Duct system

Abstract

To keep appearance good and improve designability while simplifying a configuration, upon suspending and supporting a duct.SOLUTION: A duct system comprises: a duct 2 composed of cardboard; and a multi-functional member 3 that is disposed inside the duct 2, and functions as a reinforcing member for reinforcing the duct 2 and also as a suspending source member for suspending and supporting the duct 2. A hanging source function portion 31 that functions as the suspending source member in the multi-functional member 3 is housed within the breadth of the duct 2, and is connected to a suspending tool 4 at a position invisible from the lower side of the duct 2.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a duct system including a duct made of cardboard.

Background Art

[0002] Conventionally, as a duct for air conditioning, a duct system is known in which a duct made of cardboard is adopted and the duct is suspended and supported using a suspension tool from a ceiling or the like (see, for example, Patent Documents 1 and 2).

[0003] In the duct system described in Patent Document 1, a suspension member that functions as a suspension point for suspending and supporting the duct is provided inside the duct, and a suspension tool is connected to the suspension member to suspend and support the duct. Since the suspension member is made of metal, it also functions as a reinforcing member for reinforcing the duct.

[0004] In the duct system described in Patent Document 2, a suspension member that functions as a suspension point for suspending and supporting the duct is provided outside the duct, and a suspension tool is connected to the suspension member to suspend and support the duct.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the above duct system, when suspending and supporting the duct, if the entire suspension member is exposed outside the duct, the shape of the suspension member is directly visible, resulting in poor appearance and impaired design.

[0007] In this regard, in the duct system described in Patent Document 1, since the suspension member is provided inside the duct, the entire suspension member is not exposed outside the duct. However, the suspension member is provided with a flange portion that protrudes outside the duct, and the flange portion protrudes outside the duct over the entire circumference of the duct on the upper side, lower side, right side, and left side of the duct. Therefore, since the flange portion protruding outside is easily visible, it looks bad and causes a decrease in design quality.

[0008] Also, in the duct system described in Patent Document 2, the suspension member is provided on the outer upper surface portion of the duct, and the suspension member cannot be visually recognized from the lower side of the duct. However, since the suspension member is provided outside the duct, in order to prevent the duct from falling, etc., a configuration for firmly fixing the suspension member and the duct must be provided, which leads to a complication of the configuration.

[0009] In view of this situation, the main problem of the present invention is to provide a duct system that can improve the appearance and design quality while simplifying the configuration when suspending and supporting the duct.

Means for Solving the Problems

[0010] The present invention Akira is includes a duct made of cardboard, and a combined member disposed inside the duct, functioning as a reinforcing member for reinforcing the duct and also functioning as a suspension member for suspending and supporting the duct, The suspension function part that functions as a suspension member in the combined member is disposed in a state of protruding only above the outside of the duct, formed with a width smaller than the width of the duct and housed within the width of the duct, and is connected to a suspension tool at a position where it cannot be visually recognized from the lower side of the duct. suitable.

[0011] According to this configuration, the dual-purpose member functions not only as a reinforcing member but also as a suspension member, so that the configuration can be simplified. Moreover, since the dual-purpose member is disposed inside the duct, the suspension function part of the dual-purpose member is housed within the lateral width of the duct and is connected to the suspension tool at a position where it cannot be visually recognized from the lower side of the duct. Therefore, not only the part that functions as a reinforcing member but also the suspension function part of the dual-purpose member cannot be visually recognized from the lower side of the duct. Thus, a complicated configuration for firmly fixing the suspension member and the duct is not required, and while simplifying the configuration, it looks good and the design can be improved.

[0012] This invention Akira is wherein the dual-purpose member is disposed at the connection part between the ducts and has a function as a connection member for connecting the ducts to each other, The connection function part that functions as a connection member in the dual-purpose member is provided with a duct insertion part that can be inserted into the duct and whose insertion amount can be adjusted. suitable. .

[0013] According to this configuration, since the dual-purpose member also functions as a connection member, the configuration can be further simplified. Moreover, by adjusting the insertion amount of the duct insertion part into the duct, the position of the dual-purpose member in the longitudinal direction of the duct can be adjusted, so that the position of the suspension function part of the dual-purpose member can be adjusted and the suspension position of the duct can be adjusted.

[0014] The first 1 characteristic configuration of the present invention is a duct constituted by cardboard and, a dual-purpose member disposed inside the duct, functioning as a reinforcing member for reinforcing the duct and also functioning as a suspension member for suspending and supporting the duct, wherein the suspension function part that functions as a suspension member in the dual-purpose member is disposed in a state of protruding upward outside the duct, is configured to have a lateral width smaller than the lateral width of the duct and is housed within the lateral width of the duct, and is connected to the suspension tool at a position where it cannot be visually recognized from the lower side of the duct. An air circulation part is provided which communicates between the inside and the outside of the duct to allow air to flow freely. The dual-purpose member is provided with a support part for supporting the air circulation part. The air circulation part is attached to the support part and is provided in a state of being supported by the dual-purpose member. The air circulation part is provided in a state of being continuously connected in series in the longitudinal direction of the duct.

