JP6921570B2 - Underfloor air conditioning structure - Google Patents

Description

The present invention relates to an underfloor air conditioning structure that supplies conditioned air to an underfloor space to air-condition a room.

Conventionally, there is known an air-conditioning method in which air-conditioned air is sent under the floor by a duct or the like arranged under the floor to air-condition the room through the floor surface or the like.

For example, the floor panel integrated duct member described in Patent Document 1 includes a floor panel having a hole for blowing cold air, a lower panel, and a plurality of support members as the duct member, and an air flow between the two panels. A duct is formed by forming a flow path, further providing a side panel or the like that closes a surface other than the flow path, and arranging the duct body or the like in the airflow route to form a duct. It is a structure that is arranged on a gantry structure composed of parts and the like, and the duct member is placed on the gantry frame.

In the air-conditioning equipment such as the outlet distributed type of Patent Document 2, the blowout floor unit and the blind floor material unit are laid floating by a support rod, and the harmonized air is sent by using a flexible duct or the block duct is supported by the support rod. It floats and connects with air to supply air, and the blowout floor units arranged at the required locations are connected to form an air passage.

In the hot air floor heating device described in Patent Document 3, a joist is provided on a support base arranged on the foundation, a floor plate is attached, and a metal is provided in a hot air passage formed between the joist and the heat insulating layer on the foundation. It is configured by piping a ventilation duct in which a plate is formed in a square cylinder shape.
Further, in the floor air-conditioning structure of Patent Document 4, a leg hole portion through which the leg portion of the floor member is inserted is provided in the bottom plate portion of the floor duct material, and a space portion is formed between the bottom plate portion and the floor foundation surface. The floor duct material is arranged, the legs of the floor member are arranged by inserting the leg holes of the floor duct material, and conditioned air is introduced into the floor duct material to perform air conditioning.

JP-A-2010-133637 Jikkenhei 3-107652 Gazette Japanese Unexamined Patent Publication No. 2001-304594 Japanese Patent No. 5981168

By the way, the duct member according to Patent Document 1 is mounted on a frame of an adjacent frame structure, and in the air conditioning equipment of Patent Document 2, the flexible duct bypasses the support rod and blocks. The duct itself is supported by a support rod, and Patent Document 3 also has a configuration in which the ventilation duct is arranged in the warm air passage between the support bases, and in each case, the ducts are avoided from the legs, the support bases, and the like. Since the structure is arranged, there is a problem that the arrangement form of the duct is restricted.

Further, Patent Document 4 has a structure in which the legs of the floor member are inserted into the floor duct material, but since the relationship between the leg holes of the floor duct material and the legs of the floor member is specified, the floor member can be used. On the other hand, there is a problem that the floor duct material cannot be arranged freely.

The present invention has been made to solve the above problems, and the layout of the duct as an air-conditioned air flow passage can be freely set regardless of the arrangement of the support legs of the floor material, and the size of the duct is also free. The challenge is to provide an underfloor air-conditioning structure that has a high degree of freedom and is also excellent in workability and economy.

In order to solve the above technical problems, the underfloor air-conditioning structure according to the present invention has a plurality of first units erected on the foundation portion and provided with the floor material mounting portion 30 at the upper end portion as shown in FIG. One support leg 8, a floor material 4 mounted on the floor material mounting portion 30 of the first support leg 8, and left and right side plate materials 14, 14 and arranged under the floor material 4. It has a first duct 6 which is composed of an upper plate material 16 provided between the upper portions of the plate materials on both sides and forms a flow path for conditioned air for performing underfloor air conditioning, and the arrangement position of the first duct 6 is When it overlaps with a part of the first support legs 8, the first support legs 8 of the part are arranged inside the first duct 6, and the first support legs 8 of the part are arranged. The floor material mounting portion 30 is configured to simultaneously mount and support the upper plate material 16 of the first duct 6 and the floor material 4 arranged above the upper plate material 16.
Here, the upper plate material and the side plate material of the first duct have an integral or separate shape.

Further, the underfloor air-conditioning structure according to the present invention has a configuration in which the upper plate member 16 of the first duct 6 is formed in an arc shape having a cross section protruding upward.
The underfloor air-conditioning structure according to the present invention has a configuration in which the corresponding portion of the upper plate material mounted on the floor material mounting portion of the first support leg is fixed to the floor material mounting portion.

As shown in FIG. 5 and the like, the underfloor air-conditioning structure according to the present invention includes a plurality of second support legs 78 which are erected on a foundation portion and have a floor material mounting portion 94 at the upper end portion, and the second support leg 78 described above. From the floor material 74 placed on the floor material mounting portion 94 of the support leg 78, and the upper plate material 86 arranged below the floor material 74 and provided between the left and right side plate materials 84 and the upper portions of these both side plate materials. Therefore, it has a second duct 76 that forms a flow path for conditioned air for performing underfloor air conditioning, and the arrangement position of the second duct 76 overlaps with a part of the second support legs 78. Is provided with an upper plate mounting portion 92 on the lower side of the floor material mounting portion 94 of the second support leg 78, and the second support leg 78 of the part is provided with the second duct 76. The floor material mounting portion 94 of the second support leg 78 is projected from the insertion hole portion 87 provided in the upper plate material 86 of the second duct 76, and the floor material is mounted on the floor material. The floor material 74 is placed and supported on the placing portion 94, while the peripheral portion of the insertion hole portion 87 is held by the upper plate mounting portion 92.
Here, the upper plate material and the side plate material of the second duct have an integral or separate shape.

Further, the underfloor air-conditioning structure according to the present invention has a configuration in which the upper portion of the both side plate materials and the upper plate material are joined to the both side plate materials so as to be removable or openable.
The underfloor air-conditioning structure according to the present invention has a structure in which the upper part of the both side plate materials and the joint portions of both side ends of the upper plate material are joined by splicing.

In the underfloor air-conditioning structure according to the present invention, a jet device 10 having a jet nozzle portion 44 attached to an upper portion of a leg portion is arranged on the foundation portion, and the jet flow is performed by using a communication member 54 that communicates with the air-conditioning air flow passage. The conditioned air is made to flow into the nozzle portion 44, and the conditioned air is blown out from the jet nozzle portion 44 toward the floor material or below the floor.

The underfloor air-conditioning structure according to the present invention has a configuration in which a floor material mounting portion is provided at the upper end of a leg portion of the flooring device 10 and the floor material is supported by the floor material mounting portion.
The underfloor air-conditioning structure according to the present invention has a configuration in which a lower plate material is provided between the lower portions of the left and right side plate materials. Here, the lower plate material has a shape integrated with the left and right side plate materials (a U-shaped cross section with an open upper portion) or a separate shape.

