JP2008014587A - Ventilation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation device capable of closing an inlet hole or an outlet hole with high airtightness and being simplified. <P>SOLUTION: This ventilation device 1 comprises a frame body 5 having a passage 4 provided with the rectangular inlet hole 2 and outlet hole 3 inside, a blade 6 constantly energized toward a passage opening position and rotatably disposed in the frame body 5 to close the passage 4 on the basis of airflow passing through the passage 4, a closing mechanism 8 closing the outlet hole 3 by moving the blade 6 toward the outlet hole 3, and a viscous damper 9 mounted on the blade 6 and providing the blade 6 with resistance against the rotation of the blade 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In order to ventilate the interior and the exterior of buildings such as office buildings, apartment houses, detached houses, warehouses, etc., the present invention is attached to the unoccupied part or the side plate part of these window sashes to reduce the degree of ventilation. It relates to a ventilator to be controlled.

JP 2003-21385 A

  For example, in Patent Document 1, a blade having an inlet hole and an outlet hole, which is rotatably arranged in a frame body, and which opens and closes the passage by rotation based on an air flow through the passage, and an outlet hole There has been proposed a ventilator including an openable / closable lid that opens and closes.

  By the way, in such a ventilator, since the openable / closable lid is provided separately from the blades, it is difficult to simplify the device. In such a ventilator, it is preferable that the inlet hole or the outlet hole can be closed with high airtightness.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a ventilator that can close an inlet hole or an outlet hole with high airtightness and can simplify the apparatus. It is in.

  The ventilator of the present invention has a frame body having a passage having an inlet hole and an outlet hole therein, and is constantly biased toward the passage opening position, and closes the passage based on the air flow through the passage. And a closing mechanism that closes the inlet hole or the outlet hole by moving the blade toward the inlet hole or the outlet hole. A shaft portion rotatably supported by the body and a pair of blade main body portions extending integrally from the shaft portion in the radial direction are provided, and a tip portion of the blade main body portion passes through the passage. The blade is curved so as to generate a rotation moment in the blade toward the passage closing position by the air flow, and the closing mechanism includes a moving mechanism that moves the blade toward the inlet hole or the outlet hole, and an inlet hole of the blade by the moving mechanism or In moving towards the exit hole Forcibly rotating means for forcibly rotating the blade so that the tip of the blade body on the inlet hole or outlet hole side is located on the front side or the rear side of the inlet hole or outlet hole. The rotating means is attached to the protrusion formed on the frame body and the blade, and the tip of the blade body on the inlet hole or outlet hole side is located on the front side or the rear side of the inlet hole or outlet hole. And a blade member on the inlet hole or outlet hole side by sliding on the protrusion of the sliding member in the movement toward the inlet hole or outlet hole of the blade by the moving mechanism. The blades are forcibly rotated so that the front end portion is positioned on the front side or the rear side of the inlet hole or the outlet hole.

  According to the ventilator of the present invention, in particular, when the moving mechanism moves toward the inlet hole or outlet hole of the blade, the tip of the blade body on the inlet hole or outlet hole side is in front of the inlet hole or outlet hole. Alternatively, since the above-mentioned forced rotation means for forcibly rotating the blade so as to be located on the rear side is provided, the constant air volume control of the air flow is performed by the blade that opens and closes the passage by rotation based on the air flow passing through the passage. The inlet hole or the outlet hole can be forcibly closed with high airtightness using the blade, and the apparatus can be simplified.

  In a preferred example of the ventilator according to the present invention, the moving mechanism is a rotating member that is rotated when a rotational force is applied, and is rotatably supported on the frame body on the one hand and is rotatable on the shaft portion of the blade on the other hand. A rotatable member that moves the blade toward the inlet hole or the outlet hole by rotation about the rotation axis on one side so as to close the inlet hole or the outlet hole on the blade; In order to transmit the rotation to the rotatable member, a transmission member is rotatably connected to the rotating member on the one hand and is rotatably connected to the rotatable member on the other hand.