[0015] According to this configuration, the dual-purpose member not only functions as a reinforcing member but also functions as a suspension member, so that the configuration can be simplified. Moreover, the dual-purpose member is disposed inside the duct, the suspension function part of the dual-purpose member is housed within the width of the duct, and is connected to the suspension tool at a position where it cannot be visually recognized from the lower side of the duct. Therefore, in the dual-purpose member, not only the part that functions as a reinforcing member but also the suspension function part cannot be visually recognized from the lower side of the duct. Thus, a complicated configuration for firmly fixing the suspension member and the duct is not required, and while simplifying the configuration, it looks good and the design can be improved. Furthermore, According to this configuration, since the air circulation part is provided in a state of being continuously connected in series in the longitudinal direction of the duct, air can be circulated continuously between the inside and the outside of the duct in the longitudinal direction of the duct. Therefore, for example, when used as a duct for air conditioning, conditioned air can be supplied continuously from the duct to the air-conditioned space in the longitudinal direction of the duct, or conversely, return air from the air-conditioned space can be supplied into the duct continuously in the longitudinal direction of the duct, and the air conditioning of the air-conditioned space can be performed efficiently. And since such an air circulation part can be provided in a state of being supported by the dual-purpose member, there is no need to separately provide a member for supporting the air circulation part, and the configuration can be effectively simplified.

[0016] The 2 characteristic configuration of the present invention is that the cross-sectional shape of the dual-purpose member is formed in a U-shape with the lower side open or a lip groove shape with the lower side open.

[0017] According to this configuration, while the dual-purpose member has a simple shape such as a U-shape or a lip groove shape, the open space on the lower side can be used as an installation space for the air circulation part, and the air circulation part can be efficiently arranged.

[0018] The 3 characteristic configuration of the present invention is a duct made of cardboard, and A combined member is disposed inside the duct, which functions as a reinforcing member for reinforcing the duct and also functions as a suspension member for suspending and supporting the duct. The suspension function part of the combined member that functions as a suspension member is housed within the width of the duct and is connected to a suspension tool at a position where it cannot be visually recognized from the lower side of the duct. A plurality of the ducts are arranged at intervals in the vertical direction. The duct arranged on the lower side is suspended and supported by using the combined member provided in the duct arranged on the upper side.

[0019] According to this configuration, the dual-purpose member not only functions as a reinforcing member but also functions as a suspension member, so that the configuration can be simplified. Moreover, the dual-purpose member is disposed inside the duct, the suspension function part of the dual-purpose member is housed within the width of the duct, and is connected to the suspension tool at a position where it cannot be visually recognized from the lower side of the duct. Therefore, in the dual-purpose member, not only the part that functions as a reinforcing member but also the suspension function part cannot be visually recognized from the lower side of the duct. Thus, a complicated configuration for firmly fixing the suspension member and the duct is not required, and while simplifying the configuration, it looks good and the design can be improved. Furthermore, According to this configuration, when arranging a plurality of ducts at intervals in the vertical direction, the duct arranged on the lower side can be suspended and supported by using the combined member provided in the duct arranged on the upper side. Therefore, there is no need to separately provide a member for suspending and supporting the duct arranged on the lower side, and the configuration can be effectively simplified.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying out the Invention

[0021] An embodiment of the duct system according to the present invention will be described with reference to the drawings. 〔First Embodiment〕 As shown in FIG. 3, this duct system 1 includes a plurality of ducts 2 made of cardboard connected in the longitudinal direction thereof, and the plurality of ducts 2 are suspended and supported by a first suspension tool 4 (corresponding to a suspension tool) extending downward from a ceiling portion or the like.

[0022] The duct 2 is formed, for example, by bending cardboard and fixing its ends to each other with a fixture such as aluminum tape, so that, as shown in FIG. 2, its internal space becomes an air flow path 21 through which air flows, in a cylindrical shape. In FIG. 2, the cross-sectional shape of the duct 2 is rectangular, but it is not limited to a rectangular shape, and various shapes such as a circular shape and a polygonal shape can be applied.

[0023] Regarding the length of the duct 2, the lengths of all the ducts 2 can be the same, but the length of the duct 2 can be appropriately changed according to the situation of the installation location of the duct system 1 or the like. For example, when installing a plurality of ducts 2, the length of the last duct 2 to be installed can be adjusted to a length corresponding to the installation location.

[0024] The duct system 1 is provided with a suspension member for suspending and supporting the duct 2. As shown in FIGS. 1 and 2, this suspension member is provided as a first dual-purpose member 3 (corresponding to a dual-purpose member) that not only functions as a suspension member but also functions as a reinforcing member for reinforcing the duct 2. The first dual-purpose member 3 is made of, for example, metal such as iron, but various materials can be applied, such as a material having higher rigidity than the duct 2 made of cardboard.

