JP3108254B2 - Seal member for ventilation fan for duct - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing member for a duct ventilation fan for sealing between an exhaust port of a duct ventilation fan and a duct connected to the exhaust port.

[0002]

2. Description of the Related Art As shown in FIG.
A blower 2 is provided in a main body case 1, a suction port 1 a is formed on a lower surface of the main body case 1, and an exhaust port body 3 is attached to a side surface. A duct 4 is connected to the exhaust port body 3.
When the blower 2 operates, air is sucked into the main body case 1 and discharged to the outside through the duct 4 as shown by the arrow.

[0003] By the way, in the duct ventilation fan,
If there is a gap between the exhaust port 3 and the duct 4, air leaks at the time of air suction, and the ventilation capacity is reduced. Therefore, conventionally, a tape 5 as a sealing member is wound so as to straddle between the exhaust port body 3 and the duct 4, or caulking is performed by a caulking material (not shown) as a sealing member. , Exhaust port body 3 and duct 4
The space was sealed. However, in this case, there is a problem that the workability is reduced due to the complexity of the winding operation and the caulking operation of the tape 5.

Therefore, in order to eliminate the winding operation and the caulking operation of the tape 5, conventionally, as shown in FIG. 10, a tapered cylindrical portion 6 a and an outwardly projecting annular seal portion 6 b are used. It has been considered to use a sealing member 6 made of: In order to seal the exhaust port body 3 and the duct 4 with the sealing member 6, first, the cylindrical portion 6a
Is pressed into the outer periphery of the exhaust port body 3 and then the duct 4 is inserted into the outer periphery of the cylindrical portion 6a. Then, the seal portion 6b is compressed and shrunk by the inner surface of the duct 4, and the seal portion 6b is brought into close contact with the inner surface of the duct 4 by its elastic return force, thereby sealing between the exhaust port body 3 and the duct 4.

[0005]

However, in the conventional sealing member 6 described above, the sealing portion 6b is
As shown in FIG. 11, wrinkles are generated in the seal portion 6b, and thus the seal portion 6b
However, there is a problem that the seal does not sufficiently adhere to the inner surface of the duct 4 and a reliable sealing property cannot be obtained.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sealing member of a ventilation fan for a duct which has good workability and has a reliable sealing property.

[0007]

SUMMARY OF THE INVENTION The present invention is used for a duct ventilation fan having a blower therein and an exhaust port provided on a side surface thereof, and the duct connected to the exhaust port and the exhaust port. position in the sealing member ventilators duct for sealing a tubular portion to the inner diameter placed over the outlet body is set greater than the maximum duct outer diameter, its inner to said tubular portion between the It includes universal an inner diameter stretch and is a sealing portion of the annular becomes smaller than the minimum duct outer diameter, the cylindrical portion
The exhaust port body is covered by the exhaust port body.
A gap is formed between the outer peripheral surface of the
Then, based on that the cylindrical portion is put on the exhaust port body
The seal portion faces the outer peripheral surface of the exhaust port body,
A band for fastening to an end of the cylindrical portion on the exhaust port side.
But that having a feature to where it is attached.

[0008]

According to the above means, when connecting the duct to the exhaust port of the ventilation fan for the duct, the cylindrical portion of the seal member must be
Put on the exhaust port body. Next, exhaust gas from the cylindrical portion of the seal member
Attach a band to the end of the mouth and tighten the tube to the exhaust port
And fix it. After this, the gap between the outer peripheral surface of the exhaust port body and the cylinder
Insert a duct between them. In this case, the seal portion is pushed open by the outer surface of the duct, the seal portion is sufficiently close contact with the outer surface of the duct by its elastic restoring force, to reliably seal between the outlet body and the duct. Therefore, as compared with the related art in which a tape or a caulking material is used as a sealing member, not only the workability is improved, but also in contrast to the related art in which the sealing portion is compressed by the inner surface of the duct, wrinkles are generated in the sealing portion. Can be prevented, and the sealing property is also improved.

