JP2725568B2 - Ventilation fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation fan equipped with a shutter.

[0002]

2. Description of the Related Art FIG. 9 and FIG.
FIG. 1 is a view showing a conventional ventilation fan disclosed in Japanese Patent Publication No. 2408, in which 1 is a main body frame, which is attached to a blower made of metal in a cylindrical shape and having a blade (not shown) and an electric motor (not shown). Is mounted via. Reference numeral 2 denotes a shutter support member provided with a plurality of convex portions 3 made of synthetic resin.
A notch 4 is provided between protrusions 3 on the shutter side, which will be described later, so as not to hit the shutter.
Are fixed by screws 5 to both side walls of the outdoor opening.
Reference numeral 6 denotes a shutter, both ends of which are loosely fitted to the convex portion 3 and are provided so as to be freely opened and closed.

[0003] The conventional ventilation fan is configured as described above, and a blowing action is performed by operating the blower, and the shutter 6 opens with the convex portion 3 as a fulcrum by the wind pressure to perform ventilation.

[0004]

In the conventional ventilation fan as described above, the ambient temperature of the ventilation fan rises due to heat shrinkage after molding due to the molding of the shutter support member 2 made of synthetic resin, and in summer, etc. The notch 4 is provided to cope with the deformation caused by the difference in the coefficient of thermal expansion from the body frame 1 due to the above case, but it is not sufficient. Due to these deformations, there is a problem that the assemblability deteriorates, the operation of the shutter 6 deteriorates, the shutter 6 cannot be completely closed, the outside wind flows backward into the room, and rainwater enters.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the shutter support member is not deformed.
It is an object of the present invention to obtain a ventilation fan which is easy to assemble, has a stable ventilation performance, and is easy to use.

[0006]

A ventilating fan according to the present invention is provided with a main body frame formed in a cylindrical shape, a blower including an electric motor, blades and the like provided in the main body frame, and provided on a side wall of the main body frame. The sheet metal as a framework, formed by combining a molded product by molding on the sheet metal, a shutter support member having a plurality of convex portions made of a large amount of molded material, and rotatably loosely fitted to the convex portions, A shutter for opening and closing the opening of the main body frame is provided, and a connecting rod connecting the protrusions of the shutter support member with an inclination is substantially Z-shaped.

Further, a concave portion for forming a thin portion is provided near the convex portion of the shutter support member.

Further, a cut-and-raised portion provided inside the convex portion is provided on the sheet metal, and the cut-and-raised portion is located on the hole side after the cut-and-raised portion from the center of the convex portion. Is perforated.

[0009]

According to the present invention, since the shutter supporting member is formed of a sheet metal as a shaft, the shutter supporting member has a flatness, does not deform, is easily mounted on the main body frame, and the shutter operation is stabilized. Furthermore, since a Z-shaped shape is formed between the resin portions where a relatively large amount of resin such as a convex portion is used, even if both the resin portions shrink, the Z-shaped resin portion is pulled by both resins. There is no deformation in the part that functions as a ventilation fan, such as a convex, only by deformation.

Further, by making the portion of the resin having a small amount of resin on one side concave and thin, the amounts of the resin on the front side and the back side of the shutter support member become the same, and warping due to shrinkage of the resin after molding is eliminated. In addition, no gap is formed between the shutter and the shutter support member due to the concave shape.

Further, the resin for forming the convex portion covering the cut-and-raised portion flows much to the resin hole side and is absorbed by the resin hole, and the resin on the hole side after the cut-and-raised portion is reduced. No protrusions are deformed.

[0012]

1 to 8 show one embodiment of the present invention. In the drawings, reference numeral 10 denotes a house, and 11 denotes a wall 1 of the house.
2, a through-hole penetrating the inside and outside of the room, 13 is a mounting frame mounted in the through-hole, 14 is a ventilation fan, and an electric motor 16 held by mounting legs 15a in a main body frame 15 formed in a cylindrical shape. And a blower 18 comprising a blade 17 mounted on a rotary shaft 16a of the electric motor. Reference numeral 19 denotes a wall mounting screw for fixing the main body frame 15 to the mounting frame 13, and reference numeral 20 denotes an orifice, which is mounted on the front surface of the main body frame 15 so as to surround the blades 17.

