JPH02247438A - Shutter device for exhaust duct - Google Patents

Abstract

PURPOSE:To eliminate bad influence caused by water droplets to smoothly perform the open operation of a shutter plate so as to make a closing sound silent by integrally forming the device so that a stopper comes to a linear touch or a point touch with the shutter plate at the lower part of a shutter support while allowing a rapping hole for its formation to communicate with the inside and outside of a support frame. CONSTITUTION:A shutter frame 15 is formed so that a rectangular shutter frame part 18 for communicating with an inserted cylinder part 16 can be projected outdoors. A stopper 22 for stopping a lower blocking shutter plate 19 at a closed position is integrally formed at two places of both sides of a lower side part of the shutter frame part 18, and a part abutting to the shutter plate 19 is shaped in the form of a triangular rib to keep a linear touch. In each stopper 22, stopper rapping holes 23 are formed from the rear side thereof to become weep holes. Thereby, the adherence of the shutter plate 19 caused by water droplets adhering between the shutter plate 19 and the stopper 22 is made minimum and the open operation of the shutter plate 19 can be smoothly and silently performed while the water droplets produced by dewing and the like in the support frame 15 can be drained through rapping holes 23 outside.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is directed to a device equipped with a shutter plate for opening and closing the outlet portion of an exhaust duct from the outdoor side. The present invention relates to a shutter device for an exhaust duct with an improved structure related to holes.

(Conventional technology) Conventional exhaust duct! - In the Nyatta device, as shown in FIG. 3, a cylindrical insertion cylinder part 2 is formed in a rectangular shutter support frame 1, and this insertion cylinder part 2 is used as an exhaust duct!・(
(not shown). A rectangular shutter frame 3 is formed on the shutter support frame 1 so as to protrude toward the outdoors in correspondence with the insertion tube 2, and two shutter plates 4, for example, are attached to this shutter frame 3. It is rotatably supported around a support 5 protruding from both ends of the upper part. In this case, during ventilation operation, each shutter plate 4 is opened to the state shown in Fig. 3 due to wind pressure, and when operation is stopped, each shutter plate 4 hangs down and closes the outlet of the exhaust duct, allowing backflow of outside air. prevent. At this time of closing, the lower end of the upper shutter plate 4 is in contact with the upper end of the lower shutter plate 4, and the upper end of the lower shutter number 4 is in contact with the lower end surface 1a of the shutter support frame 1.

(Problems to be Solved by the Invention) In the above-mentioned conventional configuration, the lower end surface 1a of the shutter support frame 1 functions as a stopper for moving the shutter plate 4 to the closed position. It comes into surface contact with the lower end surface 1a of the support frame 1. Therefore, if there is water such as dew condensation water on the lower end surface 1a, the water droplets will act to bring the shutter plate 4 and the lower end surface 1a into close contact with each other when the shutter plate 4 is closed, and the shutter plate 4 will open. inhibit sex. Moreover, shutter plate 4 and shutter support #! Since the contact area with the edge surface 1a of the frame 1 is large, when the shutter plate 4 comes into contact with the lower end surface 1a during closing, a loud "bash" sound is generated, which also has the disadvantage of becoming a source of noise. Ta.

The present invention has been made in consideration of these circumstances, and its purpose is to prevent water droplets from impairing the opening operation of the shutter plate, to reduce the closing sound of the shutter plate, and to reduce the shutter plate's closing noise. To provide a shutter device for a sight-seeing duct which can also improve drainage performance within an ivy support frame.

[Structure of the Invention] (Means for Solving the Problems) The exhaust duct shutter device of the present invention includes an exhaust duct whose outlet portion is fitted into a through hole formed in a chamber wall, and an outlet portion of the exhaust duct. In the exhaust duct shutter device, the exhaust duct includes a shutter support frame made of synthetic resin attached to the shutter support frame, and a shutter plate supported by the shutter support frame so as to rotate r+l so as to open and close the outlet portion. A stopper for regulating the rotation of the shutter plate is integrally molded in the corner of the support frame so as to be in line contact or point contact with the shutter plate, and a die-cut hole for forming the stopper is formed in the shutter support frame. By connecting the inside and outside of the mold, the punching hole can be used as a drainage hole.