According to the underfloor air-conditioning structure according to the present invention, there is a first duct composed of a first support leg, a floor material, left and right side plate materials, and an upper plate material, and the arrangement position of the first duct is a part of the first. When it overlaps with the support leg of, the first support leg is placed inside the first duct, and the upper plate material and floor material of the first duct are supported by the first support leg at the same time. , Regardless of the standing position of the first support leg, the arrangement position of the first duct can be freely set as the flow passage of the conditioned air, the layout of the flow passage can be freely designed, and in addition, the first Regardless of the position of the support legs and the floor height, the size of the first duct as a flow passage that matches the desired air volume can be freely set, and it is highly versatile and the installation of each member is free. Moreover, it is easy, has excellent workability, and is economical.

According to the underfloor air-conditioning structure according to the present invention, since the upper plate material of the first duct is formed in an arc shape having a cross section protruding upward, it follows the displacement of the floor material and suppresses vibration. It also has the effect of obtaining cushioning properties.

According to the underfloor air-conditioning structure according to the present invention, there is a second duct composed of a second support leg, a floor material, left and right side plate materials, and an upper plate material, and the arrangement position of the second duct is the second support leg. In the case of overlapping with, the second support leg is arranged inside the second duct, protrudes from the insertion hole provided in the upper plate material, the floor material is supported by the second support leg, and the lower side thereof. Since the structure that holds the upper plate material is adopted, the placement position of the second duct can be freely set as the flow passage of the conditioned air regardless of the standing position of the second support leg, and the layout of the flow passage. Can be freely designed, and in addition, the size of the second duct as a flow passage suitable for the desired air volume can be freely set regardless of the position of the second support leg and the floor height, etc. It is highly easy to install, and each member is free and easy to install, has excellent workability, and is economical.

According to the underfloor air-conditioning structure according to the present invention, the upper plate material is joined to both side plate materials so as to be removable or openable, and the joint portion between the upper part of both side plate materials and both side ends of the upper plate material is separated. Since they are joined by splicing, there is an effect that the upper plate material can be easily and effectively attached and the workability is excellent.

It is a figure which shows the underfloor air-conditioning structure which concerns on 1st Embodiment of this invention. It is a figure which shows the 1st support leg which concerns on 1st Embodiment. It is a figure which shows the arrangement form of the jet device which concerns on embodiment. It is a figure which shows the assembly state of the 1st duct which concerns on 1st Embodiment. It is a figure which shows the underfloor air-conditioning structure which concerns on the 2nd Embodiment of this invention. It is a figure which shows the 2nd support leg which concerns on 2nd Embodiment. It is a figure which shows the assembled state of the 2nd duct which concerns on 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an underfloor air conditioning structure according to the first embodiment.
This underfloor air-conditioning structure supports a floor material 4 that forms a floor surface above the foundation of a building, a first duct 6 that is arranged on the foundation and forms an air-conditioning air flow path, a floor material 4, and the like. It has one support leg 8 and the like. Further, a jet device 10 described later is connected to the first duct 6, and underfloor air conditioning is performed.

The floor material 4 is mainly a rectangular sheet panel (particle board, etc.), a waste material (plywood, etc.), and a wood, wood material, or a metal material (steel material, aluminum, etc.) such as a finishing material (decorative flooring material, etc.). Light metals such as) are used. Here, in particular, a rectangular wood such as a particle board having a plate thickness of 20 mm and a wood flooring material 4 are used. The floor material 4 made of wood or the like is relatively flexible and has a displacement of the floor.

The first duct 6 is composed of left and right side plate members 14, 14, an upper plate member 16 arranged between the upper portions of these side plate members 14, a lower plate member 18, and the like. Each of these plate members has a rectangular shape having a predetermined dimension (for example, 50 cm to 200 cm) in the extending direction, and these are arranged and connected in a straight line or a right angle to form the first duct 6.
The widths of the upper plate member 16, the lower plate member 18, and the like can be formed in various sizes depending on the size of the flow passage required for air conditioning. The first duct 6 can be formed of a metal material, a synthetic resin material, a woven fabric, a non-woven fabric, or the like, but here, a rectangular steel plate is used by bending or molding.

The cross section of the upper plate member 16 of the first duct 6 is formed in an arc shape or a radius shape in which the central portion is bent upward in a convex shape. Further, both the side plate material 84 and the lower plate material 88 have a flat shape as a whole (other than the end portion).
The first duct 6 is arranged in such a state that the arcuate top portion of the upper plate member 16 and its vicinity thereof are in contact with the back surface portion of the floor material 4. Then, the floor material mounting portion 30 provided at the upper end of the first support leg 8 simultaneously supports the floor material 4 and the upper plate material 16 (top) of the first duct 6 in a state of being overlapped with each other.

Due to the arc shape of the upper plate member 16 of the first duct 6, the upper plate member 16 itself has a property of bending up and down (flexibility). As a result, it is possible to cope with the displacement of the floor (up / down / left / right), and the cushioning property can be ensured.
Then, depending on the height position of the upper plate material 16, a part (20 to 30%) or more of the upper plate material 16 is brought into contact with the back surface portion of the floor material 4, and both are arranged in a state of being overlapped. can do. The place where both of them overlap is a place that can be supported by the first support leg 8.
Further, since the upper plate material 16 has an arc shape, when air-conditioned air is circulated into the first duct 6, the vibration of the first duct 6 (each plate material of the duct due to the flowing air) caused by the magnitude of the air flow amount is generated. Vibration) can be suppressed.
Further, as will be described later, the vibration of each plate material of the duct due to the flowing air causes the top of the upper plate material 16 of the first duct 6 supported by the first support leg 8 to be placed on the floor material mounting portion 30. It can also be prevented by fixing with screws or the like.

Further, the height (vertical width) of each side plate member 14 of the first duct 6 is formed to be smaller than the height of the first support leg 8. That is, the plate members 14 on both sides of the first duct 6 are defined so as not to come into contact with the lower surface portion of the flooring material 4 supported by the first support legs 8. This is to prevent the lower surface portion of the flooring material 4 from hitting the upper end portion of the side plate member 14 due to the influence of the bending of the flooring material 4 and the sinking of the floor.
Further, due to the flexibility property of the upper plate material 16 in the first duct 6, the upper plate material 16 follows the displacement such as the vertical vibration of the upper floor material 4 and absorbs the vibration. Buffering properties are also obtained.