Also, the duct contacts the outer peripheral surface of the exhaust port body.
The seal between the two is based on
The seal part of the
Therefore, the space between them is sealed. Because of this,
Since air leakage is prevented twice, sealing performance is further improved.
improves. Also, the sealing portion of the sealing member may be outside the exhaust port body.
Since the exhaust port body is viewed from the axial direction
In this case, the end face of the exhaust port body is not
It becomes. For this reason, the exhaust port
The duct can be inserted into the outer peripheral surface of the body,
Workability is improved. Also, the exhaust port body of the cylindrical portion of the seal member
The band for clamping the end portion of the side is provided et the, cylindrical portion
Is difficult to get out of the exhaust port body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic structure of the present invention will be described below with reference to FIGS. First, in FIG. 3, a mounting frame 11 b provided on a ceiling plate 11 a of a room 11 has
The duct ventilation fan 13 is attached so as to be located on the side. The duct ventilation fan 13 is configured by housing a blower 15 and the like in a main body case 14.
A suction port 14a that opens into the room 11 is formed on the lower surface of the chamber 11, and an exhaust port 14b is formed on the side surface.
Is provided with an exhaust port body 16. In this case, the exhaust port body 16 has a truncated conical shape whose diameter gradually decreases from the base end toward the distal end, and the distal end has a short cylindrical shape. The exhaust port body 16 has an outer diameter dimension R.
Duct 17 is connected via a seal member 18.

The outer diameter R of the duct 17 is a standard value, and the actual outer diameter has a variation due to a manufacturing error or the like. Therefore, the standard value R is set as follows. (Reference value R0−α1) ≦ Specification value R ≦ (Reference value R0 + α2) As shown in FIG. 1, the seal member 18 has a cylindrical portion 19 and an annular shape projecting inward from the cylindrical portion 19. Seal part 20
Are formed integrally with a soft member.
Is the maximum duct outer diameter (reference value R0 + α)
2) The inner diameter R2 of the seal portion 20 is set larger than
Is set smaller than the minimum duct outside diameter (reference value R0-α1). Moreover, the seal portion 20 is formed so as to be inclined such that its inner peripheral side is directed toward the exhaust port 14b.

Next, a procedure for connecting the duct 17 to the exhaust port body 16 will be described. First, the cylindrical portion 19 of the seal member 18 is pressed into the outer periphery of the base portion of the exhaust port body 16,
The seal member 18 is attached to the exhaust port body 16. Then, when the duct 17 is inserted into the cylindrical portion 19 from the right side, as shown in FIG. 2, the seal portion 20 is pushed and expanded by the duct 17, and the seal portion 20 is resiliently restored by the elastic return force.
To seal the space between the exhaust port body 16 and the duct 17.

According to the above configuration , since the seal portion 20 is pushed and expanded by the duct 17, unlike the conventional configuration in which the seal portion is pushed and contracted by the duct,
Wrinkling of the seal portion 20 can be prevented. As a result, the outer periphery of the seal portion 20 comes into close contact with the duct 17, and the sealing performance of the seal portion 20 is improved.
In addition, in sealing the exhaust port body 16 and the duct 17, it is only necessary to insert the duct 17 into the cylindrical portion 19, and it is not necessary to perform a troublesome operation such as winding or caulking of the tape. Is improved. The cylindrical portion 19
Is placed on the outer peripheral surface of the exhaust port body 16 and the duct 1 is
7 is inserted, the duct 17 is formed on the outer peripheral surface of the exhaust port body 16.
, And the seal portion 20 is located on the outer peripheral surface of the duct 17.
Adhere to Therefore, air leakage from the exhaust port body 16
Since double prevention is achieved, the sealing performance is further improved. Ma
In addition, the seal portion 20 is opposed to the outer peripheral surface of the exhaust port body 16.
Therefore, when the exhaust port body 16 is viewed from the axial direction, the exhaust port body 1
6 is not hidden by the seal portion 20
You. For this reason, the end surface of the exhaust port body 16 is used as a mark to
Duct 17 can be inserted into the gap, so insert duct 17
Workability is improved. Further, since the inner diameter R1 of the cylindrical portion 19 is set to be larger than the maximum outer diameter of the duct (reference value R0 + α2), the standard duct 17 can be inserted into the cylindrical portion 19 without any trouble. In addition, since the inner diameter R2 of the seal portion 20 is set smaller than the minimum outer diameter of the duct (reference value R0-α1), if the duct 17 is a standard product, the seal portion 20 sufficiently adheres to the outer periphery of the duct 17. In general, the sealing performance can be improved and the sealing operation can be simplified for all the standard ducts 17.

Further, since the seal portion 20 is formed so as to be inclined such that the inner peripheral side thereof is directed toward the exhaust port 14b (the direction in which the duct 17 is inserted), resistance when the duct 17 is inserted into the cylindrical portion 19 is reduced. This makes it easier to insert the duct 17. Moreover, since the cylindrical portion 19 and the seal portion 20 are integrally formed, the seal member 18 can be manufactured at relatively low cost.

