JP4900142B2 - Ventilation grill - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a ventilation grill that is connected to a heat exchange type ventilation device or a blower device installed on the back of a ceiling of a building through a duct through which air passes and in which air is blown out or sucked. Is.

  Conventionally, a ventilation grill attached to a ceiling or the like of a building has a configuration in which a flange portion that is abutted against a plate material constituting the ceiling is directly attached with a wood screw or the like.

  On the other hand, a configuration has been proposed in which a fixture is provided to sandwich a plate material between the flange portion and the fixture can be opened and closed by turning a screw.

  For example, a ventilation grill has been proposed in which a fixing bracket is pivotally supported on the ventilation grill and includes a movable member that can be moved by turning a screw so that the fixing bracket can be opened and closed by raising and lowering the movable member (for example, , See Patent Document 1).

  There has also been proposed a ventilation grill provided with a fixture that opens and closes by turning a screw and moves up and down (see, for example, Patent Document 2).

Japanese Patent No. 3297558 Japanese Patent No. 3734991

  However, in the configuration shown in Patent Document 1, if a screw bites into the ventilation grille while a plate member such as a ceiling is sandwiched between the fixing brackets, if the screw is loosened to remove the ventilation grille, the fixing bracket is turned. Since the position of the movable member to be moved does not change and moves in the direction in which the screw is removed, there is a possibility that the fixing bracket cannot be opened. In this case, there is a possibility that the ventilation grill cannot be removed.

  Further, in the configuration shown in Patent Document 2, when the screws are loosened in order to remove the ventilation grill from the state where the plate member is clamped by the fixing bracket, the fixing bracket may be lowered without being closed. There was a risk that the ventilation grill could not be removed.

  The present invention has been made to solve such problems, and an object thereof is to provide a ventilation grill that can be reliably installed and removed.

  In order to solve the above-described problem, a ventilation grill according to the present invention is a flange that is attached to a ceiling or wall of a building, and is inserted into an opening formed in a plate material that constitutes the ceiling or wall, and is a flange that abuts against the plate material. A body portion having a portion, a guide portion standing on the flange portion, a movable member guided along the extending direction of the guide portion, and a movable member, and a hole portion formed in the flange portion. A screw member that is screwed into the movable member, a shaft hole portion into which the movable member is inserted, a fixing bracket that is rotatably supported by the movable member as a rotation shaft, and a fixed member that moves with the movement of the movable member. The metal fitting is provided with a rotation guiding means for applying a force in a direction rotating toward the plate member with a movable member as a rotation axis, and a removal preventing member for restricting the axial movement of the screw member.

  In the ventilation grill of the present invention, the main body portion with the fixing metal raised to the flange portion is inserted into the opening formed in the plate material constituting the ceiling or wall, and the screw member is rotated in the tightening direction. As a result, the fixing bracket rotates as the movable member descends, and the plate member is sandwiched between the fixing bracket and the flange portion. Thereby, a ventilation grill is attached to a ceiling or a wall.

  When removing the ventilation grille, the fixing member can be rotated by turning the screw member in the loosening direction to raise the movable member. At this time, even if the screw member is caught in the flange portion, when the screw member is loosened, the movement in the direction of coming out of the flange portion is prevented by the removal preventing member, and the biting is eliminated and the fixing bracket rises. It can be in a state in which it can be rotated.

  According to the ventilation grill of the present invention, when the screw member that rotates the fixing bracket is turned, the fixing bracket can be reliably operated, so that installation and removal can be performed reliably.

  Embodiments of a ventilation grill according to the present invention will be described below with reference to the drawings.

<Configuration example of ventilation grill according to this embodiment>
1 to 4 are configuration diagrams illustrating an example of a ventilation grill according to the present embodiment. FIG. 1 is a side sectional view of the ventilation grill 1A according to the present embodiment. FIG. 2 is a plan view of the ventilation grill 1A. 3 and 4 are perspective views of the ventilation grill 1A.

  The ventilation grill 1A of the present embodiment includes, for example, a heat exchange type ventilation device (not shown) installed on the back of the ceiling of a building, a grill main body 2 connected via a duct through which air passes, and the grill main body 2 Is provided with a fixing mechanism 3 that attaches to a plate 101 constituting a ceiling or a wall.

  The grill body 2 is formed on the periphery of the opening 20, an opening 20 through which air passes, a duct connection 20 a connected to the opening 20, a front panel 20 b that is detachably attached to the opening 20. A flange portion 21 is provided.

  In the flange portion 21, two guide rails 22 are erected as guide portions at two locations facing each other across the opening 20. In addition, the flange portion 21 has a first action point 23a and a second action point 23b that stand integrally inside the two guide rails 22 as rotation guiding means. Further, the flange portion 21 is formed with a hole 24 in which the screw 4 as a screw member is rotatably inserted with the axial direction parallel to the standing direction of the guide rail 22 inside the two guide rails 22. .

