JP2009186112A - Grill for gas supply and discharge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grill for gas supply and discharge reducing ventilation resistance, facilitating operability, and reducing flapping of a damper controlling an opening area. <P>SOLUTION: The grill for gas supply and discharge has: an adjustment screw 3 in a grill connection body used as a ventilation passage communicated with a louver 22; a movable member 4 screwed onto the adjustment screw 3 and moving in an axial direction; a pair of semicircular dampers 5 rotatably journalled to a rotary spindle used as a rotary support member; and a knob 6 as an operation part of the adjustment screw 3. The movable member 4 is equipped with: a cylindrical shaft part 41 screwed to the adjustment screw 3; an arm member 42 rotatably connected in a vertical direction to the cylindrical shaft part 41 and extending in a radial outer circumference side; and an engagement part (e.g., a half-cylindrical part 45) as a connection part with the damper 5 on an end of the arm member 42. The engagement part is rotatably fitted in an engagement part (e.g., a pin 55) formed in a damper 5 side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air supply / exhaust grill used for indoor air supply / exhaust.

  An air supply / exhaust grill used for indoor air supply / exhaust is used as a blowout grill or a suction grill in an air conditioning system or a ventilation system. The supply / exhaust grill shown in FIGS. 8 and 9 is an example of the prior art. This air supply / exhaust grill is known to have a large opening ratio when the opening area of the air supply / exhaust opening is maximized, thereby reducing ventilation resistance and facilitating its operability.

  This air supply / exhaust grill is formed by combining a duct connector 101 and a gutter member 102 that form a ventilation path. A support member 104 having a louver 103 is attached to the inside of the duct connector 101 on the flange member 102 side. Further, two sets of a pair of rotating support shafts 105 are formed on the inner side of the support member 104 in the duct connection body 101, and a pair of semicircular disk-shaped split molds are formed on the two sets of the rotating support shafts 105. The damper (shutter) 106 is rotatably supported. On both sides of the straight side portion 106 a of the damper 106, bearing portions 106 b that are fitted to the rotary support shaft 105 are formed.

  In the damper 106, a groove 107 having a wide inner depth is formed extending from the straight side portion 106a to the outer peripheral portion in a direction perpendicular to the straight portion 106a. On the other hand, an adjustment screw 108 having a multi-threaded male screw on the outer periphery is attached to the support member 104 at the center of the duct connection body 101 between the two dampers 106, and a movable member 109 is attached to the adjustment screw 108. Are screwed together. The movable member 109 has an internal thread formed on the inner surface of the cylindrical portion 110 to be screwed with an adjustment screw. Further, an arm 111 is integrally formed in the radial direction from the cylindrical portion 110 so as to protrude. A pin 112 which is inserted into the groove 107 and made slidable is formed in the portion. Further, the shaft portion of the knob 114 is inserted into the lower end of the adjustment screw 108 from the outside through a through hole 113 formed in the center portion of the support member 104. The shaft portion is screwed by a set screw 108b inserted from above the adjustment screw 108 into the hole 108a in the center portion. The dimension between the tips of the two pins 112 is formed to be larger than the distance between the two rotation support shafts 105 arranged next to each other.

  In the supply / exhaust grill formed in this way, when the knob 113 is rotated, the adjustment screw 108 coupled to the knob 113 is rotated, and the movable member 109 can be moved up and down. When the movable member 109 is moved upward, the pin 112 formed at the tip of the arm 111 moves in the outer peripheral direction in the groove 107, and the outer periphery of the damper 106 is pulled toward the adjusting screw, thereby opening the damper 106. Operate. When the movable member 109 is moved downward, the pin 112 moves toward the straight side portion 106a and presses the damper 106 downward, so that the damper 106 is closed. As described above, the air supply / exhaust grill is easy to operate, has a large aperture ratio, does not rebound the air flowing through the duct connector 101, and reduces noise.

