Line box mounting structure

Abstract

The present invention provides a line box mounting structure that can reduce the occurrence of condensation and further prevent deformation of the line box. [Solution] The line box is fixed to the ceiling structure of the building by fixing members placed on the ceiling wall. With the ceiling wall 12a sandwiched from above and below by the first plate member 42 and the second plate member 44, the resin outer perimeter bolt 46a engages with the through holes of the first plate member 42 and the second plate member 44. The metal shaft bolt engages with the bolt through hole, which is the through hole of the outer perimeter bolt 46a, and is fixed to the ceiling structure. The shaft bolt is positioned by a metal shaft.

Description

Technical Field

[0001] The present invention relates to an attachment structure of a line box connected to a duct for sending air-conditioned air.

Background Art

[0002] Conventionally, a duct extends from an air conditioner arranged in a ceiling structure or the like located in the ceiling space of a building, and air-conditioned air is supplied into a room through an opening (hereinafter referred to as "indoor opening") formed in each air-conditioned area such as a living room from a box body (line box) connected to the duct. (For example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As shown in FIGS. 78(a) and (b), generally, the line box 1Z includes a hollow main body 100 and a cylindrical discharge port 150. Typically, the discharge port 150 is formed in a rectangular parallelepiped cylindrical shape so as to match the indoor opening 200 with respect to the rectangular indoor opening 200.

[0005] For example, the line box 1Z is arranged in the ceiling space so that air-conditioned air is discharged from the indoor opening 200 formed in RoomC which is the ceiling. When the air-conditioned air Air1 (see FIG. 78(a)) is supplied to the opening 110 of the ceiling wall portion 102 (see FIG. 78(b)) of the line box 1Z, the air-conditioned air Air1 passes through the inside of the main body 100 and the discharge port 150 and becomes the discharged air Air2 and is supplied to RoomM which is the room.

[0006] Here, the mounting structure of the line box 1Z to the building's ceiling structure 300 will be described. Generally, as shown in Figures 78(b), 79(a), and (b), the line box 1Z is connected to the building's ceiling structure 300, which is located behind and above Room C, the building's ceiling, by a rod-shaped member 114. In a configuration where the ceiling wall portion 102 of the main body 100 is sandwiched from above and below by metal plates 110 and 112, the metal rod-shaped member 114 engages with the metal plates 110, the ceiling wall portion 102, and the metal plates 112, and the line box 1 is fixed to the ceiling structure 300 by the connection of the rod-shaped member 114 to the ceiling structure 300. In detail, as shown in Figure 79(b), the rod-shaped member 114 consists of a metal shaft bolt 114a and a metal nut 114b. The nut 114b engages with the shaft bolt 114a inside the main body 100 110in. At this time, the nut 114b engages with the shaft bolt 114a in a configuration that contacts the surface of the metal plate 110, thereby positioning and fixing the shaft bolt 114a and the metal plate 110.

[0007] Next, we will explain heat conduction. As shown in Figure 79(b), let Temp.A be the temperature of the space between the main body 100 and the ceiling structure 300 (above the ceiling), and Temp.B be the temperature inside the main body 100 (100in). If Temp.A and Temp.B are different temperatures, condensation may occur on the surface of the metal plate 110 or 112 with the higher temperature due to heat conduction via the shaft bolt 114a. Heat is conducted as shown by arrows T1 to T5. Condensation caused by heat conduction is undesirable because it can cause mold and other problems.

[0008] Next, the deformation of the main body 100 will be explained. As shown in Figure 80(a), when the metal plates 110 and 112 have the same shape in a plan view, and are fixed in such a manner that they completely overlap in a plan view with the ceiling wall portion 102 in between, the portion of the ceiling wall portion 102 that is pressed from below by the metal plate 110 and the portion of the ceiling wall portion 102 that is pressed from above coincide, forming portion 102a. In this case, the ceiling wall portion 102 does not deform. In contrast, as shown in Figure 80(b), when the metal plates 110 and 112 are sandwiched between the ceiling wall portion 102 in such a manner that they do not completely overlap in a plan view, portions 102c and 102d occur in the ceiling wall portion 102 where the portion of the ceiling wall portion 102 that is pressed from below by the metal plate 110 and the portion of the ceiling wall portion 112 that is pressed from above do not coincide. As a result, in section 102c, the force from above is stronger than the force from below, and in section 102d, the force from below is stronger than the force from above. As a result, the ceiling wall section 102 deforms as shown in Figure 80(c), for example.

[0009] If the ceiling wall section 102 deforms, the line box 1Z will not be able to perform its intended function. Now, let's explain the function of the line box 1.

[0010] As shown in Figure 78(a), inside the main body 100, Air 1 spreads out towards the ends of the longitudinal direction where the air pressure is lower (in the direction indicated by arrow Y), and passes through the indoor opening 200 towards Room M. However, since most of Air 1 tends to flow directly below the indoor opening 200, there is a bias in the flow rate of Air 2 along the longitudinal direction of the outlet 150. If the indoor opening 200 is formed on the front (the surface facing the viewer) rather than the ceiling, Air 1 will hit the rear surface opposite the front inside the main body 100 and tend to flow strongly in the direction of arrow Y, and the flow rate of Air 2 will instead increase from both ends of the longitudinal direction of the outlet 150. In this regard, conventionally, the total amount of exhaust air from the indoor opening 200 has been considered important, and it was thought that there was no problem as long as the total amount of exhaust air was a predetermined value. In contrast to this, the inventors of the present invention have developed a technology (hereinafter referred to as "uniformity technology") that makes the airflow rate of the exhaust air uniform depending on the position of the indoor opening 200 in the longitudinal direction.

[0011] Furthermore, the inventors of the present invention have found that even if uniformization technology is applied to the line box 1Z, if the ceiling wall portion 102 deforms, the structure of the line box 1Z changes, causing the uniformization technology to fail to function or to not fully exhibit its function.

[0012] Based on the above, the present invention provides a line box mounting structure that can reduce the occurrence of condensation and prevent deformation of the line box. [Means for solving the problem]

[0013] The first invention is a mounting structure for a line box having a hollow box-shaped line box body and a cylindrical discharge section connected to the line box body for discharging conditioned air sent from the line box body, wherein the line box body is configured to be substantially similar in shape to the discharge section in a plan view, and has a ceiling wall section, a front wall section and a rear wall section arranged parallel to each other, and a pair of side wall sections that close both ends in the longitudinal direction, and the line box is attached to the ceiling structure of a building by fixing members arranged on the ceiling wall section. The fixing member is configured to be fixed to the line box body, and the fixing member includes a first plate member and a second plate member, which are metal plate-shaped members having a longitudinal direction in a plan view and having through holes formed therein; an outer circumferential bolt made of resin, formed in a cylindrical shape with an enlarged diameter portion at its end, which engages with the through holes of the first plate member and the second plate member and has an enlarged diameter portion at its end, in a configuration in which the longitudinal directions of the first plate member and the second plate member are perpendicular to the longitudinal direction of the ceiling wall portion, and the ceiling wall portion is sandwiched from above and below by the first plate member and the second plate member; an outer circumferential nut made of metal, which engages with the outer circumferential bolt on the inside of the line box body to fix the first plate member, the ceiling wall portion and the second plate member; a shaft bolt made of metal, which engages with the bolt through hole, which is the through hole of the outer circumferential bolt, and is fixed to the ceiling structure; and a shaft nut made of metal, which engages with the shaft bolt on the inside of the line box body to fix the shaft bolt and the outer circumferential bolt, wherein the second plate member is located on the outside of the line box body, and the enlarged diameter portion of the outer circumferential bolt is in contact with the second plate member. This configuration positions the outer periphery bolt and the second plate member, and the first plate member is located inside the line box body and has a main plate portion and two side plate portions that are bent from both ends of the main plate portion in the longitudinal direction in the direction in which the ceiling wall portion is located, and the first plate member, the ceiling wall portion and the second plate member are fixed in a state in which the two side plate portions of the first plate member are in contact with both sides of the ceiling wall portion in the short direction, and the first plate member and the second plate member do not come into direct contact with each other, thus forming a line box mounting structure.

[0014] According to the configuration of the first invention, since the metal shaft bolt engages with the bolt through-hole of the resin outer periphery bolt, the shaft bolt does not come into direct contact with the first plate member and the second plate member. Therefore, heat conduction to the first plate member and the second plate member via the shaft bolt is prevented, and condensation is also prevented. Furthermore, since the first plate member, the ceiling wall, and the second plate member are fixed when the two side plates of the first plate member are in contact with both sides of the ceiling wall in the short direction, the first plate member does not rotate on the surface of the ceiling wall, and the positional relationship between the first plate member and the second plate member is also fixed. This prevents deformation of the line box. And since the first plate member and the second plate member do not come into direct contact, heat conduction between the first plate member and the second plate member does not occur.

[0015] The second invention is a line box mounting structure in which, in the configuration of the first invention, the angle at which the side plate portion of the first plate member bends from both ends of the main plate portion is any angle within the range of 30 degrees to 90 degrees.

[0016] The third invention is a line box mounting structure in which, in the configuration of the first invention, the fixing member further comprises a resin washer member disposed between the outer peripheral nut and the first plate member and / or between the outer peripheral nut and the shaft nut, and having a through hole formed in the center.

[0017] According to the configuration of the third invention, a resin washer member is placed between the outer nut and the first plate member, and / or between the outer nut and the shaft nut. As a result, the degree to which heat conducted from the shaft bolt to the shaft nut is conducted to the first plate member is reduced, thereby preventing condensation from forming on the surface of the first plate member. Moreover, the washer member prevents the outer nut and the nut for the shaft bolt from loosening.

[0018] The fourth invention is a line box mounting structure in which, in the configuration of the first invention, the portions of the shaft bolt, the outer nut, and the shaft nut that are exposed inside the line box body are coated with a resin-containing substance.

[0019] According to the configuration of the fourth invention, in the shaft bolt, the outer peripheral nut, and the shaft nut, since the portion exposed inside the line box body is coated with a resin-containing substance, the occurrence of dew condensation on the surfaces of the shaft bolt, the outer peripheral nut, and the shaft nut is also prevented.

