Ventilator and connecting parts

Abstract

To obtain a ventilation fan which enables viewing a connection hole when an anchor bolt is inserted into the connection hole.SOLUTION: A ventilation fan 1 includes: a ventilation fan body 2 having a box shaped housing 2a formed with a suction port for suctioning indoor air and an exhaust port 2g for exhausting the suctioned air, and a fan installed within the housing 2a; a frame-like attachment member 4 which is disposed along an opening edge of an installation hole 20a and in which the ventilation fan body 2 is inserted into the inner periphery side; and a connection member 5 which connects an anchor bolt 18 with the attachment member 4. The connection member 5 has: a first wall 5a extending upward from an inner peripheral edge of the attachment member 4 and fixed to a side surface 2d of the housing 2a or the attachment member 4; and a second wall 5b extending from an upper end of the first wall 5a in a direction away from the ventilation fan body 2 and formed with a connection hole 5i into which the anchor bolt 18 is inserted. The first wall 5a is formed with an opening 5c which enables viewing the connection hole 5i when viewing the first wall 5a from the installation hole 20a.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a ventilation fan and a connecting member to be installed in a ceiling of a building. [Background technology]

[0002] Conventionally, there is known a ventilation fan that is installed on the ceiling of a building. Such a ceiling-mounted ventilation fan has a ventilation fan main body that draws in indoor air and exhausts the indoor air to the outside through a duct connected to the ventilation fan main body. The ventilation fan main body is installed on the ceiling using a hole opened in the ceiling. A duct connector for connecting a duct is attached to the ventilation fan main body.

[0003] A common method for installing a ventilation fan on the ceiling of a building is to place a frame-shaped mounting member along the periphery of a hole in the ceiling and then secure the ventilation fan body to the mounting member with screws, as disclosed in Patent Document 1. The mounting member is either directly fixed to anchor bolts suspended above the ceiling, or fixed via a ceiling hanging bracket.

[0004] The ceiling hanging hardware disclosed in Patent Document 1 has a first wall extending upward from the inner peripheral edge of the mounting member, and a second wall extending horizontally from the upper end of the first wall in a direction away from the ventilator main body. In the technology disclosed in Patent Document 1, an anchor bolt is inserted into a connecting hole formed in the second wall, and a nut attached to the anchor bolt is tightened to fix the ceiling hanging hardware to the anchor bolt. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-4187 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the technology disclosed in Patent Document 1, when inserting the anchor bolt into the connecting hole of the ceiling-mounted fitting through the hole in the ceiling, the connecting hole may be hidden by the first wall and may not be visible. This creates a problem in that the work of inserting the anchor bolt into the connecting hole of the ceiling-mounted fitting becomes complicated.

[0007] The present disclosure has been made in consideration of the above, and has an object to provide a ventilation fan that allows the connecting hole to be visually confirmed when inserting an anchor bolt into the connecting hole. [Means for solving the problem]

[0008] In order to solve the above problems and achieve the object, the ventilation fan according to the present disclosure is a ventilation fan that is installed on a ceiling using an installation hole formed in the ceiling, and includes a ventilation fan main body having a box-shaped housing with an intake port for drawing in indoor air and an exhaust port for discharging the drawn air, a fan arranged inside the housing, a frame-shaped mounting member arranged along the opening edge of the installation hole and into which the ventilation fan main body is inserted, and a connecting member that connects the mounting member to an anchor bolt suspended in the ceiling space formed above the ceiling. The connecting member has a first wall that extends upward from the inner peripheral edge of the mounting member and is fixed to the side of the housing or the mounting member, and a second wall that extends from the upper end of the first wall in a direction away from the ventilation fan main body and has a connecting hole formed therein into which the anchor bolt is inserted. The first wall has an opening through which the connecting hole can be seen when the first wall is viewed from the installation hole. Effect of the Invention

[0009] The ventilation fan according to the present disclosure has an advantage that the connecting hole can be visually confirmed when inserting the anchor bolt into the connecting hole. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of the ventilation fan according to the first embodiment, seen from the ceiling side, showing a state in which a decorative grill is removed from the ventilation fan body. [Diagram 2] FIG. 1 is a perspective view of the exhaust fan according to the first embodiment, seen from the indoor side, showing a state in which a decorative grill is removed from the exhaust fan body; [Diagram 3] FIG. 1 is a vertical cross-sectional view showing a ventilation fan according to a first embodiment. [Figure 4] FIG. 4 is a diagram showing the ventilation fan according to the first embodiment as seen from the indoor side, with the decorative grill shown in FIG. 3 removed. [Diagram 5] FIG. 1 is a perspective view of a ventilation fan according to a first embodiment, seen from the ceiling side; [Figure 6] FIG. 1 is a vertical cross-sectional view showing a ventilation fan according to a first embodiment, in which the ventilation fan is installed in the ceiling of a building. [Figure 7] FIG. 1 is a cross-sectional perspective view showing a ventilation fan according to a first embodiment, the ventilation fan being installed in the ceiling of a building; [Figure 8] FIG. 1 is a vertical cross-sectional view showing a schematic diagram of an assembled state of a ventilation fan body, a mounting member, and a connecting member according to the first embodiment; [Figure 9] FIG. 1 is a perspective view of an anchor bolt, a connecting member, and a mounting member according to the first embodiment, viewed from above the ceiling. [Figure 10] FIG. 1 is a perspective view showing a connecting member according to the first embodiment; [Figure 11] FIG. 1 is a horizontal cross-sectional view showing a schematic diagram of an assembled state of a ventilation fan body, a mounting member, and a connecting member according to the first embodiment. [Figure 12] FIG. 1 is a vertical cross-sectional view showing a schematic preparation process of a method for installing a ventilation fan according to a first embodiment. [Figure 13] FIG. 1 is a vertical cross-sectional view showing an insertion step of the installation method for the ventilation fan according to the first embodiment, illustrating a state during insertion where the elastic member is in contact with the cut and raised portion; [Figure 14] FIG. 11 is a vertical cross-sectional view showing an insertion step of the installation method for the ventilation fan according to the first embodiment, illustrating a state after insertion in which the elastic member is located above the cut-and-raised portion; [Figure 15] FIG. 11 is a vertical cross-sectional view showing a temporary fixing step of the installation method for the ventilation fan according to the first embodiment. [Figure 16]FIG. 11 is a horizontal cross-sectional view showing a temporary fixing step of the installation method for the ventilation fan according to the first embodiment. [Figure 17] FIG. 11 is a vertical cross-sectional view showing a main fixing step of the installation method for the ventilation fan according to the first embodiment. [Figure 18] FIG. 11 is a vertical cross-sectional view showing a first removal step of the installation method for the ventilation fan according to the first embodiment; [Figure 19] FIG. 11 is a vertical cross-sectional view showing a second removal step of the installation method for the ventilation fan according to the first embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a ventilation fan and a connecting member according to an embodiment will be described in detail with reference to the drawings.

