JPH0317164Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a ceiling ventilation fan with an improved body frame structure.

[Technical background of the invention] Conventionally, in this type of ceiling ventilation fan, as shown in Fig. 6, one of the edges 2 of the ceiling 1 is equipped with a duct connection port 3, and the upper edge is equipped with a duct connection port 3. A mounting plate 5 having an engagement recess 4 is attached, and an impeller 8 and a motor 9 are attached to the mounting plate 5, which has an exhaust port 6 and an engagement protrusion 7.
In addition, the main body frame 12 in which the blower device 11 consisting of the casing 10 and the like is installed is inserted into the opening 1 of the ceiling 1 from below.
3 and insert the engaging convex portion 7 into the mounting plate 5.
The exhaust port 6 is positioned to align with the connection port body 3 by engaging with the engagement recess 4 of On the other hand, a decorative cover 14 is attached to cover the opening 15 on the lower surface of the decorative cover and the opening 13 in the ceiling 1.

In the above-mentioned device, the main body frame 12 has a main body portion 16 which is formed so as to integrally include side walls on one side and the remaining three sides, as shown in FIG.
The exhaust port 6 is formed on the side plate 17, and the engagement convex portion 7 is formed on the top plate 18. The top plate 18 was attached from the inside (lower side) to a joining flange 19 formed inward on the entire upper edge of the main body 16, and the side plates 17 were formed on both end edges of the main body 16, also facing inward. Joining flange 2
0 from the inside and are integrally connected to the main body portion 16 by spot welding or the like.

[Problems with the Background Art] The conventional technology described above had the following problems.

By applying the side plate 17 to the joining flange 20 from the inside, a stepped portion corresponding to the thickness of the joining flange 20 is created on both sides of the side plate 17, and this stepped portion causes the side plate 17 to be attached to the mounting plate 5. If the mounting plate 5 cannot be placed in close contact with the mounting plate 5, a gap may be created between the mounting plate 5 and the air may leak from this gap. To prevent this, a seal 2 as shown in FIG. 8 is installed on the side plate 17.
1 must be attached separately, which increases manufacturing costs.

In this case, if the side plates 17 are applied to the joining flanges 19 and 20 of the main body part 16 from the outside, there will be no step portions on both sides of the side plates 17, and the seals 21 can therefore be made unnecessary. However, in such a case, when the body frame 12 after assembly is painted by dipping it in a paint bath, the paint will easily pass through and come out as shown by the arrow in Fig. Paint remains on the outside in a dripping manner, making it look unsightly. Moreover, in this case, the edge 17a of the side plate 17 is exposed at the outer corner of the main body frame 12, and there is a high risk of injury by touching it.

Since the side plate 17 and the top plate 18 are separately required for the main body portion 16, the number of parts is large and the manufacturing cost is high.

In this case as well, the main body 16 may be configured to include the side plate 17 in one piece, but in such a case, the mold for cutting out or bending the main body 16 from a blank becomes extremely large, and the device becomes difficult to use. Cost increases. Also, the side plate 17 and the upper plate 18 are
It is also conceivable to configure it in one piece as shown in the figure, but in this case, it would be complicated to form the engaging protrusion 7', especially so that there would be no gap in the engaging protrusion 7' itself. Moreover, it requires many steps and increases the manufacturing cost.

[Purpose of the invention] The present invention was made in view of the above-mentioned circumstances, and its purpose is to eliminate the need for seals without impairing the appearance or risk of injury, and to increase the size of the mold. To provide an excellent ceiling ventilation fan capable of reducing the number of parts without complicating or increasing the number of processes.