Further, the upper ends of the left and right side plate members 14 of the first duct 6 and the left and right end portions of the upper plate member 16 are joined by a seaming joint, a seaming folding caulking, or the like that mesh with each other. As the joint portion here, a joint form such as a button punch splicing 15 (or Pittsburgh splicing) is used.
In the button punch joint 15, the upper portion of the side plate member 14 is bent downward (inward), further bent upward (inward), and then folded downward (outward) to form a folded portion.
On the other hand, the upper plate member 16 is bent downward near the end portion, and the end portion is folded back inward to form a convex locking portion. The locking portion of the upper plate member 16 is locked to the folded portion of the side plate member 14. The locking portion is formed into a wedge shape with a sharp lower portion, so that the locking portion can be easily inserted.

When the upper plate material 16 is joined to the side plate material 14 by the seaming joint 15, the locking portion of the upper plate material 16 is inserted into the folded portion of the side plate material 14 while sliding, and the locking portion is inserted into the folded portion. Lock at the lower end. As a result, the locking portion of the upper plate material is caught in the folded portion of the side plate material 14, and the side plate material 14 cannot be easily removed. It should be noted that the key points of the seaming joint can be tightened by caulking to strengthen the fixing.

In the first duct 6, since the upper plate material 16 is joined to the side plate material 14 in the above-mentioned locking form, the upper plate material 16 can be removed by removing the locked state using a tool or the like. Is.
Further, in the first duct 6, the upper plate member 16 is locked to the side plate member 14 in the vertical direction, but can freely slide in the lateral direction. Then, the upper plate material 16 can be slid sideways with respect to the side plate material 14 to remove the upper plate material 16.
As described above, the upper plate member 16 of the first duct 6 is attached to the side plate member 14 so as to be removable and openable and closable in the lateral direction and the like.

The side plate member 14 and the lower plate member 18 of the first duct 6 are also joined by a seaming joint or a screw fastening that meshes with each other. In the hemming and seaming here, a joining form such as a button punch hemming and seaming (or Pittsburgh hemming) can be used.
In this case, the vicinity of the end portion of the lower plate member 18 is bent upward, and this end portion is folded back inward to form a locking portion. Then, a folded-back portion is formed in the lower portion of the side plate member 14 in the same manner as described above, and the locking portion of the lower plate member 18 is inserted and locked at this portion.
In this way, a U-shaped three-sided frame with an open upper part is formed on the upper part of the foundation part, and the upper plate material 16 is spliced on the upper parts of the plate materials 14 and 14 on both sides and connected by a caulking structure. Form the duct structure of the frame.

In this way, the upper plate members 16 can be sequentially arranged and attached from the state of the three-sided frame (lower plate material 18 and both side plate materials 14, 14), which facilitates the work of assembling the first duct 6 for construction. Good sex. Further, even when the first support leg 8 is arranged inside the first duct 6, the upper plate material is placed on the floor material mounting portion 30 while checking the installation location of the first support leg 8. The work of covering the floor material 16 and supporting the flooring material 4 can be easily performed.

Further, a form in which the lower plate material 18 is not used as the first duct 6 is also possible. In this case, a duct structure of a three-sided frame composed of both side plate members 14, 14 and an upper plate member 16 is formed on the upper part of the foundation portion.
At this time, for example, using a long metal (steel, etc.) fixture or the like having an L-shaped cross section composed of vertical pieces and horizontal pieces, the lower part of the side plate member 14 of the first duct 6 is used as the base portion. Can be fixed. At this time, the horizontal piece of the fixture is fixed to the foundation portion, while the end portion of the vertical piece is folded back inward to form a locking portion, and this locking portion is inserted into the folded portion or the like of the side plate material 14. Connect and fix the lower part of the side plate member 14.

As shown in FIG. 2, the first support leg 8 has a disk-shaped pedestal portion 26, a leg portion 28 erected on the pedestal portion 26, and a floor material mounting portion 30. The leg portion 28 includes a hollow height adjusting portion 32 and a support bolt 34 screwed into the height adjusting portion 32 so that the height can be adjusted. The floor material mounting portion 30 has a disk shape with a flat upper surface, and a nut portion 31 is integrally formed at the lower center, and a support bolt 36 in which a screw groove is engraved and a nut portion 31 are screwed together.
The pedestal portion 26 is arranged and fixed to the foundation portion of the first support leg 8, and the floor material 4 is supported by the floor material mounting portion 30. When the first support leg 8 overlaps with the first duct 6, the floor material mounting portion 30 supports the floor material 4 and holds the upper plate material 16 of the first duct 6. do.

As shown in FIG. 3, the jet device 10 includes a plate-shaped pedestal portion 40, a leg portion 42 erected in the center of the pedestal portion 40, and a jet nozzle portion 44 attached to the upper portion of the leg portion 42. Have. The leg portion 42 includes a height adjusting portion, a support bolt, and the like, and the height can be adjusted like the leg portion of the first support leg 8. Further, by attaching a member similar to the floor material mounting portion 30 of the first support leg 8 to the upper end portion of the leg portion 42, the first support leg 8 (arranged outside the first duct 6) is attached. ), The floor material 4 can also be supported, which also contributes to the reduction of the first support legs 8.
The jet nozzle portion 44 is composed of an conditioned air introduction port 46, a hollow swirl chamber 48, a jet outlet 50 for blowing out conditioned air, and the like.

Further, the first duct 6 and the jet nozzle portion 44 are connected by a communication member 54 such as a flexible duct or a bellows-shaped (flexible) hose, and conditioned air is sent to the jet nozzle portion 44. The communication member 54 has heat resistance and branches the air-conditioned air flow passage by the first duct 6 into a tributary.
A connecting plate member 56 provided with a hole for connecting to the communicating member 54 is fixed to one end of the communicating member 54, and the other end can be connected to the introduction port 46 of the jet nozzle portion 44. The side plate member 14 of the first duct 6 is provided with an air supply hole 53 for communicating with the communication member 54 at an appropriate position. The connecting plate member 56 of the communicating member 54 is attached to the portion of the air supply hole 53 of the first duct 6 by using a fastener such as a screw 57.