Such an air supply / exhaust grill is described in Patent Document 1 and Non-Patent Document 1.
Japanese Examined Patent Publication No. 6-58181 National 2005-2006 Environmental General Catalog, Matsushita Ecosystems, 2005.3.1, p34

  In the above-described conventional configuration, in the mechanism that opens and closes the damper 106, play between the rotary support shaft 105 and the bearing portion 106b, play between the pin 112 and the groove 107, and further, the pin 112 slides in the groove 107. With this configuration, there is a problem that the damper 106 has a large flutter. Note that the fluttering is such that the smaller the opening degree of the damper 106, the closer the pin 112 is to the straight side 106a. Therefore, the play between the pin 112 and the groove 107 or the pin 112 moves in the sliding direction in the groove 107. Such an effect occurs on the side 106a of the damper 106. For this reason, as the opening degree of the damper 106 is smaller, the fluttering tends to increase. In order to reduce this fluttering, in an actual commercial product, a coil spring 114 is attached between the right side portions 106a of the two dampers 106 to attract the right side portions 106a opposed to one end thereof. However, in the case where such a coil spring 114 is attached, there is a problem that not only the structure becomes complicated, but also the effect of reducing flapping cannot be expected.

  The present invention has been made on the basis of such a background, and the object thereof is to increase the opening area of the air supply / exhaust port to reduce ventilation resistance, facilitate its operability, and further reduce the opening area. An object of the present invention is to provide an air supply / exhaust grill that reduces fluttering of a damper to be controlled.

  The air supply / exhaust grill according to the present invention solves such a problem, and is arranged at the center of the ventilation passage communicating with the louver and has an external screw formed on the outer periphery thereof, and the adjustment. A movable member that is screwed into the screw and moves in the axial direction on the male screw of the adjustment screw, and is formed in a semicircular shape, with respect to the rotation support portion of the wall surface of the ventilation path at both ends of the semicircular straight portion A pair of semicircular dampers that are pivotally supported and coupled to the movable member and driven to open and close in conjunction with the operation of the movable member, and an operation unit that rotates the adjustment screw. In the supply / exhaust grill, the movable member has a cylindrical shaft portion formed on the inner periphery of a female screw to be engaged with a male screw of the adjustment screw, and a direction perpendicular to the axial center of the adjustment screw with respect to the cylindrical shaft portion. The outer periphery is connected to the center of rotation to be freely rotatable An arm member that extends, and an engaging portion that serves as a connecting portion between the damper and the damper formed at the tip of the arm member. It is formed so that it can be freely fitted around a direction perpendicular to the stretching direction as a center of rotation.

  According to the air supply / exhaust grill according to the present invention having such a structural feature, the engagement between the arm member of the movable member and the damper is rotatably engaged. Therefore, the play at the engaging portion between the arm member and the damper is smaller than that of the conventional one. As a result, the bumping of the damper can be reduced. In addition, since a conventional coil spring is not required to be attached, the structure is simplified. In addition, since the engagement between the arm member of the movable member and the damper is supported at the same position regardless of the opening degree of the damper, the fluctuation does not change or increases depending on the opening degree of the damper. Quality.

  Further, the movable member can be a resin molded product in which the cylindrical shaft portion and the arm member are connected by a thin connecting portion, and the thin connecting portion functions as a hinge. If comprised in this way, since the play in the rotatable connection part of a cylindrical shaft part and an arm member will be lose | eliminated, the flapping of a damper can be reduced further. Further, the structure is simplified and the cost is reduced.

  In the movable member, the position of the connecting portion between the cylindrical shaft portion and the arm member is located on the side opposite to the louver side from the rotation center position of the engaging portion between the arm member and the damper, and the position of the connecting portion and the engaging portion It is preferable that the opening degree of the damper increases as the axial distance from the rotation center position increases. If it does in this way, when the damper will move in the opening direction, the arm member is configured to prevent this movement, so that the flapping of the damper is reduced.