Reference numeral 21 denotes a shutter portion, and 22 denotes a rotary plate constituting the shutter portion, which is made of a sheet metal material, has a cutout recess 23 on one side, and a long hole 24 on the other side, and a spring 25 above the long hole 24. There is provided a locking portion 26 to which one is locked.
Reference numeral 27 denotes an L-shaped plate, which is made of an L-shaped sheet metal material, is provided with a pin 29 which is inserted into the long hole 24 on the short side 28 and slides, and three projections 31 are provided at predetermined intervals on the long side 30. ing. 3
Reference numeral 2 denotes a shutter support member, and 33 denotes a sheet metal forming a frame of the shutter support member, which is cut and raised to form a convex portion (described later) for holding a shutter described later.
5 are provided. 36 is a hole after the notch formed with the cut-and-raised portion, and 37 is a resin hole formed through the cut-and-raised portion 35 facing the hole, and plays a role of adjusting the amount of shrinkage of the molding resin.

Reference numeral 38 denotes a screw hole provided in the sheet metal 33, which is used when the shutter support member 32 is fixed to the main body frame 15. An upper molding portion 39 is formed of molding resin so as to cover an upper portion of the shutter support member 32.
A projection 40 provided on the upper molded member covers the cut-and-raised portion 35. The cut-and-raised portion 35 is positioned on the hole 36 side from the center C of the convex portion within the convex portion by the dimension L shown in FIG. It is arranged to shift. Reference numeral 41 denotes an upper stopper hole, which is provided like the projection 40 so as to communicate with the screw hole 38. Reference numeral 42 denotes a connecting rod, and the shutter support member 32 is continuously provided in a substantially Z-shape with an inclination between the convex portions 40. A concave portion 43 forms a thin portion between the convex portion 40 and the stopper hole 41 near the convex portion 40. Reference numeral 44 denotes a lower forming part, which constitutes the lower part of the shutter support member 32,
9, a lower stop hole 45 communicating with the screw hole 38 and the upper stop hole 41 is formed.

Reference numeral 46 denotes a fulcrum pierced in the main body frame 15, and the notch recess 23 of the rotary plate 22 is engaged with the fulcrum. Reference numeral 47 denotes a shutter having projections 48 bent at both ends by a flat plate.
A first shutter hole 49 into which the projection 34 is inserted is provided at a lower portion of the projecting piece, and a second shutter hole 50 engaged with the projection 31 is provided at the upper portion. Reference numeral 51 denotes an interlock switch, which is electrically interlocked with the electric motor 16, and
At 2, the lever 53 moves up and down. 54 is a pull rod having one end connected to the lever 53 and the other end locked to the rotating plate 22; 55 is a power cord for supplying power to the interlock switch 51; 56 is fixed to the main frame 15 with the shutter support member 32; Screw, 57 is power outlet, 58 is blade 17
Are fixed to the electric motor 16.

In the ventilation fan constructed as described above, the shutter support member 32 is formed by using the sheet metal 33 as a frame as shown in FIGS.
Is formed by outsert molding. As a result, the convex portion 34 is formed by covering the cut-and-raised portion 35. In this case, the molding resin flows more toward the resin hole 37 with respect to the cut-and-raised portion 35, and is absorbed and adjusted by the resin hole 37, so that the cut-and-raised portion 35 is formed. The inclination to the side of the hole 36, which is weak in strength, is eliminated, and the deformation of the projection 34 is eliminated. Furthermore, in the concave portion 43 near the convex portion 34 with a large amount of resin, the amount of resin is the same in the upper molded portion 39 and the portion 59 in the lower molded portion 44 with a small amount of resin, and warpage due to shrinkage after molding is eliminated. . Also,
Even if the convex portion 40 with a large amount of resin is contracted by the connecting rod 42, only the Z-shaped resin portion is deformed, and the convex portion 40 with a large amount of resin is not deformed. As described above, the deformation after molding can be prevented in accordance with the prevention of deformation at the time of molding due to the use of the sheet metal 33 as a frame.

Next, as shown in FIG. 8, a pair of shutter support members 32 are fixed to both inner walls of the body frame 15 with screws 56. An L-shaped plate 27 is rotatably mounted on one inner wall of the main body frame 15 around one point as an axis (not shown).
The rotary plate 22 is mounted on the main body frame 15 by being engaged with the fulcrum 46 via the 7 pins 29. And the rotating plate 2
2 are already mounted and connected to the spring 25 and the pull rod 54 for urging the shutter 47 in the closing direction.

Next, the shutter 47 is mounted on the shutter support member 32 and the L-shaped plate 27, and the orifice 20 is attached to the main body frame 15 in which the blower 18 is provided, thereby assembling. Then, the ventilation fan 14 is inserted into the through hole 11 with the wall mounting screw 19.
And connect the power supply. Next, by pulling the drawstring 52, the lever 53 moves downward, and the rotary plate 22 rotates about the fulcrum 46. The rotation causes the pin 29 of the L-shaped plate 27 to move through the elongated hole 24 of the rotary plate 22. L to slide
The template 27 moves up and down. Further, the vertical movement of the L-shaped plate 27 causes the convex portion 40 of the shutter support member 32 to become
The shutter 47 is opened using the projection 31 of the template 27 as a power point. Further, the lever 53 is returned by pulling the pull cord 52 again, and the reverse operation when the shutter is opened is performed by the urging force of the spring 25, and the shutter 47 is closed.

