JPH02302541A - Shutter for ventilation - Google Patents

Abstract

PURPOSE:To prevent sound due to vibrations of a plurality of shutter plates by an inexpensive means, by providing an air-direction guiding plate one end of which faces the upper end part of the uppermost shutter plate with a slight gap left therefrom at the time when the shutter plates are opened, and the other end of which is positioned at the upper end of an indoor-side opening of a frame body at that time. CONSTITUTION:An air-direction guiding plate 5 one end of which faces the upper end part of the uppermost shutter plate 2A with a slight gap D left therefrom, the other end of which is positioned at the upper end of an indoor-side opening of a frame body 1 and which guides air onto the lower surface side of the shutter plate 2A, not making it flow onto the upper surface side thereof, in a state wherein a plurality of shutter plates 2 are opened, is fixed to the frame body 1. Since the air flowing when the shutter plates 2 are opened is made not to pass the upper surface side of the uppermost shutter 2A, but to past the lower surface side thereof entirely by the air-direction guiding plate 5, no pressure difference occurs between the upper surface side and the lower surface side of the uppermost shutter 2A and, therefore, it is possible to prevent the occurrence of clatter sound easily and inexpensively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a ventilation shutter used by being attached to a ventilation opening in factories, warehouses, commercial kitchens, general homes, etc.

BACKGROUND OF THE INVENTION Conventionally, this type of ventilation shutter has generally been constructed as shown in FIGS. 4 to 6. That is, a plurality of shutter plates 1 for opening and closing the outdoor opening are inserted into the frame 101 and fixed from the indoor side 10B into the opening of the wall surface 107.
02 is rotatably supported by two shutter support plates 103 fixed within both sides of the frame 101, and one end of each of the plurality of shutter plates 102 is movably connected by a connecting rod 104. are doing.

The ventilation shutter in the above configuration is used in combination with a ventilation fan, etc., and the wind pressure of the ventilation fan causes a plurality of shutter plates 10 to
2 was opened to communicate between the indoor side 108 and the outdoor side 109, the ventilation fan was stopped, and the shutter plate 102 shut off the indoor side 111os and the outdoor side 109.

Problems to be Solved by the Invention In such a conventional configuration, wind pressure from ventilation fans, etc.
When a plurality of shutter plates 102 are opened, the frame body 10
Since the gap B between the upper end of the outdoor opening of No. 1 and the uppermost shutter plate 102A of the plurality of shutter plates 1o2 and the gap C between the shutters are different, a difference occurs in the wind speed passing through the shutters. Therefore, a pressure difference occurs between the upper and lower surfaces of the uppermost shutter plate 102A, causing the uppermost shutter plate 102A to vibrate and generate a chattering sound. In contrast, conventional solutions have increased the thickness of the plurality of shutter plates 102 to increase their strength and prevent chattering noise caused by vibration. In addition, the strength of the shutters has been increased by folding back both longitudinal ends of a plurality of shutters to increase their strength, or by providing extended reinforcing ribs. However, with such a solution, the thickness of all of the plurality of shutter plates 102 must be increased, leading to a rise in price. Further, the means for folding back both ends of the shutter and the means for providing a reinforcing lip must be applied to all the shutter plates 102, leading to a rise in price.

The present invention is intended to solve such problems, and aims to prevent chattering noise caused by vibration of the shutter plate using an inexpensive method.

Means for Solving the Problem In order to solve this problem, the present invention provides that when a plurality of shutter plates are opened, one end thereof faces the upper end of the uppermost shutter plate with a slight gap, and the other A wind direction guide plate is provided whose end is located at the upper end of the indoor opening of the frame.

With this configuration, the air discharged from the ventilation fan, etc. is guided by the wind direction guide plate and flows between the bottom surface of the shutter plate near the top, and between the top of the outdoor opening of the frame and the top of the shutter plate. It does not flow into the gap between the shutter plate and the uppermost shutter plate, so there is no pressure difference between the upper and lower surfaces of the uppermost shutter plate.
The rattling sound of the sha'/evening board is no longer generated.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 to 3. In the figure, a plurality of shutter plates 2 for opening and closing the outdoor opening are inserted and fixed into a frame 1 inserted into an opening of a wall surface 7 from the indoor side 8, and two shutter plates 2 fixed inside both sides of the frame 1 are installed.
It is rotatably supported on a book shutter support plate 3, and a connecting rod 4 is movably connected to one end of each so that the plurality of shutter plates 2 can operate in conjunction with each other. When the plurality of shutter plates 2 are open, one end thereof faces the upper end of the uppermost shutter plate 2B with a slight gap, and the other end faces the indoor opening of the frame 1. A wind direction guide plate 6 is fixed to the frame 1, which is located at the upper end and guides the wind toward the lower surface of the shutter plate 2B instead of flowing toward the upper surface.

In the above configuration, a plurality of shutter plates 2 are opened by wind pressure from a ventilation fan, etc., but the air flowing at that time does not pass through the upper surface side of the uppermost shutter 2B due to the wind direction guide plate 6, but all passes through the lower surface side. do. Therefore, no pressure difference occurs between the upper surface side and the lower surface side of the uppermost shutter 2B, and it becomes possible to easily and inexpensively prevent the thumping sound of the shutter plate 2B. Although this embodiment has been described using a wind pressure shutter, the same effect can be obtained with an electric shank that is opened and closed by a gear motor or the like.

Effects of the Invention As is clear from the description of the embodiment above, the present invention has the following advantages: increasing the thickness of a plurality of shutter plates, folding back both ends of the shutter in the longitudinal direction, and providing appropriate lips. It is possible to obtain the effect that the rattling sound of the shutter plate can be prevented by an inexpensive method without implementing such an expensive method.

[Brief explanation of drawings]

FIG. 1 shows Oi! of an embodiment of the present invention. The front view of the Qiyou Shack, and Figures 2 and 3 are cross-sectional views when the Qiyou Shack is installed. Figure 2 is when the shutter plate is closed, Figure 3 is when the Nyanota plate is open, and Figure 4 is A front view of a conventional ventilation fan shutter, and FIGS. 5 and 6 are cross-sectional views when the ventilation shutter is installed. FIG. 5 shows the shutter plate when it is closed, and FIG. 6 shows it when the shutter plate is open. 1...Frame body, 2...Shutter plate, 3...
...Shutter support plate, 4...Connection rod, 6...
...Wind direction guide board. Name of agent: Patent attorney Shigetaka Awano and 1 other person 1st
Figure 1 - Rod 2 - 11 Shi τ ivy bottom antagonal toshima 7ri i 藺 J and 4 - series of stuttering 1 5 - one kite curved dormitory J anti figure 2 figure 3 figure 4 f04 f02A 5th Figure 6

Claims (1)

[Claims] A plurality of shutter plates for opening and closing an outdoor opening of a frame body having a flange portion fixed to an opening in a wall surface are rotated by two shutter support plates provided on both sides inside the frame body. one end of each of the plurality of shutter plates is movably connected by a connecting rod, and when the plurality of shutter plates are opened, one end is slightly connected to the upper end of the uppermost shutter plate. A ventilation shutter comprising wind direction guide plates facing each other with a gap and having the other end located at the upper end of the indoor opening of the frame.