[0012] Embodiment 1 1 is a perspective view of a ventilation fan 1 according to a first embodiment as viewed from the ceiling space 21 side, illustrating a state in which a decorative grill 6 has been removed from a ventilation fan main body 2. As shown in FIG. 1, the ventilation fan 1 includes a ventilation fan main body 2, a duct connection member 3, an attachment member 4, a coupling member 5, and the decorative grill 6.

[0013] The ceiling 20 is formed with an installation hole 20a that communicates the room with the attic 21. In FIG. 1, the upper side of the ceiling 20 on the paper surface is the attic 21, and the lower side of the ceiling 20 on the paper surface is the room. In FIG. 1, a part of the ceiling 20 is cut out to show the mounting member 4. In this embodiment, the shape of the installation hole 20a is a rectangle. The ventilation fan 1 is installed on the ceiling 20 using the installation hole 20a formed in the ceiling 20. The attic 21 is formed above the ceiling 20. The ventilation fan 1 is installed from the installation hole 20a to the attic 21. The attic 21 is a space formed between the ceiling 20 and an upper floor slab not shown. A plurality of anchor bolts 18 are suspended from the attic 21. The anchor bolts 18 are suspended from the upper floor slab.

[0014] Fig. 2 is a perspective view of the ventilation fan 1 according to the first embodiment as seen from the indoor side, showing a state in which the decorative grill 6 has been removed from the ventilation fan body 2. As shown in Figs. 1 and 2, the ventilation fan body 2 has a box-shaped housing 2a and a fan 2b arranged inside the housing 2a.

[0015] As shown in FIG. 1, the housing 2a has a top surface 2c and four side surfaces 2d. As shown in FIG. 2, the housing 2a has a bottom surface 2e. The bottom surface 2e is disposed below the top surface 2c and spaced apart from the top surface 2c. The four side surfaces 2d connect the top surface 2c and the bottom surface 2e. The housing 2a has an intake port 2f for drawing in indoor air. The intake port 2f opens on the surface of the housing 2a facing the room, that is, on the bottom surface 2e of the housing 2a in this embodiment. The housing 2a is installed with the intake port 2f facing the room. On the bottom surface 2e, a mounting flange portion 2h is formed on the periphery of the intake port 2f, which protrudes in a direction away from the center of the intake port 2f. As shown in FIG. 1, the housing 2a has an exhaust port 2g for exhausting the intake air. The exhaust port 2g opens on one of the four side surfaces 2d of the housing 2a.

[0016] Fig. 3 is a vertical cross-sectional view showing the ventilation fan 1 according to the first embodiment. In Fig. 3, the anchor bolts 18, the connecting members 5, and the mounting members 4 are omitted. As shown in Fig. 3, the fan 2b is a device that is installed inside the housing 2a and generates an air flow that flows into the housing 2a from the intake port 2f and flows out from the exhaust port 2g. The fan 2b has a fan casing 2i, a motor 2j, and blades 2k.

[0017] The bottom surface of the fan casing 2i facing the room is provided with an inlet 2m for sucking in air that has flowed into the housing 2a from the inlet 2f. The side surface of the fan casing 2i is provided with an outlet 2n for discharging air from the inside of the fan casing 2i toward the outlet 2g. The fan 2b is installed with the inlet 2m facing the inlet 2f and the outlet 2n facing the outlet 2g. The fan casing 2i is fixed to the top surface 2c of the housing 2a with screws (not shown). As shown in FIG. 2, the bottom surface of the fan casing 2i facing the room is provided with a spring fixing part 2o attached with screws or fasteners (not shown).

[0018] 3 rotates the blades 2k. The motor 2j is fixed to the top surface 2c of the housing 2a. The blades 2k are disposed inside the fan casing 2i. The blades 2k are attached to the shaft 2p of the motor 2j.

[0019] The duct connection member 3 is a member that is detachably attached to the side surface 2d of the housing 2a so as to communicate with the exhaust port 2g, and is connected to the duct 14. As shown in Fig. 1, the duct connection member 3 has a vertical wall 3a and a connection portion 3b.