[Summary of the invention] The present invention includes a main body frame that integrally includes a first side wall having an exhaust port and in close contact with the mounting plate, and second and third side walls that are continuous on both sides of this side wall. An inward joining flange is formed at each upper edge of the second and third side walls and at each end edge of the second and third side wall, and engages with the joining flange edge of the first side wall. A main body portion having a convex portion formed thereon, a fourth side wall facing the first side wall, and an upper wall connected above the fourth side wall are integrally formed, and the upper wall is connected from the inside to the first, second and third side walls. a supplementary part that is integrally connected to the main body part, the fourth side wall being attached to the joining flange at each upper edge of the side wall, and the fourth side wall being connected to the joining flange at each end edge of the second and third side walls; The present invention is characterized in that it is configured by the following, thereby eliminating the need for a seal and reducing the number of parts.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to FIGS. 1 to 4. First, in Figure 2, 31
is a ceiling, in which an opening 33 is formed along a field edge 32. Reference numeral 34 denotes a mounting plate, which is equipped with a duct connection port 35 and has an engagement recess 36 formed at its upper edge, while a mounting flange 37 is formed at its lower edge, allowing for easy installation. The flange 37 is attached to one of the edges 32 (on the right side in the figure) by tightening it with a wood screw (not shown). On the other hand, 38 is a main body frame, which, as shown in detail in FIG. The supplementary part 46 is composed of a main body part 43 integrally equipped with a main body part 43, and a supplementary part 46 integrally equipped with a fourth side wall 44 facing the first side wall 40 and an upper wall 45 continuous above this. The portion 43 includes upper edges of the first, second and third side walls 40, 41 and 42 and the second and third side walls 41.
and 42 are formed with inward joining flanges 47 and 48, respectively, and the first side wall 40
An engaging protrusion 49 is formed on the edge of the joining flange 47. With respect to the main body part 43 formed in this manner, the supplementary part 46 is advanced from the inside and the upper wall 45 thereof is
The first, second and third side walls 40, 41 and 42
and the fourth side wall 44 to the joining flanges 48 at the end edges of the second and third side walls 41 and 42, respectively, by spot welding, for example. Then, as shown in FIG.
8. Reference numeral 50 designates mounting flanges formed outward at the lower edges of the first, second, and third side walls 40, 41, and 42 of the main body portion 43; A mounting flange 51, which is also formed outward at the lower edge of the fourth side wall 44, is longer than the mounting flange 50 of the main body 43 and projects further outward from both side edges of the fourth side wall 44. Both mounting flanges 50 and 51 are connected continuously to eliminate air leakage. In this case, a mounting flange 50 formed at the lower edge of the first side wall 40 of the main body 43
On the other hand, the mounting flange 37 formed on the lower edge of the mounting plate 34 is also longer and protrudes further outward from both side edges of the mounting plate 34. The notches 52 at each corner of the air conditioner 50 are closed to prevent air leakage as described above. Furthermore, a blower device 56 consisting of a motor 53, an impeller 54, a casing 55, etc. is disposed within the main body frame 38, and the main body frame 38 with the blower device 56 arranged thereon is inserted into the ceiling 3 from below.
1 through the opening 33 of the engagement protrusion 49.
The exhaust port 39 is positioned to match the connection port body 35 by engaging with the engagement recess 36 of the mounting plate 34, and then the mounting flange 50 is tightened to the entire edge 32 with wood screws (not shown). By attaching, the main body frame 38 is attached, and a decorative cover 57 is attached to the attached main body frame 38 to cover the opening 58 on the lower surface of the main body frame 38 and the opening 33 in the ceiling 31.

Now, in the case of the structure configured as described above, the part of the main body part 43 of the main body frame 38 that contacts the mounting plate 34 is the first side wall 40, and here the supplementary part 46
The first side wall 4
0 is flat and does not have a step like the conventional one, so it can be placed in close contact with the mounting plate 34, and therefore, air leakage can be prevented without requiring a seal like the conventional one. By making this unnecessary, manufacturing costs can be reduced. Also, in this case, the supplementary portion 4 formed on the opposite side and the upper side of the first side wall 40 of the main body portion 43 as described above.
6 are all joined from the inside of the joining flanges 47 and 48 of the main body part 43, and therefore it is difficult for the paint to pass through the paint folds after assembly, as shown by the arrows in Figure 4. Therefore, it is possible to create a beautiful finish without deteriorating the appearance. Further, in this case, the edge 46a of the peripheral portion of the supplementary portion 46 is not exposed at the outer corner portion of the main body frame 38, and therefore, there is no fear of injury due to the edge 46a. On the other hand, the supplementary portion 46 is attached to the fourth side wall 4
4 and the upper wall 45 are integrally provided,
Compared to the conventional structure having separate side plates and top plates, the number of parts can be reduced, and therefore manufacturing costs can also be reduced. Of course, in this case as well, the main body portion 43 is configured to have the first side wall 40, the second side wall 41, and the third side wall 42 excluding the fourth side wall 44 and the upper wall 45, so that The mold for cutting out and bending the blank from the blank can also be small, and the cost of the device can therefore be reduced. In addition, the engagement convex portion 49 formed on the joining flange 47 on the first side wall 40 of the main body portion 43 is designed to prevent gaps from forming when the side plate and the top plate are integrated, which was the conventional idea. Compared to the engagement convex portion formed in the above, it can be easily formed without requiring complicated and many steps, and therefore, it is also possible to achieve a reduction in manufacturing cost.

