side view and a partial cross-sectional view showing a main part of a fourteenth embodiment of a pipe fan according to the present invention.

FIG. 22 is a perspective view and a partial perspective view showing a main part of a fifteenth embodiment of the pipe fan according to the present invention.

FIG. 23 is a perspective view showing a main part of a sixteenth embodiment of the pipe fan according to the present invention.

FIG. 24 is a perspective view showing a main part of a seventeenth embodiment of a pipe fan according to the present invention.

FIG. 25 is a perspective view showing a main part of an eighteenth embodiment of the pipe fan according to the present invention.

FIG. 26 is a perspective view showing a main part of a nineteenth embodiment of a pipe fan according to the present invention, and an enlarged perspective view showing an end of a tubular portion.

FIG. 27 is an explanatory view showing a configuration of a conventional pipe fan and a construction method for mounting the pipe fan on a wall.

[Explanation of symbols]

 1, 2 wall material 4 pipe fan body 6 outer wall member 9 cylindrical portion 10a electric motor 11b blade 11 connecting duct 9a, 12a, 16a, 72, 82 flange portion 12b annular member 13 square hole 15 fixing frame 16a flange portion 17, 23 nail Part 18 Lock mechanism part 19 Binding band member 22 Guide 24 Handle 25, 27 Engagement part 30 Cylindrical covering part 34, 40, 55, 65 Spring 70 Indoor connection duct 80 Outdoor connection duct

Continued on the front page (72) Inventor Tsukihara Yuji 336 Tatehara, Fuji-shi, Shizuoka Toshiba Carrier Co., Ltd. (72) Inventor Satoru Nomura 336 Tatehara, Fuji-shi, Shizuoka Toshiba Carrier F-term (reference) 3L058 BD01 BE00 BG01 BG05

Claims (21)