[0020] The vertical wall 3a is fixed to the mounting member 4 and extends upward from the mounting member 4. Although not specifically shown in the drawings, the vertical wall 3a is fixed to the mounting member 4 with screws or the like. The vertical wall 3a is parallel to the side surface 2d of the housing 2a. The connection portion 3b extends from the vertical wall 3a in a direction away from the ventilation fan main body 2.

[0021] The connection part 3b is a part to which the duct 14 is connected. The connection part 3b extends from the vertical wall 3a in a direction perpendicular to the vertical wall 3a. The connection part 3b is formed in a cylindrical shape. The shape of the connection part 3b is a shape in which a square tube-shaped part and a cylindrical part are connected from the intake side to the exhaust side. The outer shape of the cylindrical part of the connection part 3b is stepped with parts of different diameters. The diameter of the cylindrical part of the connection part 3b becomes smaller as it moves away from the ventilation fan main body 2. Since the outer shape of the cylindrical part of the connection part 3b is stepped with different diameters, multiple ducts 14 with different inner diameters can be selectively connected to the connection part 3b, and the work of winding tape to fix the duct 14 to the connection part 3b is facilitated.

[0022] As shown in FIG. 3, the connection part 3b communicates between the exhaust port 2g of the housing 2a and the duct 14. The connection part 3b serves to extend the position where air is discharged from the housing 2a to a position where the air is communicated with the duct 14. A shutter 7 that opens and closes with wind pressure is provided inside the connection part 3b. The shutter 7 opens with wind pressure when the exhaust fan 1 is operating, and closes the inside of the connection part 3b with its own weight when the exhaust fan 1 is stopped. By providing the shutter 7 inside the connection part 3b, for example, in the case where the duct 14 is connected to the outside of the room, it is possible to prevent outside air from entering the room through the duct 14 when the exhaust fan 1 is stopped.

[0023] The exhaust fan 1 is a device that draws in indoor air through a lattice portion 6a of the decorative grille 6 described below and an air intake 2f of the housing 2a, and exhausts the air to the outside or another indoor space through the exhaust port 2g, the duct connection member 3, and the duct 14. When the duct 14 is connected to the outside of the room, the exhaust fan 1 functions as an exhaust fan that exhausts indoor air to the outside, and when the duct 14 is connected to another indoor space, the exhaust fan 1 functions as a circulation fan that circulates air within the room. When the duct 14 is connected to the outside of the room, the duct 14 extends to the outside and is connected to a hood (not shown) or the like attached to the exterior wall of the building, forming a ventilation air passage that ventilates the air inside the building.

[0024] Fig. 4 is a view of the ventilation fan 1 according to the first embodiment as seen from the indoor side, with the decorative grill 6 shown in Fig. 3 removed. As shown in Fig. 4, an openable / closable terminal cover 10 is attached to the bottom surface of the fan casing 2i facing the indoor side. The terminal cover 10 has a cylindrical rotating shaft 10a. The fan casing 2i is provided with a support portion 2s that rotatably supports the rotating shaft 10a. The support portion 2s is formed with a rotation hole into which the rotating shaft 10a is inserted. The terminal cover 10 rotates around the rotating shaft 10a.

[0025] A power connection device 11 that is connected to an external power source (not shown) is disposed in a space covered by the terminal cover 10. The terminal cover 10 can be opened and closed. When the terminal cover 10 is closed, the terminal cover 10 covers the power connection device 11. The fan casing 2i is provided with a protective wall 2t that surrounds the periphery of the terminal cover 10. When the terminal cover 10 is closed, the terminal cover 10 and the protective wall 2t can improve the airtightness of the space that houses the power connection device 11. On the other hand, when the terminal cover 10 is open, the power connection device 11 can be accessed, so that an external power cable (not shown) that connects the external power source and the power connection device 11 can be easily connected to the power connection device 11 from inside the room. As shown in FIG. 3, a finger hook 10b for an operator to hook his / her finger is provided on the surface of the terminal cover 10 facing the room. This makes it easy to open the terminal cover 10. The power connection device 11 shown in FIG. 4 is isolated from the air passage by the terminal cover 10. This makes it possible to suppress the intrusion of dust, moisture, and the like from the air passage into the power connection device 11.

[0026] FIG. 5 is a perspective view of the ventilation fan 1 in the first embodiment as seen from the ceiling space 21 side. In FIG. 5, the anchor bolts 18, the connecting member 5, and the mounting member 4 are omitted from illustration. The motor electric wire 12 is wired along the top surface 2c of the housing 2a, and is drawn into the inside of the housing 2a, that is, into the part that houses the power connection device 11, through a bush 13 provided on the top surface 2c. The motor electric wire 12 electrically connects the motor 2j to the power connection device 11 shown in FIG. 4. Power supplied from an external power source (not shown) is transmitted to the motor 2j through the power connection device 11 and the motor electric wire 12. Electric energy is converted into the rotational motion of the shaft 2p of the motor 2j shown in FIG. 3, and the rotational motion of the motor 2j is transmitted to the blades 2k, causing the blades 2k to rotate. The rotation of the blades 2k generates an airflow from the intake port 2f toward the exhaust port 2g in the air passage formed by the fan casing 2i.

[0027] As shown in FIG. 2, the decorative grill 6 is disposed on the surface of the ceiling 20 facing the room so as to cover the installation hole 20a from below. The decorative grill 6 is a design part for hiding the internal parts such as the fan 2b from being seen from inside the room. This does not spoil the appearance of the ventilator 1 when viewed from inside the room. The decorative grill 6 has a lattice part 6a through which indoor air can pass, and a frame part 6b attached to the periphery of the lattice part 6a. As shown in FIG. 1, the decorative grill 6 further has a spring 6c. The decorative grill 6 is fixed to the fan casing 2i by hooking the spring 6c shown in FIG. 1 to the spring fixing part 2o attached to the fan casing 2i shown in FIG. 2.