(Function) A stopper formed at the bottom of the shutter support frame restricts the rotation of the shutter plate, and since the shape of the stopper is shaped to make line contact or point contact with the shutter plate, the shutter The contact area between the plate and the stopper can be made extremely small. Therefore, even if there are water droplets attached to the stopper, the contacting effect of the shutter plate due to the surface tension of the water droplets can be minimized, and the opening operation of the shutter plate can be performed smoothly. . Historically, since the contact area between the shutter plate and the stopper is extremely small, the sound produced when the shutter plate contacts the stopper during closing can be reduced, and the closing sound of the shutter plate can be made quieter. Furthermore, in this case, by communicating the die-cut hole for forming the stopper with the inside and outside of the shutter support frame, the die-cut hole can be used as a drain hole, so a separate drain hole is formed. It is possible to improve the drainage performance even without molding, and compared to, for example, molding the stopper and drain hole separately, the mold structure can be made into a cylinder, which reduces the molding cost.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

First, in FIG. 2 showing the installation state, reference numeral 11 is an annular exhaust duct installed in the ceiling of the room, one end of which is connected to the exhaust port of a ceiling fan (not shown), and the other end is an outlet. 12 is fitted into a through hole 14 formed in the chamber wall 13. On the other hand, reference numeral 15 denotes a synthetic resin shutter support frame having a rectangular outer shape, for example, and in the center thereof,
An insertion cylinder part 16 having a diameter slightly smaller than the inner diameter of the υ1 air duct 11 is formed toward the back side (IA: air duct 11 side), and a plurality of locking springs 17 are attached at equal intervals to the periphery of the tip of this insertion cylinder part 16. It is being Then, the insertion cylinder portion 16 is inserted into the exhaust duct 11 from the outdoor side, and in this state, the third IL spring 17 is held in pressure contact with the inner surface of the exhaust duct 11. Further, the shutter support frame 15 includes a first
As shown in the figure, a rectangular shutter frame 18 that communicates with the insertion tube 16 is formed to protrude outdoors, and this shutter frame 18 is provided with, for example, two wind pressure open type shutter plates 19. ing. In this case, shutter! i219
is formed into a rectangular plate shape made of, for example, synthetic resin, and has shaft portions 20 integrally formed on both sides of its upper end.

Correspondingly, on both left and right sides of the shutter frame 18,
A shaft support hole 21 is formed, and the shutter plate 1 is inserted into this shaft support hole 21.
By inserting the shaft portion 20 of No. 9, one shutter plate is rotatably supported about the shaft portion 20 at the top thereof as a fulcrum.

Thus, 22 moves the lower shutter plate 19 to the closed position 11.
．． This stopper 22 is integrally molded at two locations on both sides of the lower side of the shutter frame 18. The portion of each stopper 22 that contacts the shutter plate 19 is formed into a triangular rib shape, so that each stopper 22 and the shutter plate 19 are in line contact. A punching hole 23 (see FIG. 2) is formed in each stopper 22 from the back side (chamber wall 13 side).
3 are exposed (opened) on both left and right side surfaces of the stopper 22. As a result, the upper side of the shutter frame 18 is communicated with the outside through the die-cut hole 23, and the die-cut hole 23 is used as a water drain hole.

On the other hand, for example, two cushion members 24 are attached to the back side of the lower end of each shutter plate 4, and when closed, the cushion members 24 of the upper shutter plate 19 are connected to the lower shutter plate 19.
9, and the cushion member 24 of the lower shutter plate 19 is brought into contact with the stopper 22.

Incidentally, numeral 25 denotes a weather cover which is layered to cover the entire shutter support frame 15.

Next, last month 1 with the above configuration will be explained. When the ventilation operation is started, each shutter plate 19 receives wind pressure and rotates from the closed position shown in FIG. 2 to the open position shown in FIG. 1. In this case, the shape of the tip of the stopper 22 is different from that of the shutter plate 1.
Since the shutter plate 19 is formed into a triangular rib shape so as to be in line contact with the stopper 9, the contact area between the shutter plate 19 and the stopper 22 is extremely small. Therefore, even if water droplets are attached between the shutter plate 19 and the stopper 22 before opening (when closed), the tightening effect on the shutter plate 19 due to the surface tension of the water droplets can be minimized. As a result, the opening operation of the shutter plate 19 can be performed smoothly.

