JP2024055387A - Triangular ducts, hanging bands for triangular ducts, and corner pieces for triangular ducts - Google Patents

Abstract

[Problem] To provide a triangular duct that allows for reduced material costs, improved installation flexibility, and improved design. [Solution] Three wall panels 2 are arranged so that the cross section is a generally triangular tubular shape, a first seam 21 is formed on the side edge of one adjacent wall panel 2, and a second seam 22 is formed on the side edge of the other adjacent wall panel 2, and the three wall panels 2 are joined together by fitting the first seam 21 and the second seam 22 together. [Selected Figure] Figure 2

Description

The present invention relates to a triangular duct with a substantially triangular cross section, a hanging band for a triangular duct, and a corner piece for a triangular duct.

Conventionally, rectangular air conditioning ducts have a roughly rectangular cross section and are formed into a square tube by assembling four wall panels (see, for example, Patent Document 1).

"Standard Duct Text" edited and published by the National Duct Industry Association, April 2015, pp. 29-32

Conventional square ducts require four wall panels, which increases material and manufacturing costs. In particular, the recent rise in the cost of steel and other materials has significantly increased material and manufacturing costs, putting pressure on duct manufacturers. Furthermore, many materials are processed when manufacturing square ducts, and many of these materials must be disposed of or recycled after the square ducts are used, which places a heavy burden on the environment.

In addition, because conventional rectangular ducts have a roughly rectangular tubular cross section, a large space of a specific shape is required to install the duct. For example, to install a straight rectangular duct by hanging it horizontally from the ceiling, a large rectangular space must be available below the ceiling, which limits the installation location and places restrictions on the design and component placement around the ceiling.

Furthermore, conventional square ducts were only available in cylindrical shapes with roughly square cross sections, which meant they had poor design qualities and could not be adapted to a variety of building designs.

The present invention aims to provide a triangular duct, a hanging band for a triangular duct, and a corner piece for a triangular duct that allows for reduced material costs, increased flexibility in installation, and improved design.

In order to achieve the above object, the invention described in claim 1 is a triangular duct characterized in that three wall panels are arranged so that the cross section is a generally triangular tubular shape, a first seam is formed on the side edge of one adjacent wall panel, a second seam is formed on the side edge of the other adjacent wall panel, and the three wall panels are joined by fitting the first seam and the second seam together.

The invention described in claim 2 is characterized in that in the triangular duct described in claim 1, the direction in which the gas flows is the axial direction, and flange portions are formed at the ends of the three wall panels in the axial direction, rising approximately perpendicular to the axial direction, for connection to an external member.

The invention described in claim 3 is characterized in that in the triangular duct described in claim 1, the three wall panels are arranged so that the cross section is a substantially equilateral triangle.

The invention described in claim 4 is characterized in that in the triangular duct described in claim 1, the three wall panels are formed so that the gas flow direction is the axial direction and the axial direction is curved in an arc shape.

The invention described in claim 5 is a hanging band for a triangular duct described in any one of claims 1 to 4, which is arranged by supporting the base of the approximately triangular cross section with a rod-shaped hanging device, and is characterized in that it is arranged in a straight band shape along the base, both ends protruding from both ends of the base, and both ends are provided with connection parts for connecting the hanging device.

The invention described in claim 6 is a triangular duct suspension band for suspending the triangular duct described in any one of claims 1 to 4 by supporting the apex of the approximately triangular cross section with a rod-shaped suspension device, characterized in that it comprises a V-shaped portion having an approximately V-shape to which the apex is attached, and horizontal portions extending outward from both ends of the V-shaped portion and provided with connection portions for connecting the suspension device.

The invention described in claim 7 is a corner piece for a triangular duct for connecting adjacent flange parts of the triangular duct described in claim 2, characterized in that it is flat and formed in a roughly V-shape with an angle equal to the apex angle of the triangular duct, and has a hole for inserting a bolt in the central part exposed between the adjacent flange parts when disposed on the back surface of the adjacent flange parts.

According to the invention described in claim 1, a triangular duct is formed by joining three wall panels together, so a strong rectangular duct can be manufactured using only three wall panels, making it possible to reduce material and manufacturing costs. Similarly, it is possible to reduce the amount of waste and recycling required after use, thereby reducing the environmental impact.