The height of the leg portion 42 of the jet device 10 can be adjusted, and the first support is provided by attaching a member similar to the floor material mounting portion 30 of the first support leg 8 to the upper end portion of the leg portion 42. It is also possible to support the flooring 4 as well as the legs 78, which reduces the number of parts.
The jet device 10 is effective for efficiently blowing air-conditioned air onto the floor material 4 to adjust the temperature of the floor material 4 and to air-condition the lower part of the floor (underfloor space). In addition, a plurality of ejection holes for air ejection may be provided in the upper plate member 16 or the side plate member 14 of the first duct 6, and conditioned air may be ejected from these ejection holes to perform underfloor air conditioning. It is also possible to eject conditioned air from both the jet device 10 and the ejection hole of the first duct 6.
The first duct 6 and the like are processed in advance at a factory and assembled at the site.

Here, the arrangement form of the first duct 6 and the first support leg 8 and the like will be described.
The first support legs 8 arranged at the base of the building are arranged here at the intersections of the vertical and horizontal lines orthogonal to the grid pattern.
The spacing between the vertical lines and the spacing between the horizontal lines can be equal or different. The vertical and horizontal intervals between the first support legs 8 are set to appropriate widths according to the thickness, strength, and the like of the flooring material 4.

Further, the arrangement form of the first duct 6 arranged on the foundation portion may be various, such as U-shaped, square-shaped, well-shaped, or circular-shaped, but the point is that the conditioned air is placed under the floor. The placement position is determined so as to form a flow passage for uniform distribution throughout the space.
Further, the arrangement position of the first duct 6 is determined independently of the arrangement position of the first support leg 8 without being aware of the arrangement position. Therefore, the first support leg 8 is located within the arrangement position (inside) of the first duct 6, and a portion where both are overlapped is generated.

Normally, when the width of the first duct 6 (corresponding to the width of the upper plate member 16) is larger (or equal to) the vertical and horizontal spacing between the first support legs 8, the inside of the first duct 6 There are many places where the first support leg 8 is arranged. Further, even when the width of the first duct 6 is smaller than the vertical and horizontal spacing between the first support legs 8, depending on the arrangement form of the first duct 6, the inside of the first duct 6 In some cases, the first support leg 8 is arranged.

Here, when the first support leg 8 is arranged inside the first duct 6, the upper plate member 16 of the first duct 6 is held by the first support leg 8. Therefore, the first support leg 8 holds the upper plate material 16 of the first duct 6 by the floor material mounting portion 30, and the floor material 4 is superposed on the upper plate material 16 to support the first support leg 8.
When the side plate member 14 of the first duct 6 and the first support leg 8 overlap and are arranged at the same location, the first duct 6 is arranged with a slight shift so as to avoid this.

The jet device 10 is arranged over the entire foundation in order to uniformly perform underfloor air conditioning. Then, the jet device 10 is arranged near the air supply hole 53 of the first duct 6 in order to branch the flow passage from the first duct 6 and introduce the conditioned air.
Further, when the arrangement position of the jet device 10 is close to the arrangement position of the first support leg 8, the jet device 10 is arranged at the same position, and the floor material 4 is used instead of the first support leg 8. Support is possible.

Next, the construction of the first duct 6, the first support leg 8, the floor material 4, and the like will be described.
First, an aluminum heat shield sheet 60 is laid on the foundation surface 2 of the building to form the foundation portion. The heat shield sheet 60 is a layered sheet material having an aluminum surface and a heat shield material inside.
When arranging the first support leg 8, the jet device 10, the first duct 6, and the like, these are arranged above the heat shield sheet 60 (or the lower plate member 18 of the first duct 6). The first support leg 8, the jet device 10, the first duct 6, and the like may be installed directly on the upper part of the foundation surface. In this case, the corresponding portion of the heat shield sheet 60 and the first duct 6 may be installed. Cut out the relevant portion of the lower plate material 18 and the like.

Then, a plurality of first support legs 8 are arranged on the heat shield sheet 60 or the foundation surface as the foundation portion. Here, the first support legs 8 are arranged at the intersecting positions of the vertical and horizontal lines orthogonal to the grid pattern, and the pedestal portion 26 is fixed by using screws or the like.
The jet device 10 is also arranged and fixed in the same manner as the first support leg 8. At this time, when the arrangement position of the jet device 10 is close to the arrangement position of the first support leg 8, the jet device 10 is arranged in place of the first support leg 8, and the floor material is used in the jet device 10. 4 can also be supported.

The vertical and horizontal intervals between the first support legs 8 are set to appropriate widths according to the thickness, strength, and the like of the flooring material 4. The floor material 4 is usually rectangular, and the first support legs 8 are arranged at the corners of the floor material 4, the ends of each side, the central portion of the floor material, and the like. Further, the jet device 10 is also arranged at an appropriate position in relation to the air supply holes 53 provided at predetermined intervals (for example, 50 cm to 200 cm) in the side plate member 14 of the first duct 6.

Subsequently, the first duct 6 is arranged on the upper part of the foundation portion. When the first duct 6 is arranged, the first duct 6 occupies the range covered by the upper plate member 16, but this range does not particularly consider the position of the first support leg 8 and is different from this. It can be determined independently.

As shown in FIG. 4, for the first duct 6, the lower plate member 18 is arranged on the heat shield sheet 60, and the side plate members 14 are assembled on both sides of the lower plate member 14 by splicing or the like. The side plate member 14 arranged near the jet device 10 is provided with an air supply hole 53 for sending out conditioned air in advance.

Next, the upper plate member 16 of the first duct 6 is arranged on the upper part of the side plate material 14, and the upper part of the side plate material 14 and the end portion of the upper plate material 16 are joined by means of a button punch splicing to assemble the two. ..
At this time, if the first support leg 8 is located within the range of the first duct 6 and both of them overlap, the first support leg 8 is placed on the floor material mounting portion 30 of the first support leg 8 as it is. The upper plate material 16 of the duct 6 is covered, and both ends of the upper plate material 16 are connected to the left and right side plate materials 14.
Then, the corresponding portion of the upper plate material 16 to be mounted on the floor material mounting portion 30 of the first support leg 8 is fixed by using a fastener such as a screw or an adhesive. By fixing the upper plate material 16 in this way, vibration of each plate material of the first duct 6 due to a change in the amount of air blown through the flowing air or the like is prevented.
The flooring material 4 is laid on the upper plate material 16 above the flooring material placing portion 30.
In this case, the first support leg 8 may be erected and fixed on the upper portion of the lower plate member 18 of the first duct 6 as the foundation portion.

As described above, in the first duct 6, the upper plate material 16 can be attached to the side plate material 14 by splicing, and the upper plate material 16 can be removed and opened / closed if necessary, so that the upper plate material 16 can be attached. And its position is easy to determine and work is easy.
Regarding the arrangement of the first duct 6, the installation position of the first support leg 8 is not affected in any way. The joints of the upper plate members 16 and the side plate members 14 of the first duct 6 are partially overlapped and screwed together, or joined by a seaming joint such as a flat hemming and seaming.
The first duct 6 is constructed according to the above procedure and is arranged based on a predetermined arrangement form.