  The fixing mechanism 3 includes a nut plate 30 supported by the guide rail 22 so as to be movable up and down, and a fixing bracket 31 supported by the nut plate 30 so as to be rotatable.

  The nut plate 30 is an example of a movable member, and a groove portion 30a to be fitted to the guide rail 22 is formed at both ends of the plate material, and a screw hole into which the screw 4 inserted into the hole portion 24 is screwed is formed at the center.

  The fixing bracket 31 includes a shaft hole portion 31a into which the nut plate 30 is inserted at one end, and a pressing portion 31b at the other end. The shaft hole portion 31a is formed to penetrate the two opposing surfaces of the fixing bracket 31 with a diameter that allows the nut plate 30 to turn, and the nut plate 30 is inserted with both ends protruding.

  The fixing bracket 31 serves as a rotation guiding means for converting the movement of the nut plate 30, in this case, the linear movement by the guide of the guide rail 22 into the rotation of the fixing bracket 31 using the nut plate 30 as a rotation axis. The first rotation guiding portion 31c and the second rotation guiding portion 31d and a clamping notch portion 31e that allows a force to be applied in a direction in which the plate material 101 is clamped are provided on one end side.

  The first rotation guide portion 31c is formed by bending a part of two opposing surfaces of the fixing bracket 31 inward, and abuts against the first action point 23a by the linear motion of the nut plate 30 and rises. A force for rotating the nut plate 30 about the rotation shaft is applied to the fixed fixture 31 in the direction.

  The second rotation guiding portion 31d is formed on one end face of the two opposing surfaces of the fixing bracket 31, and the first rotation guiding portion 31c is pushed along with the linear motion of the nut plate 30. When the fixing bracket 31 is rotated by a predetermined amount, it is abutted against the second action point 23b. The second rotation guiding portion 31 d is configured by a curved surface that converts linear motion by the nut plate 30 into rotation of the fixing bracket 31 when abutted against the second action point 23 b.

  The clamping notch 31e is formed continuously from the second rotation guiding portion 31d on the end surface on one end side of the two opposing surfaces of the fixing bracket 31, and the second rotation is accompanied by the linear motion of the nut plate 30. When the movement guide portion 31c is pushed and the fixing bracket 31 is further rotated by a predetermined amount, it fits into the second action point 23b. Then, when the clamping notch 31e is fitted to the second action point 23b, the fixing bracket 31 is abutted against the second action point 23b in the vertical direction along the clamping direction of the plate material 101.

  Further, the fixing bracket 31 includes a guide portion 31 f that guides the screw 4 inserted into the hole portion 24. The guide portion 31f is formed by providing two protrusions on one end side of the portion connecting the two opposing surfaces of the fixing bracket 31, and the screw 4 is passed between the protrusions so that the fall of the screw 4 is suppressed.

  The screw 4 inserted in the hole 24 formed in the flange portion 21 of the grill main body 2 is attached with a removal preventing washer 40. The dropout washer 40 is an example of a dropout prevention member, and is attached to the shaft portion of the screw 4 with the flange portion 21 interposed therebetween, and restricts the movement of the screw 4 in the axial direction.

  Here, the hole 24 into which the screw 4 is inserted is opened with an inner diameter larger than the diameter of the screw 4, and the screw 4 is engaged with the inner peripheral surface of the hole 24 so that a female screw is not formed. Yes.

  However, if the screw 4 is slanted, etc., the screw 4 may bite into the inner peripheral surface of the hole 24, but the screw 4 is bitten into the hole 24 by providing a removal preventing washer 40. Even when the screw 4 is inserted, movement in the axial direction is prevented when the screw 4 is rotated, so that the biting is eliminated and the screw 4 cannot be removed.

  Further, a drop prevention nut 41 is provided at the tip of the screw 4 screwed into the nut plate 30. The removal prevention nut 41 is an example of a removal prevention fastening member, and is fastened to the tip of the screw 4. When the nut plate 30 moves linearly by loosening the screw 4, the nut plate 30 is prevented from coming off from the screw 4. Thus, the nut plate 30 and the fixture 31 are prevented from being detached from the grill body 2.

<Example of ventilation grill construction according to this embodiment>
5 to 13 are operation explanatory views showing an installation example of the ventilation grill of the present embodiment.

  First, as shown in FIG. 5, the screw 4 is loosened to raise the nut plate 30 to a predetermined position, and the grill body 2 is inserted into the opening 102 of the plate member 101 so that the fixing bracket 31 is raised, and the flange portion 21. Is abutted against the plate material 101. As a result, the fixture 31 enters the back side of the plate 101.