In addition, because it is a rectangular duct with a roughly triangular cross section, it can be installed in a smaller space than conventional rectangular ducts with a roughly square cross section, or in spaces that are not rectangular (even irregularly shaped spaces). This increases the flexibility of the installation location, and also increases the flexibility of the design around the ceiling and the placement of components.

Furthermore, because the cross section is an approximately triangular square duct, it offers improved design options and can be adapted to a variety of building designs.

According to the invention described in claim 2, flanges are formed at the axial ends of the three wall panels, making it possible to easily and properly connect to external components (e.g., ducts and air conditioning equipment) via these flanges.

According to the invention described in claim 3, since the cross section of the triangular duct is an approximately equilateral triangle, it is possible to manufacture the triangular duct using three wall panels of the same shape and structure, which makes it possible to further reduce material and manufacturing costs. Moreover, since the cross section is an approximately equilateral triangle, it is possible to easily and properly install the duct at the construction site without having to worry about the direction.

According to the invention described in claim 4, the axial direction of the triangular duct is curved in an arc, so the direction of gas flow can be changed, making it possible to apply the triangular duct to a variety of uses and needs.

According to the invention described in claim 5, by arranging a triangular duct hanging band along the base of the triangular duct and connecting a hanging device to the connection parts at both ends of the triangular duct hanging band, it is possible to support the base of the triangular duct and provide a stable and strong arrangement.

According to the invention described in claim 6, by attaching the V-shaped portion of the triangular duct suspension band to the apex of the cross section of the triangular duct and connecting a suspension tool to the connection portion of the horizontal portion of the triangular duct suspension band, it is possible to support the apex of the triangular duct and to arrange it stably and firmly. Moreover, since the apex of the triangular duct is supported, it is possible to prevent the triangular duct from moving in the width direction (a direction approximately perpendicular to the axial direction).

According to the invention described in claim 7, by arranging and fixing the corner piece for triangular duct to the back surface of the adjacent flange portion, it is possible to connect and fix the adjacent flange portions (wall panels) and form a strong triangular duct with three wall panels. In addition, by inserting a bolt into the hole in the center of the corner piece for triangular duct and fastening it to an external member (e.g., a duct or air conditioning equipment), it is possible to easily and properly connect it to the external member.

1 is a schematic perspective view showing a triangular duct according to a first embodiment of the present invention; FIG. 2 is a diagram showing a single seam and a double seam of the triangular duct of FIG. 1. FIG. 3 is a diagram showing a joining state by a single seam and a double seam in FIG. 2 . FIG. 2 is a front view showing a corner piece for a triangular duct for connecting adjacent flange portions of the triangular duct of FIG. 1 . FIG. 5 is a front view showing a state in which the corner piece for a triangular duct of FIG. 4 is disposed on an adjacent flange portion. 5A and 5B are a front view and a plan view showing a suspension band for a triangular duct according to a second embodiment of the present invention; 13A and 13B are a front view and a plan view showing a suspension band for a triangular duct according to a third embodiment of the present invention; 13A is a schematic plan view showing a triangular duct according to a fourth embodiment of the present invention, and FIG. 13B is a view seen from the AA direction.

The present invention will be described below based on the illustrated embodiment.

(Embodiment 1)
1 is a schematic perspective view showing a triangular duct 1 according to this embodiment. The triangular duct 1 is an air conditioning duct having a cylindrical cross section (cross section perpendicular to the axial direction) that is substantially triangular, and three wall panels 2 are disposed and assembled so that the cross section has a substantially triangular cylindrical shape.

In this embodiment, the case where three wall panels 2 are arranged so that the cross section is a substantially equilateral triangle, that is, the cross section of the triangular duct 1 is a substantially equilateral triangle, will be mainly described, but other triangles such as an isosceles triangle or a scalene triangle may also be used. Also, in this embodiment, the case where the triangular duct 1 is a straight pipe in which the axial direction (axis line) D, which is the direction in which the gas flows, extends straight, will be described.