[0025] As shown in FIGS. 1 and 2, the first dual-purpose member 3 has a predetermined length in the longitudinal direction of the duct 2 and is disposed inside the duct 2. A suspension function portion 31 that functions as a suspension member is disposed in a state of protruding outside the duct 2. The first dual-purpose member 3 is fixedly attached to the duct 2 by a fixture B such as a screw provided in a state of penetrating the duct 2. The suspension function portion 31 in the first dual-purpose member 3 is disposed at the central portion of the first dual-purpose member 3 in the longitudinal direction of the duct 2 and is formed of a plate-like body extending in the vertical direction, as shown in FIG. 1.

[0026] As shown in FIG. 2, inside the duct 2, the first dual-purpose member 3 has an upper wall portion 32 extending in the left-right direction of the duct 2, side wall portions 33 extending downward from both ends of the upper wall portion 32, and lip wall portions 34 extending inward in the left-right direction of the duct 2 from the lower end portions of the respective side wall portions 33 on both sides, and is formed in a cross-sectional shape of a lip groove shape (C shape) with the lower side open. Each of the upper wall portion 32, the side wall portions 33, and the lip wall portions 34 is formed of a plate-like body having a predetermined length in the longitudinal direction of the duct 2, as shown in FIG. 1.

[0027] In the first dual-purpose member 3, as shown in FIG. 2, the upper wall portion 32 is provided in a state of abutting against the entire inner surface of the upper wall portion of the duct 2, the side wall portions 33 on both sides are provided in a state of abutting against the entire inner surface of the side wall portions on both sides of the duct 2, and the lip wall portion 34 is provided in a state of abutting against a part of the inner surface of the lower wall portion of the duct 2. In this way, each of the upper wall portion 32, the side wall portions 33, and the lip wall portion 34 functions as a reinforcing member for reinforcing the duct 2 by continuously abutting against the inner surface of the duct 2 in the circumferential direction.

[0028] As shown in FIG. 2, the suspension function portion 31 in the first dual-purpose member 3 is formed in a plate shape extending in the vertical direction in a state of penetrating the upper wall portion 32 in the vertical direction, and the portion extending above the upper wall portion 32 is provided in a state of protruding above the duct 2. The suspension function portion 31 is configured to have a width that is smaller by a predetermined amount than the width of the duct 2 in the left-right direction of the duct 2, and is disposed at the center in the left-right direction of the duct 2. As a result, the suspension function portion 31 is housed within the width of the duct 2 and is disposed at a position where it cannot be visually recognized from the lower side of the duct 2.

[0029] As shown in FIG. 2, the suspension function portion 31 is provided with a pair of left and right upper connection portions 35. Each of the pair of left and right upper connection portions 35 is formed in a circular hole shape and is connected to the first suspension tool 4 (for example, a suspension bolt) via a connector S (see FIG. 3) such as a bolt or a nut. Since the upper end portions of each of the pair of left and right first suspension tools 4 are connected to the ceiling portion or the like, by connecting the lower end portion of the first suspension tool 4 to the upper connection portion 35 in the suspension function portion 31 via the connector S, the duct 2 is suspended and supported. The upper connection portion 35 is provided at a position housed within the width of the duct 2 and close to the upper surface portion of the duct 2. Therefore, when viewed from the lower side of the duct 2, the upper connection portion 35 is hidden by the duct 2, and the suspension function portion 31 is connected to the first suspension tool 4 at a position where it cannot be visually recognized from the lower side of the duct 2.

[0030] As shown in FIG. 3, the first dual-purpose member 3 is disposed at the connection portion 5 between the ducts 2 and also functions as a connection member for connecting the ducts 2. At the connection portion 5 between the ducts 2, a tape material T such as an aluminum tape is provided in a state of being wound around the periphery of the duct 2. As shown in FIGS. 1 and 4, the first dual-purpose member 3 is formed in a symmetric shape about the suspension function portion 31 in the longitudinal direction of the duct 2, and the portions from both ends thereof to the suspension function portion 31 are configured as duct insertion portions 36 that can be inserted into the duct 2. In FIG. 4, the left side shows a state where the duct insertion portion 36 is inserted into the duct 2, and the right side shows a state before the duct insertion portion 36 is inserted into the duct 2.

[0031] As shown in FIGS. 1, 2, and 4, the outer shape of the duct insertion portion 36 is formed to be substantially the same shape and substantially the same size as the internal space of the duct 2, and the duct 2 is provided so as to be insertable in a state of being fitted inside the duct 2. The duct insertion portion 36 has a length N (see FIGS. 1 and 4) from both ends of the first dual-purpose member 3 to the suspension function portion 31 in the longitudinal direction of the duct 2, and the insertion amount of the duct 2 can be adjusted freely within a range corresponding to the length N. When constructing in a state where the duct 2 is suspended and supported, by adjusting the insertion amount of the duct 2 in the duct insertion portion 36, the position of the suspension function portion 31 in the first dual-purpose member 3 can be adjusted, and the suspension position of the duct 2 can be adjusted.