[0020] The fifth invention is an attachment structure of a line box in the configuration of the first invention, wherein at both ends of the main plate portion of the first plate member along the longitudinal direction, bent portions that are bent in a direction opposite to the side plate portion are formed.

[0021] According to the configuration of the fifth invention, the mechanical strength of the first plate member is increased by the bent portions. Therefore, the possibility of the first plate member being deformed is reduced, and as a result, the possibility of the ceiling wall member being deformed is also reduced.

Effects of the Invention

[0022] According to the attachment structure of the line box according to the present invention, the occurrence of dew condensation can be reduced, and furthermore, the deformation of the line box can be prevented.

Brief Description of the Drawings

[0023] [Figure 1] It is a schematic perspective view showing a line box and its attachment structure according to the first embodiment of the present invention. [Figure 2] It is a schematic perspective view showing the internal structure of the line box and its attachment structure. [Figure 3] It is a schematic perspective view showing the main members constituting the line box body. [Figure 4] It is a schematic plan view showing the main members constituting the line box body. [Figure 5] It is a schematic perspective view showing the members that are the basis of the main members constituting the line box body. [Figure 6] It is a conceptual diagram of the cross-section of the microduct board. [Figure 7] It is a conceptual diagram in which a notch is formed in the cross-section of the microduct board. [Figure 8] This is a schematic perspective view showing the partition plates that divide the main body of the line box in the longitudinal direction. [Figure 9] This is a schematic perspective view showing the components that make up the partition plate. [Figure 10] This is a schematic diagram of the side wall section that makes up the main body of the line box. [Figure 11] This is a schematic perspective view showing the supply port. [Figure 12] This is a schematic diagram showing the components that make up the supply port. [Figure 13] This is a schematic perspective view showing the blade members that make up the supply port. [Figure 14] This is a schematic diagram showing the components that form the basis of the blade members. [Figure 15] These are schematic perspective views, schematic plan views, and schematic enlarged views showing plate-shaped members. [Figure 16] This is a schematic side view showing a plate-shaped member, and a schematic diagram showing a plate-shaped member according to a reference embodiment. [Figure 17] This is a schematic perspective view showing corner frame members for reinforcing the corners along the longitudinal direction of the line box body. [Figure 18] This is a schematic diagram showing the components that form the basis of the square frame members. [Figure 19] This is a schematic perspective view showing end frame members for reinforcing the longitudinal ends of the line box body. [Figure 20] This is a schematic perspective view showing a U-shaped member for reinforcing the fixing of a corner frame member. [Figure 21] This is a schematic perspective view showing the fixing members for securing the line box to the ceiling structure. [Figure 22] This is a schematic perspective view showing the outer bolts that make up the fixing member. [Figure 23] This is a conceptual diagram showing the internal structure of the outer bolt. [Figure 24] This is a schematic diagram showing the components that make up the discharge section. [Figure 25] This is a schematic diagram showing the components that make up the discharge section. [Figure 26]This is a conceptual diagram showing the components that make up the discharge section. [Figure 27] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 28] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 29] This is a schematic enlarged view of the vicinity of the end portion in the longitudinal direction of the main member. [Figure 30] This is a schematic cross-sectional view of the main member near its end in the longitudinal direction. [Figure 31] This is a schematic enlarged view of the plate-shaped member. [Figure 32] This is a schematic enlarged view of the outer bolts. [Figure 33] This is a schematic diagram showing the connection method between the plate-shaped member and the ceiling wall section. [Figure 34] This is a schematic diagram showing the connection configuration between the plate-shaped member and the main member. [Figure 35] This is a schematic diagram showing the connection configuration between the plate-shaped member and the main member. [Figure 36] This is a schematic diagram showing the connection configuration between the fixing member and the main member. [Figure 37] This is a schematic diagram showing the connection configuration between the fixing member and the main member. [Figure 38] This is a schematic diagram showing the connection configuration between the fixing member and the main member. [Figure 39] This is a schematic diagram showing how the line box is fixed to the ceiling structure. [Figure 40] This is a schematic diagram showing how the line box is fixed to the ceiling structure. [Figure 41] This is a diagram illustrating heat conduction in fixing members. [Figure 42] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 43] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 44] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 45] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 46] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 47] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 48] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 49] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 50] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 51] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 52] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 53] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 54] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 55] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 56] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 57] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 58] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 59] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 60] This is a schematic diagram illustrating the manufacturing process of a line box. [Figure 61] This is a schematic cross-sectional view of the line box in a direction perpendicular to the longitudinal direction. [Figure 62] This is a schematic diagram illustrating the effects of a line box. [Figure 63] This is a schematic diagram illustrating the effects of a line box. [Figure 64] This is a schematic diagram illustrating the effects of a line box. [Figure 65] This is a schematic diagram illustrating the effects of a line box. [Figure 66] This is a schematic diagram illustrating the effects of a line box. [Figure 67] This is a schematic diagram illustrating the effects of a line box. [Figure 68] This is a schematic diagram illustrating the effects of a line box. [Figure 69] This is a schematic diagram showing a fixing member for a line box according to a second embodiment of the present invention. [Figure 70] This is a diagram illustrating the mounting structure and heat conduction of the line box. [Figure 71] This figure illustrates a line box mounting structure and heat conduction according to a modified example of the second embodiment of the present invention. [Figure 72] This figure illustrates a line box mounting structure and heat conduction according to a modified example of the second embodiment of the present invention. [Figure 73] This is a schematic diagram showing a fixing member for a line box according to a third embodiment of the present invention. [Figure 74] This diagram conceptually shows the components that make up the box body of a line box according to the fourth embodiment of the present invention. [Figure 75] This is a diagram conceptually showing the box body of a line box according to the fourth embodiment of the present invention. [Figure 76] This is a schematic diagram showing a fixing member for a line box according to a fourth embodiment of the present invention. [Figure 77] This is a schematic cross-sectional view showing a line box mounting structure according to a fourth embodiment of the present invention. [Figure 78] This is a schematic diagram illustrating a conventional line box. [Figure 79] This is a schematic diagram showing the mounting structure of a conventional line box. [Figure 80] This diagram illustrates the problems with conventional line box mounting structures. [Modes for carrying out the invention]

[0024] Preferred embodiments of the present invention will be described below with reference to the drawings. Configurations that can be appropriately implemented by those skilled in the art will be omitted from the description, and only the basic configuration of the present invention will be described.

[0025] <First Embodiment> <Outline structure of a line box> The general configuration of line box 1 (hereinafter referred to as "line box 1") will be described with reference to Figures 1 and 2. Figure 1 is a schematic perspective view showing line box 1 fixed to ceiling structure 300. Figure 2 is a schematic perspective view showing the internal structure of line box 1 with the outside indicated by a dotted line. In the drawings attached to this specification, the outside is indicated by a dotted line as appropriate to show the internal structure. In this specification, unless a direction is specified in the description of each figure, a view from the direction of arrow Z1 in Figure 1 is referred to as a plan view. Also, unless a direction is specified in the description of each figure, the direction indicated by arrow Z in Figure 1 is referred to as the up and down direction.

[0026] As shown in Figure 1, the line box 1 has a line box body 10 (hereinafter referred to as "body 10") and a discharge section 50 connected to the body 10. The body 10 is formed in the shape of a hollow box that is elongated in one direction. The discharge section 50 is formed as a cylindrical member having a longitudinal direction and discharges the conditioned air sent from the body 10.

[0027] The discharge section 50 is formed in a cylindrical shape with an opening in the vertical direction. In a plan view from the direction of arrow Z1, the discharge section 50 is formed in a substantially rectangular shape. The two long sides of the substantially rectangular shape of the discharge section 50 are arranged parallel to each other.

[0028] A heat insulating sheet 36 is arranged on the outer circumferential surface of the discharge section 50 in a manner that it is in contact with the main body 10. The sheet 36 is made of foamed plastic, for example, an adhesive heat insulating tape made of foamed plastic. The dimensions of the adhesive heat insulating tape are, for example, 75 millimeters (mm) in width and 3 millimeters (mm) in thickness.

[0029] The main body 10 is a hollow, box-shaped component, approximately a rectangular parallelepiped. In plan view, the main body 10 is configured to be approximately similar in shape to the discharge section 50. The part of the main body 10 that connects to the discharge section 50 is open, forming a connection opening that allows gas to pass through. In the main body 10, a supply port 40 is located in the ceiling portion on the opposite end from the discharge section 50 in the vertical direction. The supply port 40 allows conditioned air A1 (hereinafter referred to as "inflow airflow A1") sent from the air conditioner via the duct 202 to be taken into the interior of the main body 10.

[0030] The incoming airflow A1 that enters the main body 10 from the supply port 40 is rectified inside the main body 10 and discharged as the outgoing airflow A2. The air constituting the incoming airflow A1 is, for example, air whose temperature and humidity have been adjusted by an air conditioner. In this specification, "rectification" means expanding the range over which the incoming airflow A1 flows. Due to the structure of the main body 10 in this embodiment, the flow rate of the incoming airflow A1 is uniformly adjusted along the longitudinal direction of the main body 10. As a result, there is no significant difference in the airflow volume of the outgoing airflow A2 at any position along the longitudinal direction of the discharge section 50.

[0031] As shown in Figure 2, the main body 10 is divided into unit spaces S1 and S2 by a partition plate 16. A supply port 40 is provided for each unit space S1 and S2, and a plate-shaped member 70 is horizontally positioned below the supply port 40. Multiple through holes are formed in the plate-shaped member 70, distributed substantially uniformly. In a plan view, the plate-shaped member 70 overlaps with the opening surface of the supply port 40 and is formed to be larger than the opening surface, and is positioned to correspond to only a portion of the longitudinal direction of the unit space S1 or S2, rather than the entire length. Due to the above structure of the main body 10, a portion of the inflow airflow A1 passes through the through holes in the plate-shaped member 70 and is discharged from the discharge section 50 as the discharge airflow A2. Another portion of the inflow airflow A1 strikes the plate-shaped member 70, changes direction, and flows towards the discharge section 50 from the portion where the plate-shaped member 70 is not present, and is discharged as the discharge airflow A2. The above structure is one embodiment of the uniformization technology developed by the inventor of the present invention.