  After the flange portion 21 of the grill body 2 is abutted against the plate material 101, the screw 4 is turned in the tightening direction. When the screw 4 is tightened, the nut plate 30 is lowered by being guided by the guide rail 22, and the fixing bracket 31 in which the nut plate 30 is inserted into the shaft hole portion 31 a is lowered as the nut plate 30 is lowered.

  When the fixing bracket 31 is lowered, first, the first rotation guiding portion 31c of the fixing bracket 31 is pushed up against the first action point 23a of the grill body 2. As a result, as shown in FIG. 6, the fixing bracket 31 rotates in a direction in which the pressing portion 31 b approaches the plate member 101 while being lowered together with the nut plate 30, using the nut plate 30 as a rotation axis.

  When the fixing bracket 31 is lowered together with the nut plate 30 by further tightening the screw 4, the first rotation guiding portion 31 c is pushed up by the first action point 23 a of the grill body 2, and further rotates. As shown, the second rotation guiding portion 31 d is abutted against the second action point 23 b of the grill body 2.

  When the screw 4 is further tightened from the state where the second rotation guiding portion 31d is lowered to the position where the second rotation guiding portion 31d is abutted against the second action point 23d of the grill body 2, the nut plate 30 is inserted. From the position of the shaft hole portion 31a and the curved surface shape of the second rotation guiding portion 31d with which the second action point 23b is in contact, linear movement by the nut plate 30 causes the fixing bracket 31 with the nut plate 30 as the rotation shaft. Is converted to rotation.

  As a result, when the screw 4 is further tightened, the curved surface of the second rotation guiding portion 31d is guided to the second action point 23b of the grill body 2 as the nut plate 30 is lowered. Then, the nut plate 30 is rotated in a direction to fall on the rotation shaft, and the first rotation guiding portion 31c is separated from the first action point 23a of the grill body 2 as shown in FIG.

  When the nut plate 30 is rotated about the rotation shaft by further tightening the screw 4, the fixing bracket 31 is brought into contact with the second action point 23 b of the grill body 2 as shown in FIG. 9. As the nut plate 30 is lowered by tightening the screw 4 from the rotation guide portion 31d to the pinching notch portion 31e, the pinching notch portion 31e becomes the second action point of the grill body 2 as shown in FIG. Enter 23b.

  When the clamping notch 31e enters the second action point 23b of the grill body 2 and the screw 4 is further tightened, as shown in FIG. Rotates around the pivot axis.

  Then, the grill body 2 sandwiches the plate material 101 between the flange portion 21 and the fixing bracket 31 as shown in FIG.

  As a result, the grill body 2 is fixed to the plate material 101, and the front panel 20 b is attached to the grill body 2, whereby the ventilation grill 1 </ b> A installed on the plate material 101 is configured.

  Here, when the plate member 101 is sandwiched by the fixing bracket 31, the holding notch 31 e of the fixing bracket 31 is abutted against the second action point 23 b of the grill body 2. Accordingly, the fixing metal 31 and the second action point 23b of the grill body 2 are in contact with each other in the vertical direction along the holding direction of the plate 101, and the pressing force of the plate 101 by the fixing metal 31 is increased.

  When removing the ventilation grille 1A from the plate member 101, the screw 4 is turned in the loosening direction. When the screw 4 is loosened, the nut plate 30 is raised by being guided by the guide rail 22, and the fixing bracket 31 in which the nut plate 30 is inserted into the shaft hole portion 31 a is raised as the nut plate 30 is raised.

  As shown in FIG. 13, when the fixing bracket 31 is raised to a predetermined position, the second rotation guiding portion 31 d is rotated around the nut plate 30 as a rotation axis so that the second rotation guiding portion 31 d is the second action point of the grill body 2. It can rotate freely without contacting 23b.

  As a result, when the grill body 2 is extracted from the opening 102 of the plate material 101, the fixing bracket 31 hits the opening 102 and is raised in the direction of the arrow, so that the grill body 2 can be detached from the plate material 101.

  Here, when the screw 4 is inclined or the like, the screw 4 may be caught in the flange portion 21. However, since the screw 4 is provided with the prevention washer 40, even when the screw 4 is engaged with the flange portion 21, it is prevented from moving in the axial direction from the flange portion 21 when the screw 4 is loosened. The screw 4 is prevented from being removed.

  Thereby, when the screw 4 is loosened, the nut plate 30 is reliably raised, and the fixing bracket 31 can be brought up.

  The nut plate 30 is inserted into the shaft hole portion 31 a of the fixing bracket 31 from the axial direction, and both ends of the nut plate 30 are supported by the guide rails 22. Thereby, the fixing bracket 31 does not need to form a groove or the like for attaching to the nut plate 30 in the shaft hole portion 31a, and the fixing bracket 31 can be prevented from being detached from the nut plate 30 during construction.