[0032] As shown in FIG. 2, the duct 2 is provided with an air circulation portion 6 that allows air to flow freely by communicating the inside and outside of the duct 2. In this embodiment, the air circulation portion 6 is provided as an air ejection portion that ejects the air inside the duct 2 to an air-conditioned target space or the like outside the duct 2. As shown in FIG. 3, the air circulation portion 6 is provided in a continuous state extending over a plurality of ducts 2 in the longitudinal direction of the duct 2. The length of the air circulation portion 6 can be appropriately changed according to, for example, the length of the duct 2 to be installed and the size of the air-conditioned target space.

[0033] As shown in Fig. 2, the air flow portion 6 is disposed at a position corresponding to the lower wall portion of the duct 2 while being supported by the first dual-purpose member 3. As shown in Fig. 3, the air flow portion 6 is provided in a continuously connected state across a plurality of ducts 2. In the longitudinal direction of the duct 2, since there are a plurality of first dual-purpose members 3 with respect to the air flow portion 6, the air flow portion 6 is supported by each of the plurality of first dual-purpose members 3.

[0034] As shown in Fig. 2, between the lip wall portions 34 on both sides in the first dual-purpose member 3 is open, and the air flow portion 6 is disposed using the space of the open portion. In order to support the air flow portion 6, a plate-shaped mounting fitting 7 is disposed across the lip wall portions 34 on both sides. The mounting fitting 7 is fixedly attached to the lip wall portion 34 in the first dual-purpose member 3 by a fixture B such as a screw. The air flow portion 6 is fixedly attached to the mounting fitting 7 by a fixture B such as a screw. In this way, while using the first dual-purpose member 3 as a member for supporting the air flow portion 6, the air flow portion 6 is efficiently disposed in the open space of the first dual-purpose member 3.

[0035] At the suspension function portion 31 in the first dual-purpose member 3, a circular hole-shaped lower connection portion 37 is provided at a portion protruding downward from the upper wall portion 32. The upper end portion of a fall prevention member 8 such as a wire is connected to the lower connection portion 37, and the lower end portion of the fall prevention member 8 is connected to the air flow portion 6, preventing the air flow portion 6 from falling.

[0036] Fig. 2 shows the case where the ducts 2 are arranged in one row in the vertical direction. However, for example, as shown in Fig. 5, the ducts 2 can also be arranged in a state where a plurality of rows (for example, two rows) are arranged at intervals in the vertical direction. As shown in Fig. 5, when the ducts 2 are arranged in a plurality of rows at intervals in the vertical direction, the air flow direction in the ducts 2 can be made the same or different.

[0037] In what is shown in Fig. 5, the vertical width and the horizontal width of the duct 2a disposed on the upper side and the duct 2b disposed on the lower side are the same size or substantially the same size, but they can also be made different sizes.

[0038] In FIG. 5, for the duct 2a disposed on the upper side, the configuration other than the point that it does not have the air flow portion 6 is the same as that of the duct 2 shown in FIG. 2. Therefore, the description of the duct 2a disposed on the upper side is omitted, and the configuration in which the first dual-purpose member 3 is attached and fixed to the duct 2a by the fixture B is omitted and illustrated.

[0039] In FIG. 5, for the duct 2b disposed on the lower side, the configuration other than the portion to be supported by hanging is the same as that of the duct 2 shown in FIG. 2. Therefore, the portion to be supported by hanging will be described.

[0040] The duct 2b disposed on the lower side is supported by hanging using the first dual-purpose member 3a provided in the duct 2a disposed on the upper side. A second hanging tool 9 (for example, a hanging bolt) for supporting the duct 2b disposed on the lower side by hanging is provided in a state of penetrating the lower wall portion of the duct 2a disposed on the upper side and the lip wall portion 34 of the first dual-purpose member 3a in the vertical direction. The upper end portion of the second hanging tool 9 is connected to the lip wall portion 34 of the first dual-purpose member 3a provided in the duct 2a disposed on the upper side by a connector S such as a nut. The lower end portion of the second hanging tool 9 is connected to the hanging function portion 31 of the first dual-purpose member 3b provided in the duct 2b disposed on the lower side by a connector S (the same as in FIG. 3) such as a bolt or a nut. In this way, by using the first dual-purpose member 3a provided in the duct 2a disposed on the upper side to support the duct 2b disposed on the lower side by hanging, the duct 2b disposed on the lower side can be appropriately disposed at an overlapping position with respect to the duct 2a disposed on the upper side in a plan view, and the ducts 2a and 2b arranged in the vertical direction can be efficiently disposed while improving the design property.

[0041] 〔Second Embodiment〕 This second embodiment is an alternative embodiment of the suspension function part 31 of the first dual-purpose member 3 and the first suspension tool 4 (see FIGS. 1 and 2) in the first embodiment. Hereinafter, based on FIGS. 6 and 7, the suspension function part 101 of the second dual-purpose member 10 (corresponding to the dual-purpose member) and the third suspension tool 11 in the second embodiment will be mainly described. Regarding other configurations, since they are the same as those in the first embodiment, the description thereof will be omitted by indicating the same reference numerals and the like.