The conditioned air flowing through the first duct 6 is further branched and sent to the jet device 10 to perform underfloor air conditioning. The first duct 6 and the jet device 10 are connected by using a bellows-shaped communication member 54 such as a flexible duct.
In the communication member 54, the connecting plate 56 at one end is attached to the portion of the air supply hole 53 provided in the side plate 14 of the first duct 6, and the other end is the introduction port 46 of the jet nozzle portion 44 in the jet device 10. Connect to.
In the construction procedure, it is also possible to adopt a procedure in which the first duct 6 (other than the upper plate member 16) is arranged first and the first support leg 8 is arranged later. In this case, the corresponding first support leg 8 is arranged on the lower plate material 18, and the first support leg 8 is fixed to the lower plate material 18 and the foundation portion. Further, the upper plate member 16 of the first duct 6 is attached after the first support legs 8 are arranged.

When the installation of the first support leg 8, the first duct 6, the jet device 10, and the like is completed, the seat panel 62 and the like as the floor material 4 are arranged above the first support leg 8 and the like.
At this time, when the first support leg 8 is arranged inside the first duct 6, it is above the first duct 6 held by the floor material mounting portion 30 of the first support leg 8. The seat panel 62 is placed on the upper part of the plate member 16. In this way, the floor material mounting portion 30 of the first support leg 8 holds the upper plate material 16 and supports the seat panel 62.

The seat panel 62 is supported by the floor material mounting portion 30 of the first support leg 8 arranged at an appropriate position, and is laid over the entire floor. A waste material 63 is laid on the upper part of the seat panel 62, and a finishing material 64 is further laid on the upper part to finish the floor surface.
Since the upper plate material 16 of the first duct 6 is formed in an arc shape whose cross section bulges upward and has a flexible property, the upper plate material 16 is natural even with respect to displacement, vibration, etc. of the floor material 4. It bends and cushions, and does not affect the flow path of the first duct 6.

The conditioned air inlet of the first duct 6 communicates with the air conditioner, and the conditioned air for heating or cooling is sent out from the air conditioner.
The conditioned air from the air conditioner circulates through the flow passage of the first duct 6 from the introduction port. In this flow passage, the conditioned air is diverted to the jet devices 10 provided in various places, and the conditioned air is blown from the jet nozzle portion 44 of the jet device 10 to the back surface portion of the floor material 4, and the temperature of the floor material 4 itself is adjusted and under the floor. Air conditioning is performed in the space. Then, the surface temperature of the floor material 4 is adjusted by the air-conditioned air, the room is air-conditioned by radiant air-conditioning from the floor surface, and the room can be directly air-conditioned by introducing a part of the air-conditioned air under the floor into the room. ..
The conditioned air discharge port from the first duct 6 may be either open (connected to the air conditioner) or closed (all discharged from the jet nozzle portion 44), but is discharged from the discharge port and is also discharged from the jet nozzle. Part or all of the air ejected from the unit 44 is taken into the air conditioner again, and after heat exchange, it is sent out as new air-conditioned air to improve the thermal efficiency.

Therefore, according to the first embodiment, the layout of the first duct as the flow path of the conditioned air can be freely designed regardless of the arrangement of the first support legs, and the first The size of the duct can be set freely, which gives it a high degree of freedom and versatility. In addition, the air-conditioned air can be circulated throughout the floor of the room for good air conditioning. In addition, the first duct It is easy to arrange and assemble, does not affect the laying of flooring materials, and is excellent in workability because each member can be installed freely and easily, and each member is easy to manufacture and economical. There is an effect.
In addition, the first duct is not restricted by the first support legs or the like and can be freely arranged in the underfloor space, and at the same time, the size of the first duct can be adjusted as a flow passage suitable for the desired air volume of the conditioned air. It can be set freely.

It should be noted that the following other forms can be adopted for the first duct.
For example, there is a form in which the lower plate material and the left and right side plate materials are integrated (the upper part has an open cross section U-shaped), and the upper plate material is attached between the upper parts of the both side plate materials.
Further, it is also possible to use a member (upper member) having a U-shaped cross section (a shape in which the lower part is open) in which the upper plate material and the left and right side plate materials are integrated as the first duct. Further, a lower member having a U-shaped cross section (a shape with an open upper part) is used as the lower plate material for the upper member, the upper member is covered with the lower member, and both side portions are fixed with screws or joints. There is also a form to do.
Further, an upper member (L-shaped cross section) in which the upper plate material and one of the left and right side plates are integrated, and a lower member in which the lower plate material and the other left and right side plates are integrated are used. It is also possible to fix the connecting portions (two diagonal locations) of both members with joints or screws.
Furthermore, the left and right side plate parts are divided into upper and lower parts, the upper part is integrated with the upper plate material, the lower part is integrated with the lower plate material, and the side plate materials (divided into upper and lower parts) of the two integrated parts are spliced together or There is also a form of connecting with screws or the like to form the first duct.
In addition, the upper plate material is divided into two parts on the left and right, and the right side member (L-shaped cross section) in which the upper plate material on the right side and the side plate material are integrated, and the upper plate material on the left side and the side plate material are integrated. There is also a form in which the left side member (L-shaped cross section) is faced and the upper plate members (one half) are connected to each other at the central portion.
In this way, the first duct has a form consisting of an upper plate material and left and right side plate materials, and a form in which a lower plate material is further added, but each plate material is integrated or separated (joined and integrated at the time of assembly). Any form can be adopted.
Further, each plate material itself may be formed in an arc shape or the like in cross section, and the corner portions of the plate materials may be formed in a rounded shape (arc shape, radius shape) other than a right angle.
Regarding any of the above-mentioned first duct forms, other configurations, arrangement forms, and construction methods are substantially the same, and the same effects as described above can be obtained.

Next, the underfloor air conditioning structure according to the second embodiment will be described.
As shown in FIG. 5, this underfloor air-conditioning structure supports a floor material 74 that forms a floor surface above the foundation of a building, a second duct 76 that forms an air-conditioning air flow path, a floor material 74, and the like. It has a second support leg 78 and the like. Further, the jet device 10 is connected to the second duct 76 to perform underfloor air conditioning. Here, the same items as those in the first embodiment are designated by the same reference numerals or the same expressions and the like are used, and detailed description thereof will be omitted here.