[0028] As shown in FIG. 1, the mounting member 4 is a frame-shaped member that is arranged along the opening edge of the installation hole 20a and the ventilation fan main body 2 is inserted into the inner periphery side. In this embodiment, the shape of the mounting member 4 is a rectangular frame. FIG. 6 is a vertical cross-sectional view showing the ventilation fan 1 according to the first embodiment, and shows the state in which the ventilation fan 1 is installed in the ceiling space 21 of the building. Note that FIG. 6 does not show the decorative grill 6. As shown in FIG. 6, the mounting member 4 has a first flange portion 4a, a second flange portion 4b, a third flange portion 4c, and a cut-and-raised portion 4d. The first flange portion 4a, the second flange portion 4b, the third flange portion 4c, and the cut-and-raised portion 4d are arranged in this order from the outer periphery to the inner periphery of the mounting member 4. Hereinafter, the direction from the outer periphery to the inner periphery of the frame-shaped mounting member 4 is referred to as the inner periphery side of the mounting member 4, and the direction from the inner periphery to the outer periphery of the mounting member 4 is referred to as the outer periphery side of the mounting member 4.

[0029] The first flange portion 4a extends in the horizontal direction. The first flange portion 4a is in contact with a surface of the ceiling 20 facing the interior of the room. The first flange portion 4a is parallel to the surface of the ceiling 20 facing the interior of the room. The first flange portion 4a is hidden from view from the interior of the room by the decorative grill 6 shown in FIG. 3.

[0030] The second flange portion 4b extends upward from the end of the inner periphery of the first flange portion 4a. The second flange portion 4b is perpendicular to the first flange portion 4a. The second flange portion 4b is in contact with the inner wall of the installation hole 20a. The second flange portion 4b is parallel to the inner wall of the installation hole 20a.

[0031] The third flange portion 4c extends horizontally from the upper end of the second flange portion 4b toward the inner periphery. The third flange portion 4c is perpendicular to the second flange portion 4b. The third flange portion 4c is parallel to the first flange portion 4a. The third flange portion 4c is disposed inside the installation hole 20a. The third flange portion 4c is disposed above the mounting flange portion 2h and spaced apart from the mounting flange portion 2h.

[0032] FIG. 7 is a cross-sectional perspective view showing the ventilation fan 1 according to the first embodiment, and shows a state in which the ventilation fan 1 is installed in the ceiling 21 of a building. FIG. 8 is a vertical cross-sectional view that typically shows a state in which the ventilation fan body 2, the mounting member 4, and the connecting member 5 according to the first embodiment are assembled. In FIG. 8, for simplification, only a part of the ventilation fan body 2, a part of the mounting member 4, and a part of the connecting member 5 are enlarged and illustrated. As shown in FIG. 7, the third flange portion 4c is superimposed on the mounting flange portion 2h. As shown in FIG. 8, the third flange portion 4c has a fixing hole 4f formed therein. The mounting flange portion 2h has a fixing hole 2r formed therein. A fastening member 15 that fastens the mounting member 4 and the ventilation fan body 2 is inserted into the fixing hole 4f of the third flange portion 4c and the fixing hole 2r of the mounting flange portion 2h. The fastening member 15 is, for example, a screw.

[0033] FIG. 9 is a perspective view of the anchor bolt 18, the connecting member 5, and the mounting member 4 in the first embodiment, as viewed from the ceiling space 21 side. The cut-and-raised portion 4d extends upward from the end of the inner periphery of the third flange portion 4c. In other words, the cut-and-raised portion 4d extending upward is provided on the inner periphery of the mounting member 4. The inner periphery of the mounting member 4 is a polygonal shape having a plurality of sides 4h. In this embodiment, the inner periphery of the mounting member 4 is a quadrangle having four sides 4h. In this embodiment, two cut-and-raised portions 4d are provided on each of the plurality of sides 4h, but it is sufficient that at least one cut-and-raised portion 4d is provided.

[0034] As shown in FIG. 6, at least one of the cut-and-raised portions 4d is provided below the connection portion 3b and is provided at a position that can contact the vertical wall 3a on the outer circumferential side of the mounting member 4 relative to the vertical wall 3a. The cut-and-raised portion 4d that can contact the vertical wall 3a is disposed with a gap between it and the vertical wall 3a. When the duct connection member 3 is tilted toward the exhaust side, the cut-and-raised portion 4d comes into contact with the vertical wall 3a, thereby suppressing the tilt of the duct connection member 3. The cut-and-raised portion 4d is inclined so as to approach the vertical wall 3a as it goes upward. The angle θ1 formed between the third flange portion 4c and the cut-and-raised portion 4d is an obtuse angle.

[0035] As shown in Fig. 9, the cut-and-raised portions 4d are portions that are fixed to the connecting member 5. Fig. 9 illustrates a state in which two of the eight cut-and-raised portions 4d are fixed to the connecting member 5, but in reality, all of the cut-and-raised portions 4d may be fixed to the connecting member 5. Fixing holes 4g are formed in the cut-and-raised portions 4d. Fastening members 17 that fix the mounting member 4 and the connecting member 5 are inserted into the fixing holes 4g and fixing holes 5h of the connecting member 5 described below. The fastening members 17 are, for example, screws.