[0042] In the first embodiment, as shown in FIG. 2, as the first suspension tool 4, a rod-shaped body such as a suspension bolt is provided, and the suspension function part 31 of the first dual-purpose member 3 is disposed above the duct 2 in a state of protruding outside the duct 2. On the contrary, in the second embodiment, as shown in FIGS. 6 and 7, as the third suspension tool 11 (corresponding to the suspension tool), a belt-shaped body such as a winding band having a plurality of hole portions 11a spaced apart in the longitudinal direction penetrates the duct 2 and the second dual-purpose member 10 in the vertical direction, and the suspension function part 101 of the second dual-purpose member 10 is disposed inside the duct 2.

[0043] As shown in FIGS. 6 and 7, the second dual-purpose member 10 is formed in a lip groove shape with an open lower side having an upper wall portion 102, side wall portions 103, and a lip wall portion 104, similar to the first embodiment. The upper wall portion 102 is provided with a through portion 105 penetrating in the vertical direction, and the third suspension tool 11 is provided in a state of penetrating the upper wall portion 102 of the second dual-purpose member 10 in the vertical direction through the through portion 105.

[0044] As shown in FIG. 6, the second dual-purpose member 10 is formed in a symmetric shape centered on the through portion 105 in the longitudinal direction of the duct 2, similar to the first embodiment, and the portions from both ends thereof to the through portion 105 are configured as duct insertion portions 106.

[0045] As shown in Fig. 7, a connector S is attached to a lower side portion that protrudes below the upper wall portion 102 of the second dual-purpose member 10 in the third suspension tool 11. The connector S includes a bolt S1 (e.g., a split bolt) that passes through a hole 11a of the third suspension tool 11 and a nut S2 that can be screwed onto the bolt S1, and is provided in a state where the third suspension tool 11 is sandwiched between the nuts S2 on both sides via washers S3. When the connector S attached to the third suspension tool 11 abuts against the inner wall portion of the upper wall portion 102, the third suspension tool 11 is prevented from coming out upward from the through-hole 105 of the upper wall portion 102. Thereby, in the second dual-purpose member 10, a suspension function portion 101 that functions as a suspension member is composed of the through-hole 105, the inner wall portion of the upper wall portion 102, etc., and is disposed inside the duct 2.

[0046] In the second embodiment, similar to the first embodiment, the air circulation portion 6 is disposed at a position corresponding to the lower wall portion of the duct 2 while being supported by the second dual-purpose member 10. The fall prevention material 8 for preventing the air circulation portion 6 from falling has its lower end connected to the air circulation portion 6 and its upper end connected to the third suspension tool 11 in a state of passing through the hole 11a of the third suspension tool 11.

[0047] Also in this second embodiment, similar to the first embodiment, as shown in Fig. 8, the ducts 2 can be arranged in a state of being arranged in multiple rows (e.g., two rows) at intervals in the vertical direction. In Fig. 8, regarding the duct 2a disposed on the upper side, since the configuration other than the point of not having the air circulation portion 6 is the same as the duct 2 shown in Fig. 7, the description of the duct 2a disposed on the upper side is omitted, and the configuration in which the second dual-purpose member 10 is attached and fixed to the duct 2a with the fixture B is omitted and shown.

[0048] In Fig. 8, regarding the duct 2b disposed on the lower side, since the configuration other than the supported portion to be suspended and supported is the same as the duct 2 shown in Fig. 7, the supported portion to be suspended and supported will be described.

[0049] The duct 2b disposed on the lower side is suspended and supported by using the second dual-purpose member 10a provided in the duct 2a disposed on the upper side. A third suspension tool 11 for suspending and supporting the duct 2b disposed on the lower side is provided in a state of penetrating the lower wall portion of the duct 2a disposed on the upper side and the lip wall portion 34 of the second dual-purpose member 10a in the vertical direction. The upper end portion of the third suspension tool 11 is connected by a connector S to the lip wall portion 104 of the second dual-purpose member 10a provided in the duct 2a disposed on the upper side. The lower end portion of the third suspension tool 11 is connected by a connector S to the upper wall portion 102 of the second dual-purpose member 10b provided in the duct 2b disposed on the lower side. In this way, by suspending and supporting the duct 2b disposed on the lower side by using the first dual-purpose member 3a provided in the duct 2a disposed on the upper side, the duct 2b disposed on the lower side can be appropriately disposed at an overlapping position with respect to the duct 2a disposed on the upper side in a plan view, and the ducts 2a and 2b arranged in the vertical direction can be efficiently and artistically disposed.

[0050] 〔Third Embodiment〕 This third embodiment is another embodiment of the first dual-purpose member 3 (see FIG. 2) of the first embodiment. Hereinafter, based on FIG. 9, the third dual-purpose member 12 (corresponding to the dual-purpose member) in the third embodiment will be mainly described. Since the other configurations are the same as those of the first embodiment, the description thereof will be omitted by indicating the same reference numerals and the like.

