JP2005043003A - Air trunk opening and closing device for ventilation hood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air trunk opening and closing device for a compact ventilation hood capable of being used in a limited space without impairing the appearance in a case when it is mounted on a wall face. <P>SOLUTION: Two sheets of semicircular shutters are mounted in the air trunk of the ventilation hood, and two sheets of shutters are respectively provided with rotating shafts to be opened and closed, whereby a structure to surely open and close the air trunk when the ventilation hood is mounted on the wall face while reducing the projection to an outdoor side, can be constituted. By applying the semicircular shutters dividing the inside of the cylindrical air trunk of a ventilating hole into two by vertical faces to the air trunk, a dimension from a shutter shaft to a tip of the shutter can be reduced to the half of a conventional one. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air passage opening and closing device for a ventilation hood having a shutter structure that discharges room air to the outside using an opening of a ventilation hood provided on a wall surface of a building.

  As shown in FIG. 1, the conventional air path opening / closing device rotates in the vertical plane of the cylindrical body to reduce the opening area of the outdoor opening 4 as shown in FIG. There is a shutter provided with a variable opening / closing member 12 in a freely suspended state.

Japanese Laid-Open Patent Publication No. 2003-42527 (Fig. 1)

  In a conventional (JP-A-2003-42527) ventilation outdoor hood, an opening / closing member 12 whose upper end is rotatably held on the ventilation line of the mounting cylinder 3 shown in FIG. Opening and closing the opening. In the shutter 12 provided in such a free-hanging state, the dimension from the rotation fulcrum shaft of the shutter to the tip of the shutter becomes large when opened, and the distance between the cover 6 and the wall 1 is limited. When using, the opening of the shutter is insufficient and the ventilation rate is not satisfactory. In addition, there is a problem that the apparatus becomes large.

In addition, as another conventional example, the shutter is divided into two parts in the upper and lower directions, and the shutter is freely suspended from above. However, since the cross section of the air passage is circular, the structure is complicated and reliable. It was difficult to close the air path.

Also, when the shutter is made of metal only, it is inconvenient to use such as when the shutter vibrates due to outside wind, abnormal noise such as rubbing noise or vibration noise is generated and the noise in the building increases. It was.

  When the shutter of the conventional example is used for a long time, the rotating shaft and fulcrum are constructed at a place different from the air path, and the shutter is horizontal when opened, so dust, oil, tobacco oil Since the state of adhering etc. is kept for a long time, it may cause malfunction of the shutter

  The shutter opening and closing device according to the present invention is provided with two semicircular shutters that match the shape of a semicircular air passage that is divided into two in the vertical direction inside the cylindrical air passage of the ventilation opening, and the rotation of the shutter. A fulcrum is formed at the center in the vertical direction in the air path, and the shutter is opened and closed in a state where the shutter is always in the air path. The device is downsized at a distance.

Further, in the shutter rotating section, the shutter rotating shaft is provided in the direction perpendicular to the air path direction, and the rotating shaft is provided for both of the two shutters so that the same load is applied to the shutter during opening and closing. By doing so, it is possible to smoothly open and close the two shutters.

Further, in the shutter, in order to securely close the two shutters, the shutter upper fulcrum is shifted from the lower fulcrum to the indoor side when the upper side of the rotation fulcrum shaft is viewed from the side surface of the air passage. The center of gravity is configured to generate a moment that rotates in the direction in which the shutter closes with respect to the rotation axis.

Further, in the shutter, a tongue is formed on the opposite side of the support shaft of the shutter, and the tongue is overlapped with the support shaft of another shutter so as to keep secret when the shutter is closed. By making the material soft synthetic resin, it eliminates abnormal sounds such as metal rubbing noise and vibration noise.

Further, in the shutter structure, a tongue portion is formed so as to overlap the other shutter side from the semicircular shutter shaft core (string), and when the shutter is closed, the gap between the shutter matching portions is prevented and two sheets are prevented. The tongue and the shutter support each other when the shutter is closed, and the air passage is closed at a predetermined closed position so that the shutter is prevented from malfunctioning.

Further, in the shutter structure, the lower axis serving as a fulcrum of the shutter is supported by a shutter holding portion having a sharp tip at the inner spherical surface of the concave portion provided in the center, and the upper side is rotated by a hole of the shutter holding portion. By inserting the shaft core and supporting it on the outer periphery of the shaft, dust, oil, cigarette grease, etc. are prevented from adhering to the fulcrum, and the shutter opening / closing operation failure is not caused.