The three wall panels 2 are of the same shape and size, and are generally rectangular, with a first seam formed on the side edge (long side) of one adjacent wall panel 2, and a second seam formed on the side edge of the other adjacent wall panel 2. In this embodiment, the three wall panels 2 are arranged such that the first seam is formed on one side edge of each wall panel 2, and the second seam is formed on the other side edge, with the first seam and the second seam next to each other.

In this way, the first and second seams, or either the first or second seam, may be formed on both side edges of each wall panel 2 so that the first seam and the second seam are adjacent to each other. Therefore, only the first seam may be formed on both side edges of the first wall panel 2, only the second seam may be formed on both side edges of the second wall panel 2, and the first seam may be formed on one side edge of the third wall panel 2 and the second seam may be formed on the other side edge. However, in this case, three wall panels 2 with different shapes and structures must be manufactured, which increases manufacturing and management costs, so it is preferable to form the first seam on one side edge of each wall panel 2 and the second seam on the other side edge, as in this embodiment.

Specifically, as shown in FIG. 2, the first seam is a single seam 21 in which the side edge of the wall panel 2 is bent at a specified angle. Here, the specified angle is an angle equal to the apex angle of the cross section of the triangular duct 1, which is 60 degrees in this embodiment.

The second seam is formed by folding the side edge of the wall panel 2 twice and then folding it three times to form a double seam 22. Here, the outermost outer end 22a of the triple-folded seam is flush with the center (unfolded portion) of the wall panel 2 and is formed to protrude further than the double-folded portion. Also, an installation space 22b is provided between the outer end 22a and the double-folded portion to insert and install the single seam 21.

The three wall panels 2 are joined and assembled by fitting adjacent single seams (first seam) 21 and double seams (second seam) 22 together. That is, as shown in FIG. 3, the single seam 21 is inserted into the mounting space 22b of the double seam 22, and the free end of the outer end 22a is bent toward the single seam 21, so that the single seam 21 and the double seam 22 are joined together and the three wall panels 2 are assembled.

Furthermore, flanges 23 are formed at the ends of the axial direction D of each wall panel 2, rising approximately perpendicular to the axial direction D and for connecting to external members (e.g., ducts or air conditioning equipment). That is, as shown in FIG. 1, both ends (both short sides) of the wall panel 2 in the axial direction D are bent outward by approximately 90 degrees to form the flanges 23, thereby forming flanges 23 that extend outward along both opening edges of the triangular duct 1. Here, the free end side and upper side of the flanges 23 may be bent approximately parallel to the wall panel 2 to make it easier to attach the triangular duct corner pieces 3 described below.

Next, we will explain the triangular duct corner piece 3, which is used to connect adjacent flange portions 23 of a triangular duct 1 configured in this way.

As shown in FIG. 4, the triangular duct corner piece 3 is flat and formed in a roughly V-shape with an angle equal to the apex angle of the triangular duct 1. That is, the planar shape is a roughly V-shaped flat plate, with two roughly rectangular mounting parts 32 extending in a V-shape from the central part 31, and the interior angle θ between the mounting parts 32 is set to the same angle as the apex angle of the triangular duct 1, which is 60 degrees in this embodiment.

In addition, a bolt insertion hole 33 for inserting a bolt is formed in the central portion 31 that is exposed between the adjacent flange portions 23 when disposed on the back surface (the surface that does not contact an external member) of the adjacent flange portions 23. The diameter of this bolt insertion hole 33 is formed so that a bolt used to connect the triangular duct 1 to an external member can be inserted.

Furthermore, at the inner corner edge of the triangular duct corner piece 3, i.e., at the inner corner edge where the mounting parts 32 meet, a flange part 34 is formed that is L-shaped with an inner angle θ and extends toward the back side (towards the seams 21 and 22), thereby increasing the joint strength and rigidity of the adjacent wall panels 2. In addition, ribs extending toward the back side may be formed on the inner and outer side edges of both mounting parts 32 to make it easier to attach the triangular duct corner piece 3 to the flange part 23.

To connect the flanges 23 of the triangular duct 1 together using such a triangular duct corner piece 3, first, as shown in Figure 5, the front side of the triangular duct corner piece 3 is placed on the back of the adjacent flanges 23. This causes the flanges 34 of the triangular duct corner piece 3 to abut against the corners and ridges (ridge joints) of the adjacent wall panels 2, and the center 31 of the triangular duct corner piece 3 is exposed between the adjacent flanges 23.