[0051] In the first embodiment, as shown in FIG. 2, the first dual-purpose member 3 is formed in a lip groove shape with an open lower side having an upper wall portion 32, a side wall portion 33, and a lip wall portion 34. On the other hand, in the third embodiment, as shown in FIG. 9, the third dual-purpose member 12 is formed in a U-shaped cross-sectional shape with an open lower side having an upper wall portion 122 and a side wall portion 123. The upper wall portion 122 of the third dual-purpose member 12 has a length extending over the entire length of the inner surface of the upper wall portion of the duct 2 in the left-right direction. The side wall portion 123 of the third dual-purpose member 12 has a length that is shorter than the entire length of the inner surface of the side wall portion of the duct 2 by a predetermined length in the up-down direction, and exists only up to the middle of the inner surface of the side wall portion of the duct 2.

[0052] In the first embodiment, as shown in FIG. 3, the first dual-purpose member 3 is disposed at the connection portion 5 between the ducts 2 and also functions as a connecting member for connecting the ducts 2 to each other. On the other hand, in the third embodiment, regarding the arrangement position of the third dual-purpose member 12 in the longitudinal direction of the duct 2, it can be set corresponding to a hanging position according to various conditions such as the installation situation, independently of the connection portion 5 between the ducts 2. Thus, the third dual-purpose member 12 can be provided without functioning as a connecting member for connecting the ducts 2 to each other.

[0053] In the third embodiment, as shown in FIG. 9, the duct 2 is also configured by combining two corrugated papers 22 and 23, different from the first embodiment. The duct 2 has a U-shaped corrugated paper 22 with an open upper side and a plate-shaped corrugated paper 23, and the plate-shaped corrugated paper 23 is disposed in a state of closing the open portion of the U-shaped corrugated paper 22 to form a rectangular air flow passage 21 inside.

[0054] The fourth suspension tool 13 (for example, a suspension bolt) penetrates the upper wall portion of the duct 2 in the vertical direction and penetrates the upper wall portion 122 of the third dual-purpose member 12 through the penetration portion 124 in the vertical direction. In the fourth suspension tool 13 (corresponding to the suspension tool), a connecting tool S such as a nut is attached to the lower side portion protruding downward from the upper wall portion 122 of the third dual-purpose member 12. By the connecting tool S attached to the fourth suspension tool 13 abutting against the inner wall portion of the upper wall portion 122, the fourth suspension tool 13 is prevented from coming out upward from the penetration portion 124 of the upper wall portion 122. As a result, in the third dual-purpose member 12, the suspension function portion 121 that functions as a suspension member is composed of the penetration portion 124, the inner wall portion of the upper wall portion 122, etc., and is disposed inside the duct 2.

[0055] In the third embodiment, similar to the first embodiment, the air circulation portion 6 is disposed at a position corresponding to the lower wall portion of the duct 2. However, different from the first embodiment, there is no lip wall portion in the dual-purpose member on the inner surface portion of the lower wall portion of the duct 2, and the air circulation portion 6 cannot be supported by the lip wall portion. Therefore, in the third embodiment, a pair of left and right plate-shaped attachment portions 14 (for example, iron plates) are provided on the inner surface portion of the lower wall portion of the duct 2, and the air circulation portion 6 is supported using the attachment portions 14. The attachment portion 14 is attached and fixed to the inner surface portion of the lower wall portion of the duct 2 by, for example, an adhesive or the like. A mounting bracket 7 is disposed in a state spanning the attachment portions 14 on both sides, and although not shown in the figure, the mounting bracket 7 is attached and fixed to the attachment portion 14 by screws or the like. The air circulation portion 6 is attached and fixed to the mounting bracket 7 by a mounting tool B such as a screw.

[0056] Further, a belt-shaped support tool 15 such as a winding band is connected to the air circulation portion 6, and the air circulation portion 6 is supported by hanging with the support tool 15. The upper end portion of the support tool 15 is connected to the fourth suspension tool 13, and the lower end portion of the support tool 15 is connected to the air circulation portion 6. Regarding the upper end portion of the support tool 15, it is not limited to the fourth suspension tool 13, and can also be connected to, for example, the upper wall portion 122 of the third dual-purpose member 12.

[0057] In the third embodiment, similarly to the first embodiment, a fall prevention member 8 for preventing the air flow portion 6 from falling is provided. The upper end portion of the fall prevention member 8 is connected to the fourth suspension tool 13, and the lower end portion of the fall prevention member 8 is connected to the air flow portion 6.

[0058] Also in this third embodiment, similarly to the first embodiment, as shown in FIG. 10, the ducts 2 can be arranged in a state where a plurality of rows (for example, two rows) are arranged at intervals in the vertical direction. In FIG. 10, the duct 2a arranged on the upper side is composed of a combination of two L-shaped corrugated papers 24 and 25, different from the duct 2 shown in FIG. 9. The duct 2a arranged on the upper side is formed by connecting the two corrugated papers 24 and 25 with a tape material T such as an aluminum tape, and a rectangular air flow path 21 having a cross-sectional area larger than that of the duct 2 shown in FIG. 9 is provided in its internal space.