Next, a first embodiment of the present invention will be described with reference to FIG. In addition, about the same part as the said basic structure ,
The description is omitted by attaching the same reference numerals, and only different portions will be described below. In this case, the duct ventilation fan 13
An exhaust port body 21 in which a large-diameter cylindrical portion 21a and a small-diameter cylindrical portion 21b are combined is attached to the exhaust port 14b. In connecting the duct 17 to the exhaust port body 21, first, the cylindrical portion 21a of the exhaust port body 21
The cylindrical portion 19 of the seal member 18 is fitted around the outer periphery of the cylindrical portion 19.
Is fastened and fixed by the band 22. And the above basics
As in the configuration , the duct 17 is inserted into the cylindrical portion 19.

In this case, the band fastening operation of the cylindrical portion 19 is performed as follows.
Since the operation is performed before the ventilation fan 13 for the duct is installed on the ceiling 12, the work is relatively easy and the ceiling 1 is difficult to work.
In 2, it is only necessary to insert the duct 17 into the cylindrical portion 19. In contrast, conventional tape winding and caulking operations are performed behind the ceiling. Therefore, in this embodiment, although the number of man-hours is larger for the band 22 tightening work, the workability is better than the conventional one in which tape winding and caulking are performed. Therefore, according to the present embodiment, it is possible to improve not only the sealability but also the workability as well as the basic configuration . Moreover, the cylindrical portion 1 is attached to the exhaust port body 21.
Since the band 9 is fastened to the band, there is no possibility that the seal member 18 may come off the exhaust port body 21.

Next, a second embodiment of the present invention will be described with reference to FIGS.
It will be described based on. The same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
Only different parts will be described.

In this case, the seal member 23 is formed by integrally molding the cylindrical portion 19 and two rows of annular seal portions 24, 24 with a soft member. He is pointing straight ahead. Also in this case, the inner diameter of each seal portion 24 is set to R2 smaller than the minimum outer diameter of the duct (reference value R0 -α1). Thus, in connecting the duct 17 to the exhaust port body 21, the cylindrical portion 2 of the exhaust port body 21 is connected similarly to the first embodiment.
1a is fitted to the outer periphery of the cylindrical portion 19, and the cylindrical portion 19 is
Then, the duct 17 is inserted into the cylindrical portion 19.

According to the present embodiment, each seal portion 24 is brought into close contact with the outer periphery of the duct 17 by its elastic restoring force, and seals between the exhaust port body 16 and the duct 17. Therefore, the same effect as that of the first embodiment can be obtained, and of course, since there are two seal portions 24, as shown in FIG.
The contact area between the seal 7 and the seal portion 24 is increased, and the sealing performance is further improved.

Next, a third embodiment of the present invention will be described with reference to FIG. Note that the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different parts will be described.

In this case, the seal member 25 is composed of a cylindrical portion 26, a short cylindrical mounting portion 27, and a seal portion 28 provided on the mounting portion 27. The cylindrical portion 26 is made of a hard material, The mounting portion 27 and the seal portion 28 are integrally formed from a soft material. And the seal part 28 is attached to the mounting part 2.
7 is fixed to the outer peripheral surface of the cylindrical portion 26 by press-fitting. The inner diameter of the cylindrical portion 26 is set to R1 larger than the maximum outer diameter of the duct (reference value R0 + α2), and the inner diameter of the seal portion 28 is set to the minimum outer diameter of the duct (reference value R).
0−α1) R2 is set to be smaller than 0−α1).

According to the present embodiment, when the duct 17 is connected to the exhaust port body 21, the cylindrical portion 2 of the exhaust port body 21 is connected.
The cylindrical portion 26 of the seal member 25 is fitted to the outer periphery of 1a, and the cylindrical portion 26 is tightened and fixed by the band 22. Then, the duct 17 is inserted into the cylindrical portion 26. When the duct 17 is inserted, a pulling force in the direction of the arrow acts on the cylindrical portion 26 via the seal portion 28. However, since the cylindrical portion 26 is formed of a hard material and has relatively high rigidity, the cylindrical portion 26 has a relatively high rigidity. The deformation of the cylindrical portion 26 can be prevented. Therefore, the duct 17 does not become difficult to insert due to the deformation of the cylindrical portion 26, and as a result,
Workability is further improved.

Next, a fourth embodiment of the present invention will be described with reference to FIG. Note that the same parts as those in the third embodiment are denoted by the same reference numerals and description thereof will be omitted, and only different parts will be described below. In this case, the sealing member 29
Is a cylindrical portion 26, a mounting portion 30, and two rows of annular seal portions 3.
The mounting portion 30 and the seal portions 31, 31 are integrally formed from a soft material. Each of the seal portions 31 is directed straight inward of the cylindrical portion 26, and has an inner diameter that is equal to a minimum duct outer diameter (a reference value R0).
-Α1) R2 is set to be smaller.