  In a preferred example of the ventilation device of the present invention, the rotating member or the transmission member is configured to prevent the rotation member and the transmission member from rotating each other by a predetermined amount or more so as to keep the blade closed in the inlet hole or the outlet hole. And a blocking piece secured to the.

  In a preferred example of the ventilation device of the present invention, the blocking piece has a rotation axis of the transmission member relative to the rotating member on one side of the rotating member with respect to the rotation direction of the rotating member when moving the blade toward the inlet hole or the outlet hole. When it is located on one side beyond the line connecting the rotation axis of the transmission member and the rotation axis of the transmission member with respect to the rotatable member, it contacts the transmission member or the rotation member. According to the blocking piece as described above, the closed state of the inlet hole or the outlet hole by the blade can be reliably maintained releasably.

  In a preferred example of the ventilator according to the present invention, it is further provided with a biasing means having a weight provided on the blade, and the blade is rotated toward the passage opening position by its own weight. It is always energized. According to such a preferable example, the constant air volume control of the air flow by the blades can be performed more suitably.

  In a preferred example of the ventilator of the present invention, the blade main body positioned below the shaft portion of the pair of blade main body portions when the blade is in the passage open position so as to be constantly biased toward the passage open position. The weight on the part side is heavier than the weight on the blade body part side located above the shaft part of the pair of blade body parts when the blade is in the passage opening position.

  In a preferred example of the ventilator according to the present invention, the ventilation device is further provided with a resistance applying means that is attached to the blade and applies a resistance force against the rotation of the blade to the blade. According to such a preferable example, rapid rotation of the blade is not caused, halation and galloping can be prevented, and constant air volume control by the blade can be performed more suitably.

  According to the present invention, it is possible to provide a ventilation device that can close the inlet hole or the outlet hole with high airtightness and can simplify the device.

  Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

  1 to 6, a ventilation device 1 of this example installed on a building wall includes a frame 5 having a passage 4 having a rectangular inlet hole 2 and an outlet hole 3 therein, and (b) of FIG. ) And a blade 6 that is always urged toward the passage opening position shown in FIG. 5 and that is rotatably arranged in the frame 5 so as to close the passage 4 based on the air flow through the passage 4. The inlet hole 2 or the outlet hole 3, in this example, the closing mechanism 8 that closes the outlet hole 3 by moving toward the outlet hole 3, and the resistance force that is attached to the blade 6 and resists rotation of the blade 6. Is provided with a viscous damper 9 as a resistance applying means for applying a force to the blade 6 and a biasing means 7 having a weight 51 provided on the blade 6.

  For example, as shown in FIG. 2 (b), the entrance hole 2 is arranged downward and the exit hole 3 is arranged upward, the entrance hole 2 is opened outside the building, and the exit hole 3 is formed in the building. Open inside. At the opening edge of the outlet hole 3, an elastic sealing material 11 that abuts against the blade 6 when the outlet hole 3 is closed is provided. A dust-proof net, a bird-proof net, or the like may be attached to the frame 5 on the outlet hole 3 side. The air introduced from the inlet hole 2 is led out from the outlet hole 3 through the passage 4.

  The frame 5 is opposed to each other in the front-rear direction Y, and cooperates with each other to define the inlet hole 2 and the outlet hole 3, and the front frame 21 and the rear frame 22. Plate-like side wall plates 23 and 24 fixed to both ends in the axial direction X. The axial direction X is orthogonal to the front-rear direction Y. In this example, the passage 4 extends in the vertical direction, and the blades 6 extend in the substantially vertical direction in the passage open state shown in FIG. 2B, and in the passage closed position shown in FIG. It is arranged extending in a substantially horizontal direction.

  The blade 6 includes a shaft portion 31 extending in the axial direction X rotatably supported by the side wall plates 23 and 24, and a pair of blade body portions 32 and 33 extending integrally from the shaft portion 31 in the radial direction. The tip portions 34 and 35 of the blade main body portions 32 and 33 have a rotational moment from the passage open position to the passage closed position by the air flow passing through the passage 4, that is, a rotational moment in the B direction to the blade 6. Curved to produce.

  One surface 41 of the blade main body 32 in the front end portion 34 and the vicinity thereof is curved so as to be convex toward the rear frame 22 in FIG. 2B, and the other surface 42 is in FIG. In (b), it is curved to be concave toward the front frame 21. One surface 43 of the tip 35 and the blade body 33 in the vicinity thereof is curved so as to be convex toward the rear frame 22 in FIG. 2B, and the other surface 44 is illustrated in FIG. In (b) of FIG. 2, it is curved so as to be concave toward the front frame 21. The curved shapes of the blade main bodies 32 and 33 in the vicinity of the tip portions 34 and 35 and the vicinity thereof are such that when an air flow from the inlet hole 2 to the outlet hole 3 is generated in the passage 4 in the opened state of the passage 4 by the blade 6. The blade main body portion 32 generates lift toward the rear frame 22, and the blade main body portion 33 generates lift toward the front frame 21, and the blade 6 is shown in FIG. 3B by a rotational moment based on this lift force. It is rotated so as to be directed to the passage closing position, that is, in the B direction.

  In the blade 6, the rotational positions in the A and B directions are determined in accordance with the magnitude of the air flow from the inlet hole 2 toward the outlet hole 3 in the passage 4. When the blade 6 is rotated in the B direction against the rotational force in the A direction due to the weight of the weight 51 of the urging means 7 due to a large air flow from the inlet hole 2 to the outlet hole 3 in the passage 4. As shown in FIG. 3 (b), when the passage 4 is closed and such a large air flow stops flowing into the passage 4, it is rotated in the direction A by the dead weight of the weight 51, and the magnitude of the air flow. For example, as shown in FIG. 2 (b), the passage 4 is opened at the rotational position corresponding to. By the rotation of the blade 6 based on such an air flow, constant air flow control of the air flow flowing through the passage 4 from the inlet hole 2 toward the outlet hole 3 can be performed.

  The biasing means 7 includes a weight 51 that is fixed to one end of the shaft portion 31 via a sliding contact member 72 that will be described later, and that applies a rotational force in the A direction toward the passage opening position to the blade 6 by its own weight. ing. The blade 6 is constantly urged so as to be rotated from the passage closed position toward the passage open position by the dead weight of the weight 51, that is, rotated in the A direction. The weight 51 is attached to a shaft 52 fixedly connected to the sliding member 72. The shaft 52 extends in a direction orthogonal to the axial direction X.

  The weight 51 is rotated around the shaft portion 31 based on the rotation of the blade 6 in the A and B directions. As shown in FIG. 3 (a), when the weight 51 is arranged side by side with the shaft portion 31 in the substantially horizontal direction, the rotational force in the A direction applied to the blade 6 is large, as shown in FIG. 2 (a). When the weight 51 is disposed below the shaft portion 31 in the substantially vertical direction, the rotational force in the A direction applied to the blade 6 is small, and from the position where the weight 51 is disposed side by side with the shaft portion 31 in the vertical direction. When it is gradually rotated toward the position arranged side by side with the shaft portion 31 in the horizontal direction, the rotational force in the A direction gradually increases with the rotation.

  The biasing means 7 can adjust the rotational force in the A direction toward the passage opening position generated in the blade 6 as desired by changing the mounting position of the weight 51 with respect to the shaft 52 in the longitudinal direction of the shaft 52. It has become. The urging means 7 increases the rotational force in the A direction toward the passage opening position generated in the blade 6 by separating the weight 51 from the sliding member 72 and mounting it on the shaft 52, and also slides the weight 51. The rotational force in the A direction toward the passage opening position generated in the blade 6 can be reduced by approaching the contact member 72 and mounting it on the shaft 52. Further, the rotational force in the A direction toward the passage opening position generated in the blade 6 can also be adjusted by increasing or decreasing the number of weights 51.

  The closing mechanism 8 includes a moving mechanism 55 that moves the blade 6 toward the outlet hole 3, and movement of the blade 6 toward the outlet hole 3 of the blade 6 by the moving mechanism 55. Forcibly rotating means 56 for forcibly rotating the blades 6 so as to be located on the front side or the rear side of the outlet hole 3 in this example, the front side is provided.

  The moving mechanism 55 is rotatably supported on the frame 5 at one end 62 in the present embodiment, while the rotating arms 61 and 61a are rotating members that are rotated when a rotational force is applied by the operation of the handle 69 described later. On the other hand, in this example, the other end 63 is rotatably connected to the shaft portion 31 of the blade 6, and the blade 6 is rotated in the R1 direction around the one end 62 so as to close the outlet hole 3. The rotatable arms 64 and 64a as rotatable members for moving the blade 6 toward the outlet hole 3 and the rotation arms 61 and 61a are transmitted to transmit the rotation of the rotation arms 61 and 61a to the rotatable arms 64 and 64a. Transmission arms 65 and 65a as transmission members connected to the rotatable arms 64 and 64a, and the moving direction of the other end 63 of the rotatable arms 64 and 64a, A guide groove 68 extending in a row and formed in each of the side wall plates 23 and 24 and through which the shaft portion 31 of the blade 6 is inserted and guides the movement of the shaft portion 31 due to the rotation of the rotatable arms 64 and 64a, respectively. 68a, a handle 69 attached to the rotary arm 61a and rotating the rotary arm 61a by operation, and a rotary shaft 70 extending in the axial direction X fixed to the rotary arms 61 and 61a at both ends. ing. The rotation of the rotary arm 61 a is transmitted to the rotary arm 61 via the rotary shaft 70.

  In addition to the above-described configuration, the closing mechanism 8 is provided between the rotary arms 61 and 61a and the transmission arms 65 and 65a in order to maintain the state where the blades 6 close the outlet hole 3 by the rotation of the rotatable arms 64 and 64a. Rotating arms 61 and 61a or transmission arms 65 and 65a, in this example, blocking pieces 67 and 67a fixed to the transmission arms 65 and 65a are provided so as to prevent mutual rotation beyond a predetermined amount.

  The rotary arm 61, the rotatable arm 64, the transmission arm 65, the blocking piece 67 and the guide groove 68 are formed in the same manner as the rotary arm 61a, the rotatable arm 64a, the transmission arm 65a, the blocking piece 67a and the guide groove 68a, respectively. Therefore, hereinafter, the rotating arm 61, the rotatable arm 64, the transmission arm 65, the blocking piece 67 and the guide groove 68 will be described in detail, and the rotating arm 61a, the rotatable arm 64a, the transmission arm 65a, the blocking piece 67a and the guiding groove 68a. For the above, reference numeral a is appropriately attached to the figure, and detailed description thereof is omitted.

  The rotary arm 61 is connected to the handle 69 at one end (one side) and is connected to the transmission arm 65 at the other end (the other side). The rotary arm 61 is rotated in the R3 and R4 directions around the rotation axis on one end (one side) of the rotary arm 61 by the operation of the handle 69. The transmission arm 65 is rotatably connected to the rotating arm 61 at one end (one side) and is rotatably connected to the rotatable arm 64 at the other end (the other side). The rotatable arm 64 is longer than the rotating arm 61 and is disposed above the rotating arm 61. The rotating arm 61 and the transmission arm 65 are rotated in the R3 direction of the rotating arm 61 from the state shown in FIGS. 2A and 2B to the state shown in FIGS. As shown in (a) and (b), it is shown in (a) and (b) of FIG. 4 from the state shown in (a) and (b) of FIG. 5 by the rotation of the rotating arm 61 in the R4 direction. 2A and 2B, the rotatable arm 64 is rotated in the R1 direction by the extension, and is rotated in the R2 direction by the folding. It has become.

  The blocking piece 67 fixed to one end of the transmission arm 65 is such that the rotation axis of the transmission arm 65 with respect to the rotation arm 61 and the rotation arm 61 on the one end side of the rotation arm 61 and the rotation arm 64 of the transmission arm 65 with respect to the rotatable arm 64 in the R3 direction. When the rotary arm 61 and the transmission arm 65 are extended when the rotary arm 61 and the transmission arm 65 are extended when the rotary arm 61 and the transmission arm 65 are located on one side of the line beyond the line connecting the rotation axis and in this example, the front side. Thus, the rotation arm 61 and the transmission arm 65 are prevented from rotating by a predetermined amount or more. The blocking piece 67 abuts against the other end of the rotating arm 61 so as not to rotate the rotating arm 61 in the R3 direction due to the rotational force in the R2 direction applied from the blade 6 to the rotatable arm 64. When the rotation axis of the transmission arm 65 with respect to the rotation arm 61 is positioned forward of the line connecting the rotation axis of one end of the rotation arm 61 and the rotation axis of the transmission arm 65 with respect to the rotatable arm 64, Depending on the rotational force in the R2 direction applied from the blades 6 to the rotatable arm 64, only the rotational force in the R3 direction is applied to the rotational arm 61. Therefore, the rotational arm 61 in the R3 direction due to the rotational force in the R3 direction is applied. By preventing the rotation by the blocking piece 67, the rotation of the rotatable arm 64 in the R2 direction can be blocked, and thus the closed state of the outlet hole 3 by the blade 6 can be maintained. Further, depending on the rotational force generated by the operation of the handle 69, the rotary arm 61 rotates in the R4 direction and is separated from the blocking piece 67, and the rotary arm 61 and the transmission arm 65 are folded. Thus, the closed state of the outlet hole 3 by the blade 6 is released.

  The forced rotation means 56 is attached to the projection 71 formed on the side wall plate 23 and the shaft portion 31 of the blade 6 in the side wall plate 23, and the tip end portion 35 of the blade main body portion 33 on the outlet hole 3 side is connected to the outlet hole. 3 and a sliding contact member 72 having an L-shaped cross section that is in sliding contact with the protrusion 71 so as to be disposed on the front side or the rear side, in this example, on the front side. The tip 35 of the blade body 33 is more than the outlet hole 3 while regulating the inclination angle of the blade 6 with respect to the B direction by sliding contact with the projection 71 of the sliding member 72 in the movement in the R1 direction toward the outlet hole 3. The blade 6 is forcibly rotated in the A direction so as to be positioned on the front side. The protrusion 71 includes a rotating roller 81 fixed to the side wall plate 23. The sliding member 72 has a contact edge 82 that contacts the rotating roller 81.

  In this example, the handle 69 is used as means for applying a rotational force to the rotary arms 61 and 61a. However, instead of this, for example, an electric motor (not shown) may be used. The closing mechanism 8 is disposed on the exit hole 3 side, for example, instead of the moving mechanism 55, for example, guide grooves 68 and 68a, a wire rope (not shown) fixed to the shaft portion 31 of the blade 6 and the outlet hole 3. In addition, a moving mechanism including a winding device that winds the wire rope so as to move the blade 6 toward the outlet hole 3 may be provided.

  The viscous damper 9 is attached to the shaft portion 31 of the blade 6 on the side wall plate 24 side, and gives a viscous resistance force against the rotation of the blade 6 in the A and B directions. It is designed to prevent rapid rotation.

  The viscous damper 9 may be a bidirectional damper, or may be a unidirectional damper that generates a viscous resistance force that opposes any one of the A and B directions of the blades.

  In the case of performing constant air volume control of the air flow by the ventilation device 1 of this example, the rotating arms 61 and 61a are rotated in the R4 direction by manual operation of the handle 69, and by this rotation, the rotating arms 61 and 61a and the transmission arm 65 and The rotatable arms 64 and 64a are rotated in the R2 direction while folding 65a, and the blade 6 in a state where the outlet hole 3 is closed by this rotation is separated from the outlet hole 3, and the blade 6 is moved to the front frame 21 and the rear frame. In this state, the shaft portion 31 is rotatably supported by the frame body 5 so as not to contact 22. If the blades 6 are arranged in this way, they are rotated in the A and B directions as shown in FIGS. 2B and 3B depending on the size of the air flow introduced from the inlet hole 2. To control the constant air flow. For such rotation of the blade 6 in the A and B directions, since the viscous resistance force is given by the viscous damper 9, the blade 6 does not rapidly rotate in the A and B directions. Air volume control can be performed more suitably.

  When the outlet hole 3 is closed by the ventilation device 1 of this example, the rotating arms 61 and 61a are rotated in the R3 direction by manual operation of the handle 69, and the rotating arms 61 and 61a and the transmission arms 65 and 65a are rotated by this rotation. The rotatable arms 64 and 64a are rotated in the R1 direction while being extended, and the blade 6 is moved toward the outlet hole 3 while the shaft portion 31 is guided to the guide grooves 68 and 68a by this rotation. During the movement, the sliding contact member 72 fixed to the shaft portion 31 rotates in the A direction around the shaft portion 31 while sliding with respect to the protrusion 71. As a result, the blade 6 is also forcibly rotated in the direction A by the rotational force applied from the sliding contact member 72, and the tip end portion 35 is disposed on the front side of the outlet hole 3. In this way, the blade 6 is moved toward the outlet hole 3 and is brought into contact with the outlet hole 3 to close the outlet hole 3. Since the front end portion 35 of the blade main body portion 33 is positioned in front of the outlet hole 3, for example, the blade 6 is moved toward the outlet hole 3 while extending in a substantially vertical direction, and the front end portion 35 is moved to the outlet. The exit hole 3 can be reliably closed by the blade 6 without causing a situation of being caught in the hole 3. When the blade 6 closes the outlet hole 3, the rotation axis of the transmission arm 65 with respect to the rotation arm 61 connects the rotation axis of one end of the rotation arm 61 and the rotation axis of the transmission arm 65 with respect to the rotatable arm 64. When the outlet hole 3 is closed by the blade 6, the blocking pieces 67 and 67a abut against the other ends of the rotary arms 61 and 61, and the transmission arm 65a is a rotary shaft for the rotary arm 61a. When the center is located in front of the line connecting the rotation axis of one end of the rotation arm 61a and the rotation axis of the transmission arm 65a with respect to the rotatable arm 64a, and the outlet hole 3 is blocked by the blade 6, blocking The pieces 67 and 67a are in contact with the other ends of the rotary arms 61 and 61a, and are subjected to the rotational force in the R2 direction applied to the rotatable arms 64 and 64a via the blades 6 by the air flow. What is in a state of rotating arms 61 and 61a and the transmission arm 65 and 65a are unfolded.

  According to the ventilator 1 of this example, the frame 5 having the passage 4 having the inlet hole 2 and the outlet hole 3 therein, and the air flow through the passage 4 are always urged toward the passage opening position. The blade 6 is rotatably arranged in the frame 5 so as to close the passage 4 and the blade 6 is moved toward the inlet hole 2 or the outlet hole 3, in this example, the outlet hole 3. A closing mechanism 8 that closes the outlet hole 3, and the blade 6 is integrally extended in the radial direction from the shaft portion 31 that is rotatably supported by the frame body 5. A pair of blade body portions 32 and 33, and the tip portions 34 and 35 of the blade body portions 32 and 33 generate a rotational moment in the blade 6 toward the passage closed position by the air flow passing through the passage 4. In this example, the closing mechanism 8 In the moving mechanism 55 that moves toward the mouth hole 3 and the movement of the blade 6 toward the outlet hole 3 by the moving mechanism 55, the tip end portion 35 of the blade body 33 on the outlet hole 3 side is on the front side of the outlet hole 3. Force rotating means 56 for forcibly rotating the blade 6 so as to be located at the position, and the forced rotating means 56 is attached to the projection 71 formed on the frame body 5 and the blade 6, and the outlet And a sliding contact member 72 that slides against the projection 71 so that the tip 35 of the blade body 33 on the side of the hole 3 is positioned in front of the outlet hole 3. Due to the sliding contact with the protrusion 71 of the sliding contact member 72 in the movement toward the hole 3, the blade 6 is forcibly positioned so that the tip 35 of the blade body 33 on the outlet hole 3 side is positioned in front of the outlet hole 3. It is supposed to rotate Furthermore, the constant air volume control of the air flow can be performed by the blade 6 that opens and closes the passage 4 by rotation based on the air flow through the passage 4, and the outlet hole 3 is forcibly closed with high airtightness using the blade 6. In addition, the apparatus can be simplified.

  According to the ventilation device 1, the moving mechanism 55 includes rotating arms 61 and 61 a that are rotated by applying a rotational force, one end 62 is rotatably supported by the frame body 5, and the other end 63 is a blade 6. A rotatable arm that is rotatably connected to the shaft portion 31 and moves (rotates) the blade 6 toward the outlet hole 3 by rotating around the one end 62 so that the blade 6 closes the outlet hole 3. 64 and 64a, and the rotation of the rotary arms 61 and 61a are rotatably connected to the rotary arms 61 and 61a at one end and to the rotary arms 64 and 64a at the other end in order to transmit the rotation of the rotary arms 61 and 61a to the rotary arms 64 and 64a. Transmission arm 65 and 65a are connected so that rotation is possible, and blockade mechanism 8 has rotation arms 64 and 6 in order to maintain the state where blade 6 closed outlet hole 3. a rotation piece 61 and 61a or blocking pieces 67 and 67a fixed to the transmission arms 65 and 65a so as to prevent the mutual rotation of a and the transmission arms 65 and 65a by a predetermined amount or more. And 67a, the rotation axis of the transmission arms 65 and 65a with respect to the rotation arms 61 and 61a is the rotation axis of one end of the rotation arms 61 and 61a and the rotation of the transmission arms 65 and 65a with respect to the rotatable 64 and 64a with respect to the R3 direction. When it is located in front of the line beyond the line connecting the shaft center, it contacts the transmission arms 65 and 65a or the rotating arms 61 and 61a. The closed state can be reliably maintained releasably.

  According to the ventilation device 1, the urging means 7 including the weight 51 provided on the blade 6 is further provided, and the blade 6 rotates toward the passage opening position by the weight of the weight 51. Thus, the constant air volume control of the air flow by the blades 6 can be more suitably performed.

  According to the ventilation device 1, since the blade 6 is further equipped with the viscous damper 9 as a resistance force imparting unit that is attached to the blade 6 and imparts a resistance force against the rotation of the blade 6 to the blade 6. 6 can be prevented from causing rapid rotation, and halation and galloping can be prevented, so that the constant air volume control by the blades 6 can be performed more suitably. The ventilation device 1 includes a viscous damper 9 that applies a viscous resistance force to the blade 6 as a resistance force applying unit. Instead, for example, a frictional resistance force that resists the rotation of the blade 6 is provided. 6 may be provided, which can prevent galloping.

  In addition, when the blade | wing 6 exists in a channel | path open position, when the blade | wing 6 exists in a channel | path open position, the blade | wing main body part 32 side located below the axial part 31 of a pair of blade | wing main body parts 32 and 33 is provided. The weight of the blade body 6 may be heavier than the weight of the blade body portion 33 side positioned above the shaft portion 31 of the pair of blade body portions 32 and 33 when the blade 6 is in the passage opening position. As a means for making the weight on the blade body portion 32 side heavier than the weight on the blade body portion 33 side, for example, the center of gravity position of the blade 6 is closer to the blade body portion 32 side than the rotational axis of the blade 6. Means for decentering the shaft portion 31 of the blade 6, means for changing the shape of the blade body portion 32 so that the weight of the blade body portion 32 is heavier than the weight of the blade body portion 33, and a weight inside the blade body portion 32 There is a means to provide.