The floor material 74 is mainly composed of a rectangular panel material, and a metal material (steel material, light metal material such as aluminum, etc.), hard wood, or wood material is used. Here, in particular, a square (for example, 500 mm × 500 mm) steel flooring material 74 (OA panel) is used. The metal flooring material 74 is hard and inflexible, and there is almost no displacement such as sinking of the floor.

The second duct 76 is composed of left and right side plate members 84, an upper plate member 86 arranged between the upper portions of the side plate members 84, a lower plate member 88, and the like. Each of these plate members has a rectangular shape having a predetermined dimension (for example, 50 cm to 200 cm) in the extending direction, and these are arranged and connected in a straight line or a right angle to form a second duct 76.
The second duct 76 uses a metal material, and here, a rectangular steel plate is bent and molded.

The upper plate material 86, the side plate material 84, and the lower plate material 88 of the second duct 76 all have a flat shape as a whole (other than the end portion).
The second duct 76 has a form in which the upper plate member 86 is arranged at a position slightly below the floor material 74. This is because the upper end portion of the second support leg 78 is not suitable for holding the upper plate material 86 in shape, and the floor material 74 does not sink in the floor, and the lower surface portion of the floor material 74 and the upper plate material This is because if an appropriate gap is provided between the floor material 74 and the floor material 74, there is no concern that the lower surface portion of the floor material 74 will hit the upper plate material 86 of the second duct 76.

Further, the second support leg 78 supports the floor material 74 at the upper end portion thereof, and holds the upper plate material 86 of the second duct 76 below the floor material 74. The form is adopted. This is a form in which the second support leg 78 is arranged inside the second duct 76 when the arrangement position of the second duct 76 overlaps with the arrangement position of the second support leg 78. In this case, the second support leg 78 is arranged. This is because the floor material 74 and the upper plate material 86 are supported or held by the support legs 78 of the above.
Further, since the second support leg 78 has an upper and lower two-stage structure, the upper portion needs to be arranged so as to penetrate the upper plate material 86. Therefore, the insertion hole portion 87 is previously provided at the corresponding portion of the upper plate material 86. Is provided.

Further, the upper ends of the left and right side plate members 84 of the second duct 76 and the left and right end portions of the upper plate member 16 are joined by a seaming joint, a seaming folding caulking, or the like that mesh with each other. As the joint portion here, a joint form such as a button punch splicing 15 (or Pittsburgh splicing) is used.
When the upper plate material 86 is joined to the side plate material 84 by the seaming joint 15, the locking portion of the upper plate material 86 is inserted into the folded portion of the side plate material 84, and the locking portion is locked to the folded portion. ..

In the second duct 76, since the upper plate material 86 is joined to the side plate material 84 in the above-mentioned locked state, it is possible to remove the upper plate material 86 by removing the locked state with a tool or the like. be.
Further, the second duct 76 can be removed by sliding the upper plate material 86, and the upper plate material 86 is attached to the side plate material 84 so as to be removable and can be opened and closed in the lateral direction.

The side plate member 84 of the second duct 76 and the lower plate member 88 are also joined by a seaming joint or a screw fastening that engages with each other. In the hemming and seaming here, a joining form such as a button punch hemming and seaming (or Pittsburgh hemming) can be used.
In this way, a U-shaped three-sided frame with an open upper part is formed on the upper part of the foundation part, and the upper plate material 86 is spliced on the upper parts of the plate materials 84 and 84 on both sides and connected by a caulking structure. Form the duct structure of the frame.

In this way, the upper plate material 86 can be sequentially arranged and attached from the state of the three-sided frame (lower plate material 88 and both side plate materials 84, 84), which facilitates the work of assembling the second duct 76. Good sex. Further, even when the second support leg 78 is arranged inside the second duct 76, the second support leg 78 is projected from the insertion hole portion 87 of the upper plate member 86, and the insertion hole portion 87 and the second support leg 78 are formed. Work such as adjusting the positional relationship with the second support leg 78 can be easily performed.

Further, the second duct 76 may be in a form in which the lower plate material 88 is not used. In this case, a duct structure of a three-sided frame composed of both side plate members 84 and 84 and an upper plate member 86 is formed on the upper part of the foundation portion. At this time, for example, a long fixture having an L-shaped cross section is used, the fixture is fixed to the foundation portion, the side plate member 84 is connected to the fixture, and the lower portion of the side plate member 84 of the second duct 76 is used as the foundation. Can be fixed to the part.

As shown in FIG. 6, the second support leg 78 is a flat plate-shaped pedestal portion 90 with a clip 109 for stopping wiring and the like, a leg portion 91 erected on the pedestal portion 90, and an upper plate mounting portion 92. And has a flooring material mounting portion 94. The leg portion 91 includes a hollow height adjusting portion 96 and a support bolt 98 screwed into the height adjusting portion 96 so as to be height-adjustable. A screw groove is engraved in the support bolt 98, and an upper plate mounting portion 92 is screwed in the middle portion thereof, and a floor material mounting portion 94 is screwed in the upper end portion thereof.

The upper plate mounting portion 92 is a holding piece 93 composed of a portion screwed into the support bolt 98 and a plate-shaped portion protruding laterally from this portion, and a hollow disk-shaped portion arranged above the holding piece 93. It has a holding member 95. The height of the holding piece 93 can be adjusted, and at the same time, the height of the holding member 95 can be adjusted. The upper plate mounting portion 92 holds the upper plate material 86 of the second duct 76.
When the second support leg 78 is used to support only the floor material 74 and is not used to hold the upper plate material 86 of the second duct 76, it is not always necessary to provide the upper plate mounting portion 92.

In the floor material mounting portion 94, a tubular portion 104 is formed in the center of the plate-shaped (square-shaped) mounting portion 102, and prismatic fitting portions 106 are provided on each of the four sides of the mounting portion 102. There is. A screw groove is formed on the inner circumference of the tubular portion 104, and is screwed to the support bolt 98 so that the height can be adjusted.
The seat member 108 is arranged in a cross shape over the upper part of each fitting portion 106. The seating material 108 is made of synthetic resin and functions as a cushioning material between the seating material 108 and the flooring material 74 placed on the upper part.
The second support leg 78 fixes the pedestal portion 90 to the foundation portion, holds the upper plate material 86 of the second duct 76 by the upper plate mounting portion 92, and holds the floor material 74 by the floor material mounting portion 94. To support.