[0036] The connecting member 5 is a metal member that connects the mounting member 4 to the anchor bolt 18 suspended in the attic 21. The connecting member 5 is located closer to the outer periphery of the mounting member 4 than the cut-and-raised portion 4d. The connecting member 5 is L-shaped. The connecting member 5 has a first wall 5a and a second wall 5b.

[0037] The first wall 5a extends upward from the inner peripheral edge of the mounting member 4. The first wall 5a is fixed to the side surface 2d of the housing 2a or the mounting member 4. In this embodiment, the first wall 5a is fixed to the cut-and-raised portion 4d of the mounting member 4 by the fastening member 17. The first wall 5a has an opening 5c ​​through which the connecting hole 5i described later can be seen when the first wall 5a is viewed from the installation hole 20a. The opening 5c ​​extends in the vertical direction. The shape of the opening 5c ​​is rectangular in this embodiment, but may be other shapes. The opening 5c ​​is formed at a position where the anchor bolt 18 and the connecting hole 5i can be seen by an operator when inserting the anchor bolt 18 into the connecting hole 5i described later. The opening 5c ​​is located above the center of the first wall 5a in the vertical direction.

[0038] When the line connecting the intersection O between the central axis A of the anchor bolt 18 and the second wall 5b and the center C of the opening on the indoor side of the installation hole 20a is defined as a virtual line L1, the virtual line L1 passes through the first wall 5a. The first wall 5a is located between the intersection O and the center C of the opening on the indoor side of the installation hole 20a. The position of the virtual line L1 that passes through the first wall 5a overlaps with the upper edge of the opening 5c. In other words, the virtual line L1 coincides with the upper edge of the opening 5c ​​on the first wall 5a. Here, when the virtual line L1 that is rotated downward by 5° to 30° with the center C of the opening on the indoor side of the installation hole 20a as the base point is defined as a virtual line L2, the virtual line L2 passes through the first wall 5a. The position of the virtual line L2 that passes through the first wall 5a overlaps with the lower edge of the opening 5c. In other words, the virtual line L2 coincides with the lower edge of the opening 5c ​​on the first wall 5a. The angle θ2 formed by the imaginary lines L1 and L2 is 5° to 30°. The opening 5c ​​is located between the imaginary lines L1 and L2 in the vertical direction.

[0039] Fig. 10 is a perspective view showing the connecting member 5 in the first embodiment. Fig. 11 is a horizontal cross-sectional view showing a schematic state in which the ventilation fan body 2, the mounting member 4, and the connecting member 5 in the first embodiment are assembled. For simplification, Fig. 11 shows an enlarged view of only a part of the ventilation fan body 2, a part of the mounting member 4, and a part of the connecting member 5. As shown in Figs. 10 and 11, the first wall 5a is provided with a narrowed portion 5d that protrudes toward the outer periphery of the mounting member 4. The narrowed portion 5d plays a role in ensuring the strength of the first wall 5a.

[0040] As shown in Fig. 10, the narrowed portion 5d is located below the center of the first wall 5a in the vertical direction. The narrowed portion 5d is provided below the opening 5c. The opening 5c ​​and the narrowed portion 5d are spaced apart from each other in the vertical direction. The narrowed portion 5d is provided in a certain region from the lower end to the upper end of the first wall 5a.

[0041] Hereinafter, the direction parallel to the direction from the inner periphery side toward the outer periphery side of the mounting member 4 shown in FIG. 11 is referred to as the inner / outer direction. The direction perpendicular to the up / down direction and the inner / outer direction is referred to as the orthogonal direction. As shown in FIG. 11, the drawn portion 5d has a bottom wall portion 5e extending along the orthogonal direction, and a pair of side wall portions 5f extending from both ends of the bottom wall portion 5e in the orthogonal direction toward the inner periphery side. Flat portions 5g are provided on both sides of the drawn portion 5d in the orthogonal direction. The flat portions 5g extend from the inner periphery side ends of the side wall portions 5f in the orthogonal direction in a direction away from the bottom wall portion 5e. As shown in FIG. 10, fixing holes 5h are formed in the lower portions of the flat portions 5g.

[0042] As shown in FIG. 9, the second wall 5b extends from the upper end of the first wall 5a in a direction away from the ventilator main body 2. The second wall 5b extends from the upper end of the first wall 5a in a direction intersecting with the first wall 5a. The second wall 5b has a connecting hole 5i into which the anchor bolt 18 is inserted. The connecting hole 5i penetrates the second wall 5b in the vertical direction. The connecting hole 5i has an opening at a portion facing the opposite side to the first wall 5a. As shown in FIG. 10, the connecting hole 5i is cut out in a U-shape from the tip of the second wall 5b toward the first wall 5a. A pair of arm portions 5j are formed on both sides of the second wall 5b sandwiching the connecting hole 5i. At the tips of the pair of arm portions 5j, a stopper portion 5k bent upward is formed.

[0043] As shown in FIG. 9, two nuts 19 are attached to each anchor bolt 18. The anchor bolt 18 is inserted into the connecting hole 5i from the radial direction of the anchor bolt 18, and the pair of arm portions 5j are sandwiched between the two nuts 19 by tightening the nuts 19, thereby fixing the connecting member 5 to the anchor bolt 18. The stopper portion 5k plays a role of preventing the anchor bolt 18 from coming out of the connecting hole 5i by contacting the upper nut 19 when the anchor bolt 18 and the connecting member 5 move relatively in the horizontal direction. The stopper portion 5k may be bent downward from the tip of the arm portion 5j. In this configuration, the stopper portion 5k is capable of contacting the lower nut 19.

