JP4093674B2 - Caulking nut mounting structure and air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a caulking nut mounting structure, and further includes an air that is installed on a ceiling portion of a building, includes a heat exchanger and a fan inside, and guides and blows out the heat-exchanged air to an appropriate position in a room through a blowout duct. It relates to a harmony machine.
[0002]
[Prior art]
In general, a built-in type air conditioner in which a blowout duct is extended in a unit body that is installed in a ceiling space of a building and accommodates an indoor heat exchanger and a fan is known. In such a built-in type air conditioner, the air heat-exchanged by the indoor heat exchanger can be guided to the appropriate position in the room through the blowout duct and blown into the room, so that it is optimal without impairing the aesthetics of the room. Air conditioning can be realized.
[0003]
Conventionally, this type of built-in type air conditioner includes a panel specification built-in type air conditioner 10 and a duct specification built-in type air conditioner 20, as shown in FIG. The panel specification built-in type air conditioner 10 (FIG. 8A) is provided on the lower surface of the unit body 11 and sucks room air from the ceiling panel 12 installed on the ceiling plate. Arranged inside the main body 11. On the other hand, the duct specification built-in type air conditioner 20 (FIG. 8B) is provided with a suction duct 22 on the back surface of the unit main body 21 and sucks indoor air through the suction duct 22. It is installed on the outer surface of the side plate of the unit main body 21.
[0004]
By the way, the unit main body 11 of the panel specification built-in type air conditioner 10 and the unit main body 21 of the duct specification built-in type air conditioner 20 are configured by attaching a heat insulating material to the surface of a steel plate. For this reason, for example, when the ceiling panel 12 is attached to the unit main body 11 of the panel specification built-in type air conditioner 10, if the caulking nut is attached to the unit main body by a normal method, the caulking strength of the caulking nut becomes insufficient. Rotational torque strength cannot be ensured to a practically satisfactory level.
[0005]
Therefore, the ceiling panel 12 is attached to the unit main body 11 by first welding a nut to the steel plate of the unit main body 11 and then sticking a heat insulating material to the surface of the steel plate to ensure the rotational torque strength of the nut. You are doing.
[0006]
[Problems to be solved by the invention]
However, in such a method, the operation of attaching the nut to the unit main body 11 becomes very complicated.
[0007]
In view of the above-described circumstances, the object of the invention described in claim 1 is to be able to secure the rotational torque strength of the caulking nut satisfactorily even if the base material has a heat insulating material attached to the surface of the metal plate. The object of the invention according to claim 3 is to provide a nut mounting structure, and can securely attach a component to a box body of a unit main body to which a heat insulating material is attached using a caulking nut and a bolt. It is to provide an air conditioner.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a caulking nut mounting structure in which a caulking nut is inserted into a pilot hole formed in the base material, and is caulked and fixed, and the caulking nut is attached to the base material. A heat insulating material is attached to the surface, a notch is formed in the pilot hole, and the caulking nut is inserted into the pilot hole with its head abutting against the metal plate . A caulking deformation portion is located on the heat insulating material side, and the caulking deformation portion is deformed at a position where the distance between the caulking deformation portion and the head is substantially the same as the thickness of the base material, and is caulked in the notch. A caulking nut mounting structure characterized by being fixed .
[0009]
The invention according to claim 2 is characterized in that, in the invention according to claim 1, a plurality of notches are formed in the periphery of the pilot hole.
[0010]
According to a third aspect of the present invention, there is provided an air conditioner in which a blowout duct is extended to a unit main body that is installed on a ceiling portion of a building and accommodates a heat exchanger and a fan. Is configured by arranging a base material having a heat insulating material attached to the surface of a metal plate in a frame shape, and a base hole for attaching a caulking nut having a notch is formed in the base material. The head is brought into contact with the metal plate and is inserted into the pilot hole, and the caulking deformation portion of the caulking nut is located on the heat insulating material side. The caulking deformation portion includes the caulking deformation portion and the head. The air conditioner is deformed at a position where the distance is substantially the same as the thickness of the base material and is caulked and fixed to the notch .
[0011]
The invention according to claim 4 is the invention according to claim 3, wherein the pilot hole is formed with a plurality of notches on the periphery thereof.
The invention according to claim 1 or 2 has the following effects.
