Ventilation fan mounting structure and ventilation fan mounting method

Abstract

This invention provides a highly durable and safe ventilation fan mounting structure that can securely and stably hold large ventilation fans to the walls of buildings with large spaces such as factories and warehouses. [Solution] The ventilation fan mounting structure 10 for installing a ventilation fan 12 on the outdoor side of a building wall 11 has a mounting frame 14 that is attached along the periphery of an opening 13 formed in the wall 11 and into which the ventilation fan 12 is fitted and fixed, and the mounting frame 14 has a ventilation fan support portion 16 that abuts against the bottom portion 15 of the ventilation fan 12 to support the ventilation fan 12 when the ventilation fan 12 is fitted and fixed.

Description

[[Technical Field]]

[0001] The present invention relates to a ventilation fan mounting structure and a ventilation fan mounting method for mounting a ventilation fan on a wall of a building such as a factory or a warehouse. [[Background Art]]

[0002] Conventionally, exhaust ventilation fans have been mounted on the wall surfaces or ceilings of various buildings to ventilate the interior of the buildings. However, in buildings having large-scale spaces such as factories and warehouses, the distance from the central part of the building to the wall surface is long and the ceiling is high, so there is a problem that sufficient ventilation cannot be performed only with the air volume of the exhaust ventilation fan. In addition, if indoor ventilation is insufficient and air remains stagnant, the indoor temperature tends to rise in summer, leading to problems such as deterioration of the working environment and the occurrence of heat stroke. Furthermore, even when an air conditioner is installed indoors, there is a problem that air circulation is insufficient in a large-scale space, the efficiency of cooling and heating tends to decrease, and energy saving performance is poor. In addition, in 2020, a ministerial ordinance amending part of the Ordinance on Prevention of Dust Disorders and the Occupational Safety and Health Regulations (Ordinance on Prevention of Dust Disorders, Chapter 1, Article 1) was announced by the Labor Standards Bureau of the Ministry of Health, Labour and Welfare. As a responsibility of target business operators, it has been regulated that efforts shall be made to take necessary measures such as improving the working environment in order to prevent health disorders of workers exposed to dust. Therefore, in factories using welding machines that generate welding fumes (metal vapor of condensed fine particles), it is required to discharge the welding fumes that rise to the ceiling side and float in the building to the outside of the building. For example, Patent Document 1 discloses an air conditioning system for a large-scale space that promotes ventilation of the large-scale space such as a factory or a warehouse to air condition the large-scale space, wherein an intake blower for introducing outside air is disposed in the lower part of the large-scale space to be air-conditioned, and an exhaust blower for discharging indoor air is disposed on the wall surface of the large-scale space at a height of 50% or more of the height to the ceiling. On the other hand, Patent Document 2 discloses a ventilation fan in which a steel plate outer frame is fitted and fixed into a mounting opening provided in a room wall or the like, and a ventilation fan main body is mounted inside the outer frame. [[Prior Art Documents]] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2019-70480 [Patent Document 2] Japanese Utility Model Publication No. 56-3339 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, while Patent Document 1 discloses the overall configuration of an air conditioning system, it does not describe a specific structure for mounting an exhaust fan (ventilation fan) to a wall. In contrast, Patent Document 2 discloses a structure in which an outer frame is fitted and fixed into a mounting opening provided in the wall, and a mounting frame covering the outer circumference of the ventilation fan body is attached to the outer frame. The outer frame attached to the mounting opening is provided with engaging means for detachably holding the cover of the ventilation fan body. This is because Patent Document 2 aims to prevent the cover, which is detachably attached to the ventilation fan body, from falling off and to facilitate the attachment and removal of the cover during cleaning. The ventilation fan targeted by Patent Document 2 is installed on the indoor side of a kitchen or similar in a typical home, and is relatively small and lightweight, so the worker can support the ventilation fan body (mounting frame) with their hand while attaching it to the outer frame. In contrast, ventilation fans used for ventilating large spaces, such as those described in Patent Document 1, are large and heavy, requiring multiple workers for installation, which is time-consuming and laborious. Furthermore, the workers who hold the ventilation fan by hand during installation bear a heavy burden, and there is a risk of dropping the fan due to slipping hands or losing balance during the process.

[0005] This invention has been made in view of the above circumstances, and aims to provide a ventilation fan mounting structure with excellent durability and safety that can reliably and stably hold a large ventilation fan to the wall of a building with a large space such as a factory or warehouse, and a ventilation fan mounting method with excellent labor-saving and workability that can quickly, easily and reliably install a large ventilation fan to the wall of a building with a large space such as a factory or warehouse. [Means for solving the problem]

[0006] The ventilation fan mounting structure according to the first invention, which is in line with the aforementioned purpose, is a ventilation fan mounting structure for installing a ventilation fan on the outdoor side of a building wall, The mounting frame is attached along the periphery of the opening formed in the wall and into which the ventilation fan is fitted and fixed, and the mounting frame has a ventilation fan support portion that abuts against the bottom of the ventilation fan when the ventilation fan is fitted and fixed, thereby supporting the ventilation fan.

