JPS596186Y2 - ventilation fan - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a ventilation fan in which a decorative frame is fitted and locked to a flange portion of an opening on the indoor side of an outer frame.

Conventionally, in ventilation fans, a flange part is formed by bending the four sides of the opening on the indoor side of a rectangular outer frame in which a blower is installed inside, and forming a flange part on the four sides of the opening on the indoor side of the rectangular outer frame in which a blower is installed. A rectangular decorative frame with a ventilation opening is fitted and locked so as to cover the opening on the interior side of the room. The decorative frame is fitted and locked onto the flange part of the part.

In this case, when the decorative frame is fitted to the flange of the outer frame, the tip of the decorative frame comes into contact with the room wall surface before the two are locked, making it impossible to lock the decorative frame to the flange. In order to prevent this from happening, the tip of the cosmetic is set so that there is always a predetermined gap between it and the chamber wall surface.

However, in the above-mentioned conventional structure, the corner between the mutual ends of the flange part is cut off because the flange part is shaped by bending the four sides of the opening on the indoor side of the outer frame outward. As a result, when the decorative frame is fitted and locked to the flange part, a gap is formed at the corner of the flange part that communicates the inside and outside of the decorative frame, and the ventilation operation by exhaust air is performed by the blower. When this is done, the dirty air in the room is not only sucked into the outer frame from the ventilation opening of the decorative frame, but also from the gap, and the room wall surface corresponding to the gap becomes There was a problem with the suctioned air being contaminated by oil smoke, dust, etc.

The present invention was developed in view of the above circumstances, and its purpose is to provide a blocking member at one of the corners of the decorative frame and the flange portion of the outer frame that engages and locks the decorative frame. To provide a ventilation fan which can prevent air from being taken in from a corner part of a flange part and does not stain a room wall surface, etc. corresponding to the corner part of a flange part, by having one part in contact with the other part. It is in.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Reference numeral 1 denotes a rectangular outer frame, and flange portions 2 are formed by bending the outer frame outward on the upper, lower, left and right sides of the opening on the side A of the room. The distal end of 2 is bent so as to face the indoor A side, and a locking protrusion 2a extending in the longitudinal direction is formed at the distal end.

Further, for example, three shirt flaps 3 are pivotally installed at the opening on the outdoor B side of the outer frame 1 to open and close the opening, and a connecting lever 4 is connected to these shirt flaps 3.

Reference numeral 5 denotes a support column arranged vertically in the outer frame 1, and a blower device 8 consisting of a drive motor 6 and a blower blade 7 is attached to this support column, and the blower blade 7 is located on the indoor A side. It is now located in

Reference numeral 9 denotes a switch device attached to the lower flange portion 2 of the outer frame 1. A drawstring 10 is led out from the lower surface of the switch device 9, and a connecting piece 11 is protruded from the upper surface. It is connected to the lower end of the lever 4.

When the pull cord 10 is pulled, the switch device 9 energizes the drive motor 6 and lowers the connecting piece 11, thereby opening the shirt shutter 3 via the connecting lever 4. There is also a drawstring 1
When the lever 0 is pulled again, the drive motor 6 is cut off, the connecting piece 11 is raised again, and the shutter 3 is thereby opened.

Reference numeral 12 denotes a rectangular decorative frame made of plastic, and a substantially rectangular cylindrical ventilation opening 13 is integrally formed in this frame so as to be oriented toward the outside B direction.

Furthermore, a locking protrusion 12 a corresponding to the locking protrusion 2 a of the flange portion 2 is integrally formed on the inner surface of the tip end of the decorative frame 12 facing in the outdoor B direction.

Furthermore, on the inner surfaces of the four corners 12b of the decorative frame 12,
A rib 14, which is a blocking member and has a substantially L-shape, corresponds to the four corner parts of the flange part 2 of the outer frame 1, that is, the ends 2b, 2b of the two adjacent flange parts 2, 2, is provided outdoors. It is integrally shaped so as to protrude toward the B side.

Next, a case will be described in which the above-mentioned ventilation fan is attached to the attachment opening 17 of the attachment frame 16 fitted and attached to the room wall 15.