The jet device 10 has a leg portion 42 erected in the center of the pedestal portion 40 and a jet nozzle portion 44, and the jet nozzle portion 44 blows out the conditioned air introduction port 46, the swirl chamber 48, and the conditioned air. It is composed of a jet outlet 50 and the like.
The second duct 76 and the jet nozzle portion 44 are connected by a communication member 54. Further, the side plate member 84 of the second duct 76 is provided with an air supply hole 53 for communicating with the communication member 54 at an appropriate position. The conditioned air flowing through the second duct 76 is branched by the communication member 54 and sent to the jet nozzle portion 44.

The height of the leg 42 of the jet device 10 can be adjusted, and the second support is provided by attaching a member similar to the floor material mounting portion 94 of the second support leg 78 to the upper end of the leg 42. It is also possible to support the flooring material 74 as well as the legs 78.
The jet device 10 is effective for efficiently blowing conditioned air onto the floor material 74 to adjust the temperature of the floor material 74 and to perform underfloor air conditioning. In addition, a plurality of ejection holes for air ejection may be provided in the upper plate member 86 or the side plate member 84 of the second duct 76, and conditioned air may be ejected from these ejection holes to perform underfloor air conditioning.
The second duct 76, etc. is processed in advance at a factory or the like, and is assembled at the site.

Here, the arrangement form of the second duct 76, the second support leg 78, and the like will be described.
Regarding the arrangement form related to the construction of the second duct 76, the second support leg 78, and the floor material 74, the arrangement form related to the first duct 6, the first support leg 8, and the floor material 4 and the like. Is almost the same as.
The second support legs 78 are arranged in a grid pattern at the positions of the corners of the flooring material 74 to be placed on the second support legs 78, and at the positions where the corners of the plurality of (2 to 4) flooring materials 74 abut each other. Install.

There are various arrangement forms of the second duct 76 arranged in the foundation portion, such as a U-shape, and the conditioned air is uniformly distributed throughout the underfloor space portion.
Further, the arrangement position of the second duct 76 is determined regardless of the arrangement position of the second support leg 78. Therefore, the second support leg 78 is located within the arrangement position (inside) of the second duct 76, and a portion where both are overlapped is generated.

Here, when the second support leg 78 is arranged inside the second duct 76, the upper plate member 86 of the second duct 76 is held by the second support leg 78. Therefore, the second support leg 78 supports the floor material 74 by the floor material mounting portion 94, and mounts and holds the upper plate material 86 of the second duct 76 by the upper plate mounting portion 92.
When the arrangement position of the second duct 76 overlaps with the second support leg 78, the floor material mounting portion 94 of the second support leg 78 freely passes through the corresponding portion of the second duct 76. A possible insertion hole 87 is provided.

An upper plate mounting portion 92 is attached to the second support leg 78 that overlaps with the second duct 76. The upper plate mounting portion 92 mounts the upper plate material 86 (peripheral portion of the insertion hole portion 87) of the second duct 76 and holds the upper plate material 86.
The insertion hole portion 87 provided in the upper plate member 86 of the second duct 76 is formed larger than the floor material mounting portion 94 of the second support leg 78 to allow the floor material mounting portion 94 to pass through.

Further, the insertion hole portion 87 of the upper plate material 86 is formed to be smaller than the holding member 95 of the upper plate mounting portion 92 so that the upper plate material 86 can be placed on the upper portion of the holding member 95, and the insertion hole portion 87 is formed. Block.
Here, since the insertion hole portion 87 and the holding member 95 are each formed in a circular shape, the diameter of the insertion hole portion 87 is formed to be smaller than the diameter of the holding member 95. As a result, the upper plate member 86 can be placed on the upper part of the holding member 95 and held, and the holding member 95 covers the entire insertion hole portion 87 and closes the insertion hole portion 87.

Subsequently, the construction of the second duct 76, the second support leg 78, the floor material 74, and the like will be described.
The construction of the second duct 76, the second support leg 78, the floor material 74, etc. is substantially the same as the construction of the first duct 6, the first support leg 8, the floor material 4, and the like.
First, the heat shield sheet 60 is laid on the foundation surface 2 of the building. When arranging the second support leg 78, the jet device 10, the second duct 76, etc., these are arranged above the heat shield sheet 60 (or the lower plate member 88 of the second duct 76). The second support leg 78, the jet device 10, the second duct 76, and the like may be installed directly on the upper part of the foundation surface.

Then, the second support leg 78 is arranged on the heat shield sheet 60 or the foundation surface as the foundation portion, and the pedestal portion 90 arranged at the grid-shaped intersection of the grid is fixed by using screws or the like.
The jet device 10 is also arranged and fixed in the same manner as the second support leg 78. At this time, a jet device 10 may be arranged in place of the second support leg 78, and the floor material 74 may be supported by the jet device 10.

The vertical and horizontal intervals between the second support legs 78 are set to an appropriate width so that the second support legs 78 are arranged at the corners of the floor material 74 (square), and the jet device 10 is also the second. Arrange at an appropriate position depending on the relationship with the duct 76.
Further, the corner portion of the flooring material 74 can be fitted with a part of the flooring material mounting portion 94 of the second support leg 78, and the flooring material mounting portion 94 allows the corner portions of the four flooring materials 74. These can be supported in a state where they are butted against each other.

Next, as shown in FIG. 7, a second duct 76 is arranged on the upper part of the foundation portion. For the second duct 76, the lower plate member 88 is arranged on the heat shield sheet 60, and the side plate members 84 are assembled on both sides thereof by splicing or the like. The side plate member 84 arranged near the jet device 10 is provided with an air supply hole 53 in advance.

Then, the upper plate material 86 is arranged on the upper portions of the side plate materials 84 and 84, and the upper portion of the side plate material 84 and the end portion of the upper plate material 86 are joined by means of a seaming joint with a button punch to assemble them. At this time, since the upper plate material 86 can be removed and opened / closed (horizontally, etc.) with respect to the side plate material 84 by splicing, it is easy to determine the position of the upper plate material 86 and the work is easy.

As shown in FIG. 7, when the arrangement position of the second duct 76 overlaps with the second support leg 78, the insertion hole portion 87 to the insertion hole portion 87 provided at the corresponding portion of the upper plate material 86 in the second duct 76 is the first. The floor material mounting portion 94 or the like, which is a part of the second support leg 78, is projected, and the floor material mounting portion 94 supports the floor material 74.
Here, since the upper plate member 86 overlaps at three locations and the second support leg 78 overlaps, insertion holes 87 are provided at the corresponding three locations, respectively.