[0044] As shown in FIG. 8, an elastically deformable elastic member 8 is provided on the side surface 2d of the housing 2a facing the mounting member 4. For example, a leaf spring with an insertion hole 8a is used as the elastic member 8. It is preferable that the leaf spring is subjected to burring processing. An upper portion of the elastic member 8 extends along the side surface 2d of the housing 2a. An insertion hole 8a is formed in the upper portion of the elastic member 8. An insertion hole 2q is formed in the side surface 2d of the housing 2a. The elastic member 8 is fixed to the housing 2a by inserting a fastening member 16 from the inside of the housing 2a into the insertion hole 2q of the housing 2a and the insertion hole 8a of the elastic member 8. The elastic member 8 is hooked on the upper end of the cut and raised portion 4d when the ventilation fan main body 2 is inserted into the inner peripheral side of the mounting member 4 as described later. The elastic member 8 and the cut and raised portion 4d play a role of temporarily fixing the ventilation fan main body 2 to the mounting member 4.

[0045] The elastic member 8 extends obliquely downward toward the outer periphery of the mounting member 4. The lower end 8b of the elastic member 8 is located on the outer periphery side of the mounting member 4 with respect to the cut and raised portion 4d. In other words, the cut and raised portion 4d is located on the inner periphery side of the mounting member 4 with respect to the lower end 8b of the elastic member 8. As shown in FIG. 11, the lower end 8b of the elastic member 8 is disposed between a pair of side wall portions 5f in the orthogonal direction. In other words, the narrowing portion 5d has a pair of side wall portions 5f disposed with the lower end 8b of the elastic member 8 sandwiched therebetween in the orthogonal direction. The pair of side wall portions 5f are disposed symmetrically with the lower end 8b of the elastic member 8 sandwiched therebetween. The ventilation fan 1 has an opening region 9 surrounded by the narrowing portion 5d and the cut and raised portion 4d. The dimension D1 of the opening region 9 along the inward / outward direction is larger than the dimension D2 of the lower end 8b of the elastic member 8 along the inward / outward direction.

[0046] Next, a method for installing the exhaust fan 1 according to the present embodiment will be described with reference to FIG. 9 and FIG. 12 to FIG. 19. FIG. 12 is a vertical cross-sectional view that shows a preparation step of the installation method for the exhaust fan 1 according to the first embodiment. FIG. 13 is a vertical cross-sectional view that shows an insertion step of the installation method for the exhaust fan 1 according to the first embodiment, and shows a state during insertion where the elastic member 8 is in contact with the cut and raised portion 4d. FIG. 14 is a vertical cross-sectional view that shows an insertion step of the installation method for the exhaust fan 1 according to the first embodiment, and shows a state after insertion where the elastic member 8 is located above the cut and raised portion 4d. FIG. 15 is a vertical cross-sectional view that shows a temporary fixing step of the installation method for the exhaust fan 1 according to the first embodiment. FIG. 16 is a horizontal cross-sectional view that shows a temporary fixing step of the installation method for the exhaust fan 1 according to the first embodiment. FIG. 17 is a vertical cross-sectional view that shows a main fixing step of the installation method for the exhaust fan 1 according to the first embodiment. Figure 18 is a vertical cross-sectional view that typically shows a first removal step in the installation method for the ventilation fan 1 according to embodiment 1. Figure 19 is a vertical cross-sectional view that typically shows a second removal step in the installation method for the ventilation fan 1 according to embodiment 1. For simplification, Figures 12 to 19 only show enlarged views of a portion of the ventilation fan body 2, a portion of the mounting member 4, and a portion of the connecting member 5.

[0047] First, a method of installing the ventilation fan 1 will be described as a construction method of the ventilation fan 1. The method of installing the ventilation fan 1 includes an arrangement step, a connection step, a preparation step, an insertion step, a temporary fixing step, and a permanent fixing step.

[0048] 9, the arrangement step is a step of fixing the connecting member 5 to the anchor bolt 18 suspended from the ceiling space 21, and arranging the connecting member 5 in the ceiling space 21. In the arrangement step, the anchor bolt 18 is inserted into the connecting hole 5i from the radial direction of the anchor bolt 18, and the nuts 19 are tightened to sandwich the pair of arm portions 5j between the two nuts 19. As a result, the connecting member 5 is fixed to the anchor bolt 18.

[0049] 9, the connecting step is a step of arranging the mounting member 4 along the opening edge of the installation hole 20a and connecting the anchor bolt 18 and the mounting member 4 with the connecting member 5. In the connecting step, the connecting member 5 and the mounting member 4 are fixed to each other by inserting the fastening member 17 into the fixing hole 4g ​​of the mounting member 4 and the fixing hole 5h of the connecting member 5, and the anchor bolt 18 and the mounting member 4 are connected to each other via the connecting member 5.

[0050] 12, the preparation step is a step of preparing the ventilator fan body 2 below the mounting member 4. In the preparation step, since no external force is applied to the elastic member 8 of the mounting member 4, the lower end portion 8b of the elastic member 8 is located closer to the outer periphery of the mounting member 4 than the cut and raised portion 4d.

