JPS6123233Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a shutter device installed in a ventilation opening through which air is exhausted through a duct in a ceiling-embedded ventilation fan, etc., and improves assembly efficiency and reduces abnormal noise when opening and closing the shutter plate. The purpose is to

Conventionally, a cylindrical duct mounting frame is attached to the ventilation opening of a ceiling-embedded ventilation fan, etc., and the mounting structure is such that the mounting flange of the mounting frame is fixed to the periphery of the ventilation opening with screws through an annular packing. Was.
A shutter plate that opens and closes under wind pressure is attached within the duct mounting frame. The shutter plate has been attached by hanging from a hanging piece cut and raised within the duct attachment frame, or by supporting a pivot in a bearing hole formed in the side of the attachment frame. Therefore, it takes time and effort to pivot the shutter plate. Further, a cut-and-raised restriction piece was provided protruding from the lower part of the mounting frame so that the shutter plate could only be opened and closed in one direction. Further, when the shutter plate is closed, it comes into contact with the cut-and-raised regulating piece and generates an abnormal noise, so a noise-reducing cushion is attached to the portion where the regulating piece comes into contact with the shutter plate. As a result, a separate sound deadening cushion was required, which required time and effort to assemble, and the number of parts increased.

In view of the above points, the present invention has a structure in which a gasket is interposed between the peripheral edge of the ventilation opening of the equipment frame and the mounting collar of the duct mounting frame, and at the same time, both ends of the shaft of the shutter that opens and closes the ventilation opening are sandwiched. The present invention provides a shutter device which solves the conventional drawbacks by forming an abutting part on the inner edge of the packing with which the lower part of the shutter comes into contact when the shutter is closed.

The present invention will be explained below based on the embodiments shown in the drawings.

Reference numeral 1 denotes a ceiling-embedded ventilation fan main body equipped with a fan motor (not shown), etc., and the main body 1 is attached to an opening formed in a ceiling 2 using means such as screws. A ventilation opening 3 is formed in the side wall of the main body 1. A duct mounting frame 5 for mounting a duct 4 is attached to the ventilation opening 3. The mounting frame 5 includes a tapered cylindrical portion 6 into which the duct 4 is fitted, and a mounting flange 7 stretched over the large diameter end of the cylindrical portion 6. A recessed groove 10 is formed in a portion of the surface of the collar portion 7 facing the main body 1 facing the opening of the cylinder portion 6 to form a bearing portion for pivotally supporting both ends of the pivot shaft 9 of the shutter plate 8. are doing. The pivot shaft 9 is attached by being inserted into arcuate grooves 11 and 12 continuously formed on the front and back sides of the shutter plate 8. Reference numeral 13 denotes an annular packing made of felt or elastic rubber, which is interposed between the mounting collar 7 and the circumference of the ventilation opening 3 when the duct mounting frame 5 is attached, and is inserted into the insertion hole 14 of the collar 7. By tightening the screw 15 screwed into the main body 1, the flange 7 and the ventilation opening 3 are sealed. Simultaneously with the installation of the mounting frame 5, the shaft 9 of the shutter plate 8 is pivotally supported in a bearing portion formed between the groove 10 and the packing 13 so as to be openable and closable. An abutment 16 is formed at the lower inner edge of the packing 13, with which the shutter plate 8 abuts. Therefore, by abutting the abutting portion 16 when the shutter plate 8 is closed, the opening/closing direction is restricted to one direction, and abnormal noises can be prevented when the shutter plate 8 is closed.

As described above, in the present invention, a gasket is interposed between the peripheral edge of the ventilation opening of the equipment body and the mounting collar of the duct mounting frame, and at the same time, both ends of the shaft of the shutter that opens and closes the ventilation opening are clamped and supported, A contact part is formed on the inner edge of the seal, with which the lower part of the shutter comes into contact when closed, and has great practical effects, such as reducing the number of parts and allowing all parts to be assembled at the same time, improving work efficiency. be.

[Brief explanation of the drawing]

FIG. 1 is a sectional view with the internal mechanism of a ventilation fan having the shutter device of the present invention omitted, FIG. 2 is an exploded sectional view of the main part, and FIG. 3 is an exploded perspective view of the main part. 3...Ventilation opening, 5...Duct mounting frame, 7...
Mounting flange, 8... Shutter plate, 9... Pivot, 13
...Patsukin, 16...This department.

Claims (1)

[Scope of utility model registration request] A gasket is interposed between the peripheral edge of the ventilation opening of the equipment frame and the mounting collar of the duct mounting frame, and at the same time, both ends of the shaft of a shutter plate that opens and closes the ventilation opening are clamped and pivotally supported, and the gasket is pivotally supported. A shutter device comprising a contact part formed on the inner edge of the shutter plate, with which the lower part of the shutter plate comes into contact when the shutter plate is closed.