[Claims] 1. A pipe fan provided with a blower therein and mounted in a pre-drilled wall hole, wherein an outer diameter is formed smaller than an inner diameter of said wall hole,
At one end of the cylindrical portion formed to be expandable and contractible in the axial direction, a flange portion having an outer diameter larger than the opening portion of the wall surface is provided, and the flange portion is brought into contact with one wall surface so that the cylindrical portion is A connecting duct inserted into the wall hole, and an outer diameter formed to be smaller than the inner diameter of the wall hole, and an opening in the wall formed at one end of the tubular portion formed to be fittable with the tubular portion of the connecting duct. A flange portion having an outer diameter larger than that of the connecting portion, and the other end of the cylindrical portion is fitted to the other end of the cylindrical portion of the connection duct by abutting the flange portion on the other wall surface. A fixed frame that is engaged and connected by a locking piece formed on the portion, and an outer diameter larger than an opening in a wall surface at one end of a cylindrical portion having an outer diameter smaller than the inner diameter of the connection duct. A blower is mounted inside the cylindrical portion, and the flange portion is connected to a flange portion of the connection duct; By connecting and tightening a pipe fan main body in which a tubular portion disposed outside and to which the blower is attached is inserted into a tubular portion of the connection duct, a flange portion of the connection duct and a flange portion of the fixed frame. A pipe fan, comprising: a binding member that binds each other in a direction of pressing against a wall surface; and an outer wall member such as a pipe hood or a bend cap attached to an opening of the fixed frame. 2. The pipe fan according to claim 1, wherein the tubular portion of the connecting duct is made of bellows. 3. The binding member is formed in an elongated thin plate from a base bent in a hook shape to a tip, and is slidable from the tip to the base in a predetermined range on at least one surface.
A band portion having a saw-toothed uneven surface for preventing sliding from the base portion to the tip end, an opening capable of inserting the band portion, and meshing with the saw-toothed uneven surface with a predetermined pressure And a locking ring portion having an engagement claw that performs sliding and blocking of sliding corresponding to the shape of the serrated uneven surface, wherein the flange portion of the connection duct and the flange portion of the fixed frame face each other. An opening through which the band portion is inserted is formed at the same position in the circumferential direction, from the outside of one of the flanges of the connection duct and the flange of the fixed frame to the outside of the other one of the openings. The band portion is inserted, a locking ring portion is meshed with the tip of the band portion, and a hook-shaped base of the band portion and the locking ring portion define a flange portion of the connection duct and the fixing frame. The pipe fan according to claim 1, wherein the flange portion is fastened and fixed. 4. The pipe fan according to claim 3, wherein one of the flange portions is a flange portion of the connection duct, and the other flange portion is a flange portion of the fixed frame. . 5. A hook-shaped bent base of the band portion has a predetermined thickness, and a flange portion of the connecting duct has an axially projecting projection portion and a distal end portion having a radially elastically deformable projection. 5. The pipe fan according to claim 4, wherein an opening formed in one of the base and the projection and a claw formed in the other are engaged with each other. 6. The inside of the other end of the cylindrical portion of the connecting duct,
The other end of the fixed frame is inserted, the other ends are engaged with each other, and the end portion of the band portion is inserted through the outer peripheral surface of the other end of the connection duct, and an opening for holding the position is provided. The pipe fan according to any one of claims 3 to 5, further comprising a portion. 7. The pipe fan body has at least two circumferentially divided flange portions fitted to the outer peripheral edge of the flange portion of the connection duct, and has a tip projecting radially elastically deformable. A claw portion facing inward in the radial direction has an engaging portion that engages with a flange portion of the connection duct by elastic deformation, and the pipe fan is connected to the connection duct in accordance with the removal of the engagement portion. The pipe fan according to any one of claims 1 to 6, wherein the main body is detachable. 8. The pipe fan according to claim 7, further comprising a decorative grill which covers a flange portion of said pipe fan main body including said engaging portion. 9. A radially uneven portion meshing with each other is formed on an inner end surface of a claw portion of the engagement portion and a flange portion of the connection duct engaged with the claw portion. 9. The pipe fan according to claim 7, wherein the circumferential length of the uneven portion formed on the inner end surface of the portion is longer than the circumferential length of the claw portion. 10. 10. A claw portion utilizing elasticity is provided on one of the flange portion of the fixed frame and the outer wall member, and an engagement groove for engaging with the claw portion is provided on one of the other. The pipe fan according to any one of claims 1 to 9, wherein the outer wall member can be attached to and detached from the fixed frame in accordance with the hanging of the engaging groove. 11. The device according to claim 10, wherein the circumferential length of the engaging groove is formed longer than the circumferential length of the claw portion, and the outer wall member is rotatable in the circumferential direction. Pipe fan. 12. The outer wall member has a cylindrical portion that covers the flange portion of the fixed frame, and an annular portion formed integrally with the cylindrical portion. The pipe fan according to any one of claims 1 to 11, wherein the pipe is formed to be longer than an axial dimension of the flange portion of the fixed frame. 13. A pipe-shaped spring which is curved in a radially outward direction and has one end fixed to an outer peripheral surface of a cylindrical portion of said pipe fan main body, and said pipe fan is elastically resilient to said pipe fan. The pipe fan according to any one of claims 1 to 12, wherein a main body is detachable from the connection duct. 14. The connecting duct, when the other ends of the connecting duct and the fixed frame are fitted to each other, sets a distance between the flange of the connecting duct and the flange of the fixed frame to 9 mm.
The pipe fan according to any one of claims 1 to 13, further comprising a tubular portion that expands and contracts in a range of 5 mm to 220 mm. 15. A plurality of press-contact pieces having a free end extending inward in the axial direction and having an elasticity bent inward in the radial direction are provided at a plurality of locations in the circumferential direction on the inner peripheral surface of the flange portion of the connection duct, The pipe fan according to any one of claims 1 to 12, wherein the press-contact piece holds a tubular portion of the pipe fan body. 16. A plurality of projections each having a slit penetrating in a radial direction are provided at a plurality of circumferential positions on an outer end surface of a flange portion of the connection duct, and a plurality of protrusions are provided at a base end of the press-contacting piece. Forming a cut-and-raised elastic projection, and inserting a portion where the elastic projection is formed into a slit of the projection;
The pipe fan according to claim 15, wherein a base end of the press-contact piece is fixed so as to prevent the elastic protrusion from coming off. 17. An engagement release mechanism for releasing the engagement state of the engagement claw of the locking ring portion engaged with the serrated uneven surface of the band portion by an external operation. The pipe fan according to claim 3 or 4, wherein: 18. The pipe fan according to claim 13, further comprising a tightening mechanism for removably fastening one end of said plate-shaped spring to said pipe fan main body. 19. The pipe fan according to claim 10, further comprising an engagement releasing means for releasing an engagement state of said claw portion with said engagement groove by an external operation. 20. The engaging groove is a concave / convex groove which is continuous in the circumferential direction in a saw-tooth shape. The claw portion is formed so as to be slidable in the concave / convex groove, and the outer wall member is rotated in the peripheral direction. The pipe fan according to claim 10, wherein a mounting angle of the outer wall member is variable. 21. A pipe fan provided with a blower therein and mounted in a pre-drilled wall hole, wherein an outer diameter is formed smaller than an inner diameter of said wall hole.
A first duct having a flange portion having an outer diameter larger than the opening portion of the wall surface, the flange portion being in contact with one wall surface, and the cylindrical portion being inserted into the wall hole; One end of the cylindrical portion formed to be smaller than the inner diameter of the wall hole and slidable in the axial direction by fitting with the cylindrical portion of the first duct has an outer diameter smaller than the opening of the wall surface. A second duct in which the cylindrical portion is inserted into the wall hole by contacting the flange portion with the other wall surface, and an outer diameter is formed smaller than an inner diameter of the connection duct. One end of the cylindrical portion has a flange portion having an outer diameter larger than the opening of the wall surface, a blower is attached inside the cylindrical portion, and the flange portion is arranged outside the flange portion of the duct. The tubular part, to which the blower is attached, is inserted into the tubular part of the first duct. A main body, a binding member that binds each other in a direction of pressing against a wall surface by connecting and tightening the flange portion of the first duct and the flange portion of the second duct, and is attached to the opening of the fixed frame. A pipe hood or an outer wall member such as a bend cap.