[0051] As shown in Fig. 13 and Fig. 14, the insertion step is a step of lifting the ventilator fan body 2 up to the ceiling 20, inserting the ventilator fan body 2 from below the mounting member 4 into the inner periphery of the mounting member 4, and inserting the ventilator fan body 2 into the inner periphery of the mounting member 4 until the lower end 8b of the elastic member 8 passes over the upper end 4e of the cut-and-raised portion 4d. As shown in Fig. 13, when the ventilator fan body 2 is inserted into the inner periphery of the mounting member 4, the lower end 8b of the elastic member 8 comes into contact with the cut-and-raised portion 4d, and the elastic member 8 is bent and elastically deformed so as to enter the inner periphery of the cut-and-raised portion 4d. As shown in Fig. 14, when the ventilator fan body 2 is further inserted into the inner periphery of the mounting member 4, the lower end 8b of the elastic member 8 passes over the upper end 4e of the cut-and-raised portion 4d, and the elastic member 8 is restored to its original shape by the elastic restoring force, and the lower end 8b of the elastic member 8 is located on the outer periphery of the mounting member 4 from the cut-and-raised portion 4d.

[0052] As shown in FIG. 15, the temporary fixing step is a step of lowering the ventilator body 2 after the insertion step, hooking the elastic member 8 on the upper end of the cut-and-raised portion 4d, and temporarily fixing the ventilator body 2 to the mounting member 4. When the ventilator body 2 is lowered from the state shown in FIG. 14, the lower end 8b of the elastic member 8 hooks on the upper end 4e of the cut-and-raised portion 4d as shown in FIG. 15, and the weight of the ventilator body 2 is supported by the cut-and-raised portion 4d via the elastic member 8. In this state, even if the worker releases his / her hand from the ventilator body 2, the ventilator body 2 does not lower any further, and the ventilator body 2 is temporarily fixed to the mounting member 4. That is, in the temporary fixing step, it is not necessary to support the ventilator body 2 with one's hand, and the worker can release his / her hand from the ventilator body 2, so that the fastening member 15 to be used in the next permanent fixing step can be prepared. In the temporary fixing step, the lower end 8b of the elastic member 8 is sandwiched between the narrowed portion 5d and the cut-and-raised portion 4d. This makes it possible to suppress the inclination and rattling of the ventilator body 2. 16, in the temporary fixing step, the lower end 8b of the elastic member 8 contacts the bottom wall 5e of the narrowed portion 5d, and the pair of side wall portions 5f of the narrowed portion 5d are located on both sides of the lower end 8b of the elastic member 8 in the orthogonal direction. This prevents the elastic member 8 from shifting in the orthogonal direction, and prevents the elastic member 8 from coming off the cut-and-raised portion 4d. Even if the elastic member 8 hooked on the cut-and-raised portion 4d shifts in the orthogonal direction, the side surface of the elastic member 8 contacts the side wall portions 5f, thereby preventing the elastic member 8 from coming off the cut-and-raised portion 4d.

[0053] As shown in Fig. 17, the main fixing step is a step of fixing the ventilation fan main body 2 to the mounting member 4 with fastening members 15 after the temporary fixing step. In the main fixing step, the ventilation fan main body 2 is lifted from the state shown in Fig. 16 and brought into close contact with the mounting member 4. In the main fixing step, the mounting flange portion 2h of the ventilation fan main body 2 is brought into close contact with the third flange portion 4c of the mounting member 4, and the fastening members 15 are inserted into the fixing holes 2r of the ventilation fan main body 2 and the fixing holes 4f of the mounting member 4, thereby fixing the ventilation fan main body 2 and the mounting member 4 to each other.

[0054] Next, a method for removing the ventilator main body 2 will be described as an installation method for the ventilator 1. When replacing the fan 2b due to a breakdown or malfunction of the fan 2b, it is necessary to remove the ventilator main body 2 from the mounting member 4. The method for removing the ventilator main body 2 includes a first removal step and a second removal step.

[0055] As shown in FIG. 18, the first removal step is a step of removing the fastening member 16 that fixes the elastic member 8 to the ventilation fan body 2. The dashed line in FIG. 18 shows the position where the fastening member 16 was located before removal. In the first removal step, the fastening member 16 is removed by inserting a hand through the air intake 2f of the housing 2a. When the fastening member 16 is rotated to remove it from the housing 2a of the ventilation fan body 2, the pair of side wall portions 5f of the narrowing portion 5d shown in FIG. 16 are located on both sides of the lower end portion 8b of the elastic member 8 in the perpendicular direction, so that the elastic member 8 is prevented from rotating when the fastening member 16 is removed. That is, when the fastening member 16 is rotated, the side surface of the elastic member 8 comes into contact with the side wall portion 5f, so that the elastic member 8 can be prevented from rotating together with the fastening member 16. 18, when the fastening member 16 is removed, the elastic member 8 comes off the ventilation fan body 2 and falls so that the lower end 8b of the elastic member 8 is positioned between the cut-and-raised portion 4d and the narrowed portion 5d. This makes it possible to prevent the removed elastic member 8 from being lost.

[0056] 19, the second removal step is a step of removing the fastening members 15 after the first removal step, and removing the ventilator fan body 2 from the mounting member 4. When the ventilator fan body 2 is removed from the mounting member 4, the elastic member 8 is positioned between the cut-and-raised portion 4d and the narrowed portion 5d, so that the elastic member 8 can be prevented from being lost.

[0057] Next, the effects of the ventilation fan 1 according to this embodiment will be described.