[0032] The line box 1 is fixed to the ceiling structure 300 by a fixing member 41 (see Figure 21). The line box 1 is directly connected to the ceiling structure 300 by a shaft portion 46b.

[0033] By fixing the line box 1 to the ceiling structure 300 using the fixing member 41, the possibility of condensation on the outer and inner surfaces of the line box 1 is reduced. Furthermore, by fixing the line box 1 to the ceiling structure 300 using the fixing member 41, deformation and tilting of each component of the line box 1 are prevented, and the above-mentioned uniformization technology functions fully.

[0034] In the first embodiment, the opening area of ​​the duct 202 that sends conditioned air from the air conditioner to the main unit 10 and the opening area of ​​the supply port 40 are substantially the same.

[0035] <Main components that make up the main body 10> The main components constituting the main body 10 will be described below with reference to Figures 3 to 10.

[0036] Figure 3 is a schematic perspective view showing the main member 12, which is the most important component of the main body 10. Figure 4 is a plan view showing the main member 12. In Figures 3 and 4, the direction indicated by arrow Y is called the longitudinal direction, and the direction perpendicular to arrow Y in the plane of the paper is called the width direction. When the main body 10 is assembled, the side of the main member 12 that is visible in Figures 3 and 4 becomes the inside of the main body 10, and the side that is not visible becomes the outside. Also, the parts that become unit spaces S1 and S2 of the main body 10 after assembly are also called unit spaces S1 and S2 in the state of the main member 12 before assembly.

[0037] As shown in Figures 3 and 4, the main member 12 consists of a ceiling wall section 12a and a front wall section 12b and a rear wall section 12c that are arranged parallel to each other. The front wall section 12b and the rear wall section 12c are formed symmetrically with respect to the ceiling wall section 12a. When the line box 1 is manufactured and placed in a building, the front wall section 12b is visible from the front (see Figures 1 and 2).

[0038] A groove 12d is formed between the ceiling wall portion 12a and the front wall portion 12b, and a groove 12e is formed between the ceiling wall portion 12a and the rear wall portion 12c. When assembling the main body 10, the front wall portion 12b is folded towards the front of the paper in Figure 4 with respect to the ceiling wall portion 12a, with groove 12d as the boundary, and the rear wall portion 12c is folded towards the front of the paper with respect to groove 12e as the boundary. The width w3 of the front wall portion 12b and the width w4 of the rear wall portion 12c are the same, and the width w2 of the ceiling wall portion 12a is smaller than the widths w3 and w4. The widths w3 and w4 are values ​​between 120 millimeters (mm) and 250 millimeters (mm), and in this embodiment, for example, they are 200 millimeters (mm). The width w2 is, for example, 190 millimeters (mm). As a result, the main body 10 has a shape in which the vertical direction is larger than the width direction.

[0039] The ceiling wall section 12a is composed of a ceiling base 12as and an outer peripheral section (near both ends) 12ac. The main part of the ceiling wall section 12a is the ceiling base 12as, and the outer peripheral section 12ac is formed at both ends of the ceiling base 12as in the longitudinal direction. The ceiling base 12as is formed to be higher than the outer peripheral section 12ac, with a step in the thickness direction (direction of width w1 in Figure 5). This step forms the side surface 12af, which is the side surface of the ceiling base 12as. In this invention, the ceiling base 12as and the front wall base 12bs and rear wall base 12cs described later are collectively referred to as the "wall base".

[0040] A groove 12ab is formed in the center of the ceiling base 12as in the longitudinal direction. In addition, a ceiling opening 12aa is formed in the center of the ceiling base 12as in the longitudinal direction in each of the unit spaces S1 and S2. The ceiling opening 12aa is an opening for taking conditioned air from the air conditioner into the interior of the main body 10, and a supply port 40 is fitted into it. In a plan view, the ceiling opening 12aa has a shape whose longitudinal direction coincides with the longitudinal direction of the main body 10, and its length in the longitudinal direction is longer than its length in the width direction.

[0041] Furthermore, through holes 12ad are formed in the ceiling base 12as near both ends in the longitudinal direction. The outer bolts 46a of the fixing member 41 (see Figures 21 to 23), which will be described later, pass through the through holes 12ad and are used for fixing.

[0042] The front wall portion 12b is composed of a front wall base portion 12bs and an outer peripheral portion (near both ends) 12bc. The main part of the front wall portion 12b is the front wall base portion 12bs, and the outer peripheral portion 12bc is formed at both ends of the front wall base portion 12bs in the longitudinal direction. The front wall base portion 12bs is formed to be higher than the outer peripheral portion 12bc, with a step in the thickness direction (direction of width w1 in Figure 5). This step forms the side surface 12bf, which is the side surface of the front wall base portion 12bs. In addition, a groove portion 12bb and a notch 12ba are formed in the front wall base portion 12bs.

[0043] The rear wall portion 12c is composed of a rear wall base portion 12cs and an outer peripheral portion (near both ends) 12cc. The main part of the rear wall portion 12c is the rear wall base portion 12cs, and the outer peripheral portion 12cc is formed at both ends of the rear wall base portion 12cs in the longitudinal direction. The rear wall base portion 12cs is formed to be higher than the outer peripheral portion 12cc, with a step in the thickness direction (direction of width w1 in Figure 5). This step forms the side surface 12cf of the rear wall base portion 12cs. In addition, a groove portion 12cb and a notch 12ca are formed in the rear wall base portion 12cs.

[0044] The side wall portion 18 (see Figure 10) is fixed by the outer periphery portions 12ac, 12bc, and 12cc, and the sides 12af, 12bf, and 12cf. The partition plate 16 (see Figure 8) is fixed by the grooves 12ab, 12bb, and 12cb. The widths of the grooves 12ab, 12bb, and 12cb are substantially the same as the width of the partition plate 16 (w1 × 2). When the main body 10 is assembled, the front wall portion 12b and the rear wall portion 12c are folded toward the front of the paper relative to the ceiling wall portion 12a, and the space between the side wall portions 18A and 18B at both ends and the partition plate 16 becomes the unit space S1 and S2 (see Figures 4 and 48). The unit spaces S1 and S2 are configured symmetrically with respect to the partition plate 16.

[0045] The ceiling opening 12aa is formed in the substantially central part of the longitudinal direction of the ceiling wall portion 12a in the unit space S1 and S2, respectively. As shown in Figure 4, the distance L3 between the grooves 12ab, 12bb, and 12cb and one end of the ceiling opening 12aa is substantially the same as the distance L4 between the other end of the ceiling opening 12aa and the outer periphery 12ac.

[0046] The notches 12ba are formed in substantially the central part of the longitudinal direction of the front wall portion 12b in each unit space S1 and S2. Similarly, the notches 12ca are formed in substantially the central part of the longitudinal direction of the rear wall portion 12c in each unit space S1 and S2.

[0047] The notches 12ba and 12ca are notches along the longitudinal direction (direction indicated by arrow Y) of the main member 12. When the main body 10 is assembled, distance w5 is the distance from the tip of the supply port 40, which is positioned flush with the ceiling base 12as of the ceiling wall portion 12a. This distance (hereinafter referred to as the "discrepancy distance") is defined as the distance required to equalize the airflow of the air discharged in the longitudinal direction of the discharge port 50 by causing the conditioned air flowing in from the supply port 40 to hit the plate-shaped member 70 and become a reflected airflow, thereby applying a complex external force to the conditioned air. The discrepancy distance is any distance within the range of 3 centimeters (cm) to 15 centimeters (cm). In this embodiment, the notches 12ba and 12ca are formed substantially in the center in the width direction of the front wall portion 12b and the rear wall portion 12c, respectively, and for example, for notch 12ca, distances w5 and w6 are the same. Distances w5 and w6 are approximately 10 centimeters (cm).

[0048] The lengths L2 of the notches 12ba and 12ca are longer than the length L1 of the ceiling opening 12aa. The notches 12ba and 12ca allow the plate-shaped members 70 (see Figures 15 and 16) to be positioned in the respective unit spaces S1 and S2.

[0049] The main component 12 is manufactured by cutting a microduct board into a plate-shaped intermediate component 12pre as shown in Figure 5, and then further machining it. For example, the outer periphery of the intermediate component 12pre is machined to a point where it is 50% of the thickness w1 to form the outer periphery 12ac, outer periphery 12bc, and outer periphery 12cc.

[0050] Microduct boards are also called glass boards. Microduct boards are plate-like materials made by solidifying glass fibers with a thermosetting resin and finishing the outer part with aluminum foil reinforced with glass yarn. Figure 6 is a schematic cross-sectional view of a microduct board 17. The microduct board 17 has a black nonwoven fabric layer 17a, an adhesive layer 17b, a glass wool layer 17c, an adhesive layer 17d, and a surface layer 17e. The glass wool layer 17c is formed by solidifying glass fibers with a thermosetting resin. The surface layer 17e is aluminum foil reinforced with glass yarn. The nonwoven fabric layer 17a and the glass wool layer 17c are fixed by the adhesive layer 17b, and the glass wool layer 17c and the surface layer 17e are fixed by the adhesive layer 17d.

[0051] The nonwoven fabric layer 17a constitutes the inner surface of the main body 10, and the surface layer 17e constitutes the outer surface of the main body 10.

[0052] Microduct boards offer excellent heat insulation and soundproofing properties, allowing for quiet air transport without significantly altering air temperature. Furthermore, microduct boards are lightweight, significantly lighter than the steel plates commonly used in ducts. The microduct board of this embodiment weighs approximately 64 kilograms (kg / m²) per cubic meter. 3). If the component formed by processing the microduct board in this embodiment were made of a metal steel plate, the weight would increase by approximately 35%. The thickness w1 of the microduct board is 25 millimeters (mm). Furthermore, the microduct board is a material with considerable elasticity, and within a predetermined range, even if it is deformed once, its shape will return to its original state due to elastic force. That is, when the microduct board is pressed and deformed, it generates an elastic recovery force. In this embodiment, for example, MDB24 microduct board from Mag-Isover Co., Ltd. is used.