[0059] As shown in FIG. 10, the duct 2a arranged on the upper side is provided with a fourth dual-purpose member 16 (corresponding to the dual-purpose member) inside, different from the duct 2 shown in FIG. 9. The fourth dual-purpose member 16 is formed in a rectangular (square shape) cross-sectional shape having an upper wall portion 162, a side wall portion 163, and a lower wall portion 164. As a result, the fourth dual-purpose member 16 exists over the entire circumference of the inner surface portion of the duct 2a arranged on the upper side, and the duct 2a can be effectively reinforced.

[0060] As shown in FIG. 10, the fourth suspension tool 13 (e.g., a suspension bolt) penetrates the upper wall portion of the duct 2a disposed on the upper side in the vertical direction, and penetrates the upper wall portion 162 of the fourth dual-purpose member 16 through the penetration portion 165 in the vertical direction. A connecting tool S such as a nut is attached to a lower side portion of the fourth suspension tool 13 that protrudes below the upper wall portion 162 of the fourth dual-purpose member 16. By the connecting tool S attached to the fourth suspension tool 13 abutting against the inner wall portion of the upper wall portion 162, the fourth suspension tool 13 is prevented from coming out upward from the penetration portion 165 of the upper wall portion 162. Thereby, in the fourth dual-purpose member 16, the suspension function portion 161 that functions as a suspension member is composed of the penetration portion 165, the inner wall portion of the upper wall portion 162, etc., and is disposed inside the duct 2.

[0061] In FIG. 10, regarding the duct 2b disposed on the lower side, since the configuration other than the support target portion to be suspended and supported is the same as that of the duct 2 shown in FIG. 9, the support target portion to be suspended and supported will be described.

[0062] The duct 2b disposed on the lower side is suspended and supported by using the fourth dual-purpose member 16 provided in the duct 2a disposed on the upper side. A fourth suspension tool 13 (e.g., a suspension bolt) for suspending and supporting the duct 2b disposed on the lower side penetrates the lower wall portion of the duct 2a disposed on the upper side, the lower wall portion 164 of the fourth dual-purpose member 16, the upper wall portion of the duct 2b disposed on the lower side, and the upper wall portion 122 of the third dual-purpose member 12 in the vertical direction. The upper end portion of the fourth suspension tool 13 is connected to the lower wall portion 164 of the fourth dual-purpose member 16 provided in the duct 2a disposed on the upper side by a connecting tool S such as a nut. The lower end portion of the fourth suspension tool 13 is connected to the third dual-purpose member 12 provided in the duct 2b disposed on the lower side. The fourth suspension tool 13 for suspending and supporting the duct 2b disposed on the lower side is also provided with connecting tools S on the outer surface portion of the lower wall portion of the duct 2a disposed on the upper side and the outer surface portion of the upper wall portion of the duct 2b disposed on the lower side.

[0063] In this way, by using the fourth dual-purpose member 16 provided in the duct 2a disposed on the upper side to suspend and support the duct 2b disposed on the lower side, the duct 2b disposed on the lower side can be appropriately disposed at an overlapping position with respect to the duct 2a disposed on the upper side in a plan view, and the ducts 2a and 2b arranged in the vertical direction can be efficiently and artistically disposed.

[0064] 〔Another Embodiment〕 Another embodiment of the present invention will be described. Note that the configurations of the embodiments described below are not limited to being applied individually, and can also be applied in combination with the configurations of other embodiments.

[0065] (1) In the above embodiment, the air circulation portion 6 is provided as an air ejection portion that ejects the air in the duct 2 to the air-conditioning target space outside the duct 2 or the like. Conversely, the air circulation portion 6 can also be provided as an air suction portion that supplies the air in the air-conditioning target space outside the duct 2 into the duct 2.

[0066] (2) In the above first and second embodiments, the first dual-purpose member 3 and the second dual-purpose member 10 are disposed at the connection portion 5 between the ducts 2 and function as connection members for connecting the ducts 2 to each other. However, regarding the installation positions of the first dual-purpose member 3 and the second dual-purpose member 10, regardless of the connection portion 5 between the ducts 2, for example, it can be set corresponding to the suspension positions according to various conditions such as the installation situation. Thereby, the first dual-purpose member 3 and the second dual-purpose member 10 can also be provided in a state where they do not function as connection members for connecting the ducts 2 to each other.

[0067] (3) In the above third embodiment, when the ducts 2 are arranged in a single row in the vertical direction, the duct 2 shown in FIG. 9 is exemplified. Instead of this, in FIG. 10, the ducts 2 can also be arranged in a single row in the vertical direction in a state where the duct 2a disposed on the upper side is installed.

[0068] (4) In the above-described first embodiment, as shown in FIGS. 1 and 2, the suspension function portion 31 in the first dual-purpose member 3 is provided in a posture extending in the left-right direction (width direction) of the duct 2. However, as shown in FIG. 11, the suspension function portion 31 in the first dual-purpose member 3 can also be provided in a posture extending in the longitudinal direction of the duct 2. The portion protruding into the duct 2 in the suspension function portion 31 is in a state along the air flow direction of the air flowing through the air flow path 21 in the duct 2, and the air flow resistance can be reduced. Incidentally, in this case, in the duct insertion portion 36 for connecting the ducts 2 to each other, the suspension function portion 31 exists in a state extending in the longitudinal direction of the duct 2. Therefore, a notch-shaped groove portion extending in the longitudinal direction of the duct 2 is formed at the end of the duct 2, and the suspension function portion 31 is inserted into the groove portion, so that the duct insertion portion 36 can be inserted into the duct 2. Further, the duct insertion portion 36 can be omitted from the first dual-purpose member 3, and the first dual-purpose member 3 can be provided in a state where it does not function as a connecting member for connecting the ducts 2 to each other.