  In addition, the damper is formed with a groove that is recessed toward the louver side from the central part of the straight side part toward the outer periphery in the radial direction, and a pin that crosses the groove is formed as the engaging part on the damper side, and the movable The member may be formed with a half-cracked cylindrical portion that is fitted into the pin from the radial direction of the pin as an engaging portion formed at the tip of the arm member. If comprised in this way, since a groove part plays the role of the reinforcement rib of a damper, the rigidity of a damper will become large and the flapping of a damper can be reduced. Moreover, since the pin of the damper engaged with the half-cracked cylindrical portion of the arm member is formed so as to cross the groove portion, the half-cracked cylindrical portion of the arm member can be rotated without hindrance.

  Moreover, it is preferable that the knob is fitted and inserted in the axial direction with respect to the adjustment screw. With this configuration, screwing is not required as in the prior art, and assembly and disassembly are easy.

  Further, it is preferable that the knob is attached through the insertion hole of the knob in the louver and is prevented from coming off from the adjusting screw by the insertion hole. If comprised in this way, while the opening degree of a damper can be easily adjusted from the exterior of a grill member, it is prevented that a knob falls from an adjustment screw.

  According to the grill for air supply / exhaust according to the present invention, the play at the engaging portion between the arm member of the movable member and the damper is smaller than that of the conventional one, so that the flapping of the damper is reduced. In addition, since a conventional coil spring is not required to be attached, the structure is simplified. In addition, since the engagement between the arm member of the movable member and the damper is supported at the same position regardless of the opening degree of the damper, the flutter does not change depending on the opening degree of the damper, and the quality can be stable. it can.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an air supply / exhaust grill according to an embodiment of the present invention will be described with reference to the drawings. In the supply / exhaust grill according to the embodiment, as shown in the exploded perspective view of FIG. 1, a grill mounting member 1 attached to an installation member W (see FIGS. 2 and 3) such as a ceiling plate and a wall plate, and the grill And a grill member 2 attached to the attachment member 1 from the outside. Further, inside the cylindrical duct connector 11 of the grill mounting member 1, there are an adjustment screw 3, a movable member 4 that is screwed to the adjustment screw 3 and moves up and down, and a half-cracked disk that is connected to the movable member 4. The assembly | attachment goods which assembled | attached the damper 5 of the shape are attached. Furthermore, a knob 6 for rotating the adjustment screw 3 from the outside is provided at the end of the adjustment screw 3.

As shown in FIG. 5, the grill attachment member 1 is a member in which a cylindrical duct connector 11 that forms a ventilation path is attached to the inner surface side of a substantially rectangular flat plate portion 12. A grill attachment hole Wa for inserting the cylindrical duct connection body 11 is formed in the installation member W such as a ceiling plate or a wall plate, and the cylindrical duct connection body 11 is inserted into the grill attachment hole Wa from the indoor side ( (See FIGS. 2 and 3). In addition, mounting screw through holes 13 are provided at the four corners of the flat plate portion 12, and wood screws 14 are screwed into the ceiling material or wall material around the grill mounting hole Wa from the four corner mounting screw through holes 13. Has been. In addition, on the inner wall surface of the duct connection body 11, two sets of a pair of rotation support shafts 15 are provided as rotation support portions for rotatably supporting the damper 5. The rotation support shaft 15 is provided at a position close to the flat plate portion 12 in the duct connector 11. In addition, an inner flange-shaped contact plate 16 that abuts the peripheral portion of the damper 5 when the damper 5 is fully closed is provided around the entire periphery of the duct connection body 11. The position of the abutment plate 16 is formed so as to be located slightly on the louver side of the rotation support shaft 15. Further, as shown in FIGS. 2 and 3, a stepped portion 33 below the adjustment screw 3 is brought into contact with the central portion of the duct connector 11 at the axial position of the abutting plate 16, and further, the tip end portion thereof. A support member 18 having a constant width provided with a through-hole 17 that penetrates 34 is provided (see FIG. 3).