[0012]
A notch is formed in the pilot hole provided in the base metal, and the caulking nut is inserted into the base hole with its head abutting against the metal plate of the base metal and fixed by caulking to the base metal. When the caulking is fixed, the caulking deformed portion bites into the notch in the prepared hole while the head of the caulking nut is in contact with the metal plate of the base material, so that the caulking strength of the caulking nut can be increased. As a result, even if the base material has a heat insulating material adhered to the surface of the metal plate, the rotational torque strength of the caulking nut attached to the base material can be ensured within a practically unaffected range. .
[0013]
The invention according to claim 3 or 4 has the following effects.
[0014]
A notch is formed in the pilot hole provided in the box of the unit body, and the caulking nut is inserted into the pilot hole with its head abutting against the metal plate of the box, and is fixed by caulking to the unit body. When the caulking nut is caulked and fixed, the caulking deformed portion bites into the notch of the prepared hole while the head of the caulking nut is in contact with the metal plate of the box, so that the caulking strength of the caulking nut can be increased. As a result, even if the box body of the unit main body has a heat insulating material attached to the surface of the metal plate, the rotational torque strength of the caulking nut attached to the box body can be ensured within a range that does not impede practically. For this reason, components can be reliably attached to the box body of the unit body using a bolt or the like corresponding to the caulking nut.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 shows a built-in type air conditioner to which a first embodiment of an air conditioner according to the present invention is applied. (A) is a panel specification built-in type air conditioner, and (B) is a duct specification built-in type. It is a side view which shows an air conditioner, respectively.
[0017]
The panel specification built-in air conditioner 30 shown in FIG. 1A and the duct specification built-in air conditioner 40 shown in FIG. 1B both have a ceiling between the ceiling 32 and the ceiling plate 33 of the building 31. The unit 34 is suspended in the space 34 and has a unit main body 35, a blowout duct 36, and an electrical control box 37 for operation control.
[0018]
The box body 54 of the unit main body 35 has a top plate 39 at the upper edge portion of four side plates 38 that are arranged opposite to each other and provided in a square frame shape, and a drain pan presser plate 46 at a part of the lower edge portion. Fixed and configured. A heat insulating material is attached to the inner and outer surfaces, or the inner or outer surface (the outer surface in the present embodiment) of the side plate 38, the top plate 39, and the drain pan presser plate 46.
[0019]
A hanging metal fitting 41 is fixed to the side plate 38 of the box body 54 of the unit main body 35. The hanging metal fitting 41 is fixed to a hanging bolt 42 suspended from the ceiling 32 of the building 31, so that the panel specification built-in type air conditioner is attached. The machine 30 and the duct specification built-in type air conditioner 40 are configured to be suspended from the ceiling 32 of the building 31.
[0020]
The unit main body 35 is configured such that an indoor heat exchanger 55, a fan 56, and a fan motor (not shown) shown in FIG. The indoor heat exchanger 55 uses a refrigerant pipe (gas pipe) connected to the refrigerant pipe connection port 43 shown in FIGS. 2 and 3 and a refrigerant pipe (liquid pipe) connected to the refrigerant pipe connection port 44. , Connected to an outdoor unit (not shown). The indoor heat exchanger 55 of the unit main body 35 cools or heats the air sucked into the unit main body 35 as will be described later by evaporation or condensation of the refrigerant guided from the outdoor unit.
[0021]
2 and 3, reference numeral 45A indicates a drain piping connection port, and reference numeral 45B indicates a drain discharge port.
[0022]
A plurality of the blowout ducts 36 shown in FIG. 1 are usually extended from the unit main body 35. Each of the blowout ducts 36 is fitted at one end to a blowout port 47 (FIGS. 2 and 3) integrally installed on one side plate 38A of the box body 54 of the unit main body 35, and a blowout grill 48 is attached to the other end. It is done. The blowing grill 48 is installed at an appropriate position on the ceiling board 33. The rotation of the fan of the unit main body 35 causes room air to be sucked into the unit main body 35 as will be described later, and the air heat-exchanged by the indoor heat exchanger is blown out from the blow grill 48 into the room through the blow duct 36.
[0023]
By the way, the panel specification built-in type air conditioner 30 shown in FIG. 1 (A) and FIG. 2 has a ceiling panel 49 attached to the lower opening of the unit body 35 (details will be described later). The ceiling panel 49 includes a suction plate 50 at a central position, and sucks room air through a gap with the suction plate 50 and introduces it into the unit body 35.