According to the present embodiment, as in the third embodiment, when the duct 17 is inserted into the cylindrical portion 26, each seal portion 31
Is brought into close contact with the outer periphery of the duct 17 due to its elastic restoring force,
The space between the exhaust port body 21 and the duct 17 is sealed. Therefore, the contact area between the duct 17 and the seal portion 31 increases, and the sealing performance is further improved.

In the second embodiment, the seal portions 24 are provided in two rows, and in the fourth embodiment, the seal portions 31 are provided.
Are provided in two rows, but the number of the seal portions 24 and 31 may be provided in three or more rows. Furthermore, the second and the sealing part 2 4 and 31 in the fourth embodiment, was straight directed inwardly of the cylindrical portion 19 and 26, the insertion direction (exhaust port 14b of the inner peripheral side duct 17 that May be formed in an inclined shape pointing in the direction (direction). In this case, the work of inserting the duct 17 is facilitated .

As is apparent from the above description, the sealing member of the ventilation fan for duct according to the present invention has the following excellent effects.

[0026] Since it seals between the cylindrical portion and the duct by the elastic restoring force of the expanding diameter and seal unit, it is possible to prevent the wrinkle in the seal portion. As a result, the sealing portion comes into close contact with the duct, and the sealing performance is improved. In addition, since the sealing between the exhaust port body and the duct is performed only by inserting the duct into the cylindrical portion of the sealing member, workability is improved. In addition, the inner diameter of the cylinder is larger than the outer diameter of the maximum duct, and the inner diameter of the seal is set smaller than the outer diameter of the minimum duct. Work can be simplified.

Further, a gap is provided between the cylindrical portion and the outer peripheral surface of the exhaust port body.
A gap for inserting the connector was formed. For this reason, from the exhaust port body
Air leakage is prevented twice, further improving the sealing performance.
Up. Also, make the seal part face the outer peripheral surface of the exhaust port body.
Was. For this reason, the above-described clearance is set using the end face of the exhaust port body as a mark.
The duct can be inserted into the
Workability is improved. Also, fasten the end of the cylinder to the exhaust port side.
Since a band for attachment is provided, the cylinder part can be pulled out of the exhaust port body.
It will be difficult.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a basic configuration of the present invention.

FIG. 2 is a diagram corresponding to FIG. 1 in a state where a duct is connected to an exhaust port body.

FIG. 3 is a longitudinal side view of a duct ventilation fan and a duct.

FIG. 4 is a view corresponding to FIG. 1, showing a first embodiment of the present invention;

FIG. 5 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 6 is a diagram corresponding to FIG. 2;

FIG. 7 is a view corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 1, showing a fourth embodiment of the present invention.

FIG. 9 is a diagram corresponding to FIG. 3 showing a conventional example.

FIG. 10 is a diagram corresponding to FIG. 1 showing another conventional example.

FIG. 11 is a perspective view showing a state where wrinkles are generated in a seal portion.

[Explanation of symbols]

13 is a duct ventilation fan, 15 is a blower, 16 is an exhaust port body, 17 is a duct, 18 is a sealing member, 19 is a cylindrical portion, 2
0 is a seal portion, 21 is an exhaust port body, 22 is a band, 23 is a seal member, 24 is a seal portion, 25 is a seal member, 26
Indicates a cylindrical portion, 28 indicates a seal portion, 29 indicates a seal member, and 31 indicates a seal portion.

Claims (1)

(57) [Claims] 1. A ventilation fan for a duct having a blower inside and an exhaust port provided on a side surface for sealing between the exhaust port and a duct connected to the exhaust port. It is one, placed over the outlet body, and a cylindrical portion which is set to greater than the maximum duct outer diameter inner diameter, located in the inwardly the cylindrical section, telescoping the inner diameter minimum duct An annular seal portion smaller than an outer diameter dimension , wherein the cylindrical portion is covered with the exhaust port body.
The duct is inserted between an outer peripheral surface of the exhaust port body.
A gap is formed, and the cylindrical portion of the seal portion is covered with the exhaust port body.
The outer peripheral surface of the exhaust port body is opposed to the cylindrical portion, and the cylindrical portion is fastened by being positioned at the end on the exhaust port side.
A sealing member for a ventilation fan for a duct, wherein a sealing band is attached .