First, insert and fit the outer frame 1 into the mounting opening 17 from the indoor A side, and then screw the screws 18 screwed into the upper plate of the outer frame 1 into the mounting frame 16.
The decorative frame 12 is fitted into the flange portion 2, and the locking projection 12a is locked with the locking projection 2a.

In this way, when the decorative frame 12 is fitted and locked to the flange portion 2 of the outer frame 1, the ventilation opening portion 13 surrounds the ventilation blades 7, and the tip of the decorative frame 12 is connected to the interior A of the room wall 15.
A predetermined gap 1 exists between the side surfaces, and the end surfaces of the ribs 14 abut against the ends 2b, 2b of the flange portions 2, 2, which are the corner portions of the flange portion 3, which are adjacent to each other.

When the drawstring 10 is pulled, the shirt shutter 3 is opened and the drive motor 6 is energized to rotate the ventilation blades 7, and the dirty air from the indoor A side is sucked out of the ventilation opening of the decorative frame 12. The air is sucked into the outer frame 1 from the section 13 and discharged from the opening on the outside B side of the outer frame 1, thereby performing a ventilation operation by exhausting air.

In this case, the rib 1 formed on the corner 12b of the decorative frame 12
4 is in contact with the corner ends 2b, 2b of the flange portion 2 of the outer frame 1, so unlike the conventional case, a gap portion is formed at the corner portion of the flange portion 2 to communicate the inside and outside of the decorative frame 12. Therefore, during ventilation operation, air is sucked in from the gap and the surfaces of the room A side such as the room wall 15 and the mounting frame 16 are contaminated with oil smoke, dust, etc. contained in the sucked air. There are no problems at all.

After that, when the pull cord 10 is pulled again, the drive motor 6
The power is cut off and the shutter 3 is closed, thereby stopping the ventilation operation.

In the above embodiment, a rib 14 is provided on the corner 12b of the decorative frame 12 and one of the corners of the seven lunge portions 2 of the outer frame 1, and this rib 14 is used as the other corner. Although the end portions 2b, 2b of the flange portions 2, 2 are brought into contact with each other, the present invention is not limited thereto; for example, as in another embodiment of the present invention shown in FIG. A substantially L-shaped rib 19 serving as a sheathing member is attached to 2b, 2b by spot welding or the like, and when the decorative frame 12 is fitted and locked to the flange portion 2, both ribs 14 and 19 are overlapped, so that the respective flanges are attached. It may be arranged so as to come into contact with the portion 2 and the decorative frame 12.

With such a structure, air intake from the corner portions of the flange portions 2 can be more reliably prevented. A sufficient effect can be obtained by simply providing the ribs 19.

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

The present invention, as described above, can prevent air from being taken in from the corner portion of the flange portion at the opening on the indoor side of the outer frame, and therefore prevents contamination of the room wall surface, etc. corresponding to the corner portion of the flange portion. It is possible to provide a ventilation fan that has the practical effect of being free of heat.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a longitudinal side view, Figure 2 being a front view of the outer frame, Figure 3 being a back view of the decorative frame, and Figure 4 being a rear view of the decorative frame. FIG. 2 is a perspective view of main parts showing another embodiment of the present invention. In the drawing, 1 is an outer frame, 2 is a flange part, 2a is a locking protrusion,
2b is an end (corner), 8 is a blower, 12 is a decorative frame, 1
2 a indicates a locking protrusion, 12 b a corner, 14 a rib (shielding member), 15 a chamber wall, and 19 a rib (shielding member).

Claims (2)

[Scope of utility model registration request] 1. A rectangular outer frame, a flange formed by bending the four sides of the opening on the indoor side of the outer frame outward, and a decoration that is fitted and locked to these flange parts. A ventilation fan comprising a frame, and a blocking member that projects from one corner of the decorative frame and the corner of the flange and abuts the other. 2. A utility model characterized in that the cover member protrudes from both the corner of the decorative frame and the corner of the flange so as to come into contact with the corner of the flange and the corner of the decorative frame, respectively. A ventilation fan according to claim 1.