[0069] (5) In the above-described first embodiment, as shown in FIGS. 1 and 2, the suspension function portion 31 in the first dual-purpose member 3 continuously extends in the left-right direction (width direction) of the duct 2, and upper-side connection portions 35 are formed on both the left and right sides thereof, and a first suspension tool 4 is connected to each of the left and right upper-side connection portions 35. Instead of this, as shown in FIG. 12, the suspension function portion 31 in the first dual-purpose member 3 is divided into a first suspension function portion 31a and a second suspension function portion 31b in the left-right direction of the duct 2, and one upper-side connection portion 35 can be formed for each of the first suspension function portion 31a and the second suspension function portion 31b. The first suspension tool 4 is connected to each of the upper-side connection portions 35 in the first suspension function portion 31a and the second suspension function portion 31b, and the duct 2 can be suspended and supported.

[0070] Also, in Fig. 12, by omitting the second suspension point functional part 31b and disposing the first suspension point functional part 31a at the center in the left - right direction (width direction) of the duct 2 and providing only one divided first suspension point functional part 31a, the length of the first dual - purpose member 3 (suspension point functional part 31) can be shortened, and the number of suspension points of the duct 2 can be made one point.

[0071] Incidentally, although not shown in the drawings, as shown in Fig. 11 in the above (4), even when the suspension point functional part 31 is disposed in a posture extending in the longitudinal direction of the duct 2, similar to Fig. 12, the suspension point functional part 31 can be divided in the longitudinal direction of the duct 2, and the first suspension tools 4 can be connected to the respective divided suspension point functional parts 31. Even in this case, by disposing the divided suspension point functional part 31 at the center in the longitudinal direction of the duct 2 and providing only one divided suspension point functional part 31, the length of the first dual - purpose member 3 (suspension point functional part 31) can be shortened, and the number of suspension points of the duct 2 can be made one point.

[0072] (6) In the above - mentioned first embodiment, as shown in Figs. 1 and 2, the suspension point functional part 31 of the first dual - purpose member 3 is provided with two upper - side connection parts 35, and two first suspension tools 4 for connecting to the upper - side connection parts 35 are also provided, and the number of suspension points of the duct 2 is two. However, the number of suspension points can be appropriately changed. For example, according to the size of the duct 2, etc., the length of the first dual - purpose member 3, the number of upper - side connection parts 35 and the number of first suspension tools 4 can be changed to change the number of suspension points of the duct 2.

Explanation of Reference Numerals

[0073] 1 Duct system 2 Duct 3 First dual - purpose member (dual - purpose member) 4 First suspension tool (suspension tool) 5 Connection part 6 Air circulation part 9 Second suspension tool (suspension tool) 10 Second dual - purpose member (dual - purpose member) 11 Third suspension tool (suspension tool) 12 Third dual - purpose member (dual - purpose member) 13 Fourth suspension tool (suspension tool) 16 Fourth dual-purpose member (dual-purpose member) 31 Hanging point functional part 36 Duct insertion part 101 Hanging point functional part 106 Duct insertion part 121 Hanging point functional part 161 Hanging point functional part

Claims

1. A duct made of cardboard, and a combined member disposed inside the duct, functioning as a reinforcing member for reinforcing the duct and also functioning as a suspension member for suspending and supporting the duct, are provided. The suspension function part of the combined member functioning as a suspension member is disposed in a state of protruding above the outside of the duct, is configured to have a width smaller than the width of the duct, is housed within the width of the duct, and is connected to a suspension tool at a position where it cannot be visually recognized from the lower side of the duct. An air flow passage is provided that communicates the inside and the outside of the duct to allow air to flow freely. The combined member is provided with a support part for supporting the air flow passage. The air flow passage is attached to the support part and is provided in a state of being supported by the combined member. The air flow passage is provided in a state of being continuously connected in series in the longitudinal direction of the duct, and is a duct system.

2. The duct system according to Claim 1, wherein the combined member is formed in a U-shaped cross-sectional shape with the lower side open or a lip groove shape with the lower side open.

3. A duct made of cardboard, and a combined member disposed inside the duct, functioning as a reinforcing member for reinforcing the duct and also functioning as a suspension member for suspending and supporting the duct, are provided. The suspension function part of the combined member functioning as a suspension member is housed within the width of the duct and is connected to a suspension tool at a position where it cannot be visually recognized from the lower side of the duct. A plurality of the ducts are arranged at intervals in the vertical direction. The duct disposed on the lower side is suspended and supported using the combined member provided in the duct disposed on the upper side, and is a duct system.

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