Then, the holding member 95 of the upper plate mounting portion 92 of the second support leg 78 holds the periphery of the insertion hole portion 87 of the upper plate member 86 from below. At this time, the height of the upper plate mounting portion 92 is adjusted, and the holding member 95 of the upper plate mounting portion 92 and the upper plate material 86 are overlapped with each other. In this way, the holding member 95 of the upper plate mounting portion 92 covers the insertion hole portion 87 of the upper plate material 86 so that the conditioned air passing through the second duct 76 does not leak from the insertion hole portion 87.
Further, the portion where the upper plate member 86 and the upper plate mounting portion 92 (holding member 95 or the like) overlap is fixed by using a fastener such as a screw or an adhesive. In this way, by fixing the portion around the insertion hole portion 87 of the upper plate material 86 to the upper plate mounting portion 92, vibration of each plate material of the second duct 76 due to a change in the amount of air flow of the flowing air or the like is prevented. ..
The joints of the upper plate members 86 of the second duct 76 and the side plate members 84 are partially overlapped and screwed together, or joined by a seaming joint such as a flat hemming and seaming.
The second duct 76 is constructed according to the above procedure and is arranged based on a predetermined arrangement form.

The conditioned air flowing through the second duct 76 is further branched and sent to the jet device 10 to perform underfloor air conditioning. In the communication member 54 that connects the second duct 76 and the jet device 10, the connecting plate 56 at one end is attached to the air supply hole 53 of the first duct 76, and the other end is the introduction of the jet nozzle portion 44. Connect to mouth 46.
In the construction procedure, it is also possible to adopt a procedure in which the second duct 76 (other than the upper plate material 86) is arranged first and the second support leg 78 is arranged later. In this case, the corresponding second support leg 78 is arranged on the lower plate material 88, and the second support leg 78 is fixed to the lower plate material 88, the foundation portion, and the like. Further, the upper plate member 86 of the second duct 76 is attached after the second support leg 78 is arranged.

After the installation of the second support leg 78, the second duct 76, the jet device 10, etc. is completed, the floor material 74 is arranged on the upper part of the second support leg 78, etc. The floor material 74 has corners placed on the floor material mounting portion 94 of the second support leg 78, and each corner portion at the four corners is supported by the second support leg 78 arranged at each position. Then, all the flooring materials 74 are laid to finish the floor surface.

The air-conditioned air inlet of the second duct 76 communicates with the air conditioner. Air-conditioned air for heating or cooling is sent from the air conditioner.
The conditioned air from the air conditioner circulates through the flow passage of the second duct 76 from the introduction port. In this flow passage, the conditioned air is diverted to the jet devices 10 provided in various places, and the conditioned air is blown from the jet nozzle portion 44 of the jet device 10 to the back surface portion of the floor material 74 to adjust the temperature of the floor material 74 itself and under the floor. Air conditioning is performed in the space. Then, the surface temperature of the floor material 4 is adjusted by the air-conditioned air, the room is air-conditioned by radiant air-conditioning from the floor surface, and the room can be directly air-conditioned by introducing a part of the air-conditioned air under the floor into the room. ..

Therefore, according to the second embodiment, the layout of the second duct as the flow path of the conditioned air can be freely designed regardless of the arrangement of the second support legs, and the second embodiment can be freely designed. The size of the duct can be set freely, which gives it a high degree of freedom and versatility. In addition, the air-conditioned air can be circulated throughout the lower floor of the room for good air conditioning. It is easy to arrange and assemble, does not affect the laying of flooring materials, and is excellent in workability because each member can be installed freely and easily, and each member is easy to manufacture and economical. There is an effect.
In addition, the second duct is not restricted by the second support legs or the like and can be freely arranged in the underfloor space, and at the same time, the size of the second duct can be adjusted as a flow passage suitable for the desired air volume of the conditioned air. It can be set freely.

The second duct also has a form similar to that described in the other forms of the first duct, for example, a U-shaped cross section in which the upper plate material or the lower plate material and the side plate material are integrated, and a cross section L. It is possible to adopt a form such as a character shape. In this way, the second duct has a form consisting of an upper plate material and left and right side plate materials, and a form in which a lower plate material is further added, but each plate material is integrated or separated (joined and integrated at the time of assembly). Any form can be adopted.
The other configurations, arrangement forms, and construction methods are the same for any of the above-mentioned second duct forms, and the same effects as described above can be obtained.

4,74 Floor material 6 First duct 8 First support leg 10 Flooring device 14,84 Side plate material 16,86 Upper plate material 18,88 Lower plate material 30,94 Floor material mounting part 44 Ejection nozzle part 54 Communication member 76 Second duct 78 Second support leg 87 Insertion hole 92 Top plate mounting part

Claims (7)

A plurality of first support legs erected on the foundation and provided with flooring on the upper end,
The flooring material to be placed on the flooring material mounting part of the first support leg and
A first duct, which is arranged under the floor material and is composed of left and right side plate materials and an upper plate material provided between the upper portions of these side plate materials, and forms a flow path for conditioned air for performing underfloor air conditioning. Have and
The upper plate material of the first duct is formed in an arc shape having a cross section protruding upward.
When the arrangement position of the first duct overlaps with a part of the first support legs, the first support legs of the part are arranged inside the first duct, and the first of the part is arranged. An underfloor air-conditioning structure characterized in that the upper plate material of the first duct and the floor material arranged on the upper plate material of the first duct are simultaneously placed and supported on the floor material mounting portion of one support leg. The underfloor air-conditioning structure according to claim 1, wherein the corresponding portion of the upper plate material mounted on the floor material mounting portion of the first support leg is fixed to the floor material mounting portion. The underfloor air conditioning according to claim 1 or 2 , wherein the upper plate material is joined to the both side plate materials so as to be removable or openable between the upper portion of the both side plate materials and the upper plate material. structure. The underfloor air-conditioning structure according to claim 3 , wherein the joints between the upper portion of the both side plate members and the both side end portions of the upper plate material are joined by a seaming joint. A jet device having a jet nozzle attached to the upper part of the leg is arranged on the foundation, and the conditioned air is made to flow into the jet nozzle by using a communication member that communicates with the flow passage of the conditioned air, and the jet nozzle is used. The underfloor air-conditioning structure according to any one of claims 1 to 4 , wherein air-conditioned air is blown from a portion toward the floor material or below the floor. The underfloor air-conditioning structure according to claim 5 , wherein a floor material mounting portion is provided at an upper end of a leg portion of the flooring device, and the floor material is supported by the floor material mounting portion. The underfloor air-conditioning structure according to any one of claims 1 to 6 , wherein a lower plate material is provided between the lower portions of the left and right side plate materials.

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