[0053] Figure 7 is a conceptual diagram showing cross-sections in the width direction of grooves 12d and 12e. As shown in Figure 7, the microduct board 17 is cut at a 45-degree angle from the nonwoven fabric layer 17a toward the surface layer 17e, leaving only the surface layer 17e, or only the surface layer 17e and the adhesive layer 17d.

[0054] The partition plate 16 shown in Figure 8 is formed by bonding two original members 16pre shown in Figure 9 together. The original members 16pre are manufactured by cutting a microduct board similar to that used for the main member 12. The surface 16c1 of the original members 16pre is a nonwoven fabric layer 17a, and the back surface 16c2 is a surface layer 17e. As shown in Figure 8, the back surfaces 16c2 of the two original members 16pre are bonded together to form the partition plate 16. As a result, in the partition plate 16, both the surface and the back surface are the surface 16c1 of the original members 16pre, i.e., the nonwoven fabric layer 17a.

[0055] The partition plate 16 consists of a base portion 16a and a projection portion 16b. The width w16b of the projection portion 16b is smaller than the width w16a of the base portion 16a. The overall height of the partition plate 16 is h16, and its thickness is twice w1.

[0056] The side walls 18A and 18B shown in Figure 10 are formed by cutting the microduct board 17. The width of the side walls 18A and 18B is w18, and the height is h18. The height h18 is equal to the height h16 of the partition plate 16. The surface 18a of the side walls 18A and 18B is consistent with the nonwoven fabric layer 17a of the microduct board 17, and the back surface 18b is consistent with the surface layer 17e.

[0057] <Regarding the supply outlet> The supply port 40 will be described with reference to Figures 11 and 12. The supply port 40 shown in Figure 11 is a cylindrical member as a whole, and is composed of a cylindrical body 40a and a wing portion 40b. The supply port 40 is constructed by processing a metal plate. The metal plate is, for example, a galvanized steel plate (Z18) having a thickness of 0.6 mm to 2.3 mm. In this embodiment, the thickness of the metal plate is 0.6 mm.

[0058] Figure 12(a) is a schematic perspective view of the cylindrical body 40a, and Figure 12(b) is a schematic plan view of the cylindrical body 40a viewed from the direction of arrow Z2. The opening surface of the cylindrical body 40a is formed in a shape similar to the ceiling opening 12aa of the ceiling wall portion 12a. The shape of the opening surface of the cylindrical body 40a is smaller than the ceiling opening 12aa by the amount of the metal plate forming the cylindrical body 40a.

[0059] As shown in Figures 12(a) and 12(b), the cylindrical body 40a is formed in a shape where the opening surface is in the longitudinal direction. That is, the length L40 is greater than the width w40.

[0060] Figure 13 is a schematic perspective view showing the blade portion 40b, and Figure 14 is a schematic diagram showing the base member 40bpre from which the blade portion 40b is manufactured. The base member 40bpre is a member having a longitudinal direction and is formed in a rectangular shape in the plan view shown in Figure 14. As shown by arrow Y1, the blade portion 40b is formed by bending the upper part 40ba at a right angle toward the lower part 40bb side, with the center line 40bc as the boundary. Two blade portions 40b are manufactured for each supply port 40.

[0061] As will be described later, the supply port 40 is inserted into the ceiling opening 12aa from the outer surface side of the ceiling wall portion 12a. At this time, the blade portion 40b comes into contact with the outer surface of the ceiling wall portion 12a, and the supply port 40 is positioned relative to the ceiling wall portion 12a. When the main body 10 is assembled, the tip portion 40aa of the supply port 40 is exposed inside the unit spaces S1 and S2.

[0062] <Regarding plate-like materials (perforated metal)> The plate-shaped member 70 will be described with reference to Figures 15 and 16. As shown in Figure 15, the plate-shaped member 70 consists of a plate-shaped base 70a and a plurality of through holes 70b. The plate-shaped member 70 is made by processing a metal plate. The metal plate is, for example, a galvanized steel plate (Z18) having a thickness of 0.6 mm to 2.3 mm. In this embodiment, the thickness of the metal plate is 0.6 mm. The plate-shaped member 70 is manufactured by cutting the metal plate to the outer shape of the plate-shaped member 70 and further forming a plurality of through holes 70b.

[0063] In the plate-shaped member 70, the multiple through holes 70b are substantially uniformly distributed. As described later, the plate-shaped member 70 is fixed with its longitudinal end inserted into the notches 12ba of the front wall portion 12b and the notches 12ca of the rear wall portion 12c. On the main surface of the plate-shaped member 70 (the surface shown in Figure 15(b)), the portion exposed to the inside of the main body 10 when the line box 1 is completed (see Figure 2) is the portion with a width w71 in Figure 15(b). When the main body 10 is assembled, the plate-shaped member 70 is positioned in a plan view such that it overlaps with the opening surface of the supply port 40, is longer than the length of the supply port 40, and corresponds to only a portion of the longitudinal direction of the unit space S1 or S2, rather than the entirety of it.

[0064] In this embodiment, the length L70 of the plate-shaped member 70 in the longitudinal direction is longer than the length L40 of the supply port 40. The width of the plate-shaped member 70 is w70, but the width that is exposed when the main body 10 is assembled is w71. The width w71 is greater than the width w40 of the supply port 40. The widths ((w70-w71) / 2) of both ends of the plate-shaped member 70 along the longitudinal direction are 12.5 millimeters (mm) each. When the main body 10 is assembled, both ends of the plate-shaped member 70 along the longitudinal direction are inserted into notches 12ba and 12ca (see Figures 3 and 4) and fixed in a manner that they are sandwiched between the front wall portion 12b and the rear wall portion 12c. The depths of notches 12ba and 12ca are 12.5 millimeters (mm) each. Therefore, the width w71 of the portion of the plate-like member 70 that is exposed to the unit spaces S1 and S2 is the same as the width w2 of the ceiling wall portion 12a.

[0065] In the plate-shaped member 70, the ratio of the total area M70b of the openings formed by the multiple through holes 70b to the total area M70 of the plate-shaped member 70 (M70b / M70) is between 5 / 10 and 8 / 10. In this embodiment, the ratio (M70b / M70) is 6 / 10.

[0066] Figure 15(c) is a schematic enlarged view of a part of the plate-shaped member 70 shown in Figure 15(b). In Figure 15(c), the imaginary lines A1 to A13 are lines along the longitudinal direction of the plate-shaped member 70 and are arranged at equal intervals. The imaginary lines B1 to B7 are lines along the short direction of the plate-shaped member 70 and are arranged at equal intervals from each other. The imaginary lines A1 to A13 and the imaginary lines B1 to B7 are perpendicular to each other and form a grid. The through holes 70b are located at the intersections of imaginary lines A1, B1, etc. However, in both the longitudinal and short directions, adjacent through holes 70b are not located at adjacent intersections. In both the longitudinal and short directions, adjacent through holes 70b are located at the intersection next to an adjacent intersection, not at an adjacent intersection. As a result, adjacent intersections 70b have a distance d1 in the longitudinal direction and a distance d11 in the short direction. In other words, plate-shaped base portions 70a with distances d1 and d11 are secured, ensuring mechanical strength. Unlike this embodiment, if adjacent through holes 70b are placed at adjacent intersections, only a distance d2 can be secured in the longitudinal direction, and only a distance d12 can be secured in the short direction. In other words, only plate-shaped base portions 70a with distances d2 and d12 can be secured, resulting in inferior mechanical strength.

[0067] The plate-shaped member 70 is formed as a flat plate overall. In the main body 10, the plate-shaped member 70 is arranged such that the heights of both ends are substantially equal in the side view shown in Figure 16(a), and is formed in a linear shape. Mechanical strength is ensured by the arrangement of the through holes 70b described above. In the line box 1, the plate-shaped member 70 is hit by airflow from the direction of arrow Z2, but the plate-shaped member 70 maintains its shape and can disperse the airflow in the longitudinal direction as shown by arrows Z11 and Z12.

[0068] In contrast, in the plate-shaped member 70X of the reference embodiment shown in Figure 16(b), if we consider a grid pattern similar to that in Figure 15(c), adjacent through holes 70b are positioned at adjacent intersections. Therefore, the distance between adjacent through holes 70b is shorter than that of the plate-shaped member 70 in the above embodiment, both in the longitudinal and transverse directions, resulting in inferior mechanical strength. Consequently, as shown in Figure 16(c), when airflow strikes the plate-shaped member 70X from the direction of arrow Z2, the plate-shaped member 70X tends to deform convexly in the same direction as arrow Z2, and the airflow striking the plate-shaped member 70X does not easily disperse in the longitudinal direction, as shown by arrows Z21 and Z22, but rather tends to move towards the center. However, the present invention does not exclude the configuration of the plate-shaped member 70X.

[0069] <Regarding corner frame members> The square frame member 30 shown in Figure 17 is formed by processing the original member 30pre shown in Figure 18. The original member 30pre is made by processing a metal plate. The metal plate is, for example, a galvanized steel plate (Z18) having a thickness of 0.6 mm to 2.3 mm. In this embodiment, the thickness of the metal plate is 0.6 mm.

[0070] The original member 30pre is a member with a longitudinal direction and is formed as a rectangle in the plan view shown in Figure 18. As shown by arrow Y1, the upper part 30a is bent at a right angle toward the lower part 30b with respect to the center line 30c to form the corner frame member 30. Four corner frame members 30 are manufactured for each line box 1.

[0071] <Regarding end frame members> The end frame member 32 shown in Figure 19 is constructed by processing a metal plate similar to the square frame member 30 described above. Two end frame members 32 are manufactured for each main body 10. The two end frame members 32 are referred to as end frame members 32A and 32B, and collectively as end frame member 32. The end frame member 32 consists of a front wall portion 32a with a rectangular through hole 32s formed therein, and side wall portions 32b to 32e. The side wall portions 32b to 32e are formed continuously on the four sides that constitute the outer periphery of the front wall portion 32a and are formed perpendicular to the front wall 32a.