[0019]

As described above, the present invention provides a main body frame formed in a cylindrical shape, an electric motor provided in the main body frame,
A blower including blades and the like, and a shutter support member provided on the side wall of the main body frame and formed by combining a sheet metal as a frame and a molded product formed by molding the sheet metal, and having a plurality of convex portions formed of a large amount of molding material. A shutter rotatably fitted to the protrusion, and a shutter for opening and closing the opening of the main body frame; and a connecting rod connecting the protrusion and the protrusion of the shutter support member with an inclination. The Z-shaped portion made of a connecting rod eliminates the deformation of the protruding portion where a large amount of resin is used, and the deformation of the shutter support member is eliminated. In addition, the assemblability becomes easy, and the manufacturing cost can be reduced. Further, the shutter operation is stabilized, and the quality is improved.

Further, by providing a concave portion for forming a thin portion near the convex portion of the shutter support member, the resin is absorbed in the concave portion, and the amount of resin on the front side and the back side of the shutter support member can be made uniform. There is no deformation of the support member.

Further, a cut-and-raised portion provided inside the convex portion is provided on the sheet metal, and the cut-and-raised portion is positioned on the hole side after the cut-and-raised portion from the center of the convex portion. By forming the holes, it is possible to adjust the flow rate of the cut and raised resin at the front and back surfaces during the molding, to absorb the resin, to eliminate the deformation of the convex portions after the molding, to stabilize the shutter operation, and to improve the quality.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention and showing wall mounting.

FIG. 2 is a mounting side view showing one embodiment of the present invention.

FIG. 3 is a front view showing an embodiment of the present invention, with an orifice removed.

4A and 4B show one embodiment of the present invention, in which A is a side sectional view when the shutter is closed, and B is a side sectional view when the shutter is opened.

FIG. 5 is an exploded perspective view of a shutter support member showing one embodiment of the present invention.

FIG. 6 shows an embodiment of the present invention, wherein A is a front view of a shutter support member, B is a cross-sectional view thereof, and C is a rear view thereof.

FIG. 7 shows an embodiment of the present invention and is an enlarged sectional view of a convex portion of a shutter support member.

FIG. 8 is a partial cross-sectional view showing one embodiment of the present invention and showing fixing of a shutter support member to a main body frame.

FIG. 9 is a perspective view showing a shutter support member of a conventional ventilation fan.

FIG. 10 is a partial sectional view showing a shutter of a conventional ventilation fan.

[Explanation of symbols]

 14 ventilation fan 15 body frame 16 motor 17 blade 18 blower 32 shutter support member 33 sheet metal 35 cut and raised 36 hole 37 resin hole 40 convex portion 42 connecting rod 43 concave portion 47 shutter

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masayuki Ando 3-40, Shimano, Tegano, Nakatsugawa City Mitsubishi Electric Engineering Co., Ltd. Nagoya Office Nakatsugawa Branch Office (72) Inventor Tomohiro Fukuyo Iida City, Nagano Prefecture 29-2 Kume 4 Shinryo Electric Co., Ltd. (72) Inventor Yasuhiko Usuda 29-9 Kume 4 Shinryo Electric Co., Ltd., Iida City, Nagano Prefecture

Claims (3)

(57) [Claims] 1. A main body frame formed in a cylindrical shape, a blower including a motor, a blade and the like provided in the main body frame, and a sheet metal provided on a side wall of the main body frame to form a frame, and formed on the sheet metal. A shutter support member having a plurality of convex portions formed of a large amount of molding material, and a shutter rotatably loosely fitted to the convex portions and opening and closing the opening of the main body frame. A ventilating fan, which is connected in a substantially Z-shape with a connecting rod connecting the convex portions of the shutter support member with an inclination. 2. The ventilation fan according to claim 1, wherein a concave portion forming a thin portion is provided near the convex portion of the shutter support member. 3. A cut-and-raised portion provided inside the convex portion in the sheet metal, and the cut-and-raised portion is positioned on the hole side after the cut-and-raised portion from the center of the convex portion, and is opposed to the hole through the cut-and-raised portion. The ventilation fan according to claim 1, wherein a ventilation fan is provided.