[0007] In the ventilation fan mounting structure according to the first invention, it is preferable that the mounting frame is welded and fixed to the wall, and the ventilation fan is screw-fastened to the mounting frame.

[0008] In the ventilation fan mounting structure according to the first invention, it is preferable that the mounting frame is formed in the shape of a rectangular frame when viewed from the front, and the ventilation fan receiving portion has support pieces that protrude forward from two locations on the left and right sides of the lower edge of the mounting frame.

[0009] A ventilation fan mounting method according to the second invention, which is in line with the aforementioned purpose, is a ventilation fan mounting method for installing a ventilation fan on the outdoor side of a building wall, The method includes an opening forming step of forming an opening in the wall, a mounting frame installation step of installing a mounting frame along the periphery of the opening, and a ventilation fan installation step of fitting and fixing the ventilation fan into the mounting frame, wherein during the ventilation fan installation step, the bottom of the ventilation fan fitted into the mounting frame is supported by a ventilation fan support portion provided on the mounting frame.

[0010] In the ventilation fan mounting method according to the second invention, it is preferable that the mounting frame installation step includes a welding step of welding the mounting frame to the wall and a water-sealing step of sealing the outer circumference of the mounting frame with a water-sealing material. [Effects of the Invention]

[0011] The ventilation fan mounting structure according to the first invention prevents the ventilation fan from falling during installation by supporting the bottom of the ventilation fan with a mounting frame that is installed in an opening in the wall of a building. In addition, the mounting frame can reinforce the outer perimeter (housing) of the ventilation fan, improving the durability and fixing stability of the ventilation fan.

[0012] In the ventilation fan mounting structure according to the first invention, when the mounting frame is welded to the wall and the ventilation fan is screwed to the mounting frame, the wall and the mounting frame can be firmly fixed to improve durability, the ventilation fan can be easily and securely fixed to the mounting frame, and the ventilation fan can be removed for repair or replacement as needed, resulting in excellent maintainability.

[0013] In the ventilation fan mounting structure according to the first invention, if the mounting frame is formed in the shape of a rectangular frame when viewed from the front, and the ventilation fan receiving portion has support pieces that protrude forward from two locations on the left and right sides of the lower edge of the mounting frame, the ventilation fan can be reliably supported by the support pieces regardless of the straightness or smoothness of the bottom of the ventilation fan.

[0014] The ventilation fan mounting method according to the second invention allows the ventilation fan to be supported by the mounting frame during the installation work, preventing it from falling, and is excellent in terms of labor saving and ease of installation.

[0015] In the ventilation fan installation method according to the second invention, if the installation step of the mounting frame includes a welding step of welding the mounting frame to the wall and a waterproofing step of sealing the outer circumference of the mounting frame with a waterproofing material, the mounting frame can be firmly fixed to the wall, and rainwater and the like can be prevented from entering the interior of the building through the gap between the opening and the mounting frame. [Brief explanation of the drawing]

[0016] [Figure 1] It is a partial cross-sectional side view showing a ventilation fan mounting structure according to one embodiment of the present invention. [Figure 2] It is a front view of the same ventilation fan mounting structure. [Figure 3] It is a front view showing a mounting frame installation step of a ventilation fan mounting method according to one embodiment of the present invention. [Figure 4] It is a cross-sectional view taken along line A-A of FIG. 3. MODE FOR CARRYING OUT THE INVENTION

[0017] Next, with reference to the accompanying drawings, specific embodiments of the present invention will be described to facilitate understanding of the present invention. A ventilation fan mounting structure 10 according to one embodiment of the present invention shown in FIG. 1 and FIG. 2 is for mounting a ventilation fan 12 on a wall 11 of a building such as a factory or a warehouse. As shown in FIG. 3 and FIG. 4, the ventilation fan mounting structure 10 has a mounting frame 14 that is mounted along the periphery of an opening 13 formed in the wall 11, and into which the ventilation fan 12 is fitted and fixed. The mounting frame 14 is formed in a rectangular frame shape in front view corresponding to the outer shape of the ventilation fan 12. As the mounting frame 14, one formed by welding metal square bars is suitably used, but the mounting frame 14 is not limited thereto.

[0018] It is preferable that the mounting frame 14 is welded and fixed to the wall 11, but the fixing method is not limited thereto, and it may be fixed by screwing or other methods. Further, as shown in FIG. 1 and FIG. 2, the mounting frame 14 has a ventilation fan receiving portion 16 that abuts against a bottom portion 15 of the ventilation fan 12 and supports the ventilation fan 12 when the ventilation fan 12 is fitted and fixed. The ventilation fan receiving portion 16 has support pieces 19 provided to protrude forward from two left and right positions on the lower side portion 18 of the mounting frame 14, respectively, as shown in FIG. 2 and FIG. 3. Thereby, even if the bottom portion 15 of the ventilation fan 12 has inclination, undulation or the like, the two support pieces 19 can be brought into contact with the bottom portion 15 of the ventilation fan 12 to reliably support the ventilation fan 12. The support pieces 19 are fixed to the mounting frame 14 by welding. It is sufficient that the support pieces 19 have strength enough to support the ventilation fan 12, and the shape, dimensions (area and thickness), number, arrangement interval and the like thereof are appropriately selected. Further, the ventilation fan 12 is screwed and fixed to the mounting frame 14 by a male screw such as a screw (not shown). The number and arrangement of the male screws used for screwing are appropriately selected.