[0072] <Regarding the U-shaped member> Referring to Figure 20, the U-shaped member 34 will be described. The U-shaped member 34 is constructed by processing a metal plate similar to the square frame member 30 described above. The U-shaped member 34 is formed of a rectangular base 34a having a longitudinal direction in plan view, and upright portions 34b and 34c that are formed by bending perpendicularly from both ends of the base 34a. The upright portions 34b and 34c are bent in the same direction relative to the base 34a. Through holes 34p for passing screws to connect to other members are formed near both ends of the base 34a and near the upper ends of the upright portions 34b and 34c.

[0073] <Regarding fixing components> Figures 21 to 23 are schematic diagrams showing fixing members 41 for suspending and securing the line box 1 to the ceiling structure 300 on the back side of the building's ceiling. The fixing members 41 will be described in detail later, but a general overview is given here. The fixing members 41 consist of a plate-shaped member 42, a plate-shaped member 44, and a bolt member 46. The plate-shaped members 42 and 44 are made by processing metal plates similar to the square frame member 30 described above.

[0074] As shown in Figure 21, the plate-like members 42 and 44 are members having a longitudinal direction (the direction indicated by arrow X44) and are formed in a rectangular contour shape in plan view. As shown in Figure 21, the plate-like member 42 consists of a rectangular main plate portion 42a and side plate portions 42b and 42c formed by bending downward at a 45-degree angle from both ends of the main plate portion 42a in the longitudinal direction. The direction in which the side plate portions 42b and 42c bend is downward in Figure 21, in the direction of the ceiling wall portion 12a when placed on the main body 10, and upward when the line box 1 is fixed to the ceiling structure 300. The angle at which the side plate portions 42b and 42c bend is any angle in the range of 30 degrees to 90 degrees, but in this embodiment it is 45 degrees so as to match the angles of the groove portions 12d and 12e (see Figures 3, 4 and 7). A through hole 42s is formed in the center of the main plate portion 42a.

[0075] The plate-shaped member 44 is a rectangular member with a through hole 44s1 formed in its center. Through holes 44s2 are formed near both ends of the plate-shaped member 44. The through hole 42s of the plate-shaped member 42 and the through hole 44s1 of the plate-shaped member 44 engage with the outer peripheral bolt 46a, which will be described later. The through hole 44s2 of the plate-shaped member 44 is a hole for a screw to engage with for fixing it to the square frame member 30, which will be described later. The square frame member 30 is fixed from the outer surface side (44a1 side) of the plate-shaped member 44. The plate-shaped member 42 is an example of a first plate member, and the plate-shaped member 44 is an example of a second plate member.

[0076] The bolt member 46 consists of an outer circumferential bolt 46a, a shaft bolt 46b, an outer circumferential nut 46d that engages with the outer circumferential bolt 46a, and a shaft bolt nut 46c that engages with the shaft bolt 46b. Figure 22 is a schematic perspective view of the outer circumferential bolt 46a viewed from above and below. Figure 23 is a conceptual diagram showing the internal structure of the outer circumferential bolt 46a. The outer circumferential bolt 46a is made of resin and is formed by injection molding of resin. The resin that constitutes the outer circumferential bolt 46a is, for example, PEEK (polyetheretherketone). However, the resin is not limited to PEEK and may be, for example, PPS (polyphenylene sulfide). The shaft bolt 46b, the shaft bolt nut 46c, and the outer circumferential nut 46d are made of metal.

[0077] As shown in Figure 22, the outer circumferential bolt 46a has a cylindrical central part 46aa and an enlarged diameter portion 46ab formed at the longitudinal end. A thread 46ac is formed on the outer circumference of the central part 46aa. A through hole 46as is also formed in the central part 46aa.

[0078] In Figure 23, the screw threads 46ac on the outer circumference are omitted. As shown in Figure 23, a through hole 46as is formed in the outer bolt 46a.

[0079] The shaft bolt 46b consists of a shaft portion 46ba and a screw 46bb. The length of the shaft portion 46ba is sufficiently greater than the length of the outer bolt 46a.

[0080] The length L46aa of the central part 46aa of the outer peripheral bolt 46a is greater than the combined thickness of the ceiling base 12as of the ceiling wall portion 12a and the plate-like members 42 and 44. The central part 46aa penetrates from the through-hole 44s1 side toward the through-hole 42s with the ceiling wall portion 12a in between, with the positions of the through-holes 42s, 44s1 and 12ad of the plate-like members 42 and 44 aligned, and is fixed by the outer peripheral nut 46d in contact with the surface 42a1 of the main plate portion 42a of the plate-like member 42. At this time, the enlarged diameter portion 46ab of the outer peripheral bolt 46a abuts against the surface 44a1 of the plate-like member 44 and is positioned in relation to the plate-like member 44.

[0081] Then, the shaft bolt 46b is inserted into the through hole 46as of the outer perimeter bolt 46a. The portion of the shaft bolt 46b that protrudes from the ceiling wall portion 12a is fixed to the building's ceiling structure 300.

[0082] <Regarding the discharge section> The discharge section 50 consists of a front plate section 50A shown in Figure 24, a rear plate section 50B shown in Figure 25, and a side plate section 60 shown in Figure 26. The side plate section 60 is composed of side plate members 60A and 60B. The front plate section 50A, the rear plate section 50B, and the side plate members 60A and 60B are made by processing metal plates similar to the square frame member 30 and the like described above.

[0083] As shown in Figure 24, the front plate portion 50A is composed of a first plate member 52 and a second plate member 54. In the plan view shown in Figure 24, the first plate member 52 and the second plate member 54 are formed in a roughly rectangular shape and have a length of L3 before assembly of the main body 10. Length L3 is substantially the same as length L12 (see Figure 4) of the main member 12, excluding the outer peripheral portions 12ac, 12bc, and 12cc. More precisely, length L3 is twice the thickness of the metal plate (approximately 1.2 millimeters) shorter than length L12.

[0084] The second plate member 54 is composed of a main portion 54a and a rectangular portion 54b. When the first plate member 52 and the second plate member 54 are fixed together, the second plate member 54 is bent at a 90-degree angle toward the back of the paper relative to the main portion 54a along the boundary line 54L between the main portion 54a and the rectangular portion 54b. Then, as shown by arrow Y3, the main portion 54a of the second plate member 54 is fixed to the back of the paper of the first plate member 52 by welding, in an embodiment where the lower end 54aa of the main portion 54a overlaps with the lower end 52b of the first plate member 52.

[0085] As shown in Figure 25, the rear plate portion 50B is composed of a third plate member 56 and a fourth plate member 58. In the plan view shown in Figure 25, the third plate member 56 and the fourth plate member 58 are formed in a substantially rectangular shape and have a length L4 before the assembly of the main body 10. The length L4 is equal to the length L3 of the front plate portion 50A described above.

[0086] The fourth plate member 58 is composed of a main portion 58a and a rectangular portion 58b. When the third plate member 56 and the fourth plate member 58 are fixed together, the fourth plate member 58 is bent at a 90-degree angle toward the front of the paper with respect to the main portion 58a, along the boundary line 58L between the main portion 58a and the rectangular portion 58b. Then, as shown by arrow Y4, the main portion 58a of the fourth plate member 58 is fixed to the front of the paper side of the third plate member 56 by welding, in an embodiment where the lower end 58aa of the main portion 58a overlaps with the lower end 56b of the third plate member 56.

[0087] As shown in Figure 26, the side panels 60A and 60B are composed of a central section 60a, and side sections 60b and 60c, respectively. In the manufacturing process of line box 1, the side sections 60b and 60c are folded at a 90-degree angle relative to the central section 60a in the direction towards the viewer in Figure 26.

[0088] <Regarding the assembly process of line box 1> The assembly process for line box 1 will be described below with reference to Figures 27 to 61. Note that in the description of the assembly process for line box 1, the vertical orientation of each component constituting line box 1 is reversed compared to when line box 1 is attached to a structure (see Figures 1 and 2).

[0089] As shown in Figure 28, with respect to the main member 12 shown in Figure 27, fixing members 41 such as plate-shaped members 42 and 44 are arranged on the ceiling wall 12a in a direction in which the longitudinal directions of the plate-shaped members 42 and 44 are perpendicular to the longitudinal direction of the ceiling wall 12a.

[0090] <<Placement of fixing members for the ceiling and wall, and fixing to the ceiling structure>> Here, after explaining the placement of the ceiling wall section 12a onto the fixing member 41, we will insert an explanation of the subsequent manufacturing process and its effects in relation to the fixing member 41, separate from the overall assembly process of the line box 1.

[0091] Figure 29 is a schematic enlarged view of the vicinity of the end in the longitudinal direction of the main member 12 shown in Figure 28. Figure 30 is a schematic cross-sectional view of the vicinity of the end in the longitudinal direction of the main member 12, and is a schematic cross-sectional view along line BB in Figure 29.

[0092] As shown in Figure 30, the outer surface of the ceiling base 12as is designated as the outer surface 12as1, and the inner surface is designated as the inner surface 12as2. When the main body 10 is assembled, the outer surface 12as1 is the outer surface, and the inner surface 12as2 is the inner surface. The through hole 12as penetrates between the outer surface 12as1 and the inner surface 12as2.

[0093] In the groove 12d, the inclined surface on the ceiling wall 12a side is defined as slope 12d1, and the inclined surface on the front wall 12b side is defined as slope 12d2. Slope 12d1 is also the side of the ceiling wall 12a in the short direction, and slope 12d2 is also the side of the front wall 12b in the short direction. In the groove 12e, the inclined surface on the ceiling wall 12a side is defined as slope 12e1, and the inclined surface on the rear wall 12c side is defined as slope 12e2. Slope 12e1 is also the side of the ceiling wall 12a in the short direction, and slope 12e2 is also the side of the rear wall 12c in the short direction.

[0094] Figure 31 is a schematic enlarged view of the plate-shaped members 42 and 44, and Figure 32 is a schematic enlarged view of the outer perimeter bolt 46a.

