JP2008128591A - Roof fan for exhaust - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase an exhaust air amount by increasing an opening angle of a shutter. <P>SOLUTION: Each of left and right tabular shutters 7, 8 in the shutter 6 of a butterfly type is segmented into inner sides 7a, 8b, and outer sides 7b, 8b from a center part. Portions of the inner sides 7a, 8a, and the outer sides 7b, 8b are connected by hinges 9, 9 to expand and contract, and they are constantly energized to extend by a spring 10 having suitable elastic force. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an exhaust roof fan installed on a rooftop.

  Conventionally, as one of the exhaust roof fans installed on the rooftop, a cylindrical body that is open at the top and bottom, a fan that is disposed inside the body and is rotated by a motor, and a shutter that is mounted on the upper open portion of the body A pair of left and right plate shutters attached with a frame, and a butterfly shutter that rotates simultaneously in the vertical direction around a pivot on which the outer free end is pivotally attached to the base, and a predetermined amount above the body An exhaust roof fan is used, which is composed of a canopy hood that is mounted with an interval and is turned upside down.

  However, such an exhaust roof fan has the following problems. This is because in the situation where the distance from the body of the canopy hood has to be lowered due to the necessity of preventing the inflow of rainwater, etc., the left and right plate shutters in the butterfly shutter are flat single plates, respectively. When each of the plate shutters is flipped up by the wind pressure due to the rotation of the fan to open the air passage, the opening angle is small and a large exhaust air volume cannot be obtained.

  The present invention has been made in view of the above points, and each of the left and right plate shutters in a butterfly shutter is divided into an inner side and an outer side from a central part, and these inner and outer parts bend and stretch. It is connected with a hinge so that it can be urged, and is energized so as to always extend with a spring having an appropriate elasticity, so that when the left and right plate shutters are flipped up by wind pressure, they are bent and opened from the center. It is an object of the present invention to provide an exhaust roof fan that can increase the angle.

  Thus, the gist of the present invention is that a cylindrical body having an open top and bottom, a fan disposed inside the body and rotated by a motor, and a shutter mounting frame at an upper open portion of the body. A butterfly shutter that consists of a pair of left and right plate-shaped shutters that are attached, and the outer free end side pivots simultaneously around a pivot that pivotally attaches to the base, and a predetermined interval above the body. In the exhaust roof fan comprising the canopy hood with the dish turned upside down, the left and right plate shutters in the butterfly shutter are respectively positioned at a substantially central portion between the base and the free end. It is divided into an inside and an outside, and the joint is connected flexibly with a hinge, and always has a spring with appropriate elasticity. Building so in exhaust roof fan, characterized in that the biasing on.

  In addition, regarding the hinge and spring used in the above configuration, the hinge is inserted in a skewered manner with the connecting shaft inserted in a staggered manner in which the portions of the pair of rotating pieces projecting obliquely downward are staggered, and the pair of rotating pieces The upper surface of each of the hinges is fixed to the lower surface of the plate-like shutter, and the spring is bent so that the center portion is annular, and the connecting shaft of the hinge is inserted into the annular portion. It is preferable that the spring is formed by bending the end portion extending in the opposite direction into a U-shape and bringing it into contact with the lower surface of the plate shutter.

  Moreover, in the said structure, it is preferable to attach a shock absorbing material to the appropriate location which the plate-shaped shutter in the inner surface of a canopy hood contacts. Thereby, when it is flipped up by wind pressure, it is possible to prevent damage caused by the outer portion of the plate-like shutter being strongly hit or rubbed.

  The present invention is configured as described above, and each of the left and right plate shutters in the butterfly shutter is divided into an inner side and an outer side from the central part, and the inner and outer parts can be bent and stretched. Are connected to each other and urged so as to always extend with a spring having an appropriate elasticity, so that when the left and right plate-shaped shutters are flipped up by wind pressure, they are bent and opened from the center. The angle can be increased. Therefore, the exhaust air volume can be greatly increased as compared with the conventional exhaust roof fan.

  In addition, when a cushioning material is attached to an appropriate location on the inner surface of the canopy hood where the plate shutter comes into contact, the outer portion of the plate shutter hits or rubs strongly when it is bounced up by wind pressure. Damage due to the damage can be prevented.

  The best mode for carrying out the present invention is to divide each of the left and right plate shutters in the butterfly shutter from the central part to the inner side and the outer side so that the inner and outer parts can bend and stretch. It is connected with a hinge and biased so as to always extend with a spring having an appropriate elasticity.

Examples of the present invention will be described below.
1 is a front view of a central longitudinal section of an embodiment of the present invention, FIG. 2 is an enlarged view of a portion A in FIG. 1, FIG. 3 is a plan view showing a part of the embodiment of the present invention, and FIG. 5 is an enlarged view of a portion B in FIG. 5, FIG. 5 is an enlarged view of a base pivoting portion of the plate shutter, FIG. 6 is a plan view of a hinge and spring for bending and stretching the plate shutter, and FIG. 7 is an opening / closing operation of the plate shutter. It is explanatory drawing.

  In the figure, reference numeral 1 denotes a cylindrical body whose top and bottom are open. A fan 2 is disposed inside the body 1 and is rotated by a motor 3.