Next, the triangular duct corner piece 3 is fixed to the flange portion 23 of the triangular duct 1. Any fixing method or means may be used, but in this embodiment, it is fixed by crimping. That is, the free end (upper portion) 23a of the flange portion 23 is bent toward the mounting portion 32 of the triangular duct corner piece 3 and crimped to fix the triangular duct corner piece 3. At this time, as described above, by bending the free end side of the flange portion 23 in advance or by providing a rib portion in advance on the mounting portion 32, it is possible to perform crimping easily and properly.

As described above, according to this triangular duct 1, three wall panels 2 are joined together to form the triangular duct 1, so a strong rectangular duct can be manufactured using only three wall panels 2, making it possible to reduce material and manufacturing costs. Similarly, it is possible to reduce the amount of waste and recycling required after use, thereby reducing the environmental impact.

In addition, because it is a rectangular duct with a roughly triangular cross section, it can be installed in a smaller space than conventional rectangular ducts with a roughly square cross section, or in spaces that are not rectangular (even irregularly shaped spaces). This increases the flexibility of the installation location, and also increases the flexibility of the design around the ceiling and the placement of components.

Furthermore, because the cross section is an approximately triangular square duct, it offers improved design options and can be adapted to a variety of building designs.

Furthermore, flange portions 23 are formed at the ends of the three wall panels 2 in the axial direction D, making it possible to easily and properly connect to external components (e.g., ducts and air conditioning equipment) via these flange portions 23.

Furthermore, because the cross section of the triangular duct 1 is an approximately equilateral triangle, it is possible to manufacture the triangular duct 1 using three wall panels 2 of the same shape and structure, which makes it possible to further reduce material and manufacturing costs. Moreover, because the cross section is an approximately equilateral triangle, construction can be carried out easily and appropriately at the construction site without having to worry about the direction.

On the other hand, with this triangular duct corner piece 3, it is possible to connect and fix the adjacent flange portions 23 (wall panels 2) by disposing and fixing them to the backs of the adjacent flange portions 23, and to form a strong triangular duct 1 with three wall panels 2. Also, by inserting a bolt into the bolt insertion hole 33 in the center portion 31 of the triangular duct corner piece 3 and fastening it to an external member, it is possible to easily and properly connect it to an external member.

(Embodiment 2)
6A and 6B are a front view and a plan view of the triangular duct hanging band 4 according to this embodiment. The triangular duct hanging band 4 is a band for supporting the triangular duct 1 of the first embodiment at the base of the approximately triangular cross section of the triangular duct 1 and suspending it with a rod-shaped suspender H. In this embodiment, a case will be described in which the triangular duct 1 is suspended so that the base of the approximately triangular cross section extends approximately horizontally.

The triangular duct suspension band 4 is made of steel plate and is a straight belt-like body, the length of which is set so that when it is placed along the base of the triangular duct 1 (the base of the triangle), both ends 41 protrude from both ends of the base of the triangular duct 1. In addition, both ends 41 are formed with a suspension tool insertion hole (connection part) 42 for connecting the suspension tool H.

That is, in this embodiment, the suspender H is composed of a long rod screw, and the upper end is disposed and fixed to the ceiling or the like. The suspender insertion holes 42 are holes into which the suspender H can be inserted, and the lower end of the suspender H is inserted into both suspender insertion holes 42, and a nut or the like is attached to the lower end of the suspender H, so that the triangular duct suspending band 4 extends approximately horizontally. The triangular duct 1 is placed on the triangular duct suspending band 4 so that the base of the triangular duct 1 is in contact with the triangular duct 1, and the triangular duct 1 is suspended with the base supported. Note that multiple triangular duct suspending bands 4 are disposed depending on the length, weight, etc. of the triangular duct 1.

In this way, with this triangular duct hanging band 4, by placing the triangular duct hanging band 4 along the base of the triangular duct 1 and connecting the hanging tool H through the hanging tool insertion holes 42 at both ends 41 of the triangular duct hanging band 4, it is possible to support the base of the triangular duct 1 and provide a stable and strong arrangement. Even if the base does not extend approximately horizontally, it is possible to support the wall panel 2, which is the base of the triangular duct 1, and provide a stable and strong arrangement.