[0095] As shown in Figure 31, the front surface of the main plate portion 42a of the plate-shaped member 42 is designated as the front surface 42a1, and the back surface as the back surface 42a2. The front surface of the side plate portion 42b is designated as the front surface 42b1, and the back surface as the back surface 42b2. The front surface of the side plate portion 42c is designated as the front surface 42c1, and the back surface as the back surface 42c2. The end of the side plate portion 42b is designated as the end surface 42b3, and the end of the side plate portion 42c is designated as the end surface 42c3. When the main body 10 is assembled, the front surface 42a1 is exposed inside the box body 10.

[0096] Furthermore, the front surface of the plate-shaped member 44 is designated as the front surface 44a1, and the back surface as the back surface 44a2. The ends of the plate-shaped member 44 are designated as the ends 44c and 44d. When the main body 10 is assembled, the front surface 44a1 is exposed to the outside of the box body 10.

[0097] As shown in Figure 32, in the enlarged diameter portion 46ab of the outer peripheral bolt 46a, the surface not facing the center 46aa is designated as the front surface 46ab1, and the surface facing the center 46aa is designated as the back surface 46ab2. When the outer peripheral bolt 46a penetrates the through hole 44s1 of the second plate member 44, the front surface 46ab1 is exposed to the outside, and the back surface 46ab2 abuts against the front surface 44a1 of the second plate member 44.

[0098] Figure 33 is a schematic cross-sectional view along line AA in Figure 28, showing the manner in which fixing members 41 such as plate-shaped members 42 and 44 are attached to the ceiling wall portion 12a. As shown in Figure 33, in a manner in which the positions of the through holes 44s1, 42s (see Figure 31), and 12ad (see Figures 29 and 30) coincide, the ceiling wall portion 12a is sandwiched between plate-shaped members 42 and 44 in the thickness direction of the ceiling wall portion 12a, and the central part 46aa of the outer peripheral bolt 46a penetrates and protrudes from the surface 44a1 of the plate-shaped member 44 toward the surface 42a1 of the main plate portion 42a of the plate-shaped member 42, engaging with the through holes 44s1 and 42s, and the protruding portion is fixed by the outer peripheral nut 46d. The protruding portion of the outer peripheral bolt 46a and the outer peripheral nut 46d are flush.

[0099] The height h42 of the side plate portions 42b and 42c is smaller than the thickness w1 of the ceiling wall portion 12a. This ensures that when the ceiling wall portion 12a is sandwiched between the plate-shaped member 42 and the plate-shaped member 44 and fixed with the outer bolt 46a and outer nut 46d, the plate-shaped member 42 and the plate-shaped member 44 do not come into contact with each other. Specifically, the side plate portions 42b and 42c do not come into contact with the plate-shaped member 44.

[0100] The back surface 42a2 of the rectangular main plate portion 42a of the plate-shaped member 42 is in contact with the inner surface 12as2 (see Figure 30) of the ceiling base portion 12as of the ceiling wall portion 12a. The back surface 42b2 (see Figure 31) of the side plate portion 42b is in contact with the inclined surface 12d1 (see Figure 30) of the groove portion 12d, and the back surface 42c2 (see Figure 31) of the side plate portion 42c is in contact with the inclined surface 12e1 (see Figure 30) of the groove portion 12e. In other words, the side plate portions 42b and 42c of the plate-shaped member 42 sandwich the ceiling base portion 12as in the width direction. This prevents the plate-shaped member 42 from rotating inside the main body 100 when the line box 1 is attached to the ceiling structure 300 or after it has been attached. Prevention of rotation here means preventing the plate-shaped member 42 from rotating in the direction of arrow X11 in Figure 28 while in contact with the ceiling base portion 12as.

[0101] Furthermore, the plate-like members 42 and 44 sandwich the ceiling wall portion 12a from above and below (in the directions of arrows Z11 and Z12). As a result, the plate-like members 42 and 44, and the ceiling wall portion 12a formed of an elastic material, flex slightly, reinforcing the fixing by the outer bolts 46a and outer nuts 46d. Specifically, when the ceiling wall portion 12a is fixed by sandwiching it from above and below (in the directions of arrows Z11 and Z12) with the plate-like members 42 and 44, the inner surface 12as2 (see Figure 30) of the ceiling wall portion 12a in contact with the plate-like member 42 and the plate-like member 42 flex slightly in the direction indicated by arrow Z12, and the outer surface 12as1 (see Figure 30) of the ceiling wall portion 12a in contact with the plate-like member 44 and the plate-like member 44 flex slightly in the direction indicated by arrow Z11. Due to the elastic recovery force generated by this slight deflection, a force acts on the enlarged diameter portion 46ab of the outer bolt 46a in the direction of arrow Z12, and a force acts on the outer nut 46d in the direction of arrow Z11. In other words, a force acts in the opposite direction to the tightening force exerted by the outer bolt 46a and the outer nut 46d. This prevents the outer nut 46d from loosening, and as a result, prevents it from coming off.

[0102] From the state shown in Figure 33, the front wall portion 12b folds in the direction of arrow Y11 and the rear wall portion 12c folds in the direction of arrow Y12 relative to the ceiling wall portion 12a. As a result, as shown in Figures 34 and 35, the sloped surface 12d2 on the front wall portion 12b side comes into contact with the surface 42b1 of the side plate portion 42b of the plate-like member 42, and the sloped surface 12e2 on the rear wall portion 12c side comes into contact with the surface 42c1 of the side plate portion 42c of the plate-like member 42.

[0103] Next, as shown in Figures 36 and 37, the shaft bolt 46b is inserted into the through hole 46as of the outer circumference bolt 46a and positioned and fixed by the shaft bolt nut 46c.

[0104] Next, as shown in Figure 38, paint 90 is applied to the portion of the shaft bolt 46b exposed from the shaft bolt nut 46c, the shaft bolt nut 46c, and the outer nut 46d. The paint 90 is a substance containing a resin component, such as lacquer.

[0105] As shown in Figure 39, when the line box 1 is assembled, the corner frame member 30 is in contact with the surface 44a1 of the plate-shaped member 44. When the line box 1 is installed on the ceiling structure 300, it is positioned upside down compared to its assembled state.

[0106] As shown in Figures 39 and 40, the line box 1 is fixed to the ceiling structure 300 by the engagement of the mounting member 202, which is fixed to the ceiling structure 300, with the shaft bolt 46b. The mounting member 202 is a cylindrical member, and its inner circumferential surface has threads formed to engage with the threads of the shaft bolt 46.

[0107] Line box 1 is characterized by the relatively high thermal conductivity of metal components being blocked by the relatively very low thermal conductivity of resin components. The thermal conductivity of metal (galvanized steel sheet) is, for example, 45 W / m·k (watts per meter per Kelvin). In contrast, the thermal conductivity of resin is, for example, 0.2 W / m·k (watts per meter per Kelvin). As shown in Figure 41, when there is a difference between Temp.A, the external temperature of line box 1, and Temp.B, the internal temperature, heat is conducted through the metal shaft bolt 46b, as indicated by arrow T1. However, the resin outer periphery bolt 46a prevents the conduction of Temp.A to the plate-shaped member 42 and the conduction of Temp.B to the plate-shaped member 44. Furthermore, since the portion of the shaft bolt 46b exposed from the shaft bolt nut 46c, the shaft bolt nut 46c, and the outer periphery nut 46d are coated with a resin-containing paint 90, these parts are not exposed to the inside of the box 10, and condensation does not occur.

[0108] Now, let's return to the explanation of the overall assembly process of line box 1. Once line box 1 is assembled to the state shown in Figure 28, the supply port 40 is inserted from below (outside) into the ceiling opening 12aa (see Figure 27) of the ceiling wall section 12a, as shown in Figure 42. The tip 40aa (see Figure 11) of the cylindrical body 40a of the supply port 40 is inserted from the outside to the inside of the ceiling wall section 12a, and is fixed in a state where the wing portion 40b abuts against the outer surface of the ceiling wall section 12a. At this time, the tip 40aa is at the same height as the ceiling base 12as in the thickness direction of the ceiling wall section 12a. In other words, the tip 40aa is flush with the ceiling base 12as without any steps.

[0109] Next, as shown in Figures 43 and 44, the partition plate 16 is temporarily fixed to the groove 12ab of the ceiling wall 12a.

[0110] Next, as shown in Figure 45, the plate-shaped member 70 is temporarily fixed to the notch 12ba of the front wall portion 12b.

[0111] Next, as shown in Figures 46 and 47, the front wall section 12b and the rear wall section 12b are folded at a right angle to the ceiling wall section 12a. As a result, the partition plate 16 is fixed in place, fitting into the grooves 12ab of the ceiling wall section 12a, the grooves 12bb of the front wall section 12b, and the grooves 12cb of the rear wall section 12c. The plate-shaped member 70 is also fixed in place, fitting into the notches 12ba of the front wall section 12b and the notches 12ca of the rear wall section 12c.

[0112] Next, as shown in Figure 48, the side wall portions 18A and 18B are positioned at both ends in the longitudinal direction of the ceiling wall portion 12a, the front wall portion 12b, and the rear wall portion 12c, in a configuration where the surface 18a (nonwoven fabric layer 17a) side is on the inside of the main body 10. The outer periphery 12ac of the ceiling wall portion 12a and the side surface 12af of the ceiling base portion 12as, the outer periphery 12bc of the front wall portion 12b and the side surface 12bf of the front wall base portion 12bs, and the outer periphery 12cc of the rear wall portion 12c and the side surface 12cf of the rear wall base portion 12cs are in contact with and positioned against the bottom surface 18c and side surfaces 18d and 18e (see Figure 10) of the side wall portions 18A and 18B. The state in Figure 48 is called the box body 10A.

[0113] Next, as shown in Figure 49, the end frame members 32A and 32B are placed over both ends of the box body 10A shown in Figure 48. The state in Figure 49 is referred to as the box body 10B. As shown in Figure 49, the top of the box body 10 is open, forming a connection opening 12s with a width w12 and a length L12.