  As can be seen from the perspective view of FIG. 1 or the cross-sectional views of FIGS. 2 and 3, the grill member 2 is attached to the grill attachment member 1 from the indoor side by a tapping screw 21. The grill member 2 has a substantially square shape in plan view, and a substantially square louver 22 is formed at the center. In addition, screw holes 23 (see FIG. 1) for screwing the grill member 2 to the grill mounting member 1 with tapping screws 21 are formed at the four corners of the louver 22. In the grill mounting member 1, a lower hole 19 for screwing the tapping screw 21 is formed at a portion corresponding to the screw hole 23. Further, an insertion hole 24 is formed at the center of the louver 22 so that the head 61 of the knob 6 protrudes from the grill mounting member 1 side to the indoor side. Since the insertion hole 24 is formed slightly smaller than the maximum diameter portion 61a on the shaft portion 62 side of the head 61 in the knob 6, the maximum diameter portion 61a is configured not to penetrate (FIG. 2). FIG. 3).

  As shown in FIGS. 1 to 4, the adjusting screw 3 includes a shaft portion 31 having a multi-threaded male screw formed on the outer periphery, and prevents the movable member 4 from jumping upward on the anti-louver side. A hook-shaped stopper 32 is formed. Further, a stepped portion 33 having a reduced outer shape is formed at the louver side end portion, and a fitting insertion hole 35 for fitting the end portion of the shaft portion 62 of the knob 6 is formed at the tip end portion 34 thereof. .

  As shown in FIGS. 4 and 6, the movable member 4 includes a cylindrical shaft portion 41 having an internal thread that is screwed into a male screw of the shaft portion 31 of the adjustment screw 3, and the cylindrical shaft portion 41. This is a resin integrated molded product including a pair of arm members 42 extending in the radial direction with a width dimension slightly smaller than the diameter of the portion 41. The arm member 42 is obtained by extending a thin plate-like portion 43 radially outward from the cylindrical shaft portion 41. The connecting portion 44 with the cylindrical shaft portion 41 is cut into a V-shaped surface on the side opposite to the louver. It is inserted into a thin wall and functions as a hinge. A half-cracked cylindrical portion 45 is formed at the tip of the arm member 42 as an engaging portion that engages with the engaging portion of the damper 5. The half crack cylindrical portion 45 forms a connecting portion with the damper 5. The arm member 42 is connected to the cylindrical shaft portion 41 by the connecting portion 44 as described above, so that the arm member 42 extends in the axial direction of the adjusting screw 3 with the horizontal axis perpendicular to the axis of the adjusting screw 3 as the rotation center (FIG. 4). In other words, it is formed so as to rotate (in the vertical direction).

  As shown in FIGS. 1 and 4, the damper 5 includes a pair of semi-disk-shaped semicircular members 51 formed symmetrically. As shown in FIG. 7, the semicircular plate member 51 is provided with bearing portions 53 at both ends of the straight side portion 52. The semicircular plate-like member 51 is rotatably supported in the duct connection body 11 by fitting the rotation support shaft 15 provided in the duct connection body 11 to the bearing portion 53. Further, the semicircular plate-like member 51 is formed with a U-shaped groove portion 54 that is recessed toward the louver side from the central portion of the straight side portion 52 toward the outer periphery in the radial direction, and is movable at a substantially central position of the groove portion 54. A pin 55 as an engaging portion that engages with the half-cracked cylindrical portion 45 as an engaging portion of the member 4 is formed so as to cross the groove portion 54. The damper 5 is coupled to the movable member 4 by fitting a half-cracked cylindrical portion 45 as an engaging portion of the arm member 42 to the pin 55 of the damper 5 from the outside in the radial direction of the pin 55.

  The knob 6 is an operation unit for rotating the adjustment screw 3 and includes a head portion 61 and a shaft portion 62 as shown in FIG. The head 61 has a shape that tapers toward the distal end, and the base end (the end on the shaft side) is formed in a maximum diameter portion 61a defined by a stepped portion. Further, the tip of the shaft portion 62 is fitted into the fitting insertion hole 35 of the tip portion 34 of the adjustment screw 3, but is formed in a substantially rectangular cross section so as not to idle in the fitting insertion hole 35.