[0058] In this embodiment, as shown in Figs. 7 and 9, the connecting member 5 has a first wall 5a that extends upward from the inner peripheral edge of the mounting member 4 and is fixed to the side surface 2d of the housing 2a or the mounting member 4, and a second wall 5b that extends from the upper end of the first wall 5a in a direction away from the ventilator main body 2 and has a connecting hole 5i into which the anchor bolt 18 is inserted. In this embodiment, as shown in Fig. 9, the first wall 5a has an opening 5c ​​that allows the connecting hole 5i to be seen when the first wall 5a is viewed from the installation hole 20a. With these configurations, when inserting the anchor bolt 18 into the connecting hole 5i, the connecting hole 5i can be seen through the opening 5c ​​of the first wall 5a. Therefore, the workability when inserting the anchor bolt 18 into the connecting hole 5i of the connecting member 5 is improved, and construction costs and construction work can be reduced.

[0059] In this embodiment, as shown in Fig. 9, when the line connecting the intersection point O between the central axis A of the anchor bolt 18 and the second wall 5b and the center C of the opening on the indoor side of the installation hole 20a is taken as a virtual line L1, the virtual line L1 passes through the first wall 5a, and the position of the virtual line L1 passing through the first wall 5a overlaps with the upper edge of the opening 5c. This allows the innermost part of the connecting hole 5i to be visually confirmed. Therefore, the anchor bolt 18 can be inserted to the innermost part of the connecting hole 5i, and the anchor bolt 18 can be fixed to the connecting member 5 at the innermost part of the connecting hole 5i.

[0060] In this embodiment, as shown in Fig. 9, when the virtual line L1 is rotated downward by 5° to 30° with the center C of the indoor opening of the installation hole 20a as the base point, the virtual line L2 obtained by rotating the virtual line L1 passes through the first wall 5a, and the position of the virtual line L2 that passes through the first wall 5a overlaps with the lower edge of the opening 5c. This allows the entrance side opening part of the connection hole 5i to be visually confirmed. This makes it easier to insert the anchor bolt 18 into the connection hole 5i.

[0061] 6 may be changed as appropriate. For example, the mounting member 4 may be arranged on the surface of the ceiling 20 facing the attic space 21. In such a configuration, the first flange portion 4a contacts the surface of the ceiling 20 facing the attic space 21.

[0062] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies. Parts of the configurations may be omitted or modified without departing from the spirit of the invention. [Explanation of symbols]

[0063] 1 Ventilator, 2 Ventilator body, 2a Housing, 2b Fan, 2c Top, 2d Side, 2e Bottom, 2f Intake port, 2g Exhaust port, 2h Mounting flange, 2i Fan casing, 2j Motor, 2k Blade, 2m Intake port, 2n Outlet, 2o Spring fixing part, 2p Shaft, 2q, 8a Insertion hole, 2r, 4f, 4g, 5h Fixing hole, 2s Support part, 2t Protective wall, 3 Duct connection member, 3a Vertical wall, 3b Connection part, 4 Mounting member, 4a First flange part, 4b Second flange part, 4c Third flange part, 4d Cut-out part, 4e Upper end part, 4h Side, 5 Connecting member, 5a First wall, 5b Second wall, 5c Opening, 5d Throttling part, 5e Bottom wall part, 5f Side wall portion, 5g flat portion, 5i connecting hole, 5j arm portion, 5k stopper portion, 6 decorative grill, 6a lattice portion, 6b frame portion, 6c spring, 7 shutter, 8 elastic member, 8b lower end portion, 9 opening area, 10 terminal cover, 10a rotating shaft, 10b finger hook portion, 11 power connection device, 12 motor wire, 13 bushing, 14 duct, 15, 16, 17 fastening members, 18 anchor bolt, 19 nut, 20 ceiling, 20a installation hole, 21 ceiling space.

Claims

1. A ventilation fan that is installed on a ceiling using an installation hole formed in the ceiling, A ventilation fan body having a box-shaped housing having an intake port for taking in indoor air and an exhaust port for exhausting the intake air, and a fan disposed inside the housing; A frame-shaped mounting member is disposed along an opening edge of the installation hole, and the ventilation fan main body is inserted into an inner peripheral side of the mounting member; A connecting member that connects the mounting member to an anchor bolt suspended in a ceiling space formed above the ceiling; Equipped with The connecting member has a first wall extending upward from an inner peripheral edge of the mounting member and fixed to a side surface of the housing or the mounting member, and a second wall extending from an upper end of the first wall in a direction away from the ventilation fan main body and having a connecting hole into which the anchor bolt is inserted, A ventilation fan, characterized in that an opening is formed in the first wall through which the connecting hole can be seen when the first wall is viewed from the installation hole.

2. When a line connecting the intersection point between the central axis of the anchor bolt and the second wall and the center of the opening of the installation hole on the indoor side is defined as a virtual line, the virtual line passes through the first wall, The ventilation fan according to claim 1 , wherein a position of the imaginary straight line passing through the first wall overlaps with an upper edge of the opening.

3. When the virtual line is rotated downward by 5° to 30° with the center of the opening of the installation hole on the indoor side as a base point, the virtual line passes through the first wall, The ventilation fan according to claim 2 , wherein a position of the imaginary straight line passing through the first wall overlaps with a lower edge of the opening.

4. A connecting member that connects an anchor bolt suspended in a ceiling space formed above the ceiling to a frame-shaped mounting member that is arranged along an opening edge of an installation hole formed in the ceiling and into which a ventilation fan body having a box-shaped housing and a fan arranged inside the housing is inserted, the connecting member has a first wall extending upward, and a second wall extending from an upper end of the first wall in a direction intersecting the first wall and having a connecting hole formed therein, into which the anchor bolt is inserted, A connecting member, characterized in that an opening through which the connecting hole can be visually observed is formed in the first wall.

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