Here, FIG. 5 shows a different embodiment of the present invention, in which an opening 58 on the lower surface, which is the main intake port of the main body frame 38, is provided in the second side wall 41 in the main body part 43 of the main body frame 38. Next, an intake port 59 that is a second intake port is formed, and an engagement protrusion 60 that is a second engagement protrusion is formed on the joining flange 47 on the second side wall 41 where this intake port 59 is formed. The engaging convex portion 60 is engaged with the engaging recess 62 formed on the mounting plate 61 which is the second mounting plate. The second side wall 41 can be brought into close contact with the second side wall 41.
In addition, in this FIG. 5, 63 is the above-mentioned mounting plate 61.
A duct connection port body 64 provided on the mounting plate 61 is a mounting flange formed on the mounting plate 61.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but may be implemented with appropriate modifications within the scope of the invention.

[Effects of the invention] As is clear from the above description, according to the ceiling ventilation fan of the present invention, the structure of the main body frame can be made without deteriorating its appearance and without the risk of injury, making it possible to eliminate the need for seals. , and it is possible to reduce the number of parts without requiring a large mold or complicating or increasing the number of processes, and therefore has the excellent effect of achieving a sufficient cost reduction due to these factors. .

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is an exploded perspective view of the main body frame, Figure 2 is a vertical sectional view of the entire installed state, and Figure 3 is an exploded perspective view of the main body frame. FIG. 4 is an exploded perspective view of the main body frame and the mounting plate, FIG. 4 is a partial sectional view for explaining the operation, and FIG. 5 is a view corresponding to FIG. 3 showing a different embodiment of the present invention.
Also, FIGS. 6 to 10 show the conventional structure, where FIG. 6 is a diagram equivalent to FIG. 2, FIG. 7 is a diagram equivalent to FIG. 1, FIG. 8 is a diagram equivalent to FIG. 3, and FIG. 9 is a diagram equivalent to FIG. A view corresponding to FIG. 4 and FIG. 10 are longitudinal sectional side views of a structure in which the side plate and the top plate are integrated. In the figure, 34 is a mounting plate, 35 is a duct connection port,
36 is an engagement recess, 38 is a main body frame, 39 is an exhaust port,
40 is a first side wall, 41 is a second side wall, 42 is a third side wall, 43 is a main body portion, 44 is a fourth side wall, 4
5 is an upper wall, 46 is a supplementary part, 47 is a joining flange at each upper edge of the first to third side walls, 48 is a joining flange at each end edge of the second and third side walls, 49
5 is an engaging convex portion, 56 is a blower device, 59 is an intake port, and 6 is an engaging convex portion.
0 is an engagement protrusion, 61 is a mounting plate, 62 is an engagement recess,
63 indicates a duct connection port.

Claims (1)

[Scope of utility model registration request] A mounting plate equipped with a duct connection port body and having an engagement recess on the upper edge, and an engagement protrusion that is inserted into and engaged with the engagement recess, and has an exhaust port that communicates with the duct connection port body. The main body frame includes a first side wall having the exhaust port and in close contact with the mounting plate, and a second side wall extending on both sides of the first side wall. and a third side wall, and an inward joining flange is formed at each upper edge of the first, second and third side walls and at each end edge of the second and third side walls, respectively. The main body part has the engaging protrusion formed on the joining flange edge of the first side wall, a fourth side wall facing the first side wall, and an upper wall continuous above the fourth side wall. and the fourth side wall is attached to a joining flange at each upper edge of the first, second and third side walls. A ceiling ventilation fan characterized by comprising a supplementary part which is integrally connected to the main part.