The supply / exhaust grill configured as described above is assembled as follows.
First, the cylindrical shaft portion 41 of the movable member 4 is screwed to the shaft portion 31 of the adjustment screw 3, and the movable member 4 is attached to the adjustment screw 3. Next, a damper 5 is attached to the movable member 4. When attaching the damper 5, first, the arm member 42 is bent downward, that is, the louver side, with the connecting portion 44 like a hinge, and the damper 5 is engaged with the half-cracked cylindrical portion 45 formed at the tip of the arm member 42. The pin 55 as a joint is fitted. Thereby, the half-cracked cylindrical portion 45 and the pin 55 are rotatably engaged.

  Next, the bearing portion of the damper 5 is inserted into the through hole 17 of the support member 18 while the tip end portion 34 of the adjustment screw 3 assembled in this way is inserted into the through hole 17 of the support member 18. 53 is fitted into the rotation support shaft 15 provided in the duct connection body 11, and the assembly body of the adjusting screw 3, the movable member 4 and the damper 5 is attached to the grill attachment member 1. Further, the shaft portion 62 of the knob 6 is fitted into the fitting insertion hole 35 of the distal end portion 34 of the adjustment screw 3, and the knob 6 is attached to the adjustment screw.

  Next, the adjustment screw 3, the assembly of the movable member 4 and the damper 5, and the grill attachment member 1 to which the knob 6 is attached are attached to an installation member W, for example, a ceiling plate. This attachment is performed by inserting a duct connector portion into the installation member W from the indoor side to the grill attachment hole Wa of the installation member W such as a ceiling board and attaching it with a wood screw 14 or the like.

  Next, the grill member 2 is attached to the grill attachment member 1 attached to the installation member W such as the ceiling by the tapping screw 21 from the indoor side. When the grill member 2 is attached, as shown in FIGS. 2 and 3, the head 61 of the knob 6 protrudes from the grill member 2, and the knob 6 is prevented from coming off from the adjustment screw 3. .

  The air supply / exhaust grill assembled and attached in this way can move the movable member 4 up and down by rotating the knob to the left and right. When the movable member 4 is moved upward (toward the anti-louver side) by operating the knob 6, the connecting portion 44 between the cylindrical shaft portion 41 and the arm member 42 moves upward (toward the anti-louver side). The engaging portion with the damper 5 is attracted to the adjustment screw 3 side, and the damper 5 moves in the opening direction. At this time, the distance in the axial direction of the adjusting screw between the connecting portion 44, the arm member 42, and the engaging portion of the damper 5 is increased. On the contrary, when the movable member 4 is moved downward (to the louver side) by operating the knob 6, the connecting portion 44 between the cylindrical shaft portion 41 and the arm member 42 is moved downward (to the louver side). Then, the engagement portion between the arm member 42 and the damper 5 is pressed in a direction away from the adjustment screw 3, and the damper 5 moves in the closing direction. At this time, the distance in the axial direction of the adjustment screw between the connecting portion 44, the arm member 42, and the engaging portion of the damper 5 is reduced.

  In such a drive of the damper, the axial distance of the adjusting screw between the connecting portion 44, the arm member 42 and the engaging portion of the damper 5 varies depending on the opening of the damper 5, but the cylindrical shaft portion 41 and the arm member. The connecting portion 44 with the position 42 is always located above (on the side opposite to the louver) the engaging portion between the arm member 42 and the damper 5. For this reason, when the damper 5 tries to move in the opening direction when the arm member 42 is not moved, a force that prevents the movement of the damper 5 in the opening direction from the arm member 42 acts, and fluttering of the damper 5 is suppressed. .

According to the grill for air supply / exhaust according to the present embodiment configured as described above, the following effects can be obtained.
(1) Since the half-cracked cylindrical portion 45 as the engaging portion of the arm member 42 in the movable member 4 is rotatably fitted and engaged with the pin 55 as the engaging portion of the damper 5, the arm member 42. The play at the engaging portion between the damper 5 and the damper 5 is smaller than that of the conventional one. As a result, flapping of the damper 5 can be reduced. In addition, since a conventional coil spring is not required to be attached, the structure is simplified. Further, since the engagement between the arm member 42 of the movable member 4 and the damper 5 is supported at the same position regardless of the opening degree of the damper 5, the flapping changes or increases depending on the opening degree of the damper 5. And stable quality can be achieved.