  Further, a drop prevention nut 41 is fastened to the tip of the screw 4 screwed into the nut plate 30. When the nut plate 30 is lifted by loosening the screw 4, the nut plate 30 may come off from the screw 4. This prevents the nut plate 30 and the fixture 31 from being detached from the grill body 2.

  14-16 is operation | movement explanatory drawing which shows the other example of installation of the ventilation grille of this Embodiment.

  As shown in FIG. 5 described above, by tightening the screws 4 in the direction in which the fixing bracket 31 is raised, the first rotation guiding portion 31c of the fixing bracket 31 hits the first action point 23a of the grill body 2. It is hit and pushed up. At this time, as shown in FIG. 14, when the inclination of the fixing bracket 31 reaches a predetermined amount, the fixing bracket 31 is turned into a nut as shown in FIG. 15 from the positional relationship between the weight of the fixing bracket 31 and the shaft hole portion 31a. There is a case where the plate 30 is turned toward the plate member 101 about the turning shaft and falls.

  Even in such a case, when the screw 4 is further tightened, the fixing bracket 31 is lowered while rotating as the nut plate 30 is lowered, so that the fixing bracket 31 has the pressing portion 31b as shown in FIG. The nut plate 30 is rotated about the rotation shaft while being in contact with the plate member 101, and the sandwiching notch 31 e enters the second action point 23 b of the grill body 2.

  Then, by further tightening the screw 4, as shown in FIG. 12, the clamping notch 31e of the fixing bracket 31 is abutted against the second action point 23b of the grill body 2, and the grill body 2 is connected to the flange portion 21. The plate member 101 is sandwiched between the fixing member 31 and the fixing member 31 and fixed to the plate member 101.

  The present invention is applied to a ventilation grill connected to a ventilation device or the like via a duct.

It is a block diagram which shows an example of the ventilation grill of this Embodiment. It is a block diagram which shows an example of the ventilation grill of this Embodiment. It is a block diagram which shows an example of the ventilation grill of this Embodiment. It is a block diagram which shows an example of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the example of installation of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the example of installation of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the example of installation of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the example of installation of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the example of installation of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the example of installation of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the example of installation of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the example of installation of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the example of installation of the ventilation grill of this Embodiment. It is operation | movement explanatory drawing which shows the other example of installation of the ventilation grille of this Embodiment. It is operation | movement explanatory drawing which shows the other example of installation of the ventilation grille of this Embodiment. It is operation | movement explanatory drawing which shows the other example of installation of the ventilation grille of this Embodiment.

Explanation of symbols

  1A ... ventilation grill, 2 ... grill body, 21 ... flange, 22 ... guide rail, 23a ... first action point, 23b ... second action point, 24. .. Hole part, 3... Fixing mechanism, 30... Nut plate, 31... Fixing bracket, 31 a... Shaft hole part, 31 b. Guide part, 31d ... second rotation guide part, 31e ... clamping notch part, 4 ... screw, 40 ... slip-off prevention washer, 41 ... slip-off prevention nut, 101 ... Board

Claims (5)

In ventilation grills attached to the ceiling or wall of a building,
A main body having a flange portion inserted into an opening formed in the plate material constituting the ceiling or wall and abutted against the plate material;
A guide portion standing on the flange portion;
A movable member guided and movable along the extending direction of the guide portion;
A screw member rotatably inserted into a hole formed in the flange portion and screwed into the movable member;
A fixed fitting that is formed with a shaft hole portion into which the movable member is inserted, and that is rotatably supported by a rotating shaft;
In accordance with the movement of the movable member, rotation guiding means that applies a force to the fixed bracket in a direction of rotating toward the plate member using the movable member as a rotation axis;
A ventilation grille comprising: a slip-off preventing member for restricting axial movement of the screw member. The rotation guiding means includes a first action point and a second action point standing on the flange portion, and
A first force is applied to the fixed bracket that is abutted against the first action point and rises with respect to the flange portion, and causes the movable member to rotate about a rotation axis in accordance with the movement of the movable member. When the fixed metal fitting is rotated in accordance with the movement of the rotation guide portion and the movable member, the movement of the movable member is converted into the rotation of the fixed metal hardware by being abutted against the second action point. The ventilation grill according to claim 1, wherein the fixing bracket is provided with a second rotation guiding portion formed of a curved surface. When the movable member is rotated to a position where the plate member is sandwiched between the fixing member and the flange portion in accordance with the movement of the movable member, the fixed fitting is abutted in the sandwiching direction of the plate member with respect to the second action point. The ventilation grill according to claim 1 or 2, further comprising a notch. The ventilation grill according to claim 1, 2, or 3, wherein the movable member inserted into the shaft hole portion of the fixing bracket is supported by the guide member at both ends protruding from the fixing bracket. . 5. A disconnection preventing fastening member that is fastened to a tip of the screw member screwed into the movable member and prevents the movable member from falling off the screw member. The described ventilation grill.

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