On the other hand, when the ventilation operation is stopped, one shutter plate rotates to the closed position due to its own weight. At this time of closing, one shutter plate collides with the stopper 22, but as mentioned above, the contact area between the shutter plate 19 and the stopper 22 is extremely small, so the closing sound of the shutter plate 19 is reduced. . In particular, since the shutter plate 19 in this embodiment has a white cushion member 24 in the area where it contacts the stopper 22, the cushioning effect of the cushion member 24 has the advantage of further reducing the collision noise of the shutter plate 19. . In addition, in the scope of the utility model registration request, “
"Shutter plate" is a concept that includes this cushion member 24, and contacting the cushion member 24 is also referred to as "contacting the shutter plate" in terms of the interpretation of the claims for utility model registration.
It means that.

Further, by communicating the die-cut hole 23 for molding the stopper 22 with the inside and outside of the lower side of the shutter frame 18, the die-cut hole 23 can be used as a water drain hole, so that the shutter can be supported. Water droplets generated due to dew condensation etc. in the frame 15 are removed from the die cut hole 2 as shown by arrow 1]JA in Figure 2.
3 (drain hole) allows you to make a dry mountain outside. Therefore, drainage performance can be improved without separately molding a drain hole, and compared to, for example, molding a stopper and a drain hole separately, the structure of the mold can be simplified and molded. Costs can be reduced.

In the above embodiment, the shutter plate 19 is provided with a cushion portion (424), but the intended purpose of the present invention can be achieved even with a configuration in which one cushion member is omitted.

Further, in the above embodiment, the stopper 22 is formed so as to be in line contact with one shutter plate, but it may be formed so as to be in point contact.

In addition, the present invention can be modified in various ways, such as by changing the number of stoppers and the number of shutter plates, or by changing the pivot structure of the shutter plate.

[Efficacy of invention! ,! ] As is clear from the above description, the present invention includes integrally molding a stopper for regulating the rotation of the shutter plate at the lower part of the shutter support frame so as to make line contact or point contact with the shutter plate, and By communicating the die-cut hole for molding with the inside and outside of the shutter support frame, the die-cut hole can be used as a water drain hole, so the contact area between the shutter plate and the stopper can be made extremely small. Therefore, it is possible to eliminate the adverse effects of water droplets and to smoothly open the shutter plate, and also to reduce the sound of closing the shutter plate. Moreover, by communicating the die-cut hole for forming the stopper with the inside and outside of the shutter support frame, the die-cut hole can be used as a drain hole, so there is no need to separately form a drain hole. Drainage performance can be improved, and the structure of the mold can be simplified compared to, for example, when a stopper and a drain hole are molded separately, and molding costs can be reduced.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention,
FIG. 1 is an exploded perspective view, FIG. 2 is a vertical sectional side view showing the installed state, and FIG. 3 is a perspective view of a conventional Nyatta support frame. In the drawing, 11 is an exhaust duct, 13 is a chamber wall, 14 is a through hole, 15 is a shutter support frame, 16 is an insertion tube, 18 is a shutter frame, 1 is a shutter plate, 20 is a shaft, and 22 is a stopper. 23 is a die hole (water drain hole), and 24 is a cushion member.

Claims (1)

[Claims] 1. An exhaust duct with an outlet inserted into a through hole formed in a chamber wall, a synthetic resin shutter support frame attached to the outlet of the exhaust duct, and a shutter support frame made of synthetic resin with the outlet inserted into the shutter support frame. In an exhaust duct shutter device comprising a shutter plate that is rotatably supported so as to open and close, a stopper that restricts rotation of the shutter plate is provided at the bottom of the shutter support frame in line with the shutter plate. The shutter support frame is molded integrally so as to be in contact or point contact, and the punched hole for the molding is communicated with the inside and outside of the shutter support frame, so that the punched hole can be used as a drain hole. A shutter device for an exhaust duct characterized by: