JPH0566448U - Electric shutter for rooftop ventilation fan - Google Patents

Abstract

(57) [Summary] [Purpose] A motor dedicated to opening and closing the shutter is provided separately from the main motor for rotating the fan, and the shutter is opened and closed while the main motor is stopped to provide natural ventilation and save energy. Plan. [Structure] A gear motor 8 for opening and closing a shutter is fixed to the outside of an exhaust pipe 2 of a rooftop ventilation fan, and a driving shaft includes an outer bearing 7, an inner bearing 14, and an exhaust pipe 2 which are concentrically provided in the exhaust pipe 2. 12 and the driven shaft 17, the driving shaft is connected to the geared motor 8, the fan-shaped gear fixed to the driving shaft 12 and the driven shaft 17 is meshed with the cylindrical gear 16, and the driving shaft 12 and the driven shaft 17 are connected to each other. ,
A shutter piece 19 having an arm 19a at its tip was fixed. [Effect] Naturally ventilate by opening and closing the shutter independently to save energy.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric shutter for a roof ventilation fan.

[0002]

[Prior Art]

 The shutter is opened and closed in conjunction with the main motor for rotating the fan of the rooftop ventilation fan, and there is no rooftop ventilation fan that has a motor dedicated to opening and closing the shutter independently of the main motor.

[0003]

[Problems to be solved by the device]

 Since the main motor for fan rotation is driven to open the shutter and perform forced ventilation, natural ventilation cannot be performed without driving the main motor. Also, when forced ventilation is used, indoor heat is dissipated to the outside air and the room temperature drops rapidly.

[0004]

[Means for Solving the Problems]

 In a rooftop ventilation fan that supports the main motor for fan rotation at the bottom of the exhaust stack and has a canopy that covers the upper part of the exhaust stack, centering the inner wall of the exhaust stack with multiple arms The base ends of the outer bearings are fixed to the bottom of the outer bearing, and the tips of each arm are fixed to the lower part of the outer wall of the outer bearing that is a bottomed cylindrical body. A gear motor for opening and closing the shutter is attached to the upper part, the crank disk is fixed to the drive shaft end, one end of the crank rod is connected to the eccentric position of the crank disk, and the drive shaft for opening and closing the shutter is the exhaust pipe. And the upper part of the wall of the outer bearing so as to be rotatable in the centripetal direction, and both ends of the drive shaft are projected to the outside of the exhaust pipe and the inside of the outer bearing, respectively, and to the outside of the exhaust pipe. The crank disk is fixed to the end of the driving shaft. The other end of the crank rod is connected to the eccentric position, the drive shaft is connected to the drive shaft of the geared motor through a crank mechanism, and the end of the drive shaft protruding inside the outer bearing is further rotated. A freely supporting cylindrical inner bearing is erected concentrically from the inner bottom surface of the outer bearing to the wall of the outer bearing, and a circular groove is formed on the inner bottom surface of the outer bearing surrounded by the outer bearing and the inner bearing. A cylindrical gear that is concentrically formed and has a rack on the upper surface of the cylindrical body is formed, and the lower part of the cylindrical gear is rotatably fitted in a circular groove, and a plurality of driven shafts are attached to the wall of the exhaust pipe and the outer bearing. Fan-shaped, which rotatably and horizontally rotatably extends over the wall of the inner bearing and the wall of the inner bearing, and meshes with the cylindrical gear at the shaft portions of the drive shaft and the driven shaft that are located between the outer bearing and the inner bearing Secure the gears individually and The shape of the ground paper formed by a part of the arc forming the exhaust stack, the space surrounded by the driving shaft and the driven shaft, and a space surrounded by the part of the arc forming the exhaust stack and the adjacent driven shaft. A plurality of shutter pieces are formed, each of which has a straight edge that overlaps with each other and seals the upper opening of the exhaust stack, and one shutter edge is fixed to the driving shaft or the driven shaft while the other is fixed to the other. It has a straightening hole on its straight edge and a straightening hole on the upper end of the exhaust stack.It is a shutter separate from the main motor for rotating the fan. By providing a motor for opening and closing, the shutter is opened and closed while the main motor is stopped, and the indoor air is ventilated with the outside air without naturally lowering the room temperature by naturally ventilating the rising hot airflow in the room. In addition, the purpose is to save energy. .

[0005]

[Action]

 When the gear motor for opening and closing the shutter is driven, it is connected to the drive shaft via a crank mechanism and is fixed to the drive shaft supported by the wall of the exhaust stack, the outer bearing and the inner bearing. The gear also rotates by a predetermined angle, the cylindrical gear that meshes with the fan-shaped gear also rotates by a predetermined angle, and the shutter piece fixed to the driving shaft and each driven shaft rises to open the upper opening of the exhaust cylinder, Alternatively, the shutter piece falls and closes the upper opening of the exhaust stack. In this way, the shutter is opened and closed electrically.

[0006]

【Example】

 As shown in FIGS. 1 to 5, a main motor 1 for rotating a fan is supported by an arm 3 at a lower portion of an exhaust stack 2, and a support column 4 is erected on a wall of the exhaust stack 2 for exhaust. In a rooftop ventilation fan in which a canopy 5 covering the upper part of a cylinder is supported by struts 4, a plurality of arms 6 are fixed to the inner wall of the central part of the exhaust stack 2 in the centripetal direction, and their base ends are fixed to form a bottomed cylinder. The tip of each arm 6 is fixed to the lower part of the outer wall of the outer bearing 7 which is a body, and the outer bearing 7 is supported at the center of the exhaust pipe 2, and the gear domo for opening and closing the shutter is mounted on the upper part of the outer wall of the exhaust pipe 2. A motor box 9 having a built-in motor 8 is attached, a crank disk 10 is fixed to the shaft end of its drive shaft 8a, and one end of a crank rod 11 is connected to an eccentric position of the crank disk 10 for opening and closing a shutter. In the centering direction across the wall of the exhaust stack 2 and the upper part of the wall of the outer bearing 7. It is horizontally movably mounted, and both ends of the drive shaft 12 are projected to the outside of the exhaust pipe 2 and the inside of the outer bearing 7, respectively, and the crank disk 13 is fixed to the end of the drive shaft 12 projected to the outside of the exhaust pipe 2. Then, by connecting the other end of the crank rod 11 to the eccentric position, the driving shaft 12 is connected to the drive shaft 8a of the geared motor 8 through the crank mechanism and to the inside of the outer bearing 7. A cylindrical inner bearing 14 that rotatably supports the protruding end of the driving shaft 12 is erected on the inner bottom surface of the outer bearing 7 concentrically with the wall of the outer bearing 7, and the outer bearing 7 and the inner bearing. A circular groove 15 is concentrically provided on the inner bottom surface of the outer bearing 7 surrounded by 14, and a cylindrical gear 16 having a rack 16a provided on the upper surface of the cylindrical body is formed, and the lower portion of the cylindrical gear 16 is formed into the circular groove 15. Freely rotatable The plurality of driven shafts 17 are fitted to each other, and the driven shafts 17 are radially and rotatably laid across the wall of the exhaust pipe 2, the wall of the outer bearing 7 and the wall of the inner bearing 14, and the outer bearing 7 and the inner bearing 14 The fan-shaped gears 18 meshing with the cylindrical gear 16 are fixed to the shaft portions of the drive shaft 12 and the driven shaft 17, which are located in the middle of, respectively, and a part of the arc forming the exhaust pipe 2 and the drive shaft 12 in plan view. And the driven shaft 17 and the space surrounded by the driven shaft 17 adjacent to a part of the arc forming the exhaust pipe 2, and the straight edges are overlapped with each other. Then, a plurality of shutter pieces 19 for sealing the upper opening of the exhaust pipe 2 are formed, and one straight edge-like base end side edge of each shutter piece 19 is fixed to the driving shaft 12 or the driven shaft 17. , Shutter piece A rectifying arm 19a for smoothly flowing the air flow passing over the surface of No. 9 as a flow with little turbulence is attached to the other edge of the shutter piece 19 on the leading edge side. , 20 are gear box lids which cover the outer bearing 7 and the inner bearing 14 respectively, and cover the cylindrical gear 16. Further, the upper part of the exhaust pipe 2 is also provided with an arm 2a for rectification.

FIG. 6 shows a state in which the shutter piece 19 is tilted down to close the upper opening of the exhaust stack 2, and FIG. 7 shows the shutter piece 19 standing up to open the upper opening of the exhaust stack 2 for natural ventilation. It shows the state.

[0008]

[Effect of the device]

 When the main motor 1 for rotating the fan is stopped and the geared motor 8 for opening and closing the shutter is driven, the drive shaft 12 rotates and the cylindrical gear 18 meshes with the fan-shaped gear 18 fixed to the drive shaft 12. 16 rotates, and the fan-shaped gears 18 that are integral with the driven shafts 17 meshing with the cylindrical gear 16 rotate, so that the shutter pieces 19 fixed to the drive shaft 12 and the driven shafts 17 rise and fall, and the main shutter of the shutter. The upper opening of the exhaust pipe 2 is opened or closed by single opening / closing without using the motor 1.

When the shutter piece 19 is opened, the indoor heat rising airflow is naturally ventilated to the outside air, and the room temperature in the house does not drop suddenly.

Further, energy is saved because the main motor 1 is not rotated.

Further, since each shutter piece 19 is provided with an arm 19a on the edge of the front end side, when the air flow passes over the surface of the shutter piece 19, the air flow is rectified to be an air stream with little turbulence. And exhaust the air smoothly.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 3 is a perspective view showing a driving shaft and a driven shaft supported by an outer bearing and an inner bearing according to an embodiment of the present invention;
FIG. 6 is a front view of a central portion showing a state in which a fan gear fixed to a driving shaft and a driven shaft are meshed with a cylindrical gear.

FIG. 4 is a perspective view of an embodiment of the present invention in which an outer bearing is supported by an arm, a driving arm is supported by an outer bearing and an inner bearing, and a fan gear fixed to a driving shaft is meshed with a cylindrical gear. The central part fracture | rupture front view which shows a state.

FIG. 5 is an explanatory diagram showing a main part of a shutter driving device according to an embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a central portion showing a shutter closed state according to an embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view of a central portion showing a shutter opened state in the embodiment of the present invention.

[Explanation of symbols]

1. Main motor 2. Exhaust stack
3.6. Arm 7. Outer bearing 8. Geared motor 10.
13. Crank disk 11. Crank rod 12. Driving shaft 14.
Inner bearing 15. Circular groove 16. Cylindrical gear 17.
Driven shaft 18. Fan gear 19. Shutter piece 19
a. Shear piece arm

Claims (2)

[Scope of utility model registration request] 1. A rooftop ventilation fan in which a main motor for rotating a fan is supported by a lower part of an exhaust stack and a canopy is provided to cover an upper part of the exhaust stack. The base ends of the outer bearings are fixed toward the centripetal direction, the tips of the arms are fixed to the lower part of the outer wall of the outer cylindrical bearing with a bottom, and the shutter open / close gear domo is fixed to the upper part of the outer wall of the exhaust stack. −
Mounted on the exhaust pipe and the upper part of the wall of the outer bearing so that the driving shaft is horizontally rotatably supported in the centering direction, and both ends of the driving shaft are projected to the outside of the exhaust pipe and the inside of the outer bearing, respectively. , The driving shaft end of the gear motor is connected to the driving shaft end projected to the outside of the exhaust stack via a crank mechanism, and the driving shaft end projected to the inside of the outer bearing is supported rotatably. A cylindrical inner bearing that is erected concentrically from the inner bottom surface of the outer bearing, and
A circular groove is concentrically formed on the inner bottom surface of the outer bearing surrounded by the outer bearing and the inner bearing, and a cylindrical gear having a rack on the upper surface is rotatably fitted in the circular groove to remove a plurality of driven shafts. Radially across the cylinder and the outer and inner bearings, and
A fan-shaped gear that rotatably extends horizontally and that meshes with a rack of cylindrical gears is fixed to the drive shaft and each driven shaft, and is surrounded by a part of the arc forming the exhaust pipe and the drive shaft and the driven shaft in plan view. A plurality of shutter pieces covering the space and part of the arc forming the exhaust pipe and the space surrounded by the adjacent driven shafts are formed, and the edge of each shutter piece is fixed to the driving shaft and the driven shaft. An electric shutter for a rooftop ventilation fan. 2. The electric shutter for a roof ventilator according to claim 1, wherein a shutter piece having a base end side edge fixed to the driving shaft and the driven shaft has an edge attached to the front end side edge.