  (2) The movable member 4 is a resin molded product in which the cylindrical shaft portion 41 and the arm member 42 are connected by a thin connecting portion 44, and the thin connecting portion 44 functions as a hinge. Therefore, the structure is simplified and the cost is reduced. Further, since there is no play in the rotatable connecting portion between the cylindrical shaft portion 41 and the arm member 42, the flapping of the damper can be further reduced.

  (3) In the movable member 4, the position of the connecting portion 44 between the cylindrical shaft portion 41 and the arm member 42 is located on the anti-louver side from the rotational center position of the engaging portion between the arm member 42 and the damper 5, The damper 5 is configured so that the opening degree of the damper 5 increases as the axial distance between the position 44 and the rotation center position of the engaging portion increases. Therefore, when the damper 5 tries to move in the opening direction, the arm member 42 acts to prevent this movement, so that the flapping of the damper 5 is reduced.

  (4) The damper 5 is formed with a groove portion 54 that is recessed toward the louver from the central portion of the straight side portion 52 toward the outer periphery in the radial direction, and a pin 55 that crosses the groove portion 54 as an engaging portion. The movable member 4 is formed with a half-cracked cylindrical portion 45 that is fitted into the pin 55 from the radial direction of the pin 55 as an engaging portion formed at the tip of the arm member 42. For this reason, since the groove part 54 plays the role of the reinforcement rib of the damper 5, the rigidity of the damper 5 becomes large. The rigidity of the damper 5 is increased, and fluttering of the damper 5 can be reduced. Further, since the pin 55 of the damper 5 that engages the half-cracked cylindrical portion 45 of the arm member 42 is formed so as to cross the groove portion 54, the half-cracked cylindrical portion 45 of the arm member 42 can be rotated without any trouble. .

(5) The knob 6 is fitted and inserted in the axial direction with respect to the adjusting screw 3 and is not required to be screwed as in the prior art, so that assembly and disassembly are easy.
(6) The knob 6 is attached through the insertion hole 24 of the knob 6 in the louver 22 and is prevented from coming off from the adjusting screw 3 by the insertion hole 24, so that it can be easily removed from the outside of the grill member 2. The opening degree of the damper 5 can be adjusted, and the knob 6 is prevented from falling off the adjusting screw 3.
(Modification)
The supply / exhaust grill and the supply / exhaust grill according to the present embodiment described above are merely examples, and can be appropriately changed within the scope of the present invention. For example, it can be modified as follows.

  (1) Although the movable member 4 is formed as a resin integral molded product, the connecting portion between the cylindrical shaft portion 41 and the arm member 42 is a separate hinge mechanism, or the tip of the arm member 42 and the rotation of the damper 5 are rotated. You may use the hinge mechanism comprised by another member in the free engaging part.

  (2) Although the half crack cylindrical part 45 is provided at the tip of the arm member 42 and the pin 55 is provided on the damper 5, the pin is provided on the tip side of the arm member 42, and the half crack cylindrical part is provided on the damper 5 side. You may make it engage these.

  (3) When this supply / exhaust grill is used as a suction grill, an air filter made of a porous resin material or the like may be installed on the grill mounting member side of the louver 22 of the grill member 2.

  (4) The knob 6 is configured such that the head protrudes outside the grill member. However, the operation part such as the knob 6 may not be exposed to the outside so as to improve the design. .

(5) Since one side of the louver 22 in the grill member 2 is larger than the diameter of the duct connector 11, the diameter of the duct connector 11 and the damper 5 is increased within the dimension of one side of the louver 22. The processing air volume of the supply / exhaust grill can be increased.

  (6) Regarding the attachment of the damper 5, the bearing portions 53 are provided at both ends of the straight side portion 52 of the semicircular disk-like member 51, and the rotary support shaft 15 that supports the bearing portion 53 is connected to the duct of the grill attachment member 1. Although provided in the body 11, this may be reversed. That is, a bearing part may be provided in the duct connector 11 as a rotation support part, and a rotation shaft may be provided at both ends of the straight side part 52 of the semi-disc member 51.