In the shutter opening / closing structure, in order to assemble the shutter and the shutter support shaft without deforming the shutter, the lower shutter holding portion for supporting the shutter has a spring property. The used shutter and the shutter support shaft are assembled without deformation.

In the present invention, the size is limited by providing a shutter in each semicircular part divided into two in the vertical direction in the air passage, and the distance from the rotation fulcrum to the shutter tip when the shutter is opened and closed is about 1/2 of the conventional one. The shutter opening and closing device can be freely installed at the designated location, and the installation becomes convenient.
Further, the apparatus main body can be miniaturized.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a ventilation hood main body, and reference numeral 2 denotes wind guides 2a, 2b, 2c formed on the outer periphery by cutting and raising with a sheet metal or the like formed on the outer periphery of the hood main body. 3 is a flange for attaching the hood body 1 to the wall surface A in the room, and 4 is a duct connection air passage that is inserted into a ventilation port B penetrating the wall surface and has a cylindrical shape. This duct connection air passage is formed with a wind passage C through which indoor air passes outside.

  The flange 3 is a part that is integrated with the exhaust hood main body 1 and supports the ventilation hood, and is fixed to the outdoor wall surface A with a wood screw or the like (not shown) and is detachable. The duct connection air passage 4 is fixed to the flange 3. The ventilation hood main body 1 prevents the wind and rain from the outside from entering the room, and has a trapezoidal shape. The gallery 2 is located between the tip hood 1a and the flange 3, and prevents wind from entering from the side, top, and bottom of the outdoor hood. The wind guide 2a is inclined to the outdoor side from the wall surface to which it is attached. 2b and 2c are arranged around the entire circumference between the tip hood 1 and the flange 3, and this gallery 2 is fixed to the flange 3 with screws. Reference numeral 7 denotes a tip hood mounting bracket, which is a component that joins the tip hood 1 and the louver 2. One end 7 a of the tip hood mounting bracket 7 is inserted into a coupling portion 2 d formed in the louver 2, so that it can be detached. Yes. The other end 7b of the tip hood mounting bracket 7 is fixed to the hood 1 by welding or the like. The lower side of the tip hood connects the hood 1 and the louver 2 with a mounting bracket 8. The mounting bracket 8 is installed at two locations so that the tip hood 1a is held by the louver 2, and the mounting hole 8a provided at the tip is fixed to the louver 2 by using a mounting screw 12. It has become. The tip 8b of the tip hood mounting bracket 8 is fixed to the tip hood 1a.

  In FIG. 2, reference numeral 9 denotes a shutter, which is disposed in the air path C of the duct connection air path 4. The shutter 9 has a semicircular shape obtained by dividing the cylindrical air path into two. This shutter is divided into two on the left and right, and is configured to open and close the inside of the cylindrical air passage C. Reference numeral 10 denotes a shutter support shaft that supports the shutter 9 so as to be rotatable. One support shaft 10 is attached to each shutter 9. The shutter is provided in the air passage C so as to naturally close the air passage C when attached to the air passage 4 and to open in the outdoor direction by the wind pressure of air forced out of the room.

  2 and 3 show the structure of the shutter 9 and the shutter shaft 10, and the shaft cores at two positions above and below the shaft have a concave shape 10a. As shown in FIGS. 4 and 6, the lower side when the shutter 9 is attached supports the shutter shaft core recess 10 a at the tip portion 6 a of the lower shutter support shaft holding portion 6. As shown in FIGS. 5 and 7, the upper shutter support shaft inserts the shutter support shaft 10 into the hole 5a of the upper shutter holding portion to support the outer periphery 10c of the shutter support shaft. When the shutter is inserted, the lower shutter holding portion 6 has a spring property, and is attached by inserting the concave portion 10a of the shutter support shaft by pushing downward as indicated by an arrow in FIG.

  5 and 6, reference numeral 5 denotes a shutter support shaft holding portion provided on the upper side of the air passage, and reference numeral 6 denotes a shutter support shaft holding portion provided on the lower side. The holding portions 5 and 6 are fixed to a substantially central portion inside the duct connection air passage 4. FIG. 6 shows the structure of the holding portion 6. By providing the lower holding portion 6 with a rising portion 6b, the rising portion 6b comes into contact when the shutter 9 is opened as shown in FIG. I am trying not to. In this way, as shown in FIG. 1, the structure prevents the malfunction by preventing the shutter from opening in the opening direction of other shutters as shown in FIG.