  Reference numeral 4 denotes a shutter mounting frame fixed to the upper open portion of the body 1. Further, the shutter mounting frame 4 has a frame portion 4 a that is an exhaust path connected to the open portion of the body 1. In addition, a cushioning material 5 is attached at an appropriate position on the top of the frame portion 4a. A butterfly shutter 6 is attached to the upper open portion of the body 1 with the shutter mounting frame 4. The butterfly shutter 6 is composed of a pair of left and right plate shutters 7 and 8 and simultaneously rotates in the vertical direction with a pivot shaft as a fulcrum on which the outer free end side pivots the base. In this embodiment, each of the plate shutters 7 and 8 is divided into an inner side 7a, 8a and an outer side 7b, 8b at a substantially central portion between the base portion and the free end, and the inner side 7a, 8a The joints are connected with hinges 9 and 9 so that the outer portions 7b and 8b can bend and stretch. Moreover, the inner side 7a, 8a and the outer side 7b, 8b are urged by springs 10, 10 having appropriate elasticity so that they always extend.

  The bases of the inner sides 7 a and 8 a of the plate shutters 7 and 8 are pivotally attached to pivots 12 and 12 installed between the bearing plates 11 and 11 that are opposed to the upper part of the shutter mounting frame 4.

  The hinge 9 is formed by inserting the connecting shaft 9A in a skewered manner in a state where the portions 9a 'and 9b' projecting obliquely downward of the pair of rotating pieces 9a and 9b are staggered. The upper surfaces of the pair of rotating pieces 9a and 9b are fixed to the lower surfaces of the plate shutters 7 and 8, respectively.

  In addition, the spring 10 is bent so that a central portion of the spring rod is annular, and the connecting shaft 9A of the hinge 9 is inserted into the annular portion 10a and the portions 10b and 10c extending in the opposite direction are connected to the spring 10. It is bent into a letter shape and brought into contact with the lower surfaces of the plate shutters 7 and 8, respectively.

  Reference numeral 13 denotes a canopy hood that is mounted above the body 1 at a predetermined interval and has a dish turned upside down. Further, cushioning materials 14 and 14 are attached to appropriate positions on the inner surface of the canopy hood 13 where the plate shutters 7 and 8 come into contact.

Next, the operation of the above embodiment will be described.
When the left and right plate shutters 7 and 8 of the butterfly shutter 6 are flipped up by the wind pressure due to the rotation of the fan 2, if the tips of the outer portions 7 b and 8 b hit the inner surface of the canopy hood 13, the center portion is bent. To start. Then, it is further bent deeper by the wind pressure, and finally bent until the portions 7a, 8a of the respective plate-like shutters 7, 8 are nearly vertical. As a result, the opening angle of the shutter is increased, and the amount of exhaust air is greatly increased as compared with a conventional exhaust roof fan. When the fan 2 stops rotating and the wind pressure disappears, the plate shutters 7 and 8 return to their original state due to their own weights. It is covered in a flat state.

It is a center longitudinal section front view of the example of the present invention. It is an enlarged view of A part in FIG. It is the top view which notched and showed a part of Example of this invention. FIG. 4 is an enlarged view of a portion B in FIG. 3. It is an enlarged view of the base part pivoting part of a plate-shaped shutter. It is a top view of the hinge and spring for a bending motion of a plate-shaped shutter. It is explanatory drawing of the opening / closing operation | movement of a plate-shaped shutter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body 2 Fan 3 Motor 4 Shutter mounting frame 6 Butterfly-type shutter 7, 8 Plate-shaped shutter 9, 9 Hinge 10, 10 Spring 12, 12 Axis 13 Canopy hood 14, 14 Buffer material

Claims (3)

  It consists of a cylindrical body that is open at the top and bottom, a fan that is arranged inside the body and rotated by a motor, and a pair of left and right plate shutters attached to the upper open portion of the body with a shutter mounting frame, A butterfly shutter that rotates in the vertical direction at the same time with a pivot on which the base of the outer free end is pivotally attached as a fulcrum, and a canopy that is mounted above the body at a predetermined interval and has an inverted dish In the exhaust roof fan comprising a hood, each of the left and right plate shutters in the butterfly shutter is divided into an inner portion and an outer portion at a substantially central portion between the base portion and the free end, and the joint is provided with a hinge. It is connected to bendable and stretchable, and is biased so as to be always extended with a spring having an appropriate elasticity. The gas roof fan.   The hinges are inserted in a skewered manner in a state where the portions of the pair of rotating pieces projecting obliquely downward are staggered and the upper surfaces of the pair of rotating pieces are fixed to the lower surfaces of the plate shutters, respectively. The spring is bent so that one spring rod is annular at the center, and the connecting shaft of the hinge is inserted into the annular part and the end extending in the opposite direction is folded into a U-shape. 2. The exhaust roof fan according to claim 1, wherein the exhaust roof fan is a spring bent and brought into contact with the lower surface of the plate shutter. The exhaust roof fan according to claim 1 or 2, wherein a cushioning material is attached to an appropriate location on the inner surface of the canopy hood where the plate shutter contacts.

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