[0024]
Moreover, the duct specification built-in type air conditioner 40 shown to FIG. 1 (B) and FIG. 3 is the side plate (one side plate 38 of the box body 54 of the unit main body 35) facing the side plate 38A in which the blower outlet 47 was installed ( That is, a suction opening (not shown) is formed in the rear side plate 38B of the duct specification built-in type air conditioner 40, and a single suction duct 52 is usually provided in the side plate 38 (back side plate 38B) via, for example, the filter box 51. It is something that was installed. A suction grill 53 is fitted to one end of the suction duct 52, and the suction grill 53 is installed at an appropriate position on the ceiling plate 33. Indoor air is taken in from the suction grille 53 and sucked into the unit main body 35 through the suction duct 52.
[0025]
The lower opening of the unit main body 35 of the duct specification built-in type air conditioner 40 is closed by a wind shielding plate 57. In the present embodiment, a heat insulating material is also attached to the outside of the wind shielding plate 57. Further, as shown in FIG. 1, the electrical box 37 is attached to a side plate 38 </ b> C in which the blowout duct 36 or the suction duct 52 is not provided among the side plates 38 of the unit body 35.
[0026]
Now, as shown in FIG. 4, the ceiling panel 49 uses a caulking nut 60 fixed around the lower opening of the box body 54 of the unit main body 35, and a mounting bolt 61 screwed into the caulking nut 60. It is attached to the box body 54 of the unit main body 35.
[0027]
As shown in FIG. 6, a heat insulating material 63 is attached to the surface of a steel plate 62 as a metal plate on the side plate 38 as a base material of the box 54 to which the caulking nut 60 is fixed. Further, a pilot hole 64 for attaching the caulking nut 60 is formed in the side plate 38. As shown in FIG. 5, in this pilot hole 64, four notches 65 are formed continuously at the four-peripheral positions on the peripheral edge or two notches 65 at the two-uniform positions. Has been.
[0028]
As shown in FIG. 6, the caulking nut 60 abuts the head 60 </ b> A against the steel plate 62 of the side plate 38 in the box 54 and is inserted into the prepared hole 64, and is caulked and fixed to the side plate 38. When the caulking is fixed, the caulking deformed portion 60B of the caulking nut 60 bites into the notch 65 of the prepared hole 64, and the caulking strength is increased. As a result, the rotational torque strength of the caulking nut 60 that is caulked and fixed to the side plate 38 of the box body 54 is ensured within a range where there is no practical problem.
[0029]
For example, FIG. 5 shows that when the diameter D of the pilot holes 64 is 7.1 mm and the radius R of the notch 65 is 1.0 mm or 0.5 mm, the pilot holes 64 are inserted and fixed by caulking. The rotational torque strength of the caulking nut 60 is shown. As shown in FIG. 5, when there is no notch 65 in the pilot hole 64 having a diameter D of 7.1 mm, the rotational torque strength of the caulking nut 60 inserted into the pilot hole 64 and fixed by caulking is as follows. The average is 25.7 kg / cm, which is extremely low and causes practical problems.
[0030]
On the other hand, when there are four notches 65 in the pilot hole 64 having a diameter D of 7.1 mm and the radius R of the notch 65 is 1.0 mm, it is inserted into the pilot hole 64 and fixed by caulking. The rotational torque strength of the crimped nut 60 is 74.9 kg / cm on average, indicating that it is the most excellent.
[0031]
Therefore, according to the said embodiment, there exists the following effect.
[0032]
A notch 65 is formed in a pilot hole 64 provided in the side plate 38 of the box body 54 of the unit body 35, and the caulking nut 60 abuts the head 60 </ b> A against the steel plate 62 of the side plate 38 of the box body 54. Since the head 60A of the caulking nut 60 is in contact with the steel plate 62 of the side plate 38 when the caulking nut 60 is caulked and fixed, the caulking deformed portion 60B is inserted into the side plate 38. Bites into the notch 65 of the pilot hole 64, so that the caulking strength of the caulking nut 60 can be increased. As a result, the rotational torque strength of the caulking nut 60 attached to the side plate 38 is ensured within a practically unobstructed range even for the side plate 38 of the box 54 in which the heat insulating material 63 is adhered to the surface of the steel plate 62. it can. For this reason, the ceiling panel 49 can be reliably attached to the box 54 of the unit main body 35 by using the attachment bolt 61 or the like corresponding to the caulking nut 60.
[0033]
As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this. For example, the notch 65 is not limited to a semicircular shape, and may be a square shape or a triangular shape.