  Further, as shown in FIG. 2, the shutter shaft 10 is provided with a tongue portion 10d that protrudes toward the side opposite to the shutter from a line 10e connecting the shaft core. In this way, when the shutter is closed, the gap is prevented and the two shutters support each other. Therefore, it is possible to prevent malfunction such as no extra operation from a predetermined closed position.

Embodiment 2. FIG.
The second embodiment will be described with reference to FIG. By attaching the shutter weight 11 to the two left and right shutters 9, when there is no wind in the air passage, when the shutter closes, the moment that rotates in the closing direction is increased so that the two shutters are securely closed. It is what.

In addition, the shutter rotation shaft is provided in a direction perpendicular to the air path direction so that the same load is applied to both of the two shutters, so that the opening / closing operation can be performed smoothly.

Also, in order to perform reliable closure with two shutters, the upper side of the rotation axis is tilted (when the air passage is viewed from the side, the upper axis of the shutter is shifted to the indoor side from the lower axis) The center of gravity of the shutter produces a moment to rotate in the direction in which the shutter closes with respect to the axis, and the air path can be reliably closed with two shutters.

Further, by making the shaft shape serving as a fulcrum of the shutter and the shutter shaft portion where the two shutters overlap each other from a soft resin material, abnormal sounds such as metal rubbing noise and vibration noise can be reduced.

In addition, by protruding the shutter shaft from the line that connects the shutter axis, the gap is prevented when the shutter is closed, and the two shutters support each other. It is possible to prevent malfunctions such as

In addition, the shutter is supported by the inner side of the recess with the lower shaft core in the center, which is the fulcrum of the shutter, and the upper shaft is supported by the outer periphery of the shaft core, thereby preventing adhesion of dust, oil, tobacco oil, etc. to the fulcrum. Thus, it is possible to prevent malfunction.

Also, in order to assemble the shutter without deforming the shutter, the lower receiving parts that support the shutter are made of a material with springiness, and when assembling, the shutter and support shaft are not deformed using the springiness. Can be assembled.

1 is a cross-sectional view of an air hood opening / closing device for an outdoor hood showing Embodiment 1. FIG. It is the figure which looked at the shutter structure of Embodiment 1 from the front. FIG. 3 is a partial cross-sectional view of a shutter support shaft portion according to the first embodiment. FIG. 3 is a partial cross-sectional view of the shutter opening / closing mechanism lower part support according to the first embodiment. FIG. 5 is an upper shutter support shaft holding part 5 component diagram of the first embodiment. 6 is a component diagram of a lower shutter holding unit 6 according to the first embodiment. FIG. FIG. 3 is a partial cross-sectional view of the upper part of the shutter opening / closing mechanism according to the first embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Ventilation hood main body, 1a Tip hood, 2 Galley, 3 Flange, 4 Connection air path, 5 Upper shutter holding part, 6 Lower shutter holding part, 7 Tip hood mounting bracket, 8 Mounting bracket, 9 Shutter, 10 Shutter Support shaft, 11 weights

Claims (6)

A cylindrical air passage connected to the opening and exhausting indoor air to the outside is provided inside the ventilation hood used for the ventilation opening provided in the building, and two semicircles are provided in the cylindrical air passage. Ventilation hood airway opening and closing device with a shutter that can be opened and closed The air path opening and closing device for an outdoor hood according to claim 1, wherein the rotation axes of the two shutters are configured in a direction perpendicular to the air path direction, and each of the shutters is provided with a rotation axis. The ventilation hood wind according to claim 1, wherein an upper end of the rotation shaft of the shutter is disposed on the indoor side with respect to a vertical line, and a lower end is disposed on the outdoor side so that the upper portion of the shutter is inclined toward the indoor side. Road switchgear. Provided with a gap preventing tongue extending from the rotation axis of the two shutters opposite to the shutter arc, and formed so that this tongue overlaps the end of another shutter rotation fulcrum when the shutter is closed, The air passage opening and closing device for a ventilation hood according to claim 1, wherein the tongue is made of synthetic resin. In the rotation support shaft of the shutter, the lower side of the shutter axis is formed with a recess in the center of the shaft, and the recess is supported by a shutter holding portion provided in the air passage, and the upper side is provided by a shutter holding portion provided in the upper portion of the air passage. The air passage opening and closing device for a ventilation hood according to claim 1, wherein the shaft core is engaged with the formed hole and supported by the upper and lower portions of the shaft core. 6. The air passage opening and closing device for a ventilation hood according to claim 5, wherein, in the shutter support structure, a lower holding portion for supporting the shutter is made of a material having a spring property.

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