It is a disassembled perspective view of the grill for air supply / exhaust concerning the embodiment of the present invention. FIG. 4 is a cross-sectional view of the same supply / exhaust grill, in a fully closed state of the damper. The supply / exhaust grill is in a half-open state of the damper. It is a perspective view of the damper opening / closing mechanism part of the same supply / exhaust grill. It is a component figure of the grill attachment member of the grill for the same supply and exhaust air, (a) is a top view and (b) is an AA sectional view in (a). It is a component diagram of the movable member of the supply / exhaust grill, wherein (a) is a perspective view in a natural state, (b) is a cross-sectional view along BB in (a), and (c) is transformed into a use state. FIG. It is a component figure of the damper of the supply-and-exhaust grill, Comprising: (a) is a perspective view, (b) is CC sectional drawing in (a). It is sectional drawing of the grill for air supply / exhaust concerning a prior art example. It is a perspective view of the damper opening-and-closing mechanism around the grill for the same supply and exhaust.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 3 ... Adjustment screw, 4 ... Movable member, 5 ... Damper, 11 ... Duct connection body (forms a ventilation path), 15 ... Rotation spindle (as a rotation support member), 22 ... Louver, 24 ... Insertion hole, 41 ... Cylindrical shaft part, 42 ... arm member, 44 ... connecting part, 45 ... cylindrical part, 52 ... straight side part, 54 ... groove part, 55 ... pin.

Claims (6)

An adjustment screw that is arranged at the center of the ventilation path that communicates with the louver and has an external thread formed on the outer periphery,
A movable member that is screwed onto the adjustment screw and moves axially on the male screw of the adjustment screw;
It is formed in a semi-disc shape, and is rotatably supported at both ends of the semi-disc-shaped straight side portion with respect to the rotation support portion of the wall surface of the ventilation path, and is connected to the movable member, and the operation of the movable member A pair of semi-disc shaped dampers that are driven to open and close in conjunction with,
In an air supply / exhaust grill having an operation portion for rotating the adjustment screw,
The movable member has a cylindrical shaft portion formed on the inner periphery of a female screw to be engaged with a male screw of the adjustment screw, and is rotatable about a direction perpendicular to the axis of the adjustment screw with respect to the cylindrical shaft portion. An arm member that is connected and extends radially outward, and an engagement portion as a connection portion with the damper formed at the tip of the arm member,
The engaging portion is formed so as to be rotatably fitted to an engaging portion formed on the damper side with a direction perpendicular to the extending direction of the arm member as a rotation center. Grill.   2. The air supply / exhaust according to claim 1, wherein the movable member is a resin molded product in which the cylindrical shaft portion and the arm member are connected by a thin connecting portion, and the thin connecting portion functions as a hinge. Grill.   In the movable member, the position of the connecting portion between the cylindrical shaft portion and the arm member is located on the side opposite to the louver side from the rotation center position of the engaging portion between the arm member and the damper, and the position of the connecting portion and the rotation of the engaging portion are 3. The grill for supplying and exhausting air according to claim 1, wherein the opening of the damper increases as the axial distance from the center position increases. The damper is formed with a groove portion that is depressed toward the louver side from the center portion of the straight side portion toward the outer periphery in the radial direction, and a pin that crosses the groove portion is formed as an engagement portion on the damper side,
The said movable member is formed with the half crack cylindrical part inserted from the radial direction of a pin with respect to the said pin as an engaging part formed in the front-end | tip of the said arm member. Supply / exhaust grill.   The supply / exhaust grill according to any one of claims 1 to 4, wherein the knob is connected to the adjustment screw by being fitted and inserted in an axial direction.   6. The air supply / exhaust grill according to claim 5, wherein the knob is attached through a knob insertion hole in the louver and is prevented from coming off from the adjustment screw by the insertion hole.

Images