[0114] Next, as shown in Figures 50 to 53, the front plate sections 50A and 50B that constitute the discharge section 50 are assembled.

[0115] As shown in Figure 50, the second plate member 54 of the front plate portion 50A has the rectangular portion 54b bent at a right angle toward the back of the paper relative to the main portion 54a along the boundary line 54L between the main portion 54a and the rectangular portion 54b. In an embodiment where the lower end 54aa of the main portion 54a overlaps with the lower end 52b of the first plate member 52, the main portion 54a of the second plate member 54 is fixed to the back side of the first plate member 52 (see Figure 51). For example, the first plate member 52 and the second plate member 54 are spot welded at multiple positions 52p of the first plate member 52 and multiple positions 54p of the second plate member 54.

[0116] Similarly, as shown in Figure 52, the fourth plate member 58 of the rear plate portion 50B is bent at a right angle toward the front of the paper relative to the main portion 58a, along the boundary line 58L between the main portion 58a and the rectangular portion 58b. In an embodiment where the lower end 58aa of the main portion 58a overlaps with the lower end 56b of the third plate member 56, the main portion 58a of the fourth plate member 58 is fixed to the front of the paper side of the third plate member 56 (see Figure 53). For example, the third plate member 56 and the fourth plate member 58 are spot-welded at multiple positions 56p of the third plate member 56 and multiple positions 58p of the fourth plate member 58.

[0117] Next, as shown in Figures 54 and 55, the front plate section 50A, the rear plate section 50B, and the side plate sections 60A and 60B are connected to form the discharge section 50. The side plate section 60A is fixed to the front plate section 50A and the rear plate section 50B with the side sections 60b and 60c of the side plate section 60A in contact with one end of the front plate section 50A and the rear plate section 50B from the outside. For the side plate section 60A, multiple positions 60q of the side section 60c are spot welded to multiple positions 52p of the front plate section 50A, and multiple positions 60p of the side section 60b are spot welded to multiple positions 56q of the rear plate section 50B. Similarly, for the side plate section 60B, multiple positions 60p of the side section 60b are spot welded to multiple positions 52p of the front plate section 50A, and multiple positions 60q of the side section 60c are spot welded to multiple positions 56q of the rear plate section 50B.

[0118] As shown in Figure 55, the side portions 60b and 60c of the side plate portions 60A and 60B are located above the rectangular portions 54b and 58b. The width of the discharge portion 50 is w50, which is substantially the same as the width w12 (see Figure 49) between the front wall portion 12b and the rear wall portion 12c of the box body 10B. The length of the discharge portion 50 is L50, which is substantially the same as the length width L12 (see Figure 49) between the side wall portions 18A and 18B of the box body 10B. In other words, the width w50 of the discharge portion 50 is the same as the width w12 of the connection opening 12s, and the length L50 of the discharge portion 50 is the same as the length L12 of the connection opening 12s.

[0119] Next, as shown in Figures 56 and 57, the discharge section 50 is attached to the box body 10B. The discharge section 50 is inserted into the box body 10B through the connection opening 12s until the rectangular sections 54b and 58b of the discharge section 50 are in contact. At this point, the rectangular section 54b is in contact with the side surface 12bg of the front wall section 12b, and the rectangular section 58b is in contact with the side surface 12cg of the rear wall section 12c. This state is called the box body 10C (see Figure 57).

[0120] Next, four square frame members 30 are fixed to the box body 10C in Figure 57 to form the box body 10D (see Figure 58). Specifically, the square frame members 30 are fixed to the end frame members 32A and 32B with screws. In Figure 58, the two lower square frame members 30 are also connected to the plate-like members 44. Specifically, the plate-like members 44 and the square frame members 30 are connected by screws that engage with both the through-holes 44s2 of the plate-like members 44 (see Figure 31) and the screw holes (not shown) of the square frame members 30.

[0121] Next, the U-shaped member 34 is connected to the box body 10D (see Figure 59). As described above, the U-shaped member 34 is formed of a rectangular base 34a having a longitudinal direction in plan view, and upright parts 34b and 34c that are formed by bending perpendicularly from both ends of the base 34a (see Figure 20). As shown in Figure 59, the base 34a of the U-shaped member 34 connects the two lower corner frame members 30 in Figure 59. The upright parts 34b and 34c of the U-shaped member 34 connect the two lower corner frame members 30 and the two upper corner frame members. The U-shaped member 34 and the four corner frame members 30 are fixed with screws. In this embodiment, one U-shaped member 34 is provided, but there is no limit to the number; for example, there may be two or three or more.

[0122] Subsequently, adhesive is used to connect each component as needed, and then the sheet 36 is fixed to the outer periphery of the discharge section 50 of the box body 10D, completing the line box 1 (see Figure 60). The adhesive is, for example, vinyl acetate resin emulsion wood bond. Also, a sealant is applied between each component as needed. The sealant is, for example, a nitrile rubber duct sealer.

[0123] Figure 61 is a schematic cross-sectional view of line box 1 in Figure 60, along line BB. Specifically, it is a schematic cross-sectional view of the portion including the supply port 40 and the plate-shaped member 70. In the explanation referring to Figure 61, "upper end" or "lower end" refers to the top and bottom on the plane of Figure 61. Since Figure 61 is a schematic cross-sectional view, notations for screws, adhesives, etc., are omitted.

[0124] As shown in Figure 61, the supply port 40 has its blade portion 40b in contact with the inner circumferential surface of the ceiling opening 12aa of the ceiling wall portion 12a and the outer surface of the ceiling wall portion 12a. The blade portion 40b is fixed to the ceiling wall portion 12a by contacting the two lower corner frame members 30.

[0125] The plate-shaped member 70 is fixed by being sandwiched between the front wall portion 12b and the rear wall portion 12c, while engaging with the notch 12ba in the front wall portion 12b and the notch 12ca in the rear wall portion 12c.

[0126] The discharge section 50 has a rectangular section 54b that contacts the inner surface and side surface of the front wall section 12b, and a rectangular section 58b that contacts the inner surface and side surface of the rear wall section 12c. The discharge section 50 is fixed to the main body 10 by the rectangular sections 54b and 58b being fixed to the front wall section 12b and the rear wall section 12c, respectively, by the frame members 30.

[0127] <Effects of Line Box 1> The operation and effect of the line box 1 will be explained with reference to Figures 62 to 68. As shown in Figure 62, the line box 1 is placed in an opening 200 formed in the ceiling of Room C. The line box 1 is placed in Room C in an inverted state compared to the state shown in Figure 60 during the manufacturing process. When conditioned air Air 1 is supplied to the supply port 40 of the line box 1, the conditioned air Air 1 expands its flow range along the longitudinal direction of the line box 1, and becomes exhaust air Air 2, which is supplied to the room M. This will be explained in detail below.

[0128] As shown in Figure 63, inside the main body 10 of the line box 1, the conditioned air Air 1 supplied from the supply port 40 is configured to hit the plate-shaped member 70. Conversely, the plate-shaped member 70 is configured in the line box 1 to be positioned, shaped, and sized so that all of the conditioned air Air 1 hits it.

[0129] As shown in Figure 64, a portion of the conditioned air Air1 that hits the plate-shaped member 70 passes through the through-hole 70b of the plate-shaped member 70. When the other portion of the conditioned air Air1 hits the base 70a, it changes direction and flows towards the ends in the longitudinal direction where the air pressure is lower, and further changes direction towards the exhaust port 50 and Room M where the air pressure is lower. This mitigates the tendency for the conditioned air Air1 to be concentrated and discharged in the vertical direction of the supply port 40, and the airflow rate of the discharged air is made uniform in the longitudinal direction of the opening 200.

[0130] The behavior of the conditioned air Air1 upon reaching the plate-shaped member 70 will be described in detail below. As shown in Figure 65, when Air11a, which is a part of the conditioned air Air1, reaches the plate-shaped member 70, it passes through the through-hole 70b. When the other part, Air11b, reaches the plate-shaped member 70, it hits the base portion 70a where the through-hole 70b is not formed, and the airflow vector becomes Air11b1 (hereinafter referred to as "reflected airflow Air11b1") which has a longitudinal directional component. The reason why the reflected airflow Air11b1 is directed toward both ends in the longitudinal direction is that, in the unit space S1 and S2, the air pressure at both ends in the longitudinal direction is relatively lower than the air pressure at the center.

[0131] As shown in Figure 66, the reflected airflow Air 11b1 moves above the plate-shaped member 70, and therefore acts as an external force on and affects the conditioned air Air 1 before it reaches the plate-shaped member 70. As a result, whether the conditioned air Air 1 is Air 11a passing through the through-hole 70b or Air 11b hitting the base 70a, the airflow vector is not linear, but is influenced by the reflected airflow Air 11b1, changes direction, and reaches the plate-shaped member 70 while having a longitudinal directional component.

[0132] Specifically, as shown in Figure 66, if we consider two regions above the plate-shaped member 70, AS1 close to the supply port 40 and AS2 close to the plate-shaped member 70, in region AS1, the conditioned air Air1 is not affected by the reflected airflow Air11b1, or if affected, it is only slightly. In contrast, in region AS2, the conditioned air Air1 is greatly affected by the reflected airflow Air11b1. Therefore, even though Air11a passes through the through-hole 70b, the direction in which it passes through the through-hole 70b is not uniform, and it is discharged as airflow Air11a1 with various directional components. As a result, although the airflow discharged from the outlet 200 as a whole is directed downward, if we focus on that part, it is composed of airflow containing vector components in various directions, so the airflow in the longitudinal direction of the outlet 200 is made even more uniform.

[0133] Region AS1 has the function of ensuring that the conditioned air 1 reliably hits the plate-shaped member 70 while maintaining a downward flow velocity by not applying an external force perpendicular to the flow direction of the incoming conditioned air 1. Region AS2 has the function of influencing the flow direction of the conditioned air 1 with the reflected airflow Air 11b1 and working in cooperation with the plate-shaped member 70 to disperse the conditioned air 1 in the longitudinal direction of the main body 10 (unit spaces S1 and S2). For this reason, the distance from the tip 40aa of the supply port 40 to the plate-shaped member 70 is defined as a distance at which regions AS1 and AS2 can be present.