[0019] In the ventilation fan mounting structure 10 configured as described above, the bottom portion 15 of the ventilation fan 12 is supported by the ventilation fan receiving portion 16 (the support pieces 19) of the mounting frame 14 which is pre-mounted in the opening 13 of the wall 11, so that falling of the ventilation fan 12 during the mounting work of the ventilation fan 12 can be prevented, and the ventilation fan 12 can be stably supported even after the mounting is completed. Further, by surrounding the outer circumference (housing) of the ventilation fan 12 formed of FRP (fiber reinforced plastic) or synthetic resin with the metal mounting frame 14, the outer circumference (housing) of the ventilation fan 12 can be reinforced and the durability can be improved.

[0020] Next, a ventilation fan mounting method according to an embodiment of the present invention will be described. First, as shown in FIG. 3 and FIG. 4, an opening 13 is formed in a wall 11 of a building by an opening forming step.

[0021] Next, a mounting frame installing step installs the mounting frame 14 along the periphery of the opening 13 (inside the opening 13). In this mounting frame installing step, a welding step of welding the mounting frame 14 to the wall 11 and a water stopping step of sealing the outer circumference of the mounting frame 14 with a water stopping material (not shown) are performed. Thereby, the wall 11 and the mounting frame 14 can be firmly fixed, and the gap between the wall 11 and the mounting frame 14 is blocked by the water stopping material (such as water dripper and caulking) to prevent intrusion of rainwater or the like.

[0022] Next, in the ventilation fan installation process, as shown in Figures 1 and 2, the ventilation fan 12 is fitted into the mounting frame 14 and secured with screws. The worker needs to support the ventilation fan 12 by hand to prevent it from falling until the fixing work is complete. However, during the ventilation fan installation process, the bottom 15 of the ventilation fan 12 fitted into the mounting frame 14 can be supported by the two support pieces 19 of the ventilation fan support part 16 provided on the mounting frame 14. Therefore, even if the ventilation fan 12 is large and heavy (for example, with sides of about 1 to 1.5 m and weighing about 40 to 70 kg), the worker can reliably support it with little force to prevent it from falling. Furthermore, the number of workers who need to support the ventilation fan 12 can be reduced, resulting in excellent labor-saving, safety, and ease of installation. Through the above steps, the ventilation fan mounting structure 10 shown in Figures 1 and 2 can be obtained.

[0023] Although embodiments of the present invention have been described above, the present invention is not limited in any way to the configurations described in the embodiments described above, and includes other embodiments and modifications that can be considered within the scope of the matters described in the claims. [Explanation of Symbols]

[0024] 10: Ventilation fan mounting structure, 11: Wall, 12: Ventilation fan, 13: Opening, 14: Mounting frame, 15: Bottom, 16: Ventilation fan support, 18: Lower edge, 19: Support piece

Claims

1. A ventilation fan mounting structure for installing a ventilation fan on the exterior side of a building wall, A ventilation fan mounting structure characterized by having a mounting frame that is attached along the inner circumference of an opening formed in the wall and into which the ventilation fan is fitted and fixed, the mounting frame having a ventilation fan receiving portion, the ventilation fan receiving portion being provided to protrude forward from the mounting frame toward the outside, and having a support piece that abuts against the bottom of the ventilation fan and supports the ventilation fan when the ventilation fan is fitted and fixed into the mounting frame.

2. The ventilation fan mounting structure according to claim 1, characterized in that the mounting frame is welded to the wall, and the ventilation fan is screw-fastened to the mounting frame.

3. The ventilation fan mounting structure according to claim 1 or 2, characterized in that the mounting frame is formed in the shape of a rectangular frame when viewed from the front, and the support pieces of the ventilation fan receiving portion are provided at two locations on the left and right sides of the lower edge of the mounting frame.

4. A method for installing a ventilation fan on the exterior side of a building wall, A method for installing a ventilation fan, comprising: an opening forming step of forming an opening in the wall; an installation frame setting step of setting up an installation frame along the inner circumference of the opening; and a ventilation fan installation step of fitting and fixing the ventilation fan into the installation frame, wherein during the ventilation fan installation step, the bottom of the ventilation fan fitted into the installation frame is supported by a ventilation fan receiving portion having a support piece that protrudes forward from the installation frame toward the outside.

5. The ventilation fan mounting method according to claim 4, characterized in that the mounting frame installation step comprises a welding step of welding the mounting frame to the wall and a waterproofing step of sealing the outer circumference of the mounting frame with a waterproofing material.

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