It is explanatory drawing seen from the front of the example of embodiment of this invention. (A) is explanatory drawing seen from the one side surface of the example shown in FIG. 1, (b) is explanatory drawing which abbreviate | omitted the side wall board mainly in the said (a). (A) And (b) is operation | movement explanatory drawing of the example shown in FIG. (A) And (b) is operation | movement explanatory drawing of the example shown in FIG. (A) And (b) is operation | movement explanatory drawing of the example shown in FIG. (A) is explanatory drawing seen from the other side surface of the example shown in FIG. 1, (b) is explanatory drawing which abbreviate | omitted the side wall board mainly in the said (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ventilator 2 Inlet hole 3 Outlet hole 4 Passage 5 Frame body 6 Blade | wing 7 Energizing means 8 Closure mechanism 9 Viscous damper 55 Moving mechanism 56 Forced rotation means

Claims (7)

  A frame body having a passage having an inlet hole and an outlet hole therein, and is constantly urged toward the passage opening position, and is rotatable in the frame body so as to close the passage based on an air flow through the passage. And a closing mechanism that closes the inlet hole or the outlet hole by moving the blade toward the inlet hole or the outlet hole, and the blade is rotatably supported by the frame body. And a pair of blade main body portions extending integrally from the shaft portion in the radial direction, and the tip end portion of the blade main body portion is placed at the passage blocking position by the air flow passing through the passage. It is curved so as to generate a rotational moment toward the blade, and the closing mechanism includes a moving mechanism that moves the blade toward the inlet hole or the outlet hole, and a movement by the moving mechanism toward the inlet hole or the outlet hole of the blade. Inlet hole or outlet hole side Forcibly rotating means for forcibly rotating the blade so that the tip of the blade main body is positioned in front of or behind the inlet hole or outlet hole. The formed protrusions and the slides that are attached to the blades and that slide on the protrusions so that the tip of the blade body on the inlet hole or outlet hole side is located on the front side or the rear side of the inlet hole or outlet hole. And the tip of the blade body on the inlet hole or outlet hole side is brought into contact with the inlet hole by sliding contact with the protrusion of the sliding member in the movement toward the inlet hole or outlet hole of the blade by the moving mechanism. Or the ventilation apparatus which rotates a blade | wing forcibly so that it may be located in the front side or back side rather than an exit hole.   The moving mechanism is a rotating member that is rotated when a rotational force is applied thereto, and is rotatably supported on the frame body on the one hand and is rotatably connected to the shaft portion of the blade on the other hand, Alternatively, a rotatable member that moves the blade toward the inlet hole or the outlet hole by rotation about the rotation axis on one side to close the outlet hole, and to transmit the rotation of the rotating member to the rotatable member, The ventilation device according to claim 1, further comprising: a transmission member that is rotatably connected to the rotating member on the one hand and is rotatably connected to the rotatable member on the other hand.   In order to maintain the state in which the blade closes the inlet hole or the outlet hole, the blade further includes a blocking piece fixed to the rotating member or the transmission member so as to prevent the rotation member and the transmission member from rotating relative to each other by a predetermined amount or more. The ventilation apparatus according to claim 2.   In the blocking piece, the rotation axis of the transmission member with respect to the rotation member is freely rotatable between the rotation axis on one side of the rotation member and the transmission member with respect to the rotation direction of the rotation member when moving the blade toward the inlet hole or the outlet hole. The ventilator according to claim 3, wherein the ventilation device comes into contact with the transmission member or the rotating member when positioned on one side of the line beyond the line connecting the rotation axis to the member.   Further provided is a biasing means having a weight provided on the blade, and the blade is constantly biased so as to rotate toward the passage opening position by its own weight. The ventilator according to any one of claims 1 to 4.   When the vane is in the passage open position, the weight on the blade main body side located below the shaft portion of the pair of blade main bodies when the vane is in the passage open position is always open to the passage opening position. The ventilator according to any one of claims 1 to 5, wherein the ventilator is heavier than a weight of a blade main body portion located above the shaft portion of the pair of blade main body portions when in the position.   The ventilator according to any one of claims 1 to 6, further comprising a resistance applying means that is attached to the blade and applies a resistance force against the rotation of the blade to the blade.

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