[0134] Here, we will explain that even if the opening ratio of the plate-shaped member 70 is between 5 / 10 and 8 / 10, the exhaust air does not concentrate in the direction directly below the supply port 40 in the unit regions S1 and S2, and the exhausted air can be made uniform in the longitudinal direction of the exhaust port 50. First, the opening ratio of the plate-shaped member 70 is not the same as the ratio of the conditioned air Air1 passing through the through hole 70b (hereinafter referred to as the "penetration ratio"), but rather becomes smaller. Figure 67 is a conceptual diagram showing the angle of the airflow and the through hole 70. Air11a1 and Air11a2 shown in Figure 67 are airflows with the same diameter as the diameter of the through hole 70. Since Air11a1 strikes the plate-shaped member 70 in a vertical direction, all of it passes through the through hole 70b. In contrast, since Air 11a2 strikes the plate-shaped member at an angle that is not perpendicular, only a portion of the airflow, wAir2, passes through the through-hole 70b, while another portion wAir3 strikes the base 70a. Thus, when the conditioned air Air 1 does not strike the plate-shaped member 70 from a perpendicular direction, the penetration ratio becomes smaller than the opening ratio of the plate-shaped member 70. Furthermore, the fact that air is a fluid with a predetermined viscosity also contributes to the smaller penetration ratio.

[0135] As shown in Figure 68, the airflow Air 11b that strikes the base 70a of the plate-shaped member 70 is directed toward both ends in the longitudinal direction of the unit space S1 and toward the discharge port 50. This is because the air pressure is lower at both ends in the longitudinal direction than at the center, and the air pressure is lower in the direction of the discharge port 50 than above where the supply port 40 is located. Therefore, once the airflow Air 11b leaves the area where the plate-shaped member 70 is located, it changes direction downward at various positions toward both ends and is discharged. This equalizes the airflow in the longitudinal direction of the discharge port 200.

[0136] The shape and size of the plate-shaped member 70 and its position on the main body 10 are specified so that the plate-shaped member 70 acts on the conditioned air Air 1 as described above, and the airflow in the longitudinal direction of the discharge section 50 is made uniform.

[0137] <Second Embodiment> Referring to Figures 69 and 70, the differences between the second embodiment and the first embodiment described above will be explained. As shown in Figure 69, the fixing member 41A of the second embodiment includes a washer member 46e. The washer member 46e is formed by molding resin. The outer shape of the washer member 46e is a flattened cylindrical shape, and a through hole is formed in the center.

[0138] As shown in Figure 70, the through hole of the washer member 46e engages with the outer circumferential bolt 46a, and the washer member 46e is positioned between the plate-shaped member 42 and the outer circumferential nut 46d. This prevents heat from being conducted from the shaft bolt 46b to the outer circumferential nut 46d via the shaft bolt nut 46c, as the washer member 46e prevents heat from being conducted to the plate-shaped member 42. Furthermore, the washer member 46e further prevents loosening of the shaft bolt nut 46c and the outer circumferential nut 46d. In contrast to this embodiment, heat conduction can also be prevented by applying a resin-containing substance (e.g., lacquer) to the portion of the surface 42a1 of the plate-shaped member 42 that contacts the outer circumferential nut 46d, and / or the portion of the outer circumferential nut 46d that contacts the surface 42a1 of the plate-shaped member 42, instead of the washer member 46e.

[0139] <Modification 1 of the second embodiment> Referring to Figure 71, the differences between Modification 1 of the second embodiment and the second embodiment described above will be explained. As shown in Figure 71, in Modification 1 of the second embodiment, the washer member 46e is positioned between the outer nut 46d and the shaft bolt nut 46c. This prevents heat conduction from the outer nut 46d when heat is conducted from the shaft bolt 46b to the shaft bolt nut 46c. As a result, heat conduction from the shaft bolt 46b to the plate-shaped member 42 can be prevented.

[0140] <Modified example 2 of the second embodiment> Referring to Figure 72, the differences between the second embodiment and the second embodiment described above will be explained for Modification 2 of the second embodiment. As shown in Figure 72, in Modification 2 of the second embodiment, two washer members 46e are used. One washer member 46e is placed between the plate-shaped member 42 and the outer nut 46d. The other washer member 46e is placed between the outer nut 46d and the shaft bolt nut 46c. This more reliably prevents heat conduction from the shaft bolt 46b to the plate-shaped member 42.

[0141] <Third Embodiment> Referring to Figure 73, the differences between the third embodiment and the first embodiment described above will be explained. As shown in Figure 73, the fixing member 41B of the third embodiment includes a plate-shaped member 42B. The plate-shaped member 42B has bent portions 42d and 42e formed from both ends along the longitudinal direction of the main plate portion 42a, which are bent in the opposite direction to the bending direction of the side plate portions 42b and 42c. This increases the mechanical strength of the plate-shaped member 42B.

[0142] <Fourth Embodiment> Referring to Figures 74 to 77, the differences between the fourth embodiment and the first embodiment described above will be explained.

[0143] As shown in Figure 74, the main member 12A of the fourth embodiment is composed of a ceiling wall portion 12aA, a front wall portion 12bA, a rear wall portion 12cA, and side plate portions 18AA and 18BA. Unlike the ceiling wall portion 12a of the first embodiment, the width of the ceiling wall portion 12aA is greater than the height of the front wall portion 12bA and the rear wall portion 12cA.

[0144] As shown in Figure 75, in the fourth embodiment, the main body 10A is composed of a ceiling wall portion 12aA, a front wall portion 12bA, a rear wall portion 12cA, and side plate portions 18AA and 18BA.

[0145] As shown in Figure 76, the fixing member 41C of the fourth embodiment includes a plate-shaped member 42C. The plate-shaped member 42C has downwardly bent side plate portions 42f and 42g formed at both ends in the longitudinal direction of the main plate portion 42a. The side plate portions 42f and 42g are bent at a 90-degree angle toward the ceiling wall portion 12a.

[0146] Furthermore, bent portions 42d and 42e are formed from both ends of the main plate portion 42a along its longitudinal direction, bending in the opposite direction to the side plate portions 42 and 42c. This increases the mechanical strength of the plate-like member 42C.

[0147] As shown in Figure 77, the main plate portion 42a of the plate-shaped member 42C abuts against the surface of the ceiling wall portion 12aA, and the side plate portions 42g and 42f abut against the side surfaces of the ceiling wall portion 12aA. In this state, the front wall portion 12bA and the rear wall portion 12cA are connected to the ceiling wall portion 12aA.

[0148] Furthermore, the line box of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. In addition, each of the above embodiments can be combined as appropriate, as long as it does not create a technical inconsistency. [Explanation of Symbols]

[0149] 1 line box 10 Main Unit 12 Main components 12a Ceiling and wall section 12aa ceiling opening 12b Front wall 12c Rear wall 16 partition plates 17 Microduct Board 18 Side wall section 30 Square frame member 32 End frame member 34 U-shaped member 40 supply ports 41 Fixing components 42,44 Plate-shaped member 46a Outer perimeter bolts 46b Shaft bolt 46c nut for shaft bolt 46d Outer Nut 50 Discharge section 50A front plate part 50B Rear plate part 70 Plate-shaped member 202 Duct 300 Ceiling structure

Claims

1. A line box mounting structure comprising a hollow box-shaped line box body and a cylindrical discharge section connected to the line box body for discharging conditioned air supplied from the line box body, The line box body is, In a plan view, it is configured to have a shape substantially similar to the discharge section, It has a ceiling wall section, a front wall section and a rear wall section arranged parallel to each other, and a pair of side wall sections that close off both ends in the longitudinal direction, The line box is configured to be fixed to the ceiling structure of the building by fixing members arranged on the ceiling wall, The aforementioned fixing member is, A first plate member and a second plate member are metal plate-shaped members having a longitudinal direction in a plan view and having through holes formed therein. In an embodiment in which the longitudinal directions of the first plate member and the second plate member are perpendicular to the longitudinal direction of the ceiling wall, the ceiling wall is formed by the first plate member and the second plate member With the first plate member and the second plate member sandwiched from above and below, a resin outer bolt is formed in a cylindrical shape with an enlarged diameter portion at its end and engages with the through holes of the first plate member and the second plate member. A metal outer nut for fixing the first plate member, the ceiling wall, and the second plate member by engaging with the outer periphery bolt inside the line box body, A metal shaft bolt that engages with a bolt through-hole, which is a through-hole of the outer peripheral bolt, and is fixed to the ceiling structure, The line box body includes a metal shaft nut that engages with the shaft bolt inside the line box body and secures the shaft bolt and the outer periphery bolt, The second plate member is located on the outside of the line box body, and the enlarged diameter portion of the outer periphery bolt contacts the second plate member, thereby positioning the outer periphery bolt and the second plate member. The first plate member is located inside the line box body and has a main plate portion and two side plate portions that are bent from both ends of the main plate portion in the longitudinal direction in the direction in which the ceiling wall portion is located. With the two side plate portions of the first plate member in contact with both sides of the ceiling wall portion in the short direction, the first plate member, the ceiling wall portion, and the second plate member are fixed together. The first plate member and the second plate member do not come into direct contact. Line box mounting structure.

2. The mounting structure for a line box according to claim 1, wherein the angle at which the side plate portion of the first plate member bends from both ends of the main plate portion is any angle in the range of 30 degrees to 90 degrees.

3. The fixing member further includes a resin washer member positioned between the outer periphery nut and the first plate member and / or between the outer periphery nut and the shaft nut, with a through hole formed in its center. The mounting structure for the line box according to claim 1.

4. In the aforementioned shaft bolt, the aforementioned outer nut, and the aforementioned shaft nut, the portion exposed inside the line box body is coated with a substance containing resin. The mounting structure for the line box according to claim 1.

5. The mounting structure for a line box according to claim 1, wherein both ends of the main plate portion of the first plate member, along the longitudinal direction, have bent portions formed that are bent in the opposite direction to the side plate portion.

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