[0034]
Moreover, although the case where the ceiling panel 49 was attached to the unit main body 35 of the panel specification built-in type air conditioner 30 was described in the said embodiment, other components are attached to the unit main body 35 of the duct specification built-in type air conditioner 40. In some cases, the present invention may be applied to the case where the caulking nut 60 is caulked and fixed to a metal plate having a heat insulating material 63 attached to the surface.
[0035]
【The invention's effect】
As described above, according to the caulking nut mounting structure according to the first aspect of the present invention, the base material is formed by attaching the heat insulating material to the surface of the metal plate, and the notch is formed in the prepared hole. Since the caulking nut is inserted into the pilot hole with its head abutting against the metal plate and caulked and fixed to the base material, even if the base material has a heat insulating material attached to the surface of the metal plate, The rotational torque strength of the caulking nut can be secured satisfactorily.
[0036]
According to the air conditioner pertaining to the invention described in claim 3, the box body of the unit body is configured by sticking a heat insulating material to the surface of the metal plate, and the box body is provided with a notch. A pilot hole for attaching the nut is formed, and the caulking nut is inserted into the pilot hole with its head abutting against the metal plate, and is caulked and fixed to the unit main body. Parts can be securely attached to the box using caulking nuts and bolts.
[Brief description of the drawings]
FIG. 1 shows a built-in type air conditioner to which an embodiment of an air conditioner according to the present invention is applied, in which (A) is a panel specification built-in type air conditioner, and (B) is a duct specification built-in type air conditioner. It is each side view of a machine.
FIG. 2 is a perspective view showing a unit main body of the panel specification built-in type air conditioner in FIG.
FIG. 3 is a perspective view showing a unit main body of the duct specification built-in type air conditioner in FIG.
4 is an exploded side view showing a state of attachment of the ceiling panel to the unit main body shown in FIG. 2. FIG.
5 is a front view showing a pilot hole for a caulking nut formed in the unit main body 35 of FIG. 4; FIG.
FIG. 6 is a cross-sectional view showing a state in which a caulking nut is attached.
FIG. 7 is a chart showing the rotational torque strength of the caulking nut.
8A and 8B are partial perspective views of a conventional built-in type air conditioner, in which FIG. 8A is a panel type built-in type air conditioner, and FIG. 8B is a duct type built-in type air conditioner.
[Explanation of symbols]
30 Panel Design Built-in Air Conditioner 31 Building 32 Ceiling 34 Ceiling Space 35 Unit Body 36 Duct Duct 40 Duct Specifications Built-in Air Conditioner 54 Box 49 Ceiling Panel 54 Box 60 Caulking Nut 60A Head 60B Caulking Deformation 61 Installation Bolt 62 Steel plate (metal plate)
63 Insulation material 64 Pilot hole 65 Notch

Claims (4)

In the caulking nut mounting structure, the caulking nut is inserted into the pilot hole formed in the base material, and the caulking nut is attached to the base material by caulking and fixing.
The base material has a heat insulating material attached to the surface of a metal plate, and a notch is formed in the pilot hole.
The caulking nut is inserted into the pilot hole with its head abutting against the metal plate, and the caulking deformation part of the caulking nut is located on the heat insulating material side, and the caulking deformation part includes the caulking deformation part and the caulking deformation part. A caulking nut mounting structure, wherein the caulking nut is deformed at a position where the distance from the head is substantially the same as the thickness of the base material and is caulked and fixed to the notch .   The caulking nut mounting structure according to claim 1, wherein a plurality of notches are formed in the periphery of the pilot hole. In an air conditioner installed on the ceiling of a building and having a blowout duct extended to a unit body configured to accommodate a heat exchanger and a fan,
The box body of the unit body is configured by arranging a base material with a heat insulating material attached to the surface of a metal plate in a frame shape, and a pilot hole for attaching a caulking nut with a notch is formed in this base material And
The caulking nut is inserted into the pilot hole with its head abutting against the metal plate, and the caulking deformation part of the caulking nut is located on the heat insulating material side, and the caulking deformation part includes the caulking deformation part and the caulking deformation part. An air conditioner, wherein the air conditioner is deformed at a position where a distance from the head is substantially the same as a thickness of the base material and is caulked and fixed to the notch .   The air conditioner according to claim 3, wherein a plurality of notches are formed in the periphery of the pilot hole.

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