(Embodiment 3)
7A and 7B are a front view and a plan view of the triangular duct hanging band 5 according to this embodiment. The triangular duct hanging band 5 is a band for supporting the apex of the approximately triangular cross section of the triangular duct 1 of the first embodiment and suspending it with a suspender H. In this embodiment, a case will be described in which the triangular duct 1 is suspended so that the cross section of the triangular duct 1 is approximately an inverted triangle.

The triangular duct suspension band 5 is made of a strip-shaped steel plate, and has a V-shaped portion 51 that is approximately V-shaped and to which the bottom apex (apex of the triangle) of the approximately inverted triangle of the cross section of the triangular duct 1 is attached, and horizontal portions 52 that extend outward (approximately horizontally outward) from both ends of the V-shaped portion 51. The size of the V-shaped portion 51 is approximately equal to the two hypotenuses of the approximately inverted triangle of the cross section of the triangular duct 1, and the V-shaped portion 51 and the horizontal portion 52 are formed so that the upper side of the approximately inverted triangle of the cross section of the triangular duct 1 and the horizontal portion 52 are approximately flush with each other. In other words, the cross section of the triangular duct 1 is almost entirely contained within the V-shaped portion 51, and the horizontal portions 52 are formed so that they protrude from both sides of the upper side of the approximately inverted triangle of the triangular duct 1.

In addition, both horizontal parts 52 are formed with a suspender insertion hole (connection part) 53 for connecting the suspender H. That is, as in the second embodiment, the suspender H is composed of a long rod screw, and the upper end is disposed and fixed to the ceiling or the like. The suspender insertion hole 53 is a hole into which the suspender H can be inserted, and the lower end of the suspender H is inserted into both suspender insertion holes 53, and a nut or the like is attached to the lower end of the suspender H, thereby disposing the triangular duct suspension band 5 in a V-shape. The top (whole cross section) of the triangular duct 1 is accommodated in the V-shaped part 51 of the triangular duct suspension band 5, so that the top of the triangular duct 1 is supported and suspended. Note that multiple triangular duct suspension bands 5 are disposed according to the length, weight, etc. of the triangular duct 1.

In this way, with this triangular duct suspension band 5, the V-shaped portion 51 of the triangular duct suspension band 5 is attached to the top of the cross section of the triangular duct 1, and the suspension tool H is connected through the suspension tool insertion hole 53 of the horizontal portion 52 of the triangular duct suspension band 5, making it possible to support the top of the triangular duct 1 and provide a stable and strong arrangement. Furthermore, since the top of the triangular duct 1 is supported, it is possible to prevent the triangular duct 1 from moving in the width direction (direction approximately perpendicular to the axial direction D). Furthermore, even if the cross section of the triangular duct 1 does not form an approximately inverted triangle, it is possible to support the top of the triangular duct 1 and provide a stable and strong arrangement.

(Embodiment 4)
8A is a schematic plan view of the triangular duct 10 according to this embodiment, and FIG. 8B is a view from the A-A direction of the triangular duct 10. This embodiment differs from the first embodiment in that three wall panels 61, 62, and 63 are formed so that the axial direction D is curved in an arc shape. The same reference numerals are used to designate the same components as those in the first embodiment, and the description thereof will be omitted.

The triangular duct 10 has an axial direction D that bends in an arc shape, and in this embodiment, the three wall panels 61, 62, and 63 are formed so that the direction of gas flow changes by approximately 90 degrees. For this reason, the three wall panels 61, 62, and 63 each have a different shape.

That is, as shown in FIG. 8, when the triangular duct 10 is arranged so that the cross section is a substantially inverted triangle, the first wall plate 61 located on the upper surface is substantially fan-shaped, consisting of a large concentric arc and a small concentric arc. The second wall plate 62, which is the inclined surface on the inner arc side of the first wall plate 61, is substantially trapezoidal in shape with a short upper edge (the edge on the first wall plate 61 side) and a longer lower edge than the upper edge. The third wall plate 63, which is the inclined surface on the outer arc side of the first wall plate 61, is substantially trapezoidal in shape with a long upper edge (the edge on the first wall plate 61 side) and a shorter lower edge than the upper edge.

As with embodiment 1, a single seam (first seam) 21 is formed on one side edge of each of these wall panels 61, 62, 63, and a double seam (second seam) 22 is formed on the other side edge. The three wall panels 61, 62, 63 are arranged so that the single seams 21 and double seams 22 are adjacent to each other, and the three wall panels 61, 62, 63 are joined and assembled by fitting the adjacent single seams 21 and double seams 22 together.

As described above, according to this embodiment, the axial direction D of the triangular duct 10 is curved in an arc shape, so the direction of gas flow can be changed, making it possible to apply the triangular duct 10 to a variety of uses and needs. Also, as in the first embodiment, the triangular duct 10 is formed by seam-jointing three wall panels 61, 62, and 63, so a strong rectangular duct can be manufactured using only the three wall panels 61, 62, and 63, making it possible to reduce material and manufacturing costs.

Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there are design changes within the scope of the present invention, they are included in the present invention. For example, in the above embodiment, the first and second seams are single seam 21 and double seam 22 as described above, but seams of other structures and shapes may also be used. For example, they may have a button punch seam structure.

In addition, in the second and third embodiments, one hanging tool insertion hole 42, 53 is provided on each end of the triangular duct hanging bands 4, 5, but multiple hanging tool insertion holes 42, 53 may be provided depending on the shape, size, weight, etc. of the triangular duct 1, 10, and the triangular duct hanging bands 4, 5 may be suspended by three or more hanging tools H. Furthermore, in the fourth embodiment, a triangular duct 10 in which the axial direction (axis) D is bent at approximately 90 degrees is described, but it is of course applicable to cases in which the axial direction D is bent at other angles.

1 Triangular duct 2 Wall panel 21 Single seam (first seam)
22 Double Goby (Second Goby)
23 Flange portion 3 Corner piece for triangular duct 31 Center portion 33 Bolt insertion hole 32 Mounting portion 4 Suspension band for triangular duct 41 Both ends 42 Suspension tool insertion hole (connection portion)
5 Hanging band for triangular duct 51 V-shaped portion 52 Horizontal portion 53 Hanging tool insertion hole (connection portion)
H Hanging tool D Axial direction

Claims (7)

Three wall panels are arranged so as to form a tubular shape having a substantially triangular cross section, a first seam is formed on a side edge of one adjacent wall panel, and a second seam is formed on a side edge of the other adjacent wall panel,
The three wall panels are joined by fitting the first seam and the second seam together.
A triangular duct characterized by: The direction of gas flow is the axial direction,
A flange portion is formed at each end of the three wall panels in the axial direction, the flange portion being configured to rise substantially perpendicular to the axial direction and to be connected to an external member.
2. The triangular duct according to claim 1 . The three wall panels are arranged so that the cross section is a substantially equilateral triangle.
2. The triangular duct according to claim 1 . The direction of gas flow is the axial direction,
The three wall panels are formed so that the axial direction is curved in an arc.
2. The triangular duct according to claim 1 . A triangular duct suspension band for suspending the triangular duct according to any one of claims 1 to 4 by supporting the base of the approximately triangular cross section with a rod-shaped suspension tool,
The straight belt-like member is disposed along the bottom side, both ends of the belt protruding from both ends of the bottom side, and both ends are provided with connection parts for connecting the hanging tool.
A suspension band for triangular ducts. A triangular duct suspension band for suspending the triangular duct according to any one of claims 1 to 4 by supporting the apex of the approximately triangular cross section with a rod-shaped suspension tool,
A V-shaped portion having a generally V-shape to which the top portion is attached;
A horizontal portion extending laterally outward from both ends of the V-shaped portion and provided with a connection portion for connecting the suspender;
A suspension band for a triangular duct, comprising: A corner piece for a triangular duct for connecting adjacent flange portions of the triangular duct according to claim 2,
a flat plate-like member formed in a substantially V-shape with an angle equal to the apex angle of the triangular duct, and a hole for inserting a bolt is formed in a central portion exposed between the adjacent flange portions when the triangular duct is disposed on the back surface of the adjacent flange portions;
A corner piece for a triangular duct.